WorldWideScience

Sample records for complex para state

  1. State Complexity of Testing Divisibility

    Directory of Open Access Journals (Sweden)

    Emilie Charlier

    2010-08-01

    Full Text Available Under some mild assumptions, we study the state complexity of the trim minimal automaton accepting the greedy representations of the multiples of m >= 2 for a wide class of linear numeration systems. As an example, the number of states of the trim minimal automaton accepting the greedy representations of the multiples of m in the Fibonacci system is exactly 2m^2.

  2. Radar, geologic, airborne gamma ray and Landsat TM digital data integration for geological mapping of the Estrela granite complex (Para State)

    International Nuclear Information System (INIS)

    Cunha, Edson Ricardo Soares Pereira da

    2002-01-01

    This work is focused on the geotectonic context of the Carajas Mineral Province, Amazon Craton, which represents the most important Brazilian Mineral Province and hosts iron, cooper, gold, manganese and nickel deposits. At the end of Archean age, during the techno-metamorphic evolution, moderated alkaline granitoids were generated, such as, Estrela Granite Complex (EGC). This work has used digital integration products with the purpose of study the granite suite, its host rock, and the surrounded area. The digital integrated data were gamma-ray and geological data with satellite images (SAR-SAREX e TM-Landsat). The geophysics data, originally in 32 bits and grid format, were interpolated and converted to 8 bits images. The geological data (facies map) was digitalized and converted to a raster format. The remote sensing images were geometrically corrected to guarantee an accuracy on the geological mapping. On the data processing phase, SAR images were digital integrated with gamma-ray data, TM-Landsat image and the raster facies map. The IHS transformation was used as the technique to integrate the multi-source data. On the photogeological interpretation, SAR data were extremely important to permit the extraction of the main tectonic lineaments which occur on the following directions: +/- N45W, +/- N70W, +/- NS, +/- N20E, +/- N45E e +/- N75E. This procedure was done both in analogic and automatic form, being the automatic process more useful to complement information in the extracting process. Among the digital products generated, SAR/GAMA products (uranium, thorium and total count) were the ones that give the most important contribution. The interpretation of the SAR/GAMA's products added to the field campaign have allowed to map the limits of units that occur in the region and four facies of the Estrela Granite Complex were detected. The origin of the granite suite might be related to a magmatic differentiation or to distinct intrusion pulses. The use of the

  3. PARA'04, State-of-the-art in scientific computing

    DEFF Research Database (Denmark)

    Madsen, Kaj; Wasniewski, Jerzy

    This meeting in the series, the PARA'04 Workshop with the title ``State of the Art in Scientific Computing'', was held in Lyngby, Denmark, June 20-23, 2004. The PARA'04 Workshop was organized by Jack Dongarra from the University of Tennessee and Oak Ridge National Laboratory, and Kaj Madsen and J...

  4. Communication complexity reduction from globally uncorrelated states

    Energy Technology Data Exchange (ETDEWEB)

    Wieśniak, Marcin, E-mail: marcin.wiesniak@univie.ac.at

    2015-04-03

    Bell inequality violating entangled states are the working horse for many potential quantum information processing applications, including secret sharing, cryptographic key distribution and communication complexity reduction in distributed computing. Here we explicitly demonstrate the power of certain multi-qubit states to improve the efficiency of partners in joint computation of some multi-qubit function, despite the fact that there could be no correlations between all distributed particles. It is important to stress that the class of functions that can be computed more efficiently is widened, as compared with the standard Bell inequalities. - Highlights: • We expand the set of functions, which can be computed more efficiently with quantum states. • We describe communication complexity reduction protocols based not only on full correlations. • We explicitly show an instance where, a globally uncorrelated state reduces communication complexity.

  5. Communication complexity reduction from globally uncorrelated states

    International Nuclear Information System (INIS)

    Wieśniak, Marcin

    2015-01-01

    Bell inequality violating entangled states are the working horse for many potential quantum information processing applications, including secret sharing, cryptographic key distribution and communication complexity reduction in distributed computing. Here we explicitly demonstrate the power of certain multi-qubit states to improve the efficiency of partners in joint computation of some multi-qubit function, despite the fact that there could be no correlations between all distributed particles. It is important to stress that the class of functions that can be computed more efficiently is widened, as compared with the standard Bell inequalities. - Highlights: • We expand the set of functions, which can be computed more efficiently with quantum states. • We describe communication complexity reduction protocols based not only on full correlations. • We explicitly show an instance where, a globally uncorrelated state reduces communication complexity

  6. Bipartite quantum states and random complex networks

    International Nuclear Information System (INIS)

    Garnerone, Silvano; Zanardi, Paolo; Giorda, Paolo

    2012-01-01

    We introduce a mapping between graphs and pure quantum bipartite states and show that the associated entanglement entropy conveys non-trivial information about the structure of the graph. Our primary goal is to investigate the family of random graphs known as complex networks. In the case of classical random graphs, we derive an analytic expression for the averaged entanglement entropy S-bar while for general complex networks we rely on numerics. For a large number of nodes n we find a scaling S-bar ∼c log n +g e where both the prefactor c and the sub-leading O(1) term g e are characteristic of the different classes of complex networks. In particular, g e encodes topological features of the graphs and is named network topological entropy. Our results suggest that quantum entanglement may provide a powerful tool for the analysis of large complex networks with non-trivial topological properties. (paper)

  7. An application of sample entropy to precipitation in Paraíba State, Brazil

    Science.gov (United States)

    Xavier, Sílvio Fernando Alves; da Silva Jale, Jader; Stosic, Tatijana; dos Santos, Carlos Antonio Costa; Singh, Vijay P.

    2018-05-01

    A climate system is characterized to be a complex non-linear system. In order to describe the complex characteristics of precipitation series in Paraíba State, Brazil, we aim the use of sample entropy, a kind of entropy-based algorithm, to evaluate the complexity of precipitation series. Sixty-nine meteorological stations are distributed over four macroregions: Zona da Mata, Agreste, Borborema, and Sertão. The results of the analysis show that intricacies of monthly average precipitation have differences in the macroregions. Sample entropy is able to reflect the dynamic change of precipitation series providing a new way to investigate complexity of hydrological series. The complexity exhibits areal variation of local water resource systems which can influence the basis for utilizing and developing resources in dry areas.

  8. Quantum State Description Complexity (Invited Talk)

    OpenAIRE

    Vazirani, Umesh V.

    2011-01-01

    Quantum states generally require exponential sized classical descriptions, but the long conjectured area law provides hope that a large class of natural quantum states can be described succinctly. Recent progress in formally proving the area law is described.

  9. Correlation/Communication complexity of generating bipartite states

    OpenAIRE

    Jain, Rahul; Shi, Yaoyun; Wei, Zhaohui; Zhang, Shengyu

    2012-01-01

    We study the correlation complexity (or equivalently, the communication complexity) of generating a bipartite quantum state $\\rho$. When $\\rho$ is a pure state, we completely characterize the complexity for approximately generating $\\rho$ by a corresponding approximate rank, closing a gap left in Ambainis, Schulman, Ta-Shma, Vazirani and Wigderson (SIAM Journal on Computing, 32(6):1570-1585, 2003). When $\\rho$ is a classical distribution $P(x,y)$, we tightly characterize the complexity of gen...

  10. Toward a Definition of Complexity for Quantum Field Theory States.

    Science.gov (United States)

    Chapman, Shira; Heller, Michal P; Marrochio, Hugo; Pastawski, Fernando

    2018-03-23

    We investigate notions of complexity of states in continuous many-body quantum systems. We focus on Gaussian states which include ground states of free quantum field theories and their approximations encountered in the context of the continuous version of the multiscale entanglement renormalization ansatz. Our proposal for quantifying state complexity is based on the Fubini-Study metric. It leads to counting the number of applications of each gate (infinitesimal generator) in the transformation, subject to a state-dependent metric. We minimize the defined complexity with respect to momentum-preserving quadratic generators which form su(1,1) algebras. On the manifold of Gaussian states generated by these operations, the Fubini-Study metric factorizes into hyperbolic planes with minimal complexity circuits reducing to known geodesics. Despite working with quantum field theories far outside the regime where Einstein gravity duals exist, we find striking similarities between our results and those of holographic complexity proposals.

  11. Toward a Definition of Complexity for Quantum Field Theory States

    Science.gov (United States)

    Chapman, Shira; Heller, Michal P.; Marrochio, Hugo; Pastawski, Fernando

    2018-03-01

    We investigate notions of complexity of states in continuous many-body quantum systems. We focus on Gaussian states which include ground states of free quantum field theories and their approximations encountered in the context of the continuous version of the multiscale entanglement renormalization ansatz. Our proposal for quantifying state complexity is based on the Fubini-Study metric. It leads to counting the number of applications of each gate (infinitesimal generator) in the transformation, subject to a state-dependent metric. We minimize the defined complexity with respect to momentum-preserving quadratic generators which form s u (1 ,1 ) algebras. On the manifold of Gaussian states generated by these operations, the Fubini-Study metric factorizes into hyperbolic planes with minimal complexity circuits reducing to known geodesics. Despite working with quantum field theories far outside the regime where Einstein gravity duals exist, we find striking similarities between our results and those of holographic complexity proposals.

  12. Phycocyanin: One Complex, Two States, Two Functions

    NARCIS (Netherlands)

    Gwizdala, Michal; Krüger, Tjaart P.J.; Wahadoszamen, Md; Gruber, J. Michael; Van Grondelle, Rienk

    2018-01-01

    Solar energy captured by pigments embedded in light-harvesting complexes can be transferred to neighboring pigments, dissipated, or emitted as fluorescence. Only when it reaches a reaction center is the excitation energy stabilized in the form of a charge separation and converted into chemical

  13. Optimized Binomial Quantum States of Complex Oscillators with Real Spectrum

    International Nuclear Information System (INIS)

    Zelaya, K D; Rosas-Ortiz, O

    2016-01-01

    Classical and nonclassical states of quantum complex oscillators with real spectrum are presented. Such states are bi-orthonormal superpositions of n +1 energy eigenvectors of the system with binomial-like coefficients. For large values of n these optimized binomial states behave as photon added coherent states when the imaginary part of the potential is cancelled. (paper)

  14. Weaving and neural complexity in symmetric quantum states

    Science.gov (United States)

    Susa, Cristian E.; Girolami, Davide

    2018-04-01

    We study the behaviour of two different measures of the complexity of multipartite correlation patterns, weaving and neural complexity, for symmetric quantum states. Weaving is the weighted sum of genuine multipartite correlations of any order, where the weights are proportional to the correlation order. The neural complexity, originally introduced to characterize correlation patterns in classical neural networks, is here extended to the quantum scenario. We derive closed formulas of the two quantities for GHZ states mixed with white noise.

  15. Thermodynamic Ground States of Complex Oxide Heterointerfaces

    DEFF Research Database (Denmark)

    Gunkel, F.; Hoffmann-Eifert, S.; Heinen, R. A.

    2017-01-01

    The formation mechanism of 2-dimensional electron gases (2DEGs) at heterointerfaces between nominally insulating oxides is addressed with a thermodynamical approach. We provide a comprehensive analysis of the thermodynamic ground states of various 2DEG systems directly probed in high temperature...

  16. Entropy Concept for Paramacrosystems with Complex States

    Directory of Open Access Journals (Sweden)

    Yuri S. Popkov

    2012-05-01

    Full Text Available Consideration is given to macrosystems called paramacrosystems with states of finite capacity and distinguishable and undistinguishable elements with stochastic behavior. The paramacrosystems fill a gap between Fermi and Einstein macrosystems. Using the method of the generating functions, we have obtained expressions for probabilistic characteristics (distribution of the macrostate probabilities, physical and information entropies of the paramacrosystems. The cases with equal and unequal prior probabilities for elements to occupy the states with finite capacities are considered. The unequal prior probabilities influence the morphological properties of the entropy functions and the functions of the macrostate probabilities, transforming them in the multimodal functions. The examples of the paramacrosystems with two-modal functions of the entropy and distribution of the macrostate probabilities are presented. The variation principle does not work for such cases.

  17. Visão complexa para uma forma complexa de agir / Complex vision for a complex form of action

    Directory of Open Access Journals (Sweden)

    Maria Cecilia de Souza Minayo

    2013-02-01

    Full Text Available Este artigo contém uma introdução à abordagem científi ca denominada “pensamento complexo”, complementa a visão tradicional e racionalista da ciência, oriunda do século XVII. Os autores mostram que coexistem hoje várias formas de se pensar a produção de conhecimento. Evidenciam também que a forma com que se organiza essa produção tem muito a ver com a própria organização da sociedade, da economia e do trabalho. Por exemplo, a ciência tradicional se desenvolveu a partir da lógica da revolução industrial. Já o pensamento complexo é fruto tanto das transformações sociais como de descobertas científi cas atuais e relevantes na Física, na Matemática, na Biologia, na Cibernética e nas Ciências Sociais. O texto termina mostrando que a visão complexa da ciência é fundamental para transformar as formas de pensar e de agir em saúde, particularmente, para a vigilância sanitária, para a formação de pessoas e para a gestão dos serviços. ------------------------------------------------------- This article contains an introduction to the scientifi c approach called “complex thought” that complements the traditional view of science and rationalism, coming from the seventeenth century. The authors show that coexist today several ways of thinking about knowledge production. Also show that the way that production is organized has a lot to do with the very organization of society, economy and labor. For example, the rationalist science has developed from traditional logic of the industrial revolution. Already, complex thinking is fruit of contemporary social changes and relevant scientifi c discoveries in physics, mathematics, biology, cybernetics and social sciences. The text ends by showing that the complex view of science is essential to transform the ways of thinking and acting on health, particularly for surveillance, to train people and for the management of services.

  18. Operational State Complexity of Deterministic Unranked Tree Automata

    Directory of Open Access Journals (Sweden)

    Xiaoxue Piao

    2010-08-01

    Full Text Available We consider the state complexity of basic operations on tree languages recognized by deterministic unranked tree automata. For the operations of union and intersection the upper and lower bounds of both weakly and strongly deterministic tree automata are obtained. For tree concatenation we establish a tight upper bound that is of a different order than the known state complexity of concatenation of regular string languages. We show that (n+1 ( (m+12^n-2^(n-1 -1 vertical states are sufficient, and necessary in the worst case, to recognize the concatenation of tree languages recognized by (strongly or weakly deterministic automata with, respectively, m and n vertical states.

  19. Complexity Leadership Theory: A United States Marine Corps Historical Overlay

    Science.gov (United States)

    2017-05-25

    DD-MM-YYYY) 23-04-2017 2. REPORT TYPE Master’s Thesis 3. DATES COVERED (From - To) JUN 2016 – MAY 2017 4. TITLE AND SUBTITLE Complexity...Monograph Title : Complexity Leadership Theory : A United States Marine Corps Historical Overlay Approved by...General Ridgway’s Success in Korea.” Master’s thesis , United States Army Command and General Staff College, 2010. Diana, Gabriel. “Vision, Education

  20. Ultrafast laser spectroscopy in complex solid state materials

    Energy Technology Data Exchange (ETDEWEB)

    Li, Tianqi [Iowa State Univ., Ames, IA (United States)

    2014-12-01

    This thesis summarizes my work on applying the ultrafast laser spectroscopy to the complex solid state materials. It shows that the ultrafast laser pulse can coherently control the material properties in the femtosecond time scale. And the ultrafast laser spectroscopy can be employed as a dynamical method for revealing the fundamental physical problems in the complex material systems.

  1. Radar, geologic, airborne gamma ray and Landsat TM digital data integration for geological mapping of the Estrela granite complex (Para State); Integracao digital de imagens de radar e Landsat-TM com dados geologicos e aerogamaespectrometricos no auxilio ao mapeamento geologico da regiao do complexo granitico Estrela-Para (PA)

    Energy Technology Data Exchange (ETDEWEB)

    Cunha, Edson Ricardo Soares Pereira da

    2002-07-01

    This work is focused on the geotectonic context of the Carajas Mineral Province, Amazon Craton, which represents the most important Brazilian Mineral Province and hosts iron, cooper, gold, manganese and nickel deposits. At the end of Archean age, during the techno-metamorphic evolution, moderated alkaline granitoids were generated, such as, Estrela Granite Complex (EGC). This work has used digital integration products with the purpose of study the granite suite, its host rock, and the surrounded area. The digital integrated data were gamma-ray and geological data with satellite images (SAR-SAREX e TM-Landsat). The geophysics data, originally in 32 bits and grid format, were interpolated and converted to 8 bits images. The geological data (facies map) was digitalized and converted to a raster format. The remote sensing images were geometrically corrected to guarantee an accuracy on the geological mapping. On the data processing phase, SAR images were digital integrated with gamma-ray data, TM-Landsat image and the raster facies map. The IHS transformation was used as the technique to integrate the multi-source data. On the photogeological interpretation, SAR data were extremely important to permit the extraction of the main tectonic lineaments which occur on the following directions: +/- N45W, +/- N70W, +/- NS, +/- N20E, +/- N45E e +/- N75E. This procedure was done both in analogic and automatic form, being the automatic process more useful to complement information in the extracting process. Among the digital products generated, SAR/GAMA products (uranium, thorium and total count) were the ones that give the most important contribution. The interpretation of the SAR/GAMA's products added to the field campaign have allowed to map the limits of units that occur in the region and four facies of the Estrela Granite Complex were detected. The origin of the granite suite might be related to a magmatic differentiation or to distinct intrusion pulses. The use of the

  2. The Common Core State Standards' Quantitative Text Complexity Trajectory: Figuring out How Much Complexity Is Enough

    Science.gov (United States)

    Williamson, Gary L.; Fitzgerald, Jill; Stenner, A. Jackson

    2013-01-01

    The Common Core State Standards (CCSS) set a controversial aspirational, quantitative trajectory for text complexity exposure for readers throughout the grades, aiming for all high school graduates to be able to independently read complex college and workplace texts. However, the trajectory standard is presented without reference to how the…

  3. Finite-State Complexity and the Size of Transducers

    Directory of Open Access Journals (Sweden)

    Cristian Calude

    2010-08-01

    Full Text Available Finite-state complexity is a variant of algorithmic information theory obtained by replacing Turing machines with finite transducers. We consider the state-size of transducers needed for minimal descriptions of arbitrary strings and, as our main result, we show that the state-size hierarchy with respect to a standard encoding is infinite. We consider also hierarchies yielded by more general computable encodings.

  4. Minimized state complexity of quantum-encoded cryptic processes

    Science.gov (United States)

    Riechers, Paul M.; Mahoney, John R.; Aghamohammadi, Cina; Crutchfield, James P.

    2016-05-01

    The predictive information required for proper trajectory sampling of a stochastic process can be more efficiently transmitted via a quantum channel than a classical one. This recent discovery allows quantum information processing to drastically reduce the memory necessary to simulate complex classical stochastic processes. It also points to a new perspective on the intrinsic complexity that nature must employ in generating the processes we observe. The quantum advantage increases with codeword length: the length of process sequences used in constructing the quantum communication scheme. In analogy with the classical complexity measure, statistical complexity, we use this reduced communication cost as an entropic measure of state complexity in the quantum representation. Previously difficult to compute, the quantum advantage is expressed here in closed form using spectral decomposition. This allows for efficient numerical computation of the quantum-reduced state complexity at all encoding lengths, including infinite. Additionally, it makes clear how finite-codeword reduction in state complexity is controlled by the classical process's cryptic order, and it allows asymptotic analysis of infinite-cryptic-order processes.

  5. Poynting's theorem for complex fields; El teorema de Poynting para campos complejos

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Guasti, M. [Universidad Autonoma Metropolitana-Unidad Iztapalapa, Mexico, D.F (Mexico)

    2001-04-01

    Poynting's theorem is derived for complex electromagnetic fields without invoking the harmonic dependence of the fields. This reformulation yields the functional form of a continuity equation. The definition of poynting's vector for complex fields reduces to its traditional definition for real fields without involving an extra factor of 1/2. [Spanish] Se presenta la derivacion del teorema de Poynting utilizando una representacion compleja de los campos electromagneticos. En esta reformulacion se obtiene cabalmente la forma funcional de una ecuacion de continuidad. Este resultado no requiere que los campos armonicos sean trenes de onda infinitos, de manera que con este formalismo es posible abordar el caso de pulsos electromagneticos. La definicion del vector Poynting para campos complejos se reduce a la definicion convencional si los campos son reales sin involucrar un factor de 1/2 adicional.

  6. Solid-state NMR spectroscopy on complex biomolecules

    NARCIS (Netherlands)

    Renault, M.A.M.; Cukkemane, A.A.; Baldus, M.

    2010-01-01

    Biomolecular applications of NMR spectroscopy are often merely associated with soluble molecules or magnetic resonance imaging. However, since the late 1970s, solid-state NMR (ssNMR) spectroscopy has demonstrated its ability to provide atomic-level insight into complex biomolecular systems ranging

  7. Scale effect in fatigue resistance under complex stressed state

    International Nuclear Information System (INIS)

    Sosnovskij, L.A.

    1979-01-01

    On the basis the of the fatigue failure statistic theory obtained is the formula for calculated estimation of probabillity of failure under complex stressed state according to partial probabilities of failure under linear stressed state with provision for the scale effect. Also the formula for calculation of equivalent stress is obtained. The verification of both formulae using literary experimental data for plane stressed state torsion has shown that the error of estimations does not exceed 10% for materials with the ultimate strength changing from 61 to 124 kg/mm 2

  8. Efficient growth of complex graph states via imperfect path erasure

    International Nuclear Information System (INIS)

    Campbell, Earl T; Fitzsimons, Joseph; Benjamin, Simon C; Kok, Pieter

    2007-01-01

    Given a suitably large and well connected (complex) graph state, any quantum algorithm can be implemented purely through local measurements on the individual qubits. Measurements can also be used to create the graph state: path erasure techniques allow one to entangle multiple qubits by determining only global properties of the qubits. Here, this powerful approach is extended by demonstrating that even imperfect path erasure can produce the required graph states with high efficiency. By characterizing the degree of error in each path erasure attempt, one can subsume the resulting imperfect entanglement into an extended graph state formalism. The subsequent growth of the improper graph state can be guided, through a series of strategic decisions, in such a way as to bound the growth of the error and eventually yield a high-fidelity graph state. As an implementation of these techniques, we develop an analytic model for atom (or atom-like) qubits in mismatched cavities, under the double-heralding entanglement procedure of Barrett and Kok (2005 Phys. Rev. A 71 060310). Compared to straightforward post-selection techniques our protocol offers a dramatic improvement in growing complex high-fidelity graph states

  9. The State – Nation Imbalance. Peace and Complex Circumstances

    Directory of Open Access Journals (Sweden)

    Cristian - Sorin Prună

    2008-06-01

    Full Text Available The defining reference points of this paper take into consideration the creation of severalscientific premises which would structure the approached issue - constitutional state (nationcorrelated with the term security – by reference to the current international context coordinates. Thegoal of the proposed approach is organising the elements which define the security of theconstitutional state from the perspective of the coexistence between peace and complex situations(crisis and war. In the effort of organising such a scientific matter, we attempted to realise clear,concise boundaries by means of research – the study and analysis of conflicting phenomena(conclusive factors / consequences. Thus, we pointed out the role of the modern constitutional statein the current context, the inference between the state – nation balance, through its components, topreserve peace and nation security through efficient management of complex situations.

  10. Structure of the Deactive State of Mammalian Respiratory Complex I.

    Science.gov (United States)

    Blaza, James N; Vinothkumar, Kutti R; Hirst, Judy

    2018-02-06

    Complex I (NADH:ubiquinone oxidoreductase) is central to energy metabolism in mammalian mitochondria. It couples NADH oxidation by ubiquinone to proton transport across the energy-conserving inner membrane, catalyzing respiration and driving ATP synthesis. In the absence of substrates, active complex I gradually enters a pronounced resting or deactive state. The active-deactive transition occurs during ischemia and is crucial for controlling how respiration recovers upon reperfusion. Here, we set a highly active preparation of Bos taurus complex I into the biochemically defined deactive state, and used single-particle electron cryomicroscopy to determine its structure to 4.1 Å resolution. We show that the deactive state arises when critical structural elements that form the ubiquinone-binding site become disordered, and we propose reactivation is induced when substrate binding to the NADH-reduced enzyme templates their reordering. Our structure both rationalizes biochemical data on the deactive state and offers new insights into its physiological and cellular roles. Copyright © 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.

  11. PARA'04 Workshop on State-of-the-art in Scientific Computing, June 20-23, 2004: Complementary Proceedings

    DEFF Research Database (Denmark)

    Dongarra, Jack; Madsen, Kaj; Wasniewski, Jerzy

    2004-01-01

    , was held in Lyngby, Denmark, June 20-23, 2004. The PARA'04 Workshop was organized by Jack Dongarra from the University of Tennessee and Oak Ridge National Laboratory, and Kaj Madsen and Jerzy Wasniewski from the Technical University of Denmark. The emphasis here was shifted to High-Performance Computing...... (HPC). The ongoing development of ever more advanced computers provides the potential for solving increasingly dif cult computational problems. However, given the complexity of modern computer architectures, the task of realizing this potential needs careful attention. For example, the failure......The PARA workshops in the past have been devoted to parallel computing methods in science and technology. There have been seven PARA meetings to date: PARA'94, PARA'95 and PARA'96 in Lyngby, Denmark, PARA'98 in Umeå, Sweden, PARA'2000 in Bergen, Norway, PARA'02 in Espoo, Finland, and PARA'04 again...

  12. Rare-earth element geochemistry in the Luanga Mafic-Ultramafic Complex, Para

    International Nuclear Information System (INIS)

    Suita, M.T.F.; Nilson, A.A.

    1989-01-01

    Six whole-rock samples (harzburgite, orthopyroxenic and norite) of the Luanga Mafic-Ultramafic Complex (Para) were analysed for rare-earth elements (REE) through plasma spectrometry. The Luanga Complex is a deformed and metamorphosed layered mafic-ultramafic body of Archaean age. The Complex underwent medium-grade metamorphism in three stages. The first stage (medium grade) involved local formation of tremolite and reduction of Ca content in plagioclase. The second stage (low grade) consisted of serpentinization of amphibole or ortopyroxene forming bastile and generation of albite + epidote + white mica + actinolite from plagioclase. The third stage involved renewed serpentinization and/or talcification of pre-existing minerals (including serpentine) along fracture and fault surfaces. The analysed rocks display light rare-earth element (LREE) enrichment up to sixty times the composition of the Leedly chondrite and La/Yb ratios from 6.2 to 20.0 they are low in medium rare-earth elements (MREE), displaying discrete to strong negative Eu anomaly even in plagioclase cumulates and are slightly enriched in heavy rare-earth elements (HREE), usually higher than chondrite values. The low MREE area related to the occurrence of orthopyroxene (bronzite) in a way similar to the pattern of alpine periodotites, while HREE enrichment is compatible with the presence of bronzite and Mg-olivine, probably an inherited igneous feature. (author) [pt

  13. Squeezed states and Hermite polynomials in a complex variable

    International Nuclear Information System (INIS)

    Ali, S. Twareque; Górska, K.; Horzela, A.; Szafraniec, F. H.

    2014-01-01

    Following the lines of the recent paper of J.-P. Gazeau and F. H. Szafraniec [J. Phys. A: Math. Theor. 44, 495201 (2011)], we construct here three types of coherent states, related to the Hermite polynomials in a complex variable which are orthogonal with respect to a non-rotationally invariant measure. We investigate relations between these coherent states and obtain the relationship between them and the squeezed states of quantum optics. We also obtain a second realization of the canonical coherent states in the Bargmann space of analytic functions, in terms of a squeezed basis. All this is done in the flavor of the classical approach of V. Bargmann [Commun. Pure Appl. Math. 14, 187 (1961)

  14. Space-time complexity in solid state models

    International Nuclear Information System (INIS)

    Bishop, A.R.

    1985-01-01

    In this Workshop on symmetry-breaking it is appropriate to include the evolving fields of nonlinear-nonequilibrium systems in which transitions to and between various degrees of ''complexity'' (including ''chaos'') occur in time or space or both. These notions naturally bring together phenomena of pattern formation and chaos and therefore have ramifications for a huge array of natural sciences - astrophysics, plasmas and lasers, hydrodynamics, field theory, materials and solid state theory, optics and electronics, biology, pattern recognition and evolution, etc. Our particular concerns here are with examples from solid state and condensed matter

  15. Complex projection of unitary dynamics of quaternionic pure states

    International Nuclear Information System (INIS)

    Asorey, M.; Scolarici, G.; Solombrino, L.

    2007-01-01

    Quaternionic quantum mechanics has been revealed to be a very useful framework to describe quantum phenomena. In the case of two qubit compound systems we show that the complex projection of quaternionic pure states and quaternionic unitary maps permits the description of interesting phenomena such as decoherence and optimal entanglement generation. The approach, however, presents severe limitations for the case of multipartite or higher dimensional bipartite quantum systems as we point out

  16. Unstable states produced in collisions among complex nuclei

    International Nuclear Information System (INIS)

    Sepulveda J, D.

    1978-01-01

    A theory about resonant elastic dispersion is formulated and the wave function of unstable states associated with the resonances observed in the differential and total sections is studied. The object of this theory is to extend to the elastic collisions among complex nuclei interesting case, the methods and formalism of the dispersion of particles without structure by an external potential, following an idea originally formulated by H. Feshbach. (author)

  17. Solid State Pathways towards Molecular Complexity in Space

    Science.gov (United States)

    Linnartz, Harold; Bossa, Jean-Baptiste; Bouwman, Jordy; Cuppen, Herma M.; Cuylle, Steven H.; van Dishoeck, Ewine F.; Fayolle, Edith C.; Fedoseev, Gleb; Fuchs, Guido W.; Ioppolo, Sergio; Isokoski, Karoliina; Lamberts, Thanja; Öberg, Karin I.; Romanzin, Claire; Tenenbaum, Emily; Zhen, Junfeng

    2011-12-01

    It has been a long standing problem in astrochemistry to explain how molecules can form in a highly dilute environment such as the interstellar medium. In the last decennium more and more evidence has been found that the observed mix of small and complex, stable and highly transient species in space is the cumulative result of gas phase and solid state reactions as well as gas-grain interactions. Solid state reactions on icy dust grains are specifically found to play an important role in the formation of the more complex ``organic'' compounds. In order to investigate the underlying physical and chemical processes detailed laboratory based experiments are needed that simulate surface reactions triggered by processes as different as thermal heating, photon (UV) irradiation and particle (atom, cosmic ray, electron) bombardment of interstellar ice analogues. Here, some of the latest research performed in the Sackler Laboratory for Astrophysics in Leiden, the Netherlands is reviewed. The focus is on hydrogenation, i.e., H-atom addition reactions and vacuum ultraviolet irradiation of interstellar ice analogues at astronomically relevant temperatures. It is shown that solid state processes are crucial in the chemical evolution of the interstellar medium, providing pathways towards molecular complexity in space.

  18. Complex network analysis of state spaces for random Boolean networks

    Energy Technology Data Exchange (ETDEWEB)

    Shreim, Amer [Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4 (Canada); Berdahl, Andrew [Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4 (Canada); Sood, Vishal [Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4 (Canada); Grassberger, Peter [Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4 (Canada); Paczuski, Maya [Complexity Science Group, Department of Physics and Astronomy, University of Calgary, Calgary, AB, T2N 1N4 (Canada)

    2008-01-15

    We apply complex network analysis to the state spaces of random Boolean networks (RBNs). An RBN contains N Boolean elements each with K inputs. A directed state space network (SSN) is constructed by linking each dynamical state, represented as a node, to its temporal successor. We study the heterogeneity of these SSNs at both local and global scales, as well as sample to-sample fluctuations within an ensemble of SSNs. We use in-degrees of nodes as a local topological measure, and the path diversity (Shreim A et al 2007 Phys. Rev. Lett. 98 198701) of an SSN as a global topological measure. RBNs with 2 {<=} K {<=} 5 exhibit non-trivial fluctuations at both local and global scales, while K = 2 exhibits the largest sample-to-sample (possibly non-self-averaging) fluctuations. We interpret the observed 'multi scale' fluctuations in the SSNs as indicative of the criticality and complexity of K = 2 RBNs. 'Garden of Eden' (GoE) states are nodes on an SSN that have in-degree zero. While in-degrees of non-GoE nodes for K > 1 SSNs can assume any integer value between 0 and 2{sup N}, for K = 1 all the non-GoE nodes in a given SSN have the same in-degree which is always a power of two.

  19. Complex network analysis of state spaces for random Boolean networks

    International Nuclear Information System (INIS)

    Shreim, Amer; Berdahl, Andrew; Sood, Vishal; Grassberger, Peter; Paczuski, Maya

    2008-01-01

    We apply complex network analysis to the state spaces of random Boolean networks (RBNs). An RBN contains N Boolean elements each with K inputs. A directed state space network (SSN) is constructed by linking each dynamical state, represented as a node, to its temporal successor. We study the heterogeneity of these SSNs at both local and global scales, as well as sample to-sample fluctuations within an ensemble of SSNs. We use in-degrees of nodes as a local topological measure, and the path diversity (Shreim A et al 2007 Phys. Rev. Lett. 98 198701) of an SSN as a global topological measure. RBNs with 2 ≤ K ≤ 5 exhibit non-trivial fluctuations at both local and global scales, while K = 2 exhibits the largest sample-to-sample (possibly non-self-averaging) fluctuations. We interpret the observed 'multi scale' fluctuations in the SSNs as indicative of the criticality and complexity of K = 2 RBNs. 'Garden of Eden' (GoE) states are nodes on an SSN that have in-degree zero. While in-degrees of non-GoE nodes for K > 1 SSNs can assume any integer value between 0 and 2 N , for K = 1 all the non-GoE nodes in a given SSN have the same in-degree which is always a power of two

  20. Distinguishability of quantum states and shannon complexity in quantum cryptography

    Science.gov (United States)

    Arbekov, I. M.; Molotkov, S. N.

    2017-07-01

    The proof of the security of quantum key distribution is a rather complex problem. Security is defined in terms different from the requirements imposed on keys in classical cryptography. In quantum cryptography, the security of keys is expressed in terms of the closeness of the quantum state of an eavesdropper after key distribution to an ideal quantum state that is uncorrelated to the key of legitimate users. A metric of closeness between two quantum states is given by the trace metric. In classical cryptography, the security of keys is understood in terms of, say, the complexity of key search in the presence of side information. In quantum cryptography, side information for the eavesdropper is given by the whole volume of information on keys obtained from both quantum and classical channels. The fact that the mathematical apparatuses used in the proof of key security in classical and quantum cryptography are essentially different leads to misunderstanding and emotional discussions [1]. Therefore, one should be able to answer the question of how different cryptographic robustness criteria are related to each other. In the present study, it is shown that there is a direct relationship between the security criterion in quantum cryptography, which is based on the trace distance determining the distinguishability of quantum states, and the criterion in classical cryptography, which uses guesswork on the determination of a key in the presence of side information.

  1. State analysis requirements database for engineering complex embedded systems

    Science.gov (United States)

    Bennett, Matthew B.; Rasmussen, Robert D.; Ingham, Michel D.

    2004-01-01

    It has become clear that spacecraft system complexity is reaching a threshold where customary methods of control are no longer affordable or sufficiently reliable. At the heart of this problem are the conventional approaches to systems and software engineering based on subsystem-level functional decomposition, which fail to scale in the tangled web of interactions typically encountered in complex spacecraft designs. Furthermore, there is a fundamental gap between the requirements on software specified by systems engineers and the implementation of these requirements by software engineers. Software engineers must perform the translation of requirements into software code, hoping to accurately capture the systems engineer's understanding of the system behavior, which is not always explicitly specified. This gap opens up the possibility for misinterpretation of the systems engineer's intent, potentially leading to software errors. This problem is addressed by a systems engineering tool called the State Analysis Database, which provides a tool for capturing system and software requirements in the form of explicit models. This paper describes how requirements for complex aerospace systems can be developed using the State Analysis Database.

  2. Minmax defense strategy for complex multi-state systems

    International Nuclear Information System (INIS)

    Hausken, Kjell; Levitin, Gregory

    2009-01-01

    This paper presents a general optimization methodology that merges game theory and multi-state system survivability theory. The defender has multiple alternatives of defense strategy that presumes separation and protection of system elements. The attacker also has multiple alternatives of its attack strategy based on a combination of different possible attack actions against different groups of system elements. The defender minimizes, and the attacker maximizes, the expected damage caused by the attack (taking into account the unreliability of system elements and the multi-state nature of complex series-parallel systems). The problem is defined as a two-period minmax non-cooperative game between the defender who moves first and the attacker who moves second. An exhaustive minmax optimization algorithm is presented based on a double-loop genetic algorithm for determining the solution. A universal generating function technique is applied for evaluating the losses caused by system performance reduction. Illustrative examples with solutions are presented

  3. Decaying states as complex energy eigenvectors in generalized quantum mechanics

    International Nuclear Information System (INIS)

    Sudarshan, E.C.G.; Chiu, C.B.; Gorini, V.

    1977-04-01

    The problem of particle decay is reexamined within the Hamiltonian formalism. By deforming contours of integration, the survival amplitude is expressed as a sum of purely exponential contributions arising from the simple poles of the resolvent on the second sheet plus a background integral along a complex contour GAMMA running below the location of the poles. One observes that the time dependence of the survival amplitude in the small time region is strongly correlated to the asymptotic behaviour of the energy spectrum of the system; one computes the small time behavior of the survival amplitude for a wide variety of asymptotic behaviors. In the special case of the Lee model, using a formal procedure of analytic continuation, it is shown that a complete set of complex energy eigenvectors of the Hamiltonian can be associated with the poles of the resolvent of the background contour GAMMA. These poles and points along GAMMA correspond to the discrete and the continuum states respectively. In this context, each unstable particle is associated with a well defined object, which is a discrete generalized eigenstate of the Hamiltonian having a complex eigenvalue, with its real and negative imaginary parts being the mass and half width of the particle respectively. Finally, one briefly discusses the analytic continuation of the scattering amplitude within this generalized scheme, and notes the appearance of ''redundant poles'' which do not correspond to discrete solutions of the modified eigenvalue problem

  4. Solid state photosensitive devices which employ isolated photosynthetic complexes

    Science.gov (United States)

    Peumans, Peter; Forrest, Stephen R.

    2009-09-22

    Solid state photosensitive devices including photovoltaic devices are provided which comprise a first electrode and a second electrode in superposed relation; and at least one isolated Light Harvesting Complex (LHC) between the electrodes. Preferred photosensitive devices comprise an electron transport layer formed of a first photoconductive organic semiconductor material, adjacent to the LHC, disposed between the first electrode and the LHC; and a hole transport layer formed of a second photoconductive organic semiconductor material, adjacent to the LHC, disposed between the second electrode and the LHC. Solid state photosensitive devices of the present invention may comprise at least one additional layer of photoconductive organic semiconductor material disposed between the first electrode and the electron transport layer; and at least one additional layer of photoconductive organic semiconductor material, disposed between the second electrode and the hole transport layer. Methods of generating photocurrent are provided which comprise exposing a photovoltaic device of the present invention to light. Electronic devices are provided which comprise a solid state photosensitive device of the present invention.

  5. Complex Analysis of Financial State and Performance of Construction Enterprises

    Directory of Open Access Journals (Sweden)

    Algirdas Krivka

    2015-12-01

    Full Text Available The paper analyses the financial state and performance of large constructions enterprises by applying financial indicators. As there is no one single decisive financial indicator enabling to objectively assess enterprise performance, the multi-criteria decision making (MCDM methods are applied with four groups of financial ratios (profitability, liquidity, solvency and asset turnover acting as evaluation criteria, while the alternatives assessed are two enterprises compared throughout the reference period of three years, also with the average indicator values of the whole construction sector. The weights of the criteria have been estimated by involving competent experts with chi-square test employed to check the degree of agreement of expert estimates. The research methodology contributes to the issue of complex evaluation of enterprise financial state and performance, while the result of the multi-criteria assessment – the ranking of enterprises and sector average with respect to financial state and performance – could be considered worth attention from business owners, potential investors, customers or other possible stakeholders.

  6. Conformational explosion: Understanding the complexity of short chain para-dialkylbenzene potential energy surfaces

    Science.gov (United States)

    Mishra, Piyush; Hewett, Daniel M.; Zwier, Timothy S.

    2018-05-01

    The single-conformation ultraviolet and infrared spectroscopy of three short-chain para-dialkylbenzenes (para-diethylbenzene, para-dipropylbenzene, and para-dibutylbenzene) is reported for the jet-cooled, isolated molecules. The present study builds off previous work on single-chain n-alkylbenzenes, where an anharmonic local mode Hamiltonian method was developed to account for stretch-bend Fermi resonance in the alkyl CH stretch region [D. P. Tabor et al., J. Chem. Phys. 144, 224310 (2016)]. The jet-cooled molecules are interrogated using laser-induced fluorescence (LIF) excitation, fluorescence dip infrared spectroscopy, and dispersed fluorescence. The LIF spectra in the S1 ← S0 origin region show a dramatic increase in the number of resolved transitions with increasing length of the alkyl chains, reflecting an explosion in the number of unique low-energy conformations formed when two independent alkyl chains are present. Since the barriers to isomerization of the alkyl chain are similar in size, this results in an "egg carton" shaped potential energy surface. A combination of electronic frequency shift and alkyl CH stretch infrared spectra is used to generate a consistent set of conformational assignments. Using these experimental techniques in conjunction with computational methods, subsets of origin transitions in the LIF excitation spectrum can be classified into different conformational families. Two conformations are resolved in para-diethylbenzene, seven in para-dipropylbenzene, and about nineteen in para-dibutylbenzene. These chains are largely independent of each other as there are no new single-chain conformations induced by the presence of a second chain. A cursory LIF excitation scan of para-dioctylbenzene shows a broad congested spectrum at frequencies consistent with interactions of alkyl chains with the phenyl π cloud.

  7. Flora of the State of Paraíba, Brazil: Loranthaceae Juss.

    Directory of Open Access Journals (Sweden)

    Gabriella Carla Leite de Vasconcelos

    2015-08-01

    Full Text Available The family Loranthaceae Juss., characterized by its parasitic habit, is rarely studied in Brazil. Current research provides a taxonomic survey of Loranthaceae in the State of Paraiba, northeastern Brazil, in which ten species belonging to four genera have been recorded: Passovia (one species, Psittacanthus (two species, Pusillanthus (one species and Struthanthus (six species. Struthanthus concinnus Mart. was found for the first time in the state of Paraíba. A key to the species identification and taxonomic descriptions is presented, with images, geographic distribution and host data.

  8. Conformational Explosion: Understanding the Complexity of the Para-Dialkylbenzene Potential Energy Surfaces

    Science.gov (United States)

    Mishra, Piyush; Hewett, Daniel M.; Zwier, Timothy S.

    2017-06-01

    This talk focuses on the single-conformation spectroscopy of small-chain para-dialkylbenzenes. This work builds on previous studies from our group on long-chain n-alkylbenzenes that identified the first folded structure in octylbenzene. The dialkylbenzenes are representative of a class of molecules that are common components of coal and aviation fuel and are known to be present in vehicle exhaust. We bring the molecules para-diethylbenzene, para-dipropylbenzene and para-dibutylbenzene into the gas phase and cool the molecules in a supersonic expansion. The jet-cooled molecules are then interrogated using laser-induced fluorescence excitation, fluorescence dip IR spectroscopy (FDIRS) and dispersed fluorescence. The LIF spectra in the S_{0}-S_{1} origin region show dramatic increases in the number of resolved transitions with increasing length of alkyl chains, reflecting an explosion in the number of unique low-energy conformations formed when two independent alkyl chains are present. Since the barriers to isomerization of the alkyl chain are similar in size, this results in an 'egg carton' shape to the potential energy surface. We use a combination of electronic frequency shift and alkyl CH stretch infrared spectra to generate a consistent set of conformational assignments.

  9. First case report of vesicular stomatitis in the State of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Inácio José Clementino

    2014-10-01

    Full Text Available The present report describes the first case of vesicular stomatitis in the State of Paraíba, Brazil. Records from the Official Veterinary Services of the State of Paraíba were analyzed while responding to a suspected case of vesicular disease at a property (property I in the municipality of Pombal in which the cattle showed clinical signs and lesions of vesicular disease. Surveillance in the surrounding area revealed similar lesions in cattle at two other properties (II and III. Based on these events, the suspicion was considered well founded, and samples were collected for evaluation at the National Agricultural Laboratory of the State of Pará. The property was interdicted, and those located within a 3 km radius (perifocal from the focus were inspected. At property I, 42.86% (6/14 of the cattle showed vesicular disease lesions characterized by intense sialorrhea, ruptured oral vesicles, epithelial detachment of the tongue and muzzle, and vesicular lesions in the udder and interdigital space. Similar lesions were detected in cattle at properties II and III, affecting 80.95% (34/42 and 11.54% (3/26 of the animals, respectively. Tissue samples collected from the three properties were positive for the vesicular stomatitis virus (Indiana 3 subtype. The properties were monitored for 21 days after the last infected animal was cured, and afterwards, the three properties were released.

  10. Plastic ingestion by sea turtles in Paraíba State, Northeast Brazil

    OpenAIRE

    Camila Poli; Daniel Oliveira Mesquita; Cinthia Saska; Rita Mascarenhas

    2015-01-01

    ABSTRACT Currently, plastics are recognized as a major pollutant of the marine environment, representing a serious threat to ocean wildlife. Here, we examined the occurrence and effects of plastic ingestion by sea turtles found stranded along the coast of Paraíba State, Brazil from August 2009 to July 2010. Ninety-eight digestive tracts were examined, with plastic found in 20 (20.4%). Sixty five percent (n = 13) of turtles with plastic in the digestive tract were green turtles (Chelonia mydas...

  11. Mew organometallic complexes of technetium in different oxidation states

    International Nuclear Information System (INIS)

    Joachim, J.E.

    1993-09-01

    New organometallic compounds of Tc(I), Tc(III) and Tc(VII) were synthesized and their properties examined. These compounds were correlated with their homologous compounds of manganese and rhenium, which were also synthesized by the same route. The molecular and crystal structures of most technetium complexes and of the homologous complexes of manganese and rhenium were determined by single crystal X-ray diffraction. (orig.) [de

  12. Complexity in Simplicity: Flexible Agent-based State Space Exploration

    DEFF Research Database (Denmark)

    Rasmussen, Jacob Illum; Larsen, Kim Guldstrand

    2007-01-01

    In this paper, we describe a new flexible framework for state space exploration based on cooperating agents. The idea is to let various agents with different search patterns explore the state space individually and communicate information about fruitful subpaths of the search tree to each other...

  13. Communal conflict, civil war, and the state: Complexities ...

    African Journals Online (AJOL)

    This article analyses communal conflict, which we define as violent conflict between non-state groups that are organised along a shared communal identity, and how such conflicts relate to state-based violence. We argue that a deeper understanding of communal conflicts, the different types of dynamics and conflict issues, ...

  14. Manipulating charge transfer excited state relaxation and spin crossover in iron coordination complexes with ligand substitution

    DEFF Research Database (Denmark)

    Zhang, Wenkai; Kjær, Kasper Skov; Alonso-Mori, Roberto

    2017-01-01

    iron complexes with four cyanide (CN-;) ligands and one 2,2′-bipyridine (bpy) ligand. This enables MLCT excited state and metal-centered excited state energies to be manipulated with partial independence and provides a path to suppressing spin crossover. We have combined X-ray Free-Electron Laser (XFEL...... state lifetime of iron based complexes due to spin crossover-the extremely fast intersystem crossing and internal conversion to high spin metal-centered excited states. We revitalize a 30 year old synthetic strategy for extending the MLCT excited state lifetimes of iron complexes by making mixed ligand...

  15. Hidden State Prediction: a modification of classic ancestral state reconstruction algorithms helps unravel complex symbioses

    Directory of Open Access Journals (Sweden)

    Jesse Robert Zaneveld

    2014-08-01

    Full Text Available Complex symbioses between animal or plant hosts and their associated microbiotas can involve thousands of species and millions of genes. Because of the number of interacting partners, it is often impractical to study all organisms or genes in these host-microbe symbioses individually. Yet new phylogenetic predictive methods can use the wealth of accumulated data on diverse model organisms to make inferences into the properties of less well-studied species and gene families. Predictive functional profiling methods use evolutionary models based on the properties of studied relatives to put bounds on the likely characteristics of an organism or gene that has not yet been studied in detail. These techniques have been applied to predict diverse features of host-associated microbial communities ranging from the enzymatic function of uncharacterized genes to the gene content of uncultured microorganisms. We consider these phylogenetically-informed predictive techniques from disparate fields as examples of a general class of algorithms for Hidden State Prediction (HSP, and argue that HSP methods have broad value in predicting organismal traits in a variety of contexts, including the study of complex host-microbe symbioses.

  16. Hidden state prediction: a modification of classic ancestral state reconstruction algorithms helps unravel complex symbioses.

    Science.gov (United States)

    Zaneveld, Jesse R R; Thurber, Rebecca L V

    2014-01-01

    Complex symbioses between animal or plant hosts and their associated microbiotas can involve thousands of species and millions of genes. Because of the number of interacting partners, it is often impractical to study all organisms or genes in these host-microbe symbioses individually. Yet new phylogenetic predictive methods can use the wealth of accumulated data on diverse model organisms to make inferences into the properties of less well-studied species and gene families. Predictive functional profiling methods use evolutionary models based on the properties of studied relatives to put bounds on the likely characteristics of an organism or gene that has not yet been studied in detail. These techniques have been applied to predict diverse features of host-associated microbial communities ranging from the enzymatic function of uncharacterized genes to the gene content of uncultured microorganisms. We consider these phylogenetically informed predictive techniques from disparate fields as examples of a general class of algorithms for Hidden State Prediction (HSP), and argue that HSP methods have broad value in predicting organismal traits in a variety of contexts, including the study of complex host-microbe symbioses.

  17. Complexity and Chaos - State-of-the-Art; Glossary

    Science.gov (United States)

    2007-09-01

    Companion to Philosophy defines emergent properties as unpredictable and irreducible: “a property of a complex system is said to be ‘emergent’ just in...Canada’s Leader in Defence and National Security Science and Technology Chef de file au Canada en matière de science et de technologie pour la

  18. MEAPA - Integrated methodology for alternative energy sources map pin in the State of Para - Brazil; MEAPA - Metodologias integradas para o mapeamento de energias alternativas no Estado do Para

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Claudio; Lopes, J. Pecas; Va, Kowk P.; Herold, Helmut [Instituto de Engenharia de Sistemas e Computadores (INESC), Porto (Portugal). Power System Unit. E-mail: cmonteiro@inescn.pt; Rocha, Brigida; Pinheiro, Helten; Rocha, Olavo [Para Univ., Belem, PA (Brazil). Dept. de Engenharia Eletrica. E-mail: rocha@interconect.com.br; Silva, Isa O. [Para Univ., Belem, PA (Brazil). Dept. de Meteorologia; Moraes, Sinfronio [Para Univ., Belem, PA (Brazil). Dept. de Mecanica

    1999-07-01

    This paper describes the MEAPA project for the development of methodologies which support the renewable energy sources integration in the Marajo island - Para - Brazil. The methodologies used will be described including the construction of a geographical database, renewable resources (wind, solar and biomass) mapping, transport costs, cost of electric power produced by various systems and electrification sceneries and comparison of electrification solutions.

  19. Dark excited states of carotenoid in light harvesting complex probing with femtosecond stimulated Raman spectroscopy

    Directory of Open Access Journals (Sweden)

    Sakai S.

    2013-03-01

    Full Text Available Vibrational dynamics of dark excited states in carotenoids have been investigated using tunable Raman pump pulses. The S1 state has same vibrational dynamics in light-harvesting complex (LH1 and solution. The S* state in LH1 has similar vibrational modes with the triplet state of carotenoid. However, the so-called S* state in solution does not have the modes and is concluded to be different from the S* state in LH1.

  20. Epidemic dynamics and endemic states in complex networks

    OpenAIRE

    Pastor-Satorras, Romualdo; Vespignani, Alessandro

    2001-01-01

    We study by analytical methods and large scale simulations a dynamical model for the spreading of epidemics in complex networks. In networks with exponentially bounded connectivity we recover the usual epidemic behavior with a threshold defining a critical point below which the infection prevalence is null. On the contrary, on a wide range of scale-free networks we observe the absence of an epidemic threshold and its associated critical behavior. This implies that scale-free networks are pron...

  1. State densities and spectrum fluctuations: Information propagation in complex nuclei

    International Nuclear Information System (INIS)

    French, J.B.; Kota, V.K.B.

    1988-01-01

    At excitation energies in nuclei where the state density is unambiguously defined there is a sharp separation between the smoothed spectrum (which defines the density) and fluctuations about it which have recently been studied with a view to understanding some aspects of quantum chaos. We briefly review these two complementary subjects, paying special attention to: the role of the effective interaction in determining the density; the calculation of interacting-particle state and level densities, and of expectation values of interesting operators; the information about the effective nucleon-nucleon interaction which is carried both by the density and the fluctuations. 28 refs., 1 fig

  2. Genetic characterization of Trypanosoma cruzi natural clones from the state of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Christian Barnabé

    2005-05-01

    Full Text Available Eighteen Trypanosoma cruzi stocks from the state of Paraíba, Brazil, isolated from man, wild mammals, and triatomine bugs were studied by multilocus enzyme electrophoresis and random primed amplified polymorphic DNA. Despite the low number of stocks, a notable genetic, genotypic, and phylogenetic diversity was recorded. The presence of the two main phylogenetic subdivisions, T. cruzi I and II, was recorded. The strong linkage disequilibrium observed in the population under survey suggests that T. cruzi undergoes predominant clonal evolution in this area too, although this result should be confirmed by a broader sample. The pattern of clonal variation does not suggests a recent origin by founder effect with a limited number of different genotypes.

  3. Mercury exposure in Munduruku Indians from the community of Sai Cinza, state of Para, Brazil

    International Nuclear Information System (INIS)

    Oliveira Santos, Elisabeth C. de; Maura de Jesus, Iracina; Camara, Volney e M.; Brabo, Edilson; Brito Loureiro, Edvaldo C.; Mascarenhas, Artur; Weirich, Judith; Ragio Luiz, Ronir; Cleary, David

    2002-01-01

    The objective of this cross-sectional study was to evaluate mercury exposure and health status among Munduruku Indians from the community of Sai inza, State of Para, Brazil. The population studied included 330 Indians, who submitted to a questionnaire, clinical exams, and collection of hair, blood, urine, and feces. Mercury was measured in hair and fish. Although no person was found to have overt mercury intoxication, the mean levels of mercury in hair were elevated (14.45 μg/g for children from 7 to 12 years ld, 15.70 μg/g for women between 14 and 44 years old, and 14.1 μg/g or the remaining population). Mercury levels in fish were below levels recommended by the World Health Organization, but rates of fish consumption ere high. These results place this indigenous population as a group under risk of mercury toxicity from the gold production

  4. Vascular flora of an inselberg in the state of Paraíba, in Northeast Brazil

    Directory of Open Access Journals (Sweden)

    Elisabeth Emília Augusta Dantas Tölke

    2011-12-01

    Full Text Available This study characterized the floristic composition of an inselberg in the Puxinanã municipality, of Paraíba, in Northeast Brazil. Ninety-seven species were recorded that belong to 35 families: Asteraceae (12 spp., Euphorbiaceae and Fabaceae (nine spp. each, Rubiaceae and Convolvulaceae (eight spp. each were the richest families, comprising 47.42% of the total species registered. The herbaceous habit was predominant, occurring in 39% of the species, followed by species of shrubs (22%, vines (20%, rupicolous plants (6%, subshrubs (5%, trees (4% and epiphytes (1%. Passiflora luetzelburgii Harms (Passifloraceae is a new record for the flora of the state. The data from this study provides information that could be used in the conservation and rational use of the study area, and contributes to what is known about the flora and vegetation of the Caatinga.

  5. Epidemic dynamics and endemic states in complex networks

    Science.gov (United States)

    Pastor-Satorras, Romualdo; Vespignani, Alessandro

    2001-06-01

    We study by analytical methods and large scale simulations a dynamical model for the spreading of epidemics in complex networks. In networks with exponentially bounded connectivity we recover the usual epidemic behavior with a threshold defining a critical point below that the infection prevalence is null. On the contrary, on a wide range of scale-free networks we observe the absence of an epidemic threshold and its associated critical behavior. This implies that scale-free networks are prone to the spreading and the persistence of infections whatever spreading rate the epidemic agents might possess. These results can help understanding computer virus epidemics and other spreading phenomena on communication and social networks.

  6. Epidemic dynamics and endemic states in complex networks

    International Nuclear Information System (INIS)

    Pastor-Satorras, Romualdo; Vespignani, Alessandro

    2001-01-01

    We study by analytical methods and large scale simulations a dynamical model for the spreading of epidemics in complex networks. In networks with exponentially bounded connectivity we recover the usual epidemic behavior with a threshold defining a critical point below that the infection prevalence is null. On the contrary, on a wide range of scale-free networks we observe the absence of an epidemic threshold and its associated critical behavior. This implies that scale-free networks are prone to the spreading and the persistence of infections whatever spreading rate the epidemic agents might possess. These results can help understanding computer virus epidemics and other spreading phenomena on communication and social networks

  7. Income inequality: A complex network analysis of US states

    Science.gov (United States)

    Gogas, Periklis; Gupta, Rangan; Miller, Stephen M.; Papadimitriou, Theophilos; Sarantitis, Georgios Antonios

    2017-10-01

    This study performs a long-run, inter-temporal analysis of income inequality in the US spanning the period 1916-2012. We employ both descriptive analysis and the Threshold-Minimum Dominating Set methodology from Graph Theory, to examine the evolution of inequality through time. In doing so, we use two alternative measures of inequality: the Top 1% share of income and the Gini coefficient. This provides new insight on the literature of income inequality across the US states. Several empirical findings emerge. First, a heterogeneous evolution of inequality exists across the four focal sub-periods. Second, the results differ between the inequality measures examined. Finally, we identify groups of similarly behaving states in terms of inequality. The US authorities can use these findings to identify inequality trends and innovations and/or examples to investigate the causes of inequality within the US and implement appropriate policies.

  8. Paleoenvironmental evolution based on benthic foraminifera biofacies of the Paraíba do Sul Deltaic Complex, eastern Brazil

    Science.gov (United States)

    Gasparini, Sarah Pereira; Vilela, Claudia Gutterres

    2017-12-01

    The paleoecology and distribution of benthic foraminiferal assemblages were analyzed in the core 2-MU-1-RJ well, drilled in the Paraíba do Sul Deltaic Complex, Rio de Janeiro (Brazil). An abundant assemblage was found in the upper portion of the well core, inferred to be pleistocenic deposits. The coastal dynamic was recognized from five biofacies based on clusters, the Planktonic/Benthic (P/B) ratios and indicator species distribution in the core. Several biofacies were identified along the core depending on the species dominance. From the bottom to the top of the core, the biofacies succession represents the environmental changes in the coastal area associated to sea-level oscillations. The biofacies ABP dominated by Ammonia parkinsoniana and Bolivina spp. and Pararotalia cananeiaensis represents an inner shelf environment; biofacies QP dominated by shelf miliolids species; biofacies PGH, dominated by P. cananeiaensis, Gavelinopsis praegeri, and Hanzawaia nitidula, represents the estuary complex with middle or outer shelf influence; biofacies QL represents hypersaline waters dominated by lagoonal miliolids; and biofacies HP characterized by Haynesina germanica and P. cananeiaensis is associated with paralic environments. Marine ingressions are recorded and those biofacies show the pleistocenic coastal hydrodinamic in the deltaic complex. The foraminiferal biofacies contribute with detailed information to sedimentary facies previously characterized in the study area by the reconstruction of paleoenvironment succession.

  9. Complexity and Chaos - State-of-the-Art; Formulations and Measures of Complexity

    Science.gov (United States)

    2007-09-01

    196] GREEN , DG. Syntactic modelling and simulation. Simulation, 1990, 54, 281-286. [197] GREEN , DG. Emergent Behaviour in Biological...Systems. In GREEN , DG; BOSSOMAIER, TJ (Eds). Complex Systems - From Biology to Computation. Amsterdam: OS Press, 1993, 24-35. [198] GREENBERG, WJ. A...Transactions on Systems, Man and Cybernetics, 1989, 19, 1073-1077. [369] RAMSEY, FP. The foundations of mathematics. London: Routledge & Kegan Paul, 1950

  10. Tuberculose bovina no Estado da Paraíba: estudo retrospectivo Bovine tuberculosis in the state of Paraíba: retrospective survey

    Directory of Open Access Journals (Sweden)

    Salomão M. Figueiredo

    2010-09-01

    Full Text Available O objetivo do presente trabalho foi determinar a frequência de propriedades positivas (focos e de animais positivos para a tuberculose bovina no Estado da Paraíba. Foram utilizados dados da Agência de Defesa Agropecuária do Estado, coletados de suas 23 microrregiões, durante o período de janeiro de 2008 a julho de 2009. Durante esse período, foram examinadas 10.963 propriedades e 54.472 bovinos foram submetidos ao teste de tuberculinização. Para o diagnóstico foi utilizada, como prova de triagem, a tuberculinização cervical simples para gado de leite e a tuberculinização na prega caudal para gado de corte; como prova confirmatória foi utilizada a tuberculinização cervical comparativa. Uma propriedade foi considerada foco quando apresentou pelo menos um animal soropositivo. Das propriedades investigadas, 62 (0,57% apresentaram pelo menos um animal positivo e dos animais analisados, 136 (0,25% foram positivos. Houve diferença significativa (pThe aim of this study was to determine the frequency of positive herds (foci and positive animals for bovine tuberculosis in the state of Paraíba, Northeast region of Brazil. Data from the Agency of Agricultural Protection in the state, collected from its 23 microregions, during the January 2008 to July 2009 period, were used. During this period, 10,963 herds were examined and 54,472 cattle were submitted to the tuberculin test. For diagnosis the cervical and caudal-fold tuberculin tests were used as screening tests in dairy and beef cattle, respectively; as confirmatory test, comparative cervical test was used. A herd was considered focus when presented at least one positive animal. Of the herds investigated, 62 (0.57% had at least one positive animal, and of the animals examined, 136 (0.25% were positive. There was significant difference (p<0.001 in the proportion of positivity for females (0.32% and males (0.04%. Despite low frequency of foci of brucellosis and seropositive animals, it is

  11. Application of Bipartite Entangled States to Quantum Mechanical Version of Complex Wavelet Transforms

    International Nuclear Information System (INIS)

    Fan Hongyi; Lu Hailiang; Xu Xuefen

    2006-01-01

    We introduce the bipartite entangled states to present a quantum mechanical version of complex wavelet transform. Using the technique of integral within an ordered product of operators we show that the complex wavelet transform can be studied in terms of various quantum state vectors in two-mode Fock space. In this way the creterion for mother wavelet can be examined quantum-mechanically and therefore more deeply.

  12. Modelling of Octahedral Manganese II Complexes with Inorganic Ligands: A Problem with Spin-States

    Directory of Open Access Journals (Sweden)

    Ludwik Adamowicz

    2003-08-01

    Full Text Available Abstract: Quantum mechanical ab initio UHF, MP2, MC-SCF and DFT calculations with moderate Gaussian basis sets were performed for MnX6, X = H2O, F-, CN-, manganese octahedral complexes. The correct spin-state of the complexes was obtained only when the counter ions neutralizing the entire complexes were used in the modelling at the B3LYP level of theory.

  13. Quantum Query Complexity for Searching Multiple Marked States from an Unsorted Database

    International Nuclear Information System (INIS)

    Shang Bin

    2007-01-01

    An important and usual sort of search problems is to find all marked states from an unsorted database with a large number of states. Grover's original quantum search algorithm is for finding single marked state with uncertainty, and it has been generalized to the case of multiple marked states, as well as been modified to find single marked state with certainty. However, the query complexity for finding all multiple marked states has not been addressed. We use a generalized Long's algorithm with high precision to solve such a problem. We calculate the approximate query complexity, which increases with the number of marked states and with the precision that we demand. In the end we introduce an algorithm for the problem on a 'duality computer' and show its advantage over other algorithms.

  14. Mineralogical and geochemical aspects of nickeliferous laterite of Vermelho region, Serra dos Carajas (State of Para)

    International Nuclear Information System (INIS)

    Almeida Correa, S.L. de.

    1982-01-01

    Mineralogical and geochemical studies were carried out on the nickeliferous laterite of Vermelho region (Serra of Carajas, state of Para). A total of 64 samples were analysed by X-ray fluorescence analysis and atomic absorption, spectrophotometry, including bed-rock specimens. The laterite is derived from ultramafic rocks (serpentinites) and there horizons were recognized towards the top: saprolitic horizon with a thickness of more than 4 meters, clay horizon 6,1 meters thick and limonitic horizon with a thickness of 8,3 meters. The process of weathering affected both major and trace elements which were bleached, transported and reprecipitated. This caused variations in the concentration of the elements with depth, except for magnesium which was extensively bleached. Nickel concentrations in the clay horizon probably was a result of ion exchange between smectite and Ni-bearing solutions, the source of this Ni being goethite. Cobalt and zinc were also strongly enriched during the process of laterization, although maximum concentrations of these elements are found in different horizons. (author)

  15. Anti-Leptospira spp. antibodies in captive animals in Paraíba State

    Directory of Open Access Journals (Sweden)

    Arthur Brasil

    2013-12-01

    Full Text Available The aim of this survey was to verify the occurrence of anti-Leptospira spp. antibodies in captive animals in the Parque Zoobotânico Arruda Câmara, João Pessoa, Paraíba State, Northeastern Brazil. Blood samples were collected from 49 animals: 26 mammals of the species Sapajus libidinosus, Cebus flavius, Saimiri sciureu, Coendu sp., Pseudalopex vetulus, Leopardus pardalis, Leopardus tigrinus, Galactitis vitata, Eira barbara, Nasua nasua, Tayassu tajacu and Ratus norvegicus; 10 birds of the species Penelope jacucaca, Pavo cristatus, Anodorhynchus hyacinthinus, Ara chlorothpterus, Pionites leucogaster, Polyborus plancus, Geranoaetus melanoleucus and Urubitinga urubitinga; and 13 reptiles of the species Caiman latirostris, Paleosuchus trigonatus, Caiman crocodilus, Tupinabis merinae, Tupinambis teguixin, Boa constrictor, Corallus hortulanus, Python molurus, Bufocephala vanderhaegei, Geochelone denticulata and Geochelone carboraria. Sera were examined by the microscopic agglutination teste (MAT using 24 serovars as antigens and cut-off point of 1:100. One ocelot (Leopardo pardalis presented positive reaction for the Icterohaemorrhagiae serovar with titer of 100, however, it did not show any clinical sign of the infection. Sinantropic rodents are the main reservoirs of this serovar, which suggests the need of maintenance and continuous evaluation of rodent control programs.

  16. Cost of paricá wood production in Paragominas region, Para State, Brazil

    Directory of Open Access Journals (Sweden)

    Rafaela da Silveira

    2017-12-01

    Full Text Available The silvicultural and economic potential of paricá (Schizolobium amazonicum has encouraged the expansion of this crop, mainly in the northern region of the country, provoking the need for studies on the species. The objective of this study was to estimate paricá production in Paragominas region, Para State, Brazil, at 5, 6 and 7 years, in three classes of productivity considering five plant arrangements, being identified the main costs of production, in addition to those most affected by plant arrangements. The volumetric estimation was obtained by modeling in population level and the analysis of the costs, through the methodology of the operational cost. It was possible to infer that the arrangement of plants 3 m x 2 m was superior in volume, compared to the other analyzed plant arrangements. The effective operating cost represented on average 65% of the total production costs. Transport was the most significant individual cost, in all analyzed plant arrangements. The maintenance, among the set of activities, was the most significant in planting, fact that may be related to the number and the long period for the activities execution. Smaller plant arrangements presented the higher total costs of production, depending or not on the remuneration for the use of the permanent and current capital.

  17. Plastic ingestion by sea turtles in Paraíba State, Northeast Brazil

    Directory of Open Access Journals (Sweden)

    Camila Poli

    2015-09-01

    Full Text Available ABSTRACT Currently, plastics are recognized as a major pollutant of the marine environment, representing a serious threat to ocean wildlife. Here, we examined the occurrence and effects of plastic ingestion by sea turtles found stranded along the coast of Paraíba State, Brazil from August 2009 to July 2010. Ninety-eight digestive tracts were examined, with plastic found in 20 (20.4%. Sixty five percent (n = 13 of turtles with plastic in the digestive tract were green turtles (Chelonia mydas, 25% (n = 5 were hawksbills (Eretmochelys imbricata, and 10% (n = 2 were olive ridley (Lepidochelys olivacea. More plastic was found in the intestine (85% than in other parts of the gastrointestinal tract. We observed complete blockage of the gastrointestinal tract due to the presence of plastic in 13 of the 20 turtles that had ingested plastic. No correlation was found between the curved carapace length (CCL and the number or mass of the plastic ingested items. Significant differences were found between the intake of hard and soft plastic and the ingestion of white/transparent and colored plastic, with soft and white/transparent plastics being more commonly ingested. This study reveals the serious problem of plastic pollution to sea turtles at the area.

  18. Geology and geochronology of Mata Surrao granites - South-West of Rio Maria - Para State, Brazil

    International Nuclear Information System (INIS)

    Duarte, K.D.; Pereira, E.D.; Dall'Agnol, R.; Lafon, J.M.

    1991-01-01

    This paper summarize the preliminary data about a geological mapping on the scale 1:50.000 located at an area in the southeastern part of the Para State. The recognized units comprise the Mata Surrao granite, which is within the typical Archean Granite-Greenstone Terrain of Rio Maria, and has mainly a monzogranitic composition. Its foliation is restricted to the north and east borders. The mapped host rocks are represented by Tonalitic Ortho gneisses, Gneisses with Pegmatites, Migmatite Gneisses, both latter show different deformation rates. Rb/Sr on whole rock systematics had been applied for the Mata Surrao granite and yield an age of 2541 ± 74 Ma with Sr initial ratio of 0.71040 ± 343 (MSWD = 2.81). This data revealed another Archean granitic body (strictu sensu) related to the Rio Maria Granite-Greenstone Terrain. Such age can be interpreted either as the crystallization age of this granitic body, or a renewed one caused by the thermo tectonic event that affected the region at the end of Archean time. It can be deduced from the initial ratio that an important crustal contribution controlled the Mata Surrao granite genesis. (author)

  19. Moessbauer spectroscopy-nuclear hyperfine technique for studying dynamic chemical states of iron complexes

    International Nuclear Information System (INIS)

    Maeda, Y.

    2005-01-01

    A brief introduction of Moessbauer spectroscopy will be presented, followed by a discussion of the Moessbauer parameters, isomer shifts, quadrupole splittings, and spectral shapes of complexes in the presence of relaxation of the electronic states of the iron atoms. The usefulness of Moessbauer spectroscopy to demonstrate the dynamic phenomena of electronic states will be discussed in this lecture. (1) The Moessbauer spectra of mixed valence dinuclear and trinuclear iron complexes will be discussed in connection with the chemical structure of the complexes: The values of the quadrupole splittings and isomer shifts of [Fe II Fe III (bpmp) (ppa) 2 ](BF 4 ) 2 increase on raising the temperature, where Hbpmp represents 2,6-bis[bis(2- pyridylmethyl)aminoethyl]-4-methylphenol and ppa is 3-n-phenylpropionic acid. The spectra can be accounted for by postulating intramolecular electron exchange between two energetically inequivalent vibronic states Fe A 2+ Fe B 3+ and Fe A 3+ Fe B 2+ : The apparent time averaged valence states of the iron atoms are 2.2 and 2.8 on the Moessbauer time scale at 293 K. (2) The Moessbauer spectra of iron(III) spin-crossover complexes will be discussed in connection with the spin-transition rate and chemical structure of the complexes. The Moessbauer spectra of spin-crossover iron(III) complexes with LIESST (Light Induced Electronic Spin-State Transition) and of metallomesogens will be discussed to illustrate the extension of this research area by the use of Moessbauer spectroscopy.

  20. Water supply diagnosis in the municipality of Cajazeiras, Paraíba State, Brazil

    Directory of Open Access Journals (Sweden)

    José Adalberto da Silva Filho

    2016-04-01

    Full Text Available The water supply is a key factor for the development of the population in a region. The mapping areas that are not supplied with drinking water is an important mechanism, once the vulnerable locations are identified, which leads to establish policies and programs to mitigate the problem. Thus, this paper aims at examining areas that present vulnerability in access to water in the municipality of Cajazeiras, Paraíba State, Brazil. In order to carry this research out, data from the Brazilian Institute of Geography and Statistics were analyzed. The results indicate a disproportion in access to water between rural and urban areas, with the first being very vulnerable to contamination factors. It is necessary environmental education programs for sustainable water use, the development of technologies to ensure good quality water and the well being of the people, by the high risk of water-related diseases caused by the contamination that may occur in capture, transport and storage of water. Diagnóstico do abastecimento de água no município de Cajazeiras – PB, BrasilResumo: O abastecimento de água é um fator determinante para o desenvolvimento da população em uma região. O mapeamento de zonas que não são abastecidos com água potável é um mecanismo importante, uma vez que são identificadas as localidades que apresentam vulnerabilidade, sendo assim possível estabelecer políticas e programas que amenizem a problemática. Dessa forma, o presente trabalho tem por objetivo analisar as zonas que apresentam vulnerabilidade no acesso à água no município de Cajazeiras - PB, por meio de dados obtidos junto ao Instituto Brasileiro de Geografia e Estatística. Os resultados indicam uma desproporcionalidade no acesso à água entre as zonas rurais e urbanas, sendo a primeira muito vulnerável a fatores de contaminação. Dessa forma, faz-se necessário programas de educação ambiental para o uso sustentável da água, como também o

  1. The Importance of the Oil and Gas Complex for the Brazilian Economy and Its States

    OpenAIRE

    Guilhoto, Joaquim Jose Martins; Ichihara, Silvio Massaru; Postali, Fernando Antonio Slaibe

    2006-01-01

    This paper presents the results of a research conducted to measure the importance of the oil and gas complex in the Brazilian economy and in its states. Initially, the efforts were concentrated in the construction of an interregional input-output system for the 27 states of the Brazilian economy at the level of 42 industries, for the year of 2002. Using this system it was possible to make an analysis of role played by the oil and gas complex in the Brazilian economy and its states. First it i...

  2. Tracking excited-state charge and spin dynamics in iron coordination complexes

    DEFF Research Database (Denmark)

    Zhang, Wenkai; Alonso-Mori, Roberto; Bergmann, Uwe

    2014-01-01

    to spin state, can elucidate the spin crossover dynamics of [Fe(2,2'-bipyridine)(3)](2+) on photoinduced metal-to-ligand charge transfer excitation. We are able to track the charge and spin dynamics, and establish the critical role of intermediate spin states in the crossover mechanism. We anticipate......Crucial to many light-driven processes in transition metal complexes is the absorption and dissipation of energy by 3d electrons(1-4). But a detailed understanding of such non-equilibrium excited-state dynamics and their interplay with structural changes is challenging: a multitude of excited...... states and possible transitions result in phenomena too complex to unravel when faced with the indirect sensitivity of optical spectroscopy to spin dynamics(5) and the flux limitations of ultrafast X-ray sources(6,7). Such a situation exists for archetypal poly-pyridyl iron complexes, such as [Fe(2...

  3. Analysis of Pilot Feedback Regarding the Use of State Awareness Technologies During Complex Situations

    Science.gov (United States)

    Evans, Emory; Young, Steven D.; Daniels, Taumi; Santiago-Espada, Yamira; Etherington, Tim

    2016-01-01

    A flight simulation study was conducted at NASA Langley Research Center to evaluate flight deck systems that (1) predict aircraft energy state and/or autoflight configuration, (2) present the current state and expected future state of automated systems, and/or (3) show the state of flight-critical data systems in use by automated systems and primary flight instruments. Four new technology concepts were evaluated vis-à-vis current state-of-the-art flight deck systems and indicators. This human-in-the-loop study was conducted using commercial airline crews. Scenarios spanned a range of complex conditions and several emulated causal factors and complexity in recent accidents involving loss of state awareness by pilots (e.g. energy state, automation state, and/or system state). Data were collected via questionnaires administered after each flight, audio/video recordings, physiological data, head and eye tracking data, pilot control inputs, and researcher observations. This paper strictly focuses on findings derived from the questionnaire responses. It includes analysis of pilot subjective measures of complexity, decision making, workload, situation awareness, usability, and acceptability.

  4. Kinetics of phosphorus sorption in soils in the state of Paraíba¹

    Directory of Open Access Journals (Sweden)

    Hemmannuella Costa Santos

    2011-08-01

    Full Text Available The soil P sorption capacity has been studied for many years, but little attention has been paid to the rate of this process, which is relevant in the planning of phosphate fertilization. The purpose of this experiment was to assess kinetics of P sorption in 12 representative soil profiles of the State of Paraíba (Brazil, select the best data fitting among four equations and relate these coefficients to the soil properties. Samples of 12 soils with wide diversity of physical, chemical and mineralogical properties were agitated in a horizontal shaker, with 10 mmo L-1 CaCl2 solution containing 6 and 60 mg L-1 P, for periods of 5, 15, 30, 45, 60, 90, 120, 420, 720, 1,020, and 1,440 min. After each shaking period, the P concentration in the equilibrium solution was measured and three equations were fitted based on the Freundlich equation and one based on the Elovich equation, to determine which soil had the highest sorption rate (kinetics and which soil properties correlated to this rate. The kinetics of P sorption in soils with high maximum P adsorption capacity (MPAC was fast for 30 min at the lower initial P concentration (6 mg L-1. No difference was observed between soils at the higher initial P concentration (60 mg L-1. The P adsorption kinetics were positively correlated with clay content, MPAC and the amount of Al extracted with dithionite-citrate-bicarbonate. The data fitted well to Freundlich-based equations equation, whose coefficients can be used to predict P adsorption rates in soils.

  5. The nationalization of electricity supply and construction of large hydropower in Para State, Brazil; A estatizacao da oferta de energia eletrica e a construcao de grandes hidreletricas no estado do Para

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Marcos Vinicius Miranda da [Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Belem, PA (Brazil)], email: marcos.silva@pq.cnpq.br; Beltrao, Norma Ely Santos; Ferreira Filho, Helio; Oliveira, Renata Melo e Silva de; Penna, Heriberto Amanajas [Universidade Estadual do Para (UEPA), Belem, PA (Brazil)], emails: normaelybeltrao@gmail.com, hlio.ferreira@gmail.com, renata_ep@yahoo.com.br, heripena@yahoo.com.br

    2010-07-01

    The state of Para has the largest hydropower potential in Brazil, making it one of the main targets of electricity supply expansion policy. It is not only the existence of this potential that has created a favorable context for building of large hydroelectric dams in Para state, other factors also play important role. In this article will be analyzed one of these factors - the statization process of electricity supply in the country - and its influence on decision to build large hydroelectric dams in Para. It is observed that the state presence is an indispensable support to Brazilian electric system expansion policy that prioritizes the building of large hydropower to meet the energy demand in the country. This means that unless there is a change in the control of electric power supply, other large hydroelectric dams will be built in Para state, even taking into account the strong opposition on those generation plants. (author)

  6. Solid-state deep blue and UV fluorescent dyes based on para-bis(2-thienyl)phenylene

    Energy Technology Data Exchange (ETDEWEB)

    Krajčovič, Jozef; Kovalenko, Alexander, E-mail: kovalenko.alx@gmail.com; Heinrichová, Patricie; Vala, Martin; Weiter, Martin

    2015-11-15

    Despite the general rule of strong acceptor substituents having a tendency to quench fluorescence due to molecular stacking, it is shown how tetra-fluorination of the central phenylene unit of para-bis(2-thienyl)phenylene can augment the quantum yields of solid state fluorescent dyes. Another significant part of the present research was the study of the influence of the position of the solubilization alkyl chains position on the fluorescent properties of the abovementioned non- and tetra-fluorinated materials. Tenfold augmentation of quantum yields, depending on the position of the alkyl chains is reported. - Highlights: • Solid state luminescence was observed in para-bis(2-thienyl)phenylene molecules. • Quantum yields was augmented by polyfluorination of the central phenylene unit. • Tenfold augmentation of luminescence was observed by changing alkyls position. • Possibilities of steric hindrance and charge transfer were studied.

  7. Localized excitations in nonlinear complex systems current state of the art and future perspectives

    CERN Document Server

    Cuevas-Maraver, Jesús; Frantzeskakis, Dimitri; Karachalios, Nikos; Kevrekidis, Panayotis; Palmero-Acebedo, Faustino

    2014-01-01

    The study of nonlinear localized excitations is a long-standing challenge for research in basic and applied science, as well as engineering, due to their importance in understanding and predicting phenomena arising in nonlinear and complex systems, but also due to their potential for the development and design of novel applications. This volume is a compilation of chapters representing the current state-of-the-art on the field of localized excitations and their role in the dynamics of complex physical systems.

  8. Density of phonon states in the light-harvesting complex II of green plants

    CERN Document Server

    Pieper, J K; Irrgang, K D; Renger, G

    2002-01-01

    In photosynthetic antenna complexes, the coupling of electronic transitions to low-frequency vibrations of the protein matrix (phonons) plays an essential role in light absorption and ultra-fast excitation energy transfer (EET). The model calculations presented here indicate that inelastic neutron scattering experiments provide invaluable information on the phonon density of states for light-harvesting complex II, which may permit a consistent interpretation of contradictory results from high-resolution optical spectroscopy. (orig.)

  9. On a structural property in the state complexity of projected regular languages

    Czech Academy of Sciences Publication Activity Database

    Jirásková, G.; Masopust, Tomáš

    2012-01-01

    Roč. 449, Aug 31 (2012), s. 93-105 ISSN 0304-3975 R&D Projects: GA ČR(CZ) GPP202/11/P028 Institutional research plan: CEZ:AV0Z10190503 Institutional support: RVO:67985840 Keywords : projections * state complexity * descriptional complexity Subject RIV: BA - General Mathematics Impact factor: 0.489, year: 2012 http://www.sciencedirect.com/science/article/pii/S0304397512003532

  10. Comparison of holographic and field theoretic complexities for time dependent thermofield double states

    Science.gov (United States)

    Yang, Run-Qiu; Niu, Chao; Zhang, Cheng-Yong; Kim, Keun-Young

    2018-02-01

    We compute the time-dependent complexity of the thermofield double states by four different proposals: two holographic proposals based on the "complexity-action" (CA) conjecture and "complexity-volume" (CV) conjecture, and two quantum field theoretic proposals based on the Fubini-Study metric (FS) and Finsler geometry (FG). We find that four different proposals yield both similarities and differences, which will be useful to deepen our understanding on the complexity and sharpen its definition. In particular, at early time the complexity linearly increase in the CV and FG proposals, linearly decreases in the FS proposal, and does not change in the CA proposal. In the late time limit, the CA, CV and FG proposals all show that the growth rate is 2 E/(πℏ) saturating the Lloyd's bound, while the FS proposal shows the growth rate is zero. It seems that the holographic CV conjecture and the field theoretic FG method are more correlated.

  11. On the structure and spin states of Fe(III)-EDDHA complexes.

    Science.gov (United States)

    Gómez-Gallego, Mar; Fernández, Israel; Pellico, Daniel; Gutiérrez, Angel; Sierra, Miguel A; Lucena, Juan J

    2006-07-10

    DFT methods are suitable for predicting both the geometries and spin states of EDDHA-Fe(III) complexes. Thus, extensive DFT computational studies have shown that the racemic-Fe(III) EDDHA complex is more stable than the meso isomer, regardless of the spin state of the central iron atom. A comparison of the energy values obtained for the complexes under study has also shown that high-spin (S = 5/2) complexes are more stable than low-spin (S = 1/2) ones. These computational results matched the experimental results of the magnetic susceptibility values of both isomers. In both cases, their behavior has been fitted as being due to isolated high-spin Fe(III) in a distorted octahedral environment. The study of the correlation diagram also confirms the high-spin iron in complex 2b. The geometry optimization of these complexes performed with the standard 3-21G* basis set for hydrogen, carbon, oxygen, and nitrogen and the Hay-Wadt small-core effective core potential (ECP) including a double-xi valence basis set for iron, followed by single-point energy refinement with the 6-31G* basis set, is suitable for predicting both the geometries and the spin-states of EDDHA-Fe(III) complexes. The presence of a high-spin iron in Fe(III)-EDDHA complexes could be the key to understanding their lack of reactivity in electron-transfer processes, either chemically or electrochemically induced, and their resistance to photodegradation.

  12. Parameter and State Estimation of Large-Scale Complex Systems Using Python Tools

    Directory of Open Access Journals (Sweden)

    M. Anushka S. Perera

    2015-07-01

    Full Text Available This paper discusses the topics related to automating parameter, disturbance and state estimation analysis of large-scale complex nonlinear dynamic systems using free programming tools. For large-scale complex systems, before implementing any state estimator, the system should be analyzed for structural observability and the structural observability analysis can be automated using Modelica and Python. As a result of structural observability analysis, the system may be decomposed into subsystems where some of them may be observable --- with respect to parameter, disturbances, and states --- while some may not. The state estimation process is carried out for those observable subsystems and the optimum number of additional measurements are prescribed for unobservable subsystems to make them observable. In this paper, an industrial case study is considered: the copper production process at Glencore Nikkelverk, Kristiansand, Norway. The copper production process is a large-scale complex system. It is shown how to implement various state estimators, in Python, to estimate parameters and disturbances, in addition to states, based on available measurements.

  13. New Modeling of Steady-State Modes of Complex Electrical Grids of Power Systems

    Directory of Open Access Journals (Sweden)

    Akhmetbayev Arman

    2018-01-01

    Full Text Available Classical methods for modeling the steady-state modes of complex electrical networks and systems are based on the application of nonlinear node equations. Nonlinear equations are solved by iterative methods, which are connected by known difficulties. To a certain extent, these difficulties can be weakened by applying topological methods. In this paper, we outline the theoretical foundations for the formation of the inverse form of nodal stress equations based on the topology of electrical networks and systems. A new topological method for calculating the distribution coefficients of node currents is proposed based on all possible trees of a directed graph of a complex electrical network. A complex program for calculating current distribution coefficients and forming steady-state parameters in the MATLAB environment has been developed.

  14. Paleoenvironmental implications of early diagenetic siderites of the Paraíba do Sul Deltaic Complex, eastern Brazil

    Science.gov (United States)

    Rodrigues, Amanda Goulart; De Ros, Luiz Fernando; Neumann, Reiner; Borghi, Leonardo

    2015-06-01

    Abundant early diagenetic siderites occur as spherulites and rhombohedral microcrystalline and macrocrystalline crystals in the cores of the 2-MU-1-RJ well, drilled in the Paraíba do Sul Deltaic Complex, Rio de Janeiro (Brazil). The host sediments of the siderites are siliciclastic, hybrid, and carbonate deposits. Intense pedogenetic processes affected the siliciclastic sediments immediately after deposition, comprising clay illuviation, plants bioturbation, feldspar dissolution, and iron oxide/hydroxide precipitation. Siderite and pyrite are the main diagenetic constituents. The other diagenetic products are kaolinite, smectite, argillaceous and carbonate pseudomatrix, quartz overgrowths, diagenetic titanium minerals, jarosite, and iron oxides/hydroxides. Early diagenetic siderites were separated into four groups based on their elemental and stable isotopic composition, as well as on their paragenetic relationships with the other constituents and with the host sediments. Spherulitic to macrocrystalline siderites from group 1 are almost pure (average: 94.7 mol% FeCO3; 1.2 mol% MgCO3; 2.3 mol% CaCO3; 1.8 mol% MnCO3) and precipitated from meteoric porewaters in continental siliciclastic rocks under suboxic conditions (δ18Ovpdb values range in - 10.28 to - 5.57‰ and the δ13Cvpdb values in - 12.68 to - 4.33‰). Microcrystalline rhombohedral siderites from group 2 have zonation due to substantial Ca and Mg substitution (core average: 78.5 mol% FeCO3; 4.2 mol% MgCO3; 15.7 mol% CaCO3; 1.6 mol% MnCO3; edge average: 74.0 mol% FeCO3; 9.2 mol% MgCO3; 15.6 mol% CaCO3; 1.1 mol% MnCO3), and δ13Cvpdb and δ18Ovpdb values of + 0.17‰ and - 1.96‰, precipitated from marine porewaters in packstones/wackestones under methanogenic conditions. The group 3 is represented by irregular spherulitic siderites with moderate Ca and Mg substitutions (average: 80.2 mol% FeCO3; 7.9 mol% MgCO3; 11.3 mol% CaCO3; 0.6 mol% MnCO3), with δ18Ovpdb values ranging from - 5.96 to - 7.61‰ and

  15. Simple and complex chimera states in a nonlinearly coupled oscillatory medium

    Science.gov (United States)

    Bolotov, Maxim; Smirnov, Lev; Osipov, Grigory; Pikovsky, Arkady

    2018-04-01

    We consider chimera states in a one-dimensional medium of nonlinear nonlocally coupled phase oscillators. In terms of a local coarse-grained complex order parameter, the problem of finding stationary rotating nonhomogeneous solutions reduces to a third-order ordinary differential equation. This allows finding chimera-type and other inhomogeneous states as periodic orbits of this equation. Stability calculations reveal that only some of these states are stable. We demonstrate that an oscillatory instability leads to a breathing chimera, for which the synchronous domain splits into subdomains with different mean frequencies. Further development of instability leads to turbulent chimeras.

  16. The first example of intensive luminescence of LMCT state based on metal complexes in solution

    International Nuclear Information System (INIS)

    Lukova, G.V.; Vasil'ev, V.P.; Smirnov, V.A.; Huhn, W.

    2007-01-01

    A bridge complex rac-C 6 H 10 (IndH 4 ) 2 ZrC 2 , featuring a unique long-living luminescence in liquid solutions at 20 deg C, has been prepared for the first time by catalytic hydrogenation of bis-indinyl complex C 6 H 10 (Ind) 2 Zr 2 Cl 2 . It has been identified that quantum yields of luminescence of the complex solutions at room temperature are the greatest ones for the known compounds possessing emission states of charge transfer from ligand to metal. Linear correlations of quantum yield of metal complex luminescence in a solution with steric features of the solvent molecules have been detected for the first time [ru

  17. Single-molecule spectroscopy reveals photosynthetic LH2 complexes switch between emissive states.

    Science.gov (United States)

    Schlau-Cohen, Gabriela S; Wang, Quan; Southall, June; Cogdell, Richard J; Moerner, W E

    2013-07-02

    Photosynthetic organisms flourish under low light intensities by converting photoenergy to chemical energy with near unity quantum efficiency and under high light intensities by safely dissipating excess photoenergy and deleterious photoproducts. The molecular mechanisms balancing these two functions remain incompletely described. One critical barrier to characterizing the mechanisms responsible for these processes is that they occur within proteins whose excited-state properties vary drastically among individual proteins and even within a single protein over time. In ensemble measurements, these excited-state properties appear only as the average value. To overcome this averaging, we investigate the purple bacterial antenna protein light harvesting complex 2 (LH2) from Rhodopseudomonas acidophila at the single-protein level. We use a room-temperature, single-molecule technique, the anti-Brownian electrokinetic trap, to study LH2 in a solution-phase (nonperturbative) environment. By performing simultaneous measurements of fluorescence intensity, lifetime, and spectra of single LH2 complexes, we identify three distinct states and observe transitions occurring among them on a timescale of seconds. Our results reveal that LH2 complexes undergo photoactivated switching to a quenched state, likely by a conformational change, and thermally revert to the ground state. This is a previously unobserved, reversible quenching pathway, and is one mechanism through which photosynthetic organisms can adapt to changes in light intensities.

  18. Populations of excited states and reaction mechanisms in the emission of complex fragments

    International Nuclear Information System (INIS)

    Gomez del Campo, J.

    1990-01-01

    Cross sections for emission of complex fragments (Z>2) in their ground and excited states are presented for several heavy-ion reactions at bombarding energies above 10 MeV/nucleon. Data presented are mostly on the cross sections extracted by γ-ray techniques. It is shown that a simple statistical approach to associate the ratio, of cross sections for excited states and ground states, to the temperature of the emitter fails to give the expected temperatures. However, it is shown that this is mostly due to the fact that the fragments that γ decay are secondary fragments, produced by the particle decay of the primary emitted complex fragments. A Hauser-Feshbach analysis accounts well for the cross sections and extracted temperatures. 22 refs., 6 figs

  19. Equation of limiting plasticity of the metal upon complex stress state

    International Nuclear Information System (INIS)

    Tin'gaev, A.K.

    2002-01-01

    A method for evaluation of the limiting plasticity of the metal in the zones of complex 3D stress state is presented. An analytic equation is derived for limiting plasticity. Parameters of the equation are expresses through the standard characteristics of the mechanical properties determined upon static tension of the smooth sample. Introduced into the obtained analytical equation is a universal fracture constant which indirectly characterizes the state of the material from the point of view of its capacity for elastic overstrain relaxation in the form of plastic flow or fracture. The new equation makes it possible to estimate the limiting plasticity of the metal in a state of complex stress on the basis of traditional characteristics of mechanical properties, which are not difficult to determine [ru

  20. The use of zootherapeutics in folk veterinary medicine in the district of Cubati, Paraíba State, Brazil

    Directory of Open Access Journals (Sweden)

    da S Mourão José

    2007-09-01

    Full Text Available Abstract Background The present work addresses the use of zootherapy in folk veterinary medicine (ethnoveterinary by the residents of the municipal district of Cubati, microregion of Seridó, Paraíba State, Brazil. It sought to identify the principal animals used as medicinal sources for zootherapeutics and to contribute to the preservation and sustainability of this traditional knowledge. Methods Field research was undertaken on a weekly or biweekly basis during the period November, 2006, to January, 2007. Free, semi-structured, and open interviews were made with local residents of the municipal district of Cubati (in both urban and rural settings as well as with venders in public markets. A total of 25 individuals of both sexes were interviewed (with ages varying from 26 to 78 years although only 16 were finally chosen as informants as these people demonstrated the greatest degree of knowledge concerning zootherapeutics. Graphs and percentages were generated using Microsoft© Excel 2007 software, and the species were identified by photographic registration and subsequent bibliographical surveys. Results Mammals constitute the main medicinal zootherapeutic source for folk veterinary medicines in the studied area, both in terms of the total number of species used and the frequency of their citation. Sheep (Ovis aries, pigs (Sus scrofa, cattle (Bos taurus, and foxes (Cerdocyon thous were mentioned by 62.5, 43.75, 37.5, and 31.25% of the informants, respectively, as being used in folk veterinary medicine. Additionally, chameleons (Iguana iguana, chickens (Gallus domesticus, and rattlesnakes (Crotalus durissus were mentioned by 75, 43.75, and 31.25% of the informants, respectively. Relatively simple animal illnesses, such as furuncles, or injuries resulting from embedded thorns or skin eruptions are responsible for the largest number of zootherapeutic treatment, while, diseases of greater complexity, such as rabies and brucellosis, were not even

  1. Cation-mediated conversion of the state of charge in uranium arene inverted-sandwich complexes

    Energy Technology Data Exchange (ETDEWEB)

    Camp, Clement; Mougel, Victor; Pecaut, Jacques; Mazzanti, Marinella [Laboratoire de Reconnaissance Ionique et Chimie de Coordination, SCIB, UMR-E3 CEA-UJF, INAC, CEA-Grenoble (France); Maron, Laurent [LCPNO, CNRS and INSA, UPS, Universite de Toulouse (France)

    2013-12-16

    Two new arene inverted-sandwich complexes of uranium supported by siloxide ancillary ligands [K{U(OSi(OtBu)_3)_3}{sub 2}(μ-η{sup 6}:η{sup 6}-C{sub 7}H{sub 8})] (3) and [K{sub 2}{U(OSi(OtBu)_3)_3}{sub 2}(μ-η{sup 6}:η{sup 6}-C{sub 7}H{sub 8})] (4) were synthesized by the reduction of the parent arene-bridged complex [{U(OSi(OtBu)_3)_3}{sub 2}(μ-η{sup 6}:η{sup 6}-C{sub 7}H{sub 8})] (2) with stoichiometric amounts of KC{sub 8} yielding a rare family of inverted-sandwich complexes in three states of charge. The structural data and computational studies of the electronic structure are in agreement with the presence of high-valent uranium centers bridged by a reduced tetra-anionic toluene with the best formulation being U{sup V}-(arene{sup 4-})-U{sup V}, KU{sup IV}-(arene{sup 4-})-U{sup V}, and K{sub 2}U{sup IV}-(arene{sup 4-})-U{sup IV} for complexes 2, 3, and 4 respectively. The potassium cations in complexes 3 and 4 are coordinated to the siloxide ligands both in the solid state and in solution. The addition of KOTf (OTf=triflate) to the neutral compound 2 promotes its disproportionation to yield complexes 3 and 4 (depending on the stoichiometry) and the U{sup IV} mononuclear complex [U(OSi(OtBu){sub 3}){sub 3}(OTf)(thf){sub 2}] (5). This unprecedented reactivity demonstrates the key role of potassium for the stability of these complexes. (Copyright copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  2. Moments of generalized Husimi distributions and complexity of many-body quantum states

    International Nuclear Information System (INIS)

    Sugita, Ayumu

    2003-01-01

    We consider generalized Husimi distributions for many-body systems, and show that their moments are good measures of complexity of many-body quantum states. Our construction of the Husimi distribution is based on the coherent state of the single-particle transformation group. Then the coherent states are independent-particle states, and, at the same time, the most localized states in the Husimi representation. Therefore delocalization of the Husimi distribution, which can be measured by the moments, is a sign of many-body correlation (entanglement). Since the delocalization of the Husimi distribution is also related to chaoticity of the dynamics, it suggests a relation between entanglement and chaos. Our definition of the Husimi distribution can be applied not only to systems of distinguishable particles, but also to those of identical particles, i.e., fermions and bosons. We derive an algebraic formula to evaluate the moments of the Husimi distribution

  3. Structural oxidation state studies of the manganese cluster in the oxygen evolving complex of photosystem II

    Energy Technology Data Exchange (ETDEWEB)

    Liang, Wenchuan [Univ. of California, Berkeley, CA (United States)

    1994-11-01

    X-ray absorption spectroscopy (XAS) was performed on Photosystem II (PSII)-enriched membranes prepared from spinach to explore: (1) the correlation between structure and magnetic spin state of the Mn cluster in the oxygen evolving complex (OEC) in the S2 state; and (2) the oxidation state changes of the Mn cluster in the flash-induced S-states. The structure of the Mn cluster in the S2 state with the g~4 electron paramagnetic resonance (EPR) signal (S2-g4 state) was compared with that in the S2 state with multiline signal (S2-MLS state) and the S1 state. The S2-g4 state has a higher XAS inflection point energy than that of the S1 state, indicating the oxidation of Mn in the advance from the S1 to the S2-g4 state. Differences in the edge shape and in the extended X-ray absorption fine structure (EXAFS) show that the structure of the Mn cluster in the S2-g4 state is different from that in the S2-MLS or the S1 state. In the S2-g4 state, the second shell of backscatterers from the Mn absorber contains two Mn-Mn distances of 2.73 Å and 2.85 Å. Very little distance disorder exists in the second shell of the S1 or S2-MLS states. The third shell of the S2-g4 state at about 3.3 Å also contains increased heterogeneity relative to that of the S2-MLS or the S1 state. Various S-states were prepared at room-temperature by saturating, single-turnover flashes. The flash-dependent oscillation in the amplitude of the MLS was used to characterize the S-state composition and to construct "pure" S-state Mn K-edge spectra. The edge position shifts to higher energy by 1.8 eV upon the S1 → S2 transition.

  4. Reconfiguration of Brain Network Architectures between Resting-State and Complexity-Dependent Cognitive Reasoning.

    Science.gov (United States)

    Hearne, Luke J; Cocchi, Luca; Zalesky, Andrew; Mattingley, Jason B

    2017-08-30

    Our capacity for higher cognitive reasoning has a measurable limit. This limit is thought to arise from the brain's capacity to flexibly reconfigure interactions between spatially distributed networks. Recent work, however, has suggested that reconfigurations of task-related networks are modest when compared with intrinsic "resting-state" network architecture. Here we combined resting-state and task-driven functional magnetic resonance imaging to examine how flexible, task-specific reconfigurations associated with increasing reasoning demands are integrated within a stable intrinsic brain topology. Human participants (21 males and 28 females) underwent an initial resting-state scan, followed by a cognitive reasoning task involving different levels of complexity, followed by a second resting-state scan. The reasoning task required participants to deduce the identity of a missing element in a 4 × 4 matrix, and item difficulty was scaled parametrically as determined by relational complexity theory. Analyses revealed that external task engagement was characterized by a significant change in functional brain modules. Specifically, resting-state and null-task demand conditions were associated with more segregated brain-network topology, whereas increases in reasoning complexity resulted in merging of resting-state modules. Further increments in task complexity did not change the established modular architecture, but affected selective patterns of connectivity between frontoparietal, subcortical, cingulo-opercular, and default-mode networks. Larger increases in network efficiency within the newly established task modules were associated with higher reasoning accuracy. Our results shed light on the network architectures that underlie external task engagement, and highlight selective changes in brain connectivity supporting increases in task complexity. SIGNIFICANCE STATEMENT Humans have clear limits in their ability to solve complex reasoning problems. It is thought that

  5. Highly photoluminescent europium tetraphenylimidodiphosphinate ternary complexes with heteroaromatic co-ligands. Solution and solid state studies

    Energy Technology Data Exchange (ETDEWEB)

    Pietraszkiewicz, Marek, E-mail: mpietraszkiewicz@ichf.edu.pl [Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw (Poland); Pietraszkiewicz, Oksana; Karpiuk, Jerzy; Majka, Alina [Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw (Poland); Dutkiewicz, Grzegorz; Borowiak, Teresa [Adam Mickiewicz University, Faculty of Chemistry, Department of Crystallography, Grunwaldzka 6, 60-780 Poznań (Poland); Kaczmarek, Anna M. [L3–Luminescent Lanthanide Lab, f-element coordination chemistry, Ghent University, Department of Inorganic and Physical Chemistry, Krijgslaan 281, Building S3, 9000 Gent (Belgium); Van Deun, Rik, E-mail: rik.vandeun@ugent.be [L3–Luminescent Lanthanide Lab, f-element coordination chemistry, Ghent University, Department of Inorganic and Physical Chemistry, Krijgslaan 281, Building S3, 9000 Gent (Belgium)

    2016-02-15

    Tetraphenylimidodiphosphinate (tpip) forms neutral 3:1 complexes with lanthanide ions. These complexes can accommodate one ancillary planar heterocyclic ligand to complement their coordination sphere of Eu{sup 3+} to coordination number 8. Several co-ligands were tested to form new complexes: 1,10-phenanthroline, bathophenanthroline, 2,4,6-tris(2-pyridyl)-1,3,5-triazine, dipyrido[3,2-f:2′,3′-h]quinoxaline and 2,2′:6′,2′′-terpyridine. The addition of heterocyclic N,N-bidentate co-ligands to the coordination sphere results in a dramatic (by a factor of 45–50) luminescence enhancement of the parent Eu(tpip){sub 3}. The solid-state measurements confirmed that the ancillary ligands strongly increased the photoluminescence quantum yield (PLQY) of the investigated complexes. - Highlights: • We have disovered highly photoluminescent ternary Eu(III) complexes. • They consist of Eu(III) tetraphenylimidodiphosphinate, and planar heterocyclic ligands. • The increase in photoluminescence quantum yields in solution is enhanced up to 50 times in solution. • The solid-state photoluminescence exceeds 80% at room temperature.

  6. Highly photoluminescent europium tetraphenylimidodiphosphinate ternary complexes with heteroaromatic co-ligands. Solution and solid state studies

    International Nuclear Information System (INIS)

    Pietraszkiewicz, Marek; Pietraszkiewicz, Oksana; Karpiuk, Jerzy; Majka, Alina; Dutkiewicz, Grzegorz; Borowiak, Teresa; Kaczmarek, Anna M.; Van Deun, Rik

    2016-01-01

    Tetraphenylimidodiphosphinate (tpip) forms neutral 3:1 complexes with lanthanide ions. These complexes can accommodate one ancillary planar heterocyclic ligand to complement their coordination sphere of Eu 3+ to coordination number 8. Several co-ligands were tested to form new complexes: 1,10-phenanthroline, bathophenanthroline, 2,4,6-tris(2-pyridyl)-1,3,5-triazine, dipyrido[3,2-f:2′,3′-h]quinoxaline and 2,2′:6′,2′′-terpyridine. The addition of heterocyclic N,N-bidentate co-ligands to the coordination sphere results in a dramatic (by a factor of 45–50) luminescence enhancement of the parent Eu(tpip) 3 . The solid-state measurements confirmed that the ancillary ligands strongly increased the photoluminescence quantum yield (PLQY) of the investigated complexes. - Highlights: • We have disovered highly photoluminescent ternary Eu(III) complexes. • They consist of Eu(III) tetraphenylimidodiphosphinate, and planar heterocyclic ligands. • The increase in photoluminescence quantum yields in solution is enhanced up to 50 times in solution. • The solid-state photoluminescence exceeds 80% at room temperature.

  7. The activity state of the branched-chain 2-oxo acid dehydrogenase complex in rat tissues.

    OpenAIRE

    Wagenmakers, A J; Schepens, J T; Veldhuizen, J A; Veerkamp, J H

    1984-01-01

    An assay is described to define the proportion of the branched-chain 2-oxo acid dehydrogenase complex that is present in the active state in rat tissues. Activities are measured in homogenates in two ways: actual activities, present in tissues, by blocking both the kinase and phosphatase of the enzyme complex during homogenization, preincubation, and incubation with 1-14C-labelled branched-chain 2-oxo acid, and total activities by blocking only the kinase during the 5 min preincubation (neces...

  8. Photosynthetic complex LH2 – Absorption and steady state fluorescence spectra

    International Nuclear Information System (INIS)

    Zapletal, David; Heřman, Pavel

    2014-01-01

    Nowadays, much effort is devoted to the study of photosynthesis which could be the basis for an ideal energy source in the future. To be able to create such an energy source – an artificial photosynthetic complex, the first step is a detailed understanding of the function of photosynthetic complexes in living organisms. Photosynthesis starts with the absorption of a solar photon by one of the LH (light-harvesting) pigment–protein complexes and transferring the excitation energy to the reaction center where a charge separation is initiated. The geometric structure of some LH complexes is known in great detail, e.g. for the LH2 complexes of purple bacteria. For understanding of photosynthesis first stage efficiency, it is necessary to study especially optical properties of LH complexes. In this paper we present simulated absorption and steady-state fluorescence spectra for ring molecular system within full Hamiltonian model. Such system can model bacteriochlorophyll ring of peripheral light-harvesting complex LH2 from purple bacterium Rhodopseudomonas acidophila (Rhodoblastus acidophilus). Dynamic disorder (coupling with phonon bath) simultaneously with uncorrelated static disorder (transfer integral fluctuations) is used in our present simulations. We compare and discuss our new results with our previously published ones and of course with experimental data. - Highlights: • We model absorption and steady state fluorescence spectra for B850 ring from LH2. • Fluctuations of environment is modelled by static and dynamic disorder. • Full Hamiltonian model is compared with the nearest neighbour approximation one. • Simulated fluorescence spectrum is compared with experimental data

  9. The paleozoic of Amazonas basin south edge: Tapajos river, Para state; O paleozoico da borda sul da bacia do Amazonas: rio Tapajos, estado do Para

    Energy Technology Data Exchange (ETDEWEB)

    Matsuda, Nilo Siguehiko [Petrobras E e P, Rio de Janeiro, RJ (Brazil). Exploracao. Estratigrafia e Sedimentologia Geologia Aplicada a Exploracao], E-mail: nilo@petrobras.com.br; Winter, Wilson Rubem [Petrobras, Campoas dos Goytacases, RJ (Brazil). Exploracao. Sedimentologia e Estratigrafia], E-mail: winter@petrobras.com.br; Wanderley Filho, Joaquim Ribeiro; Cacela, Alessandra Suzely Moda [Petrobras, Manaus, AM (Brazil). Exploracao. Unidade de Operacoes de Exploracao e Producao da Amazonia], Emails: jwand@petrobras.com.br, alessandra.suzely@petrobras.com.br

    2009-11-15

    The intracratonic Amazonas Basin covers an area close to 500.000km{sup 2} shared between the Amazonas and Para states. The phanerozoic stratigraphic framework is up to 6.000m thick and may be subdivided into two, first order depositional sequences: the Paleozoic sequence, intruded by diabase dikes and sills and the Mesozoic-Cenozoic sequence. Analyzing the stratigraphic framework, the great tectonic influence on the basin development can be appreciated. The mainly NW-SE structural directions of the basement, which mark the boundaries of the geochronological provinces of the Amazonas, are clearly identified along the Tapajos River. The Paleozoic sequence outcrops on the southern border of the Amazonas Basin embraces potential source rocks, reservoirs and seal rocks. They can be subdivided in three, second order sequences, limited by regional unconformities, as: the Ordovician/Devonian, which corresponds to the Pitinga lithostratigraphic formation; the Devonian-Tournaisian, which corresponds to the Maecuru, Erere, Barreirinha and Curiri formations and, the Pensylvanian-Permian that are represented by the Monte Alegre and Itaituba formations. This field trip guide presents these classic lithostratigraphic outcrop units, together with a brief sedimentological description and an analysis of their positioning related to sequence stratigraphical concepts. (author)

  10. Charge transfer complex states in diketopyrrolopyrrole polymers and fullerene blends: Implications for organic solar cell efficiency

    Science.gov (United States)

    Moghe, D.; Yu, P.; Kanimozhi, C.; Patil, S.; Guha, S.

    2011-12-01

    The spectral photocurrent characteristics of two donor-acceptor diketopyrrolopyrrole (DPP)-based copolymers (PDPP-BBT and TDPP-BBT) blended with a fullerene derivative [6,6]-phenyl C61-butyric acid methyl ester (PCBM) were studied using Fourier-transform photocurrent spectroscopy (FTPS) and monochromatic photocurrent (PC) method. PDPP-BBT:PCBM shows the onset of the lowest charge transfer complex (CTC) state at 1.42 eV, whereas TDPP-BBT:PCBM shows no evidence of the formation of a midgap CTC state. The FTPS and PC spectra of P3HT:PCBM are also compared. The larger singlet state energy difference of TDPP-BBT and PCBM compared to PDPP-BBT/P3HT and PCBM obliterates the formation of a midgap CTC state resulting in an enhanced photovoltaic efficiency over PDPP-BBT:PCBM.

  11. Complex network analysis of resting-state fMRI of the brain.

    Science.gov (United States)

    Anwar, Abdul Rauf; Hashmy, Muhammad Yousaf; Imran, Bilal; Riaz, Muhammad Hussnain; Mehdi, Sabtain Muhammad Muntazir; Muthalib, Makii; Perrey, Stephane; Deuschl, Gunther; Groppa, Sergiu; Muthuraman, Muthuraman

    2016-08-01

    Due to the fact that the brain activity hardly ever diminishes in healthy individuals, analysis of resting state functionality of the brain seems pertinent. Various resting state networks are active inside the idle brain at any time. Based on various neuro-imaging studies, it is understood that various structurally distant regions of the brain could be functionally connected. Regions of the brain, that are functionally connected, during rest constitutes to the resting state network. In the present study, we employed the complex network measures to estimate the presence of community structures within a network. Such estimate is named as modularity. Instead of using a traditional correlation matrix, we used a coherence matrix taken from the causality measure between different nodes. Our results show that in prolonged resting state the modularity starts to decrease. This decrease was observed in all the resting state networks and on both sides of the brain. Our study highlights the usage of coherence matrix instead of correlation matrix for complex network analysis.

  12. Complex dynamics of a Holling type II prey-predator system with state feedback control

    International Nuclear Information System (INIS)

    Jiang Guirong; Lu Qishao; Qian Linning

    2007-01-01

    The complex dynamics of a Holling type II prey-predator system with impulsive state feedback control is studied in both theoretical and numerical ways. The sufficient conditions for the existence and stability of semi-trivial and positive periodic solutions are obtained by using the Poincare map and the analogue of the Poincare criterion. The qualitative analysis shows that the positive periodic solution bifurcates from the semi-trivial solution through a fold bifurcation. The bifurcation diagrams, Lyapunov exponents, and phase portraits are illustrated by an example, in which the chaotic solutions appear via a cascade of period-doubling bifurcations. The superiority of the state feedback control strategy is also discussed

  13. Steady-state and transient heat transfer through fins of complex geometry

    Directory of Open Access Journals (Sweden)

    Taler Dawid

    2014-06-01

    Full Text Available Various methods for steady-state and transient analysis of temperature distribution and efficiency of continuous-plate fins are presented. For a constant heat transfer coefficient over the fin surface, the plate fin can be divided into imaginary rectangular or hexangular fins. At first approximate methods for determining the steady-state fin efficiency like the method of equivalent circular fin and the sector method are discussed. When the fin geometry is complex, thus transient temperature distribution and fin efficiency can be determined using numerical methods. A numerical method for transient analysis of fins with complex geometry is developed. Transient temperature distributions in continuous fins attached to oval tubes is computed using the finite volume - finite element methods. The developed method can be used in the transient analysis of compact heat exchangers to calculate correctly the heat flow rate transferred from the finned tubes to the fluid.

  14. (13)C and (15)N solid-state NMR studies on albendazole and cyclodextrin albendazole complexes.

    Science.gov (United States)

    Ferreira, M João G; García, A; Leonardi, D; Salomon, Claudio J; Lamas, M Celina; Nunes, Teresa G

    2015-06-05

    (13)C and (15)N solid-state nuclear magnetic resonance (NMR) spectra were recorded from albendazole (ABZ) and from ABZ:β-cyclodextrin, ABZ:methyl-β-cyclodextrin, ABZ:hydroxypropyl-β-cyclodextrin and ABZ:citrate-β-cyclodextrin, which were prepared by the spray-drying technique. ABZ signals were typical of a crystalline solid for the pure drug and of an amorphous compound obtained from ABZ:cyclodextrin samples. Relevant spectral differences were correlated with chemical interaction between ABZ and cyclodextrins. The number and type of complexes revealed a strong dependence on the cyclodextrin group substituent. Solid-state NMR data were consistent with the presence of stable inclusion complexes. Copyright © 2015 Elsevier Ltd. All rights reserved.

  15. Untangling complex networks: risk minimization in financial markets through accessible spin glass ground states.

    Science.gov (United States)

    Lisewski, Andreas Martin; Lichtarge, Olivier

    2010-08-15

    Recurrent international financial crises inflict significant damage to societies and stress the need for mechanisms or strategies to control risk and tamper market uncertainties. Unfortunately, the complex network of market interactions often confounds rational approaches to optimize financial risks. Here we show that investors can overcome this complexity and globally minimize risk in portfolio models for any given expected return, provided the relative margin requirement remains below a critical, empirically measurable value. In practice, for markets with centrally regulated margin requirements, a rational stabilization strategy would be keeping margins small enough. This result follows from ground states of the random field spin glass Ising model that can be calculated exactly through convex optimization when relative spin coupling is limited by the norm of the network's Laplacian matrix. In that regime, this novel approach is robust to noise in empirical data and may be also broadly relevant to complex networks with frustrated interactions that are studied throughout scientific fields.

  16. A universal indicator of critical state transitions in noisy complex networked systems.

    Science.gov (United States)

    Liang, Junhao; Hu, Yanqing; Chen, Guanrong; Zhou, Tianshou

    2017-02-23

    Critical transition, a phenomenon that a system shifts suddenly from one state to another, occurs in many real-world complex networks. We propose an analytical framework for exactly predicting the critical transition in a complex networked system subjected to noise effects. Our prediction is based on the characteristic return time of a simple one-dimensional system derived from the original higher-dimensional system. This characteristic time, which can be easily calculated using network data, allows us to systematically separate the respective roles of dynamics, noise and topology of the underlying networked system. We find that the noise can either prevent or enhance critical transitions, playing a key role in compensating the network structural defect which suffers from either internal failures or environmental changes, or both. Our analysis of realistic or artificial examples reveals that the characteristic return time is an effective indicator for forecasting the sudden deterioration of complex networks.

  17. Untangling complex networks: Risk minimization in financial markets through accessible spin glass ground states

    Science.gov (United States)

    Lisewski, Andreas Martin; Lichtarge, Olivier

    2010-08-01

    Recurrent international financial crises inflict significant damage to societies and stress the need for mechanisms or strategies to control risk and tamper market uncertainties. Unfortunately, the complex network of market interactions often confounds rational approaches to optimize financial risks. Here we show that investors can overcome this complexity and globally minimize risk in portfolio models for any given expected return, provided the margin requirement remains below a critical, empirically measurable value. In practice, for markets with centrally regulated margin requirements, a rational stabilization strategy would be keeping margins small enough. This result follows from ground states of the random field spin glass Ising model that can be calculated exactly through convex optimization when relative spin coupling is limited by the norm of the network’s Laplacian matrix. In that regime, this novel approach is robust to noise in empirical data and may be also broadly relevant to complex networks with frustrated interactions that are studied throughout scientific fields.

  18. Syntheses and a Solid State Structure of a Dinuclear Molybdenum(V Complex with Pyridine

    Directory of Open Access Journals (Sweden)

    Jon Zubieta

    2010-01-01

    Full Text Available A mononuclear complex [MoOCl4(H2O]− readily forms a metal−metal bonded {Mo2O4}2+ core. A high content of pyridine in the reaction mixture prevents further aggregation of dinuclear cores into larger clusters and a neutral, dinuclear complex with the [Mo2O4Cl2(Py4] composition is isolated as a product. Solid state structures of two compounds containing this complex, [Mo2O4Cl2(Py4]·2.25Py (1 and [Mo2O4Cl2(Py4]·1.5PyHCl (2, were investigated by X-ray crystallography.

  19. A complex guided spectral transform Lanczos method for studying quantum resonance states

    International Nuclear Information System (INIS)

    Yu, Hua-Gen

    2014-01-01

    A complex guided spectral transform Lanczos (cGSTL) algorithm is proposed to compute both bound and resonance states including energies, widths and wavefunctions. The algorithm comprises of two layers of complex-symmetric Lanczos iterations. A short inner layer iteration produces a set of complex formally orthogonal Lanczos (cFOL) polynomials. They are used to span the guided spectral transform function determined by a retarded Green operator. An outer layer iteration is then carried out with the transform function to compute the eigen-pairs of the system. The guided spectral transform function is designed to have the same wavefunctions as the eigenstates of the original Hamiltonian in the spectral range of interest. Therefore the energies and/or widths of bound or resonance states can be easily computed with their wavefunctions or by using a root-searching method from the guided spectral transform surface. The new cGSTL algorithm is applied to bound and resonance states of HO, and compared to previous calculations

  20. Mechanisms of charge-state determination in hydrogen-based impurity complexes in crystalline germanium

    International Nuclear Information System (INIS)

    Oliva, J.

    1984-01-01

    Recent experiments suggest that hydrogen may become bound to, and then tunnel around, substitutional carbon, silicon, or oxygen impurities in crystalline germanium. All these complexes are electrically active; [H,C] and [H,Si] are shallow acceptors, while [H,O] is a shallow donor. This paper attempts to elucidate the basic physical mechanisms controlling the charge state of such complexes as a function of the choice of the substitutional atom. A minimal-basis Bethe-cluster approach is used with the cluster comprising the ten-atom tetrahedral cage (including the substitutional atom) and enclosed H site, the latter coupled to all ten atoms of the cage. The important local correlation effect which tends to favor single occupation of the H site is modeled with a Hubbard-type term at that site. The charge state of the [H,C], [H,Si], and [H,O] complexes is associated with double occupation of the H site. Four aspects of the model are involved in favoring double occupation: (1) a low value of the H-site energy, (2) a reduced local correlation effect at the H site, (3) small hybridization between the H site and cage, and (4) a low value of the substitutional-site energy relative to that of the host. Results for the charge state for H at the cage center and for H near the substitutional atom are discussed in detail. Several useful formal results for local self-energies and local Green's functions are presented

  1. NIETZSCHE: APOLO E O ESTADO PARA PROMOÇÃO DA CULTURA NIETZSCHE: APOLLO AND THE STATE IN CULTURE'S FOMENT

    Directory of Open Access Journals (Sweden)

    Adriana Delbó

    2008-09-01

    Full Text Available Os escritos de Nietzsche, contemporâneos a O nascimento da
    tragédia
    , esclarecem as preocupações do jovem filósofo com as condições políticas para uma verdadeira cultura. O par Apolo e Dionisio, opostos que se integram na religiosidade grega, como potências da natureza, resulta esteticamente na arte trágica, e politicamente em um Estado guerreiro. Assim Nietzsche atribui aos gregos a capacidade para a criação de cultura: arte, Estado e religião, unidos pela vontade artística da natureza, impulsionadora da vida de um povo.The Nietzsche’s writings of the period of The birth of tragedy informs
    about the young philosopher’s concerns with the requisite political
    conditions for a true culture. The pair Apollo and Dionysus, in opposition and harmonized in Greek religiosity, as powers of the nature, results aesthetically in the tragic art, and politically results in a warlike State. Nietzsche assigns to Greeks the capacity to create a culture: art, state and religion jointed by the artistic will of nature, which impels the life of a nation.

  2. Detecting critical state before phase transition of complex biological systems by hidden Markov model.

    Science.gov (United States)

    Chen, Pei; Liu, Rui; Li, Yongjun; Chen, Luonan

    2016-07-15

    Identifying the critical state or pre-transition state just before the occurrence of a phase transition is a challenging task, because the state of the system may show little apparent change before this critical transition during the gradual parameter variations. Such dynamics of phase transition is generally composed of three stages, i.e. before-transition state, pre-transition state and after-transition state, which can be considered as three different Markov processes. By exploring the rich dynamical information provided by high-throughput data, we present a novel computational method, i.e. hidden Markov model (HMM) based approach, to detect the switching point of the two Markov processes from the before-transition state (a stationary Markov process) to the pre-transition state (a time-varying Markov process), thereby identifying the pre-transition state or early-warning signals of the phase transition. To validate the effectiveness, we apply this method to detect the signals of the imminent phase transitions of complex systems based on the simulated datasets, and further identify the pre-transition states as well as their critical modules for three real datasets, i.e. the acute lung injury triggered by phosgene inhalation, MCF-7 human breast cancer caused by heregulin and HCV-induced dysplasia and hepatocellular carcinoma. Both functional and pathway enrichment analyses validate the computational results. The source code and some supporting files are available at https://github.com/rabbitpei/HMM_based-method lnchen@sibs.ac.cn or liyj@scut.edu.cn Supplementary data are available at Bioinformatics online. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  3. One Language for the United States? (Un Idioma para Los Estados Unidos?) CSG Backgrounder.

    Science.gov (United States)

    Ford, Mark L.

    The United States has become increasingly multilingual in recent decades, and while English is the most commonly spoken language, almost 11 percent of Americans prefer to speak another language at home. Bilingualism is promoted by governmental units at the federal, state, and local levels through a variety of programs, particularly in education…

  4. Macroscopic description of complex adaptive networks coevolving with dynamic node states

    Science.gov (United States)

    Wiedermann, Marc; Donges, Jonathan F.; Heitzig, Jobst; Lucht, Wolfgang; Kurths, Jürgen

    2015-05-01

    In many real-world complex systems, the time evolution of the network's structure and the dynamic state of its nodes are closely entangled. Here we study opinion formation and imitation on an adaptive complex network which is dependent on the individual dynamic state of each node and vice versa to model the coevolution of renewable resources with the dynamics of harvesting agents on a social network. The adaptive voter model is coupled to a set of identical logistic growth models and we mainly find that, in such systems, the rate of interactions between nodes as well as the adaptive rewiring probability are crucial parameters for controlling the sustainability of the system's equilibrium state. We derive a macroscopic description of the system in terms of ordinary differential equations which provides a general framework to model and quantify the influence of single node dynamics on the macroscopic state of the network. The thus obtained framework is applicable to many fields of study, such as epidemic spreading, opinion formation, or socioecological modeling.

  5. Particle hole excitations coupled to complex states in heavy-ion collisions

    International Nuclear Information System (INIS)

    Jolos, R.V.; Schmidt, R.

    1982-01-01

    The excitation of uncorrelated 1p-1h states in one nucleus due to the action of the time-dependent mean field of the other nucleus was studied earlier. No statistical assumptions or average procedures were made. Such a mechanism can be responsible for an appreciable excitation of the two nuclei during the short approach phase of the reaction (E* approximately> 100 MeV). The reversibility of the equations of motion leads to a deexcitation of the initially stored excitation energy into that of the relative motion for later times. This feedback behaviour of the internal excitation energy which results in particular to the deexcitation of high energetic 1p-1h pairs is probably not realistic due to the coupling of this states to more complex states with high density. It is studied the influence of this coupling due to the residual interaction between the nucleons on the dynamics of two colliding heavy ions

  6. Carotenoid deactivation in an artificial light-harvesting complex via a vibrationally hot ground state

    International Nuclear Information System (INIS)

    Savolainen, Janne; Buckup, Tiago; Hauer, Juergen; Jafarpour, Aliakbar; Serrat, Carles; Motzkus, Marcus; Herek, Jennifer L.

    2009-01-01

    Ultrafast relaxation of a carotenoid in an artificial light-harvesting complex has been studied by transient absorption spectroscopy. The transient signal amplitudes at several wavelengths as well as the amplitudes of the underlying species associated spectra (SAS) are analysed for several excitation energies ranging over more than two orders of magnitude (10 nJ/pulse up to 3000 nJ/pulse). Our analysis shows that the contribution from the so-called S* signal on the long-wavelength side of the first allowed S 0 → S 2 transition has a markedly different excitation energy dependence and saturation behaviour than the electronic excited state S 1 . These observations are modelled and explained in terms of a two-photon excitation of a vibrationally hot ground state via an impulsive stimulated Raman scattering (ISRS). The experimental observations of the varying pulse energy dependencies of different excited state species are supported by an analysis based on a density-matrix formalism

  7. Uranium occurences in the Gorotire Formation quartzites, state of Para, Brazil

    International Nuclear Information System (INIS)

    Santos, L.C.S. dos

    1984-01-01

    Seventeen anomalies aligned in a NW/SE structural direction coinciding with teh so called 'Serra do Matao, Southeast Para', were selected for ground-check purposes through the analysis and interpretation of the 'Projeto Geofisico Brasil-Canada' (Brazil-Canada Geophysical Project) results. The mineralized rock is an orthoquartzite with more than 95% silica, fine grained and extremely silicified, with sulphides (pyrite and galena). Uranium is present as fine uraninite crystals associated with the sulphides. It occurs in a disseminated fashion or in small veinlets protected form leaching by late silicification. The uranium appears to be syngenetic in origin being remobilized and reprecipitated as uraninite in veinlets. Values up to 5.800 ppm U 3 O 8 were detected with low values of thorium (usually less than 30 ppm). So far, within the studied areas, no promising targets have been found deserving further investments and investigations. (Author) [pt

  8. Litho stratigraphy of precambrian rocks in middle Xingu river basin -Altamira, Para state, Brazil

    International Nuclear Information System (INIS)

    Santos, M.V. dos; Sousa Filho, E.E. dos; Tassinari, C.C.G.

    1988-01-01

    The basement rocks from the Xingu river is divided into five litho stratigraphic units. They are broadly characterized by domains of ortho and para gneisses, volcano-sedimentary sequences, migmatites and by syntectonic and latetectonic granitoids. In addition acid to intermediate volcanics (Iriri formation) and several sub-volcanic granitic plutons (Maloquinha suite) also occur within the investigated area, as well as basic intrusions and minor arenous sediments covers, slightly metamorphosed. Geochronological studies carried out on the basement rocks and on the volcanics demonstrates an geologic evolution restricted to the trans Amazonian cycle (2.1 - 1.9 Ga). Sr isotopic evolution (high initial 87 Sr/ 86 Sr ratios) suggest that strong reworking of crustal material occurred at this time, in association with the tectonic evolution of the Maroni-Itacaiunas mobile belt related to the lower proterozoic, which borders the northern and northerneast part of the Archean central Amazonian province. (author)

  9. Dynamic study of excited state hydrogen-bonded complexes of harmane in cyclohexane-toluene mixtures.

    Science.gov (United States)

    Carmona, Carmen; Balón, Manuel; Galán, Manuel; Guardado, Pilar; Muñoz, María A

    2002-09-01

    Photoinduced proton transfer reactions of harmane or 1-methyl-9H-pyrido[3,4-b]indole (HN) in the presence of the proton donor hexafluoroisopropanol (HFIP) in cyclohexane-toluene mixtures (CY-TL; 10% vol/vol of TL) have been studied. Three excited state species have been identified: a 1:2 hydrogen-bonded proton transfer complex (PTC), between the pyridinic nitrogen of the substrate and the proton donor, a hydrogen-bonded cation-like exciplex (CL*) with a stoichiometry of at least 1:3 and a zwitterionic exciplex (Z*). Time-resolved fluorescence measurements evidence that upon excitation of ground state PTC, an excited state equilibrium is established between PTC* and the cationlike exciplex, CL*, lambdaem approximately/= 390 nm. This excited state reaction is assisted by another proton donor molecule. Further reaction of CL* with an additional HFIP molecule produces the zwitterionic species, Z*, lambda(em) approximately/= 500 nm. From the analysis of the multiexponential decays, measured at different emission wavelengths and as a function of HFIP concentration, the mechanism of these excited state reactions has been established. Thus, three rate constants and three reciprocal lifetimes have been determined. The simultaneous study of 1,9-dimethyl-9H-pyrido[3,4-b]indole (MHN) under the same experimental conditions has helped to understand the excited state kinetics of these processes.

  10. Charge-Transfer Dynamics in the Lowest Excited State of a Pentacene–Fullerene Complex: Implications for Organic Solar Cells

    KAUST Repository

    Joseph, Saju

    2017-10-02

    We characterize the dynamic nature of the lowest excited state in a pentacene/C60 complex on the femtosecond time scale, via a combination of ab initio molecular dynamics and time-dependent density functional theory. We analyze the correlations between the molecular vibrations of the complex and the oscillations in the electron-transfer character of its lowest excited state, which point to vibration-induced coherences between the (pentacene-based) local-excitation (LE) state and the complex charge-transfer (CT) state. We discuss the implications of our results on this model system for the exciton-dissociation process in organic solar cells.

  11. Engineering Complex Embedded Systems with State Analysis and the Mission Data System

    Science.gov (United States)

    Ingham, Michel D.; Rasmussen, Robert D.; Bennett, Matthew B.; Moncada, Alex C.

    2004-01-01

    It has become clear that spacecraft system complexity is reaching a threshold where customary methods of control are no longer affordable or sufficiently reliable. At the heart of this problem are the conventional approaches to systems and software engineering based on subsystem-level functional decomposition, which fail to scale in the tangled web of interactions typically encountered in complex spacecraft designs. Furthermore, there is a fundamental gap between the requirements on software specified by systems engineers and the implementation of these requirements by software engineers. Software engineers must perform the translation of requirements into software code, hoping to accurately capture the systems engineer's understanding of the system behavior, which is not always explicitly specified. This gap opens up the possibility for misinterpretation of the systems engineer s intent, potentially leading to software errors. This problem is addressed by a systems engineering methodology called State Analysis, which provides a process for capturing system and software requirements in the form of explicit models. This paper describes how requirements for complex aerospace systems can be developed using State Analysis and how these requirements inform the design of the system software, using representative spacecraft examples.

  12. Hurst Exponent Analysis of Resting-State fMRI Signal Complexity across the Adult Lifespan

    Directory of Open Access Journals (Sweden)

    Jianxin Dong

    2018-02-01

    Full Text Available Exploring functional information among various brain regions across time enables understanding of healthy aging process and holds great promise for age-related brain disease diagnosis. This paper proposed a method to explore fractal complexity of the resting-state functional magnetic resonance imaging (rs-fMRI signal in the human brain across the adult lifespan using Hurst exponent (HE. We took advantage of the examined rs-fMRI data from 116 adults 19 to 85 years of age (44.3 ± 19.4 years, 49 females from NKI/Rockland sample. Region-wise and voxel-wise analyses were performed to investigate the effects of age, gender, and their interaction on complexity. In region-wise analysis, we found that the healthy aging is accompanied by a loss of complexity in frontal and parietal lobe and increased complexity in insula, limbic, and temporal lobe. Meanwhile, differences in HE between genders were found to be significant in parietal lobe (p = 0.04, corrected. However, there was no interaction between gender and age. In voxel-wise analysis, the significant complexity decrease with aging was found in frontal and parietal lobe, and complexity increase was found in insula, limbic lobe, occipital lobe, and temporal lobe with aging. Meanwhile, differences in HE between genders were found to be significant in frontal, parietal, and limbic lobe. Furthermore, we found age and sex interaction in right parahippocampal gyrus (p = 0.04, corrected. Our findings reveal HE variations of the rs-fMRI signal across the human adult lifespan and show that HE may serve as a new parameter to assess healthy aging process.

  13. Metal-induced gap states in ferroelectric capacitors and its relationship with complex band structures

    Science.gov (United States)

    Junquera, Javier; Aguado-Puente, Pablo

    2013-03-01

    At metal-isulator interfaces, the metallic wave functions with an energy eigenvalue within the band gap decay exponentially inside the dielectric (metal-induced gap states, MIGS). These MIGS can be actually regarded as Bloch functions with an associated complex wave vector. Usually only real values of the wave vectors are discussed in text books, since infinite periodicity is assumed and, in that situation, wave functions growing exponentially in any direction would not be physically valid. However, localized wave functions with an exponential decay are indeed perfectly valid solution of the Schrodinger equation in the presence of defects, surfaces or interfaces. For this reason, properties of MIGS have been typically discussed in terms of the complex band structure of bulk materials. The probable dependence on the interface particulars has been rarely taken into account explicitly due to the difficulties to include them into the model or simulations. We aim to characterize from first-principles simulations the MIGS in realistic ferroelectric capacitors and their connection with the complex band structure of the ferroelectric material. We emphasize the influence of the real interface beyond the complex band structure of bulk materials. Financial support provided by MICINN Grant FIS2009-12721-C04-02, and by the European Union Grant No. CP-FP 228989-2 ``OxIDes''. Computer resources provided by the RES.

  14. A simple state-contingent pricing rule for complex intertemporal externalities

    Energy Technology Data Exchange (ETDEWEB)

    McKitrick, Ross [Guelph Univ., ON (Canada). Dept. of Economics

    2011-01-15

    Some externalities, such as global warming, involve complex relationships between emissions and an environmental state variable, with effects over lags of uncertain length. Coming up with theoretically-motivated and practical policy options in such cases has proven difficult. Deterministic intertemporal general equilibrium models yield what appear to be feasible optimal price paths, but only by assuming away many key uncertainties, nor do they specify how the possibility of new information should affect the policy path. Bayesian models allow limited uncertainty and optimal learning based on observed effects of policy changes, but suggest a discouraging delay before optimal policy can be identified. A full insurance model suggests that risk aversion and 'fat-tailed' probabilities of catastrophe imply an implausibly (or at least impractically) large risk premium, implying that practical policy decisions depend so critically on uncertain parameters as to be unavoidably arbitrary. This paper proposes an entirely new approach based on the observation that the situation giving rise to a complex intertemporal externality also yields an observable state variable that contains information relevant to the identification of the optimal policy path. I derive a simple transformation by which the state variable can yield a good approximation to the optimal externality price. I outline assumptions sufficient to yield the transformation, and present numerical examples that illustrate its ability to follow linear and nonlinear first-best price paths. A specific application to greenhouse gases is proposed. (author)

  15. A simple state-contingent pricing rule for complex intertemporal externalities

    International Nuclear Information System (INIS)

    McKitrick, Ross

    2011-01-01

    Some externalities, such as global warming, involve complex relationships between emissions and an environmental state variable, with effects over lags of uncertain length. Coming up with theoretically-motivated and practical policy options in such cases has proven difficult. Deterministic intertemporal general equilibrium models yield what appear to be feasible optimal price paths, but only by assuming away many key uncertainties, nor do they specify how the possibility of new information should affect the policy path. Bayesian models allow limited uncertainty and optimal learning based on observed effects of policy changes, but suggest a discouraging delay before optimal policy can be identified. A full insurance model suggests that risk aversion and 'fat-tailed' probabilities of catastrophe imply an implausibly (or at least impractically) large risk premium, implying that practical policy decisions depend so critically on uncertain parameters as to be unavoidably arbitrary. This paper proposes an entirely new approach based on the observation that the situation giving rise to a complex intertemporal externality also yields an observable state variable that contains information relevant to the identification of the optimal policy path. I derive a simple transformation by which the state variable can yield a good approximation to the optimal externality price. I outline assumptions sufficient to yield the transformation, and present numerical examples that illustrate its ability to follow linear and nonlinear first-best price paths. A specific application to greenhouse gases is proposed. (author)

  16. State-Dependence of the Climate Sensitivity in Earth System Models of Intermediate Complexity

    Science.gov (United States)

    Pfister, Patrik L.; Stocker, Thomas F.

    2017-10-01

    Growing evidence from general circulation models (GCMs) indicates that the equilibrium climate sensitivity (ECS) depends on the magnitude of forcing, which is commonly referred to as state-dependence. We present a comprehensive assessment of ECS state-dependence in Earth system models of intermediate complexity (EMICs) by analyzing millennial simulations with sustained 2×CO2 and 4×CO2 forcings. We compare different extrapolation methods and show that ECS is smaller in the higher-forcing scenario in 12 out of 15 EMICs, in contrast to the opposite behavior reported from GCMs. In one such EMIC, the Bern3D-LPX model, this state-dependence is mainly due to the weakening sea ice-albedo feedback in the Southern Ocean, which depends on model configuration. Due to ocean-mixing adjustments, state-dependence is only detected hundreds of years after the abrupt forcing, highlighting the need for long model integrations. Adjustments to feedback parametrizations of EMICs may be necessary if GCM intercomparisons confirm an opposite state-dependence.

  17. The steady-state and time-resolved photophysical properties of a dimeric indium phthalocyanine complex

    International Nuclear Information System (INIS)

    Chen Yu; Araki, Yasuyuki; Dini, Danilo; Liu Ying; Ito, Osamu; Fujitsuka, Mamoru

    2006-01-01

    The steady-state and time-resolved photophysical properties and some molecular orbital calculation results of a dimeric indium phthalocyanine complex with an indium-indium bond, i.e., [tBu 4 PcIn] 2 .2tmed, have been described. The results regarding triplet excited state lifetimes can be ascribed to strong intramolecular interactions existing only in the excited state of this dimer because no significant difference in the absorption spectra of the tBu 4 PcInCl monomer and the [tBu 4 PcIn] 2 .2tmed dimer is observed, suggesting that no ground-state interaction can be assessed. The deactivation processes of the excited singlet state of [tBu 4 PcIn] 2 .2tmed are apparently faster than that of μ-oxo-bridged PcIn dimer [tBu 4 PcIn] 2 O. Molecular orbital calculation on the PcIn dimer shows no node between two indium atoms was found in the HOMO - 2 of the PcIn-InPc dimer, suggesting that bonding electrons distribute between two indium atoms

  18. Complex transitions between spike, burst or chaos synchronization states in coupled neurons with coexisting bursting patterns

    International Nuclear Information System (INIS)

    Gu Hua-Guang; Chen Sheng-Gen; Li Yu-Ye

    2015-01-01

    We investigated the synchronization dynamics of a coupled neuronal system composed of two identical Chay model neurons. The Chay model showed coexisting period-1 and period-2 bursting patterns as a parameter and initial values are varied. We simulated multiple periodic and chaotic bursting patterns with non-(NS), burst phase (BS), spike phase (SS), complete (CS), and lag synchronization states. When the coexisting behavior is near period-2 bursting, the transitions of synchronization states of the coupled system follows very complex transitions that begins with transitions between BS and SS, moves to transitions between CS and SS, and to CS. Most initial values lead to the CS state of period-2 bursting while only a few lead to the CS state of period-1 bursting. When the coexisting behavior is near period-1 bursting, the transitions begin with NS, move to transitions between SS and BS, to transitions between SS and CS, and then to CS. Most initial values lead to the CS state of period-1 bursting but a few lead to the CS state of period-2 bursting. The BS was identified as chaos synchronization. The patterns for NS and transitions between BS and SS are insensitive to initial values. The patterns for transitions between CS and SS and the CS state are sensitive to them. The number of spikes per burst of non-CS bursting increases with increasing coupling strength. These results not only reveal the initial value- and parameter-dependent synchronization transitions of coupled systems with coexisting behaviors, but also facilitate interpretation of various bursting patterns and synchronization transitions generated in the nervous system with weak coupling strength. (paper)

  19. Complex zeros of the partition function of the Q-state Potts model

    International Nuclear Information System (INIS)

    Ghulghazaryan, R.G.

    2002-01-01

    Using the dynamical systems theory, the Yang-Lee and Potts zeros of the one-dimensional Q-state Potts model are investigated for Q>0. It is shown that in the one-dimensional case the phase transition points on the complex plane may be found from the condition of existence of neutral fixed points. Densities of the Yang-Lee and Potts zeros and corresponding critical exponents are found. The Yang-Lee and Potts zeros are classified depending on the parameters of the model

  20. Guide for Migrants in the State of Illinois = Guia para Migrantes en el Estado de Illinois.

    Science.gov (United States)

    Langemach, Sharon; Koepplinger, Jessica

    Prepared for migrant farmworkers traveling in the State of Illinois, the booklet, written in English and Spanish, provides basic information on (1) employment conditions--requirements of crew leaders and employers, deductions from wages, and laws regulating child labor; (2) housing--conditions of the camp grounds and of living units; (3)…

  1. On common noise-induced synchronization in complex networks with state-dependent noise diffusion processes

    Science.gov (United States)

    Russo, Giovanni; Shorten, Robert

    2018-04-01

    This paper is concerned with the study of common noise-induced synchronization phenomena in complex networks of diffusively coupled nonlinear systems. We consider the case where common noise propagation depends on the network state and, as a result, the noise diffusion process at the nodes depends on the state of the network. For such networks, we present an algebraic sufficient condition for the onset of synchronization, which depends on the network topology, the dynamics at the nodes, the coupling strength and the noise diffusion. Our result explicitly shows that certain noise diffusion processes can drive an unsynchronized network towards synchronization. In order to illustrate the effectiveness of our result, we consider two applications: collective decision processes and synchronization of chaotic systems. We explicitly show that, in the former application, a sufficiently large noise can drive a population towards a common decision, while, in the latter, we show how common noise can synchronize a network of Lorentz chaotic systems.

  2. Recoil chemistry and solid state exchange in cobalt complexes : a new model

    International Nuclear Information System (INIS)

    Ramshesh, V.

    1981-01-01

    During the last thirty years considerable work has been done on various aspects of recoil chemistry and solid state exchange in cobalt complexes. Several interesting features such as 'oxygen effect', 'water of hydration effect', 'dilution with isomorphous materials', etc., have been observed. These data led workers to reject the older hypothesis based on 'fragmentation' and 'recombination' and suggest models based on exciton or electron induced exchange. However some recent data show that perhaps both the processes viz., thermal annealing in n-irradiated systems and solid state exchange are not bulk processes. This has led the author to propose a new model. In this model greater emphasis is placed on dissociation reactions followed by recombination and/or exchange reactions. (author)

  3. Políticas de Estado de Bienestar para la equidad Welfare State policies for equity

    Directory of Open Access Journals (Sweden)

    Águeda Quiroga

    2004-05-01

    Full Text Available Este artículo analiza la evolución del gasto público en protección social en España durante el período 1991-2000 (último año para el que existen datos comparables con la Unión Europea [UE], tanto globalmente como por algunos de los capítulos que conforman este gasto: sanidad, familia, supervivencia, invalidez y vejez. Se analiza el gasto como porcentaje del PIB y el gasto per cápita en unidades de poder de compra. El artículo documenta la divergencia del gasto en protección social español con el promedio de la UE durante el período 1993-2000, aumentando el déficit del gasto público en protección social de España con la UE. También se analiza el grado de desarrollo de los servicios a las familias (escuelas de infancia y atención a las personas mayores con dependencia, por su gran influencia en las desigualdades de género.This article analyzes the evolution of public social expenditure in Spain from 1991 to 2000. It includes the analysis of the total public social expenditure as well as four of its components: sickness/health care, invalidity/old age, survivors, family/children. Expenditure is analyzed as a percentage of the GNP, and expenditure per capita in purchasing power units. This article shows that there has been an increase since 1993 in the deficit of the public expenditure on social protection in Spain representing a divergence from the average expenditure in the UE. The article also analyzes the development of care services (child care and services for dependent elderly, due their impact on gender inequalities.

  4. Poverty in the Brazilian Amazon: An Assessment of Poverty Focused on the State of Para

    OpenAIRE

    Verner, Dorte

    2004-01-01

    The states in the Brazilian Amazon have made progress in reducing poverty and improving social indicators in the last decade. Despite this progress, the poverty rate in the Amazon is among the highest in Brazil. As of 2000, rural poverty is the greatest challenge. In Par?, not only is the headcount poverty rate of 58.4 percent in rural areas more than 55 percent higher than headcount pover...

  5. Binary and ternary recombination of para-H3(+) and ortho-H3(+) with electrons: state selective study at 77-200 K.

    Science.gov (United States)

    Dohnal, Petr; Hejduk, Michal; Varju, Jozef; Rubovič, Peter; Roučka, Štěpán; Kotrík, Tomáš; Plašil, Radek; Glosík, Juraj; Johnsen, Rainer

    2012-06-28

    Measurements in H(3)(+) afterglow plasmas with spectroscopically determined relative abundances of H(3)(+) ions in the para-nuclear and ortho-nuclear spin states provide clear evidence that at low temperatures (77-200 K) para-H(3)(+) ions recombine significantly faster with electrons than ions in the ortho state, in agreement with a recent theoretical prediction. The cavity ring-down absorption spectroscopy used here provides an in situ determination of the para/ortho abundance ratio and yields additional information on the translational and rotational temperatures of the recombining ions. The results show that H(3)(+) recombination with electrons occurs by both binary recombination and third-body (helium) assisted recombination, and that both the two-body and three-body rate coefficients depend on the nuclear spin states. Electron-stabilized (collisional-radiative) recombination appears to make only a small contribution.

  6. Binary and ternary recombination of para-H3+ and ortho-H3+ with electrons: State selective study at 77-200 K

    Science.gov (United States)

    Dohnal, Petr; Hejduk, Michal; Varju, Jozef; Rubovič, Peter; Roučka, Štěpán; Kotrík, Tomáš; Plašil, Radek; Glosík, Juraj; Johnsen, Rainer

    2012-06-01

    Measurements in H_3^+ afterglow plasmas with spectroscopically determined relative abundances of H_3^+ ions in the para-nuclear and ortho-nuclear spin states provide clear evidence that at low temperatures (77-200 K) para-H_3^+ ions recombine significantly faster with electrons than ions in the ortho state, in agreement with a recent theoretical prediction. The cavity ring-down absorption spectroscopy used here provides an in situ determination of the para/ortho abundance ratio and yields additional information on the translational and rotational temperatures of the recombining ions. The results show that H_3^+ recombination with electrons occurs by both binary recombination and third-body (helium) assisted recombination, and that both the two-body and three-body rate coefficients depend on the nuclear spin states. Electron-stabilized (collisional-radiative) recombination appears to make only a small contribution.

  7. Towards Hybrid Online On-Demand Querying of Realtime Data with Stateful Complex Event Processing

    Energy Technology Data Exchange (ETDEWEB)

    Zhou, Qunzhi; Simmhan, Yogesh; Prasanna, Viktor K.

    2013-10-09

    Emerging Big Data applications in areas like e-commerce and energy industry require both online and on-demand queries to be performed over vast and fast data arriving as streams. These present novel challenges to Big Data management systems. Complex Event Processing (CEP) is recognized as a high performance online query scheme which in particular deals with the velocity aspect of the 3-V’s of Big Data. However, traditional CEP systems do not consider data variety and lack the capability to embed ad hoc queries over the volume of data streams. In this paper, we propose H2O, a stateful complex event processing framework, to support hybrid online and on-demand queries over realtime data. We propose a semantically enriched event and query model to address data variety. A formal query algebra is developed to precisely capture the stateful and containment semantics of online and on-demand queries. We describe techniques to achieve the interactive query processing over realtime data featured by efficient online querying, dynamic stream data persistence and on-demand access. The system architecture is presented and the current implementation status reported.

  8. Halonium Ions as Halogen Bond Donors in the Solid State [XL2]Y Complexes.

    Science.gov (United States)

    Rissanen, Kari; Haukka, Matti

    2015-01-01

    The utilization of halogen bonding interactions is one of the most rapidly developing areas of supramolecular chemistry. While the other weak non-covalent interactions and their influence on the structure and chemistry of various molecules, complexes, and materials have been investigated extensively, the understanding, utilizations, and true nature of halogen bonding are still relatively unexplored. Thus its final impact in chemistry in general and in materials science has not yet been fully established. Because of the polarized nature of a Z-X bond (Z=electron-withdrawing atom or moiety and X=halogen atom), such a moiety can act as halogen bond donor when the halogen is polarized enough by the atom/moiety Z. The most studied and utilized halogen bond donor molecules are the perfluorohalocarbons, where Z is a perfluorinated aryl or alkyl moiety and X is either iodine or bromine. Complementing the contemporary halogen bonding research, this chapter reviews the solid state structural chemistry of the most extremely polarized halogen atoms, viz. halonium ions, X+, and discussed them as halogen bond donors in the solid state [XL2]Y complexes (X=halonium ion, Y=any anion).

  9. The activity state of the branched-chain 2-oxo acid dehydrogenase complex in rat tissues.

    Science.gov (United States)

    Wagenmakers, A J; Schepens, J T; Veldhuizen, J A; Veerkamp, J H

    1984-05-15

    An assay is described to define the proportion of the branched-chain 2-oxo acid dehydrogenase complex that is present in the active state in rat tissues. Activities are measured in homogenates in two ways: actual activities, present in tissues, by blocking both the kinase and phosphatase of the enzyme complex during homogenization, preincubation, and incubation with 1-14C-labelled branched-chain 2-oxo acid, and total activities by blocking only the kinase during the 5 min preincubation (necessary for activation). The kinase is blocked by 5 mM-ADP and absence of Mg2+ and the phosphatase by the simultaneous presence of 50 mM-NaF. About 6% of the enzyme is active in skeletal muscle of fed rats, 7% in heart, 20% in diaphragm, 47% in kidney, 60% in brain and 98% in liver. An entirely different assay, which measures activities in crude tissue extracts before and after treatment with a broad-specificity protein phosphatase, gave similar results for heart, liver and kidney. Advantages of our assay with homogenates are the presence of intact mitochondria, the simplicity, the short duration and the high sensitivity. The actual activities measured indicate that the degradation of branched-chain 2-oxo acids predominantly occurs in liver and kidney and is limited in skeletal muscle in the fed state.

  10. Musa massif: mapping, petrology and petrochemical, Rio Maria, SE from Para State

    International Nuclear Information System (INIS)

    Gastal, M.C.P.

    1987-01-01

    The petrological, geochemical and geochronological studies allow some insight on the genesis and evolution of the Musa Massif. The different facies of the granitic body are cogenetic, although each of these facies presents some peculiarities in its genesis and evolution. These data suggests that the granite magma evolution was complex or, alternatively, that the facies were generated by liquids derived from different sources. A model of magmatic emplacement, genesis and differentiation is proposed and discussed. The granitic facies show a calc-alkaline compositions, exhibiting strong analogies with cordilleran granites or magnetite granites. An age of 1692 +- 11 Ma (Rb/Sr) with IR of 0,70777 +- 0,00023 was obtained for different facies of Massif. A preliminary attempt to individualize geochronology the principal facies was done and showed that there is a coincidence between the ages and the emplacement sequence of these facies of the pluton. (author)

  11. Decreased Complexity in Alzheimer's Disease: Resting-State fMRI Evidence of Brain Entropy Mapping

    Directory of Open Access Journals (Sweden)

    Bin Wang

    2017-11-01

    Full Text Available Alzheimer's disease (AD is a frequently observed, irreversible brain function disorder among elderly individuals. Resting-state functional magnetic resonance imaging (rs-fMRI has been introduced as an alternative approach to assessing brain functional abnormalities in AD patients. However, alterations in the brain rs-fMRI signal complexities in mild cognitive impairment (MCI and AD patients remain unclear. Here, we described the novel application of permutation entropy (PE to investigate the abnormal complexity of rs-fMRI signals in MCI and AD patients. The rs-fMRI signals of 30 normal controls (NCs, 33 early MCI (EMCI, 32 late MCI (LMCI, and 29 AD patients were obtained from the Alzheimer's disease Neuroimaging Initiative (ADNI database. After preprocessing, whole-brain entropy maps of the four groups were extracted and subjected to Gaussian smoothing. We performed a one-way analysis of variance (ANOVA on the brain entropy maps of the four groups. The results after adjusting for age and sex differences together revealed that the patients with AD exhibited lower complexity than did the MCI and NC controls. We found five clusters that exhibited significant differences and were distributed primarily in the occipital, frontal, and temporal lobes. The average PE of the five clusters exhibited a decreasing trend from MCI to AD. The AD group exhibited the least complexity. Additionally, the average PE of the five clusters was significantly positively correlated with the Mini-Mental State Examination (MMSE scores and significantly negatively correlated with Functional Assessment Questionnaire (FAQ scores and global Clinical Dementia Rating (CDR scores in the patient groups. Significant correlations were also found between the PE and regional homogeneity (ReHo in the patient groups. These results indicated that declines in PE might be related to changes in regional functional homogeneity in AD. These findings suggested that complexity analyses using PE

  12. Designing molecular complexes using free-energy derivatives from liquid-state integral equation theory

    International Nuclear Information System (INIS)

    Mrugalla, Florian; Kast, Stefan M

    2016-01-01

    Complex formation between molecules in solution is the key process by which molecular interactions are translated into functional systems. These processes are governed by the binding or free energy of association which depends on both direct molecular interactions and the solvation contribution. A design goal frequently addressed in pharmaceutical sciences is the optimization of chemical properties of the complex partners in the sense of minimizing their binding free energy with respect to a change in chemical structure. Here, we demonstrate that liquid-state theory in the form of the solute–solute equation of the reference interaction site model provides all necessary information for such a task with high efficiency. In particular, computing derivatives of the potential of mean force (PMF), which defines the free-energy surface of complex formation, with respect to potential parameters can be viewed as a means to define a direction in chemical space toward better binders. We illustrate the methodology in the benchmark case of alkali ion binding to the crown ether 18-crown-6 in aqueous solution. In order to examine the validity of the underlying solute–solute theory, we first compare PMFs computed by different approaches, including explicit free-energy molecular dynamics simulations as a reference. Predictions of an optimally binding ion radius based on free-energy derivatives are then shown to yield consistent results for different ion parameter sets and to compare well with earlier, orders-of-magnitude more costly explicit simulation results. This proof-of-principle study, therefore, demonstrates the potential of liquid-state theory for molecular design problems. (paper)

  13. Distinguishing cognitive state with multifractal complexity of hippocampal interspike interval sequences

    Directory of Open Access Journals (Sweden)

    Dustin eFetterhoff

    2015-09-01

    Full Text Available Fractality, represented as self-similar repeating patterns, is ubiquitous in nature and the brain. Dynamic patterns of hippocampal spike trains are known to exhibit multifractal properties during working memory processing; however, it is unclear whether the multifractal properties inherent to hippocampal spike trains reflect active cognitive processing. To examine this possibility, hippocampal neuronal ensembles were recorded from rats before, during and after a spatial working memory task following administration of tetrahydrocannabinol (THC, a memory-impairing component of cannabis. Multifractal detrended fluctuation analysis was performed on hippocampal interspike interval sequences to determine characteristics of monofractal long-range temporal correlations (LRTCs, quantified by the Hurst exponent, and the degree/magnitude of multifractal complexity, quantified by the width of the singularity spectrum. Our results demonstrate that multifractal firing patterns of hippocampal spike trains are a marker of functional memory processing, as they are more complex during the working memory task and significantly reduced following administration of memory impairing THC doses. Conversely, LRTCs are largest during resting state recordings, therefore reflecting different information compared to multifractality. In order to deepen conceptual understanding of multifractal complexity and LRTCs, these measures were compared to classical methods using hippocampal frequency content and firing variability measures. These results showed that LRTCs, multifractality, and theta rhythm represent independent processes, while delta rhythm correlated with multifractality. Taken together, these results provide a novel perspective on memory function by demonstrating that the multifractal nature of spike trains reflects hippocampal microcircuit activity that can be used to detect and quantify cognitive, physiological and pathological states.

  14. Jahn-Teller distortion in the phosphorescent excited state of three-coordinate Au(I) phosphine complexes.

    Science.gov (United States)

    Barakat, Khaldoon A; Cundari, Thomas R; Omary, Mohammad A

    2003-11-26

    DFT calculations were used to optimize the phosphorescent excited state of three-coordinate [Au(PR3)3]+ complexes. The results indicate that the complexes rearrange from their singlet ground-state trigonal planar geometry to a T-shape in the lowest triplet luminescent excited state. The optimized structure of the exciton contradicts the structure predicted based on the AuP bonding properties of the ground-state HOMO and LUMO. The rearrangement to T-shape is a Jahn-Teller distortion because an electron is taken from the degenerate e' (5dxy, 5dx2-y2) orbital upon photoexcitation of the ground-state D3h complex. The calculated UV absorption and visible emission energies are consistent with the experimental data and explain the large Stokes' shifts while such correlations are not possible in optimized models that constrained the exciton to the ground-state trigonal geometry.

  15. Capture techniques' use of Caranguejo-uçá crabs (Ucides cordatus) in Paraíba state (northeastern Brazil) and its socio-environmental implications.

    Science.gov (United States)

    Nascimento, Douglas M; Ferreira, Emmanoela N; Bezerra, Dandara M M S Q; Rocha, Pollyana D; Alves, Rômulo R N; Mourão, José S

    2012-12-01

    The present study was undertaken in two traditional communities that are located on the margins of the estuary and mangrove complex of the Mamanguape River, Paraíba state (PB), Brazil. This work describes the crabs capture techniques tapamento and redinha, and identifies the negative socio-environmental impacts of redinha, using qualitative methods (open and semi-structured interviews, guided tours, direct observation and the administration of questionnaires). Results indicate that currently only two principle techniques are used to capture Ucides cordatus: redinha and tapamento. Tapamento has a low impact in relation to redinha. Redinha was pointed out by interviewees as a system that has social impact (social conflicts, breaking of traditions, substitution and extinction of techniques) and environmental impact (less selective captures and high productivity, mangrove pollution, death of crabs caught in traps, cutting of the roots of Rhizophora mangle, micro-habitat loss resulting from galleries destroyed and polluted). Knowledge of crab harvesting carried out using these two techniques and the possible social and environmental impacts caused by redinha, can lead to more effective planning and actions towards the conservation of the species.

  16. Complexidade do regime terapêutico prescrito para idosos Complexity of therapeutic regimens prescribed for elderly retirees, Belo Horizonte/MG, Brazil

    Directory of Open Access Journals (Sweden)

    Francisco de Assis Acurcio

    2009-01-01

    Full Text Available OBJETIVO: Analisar fatores associados à complexidade do esquema terapêutico em prescrições de medicamentos para idosos, em Belo Horizonte (MG. MÉTODOS: Inquérito domiciliar, com idosos selecionados por amostragem aleatória simples, a partir do cadastro do INSS. O Índice de Complexidade Terapêutica (ICT, medida direta das ações necessárias para administrar o medicamento, foi obtido de informações contidas na última prescrição. Foram realizadas análises univariada e bivariada dos dados para identificar fatores associados ao ICT. RESULTADOS: Dos 667 entrevistados, 56,5% apresentaram prescrição que atendia aos critérios de inclusão. A maioria (69,2% era do sexo feminino com idade média de 72,4 anos. 35,5% consideravam seu estado de saúde bom ou muito bom e 37,4% relataram cinco ou mais doenças. Nos 15 dias anteriores à entrevista, foram utilizados 1873 medicamentos (média=5,1, desses, 942 constavam nas prescrições analisadas (média=2,5. Para o mesmo período, 22,3% dos entrevistados deixaram de usar algum medicamento prescrito. O ICT encontrado variou de 1 a 24 (média=6,1. Número de medicamentos prescritos (>2, menor escolaridade, pior percepção de saúde e menor valor do benefício recebido foram associados positivamente à maior complexidade (pOBJECTIVE: To examine factors associated with therapeutic regimen complexity of drug prescriptions for elderly people in Belo Horizonte, Minas Gerais, Brazil. METHODS: A household survey of elderly people selected by simple random sampling from Brazil's social security register. The medication complexity index (MCI, a direct measurement of actions required to administer medication, was derived from information in the latest prescription. Univariate and bivariate analyses were performed to identify factors associated with the MCI. RESULTS: Of the 667 interviewees, 56.5% had prescriptions meeting the inclusion criteria; most (69.2% were females aged 72.4 years (mean; 35

  17. Forced-rupture of cell-adhesion complexes reveals abrupt switch between two brittle states

    Science.gov (United States)

    Toan, Ngo Minh; Thirumalai, D.

    2018-03-01

    Cell adhesion complexes (CACs), which are activated by ligand binding, play key roles in many cellular functions ranging from cell cycle regulation to mediation of cell extracellular matrix adhesion. Inspired by single molecule pulling experiments using atomic force spectroscopy on leukocyte function-associated antigen-1 (LFA-1), expressed in T-cells, bound to intercellular adhesion molecules (ICAM), we performed constant loading rate (rf) and constant force (F) simulations using the self-organized polymer model to describe the mechanism of ligand rupture from CACs. The simulations reproduce the major experimental finding on the kinetics of the rupture process, namely, the dependence of the most probable rupture forces (f*s) on ln rf (rf is the loading rate) exhibits two distinct linear regimes. The first, at low rf, has a shallow slope, whereas the slope at high rf is much larger, especially for a LFA-1/ICAM-1 complex with the transition between the two occurring over a narrow rf range. Locations of the two transition states (TSs) extracted from the simulations show an abrupt change from a high value at low rf or constant force, F, to a low value at high rf or F. This unusual behavior in which the CACs switch from one brittle (TS position is a constant over a range of forces) state to another brittle state is not found in forced-rupture in other protein complexes. We explain this novel behavior by constructing the free energy profiles, F(Λ)s, as a function of a collective reaction coordinate (Λ), involving many key charged residues and a critical metal ion (Mg2+). The TS positions in F(Λ), which quantitatively agree with the parameters extracted using the Bell-Evans model, change abruptly at a critical force, demonstrating that it, rather than the molecular extension, is a good reaction coordinate. Our combined analyses using simulations performed in both the pulling modes (constant rf and F) reveal a new mechanism for the two loading regimes observed in the

  18. A system to analyze the complex physiological states of coal solubilizing fungi

    Energy Technology Data Exchange (ETDEWEB)

    Hoelker, U.; Moenkemann, H.; Hoefer, M. [Universitaet Bonn, Bonn (Germany). Botanisches Institut

    1997-11-01

    The mechanism by which some microorganisms solubilize brown coal is still unknown. The paper discusses the deuteromycetes Fusarium oxysporum and Trichoderma atroviride as a suitable test system to analyse the complex fungal physiology relating to coal solubilization. The two fungi can occur in two different growth substrate-controlled physiological states: a coal-solubilizing one, when cells are grown on glutamate or gluconate as substrate and a non-solubilizing one, when grown on carbohydrates. When grown on carbohydrates, F.oxysporum produces the pigment bikaverein. Purified bikaverein inhibits also coal solubilization by T. atroviride. The ability to solubilize coal is constitutive in F. oxysporum, while in T. atroviride, it has to be induced. 10 refs., 3 figs., 3 tabs.

  19. Complex state variable- and disturbance observer-based current controllers for AC drives

    DEFF Research Database (Denmark)

    Dal, Mehmet; Teodorescu, Remus; Blaabjerg, Frede

    2013-01-01

    In vector-controlled AC drives, the design of current controller is usually based on a machine model defined in synchronous frame coordinate, where the drive performance may be degraded by both the variation of the machine parameters and the cross-coupling between the d- and q-axes components...... of the stator current. In order to improve the current control performance an alternative current control strategy was proposed previously aiming to avoid the undesired cross-coupling and non-linearities between the state variables. These effects are assumed as disturbances arisen in the closed-loop path...... of the parameter and the cross-coupling effect. Moreover, it provides a better performance, smooth and low noisy operation with respect to the complex variable controller....

  20. Radionuclide diagnosis of hepatobiliary system functional state at complex treatment of uterine cancer

    International Nuclear Information System (INIS)

    Vusik, Yi.M.; Slabodchikov, M.Je.; Nesterov, V.G.

    1993-01-01

    The study involved 68 patients with uterine cancer (stage II-III) who underwent complex treatment and 16 healthy women aged 27-69. The patients were performed hepatography (44 of them - dynamic liver scintigraphy with Tc 99m - mezida) before the treatment, immediately after and 1-1.5 and 2-3 years after the course of radiotherapy. Latent disturbance of hepatobiliary system function which can be revealed with radionuclide study is shown to be observed in the patients with uterine cancer before the treatment. The level of hepatocytes functioning after the treatment depends largely on their initial functional state. Computer assisted multichannel radiography with evaluation of effective blood flow in the liver and effective fraction of minute volume of the blood flow is the most reasonable for monitoring hepatocytes function during treatment in the patients with uterine cancer

  1. Tracking shocked dust: State estimation for a complex plasma during a shock wave

    International Nuclear Information System (INIS)

    Oxtoby, Neil P.; Ralph, Jason F.; Durniak, Celine; Samsonov, Dmitry

    2012-01-01

    We consider a two-dimensional complex (dusty) plasma crystal excited by an electrostatically-induced shock wave. Dust particle kinematics in such a system are usually determined using particle tracking velocimetry. In this work we present a particle tracking algorithm which determines the dust particle kinematics with significantly higher accuracy than particle tracking velocimetry. The algorithm uses multiple extended Kalman filters to estimate the particle states and an interacting multiple model to assign probabilities to the different filters. This enables the determination of relevant physical properties of the dust, such as kinetic energy and kinetic temperature, with high precision. We use a Hugoniot shock-jump relation to calculate a pressure-volume diagram from the shocked dust kinematics. Calculation of the full pressure-volume diagram was possible with our tracking algorithm, but not with particle tracking velocimetry.

  2. Resting state fMRI entropy probes complexity of brain activity in adults with ADHD.

    Science.gov (United States)

    Sokunbi, Moses O; Fung, Wilson; Sawlani, Vijay; Choppin, Sabine; Linden, David E J; Thome, Johannes

    2013-12-30

    In patients with attention deficit hyperactivity disorder (ADHD), quantitative neuroimaging techniques have revealed abnormalities in various brain regions, including the frontal cortex, striatum, cerebellum, and occipital cortex. Nonlinear signal processing techniques such as sample entropy have been used to probe the regularity of brain magnetoencephalography signals in patients with ADHD. In the present study, we extend this technique to analyse the complex output patterns of the 4 dimensional resting state functional magnetic resonance imaging signals in adult patients with ADHD. After adjusting for the effect of age, we found whole brain entropy differences (P=0.002) between groups and negative correlation (r=-0.45) between symptom scores and mean whole brain entropy values, indicating lower complexity in patients. In the regional analysis, patients showed reduced entropy in frontal and occipital regions bilaterally and a significant negative correlation between the symptom scores and the entropy maps at a family-wise error corrected cluster level of Pentropy is a useful tool in revealing abnormalities in the brain dynamics of patients with psychiatric disorders. © 2013 Elsevier Ireland Ltd. All rights reserved.

  3. Crystallizing Vanadium Pentoxide Nanostructures in the Solid-State Using Modified Block Copolymer and Chitosan Complexes

    Directory of Open Access Journals (Sweden)

    C. Diaz

    2015-01-01

    Full Text Available A systematic study of the synthesis of V2O5 nanostructured materials using macromolecular PS-co-4-PVP·(VCl3y and chitosan·(VCl3y complexes is presented. It is demonstrated that various coordination degrees of the metal into the polymeric chain specifically influence the product formation after pyrolysis. PS-co-4-PVP·(VCl3y and chitosan·(VCl3y complexes were prepared by simple coordination reaction of VCl3 with the respective polymer in molar ratios 1 : 1, 1 : 5, and 1 : 10 metal/polymer and characterized by elemental analysis, IR spectroscopy, and TGA/DSC analysis. Solid-state thermolysis of these precursors at several temperatures under air results in nanostructured V2O5 using all precursors. The size and shape of the nanostructured V2O5 depend on the nature of the polymer. For the chitosan·(VCl3y precursors sub-10 nm nanocrystals are formed. The calcination process, involved in the preparation method, produces V2O5 with photoluminescence in the visible light region, suggesting the possible application in oxygen sensing devices.

  4. Mechanics of metal-catecholate complexes: The roles of coordination state and metal types

    Science.gov (United States)

    Xu, Zhiping

    2013-01-01

    There have been growing evidences for the critical roles of metal-coordination complexes in defining structural and mechanical properties of unmineralized biological materials, including hardness, toughness, and abrasion resistance. Their dynamic (e.g. pH-responsive, self-healable, reversible) properties inspire promising applications of synthetic materials following this concept. However, mechanics of these coordination crosslinks, which lays the ground for predictive and rational material design, has not yet been well addressed. Here we present a first-principles study of representative coordination complexes between metals and catechols. The results show that these crosslinks offer stiffness and strength near a covalent bond, which strongly depend on the coordination state and type of metals. This dependence is discussed by analyzing the nature of bonding between metals and catechols. The responsive mechanics of metal-coordination is further mapped from the single-molecule level to a networked material. The results presented here provide fundamental understanding and principles for material selection in metal-coordination-based applications. PMID:24107799

  5. Effects of enzyme complex SSF (solid state fermentation in pellet diets for Nile tilapia

    Directory of Open Access Journals (Sweden)

    Guilherme de Souza Moura

    2012-10-01

    Full Text Available The effects of enzyme complex SSF (solid state fermentation on growth performance and the availability of sucrose and monosaccharides in the chyme of Nile were involved. The study included 360 fish (70g±4.43 in a completely randomized design with six dietary treatments (0, 50, 100, 150, 200 and 250 ppm of SSF arranged in six replicates, with 10 fish per replicate. Every 15 days, one tilapia of each experimental unit was sacrificed for analyses of carbohydrate in the chyme. On day 60 of the experiment, the performance parameters were measured. There was a linear effect according to treatment for final weight and weight gain. For the other performance parameters, there were no differences. There was quadratic effect for sucrose and glucose in function of the treatment, whereas the fructose levels increased linearly. The addition of 150 ppm of the enzyme complex SSF in the feed improves the performance of Nile tilapia and increases the availability of sucrose and monosaccharides in the chyme.

  6. Employment and income generation within the framework of the 'Luz para todos' program in the State of Amazonas, Brazil; Geracao de emprego e renda no ambito do programa Luz para Todos no estado do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Rubem Cesar Rodrigues; Moraes, Betsy Eddy Praia; Souza, Cristiane Daliassi Ramos de [Universidade Federal do Amazonas (UFAM), Manaus, AM (Brazil). Centro de Desenvolvimento Energetico Amazonico

    2008-07-01

    The low level of the electric demand to be accomplished in the isolated Amazon communities, associated to the low purchasing power of those populations and the high costs for electrification of these, they impose the implementation of concrete actions of generation of job and income when it intend to assure the universalization of the electric power service in isolated Amazon communities, as ir the case of the program 'Luz para Todos'. The present article shows that is being developed by the committee state manager of the program 'Luz para Todos' in the amazon state, demonstrating that it is possible to assure good results since the effective involvement of several agents is made possible. (author)

  7. Molluscs production associated to lunar-tide cycle: a case study in Paraíba State under ethnoecology viewpoint

    Directory of Open Access Journals (Sweden)

    Alves Rômulo RN

    2006-06-01

    Full Text Available Abstract Molluscs have been for a long time a very important food resource for humans. Therefore, oysters, clams, and mussels are highly required at seafood markets. Like any commercial food, it is necessary that molluscs present good quality standards, concerning some criteria such as amount of meat and appearance. In bivalves, condition index or fattening index is considered a satisfactory method for estimating the amount of meat related to the shell cavity. Molluscs gatherers of Paraíba State coast, northeastern Brazil, state that molluscan meat production increases during spring tide (designated by them as maré de lançamento in opposition to the meat decrease which happens during neap tide (maré de quebramento (they are designated technically in Portuguese as maré de sizígia and maré de quadratura, respectively. Weperformed a survey on the production of unha-de-velho or 'oldman'snail' (Tagelus plebeius caught by molluscs gatherers in the estuary of River Paraíba do Norte, by observing locally their work, applying questionnaires, searching for a possible scientific relation of that molluscs condition to the gatherers empirical statement. Thus, we estimatedthe molluscs condition index through the method of solids percentage determination. We studied their work and the molluscs condition index during a full lunar-tide cycle. Determinations were carried out between 2nd September and 20th October, 1998, through 20 catches performed to obtain condition index from 400 bivalves. We observed that several biotic and abiotic ecological factors, namely reproduction cycle, biochemical components variations, animal size, and even parasitism, may affect the animal condition index. Despite this aspect, our present results confirmed a high overlapping (80% of the condition index curve with lunar-tide cycle, in agreement with the gatherers statement. Although we recognize the need for formulating and testing other hypotheses, we consider a priori that

  8. Electric generation situation through hybrid systems in Para state and perspectives in face of the global supply of electric power; Situacao da geracao eletrica atraves de sistemas hibridos no estado do Para e perspectivas frente a universalizacao da energia eletrica

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Claudomiro Fabio de Oliveira; Pinho, Joao Tavares; Pereira, Edinaldo Jose da Silva; Galhardo, Marcos Andre Barros; Vale, Silvio Bispo do; Maranhao, Wilson Monteiro de Albuquerque [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Grupo de Estudos e Desenvolvimento de Alternativas Energeticas], e-mail: gedae@ufpa.br

    2004-07-01

    This work presents an analysis of the hybrid systems for electricity generation installed in the State of Para, emphasizing the profile of the supplied localities, the conversion technologies in the several configurations used for electric power generation, the social, economic and environmental impacts caused by such systems, the management and sustainability of the systems, and their perspectives in face of the global supply of electric power in Brazil. (author)

  9. Hyperspectral clustering and unmixing for studying the ecology of state formation and complex societies

    Science.gov (United States)

    Kwong, Justin D.; Messinger, David W.; Middleton, William D.

    2009-08-01

    This project is an application of hyperspectral classification and unmixing in support of an ongoing archaeological study. The study region is the Oaxaca Valley located in the state of Oaxaca, Mexico on the southern coast. This was the birthplace of the Zapotec civilization which grew into a complex state level society. Hyperion imagery is being collected over a 30,000 km2 area. Classification maps of regions of interest are generated using K-means clustering and a novel algorithm called Gradient Flow. Gradient Flow departs from conventional stochastic or deterministic approaches, using graph theory to cluster spectral data. Spectral unmixing is conducted using the RIT developed algorithm Max-D to automatically find end members. Stepwise unmixing is performed to better model the data using the end members found be Max-D. Data are efficiently shared between imaging scientists and archaeologists using Google Earth to stream images over the internet rather than downloading them. The overall goal of the project is to provide archaeologists with useful information maps without having to interpret the raw data.

  10. Constructing Markov State Models to elucidate the functional conformational changes of complex biomolecules

    KAUST Repository

    Wang, Wei

    2017-10-06

    The function of complex biomolecular machines relies heavily on their conformational changes. Investigating these functional conformational changes is therefore essential for understanding the corresponding biological processes and promoting bioengineering applications and rational drug design. Constructing Markov State Models (MSMs) based on large-scale molecular dynamics simulations has emerged as a powerful approach to model functional conformational changes of the biomolecular system with sufficient resolution in both time and space. However, the rapid development of theory and algorithms for constructing MSMs has made it difficult for nonexperts to understand and apply the MSM framework, necessitating a comprehensive guidance toward its theory and practical usage. In this study, we introduce the MSM theory of conformational dynamics based on the projection operator scheme. We further propose a general protocol of constructing MSM to investigate functional conformational changes, which integrates the state-of-the-art techniques for building and optimizing initial pathways, performing adaptive sampling and constructing MSMs. We anticipate this protocol to be widely applied and useful in guiding nonexperts to study the functional conformational changes of large biomolecular systems via the MSM framework. We also discuss the current limitations of MSMs and some alternative methods to alleviate them.

  11. Model describing the effect of employment of the United States military in a complex emergency.

    Science.gov (United States)

    MacMillan, Donald S

    2005-01-01

    The end of the Cold War vastly altered the worldwide political landscape. With the loss of a main competitor, the United States (US) military has had to adapt its strategic, operational, and tactical doctrines to an ever-increasing variety of non-traditional missions, including humanitarian operations. Complex emergencies (CEs) are defined in this paper from a political and military perspective, various factors that contribute to their development are described, and issues resulting from the employment of US military forces are discussed. A model was developed to illustrate the course of a humanitarian emergency and the potential impact of a military response. The US intervention in Haiti, Northern Iraq, Kosovo, Somalia, Bosnia, and Rwanda serve as examples. A CE develops when there is civil conflict, loss of national governmental authority, a mass population movement, and massive economic failure, each leading to a general decline in food security. The military can alleviate a CE in four ways: (1) provide security for relief efforts; (2) enforce negotiated settlements; (3) provide security for non-combatants; and/or (4) employ logistical capabilities. The model incorporates Norton and Miskel's taxonomy of identifying failing states and helps illustrate the factors that lead to a CE. The model can be used to determine if and when military intervention will have the greatest impact. The model demonstrates that early military intervention and mission assignment within the core competencies of the forces can reverse the course of a CE. Further study will be needed to verify the model.

  12. Complex-network description of thermal quantum states in the Ising spin chain

    Science.gov (United States)

    Sundar, Bhuvanesh; Valdez, Marc Andrew; Carr, Lincoln D.; Hazzard, Kaden R. A.

    2018-05-01

    We use network analysis to describe and characterize an archetypal quantum system—an Ising spin chain in a transverse magnetic field. We analyze weighted networks for this quantum system, with link weights given by various measures of spin-spin correlations such as the von Neumann and Rényi mutual information, concurrence, and negativity. We analytically calculate the spin-spin correlations in the system at an arbitrary temperature by mapping the Ising spin chain to fermions, as well as numerically calculate the correlations in the ground state using matrix product state methods, and then analyze the resulting networks using a variety of network measures. We demonstrate that the network measures show some traits of complex networks already in this spin chain, arguably the simplest quantum many-body system. The network measures give insight into the phase diagram not easily captured by more typical quantities, such as the order parameter or correlation length. For example, the network structure varies with transverse field and temperature, and the structure in the quantum critical fan is different from the ordered and disordered phases.

  13. Disrupting neural activity related to awake-state sharp wave-ripple complexes prevents hippocampal learning.

    Science.gov (United States)

    Nokia, Miriam S; Mikkonen, Jarno E; Penttonen, Markku; Wikgren, Jan

    2012-01-01

    Oscillations in hippocampal local-field potentials (LFPs) reflect the crucial involvement of the hippocampus in memory trace formation: theta (4-8 Hz) oscillations and ripples (~200 Hz) occurring during sharp waves are thought to mediate encoding and consolidation, respectively. During sharp wave-ripple complexes (SPW-Rs), hippocampal cell firing closely follows the pattern that took place during the initial experience, most likely reflecting replay of that event. Disrupting hippocampal ripples using electrical stimulation either during training in awake animals or during sleep after training retards spatial learning. Here, adult rabbits were trained in trace eyeblink conditioning, a hippocampus-dependent associative learning task. A bright light was presented to the animals during the inter-trial interval (ITI), when awake, either during SPW-Rs or irrespective of their neural state. Learning was particularly poor when the light was presented following SPW-Rs. While the light did not disrupt the ripple itself, it elicited a theta-band oscillation, a state that does not usually coincide with SPW-Rs. Thus, it seems that consolidation depends on neuronal activity within and beyond the hippocampus taking place immediately after, but by no means limited to, hippocampal SPW-Rs.

  14. Chromium(0), molybdenum(0), and tungsten(0) isocyanide complexes as luminophores and photosensitizers with long-lived excited states

    International Nuclear Information System (INIS)

    Bueldt, Laura A.; Wenger, Oliver S.

    2017-01-01

    Arylisocyanide complexes based on earth-abundant Group 6 d 6 metals are interesting alternatives to photoactive complexes made from precious metals such as Ru II , Re I , Os II , or Ir III . Some of these complexes have long-lived 3 MLCT excited states that exhibit luminescence with good quantum yields as well as nano- to microsecond lifetimes, and they are very strongly reducing. Recent studies have demonstrated that Cr 0 , Mo 0 , and W 0 arylisocyanide complexes have great potential for applications in luminescent devices, photoredox catalysis, and dye-sensitized solar cells. (copyright 2017 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

  15. Study of nonequilibrium steady state of Fe(II) complex salt by means of synchrotron-radiation x-ray

    CERN Document Server

    Moritomo, Y

    2003-01-01

    In this article, we introduce our recent investigation at SPring-8/BL02B2 on the nonequilibrium steady state of photoexcited spin-crossover salts, which consists of Fe sup 2 sup + complexes and counter cations. The Fe sup 2 sup + complex takes two states; one is the low-spin state (S=0) and the other is the high-spin state (S=2). The photoexcitation can convert the low-spin site into the high-spin state, and hence, a finite the high-spin site is excited balancing with the thermal relaxation process. When the excitation power exceeds a critical value, we observe a dynamical phase transition into the high-spin condensed state.

  16. Psychiatric evaluation of intellectually disabled offenders referred to the Free State Psychiatric Complex, 1993-2003

    Directory of Open Access Journals (Sweden)

    F J W Calitz

    2007-12-01

    Full Text Available Background. Increased crime is a problem in South Africaand complications arise when the accused is intellectuallydisabled. The accountability and fitness to stand trial ofsuch individuals is an important facet that needs to bemanaged by the judicial and health systems.Objective. To analyse the accountability and triability ofintellectually disabled people awaiting trial referred tothe Free State Psychiatric Complex (FSPC from 1993 to2003 according to Sections 77 and 78 of the CriminalProcedures Act (Act 51 of 1977.Method. A retrospective study was conducted. The studypopulation consisted of 80 intellectually disabled peopleawaiting trial in the Free State, referred to the FSPC. Thereason for referral was the possibility that they were nottriable or accountable. A data form was compiled totransfer the relevant information from the patients’ clinicalfiles.Results. The study found that the majority of subjectswere male (96.3%, unmarried (76.3% and unemployed(63.8%. The median age was 27 years. A relativelyhigh percentage (49% had received some schoolingand 16% had attended a special school. Most (32%were referred from the Bloemfontein area and 68% werereferred from the remainder of the Free State and otherareas. The majority were referred according to Sections77 and 78. The highest number of the offences were ofa sexual nature (78%. Of the subjects, 62 (62.5% werediagnosed as having mild mental retardation, while 16%were diagnosed as having moderate mental retardation.A total of 71 (71.25% were found to be untriable andunaccountable.Conclusion. Triability and accountability are not onlyreflected by IQ score, but also involve the accused’sunderstanding of his/her environment, his/her speechand language proficiency, level of education, reasoningability and the manner in which the crime was committed.It is important to note that having an IQ of 70 or less doesnot automatically mean that the accused is unfit to standtrial or is not accountable. It

  17. Calculation of Vibrational and Electronic Excited-State Absorption Spectra of Arsenic-Water Complexes Using Density Functional Theory

    Science.gov (United States)

    2016-06-03

    Naval Research Laboratory Washington, DC 20375-5320 NRL/MR/6390--16-9681 Calculation of Vibrational and Electronic Excited -State Absorption Spectra...NUMBER OF PAGES 17. LIMITATION OF ABSTRACT Calculation of Vibrational and Electronic Excited -State Absorption Spectra of Arsenic-Water Complexes Using...Unclassified Unlimited Unclassified Unlimited 59 Samuel G. Lambrakos (202) 767-2601 Calculations are presented of vibrational and electronic excited -state

  18. Stated Choice Experiments with Complex Ecosystem Changes: The Effect of Information Formats on Estimated Variances and Choice Parameters

    OpenAIRE

    Hoehn, John P.; Lupi, Frank; Kaplowitz, Michael D.

    2010-01-01

    Stated choice experiments about ecosystem changes involve complex information. This study examines whether the format in which ecosystem information is presented to respondents affects stated choice outcomes. Our analysis develops a utility-maximizing model to describe respondent behavior. The model shows how alternative questionnaire formats alter respondents’ use of filtering heuristics and result in differences in preference estimates. Empirical results from a large-scale stated choice e...

  19. A solid state NMR study of layered double hydroxides intercalated with para-amino salicylate, a tuberculosis drug

    DEFF Research Database (Denmark)

    Jensen, Nicholai Daugaard; Bjerring, Morten; Nielsen, Ulla Gro

    2016-01-01

    Para-amino salicylate (PAS), a tubercolosis drug, was intercalated in three different layered double hydroxides (MgAl, ZnAl, and CaAl-LDH) and the samples were studied by multi-nuclear (1H, 13C, and 27Al) solid state NMR (SSNMR) spectroscopy in combination with powder X-ray diffraction (PXRD....... Moreover, 13C MAS NMR and infra-red spectroscopy show that PAS did not decompose during synthesis. Large amounts (20-41%) of amorphous aluminum impurities were detected in the structure using 27Al single pulse and 3QMAS NMR spectra, which in combination with 1H single and double quantum experiments also...... showed that the M(II):Al ratio was higher than predicted from the bulk metal composition of MgAl-PAS and ZnAl-PAS. Moreover, the first high-resolution 1H SSNMR spectra of a CaAl LDH is reported and assigned using 1H single and double quantum experiments in combination with 27Al{1H} HETCOR....

  20. Spatial distribution of scorpions according to the socioeconomic conditions in Campina Grande,State of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Thassiany Sarmento Oliveira de Almeida

    Full Text Available Abstract: INTRODUCTION: Due to its frequency and morbidity, such as that caused by scorpions have achieved public health importance in certain regions of the world. The present exploratory ecological study aimed to characterize the epidemiological profile and spatial distribution of scorpion stings in Campina Grande, State of Paraíba in Northeastern Brazil. METHODS: Geographical information system techniques were used to record the scorpion stings, and Google Earth software, Track Maker, and ArcGIS 10 Esri were used as geocoding databases. The Moran test was used to evaluate spatial correlation, and the Pearson chi-square test was used to analyze associations between scorpion stings and socioeconomic variables. RESULTS: The study evaluated 1,466 scorpion stings. Envenomations were more frequent among women (n = 908, 61.9%, and most patients were aged 13-28 years (n = 428, 29.2%. The Southern region of the city had the largest number of registered cases (n = 548, 37.4%, followed by the Western region (n = 510, 34.8%. CONCLUSIONS: Spatial analysis of scorpionism revealed an irregular occurrence in Campina Grande. Further, no association was observed between the socioeconomic factors analyzed and the geographic location of the scorpion envenomations. Detection of spatial areas with an increased risk of scorpionism can help prioritize adoption of preventive measures in these regions to reduce the associated incidence and morbidity.

  1. Intermolecular potential and rovibrational states of the H2O–D2 complex

    International Nuclear Information System (INIS)

    Avoird, Ad van der; Scribano, Yohann; Faure, Alexandre; Weida, Miles J.; Fair, Joanna R.; Nesbitt, David J.

    2012-01-01

    Graphical abstract: H 2 O–D 2 potential surface and pH 2 O–oD 2 ground state wave function, for planar geometries. Highlights: ► The interaction between H 2 O and H 2 is of great astrophysical interest. ► The rovibrational states of H 2 O–D 2 were computed on an ab initio potential surface. ► Results are compared with the rovibrational states of H 2 O–H 2 computed recently. ► We measured the high-resolution infrared spectrum of H 2 O–D 2 in the H 2 O bend region. ► Comparison with the calculations provides information on H 2 O–H 2 potential surface. - Abstract: A five-dimensional intermolecular potential for H 2 O–D 2 was obtained from the full nine-dimensional ab initio potential surface of Valiron et al. [P. Valiron, M. Wernli, A. Faure, L. Wiesenfeld, C. Rist, S. Kedžuch, J. Noga, J. Chem. Phys. 129 (2008) 134306] by averaging over the ground state vibrational wave functions of H 2 O and D 2 . On this five-dimensional potential with a well depth D e of 232.12 cm −1 we calculated the bound rovibrational levels of H 2 O–D 2 for total angular momentum J = 0–3. The method used to compute the rovibrational levels is similar to a scattering approach—it involves a basis of coupled free rotor wave functions for the hindered internal rotations and the overall rotation of the dimer—while it uses a discrete variable representation of the intermolecular distance coordinate R. The basis was adapted to the permutation symmetry associated with the para/ortho (p/o) nature of both H 2 O and D 2 , as well as to inversion symmetry. As expected, the H 2 O–D 2 dimer is more strongly bound than its H 2 O–H 2 isotopologue [cf. A. van der Avoird, D.J. Nesbitt, J. Chem. Phys. 134 (2011) 044314], with dissociation energies D 0 of 46.10, 50.59, 67.43, and 73.53 cm −1 for pH 2 O–oD 2 , oH 2 O–oD 2 , pH 2 O–pD 2 , and oH 2 O–pD 2 . A rotationally resolved infrared spectrum of H 2 O–D 2 was measured in the frequency region of the H 2 O bend

  2. Effects of ligand substitution on the excited state dynamics of the Ru(dcbpy)(CO) 2I 2 complex

    Science.gov (United States)

    Lehtovuori, Viivi; Kallioinen, Jani; Myllyperkiö, Pasi; Haukka, Matti; Korppi-Tommola, Jouko

    2003-11-01

    Spectroscopic evidence suggest [PCCP 3 (2001) 1992] that illumination with visible light of the [ trans-I-Ru(dcbpy)(CO) 2I 2] (dcbpy= 4,4 '-dicarboxy-2,2 '-bipyridine) complex in solution induces dissociation of a CO group followed by reorganization of the ligands and attachment of a solvent molecule. In the present study, we report results on excited state dynamics of this ruthenium complex and its photoproduct. Femtosecond transient absorption measurements reveal dominance of excited state absorption of the reactant and the photoproduct [ cis-I-Ru(dcbpy)(CO)(Sol)I 2] (Sol=ethanol or acetonitrile) in the visible spectral region. The time-resolved measurements for the reactant at 77 K indicate interligand charge transfer from mixed Ru-I states to empty dcbpy orbitals. For the photoproduct, no such transfer was observed. In both complexes recovery from the lowest energy excited triplet state to the ground state occurs via two channels: radiative relaxation and a parallel barrier controlled non-radiative relaxation. The barrier is much higher in the reactant (about 850 cm -1) than in the product. A combination of DFT and ZINDO/CI calculations was used to estimate excited singlet and triplet spectra of the reactant and the product molecules. Calculated singlet-triplet difference spectra qualitatively match the observed transient spectra 500 fs after excitation supporting the idea that observed excited state relaxation occurs from the triplet states in both complexes.

  3. Effects of ligand substitution on the excited state dynamics of the Ru(dcbpy)(CO)2I2 complex

    International Nuclear Information System (INIS)

    Lehtovuori, Viivi; Kallioinen, Jani; Myllyperkioe, Pasi; Haukka, Matti; Korppi-Tommola, Jouko

    2003-01-01

    Spectroscopic evidence suggest [PCCP 3 (2001) 1992] that illumination with visible light of the [trans-I-Ru(dcbpy)(CO) 2 I 2 ] (dcbpy4,4 ' -dicarboxy-2,2 ' -bipyridine) complex in solution induces dissociation of a CO group followed by reorganization of the ligands and attachment of a solvent molecule. In the present study, we report results on excited state dynamics of this ruthenium complex and its photoproduct. Femtosecond transient absorption measurements reveal dominance of excited state absorption of the reactant and the photoproduct [cis-I-Ru(dcbpy)(CO)(Sol)I 2 ] (Sol=ethanol or acetonitrile) in the visible spectral region. The time-resolved measurements for the reactant at 77 K indicate interligand charge transfer from mixed Ru-I states to empty dcbpy orbitals. For the photoproduct, no such transfer was observed. In both complexes recovery from the lowest energy excited triplet state to the ground state occurs via two channels: radiative relaxation and a parallel barrier controlled non-radiative relaxation. The barrier is much higher in the reactant (about 850 cm -1 ) than in the product. A combination of DFT and ZINDO/CI calculations was used to estimate excited singlet and triplet spectra of the reactant and the product molecules. Calculated singlet-triplet difference spectra qualitatively match the observed transient spectra 500 fs after excitation supporting the idea that observed excited state relaxation occurs from the triplet states in both complexes

  4. A novel method of complex evaluation of meibomian glands morphological and functional state

    Directory of Open Access Journals (Sweden)

    V. N. Trubilin

    2014-01-01

    Full Text Available A novel method that provides complex assessment of meibomian glands morphological and functional state — biometry of meibomian glands — was developed. The results of complex examination (including meibomian glands biometry, correlation analysis data and clinical findings demonstrate direct association between the objective (i.e., meibomian glands dysfunction by biomicroscopy, tear film break-up time / TBUT, symptomatic TBUT, compression testing and subjective signs of meibomian glands dysfunction (patient’s complaints and the parameters of meibomian glands biometry. High direct correlation between biometrical index and compression test result was revealed (p = 0.002, Spearman’s rank correlation coefficient = 0.6644. Meibomian glands dysfunction is characterized by biometric parameters abnormalities, i.e., dilatation of meibomian glands orifices, decrease of distance between meibomian glands orifices, partial or total atrophy of meibomian glands (even up to gland collapse with its visual reduction and increase of distance between the glands. The suppression of inflammatory process and the recovery of meibomian glands secretion improve biometric parameters and result in the opening of meibomian glands orifices, liquefaction of clogs, evacuation of meibomian glands secretion, narrowing of meibomian glands orifices and increase of distance between them. The proposed method expands the armamentarium of meibomian glands dysfunction and lipid-deficient dry eye diagnosing. Meibomian glands biometry can be applied in specialized ophthalmological hospitals and outpatient departments. It is a simple procedure of short duration that does not require any special equipment or professional skills. Meibomian glands biometry enables to prescribe pathogenically targeted therapy and to improve quality of life. 

  5. Capture techniques' use of Caranguejo-uçá crabs (Ucides cordatus in Paraíba state (northeastern Brazil and its socio-environmental implications

    Directory of Open Access Journals (Sweden)

    Douglas M. Nascimento

    2012-12-01

    Full Text Available The present study was undertaken in two traditional communities that are located on the margins of the estuary and mangrove complex of the Mamanguape River, Paraíba state (PB, Brazil. This work describes the crabs capture techniques tapamento and redinha, and identifies the negative socio-environmental impacts of redinha, using qualitative methods (open and semi-structured interviews, guided tours, direct observation and the administration of questionnaires. Results indicate that currently only two principle techniques are used to capture Ucides cordatus: redinha and tapamento. Tapamento has a low impact in relation to redinha. Redinha was pointed out by interviewees as a system that has social impact (social conflicts, breaking of traditions, substitution and extinction of techniques and environmental impact (less selective captures and high productivity, mangrove pollution, death of crabs caught in traps, cutting of the roots of Rhizophora mangle, micro-habitat loss resulting from galleries destroyed and polluted. Knowledge of crab harvesting carried out using these two techniques and the possible social and environmental impacts caused by redinha, can lead to more effective planning and actions towards the conservation of the species.O estudo foi realizado em duas comunidades tradicionais localizadas às margens do complexo estuário-manguezal do rio Mamanguape, Paraíba (PB, Brasil. Foram descritas as técnicas de captura (tapamento e redinha, identificando os impactos socioambientais negativos provocados pela redinha na captura de caranguejos, utilizando métodos qualitativos (entrevistas abertas e semiestruturadas, turnês guiadas, observação direta e questionários. Os resultados indicaram que atualmente apenas estas técnicas são usadas na captura de Ucides cordatus. O tapamento apresenta baixo impacto em relação à redinha, que é apontada pelos entrevistados como causadora de impactos sociais (conflitos sociais, rompimento de

  6. Rb/Sr geochronology in whole rocks and minerals of the Cumaru granodiorite, Serra dos Gradaus, Para state, Brazil

    International Nuclear Information System (INIS)

    Lafon, J.M.; Scheller, T.; Pereira, E.D.; Macambira, J.B.

    1990-01-01

    The Cumaru granodiorite occurs in the Serra dos Gradaus region, southeastern part of the Metallogenic Province of Carajas, Para. Rb-Sr systematics have been provided in whole rocks and minerals for samples of the Cumaru granodiorite thus an age of 2543 ± 53 Ma, with an initial isotopic ratio of 0.70311 ± 34 (MSWD+1.87) was obtained for whole rocks samples. Taking in account that these rocks are not affected by metamorphism and/or deformation, we consider the age of 2543 ± 53 Ma as an emplacement age corresponding to the crystallization of the body. Such an age confirms the existence of a late Archaean plutonic event in the Serra dos Gradaus area and the interpretation of the Cumaru granodiorite as a contemporaneous and cogenetic body of the Juruena type granites (Ca. 2000 Ma old), as proposed previously, must be definitively abandoned. Therefore, Archaean ages for the greenstone belt sequence (Gradaus group) as well as for the Xingu complex in this area are also confirmed, although by indirect evidence. The age obtained implies that the latter represents an Archaean metamorphic basement in the Serra dos Gradaus region rather than the reworking of the late archaean granitics rocks during the Transmazonian orogenic event. The initial isotopic ratio of 0.70311 ± 34 is close to a mantellic or low time of crustal residence source material ratios at the end of Archaean times. Therefore, comparison with isotopic initial ratios of other granitic rocks which occur in the Rio Maria region identifies an evolution line with a Rb-Sr ratio of 0.25 for a crustal source material that would have separated from mantle about 2.8 Ga ago. (author)

  7. FLOODPLAIN-CHANNEL COMPLEX OF SMALL RIVER: ASSESSMENT OF CURRENT STATE, OPTIMIZATION MEASURES

    Directory of Open Access Journals (Sweden)

    Kovalchuk I.

    2016-05-01

    Full Text Available The article describes main methodological principles of geoecological assessment of riverbed-floodplain complex condition of one of the small rivers in Ukrainian Carpathians. According to our long-term field, cartographic, laboratory and remote sensing research, division of riverbed into homogeneous geoecological segments was made, as well as their standardization in accordance to the trends of unfavorable processes. Main reasons for deterioration of quality characteristics of channel-floodplain river complex were outlined; the role of natural and anthropogenic factors in deterioration of geoecological condition of the river and its floodplain complex was analyzed. Based on the assessment results it is possible to state that the condition of study segments of the Berezhnytsya river flood-plain and stream-way complex was marked as “excellent”, “good” and “satisfactory”. “Unsatisfactory” and “catastrophic” river and flood-plain condition has not been detected yet, although within Dashava urban settlement the river area condition is close to the “satisfactory” grade. The best situation is at the river head as human impact is minimized here and natural vegetation is preserved. Downstream we trace the tendency of condition worsening as anthropogenic load on the basin system and flood-plain and stream-way complex increases. Its negative impact is balanced by large forests, thus in segments limited by Banya Lysovytska village and Lotatnyky village the river and flood-plain condition is rated as “good”. So, downstream from the named village the value of such an important natural barrier as forest is reducing and anthropogenic load on the river significantly increases. The latter manifests in an intensive agricultural reclamation and housing development of flood-plains. Since degradation processes are rapidly developing over a considerable part of the Berezhnytsya river, negative changes are visible and only the study area

  8. WNT Stimulation Dissociates a Frizzled 4 Inactive-State Complex with Gα12/13.

    Science.gov (United States)

    Arthofer, Elisa; Hot, Belma; Petersen, Julian; Strakova, Katerina; Jäger, Stefan; Grundmann, Manuel; Kostenis, Evi; Gutkind, J Silvio; Schulte, Gunnar

    2016-10-01

    Frizzleds (FZDs) are unconventional G protein-coupled receptors that belong to the class Frizzled. They are bound and activated by the Wingless/Int-1 lipoglycoprotein (WNT) family of secreted lipoglycoproteins. To date, mechanisms of signal initiation and FZD-G protein coupling remain poorly understood. Previously, we showed that FZD6 assembles with Gαi1/Gαq (but not with Gαs, Gαo and Ga12/13), and that these inactive-state complexes are dissociated by WNTs and regulated by the phosphoprotein Dishevelled (DVL). Here, we investigated the inactive-state assembly of heterotrimeric G proteins with FZD4, a receptor important in retinal vascular development and frequently mutated in Norrie disease or familial exudative vitreoretinopathy. Live-cell imaging experiments using fluorescence recovery after photobleaching show that human FZD4 assembles-in a DVL-independent manner-with Gα12/13 but not representatives of other heterotrimeric G protein subfamilies, such as Gαi1, Gαo, Gαs, and Gαq The FZD4-G protein complex dissociates upon stimulation with WNT-3A, WNT-5A, WNT-7A, and WNT-10B. In addition, WNT-induced dynamic mass redistribution changes in untransfected and, even more so, in FZD4 green fluorescent protein-transfected cells depend on Gα12/13 Furthermore, expression of FZD4 and Gα12 or Gα13 in human embryonic kidney 293 cells induces WNT-dependent membrane recruitment of p115-RHOGEF (RHO guanine nucleotide exchange factor, molecular weight 115 kDa), a direct target of Gα12/13 signaling, underlining the functionality of an FZD4-Gα12/13-RHO signaling axis. In summary, Gα12/13-mediated WNT/FZD4 signaling through p115-RHOGEF offers an intriguing and previously unappreciated mechanistic link of FZD4 signaling to cytoskeletal rearrangements and RHO signaling with implications for the regulation of angiogenesis during embryonic and tumor development. Copyright © 2016 by The American Society for Pharmacology and Experimental Therapeutics.

  9. Rotational state modification and fast ortho-para conversion of H2 trapped within the highly anisotropic potential of Pd(210)

    Science.gov (United States)

    Ohno, S.; Ivanov, D.; Ogura, S.; Wilde, M.; Arguelles, E. F.; Diño, W. A.; Kasai, H.; Fukutani, K.

    2018-02-01

    The rotational state and ortho-para conversion of H2 on a Pd(210) surface is investigated with rotational-state-selective temperature-programmed desorption (RS-TPD) and theoretical calculations. The isotope dependence of TPD shows a higher desorption energy for D2 than that for H2, which is ascribed to the rotational and zero-point vibrational energies. The RS-TPD data show that the desorption energy of H2(J =1 ) (J : rotational quantum number) is higher than that of H2(J =0 ). This is due to the orientationally anisotropic potential confining the adsorbed H2, which is in agreement with theoretical calculations. Furthermore, the H2 desorption intensity ratio in J =1 and J =0 indicates fast ortho-para conversion in the adsorption state, which we estimate to be of the order of 1 s.

  10. Ensino médio estatal: menos verba para mais alunos? State secondary education: less funs for more students?

    Directory of Open Access Journals (Sweden)

    Nicholas Davies

    2004-03-01

    Full Text Available O artigo traça um panorama de alguns desafios estruturais e conjunturais para o financiamento da educação estatal, em particular o ensino médio, mostrando que a tendência dos governos tem sido no sentido de gastar menos por aluno, apesar dos discursos oficiais de exaltação da qualidade do ensino. Entre os desafios estruturais, incluem-se o privatismo direto e indireto das políticas oficiais, o descumprimento da exigência de aplicação da verba vinculada à manutenção e ao desenvolvimento do ensino, a perda de recursos vinculados causada pela inflação e pelas medidas de política fiscal, e a pouca confiabilidade dos Tribunais de Contas. Entre os desafios conjunturais, analisamos o Fundo de Manutenção e Desenvolvimento do Ensino Fundamental e de Valorização do Magistério (Fundef, que deixa de fora o ensino médio; a reduzida contribuição federal para o ensino médio; e a fragilidade da proposta do PNE (Plano Nacional de Educação e o uso 'judicioso' do dinheiro público. Por fim, examinamos as perspectivas - pouco animadoras - de financiamento da educação no governo Lula: a ênfase do governo no 'ajuste fiscal', cuja conseqüência foi a diminuição, em termos reais, das verbas para a educação em 2003; e as virtudes e os limites do Fundeb (Fundo da Educação Básica.The article provides an overview of some structural and conjunctural challenges for the funding of State education, particularly secondary education (the 3 years of schooling offered after the 8-year period of compulsory education, showing that the trend of governments has been to spend less per pupil, despite the official discourses exhalting the quality of education. The structural challenges examined include direct and indirect privatism of government policies, the non-compliance of a constitucional requirement that a certain percentage of taxes be invested in education, the loss of funds linked to education caused by inflation and fiscal policies, and

  11. INVESTMENT ACTIVITY OF AGRIBUSINESS IN THE AGROINDUSTRIAL COMPLEX REGION, AS ONE OF THE ELEMENTS OF THE FINANCIAL SECURITY OF THE AGRO-INDUSTRIAL COMPLEX OF THE STATE

    Directory of Open Access Journals (Sweden)

    Olga Nikolaevna Uglitskikh

    2015-09-01

    Full Text Available The developed economic-political situation around of Russia, specifies an indispensability of support of agricultural commodity producers as from their financial well-being, investment activity the financial security of agrarian and industrial complex of the state depends. Limitation of own financial resources at agrarians does not allow them to realize independently conceived projects. Studying of questions of formation and functioning of investment activity in agriculture of Stavropol Territory and an assessment of investment projects offered to reali-zation, have allowed to analyse investment activity of agrarian and industrial complex of region up to the introduction of Russia into WTO and in conditions of its membership. By results of the lead assessment the administrative areas of region showing the greatest investment activity, threats of a financial security of agrarian and industrial complex of region not putting by the activity have been revealed. It is drawn a conclusion on influence West-American sanctions on financial without-danger agra-rian and industrial complex of the state and the responsibility сельхозтоваропроизводителей about delivery of agricultural production in necessary volume and import substitution.

  12. Tradução e validação para o português do Medication Regimen Complexity Index Translation and validation into portuguese Language of the Medication Regimen Complexity Index

    Directory of Open Access Journals (Sweden)

    Ana Carolina Melchiors

    2007-10-01

    Full Text Available FUNDAMENTO: A complexidade da farmacoterapia consiste de múltiplas características do regime prescrito, incluindo o número de diferentes medicações no esquema, o número de unidades de dosagem por dose, o número total de doses por dia e os cuidados na administração dos medicamentos. O Medication Regimen Complexity Index (MRCI é um instrumento específico, validado e utilizado para medir a complexidade da farmacoterapia, desenvolvido originalmente em língua inglesa. OBJETIVO: Tradução transcultural e validação desse instrumento para o português do Brasil. MÉTODOS: Foi desenvolvido um estudo transversal envolvendo 95 pacientes com diabete do tipo 2 utilizando múltiplas medicações. O processo de validação teve início pela tradução, retrotradução e pré-teste do instrumento, gerando uma versão adaptada chamada Índice de Complexidade da Farmacoterapia (ICFT. Em seguida foram analisados parâmetros psicométricos, incluindo validade convergente, validade divergente, confiabilidade entre avaliadores e teste-reteste. RESULTADOS: A complexidade da farmacoterapia medida pelo ICFT obteve média de 15,7 pontos (desvio padrão = 8,36. O ICFT mostrou correlação significativa com o número de medicamentos em uso (r = 0,86; p BACKGROUND: The complexity of pharmacotherapy is a result of a multiplicity of prescribed regimen factors, including the number of different drugs in the regimen, the number of dosage units per dose, the total number of prescribed doses per day and administration instructions. The Medication Regimen Complexity Index (MRCI is a specific, reliable and valid tool used to measure the complexity of pharmacotherapy, originally developed in English language. OBJECTIVE: Transcultural translation and validation of this tool into Brazilian Portuguese. METHODS: A cross-sectional study was developed with 95 type-2 diabetes patients, receiving multiple medications. The validation process included translation into

  13. [Triatoma vandae sp.n. of the oliveirai complex from the State of Mato Grosso, Brazil (Hemiptera: Reduviidae: Triatominae)].

    Science.gov (United States)

    Carcavallo, Rodolfo U; Jurberg, José; Rocha, Dayse da Silva; Galvao, Cleber; Noireau, François; Lent, Herman

    2002-07-01

    There are several specific complexes belonging to the genus Triatoma Laporte, 1832, which are generally associated to specific geographic areas. Recent publications have linked the oliveirai complex to ecosystems of Mato Grosso, which are also present in other Brazilian states and even in other bordering countries as eastern Paraguay. The study of the abundant material collected during the last years allowed the description of several new species of the oliveirai complex: T. jurbergi Carcavallo, Galvão Lent, 1998; T. baratai Carcavallo Jurberg, 2000 and T. klugi Carcavallo, Jurberg, Lent Galvão, 2001. Another new species belonging to the same complex is described here as T. vandae sp.n. It originates from the state of Mato Grosso, and has been reared in the insectary of the Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Departamento de Entomologia, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro.

  14. Utilização de complexo enzimático em rações para codornas de corte = Enzymatic complex utilization in meat type quail feed

    Directory of Open Access Journals (Sweden)

    Cláudio Scapinello

    2011-07-01

    Full Text Available Foram conduzidos dois experimentos com o objetivo de avaliar os efeitos da suplementacao enzimatica das racoes a base de milho e farelo de soja sobre o desempenho e metabolizabilidade dos nutrientes em codornas de corte. Os tratamentos foram: controle positivo para atendimento das exigencias; controle positivo suplementado com complexo enzimatico e controles negativos suplementados reduzidos em 2 e 4% nos teores de energia metabolizavel e aminoacidos. Na fase inicial, observou-se aumento no consumo de racao (p 0,05. Conclui-se que o complexo enzimatico pode ser utilizado em dietas reduzidas em energia metabolizavel e aminoacidos sem prejudicar o desempenho de codornas de corte. No ensaio de metabolismo, nao foram observadas diferencas (p > 0,05 entre os tratamentos para os coeficientes de metabolizacao das materias seca e organica, proteina bruta e energia bruta. Ocoeficiente de metabolizacao da FDN melhorou (p Two experiments were carried out to evaluate the effects of enzyme supplementation (xylanase + ƒÀ-glucanase of diets based on corn and soybean meal on: performance in initial (1-14 days and growing (15-35 days phases, and nutrient metabolization of meat-type quails. The treatments were: positive control to meet the nutritional requirements of the specie; positive control supplemented with enzyme complex; and negative controls with two reduced supplementation levels of metabolizable energy and amino acids (by 2% and 4%. In the initial phase, the negative control treatment reduced by 4% of metabolizable energy and amino acids increased feed intake (p 0.05 in feed intake, feed conversion ratio and carcass traits. In conclusion, this supplementation can be used successfully in diets with reduced metabolizable energy and amino acid contents for meat-type quails. In the metabolism trial, there were no differences (p > 0.05 in metabolizable coefficients of drymatter, organic matter, crude protein and gross energy among treatments. The

  15. Natural radionuclides in the Brazilian coast region: 1. Estuarine complex Cananeia-Iguape, Sao Paulo State

    Energy Technology Data Exchange (ETDEWEB)

    Franca, E.J. de; Ferreira, Fabiano S.; Silva Neto, Paulo C.; Farias, Emerson E.G. de; Figueira, Rubens C.L.; Ribeiro, Andreza P., E-mail: ejfranca@cnen.gov.br, E-mail: biologofabiano10@gmail.com, E-mail: ptpoli@yahoo.com.br, E-mail: emersonemiliano@yahoo.com.br [Centro Regional de Ciencias Nucleares do Nordeste (CRCN-NE/CNEN-PE), Recife, PE (Brazil)

    2015-07-01

    Mangrove forests are of utmost important ecosystems for biogeochemical transport processes in a global scale because of the preferential transport via sediments and organic matter from continents to oceans. Such ecosystems are the richest biodiversity areas, in which bioaccumulation of chemical substances can be expected for some species, in this case, there is a lack of knowledge of natural radionuclides accumulation in mangrove vegetation. This work encompasses the first results obtained for the Estuarine Complex Cananeia-Iguape, a peculiar coast area of the Sao Paulo State, Brazil. In 2011, leaf samples of Rhyzophora mangle and Laguncularia racemosa trees with perimeter at the breast height higher than 15 cm were collected in the conservation unit Parque Estadual Ilha do Cardoso. Sample preparation consisted of leaf washing, oven-drying, milling in porcelain mortar at the particle size lower than 0.5 mm. Portions of 10 g were transferred to polyethylene vials of appropriate geometry for the analysis by high resolution gamma-ray spectrometry. Reference materials were analyzed together to evaluate the quality of the analytical procedure. K-40 was preferentially allocated in leaves. Some accumulation in leaves was noticed for Pb-210 and Ac-228 depending on the species, indicating differences of radionuclide distribution in the mangrove vegetation. (author)

  16. STATE OF THE ART TECHNIQUES USED FOR NOISE SOURCE IDENTIFICATION ON COMPLEX BODIES

    Directory of Open Access Journals (Sweden)

    Corneliu STOICA

    2010-03-01

    Full Text Available Over the last few decades, many approaches have been undertaken in order to asses detailed noise source identification on complex bodies, i.e. aircrafts, cars, machinery. Noise source identification implies to accurately obtain the position and frequency of the dominant noise sources. There are cases where traditional testing methods can not be applied at all or their use involves some limitations. Optical systems used for near field analysis require a line of sight that may not be available. The state-of-the-art technology for this purpose is the use of a large number of microphones whose signals are acquired simultaneously, i.e. microphone phased array. Due to the excessive cost of the instruments and the data acquisition system required, the implementation of this technology was restricted to governmental agencies (NASA, DLR and big companies such as Boeing and Airbus. During the past years, this technique was developed in wind tunnels and some universities to perform noise source identification on scale airframes, main landing gear models, and aerodynamic profiles (used on airplanes, helicopter rotors and wind mills.

  17. Decamethylytterbocene Complexes of Bipyridines and Diazabutadienes: Multiconfigurational Ground States and Open-Shell Singlet Formation

    Energy Technology Data Exchange (ETDEWEB)

    Booth, Corwin H.; Walter, Marc D.; Kazhdan, Daniel; Hu, Yung-Jin; Lukens, Wayne W.; Bauer, Eric D.; Maron, Laurent; Eisenstein, Odile; Andersen, Richard A.

    2009-04-22

    Partial ytterbium f-orbital occupancy (i.e., intermediate valence) and open-shell singlet formation are established for a variety of bipyridine and diazabutadiene adducts with decamethylytterbocene, (C5Me5)2Yb, abbreviated as Cp*2Yb. Data used to support this claim include ytterbium valence measurements using Yb LIII-edge X-ray absorption near-edge structure spectroscopy, magnetic susceptibility, and complete active space self-consistent field (CASSCF) multiconfigurational calculations, as well as structural measurements compared to density functional theory calculations. The CASSCF calculations indicate that the intermediate valence is the result of a multiconfigurational ground-state wave function that has both an open-shell singlet f13(?*)1, where pi* is the lowest unoccupied molecular orbital of the bipyridine or dpiazabutadiene ligands, and a closed-shell singlet f14 component. A number of other competing theories for the unusual magnetism in these materials are ruled out by the lack of temperature dependence of the measured intermediate valence. These results have implications for understanding chemical bonding not only in organolanthanide complexes but also for f-element chemistry in general, as well as understanding magnetic interactions in nanoparticles and devices.

  18. Decamethylytterbocene complexes of bipyridines and diazabutadines: multiconfigurational ground states and open-shell singlet formation

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, Eric D [Los Alamos National Laboratory; Booth, C H [LBNL; Walter, M D [LBNL; Kazhdan, D [LBNL; Hu, Y - J [LBNL; Lukens, Wayne [LBNL; Maron, Laurent [INSA TOULOUSE; Eisentein, Odile [UNIV MONTPELLIER 2; Anderson, Richard [LBNL

    2009-01-01

    Partial ytterbium f-orbital occupancy (i.e. intermediate valence) and open-shell singlet Draft 12/formation are established for a variety of bipyridine and diazabutadiene adducts to decamethylytterbocene, (C{sub 5}Me{sub 5}){sub 2}Yb or Cp*{sub 2}Yb. Data used to support this claim includes ytterbium valence measurements using Yb Lm-edge x-ray absorption near-edge structure (XANES) spectroscopy, magnetic susceptibility and Complete Active Space Self-Consistent Field (CASSCF) multi configurational calculations, as well as structural measurements compared to density-functional theory (DFT) calculations. The CASSCF calculations indicate that the intermediate valence is the result of a multiconfigurational ground state wave function that has both an open-shell singlet f{sup 13} and a closed-shell singlet f{sup 14} component. A number of other competing theories for the unusual magnetism in these materials are ruled out by the presence of intermediate valence and its lack of any significant temperature dependence. These results have implications for understanding chemical bonding not only in organolanthanide complexes, but also for organometallic chemistry in general, as well as understanding magnetic interactions in nanopartic1es and devices.

  19. Natural radionuclides in the Brazilian coast region: 1. Estuarine complex Cananeia-Iguape, Sao Paulo State

    International Nuclear Information System (INIS)

    Franca, E.J. de; Ferreira, Fabiano S.; Silva Neto, Paulo C.; Farias, Emerson E.G. de; Figueira, Rubens C.L.; Ribeiro, Andreza P.

    2015-01-01

    Mangrove forests are of utmost important ecosystems for biogeochemical transport processes in a global scale because of the preferential transport via sediments and organic matter from continents to oceans. Such ecosystems are the richest biodiversity areas, in which bioaccumulation of chemical substances can be expected for some species, in this case, there is a lack of knowledge of natural radionuclides accumulation in mangrove vegetation. This work encompasses the first results obtained for the Estuarine Complex Cananeia-Iguape, a peculiar coast area of the Sao Paulo State, Brazil. In 2011, leaf samples of Rhyzophora mangle and Laguncularia racemosa trees with perimeter at the breast height higher than 15 cm were collected in the conservation unit Parque Estadual Ilha do Cardoso. Sample preparation consisted of leaf washing, oven-drying, milling in porcelain mortar at the particle size lower than 0.5 mm. Portions of 10 g were transferred to polyethylene vials of appropriate geometry for the analysis by high resolution gamma-ray spectrometry. Reference materials were analyzed together to evaluate the quality of the analytical procedure. K-40 was preferentially allocated in leaves. Some accumulation in leaves was noticed for Pb-210 and Ac-228 depending on the species, indicating differences of radionuclide distribution in the mangrove vegetation. (author)

  20. On the role of the ground state Tb(3)/acetylacetone complex in sensitized emission of Tb(3) in ethanol solution

    International Nuclear Information System (INIS)

    Lis, S.; Elbanowski, M.; Marciniak, B.

    1989-01-01

    The Tb(3)-acetylacetone system in ethanol solution has been studied by spectroscopic methods. The formation of a Tb(3)/acetylacetone (1:1) complex in the ground state has been proved and its stability constant determined, K = (0,97 ± 0,06).10 4 dm 3 mol -1 . The role of this complex in the spectrofluorimetric determination of Ln(3) ions in the presence of acetylacetone has been discussed. (Authors)

  1. Effects of excited state mixing on transient absorption spectra in dimers Application to photosynthetic light-harvesting complex II

    CERN Document Server

    Valkunas, L; Trinkunas, G; Müller, M G; Holzwarth, A R

    1999-01-01

    The excited state mixing effect is taken into account considering the difference spectra of dimers. Both the degenerate (homo) dimer as well as the nondegenerate (hetero) dimer are considered. Due to the higher excited state mixing with the two-exciton states in the homodimer, the excited state absorption (or the difference spectrum) can be strongly affected in comparison with the results obtained in the Heitler-London approximation. The difference spectrum of the heterodimer is influenced by two resonance effects (i) mixing of the ground state optical transitions of both monomers in the dimer and (ii) mixing of the excited state absorption of the excited monomer with the ground state optical transition in the nonexcited monomer. These effects have been tested by simulating the difference absorption spectra of the light-harvesting complex of photosystem II (LHC II) experimentally obtained with the 60 fs excitation pulses at zero delay times and various excitation wavelengths. The pairs of coupled chlorophylls...

  2. Coherent states of the real symplectic group in a complex analytic parametrization. I. Unitary-operator coherent states

    International Nuclear Information System (INIS)

    Quesne, C.

    1986-01-01

    In the present series of papers, the coherent states of Sp(2d,R), corresponding to the positive discrete series irreducible representations 1 +n/2> encountered in physical applications, are analyzed in detail with special emphasis on those of Sp(4,R) and Sp(6,R). The present paper discusses the unitary-operator coherent states, as defined by Klauder, Perelomov, and Gilmore. These states are parametrized by the points of the coset space Sp(2d,R)/H, where H is the stability group of the Sp(2d,R) irreducible representation lowest weight state, chosen as the reference state, and depends upon the relative values of lambda 1 ,...,lambda/sub d/, subject to the conditions lambda 1 > or =lambda 2 > or = x x x > or =lambda/sub d/> or =0. A parametrization of Sp(2d,R)/H corresponding to a factorization of the latter into a product of coset spaces Sp(2d,R)/U(d) and U(d)/H is chosen. The overlap of two coherent states is calculated, the action of the Sp(2d,R) generators on the coherent states is determined, and the explicit form of the unity resolution relation satisfied by the coherent states in the representation space of the irreducible representation is obtained. The Hilbert space of analytic functions arising from the coherent state representation is studied in detail. Finally, some applications of the formalism developed in the present paper are outlined

  3. Meliponiculture in Quilombola communities of Ipiranga and Gurugi, Paraíba state, Brazil: an ethnoecological approach

    Science.gov (United States)

    2014-01-01

    Background The Quilombola communities of Ipiranga and Gurugi, located in Atlantic Rainforest in Southern of Paraíba state, have stories that are interwoven throughout time. The practice of meliponicultura has been carried out for generations in these social groups and provides an elaborate ecological knowledge based on native stingless bees, the melliferous flora and the management techniques used. The traditional knowledge that Quilombola have of stingless bees is of utmost importance for the establishment of conservation strategies for many species. Methods To deepen study concerning the ecological knowledge of the beekeepers, the method of participant observation together with structured and semi-structured interviews was used, as well as the collection of entomological and botanical categories of bees and plants mentioned. With the aim of recording the knowledge related to meliponiculture previously exercised by the residents, the method of the oral story was employed. Results and discussion Results show that the informants sampled possess knowledge of twelve categories of stingless bees (Apidae: Meliponini), classified according to morphological, behavioral and ecological characteristics. Their management techniques are represented by the making of traditional cortiço and the melliferous flora is composed of many species predominant in the Atlantic Rainforest. From recording the memories and recollections of the individuals, it was observed that an intricate system of beliefs has permeated the keeping of uruçu bees (Melipona scutellaris) for generations. Conclusion According to management techniques used by beekeepers, the keeping of stingless bees in the communities is considered a traditional activity that is embedded within a network of ecological knowledge and beliefs accumulated by generations over time, and is undergoing a process of transformation that provides new meanings to such knowledge, as can be observed in the practices of young people. PMID

  4. SIGNIFICADOS DE LA PALABRA "ESPARCIMIENTO" PARA ESTUDIANTES DE LA UNIVERSIDAD DE COSTA RICA Y DE MONTCLAIR STATE UNIVERSITY

    Directory of Open Access Journals (Sweden)

    Susana Juniu

    2010-01-01

    Full Text Available El esparcimiento y la recreación frecuentemente se definen de manera individual y, por lo tanto, no se entienden o interpretan universalmente. Los diferentes contextos culturales pueden originar distintas definiciones o significados de esparcimiento. El reto de las personas que estudian el esparcimiento es interpretarlo de tal forma que ayude a las personas a entender acerca de su valor en la calidad de vida. Por consiguiente, este estudio examinó el significado de esparcimiento para estudiantes de un curso de estudios generales de la Universidad de Costa Rica (UCR y de Montclair State University (MSU, una universidad estatal del noreste de Estados Unidos, en el I ciclo lectivo del 2009. Las personas participantes fueron 388 estudiantes (149 hombres y 240 mujeres, promedio edad = 21 años, DE = 3.3 del curso de Actividad Deportiva, de carreras de grado de ambas universidades. El estudiantado contestó el Inventario de Significados de Esparcimiento (Schulz y Watkins, 2007. Este cuestionario incluye cuatro categorías: pasar el tiempo, escapar de presiones, tomar decisiones y lograr autorrealización. En términos generales, las diferencias estadísticamente significativas entre los grupos universitarios se relacionaron con el concepto de esparcimiento como "pasar el tiempo" y "tomar decisiones". Las percepciones de esparcimiento como "escapar de presiones" y "lograr autorrealización" sólo fueron el resultado de diferencias estadísticas significativas de casos específicos. Los resultados indican que los estudiantes de MSU tienden más a percibir esparcimiento como "pasar el tiempo" y "tomar decisiones" que la contraparte costarricense.

  5. Patterns and inferred processes associated with sea turtle strandings in Paraíba State, Northeast Brazil

    Directory of Open Access Journals (Sweden)

    C. Poli

    Full Text Available This study analysed sea turtle strandings on the coast of Paraíba State, Northeastern Brazil, from August 2009 to July 2010. A total of 124 strandings were recorded in this period: green turtle Chelonia mydas (n = 106, hawksbill Eretmochelys imbricata (n = 15, olive ridley Lepidochelys olivacea (n = 2 and loggerhead Caretta caretta (n = 1. Of all turtles for which the Curved Carapace Length (CCL was measured (n = 122, only 12 individuals (9.7% were adults. Twenty individuals had synthetic anthropogenic debris in the gastrointestinal tract. Other traces of human interactions were observed in 43 individuals, such as injuries caused by entanglement in fishing lines or nets, collisions with vessels, direct contact with oil spills and lesions caused by sharp or spiked objects. Moreover, in 28.5% of the stranded turtles, the presence of external tumors was noticed, suggestive of fibropapillomatosis and in 9.7%, shark bite marks were observed. Of the 107 individuals that were sexed, 76 were females and 31 were males. Most turtles (72.6% became stranded during the spring/summer (between October and March. We found evidence of human interactions (injuries in half of the strandings, but in most cases it was not possible to determine if such interactions were the cause of death. A logistic regression found a significant relationship between CCL, ingestion of debris and lesions caused by sharks or spiked objects. Systematic data collection from stranded sea turtles can provide useful biological information, such as seasonal and spatial patterns in their occurrence and mortality, age structure, sex ratio and diet, as well as possible mortality causes.

  6. Petrological study of the eastern part of Rio Maria batholith located in the SE of Para State

    International Nuclear Information System (INIS)

    Medeiros, H. de.

    1987-01-01

    This work is a petrological and geochronological study in the eastern part of Rio Maria batholith located in the SE of Para State (Brazil), in which granodioritic composition predominates. Selected samples including all varieties present in the eastern portion of Rio Maria granodioritic batholith were analyzed for major, minor and some trace elements. The results suggest two differentiation trends. The first is (BHGd + HBGd) - HBM sub(z)G, with decrease in CaO, TiO sub(2), Fe total, MgO and Sr contents, whereas K2O and Rb increase. The second trend is (BHGd + HBGd) - BGd, where the BGd have the highest values of SiO sub(2), and low CaO, TiO sub(2), Fe total, MgO and Sr contents. This results are in agreement with that obtained to the calc-alkaline rock series. Six selected samples, including all varieties, were dated by the Rb/Sr Whole-rock method, producing a isochronic age of 2564 +- 68 m.y. with an initial Sr sup(87)/Sr sup(86) ratio of 0.70288 +- 00092. The crystallization sequence proposed to the BHGd and BHGd, when correlated to the experimental results obtained in the rocks of granodioritic composition, suggests that the magma crystallization was in low pressure conditions (2 to 4kb). The temperature interval would be between 950 and +- 700 sup(0)C. The best explanation to the granodioritic magma origin is by partial fusion in the crustal base, with contribution of mantle material or not. The association of the rock units, including granodiorites, trondhjemites, meta-volcan-sedimentary sequences and gneisses of tonalitic to granodioritic composition observed in the Rio Maria region, and the Archaeyan ages obtained by the Rb/Sr method suggest that this region can be correlated with granite-greenstone terrains exposed in the Rhodesian, Kaapvaal and western Australia cratons. (author)

  7. Impacto do aquecimento global no cultivo do feijão-caupi, no Estado da Paraíba Impact of global warming on the cowpea cultivation in the State of Paraíba

    Directory of Open Access Journals (Sweden)

    João H. B. da C. Campos

    2010-04-01

    Full Text Available No presente estudo se avaliam os impactos da mudança do clima com base nos relatórios do Painel Intergovernamental em Mudanças do Clima (IPCC, no zoneamento agrícola de riscos climáticos para a cultura do feijão-caupi (Vigna unguiculata L. Walp cultivado em sistema de sequeiro, no Estado da Paraíba. Utilizou-se o modelo do balanço hídrico associado a técnicas de geoprocessamento, e se objetivou a identificação das regiões do Estado em que a cultura do feijão-caupi sofrerá restrições em face das mudanças climáticas. As variáveis consideradas no modelo foram precipitação pluvial, coeficientes de cultura, evapotranspiração potencial e duração das fases fenológicas da cultura. Adotou-se, como limite para o índice de satisfação da necessidade de água para a cultura (ISNA, o valor de 0,50. A data foi considerada adequada para a semeadura quando a simulação do balanço hídrico apresentou resultados de ISNA com frequência mínima de 80%, superior ao valor do critério adotado. Tendo em vista um aumento de temperatura do ar de 3 e 6 oC, como sugerido pelo IPCC, o cultivo do feijão-caupi sofrerá uma redução significativa nas áreas atualmente favoráveis ao seu cultivo no Estado da Paraíba.This study evaluates the impacts of climate change, based on the reports of the IPCC, on the agricultural zoning of climatic risk of the rainfed cowpea (Vigna unguiculata L. Walp crop grown in the Paraíba state. The water balance model combined with GIS techniques was used for identifying areas in the state where the cowpea crop will suffer yield restrictions due to climate changes. Model input variables were: rainfall, crop coefficients, potential evapotranspiration and duration of the crop cycle. The limit value of 0.5 was adopted for the water requirement satisfaction index (WRSI. The date acceptable for seeding was that when the water balance simulation presented, for at least 80% minimum frequency, WRSI value greater than

  8. Spectroscopy of weakly-bound complexes in highly excited electronic states: the He-I2(E3Πg) ion-pair state

    International Nuclear Information System (INIS)

    Prosmiti, Rita; Valdés, Álvaro; Kalemost, Apostolos

    2014-01-01

    The study of electronically excited van der Waals (vdW) systems presents a challenge for the theory of intermolecular interactions, and here we show how far ab initio computations can go. We found that the interaction energies for such electronically excited systems can indeed be determined, providing a reliable and accurate description for the E state potential of the HeI 2 , that in combination with the ground X and electronic excited B state of the complex, is useful to model experimental data related with potential minima and also predict higher vibrational vdW states

  9. Application of NIR - CRDS for state selective study of recombination of para and ortho H3+ ions with electrons in low temperature plasma

    Science.gov (United States)

    Varju, J.; Roučka, Š.; Kotrík, T.; Plašil, R.; Glosík, J.

    2010-05-01

    We present a study of H3+ recombination performed at 77 K on the two lowest rotational levels of this ion, which belong to its two different nuclear spin states of the studied ion. A near infrared cavity ring-down spectrometer (~1381 nm, CRDS arrangement) has been used to obtain the time evolution of concentration of both states. From the overall ion density decay during the afterglow we obtained the binary recombination rate coefficient αbin (77 K) = 1.2×10-7 cm3s-1. We have also observed ternary helium assisted recombination of both para and ortho H3+. The process is very slow (at 77 K) and the obtained ternary recombination rate coefficient is in contradiction with the theoretical prediction. It is the first time that the binary and ternary H3+ recombination rate coefficient was measured at a known population of para and ortho H3+ ions in decaying plasma.

  10. Application of NIR - CRDS for state selective study of recombination of para and ortho H3+ ions with electrons in low temperature plasma

    International Nuclear Information System (INIS)

    Varju, J; Roucka, S; KotrIk, T; Plasil, R; Glosik, J

    2010-01-01

    We present a study of H 3 + recombination performed at 77 K on the two lowest rotational levels of this ion, which belong to its two different nuclear spin states of the studied ion. A near infrared cavity ring-down spectrometer (∼1381 nm, CRDS arrangement) has been used to obtain the time evolution of concentration of both states. From the overall ion density decay during the afterglow we obtained the binary recombination rate coefficient α bin (77 K) = 1.2x10 -7 cm 3 s -1 . We have also observed ternary helium assisted recombination of both para and ortho H 3 + . The process is very slow (at 77 K) and the obtained ternary recombination rate coefficient is in contradiction with the theoretical prediction. It is the first time that the binary and ternary H 3 + recombination rate coefficient was measured at a known population of para and ortho H 3 + ions in decaying plasma.

  11. Children and adolescents treated for post-traumatic stress disorder at the Free State Psychiatric Complex

    Directory of Open Access Journals (Sweden)

    F J W Calitz

    2014-04-01

    Full Text Available Background. Children and adolescents can develop post-traumatic stress disorder (PTSD after exposure to a range of traumatic events, including domestic, political or community violence, violent crime, physical and sexual abuse, hijacking, witnessing a violent crime and motor vehicle accidents. This is particularly critical given the substantial challenge that PTSD poses to the healthy physical, cognitive and emotional development of children and adolescents. Methods. The clinical records of 1 229 children (age 2 - 11 years and adolescents (age 12 - 18 years treated at the Child Mental Health Unit of the Free State Psychiatric Complex (FSPC were screened for the diagnosis of PTSD and analysed for the purpose of this study. Results. Forty-nine (4.0% of the children and adolescents treated at the unit were diagnosed with PTSD, of whom most were female (63.3%. Approximately 22% of the participants had comorbid major depressive disorder. The main traumatic event in both groups was witnessing the death of a close relative (32.7%, followed by sexual assault (25%, rape (25% and physical attack (10.2%. Associated stressors identified included problems at school (55.1%, isolation (39%, fear or anxiety (37%, problematic family relationships (29%, emotional (27% and physical (23% abuse, and lack of social support (23%. Most of the participants (59.2% received psychotherapy. Conclusions. Children and adolescents referred to the FSPC are also exposed to traumatic events which lead to the development of PTSD. The Free State is a sprawling province with remote areas where specialist services and facilities are limited. It is therefore recommended that preventive programmes, training opportunities and consultation services are implemented to identify and treat children and adolescents with PTSD. Schools with limited access to psychological services and large classrooms, impeding the diagnosis and treatment of PTSD specifically, face similar challenges

  12. Thermal state and complex geology of a heterogeneous salty crust of Jupiter's satellite, Europa

    Science.gov (United States)

    Prieto-Ballesteros, O.; Kargel, J.S.

    2005-01-01

    The complex geology of Europa is evidenced by many tectonic and cryomagmatic resurfacing structures, some of which are "painted" into a more visible expression by exogenic alteration processes acting on the principal endogenic cryopetrology. The surface materials emplaced and affected by this activity are mainly composed of water ice in some areas, but in other places there are other minerals involved. Non-ice minerals are visually recognized by their low albedo and reddish color either when first emplaced or, more likely, after alteration by Europan weathering processes, especially sublimation and alteration by ionizing radiation. While red chromophoric material could be due to endogenic production of solid sulfur allotropes or other compounds, most likely the red substance is an impurity produced by radiation alteration of hydrated sulfate salts or sulphuric acid of mainly internal origin. If the non-ice red materials or their precursors have a source in the satellite interior, and if they are not merely trace contaminants, then they can play an important role in the evolution of the icy crust, including structural differentiation and the internal dynamics. Here we assume that these substances are major components of Europa's cryo/hydrosphere, as some models have predicted they should be. If this is an accurate assumption, then these substances should not be neglected in physical, chemical, and biological models of Europa, even if major uncertainties remain as to the exact identity, abundance, and distribution of the non-ice materials. The physical chemical properties of the ice-associated materials will contribute to the physical state of the crust today and in the geological past. In order to model the influence of them on the thermal state and the geology, we have determined the thermal properties of the hydrated salts. Our new lab data reveal very low thermal conductivities for hydrated salts compared to water ice. Lower conductivities of salty ice would

  13. Thr202Ala in thyA Is a Marker for the Latin American Mediterranean Lineage of the Mycobacterium tuberculosis Complex Rather than Para-Aminosalicylic Acid Resistance

    KAUST Repository

    Feuerriegel, S.

    2010-08-30

    Single nucleotide polymorphisms (SNPs) involved in the development of resistance represent powerful markers for the rapid detection of first- and second-line resistance in clinical Mycobacterium tuberculosis complex (MTBC) isolates. However, the association between particular mutations and phenotypic resistance is not always clear-cut, and phylogenetic SNPs have been misclassified as resistance markers in the past. In the present study, we investigated the utility of a specific polymorphism in thyA (Thr202Ala) as a marker for resistance to para-aminosalicyclic acid (PAS). Sixty-three PAS-susceptible MTBC strains comprising all major phylogenetic lineages, reference strain H37Rv, and 135 multidrug-resistant (MDR) strains from Germany (comprising 8 PAS-resistant isolates) were investigated for the presence of Thr202Ala. In both strain collections, the Thr202Ala SNP was found exclusively in strains of the Latin American Mediterranean (LAM) lineage irrespective of PAS resistance. Furthermore, PAS MICs (0.5 mg/liter) for selected LAM strains (all containing the SNP) and non-LAM strains (not containing the SNP), as well as the results of growth curve analyses performed in liquid 7H9 medium in the presence of increasing PAS concentrations (0 to 2.0 mg/liter), were identical. In conclusion, our data demonstrate that the Thr202Ala polymorphism in thyA is not a valid marker for PAS resistance but, instead, represents a phylogenetic marker for the LAM lineage of the M. tuberculosis complex. These findings challenge some of the previous understanding of PAS resistance and, as a consequence, warrant further in-depth investigations of the genetic variation in PAS-resistant clinical isolates and spontaneous mutants.

  14. First occurrence of Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) preying on defoliating caterpillars of oil palm in the state of Para, Brazil; Primeira ocorrencia de Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) predando lagartas desfolhadoras do dendezeiro no estado do Para, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Ribeiro, Rafael C.; Lemos, Walkymario P.; Muller, Antonio A. [EMBRAPA Amazonia Oriental, Belem, PA (Brazil). Lab. de Entomologia], e-mail: rafaufra@yahoo.com.br, e-mail: wplemos@cpatu.embrapa.br; Muller, Antonio A. [Embrapa Amazonia Oriental, Belem, PA (Brazil). Lab. de Entomologia; Bernardino, Aline S.; Buecke, Joel [Grupo Agropalma S/A., Tailandia, PA (Brazil)

    2010-01-15

    The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hubner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Para, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. (author)

  15. Parent's Guide to Special Education in Washington State, 1985-86 [and] Guia para Padres: Para Educacion Especial en el Estado de Washington.

    Science.gov (United States)

    Washington Office of the State Superintendent of Public Instruction, Olympia.

    This pamphlet guides parents of children with disabilities through the procedures for acquiring special education services in the state of Washington. Following an overview of special education, the pamphlet presents information on notice and consent procedures, confidentiality of records, individualized education programs (IEP), the placement…

  16. Prevalence of anti-pestivirus antibodies and risk factors in dairy goats from the semiarid region of Paraíba State, Northeastern Brazil

    Directory of Open Access Journals (Sweden)

    Maria Luana Cristiny Rodrigues Silva

    2014-06-01

    Full Text Available t The aim of this survey was to determine the prevalence of anti-pestivirus antibodies in dairy goats from the semiarid region of the Paraíba state, Northeastern Brazil, as well as to identify risk factors associated with the flock-level prevalence. A total of 1,092 dairy goats from 110 flocks randomly selected in the county of Monteiro, Paraíba state, during March 2009 to March 2010, were used. In each selected flock a epidemiological questionnaire was applied to verify the occurrence of possible factors that could be associated with the flock-level prevalence. For the serological diagnosis of Pestivirus infection the serum neutralization test, using the BVDV-1 NADL strain, was carried out. Flock-level prevalence was 6.36% (95% CI = 2.60% – 12.67% and animal-level prevalence was 0.82% (95% CI = 0.38% – 1.56%. Not to perform vermifugation (odds ratio = 10.49; p = 0.035 and to perform navel cut and disinfection (odds ratio = 12.73; p = 0.034 were identified as risk factors. These results indicate viral circulation in dairy goats in the semiarid region of the Paraíba state.

  17. Protein Structural Deformation Induced Lifetime Shortening of Photosynthetic Bacteria Light-Harvesting Complex LH2 Excited State

    OpenAIRE

    Chen, Xing-Hai; Zhang, Lei; Weng, Yu-Xiang; Du, Lu-Chao; Ye, Man-Ping; Yang, Guo-Zhen; Fujii, Ritsuko; Rondonuwu, Ferdy S.; Koyama, Yasushi; Wu, Yi-Shi; Zhang, J. P.

    2005-01-01

    Photosynthetic bacterial light-harvesting antenna complex LH2 was immobilized on the surface of TiO2 nanoparticles in the colloidal solution. The LH2/TiO2 assembly was investigated by the time-resolved spectroscopic methods. The excited-state lifetimes for carotenoid-containing and carotenoidless LH2 have been measured, showing a decrease in the excited-state lifetime of B850 when LH2 was immobilized on TiO2. The possibility that the decrease of the LH2 excited-state lifetime being caused by ...

  18. Decoding Complex Cognitive States Online by Manifold Regularization in Real-Time fMRI

    DEFF Research Database (Denmark)

    Hansen, Toke Jansen; Hansen, Lars Kai; Madsen, Kristoffer Hougaard

    2011-01-01

    Human decision making is complex and influenced by many factors on multiple time scales, reflected in the numerous brain networks and connectivity patterns involved as revealed by fMRI. We address mislabeling issues in paradigms involving complex cognition, by considering a manifold regularizing...

  19. Chromium(0), molybdenum(0), and tungsten(0) isocyanide complexes as luminophores and photosensitizers with long-lived excited states

    Energy Technology Data Exchange (ETDEWEB)

    Bueldt, Laura A. [Institute of Inorganic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076, Tuebingen (Germany); Wenger, Oliver S. [Department of Chemistry, University of Basel, St. Johanns-Ring 19, 4056, Basel (Switzerland)

    2017-05-15

    Arylisocyanide complexes based on earth-abundant Group 6 d{sup 6} metals are interesting alternatives to photoactive complexes made from precious metals such as Ru{sup II}, Re{sup I}, Os{sup II}, or Ir{sup III}. Some of these complexes have long-lived {sup 3}MLCT excited states that exhibit luminescence with good quantum yields as well as nano- to microsecond lifetimes, and they are very strongly reducing. Recent studies have demonstrated that Cr{sup 0}, Mo{sup 0}, and W{sup 0} arylisocyanide complexes have great potential for applications in luminescent devices, photoredox catalysis, and dye-sensitized solar cells. (copyright 2017 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

  20. Line bundle twisted chiral de Rham complex and bound states of D-branes on toric manifolds

    International Nuclear Information System (INIS)

    Parkhomenko, S.E.

    2014-01-01

    In this note we calculate elliptic genus in various examples of twisted chiral de Rham complex on two-dimensional toric compact manifolds and Calabi–Yau hypersurfaces in toric manifolds. At first the elliptic genus is calculated for the line bundle twisted chiral de Rham complex on a compact smooth toric manifold and K3 hypersurface in P 3 . Then we twist chiral de Rham complex by sheaves localized on positive codimension submanifolds in P 2 and calculate in each case the elliptic genus. In the last example the elliptic genus of chiral de Rham complex on P 2 twisted by SL(N) vector bundle with instanton number k is calculated. In all the cases considered we find the infinite tower of open string oscillator contributions and identify directly the open string boundary conditions of the corresponding bound state of D-branes

  1. Implementation of a complex multi-phase equation of state for cerium and its correlation with experiment

    Energy Technology Data Exchange (ETDEWEB)

    Cherne, Frank J [Los Alamos National Laboratory; Jensen, Brian J [Los Alamos National Laboratory; Elkin, Vyacheslav M [VNIITF

    2009-01-01

    The complexity of cerium combined with its interesting material properties makes it a desirable material to examine dynamically. Characteristics such as the softening of the material before the phase change, low pressure solid-solid phase change, predicted low pressure melt boundary, and the solid-solid critical point add complexity to the construction of its equation of state. Currently, we are incorporating a feedback loop between a theoretical understanding of the material and an experimental understanding. Using a model equation of state for cerium we compare calculated wave profiles with experimental wave profiles for a number of front surface impact (cerium impacting a plated window) experiments. Using the calculated release isentrope we predict the temperature of the observed rarefaction shock. These experiments showed that the release state occurs at different magnitudes, thus allowing us to infer where dynamic {gamma} - {alpha} phase boundary is.

  2. Infrared spectra of proton transfer complexes of the cycleanine alkaloid in solid state

    Science.gov (United States)

    Kasende, Okuma E.; de Waal, D.

    2003-01-01

    Proton transfer complexes obtained between the cycleanine alkaloid and hydrogen chloride, hydrogen bromide and nitric acids have been investigated by infrared spectroscopic technique between 4000 and 400 cm -1 in KBr. The vibrational perturbations brought about by proton transfer complex formation, discussed in terms of preferred site of interaction, show that the proton of the inorganic acids is transferred to cycleanine through one of its N sites.

  3. Analysis and systematization of experience of state administration of Russian Federation military-industrial complex

    OpenAIRE

    O. F. Salnikova; H. P. Sytnik

    2014-01-01

    The analysis of the systems of development of the military-industrial complex of the Russian Federation is conducted in the article. Control system of the military-industrial complex of the Russian Federation is schematically represented in the article. Russia is one of the largest exporters of armaments. The most popular types of armaments are airplanes, systems of air defense, helicopters, fighting machines of infantry and small-arms. For today Russia actively masters new on ...

  4. Communication: Broad manifold of excitonic states in light-harvesting complex 1 promotes efficient unidirectional energy transfer in vivo

    Science.gov (United States)

    Sohail, Sara H.; Dahlberg, Peter D.; Allodi, Marco A.; Massey, Sara C.; Ting, Po-Chieh; Martin, Elizabeth C.; Hunter, C. Neil; Engel, Gregory S.

    2017-10-01

    In photosynthetic organisms, the pigment-protein complexes that comprise the light-harvesting antenna exhibit complex electronic structures and ultrafast dynamics due to the coupling among the chromophores. Here, we present absorptive two-dimensional (2D) electronic spectra from living cultures of the purple bacterium, Rhodobacter sphaeroides, acquired using gradient assisted photon echo spectroscopy. Diagonal slices through the 2D lineshape of the LH1 stimulated emission/ground state bleach feature reveal a resolvable higher energy population within the B875 manifold. The waiting time evolution of diagonal, horizontal, and vertical slices through the 2D lineshape shows a sub-100 fs intra-complex relaxation as this higher energy population red shifts. The absorption (855 nm) of this higher lying sub-population of B875 before it has red shifted optimizes spectral overlap between the LH1 B875 band and the B850 band of LH2. Access to an energetically broad distribution of excitonic states within B875 offers a mechanism for efficient energy transfer from LH2 to LH1 during photosynthesis while limiting back transfer. Two-dimensional lineshapes reveal a rapid decay in the ground-state bleach/stimulated emission of B875. This signal, identified as a decrease in the dipole strength of a strong transition in LH1 on the red side of the B875 band, is assigned to the rapid localization of an initially delocalized exciton state, a dephasing process that frustrates back transfer from LH1 to LH2.

  5. Copper(II) Thiosemicarbazone Complexes and Their Proligands upon UVA Irradiation: An EPR and Spectrophotometric Steady-State Study.

    Science.gov (United States)

    Hricovíni, Michal; Mazúr, Milan; Sîrbu, Angela; Palamarciuc, Oleg; Arion, Vladimir B; Brezová, Vlasta

    2018-03-21

    X- and Q-band electron paramagnetic resonance (EPR) spectroscopy was used to characterize polycrystalline Cu(II) complexes that contained sodium 5-sulfonate salicylaldehyde thiosemicarbazones possessing a hydrogen, methyl, ethyl, or phenyl substituent at the terminal nitrogen. The ability of thiosemicarbazone proligands to generate superoxide radical anions and hydroxyl radicals upon their exposure to UVA irradiation in aerated aqueous solutions was evidenced by the EPR spin trapping technique. The UVA irradiation of proligands in neutral or alkaline solutions and dimethylsulfoxide (DMSO) caused a significant decrease in the absorption bands of aldimine and phenolic chromophores. Mixing of proligand solutions with the equimolar amount of copper(II) ions resulted in the formation of 1:1 Cu(II)-to-ligand complex, with the EPR and UV-Vis spectra fully compatible with those obtained for the dissolved Cu(II) thiosemicarbazone complexes. The formation of the complexes fully inhibited the photoinduced generation of reactive oxygen species, and only subtle changes were found in the electronic absorption spectra of the complexes in aqueous and DMSO solutions upon UVA steady-state irradiation. The dark redox activity of copper(II) complexes and proligand/Cu(II) aqueous solutions towards hydrogen peroxide which resulted in the generation of hydroxyl radicals, was confirmed by spin trapping experiments.

  6. Novas ocorrências de hepáticas (Marchantiophyta para o estado da Bahia, Brasil New records of liverworts (Marchantiophyta from Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    Emilia de Brito Valente

    2006-03-01

    Full Text Available Na Serra da Jibóia, foram registradas 13 espécies de novas ocorrências, sendo oito para a região Nordeste: Bazzania aurescens Spruce, Calypogeia peruviana Nees & Mont., Cephalozia crassifolia (Lindenb. & Gottsche Fulford, Lepidozia cupressina (Sw. Lindenb., Pallavicinia lyellii (Hook. S.F. Gray, Plagiochilla diversifolia Lindenb. & Gottsche, Radula kegelli Gottsche ex Steph. e Riccardia fucoidea (Sw. Schiffin., e cinco espécies referidas pela primeira vez para o Estado: Metzgeria albinea Spruce, Plagiochila gymnocalycina (Lehm. & Lindenb. Mont., P. simplex (Sw. Lindenb., Riccardia amazonica (Spruce S.W. Arnell e Symphyogyna aspera Steph. Para cada espécie são fornecidos comentários taxonômicos, ecológicos e distribuição geográfica mundial e no Brasil, além de indicação de literatura contendo descrição e ilustração. Foram realizadas ilustrações para algumas espécies.In Serra da Jibóia were recorded 13 species of new ocurrence wich are eight species from region Northeastern: Bazzania aurescens Spruce, Calypogeia peruviana Nees & Mont., Cephalozia crassifolia (Lindenb. & Gottsche Fulford, Lepidozia cupressina (Sw. Lindenb., Pallavicinia lyellii (Hook. S.F. Gray, Plagiochilla diversifolia Lindenb. & Gottsche, Radula kegelli Gottsche ex Steph. and Riccardia fucoidea (Sw. Schiffin., and five are recorded for the first time from Bahia, State: Metzgeria albinea Spruce, Plagiochila gymnocalycina (Lehm. & Lindenb. Mont., P. simplex (Sw. Lindenb., Riccardia amazonica (Spruce S.W. Arnell and Symphyogyna aspera Steph. from Bahia, State. For each specie are provided taxonomics and ecological comments, geographical general and in Brazil distribution, and indication of literature with description and ilustration. Some species were ilustrated.

  7. Para-quinodimethane-bridged perylene dimers and pericondensed quaterrylenes: The effect of the fusion mode on the ground states and physical properties

    KAUST Repository

    Das, Soumyajit

    2014-07-23

    Polycyclic hydrocarbon compounds with a singlet biradical ground state show unique physical properties and promising material applications; therefore, it is important to understand the fundamental structure/biradical character/physical properties relationships. In this study, para-quinodimethane (p-QDM)-bridged quinoidal perylene dimers 4 and 5 with different fusion modes and their corresponding aromatic counterparts, the pericondensed quaterrylenes 6 and 7, were synthesized. Their ground-state electronic structures and physical properties were studied by using various experiments assisted with DFT calculations. The proaromatic p-QDM-bridged perylene monoimide dimer 4 has a singlet biradical ground state with a small singlet/triplet energy gap (-2.97 kcalmol-1), whereas the antiaromatic s-indacene-bridged N-annulated perylene dimer 5 exists as a closed-shell quinoid with an obvious intramolecular charge-transfer character. Both of these dimers showed shorter singlet excited-state lifetimes, larger two-photon-absorption cross sections, and smaller energy gaps than the corresponding aromatic quaterrylene derivatives 6 and 7, respectively. Our studies revealed how the fusion mode and aromaticity affect the ground state and, consequently, the photophysical properties and electronic properties of a series of extended polycyclic hydrocarbon compounds. A matter of fusion mode! Fusion of a para-quinodimethane (p-QDM) subunit at the peri and β positions of perylene dimers leads to systems with different ground states, that is, open and closed shell (see picture). These systems showed large two-photon absorption cross sections and ultrafast excited-state dynamics relative to their corresponding pericondensed aromatic quaterrylene counterparts. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  8. Diagnóstico e hierarquização de problemas de drenagem urbana da zona costeira sul do estado da Paraíba Diagnosis and hierarchization of urban drainage problems in the south coast zone of Paraíba state

    Directory of Open Access Journals (Sweden)

    Tarciso Cabral da Silva

    2008-06-01

    Full Text Available A zona costeira do litoral sul do estado da Paraíba é configurada por paisagens diversificadas e caracterizada pela presença de elementos naturais e artificiais que a conferem grande fragilidade e notável beleza cênica. Neste cenário se integram partes de malhas urbanas de municípios litorâneos, áreas de proteção ambiental, falésias, estuários, entre outros. As intervenções antrópicas que desconsideram a complexidade ambiental destas áreas vêm provocando impactos negativos na paisagem, associados aos problemas de drenagem de águas pluviais. Neste trabalho apresenta-se um diagnóstico, que permitiu a hierarquização dos problemas relativos à drenagem pluvial por orla de cada município inserido nesta zona. Os resultados permitem a tomada de decisão para a escolha de ações visando a atenuação ou eliminação dos problemas identificados.The coastal zone of the south coastline of Paraíba State is shaped by diversified landscapes and characterized by the presence of natural and artificial elements that provide this space with great fragility and notable scenic beauty. In this scenery, integrated urban zones, areas of environmental protection, sea cliffs, estuaries of rivers, among others, coexist. The anthropic interventions that do not take into account the complexity of environmental elements cause negative impacts on the landscape of the urbanized maritime edges, as well as associated problems of urban drainage. In this work, a diagnosis searching for a hierarchization of the problems related to the pluvial drainage in these areas is presented. The results allow to the decision taker the choice of better solutions aiming at reducing or eliminating the identified problems.

  9. Solid-state NMR on complex biomolecules: novel methods and applications

    NARCIS (Netherlands)

    Nand, D.

    2011-01-01

    Solid-state NMR (ssNMR) represents a versatile technique in providing atomic-resolution information without the need for crystals or fast molecular motion required for X-ray crystallography and solution-state NMR, respectively. Recent past has witnessed the ability of this technique in providing

  10. Solid State NMR Characterization of Complex Metal Hydrides systems for Hydrogen Storage Applications

    Directory of Open Access Journals (Sweden)

    Son-Jong Hwang

    2011-12-01

    Full Text Available Solid state NMR is widely applied in studies of solid state chemistries for hydrogen storage reactions. Use of 11B MAS NMR in studies of metal borohydrides (BH4 is mainly focused, revisiting the issue of dodecaborane formation and observation of 11B{1H} Nuclear Overhauser Effect.

  11. Uncertainty Quantification for Complex RF-structures Using the State-space Concatenation Approach

    CERN Document Server

    Heller, Johann; Schmidt, Christian; Van Rienen, Ursula

    2015-01-01

    as well as to employ robust optimizations, a so-called uncertainty quantification (UQ) is applied. For large and complex structures such computations are heavily demanding and cannot be carried out using standard brute-force approaches. In this paper, we propose a combination of established techniques to perform UQ for long and complex structures, where the uncertainty is located only in parts of the structure. As exemplary structure, we investigate the third-harmonic cavity, which is being used at the FLASH accelerator at DESY, assuming an uncertain...

  12. IMPROVING THE EFFICIENCY OF THE STATE FINANCIAL CONTROL IN THE SPHERE OF HIGH-TECH MILITARY-INDUSTRIAL COMPLEX

    Directory of Open Access Journals (Sweden)

    Anzhela Zakhitovna Namitulina

    2016-01-01

    Full Text Available The presented research topic is particularly relevant due to the high value and the need to strengthen fi nancial control for the development of the military-industrial complex (MIC, to ensure the country's economic security, preservation and development of scientifi c and technical potential. The urgency of acquiring those aspects of economic relations which are connected with the supply the export of high-tech military products in a limited budget funding State should have levers of infl uence on the functioning of the military-industrial complex, the ability to pursue an independent foreign military-technical policy. In the new economic conditions, it became necessary to address the problems of fi nancial security of the defense-industrial complex, in order to strengthen the independence and security of Russia, as well as the need to give priority nature of the measures of state control in the economy related to the implementation of the defense order, ie, in the sphere of military-industrial complex. At the present stage of economic development of Russia, the rate of growth of the national economy largely depends on what the situation is in the military-industrial complex (MIC. This is due to the fact that the defense industry is the most high-quality, high-tech economy. It concentrated the largest part of the Russian potential, the best staff of scientists and experts. Products and DIC technology widely used in other industries. The modern military-industrial complex produces a signifi cant part of civil production. DIC integration with civilian industries – it is also a technological basis for solving the basic problems currently facing the Russian economy, and, above all, the basis of the formation of a new technological basis for the development of high technology and competitive products, which determines the pace of scientifi c and technological progress and the growth of the national economy. Objectives. The aim of the paper is the

  13. Study on photophysical properties of Eu(III) complexes with aromatic β-diketones – Role of charge transfer states in the energy migration

    Energy Technology Data Exchange (ETDEWEB)

    Räsänen, Markus, E-mail: mpvras@utu.fi [Department of Chemistry, University of Turku, FIN-20014 Turku (Finland); Takalo, Harri [DHR Finland Oy, Innotrac Diagnostics, Biolinja 12, FIN-20750 Turku (Finland); Rosenberg, Jaana; Mäkelä, Joonas [Department of Biochemistry and Food Chemistry, University of Turku, FIN-20014 Turku (Finland); Haapakka, Keijo; Kankare, Jouko [Department of Chemistry, University of Turku, FIN-20014 Turku (Finland)

    2014-02-15

    We synthesized a set of aromatic β-diketones and measured the photophysical properties of their europium(III) complexes. According to these photophysical properties, the europium complexes can be divided into two groups: the complexes with or without the freely rotating amino-group (FRAG). On the basis of the experimental results, it can be concluded that in the FRAG complexes, the ligand-centered excitation energy is most probably transferred from a ligand to a coordinated europium via the intraligand charge transfer (ILCT) state. The temperature dependency of the lifetimes of the emissive {sup 5}D{sub 0} state revealed that in the FRAG complexes, the energy of the emissive {sup 5}D{sub 0} state is back-transferred to the ligand-to-metal charge transfer (LMCT) state and in the non-FRAG complexes, to the triplet state of the ligand. The most efficient complex synthesized was the europium complex of carbazole derivative L{sup 6} with the quantum yield of 47% and molar absorption coefficient of 70,400 M{sup −1}cm{sup −1}. -- Highlights: • We synthesized a set of substituted aromatic β-diketones and their Eu(III) complexes. • We measured the photophysical properties of these Eu(III) complexes. • Carbazole derivative of β-diketone forms the brightest Eu(III) complex. • The Jablonski diagrams proposed for the luminescence of these complexes.

  14. Electronic structure and charge transfer excited states of endohedral fullerene containing electron donoracceptor complexes utilized in organic photovoltaics

    Science.gov (United States)

    Amerikheirabadi, Fatemeh

    Organic Donor-Acceptor complexes form the main component of the organic photovoltaic devices (OPVs). The open circuit voltage of OPVs is directly related to the charge transfer excited state energies of these complexes. Currently a large number of different molecular complexes are being tested for their efficiency in photovoltaic devices. In this work, density functional theory as implemented in the NRLMOL code is used to investigate the electronic structure and related properties of these donor-acceptor complexes. The charge transfer excitation energies are calculated using the perturbative delta self-consistent field method recently developed in our group as the standard time dependent density functional approaches fail to accurately provide them. The model photovoltaics systems analyzed are as follows: Sc3N C 80--ZnTPP, Y3 N C80-- ZnTPP and Sc3 N C80-- ZnPc. In addition, a thorough analysis of the isolated donor and acceptor molecules is also provided. The studied acceptors are chosen from a class of fullerenes named trimetallic nitride endohedral fullerenes. These molecules have shown to possess advantages as acceptors such as long lifetimes of the charge-separated states.

  15. Supramolecular Control of Oligothienylenevinylene-Fullerene Interactions: Evidence for a Ground-State EDA Complex

    NARCIS (Netherlands)

    McClenaghan, N.D.; Grote, Z.; Darriet, K.; Zimine, M.Y.; Williams, R.M.; De Cola, L.; Bassani, D.M.

    2005-01-01

    Complementary hydrogen-bonding interactions between a barbituric acid-substituted fullerene derivative (1) and corresponding receptor (2) bearing thienylenevinylene units are used to assemble a 1:1 supramolecular complex ( K ) 5500 M-1). Due to the close proximity of the redox-active moieties within

  16. Forms of iron in soils on basement complex rocks of Kaduna state in ...

    African Journals Online (AJOL)

    The forms of iron extracted by different methods were studied in soils developed on four basement complex rocks within Northern Guinea Savanna of Nigeria namely: migmatite gneisses, older granite, quartzites and mica schists. The study shows that forms of iron generally decreased in the order of total elemental iron ...

  17. Chimera states in complex networks: interplay of fractal topology and delay

    Science.gov (United States)

    Sawicki, Jakub; Omelchenko, Iryna; Zakharova, Anna; Schöll, Eckehard

    2017-06-01

    Chimera states are an example of intriguing partial synchronization patterns emerging in networks of identical oscillators. They consist of spatially coexisting domains of coherent (synchronized) and incoherent (desynchronized) dynamics. We analyze chimera states in networks of Van der Pol oscillators with hierarchical connectivities, and elaborate the role of time delay introduced in the coupling term. In the parameter plane of coupling strength and delay time we find tongue-like regions of existence of chimera states alternating with regions of existence of coherent travelling waves. We demonstrate that by varying the time delay one can deliberately stabilize desired spatio-temporal patterns in the system.

  18. Protein structural deformation induced lifetime shortening of photosynthetic bacteria light-harvesting complex LH2 excited state.

    Science.gov (United States)

    Chen, Xing-Hai; Zhang, Lei; Weng, Yu-Xiang; Du, Lu-Chao; Ye, Man-Ping; Yang, Guo-Zhen; Fujii, Ritsuko; Rondonuwu, Ferdy S; Koyama, Yasushi; Wu, Yi-Shi; Zhang, J P

    2005-06-01

    Photosynthetic bacterial light-harvesting antenna complex LH2 was immobilized on the surface of TiO(2) nanoparticles in the colloidal solution. The LH2/TiO(2) assembly was investigated by the time-resolved spectroscopic methods. The excited-state lifetimes for carotenoid-containing and carotenoidless LH2 have been measured, showing a decrease in the excited-state lifetime of B850 when LH2 was immobilized on TiO(2). The possibility that the decrease of the LH2 excited-state lifetime being caused by an interfacial electron transfer reaction between B850 and the TiO(2) nanoparticle was precluded experimentally. We proposed that the observed change in the photophysical properties of LH2 when assembled onto TiO(2) nanoparticles is arising from the interfacial-interaction-induced structural deformation of the LH2 complex deviating from an ellipse of less eccentric to a more eccentric ellipse, and the observed phenomenon can be accounted by an elliptical exciton model. Experiment by using photoinactive SiO(2) nanoparticle in place of TiO(2) and core complex LH1 instead of LH2 provide further evidence to the proposed mechanism.

  19. State-Civil Society Partnership: issues for debate and new researches [Parceria entre o Estado e a Sociedade Civil: pontos para o debate e novas pesquisas

    Directory of Open Access Journals (Sweden)

    Mário Vasconcellos

    2011-12-01

    Full Text Available In this paper we look at the literature related to partnership between state and civil society, especially partnership between public and non-for-profi t organisations. We discuss the differing perspectives of partnership and attempt to identify some of the main theoretical concerns about partnership between state and civil society in the governance context. In this paper, we argue that the historical background of partnership has not been included among factors used in explaining the resort to partnership in governance. In spite of existing analyses showing that partnership brings social benefi ts in their own right, we try to show that there is no evidence that this ‘social technology’ contributes effectively to bringing power to powerless people and social groups. Most of the literature shows that partnership tries to make relationship between local people and local governance stronger and improve the possibilities for powerless people and social groups to participate in local governance. However, we do not fi nd clear evidence in the literature that partnership allows for a shift in political power. Finally, we show that it is unclear whether the interaction between ordinary people and the state through a participatory process has successfully helped to build social cohesiveness for different social groups. The main contribution of this paper is to expand the understanding of the factors that infl uence the process of partnership between state and civil society (positively and negatively for local development. ---- Parceria entre o Estado e a Sociedade Civil: pontos para o debate e novas pesquisas ---- Resumo ---- Neste artigo analisamos a literatura de parceria entre o estado e a sociedade civil, em particular sobre a parceria entre as organizações públicas e as organizações sem fins lucrativos. Discutimos as diferentes perspectivas do conceito de parceria e objetivamos destacar algumas das principais preocupações teóricas sobre

  20. Constructing Markov State Models to elucidate the functional conformational changes of complex biomolecules

    KAUST Repository

    Wang, Wei; Cao, Siqin; Zhu, Lizhe; Huang, Xuhui

    2017-01-01

    bioengineering applications and rational drug design. Constructing Markov State Models (MSMs) based on large-scale molecular dynamics simulations has emerged as a powerful approach to model functional conformational changes of the biomolecular system

  1. Coupled dynamics of node and link states in complex networks: a model for language competition

    International Nuclear Information System (INIS)

    Carro, Adrián; Toral, Raúl; Miguel, Maxi San

    2016-01-01

    Inspired by language competition processes, we present a model of coupled evolution of node and link states. In particular, we focus on the interplay between the use of a language and the preference or attitude of the speakers towards it, which we model, respectively, as a property of the interactions between speakers (a link state) and as a property of the speakers themselves (a node state). Furthermore, we restrict our attention to the case of two socially equivalent languages and to socially inspired network topologies based on a mechanism of triadic closure. As opposed to most of the previous literature, where language extinction is an inevitable outcome of the dynamics, we find a broad range of possible asymptotic configurations, which we classify as: frozen extinction states, frozen coexistence states, and dynamically trapped coexistence states. Moreover, metastable coexistence states with very long survival times and displaying a non-trivial dynamics are found to be abundant. Interestingly, a system size scaling analysis shows, on the one hand, that the probability of language extinction vanishes exponentially for increasing system sizes and, on the other hand, that the time scale of survival of the non-trivial dynamical metastable states increases linearly with the size of the system. Thus, non-trivial dynamical coexistence is the only possible outcome for large enough systems. Finally, we show how this coexistence is characterized by one of the languages becoming clearly predominant while the other one becomes increasingly confined to ‘ghetto-like’ structures: small groups of bilingual speakers arranged in triangles, with a strong preference for the minority language, and using it for their intra-group interactions while they switch to the predominant language for communications with the rest of the population. (paper)

  2. Registros nuevos para la avifauna del estado de Hidalgo, México New records for the avifauna of the state of Hidalgo, Mexico

    Directory of Open Access Journals (Sweden)

    Raúl Valencia-Herverth

    2010-04-01

    Full Text Available Se presentan 6 registros nuevos de aves para el estado de Hidalgo que se obtuvieron durante el trabajo de campo realizado de agosto 2006 a octubre 2007 y de registros no publicados de especímenes de la Colección Ornitológica del Instituto Tecnológico de Huejutla.Six new state records of birds for Hidalgo based on field work carried out from August 2006 to October 2007 are presented, and from unpublished records of specimens in the Ornithological Collection of the Instituto Tecnológico de Huejutla.

  3. First occurrence of Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) preying on defoliating caterpillars of oil palm in the state of Para, Brazil

    International Nuclear Information System (INIS)

    Ribeiro, Rafael C.; Lemos, Walkymario P.; Muller, Antonio A.

    2010-01-01

    The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hubner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Para, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. (author)

  4. Desenvolvimento vegetativo de abacaxizeiros 'Pérola' e 'Smooth Cayenne' no Estado da Paraíba Vegetative development of Pérola and Smooth Cayenne pineapple cultivars in the state of Paraíba

    Directory of Open Access Journals (Sweden)

    Alessandra Alves Rodrigues

    2010-03-01

    Full Text Available Este trabalho teve por objetivo avaliar o desenvolvimento vegetativo de abacaxizeiros 'Pérola' e 'Smooth Cayenne' nas condições edafoclimáticas de Santa Rita, Estado da Paraíba. Foram realizados dois experimentos, um para cada cultivar, em Espodossolo Ferrocárbico de textura arenosa, entre junho de 2003 e setembro de 2004. O delineamento experimental foi o de blocos casualizados, com cinco tratamentos (avaliações aos 4; 6; 8; 10 e 12 meses após o plantio e cinco repetições. Foram avaliadas as variáveis de altura da planta, produção de matéria fresca e seca de raízes, caule e folhas e de matéria fresca da folha 'D' na época de indução floral. Os resultados mostraram que as plantas da cv. Pérola apresentaram maiores valores de altura (133 e 100 cm, matéria fresca (263 e 255 g e seca de raiz (80 e 60 g, matéria fresca (310 e 200 g e seca de caule (86 e 20 g em relação à cv. Smooth Cayenne. O acúmulo de matéria fresca e seca das folhas intensificou-se a partir dos oito meses após o plantio, sendo maior para a cv. Pérola, e obedeceu à seguinte sequência: D>C>B>A. As plantas das duas cultivares apresentaram valores de matéria fresca da folha 'D' na época de indução floral superiores a 80 g (118 g para a 'Pérola' e 81 g para a 'Smooth Cayenne', demonstrando a possibilidade de antecipação desta prática.This study was carried out to evaluate the vegetative development of both pineapple plants 'Pérola' and 'Smooth Cayenne' under the edaphoclimatic conditions in Santa Rita county, in the state of Paraíba. Two experiments were conducted, being one for each cultivar, during the period from June 2003 to September 2004 and the sandy-textured 'Espodossolo Ferrocárbico' was used. The randomized block experimental design was used, with five treatments (evaluations at 4, 6, 8, 10 and 12 months after planting and five replicates. The following variables were evaluated: plant height, both fresh and dry matter yield of the

  5. Chemical states and electronic properties of the interface between aluminium and a photoluminescent conjugated copolymer containing europium complex

    International Nuclear Information System (INIS)

    Cai, Q.J.; Ling, Q.D.; Li, S.; Zhu, F.R.; Huang, Wei; Kang, E.T.; Neoh, K.G.

    2004-01-01

    The chemical states and electronic properties of the interface between thermally evaporated aluminium and a photoluminescent conjugated copolymer containing 9,9'-dihexylfluorene and europium complex-chelated benzoate units in the main chain (PF6-Eu(dbm) 2 phen) were studied in situ by X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS). The changes in C 1s, Eu 3d, N 1s, and Al 2p core-level lineshapes with progressive deposition of aluminium atoms were carefully monitored. Aluminium was found to interact with the conjugated backbone of the copolymer to form the Al carbide, Al-O-C complex, and Al(III)-N chelate at the interface. In addition, the europium ions were reduced to the metallic state by the deposited aluminium atoms, which were oxidized and chelated by the 1,10-phenanthroline ligands (phen). The changes in chemical states at the interface suggest that the intramolecular energy transfer process in this copolymer had been affected. Moreover, aluminium also interacted with the bulk-adsorbed oxygen, which migrates to the surface in response to the deposition of aluminium atoms, to form a layer of metal oxides. On the other hand, the evolution of the UPS spectra suggests that the π-states of the conjugated system were affected and an unfavorable dipole layer was induced by the deposited aluminium atoms

  6. Complex Metal Hydrides for hydrogen storage and solid-state ion conductors

    DEFF Research Database (Denmark)

    Payandeh GharibDoust, SeyedHosein

    and electricity in batteries. However, both hydrogen and electricity must be stored in a very dense way to be useful, e.g. for mobile applications. Complex metal hydrides have high hydrogen density and have been studied during the past twenty years in hydrogen storage systems. Moreover, they have shown high ionic...... conductivities which promote their application as solid electrolytes in batteries. This dissertation presents the synthesis and characterization of a variety of complex metal hydrides and explores their hydrogen storage properties and ionic conductivity. Five halide free rare earth borohydrides RE(BH4)3, (RE...... = La, Ce, Pr, Nd, Er) have been synthesized, which pave the way for studying the polymorphic transition in these compounds, obtaining new bimetallic borohydrides and designing new reactive hydride composites with improved hydrogen storage capacities. Two novel polymorphs of Pr(BH4)3 are identified...

  7. Rahman Prize Lecture: Lattice Boltzmann simulation of complex states of flowing matter

    Science.gov (United States)

    Succi, Sauro

    Over the last three decades, the Lattice Boltzmann (LB) method has gained a prominent role in the numerical simulation of complex flows across an impressively broad range of scales, from fully-developed turbulence in real-life geometries, to multiphase flows in micro-fluidic devices, all the way down to biopolymer translocation in nanopores and lately, even quark-gluon plasmas. After a brief introduction to the main ideas behind the LB method and its historical developments, we shall present a few selected applications to complex flow problems at various scales of motion. Finally, we shall discuss prospects for extreme-scale LB simulations of outstanding problems in the physics of fluids and its interfaces with material sciences and biology, such as the modelling of fluid turbulence, the optimal design of nanoporous gold catalysts and protein folding/aggregation in crowded environments.

  8. 75 FR 3434 - Fisheries of the Northeastern United States; Northeast Skate Complex Fishery; Amendment 3

    Science.gov (United States)

    2010-01-21

    ...NMFS proposes regulations to implement measures in Amendment 3 to the Northeast Skate Complex Fishery Management Plan (Skate FMP). Amendment 3 was developed by the New England Fishery Management Council (Council) to rebuild overfished skate stocks and implement annual catch limits (ACLs) and accountability measures (AMs) consistent with the requirements of the reauthorized Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens Act). Amendment 3 would implement a rebuilding plan for smooth skate and establish an ACL and annual catch target (ACT) for the skate complex, total allowable landings (TAL) for the skate wing and bait fisheries, seasonal quotas for the bait fishery, reduced possession limits, in-season possession limit triggers, and other measures to improve management of the skate fisheries. This proposed rule also includes skate fishery specifications for fishing years (FY) 2010 and 2011.

  9. Synthesis and Isotope Effects on the Excited State Properties of NN Bound Complexes

    NARCIS (Netherlands)

    Soman, Suraj; Younis, Hamid M.; Browne, Wesley R.; Vos, Johannes G.; Pryce, Mary T.

    2017-01-01

    A versatile approach to the preparation of [Ir(LL)(2)Cl-2](PF6) type complexes is reported, in which LL is an (NN)-N- bound polypyridyl ligand [X(2)bpy, X(2)phen, where X = H-, CH3-, (CH3)(3)C-, or phenyl-, and bpy = 2,2-bipyridyl, phen = 1,10-phenanthroline] as well as their deuterated analogues.

  10. Anonymous As a Cyber Tribe: A New Model for Complex, Non-State Cyber Actors

    Science.gov (United States)

    2015-05-01

    personas. Only then can cyber strategists exercise the required amount of cultural relativism needed to influence complex, and sometimes disturbing...that runs counter to their professional ethic ? When cyber tribes employ atrocity to create cultural barriers, how will planners remain focused on...as a cyber actor’s motivation? Meeting these challenges requires new levels of cultural relativism —the understanding of a “culture or a cultural

  11. Desenvolvimento e análise de uma rede neural artificial para estimativa da erosividade da chuva para o Estado de São Paulo Estimates of rainfall erosivity in São Paulo state by an artificial neural network

    Directory of Open Access Journals (Sweden)

    Michel Castro Moreira

    2006-12-01

    Full Text Available O conhecimento do valor da erosividade da chuva (R de determinada localidade é fundamental para a estimativa das perdas de solo feitas a partir da Equação Universal de Perdas de Solo, sendo, portanto, de grande importância no planejamento conservacionista. A fim de obter estimativas do valor de R para localidades onde este é desconhecido, desenvolveu-se uma rede neural artificial (RNA e analisou-se a acurácia desta com o método de interpolação "Inverso de uma Potência da Distância" (ID. Comparando a RNA desenvolvida com o método de interpolação ID, verificou-se que a primeira apresentou menor erro relativo médio na estimativa de R e melhor índice de confiança, classificado como "Ótimo", podendo, portanto, ser utilizada no planejamento de uso, manejo e conservação do solo no Estado de São Paulo.Knowledge on rainfall erosivity (R of particular sites is fundamental for soil loss estimation by the Universal Soil Loss Equation (USLE and therefore highly important in conservation planning. In order to obtain the R value estimates for places where it is unknown, an artificial neural network (ANN was developed for the state of São Paulo, and its accuracy compared with the Inverse Distance Weighted (IDW interpolation method. The developed ANN presented a smaller mean relative error in the R estimation and a confidence index classified as "excellent", better than the IDW. ANN can therefore be used to estimate R values for soil use planning, management and conservation in São Paulo state.

  12. Brownian dynamics of a protein-polymer chain complex in a solid-state nanopore

    Science.gov (United States)

    Wells, Craig C.; Melnikov, Dmitriy V.; Gracheva, Maria E.

    2017-08-01

    We study the movement of a polymer attached to a large protein inside a nanopore in a thin silicon dioxide membrane submerged in an electrolyte solution. We use Brownian dynamics to describe the motion of a negatively charged polymer chain of varying lengths attached to a neutral protein modeled as a spherical bead with a radius larger than that of the nanopore, allowing the chain to thread the nanopore but preventing it from translocating. The motion of the protein-polymer complex within the pore is also compared to that of a freely translocating polymer. Our results show that the free polymer's standard deviations in the direction normal to the pore axis is greater than that of the protein-polymer complex. We find that restrictions imposed by the protein, bias, and neighboring chain segments aid in controlling the position of the chain in the pore. Understanding the behavior of the protein-polymer chain complex may lead to methods that improve molecule identification by increasing the resolution of ionic current measurements.

  13. States of an on-axis two-hydrogenic-impurity complex in concentric double quantum rings

    International Nuclear Information System (INIS)

    R-Fulla, M.; Marín, J.H.; Suaza, Y.A.; Duque, C.A.; Mora-Ramos, M.E.

    2014-01-01

    The energy structure of an on-axis two-donor system (D 2 0 ) confined in GaAs concentric double quantum rings under the presence of magnetic field and hydrostatic pressure was analyzed. Based on structural data for the double quantum ring morphology, a rigorous adiabatic procedure was implemented to separate the electrons' rapid in-plane motions from the slow rotational ones. A one-dimensional equation with an effective angular-dependent potential, which describes the two-electron rotations around the common symmetry axis of quantum rings was obtained. It was shown that D 2 0 complex characteristic features are strongly dependent on the quantum ring geometrical parameters. Besides, by changing the hydrostatic pressure and magnetic field strengths, it is possible to tune the D 2 0 energy structure. Our results are comparable to those previously reported for a single and negative ionized donor in a spherical quantum dot after a selective setting of the geometrical parameters of the structure. - Highlights: • We report the eigenenergies of a D 2 0 complex in concentric double quantum rings. • Our model is versatile enough to analyze the dissociation process D 2 0 →D 0 +D + +e − . • We compare the D 0 eigenenergies in horn toroidal and spherical shaped quantum dots. • We show the effects of hydrostatic pressure and magnetic field on the D 2 0 spectrum. • The use of hydrostatic pressure provides higher thermal stability to the D 2 0 complex

  14. More than meets the eye: the role of self-identity in decoding complex emotional states.

    Science.gov (United States)

    Stevenson, Michael T; Soto, José A; Adams, Reginald B

    2012-10-01

    Folk wisdom asserts that "the eyes are the window to the soul," and empirical science corroborates a prominent role for the eyes in the communication of emotion. Herein we examine variation in the ability to "read" the eyes of others as a function of social group membership, employing a widely used emotional state decoding task: "Reading the Mind in Eyes." This task has documented impaired emotional state decoding across racial groups, with cross-race performance on par with that previously reported as a function of autism spectrum disorders. The present study extended this work by examining the moderating role of social identity in such impairments. For college students more highly identified with their university, cross-race performance differences were not found for judgments of "same-school" eyes but remained for "rival-school" eyes. These findings suggest that impaired emotional state decoding across groups may thus be more amenable to remediation than previously realized.

  15. Ultrafast excited state processes in Roseobacter denitrificans antennae: comparison of isolated complexes and native membranes

    NARCIS (Netherlands)

    Ferretti, M.; Duquesne, K.; Sturgis, J.N.; van Grondelle, R.

    2014-01-01

    Roseobacter (Rsb.) denitrificans is a marine aerobic anoxygenic photosynthetic purple bacterium with an unusually high-800 nm absorption band. Ultrafast excited state processes have been intensively studied in the past in order to understand why the energy transfer efficiency between photosynthetic

  16. Complexity Analysis of Resting-State MEG Activity in Early-Stage Parkinson's Disease Patients

    NARCIS (Netherlands)

    Gómez, C.; Olde Dubbelink, K.T.E.; Stam, C.J.; Abasolo, D.; Berendse, H.W.; Hornero, R.

    2011-01-01

    The aim of the present study was to analyze resting-state brain activity in patients with Parkinson's disease (PD), a degenerative disorder of the nervous system. Magnetoencephalography (MEG) signals were recorded with a 151-channel whole-head radial gradiometer MEG system in 18 early-stage

  17. Minors' rights to consent to treatment: navigating the complexity of State laws.

    Science.gov (United States)

    Vukadinovich, David M

    2004-01-01

    State laws recognize that a competent adult patient has the right to consent to or refuse medical treatment. While the law is clear with regard to the right of competent adults, state statutes are more complicated when the patient is a minor. While the law should, and does, attempt to balance the rights and obligations of parents and guardians against the access and privacy rights of minors, complicated state statutory schemes often fail to simultaneously address those contrasting goals in a consistent and uniform manner. The result is a confusing set of seemingly arbitrary and sometimes conflicting provisions that require the detailed attention of healthcare providers to ensure legal compliance. With the aim of helping healthcare practitioners meet their legal obligations, this Article examines state laws governing minor's consent rights byfocusing on the instances in which a minor's parent, guardian, or other authorized adult is permitted to consent to treatment on behalf of a minor and the instances in which a minor is authorized to act independent of adult intervention.

  18. The total quasi-steady-state approximation for complex enzyme reactions

    DEFF Research Database (Denmark)

    Pedersen, Morten Gram; Bersani, A. M.; Bersani, E.

    2008-01-01

    ) approximation (or standard quasi-steady-state approximation (sQSSA)), which is valid when the enzyme concentration is sufficiently small. This condition is usually fulfilled for in vitro experiments, but often breaks down in vivo. The total QSSA (tQSSA), which is valid for a broader range of parameters covering...

  19. States of an on-axis two-hydrogenic-impurity complex in concentric double quantum rings

    Energy Technology Data Exchange (ETDEWEB)

    R-Fulla, M., E-mail: marlonfulla@yahoo.com [Escuela de Física, Universidad Nacional de Colombia, A.A. 3840, Medellín (Colombia); Institución Universitaria Pascual Bravo, A.A. 6564, Medellín (Colombia); Marín, J.H.; Suaza, Y.A. [Escuela de Física, Universidad Nacional de Colombia, A.A. 3840, Medellín (Colombia); Duque, C.A. [Grupo de Materia Condensada-U de A, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, calle 70 No. 52-21, Medellín (Colombia); Mora-Ramos, M.E. [Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, CP 62209, Cuernavaca, Morelos (Mexico)

    2014-06-13

    The energy structure of an on-axis two-donor system (D{sub 2}{sup 0}) confined in GaAs concentric double quantum rings under the presence of magnetic field and hydrostatic pressure was analyzed. Based on structural data for the double quantum ring morphology, a rigorous adiabatic procedure was implemented to separate the electrons' rapid in-plane motions from the slow rotational ones. A one-dimensional equation with an effective angular-dependent potential, which describes the two-electron rotations around the common symmetry axis of quantum rings was obtained. It was shown that D{sub 2}{sup 0} complex characteristic features are strongly dependent on the quantum ring geometrical parameters. Besides, by changing the hydrostatic pressure and magnetic field strengths, it is possible to tune the D{sub 2}{sup 0} energy structure. Our results are comparable to those previously reported for a single and negative ionized donor in a spherical quantum dot after a selective setting of the geometrical parameters of the structure. - Highlights: • We report the eigenenergies of a D{sub 2}{sup 0} complex in concentric double quantum rings. • Our model is versatile enough to analyze the dissociation process D{sub 2}{sup 0}→D{sup 0}+D{sup +}+e{sup −}. • We compare the D{sup 0} eigenenergies in horn toroidal and spherical shaped quantum dots. • We show the effects of hydrostatic pressure and magnetic field on the D{sub 2}{sup 0} spectrum. • The use of hydrostatic pressure provides higher thermal stability to the D{sub 2}{sup 0} complex.

  20. Uranyl complexes formed with a para-t-butylcalix[4]arene bearing phosphinoyl pendant arms on the lower rim. Solid and solution studies

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez, F. de M. [Instituto Nacional de Investigaciones Nucleares, La Marquesa, Ocoyoacac (Mexico). Dept. de Quimica; Varbanov, S. [Bulgarian Academy of Sciences, Sofia (Bulgaria). Inst. of Organic Chemistry with Center of Phytochemistry; Buenzli, J.C.G. [Ecole Polytechnique Federale de Lausanne (EPFL) (Switzerland). Inst. of Chemical Sciences and Engineering; Rivas-Silva, J.F.; Ocana-Bribiesca, M.A. [Instituto de Fisica de la BUAP, Puebla (Mexico); Cortes-Jacome, M.A.; Toledo-Antonio, J.A. [Instituto Mexicano del Petroleo/Programa de Ingenieria Molecular (Mexico)

    2012-07-01

    The current interest in functionalized calixarenes with phosphorylated pendant arms resides in their coordination ability towards f elements and capability towards actinide/rare earth separation. Uranyl cation forms 1:1 and 1:2 (M:L) complexes with a tetra-phosphinoylated p-tert-butylcalix[4]arene, B{sub 4}bL{sup 4}: UO{sub 2}(NO{sub 3}){sub 2}(B{sub 4}bL{sup 4}){sub n} . xH{sub 2}O (n = 1, x = 2, 1; n = 2, x = 6, 2). Spectroscopic data point to the inner coordination sphere of 1 containing one monodentate nitrate anion, one water molecule and the four phosphinoylated arms bound to UO{sub 2}{sup 2+} while in 2, uranyl is only coordinated to calixarene ligands. In both cases the U(VI) ion is 8-coordinate. Uranyl complexes display enhanced metal-centred luminescence due to energy transfer from the calixarene ligands; the luminescence decays are bi-exponential with associated lifetimes in the ranges 220 {mu}s < {tau}{sub s} < 250 {mu}s and 630 {mu}s < {tau}{sub L} < 640 {mu}s, pointing to the presence of two species with differently coordinated calixarene, as substantiated by a XPS study of U(4f{sub 5/2,7/2}), O(1s) and P(2p) levels on solid state samples. The extraction study of UO{sub 2}{sup 2+} cation and trivalent rare-earth (Y, La, Eu) ions from acidic nitrate media by B{sub 4}bL{sup 4} in chloroform shows the uranyl cation being much more extracted than rare earths. (orig.)

  1. Electrical manipulation of spin states in a single electrostatically gated transition-metal complex

    DEFF Research Database (Denmark)

    Osorio, Edgar A; Moth-Poulsen, Kasper; van der Zant, Herre S J

    2010-01-01

    -field on the Mn-atom. Adding a single electron thus stabilizes the low-spin configuration and the corresponding sequential tunnelling current is suppressed by spin-blockade. From low-temperature inelastic cotunneling spectroscopy, we infer the magnetic excitation spectrum of the molecule and uncover also...... a strongly gate-dependent singlet-triplet splitting on the low-spin side. The measured bias-spectroscopy is shown to be consistent with an exact diagonalization of the Mn-complex, and an interpretation of the data is given in terms of a simplified effective model....

  2. Clinical features and pathophysiology of Complex Regional Pain Syndrome – current state of the art

    Science.gov (United States)

    Marinus, Johan; Moseley, G. Lorimer; Birklein, Frank; Baron, Ralf; Maihöfner, Christian; Kingery, Wade S.; van Hilten, Jacobus J.

    2017-01-01

    That a minor injury can trigger a complex regional pain syndrome (CRPS) - multiple system dysfunction, severe and often chronic pain and disability - has fascinated scientists and perplexed clinicians for decades. However, substantial advances across several medical disciplines have recently increased our understanding of CRPS. Compelling evidence implicates biological pathways that underlie aberrant inflammation, vasomotor dysfunction, and maladaptive neuroplasticity in the clinical features of CRPS. Collectively, the evidence points to CRPS being a multifactorial disorder that is associated with an aberrant host response to tissue injury. Varying susceptibility to perturbed regulation of any of the underlying biological pathways probably accounts for the clinical heterogeneity of CRPS. PMID:21683929

  3. Solid state structure of thorium(IV) complexes with common aminopoly-carboxylate ligands

    International Nuclear Information System (INIS)

    Thuery, Pierre

    2011-01-01

    The crystal structures of the complexes formed by reaction of thorium(IV) nitrate with iminodiacetic acid (H 2 IDA), nitrilotriacetic acid (H 3 NTA), and ethylenediaminetetraacetic acid (H 4 EDTA) under hydrothermal conditions are reported. In [Th(HIDA) 2 (C 2 O 4 )].H 2 O (1), the metal atom is chelated by two carboxylate groups from two HIDA - anions and by two oxalate ligands formed in situ; two additional oxygen atoms from two more HIDA - anions complete the ten-coordinate environment of bi-capped square anti-prismatic geometry. The uncoordinated nitrogen atom is protonated and involved in hydrogen bonding. Two different ligands are present in [Th(NTA)(H 2 NTA)(H 2 O)].H 2 O (2), one of them being a O 3 ,N-chelating tri-anion which acts also as a bridge toward two neighboring metal ions, and the other being a bis-monodentate bridging species with an uncoordinated carboxylic arm and a central ammonium group. An aqua ligand completes the nine-coordinated, capped square anti-prismatic metal environment. The EDTA 4- anion in [Th(EDTA)(H 2 O)].2H 2 O (3) is chelating through one oxygen atom from each carboxylate group and the two nitrogen atoms, as in a previously reported molecular complex. Two carboxylate groups are bridging, which, with the addition of an aqua ligand, gives a capped square anti-prismatic coordination polyhedron. Aminopoly-carboxylate ligands have been much investigated in relation with actinide decorporation and nuclear wastes management studies, and the present results add to the structural information available on their complexes with thorium(IV), which has mainly been obtained up to now by extended X-ray absorption fine structure (EXAFS) spectroscopy. In particular, the bridging (non-chelating) coordination mode of H 2 NTA - is a novel feature in this context. All three complexes crystallize as two-dimensional assemblies and are thus novel examples of thorium-organic coordination polymers. (author)

  4. Application of NIR - CRDS for state selective study of recombination of para and ortho H{sub 3}{sup +} ions with electrons in low temperature plasma

    Energy Technology Data Exchange (ETDEWEB)

    Varju, J; Roucka, S; KotrIk, T; Plasil, R; Glosik, J, E-mail: Juraj.Glosik@mff.cuni.c [Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holesovickach 2, Prague 8 (Czech Republic)

    2010-05-01

    We present a study of H{sub 3}{sup +} recombination performed at 77 K on the two lowest rotational levels of this ion, which belong to its two different nuclear spin states of the studied ion. A near infrared cavity ring-down spectrometer ({approx}1381 nm, CRDS arrangement) has been used to obtain the time evolution of concentration of both states. From the overall ion density decay during the afterglow we obtained the binary recombination rate coefficient {alpha}{sub bin} (77 K) = 1.2x10{sup -7} cm{sup 3}s{sup -1}. We have also observed ternary helium assisted recombination of both para and ortho H{sub 3}{sup +}. The process is very slow (at 77 K) and the obtained ternary recombination rate coefficient is in contradiction with the theoretical prediction. It is the first time that the binary and ternary H{sub 3}{sup +} recombination rate coefficient was measured at a known population of para and ortho H{sub 3}{sup +} ions in decaying plasma.

  5. Occurrence of anti-Brucella abortus and anti-Leptospira spp. antibodies in buffaloes from Paraíba state, Northeastern Brazil

    Directory of Open Access Journals (Sweden)

    Arthur Willian de Lima Brasil

    2015-07-01

    Full Text Available The objective of this study was to determine the frequency of animals that tested positive for brucellosis and leptospirosis and the risk factors for these diseases in the State of Paraíba. A total of 136 buffaloes from 14 herds were examined. For brucellosis, we used the buffered acidified plate antigen (BAPA test as screening method and 2-mercaptoethanol as confirmatory test. For leptospirosis, we conducted a microscopic agglutination test (MAT, with a cut-off point of 1:100. Of the animals examined, two [1.5%; 95% CI = 0.4%–5.2%] were positive for brucellosis, and 38 (27.9%; 95% CI = 21.1%–36.0% were positive for leptospirosis. The brucellosis-positive animals were from two (14.3% herds, while nine (64.3% herds had leptospirosis-seropositive animals. The more frequent Leptospira spp. serotypes were Bratislava, Pomona, and Canicola. We concluded that leptospirosis was widespread in buffaloes in the state of Paraíba and suggested that breeding alongside horses and pigs might be na important factor in the spread of leptospirosis-positive animals. The presence of brucellosispositive animals indicated the possibility of negative-impacting measures on disease control in bovines, and it is therefore recommended that greater attention be given to these animals for brucellosis control.

  6. Prevalence and risk factors associated with goat gastrointestinal helminthiasis in the Sertão region of Paraíba State, Brazil.

    Science.gov (United States)

    Vieira, Vanessa Diniz; Feitosa, Thais Ferreira; Vilela, Vinícius Longo Ribeiro; Azevedo, Sérgio Santos; de Almeida Neto, João Leite; de Morais, Dayana Firmino; Ribeiro, Ana Raquel Carneiro; Athayde, Ana Célia Rodrigues

    2014-02-01

    Gastrointestinal helminthiasis represents an obstacle to goat raising, causing severe damage to herds such as growth retardation, weight loss, and even death. In this study, we aimed to determine the prevalence and risk factors associated to goat gastrointestinal helminthiasis in the Sertão region of Paraíba State, Brazil. A total of 256 goats from 54 farms were systematically sampled. Blood and fecal samples were collected from each animal for egg per gram (EPG), larval culture, and packed cell volume (PCV) analyses. We found that 79.3% of the goats investigated were parasitized with gastrointestinal helminths. Significant correlation (p = 0.004) was observed between the EPG and PCV of the animals studied, and it was observed that the EPG increases as the PCV decreases. In the larval culture, the most prevalent helminth was Haemonchus sp. (83.2%). Age and sex were significant variables (p ≤ 0.20) for the development of gastrointestinal helminths: 86.8% of animals over 36 months of age and 81.7% of females were infected. The variable type of animal exploitation was also significant, with 90.3% (p ≤ 0.20) of the animals presenting double suitability (milk and meat). The Sertão region of Paraíba State presents high prevalence of gastrointestinal helminthiasis in goats, and age and type of animal exploitation are the most relevant risk factors to the development of these parasites.

  7. Granulitic orthogneisses geochemistry of Caraiba complex, in Riachao do Jacuipe region - Bahia state, Brazil

    International Nuclear Information System (INIS)

    Teixeira, L.R.; Mello, R.C.

    1990-01-01

    This paper describes the granulitic orthogneisses of the Riachao do Jacuipe unit (Caraiba Complex) petrographicaly classified as tonalitic (predominating), trondhjemitic, granodioritic and quartz dioritic hyperstene gneisses. The chemical composition of the orthogneisses is dominantly tonalitic/granodioritic, that is typical of a calc-alkaline parentage depleted in K and enriched in Al sub(2) O sub(3). Their geochemical characteristics are very similar to those of the grey gneisses of other regions of the world, usually named TTG (tonalite-trondhhemite-granodiorite). In the sequence of orthogneiss coexist rocks both normal and depleted in LILE. The patterns of distribution of highly fractioned REE (La/YbN ratio up to 102) with Eu anomaly small or absent points against a direct mantle origin. On the other hand the only Rb-Sr age determination in the se rocks gives an age of 2,35 Ga with an initial ratio (Ro) of 0,702. This initial ratio suggests that the rocks did not originated from reworking of a much older continental crust. The available data suggest that the granulitized orthogneisses of the Caraiba Complex were formed by partial melt of basaltic material (amphibalitized oceanic crust). (author)

  8. CLASSIFICATION AND COMPLEX STATE VALUE OF SHOPPING CENTERS: PROJECT-ORIENTED APPROACH

    Directory of Open Access Journals (Sweden)

    Юрій Павлович РАК

    2016-02-01

    Full Text Available Was done the analysis of projects objects of trade and entertainment centers from the perspective of improving the life safety and is proposed the definition of "Trade and entertainment center", "Trade and entertainment center" and "Complex value of trade and entertainment center." A classification of shopping centers on the classification criteria and the criteria are characterized by increased security status and attractiveness of their operation. The classification of trade and entertainment centers on the criteria of classification features were made. It characterizes the security situation and will increase the attractiveness of their operation. In the nearest future the most secure and modern TEC will be those buildings who will have unique qualities such as safety systems, excellent customer service, and thus by a high level of trust (the client to the mall. The important role will play those TEC, who have clearly formed value oriented project management, including communication values using innovative methods and models. Trade and entertainment centers as an organization are included in the complex process of interaction management. They being both as an enterprise that serves the public and satisfying a great range of his interests and architectural site, which is leased and increases the business attractiveness of the district of TEC location. This duality of the essence of TEC center makes difficult to assess the effectiveness of its security.

  9. Isotopic geochronology of the Western Carpathian crystalline complex: the present state

    International Nuclear Information System (INIS)

    Cambel, B.; Kral, J.

    1989-01-01

    Main events in the Western Carpathian crystalline complex documented by the U-Th-Pb, Rb-Sr, K-Ar and FT methods are as follows: Regional metamorphism of sedimentary rocks from the Tatric unit documented by isotopic homogenization of the 87 Sr/ 86 Sr ratio took place 400 million years ago (Silurian-Devonian boundary). Subsequent metamorphism of these rocks is associated with intrusions of granitoid bodies. The age of rhyolite volcanism of Gelnica sequence in the Gemericum is identical with that of the first stage of regional metamorphism. Granitoid plutonism covers a long time interval ranging from 390 to 280 million years. The presence of late Alpine granites has not yet been proved. Cooling of rocks from the crystalline complex to a temperature of ca. 270 degC was attained in the Tatric rocks ca. 300 million years ago and in the Veporic (Gemeric) rocks ca. 90-120 million years ago. The latest post-orogenic uplift differs in the Tatricum (most often Miocene) and the Veporicum (Upper Cretaceous). (author). 8 fis., 1 tab., 51 refs

  10. Studies of lysine cyclodeaminase from Streptomyces pristinaespiralis: Insights into the complex transition NAD+ state.

    Science.gov (United States)

    Ying, Hanxiao; Wang, Jing; Shi, Ting; Zhao, Yilei; Wang, Xin; Ouyang, Pingkai; Chen, Kequan

    2018-01-01

    Lysine cyclodeaminase (LCD) catalyzes the piperidine ring formation in macrolide-pipecolate natural products metabolic pathways from a lysine substrate through a combination of cyclization and deamination. This enzyme belongs to a unique enzyme class, which uses NAD + as the catalytic prosthetic group instead of as the co-substrate. To understand the molecular details of NAD + functions in lysine cyclodeaminase, we have determined four ternary crystal structure complexes of LCD-NAD + with pipecolic acid (LCD-PA), lysine (LCD-LYS), and an intermediate (LCD-INT) as ligands at 2.26-, 2.00-, 2.17- and 1.80 Å resolutions, respectively. By combining computational studies, a NAD + -mediated "gate keeper" function involving NAD + /NADH and Arg49 that control the binding and entry of the ligand lysine was revealed, confirming the critical roles of NAD + in the substrate access process. Further, in the gate opening form, a substrate delivery tunnel between ε-carboxyl moiety of Glu264 and the α-carboxyl moiety of Asp236 was observed through a comparison of four structure complexes. The LCD structure details including NAD + -mediated "gate keeper" and substrate tunnel may assist in the exploration the NAD + function in this unique enzyme class, and in regulation of macrolide-pipecolate natural product synthesis. Copyright © 2017 Elsevier Inc. All rights reserved.

  11. Torsional, Vibrational and Vibration-Torsional Levels in the S_{1} and Ground Cationic D_{0}^{+} States of Para-Fluorotoluene

    Science.gov (United States)

    Gardner, Adrian M.; Tuttle, William Duncan; Whalley, Laura E.; Claydon, Andrew; Carter, Joseph H.; Wright, Timothy G.

    2017-06-01

    The S_{1} electronic state and ground state of the cation of para-fluorotoluene (pFT) have been investigated using resonance-enhanced multiphoton ionization (REMPI) spectroscopy and zero-kinetic-energy (ZEKE) spectroscopy. Here we focus on the low wavenumber region where a number of "pure" torsional, fundamental vibrational and vibration-torsional levels are expected; assignments of observed transitions are discussed, which are compared to results of published work on toluene (methylbenzene) from the Lawrance group. The similarity in the activity observed in the excitation spectrum of the two molecules is striking. A. M. Gardner, W. D. Tuttle, L. Whalley, A. Claydon, J. H. Carter and T. G. Wright, J. Chem. Phys., 145, 124307 (2016). J. R. Gascooke, E. A. Virgo, and W. D. Lawrance J. Chem. Phys., 143, 044313 (2015).

  12. Estimativas de chuvas intensas para o Estado de Goiás Intense rainfall estimates for the Goiás State, Brazil

    Directory of Open Access Journals (Sweden)

    Luiz F. C. de Oliveira

    2008-03-01

    Full Text Available A ausência de estações pluviográficas e de séries históricas longas, tem levado os Engenheiros à utilização de metodologias que permitam expressar a relação intensidade-duração-freqüência de precipitações críticas. Com o objetivo de estimar as alturas de chuvas intensas, associadas a uma duração e freqüência, desenvolveu-se uma rotina computacional para ajustar os parâmetros do modelo de Bell para alguns municípios do Estado de Goiás. Para tal, empregaram-se séries históricas de precipitações diárias e de relações intensidade-duração-freqüência disponíveis para alguns municípios. Determinou-se, também, a relação entre a precipitação de 60 minutos e 1 dia de duração, para um período de retorno de dois anos. As informações geradas neste trabalho foram regionalizadas, permitindo a geração de mapas temáticos, visando a estimar a altura precipitada-duração-freqüência para as localidades desprovidas de registros. Para os municípios estudados, o modelo de Bell se ajustou-se perfeitamente, apresentando alternativa interessante na obtenção das alturas de chuvas intensas a partir de séries curtas. A reconstrução do modelo de Bell a partir da regionalização dos parâmetros ajustados permitiu a ampliação das equações que expressam a relação entre a precipitação máxima para diferentes durações e o período de retorno com baixos valores no erro-padrão da estimativa.The absence of pluviograph stations and of long historical series has induced engineers to use methodologies that allow them to express the intensity-duration-frequency relation of critical rainfalls. With the purpose of estimating the height of intense rain associated to a given duration and frequency, it was developed a computational routine to adjust the parameters of the BellÂ’s model to some municipal districts of the Goiás State. For such work it was employed historical series of daily precipitation and intensity

  13. Theoretical investigation of potential energy surface and bound states for the van der Waals complex Ar–BrCl dimer

    Energy Technology Data Exchange (ETDEWEB)

    Zheng, Rui [School of Mathematics and Information Science, North China University of Water Resources and Electric Power, Zhengzhou (China); Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan (China); Li, Song, E-mail: lsong@yangtzeu.edu.cn [School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou (China); Chen, Shan-Jun; Chen, Yan [School of Physics and Optoelectronic Engineering, Yangtze University, Jingzhou (China); Zheng, Li-Min [Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Centre for Magnetic Resonance, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan (China)

    2015-09-08

    Highlights: • A two-dimensional potential for Ar–BrCl is constructed at the CCSD(T) level. • The PES is characterized by three minima and two saddle points between them. • Bound state calculations were carried out for the complex. - Abstract: The intermolecular potential energy surface (PES) of the ground electronic state for the Ar–BrCl dimer is constructed at the CCSD(T) level with the aug-cc-pVQZ basis set and mid-bond functions. The PES is characterized by three minima and two saddle points. The global minimum corresponding to a collinear Ar–BrCl configuration, which has been observed experimentally, is located at R = 4.10 Å and θ = 2.5° with a well depth of −285.207 cm{sup −1}. A nearly T-shaped structure and an anti-linear Ar–ClBr geometry is also predicted. The bound state calculations are preformed to study intermolecular vibrational modes, rotational levels and average structures for the complex. Our transition frequencies, spectroscopic constants and average structures for all isotopomers of the collinear isomer agree well with experimental data. We have also provided pure rotational transitional frequencies for both nearly T-shaped and anti-linear isomers. These results are significant for further experimental investigations of the Ar–BrCl dimer.

  14. Homoleptic Ce(III) and Ce(IV) Nitroxide Complexes: Significant Stabilization of the 4+ Oxidation State

    Energy Technology Data Exchange (ETDEWEB)

    Bogart, Justin A.; Lewis, Andrew J.; Medling, Scott A.; Piro, Nicholas A.; Carroll, Patrick J.; Booth, Corwin H.; Schelter, Eric J.

    2014-06-25

    Electrochemical experiments performed on the complex Ce-IV[2-((BuNO)-Bu-t)py](4), where [2-((BuNO)-Bu-t)py](-) = N-tert-butyl-N-2-pyridylnitroxide, indicate a 2.51 V stabilization of the 4+ oxidation state of Ce compared to [(Bu4N)-Bu-n](2)[Ce(NO3)(6)] in acetonitrile and a 2.95 V stabilization compared to the standard potential for the ion under aqueous conditions. Density functional theory calculations suggest that this preference for the higher oxidation state is a result of the tetrakis(nitroxide) ligand framework at the Ce cation, which allows for effective electron donation into, and partial covalent overlap with, vacant 4f orbitals with delta symmetry. The results speak to the behavior of CeO2 and related solid solutions in oxygen uptake and transport applications, in particular an inherent local character of bonding that stabilizes the 4+ oxidation state. The results indicate a cerium(IV) complex that has been stabilized to an unprecedented degree through tuning of its ligand-field environment.

  15. Binary-State Dynamics on Complex Networks: Pair Approximation and Beyond

    Directory of Open Access Journals (Sweden)

    James P. Gleeson

    2013-04-01

    Full Text Available A wide class of binary-state dynamics on networks—including, for example, the voter model, the Bass diffusion model, and threshold models—can be described in terms of transition rates (spin-flip probabilities that depend on the number of nearest neighbors in each of the two possible states. High-accuracy approximations for the emergent dynamics of such models on uncorrelated, infinite networks are given by recently developed compartmental models or approximate master equations (AMEs. Pair approximations (PAs and mean-field theories can be systematically derived from the AME. We show that PA and AME solutions can coincide under certain circumstances, and numerical simulations confirm that PA is highly accurate in these cases. For monotone dynamics (where transitions out of one nodal state are impossible, e.g., susceptible-infected disease spread or Bass diffusion, PA and the AME give identical results for the fraction of nodes in the infected (active state for all time, provided that the rate of infection depends linearly on the number of infected neighbors. In the more general nonmonotone case, we derive a condition—that proves to be equivalent to a detailed balance condition on the dynamics—for PA and AME solutions to coincide in the limit t→∞. This equivalence permits bifurcation analysis, yielding explicit expressions for the critical (ferromagnetic or paramagnetic transition point of such dynamics, that is closely analogous to the critical temperature of the Ising spin model. Finally, the AME for threshold models of propagation is shown to reduce to just two differential equations and to give excellent agreement with numerical simulations. As part of this work, the Octave or Matlab code for implementing and solving the differential-equation systems is made available for download.

  16. Influência das precipitações na produtividade agrícola no Estado da Paraíba Influence of precipitations on agricultural productivity in Paraíba State

    Directory of Open Access Journals (Sweden)

    Lindenberg L. da Silva

    2009-08-01

    Full Text Available Neste estudo, realizado em quatro microrregiões da Paraíba no período de 1990 a 2005, objetivou-se determinar as correlações entre as precipitações pluviais durante a safra para as culturas de cana-de-açúcar e abacaxi, nas microrregiões do Litoral e Brejo, e as correlações entre as precipitações durante o período chuvoso e as produtividades de algodão herbáceo, na microrregião do Sertão e do sisal, no Cariri/Curimataú. Os testes realizados com as equações de regressões polinomiais utilizando-se apenas a precipitação pluvial da pré-estação chuvosa ou do período chuvoso como variável independente, não foram suficientes para estimar a produtividade da cana-de-açúcar no Litoral, vez que pequenos volumes de precipitação não suprem as necessidades hídricas da cultura. A produtividade do abacaxi não mostrou correlações significativas com as precipitações pluviais nas microrregiões do Litoral e Brejo. Obtiveram-se fortes correlações entre as precipitações pluviais durante o período chuvoso e as produtividades de algodão herbáceo no Sertão paraibano e, para o sisal no Cariri/Curimataú. Com a estimativa da precipitação durante o período chuvoso poder-se-á decidir plantar, ou não, em determinada microrregião.This study was carried out in four homogeneous pluviometric micro regions of Paraíba State between 1990 and 2005. The aims were to determine the relationships between crops of sugar-cane and pineapple productivity and production season rainfall in the Litoral and 'Brejo' micro regions, the relationships between the rainy season precipitations and herbecious cotton productivity in the Sertão, and sisal in the Cariri/Curimataú micro regions. Tests accomplished with polinomial regression equations, using only early rainy season or rainy season as the independent variable were not sufficient to estimate sugar-cane productivity in the Litoral, therefore small rainfall quantities do not supply the

  17. Magnitude, tendência temporal e fatores associados à anemia em crianças do Estado da Paraíba Magnitud, tendencia temporal y factores asociados a la anemia en niños del Estado de Paraíba Magnitude, time trends and factors associate with anemia in children in the state of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Sheila Sherezaide Rocha Gondim

    2012-08-01

    Full Text Available OBJETIVO: Estimar a prevalência da anemia em crianças, sua tendência temporal e identificar fatores associados. MÉTODOS: Estudo de corte transversal, de base populacional, envolvendo 1.108 crianças, com idade entre seis e 59 meses, de ambos os sexos, do Estado da Paraíba, em 2007. A hemoglobina foi analisada em sangue venoso com contador automático. Foram considerados para anemia valores OBJETIVO: Estimar la prevalencia de la anemia en niños, su tendencia temporal e identificar factores asociados. MÉTODOS: Estudio de corte transversal, de base poblacional, involucrando 1.108 niños, con edad entre 6 a 59 meses, de ambos sexos, del Estado de Paraíba, en 2007. La hemoglobina fue analizada en sangre venosa con contador automático. Se consideraron para anemia valores OBJECTIVE: To estimate the magnitude of the anemia, to analyze the time trends and investigate the factors associated with this disturbance in children in the state of Paraíba, Brazil. METHODS: A cross-sectional survey, of population-based, with 1108 children, aged 6 to 59 months, both sexes in the state of Paraíba. Hemoglobin (Hb in venous blood was analyzed with an automatic counter. The social-economic and demographic characteristics of children were obtained by questionnaire. Proportions were compared by Pearson's chi-squared test, and the association between hemoglobin concentrations and potential risk factors was tested by regression model Poisson. The time trend of anemia was assessed by the increase/decreased in the prevalence of anemia, using as comparison the prevalence observed in the years 1982, 1992 and 2007. RESULTS: The prevalence of anemia (Hb < 11.0 g/dl in the state of Paraíba was 36.5% (CI95% 33.7 to 39.3. It was observed that 1.3% (CI95% 0.7 to 1.8 were in severe form (Hb <7.0 g/dl, 11% (CI95% 9.4 to 13.5 in a moderate form and 87.6% (CI95% 79.1 to 91.2 in the mild form. There was an increase 88.5% in cases of anemia between the years 1982-1992 and

  18. A spin-frustrated trinuclear copper complex based on triaminoguanidine with an energetically well-separated degenerate ground state.

    Science.gov (United States)

    Spielberg, Eike T; Gilb, Aksana; Plaul, Daniel; Geibig, Daniel; Hornig, David; Schuch, Dirk; Buchholz, Axel; Ardavan, Arzhang; Plass, Winfried

    2015-04-06

    We present the synthesis and crystal structure of the trinuclear copper complex [Cu3(saltag)(bpy)3]ClO4·3DMF [H5saltag = tris(2-hydroxybenzylidene)triaminoguanidine; bpy = 2,2'-bipyridine]. The complex crystallizes in the trigonal space group R3̅, with all copper ions being crystallographically equivalent. Analysis of the temperature dependence of the magnetic susceptibility shows that the triaminoguanidine ligand mediates very strong antiferromagnetic interactions (JCuCu = -324 cm(-1)). Detailed analysis of the magnetic susceptibility and magnetization data as well as X-band electron spin resonance spectra, all recorded on both powdered samples and single crystals, show indications of neither antisymmetric exchange nor symmetry lowering, thus indicating only a very small splitting of the degenerate S = (1)/2 ground state. These findings are corroborated by density functional theory calculations, which explain both the strong isotropic and negligible antisymmetric exchange interactions.

  19. Parcerias para o desenvolvimento produtivo: a constituição de redes sociotécnicas no Complexo Econômico-Industrial da Saúde | Partnerships for productive development: the establishment of socio-technical networks in the Economic-Industrial Complex of Health

    Directory of Open Access Journals (Sweden)

    Gabriela de Oliveira Silva

    2017-02-01

    Full Text Available As Parcerias para o Desenvolvimento Produtivo (PDP são um instrumento do Estado brasileiro para o desenvolvimento do Complexo Econômico Industrial da Saúde e para a busca da prerrogativa constitucional da saúde como direito fundamental. Estas parcerias envolvem a cooperação entre laboratórios públicos e privados para: desenvolvimento, transferência e absorção de tecnologia, produção, capacitação produtiva e tecnológica do País em produtos estratégicos para atendimento às demandas do Sistema Único de Saúde, utilizando, para tal, o poder de compra do Ministério da Saúde. A partir da pesquisa documental, identificaram-se os atores sociais envolvidos nesse processo e suas interações e construiu-se graficamente, pelo software Gephi, as redes sociotécnicas constituídas a partir das PDP de medicamentos. Verificou-se que a gestão eficiente das parcerias depende primordialmente da articulação efetiva de vários atores de diferentes órgãos ministeriais, Anvisa, agências de fomento e entidades públicas e privadas, sendo importante que cada ator também se reconheça como peça fundamental do processo para que os resultados obtidos a partir desta iniciativa possam ser aprimorados. ============================================= Partnerships for Productive Development (PDP are an instrument of the Brazilian state for the development of the Industrial Economic Health Complex and for accomplishing the constitutional prerogative of health as a fundamental right. These partnerships involve cooperation between public and private laboratories for the development, transfer and absorption of technology, production, productive and technological capacity of the country in strategic products to meet the demands of the “Sistema Único de Saúde”, using for this, the purchasing power of the Ministry of Health. From a documentary research, the actors involved in these processes and their interactions were identified; and the socio

  20. Efficient determination of the Markovian time-evolution towards a steady-state of a complex open quantum system

    Science.gov (United States)

    Jonsson, Thorsteinn H.; Manolescu, Andrei; Goan, Hsi-Sheng; Abdullah, Nzar Rauf; Sitek, Anna; Tang, Chi-Shung; Gudmundsson, Vidar

    2017-11-01

    Master equations are commonly used to describe time evolution of open systems. We introduce a general computationally efficient method for calculating a Markovian solution of the Nakajima-Zwanzig generalized master equation. We do so for a time-dependent transport of interacting electrons through a complex nano scale system in a photon cavity. The central system, described by 120 many-body states in a Fock space, is weakly coupled to the external leads. The efficiency of the approach allows us to place the bias window defined by the external leads high into the many-body spectrum of the cavity photon-dressed states of the central system revealing a cascade of intermediate transitions as the system relaxes to a steady state. The very diverse relaxation times present in the open system, reflecting radiative or non-radiative transitions, require information about the time evolution through many orders of magnitude. In our approach, the generalized master equation is mapped from a many-body Fock space of states to a Liouville space of transitions. We show that this results in a linear equation which is solved exactly through an eigenvalue analysis, which supplies information on the steady state and the time evolution of the system.

  1. Expanding rare-earth oxidation state chemistry to molecular complexes of holmium(II) and erbium(II).

    Science.gov (United States)

    MacDonald, Matthew R; Bates, Jefferson E; Fieser, Megan E; Ziller, Joseph W; Furche, Filipp; Evans, William J

    2012-05-23

    The first molecular complexes of holmium and erbium in the +2 oxidation state have been generated by reducing Cp'(3)Ln [Cp' = C(5)H(4)SiMe(3); Ln = Ho (1), Er (2)] with KC(8) in the presence of 18-crown-6 in Et(2)O at -35 °C under argon. Purification and crystallization below -35 °C gave isomorphous [(18-crown-6)K][Cp'(3)Ln] [Ln = Ho (3), Er (4)]. The three Cp' ring centroids define a trigonal-planar geometry around each metal ion that is not perturbed by the location of the potassium crown cation near one ring with K-C(Cp') distances of 3.053(8)-3.078(2) Å. The metrical parameters of the three rings are indistinguishable within the error limits. In contrast to Ln(2+) complexes of Eu, Yb, Sm, Tm, Dy, and Nd, 3 and 4 have average Ln-(Cp' ring centroid) distances only 0.029 and 0.021 Å longer than those of the Ln(3+) analogues 1 and 2, a result similar to that previously reported for the 4d(1) Y(2+) complex [(18-crown-6)K][Cp'(3)Y] (5) and the 5d(1) La(2+) complex [K(18-crown-6)(Et(2)O)][Cp″(3)La] [Cp″ = 1,3-(Me(3)Si)(2)C(5)H(3)]. Surprisingly, the UV-vis spectra of 3 and 4 are also very similar to that of 5 with two broad absorptions in the visible region, suggesting that 3-5 have similar electron configurations. Density functional theory calculations on the Ho(2+) and Er(2+) species yielded HOMOs that are largely 5d(z(2)) in character and supportive of 4f(10)5d(1) and 4f(11)5d(1) ground-state configurations, respectively.

  2. Current state and development trends of the agroindustrial complex and rural territories of Perm Region

    Directory of Open Access Journals (Sweden)

    Gennadiy Vladimirovich Klimenkov

    2011-12-01

    Full Text Available Analysis of regional agricultural sector status and rural areas of Perm in 1990-2011 years indicates a systemic crisis of agriculture in Perm region, which is largely determined by the fact that Perm region has no strategy or strategic plan and program for sustainable agricultural sector and rural areas of Perm region development, there is no scheme of territorial development and master plans of territorial development with the development of agro-industrial complex of Perm region. In these circumstances, there is a steady downward trend in production, weakening and bankruptcy of enterprises, social impoverishment of rural areas, appearance of many of irreversible processes (sale and neglect of agricultural land, demographic problems associated with low living standards, population migration, policy optimization in the areas of education and health, union of territories, policy of depopulation of territories etc.. This paper presents main recommendations for improving the situation in agriculture of Perm region.

  3. Contribution to the geochronology of the Lages alkaline complex, state of Santa Catarina, Brazil

    International Nuclear Information System (INIS)

    Scheibe, L.F.; Kawashita, K.; Barros Gomes, C. de

    1985-01-01

    Field evidences and petrogentic inferences at the Lages alkaline complex are indicative of a lithological sequence, considering a single petrogenetic linneage: ultrabasic alkaline rocks, porphyritic phonolites, agpaitic phonolites, analcite trachytes, carbonatites and pipe breccias. Eleven new K/Ar determinations, as well as six already available, show a major concentration in the 65 to 75 m.y. range, with a mode of Ca. 70 m.y. in place of the previously preferred K/Ar age of 65 m.y. for the complex. A Rb/Sr whole rock reference isochron diagram of analytical results for phonolites from the Serra da Chapada gives an age of 82 +- m.y. and an initial Sr 87 /Sr 86 ratio of 0.7060 +- 0.0015 which is in good agreement, considering the analytical error with the 0.7052 and 0.7056 +- 0.0014 ratios determined for the Sr-rich porphiritic nepheline syenites from the Cerro Alto de Cima. A hystogram of K/Ar ages shows a preference for older ages in the porphyritic nepheline syenites, while the phonolites prefer the 65-70 m.y. range. Most of the pipe breccias plot between 70 and 75 m.y. The two younger ages are for the olivine melilitite and the Janjao Kimberlite. Disregarding possible analitical imprecisions, these tendencies ractify the younger age for the agpaitic phonolites when compared to the porphyritic nepheline syenites, but do not fit with the petrogenetic scheme indicated above. This overall picture may suggest a revision of the proposed sequence or, alternatively, be interpreted as an indirect evidence that the determined K/Ar ages do not represent the crystallization age of these rocks, but later thermal events, as suggested by Kawashita et al. (1984) for the Pocos de Caldas massif. (D.J.M.) [pt

  4. Clinical and mycological study of scalp white piedra in the State of Paraíba, Brazil.

    Science.gov (United States)

    Pontes, Zélia Braz Vieira da Silva; Ramos, Adriano Lira; Lima, Edeltrudes de Oliveira; Guerra, Maria de Fátima de Lacerda; Oliveira, Neuza Maria Cavalcante; Santos, Jozemar Pereira dos

    2002-07-01

    White piedra is a superficial mycoses characterized by nodules on the hair shaft, caused by the basidiomycetous yeasts. In the present study, clinical and mycological findings of scalp white piedra caused by Trichosporon spp. are related. Twenty three cases of scalp white piedra were observed with a high incidence in women (87%) and preschool children from 2 to 6 (74%) years old. These groups presented a relationship of dependence with this infection. Despite the low socio-economic status, poor standards of hygiene, (48% of the patients) as well as the fact that 30.4% of the children shared the same nursery, these factors were not significant for the transmission of the mycosis. These were the first reports of scalp white piedra in João Pessoa city, Paraíba, Brazil.

  5. Clinical and mycological study of scalp white piedra in the State of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Zélia Braz Vieira da Silva Pontes

    2002-07-01

    Full Text Available White piedra is a superficial mycoses characterized by nodules on the hair shaft, caused by the basidiomycetous yeasts. In the present study, clinical and mycological findings of scalp white piedra caused by Trichosporon spp. are related. Twenty three cases of scalp white piedra were observed with a high incidence in women (87% and preschool children from 2 to 6 (74% years old. These groups presented a relationship of dependence with this infection. Despite the low socio-economic status, poor standards of hygiene, (48% of the patients as well as the fact that 30.4% of the children shared the same nursery, these factors were not significant for the transmission of the mycosis. These were the first reports of scalp white piedra in João Pessoa city, Paraíba, Brazil.

  6. Estado nutricional relativo ao zinco de crianças que frequentam creches do estado da Paraíba Zinc nutritional status in children attending public daycare centers in the state of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Dixis Figueroa Pedraza

    2011-08-01

    Full Text Available OBJETIVO: Avaliar o estado nutricional relativo ao zinco de crianças assistidas em creches do Estado da Paraíba. MÉTODOS: O estado nutricional relativo ao zinco de 235 crianças pré-escolares foi avaliado através de sua concentração no soro, da ingestão dietética de zinco e da estatura para idade, como recomendado pelo International Zinc Consultative Group. As concentrações séricas de zinco foram determinadas por espectrofotometria de absorção atômica de chama, considerando deficiência de zinco valores OBJECTIVE: This study assessed the zinc levels of children attending public daycare centers in the state of Paraíba. Brazil. METHODS: The zinc levels of 235 preschool children were evaluated through serum zinc concentration, dietary zinc intake and height-for-age, as recommended by the International Zinc Nutrition Consultative Group. Baseline zinc levels in the serum were measured by flame atomic absorption spectrophotometry, considering values <65µmol/L indicative of zinc deficiency. The 24-hour recall method was used to record food consumption, considering the food consumption of the child the day before and in the daycare center. Zinc inadequacy was analyzed according to the estimated average zinc requirement by life stage and diet type recommended by the International Zinc Nutrition Consultative Group. The World Health Organization Growth Reference was used as the reference for the height-for-age indices. Children with indices two z-scores below the median value of the reference population were considered stunted. Statistical analysis was performed by the t-test or analysis of variance by the software Statistical Package for the Social Sciences -16.0. RESULTS: The prevalence of inadequate serum zinc concentration, inadequate zinc intakes and stunting were 16.2%, 16.6% and 7.7%, respectively. Mean serum zinc was lower in children of underweight mothers than in children of normal weight mothers. CONCLUSION: The studied children

  7. Activation energies as the validity criterion of a model for complex reactions that can be in oscillatory states

    Directory of Open Access Journals (Sweden)

    Anić S.

    2007-01-01

    Full Text Available Modeling of any complex reaction system is a difficult task. If the system under examination can be in various oscillatory dynamic states, the apparent activation energies corresponding to different pathways may be of crucial importance for this purpose. In that case the activation energies can be determined by means of the main characteristics of an oscillatory process such as pre-oscillatory period, duration of the oscillatory period, the period from the beginning of the process to the end of the last oscillation, number of oscillations and others. All is illustrated on the Bray-Liebhafsky oscillatory reaction.

  8. A profissão de músico conforme apresentada em jornais paraibanos The profession of musician in the paraíba state newspapers

    Directory of Open Access Journals (Sweden)

    Sandra Souza

    2010-04-01

    Full Text Available O artigo relata estudo sobre a profissão dos músicos na Paraíba, realizado por meio da aplicação da análise de conteúdo de dois jornais diários do Estado. A referida análise foi desenvolvida com uma amostra de números referentes aos anos de 2001 e 2003. Identificaram-se quatro categorias (papel social da música; incentivo à música; profissão e organização político-associativas. Tal estudo empírico resultou na identificação de aspectos centrais e importantes na construção da identidade profissional, como: o profissionalismo versus amadorismo; o mito da fama versus o anonimato; desvalorização da chamada prata da casa versus valorização do estrangeiro, etc. Embora não esgotem o tema, situam o lugar que a profissão ocupa na sociedade e pode se constituir em fonte para a elaboração de novas questões e hipóteses para os pesquisadores que se interessarem pela temática.The article reports study on the profession of musicians in the State of Paraíba, conducted by applying the analysis of contents of two daily newspapers of the State. The analysis itself was developed with a sample of issues of the years 2001 and 2003. Four categories were identified (social role of the music; encouraging the music; profession and associative political organization. Such empirical study resulted in the identification of key and important aspects, in the construction of a professional identity, as, professionalism versus amateurism; the myth of fame versus the anonymity; the depreciation of the so-called home talent versus the value of the foreign ones, and so on. Even though this type of media does not exhaust the subject, it establishes the position that the profession occupies in the society and may constitute itself a source for the development of new questions and hypotheses for the researchers interested in the topic.

  9. Modeling of dielectric properties of complex fluids with an equation of state

    DEFF Research Database (Denmark)

    Maribo-Mogensen, Bjørn; Kontogeorgis, Georgios M.; Thomsen, Kaj

    2013-01-01

    permittivity) can be modeled simultaneously with thermodynamic properties. The static permittivity is calculated from an extension of the framework developed by Onsager, Kirkwood, and Fröhlich to associating mixtures. The thermodynamic properties are calculated from the cubic-plus-association (CPA) equation...... of state that includes the Wertheim association model as formulated in the statistical associating fluid theory (SAFT) to account for hydrogen bonding molecules. We show that, by using a simple description of the geometry of the association, we may calculate the Kirkwood g-factor as a function...

  10. Processes of globalization, economic policy and the role of state in raw materials and energy complex

    Directory of Open Access Journals (Sweden)

    Vladimír Vodzinský

    2009-09-01

    Full Text Available Authors dedicate this article to impacts of constrains in paradigm of potentials forming our society.As entire societies are assembled in certain pattern, this article is dedicated to reasoning why economical growth builton influence and a use of knowledge of the reasons would accelerate consumer orientation of reproduction cycle on the levelof ownership.Both of these, causes and reasons, result in aggravation of social order and ecological crises.End products of globalization and concomitant state economic policies do not lead to crisis solution nor do they lead to effectivedisappearance of their consequences.

  11. Para-Hermitian and para-quaternionic manifolds

    International Nuclear Information System (INIS)

    Ivanov, S.; Zamkovoy, S.

    2003-10-01

    A set of canonical para-Hermitian connections on an almost para-Hermitian manifold is defined. A Para-hermitian version of the Apostolov-Gauduchon generalization of the Goldberg-Sachs theorem in General Relativity is given. It is proved that the Nijenhuis tensor of a Nearly para-Kaehler manifolds is parallel with respect to the canonical connection. Salamon's twistor construction on quaternionic manifold is adapted to the para-quaternionic case. A locally conformally hyper-para-Kaehler (hypersymplectic) flat structure with parallel Lee form on the Kodaira-Thurston complex surfaces modeled on S 1 x SL (2, R)-tilde is constructed. Anti-self-dual locally conformally hyper-para-Kaehler (hypersymplectic) neutral metrics with non vanishing Weyl tensor are obtained on the Inoe surfaces. An example of anti-self-dual neutral metric which is not locally conformally hyper-para-Kaehler (hypersymplectic) is constructed. (author)

  12. Para-Hermitian and para-quaternionic manifolds

    Energy Technology Data Exchange (ETDEWEB)

    Ivanov, S [University of Sofia ' St. Kl. Ohridski' , Faculty of Mathematics and Informatics, Sofia (Bulgaria) and Abdus Salam International Centre for Theoretical Physics, Trieste (Italy); Zamkovoy, S [University of Sofia ' St. Kl. Ohridski' , Faculty of Mathematics and Informatics, Sofia (Bulgaria)

    2003-10-01

    A set of canonical para-Hermitian connections on an almost para-Hermitian manifold is defined. A Para-hermitian version of the Apostolov-Gauduchon generalization of the Goldberg-Sachs theorem in General Relativity is given. It is proved that the Nijenhuis tensor of a Nearly para-Kaehler manifolds is parallel with respect to the canonical connection. Salamon's twistor construction on quaternionic manifold is adapted to the para-quaternionic case. A locally conformally hyper-para-Kaehler (hypersymplectic) flat structure with parallel Lee form on the Kodaira-Thurston complex surfaces modeled on S{sup 1} x SL (2, R)-tilde is constructed. Anti-self-dual locally conformally hyper-para-Kaehler (hypersymplectic) neutral metrics with non vanishing Weyl tensor are obtained on the Inoe surfaces. An example of anti-self-dual neutral metric which is not locally conformally hyper-para-Kaehler (hypersymplectic) is constructed. (author)

  13. Molecular dynamics simulation of bovine pancreatic ribonuclease A-CpA and transition state-like complexes.

    Science.gov (United States)

    Formoso, Elena; Matxain, Jon M; Lopez, Xabier; York, Darrin M

    2010-06-03

    The mechanisms of enzymes are intimately connected with their overall structure and dynamics in solution. Experimentally, it is considerably challenging to provide detailed atomic level information about the conformational events that occur at different stages along the chemical reaction path. Here, theoretical tools may offer new potential insights that complement those obtained from experiments that may not yield an unambiguous mechanistic interpretation. In this study, we apply molecular dynamics simulations of bovine pancreatic ribonuclease A, an archetype ribonuclease, to study the conformational dynamics, structural relaxation, and differential solvation that occur at discrete stages of the transesterification and cleavage reaction. Simulations were performed with explicit solvation with rigorous electrostatics and utilize recently developed molecular mechanical force field parameters for transphosphorylation and hydrolysis transition state analogues. Herein, we present results for the enzyme complexed with the dinucleotide substrate cytidilyl-3',5'-adenosine (CpA) in the reactant, and transphosphorylation and hydrolysis transition states. A detailed analysis of active site structures and hydrogen-bond patterns is presented and compared. The integrity of the overall backbone structure is preserved in the simulations and supports a mechanism whereby His12 stabilizes accumulating negative charge at the transition states through hydrogen-bond donation to the nonbridge oxygens. Lys41 is shown to be highly versatile along the reaction coordinate and can aid in the stabilization of the dianionic transition state, while being poised to act as a general acid catalyst in the hydrolysis step.

  14. Hydrologic consistency as a basis for assessing complexity of monthly water balance models for the continental United States

    Science.gov (United States)

    Martinez, Guillermo F.; Gupta, Hoshin V.

    2011-12-01

    Methods to select parsimonious and hydrologically consistent model structures are useful for evaluating dominance of hydrologic processes and representativeness of data. While information criteria (appropriately constrained to obey underlying statistical assumptions) can provide a basis for evaluating appropriate model complexity, it is not sufficient to rely upon the principle of maximum likelihood (ML) alone. We suggest that one must also call upon a "principle of hydrologic consistency," meaning that selected ML structures and parameter estimates must be constrained (as well as possible) to reproduce desired hydrological characteristics of the processes under investigation. This argument is demonstrated in the context of evaluating the suitability of candidate model structures for lumped water balance modeling across the continental United States, using data from 307 snow-free catchments. The models are constrained to satisfy several tests of hydrologic consistency, a flow space transformation is used to ensure better consistency with underlying statistical assumptions, and information criteria are used to evaluate model complexity relative to the data. The results clearly demonstrate that the principle of consistency provides a sensible basis for guiding selection of model structures and indicate strong spatial persistence of certain model structures across the continental United States. Further work to untangle reasons for model structure predominance can help to relate conceptual model structures to physical characteristics of the catchments, facilitating the task of prediction in ungaged basins.

  15. State-of-the-art and main options to improve fuel-energy complex of ferrous metallurgy

    Energy Technology Data Exchange (ETDEWEB)

    Rozenblit, G I; Pashkov, V D; Romanov, G M

    1981-01-01

    In 1980, the State Institute for the Design and Planning Metallury (Gripromez), elaborated ''The main options of Fuel and energy resources conservation (FERG) in ferrous metallurgy of the USSR program of works for the period 1981-1985 and up to 1990''. The Gipromez technical committee recommended: 1) elaborating feasibility studies and reports, developing branch schemes and starting complexes to separate out FERC measures; 2) inclusion of the FERC measures at the starting complexes as the first stages of main projects construction; 3) that the Ministy of Ferrous Metallurgy of the USSR, general designers and enterprises reconsider the starting complexes of the projects constructed during the present five-year period and incorporate in them the urgent FERC actions on heat-utilizing facilities. Changing the steel smelting process structure through more extensive use of the converter process and installation of continuous blank casting allows achievement of considerable fuel conservation, some 4 m trf per year as compared with its consumption in the scheme of open-hearth furnace - blooming mill (slabbing mill). During the 11th five-year-plan period introduction of metallurgy plant. An installation with discharge of the converter gas without its afterburning and successive utilization as a fuel in the converter shop of the Novolipetsk is planned.

  16. Effect of carbazole-oxadiazole excited-state complexes on the efficiency of dye-doped light-emitting diodes

    Science.gov (United States)

    Jiang, Xuezhong; Register, Richard A.; Killeen, Kelly A.; Thompson, Mark E.; Pschenitzka, Florian; Hebner, Thomas R.; Sturm, James C.

    2002-05-01

    Interactions between hole-transporting carbazole groups and electron-transporting 1,3,4-oxadiazole groups were studied by photoluminescence and electroluminescence (EL) spectroscopy, in blends of poly(N-vinylcarbazole) with 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazole (PVK:PBD) and in random copolymers with carbazole and oxadiazole groups attached as side chains. Different excited-state complexes form in the blends, which exhibit exciplexes, and in the copolymers, which manifest electroplexes, due to topological constraints on the position of carbazole and oxadiazole units in the polymer. Both types of complex red-shift the EL spectra of the matrices compared with pure PVK homopolymer, although the shift is significantly greater for the electroplex. The presence of these complexes has a profound effect on the external quantum efficiency of dye-doped organic light-emitting diodes employing the blends or copolymers as matrices, as it strongly affects the efficiency of Förster energy transfer from the matrix to the dye. Single-layer devices doped with either coumarin 47 (C47), coumarin 6 (C6), or nile red (NR) were compared. Among the three dye-doped PVK:PBD devices, C6 doping yields the highest efficiency, while NR doping produced the most efficient copolymer devices, consistent with the degree of overlap between the EL spectrum of the matrix material and the absorption spectrum of the dye.

  17. Equações de chuvas intensas para o estado do Pará Intense rainfall equations for the state of Pará, Brazil

    Directory of Open Access Journals (Sweden)

    Rodrigo O. R. de M. Souza

    2012-09-01

    Full Text Available As equações de chuvas intensas têm sido usadas como ferramenta importante para o dimensionamento de obras hidráulicas. Devido à grande carência de informações relativas às equações de chuvas intensas, o presente trabalho teve como objetivo a obtenção das relações de intensidade, duração e frequência de precipitação pluvial para o Estado do Pará, utilizando-se a metodologia da desagregação da chuva de 24 h. Foram utilizadas séries históricas de dados pluviométricos de 74 cidades do Estado do Pará, obtidas no Sistema de Informações Hidrológicas da Agência Nacional de Águas-ANA. As equações de intensidade-duração-frequência foram devidamente ajustadas e apresentaram bom ajuste, com coeficientes de determinação acima de 0,99. A maioria das estações (51,4% apresentou intensidade de precipitação entre 90 e 110 mm h-1, para uma duração de chuva de 30 min e um tempo de retorno de 15 anos. Pode-se perceber uma concentração das maiores precipitações na região próxima ao litoral do nordeste paraense e no sudeste da Ilha do Marajó.The intense rainfall equations have been used as an important tool for design of hydraulic structures. Considering the lack of intense rainfall equations, this study aimed to determine the relations of intensity, duration and frequency of intense rainfall in the Pará State (Brazil, using the one-day rain disaggregation method. In this research rainfall data of 74 cities in the State of Pará were used, obtained from the Hydrological Information System of the National Water Agency-ANA. The equations of intensity-duration-frequency were adjusted and presented good adjustment with coefficients of determination above 0.99. Most stations (51.4% showed intensity of precipitation between 90 and 110 mm h-1 for duration of 30 min and rainfall return period of 15 years. The highest rainfall intensities were in the region near the northeast coast of Pará State and southeast of the Marajo

  18. Estimativa da evapotranspiração de referência em Campina Grande, Paraíba Estimate of reference evapotranspiration in the city of Campina Grande, Paraíba state, Brazil

    Directory of Open Access Journals (Sweden)

    Francisco de A. N. Henrique

    2007-12-01

    Full Text Available Deste trabalho se objetivou estimar, através de uma fórmula empírica, a evapotranspiração de referência diária no município de Campina Grande, PB (EToT, utilizando-se a amplitude térmica diária. Estimou-se, também, a ETo diária usando-se os métodos de FAO-Penman-Monteith (EToPM, Hargreaves (EToH e Linacre (EToL, sendo depois correlacionados com a EToT proposta na pesquisa, por estação do ano; para isto foram coletados valores diários das temperaturas, umidade relativa do ar, radiação solar, precipitação, pressão atmosférica e velocidade do vento a 2 m da Estação Meteorológica Automática, instalada na Universidade Federal de Campina Grande (UFCG, no período de 1 de janeiro a 31 de dezembro de 2004. Tais valores foram registrados no intervalo de 10 min. Verificou-se que as correlações da EToT com EToH, obtiveram o melhor ajuste, cujos coeficientes foram: R² = 0,7882 (no ano, R² = 0,9796 (no verão, R² = 0,8253 (no outono, R² = 0,878 (no inverno e R² = 0,914 (na primavera. Conclui-se que os métodos de EToPM e EToL não se ajustaram bem para Campina Grande, PB, o que evidencia que a EToT poderá ser utilizada na forma proposta para estimativa da ETo desta localidade. Das equações propostas, a única restrição é o EToT para o verão caso em que se recomenda o uso da equação anual.The objective of this study was to estimate, using an empiric formula, the daily reference evapotranspiration in the city of Campina Grande, Paraiba State, Brazil (EToT, using the daily thermal amplitude. The ETo was also estimated using the methods of FAO-Penman-Monteith (EToPM, Hargreaves (EToH and Linacre (EToL, being correlated later with EToT proposed in this research by season. For that, daily values of temperature, air relative humidity, solar radiation, precipitation, atmospheric pressure and wind speed at 2 m, were taken using the Automatic Meteorological Station installed in the Universidade Federal de Campina Grande (UFCG

  19. A prática de amamentar entre mulheres que exercem trabalho remunerado na Paraíba, Brasil: um estudo transversal Breastfeeding practices among paid working mothers in Paraíba State, Brazil: a cross-sectional study

    Directory of Open Access Journals (Sweden)

    Rodrigo Pinheiro de Toledo Vianna

    2007-10-01

    Full Text Available Estar no mercado de trabalho não deve impedir a mulher de amamentar. A Organização Mundial de Saúde preconiza o aleitamento materno exclusivo até seis meses de vida. No Brasil as leis propiciam à mulher trabalhadora quatro meses de licença maternidade, mas nem sempre ela recebe este benefício. Assim, como praticar amamentação exclusiva? Este artigo objetiva descrever as taxas de aleitamento materno e se o trabalho remunerado interfere na amamentação de mães da Paraíba. Trata-se de estudo transversal em 70 de 223 municípios que aceitaram participar da pesquisa na campanha de vacinação em 2002. Em 11.076 crianças menores de um ano, a prevalência de amamentação exclusiva foi de 22,4% de 0-4 meses e foi significativamente maior entre as mães que trabalhavam fora e que tiveram licença maternidade. Entre estas, foi também menor a prevalência de amamentação total e predominante. Na zona rural o trabalho fora de casa esteve associado com a redução do aleitamento materno exclusivo. A prática do amamentar na Paraíba está muito aquém das recomendações e o retorno precoce da mãe ao trabalho agrava esta situação.Paid work should not be an obstacle to women's breastfeeding. The World Health Organization (WHO recommends exclusive breastfeeding for 6 months. In Brazil, women are legally entitled to 4 months of maternity leave, but in practice few women enjoy such benefits. How is it possible to practice exclusive breastfeeding for 6 months? We analyzed both the breastfeeding rates and whether paid jobs interfere with breastfeeding in Paraíba State, Northeast Brazil. We conducted a cross-sectional study in 70 of 223 municipalities (counties during the annual immunization campaign in 2002. Among 11,076 infants (< 12 months of age, the exclusive breastfeeding rate at 0-4 months was 22.4% and was significantly higher among working women receiving maternity leave as compared to those who did not. The prevalence of total and

  20. Passagens para o Estado-nação: a tese de Costa Pinto Passages to the nation-state: the Costa Pinto's thesis

    Directory of Open Access Journals (Sweden)

    André Botelho

    2009-01-01

    Full Text Available O artigo discute uma pesquisa clássica da tradição sociológica brasileira: Lutas de famílias no Brasil (1949, de Luiz de Aguiar Costa Pinto. O objetivo principal é evidenciar e analisar sua significação teórica mais ampla para o entendimento da formação do Estado-nação no Brasil. Mostra como Lutas de famílias no Brasil contribui para desestabilizar a oposição dualista com que a relação entre público e privado vinha sendo interpretada no pensamento social brasileiro.The article discusses a classical research of Brazilian sociological tradition: Lutas de famílias no Brasil (1949, by Luiz de Aguiar Costa Pinto. The main objective is to demonstrate and analyze their theoretical meaning for understanding the formation of the Nation-state in Brazil. It shows how Costa Pinto's research contributes to destabilize the dualistic opposition between public and private on the Brazilian social thought.

  1. Sheep gastrointestinal helminthiasis in the Sertão region of Paraíba State, Northeastern Brazil: prevalence and risk factors.

    Science.gov (United States)

    Vieira, Vanessa Diniz; Vilela, Vinícius Longo Ribeiro; Feitosa, Thais Ferreira; Athayde, Ana Célia Rodrigues; Azevedo, Sérgio Santos; Souto, Diego Vagner de Oliveira; Silveira, Gian Libânio da; Melo, Lídio Ricardo Bezerra de

    2014-01-01

    In this study, we aimed to establish the prevalence and risk factors relating to gastrointestinal helminthiasis, and to characterize the sanitary management practiced among sheep herds in the Sertão region of the state of Paraíba, northeastern Brazil, based on factors that condition the ways of controlling these parasites in these herds. The research was carried out between April and July 2012. We visited 54 farms, where fecal and blood samples were individually collected from 465 animals. On each farm, a questionnaire was applied to gather information on variables relating to potential risk factors. The prevalence of sheep gastrointestinal helminthiasis in the region was 75.9%. At least one animal tested positive for this helminthiasis on 53 (98.1%) of the 54 farms evaluated. The eggs per gram of feces (EPG) analysis showed the following infection burdens: 51.8% with mild infection, 27.1% moderate infection, 9.9% heavy infection and 11.2% fatal infection. Among the sheep farms visited, anthelmintics were used on 81.5% (p helminthiasis, because the animals are more prone to reinfection. The Sertão region of Paraíba presents high prevalence of gastrointestinal helminthiasis among sheep, and the farm area is the most relevant risk factor for the development of these parasites.

  2. Complex forest dynamics indicate potential for slowing carbon accumulation in the southeastern United States.

    Science.gov (United States)

    Coulston, John W; Wear, David N; Vose, James M

    2015-01-23

    Over the past century forest regrowth in Europe and North America expanded forest carbon (C) sinks and offset C emissions but future C accumulation is uncertain. Policy makers need insights into forest C dynamics as they anticipate emissions futures and goals. We used land use and forest inventory data to estimate how forest C dynamics have changed in the southeastern United States and attribute changes to land use, management, and disturbance causes. From 2007-2012, forests yielded a net sink of C because of net land use change (+6.48 Tg C yr(-1)) and net biomass accumulation (+75.4 Tg C yr(-1)). Forests disturbed by weather, insect/disease, and fire show dampened yet positive forest C changes (+1.56, +1.4, +5.48 Tg C yr(-1), respectively). Forest cutting caused net decreases in C (-76.7 Tg C yr(-1)) but was offset by forest growth (+143.77 Tg C yr(-1)). Forest growth rates depend on age or stage of development and projected C stock changes indicate a gradual slowing of carbon accumulation with anticipated forest aging (a reduction of 9.5% over the next five years). Additionally, small shifts in land use transitions consistent with economic futures resulted in a 40.6% decrease in C accumulation.

  3. Dynamic translocation of ligand-complexed DNA through solid-state nanopores with optical tweezers

    International Nuclear Information System (INIS)

    Sischka, Andy; Spiering, Andre; Anselmetti, Dario; Khaksar, Maryam; Laxa, Miriam; Koenig, Janine; Dietz, Karl-Josef

    2010-01-01

    We investigated the threading and controlled translocation of individual lambda-DNA (λ-DNA) molecules through solid-state nanopores with piconewton force sensitivity, millisecond time resolution and picoampere ionic current sensitivity with a set-up combining quantitative 3D optical tweezers (OT) with electrophysiology. With our virtually interference-free OT set-up the binding of RecA and single peroxiredoxin protein molecules to λ-DNA was quantitatively investigated during dynamic translocation experiments where effective forces and respective ionic currents of the threaded DNA molecule through the nanopore were measured during inward and outward sliding. Membrane voltage-dependent experiments of reversible single protein/DNA translocation scans yield hysteresis-free, asymmetric single-molecule fingerprints in the measured force and conductance signals that can be attributed to the interplay of optical trap and electrostatic nanopore potentials. These experiments allow an exact localization of the bound protein along the DNA strand and open fascinating applications for label-free detection of DNA-binding ligands, where structural and positional binding phenomena can be investigated at a single-molecule level.

  4. State stiffness parameters of the vascular wall in hypertensive patients complex therapy cytoprotector and sartans

    Directory of Open Access Journals (Sweden)

    V. P. Mikhin

    2015-01-01

    Full Text Available A randomized study of the state of stiffness parameters arteries wall (CAVI — cardio-ankle vascular index, AI (augmentation index PEP (duration of the voltage of the left ventricle using «VaSera-1000» («Fukuda Denshi», Japan in primary hypertension patients (80 not treated with systemic antihypertensive therapy. The effect of long-term (3 months was be marketed. Losartan combined with Mexicor 300mg/day or mildronate 1000 mg/day for the specified parameters. It sets the initial reduction the properties of the arterial wall in patients with hypertension, in contrast to healthy individuals. Mexicor or mildronat accompanied by improvement east-cal properties of the arterial wall, reducing CAVI and AI in 3 months on 9.4% and 8.9%, 14.9% and 15.4%, respectively. In the control group-term change CAVI and AI no. Mexicor led to a more pronounced increase in PEP, than mildronate, respectively, on 23.7% and 18.9%. Losartan monotherapy results in a less pronounced decrease in the stiffness of the vessel wall.

  5. A new method to study complex materials in solid state chemistry: application to chalcogenide materials

    International Nuclear Information System (INIS)

    Lippens, P.E.; Olivier-Fourcade, J.; Jumas, J.C.

    1998-01-01

    We show that a combined application of Moessbauer spectroscopy and other experimental tools such as X-ray photoelectron spectroscopy, X-ray absorption spectroscopy and nuclear magnetic resonance provides a coherent picture of the local electronic structure in chalcogenide materials. In order to develop this idea we propose an analysis of the Sn, Sb and Te local electronic structures for three different systems of materials. The first example concerns the In-Sn-S system. We show that Li insertion in In 16 Sn 4 S 32 leads to changes of the Sn oxidation states from Sn(IV) to Sn(II). The second example concerns materials of the Tl-Sb-S system. We show that variations of the 121 Sb Moessbauer isomer shift and surface of the first peak of the X-ray absorption spectra at the Sb L III edge can be linearly correlated because of the main influence of the Sb 5s electrons. This is explained by changes in the local environment of the Sb atoms. The last example concerns the crystalline phases of the Tl-Sn-Te system. The formal oxidation numbers of the Te atoms are determined from 125 Te Moessbauer spectroscopy and X-ray photoelectron spectroscopy. They are related to the different types of bonds involving the Te atoms in the Tl-Sn-Te compounds

  6. A biogeochemical and isotopic view of Nitrogen and Carbon in rivers of the Alto Paraíba do Sul basin, São Paulo State, Brazil

    Science.gov (United States)

    Ravagnani, E. D. C.; Coletta, L. D.; Lins, S. R. M.; Antonio, J.; Mazzi, E. A.; Rossete, A. L. M.; Andrade, T. M. B.; Martinelli, L. A.

    2014-12-01

    The magnitude of potential flows of elements in tropical ecosystems is not well represented in the literature, even being very important. The Paraíba do Sul River drains the three more economically developed states in Brazil: São Paulo, Minas Gerais and Rio de Janeiro and its basin is considered extremely altered. Despite its economic and social importance (~ 5.3 mi inhabitants), we don't know much about carbon and nitrogen transport into its rivers and how these are affected by soil use changes. This work aimed to investigate these nutrients, using an isotopic and a biogeochemical approach, at some third order (Paraibuna, Paraitinga and Paraíba do Sul), second and first order rivers, all inserted at the Alto Paraíba do Sul Basin. In general, the low dissolved organic carbon, dissolved inorganic carbon, total dissolved nitrogen and inorganic N concentrations found in the first order rivers, showed the lower variation, despite changes in the soil use. Forested rivers presented higher DOC (3.3 mg.L-1) and TDN (14.2 mM) concentrations than the pasture rivers (2.6 mg.L-1 and 13.8 mM), while these presented higher DIC concentrations than those ones (90.2 mM and 71.2 mM). In third order rivers, the concentrations were also very low. Both carbon and nitrogen contents at the fine and coarse fractions of the suspended particulate material (SPM) were lower at Paraitinga and Paraiba do Sul Rivers. At the Paraibuna River, the fine fraction of SPM presented 25% of C concentration. The concentrations found at the coarse fraction were also higher at this river. The N concentrations were higher at the fine fraction and, consequently, this fraction presented higher C:N ratio. These observations allow us to say that the coarse fraction might be related to plant material, while the fine fraction is probably related to the soils. The δ13C in the SPM was lower in the Paraibuna River, probably due to the predominance of forest, while in the other ones pasture was the main soil use

  7. Complex step-based low-rank extended Kalman filtering for state-parameter estimation in subsurface transport models

    KAUST Repository

    El Gharamti, Mohamad; Hoteit, Ibrahim

    2014-01-01

    The accuracy of groundwater flow and transport model predictions highly depends on our knowledge of subsurface physical parameters. Assimilation of contaminant concentration data from shallow dug wells could help improving model behavior, eventually resulting in better forecasts. In this paper, we propose a joint state-parameter estimation scheme which efficiently integrates a low-rank extended Kalman filtering technique, namely the Singular Evolutive Extended Kalman (SEEK) filter, with the prominent complex-step method (CSM). The SEEK filter avoids the prohibitive computational burden of the Extended Kalman filter by updating the forecast along the directions of error growth only, called filter correction directions. CSM is used within the SEEK filter to efficiently compute model derivatives with respect to the state and parameters along the filter correction directions. CSM is derived using complex Taylor expansion and is second order accurate. It is proven to guarantee accurate gradient computations with zero numerical round-off errors, but requires complexifying the numerical code. We perform twin-experiments to test the performance of the CSM-based SEEK for estimating the state and parameters of a subsurface contaminant transport model. We compare the efficiency and the accuracy of the proposed scheme with two standard finite difference-based SEEK filters as well as with the ensemble Kalman filter (EnKF). Assimilation results suggest that the use of the CSM in the context of the SEEK filter may provide up to 80% more accurate solutions when compared to standard finite difference schemes and is competitive with the EnKF, even providing more accurate results in certain situations. We analyze the results based on two different observation strategies. We also discuss the complexification of the numerical code and show that this could be efficiently implemented in the context of subsurface flow models. © 2013 Elsevier B.V.

  8. Complex step-based low-rank extended Kalman filtering for state-parameter estimation in subsurface transport models

    KAUST Repository

    El Gharamti, Mohamad

    2014-02-01

    The accuracy of groundwater flow and transport model predictions highly depends on our knowledge of subsurface physical parameters. Assimilation of contaminant concentration data from shallow dug wells could help improving model behavior, eventually resulting in better forecasts. In this paper, we propose a joint state-parameter estimation scheme which efficiently integrates a low-rank extended Kalman filtering technique, namely the Singular Evolutive Extended Kalman (SEEK) filter, with the prominent complex-step method (CSM). The SEEK filter avoids the prohibitive computational burden of the Extended Kalman filter by updating the forecast along the directions of error growth only, called filter correction directions. CSM is used within the SEEK filter to efficiently compute model derivatives with respect to the state and parameters along the filter correction directions. CSM is derived using complex Taylor expansion and is second order accurate. It is proven to guarantee accurate gradient computations with zero numerical round-off errors, but requires complexifying the numerical code. We perform twin-experiments to test the performance of the CSM-based SEEK for estimating the state and parameters of a subsurface contaminant transport model. We compare the efficiency and the accuracy of the proposed scheme with two standard finite difference-based SEEK filters as well as with the ensemble Kalman filter (EnKF). Assimilation results suggest that the use of the CSM in the context of the SEEK filter may provide up to 80% more accurate solutions when compared to standard finite difference schemes and is competitive with the EnKF, even providing more accurate results in certain situations. We analyze the results based on two different observation strategies. We also discuss the complexification of the numerical code and show that this could be efficiently implemented in the context of subsurface flow models. © 2013 Elsevier B.V.

  9. Compact state-space models for complex superconducting radio-frequency structures based on model order reduction and concatenation methods

    International Nuclear Information System (INIS)

    Flisgen, Thomas

    2015-01-01

    The modeling of large chains of superconducting cavities with couplers is a challenging task in computational electrical engineering. The direct numerical treatment of these structures can easily lead to problems with more than ten million degrees of freedom. Problems of this complexity are typically solved with the help of parallel programs running on supercomputing infrastructures. However, these infrastructures are expensive to purchase, to operate, and to maintain. The aim of this thesis is to introduce and to validate an approach which allows for modeling large structures on a standard workstation. The novel technique is called State-Space Concatenations and is based on the decomposition of the complete structure into individual segments. The radio-frequency properties of the generated segments are described by a set of state-space equations which either emerge from analytical considerations or from numerical discretization schemes. The model order of these equations is reduced using dedicated model order reduction techniques. In a final step, the reduced-order state-space models of the segments are concatenated in accordance with the topology of the complete structure. The concatenation is based on algebraic continuity constraints of electric and magnetic fields on the decomposition planes and results in a compact state-space system of the complete radio-frequency structure. Compared to the original problem, the number of degrees of freedom is drastically reduced, i.e. a problem with more than ten million degrees of freedom can be reduced on a standard workstation to a problem with less than one thousand degrees of freedom. The final state-space system allows for determining frequency-domain transfer functions, field distributions, resonances, and quality factors of the complete structure in a convenient manner. This thesis presents the theory of the state-space concatenation approach and discusses several validation and application examples. The examples

  10. Registros nuevos de murciélagos para el estado de Hidalgo, México New records of bats for the state of Hidalgo, Mexico

    Directory of Open Access Journals (Sweden)

    Melany Aguilar-López

    2012-12-01

    Full Text Available Este trabajo registra por primera vez la presencia de los murciélagos Eptesicus furinalis, Glossophaga morenoi, Myotis auriculus y Platyrrhinus helleri para el estado de Hidalgo, México. Los ejemplares se obtuvieron durante los muestreos realizados entre agosto de 2008 y mayo de 2010. De cada ejemplar se proporcionan las medidas externas y craneales, la condición reproductora, así como el tipo de vegetación donde fueron encontrados.We register for the first time the presence of the bats Eptesicus furinalis, Glossophaga morenoi, Myotis auriculus and Platyrrhinus helleri for the state of Hidalgo, Mexico. The bats were obtained between August 2008 and May 2010. We provide for each bat external and cranial measures, reproductive status, as well as the type of vegetation where they were found.

  11. From ground state to fission fragments: A complex, multi-dimensional multi-path problem

    International Nuclear Information System (INIS)

    Moeller, P.; Nix, J.R.; Swiatecki, W.J.

    1992-01-01

    Experimental results on the fission properties of nuclei close to 264 Fm show sudden and large changes with a change of only one or two neutrons or protons. The nucleus 258 Fm, for instance, undergoes symmetric fission with a half-life of about 0.4 ms and a kinetic-energy distribution peaked at about 235 MeV whereas 256 Fm undergoes asymmetric fission with a half-life of about 3 h and a kinetic-energy distribution peaked at about 200 MeV. Qualitatively, these sudden changes have been postulated to be due to the emergence of fragment shells in symmetric-fission products close to 132 Sn. Here we present a quantitative calculation that shows where high-kinetic-energy symmetric fusion occurs and why it is associated with a sudden and large decrease in fission half-lives. We base our study on calculations of potential-energy surfaces in the macroscopic-microscopic model and a semi-empirical model for the nuclear inertia. We use the three-quadratic-surface parameterization to generate the shapes for which the potential-energy surfaces are calculated. The use of this parameterization and the use of the finite-range macroscopic model allows for the study of two touching spheres and similar shapes. Since these shapes are thought to correspond to the scission shapes for the high-kinetic-energy events it is of crucial importance that a continuous sequence of shapes leading from the nuclear ground state to these configurations can be studied within the framework of the model. We present the results of the calculations in terms of potential-energy surfaces and fission half-lives for heavy even nuclei. The surfaces are displayed in the form of contour diagrams as functions of two moments of the shape. They clearly show the appearance of a second fission valley, which leads to scission configurations close to tow touching spheres, for fissioning systems in the vicinity of 264 Fm

  12. Insegurança alimentar das famílias residentes em municípios do interior do estado da Paraíba, Brasil Household food insecurity in municipalities of the Paraíba State, Brazil

    Directory of Open Access Journals (Sweden)

    Rodrigo Pinheiro de Toledo Vianna

    2008-08-01

    Full Text Available OBJETIVO: Identificar a prevalência de segurança alimentar e dos diferentes graus de insegurança alimentar entre famílias residentes em 14 municípios da Paraíba e a relacionar com o perfil social, demográfico e econômico destas famílias. MÉTODOS: Realizou-se inquérito populacional no qual 4.533 famílias foram entrevistadas. Utilizou-se questionário para avaliar as características sócio-demográficas, juntamente com a Escala Brasileira de Insegurança Alimentar. Foram calculadas medidas de prevalência e verificada a associação entre as variáveis do estudo pelo teste qui-quadrado. Ajustou-se um modelo de regressão logística para examinar a associação dos fatores de risco à segurança e à insegurança alimentar. RESULTADOS: Observou-se prevalência de 11,3% de insegurança alimentar grave, 17,6% de insegurança moderada, 23,6% de insegurança leve; 47,5% da população foi classificada em situação de segurança alimentar. As áreas rurais apresentaram pior situação. O principal motivo referido para insegurança alimentar foi a falta de dinheiro para aquisição de comida. A regressão logística final foi composta por três variáveis: baixa renda familiar per capita (R$25,00 versus R$300,00, Odds Ratio=19,10, moradia precária (Odds Ratio=1,98 e falta de água permanente (Odds Ratio=1,38. As famílias do menor estrato de renda apresentaram menor prevalência de insegurança alimentar grave, quando incluídas em programas sociais. CONCLUSÃO: A prevalência de insegurança alimentar foi elevada. O instrumento utilizado demonstrou ser uma ferramenta importante de avaliação da situação de segurança alimentar e útil para o monitoramento de políticas públicas, como é o caso dos programas sociais que integram a estratégia Fome Zero do Governo Federal.OBJECTIVE: The objective of this study was to identify the prevalence of household food security in 14 municipalities of Paraiba State and examine its association with

  13. Observation of the long-lived triplet excited state of perylenebisimide (PBI) in C^N cyclometalated Ir(III) complexes and application in photocatalytic oxidation.

    Science.gov (United States)

    Sun, Jifu; Zhong, Fangfang; Zhao, Jianzhang

    2013-07-14

    Perylenebisimide (PBI) was used to prepare C^N cyclometalated Ir(III) complexes that show strong absorption of visible light and it is the first time the long-lived triplet excited state of PBI chromophore was observed in a transition metal complex (τT = 22.3 μs). Previously, the lifetime of the triplet state of PBI in transition metal complexes was usually shorter than 1.0 μs. Long-lived triplet excited states are useful for applications in photocatalysis or other photophysical processes concerning triplet-triplet-energy-transfer. PBI and amino-PBI were used for preparation of cyclometalated Ir(III) complexes (Ir-2 and Ir-3), in which the PBI chromophore was connected to the coordination center via C≡C π-conjugation bond. The new complexes show strong absorption in visible region (ε = 34,200 M(-1) cm(-1) at 541 nm for Ir-2, and ε = 19,000 at 669 nm for Ir-3), compared to the model complex Ir(ppy)(bpy)[PF6] Ir-1 (ε PBI-localized long-lived (3)IL states were populated for Ir-2 and Ir-3 upon photoexcitation. The complexes were used as triplet photosensitizers for (1)O2-mediated photooxidation of 1,5-dihydronaphthalene to produce juglone, an important intermediate for preparation of anti-cancer compounds. (1)O2 quantum yields (Φ(Δ)) up to 91% were observed for the new Ir(III) complexes and the overall photosensitizing ability is much higher than the conventional Ir(III) complex Ir-1, which shows the typical weak visible light absorption in visible region. Our results are useful for preparation of transition metal complexes that show strong absorption of visible light and long-lived triplet excited state and for the application of these complexes in photocatalysis.

  14. The unsustainability of the implantation of the 'Luz para todos' programme in the Amazonas state; A (in)sustentabilidade da implantacao do programa Luz para Todos no estado do Amazonas

    Energy Technology Data Exchange (ETDEWEB)

    Cavalcante, Andreia Santos; Cartaxo, Elizabeth Ferreira [Universidade Federal do Amazonas (UFAM), Manaus, AM (Brazil)

    2008-07-01

    This article brings to discuss the policy of universalization of the supply of electrical energy 'Luz para todos' showing the significance of this proposal of the government, in a short time, bring electricity to more than 10 million people who still live in the darkness. It features the efficiency of this action of the government from the reality experienced in the context Amazon, which show a framework for various characteristics and natural, cultural and focused on the issue geospatial. This involves understanding the multitude of climates and geographical characteristics, cultural and social constitute major obstacles for the implementation of policies homogeneous, demonstrating that the potential for development of each region has different dynamics, which should influence in the formulation of policies. While electricity is essential for the economic progress of a country, the expansion of its services to society must be viewed with great discretion, in order to prevent the exploitation and consumption exacerbated of natural resources and waste of energy. With this reading, the work he proposes to show the inconsistencies of the program in the state of Amazonas, on presentation of data from the Companhia Energetica do Amazonas (CEAM), showing thus obstacles to the achievement of the goals outlined in the State. Considering the environmental importance that the Amazon represents for Brazil and for the world, emerges is the need for a differentiated look for the region, taking into account their unique reality. It is believed that is the acceptance of their characteristics that we can really promote a development that is sustainable for the Amazon. (author)

  15. Genetic variation in populations of Culicoides variipennis complex in the six New England states, U.S.A.

    Science.gov (United States)

    Holbrook, F R; Tabachnick, W J; Brady, R

    1996-04-01

    We investigated the identity and distribution of members of the Culicoides variipennis complex in the six New England states of the U.S.A., a region where bluetongue transmission has not been detected. Analyses of seven polymorphic isozyme-encoding loci showed that only C.v.variipennis, not considered to be a vector of the bluetongue viruses, was present. The populations of C.v.variipennis were significantly more hetero-zygous than C.v.sonorensis and C.v.occidentalis populations from similar studies in the state of California. Estimates of genetic diversity among populations of C.v.variipennis in New England were similar to C.v.sonorensis in the state of Colorado, but were significantly more genetically divergent than California populations of C.v.occidentalis. The impact of these findings on the status of New England as a possible bluetongue-free region for the purpose of international trade in ruminant livestock and their germplasm is discussed.

  16. The study of the functional state of the endothelium via a complex of markers with reactive hyperemia

    Directory of Open Access Journals (Sweden)

    Berezhniy V.

    2016-03-01

    Full Text Available Diagnosis of endothelial dysfunction is a key point in the prevention and treatment of cardiovascular diseases. In scientific research the study of the state of the endothelium used test with reactive hyperemia of brachial artery wich present as the value of endothelium dependent and independent artery dilatation. However, the disadvantage of this marker is ignoring the size of arteries, well know that small arteries has a greater degree of dilation more than big arterias, this fact making difficult to compare results between different patients. The aim of our study was to examine the state of endothelium using a complex of markers, compare them informative in children with JRA who are at risk for the development of endothelial dysfunction. Materials and Methods. The study was included 40 children with juvenile rheumatoid arthritis who were treated at the department of children's cardiorheumatology Kyiv City Children's Hospital #1 and Kiev Regional Hospital m. Boyarka. Results. The study found a development of endothelial dysfunction changes in endothelium dependent vasodilation, reactive hyperemia and coefficient of vasodilation. Simultaneous marked change of endothelium vasodilation of the brachial artery and coefficient of vasodilatation. There were no pathological changes in endothelial shear stress in patients compared with healthy children. Conclusions. Evaluate the state of the endothelium is necessary with the help of a set of indicators (RH, EDVD, VC that will help to avoid diagnostic mistakes during the test with the reactive hyperemia.

  17. Communication: Evaluating non-empirical double hybrid functionals for spin-state energetics in transition-metal complexes

    Science.gov (United States)

    Wilbraham, Liam; Adamo, Carlo; Ciofini, Ilaria

    2018-01-01

    The computationally assisted, accelerated design of inorganic functional materials often relies on the ability of a given electronic structure method to return the correct electronic ground state of the material in question. Outlining difficulties with current density functionals and wave function-based approaches, we highlight why double hybrid density functionals represent promising candidates for this purpose. In turn, we show that PBE0-DH (and PBE-QIDH) offers a significant improvement over its hybrid parent functional PBE0 [as well as B3LYP* and coupled cluster singles and doubles with perturbative triples (CCSD(T))] when computing spin-state splitting energies, using high-level diffusion Monte Carlo calculations as a reference. We refer to the opposing influence of Hartree-Fock (HF) exchange and MP2, which permits higher levels of HF exchange and a concomitant reduction in electronic density error, as the reason for the improved performance of double-hybrid functionals relative to hybrid functionals. Additionally, using 16 transition metal (Fe and Co) complexes, we show that low-spin states are stabilised by increasing contributions from MP2 within the double hybrid formulation. Furthermore, this stabilisation effect is more prominent for high field strength ligands than low field strength ligands.

  18. pH-Dependent spin state population and 19F NMR chemical shift via remote ligand protonation in an iron(ii) complex.

    Science.gov (United States)

    Gaudette, Alexandra I; Thorarinsdottir, Agnes E; Harris, T David

    2017-11-30

    An Fe II complex that features a pH-dependent spin state population, by virtue of a variable ligand protonation state, is described. This behavior leads to a highly pH-dependent 19 F NMR chemical shift with a sensitivity of 13.9(5) ppm per pH unit at 37 °C, thereby demonstrating the potential utility of the complex as a 19 F chemical shift-based pH sensor.

  19. Spin state of mixed crystals of iron with zinc or cobalt for the assembled complexes bridged by 1,3-bis(4-pyridyl)propanes

    International Nuclear Information System (INIS)

    Nakashima, S; Dote, T; Atsuchi, M; Inoue, K

    2010-01-01

    Mixed crystals, [Fe 1-x M x (NCX) 2 (bpp) 2 ] (M=Zn, Co; X=S, Se; bpp1,3-bis(4-pyridyl)propane), had a similar structure with 2D interpenetrated structure of [Fe(NCX) 2 (bpp) 2 ]. The proportion of Fe II low-spin state in the mixed crystals of NCSe complex increased compared with that of the corresponding Fe complex, while such change in the Moessbauer spectra was not observed in the NCS complex.

  20. The Complex Spin State of 103P-Hartley 2: Kinematics and Orientation in Space

    Science.gov (United States)

    Belton, Michael J. S.; Thomas, Peter; Li, Jian-Yang; Williams, Jade; Carcich, Brian; A'Hearn, Michael F.; McLaughlin, Stephanie; Farnham, Tony; McFadden, Lucy; Lisse, Carey M.; hide

    2013-01-01

    We derive the spin state of the nucleus of Comet 103P/Hartley 2, its orientation in space, and its short-term temporal evolution from a mixture of observations taken from the DIXI (Deep Impact Extended Investigation) spacecraft and radar observations. The nucleus is found to spin in an excited long-axis mode (LAM) with its rotational angular momentum per unit mass, M, and rotational energy per unit mass, E, slowly decreasing while the degree of excitation in the spin increases through perihelion passage. M is directed toward (RA, Dec; J2000) = 8+/-+/- 4 deg., 54 +/- 1 deg. (obliquity = 48 +/- 1 deg.). This direction is likely changing, but the change is probably <6 deg. on the sky over the approx. 81.6 days of the DIXI encounter. The magnitudes of M and E at closest approach (JD 2455505.0831866 2011-11-04 13:59:47.310) are 30.0 +/- 0.2 sq. m/s and (1.56 +/- 0.02) X 10(exp -3) sq. m /sq. s respectively. The period of rotation about the instantaneous spin vector, which points in the direction (RA, Dec; J2000) = 300 +/- 3.2deg., 67 +/- 1.3 deg. at the time of closest approach, was 14.1 +/- 0.3 h. The instantaneous spin vector circulates around M, inclined at an average angle of 33.2 +/- 1.3 deg. with an average period of 18.40 +/- 0.13 h at the time of closest approach. The period of roll around the principal axis of minimum inertia (''long'' axis) at that time is 26.72 +/- 0.06 h. The long axis is inclined to M by approx. 81.2 +/- 0.6 deg. on average, slowly decreasing through encounter. We infer that there is a periodic nodding motion of the long axis with half the roll period, i.e., 13.36+/- 0.03 h, with amplitude of 1 again decreasing through encounter. The periodic variability in the circulation and roll rates during a cycle was at the 2% and 10-14% level respectively. During the encounter there was a secular lengthening of the circulation period of the long axis by 1.3 +/- 0.2 min/d, in agreement with ground-based estimates, while the period of roll around the

  1. Limitações nutricionais para o cultivo de açaizeiro em latossolo amarelo textura média, Estado do Pará Nutritional limitations for Euterpe oleracea in yellow latosol of Para State - Brazil

    Directory of Open Access Journals (Sweden)

    Ismael de Jesus Matos Viégas

    2004-08-01

    Full Text Available A região amazônica apresenta condições edafoclimáticas favoráveis ao desenvolvimento de sistemas de cultivos utilizando fruteiras tropicais. O açaizeiro (Euterpe oleracea, Mart. desponta como uma das espécies de grande importância econômica para a fruticultura regional. A produção de fruteiras ainda é limitada pela carência de conhecimentos sobre diversos segmentos dos sistemas de produção, especialmente com relação a estudos sobre nutrição mineral de plantas. Dessa forma, em amostras superficiais de até 30 cm de profundidade de Latossolo Amarelo textura média do Município de Belém, Estado do Pará, conduziu-se experimento, em casa de vegetação, com plantas de açaizeiro, com o objetivo de identificar os nutrientes limitantes ao seu desenvolvimento, mediante a técnica do elemento faltante. O delineamento experimental foi inteiramente ao acaso, com quatro repetições e 14 tratamentos: completo (calagem, macro e micronutrientes, NPK; omissão de N; de P; de K; de Ca; de Mg; de S; de B; de Cu; de Fe; de Mn; de Mo e de Zn. Os resultados obtidos neste trabalho permitiram concluir que os macronutrientes mais limitantes para o crescimento de açaizeiros, em Latossolo Amarelo textura média, foram o fósforo, o nitrogênio, o potássio e o magnésio e entre os micronutrientes, o manganês.Aiming to study the nutritional limitation of macronutrients and micronutrients in açaizeiro plants (Euterpe oleracea Mart. in Yellow Latosol from the city of Belém, state of Pará - Brazil, this work was carried out under greenhouse conditions at Embrapa Amazonian Oriental. In this experiment it was used the missing element technique and the experimental design was a randomized block with four repetitions and fourteen treatments: Complete (liming, macro and micronutrients, NPK, omission of N; P; K; Ca; Mg; S; B; Cu; Fe; Mn; Mo and Zn. The results allowed to conclude that the macronutrients more limitant to growth of Euterpe oleracea, were

  2. Characterizing highly dynamic conformational states: The transcription bubble in RNAP-promoter open complex as an example

    Science.gov (United States)

    Lerner, Eitan; Ingargiola, Antonino; Weiss, Shimon

    2018-03-01

    Bio-macromolecules carry out complicated functions through structural changes. To understand their mechanism of action, the structure of each step has to be characterized. While classical structural biology techniques allow the characterization of a few "structural snapshots" along the enzymatic cycle (usually of stable conformations), they do not cover all (and often fast interconverting) structures in the ensemble, where each may play an important functional role. Recently, several groups have demonstrated that structures of different conformations in solution could be solved by measuring multiple distances between different pairs of residues using single-molecule Förster resonance energy transfer (smFRET) and using them as constrains for hybrid/integrative structural modeling. However, this approach is limited in cases where the conformational dynamics is faster than the technique's temporal resolution. In this study, we combine existing tools that elucidate sub-millisecond conformational dynamics together with hybrid/integrative structural modeling to study the conformational states of the transcription bubble in the bacterial RNA polymerase-promoter open complex (RPo). We measured microsecond alternating laser excitation-smFRET of differently labeled lacCONS promoter dsDNA constructs. We used a combination of burst variance analysis, photon-by-photon hidden Markov modeling, and the FRET-restrained positioning and screening approach to identify two conformational states for RPo. The experimentally derived distances of one conformational state match the known crystal structure of bacterial RPo. The experimentally derived distances of the other conformational state have characteristics of a scrunched RPo. These findings support the hypothesis that sub-millisecond dynamics in the transcription bubble are responsible for transcription start site selection.

  3. Ultrafast excited-state relaxation of a binuclear Ag(i) phosphine complex in gas phase and solution.

    Science.gov (United States)

    Kruppa, S V; Bäppler, F; Klopper, W; Walg, S P; Thiel, W R; Diller, R; Riehn, C

    2017-08-30

    The binuclear complex [Ag 2 (dcpm) 2 ](PF 6 ) 2 (dcpm = bis(dicyclohexylphosphino)methane) exhibits a structure with a close silver-silver contact mediated by the bridging ligand and thus a weak argentophilic interaction. Upon electronic excitation this cooperative effect is strongly increased and determines the optical and luminescence properties of the compound. We have studied here the ultrafast electronic dynamics in parallel in gas phase by transient photodissociation and in solution by transient absorption. In particular, we report the diverse photofragmentation pathways of isolated [Ag 2 (dcpm) 2 ] 2+ in an ion trap and its gas phase UV photodissociation spectrum. By pump-probe fragmentation action spectroscopy (λ ex = 260 nm) in the gas phase, we have obtained fragment-specific transients which exhibit a common ultrafast multiexponential decay. This is fitted to four time constants (0.6/5.8/100/>1000 ps), highlighting complex intrinsic photophysical processes. Remarkably, multiexponential dynamics (0.9/8.5/73/604 ps) are as well found for the relaxation dynamics in acetonitrile solution. Ab initio calculations at the level of approximate coupled-cluster singles-doubles (CC2) theory of ground and electronically excited states of the reduced model system [Ag 2 (dmpm) 2 ] 2+ (dmpm = bis(dimethylphosphino)methane) indicate a shortening of the Ag-Ag distance upon excitation by 0.3-0.4 Å. In C 2 geometry two close-lying singlet states S 1 ( 1 MC(dσ*-pπ), 1 B, 4.13 eV) and S 2 ( 1 MC(dσ*-pσ), 1 A, 4.45 eV) are found. The nearly dark S 1 state has not been reported so far. The excitation of the S 2 state carries a large oscillator strength for the calculated vertical transition (266 nm). Two related triplets are calculated at T 1 (3.87 eV) and T 2 (3.90 eV). From these findings we suggest possible relaxation pathways with the two short time constants ascribed to ISC/IVR and propose from the obtained similar values in gas phase that the fast solution dynamics

  4. Epidemiology of snakebite accidents in the municipalities of the state of Paraíba, Brazil Epidemiologia dos acidentes ofídicos ocorridos nos municípios do Estado da Paraíba, Brasil

    Directory of Open Access Journals (Sweden)

    Rafaella Moreno Barros

    2013-05-01

    Full Text Available Accidents involving venomous animals represent an important, albeit neglected, public health issue worldwide. A descriptive study was made of snakebite cases attended and recorded between 2007 and 2010 in the health units of the municipalities of Cariri, State of Paraíba, northeastern Brazil. Data was collected from the Injury Notification Information System data banks of the Health Ministry and a total of 351 records of snakebite victims were reviewed. Victims were predominantly male farm workers over 50. The highest incidence of snakebites occurred in rural areas, between April and June of 2007 and 2010. Snakes of the genus Bothrops were responsible for most cases, and victims were mostly bitten on the feet. The majority of the victims received medical assistance within 1 to 3 hours after being bitten. The most common clinical manifestations were pain, edema and ecchymosis, which were mainly classified as mild or moderate. Two deaths were reported. It was concluded that there is a significant impact of seasonality in snakebites, the prevalence of attacks caused by Bothrops, affecting the lower limbs of adult male farmers in rural areas. The findings of this study may contribute to identify the conditions that increase the risk of snake attacks in the northeastern region.Acidentes por animais peçonhentos representam um importante, embora negligenciado, problema de saúde pública mundial. Neste sentido, foi realizado um estudo descritivo dos acidentes ofídicos atendidos e registrados, entre 2007 e 2010, nas unidades de saúde dos municípios do Cariri, Estado da Paraíba, Nordeste do Brasil. As informações foram coletadas do banco de dados do Sistema de Informação de Agravos de Notificação do Ministério da Saúde. Um total de 351 registros de vítimas de ataques por serpentes peçonhentas foram analisados. As vítimas foram predominantemente trabalhadores rurais do sexo masculino com mais de 50 anos. As maiores incidências de

  5. Occurrence of new species of mealybug on cotton fields in the states of Bahia and Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Carlos Alberto Domingues da Silva

    2012-01-01

    Full Text Available The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae has been reported occurring in several countries causing severe losses in economically important crops, including cotton. Based on information reported by farmers in the regions of the Southwest and Middle São Francisco, Bahia and also in the regions of the Agreste and Semi-arid of the Paraiba State, high infestations of cotton mealybugs have occurred in these regions during the cotton season of 2007 and 2008. The cotton mealybug was identified as P. solenopsis and this represents the first record of this insect attacking cotton in Brazil.

  6. Application of the cubic-plus-association (CPA) equation of state to complex mixtures with aromatic hydrocarbons

    DEFF Research Database (Denmark)

    Folas, Georgios; Kontogeorgis, Georgios; Michelsen, Michael Locht

    2006-01-01

    The cubic-plus-association (CPA) equation of state is applied to phase equilibria of mixtures containing alcohols, glycols, water, and aromatic or olefinic hydrocarbons. Previously, CPA has been successfully used for mixtures containing various associating compounds (alcohols, glycols, amines......, organic acids, and water) and aliphatic hydrocarbons. We show in this work that the model can be satisfactorily extended to complex vapor-liquid-liquid equilibria with aromatic or olefinic hydrocarbons. The solvation between aromatics/olefinics and polar compounds is accounted for. This is particularly...... important for mixtures containing water and glycols, but less so for mixtures with alcohols. For water/hydrocarbons, a single binary interaction parameter which accounts for the solvation is fitted to the experimental liquid-liquid equilibria (LLE) data. The interaction parameter of the physical term...

  7. Complex-envelope alternating-direction-implicit FDTD method for simulating active photonic devices with semiconductor/solid-state media.

    Science.gov (United States)

    Singh, Gurpreet; Ravi, Koustuban; Wang, Qian; Ho, Seng-Tiong

    2012-06-15

    A complex-envelope (CE) alternating-direction-implicit (ADI) finite-difference time-domain (FDTD) approach to treat light-matter interaction self-consistently with electromagnetic field evolution for efficient simulations of active photonic devices is presented for the first time (to our best knowledge). The active medium (AM) is modeled using an efficient multilevel system of carrier rate equations to yield the correct carrier distributions, suitable for modeling semiconductor/solid-state media accurately. To include the AM in the CE-ADI-FDTD method, a first-order differential system involving CE fields in the AM is first set up. The system matrix that includes AM parameters is then split into two time-dependent submatrices that are then used in an efficient ADI splitting formula. The proposed CE-ADI-FDTD approach with AM takes 22% of the time as the approach of the corresponding explicit FDTD, as validated by semiconductor microdisk laser simulations.

  8. Similar Transition States Mediate the Q-cycle and Superoxide Production by the Cytochrome bc1 Complex

    International Nuclear Information System (INIS)

    Forquer, Isaac P.; Covian, Raul; Bowman, Michael K.; Trumpower, Bernard; Kramer, David M.

    2006-01-01

    The cytochrome bc complexes found in mitochondria, chloroplasts and many bacteria catalyze a critical reaction in their respective electron transport chains. The quinol oxidase (Qo) site in this complex oxidizes a hydroquinone (quinol), reducing two one-electron carriers, a low-potential cytochrome b heme and a ''Rieske'' iron-sulfur cluster. The overall electron transfer reactions are coupled to transmembrane translocation of protons via a ''Q-cycle'' mechanism, which generates proton motive force for ATP synthesis. Since semiquinone intermediates of quinol oxidation are generally highly reactive, one of the key questions in this field is: how does the Qo site oxidize quinol without the production of deleterious side reactions including superoxide production? We attempt to test three possible general models to account for this behavior: (1) The Qo site semiquinone (or quinol:imidazolate complex) is unstable and thus occurs at a very low steady-state concentration, limiting O2 reduction; (2) the Qo site semiquinone is highly stabilized making it unreactive towards oxygen; and (3) the Qo site catalyzes a quantum mechanically-coupled two-electron/two proton transfer without a semiquinone intermediate. Enthalpies of activation were found to be almost identical between the uninhibited Q-cycle and superoxide production in the presence of Antimycin A in wild type. This behavior was also preserved in a series of mutants with altered driving forces for quinol oxidation. Overall, the data supports models where the rate-limiting step for both Q-cycle and superoxide production are essentially identical, consistent with model 1 but requiring modifications to models 2 and 3

  9. Multilayer Finite-Element Model Application to Define the Bearing Structure Element Stress State of Launch Complexes

    Directory of Open Access Journals (Sweden)

    V. A. Zverev

    2016-01-01

    Full Text Available The article objective is to justify the rationale for selecting the multilayer finite element model parameters of the bearing structure of a general-purpose launch complex unit.A typical design element of the launch complex unit, i.e. a mount of the hydraulic or pneumatic cylinder, block, etc. is under consideration. The mount represents a set of the cantilevered axis and external structural cage. The most loaded element of the cage is disk to which a moment is transferred from the cantilevered axis due to actuator effort acting on it.To calculate the stress-strain state of disk was used a finite element method. Five models of disk mount were created. The only difference in models was the number of layers of the finite elements through the thickness of disk. There were models, which had one, three, five, eight, and fourteen layers of finite elements through the thickness of disk. For each model, we calculated the equivalent stresses arising from the action of the test load. Disk models were formed and calculated using the MSC Nastran complex software.The article presents results in the table to show data of equivalent stresses in each of the multi-layered models and graphically to illustrate the changing equivalent stresses through the thickness of disk.Based on these results we have given advice on selecting the proper number of layers in the model allowing a desirable accuracy of results with the lowest run time. In addition, it is concluded that there is a need to use the multi-layer models in assessing the performance of structural elements in case the stress exceeds the allowable one in their surface layers.

  10. The Dissociative Subtype of Posttraumatic Stress Disorder: Unique Resting-State Functional Connectivity of Basolateral and Centromedial Amygdala Complexes.

    Science.gov (United States)

    Nicholson, Andrew A; Densmore, Maria; Frewen, Paul A; Théberge, Jean; Neufeld, Richard Wj; McKinnon, Margaret C; Lanius, Ruth A

    2015-09-01

    Previous studies point towards differential connectivity patterns among basolateral (BLA) and centromedial (CMA) amygdala regions in patients with posttraumatic stress disorder (PTSD) as compared with controls. Here we describe the first study to compare directly connectivity patterns of the BLA and CMA complexes between PTSD patients with and without the dissociative subtype (PTSD+DS and PTSD-DS, respectively). Amygdala connectivity to regulatory prefrontal regions and parietal regions involved in consciousness and proprioception were expected to differ between these two groups based on differential limbic regulation and behavioral symptoms. PTSD patients (n=49) with (n=13) and without (n=36) the dissociative subtype and age-matched healthy controls (n=40) underwent resting-state fMRI. Bilateral BLA and CMA connectivity patterns were compared using a seed-based approach via SPM Anatomy Toolbox. Among patients with PTSD, the PTSD+DS group exhibited greater amygdala functional connectivity to prefrontal regions involved in emotion regulation (bilateral BLA and left CMA to the middle frontal gyrus and bilateral CMA to the medial frontal gyrus) as compared with the PTSD-DS group. In addition, the PTSD+DS group showed greater amygdala connectivity to regions involved in consciousness, awareness, and proprioception-implicated in depersonalization and derealization (left BLA to superior parietal lobe and cerebellar culmen; left CMA to dorsal posterior cingulate and precuneus). Differences in amygdala complex connectivity to specific brain regions parallel the unique symptom profiles of the PTSD subgroups and point towards unique biological markers of the dissociative subtype of PTSD.

  11. Event-based state estimation for a class of complex networks with time-varying delays: A comparison principle approach

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Wenbing [Department of Mathematics, Yangzhou University, Yangzhou 225002 (China); Wang, Zidong [Department of Computer Science, Brunel University London, Uxbridge, Middlesex, UB8 3PH (United Kingdom); Liu, Yurong, E-mail: yrliu@yzu.edu.cn [Department of Mathematics, Yangzhou University, Yangzhou 225002 (China); Communication Systems and Networks (CSN) Research Group, Faculty of Engineering, King Abdulaziz University, Jeddah 21589 (Saudi Arabia); Ding, Derui [Shanghai Key Lab of Modern Optical System, Department of Control Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093 (China); Alsaadi, Fuad E. [Communication Systems and Networks (CSN) Research Group, Faculty of Engineering, King Abdulaziz University, Jeddah 21589 (Saudi Arabia)

    2017-01-05

    The paper is concerned with the state estimation problem for a class of time-delayed complex networks with event-triggering communication protocol. A novel event generator function, which is dependent not only on the measurement output but also on a predefined positive constant, is proposed with hope to reduce the communication burden. A new concept of exponentially ultimate boundedness is provided to quantify the estimation performance. By means of the comparison principle, some sufficient conditions are obtained to guarantee that the estimation error is exponentially ultimately bounded, and then the estimator gains are obtained in terms of the solution of certain matrix inequalities. Furthermore, a rigorous proof is proposed to show that the designed triggering condition is free of the Zeno behavior. Finally, a numerical example is given to illustrate the effectiveness of the proposed event-based estimator. - Highlights: • An event-triggered estimator is designed for complex networks with time-varying delays. • A novel event generator function is proposed to reduce the communication burden. • The comparison principle is utilized to derive the sufficient conditions. • The designed triggering condition is shown to be free of the Zeno behavior.

  12. Synthesis and characterization of para-pyridine linked NHC palladium complexes and their studies for the Heck-Mizoroki coupling reaction.

    Science.gov (United States)

    Liu, Ya-Ming; Lin, Yi-Chun; Chen, Wen-Ching; Cheng, Jen-Hao; Chen, Yi-Lin; Yap, Glenn P A; Sun, Shih-Sheng; Ong, Tiow-Gan

    2012-06-28

    This paper describes the synthesis of 1-(pyridine-4-ylmethyl) NHC and their Pd(II) and Ag(I) complexes, which are fully characterized. Interestingly, we have also synthesized a Pd complex 3a-CO(3) using a more direct treatment of K(2)CO(3) with PdCl(2). 3a-CO(3) represents the first reported solid structure of a Pd η(2)-carbonato complex stabilized by an NHC framework. 3a-CO(3) can be easily converted to a PdCl(2) derivative by treating it with chloroform. We have found these palladium complexes mediate the Heck-Mizoroki coupling with a low catalyst loading. Furthermore, we also expand such catalytic manifold toward constructing fused polyaromatic substrates, a highly useful class of compounds in optoelectronic chemistry.

  13. Thr202Ala in thyA Is a Marker for the Latin American Mediterranean Lineage of the Mycobacterium tuberculosis Complex Rather than Para-Aminosalicylic Acid Resistance

    KAUST Repository

    Feuerriegel, S.; Koser, C.; Trube, L.; Archer, John A.C.; Rusch Gerdes, S.; Richter, E.; Niemann, S.

    2010-01-01

    Single nucleotide polymorphisms (SNPs) involved in the development of resistance represent powerful markers for the rapid detection of first- and second-line resistance in clinical Mycobacterium tuberculosis complex (MTBC) isolates. However

  14. DRIS norms for evaluating the nutritional state of apple tree Normas DRIS para avaliação do estado nutricional da macieira

    Directory of Open Access Journals (Sweden)

    Gilmar Ribeiro Nachtigall

    2007-06-01

    Full Text Available For Brazilian conditions there are still no studies on the use of the diagnosis and recommendation of the integrated system (DRIS for nutritional diagnosis of the apple tree. The nutritional diagnosis of the apple tree is made using the criterion of sufficiency range. The aim of this report is to establish DRIS norms to interpret the results of apple tree leaf analysis in South Brazil. The study covered the apple producing areas of the states of Rio Grande do Sul and Santa Catarina, in 70 orchards selected for their high productivity and employment of excellent management techniques. The concentrations of nitrogen, phosphorus, potassium, calcium, magnesium, boron, copper, iron, manganese, and zinc were determined in leaf samples. DRIS indices were calculated using two criteria for the choice of the ratio order of nutrients (F value - ratio of the variance of the relationships among nutrients between the reference group and the low productivity group, and R value - correlation coefficients between the productivity values and the relationship between pairs of nutrients and three forms to calculate the nutrient functions (methods of Beaufils, Jones and Elwali & Gascho. The two criteria for the choice of the ratio order of the nutrients selected different ratios. The concentrations of nutrients presented positive correlations (P Para as condições brasileiras, ainda não existem estudos sobre a utilização do sistema integrado de diagnose e recomendação (DRIS para a diagnose nutricional da macieira, cujo diagnóstico nutricional das plantas é feito utilizando o critério de faixa de suficiência. Este trabalho teve por objetivo estabelecer normas DRIS, visando à interpretação dos resultados de análises de folhas de plantas de macieira no Sul do Brasil. O estudo foi realizado nas regiões produtoras de maçã do Rio Grande do Sul e de Santa Catarina, em 70 pomares selecionados quanto à produtividade e técnicas de manejo do pomar. Foram

  15. Herd-level prevalence and risk factors for bovine viral diarrhea virus infection in cattle in the State of Paraíba, Northeastern Brazil.

    Science.gov (United States)

    Fernandes, Leise Gomes; Nogueira, Adriana Hellmeister de Campos; De Stefano, Eliana; Pituco, Edviges Maristela; Ribeiro, Cláudia Pestana; Alves, Clebert José; Oliveira, Tainara Sombra; Clementino, Inácio José; de Azevedo, Sérgio Santos

    2016-01-01

    Serological surveys based on a planned sampling on bovine viral diarrhea virus (BVDV) infection in Brazilian cattle herds are scarce. A cross-sectional study was carried out to determine herd- and animal-level seroprevalences and to identify risk factors associated with herd-level seroprevalence for BVDV infection in the State of Paraíba, Northeastern Brazil, from September 2012 to January 2013. The state was divided into three sampling strata, and for each stratum, the prevalence of herds infected with BVDV and the prevalence of seropositive animals was estimated by a two-stage sampling survey. In total, 2443 animals were sampled from 478 herds. A virus-neutralization test was used for BVDV antibody detection. A herd was considered positive when at least one seropositive animal was detected. The herd- and animal-level prevalences in the State of Paraíba were 65.5% (95% confidence interval (CI) = 61.1-69.7%) and 39.1% (95% CI = 33.1-45.6%), respectively. The frequency of seropositive animals per herd ranged from 10 to 100% (median of 50%). The risk factors identified were as follows: more than six calves aged ≤12 months (odds ratio (OR) = 3.72; 95% CI = 2.08-6.66), animal purchasing (OR = 1.66; 95% CI = 1.08-2.55), pasture rental (OR = 2.15; 95% CI = 1.35-3.55), and presence of veterinary assistance (OR = 2.04; 95% CI = 1.10-3.79). Our findings suggest that the implementation of control and prevention measures among farmers, with the aim of preventing dissemination of the agent in the herds, is necessary. Special attention should be given to addressing the identified risk factors, such as sanitary control prior to animal purchasing and to discourage the pasture rental, as well as to encourage the vaccination in the herds.

  16. Steady state and time-resolved fluorescence spectroscopy of quinine sulfate dication bound to sodium dodecylsulfate micelles: Fluorescent complex formation

    Energy Technology Data Exchange (ETDEWEB)

    Joshi, Sunita; Pant, Debi D., E-mail: ddpant@pilani.bits-pilani.ac.in

    2014-01-15

    Interaction of quinine sulfate dication (QSD) with anionic, sodium dodecylsulphate (SDS) surfactant has been studied at different premicellar, micellar and postmicellar concentrations in aqueous phase using steady state, time-resolved fluorescence and fluorescence anisotropy techniques. At premicellar concentrations of SDS, the decrease in absorbance, appearance of an extra fluorescence band at lower wavelengths and tri-exponential decay behavior of fluorescence, are attributed to complex formation between QSD molecules and surfactant monomers. At postmicellar concentrations the red shift in fluorescence spectrum, increase in quantum yield and increase in fluorescence lifetimes are attributed to incorporation of solute molecules to micelles. At lower concentrations of SDS, a large shift in fluorescence is observed on excitation at the red edge of absorption spectrum and this is explained in terms of distribution of ion pairs of different energies in the ground state and the observed fluorescence lifetime behavior corroborates with this model. The temporal fluorescence anisotropy decay of QSD in SDS micelles allowed determination of restriction on the motion of the fluorophore. All the different techniques used in this study reveal that the photophysics of QSD is very sensitive to the microenvironments of SDS micelles and QSD molecules reside at the water-micelle interface. -- Highlights: • Probe molecule is very sensitive to microenvironment of micelles. • Highly fluorescent ion-pair formation has been observed. • Modulated photophysics of probe molecule in micellar solutions has been observed. • Probe molecules strongly bind with micelles and reside at probe–micelle interface.

  17. Complex Kohn variational principle for two-nucleon bound-state and scattering with the tensor potential

    International Nuclear Information System (INIS)

    Araujo Junior, C.F. de; Adhikari, S.K.; Tomio, L.

    1993-10-01

    Complex Kohn variational principle is applied to the numerical solution of the fully off-shell Lippmann-Schwinger equation for nucleon-nucleon scattering for various partial waves including the coupled 3 S 1 - 3 D 1 channel. Analytic expressions are obtained for all the integrals in the method for a suitable choice of expansion functions. Calculations with the partial waves 1 S 0 , 1 P 1 , 1 D 2 , and 3 S 1 - 3 D 1 of the Reid soft core potential show that the method converges faster than other solution schemes not only for the phase shift but also for the off-shell t matrix elements. It is also shown that its is trivial to modify this variational principle in order to make it suitable for bound-stage calculations. The bound-state approach is illustrated for the 3 S 1 - 3 D 1 channel of the Reid soft-core potential for calculating the deuteron binding, wave function and the D state asymptotic parameters. (author)

  18. Chemical Equilibrium Models for the S3 State of the Oxygen-Evolving Complex of Photosystem II.

    Science.gov (United States)

    Isobe, Hiroshi; Shoji, Mitsuo; Shen, Jian-Ren; Yamaguchi, Kizashi

    2016-01-19

    We have performed hybrid density functional theory (DFT) calculations to investigate how chemical equilibria can be described in the S3 state of the oxygen-evolving complex in photosystem II. For a chosen 340-atom model, 1 stable and 11 metastable intermediates have been identified within the range of 13 kcal mol(-1) that differ in protonation, charge, spin, and conformational states. The results imply that reversible interconversion of these intermediates gives rise to dynamic equilibria that involve processes with relocations of protons and electrons residing in the Mn4CaO5 cluster, as well as bound water ligands, with concomitant large changes in the cluster geometry. Such proton tautomerism and redox isomerism are responsible for reversible activation/deactivation processes of substrate oxygen species, through which Mn-O and O-O bonds are transiently ruptured and formed. These results may allow for a tentative interpretation of kinetic data on substrate water exchange on the order of seconds at room temperature, as measured by time-resolved mass spectrometry. The reliability of the hybrid DFT method for the multielectron redox reaction in such an intricate system is also addressed.

  19. International competitiveness of brazilian and paraná state`s coffe complex / Competitividade internacional do complexo cafeeiro brasileiro e paranaense

    Directory of Open Access Journals (Sweden)

    Marcela Vasques Cintra

    2008-08-01

    Full Text Available The objective of this article is to analyze the determinants aspects of the competitiveness of the exportations of the coffee complex in Paraná State between 1990 and 2003 . The study intends to systematize: the recent literature on the subject, focusing the competitiveness of the main products of the brazilian guideline of exportations. A critical review of literature was made about the theories of international trade and competitiveness. It was characterized the dynamics of the complex of Brazilian coffee. The article identifies the competitive advantages of the Paraná coffee (green, roasted, soluble and special in relation to the competing countries; discusses the barriers to imports imposed to the brazilian coffee by the importing countries, and ends with the possible public and private policies favorable to the competitiveness of the coffee exportations.O objetivo deste artigo é analisar os determinantes da competitividade das exportações do complexo cafeeiro paranaense entre 1990 e 2003. O estudo pretende sistematizar: a literatura recente sobre o tema, enfocando a competitividade de um dos principais produtos da pauta de exportações brasileira e do Paraná. Realizou-se a revisão crítica da literatura das teorias do comércio internacional e da competitividade e em seguida, caracterizou-se a dinâmica do complexo cafeeiro do brasileiro e paranaense. O artigo identifica as vantagens competitivas do café paranaense (verde, torrado, solúvel e especial em relação aos países concorrentes; discute as barreiras às importações impostas ao café brasileiro pelos países importadores; e finaliza com as possíveis políticas públicas e privadas favoráveis à competitividade das exportações de café.

  20. Evaluating the Nature of So-Called S*-State Feature in Transient Absorption of Carotenoids in Light-Harvesting Complex 2 (LH2) from Purple Photosynthetic Bacteria.

    Science.gov (United States)

    Niedzwiedzki, Dariusz M; Hunter, C Neil; Blankenship, Robert E

    2016-11-03

    Carotenoids are a class of natural pigments present in all phototrophic organisms, mainly in their light-harvesting proteins in which they play roles of accessory light absorbers and photoprotectors. Extensive time-resolved spectroscopic studies of these pigments have revealed unexpectedly complex photophysical properties, particularly for carotenoids in light-harvesting LH2 complexes from purple bacteria. An ambiguous, optically forbidden electronic excited state designated as S* has been postulated to be involved in carotenoid excitation relaxation and in an alternative carotenoid-to-bacteriochlorophyll energy transfer pathway, as well as being a precursor of the carotenoid triplet state. However, no definitive and satisfactory origin of the carotenoid S* state in these complexes has been established, despite a wide-ranging series of studies. Here, we resolve the ambiguous origin of the carotenoid S* state in LH2 complex from Rba. sphaeroides by showing that the S* feature can be seen as a combination of ground state absorption bleaching of the carotenoid pool converted to cations and the Stark spectrum of neighbor neutral carotenoids, induced by temporal electric field brought by the carotenoid cation-bacteriochlorophyll anion pair. These findings remove the need to assign an S* state, and thereby significantly simplify the photochemistry of carotenoids in these photosynthetic antenna complexes.

  1. The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. II. Homo-arrays of LH2 complexes reconstituted into phospholipid model membranes.

    Science.gov (United States)

    Pflock, Tobias J; Oellerich, Silke; Krapf, Lisa; Southall, June; Cogdell, Richard J; Ullmann, G Matthias; Köhler, Jürgen

    2011-07-21

    We performed time-resolved spectroscopy on homoarrays of LH2 complexes from the photosynthetic purple bacterium Rhodopseudomonas acidophila. Variations of the fluorescence transients were monitored as a function of the excitation fluence and the repetition rate of the excitation. These parameters are directly related to the excitation density within the array and to the number of LH2 complexes that still carry a triplet state prior to the next excitation. Comparison of the experimental observations with results from dynamic Monte Carlo simulations for a model cluster of LH2 complexes yields qualitative agreement without the need for any free parameter and reveals the mutual relationship between energy transfer and annihilation processes.

  2. Integrated energy resources planning for Sao Paulo state region; Proposicao para o interior paulista do planejamento integrado de recursos

    Energy Technology Data Exchange (ETDEWEB)

    Udaeta, Miguel Edgar Morales; Ino, William Takanori; Grimoni, Jose Aquiles Baeso; Galvao, Luiz Claudio Ribeiro [Universidade de Sao Paulo (USP), SP (Brazil). Dept. de Engenharia de Energia e Automacao Eletricas. Grupo de Energia], e-mail: udaeta@pea.usp.br

    2004-07-01

    The present work has in view the elaboration of projections based on IRP (Integrated Energy Resources Planning) in order to propose an alternative of sustainable development to one region of the State of Sao Paulo. Using the data of the region, gathered in the past years by several researches of the GEPEA-USP, scenarios of the development and consume of energy have been created. In these scenarios, two possibilities to supply the demand of the region were considered: energy of clean sources and/or renewable as well as energy of sources that have lower costs. In order to simulate the behavior of several factors of the offer and demand, the LEAP (Long-range Energy Alternatives Planning) has been used. Both scenarios have vantages and disadvantages, but the clean sources scenario certainly could supply the needs of the region for the next twenty years. Uncertainties in longer periods make the forecasts no much reliable, because changes in both, demand and offer, could invalidate the study. The best is an accompaniment of the sector's behavior in order to make shorter projections, ten years for example, to set the generator estate and policies of consumption. Long forecasts are good to show the limits of the system and the reserve to preview emergency situations as occurred in 2001 with shortness of water supply and consequently broke of energy catering. (author)

  3. Integrated energy resources planning for Sao Paulo state region; Proposicao para o interior paulista do planejamento integrado de recursos

    Energy Technology Data Exchange (ETDEWEB)

    Udaeta, Miguel Edgar Morales; Ino, William Takanori; Grimoni, Jose Aquiles Baeso; Galvao, Luiz Claudio Ribeiro [Universidade de Sao Paulo (USP), SP (Brazil). Dept. de Engenharia de Energia e Automacao Eletricas. Grupo de Energia], e-mail: udaeta@pea.usp.br

    2004-07-01

    The present work has in view the elaboration of projections based on IRP (Integrated Energy Resources Planning) in order to propose an alternative of sustainable development to one region of the State of Sao Paulo. Using the data of the region, gathered in the past years by several researches of the GEPEA-USP, scenarios of the development and consume of energy have been created. In these scenarios, two possibilities to supply the demand of the region were considered: energy of clean sources and/or renewable as well as energy of sources that have lower costs. In order to simulate the behavior of several factors of the offer and demand, the LEAP (Long-range Energy Alternatives Planning) has been used. Both scenarios have vantages and disadvantages, but the clean sources scenario certainly could supply the needs of the region for the next twenty years. Uncertainties in longer periods make the forecasts no much reliable, because changes in both, demand and offer, could invalidate the study. The best is an accompaniment of the sector's behavior in order to make shorter projections, ten years for example, to set the generator estate and policies of consumption. Long forecasts are good to show the limits of the system and the reserve to preview emergency situations as occurred in 2001 with shortness of water supply and consequently broke of energy catering. (author)

  4. X-ray studies on crystalline complexes involving amino acids and peptides. XXXII. Effect of chirality on ionisation state, stoichiometry and aggregation in the complexes of oxalic acid with DL- and L-lysine.

    Science.gov (United States)

    Venkatraman, J; Prabu, M M; Vijayan, M

    1997-08-01

    Crystals of the oxalic acid complex of DL-lysine (triclinic P1; a = 5.540(1), b = 10.764(2), c = 12.056(2) A, alpha = 77.8(1), beta = 80.6(1), gamma = 75.6(1).; R = 4.7% for 2023 observed reflections) contain lysine and semioxalate ions in the 1:1 ratio, whereas the ratio of lysine and semioxalate/oxalate ions is 2:3 in the crystals of the L-lysine complex (monoclinic P2(1); alpha = 4.906(1), b = 20.145(4), c = 12.455(1) A, beta = 92.5(1).; R = 4.4% for 1494 observed reflections). The amino acid molecule in the L-lysine complex has an unusual ionisation state with positively charged alpha- and side-chain amino groups and a neutral carboxyl group. The unlike molecules aggregate into separate alternating layers in the DL-lysine complex in a manner similar to that observed in several of the amino acid complexes. The L-lysine complex exhibits a new aggregation pattern which cannot be easily explained in terms of planar features, thus emphasizing the fundamental dependence of aggregation on molecular characteristics. Despite the differences in stoichiometry, ionisation state and long-range aggregation patterns, the basic element of aggregation in the two complexes exhibits considerable similarity.

  5. Implanted of Pb-Pb methodology in whole rock: examples of use in Carajas Mineral Province, Para State

    International Nuclear Information System (INIS)

    Rodrigues, Elizabeth Maria Soares.

    1992-01-01

    This work presents the first data obtained by Pb-Pb systematics in whole rock and separated minerals. The Pb isotopic compositions of samples were determined by mass spectrometry. The average analytical errors of the ratios 206 Pb/ 204 Pb, 207 Pb/ 204 Pb and 208 Pb/ 209 Pb were 0.10%, 0.12% and 0.15%, respectively. The age calculation in the 207 Pb/ 204 Pb x 206 Pb/ 204 Pb diagram was obtained by York (1969) and Ludwig (1900). In order to verify the efficiency of the implanted methodology, 5 rocks from of the Carajas Mineral Province and Sao Felix do Xingu Region were dated. The Velho Guilherme granite, intrusive into the granite-greenstone terrains of Tucuma Region (PA), provided a Pb-Pb crystallization age (11 WR,2 FELD) of 1874 ± 15 Ma with MSWD = 1.53 and μ 1 = 8.9 ± 0.07 (single stage). The Granulitic rocks of Pium complex (Catete area), located at the SW of Serra dos Carajas, provided a Pb-Pb age of 3044 ± 64 Ma with MSWD = 28.72 and μ 1 = 9.2 ± .58. In the Rio Maria Region, Mata Surrao monzogranite which cross cut the gneiss basement and associated to the greenstone belts, defined a crystallization Pb-Pb (8 WR) age of 2876 ± 10 Ma with MSWD = 3.71 and μ 1 = 8.2 ± 0.11. In the same region, the Metabasalts of the Identidade greenstone belt, (Andorinhas supergroup), showed a Pb-Pb age in whole rock (7 samples) of 3400 ± 109 Ma with MSWD = 7.97 and μ 1 = 9.6 ± 1.44. Five whole rock samples from metadacites, located in the central part of the Identidade greenstone, provided a crystallization age of 2944 ± 88 Ma with MSWD 31.52 and μ 1 = 8.2 ± .70. The results obtained in this work emphasize the high potentiality of the Pb-Pb method of dating to obtain crystallization ages of Precambrian rocks. (author). 69 refs., 23 figs., 12 tabs

  6. Intermolecular potential and rovibrational states of the H{sub 2}O-D{sub 2} complex

    Energy Technology Data Exchange (ETDEWEB)

    Avoird, Ad van der, E-mail: A.vanderAvoird@theochem.ru.nl [Theoretical Chemistry, Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen (Netherlands); Scribano, Yohann [Laboratoire Interdisciplinaire Carnot de Bourgogne-UMR 5209, CNRS-Universite de Bourgogne, 9 Av. Alain Savary, B.P. 47870, F-21078 Dijon Cedex (France); Faure, Alexandre [UJF-Grenoble 1/CNRS, Institut de Planetologie et d' Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041 (France); Weida, Miles J. [Daylight Solutions, 15378 Avenue of Science, San Diego, CA 92128 (United States); Fair, Joanna R. [Department of Radiology, MSC10 5530, 1 University of New Mexico, Albuquerque, NM 87131-0001 (United States); Nesbitt, David J. [JILA, University of Colorado and National Institute of Standards and Technology, and Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0440 (United States)

    2012-05-03

    Graphical abstract: H{sub 2}O-D{sub 2} potential surface and pH{sub 2}O-oD{sub 2} ground state wave function, for planar geometries. Highlights: Black-Right-Pointing-Pointer The interaction between H{sub 2}O and H{sub 2} is of great astrophysical interest. Black-Right-Pointing-Pointer The rovibrational states of H{sub 2}O-D{sub 2} were computed on an ab initio potential surface. Black-Right-Pointing-Pointer Results are compared with the rovibrational states of H{sub 2}O-H{sub 2} computed recently. Black-Right-Pointing-Pointer We measured the high-resolution infrared spectrum of H{sub 2}O-D{sub 2} in the H{sub 2}O bend region. Black-Right-Pointing-Pointer Comparison with the calculations provides information on H{sub 2}O-H{sub 2} potential surface. - Abstract: A five-dimensional intermolecular potential for H{sub 2}O-D{sub 2} was obtained from the full nine-dimensional ab initio potential surface of Valiron et al. [P. Valiron, M. Wernli, A. Faure, L. Wiesenfeld, C. Rist, S. Kedzuch, J. Noga, J. Chem. Phys. 129 (2008) 134306] by averaging over the ground state vibrational wave functions of H{sub 2}O and D{sub 2}. On this five-dimensional potential with a well depth D{sub e} of 232.12 cm{sup -1} we calculated the bound rovibrational levels of H{sub 2}O-D{sub 2} for total angular momentum J = 0-3. The method used to compute the rovibrational levels is similar to a scattering approach-it involves a basis of coupled free rotor wave functions for the hindered internal rotations and the overall rotation of the dimer-while it uses a discrete variable representation of the intermolecular distance coordinate R. The basis was adapted to the permutation symmetry associated with the para/ortho (p/o) nature of both H{sub 2}O and D{sub 2}, as well as to inversion symmetry. As expected, the H{sub 2}O-D{sub 2} dimer is more strongly bound than its H{sub 2}O-H{sub 2} isotopologue [cf. A. van der Avoird, D.J. Nesbitt, J. Chem. Phys. 134 (2011) 044314], with dissociation energies D

  7. Frame complexity and the Financial Crisis: a comparison of the United States, the United Kingdom and Germany 2007-2012

    NARCIS (Netherlands)

    Kleinnijenhuis, J.; Schultz, F.; Oegema, D.

    2015-01-01

    Communicative complexity concerns the variety of issues and stakeholders (agenda complexity) and their associations (frame complexity) in the news. One issue may dominate news in crises (9/11, Katrina), but as soon as complexity recovers, uncertainty may decrease and the public mood may improve. The

  8. Potencial agroclimático para a Alpinia purpurata, no Estado de Pernambuco Agroclimatic potencial for Alpinia purpurata in the State of Pernambuco

    Directory of Open Access Journals (Sweden)

    Sérgio R. R. Medeiros

    2009-04-01

    Full Text Available Objetivou-se realizar o zoneamento agroclimático do Estado de Pernambuco, visando dar subsídios à seleção de locais para a implantação da flor tropical Alpinia purpurata. Dados climáticos de 123 localidades foram utilizados, dos quais 69 com uma série acima de 30 anos de observações e 54 abaixo de 30 anos de observações obtendo-se assim, melhor representatividade de dados no Estado. Dos dados climáticos de temperaturas médias do ar e precipitação pluviométrica, calcularam-se os balanços hídricos climatológicos. Escolheram-se os municípios de Igarassu, Primavera, Goiana e São Lourenço da Mata para serem representativos climatológicos, por serem produtores da espécie em Pernambuco. De posse dos dados dos balanços hídricos e das temperaturas mínima e máxima do ar, se estimaram os índices de limite térmico e hídrico em relação às exigências da espécie nos municípios representativos e só então estes índices foram extrapolados para todo o Estado. De acordo com o estudo, Pernambuco apresentou 6 localidades com aptidão plena, 16 com aptidão regular e 101 com inaptidão à espécie.This study aimed at accomplishing the agroclimatic zoning of Pernambuco State, in order to provide subsidies for the selection of areas for implantation of Alpinia purpurata tropical flower. The climatic data of 123 localities (69 with a period above 30 years and 54 below 30 years were used, thus getting a better representation of the data in the state. From climatic data of the average temperatures of air and rainfall, the climatologic water balance has been calculated. The cities of Igarassú, Primavera, Goiana and São Lourenço da Mata were chosen to be climatic representatives as they are the producers of the species in Pernambuco. By having the data of the water balance and the minimum and maximum air temperatures, the indexes of thermal and water limit in relation to the requirements of the species in the representative cities

  9. Effects of ligand substitution on the excited state dynamics of the Ru(dcbpy)(CO){sub 2}I{sub 2} complex

    Energy Technology Data Exchange (ETDEWEB)

    Lehtovuori, Viivi; Kallioinen, Jani; Myllyperkioe, Pasi; Haukka, Matti; Korppi-Tommola, Jouko

    2003-11-15

    Spectroscopic evidence suggest [PCCP 3 (2001) 1992] that illumination with visible light of the [trans-I-Ru(dcbpy)(CO){sub 2}I{sub 2}] (dcbpy4,4{sup '}-dicarboxy-2,2{sup '}-bipyridine) complex in solution induces dissociation of a CO group followed by reorganization of the ligands and attachment of a solvent molecule. In the present study, we report results on excited state dynamics of this ruthenium complex and its photoproduct. Femtosecond transient absorption measurements reveal dominance of excited state absorption of the reactant and the photoproduct [cis-I-Ru(dcbpy)(CO)(Sol)I{sub 2}] (Sol=ethanol or acetonitrile) in the visible spectral region. The time-resolved measurements for the reactant at 77 K indicate interligand charge transfer from mixed Ru-I states to empty dcbpy orbitals. For the photoproduct, no such transfer was observed. In both complexes recovery from the lowest energy excited triplet state to the ground state occurs via two channels: radiative relaxation and a parallel barrier controlled non-radiative relaxation. The barrier is much higher in the reactant (about 850 cm{sup -1}) than in the product. A combination of DFT and ZINDO/CI calculations was used to estimate excited singlet and triplet spectra of the reactant and the product molecules. Calculated singlet-triplet difference spectra qualitatively match the observed transient spectra 500 fs after excitation supporting the idea that observed excited state relaxation occurs from the triplet states in both complexes.

  10. Waste is a Terrible Thing to Mind: Perspectives on the Cleanup of the United States Nuclear Weapons Complex

    Science.gov (United States)

    Bodde, David

    1997-03-01

    For the 50 years of the Cold War, the United States nuclear arsenal was the cornerstone of our national security. These weapons were designed, manufactured, and armed with fissionable materials in an industrial complex that, at its peak, included about 16 major facilities and vast tracts of land in Nevada, Idaho, Washington, and South Carolina. Included among these are such well-known sites as the Savannah River Plant, the Hanford, Oak Ridge, and the Idaho National Engineering Laboratory. The Cold War, that "long twilight struggle" in the evocative phrase of John Kennedy, left little time and few resources for understanding and managing the environmental consequences of nuclear weapons production. At the same time, perceptions of the special nature of the atom led to a concentration of governance in the Atomic Energy Commission and the Joint Committee on Atomic Energy. Thus, external feedback for the managers of the complex was heavily filtered. But the imperatives of the Cold War have waned, and our understanding of the implications for the environment and the health and safety of workers has grown. By 1995 the Department of Energy (DoE) had spent about 23 billion in identifying and characterizing its waste, managing it, and assessing the actions needed to clean up the 120 sites in 36 states. Yet the majority of the task appeared ahead. Estimates made in 1995 suggested a total cost ranging from 200-350 billion and a time to complete of 75 years. If these were true, the cleanup of the weapons complex would become the largest civil works project in the history of humankind. Over the past year or so, the DoE program has shifted its focus from studies to actual cleanup. A strategic plan has been proposed that would accomplish most of the needed work over ten years at a cost of about $85 billion. At the same time, the Department is proposing to transfer oversight to the Nuclear Regulatory Commission, the Environmental Protection Agency, and the states. This Invited

  11. Solid state and solution photoluminescence properties of a novel meso–meso-linked porphyrin dimer Schiff base ligand and its metal complexes

    Energy Technology Data Exchange (ETDEWEB)

    Tümer, Mehmet, E-mail: mtumer@ksu.edu.tr; Ali Güngör, S.; Raşit Çiftaslan, A.

    2016-02-15

    We prepared novel meso-meso linked 4-bromo-2,6-bis[5-(4-iminophenyl)-10,15,20-triphenylporphyrin]phenol (HL) and its Cu(II), Fe(III), Mn(III), Pt(II) and Zn(II) transition metal complexes. Structural characterizations of the ligand (HL) and its metal complexes were done by the spectroscopic and analytical methods. The electronic absorption and photoluminescence spectra of the ligand, its metal complexes and the metal salts used for preparing of the complexes were investigated in the solid and solution state. The emission and excitation data of the CuCl{sub 2}·2H{sub 2}O in both solid and the solution state were obsrved in the longest wavelenght. On the other hand, the emission value of the ZnCl{sub 2} salt was shown at the shortest wavelenght. The emission values of the [LCu{sub 4}Cl{sub 3}(H{sub 2}O){sub 2}]H{sub 2}O and LPt{sub 4}Cl{sub 3} complexes in the solid state are bigger than the other metal salts. The ligand and its metal complexes show the very interesting absorption spectral properties in the solid state. Metal complexes have less number Q bands in the solid state. The electrochemical properties of the ligand and its metal complexes were investigated and found that they show the reversible or irreversible redox processes at the different scan rates. Thermal properties of the compopunds were investigated in the 20–900 °C temperature range.

  12. A strong steric hindrance effect on ground state, excited state, and charge separated state properties of a CuI-diimine complex captured by X-ray transient absorption spectroscopy

    DEFF Research Database (Denmark)

    Huang, J.; Mara, M.W.; Stickrath, A.B.

    2014-01-01

    of phenanthroline. The structural dynamics of the photoinduced charge transfer process in the [CuI(dppS)2]+/TiO2 hybrid is also investigated, which suggests a more restricted environment for the complex upon binding to TiO2 NPs. Moreover, the Cu-N bond length of the oxidized state of [CuI(dppS)2]+ after electron...... dynamics and structures as well as those of the charge separated state resulting from the interfacial electron injection from the MLCT state to TiO2 nanoparticles (NPs). The OTA results show the absence of the sub-picosecond component previously assigned as the time constant for flattening, while the two...... injection to TiO2 NPs shortens by 0.05 Å compared to that in the ground state. The interpretation of these observed structural changes associated with excited and charge separated states will be discussed. These results not only set an example for applying XTA in capturing the intermediate structure...

  13. Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics

    International Nuclear Information System (INIS)

    Pršić, S.; Savić, S.M.; Branković, Z.; Vrtnik, S.; Dapčević, A.; Branković, G.

    2015-01-01

    Highlights: • Sodium cobaltite was synthesized by mechanochemically assisted solid-state reaction and citric acid complex (CAC) method. • We investigated effect of Cu-doping in NaCo 2−x Cu x O 4 (x = 0, 0.01, 0.03, 0.05). • ICP analysis showed that the controlling of the samples composition is easier by the CAC method. • The Seebeck coefficient in Cu-doped samples was higher compared to the undoped one. • The highest figure of merit was observed in the sample with the lowest Cu concentration. - Abstract: In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo 2−x Cu x O 4 (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 °C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to γ-NaCo 2 O 4 and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu 2+ substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by the CAC method, and it was almost twice

  14. Mechanochemically assisted solid-state and citric acid complex syntheses of Cu-doped sodium cobaltite ceramics

    Energy Technology Data Exchange (ETDEWEB)

    Pršić, S., E-mail: sanjaprsic@imsi.bg.ac.rs [Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade (Serbia); Savić, S.M., E-mail: slavicas@imsi.bg.ac.rs [Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade (Serbia); Branković, Z., E-mail: zorica.brankovic@imsi.bg.ac.rs [Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade (Serbia); Vrtnik, S., E-mail: stane.vrtnik@ijs.si [Institute Jožef Stefan, Condensed Matter Physics, Jamova cesta 39, 1000 Ljubljana (Slovenia); Dapčević, A., E-mail: hadzi-tonic@tmf.bg.ac.rs [Department of General and Inorganic Chemistry, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade (Serbia); Branković, G., E-mail: goran.brankovic@imsi.bg.ac.rs [Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade (Serbia)

    2015-08-15

    Highlights: • Sodium cobaltite was synthesized by mechanochemically assisted solid-state reaction and citric acid complex (CAC) method. • We investigated effect of Cu-doping in NaCo{sub 2−x}Cu{sub x}O{sub 4} (x = 0, 0.01, 0.03, 0.05). • ICP analysis showed that the controlling of the samples composition is easier by the CAC method. • The Seebeck coefficient in Cu-doped samples was higher compared to the undoped one. • The highest figure of merit was observed in the sample with the lowest Cu concentration. - Abstract: In the last decade, the sodium cobaltite ceramic became a promising candidate for potential thermoelectric applications, because of its large thermopower and low resistivity. In this work, polycrystalline samples of NaCo{sub 2−x}Cu{sub x}O{sub 4} (x = 0, 0.01, 0.03, 0.05) were prepared using mechanochemically assisted solid-state reaction method (MASSR) and the citric acid complex method (CAC). Bulk samples were prepared by pressing into disc-shaped pellets and subsequently subjected to a thermal treatment at 880 °C in inert argon atmosphere. Changes in structural and microstructural characteristics of the samples, caused by the substitution of Cu for Co, were characterized using X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), respectively. The results of inductively coupled plasma (ICP) analysis showed that the compositions of the final products correspond to γ-NaCo{sub 2}O{sub 4} and confirmed that desired compound was obtained in both syntheses procedures. The advantages and disadvantages of these two syntheses procedures have been observed and discussed: the CAC method enabled obtaining samples with higher density and fine microstructure compared to the MASSR method, thus better thermoelectric properties. The Cu{sup 2+} substitution led to the increase in Seebeck coefficient in both synthesis routes. The highest figure of merit of 0.022 at 300 K was observed for the sample doped with 1 mol% Cu, obtained by

  15. PROFESSIONAL TEACHERS’ DEVELOPMENT OF EDUCATIONAL COMPLEXES IN THE CONDITIONS OF INTRODUCTION OF THE FEDERAL STATE EDUCATIONAL STANDARD

    Directory of Open Access Journals (Sweden)

    Elena A. Sidenko

    2016-01-01

    Full Text Available RETRACTED ARTICLEThe aim of this publication is to familiarize readers with the particularities of training of school teams for the introduction of the Federal State Educational Standard (hereinafter – FSES in the initial stage and considering the features of creating a component of model, namely, program of management training to the introduction of the (FSES. The purpose of the study is to developmethodological bases of construction models of implementation of the Federal state educational standard as a system innovation.Methods. The theoretical and methodological basis of the investigation involves: concepts of motivation of work and reflexive-humanistic psychology; ideas of contextual and projective training, and also acmeological approach to continuous education of adults.Results and scientific novelty. The specifics of the program of professional development of shots for education corresponding to modern realities are described. This program assumes preparation of the school teams consisting of heads of the educational organizations, their deputies, methodologists and teachers. Adequate forms of carrying out internal and correspondence occupations with the organization of productive educational activity of listeners are selected; the complex of tasks for course and intersession occupations is developed. Training of listeners according to the developed program is based as the organizational and pedagogical cascade and cluster model combining resident instruction of the managerial personnel in the organizations of system of professional development with their innovative activity in the educational organizations. The course includes some levels: the basic, technological and organizational-activity-based. The basic level assumes development of the maintenance of FSES and development of innovative potential of listeners; technological level – technologies of conducting group work on development of FSES are mastered

  16. Unique insula subregion resting-state functional connectivity with amygdala complexes in posttraumatic stress disorder and its dissociative subtype.

    Science.gov (United States)

    Nicholson, Andrew A; Sapru, Iman; Densmore, Maria; Frewen, Paul A; Neufeld, Richard W J; Théberge, Jean; McKinnon, Margaret C; Lanius, Ruth A

    2016-04-30

    The insula and amygdala are implicated in the pathophysiology of posttraumatic stress disorder (PTSD), where both have been shown to be hyper/hypoactive in non-dissociative (PTSD-DS) and dissociative subtype (PTSD+DS) PTSD patients, respectively, during symptom provocation. However, the functional connectivity between individual insula subregions and the amygdala has not been investigated in persons with PTSD, with or without the dissociative subtype. We examined insula subregion (anterior, mid, and posterior) functional connectivity with the bilateral amygdala using a region-of-interest seed-based approach via PickAtlas and SPM8. Resting-state fMRI was conducted with (n=61) PTSD patients (n=44 PTSD-DS; n=17 PTSD+DS), and (n=40) age-matched healthy controls. When compared to controls, the PTSD-DS group displayed increased insula connectivity (bilateral anterior, bilateral mid, and left posterior) to basolateral amygdala clusters in both hemispheres, and the PTSD+DS group displayed increased insula connectivity (bilateral anterior, left mid, and left posterior) to the left basolateral amygdala complex. Moreover, as compared to PTSD-DS, increased insula subregion connectivity (bilateral anterior, left mid, and right posterior) to the left basolateral amygdala was found in PTSD+DS. Depersonalization/derealization symptoms and PTSD symptom severity correlated with insula subregion connectivity to the basolateral amygdala within PTSD patients. This study is an important first step in elucidating patterns of neural connectivity associated with unique symptoms of arousal/interoception, emotional processing, and awareness of bodily states, in PTSD and its dissociative subtype. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  17. A new polarimeter scheme based on solid state semiconductors Un nuevo esquema para polarímetros basado en semiconductor de estado sólido

    Directory of Open Access Journals (Sweden)

    Heiner Castro Gutierrez

    2012-12-01

    Full Text Available A new kind of polarimeter scheme is suggested using solid state semiconductors. The new approach is based on the modulation over the intensities of the diffracted beams through a two-dimensional chiral grating, reported recently. It will be demonstrated that at least four intensity measurements of no equivalent diffracted beams are needed in order to estimate the polarization state of the incident beam. The incident beam azimuth was varied by routing a linear polarizer lens mounting in a stepped motor. The intensities of four diffracted beams were measured using a screen, a CCD camera and some algorithms running in a computer. The LabVIEW development environment software was used for controlling the hardware and for presenting the results. MATLAB© was used for calculating the intensities of the diffracted beams and computing the azimuth of the incident beam. Although both the azimuth and ellipticity should be estimated, the experiments show that only the azimuth estimation yields accurate results. The ellipticity cannot be estimated with precision. The error on the azimuth estimation depends on the variation in the power of the incident beam. It was found that the azimuth estimation is accurate between [0,140 and (150,180] degrees. The cause of huge errors in the azimuth found between 140 and 150 degrees are kept unknown.Un nuevo esquema de polarímetro es sugerido usando semiconductores de estado sólido. La nueva aproximación está basada en la modulación sobre las intensidades de los rayos difractados a través de una rejilla quiral de dos dimensiones reportado recientemente. Será demostrado que al menos cuatro mediciones de intensidades de rayos difractados no equivalentes son necesarios para estimar el estado de polarización del rayo incidente. El azimut del rayo incidente es variado, rotando un lente polarizador lineal montado en un motor paso a paso. La intensidad de cuatro rayos difractados es medida por medio de una peque

  18. Modified gum Arabic hydrogels as matrices for controlled release of curcumin supramolecular complexes; Hidrogeis de goma arabica modificada como matrizes para libertacao controlada de complexos supramoleculares de curcumina

    Energy Technology Data Exchange (ETDEWEB)

    Gerola, Adriana P.; Silva, Danielle C., E-mail: avalente@ci.uc.pt [Department of Chemistry, University of Coimbra, Coimbra (Portugal); Rubira, Adley F.; Muniz, Edvani C. [Universidade Estadual de Maringa (GMPC/UEM), PR (Brazil). Grupo de Materiais Polimericos e Compositos; Jesus, Sandra; Borges, Olga [Faculty of Pharmacy, University of Coimbra, Coimbra (Portugal)

    2015-07-01

    Modified gum Arabic (GA) hydrogels show a pH-responsive behavior making them excellent matrices to be used for oral administration of drugs. Our goal is to study the behavior of those matrices in simulated gastric and intestinal fluids. In this work we will present how the methacrylation degree of GA, by using glycidyl methacrylate, can affect the properties of these hydrogels for controlled release. The drug used in this work is the curcumin (Cur). Cur is associated with numerous pharmacological activities, but their application is limited by the low water solubility. We will present some studies involving the formation of host-guest complexes between Cur and natural cyclodextrins. Both modified GA and hydrogels were characterized by different techniques. The kinetics release of Cur complex-containing modified GA hydrogels was studied to have an insight on the release mechanism and rate constants. Toxicity studies on undifferentiated and differentiated Caco-2 were also carried out. (author)

  19. Complex sparse spatial filter for decoding mixed frequency and phase coded steady-state visually evoked potentials.

    Science.gov (United States)

    Morikawa, Naoki; Tanaka, Toshihisa; Islam, Md Rabiul

    2018-07-01

    Mixed frequency and phase coding (FPC) can achieve the significant increase of the number of commands in steady-state visual evoked potential-based brain-computer interface (SSVEP-BCI). However, the inconsistent phases of the SSVEP over channels in a trial and the existence of non-contributing channels due to noise effects can decrease accurate detection of stimulus frequency. We propose a novel command detection method based on a complex sparse spatial filter (CSSF) by solving ℓ 1 - and ℓ 2,1 -regularization problems for a mixed-coded SSVEP-BCI. In particular, ℓ 2,1 -regularization (aka group sparsification) can lead to the rejection of electrodes that are not contributing to the SSVEP detection. A calibration data based canonical correlation analysis (CCA) and CSSF with ℓ 1 - and ℓ 2,1 -regularization cases were demonstrated for a 16-target stimuli with eleven subjects. The results of statistical test suggest that the proposed method with ℓ 1 - and ℓ 2,1 -regularization significantly achieved the highest ITR. The proposed approaches do not need any reference signals, automatically select prominent channels, and reduce the computational cost compared to the other mixed frequency-phase coding (FPC)-based BCIs. The experimental results suggested that the proposed method can be usable implementing BCI effectively with reduce visual fatigue. Copyright © 2018 Elsevier B.V. All rights reserved.

  20. Data-mining analysis of the provision of mobility devices in the United States with emphasis on complex rehab technology.

    Science.gov (United States)

    Sprigle, Stephen; Johnson Taylor, Susan

    2017-11-28

    The objective of this study was to describe the provision of wheeled-mobility equipment from the perspective of a large equipment supplier in the United States. The records of clients who were prescribed a mobility device over a 6-month period were randomly sampled to product a dataset of 1,689 clients. Analysis was limited to descriptive statistics and measures of relationships. The majority of the clients were adults (72%) and female (58%) with 62% receiving a manual wheelchair. The majority of interventions (58%) included some contribution from the client or client's family. Overall, 86% of all prescribed wheelchairs were classified as complex rehab technology (CRT). About half (52%) of all interventions involved a therapist. Therapist involvement was 2.5 times more likely during CRT interventions compared to standard durable medical equipment (StdDME). The project provides a novel description of mobility-related equipment provision using a large retrospective dataset. The analysis demonstrates the utility of analyzing a large number of client interventions. The capabilities of such analyses have business, clinical, and policy implications. Combining the data available from suppliers with prospective collection of client-specific information, such as outcomes, would be a more powerful means to assess the provision of wheeled-mobility equipment.

  1. Gastrintestinal helminths Of Cerdocyon thous (Linnaeus, 1766 -Smith, 1839 from the caatinga area of the Paraíba State, Brazil

    Directory of Open Access Journals (Sweden)

    Roberto César Lima

    2013-12-01

    Full Text Available The crab eating fox, Cerdocyon thous (Linnaeus, 1766 – Smith, 1839, is a medium sized canid which is found in almost every region of Brazil. It is the only registered native canid specie to be found in the semi-arid Northeastern region of the country. This study had as its objectives: the identification of the helminth fauna common to Cerdocyon thous found in the Caatinga of the state of Paraíba; and the determination of the ecological indications of helminthic infection, hoping to make a favourable addition to the understanding of this little known biome. In this study, 58 animals that were found as ‘roadkill’ on the highways in the municipality of Patos were used. The gastrointestinal helminths from these animals were colected. All the animals in this study were infected with helminths. 16 species of helminths were identified, two being trematodes, one being a cestode, one being an acanthocephalus, and the remaining twelve being nematodes. In this study a new specie, named Pterygodermatites pluripectinata n. sp. Was discovered and its host and location described.

  2. Anthelmintic efficacy of pumpkin seed (Cucurbita pepo Linnaeus, 1753) on ostrich gastrointestinal nematodes in a semiarid region of Paraíba State, Brazil.

    Science.gov (United States)

    Feitosa, Thais Ferreira; Vilela, Vinícius Longo Ribeiro; Athayde, Ana Célia Rodrigues; Braga, Fábio Ribeiro; Dantas, Elaine Silva; Vieira, Vanessa Diniz; de Melo, Lídio Ricardo Bezerra

    2013-01-01

    The aim of this study was to verify the in vivo effectiveness of pumpkin seed (Curcubita pepo Linnaeus, 1753) in naturally infected ostriches in the Cariri zone, semiarid region of Paraíba State, Brazil. Forty-eight ostriches were used, African Black breed, of 14 to 36 months old, naturally infected by gastrointestinal nematodes. These animals were divided into four groups of 12 ostriches. Group 1 consists of animals treated with 0.5 g/kg live weight (l. w.) of pumpkin seed meal; group 2 received 1 g/kg l. w. of pumpkin seed meal; group 3 was treated with Albendazole 5 %, at the dosage of 1 mL/10 kg l. w.; and Group 4 was the control group and do not received treatment. Groups 1 and 2 received the treatment for three consecutive days, orally, at intervals of 7 days, totaling nine administrations. The Albendazole 5 % was administered one time, at the beginning of the experiment, according to the manufacturer's recommendations. The groups treated with pumpkin seed showed a significant decrease in egg counts per gram of feces (EPG), wherein group 2 (1 g/kg l. w.) was the most effective. The control and drug groups showed no reduction in EPG. The results of the present study demonstrate that the administration of pumpkin seed was effective in controlling gastrointestinal helminths in naturally infected ostriches.

  3. Factors Affecting the Efficiency of Excited-States Interactions of Complexes between Some Visible Light-Emitting Lanthanide Ions and Cyclophanes Containing Spirobiindanol Phosphonates

    Directory of Open Access Journals (Sweden)

    M. S. Attia

    2007-01-01

    Full Text Available The efficiency of excited-states interactions between lanthanide ions Tb3+ and Eu3+ and some new cyclophanes (I, II, and III has been studied in different media. High luminescence quantum yield values for terbium and europium complexes in DMSO and PMMA were obtained. The photophysical properties of the green and red emissive Tb3+ and Eu3+ complexes have been elucidated, respectively.

  4. The orbital ground state of the azide-substrate complex of human heme oxygenase is an indicator of distal H-bonding: Implications for the enzyme mechanism‡

    Science.gov (United States)

    Ogura, Hiroshi; Evans, John P.; Peng, Dungeng; Satterlee, James D.; de Montellano, Paul R. Ortiz; Mar, Gerd N. La

    2009-01-01

    The active site electronic structure of the azide complex of substrate-bound human heme oxygenase-1, (hHO) has been investigated by 1H NMR spectroscopy to shed light on the orbital/spin ground state as an indicator of the unique distal pocket environment of the enzyme. 2D 1H NMR assignments of the substrate and substrate-contact residue signals reveal a pattern of substrate methyl contact shifts, that places the lone iron π-spin in the dxz orbital, rather than the dyz orbital found in the cyanide complex. Comparison of iron spin relaxivity, magnetic anisotropy and magnetic susceptibilities argues for a low-spin, (dxy)2(dyz,dxz)3, ground state in both azide and cyanide complexes. The switch from singly-occupied dyz for the cyanide to dxz for the azide complex of hHO is shown to be consistent with the orbital hole determined by the azide π-plane in the latter complex, which is ∼90° in-plane rotated from that of the imidazole π-plane. The induction of the altered orbital ground state in the azide relative to the cyanide hHO complex, as well as the mean low-field bias of methyl hyperfine shifts and their paramagnetic relaxivity relative to those in globins, indicate that azide exerts a stronger ligand field in hHO than in the globins, or that the distal H-bonding to azide is weaker in hHO than in globins. The Asp140 → Ala hHO mutant that abolishes activity retains the unusual WT azide complex spin/orbital ground state. The relevance of our findings for other HO complexes and the HO mechanism is discussed. PMID:19243105

  5. The orbital ground state of the azide-substrate complex of human heme oxygenase is an indicator of distal H-bonding: implications for the enzyme mechanism.

    Science.gov (United States)

    Ogura, Hiroshi; Evans, John P; Peng, Dungeng; Satterlee, James D; Ortiz de Montellano, Paul R; La Mar, Gerd N

    2009-04-14

    The active site electronic structure of the azide complex of substrate-bound human heme oxygenase 1 (hHO) has been investigated by (1)H NMR spectroscopy to shed light on the orbital/spin ground state as an indicator of the unique distal pocket environment of the enzyme. Two-dimensional (1)H NMR assignments of the substrate and substrate-contact residue signals reveal a pattern of substrate methyl contact shifts that places the lone iron pi-spin in the d(xz) orbital, rather than the d(yz) orbital found in the cyanide complex. Comparison of iron spin relaxivity, magnetic anisotropy, and magnetic susceptibilities argues for a low-spin, (d(xy))(2)(d(yz),d(xz))(3), ground state in both azide and cyanide complexes. The switch from singly occupied d(yz) for the cyanide to d(xz) for the azide complex of hHO is shown to be consistent with the orbital hole determined by the azide pi-plane in the latter complex, which is approximately 90 degrees in-plane rotated from that of the imidazole pi-plane. The induction of the altered orbital ground state in the azide relative to the cyanide hHO complex, as well as the mean low-field bias of methyl hyperfine shifts and their paramagnetic relaxivity relative to those in globins, indicates that azide exerts a stronger ligand field in hHO than in the globins, or that the distal H-bonding to azide is weaker in hHO than in globins. The Asp140 --> Ala hHO mutant that abolishes activity retains the unusual WT azide complex spin/orbital ground state. The relevance of our findings for other HO complexes and the HO mechanism is discussed.

  6. Spin state of mixed crystals of iron with zinc or cobalt for the assembled complexes bridged by 1,3-bis(4-pyridyl)propanes

    Energy Technology Data Exchange (ETDEWEB)

    Nakashima, S [Natural Science Center for Basic Research and Development, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526 (Japan); Dote, T; Atsuchi, M; Inoue, K, E-mail: snaka@hiroshima-u.ac.j [Graduate School of Science, Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526 (Japan)

    2010-03-01

    Mixed crystals, [Fe{sub 1-x}M{sub x}(NCX){sub 2}(bpp){sub 2}] (M=Zn, Co; X=S, Se; bpp1,3-bis(4-pyridyl)propane), had a similar structure with 2D interpenetrated structure of [Fe(NCX){sub 2}(bpp){sub 2}]. The proportion of Fe{sup II} low-spin state in the mixed crystals of NCSe complex increased compared with that of the corresponding Fe complex, while such change in the Moessbauer spectra was not observed in the NCS complex.

  7. Enhanced detection of explosives by turn-on resonance Raman upon host-guest complexation in solution and the solid state

    DEFF Research Database (Denmark)

    Witlicki, Edward H.; Bähring, Steffen; Johnsen, Carsten

    2017-01-01

    complexation occur via a mechanism of resonance between the 785 nm laser line and the strongly absorbing charge-transfer chromophore arising from the complex between electron-donating TTF-C[4]P and electron-accepting nitroaromatic explosives. The addition of chloride forms the Cl-·TTF-C[4]P complex resetting......The recognition of nitroaromatic explosives by a tetrakis-tetrathiafulvalene-calix[4]pyrrole receptor (TTF-C[4]P) yields a "turn on" and fingerprinting response in the resonance Raman scattering observed in solution and the solid state. Intensity changes in nitro vibrations with analyte...

  8. Zoneamento agroecológico do município de Lagoa Seca, PB Agroecological zoning of the municipal district of Lagoa Seca, Paraíba State

    Directory of Open Access Journals (Sweden)

    Íris do S. Barbosa

    2009-10-01

    Full Text Available Visa-se, cinzelar, neste estudo um zoneamento em que se considerem os aspectos agrícolas, ecológicos e sociais inerentes ao município de Lagoa Seca, PB, elaborado através da análise dos vários cenários apresentados na área. O uso de um conjunto de recursos, como fotointerpretação, processamento de imagens georreferenciadas, posicionamento por satélites, associados à teoria sistêmica de Bertrand, possibilitou a identificação, delimitação e análise das áreas de uso antrópico, agrícola e das áreas com remanescentes vegetais significativos, que caracterizam o município. Foram elaborados para a área em estudo, arquivos digitais georreferenciados, relativos aos temas: limite municipal, áreas urbanizadas, infra-estrutura viária, rede de drenagem, altimetria, cobertura vegetal natural, uso agrícola do solo e zoneamento. Os resultados obtidos evidenciaram que o município apresenta quatro regiões com aspectos distintos, as quais foram identificadas como regiões agroecológicas, de acordo com o fator que mais se destacou em cada área.This work sought to perfect zoning which concerns the agricultural, ecological and social aspects in the municipality of Lagoa Seca in the State of Paraíba through the study of several scenarios in that area. It consisted of a set of approaches such as photo interpretation, geo-referenced image processing, and satellite positioning associated with Bertrand's Systemic Theory that allowed the identification, delimitation and analysis of areas of anthropic and agricultural usage as well as of those with remaining significant vegetation, which characterize the municipality. Digital geo-referenced files were elaborated for the studied area comprising basic data about the municipal limit, urbanized areas, road systems, drainage system, altimetry, cover of natural vegetation, soil farming usage and zoning of agroecological regions. The study showed that the municipality of Lagoa Seca has four regions

  9. Fatores de risco para a mortalidade perinatal no Recife, Pernambuco, Brasil, 2003 Risk factors for perinatal mortality in Recife, Pernambuco State, Brazil, 2003

    Directory of Open Access Journals (Sweden)

    Terezinha de Almeida Aquino

    2007-12-01

    Full Text Available Foi realizado estudo caso-controle com o objetivo de analisar os fatores de risco associados à mortalidade perinatal no Recife, Pernambuco, Brasil, 2003, de acordo com um modelo hierarquizado de determinantes proximais, intermediários e distais. Foram considerados casos os óbitos perinatais com peso ao nascer igual ou superior a 500g, de gravidez única e não portador de anencefalia. Os controles foram os nascidos vivos entre 26 de dezembro de 2002 e 31 de dezembro de 2003, que não evoluíram para o óbito até seis dias completos de vida, com as mesmas características dos casos. Com o linkage entre o banco de dados do Sistema de Informações sobre Nascidos Vivos e o de óbitos perinatais, obtiveram-se 403 casos e 1.612 controles. Após regressão logística múltipla, com a inclusão de variáveis dos três níveis de determinação, constituíram-se fatores de risco para mortalidade perinatal: a prematuridade (OR = 18,23, o baixo peso ao nascer (OR = 4,90, a idade da mãe igual a ou maior que 35 anos (OR = 1,97, o nascimento em hospitais participantes do Sistema Único de Saúde (OR = 1,93 e a escolaridade da mãe inferior a quatro anos de estudo (OR = 1,78.The aim of this study was to identify and analyze risk factors for perinatal mortality in Recife, Pernambuco State, Brazil, in 2003, using a multilevel hierarchical model. In this case-control study, cases consisted of all perinatal deaths in 2003 in singleton infants with birth weight > 500g and without congenital malformations. The controls were live births from December 26, 2002, to December 31, 2003, with the same characteristics as the study group, but who survived > 6 days. By using record linkage techniques, 403 cases and 1,612 controls were obtained. All variables, when submitted jointly to multiple logistic regression, showed statistical significance in decreasing order of risk, as follows: prematurity (OR = 18.23, low birth weight (OR = 4.90, maternal age > 35 (OR = 1

  10. Photoisomerization Mechanism of Ruthenium Sulfoxide Complexes: Role of the Metal-Centered Excited State in the Bond Rupture and Bond Construction Processes.

    Science.gov (United States)

    Li, Huifang; Zhang, Lisheng; Zheng, Lvyin; Li, Xun; Fan, Xiaolin; Zhao, Yi

    2016-09-26

    Phototriggered intramolecular isomerization in a series of ruthenium sulfoxide complexes, [Ru(L)(tpy)(DMSO)](n+) (where tpy=2,2':6',2''-terpyridine; DMSO=dimethyl sulfoxide; L=2,2'-bipyridine (bpy), n=2; N,N,N',N'-tetramethylethylenediamine (tmen) n=2; picolinate (pic), n=1; acetylacetonate (acac), n=1; oxalate (ox), n=0; malonate (mal), n=0), was investigated theoretically. It is observed that the metal-centered ligand field ((3) MC) state plays an important role in the excited state S→O isomerization of the coordinated DMSO ligand. If the population of (3) MCS state is thermally accessible and no (3) MCO can be populated from this state, photoisomerization will be turned off because the (3) MCS excited state is expected to lead to fast radiationless decay back to the original (1) GSS ground state or photodecomposition along the Ru(2+) -S stretching coordinate. On the contrary, if the population of (3) MCS (or (3) MCO ) state is inaccessible, photoinduced S→O isomerization can proceed adiabatically on the potential energy surface of the metal-to-ligand charge transfer excited states ((3) MLCTS →(3) MLCTO ). It is hoped that these results can provide valuable information for the excited state isomerization in photochromic d(6) transition-metal complexes, which is both experimentally and intellectually challenging as a field of study. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  11. Geochronological data for lithostratigraphic complexes of a crystalline basement from the South regions of Minas Gerais and adjacent areas of the Sao Paulo state

    International Nuclear Information System (INIS)

    Kawashita, K.; Artur, A.C.; Wernick, E.

    1988-01-01

    New geochronological data (Rb/Sr, Pb/Pb) for the Amparo and Pinhal Complexes, southern State of Minas Gerais and adjacent areas of the State of Sao Paulo are presented and discussed with respect to other lithostratigraphic complexes which there occur. Among the different complexes considered, 4 are composed mainly by rock belonging to typical infrastructure associations. They are the Barcelona, the Guaxupe, the Amparo and the Pinhal complexes. The Barbacena Complex is a typical gray gneiss complex and geochronological data by different methods confirm its Archean age. The Guaxupe Complex is composed mainly by different types of charnockitic rocks and an Archean age is assumed on geotectonic basis due to its neighboring association with the gray gneiss/greenstone belt, a though confirming geochronological data are still missing, a normal feature in this type of mobile belts which generally show a complex, polycyling evolution. Geochronological data by different methods on diverse rock types indicates that the Amparo and Pinhal complexes are respectively of Lower an Upper proterozoic age. Geochronological, geological and petrographic data reveal that both complexes are composed mainly by 3 basic rock associations: a-mainly derived magmatic rocks including mafic/ultramafic ones as well as calc-alkaline, subalcaline and even alkaline granitoids; b-orthogneisses, migmatites and crustal granites derived by metamorphic processes acting on older, pre-existing rocks; corthogneisses and migmatites resulting from metamorphic processes acting on magmatic rocks intruded during the same tecto-metamorphic cycle during which its transformation took place. The results suggest a polycyclic evolution by successive tecto-metamorphic events which affected the older rocks of the considered are either by the reworking of enclosing rocks around pericratonic continental main magmatic arcs or by the remobilisation of older basement rocks during continental collisions. (author) [pt

  12. Solid-state thermolysis of a fac-rhenium(I) carbonyl complex with a redox non-innocent pincer ligand.

    Science.gov (United States)

    Jurca, Titel; Chen, Wen-Ching; Michel, Sheila; Korobkov, Ilia; Ong, Tiow-Gan; Richeson, Darrin S

    2013-03-25

    The development of rhenium(I) chemistry has been restricted by the limited structural and electronic variability of the common pseudo-octahedral products fac-[ReX(CO)3L2] (L2 = α-diimine). We address this constraint by first preparing the bidentate bis(imino)pyridine complexes [(2,6-{2,6-Me2C6H3N=CPh}2C5H3N)Re(CO)3X] (X = Cl 2, Br 3), which were characterized by spectroscopic and X-ray crystallographic means, and then converting these species into tridentate pincer ligand compounds, [(2,6-{2,6-Me2C6H3N=CPh}2C5H3N)Re(CO)2X] (X = Cl 4, Br 5). This transformation was performed in the solid-state by controlled heating of 2 or 3 above 200 °C in a tube furnace under a flow of nitrogen gas, giving excellent yields (≥95 %). Compounds 4 and 5 define a new coordination environment for rhenium(I) carbonyl chemistry where the metal center is supported by a planar, tridentate pincer-coordinated bis(imino)pyridine ligand. The basic photophysical features of these compounds show significant elaboration in both number and intensity of the d-π* transitions observed in the UV/Vis spec tra relative to the bidentate starting materials, and these spectra were analyzed using time-dependent DFT computations. The redox nature of the bis(imino)pyridine ligand in compounds 2 and 4 was examined by electrochemical analysis, which showed two ligand reduction events and demonstrated that the ligand reduction shifts to a more positive potential when going from bidentate 2 to tridentate 4 (+160 mV for the first reduction step and +90 mV for the second). These observations indicate an increase in electrostatic stabilization of the reduced ligand in the tridentate conformation. Elaboration on this synthetic methodology documented its generality through the preparation of the pseudo-octahedral rhenium(I) triflate complex [(2,6-{2,6-Me2C6H3N=CPh}2C5H3N)Re(CO)2OTf] (7, 93 % yield). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  13. Rendimento de cultivares de tomate para processamento em Goias Yield of processing tomato cultivars in Goiás State, Brazil

    Directory of Open Access Journals (Sweden)

    Nei Peixoto

    1999-03-01

    Full Text Available Seis ensaios de competição de cultivares de tomate para processamento industrial foram conduzidos nos municípios goianos de Anápolis, Jataí, Porangatú e Santa Isabel, em 1990, e Anápolis e Porangatu, em 1991. O delineamento experimental utilizado foi de blocos casualizados com quatro repetições, tendo as parcelas 80 plantas em 1990 e 70 em 1991. Em Porangatu, em 1990, as plantas foram mais precoces, florescendo 35 e 41 dias após a semeadura e iniciando-se a colheita 38 dias após a antese. Em Anápolis, também em 1990, a floração iniciou-se de 54 a 60 dias após a semeadura e, a colheita, 46 dias após a antese. As cultivares Petomech, IPA 6 e Topmech Melhorado destacaram-se entre as mais produtivas, apresentando frutos firmes, seguidas das cultivares IPA 5 e Agrocica 72. As cultivares Roma VFN, Rossol e Agrocica 08, por outro lado, revelaram-se produtivas, mas com frutos pouco firmes, sendo impróprias para o transporte a longa distância. Com exceção da cultivar Itaparica, que apresentou melhor desempenho relativo nos ambientes menos favoráveis, os genótipos apresentaram, para rendimento, resposta diretamente proporcional à melhoria do ambiente, caracterizado pela média geral dos genótipos dentro de cada experimento. As cultivares Agrocica 08, IPA 5, Nemadoro e UC 204, foram as mais influenciadas pelas variações do ambiente, enquanto as cultivares Agrocica 33, Calmec VF, IPA 6, Rio Fuego, Santa Adélia, Topmec Melhorado e UC 82 foram as mais estáveis.Six field trials were carried out to evaluate processing tomato cultivars in four counties in the State of Goiás, Brazil (Anápolis, Jataí, Porangatú and Santa Isabel, in 1990, and Anápolis and Porangatu, in 1991. The experiment was conducted as a randomized block design, with four replications, and plots of 80 plants in 1990 and 70 plants in 1991. The plant cycle was shorter in Porangatu (1990, where temperatures were higher than Anápolis. In Porangatu, plant flowering

  14. Complexo enzimático para suínos: digestão, metabolismo, desempenho e impacto ambiental Enzyme complex for swine: nutrient digestion, metabolism, performance and environmental impact

    Directory of Open Access Journals (Sweden)

    Urbano dos Santos Ruiz

    2008-03-01

    Full Text Available Foram conduzidos dois experimentos para avaliar a suplementação enzimática (amilase, pentosanase, celulase, protease e a-galactosidase em rações à base de milho e farelo de soja para suínos. No Exp 1, foram determinadas as digestibilidades aparentes da energia, matéria seca, proteína e das fibras das rações, com ou sem o complexo enzimático, para suínos machos castrados, com 19,96 ± 2,90 kg de peso vivo. Foi utilizado o método da coleta total de fezes e as rações foram formuladas com níveis reduzidos de energia, proteína e aminoácidos. No Exp 2, foram mensurados o desempenho, a excreção de sólidos totais e voláteis, matéria mineral, nitrogênio, macro e microminerais nas fezes, em relação ao desempenho, de suínos machos castrados dos 50 aos 151 dias de idade, com peso médio inicial de 18,34 ± 1,35 kg. Foram utilizadas três dietas, sendo uma ração formulada para atender ou exceder as exigências nutricionais dos animais, de acordo com o NRC (1998, e outras duas com níveis reduzidos de energia, proteína e aminoácidos, suplementadas ou não com o complexo enzimático. Foi utilizado o delineamento em blocos casualizados. A suplementação enzimática em rações contendo milho e farelo de soja não promoveu incrementos na digestibilidade de nutrientes, não melhorou o desempenho dos animais e também não reduziu a excreção de resíduos pelas fezes. Mais estudos são necessários para testar novas matrizes e diferentes níveis do complexo enzimático.Two experiments were conducted to evaluate dietary enzyme supplementation (amylase, pentosanase, celulase and a-galactosidase in corn-soy diets for swine. In the Exp 1, the apparent digestibilities of energy, dry matter, protein and fibers of the feeds were determined, using a nutritional matrix with or without enzyme supplementation for barrows with 19.96 ± 2.90 kg body weight. The total feces collection method was used and the diets were formulated with reduced

  15. Reported exposure to trauma among adult patients referred for psychological services at the Free State Psychiatric Complex, Bloemfontein

    Directory of Open Access Journals (Sweden)

    Laurisa van Zyl

    2017-10-01

    Objective: The study aimed to explore and describe the extent and nature of reported potentially traumatic events and associated variables in adult patients referred for psychological services at the Free State Psychiatric Complex (FSPC, Bloemfontein. Methods: In this cross-sectional study, demographic information, diagnostic morbidity and co-morbidity, and presence and type of reported trauma exposure reported by patients during the initial assessment were obtained from files of adult patients seen during a one-year period (2010 at the out-patient unit and the in-patient affective ward at the FSPC. Data were captured on data record forms by the researchers and analysed by means of descriptive statistics, univariate analysis and logistic regression (SAS version 9.1. Results: Of the 192 adults (71.9% White and 67.2% female referred for psychological services,75.5% were diagnosed with mood disorders, 17.2% with anxiety disorders, 22.4% with substance-related disorders and 20.9% with cluster B personality disorders or traits. A total of 145 (75.5% reported past trauma exposure. The most frequently reported types of trauma exposure were traumatic death/injury of a loved one (37.0%, physical assault (24.5%, witnessed/threatened violence (19.3%, and sexual assault (17.7%. Women were more likely to have been exposed to trauma than men (OR 4.02, 95% CI 1.87–8.62, in particular to traumatic death of a loved one (OR 3.13, physical assault (OR 4.08, or sexual assault (OR 5.43. Conclusions: The findings of this study contribute to current data regarding the prevalence of exposure to trauma and its possible association with mental illness. The importance of comprehensive trauma exposure screening in routine psychiatric interviewing practices is highlighted.

  16. Complex landslides in the Trans-Mexican Volcanic Belt - a case study in the State of Veracruz

    Science.gov (United States)

    Wilde, M.; Terhorst, B.; Schwindt, D.; Rodriguez Elizarrarás, S. R.; Morales Barrera, W. V.; Bücker, M.; Flores Orozco, A.; García García, E.; Pita de la Paz, C.

    2017-12-01

    The State of Veracruz (Mexico) is a region which is highly affected by landslides, therefore detailed studies on triggering factors and process dynamics of landslides are required. Profound insights are essential for further hazard assessments and compilation of susceptibility maps. Exemplary landslide sites were investigated in order to determine characteristic features of specific regions. In the Chiconquiaco Mountain Range numerous damaging landslide events occurred in the year of 2013 and our case study corresponds to a deep-seated landslide originating from this slide-intensive year. The main scientific aspects are placed on the reconstruction of the landslides geometry and its process dynamics. Therefore, surface and subsurface analysis form the base of a multimethodological approach. In order to perform surface analysis, aerial photographs were collected by an unmanned aerial vehicle (UAV) aiming at the generation of a 3D model with the Structure from Motion (SfM) work routine. Ground control points (GCP) were used to ensure the geometric accuracy of the model. The obtained DEM of the 2013 slide mass as well as an elevation model representing the topographic situation before the event (year 2011) were used to detect surface changes. The data enabled determination of the most affected areas as well as areas characterized by secondary movements. Furthermore, the volume of the slide mass could be calculated. Geophysical methods, as electrical resistivity tomography (ERT) as well as seismic refraction tomography (SRT), were applied for subsurface analysis. Differences in subsurface composition, respectively density, allowed for separation of the slide mass and the underlying unit. Most relevant for our studies is the detection of an earlier landslide leading to the assumption that the 2013 landslide event corresponds to a reactivation process. This multimethodological approach enables a far-reaching visualization of complex landslides and strongly supports the

  17. Pesquisando a partir do pensamento complexo: elementos para uma metodologia de desenvolvimento eco-sistêmico = Researching from the complex thought elements for an ecosystemic development methodology

    Directory of Open Access Journals (Sweden)

    Moraes, Maria Cândida

    2006-01-01

    Full Text Available O artigo aporta algumas idéias de como é possível encarar a pesquisa em Educação, a partir do Pensamento Complexo de Edgar Morin, bem como do que estamos chamado de Pensamento Eco-Sistêmico elaborado por M. C. Moraes. Para tanto, os autores propõem a metodologia de desenvolvimento eco-sistêmico, suportada por determinados princípios epistemológicos e compreendida como sendo um processo de construção do conhecimento, no qual se retomam, em diferentes momentos e de maneira interativa e recursiva, os objetivos, as estratégias e as avaliações feitas, visando melhor compreender a dinâmica processual e as mudanças ocorridas. Implica um procedimento metodológico interativo, dinâmico, aberto e recursivo, caracterizado pela construção de estratégias de ação, estratégias adaptavéis e sujeitas às mudanças no processo e que sendo desenvolvidas durante a pesquisa estão também sujeitas ao imprevisto e ao inesperado, requerendo, portanto, pluralidade de amostras e de instrumentos, bem como uma melhor compreensão dos resultados. São estratégias que avançam mediante momentos e circunstâncias criadas, diferentemente das etapas e estágios regulares, ordenados e previsíveis, que caracterizam a pesquisa tradicional. O rigor e a validade científica dos conhecimentos científicos construídos a partir deste referencial devem ser avaliados a partir das evidências identificadas, da utilidade do conhecimento produzido, da probabilidade de polinização dos resultados em outros contextos, da confirmabilidade dos processos registrados, bem como do caráter ético dos procedimentos adotados

  18. Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III chloride complexes with a heterocyclic Schiff base ligand

    Directory of Open Access Journals (Sweden)

    K. Mohanan

    2016-07-01

    Full Text Available Condensation of 2-hydroxy-1-naphthaldehyde with 2-amino-3-carboxyethyl-4,5-dimethylthiophene in 1:1 molar ratio, yielded a potentially tridentate Schiff base viz. 2-[N-(2′-hydroxy-1-naphthylideneamino]-3-carboxyethyl-4,5-dimethylthiophene (HNAT. This ligand formed complexes with lanthanum(III, cerium(III, praseodymium(III, neodymium(III, samarium(III, europium(III and gadolinium(III chloride under well defined conditions. These complexes were characterized through elemental analysis, molar conductance, magnetic moment measurements, IR, UV–Vis, FAB mass and 1H NMR spectral studies. Analytical data showed that all the metal complexes exhibited 1:1 metal–ligand ratio. Molar conductance values adequately confirmed the non-electrolytic nature of the metal complexes. The proton NMR spectral observations supplement the IR spectral assignments. The spectral data revealed that the ligand acted as neutral tridentate, coordinating to the metal ion through azomethine nitrogen, ester carbonyl and naphtholate oxygen without deprotonation. The ligand and its lanthanum(III chloride complex were subjected to XRD studies. The lanthanum(III chloride complex has undergone a facile transesterification reaction. The solid state d.c. electrical conductivity of some selected complexes were measured as a function of temperature, indicating the semiconducting nature of the metal complexes. The antimicrobial activities were examined by disk diffusion method against some pathogenic bacterial and fungal species.

  19. Regiões homogêneas e tamanho de amostra para atributos do clima no Estado de São Paulo, Brasil Homogeneous regions and sample size for attributes of the climate in São Paulo State, Brazil

    Directory of Open Access Journals (Sweden)

    Thomas Newton Martin

    2008-06-01

    Full Text Available Os objetivos deste trabalho foram demarcar regiões homogêneas e estimar o número de anos de avaliações para as variáveis insolação, radiação solar global e radiação fotossinteticamente ativa para o Estado de São Paulo. Utilizaram-se dados da média mensal de insolação, radiação solar e radiação fotossinteticamente ativa de 18 locais do Estado de São Paulo. A homogeneidade das variâncias entre os meses do ano para os 18 locais (variabilidade temporal e a homogeneidade das variâncias entre os locais em cada mês (variabilidade espacial foram testadas pelo teste de homogeneidade de Bartlett. Estimou-se o tamanho de amostra para cada local durante o ano. Como resultados há variabilidade temporal e espacial para as estimativas de insolação, radiação solar e radiação fotossinteticamente ativa para os 18 municípios avaliados. Além disso, a variabilidade do tamanho de amostra para a insolação, radiação solar e radiação fotossinteticamente ativa depende do local e da época do ano no Estado de São Paulo.The purpose of this study was to separate homogeneous regions and to estimate the numbers of years necessary to evaluate the variables: sunshine, global solar radiation and photossintetically active radiation in Sao Paulo State. Monthly data of sunshine, solar radiation and photossintetically active radiation for 18 places in Sao Paulo State were used in the analysis. The homogeneity of the variances among the months for the 18 places (seasonal variability and the homogeneity of variances among places in each month (spatial variability were tested by the test of homogeneity of Bartlett. In addition, the sample size for each place was calculated during the year. The results show the existence of seasonal and spatial variability in the estimates of sunshine, solar radiation and photossintetically active radiation for the 18 cities evaluated in Sao Paulo State. Moreover, the variability of the sample size for sunshine

  20. Gestão curricular científica: uma abordagem simplista para um fenómeno complexo - Scientific curricular management: a simple approach on a complex phenomenon

    Directory of Open Access Journals (Sweden)

    João M. Paraskeva

    2011-03-01

    ; history of education; United States of America   GESTIÓN CURRICULAR CIENTÍFICA: UN ABORDAJE SIMPLISTA PARA UN FENÔMENO COMPLEJO Resumen Este texto tiene como objetivo hacer una análise de la construcción histórico- social del currículo, teniendo como foco principalmente los Estados Unidos de América. Analiza y cuestiona sus metamorfosis principalmente en el siglo pasado y la conversión del mismo en un mecanismo de referencia de la eficiencia social. De modo que, los apologistas de la "eficiencia social" perante un instrumento social y cultural como es el caso del currículo, optan por soluciones simplistas ignorando que tenían en manos un utensilio peligroso, castrador de tantos presentes y futuros a millares y millares de generaciones. Es en este sentido que entendemos que el currículo en las manos de los "social efficiency educators" se convirtió en un arma letal construida con base en la linealidad de los argumentos que infelizmente fueron consiguiendo imponer y que muchos de ellos se encuentran aún incrustados en las vísceras curriculares de este inicio de siglo. Palabras-clave: currículo, historia de la educación, Estados Unidos de América.   GESTION SCIENTIFIQUE DU CURSUS : UNE ABORDAGE SIMPLISTE POUR UM PHÉNOMÈNE COMPLEXE Résumé Ce texte a le but de faire une analyse de la construction historique social du cursus, qui a comme foyer surtout lês Etats Unis d'Amérique. Il analyse e il questionne ses métamorphoses surtout au siècle dernier et as conversion en un mécanisme de référence de l'efficacité social. De cette façon, les apologistes de "l'efficacité social", devant un instrument social et culturel comme le cursus, choisissent des solutions simplistes, em ignorant qu'ils avaient en mains un outil dangereux, châtreur d'autant des présents et des futurs à milliers et milliers de gérations. C'est dans ce sens que nous comprenons que le cursus entre les mains des "social efficiency educators" si transformé en une arme l

  1. Comparison of Escherichia coli tRNAPhe in the free state, in the ternary complex and in the ribosomal A and P sites by chemical probing

    DEFF Research Database (Denmark)

    Douthwaite, S; Garrett, R A; Wagner, R

    1983-01-01

    tRNAPheE.coli was modified at accessible guanosine, cytidine, and adenosine residues using the chemical modification method described by Peattie and Gilbert [Proc. Natl Acad. Sci. USA, 77, 4679-4689 (1980)]. Modification characteristics of the tRNA in the free state, in the ternary complex...

  2. Generation of fluorescence quenchers from the triplet states of chlorophylls in the major light-harvesting complex II from green plants

    NARCIS (Netherlands)

    Barzda, V.; Vengris, M.; Valkunas, L.; van Amerongen, H.; van Grondelle, R.

    2000-01-01

    Laser flash-induced changes of the fluorescence yield were studied in aggregates of light-harvesting complex II (LHCII) on a time scale ranging from microseconds to seconds. Carotenoid (Car) and chlorophyll (Chl) triplet states, decaying with lifetimes of several microseconds and hundreds of

  3. Ethnobotanical study of useful vegetal species in two rural communities in the semi-arid region of Paraíba state (Northeastern Brazil.

    Directory of Open Access Journals (Sweden)

    Cleilton Marques Alves

    2014-04-01

    Full Text Available Trying to understand the relationship between man/natural resources, from ethonobotanical studies, this study aimed to estimate the use value of vegetal species in two Caatinga areas in the Cariri of Paraíba state, besides knowing the multiple uses of plants by the residents of rural communities of Brito (Queimadas - PB and Lagoa Salgada (Montadas, Areial, Pocinhos - PB. Semi-structured interviews were conducted with local specialists and the community. It was used by the specialists the technique “snow ball” and the technique “guided tour”. It was identified 77 species, being 40 in Brito community and 37 in Lagoa Salgada community, all of them distributed into use categories, since food up to technological uses. Seven species had the higher use value: 1: Croton blanchetianus, Mimosa caesalpinefolia, Prosopis julifora, Mimosa tenuiflora, Opuntia ficus-indica, Aspidosperma pyrifolium and Myracrodruon urundeuva. The used categories were equal between the two communities and among the general informants and local specialists, which show great resemblance of use and their preference for certain species. The lowest cited species were those for food and domestic building purposes, and the most used were those ones for medicinal use. The most cited species are Cactaceae, Euphorbiaceae and Fabaceae. Regarding the species, the most valued in both communities were Croton blanchetianus, Pilosocereus gounellei, Mimosa tenuiflora and Prosopis julifora.  Although the current communities have a great dependence of the local flora for surviving, the extraction and the lack of conservation of species are notorious in both communities.

  4. Implementation of the Inter-disciplinary research complex in the L.N. Gumilev Eurasian State University is the step to a modern knowledge intensive technologies

    International Nuclear Information System (INIS)

    Shkol'nik, V.S.; Zholdasbekov, M.Zh.; Kadyrzhanov, K.K.; Itkis, M.G.; Dmitriev, S.N.

    2003-01-01

    In the book the rationale for the Inter-disciplinary research complex implementation in the L.N. Gumilev Eurasian State University (Astana city, Kazakhstan) is given. The design of key facility of the complex - the heavy ion accelerator (DC-60) is described. Application of nuclear membranes as an integrating factor for development of a new technologies, science and a knowledge intensive business is discussed. In these concerns the problems of an industrial technologies development with use of the nano- and microstructures on the nuclear membranes base are considered. The items of the scientific environment formation on the Inter-disciplinary research complex are analyzed. The book is intended for engineers, postgraduates and students specializing in the field of nuclear physics, radiation solid state physics, physics of films and coatings, accelerator technique, material modification with use of charged particles beams

  5. Para-quinodimethane-bridged perylene dimers and pericondensed quaterrylenes: The effect of the fusion mode on the ground states and physical properties

    KAUST Repository

    Das, Soumyajit; Lee, Sangsu; Son, Minjung; Zhu, Xiaojian; Zhang, Wenhua; Zheng, Bin; Hu, Pan; Zeng, Zebing; Sun, Zhe; Zeng, Wangdong; Li, Runwei; Huang, Kuo-Wei; Ding, Jun; Kim, Dongho; Wu, Jishan

    2014-01-01

    relationships. In this study, para-quinodimethane (p-QDM)-bridged quinoidal perylene dimers 4 and 5 with different fusion modes and their corresponding aromatic counterparts, the pericondensed quaterrylenes 6 and 7, were synthesized. Their ground

  6. Characterization of vanadate-based transition-state-analogue complexes of phosphoglucomutase by spectral and NMR techniques

    International Nuclear Information System (INIS)

    Ray, W.J. Jr; Burgner, J.W. II; Post, C.B.

    1990-01-01

    Near ultraviolet spectral studies were conducted on two inhibitor complexes obtained by treating the dephospho form of the phosphoglucomutase·Mg 2+ complex with inorganic vanadate in the presence of either glucose 1-phosphate or glucose 6-phosphate. Part of the spectral differences between the two inhibitor complexes arises because the glucose phosphate moiety in the complex derived from glucose 1-phosphate binds to the enzyme in a different way from the glucose phosphate moiety in the complex derived from glucose 6-phosphate and because these alternative binding modes produce different environmental effects on the aromatic chromophores of the dephospho enzyme. These spectra differences are strikingly similar to those induced by the binding of glucose 1-phosphate and glucose 6-phosphate to the phospho enzyme. 31 P NMR studies of the phosphate group in these complexes also provide support for this binding pattern. Difference spectroscopy was used to resolve the spectrum of both inhibitor complexes to obtain the absorbance of their oxyvanadium chromophores. A spectrum more nearly like that of a normal vanadate ester is observed for the oxyvanadium chromophore in the corresponding complex involving glucose 1-phosphate and Li + instead of Mg 2+

  7. Changes in magnetic properties from solid state to solution in a trinuclear linear copper(II) complex

    NARCIS (Netherlands)

    Koval, I.A.; Akhideno, H.; Tanase, S.; Belle, C.; Duboc, C.; Saint-Aman, E.; Gamez, P.; Tooke, D.M.; Spek, A.L.; Pierre, J.-L.; Reedijk, J.

    2007-01-01

    A linear trinuclear copper(II) complex containing phenoxido- and alkoxido-bridges between the metal centers has been isolated and structurally characterized. The complex cation consists of a linear array of three copper ions, assembled by means of two doubly deprotonated ligands. The octahedral

  8. The electronically excited states of LH2 complexes from Rhodopseudomonas acidophila strain 10050 studied by time-resolved spectroscopy and dynamic Monte Carlo simulations. I. Isolated, non-interacting LH2 complexes.

    Science.gov (United States)

    Pflock, Tobias J; Oellerich, Silke; Southall, June; Cogdell, Richard J; Ullmann, G Matthias; Köhler, Jürgen

    2011-07-21

    We have employed time-resolved spectroscopy on the picosecond time scale in combination with dynamic Monte Carlo simulations to investigate the photophysical properties of light-harvesting 2 (LH2) complexes from the purple photosynthetic bacterium Rhodopseudomonas acidophila. The variations of the fluorescence transients were studied as a function of the excitation fluence, the repetition rate of the excitation and the sample preparation conditions. Here we present the results obtained on detergent solubilized LH2 complexes, i.e., avoiding intercomplex interactions, and show that a simple four-state model is sufficient to grasp the experimental observations quantitatively without the need for any free parameters. This approach allows us to obtain a quantitative measure for the singlet-triplet annihilation rate in isolated, noninteracting LH2 complexes.

  9. Para-bosons and Para-fermions in Quantum Mechanics

    International Nuclear Information System (INIS)

    Cattani, M.S.D.; Fernandes, N.C.

    1982-01-01

    Within the framework of the ordinary quantum mechanics, a detailed study of the energy eigenfunctions of N identical particles using the irreducible representations of the permutation group in the Hilbert space is performed. It is shown that the para-states, as occurs with the boson and fermion states, are compatible with the postulates of quantum mechanics and with the principle of indistinguishability. A mathematical support for the existence of para-bosons and para-fermions is given. Gentile's quantum statistics is, in a certain sense, justified. (Author) [pt

  10. Intensidade-duração-frequência de chuvas para o Estado de Mato Grosso do Sul Intensity-duration-frequency of rainfall for the State of Mato Grosso do Sul

    Directory of Open Access Journals (Sweden)

    Glenio G. Santos

    2009-12-01

    Full Text Available A ausência de equações de chuvas intensas para o Estado do Mato Grosso do Sul e a necessidade de maior segurança na elaboração de projetos e dimensionamento de obras hidráulicas, foram o alicerce para, com este estudo, se obtivessem e espacializassem as relações de intensidade, duração e frequência de precipitações para o Estado. Utilizou-se, então, da metodologia da desagregação da chuva de 24 h e se utilizaram dados pluviométricos consistidos de 109 estações disponíveis no banco de dados da Agência Nacional de Águas. As equações de chuvas intensas apresentaram bom ajuste, com coeficientes de determinação acima de 0,99 para todas as localidades estudadas. Os parâmetros ajustados apresentaram alta variabilidade resultando em grandes diferenças nos valores de precipitações intensas esperadas para as diferentes localidades. A espacialização permitiu boa visualização das diferenças evidenciando maiores intensidades esperadas na região centro-norte e as menores intensidades nas regiões sudeste e sudoeste do Estado. Os resultados demonstram a importância da obtenção da equação de intensidade-duração-frequência para cada localidade e sua utilização para a realização de estudos e projetos hidráulicos.Rain intensity data are necessary to increase security of hydraulic projects. The objective of this study was to determine the rain storm equations and the spatial distribution of rain intensity for the State of Mato Grosso do Sul, Brazil. The equations were obtained by disaggregation of 24 h rain data from 109 pluviometric stations available in the National Water Agency (ANA data bank. These equations resulted in coefficients of determination above 0,99 for all localities. The adjusted parameters showed high variability, resulting from different rain intensities in different places of the State. The interpolation of data allowed good visualization of the differences, evidencing higher intensities of rains

  11. Use of acai core as possibility of sustainable development of rural areas, the sustainable agriculture and rural electrification in Para state, Brazil; Uso do caroco de acai como possibilidade de desenvolvimento sustentavel do meio rural, da agricultura familiar e de eletrificacao rural no estado do Para

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Ivete Teixeira da; Almeida, Arthur da Costa [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Programa de Pos-Graduacao em Engenharia Eletrica], e-mail: pjulio@ufpa.br; Monteiro, Jose Humberto Araujo [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Dept. de Engenharia Eletrica e Computacao; Silva, Isa Maria Oliveira da [Universidade Federal do Para (UFPA), Belem, PA (Brazil). Dept. de Meteorologia; Rocha, Brigida Ramati Pereira da [Universidade Federal do Para (UFPA), Belem, PA (Brazil)

    2004-07-01

    The core of acai comes from a palm tree native to the Amazon, which grows in clumps. It is composed of several stems, reaching to form up to 25 feet in each clump. From Its fruits is obtained a drink (juice) and consumed daily by people in the Para state, especially the capital Belem and riverside communities. The state of Para is the largest producer of acai with 112,676 tons/year of fruit. Of this total 93.521 tons/year is residue (seed), or approximately 83 %. The community of Maroon that lives on the margin of the Genipauba River, in Abaetetuba, in Para state, has no electricity and is a major producer of acai, which is traded during the season 'in natura'. This paper presents the sustainable use of seeds, a byproduct of processing the fruits of acai. With appropriate methodology, natural pellets were obtained without compression, the acai biofuels. The work presents the technological innovation that has this type of pellet. The calorific value of the core, obtained in the laboratory, was in medium 4.505 kcal/kg and the average potential energy around 40.800 MWh/month. The pellets have great potential for export due to their use. It can be used in gasifiers, boilers for power generation, mechanical and gas ovens at bakeries, biomass stoves, replacing old coal irons, etc..

  12. Excited state electron and energy relays in supramolecular dinuclear complexes revealed by ultrafast optical and X-ray transient absorption spectroscopy.

    Science.gov (United States)

    Hayes, Dugan; Kohler, Lars; Hadt, Ryan G; Zhang, Xiaoyi; Liu, Cunming; Mulfort, Karen L; Chen, Lin X

    2018-01-28

    The kinetics of photoinduced electron and energy transfer in a family of tetrapyridophenazine-bridged heteroleptic homo- and heterodinuclear copper(i) bis(phenanthroline)/ruthenium(ii) polypyridyl complexes were studied using ultrafast optical and multi-edge X-ray transient absorption spectroscopies. This work combines the synthesis of heterodinuclear Cu(i)-Ru(ii) analogs of the homodinuclear Cu(i)-Cu(i) targets with spectroscopic analysis and electronic structure calculations to first disentangle the dynamics at individual metal sites by taking advantage of the element and site specificity of X-ray absorption and theoretical methods. The excited state dynamical models developed for the heterodinuclear complexes are then applied to model the more challenging homodinuclear complexes. These results suggest that both intermetallic charge and energy transfer can be observed in an asymmetric dinuclear copper complex in which the ground state redox potentials of the copper sites are offset by only 310 meV. We also demonstrate the ability of several of these complexes to effectively and unidirectionally shuttle energy between different metal centers, a property that could be of great use in the design of broadly absorbing and multifunctional multimetallic photocatalysts. This work provides an important step toward developing both a fundamental conceptual picture and a practical experimental handle with which synthetic chemists, spectroscopists, and theoreticians may collaborate to engineer cheap and efficient photocatalytic materials capable of performing coulombically demanding chemical transformations.

  13. Assessment methods for determination of the technical causes in accidents specially complex = Métodos de evaluación para determinación de las causas técnicas en siniestros de especial complejidad

    Directory of Open Access Journals (Sweden)

    Carlos Lozano Martínez

    2018-04-01

    Full Text Available The main scope of this article is to expose an effective methodology for the investigation in complex accidents that they have happened by structural complex failures, in temporary work equipment that has been used during the building on different construction sites. This methodology is based on real cases, and due to its application and development it has allowed the determination of the technical causes that has induced the mechanism for structural collapsed with the scientific severity that it is necessary in a performance of these characteristics. Accurately by the complexity that it motivates the determination of the technical causes in singular structural failures, as well as the judicial process derived from a serious accident. It is very important that it takes into account the methodology and aspects that it has to comply for what the expert report adapts to the scope and expected expectations, basically so that expert report has the scientific rigor that it allows to demonstrate by unquestioned form the technical causes that has induced the failure. Some main aspects it must to take into account during all the process and for the making of expert report, like; visiting the accident area getting the broken pieces and rest of pieces belonging temporary work equipment or installation; permanent identification and traceability during the manipulation and tests carried out on the recovered pieces, independently of the nature, destructive or not; application of the analytical and experimental assessment methods for understanding the safety conditions of the damaged equipment, previously and in the moment of the accident, finally, an expert report writing in a simple language that allows to the different agents (judge, prosecutor, lawyer, accused involved on the judicial process, to understand clearly how the mechanism of failure has occurred despite that they have not a technical knowledge about the topic. Resumen En el presente art

  14. Spatial and temporal heterogeneity of water quality in Rio das Pedras reservoir (Billings Complex, São Paulo State

    Directory of Open Access Journals (Sweden)

    Viviane Moschini-Carlos

    2009-12-01

    Full Text Available Este trabalho teve como objetivo avaliar em escalas espacial (vertical e horizontal e temporal as características limnológicas do Reservatório Rio das Pedras (Complexo Billings, São Bernardo do Campo, SP – Brasil. Nos meses de março e outubro de 2004 foram amostradas em perfil três estações no reservatório. As variáveis analisadas foram: temperatura, condutividade elétrica e pH, com sonda multiparâmetros; concentrações de amônio, nitrito, nitrato, fosfato, ortosilicato, fósforo total, clorofila-a e feofitina, por método espectrofotométrico; oxigênio dissolvido por método titulométrico; além das concentrações de sólidos totais e material em suspensão. Para análise estatística dos dados foi aplicada a ACP (Análise de Componentes Principais. A heterogeneidade temporal observada foi conseqüência das diferenças de temperatura, que geraram estratificação térmica, química e biológica, no mês de março. As diferenças espaciais verticais também resultaram da estratificação térmica. As maiores discrepâncias das características limnológicas, em relação ao padrão de distribuição espacial horizontal, foram obtidas na estação 1, e são diretamente relacionadas à influência das águas provenientes do reservatório Billings. De acordo com a CONAMA 357/05, para o mês de outubro de 2004 as águas do reservatório estão em conformidade com a Classe 3. Para o mês de março, na estação 3 os valores estão abaixo do estabelecido, conferindo não conformidade para a Classe 3.

  15. Generating para-water from para-hydrogen: A Gedankenexperiment.

    Science.gov (United States)

    Ivanov, Konstantin L; Bodenhausen, Geoffrey

    2018-07-01

    A novel conceptual approach is described that is based on the transfer of hyperpolarization from para-hydrogen in view of generating a population imbalance between the two spin isomers of H 2 O. The approach is analogous to SABRE (Signal Amplification By Reversible Exchange) and makes use of the transfer of spin order from para-hydrogen to H 2 O in a hypothetical organometallic complex. The spin order transfer is expected to be most efficient at avoided level crossings. The highest achievable enrichment levels of para- and ortho-water are discussed. Copyright © 2018 Elsevier Inc. All rights reserved.

  16. Solid state luminescence of CuI and CuNCS complexes with phenanthrolines and a new tris (aminomethyl) phosphine derived from N-methyl-2-phenylethanamine

    International Nuclear Information System (INIS)

    Starosta, Radosław; Komarnicka, Urszula K.; Puchalska, Małgorzata

    2014-01-01

    A new tris (aminomethyl) phosphine derived from N-methyl-2-phenylethanamine P(CH 2 N(CH 3 )CH 2 CH 2 Ph) 3 (1) has been synthesized and characterized by the NMR spectra. Also, three new copper(I) iodide or isothiocyanate complexes with 1 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmp) [CuI(phen)P(CH 2 N(CH 3 )CH 2 CH 2 Ph) 3 ] (1P) CuI(dmp)P(CH 2 N(CH 3 )CH 2 CH 2 Ph) 3 ] (1I) and [CuNCS(dmp)P(CH 2 N(CH 3 )CH 2 CH 2 Ph) 3 ] (1T), have been synthesized and characterized by elemental analysis as well as studied by NMR, UV–vis, IR and luminescence spectroscopies. An X-ray structure of 1P complex revealed that the geometry around Cu(I) center in this complex is distorted pseudo-tetrahedral. Investigated complexes exhibit orange, rather weak photoluminescence in the solid state. This relatively low intensity may be related to the high flattening deformations of the molecular geometries in the excited triplet states On the basis of TDDFT calculations we confirmed that the absorbance and luminescence bands of (MX,MPR 3 )LCT as well as of (MX)LCT types result mainly from the transitions from the copper–iodine (or isothiocyanate) bonds and a small admixture of copper–phosphine bonds to antibonding orbitals of phen or dmp diimines. -- Highlights: • A novel tris(aminomethyl)phosphine is obtained from N-methyl-2-phenylethanamine. • Three new CuI and CuNCS complexes with phen or dmp and a novel phosphine are presented. • The obtained complexes are luminescent in the solid state. • Main absorbance and luminescence bands are of (MX,MPR 3 )LCT as well as (MX)LCT types

  17. Studies of ruthenium complexes, 8. Kinetic studies of the thermal substitution reaction of hexaammine and cis--dihalogenotetraammineruthenium(III) complexes in the solid state

    Energy Technology Data Exchange (ETDEWEB)

    Ohyoshi, A; Hiraki, S; Odate, T; Kohata, S; Oda, J [Kumamoto Univ. (Japan). Faculty of Engineering

    1975-01-01

    The kinetics of the thermal substitution reaction of hexaamineruthenium (III) halides and cis-dihalogenotetraamineruthenium (III) halides have been studied in the solid state. The reaction rates and kinetic parameters were determined for these two reactions; (Ru(NH/sub 3/)/sub 6/)X/sub 3/..-->..(RuX(NH/sub 3/)/sub 5/)X/sub 2/+NH/sub 3/, (X=Br, I) and cis - (RuX/sub 2/(NH/sub 3/)/sub 4/)X..-->..(RuX/sub 3/(NH/sub 3/)/sub 3/)+NH/sub 3/, (X=Cl, Br). The values of the rate constant, the activation energy, and the activation entropy were 2.10x10/sup -5/ s/sup -1/ (at 161/sup 0/C), 23.2 kcal mol/sup -1/, and -29.3 e.u. for the hexaamine bromide, and 2.92x10/sup -5/ s/sup -1/ (at 162/sup 0/C), 31.3 kcal mol/sup -1/, and -10.1 e.u. for the cis-dibromotetraamine bromide. The Ssub(N)2 mechanism is more probable for the former reaction, while the Ssub(N)1 mechanism is more probable for the latter reaction.

  18. Estudos bacteriológicos e sorológicos de um surto de peste no Estado da Paraíba, Brasil Bacteriological and serological studies of a plague outbreak in the Paraíba state, Brazil

    Directory of Open Access Journals (Sweden)

    Alzira Maria Paiva Almeida

    1989-06-01

    Full Text Available Foram realizados estudos bacteriológicos e/ou sorológicos para diagnóstico da infecção pestosa, em material obtido de 452 pacientes (48 positivos, 1.938 roedores e outros pequenos mamíferos (75 positivos, 4.756 cães (141 positivos e 3.047 gatos (57 positivos, oriundos de 41 municípios localizados em toda a extensão da área paraibana do Planalto da Borborema. A infecção foi encontrada em 21 municípios. Foram isoladas 20 cepas de Yersinia pestis de amostras coletadas de três pacientes e 17 roedores. Estas cepas apresentam características bioquímicas, fatores de virulência, sensibilidade aos antibióticos e poder patogênico experimental semelhantes ao de cepas isoladas anteriormente. Pelos estudos realizados não foram observados, no surto de peste que eclodiu em setembro de 1986 na Paraíba, fatores diferentes dos observados nos outros focos do nordeste do Brasil.During a plague outbreak in the Borborema Plateu focus (Paraíba, bacteriological and serological studies were carryed out in material from 452 patients (48 positives, 1,938 rodents and other small mammals (75 positives, 4,756 dogs (141 positives and 2,047 cats (57 positives obtained from 41 counties (out of which, 21 produced positive samples. Twenty Yersinia pestis strains isolated from material from 3 patients ans 17 rodents, displayed biochemical reactions, virulence factors, antibiotic susceptibility and animal experimental pathogenicity similar to those observed in strains previously isolated. According to our findings this recent plague outbreak did not exhibite different factors from those observed during prior outbreaks in other plague foci in the northeast of Brazil.

  19. Cancro em Paricá (Schizolobium parahyba var. amazonicum no Estado do Pará Canker Disease of Parica (Schizolobium parahyba var. amazonicum in Para State, Brazil

    Directory of Open Access Journals (Sweden)

    Célia Regina Tremacoldi

    2010-02-01

    Full Text Available

    Plantios de paricá, avaliados no Município de Dom Eliseu, Estado do Pará, apresentaram sintomas de cancro. Várias espécies de fungos foram associadas ao cancro observado no campo, mais notavelmente Lasiodiplodia theobromae e Pestalotiopsis sp. Culturas isoladas destes fungos, frequentemente associados a outros (incluindo Fusarium oxysporum, Alternaria e basidiomicetes, foram testadas quanto à patogenicidade em plantas jovens de paricá, com aproximadamente um metro de altura. Apenas L. theobromae produziu cancro sob as condições testadas, quando discos de cultura foram aplicados usando técnicas de inoculação por ferimento e alta umidade, reproduzindo perfeitamente os sintomas do campo. Pestalotiopsis sp. causou danos muito menores quando comparado a L. theobromae. A confirmação de L. theobromae como agente causal do cancro em paricá ocorreu após o reisolamento do fungo a partir dos tecidos sintomáticos das plantas inoculadas em casa-de-vegetação, concluindo a verificação dos Postulados de Koch. Este é o primeiro relato deste patógeno em paricá.

     

    Doi: 10.4336/2009.pfb.59.69

    Canker have been found in field plantings of parica examined in Dom Eliseu county, Para State,
    Brazil. Several fungal species were associated with the field canker, most notably Lasiodiplodia theobromae
    and Pestalotiopsis sp. Isolated cultures of these fungi together with other often associated fungi (including
    Fusarium oxysporum, Alternaria, basidiomycetes were tested for pathogenicity on young parica plants, with
    approximately one meter height. Only L. theobromae produced canker under the conditions tested when discs
    of culture were applied using wound inoculation techniques and high humidity, which closely mimicked the field
    symptoms. Pestalotiopsis sp. proved much less damaging compared to L. theobromae. The acknowledgment of
    L. theobromae as the causal agent of parica canker came after the

  20. Fluorescence ratiometric sensing of polyols by phenylboronic acid complexes with ligands exhibiting excited-state intramolecular proton transfer in aqueous micellar media

    Energy Technology Data Exchange (ETDEWEB)

    Trejo-Huizar, Karla Elisa; Jiménez-Sánchez, Arturo; Martínez-Aguirre, Mayte A.; Yatsimirsky, Anatoly K., E-mail: anatoli@unam.mx

    2016-11-15

    2-Phenyl-3-hydroxy-4(1H)-quinolone possessing dual fluorescence due to excited-state intramolecular proton transfer (ESIPT) forms stable complex with phenylboronic acid with blue shifted emission maximum in micellar medium of a cationic surfactant even though the compound lacks required for complexation with boronic acids cis-diol structure. No complexation is observed in the presence of neutral or anionic surfactants. Titrations of this complex with polyols including sugars and nucleotides at pH 8 displace free quinolone showing ratiometric response, which allows determination of polyols with detection limits 0.05–1 mM and unusually wide linear dynamic ranges. Another ESIPT dye 2-(2′-hydroxyphenyl)−1H-benzimidazole also lacking cis-diol structure forms equally stable complex with phenylboronic acid and allows ratiometric determination of polyols with similar characteristics. The results of this study demonstrate that blocking ESIPT of signaling molecule by complexation of the receptor with the proton donor group eliminates the low energy emission from tautomeric form but strongly enhances the high energy emission typical for “normal” form of signaling molecule creating a possibility of ratiometric sensing.

  1. Isolation of rabies virus from the parotid salivary glands of foxes (Pseudalopex vetulus from Paraíba State, Northeastern Brazil Isolamento de vírus rábico de glândulas salivares parótidas de raposas (Pseudalopex vetulus do Estado da Paraíba, Nordeste do Brasil

    Directory of Open Access Journals (Sweden)

    Maria Luana Cristiny Rodrigues Silva

    2009-09-01

    Full Text Available To determine the presence of rabies virus in the parotid salivary glands, 12 road-killed rabies-positive hoary foxes (Pseudoalopex vetulus were tested by using the fluorescent antibody test (FAT and mouse inoculation test (MIT. All 12 parotid salivary glands were positive for both tests, although in some cases several passages were required. The findings of this study support the importance of the hoary fox as rabies reservoir in the semi-arid region of Paraíba State, Northeastern Brazil.Para determinar a presença de vírus rábico em glândulas salivares parótidas, 12 raposas (Pseudalopex vetulus atropeladas em rodovias e positivas para raiva foram testadas pelo teste de imunofluorescência direta (IFD e teste de inoculação em camundongos (IC. Todas as 12 glândulas salivares parótidas foram positivas em ambos os testes, embora, em alguns casos, várias passagens terem sido necessárias. Os achados do presente trabalho reforçam a importância das raposas como reservatórios de raiva no semi-árido do Estado da Paraíba, Nordeste do Brasil.

  2. Pedogenesis of a catena of the Farmdale-Sangamon Geosol complex in the north central United States

    Science.gov (United States)

    Jacobs, P.M.; Konen, M.E.; Curry, B. Brandon

    2009-01-01

    The Farmdale-Sangamon Geosol pedocomplex consists of the Sangamon Geosol and the overlying Farmdale Geosol, which form the most extensive terrestrial record of the last interglacial to glacial transition in the Midwest United States. The geosol complex formed for upwards of 100??ka, extending from the end of MIS 6 through 4 for the Sangamon Geosol, then the Farmdale Geosol for during a brief episode at the end of MIS 3 following slow accumulation and pedogenic modification of eolian silt deposited on top of the Sangamon Geosol. Our study site consists of a buried paleo-hillslope transect that forms a catena, enabling evaluation of slope effects on interglacial-scale soil formation. The Sangamon Geosol is formed in calcareous and illitic glaciogenic sediment. Along the catena the Sangamon Geosol profiles display some morphological changes, namely in terms of colors that we interpret as indicators of differences in drainage. Most thickness and horizonation characteristics are similar all along the transect, with intact upper sola horizons (AE and E horizons) that overlie clay-enriched Bt horizons. The Bt horizons contain abundant clay that exists as illuvial clay coatings, matrix infills, and as mosaic-speckled domains. The clay originated both by in situ weathering and through illuviation from the clay depleted upper sola. Slope does not appear to affect Bt characteristics beyond redder hues of the matrix and clay coatings in the upper slope position. With depth, effects of carbonate leaching and infilling of clay in the matrix decrease and clay coatings are restricted to walls of voids adjacent to aggregates. Clay mineralogy shows illite depletion, but no interstratified kaolinite-expandable minerals, indicating the degree of weathering is not as great as is typical of Sangamon Geosol profiles formed in loess or in glaciogenic sediment of the central Illinois type area. Clay mineralogy is also stratified with depth, coincident with particle size, which probably

  3. Evaluation of four techniques for diagnosis of Giardia lamblia in children's stool from Belém city, Para State, Brazil

    OpenAIRE

    Machado, Ricardo Luiz Dantas; Figueredo, Maria Cristina; Frade, Amanda Farage; Kudó, Mônica Eriko; Silva Filho, Manoel Gomes; Póvoa, Marinete Marins

    2001-01-01

    Relatamos a comparação de quatro metodologias para o diagnóstico da Giardia lamblia em material fecal de crianças, Belém/PA. A Hematoxilina Férrica e o método direto apresentaram menor positividade, enquanto que o Método de Faust continua uma boa escolha para o diagnóstico e o Ensaio imunoenzimático melhora a qualidade da detecção deste parasito.We report the evaluation of four techniques for Giardia lamblia diagnosis in children's stool. The Iron haematoxilin staining and direct examination ...

  4. Steady-state configuration and tension calculations of marine cables under complex currents via separated particle swarm optimization

    Science.gov (United States)

    Xu, Xue-song

    2014-12-01

    Under complex currents, the motion governing equations of marine cables are complex and nonlinear, and the calculations of cable configuration and tension become difficult compared with those under the uniform or simple currents. To obtain the numerical results, the usual Newton-Raphson iteration is often adopted, but its stability depends on the initial guessed solution to the governing equations. To improve the stability of numerical calculation, this paper proposed separated the particle swarm optimization, in which the variables are separated into several groups, and the dimension of search space is reduced to facilitate the particle swarm optimization. Via the separated particle swarm optimization, these governing nonlinear equations can be solved successfully with any initial solution, and the process of numerical calculation is very stable. For the calculations of cable configuration and tension of marine cables under complex currents, the proposed separated swarm particle optimization is more effective than the other particle swarm optimizations.

  5. DFT study of electron absorption and emission spectra of pyramidal LnPc(OAc) complexes of some lanthanide ions in the solid state

    Science.gov (United States)

    Hanuza, J.; Godlewska, P.; Lisiecki, R.; Ryba-Romanowski, W.; Kadłubański, P.; Lorenc, J.; Łukowiak, A.; Macalik, L.; Gerasymchuk, Yu.; Legendziewicz, J.

    2018-05-01

    The electron absorption and emission spectra were measured for the pyramidal LnPc(OAc) complexes in the solid state and co-doped in silica glass, where Ln = Er, Eu and Ho. The theoretical electron spectra were determined from the quantum chemical DFT calculation using four approximations CAM-B3LYP/LANL2DZ, CAM-B3LYP/CC-PVDZ, B3LYP/LANL2DZ and B3LYP/CC-PVDZ. It was shown that the best agreement between the calculated and experimental structural parameters and spectroscopic data was reached for the CAM-B3LYP/LANL2DZ model. The emission spectra were measured using the excitations both in the ligand and lanthanide absorption ranges. The possibility of energy transfer between the phthalocyanine ligand and excited states of lanthanide ions was discussed. It was shown that the back energy transfer from metal states to phthalocyanine state is responsible for the observed emission of the studied complexes both in the polycrystalline state and silica glass.

  6. Rapid spin-state interconversion in the bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by Moessbauer spectroscopy

    International Nuclear Information System (INIS)

    Winkler, H.; Trautwein, A.X.; Toftlund, H.

    1992-01-01

    Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N 6 ] type above room temperature. The Moessbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-Moessbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔE LH =18(1) kJmol -1 is deduced. (orig.)

  7. Position-dependent deuterium isotope effect on photoisomerization of ammineaquarhodium(III) complexes: identification of the excited-state vibronic deactivation mode

    International Nuclear Information System (INIS)

    Skibsted, L.H.

    1987-01-01

    cis to trans Photoisomerization quantum yields are increased by a factor of approximately two by deuteriation of co-ordinated water in tetra-amminediaquarhodium, but are almost insensitive to deuteriation of co-ordinated water in tetra-ammineaquachlororhodium and to deuteriation of co-ordinated ammonia in either complex; this identifies the dominating nonradiative deactivation mode (competing with the excited-state rearrangement) as a hydrogen-oxygen vibration in an excited-state intermediate of reduced co-ordination number. (author)

  8. Selection of the DC-60 cyclotron as the basic facility for the Inter-disciplinary research complex in the L.N. Gumilev Eurasian State University. Chapter 2

    International Nuclear Information System (INIS)

    2003-01-01

    In the Chapter 2 the DC-60 specialized accelerator project of the Inter-disciplinary research complex in the L.N. Gumilev Eurasian State University is described. The DC-60 cyclotron is intended for applied studies which can be accomplished on both the ion beams of the electron cyclotron resonance source with voltage up to 25 kV and the accelerated ions from carbon to xenon. The cyclotron is design on the base of compact magnet with weight about 74 tonnes, and it mean magnetic field is 1.6 T, section angle - 50 Deg. Design of the Inter-disciplinary research complex building in the L.N. Gumilev Eurasian State University is described as well. Technical performances of the building and their parameters are given

  9. Gerontotecnologia educativa voltada ao idoso estomizado à luz da complexidade Gerontotecnología educativa para el adulto mayor ostomizado a la luz de la complejidad Educational geronto-technology for ostomized seniors from a complexity perspective

    Directory of Open Access Journals (Sweden)

    Edaiane Joana Lima Barros

    2012-06-01

    Full Text Available Objetivou-se apresentar a cartilha educativa como um produto gerontotecnológico útil para o cuidado ao idoso estomizado à luz da complexidade. O trabalho foi realizado, no segundo semestre de 2007, em um hospital universitário do sul do Brasil. Os dados foram coletados através de entrevistas e apresentados na forma de uma cartilha educativa. Esta foi validada por idosos estomizados e por uma enfermeira atuante na área há mais de dezesseis anos. A cartilha apresentou-se como uma gerontotecnologia capaz de facilitar a compreensão da pessoa idosa estomizada e seu familiar sobre os direitos dos estomizados, conceitos e tipos de estomas, cuidados com a estomia e importância da família e do grupo de apoio para o cuidado. Conclui-se que a cartilha educativa apresenta-se como mais um instrumento de promoção da saúde, facilitador do processo educativo em saúde, tornando a pessoa idosa estomizada copartícipe do seu cuidado.Este trabajo tuvo por objetivo presentar el folleto educativo como un producto gerontotecnológico para el cuidado del adulto mayor ostomizado a la luz de la Complejidad. Fue realizado en el segundo semestre de 2007 en un hospital en el sur de Brasil. Los datos fueron recolectados a través de entrevistas y presentado como un folleto educativo. El folleto fue validado por los adultos mayores ostomizados y una enfermera actuante en el área. El folleto fue presentado como una gerontotecnología capaz de facilitar la comprensión de la persona anciana y sus familiares sobre los derechos del ostomizado; conceptos y tipos de estomas; cuidados con la ostomía y la importancia de la familia y del grupo de apoyo para el cuidado. Se concluye que el folleto educativo se presenta como una herramienta facilitadora de promoción de la salud del proceso educativo en salud que hace del adulto mayor ostomizado coparticipante en su cuidado.We aimed to present the educational booklet as a geronto-technological product for caring for

  10. Paradigma da ciência, do saber e do conhecimento e a educação para a complexidade: pressupostos e possibilidades para a formação docente Paradigm of science, of wisdom and knowledge and education to the complexity: assumptions and possibilities for teacher training

    Directory of Open Access Journals (Sweden)

    Zita Ana Lago Rodrigues

    2008-01-01

    Full Text Available Centrando leituras sobre as bases teóricas do paradigma científico dominante, em seus fundamentos racionalistas-cientificistas, determinantes na ciência, no saber e nos conhecimentos trabalhados na escola, apresentamos a proposição de uma educação voltada para a complexidade. Tal proposição surge do chamado paradigma emergente, o qual visa superar as inércias e a reatividade tradicionais nos procedimentos de escolarização e de formação docente e caminhar em situações pró-ativas e em prótopias mobilizadoras para a implementação de ações curriculares e educativas que possibilitem uma formação mais aberta, flexível e inter-transcultural, que culmine com uma educação mais humana e convivencial.Focusing readings on the theoretical foundations of the dominant scientific paradigm, in their rationalist-cientificist pleas, determinants in science, in knowing and in the knowledge learned at school, we present the proposition of an education geared towards complexity. This proposition is the so-called emerging paradigm, which aims at overcoming the inertia and reactivity in the traditional procedures for education and teacher training and walk into proactive situations and mobilizing protopias for the implementation of curriculum and educational training actions to promote a more open, flexible and inter-cross learning, which will result in a more human and convivial education.

  11. Utilidad de las películas para debatir temas complejos: política, religión y ciencia en Ágora Usefulness of movies for discussing complex topics: politics, religion and science in Ágora

    Directory of Open Access Journals (Sweden)

    José Aramburu

    2012-06-01

    Full Text Available Introducción. Las películas comerciales han constituido un método docente de demostrada eficacia en entornos educativos de ciencias de la salud. En el presente artículo se describe la utilidad de Ágora para presentar las complejas relaciones entre ciencia, política y religión, las cuales afectan a diversas situaciones biomédicas en la actualidad. Materiales y métodos. La actividad consistió en la proyección de la película y posterior debate, al final del cual los estudiantes cumplimentaron, de forma anónima y voluntaria, un cuestionario de diez preguntas sobre los temas tratados y los vinculados con los objetivos educativos preestablecidos. Después se les solicitó que enviaran voluntariamente un informe personal sobre los aspectos más relevantes de la película. Resultados. Cincuenta y dos estudiantes (96,3% de los asistentes respondieron el cuestionario de evaluación. Consideraron que Ágora tenía un interés notable para describir un ejemplo de conflicto entre ciencia y poderes sociales, y manifestaron que tales situaciones aún podían persistir hoy. En los informes personales realizados por 49 estudiantes (90,7% destacaron la consideración de tales conflictos, las barreras impuestas al conocimiento nuevo, la discriminación de la mujer en la sociedad y en la ciencia, así como las dificultades que entraña el respeto por el pensamiento individual. Conclusiones. Ágora puede ser una película de interés para analizar y debatir las difíciles relaciones entre ciencia, religión y política. A pesar de su ambientación clásica, plantea situaciones aún identificables en nuestra sociedad y que los estudiantes deberían conocer.Introduction. Popular movies have turned out to be useful educational tools able to introduce complex issues to students of health sciences. The present paper describes the usefulness of Ágora to discuss the conflicts that might appear when science is faced with religion or politics. Materials and

  12. Athletes and sports teams as complex adaptive system: A review of implications for learning design. [Atletas y equipos deportivos como sistemas adaptativos complejos: Una revision de las Implicaciones para el diseño del aprendizaje].

    Directory of Open Access Journals (Sweden)

    Keith Davids

    2015-01-01

    Full Text Available Ecological dynamics is a systems-oriented theoretical framework which conceptualises sport performers as complex adaptive systems. It seeks to understand the adaptive relations that emerge during coordination of interactions between each performer and a specific performance environment. This approach has identified the individual-environment relationship as the relevant scale of analysis for explaining how processes of perception, cognition and action underpin expert performance in sport. This theoretical overview elucidates key ideas from previous work identifying functional characteristics of complex adaptive systems, such as co-adaptation, emergent coordination tendencies and capacity to utilise affordances, which underlie performance and learning in team and individual sports. The review of research focuses on how key principles of ecological dynamics inform our understanding of learning and transfer, and their impact on practice task design in sport development programmes. To support this analysis, data from research on performance of elite and developmental athletes in individual and team sports are presented to highlight important principles of learning design from an ecological dynamics perspective. Resumen La dinámica ecológica es un marco teórico orientado a los sistemas que conceptualiza a los athletas como sistemas complejos adaptativos. Con el objeto de comprender las relaciones adaptativas que surgen durante la coordinación de las interacciones entre cada uno de los athletas y un medio/ambiente de actuación específico. Este enfoque ha identificado la relación individuo-ambiente como la escala de análisis relevante para explicar cómo los procesos de la percepción, la cognición y la acción respaldan el rendimiento de expertos en el deporte. Este documento de posición teórica aclara características funcionales esenciales de los sistemas adaptativos complejos, tales como co-adaptación, tendencias emergentes de

  13. Photophysics of Singlet and Triplet Intraligand Excited States in [ReCl(CO)(3)(1-(2-pyridyl)-imidazo[1,5-alpha]pyridine)] Complexes

    Czech Academy of Sciences Publication Activity Database

    Blanco-Rodríguez, A. M.; Kvapilová, Hana; Sýkora, Jan; Towrie, M.; Nervi, C.; Volpi, G.; Záliš, Stanislav; Vlček, Antonín

    2014-01-01

    Roč. 136, č. 16 (2014), s. 5963-5973 ISSN 0002-7863 R&D Projects: GA ČR GBP208/12/G016; GA MŠk LD11086 Institutional support: RVO:61388955 Keywords : CARBONYL-BIPYRIDINE COMPLEXES * RESOLVED INFRARED-SPECTROSCOPY * CHARGE-TRANSFER STATES Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 12.113, year: 2014

  14. Air quality evaluation in the area around the Jorge Lacerda Thermoelectric Complex in Santa Catarina State, Brazil: 1987 to 1991 period

    International Nuclear Information System (INIS)

    Magri, Jose Lourival; Silva, Ligia Bittencourt da

    1993-01-01

    This report presents the results of the Air Quality Monitoring Program carried out by ELETROSUL in the period of 1987 to 1991, in the influence area of the Jorge Lacerda Thermoelectric Complex, in Santa Catarina State, Brazil. The results show that for sulfur dioxide the air quality was good for 95% of the measurements, while for the total suspended particulates the corresponding value was 80%. 9 refs., 3 figs., 1 tab

  15. Aspectos biofarmacêuticos da formulação de medicamentos para neonatos: fundamentos da complexação de indometacina com hidroxipropil-beta-ciclodextrina para tratamento oral do fechamento do canal arterial Biopharmaceutical aspects of drug formulation for neonatology: rational for indomethacin's complexation with hydroxypropyl-beta-cyclodextrin to treat patent ductus arteriosus

    Directory of Open Access Journals (Sweden)

    Ana Cristina Ribeiro Rama

    2005-09-01

    Full Text Available A terapêutica farmacológica em recém-nascidos confronta-se, por um lado, com um organismo sujeito a marcadas alterações biológicas, resultantes da composição orgânica e da maturação funcional, que decorre a diferentes graus em crianças com a mesma idade, determinando modificações no perfil farmacocinético e farmacodinâmico e, por outro lado, com a necessidade efetiva da utilização de fármacos. Para dar resposta à necessidade de tratamento destes doentes, recorre-se à utilização de medicamentos "off label", sendo esta uma prática com um elevado risco de segurança e de eficácia, na ausência de informação acerca da estabilidade, solubilidade e biodisponibilidade. Considerou-se, assim, que a utilização de derivados das ciclodextrinas altamente solúveis em água seria uma alternativa para a formulação de preparações líquidas aquosas de fármacos fracamente solúveis, aliada à melhoria de biodisponibilidade e de segurança. Esta revisão pretende fundamentar a possibilidade de recurso à complexação de indometacina com hidroxipropil-beta-ciclodextrina, com o objetivo de melhorar as características de biodisponibilidade e de segurança e permitir a administração por via oral para o tratamento farmacológico do fechamento do canal arterial em prematuros ou em recém-nascidos com esta patologia.Pharmacological therapy for newborns is faced on one hand, with an organism characterized by biological differences and functional immaturity with various grades of evolution for the same age, implying changes on the pharmacokinetic and pharmacodinamic medicine profiles. On the other hand, there is the effective need for pharmacotherapy. The "off label" use of medicines is therefore the only thing left to do, having in mind the risk of using therapeutic agents not studied for this special group of people. On this context it has been considered the use of cyclodextrin derivatives like hydroxypropyl-beta-cyclodextrin as an

  16. Advantages of complex scaling only the most diffuse basis functions in simultaneous description of both resonances and bound states

    Czech Academy of Sciences Publication Activity Database

    Landau, A.; Haritan, I.; Kaprálová-Žďánská, Petra Ruth; Moiseyev, N.

    2015-01-01

    Roč. 113, 19-20 (2015), s. 3141-3146 ISSN 0026-8976 R&D Projects: GA MŠk(CZ) LG13029 Institutional support: RVO:68378271 Keywords : resonance * complex scaling * non-Hermitian * ab-initio Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 1.837, year: 2015

  17. Preliminary Report Regarding State Allocation Board Funding of the Los Angeles Unified School District's Belmont Learning Complex.

    Science.gov (United States)

    Armoudian, Maria; Carman, Georgann; Havan, Artineh; Heron, Frank

    A preliminary report of the California Legislature's Joint Legislative Audit Committee presents findings on the construction team selection process for the Los Angeles Unified School District's (LAUSD's) Belmont Learning Complex. Evidence reveals a seriously flawed process that directly conflicted with existing law and practice. The report…

  18. A Hybrid Solid-State NMR and Electron Microscopy Structure-Determination Protocol for Engineering Advanced para-Crystalline Optical Materials

    NARCIS (Netherlands)

    Thomas, Brijith; Rombouts, Jeroen; Oostergetel, Gert T.; Gupta, Karthick B.S.S.; Buda, Francesco; Lammertsma, Koop; Orru, Romano; de Groot, Huub J.M.

    2017-01-01

    Hybrid magic-angle spinning (MAS) NMR spectroscopy and TEM were demonstrated for de novo structure determination of para-crystalline materials with a bioinspired fused naphthalene diimide (NDI)–salphen–phenazine prototype light-harvesting compound. Starting from chiral building blocks with C2

  19. X-ray structure of a transition state analog complex reveals the molecular origins of the catalytic power and substrate specificity of acetylcholinesterase

    Energy Technology Data Exchange (ETDEWEB)

    Harel, M.; Silman, I. [Weizmann Inst. of Science, Rehovot (Israel); Quinn, D.M.; Nair, H.K. [Univ. of Iowa, Iowa City, IA (United States); Sussman, J.L. [Weizmann Inst. of Science, Rehovot (Israel)]|[Brookhaven National Lab., Upton, NY (United States)

    1996-03-13

    The structure of a complex of Torpedo californica acetylcholinesterase with the transition state analog inhibitor m-(N, N,N-trimethylammonio)-2,2,2-trifluoroacetophenone has been solved by X-ray crystallographic methods to 2.8 A resolution. Since the inhibitor binds to the enzyme about 10{sup 10}-fold more tightly than the substrate acetylcholine, this complex provides a visual accounting of the enzyme-ligand interactions that provide the molecular basis for the catalytic power of acetylcholinesterase. The acetyl ester hydrolytic specificity of the enzyme is revealed by the interaction of the CF{sub 3} function of the transition state analog with a concave binding site comprised of the residues G119, W233, F288, F290, and F331. The highly geometrically convergent array of enzyme-ligand interactions visualized in the complex described herein envelopes the acylation transition state and sequesters it from solvent, this being consistent with the location of the active site at the bottom of a deep and narrow gorge. 82 refs., 5 figs.

  20. Synthesis and characterization of some complexes with imidazole and pyrazole from saccharinate transition ions in oxidation state (II)

    International Nuclear Information System (INIS)

    Pineda Cedeno, Leslie William

    2001-01-01

    The synthesis and characterization of metal ions saccharinate of the first serie of transition with the imidazole and pyrazole molecules in water and absolute ethanol were studied. In general, it found that in this series of saccharinate of coordinated water molecules are replaced by imidazole and pyrazole molecules with different substitution patterns, generating neutral complex of molecular formula [M(Sac) 2 (L) n (H 2 O) n-4 ] and cationic complex of molecular formula [M(L) n (H 2 O) 2 ]x2Sac, [M(L) n (H 2 O) 3 ]x2Sac, [M(L) n ]x2Sac, where M = V(II), Cr(II), Mc(II), Fe(II), Co(II), Ni(II) y Zn(II); Sac = saccharinate ion; L = imidazole (imd) and pyrazole (pir) and n = 6,4,3 and 2. These compounds are soluble in DMF and insoluble in all other common solvents. In turn, synthesized compounds in water were characterized by X ray crystallography, where preliminary data of refinement cycles, generate formulas of isostructural type [M(imd) 4 (H 2 O) 2 ]x2Sac and [M(Sac) 2 (pir) 2 (H 2 O) 2 ] where M = Co(II), Ni(II). The imidazole complex crystallize in the triclinic crystal system and space group P-1, while the pyrazole complexes crystallize in the monoclinic crystal system and space group P2 (1)/n. Gradual diminution was observed in the bond distances of M-N (saccharinate ion), M-N (imidazole) and M-N (pyrazole). The complex was characterized by spectroscopic methods, magnetic and electrochemical. (author) [es

  1. Genogram: a tool for characterizing the families of adolescents parents in João Pessoa, Paraíba State, Brazil = Genograma: ferramenta para caracterizar as famílias de pais adolescentes em João Pessoa, Estado da Paraíba, Brasil

    Directory of Open Access Journals (Sweden)

    Alice Iana Tavares Leite

    2012-10-01

    Full Text Available The study aimed to characterize the family composition of adolescent fathers in the city of João Pessoa, Paraíba State. This is a part of a multicenter survey developed in the states of Paraíba, Rio Grande do Sul and Santa Catarina. The population was composed of ten teenage fathers living in the urban area of João Pessoa. Data collection occurred from December 2008 to October 2010 through semi-structured interview and construction of the genogram and eco-map. Participants' age ranged from 16 to 19 years. They all lived with his partner and most had low education. The unemployed and those with income below one minimum wage indicated the family as the keeper of the home. Most fathers also depended on other family housing, and the amount of people living in the same house ranged from three to seven. Despite the existence of conflicting and/or distant relationships, all respondents reported that seek emotional and financial support in their own family. Fatherhood and motherhood in adolescence had already been experienced by some families. Understanding adolescent parents requires a broader view about composition and family dynamics, a task to be faced by health professionals committed to the care, being the genogram a viable and important tool in this process.O estudo objetiva caracterizar a composição familiar de pais adolescentes em João Pessoa-PB. Trata-se de um recorte de pesquisa multicêntrica desenvolvida na PB, RS e SC. Os sujeitos foram dez pais adolescentes, residentes no perímetro urbano de João Pessoa. A coleta de dados ocorreu de dezembro de 2008 a outubro de 2010, por meio de entrevista semiestruturada e construção do genograma e ecomapa. A idade dos participantes variou de 16 a 19 anos. Todos viviam com a companheira; a maioria apresentava baixa escolarização. Os desempregados e os de renda abaixo de um salário mínimo indicaram a família como mantenedora do lar. A maioria ainda dependia da moradia de outros familiares

  2. Solid state electrolyte composites based on complex hydrides and metal doped fullerenes/fulleranes for batteries and electrochemical applications

    Science.gov (United States)

    Zidan, Ragaiy; Teprovich, Jr., Joseph A.; Colon-Mercado, Hector R.; Greenway, Scott D.

    2018-05-01

    A LiBH4--C60 nanocomposite that displays fast lithium ionic conduction in the solid state is provided. The material is a homogenous nanocomposite that contains both LiBH4 and a hydrogenated fullerene species. In the presence of C60, the lithium ion mobility of LiBH4 is significantly enhanced in the as prepared state when compared to pure LiBH4. After the material is annealed the lithium ion mobility is further enhanced. Constant current cycling demonstrated that the material is stable in the presence of metallic lithium electrodes. The material can serve as a solid state electrolyte in a solid-state lithium ion battery.

  3. Participation of electronic excited states in the positronium formation mechanism in the Gd(III) pentakis (picrate) complexes with imidazolium countercations

    Energy Technology Data Exchange (ETDEWEB)

    Fulgêncio, F., E-mail: fefulgencio@gmail.com [Departam ento de Química – ICEx Universidade Federal de Minas Gerais – UFMG, Belo Horizonte, MG (Brazil); Borges, A.S. [Coordenadoria de Química e Biologia – Instituto Federal do Espírito Santos – IFES, Campus Vitória, ES (Brazil); Araújo, M.H. [Departam ento de Química – ICEx Universidade Federal de Minas Gerais – UFMG, Belo Horizonte, MG (Brazil); Brito, H.F. [Instituto de Química, Departamento de Química Fundamental, Universidade de São Paulo, São Paulo (Brazil); Oliveira, F.C. [Departamento de Metalurgia e Química, Centro Federal de Educação Tecnológica de Minas Gerais – CEFET-MG, Campus Timóteo, MG (Brazil); Ribeiro, T.; Windmöller, D. [Departam ento de Química – ICEx Universidade Federal de Minas Gerais – UFMG, Belo Horizonte, MG (Brazil); Magalhães, W.F., E-mail: welmag@ufmg.br [Departam ento de Química – ICEx Universidade Federal de Minas Gerais – UFMG, Belo Horizonte, MG (Brazil)

    2016-02-15

    In this work, positron annihilation lifetime (PALS) and optical spectroscopies measurements were performed on [Gd(pic){sub 2}(H{sub 2}O){sub 6}](pic)·6H{sub 2}O and on complexes of general formula C{sub 2}[Gd(pic){sub 5}], where pic corresponds to picrate ligands and C to the countercations butyl-methyl, hexyl-methyl, butyl-ethyl and butyl-butyl imidazoles. Since all of these complexes have high energy ligand-to-metal charge transfer states (LMCTS) but form low amounts of Positronium (Ps), the LMCTS do not act here as a mechanism that suppress luminescence nor prevents Ps formation. This result suggests that, besides LMCTS, other effects should also contribute to prevent Ps formation. The results indicate that the electron withdrawing –NO{sub 2} groups in the picrate ligand are responsible by the effect that prevents Ps formation. Also, a rough correlation between the ligands' triplet states lifetimes and Ps formation was observed. The insertion of electron donor groups (the imidazolium countercations) increased the ligands' first triplet excited states ({sup 3}π{sup ⁎}) lifetimes and Ps formation, indicating that these two spectroscopic parameters are correlated. Also, it is demonstrated that there is no clear correlation between Ps formation probability and the excitation energy of the ligands' first triplet excited states. The results were discussed in terms of the recently proposed Ps formation mechanism, named cybotactic correlated system kinetic mechanism (CCSKM), showing that the Ps formation process involves molecular excited states and is kinetically controlled. - Highlights: • PALS and optical spectroscopies measurements performed on Gd{sup 3+} complexes. • A correlation was obtained between the ligands' {sup 3}π{sup ⁎} lifetimes and Ps formation. • Electronegative groups increased the ligands' {sup 3}π{sup ⁎} lifetimes and Ps formation. • Results discussed in terms of a new Ps formation mechanism (ccskm).

  4. Elastic tunneling identification through crossings, anti-crossings and splitting of states in the complex electronic current of systems based on mesoscopic molecules

    Science.gov (United States)

    López, Luis I. A.; Mendoza, Michel; Ujevic, Sebastian

    2013-09-01

    We have systematically studied the conductance σ( E,B) and the electronic current line shapes J( V ex ) through complex mesoscopic molecules in an elastic resonant tunneling regime. The studied systems are based on GaAs/AlGaAs hetero-structures, with several discrete states in each coupled mesoscopic molecule. The molecules were formed using different wells and barrier widths. These systems allow effective couplings and uncouplings that lead to elastic processes as a function of the electronic potential V ex and magnetic field B. In this situation, the J( V ex ) and σ( E, B) curves exhibit a sequence of peaks of difficult interpretation, in which crossings and anti-crossings (a splitting if it is generated in the resonance condition) of states contribute in a way that they cannot be easily identified. Performing a systematic analysis of the evolution of these states (before the resonance condition), we were able to determine the origin of these current peaks. We have found that the coupling of states (anti-crossing) around the resonance region can be identified as a broad mirrored- D line shape in the J( V ex ) curves. The mirrored- D line shape peaks can be clearly differentiated from the neighboring peaks because the last ones follow a very defined increasing sequence in their intensities and widths. Also, this behavior (fingerprint) can be used to identify possible splitting of states in the J( V ex ). The splittings that are generated between states with different quantum numbers (quantum numbers associated to the individual well) follow an unexpected opposite behavior when compared with those generated between states with the same quantum numbers (quasi-miniband). All these results are also observed in the conductance σ( E, B) associated with complex mesoscopic molecules based on a two-dimensional electron gas.

  5. The Sr:Ba:Rb ratio and zircon typology in granitoid complexes of Sao Paulo, Parana and Minas Gerais states (Brazil)

    International Nuclear Information System (INIS)

    Wernick, E.; Galembeck, T.M.B.; Artur, A.C.; Rigo Junior, L.; Weber-Diefenbach, K.

    1990-01-01

    Chemical (Sr: Ba: Rb) and zircon typology data from the Nazare Paulista, Mairipora/Cantareira, Cunhaporanga, Tres Corregos, Morungaba, Socorro, Itu, Graciosa and Serra Carambei granitoid complexes from the states of Minas Gerais, Sao Paulo and Parana (SE/S Brazil) are presented and discussed. By the zircon typology method these complexes are reffered, respectively, to the 2nd crustal, 3rd crustal/low temperature C-A, low temperature C-A, medium temperature C-A, medium/high temperature C-A, K-SA/Alkaline and alkaline serie which are considered as generated under increasing temperature associated with a progressive major participation of mantellic material. All these series, with the exception of the medium to high temperature calc-alkaline complexes Socorro and Morungaba whose chemical data come from several laboratories, display different positions and behaviour in the Sr: Ba: Rb diagram which reinforce the use of the zircon typology method in the study of granitoids. From the 2nd crustal serie up to the medium temperature C-A serie the complexes show a regular shift in their chemical composition which became progressively richer in Sr and depleted in Rb. The highly differentiades hypersolvus Serra do Carambei granite is strongly enriched in Rb and impoverish in Ba with respect to the Itu and the Graciosa complex which itself is slighly more depleted in Sr than the Itu granite. (author)

  6. Um olhar paradigmático sobre a Assistência de Enfermagem: um caminhar para o cuidado complexo Una mirada paradigmática en la atención de enfermería: un caminar para el cuidado complejo A paradigmatic glance on the nursing care: a to walk for the complex care

    Directory of Open Access Journals (Sweden)

    Ana Lúcia da Silva

    2003-12-01

    Full Text Available O texto aborda os paradigmas cartesiano (moderno e o da complexidade (pós-moderno de Edgar Morin objetivando aprofundar a reflexão sobre o tema e a compreensão do modo de assistir predominante na enfermagem. Para tanto, as autoras põem em discussão o modelo de assistência de enfermagem pautado no paradigma cartesiano definindo-o como produtor de uma assistência autoritária, fragmentada e linear. Apontam a necessidade de repensar esse modelo pelo fato de restringir a autonomia das pessoas/pacientes, caminhando na direção de um assistir pautado na complexidade, que proporciona condições de participação dos clientes/atores no planejamento dos cuidados à sua saúde.El texto aborda los paradigmas Cartesiano (moderno y el de la complejidad (post-moderno de Edgar Morin con el objetivo de profundizar en la reflexión sobre el tema y en la comprensión del modo de asistir predominante en enfermería. Para esto, los autores discuten el modelo de asistencia de enfermería pautado en el paradigma Cartesiano, definiéndolo como productor de una asistencia autoritaria, fragmentada y lineal. Señalan la necesidad de repensar sobre ese modelo por el hecho de restringir la autonomía de las personas/pacientes, caminando en dirección de un asistir basado en la complejidad, que proporciona condiciones de participación de los clientes/actores en la planificación de los cuidados a su salud.The text addresses the Cartesian paradigms (modern and the complexity paradigm (post-modern of Edgar Morin aiming to deepen reflection on the theme and understanding to improve nursing. To this end, the authors discuss the model of care of methodical nursing in the Cartesian paradigm defining it as producer of an authoritarian, fragmented and linear care. They point the need to rethink that model because it restricts the autonomy of the people/patient moving in the direction of complex care that provides for customers/actors' participation in their health care

  7. Photodynamic effect of light-harvesting, long-lived triplet excited state Ruthenium(II)-polyimine-coumarin complexes: DNA binding, photocleavage and anticancer studies.

    Science.gov (United States)

    Nomula, Raju; Wu, Xueyan; Zhao, Jianzhang; Munirathnam, Nagegownivari R

    2017-10-01

    Two coumarin based Ru II -polyimine complexes (Ru-1 and Ru-2) showing intense absorption of visible light and long-lived triplet excited states (~12-15μs) were used for study of the interaction with DNA. The binding of the complexes with CT-DNA were studied by UV-vis, fluorescence and time-resolved nanosecond transient absorption (ns-TA) spectroscopy. The results suggesting that the complexes interact with CT-DNA by intercalation mode of binding, showing the binding constants (K b ) 6.47×10 4 for Ru-1 and 5.94×10 4 M -1 for Ru-2, in contrast no such results were found for Ru-0. The nanosecond transient absorption spectra of these systems in the presence of CT-DNA showing a clear perturbation in the bleaching region was observed compare to buffer alone. Visible light photoirradiation DNA cleavage was investigated for these complexes by treating with the supercoiled pUC19 DNA and irradiated at 450nm. The reactive species produced upon irradiation of current agents is singlet oxygen ( 1 O 2 ), which results in the generation of other reactive oxygen species (ROS). The complexes shown efficient cleavage activity, converted complete supercoiled DNA to nicked circular at as low as 20μM concentration in 30min of light irradiation time. Significant amount of linear form was generated by Ru-1 at the same conditions. Even though Ru-0 has significant 1 O 2 quantum yield but shown lower cleavage activity compared to other two analogs is due the miserable interaction (binding) with DNA. The cytotoxicity in vitro of the complexes toward HeLa, BEL-7402 and MG-63 cells was assessed by MTT assay. The cellular uptake was observed on BEL-7402 cells under fluorescence microscope. The complexes shown appreciable cytotoxicity towards the cancer cell lines. Copyright © 2017 Elsevier B.V. All rights reserved.

  8. SIGNIFICADOS DE LA PALABRA “ESPARCIMIENTO” PARA ESTUDIANTES DE LA UNIVERSIDAD DE COSTA RICA Y DE MONTCLAIR STATE UNIVERSITY (THE MEANING OF THE WORD “LEISURE” FOR STUDENTS FROM THE UNIVERSITY OF COSTA RICA AND MONTCLAIR STATE UNIVERSITY

    Directory of Open Access Journals (Sweden)

    Juniu Susana

    2010-04-01

    Full Text Available Resumen:El esparcimiento y la recreación frecuentemente se definen de manera individual y, por lo tanto, no se entienden o interpretan universalmente. Los diferentes contextos culturales pueden originar distintas definiciones o significados de esparcimiento. El reto de las personas que estudian el esparcimiento es interpretarlo de tal forma que ayude a las personas a entender acerca de su valor en la calidad de vida. Por consiguiente, este estudio examinó el significado de esparcimiento para estudiantes de un curso de estudios generales de la Universidad de Costa Rica (UCR y de Montclair State University (MSU, una universidad estatal del noreste de Estados Unidos, en el I ciclo lectivo del 2009. Las personas participantes fueron 388 estudiantes (149 hombres y 240 mujeres, promedio edad = 21 años, DE = 3.3 del curso de Actividad Deportiva, de carreras de grado de ambas universidades. El estudiantado contestó el Inventario de Significados de Esparcimiento (Schulz y Watkins, 2007. Este cuestionario incluye cuatro categorías: pasar el tiempo, escapar de presiones, tomar decisiones y lograr autorrealización. En términos generales, las diferencias estadísticamente significativas entre los grupos universitarios se relacionaron con el concepto de esparcimiento como “pasar el tiempo” y “tomar decisiones”. Las percepciones de esparcimiento como “escapar de presiones” y “lograr autorrealización” sólo fueron el resultado de diferencias estadísticas significativas de casos específicos. Los resultados indican que los estudiantes de MSU tienden más a percibir esparcimiento como “pasar el tiempo” y “tomar decisiones” que la contraparte costarricense.Abstract:Leisure and recreation are frequently defined personally and individually, and therefore not understood or interpreted universally. Different cultural contexts may result in diverse definitions and meanings of leisure. The challenge for leisure researchers is to

  9. Adaptación al idioma español de la escala del Penn State College of Medicine para medición del profesionalismo en estudiantes de medicina

    Directory of Open Access Journals (Sweden)

    Eliseo Bustamante

    2014-06-01

    Full Text Available Introducción. El profesionalismo es un área de interés en las facultades de medicina del mundo. El uso de un cuestionario puede ser útil para evaluar el profesionalismo en Colombia. Objetivo. Adaptar la escala de profesionalismo para estudiantes de medicina del Penn State University College of Medicine al idioma español como instrumento válido para evaluarlo. Materiales y métodos. Se siguieron las guías para adaptación de instrumentos del proyecto IQOLA, realizando traducción y traducción inversa, así como una prueba piloto y una evaluación de las características psicométricas en 250 estudiantes. Se evaluó la correlación entre ítems y escala y la validez interna con el alfa de Chronbach y se hizo un análisis factorial de componentes principales. Resultados. El alfa de Cronbach global fue de 0,86, la medida de Kaiser-Meyer-Olkin fue de 0,83 y el test de esfericidad de Bartlett tuvo un valor de p>0,00001. Se encontraron seis factores que explicaron 93 % de la varianza total y cuatro nuevos factores que emergieron del análisis factorial. Ocho ítems tuvieron alta singularidad. Conclusión. La escala del Penn State University College of Medicine mide con buen nivel de confiabilidad las actitudes hacia el profesionalismo en los estudiantes de medicina. No obstante, la estructura de la escala mostró diferencias al ser validada en estudiantes latinoamericanos.

  10. Correlation of Solid State and Solution Coordination Numbers with Infrared Spectroscopy in Five-, Six-, and Eight-Coordinate Transition Metal Complexes of DOTAM.

    Science.gov (United States)

    Nagata, Maika K C T; Brauchle, Paul S; Wang, Sen; Briggs, Sarah K; Hong, Young Soo; Laorenza, Daniel W; Lee, Andrea G; Westmoreland, T David

    2016-08-16

    Three new DOTAM (1,4,7,10-tetrakis(acetamido)-1,4,7,10-tetraazacyclododecane) complexes have been synthesized and characterized by X-ray crystallography: [Co(DOTAM)]Cl 2 •3H 2 O, [Ni(DOTAM)]Cl 2 •4H 2 O, and [Cu(DOTAM)](ClO 4 ) 2 •H 2 O. Solid state and solution IR spectroscopic features for a series of [M(DOTAM)] 2+ complexes (M=Mn, Co, Cu, Ni, Ca, Zn) correlate with solid state and solution coordination numbers. [Co(DOTAM)] 2+ , [Ni(DOTAM)] 2+ , and [Zn(DOTAM)] 2+ are demonstrated to be six-coordinate in both the solid state and in solution, while [Mn(DOTAM)] 2+ and [Ca(DOTAM)] 2+ are eight-coordinate in the solid state and remain so in solution. [Cu(DOTAM)] 2+ , which is five-coordinate by X-ray crystallography, is shown to increase its coordination number in solution to six-coordinate.

  11. United States Support Programme (USSP): Lessons Learned from the Management of Complex, Multi-Stakeholder Projects for International Safeguards

    International Nuclear Information System (INIS)

    Diaz, R.; Tackentien, J.

    2015-01-01

    This paper will review USSP experiences, lessons learned, and proposed future strategies on the management of complex projects including the Universal Non-Destructive Assay Data Acquisition Platform (UNAP) instrument development task. The focus will be on identifying lessons learned to formulate strategies to minimize risk and maximize the potential of commercial success for future complex projects. Topics planned for inclusion are: 1. Initial agreement amongst all stakeholders on the justification of the need of the development including market studies of existing/near term future COTS technology capabilities; 2. Initial confirmation that there is a market for the product other than the IAEA to reduce investment risk; 3. Agreement on an accelerated initial project schedule from request acceptance to commercial unit production including per unit cost and quantities; 4. During product development, obtaining periodic customer reaffirmation of the need and quantities for the product per the existing schedule and per unit price. (author)

  12. The energetic state of mitochondria modulates complex III biogenesis through the ATP-dependent activity of Bcs1.

    Science.gov (United States)

    Ostojić, Jelena; Panozzo, Cristina; Lasserre, Jean-Paul; Nouet, Cécile; Courtin, Florence; Blancard, Corinne; di Rago, Jean-Paul; Dujardin, Geneviève

    2013-10-01

    Our understanding of the mechanisms involved in mitochondrial biogenesis has continuously expanded during the last decades, yet little is known about how they are modulated to optimize the functioning of mitochondria. Here, we show that mutations in the ATP binding domain of Bcs1, a chaperone involved in the assembly of complex III, can be rescued by mutations that decrease the ATP hydrolytic activity of the ATP synthase. Our results reveal a Bcs1-mediated control loop in which the biogenesis of complex III is modulated by the energy-transducing activity of mitochondria. Although ATP is well known as a regulator of a number of cellular activities, we show here that ATP can be also used to modulate the biogenesis of an enzyme by controlling a specific chaperone involved in its assembly. Our study further highlights the intramitochondrial adenine nucleotide pool as a potential target for the treatment of Bcs1-based disorders. Copyright © 2013 Elsevier Inc. All rights reserved.

  13. The Pagoda Sequence: a Ramble through Linear Complexity, Number Walls, D0L Sequences, Finite State Automata, and Aperiodic Tilings

    Directory of Open Access Journals (Sweden)

    Fred Lunnon

    2009-06-01

    Full Text Available We review the concept of the number wall as an alternative to the traditional linear complexity profile (LCP, and sketch the relationship to other topics such as linear feedback shift-register (LFSR and context-free Lindenmayer (D0L sequences. A remarkable ternary analogue of the Thue-Morse sequence is introduced having deficiency 2 modulo 3, and this property verified via the re-interpretation of the number wall as an aperiodic plane tiling.

  14. The complex synthesis and solid state chemistry of ceria-lanthana solid solutions prepared via a hexamethylenetetramine precipitation

    International Nuclear Information System (INIS)

    Fleming, P.G.; Holmes, J.D.; Otway, D.J.; Morris, M.A.

    2011-01-01

    Mixed oxide solid solutions are becoming ever more commercially important across a range of applications. However, their synthesis can be problematical. Here, we show that ceria-lanthana solid solutions can be readily prepared via simple precipitation using hexamethylenetetramine. However, the solution chemistry can be complex, which results in the precipitated particles having a complex structure and morphology. Great care must be taken in both the synthesis and characterisation to quantify the complexity of the product. Even very high heat treatments were not able to produce highly homogeneous materials and X-ray diffractions reveals the non-equilibrium form of particles prepared in this way. Unexpected crystal structures are revealed including a new metastable cubic La 2 O 3 phase. - Graphical abstract: The suggested mechanism for the formation of dual fluorite phase particles, where Step 1 corresponds to room temperature aging, Step 2; heating the solution to 90 deg. C, Step 3; cooling of the solution to room temperature, Step 4; calcination to 500 deg. C, Step 5; calcination to 700 deg. C and Step 6; calcination to 1300 deg. C. The terminology of e.g. La 1-x Ce x (OH) 3 is used to indicate the formation of a mixed oxy-hydroxy participate rather than a definitive assignment of stoichiometry. Similarly, La 1-y Ce y O 2 only implies a mixed solid solution. Highlights: → Mol% of prepared Ce-La oxides did not follow that of reactant mol%. → Complex reaction pathway found to be dependent on metal solution concentrations. → At certain concentrations core shell particles were found to form. → A reaction model was produced based on cationic solubility. → Report lanthana solubility higher than previously reported in CeO 2 .

  15. ESTIMATIVA DAS EROSIVIDADES ANUAIS E MAPEAMENTO PARA O ESTADO DO CEARÁ/ Estimation of erosivity annual and mapping for the State of Ceará

    Directory of Open Access Journals (Sweden)

    Jacques Carvalho Ribeiro Filho

    2017-12-01

    Full Text Available A erosão hídrica tem apresentado elevado potencial de redução na capacidade produtiva dos solos além de ocasionar problemas ambientais relacionados ao assoreamento e poluição dos recursos hídricos. Entre os diversos fatores ligados à erosão, a erosividade das chuvas é um dos mais importantes. O potencial da chuva para gerar erosão do solo é conhecido como erosividade, sendo sua estimativa fundamental para a compreensão da vulnerabilidade do recurso solo de uma determinada região. Nesse sentido, o trabalho objetiva especializar as informações de erosividade anual das chuvas para o Estado do Ceará-Brasil. O Estado do Ceará está subdividido em 12 bacias hidrográficas, para uma melhor gestão dos recursos hídricos de cada região. Com área total de 148.825,6 km², o estado apresenta a 1,75% do território nacional. O uso da geoestatística mostrou-se adequado para a mensuração da dependência espacial da chuva e erosividade para o Estado do Ceará, tendo o modelo teórico exponencial apresentadou melhor resultado. Constatou-se que as maiores alturas pluviométricas e índices de erosividade foram registrados nas bacias do litoral, já as menores, na área mais central do Estado do Ceará. Quanto. à erosividade, nota-se que a região litorânea classifica-se como alta (7.000 < R < 9.000 MJ mm ha-1 h-1 ano-1, já o restante do estado classifica-se como média (5.000 < R < 7.000 MJ mm ha-1 h-1 ano-1.

  16. Para-equilibrium phase diagrams

    International Nuclear Information System (INIS)

    Pelton, Arthur D.; Koukkari, Pertti; Pajarre, Risto; Eriksson, Gunnar

    2014-01-01

    Highlights: • A rapidly cooled system may attain a state of para-equilibrium. • In this state rapidly diffusing elements reach equilibrium but others are immobile. • Application of the Phase Rule to para-equilibrium phase diagrams is discussed. • A general algorithm to calculate para-equilibrium phase diagrams is described. - Abstract: If an initially homogeneous system at high temperature is rapidly cooled, a temporary para-equilibrium state may result in which rapidly diffusing elements have reached equilibrium but more slowly diffusing elements have remained essentially immobile. The best known example occurs when homogeneous austenite is quenched. A para-equilibrium phase assemblage may be calculated thermodynamically by Gibbs free energy minimization under the constraint that the ratios of the slowly diffusing elements are the same in all phases. Several examples of calculated para-equilibrium phase diagram sections are presented and the application of the Phase Rule is discussed. Although the rules governing the geometry of these diagrams may appear at first to be somewhat different from those for full equilibrium phase diagrams, it is shown that in fact they obey exactly the same rules with the following provision. Since the molar ratios of non-diffusing elements are the same in all phases at para-equilibrium, these ratios act, as far as the geometry of the diagram is concerned, like “potential” variables (such as T, pressure or chemical potentials) rather than like “normal” composition variables which need not be the same in all phases. A general algorithm to calculate para-equilibrium phase diagrams is presented. In the limit, if a para-equilibrium calculation is performed under the constraint that no elements diffuse, then the resultant phase diagram shows the single phase with the minimum Gibbs free energy at any point on the diagram; such calculations are of interest in physical vapor deposition when deposition is so rapid that phase

  17. Characterization of the low-temperature triplet state of chlorophyll in photosystem II core complexes: Application of phosphorescence measurements and Fourier transform infrared spectroscopy.

    Science.gov (United States)

    Zabelin, Alexey A; Neverov, Konstantin V; Krasnovsky, Alexander A; Shkuropatova, Valentina A; Shuvalov, Vladimir A; Shkuropatov, Anatoly Ya

    2016-06-01

    Phosphorescence measurements at 77 K and light-induced FTIR difference spectroscopy at 95 K were applied to study of the triplet state of chlorophyll a ((3)Chl) in photosystem II (PSII) core complexes isolated from spinach. Using both methods, (3)Chl was observed in the core preparations with doubly reduced primary quinone acceptor QA. The spectral parameters of Chl phosphorescence resemble those in the isolated PSII reaction centers (RCs). The main spectral maximum and the lifetime of the phosphorescence corresponded to 955±1 nm and of 1.65±0.05 ms respectively; in the excitation spectrum, the absorption maxima of all core complex pigments (Chl, pheophytin a (Pheo), and β-carotene) were observed. The differential signal at 1667(-)/1628(+)cm(-1) reflecting a downshift of the stretching frequency of the 13(1)-keto C=O group of Chl was found to dominate in the triplet-minus-singlet FTIR difference spectrum of core complexes. Based on FTIR results and literature data, it is proposed that (3)Chl is mostly localized on the accessory chlorophyll that is in triplet equilibrium with P680. Analysis of the data suggests that the Chl triplet state responsible for the phosphorescence and the FTIR difference spectrum is mainly generated due to charge recombination in the reaction center radical pair P680(+)PheoD1(-), and the energy and temporal parameters of this triplet state as well as the molecular environment and interactions of the triplet-bearing Chl molecule are similar in the PSII core complexes and isolated PSII RCs. Copyright © 2016 Elsevier B.V. All rights reserved.

  18. Fungos anamórficos (Hyphomycetes da Chapada Diamantina: novos registros para o Estado da Bahia e Brasil Anamorphic fungi (Hyphomycetes from the Chapada Diamantina: new records from Bahia State and Brazil

    Directory of Open Access Journals (Sweden)

    Alisson Cardoso Rodrigues da Cruz

    2007-12-01

    Full Text Available (Fungos anamórficos (Hyphomycetes da Chapada Diamantina: novos registros para o Estado da Bahia e Brasil. Os fungos anamórficos, caracterizados pela produção de estruturas de reprodução assexuadas, são habitantes comuns do folhedo onde desempenham papel importante na decomposição. O objetivo deste trabalho foi realizar um inventário dos fungos anamórficos associados ao folhedo de plantas da Chapada Diamantina, BA. Foram realizadas 13 expedições, de dezembro/2002 a outubro/2003, para coleta de folhedo. Para verificação da presença de fungos anamórficos o material foi submetido à técnica de lavagem sucessiva com água destilada esterilizada e posteriormente incubado em câmaras-úmidas. Lâminas permanentes com as estruturas reprodutivas dos espécimes foram confeccionadas com resina PVL e depositadas no herbário HUEFS. Das 57 espécies de fungos anamórficos identificados, nove constituem novas ocorrências para o Estado da Bahia e cinco para o Brasil: Fusariella atrovirens (Berk. Sacc., Kiliophora ubiensis (Caneva & Rambelli Kuthub. & Nawawi, Paraceratocladium silvestre Castañeda, Pleurotheciopsis setiformis Castañeda e Triscelophorus deficiens (Matsush. Matsush. Incluem-se comentários e distribuição geográfica dos novos registros para o Estado da Bahia; descrições e ilustrações são apresentadas para as novas ocorrências para o Brasil.(Anamorphic fungi (Hyphomycetes from the Chapada Diamantina: new records from Bahia State and Brazil. The anamorphic fungi are characterized by production of asexual reproductive structures and are common inhabitants of the leaf litter, where they play an important role in decomposition. The aim of this work was to survey the anamorphic fungi associated with leaf litter from Chapada Diamantina, B ahia state. Thirteen expeditions took place from December/2002 to October/2003 to collect leaf litter. The serial washing technique with sterile distilled water followed by incubation in

  19. The role of the state in a universalization of energy services for isolated communities; O papel do estado na universalizacao dos servicos de energia para comunidades isoladas

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Maria Julita Guerra [Secretaria de Estado de Energia, Recursos Hidricos e Saneamento (SERHS), Sao Paulo, SP (Brazil)], e-mail: mjulita@sp.gov.br; Andrade, Adnei Melges de [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica. Lab. de Microeletronica], email: adnei@lme.usp.br

    2004-07-01

    This work is dedicated to the discussion of inherent questions to the energy supply to isolated communities in the frame of the current policy of extension of modern energy options to all citizens (the access and the use of the energy), through the program 'Luz para Todos'. It still presents the adequacy of the proposal presented at the Agrener-2002 (FERREIRA and ANDRADE, 2002) to the new guidelines of the Brazilian electric sector for electrification on rural communities. (author)

  20. The role of the state in a universalization of energy services for isolated communities; O papel do estado na universalizacao dos servicos de energia para comunidades isoladas

    Energy Technology Data Exchange (ETDEWEB)

    Ferreira, Maria Julita Guerra [Secretaria de Estado de Energia, Recursos Hidricos e Saneamento (SERHS), Sao Paulo, SP (Brazil)], e-mail: mjulita@sp.gov.br; Andrade, Adnei Melges de [Universidade de Sao Paulo (USP), SP (Brazil). Escola Politecnica. Lab. de Microeletronica], email: adnei@lme.usp.br

    2004-07-01

    This work is dedicated to the discussion of inherent questions to the energy supply to isolated communities in the frame of the current policy of extension of modern energy options to all citizens (the access and the use of the energy), through the program 'Luz para Todos'. It still presents the adequacy of the proposal presented at the Agrener-2002 (FERREIRA and ANDRADE, 2002) to the new guidelines of the Brazilian electric sector for electrification on rural communities. (author)

  1. The solid molecular hydrogens in the ordered state as function of density and ortho-para concentration: a far infrared study

    International Nuclear Information System (INIS)

    Jochemsen, R.

    1978-01-01

    In this thesis, the results of far infrared absorption experiments on solid molecular hydrogen and deuterium are presented. In Chapter I an introduction to the properties of solid molecular hydrogens in given. The experimental system used for the high pressure infrared measurements and the data handling procedures are discussed in Chapter II. The theory of infrared absorption and the averaging of the dipole moment over the motion of the molecules is contained in Chapter III. In this chapter a general sum rule for the integrated absorption is derived. The remaining chapters present the results of the measurements and the discussion. In Chapter IV the author concentrates on the phonon frequencies as a function of ortho-para concentration and density, while in Chapter V measuremtns of phonon lineshape and integrated absorption intensities are presented. Finally, in Chapter VI, a study is given of the phase transition in solid hydrogen and deuterium. This study provides accurate values for the transition temperature as a function of density (in deuterium) and as a function of ortho-para concentration (in hydrogen) as well as the dependence of the order parameter on the temperature and the ortho-para concentration. (Auth.)

  2. Potencial agroclimático para a cultura da acerola no Estado de Minas Gerais Agroclimatic potential for the West Indian Cherry cropping in the State of Minas Gerais

    Directory of Open Access Journals (Sweden)

    Maria J. H. de Souza

    2006-06-01

    Full Text Available Objetivou-se realizar o zoneamento agroclimático do Estado de Minas Gerais, visando dar subsídios à seleção de locais para a implantação da cultura da acerola (Malpighia glabra L.. Utilizaram-se dados de temperatura média e precipitação de 110 estações meteorológicas de Minas Gerais e de Estados circunvizinhos; com base nesses dados calculou-se o índice de umidade de Thornthwaite & Mather para uma capacidade de armazenamento de água no solo de 125 mm. Elaboraram-se mapas de aptidão térmica e hídrica, a partir da temperatura média e do índice de umidade, para essa cultura, com a sobreposição dos mapas, obteve-se o mapa de aptidão agroclimática do Estado para a cultura da acerola. Cerca de 12,6% do território de Minas Gerais, região sul, e uma pequena parte da região central, são inaptos para o cultivo da aceroleira, devido à ocorrência de baixas temperaturas. Em 55,8% do Estado observam-se condições favoráveis para o cultivo da aceroleira enquanto em 4,5% as condições são regulares. Áreas com aptidão restrita compreendem 27% do Estado, sendo que em 18% o cultivo é recomendado somente com o emprego de irrigação, devido à restrição hídrica, enquanto nos outros 9% o cultivo é limitado pelo excedente hídrico.This study aimed to accomplish the agroclimatic zoning of Minas Gerais State, in order to provide subsidies for selection of areas for implantation of the West Indian Cherry (Malpighia glabra L. crop. The average temperature and precipitation data relative to 110 meteorological stations located in Minas Gerais and surrounding states were used. Based on these data, the moisture index by Thornthwaite & Mather for a soil water storage capacity of 125 mm was calculated. The thermal and hydric aptitude maps were drawn for the crop from the average temperature and moisture index. The State agroclimatic aptitude map was obtained by superposing these maps. It was found that only 12.6% of the state territory

  3. Solid-state flurbiprofen and methyl-β-cyclodextrin inclusion complexes prepared using a single-step, organic solvent-free supercritical fluid process.

    Science.gov (United States)

    Rudrangi, Shashi Ravi Suman; Kaialy, Waseem; Ghori, Muhammad U; Trivedi, Vivek; Snowden, Martin J; Alexander, Bruce David

    2016-07-01

    The aim of this study was to enhance the apparent solubility and dissolution properties of flurbiprofen through inclusion complexation with cyclodextrins. Especially, the efficacy of supercritical fluid technology as a preparative technique for the preparation of flurbiprofen-methyl-β-cyclodextrin inclusion complexes was evaluated. The complexes were prepared by supercritical carbon dioxide processing and were evaluated by solubility, differential scanning calorimetry, X-ray powder diffraction, scanning electron microscopy, practical yield, drug content estimation and in vitro dissolution studies. Computational molecular docking studies were conducted to study the possibility of molecular arrangement of inclusion complexes between flurbiprofen and methyl-β-cyclodextrin. The studies support the formation of stable molecular inclusion complexes between the drug and cyclodextrin in a 1:1 stoichiometry. In vitro dissolution studies showed that the dissolution properties of flurbiprofen were significantly enhanced by the binary mixtures prepared by supercritical carbon dioxide processing. The amount of flurbiprofen dissolved into solution alone was very low with 1.11±0.09% dissolving at the end of 60min, while the binary mixtures processed by supercritical carbon dioxide at 45°C and 200bar released 99.39±2.34% of the drug at the end of 30min. All the binary mixtures processed by supercritical carbon dioxide at 45°C exhibited a drug release of more than 80% within the first 10min irrespective of the pressure employed. The study demonstrated the single step, organic solvent-free supercritical carbon dioxide process as a promising approach for the preparation of inclusion complexes between flurbiprofen and methyl-β-cyclodextrin in solid-state. Copyright © 2016 Elsevier B.V. All rights reserved.

  4. Capturing the photo-signaling state of a photoreceptor in a steady-state fashion by binding a transition metal complex.

    Science.gov (United States)

    Yu, Pengyun; Song, Lei; Qin, Jun; Wang, Jianping

    2017-11-01

    Binding a small molecule to proteins causes conformational changes, but often to a limited extent. Here, we demonstrate that the interaction of a CO-releasing molecule (CORM3) with a photoreceptor photoactive yellow protein (PYP) drives large structural changes in the latter. The interaction of CORM3 and a mutant of PYP, Met100Ala, not only trigger the isomerization of its chromophore, p-coumaric acid, from its anionic trans configuration to a protonated cis configuration, but also increases the content of β-sheet at the cost of α-helix and random coil in the secondary structure of the protein. The CORM3 derived Met100Ala is found to highly resemble the signaling state, which is one of the key photo-intermediates of this photoactive protein, in both protein local conformation and chromophore configuration. The organometallic reagents hold promise as protein engineering tools. This work highlights a novel approach to structurally accessing short lived intermediates of proteins in a steady-state fashion. © 2017 The Protein Society.

  5. Magmatism and fenitization in the Cretaceous potassium-alkaline-carbonatitic complex of Ipanema São Paulo State, Brazil

    Science.gov (United States)

    Guarino, Vincenza; Azzone, Rogério Guitarrari; Brotzu, Pietro; de Barros Gomes, Celso; Melluso, Leone; Morbidelli, Lucio; Ruberti, Excelso; Tassinari, Colombo Celso Gaeta; Brilli, Mauro

    2012-01-01

    The Ipanema alkaline-carbonatitic complex is part of the Meso-Cenozoic alkaline magmatism located within the southeastern part of the Brazilian Platform. Drill-core and field sampling have indicated the occurrence of glimmerites, with subordinate shonkinites (mela-syenites), clinopyroxene-bearing glimmerites, diorites and syenites. The glimmerites are cross-cut by lamprophyric dykes and calciocarbonatites. Fenitization has deeply affected the country rocks, originating dioritic and syenitic rocks. The Ipanema rocks show a distinct potassic affinity. The initial Sr-Nd- isotopic composition of the Ipanema rocks (87Sr/86Sr = 0.70661-0.70754 and 143Nd/144Nd = 0.51169-0.51181) is similar to that of tholeiitic and potassium-rich-alkaline rocks of the Eastern Paraguay. Stable isotope data for the Ipanema calciocarbonatite suggest interaction with fluids at temperatures typical of hydrothermal stages, as hypothesized for other carbonatite complexes from southeastern Brazil. The chemical differences between the lamprophyre, glimmerites, carbonatites, apatitites and magnetitites, and the absence of marked REE enrichment in the evolved lithologies, all indicate that fractional crystallization and accumulus of liquidus phases in a magma reservoir, likely coupled with liquid immiscibility processes, may have played an important role in the genesis of the Ipanema rocks.

  6. A thermogravimetric analysis (TGA) method developed for estimating the stoichiometric ratio of solid-state {alpha}-cyclodextrin-based inclusion complexes

    Energy Technology Data Exchange (ETDEWEB)

    Bai, Yuxiang; Wang, Jinpeng; Bashari, Mohanad; Hu, Xiuting [The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122 (China); Feng, Tao [School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418 (China); Xu, Xueming [The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122 (China); Jin, Zhengyu, E-mail: jinlab2008@yahoo.com [The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122 (China); Tian, Yaoqi, E-mail: yqtian@jiangnan.edu.cn [The State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122 (China)

    2012-08-10

    Highlights: Black-Right-Pointing-Pointer We develop a TGA method for the measurement of the stoichiometric ratio. Black-Right-Pointing-Pointer A series of formulas are deduced to calculate the stoichiometric ratio. Black-Right-Pointing-Pointer Four {alpha}-CD-based inclusion complexes were successfully prepared. Black-Right-Pointing-Pointer The developed method is applicable. - Abstract: An approach mainly based on thermogravimetric analysis (TGA) was developed to evaluate the stoichiometric ratio (SR, guest to host) of the guest-{alpha}-cyclodextrin (Guest-{alpha}-CD) inclusion complexes (4-cresol-{alpha}-CD, benzyl alcohol-{alpha}-CD, ferrocene-{alpha}-CD and decanoic acid-{alpha}-CD). The present data obtained from Fourier transform-infrared (FT-IR) spectroscopy showed that all the {alpha}-CD-based inclusion complexes were successfully prepared in a solid-state form. The stoichiometric ratios of {alpha}-CD to the relative guests (4-cresol, benzyl alcohol, ferrocene and decanoic acid) determined by the developed method were 1:1, 1:2, 2:1 and 1:2, respectively. These SR data were well demonstrated by the previously reported X-ray diffraction (XRD) method and the NMR confirmatory experiments, except the SR of decanoic acid with a larger size and longer chain was not consistent. It is, therefore, suggested that the TGA-based method is applicable to follow the stoichiometric ratio of the polycrystalline {alpha}-CD-based inclusion complexes with smaller and shorter chain guests.

  7. A thermogravimetric analysis (TGA) method developed for estimating the stoichiometric ratio of solid-state α-cyclodextrin-based inclusion complexes

    International Nuclear Information System (INIS)

    Bai, Yuxiang; Wang, Jinpeng; Bashari, Mohanad; Hu, Xiuting; Feng, Tao; Xu, Xueming; Jin, Zhengyu; Tian, Yaoqi

    2012-01-01

    Highlights: ► We develop a TGA method for the measurement of the stoichiometric ratio. ► A series of formulas are deduced to calculate the stoichiometric ratio. ► Four α-CD-based inclusion complexes were successfully prepared. ► The developed method is applicable. - Abstract: An approach mainly based on thermogravimetric analysis (TGA) was developed to evaluate the stoichiometric ratio (SR, guest to host) of the guest–α-cyclodextrin (Guest-α-CD) inclusion complexes (4-cresol-α-CD, benzyl alcohol-α-CD, ferrocene-α-CD and decanoic acid-α-CD). The present data obtained from Fourier transform-infrared (FT-IR) spectroscopy showed that all the α-CD-based inclusion complexes were successfully prepared in a solid-state form. The stoichiometric ratios of α-CD to the relative guests (4-cresol, benzyl alcohol, ferrocene and decanoic acid) determined by the developed method were 1:1, 1:2, 2:1 and 1:2, respectively. These SR data were well demonstrated by the previously reported X-ray diffraction (XRD) method and the NMR confirmatory experiments, except the SR of decanoic acid with a larger size and longer chain was not consistent. It is, therefore, suggested that the TGA-based method is applicable to follow the stoichiometric ratio of the polycrystalline α-CD-based inclusion complexes with smaller and shorter chain guests.

  8. Two conformational states of the membrane-associated Bacillus thuringiensis Cry4Ba δ-endotoxin complex revealed by electron crystallography: Implications for toxin-pore formation

    International Nuclear Information System (INIS)

    Ounjai, Puey; Unger, Vinzenz M.; Sigworth, Fred J.; Angsuthanasombat, Chanan

    2007-01-01

    The insecticidal nature of Cry δ-endotoxins produced by Bacillus thuringiensis is generally believed to be caused by their ability to form lytic pores in the midgut cell membrane of susceptible insect larvae. Here we have analyzed membrane-associated structures of the 65-kDa dipteran-active Cry4Ba toxin by electron crystallography. The membrane-associated toxin complex was crystallized in the presence of DMPC via detergent dialysis. Depending upon the charge of the adsorbed surface, 2D crystals of the oligomeric toxin complex have been captured in two distinct conformations. The projection maps of those crystals have been generated at 17 A resolution. Both complexes appeared to be trimeric; as in one crystal form, its projection structure revealed a symmetrical pinwheel-like shape with virtually no depression in the middle of the complex. The other form revealed a propeller-like conformation displaying an obvious hole in the center region, presumably representing the toxin-induced pore. These crystallographic data thus demonstrate for the first time that the 65-kDa activated Cry4Ba toxin in association with lipid membranes could exist in at least two different trimeric conformations, conceivably implying the closed and open states of the pore

  9. Un Nuevo Convenio para el Aprendizaje: Una Sociedad para Mejorar los Resultados Educativos en el Estado de Nueva York (A New Compact for Learning: A Partnership To Improve Educational Results in New York State).

    Science.gov (United States)

    New York State Education Dept., Albany. Office of Elementary, Middle and Secondary Education.

    This Spanish translation of the abridged version of "A New Compact for Learning" acknowledges the current U.S. education system's inadequacy to educate U.S. citizenry and introduces New York State's New Compact for Learning, intended as a plan to reorganize New York's own system. The compact's fundamental principles are: (1) recognizing…

  10. Study on the viability for the implantation of a hydrogen-solar-aeolian system for the state of Ceara, Brazil; Estudo de viabilidade para implantacao de um sistema a hidrogenio-solar-eolico para o estado do Ceara, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Sales, A.D.; Sacramento, E.M. do; Lima, L.C. de [Universidade Estadual do Ceara (UECE), Fortaleza, CE (Brazil)

    2008-07-01

    The state of the Ceara imports most of its consumed energy, configuring itself as a region eminently energy importer. However, the manufacture of its wind power Atlas demonstrated a high potential for the generation of electric energy originated from this renewable source. It is known, also, through studies, that this state possesses high potential for the exploitation of solar energy also for the generation of electric energy. A clean option to obtain hydrogen is the utilization of such renewable sources. This work presents results of the application of a model of solar-wind hydrogen energy for the Ceara state and variables such as population, gross intern product, energetic demand, energy imports, fossil fuel and hydrogen prices, income from hydrogen sale, and others parameters. The hydrogen will be produced from the sea water desalinisation, using solar and wind energies. The produced hydrogen eventually will be introduced in Ceara State through three scenarios which are one of, fast introduction, other of slow introduction and other of no introduction of hydrogen. (author)

  11. Serosurvey of Rickettsia spp. in dogs and humans from an endemic area for Brazilian spotted fever in the State of São Paulo, Brazil Sorologia para Rickettsia spp. em cães e humanos de uma área endêmica para febre maculosa brasileira no Estado de São Paulo, Brasil

    Directory of Open Access Journals (Sweden)

    Adriano Pinter

    2008-02-01

    Full Text Available The present study provides a rickettsial serosurvey in 25 dogs and 35 humans in an endemic area for Brazilian spotted fever in the State of São Paulo, where the tick Amblyomma aureolatum is the main vector. Testing canine and human sera by indirect immunofluorescence against four Rickettsia antigens (R. rickettsii, R. parkeri, R. felis and R. bellii showed that 16 (64% of canine sera and 1 (2.8% of human sera reacted to at least one of these rickettsial antigens with titers ³ 64. Seven canine sera and the single reactive human serum showed titers to R. rickettsii at least four times those of any of the other three antigens. The antibody titers in these 7 animals and 1 human were attributed to stimulation by R. rickettsii infection. No positive canine or human serum was attributed to stimulation by R. parkeri, R. felis, or R. bellii. Our serological results showed that dogs are important sentinels for the presence of R. rickettsii in areas where the tick A. aureolatum is the main vector of Brazilian spotted fever.Este estudo avaliou a ocorrência de anticorpos anti-Rickettsia em 25 cães e 35 humanos, em uma área endêmica para a febre maculosa brasileira no Estado de São Paulo, onde o principal vetor é o carrapato Amblyomma aureolatum. Soros dos cães e humanos foram testados pela técnica de imunofluorescência indireta contra quatro antígenos de riquétsias (R. rickettsii, R. parkeri, R. felis, R. bellii, mostrando que soros de 16 (64% cães e 1 (2,8% humano reagiram com títulos ³ 64 para pelo menos um dos antígenos de riquétsias. Sete soros caninos e o único soro humano reativo demonstraram títulos para R. rickettsii no mínimo quatro vezes maior do que aqueles para os outros antígenos de riquétsias. Os títulos de anticorpos nesses cães e um humano foram considerados homólogos a R. rickettsii, enquanto que nenhum soro de cão ou humano foi considerado reativamente homólogo para R. parkeri, R. felis ou R. bellii. Os

  12. Phobias of attachment-related inner states in the psychotherapy of adult survivors of childhood complex trauma.

    Science.gov (United States)

    Liotti, Giovanni

    2013-11-01

    The clinical case described in this article illustrates the value of taking into account the dynamics of disorganized attachment in the assessment of attachment-related phobias (phobia of attachment and phobia of attachment loss) during the psychotherapy of chronically traumatized patients. These seemingly opposite phobias typically coexist in the same patient, appear as phobias of both inner states (affect phobias) and relational experiences, and are linked to dissociated representations of self-with-other. Theory and research on attachment disorganization provide a clinician-friendly conceptual framework for capturing both the intrapsychic (e.g., intrusive and nonintegrated mental states) and the relational (e.g., dramatic unsolvable dilemmas in interpersonal exchanges) aspects of the attachment-related phobias. The therapeutic strategy and the key interventions that logically follow from a case formulation based on this conceptual framework are examined. © 2013 Wiley Periodicals, Inc.

  13. Preliminary assessment of nuclear energy centers and energy systems complexes in the western United States. Final report

    International Nuclear Information System (INIS)

    Gottlieb, P.; Robinson, J.H.; Smith, D.R.

    1978-02-01

    The Nuclear Energy Center siting opportunities in the eleven western states have been systematically examined. The study area has been divided into 10-mile by 10-mile grid cells, and each cell has been evaluated in terms of overall suitability and site-related costs. Composite suitability consists of a weighted sum of ten important nuclear power plant siting issues; the particular weights used for this study were decided by a Delphi session of twenty individuals with energy facility siting expertise, with at least one representative from each of the eleven western states. Site-related costs consist of the additional expenditures required for seismic hardening (in seismically active areas), electric power transmission lines (for sites significantly far from load centers), and wet/dry cooling system costs

  14. Preliminary assessment of nuclear energy centers and energy systems complexes in the western United States. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Gottlieb, P.; Robinson, J.H.; Smith, D.R.

    1978-02-01

    The Nuclear Energy Center siting opportunities in the eleven western states have been systematically examined. The study area has been divided into 10-mile by 10-mile grid cells, and each cell has been evaluated in terms of overall suitability and site-related costs. Composite suitability consists of a weighted sum of ten important nuclear power plant siting issues; the particular weights used for this study were decided by a Delphi session of twenty individuals with energy facility siting expertise, with at least one representative from each of the eleven western states. Site-related costs consist of the additional expenditures required for seismic hardening (in seismically active areas), electric power transmission lines (for sites significantly far from load centers), and wet/dry cooling system costs (limited water availability and/or high summer temperatures).

  15. A multi-modal geological investigation framework for subsurface modeling and kinematic monitoring of a slow-moving landslide complex in Colorado, United States

    Science.gov (United States)

    Lowry, B. W.; Zhou, W.; Smartgeo

    2010-12-01

    The Muddy Creek landslide complex is a large area of active and reactivating landslides that impact the operation of both a state highway and Paonia Reservoir in Gunnison County, Colorado, United States. Historically, the monitoring of this slide has been investigated using disparate techniques leading to protracted analysis and project knowledge attrition. We present an integrated, data-driven investigation framework that supports continued kinematic monitoring, document cataloging, and subsurface modeling of the landslide complex. A geospatial information system (GIS) was integrated with a visual programming based subsurface model to facilitate modular integration of monitoring data with borehole information. Subsurface modeling was organized by material type and activity state based on multiple sources of kinematic measurement. The framework is constructed to modularly integrate remotely sensed imagery and other spatial datasets such as ASTER, InSAR, and LiDAR derived elevation products as more precise datasets become available. The framework allows for terrestrial LiDAR survey error estimation, borehole siting, and placement of wireless sensor (GPS, accelerometers, geophysical ) networks for optimized spatial relevance and utility. Coordinated spatial referencing within the GIS facilitates geotechnical and hydrogeological modeling input generation and common display of modeling outputs. Kinematic data fusion techniques are accomplished with integration of instrumentation, surficial feature tracking, subsurface classification, and 3D interpolation. The framework includes dynamic decision support including landslide dam failure estimates, back-flooding scenario planning that can be accessed by multiple agencies and stakeholders.

  16. Encapsulating model complexity and landscape-scale analyses of state-and-transition simulation models: an application of ecoinformatics and juniper encroachment in sagebrush steppe ecosystems

    Science.gov (United States)

    O'Donnell, Michael

    2015-01-01

    State-and-transition simulation modeling relies on knowledge of vegetation composition and structure (states) that describe community conditions, mechanistic feedbacks such as fire that can affect vegetation establishment, and ecological processes that drive community conditions as well as the transitions between these states. However, as the need for modeling larger and more complex landscapes increase, a more advanced awareness of computing resources becomes essential. The objectives of this study include identifying challenges of executing state-and-transition simulation models, identifying common bottlenecks of computing resources, developing a workflow and software that enable parallel processing of Monte Carlo simulations, and identifying the advantages and disadvantages of different computing resources. To address these objectives, this study used the ApexRMS® SyncroSim software and embarrassingly parallel tasks of Monte Carlo simulations on a single multicore computer and on distributed computing systems. The results demonstrated that state-and-transition simulation models scale best in distributed computing environments, such as high-throughput and high-performance computing, because these environments disseminate the workloads across many compute nodes, thereby supporting analysis of larger landscapes, higher spatial resolution vegetation products, and more complex models. Using a case study and five different computing environments, the top result (high-throughput computing versus serial computations) indicated an approximate 96.6% decrease of computing time. With a single, multicore compute node (bottom result), the computing time indicated an 81.8% decrease relative to using serial computations. These results provide insight into the tradeoffs of using different computing resources when research necessitates advanced integration of ecoinformatics incorporating large and complicated data inputs and models. - See more at: http://aimspress.com

  17. “Covalent Hydration” Reactions in Model Monomeric Ru 2,2'-Bipyridine Complexes: Thermodynamic Favorability as a Function of Metal Oxidation and Overall Spin States

    Energy Technology Data Exchange (ETDEWEB)

    Ozkanlar, Abdullah; Cape, Jonathan L.; Hurst, James K.; Clark, Aurora E.

    2011-09-05

    Density functional theory (DFT) has been used to investigate the plausibility of water addition to the simple mononuclear ruthenium complexes, [(NH{sub 3}){sub 3}(bpy)Ru=O]{sup 2+}/{sup 3+} and [(NH{sub 3}){sub 3}(bpy)RuOH]{sup 3+}, in which the OH fragment adds to the 2,2{prime}-bipyridine (bpy) ligand. Activation of bpy toward water addition has frequently been postulated within the literature, although there exists little definitive experimental evidence for this type of 'covalent hydration'. In this study, we examine the energetic dependence of the reaction upon metal oxidation state, overall spin state of the complex, as well as selectivity for various positions on the bipyridine ring. The thermodynamic favorability is found to be highly dependent upon all three parameters, with free energies of reaction that span favorable and unfavorable regimes. Aqueous addition to [(NH{sub 3}){sub 3}(bpy)Ru=O]{sup 3+} was found to be highly favorable for the S = 1/2 state, while reduction of the formal oxidation state on the metal center makes the reaction highly unfavorable. Examination of both facial and meridional isomers reveals that when bipyridine occupies the position trans to the ruthenyl oxo atom, reactivity toward OH addition decreases and the site preferences are altered. The electronic structure and spectroscopic signatures (EPR parameters and simulated spectra) have been determined to aid in recognition of 'covalent hydration' in experimental systems. EPR parameters are found to uniquely characterize the position of the OH addition to the bpy as well as the overall spin state of the system.

  18. Modeling of charge-transfer transitions and excited states in d6 transition metal complexes by DFT techniques

    Czech Academy of Sciences Publication Activity Database

    Vlček, Antonín; Záliš, Stanislav

    2007-01-01

    Roč. 251, 3-4 (2007), s. 258-287 ISSN 0010-8545 R&D Projects: GA MŠk 1P05OC068; GA MŠk OC 139 Institutional research plan: CEZ:AV0Z40400503 Keywords : charge-transfer transition * DFT technique * excited states * spectroscopy Subject RIV: CG - Electrochemistry Impact factor: 8.568, year: 2007

  19. Satellite remote sensing of landscape freeze/thaw state dynamics for complex Topography and Fire Disturbance Areas Using multi-sensor radar and SRTM digital elevation models

    Science.gov (United States)

    Podest, Erika; McDonald, Kyle; Kimball, John; Randerson, James

    2003-01-01

    We characterize differences in radar-derived freeze/thaw state, examining transitions over complex terrain and landscape disturbance regimes. In areas of complex terrain, we explore freezekhaw dynamics related to elevation, slope aspect and varying landcover. In the burned regions, we explore the timing of seasonal freeze/thaw transition as related to the recovering landscape, relative to that of a nearby control site. We apply in situ biophysical measurements, including flux tower measurements to validate and interpret the remotely sensed parameters. A multi-scale analysis is performed relating high-resolution SAR backscatter and moderate resolution scatterometer measurements to assess trade-offs in spatial and temporal resolution in the remotely sensed fields.

  20. Influence of physiologically active complex isolated from human amnion on lipid peroxide oxidation state and antioxidant activity of blood in rats after irradiation in different doses

    International Nuclear Information System (INIS)

    Borshchevs'ka, M.Yi.; Popov, V.V.; Abramova, L.P.; Kuz'myinova, Yi.A.

    1995-01-01

    The authors have studied the influence of physiologically active complex isolated from human amnion on the state of lipid peroxide oxidation according to diene conjugate and malonic dialdehyde amount and antioxidant enzyme activity (catalase and glutationperoxidase) in the blood of the rats exposed to single total irradiation in different doses (4 and 6 Gy) was studied. Definite changes of peroxide process intensity and reduction of the enzymes activity were shown to be observed in the blood of experimental animals even at long terms after the radiation exposure. Under the background of radiation exposure, administration of physiologically active complex isolated from human amnion produced protective effect on antioxidant enzyme activity which promoted normalization of peroxidation processes within the post-radiation period

  1. Índice climático de crescimento para gramíneas forrageiras no Estado de São Paulo Climatic growth index for forage grasses in the State of São Paulo (Brazil

    Directory of Open Access Journals (Sweden)

    Mário José Pedro Júnior

    1995-01-01

    Full Text Available Utilizou-se o índice climático de crescimento (ICC para gramíneas forrageiras, com base em temperatura, radiação solar e relação entre evapotranspiração real e potencial, a fim de estimar a produção de matéria seca (TAMS de capim-colonião, gordura, jaraguá e pangola através da seguinte equação exponencial: ICC = a EXP (b ICC, onde a e b são constantes que diferem para cada espécie. Determinou-se o índice climático médio mensal para 47 localidades paulistas e regiões limítrofes. A variação espacial do índice para o inverno e para o verão é apresentada em forma de mapas. Os valores de ICC no inverno, período crítico, variaram de 0,1 a 0,15 na região central do Estado; no Norte e no Oeste, foram superiores a 0,15 e, na Serra da Mantiqueira, inferiores a 0,1.The climatic growth index (ICC for forage grasses, based on temperature, solar radiation and the ratio of actual to potential evapotranspiration, was used to estimate dry matter production (TAMS for the following grasses: "colonião" (Panicum maximum Jacq, "gordura" (Melinis minutiflora Pal de Beauv, "jaraguá" (Hyparrhenia rufa (Ness Stapf and "pangola" (Digitaria pentzii Stent, using exponential equations: ICC = a EXP (b ICC, where a and b are constants which differ for each specie analised. The monthly mean climatic index was calculated for forty seven localities of the State of São Paulo and neighbours. Its spatial distribution considering summer and winter is shown as maps. ICC values during the critical season of the winter varied from 0.1 to 0.15 for the central part of the State; at the northern and western regions it is larger than 0.15 and at the "Mantiqueira" mountains it is less than 0.1.

  2. Kinetic Isotope Effect Determination Probes the Spin of the Transition State, Its Stereochemistry, and Its Ligand Sphere in Hydrogen Abstraction Reactions of Oxoiron(IV) Complexes.

    Science.gov (United States)

    Mandal, Debasish; Mallick, Dibyendu; Shaik, Sason

    2018-01-16

    This Account outlines interplay of theory and experiment in the quest to identify the reactive-spin-state in chemical reactions that possess a few spin-dependent routes. Metalloenzymes and synthetic models have forged in recent decades an area of increasing appeal, in which oxometal species bring about functionalization of hydrocarbons under mild conditions and via intriguing mechanisms that provide a glimpse of Nature's designs to harness these reactions. Prominent among these are oxoiron(IV) complexes, which are potent H-abstractors. One of the key properties of oxoirons is the presence of close-lying spin-states, which can mediate H-abstractions. As such, these complexes form a fascinating chapter of spin-state chemistry, in which chemical reactivity involves spin-state interchange, so-called two-state reactivity (TSR) and multistate reactivity (MSR). TSR and MSR pose mechanistic challenges. How can one determine the structure of the reactive transition state (TS) and its spin state for these mechanisms? Calculations can do it for us, but the challenge is to find experimental probes. There are, however, no clear kinetic signatures for the reactive-spin-state in such reactions. This is the paucity that our group has been trying to fill for sometime. Hence, it is timely to demonstrate how theory joins experiment in realizing this quest. This Account uses a set of the H-abstraction reactions of 24 synthetic oxoiron(IV) complexes and 11 hydrocarbons, together undergoing H-abstraction reactions with TSR/MSR options, which provide experimentally determined kinetic isotope effect (KIE exp ) data. For this set, we demonstrate that comparing KIE exp results with calculated tunneling-augmented KIE (KIE TC ) data leads to a clear identification of the reactive spin-state during H-abstraction reactions. In addition, generating KIE exp data for a reaction of interest, and comparing these to KIE TC values, provides the mechanistic chemist with a powerful capability to

  3. Estudo da cisticercose em pacientes portadores de epilepsia residentes em municípios do Cariri paraibano Cysticercosis research in epileptic patients dwelling in towns of the western Cariri in the State of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Francisca Inês de Sousa Freitas

    2005-09-01

    Full Text Available Este estudo contou com uma amostra de 110 pacientes epilépticos residentes no Cariri paraibano, tendo sido desenvolvido em três etapas sucessivas. Durante a primeira etapa, aplicou-se a ficha epidemiológica visando identificar fatores de risco associados ao complexo teníase-cisticercose na etiologia da epilepsia dos pacientes. A segunda etapa consistiu em exames imunológicos dos 110 pacientes com a utilização da técnica EITB para a identificação de anticorpos séricos anti-cisticercos, e da técnica ELISA para a presença de antígenos circulantes. Na terceira etapa, treze pacientes com sorologia considerada positiva foram submetidos a exames tomográficos. A partir da aplicação do questionário, foram detectados alguns fatores de risco. A soroprevalência constatada foi 118,2/1000 habitantes. Dos 13 pacientes com sorologia positiva para cisticercose, 46,1% têm lesões sugestivas de cisticercose de localização parenquimatosa. Conclui-se que os municípios estudados apresentam perfil epidemiológico compatível com a ocorrência do complexo teníase-cisticercose e que a cisticercose possivelmente desempenhe papel importante no surgimento da epilepsia nesses pacientes.This research involved a sample of 110 epileptic patients from western Cariri, Paraíba, Brazil and it has been developed in three successive phases. During the first one, an epidemiological form was applied with the aim of identifying risk factors related to the taeniasis cysticercosis complex in the etiology of the patients' epilepsy. The second phase consisted of immunological exams of 110 patients, by means of the EITB technique to identify the anti-cysticerci serum antibodies, whereas the presence of circulating antigens was verified through the ELISA technique. In the third phase, thirteen patients who were seropositive, were submitted to brain CT scan. Applying the questionnaire enabled us to know some risk factors. The seroprevalence detected was 118

  4. Investigation of the Effect of Small Hardening Spots Created on the Sample Surface by Laser Complex with Solid-State Laser

    Science.gov (United States)

    Nozdrina, O.; Zykov, I.; Melnikov, A.; Tsipilev, V.; Turanov, S.

    2018-03-01

    This paper describes the results of an investigation of the effect of small hardening spots (about 1 mm) created on the surface of a sample by laser complex with solid-state laser. The melted area of the steel sample is not exceed 5%. Steel microhardness change in the region subjected to laser treatment is studied. Also there is a graph of the deformation of samples dependence on the tension. As a result, the yield plateau and plastic properties changes were detected. The flow line was tracked in the series of speckle photographs. As a result we can see how mm surface inhomogeneity can influence on the deformation and strength properties of steel.

  5. Antibodies against major histocompatibility complex class II antigens directly inhibit the growth of T cells infected with Theileria parva without affecting their state of activation

    OpenAIRE

    Eichhorn, M; Prospero, T D; Heussler, Volker; Dobbelaere, D A

    1993-01-01

    We have analyzed the effect of antibodies (Abs) directed against major histocompatibility complex (MHC) class II Abs on the proliferation of Theileria parva-infected (Tpi) T cells. Anti-MHC class II Abs exert a direct effect on Tpi T cells causing an acute block in their proliferation. The inhibition does not involve apoptosis and is also entirely reversible. The rapid arrest of DNA synthesis caused by anti- MHC class II Abs is not due to interference with the state of activation of the T cel...

  6. Effects of clofibric acid on the activity and activity state of the hepatic branched-chain 2-oxo acid dehydrogenase complex.

    OpenAIRE

    Zhao, Y; Jaskiewicz, J; Harris, R A

    1992-01-01

    Feeding clofibric acid to rats caused little or no change in total activity of the liver branched-chain 2-oxo acid dehydrogenase complex (BCODC). No change in mass of liver BCODC was detected by immunoblot analysis in response to dietary clofibric acid. No changes in abundance of mRNAs for the BCODC E1 alpha, E1 beta and E2 subunits were detected by Northern-blot analysis. Likewise, dietary clofibric acid had no effect on the activity state of liver BCODC (percentage of enzyme in the dephosph...

  7. Imaging ultrafast excited state pathways in transition metal complexes by X-ray transient absorption and scattering using X-ray free electron laser source

    DEFF Research Database (Denmark)

    Chen, Lin X; Shelby, Megan L; Lestrange, Patrick J

    2016-01-01

    This report will describe our recent studies of transition metal complex structural dynamics on the fs and ps time scales using an X-ray free electron laser source, Linac Coherent Light Source (LCLS). Ultrafast XANES spectra at the Ni K-edge of nickel(ii) tetramesitylporphyrin (NiTMP) were measured...... on the low-energy shoulder of the edge, which is aided by the computation of X-ray transitions for postulated excited electronic states. The observed and computed inner shell to valence orbital transition energies demonstrate and quantify the influence of the electronic configuration on specific metal...

  8. The orbital ground state of the azide-substrate complex of human heme oxygenase is an indicator of distal H-bonding: Implications for the enzyme mechanism‡

    OpenAIRE

    Ogura, Hiroshi; Evans, John P.; Peng, Dungeng; Satterlee, James D.; de Montellano, Paul R. Ortiz; Mar, Gerd N. La

    2009-01-01

    The active site electronic structure of the azide complex of substrate-bound human heme oxygenase-1, (hHO) has been investigated by 1H NMR spectroscopy to shed light on the orbital/spin ground state as an indicator of the unique distal pocket environment of the enzyme. 2D 1H NMR assignments of the substrate and substrate-contact residue signals reveal a pattern of substrate methyl contact shifts, that places the lone iron π-spin in the dxz orbital, rather than the dyz orbital found in the cya...

  9. DYNAMICS OF DEVELOPMENT OF FINANCIAL SAFETY OF THE ENTERPRISE AS A COMPLEX ECONOMIC SECURITY OF THE STATE

    Directory of Open Access Journals (Sweden)

    Tetiana Ganushchak

    2017-09-01

    Full Text Available The purpose of the paper is to the performance of the evaluation of the financial safety of the enterprise. To achieve the stated aim it has been necessary to solve the following tasks: to use the approaches as to the evaluation of the financial safety of the enterprise, to introduce the analysis system of the financial safety of the enterprise, to consider the structural logical scheme of the analysis procedure of the financial safety of the enterprise, to give the description of the integral indicator of the financial safety of the enterprise; to evaluate and compare companies in the paltry industry according to the level of their financial safety. Methodology. Methodologial basis of the research are the scientific methods, such as : method of logical generalization, dialectical method of recognition of the economic phenomena – to give the definitions of «economic security of the enterprise», «financial security of the enterprise», grouping method, analysis which were used to estimate indicator position of the financial security of the poultry company, graph method which was applied to compare integral estimation of the enterprise;methods of synthesis, deduction, induction, method of the expert estimation to calculate and implement integral marker of the financial security of the poultry company;method of the correlation analysis which was used to identify weight coefficients of the all sided figures of the solvency , business activity, profitability, financial steadiness, pay ability. The priority in methods using was defined by the particular tasks and goals. Results of the research showned into a wide set of the ways of financial enterprise safety as a component of economic security of the state. There is an evaluation of enterprise financial safety on the basis of calculations of integral indicator, including combined indices of profitability (unprofitability, pay ability or the lack of that, business activity (fading, financial

  10. Risk factors associated with Toxoplasma gondii seroprevalence in goats in the State of Paraíba, Brazil Fatores de risco associados à soroprevalência de Toxoplasma gondii em caprinos do Estado da Paraíba, Brasil

    Directory of Open Access Journals (Sweden)

    Carolina de Sousa Américo Batista Santos

    2012-12-01

    ência da presença da infecção por T. gondii, em caprinos leiteiros, em uma região semiárida do Nordeste do Brasil, utilizando-se uma amostragem planejada. Há necessidade de condução de estudos posteriores para elucidar a importância epidemiológica dos fatores de risco identificados.

  11. Comportamento de expansão de argilas bentoníticas organofílicas do estado da Paraíba Expansion behavior of organophilic bentonite clays from the State of Paraíba

    Directory of Open Access Journals (Sweden)

    R. R. Menezes

    2008-06-01

    Full Text Available Argilas organofílicas apresentam uma vasta gama de aplicações industriais, desde a indústria do petróleo à farmacêutica e de cosméticos, passando pela retenção de resíduos e produção de nanocompósitos argila-polímeros. Este trabalho tem por objetivo analisar a influência do teor de sais quaternários de amônio na organofilização de argilas bentoníticas. As argilas utilizadas foram caracterizadas através da determinação de sua composição química, distribuição do tamanho de partículas e capacidade de troca de cátions. As argilas organofílicas foram preparadas utilizando dois sais quaternários de amônio: cloreto de alquil benzil amônio (Dodigen e brometo de cetil trimetil amônio (Cetremide. As argilas organofilizadas foram caracterizadas por difração de raios X e espectroscopia de infravermelho. Os resultados mostraram que o espaçamento basal aumenta com o aumento na quantidade de sal utilizado para a organofilização e que o comportamento desse aumento depende do sal e da argila utilizados, sendo, linear quando da utilização do sal Dodigen e dependente do tipo da argila quando da utilização do sal Cetremide.Organoclays are used in a wide range of industrial applications, from the petroleum to the pharmaceutical and cosmetic industry, reaching the waste adsorption applications and production of polymer-clay nanocomposites. This work has as aim study the influence of the amount of quaternary ammonium salts in the organophilization of bentonite clays. The used clays were characterized by chemical composition, particle size distribution and cation exchange capacity determination. The organoclays were prepared using two quaternary ammonium salts: alkyl dimethyl benzyl ammonium chloride (Dodigen and cetyl trimethyl ammonium bromide (Cetremide. The organoclays were characterized by X-ray diffraction and IR spectroscopy. The results showed that the interlayer spacing increase with the rise in the amount of salt

  12. Vol. 33 - Compact State-Space Models for Complex Superconducting Radio-Frequency Structures Based on Model Order Reduction and Concatenation Methods

    CERN Document Server

    Flisgen, Thomas

    2015-01-01

    The modeling of large chains of superconducting cavities with couplers is a challeng- ing task in computational electrical engineering. The direct numerical treatment of these structures can easily lead to problems with more than ten million degrees of freedom. Problems of this complexity are typically solved with the help of parallel programs running on supercomputing infrastructures. However, these infrastructures are expensive to purchase, to operate, and to maintain. The aim of this thesis is to introduce and to validate an approach which allows for modeling large structures on a standard workstation. The novel technique is called State-Space Concatena- tions and is based on the decomposition of the complete structure into individual segments. The radio-frequency properties of the generated segments are described by a set of state-space equations which either emerge from analytical considera- tions or from numerical discretization schemes. The model order of these equations is reduced...

  13. Photo-Induced Spin-State Conversion in Solvated Transition Metal Complexes Probed via Time-Resolved Soft X-ray Spectroscopy

    Energy Technology Data Exchange (ETDEWEB)

    Huse, Nils; Kim, Tae Kyu; Jamula, Lindsey; McCusker, James K.; de Groot, Frank M. F.; Schoenlein, Robert W.

    2010-04-30

    Solution-phase photoinduced low-spin to high-spin conversion in the FeII polypyridyl complex [Fe(tren(py)3)]2+ (where tren(py)3 is tris(2-pyridylmethyliminoethyl)amine) has been studied via picosecond soft X-ray spectroscopy. Following 1A1 --> 1MLCT (metal-to-ligand charge transfer) excitation at 560 nm, changes in the iron L2- and L3-edges were observed concomitant with formation of the transient high-spin 5T2 state. Charge-transfer multiplet calculations coupled with data acquired on low-spin and high-spin model complexes revealed a reduction in ligand field splitting of 1 eV in the high-spin state relative to the singlet ground state. A significant reduction in orbital overlap between the central Fe-3d and the ligand N-2p orbitals was directly observed, consistent with the expected ca. 0.2 Angstrom increase in Fe-N bond length upon formation of the high-spin state. The overall occupancy of the Fe-3d orbitals remains constant upon spin crossover, suggesting that the reduction in sigma-donation is compensated by significant attenuation of pi-back-bonding in the metal-ligand interactions. These results demonstrate the feasibility and unique potential of time-resolved soft X-ray absorption spectroscopy to study ultrafast reactions in the liquid phase by directly probing the valence orbitals of first-row metals as well as lighter elements during the course of photochemical transformations.

  14. Complex network inference from P300 signals: Decoding brain state under visual stimulus for able-bodied and disabled subjects

    Science.gov (United States)

    Gao, Zhong-Ke; Cai, Qing; Dong, Na; Zhang, Shan-Shan; Bo, Yun; Zhang, Jie

    2016-10-01

    Distinguishing brain cognitive behavior underlying disabled and able-bodied subjects constitutes a challenging problem of significant importance. Complex network has established itself as a powerful tool for exploring functional brain networks, which sheds light on the inner workings of the human brain. Most existing works in constructing brain network focus on phase-synchronization measures between regional neural activities. In contrast, we propose a novel approach for inferring functional networks from P300 event-related potentials by integrating time and frequency domain information extracted from each channel signal, which we show to be efficient in subsequent pattern recognition. In particular, we construct brain network by regarding each channel signal as a node and determining the edges in terms of correlation of the extracted feature vectors. A six-choice P300 paradigm with six different images is used in testing our new approach, involving one able-bodied subject and three disabled subjects suffering from multiple sclerosis, cerebral palsy, traumatic brain and spinal-cord injury, respectively. We then exploit global efficiency, local efficiency and small-world indices from the derived brain networks to assess the network topological structure associated with different target images. The findings suggest that our method allows identifying brain cognitive behaviors related to visual stimulus between able-bodied and disabled subjects.

  15. Do All X-ray Structures of Protein-Ligand Complexes Represent Functional States? EPOR, a Case Study.

    Science.gov (United States)

    Corbett, Michael S P; Mark, Alan E; Poger, David

    2017-02-28

    Based on differences between the x-ray crystal structures of ligand-bound and unbound forms, the activation of the erythropoietin receptor (EPOR) was initially proposed to involve a cross-action scissorlike motion. However, the validity of the motions involved in the scissorlike model has been recently challenged. Here, atomistic molecular dynamics simulations are used to examine the structure of the extracellular domain of the EPOR dimer in the presence and absence of erythropoietin and a series of agonistic or antagonistic mimetic peptides free in solution. The simulations suggest that in the absence of crystal packing effects, the EPOR chains in the different dimers adopt very similar conformations with no clear distinction between the agonist and antagonist-bound complexes. This questions whether the available x-ray crystal structures of EPOR truly represent active or inactive conformations. The study demonstrates the difficulty in using such structures to infer a mechanism of action, especially in the case of membrane receptors where just part of the structure has been considered in addition to potential confounding effects that arise from the comparison of structures in a crystal as opposed to a membrane environment. The work highlights the danger of assigning functional significance to small differences between structures of proteins bound to different ligands in a crystal environment without consideration of the effects of the crystal lattice and thermal motion. Copyright © 2017 Biophysical Society. Published by Elsevier Inc. All rights reserved.

  16. Density of vibrational States of the light-harvesting complex II of green plants studied by inelastic neutron scattering

    CERN Document Server

    Pieper, J K; Renger, G; Lechner, R E

    2004-01-01

    Results of inelastic neutron scattering (INS) experiments are reported for the solubilized trimeric light-harvesting complex of photosystem II (LHC II) in the temperature range from 5 to 100 K. Two incident neutron wavelengths of 2.0 ( similar to 20 meV) and 5.1 A ( similar to 3.2 meV) corresponding to elastic energy resolutions of DeltaE = 0.920 meV and DeltaE = 0.093 meV, respectively, are employed to study INS spectra of LHC II for both neutron energy loss and gain. Solubilized LHC II and D//2O-containing buffer solution are investigated separately in order to properly subtract the contribution of the solvent. The inelastic part of the scattering function S(Q, omega) derived for the LHC II protein resembles the well-known "Boson-peak" and is characterized by a maximum at about 2.5 meV and a strongly asymmetric line shape with a slight tailing toward higher energy transfers. Analysis of the momentum transfer dependence of S(Q, omega) reveals that both the elastic and inelastic contributions to S(Q, omega) e...

  17. Occurrence of Pantophthalmus kerteszianus and P. chuni (Diptera: Pantophthalmidae on parica in Para State, Brazil Ocorrência de Pantophthalmus kerteszianus e P. chuni (Diptera: Pantophthalmidae em paricá, no Estado do Pará

    Directory of Open Access Journals (Sweden)

    Alexandre Mehl Lunz

    2010-06-01

    Full Text Available

    This is the first register of Pantophthalmus kerteszianus Enderlein e P. chuni Enderlein (Diptera: Pantophthalmidae attacking parica trees [Schizolobium parahyba (Vell. S. F. Blake var. amazonicum (Huber ex Ducke Barneby] in Paragominas, Para State, Brazil. Whereas Para State has the largest area with parica plantation in Brazil, there is a risk of these insects become important pests of this crop.


    doi: 10.4336/2010.pfb.30.61.71

    As ocorrências de Pantophthalmus kerteszianus Enderlein e P. chuni Enderlein são registradas pela primeira vez em reflorestamentos com paricá [Schizolobium parahyba (Vell. S. F. Blake var. amazonicum (Huber ex Ducke Barneby] no Estado do Pará, Município de Paragominas. Considerando que o Pará possui a maior área plantada de paricá no Brasil, existe o risco de esses insetos tornarem-se pragas importantes dessa cultura.

     

    doi: 10.4336/2010.pfb.30.61.71

  18. New mosses records (Bryophyta for Goiás and Tocantins states, Brazil Ocorrências novas de musgos (Bryophyta para os Estados de Goiás e Tocantins, Brasil

    Directory of Open Access Journals (Sweden)

    Denilson Fernandes Peralta

    2008-09-01

    Full Text Available Sixty-five moss taxa are new records for Goiás and Tocantins States. Of these, 44 are new records (40 - Goiás; four - Tocantins and 23 are new sites in each of the states (19 -Goiás; four - Tocantins. Ptychostomum pallescens (Schleich. ex Schwägr. Spence and Philonotis fontana (Hedw. Brid. are new records for Brazil, and are illustrated.Após o estudo da coleção do herbário SP, foram encontradas 65 novas ocorrências de musgos para Goiás e Tocantins. Deste total, 44 táxons são primeiras referências (40 - Goiás e quatro - Tocantins e 23 táxons tiveram a distribuição geográfica ampliada em cada um dos estados (19 - Goiás e quatro - Tocantins. As espécies Ptychostomum pallescens (Schleich. ex Schwägr. Spence e Philonotis fontana (Hedw. Brid. são novas citações para o Brasil e apresentam ilustração.

  19. Ocorrência de Mollicutes e Ureaplasma spp. em surto de doença reprodutiva em rebanho bovino no Estado da Paraíba Occurrence of Mollicutes and Ureaplasma spp. in outbreak of reproductive disease in cattle herds, State of Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Sandra B. dos Santos

    2013-03-01

    Full Text Available Em março de 2012 foi diagnosticado um surto de doença reprodutiva em rebanho bovino no Estado da Paraíba, Brasil. Foram examinadas 32 vacas e dois touros da raça Girolando. As vacas apresentaram sinais de doença reprodutiva como repetição de cio, vulvovaginite granular, infertilidade e abortos. As amostras de suabes vaginais e prepuciais foram colhidas e submetidas a isolamento bacteriano e PCR. As reações da PCR para Mollicutes e Ureaplasma spp. foram realizadas com os iniciadores MGSO-GPO3 e UGP'F-UGP'R, respectivamente. Na Nested PCR para Ureaplasma diversum, os iniciadores usados foram UD1, UD2, UD3 e UD4. Para isolamento bacteriano, as amostras foram diluídas de 10-1 até 10-5, semeadas em meio "UB", líquido e placa, sendo incubadas por até 21 dias a 37ºC em jarra de microaerofilia. A frequência de Mollicutes detectada na PCR foi de 65,6% e para Ureaplasma spp. foi de 50,0%, enquanto que para U. diversum foi de 15,6%. No isolamento a frequência de Mollicutes foi de 57,1% e para Ureaplasma spp. foi de 28,6%. No ágar "UB" foi visualizado o crescimento misto de Mycoplasma spp. e Ureaplasma spp. em seis amostras. Foi confirmado o envolvimento de micro-organismos da Classe Mollicutes em surto de doença reprodutiva em vacas no sertão paraibano.In March of 2012 was investigated a reproductive disease outbreak in cattle herds from Paraíba State, Brazil. Were examined 32 cows and two bulls Giroland breed. The cows showed signs and symptoms of reproductive failure such as repeat breeding, granular vulvovaginitis, infertility and abortions. Vaginal and preputial mucous samples were collected for analysis by PCR and isolation. The PCR reactions for Mollicutes and Ureaplasma spp. were realized with primers MGSO and GPO3, and UGP'F and UGP'R respectively. The nested PCR assay for Ureaplasma diversum was realized with primers UD1, UD2, UD3 and UD4. For bacteriologic isolation, obtained samples were diluted up to 10-1 at 10-5, inoculated

  20. Primer registro del ratón de los volcanes (Neotomodon alstoni para el estado de Hidalgo, México First record of the volcano mouse (Neotomodon alstoni from the State of Hidalgo, Mexico

    Directory of Open Access Journals (Sweden)

    Alejandro García-Becerra

    2012-06-01

    Full Text Available El ratón de los volcanes (Neotomodon alstoni se registra por primera vez en el estado de Hidalgo, México. Los ejemplares se recolectaron en diciembre de 2010, en el municipio de Almoloya, aproximadamente a 32.8 km al norte de la localidad documentada más cercana al estado de Tlaxcala, por lo que este nuevo registro se convierte en el más norteño para la distribución conocida del ratón de los volcanes.The volcano mouse (Neotomodon alstoni is firstly recorded in the State of Hidalgo. Specimens were collected in December 2010, at the municipality of Almoloya, approximately 32.8 km to the north from the nearest locality in the state of Tlaxcala. Therefore, this is the northernmost record for the range of the Mexican volcano mouse.

  1. Preparation of the polyelectrolyte complex hydrogel of biopolymers via a semi-dissolution acidification sol-gel transition method and its application in solid-state supercapacitors

    Science.gov (United States)

    Zhao, Jian; Chen, Yu; Yao, Ying; Tong, Zong-Rui; Li, Pu-Wang; Yang, Zi-Ming; Jin, Shao-Hua

    2018-02-01

    Hydrogels have drawn many attentions as the solid-state electrolytes in flexible solid-state supercapacitors (SCs) recently. Among them, the polyelectrolyte complex hydrogel (PECH) electrolytes of natural polymers are more competitive because of their environmentally friendly property and low cost. However, while mixing two biopolymer solutions with opposite charges, the strong electrostatic interactions between the cationic and anionic biopolymers may result in precipitates instead of hydrogels. Here we report a novel method, semi-dissolution acidification sol-gel transition (SD-A-SGT), for the preparation of the PECH of chitosan (CTS) and sodium alginate (SA), with the controllable sol-gel transition and uniform composition and successfully apply it as the hydrogel electrolyte of solid-state supercapacitors (SCs). The CTS-SA PECH exhibits an extremely high ionic conductivity of 0.051 S·cm-1 and reasonable mechanical properties with a tensile strength of 0.29 MPa and elongation at break of 109.5%. The solid-state SC fabricated with the CTS-SA PECH and conventional polyaniline (PANI) nanowire electrodes provided a high specific capacitance of 234.6 F·g-1 at 5 mV·s-1 and exhibited excellent cycling stability with 95.3% capacitance retention after 1000 cycles. Our work may pave a novel avenue to the preparation of biodegradable PECHs of full natural polymers, and promote the development of environmentally friendly electronic devices.

  2. Seleção de clones de Hevea brasiliensis para a região de Mococa, estado de São Paulo. Clone selection of Hevea brasiliensis to Mococa region, state of São Paulo.

    Directory of Open Access Journals (Swed