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Sample records for cummings farrington

  1. The marriage of biology and technology. Professor Mogens Rysholt Poulsen interviewed by Dr Keith Farrington.

    Science.gov (United States)

    Poulsen, Mogens Rysholt

    2009-03-07

    Lab on a Chip is once again instigating a series of occasional interviews with those people running Departments/Institutions that we believe will be interesting to readers and provide a useful insight to other members of the community. In this first interview Dr Keith Farrington talks to Professor Mogens Rysholt Poulsen from DTU Nanotech because studies in this institute have recently expanded to include more biologically relevant areas of research in order to provide new biological insights.

  2. Jaynes Cummings Photonic Superlattices

    CERN Document Server

    Longhi, Stefano

    2011-01-01

    A classical realization of the Jaynes-Cummings (JC) model, describing the interaction of a two-level atom with a quantized cavity mode, is proposed based on light transport in engineered waveguide superlattices. The optical setting enables to visualize in Fock space dynamical regimes not yet accessible in quantum systems, providing new physical insights into the deep strong coupling regime of the JC model. In particular, bouncing of photon number wave packets in Hilbert space and revivals of populations are explained as generalized Bloch oscillations in an inhomogeneous tight-binding lattice.

  3. Fifty years of Jaynes-Cummings physics

    Science.gov (United States)

    Greentree, Andrew D.; Koch, Jens; Larson, Jonas

    2013-11-01

    This special issue commemorates the 50th anniversary of the seminal paper published by E T Jaynes and F W Cummings [1], the fundamental model which they introduced and now carries their names, and celebrates the remarkable host of exciting research on Jaynes-Cummings physics throughout the last five decades. The Jaynes-Cummings model has been taking the prominent stance as the 'hydrogen atom of quantum optics' [2]. Generally speaking, it provides a fundamental quantum description of the simplest form of coherent radiation-matter interaction. The Jaynes-Cummings model describes the interaction between a single electromagnetic mode confined to a cavity, and a two-level atom. Energy is exchanged between the field and the atom, which leads directly to coherent population oscillations (Rabi oscillations) and superposition states (dressed states). Being exactly solvable, the Jaynes-Cummings model serves as a most useful toy model, and as such it is a textbook example of the physicists' popular strategy of simplifying a complex problem to its most elementary constituents. Thanks to the simplicity of the Jaynes-Cummings model, this caricature of coherent light-matter interactions has never lost its appeal. The Jaynes-Cummings model is essential when discussing experiments in quantum electrodynamics (indeed the experimental motivation of the Jaynes-Cummings model was evident already in the original paper, dealing as it does with the development of the maser), and it has formed the starting point for much fruitful research ranging from ultra-cold atoms to cavity quantum electrodynamics. In fact, Jaynes-Cummings physics is at the very heart of the beautiful experiments by S Haroche and D Wineland, which recently earned them the 2012 Nobel Prize in physics. Indeed, as with most significant models in physics, the model is invoked in settings that go far beyond its initial framework. For example, recent investigations involving multi-level atoms, multiple atoms [3, 4], multiple

  4. Darboux transformations of the Jaynes-Cummings Hamiltonian

    CERN Document Server

    Samsonov, B F; Samsonov, Boris F; Negro, Javier

    2004-01-01

    A detailed analysis of matrix Darboux transformations under the condition that the derivative of the superpotential be self-adjoint is given. As a onsequence, a class of the symmetries associated to Schr\\"odinger matrix Hamiltonians is characterized. The applications are oriented towards the Jaynes-Cummings eigenvalue problem, so that exactly solvable $2\\times 2$ matrix Hamiltonians of the Jaynes-Cummings type are obtained. It is also established that the Jaynes-Cummings Hamiltonian is a quadratic function of a Dirac-type Hamiltonian.

  5. Cummings/Ju - Harvard; Emory | Division of Cancer Prevention

    Science.gov (United States)

    Principal Investigator: Richard D Cummings, PhDInstitution: Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA Principal Investigator: Tongzhong Ju, MD, PhDInstitution: Emory University, Atlanta, GA |

  6. Excitation functions of $^{nat}$Pb(d,x)$^{206,205,204,203,202}$Bi, $^{203cum,202m,201cum}$Pb and $^{202cum,201cum}$Tl reactions up to 50 MeV

    CERN Document Server

    Ditrói, F; Takács, S; Hermanne, A; Ignatyuk, A V

    2014-01-01

    Cross-sections of deuteron induced nuclear reactions on lead were measured up to 50 MeV using the standard stacked foil irradiation technique and high resolution $\\gamma$-ray spectrometry. Experimental cross-sections and derived integral yields are presented for the $^{nat}$Pb(d,x)$^{206,205,204,203,202}$Bi, $^{203cum,202m,201cum}$Pb and $^{202cum,201cum}$Tl reactions. The experimental data were compared with the results from literature and with the data in the TENDL-2013 library (obtained with TALYS code). The cross-section data were analyzed also with the theoretical results calculated by using the ALICE-IPPPE-D and EMPIRE-D codes.

  7. Dynamical Algebraic Approach to the Modified Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    许晶波; 邹旭波

    2001-01-01

    The modified Jaynes-Cummings model of a single two-level atom placed in the common domain of two cavities or interacting with two quantized modes is studied by a dynamical algebraic method. With the help of an SU(2) algebraic structure, we then obtain the eigenvalues, eigenstates, time evolution operator and atomic inversion operator for the system. We proceed to investigate the modified Jaynes-Cummings model governed by the Milburn equation and present the exact solution of the Milburn equation.

  8. Fractional Quantum Hall Physics in Jaynes-Cummings-Hubbard Lattices

    OpenAIRE

    Hayward, Andrew L. C.; Martin, Andrew M.; Greentree, Andrew D.

    2012-01-01

    Jaynes-Cummings-Hubbard arrays provide unique opportunities for quantum emulation as they exhibit convenient state preparation and measurement, and in-situ tuning of parameters. We show how to realise strongly correlated states of light in Jaynes-Cummings-Hubbard arrays under the introduction of an effective magnetic field. The effective field is realised by dynamic tuning of the cavity resonances. We demonstrate the existence of Fractional Quantum Hall states by com- puting topological invar...

  9. [Pediamécum: one year of experience].

    Science.gov (United States)

    Piñeiro Pérez, R; Martínez Fernández-Llamazares, C; Calvo Rey, C; Piñeiro Pérez, A P; Criado Vega, E A; Bravo Acuña, J; Cabrera García, L; Mellado Peña, M J

    2014-10-01

    In 2011, the Spanish Association of Pediatrics decided to support the most ambitious project of its newly created Committee for Medicinal Products: Pediamécum. This is the first free on-line database with information on medicinal products for pediatric use in Spain. The web page http://pediamecum.es/ started on December 17 December 2012. One year later, Pediamécum includes 580 registered drugs. The website achieved more than one million page views by the end of 2013. Because of the first anniversary of Pediamécum, a survey was performed to request the feeling of users. Four hundred eighty-three responses were obtained. Ninety-five percent believed that it is easy to navigate through the web, and 74% said that their doubts about the use of medicines in children were always resolved. The overall rating of Pediamécum is 7.5/10. The aims of Pediamécum are being accomplished; which is reflected essentially due to it becoming a useful tool for all professionals who care for children in their daily clinical practice. Copyright © 2014 Asociación Española de Pediatría. Published by Elsevier Espana. All rights reserved.

  10. Effects of Spin-Orbit Coupling on Jaynes-Cummings and Tavis-Cummings Models

    CERN Document Server

    Zhu, Chuanzhou; Pu, Han

    2016-01-01

    We consider ultracold atoms inside a ring optical cavity that supports a single plane-wave mode. The cavity field, together with an external coherent laser field, drives a two-photon Raman transition between two internal pseudo-spin states of the atom. This gives rise to an effective coupling between atom's pseudo-spin and external center-of-mass (COM) motion. For the case of a single atom inside the cavity, We show how the spin-orbit coupling modifies the static and dynamic properties of the Jaynes-Cummings (JC) model. In the case of many atoms in thermodynamic limit, we show that the spin-orbit coupling modifies the Dicke superradiance phase transition boundary and the non-superradiant normal phase may become reentrant in some regimes.

  11. Enhancement of Squeezing in Two-Photon Jaynes-Cummings Model with Atomic Measurement

    Institute of Scientific and Technical Information of China (English)

    YE Sai-Yun

    2006-01-01

    We investigate the squeezing properties of the cavity field in the degenerate two-photon Jaynes-Cummings model. Compared with the one-photon Jaynes-Cummings model, the squeezing is more pronounced in the case of two-photon Jaynes-Cummings model under certain conditions.

  12. e.e. cummings as an Expressionist poet

    Directory of Open Access Journals (Sweden)

    S. Coetzee-Van Rooy

    1994-05-01

    Full Text Available This study investigates the poetry of e.e. cummings from what is considered a novel hut productive point of view: it holds that in order to categorize cummings as an Expressionist poet (an enterprise which, it is maintained, will provide the reader with a useful frame for grappling with certain troubling aspects of cummings poetry it is necessary to develop a reading strategy based on a method derived from the social sciences and the study of linguistics to make the categorization both feasible and responsible. Using techniques of choice suggested by critics, and developing further techniques of randomizing developed in accordance with the social sciences and linguistics, it was possible to arrive at a representative corpus of poetry, which could then be tested against criteria of Expressionism developed from a comprehensive literature study involving both poetry and the fine arts. This modus operandi has enabled the authors to assert that cummings could most fruitfully be read as an Expressionist poet. It is also suggested that this method could be most fruitfully extrapolated to similar studies involving other 'schools' and styles and other poets.

  13. The two-atom Jaynes-Cummings model's dynamic properties

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    The model of two two-level atoms interact with a single-mode cavity was investigated. The formulation of the time evolution operator for the two-atom Jaynes-Cummings model is pressented by the bare-states approach. Besides, the time evolution of the two-atom common population probabilities is studied, and some novel features are obtained.

  14. Some features of the Driven Jaynes-Cummings system

    OpenAIRE

    Tuguldur, B.; Gantsog, Ts.

    2012-01-01

    We investigate a generalized Jaynes-Cummings model with the external field driving the cavity mode. The numerical results for the dynamics of the atom and the cavity field mode are given. Approximated solutions to the Schrodinger equation are supplied, which allow us to predict the kinematics of the Q function in the complex plane.

  15. Advanced adsorption cooling cum desalination cycle: A thermodynamic framework

    KAUST Repository

    Chakraborty, Anutosh

    2011-01-01

    We have developed a thermodynamic framework to calculate adsorption cooling cum desalination cycle performances as a function of pore widths and pore volumes of highly porous adsorbents, which are formulated from the rigor of thermodynamic property surfaces of adsorbent-adsorbate system and the adsorption interaction potential between them. Employing the proposed formulations, the coefficient of performance (COP) and overall performance ratio (OPR) of adsorption cycle are computed for various pore widths of solid adsorbents. These results are compared with experimental data for verifying the proposed thermodynamic formulations. It is found from the present analysis that the COP and OPR of adsorption cooling cum desalination cycle is influenced by (i) the physical characteristics of adsorbents, (ii) characteristics energy and (iii) the surface-structural heterogeneity factor of adsorbent-water system. The present study confirms that there exists a special type of adsorbents having optimal physical characteristics that allows us to obtain the best performance.

  16. Unitary transformation method for solving generalized Jaynes-Cummings models

    Indian Academy of Sciences (India)

    Sudha Singh

    2006-03-01

    Two fully quantized generalized Jaynes-Cummings models for the interaction of a two-level atom with radiation field are treated, one involving intensity dependent coupling and the other involving multiphoton interaction between the field and the atom. The unitary transformation method presented here not only solves the time dependent problem but also allows a determination of the eigensolutions of the interacting Hamiltonian at the same time.

  17. Jaynes-Cummings model with a collective atomic mode

    OpenAIRE

    Zheng, Shi-Biao

    2012-01-01

    We study the dynamics of a single control atom and an atomic sample interacting with a nonresonant cavity mode. The control atom is driven by an auxiliary classical field. Under certain conditions, the coherent energy exchange between the control atom and the atomic sample induced by the cavity mode is described by the Jaynes-Cummings model. The idea provides a possibility for quantum-state engineering and reconstruction for collective atomic modes.

  18. SYSTHESIC OF TROLLEY CUM WHEELCHAIR FOR PATIENT HANDLING

    Directory of Open Access Journals (Sweden)

    Ehsanullah Khan

    2011-08-01

    Full Text Available Handling of patient from hospital bed to CT-Scan, MR Scan, X-Ray, Sonography centre etc is a cumbersome and tedious job. Generally from bed, the patient is moved to trolley manually. Three to four persons lift the patient and keep him on the stretcher. The trolley is moved to lift if necessary. If the lift cannot accommodate, the trolley, the patient is transferred to the ground floor by a nursing staff on a stretcher, and the stretcher is kept on the trolley. Again the trolley takes the patient to ambulance but patient is to be liftedmanually with stretcher and put on ambulance platform. Again at the CT scan centre the patient with stretcher has to be lifted manually for X-Ray or CT scan. The procedure is repeated for moving the patient back to the hospital bed. The manual handling of patient is injurious to the patient as stresses are produced in the body of thepatient, especially in neck, back bone, limb joints etc along with the basic medical problem he has. Improper handling may cause injuries to the patient. Also the nursing staffs who handles patients, faces some health problems like pain in the shoulder, back bone etc. For safety of the patient, the manual handling of patient should be totally eliminated. If trolley cum wheelchair ,with adjustable height is available, once the patient is transferred to the trolley-cum-wheelchair from hospital bed, the patient will not be required to be handled manually till he reaches the CT Scan / X-Raycentre. The paper presents a schematic design of trolley cum wheelchair and discusses its salient features and applications.

  19. Qudit quantum computation in the Jaynes-Cummings model

    DEFF Research Database (Denmark)

    Mischuck, Brian; Mølmer, Klaus

    2013-01-01

    We have developed methods for performing qudit quantum computation in the Jaynes-Cummings model with the qudits residing in a finite subspace of individual harmonic oscillator modes, resonantly coupled to a spin-1/2 system. The first method determines analytical control sequences for the one......- and two-qudit gates necessary for universal quantum computation by breaking down the desired unitary transformations into a series of state preparations implemented with the Law-Eberly scheme [ Law and Eberly Phys. Rev. Lett. 76 1055 (1996)]. The second method replaces some of the analytical pulse...

  20. Qudit quantum computation in the Jaynes-Cummings model

    DEFF Research Database (Denmark)

    Mischuck, Brian; Mølmer, Klaus

    2013-01-01

    We have developed methods for performing qudit quantum computation in the Jaynes-Cummings model with the qudits residing in a finite subspace of individual harmonic oscillator modes, resonantly coupled to a spin-1/2 system. The first method determines analytical control sequences for the one......- and two-qudit gates necessary for universal quantum computation by breaking down the desired unitary transformations into a series of state preparations implemented with the Law-Eberly scheme [ Law and Eberly Phys. Rev. Lett. 76 1055 (1996)]. The second method replaces some of the analytical pulse...

  1. Thermal evaluation of solarium-cum-passive solar house

    Energy Technology Data Exchange (ETDEWEB)

    Tiwari, G.N.; Kumar, S. (Indian Inst. of Tech., New Delhi (India). Centre of Energy Studies)

    1991-01-01

    The thermal analysis of a solarium-cum-passive solar house, based on energy balances of its different components, has been presented. The effects of link walls, viz. air collector, water wall and transwall, and isothermal mass have been incorporated in the analysis in addition to system as well as climatical parameters. Analytical expressions for room temperatures of the solarium and living space have been derived. Numerical calculations have been carried out for a typical day of Srinagar to evaluate the thermal performance of the systems, along with optimization of the solarium for best thermal load levelling for the living room. Some of the results are as follows: (i) the transwall, as a link wall, gives better results and (ii) the solarium room temperature is higher during the day and becomes lower during the night in comparison with the living room temperature. (author).

  2. Solutions of two-mode Jaynes-Cummings models

    Indian Academy of Sciences (India)

    Sudha Singh; Ashalata Sinha

    2008-05-01

    A simple procedure to solve two fully quantized non-linear Jaynes-Cummings models is presented, one in which an atom interacts with a two-mode radiation field in a Raman-type process and the other involving multiphoton interaction between the two-mode field and the atom. Effect of intensity-dependent coupling between the field and the atom in both the above-mentioned cases has also been investigated. The unitary transformation method presented here not only solves the time-dependent problem but also permits a determination of the eigensolutions of the interacting Hamiltonian at the same time. Graphical features of the time dependence of the population inversion have been analysed when one of the field modes is prepared initially in a coherent state while the other one in a vacuum state.

  3. Gravitational Jaynes–Cummings model beyond the rotating wave approximation

    Indian Academy of Sciences (India)

    M Mohammadi

    2012-05-01

    In this paper, the quantum properties of a two-level atom and the cavity-field in the Jaynes–Cummings model with the gravity beyond the rotating wave approximation are investigated. For this purpose, by solving the Schrödinger equation in the interaction picture, the evolving state of the system is found by which the influence of the counter-rotating terms on the dynamical behaviour of atomic population inversion and the probability distribution of the cavity-field as quantum properties is explored. The results in the atom–field system beyond the rotating wave approximation with the gravity show that the quantum properties are not completely suppressed under certain conditions.

  4. Entanglement in a generalized Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Zhang Guo-Feng; Liu Jia

    2007-01-01

    We investigate the pairwise entanglement and global entanglement in a generalized Jaynes-Cummings model,which can be used to realize Greenberger-Horne-Zeilinger (GHZ) entangled state (Zheng S B 2001 Phys. Rev. Lett. 87230404). Our results show that the W-type entangled states cannot be generated based on the model. The dependences of entanglement on Rabi frequency λ and dipole-dipole coupling strength Ω are given. It is found that there exists the quantum phase transition when λ = Ω. For typical experimental data, the critical temperature for pairwise entanglement is on the order of 10-6 K. Based on these results, two strategies that overcome decoherence are proposed.

  5. Probing multipartite entanglement in a coupled Jaynes-Cummings system

    CERN Document Server

    Xue, Peng; Sanders, Barry C

    2012-01-01

    We show how to probe multipartite entanglement in $N$ coupled Jaynes-Cummings cells where the degrees of freedom are the electronic energies of each of the $N$ atoms in separate single-mode cavities plus the $N$ single-mode fields themselves. Specifically we propose probing the combined system as though it is a dielectric medium. The spectral properties and transition rates directly reveal multipartite entanglement signatures. It is found that the Hilbert space of the $N$ cell system can be confined to the totally symmetric subspace of two states only that are maximally-entangled W states with 2N degrees of freedom. The subspace of the remaining $2N-2$ states is comprises optically inactive quadripartite states.

  6. Quantum phase diagrams of the Jaynes–Cummings Hubbard models in non-rectangular lattices

    Science.gov (United States)

    Zhang, Jun; Jiang, Ying

    2017-03-01

    In this paper, we investigate systematically the quantum phase transition between the Mott-insulator and superfluid states of the Jaynes–Cummings Hubbard model in triangular, square, honeycomb and kagomé lattices. With the help of Green’s function method, by treating the hopping term in the Jaynes–Cummings Hubbard model as perturbation, we calculate the phase boundaries of Jaynes–Cummings Hubbard models on different geometrical lattices analytically up to second order for both detuning Δ =0 and Δ \

  7. Grassmann Variables and the Jaynes-Cummings Model

    CERN Document Server

    Dalton, Bryan J; Jeffers, John; Barnett, Stephen M

    2012-01-01

    This paper shows that phase space methods using a positive P type distribution function involving both c-number variables (for the cavity mode) and Grassmann variables (for the two level atom) can be used to treat the Jaynes-Cummings model. Although it is a Grassmann function, the distribution function is equivalent to six c-number functions of the two bosonic variables. Experimental quantities are given as bosonic phase space integrals involving the six functions. A Fokker-Planck equation involving both left and right Grassmann differentiation can be obtained for the distribution function, and is equivalent to six coupled equations for the six c-number functions. The approach used involves choosing the canonical form of the (non-unique) positive P distribution function, where the correspondence rules for bosonic operators are non-standard and hence the Fokker-Planck equation is also unusual. Initial conditions, such as for initially uncorrelated states, are used to determine the initial distribution function...

  8. Quantum Diagonalization Method in the TAVIS-CUMMINGS Model

    Science.gov (United States)

    Fujii, Kazuyuki; Higashida, Kyoko; Kato, Ryosuke; Suzuki, Tatsuo; Wada, Yukako

    2005-06-01

    To obtain the explicit form of evolution operator in the Tavis-Cummings model we must calculate the term ${e}^{-itg(S_{+}\\otimes a+S_{-}\\otimes a^{\\dagger})}$ explicitly which is very hard. In this paper we try to make the quantum matrix $A\\equiv S_{+}\\otimes a+S_{-}\\otimes a^{\\dagger}$ diagonal to calculate ${e}^{-itgA}$ and, moreover, to know a deep structure of the model. For the case of one, two and three atoms we give such a diagonalization which is first nontrivial examples as far as we know, and reproduce the calculations of ${e}^{-itgA}$ given in quant-ph/0404034. We also give a hint to an application to a noncommutative differential geometry. However, a quantum diagonalization is not unique and is affected by some ambiguity arising from the noncommutativity of operators in quantum physics. Our method may open a new point of view in Mathematical Physics or Quantum Physics.

  9. E. E. Cummings: From Parenthesis to Personality (Part I

    Directory of Open Access Journals (Sweden)

    Uroš Mozetič

    2006-06-01

    Full Text Available The paper presents the unique oeuvre of E.E. Cummings, who claims an outstanding position in the heritage of American poetry, as a case of Bildungsdichtung. This status is largely due to his highly innovative and iconoclastic approach to poetic composition, starting from his early rebellious endeavours drawing on an astounding variety of non-standard and downright shocking potentialities of the English language (including such peculiar linguistic and stylistic idiosyncracies as drastic changes of the syntactic English word order, shifts at the morphology and word-formation level, unorthodox use of punctuation, extravagant typography and spacing or arrangement of space between the lines, a diversity of meters and rhymes, as well as seemingly eccentric imagery, to his later and invariably maturer poetic diction – the diction of one who has apparently come to terms with the world and his fellow-beings, realising that genuine wisdom resides in the understanding and forgiveness of the inherently fallible human nature rather than in its continuous sardonic scrutiny.

  10. Quantum Diagonalization Method in the Tavis-Cummings Model

    CERN Document Server

    Fujii, K; Kato, R; Suzuki, T; Wada, Y; Fujii, Kazuyuki; Higashida, Kyoko; Kato, Ryosuke; Suzuki, Tatsuo; Wada, Yukako

    2004-01-01

    To obtain the explicit form of evolution operator in the Tavis-Cummings model we must calculate the term ${e}^{-itg(S_{+}\\otimes a+S_{-}\\otimes a^{\\dagger})}$ explicitly which is very hard. In this paper we try to make the quantum matrix $A\\equiv S_{+}\\otimes a+S_{-}\\otimes a^{\\dagger}$ diagonal to calculate ${e}^{-itgA}$ and, moreover, to know a deep structure of the model. For the case of one, two and three atoms we give such a diagonalization which is first nontrivial examples as far as we know, and reproduce the calculations of ${e}^{-itgA}$ given in quant-ph/0404034. We also give a hint to an application to a noncommutative differential geometry. However, a quantum diagonalization is not unique and is affected by some ambiguity arising from the noncommutativity of operators in quantum physics. Our method may open a new point of view in Mathematical Physics or Quantum Physics.

  11. E. E. Cummings: From Parenthesis to Personality (Part II

    Directory of Open Access Journals (Sweden)

    Uroš Mozetič

    2007-06-01

    Full Text Available The paper presents the unique oeuvre of E.E. Cummings; who claims an outstanding position in the heritage of American poetry; as a case of Bildungsdichtung. This status is largely due to his highly innovative and iconoclastic approach to poetic composition; starting from his early rebellious endeavours drawing on an astounding variety of non-standard and downright shocking potentialities of the English language (including such peculiar linguistic and stylistic idiosyncracies as drastic changes of the syntactic English word order; shifts at the morphology and word-formation level; unorthodox use of punctuation; extravagant typography and spacing or arrangement of space between the lines; a diversity of meters and rhymes; as well as seemingly eccentric imagery; to his later and invariably maturer poetic diction – the diction of one who has apparently come to terms with the world and his fellow-beings; realising that genuine wisdom resides in the understanding and forgiveness of the inherently fallible human nature rather than in its continuous sardonic scrutiny.

  12. Afterword to Krazy: George Herriman's Krazy Kat cartoon and its appeal to E. E. Cummings.

    Science.gov (United States)

    Forrest, David V

    2002-01-01

    George Herriman's "Krazy Kat," a linguistically innovative and trenchant comic strip that appeared in newspapers from 1916-1944, attracted the attention of our major American poet, e. e. cummings, who wrote a foreword to a collection of the strips and admired it for its transcendent celebration of love over egoism in a triadic relationship, its scorn of politics, and its brick-throwing irreverence. Similarities between Cummings's and Herriman's work include language play, humorous voices, examinations of dimensions of empathy and theory of mind, musicality, and humanistic religiosity.

  13. Squeezing effect of the cavity field in the two-atom Jay nes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Authors investigate the model that two two-level atoms in terac t with a single-mode cavity. The formulation of the time evolution operator for the two-atom Jaynes-Cummings model is presented by the bare-states approach. Besides, squeezing effect of the cavity field is studied and some novel feature s are obtained.

  14. Photon statistical properties of the cavity field in the two-atom Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The model that two two-level atoms interact with a singel-mode cavity is studied. The exact solution of the time evolution operator for the two-atom Jaynes-Cummings model is presented by the bare-states approach. Furthermore, we investigate the dynamical properties of the photon statistics of the cavity field, and obtain a number of novel features.

  15. Entanglement in Three-Atom Tavis-Cummings Model Induced by a Thermal Field

    Institute of Scientific and Technical Information of China (English)

    CAI Jin-Fang; LIU Hui-Ping

    2005-01-01

    The explicit form of the evolution operator for the three-atom Tavis-Cummings model is given. The atoms can be entangled through their interaction with a thermal field. The degree of entanglement depends on the mean photon number of the thermal field and the initial state of the atoms.

  16. Measurement Induced Enhancement of Squeezing in Nondegenerate Two-Photon Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    YE Sai-Yun

    2006-01-01

    Squeezing properties in the nondegenerate two-photon Jaynes-Cummings model are investigated. The effects of direct selective atomic measurement and the application of the classical field followed by atomic measurement are analyzed. Different values of the parameters of the classical field are taken into account. It is found that the field squeezing can be enhanced by measurement.

  17. La prohibición del pacto comisorio en los negocios fiduciarios cum creditore

    OpenAIRE

    Tudela Chordá, Sergio

    2015-01-01

    Estudio del pacto comisorio en los negocios fiduciarios cum creditore, partiendo de los antecedentes de Derecho Romano, Derecho Medieval español y antecedentes españoles contemporáneos. Análisis de la prohibición del pacto comisorio, su justificació

  18. Evolution of Bell- nonlocality of two cavity fields in the double Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Long Miao; Yunkun Jiang

    2011-01-01

    The Bell-nonlocality of two initially entangled macroscopic fields in the double Jaynes-Cummings model is investigated.Moreover,the process by which detuning between the atomic transition frequency and the field frequency affects the evolution of the Bell-nonlocality of two macroscopic fields is studied.The effect of the disparity between the two coupling strengths is discussed.

  19. A Stylistic Study on the Linguistic Deviations in E. E. Cummings' Poetry

    Science.gov (United States)

    Li, Xin; Shi, Mengchen

    2015-01-01

    Regarded as the pioneer of experimental poetry, E. E. Cummings' unconventional treatment of poetic language has reached an unprecedented acme, which has intrigued and baffled numerous scholars, researchers and readers alike. Nevertheless, the very existence of poetry, like other types of literary texts, demonstrates the significance and value of…

  20. Berry phase in a two-atom Jaynes-Cummings model with Kerr medium

    Science.gov (United States)

    Bu, Shen-Ping; Zhang, Guo-Feng; Liu, Jia; Chen, Zi-Yu

    2008-12-01

    The Jaynes-Cummings model (JCM) is an very important model for describing interaction between quantized electromagnetic fields and atoms in cavity quantum electrodynamics (QED). This model is generalized in many different directions since it predicts many novel quantum effects that can be verified by modern physics experimental technologies. In this paper, the Berry phase and entropy of the ground state for arbitrary photon number n of a two-atom Jaynes-Cummings model with Kerr-like medium are investigated. It is found that there is some correspondence between their images, especially the existence of a curve in the Δ-ɛ plane along which the energy, Berry phase and entropy all reach their special values. So it is available for detecting entanglement by applying Berry phase.

  1. Theoria cum praxi? Über die (Un-?) Vereinbarkeit wissenschaftlicher und ökonomischer Anforderungen

    OpenAIRE

    Kritzmöller, Monika

    2004-01-01

    Gottfried Wilhelm LEIBNIZ maß der Zusammenarbeit und wechselseitigen Befruchtung von Theorie und Praxis ein derart hohes Gewicht bei, dass er das Motto "Theoria cum praxi" bereits 1696 als Wahlspruch über sein Gesamtwerk stellte. An der Notwendigkeit einer Kooperation zwischen Praxis – und damit zumeist: Wirtschaft – und Wissenschaft hat sich seither nicht viel geändert. Dennoch wäre es ein Trugschluss zu glauben, dass die vergangenen drei Jahrhunderte zu einem Kraftschluss zwischen beiden Sp...

  2. Nursing's new paradigm is transcultural nursing: an interview with Madeleine Leininger. Interview by Susan Cummings.

    Science.gov (United States)

    Leininger, M

    1996-01-01

    Around the world, transcultural nursing is being developed to provide culturally competent, congruent, humanistic health care. In this article, Susan Cummings, Associate Editor of Advanced Practice Nursing Quarterly, interviews Madeleine Leininger, founder of transcultural nursing and leader in human care nursing research. For the past 40 years Dr. Leininger has been instrumental in developing concepts, definitions, and a theoretical and research base for the development of transcultural nursing with a human care focus.

  3. A CATASTROPHIC-CUM-RESTORATIVE QUEUING SYSTEM WITH CORRELATED BATCH ARRIVALS AND VARIABLE CAPACITY

    Directory of Open Access Journals (Sweden)

    Rakesh Kumar

    2008-07-01

    Full Text Available In this paper, we study a catastrophic-cum-restorative queuing system with correlated batch arrivals and service in batches of variable sizes. We perform the transient analysis of the queuing model. We obtain the Laplace Transform of the probability generating function of system size. Finally, some particular cases of the model have been derived and discussed. Keywords: Queue length, Catastrophes, Correlated batch arrivals, Broadband services, Variable service capacity, and Restoration.

  4. Mean field and collisional dynamics of interacting fermion-boson systems the Jaynes-Cummings model

    CERN Document Server

    Takano-Natti, E R

    1996-01-01

    A general time-dependent projection technique is applied to the study of the dynamics of quantum correlations in a system consisting of interacting fermionic and bosonic subsystems, described by the Jaynes-Cummings Hamiltonian. The amplitude modulation of the Rabi oscillations which occur for a strong, coherent initial bosonic field is obtained from the spin intrinsic depolarization resulting from collisional corrections to the mean-field approximation.

  5. Atomic and field dynamics in the time-dependent Jaynes-Cummings model with arbitrary detuning

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    We propose a general numerical method for solving the time -dependent Jaynes-Cummings model with arbitrary detuning by integrating relate d groups of coupled equations using Runge-Kutta numerical technique. The atomic and field dynamics such as evolution of atomic population inversion and second -order correlation function of photons are studied in case of different detunin g. The results show that the field tends to exhibit bunching effect due to the I ncreasing of detuning.

  6. Measurement-induced chaos and quantum state discrimination in an iterated Tavis-Cummings scheme

    OpenAIRE

    Torres, Juan Mauricio; Bernád, József Zsolt; Alber, Gernot; Kálmán, Orsolya; Kiss, Tamás

    2016-01-01

    A cavity quantum electrodynamical scenario is proposed for implementing a Schr\\"odinger microscope capable of amplifying differences between non orthogonal atomic quantum states. The scheme involves an ensemble of identically prepared two-level atoms interacting pairwise with a single mode of the radiation field as described by the Tavis-Cummings model. By repeated measurements of the cavity field and of one atom within each pair a measurement-induced nonlinear quantum transformation of the r...

  7. A generalized Jaynes-Cummings model: The relativistic parametric amplifier and a single trapped ion

    Energy Technology Data Exchange (ETDEWEB)

    Ojeda-Guillén, D., E-mail: dojedag@ipn.mx [Escuela Superior de Cómputo, Instituto Politécnico Nacional, Av. Juan de Dios Bátiz esq. Av. Miguel Othón de Mendizábal, Col. Lindavista, Delegación Gustavo A. Madero, C.P. 07738 Ciudad de México (Mexico); Mota, R. D. [Escuela Superior de Ingeniería Mecánica y Eléctrica, Unidad Culhuacán, Instituto Politécnico Nacional, Av. Santa Ana No. 1000, Col. San Francisco Culhuacán, Delegación Coyoacán, C.P. 04430 Ciudad de México (Mexico); Granados, V. D. [Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Ed. 9, Unidad Profesional Adolfo López Mateos, Delegación Gustavo A. Madero, C.P. 07738 Ciudad de México (Mexico)

    2016-06-15

    We introduce a generalization of the Jaynes-Cummings model and study some of its properties. We obtain the energy spectrum and eigenfunctions of this model by using the tilting transformation and the squeezed number states of the one-dimensional harmonic oscillator. As physical applications, we connect this new model to two important and novelty problems: the relativistic parametric amplifier and the quantum simulation of a single trapped ion.

  8. Metabolic factors-triggered inflammatory response drives antidepressant effects of exercise in CUMS rats.

    Science.gov (United States)

    Liu, Weina; Wang, Hongmei; Wang, Yangkai; Li, Haipeng; Ji, Liu

    2015-08-30

    Chronic stress is a potential contributing factor for depression, accompanying with metabolic and inflammatory response. Exercise is considered as a treatment for depression, but mechanisms underlying its beneficial effects still remain unknown. The objectives of present study were to confirm that metabolic factors-triggered inflammatory response mediates the antidepressant actions of exercise in chronic unpredictable mild stress (CUMS) rats. It has been found that CUMS stimulated expression of ghrelin and its receptor Ghsr, but inhibited expression of leptin and its receptor LepRb. Ghrelin, via binding to Ghsr, induced phosphorylation of GSK-3β on Tyr216 and decreased phosphorylation on Ser9, thus increasing GSK-3β activity. Conversely, ghrelin binding to Ghsr decreased STAT3 activity, through decreasing phosphorylation of STAT3 on Tyr705 and increasing Ser727 phosphorylation. Negatively correlated with ghrelin, leptin binding to LepRb had opposite effects on the activity of GSK-3β and STAT3 via phosphorylation. In addition, decreased leptin level initiated NLRP3 activity via LepRb. Furthermore, GSK-3β inhibited STAT3 activation, thus promoting the expression of NLRP3. Meanwhile, swim improved metabolic and inflammatory response both in CUMS and control rats. Our findings suggest that exercise not only ameliorates metabolic disturbance and inflammatory response in depression, but also contributes to metabolic and inflammatory function in normal conditions.

  9. Roles de los Centros Universitarios Municipales (CUM en el desarrollo local de los municipios cubanos

    Directory of Open Access Journals (Sweden)

    Carlos A. Hernández M.

    2012-06-01

    Full Text Available Se conceptualiza en el aporte de la Educación Superior al Desarrollo Local en los municipios, cómo se inserta en el proceso, las amenazas a su participación y las oportunidades generadas por su inclusión. Se analiza la situación actual y perspectiva y las Estrategias a seguir por la Educación Superior en los municipios. Se define como se trabaja la seguridad alimentaria en función del Desarrollo Local, la superación de Postgrado en el CUM, la formación y superación de los cuadros, la participación en proyectos pertinentes en energía, medio ambiente, servicios a la población, industrias locales y problemas socio - comunitarios y la formación vocacional y articulación pertinente con la Enseñanza Técnico Profesional. Por último se hace una propuesta de Indicadores y herramientas para medir el impacto de la Gestión del Conocimiento y la Innovación dentro del Programa de Desarrollo Local dividida en 2 grupos: Indicadores de funcionamiento interno del CUM e Indicadores de funcionamiento del CUM hacia el Desarrollo Local del Municipio.

  10. Chronic antidepressant administration alleviates frontal and hippocampal BDNF deficits in CUMS rat.

    Science.gov (United States)

    Zhang, Yang; Gu, Fenghua; Chen, Jia; Dong, Wenxin

    2010-12-17

    Stress activates the hypothalamo-pituitary-adrenal (HPA) axis, regulates the expression of brain-derived neurotrophic factor (BDNF) in the brain, and mediates mood. Antidepressants alleviate stress and up-regulate BDNF gene expression. In this study, we investigated the effect of chronic unpredictable mild stress (CUMS) and the different kinds of antidepressant treatments on the HPA axis and the BDNF expression in the rat brain. Adult Wistar male rats were exposed to a six-week CUMS procedure and received different antidepressant treatments including venlafaxine, mirtazapine, and fluoxetine. Immunohistochemistry and real-time PCR were used to measure BDNF expression levels in the rat brain, and ELISAs were used to investigate the plasma corticosterone (CORT) and adrenocorticotropic hormone (ACTH) levels. CUMS significantly decreased the BDNF protein level in the DG, CA1, and CA3 of the hippocampus and increased plasma CORT level. Chronic antidepressant treatments all significantly increased BDNF protein levels in the hippocampus and the pre-frontal cortex. In addition, venlafaxine and mirtazapine inhibited the increase of plasma CORT level. These results suggested that an increase in the BDNF level in the brain could be a pivotal mechanism of various antidepressants to exert their therapeutic effects.

  11. Cum se traduce ‘rușinea’. Abordare traductologică (I

    Directory of Open Access Journals (Sweden)

    Magda Jeanrenaud

    2017-03-01

    Full Text Available Pornind de la sfera semantică și lexicală a conceptelor honte (limba franceză și, respectiv, rușine (limba română, îmi propun să examinez modul cum se traduce acesta în limba română pornind de la un studiu de caz. În acest scop, voi încerca să elaborez un studiu traductologic comparativ al lucrării lui Boris Cyrulnik, intitulată Mourir de dire. La honte (Éditions Odile Jacob, Paris, 2010 și a traducerii sale în limba română, intitulată Mai bine mor decît să spun. Rușinea (traducere din limba franceză de Valentin Protopopescu, Editura Trei, col. „Psihologia pentru toți”, București, 2012. Textul lui Cyrulnik are o particularitate: oscilează între factura literară și cea a unui text specializat. Din acest punct de vedere, transpunerea lui pune la încercare teoriile funcționaliste ale traducerii și, mai ales, teoria skopos-ului elaborată de Katharina Reiss și Hans Vermeer: este interesant de analizat cum „decodează” traducătorul „intenționalitatea” acestui tip de text, totuși specializat, cum decide el să transpună sfera sa semantică și lexicală în limba română.

  12. Landau-Zener extension of the Tavis-Cummings model: Structure of the solution

    Science.gov (United States)

    Sun, Chen; Sinitsyn, Nikolai A.

    2016-09-01

    We explore the recently discovered solution of the driven Tavis-Cummings model (DTCM). It describes interaction of an arbitrary number of two-level systems with a bosonic mode that has linearly time-dependent frequency. We derive compact and tractable expressions for transition probabilities in terms of the well-known special functions. In this form, our formulas are suitable for fast numerical calculations and analytical approximations. As an application, we obtain the semiclassical limit of the exact solution and compare it to prior approximations. We also reveal connection between DTCM and q -deformed binomial statistics.

  13. Wave packet approach to the Jayne-Cummings and Rabi models

    CERN Document Server

    Larson, J

    2006-01-01

    This paper numerically studies the Jaynes-Cummings model with and without the rotating wave approximation in a non-standard way. Expressing the models with field quadrature operators, instead of the typically used boson ladder operators, a wave packet propagation approach is applied. The obtained evolved wave packets are then used to calculate various quantities, such as, Rabi oscillations, squeezing and entanglement. Many of the phenomenon can be explained from the wave packet evolution, either in the adiabatic or diabatic frames. Different behaviours of the two models are discussed.

  14. Level crossing in a two-photon Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Ren Xue-Zao; Cong Hong-Lu; Liao Xu; Li Lei

    2012-01-01

    In this paper,the energy spectrum of the two-photon Jaynes-Cummings model(TPJCM)is calculated exactly in the non-rotating wave approximation(non-RWA),and we study the level-crossing problem by means of fidelity.A narrow peak of the fidelity is observed at the level-crossing point,which does not appear at the avoided-crossing point.Therefore fidelity is perfectly suited for detecting the level-crossing point in the energy spectrum.

  15. Exact non-Markovian master equation for the spin-boson and Jaynes-Cummings models

    Science.gov (United States)

    Ferialdi, L.

    2017-02-01

    We provide the exact non-Markovian master equation for a two-level system interacting with a thermal bosonic bath, and we write the solution of such a master equation in terms of the Bloch vector. We show that previous approximated results are particular limits of our exact master equation. We generalize these results to more complex systems involving an arbitrary number of two-level systems coupled to different thermal baths, providing the exact master equations also for these systems. As an example of this general case we derive the master equation for the Jaynes-Cummings model.

  16. A Lower Bound on the Entanglement in the Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    CAI Jin-Fang; ZOU Jian

    2005-01-01

    @@ The entanglement between an atom and field is investigated by using the Jaynes-Cummings model. The initial atomic state is supposed in a mixed state and the field is in a squeezed state. The lower bound on the entanglement quantified by concurrence is calculated. It is found that the entanglement with the atom being initially in a mixed state can be larger than that with the atom being initially in a pure state. The entanglement is not a monotone function of the squeezing parameter r of the field and it achieves the maximum for certain r and then decreases with further increase of r.

  17. THE TWO-PHOTON DEGENERATE JAYNES-CUMMINGS MODEL WITH AND WITHOUT ROTATING-WAVE APPROXIMATION

    Institute of Scientific and Technical Information of China (English)

    ZHOU LING; SONG HE-SHAN; YAO LI

    2001-01-01

    We take into account the two-photon process and generalize the Jaynes-Cummings (JC) model to the case of atomic level degenerate in the projections of the angular momenta, and we establish two-photon degenerate JC models with and without the rotating-wave approximation (RWA) quantum theory. Comparing the atom population inversion of the generalized JC model with that of the original JC model, we found that the revival period of the degenerate JC model becomes longer and the maximum amplitude of atomic inversion decreases with RWA. Without RWA, the quantum chaos of the generalized JC model is much weaker than that of the original JC model

  18. High-fidelity readout in circuit quantum electrodynamics using the Jaynes-Cummings nonlinearity.

    Science.gov (United States)

    Reed, M D; DiCarlo, L; Johnson, B R; Sun, L; Schuster, D I; Frunzio, L; Schoelkopf, R J

    2010-10-22

    We demonstrate a qubit readout scheme that exploits the Jaynes-Cummings nonlinearity of a superconducting cavity coupled to transmon qubits. We find that, in the strongly driven dispersive regime of this system, there is the unexpected onset of a high-transmission "bright" state at a critical power which depends sensitively on the initial qubit state. A simple and robust measurement protocol exploiting this effect achieves a single-shot fidelity of 87% using a conventional sample design and experimental setup, and at least 61% fidelity to joint correlations of three qubits.

  19. Atom-field entanglement in the Jaynes Cummings model without rotating wave approximation

    Institute of Scientific and Technical Information of China (English)

    M. Mirzaee; M. Batavani

    2015-01-01

    In this paper, we present a structure for obtaining the exact eigenfunctions and eigenvalues of the Jaynes–Cummings model (JCM) without the rotating wave approximation (RWA). We study the evolution of the system in the strong coupling region using the time evolution operator without RWA. The entanglement of the system without RWA is investigated using the Von Neumann entropy as an entanglement measure. It is interesting that in the weak coupling regime, the population of the atomic levels and Von Neumann entropy without RWA model shows a good agreement with the RWA whereas in strong coupling domain, the results of these two models are quite different.

  20. Entanglement evolution and transfer in a double Tavis-Cumming model in cavity QED

    Institute of Scientific and Technical Information of China (English)

    Xu Qing-Jun; Zhang Shi-Ying

    2009-01-01

    We have studied entanglement evolution and transfer in a double Tavis-Cumming model where two pairs of entangled two-level atoms AB and CD interact with two single-mode cavity fields a and b. We show that the Bell-like initial state of atoms AB can exhibit entanglement sudden death which should be independent of the initial entanglement of atoms CD. Also, we show that the initial entanglement of one atomic pair can he transferred into another pair, as well as the possible subsystems, that become entangled during evolution.

  1. Computer simulation of quantum effects in Tavis-Cummings model and its applications

    Science.gov (United States)

    Ozhigov, Yuri I.; Skovoroda, Nikita A.; Ladunov, Vitalii Y.

    2016-12-01

    We describe computer methods of simulation of Tavis-Cummings based quantum models, and apply those methods to specific tasks, conductivity measurements of atomic excitations in short chains of optical cavities with two-level atoms, C-Sign optical model, and dark states. For the conductivity measurements, we reproduce the dephasing assisted transport and quantum bottleneck effects and show their relation, and study the "which way?" problem. For the C-Sign optical model, we use the model to find optimal parameters of the system to minimize the error. For dark states, we study their collapse due to dephasing noise.

  2. Two-Photon Jaynes-Cummings Model Governed by Milburn Equation with Phase Damping

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    In this paper, we find an analytic solution of the master equation of a non-resonant two-photon JaynesCummings model (JCM) with phase damping with the help of the super-operator technique. We study the influence of phase damping on non-classical effects in the JCM, such as oscillations of the photon-number distribution, revivals of the atomic inversion, and sub-Possion photon statistics. It is demonstrated that the phase damping suppresses the revivals of the atomic inversion and non-classical effects of the cavity field in the JCM.

  3. Coherence Loss of Two-Photon Jaynes-Cummings Model in Dispersive Approximation

    Institute of Scientific and Technical Information of China (English)

    ZHOU Ling; GUO Yan-Qing; SONG He-Shan; LI Chong

    2004-01-01

    Completely solving the dissipative dynamics of nonlinear Jaynes-Cumming model is a very difficult task.In our recent work (Phys. Lett. A284 (2001) 156), we just obtained analytical results of the field dissipative dynamics of the nonlinear JCM. In the present paper, employing the perturbative expansion of master equation, we obtain the density operator of the system (field +atom). The coherence losses of the system and of the atom are investigated when two-photon process is involved. We also study the effect of different atomic initial states and the influence of the field amplitude on the atomic coherence loss.

  4. Comparative performance of coriander dryer coupled to solar air heater and solar air-heater-cum-rockbed storage

    Energy Technology Data Exchange (ETDEWEB)

    Chauhan, P.M.; Choudhury, C.; Garg, H.P. [Indian Inst. of Technology, Centre for Energy Studies, New Delhi (India)

    1996-03-01

    In the present communication, efforts have been made to study the drying characteristics of coriander in a stationary 0.5 tonne/batch capacity deep-bed dryer coupled to a solar air heater and a rockbed storage unit to receive hot air during sunshine and off-sunshine hours, respectively. The drying bed was assumed to consist of a number of thin layers of grains stacked upon each other. The theoretical investigation was made by writing the energy and mass balance equations for different components of the dryer-cum-air-heater-cum-storage and by adopting a finite difference approach for simulation. (author)

  5. Translation problems in E.E. Cummings' experimental poetry: visual appearance, plays on words and punctuation marks

    OpenAIRE

    Gómez Jiménez, Eva María

    2010-01-01

    The purpose of this article is to offer a description and evaluation of the Spanish translations of Cummings' poetry, paying special attention to the differences between them and the original poems. The first part consists of a brief account of the five translations into Spanish by José Casas, Alfonso Canales, Octavio Paz, Ulalume González de León and Juan Cueto-Roig. The second part focuses on three representative features in E. E. Cummings' experimental poetry visual appearance, plays on wo...

  6. Effect of External Radiation Filed on the Properties of the Atoms and Cavity Field in the Tavis-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    王忠纯

    2004-01-01

    @@ We study the properties of the atoms and cavity field in the Tavis-Cummings Model where the two atoms interact each other and also are driven by an external classical field.We consider the special case that the cavity is initially in a coherent state.After work out the atomic inversion, the average photons number and the Mandel parameter in the driven Tavis-Cummings Model, we do numerical analysis of them, and pay special attention to the dynamical behavior of the atoms and the cavity field modified by the external field.

  7. Tournament screening cum EBIC for feature selection with high-dimensional feature spaces

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The feature selection characterized by relatively small sample size and extremely high-dimensional feature space is common in many areas of contemporary statistics.The high dimensionality of the feature space causes serious diffculties:(i) the sample correlations between features become high even if the features are stochastically independent;(ii) the computation becomes intractable.These diffculties make conventional approaches either inapplicable or ine?cient.The reduction of dimensionality of the feature space followed by low dimensional approaches appears the only feasible way to tackle the problem.Along this line,we develop in this article a tournament screening cum EBIC approach for feature selection with high dimensional feature space.The procedure of tournament screening mimics that of a tournament.It is shown theoretically that the tournament screening has the sure screening property,a necessary property which should be satisfied by any valid screening procedure.It is demonstrated by numerical studies that the tournament screening cum EBIC approach enjoys desirable properties such as having higher positive selection rate and lower false discovery rate than other approaches.

  8. An exact algebraic solution of Jaynes-Cummings model%Jaynes-Cummings 模型的一种精确代数解法

    Institute of Scientific and Technical Information of China (English)

    何锐

    2012-01-01

    Based on the SU(2) group structure of Jaynes-Cummings model, its time evolution operator were obtained by using the algebraic method. As an application of the solution, the exact result of state |ψ(t)) of the system evoluting with time at any given time t in the condition that the initial state of system is |e, n) was given. Then, the probability Pe(t) of finding the atom in excited state |e) at time t was obtained in the condition that the initial state of the system is |g,a). The superiority of the solution was discussed lastly.%基于Jaynes-Cummings模型的SU(2)群结构,用代数方法求得该模型的时间演化算符.作为该解法的应用,精确给出了初始态为|e,n〉情况下系统随时间演化到任一时刻t的状态|ψ(t)〉,并求出了系统初始态为|g,α〉的情况下,系统在任一时刻t处于激发态的几率Pe(t).最后讨论了该解法的优越性.

  9. Exact Solution for Jaynes-Cummings Model with Bosonic Field Nonlinearity and Strong Boson-Fermion Coupling

    Institute of Scientific and Technical Information of China (English)

    YANG Jin; YU Wan-Lun; XIANG An-Ping

    2006-01-01

    We use Lewis-Riesenfeld invariant approach to treat the modified Jaynes-Cummings models involving any forms of nonlinearty of the bosonic field when strong boson-fermion couplings are nilpotent Grassmann valued. The general state functions, time evolution operator and the time-evolution expressions for both the bosonic number and the fermionic number are presented.

  10. Exact Solution of the Milburn Equation for the Two-Mode Two-Photon Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    ZOU Xu-Bo; YU Ji-Hua; XU Jing-Bo

    2001-01-01

    We adopt an algebraic method to study the two-mode two-photon Jaynes Cummings model governed by the Milburn equation and find an exact solution of Milburn equation of the system. The influence of the intrinsic decoherence on the nonclassical effects of the system is also discussed.``

  11. Density operator of a system pumped with polaritons: a Jaynes-Cummings-like approach

    Energy Technology Data Exchange (ETDEWEB)

    Quesada, Nicolas; RodrIguez, Boris A [Instituto de Fisica, Universidad de Antioquia, Medellin, AA 1226 Medellin (Colombia); Vinck-Posada, Herbert, E-mail: nquesada@pegasus.udea.edu.co [Departamento de Fisica, Universidad Nacional de Colombia, Ciudad Universitaria, Bogota (Colombia)

    2011-01-19

    We investigate the effects of considering two different incoherent excitation mechanisms on microcavity quantum dot systems modeled using the Jaynes-Cummings Hamiltonian. When the system is incoherently pumped with polaritons it is able to sustain a large number of photons inside the cavity with Poisson-like statistics in the stationary limit, and it also leads to a separable exciton-photon state. We also investigate the effects of both types of pumpings (excitonic and polaritonic) in the emission spectrum of the cavity. We show that the polaritonic pumping considered here is unable to modify the dynamical regimes of the system at variance with the excitonic pumping. Finally, we obtain a closed form expression for the negativity of the density matrices that the quantum master equation considered here generates.

  12. Fock-space localization of polaritons in the Jaynes-Cummings dimer model

    Science.gov (United States)

    Shapourian, Hassan; Sadri, Darius

    2016-01-01

    We present a method to study the semiclassical dynamics of the Jaynes-Cummings dimer model, describing two coupled cavities, each containing a two-level system (qubit). We develop a Fock-space WKB approach in the polariton basis where each site is treated exactly while the intersite polariton hopping is treated semiclassically. We show that the self-trapped states can be viewed as Fock-space localized states. We find that this picture yields the correct critical value of interaction strength at which the delocalization-localization transition occurs. Moreover, the validity of our WKB approach is supported by showing that the quantum spectrum can be derived from a set of Bohr-Sommerfeld quantization conditions and by confirming that the quantum eigenstates are consistent with the classical orbital motion in the polariton band picture. The underlying idea of our method is quite general and can be applied to other interacting spin-boson models.

  13. Quantum revivals of a non-Rabi type in a Jaynes-Cummings model

    Science.gov (United States)

    Ozhigov, Yu. I.; Skovoroda, N. A.; Victorova, N. B.

    2016-11-01

    We study full revivals (e.g., the reappearance in the unitary evolution) of quantum states in the Jaynes-Cummings model with the rotating wave approximation. We prove that in the case of a zero detuning in subspaces generated by two adjacent pairs of energy levels, full revival does not exist for any values of the parameters. In contrast, the set of parameters that allows full revival is everywhere dense in the set of all parameters in the case of a nonzero detuning. The nature of these revivals differs from Rabi oscillations for a single pair of energy levels. In more complex subspaces, the presence of full revival reduces to particular cases of the tenth Hilbert problem for rational solutions of systems of nonlinear algebraic equations, which has no algorithmic solution in the general case. Non-Rabi revivals become partial revivals in the case where the rotating wave approximation is rejected.

  14. Quantum phase transition in a multiconnected superconducting Jaynes-Cummings lattice

    Science.gov (United States)

    Seo, Kangjun; Tian, Lin

    2015-05-01

    The connectivity and tunability of superconducting qubits and resonators provide us with an appealing platform to study the many-body physics of microwave excitations. Here we present a multiconnected Jaynes-Cummings lattice model which is symmetric with respect to the nonlocal qubit-resonator couplings. Our calculation shows that this model exhibits a Mott insulator-superfluid-Mott insulator phase transition at commensurate fillings, featured by symmetric quantum critical points. Phase diagrams in the grand canonical ensemble are also derived, which confirm the incompressibility of the Mott insulator phase. Different from a general-purposed quantum computer, it only requires two operations to demonstrate this phase transition: the preparation and the detection of commensurate many-body ground state. We discuss the realization of these operations in a superconducting circuit.

  15. Effect of Squeezing on the Atomic and the Entanglement Dynamics in the Jaynes-Cummings Model

    CERN Document Server

    Subeesh, T; Ahmed, A B M; Satyanarayana, M Venkata

    2012-01-01

    The dynamics of the Jaynes-Cummings interaction of a two-level atom interacting with a single mode of the radiation field is investigated, as the state of the field is gradually changed from a coherent state to a squeezed coherent state. The effect of mild squeezing on the coherent light is shown to be striking: the photon number distribution gets localized and it peaks maximally for a particular value of squeezing. The atomic inversion retains its structure for a longer time. The mean linear entropy shows that the atom has a tendency to get disentangled from field within the collapse region and also in the revival region, for mild squeezing. These properties are absent for the case of a coherent state or for an excessively squeezed coherent state. We also elucidate a connection between these properties and the photon statistics of the mildly squeezed coherent state; these states have the minimum variance and are also maximally sub-Poissonian.

  16. Measurement-induced chaos and quantum state discrimination in an iterated Tavis-Cummings scheme

    Science.gov (United States)

    Torres, Juan Mauricio; Bernád, József Zsolt; Alber, Gernot; Kálmán, Orsolya; Kiss, Tamás

    2017-02-01

    A cavity quantum electrodynamical scenario is proposed for implementing a Schrödinger microscope capable of amplifying differences between nonorthogonal atomic quantum states. The scheme involves an ensemble of identically prepared two-level atoms interacting pairwise with a single mode of the radiation field as described by the Tavis-Cummings model. By repeated measurements of the cavity field and of one atom within each pair a measurement-induced nonlinear quantum transformation of the relevant atomic states can be realized. The intricate dynamical properties of this nonlinear quantum transformation, which exhibits measurement-induced chaos, allow approximate orthogonalization of atomic states by purification after a few iterations of the protocol and thus the application of the scheme for quantum state discrimination.

  17. Design, development and performance evaluation of chapati press cum vermicelli extruder.

    Science.gov (United States)

    Gurushree, M N; Nandini, C R; Pratheeksha, K; Prabhasankar, P; Hosamane, Gangadharappa Gundabhakthara

    2011-04-01

    Portable and manually operated chapati press cum vermicelli extruder device was designed and fabricated for the preparation of chapatis and vermicelli. Sensory evaluation overall quality scores of 50.15 and 48.4 for pressed chapatis and rolled chapatis respectively showed that quality of chapatis was not adversely affected as a result of mechanical pressing. The difference in chapati making time by manual rolling and machine pressing was 17 s per chapati and was statistically significant (p  0.05) between 2 mm and 3 mm diameter vermicelli. Cooked weight (72.8 g) and water absorption (191.2%) of 2 mm diameter vermicelli was more compared to 3 mm diameter vermicelli (51.75 g, 107%). This machine can also be used as a laboratory model as products of consistent thickness and diameter were obtained.

  18. Approximate and Conditional Teleportation of an Unknown Atomic State with Dissipative Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    ZHOU Yu-Rong; CHEN Chang-Yong; PAN Hui-Mei; GUO Feng; PANG Xiao-Feng

    2008-01-01

    A scheme for approximately and conditionally teleporting an unknown atomic state in dissipative cavity QED is proposed. It is the extension of the scheme of [Phys. Rev. A 69 (2004) 064302], where the cavity mode decay has not been considered and only a time point of system evolution and the corresponding fidelity implementing the teleportation are given. In fact, the cavity mode decay exists really and must be delt with. In this paper, we investigate the influence from the cavity mode decay on the implementation of the approximate and conditional teleportation by means of the dissipative Jaynes Cummings model and then show the analytical expression of the fidelity of realization of the teleportation, Alternatively, our scheme does not involve an additional atom, only requiring two atoms and one single-mode cavity.

  19. Entropy evolution of field with a time-varying frequency in the Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Qiu Changdong

    2012-01-01

    Following Jaynes-Cummings model, the evolution of the field entropy in the system of a two-level atom inter- acting with the single mode coherent field is investigated under rotating-wave approximation. The typical case -- the field frequency variance with time in the form of sine ω = ω0 + usin(wt) has been considered. The influences of the amplitude and angle frequency of the field frequency variance on entropy evolution of the field are discussed by numerical calculations. Calculation results indicate that the field frequency variance influences violently the behavior of field entropy evolution; the larger the amplitude of the field frequency variance is, the stronger the influence of the field frequency variance on the time evolution of field entropy is.

  20. TO IMPROVE THE TCP PERFORMANCE USING CROSS LAYER IN WIRED CUM WIRELESS NETWORK.

    Directory of Open Access Journals (Sweden)

    KANNADASAN. R

    2012-04-01

    Full Text Available Recent development mostly based on the high speed internet access of large amount of data at any time over wireless network. Packets loss can also occur due to link failure in wired cum wireless environment. To reduce the loss rate, packet delay, retransmission time, Wi-Max is proposed with cross layer design. In this paper, to improve the performance TCP in the WI-MAX flow its estimating bandwidth of the each packet, reduce the RTT in retransmission which gives more data transfer rate and also reduce the packet drop ratio. Some layers are merging their functions and provide traffic flow with ARQ in Wi-Max. Each node provides information through Access Point which can uplink and downlink feedback about packet as an ACK or NACK. Retransmission mechanism is used for NACK to resend the lost frame through the access point.

  1. Green Synthesis of Silver Nanorods and Optimization of Its Therapeutic Cum Toxic Dose.

    Science.gov (United States)

    Suganya, T R; Devasena, T

    2015-12-01

    Germinated Fenugreek seeds are relatively rich in flavonoids and polyphenols than dry seeds. Therefore, germinated fenugreek seeds possess better pharmacological activities. We have used an aqueous extract of germinated fenugreek seeds to reduce silver nitrate into nanoscale silver rods. The silver nanorods showed Surface Plasmon peak at 450 nm as revealed from UV visible spectrum. Field Emission Scanning Electron Microscopy images revealed the monodispersity and rod morphology. X ray diffraction spectrum revealed the FCC crystal structure of nanorods. Fourier transform infrared spectroscopy peaks revealed the interaction between the phytochemicals of germinated fenugreek seeds and the silver nanorods. Characterization studies reveal the validation of the proposed green synthesis protocol to produce monodispersed silver nanorods with phytochemical capping. The phytosynthesized silver nanorods exhibited anticancer activity in skin cancer cell line, which may be due to its nanoscale dimension and the surface functionalization. For the first time, we have optimized the therapeutic cum toxic dose of phytostabilized silver nanorods using skin cancer cell model.

  2. Entropy and Entanglement in Master Equation of Effective Hamiltonian for Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    H.A. Hessian; F.A. Mohammed; A.-B.A. Mohamed

    2009-01-01

    In this paper, we analytically solve the master equation for Jaynes-Cummings model in the dispersive regime including phase damping and the field is assumed to be initially in a superposition of coherent states.Using an established entanglement measure based on the negativity of the eigenvalues of the partially transposed density matrix we find a very strong sensitivity of the maximally generated entanglement to the amount of phase damping.Qualitatively this behavior is also reflected in alternative entanglement measures, but the quantitative agreement between different measures depends on the chosen noise model.The phase decoherenee for this model results in monotonic increase in the total entropy while the atomic sub-entropy keeps its periodic behaviour without any effect.

  3. Competitive-cum-cooperative interfirm relations and dynamics in the Japanese semiconductor industry

    CERN Document Server

    Okada, Yoshitaka

    2000-01-01

    Japanese semiconductor firms are well known for obtaining dynamics in a short period of time and achieving even global leadership. A significant portion of their success are attributable to cooperative interfirm relations and the development of intermediate organizational structure based on long-term relationship between firms. The purpose of this book is to explain how interfirm relations contributed to their dynamics during the golden age of the semiconductor industry. Meanwhile this book clarifies the real source of dynamics in interfirm relations and how the firms have interacted. The author concludes that the competitive-cum-cooperative (CCC) interfirm interaction are observed. Quantitative and qualitative findings show that firms enjoy not only flexible cooperation based synergy effects, but also dynamics market-like effects by creating competition among partners through CCC interaction.

  4. Management of open olecranon fractures using clamp-cum-compressor device

    Directory of Open Access Journals (Sweden)

    Kundu Zile

    2009-01-01

    Full Text Available Background: Open fractures of olecranon are not a rare occurrence in patients with road traffic accidents particularly motor bike riders who don′t use elbow guards. Definitive treatment has to be delayed in many till the wound heals. The present study was conducted to evaluate the results of open fractures of olecranon using clamp-cum-compressor device. Materials and Methods: Seventeen patients between the ages of 20 and 45 years of open olecranon fractures reported 5-20 days after injury were treated using an indigenous clamp-cum-compressor. All fractures were Mayo type II-A, i.e., displaced, stable and noncomminuted. Four patients had Gustilo-Anderson grade I and 13 had Gustilo-Anderson grade II open fractures. The patients with transverse or short oblique fractures were included in the study. The apparatus was applied under regional anesthesia after thorough washing and debridement of wounds with few loose sutures applied wherever needed. The wounds healed within 2-4 weeks and fractures united within 8-10 weeks. The elbow was mobilized with apparatus still in place. The results were evaluated by MayoElbow performance score. Results: We achieved excellent results in twelve patients, good in four and poor in one patient, who reported late, hooks of the apparatus were cut through the proximal fragment, leading to union of fracture in elongation and restricted elbow movements. Conclusion: The apparatus was found to be quite useful in transverse and short oblique fractures with contamination or infection, where internal fixation has to be delayed or avoided.

  5. Disturbance of hippocampal H2S generation contributes to CUMS-induced depression-like behavior: involvement in endoplasmic reticulum stress of hippocampus.

    Science.gov (United States)

    Tan, Huiying; Zou, Wei; Jiang, Jiamei; Tian, Ying; Xiao, Zhifang; Bi, Lili; Zeng, Haiying; Tang, Xiaoqing

    2015-04-01

    The chronic unpredictable mild stress (CUMS) model is a widely used experimental model of depression. Exogenous stress-induced neuronal cell death in the hippocampus is closely associated with the pathogenesis of depression. Excessive and prolonged endoplasmic reticulum (ER) stress triggers cell death. Hydrogen sulfide (H2S), the third endogenous signaling gasotransmitter, plays an important role in brain functions as a neuromodulator and a neuroprotectant. We hypothesized that the disturbance of endogenous H2S generation and ER stress in the hippocampus might be involved in CUMS-induced depression-like behaviors. Thus, the present study focused on whether CUMS disturbs the generation of endogenous H2S and up-regulates ER stress in the hippocampus and whether exogenous H2S prevents CUMS-induced depressive-like behaviors. Results showed that CUMS-treated rats exhibit depression-like behavior and hippocampal ER stress responses including up-regulated levels of glucose-regulated protein 78, CCAAT/enhancer binding protein homologous protein, and cleaved caspase-12 expression, while the endogenous generation of H2S in the hippocampus is suppressed in CUMS-treated rats. Furthermore, exogenous H2S prevents CUMS-induced depression-like behavior. These data indicated that CUMS-induced depression-like behaviors are related to the disturbance of endogenous H2S generation and ER stress in the hippocampus and suggested that endogenous H2S and ER stress are novel treatment targets of depression. © The Author 2015. Published by ABBS Editorial Office in association with Oxford University Press on behalf of the Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences.

  6. Seminar Cum Meeting Report: Codata Task Group for Exchangeable Material Data Representation to Support Research and Education

    Directory of Open Access Journals (Sweden)

    T Ashino

    2008-11-01

    Full Text Available On March 4-5, 2008, the CODATA Task Group for Exchangeable Material Data Representation to Support Research and Education held a two day seminar cum meeting at the National Physical Laboratory (NPL, New Delhi, India, with NPL materials researchers and task group members representing material activities and databases from seven countries: European Union (The Czech Republic, France, and the Netherlands, India, Korea, Japan, and the United States. The NPL seminar included presentations about the researchers' work. The Task Group meeting included presentations about current data related activities of the members. Joint discussions between NPL researchers and CODATA task group members began an exchange of viewpoints among materials data producers, users, and databases developers. The seminar cum meeting included plans to continue and expand Task Group activities at the 2008 CODATA 21st Meeting in Kyiv, Ukraine.

  7. Thermal analysis and neutron production characteristics of a low power copper beam dump-cum-target for LEHIPA

    Science.gov (United States)

    Sawant, Y. S.; Thomas, R. G.; Verma, V.; Agarwal, A.; Prasad, N. K.; Bhagwat, P. V.; Saxena, A.; Singh, P.

    2016-01-01

    Monte Carlo simulations of heat deposition and neutron production have been carried out for the low power beam dump-cum-target for the 20 MeV Low Energy High Intensity Proton Accelerator (LEHIPA) facility at BARC using GEANT4 and FLUKA. Thermal analysis and heat transfer calculations have also been carried out using the computational fluid dynamics code CFD ACE+. In this work we present the details of the analysis of the low power beam dump-cum-target designed for conditioning of the accelerator upto a maximum power of 600 kW with a duty cycle of 2% which corresponds to an average power of 12 kW in the first phase.

  8. Acute pulmonary emphysema cum pulmonary edema apparently associated with feeding of Brassica juncea in a dairy buffalo

    OpenAIRE

    Muhammad, Ghulam; Saqib, Muhammad; Naureen, Abeera

    2010-01-01

    This preliminary report describes the occurrence of acute pulmonary emphysema cum pulmonary edema ensuing in extensive subcutaneous emphysematous swellings in a dairy buffalo (Bubalus bubalis) apparently associated with a sudden shift from berseem (Trifolium alexendrinum) to Brassica juncea fodder. Tachypnea, expiratory dyspnea, open-mouth breathing, loud expiratory grunt with abdominal lift, and crackles in ventral aspects of the lungs with normal rectal temperature characterized the conditi...

  9. Superfluid-Mott transitions and vortices in the Jaynes-Cummings-Hubbard lattices with time-reversal-symmetry breaking

    Science.gov (United States)

    Hayward, A. L. C.; Martin, A. M.

    2016-02-01

    We investigate the ground-state behavior of Jaynes-Cummings-Hubbard lattices in the presence of a synthetic magnetic field, via a Gutzwiller ansatz. Specifically, we study the superfluid-Mott transition and the formation of vortex lattices in the superfluid regime. We find a suppression of the superfluid fraction due to the frustration induced by the incommensurate magnetic and spacial lattice lengths. We also predict the formation of triangular vortex lattices inside the superfluid regime.

  10. Linear entropies in the Jaynes-Cummings model with intensity-dependent coupling in a phase-damped cavity

    Institute of Scientific and Technical Information of China (English)

    Zhou Qing-Chun; hu Shi-Ning

    2005-01-01

    We investigate the evolution of a quantum system described by the Jaynes-Cummings model with an arbitrary form of intensity-dependent coupling by displaying the linear entropies of the atom, field and atom-field system in the large detuning approximation. The cavity field is assumed to be coupled to a reservoir with a phase-damping coupling.The effects of cavity phase damping on the entanglement and coherence loss of such a system are studied.

  11. Transition from Jaynes-Cummings to Autler-Townes ladder in a quantum dot-microcavity system

    Science.gov (United States)

    Hopfmann, Caspar; Carmele, Alexander; Musiał, Anna; Schneider, Christian; Kamp, Martin; Höfling, Sven; Knorr, Andreas; Reitzenstein, Stephan

    2017-01-01

    We study experimentally and theoretically a coherently driven strongly coupled quantum dot-microcavity system. Our focus is on physics of the unexplored intermediate excitation regime where the resonant laser field dresses a strongly coupled single exciton-photon (polariton) system resulting in a ladder of laser-dressed Jaynes-Cummings states. In that case, both the coupling of the emitter to the confined light field of the microcavity and to the light field of the external laser are equally important, as proved by observation of injection pulling of the polariton branches by an external laser. This intermediate interaction regime is of particular interest since it connects the purely quantum mechanical Jaynes-Cummings ladder and the semiclassical Autler-Townes ladder. Exploring the driving strength dependence of the mutually coupled system we establish the maximum in the resonance fluorescence signal to be a robust fingerprint of the intermediate regime and observe signatures indicating the laser-dressed Jaynes-Cummings ladder. In order to address the underlying physics we excite the coupled system via the matter component of fermionic nature undergoing saturation—in contrast to commonly used cavity-mediated excitation.

  12. Dark-polariton bound pairs in the modified Jaynes-Cummings-Hubbard model

    Science.gov (United States)

    Maggitti, A.; Radonjić, M.; Jelenković, B. M.

    2016-01-01

    We investigate a one-dimensional modified Jaynes-Cummings-Hubbard chain of N identical QED cavities with nearest-neighbor photon tunneling and periodic boundary conditions. Each cavity contains an embedded three-level atom which is coupled to a cavity mode and an external classical control field. In the case of two excitations and common large detuning of two Raman-resonant fields, we show the emergence of two different species of dark-polariton bound pairs (DPBPs) that are mutually localized in their relative spatial coordinates. Due to the high degree of controllability, we show the appearance of either one or two DPBPs, having the energies within the energy gaps between three bands of mutually delocalized eigenstates. Interestingly, in a different parameter regime with negatively detuned Raman fields, we find that the ground state of the system is a DPBP which can be utilized for the photon storage, retrieval, and controllable state preparation. Moreover, we propose an experimental realization of our model system.

  13. Parity Deformed Jaynes-Cummings Model: “Robust Maximally Entangled States”

    Science.gov (United States)

    Dehghani, A.; Mojaveri, B.; Shirin, S.; Faseghandis, S. Amiri

    2016-12-01

    The parity-deformations of the quantum harmonic oscillator are used to describe the generalized Jaynes-Cummings model based on the λ-analog of the Heisenberg algebra. The behavior is interestingly that of a coupled system comprising a two-level atom and a cavity field assisted by a continuous external classical field. The dynamical characters of the system is explored under the influence of the external field. In particular, we analytically study the generation of robust and maximally entangled states formed by a two-level atom trapped in a lossy cavity interacting with an external centrifugal field. We investigate the influence of deformation and detuning parameters on the degree of the quantum entanglement and the atomic population inversion. Under the condition of a linear interaction controlled by an external field, the maximally entangled states may emerge periodically along with time evolution. In the dissipation regime, the entanglement of the parity deformed JCM are preserved more with the increase of the deformation parameter, i.e. the stronger external field induces better degree of entanglement.

  14. TCP Upload and Download Fairness over IEEE 802.11 Wired-cum-Wireless Heterogeneous Networks

    Institute of Scientific and Technical Information of China (English)

    REN Wei; JIN Hai

    2007-01-01

    A scheme of setting a limit to the TCP sending window size is proposed to improve the TCP fairness between upload and/or download flows in wired-cum-wireless networks. The goodput and delay of the upload and download TCP flows are compared to evaluate the TCP fairness for different schemes, which are the different combinations of setting a limit (64 or 4) to the sending window size and using the delayed acknowledgement (ACK) scheme or not. Extensive simulation results and analysis show that ( 1 )for TCP download flows, setting the limit of sending window size to 4 can improve the fairness; (2) for TCP upload flows, limiting the sending window size and using the delayed ACK strategy are both beneficial to fairness; (3) for TCP download and upload mixture flows, limiting the sending window size to a small value ( e. g. , 4) rather than using the delayed ACK strategy, is the solution to improvement of the fairness; (4) a large delay interval (200 ms or 300 ms) does not result in improvement in fairness and performance; (5) a larger TCP packet size ( 1 400 B) can improve the TCP upload goodput and decrease the download goodput; in contrast, a smaller TCP packet size (560 B) can increase the download goodput and decrease the upload goodput.

  15. Trojan Wave Packets in the Quantum Cavity within the Extended Jaynes-Cummings Model

    Science.gov (United States)

    Kalinski, Matt

    2016-05-01

    Some time ago we have developed the theory of the Trojan Wave Packets (TWP) in the classical strong Circularly Polarized electromagnetic field in terms of the Mathieu generating functions. We have discovered that by the proper partitioning of the Coulomb spectrum i.e. by considering the deviation from the circularity and the vertical tilt of the undressed states as the new quantum numbers we can reduce the problem to the problem of several non-interacting quantum pendula for the Stark-Zeeman field dressed states. The TWP in the infinite physical space however turned out to be weakly unstable due to the spontaneous emission. Here we develop the theory in which the TWP is truly eternal when the electromagnetic interactions are considered quantum and the field is confined by the perfect quantum cavity boundary conditions. First we extend the Jaynes-Cummings (JC) model from the two to the infinite number of levels interacting with the one or two perfectly resonant quantum modes of the electromagnetic field. Similarly the model of JC and our previous pendular model the dressed electron-field eigenstates are constructed within the weakly interacting manifolds. Superpositions of those states are possible with the quantum electron density moving on the circular trajectories.

  16. Climbing the Jaynes-Cummings ladder and observing its nonlinearity in a cavity QED system.

    Science.gov (United States)

    Fink, J M; Göppl, M; Baur, M; Bianchetti, R; Leek, P J; Blais, A; Wallraff, A

    2008-07-17

    The field of cavity quantum electrodynamics (QED), traditionally studied in atomic systems, has gained new momentum by recent reports of quantum optical experiments with solid-state semiconducting and superconducting systems. In cavity QED, the observation of the vacuum Rabi mode splitting is used to investigate the nature of matter-light interaction at a quantum-mechanical level. However, this effect can, at least in principle, be explained classically as the normal mode splitting of two coupled linear oscillators. It has been suggested that an observation of the scaling of the resonant atom-photon coupling strength in the Jaynes-Cummings energy ladder with the square root of photon number n is sufficient to prove that the system is quantum mechanical in nature. Here we report a direct spectroscopic observation of this characteristic quantum nonlinearity. Measuring the photonic degree of freedom of the coupled system, our measurements provide unambiguous spectroscopic evidence for the quantum nature of the resonant atom-field interaction in cavity QED. We explore atom-photon superposition states involving up to two photons, using a spectroscopic pump and probe technique. The experiments have been performed in a circuit QED set-up, in which very strong coupling is realized by the large dipole coupling strength and the long coherence time of a superconducting qubit embedded in a high-quality on-chip microwave cavity. Circuit QED systems also provide a natural quantum interface between flying qubits (photons) and stationary qubits for applications in quantum information processing and communication.

  17. Approach to a Parity Deformed Jaynes-Cummings Model and the Maximally Entangled States

    CERN Document Server

    Dehghani, A; Shirin, S; Amiri, S

    2016-01-01

    A parity deformed Jaynes-Cummings model (JCM) is introduced, which describes an interaction of a two-level atom with a $\\lambda$-deformed quantized field. In the rotating wave approximation (RWA), all eigen-values and eigen-functions of this model are obtained exactly. Assuming that initially the field is prepared in the Wigner cat state (WCS) and the two-level atom is in the excited state, it has been shown that the atomic Rabi oscillations exhibit a quasi-periodic behavior in the collapse and revival patterns. The influence of the deformation parameter on the time evolution of non-classical features of the radiation field such as the sub-Poissonian statistics and squeezing effect are also analyzed. Interestingly, the main finding here is that we can realize maximally entangled atom-field states. In this note it is shown that the high fidelity is possible in the weak coupling regime, while the deformation parameter becomes large values.

  18. Development and evaluation of low cost honey heating-cum-filtration system.

    Science.gov (United States)

    Alam, Md Shafiq; Sharma, D K; Sehgal, V K; Arora, M; Bhatia, S

    2014-11-01

    A fully mechanized honey heating-cum-filtration system was designed, developed, fabricated and evaluated for its performance. The system comprised of two sections; the top heating section and the lower filtering section. The developed system was evaluated for its performance at different process conditions (25 kg and 50 kg capacity using processing condition: 50 °C heating temperature and 60 °C heating temperature with 20 and 40 min holding time, respectively) and it was found that the total time required for heating, holding and filtration of honey was 108 and 142 min for 25 kg and 50 kg capacity of machine, respectively, irrespective of the processing conditions. The optimum capacity of the system was found to be 50 kg and it involved an investment of Rs 40,000 for its fabrication. The honey filtered through the developed filtration system was compared with the honey filtered in a high cost honey processing plant and raw honey for its microbial and biochemical (reducing sugars (%), moisture, acidity and pH) quality attributes. It was observed that the process of filtering through the developed unit resulted in reduction of microbes. The microbiological quality of honey filtered through the developed filtration system was better than that of raw honey and commercially processed honey. The treatment conditions found best in context of microbiological counts were 60 °C temperature for 20 min. There was 1.97 fold reductions in the plate count and 2.14 reductions in the fungal count of honey processed through the developed filtration system as compared to the raw honey. No coliforms were found in the processed honey. Honey processed through developed unit witnessed less moisture content, acidity and more reducing sugars as compared to raw honey, whereas its quality was comparable to the commercially processed honey.

  19. CUM AFECTEAZĂ CONDUCEREA CENTRALĂ POLITICA EXTERNĂ ȘI CEA DECIZIONALĂ ÎN CHINA?

    Directory of Open Access Journals (Sweden)

    Aureliu SINDILA

    2017-07-01

    Full Text Available HOW DOES LEADERSHIP AFFECT FOREIGN POLICY DECISION-MAKING IN CHINA?Chinese New Diplomacy has emerged as a vector in the Asian region first, where it has achieved a considerable visibility. This paper aims to describe the model of the Chinese New Diplomacy, while analyzing its elements and profiles. Taking into account the remarkable influence and the newly centered desires, a fresh era in the Chinese foreign policy has stepped out. This work assembles some views from inside ofChina, making it more valuable for foreigners, who, in my opinion might be very easily biased by different state and non-state actors from abroad.CUM AFECTEAZĂ CONDUCEREA CENTRALĂ POLITICA EXTERNĂ ȘI CEA DECIZIONALĂ ÎN CHINA?Noua Diplomație Chineză a apărut ca vector relativ recent în regiunea asiatică, reușind să atingă o vizibilitate consi­derabilă. În această lucrare ne-am propus să descriem modelul Noii Diplomații Chineze, contextual analizând elementele și profilurile sale. Luând în considerare influența mondială remarcabilă și noile dorințe geopolitice, China a generat o eră nouă în politica externă. Sunt asamblate câteva puncte de vedere din interiorul Chinei, ceea ce face lucrarea valoroasă pentru străini, care, în opinia noastră, ar putea fi foarte ușor influențați de diferiți actori de stat atât din interior, cât și din exterior.

  20. A comparative study of Chinese cosmology cum-humorology with eight elements.

    Science.gov (United States)

    Mahdihassan, S

    1990-01-01

    As agriculturist, man recognized Earth, Heat and Water as essential to plant life and projected them as cosmic elements. Pastoral man observed animals multiply due to reproduction. He realized that reproduction resulted from the union of opposites as male and female. Projecting reproduction, he conceived creation, which then resulted as the union of the cosmic pair of opposites. Heaven and Earth. The Chinese conceived of creation as starting with creative energy in its latent form, as Thai-Chi, meaning the absolute existence. Later, it assumed its dynamic form called Chhi. It was dual-natured with the opposites called Yang (light) and Yin (darkness). The reproductive power was projected as creative energy called Chhi and male and female opposites were projected as the universal pair of opposites as Yang and Yin. Creative energy produced the cosmic elements which in turn produced all creation. The cosmic elements of Chinese cosmology were Wood, Fire, Water, Earth and Metal. They also included the factors of humorology when the following elements had, as contents, items belonging to humorology, Wood-contained Air, Earth.....Moisture; Metal.......Dryness. By assigning dual-sense to three cosmic elements, Chinese humorology came into existence but has incorporated it in its cosmology. It is easy to equate Air = Vayu of Tridosha doctrine of India, Moisture = Kapha, Dryness = Pitta. Then with five elements of cosmology including three with dual-sense, as belonging to humorology, we have eight elements in all as cosmology-cum-humorology. It is obvious that Air, so important in the cosmologies of India and Greece, is no where explicit in Chinese cosmology.(ABSTRACT TRUNCATED AT 250 WORDS)

  1. "Sentire cum Ecclesia" –Archbishop Oscar Romero in a crossfire of dissent

    Directory of Open Access Journals (Sweden)

    Andrzej Dobrzyński

    2006-12-01

    Full Text Available The article Sentire cum Ecclesia Archbishop Romero caught between the fires of division: presents a clear picture of the difficult situation the Archbishop was involved in while ministering the war torn politically explosive Archdiocese of San Salvador (1977-1998 and the importance of maintaining his relationship with Rome. He lived his life between two burning fires: the cold war and the revolution, right and left wing factions, the unity of the Church and Liberation theology, and at the same time bearing within the strain of the dichotomy between the tendency for the mystic and his prophetic gift. The Archbishop was committed to put into practice the teaching of Vatican II, the social doctrine of the Church, and to the documents written by the Latin American Bishops in the conferences of Medellin (1968 and Puebla (1979. Paying attention to the circumstances of the Archdiocese and to the needs of Salvadorian society as a whole, Romero searched for solutions, taking into account his conscience and the Magisterium of the Church, while living a deeply spiritual life. His Episcopal motto, “To be of one mind with the Church” signifies his dedication and compassion with the suffering poor and disenfranchised, and the Church as an institution. Proof of this stems from always referring his feelings back to Rome and his dedication to the poor and persecuted. Even though it is not easy to draw any conclusions or make any judgments regarding Oscar Romero’s mission of the Church in the midst of the countries crisis, the article underlines the Historical-Ecclesiastical perspective that allows the avoidance of myths that continue to exist, in both liberal and conservative Catholic surroundings.

  2. Reconstruction of the Jaynes-Cummings field state of ionic motion in a harmonic trap

    Science.gov (United States)

    Lv, Dingshun; An, Shuoming; Um, Mark; Zhang, Junhua; Zhang, Jing-Ning; Kim, M. S.; Kim, Kihwan

    2017-04-01

    A quantum state is fully characterized by its density matrix or equivalently by its quasiprobabilities in phase space. A scheme to identify the quasiprobabilities of a quantum state is an important tool in the recent development of quantum technologies. One of the most fundamental interaction models in quantum optics is the so-called Jaynes-Cummings model (JCM), which has been massively studied theoretically and experimentally. However, the expected essential dynamics of the field states under the resonant JCM has not been observed experimentally due to the lack of a proper reconstruction scheme. In this paper, we further develop a highly efficient vacuum measurement scheme and study the JCM dynamics in a trapped ion system with the capability of the vacuum measurement to reconstruct its quasiprobability Q function, which is a preferred choice to study the core of the dynamics of a quantum state in phase space. During the JCM dynamics, the Gaussian peak of the initial coherent state bifurcates and rotates around the origin of phase space. They merge at the so-called revival time at the other side of phase space. The measured Q function agrees with the theoretical prediction. Moreover, we reconstruct the Wigner function by deconvoluting the Q function and observe the quantum interference in the Wigner function at half of the revival time, where the vibrational state becomes nearly disentangled from the internal energy states and forms a superposition of two composite states. The scheme can be applied to other physical setups including cavity or circuit-QED and optomechanical systems.

  3. G-CSF improves CUMS-induced depressive behaviors through downregulating Ras/ERK/MAPK signaling pathway.

    Science.gov (United States)

    Li, Hui; Linjuan-Li; Wang, Yaping

    2016-10-28

    Neuronal plasticity in hippocampal neurons is closely related to memory, mood and behavior as well as in the development of depression. Granulocyte colony-stimulating factor (G-CSF) can promote neuronal plasticity and enhance motor skills. However, the function of G-CSF in depression remains poorly understood. In this study, we explored the biological role and potential molecular mechanism of G-CSF on depression-like behaviors. Our results showed that G-CSF was significantly downregulated in the hippocampus of chronic unexpected mild stress (CUMS) rats. Administration of G-CSF significantly reversed CUMS-induced depression-like behaviors in the open field test (OFT), sucrose preference test (SPT) and forced swimming test (FST). Moreover, G-CSF upregulated the expression of synaptic-associated proteins including polysialylated form of neural cell adhesion molecule (PSA-NCAM), synaptophysin (SYN), and postsynaptic density protein 95 (PSD-95) in the hippocampus and G-CSF significantly increased cell viability rate of hippocampal neurons in vitro. Further studies indicated that the renin-angiotensin system (Ras)/extracellular signal-regulated kinase (ERK)/p38 mitogen-activated protein kinase (MAPK) signaling pathways was involved in the regulation of G-CSF on depressive-like behaviors and neuronal plasticity in CUMS rats. Taken together, our results showed that G-CSF improves depression-like behaviors via inhibiting Ras/ERK/MAPK signaling pathways. Our study suggests that G-CSF may be a promising therapeutic strategy for the treatment of depression.

  4. Atom-field entanglement in two-atom Jaynes-Cummings model with intensity-dependent coupling

    OpenAIRE

    Bashkirov, E. K.

    2014-01-01

    An exact solution of the problem of two-atom one- and two-mode Jaynes-Cummings model with intensity-dependent coupling is presented. Asymptotic solutions for system state vectors are obtained in the approximation of large initial coherent fields. The atom-field entanglement is investigated on the basis of the reduced atomic entropy dynamics. The possibility of the system being initially in a pure disentangled state to revive into this state during the evolution process for both models is show...

  5. The effect of degenerate atomic levels on the field state dissipation in two-photon Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    周玲; 宋鹤山; 李崇; 郭彦青

    2003-01-01

    The dissipation of the field in the two-photon Jaynes-Cummings model (JCM) with degenerate atomic levels was studied. The initial degenerate atomic state affects the field coherence loss. When the degenerate atom is initially in an equal probability superposition state, the field coherence loss is smallest. It is found that the degeneracy of the atomic level increases the period of entanglement between the atom and the field. When the degeneracy was considered, the coherence properties of the field could be affected by the reservoir qualitatively, if a nonlinear two-photon process is involved. This is different from the dissipation of one-photon JCM with degenerate atomic levels.

  6. Entropy squeezing for a two-level atom in the Jaynes-Cummings model with an intensity-depend coupling

    Institute of Scientific and Technical Information of China (English)

    李春先; 方卯发

    2003-01-01

    We study the squeezing for a two-level atom in the Jaynes-Cummings model with intensity-dependent coupling using quantum information entropy, and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing. Our results show that, the squeezed component number depends on the atomic initial distribution angle, while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing. Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.

  7. Establishment of HPLC Fingerprint of Ramulus Uncariae Cum Uncis%钩藤HPLC指纹图谱的构建

    Institute of Scientific and Technical Information of China (English)

    何昱; 黄家卫; 杨维

    2011-01-01

    OBJECTIVE: To establish the HPLC fingerprint of Ramulus Uncariae Cum Uncis, and to provide objective basis for the quality control of Ramulus Uncariae Cum Uncis based on the results of the content determination of rhynchophylline and isorhynchophylline. METHODS: The determination was performed on Hypersil BDS C18(250 mm×4.6 mm, 5 μm) column with the mobile phase consisted of methanol-0.02% triethylamine-water (gradient elution). The flow rate was 1.0 mL· min-1 and UV detection wavelength was 254 nm. RESULTS: The HPLC fingerprints of Ramulus Uncariae Cum Uncis were established according to the chromatographic data of 10 batches of samples. The results of similarity evaluation and principle component analysis (PCA)were favorable. CONCLUSION: Established fingerprint reflects the inherent character of Ramulus Uncariae Cum Uncis and can be used for the quality evaluation of it.%目的:建立钩藤药材的高效液相色谱(HPLC)指纹图谱,并结合钩藤碱和异钩藤碱的含量测定结果,为钩藤药材的质量控制提供客观依据.方法:色谱柱为依利特 Hypersil BDS C18(250 mm×4.6 mm,5μm),流动相为甲醇-含0.02%三乙胺的水(梯度洗脱),流速为1.0mL·min-1,紫外检测波长为254nm.结果:依照10个批次样品的色谱数据构建起钩藤药材的HPLC指纹图谱,相似度评价和主成分分析的结果良好.结论:所构建的指纹图谱可以反映钩藤药材的内在组成,作为其质量评价的标准.

  8. Investigations on juvenile fish excluder cum shrimp sorting device (JFE-SSD).

    Science.gov (United States)

    Boopendranath, Menothuparambil Ravunny; Pravin, Puthra; Gibinkumar, Therodath Rajan; Sabu, Sarasan; Madhu, Vettiyattil Ramakrishnan

    2013-12-01

    Penaeid shrimp is a major resource in India contributing about 7.4% of the total marine fish landings. They are mostly landed by small mechanized trawlers. Shrimp trawling generates large quantities of bycatch mostly consisting of juvenile fishes, due to use of small mesh size in codends of trawl nets. Juvenile Fish Excluder cum Shrimp Sorting Device (JFE-SSD) is a bycatch reduction device with an in situ sorting mechanism, which replaces the conventional codend in a trawl. The device was designed to catch shrimps and commercially important fish species using a specially designed oval sorting grid with appropriate bar spacing and dual codends. Shrimp sorting efficiency and bycatch exclusion characteristics of JFE-SSD attached to a 29.6 m shrimp trawl, was tested by experimental fishing along the coastal waters off Cochin, India. Out of a total of 317.07 kg of catch encountered in the JFE-SSD installed trawl, 58.22% was retained in lower codend, 17.53% in upper codend and 24.25%, mostly consisting of juveniles and sub-adults of finfishes and shellfishes, was excluded from upper codend. The mean CPUE registered for upper and lower codend were 7.23±1.04 SE and 5.84±0.96 SE kg h(-1) respectively. The CPUE of shrimps retained in upper and lower codends were significantly different (Kruskal-Wallis test (1,62), P<0.001), but the mean CPUE for fishes did not vary significantly. The average escapement of shrimps and juvenile fishes from upper codend were 0.06±0.02 SE kg h(-1) and 2.40±0.44 SE kg h(-1) respectively. Significant differences in the length composition between upper and lower codends were noticed for Megalaspis cordyla, Stolephorus waitei, Metapenaeus dobsoni and Parapenaeopsis stylifera. The experiments demonstrated in situ sorting ability of the device and its potential to reduce the bycatch of juveniles and sub-adults in shrimp trawls.

  9. Effect of an external radiation field on the properties of the atoms and cavity field in the two-atom Tavis-Cummings model

    Institute of Scientific and Technical Information of China (English)

    王忠纯; 王琪; 张永生; 郭光灿

    2005-01-01

    We study the properties of atoms and cavity field in the two-atom Tavis-Cummings model where the two atoms interact with each other and are also driven by an external classical field. We consider the special case that the cavity is initially in a coherent state. The atomic inversion, the average photons number and the Mandel parameter in the driven Tavis-Cummings model are given and analysed numerically. We pay special attention to the dynamical behaviour of the atoms and the cavity field modified by the external field.

  10. Influence of Stark Shift on Entanglement of Two Qubits in the Two-Photon Tavis-Cummings Model

    Directory of Open Access Journals (Sweden)

    Mastyugin M.S.

    2015-01-01

    Full Text Available Considering two-atom degenerate two-photon Tavis-Cummings model, we investigate the entanglement between two atoms prepared initially in the coherent disentangled states and cavity field prepared in few-photon Fock state, and study the effect of the Stark shift on entanglement. The results show that the atom–atom negativity evolve periodically with time and the periods are affected by the Stark shift and initial coherent atomic state and that the atom–atom entanglement can be greatly enhanced due to the presence of Stark shift. We also have shown that entanglement sudden death effect vanishes for some parameters of the considered system due to the presence of Stark shift. In addition, the entanglement sudden death effect vanishes due to the presence of Stark shift. We have derived that the dynamic Stark shift can be used to control entanglement between two initially disentangled atoms.

  11. Transição de fase Superfluido-Isolante de Mott em redes ópticas via modelo de Jaynes-Cummings-Hubbard

    OpenAIRE

    Gomes, Clélio Brasil Cardoso

    2013-01-01

    Estudamos a transi¸c ao de fase superfluido-isolante de Mott (SF-MI) em redes ´opticas via modelo Jaynes-Cummings-Hubbard utilizando a aproxima¸c ao de f´ermions. Inicialmente fazemos uma revis ao do modelo Jaynes-Cummings que descreve a intera¸c ao de um ´atomo de dois n´ıveis com um campo eletromagn´etico quantizado. Em seguida estudamos as propriedades da transi¸c ao de fase SF-MI no modelo Bose-Hubbard e discutimos as caracter´ısticas das duas fase qu anticas e as condi¸c ...

  12. Dynamics of single photon transport in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system

    Science.gov (United States)

    Wang, Yuwen; Zhang, Yongyou; Zhang, Qingyun; Zou, Bingsuo; Schwingenschlogl, Udo

    2016-01-01

    We study the dynamics of an ultrafast single photon pulse in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system. We find that for any single photon input the transmissivity depends periodically on the separation between the two coupling points. For a pulse containing many plane wave components it is almost impossible to suppress transmission, especially when the width of the pulse is less than 20 times the period. In contrast to plane wave input, the waveform of the pulse can be modified by controlling the coupling between the waveguide and Jaynes-Cummings system. Tailoring of the waveform is important for single photon manipulation in quantum informatics. PMID:27653770

  13. Influence of the gravitational field on the quantum-nondemolition measurement of atomic momentum in the dispersive Jaynes-Cummings model

    Energy Technology Data Exchange (ETDEWEB)

    Mohammadi, M [Physics Department, Science and Research Campus Azad University of Tehran, Tehran (Iran, Islamic Republic of); Naderi, M H [Quantum Optics Group, University of Isfahan, Isfahan (Iran, Islamic Republic of); Soltanolkotabi, M [Quantum Optics Group, University of Isfahan, Isfahan (Iran, Islamic Republic of)

    2006-09-01

    We present a theoretical scheme based on an su(2) dynamical algebraic structure to investigate the influence of a homogeneous gravitational field on the quantum-nondemolition measurement of atomic momentum in the dispersive Jaynes-Cummings model. In the dispersive Jaynes-Cummings model, when detuning is large and the atomic motion is in a propagating light wave, we consider a two-level atom interacting with the quantized cavity field in the presence of a homogeneous gravitational field. We derive an effective Hamiltonian describing the dispersive atom-field interaction in the presence of the gravitational field. We investigate the influence of the gravitational field on both the momentum filter and momentum distribution. Particularly, we find that the gravitational field decreases both the tooth spacing of momentum and the tooth width of momentum.

  14. Dynamics of single photon transport in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system

    KAUST Repository

    Wang, Yuwen

    2016-09-22

    We study the dynamics of an ultrafast single photon pulse in a one-dimensional waveguide two-point coupled with a Jaynes-Cummings system. We find that for any single photon input the transmissivity depends periodically on the separation between the two coupling points. For a pulse containing many plane wave components it is almost impossible to suppress transmission, especially when the width of the pulse is less than 20 times the period. In contrast to plane wave input, the waveform of the pulse can be modified by controlling the coupling between the waveguide and Jaynes-Cummings system. Tailoring of the waveform is important for single photon manipulation in quantum informatics. © The Author(s) 2016.

  15. "Pseudo-invariant Eigen-operator" Method for Deriving Energy-Gap of an Atom-Cavity Jaynes-Cummings Hamiltonian with Atomic Centre-of-Mass Motion

    Institute of Scientific and Technical Information of China (English)

    FAN Hong-Yi; TANG Xu-Bing

    2006-01-01

    Using the "Pseudo-invariant eigen-operator" method we find the energy-gap of the Jaynes-Cummings Hamiltonian model of an atom-cavity system. This model takes the atomic centre-of-mass motion into account. The supersymmetric structure is involved in the Hamiltonian of an atom-cavity system. By selecting suitable supersymmetric generators and using supersymmetric transformation the Hamiltonian is diagonalized and energy eigenvectors are obtained.

  16. What can we learn from the dynamics of entanglement and quantum discord in the Tavis-Cummings model?

    Science.gov (United States)

    Restrepo, Juliana; Rodriguez, Boris A.

    We revisit the problem of the dynamics of quantum correlations in the exact Tavis-Cummings model. We show that many of the dynamical features of quantum discord attributed to dissipation are already present in the exact framework and are due to the well known non-linearities in the model and to the choice of initial conditions. Through a comprehensive analysis, supported by explicit analytical calculations, we find that the dynamics of entanglement and quantum discord are far from being trivial or intuitive. In this context, we find states that are indistinguishable from the point of view of entanglement and distinguishable from the point of view of quantum discord, states where the two quantifiers give opposite information and states where they give roughly the same information about correlations at a certain time. Depending on the initial conditions, this model exhibits a fascinating range of phenomena that can be used for experimental purposes such as: Robust states against change of manifold or dissipation, tunable entanglement states and states with a counterintuitive sudden birth as the number of photons increase. We furthermore propose an experiment called quantum discord gates where discord is zero or non-zero depending on the number of photons. This work was supported by the Vicerrectoria de Investigacion of the Universidad Antonio Narino, Colombia under Project Number 20141031 and by the Departamento Administrativo de Ciencia, Tecnologia e Innovacion (COLCIENCIAS) of Colombia under Grant Number.

  17. Sol-gel-cum-hydrothermal synthesis of mesoporous Co-Fe@Al₂O₃−MCM-41 for methylene blue remediation

    Indian Academy of Sciences (India)

    AMARESH C PRADHAN; ANIMESH PAUL; G RANGA RAO

    2017-03-01

    A combined sol-gel-cum-hydrothermalmethod has been employed to synthesize novelmonometallic (Mn, Fe, Co) and bimetallic (Co-Fe, Mn-Co, Fe-Mn) nanoparticles loaded onto Al₂O₃−MCM-41. Powder XRD, N2 sorption, field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM) measurements show that the materials possess mesoporosity, high surface area and nanosize. Monometallic Fe, Co and Mn @Al₂O₃−MCM-41 and bimetallic Co-Fe, Fe-Mn and Mn-Co @Al₂O₃−MCM-41 materials were tested for methylene blue remediation from aqueous media. In the present study, Co-Fe@Al₂O₃−MCM-41 was found to be an excellent adsorbent. The adsorption efficiency of Co- Fe@Al₂O₃−MCM-41 has been studied as a function of adsorbent dose and pH of the solution. Maximum adsorption of methylene blue was obtained at high pH values of the solution. Framework mesoporosity, high surface area, and narrow pore distribution are the key factors for an efficient adsorption of methylene blue onCo-Fe@Al₂O₃−MCM-41.

  18. Quantum statistical properties of the Jaynes-Cummings model in the presence of a classical homogeneous gravitational field

    Energy Technology Data Exchange (ETDEWEB)

    Mohammadi, M [Department of Physics, Science and Research Campus Azad University of Tehran, Tehran (Iran, Islamic Republic of); Naderi, M H [Quantum Optics Group, Department of Physics, University of Isfahan, Isfahan (Iran, Islamic Republic of); Soltanolkotabi, M [Quantum Optics Group, Department of Physics, University of Isfahan, Isfahan (Iran, Islamic Republic of)

    2007-02-09

    The temporal evolution of quantum statistical properties of an interacting atom-radiation field system in the presence of a classical homogeneous gravitational field is investigated within the framework of the Jaynes-Cummings model. To analyse the dynamical evolution of the atom-radiation system a quantum treatment of the internal and external dynamics of the atom is presented based on an alternative su(2) dynamical algebraic structure. By solving the Schroedinger equation in the interaction picture, the evolving state of the system is found by which the influence of the gravitational field on the dynamical behaviour of the atom-radiation system is explored. Assuming that initially the radiation field is prepared in a coherent state and the two-level atom is in a coherent superposition of the excited and ground states, the influence of gravity on the collapses and revivals of the atomic population inversion, atomic dipole squeezing, atomic momentum diffusion, photon counting statistics and quadrature squeezing of the radiation field is studied.

  19. Formation of three-body entanglement via a vacuum optical cavity induction in Tavis-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Li Yu-Liang; Li Xue-Mei

    2008-01-01

    After briefly introducing Akhtarshenas, concurrence vector and subvector for describing many-body entanglement,we investigate the entanglement formation for a system which contains three bodies, i.e. two identical atoms and a single model cavity field, in the Tavis-Cummings model by calculating the concurrences. The results show that the coupling strength between two atoms, the decay cavity and the atomic spontaneous emission can change the entanglement of formation according to different modes: these factors destroy periodicity and symmetry of all concurrences, and that the coupling strength of two atoms does not change the peak value of concurrence (C), but the strength of decay cavity and the atomic spontaneous emission decline in the peak value of concurrence (C) and the latter is more serious than the former under the same strengths. The concurrence vector and subvector are a useful measure of entanglement for a pure state of the many-body system, in that it can give novel pictures about the entanglements for the entire system and between its inner bodies.

  20. The comparison of rTMS and sertraline ameliorate anxiety-and depression-like behaviors in a rat model of CUMS and the possible mechanism%重复性经颅磁刺激与舍曲林改善CUMS大鼠焦虑抑郁样行为的比较及其机制研究

    Institute of Scientific and Technical Information of China (English)

    王磊; 陈怡环; 杨帆; 彭正午; 谭庆荣

    2013-01-01

    Objective: To compare the effects and the underlying mechanisms of repetitive transcranial magnetic stimulation (rTMS) and sertratline administration in ameliorating anxiety- and depression-like behaviors in a rat model of chronic unpredictable mild stress (CUMS) . Methods: 32 adult male SD rats were randomly divided into control, CUMS, CUMS + rTMS and CUMS + sertraline groups (n = 8 for each group). The behavior of rats were investigated by sucrose preference test, forced swimming test and open-field test, and the expression of cannabinoid receptor type 1 receptor (CB1R) in hippocampus was measured by Western blot. Results: The sucrose preference percentage, horizontal motion distance, the number of entering central region and the expression of CB1R in CUMS group was less than those in control, CUMS + rTMS and CUMS + sertraline groups, but there was no significant difference between CUMS + rTMS group and CUMS + sertraline group; the immobility time in CUMS group was longer than that in other three groups, but there was no significant difference between CUMS + rTMS group and CUMS + sertraline group. Conclusion: Both rTMS and sertraline can improve anxiety and depression behaviors of CUMS rats with no significant difference between the two, the effects of rTMS and sertralin may be mediated by up-regulation of the expression of CB1R.%目的:比较重复性经颅磁刺激(repetitive transcranial magnetic stimulation,rTMS)和舍曲林处理对慢性不可预见温和应激(chronic unpredictable mild stress,CUMS)大鼠焦虑抑郁样行为的改善作用及其可能的作用机制.方法:32只SD大鼠随机分为对照组、CUMS组、CUMS+ rTMS组以及CUMS+舍曲林组,每组8只.采用糖水偏好实验、强迫游泳实验及旷场实验观察各组大鼠行为,并以蛋白质印迹法(Western blot)检测各组大鼠海马内源性大麻素Ⅰ型受体(cannabinoid type 1 receptor,CBlR)的表达.结果:CUMS组糖水偏好值、水平活动度

  1. Estrategia para la mejora de la degradación del ácido p-cumárico mediante selección bacteriana

    OpenAIRE

    Otal, E.; Arnáiz Franco, Carmen; Gutiérrez, J.C.; Lebrato Martínez, Julián

    2003-01-01

    Artículo original escaneado para el Repositorio (archivo delegado) Recientemente está recibiendo gran aceptación el tratamiento integrado quimicobiológico de aguas residuales que contienen compuestos orgánicos defícilmente biodegradables. Sim embargo, estudios realizados con aguas sintéticas con ácido p-cumárico mostraron que el tratamiento químico previo al tratamiento biológico no mejoraba su degradación. En este trabajo se han aislado e identificado estirpes bacterianas capaces de crece...

  2. Linear entropy dynamics of the field in the Jaynes-Cummings model with an intensity-dependent coupling in the dispersive approximation

    Institute of Scientific and Technical Information of China (English)

    李春先; 方卯发

    2003-01-01

    We present the linear entropy dynarmics of the field state in the dispersive cavity in the Jaynes-Cummings model with an intensity-dependent coupling in the dispersive approximation, and investigate the influence of dissipation on entanglement between the field and the atoms. We show that the coherence properties of the field are also affected by the cavity when the nonlinear process of the field interacting with the atoms with an intensity-dependent coupling is involved, and find that the dissipation constant, the intensity of the field and the atomic distribution angle have different influence on the coherence properties of the field.

  3. Elevated dopamine D2 receptor in prefrontal cortex of CUMS rats is associated with downregulated cAMP-independent signaling pathway.

    Science.gov (United States)

    Chen, Cheng; Yang, Jing-mo; Hu, Ting-ting; Xu, Ting-juan; Xu, Wei-ping; Wei, Wei

    2013-09-01

    Because depression is associated with significant morbidity and functional disability, it is important to reveal the mechanism of action. A variety of studies have suggested the involvement of dopaminergic receptors in the pathophysiological mechanism of non-stress-associated depression-like behavior in rodents. Nevertheless, controversy exists about whether chronic stress acts on dopaminergic receptors in the prefrontal cortex. Thus, we investigated the level of dopamine D2 receptors (DRD2) and the possible mechanisms involved in a chronic unpredictable mild stress (CUMS) rat model of depression. The results showed CUMS-induced, depression-like symptoms in the rat, characterized by reduced sucrose consumption and body mass, and increased duration of immobility in a forced swimming test. Moreover, chronic stress upregulated the expression of DRD2 but downregulated protein kinase A (PKA), transcription factor cAMP response element binding protein (CREB), and phospho-CREB (p-CREB) in the prefrontal cortex, as demonstrated by Western blot. Notably, in the rat model of depression, decreased cyclic adenine monophosphate (cAMP) levels and PKA activity were present at the same time, which is consistent with clinical findings in depressed patients. Our findings suggested that dopaminergic system dysfunction could play a central role in stress-related disorders such as depression.

  4. On Improving Ratio/Product Estimator by Ratio/Product-cum-Mean-per-Unit Estimator Targeting More Efficient Use of Auxiliary Information

    Directory of Open Access Journals (Sweden)

    Angela Shirley

    2014-01-01

    Full Text Available To achieve a more efficient use of auxiliary information we propose single-parameter ratio/product-cum-mean-per-unit estimators for a finite population mean in a simple random sample without replacement when the magnitude of the correlation coefficient is not very high (less than or equal to 0.7. The first order large sample approximation to the bias and the mean square error of our proposed estimators are obtained. We use simulation to compare our estimators with the well-known sample mean, ratio, and product estimators, as well as the classical linear regression estimator for efficient use of auxiliary information. The results are conforming to our motivating aim behind our proposition.

  5. Entanglement transfer from two-mode continuous variable SU(2) cat states to discrete qubits systems in Jaynes-Cummings Dimers.

    Science.gov (United States)

    Ran, Du; Hu, Chang-Sheng; Yang, Zhen-Biao

    2016-08-24

    We study the entanglement transfer from a two-mode continuous variable system (initially in the two-mode SU(2) cat states) to a couple of discrete two-state systems (initially in an arbitrary mixed state), by use of the resonant Jaynes-Cummings (JC) interaction. We first quantitatively connect the entanglement transfer to non-Gaussianity of the two-mode SU(2) cat states and find a positive correlation between them. We then investigate the behaviors of the entanglement transfer and find that it is dependent on the initial state of the discrete systems. We also find that the largest possible value of the transferred entanglement exhibits a variety of behaviors for different photon number as well as for the phase angle of the two-mode SU(2) cat states. We finally consider the influences of the noise on the transferred entanglement.

  6. 多光子T-C模型中场熵的演化%Entropy evolution of the field in multiphoton Tavis-Cummings model

    Institute of Scientific and Technical Information of China (English)

    卢道明

    2009-01-01

    Using Tavis-Cummings model,the entropy evolution of the field in interaction of two coupling two-level atoms with the single mode coherent field through multiphoton transition is studied.The influences of coupling coefficient between atoms and initial mean photon number of field on entropy evolution of the field are discussed.The results obtained by numerical calculations show that with increasing of initial mean photon number of field the average of field-entropy increases,and the influence of coupling coefficient between atoms on entropy evolution of the field is small.%利用Tavis-Cummings模型研究了耦合二能级原子通过多光子跃迁与相干态光场相互作用系统中场熵的演化规律,讨论了原子间耦合强度和光场初始平均光子数的变化对场熵演化的影响.数值计算结果表明: 场熵的演化受原子间耦合强度和光场初始平均光子数的变化的影响.随光场初始平均光子数的增大,场熵平均值增大.

  7. Solubility and solubilizing capabilities of aqueous solutions of Extractum Taraxaci e radix cum herba aqu. siccum in light of selected values of general Hildebrand-Scatchard-Fedors theory of solubility

    Directory of Open Access Journals (Sweden)

    Marczyński Zbigniew

    2016-12-01

    Full Text Available Introduction: The general Hildebrand-Scatchard theory of solubility supplemented by Fedors’ solubility parameter −δ12$- \\delta ^{{1 \\over 2}} $ was used to estimate the real solubility by −log x2 (log of the mole fraction of phytochemicals contained in Ext. Taraxaci e radix cum herba aqu. siccum. Surface activity of aqueous solution of extracts was determined and quantified – solubilizing capabilities of solutions of cexp. ≥cmc in relation to cholesterol particle size of Ø=1.00 mm, as well as of ketoprofen were defined.

  8. 多光子集体辐射原子的J-C模型超对称求解%Solving the Jaynes-Cummings Model for Two Collectively Radiating Atoms in Multi-photon Procees by Supersymmetric Transformation

    Institute of Scientific and Technical Information of China (English)

    桂卫军; 黄会明; 胡小光

    2006-01-01

    根据已有的双光子情形具有两个集体辐射原子的Jaynes-Cummings(J-C)模型,将之推广到多光子情形.找出了该模型的超对称生成元,然后用超对称变换的方法十分简洁地求解出了它的能量本征值和能量本征态.

  9. Entropy squeezing and atomic inversion in the k-photon Jaynes—Cummings model in the presence of the Stark shift and a Kerr medium: A full nonlinear approach

    Science.gov (United States)

    H, R. Baghshahi; M, K. Tavassoly; A, Behjat

    2014-07-01

    The interaction between a two-level atom and a single-mode field in the k-photon Jaynes—Cummings model (JCM) in the presence of the Stark shift and a Kerr medium is studied. All terms in the Hamiltonian, such as the single-mode field, its interaction with the atom, the contribution of the Stark shift and the Kerr medium effects are considered to be f-deformed. In particular, the effect of the initial state of the radiation field on the dynamical evolution of some physical properties such as atomic inversion and entropy squeezing are investigated by considering different initial field states (coherent, squeezed and thermal states).

  10. The entanglement evolution of two coupling two-level atoms interacting with a single-mode vacuum field in multiphoton Tavis-Cummings model%The entanglement evolution of two coupling two-level atoms interacting with a single-mode vacuum field in multiphoton Tavis-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Lu Daoming

    2012-01-01

    Using multipohton Tavis-Cummings model, the entanglement evolution of two coupling two-level atoms in Bell states interacting with a single-mode vacuum field is investigated by using negativity. The influences of coupling constants between atoms, the atomic initial states and the photon number of transition on the entanglement evolution of two coupling two-level atoms are discussed. The results obtained using the numerical method show that the entanglement of two atoms is related with coupling constants between atoms, the atomic initial states and the photon number of transition. The two-atom entanglement state will forever stay in the maximum entanglement state when the initial state is |β11 〉 . When the initial state of two atoms is |β 01 〉, the entanglement of two atoms displays periodic oscillation behavior. And its oscillation period decreases with increasing of coupling constant between atoms or the photon number of transition. On the other hand, when the initial state is |β 00 〉 or |β10 ), the entanglement of two atoms displays quasiperiodic oscillation behavior and its oscillation period decreases with increasing of coupling constant between atoms or the photon number of transition.

  11. Efecto del sistema de tutorado, poda de tallos y poda de hojas sobre la calidad del fruto del tomate (lycopersícum esculentum mili.

    Directory of Open Access Journals (Sweden)

    Salinas Octavio

    1994-12-01

    Full Text Available

    El presente trabajo se realizó en la finca La Manila, en el Municipio de Anolaima (Cundinamarca. El objetivo fue evaluar la calidad del tomate (Lycopersícum esculenlum Mili. como respuesta a dos tipos de tutorado, tres niveles de poda en tallo y tres niveles de poda en hoja. El análisis de los resultados presentó diferencias estadísticas en el rendimiento y la calidad frente a los dos tipos de tutorado. La poda de tallos tuvo efectos altamente significativos: las plantas podadas produjeron el mayor porcentaje de frutos de primera calidad y las plantas no podadas produjeron los mayores rendimientos por parcela. La poda de hojas no tuvo efectos significativos sobre la calidad. Se concluyó que, con la poda de tallos, se obtiene mayor porcentaje de frutos de buena calidad por parcela; con plantas a libre crecimiento se obtienen los mayores rendimientos por parcela. La investigación permite concluir que el estrato de mercado al cual va dirigida la producción, define el tipo de manejo que debe dársele a las plantaciones de tomate.

     

     

  12. Higher-order squeezing of atomic dipole in the nonlinear Jaynes-Cummings model%非线性Jaynes-Cummings模型中原子偶极矩的高阶压缩

    Institute of Scientific and Technical Information of China (English)

    田永红; 彭金生

    2001-01-01

    研究了非线性双光子Jaynes-Cummings(J-C)模型系统中原子偶极矩高阶压缩的时间演化特性及其产生条件。结果表明,在弱场条件下,原子偶极矩色散或吸收分量的二阶和六阶量子涨落可被周期性压缩,非线性修正项或失谐量以及热噪声对压缩程度有显著的影响。%The time evolution properties of higher-order squeezing of atomic dipole and its producing conditions in the nonlinear two-photon Jaynes-Cummings model are studied. It is shown that the two-order and six-order quantum fluctuation of the branch part of the atomic dipole chromatic dispersion or absorption can be periodically squeezed in a weak intensity field. The nonlinear correction term, the two-photon frequency detuning and thermal noise have a remarkable influence on the squeezing.

  13. Cum on Feel the Noiz

    Directory of Open Access Journals (Sweden)

    Jamie Allen

    2012-04-01

    Full Text Available A brief review of Joseph Nechvatal's Immersion Into Noise available from Open Humanities Press. We include here a series of videos created using C++ and sounds. For more than twenty years Nechvatal has created art works at the intersections of robotics, noise, and video.

  14. The effective mass of the atom-radiation field system and the cavity-field Wigner distribution in the presence of a homogeneous gravitational field in the Jaynes-Cummings model

    Energy Technology Data Exchange (ETDEWEB)

    Mohammadi, M [Department of Physics, Islamic Azad University-Shahreza Branch, Shahreza, Isfahan (Iran, Islamic Republic of)], E-mail: majid471702@yahoo.com

    2009-07-28

    The effective mass that approximately describes the influence of a classical homogeneous gravitational field on an interacting atom-radiation field system is determined within the framework of the Jaynes-Cummings model. By taking into account both the atomic motion and the gravitational field, a full quantum treatment of the internal and external dynamics of the atom is presented. By exactly solving the Schroedinger equation in the interaction picture, the evolving state of the system is found. The influence of a classical homogeneous gravitational field on the energy eigenvalues, the effective mass of the atom-radiation field system and the Wigner distribution of the radiation field are studied, when the initial condition is such that the radiation field is prepared in a coherent state and the two-level atom is in a coherent superposition of the excited and ground states.

  15. Relationships between hippocampal NMDA receptor and NOS positive neurons in myenteric nerve plexus in stomach of CUMS rats%海马NDMA受体与胃肌间神经丛NOS阳性神经元在慢性应激性胃运动变化中的关系

    Institute of Scientific and Technical Information of China (English)

    乔卉; 何娟; 饶志萍; 徐畅; 安书成

    2012-01-01

    目的 探讨慢性应激对大鼠胃功能和胃肠神经系统的影响,并分析其海马谷氨酸(Glu)离子型受体机制.方法 通过建造慢性应激性抑郁模型大鼠,结合脑立体定位及微量注射Glu和N-甲基-D-天冬氨酸(NMDA)受体阻断剂MK-801,对实验鼠进行糖水偏爱等行为学检测、胃内压记录及胃内在神经丛的一氧化氮合酶(NOS)阳性神经元表达的组织化学检测.结果 慢性不可预见性温和应激(CUMS)动物表现出抑郁样行为,且胃运动减弱;海马注射NMDA受体阻断剂MK-801,可以反转CUMS的效应;海马注射Glu,能增加游泳不动时间,但对胃运动无影响.CUMS使胃肌间神经丛NOS阳性神经元数量减少[(73.74±16.38 )/LPF,P<0.05],神经节数量减少[(4.25±1.34)/LPF,P<0.05],但每个神经节内神经元数量明显增加(6.55±2.37,P<0.05);海马注射MK-801能改善CUMS引起的神经节数量减少的现象.结论 慢性应激诱发的抑郁样行为与海马Glu及其NMDA受体有关,而胃活动的减弱可能与海马NMDA受体变化影响胃肌间神经丛NOS神经元分布格局有关.%Objective To investigate the involvement of hippocampal glutamate and NMDA receptor in the effect of CUMS on gastric function and enteric nervous system ( ENS) . Methods Chronic unpredictability mild stress (CUMS)-induced depression model was established in SD rats, intra-hippocampal microinjections of Glu and non-competitive antagonist of N-methyl-D-aspartic acid (NMDA) receptor (MK-801) were respectively adopted by rat brain stereotaxic coordinates. The behavioral observations were conducted by sucrose preference test and forced swimming test. The intra-gastric pressure was recorded and the expression of Nitric oxide synthase (NOS) positiveneurons in myenteric nerve plexus in stomach was detected as well. Results CUMS rats showed depression-like behavioral changes and weaker gastric motility as compared to control. Preheated with MK-801 could reverse these

  16. A PET study on brain of chronic unpredictable mild stimulations (CUMS)-induced depressive rats%慢性不可预见性温和刺激抑郁症模型大鼠的脑PET成像研究

    Institute of Scientific and Technical Information of China (English)

    刘金鹏; 刘华; 高峻钰; 刘少君

    2015-01-01

    目的:通过PET成像技术研究慢性不可预见性温和刺激( CUMS)致抑郁症大鼠的全脑代谢特点。方法实验组大鼠给予CUMS 4周后,通过糖水偏嗜度、自发活动距离、体质量等指标分为刺激后抑郁大鼠( D组)及刺激后非抑郁大鼠( ND组),并与正常对照组大鼠( CON组)一起行PET检查,比较不同组大鼠之间全脑的代谢变化。结果(1)D组大鼠的双侧S1、丘脑、苍白球、岛叶、M2、左屏状核较CON组代谢升高,右侧下丘、胼胝体压部、小脑则代谢降低;(2)D组大鼠双侧海马CA3区、M1、M2、纹状体、S1、嗅球等区较ND组代谢增高,左侧楔状核及海马则代谢降低;(3) ND组大鼠与CON组相比,无代谢升高的脑区,而外侧隔核、双侧纹状体、下丘脑室旁核、双侧S1、右侧苍白球则代谢降低。结论以前囟后4 mm处为界,抑郁大鼠脑代谢特点是前高后低,左右大致对称。抑郁症的发生可能与多个脑区功能的异常相互作用有关。%Objective To observe the metabolic changes in the whole brain of chronic unpredictable mild stimulations ( CUMS)-induced depressive rats using PET imaging technology.Methods After 4 weeks’ of CUMS, rats of experimental group were divided into two groups:Group D( depression) and Group ND( no depression) , according to the degree of sugar addiction, distance of spontaneous activity and relative body mass.Then metabolic changes in the whole brain of these rats and those in control group ( CON) were observed using PET technology, and the differences were companred between the threegroups.Results (1)ComparedwithGroupCON,metabolismofGroupDwaselevatedinbilateralS1,thalamus, globus pallidus, insula, M2 and left claustrum, but descended in right inferior colliculus, splenium of corpus callosum and cerebellum.(2) Metabolism of Group D increased in the bilateral CA3 region of hippocampus, M1, M2, striatum, S1 and olfactory bulb

  17. ABR Changes in a Rat Model of CUMS Induced Depression%慢性不可预见性温和刺激大鼠模型的听性脑干反应的改变

    Institute of Scientific and Technical Information of China (English)

    陈抗松; 廖华; 杨希林; 陈建新

    2013-01-01

    Objective To study changes of auditory brainstem response (ABR) in a rat model of depression induced by chronic unpredictable mild stress (CUMS). Methods Sixteen rats were randomly divided into a control group (n=8) and a mod-el group (n=8). The model group was randomly treated with CUMS every day to keep animals in a depressive state for 28 days. Animal behaviors were recorded using an automatic tracking system at 1 day before experiment and on Days 14 and 28. In the present study, ABRs were tested using a TDT system on Day 28 for all animals. Results Compared with the control group, the basic indices of animal behavior of the model group were markedly different from the control group on Days 14 and 28 (p0.05). The latencies of waves I and V in the model group were significantly longer than the control group (P<0.05) and the amplitudes of waves II and V were markedly decreased compared to the control group (P<0.05 and P<0.01, respectively). Con-clusion Abnormal neuroelectric activities along the auditory pathway from the peripheral auditory organ to the brainstem may exist in rats with CUMS induced depression .%  目的探讨单纯抑郁症大鼠模型的听性脑干反应(ABR)的改变。方法16只大鼠随机分为对照组(8只):正常喂养;模型组(8只):每天随机给予多种低强度刺激,造成动物的抑郁状态,持续28天。记录各组大鼠实验前1天、第14、28天的行为学,并在造模完成后对两组大鼠行ABR检测。结果造模第14、28天,与对照组比较,模型组大鼠的旷场行为学、体重及摄食量的改变、糖水偏爱均有显著性差异(p<0.01);第28天,在声强90dB SPL条件下,与对照组比较,模型组大鼠的Ⅰ波潜伏期明显延长(P<0.05),Ⅱ波的波幅显著下降,差异有统计学意义(P<0.05)。结论抑郁症模型大鼠可能存在外周听觉神经至脑干通路存在神经电活动的异常。

  18. Aplicación de la regla compensatio lucri cum damno en los supuestos de pérdida de la chance de ayuda económica futura

    Directory of Open Access Journals (Sweden)

    Aldax, Martín

    2012-12-01

    Full Text Available El trabajo demuestra que para determinar la indemnización material por el fallecimiento de un hijo, debe descontarse a la suma otorgada en concepto de pérdida de la chance de ayuda económica futura, las erogaciones dejadas de realizar por los progenitores en beneficio del menor como consecuencia de la muerte. Se encuentra dividido en dos capítulos y una conclusión. En el primer capítulo comprende una breve reseña histórica de la institución, ubica la cuestión dentro de la teoría general del Derecho de daños. Se define la compensatio lucri cum damno y cada uno de los conceptos que la componen, estudiando las generalidades de la institución. En el segundo capítulo se estudia el supuesto específico de compensación en el caso de pérdida de ayuda económica futura del hijo fallecido hacia sus padres, con los gastos y erogaciones dejadas de realizar en beneficio del menor y de las personas por nacer, realizando un análisis de los conceptos, verificando los beneficios computables y sus requisitos. Por último en la conclusión con la que se demuestra la hipótesis de trabajo planteada.

  19. Analysis of Pachymic Acid and Total Terpene Constituents of Poria, Poria cum Pini Radix, Pini Radix in Poria and Pini Radix%茯苓、茯神、茯神木及松根中茯苓酸及总萜类成分分析

    Institute of Scientific and Technical Information of China (English)

    李蒙; 聂磊; 沈佳瑜; 王光忠

    2015-01-01

    s:Objective To compare the contents of pachymic acid and total terpene of Poria, Poria cum Pini Radix, Pini Radix in Poria and Pini Radix.Methods HPLC was used in the determination of content of pachymic acid, colorimetric method was used in analysis of total terpenoid components.Comparison and analysis of total terpenoid components were carried out in different medicinal parts of Poria cocos ( Schw.) Wolf from different areas.Results The content of pachymic acid:Pini Radix in Poria>Poria cum Pini Radix >Poria,and Pini Radix did not.The content of total terpenoid:Pini Radix≈Pini Radix in Poria>Poria cum Pini Radix >Poria.Conclusion The study provides foundation for quality control and evaluation of different pieces of Poria cocos, and to provide scientific basis for the clinical selection of different pieces of Poria cocos.%目的:比较茯苓、茯神、茯神木及松根中茯苓酸及总萜类含量差异。方法采用高效液相色谱法( HPLC )法,测定茯苓酸含量;采用比色法测定总萜类成分含量。并对不同产地及来源的样品进行成分分析比较。结果茯苓酸含量:茯神木>茯神>茯苓,松根无;总萜含量:松根≈茯神木>茯神>茯苓。结论为茯苓不同饮片的质量控制与评价奠定了基础,并为临床选用茯苓不同饮片提供了科学依据。

  20. 多光子Jaynes-Cummings模型中与Glauber-Lachs态相互作用原子的熵压缩%Entropy squeezing of a multiphoton Jaynes-Cummings atom with the Glauber-Lachs state

    Institute of Scientific and Technical Information of China (English)

    冯川; 萨楚尔夫; 李红星

    2014-01-01

    利用全量子理论,研究了多光子Jaynes-Cummings模型中与 Glauber-Lachs态相互作用的混合态原子的信息熵压缩。讨论了相干平均光子数、热平均光子数、跃迁光子数、原子初态参量对原子信息熵压缩的影响。结果表明原子信息熵X分量没有熵压缩性质;相干平均光子数取值适当时,原子信息熵Y分量呈现熵压缩效应;热平均光子数、跃迁光子数会破坏原子信息熵Y分量的熵压缩效应;原子初态参量对原子信息熵Y分量能否呈现熵压缩效应没有决定性作用;伴随双光子跃迁时,原子的熵压缩因子的时间演化曲线呈现周期性。%The information entropy squeezing properties of the atom interacting with the Glauber-Lachs state in multi-photon Jaynes-Cummings model are studied by means of the full quantum theory.The in-fluences of the mean number of the coherent photons,the average number of the thermal photons,the number of the transition photons and the atomic initial state on the information entropy squeezing of the atom are discussed.The results indicate that there is no entropy squeezing in the X component of infor-mation entropy of the atom at any instant of the time evolution of the system.But there exists an entro-py squeezing in the Y component of information entropy of the atom during the time evolution when the mean number of coherent photons takes an appropriate value.The mean number of thermal photons and the number of the transition photons have a destructive effect on theY component of information entropy of the atom.The atomic initial state has no effect on the entropy squeezing in the Y component of infor-mation entropy of the atom.If the number of the transition photons equals to two,the time evolution of the entropy squeezing factor appears periodic change.

  1. SOCIO CUM LINGUISTIC INTERPLAY IN LANGUAGE CHOICE ...

    African Journals Online (AJOL)

    Sir George

    2016-06-02

    Jun 2, 2016 ... Factors germane for language choice and performance. It has been ..... Na only sun we de suffer, oga. We sure say nothing .... Hickerson‟s projection here also reveals one important issue relative to the code and the situation ...

  2. Vademécum de la libertad

    OpenAIRE

    2014-01-01

    En Estos Pensamientos (Que A Veces Pueden Tener La Apariencia De Aforismos),Fruto De La Introspección A Lo Largo Del Tiempo, Hay, Pese A Su Carácterfragmentario, Un Común Denominador, Que Les Confiere La Necesaria Unidad: Esedenominador Común Es La Libertad Del Alma. ¿Y Cómo Puede El Hombre Lograr Lalibertad Del Alma, La Autonomía Que Independiza Al Individuo De Los Factoresexternos?

  3. 黄冈公铁两用长江大桥主墩基础围堰施工技术%Construction Techniques of Cofferdams for Main Pier Foundations of Huanggang Changjiang River Rail-cum-Road Bridge

    Institute of Scientific and Technical Information of China (English)

    金红岩

    2012-01-01

    The main bridge of Huanggang Changjiang River Rail-cum-Road Bridge is a steel truvss girder cable-stayed bridge with double pylons and double cable planes and the foundations for the main piers of the bridge were constructed by the double-wall steel boxed cofferdams. The cofferdams were integrally manufactured and assembled on bank and by means of survey, the o-verall dimensions, pile locations and the locations and concentricity of the upper and lower guiding rings of the cofferdams were controlled in order to ensure that the deviations of the bored piles and pile caps of the main piers could comply with the relevant requirements in the standards after construction and to obtain the accuracy of positioning of the cofferdams according to the results of comprehensive analysis of the survey. The cofferdams were launched to the river by air bags by way of gradually adjusting the launching gradient from 1:30 to 1: 5 so as to ensure the launching speed and sliding distances of the cofferdams. After the cofferdams were launched to the river, they were floated to the pier sites, tugged by the strong house power tug boats and were positioned by the gravity anchors plus positioning barges in three stages of initially positioning, accurately positioning and system transformation. The final accuracy of positioning of the cofferdams in plan is 5 cm, the perpendicularity is within 1/1 000 and the perpendicularity of the steel casings is within 1/500, which all meet the requirements in the standards.%黄冈公铁两用长江大桥主桥为双塔双索面钢桁梁斜拉桥,主墩基础采用双壁钢吊箱围堰法施工.钢吊箱围堰在岸上整体拼装制造,通过测量控制围堰的轮廓尺寸,桩位,上、下导环的位置与同心度等,确保基础施工后主墩钻孔桩及承台施工偏差符合标准要求,并根据实测结果综合分析得出钢围堰的定位精度;采用气囊法下水,将下水坡度从1∶30逐渐调整为1∶5,保证了

  4. Construction Techniques for Upper Cross Beams of Pylons of Huanggang Changjiang River Rail-cum-Road Bridge%黄冈公铁两用长江大桥桥塔上横梁施工技术

    Institute of Scientific and Technical Information of China (English)

    张德致; 张敏; 代皓; 邓永锋

    2013-01-01

    The main bridge of Huanggang Changjiang River Rail-cum-Road Bridge is a cablestayed bridge with a main span 567 m.The upper cross beams of the pylons of the bridge are the prestressed concrete single-cell single-box structures,each being 23.85 m long,8.4 m wide and 8.0 m deep.The pylons were constructed by the hydraulic self-climbing formwork and the upper cross beams and the upper pylon columns were constructed asynchronously.A kind of the construction scheme was adopted for the casting scaffoldings of the upper cross beams,i.e.the shear groves were set in the inner sides of each two pylon columns and the counter tensioned steel brackets were installed as the supports of the scaffoldings.The concrete of the upper cross beam of a pylon was cast in two layers and before the second layer was cast,parts of the prestressing bars were tensioned.The MIDAS Civil was used to establish the model and the construction process of the upper cross beam was analyzed.The results of the analysis show that the casting of the concrete in layers and the tensioning of the prestressing bars in times can effectively reduce the loads on the scaffoldings and the stress of the concrete can satisfy the relevant requirements in the codes.The construction techniques for the upper cross beams of the pylons of the bridge are practical and feasible.With the techniques,the rapid construction of the pylons is achieved.%黄冈公铁两用长江大桥主桥为主跨567 m的斜拉桥.该桥桥塔上横梁为单箱单室预应力混凝土结构,长23.85m、宽8.4m、高8.0m,桥塔采用液压自爬模施工,上横梁与上塔柱采用异步施工.上横梁浇筑支架采用在两塔柱内侧设置剪力槽,安放对拉式钢牛腿作为支架受力支承点的方案.上横梁分2层浇筑,在第2层混凝土浇筑前张拉部分预应力筋.采用MIDAS Civil建模分析上横梁施工过程,结果表明,分层浇筑和分次张拉预应力钢筋可以有效减小现浇支架的荷载,且混凝土应

  5. 用不变量方法解具有非线性场和原子与场非线性耦合的Jaynes-Cummings模型%Invariant method for solving Jaynes-Cummings model with field nonlinearity and strong atom-field coupling

    Institute of Scientific and Technical Information of China (English)

    杨进; 余万伦; 向安平

    2006-01-01

    Single-mode Jaynes-Cummings model with any forms of intensity-dependent atom-field coupling and the nonlinearity of the quantized photonic field are studied by using the invariant method. Due to the fact that this model possessing a supersymmetric structure, an invariant is constructed by the supersymmetric generators in the eigenspace of the conserved supersymmetric generator N′. We then obtain the general wave function, time evolution operator and the time evolution expressions of both the atomic inversion and the photon number for the system.%采用Lewis-Riesenfeld不变量方法研究了具有非线性场和任意形式原子与场相互作用的Jaynes-Cummings模型.该模型由于具有超对称代数结构,因此其Hamiltonian量可用超对称算符的线性组合表示.在算符N′的本征值子空间,用生成元算符构造出系统的不变量后,利用不变量方法求得了系统的一般波函数和时间演化算符,同时也计算了原子布居数和光子数的时间演化表达式.

  6. 单光子和双光子Jaynes-Cummings模型中原子间纠缠突然死亡的研究%Study of Entanglement Sudden Death Between Two Atoms in the One-Photon and Two-Photon Jaynes-Cummings Models

    Institute of Scientific and Technical Information of China (English)

    廖庆洪; 刘晔; 贾书磊

    2012-01-01

    通过计算并发度和线性熵研究了单光子和双光子Jaynes-Cummings模型中两原子系统的纠缠随时间的演化特性,分析了原子初始纠缠度和不同腔场初态对并发度的影响.结果表明,当腔场初始处于|11>态时,两原子之间的纠缠出现突然死亡现象,纠缠死亡的持续时间依赖于原子初始纠缠度;并且发现两原子和腔场之间在整个时间演化过程中一直保持着纠缠状态.%The entanglement dynamics of two atoms in the one-photon and two-photon Jaynes-Cummings models are studied by employing the concurrence and linear entropy. The effect of the initial entanglement degree of two atoms and the initial state of the cavity field on the time evolution of concurrence is analyzed. The results show that the phenomenon of sudden death of entanglement between two atoms happens when the field is initially in the state (11). The length of the death time interval is dependent on the initial entanglement degree of two atoms. Moreover, it is found that the atom and the field are entangled in the overall time evolution process.

  7. Thermal cum DC Camouflage in Duet with Undecorated Natural Materials

    CERN Document Server

    Yang, Tian-Zhi; Gao, Dongliang; Wu, Linzhi; Li, Baowen; Thong, John T L; Qiu, Cheng-Wei

    2015-01-01

    To manipulate various types of physical signals in one single device has long captivated the attention of scientists and engineers. This however is very challenging, if not impossible, even for emerging metamaterials. Up to date, many artificial materials have been proposed, theoretically and (or) experimentally, for manipulating various waves/signals on a one-function-one-device basis. In this work, for the very first time, we employ undecorated natural materials to experimentally demonstrate a simultaneous camouflage for thermal current and electric dc current on the same device. It demonstrates how ingenuity can overcome the limitations of natural material systems without the need for complex decoration to impart inhomogeneous and (or) anisotropic properties, which was previously considered impossible to accomplish except by using metamaterials.

  8. HISTORIOGRAPHY OF THE PRINT MEDIA: A GLOBAL-CUM ...

    African Journals Online (AJOL)

    user

    2012-07-01

    Jul 1, 2012 ... discourse on its (print media) evolution without recourse to the ... The print media evolved through three historical discoveries or milestones. ..... names in strategic areas of the country, Zik then became the doyen of modern Nigerian. Journalism. He was very imaginative in his plans of awakening political ...

  9. Is "In Consortio Cum Parentibus" the New "In Loco Parentis?"

    Science.gov (United States)

    Henning, Gavin

    2007-01-01

    "In loco parentis" had been the philosophical foundation of higher education policy and practice since 1913 when it was established as a legal doctrine in Gott v. Berea. The doctrine defined the relationship between colleges, students, and parents. That relationship has changed with the death of "in loco parentis" in Dixon v. Alabama Board of…

  10. Performance Of Animal-drawn, Ripper Attached Maize-Cum ...

    African Journals Online (AJOL)

    በፊት ከተሰራው በእርፍና ሞፈር ሊይ ታስሮ ከሚሰራ መዝሪያ (sweeper attached planter, SAP) እና መሬቱን. በነባሩ የአስተራረስ ዘዴ አዘጋጅቶ የሰው ሃይሌ (በእጅ) ዘር ...

  11. Performance of a solar box cooker-cum-dryer

    Energy Technology Data Exchange (ETDEWEB)

    Patel, R.S. [VP and RPTP Science College, Vallabh Vidyanagar, Gujarat (India); Patel, P.D.; Vinodkumar, P.C.; Joshipura, K.N. [Sardar Patel Univ., Vallabh Vidyanagar, Gujarat (India)

    2004-07-01

    The present investigation aims at a simultaneous theoretical and experimental investigation on different aspects of box type solar cooker, and its conversion as a dryer. A theoretical model has been attempted to simulate various thermal processes in a box type solar cooker. The theoretical study has also helped us to identify the sensitive heat exchange coefficients of the different cooker elements. The cooker-dryer designed presently has a potential of enhancing the device utility factor by a fairly large magnitude. This device will also give boost to adopt the solar energy utilization especially in the tropical developing countries. (orig.)

  12. "Cum Poterit"--Rhetorical Exercises for Transitional and Developmental Students

    Science.gov (United States)

    Church, A. P.; Sigrell, Anders

    2005-01-01

    Recently, scholars of rhetoric and composition have shown much interest in the ancient composition exercises known as "progymnasmata". This paper explains how these exercises, which provided ancient students with a transitional curriculum between grammar and rhetoric, have theoretical and practical merit for contemporary compositional…

  13. Laparohysteroscopy in female infertility: A diagnostic cum therapeutic tool in Indian setting.

    Science.gov (United States)

    Puri, Suman; Jain, Dinesh; Puri, Sandeep; Kaushal, Sandeep; Deol, Satjeet Kaur

    2015-01-01

    To evaluate the role of laparohysteroscopy in female infertility andto study the effect of therapeutic procedures in achieving fertility. Patients with female infertility presenting to outpatient Department of Obstetrics and Gynecology were evaluated over a period of 18 months. Fifty consenting subjects excluding male factor infertility with normal hormonal profile and no contraindication to laparoscopy were subject to diagnostic laparoscopy and hysteroscopy. T-test. We studied 50 patients comprising of 24 (48%) cases of primary infertility and 26 (52%) patients of secondary infertility. The average age of active married life for 50 patients was between 8 and 9 years. In our study, the most commonly found pathologies were PCOD, endometroisis and tubal blockage. 11 (28.2) patients conceived after laparohysteroscopy followed by artificial reproductive techniques. This study demonstrates the benefit of laparohysteroscopy for diagnosis and as a therapeutic tool in patients with primary and secondary infertility. We were able to achieve a higher conception rate of 28.2%.

  14. Laparohysteroscopy in female infertility: A diagnostic cum therapeutic tool in Indian setting

    OpenAIRE

    Puri, Suman; Jain, Dinesh; Puri, Sandeep; Kaushal, Sandeep; Deol, Satjeet Kaur

    2015-01-01

    Aims: To evaluate the role of laparohysteroscopy in female infertility andto study the effect of therapeutic procedures in achieving fertility. Settings and Design: Patients with female infertility presenting to outpatient Department of Obstetrics and Gynecology were evaluated over a period of 18 months. Materials and Methods: Fifty consenting subjects excluding male factor infertility with normal hormonal profile and no contraindication to laparoscopy were subject to diagnostic laparoscopy a...

  15. Teste Albumasare cum Sibylla: astrology and the Sibyls in medieval Europe.

    Science.gov (United States)

    Smoller, Laura Ackerman

    2010-06-01

    In the 1480s Dominican humanist Filippo de' Barbieri published an illustration of a supposedly ancient female seer called the 'Sybilla Chimica', whose prophetic text repeated the words of the ninth-century astrologer Abu Ma'shar. In tracing the origins of Barbieri's astrological Sibyl, this article examines three sometimes interlocking traditions: the attribution of an ante-diluvian history to the science of the stars, the assertion of astrology's origins in divine revelation, and the belief in the ancient Sibyls' predictions of the birth of Christ and other Christian truths. Medieval authors from the twelfth century on began to cite these traditions together, thereby simultaneously authorizing the use of astrology to predict religious changes and blurring the categories of natural and supernatural as applied to human understanding. This blending of astrology and prophecy appears notably in works by such authors as John of Paris, John of Legnano, Johannes Lichtenberger, and Marsilio Ficino. Ultimately the trajectory that produced Barbieri's astrological Sibyl would lead to a wave of astrological apocalyptic predictions in the sixteenth and seventeenth centuries, as well as to the harnessing of astrology for the defense of the faith in the form of an astrological natural theology, sacralizing science as well as nature.

  16. A Domain Based Approach for the Animated Cum Automated Modelfor Deaf and Dumb Using NLP

    Directory of Open Access Journals (Sweden)

    T.F. Michael Raj

    2013-05-01

    Full Text Available Deaf and dumb people are using the hand gestures for their communication throughout the world. To understand and animate the hand gestures, we can help in facilitate communication between computers and the under privileged. In this study we propose a domain based approach which will be helpful to design a model using NLP This model will be useful for the learning of the recent trends in the technology. The proposed model processes the user input and converts into parameters which will produce the actions or gestures by the animated character which can be understandable by the deaf and dumb. The desired animations can be done by the software. The accuracy of the actions or animations based on the parameters of the actions that we extracted from the given information or the text by the users.

  17. Experimental study of an inexpensive solar collector cum storage system for agricultural uses

    Energy Technology Data Exchange (ETDEWEB)

    Garg, H.P.; Bhargave, A.K.; Mahajan, R.B.; Sharma, V.K.

    1984-01-01

    This paper presents an experimental investigation of an Augmented Integral Rock System. Experiments have been performed on such a solar air heater fabricated at the Institute. Experimental observations of fluid temperature, energy storage and other measures of system performance with variation of air mass flow rate, number of glazings and depth of rock bed are presented. The heat decay characteristics of the rock bed, while using a night insulation cover in addition to glass covers, are also reported in detail.

  18. Optimization of process parameters in CNC turning of aluminium alloy using hybrid RSM cum TLBO approach

    Science.gov (United States)

    Rudrapati, R.; Sahoo, P.; Bandyopadhyay, A.

    2016-09-01

    The main aim of the present work is to analyse the significance of turning parameters on surface roughness in computer numerically controlled (CNC) turning operation while machining of aluminium alloy material. Spindle speed, feed rate and depth of cut have been considered as machining parameters. Experimental runs have been conducted as per Box-Behnken design method. After experimentation, surface roughness is measured by using stylus profile meter. Factor effects have been studied through analysis of variance. Mathematical modelling has been done by response surface methodology, to made relationships between the input parameters and output response. Finally, process optimization has been made by teaching learning based optimization (TLBO) algorithm. Predicted turning condition has been validated through confirmatory experiment.

  19. Tracks in the Sand: Hooke's Pendulum "Cum Grano Salis"

    Science.gov (United States)

    Babovic, Vukota; Babovic, Miloš

    2014-01-01

    The history of science remembers more than just formal facts about scientific discoveries. These side stories are often inspiring. One of them, the story of an unfulfilled death wish of Jacob Bernoulli regarding spirals, inspired us to look around ourselves. And we saw natural spirals around us, which led to the creation of a Hooke's…

  20. Antibiotic delivery by liposomes from prokaryotic microorganisms: Similia cum similis works better.

    Science.gov (United States)

    Colzi, Ilaria; Troyan, Anna N; Perito, Brunella; Casalone, Enrico; Romoli, Riccardo; Pieraccini, Giuseppe; Škalko-Basnet, Nataša; Adessi, Alessandra; Rossi, Federico; Gonnelli, Cristina; Ristori, Sandra

    2015-08-01

    To date the effectiveness of antibiotics is undermined by microbial resistance, threatening public health worldwide. Enhancing the efficacy of the current antibiotic arsenal is an alternative strategy. The administration of antimicrobials encapsulated in nanocarriers, such as liposomes, is considered a viable option, though with some drawbacks related to limited affinity between conventional liposomes and bacterial membranes. Here we propose a novel "top-down" procedure to prepare unconventional liposomes from the membranes of prokaryotes (PD-liposomes). These vectors, being obtained from bacteria with limited growth requirements, also represent low-cost systems for scalable biotechnology production. In depth physico-chemical characterization, carried out with dynamic light scattering (DLS) and Small Angle X-ray Scattering (SAXS), indicated that PD-liposomes can be suitable for the employment as antibiotic vectors. Specifically, DLS showed that the mean diameter of loaded liposomes was ∼200-300nm, while SAXS showed that the structure was similar to conventional liposomes, thus allowing a direct comparison with more standard liposomal formulations. Compared to free penicillin G, PD-liposomes loaded with penicillin G showed minimal inhibitory concentrations against E. coli that were up to 16-times lower. Noteworthy, the extent of the bacterial growth inhibition was found to depend on the microorganisms from which liposomes were derived. Copyright © 2015 Elsevier B.V. All rights reserved.

  1. Cum se construiește profilul strategic al unei comunități

    Directory of Open Access Journals (Sweden)

    Călin Emilian HINȚEA

    2015-12-01

    Full Text Available The article presents a particular methodology of strategic planning: building a strategic profile of the community. This model is the result of years of research and applied planning in local communities and tries to help all interested parties to understand and use the strategy.

  2. Miks projektivõrgustikud projektmeeskondadele tuule alla teevad ? / Jonathan Cummings, Carol Pletscher

    Index Scriptorium Estoniae

    Cummings, Jonatahan

    2011-01-01

    Õige ja asjakohase oskusteabe leidmise keerukusest teadmistemahukate meeskonnaprojektide realiseerimisel. Projektvõrgustike analüüs. Skeemid: Mille poolest finaalijõudnud meeskonnad erinesid?, Kuidas projektvõrgustikud laiendavad meeskonna haaret?, Kuidas kasutada projektvõrgustikke?

  3. A noble additive cum compatibilizer for dispersion of nanoclay into ethylene octene elastomer

    CSIR Research Space (South Africa)

    Mondal, S

    2016-06-01

    Full Text Available montmorillonite (OMt) most of the properties further improved at a minimal loading of both OMt (0.5–1.0 mass%) and compatibilizer (1–2 mass%) owing to the establishment of a dominant intercalated structure. Although the die swell is slightly increased...

  4. Two—photon Nonlinear Jaynes—Cummings Model with Stark Shift

    Institute of Scientific and Technical Information of China (English)

    董传华; 卢俊

    2002-01-01

    Two-photon Jaynes-Cummimgs model is generalized to the case of Kerr medium in this paper,The field and atom are prepared initially in two-photon superposition state and ground state respectively.Nonlinear coefficient affects the dynamic behaviors of the field and atom.Evolutions of the squeezing for the operators of field and atom and the quantum inversion are discussed.In particular,the higher-order squeezing for atomic dipole and the effects of nonlinearity on it,which have not been studied by other authors,are investigated,Increasing the nonlinear coefficient will decrease the squeezing depth of atomic dipole.

  5. Miks projektivõrgustikud projektmeeskondadele tuule alla teevad ? / Jonathan Cummings, Carol Pletscher

    Index Scriptorium Estoniae

    Cummings, Jonatahan

    2011-01-01

    Õige ja asjakohase oskusteabe leidmise keerukusest teadmistemahukate meeskonnaprojektide realiseerimisel. Projektvõrgustike analüüs. Skeemid: Mille poolest finaalijõudnud meeskonnad erinesid?, Kuidas projektvõrgustikud laiendavad meeskonna haaret?, Kuidas kasutada projektvõrgustikke?

  6. Evaluation of Integrated Horticulture-Cum- Fish Farming in Malwa Region of Madhya Pradesh, India

    Directory of Open Access Journals (Sweden)

    Laxmi

    2015-08-01

    Full Text Available In India, the farming community accounts for 80% under marginal and small farmer’s category1. Farmers under these categories are economically poor working in diverse, risk prone environments and with hardly sufficient to sustain their family. The declining trend in land holding per capita poses a serious challenge to the sustainability and profitability of farming. Considering the efficacy of this viable production system, the study was conducted in purposively selected ponds of farmers which had available space of the pond bundh used for production of horticulture produce. The trial was conducted minimum 06 replications were taken under farm field condition. Vegetable growing in the trellis and dykes is an additional component which helps in maximizing profit from unit area. The data were collected from each treatment for consecutively 03 years to judge the economic profitability and sustainability of the practice. It was observed that better production and sustainable economic return can be achieved through integrated production technology or with dyke vegetable cultivation in pond based integrated farming practices.

  7. Tracks in the Sand: Hooke's Pendulum "Cum Grano Salis"

    Science.gov (United States)

    Babovic, Vukota; Babovic, Miloš

    2014-01-01

    The history of science remembers more than just formal facts about scientific discoveries. These side stories are often inspiring. One of them, the story of an unfulfilled death wish of Jacob Bernoulli regarding spirals, inspired us to look around ourselves. And we saw natural spirals around us, which led to the creation of a Hooke's…

  8. HYPERTROPHICALUM ADENOIDIS IN RE-LATIUM CUM SECRETUM OTTITIS IN MEDIAM

    Directory of Open Access Journals (Sweden)

    Lidija DUBROVSKA-MILETIC

    1999-11-01

    Full Text Available In this study we presented the treatment of 20 children with secretory otitis media (SOM. The treatment was surgical and it considened-ventilaton tube insertion and adenoidectomy in case of enlarged adenoid. In this clinical investigation was enroll 15 boys and 5 girls in age 5 to 10 were divided in two main groups:1. 9 children without enlarged adenoid2. 11 children with confirmed enlarged adenoidClinical material was analyzed according to hearing level, middle ear condition estimated by pure toneaudiiometry and tympanometry before and after the treatment. The result showed that adenoidectomy in combination with ventilation tube insertion facilitate secretory otitis media. That’s enable timely improving of hearing function us a important on development of speech, social, emotional and academic development in the early childhood.

  9. Atomic Dipole Squeezing in the Correlated Two-Mode Two-Photon Jaynes-Cummings Model

    Science.gov (United States)

    Dong, Zhengchao; Zhao, Yonglin

    1996-01-01

    In this paper, we study the atomic dipole squeezing in the correlated two-mode two-photon JC model with the field initially in the correlated two-mode SU(1,1) coherent state. The effects of detuning, field intensity and number difference between the two field modes are investigated through numerical calculation.

  10. Some entanglement features of three-atoms Tavis-Cummings model: Cooperative case

    CERN Document Server

    Youssef, M; Metwally, N

    2009-01-01

    In this paper we consider a system of identical three two-level atoms interacting at resonance with a single-mode of the quantized field in a lossless cavity. The initial cavity field is prepared in the coherent state while the atoms are taken initially to be either in the uppermost excited state "$|eee>$" or The $\\textmd{GHZ}$-state or the $\\textmd{W}$-state. For this system we investigate different kinds of atomic inversion and entanglement, which arise between the different parts of the system due to the interaction. Also the relationship, between entanglement and some other nonclassical effects in the statistical properties, such as collapses and revivals in the atomic inversion where superharmonic effects appear, is discussed. The $Q$-functions for different cases are discussed. Most remarkably it is found that the $\\textmd{GHZ}$-state is more robust against energy losses, showing almost coherent trapping and Schr\\"odinger-cat states can not be produced from such state. Also the entanglement of $\\textmd{...

  11. Flexible bacterial cellulose / permalloy nanocomposite xerogel sheets – Size scalable magnetic actuator-cum-electrical conductor

    Directory of Open Access Journals (Sweden)

    V. Thiruvengadam

    2017-03-01

    Full Text Available Permalloy nanoparticles containing bacterial cellulose hydrogel obtained after reduction was compressed into a xerogel flexible sheet by hot pressing at 60 ° C at different pressures. The permalloy nanoparticles with an ordered structure have a bimodal size distribution centered around 25 nm and 190 nm. The smaller nanoparticles are superparamagnetic while the larger particles are ferromagnetic at room temperature. The sheets have a room temperature magnetisation of 20 emug-1 and a coercivity of 32 Oe. The electrical conductivity of the flexible sheets increases with hot pressing pressure from 7 Scm-1 to 40 Scm-1 at room temperature.

  12. Scheme for directly measuring the Wigner characteristic function via the driven Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Zheng Shi-Biao

    2004-01-01

    A scheme is proposed for measuring the Wigner characteristic function of a cavity field. In the scheme an atom is sent through a slightly detuned cavity and driven by a strong resonant classical field. Then the population of the atom in the ground state directly yields the Wigner characteristic function of the cavity field.

  13. Very Weak Signals (VWS detected by stacking method according to different astronomical periodicities (HiCum

    Directory of Open Access Journals (Sweden)

    M. van Ruymbeke

    2007-11-01

    Full Text Available A stacking method to detect very weak signals is introduced in this paper. This method is to stack observed data in different well known periodicities according to the astronomical clock since majority geophysical observations are time based. We validated this method by applying it in four different cases. Interactions behind the observed parameters become obviously after it is stacked in two diurnal and semidiurnal tidal periodical waves. Amplitude and phase variations will be also measurable when a sliding windows stacking is used. This could be an important reference to find precursors before some earthquakes and volcanic events, corresponding to attenuations of medium patterns.

  14. Remo cum fratre Quirinus: Metamorphoses of the Roman Foundation Myth from its Beginnings to Horace

    Directory of Open Access Journals (Sweden)

    Špela Tomažinčič

    2008-07-01

    Full Text Available From the first reference to Romulus by Alcimus, a historian from the mid-fourth century BC, where the hero appears alone, down to the age of Augustus, the story of the foundation of Rome underwent considerable plot changes. The two most important are, firstly, Romulus' later role not merely as a conditor urbis, but – in keeping with the Hellenistic tradition of ktiseis poleon – mainly as a creator gentis and a model of the new Roman, who can subsequently embody a new ethnic identity; and, secondly, the later dichotomy of the founders. The interpretation of the Roman foundation myth must be therefore closely associated with the symbolism of numbers – one founder as opposed to twin founders – as it is reflected in different socio-political and historical contexts. In addition to shaping society, myth also documents all its changes. In the context of replacing a single founder with twin founders, Romulus and Remus, the first critical change is the introduction of Remus. The twin founders imply a double community, a notion which becomes meaningful in Rome only after the plebeian achievement of political equality between 367 and 342 BC. The second significant change is the death of Remus, involving the notion of a foundation sacrifice, for which the evidence points to the crisis of 296 BC. The foundation story also serves as an explanation model for the events in the Late Roman Republic. Horace's pessimistic Seventh Epode evokes the foundation crime of fratricide to explain the tragic pattern of civil wars. As Romulus' successors, the Romans are also heirs to his crime, to the scelus fraternae necis, from which they cannot escape. Moreover, Romulus as a creator gentis represents a potential source for the Roman change of identity, which was regarded as coincidental with the foundation act. This recurring theme is elaborated first in Ennius' Annals and later in Vergil's Aeneid and Horace's Third ‘Roman Ode’. The central motif is Ennius’ concilium deorum and its discussion of Romulus' apotheosis, which is opposed by Juno on account of his Trojan identity. Juno, the traditional mythological opponent of the Trojans, demands in exchange for Romulus' apotheosis a break with the old Trojan concept. This break is to be reflected in a new name for the city, which shall be named after its founder, chosen by the auspicium contest. The auspicium thus represents the divine election of the Trojans' legitimate successors, while Romulus' apotheosis symbolically fulfils the idea of a cosmic Roman empire predicted in Juno's Roman Ode speech. The two mythological exempla of Troy and Romulus serve as two opposing models, Troy being the eastern, un-Roman principle, and Romulus the embodiment of the Roman principle. In effect, they present the conflict of two different value systems, which is based on moral criteria and a negative characterisation of the eastern principle. These models are intended to guide the political, ideological and moral assessments of Augustan readers faced with watershed historical events. The contemporary allusions can hardly escape an attentive modern reader. The main characteristic that defines the Roman foundation story as a myth is precisely its sensitivity to social and political changes – a prerequisite for its transmission and continuity, as well as an indicator of its social relevance at different moments in history.

  15. Environmental conditions of some paddy cum prawn culture fields of Cochin backwaters, southwest coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, K.K.C.; Sankaranarayanan, V.N.; Gopalakrishnan, T.C.; Balasubramanian, T.; Devi, C.B.L.; Aravindakshan, P.N.; Kutty, M.K.

    Temperature, salinity, pH, dissolved oxygen, inorganic phosphate, ammonia, nitrate and nitrite of seasonal and perennial prawn culture fields from 3 areas of Cochin backwaters are studied. Area 1 is a region least affected ecologically...

  16. Phytoplankton and zooplankton of some paddy-cum-prawn culture fields in and around Cochin

    Digital Repository Service at National Institute of Oceanography (India)

    Gopalakrishnan, T.C.; Devi, C.B.L.; Aravindakshan, P.N.; Nair, K.K.C.; Balasubramanian, T.; Kutty, M.K.

    . )The study also indicates that the cause for the variations in the tertiary production, especially of prawns in the different regions cannot be ascribed to excess nutrient concentrations either directly or by affecting primary and secondary production....

  17. The Tradition of Ancient Logic-cum-Grammar in the Middle Ages - What's the Problem?

    DEFF Research Database (Denmark)

    Ebbesen, Sten

    2007-01-01

    Middelalderlig grammatik og logik udvikledes i frugtbar spænding mellem arvet stof af stoisk og peripatetisk oprindelse, mens neoplatonismen stort set er ligegyldig i netop denne sammenhæng. Der slås til lyd for ved siden af de traditionelle antikke skoler at regne med en "hellenistisk standardlæ...

  18. Study on a waste heat-driven adsorption cooling cum desalination cycle

    KAUST Repository

    Ng, Kim Choon

    2012-05-01

    This article presents the performance analysis of a waste heat-driven adsorption cycle. With the implementation of adsorption-desorption phenomena, the cycle simultaneously produces cooling energy and high-grade potable water. A mathematical model is developed using isotherm characteristics of the adsorbent/adsorbate pair (silica gel and water), energy and mass balances for the each component of the cycle. The cycle is analyzed using key performance parameters namely (i) specific cooling power (SCP), (ii) specific daily water production (SDWP), (iii) the coefficient of performance (COP) and (iv) the overall conversion ratio (OCR). The numerical results of the adsorption cycle are validated using experimental data. The parametric analysis using different hot and chilled water temperatures are reported. At 85°C hot water inlet temperature, the cycle generates 3.6 m 3 of potable water and 23 Rton of cooling at the produced chilled water temperature of 10°C. © 2012 Elsevier Ltd and IIR. All rights reserved.

  19. Modul cum reflectă clasificarea bibliografică societatea - cazul sistemului suedez SAB

    Directory of Open Access Journals (Sweden)

    Joacim Hansson

    2006-01-01

    Full Text Available Articolul prezintă un studiu al sistemului de clasificare suedez, sistemul SAB, şi a capacităţii sale de a ilustra anumite structuri sociale şi ideologice în societatea suedeză la începutul secolului al XX-lea. Metodologia se bazează pe hermeneutica critică şi analiza ideologică. Rezultatele arată că sistemul de clasificare prezintă corespondenţe semnificative între structura ierarhiilor sale disciplinare şi idealuri din societatea înconjurătoare.

  20. The Assessment of Empathy in Adolescence: A Contribution to the Italian Validation of the "Basic Empathy Scale"

    Science.gov (United States)

    Albiero, Paolo; Matricardi, Giada; Speltri, Daniela; Toso, Diana

    2009-01-01

    The present study examined the validity of the Basic Empathy Scale (BES) [Jolliffe, D., & Farrington, D. P. (2006a). Development and validation of the Basic Empathy Scale. "Journal of Adolescence," 29, 589-611; Jolliffe, D., & Farrington, D. P. (2006b). Examining the relationship between low empathy and bullying. "Aggressive Behavior," 32(6),…

  1. An Investigation into Occasional White Spot Syndrome Virus Outbreak in Traditional Paddy Cum Prawn Fields in India

    Directory of Open Access Journals (Sweden)

    Deborah Gnana Selvam

    2012-01-01

    Full Text Available A yearlong (September 2009–August 2010 study was undertaken to find out possible reasons for occasional occurrence of White Spot Syndrome Virus (WSSV outbreak in the traditional prawn farms adjoining Cochin backwaters. Physicochemical and bacteriological parameters of water and sediment from feeder canal and four shrimp farms were monitored on a fortnightly basis. The physicochemical parameters showed variation during the two production cycles and between the farms studied. Dissolved oxygen (DO content of water from feeder canal showed low oxygen levels (as low as 0.8 mg/L throughout the study period. There was no disease outbreak in the perennial ponds. Poor water exchange coupled with nutrient loading from adjacent houses resulted in phytoplankton bloom in shallow seasonal ponds which led to hypoxic conditions in early morning and supersaturation of DO in the afternoon besides considerably high alkaline pH. Ammonia levels were found to be very high in these ponds. WSSV outbreak was encountered twice during the study leading to mass mortalities in the seasonal ponds. The hypoxia and high ammonia content in water and abrupt fluctuations in temperature, salinity and pH might lead to considerable stress in the shrimps triggering WSSV infection in these traditional ponds.

  2. Low-voltage Organic Thin Film Transistors (OTFTs) with Solution-processed High-k Dielectric cum Interface Engineering

    Science.gov (United States)

    Su, Yaorong

    Although impressive progress has been made in improving the performance of organic thin film transistors (OTFTs), the high operation voltage resulting from the low gate areal capacitance of traditional SiO 2 remains a severe limitation that hinders OTFTs' development in practical applications. In this regard, developing new materials with high- k characteristics at low cost is of great scientific and technological importance in the area of both academia and industry. In this thesis, we first describe a simple solution-based method to fabricate a high-k bilayer Al2Oy/TiOx (ATO) dielectric system at low temperature. Then the dielectric properties of the ATO are characterized and discussed in detail. Furthermore, by employing the high-k ATO as gate dielectric, low-voltage copper phthalocyanine (CuPc) based OTFTs are successfully developed. Interestingly, the obtained low-voltage CuPc TFT exhibits outstanding electrical performance, which is even higher than the device fabricated on traditional low-k SiO2. The above results seem to be contradictory to the reported results due to the fact that high-k usually shows adverse effect on the device performance. This abnormal phenomenon is then studied in detail. Characterization on the initial growth shows that the CuPc molecules assemble in a "rod-like" nano crystal with interconnected network on ATO, which probably promotes the charge carrier transport, whereas, they form isolated small islands with amorphous structure on SiO2. In addition, a better metal/organic contact is observed on ATO, which benefits the charge carrier injection. Our studies suggest that the low-temperature, solution-processed high-k ATO is a promising candidate for fabrication of high-performance, low-voltage OTFTs. Furthermore, it is well known that the properties of the dielectric/semiconductor and electrode/semiconductor interfaces are crucial in controlling the electrical properties of OTFTs. Hence, investigation the effects of interfaces engineering on improving the electrical characteristics of OTFTs is of great technological importance. For the dielectric/semiconductor interface, an octadecylphosphonic acid (ODPA) self-assembled monolayer (SAM) is used to modify the surface of ATO (ODPA/ATO). For the electrode/semiconductor interface, a simple in-situ modified Cu (M-Cu) is employed as source-drain (S/D) electrodes in stead of commonly used Au. The electrical characteristics of pentacene TFT are drastically enhanced upon interfaces modification. Moreover, by encapsulating the M-Cu with a thin layer of Au (Au/ M-Cu), the device performance is further improved. The detailed mechanism is systematically explored. Finally, organic electronic devices on flexible plastic substrates have attracted much attention due to their low-cost, rollability, large-area processability, and so on. One of the most critical issues in realization flexible OTFTs is the integration of gate dielectrics with flexible substrates. We have successfully incorporated the ODPA/ATO with Au coated flexible polyimide (PI) substrate. By using Au/M-Cu as S/D electrode, the flexible pentacene TFTs show outstanding electrical performance. In addition, the mechanical flexibility and reliability of the devices are studied in detail. Our approach demonstrates an effective way to realize low-cost, high-performance flexible OTFTs.

  3. Eco-friendly and facile integrated biological-cum-photo assisted electrooxidation process for degradation of textile wastewater.

    Science.gov (United States)

    Aravind, Priyadharshini; Subramanyan, Vasudevan; Ferro, Sergio; Gopalakrishnan, Rajagopal

    2016-04-15

    The present article reports an integrated treatment method viz biodegradation followed by photo-assisted electrooxidation, as a new approach, for the abatement of textile wastewater. In the first stage of the integrated treatment scheme, the chemical oxygen demand (COD) of the real textile effluent was reduced by a biodegradation process using hydrogels of cellulose-degrading Bacillus cereus. The bio-treated effluent was then subjected to the second stage of the integrated scheme viz indirect electrooxidation (InDEO) as well as photo-assisted indirect electro oxidation (P-InDEO) process using Ti/IrO2-RuO2-TiO2 and Ti as electrodes and applying a current density of 20 mA cm(-2). The influence of cellulose in InDEO has been reported here, for the first time. UV-Visible light of 280-800 nm has been irradiated toward the anode/electrolyte interface in P-InDEO. The effectiveness of this combined treatment process in textile effluent degradation has been probed by chemical oxygen demand (COD) measurements and (1)H - nuclear magnetic resonance spectroscopy (NMR). The obtained results indicate that the biological treatment allows obtaining a 93% of cellulose degradation and 47% of COD removal, increasing the efficiency of the subsequent InDEO by a 33%. In silico molecular docking analysis ascertained that cellulose fibers affect the InDEO process by interacting with the dyes that are responsible of the COD. On the other hand, P-InDEO resulted in both 95% of decolorization and 68% of COD removal, as a result of radical mediators. Free radicals generated during P-InDEO were characterized as oxychloride (OCl) by electron paramagnetic resonance spectroscopy (EPR). This form of coupled approach is especially suggested for the treatment of textile wastewater containing cellulose.

  4. Diversidad de enterobacterias asociadas a frutos de tomate (Lycopersi-cum sculentum Mill y suelos de invernadero

    Directory of Open Access Journals (Sweden)

    M. Lorena Luna-Guevara

    2012-01-01

    Full Text Available El objetivo de este trabajo fue determinar la diversidad de enterobacterias presentes en suelo y tomates provenientes de tres invernaderos de fertirrigación. Estos sistemas de cultivo son una alternativa importante de producción en agricultura protegida, sin embargo, existe escasa información acerca de la calidad microbiológica de los frutos y su relación con las características químicas del suelo. Las evaluaciones del suelo consistieron en analizar el contenido de materia orgánica y pH. En los análisis microbiológicos se aislaron e identificaron enterobacterias en muestras compuestas de suelo y frutos con diferentes grados de madurez (0, 50 y 100%, utilizando medios de cultivo selectivos, diferenciales y pruebas confirmatorias con el sistema VITEK. Los patogrupos de Escherichia coli enteropatogena (EPEC y enterotoxigénica (ETEC se caracterizaron genotípicamente mediante la técnica de reacción en cadena de la polimerasa (PCR, amplificándose los genes bfpA y lngA. Con las especies identificadas se calcularon los índices de diversidad Simpson (D y Shannon-Wiener (H´ y estimador de Chao (SChao1. Las especies Enterobacter cloacae, Citrobacter freundii y C. brakii presentaron mayor frecuencia de aislamiento, EPEC y ETEC fueron identificadas en muestras de suelo y en frutos con 100% de madurez. En suelo, los porcentajes de materia orgánica se correlacionaron positivamente con los índices H´. En fruto, aunque H´ y D reflejaron comunidades bacterianas menos diversas, el aislamiento de ETEC y Shigella boydii sobre la superficie del fruto comprometen su inocuidad debido a que habitualmente se consume en forma cruda.

  5. Improvement in the adsorption properties of semicoke from the power-cum-technological processing of kansk-achinsk brown coal

    Energy Technology Data Exchange (ETDEWEB)

    Koz' min, G.V.; Mozhaeva, V.I.; Kim, S.T.; Kalyuzhnyi, V.V.; Nikolaeva, V.A.

    1981-01-01

    In the reported experiments, a study has been performed on the progressive activation of the semicoke of Irsha-Borodino coal at burn-offs from 11 to 48%, and experimental samples of carbonaceous adsorbents have been obtained. The parameters of the porous structure of the samples obtained have been studied and it has been shown that with an increase in the degree of burn-off of the semicoke the total volume of micropores and mesopores rises from 135*10/sup -6/ to 779*10/sup -6/ m/sup 3//kg. The increase in the total volume of the pores takes place mainly through the volume of the mesopores. 4 refs.

  6. Entropy squeezing for a two—level atom in the Jaynes—Cummings model with an intensity—depend coupling

    Institute of Scientific and Technical Information of China (English)

    李春先; 方卯发; 等

    2003-01-01

    We study the squeezing for a two-level atom in the Jaynes-Cumings model with intensity-dependent coupling using quantum information entropy,and examine the influences of the initial state of the system on the squeezed component number and direction of the information entropy squeezing.Our results show that,the squeezed component number depends on the atomic initial distribution angle,while the squeezed direction is determined by both the phases of the atom and the field for the information entropy squeezing.Quantum information entropy is shown to be a remarkable precision measure for atomic squeezing.

  7. Properties of field quantum entropy evolution in the Jaynes-Cummings model with initial squeezed coherent states field

    Institute of Scientific and Technical Information of China (English)

    Liu Wang-Yun; An Yu-Ying; Yang Zhi-Yong

    2007-01-01

    The properties of the field quantum entropy evolution in a system of a single-mode squeezed coherent state field interacting with a two-level atom is studied by utilizing the complete quantum theory, and we focus our attention on the discussion of the influences of field squeezing parameter γ, atomic distribution angle θ and coupling strength g between the field and the atom on the properties of the evolution of field quantum entropy. The results obtained from numerical calculation indicate that the amplitude of oscillation of field quantum entropy evolution decreases with the increasing of squeezing parameter γ, and that both atomic distribution angle θ and coupling strength g between the field and the atom can influence the periodicity of field quantum entropy evolution.

  8. Evolution of field entropy and entanglement in the intensity-dependent two-mode Jaynes-Cummings model

    Institute of Scientific and Technical Information of China (English)

    Gao Yun-Feng; Feng Jian; Wang Ji-Suo

    2005-01-01

    The evolution of the entanglement degree of two-mode fields and atom with the intensity-dependent coupling is investigated using von Neumann entropy. The results for the initial fields in both coherent states and two-mode squeezed vacuum state are calculated. The influence of the field.intensity on the entropy is discussed. It is found that the field and atom are generally in maximum entanglement but subject to periodic pulsed disentanglement completely under the condition of strong initial field.

  9. Tavis-Cummings模型中原子的纠缠度%Entanglement of atoms in Tavis-Cummings model

    Institute of Scientific and Technical Information of China (English)

    董传华; 张亚利

    2006-01-01

    Entanglement is used to measure correlation between separated subsystems. yon Neumann entropy is used to study evolutions of entanglement of atoms in processes of interaction between atoms with the field prepared in coherent state. The effects of field intensity and detuning on entanglement are investigated. It is shown that the entanglement exhibited oscillations in its evolutions, their amplitudes and mean values decrease with increasing field intensity. Oscillation frequencies increase with detuning, but the maximum values are almost independent of detuning.

  10. Cum descriu oamenii experienta schimbarii locului de munca din mediul public in cel privat? O analiza interpretativ fenomenologica

    Directory of Open Access Journals (Sweden)

    Mateiana, Roxana

    2012-12-01

    Full Text Available The current research aims to present a detailed idiographic analysis regarding the experience of changing jobs from public service to private sector. The study was conducted on a sample consisting of five participants, ages between 24 and 46 years old. Each participant was interviewed based on semi-structured interviews and their transcripts were further analyzed using the interpretative phenomenological analysis. This specific method implied analyzing the experiential responses and their respective meanings line by line, retaining the first impressions followed by identifying the emergent topics from the experiential material, with focus on similarities and discrepancies within each case, as well as between all cases. Five themes emerged from the experiential material provided by the participants: the job characteristics in the public sector, the causes that lead to changing the workplace, the job characteristics in the private sector, barriers in adapting to the new work settings, changes regarding the relationship work – family life. Based on the “verbatim” content obtained, there could be outlined a certain “portrait” of the public sector as a product of a specific cultural, economic, social and even political environment, presented mainly as opposed to the private sector. The propensity to the “family” type work group, the institutional disorganization, the chaos represented by the bureaucracy, the lack of motivation and the routine are among the issues that matter, but „lack” to the participants in the new workplace. We consider that this kind of approach provides new insights regarding the experience of changing the workplace from public to private sector, based on first-hand information from people who went trough the experience.

  11. Tenuitas cum bona fama : éthique et architecture dans le De architectura de Vitruve

    Directory of Open Access Journals (Sweden)

    Mireille Courrént

    2011-05-01

    Full Text Available La question du rôle de l’éthique dans la pratique de l’architecte fait, depuis quelques années, l’objet de nombreux débats, techniques, politiques et sociaux, nés à la fois de la place dévolue à l’architecte dans le processus de mise en forme de l’espace urbain et de la complexification constante de ses relations avec les commanditaires. Ces débats reposent sur trois notions fondamentales, incessamment convoquées : la déontologie, la responsabilité et l’esthétique. Par leur ancrage dans la co...

  12. VizieR Online Data Catalog: H through Ni intensities in LISM from Voyager 1 (Cummings+, 2016)

    Science.gov (United States)

    Cummings, A. C.; Stone, E. C.; Heikkila, B. C.; Lal, N.; Webber, W. R.; Johannesson, G.; Moskalenko, I. V.; Orlando, E.; Porter, T. A.

    2017-01-01

    Since 2012 August Voyager 1 has been observing the local interstellar energy spectra of Galactic cosmic-ray nuclei down to 3MeV/nuc and electrons down to 2.7MeV. The H and He spectra have the same energy dependence between 3 and 346MeV/nuc, with a broad maximum in the 10-50MeV/nuc range and a H/He ratio of 12.2+/-0.9. The peak H intensity is ~15 times that observed at 1AU, and the observed local interstellar gradient of 3-346MeV H is -0.009+/-0.055%/AU, consistent with models having no local interstellar gradient. The energy spectrum of electrons (e-+e+) with 2.7-74MeV is consistent with E-1.30+/-0.05 and exceeds the H intensity at energies below ~50MeV. Propagation model fits to the observed spectra indicate that the energy density of cosmic-ray nuclei with >3MeV/nuc and electrons with >3MeV is 0.83-1.02eV/cm3 and the ionization rate of atomic H is in the range of 1.51-1.64x10-17s-1. This rate is a factor >10 lower than the ionization rate in diffuse interstellar clouds, suggesting significant spatial inhomogeneity in low-energy cosmic rays or the presence of a suprathermal tail on the energy spectrum at much lower energies. The propagation model fits also provide improved estimates of the elemental abundances in the source of Galactic cosmic rays. (4 data files).

  13. "Fratres, omni die videtis cum vadit istud regnum in perdicionem": Abbo of Saint-Germain and the Crisis of 888

    OpenAIRE

    Charles West

    2016-01-01

    Historians often consider the year 888 to have marked the effective end of the Carolingian empire established by Charlemagne. This paper explores the issue from the perspective of a contemporary author, the monk Abbo of Saint-Germain des Prés. Abbo is today best known for his poem about the Viking sieges of Paris, but he later also compiled a fascinating and rather overlooked set of sermons. Taken together, these texts offer an insight into contemporary responses to the “crisis” that followed...

  14. Approximate Teleportation of an Unknown Atomic-Entangled State with Dissipative Atom-Cavity Resonant Jaynes-Cummings Model

    Institute of Scientific and Technical Information of China (English)

    LIU Zong-Liang; LI Shao-Hua; CHEN Chang-Yong

    2008-01-01

    We propose a scheme for approximately and conditionally teleporting an unknown atomic-entangled state in dissipative cavity QED.It is the further development of the scheme of [Phys.Rev.A 69 (2004) 064302],where the cavity mode decay has not been considered and the state teleportated is an unknown atomic state.In this paper,we investigate the influence of the decay on the approximate and conditional teleportation of the unknown atomic-entangled state,which is different from that teleportated in [Phys.Rev.A 69 (2004) 064302] and then give the fidelity of the teleportation,which depends on the cavity mode decay.The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state by means of a single atom but also the teleportation of the unknown trapped-ion-entangled-state in a linear ion trap.

  15. Physiological and Growth Characteristics of Shewanella Species

    Science.gov (United States)

    2016-05-01

    282–287. 29. Dawood B. 1998. Corrosion-enhancing potential of Shewanella putrefaciens isolated from industrial cooling waters. J Appl Microbiol. 84...AFCEC-CX-TY-TR-2016-0016 PHYSIOLOGICAL AND GROWTH CHARACTERISTICS OF SHEWANELLA SPECIES Karen Farrington, D. Matthew Eby, Susan Sizemore...Technical Report 01 March 2012 - 01 March 2014 Physiological and growth characteristics of Shewanella species FA4819-11-C-0003 Karen Farrington (1

  16. Külaskäik Kimbelli kunstimuuseumisse = A Visit to the Kimbell Art Museum / Patricia Cummings Loud ; tõlk. Ingrid Ruudi

    Index Scriptorium Estoniae

    Loud, Patricia Cummings

    2007-01-01

    Kimbelli kunstimuuseumi arhitektuurikuraator Patricia C. Loud Lous I. Kahni projekteeritud Kimbelli kunstimuuseumist Fort Worthis Texases (ehitatud 1966-1972), muuseumi külastajatest. Maastikuarhitekt George Patton. 1998. a. tunnustas Ameerika Arhitektuuriinstituut Kimbelli muuseumihoonet Kahekümne Viie Aasta auhinnaga, nimetatud sama auhinna saanud teised neli L. I. Kahni projekteeritud hoonet. Ill. lõige, sisevaade, värv. välisvaade

  17. Külaskäik Kimbelli kunstimuuseumisse = A Visit to the Kimbell Art Museum / Patricia Cummings Loud ; tõlk. Ingrid Ruudi

    Index Scriptorium Estoniae

    Loud, Patricia Cummings

    2007-01-01

    Kimbelli kunstimuuseumi arhitektuurikuraator Patricia C. Loud Lous I. Kahni projekteeritud Kimbelli kunstimuuseumist Fort Worthis Texases (ehitatud 1966-1972), muuseumi külastajatest. Maastikuarhitekt George Patton. 1998. a. tunnustas Ameerika Arhitektuuriinstituut Kimbelli muuseumihoonet Kahekümne Viie Aasta auhinnaga, nimetatud sama auhinna saanud teised neli L. I. Kahni projekteeritud hoonet. Ill. lõige, sisevaade, värv. välisvaade

  18. ASİDİK YAGIŞLARIN TRİTİCUM VULGARE ( BUGDAY ve ZEA • • • • • MA YS SACCHARA TA (MISIR BITKILERINE ETKILERI

    Directory of Open Access Journals (Sweden)

    NEVİN YALÇIN

    1999-12-01

    Full Text Available Bu çalışmada, asidik yağışların Triticum Vulgare (Buğday ve Zea Mays Saccbarata ( Mısır bitkile rine et ki leri incel enmiştir. Bu a1naçla, 24 adet 20x20x30 cn1 boyutundaki teneke saksı lara ekilen tohumlar pH 1 � 2, 3, 4. 5, 6 olan HN03 ve H2S04 ç özel til e ri ile bir ay bo yunc a sulanmışlar dır.T. Vulgar e ve Z.M. Saccharata yap r a k lar ı n d a k loroz i s (sa r arma ve flecking (benekleşme görülmüştür.Büyüme, 15. g ünde n sonra durınuştur. pH s ı düşük olan çö zel t i l er ile sulanan bitkilerde boyca enge llennıe görülmüş, çürüme daha önce b aş ! an1ış tı r . Ayrıca as i di k çöz elti lerl e sulamanın tohum çim l e n m es i ni gec i ktirdi ğ i gözlenıniştir. Biyomas değ e r lerinde de k ayıpla r kaydedilıniştir. Düşük pH derecelerinde ka yıp l arı n daha fazla olduğu b eli r le nnı i ş t ir. Her iki bit k inin kök ve gövdelerinin anatemisinde bir bozulına görülmeıniştir. ABSTRACT In this study, the effects of acid rains on Triticum Vu l g a re (\\Vheat and Zea Mays Saccharata (Com were investigated. For this purpose, seeds were sowed to 24 tin pots at diı n ensions of 20x20x30 cm and they were vvatered with HN03 and H2S04 solutions which to be pH L 2, 3, 4, 5, 6 for o ne month. T.Vulgare and Z.M. Saccharata leavcs showed chlorosis and flecking. The growing stopped after 15 days. At solutions with low pH, p I ant l e ngt h s w ere n1easured shorter and rotting w as begun earlier than otlıers. It also inhibited seed gennination by de lay ing the same. The bi o mass values alsa s h owe d a loss and this was the h i g hest at the low pH degree s . The root and stern defo rmat i ons in each the two s p c ci es were not seemed . I. GİRİŞ Atmosferin kirl errmesi sonucu rneydana gelen asit yağmurlar1 veya asit ç ö k e J n 1 es i sanayinin, termik santr allerin , ulaşun araçlan n ın ve fosil yakıtların yaydığı SOx , kükürt oksit ve NOx , azot oksit gazlar ı ndan kaynaklanmaktadır. Havada bul u nan metal l er ve k a rb on; kükürt oksi tleri ni sülfat iyonuna ' so4'- , a zot oks itl erini nitrat iyonuna , N03- . oksitleınektedir. Meydana gelen bu iyonlar, atmo sfe rdeki H katyon u ile bi rleşerek H2S04 ve HN03 asıtlerini olu ş t ururlar [ 1, 2]. SO� ve NOx gazlarının asitlere dönüşerek bulutlardaki su daınlacıklarında ve yağmur dam lalarında adsorbe edilmeleri ile asit yağınuru oluşu r . Buna yaş ç ö k e l ı n e (w et depositian denilmektedir [3 j. Aınerika Birleşik Devletlerinin doğu kesiminde y a ş çö kel m e n in y akla ş ık % 65 i nin H2S04, % 30 unun HN03 ve geri kalanının diğer asit lerden oluştuğu belirlenıniştir [ 4. A d ap azı rı

  19. Population Dynamics and Emission Spectrum of a Cascade Three-Level Jaynes-Cummings Model with Intensity-Dependent Coupling in a Kerr-like Medium

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    By using the method of eigenvectors, the atomic populations and emission spectrum are investigated in a system that consists of a cascade three-level atom resonantly interacting with a single-mode field in a Kerr-like medium.The atom and the field are assumed to be initially in the upper atomic state and the Fock state, respectively. Results for models with intensity-dependent coupling and with intensity-independent coupling are compared. It is found that both population dynamics and emission spectrum show no indications of atom-field decoupling in the strong field limit if the intensity-dependent coupling is taken into account.

  20. Phytochemical investigation of Crataegi folium cum flos (hawthorn leaves and flowers and Hyperici herba (st johns wort aerial parts hydroalcoholic extracts

    Directory of Open Access Journals (Sweden)

    Ruxandra Cretu

    2011-12-01

    Full Text Available Hawthorn (Crataegus monogyna hydroalcoholic extract was prepared by extraction of powdered dried leaves and flowers with ethanol 70% v/v (1:10, by reflux for two hours. St Johns Wort (Hypericum perforatum hydroalcoholic extract was prepared by extraction of powdered dried flowering aerial parts with ethanol 70% v/v (1:10, by reflux for two hours. Both extracts were qualitative and quantitative analyzed. The qualitative analysis consisted in phytochemical screening and spectroanalytical profile by HPTLC and UV/VIS absorption spectroscopy. Quantitative analyses consisted in determination of total flavonoid content (as rutin by following colorimetric aluminum chloride method, and total polyphenol content (as gallic acid by Folin- Ciocalteu method. Results were evaluated statistically and presented as mean of three determinations ± SD (standard deviation. These analyses revealed their complex composition and either some similarities and differences between these two extracts.

  1. Aspects of the competition between atom-field and field-environment couplings under the influence of an external source in dispersive Jaynes-Cummings model

    CERN Document Server

    De Faria, J G P

    2002-01-01

    We give a fully description of the dynamics of an atom dispersively coupled to a field mode in a dissipative environment fed by an external source. The competition between the unitary atom-field (which leads to entanglement) and the dissipative field-environment couplings are investigated in detail. We find the time evolution of the global atom-field system for any initial state and we show that atom-field steady state is at most classically correlated. For an initial state chosen, we evaluate the purity loss of the global system and of atomic and field subsystems as a function of time. We find that the source will tend to compensate for the dissipation of the field intensity and to accelerate decoherence of the global and atomic states. Moreover, we show that the degree of entanglement of the atom-field state, for the particular initial state chosen, can be completely quantified by concurrence. Analytical expression for time evolution of the concurrence is given.

  2. Theoria cum praxi: la vuelta a la complejidad (Apuntes para una filosofía práctica desde el perspectivismo leibniziano

    Directory of Open Access Journals (Sweden)

    Roldán, Concha

    1997-11-01

    Full Text Available Not available

    Este trabajo trata de elaborar una hipótesis sobre el papel de Leibniz en la formación de las grandes categorías de la filosofía práctica moderna, poniendo de relieve una idea de racionalidad «hermenéutica» o «imperfecta» que, partiendo del concepto leibniziano de perspectivismo, constaría de tres grandes vertientes que aquí se denominan (de acuerdo con el espíritu de la metodología de Leibniz «principios»: de contingencia, autonomía y tolerancia. Lo que a Leibniz le interesa es asegurar una libertad autodeterminista de cuño rigurosamente moderno, subrayando que el universo de la praxis humana está presidido por el [actum de lo contingente o de «aquello que puede ser de otra manera». Desde su concepto de individuación no se enfatiza la autonomía racional de un yo desencarnado ni mucho menos de un «autómata previsible», sino la consciencia de una subjetividad autodiferenciada que se propone a sí misma hipótesis viables para salvar la coherencia de sus acciones. El espíritu de tolerancia constituye la conclusión ética de las dos premisas anteriores: la idea general de justicia sólo es asequible desde el peculiar punto de vista de la place d'autruy, que viene a constituir el fundamento de aquélla

  3. Two-Photon Nonlinear Jaynes-Cummings Model with Stark Shift%具有Stark位移的非线性双光子Jaynes-Cummings模型

    Institute of Scientific and Technical Information of China (English)

    董传华; 卢俊

    2002-01-01

    Two-photon Jaynes-Cummimgs model is generalized to the case of Kerr medium in this paper. The field and atom are prepared initially in two-photon superposition state and ground state respectively. Nonlinear coefficient affects the dynamic behaviors of the field and atom. Evolutions of the squeezing for the operators of field and atom and the quantum inversion are discussed. In particular, the higher-order squeezing for atomic dipole and the effects of nonlinearity on it, which have not been studied by other authors,are investigated. Increasing the nonlinear coefficient will decrease the squeezing depth of atomic dipole.

  4. Synthesis, crystal structure and electrical properties of the tetrahedral quaternary chalcogenides CuM2InTe4 (M=Zn, Cd)

    Science.gov (United States)

    Nolas, George S.; Hassan, M. Shafiq; Dong, Yongkwan; Martin, Joshua

    2016-10-01

    Quaternary chalcogenides form a large class of materials that continue to be of interest for energy-related applications. Certain compositions have recently been identified as possessing good thermoelectric properties however these materials typically have the kesterite structure type with limited variation in composition. In this study we report on the structural, optical and electrical properties of the quaternary chalcogenides CuZn2InTe4 and CuCd2InTe4 which crystallize in the modified zinc-blende crystal structure, and compare their properties with that of CuZn2InSe4. These p-type semiconductors have direct band gaps of about 1 eV resulting in relatively high Seebeck coefficient and resistivity values. This work expands on the research into quaternary chalcogenides with new compositions and structure types in order to further the fundamental investigation of multinary chalcogenides for potential thermoelectrics applications.

  5. «Fratres, omni die videtis cum vadit istud regnum in perdicionem»: Abbo of Saint-Germain and the Crisis of 888

    Directory of Open Access Journals (Sweden)

    Charles West

    2016-09-01

    Full Text Available Historians often consider the year 888 to have marked the effective end of the Carolingian empire established by Charlemagne. This paper explores the issue from the perspective of a contemporary author, the monk Abbo of Saint-Germain des Prés. Abbo is today best known for his poem about the Viking sieges of Paris, but he later also compiled a fascinating and rather overlooked set of sermons. Taken together, these texts offer an insight into contemporary responses to the “crisis” that followed the deposition and death of Emperor Charles the Fat.

  6. Disturbance of hippocampal H2S generation contributes to CUMS-induced depression-like behavior: involvement in endoplasmic reticulum stress of hippocampus

    National Research Council Canada - National Science Library

    Huiying Tan Wei Zou Jiamei Jiang Ying Tian Zhifang Xiao Lili Bi Haiying Zeng Xiaoqing Tang

    2015-01-01

    .... Excessive and prolonged endoplasmic reticulum (ER) stress triggers cell death. Hydrogen sulfide (H2S), the third endogenous signaling gasotransmitter, plays an import- ant role in brain functions as a neuromodulator and a neuroprotectant...

  7. Collapse revival behaviour of the entanglement between V-type three-level atoms and two-mode photons in nonlinear Jaynes–Cummings model

    Indian Academy of Sciences (India)

    M Mohjoei; M M Golshan; H Safari

    2013-05-01

    In this paper the time evolution of von Neumann entropy, as a measure of entanglement between V-type three-level atoms and the union of a two-mode field, is studied. The atom–field interaction is assumed to occur in a Kerr-type medium with an intensity-dependent coupling. Introducing a Casmir operator whose eigenvalues, , give total excitations in the system and commutes with the governing Hamiltonian, it is concluded that the latter is block-diagonal with ever growing dimensions. As we shall show, however, each block consists of two 2 × 2 blocks while all the others, ( −1) in number, are 3 × 3. We then proceed to analytically calculate the time-evolution operator which is also block-diagonal, each block with the same properties as that of the Hamiltonian. Our calculations show that, as expected, the atom–field entanglement oscillates which, depending upon the initial state, exhibits the phenomenon of collapse revivals. It is further shown that collapse revivals occur whenever both 2 × 2 blocks are involved in the time evolution of the system. Properties of such behaviour in the entanglement are also discussed in detail.

  8. EXIGENŢE ALE STATULUI DE DREPT AŞA CUM REIES DIN CONSTITUŢIILE UNOR STATE MEMBRE ALE UNIUNII EUROPENE

    Directory of Open Access Journals (Sweden)

    Crina Mihaela Verga

    2006-05-01

    Full Text Available Fondée en Allemagne à la fin de XIX e siècle sur les idées de Kant concernant “la société civile”, société dans laquelle on assure les droits naturels de l’individu, l’idée de l’Ētat de droit est reprise après la deuxième guerre mondiale, inscrite dans certaines constitutions et transformée en un critérium fondamental de la démocratie dans les documents internationales. La recherche énonce et analyse les exigences qui s’imposent pour pouvoir parler de l’existence de l’Ētat de droit, telles comme elles résultent tant des dispositions constitutionnelles de quelques Etats de l’Union Européenne que de leur pratique politique. Il est nécessaire que tout Ētat qui se respecte et qui désire d’adhérer aux structures internationales ait en vue l’inclusion dans la constitution et la réalisation effective des exigences d’un Ētat de droit véritable.

  9. Poly(Ethylene Oxide)-Based Zn(II) Halide Electrolytes

    Science.gov (United States)

    1992-06-12

    References [1] Polymer Electrolyte Reviews-I, J. R. MacCallum and C. A. Vincent, eds., Elservier Applied Science, 1987. [2] Polymer Electrolyte...Reviews-2, J. R. MacCallum and C. A. Vincent, eds., Elservier Applied Science, 1989. [31 G, C. Farrington and R. G. Linford, in Polymer Electrolyte...Revievs-2, J. R. MacCallum and C. A. Vincent, eds., Elservier Applied Science, 1989. [4] G.K Jones, A. R. McGhie, and G. C. Farrington, to be appeared in

  10. COMPARACIÓN DE ALGUNAS PRUEBAS ESTADÍSTICAS ASINTÓTICAS DE NO-INFERIORIDAD PARA DOS PROPORCIONES INDEPENDIENTES

    OpenAIRE

    2009-01-01

    En este trabajo se compararon las pruebas asintóticas de noinferioridad de Blackwelder, Farrington-Manning, Böhning- Viwatwongkasen, Hauck-Anderson; la prueba de razón de verosimilitudes y dos variantes de estas pruebas con base en sus niveles de significancia reales y en sus potencias. La prueba de Farrington-Manning resultó con la mejor aproximación del nivel de significancia real al nivel nominal para tamaños de muestra 30n100 y para los tres límites de no-inferioridad más frecuentemente u...

  11. Probe into the Power Relations in “Counterparts”--From Cooperative Principle

    Institute of Scientific and Technical Information of China (English)

    Mo Yaping

    2016-01-01

    This article is to explore the characters’ power relations, even Ireland and Britain’s from Cooperative Principle to deeply analyze the dialogues between the hero Farrington and his boss in“Counterparts”.The deeply analysis of the dialogues can help readers better appreciate the author’s stylistic choices.

  12. Cognitive and Affective Empathy as Predictors of Proactive and Reactive Aggression

    Science.gov (United States)

    Gordon, Gina M.

    2013-01-01

    This study examined cognitive and affective empathy as predictors of proactive and reactive aggression. This study also explored whether levels of cognitive and affective empathy differed among children who use proactive and reactive aggression. Cognitive and affective empathy were measured by the Basic Empathy Scale (Jolliffe & Farrington,…

  13. Understanding the Relationship between Onset Age and Subsequent Offending during Adolescence

    Science.gov (United States)

    Bacon, Sarah; Paternoster, Raymond; Brame, Robert

    2009-01-01

    This article examines the well-documented relationship between early initiation or onset of criminal behavior and a heightened risk of involvement in offending. Previous research examining this question conducted by Nagin and Farrington ("Criminology" 30:235-260, 1992a; "Criminology" 30:501-523, 1992b) used data from the…

  14. Cognitive and Affective Empathy as Predictors of Proactive and Reactive Aggression

    Science.gov (United States)

    Gordon, Gina M.

    2013-01-01

    This study examined cognitive and affective empathy as predictors of proactive and reactive aggression. This study also explored whether levels of cognitive and affective empathy differed among children who use proactive and reactive aggression. Cognitive and affective empathy were measured by the Basic Empathy Scale (Jolliffe & Farrington,…

  15. Understanding the Relationship between Onset Age and Subsequent Offending during Adolescence

    Science.gov (United States)

    Bacon, Sarah; Paternoster, Raymond; Brame, Robert

    2009-01-01

    This article examines the well-documented relationship between early initiation or onset of criminal behavior and a heightened risk of involvement in offending. Previous research examining this question conducted by Nagin and Farrington ("Criminology" 30:235-260, 1992a; "Criminology" 30:501-523, 1992b) used data from the…

  16. Going to scale: A nonrandomized nationwide trial of the KiVa Antibullying Program for Grades 1-9

    NARCIS (Netherlands)

    Kärnä, A.; Voeten, M.J.M.; Little, T.D.; Poskiparta, E.H.; Alanen, E.; Salmivalli, C.

    2011-01-01

    Objective: The effects of school-based antibullying programs have typically been examined on small samples, with number of schools ranging from 1 to 78 (Farrington & Ttofi, 2009). This study investigated the effectiveness of the KiVa antibullying program in the beginning of its nationwide implementa

  17. Bully/Victim Problems among Preschool Children: A Review of Current Research Evidence

    Science.gov (United States)

    Vlachou, Maria; Andreou, Eleni; Botsoglou, Kafenia; Didaskalou, Eleni

    2011-01-01

    Bullying in schools has been identified as a serious and complex worldwide problem associated with negative short- and long-term effects on children's psychosocial adjustment (Smith 1999; Ttofi and Farrington, "Aggressive Behav" 34(4):352-368, 2008). Entering kindergarten is a crucial developmental step in many children's lives mainly because it…

  18. Bully/Victim Problems among Preschool Children: A Review of Current Research Evidence

    Science.gov (United States)

    Vlachou, Maria; Andreou, Eleni; Botsoglou, Kafenia; Didaskalou, Eleni

    2011-01-01

    Bullying in schools has been identified as a serious and complex worldwide problem associated with negative short- and long-term effects on children's psychosocial adjustment (Smith 1999; Ttofi and Farrington, "Aggressive Behav" 34(4):352-368, 2008). Entering kindergarten is a crucial developmental step in many children's lives mainly because it…

  19. Proton-induced cross-sections of nuclear reactions on lead up to 37 MeV

    CERN Document Server

    Ditrói, F; Takács, S; Hermanne, A

    2014-01-01

    Excitation function of proton induced nuclear reactions on lead for production of $^{206,205,204,203,202,201g}$Bi, $^{203cum,202m,201cum}$Pb and $^{202cum,201cum,200cum,199cum}$Tl radionuclides were measured up to 36 MeV by using activation method, stacked foil irradiation technique and $\\gamma$-ray spectrometry. The new experimental data were compared with the few earlier experimental results and with the predictions of the EMPIRE3.1, ALICE-IPPE (MENDL2p) and TALYS (TENDL-2012) theoretical reaction codes.

  20. [Policy recommendations based on SWOT analysis for agricultural industrialization of traditional Chinese medicinal materials--a case study of uncariae ramulus cum uncis from Jianhe county in Guizhou province].

    Science.gov (United States)

    Hu, Yong; Huo, Ke-Yi; Xiang, Hua

    2013-09-01

    This thesis reviews the historical background of agricultural industrialization, and analyzes the major theories of agricultural industrialization. It also utilizes SWOT analysis method to discuss the industrialization of traditional Chinese medicinal materials in Jianhe county, and finally it puts forward the recommendations for its further development.

  1. «Cum omnibus eorum cautelis, libris et scripturis». Charters of submission, accounts, statements and information networks in the dissolution of the Principality of Taranto (June 23, 1464 - February 20, 1465

    Directory of Open Access Journals (Sweden)

    Anna Airò

    2008-12-01

    Full Text Available The essay focuses on the system of current public records used in the principality of Taranto during the Orsini rule (first half of the 15th century. The research does not work directly on the surviving accounts or the legislative sources, but is based on the analysis of a peculiar source, produced in the crucial moment of the devolution of the principality to the crown after the death of the last prince of Taranto, Giovanni Antonio del Balzo Orsini (1463. In the late spring 1464 king Ferrante sent to the Salento an équipe of razionali of the Sommaria (the central financial office of the kingdom to analyze and register all the practices and the passages of the devolution of the Tarentine principality through the inspection of the existing account books, in order to take control of the patrimonial, jurisdictional and financial resources of the principality. This operation produced a considerable amount of letters written by the razionali in a couple of months: these sources are the result of the interaction between the Neapolitan officers and the local political powers of the vanished principality, and allow us to get concretely and day by day into the inner mechanism of production and functioning of a whole documentary system. This system, when in use, offered an articulated map of the territory and its resources through the sophisticated elaboration of a multiple-level complex of accounts, inventories, local and central archives. At the same time, it elaborated what we can call a real, huge data-base both of men, places, revenues and of written records.

  2. The theoretical-cum-statistical approach for the investigation of reaction NO2 + O(3P) → NO + O2 using SCTST and a full anharmonic VPT2 model

    Science.gov (United States)

    Shiekh, Bilal Ahmad; Kaur, Damanjit; Seth, Bharti; Mahajan, Shalagha

    2016-10-01

    The study of the titled reaction has been carried out using high-level quantum mechanics in conjugation with SCTST and VPT2 model. The many quantum mechanical methods have been employed in combinatory approach to find out the various properties such as energy, anharmonic vibrational coefficients and ro-vibrational parameters for the stationary points including the transition state of the reaction. Then the thermal rate coefficients were computed over a temperature regime of 150-1500 K and the corresponding results were compared with the available literature. In this temperature regime, our computed results are in excellent contrast with the experiment.

  3. «Cum omnibus eorum cautelis, libris et scripturis». Privilegi di dedizione, scritture di conti, rendicontazioni e reti informative nella dissoluzione del Principato di Taranto (23 giugno 1464 - 20 febbraio 1465

    Directory of Open Access Journals (Sweden)

    Anna Airò

    2008-12-01

    Full Text Available Il saggio esamina il sistema delle scritture pragmatiche in adozione nel Principato di Taranto in età orsiniana (prima metà del XV secolo, non tuttavia mediante l'analisi diretta dei registri contabili e della produzione normativa superstiti ma attraverso una speciale lente di ingrandimento: la descrizione delle minute, molteplici pratiche di devoluzione del principato attuata alla morte di Giovanni Antonio del Balzo Orsini (1463 da un équipe di razionali della Sommaria, inviati in missione in Salento con lo scopo precipuo di riconnettere al demanio regio i beni patrimoniali, giurisdizionali e fiscali del principato. Lo sguardo retrospettivo del carteggio, la fonte qui specificamente oggetto d'esame, prodotto dall'interazione tra i razionali napoletani e i poteri politici locali del dominio ormai dissolto (amministratori, gestori di diritti, comunità, signori, ecc. consente così di cogliere dall'interno e nel concreto del suo funzionamento, strutture e meccanismi d'azione dell'ordinamento scritturale orsiniano. Offrendone, al contempo, una messa in rilievo delle complesse logiche generative, in definitiva: misurare, attingere, inventariare, e poi marcare e archiviare in una enorme base dati scritta entità, quantità, equivalenze numeriche e costituzione socio-economica dei luoghi (città, terre, casali, saline, masserie della vasta compagine territoriale infeudata dalla fine del Trecento ai del Balzo Orsini.

  4. %10 KARBAMİT PEROKSİT ESASLI İKİ FARKLI BEYAZLATICI AJANIN KLİNİK BAŞARILARININ KARŞILAŞTIRILMASI-COMPARATIVE CUM CAL SUCCEESS OF TWO DIFFERENT 10% CARBAMIDE PEROXIDE BLEACHING AGENTS

    OpenAIRE

    2013-01-01

    ÖzetBu klinik çalışma, %1Q karbamit peroksit içeren 2 farklı vital beyazlatma ürününün (Colgate Platinum ve Brilliance) dişleri beyazlatma etkinliğinin karşılaştırılması amacıyla düzenlenmiştir. İki gruba ayrılan toplam 24 hastaya, beyazlatma ürünleri 2 hafta süreyle uygulanmıştır. Her 2 grupta da 5'er tetrasiklin hastası, 1'er ilo-rozis hastası yer almakta ve geri kalan hastaları ise Vita porselen ski asına göre en az A3 diş rengine sahip, isteğe bağlı beyazlatma vakaları oluşturmaktadır. Di...

  5. 囚禁离子非线性Jaynes-Cummings模型量子场熵演化特性%Evolution properties of the field quantum entropy in the nonlinear Jaynes-Cummings model of a trapped ion

    Institute of Scientific and Technical Information of China (English)

    刘王云; 毕思文; 豆西博

    2010-01-01

    利用Von Neuuman量子约化熵理论研究了驻波激光场与囚禁在谐振势中的离子单量子共振相互作用系统中量子场熵的时间演化特性,通过数值计算详细讨论了Lamb-Dick参数、离子质心在驻波激光场中的位置以及囚禁离子初始状态对量子场熵演化特性的影响.结果表明:Lamb-Dick参数影响囚禁离子与驻波激光场之间量子纠缠的频率和幅度,其值越大离子与光场之间的平均纠缠程度越低;随着离子质心从驻波激光场的波节向波腹移动,二者之间量子纠缠的振荡频率逐渐变慢,纠缠强度逐渐减弱;随着囚禁离子处于激发态概率的减小,离子与光场之间的量子纠缠呈现先增强后减弱的变化趋势.这些特性对于纠缠态的制备以及利用囚禁离子进行量子通讯等信息处理过程有一定的参考价值.

  6. Project on Training of Non-Formal Education Personnel: National Workshops in Bhutan, Nepal, and India cum Study Visits Undertaken by Teams of China, Lao PDR and Viet Nam (June 17-July 5, 1998) (APPEAL).

    Science.gov (United States)

    United Nations Educational, Scientific and Cultural Organization, Bangkok (Thailand). Principal Regional Office for Asia and the Pacific.

    This report is a summary of study visits plus workshops that took place in Bhutan, Nepal, and India in 1998 within the framework of UNESCO's Asia-Pacific Programme of Education for All (APPEAL). Three educators each from China, Lao PDR, and Vietnam and educators from the host countries participated. The project aimed to promote literacy and…

  7. 卡明斯诗歌"l(a"的多模态功能解读%A Multimodal Functional Analysis of the Poem "l(a" by E. E. Cummings

    Institute of Scientific and Technical Information of China (English)

    王红阳

    2007-01-01

    本文尝试用以韩礼德的系统功能语法理论为基础的多模态语篇分析(Multimodal Discourse Analysis)方法,对美国著名诗人卡明斯具有代表性的经典具体诗"1(a"从语言和印刷体式(typography)上做多方位的功能解读,目的是为了探讨从不同的角度分析和欣赏卡明斯诗歌的可行性.

  8. Metric Selection for Evaluation of Human Supervisory Control Systems

    Science.gov (United States)

    2009-12-01

    Conceptual model of human-supervisory control (modified from Pina , Cummings et al. (2008...42  4 LIST OF TABLES Table 1. Human supervisory control metric classes ( Pina , Donmez...literature in terms of human- autonomous vehicle interaction (Crandall & Cummings, 2007; Olsen & Goodrich, 2003; Pina , Cummings, Crandall, & Della Penna

  9. Experimental cross-sections for proton induced nuclear reactions on mercury up to 65 MeV

    Science.gov (United States)

    Hermanne, A.; Tárkányi, F.; Takács, S.; Ditrói, F.; Szücs, Z.; Brezovcsik, K.

    2016-07-01

    Cross-sections for formation of activation products induced by protons on natural mercury targets were measured. Results for 196m,196g,197g(cum), 198m,198g,199g(cum), 200g(cum), 201,202Tl, 194g(cum), 195g(cum), 196g(cum), 198m,199g(cum) Au and 195m,197m,203Hg are presented up to 65 MeV incident particle energy, many of these for the first time. The experimental data are compared with literature values and with the predictions of the TALYS 1.6 code (results taken from TENDL-2015 on-line library), thick target yields were derived and possible applications in biomedical sciences are discussed.

  10. Does Your Culture Encourage Innovation?

    Science.gov (United States)

    2015-04-01

    Does Your CULTURE Encourage INNOVATION ? CDR Craig Whittinghill, USN, David Berkowitz, and Phillip Farrington For many years military leaders...have been calling for the U.S. Armed Forces to be more agile, adaptive, and innovative in order to defeat future and emerging threats. To assist the...organization, culture, military, innovation , organic Report Documentation Page Form ApprovedOMB No. 0704-0188 Public reporting burden for the

  11. Mitigate Soft Target’s Vulnerability and Prevent Crime Through Biometrics

    Science.gov (United States)

    2013-12-01

    lead by Brandon Welsh and David Farrington on “Public Area CCTV and Crime Prevention: An Updated Systematic Review and Meta Analysis.” Their work...crime areas in which the mobile cameras provided 45 Public Area CCTV and Crime Prevention: An Updated Systematic Review and Meta‐Analysis, Brandon C...Lovell, C., Brian, C. Sanderson , T. Shan, and S. Chen. “Vision Processing in Intelligent CCTV for Mass Transport Security.” Safeguarding Australia

  12. Defense Acquisition Research Journal. Volume 22, Number 2, Issue 73

    Science.gov (United States)

    2015-04-01

    an industrialist and a business professor, with 20-plus years of experience in many facets of business from both a pragmatic perspective and real...two dilemmas to create a solution. Columbia Journal of World Business , 79(4), 63-67. DefenseARJApril2015, Vol.22No.3:216-839 235 A...Your Culture Encourage Innovation? CDR Craig Whittinghill, USN, David Berkowitz, and Phillip A. Farrington Online-only Article DoD Comprehensive

  13. Towards a dynamic understanding of burnout

    OpenAIRE

    2015-01-01

    Nurses in the UK currently face significant challenges: Austerity measures and efficiency drives have led to staff shortages (Nursing Times, 2013), and nurses suffering from higher rates of stress-related sickness when compared to other sectors (Foureur et al, 2013). The nature of the nursing role leaves nurses particularly vulnerable to burnout (Farrington, 1995). A pragmatic epistemological framework was adopted to conduct a mixed methods study, with qualitative focus, which set out to retr...

  14. In vivo evaluation of curcumin-loaded nanoparticles in a A549 xenograft mice model.

    Science.gov (United States)

    Yin, Hai-Tao; Zhang, De-Geng; Wu, Xiao-Li; Huang, Xin-En; Chen, Gang

    2013-01-01

    Curcumin (Cum) has been reported to have potential chemo-preventive and chemotherapeutic activity through influencing various processes, inducing cell cycle arrest, differentiation and apoptosis in a series of cancers. However, the poor solubility of Cum limits its further applications in the treatment of cancer. We have previously reported Cum-loaded nanoparticles (Cum-NPs) prepared with amphilic methoxy poly(ethylene glycol)-polycaprolactone (mPEG-PCL) block copolymers. The current study demonstrated superior antitumor efficacy of Cum-NPs over free Cum in the treatment of lung cancer. In vivo evaluation further demonstrated superior anticancer effects of Cum-NPs by delaying tumor growth compared to free Cum in an established A549 transplanted mice model. Moreover, Cum-NPs showed little toxicity to normal tissues including bone marrow, liver and kidney at a therapeutic dose. These results suggest that Cum-NPs are effective to inhibit the growth of human lung cancer with little toxicity to normal tissues, and could provide a clinically useful therapeutic regimen. They thus merit more research to evaluate the feasibility of clinical application.

  15. Synergistic antitumor efficiency of docetaxel and curcumin against lung cancer

    Institute of Scientific and Technical Information of China (English)

    Haitao Yin; Rui Guo; Yong Xu; Yulong Zheng; Zhibo Hou; Xinzheng Dai; Zhengdong Zhang; Donghui Zheng; Hua'e Xu

    2012-01-01

    Curcumin (Cum),the principal polyphenolic curcuminoid,obtained from the turmeric rhizome Curcuma longa,is recently reported to have potential antitumor effects in vitro and in vivo.Docetaxel (Doc) is considered as first-line chemotherapy for the treatment of non-small cell lung cancer.Here we report for the first time that Cum could synergistically enhance the in vitro and in vivo antitumor efficacy of Doc against lung cancer.In the current study,combination index (CI) is calculated in both in vitro and in vivo studies to determine the interaction between Cum and Doc.In the in vitro cytotoxicity test,media-effect analysis clearly indicated a synergistic interaction between Cum and Doc in certain concentrations.Moreover,in vivo evaluation further demonstrated the superior anticancer efficacy of Cum + Doc compared with Doc alone by intravenous delivery in an established A549 transplanted xenograft model.Results showed that Cum synergistically increased the efficacy of Doc immediately after 4 days of the initial treatment.Additionally,simultaneous administration of Cum and Doc showed little toxicity to normal tissues including bone marrow and liver at the therapeutic doses.Therefore,in vitro and in vivo evaluations demonstrated the satisfying synergistic antitumor efficacy of Cum and Doc against lung cancer and the introduction of Cum in traditional chemotherapy is a most promising way to counter the spread of nonsmall cell lung cancer.

  16. Ad Iuvenci Evangeliorum librum secundum commentarius exegeticus

    NARCIS (Netherlands)

    1947-01-01

    Cum evangelium a luvenco versibus latinis translatum perlegimus, iterum iterumque magna poetae peritia movemur; nam cum tam arte, ut ille fecit, sequi vis textum sacrum, magna vero peritia utendi lingua latina tibi opus est. Sed quam bene luvencus efficit ut suaviter possimus legere ea quae nobis pr

  17. China's First Extra-deep Horizontal Well Drilled in Tarim

    Institute of Scientific and Technical Information of China (English)

    1997-01-01

    @@ A high-yield commercial oil/gas flow with daily output of 168 cum of crude oil and 1.08 million cum of natural gas was obtained from Tarim exploration region on May 4, 1997 after its secondary test in Well Jiefang 128. This well is highly difficult to be drilled in the world.

  18. Institution's Title and Shibboleth: A Construct of Grammatical Relationship in Advertising Plates

    Science.gov (United States)

    Dalamu, Taofeek

    2017-01-01

    Institutions are known through the names-cum-titles shown on their signboards, internet websites, letterheads, etc. However, it seems that such cultures could not satisfy the yearning of most organizations. So, they further propagate their core values and traits by constructing short linguistic bursts-cum-contents that can expatiate on what the…

  19. The translation of Cummings’ work and the constructon of a domestic/Brazilian canon: a case study regarding Augusto de Campos’s translation project

    Directory of Open Access Journals (Sweden)

    Juliana Cristina Salvadori

    2016-01-01

    choices made by Augusto de Campos, thus, privilege, as he acknowledges, Cummings’s most innovative traits (and poems, that is, the formal aspects, obliterating the lyrical aspects of Cummings and building a domestic/ Brazilian canon for Cummings.

  20. Michigan/Air Force Research Laboratory (AFRL) Collaborative Center in Control Science (MACCCS)

    Science.gov (United States)

    2016-09-01

    Massachusetts Avenue Cambridge, MA 02139 The Ohio State University 2015 Neil Avenue Columbus, OH 43210...2016. Cummings (3) 1. Bertuccelli, L. F. & M.L. Cummings. "Scenario-based robust scheduling for collaborative human-UAV visual search tasks...and Systems (IROS), 2013. 7. V. A. Huynh and E. Frazzoli. Probabilistically- sound and asymptotically-optimal algorithm for stochastic control with

  1. 50 CFR 32.8 - Areas closed to hunting.

    Science.gov (United States)

    2010-10-01

    ... Wildlife Regudge 21 FR 6513. 2370 Oct. 16, 1939 Virginia Back Bay National Wildlife Refuge 3 CFR, Cum. Supp... .......do Back Bay National Wildlife Refuge 27 FR 104; 27 FR 858. Aug. 21, 1963 .......do Mackay Island..., 1939 Arkansas Big Lake National Wildlife Refuge 3 CFR Cum. Supp. 4 FR 1309. Oct. 24, 1958......

  2. Curcumin delivery by methoxy polyethylene glycol-poly(caprolactone) nanoparticles inhibits the growth of C6 glioma cells

    Institute of Scientific and Technical Information of China (English)

    Junfei Shao; Donghui Zheng; Zhifeng Jiang; Huae Xu; Yong Hu; Xiaolin Li; Xiaowei Lu

    2011-01-01

    As a potential anticancer agent, curcumin (Cum) has been reported for its chemopreventive and chemotherapeutic activity in a series of cancers through influencing cell cycle arrest, differentiation, apoptosis, etc. Therefore, the potential activity against various cancers of Cure raises the possibility of its application as a novel model drug in nanopartiele-based delivery systems. The current study reported a spherical core-shell structure curcumin-loaded nanoparticle (Cum-np) formed by amphllic methoxy polyethylene glycolpoly(caprolactone) (mPEG-PCL) block copolymers. Characterization tests indicated that Cum was incorporated into mPEG-PCL-based nanoparticles with high encapsulation efficiency due to its lipophilicity. The incorporated Cum could be released from Cum-np in a sustained manner. Cum was effectively transported into the cells by nanoparticles through endocytosis and localized around the nuclei in the cytoplasms. In vitro studies proved that the cytotoxicity of Cum-np would be pro-apoptosis effect against rat C6 glioma cell line in a dose-dependent manner. The present results suggest that Cum-np could be a potential useful chemotherapeutic formulation for malignant glioma therapy. Moreover, the development of traditional Chinese medicine with nanoscale drug formation warrants more intensive research for its clinical applications.

  3. 铜陵公铁两用长江大桥桁片式钢桁梁立体试拼装工艺%Techniques for Trial Vertical Assembly of Steel Truss Girder of Tongling Changjiang River Rail-cum-Road Bridge

    Institute of Scientific and Technical Information of China (English)

    邵天吉; 余本俊

    2014-01-01

    铜陵公铁两用长江大桥为五跨连续钢桁梁三索面斜拉桥,钢桁梁采用板桁结合形式,由3片主桁、上层正交异性公路板式桥面、下层正交异性铁路钢箱桥面及横联构成。钢桁梁采用整体焊接式桁片结构,每2个节间的主桁上、下弦杆,斜杆,竖杆通过整体节点焊接成桁片上桥安装。为验证制造工艺和精度并指导实桥施工,选取3.5个连续节间钢桁梁在工厂内一次完成立体试拼装。由于主桁桁片采用水平拼装制作工艺,采用800 t龙门吊机2×200 t吊钩提升加横移对桁片进行90°转体翻身后试拼装。试拼装过程中设置了抗推拉刚性斜撑增强桁片与铁路桥面的稳定性;在斜杆件加垫片,通过调整间隙控制桥梁预拱度。试拼装过程中设置了测量控制网,检测结果满足设计和验收标准,达到了立体试拼装目的。%The Tongling Changjiang River Rail‐cum‐Road Bridge is a five‐span continuous steel truss girder cable‐stayed bridge with three cable planes .The steel truss girder is the combined or‐thotropic steel plates and steel trusses structure ,containing three main trusses ,the upper ortho‐tropic steel plate deck for vehicles ,the lower orthotropic railway steel box deck and lateral brac‐ings .The steel truss girder is a integrally‐welded truss structure ,the upper and lower chords ,di‐agonal struts and vertical struts of the main trusses in every two blocks are welded by integral nodes to be truss block for assembling on the bridge .In order to verify the manufacturing tech‐nique and precision and to direct the construction of the real bridge ,the steel truss girder in 3 .5 continuous blocks were selected to conduct one‐time trial vertical assembly in the factory .The main truss blocks were fabricated by the horizontal assembling technique ,the 800 t overhead lift‐ing gantry with two lifting hooks of 200 t was adopted to lift and horizontally move the truss blocks and complete their 90°rotation and turning ,and then conduct the trial assembly .During the trial assembly ,the rigid diagonals resisting pushing and pulling forces were added to strengthen the stability of the truss blocks and the railway bridge deck .At the inclined members ,shims were wedged to control the precamber of bridge via adjusting the spacing .The survey control network was programmed as well during the assembling process ,the results of the inspection meet the de‐sign and acceptance standard ,achieving the goal of vertical assembly .

  4. Actividad Fungicida e Insecticida de Emulsiones Agua/Aceite de Mezclas de Extractos de Nicotiana tabacum, Azadiractha indica y Eucalyptus tereticornis Fungicidal and Insecticide Activities of Water-in-Oil Emulsions of Mixtures from Extracts of Nicotiana taba-cum, Azadiractha indica and Eucalyptus tereticornis

    Directory of Open Access Journals (Sweden)

    Walter Murillo

    2012-01-01

    Full Text Available Se realizó un estudio sobre el potencial insecticida agudo y crónico sobre Drosophila melanogaster y antifúngico en Fusarium oxysporum de emulsiones aceite-en-agua de mezclas binarias y ternarias de extractos de Nicotiana tabacum, Azadiractha indica fneem, y aceite esencial de Eucalyptus tereticornis. Se construyeron curvas dosis/respuesta para el tiempo letal medio, relación pupa-huevo, adulto-pupa y porcentaje inhibitorio para la actividad antifúngica. Se observó alta actividad insecticida aguda del tabaco a 6 g/L (tiempo letal medio=2,3 ± 0,5 minutos, larvicida en el neem a 0,2 g/L (pupa-huevo= 0,05 y fungicida en el eucalipto a 3 g/L (porcentaje inhibitorio =100%. Las bioactividades se potenciaron en la mayoría de las mezclas binarias, exceptuando la actividad fungicida. La mezcla ternaria presentó actividad fungicida antagónica. Se concluye sobre la potencial aplicación de estos desarrollos para controlar plagas y enfermedades.A study on the acute and chronic insecticide potential on Drosophila melanogaster and antifungal on Fusarium oxysporum of oil-in-water emulsions of binary and ternary mixtures of extracts of Nicotiana tabacum and Azadiractha indica (neem and Eucalyptus tereticornis essential oil. Dose/response curves for the mean lethal time, pupae-egg ratio, adult-pupae and inhibitory rate for antifungal activity were constructed, compared with the bioactivity mixtures, measuring synergism, antagonism and joint activity. High insecticidal acute activity was observed in tobacco to 6 g/L (mean lethal time=2.3 ± 0.5 minutes, the neem larvicide to 0.2 g/L (pupae-egg ratio=0.05 and fungicide in the eucalyptus to 3 g/L (inhibitory rate=100%. The bioactivities were enhanced in almost all binary and ternary mixtures, except for the fungicidal activity. The ternary mixture exhibits fungicidal activity antagonistic. The study shows the potential application of these technologies to control pests and diseases.

  5. Lead ingots from a shipwreck off Poompuhar, Tamil Nadu, east coast of India: Evidence for overseas trade and their significance

    Digital Repository Service at National Institute of Oceanography (India)

    Tripati, S.; Parthiban, G.; Vora, K.H.; Sundaresh; Bandodkar, S.N.

    major role in the history of trade. Metal ingots made of gold, silver, cop- per, zinc and lead are the only surviving evi- dence of raw metal trade with the exception of iron ore and can provide clues for dating shipwrecks. Ingots with a stamp or seal... ingots (A. J. Farrington, pers. comm). The different type of ingots having other manufacturing inscriptions in addition to W: Blackett provides the support for this speculation. Tranquebar (about 12 km south of Poompuhar) was ruled by the Danes between...

  6. Solid Electrolytes for Multivalent Cations

    Science.gov (United States)

    1990-06-30

    Hochstrasser, "Preparation and Optical Spectroscopy of Na-Bu(ll)-Beta" Alumina," Journal of the Electrochemical Society . vol 133, Iss 8, C343-C343, 1986 G...Rohrer, G.C. Farrington, "Color Center Formation and Electronic Conductivity in the Multivalent Beta" Alumina," Journal of the Electrochemical Society . vol...of Multivalent Beta" Aluminas," Journal of the Electrochemical Society . vol 135, Iss 3, C148-C148, 1988 M.A. Zendejas and J.O. Thomas, "A Molecular

  7. Influencia de las distorsiones cognitivas y las tipologías funcionales de la agresión sobre la reiteración delictiva en menores infractores

    OpenAIRE

    Roncero Villarreal, David

    2015-01-01

    Un número importante de jóvenes se involucran en comportamientos antisociales o disruptivos a lo largo de su adolescencia, aunque este tipo de conductas suelen estar limitadas a infracciones de escasa gravedad. Tan sólo una pequeña parte de los adolescentes comete actos delictivos graves y un número aún menor lo hacen de manera habitual y persistente (Farrington, 2008; Howell, 2009; Rechea, 2008; Redondo y Garrido, 2001). Sin embargo, es este reducido grupo de jóvenes el que suscita una mayor...

  8. Pro/antioxidant status and AP-1 transcription factor in murine skin following topical exposure to cumene hydroperoxide.

    Science.gov (United States)

    Murray, A R; Kisin, E R; Kommineni, C; Vallyathan, V; Castranova, V; Shvedova, A A

    2007-07-01

    Organic peroxides, widely used in the chemical and pharmaceutical industries, can act as skin tumor promoters and cause epidermal hyperplasia. They are also known to trigger free radical generation. The present study evaluated the effect of cumene hydroperoxide (Cum-OOH) on the induction of activator protein-1 (AP-1), which is linked to the expression of genes regulating cell proliferation, growth and transformation. Previously, we reported that topical exposure to Cum-OOH caused formation of free radicals and oxidative stress in the skin of vitamin E-deficient mice. The present study used JB6 P+ mouse epidermal cells and AP-1-luciferase reporter transgenic mice to identify whether exposure to Cum-OOH caused activation of AP-1, oxidative stress, depletion of antioxidants and tumor formation during two-stage carcinogenesis. In vitro studies found that exposure to Cum-OOH reduced the level of glutathione (GSH) in mouse epidermal cells (JB6 P+) and caused the induction of AP-1. Mice primed with dimethyl-benz[a]anthracene (DMBA) were topically exposed to Cum-OOH (82.6 micromol) or the positive control, 12-O-tetradecanoylphorbol-13-acetate (TPA, 17 nmol), twice weekly for 29 weeks. Activation of AP-1 in skin was detected as early as 2 weeks following Cum-OOH or TPA exposure. No AP-1 expression was found 19 weeks after initiation. Papilloma formation was observed in both the DMBA-TPA- and DMBA-Cum-OOH-exposed animals, whereas skin carcinomas were found only in the DMBA-Cum-OOH-treated mice. A greater accumulation of peroxidative products (thiobarbituric acid-reactive substances), inflammation and decreased levels of GSH and total antioxidant reserves were also observed in the skin of DMBA-Cum-OOH-exposed mice. These results suggest that Cum-OOH-induced carcinogenesis is accompanied by increased AP-1 activation and changes in antioxidant status.

  9. Changes in tau phosphorylation levels in the hippocampus and frontal cortex following chronic stress

    Directory of Open Access Journals (Sweden)

    C. Yang

    2014-03-01

    Full Text Available Studies have indicated that early-life or early-onset depression is associated with a 2- to 4-fold increased risk of developing Alzheimers disease (AD. In AD, aggregation of an abnormally phosphorylated form of the tau protein may be a key pathological event. Tau is known to play a major role in promoting microtubule assembly and stabilization, and in maintaining the normal morphology of neurons. Several studies have reported that stress may induce tau phosphorylation. The main aim of the present study was to investigate possible alterations in the tau protein in the hippocampus and frontal cortex of 32 male Sprague-Dawley rats exposed to chronic unpredictable mild stress (CUMS and then re-exposed to CUMS to mimic depression and the recurrence of depression, respectively, in humans. We evaluated the effects of CUMS, fluoxetine, and CUMS re-exposure on tau and phospho-tau. Our results showed that a single exposure to CUMS caused a significant reduction in sucrose preference, indicating a state of anhedonia. The change in behavior was accompanied by specific alterations in phospho-tau protein levels, but fluoxetine treatment reversed the CUMS-induced impairments. Moreover, changes in sucrose preference and phospho-tau were more pronounced in rats re-exposed to CUMS than in those subjected to a single exposure. Our results suggest that changes in tau phosphorylation may contribute to the link between depression and AD.

  10. Resveratrol exerts anti-inflammatory and neuroprotective effects to prevent memory deficits in rats exposed to chronic unpredictable mild stress.

    Science.gov (United States)

    Yazir, Yusufhan; Utkan, Tijen; Gacar, Nejat; Aricioglu, Feyza

    2015-01-01

    A number of studies have recently focused on the neuroprotective and anti-inflammatory effects of resveratrol. In prior studies, we described its beneficial effects on scopolamine-induced learning deficits in rats. The aim of this study was to investigate the effects of resveratrol on emotional and spatial cognitive functions, neurotropic factor expression, and plasma levels of proinflammatory cytokines in rats exposed to chronic unpredictable mild stress (CUMS), which is known to induce cognitive deficits. Resveratrol (5 or 20mg/kg) was administered intraperitoneally for 35 days. Rats in the CUMS group and in the 5mg/kg resveratrol+CUMS group performed poorly in tasks designed to assess emotional and spatial learning and memory. The 20mg/kg resveratrol+CUMS group showed improved performance compared to the CUMS group. In addition, the CUMS procedure induced lower expression of brain-derived neurotrophic factor and c-Fos in hippocampal CA1 and CA3 and in the amygdala of stressed rats. These effects were reversed by chronic administration of resveratrol (20mg/kg). In addition, plasma levels of tumor necrosis factor-alpha and interleukin-1 beta were increased by CUMS, but were restored to normal by resveratrol. These results indicate that resveratrol significantly attenuates the deficits in emotional learning and spatial memory seen in chronically stressed rats. These effects may be related to resveratrol-mediated changes in neurotrophin factor expression in hippocampus and in levels of proinflammatory cytokines in circulation.

  11. Changes in tau phosphorylation levels in the hippocampus and frontal cortex following chronic stress

    Energy Technology Data Exchange (ETDEWEB)

    Yang, C.; Guo, X. [Wuhan University, Renmin Hospital, Department of Psychiatry, Wuhan, China, Department of Psychiatry, Renmin Hospital, Wuhan University, Wuhan (China); Wang, G.H. [Wuhan University, Renmin Hospital, Department of Psychiatry, Wuhan, China, Department of Psychiatry, Renmin Hospital, Wuhan University, Wuhan (China); Wuhan University, Institute of Neuropsychiatry, Wuhan, China, Institute of Neuropsychiatry, Wuhan University, Wuhan (China); Wang, H.L.; Liu, Z.C.; Liu, H.; Zhu, Z.X.; Li, Y. [Wuhan University, Renmin Hospital, Department of Psychiatry, Wuhan, China, Department of Psychiatry, Renmin Hospital, Wuhan University, Wuhan (China)

    2014-03-03

    Studies have indicated that early-life or early-onset depression is associated with a 2- to 4-fold increased risk of developing Alzheimers disease (AD). In AD, aggregation of an abnormally phosphorylated form of the tau protein may be a key pathological event. Tau is known to play a major role in promoting microtubule assembly and stabilization, and in maintaining the normal morphology of neurons. Several studies have reported that stress may induce tau phosphorylation. The main aim of the present study was to investigate possible alterations in the tau protein in the hippocampus and frontal cortex of 32 male Sprague-Dawley rats exposed to chronic unpredictable mild stress (CUMS) and then re-exposed to CUMS to mimic depression and the recurrence of depression, respectively, in humans. We evaluated the effects of CUMS, fluoxetine, and CUMS re-exposure on tau and phospho-tau. Our results showed that a single exposure to CUMS caused a significant reduction in sucrose preference, indicating a state of anhedonia. The change in behavior was accompanied by specific alterations in phospho-tau protein levels, but fluoxetine treatment reversed the CUMS-induced impairments. Moreover, changes in sucrose preference and phospho-tau were more pronounced in rats re-exposed to CUMS than in those subjected to a single exposure. Our results suggest that changes in tau phosphorylation may contribute to the link between depression and AD.

  12. The involvement of cytochrome P450 peroxidase in the metabolic bioactivation of cumene hydroperoxide by isolated rat hepatocytes.

    Science.gov (United States)

    Anari, M R; Khan, S; O'Brien, P J

    1996-09-01

    Organic hydroperoxides are believed to be primarily detoxified in cells by the GSH peroxidase/GSSG reductase system and activated to cytotoxic radical species by non-heme iron. However, organic hydroperoxides seem to be bioactivated by cytochrome P450 (P450) in isolated hepatocytes as various P450 (particularly P450 2E1) inhibitors inhibited cumene hydroperoxide (CumOOH) metabolism and attenuated subsequent cytotoxic effects including antimycin A-resistant respiration, lipid peroxidation, iron mobilization, ATP depletion, and cell membrane disruption. CumOOH metabolism was also faster in P450 1A-induced hepatocytes and was inhibited by the P450 1A inhibitor alpha-naphthoflavone. The ferric chelator deferoxamine also prevented cytotoxicity even after CumOOH had been metabolized but had no effect on CumOOH metabolism. This emphasizes the toxicological significance of the iron released following hydroperoxide metabolic activation by cytochrome P450. The radical trap, 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO), had no effect on CumOOH metabolism but prevented CumOOH-induced antimycin A-resistant respiration, lipid peroxidation, iron mobilization, and loss of membrane integrity. These results suggest that CumOOH is metabolically activated by some P450 enzymes (e.g., P450 2E1) in hepatocytes to form reactive radical metabolites or oxidants that cause lipid peroxidation and cytotoxicity.

  13. Relationship between Chlamydia – Mycoplasma – Ureaplasma genital detection and semen concentration and motility among Greek men.

    Directory of Open Access Journals (Sweden)

    Ageliki Gerovassili

    2017-03-01

    Full Text Available One hundred and seventy two men at the State of Thessaly, Greece, inquiring semen analysis were enrolled in the study in order to investigate the incidence of Chlamydia, Ureaplasma and Mycoplasma (C-U-M genera in respect to total sperm number (TSN, progressive motility (grades a and b and total motility (grades a, b and c. Putative relation of C-U-M acquirement with sexual behavior was also investigated. Incidence of C-U-M among non-oligozoospermic and oligozoospermic men was similar. Νο correlation of C-U-M carriage to either oligozoospermia or asthenozoospermia was found. The tested semen parameters were negatively correlated to the age of sexual intercourse initiation and positively correlated to the number of sex partners. Early age of sexual intercourse initiation or high number of sexual partners was not statistical significantly correlated to C-U-M acquirement. Overall, TSN and motility (either progressive or total were not influenced by the presence of C-U-M genera in a sample of Greek population undergoing semen evaluation. To distinguish the role of C-U-M in male infertility and clarify the so far controversial scarce literature, large control case studies are needed using nucleic acid amplification techniques to detect these pathogens.

  14. Pro/antioxidant status in murine skin following topical exposure to cumene hydroperoxide throughout the ontogeny of skin cancer.

    Science.gov (United States)

    Shvedova, A A; Kisin, E R; Murray, A; Kommineni, C; Vallyathan, V; Castranova, V

    2004-01-01

    Organic peroxides used in the chemical and pharmaceutical industries have a reputation for being potent skin tumor promoters and inducers of epidermal hyperplasia. Their ability to trigger free radical generation is critical for their carcinogenic properties. Short-term in vivo exposure of mouse skin to cumene hydroperoxide (Cum-OOH) causes severe oxidative stress and formation of spin-trapped radical adducts. The present study was designed to determine the effectiveness of Cum-OOH compared to 12-O-tetradecanoylphorbol-13-acetate (TPA) in the induction of tumor promotion in the mouse skin, to identify the involvement of cyclooxygenase-2 (COX-2) in oxidative metabolism of Cum-OOH in keratinocytes, and to evaluate morphological changes and outcomes of oxidative stress in skin of SENCAR mice throughout a two-stage carcinogenesis protocol. Dimethyl-benz[a]anthracene (DMBA)-initiated mice were treated with Cum-OOH (32.8 micro mol) or TPA (8.5 nmol) twice weekly for 20 weeks to promote papilloma formation. Skin carcinoma formed only in DMBA/Cum-OOH-exposed mice. Higher levels of oxidative stress and inflammation (as indicated by the accumulation of peroxidative products, antioxidant depletion, and edema formation) were evident in the DMBA/Cum-OOH group compared to DMBA/TPA treated mice. Exposure of keratinocytes (HaCaT) to Cum-OOH for 18 h resulted in expression of COX-2 and increased levels of PGE(2). Inhibitors of COX-2 efficiently suppressed oxidative stress and enzyme expression in the cells treated with Cum-OOH. These results suggest that COX-2-dependent oxidative metabolism is at least partially involved in Cum-OOH-induced inflammatory responses and thus tumor promotion.

  15. 由一道易错题探一类集合的补集

    Institute of Scientific and Technical Information of China (English)

    曹秋芹

    2011-01-01

    题目 巳知全集U=R,M={x|(x-2)/(x2-2x-3)<0},求CUM.解法1:CUM={(x-2)/x2-2x-3≥0}={x|-1<x≤2或x>3}.解法2:M={x|(x-2)(x2-2x-3)<0}={x|x<-1或2<x<3},则CUM={x|-1≤x≤2或x≥3}.

  16. Dye solar cell research: EU delegation presentation

    CSIR Research Space (South Africa)

    Cummings, F

    2009-11-09

    Full Text Available stream_source_info Cummings1_2009.pdf.txt stream_content_type text/plain stream_size 3236 Content-Encoding UTF-8 stream_name Cummings1_2009.pdf.txt Content-Type text/plain; charset=UTF-8 DYE SOLAR CELL RESEARCH... Franscious Cummings Energy and Processes Materials Science and Manufacturing Council for Scientific and Industrial Research P.O. Box 395 Pretoria 0001, South Africa 13 November 2009 © CSIR 2007 www.csir.co.za CONTENT head2right...

  17. Dye solar cell research

    CSIR Research Space (South Africa)

    Cummings, F

    2009-11-01

    Full Text Available stream_source_info Cummings_2009.pdf.txt stream_content_type text/plain stream_size 3362 Content-Encoding UTF-8 stream_name Cummings_2009.pdf.txt Content-Type text/plain; charset=UTF-8 DYE SOLAR CELL RESEARCH Franscious... Cummings Energy and Processes Materials Science and Manufacturing Council for Scientific and Industrial Research P.O. Box 395 Pretoria 0001, South Africa 27 November 2009 CONTENT head2rightBackground head2rightCSIR Dye Solar Cell Research head2...

  18. 32 CFR 761.3 - Authority.

    Science.gov (United States)

    2010-07-01

    ...; 3 CFR, 1943 Cum. Supp., p. 504). (iv) Johnston Island Naval Defensive Sea Area; Johnston Island... territorial waters: (1) Johnston Island—Executive Order 6935 of December 29, 1934 as amended by...

  19. Activation cross sections of proton induced nuclear reactions on gold up to 65 MeV

    CERN Document Server

    Ditrói, F; Takács, S; Hermanne, A

    2016-01-01

    Activation cross sections of proton induced reactions on gold for production of $^{197m,197g,195m,195g, 193m,193g,192}$Hg, $^{196m,196g(cum),195g(cum),194,191(cum)}$Au, $^{191(cum)}$Pt and $^{192}$Ir were measured up to 65 MeV proton energy, some of them for the first time. The new data are in acceptably good agreement with the recently published earlier experimental data in the overlapping energy region. The experimental data are compared with the predictions of the TALYS 1.6 (results in TENDL-2015 on-line library) and EMPIRE 3.2 code.

  20. Activation cross sections of proton induced nuclear reactions on ytterbium up to 70 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Tarkanyi, F. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Hermanne, A. [Cyclotron Laboratory, Vrije Universiteit Brussel (VUB), 1090 Brussels (Belgium); Takacs, S.; Ditroi, F. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Kiraly, B. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary)], E-mail: kiralyb@atomki.hu; Yamazaki, H.; Baba, M.; Mohammadi, A. [Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai 980-8578 (Japan); Ignatyuk, A.V. [Institute of Physics and Power Engineering (IPPE), Obninsk 249020 (Russian Federation)

    2009-09-01

    Cross sections of proton induced nuclear reactions on ytterbium were measured up to 70 MeV by using the standard stacked foil irradiation technique and high-resolution gamma-ray spectroscopy. Experimental cross sections and derived integral yields are reported for the first time for the {sup nat}Yb(p,xn){sup 173,172mg,171mg,170,167}Lu, {sup nat}Yb(p,x){sup 175cum,166cum}Yb and {sup nat}Yb(p,x){sup 173ind,172ind,168,167cum,165cum}Tm reactions. No earlier experimental cross section data were found in the literature. The experimental data were compared to and analyzed with the results of the theoretical model code ALICE-IPPE. Production routes of medical radioisotope {sup 167}Tm are discussed.

  1. New measurements and evaluation of excitation functions for (p,xn), (p,pxn) and (p,2pxn) reactions on {sup 133}Cs up to 70 MeV proton energy

    Energy Technology Data Exchange (ETDEWEB)

    Tarkanyi, F. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Hermanne, A. [Vrije Universiteit Brussel (VUB), 1090 Brussels (Belgium); Takacs, S.; Ditroi, F. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Kiraly, B. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary)], E-mail: kiralyb@atomki.hu; Yamazaki, H.; Baba, M.; Mohammadi, A. [Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai 980-8578 (Japan); Ignatyuk, A.V. [Institute of Physics and Power Engineering (IPPE), Obninsk 249020 (Russian Federation)

    2010-01-15

    Cross sections for production of the therapeutic radioisotope {sup 131}Cs via the {sup 133}Cs(p,3n){sup 131}Ba{yields}{sup 131}Cs route were investigated at cyclotrons. Excitation functions of the {sup 133}Cs(p,x){sup 133m,133mg,131mg,129g,129m,128}Ba, {sup 132,129cum,127cum}Cs and {sup 129m(ind),127cum,125cum}Xe nuclear reactions were measured up to 70 MeV proton energy. The experimental data were compared to the results of model calculations performed by means of ALICE-IPPE, EMPIRE-II and TALYS computer codes. Good overall agreement was observed. On the basis of the measured excitation functions integral yields were deduced. Charged particle production routes of {sup 131}Cs are discussed.

  2. Study of activation cross sections of proton induced reactions on barium: Production of {sup 131}Ba{yields}{sup 131}Cs

    Energy Technology Data Exchange (ETDEWEB)

    Tarkanyi, F.; Ditroi, F. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Kiraly, B., E-mail: kiralyb@atomki.h [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Takacs, S. [Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), 4026 Debrecen, Bem ter 18/c (Hungary); Hermanne, A. [Vrije Universiteit Brussel (VUB), 1090 Brussels (Belgium); Yamazaki, H.; Baba, M.; Mohammadi, A. [Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai 980-8578 (Japan); Ignatyuk, A.V. [Institute of Physics and Power Engineering (IPPE), Obninsk 249020 (Russian Federation)

    2010-10-15

    In the frame of a systematic study of charged particle production routes of the therapeutic radioisotope {sup 131}Cs, excitation functions of the {sup nat}Ba(p,x){sup 135,132mg}La, {sup ind135m,cum133m,cum133mg,cum131mg}Ba and {sup 136mg,134mg,132,cum129}Cs reactions were measured in the 30-70 MeV energy range using stacked foil irradiation technique, activation method and gamma spectroscopy. Comparisons with new results of the ALICE-IPPE and EMPIRE-II codes and with existing data obtained with TALYS code are shown. From the measured cross section data integral yields were calculated and compared with experimental integral yield data reported in the literature. Potential use of proton induced reactions on Ba for production of {sup 131}Cs is discussed.

  3. Ramon Rask võitleb põhimõtte pärast / Marian Männi

    Index Scriptorium Estoniae

    Männi, Marian

    2007-01-01

    Portreelugu Tartu Ülikooli õigusteaduskonna cum laude lõpetanud Ramon Raskist, tema kohtuvõitlusest ülikooliga; professionaalse tasuta õigusabi võimalustest tudengitele Paul Varuli advokaadibüroo poolt Eesti Üliõpilasliidu juures

  4. Sámuel Gyarmathi "Affinitas" 200-aastane : Vinnugor Világ, 1999, nr 4 / Gábor Zaicz ; refereerinud Kadi Raudalainen

    Index Scriptorium Estoniae

    Zaicz, Gábor

    2000-01-01

    Ungari arstiteadlase Sámuel Gyamathi ladinakeelsest uurimusest "Affinitas linguae Hungaricae cum linguis Fennicae originis grammaticae demonstrata" ("Grammatiline tõestus ungari keele ja soome päritolu keelte suguluse kohta")

  5. Infe~lity 0

    African Journals Online (AJOL)

    ment of energy balance in individual cow is cum- .... acid 'detergent fibre (ADF). neutral detergent fibre' ... differences were 'obtairiedby, deducting mean base ment 2 'co\\vs were 'also ~tatistically significant ..... Ato'mic'Energy Agency.

  6. Ramon Rask võitleb põhimõtte pärast / Marian Männi

    Index Scriptorium Estoniae

    Männi, Marian

    2007-01-01

    Portreelugu Tartu Ülikooli õigusteaduskonna cum laude lõpetanud Ramon Raskist, tema kohtuvõitlusest ülikooliga; professionaalse tasuta õigusabi võimalustest tudengitele Paul Varuli advokaadibüroo poolt Eesti Üliõpilasliidu juures

  7. Nonallergic rhinopathy

    Science.gov (United States)

    ... V, et al., eds. Cummings Otolaryngology: Head & Neck Surgery . 6th ed. Philadelphia, PA: Elsevier Mosby; 2015:chap ... of Medicine, Division of Allergy, Immunology, and Rheumatology, Georgetown University Medical School, Washington, DC. ...

  8. Allergic rhinitis

    Science.gov (United States)

    ... invader References Baroody FM, Naclerio RM. Allergy and immunology of the upper airway. In: Flint PW, Haughey BH, Lund V, et al, eds. Cummings Otolaryngology: Head & Neck Surgery . 6th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap ...

  9. Solving Two Kinds of JC Models Relating to Two-Photon Process by Supersymmetric Transformation

    Institute of Scientific and Technical Information of China (English)

    FAN Hong-Yi; Wei-Jun

    2004-01-01

    We propose two kinds of new Jaynes Cummings models relating to two-photon process by using the supersymmetric unitary transformation. The corresponding energy eigenvalues and eigenvectors are obtained.

  10. 561 Piracy in Somalia and Operation Atalanta: The Need for a ...

    African Journals Online (AJOL)

    User

    2010-10-17

    Oct 17, 2010 ... ... illegal dumping of chemical and industrial waste in that region. .... force of pirate psychology in Somalia? Can a legal cum ... eye of Ethnic Somali within Somalia and those living in Djibouti, Kenya and. Ethiopia. .... Measures.

  11. Does decoherence in the thermodynamic limit exist?

    CERN Document Server

    Frasca, M

    2002-01-01

    We consider the Jaynes-Cummings model for N particles in the thermodynamic limit showing how it can produce decoherence on a Schr\\"odinger cat state. This mechanism can be observed in current experiments with cavities.

  12. Plaadid / Mirjam Tally

    Index Scriptorium Estoniae

    Tally, Mirjam, 1976-

    2003-01-01

    Uutest plaatidest "Mirjam Tally", Jennifer Love Hewitt "Barenaked", Sam "Being Under The Influence", Slade "Cum On Let's Party", The Dandy Warhols "Welcome To The Monkey House", Audio Bullys "Ego War"

  13. Synopsis Hymenophyllacearum, Monographiae Hujus Ordinjs Prodromus, auctore R. B. van den Bosch M. D. mit zahlreichen Zusätzen und Abbildungen aus dem Nachlass des Verfassers neu herausgegeben

    NARCIS (Netherlands)

    Goddijn, W.A.

    1913-01-01

    Frons simplex e cellularum consimilium stratis quatuor contexta, costa nulla, venae e basi radiantes furcatae, steriles ante marginem apice incrassato desinentes, fertiles cum vena secundaria marginali confluentes, sori terminales trichomanei, receptaculum crassum aequale teres parumper exsertum. 1.

  14. Coléoptères nouveaux ou peu connus du Musée de Leyde

    NARCIS (Netherlands)

    Fairmaire, L.

    1887-01-01

    Long. 13 millim. — Elongatus, modice convexus, rufus, modice nitidus, capite infuscato, fulvo-pubescens, subtus cum pedibus dilute rufescens, tarsis obscuris; capite summo fortiter punctato, antice transversim late impresso et subtilius sed densius punctato, labro rufescente, late sinuato; antennis

  15. Research Paper ISSN 0189-6016©2009

    African Journals Online (AJOL)

    oxidative stress in general (Alessio, 1993; Venditti et al., 1996) by oxygen ... The production of free radicals increases in parallel with the .... cum co-treated control (EPCC) - received composite extract through oral route as .... Statistical analysis.

  16. Ear wax

    Science.gov (United States)

    ... al, eds. Cummings Otolaryngology . 6th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 138. O'Handley JG, Tobin ... Textbook of Family Medicine . 9th ed. Philadelphia, PA: Elsevier; 2016:chap 18. Pfaff JA, Moore GP. Otolaryngology. ...

  17. A Review of the Dodo and its Ecosystem: Interdisciplinary Research of a Vertebrate Concentration-Lagerstätte in Mauritius

    NARCIS (Netherlands)

    Rijsdijk, K.F.; Hume, J.P.; de Louw, P.G.B.; Meijer, H.J.M.; Janoo, A.; de Boer, E.J.; Steel, L.; de Vos, J.; van der Sluis, L.G.; Hooghiemstra, H.; Florens, F.B.V.; Baider, C.; Vernimmen, T.J.J.; Baas, P.; van Heteren, A.H.; Rupear, V.; Beebeejaun, G.; Grihault, A.; van der Plicht, J.; Besselink, M.; Lubeek, J.K.; Jansen, M.; Kluiving, S.J.; Hollund, H.; Shapiro, B.; Collins, M.; Buckley, M.; Jayasena, R.M.; Porch, N.; Floore, R.; Bunnik, F.; Biedlingmaier, A.; Leavitt, J.; Monfette, G.; Kimelblatt, A.; Floore, P.; Claessens, L.P.A.M.

    2016-01-01

    The dodo Raphus cucullatus Linnaeus, 1758 Linnaeus, C. 1758. Systema Naturae per Tegna Tria Naturae, Secundum Classes, Ordines, Genera, Species, cum Characteribus, Differentiis, Synonymis, Locis. Tenth Edition. Laurentii Salvii, Stockholm, 824 pp., an extinct and flightless, giant pigeon endemic to

  18. Sámuel Gyarmathi "Affinitas" 200-aastane : Vinnugor Világ, 1999, nr 4 / Gábor Zaicz ; refereerinud Kadi Raudalainen

    Index Scriptorium Estoniae

    Zaicz, Gábor

    2000-01-01

    Ungari arstiteadlase Sámuel Gyamathi ladinakeelsest uurimusest "Affinitas linguae Hungaricae cum linguis Fennicae originis grammaticae demonstrata" ("Grammatiline tõestus ungari keele ja soome päritolu keelte suguluse kohta")

  19. Changing universe model of redshift

    CERN Document Server

    Hodge, J C

    2004-01-01

    The changing universe model (CUM) describes galaxy parameter relationships (SESAPS '03, session EB 2). The CUM must be successfully applied to cosmological scale observations to be considered a cosmological model. A major component of current cosmological models is the Hubble constant $H_\\mathrm{o}$. An equation is derived using the CUM model relating redshift $z$ and the distance $D$ to galaxies and is applied to a sample of 32 spiral galaxies with $D$ calculated using Cepheid variable stars. The equation predicts a galaxy may have $z<0$ in special circumstances. Three elliptical galaxies with peculiar characteristics are discovered to be CUM Sinks. The Sinks give a physical explanation of the ``Virgocentric infall'' and ``Great Attractor'' observations without a large, unobserved mass. At low cosmological distances, the equation reduces to $z \\approx \\exp(KD) -1 \\approx KD$, where $K$ is a constant, positive value. The equation predicts $z$ from galaxies over 23 Gpc distant approaches a constant value on...

  20. Extension of the excitation functions of deuteron induced reactions on natSn up to 50 MeV

    Science.gov (United States)

    Hermanne, A.; Tárkányi, F.; Ditrói, F.; Takács, S.

    2017-01-01

    Using the stacked-foil activation technique, cross-sections of deuteron induced reactions on natural Sn targets were determined up to 50 MeV. Excitation functions are reported for the product nuclides 116mSb, 117Sb, 118mSb, 120mSb 122m+gSb, 124m+gSb, 110Sn(cum), 113m+gSn(cum), 117mSn, 110mIn(cum), 110gIn, 111m+gIn(cum), 113mIn, 114mIn 115mIn. Comparison with earlier published data at lower energy is discussed. For all excitation functions a theoretical calculation using the TALYS 1.6 (on-line TENDL-2015 library) code is shown.

  1. La Mystagogie de Saint Maxime le Confesseur

    Directory of Open Access Journals (Sweden)

    Florin Crismareanu

    2011-12-01

    Full Text Available Review of: Maximi Confessoris, Mystagogia: una cum Latina interpretatione Anastasii Bibliothecarii, edita a Christian Boudignon, Turnhout: Brepols, Corpus Christianorum. Series Graeca, nr. 69, 2011, 187 + 99 p.

  2. Plaadid / Mirjam Tally

    Index Scriptorium Estoniae

    Tally, Mirjam, 1976-

    2003-01-01

    Uutest plaatidest "Mirjam Tally", Jennifer Love Hewitt "Barenaked", Sam "Being Under The Influence", Slade "Cum On Let's Party", The Dandy Warhols "Welcome To The Monkey House", Audio Bullys "Ego War"

  3. Ecological evaluation of two prawn culture fields in the Cochin Backwater based on premonsoon diurnal observations

    Digital Repository Service at National Institute of Oceanography (India)

    Balasubramanian, T.; Viswakumar, M.; Venugopal, P.

    Extensive low lying areas of the Cochin Backwater peripheries at its lower reaches are bunded into interconnected ponds for paddy-cum-prawn culture. Results of a study of two representative ponds are reported. The ponds under study were found...

  4. 6. IGHODARO et al

    African Journals Online (AJOL)

    Ekaette J Eyo

    EFFECTS OF Piliostigma thonningii ETHYL ACETATE LEAF EXTRACT ON. ALUMINIUM-CUM ... medicines such as antacids, phosphate binders, buffered aspirin .... Particularly, it competes with Mg, Zn and Ca for absorption, and as a trivalent ...

  5. INCOMMANDS TDP: Human Factors Design and Evaluation Guide (PDT INCOMMANDS: Guide de Conception et d’Evaluation des Facteurs Humains)

    Science.gov (United States)

    2009-12-01

    Pina , Donmez and Cummings [30]. Since all operator-based measures must take into account individual differences, some form of experimental...validity of this tool, it is not clear how widely it is used. See Pina [30] for other rating scales for measuring human-computer trust. DRDC...Organization. DRDC Toronto TR 2009-062 243 [30] Pina , P. E., Donmez, B., and Cummings, M. L. (2008), Selecting metrics to evaluate human supervisory

  6. A Framework for an HSI Downselection Tool

    Science.gov (United States)

    2009-07-01

    24 REFERENCES Sage, A.P. & W. B. Rouse, ed. (2003). Handbook of Systems Engineering and Management. New York: Wiley-Interscience. Donmez, B., Pina ...Making. In E. Gavriel Salvendy, Handbook of Human Factors and Ergonomics, 2nd Edition. New York: John Wiley and Sons, Inc. Cummings, M.L. & P. Pina ...Aeronautics and Astronautics. Pina , P. & M. L. Cummings (2008). Identifying Generalizable Metric Classes to Evaluate Human-Robot Teams. Metrics

  7. Microglial NLRP3 inflammasome activation mediates IL-1β-related inflammation in prefrontal cortex of depressive rats.

    Science.gov (United States)

    Pan, Ying; Chen, Xu-Yang; Zhang, Qing-Yu; Kong, Ling-Dong

    2014-10-01

    Depression is an inflammatory disorder. Pro-inflammatory cytokine interleukin-1 beta (IL-1β) may play a pivotal role in the central nervous system (CNS) inflammation of depression. Here, we investigated IL-1β alteration in serum, cerebrospinal fluid (CSF) and prefrontal cortex (PFC) of chronic unpredictable mild stress (CUMS)-exposed rats, a well-documented model of depression, and further explored the molecular mechanism by which CUMS procedure induced IL-1β-related CNS inflammation. We showed that 12-week CUMS procedure remarkably increased PFC IL-1β mRNA and protein levels in depressive-like behavior of rats, without significant alteration of serum and CSF IL-1β levels. We found that CUMS procedure significantly caused PFC nuclear factor kappa B (NF-κB) inflammatory pathway activation in rats. The intriguing finding in this study was the induced activation of nucleotide binding and oligomerization domain-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome with the increased IL-1β maturation in PFC of CUMS rats, suggesting a new grade of regulatory mechanism for IL-1β-related CNS inflammation. Moreover, microglial activation and astrocytic function impairment were observed in PFC of CUMS rats. The increased co-location of NLRP3 and ionized calcium binding adaptor molecule 1 (Iba1) protein expression supported that microglia in glial cells was the primary contributor for CUMS-induced PFC NLRP3 inflammasome activation in rats. These alterations in CUMS rats were restored by chronic treatment of the antidepressant fluoxetine, indicating that fluoxetine-mediated rat PFC IL-1β reduction involves both transcriptional and post-transcriptional regulatory mechanisms. These findings provide in vivo evidence that microglial NLRP3 inflammasome activation is a mediator of IL-1β-related CNS inflammation during chronic stress, and suggest a new therapeutic target for the prevention and treatment of depression.

  8. Curcumin sensitizes glioblastoma to temozolomide by simultaneously generating ROS and disrupting AKT/mTOR signaling.

    Science.gov (United States)

    Yin, Haitao; Zhou, Yun; Wen, Cuixia; Zhou, Chong; Zhang, Wei; Hu, Xiang; Wang, Lifeng; You, Chuanwen; Shao, Junfei

    2014-10-01

    Temozolomide (TMZ), a DNA alkylating agent, represents the most important chemotherapeutic option for the treatment of glioblastoma in the clinic. Despite its frequent use, the therapeutic efficacy of TMZ remains very limited due to its frequent resistance in glioblastoma. Previous evidence suggested that curcumin (CUM), an ingredient of the Indian spice turmeric, is able to sensitize glioblastoma to TMZ treatment. However, the underlying molecular mechanism remains elusive. In the present study, we performed in vitro and in vivo experiments to evaluate the interaction of CUM and TMZ on the inhibition of glioblastoma and to investigate its potential mechanisms of action using U87MG cell lines and xenograft mouse models. We demonstrated that CUM enhanced the therapeutic response to TMZ in U87MG glioblastoma by enhancing apoptosis. We then proceeded to investigate the potential apoptotic signaling pathways that are involved. We observed a synergistic effect of the combination of CUM and TMZ in generating reactive oxygen species (ROS) production, suggesting that ROS may contribute to the impact of CUM on sensitizing TMZ treatment. We also showed that CUM and TMZ treatment alone significantly suppressed phosphorylated AKT and mTOR, whereas their combination achieved a more pronounced inhibitory effect. These data indicated that blockage of AKT/mTOR signaling appeared to contribute to the elevated apoptosis caused by the combination treatment with CUM and TMZ. In conclusion, this study provided molecular insights into the effects of CUM on the therapeutic response of glioblastoma to TMZ and opened new avenues for optimizing the therapeutic effects of TMZ-based therapies.

  9. Predictive Value of Cumulative Blood Pressure for All-Cause Mortality and Cardiovascular Events

    Science.gov (United States)

    Wang, Yan Xiu; Song, Lu; Xing, Ai Jun; Gao, Ming; Zhao, Hai Yan; Li, Chun Hui; Zhao, Hua Ling; Chen, Shuo Hua; Lu, Cheng Zhi; Wu, Shou Ling

    2017-02-01

    The predictive value of cumulative blood pressure (BP) on all-cause mortality and cardiovascular and cerebrovascular events (CCE) has hardly been studied. In this prospective cohort study including 52,385 participants from the Kailuan Group who attended three medical examinations and without CCE, the impact of cumulative systolic BP (cumSBP) and cumulative diastolic BP (cumDBP) on all-cause mortality and CCEs was investigated. For the study population, the mean (standard deviation) age was 48.82 (11.77) years of which 40,141 (76.6%) were male. The follow-up for all-cause mortality and CCEs was 3.96 (0.48) and 2.98 (0.41) years, respectively. Multivariate Cox proportional hazards regression analysis showed that for every 10 mm Hg·year increase in cumSBP and 5 mm Hg·year increase in cumDBP, the hazard ratio for all-cause mortality were 1.013 (1.006, 1.021) and 1.012 (1.006, 1.018); for CCEs, 1.018 (1.010, 1.027) and 1.017 (1.010, 1.024); for stroke, 1.021 (1.011, 1.031) and 1.018 (1.010, 1.026); and for MI, 1.013 (0.996, 1.030) and 1.015 (1.000, 1.029). Using natural spline function analysis, cumSBP and cumDBP showed a J-curve relationship with CCEs; and a U-curve relationship with stroke (ischemic stroke and hemorrhagic stroke). Therefore, increases in cumSBP and cumDBP were predictive for all-cause mortality, CCEs, and stroke.

  10. Progressive alterations of hippocampal CA3-CA1 synapses in an animal model of depression.

    Science.gov (United States)

    Qiao, Hui; An, Shu-Cheng; Ren, Wei; Ma, Xin-Ming

    2014-12-15

    Major depressive disorder is the most prevalent psychiatric condition, but the cellular and molecular mechanisms underlying this disorder are largely unknown, although multiple hypotheses have been proposed. The aim of this study was to characterize the progressive alteration of neuronal plasticity in the male rat hippocampus during depression induced by chronic unpredictable mild stress (CUMS), an established animal model of depression. The data in the hippocampus were collected on days 7, 14 and 21 after the onset of three-week CUMS. When analyzed on day 21, three-week CUMS induced typically depressive-like behaviors, impaired LTP induction, and decreased basal synaptic transmission at hippocampal CA3-CA1 synapses recorded in vivo, which was accompanied by decreased density of dendritic spines in CA1 and CA3 pyramidal neurons. The levels of both Kalirin-7 and brain-derived neurotrophic factor (BDNF) in the hippocampus were decreased at the same time. On day 14 (middle phase), some depressive-like behaviors were observed, which was accompanied by depressed basal synaptic transmission and enhanced LTP induction at the CA3-CA1 synapses. However, BDNF expression was decreased without alteration of Kalirin7 expression in comparison with no-stress control. Depressed basal synaptic transmission occurred in the middle phase of CUMS may contribute to decreased expression of BDNF. On day 7, depressive-like behaviors were not observed, and LTP induction, spine density, Kalirin-7 and BDNF expression were not altered by CUMS in comparison with no-stress control. These results showed that the functional changes at CA3-CA1synapses occurred earlier than the structural alteration during three-week CUMS as a strategy of neural adaptation, and rats required three weeks to develop depressive-like behaviors during CUMS. Our results suggest an important role of Kalirin-7 in CUMS-mediated alterations in spine density, synaptic function and overall depressive-like behaviors on day 21.

  11. Thymol produces an antidepressant-like effect in a chronic unpredictable mild stress model of depression in mice.

    Science.gov (United States)

    Deng, Xue-Yang; Li, Hong-Yan; Chen, Jun-Jun; Li, Rui-Peng; Qu, Rong; Fu, Qiang; Ma, Shi-Ping

    2015-09-15

    Thymol, a bioactive monoterpene isolated from Thymus vulgaris, has displayed inspiring neuroprotective properties. The present study was designed to evaluate the antidepressant-like effects of thymol on a chronic unpredictable mild stress (CUMS) model of depression in mice and explore the underlying mechanisms. It was observed that thymol treatment (15 mg/kg and 30 mg/kg) significantly reversed the decrease of sucrose consumption, the loss of body weight, the reduction of immobile time in the tail suspension tests (TST) and forced swimming tests (FST) induced by CUMS paradigm. The levels of norepinephrine (NE) and serotonin (5-HT) in the hippocampus decreased in the CUMS-treated mice. Chronic treatments with thymol significantly restored the CUMS-induced alterations of monoamine neurotransmitters in the hippocampus. Our results further demonstrated that thymol administration negatively regulated the induction of proinflammatory cytokines including interleukin (IL)-1β, IL-6, and tumor necrosis factor-α in CUMS mice. Furthermore, thymol inhibited the activation of nod-like receptor protein 3 (NLRP3) inflammasome and its adaptor, and subsequently decreased the expression of caspase-1. In sum, our findings suggested that thymol played a potential antidepressant role in CUMS mice model through up-regulating the levels of central neurotransmitters and inhibiting the expressions of proinflammatory cytokines, which might provide potential for thymol in the light of opening up new therapeutic avenues for depression.

  12. Hydrogen Sulfide Protects against Chronic Unpredictable Mild Stress-Induced Oxidative Stress in Hippocampus by Upregulation of BDNF-TrkB Pathway

    Directory of Open Access Journals (Sweden)

    Min Hu

    2016-01-01

    Full Text Available Chronic unpredictable mild stress (CUMS induces hippocampal oxidative stress. H2S functions as a neuroprotectant against oxidative stress in brain. We have previously shown the upregulatory effect of H2S on BDNF protein expression in the hippocampus of rats. Therefore, we hypothesized that H2S prevents CUMS-generated oxidative stress by upregulation of BDNF-TrkB pathway. We showed that NaHS (0.03 or 0.1 mmol/kg/day ameliorates the level of hippocampal oxidative stress, including reduced levels of malondialdehyde (MDA and 4-hydroxy-2-trans-nonenal (4-HNE, as well as increased level of glutathione (GSH and activity of superoxide dismutase (SOD in the hippocampus of CUMS-treated rats. We also found that H2S upregulated the level of BDNF and p-TrkB protein in the hippocampus of CUMS rats. Furthermore, inhibition of BDNF signaling by K252a, an inhibitor of the BDNF receptor TrkB, blocked the antioxidant effects of H2S on CUMS-induced hippocampal oxidative stress. These results reveal the inhibitory role of H2S in CUMS-induced hippocampal oxidative stress, which is through upregulation of BDNF/TrkB pathway.

  13. Chronic unpredictive mild stress leads to altered hepatic metabolic profile and gene expression.

    Science.gov (United States)

    Jia, Hong-Mei; Li, Qi; Zhou, Chao; Yu, Meng; Yang, Yong; Zhang, Hong-Wu; Ding, Gang; Shang, Hai; Zou, Zhong-Mei

    2016-03-23

    Depression is a complex disease characterized by a series of pathological changes. Research on depression is mainly focused on the changes in brain, but not on liver. Therefore, we initially explored the metabolic profiles of hepatic extracts from rats treated with chronic unpredictive mild stress (CUMS) by UPLC-Q-TOF/MS. Using multivariate statistical analysis, a total of 26 altered metabolites distinguishing CUMS-induced depression from normal control were identified. Using two-stage receiver operating characteristic (ROC) analysis, 18 metabolites were recognized as potential biomarkers related to CUMS-induced depression via 12 metabolic pathways. Subsequently, we detected the mRNA expressions levels of apoptosis-associated genes such as Bax and Bcl-2 and four key enzymes including Pla2g15, Pnpla6, Baat and Gad1 involved in phospholipid and primary bile acid biosynthesis in liver tissues of CUMS rats by real-time qRT-PCR assay. The expression levels of Bax, Bcl-2, Pla2g15, Pnpla6 and Gad1 mRNA were 1.43,1.68, 1.74, 1.67 and 1.42-fold higher, and those of Baat, Bax/Bcl-2 ratio mRNA were 0.83, 0.85-fold lower in CUMS rats compared with normal control. Results of liver-targeted metabonomics and mRNA expression demonstrated that CUMS-induced depression leads to variations in hepatic metabolic profile and gene expression, and ultimately results in liver injury.

  14. Brain-derived neurotrophic factor signalling mediates the antidepressant-like effect of piperine in chronically stressed mice.

    Science.gov (United States)

    Mao, Qing-Qiu; Huang, Zhen; Zhong, Xiao-Ming; Xian, Yan-Fang; Ip, Siu-Po

    2014-03-15

    Previous studies in our laboratory have demonstrated that piperine produced antidepressant-like action in various mouse models of behavioral despair. This study aimed to investigate the role of brain-derived neurotrophic factor (BDNF) signalling in the antidepressant-like effect of piperine in mice exposed to chronic unpredictable mild stress (CUMS). The results showed that CUMS caused depression-like behavior in mice, as indicated by the significant decrease in sucrose consumption and increase in immobility time in the forced swim test. It was also found that BDNF protein expression in the hippocampus and frontal cortex were significantly decreased in CUMS-treated mice. Chronic treatment of piperine at the dose of 10mg/kg significantly ameliorated behavioural deficits of CUMS-treated mice in the sucrose preference test and forced swim test. Piperine treatment also significantly decreased immobility time in the forced swim test in naive mice. In parallel, chronic piperine treatment significantly increased BDNF protein expression in the hippocampus and frontal cortex of both naive and CUMS-treated mice. In addition, inhibition of BDNF signalling by injection of K252a, an inhibitor of the BDNF receptor TrkB, significantly blocked the antidepressant-like effect of piperine in the sucrose preference test and forced swim test of CUMS-treated mice. Taken together, this study suggests that BDNF signalling is an essential mediator for the antidepressant-like effect of piperine.

  15. [Antidepressant effects of the extract of Dendrobium nobile Lindl on chronic unpredictable mild stress-induced depressive mice].

    Science.gov (United States)

    Jiang, Ning; Fan, Lin-Xi; Yang, Yu-Jie; Liu, Xin-Min; Lin, Hai-Ying; Gao, Li; Wang, Qiong

    2017-04-25

    To investigate whether the extract of Dendrobium nobile Lindl (DNL) has an antidepressant effect on chronic unpredictable mild stress (CUMS)-induced depressive mice, 72 BALB/c male mice were randomly divided into the control group, the CUMS model group, the extract of DNL groups (50, 100 and 200 mg/kg DNL, i.g.) and the paroxetine group (10 mg/kg, i.g.). The different doses of DNL or the paroxetine was administered orally once daily to CUMS mice for 8 weeks (containing two-week preventive medication before the modeling). The same volume of distilled water was given to the control group and the CUMS group. Except for the control group, the other mice were exposed to chronic stress for 35 days. Behavioral tests were performed by using the sucrose preference test (SPT), the novelty-suppressed feeding (NSF) test, the tail suspension test (TST), and the forced swim test (FST). The levels of dopamine (DA) and 5-hydroxytryptamine (5-HT) were measured by the liquid chromatography-mass spectrometer (LC-MS)/MS. Compared with the control group, obvious behavioral changes were observed in the CUMS group after 5-week CUMS, including a decrease in the sucrose consumption, an increase in the latency to feeding in the NSF test and a prolongation of the immobility time in the TST. Compared with the CUMS group, the application of DNL resulted in a dose-dependent increase in sucrose consumption (P 0.05). In addition, in the hippocampus and cortex, the levels of 5-HT and DA were significantly decreased in the CUMS group compared with the control group (P < 0.05). In comparison with the CUMS group, paroxetine obviously increased the DA levels in the hippocampus and the cortex and the 5-HT level in the hippocampus (P < 0.05). DNL (50 and 200 mg/kg) significantly increased the DA level in cerebral cortex of the brain, and DNL (100 and 200 mg/kg) increased the DA level in the hippocampus. The 5-HT level in the 200 mg/kg DNL group was notably increased in both two brain regions (P < 0

  16. Bully Prevention: Creating Safe and Inclusive Environments for Youth

    Directory of Open Access Journals (Sweden)

    Kimberly Allen

    2012-09-01

    Full Text Available Bullying is a major issue facing youth of all ages, backgrounds, and walks of life. In fact, 30% of youth report experiencing bullying on a monthly basis (Nansel, Overpeck, Pilla, Ruan, Simons-Murton & Scheidt, 2001. As a consequence, these youth are at much greater risk for a host of mental and physical problems (Ttofi & Farrington, 2008. Parents, teachers, educators and youth advocates all agree that this issue merits time and attention, yet many professionals are at a loss for understanding the issue or what resources might be most effective with their young audience. With the increased rates of bullying behaviors and growing research about effective prevention and intervention strategies, youth development professionals need guidance for creating and sustaining bully prevention efforts. The purpose of this article is to highlight the growing research on bully prevention and provide information for practitioners working to create safe and inclusive environments for youth.

  17. Effect of fluoxetine and resveratrol on testicular functions and oxidative stress in a rat model of chronic mild stress-induced depression.

    Science.gov (United States)

    Sakr, H F; Abbas, A M; Elsamanoudy, A Z; Ghoneim, F M

    2015-08-01

    Our objective was to investigate the effects of chronic unpredictable mild stress (CUMS) with or without selective serotonin reuptake inhibitor (fluoxetine) and anti-oxidant (resveratrol) on testicular functions and oxidative stress in rats. Fifty male rats were divided into 2 groups; control and CUMS. CUMS group was further subdivided into 4 subgroups administered water, fluoxetine, resveratrol and both. Sucrose intake, body weight gain, serum corticosterone, serotonin and testosterone levels, sperm count and motility, testicular malondialdehyde, superoxide dismutase (SOD), catalase, glutathione (GSH), and gene expression of steroidogenic acute-regulatory (StAR) protein and cytochrome P450 side chain cleavage (P450scc) enzyme were evaluated. CUMS decreased sucrose intake, weight gain, anti-oxidants (SOD, catalase, GSH), testosterone, serotonin, StAR and cytochrome P450scc gene expression, sperm count and motility and increased malondialdehyde and corticosterone. Fluoxetine increased malondialdehyde, sucrose intake, weight gain, serotonin and decreased anti-oxidants, StAR and cytochrome P450scc gene expression, sperm count and motility, testosterone, corticosterone in stressed rats. Administration of resveratrol increased anti-oxidants, sucrose intake, weight gain, serotonin, StAR and cytochrome P450scc gene expression, testosterone, sperm count and motility, and decreased malondialdehyde and corticosterone in stressed rats with or without fluoxetine. In conclusion, CUMS induces testicular dysfunctions and oxidative stress. While treatment of CUMS rats with fluoxetine decreases the depressive behavior, it causes further worsening of testicular dysfunctions and oxidative stress. Administration of resveratrol improves testicular dysfunctions and oxidative stress that are caused by CUMS and further worsened by fluoxetine treatment.

  18. Cumene hydroperoxide debilitates macrophage physiology by inducing oxidative stress: possible protection by alpha-tocopherol.

    Science.gov (United States)

    Kaur, Gurpreet; Alam, M Sarwar; Athar, Mohammad

    2009-05-15

    Macrophages, the major phagocytes of body, are largely dependent on membrane for their apposite functioning. Cum-OOH, a catalyst used in chemical and pharmaceutical industry, is a peroxidative agent, which may induce oxidative stress in macrophages hampering the integrity of their membrane. Alpha-tocopherol is known to protect the membrane from oxidative modulation and preserve its integrity. In the present study, we investigated the effect of Cum-OOH on physiology of macrophages and evaluated the protective effect of alpha-tocopherol against Cum-OOH-induced functional impairment. An in vitro exposure to 10-200 microM Cum-OOH altered redox balance of murine peritoneal macrophages and led to a severe physiological impairment. It markedly augmented the release of proinflammatory cytokines (tumor necrosis factor-alpha, interleukin-1beta and prostaglandin E(2)), lipopolysaccharide primed nitric oxide release and inducible nitric oxide synthase expression, and lysosomal hydrolases secretion. It mitigated respiratory burst and phagocytosis and intracellular killing of yeast (Saccharomyces cerevisiae). Mannose receptor, a major macrophage phagocytic receptor (also implicated in S. cerevisiae phagocytosis), exhibited a hampered recycling with its number being reduced to about 54% of the untreated, control cells following Cum-OOH exposure. A 24-h pretreatment of macrophages with 25 microM alpha-tocopherol preserved most of the assessed functions close to their corresponding control values. These data suggest that exposure to Cum-OOH may impair the physiology of immune cells such as macrophages and that supplementation with alpha-tocopherol can safeguard these cells against Cum-OOH toxicity.

  19. Chronic Unpredictable Mild Stress Induces Loss of GABA Inhibition in Corticotrophin-Releasing Hormone-Expressing Neurons through NKCC1 Upregulation.

    Science.gov (United States)

    Gao, Yonggang; Zhou, Jing-Jing; Zhu, Yun; Kosten, Therese; Li, De-Pei

    2017-01-01

    Prolonged and repeated stresses cause hyperactivity of the hypothalamic-pituitary-adrenal (HPA) axis. The corticotrophin-releasing hormone (CRH)-expressing neurons in the hypothalamic paraventricular nucleus (PVN) are an essential component of the HPA axis. Chronic unpredictable mild stress (CUMS) was induced in Sprague-Dawley rats. GABA reversal potentials (EGABA) were determined by using gramicidin-perforated recordings in identified PVN-CRH neurons through expressing enhanced green fluorescent protein driven by the CRH promoter. Plasma corticosterone (CORT) levels were measured in rats implanted with a cannula targeting the lateral ventricles and PVN. Blocking the GABAA receptor in the PVN with gabazine significantly increased plasma CORT levels in unstressed rats but did not change CORT levels in CUMS rats. CUMS caused a depolarizing shift in EGABA in PVN-CRH neurons compared with EGABA in PVN-CRH neurons in unstressed rats. Furthermore, CUMS induced a long-lasting increase in expression levels of the cation chloride cotransporter Na+-K+-Cl--Cl- (NKCC1) in the PVN but a transient decrease in expression levels of K+-Cl--Cl- in the PVN, which returned to the basal level 5 days after CUMS treatment. The NKCC1 inhibitor bumetanide decreased the basal firing activity of PVN-CRH neurons and normalized EGABA and the gabazine-induced excitatory effect on PVN-CRH neurons in CUMS rats. In addition, central administration of bumetanide decreased basal circulating CORT levels in CUMS rats. These data suggest that chronic stress impairs GABAergic inhibition, resulting in HPA axis hyperactivity through upregulation of NKCC1. © 2016 S. Karger AG, Basel.

  20. Genipin is active via modulating monoaminergic transmission and levels of brain-derived neurotrophic factor (BDNF) in rat model of depression.

    Science.gov (United States)

    Wang, Q-S; Tian, J-S; Cui, Y-L; Gao, S

    2014-09-05

    Genipin, an important bioactive component from Gardenia jasminoides Eills, was demonstrated to possess antidepressant-like effects in a previous study. However, the molecular mechanism of antidepressant-like effects on genipin was not clear. The present study aimed to investigate the possible mechanism of antidepressant-like effects on genipin with a chronic unpredictable mild stress (CUMS)-induced depression model in rats. In CUMS-induced depressive rats, bodyweight and 1% sucrose consumption decreased significantly compared with the normal control group. Furthermore, these changes could be significantly reversed by genipin application. The levels of 5-hydroxytryptamine (5-HT), norepinephrine (NE) in the hippocampus decreased and the level of 5-hydroxyindole acetic acid (5-HIAA) increased in the CUMS-induced depressive rats. However, pre-treatments with genipin significantly increased the levels of 5-HT, NE and decreased the level of 5-HIAA in the hippocampus. The concentration of cAMP in the hippocampus was increased by genipin compared to the CUMS-exposed model group. The mRNA expressions of 5-hydroxytryptamine 1A receptor (5-HT1AR), cAMP response element binding protein (CREB) and brain-derived neurotrophic factor (BDNF) in rats were decreased exposed to CUMS, which were reversed by genipin-treated rats exposed to CUMS. Compared to the CUMS-exposed model group, the mRNA expression of 5-hydroxytryptamine 2A receptor (5-HT(2A)R) was decreased significantly by genipin-treated rats. The mRNA and protein expression of CREB, BDNF were increased in genipin-treated rats compared to the CUMS-exposed model group. Moreover, the levels of corticosterone in serum were decreased by genipin-treated compared to the CUMS-exposed model group. These results suggest that the possible mechanism of antidepressant-like effects on genipin, at least in one part, resulted from monoaminergic neurotransmitter system and the potential dysfunctional regulation of the post-receptor signaling

  1. Effects of cumene hydroperoxide on adenosine diphosphate ribosyl transferase in mononuclear leukocytes of patients with adenomatous polyps in the colon.

    Science.gov (United States)

    Markowitz, M M; Johnson, D B; Pero, R W; Winawer, S J; Miller, D G

    1988-03-01

    We have studied the effects of plasma and of cumene hydroperoxide (CUM) on adenosine diphosphate ribosyl transferase (ADPRT) from mononuclear leukocytes (HML) of patients with colonic adenomatous polyps (n = 22), with colonic hyperplastic polyps (n = 5) and with neither type of polyp (controls) (n = 6). ADPRT was measured after incubation of HML with plasma alone (termed the plasma value), and with plasma plus CUM (50 microM) (the activated value); the difference elicited by CUM was termed the induced value. There was no significant difference in values between the control and hyperplastic polyp groups: these were combined for further analysis. The plasma (P = 0.038), activated (P = 0.009) and induced (P = 0.0024) values of the combined group all differed significantly from those of the adenoma group. At low exposures, CUM stimulated both ADPRT and unscheduled DNA synthesis and, at higher exposures, inactivated both. Pretreatment of HML with vitamin E protected against these effects of CUM, while pretreatment with diamide (which depletes GSH) accentuated the effects. This study demonstrates a differential reaction of ADPRT in patients harboring colonic adenomas and suggests that the origin of this difference may lie in cellular responses to oxidative stress.

  2. Hyperhomocysteinemia is a result, rather than a cause, of depression under chronic stress.

    Directory of Open Access Journals (Sweden)

    Shen Chengfeng

    Full Text Available BACKGROUND: Although the accumulation of homocysteine (Hcy has been implicated in the pathogenesis of depression, whether Hcy is directly involved and acts as the primary cause of depressive symptoms remains unclear. The present study was designed to clarify whether increased Hcy plays an important role in stress-induced depression. RESULTS: We employed the chronic unpredictable mild stress model (CUMS of depression for 8 weeks to observe changes in the plasma Hcy level in the development of depression. The results showed that Wistar rats exposed to a series of mild, unpredictable stressors for 4 weeks displayed depression-like symptoms such as anhedonia (decreased sucrose preferences and a decreased 5-Hydroxy Tryptophan (5-HT concentration in the hippocampus. At the end of 8 weeks, the plasma Hcy level increased in the CUMS rats. The anti-depressant sertraline could decrease the plasma Hcy level and improve the depression-like symptoms in the CUMS rats. RhBHMT, an Hcy metabolic enzyme, could decrease the plasma Hcy level significantly, although it could not improve the depressive symptoms in the CUMS rats. CONCLUSIONS: The results obtained from the experiments did not support the hypothesis that the increased Hcy concentration mediated the provocation of depression in CUMS rats, and the findings suggested that the increased Hcy concentration in the plasma might be the result of stress-induced depression.

  3. The improvement effect of TREK-1 potassium channel blockade on the behavior of depression model rats%TREK-1钾通道拮抗剂对抑郁模型大鼠行为学改善的影响

    Institute of Scientific and Technical Information of China (English)

    徐华; 祁鑫洋; 王立平; 张志珺

    2016-01-01

    Objective To study the effect of TREK-1 potassium channel blocker on the behavior in rats with depression.Methods Forty-eight healthy adult male Sprague Dawley (SD) rats were divided into 6 groups as following:control + saline (CON group),control + fluoxetine (CON + FLU group),control + SID1900 (CON+SID group),CUMS + saline (CUMS group),CUMS + fluoxetine (CUMS+FLU group) and CUMS + SID1900 (CUMS+SID group) with 8 in each group.Isolated living conditions combining chronic unpredicted mild stress (CUMS) were used to establish depression model in rats.Four weeks after modeling,fluoxetine 10 mg· kg-1,SID1900 5.1 mg · kg-1 and 0.9% sodium chloride were given by intraperitoneal injection respectively.Body weight and behavioral performance of rats in several experiment paradigms were measured after drug administration.The behavioral paradigms included sucrose preference test(SPT),open field test(OFT) and forced swimming test(FST).Results Drug administration had no significant effect on body weight and behavioral performance in non stress rats (P>0.05),however,after chronic unpredicted mild stress the body weight,percentage of sucrose consumption,movement distances and rearing times in CUMS group were decreased dramatically contrast to CON group,but the immobility duration was increased significantly (all P<0.001).After treatment with drug for 14 days,the sucrose consumption percentage(62.03± 6.99) %) and rearing times (18.57 ± 6.37) in CUMS+SID group were increased contrast to C UMS group ((45.46± 15.54) %,(5.83±3.06)),while the immobility time((123.57±26.73) s) was decreased compared with that in CUMS group((174.33±40.68) s).When drug administration for 28 days,the sucrose consumption percentage((79.64± 11.37) %),the total distance as well as the rearing times ((13.18 ± 3.17) m,(19.33±3.33)) within OFT in CUMS+FLU group were increased in comparison with CUMS group((48.06± 17.10) %,(4.45±3.69) m,(5.17± 2.99)),and the immobility duration ((97

  4. Exact Solution for Phenomenon of atomic Collapse and Revival under Rotating Wave and Anti-Rotating Wave Approximation

    Institute of Scientific and Technical Information of China (English)

    DING Bang-Fu; WANG Xiao-Yun; TANG Yan-Fang; MI Xian-Wu; ZHAO He-Ping

    2011-01-01

    An accurate method to solve the Jaynes-Cummings (J-C) Hamiltonian has been investigated here. The phenomenon of atomic collapse and revival predicted by Jaynes-Cummings model is demonstrated. Solutions are consistent with the precious such as using the operator method. Furthermore, the Jaynes-Cummings Hamiltonian including the anti-rotating term is also solved precisely using this accurate way so that results agree with experiments better.Essences of the anti-rotating term are revealed. We discuss the relations of the phenomenon of atonic collapse and revival with the average photons number, the light field phase angle, the resonant frequency, and the size of coupling constant. The discussions may make one select suitable conditions to carry out experiment well and study the virtual light field effect on cavity quantum electrodynamics.

  5. Non-equilibrium many-body effects in driven nonlinear resonator arrays

    CERN Document Server

    Grujic, T; Angelakis, D G; Jaksch, D

    2012-01-01

    We study the non-equilibrium behavior of optically driven dissipative coupled resonator arrays. Assuming each resonator is coupled with a two-level system via a Jaynes-Cummings interaction, we calculate the many-body steady state behavior of the system under coherent pumping and dissipation. We propose and analyze the many-body phases using experimentally accessible quantities such as the total excitation number, the emitted photon spectra and photon coherence functions for different parameter regimes. In parallel, we also compare and contrast the expected behavior of this system assuming the local nonlinearity in the cavities is generated by a generic Kerr effect rather than a Jaynes-Cummings interaction. We find that the behavior of the experimentally accessible observables produced by the two models differs for realistic regimes of interactions even when the corresponding nonlinearities are of similar strength. We analyze in detail the extra features available in the Jaynes-Cummings-Hubbard (JCH) model ori...

  6. Quantum Harmonic Oscillator State Control in a Squeezed Fock Basis

    Science.gov (United States)

    Kienzler, D.; Lo, H.-Y.; Negnevitsky, V.; Flühmann, C.; Marinelli, M.; Home, J. P.

    2017-07-01

    We demonstrate control of a trapped-ion quantum harmonic oscillator in a squeezed Fock state basis, using engineered Hamiltonians analogous to the Jaynes-Cummings and anti-Jaynes-Cummings forms. We demonstrate that for squeezed Fock states with low n the engineered Hamiltonians reproduce the √{n } scaling of the matrix elements which is typical of Jaynes-Cummings physics, and also examine deviations due to the finite wavelength of our control fields. Starting from a squeezed vacuum state, we apply sequences of alternating transfer pulses which allow us to climb the squeezed Fock state ladder, creating states up to excitations of n =6 with up to 8.7 dB of squeezing, as well as demonstrating superpositions of these states. These techniques offer access to new sets of states of the harmonic oscillator which may be applicable for precision metrology or quantum information science.

  7. Study of C57 mice depression model induced by chronic stress and separation%慢性应激联合孤养C57小鼠抑郁模型的研究

    Institute of Scientific and Technical Information of China (English)

    姚丽华; 陈建新; 王晓萍; 王惠玲; 王高华; 刘忠纯

    2014-01-01

    目的 探讨C57小鼠慢性不可预见性温和应激(chronic unpredictable mild stress,GUMS)联合孤养建立抑郁模型的可行性和有效性.方法 将30只雄性C57小鼠随机分为CUMS+孤养组、CUMS+孤养+氟西汀组、对照组各10只,前两组CUMS+孤养致抑郁模型3周,3周后对CUMS+孤养+氟西汀组进行氟西汀干预,观察小鼠应激前、应激后及干预后的摄食量/体质量、旷场实验和液体消耗实验变化.结果 与对照组比较,建模21d后CUMS+孤养组和CUMS+孤养+氟西汀组小鼠摄食量/体质量、糖水偏好、旷场总行程显著下降(P<0.05);经氟西汀干预14 d后摄食量/体质量、旷场总行程与对照组比较无明显差异(P>0.05),但糖水消耗量明显提高(P<0.05),与CUMS+孤养组比较也有明显改善(P<0.05).结论 C57小鼠CUMS联合孤养制作抑郁模型的效果肯定,是研究抑郁症较为理想的动物模型.%Objective To investigate the feasibility and effectiveness of C57 mice depression model established by chronic unpredictable mild stress (CUMS) and separation.Methods 30 male C57 mice were randomly divided into three groups:CUMS + separation group (group CS),CUMS + separation + fluoxetine group (group CSF),and control group (group C).The mice of group CS and group CSF were fed with chronic unpredictable mild stress (CUMS) and separation for 3 weeks.Then,the mice of group CSF were given fluoxetine.To record the food intake/body weight,liquid consumption and field test of the mice at relevant time point.Results Compared with control group,the food intake/body weight,total route in the field test,and the sucrose solution consumption in liquid consumption test of group CS and group CSF decreased significantly (P<0.05) at the 21th days.But after giving fluoxetine for 14 days,group CSF had no significant differences with group C except sucrose solution consumption.Although the difference of sucrose solution preferences was significant compared with

  8. Time-resolved kinetic study of the electron-transfer reactions between ring-substituted cumyloxyl radicals and alkylferrocenes. Evidence for an inner-sphere mechanism.

    Science.gov (United States)

    Bietti, Massimo; DiLabio, Gino A; Lanzalunga, Osvaldo; Salamone, Michela

    2011-03-18

    A time-resolved kinetic study of the reactions of ring-substituted cumyloxyl radicals (4-X-CumO(•): X = OMe, t-Bu, Me, Cl, CF(3)) with methylferrocenes (Me(n)Fc: n = 2, 8, 10) has been carried out in acetonitrile solution. Evidence for an electron transfer (ET) process has been obtained for all radicals and an increase in reactivity has been observed on decreasing the oxidation potential of the ferrocene donor and on going from electron-releasing to electron-withdrawing ring substituents. Computations predict the formation of strongly bound π-stacked 4-X-CumO(•)/DcMFc complexes, characterized by intracomplex π-π distances around 4 Å. These findings point toward a (nonbonded) inner-sphere ET mechanism for the reactions of the 4-X-CumO(•)/Me(n)Fc couples.

  9. Emergent Properties Delineate Marine Ecosystem Perturbation and Recovery.

    Science.gov (United States)

    Link, Jason S; Pranovi, Fabio; Libralato, Simone; Coll, Marta; Christensen, Villy; Solidoro, Cosimo; Fulton, Elizabeth A

    2015-11-01

    Whether there are common and emergent patterns from marine ecosystems remains an important question because marine ecosystems provide billions of dollars of ecosystem services to the global community, but face many perturbations with significant consequences. Here, we develop cumulative trophic patterns for marine ecosystems, featuring sigmoidal cumulative biomass (cumB)-trophic level (TL) and 'hockey-stick' production (cumP)-cumB curves. The patterns have a trophodynamic theoretical basis and capitalize on emergent, fundamental, and invariant features of marine ecosystems. These patterns have strong global support, being observed in over 120 marine ecosystems. Parameters from these curves elucidate the direction and magnitude of marine ecosystem perturbation or recovery; if biomass and productivity can be monitored effectively over time, such relations may prove to be broadly useful. Curve parameters are proposed as possible ecosystem thresholds, perhaps to better manage the marine ecosystems of the world. Published by Elsevier Ltd.

  10. Analysis of cumene (isopropylbenzene) degradation genes from Pseudomonas fluorescens IP01.

    Science.gov (United States)

    Habe, H; Kasuga, K; Nojiri, H; Yamane, H; Omori, T

    1996-12-01

    We obtained the DNA fragments encoding 2-hydroxy-6-oxo-7-methylocta-2,4-dienoic acid (HOMODA) hydrolase in the cumene (isopropylbenzene) degrader Pseudomonas fluorescens strain IP01 via PCR using two synthesized oligonucleotides corresponding to the conserved regions within known meta-cleavage compound hydrolases. Following colony hybridization using the amplified DNA as a probe, a 4.5-kb HindIII fragment was isolated from P. fluorescens IP01. After determining the nucleotide sequence of this fragment, three open reading frames (ORF11 [cumH], ORF12 [cumD], and ORF13) were identified. The deduced amino acid sequence of ORF12 showed homology with meta-cleavage compound hydrolases encoded by the tod, dmp, xyl, and bph operons. Although the product of ORF12 was found to exhibit HOMODA and 2-hydroxy-6-oxohepta-2,4-dienoic acid (HOHDA) hydrolase activities, it did not exhibit 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acid (HOPDA) hydrolase activity. The deduced amino acid sequence of ORF11 showed 40.4% homology with the sequence of todX in Pseudomonas putida F1 (Y. Wang, M. Ralings, D. T. Gibson, D. Labbé, H. Bergeron, R. Brousseau, and P. C. K. Lau, Mol. Gen. Genet. 246:570-579, 1995). The nucleotide sequence of ORF13 and its flanking region showed strong homology (91.0%) with IS52 from Pseudomonas savastanoi (Y. Yamada, P.-D. Lee, and T. Kosuge, Proc. Natl. Acad. Sci. USA 83:8263-8267, 1982). By characterization of cumH and cumD, the entire cum gene cluster from the cumene-degrader P. fluorescens IP01 (cumA1A2A3A4BCEGFHD) has been identified.

  11. Chronic ultra-mild stress improves locomotor performance of B6D2F1 mice in a motor risk situation.

    Science.gov (United States)

    Negroni, Julia; Venault, Patrice; Pardon, Marie Christine; Pérez-Diaz, Fernando; Chapouthier, Georges; Cohen-Salmon, Charles

    2004-12-06

    Chronic low grade stress predispose to psychopathological disorders. We consistently showed that chronic ultra-mild stress (CUMS) applied to B6D2F1 female mice induced behavioral disinhibition in several conflict exploration models. Insufficient reactivity to conflicts may be maladaptive and lead to inappropriate appreciation of potential risks and impaired ability to cope with those. Therefore, the purpose of the study was to assess the effect of a CUMS procedure on the behavior of mice in a motor risk situation based on multisensory conflict. Following three weeks exposure to various mild stressors, stressed and control B6D2F1 mice were tested on the rotating beam to determine how CUMS exposure affected balance control, posture stability and locomotor performance in response to a sensory-motor challenge. Detailed behavioral analysis included several parameters, both postural (height of the trunk, tail angle, number of imbalances, falls and head movements) and kinetic (mean velocity on the beam, distance covered with large and small movements, plus time spent in no-motion episodes). Comparisons between control and stressed mice showed that CUMS exposure increased mean velocity and improved locomotor performance in the learning task. In addition, sensitivity to sensory conflict seemed to be reduced in stressed mice, which displayed fewer behavioral adjustments to the increasing difficulty of the test compared to control mice. The results are discussed in terms of the possible influence of disturbances in behavioral and attentional inhibitory processes following CUMS exposure. Whether longer periods of CUMS exposure would shift the performance on the RTB from improvement to deterioration remain to be established.

  12. Exposure to phthalates in 5-6 years old primary school starters in Germany--a human biomonitoring study and a cumulative risk assessment.

    Science.gov (United States)

    Koch, Holger M; Wittassek, Matthias; Brüning, Thomas; Angerer, Jürgen; Heudorf, Ursel

    2011-06-01

    We determined the internal exposure of 111 German primary school starters by analyzing urinary metabolites of six phthalates: butyl benzyl phthalate (BBzP), di-iso-butyl phthalate (DiBP), di-n-butyl phthalate (DnBP), di (2-ethylhexyl) phthalate (DEHP), di-iso-nonyl phthalate (DiNP) and di-iso-decylphthalate (DiDP). From the urinary metabolite levels, we calculated daily intakes and related these values to Tolerable Daily Intake (TDI) values. By introducing the concept of a relative cumulative Tolerable Daily Intake (TDI(cum)) value, we tried to account for the cumulative exposure to several of the above-mentioned phthalates. The TDI(cum) was derived as follows: the daily intake (DI) calculated from the metabolite level was divided by the TDI for each phthalate; this ratio was multiplied by 100% indicating the TDI percentage for which the DI accounted. Finally the % TDIs of the different phthalates were totalled to get the TDI(cum). A TDI(cum) above 100% is a potential cause for concern. We confirmed the ubiquitous exposure of the children to all phthalates investigated. Exposures were within range of levels previously reported for GerES, albeit slightly lower. Regarding daily intakes, two children exceeded the TDI for DnBP, whereas one child closely approached the TDI for DEHP. 24% of the children exceeded the TDI(cum) for the three most critical phthalates: DEHP, DnBP and DiBP. Furthermore, 54% of the children had total exposures that used up more than 50% the TDI(cum). Therefore, the overall exposure to a number of phthalates, and the knowledge that these phthalates (and other anti-androgens) act in a dose-additive manner, urgently warrants a cumulative risk assessment approach.

  13. Comparison of the Job Satisfaction of Aircraft and Munitions Maintenance Officers in Centralized and Decentralized Maintenance Organizations.

    Science.gov (United States)

    1985-09-01

    Cummings As shown in Figure 5, Victor H . Vroom de\\-eloped the expectancy theory to explain how behavior can lead to desired rewards (25:405). The central...OF SYST R J WILL IAMS UULASIFIED SEP 85 AFIT/GLM/LSM/85S-82 F/G 5/9 IA.E EE0 0 IEEI IEIoE L EEEEME~ h IL 1-.- .2 "II0 i 11’i 1I 11111 2.0 MICROCOPY...20 Other Major Studies on Job Satisfaction. 24 Vroom , Galbraith, and Cummings ....... ... 27 Thesis Findings . ............ 30 Air Force

  14. Comparing the Nordic and South Korean Models: Labour-Market Regulation and Social Welfare in Times of Crisis

    DEFF Research Database (Denmark)

    Schmidt, Johannes Dragsbæk

    2012-01-01

    The first part of the paper briefly describes the causes and impacts of the US induced financial crisis cum “Great Depression”. The second part discusses the status of the various models of contemporary capitalism – the discredited Anglo-Saxon finance-driven model versus the export-driven product......The first part of the paper briefly describes the causes and impacts of the US induced financial crisis cum “Great Depression”. The second part discusses the status of the various models of contemporary capitalism – the discredited Anglo-Saxon finance-driven model versus the export...

  15. A utilidade da cintigrafia com DMSA e da ecografia renal na identificação de crianças com primeiro episódio de infecção urinária febril que beneficiam ou não da realização de cistografia miccional

    OpenAIRE

    Rebelo, Joana; Miguel, Cristina de; Teixeira, Paulo

    2014-01-01

    Introdução: Numa infecção do tracto urinário (ITU) febril inaugural, a ecografia renal (Eco), a cintigrafia com 99mTc-ácido dimercaptosuccínico (DMSA) e a cistouretrografia miccional seriada (CUMS) são habitualmente realizadas, em crianças pequenas, para identificar risco aumentado de recorrência e consequentes cicatrizes renais. A CUMS, exame invasivo envolvendo radiação, permite o diagnóstico definitivo de refluxo vesicoureteral (RVU).Objectivos: Determinar se a DMSA ou a DMSA e a Eco (abor...

  16. Influence on Atomic Inversion Evolution in Medium System from Compton Scattering

    Institute of Scientific and Technical Information of China (English)

    HAO Xiao-fei; HAO Dong-shan

    2008-01-01

    In Jaynes-Cummings model, by using the modulation of the coupling coefficient formed by the atom, medium and scattering optical, atomic inversion evolution of arbitrary forms has been worked out. Its feasibility has been proved, and the curvature of the atomic inversion evolution of the arbitrary forms is obtained. It announces that the atom and coupling medium system are to express the operators of the atom and optical field quantum in Jaynes-Cummings model. These operators can express arbitrary medium system. In these systems, the coupling coefficient can be changed and exactly controlled in the longer coherent times.

  17. 抑郁模型大鼠再应激后海马细胞支架蛋白的改变%Cytoskeletal alterations in rat hippocampus following chronic unpredictable mild stress and re-exposure to acute and chronic unpredictable mild stress

    Institute of Scientific and Technical Information of China (English)

    杨灿; 王高华; 王惠玲; 刘忠纯; 王晓萍; 朱志先

    2011-01-01

    目的 研究抑郁模型大鼠接受再次急性和慢性应激后细胞支架微管系统的动态性改变,并探讨可能的机制.方法 将40只大鼠按随机数字表法分为5组:对照组(空白对照+生理盐水),CUMS组(CUMS+生理盐水),氟西汀组(CUMS+氟西汀),急性再应激组(CUMS+氟西汀+药物清洗期+急性游泳应激),CUMS再应激组(CUMS+氟西汀+药物清洗期+CUMS).实验结束后进行行为学观察,并使用免疫印迹法( western blotting)检测大鼠海马乙酰化微管蛋白(Acet-Tub),酪氨酸化微管蛋白(Tyr-Tub),微管结合蛋白2(MAP-2)及磷酸化微管结合蛋白2(phospho-MAP-2).结果 (1)CUMS再应激组糖水偏好[ (43.38±7.84)%],总行程[(859.21±653.62)cm],运动平均速度[(2.05±0.60)cm/s]及直立次数[(0.12±0.30)次]均减少,与对照组及CUMS组相比均差异有显著性(P<0.01).急性再应激组行为与对照组比较差异无显著性.氟西汀组糖水偏好和旷场实验相关指标与对照组差异无显著性,与CUMS组差异有显著性(P<0.01).(2) CUMS再应激组Acet-Tub表达升高[(244.24±8.90)%],Tyr-Tub表达降低[ (30.92±11.00)%],与对照组及CUMS组差异均有显著性(P<0.01).MAP-2的表达与对照组及CUMS组比较差异无显著性,phospho-M AP-2的表达减少[(24.75±8.83)%],与对照组及CUMS组均差异有显著性(P<0.01).急性再应激组各蛋白水平与对照组比较差异无显著性.氟西汀组各蛋白的表达与对照组比较差异无显著性(P>0.05),与CUMS组比较差异有显著性(P<0.01).结论 动物再次暴露于CUMS后,其行为和微管动态性损害更严重,同时伴随微管相关蛋白磷酸化的变化,提示临床抑郁症的发生以及复发的町能机制.%Objective To investigate behavior and hippocampal cytoskeletal alterations following re-exposure to chronic unpredictable mild stress(CUMS) and acute swimming stress,and explore the possible mechanism.Methods 40 Male Sprague-Dawley (SD) rats were

  18. Strong-driving-assisted multipartite entanglement in cavity QED.

    Science.gov (United States)

    Solano, E; Agarwal, G S; Walther, H

    2003-01-17

    We propose a method of generating multipartite entanglement by considering the interaction of a system of N two-level atoms in a cavity of high quality factor with a strong classical driving field. It is shown that, with a judicious choice of the cavity detuning and the applied coherent field detuning, vacuum Rabi coupling produces a large number of important multipartite entangled states. It is even possible to produce entangled states involving different cavity modes. Tuning of parameters also permits us to switch from Jaynes-Cummings to anti-Jaynes-Cummings-like interaction.

  19. Strong driving assisted multipartite entanglement in cavity QED

    CERN Document Server

    Solano, E; Walther, H

    2003-01-01

    We propose a method for generating multipartite entanglement by considering the interaction of a system of N two-level atoms in a cavity of high quality factor with a strong classical driving field. We show that when a judicious choice of the cavity detuning and the applied coherent field detuning is made, vacuum Rabi coupling produces a large number of important multipartite entangled states. We can even produce entangled states involving different cavity modes. Tuning of parameters also permit us to switch from Jaynes-Cummings like interaction to anti-Jaynes-Cummings like interaction.

  20. Cumulative Vehicle Routing Problems

    OpenAIRE

    Kara, &#;mdat; Kara, Bahar Yeti&#;; Yeti&#;, M. Kadri

    2008-01-01

    This paper proposes a new objective function and corresponding formulations for the vehicle routing problem. The new cost function defined as the product of the distance of the arc and the flow on that arc. We call a vehicle routing problem with this new objective function as the Cumulative Vehicle Routing Problem (CumVRP). Integer programming formulations with O(n2) binary variables and O(n2) constraints are developed for both collection and delivery cases. We show that the CumVRP is a gener...

  1. Position-dependent dynamics of a trapped ion in a standing wave laser

    Institute of Scientific and Technical Information of China (English)

    方卯发

    2002-01-01

    We have investigated the position-dependent dynamics of a trapped ion in a standing wave laser by transforming it to the Jaynes-Cummings-type system under the Lamb-Dicke limit. A variety of novel phenomena are exhibited,e.g. periodic collapse and revival features and long-time scaled revivals of the ionic inversion, depending on its position in the standing wave. Our result provides a way of producing a system equivalent to the two-photon Jaynes-Cummings model in the trapped ion system, with its exact periodicities.

  2. Foregrounded Beauty:A Brief Analysis of Cummings’Typical Poems from the Perspective of Stylistics

    Institute of Scientific and Technical Information of China (English)

    赵文荣

    2014-01-01

    E. E. Cummings is one of the representatives of American modern experimental poets whose poems are well-known for the unique style. Cummings endeavors to make his poems be different from other poets’. He broke the traditional way of writing poems, invented in the changing of lines of the poem and the spelling of the words in the poem, thus to make his personal poem style distinctive. Therefore, standing on the stylistic point of view, this paper makes a brief analysis on Cummings’typical poems from foregrounding perspective.

  3. The effect of repetitive transcranial magnetic stimulation on the changes of depressive like behaviors in chronic unpredictable mild stress model rats and its possible mechanism%重复经颅磁刺激对抑郁模型大鼠行为的改善作用及机制

    Institute of Scientific and Technical Information of China (English)

    刘高华; 陈冠婕; 陈怡环; 杨帆; 张瑞国; 彭正午; 谭庆荣

    2013-01-01

    Objective To investigate the effect of repetitive transcranial magnetic stimulation (rTMS) on the depressive like behaviors and expression of brain derived neurotrophic factor (BDNF),IL-1β and NF-κB of hippocampal in chronic unpredictable mild stress (CUMS) rats.Methods Thirty-two adult male rats were randomly divided into four groups (n =8):Control group,Control + rTMS group,CUMS group and CUMS + rTMS group.The sucrose preference test,forced swim test and open field test were used to evaluate depressive like behaviors for each groups.In addition,the expression of BDNF,NF-κB and IL-1 β in hippocampal were detected by western blot and ELISA after behavioral test,respectively.Results 1.The effects of rTMS on depressive like behaviors of CUMS rats:in the sucrose preference test,the sucrose preference rate of CUMS rats (0.67 ± 0.06) was significantly lower than Control group (0.91 ± 0.04),which was higher in the CUMS + rTMS group (0.83 ±0.08).In the forced swim test,the immobility time of CUMS group ((26.88 ± 11.33) s) was longer than Control group ((15.22 ± 6.75) s) and CUMS + rTMS group ((18.41 ± 6.95) s).In the open field test,both the total distance travelled and number of central area entry times of CUMS group((849.165 ± 769.01) cm,(7.42 ± 5.68))were significantly shorter ((6224.81 ± 1403.2) cm) and smaller (22.86 ± 3.72) than Control group,and those of the CUMS + rTMS were longer ((4105.57 ± 1516.92)cm) and larger (21.25 ± 3.45).All the behavioral results were statistically significant (P< 0.05).And of all the aforementioned behavioral parameters,there were no significant differences between Control group and Control + rTMS group(P>0.05).2.The effects of rTMS on the hippocampal expressions of BDNF,NF-κB and IL-1β in CUMS rats:compared with Control group,the hippocampal expression of BDNF in CUMS rats was significantly decreased,while the expressions of NF-κB and IL-1β in the hippocampus were significantly increased (P< 0.05).Compared

  4. 离子镀

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    SY509-3-85 [篇名] Adhesion improvements for diamond-like carbon films on polycarbonate and polymethylmethacrylate substrates by ion plating with inductively coupled plasma;SY509-3-86 [篇名] An expert system to support the optimization of ion plating process: an OLAP-based fuzzy-cum-GA approach;……

  5. KAPSE (Kernel ADA Programming Support Environment) Interface Team Public Report. Volume 5.

    Science.gov (United States)

    1985-08-01

    put together. It was admoledkjd that the i~mpct of the security madanism is less well-krm. 2. Mme is imzffdmt alendar tim fc pJlic review bsbmegn now...9Pe-s a nods handle, a cloes the nole handle, and c(um INTENT alters the specifimtion of the intention of nods handle ,uage. Thes interfae perfotm

  6. Airborne Ocean Surveys of the Loop Current Complex From NOAA WP-3D in Support of the Deepwater Horizon Oil Spill

    Science.gov (United States)

    2011-01-01

    subsurface. A NOAA research aircraft flew oceano - graphic survey missions to provide synoptic oceanic and atmospheric measurements to provide guidance to...developed as an oceano - graphic version of the Multi-Variate Optimum Interpolation (MVOI) [Cummings, 2005] technique widely used in oper- ational

  7. Computational Sensitivity Analysis for the Aerodynamic Design of Supersonic and Hypersonic Air Vehicles

    Science.gov (United States)

    2015-05-18

    surface would take the form of a three dimensional surface similar to those in undergraduate courses in multivariable calculus . Sensitivity Analysis...York, 2012, pp.844-850. [9] J. J. Bertin and R. M. Cummings, “Newtonian Flow Model,” Aerodynamics for Engineers, 6th ed., Pearson Education, Saddle

  8. Cavity quantum electrodynamics of a quantum dot in a micropillar cavity: comparison between experiment and theory

    DEFF Research Database (Denmark)

    Madsen, Kristian Høeg; Ates, Serkan; Reitzenstein, S.;

    2010-01-01

    The coupling between a quantum dot (QD) and a micropillar cavity is experimentally investigated by performing time-resolved, correlation, and two-photon interference measurements. The Jaynes-Cummings model including dissipative Lindblad terms and dephasing is analyzed, and all the parameters...... for the model are experimentally determined allowing for a complete comparison between experiment and theory....

  9. AcEST: BP917984 [AcEST

    Lifescience Database Archive (English)

    Full Text Available F+ Sbjct: 114 GKFYPAFMRKQKAQEFINLRM-GSMTISEYYSKFI 147 >tr|Q9AXC5|Q9AXC5_ANTHI Putative uncharacterized protein OS=Antirrhinum hispani...cum PE=4 SV=1 Length = 1299 Score = 36.6 bits (83), Expect = 0.75 Identities = 16/5

  10. Strafrechtelijke aansprakelijkheid heroverwogen : over opzet, schuld, schulduitsluitingsgronden en straf

    NARCIS (Netherlands)

    Dijk, Alwin Auke van

    2008-01-01

    In het proefschrift waarop jurist en psycholoog Alwin van Dijk, met als promotor mr. M. Otte, op 8 mei 2008 cum laude promoveerde, worden een aantal belangrijke strafrechtelijke thema’s (opzet; schuld; straf) besproken vanuit verschillende perspectieven (juridisch; filosofisch; psychologisch). De in

  11. Somatostatin and dopamine receptors as molecular targets for the medical treatment of Cushing’s disease

    NARCIS (Netherlands)

    C. de Bruin (Christiaan)

    2009-01-01

    textabstractHarvey Williams Cushing (1869-1939) was born as the 10th child of a well-educated, puritanical medical family in Cleveland (figure 1). He attended Yale University, graduated cum laude from Harvard Medical School and was trained as a general surgeon at Johns Hopkins under the famous but d

  12. Scalable synthesis of Cu-based ultrathin nanowire networks and their electrocatalytic properties

    Science.gov (United States)

    Hong, Wei; Wang, Jin; Wang, Erkang

    2016-02-01

    In this research, we developed an easy way to generate CuM (M = Pd, Pt and PdPt) ultrathin nanowire networks by simply injecting the metallic precursors into an aqueous solution which contained sodium borohydride under vigorous stirring. The reaction can be finished quickly without needing any other reagents, thus leaving the products with a clean surface. The prepared materials show an ultrathin diameter of less than 5 nanometers. The reaction can be easily amplified, resulting in scalable products. These properties combined with the superior catalytic performance of the prepared CuM nanowire networks underpin their potential use in glycerol electrooxidation reaction.In this research, we developed an easy way to generate CuM (M = Pd, Pt and PdPt) ultrathin nanowire networks by simply injecting the metallic precursors into an aqueous solution which contained sodium borohydride under vigorous stirring. The reaction can be finished quickly without needing any other reagents, thus leaving the products with a clean surface. The prepared materials show an ultrathin diameter of less than 5 nanometers. The reaction can be easily amplified, resulting in scalable products. These properties combined with the superior catalytic performance of the prepared CuM nanowire networks underpin their potential use in glycerol electrooxidation reaction. Electronic supplementary information (ESI) available: Experimental details, additional TEM, XPS and electrochemical characterizations. See DOI: 10.1039/c5nr07516e

  13. A 1H-NMR-Based Metabonomic Study on the Anti-Depressive Effect of the Total Alkaloid of Corydalis Rhizoma

    Directory of Open Access Journals (Sweden)

    Hongwei Wu

    2015-05-01

    Full Text Available Corydalis Rhizoma, named YuanHu in China, is the dried tuber of Corydalis yanhusuo W.T. Wang which is used in Traditional Chinese Medicine for pain relief and blood activation. Previous pharmacological studies showed that apart from analgesics, the alkaloids from YuanHu may be useful in the therapy of depression by acting on the GABA, dopamine and benzodiazepine receptors. In this study, the antidepressive effect of the total alkaloid of YuanHu (YHTA was investigated in a chronic unpredictable mild stress (CUMS rat model using 1H-NMR-based metabonomics. Plasma metabolic profiles were analyzed and multivariate data analysis was applied to discover the metabolic biomarkers in CUMS rats. Thirteen biomarkers of CUMS-introduced depression were identified, which are myo-inositol, glycerol, glycine, creatine, glutamine, glutamate, β-glucose, α-glucose, acetoacetate, 3-hydroxybutyrate, leucine and unsaturated lipids (L7, L9. Moreover, a metabolic network of the potential biomarkers in plasma perturbed by CUMS was detected. After YHTA treatment, clear separation between the model group and YHTA-treated group was achieved. The levels of all the abnormal metabolites mentioned above showed a tendency of restoration to normal levels. The results demonstrated the therapeutic efficacy of YHTA against depression and suggested that NMR-based metabolomics can provide a simple and easy tool for the evaluation of herbal therapeutics.

  14. Review of the book by Diego Silva Forné: Drogas y Derecho Penal en el Uruguay: tolerancia, prohibición, regulación. Evolución del derecho uruguayo, su doctrina y jurisprudencia. Análisis de la Ley de Regulación y Control del Mercado de la Marihuana

    Directory of Open Access Journals (Sweden)

    Mariana Malet Vázquez

    2017-04-01

    Full Text Available This study is the doctoral thesis under the direction of Prof. Dr. Maria Acale, Diego Silva defended earlier this year at the University of Cadiz in front of Spanish professors of the stature of Juan Terradillos, Juan Muñoz Sánchez and Juan Carlos Ferré Olivé, obtaining the qualification Summa cum laude, unanimously.

  15. Variability of African Farming Systems from Phenological Analysis of NDVI Time Series

    Science.gov (United States)

    Vrieling, Anton; deBeurs, K. M.; Brown, Molly E.

    2011-01-01

    Food security exists when people have access to sufficient, safe and nutritious food at all times to meet their dietary needs. The natural resource base is one of the many factors affecting food security. Its variability and decline creates problems for local food production. In this study we characterize for sub-Saharan Africa vegetation phenology and assess variability and trends of phenological indicators based on NDVI time series from 1982 to 2006. We focus on cumulated NDVI over the season (cumNDVI) which is a proxy for net primary productivity. Results are aggregated at the level of major farming systems, while determining also spatial variability within farming systems. High temporal variability of cumNDVI occurs in semiarid and subhumid regions. The results show a large area of positive cumNDVI trends between Senegal and South Sudan. These correspond to positive CRU rainfall trends found and relate to recovery after the 1980's droughts. We find significant negative cumNDVI trends near the south-coast of West Africa (Guinea coast) and in Tanzania. For each farming system, causes of change and variability are discussed based on available literature (Appendix A). Although food security comprises more than the local natural resource base, our results can perform an input for food security analysis by identifying zones of high variability or downward trends. Farming systems are found to be a useful level of analysis. Diversity and trends found within farming system boundaries underline that farming systems are dynamic.

  16. Apigenin ameliorates chronic mild stress-induced depressive behavior by inhibiting interleukin-1β production and NLRP3 inflammasome activation in the rat brain.

    Science.gov (United States)

    Li, Ruipeng; Wang, Xiangxiang; Qin, Tingting; Qu, Rong; Ma, Shiping

    2016-01-01

    Increasing evidence suggests that inflammation and oxidative stress may contribute to the development of major depressive disorder (MDD). Apigenin, a type of bioflavonoid widely found in citrus fruits, has a number of biological actions including anti-inflammatory and antioxidant effects. Although apigenin has potential antidepressant activity, the mechanisms of this effect remain unclear. The present study aims to investigate the effects of apigenin on behavioral changes and inflammatory responses induced by chronic unpredictable mild stress (CUMS) in rats. GW9662, a selective peroxisome proliferator-activated receptor gamma (PPARγ) inhibitor, was administered 30 min before apigenin. We found that treatment with apigenin (20mg/kg, intragastrically) for three weeks remarkably ameliorated CUMS-induced behavioral abnormalities, such as decreased locomotor activity and reduced sucrose consumption. In response to oxidative stress, the NLRP3 inflammasome was activated and IL-1β secretion increased in the prefrontal cortex (PFC) of CUMS rats. However, apigenin treatment upregulated PPARγ expression and downregulated the expression of NLRP3, which subsequently downregulated the production of IL-1β. In addition, GW9662 diminished the inhibitory effects of apigenin on the NLRP3 inflammasome. In conclusion, our results demonstrate that apigenin exhibits antidepressant-like effects in CUMS rats, possibly by inhibiting IL-1β production and NLRP3 inflammasome expression via the up-regulation of PPARγ expression.

  17. Table of Contents

    African Journals Online (AJOL)

    David Seward

    Budapest, Hungary, 2013/2014, LLM in International Economic & Business Law from Kyushu. University ... Under Ethiopian law, only merchants are entitled to file for bankruptcy and ..... 99 John Armour & Douglas Cumming, Bankruptcy Law and Entrepreneurship, 10(2) AMERICAN ...... part of the poverty reduction strategy.

  18. Potential antiinflammatory effects of acupuncture in a chronic stress model of depression in rats.

    Science.gov (United States)

    Lu, Jun; Shao, Run-Hui; Hu, Li; Tu, Ya; Guo, Jian-You

    2016-04-08

    Accumulating evidence indicates that inflammation may contribute to the pathophysiology of depression. Acupuncture in traditional Chinese medicine has been considered an effective treatment for depression. However, whether the mechanisms that underlie the antidepressant effect of acupuncture are related to its antiinflammatory properties remains unclear. In the present study, rats were exposed to chronic unpredictable mild stress (CUMS) for 28 days to induce depressive-like behavior. Body weight, sucrose preference, and locomotor activity in the open field were measured. After the behavioral tests, reverse transcription polymerase chain reaction was used to determine the mRNA expression of proinflammatory cytokines (interleukin-1β [IL-1β], interleukin-6 [IL-6], and tumor necrosis factor-α [TNF-α]), and enzyme-linked immunosorbent assay was used to detect cytokine concentrations. CUMS rats exhibited decrease in body weight, sucrose preference, and locomotor activity in the open field test. Chronic acupuncture and fluoxetine treatment reversed CUMS-induced depressive-like behavior. Compared with control rats, the mRNA and protein expression of IL-1β, IL-6, and TNF-α in the hippocampus and prefrontal cortex and cytokine concentrations in serum significantly increased in CUMS rats. Acupuncture and fluoxetine treatment significantly decreased the levels of proinflammatory cytokines in the hippocampus, prefrontal cortex, and serum. These results suggest that acupuncture has antidepressant-like effects, and its mechanism of action appears to involve the inhibition of proinflammatory cytokines.

  19. Da den danske skole satte humanistlatin i system

    DEFF Research Database (Denmark)

    Horster, Camilla

    2017-01-01

    This article presents a pilot study of the use of moods and tenses in Danish humanist Latin after ne and cum. Comparing descriptions in humanist school grammars with linguistic practice, three states of humanist Latin are under investigation in minor text corpora: literary prose from fifteenth-ce...

  20. Spin squeezing and Schrödinger cat generation in atomic samples with Rydberg blockade

    DEFF Research Database (Denmark)

    Opatrný, Tomáš; Mølmer, Klaus

    2012-01-01

    A scheme is proposed to prepare squeezed states and Schrödinger-cat-like states of the collective spin degrees of freedom associated with a pair of ground states in an atomic ensemble. The scheme uses an effective Jaynes-Cummings interaction which can be provided by excitation of the atoms...

  1. Microstructure and phase transformation on milled and unmilled Ti induced by water quenching

    CSIR Research Space (South Africa)

    Bolokang, AS

    2014-10-01

    Full Text Available Materials Letters Vol. 132 Microstructure and phase transformation on milled and unmilled Ti induced by water quenching A.S.Bolokang a,b,n, M.J.Phasha c, D.E.Motaung b, F.R.Cummings a,d, T.F.G.Muller a, C.J.Arendse a a Department of...

  2. Ergonomic Based Design and Survey of Elementary School Furniture

    Science.gov (United States)

    Maheshwar; Jawalkar, Chandrashekhar S.

    2014-01-01

    This paper presents the ergonomic aspects in designing and prototyping of desks cum chairs used in elementary schools. The procedures adopted for the assessment included: the study of existing school furniture, design analysis and development of prototypes. The design approach proposed a series of adjustable desks and chairs developed in terms of…

  3. 75 FR 1274 - Implantation or Injectable Dosage Form New Animal Drugs; Hyaluronate Sodium

    Science.gov (United States)

    2010-01-11

    ... a supplemental new animal drug application (NADA) filed by Anika Therapeutics, Inc. The supplemental NADA provides for a revised human food safety warning for use of hyaluronate sodium injectable solution... Therapeutics, Inc., 236 W. Cummings Park, Woburn, MA 01801, filed a supplement to NADA 122-578 that provides...

  4. Flax fiber reinforced PLA composites: studies on types of PLA and different methods of fabrication

    CSIR Research Space (South Africa)

    Kumar, R

    2011-05-01

    Full Text Available hand, injection molded flax fiber reinforced PLA specimens showed higher tensile modulus (TM) (3.0 GPa) than solution cast cum compression molded specimens (1.9 GPa). In addition, the properties of the composites depend on the nature of PLA used...

  5. Primary description of surface water phytoplankton pigment patterns in the Bay of Bengal

    Digital Repository Service at National Institute of Oceanography (India)

    Naik, R.K.; Anil, A.C.; Narale, D.D.; Chitari, R.R.; Kulkarni, V.V.

    . Biogeochemical controls and feedbacks on ocean primary production. Science 281, 200-206. Gibb, S.W., Barlow, R.G., Cummings, D.G., Rees, N.W., Trees, C.C., Holligan, P., Suggett, D., 2000. Surface phytoplankton pigment distributions in the Atlantic Ocean...

  6. Process development for gelatinisation and enzymatic hydrolysis of starch at high concentrations

    NARCIS (Netherlands)

    Baks, T.

    2007-01-01

    cum laude graduation (with distinction) Enzymatic hydrolysis of starch is encountered in day-to-day life for instance in the dishwasher during removal of stains with detergents or in our mouth during chewing of starch-based foods in the presence of saliva. The reaction is also important for the (foo

  7. Crystal structure of the terminal oxygenase component of cumene dioxygenase from Pseudomonas fluorescens IP01.

    Science.gov (United States)

    Dong, Xuesong; Fushinobu, Shinya; Fukuda, Eriko; Terada, Tohru; Nakamura, Shugo; Shimizu, Kentaro; Nojiri, Hideaki; Omori, Toshio; Shoun, Hirofumi; Wakagi, Takayoshi

    2005-04-01

    The crystal structure of the terminal component of the cumene dioxygenase multicomponent enzyme system of Pseudomonas fluorescens IP01 (CumDO) was determined at a resolution of 2.2 A by means of molecular replacement by using the crystal structure of the terminal oxygenase component of naphthalene dioxygenase from Pseudomonas sp. strain NCIB 9816-4 (NphDO). The ligation of the two catalytic centers of CumDO (i.e., the nonheme iron and Rieske [2Fe-2S] centers) and the bridging between them in neighboring catalytic subunits by hydrogen bonds through a single amino acid residue, Asp231, are similar to those of NphDO. An unidentified external ligand, possibly dioxygen, was bound at the active site nonheme iron. The entrance to the active site of CumDO is different from the entrance to the active site of NphDO, as the two loops forming the lid exhibit great deviation. On the basis of the complex structure of NphDO, a biphenyl substrate was modeled in the substrate-binding pocket of CumDO. The residues surrounding the modeled biphenyl molecule include residues that have already been shown to be important for its substrate specificity by a number of engineering studies of biphenyl dioxygenases.

  8. Early Life Processes, Endocrine Mediators and Number of Susceptible Cells in Relation to Breast Cancer Risk

    Science.gov (United States)

    2008-04-01

    and breast cancer risk. Breast Cancer Res Treat 2003, 80:127-131. 33. Modugno F, Zmuda JM, Potter D, Cai C, Ziv E, Cummings SR, Stone KL, Morin PA...Key T, Rinaldi S, Dossus L, Biessy C, Secreto G, Amiano P, Bingham S, Boeing H, Bueno de Mesquita HB, Chang- Claude J, et al. Serum sex steroids in

  9. Umbelliferone reverses depression-like behavior in chronic unpredictable mild stress-induced rats by attenuating neuronal apoptosis via regulating ROCK/Akt pathway.

    Science.gov (United States)

    Qin, Tingting; Fang, Fang; Song, Meiting; Li, Ruipeng; Ma, Zhanqiang; Ma, Shiping

    2017-01-15

    There is increasing evidence that major depressive disorder (MDD) is also a progressive neurodegeneration disorder and neuronal damage is the major pathology of MDD. Umbelliferone, a coumarin derivative, was found in a range of plants with proved anti-oxidative, anti-inflammatory and neuroprotective effects. The primary purpose of this investigation was to evaluate whether umbelliferone could confer an antidepressant-like effect on the depressive model in rats developed by chronic unpredictable mild stress (CUMS) and explore the possible mechanism involved in its neuroprotective effects. We found that treatments with umbelliferone (15mg/kg, 30mg/kg) significantly ameliorated CUMS-induced depressive-like behaviors, such as decreased sucrose consumption, reduced locomotor activity and prolonged immobility time. Rats under CUMS stimulation treated with umbelliferone (15mg/kg, 30mg/kg) showed reduced neuronal apoptosis, as well as inhibited inflammatory cytokines levels by down-regulating Rho-associated protein kinase (ROCK) signaling and up-regulating protein kinase B (Akt) signaling. In conclusion, umbelliferone showed neuroprotective effects on CUMS-induced model of depression, which was associated with the inhibition of neuronal apoptosis modulated by ROCK/Akt pathway.

  10. An Army-Centric System of Systems Analysis (SoSA) Definition

    Science.gov (United States)

    2011-02-01

    systems, we turn to the pioneer systems theorist von Bertalanffy . A system is closed if no material enters or leaves it; it is open if there is import and...Benjamin/Cummings, San Francisco, 2000. 29. von Bertalanffy , L. The Theory of Open Systems in Physics and Biology. Science 111 1950, 23–29. 30

  11. Description de Coléoptères nouveaux de la Malaisie, de l’Inde et de la Chine

    NARCIS (Netherlands)

    Fairmaire, L.

    1897-01-01

    Long. 13 mill. — Oblonga, sat convexa, dilute piceola, vage ænescens, opaca, labro dilute testaceo, elytris utrinque plaga magna media, intus constricta et parte apicali lutosis, lateribus utrinque plagulis 2 triangularibus cum prothoracis lateribus æneo-pernitidis, quasi specularibus; capite basin

  12. The Iconography of Universities as Institutional Narratives

    Science.gov (United States)

    Drori, Gili S.; Delmestri, Giuseppe; Oberg, Achim

    2016-01-01

    The coming of "brand society" and the onset of mediatization spur universities to strategize their visual identity and pay particular attention to their icon. Resulting from branding initiatives, university icons are visual self-representations and material-cum-symbolic forms of organizational identity. In this work we ask: What identity…

  13. Labor, Welfare and Coping with the Crisis

    DEFF Research Database (Denmark)

    Schmidt, Johannes Dragsbæk

    the analysis is based on a critical political economy perspective which utilizes a comparative and eclectic methodology. The first part of the paper briefly describes the causes and impacts of the US induced financial crisis cum “Great Depression”. The second part discusses the status of the various models...

  14. The First Treatise in Comparative Education Rediscovered

    Science.gov (United States)

    Lenhart, Volker

    2016-01-01

    The Latin essay "De re Scholastica Anglica cum Germanica Comparata" (English and German school education compared) published in 1795-1798 by the Freiberg/Saxony grammar school principal Friedrich August Hecht is the first treatise in comparative education. The rediscovery of the text, its earlier mentioning in the history of comparative…

  15. Description d’un genre nouveau de la famille des Clérides

    NARCIS (Netherlands)

    Fairmaire, L.

    1887-01-01

    Tarsi quadriarticulati. Prothorax haud marginatus, lateribus cum pleuris confusis. Oculi antice emarginati, subtiliter granulati. Antennæ breves, ab articulo 5° late serratae, articulo 4° brevissimo, ultimo emarginato, apice sat acuto. Palpi omnes articulo ultimo elongato, acuto. Elytra apice rotund

  16. Description d’une espèce nouvelle du genre Casnonidea, Fairm

    NARCIS (Netherlands)

    Fairmaire, L.

    1887-01-01

    Long. 11 mill. — Oblonga, testaceo-rufa, valde nitida, capite elytrisque (tertia basali parte excepta) nigris, antennis fuscis, pedibus nigris, femoribus basi excepta; capite lævi, antice cum ore piceo, inter oculos puncto impresso, inter antennas biimpresso; antennis medium corporis fere attingenti

  17. Design and Study of a Low-Cost Laboratory Model Digital Wind Power Meter

    Science.gov (United States)

    Radhakrishnan, Rugmini; Karthika, S.

    2010-01-01

    A vane-type low-cost laboratory model anemometer cum power meter is designed and constructed for measuring low wind energy created from accelerating fluids. The constructed anemometer is a device which records the electrical power obtained by the conversion of wind power using a wind sensor coupled to a DC motor. It is designed for its…

  18. What the devil is in your phytomedicine? Exploring species substitution in Harpagophytum through chemometric modeling of 1H-NMR and UHPLC-MS datasets.

    Science.gov (United States)

    Mncwangi, Nontobeko P; Viljoen, Alvaro M; Zhao, Jianping; Vermaak, Ilze; Chen, Wei; Khan, Ikhlas

    2014-10-01

    Harpagophytum procumbens (Pedaliaceae) and its close taxonomical ally Harpagophytum zeyheri, indigenous to southern Africa, are being harvested for exportation to Europe where phytomedicines are developed to treat inflammation-related disorders. The phytochemical variation within and between natural populations of H. procumbens (n=241) and H. zeyheri (n=107) was explored using proton nuclear magnetic resonance ((1)H-NMR) and ultra-high performance liquid chromatography coupled to mass spectrometry (UHPLC-MS) in combination with multivariate data analysis methods. The UHPLC-MS results revealed significant variation in the harpagoside content: H. procumbens (0.17-4.37%); H. zeyheri (0.00-3.07%). Only 41% of the H. procumbens samples and 17% of the H. zeyheri samples met the pharmacopoeial specification of ⩾1.2%. Both principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA) indicated separation based on species (UHPLC-MS data OPLS-DA model statistics: R(2)X=0.258, R(2)Y (cum)=0.957 and Q(2)(cum)=0.934; (1)H-NMR data OPLS-DA model statistics: R(2)X=0.830, R(2)Y=0.865 (cum) and Q(2)(cum)=0.829). It was concluded that two species are not chemically equivalent and should not be used interchangeably.

  19. Immiseration Capitalism, Activism and Education: Resistance, Revolt and Revenge

    Science.gov (United States)

    Hill, Dave

    2012-01-01

    This is a panoptic paper in five parts. In Part One, Immiseration Capitalism, I examine the current neoliberal cum neoconservative austerity capitalism and its "class war from above", in particular its resultant relative immiseration and its absolute immiseration, with particular reference to Greece, Ireland, Britain and the USA. In Part…

  20. Adjustment and long-run economic performance in 18 African countries

    DEFF Research Database (Denmark)

    Gebregziabher, Fiseha

    2015-01-01

    This paper investigates the link between IMF-World Bank stabilisation-cum-structural adjustment programs and long-run economic performance in 18 African countries on a country-specific basis for the period 1960-2009. We employ a structural break approach to study the impact on long-run growth...

  1. Testing spatial preferences response patterns in Choice experiments: A comparison between Cheap Talk, Opt-Out Reminder and a control group

    DEFF Research Database (Denmark)

    Bjerregaard, Casper; Ladenburg, Jacob

    responses are related to the use of hypothetical bias mitigation reminders, such as budget reminders, cheap talk (Cummings and Taylor 1999; Loomis et al. 1994). The relevance of this is particularly evident as increasing studies find evidence of the Cheap Talk reminders are less effective in CE (Ladenburg...

  2. Theoretical, Experimental and Numerical Studies on Hybrid Acoustooptic Bistable Devices

    Science.gov (United States)

    1991-06-01

    was generalized to other dynamical systems (see, for instance, Grebogi et al [21] and references therein). Periodic maps, which are pertinent to our...Comm. 64, 49, 1987. 20. R.L. Devaney, An Introduction to Chaotic Dynamical Systems. Benjamin- Cummings: Menlo Park, California, 1986. 21. C. Grebogi , E

  3. Students' Perceptions of the Usefulness of an E-Book with Annotative and Sharing Capabilities as a Tool for Learning: A Case Study

    Science.gov (United States)

    Lim, Ee-Lon; Hew, Khe Foon

    2014-01-01

    E-books offer a range of benefits to both educators and students, including ease of accessibility and searching capabilities. However, the majority of current e-books are repository-cum-delivery platforms of textual information. Hitherto, there is a lack of empirical research that examines e-books with annotative and sharing capabilities. This…

  4. Process development for gelatinisation and enzymatic hydrolysis of starch at high concentrations

    NARCIS (Netherlands)

    Baks, T.

    2007-01-01

    cum laude graduation (with distinction) Enzymatic hydrolysis of starch is encountered in day-to-day life for instance in the dishwasher during removal of stains with detergents or in our mouth during chewing of starch-based foods in the presence of saliva. The reaction is also important for the

  5. Observation of Non-Markovian Dynamics of a Single Quantum Dot in a Micropillar Cavity

    DEFF Research Database (Denmark)

    Madsen, Kristian Høeg; Ates, Serkan; Lund-Hansen, Toke;

    2011-01-01

    We measure the detuning-dependent dynamics of a quasiresonantly excited single quantum dot coupled to a micropillar cavity. The system is modeled with the dissipative Jaynes-Cummings model where all experimental parameters are determined by explicit measurements. We observe non-Markovian dynamics...

  6. Description d’un genre nouveau de la famille des Clérides

    NARCIS (Netherlands)

    Fairmaire, L.

    1887-01-01

    Tarsi quadriarticulati. Prothorax haud marginatus, lateribus cum pleuris confusis. Oculi antice emarginati, subtiliter granulati. Antennæ breves, ab articulo 5° late serratae, articulo 4° brevissimo, ultimo emarginato, apice sat acuto. Palpi omnes articulo ultimo elongato, acuto. Elytra apice

  7. The Iconography of Universities as Institutional Narratives

    Science.gov (United States)

    Drori, Gili S.; Delmestri, Giuseppe; Oberg, Achim

    2016-01-01

    The coming of "brand society" and the onset of mediatization spur universities to strategize their visual identity and pay particular attention to their icon. Resulting from branding initiatives, university icons are visual self-representations and material-cum-symbolic forms of organizational identity. In this work we ask: What identity…

  8. Redundancy and Phonological Rules in Spanish.

    Science.gov (United States)

    Martinez-Gil, Fernando

    1990-01-01

    Analyzes three recent models of phonological representation (underspecification theory, autosegmental spreading of features, and feature hierarchy), focusing on such diachronic and synchronic issues of Spanish phonology as the rule of voicing of voiceless obstruents, vowel raising cum desyllabification, homorganic nasal/lateral assimilation, and…

  9. Factors Influencing Effectiveness of the Acquisition Career Field Initial Education Course

    Science.gov (United States)

    2006-03-01

    Design Method, New York, Wiley. Eisenberger, Robert; Cummings, Jim; Armeli, Stephen; Lynch, Patrick . (1997). “Perceived organizational support...305-312. Lynch, Patrick D.; Eisenberger, Robert; Armeli, Stephen. (1999). “Perceived organizational support: Inferior versus superior performance...Jum C. (1978) Psychometric Theory, New York, McGraw-Hill. Pillai , Rajnandini; Williams, Ethlyn A. (2004). “Transformational leadership, self

  10. Cavity quantum electrodynamics of a quantum dot in a micropillar cavity: comparison between experiment and theory

    DEFF Research Database (Denmark)

    Madsen, Kristian Høeg; Ates, Serkan; Reitzenstein, S.

    2010-01-01

    The coupling between a quantum dot (QD) and a micropillar cavity is experimentally investigated by performing time-resolved, correlation, and two-photon interference measurements. The Jaynes-Cummings model including dissipative Lindblad terms and dephasing is analyzed, and all the parameters...

  11. EPA's SHEDS-multimedia model: children's cumulative pyrethroid exposure estimates and evaluation against NHANES biomarker data

    Science.gov (United States)

    The U.S. EPA's SHEDS-Multimedia model was applied to enhance the understanding of children's exposures and doses to multiple pyrethroid pesticides, including major contributing chemicals and pathways. This paper presents combined dietary and residential exposure estimates and cum...

  12. Particle separation and fractionation by microfiltration

    NARCIS (Netherlands)

    Kromkamp, J.

    2005-01-01

    cum laude graduation (with distinction) For the production of present-day dairy products, raw milk is often considered an entity. However, a large quality improvement could be reached if selected constituents were available. In order to achieve this, milk will have to be fractionated prior to use in

  13. Human-Automation Collaboration in Complex Multivariate Resource Allocation Decision Support Systems

    Science.gov (United States)

    2010-01-01

    the Office of Naval Research (Code 34). We would like to thank Cláudia Ferraz, Andrew Hsiao, Javier Garcia , Andrew Clare, Albert Leung, Anunaya...ASNE Human Systems Integration Symposium, Annapolis, MD, USA, 2007. [6] S. Bruni, J. Marquez , A. Brzezinski, and M.L. Cummings, Visualizing

  14. Strategic Innovation Capacity: A Mixed Method Study on Deliberate Strategic Learning Mechanisms

    NARCIS (Netherlands)

    L.A. Berghman (Liselore)

    2006-01-01

    textabstractLiselore Berghman (ºAntwerp, May 3, 1977) received her Master’s degree in Applied Economics cum laude from the University of Antwerp (Belgium), where she is currently a research and teaching assistant at the Faculty of Applied Economics. Her research interests include strategic managemen

  15. Two Legacies

    Science.gov (United States)

    Smith, Susan

    2012-01-01

    Before Heman Sweatt, an African-American from Houston, won his lawsuit to attend the University of Texas (UT) School of Law, Carlos Cadena, a Mexican-American from San Antonio, was among its brightest students. Cadena graduated summa cum laude from the law school in 1940, a decade before Sweatt's lawsuit forced UT to open its graduate and…

  16. Cultivating a Teacher Community of Practice for Sustainable Professional Development: Beyond Planned Efforts

    Science.gov (United States)

    Mak, Barley; Pun, Shuk-Han

    2015-01-01

    This ethnographic study-cum-action research documents the cultivation of a community of practice for sustainable professional development among a group of 18 teachers of English as second language in Hong Kong through a series of planned efforts over 10?months. By juxtaposing the theory-driven planned efforts and the spontaneous actions and…

  17. Hydrogen production through biocatalyzed electrolysis

    NARCIS (Netherlands)

    Rozendal, R.A.

    2007-01-01

    cum laude graduation (with distinction) To replace fossil fuels, society is currently considering alternative clean fuels for transportation. Hydrogen could be such a fuel. In theory, large amounts of renewable hydrogen can be produced from organic contaminants in wastewater. During his PhD research

  18. Further tests of entreaties to avoid hypothetical bias in referendum contingent valuation

    Science.gov (United States)

    Thomas C. Brown; Icek Ajzen; Daniel Hrubes

    2003-01-01

    Over-estimation of willingness to pay in contingent markets has been attributed largely to hypothetical bias. One promising approach for avoiding hypothetical bias is to tell respondents enough about such bias that they self-correct for it. A script designed for this purpose by Cummings and Taylor was used in hypothetical referenda that differed in payment amount. In...

  19. Immiseration Capitalism, Activism and Education: Resistance, Revolt and Revenge

    Science.gov (United States)

    Hill, Dave

    2012-01-01

    This is a panoptic paper in five parts. In Part One, Immiseration Capitalism, I examine the current neoliberal cum neoconservative austerity capitalism and its "class war from above", in particular its resultant relative immiseration and its absolute immiseration, with particular reference to Greece, Ireland, Britain and the USA. In Part Two,…

  20. Correspondence Courses: A Guide for Authors of Course Units. A Report of Some Experiences and Practices at the Open University.

    Science.gov (United States)

    Sachsenmeier, Peter

    A guide for authors of correspondence course units is presented to aid staff and consultants who will develop a correspondence cum residential course in curriculum development at the Kenya Institute of Education. The guide is based on observations at the Open University at Milton Keynes. The following areas are considered: the contribution of…

  1. Report of the Task Force on the Education of Maryland's African-American Males

    Science.gov (United States)

    Maryland State Department of Education, 2007

    2007-01-01

    In 1993, the Governor's Commission on Black Males, chaired by then Delegate Elijah E. Cummings, issued a report that studied the conditions of African-American males in Maryland as they related to employment, health conditions, criminal justice, and education. The Commission provided a "snapshot of the plight of the black males in Maryland." In…

  2. The Impact of Heterogeneity on Operator Performance in Futuristic Unmanned Vehicle Systems

    Science.gov (United States)

    2009-09-01

    solve a single complex task at a time (Welford 1952; Broadbent 1958). While operators can rapidly switch between cognitive tasks, any sequence of...Developing and Leveraging Information Superiority. CCRP. Broadbent , D. E. 1958. Perception and Communication. Oxford: Pergamon. Cummings, M. L

  3. Publii ovidii nasonis tristium liber IV commentario exegetico instructus

    NARCIS (Netherlands)

    Jonge, Theodorus Jacobus de

    1951-01-01

    Sub finem anni 8 p. Chr. n. P. Ovidius Naso quinquagesimum annum egressus relegatus est. Duas causas ipse poeta affert: perdiderint cum me duo crimina, carmen et error. Verisimile est utrumque crimen pertinuisse ad formulam laesae maiestatis. Augusti temporibus autem crimen laesae maiestatis

  4. Publii ovidii nasonis tristium liber IV commentario exegetico instructus

    NARCIS (Netherlands)

    Jonge, Theodorus Jacobus de

    1951-01-01

    Sub finem anni 8 p. Chr. n. P. Ovidius Naso quinquagesimum annum egressus relegatus est. Duas causas ipse poeta affert: perdiderint cum me duo crimina, carmen et error. Verisimile est utrumque crimen pertinuisse ad formulam laesae maiestatis. Augusti temporibus autem crimen laesae maiestatis quaereb

  5. The Impacts of Swimming Exercise on Hippocampal Expression of Neurotrophic Factors in Rats Exposed to Chronic Unpredictable Mild Stress

    Directory of Open Access Journals (Sweden)

    Pei Jiang

    2014-01-01

    Full Text Available Depression is associated with stress-induced neural atrophy in limbic brain regions, whereas exercise has antidepressant effects as well as increasing hippocampal synaptic plasticity by strengthening neurogenesis, metabolism, and vascular function. A key mechanism mediating these broad benefits of exercise on the brain is induction of neurotrophic factors, which instruct downstream structural and functional changes. To systematically evaluate the potential neurotrophic factors that were involved in the antidepressive effects of exercise, in this study, we assessed the effects of swimming exercise on hippocampal mRNA expression of several classes of the growth factors (BDNF, GDNF, NGF, NT-3, FGF2, VEGF, and IGF-1 and peptides (VGF and NPY in rats exposed to chronic unpredictable mild stress (CUMS. Our study demonstrated that the swimming training paradigm significantly induced the expression of BDNF and BDNF-regulated peptides (VGF and NPY and restored their stress-induced downregulation. Additionally, the exercise protocol also increased the antiapoptotic Bcl-xl expression and normalized the CUMS mediated induction of proapoptotic Bax mRNA level. Overall, our data suggest that swimming exercise has antidepressant effects, increasing the resistance to the neural damage caused by CUMS, and both BDNF and its downstream neurotrophic peptides may exert a major function in the exercise related adaptive processes to CUMS.

  6. Information and Communications Technology (ICT) and the Seduction of Knowledge, Teaching, and Learning: What Lies Ahead for Education

    Science.gov (United States)

    Kompf, Michael

    2005-01-01

    This review essay cum discussion paper outlines areas of concern with the underlying terms and conditions of the use of information and communications technology (ICT) in education. The books that instigated this foray ( Barrell, 2001; Cuban, 2001; Maeroff, 2003) are representative of the field and represent inquiry and opinion that reflect…

  7. Immiseration Capitalism, Activism and Education: Resistance, Revolt and Revenge

    Science.gov (United States)

    Hill, Dave

    2012-01-01

    This is a panoptic paper in five parts. In Part One, Immiseration Capitalism, I examine the current neoliberal cum neoconservative austerity capitalism and its "class war from above", in particular its resultant relative immiseration and its absolute immiseration, with particular reference to Greece, Ireland, Britain and the USA. In Part…

  8. Associations between Major Domains of Personality and Health Behavior

    Science.gov (United States)

    1991-11-01

    Inventory. Personality and Individual Differences 12, 887-898. Cummings, K. M., Jette, A. M., Brock, B. M., & Haefner, D. P. (1979). Psychosocial...behavior. Journal of Personality, 51, 360-392. Eysenck, H.J. (1985). Personality, cancer and cardiovascular diseae: A causal analysis. Personality and Individual Differences , 6

  9. Virtual and Traditional Feedback-Seeking Behaviors: Underlying Competitive Attitudes and Consequent Grade Performance

    Science.gov (United States)

    Hwang, Alvin; Arbaugh, J. B.

    2006-01-01

    The electronic medium continues to play an increasingly important role in the delivery of management education despite a paucity of empirical studies on its impact and efficacy. Results from a study of competitive attitudes and feedback-seeking behaviors across seven "hybrid" electronic cum live classes showed that…

  10. Community Adult Education; Evidence Submitted to the Russell Committee on Adult Education in England and Wales by the Workers' Educational Association (West Lancashire & Cheshire District) and the Liverpool Educational Priority Area Action/Research Project.

    Science.gov (United States)

    Lovett, T. O.

    This paper discusses six roles which an adult education agency can fill in an Educational Priority Area and illustrates each one with examples from the Liverpool E.P.A. Project. These roles are: (1) adult education cum community development; (2) adult education as a resource in community development work; (3) adult education as an aid to parents…

  11. Religion in Military Society: Reconciling Establishment and Free Exercise

    Science.gov (United States)

    2014-06-01

    Cum Pecunia Alienum Efficemus’ (Do- ing Miracles with Other People’s Money).”34 Applying the Lemon test, we ask, Does the logo have a secular purpose...chaplain for the USAF Expeditionary Center, Joint Base McGuire-Dix-Lakehurst, New Jersey. As course director and academic instructor, he developed

  12. Beauty, a road to the truth

    NARCIS (Netherlands)

    Kuipers, T.A.F.

    2002-01-01

    In this article I give a naturalistic-cum-formal analysis of the relation between beauty, empirical success, and truth. The analysis is based on the one hand on a hypothetical variant of the so-called 'mere-exposure effect' which has been more or less established in experimental psychology regarding

  13. Verification of the Single Scattering Analytical Model for Mode Coupling Effects Caused by Solitons

    Science.gov (United States)

    2009-09-01

    Sakuri, J. (1985). Modern Quantum Mechanics (Benjamin/Cummings, Menlo Park, CA), 72–73. Smith, A., and Smith, K. (1998). “Mode functions for the...Colosi used this fact to produce a solution to Equation 35 in terms of the Dyson Series (Dyson, 1949; Sakurai , 1985). The solution to second

  14. Hydrogen production through biocatalyzed electrolysis

    NARCIS (Netherlands)

    Rozendal, R.A.

    2007-01-01

    cum laude graduation (with distinction) To replace fossil fuels, society is currently considering alternative clean fuels for transportation. Hydrogen could be such a fuel. In theory, large amounts of renewable hydrogen can be produced from organic contaminants in wastewater. During his PhD research

  15. What I Think I May Have Learned--Reflections on 50 Years of Teaching: An Interview with Michael Wertheimer

    Science.gov (United States)

    Michael, Kurt D.

    2006-01-01

    Kurt Michael is an associate professor in the Department of Psychology at Appalachian State University (ASU) where he teaches history and systems of psychology, abnormal psychology, child psychopathology, and interventions for children and adolescents. He received his BA (cum laude) from the University of Colorado at Boulder and his MS and PhD in…

  16. Proceedings of the Annual Conference on Environmental Toxicology (8th) held at Dayton, OH, 4-6 October 1977

    Science.gov (United States)

    1977-12-01

    Controlling Office) 15. SECURITY CLASS. (of this report) Unclassified 15a. DECL ASSI FICATION/DOWN GRADING SCHEDULE 16. DISTRIBUTION STATEMENT (of this...J., H. J. Cumming, A. M. Machado , J. E. Schneider, C. R. Crane, D. C. Sanders, B. R. Endocott, and J. K. Abbott, (1977), "Comparison of Animal

  17. Greige cotton comber noils for sustainable nonwovens

    Science.gov (United States)

    To increase utilization of cotton in value-added nonwoven products, a study was conducted to examine the feasibility of utilizing cotton textile processing/combing bye-product known as griege cotton comber noils. The study was conducted on a commercial-grade, textile-cum-nonwovens pilot plant and ha...

  18. Teacher's Professional Development from Vygotskian Optique

    Science.gov (United States)

    Shabani, Karim

    2012-01-01

    Vygotsky's concept of ZPD (Zone of Proximal Development) has been recently applied to the context of language teacher education by a number of researchers (e.g. Ohta, 2005; Singh & Richards, 2006; Nassaji & Cumming, 2000). Besides Vygotsky's notion of ZPD, this paper relies on two associated theories from outside the TESOL discipline…

  19. Adolescent Substance Abuse.

    Science.gov (United States)

    Thorne, Craig R.; DeBlassie, Richard R.

    1985-01-01

    Cummings (1979), citing evidence from the National Institute of Drug Abuse, reports that one of every eleven adult Americans suffers from a severe addictive problem. Drug addiction is epidemic among teenagers; one of every six teenagers suffers from a severe addictive problem. This paper focuses on adolescent drug/substance abuse. (Author)

  20. Permanent and Transient Radiation Effects on Thin-Oxide (200-A) MOS Transistors

    Science.gov (United States)

    1976-06-01

    improvement DD. ~ =0 M ETOF INov soaOGWLETE 1 UNCLASSIFIED 99CUMTV CLASSIFICATION OF THIS PAGE1 (Shin DOS 8 UNCLASSIFIED - i ’ $IcCUmITY CLASSIFICATION OF...APtAMENT COMMAND ROCK ISLAND, IL 61201 COMMANDER ATTN DRSAR-ASF, FUZE DIV US ARMY MATERIALS & MECHANICS ATTN DP!EAR-RDF, SYS DEV DIV - FUZES RESEARCH

  1. Publii ovidii nasonis tristium liber IV commentario exegetico instructus

    NARCIS (Netherlands)

    Jonge, Theodorus Jacobus de

    1951-01-01

    Sub finem anni 8 p. Chr. n. P. Ovidius Naso quinquagesimum annum egressus relegatus est. Duas causas ipse poeta affert: perdiderint cum me duo crimina, carmen et error. Verisimile est utrumque crimen pertinuisse ad formulam laesae maiestatis. Augusti temporibus autem crimen laesae maiestatis quaereb

  2. Decoherence at constant excitation

    Science.gov (United States)

    Torres, J. M.; Sadurní, E.; Seligman, T. H.

    2012-02-01

    We present a simple exactly solvable extension of the Jaynes-Cummings model by adding dissipation. This is done such that the total number of excitations is conserved. The Liouville operator in the resulting master equation can be reduced to blocks of 4×4 matrices.

  3. Decoherence at constant excitation

    CERN Document Server

    Torres, Juan Mauricio; Seligman, Thomas H

    2011-01-01

    We present a simple exactly solvable extension of of the Jaynes-Cummings model by adding dissipation. This is done such that the total number of excitations is conserved. The Liouville operator in the resulting master equation can be reduced to blocks of $4\\times 4$ matrices.

  4. Poetry corner.

    Science.gov (United States)

    Fox Lee, Shayna

    2017-05-01

    This section briefly presents poetry with a psychology theme. This submission was made by The Cummings Center for the History of Psychology's reference archivist Lizette Royer. Two transcribed poems by Knight Dunlap are presented. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  5. Drug: D10238 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available D10238 Crude, Drug Coix fruit with involucre (non-JP); Coicis fructus cum involucri...rds for non-pharmacopoeial crude drugs Crude drugs [BR:br08305] Monocot plants Poaceae (grass family) D10238 Coix fruit with involucre PubChem: 163312269 ...

  6. An interesting new Bulbophyllum

    NARCIS (Netherlands)

    Smith, J.J.

    1935-01-01

    Bulbophyllum (sect. Cirrhopetalum) Jacobsonii J. J. S. n. sp. — Rhizoma repens, teres. Pseudobulbi remoti, oblique ovoidei, manifesto quadranguli cum lateribus concavis, 1.8 cm longi, 0.75 et 0.95 cm diam., 1-folii. Folium lanceolatum, apice recurvulum, basi brevissime conduplicato-petiolatoacuminat

  7. Exact and useful optimization methods for microeconomics

    NARCIS (Netherlands)

    Balder, E.J.

    2011-01-01

    This paper points out that the treatment of utility maximization in current textbooks on microeconomic theory is deficient in at least three respects: breadth of coverage, completeness-cum-coherence of solution methods and mathematical correctness. Improvements are suggested in the form of a Kuhn-Tu

  8. Comparison of Data-Collection Methods in a Behavioral Intervention Program for Children with Pervasive Developmental Disorders: A Replication

    Science.gov (United States)

    Najdowski, Adel C.; Chilingaryan, Vardui; Bergstrom, Ryan; Granpeesheh, Doreen; Balasanyan, Susie; Aguilar, Barbara; Tarbox, Jonathan

    2009-01-01

    Cummings and Carr (2009) compared two methods of data collection in a behavioral intervention program for children with pervasive developmental disorders: collecting data on all trials versus only the first trial in a session. Results showed that basing a child's progress on first-trial data resulted in identifying mastery-level responding…

  9. Environ: E00845 [KEGG MEDICUS

    Lifescience Database Archive (English)

    Full Text Available E00845 Coix fruit with involucre (non-JP) Coicis fructus cum involucris Adlay Crude... drug Coix lacryma-jobi [TAX:714458] Same as: D10238 Poaceae (grass family) Adlay fruit and bract; Standards for non-pharmacopoeial crude drugs ...

  10. Drama Queen or Trauma Queen: Does Elevating Self-Awareness Impact the Colonized Consciousness of Female Clergy?

    Science.gov (United States)

    Clifton, Angelita

    2013-01-01

    This project design incorporates three Aramaic phrases enhancing an existing ministry model for women victimized by trauma. "Talitha Cum-Woman Arise," "Ephpatha-Be Opened" and "Maranatha-O'Lord Come," serve as the foundation for a three tiered spiritual support system for female clergy. This project design…

  11. The role of structural effects on the reactions of alkoxyl radicals with trialkyl and triaryl phosphites. A time-resolved kinetic study.

    Science.gov (United States)

    Bietti, Massimo; Calcagni, Alessandra; Salamone, Michela

    2010-07-02

    A time-resolved kinetic study on the reactions of alkoxyl radicals with trialkyl and triaryl phosphites ((RO)(3)P: R = Me, Et, i-Pr, t-Bu; (ArO)(3)P: Ar = C(6)H(5), 2,4-(t-Bu)(2)C(6)H(3)) has been carried out. In the (RO)(3)P series, the alkoxyl radicals (cumyloxyl (CumO(*)) and benzyloxyl (BnO(*))) undergo addition to the phosphorus center with formation of intermediate tetraalkoxyphosphoranyl radicals (R'OP(*)(OR)(3): R = Me, Et, i-Pr, t-Bu; R' = Bn, Cum). The addition rate constants are influenced by steric effects, decreasing on going from R = Me to R = t-Bu and from BnO(*) to CumO(*). Rate constants for beta-scission of the phosphoranyl radicals R'OP(*)(OR)(3) have also been determined, increasing, for a given alkyl group R, in the order R' = tert-butyl < R' = benzyl < R' = cumyl and, for a given R' group, on going from R = Me to R = i-Pr. This behavior has been explained in terms of the relative stability of the radicals formed after beta-scission, suggesting moreover that steric effects play in this case a minor role. CumO(*) reacts with triaryl phosphites (ArO)(3)P to give phenoxyl radicals, with rate constants that are influenced to a limited extent by substitution of the aromatic rings. The radical scavenging ability of these substrates is briefly discussed.

  12. Reactivity and selectivity patterns in hydrogen atom transfer from amino acid C-H bonds to the cumyloxyl radical: polar effects as a rationale for the preferential reaction at proline residues.

    Science.gov (United States)

    Salamone, Michela; Basili, Federica; Bietti, Massimo

    2015-04-03

    Absolute rate constants for hydrogen atom transfer (HAT) from the C-H bonds of N-Boc-protected amino acids to the cumyloxyl radical (CumO(•)) were measured by laser flash photolysis. With glycine, alanine, valine, norvaline, and tert-leucine, HAT occurs from the α-C-H bonds, and the stability of the α-carbon radical product plays a negligible role. With leucine, HAT from the α- and γ-C-H bonds was observed. The higher kH value measured for proline was explained in terms of polar effects, with HAT that predominantly occurs from the δ-C-H bonds, providing a rationale for the previous observation that proline residues represent favored HAT sites in the reactions of peptides and proteins with (•)OH. Preferential HAT from proline was also observed in the reactions of CumO(•) with the dipeptides N-BocProGlyOH and N-BocGlyGlyOH. The rate constants measured for CumO(•) were compared with the relative rates obtained previously for the corresponding reactions of different hydrogen-abstracting species. The behavior of CumO(•) falls between those observed for the highly reactive radicals Cl(•) and (•)OH and the significantly more stable Br(•). Taken together, these results provide a general framework for the description of the factors that govern reactivity and selectivity patterns in HAT reactions from amino acid C-H bonds.

  13. Leadership Aspects of Hidden Curriculum Students Practice in Nigerian Universities: A Preview of Students' Union Government Contributions in University Governance

    Science.gov (United States)

    Emesini, Nnenna Orieoma

    2016-01-01

    The paper examined the leadership aspect of Hidden Curriculum that students practice in Nigerian Universities and their contributions to university governance. Four research questions guided the study and Ex-Post-Facto Method was adopted as the design. Unstructured interviews with staff/students officials cum critical analysis of Students' Union…

  14. 78 FR 24047 - Wage Methodology for the Temporary Non-Agricultural Employment H-2B Program, Part 2

    Science.gov (United States)

    2013-04-24

    ... Comit de Apoyo a los Trabajadores Agricolas v. Solis, which vacated portions of DOL's current prevailing... Department receives available for public inspection during normal business hours at the Employment and...: Kevin J. Cummings, Chief, Business and Foreign Workers Division, Office of Policy and Strategy,...

  15. Online Help for Problem Gambling among Chinese Youths

    Science.gov (United States)

    Lee, Chang Boon Patrick

    2011-01-01

    The objectives of this study were to determine the perceptions and accessibility of online help for problem gambling among Chinese youths. A group of undergraduates participated in a survey cum laboratory exercise to search for help for problem gambling in Macao, Hong Kong, and China. Online search engines were used. During the search process,…

  16. How Do Teachers Feel about Science?: Measurement of Attitudes towards Science.

    Science.gov (United States)

    Moore, Alan D.; Martin, Janet T.

    The factor structure and reliability of an instrument for measuring attitudes of preservice teachers toward science were studied as part of a 5-year project at the University of Wyoming (Laramie) to improve the teaching of science at the elementary school level. The Attitudes towards Science and Scientists Scale (ATSSS) of J. R. Cummings (1969)…

  17. Children's Representations of Family Relationships, Peer Information Processing, and School Adjustment

    Science.gov (United States)

    Bascoe, Sonnette M.; Davies, Patrick T.; Sturge-Apple, Melissa L.; Cummings, E. Mark

    2009-01-01

    This study examined children's peer information processing as an explanatory mechanism underlying the association between their insecure representations of interparental and parent-child relationships and school adjustment in a sample of 210 first graders. Consistent with emotional security theory (P. T. Davies & E. M. Cummings, 1994), results…

  18. Design and Study of a Low-Cost Laboratory Model Digital Wind Power Meter

    Science.gov (United States)

    Radhakrishnan, Rugmini; Karthika, S.

    2010-01-01

    A vane-type low-cost laboratory model anemometer cum power meter is designed and constructed for measuring low wind energy created from accelerating fluids. The constructed anemometer is a device which records the electrical power obtained by the conversion of wind power using a wind sensor coupled to a DC motor. It is designed for its…

  19. An Analysis of Missed Appointments at a Military Treatment Facility

    Science.gov (United States)

    1982-05-15

    34Shaping a clinic population: The dropout problem reconsidered," Community Mental Health Journal 10 (February 1974): 177-178. 33 R. E. Cummings, "A study...Clinic Population: The Dropout Problem Reconsidered." Community Mental Health Journal 10 (February 1974): 173-179. Tiester, Alan R., and Rudestam, KJell

  20. Food of larval Anopheles culicifacies and Anopheles varuna in a stream habitat in Sri Lanka

    DEFF Research Database (Denmark)

    Piyaratne, M K; Amerasinghe, P H; Amerasinghe, F P

    2005-01-01

    No previous studies have been conducted on the natural food of larval Anopheles culicifacies s.l. (the major malaria vector) and An. varuna (a secondary vector) in Sri Lanka. The present study analyzed the contents of guts dissected from larvae collected from pools in a natural stream-cum-irrigat...

  1. Drama Queen or Trauma Queen: Does Elevating Self-Awareness Impact the Colonized Consciousness of Female Clergy?

    Science.gov (United States)

    Clifton, Angelita

    2013-01-01

    This project design incorporates three Aramaic phrases enhancing an existing ministry model for women victimized by trauma. "Talitha Cum-Woman Arise," "Ephpatha-Be Opened" and "Maranatha-O'Lord Come," serve as the foundation for a three tiered spiritual support system for female clergy. This project design serves: (1)…

  2. Synthesis, spectral and structural studies of water soluble arene ruthenium (II) complexes containing 2,2′-dipyridyl-N-alkylimine ligand

    Digital Repository Service at National Institute of Oceanography (India)

    Singh, K.S.; Kaminsky, W.

    . [12] R. E. Aird, J. Cummings, A. A. Ritchie, M. Muir, R. E. Morris, H. Chen, P. J. Sadler, D. I. Jodrell, Br. J. Cancer 86 (2002)1652. [13] V. Tangoulis, C. P. Raptopoulou, A. Terzis, S. Pachalidou, S. P. Perlepes, E. G. Bakalbassis, Inorg. Chem...

  3. Validation and Intercomparison Studies Within GODAE

    Science.gov (United States)

    2009-09-01

    systems were implemented with financial support from the Region Midi Pyrenees . The US effort was supported by the project US GODAE: Global Ocean... Government Printing Office, 182 pp. Oke, PR., M.A. Balmaseda, M. Benkiran, J.A. Cummings, E. Dombrowsky, Y. Fujii, S. Guinehut, G. Larnicol, P.-Y. Le

  4. Re-inventing the Historical in Comparative Education: Reflections on a Protean Episteme by a Contemporary Player.

    Science.gov (United States)

    Kazamias, Andreas M.

    2001-01-01

    Since the 1960s, the epistemological-cum-methodological orientations of American and British comparative education changed from being historical to being social scientific. This metamorphosis has impoverished the field, and a return to a re-invented historical mode of comparative analysis would help to humanize comparative education in a cosmos of…

  5. 78 FR 39769 - National Register of Historic Places; Notification of Pending Nominations and Related Actions

    Science.gov (United States)

    2013-07-02

    ... County Boyle Hotel--Cummings Block, 101-105 N. Boyle Ave., Los Angeles, 13000509 Case Study House No. 1, (Case Study House Program MPS) 10152 Toluca Lake Ave., Los Angeles, 13000512 Case Study House No. 22, (Case Study House Program MPS) 1635 Woods Dr., Los Angeles, 13000519 Case Study House No. 10, (Case...

  6. The Importance of Treating Culture as a System: Lessons on Counter-Insurgency Strategy from the British Iraqi Mandate

    Science.gov (United States)

    2005-10-01

    the purpose of influencing their development or changing them. Talcott Parsons is perhaps the best-known proponent of the idea that we should treat... Talcott Parson’s mid-Twentieth century model to a more subtle biological cum psychological conception of cultural processes. 2. Second, I’ll discuss

  7. High-Yield Preparation and Electrochemical Properties of Few-Layer MoS2 Nanosheets by Exfoliating Natural Molybdenite Powders Directly via a Coupled Ultrasonication-Milling Process

    Science.gov (United States)

    Dong, Huina; Chen, Deliang; Wang, Kai; Zhang, Rui

    2016-09-01

    Cost-effective and scalable preparation of two-dimensional (2D) molybdenum disulfide (MoS2) has been the bottleneck that limits their applications. This paper reports a novel coupled ultrasonication-milling (CUM) process to exfoliate natural molybdenite powders to achieve few-layer MoS2 (FL-MoS2) nanosheets in the solvent of N-methyl-2-pyrrolidone (NMP) with polyvinylpyrrolidone (PVP) molecules. The synergistic effect of ultrasonication and sand milling highly enhanced the exfoliation efficiency, and the precursor of natural molybdenite powders minimizes the synthetic cost of FL-MoS2 nanosheets. The exfoliation of natural molybdenite powders was conducted in a home-made CUM system, mainly consisting of an ultrasonic cell disruptor and a ceramic sand mill. The samples were characterized by X-ray diffraction, UV-vis spectra, Raman spectra, FT-IR, SEM, TEM, AFM, and N2 adsorption-desorption. The factors that influence the exfoliation in the CUM process, including the initial concentration of natural molybdenite powders ( C in, 15-55 g L-1), ultrasonic power ( P u, 200-350 W), rotation speed of sand mill ( ω s, 1500-2250 r.p.m), exfoliation time ( t ex, 0.5-6 h), and the molar ratio of PVP unit to MoS2 ( R pm, 0-1), were systematically investigated. Under the optimal CUM conditions (i.e., C in = 45 g L-1, P u = 280 W, ω s = 2250 r.p.m and R pm = 0.5), the yield at t ex = 6 h reaches 21.6 %, and the corresponding exfoliation rate is as high as 1.42 g L-1 h-1. The exfoliation efficiency of the CUM mode is much higher than that of either the ultrasonication (U) mode or the milling (M) mode. The synergistic mechanism and influencing rules of the CUM process in exfoliating natural molybdenite powders were elaborated. The as-obtained FL-MoS2 nanosheets have a high specific surface area of 924 m2 g-1 and show highly enhanced electrocatalytic performance in hydrogen evolution reaction and good electrochemical sensing property in detecting ascorbic acid. The CUM process

  8. 米邦塔仙人掌果胶对慢性不可预知温和应激小鼠绝望症状的改善作用%Study on the improvement of milpa alta cactus pectin on desperate symptoms in mice exposed to chronic unpreditc able mild stress

    Institute of Scientific and Technical Information of China (English)

    肖同楚; 黄朝明; 杨兴娥; 湛进进; 郭莲军

    2015-01-01

    目的:研究米邦塔仙人掌果胶( MCP)对慢性不可预知温和应激( CUMS)小鼠绝望症状的改善作用。方法雄性昆明种小鼠随机分为空白对照组、模型组、MCP低剂量组(50 mg/kg)、MCP中剂量组(100 mg/kg)、MCP高剂量组(200 mg/kg)。除空白对照组不进行任何应激处理外,其余组均进行CUMS,各MCP组均在进行CUMS期间每天灌胃相应剂量MCP。造模结束24 h后进行悬尾实验,48 h后进行强迫游泳实验。结果模型组悬尾实验潜伏期显著短于空白对照组(P<0.01),累计不动时间显著长于空白对照组(P<0.01);MCP高剂量组潜伏期显著长于模型组(P<0.05),MCP中、高剂量组累计不动时间显著短于模型组(P均<0.01)。模型组强迫游泳实验潜伏期显著短于空白对照组(P<0.01),累计不动时间显著长于空白对照组(P<0.01);MCP各给药组潜伏期与空白对照组比较差异均无统计学意义(P均>0.05),而MCP高剂量组累计不动时间显著短于模型组(P<0.05)。结论 MCP能较好地缓解CMS小鼠的行为绝望症状。%Objetc ive It is to investigate the effect of milpa alta cactus pectin ( MCP) on desperate symptoms in mice ex-posed to chronic unpredictable mild stress ( CUMS) .Methods The male Kunming mice were randomly divided into 5 groups such as control group, CUMS+Vehicle group, CUMS+MCP 50 mg/kg group, CUMS+MCP 100 mg/kg group, and CUMS+MCP 200 mg/kg group.Except the control group, the other groups were exposed to CUMS for 6 weeks.And during this peri-od, the animals were treated with corresponding drug by intragastric administration.While the ends of the model, the tail sus-pension test ( TST) was carried out after 24 hours, and the forced swimming test ( FST) were conducted after 48 hours.Re-sults In TST, the latency of the CUMS+Vehicle group was significantly shorter (P0.05), and the immobility time of the

  9. Orbitofrontal cortex 5-HT2A receptor mediates chronic stress-induced depressive-like behaviors and alterations of spine density and Kalirin7.

    Science.gov (United States)

    Xu, Chang; Ma, Xin-Ming; Chen, Hui-Bin; Zhou, Meng-He; Qiao, Hui; An, Shu-Cheng

    2016-10-01

    Neuroimaging studies show that patients with major depression have reduced volume of the orbitofrontal cortex (OFC). Although the serotonin (5-HT) 2A receptor, which is abundant in the OFC, has been implicated in depression, the underlying mechanisms in the development of stress-induced depression remain unclear. Kalirin-7 (Kal7) is an essential component of mature excitatory synapses for maintaining dendritic spines density, size and synaptic functions. The aim of this study was to investigate the role of orbitofrontal 5-HT and 5-HT2A receptors in depressive-like behaviors and their associations with Kal7 and dendritic spines using chronic unpredictable mild stress (CUMS), an established animal model of depression. CUMS had no effect on the levels of 5-HT or the 5-HT2A receptor in the OFC. However, CUMS or microinjection of the 5-HT2A/2C receptor agonist (±)-1-(2, 5-Dimethoxy-4-iodophenyl)- 2-aminopropane hydrochloride (DOI, 5 μg/0.5 μL) into the OFC induced depressive-like behaviors, including anhedonia in the sucrose preference test and behavioral despair in the tail suspension test, a significant reduction in body weight gain and locomotor activity in the open field test, which were accompanied by decreased expression of Kal7 and PSD95 as well as decreased density of dendritic spines in the OFC. These alterations induced by CUMS were reversed by pretreatment with the 5-HT2A receptor antagonist Ketanserin (Ket, 5 μg/0.5 μL into the OFC). These results suggest that CUMS alters structural plasticity through activation of the orbital 5-HT2A receptor and is associated with decreased expression of Kal7, thereby resulting in depressive-like behaviors in rats, suggesting an important role of Kal7 in the OFC in depression.

  10. The Functional Study of a Chinese Herbal Compounded Antidepressant Medicine--Jie Yu Chu Fan Capsule on Chronic Unpredictable Mild Stress Mouse Model.

    Directory of Open Access Journals (Sweden)

    Lingling Ding

    Full Text Available Jie Yu Chu Fan capsule (JYCF is a new compounded Chinese herbal medicine for the treatment of depression. The present study was designed to explore the antidepressant effects and the possible mechanisms of JYCF by using chronic unpredictable mild stress (CUMS mouse model and comparing results to that of fluoxetine. Behavioral tests including an open field test, sucrose preference test and forced swim test were performed to evaluate the antidepressant effects of JYCF. The concentrations of monoamine neurotransmitters and metabolic products including norepinephrine (NE, 5-hydroxytryptamine (5-HT, dopamine (DA, 5-hydroxyindoleacetic acid (5-HIAA, homovanillic acid (HVA and 3,4-dihydroxyphenylacetic acid (DOPAC in the cerebral cortex and hippocampus of mice were determined by means of high performance liquid chromatography with electrochemical detection (HPLC-EC. The results show that a successful mouse CUMS model was established through 5 weeks of continuous unpredictable stimulation, as indicated by the significant decrease in sucrose preference and locomotor activity and increase in immobility time in the forced swim test. Chronic treatment of JYCF (1.25, 2.5 and 5 g/kg and fluoxetine (20 mg/kg significantly reversed the CUMS-induced behavioral abnormalities. JYCF (1.25, 2.5 and 5 g/kg significantly increased NE in CUMS mouse prefrontal cortex (P < 0.01, P < 0.01, P < 0.05 respectively and 5-HT in hippocampus (P < 0.05. In summary, our findings suggest that JYCF exerts comparable antidepressant-like effects to that of fluoxetine in CUMS mice. Besides, the antidepressant-like effect of JYCF is mediated by the increase of monoaminergic transmitters including 5-HT and NE.

  11. Kinetic solvent effects on hydrogen abstraction reactions from carbon by the cumyloxyl radical. The importance of solvent hydrogen-bond interactions with the substrate and the abstracting radical.

    Science.gov (United States)

    Salamone, Michela; Giammarioli, Ilaria; Bietti, Massimo

    2011-06-03

    A kinetic study of the hydrogen atom abstraction reactions from propanal (PA) and 2,2-dimethylpropanal (DMPA) by the cumyloxyl radical (CumO•) has been carried out in different solvents (benzene, PhCl, MeCN, t-BuOH, MeOH, and TFE). The corresponding reactions of the benzyloxyl radical (BnO•) have been studied in MeCN. The reaction of CumO• with 1,4-cyclohexadiene (CHD) also has been investigated in TFE solution. With CHD a 3-fold increase in rate constant (k(H)) has been observed on going from benzene, PhCl, and MeCN to TFE. This represents the first observation of a sizable kinetic solvent effect for hydrogen atom abstraction reactions from hydrocarbons by alkoxyl radicals and indicates that strong HBD solvents influence the hydrogen abstraction reactivity of CumO•. With PA and DMPA a significant decrease in k(H) has been observed on going from benzene and PhCl to MeOH and TFE, indicative of hydrogen-bond interactions between the carbonyl lone pair and the solvent in the transition state. The similar k(H) values observed for the reactions of the aldehydes in MeOH and TFE point toward differential hydrogen bond interactions of the latter solvent with the substrate and the radical in the transition state. The small reactivity ratios observed for the reactions of CumO• and BnO• with PA and DMPA (k(H)(BnO•)/k(H)(CumO•) = 1.2 and 1.6, respectively) indicate that with these substrates alkoxyl radical sterics play a minor role.

  12. Reactions of the cumyloxyl and benzyloxyl radicals with strong hydrogen bond acceptors. Large enhancements in hydrogen abstraction reactivity determined by substrate/radical hydrogen bonding.

    Science.gov (United States)

    Salamone, Michela; DiLabio, Gino A; Bietti, Massimo

    2012-12-07

    A kinetic study on hydrogen abstraction from strong hydrogen bond acceptors such as DMSO, HMPA, and tributylphosphine oxide (TBPO) by the cumyloxyl (CumO(•)) and benzyloxyl (BnO(•)) radicals was carried out in acetonitrile. The reactions with CumO(•) were described in terms of a direct hydrogen abstraction mechanism, in line with the kinetic deuterium isotope effects, k(H)/k(D), of 2.0 and 3.1 measured for reaction of this radical with DMSO/DMSO-d(6) and HMPA/HMPA-d(18). Very large increases in reactivity were observed on going from CumO(•) to BnO(•), as evidenced by k(H)(BnO(•))/k(H)(CumO(•)) ratios of 86, 4.8 × 10(3), and 1.6 × 10(4) for the reactions with HMPA, TBPO, and DMSO, respectively. The k(H)/k(D) of 0.91 and 1.0 measured for the reactions of BnO(•) with DMSO/DMSO-d(6) and HMPA/HMPA-d(18), together with the k(H)(BnO(•))/k(H)(CumO(•)) ratios, were explained on the basis of the formation of a hydrogen-bonded prereaction complex between the benzyloxyl α-C-H and the oxygen atom of the substrates followed by hydrogen abstraction. This is supported by theoretical calculations that show the formation of relatively strong prereaction complexes. These observations confirm that in alkoxyl radical reactions specific hydrogen bond interactions can dramatically influence the hydrogen abstraction reactivity, pointing toward the important role played by structural and electronic effects.

  13. Prostacyclin (PGI sub 2 ) synthesis in basal and thrombin challenged aortic rings is depressed in copper deficient and copper marginal rats

    Energy Technology Data Exchange (ETDEWEB)

    Nelson, S.K.; Mathias, M.M.; Allen, K.G.D. (Colorado State Univ., Ft. Collins (United States) Dept. of Agriculture, Washington, DC (United States))

    1991-03-15

    Thirty male weanling rats were fed AIN based copper deficient (CuD) diet containing 0.1% of the Cu chelator N,N{prime}-bis(2-aminoethyl)-1,3-propanediamine.4HCl for 1 week. Animals were then assigned to three groups of 10 each and fed copper adequate (CuA), copper marginal (CuM) on CuD diets providing 7.5, 1.6 and 0.5 {mu}g Cu/g respectively for 26 days. Animals were pair meal fed to CuD for the last 16 days. Thoracic aorta were excised and 2 mm rings incubated in 2 ml Krebs Henseleit salts, 10mM HEPES pH 7.4, 37{degree}, 95.5 O{sub 2}/CO{sub 2}. PGI{sub 2} in incubation medium was determined by RIA as 6-keto PGF{sub 1{alpha}}. Cu status was assessed by liver Cu and aortic tissue superoxide dismutase (CuSOD). PGI{sub 2} production by 1 hour rested rings was linear from 0 to 10 minutes. Rested aortic rings produced < 5% PGI{sub 2} as in freshly excised rings. PGI{sub 2} synthesis in basal incubation, was significantly depressed 41% in CuM and 56% in CuD aortic rings. Challenge with 1OU/ml thrombin significantly increased PGI{sub 2} synthesis in CuA, CuM and CuD aortic rings by 32%-54%. CuM and CuD aortic ring PGI{sub 2} synthesis was significantly depressed by 32% and 48% respectively in thrombin challenged incubations. Both CuM and CuD decrease basal and thrombin challenged aortic ring PGI{sub 2} synthesis and this is associated with changes in aortic tissue CuSOD.

  14. 高脂血症叠加慢性不可预见性应激模型大鼠open-field行为学特征分析%Open-field behavioral study in rat hyperlipidemia combined with chronic unpredictable mild stress model

    Institute of Scientific and Technical Information of China (English)

    胡华; 张迎春; 许烨勍; 刘春风; 王立伟

    2015-01-01

    Objective To investigate behavioral changes in a rat hyperlipidemia model induced by high lipid feed combined with depression by Chronic Unpredictable Mild Stress (CUMS).Methods A total of 40 rats were randomly divided into control (CON),control feed for 9 weeks followed by CUMS for 4 weeks (CON + CUMS),high fat diet (HFD) and high lipid feed for 9 weeks followed by CUMS for 4 weeks (HFD + CUMS) (n =10 each).Open-field test was individually measured at baseline,week 9 and week 13.Results (1) Serum lipids:total cholesterol [(2.67 ± 0.04) mmol/L,(2.68 ± 0.02) mmol/L] and low density lipoprotein [(1.08 ± 0.03) mmol/L,(1.06 ± 0.01) mmol/L] of HFD and HFD + CUMS were both significantly higher than those of CON and CON + CUMS [(1.78 ± 0.12) mmol/L,(0.79 ± 0.04) mmol/L;(1.76 ±0.09)mmol/L,(0.76 ±0.06)mmol/L,all P <0.01].(2) Open-field test:at week 13,compared to CON rats,CON + CUMS rats exhibited enhanced locomotor activity during the first minute,reduced activity in the center squares and rearing,and increased the number of grooming and defecation (all P < 0.05).In comparison to the CON rats,a decrease in total squares in 5 min,central squares and peripheral squares was observed in HFD rats at week 13 (all P < 0.05).However,compared with HFD,CON,CON + CUMS rats,when high lipid feed for 9 weeks combined with depression,significant decrease activities in total squares in 5 min,central squares and peripheral squares were observed in HFD + CUMS rats at week 13.Besides these,the number of rearing was reduced,however,locomotor activity during the first minute and the number of grooming and defecation was significantly increased (all P < 0.001).Conclusion Under uncontrolled hyperlipidemia,severe depressive symptoms will present more early once exposure to a series of chronic stressors followed by significant autonomic nervous dysfunctional symptoms.%目的 观察高脂血症叠加抑郁症大鼠open-field行为学特征.方法 40只SD大鼠按随机数字表法

  15. Monitoring of all-cause mortality in Belgium (Be-MOMO): a new and automated system for the early detection and quantification of the mortality impact of public health events.

    Science.gov (United States)

    Cox, Bianca; Wuillaume, Françoise; Van Oyen, Herman; Maes, Sophie

    2010-08-01

    Be-MOMO is the monitoring of all-cause death registry data in Belgium. The new methods are described and the detection and quantification of outbreaks is presented for the period April 2006-March 2007. Sensitivity, specificity and timeliness are illustrated by means of a temporal comparison with known health events. Relevant events are identified from important mortality risks: climate, air pollution and influenza. Baselines and thresholds for deaths by gender, age group, day and week are estimated by the method of Farrington et al. (J R Stat Soc Ser A, 159:547-563, 1996). By adding seasonal terms to the basic model, a complete 5-year reference period can be used, while a reduction of noise allows the application to daily counts. Ignoring two false positives, all flags could be classified into five distinct outbreaks, coinciding with four heat periods and an influenza epidemic. Negative deviations from expected mortality in autumn and winter might reflect a displacement of mortality by the heat waves. Still, significant positive excess was found during five influenza weeks. Correcting for the delay in registration of deaths, outbreaks could be detected as soon as 1-2 weeks after the event. The sensitivity of Be-MOMO to different health threats suggests its potential usefulness in early warning: mortality thresholds and baselines might serve as rapid tools for detecting and quantifying outbreaks, crucial for public health decision-making and evaluation of measures.

  16. Efecto de la fertilización orgánica, la variedad y la época en el perfil polifenólico de Morus alba (L.

    Directory of Open Access Journals (Sweden)

    D. E. García

    2005-01-01

    Full Text Available Con el objetivo de detectar los principales grupos de fenoles en la biomasa de la morera y de-terminar el efecto del abonado (0, 100, 300 y 500 kg N/ha/año, la variedad (Cubana, Indonesia, Tigreada y Acorazonada y la época (periodo lluvioso y poco lluvioso, en el perfil polifenólico, se llevó a cabo una investigación con un diseño de bloques (al azar con arreglo factorial 4 x 4 x 2 y cinco repeticiones. Mediante el tamizaje fitoquímico se evaluó la presencia de siete grupos de compuestos, para posteriormente, determinar sus concentraciones. Únicamente se detectaron fenoles (FT, flavonoides (Flav y cumarinas (Cum, con presencia leve, notable o cuantiosa. Sólo se encontraron interacciones significativas entre los factores fertilización y variedad para los FT y las Cum (P<0,05. Los niveles máximos de FT y Cum encontrados en las hojas fueron de 2,86% MS (Tigreada abonada con 100 kg N/ha/año y 0,65% MS (Cubana e Indonesia fertilizadas con 100 kg N/ha/año, respectivamente. Las mayores concentraciones de FT y Cum en los tallos tiernos se observaron en la variedad Acorazonada con 100 kg N/ha/año (1,55% MS e Indonesia, con la aplicación de 500 kg N/ha/año (0,60% MS. En las hojas de las variedades (los contenidos de FT y Cum tendieron a disminuir con el incremento de los niveles de fertilización, a excepción de las concentraciones de FT, en la variedad Cubana. En el caso de los Flav, no se observó un efecto significativo de los factores fertilización, variedad y época. Solamente en los FT de las hojas, se observó un efecto representativo de la época a favor del PLL. Los resultados permiten concluir que las concentraciones de los FT se ven afectadas por los niveles de fertilización, la variedad y la época. Los contenidos de Cum presentan variaciones significativas entre los niveles de abonado orgánico y las variedades. Los niveles de Flav no muestran fluctuaciones cuantiosas con ninguna de las variables estudiadas.

  17. Chronic unpredictable mild stress generates oxidative stress and systemic inflammation in rats.

    Science.gov (United States)

    López-López, Ana Laura; Jaime, Herlinda Bonilla; Escobar Villanueva, María Del Carmen; Padilla, Malinalli Brianza; Palacios, Gonzalo Vázquez; Aguilar, Francisco Javier Alarcón

    2016-07-01

    Stress is considered to be a causal agent of chronic degenerative diseases, such as cardiovascular disease, diabetes mellitus, arthritis and Alzheimer's. Chronic glucocorticoid and catecholamine release into the circulation during the stress response has been suggested to activate damage mechanisms, which in the long term produce metabolic alterations associated with oxidative stress and inflammation. However, the consequences of stress in animal models for periods longer than 40days have not been explored. The goal of this work was to determine whether chronic unpredictable mild stress (CUMS) produced alterations in the redox state and the inflammatory profile of rats after 20, 40, and 60days. CUMS consisted of random exposure of the animals to different stressors. The following activities were measured in the liver and pancreas: reduced glutathione (GSH), lipid peroxidation (LPO), superoxide dismutase (SOD), catalase (CAT), total antioxidant capacity (TAC), and protein oxidation. Similarly, serum cytokine levels (IL-6, TNF-α, IL-1β, and IL-10) were determined. CUMS activated the stress response from day 20 until day 60. In the liver and pancreas, GHS levels were decreased from day 40, whereas protein lipid peroxidation and protein oxidation were increased. This is the first work to report that the pancreas redox state is subject to chronic stress conditions. The TAC was constant in the liver and reduced in the pancreas. An increase in the TNF-α, IL-1β, and IL-6 inflammatory markers and a decrease in the IL-10 level due to CUMS was shown, thereby resulting in the generation of a systemic inflammation state after 60days of treatment. Together, the CUMS consequences on day 60 suggest that both processes can contribute to the development of chronic degenerative diseases, such as cardiovascular disease and diabetes mellitus. CUMS is an animal model that in addition to avoiding habituation activates damage mechanisms such as oxidative stress and low-grade chronic

  18. Integration of ¹H NMR and UPLC-Q-TOF/MS for a comprehensive urinary metabonomics study on a rat model of depression induced by chronic unpredictable mild stress.

    Directory of Open Access Journals (Sweden)

    Hong-Mei Jia

    Full Text Available Depression is a type of complex psychiatric disorder with long-term, recurrent bouts, and its etiology remains largely unknown. Here, an integrated approach utilizing (1H NMR and UPLC-Q-TOF/MS together was firstly used for a comprehensive urinary metabonomics study on chronic unpredictable mild stress (CUMS treated rats. More than twenty-nine metabolic pathways were disturbed after CUMS treatment and thirty-six potential biomarkers were identified by using two complementary analytical technologies. Among the identified biomarkers, nineteen (10, 11, 16, 17, 21-25, and 27-36 were firstly reported as potential biomarkers of CUMS-induced depression. Obviously, this paper presented a comprehensive map of the metabolic pathways perturbed by CUMS and expanded on the multitude of potential biomarkers that have been previously reported in the CUMS model. Four metabolic pathways, including valine, leucine and isoleucine biosynthesis; phenylalanine, tyrosine and tryptophan biosynthesis; tryptophan metabolism; synthesis and degradation of ketone bodies had the deepest influence in the pathophysiologic process of depression. Fifteen potential biomarkers (1-2, 4-6, 15, 18, 20-23, 27, 32, 35-36 involved in the above four metabolic pathways might become the screening criteria in clinical diagnosis and predict the development of depression. Moreover, the results of Western blot analysis of aromatic L-amino acid decarboxylase (DDC and indoleamine 2, 3-dioxygenase (IDO in the hippocampus of CUMS-treated rats indicated that depletion of 5-HT and tryptophan, production of 5-MT and altered expression of DDC and IDO together played a key role in the initiation and progression of depression. In addition, none of the potential biomarkers were detected by NMR and LC-MS simultaneously which indicated the complementary of the two kinds of detection technologies. Therefore, the integration of (1H NMR and UPLC-Q-TOF/MS in metabonomics study provided an approach to identify

  19. Electron transfer properties of alkoxyl radicals. A time-resolved kinetic study of the reactions of the tert-butoxyl, cumyloxyl, and benzyloxyl radicals with alkyl ferrocenes.

    Science.gov (United States)

    Bietti, Massimo; DiLabio, Gino A; Lanzalunga, Osvaldo; Salamone, Michela

    2010-09-03

    A time-resolved kinetic study on the reactions of the tert-butoxyl (t-BuO*), cumyloxyl (CumO*), and benzyloxyl (BnO*) radicals with alkylferrocenes has been carried out in MeCN solution. With all radicals, clear evidence for an electron transfer (ET) process has been obtained, and with the same ferrocene donor, the reactivity has been observed to increase in the order t-BuO* < CumO* < BnO*, with the difference in reactivity approaching 3 orders of magnitude on going from t-BuO* to BnO*. With BnO*, an excellent fit to the Marcus equation has been obtained, from which a value of the reduction potential of BnO* (E degrees(BnO*/BnO(-)) = 0.54 V/SCE) has been derived. The latter value appears, however, to be significantly higher than the previously determined reduction potential values for alkoxyl radicals and in contrast with the differences in the computed solution-phase electron affinities determined for t-BuO*, CumO*, and BnO*, indicating that the reaction of BnO* with ferrocene donors may not be described in terms of a straightforward outer sphere ET mechanism. From these data, and taking into account the available value of the reduction potential for CumO*, a value of E degrees (BnO*/BnO(-)) = -0.10 V/SCE has been estimated. On the basis of computational evidence for the formation of a pi-stacked prereaction complex in the reaction between BnO* and DcMFc, an alternative ET mechanism is proposed for the reactions of both CumO* and BnO*. In these cases, the delocalized nature of the unpaired electron allows for the aromatic ring to act as an electron relay by mediating the ET from the ferrocene donor to the formal oxygen radical center. This hypothesis is also in line with the observation that both BnO* and CumO* react with the ferrocene donors with rate constants that are in all cases at least 2 orders of magnitude higher than those measured for t-BuO*, wherein the radical is well-localized.

  20. Composite fish culture for mosquito control in rice fields in southern India.

    Science.gov (United States)

    Victor, T J; Chandrasekaran, B; Reuben, R

    1994-09-01

    Composite culture of edible fishes (common carp, Cryprinus carpio; silver carp, Hypopthalmithys molitrix, grass carp, Ctenopharyngodon idella; catla, Catla catla; rohu, Labeo rohita; and mrigal, Cirrhinus mrigala) in rice fields in the Cauvery delta of Tamil Nadu, southern India, resulted in 81.0% reduction in the immature mosquito population of anophelines and 83.5% of culicines. Analysis of fish feces for mosquito larval head capsules showed that common carp and silver carp are effective larvivores. The selective feeding of common carp on culicines and silver carp on anophelines is correlated to their trophic niches. Net profit in the fish-cum-rice fields was 2.5 times greater than fields in which rice alone was cultured. Hence, rice-cum-fish culture can be recommended to the farming community in this area.

  1. Comparison of anatomical characteristics of leaves and flowers of Crataegus and some species of Rosaceae family

    Directory of Open Access Journals (Sweden)

    V.A. Kiryanova

    2014-04-01

    Full Text Available The present work shows the results of microscopy of Crataegus sanguinea Pall. leaves with flowers (Crataegi flores cum folia, which is considered as a perspective form of medicinal raw material, and the hypothetical plant adulterants – Amelanchier ovalis Medik., Prunus subgen. Cerasus (Mill. A. Gray, Pyrus communis L., Aronia melanocarpa (Michx. Elliott (Rosaceae. Parts of leaves and flowers of stated plants were subjected to anatomical investigation and comparative studies. Microscopical characteristics of leaves and flowers, which make possible to distinguish Crataegus from other species, were detected. The obtained data can be applied for the development of pharmacopoeial article “Crataegi Flores cum folia” for the XII edition of the Russian State Pharmacopoeia.

  2. Domain Endurants: An Analysis and Description Process Model

    DEFF Research Database (Denmark)

    Bjørner, Dines

    2014-01-01

    We present a summary, Sect. 2, of a structure of domain analysis and description concepts: techniques and tools. And we link, in Sect. 3, these concepts, embodied in domain analysis prompts and domain description prompts, in a model of how a diligent domain analyser cum describer would use them. ...... claim that both sections, Sects. 2–3, contribute to a methodology of software engineering.......We present a summary, Sect. 2, of a structure of domain analysis and description concepts: techniques and tools. And we link, in Sect. 3, these concepts, embodied in domain analysis prompts and domain description prompts, in a model of how a diligent domain analyser cum describer would use them. We...

  3. A reservoir for inverse power law decoherence of a qubit

    CERN Document Server

    Giraldi, Filippo

    2010-01-01

    The exact dynamics of a Jaynes-Cummings model for a qubit interacting with a continuous distribution of bosons, characterized by a special form of the spectral density, is evaluated analytically. The special reservoir is designed to induce anomalous decoherence, resulting in an inverse power law relaxation, of power $3/2$, over an evaluated long time scale. If compared to the exponential-like relaxation obtained from the original Jaynes-Cummings model for Lorentzian-type spectral density functions, decoherence is strongly suppressed. The special reservoir exhibits an upper band edge frequency coinciding with the qubit transition frequency. Known theoretical models of photonic band gap media suitable for the realization of the designed reservoir are proposed.

  4. Monitoring endemic livestock diseases using laboratory diagnosticdata: A simulation study to evaluate the performance of univariateprocess monitoring control algorithms

    DEFF Research Database (Denmark)

    Lopes Antunes, Ana Carolina; Dorea, Fernanda; Hisham Beshara Halasa, Tariq;

    2016-01-01

    (number of sentinel herds tested in the surveillance system) on the performance of the algorithms. Three univariate process monitoring control algorithms were compared: Shewart p Chart 1 (PSHEW), Cumulative Sum2 (CUSUM) and Exponentially Weighted Moving Average3 (EWMA). Increases in seroprevalence were......, it was possible to assess the accuracy and timeliness of the surveillance system working in real-time. The results showed that EWMA and PSHEW had higher CumSe (when compared with the CUSUM) from week 1 until the end of the period for all simulated scenarios. Changes in seroprevalence from 0.10 to 0.20 were more...... easily detected (higher CumSe) than changes from 0.10 to 0.15 for all three algorithms. Similar results were found with EWMA and PSHEW, based on the median time to detection. Changes in the seroprevalence were detected later with CUSUM, compared to EWMA and PSHEW for the different scenarios. Increasing...

  5. [Can bladder catheterization in pediatrics cause complications? The case of a urethral dysuria cystograph].

    Science.gov (United States)

    Alcázar García, A; Daviu Llorens, E; Daza Laguna, A; Durán Feliubadalo, C; Pons Torrents, X

    2009-10-01

    A urethral dysuria cystograph (CUMS (Cistografia Ureteral Miccional Seriada)) is the first diagnostic procedure, by means of x-rays, to evaluate bladder-urethral reflux. It consists of a bladder catheter to administer a radiopaque contrast dye through the ureter. To use the aforementioned technique without any asepsis measures and without knowledge about it can lead to possible complications. By means of a retrospective study using a sample of 181 patients, the authors have evaluated the incidence of possible complications and/or subsequent discomfort due to a urethral dysuria cystograph (CUMS). As final results, by means of an after test telephone call, the authors observed that 96.7% of the children who underwent this technique did not manifest any type of complication nor urinary discomfort.

  6. An Analysis of the E.E. Cummings’“L(a”

    Institute of Scientific and Technical Information of China (English)

    JIN Xiao

    2014-01-01

    E.E. Cummings is an American poet who is famous for his fantastic poems. L(a, one of his representative works, is a unique visual poem that shows Cummings’feeling of loneliness and takes readers into a sentimental scene. A great many research-es have been done on this poem focusing on the morphology, visual effects, tonality and Cummings ’inner world. However, a comprehensive literature review of this poem has hardly been made. Thus, this paper sums up some representative comments of these aspects, doing a literature review of it and then puts forward the author’s own interpretation to make a contribution to the future studies of the poem.

  7. Lie algebras for some specific dissipative Landau–Zener problems

    Energy Technology Data Exchange (ETDEWEB)

    Kenmoe, M.B. [Mesoscopic and Multilayer Structures Laboratory (MMSL), Faculty of Science, Department of Physics, University of Dschang (Cameroon); Mkam Tchouobiap, S.E., E-mail: esmkam@yahoo.com [Laboratory of Research on Advanced Materials and Nonlinear Science (LaRAMaNS), Department of Physics, Faculty of Sciences, University of Buea, PO Box 63, Buea (Cameroon); Danga, J.E.; Kenfack Sadem, C.; Fai, L.C. [Mesoscopic and Multilayer Structures Laboratory (MMSL), Faculty of Science, Department of Physics, University of Dschang (Cameroon)

    2015-03-20

    We demonstrate that some specific problems of Landau–Zener transitions in a qubit coupled to an environment (problems designed as dissipative) can be matched onto the frame of the original problem without dissipation, providing an appropriate Lie algebra. Focusing on the origin of quantum noises, the cases of bosonic and spin baths are considered and presented. Finally, making use of the algebra framework, the logic is shown in action for respectively two important additional quantum models, namely the Jaynes–Cummings and an isolated double quantum dots models. - Highlights: • A finite temperature result for dissipative Landau–Zener transitions in a qubit coupled to an environment is proposed. • The quantum noises for bosonic and spin baths are considered. • Lie algebras reduction method coupled to the separation method and the fast driving approximation is proposed. • Jaynes–Cummings and a double quantum dots models are studied as illustrations of the algebra.

  8. Role of brain-derived neurotrophic factor and neuronal nitric oxide synthase in stress-induced depression

    Institute of Scientific and Technical Information of China (English)

    Dan Wang; Shucheng An

    2008-01-01

    BACKGROUND: Accumulated evidence indicates an important role for hippocampal dendrite atrophy in development of depression, while brain-derived neurotrophic factor (BDNF) participates in hippocampal dendrite growth. OBJECTIVE: To discuss the role of BDNF and neuronal nitric oxide synthase (nNOS) in chronic and unpredictable stress-induced depression and the pathogenesis of depression.DESIGN, TIME AND SETTING: Randomized, controlled animal experiment. The experiment was carried out from October 2006 to May 2007 at the Department of Animal Physiology, College of Life Science, Shaanxi Normal University.MATERIALS: Thirty-seven male Sprague-Dawley rats weighing 250-300 g at the beginning of the experiment were obtained from Shaanxi Provincial Institute of Traditional Chinese Medicine (Xi'an, China). BDNF antibody and nNOS antibody were provided by Santa Cruz (USA). K252a (BDNF inhibitor) and 7-NI (nNOS inhibitor) were provided by Sigma (USA). METHODS: Animals were randomly divided into five groups: Control group, chronic unpredicted mild stress (CUMS) group, K252a group, K252a+7-NI group and 7-NI+CUMS group. While the Control, K252a and K252a+7-NI groups of rats not subjected to stress had free access to food and water, other groups of rats were subjected to nine stressors randomly applied for 21 days, with each stressor applied 2-3 times. On days 1, 7, 14 and 21 during CUMS, rats received microinjection of 1 μL of physiological saline in the Control and CUMS groups, 1 μL of K252a in the K252a group, 1 μL of K252a and 7-NI in the K252a+7-NI group, and 1 μL of 7-NI in the 7-NI+CUMS group. We observed a variety of alterations in sucrose preference, body weight change, open field test and forced swimming test, and observed the expression of BDNF and nNOS in rat hippocampus by immunohistochemistry;RESULTS: Compared with the Control group, the behavior of the CUMS rats was significantly depressed, the expression of BDNF decreased (P < 0.01) but the expression of n

  9. Constant delivery temperature solar water heater - an integrated approach

    Energy Technology Data Exchange (ETDEWEB)

    Kumar, S. [C.A.S. Indian Institute of Technology, New Delhi (India); Kumar, N. [D.C.E. Muzaffarpur Institute of Technology, Bihar (India)

    1997-05-01

    An integrated model of a constant delivery temperature solar water heat-cum-active regenerative distillation system has been developed. The water used for the regenerative effect in the distiller of the proposed system is subsequently fed to the basin-cum-storage tank of the still through the heat exchanger (connected to the collector). The model varies the water mass flow rate in order to maintain a constant outlet temperature. With minor modifications in the solar water heater, the extra energy stored in the water mass due to non-utilization of capacity and/or non-linear utilization of capacity can be efficiently utilized for distillation purposes. In this process, the latent heat of vaporization is used for preheating the inlet water supply to the heat exchanger. The effect of insulation on maintaining the hot water temperature and distillate output is also presented. (Author)

  10. Formulation of a Combined Transportation and Inventory Optimization Model with Multiple Time Periods

    Directory of Open Access Journals (Sweden)

    G.Krishnakumari,

    2016-03-01

    Full Text Available Most distribution network design models existing in the literature have focused on minimizing the costs of inventory and transportation. During the analysis of supply chain of currency management problem it is observed that the transportation of currency from various sources to various destinations and the required inventory to be maintained to meet the emerging demands requires formulation of a combined problem. This framework aims to support the coordination of inventory and transportation activities to properly manage the inventory profiles and currency flows between source locations and distribution centers. This paper considers a multi-period inventory and transportation model for a single commodity. The key contribution of this paper is, a mathematical programming formulation of transportation cum inventory problem is proposed and an algorithm for this new formulation as a multi period decision process is intended. A numerical example of currency transportation cum inventory is presented to illustrate the proposed algorithm

  11. [A new SVRDF 3D-descriptor of amino acids and its application to peptide quantitative structure activity relationship].

    Science.gov (United States)

    Tong, Jian-Bo; Zhang, Sheng-Wan; Cheng, Su-Li; Li, Gai-Xian

    2007-01-01

    To establish a new amino acid structure descriptor that can be applied to polypeptide quantitative structure activity relationship (QSAR) studies, a new descriptor, SVRDF, was derived from a principal components analysis of a matrix of 150 radial distribution function index of amino acids. The scale was then applied in three panels of peptide QSAR that were molded by partial least squares regression. The obtained models with the correlation coefficients (R2(cum)), cross-validation correlation coefficients (Q2(cum)) were 0.766 and 0.724 for 48 bitter tasting dipeptides; 0.941 and 0.811 for 21 oxytocin analogues; 0.996 and 0.919 for 20 thromboplastin inhibitors. Satisfactory results showed that information related to biological activity can be systemically expressed by SVRDF scales, which may be an useful structural expression methodology for the study of peptides QSAR.

  12. Quantum Entropic Dynamics of a Trapped Ion in a Standing Wave

    Institute of Scientific and Technical Information of China (English)

    FANG Mao-Fa; ZHOU Peng; S. Swain

    2000-01-01

    By performing a unitary transformation, we transform the Hamiltonian of the trapped ion in any position of standing wave to that of the normal Jaynes-Cummings model in ionic bare basis and we obtain a general evolution operator of the trapped ion system. We study the quantum entropic dynamics of the phonons and trapped ion.Our results show that, when the trapped ion is located at the node of standing wave, the quantum entropic dynamics of phonons and trapped ion are the same as the one of the field in the Jaynes-Cummings model.When the trapped ion deviatesfrom the node of standing wave, the entropies of the phonons and ion keep their maximum value except at the initial stage, and the phonons and trapped ion become extremely entangled.

  13. Approximate and Conditional Teleportation of an Unknown Atomic State Without Bell-State Measurement with Two-Photon Interaction

    Institute of Scientific and Technical Information of China (English)

    CHEN Chang-Yong

    2006-01-01

    A scheme for approximately and conditionally teleporting an unknown atomic state via two-photon interaction in cavity QED is proposed. It is the extension of the scheme of Ref. [11] [Phys. Rev. A 69 (2004) 064302], which is based on Jaynes-Cummings model in QED and where only a time point of system evolution and the corresponding fidelity implementing the teleportation are given. In our scheme, the two-photon interaction Jaynes-Cummings model is used to realize the approximate and conditional teleportation. Our scheme does not involve the Bell-state measurement and an additional atom, only requiring two atoms and one single-mode cavity. The fidelity of the scheme is higher than that of Ref. [11]. The scheme may be generalized to not only the teleportation of the state of a cavity mode to another mode by means of a single atom but also the teleportation of the state of a trapped ion.

  14. Reinnervation of Paralyzed Muscle by Nerve Muscle Endplate Band Grafting

    Science.gov (United States)

    2016-10-01

    reinnervation of paralyzed laryngeal and facial muscles11,12 as well as the extremities.8,10 However, further studies are needed to determine the...noninnervated endplates of the operated and unoperated SMmuscles in each rat were computed. The variables of the reinnervated SM muscles were expressed as...Brunelli G, Brunelli LM. Direct neurotization of severely damaged denervated muscles. Int Surg 1980;65(6):529–531 11 Hall SJ, Trachy RE, Cummings CW. Facial

  15. A Survey Comparing the M2/3 Bradley Fighting Vehicle and the M113 Armored Personnel Carrier by Members of the NTC (National Training Center) Operations Group and OPFOR (Opposing Force)

    Science.gov (United States)

    1988-04-01

    gathered 2were analyzed using the statistical analysis package, W-6 SAS, on the IBM 3033.2 Frequencies, means, and standard deviations were calculated ...66 19 504, 5 4 7 1 13 89 20.354 78.7612 4 113 21239 100.000 Q28 FRE)UESCY CUM CREQ PERCENT CUv PERCENT -2 152 151 29577 7%4230 45 125 179606 88.O80

  16. Strategies for Corporate Global Expansion of Pakistani Companies in the Age of Technology

    OpenAIRE

    Jawaid Ahmed Qureshi; Amanat Ali Jalbani

    2015-01-01

    This study intends to meticulously probe about the applications of cutting-edge strategies of globally expanding companies operative in several industrial sectors of Pakistan. Many companies craft and execute various strategies to globalize their operations and networks in several continents, which can not only benefit them but add value in the domestic cum global economy. Many researchers expounded that along with many other factors, capacity-building and competitive edges of business provid...

  17. Implications for Advanced Nursing Practice in the Patient with Heat Stress

    Science.gov (United States)

    1993-05-01

    eat salty foods, get bedrest for a day or two, and drink plenty of fluids (Hayes, 1984). Oral salt solutions (one teaspoon of salt per eight ounces of...resuscitation, temperature reduction, isotonic fluid replacement, monitoring (cardiac and central line), accurate urine output measurement. and laboratory...prevention (Cummings, 1983). This method has other disadvantages . Increased vasoconstriction and shivering can lead to increases in muscle metabolism and

  18. Dicty_cDB: SHC526 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available cum aestivum cDNA clone:whf22g24, 3' end, single read. 44 3.2 1 CD453775 |CD453775.1 WHE2108_D02_H04ZT CS wheat salt-stressed crown...one G750108G22, mRNA sequence. 44 3.2 1 BQ487459 |BQ487459.1 WHE2108_D02_H04ZY Wheat salt-stressed crown

  19. Global Ocean Forecast System V3.0 Validation Test Report Addendum: Provision of Boundary Conditions to the Relocatable Navy Coastal Ocean Model (NCOM)

    Science.gov (United States)

    2012-03-21

    8217 = baro . strmfn. I/O unit (0 no I/O) 0 ’uvmio ’ = mix. lay. u-vel. I/O unit (0 no I/O) 0 ’vvmio ’ = mix. lay. v-vel. I/O unit (0 no I...NCODA: Phase II. NRL Memo. Report, NRL/MR/7320--10-9236. Rowley, C., P.J. Martin and J.A. Cummings, 2010: The Naval Research Laboratory Relocatable

  20. Realization of the Dicke model using cavity-assisted Raman transitions

    CERN Document Server

    Baden, Markus P; Grimsmo, Arne L; Parkins, Scott; Barrett, Murray D

    2014-01-01

    We realize an open version of the Dicke model by coupling two hyperfine ground states using two cavity-assisted Raman transitions. The interaction due to only one of the couplings is described by the Tavis-Cummings model and we observe a normal mode splitting in the transmission around the dispersively shifted cavity. With both couplings present the dynamics are described by the Dicke model and we measure the onset of superradiant scattering into the cavity above a critical coupling strength.

  1. Realization of the Dicke model using cavity-assisted Raman transitions.

    Science.gov (United States)

    Baden, Markus P; Arnold, Kyle J; Grimsmo, Arne L; Parkins, Scott; Barrett, Murray D

    2014-07-11

    We realize an open version of the Dicke model by coupling two hyperfine ground states using two cavity-assisted Raman transitions. The interaction due to only one of the couplings is described by the Tavis-Cummings model and we observe a normal mode splitting in the transmission around the dispersively shifted cavity. With both couplings present the dynamics are described by the Dicke model and we measure the onset of superradiant scattering into the cavity above a critical coupling strength.

  2. Fourteen-Day Feeding Study of 2,4-Dinitrotoluene in Male and Female Rats

    Science.gov (United States)

    1983-02-01

    mEioTO OF I wov 6" is ONOL•TE UNCLASSIFIED SECUMTY CLASIFICATION OF THIS PAGE (We Date Enterod) UNCLARIP i Pij s6cumITY CLASSaFICATION OP THIS PA@a0...before scheduled necropsy. Urines were evaluaced for the following: color, specific gravity, urobilinogen, occult blood, bile, ketones, glucose, protein ...5 males, 1/4 females). Staining characteristics of the droplets indicate that they contain proteinic material. This lesion is compound related, but

  3. Current and emerging treatment strategies for Duchenne muscular dystrophy

    OpenAIRE

    Mah JK

    2016-01-01

    Jean K Mah Department of Pediatrics and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada Abstract: Duchenne muscular dystrophy (DMD) is the most common form of muscular dystrophy in childhood. It is caused by mutations of the DMD gene, leading to progressive muscle weakness, loss of independent ambulation by early teens, and premature death due to cardiorespiratory complications. The diagnosis can usually be made after careful review of the...

  4. The rapid antidepressant effect of ketamine in rats is associated with down-regulation of pro-inflammatory cytokines in the hippocampus

    OpenAIRE

    Wang, Nan; Yu, Hai-Ying; Shen, Xiao-Feng; Gao, Zhi-Qin; Yang, Chun; Yang, Jian-Jun; Zhang, Guang-Fen

    2015-01-01

    Objectives. Active inflammatory responses play an important role in the pathogenesis of depression. We hypothesized that the rapid antidepressant effect of ketamine is associated with the down-regulation of pro-inflammatory mediators. Methods. Forty-eight rats were equally randomized into six groups (a control and five chronic unpredictable mild stress (CUMS) groups) and given either saline or 10 mg/kg ketamine, respectively. The forced swimming test was performed, and the hippocampus was sub...

  5. 2010 CERT Research Report

    Science.gov (United States)

    2011-09-01

    implementation. References [1] I. Jurisica et al., “Using ontologies for knowledge management: An information systems perspective,” in Proc. ASIS Annual...2010, San Francisco , CA, 4 March 2010. Cappelli, D.M., Cummings, A.B., “Monitoring Strategies for Detection of Insider Attacks,” GFIRST Conference...San Francisco , CA, 3 March 2010. Lead Instructor, “Cyber Readiness Exercise”, pre-conference GFIRST, San Antonio, Texas, August 15-16, 2010

  6. Behavioral Responses of Catnip (Nepeta cataria) by Two Species of Mosquitoes, Aedes aegypti and Anopheles harrisoni, in Thailand

    Science.gov (United States)

    2008-01-01

    Thymus vulgaris L.), clove (Syzygium aromati- cum L.), and catnip (Nepeta cataria L.), were tested as alternative topical mosquito repellents (Barnard...Laborato- ry, Plant Science Institute, USDA-ARS, Beltsville, MD 20705. 4 Department of Entomology, Faculty of Agriculture, Kasetsart University...a promising plant derived compound from catnip (Peterson and Coats 2001). Chemicals protect human from the bite of mosquitoes in 3 different ways

  7. 论美国意象派诗歌的视觉性特点%Seeing character of American imagism of peotry

    Institute of Scientific and Technical Information of China (English)

    王阿晶; 马雅萍

    2004-01-01

    通过对美国诗人埃兹拉.庞德(Ezra Pound)、威廉.卡洛斯.威廉姆斯(William CarlosWilliams)和卡明斯(e.e.Cummings)诗歌中呈现的事物本身及其词汇、段落的独到安排的分析,详细阐述意象派诗歌的鲜明的视觉性特点.

  8. Effects of Load, Cognitive Complexity and Type A on Satisfaction.

    Science.gov (United States)

    1983-06-01

    control and organizational democracy. Washington, D.C. Victor H . Winston and Sons and Halsted Division, John Wiley and Sons, 1978. . Streufert, S...Time urgency and coronary prone behavior: The effectiveness of a behavior pattern. Basic and Applied Social Psychology, 1981, 2, 161-174. Vroom , V. H ...King,1970; Locke, 1976; Mitchell, 1974, Neuberger, 1974-: Schwab and Cummings, 1970; Smith and Cranny, 1968, Vroom , 1964; Wanous and Lawler, 1972

  9. Chronic Stress Contributes to Cognitive Dysfunction and Hippocampal Metabolic Abnormalities in APP/PS1 Mice

    Directory of Open Access Journals (Sweden)

    Bing Han

    2017-03-01

    Full Text Available Background/Aims: Stress response is determined by the brain, and the brain is a sensitive target for stress. Our previous experiments have confirmed that once the stress response is beyond the tolerable limit of the brain, particularly that of the hippocampus, it will have deleterious effects on hippocampal structure and function; however, the metabolic mechanisms for this are not well understood. Methods: Here, we used morris water maze, elisa and gas chromatography-time of flight/mass spectrometry to observe the changes in cognition, neuropathology and metabolomics in the hippocampus of APP/PS1 mice and wild-type (C57 mice caused by chronic unpredictable mild stress (CUMS, we also further explored the correlation between cognition and metabolomics. Results: We found that 4 weeks of CUMS aggravated cognitive impairment and increased amyloid-β deposition in APP/PS1 mice, but did not affect C57 mice. Under non-stress conditions, compared with C57 mice, there were 8 different metabolites in APP/PS1 mice. However, following CUMS, 3 different metabolites were changed compared with untreated C57 mice. Compared to APP/PS1 mice, there were 7 different metabolites in APP/PS1+CUMS mice. Among these alterations, 3-hydroxybutyric acid, valine, serine, beta-alanine and o-phosphorylethanolamine, which are involved in sphingolipid metabolism, synthesis and degradation of ketone bodies, and amino acid metabolism. Conclusion: The results indicate that APP/PS1 mice are more vulnerable to stress than C57 mice, and the metabolic mechanisms of stress-related cognitive impairment in APP/PS1 mice are related to multiple pathways and networks, including sphingolipid metabolism, synthesis and degradation of ketone bodies, and amino acid metabolism.

  10. Luck Is Not a Strategy: Inefficient Coercion In Operation Allied Force

    Science.gov (United States)

    2015-12-01

    third parties like Russia . Transcribed interviews with the Yugoslav general Nebosja Pavkovic, the Russian envoy Viktor Chernomyrdin, and with Vladimir ...International Monetary Fund, but just as crucial was their need to protect their prestige on the world stage.183 Vladimir Putin , then Secretary of the...182 Mary Buckley, “Russian Perceptions,” in Kosovo: Perceptions of War, ed. Buckley and Cummings, 161. 183 Ibid., 156. 184 Vladimir Putin , with

  11. Donald R. Nielsen New WRR Editor

    Science.gov (United States)

    Robb, David W.

    Bridging the gap between the disciplines of engineering and agriculture is a major goal for Water Resources Research (WRR), says Donald R. Nielsen, who was appointed to a 4-year term as WRR editor, effective January 1, 1985. Nielsen succeeds Stephen J. Burges as the WRR editor for hydrology, physical, chemical, and biological sciences. Ronald G. Cummings, at the University of New Mexico, is the WRR editor for policy sciences, including economics, systems analysis, sociology, and law.

  12. Better Video - Streaming Lessons among Palestinian Teachers

    OpenAIRE

    Ali H. AbuSaada; Soon Fook Fong

    2013-01-01

    This study aimed to investigate the effects of redundant information in video streaming of ICDL course for Palestinian trainee-teachers. Two modes of video streaming were used, namely video and narration (VN) mode, and video and narration cum text (VTN) mode of ICDL course. The sample consisted of 203 trainee-teachers in the National Institute for Training (NIT) in Gaza. The results showed that redundancy in the VTN mode increases cognitive overload and split attentions; hence inhibiting the ...

  13. Synchronization between uncertain nonidentical networks with quantum chaotic behavior

    Science.gov (United States)

    Li, Wenlin; Li, Chong; Song, Heshan

    2016-11-01

    Synchronization between uncertain nonidentical networks with quantum chaotic behavior is researched. The identification laws of unknown parameters in state equations of network nodes, the adaptive laws of configuration matrix elements and outer coupling strengths are determined based on Lyapunov theorem. The conditions of realizing synchronization between uncertain nonidentical networks are discussed and obtained. Further, Jaynes-Cummings model in physics are taken as the nodes of two networks and simulation results show that the synchronization performance between networks is very stable.

  14. Ocean Data Impacts in Global HYCOM

    Science.gov (United States)

    2014-08-01

    Ocean Data Impacts in Global HYCOM* JAMES A. CUMMINGS Oceanography Division, Naval Research Laboratory, Monterey, California OLE MARTIN SMEDSTAD...separated into horizontal and vertical components. Horizontal corre- lation length scales are proportional to the first baro - clinic Rossby radius of...review and amodel with a nonlocal boundary layer parameterization.Rev. Geophys., 32, 363–403, doi:10.1029/ 94RG01872. Lea, D. J., M. J. Martin , and P

  15. Eddy-Resolving Global Ocean Prediction

    Science.gov (United States)

    2009-07-01

    Cummings, Ahmet Birol Kara, E. Joseph Metzger, Jay Shriver, Ole Martin Smedstad, Alan J. Wallcraft, Charlie N. Barron 5d. PROJECT NUMBER 5e...8217, Alan J. Wallcraft’. and Charlie N. Barron’ ’Naval Research Laboratory: Oceanography Division. Stennis Space Center. Mississippi. I SA 1Centerfor...Distribution and move- ment of Gulf Stream rings. J. Phys. Oceanogr. 7(5), 670 683. Large. W. G.. G. Danabasoglu. S. C. Doney. and J. C. McWilliams

  16. A Programmatic Approach to Determine Eligibility of Prehistoric Sites in the San Diego Subregion, Southern Coast Archeological Region, California, for the National Register of Historic Places

    Science.gov (United States)

    2007-08-01

    ground stone fragment revealed the tool might have been used to process Chenopodium, Amaranthus, or possibly Poaceae seeds (Cummings 1993). Many of...mainland coast. Similarly, technological details related to changes in the morphology of bedrock milling have been tied closely to specific types of plant...4. Can the relationship between bedrock milling features and resources utilized be defined? True (1966) asserted that the morphology of bedrock

  17. Policy and Profit Allocation for the Cooperative Development of Natural Gas Resource on Chinese Offshore Continental Shelf

    Institute of Scientific and Technical Information of China (English)

    Zhou Qingsong; Zhang Mingzhi

    1994-01-01

    @@ Rich natural gas resources on Chinese offshore continental shelf China has a wide sea waters with their offshore continental shelf covering over 1 million km2. Rich oil-gas resources are lying under the sea waters. In accordance with the conventional international assessment method for oil and gas resources, it is expected that the gas reserve volume in China is approximately 14 000 billion cu.m.

  18. Chronic Stress Contributes to Cognitive Dysfunction and Hippocampal Metabolic Abnormalities in APP/PS1 Mice.

    Science.gov (United States)

    Han, Bing; Wang, Jin-Hua; Geng, Yuan; Shen, Li; Wang, Hua-Long; Wang, Yan-Yong; Wang, Ming-Wei

    2017-01-01

    Stress response is determined by the brain, and the brain is a sensitive target for stress. Our previous experiments have confirmed that once the stress response is beyond the tolerable limit of the brain, particularly that of the hippocampus, it will have deleterious effects on hippocampal structure and function; however, the metabolic mechanisms for this are not well understood. Here, we used morris water maze, elisa and gas chromatography-time of flight/mass spectrometry to observe the changes in cognition, neuropathology and metabolomics in the hippocampus of APP/PS1 mice and wild-type (C57) mice caused by chronic unpredictable mild stress (CUMS), we also further explored the correlation between cognition and metabolomics. We found that 4 weeks of CUMS aggravated cognitive impairment and increased amyloid-β deposition in APP/PS1 mice, but did not affect C57 mice. Under non-stress conditions, compared with C57 mice, there were 8 different metabolites in APP/PS1 mice. However, following CUMS, 3 different metabolites were changed compared with untreated C57 mice. Compared to APP/PS1 mice, there were 7 different metabolites in APP/PS1+CUMS mice. Among these alterations, 3-hydroxybutyric acid, valine, serine, beta-alanine and o-phosphorylethanolamine, which are involved in sphingolipid metabolism, synthesis and degradation of ketone bodies, and amino acid metabolism. The results indicate that APP/PS1 mice are more vulnerable to stress than C57 mice, and the metabolic mechanisms of stress-related cognitive impairment in APP/PS1 mice are related to multiple pathways and networks, including sphingolipid metabolism, synthesis and degradation of ketone bodies, and amino acid metabolism. © 2017 The Author(s)Published by S. Karger AG, Basel.

  19. The involvement of homocysteine in stress-induced Aβ precursor protein misprocessing and related cognitive decline in rats.

    Science.gov (United States)

    Xie, Fang; Zhao, Yun; Ma, Jing; Gong, Jing-Bo; Wang, Shi-Da; Zhang, Liang; Gao, Xiu-Jie; Qian, Ling-Jia

    2016-09-01

    Chronic stress is a risk factor in the development of cognitive decline and even Alzheimer's disease (AD), although its underlying mechanism is not fully understood. Our previous data demonstrated that the level of homocysteine (Hcy) was significantly elevated in the plasma of stressed animals, which suggests the possibility that Hcy is a link between stress and cognitive decline. To test this hypothesis, we compared the cognitive function, plasma concentrations of Hcy, and the brain beta-amyloid (Aβ) level between rats with or without chronic unexpected mild stress (CUMS). A lower performance by rats in behavioral tests indicated that a significant cognitive decline was induced by CUMS. Stress also disturbed the normal processing of Aβ precursor protein (APP) and resulted in the accumulation of Aβ in the brains of rats, which showed a positive correlation with the hyperhomocysteinemia (HHcy) that appeared in stressed rats. Hcy-targeting intervention experiments were used to verify further the involvement of Hcy in stress-induced APP misprocessing and related cognitive decline. The results showed that diet-induced HHcy could mimic the cognitive impairment and APP misprocessing in the same manner as CUMS, while Hcy reduction by means of vitamin B complex supplements and betaine could alleviate the cognitive deficits and dysregulation of Aβ metabolism in CUMS rats. Taken together, the novel evidence from our present study suggests that Hcy is likely to be involved in chronic stress-evoked APP misprocessing and related cognitive deficits. Our results also suggested the possibility of Hcy as a target for therapy and the potential value of vitamin B and betaine intake in the prevention of stress-induced cognitive decline.

  20. Global Modeling of Internal Tides Within an Eddying Ocean General Circulation Model

    Science.gov (United States)

    2012-06-01

    topography take the form of internal waves (waves along interfaces between fluids of differing densities), which are the subject of this special ...Southern Africa, and the Antarctic Circumpolar Current in the Southern Ocean (Schmitz, 1996a,b; Siedler et al., 2001). On timescales of about 10–200...Coupled Ocean Data Assimilation system (NCODA; Cummings, 2005) to provide a statistical Oceanography | Vol. 25, No. 224 blending of model and

  1. Uniform versus Gaussian Beams: A Comparison of the Effects of Diffraction, Obscuration, and Aberations.

    Science.gov (United States)

    1985-12-16

    beams D0 FOR 1473 UNCLASSIFIED SECURITY CLASSIFICATION OF THIS PAGE (Wen Dese Entered UNCLASSIFIED I[CUmI ’y CL A SSICATION 0 r T "IS P*GC/"h4. DA,. I...plotted on a logarithmic scale (Figs. 3c and 3d ). The positions of maxima and minima and the correspond- ing irradiance and encircled-power values are

  2. Real ID and the Security of State Identity Documents: The Long, Rocky, and Incomplete Journey Toward Full Implementation

    Science.gov (United States)

    2014-03-01

    legislation required that to cross the border between the United States and Canada, or between the United States and Mexico , persons seeking to do so...technology to enable a number of documents to be acceptable for WHITI purposes. Among those documents are 212 Udi Ofer, Ari Rosmarin, and Michael...Identifiers in 2D Barcodes for Improved Security.” Computers and Security 23, no. 8 (December 2004). Ofer, Udi , Ari Rosmarin, and Michael Cummings. No

  3. Reactions of the cumyloxyl and benzyloxyl radicals with tertiary amides. Hydrogen abstraction selectivity and the role of specific substrate-radical hydrogen bonding.

    Science.gov (United States)

    Salamone, Michela; Milan, Michela; DiLabio, Gino A; Bietti, Massimo

    2013-06-21

    A time-resolved kinetic study in acetonitrile and a theoretical investigation of hydrogen abstraction reactions from N,N-dimethylformamide (DMF) and N,N-dimethylacetamide (DMA) by the cumyloxyl (CumO(•)) and benzyloxyl (BnO(•)) radicals was carried out. CumO(•) reacts with both substrates by direct hydrogen abstraction. With DMF, abstraction occurs from the formyl and N-methyl C-H bonds, with the formyl being the preferred abstraction site, as indicated by the measured kH/kD ratios and by theory. With DMA, abstraction preferentially occurs from the N-methyl groups, whereas abstraction from the acetyl group represents a minor pathway, in line with the computed C-H BDEs and the kH/kD ratios. The reactions of BnO(•) with both substrates were best described by the rate-limiting formation of hydrogen-bonded prereaction complexes between the BnO(•) α-C-H and the amide oxygen, followed by intramolecular hydrogen abstraction. This mechanism is consistent with the very large increases in reactivity measured on going from CumO(•) to BnO(•) and with the observation of kH/kD ratios close to unity in the reactions of BnO(•). Our modeling supports the different mechanisms proposed for the reactions of CumO(•) and BnO(•) and the importance of specific substrate/radical hydrogen bond interactions, moreover providing information on the hydrogen abstraction selectivity.

  4. Impacts of Sampling and Handling Procedures on DNA- and RNA-based Microbial Characterization and Quantification of Groundwater and Saturated Soil

    Science.gov (United States)

    2012-07-01

    and shipped on ice (Hendrickson et al., 2002; Major et al., 2002; Macbeth et al., 2004). Alternatively, groundwater is filtered and frozen...2002; Dennis et al., 2003; Macbeth et al., 2004; Freeborn et al., 2005; Grostern and Edwards, 2006; Rahm et al., 2006). PCR was performed using... Macbeth , T. W., D. E. Cummings, S. Spring, L. M. Petzke, and K. S. Sorenson. 2004. Molecular characterization of a dechlorinating community resulting

  5. Community-Assisted Urban Sustainable Organic and Ecological Agriculture in the Philippines: Experiential Learnings and the Ways Forward

    OpenAIRE

    Catedral, Isagani; Villegas, Pablito

    2014-01-01

    The Kasama Ka Organik Koop is a staunch advocate in the promotion of Sustainable Organic and Ecological Agriculture and farming systems. The establishment of urban techno-demo organic gardens cum livelihood and entrepreneurship development center is one of the hands-on strategies adopted. The farm has been envisaged to serve as an eco-tourism venue to promote environmental awareness and knowledge, and livelihood and employment opportunities to the community.

  6. An Evaluation of Leadership and Management Training in the United States Coast Guard

    Science.gov (United States)

    1982-07-06

    cognition, behavior, performance, Center, Cameron Sta., Alexandria, Va. reward structure, social learning theory . 1o. Security Cloe .d. (oi le w se’ue...Lheory (Vroom, 19641 Galbraith and Cummings, 1967; Porter and Lawler, 1968; Graen, 1969). Figure 4-1 depicts the basic factors in social learning theory (Bandura...results. If the social learning theory of individual change is valid, a training prognam designed to impact the behaviors of supervisors and managers

  7. Identifying and Quantifying Emergent Behavior Through System of Systems Modeling and Simulation

    Science.gov (United States)

    2015-09-01

    EMERGENT BEHAVIOR THROUGH SYSTEM OF SYSTEMS MODELING AND SIMULATION by Mary Ann Cummings September 2015 Dissertation Supervisor: Man-Tak Shing...COVERED Ph.D. Dissertation 4. TITLE AND SUBTITLE IDENTIFYING AND QUANTIFYING EMERGENT BEHAVIOR THROUGH SYSTEM OF SYSTEMS MODELING AND SIMULATION 5...functionality and interfaces in these SoSs. An inherent deficiency of existing M&S approaches, however, lies in the emergent behavior that occurs as a result of

  8. Workshop: Conserving woodland caribou in the managed forest

    Directory of Open Access Journals (Sweden)

    George Hamilton et al.

    1998-03-01

    Full Text Available A workshop was held August 19 to foster discussion and debate on issues related to conservation of woodland caribou in the managed forest. Six panelists were invited to make brief presentations on their points of view on this subject. They were Don Thomas (Canadian Wildlife Service; Hartley Multimaki (Buchanan Forest Products; Colin Edey (NOVA Corporation; Jerry English (Ontario Ministry of Natural Resources - retired; Dale Seip (British Columbia Ministry of Forests and Harold Cumming (Lakehead University - retired.

  9. Control of Sudden Death of Entanglement by Transient Effects

    Institute of Scientific and Technical Information of China (English)

    Hunkar Kayhan

    2011-01-01

    We investigate the properties of entanglement between an isolated atom and a Jaynes-Cummings atom in the presence of transient effects. These effects are due to the modulation of the atom-field coupling whose explicit time-dependence is considered for the case of the linear sweep. We show that the sudden death of entanglement can be controlled by the transient effects. These effects can suppress the sudden death of entanglement in time.

  10. A Synopsis of Marine Animal Underwater Sounds in Eight Geographic Areas

    Science.gov (United States)

    1971-05-28

    34. Since then we have found that migrating gray whales produce moans, under- water sounds associated with their blows, and knocking sounds. Moans last...the whales are in a given area, usually as they migrate past, between their summer sojourns to polar waters and their winter movements toward the...its vocali- zations are available from Dr. W. C. Cummings, NUC Code 5054. : ii V, , 71 Delphinapterus leucas--(white- whale or beluga ) The beluga is

  11. Process development for gelatinisation and enzymatic hydrolysis of starch at high concentrations

    OpenAIRE

    2007-01-01

    cum laude graduation (with distinction) Enzymatic hydrolysis of starch is encountered in day-to-day life for instance in the dishwasher during removal of stains with detergents or in our mouth during chewing of starch-based foods in the presence of saliva. The reaction is also important for the (food) industry, for example for the production of beer or bio-ethanol. In industry, it is usually preceded by gelatinisation to make the starch molecules available for the enzymes. Both gelatinisation...

  12. The Spectrum in Qubit-Oscillator Systems in the Ultrastrong Coupling Regime

    Institute of Scientific and Technical Information of China (English)

    CHEN Qing-Hu; LI Lei; LIU Tao; WANG Ke-Lin

    2012-01-01

    Recent measurement on an LC resonator magnetically coupled to a superconducting qubit[Phys. Rev. Lett. 105 (2010) 237001] shows that the system operates in the ultra-strong coupling regime and crosses the limit of validity for the rotating-wave approximation of the Jaynes-Cummings model. By using extended bosonic coherent states, we solve the Jaynes-Cummings model exactly without using the rotating-wave approximation. Our numerically exact results for the spectrum of the flux qubit coupled to the LC resonator are fully consistent with the experimental observations. The smallest Bloch-Siegert shift obtained is consistent with that observed in this experiment. In addition, the Bloch-Siegert shifts in arbitrary level transitions and for arbitrary coupling constants are predicted.%Recent measurement on an LC resonator magnetically coupled to a superconducting qubit [Phys.Rev.Lett.105 (2010)237001] shows that the system operates in the ultra-strong coupling regime and crosses the limit of validity for the rotating-wave approximation of the Jaynes-Cummings model By using extended bosonic coherent states,we solve the Jaynes-Cummings model exactly without using the rotating-wave approximation.Our numerically exact results for the spectrum of the flux qubit coupled to the LC resonator are fully consistent with the experimental observations.The smallest Bloch-Siegert shift obtained is consistent with that observed in this experiment.In addition,the Bloch-Siegert shifts in arbitrary level transitions and for arbitrary coupling constants are predicted.

  13. 50 years of optics research [Invited].

    Science.gov (United States)

    Schwider, Johannes

    2013-01-01

    The 50-year life span of Applied Optics covers also approximately the time I have been engaged in optics. I started in 1962 [1] with the Institute for Optics and Spectroscopy, which was one of several Academy Institutes (mission statement: "theoria cum praxi," G. Leibniz) located in Berlin-Adlershof on the area of the first airfield in Berlin dating back to the beginning of the 20th century.

  14. Erosion Control of Scour during Construction; Report 3. Experimental Measurements of Refraction, Diffraction, and Current Patterns Near Jetties.

    Science.gov (United States)

    1980-09-01

    predict the probable magnitude of (Continued) DD vi’Ra 03 1wom or INov OM @ISDETR Unclassified S.CUm TY CLAS-.lCATIO OF THIS PAS.. (..m 0. Yw...transport of the bottom material at the particular site. The purpose of this study was to obtain detailed and precise experimental data regarding wave...currents. This removal of material from around structures is often not compensated by an influx of additional material ; the result is scour, or

  15. Representing Autonomous Systems Self-Confidence through Competency Boundaries

    Science.gov (United States)

    2015-01-01

    Representing Autonomous Systems’ Self-Confidence through Competency Boundaries Andrew R. Hutchins, M. L. Cummings Humans and Autonomy...characteristics of such interactions. This is particularly problematic when task demands approach, or exceed, the competency boundaries of assigned...Systems’ Self-Confidence through Competency Boundaries 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d. PROJECT

  16. The Knowledge Level

    Science.gov (United States)

    1981-07-01

    precisely to realizing mental functions in physical systems. In the hands of Daniel Dennett (1978), a philosopher who has concerned himself rather...illustrated repeatedly by Dennett with the gross flow diagrams of AI programs. The intentional stance corresponds to the knowledge level. In...particular, Dennett takes the important step of jettisoning the major result-cum- assumption of the original doctrine, to wit, that the intentional is

  17. The Effect of Feedback Style on Feedback Seeking Behaviors: an Examination of Perceived Competence

    OpenAIRE

    Stimpson, Emily Carol

    1999-01-01

    Research in the area of feedback seeking behaviors (Ashford & Cummings, 1983) has failed to examine the impact of a supervisorâ s feedback style on a subordinateâ s subsequent feedback seeking. This is an important area for investigation due to the positive relationship between feedback seeking and performance. Deci and Ryanâ s cognitive evaluation theory suggests that intrinsic motivation may be an important mediator between feedback style and FSB in that feedback ...

  18. Barriers to Robust and Effective Human-Agent Teamwork

    Science.gov (United States)

    2014-01-01

    Barriers to Robust and Effective Human-Agent Teamwork Fei Gao, M. L. Cummings Massachusetts Institute of Technology Cambridge, MA 02139, USA...done by an individual. Although teamwork may im- pose extra workload related to coordination and communi- cation, teams have the potential of offering...greater adapta- bility, productivity, and creativity than any one individual can offer (Gladstein, 1984). However, the benefits of teamwork do not

  19. Group for High Resolution Sea Surface Temperature (GHRSST) Analysis Fields Inter-Comparisons. Part 1: A GHRSST Multi-Product Ensemble (GMPE)

    Science.gov (United States)

    2012-05-02

    Martin a,n, Prasanjit Dash b,c, Alexander Ignatov b, Viva Banzon d, Helen Beggs e, Bruce Brasnett f, Jean-Francois Cayula g, James Cummings h, Craig...2011.09.003. Rayner, N.A., Parker, D.E., Horton, E.B., Folland, C.K., Alexander, L.V., Rowell, D.P., Kent, E.C., Kaplan , A., 2003. Global analyses of sea

  20. Brachyceran Diptera (Insecta) in Cretaceous ambers, Part IV, Significant New Orthorrhaphous Taxa.

    Science.gov (United States)

    Grimaldi, David A; Arillo, Antonio; Cumming, Jeffrey M; Hauser, Martin

    2011-01-01

    Thirteen species of basal Brachycera (11 described as new) are reported, belonging to nine families and three infraorders. They are preserved in amber from the Early Cretaceous (Neocomian) of Lebanon, Albian of northern Spain, upper Albian to lower Cenomanian of northern Myanmar, and Late Cretaceous of New Jersey USA (Turonian) and Alberta, Canada (Campanian). Taxa are as follows, with significance as noted: In Stratiomyomorpha: Stratiomyidae (Cretaceogaster pygmaeus Teskey [2 new specimens in Canadian amber], Lysistrata emerita Grimaldi & Arillo, gen. et sp. n. [stem-group species of the family in Spanish amber]), and Xylomyidae (Cretoxyla azari Grimaldi & Cumming, gen. et sp. n. [in Lebanese amber], and an undescribed species from Spain). In Tabanomorpha: Tabanidae (Cratotabanus newjerseyensis Grimaldi, sp. n., in New Jersey amber). In Muscomorpha: Acroceridae (Schlingeromyia minuta Grimaldi & Hauser, gen. et sp. n. and Burmacyrtus rusmithi Grimaldi & Hauser gen. etsp. n., in Burmese amber, the only definitive species of the family from the Cretaceous); Mythicomyiidae (Microburmyia analvena Grimaldi & Cumming gen. et sp. n. and Microburmyia veanalvena Grimaldi & Cumming, sp. n., stem-group species of the family, both in Burmese amber); Apsilocephalidae or near (therevoid family-group) (Kumaromyia burmitica Grimaldi & Hauser, gen. et sp. n. [in Burmese amber]); Apystomyiidae (Hilarimorphites burmanica Grimaldi & Cumming, sp. n. [in Burmese amber], whose closest relatives are from the Late Jurassic of Kazachstan, the Late Cretaceous of New Jersey, and Recent of California). Lastly, two species belonging to families incertae sedis, both in Burmese amber: Tethepomyiidae (Tethepomyia zigrasi Grimaldi & Arillo sp. n., the aculeate oviscapt of which indicates this family was probably parasitoidal and related to Eremochaetidae); and unplaced to family is Myanmyia asteiformia Grimaldi, gen. et sp. n., a minute fly with highly reduced venation. These new taxa significantly