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Sample records for buckingham potential

  1. A new variation of the Buckingham exponential-6 potential with a tunable, singularity-free short-range repulsion and an adjustable long-range attraction

    Energy Technology Data Exchange (ETDEWEB)

    Werhahn, Jasper C.; Miliordos, Evangelos; Xantheas, Sotiris S.

    2015-01-05

    We introduce new generalized (reverting to the original) and extended (not reverting to the original) 4-parameter forms of the (B-2) Potential Energy Function (PEF) of Wang etal. (L.-P. Wang, J. Chen and T. van Voorhis, J. Chem. Theor. Comp. 9, 452 (2013)), which is itself a modification of the Buckingham exponential-6 PEF. The new forms have a tunable, singularity-free short-range repulsion and an adjustable long-range attraction. They produce fits to high quality ab initio data for the X–(H2O), X=F, Cl, Br, I and M+(H2O), M=Li, Na, K, Rb, Cs dimers that are between 1 and 2 orders of magnitude better than the original 3-parameter (B-2) and modified Buckingham exponential-6 PEFs. They are also slightly better than the 4-parameter generalized Buckingham exponential-6(gBe-6) and of comparable quality with the 4-parameter extended Morse (eM) PEFs introduced recently by us.

  2. Buckingham (1907): An appreciation

    Energy Technology Data Exchange (ETDEWEB)

    Narasimhan, T.N.

    2004-11-17

    Nearly a century ago, Edgar Buckingham (1907) published a seminal work on the movement of soil moisture which is part of the foundation of modern soil physics. It also constitutes a pioneering contribution in the study of multi-phase flow in porous media. A physicist, Buckingham took on an earth science issue of importance to society, and produced superb basic science as a byproduct. Buckingham impresses us with his ability to combine experiment and theory, and his capacity to intuitively explain difficult ideas to a wide audience. Science progresses both by gradual accretion of knowledge, and by sudden influx of ideas. Buckingham's contribution belongs in the latter category. After a brief, four-year rendezvous with soil science, he went on to pursue a long and distinguished career in physics with the National Bureau of Standards. This paper is an appreciation of Buckingham's contribution on soil moisture in the context of contemporary developments in diffusion theory, and the rapid growth of science in America at the turn of the twentieth century.

  3. The soil physics contributions of Edgar Buckingham

    Science.gov (United States)

    Nimmo, J.R.; Landa, E.R.

    2005-01-01

    During 1902 to 1906 as a soil physicist at the USDA Bureau of Soils (BOS), Edgar Buckingham originated the concepts of matric potential, soil-water retention curves, specific water capacity, and unsaturated hydraulic conductivity (K) as a distinct property of a soil. He applied a formula equivalent to Darcy's law (though without specific mention of Darcy's work) to unsaturated flow. He also contributed significant research on quasi-empirical formulas for K as a function of water content, water flow in capillary crevices and in thin films, and scaling. Buckingham's work on gas flow in soils produced paradigms that are consistent with our current understanding. His work on evaporation elucidated the concept of self-mulching and produced sound and sometimes paradoxical generalizations concerning conditions that favor or retard evaporation. Largely overshadowing those achievements, however, is that he launched a theory, still accepted today, that could predict transient water content as a function of time and space. Recently discovered documents reveal some of the arguments Buckingham had with BOS officials, including the text of a two-paragraph conclusion of his famous 1907 report on soil water, and the official letter documenting rejection of that text. Strained interpersonal relations motivated the departure of Buckingham and other brilliant physicists (N.E. Dorsey, F.H. King, and Lyman Briggs) from the BOS during 1903 to 1906. Given that Buckingham and his BOS colleagues had been rapidly developing the means of quantifying unsaturated flow, these strained relations probably slowed the advancement of unsaturated flow theory. ?? Soil Science Society of America.

  4. Dimensional analysis in physics and the Buckingham theorem

    Energy Technology Data Exchange (ETDEWEB)

    Misic, Tatjana [Primary School ' Cegar' , 18 000 Nis (Serbia); Najdanovic-Lukic, Marina [Primary School ' Desanka Maksimovic' , 18 000 Nis (Serbia); Nesic, Ljubisa, E-mail: nesiclj@junis.ni.ac.r [Faculty of Sciences, 18 000 Nis (Serbia)

    2010-07-15

    Dimensional analysis is a simple, clear and intuitive method for determining the functional dependence of physical quantities that are of importance to a certain process. However, in physics textbooks, very little space is usually given to this approach and it is often presented only as a diagnostic tool used to determine the validity of dependences otherwise obtained. This paper presents the basics of dimensional analysis in two cases: the resistance force of the fluid that occurs when a body moves through it and the speed of propagation of waves on water. After that, a general approach to dimensional analysis based on the Buckingham theorem is shown. The material presented in the paper could be useful to both students of physics and physics graduates.

  5. Modelling the Cast Component Weight in Hot Chamber Die Casting using Combined Taguchi and Buckingham's π Approach

    Science.gov (United States)

    Singh, Rupinder

    2017-03-01

    Hot chamber (HC) die casting process is one of the most widely used commercial processes for the casting of low temperature metals and alloys. This process gives near-net shape product with high dimensional accuracy. However in actual field environment the best settings of input parameters is often conflicting as the shape and size of the casting changes and one have to trade off among various output parameters like hardness, dimensional accuracy, casting defects, microstructure etc. So for online inspection of the cast components properties (without affecting the production line) the weight measurement has been established as one of the cost effective method (as the difference in weight of sound and unsound casting reflects the possible casting defects) in field environment. In the present work at first stage the effect of three input process parameters (namely: pressure at 2nd phase in HC die casting; metal pouring temperature and die opening time) has been studied for optimizing the cast component weight `W' as output parameter in form of macro model based upon Taguchi L9 OA. After this Buckingham's π approach has been applied on Taguchi based macro model for the development of micro model. This study highlights the Taguchi-Buckingham based combined approach as a case study (for conversion of macro model into micro model) by identification of optimum levels of input parameters (based on Taguchi approach) and development of mathematical model (based on Buckingham's π approach). Finally developed mathematical model can be used for predicting W in HC die casting process with more flexibility. The results of study highlights second degree polynomial equation for predicting cast component weight in HC die casting and suggest that pressure at 2nd stage is one of the most contributing factors for controlling the casting defect/weight of casting.

  6. Modelling the Cast Component Weight in Hot Chamber Die Casting using Combined Taguchi and Buckingham's π Approach

    Science.gov (United States)

    Singh, Rupinder

    2018-02-01

    Hot chamber (HC) die casting process is one of the most widely used commercial processes for the casting of low temperature metals and alloys. This process gives near-net shape product with high dimensional accuracy. However in actual field environment the best settings of input parameters is often conflicting as the shape and size of the casting changes and one have to trade off among various output parameters like hardness, dimensional accuracy, casting defects, microstructure etc. So for online inspection of the cast components properties (without affecting the production line) the weight measurement has been established as one of the cost effective method (as the difference in weight of sound and unsound casting reflects the possible casting defects) in field environment. In the present work at first stage the effect of three input process parameters (namely: pressure at 2nd phase in HC die casting; metal pouring temperature and die opening time) has been studied for optimizing the cast component weight `W' as output parameter in form of macro model based upon Taguchi L9 OA. After this Buckingham's π approach has been applied on Taguchi based macro model for the development of micro model. This study highlights the Taguchi-Buckingham based combined approach as a case study (for conversion of macro model into micro model) by identification of optimum levels of input parameters (based on Taguchi approach) and development of mathematical model (based on Buckingham's π approach). Finally developed mathematical model can be used for predicting W in HC die casting process with more flexibility. The results of study highlights second degree polynomial equation for predicting cast component weight in HC die casting and suggest that pressure at 2nd stage is one of the most contributing factors for controlling the casting defect/weight of casting.

  7. Administração Militar, Gestão Estratégica e Liderança: uma aferição dos contributos de Buckingham, Drucker, Goldratt, Hill, Porter e Rosenzweig

    OpenAIRE

    Pinheiro, João

    2013-01-01

    O presente Trabalho de Investigação Aplicada encontra-se subordinado ao tema "Administração Militar, Gestão Estratégica e Liderança: uma aferição dos contributos de Buckingham, Drucker, Goldratt, Hill, Porter e Rosenzweig". Com esta investigação pretendeu-se estudar os contributos mais significativos relativos aos autores Buckingham, Drucker, Goldratt, Hill, Porter e Rosenzweig, no âmbito das temáticas da gestão estratégica e liderança, e procurar identificar área...

  8. Astrobiological Studies Plan at UCSD and the University of Buckingham

    Science.gov (United States)

    Gibson, Carl H.; Wickramasinghe, N. Chandra

    2011-10-01

    A UC-HBCU grant is requested to assist undergraduate and masters level HBCU Interns to achieve their professional and academic goals by attending summer school classes at UCSD along with graduate students in the UCSD Astrobiology Studies program, and by also attending a NASA sponsored scientific meeting in San Diego on Astrobiology organized by NASA scientist Richard Hoover (the 14th in a sequence). Hoover has recently published a paper in the Journal of Cosmology claiming extraterrestrial life fossils in three meteorites. Students will attend a workshop to prepare research publications on Astrobiological Science for the Journal of Cosmology or equivalent refereed journal, mentored by UCSD faculty and graduate students as co-authors and referees, all committed to the several months of communication usually required to complete a publishable paper. The program is intended to provide pathways to graduate admissions in the broad range of science and engineering fields, and by exposure to fundamental science and engineering disciplines needed by Astrobiologists. A three year UC-HBCU Astrobiological Studies program is proposed: 2011, 2012 and 2013. Interns would be eligible to enter this program when they become advanced graduate students. A center of excellence in astrobiology is planned for UCSD similar to that Directed by Professor Wickramasinghe for many years with Fred Hoyle at Cardiff University, http://www.astrobiology.cf.ac.uk /chandra1.html. Professor Wickramasinghe's CV is attached as Appendix 1. Figures A2-1,2 of Appendix 2 compare Astrobiology timelines of modern fluid mechanical and astrobiological models of Gibson/Wickramasinghe/Schild of the Journal of Cosmology with standard NASA- CDMHC models. NASA support will be sought to support research and educational aspects of both initiatives. Overload teaching of up to two courses a year by UCSD faculty of key astrobiology courses at either UCSD or at HBCU campuses is authorized by recent guidelines of UCSD Senior Vice Chancellor Subramani for Academic Affairs, following recommendations of Dean Seible of the UCSD Jacobs School of Engineering. Appendix 3 summarizes how this proposal will meet the goals of the UCOP initiatives.

  9. Electric potential invariants and ions-in-molecules effective potentials for molecular Rydberg states

    Science.gov (United States)

    Coy, Stephen L.; Grimes, David D.; Zhou, Yan; Field, Robert W.; Wong, Bryan M.

    2016-12-01

    The dependence of multipole moments and polarizabilities on external fields appears in many applications including biomolecular molecular mechanics, optical non-linearity, nanomaterial calculations, and the perturbation of spectroscopic signatures in atomic clocks. Over a wide range of distances, distributed multipole and polarizability potentials can be applied to obtain the variation of atom-centered atoms-in-molecules electric properties like bonding-quenched polarizability. For cylindrically symmetric charge distributions, we examine single-center and atom-centered effective polarization potentials in a non-relativistic approximation for Rydberg states. For ions, the multipole expansion is strongly origin-dependent, but we note that origin-independent invariants can be defined. The several families of invariants correspond to optimized representations differing by origin and number of terms. Among them, a representation at the center of dipole polarizability optimizes the accuracy of the potential with terms through 1/r4. We formulate the single-center expansion in terms of polarization-modified effective multipole moments, defining a form related to the source-multipole expansion of Brink and Satchler. Atom-centered potentials are an origin independent alternative but are limited both by the properties allowed at each center and by the neglected effects like bond polarizability and charge flow. To enable comparisons between single-center effective potentials in Cartesian or spherical form and two-center effective potentials with differing levels of mutual induction between atomic centers, we give analytical expressions for the bond-length and origin-dependence of multipole and polarizability terms projected in the multipole and polarizability expansion of Buckingham. The atom-centered potentials can then be used with experimental data and ab initio calculations to estimate atoms-in-molecules properties. Some results are given for BaF+ and HF showing the

  10. Intermolecular potential for binding of protonated peptide ions with perfluorinated hydrocarbon surfaces.

    Science.gov (United States)

    Pratihar, Subha; Kohale, Swapnil C; Vázquez, Saulo A; Hase, William L

    2014-05-22

    An analytic potential energy function was developed to model both short-range and long-range interactions between protonated peptide ions and perfluorinated hydrocarbon chains. The potential function is defined as a sum of two-body potentials of the Buckingham form. The parameters of the two-body potentials were obtained by fits to intermolecular potential energy curves (IPECs) calculated for CF4, which represents the F and C atoms of a perfluoroalkane chain, interacting with small molecules chosen as representatives of the main functional groups and atoms present in protonated peptide ions: specifically, CH4, NH3, NH4(+), and HCOOH. The IPECs were calculated at the MP2/aug-cc-pVTZ level of theory, with basis set superposition error (BSSE) corrections. Good fits were obtained for an energy range extending up to about 400 kcal/mol. It is shown that the pair potentials derived from the NH3/CF4 and HCOOH/CF4 fits reproduce acceptably well the intermolecular interactions in HCONH2/CF4, which indicates that the parameters obtained for the amine and carbonyl atoms may be transferable to the corresponding atoms of the amide group. The derived potential energy function may be used in chemical dynamics simulations of collisions of peptide-H(+) ions with perfluorinated hydrocarbon surfaces.

  11. The Effects of Hydrogen on the Potential-Energy Surface of Amorphous Silicon

    Science.gov (United States)

    Joly, Jean-Francois; Mousseau, Normand

    2012-02-01

    Hydrogenated amorphous silicon (a-Si:H) is an important semiconducting material used in many applications from solar cells to transistors. In 2010, Houssem et al. [1], using the open-ended saddle-point search method, ART nouveau, studied the characteristics of the potential energy landscape of a-Si as a function of relaxation. Here, we extend this study and follow the impact of hydrogen doping on the same a-Si models as a function of doping level. Hydrogen atoms are first attached to dangling bonds, then are positioned to relieve strained bonds of fivefold coordinated silicon atoms. Once these sites are saturated, further doping is achieved with a Monte-Carlo bond switching method that preserves coordination and reduces stress [2]. Bonded interactions are described with a modified Stillinger-Weber potential and non-bonded Si-H and H-H interactions with an adapted Slater-Buckingham potential. Large series of ART nouveau searches are initiated on each model, resulting in an extended catalogue of events that characterize the evolution of potential energy surface as a function of H-doping. [4pt] [1] Houssem et al., Phys Rev. Lett., 105, 045503 (2010)[0pt] [2] Mousseau et al., Phys Rev. B, 41, 3702 (1990)

  12. Study of Monte Carlo Simulation Method for Methane Phase Diagram Prediction using Two Different Potential Models

    KAUST Repository

    Kadoura, Ahmad

    2011-06-06

    Lennard‐Jones (L‐J) and Buckingham exponential‐6 (exp‐6) potential models were used to produce isotherms for methane at temperatures below and above critical one. Molecular simulation approach, particularly Monte Carlo simulations, were employed to create these isotherms working with both canonical and Gibbs ensembles. Experiments in canonical ensemble with each model were conducted to estimate pressures at a range of temperatures above methane critical temperature. Results were collected and compared to experimental data existing in literature; both models showed an elegant agreement with the experimental data. In parallel, experiments below critical temperature were run in Gibbs ensemble using L‐J model only. Upon comparing results with experimental ones, a good fit was obtained with small deviations. The work was further developed by adding some statistical studies in order to achieve better understanding and interpretation to the estimated quantities by the simulation. Methane phase diagrams were successfully reproduced by an efficient molecular simulation technique with different potential models. This relatively simple demonstration shows how powerful molecular simulation methods could be, hence further applications on more complicated systems are considered. Prediction of phase behavior of elemental sulfur in sour natural gases has been an interesting and challenging field in oil and gas industry. Determination of elemental sulfur solubility conditions helps avoiding all kinds of problems caused by its dissolution in gas production and transportation processes. For this purpose, further enhancement to the methods used is to be considered in order to successfully simulate elemental sulfur phase behavior in sour natural gases mixtures.

  13. PSO Method for Fitting Analytic Potential Energy Functions. Application to I-(H2O).

    Science.gov (United States)

    Bhandari, H N; Ma, X; Paul, A K; Smith, P; Hase, W L

    2018-02-08

    In this work a particle swarm optimization (PSO) algorithm was used to fit an analytic potential energy function to I - (H 2 O) intermolecular potential energy curves calculated with DFT/B97-1 theory. The analytic function is a sum of two-body terms, each written as a generalized sum of Buckingham and Lennard-Jones terms with only six parameters. Two models were used to describe the two-body terms between I - and H 2 O: a three-site model H 2 O and a four-site model including a ghost atom. The fits are compared with those obtained with a genetic/nonlinear least-squares algorithm. The ghost atom model significantly improves the fitting accuracy for both algorithms. The PSO fits are significantly more accurate and much less time-consuming than those obtained with the genetic/nonlinear least-squares algorithm. Eight I - ---H 2 O potential energy curves, fit with the PSO algorithm for the three- and four-site models, have RMSE of 1.37 and 0.22 kcal/mol and compute times of ∼20 and ∼68 min, respectively. The PSO fit for the four-site model is quite adequate for determining densities of states and partition functions for I - (H 2 O) n clusters at high energies and temperatures, respectively. The PSO algorithm was also applied to the eight potential energy curves, with the four-site model, for a short time ∼8 min fitting. The RMSE was small, only 0.37 kcal/mol, showing the high efficiency of the PSO algorithm with retention of a good fitting accuracy. The PSO algorithm is a good choice for fitting analytic potential energy functions, and for the work presented here was able to find an adequate fit to an I - (H 2 O) analytic intermolecular potential with a small number of parameters.

  14. Violent Potentials

    DEFF Research Database (Denmark)

    Mikkelsen, Henrik Hvenegaard; Søgaard, Thomas Friis

    2015-01-01

    This article explores the social significance of violence as potentiality and performance among former headhunters. Taking its outset in an ethnographic study of violence and masculinity among the Philippine people known as the Bugkalot, we explore how violence as “performed violent potentiality...... today abandoned headhunting, the potentials for violence and dominance, which the act of headhunting sought to elicit, remains a critical aspect of masculinity. We propose that a focus on the social significance of performative violent potentiality among Bugkalot men can provide general insights...... that can also be used in other contexts to understand how men construct hegemonic masculinity by strategically adopting the interspace of civility and violence....

  15. Potential Theory

    CERN Document Server

    Lukeš, Jaroslav; Netuka, Ivan; Veselý, Jiří

    1988-01-01

    Within the tradition of meetings devoted to potential theory, a conference on potential theory took place in Prague on 19-24, July 1987. The Conference was organized by the Faculty of Mathematics and Physics, Charles University, with the collaboration of the Institute of Mathematics, Czechoslovak Academy of Sciences, the Department of Mathematics, Czech University of Technology, the Union of Czechoslovak Mathematicians and Physicists, the Czechoslovak Scientific and Technical Society, and supported by IMU. During the Conference, 69 scientific communications from different branches of potential theory were presented; the majority of them are in­ cluded in the present volume. (Papers based on survey lectures delivered at the Conference, its program as well as a collection of problems from potential theory will appear in a special volume of the Lecture Notes Series published by Springer-Verlag). Topics of these communications truly reflect the vast scope of contemporary potential theory. Some contributions deal...

  16. Violent potentials

    DEFF Research Database (Denmark)

    Mikkelsen, Henrik Hvenegaard; Friis Søgaard, Thomas

    2016-01-01

    This article explores the social significance of violence as potentiality and performance among former headhunters engaged in ritual killings. Taking its outset in an ethnographic study of violence and masculinity among the Philippine people known as the Bugkalot, we explore how violence....... While most Bugkalot men have today abandoned headhunting, the potentials for violence and dominance, which the act of headhunting sought to elicit, remains a critical aspect of masculinity. We propose that a focus on the social significance of performative violent potentiality among Bugkalot men can...... provide general insights that can also be used in other contexts to understand how men construct hegemonic masculinity by strategically adopting the interspace of civility and violence....

  17. Potential theory

    CERN Document Server

    Helms, Lester L

    2014-01-01

    Potential Theory presents a clear path from calculus to classical potential theory and beyond, with the aim of moving the reader into the area of mathematical research as quickly as possible. The subject matter is developed from first principles using only calculus. Commencing with the inverse square law for gravitational and electromagnetic forces and the divergence theorem, the author develops methods for constructing solutions of Laplace's equation on a region with prescribed values on the boundary of the region. The latter half of the book addresses more advanced material aimed at those with the background of a senior undergraduate or beginning graduate course in real analysis. Starting with solutions of the Dirichlet problem subject to mixed boundary conditions on the simplest of regions, methods of morphing such solutions onto solutions of Poisson's equation on more general regions are developed using diffeomorphisms and the Perron-Wiener-Brelot method, culminating in application to Brownian motion. In ...

  18. Isomorphs in the phase diagram of a model liquid without inverse power law repulsion

    DEFF Research Database (Denmark)

    Veldhorst, Arnold Adriaan; Bøhling, Lasse; Dyre, J. C.

    2012-01-01

    the dynamics of the viscous Buckingham liquid is mimicked by a corresponding model with purely repulsive inverse-power-law interactions. The results presented here closely resemble earlier results for Lennard-Jones type liquids, demonstrating that the existence of strong correlations and isomorphs does......It is demonstrated by molecular dynamics simulations that liquids interacting via the Buckingham potential are strongly correlating, i.e., have regions of their phase diagram where constant-volume equilibrium fluctuations in the virial and potential energy are strongly correlated. A binary...... Buckingham liquid is cooled to a viscous phase and shown to have isomorphs, which are curves in the phase diagram along which structure and dynamics in appropriate units are invariant to a good approximation. To test this, the radial distribution function, and both the incoherent and coherent intermediate...

  19. Calculation of collision integrals and computation of diffusion coefficients in metal vapor mixtures

    Science.gov (United States)

    Aref'ev, K. M.; Guseva, M. A.; Novikov, A. A.

    1992-06-01

    Results of numerical calculations of diffusion coefficients are presented for binary mixtures of metal vapors with gases and different metal vapors. The calculations have been performed by using a program for computing collision integrals for potential functions defined in arbitrary form. A table of integrals for the Buckingham-Corner potential is presented.

  20. Crown Fire Potential

    Data.gov (United States)

    Earth Data Analysis Center, University of New Mexico — Crown fire potential was modeled using FlamMap, an interagency fire behavior mapping and analysis program that computes potential fire behavior characteristics. The...

  1. Soils - Potential Runoff

    Data.gov (United States)

    Kansas Data Access and Support Center — This digital spatial data set provides information on the spatial distribution of potential runoff-contributing areas in Kansas. Potential runoff-contributing areas...

  2. Retail Spending Potential

    Data.gov (United States)

    City and County of Durham, North Carolina — This map shows the average household spending potential for retail goods in the United States in 2012. Spending potential data measures household consumer spending...

  3. Quantum potential theory

    CERN Document Server

    Schürmann, Michael

    2008-01-01

    This volume contains the revised and completed notes of lectures given at the school "Quantum Potential Theory: Structure and Applications to Physics," held at the Alfried-Krupp-Wissenschaftskolleg in Greifswald from February 26 to March 10, 2007. Quantum potential theory studies noncommutative (or quantum) analogs of classical potential theory. These lectures provide an introduction to this theory, concentrating on probabilistic potential theory and it quantum analogs, i.e. quantum Markov processes and semigroups, quantum random walks, Dirichlet forms on C* and von Neumann algebras, and boundary theory. Applications to quantum physics, in particular the filtering problem in quantum optics, are also presented.

  4. Black Hole Dynamic Potentials

    Indian Academy of Sciences (India)

    2016-01-27

    Jan 27, 2016 ... In the following paper, certain black hole dynamic potentials have been developed definitively on the lines of classical thermodynamics. These potentials have been refined in view of the small differences in the equations of the laws of black hole dynamics as given by Bekenstein and those of ...

  5. Potential energy savings

    DEFF Research Database (Denmark)

    Schultz, Jørgen Munthe

    1996-01-01

    This chapter describes the chosen methods for estimating the potential energy savings if ordinary window glazing is exchanged with aerogel glazing as well as commercial low-energy glazings.......This chapter describes the chosen methods for estimating the potential energy savings if ordinary window glazing is exchanged with aerogel glazing as well as commercial low-energy glazings....

  6. China's Military Potential

    National Research Council Canada - National Science Library

    Wortzel, Larry

    1998-01-01

    The People's Republic of China (PRC) is seen by many as an economic powerhouse with the world's largest standing military that has the potential to translate economic power into the military sphere...

  7. Elderberry: Botany, Horticulture, Potential

    Science.gov (United States)

    Horticultural Review allows extensive reviews of the state of the knowledge on certain topics or crops. Elderberry: Botany, Horticulture, Potential, is outlined with an Introduction, Botany, Horticulture, Propagation, Uses and Conclusion sections. This review compiles literature from around the w...

  8. Static potential in baryon

    OpenAIRE

    Kuzmenko, D. S.

    2003-01-01

    The baryon static potential is calculated in the framework of field correlator method and is shown to match the recent lattice results. The effects of the nonzero value of the gluon correlation length are emphasized.

  9. Relativistic gauge invariant potentials

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, J.J. (Valladolid Univ. (Spain). Dept. de Fisica Teorica); Negro, J. (Valladolid Univ. (Spain). Dept. de Fisica Teorica); Olmo, M.A. del (Valladolid Univ. (Spain). Dept. de Fisica Teorica)

    1995-01-01

    A global method characterizing the invariant connections on an abelian principal bundle under a group of transformations is applied in order to get gauge invariant electromagnetic (elm.) potentials in a systematic way. So, we have classified all the elm. gauge invariant potentials under the Poincare subgroups of dimensions 4, 5, and 6, up to conjugation. It is paid attention in particular to the situation where these subgroups do not act transitively on the space-time manifold. We have used the same procedure for some galilean subgroups to get nonrelativistic potentials and study the way they are related to their relativistic partners by means of contractions. Some conformal gauge invariant potentials have also been derived and considered when they are seen as consequence of an enlargement of the Poincare symmetries. (orig.)

  10. Sicilian potential biogas production

    OpenAIRE

    Antonio Comparetti; Pierluigi Febo; Carlo Greco; Santo Orlando; Kestutis Navickas; Kestutis Venslauskas

    2013-01-01

    This study is aimed at predicting the Sicilian potential biogas production, using the Organic Fraction of Municipal Solid Waste (OFMSW), animal manure and food industry by-products, in a region where only one biogas plant using MSW and one co-digestion plant are nowadays available. The statistical data about OFMSW, the number of animals bred in medium and large farms and the amounts of by-products of food processing industries were evaluated, in order to compute the Sicilian potential biogas ...

  11. Potential GDP in Romania

    Directory of Open Access Journals (Sweden)

    Duguleana C.

    2014-12-01

    Full Text Available Economic and financial crisis has hit Romania since the second half of 2008, causing a significant drop in production and household income. The consequences of this crisis include rising unemployment and falling household consumption expenditure. Thus, in June 2008, the unemployment rate was 3.7% and in March 2010 it reached 8.4% level. Final consumption expenditure of households fell by 9.2% in 2009 and by 3.3% in 2010. The slowly begun recovery in 2011 revealed that unemployment in the Romanian economy has a significant structural component. As a result, the potential GDP remains low. The paper presents a method for estimating the potential GDP to determine the gap between real GDP affected by cyclical factors and the productive potential of the economy, used in any circumstances.

  12. Abuse Potential of Pregabalin

    DEFF Research Database (Denmark)

    Schjerning, Ole; Rosenzweig, Mary; Pottegård, Anton

    2016-01-01

    BACKGROUND: Several case reports and epidemiological studies have raised concern about the abuse potential of pregabalin, the use of which has increased substantially over the last decade. Pregabalin is, in some cases, used for recreational purposes and it has incurred attention among drug abusers...... for causing euphoric and dissociative effects when taken in doses exceeding normal therapeutic dosages or used by alternative routes of administration, such as nasal insufflation or venous injection. The magnitude of the abuse potential and the mechanism behind it are not fully known. OBJECTIVE: The aim......), clinical (n = 19) and epidemiological (n = 13) studies addressing the abuse potential of pregabalin. We also reviewed case reports (n = 9) concerning abuse of pregabalin. The preclinical studies indicated that pregabalin possesses modulatory effects on the GABA and glutamate systems, leaving room...

  13. Graphing Electric Potential.

    Science.gov (United States)

    De Jong, Marvin L.

    1993-01-01

    Describes the powerful graphing ability of computer algebra systems (CAS) to create three-dimensional graphs or surface graphics of electric potentials. Provides equations along with examples of the printouts. Lists the programs Mathematica, Maple, Derive, Theorist, MathCad, and MATLAB as promising CAS systems. (MVL)

  14. Solar energy potential

    Science.gov (United States)

    1973-01-01

    The potential of solar energy as a national resource is discussed. Research and development programs for the development of eleven concepts are described to show the proposed funding for each year over a fifteen year period. The estimated energy contributions by period for each of the solar concepts are analyzed. The estimated impact of the solar concepts to the year 2020 are tabulated.

  15. Potential support ratios

    DEFF Research Database (Denmark)

    Kjærgaard, Søren; Canudas-Romo, Vladimir

    2017-01-01

    The ‘prospective potential support ratio’ has been proposed by researchers as a measure that accurately quantifies the burden of ageing, by identifying the fraction of a population that has passed a certain measure of longevity, for example, 17 years of life expectancy. Nevertheless, the prospect......The ‘prospective potential support ratio’ has been proposed by researchers as a measure that accurately quantifies the burden of ageing, by identifying the fraction of a population that has passed a certain measure of longevity, for example, 17 years of life expectancy. Nevertheless......, the prospective potential support ratio usually focuses on the current mortality schedule, or period life expectancy. Instead, in this paper we look at the actual mortality experienced by cohorts in a population, using cohort life tables. We analyse differences between the two perspectives using mortality models......, historical data, and forecasted data. Cohort life expectancy takes future mortality improvements into account, unlike period life expectancy, leading to a higher prospective potential support ratio. Our results indicate that using cohort instead of period life expectancy returns around 0.5 extra younger...

  16. A potential pitfall

    African Journals Online (AJOL)

    of paraganglioma. Such procedures can cause a surged release of catecholamines into the systemic circulation, which can lead to features of a catecholamine crisis − headache, sweating, elevated blood pressure,. CT-guided biopsy of suspected malignancy: A potential pitfall. S Henderson,1 MB ChB; W Elsaify,2 MB ChB, ...

  17. Sicilian potential biogas production

    Directory of Open Access Journals (Sweden)

    Antonio Comparetti

    2013-09-01

    Full Text Available This study is aimed at predicting the Sicilian potential biogas production, using the Organic Fraction of Municipal Solid Waste (OFMSW, animal manure and food industry by-products, in a region where only one biogas plant using MSW and one co-digestion plant are nowadays available. The statistical data about OFMSW, the number of animals bred in medium and large farms and the amounts of by-products of food processing industries were evaluated, in order to compute the Sicilian potential biogas and energy production. The OFMSW produced in Sicily, that is 0.8 million tons ca. per year (37% of MSW, could be used in a bio-reactor, together with other raw materials, for Anaerobic Digestion (AD process, producing biogas and “digestate”. Moreover, 3.03 million tons ca. of manure, collected in medium and large animal husbandry farms (where cows, pigs and poultry are bred, and 350 thousand tons ca. of by-products, collected in food processing industries (pomace from olive oil mills and grape marc from wineries, might be used for AD process. The Sicilian potential biogas production from the AD of the above raw materials is 170.2 millions of m3, that is equal to 1023.4 GWh of energy per year, of which 484 GWh from animal manure, 303 GWh from OFMSW and 236.4 GWh from food industry by-products. The highest biogas production is in the province of Palermo (35.6 millions of m3, Ragusa (30.8 millions of m3 and Catania (22.8 millions of m3, having a potential energy production of 213.8, 185 and 137 GWh, respectively.

  18. Unearthing new energy potential

    Energy Technology Data Exchange (ETDEWEB)

    Forrest, M.

    2011-04-15

    An interview with Stan Szary, CEO, Saturn Minerals, about this company's mining developments in Saskatchewan, western Canada, and their growing importance as a provider of energy now and in the future. Company activity in the past decade has revealed the two potential for coals within the Cretaceous Mannville Group and has identified the style of deposition that had complicated the region's coal geology. 2 photos.

  19. Potential energy function (PEF)

    Science.gov (United States)

    Guelachvili, G.

    This document is part of Subvolume B `Linear Triatomic Molecules', Part 9, of Volume 20 `Molecular Constants mostly from Infrared Spectroscopy' of Landolt-Börnstein Group II `Molecules and Radicals'. Part of the introduction, it discusses the potential energy function (PEF) of linear molecules, including the PEF expanded as Taylor series, the transformation of the PEF to curvilinear valence coordinates, Morse functions and dimensionless normal coordinates, as well as specific forms of the PEF.

  20. POTENTIAL OF BUSINESS

    OpenAIRE

    Julija Avakumovic, Jelena Avakumovic

    2014-01-01

    Potential of businesses is available and relevant developed business opportunities which under certain conditions can affect the results of the business. Those are certain conditions possible exposure of the company. The success of a business depends of the knowledge of these resources and the way how to find the optimum combination of scale, structure and dynamics of available resources by the management of the business.

  1. Nonadiabatic Ponderomotive Potentials

    Energy Technology Data Exchange (ETDEWEB)

    Dodin IY, Fisch NJ

    2005-10-03

    An approximate integral of the Manley-Rowe type is found for a particle moving in a high-frequency field, which may interact resonantly with natural particle oscillations. An effective ponderomotive potential is introduced accordingly and can capture nonadiabatic particle dynamics. We show that nonadiabatic ponderomotive barriers can trap classical particles, produce cooling effect, and generate one-way walls for resonant species. Possible atomic applications are also envisioned.

  2. Potentials Unbounded Below

    CERN Document Server

    Curtright, Thomas

    2011-01-01

    Continuous interpolates are described for classical dynamical systems defined by discrete time-steps. Functional conjugation methods play a central role in obtaining the interpolations. The interpolates corrrespond to particle motion in an underlying potential, V. Typically, V has no lower bound and can exhibit switchbacks wherein V changes form when turning points are encountered by the particle. The logistic map is used to illustrate these features.

  3. Untapped potential - choose wisely

    Directory of Open Access Journals (Sweden)

    Catharine Anna Henderson

    2015-01-01

    Full Text Available Based on a personal perspective the author derived from a lecture at the American Public Health Association meeting about the power of a choice which can change the course of history, the author presehts a perspective on the choices made regarding ante-natal life and how this effects a loss in human potential and the global health repercussions that can result.

  4. Microfluidics realizes potential

    OpenAIRE

    Gould, Paula

    2004-01-01

    Advanced fabrication technologies are being used to make microscale tools for fluid manipulation. Interest in the development of microfluidic devices has been encouraged by the number of fluid-based processes that could benefit from miniaturization. A number of companies are now marketing fluidic ‘lab-on-a-chip’ systems for applications in biomedical research, environmental testing, and medical diagnostics. However, the full commercial potential of this technology has yet to be realized.

  5. Compact Polarimetry Potentials

    Science.gov (United States)

    Truong-Loi, My-Linh; Dubois-Fernandez, Pascale; Pottier, Eric

    2011-01-01

    The goal of this study is to show the potential of a compact-pol SAR system for vegetation applications. Compact-pol concept has been suggested to minimize the system design while maximize the information and is declined as the ?/4, ?/2 and hybrid modes. In this paper, the applications such as biomass and vegetation height estimates are first presented, then, the equivalence between compact-pol data simulated from full-pol data and compact-pol data processed from raw data as such is shown. Finally, a calibration procedure using external targets is proposed.

  6. Thermodynamics extends economics potentials

    Energy Technology Data Exchange (ETDEWEB)

    Bandura, Alexander V. [Kiev Technical Univ., Dept. of Marketing and Management, Kiev (Ukraine); Brodiansky, Victor M. [Moscow Energy Inst., Dept. of Cryogen Machines, Moscow (Russian Federation)

    2001-08-01

    In this paper we consider the use of exergy in economic valuation and its correlation with money. Exergy-based determination of production expenses provides a new base for 'natural' price determination. A new macroeconomic dynamics approach based on this correlation is proposed. This method is relatively general because it is not restricted by certain assumptions used in traditional economic analysis. The exergy model of macroeconomic dynamics was tested by utilizing data from the US economy. This test, covering a period of about 25 years, confirms this approach and opens new potentials in economic analysis. (Author)

  7. A crafting of potentials

    DEFF Research Database (Denmark)

    Kilbourn, Kyle

    In the movement from understanding the past towards creating the future design anthropology, as a discipline, will turn from one with archival qualities to one endowed with potentials for change. One challenge facing design anthropology is how to show relevance for theory generation while also in......-as is complemented by designing for as design anthropologists stage design workshops, span knowledge traditions, and make design moves. Reflecting on my own research process, I trace a few research tools that underline the craft of design anthropology....

  8. The Static Baryon Potential

    CERN Document Server

    Alexandrou, C; Tsapalis, A; Forcrand, Ph. de

    2002-01-01

    Using state of the art lattice techniques we investigate the static baryon potential. We employ the multi-hit procedure for the time links and a variational approach to determine the ground state with sufficient accuracy that, for distances up to $\\sim 1.2$ fm, we can distinguish the $Y$- and $\\Delta$- Ans\\"atze for the baryonic Wilson area law. Our analysis shows that the $\\Delta$-Ansatz is favoured. This result is also supported by the gauge-invariant nucleon wave function which we measure for the first time.

  9. Potential for growth

    Energy Technology Data Exchange (ETDEWEB)

    Amaya, N. [Carbocol (Colombia)

    2000-05-01

    Colombia's position in the international coal market is discussed, with reference to Carbocol, currently moving through a process of privatisation. Colombia is the fourth largest steam coal exporter worldwide. It has a huge expansion potential and may double its exports in the next decade. The market bottomed out in September 1999 and a new price cycle has already started. A sale mechanism has been developed to sell Carbocol's 50% stake in El Cerrejon Zona Norte Complex during 2000. The article is based on a paper presented at Coaltrans '99 in Hamburg, 18-20 October 1999. 2 photos.

  10. Zoonotic potential of Giardia.

    Science.gov (United States)

    Ryan, Una; Cacciò, Simone M

    2013-11-01

    Giardia duodenalis (syn. Giardia lamblia and Giardia intestinalis) is a common intestinal parasite of humans and mammals worldwide. Assessing the zoonotic transmission of the infection requires molecular characterization as there is considerable genetic variation within G. duodenalis. To date eight major genetic groups (assemblages) have been identified, two of which (A and B) are found in both humans and animals, whereas the remaining six (C to H) are host-specific and do not infect humans. Sequence-based surveys of single loci have identified a number of genetic variants (genotypes) within assemblages A and B in animal species, some of which may have zoonotic potential. Multi-locus typing data, however, has shown that in most cases, animals do not share identical multi-locus types with humans. Furthermore, interpretation of genotyping data is complicated by the presence of multiple alleles that generate "double peaks" in sequencing files from PCR products, and by the potential exchange of genetic material among isolates, which may account for the non-concordance in the assignment of isolates to specific assemblages. Therefore, a better understanding of the genetics of this parasite is required to allow the design of more sensitive and variable subtyping tools, that in turn may help unravel the complex epidemiology of this infection. Copyright © 2013. Published by Elsevier Ltd.

  11. Biomethanation and its potential.

    Science.gov (United States)

    Angelidaki, Irini; Karakashev, Dimitar; Batstone, Damien J; Plugge, Caroline M; Stams, Alfons J M

    2011-01-01

    Biomethanation is a process by which organic material is microbiologically converted under anaerobic conditions to biogas. Three main physiological groups of microorganisms are involved: fermenting bacteria, organic acid oxidizing bacteria, and methanogenic archaea. Microorganisms degrade organic matter via cascades of biochemical conversions to methane and carbon dioxide. Syntrophic relationships between hydrogen producers (acetogens) and hydrogen scavengers (homoacetogens, hydrogenotrophic methanogens, etc.) are critical to the process. Determination of practical and theoretical methane potential is very important for design for optimal process design, configuration, and effective evaluation of economic feasibility. A wide variety of process applications for biomethanation of wastewaters, slurries, and solid waste have been developed. They utilize different reactor types (fully mixed, plug-flow, biofilm, UASB, etc.) and process conditions (retention times, loading rates, temperatures, etc.) in order to maximize the energy output from the waste and also to decrease retention time and enhance process stability. Biomethanation has strong potential for the production of energy from organic residues and wastes. It will help to reduce the use of fossil fuels and thus reduce CO(2) emission. Copyright © 2011 Elsevier Inc. All rights reserved.

  12. Evaluation of hydrocarbon potential

    Energy Technology Data Exchange (ETDEWEB)

    Cashman, P.H.; Trexler, J.H. Jr. [Univ. of Nevada, Reno, NV (United States)

    1992-09-30

    Task 8 is responsible for assessing the hydrocarbon potential of the Yucca Mountain vincinity. Our main focus is source rock stratigraphy in the NTS area in southern Nevada. (In addition, Trexler continues to work on a parallel study of source rock stratigraphy in the oil-producing region of east central Nevada, but this work is not funded by Task 8.) As a supplement to the stratigraphic studies, we are studying the geometry and kinematics of deformation at NTS, particularly as these pertain to reconstructing Paleozoic stratigraphy and to predicting the nature of the Late Paleozoic rocks under Yucca Mountain. Our stratigraphic studies continue to support the interpretation that rocks mapped as the {open_quotes}Eleana Formation{close_quotes} are in fact parts of two different Mississippian units. We have made significant progress in determining the basin histories of both units. These place important constraints on regional paleogeographic and tectonic reconstructions. In addition to continued work on the Eleana, we plan to look at the overlying Tippipah Limestone. Preliminary TOC and maturation data indicate that this may be another potential source rock.

  13. Characterization of bioelectric potentials

    Science.gov (United States)

    Jorgensen, Charles C. (Inventor); Wheeler, Kevin R. (Inventor)

    2004-01-01

    Method and system for recognizing and characterizing bioelectric potential or electromyographic (EMG) signals associated with at least one of a coarse gesture and a fine gesture that is performed by a person, and use of the bioelectric potentials to enter data and/or commands into an electrical and/or mechanical instrument. As a gesture is performed, bioelectric signals that accompany the gesture are subjected to statistical averaging, within selected time intervals. Hidden Markov model analysis is applied to identify hidden, gesture-related states that are present. A metric is used to compare signals produced by a volitional gesture (not yet identified) with corresponding signals associated with each of a set of reference gestures, and the reference gesture that is closest to the volitional gesture is identified. Signals representing the volitional gesture are analyzed and compared with a database of reference gestures to determine if the volitional gesture is likely to be one of the reference gestures. Electronic and/or mechanical commands needed to carry out the gesture may be implemented at an interface to control an instrument. Applications include control of an aircraft, entry of data from a keyboard or other data entry device, and entry of data and commands in extreme environments that interfere with accurate entry.

  14. International Evoked Potentials Symposium

    CERN Document Server

    1980-01-01

    The past decade has seen great progress in the measurement of evoked potentials in man; a steady increase in our understanding of their charac­ teristics, their origins and their usefulness; and a growing application in the field of clinical diagnosis. The topic is a truly multidisciplinary one. Important research contributions have been made by workers of many different backgrounds and clinical applications span the specialities. This book represents a revised and updated version of the work originally presented at the international evoked potential symposium held in Nottingham 4-6 1978. The Nottingham Symposium provided a forum for a state-of-the-art discussion amongst workers from many different disciplines and from many different countries. For each major topic in the field an expert review set the scene for discussion of current research presentations. This format is retained in the book: the chapters in Part A provide the context in which the research presented in Part B is set. The task of selecting m...

  15. Vestibular evoked myogenic potential

    Directory of Open Access Journals (Sweden)

    Felipe, Lilian

    2012-01-01

    Full Text Available Introduction: The Vestibular Evoked Myogenic Potential (VEMP is a promising test for the evaluation of the cholic descending vestibular system. This reflex depends of the integrity from the saccular macula, from the inferior vestibular nerve, the vestibular nuclei, the vestibule-spinal tract and effectors muscles. Objective: Perform a systematic review of the pertinent literature by means of database (COCHRANE, MEDLINE, LILACS, CAPES. Conclusion: The clinical application of the VEMP has expanded in the last years, as goal that this exam is used as complementary in the otoneurological evaluation currently used. But, methodological issues must be clarified. This way, this method when combined with the standard protocol, can provide a more widely evaluation from the vestibular system. The standardization of the methodology is fundamental criterion for the replicability and sensibility of the exam.

  16. Biomethanation and Its Potential

    DEFF Research Database (Denmark)

    Angelidaki, Irini; Karakashev, Dimitar Borisov; Batstone, Damien J.

    2011-01-01

    Biomethanation is a process by which organic material is microbiologically converted under anaerobic conditions to biogas. Three main physiological groups of microorganisms are involved: fermenting bacteria, organic acid oxidizing bacteria, and methanogenic archaea. Microorganisms degrade organic...... matter via cascades of biochemical conversions to methane and carbon dioxide. Syntrophic relationships between hydrogen producers (acetogens) and hydrogen scavengers (homoacetogens, hydrogenotrophic methanogens, etc.) are critical to the process. Determination of practical and theoretical methane......, plugflow, biofilm, UASB, etc.) and process conditions (retention times, loading rates, temperatures, etc.) in order to maximize the energy output from the waste and also to decrease retention time and enhance process stability. Biomethanation has strong potential for the production of energy from organic...

  17. CLIC Physics Potential

    CERN Document Server

    Pandurovic, Mila

    2017-01-01

    The CLICdp is an international collaboration that investigates the physics potential of the Compact Linear Collider (CLIC) and performs research and development of the CLIC detector. CLIC is a future multi-TeV linear electron-positron collider, designed to cover a physics program of the Standard model physics, with the emphasis on Higgs and top as well as to address the wide range of open questions of the phenomena beyond the Standard model with high precision. The CLIC is designed to be build and operated at three discrete energy stages, sort(s) = 380 GeV, 1.5 and 3.0 TeV, which are optimized for the foreseen physics program. In this talk the CLIC accelerator, detector and experimental environment of CLIC will be presented, as well as, the number of the full-simulation measurements in the Higgs, top and beyond Standard model sector, presenting the capabilities of CLIC for high precision measurements.

  18. Potential dangers of cannabis.

    Science.gov (United States)

    Kaymakçalan, S

    1975-01-01

    Cannabis is not a harmless drug. The potential dangers of cannabis are briefly reviewed in this report. The above-mentioned observations on cannabis users should be kept in mind and carefully examined by all physicians. One could expect that as more potent cannabis preparations become available, some of the toxic manifestations which now seem rare might become more frequent. Some of the remarks about the dangers of cannabis may not be proved in future studies, and they may represent only our anxiety. However, prior to the elimination of these fears, no steps should be taken toward the legalizing of marijuana. At present there is no scientific evidence that cannabis is less harmful than either tobacco or alcohol. The opposite may be true. The analogy can be drawn between opium and cannabis. The permissive attitude toward the use of opium can easily lead to the use of morphine and other opiates. If we legalize the use of marijuana, we cannot prevent the use of more dangerous derivatives of cannabis; namely, hashish, cannabis oil and THC, itself. In my opinion, in the light of our present knowledge, legalizing of marijuana could be hazardous both for the individual and for society.

  19. Ethanol fermentation and potential.

    Science.gov (United States)

    Miller, D L

    1975-01-01

    Ethyl alcohol is one of the United States and world's major chemicals. Beverage alcohol in the United States must be prepared from cereal grains or other natural products. The U.S. industrial alcohol market has remained relatively stable for several years at approximately 300 million gallons annually. Most of this has been produced synthetically from petroleum raw material (gas and oil). These raw materials are experiencing major price increases and are in short supply. The production of ethyl alcohol from cereal grains and cellulosic raw materials by fermentation is technically feasible and has been proven. Alcohol produced from all such materials is equal to synthetic alcohol in quality and performance. Competitive economics have controlled the basic raw materials used. The major potential new ethyl alcohol market is as a component of automobile fuels. A 10% alcohol-gasoline blend in the United States would annually require over 10 billion gallons of anhydrous alcohol. Use of alcohol for this purpose is technically feasible. However, alcohol has not been economically competitive to date.

  20. RANGELAND SEQUESTRATION POTENTIAL ASSESSMENT

    Energy Technology Data Exchange (ETDEWEB)

    Lee Spangler; George F. Vance; Gerald E. Schuman; Justin D. Derner

    2012-03-31

    Rangelands occupy approximately half of the world's land area and store greater than 10% of the terrestrial biomass carbon and up to 30% of the global soil organic carbon. Although soil carbon sequestration rates are generally low on rangelands in comparison to croplands, increases in terrestrial carbon in rangelands resulting from management can account for significant carbon sequestration given the magnitude of this land resource. Despite the significance rangelands can play in carbon sequestration, our understanding remains limited. Researchers conducted a literature review to identify sustainably management practices that conserve existing rangeland carbon pools, as well as increase or restore carbon sequestration potentials for this type of ecosystem. The research team also reviewed the impact of grazing management on rangeland carbon dynamics, which are not well understood due to heterogeneity in grassland types. The literature review on the impact of grazing showed a wide variation of results, ranging from positive to negative to no response. On further review, the intensity of grazing appears to be a major factor in controlling rangeland soil organic carbon dynamics. In 2003, researchers conducted field sampling to assess the effect of several drought years during the period 1993-2002. Results suggested that drought can significantly impact rangeland soil organic carbon (SOC) levels, and therefore, carbon sequestration. Resampling was conducted in 2006; results again suggested that climatic conditions may have overridden management effects on SOC due to the ecological lag of the severe drought of 2002. Analysis of grazing practices during this research effort suggested that there are beneficial effects of light grazing compared to heavy grazing and non-grazing with respect to increased SOC and nitrogen contents. In general, carbon storage in rangelands also increases with increased precipitation, although researchers identified threshold levels of

  1. Quantum potentiality revisited.

    Science.gov (United States)

    Jaeger, Gregg

    2017-11-13

    Heisenberg offered an interpretation of the quantum state which made use of a quantitative version of an earlier notion, [Formula: see text], of Aristotle by both referring to it using its Latin name, potentia, and identifying its qualitative aspect with [Formula: see text] The relationship between this use and Aristotle's notion was not made by Heisenberg in full detail, beyond noting their common character: that of signifying the system's objective capacity to be found later to possess a property in actuality. For such actualization, Heisenberg required measurement to have taken place, an interaction with external systems that disrupts the otherwise independent, natural evolution of the quantum system. The notion of state actualization was later taken up by others, including Shimony, in the search for a law-like measurement process. Yet, the relation of quantum potentiality to Aristotle's original notion has been viewed as mainly terminological, even by those who used it thus. Here, I reconsider the relation of Heisenberg's notion to Aristotle's and show that it can be explicated in greater specificity than Heisenberg did. This is accomplished through the careful consideration of the role of potentia in physical causation and explanation, and done in order to provide a fuller understanding of this aspect of Heisenberg's approach to quantum mechanics. Most importantly, it is pointed out that Heisenberg's requirement of an external intervention during measurement that disrupts the otherwise independent, natural evolution of the quantum system is in accord with Aristotle's characterization of spontaneous causation. Thus, the need for a teleological understanding of the actualization of potentia, an often assumed requirement that has left this fundamental notion neglected, is seen to be spurious.This article is part of the themed issue 'Second quantum revolution: foundational questions'. © 2017 The Author(s).

  2. Quantum potentiality revisited

    Science.gov (United States)

    Jaeger, Gregg

    2017-10-01

    Heisenberg offered an interpretation of the quantum state which made use of a quantitative version of an earlier notion, , of Aristotle by both referring to it using its Latin name, potentia, and identifying its qualitative aspect with . The relationship between this use and Aristotle's notion was not made by Heisenberg in full detail, beyond noting their common character: that of signifying the system's objective capacity to be found later to possess a property in actuality. For such actualization, Heisenberg required measurement to have taken place, an interaction with external systems that disrupts the otherwise independent, natural evolution of the quantum system. The notion of state actualization was later taken up by others, including Shimony, in the search for a law-like measurement process. Yet, the relation of quantum potentiality to Aristotle's original notion has been viewed as mainly terminological, even by those who used it thus. Here, I reconsider the relation of Heisenberg's notion to Aristotle's and show that it can be explicated in greater specificity than Heisenberg did. This is accomplished through the careful consideration of the role of potentia in physical causation and explanation, and done in order to provide a fuller understanding of this aspect of Heisenberg's approach to quantum mechanics. Most importantly, it is pointed out that Heisenberg's requirement of an external intervention during measurement that disrupts the otherwise independent, natural evolution of the quantum system is in accord with Aristotle's characterization of spontaneous causation. Thus, the need for a teleological understanding of the actualization of potentia, an often assumed requirement that has left this fundamental notion neglected, is seen to be spurious. This article is part of the themed issue `Second quantum revolution: foundational questions'.

  3. Identifying potential academic leaders

    Science.gov (United States)

    White, David; Krueger, Paul; Meaney, Christopher; Antao, Viola; Kim, Florence; Kwong, Jeffrey C.

    2016-01-01

    Objective To identify variables associated with willingness to undertake leadership roles among academic family medicine faculty. Design Web-based survey. Bivariate and multivariable analyses (logistic regression) were used to identify variables associated with willingness to undertake leadership roles. Setting Department of Family and Community Medicine at the University of Toronto in Ontario. Participants A total of 687 faculty members. Main outcome measures Variables related to respondents’ willingness to take on various academic leadership roles. Results Of all 1029 faculty members invited to participate in the survey, 687 (66.8%) members responded. Of the respondents, 596 (86.8%) indicated their level of willingness to take on various academic leadership roles. Multivariable analysis revealed that the predictors associated with willingness to take on leadership roles were as follows: pursuit of professional development opportunities (odds ratio [OR] 3.79, 95% CI 2.29 to 6.27); currently holding at least 1 leadership role (OR 5.37, 95% CI 3.38 to 8.53); a history of leadership training (OR 1.86, 95% CI 1.25 to 2.78); the perception that mentorship is important for one’s current role (OR 2.25, 95% CI 1.40 to 3.60); and younger age (OR 0.97, 95% CI 0.95 to 0.99). Conclusion Willingness to undertake new or additional leadership roles was associated with 2 variables related to leadership experiences, 2 variables related to perceptions of mentorship and professional development, and 1 demographic variable (younger age). Interventions that support opportunities in these areas might expand the pool and strengthen the academic leadership potential of faculty members. PMID:27331226

  4. PV potential and potential PV rent in European regions

    DEFF Research Database (Denmark)

    Hansen, Anders Chr.; Thorn, Paul

    2013-01-01

    The paper provides a GIS based model for assessing the potentials of photovoltaic electricity in Europe by NUTS 2 regions. The location specific energy potential per PV-­‐panel area is estimated based on observations of solar irradiation, conversion efficiency, levelised costs and the social value...... of PV-­‐electricity. Combined with the potential density of PV-­‐panel area based on land cover and environental restrictions, the PV energy potential and the potential PV ressource rent is calculated. These calculations enbable the model to estimate the regional patterns at NUTS 2 level...

  5. VT Act 174 Wind Potential

    Data.gov (United States)

    Vermont Center for Geographic Information — (Link to Metadata) The statewide wind potential layer used in the Act 174 effort represents three combined wind resource layers: Potential Residential and Small and...

  6. Evaluating Pesticides for Carcinogenic Potential

    Science.gov (United States)

    EPA reviews pesticides for potential carcinogenicity. Learn about EPA's guidelines for evaluating a chemical's potential carcinogenicity and updates to EPA's guidelines to reflect increased understanding of ways chemicals may cause cancer.

  7. Potential and the early human.

    OpenAIRE

    Watt, H.

    1996-01-01

    Some form of potential or "capacity" is often seen as evidence of human moral status. Opinions differ as to whether the potential of the embryo should be regarded as such evidence. In this paper, I discuss some common arguments against regarding the embryo's potential as a sign of human status, together with some less common arguments in favour of regarding the embryo's potential in this way.

  8. Dynamical torsion and torsion potential

    OpenAIRE

    Xie, Hong-Jun; Shirafuji, Takeshi

    1996-01-01

    We introduce a generalized tetrad which plays the role of a potential for torsion and makes torsion dynamic. Starting from the Einstein-Cartan action with torsion, we get two field equations, the Einstein equation and the torsion field equation by using the metric tensor and the torsion potential as independent variables; in the former equation the torsion potential plays the role of a matter field. We also discuss properties of local linear transformations of the torsion potential and give a...

  9. Higgs potential and fundamental physics

    Science.gov (United States)

    Melo, Ivan

    2017-11-01

    Physics associated with the Higgs field potential is rich and interesting and deserves a concise summary for a broader audience to appreciate the beauty and the challenges of this subject. We discuss the role of the Higgs potential in particle physics, in particular in spontaneous symmetry breaking and in mass generation using an example of a simple reflection symmetry, then continue with temperature and quantum corrections to the potential which lead us to the naturalness problem and vacuum stability.

  10. Plasmas: Diversity, pervasiveness and potential

    Energy Technology Data Exchange (ETDEWEB)

    Eastman, Timothy E.

    1998-01-01

    When considered inclusively, plasma science and technology encompass immense diversity, pervasiveness and potential: diversity through numerous topical areas (see list of nearly 200 in Table II); pervasiveness with examples covering the full range of energy, time and spatial scale; and potential through innumerable current and future applications.

  11. Supermodular Games and Potential Games

    OpenAIRE

    Brânzei, R.; Mallozzi, L.; Tijs, S.H.

    2001-01-01

    Potential games and supermodular games are attractive games, especially because under certain conditions they possess pure Nash equilibria. Subclasses of games with a potential are considered which are also strategically equivalent to supermodular games. The focus is on two-person zero-sum games and two-person Cournot games.

  12. Supermodular Games and Potential Games

    NARCIS (Netherlands)

    Brânzei, R.; Mallozzi, L.; Tijs, S.H.

    2001-01-01

    Potential games and supermodular games are attractive games, especially because under certain conditions they possess pure Nash equilibria. Subclasses of games with a potential are considered which are also strategically equivalent to supermodular games. The focus is on two-person zero-sum games and

  13. Potential for structural lumber substitutes

    Science.gov (United States)

    Theodore L. Laufenberg

    1985-01-01

    The potential for substitution of structural wood composites into solid-sawn lumber markets is presented from the technological viewpoint. Technological limitations of existing composite processes and products are reviewed in the context of the present laminated veneer lumber (LVL), flakeboard, and fiber/ paper industries. The limits of mechanical property potential...

  14. Fertility potential after unilateral orchiopexy

    DEFF Research Database (Denmark)

    Cortes, D; Thorup, J M; Lindenberg, S

    1996-01-01

    . CONCLUSIONS: The age matched number of spermatogonia per tubular cross section is significant in regard to fertility potential, and a value of 1% or less (approximately Sertoli cells only) may predict low fertility potential. To our knowledge Sertoli cells only have not been observed before 15 months of life...

  15. Spacetime Metrics from Gauge Potentials

    Directory of Open Access Journals (Sweden)

    Ettore Minguzzi

    2014-03-01

    Full Text Available I present an approach to gravity in which the spacetime metric is constructed from a non-Abelian gauge potential with values in the Lie algebra of the group U(2 (or the Lie algebra of quaternions. If the curvature of this potential vanishes, the metric reduces to a canonical curved background form reminiscent of the Friedmann S3 cosmological metric.

  16. Exploring the potential of the São Paulo Potential

    Directory of Open Access Journals (Sweden)

    Shorto J.M.B.

    2010-03-01

    Full Text Available Recent development of an imaginary potential based on the São Paulo potential is briefly presented. Further developments of the model in order to describe weakly bound systems (e.g. 7Li +120Sn are discussed and compared to experimental data. New preliminary data on the 18O+110Pd transitional system are also presented and apparent similarities to the weakly bound case are commented.

  17. Potential theory—selected topics

    CERN Document Server

    Aikawwa, Hiroaki

    1996-01-01

    The first part of these lecture notes is an introduction to potential theory to prepare the reader for later parts, which can be used as the basis for a series of advanced lectures/seminars on potential theory/harmonic analysis. Topics covered in the book include minimal thinness, quasiadditivity of capacity, applications of singular integrals to potential theory, L(p)-capacity theory, fine limits of the Nagel-Stein boundary limit theorem and integrability of superharmonic functions. The notes are written for an audience familiar with the theory of integration, distributions and basic functional analysis.

  18. Potential Theory Surveys and Problems

    CERN Document Server

    Lukeš, Jaroslav; Netuka, Ivan; Veselý, Jiří

    1988-01-01

    The volume comprises eleven survey papers based on survey lectures delivered at the Conference in Prague in July 1987, which covered various facets of potential theory, including its applications in other areas. The survey papers deal with both classical and abstract potential theory and its relations to partial differential equations, stochastic processes and other branches such as numerical analysis and topology. A collection of problems from potential theory, compiled on the occasion of the conference, is included, with additional commentaries, in the second part of this volume.

  19. Vector Games with Potential Function

    Directory of Open Access Journals (Sweden)

    Lucia Pusillo

    2017-09-01

    Full Text Available The theory of non cooperative games with potential function was introduced by Monderer and Shapley in 1996. Such games have interesting properties, among which is the existence of equilibria in pure strategies. The paper by Monderer and Shapley has inspired many game theory researchers. In the present paper, many classes of multiobjective games with potential functions are studied. The notions of generalized, best-reply and Pareto potential games are introduced in a multicriteria setting. Some properties and Pareto equilibria are investigated.

  20. Potential Leaders and Democratic Values

    Science.gov (United States)

    Monsma, Stephen V.

    1971-01-01

    Indicates that potential contenders for public office are likely to be more knowledgeable, interested, and libertarian than the average citizen. Concludes that these differences exist before leaders are elected and that this discrimination is functional in a democracy. (MB)

  1. Singular potentials in quantum mechanics

    Energy Technology Data Exchange (ETDEWEB)

    Aguilera-Navarro, V.C. [Instituto de Fisica Teorica (IFT), Sao Paulo, SP (Brazil); Koo, E. Ley [Universidad Nacional Autonoma de Mexico, Mexico City (Mexico). Inst. de Fisica

    1995-10-01

    This paper is a review of some mathematical methods as recently developed and applied to deal with singular potentials in Quantum Mechanics. Regular and singular perturbative methods as well as variational treatments are considered. (author). 25 refs.

  2. STUDENTS’ POTENTIAL FOR AUTHENTIC LEADERSHIP

    OpenAIRE

    Djurdja Solesa-Grijak; Dragan Solesa; Nedjo Kojic

    2015-01-01

    To know yourself and to act accordingly has been seen as a moral imperative throughout history. The aim of this research was to determine potential of students for authentic leadership and relation between their authentic personality and potential for authentic leadership. The sample consisted of students (N=133) from Serbia (male – 59% and female – 41%). The average age of students was M=21.9. Instruments used were Authenticity Scale (Wood et al., 2008) and Authentic Leadership Self-Assessme...

  3. The Biodiversity Informatics Potential Index

    OpenAIRE

    Ariño Arturo H; Chavan Vishwas; King Nick

    2011-01-01

    Abstract Background Biodiversity informatics is a relatively new discipline extending computer science in the context of biodiversity data, and its development to date has not been uniform throughout the world. Digitizing effort and capacity building are costly, and ways should be found to prioritize them rationally. The proposed 'Biodiversity Informatics Potential (BIP) Index' seeks to fulfill such a prioritization role. We propose that the potential for biodiversity informatics be assessed ...

  4. Finite-Temperature Higgs Potentials

    Directory of Open Access Journals (Sweden)

    Dolgopolov M.V.

    2016-01-01

    Full Text Available In the present article we consider the short description of the “Finite-Temperature Higgs Potentials” program for calculating loop integrals at vanishing external momenta and applications for extended Higgs potentials reconstructions. Here we collect the analytic forms of the relevant loop integrals for our work in reconstruction of the effective Higgs potential parameters in extended models (MSSM, NMSSM and etc..

  5. MODELING WORLD BIOENERGY CROP POTENTIAL

    Science.gov (United States)

    Hagiwara, Kensuke; Hanasaki, Naota; Kanae, Shinjiro

    Bioenergy is regarded as clean energy due to its characteristics and expected to be a new support of world energy de¬mand, but there are few integrated assessments of the potential of bioenergy considering sustainable land use. We esti¬mated the global bioenergy potential with an integrated global water resources model, the H08. It can simulate the crop yields on global-scale at a spatial resolution of 0.50.5. Seven major crops in the world were considered; namely, maize, sugar beet, sugar cane, soybean, rapeseed, rice, and wheat, of which the first 5 are commonly used to produce biofuel now. Three different land-cover types were chosen as potential area for cultivation of biofuel-producing crop: fallow land, grassland, and portion of forests (excluding areas sensitive for biodiversity such as frontier forest). We attempted to estimate the maximum global bioenergy potential and it was estimated to be 1120EJ. Bioenergy potential depends on land-use limitations for the protection of bio-diversity and security of food. In another condition which assumed more land-use limitations, bioenergy potential was estimated to be 70-233EJ.

  6. Spatiotemporal deformations of reflectionless potentials

    Science.gov (United States)

    Horsley, S. A. R.; Longhi, S.

    2017-08-01

    Reflectionless potentials for classical or matter waves represent an important class of scatteringless systems encountered in different areas of physics. Here we mathematically demonstrate that there is a family of non-Hermitian potentials that, in contrast to their Hermitian counterparts, remain reflectionless even when deformed in space or time. These are the profiles that satisfy the spatial Kramers-Kronig relations. We start by considering scattering of matter waves for the Schrödinger equation with an external field, where a moving potential is observed in the Kramers-Henneberger reference frame. We then generalize this result to the case of electromagnetic waves, by considering a slab of reflectionless material that both is scaled and has its center displaced as an arbitrary function of position. We analytically and numerically demonstrate that the backscattering from these profiles remains zero, even for extreme deformations. Our results indicate the supremacy of non-Hermitian Kramers-Kronig potentials over reflectionless Hermitian potentials in keeping their reflectionless property under deformation and could find applications to, e.g., reflectionless optical coatings of highly deformed surfaces based on perfect absorption.

  7. Streaming potential measurements of biosurfaces

    Science.gov (United States)

    Van Wagenen, R. A.; Andrade, J. D.; Hibbs, J. B., Jr.

    1976-01-01

    A technique based on the measurement of streaming potentials has been developed to evaluate the electrokinetic region of the cell periphery. This approach is feasible for cell lines propagated in in-vitro cell cultures in monolayer form. The advantage of this system is that cells may be evaluated in the living state atttached to a substrate; it is not necessary to subject the cells to enzymatic, chemical, or mechanical trauma required to obtain monodisperse suspensions which are then normally evaluated by microelectrophoresis. In this manner, it should be possible to study the influence of substrate and environmental factors on the charge density and potential at the cell periphery. The apparatus and procedure are described as well as some results concerning the electrokinetic potential of borosilicate capillaries as a function of ionic strength, pH, and temperature. The effect that turbulence and entrance flow conditions have on accurate streaming-potential measurements is discussed. The electrokinetic potential of BALB/c 3T12 fibroblasts has been quantified as a function of pH, ionic strength, glutaraldehyde fixation, and Giemsa staining.

  8. The Potential of Conductivity, Redox Potential and Dissolved ...

    African Journals Online (AJOL)

    The aim of this study was therefore to explore the potential of DO, Eh and Co in milk quality assessment. Raw milk, lactoperoxidase system (LP-s) activated raw milk and LP-s activated Ultra High Temperature (UHT) milk inoculated singly with pure strains were used in this study. The performances of DO, Eh and Co in ...

  9. The potential of biogas energy

    Energy Technology Data Exchange (ETDEWEB)

    Acaroglu, M.; Hepbasli, A. [Selcuk University, Konya (Turkey). Technical Science College, Department of Agricultural Machinery; Kocar, G. [Ege University, Izmir (Turkey). Solar Energy Institute

    2005-02-15

    Biogas technology has been known about for a long time, but in recent years the interest in it has significantly increased, especially due to the higher costs and the rapid depletion of fossil fuels as well as their environmental considerations. The main objective of the present study is to investigate the potential of biogas energy in the 15 European Union (EU) countries and in Turkey, which is seeking admission to the EU and is trying to meet EU environmental standards. Biogas energy potential of the 15 EU countries is estimated to be about 800 PJ. Besides this, Turkey's annual animal waste potential is obtained to be about 11.81 million tons with a biogas energy equivalent of 53.6 PJ. It is expected that this study will be helpful in developing highly applicable and productive planning for energy policies towards the optimum utilization of biogas energy. (author)

  10. Image potential in lossy dielectrics

    Science.gov (United States)

    Lenac, Z.

    2017-11-01

    The interaction of a point charge with surrounding media ( the image potential) is analyzed using the quantum-mechanical description of dielectrics that consistently takes losses in media into account. We have derived a real dielectric function (without an imaginary part) appropriate for lossy dielectrics which, compared to the lossless one, significantly changes the image potential in the standard (first-order) calculations. However, when one adds to the Hamiltonian all higher-order terms caused by the losses, one finds that the image potential remains the same, as if there were no losses in media. Our calculations are approximative when analyzing complicated systems with various lossy dielectrics, but in some simple and essential cases ( e.g., a dielectric plate) we are able to give the exact proof.

  11. Fertility potential after unilateral orchiopexy

    DEFF Research Database (Denmark)

    Cortes, D; Thorup, J M; Lindenberg, S

    1996-01-01

    PURPOSE: We evaluated whether adult fertility potential was better when unilateral orchiopexy was done at ages 2 to 6 years or later, and we identified those at risk for infertility. MATERIALS AND METHODS: Unilateral orchiopexy was performed simultaneously with testicular biopsy in 11 patients 2...... similar fertility potentials were found in adulthood. Five of the 65 patients (7.7%, 95% confidence limits 2.5 to 17%) may experience infertility, representing 33% of both groups with less than 1% of the age matched number of spermatogonia per tubular transverse section (approximately no germ cells......) in the biopsy specimen at orchiopexy. CONCLUSIONS: Between ages 2 and 12 years the timing of unilateral orchiopexy may vary without an effect on subsequent fertility potential. When biopsy at surgery lacks germ cells, there is an approximately 33% age independent risk of subsequent infertility. Otherwise...

  12. Potential Theory of Multicomponent Adsorption

    DEFF Research Database (Denmark)

    Shapiro, Alexander; Stenby, Erling Halfdan

    1998-01-01

    We developed a theory of multicomponent adsorption on the basis of the potential concept originally suggested by Polanyi. The mixture is considered as a heterogeneous substance segregated in the external field emitted by the adsorbent. The same standard equation of state, with no additional fitting...... parameters, is used for the segregated and for the bulk phases. With this approach, few parameters are needed to correlate pure component adsorption isotherms. These parameters may be used to predict adsorption equilibria of multicomponent mixtures without additional adjustment. A connection between...... the potential theory and the spreading pressure concept is established, and problems of the theory consistency are studied. Numerical algorithms are suggested for evaluation of the segregated state of the mixture in the potential field of adsorption forces. Comparison with experimental data shows good agreement...

  13. Handbook methane potential; Handbok metanpotential

    Energy Technology Data Exchange (ETDEWEB)

    Carlsson, My (AnoxKaldnes AB (Sweden)); Schnurer, Anna (Swedish Univ. of Agricultural Sciences, Uppsala (Sweden))

    2011-07-15

    Before using a organic material for biogas production it is essential to evaluate the methane production potential. The methane potential is one important tool possible to use during planning of new plants but also when new materials are considered for already running biogas plants. The chemical composition of different organic material varies extensively and this will have an impact on both the degradability and the methane potential. Information about the methane potential of a specific material can sometimes be found in the literature or can be calculated after a chemical/ physical or biological characterization. Here, the BMP test (Biochemical Methane Potential) is a commonly used method. Today the BMP test is a commonly used method to determine the methane potential. Many national and international research groups, consultants as well as personal at biogas plants are using this method and there is a lot of data available in the literature from such tests. In addition there are several protocols giving guidelines on how to execute a BMP-test. The BMP-test is performed in many different ways, not always under optimized conditions, and there is a lack of information on how to interpret the obtained data. This report summarizes knowledge from the literature and the experience from a Swedish referee group, consisting of persons being active performers of BMP-tests. The report does not include a standardized protocol as the procedure can be performed in different ways depending on available equipment and on the type of material to be tested. Instead the report discusses different factors of great importance for a successful test giving reliable results. The report also summarizes important information concerning the interpretation and how to present results in order to allow comparison of data from different test.

  14. Diatomic interaction potential theory applications

    CERN Document Server

    Goodisman, Jerry

    2013-01-01

    Diatomic Interaction Potential Theory, Volume 2: Applications discusses the variety of applicable theoretical material and approaches in the calculations for diatomic systems in their ground states. The volume covers the descriptions and illustrations of modern calculations. Chapter I discusses the calculation of the interaction potential for large and small values of the internuclear distance R (separated and united atom limits). Chapter II covers the methods used for intermediate values of R, which in principle means any values of R. The Hartree-Fock and configuration interaction schemes des

  15. Translating barriers into potential improvements

    DEFF Research Database (Denmark)

    Altintzoglou, Themistoklis; Hansen, Karina Birch; Valsdottir, Thora

    2010-01-01

    Purpose: The aim of this study is to explore potential barriers to seafood consumption by The aim of this study is to explore potential barriers to seafood consumption by young adults and the parents of young children. Knowledge of these barriers will be used to assist the development of new...... about the amount of effort required to prepare it. These concerns resulted in an expression of their need for products that are attractive, healthy, palatable, and convenient. In particular, the newly developed products should be accompanied by clear advice on preparation methods and materials...

  16. Death Education and Suicide Potentiality.

    Science.gov (United States)

    Rosenthal, Nina Ribak

    1983-01-01

    Assessed whether a death education course attracted students with significantly different attitudes toward death. Results indicated that the death education class did attract persons with greater acceptance of suicide and death. The course tended to further decrease avoidance and increase acceptance. Potentiality for committing suicide was not…

  17. ANTAGONISTIC POTENTIAL OF FLUORESCENT Pseudomonas ...

    African Journals Online (AJOL)

    Prof. Adipala Ekwamu

    Thus, Pf5 the powerful siderophore producer (866 µg mg-1 protein) has the potential to suppress the activity of pathogens and enhance the plant growth. ACKNOWLEDGEMENT. The financial support provided for this work by the University Grants Commission, South Eastern. Regional Office, Hyderabad [File No. MRP-658/.

  18. Manyfield inflation in random potentials

    Science.gov (United States)

    Bjorkmo, Theodor; Marsh, M. C. David

    2018-02-01

    We construct models of inflation with many randomly interacting fields and use these to study the generation of cosmological observables. We model the potentials as multi-dimensional Gaussian random fields (GRFs) and identify powerful algebraic simplifications that, for the first time, make it possible to access the manyfield limit of inflation in GRF potentials. Focussing on small-field, slow-roll, approximate saddle-point inflation in potentials with structure on sub-Planckian scales, we construct explicit examples involving up to 100 fields and generate statistical ensembles comprising of 164,000 models involving 5 to 50 fields. For the subset of these that support at least sixty e-folds of inflation, we use the 'transport method' and δ N formalism to determine the predictions for cosmological observables at the end of inflation, including the power spectrum and the local non-Gaussianities of the primordial perturbations. We find three key results: i) Planck compatibility is not rare, but future experiments may rule out this class of models; ii) In the manyfield limit, the predictions from these models agree well with, but are sharper than, previous results derived using potentials constructed through non-equilibrium Random Matrix Theory; iii) Despite substantial multifield effects, non-Gaussianities are typically very small: fNLloc ll 1. We conclude that many of the 'generic predictions' of single-field inflation can be emergent features of complex inflation models.

  19. Potential methane reservoirs beneath Antarctica

    NARCIS (Netherlands)

    Wadham, J.L.; Arndt, S.|info:eu-repo/dai/nl/304835706; Tulaczyk, S.; Stibal, M.; Tranter, M.; Telling, J.; Lis, G.P.; Lawson, E.; Ridgwell, A.; Dubnick, A.; Sharp, M.J.; Anesio, A.M.; Butler, C.E.H.

    2012-01-01

    Once thought to be devoid of life, the ice-covered parts of Antarctica are now known to be a reservoir of metabolically active microbial cells and organic carbon. The potential for methanogenic archaea to support the degradation of organic carbon to methane beneath the ice, however, has not yet been

  20. Geometric phase and quantum potential

    OpenAIRE

    Dandoloff, R.

    2002-01-01

    We show that the geometric phase of Levy-Leblond arises from a low of parallel transport for wave functions and point out that this phase belongs to a new class of geometric phases due to the presence of a quantum potential.

  1. Smartphones: A Potential Discovery Tool

    Directory of Open Access Journals (Sweden)

    Wendy Starkweather

    2009-09-01

    Full Text Available The anticipated wide adoption of smartphones by researchers is viewed by the authors as a basis for developing mobile-based services. In response to the UNLV Libraries’ strategic plan’s focus on experimentation and outreach, the authors investigate the current and potential role of smartphones as a valuable discovery tool for library users.

  2. Evolutionary potential games on lattices

    Energy Technology Data Exchange (ETDEWEB)

    Szabó, György, E-mail: szabo@mfa.kfki.hu; Borsos, István, E-mail: borsos@mfa.kfki.hu

    2016-04-05

    Game theory provides a general mathematical background to study the effect of pair interactions and evolutionary rules on the macroscopic behavior of multi-player games where players with a finite number of strategies may represent a wide scale of biological objects, human individuals, or even their associations. In these systems the interactions are characterized by matrices that can be decomposed into elementary matrices (games) and classified into four types. The concept of decomposition helps the identification of potential games and also the evaluation of the potential that plays a crucial role in the determination of the preferred Nash equilibrium, and defines the Boltzmann distribution towards which these systems evolve for suitable types of dynamical rules. This survey draws parallel between the potential games and the kinetic Ising type models which are investigated for a wide scale of connectivity structures. We discuss briefly the applicability of the tools and concepts of statistical physics and thermodynamics. Additionally the general features of ordering phenomena, phase transitions and slow relaxations are outlined and applied to evolutionary games. The discussion extends to games with three or more strategies. Finally we discuss what happens when the system is weakly driven out of the “equilibrium state” by adding non-potential components representing games of cyclic dominance.

  3. Bitcoin's Potential for Going Mainstream

    NARCIS (Netherlands)

    Kasiyanto, Safari

    2016-01-01

    This paper reviews the possibility of bringing Bitcoin into the mainstream. In so doing, it elaborates the potential and obstacles of the Bitcoin system and what it would take for it to go mainstream. A cross-cutting discussion provides a helicopter view and encompasses the technical, economic,

  4. [Late potentials and ventricular arrhythmia].

    Science.gov (United States)

    Adamec, R; Zimmermann, M

    1986-04-01

    When electrodes are placed at the surface of the thorax, high-amplification electrocardiography (HA-ECG) combined with signal summation as a function of time provides a non-invasive method for detecting electric potentials occurring after the QRS complex of the clinical electrocardiogram. These potentials are called late, and can probably be likened to the "divided" or "fragmented" potentials recorded directly on the heart or in its ventricles near zones of ischemia, infarction or aneurysm. The prevalence of late potentials of ventricular activation (LPVA) and their association with the occurrence of ventricular arrhythmias seems well established, notably in the presence of ventricular aneurysm and anamnesis of severe ventricular arrhythmia. Some studies have shown that detection of LPVAs is of value in identifying heart patients at risk of ventricular arrhythmia or sudden death. Heart disease aside, the presence of LPVAs has been demonstrated in arrhythmogenic right ventricular dysplasia and reported in Fallot's tetralogy after complete correction. A standardization of recordings and a more precise definition of LPVAs are necessary before HA-ECG can become a routine clinical method. Further, the possibility of "beat by beat" recordings with "spatial" summation will allow detection of LPVAs which vary with time and in nature and hence provide a better understanding of the genesis of ventricular arrhythmias.

  5. Riesz potential versus fractional Laplacian

    KAUST Repository

    Ortigueira, Manuel Duarte

    2014-09-01

    This paper starts by introducing the Grünwald-Letnikov derivative, the Riesz potential and the problem of generalizing the Laplacian. Based on these ideas, the generalizations of the Laplacian for 1D and 2D cases are studied. It is presented as a fractional version of the Cauchy-Riemann conditions and, finally, it is discussed with the n-dimensional Laplacian.

  6. Health Educational Potentials of Technologies

    DEFF Research Database (Denmark)

    Magnussen, Rikke; Aagaard-Hansen, Jens

    2012-01-01

    The field of health promotion technology has been in an exponential growth in recent years and smart phone applications, exer-games and self-monitoring devices has become part of fitness activities and health education. In this work-in-progress-paper theoretical perspectives for categorising...... and analysing health educational potentials of technologies are presented....

  7. Potential Theory for Directed Networks

    Science.gov (United States)

    Zhang, Qian-Ming; Lü, Linyuan; Wang, Wen-Qiang; Zhou, Tao

    2013-01-01

    Uncovering factors underlying the network formation is a long-standing challenge for data mining and network analysis. In particular, the microscopic organizing principles of directed networks are less understood than those of undirected networks. This article proposes a hypothesis named potential theory, which assumes that every directed link corresponds to a decrease of a unit potential and subgraphs with definable potential values for all nodes are preferred. Combining the potential theory with the clustering and homophily mechanisms, it is deduced that the Bi-fan structure consisting of 4 nodes and 4 directed links is the most favored local structure in directed networks. Our hypothesis receives strongly positive supports from extensive experiments on 15 directed networks drawn from disparate fields, as indicated by the most accurate and robust performance of Bi-fan predictor within the link prediction framework. In summary, our main contribution is twofold: (i) We propose a new mechanism for the local organization of directed networks; (ii) We design the corresponding link prediction algorithm, which can not only testify our hypothesis, but also find out direct applications in missing link prediction and friendship recommendation. PMID:23408979

  8. Ignition potential of rifle bullets

    Science.gov (United States)

    Trevor Maynard; Mark Finney; Sara McAllister; Ian Grob

    2013-01-01

    In January 2013, the U.S. Department of Agriculture Forest Service's Rocky Mountain Research Station and National Technology and Development Centers performed experiments to evaluate the potential for rifle bullets to ignite organic matter after striking hard surfaces. Outdoor target shooting is often suspected as a wildfire cause, but investigators currently do...

  9. Hydrogeological Investigation and Groundwater Potential ...

    African Journals Online (AJOL)

    The paper assesses groundwater quality and productivity in Haromaya watershed, eastern Ethiopia. Continuous pumping test data, collected from seven boreholes was used to determine productivity of the aquifers. 14 water samples were tested for water quality. The aquifers on the basis of permeability, potential and ...

  10. The hydrogeothermal potential of Southern Hesse; Das hydrogeothermische Potential Suedhessens

    Energy Technology Data Exchange (ETDEWEB)

    Fitzer, C.; Fluhrer, S.; Sanner, B.; Knoblich, K. [Giessen Univ. (Germany). Inst. fuer Angewandte Geowissenschaften

    1997-12-01

    The paper investigates rock series suited as storage media and the temperature distribution in the subsurface of Southern Hesse. It gives an idea of the possibilities for hydrogeothermal energy use in the area. The densily populated Rhein-Main-region provides a good demand potential for geothermal heat. A substantially elevated geothermal gradient of about 60 K/km as compared to the continental average of 30 K/km could be demonstrated in the northern part of the Upper Rhine Graben. Thermal anomalies could be localised. The Rotliegend-layers (Perm) provide the highest geothermal ressources in the region. In more shallow depth, the Hydrobia layers (Teritary) show reasonable values. To the north, the potential of these series decreases. Hence hydrogeothermal energy use should not be considered in the northern part of Southern Hesse. The highest potential can be expected from the Rotliegend layers in the area of Stockstadt and Biebesheim. (orig.) [Deutsch] Die Untersuchung geht auf die moeglichen Speichergesteine und die Temperaturverteilung im Untergrund Suedhessens ein und gibt einen ersten Eindruck von den Moeglichkeiten zur Nutzung der Hydrogeothermie in der Region. Fuer geothermische Waerme besteht im dicht besiedelten Rhein-Main-Gebiet eine gute Abnehmerstruktur. Im noerdlichen Oberrheingraben konnte im Mittel ein deutlich erhoehter Temperaturgradient von etwa 60 K/km gegenueber dem kontinentalen Krustendurchschnittswert von 30 K/km nachgewiesen werden. Waemeanomalien wurden lokalisiert. Die Rotliegendschichten weisen im untersuchten Gebiet eindeutig die hoechsten Ressourcen auf. In geringerer Tiefenlage erzielen die Hydrobienschichten noch beachtliche Werte. Nach Norden nimmt das Potential der Schichten ab. Daher ist von einer Nutzung der Hydrogeothermie im noerdlichen Bereich Suedhessens eher abzuraten. Die hoechsten Ressourcen in Suedhessen sind im Bereich von Stockstadt und Biebesheim in den Rotliegenschichten zu erwarten. (orig.)

  11. Geothermal heat. Potential, danger, efficiency; Erdwaerme. Potential, Gefahr, Nutzen

    Energy Technology Data Exchange (ETDEWEB)

    Reichel, Wolfgang [Ingenieurbuero Timmer Reichel GmbH, Haan (Germany)

    2010-07-01

    The author of the contribution under consideration reports on the potential, danger and utilization of geothermal heat. Geothermal heat promises the solution of numerous energy problems. From the use of near-surface layers which substantially are affected by enviromental impacts such as solar radiation up to the depth use of the heat flow from the interior of the earth, there exist very different energy sources which are to be considered separately for each application.

  12. Remote RemoteRemoteRemote sensing potential for sensing ...

    African Journals Online (AJOL)

    Remote RemoteRemoteRemote sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing p.

  13. Decoupling Action Potential Bias from Cortical Local Field Potentials

    Directory of Open Access Journals (Sweden)

    Stephen V. David

    2010-01-01

    Full Text Available Neurophysiologists have recently become interested in studying neuronal population activity through local field potential (LFP recordings during experiments that also record the activity of single neurons. This experimental approach differs from early LFP studies because it uses high impendence electrodes that can also isolate single neuron activity. A possible complication for such studies is that the synaptic potentials and action potentials of the small subset of isolated neurons may contribute disproportionately to the LFP signal, biasing activity in the larger nearby neuronal population to appear synchronous and cotuned with these neurons. To address this problem, we used linear filtering techniques to remove features correlated with spike events from LFP recordings. This filtering procedure can be applied for well-isolated single units or multiunit activity. We illustrate the effects of this correction in simulation and on spike data recorded from primary auditory cortex. We find that local spiking activity can explain a significant portion of LFP power at most recording sites and demonstrate that removing the spike-correlated component can affect measurements of auditory tuning of the LFP.

  14. The Biodiversity Informatics Potential Index

    Science.gov (United States)

    2011-01-01

    Background Biodiversity informatics is a relatively new discipline extending computer science in the context of biodiversity data, and its development to date has not been uniform throughout the world. Digitizing effort and capacity building are costly, and ways should be found to prioritize them rationally. The proposed 'Biodiversity Informatics Potential (BIP) Index' seeks to fulfill such a prioritization role. We propose that the potential for biodiversity informatics be assessed through three concepts: (a) the intrinsic biodiversity potential (the biological richness or ecological diversity) of a country; (b) the capacity of the country to generate biodiversity data records; and (c) the availability of technical infrastructure in a country for managing and publishing such records. Methods Broadly, the techniques used to construct the BIP Index were rank correlation, multiple regression analysis, principal components analysis and optimization by linear programming. We built the BIP Index by finding a parsimonious set of country-level human, economic and environmental variables that best predicted the availability of primary biodiversity data accessible through the Global Biodiversity Information Facility (GBIF) network, and constructing an optimized model with these variables. The model was then applied to all countries for which sufficient data existed, to obtain a score for each country. Countries were ranked according to that score. Results Many of the current GBIF participants ranked highly in the BIP Index, although some of them seemed not to have realized their biodiversity informatics potential. The BIP Index attributed low ranking to most non-participant countries; however, a few of them scored highly, suggesting that these would be high-return new participants if encouraged to contribute towards the GBIF mission of free and open access to biodiversity data. Conclusions The BIP Index could potentially help in (a) identifying countries most likely to

  15. The Biodiversity Informatics Potential Index.

    Science.gov (United States)

    Ariño, Arturo H; Chavan, Vishwas; King, Nick

    2011-01-01

    Biodiversity informatics is a relatively new discipline extending computer science in the context of biodiversity data, and its development to date has not been uniform throughout the world. Digitizing effort and capacity building are costly, and ways should be found to prioritize them rationally. The proposed 'Biodiversity Informatics Potential (BIP) Index' seeks to fulfill such a prioritization role. We propose that the potential for biodiversity informatics be assessed through three concepts: (a) the intrinsic biodiversity potential (the biological richness or ecological diversity) of a country; (b) the capacity of the country to generate biodiversity data records; and (c) the availability of technical infrastructure in a country for managing and publishing such records. Broadly, the techniques used to construct the BIP Index were rank correlation, multiple regression analysis, principal components analysis and optimization by linear programming. We built the BIP Index by finding a parsimonious set of country-level human, economic and environmental variables that best predicted the availability of primary biodiversity data accessible through the Global Biodiversity Information Facility (GBIF) network, and constructing an optimized model with these variables. The model was then applied to all countries for which sufficient data existed, to obtain a score for each country. Countries were ranked according to that score. Many of the current GBIF participants ranked highly in the BIP Index, although some of them seemed not to have realized their biodiversity informatics potential. The BIP Index attributed low ranking to most nonparticipant countries; however, a few of them scored highly, suggesting that these would be high-return new participants if encouraged to contribute towards the GBIF mission of free and open access to biodiversity data. The BIP Index could potentially help in (a) identifying countries most likely to contribute to filling gaps in digitized

  16. Effective potential at three loops

    Science.gov (United States)

    Martin, Stephen P.

    2017-11-01

    I present the effective potential at three-loop order for a general renormalizable theory, using the MS ¯ renormalization scheme and Landau gauge fixing. As applications and illustrative points of reference, the results are specialized to the supersymmetric Wess-Zumino model and to the standard model. In each case, renormalization group scale invariance provides a consistency check. In the Wess-Zumino model, the required vanishing of the minimum vacuum energy yields an additional check. For the standard model, I carry out the resummation of Goldstone boson contributions, which provides yet more opportunities for nontrivial checks, and obtain the minimization condition for the Higgs vacuum expectation value at full three-loop order. An infrared divergence due to doubled photon propagators appears in the three-loop standard model effective potential, but it does not affect the minimization condition or physical observables and can be eliminated by resummation.

  17. Classical Yang-Mills potentials

    Energy Technology Data Exchange (ETDEWEB)

    Mandula, J.E.

    1976-12-15

    Classical Coulomb-type configurations of Yang-Mills fields coupled to external sources (charges) are described and discussed. They are shown to be stable against small classical fluctuations in the fields if the Yang-Mills coupling is sufficiently small. In developing the stability analysis, massless charged scalar fields in the presence of a weak Coulomb potential are also shown to be stable to small field fluctuations. (AIP)

  18. ADVERGAMES: CHARACTERISTICS, LIMITATIONS AND POTENTIAL

    Directory of Open Access Journals (Sweden)

    Gurau Calin

    2010-07-01

    Full Text Available Advergames represent a new advertising concept that uses Internet technology to implement viral marketing campaigns. Despite the potential of this interactive advertising method, very few academic studies have been initiated to investigate the characteristics of advergames, and their influence on consumers’ perceptions and behaviour. Using secondary data, this paper attempts to evaluate the characteristics of effective advergames, and to analyse the effect of advergames on players’ perceptions and behaviour.

  19. Introduction: Translating Potential into Profits

    DEFF Research Database (Denmark)

    Lubinski, Christina; Kipping, Matthias

    2015-01-01

    Emerging markets trigger great expectations. Many foreign multinationals are eager to exploit the entrepreneurial opportunities potentially related to less developed but fast growing markets. This is not a new phenomenon. Multinationals from more developed countries have for long searched...... for opportunities in less developed markets and have dealt with the related challenges. Foreign environments with different needs and capabilities, unstable institutions and policies, stark fluctuations in the macroeconomic environment and unrealistic expectations are just some of the obstacles for ‘turning...

  20. Rotorcraft Icing - Progress and Potential.

    Science.gov (United States)

    1986-09-01

    from -71C to -21-C, and LWC from 0.21 g/m 3 to 0.3 g/m 3 . Tents conducted were terminated after four flights due to significant blade damage caused...its potential to asa:st in the certif!cation proceo : :u not clear at this time. To establish -he ultimate usefulness of a low-speed spray rig, it !s

  1. POTENTIAL OF CANOLA IN MICHIGAN

    OpenAIRE

    Adhikari, Bishwa B.

    1996-01-01

    This study consists of four different aspects of canola in Michigan with special emphasis on northern Michigan. The economic feasibility of canola as an alternative cash crop, potential canola growing area, feasibility of establishing canola processing plant(s) in northern Michigan and the canola marketing situation in Michigan were appraised. Secondary data, previous research results, key informant interviews, informal visits, expert opinions and survey data were used to study these aspects ...

  2. Streaming potential of superhydrophobic microchannels.

    Science.gov (United States)

    Park, Hung Mok; Kim, Damoa; Kim, Se Young

    2017-03-01

    For the purpose of gaining larger streaming potential, it has been suggested to employ superhydrophobic microchannels with a large velocity slip. There are two kinds of superhydrophobic surfaces, one having a smooth wall with a large Navier slip coefficient caused by the hydrophobicity of the wall material, and the other having a periodic array of no- shear slots of air pockets embedded in a nonslip wall. The electrokinetic flows over these two superhydrophobic surfaces are modelled using the Navier-Stokes equation and convection-diffusion equations of the ionic species. The Navier slip coefficient of the first kind surfaces and the no-shear slot ratio of the second kind surfaces are similar in the sense that the volumetric flow rate increases as these parameter values increase. However, although the streaming potential increases monotonically with respect to the Navier slip coefficient, it reaches a maximum and afterward decreases as the no-shear ratio increases. The results of the present investigation imply that the characterization of superhydrophobic surfaces employing only the measurement of volumetric flow rate against pressure drop is not appropriate and the fine structure of the superhydrophobic surfaces must be verified before predicting the streaming potential and electrokinetic flows accurately. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  3. Neuronal avalanches and coherence potentials

    Science.gov (United States)

    Plenz, D.

    2012-05-01

    The mammalian cortex consists of a vast network of weakly interacting excitable cells called neurons. Neurons must synchronize their activities in order to trigger activity in neighboring neurons. Moreover, interactions must be carefully regulated to remain weak (but not too weak) such that cascades of active neuronal groups avoid explosive growth yet allow for activity propagation over long-distances. Such a balance is robustly realized for neuronal avalanches, which are defined as cortical activity cascades that follow precise power laws. In experiments, scale-invariant neuronal avalanche dynamics have been observed during spontaneous cortical activity in isolated preparations in vitro as well as in the ongoing cortical activity of awake animals and in humans. Theory, models, and experiments suggest that neuronal avalanches are the signature of brain function near criticality at which the cortex optimally responds to inputs and maximizes its information capacity. Importantly, avalanche dynamics allow for the emergence of a subset of avalanches, the coherence potentials. They emerge when the synchronization of a local neuronal group exceeds a local threshold, at which the system spawns replicas of the local group activity at distant network sites. The functional importance of coherence potentials will be discussed in the context of propagating structures, such as gliders in balanced cellular automata. Gliders constitute local population dynamics that replicate in space after a finite number of generations and are thought to provide cellular automata with universal computation. Avalanches and coherence potentials are proposed to constitute a modern framework of cortical synchronization dynamics that underlies brain function.

  4. Biological Potential in Serpentinizing Systems

    Science.gov (United States)

    Hoehler, Tori M.

    2016-01-01

    Generation of the microbial substrate hydrogen during serpentinization, the aqueous alteration of ultramafic rocks, has focused interest on the potential of serpentinizing systems to support biological communities or even the origin of life. However the process also generates considerable alkalinity, a challenge to life, and both pH and hydrogen concentrations vary widely across natural systems as a result of different host rock and fluid composition and differing physical and hydrogeologic conditions. Biological potential is expected to vary in concert. We examined the impact of such variability on the bioenergetics of an example metabolism, methanogenesis, using a cell-scale reactive transport model to compare rates of metabolic energy generation as a function of physicochemical environment. Potential rates vary over more than 5 orders of magnitude, including bioenergetically non-viable conditions, across the range of naturally occurring conditions. In parallel, we assayed rates of hydrogen metabolism in wells associated with the actively serpentinizing Coast Range Ophiolite, which includes conditions more alkaline and considerably less reducing than is typical of serpentinizing systems. Hydrogen metabolism is observed at pH approaching 12 but, consistent with the model predictions, biological methanogenesis is not observed.

  5. Prodigiosin and its potential applications.

    Science.gov (United States)

    Darshan, N; Manonmani, H K

    2015-09-01

    Since a decade, there has been a strong consumer demand for more natural products. This has augmented inclination towards substitution of synthetic colorants with natural pigments. Natural pigments not only have the capacity to increase the marketability of products, they also demonstrate valuable biological activities as antioxidants and anticancer agents. There is a long history of exploitation of natural products produced by bacteria as sources of pharmaceutically important, bioactive compounds. Among natural pigments, pigments from microbial sources are potentially suitable alternatives to synthetic pigments. The red pigment prodigiosin (PG) has unusual properties, which have long been documented. The red-pigmented prodiginines are bioactive secondary metabolites produced by both Gram-negative and Gram-positive bacteria. Prodigiosins are characterized by a common pyrrolyl pyrromethene skeleton, and the biological role of these pigments in the producer organisms remains unclear. Bacterial prodigiosins and their synthetic derivatives are effective proapoptotic agents against various cancer cell lines, with multiple cellular targets including multi-drug resistant cells with little or no toxicity towards normal cell lines. However, research into the biology of pigment production will stimulate interest in the bioengineering of strains to synthesize useful prodiginine derivatives. This review article highlights the characteristics and potential applications of prodigiosin pigment from Serratia as prodigiosins are real potential therapeutic drugs.

  6. Optical Potential Field Mapping System

    Science.gov (United States)

    Reid, Max B. (Inventor)

    1996-01-01

    The present invention relates to an optical system for creating a potential field map of a bounded two dimensional region containing a goal location and an arbitrary number of obstacles. The potential field mapping system has an imaging device and a processor. Two image writing modes are used by the imaging device, electron deposition and electron depletion. Patterns written in electron deposition mode appear black and expand. Patterns written in electron depletion mode are sharp and appear white. The generated image represents a robot's workspace. The imaging device under processor control then writes a goal location in the work-space using the electron deposition mode. The black image of the goal expands in the workspace. The processor stores the generated images, and uses them to generate a feedback pattern. The feedback pattern is written in the workspace by the imaging device in the electron deposition mode to enhance the expansion of the original goal pattern. After the feedback pattern is written, an obstacle pattern is written by the imaging device in the electron depletion mode to represent the obstacles in the robot's workspace. The processor compares a stored image to a previously stored image to determine a change therebetween. When no change occurs, the processor averages the stored images to produce the potential field map.

  7. Bio-potential amplifier for potential gradient measurements

    Energy Technology Data Exchange (ETDEWEB)

    Bermudez, Andrea N; Spinelli, Enrique M; Muravchik, Carlos H [LEICI, Departamento de Electrotecnia, Universidad Nacional de La Plata, CC 91 (1900) La Plata (Argentina)

    2007-11-15

    This work proposes a bio-potential amplifier suitable for measurements from an electric potential gradient sensor, in electro-encephalography (EEG). The sensor is an array made by three electrodes placed on the vertices of an equilateral triangle of reduced size. Measuring the gradient requires small separation between electrodes hence, very low amplitude signals, of a few {mu}V, are obtained. Therefore, it is important to minimize amplifier noise and electromagnetic interference effects. In the proposed scheme, the first stage is a passive and balanced ac-coupling network adapted to the gradient configuration and the second stage is an 80 dB gain amplifier. The implementation requires a reduced number of components. Therefore, the circuit can be mounted just above the electrodes (active electrodes). The proposed amplifier was built and tested. It achieves a CMRR of 125dB at 50 Hz and an equivalent input noise voltage of 0,3{mu}V RMS in the band 0.5 - 500 Hz. Finally, some preliminary results in the detection of occipital alpha rhythm are presented.

  8. World potential of renewable energies

    Energy Technology Data Exchange (ETDEWEB)

    Dessus, B.; Devin, B.; Pharabod, F.

    1991-07-01

    A comprehensive analysis, region by region, of the actually accessible renewable energies at a given horizon, is presented. The same methodology as the one employed to derive ``proven fossil energy reserves`` from ``energy resources`` is adopted, in which resources are defined by quantitative information on physical potential, while reserves take into account technical and economical accessibility. As renewable resources are fluctuating with time and are diluted in space and not readily transportable or storeable, it is necessary to consider the presence of populations or activities near enough to be able to profit by these diluted and volatile energies.

  9. Nanothermodynamics: a subdivision potential approach

    Directory of Open Access Journals (Sweden)

    R. Moussavi

    2005-12-01

    Full Text Available  Classical thermodynamic laws and relations have been developed for macroscopic systems that satisfy the thermodynamic limit. These relations are challenged as the system size decreases to the scale of nano-systems, in which thermodynamic properties are overshadowed by system size, and the usual classical concepts of extensivity and intensivity are no longer valid. The challenges to the classical thermodynamics in relation to small systems are demonstrated, and via the approach introduced by Hill, the concept of sub-division potential is clarified in details. The fundamental thermodynamic relations are obtained using a rational-based method.

  10. Feedback traps for virtual potentials

    Science.gov (United States)

    Gavrilov, Momčilo; Bechhoefer, John

    2017-03-01

    Feedback traps are tools for trapping and manipulating single charged objects, such as molecules in solution. An alternative to optical tweezers and other single-molecule techniques, they use feedback to counteract the Brownian motion of a molecule of interest. The trap first acquires information about a molecule's position and then applies an electric feedback force to move the molecule. Since electric forces are stronger than optical forces at small scales, feedback traps are the best way to trap single molecules without `touching' them (e.g. by putting them in a small box or attaching them to a tether). Feedback traps can do more than trap molecules: they can also subject a target object to forces that are calculated to be the gradient of a desired potential function U(x). If the feedback loop is fast enough, it creates a virtual potential whose dynamics will be very close to those of a particle in an actual potential U(x). But because the dynamics are entirely a result of the feedback loop-absent the feedback, there is only an object diffusing in a fluid-we are free to specify and then manipulate in time an arbitrary potential U(x,t). Here, we review recent applications of feedback traps to studies on the fundamental connections between information and thermodynamics, a topic where feedback plays an even more fundamental role. We discuss how recursive maximum-likelihood techniques allow continuous calibration, to compensate for drifts in experiments that last for days. We consider ways to estimate work and heat, using them to measure fluctuating energies to a precision of ±0.03 kT over these long experiments. Finally, we compare work and heat measurements of the costs of information erasure, the Landauer limit of kT ln 2 per bit of information erased. We argue that, when you want to know the average heat transferred to a bath in a long protocol, you should measure instead the average work and then infer the heat using the first law of thermodynamics. This

  11. Unleashing the Potential of SCM

    DEFF Research Database (Denmark)

    Møller, Charles

    2005-01-01

    technology; (iii) ERP adoption has matured; and (iv) ERP adoption is converging towards a dominant design. Finally, the paper discusses the general implications of the surveyed state of practice on the SCM research challenges. Consequently we argue that research needs to adjust its conceptions of the ERP......This paper argues that with the present state of Enterprise Resource Planning (ERP) adoption by the companies, the potential benefits of Supply Chain Management (SCM) and integration is about to be unleashed. This paper presents the results and the implications of a survey on ERP adoption...... concept towards ERP II in order to accommodate to the emerging practices....

  12. Recreational potential of Kiev region

    Directory of Open Access Journals (Sweden)

    A. Poltavets

    2015-10-01

    Full Text Available It analyzes the recreational potential of the territory of the Kiev region, which focuses on all types of land on the main intended purpose. The most favorable conditions for recreation are formed on the lands of recreation, recreation, historical and cultural, natural reserve fund and other environmental protection, forestry purposes, and water resources. The area of land corresponding categories are significantly (3‐5 times inferior standards adopted in the European Union. The main directions of development of recreational land use for the future are determined.

  13. Towards a commercially potential process

    DEFF Research Database (Denmark)

    Panpipat, Worawan; Xu, Xuebing; Guo, Zheng

    2012-01-01

    In order to examine the industrial potential to indirectly isolate phytosterols from deodoriser distillates (DODs), enzymatic transesterification of an industrial rapeseed and soybean oil DOD mixture with bioethanol was investigated using commercial lipases and a few newly immobilised preparations...... esters from DODs. The optimum conditions are 10% enzyme load (wt% of DODs), ethanol/DODs of 3.0:1.0 (mol/mol), water content 0.125% (based on the weight of total mixture), and reaction at 30 °C for 5 h. The results demonstrated that >95% sterols can be recovered as free form (>85% sterol esters were...

  14. Analgesic Potential of Essential Oils

    Directory of Open Access Journals (Sweden)

    José Ferreira Sarmento-Neto

    2015-12-01

    Full Text Available Pain is an unpleasant sensation associated with a wide range of injuries and diseases, and affects approximately 20% of adults in the world. The discovery of new and more effective drugs that can relieve pain is an important research goal in both the pharmaceutical industry and academia. This review describes studies involving antinociceptive activity of essential oils from 31 plant species. Botanical aspects of aromatic plants, mechanisms of action in pain models and chemical composition profiles of the essential oils are discussed. The data obtained in these studies demonstrate the analgesic potential of this group of natural products for therapeutic purposes.

  15. The Ergogenic Potential of Arginine

    Directory of Open Access Journals (Sweden)

    La Bounty Paul M

    2004-12-01

    Full Text Available Abstract Arginine is a conditionally essential amino acid that is involved in protein synthesis, the detoxification of ammonia, and its conversion to glucose as well as being catabolized to produce energy. In addition to these physiological functions, arginine has been purported to have ergogenic potential. Athletes have taken arginine for three main reasons: 1 its role in the secretion of endogenous growth hormone; 2 its involvement in the synthesis of creatine; 3 its role in augmenting nitric oxide. These aspects of arginine supplementation will be discussed as well as a review of clinical investigations involving exercise performance and arginine ingestion.

  16. "Human potential" and progressive pedagogy

    DEFF Research Database (Denmark)

    Øland, Trine

    2012-01-01

    This article examines the cultural constructs of progressive pedagogy in Danish school pedagogy and its emerging focus on the child’s human potential from the 1920s to the 1950s. It draws on Foucault’s notion of ‘dispositifs’ and the ‘elements of history’, encircling a complex transformation...... of continuity and discontinuity of progressive pedagogy. The Danish context is identified as being part of an international and scientific enlightenment movement circulating in, e.g., the New Education Fellowship (NEF). The cultural constructs embedded in progressivism are clarified in the article...

  17. Ethnography: principles, practice and potential.

    Science.gov (United States)

    Draper, Jan

    2015-05-06

    Ethnography is a methodology that is gaining popularity in nursing and healthcare research. It is concerned with studying people in their cultural context and how their behaviour, either as individuals or as part of a group, is influenced by this cultural context. Ethnography is a form of social research and has much in common with other forms of qualitative enquiry. While classical ethnography was characteristically concerned with describing 'other' cultures, contemporary ethnography has focused on settings nearer to home. This article outlines some of the underlying principles and practice of ethnography, and its potential for nursing and healthcare practice.

  18. Potential risks in radiology departments

    Energy Technology Data Exchange (ETDEWEB)

    Hernanz-Schulman, Marta [Vanderbilt University Medical Center, Department of Radiology and Radiological Sciences, Monroe Carell Jr. Children' s Hospital at Vanderbilt, Nashville, TN (United States)

    2008-11-15

    Pediatric patients in the Emergency Department (ED) often need diagnostic imaging examinations. These range from radiographs to fluoroscopic procedures to CT and MRI. Each of these examinations requires transportation and hand-offs (transfer of patient to different health care workers), and each carries inherent risks of the procedure itself. The following material will examine a variety of common situations that involve interaction between patients from the ED and the radiology department and describe potential risks and methods through which these risks can be minimized. (orig.)

  19. Calculation of Rydberg interaction potentials

    Science.gov (United States)

    Weber, Sebastian; Tresp, Christoph; Menke, Henri; Urvoy, Alban; Firstenberg, Ofer; Büchler, Hans Peter; Hofferberth, Sebastian

    2017-07-01

    The strong interaction between individual Rydberg atoms provides a powerful tool exploited in an ever-growing range of applications in quantum information science, quantum simulation and ultracold chemistry. One hallmark of the Rydberg interaction is that both its strength and angular dependence can be fine-tuned with great flexibility by choosing appropriate Rydberg states and applying external electric and magnetic fields. More and more experiments are probing this interaction at short atomic distances or with such high precision that perturbative calculations as well as restrictions to the leading dipole-dipole interaction term are no longer sufficient. In this tutorial, we review all relevant aspects of the full calculation of Rydberg interaction potentials. We discuss the derivation of the interaction Hamiltonian from the electrostatic multipole expansion, numerical and analytical methods for calculating the required electric multipole moments and the inclusion of electromagnetic fields with arbitrary direction. We focus specifically on symmetry arguments and selection rules, which greatly reduce the size of the Hamiltonian matrix, enabling the direct diagonalization of the Hamiltonian up to higher multipole orders on a desktop computer. Finally, we present example calculations showing the relevance of the full interaction calculation to current experiments. Our software for calculating Rydberg potentials including all features discussed in this tutorial is available as open source.

  20. Immunotherapeutic potential of extracellular vesicles

    Directory of Open Access Journals (Sweden)

    Bin eZhang

    2014-10-01

    Full Text Available Extracellular vesicles or EVs is a term that encompasses all classes of secreted lipid membrane vesicles. Despite being scientific novelties, EVs are gaining importance as a mediator of important physiological and pathological intercellular activities possibly through the transfer of their cargo of protein and RNA between cells. In particular, exosomes the currently best characterized EVs have been notable for their in vitro and in vivo immunomodulatory activities. Exosomes are nanometer-sized endosome-derived vesicles secreted by many cell types and their immunomodulatory potential is independent of their cell source. Besides immune cells such as dendritic cells, macrophages and T cells, cancer and stem cells also secrete immunologically active exosomes that could influence both physiological and pathological processes. The immunological activities of exosomes affect both innate and adaptive immunity and include antigen presentation, T cell activation, T cell polarisation to Tregs, immune suppression and anti-inflammation. As such, exosomes carry much immunotherapeutic potential as a therapeutic agent and a therapeutic target.

  1. Ocular Vestibular Evoked Myogenic Potentials

    Directory of Open Access Journals (Sweden)

    Felipe, Lilian

    2014-01-01

    Full Text Available Introduction Diagnostic testing of the vestibular system is an essential component of treating patients with balance dysfunction. Until recently, testing methods primarily evaluated the integrity of the horizontal semicircular canal, which is only a portion of the vestibular system. Recent advances in technology have afforded clinicians the ability to assess otolith function through vestibular evoked myogenic potential (VEMP testing. VEMP testing from the inferior extraocular muscles of the eye has been the subject of interest of recent research. Objective To summarize recent developments in ocular VEMP testing. Results Recent studies suggest that the ocular VEMP is produced by otolith afferents in the superior division of the vestibular nerve. The ocular VEMP is a short latency potential, composed of extraocular myogenic responses activated by sound stimulation and registered by surface electromyography via ipsilateral otolithic and contralateral extraocular muscle activation. The inferior oblique muscle is the most superficial of the six extraocular muscles responsible for eye movement. Therefore, measurement of ocular VEMPs can be performed easily by using surface electrodes on the skin below the eyes contralateral to the stimulated side. Conclusion This new variation of the VEMP procedure may supplement conventional testing in difficult to test populations. It may also be possible to use this technique to evaluate previously inaccessible information on the vestibular system.

  2. Virtual materiality, potentiality and subjctivity

    DEFF Research Database (Denmark)

    Søndergaard, Dorte Marie

    2013-01-01

    How do we conceptualize virtual materiality, in terms of for instance avatars and weapons in computer games, virtual discourse and subjectivity as phenomena intra-acting with real life materiality, discourse and subjectivity in children’s everyday lives? How do we understand the intra-activity of......How do we conceptualize virtual materiality, in terms of for instance avatars and weapons in computer games, virtual discourse and subjectivity as phenomena intra-acting with real life materiality, discourse and subjectivity in children’s everyday lives? How do we understand the intra......-activity of such elements in children’s night dreams? These are some of the questions discussed in this text. I bring together Karen Barad’s agential realism and Giorgi Agamben’s concept of potentiality to enable and refine an analytical approach to real-virtual enactments, thereby questioning the potentialities of gaming......, of movies and of dreams as they enter intra-activities in the comprehensive set of apparatuses that enact child agency, subjectivity and relational practices. The analyses and conceptual refinements are based on empirical cases involving interviews with and observations among 8-14 year old children....

  3. The effective crystal field potential

    CERN Document Server

    Mulak, J

    2000-01-01

    As it results from the very nature of things, the spherical symmetry of the surrounding of a site in a crystal lattice or an atom in a molecule can never occur. Therefore, the eigenfunctions and eigenvalues of any bound ion or atom have to differ from those of spherically symmetric respective free ions. In this way, the most simplified concept of the crystal field effect or ligand field effect in the case of individual molecules can be introduced. The conventional notion of the crystal field potential is narrowed to its non-spherical part only through ignoring the dominating spherical part which produces only a uniform energy shift of gravity centres of the free ion terms. It is well understood that the non-spherical part of the effective potential "seen" by open-shell electrons localized on a metal ion plays an essential role in most observed properties. Light adsorption, electron paramagnetic resonance, inelastic neutron scattering and basic characteristics derived from magnetic and thermal measurements, ar...

  4. HARNESSING INNOVATION POTENTIAL OF CROWDSOURCING

    Directory of Open Access Journals (Sweden)

    Slavica ROCHESKA

    2014-05-01

    Full Text Available The new innovation paradigm is based upon articulation of external and internal sources of innovation. Nowadays, crowdsourcing is coming up as significant external source in innovation processes of the companies. Crowdsourcing enables harnessing of initiatives, ideas, solutions and knowledge of the crowd so as to enhance innovation performance and induce a value creation. Given that existing innovation literature does not cover sufficiently the issues related to crowdsourcing this paper is to offer an additional views about innovation potentials of crowdsourcing thus contributing for future research on this relatively unexplored concept. Therefore, this paper aims at considering key insights about crowdsourcing contribution on developing companies’ innovation capacity. More specifically it is focused on identification of benefits, weaknesses and risks arising from crowdsourcing to the innovation process comprising conceptual and empirical aspects.

  5. Innovative potential of plasma technology

    Science.gov (United States)

    Budaev, V. P.

    2017-11-01

    The review summarizes recent experimental observations of materials exposed to extreme hot plasma loads in fusion devices and plasma facilities with high-temperature plasma. Plasma load on the material in such devices lead to the stochastic clustering and fractal growth of the surface on scales from tens of nanometers to hundreds of micrometers forming statistical self-similarity of the surface roughness with extremely high specific area. Statistical characteristics of hierarchical granularity and scale invariance of such materials surface qualitatively differ from the properties of the roughness of the ordinary Brownian surface which provides a potential of innovative plasma technologies for synthesis of new nanostructured materials with programmed roughness properties, for hypersonic technologies, for biotechnology and biomedical applications.

  6. Solar potential inventory and modeling

    Science.gov (United States)

    Angelici, G. L.; Bryant, N. A.

    1979-01-01

    Image processing procedures for calculating the energy that roof-mounted solar collectors can potentially supply in a metropolitan area are presented. Satellite multispectral imagery from which land cover types can be determined digitally was sampled in order to estimate the percentage of land area occupied by flat or south-facing roof tops in residential and commercial/industrial areas. Procedures were applied to the various power subdistricts of the western San Fernando valley of California, and it was found that on the average 120% of the existing power demand could be met if only half the useable rooftop area were utilized, amounting to 385 MW of peak power and indicating the applicability of solar cells to power generation in urban areas.

  7. Scalar Potential Model of light

    Science.gov (United States)

    Hodge, John

    2008-04-01

    Some observations of light are inconsistent with a wave--like model. Other observations of light are inconsistent with a particle--like model. A model of light is proposed wherein Newton's and Democritus's speculations are combined with the cosmological scalar potential model (SPM). The SPM was tested by confrontation with observations of galaxy HI rotation curves (RCs), asymmetric RCs, redshift, discrete redshift, galaxy central mass, and central velocity dispersion; and with observations of the Pioneer Anomaly. The resulting model of light will be tested by numerical simulation of a photon behaving in a wave-like manner such as diffusion, interference, reflection, spectrography, and the Afshar experiment. Although the SPM light model requires more work, early results are beginning to emerge that suggest possible tests because a few predictions are inconsistent with both the current particle and wave models of light and that suggest a re-interpretation of the equations of quantum mechanics.

  8. Sustainability Potentials of Housing Refurbishment

    Directory of Open Access Journals (Sweden)

    Behzad Sodagar

    2013-03-01

    Full Text Available The benefits of choosing refurbishment over new build have recently been brought into focus for reducing environmental impacts of buildings. This is due to the fact that the existing buildings will comprise the majority of the total building stocks for years to come and hence will remain responsible for the majority of greenhouse gas emissions from the sector. This paper investigates the total potentials of sustainable refurbishment and conversion of the existing buildings by adopting a holistic approach to sustainability. Life Cycle Assessment (LCA and questionnaires have been used to analyse the environmental impact savings (Co2e, improved health and well-being, and satisfaction of people living in refurbished homes. The results reported in the paper are based on a two year externally funded research project completed in January 2013.

  9. Status of effective potential calculations

    CERN Document Server

    Quiros, M.

    1995-01-01

    We review various effective potential methods which have been useful to compute the Higgs mass spectrum and couplings of the minimal supersymmetric standard model. We compare results where all-loop next-to-leading-log corrections are resummed by the renormalization group, with those where just the leading-log corrections are kept. Pole masses are obtained from running masses by addition of convenient self-energy diagrams. Approximate analytical expressions are worked out, providing an excellent approximation to the numerical results which include all next-to-leading-log terms. An appropriate treatment of squark decoupling allows to consider large values of the stop and/or sbottom mixing parameters and thus fix a reliable upper bound on the mass of the lightest CP-even Higgs boson mass.

  10. Antidiabetic potential of Conocarpus lancifolius

    Directory of Open Access Journals (Sweden)

    Malik Saadullah

    2014-06-01

    Full Text Available The antidiabetic activity of Conocarpus lancifolius extract was investigated in vitro, as alpha glucosidase inhibition and in vivo as alloxan induced diabetic rabbits with other biochemical parameters (LDL, HDL, SGPT, SGOT, cretinine, urea and triglyceride. Alpha-glucosidase inhibition activity was performed by using acorbose as standred. Methanolic extract show alpha-glucosidase inhibition activity. The dose of 200 mg/kg body weight significantly (p<0.05 decreases the blood glucose level, plasma total cholesterol, triglycerides and LDL in treated rabbits as compared to diabetic rabbits. This dose significantly increased the level of HDL in treated group. The activity of SGOT and SGPT also significantly (p<0.05 decreased in treated diabetic rabbits. Phytochemical studies show the presence of glycosides, tannins, saponins and terpenoids. The antidiabetic potential is may be due to its saponin contents.

  11. Potentialities of Revised Quantum Electrodynamics

    Directory of Open Access Journals (Sweden)

    Lehnert B.

    2013-10-01

    Full Text Available The potentialities of a revised quantum electrodynamic theory (RQED earlier established by the author are reconsidered, also in respect to other fundamental theories such as those by Dirac and Higgs. The RQED theory is characterized by intrinsic linear symmetry breaking due to a nonzero divergence of the electric field strength in the vacuum state, as supported by the Zero Point Energy and the experimentally confirmed Casimir force. It includes the results of electron spin and antimatter by Dirac, as well as the rest mass of elementary particles predicted by Higgs in terms of spontaneous nonlinear symmetry breaking. It will here be put into doubt whether the approach by Higgs is the only theory which becomes necessary for explaining the particle rest masses. In addition, RQED theory leads to new results beyond those being available from the theories by Dirac, Higgs and the Standard Model, such as in applications to leptons and the photon.

  12. extracts as potential dietary supplements

    Directory of Open Access Journals (Sweden)

    Paulina Strugała

    2014-08-01

    Full Text Available Introduction: In times of worsening civilization diseases the interest in natural healing substances is on the increase. To reduce unwanted side effects of many synthetic drugs, it is reasonable to introduce to the daily diet foods rich in natural compounds of plant origin that are beneficial for health. The purpose of the study was to determine the biological activity and stability of selected ethanol extracts of the fruit of chokeberry, blackcurrant, hawthorn, rosehip, quince and Japanese quince as potential nutraceuticals.Materials and methods: Antioxidant activity of the extracts was determined in relation to model phospholipid membranes (IC50 PC. Antiradical activity was determined in a test with the DPPH• radical (IC50 DPPH. Also the inhibition of enzymatic (1-LOX oxidation of linoleic acid was determined at the beginning of the period of storage of the extracts at room temperature and after 12 months. Results: After 12 months of storage the highest antioxidant stability was shown by blackcurrant extract (1.5% increase in IC50 PC, the highest antiradical stability by quince extract (1.0% reduction in IC50 DPPH, and the highest stability of 1-LOX enzyme inhibition by chokeberry extract (6.3% reduction in inhibition at a concentration of 8 μg∙ml-1. Japanese quince extract showed the strongest regenerating properties with respect to oxidized phospholipid membranes and the highest ability to eliminate the free radical DPPH•. Conclusion: It can be concluded that the ethanol extracts of the fruits (in particular blackcurrant, chokeberry and Japanese quince are a potential source of dietary supplements of expected effectiveness in preventive treatment.

  13. 50 CFR 226.218 - Critical habitat for the U.S. DPS of smalltooth sawfish (Pristis pectinata).

    Science.gov (United States)

    2010-10-01

    ... eastern extent at the mouth of Shell Creek at 81°59.467′ W, and the northern extent of the Charlotte... Boulevard) to Orange River Boulevard, then by Orange River Boulevard to Buckingham Road, then by Buckingham...

  14. The potential of renewable energy

    Energy Technology Data Exchange (ETDEWEB)

    1990-03-01

    On June 27 and 28, 1989, the US Department of Energy (DOE) national laboratories were convened to discuss plans for the development of a National Energy Strategy (NES) and, in particular, the analytic needs in support of NES that could be addressed by the laboratories. As a result of that meeting, interlaboratory teams were formed to produce analytic white papers on key topics, and a lead laboratory was designated for each core laboratory team. The broad-ranging renewables assignment is summarized by the following issue statement from the Office of Policy, Planning and Analysis: to what extent can renewable energy technologies contribute to diversifying sources of energy supply What are the major barriers to greater renewable energy use and what is the potential timing of widespread commercialization for various categories of applications This report presents the results of the intensive activity initiated by the June 1989 meeting to produce a white paper on renewable energy. Scores of scientists, analysts, and engineers in the five core laboratories gave generously of their time over the past eight months to produce this document. Their generous, constructive efforts are hereby gratefully acknowledged. 126 refs., 44 figs., 32 tabs.

  15. Can nanotechnology potentiate photodynamic therapy?

    Science.gov (United States)

    Huang, Ying-Ying; Sharma, Sulbha K; Dai, Tianhong; Chung, Hoon; Yaroslavsky, Anastasia; Garcia-Diaz, Maria; Chang, Julie; Chiang, Long Y; Hamblin, Michael R

    2012-03-01

    Photodynamic therapy (PDT) uses the combination of non-toxic dyes and harmless visible light to produce reactive oxygen species that can kill cancer cells and infectious microorganisms. Due to the tendency of most photosensitizers (PS) to be poorly soluble and to form nonphotoactive aggregates, drug-delivery vehicles have become of high importance. The nanotechnology revolution has provided many examples of nanoscale drug-delivery platforms that have been applied to PDT. These include liposomes, lipoplexes, nanoemulsions, micelles, polymer nanoparticles (degradable and nondegradable), and silica nanoparticles. In some cases (fullerenes and quantum dots), the actual nanoparticle itself is the PS. Targeting ligands such as antibodies and peptides can be used to increase specificity. Gold and silver nanoparticles can provide plasmonic enhancement of PDT. Two-photon excitation or optical upconversion can be used instead of one-photon excitation to increase tissue penetration at longer wavelengths. Finally, after sections on in vivo studies and nanotoxicology, we attempt to answer the title question, "can nano-technology potentiate PDT?"

  16. Biological Potential of Extraterrestrial Materials

    Science.gov (United States)

    Mautner, Michael N.; Conner, Anthony J.; Killham, Kenneth; Deamer, David W.

    1997-09-01

    Meteoritic materials are investigated as potential early planetary nutrients. Aqueous extracts of the Murchison C2 carbonaceous meteorite are utilized as a sole carbon source by microorganisms, as demonstrated by the genetically modifiedPseudomonas fluorescenceequipped with theluxgene. Nutrient effects are observed also with the soil microorganismsNocardia asteroidesandArthrobacter pascensthat reach populations up to 5 × 107CFU/ml in meteorite extracts, similar to populations in terrestrial soil extracts. Plant tissue cultures ofAsparagus officinalisandSolanum tuberosum(potato) exhibit enhanced pigmentation and some enhanced growth when meteorite extracts are added to partial nutrient media, but inhibited growth when added to full nutrient solution. The meteorite extracts lead to large increases in S, Ca, Mg, and Fe plant tissue contents as shown by X-ray fluorescence, while P, K, and Cl contents show mixed effects. In both microbiological and plant tissue experiments, the nutrient and inhibitory effects appear to be best balanced for growth at about 1:20 (extracted solid:H2O) ratios. The results suggest that solutions in cavities in meteorites can provide efficient concentrated biogenic and early nutrient environments, including high phosphate levels, which may be the limiting nutrient. The results also suggest that carbonaceous asteroid resources can sustain soil microbial activity and provide essential macronutrients for future space-based eco- systems.

  17. The Analgesic Potential of Cannabinoids

    Science.gov (United States)

    Elikottil, Jaseena; Gupta, Pankaj; Gupta, Kalpna

    2013-01-01

    Historically and anecdotally cannabinoids have been used as analgesic agents. In recent years, there has been an escalating interest in developing cannabis-derived medications to treat severe pain. This review provides an overview of the history of cannabis use in medicine, cannabinoid signaling pathways, and current data from preclinical as well as clinical studies on using cannabinoids as potential analgesic agents. Clinical and experimental studies show that cannabis-derived compounds act as anti-emetic, appetite modulating and analgesic agents. However, the efficacy of individual products is variable and dependent upon the route of administration. Since opioids are the only therapy for severe pain, analgesic ability of cannabinoids may provide a much-needed alternative to opioids. Moreover, cannabinoids act synergistically with opioids and act as opioid sparing agents, allowing lower doses and fewer side effects from chronic opioid therapy. Thus, rational use of cannabis based medications deserves serious consideration to alleviate the suffering of patients due to severe pain. PMID:20073408

  18. Biological potential of Stillingia oppositifolia

    Directory of Open Access Journals (Sweden)

    Betania Barros Cota

    2011-02-01

    Full Text Available Organic extracts from leaves and stems of Stillingia oppositifolia Baill. ex Müll. Arg., Euphorbiaceae, were screened for antifungal and cytotoxic properties. The extracts presented Minimum Inhibitory Concentration values around 250 µg.mL-1 against Candida krusei and Candida tropicalis, and around 63 µg.mL-1 for Paracoccidioides brasiliensis. They were tested on three human cell lines (UACC-62, MCF-7, and TK-10, disclosing GI50 values, (concentration able to inhibit 50% of the cell growth ranging from 50 to 100 µg.mL-1. Organic extract from stems furnished hexanic, dichloromethanic and aqueous phases after partition. Chromatographic fractionation of the hexanic soluble phase of the stems yielded aleuritolic acid 3-acetate, β-sitosterol, 3-epi-β-amyrin, β-amyrone and palmitic acid. These compounds showed antifungal and cytotoxic activities in the same range as the organic crude extract and low toxic effect against mononuclear cells obtained from human peripheral blood. This is the first report on chemical and biological potential of S. oppositifolia.

  19. Conotoxins: Therapeutic Potential and Application

    Directory of Open Access Journals (Sweden)

    Richard T. Layer

    2006-04-01

    Full Text Available The pharmacological variety of conotoxins, diverse peptides found in the venoms of marine cone snails, is well recognized. Venoms from each of the estimated 500 species of cone snails contain 50 to 200 distinct biologically active peptides. Most conotoxins characterized to date target receptors and ion channels of excitable tissues, such as ligandgated nicotinic acetylcholine, N-methyl-D-aspartate, and type 3 serotonin receptors, as well as voltage-gated calcium, sodium, and potassium channels, and G-protein-coupled receptors including α-adrenergic, neurotensin, and vasopressin receptors, and the norepinephrine transporter. Several conotoxins have shown promise in preclinical models of pain, convulsive disorders, stroke, neuromuscular block, and cardioprotection. The pharmacological selectivity of the conotoxins, coupled with the safety and efficacy demonstrated in preclinical models, has led to their investigation as human therapeutic agents. In the following review, we will survey the pharmacology and therapeutic rationale of those conotoxins with potential clinical application, and discuss the unique challenges that each will face in the course of their transition from venom component to human therapeutic.

  20. Classification of geothermal resources by potential

    OpenAIRE

    Rybach, L.

    2015-01-01

    When considering and reporting resources, the term "geothermal potential" is often used without clearly stating what kind of potential is meant. For renewable energy resources it is nowadays common to use different potentials: theoretical, technical, economic, sustainable, developable – decreasing successively in size. In such a sequence, the potentials are progressively realizable and more and more rewarding financially. The theoretical potential describes the physically pr...

  1. Beautiful, but also potentially invasive

    Directory of Open Access Journals (Sweden)

    Lipták Boris

    2015-03-01

    Full Text Available Introduction of non-indigenous exotic species to new areas, where they may establish viable populations and become invasive, is a considerable problem in the protection of nature worldwide, as these species may alter the indigenous species population structure and potentially even decrease the biodiversity. The European fauna underwent through major negative changes on the continent and nowadays, it experiences another new treat, represented by the expanding aquarium pet trade, and with it, associated species (and disease introductions. Exotic freshwater crustaceans are one of the taxa widely incorporated in the business, counting a remarkable number of species. Recent records of the exotic marbled crayfish or Marmorkrebs (Procambarus fallax f. virginalis in German in open ecosystems in Slovakia pointed to human-mediated introductions associated with aquarium pet trade in the country. In this regard, a study of the aquarium pet trade both in expositions and shops and online was assessed. Several crustacean taxa are available both in pet trade exhibitions and online through the Internet. Altogether 26 different species were identified in the aquarium trade in Slovakia. These are Procambarus fallax f. virginalis, P. clarkii, P. alleni, Cherax quadricarinatus, C. destructor, C. holthuisi, C. peknyi, Cambarellus patzcuarensis and C. diminutus occurring in the aquarium pet trade in Slovakia (n = 9. Procambarus fallax f. virginalis, P. clarkii and C. patzuarensis are the most common in this regard. There is also a quantity of other related taxa in the aquarium pet trade in Slovakia, mainly Caridina spp. (n = 5, Neocaridina spp. (n = 4, Atyopsis moluccensis, Atya gabonensis, Arachnochium kulsiense and several taxa of exotic crabs (n = 5 belonging to three different genera (Cardiosoma, Geosesarma and Gecarinus present. Neocaridina davidi is identified as the most frequent in this regard. As some of the species can become established and form viable

  2. Integrative Potential of Architectural Activities

    Science.gov (United States)

    Davydova, O. V.

    2017-11-01

    The architectural activity integrative potential is considered through the combination as well as the organization of necessary universal human and professional, artificial and natural, social and individual architectural activities in the multidimensional unity of its components reflecting and influencing the public thinking with the artistic-figurative language of international communication using experimental form-building, interactive presentations, theatrical and gaming expressiveness to organize an easier contact with the consumer, methods of design and advertising. The methodology is used to reflect the mutual influence of personal and social problems through globalization and identification of their problem in the public, to study the existing methods of the problem solving, to analyze their effectiveness, to search for actual problems and new solutions to them using the latest achievements of technological progress, artistic patterns, creation of a holistic architectural image reflecting the author’s worldview in the general picture of the modern world with its inherent tendencies “Surah” and “entertainment”. The operative communication means in the chain of social experience are developed - the teacher - the trainee - the new educational result used to transmit the updated information in a generalized form, the current and final control through the use of feedback sheets, supporting summaries, info cards, its decisions. The paper considers the study time efficiency due to the organization of the research activity which allows students to obtain a theoretical generalized information (the creator’s limitation) in the process of filling or compiling informative and diagnostic maps that provide the theoretical framework for the creative activity through gaming activity that turns into a work activity which has a diagnosed result.

  3. Potential wine ageing during transportation

    Directory of Open Access Journals (Sweden)

    Jung Rainer

    2014-01-01

    Full Text Available In a global world, wineries have to satisfy the demand of consumers who wish to drink high quality wines from countries all over the world. To fulfill this request wines have to be transported, crossing thereby great distances from the place of production to the consumer country. At the Institute of Enology of Hochschule Geisenheim University examinations with White-, Rosé- and Red-Wines of different origins which had been transported over longer distances within Europe (Portugal, France, Italy to Germany by trucks were carried out. Shipping of wines was simulated in a climatized cabinet to analyze the influence on wine quality during this way and conditions of transportation. Time and temperature profiles were based on real transport situtations which were recorded during shipping from Germany to Japan using data loggers. White, Rosé and Red wines were transported during 6 to 8 weeks and then were analytically and sensorically compared to those which were stored at a constant temperature of 15 ∘C. Besides the effect of temperature, the movements and vibrations encountered by the wines were also examined. Analytically wines were analyzed for general analytical parameters with Fourier-Transformation-Infrared-Spectroscopie (FTIR, Colour differences (Spectralphotometrie and free and total sulfuric acid with Flow-Injection-Analysis (FIA. Sensory examinations with a trained panel were performed in difference tests in form of rankings and triangular tests. Summarizing the results from the different tests it could be found that transportation had an influence on the potential ageing of wines depending on the wine matrix. Especially high and varying temperatures during transportations over a longer distance and time had negative influences on wine quality. Also the movement of wine at higher temperatures had showed a negative effect whereas transport at cool temperatures even below 0 ∘C did not influence wine characteristics. Sophisticated

  4. Green roofs: potential at LANL

    Energy Technology Data Exchange (ETDEWEB)

    Pacheco, Elena M [Los Alamos National Laboratory

    2009-01-01

    strokes, heat exhaustion, and pollution that can agitate the respiratory system. The most significant savings associated with green roofs is in the reduction of cooling demands due to the green roof's thermal mass and their insulating properties. Unlike a conventional roof system, a green roof does not absorb solar radiation and transfer that heat into the interior of a building. Instead the vegetation acts as a shade barrier and stabilizes the roof temperature so that interior temperatures remain comfortable for the occupants. Consequently there is less of a demand for air conditioning, and thus less money spent on energy. At LANL the potential of green roof systems has already been realized with the construction of the accessible green roof on the Otowi building. To further explore the possibilities and prospective benefits of green roofs though, the initial capital costs must be invested. Three buildings, TA-03-1698, TA-03-0502, and TA-53-0031 have all been identified as sound candidates for a green roof retrofit project. It is recommended that LANL proceed with further analysis of these projects and implementation of the green roofs. Furthermore, it is recommended that an urban forestry program be initiated to provide supplemental support to the environmental goals of green roofs. The obstacles barring green roof construction are most often budgetary and structural concerns. Given proper resources, however, the engineers and design professionals at LANL would surely succeed in the proper implementation of green roof systems so as to optimize their ecological and monetary benefits for the entire organization.

  5. Dual Eligibles and Potentially Avoidable Hospitalizations

    Data.gov (United States)

    U.S. Department of Health & Human Services — About 25 percent of the hospitalizations for dual eligible beneficiaries in 2005 were potentially avoidable. Medicare and Medicaid spending for those potentially...

  6. A black potential for spin less particles

    Energy Technology Data Exchange (ETDEWEB)

    Ghatak, Ananya, E-mail: gananya04@gmail.com [Department of Physics, Banaras Hindu University, Varanasi 221005 (India); Hasan, Mohammad, E-mail: mohammadhasan786@gmail.com [ISRO Satellite Centre (ISAC), Bangalore 560017 (India); Mandal, Bhabani Prasad, E-mail: bhabani@bhu.ac.in [Department of Physics, Banaras Hindu University, Varanasi 221005 (India)

    2015-07-03

    We consider the most general non-Hermitian Hulthen potential to study the scattering of spin-less relativistic particles. The conditions for CC, SS and CPA are obtained analytically for this potential. We show that almost total absorption occurs for entire range of incidence energy for certain parameter ranges of the potential and hence term this as ‘black potential’. Time reversed of the same potential shows perfect emission for the entire range of particle energy. We also present the classical analog of this potential in terms of waveguide cross section. - Highlights: • Relativistic scattering properties of a spin zero particle due to most general non-Hermitian Hulthen potential are discussed. • Analytical conditions for CC, CPA and SS are obtained. • Broadband CPA is obtained for entire range of incidence energy. • Non-Hermitian Hulthen potential is parametrized in such a way to show broadband CPA and/or CC. • Waveguide analog of such potential is presented.

  7. The Potential of Modern Russian Generations

    OpenAIRE

    Valentina Grigor’evna Dobrokhleb; Nataliya Viktorovna Zvereva

    2016-01-01

    The paper considers the necessity of socio-demographic approach to assessing the potential of modern generations. The demographic potential of generations is determined by their number, their share in total population, and their life expectancy. Their economic potential is determined by the proportion of representatives of different generations in total employment. Their social potential is determined by the system of values of generations. The rapid growth of differences in these characteris...

  8. Layer potentials for general linear elliptic systems

    Directory of Open Access Journals (Sweden)

    Ariel Barton

    2017-12-01

    Full Text Available In this article we construct layer potentials for elliptic differential operators using the Babuska-Lax-Milgram theorem, without recourse to the fundamental solution; this allows layer potentials to be constructed in very general settings. We then generalize several well known properties of layer potentials for harmonic and second order equations, in particular the Green's formula, jump relations, adjoint relations, and Verchota's equivalence between well-posedness of boundary value problems and invertibility of layer potentials.

  9. The zero of potential : a persistent error

    NARCIS (Netherlands)

    Burger, H.C.

    Any point of an inanimate system or of a human body can be connected to earth to obtain zero potential. The processes inside the system are independent of this connection. It is only the potential differences which matter. An absolute value of the potential does not enter in the physical laws and,

  10. METHODOLOGY FOR DETERMINATION OF ENTERPRISE POTENTIAL COMPETITIVENESS

    Directory of Open Access Journals (Sweden)

    A. F. Zubritsky

    2010-01-01

    Full Text Available The paper considers economic principles on enterprise potential management and its competitiveness.  Elements of the enterprise economic potential that permit to select an efficient strategy of an organization behaviour are presented in the paper. The paper proposes a methodology for determination of enterprise potential competitiveness on the basis of the existing standard indices and various competitiveness levels.

  11. The electromagnetic potentials without the gauge transformations

    Energy Technology Data Exchange (ETDEWEB)

    Espinoza, Augusto; Chubykalo, Andrey; Rodriguez, Alejandro Gutierrez; Hernandez, Maria de los Angeles [Universidad Autonoma de Zacatecas (Mexico). Unidad Academica de Fisica

    2011-07-01

    In this note we show that the use of the Helmholtz theorem lead to derivation of uniquely determined electromagnetic potentials without making use of the gauge transformation. These potentials correspond to the potentials obtained by imposing so-called Coulomb condition (gauge) in the traditional approach. We show that the electromagnetic field comprises two components, one of which is characterized by its instantaneous action at a distance, whereas another one propagates in the retarded form with the velocity of light. One of the theoretical consequences of this new definition is that the electromagnetic potentials are real physical quantities as well as the electric and magnetic fields. We show that the reality of the electromagnetic potentials in quantum-mechanics is also a property of these potentials in the classical electrodynamics. Equations for potentials obtained in our approach are already separated with respect to vector and scalar potentials, so there is no necessity in using the gauge transformations and, accordingly, in making use of either Lorentz or Coulomb condition. The vector potential and scalar potential introduced thus are uniquely defined. The scalar potential is a generator of the so called instantaneous action at a distance, whereas the solenoidal vector potential can propagate with the velocity of light and it is responsible for the retarded action of the electromagnetic field. (author)

  12. QCD string model for hybrid adiabatic potentials

    OpenAIRE

    Kalashnikova, Yu. S.; Kuzmenko, D. S.

    2001-01-01

    Hybrid adiabatic potentials are considered in the framework of the QCD string model. The einbein field formalism is applied to obtain the large-distance behaviour of adiabatic potentials. The calculated excitation curves are shown to be the result of interplay between potential-type longitudinal and string-type transverse vibrations. The results are compared with recent lattice data.

  13. Proton radioactivity with analytically solvable potential

    Indian Academy of Sciences (India)

    The phenomenon of proton emission is treated as a process of asymmetric fission through a one-dimensional potential barrier developed due to combined effects of the Coulomb potential, centrifugal potential and various renormalization processes. The barrier is simulated to an asymmetric, smooth and analytically solvable ...

  14. Stochastic Resonance in Periodic Potentials Revisited

    OpenAIRE

    Reenbohn, W. L.; Pohlong, S. S.; Mahato, Mangal C

    2012-01-01

    The phenomenon of Stochastic Resonance (SR) has been conclusively demonstrated in bistable potentials. However, SR in sinusoidal potentials have only recently been shown numerically to occur in terms of hysteresis loop area. We show that the occurrence of SR is not specific to sinusoidal potentials and can occur in periodic bistable potential, $U(x)=2/3(\\cos x +\\cos 2x)$, as well. We further show that SR can occur even in a washboard potential, where hysteresis loops normally do not close bec...

  15. Ionization potentials some variations, implications and applications

    CERN Document Server

    Ahrens, L H

    1983-01-01

    Ionization Potentials: Some Variations, Implications and Applications covers several aspects of ionization potential that is a highly significant parameter in controlling the properties of electric discharge. Comprised of 17 chapters, the book covers topic relevant to ionization potentials, such as properties, concepts, and applications, in order to understand and fully comprehend all aspects of ionization potential. The opening chapter is a review of ionization potentials and a discussion of trends and features. The succeeding chapters then tackle complex topics such as the s and p electrons;

  16. Conduction velocity of antigravity muscle action potentials.

    Science.gov (United States)

    Christova, L; Kosarov, D; Christova, P

    1992-01-01

    The conduction velocity of the impulses along the muscle fibers is one of the parameters of the extraterritorial potentials of the motor units allowing for the evaluation of the functional state of the muscles. There are no data about the conduction velocities of antigravity muscleaction potentials. In this paper we offer a method for measuring conduction velocity of potentials of single MUs and the averaged potentials of the interference electromiogram (IEMG) lead-off by surface electrodes from mm. sternocleidomastoideus, trapezius, deltoideus (caput laterale) and vastus medialis. The measured mean values of the conduction velocity of antigravity muscles potentials can be used for testing the functional state of the muscles.

  17. Remote RemoteRemoteRemote sensing potential for sensing ...

    African Journals Online (AJOL)

    Remote RemoteRemoteRemote sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing potential for sensing p. A Ngie, F Ahmed, K Abutaleb ...

  18. Chloroplast Response to Low Leaf Water Potentials

    Science.gov (United States)

    Boyer, J. S.; Potter, J. R.

    1973-01-01

    The effect of decreases in turgor on chloroplast activity was studied by measuring the photochemical activity of intact sunflower (Helianthus annuus L. cv. Russian Mammoth) leaves having low water potentials. Leaf turgor, calculated from leaf water potential and osmotic potential, was found to be affected by the dilution of cell contents by water in the cell walls, when osmotic potentials were measured with a thermocouple psychrometer. After the correction of measurements of leaf osmotic potential, both the thermocouple psychrometer and a pressure chamber indicated that turgor became zero in sunflower leaves at leaf water potentials of −10 bars. Since most of the loss in photochemical activity occurred at water potentials below −10 bars, it was concluded that turgor had little effect on the photochemical activity of the leaves. PMID:16658486

  19. Research potential and cognitive features of students.

    Directory of Open Access Journals (Sweden)

    Bordovskaia N.V.

    2014-12-01

    Full Text Available This article examines the theoretical and methodological justifications for studying students’ research potential. It presents proof of the isomorphic nature of human research activity and research potential as well as of the fluid nature of its development: from research-like behavior to science-based research activity. It defines three functional components (motivational, cognitive, and behavioral that form the structure of research potential. It further presents the results of empirically studying the cognitive features of master’s students possessing different levels of research potential. It provides data on the dynamics of research-potential components at different educational levels (bachelor’s and master’s programs. Special attention is given to a comparative analysis of evaluations by research tutors regarding their students’ research potential and of the indicators obtained using psychodiagnostic methods.

  20. Enterprise Potential: Essence, Classification and Types

    Directory of Open Access Journals (Sweden)

    Turylo Anatolii M.

    2014-02-01

    Full Text Available The article considers existing approaches to classification of the enterprise potential as an economic notion. It offers own vision of classification of enterprise potential, which meets modern tendencies of enterprise development. Classification ensures a possibility of a wider description and assessment of enterprise potential and also allows identification of its most significant characteristics. Classification of the enterprise potential is developed by different criteria: by functions, by resource support, by ability to adapt, by the level of detection, by the spectrum of taking into account possibilities, by the period of coverage of possibilities and by the level of use. Analysis of components of the enterprise potential allows obtaining a complete and trustworthy assessment of the state of an enterprise. Adaptation potential of an enterprise is based on principles systemacy and dynamism, it characterises possibilities of adjustment of an enterprise to external and internal economic conditions.

  1. Detecting Potential Insider Threats Through Email Datamining

    Science.gov (United States)

    2006-03-01

    Detecting Potential Insider Threats through Email Datamining THESIS James Okolica, First Lieutenant, USAF AFIT/GCS/ENG/06-10 DEPARTMENT OF THE AIR...States Government. AFIT/GCS/ENG/06-10 Detecting Potential Insider Threats through Email Datamining THESIS Presented to the Faculty Department of...March 2006 APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED. AFIT/GCS/ENG/06-10 Detecting Potential Insider Threats through Email Datamining James

  2. Systematics of $\\alpha$--nucleus optical potentials

    OpenAIRE

    Mohr, P; Abele, H.; Atzrott, U.; Staudt, G.; Bieber, R; Grün, K.; Oberhummer, H.; Rauscher, T.; Somorjai, E.

    1994-01-01

    Double--folded optical $\\alpha$--nucleus potentials can be used to calculate elastic scattering cross sections in a wide mass-- and energy region. Because of the systematic behavior of the potential parameters we are able to obtain reliable optical potentials for astrophysically relevant reactions even without scattering data in low--energy region. As example we analyze the capture reaction ${^{144}{\\rm Sm}}(\\alpha,\\gamma){^{148}{\\Gd}}$.

  3. Research of photoinduced potentials of pepper leaves

    OpenAIRE

    D. V. Chernetchenko; MOTSNYJ M.P.; N. P. Botsva; О. V. Elina

    2015-01-01

    Bioelectrical potentials of the plants during photostimulation with various intensity values and wave lengths are studied. Such stimulation provides light-dependent reactions of photosynthesis. The universal scheme of registration of bioelectric potentials, which allows to carry out the experimental study of light stimuli effect on the plant is proposed. All registrations of potentials are observed on the pepper leaves. Photoinduced stimuli are different with intensity changed from 150 to 450...

  4. Potential radiation doses from 1994 Hanford Operations

    Energy Technology Data Exchange (ETDEWEB)

    Soldat, J.K.; Antonio, E.J.

    1995-06-01

    This section of the 1994 Hanford Site Environmental Report summarizes the potential radiation doses to the public from releases originating at the Hanford Site. Members of the public are potentially exposed to low-levels of radiation from these effluents through a variety of pathways. The potential radiation doses to the public were calculated for the hypothetical MEI and for the general public residing within 80 km (50 mi) of the Hanford Site.

  5. Understanding Vertical Jump Potentiation: A Deterministic Model.

    Science.gov (United States)

    Suchomel, Timothy J; Lamont, Hugh S; Moir, Gavin L

    2016-06-01

    This review article discusses previous postactivation potentiation (PAP) literature and provides a deterministic model for vertical jump (i.e., squat jump, countermovement jump, and drop/depth jump) potentiation. There are a number of factors that must be considered when designing an effective strength-power potentiation complex (SPPC) focused on vertical jump potentiation. Sport scientists and practitioners must consider the characteristics of the subject being tested and the design of the SPPC itself. Subject characteristics that must be considered when designing an SPPC focused on vertical jump potentiation include the individual's relative strength, sex, muscle characteristics, neuromuscular characteristics, current fatigue state, and training background. Aspects of the SPPC that must be considered for vertical jump potentiation include the potentiating exercise, level and rate of muscle activation, volume load completed, the ballistic or non-ballistic nature of the potentiating exercise, and the rest interval(s) used following the potentiating exercise. Sport scientists and practitioners should design and seek SPPCs that are practical in nature regarding the equipment needed and the rest interval required for a potentiated performance. If practitioners would like to incorporate PAP as a training tool, they must take the athlete training time restrictions into account as a number of previous SPPCs have been shown to require long rest periods before potentiation can be realized. Thus, practitioners should seek SPPCs that may be effectively implemented in training and that do not require excessive rest intervals that may take away from valuable training time. Practitioners may decrease the necessary time needed to realize potentiation by improving their subject's relative strength.

  6. Tachyon potentials from a supersymmetric FRW model

    OpenAIRE

    GARCÍA-JIMÉNEZ, G.; Ramírez, C.; Vázquez-Báez, V.

    2013-01-01

    Considering that the effective theory of closed string tachyons can have worldsheet supersymmetry, as shown by Vafa, we study a worldline supersymmetric action in a FRW background, whose superpotential originates a tachyon scalar potential. There are such potentials with spontaneously broken supersymmetry at the instability and supersymmetric after tachyon condensation. Furthermore, given a tachyonic potential, the superpotential can be computed by a power series ansatz and has a free paramet...

  7. Pumped Storage and Potential Hydropower from Conduits

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2015-02-25

    Th is Congressional Report, Pumped Storage Hydropower and Potential Hydropower from Conduits, addresses the technical flexibility that existing pumped storage facilities can provide to support intermittent renewable energy generation. This study considered potential upgrades or retrofit of these facilities, the technical potential of existing and new pumped storage facilities to provide grid reliability benefits, and the range of conduit hydropower opportunities available in the United States.

  8. Geophysical Processes - MO 2013 Collapse Potential (SHP)

    Data.gov (United States)

    NSGIC State | GIS Inventory — Collapse potential correlates with locations of underground mines and sinkholes. Computer-generated hazard calculations include areas in close proximity to mines and...

  9. NETWORK ECONOMY INNOVATIVE POTENTIAL EVALUATION METHOD

    Directory of Open Access Journals (Sweden)

    E. V. Loguinova

    2011-01-01

    Full Text Available Existing methodological approaches to assessment of the innovation potential having been analyzed, a network system innovative potential identification and characterization method is proposed that makes it possible to assess the potential’s qualitative and quantitative components and to determine their consistency with national innovative system formation and development objectives. Four stages are recommended and determined to assess the network economy innovative potential. Main structural elements of the network economy innovative potential are the resource, institutional, infrastructural and resulting factor totalities.

  10. Unusual but potential agents of terrorists.

    Science.gov (United States)

    Holstege, Christopher P; Bechtel, Laura K; Reilly, Tracey H; Wispelwey, Bram P; Dobmeier, Stephen G

    2007-05-01

    Emergency personnel are tasked with the daunting job of being the first to evaluate and manage victims of a terrorist attack. Numerous potential chemical agents could be used by terrorists. The challenge for first responders and local hospital emergency personnel is to prepare for a terrorist event that might use one or more of these agents. As part of that preparation, emergency physicians should have a basic understanding of potential chemical terrorist agents. It is beyond the scope of this article to review all potential terrorist agents. Rather, four potential agents have been chosen for review: sodium monofluoroacetate, trichothecene mycotoxins, vomiting agents, and saxitoxin.

  11. Measurement of human potential in organizations

    Directory of Open Access Journals (Sweden)

    Rosa María Fuchs Ángeles

    2015-09-01

    Full Text Available Companies around the world are concerned about talent management in their organizations. The concern is to retain talented employees and this may not be possible if they are not properly identified. Performance and potential evaluations become then important. Performance evaluations qualify the historical record of the employee, so their measurement is provided. However, measuring the potential performance assesses potential future charges, therefore it is not a simple task. In this paper, characteristics evaluated in potential employees and tools that are commonly used are presented. Also, the case of four companies operating in Peru is shown.

  12. Melting line of Krypton in extreme thermodynamic regimes

    Directory of Open Access Journals (Sweden)

    Giuffre', E

    2007-01-01

    Full Text Available We have performed extensive computer simulations of the thermodynamic and structural properties of the krypton rare gas modeled by the modified Buckingham exponential-6 interatomic potential. Using a new set of potential parameters, we have found a good agreement with the room temperature equation of state at very high pressure obtained by diamond anvil cell experiments. Moreover, the melting line of the model has been estimated through the Lindemann criterion; the agreement with the low-pressure experiments is excellent, whereas at higher pressure, the model poorly reproduces the typical softening of the experimental melting curve.

  13. Transient receptor potential channels in essential hypertension

    DEFF Research Database (Denmark)

    Liu, Daoyan; Scholze, Alexandra; Zhu, Zhiming

    2006-01-01

    The role of nonselective cation channels of the transient receptor potential channel (TRPC) family in essential hypertension has not yet been investigated.......The role of nonselective cation channels of the transient receptor potential channel (TRPC) family in essential hypertension has not yet been investigated....

  14. Deriving relativistic Bohmian quantum potential using variational ...

    Indian Academy of Sciences (India)

    Deriving relativistic Bohmian quantum potential using variational method and conformal transformations ... We obtain this potential by using variational method. Then ... Department of Physics, Ferdowsi University of Mashhad, Azadi Sq., Mashhad, Iran; School of Physics, Institute for Research in Fundamental Science (IPM), ...

  15. Growth potential of the family camping market

    Science.gov (United States)

    W.F. LaPage; W.F. LaPage

    1973-01-01

    A study of the camping market's short-term growth potential, based upon interviews with the heads of 2,003 representative American households. The study estimates the size of the potential camping market and divides it into three segments: those families with a high, medium and low propensity to become campers. The developed camping market is also divided into an...

  16. Leukoplakia: A short review on malignant potential

    Directory of Open Access Journals (Sweden)

    K. M. K. Masthan

    2015-01-01

    Full Text Available Oral leukoplakia is one of the most common potentially malignant disorders. Right diagnosis of potentially malignant disorders may help to prevent these lesions from malignant transformation. Proper understanding, recognizing, identification and differentiating these lesions from normal mucosa are necessary for proper treatment.

  17. Potential roughness near lithographically fabricated atom chips

    DEFF Research Database (Denmark)

    Krüger, Peter; Andersson, L. M.; Wildermuth, Stefan

    2007-01-01

    Potential roughness has been reported to severely impair experiments in magnetic microtraps. We show that these obstacles can be overcome as we measure disorder potentials that are reduced by two orders of magnitude near lithographically patterned high-quality gold layers on semiconductor atom chip...

  18. Black Hole Dynamic Potentials Koustubh Ajit Kabe

    Indian Academy of Sciences (India)

    Abstract. In the following paper, certain black hole dynamic potentials have been developed definitively on the lines of classical thermodynam- ics. These potentials have been refined in view of the small differences in the equations of the laws of black hole dynamics as given by Bekenstein and those of thermodynamics.

  19. Heavy quarkonium properties from Cornell potential using ...

    Indian Academy of Sciences (India)

    2016-10-08

    Oct 8, 2016 ... literature related to quark potentials, we would like to list refs [7,12–19]. Although this list is incom- plete, these references are a good starting point on .... Schematic representation of potential V1 and its first two supersymmetric partners V2 and V3 with its corre- sponding spectrum. The ground state in V1 is ...

  20. YouTube: Educational Potentials and Pitfalls

    Science.gov (United States)

    Jones, Troy; Cuthrell, Kristen

    2011-01-01

    The instructional potential of video technology in the classroom is promising, especially in light of the 21st Century Learning Framework (Siegle, 2009). Studies show positive gains in student outcomes as a result of the integration of video technology in instruction. This article explores potential uses of YouTube as an instructional aid in…

  1. Simulation of action potential propagation in plants.

    Science.gov (United States)

    Sukhov, Vladimir; Nerush, Vladimir; Orlova, Lyubov; Vodeneev, Vladimir

    2011-12-21

    Action potential is considered to be one of the primary responses of a plant to action of various environmental factors. Understanding plant action potential propagation mechanisms requires experimental investigation and simulation; however, a detailed mathematical model of plant electrical signal transmission is absent. Here, the mathematical model of action potential propagation in plants has been worked out. The model is a two-dimensional system of excitable cells; each of them is electrically coupled with four neighboring ones. Ion diffusion between excitable cell apoplast areas is also taken into account. The action potential generation in a single cell has been described on the basis of our previous model. The model simulates active and passive signal transmission well enough. It has been used to analyze theoretically the influence of cell to cell electrical conductivity and H(+)-ATPase activity on the signal transmission in plants. An increase in cell to cell electrical conductivity has been shown to stimulate an increase in the length constant, the action potential propagation velocity and the temperature threshold, while the membrane potential threshold being weakly changed. The growth of H(+)-ATPase activity has been found to induce the increase of temperature and membrane potential thresholds and the reduction of the length constant and the action potential propagation velocity. Copyright © 2011 Elsevier Ltd. All rights reserved.

  2. Singularity Theory for W-Algebra Potentials

    NARCIS (Netherlands)

    Gaite, J

    1994-01-01

    The Landau potentials of W3-algebra models are analyzed with algebraic-geometric methods. The number of ground states and the number of independent perturbations of every potential coincide and can be computed. This number agrees with the structure of ground states obtained in a previous paper,

  3. Identification of potentially competing Afrotropical and Palaearctic ...

    African Journals Online (AJOL)

    Identification of potentially competing Afrotropical and Palaearctic bird species in the Sahel. ... Areas experiencing a seasonal influx of migrants may be expected to have a high potential for competition between resident and migrant populations. Described differences in foraging behaviour and microhabitat selection ...

  4. Potentials of Rubella Deaf-Blind Children.

    Science.gov (United States)

    Smith, Benjamin F.

    Potentials of three classifications of rubella deaf blind children are discussed. Potentials for children at the middle trainable level and below are discussed for the areas of communication skills, daily living skills, mobility and orientation, vocational effort, and self-control and social interaction. For children in the upper trainable through…

  5. Streaming potential near a rotating porous disk.

    Science.gov (United States)

    Prieve, Dennis C; Sides, Paul J

    2014-09-23

    Theory and experimental results for the streaming potential measured in the vicinity of a rotating porous disk-shaped sample are described. Rotation of the sample on its axis draws liquid into its face and casts it from the periphery. Advection within the sample engenders streaming current and streaming potential that are proportional to the zeta potential and the disk's major dimensions. When Darcy's law applies, the streaming potential is proportional to the square of the rotation at low rate but becomes invariant with rotation at high rate. The streaming potential is invariant with the sample's permeability at low rate and is proportional to the inverse square of the permeability at high rate. These predictions were tested by determining the zeta potential and permeability of the loop side of Velcro, a sample otherwise difficult to characterize; reasonable values of -56 mV for zeta and 8.7 × 10(-9) m(2) for the permeability were obtained. This approach offers the ability to determine both the zeta potential and the permeability of materials having open structures. Compressing them into a porous plug is unnecessary. As part of the development of the theory, a convenient formula for a flow-weighted volume-averaged space-charge density of the porous medium, -εζ/k, was obtained, where ε is the permittivity, ζ is the zeta potential, and k is the Darcy permeability. The formula is correct when Smoluchowski's equation and Darcy's law are both valid.

  6. Unjamming in models with analytic pairwise potentials

    NARCIS (Netherlands)

    Kooij, S.; Lerner, E.

    Canonical models for studying the unjamming scenario in systems of soft repulsive particles assume pairwise potentials with a sharp cutoff in the interaction range. The sharp cutoff renders the potential nonanalytic but makes it possible to describe many properties of the solid in terms of the

  7. Weak gravitational field and Coriolis potential

    Indian Academy of Sciences (India)

    Analysis of this phenomenon from the point of view of Lagrangian and Hamiltonian mechanics is interesting from the general relativistic point of view due to Einstein's principle of equivalence. We show that the vector u → plays the role of vector potential which, however, essentially differs from vector potential known in ...

  8. Comparative study of quantum anharmonic potentials

    Energy Technology Data Exchange (ETDEWEB)

    Amore, Paolo [Facultad de Ciencias, Universidad de Colima, Bernal Diaz del Castillo 340, Colima (Mexico)]. E-mail: paolo@ucol.mx; Aranda, Alfredo [Facultad de Ciencias, Universidad de Colima, Bernal Diaz del Castillo 340, Colima (Mexico); De Pace, Arturo [Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria 1, I-10125 Torino (Italy); Lopez, Jorge A. [Physics Department, University of Texas at El Paso, El Paso, TX (United States)

    2004-09-06

    We perform a study of various anharmonic potentials using a recently developed method. We calculate both the wave functions and the energy eigenvalues for the ground and first excited states of the quartic, sextic and octic potentials with high precision, comparing the results with other techniques available in the literature.

  9. Developing simplified Regional Potential Evapotranspiration (PET ...

    African Journals Online (AJOL)

    Regional Potential Evapotranspiration (PET) estimation method was developed to estimate the potential evapotranspiration (reference evapotranspiration) over Abbay Basin as a function of basin maximum and minimum temperature, and modulated by site specific elevation data. The method is intended to estimate PET in ...

  10. The mother of all pair potentials

    DEFF Research Database (Denmark)

    Dyre, J. C.; Bacher, Andreas Kvist

    2014-01-01

    This paper presents a computer simulation study of the exponentially repulsive pair potential system. The simulations show that the system has strong virial potential energy correlations in a large part of its thermodynamic phase diagram. Consequences of this are briefly discussed; these include ...

  11. Bioprospecting and antifungal potential of chitinolytic microorganisms

    African Journals Online (AJOL)

    Many chitinolytic microorganisms have potential to control fungal plant pathogens but they are not fully successful in all the cases due to different geological and environmental conditions. Thus, bioprospecting to find novel, highly chitinolytic microorganisms which help in developing potential biocontrol agent. Furthermore ...

  12. Quantifying indices of potential competitiveness and browse ...

    African Journals Online (AJOL)

    The prediction of indices of potential competition with grass and browse productivity of single-stemmed Acacia karroo trees, using various trunk and canopy parameters, was evaluated on the basis of the variance accounted for by each of four operators and the repeatability for all operators. Potential competitiveness and ...

  13. Ephemeral Electric Potential and Electric Field Sensor

    Science.gov (United States)

    Generazio, Edward R. (Inventor)

    2017-01-01

    Systems, methods, and devices of the various embodiments provide for the minimization of the effects of intrinsic and extrinsic leakage electrical currents enabling true measurements of electric potentials and electric fields. In an embodiment, an ephemeral electric potential and electric field sensor system may have at least one electric field sensor and a rotator coupled to the electric field sensor and be configured to rotate the electric field sensor at a quasi-static frequency. In an embodiment, ephemeral electric potential and electric field measurements may be taken by rotating at least one electric field sensor at a quasi-static frequency, receiving electrical potential measurements from the electric field sensor when the electric field sensor is rotating at the quasi-static frequency, and generating and outputting images based at least in part on the received electrical potential measurements.

  14. The Maritime Potential of ASEAN Economies

    Directory of Open Access Journals (Sweden)

    Hans-Dieter Evers

    2011-01-01

    Full Text Available Countries may utilize a long coastline in relation to their landmass as a resource to develop their maritime economy. This paper argues that ASEAN countries differ in utilizing their maritime potential. As a basis for further comparative studies the Center for Policy Research and International Studies (CenPRIS in Penang developed a set of indicators to measure the maritime potential of nations, the state of their maritime industries, and the degree to which the maritime potential has actually been utilized. Using the CenPRIS Ocean Index (COI shows that Brunei and the Philippines have underutilized their maritime potentials, whereas Singapore and Thailand have made full use of it. Malaysia still has the potential to further develop its maritime economy.

  15. Morphing the He-OCS intermolecular potential

    Science.gov (United States)

    Howson, Joanna M. M.; Hutson, Jeremy M.

    2001-09-01

    A potential energy surface for He-OCS that agrees with experimental rotational spectra to within 1 MHz is presented. The potential was first calculated at a grid defined in prolate spheroidal coordinates, which give stabler interpolations than Jacobi coordinates. Coupled cluster calculations at the CCSD(T) level were carried out with an aug-cc-pVTZ basis set. The potential was then morphed, a procedure that scales the energy and the intermolecular distance in a coordinate-dependent way. The parameters of the function used for morphing were determined by a least-squares fit to the experimental data. The global minimum of the recommended potential, at -50.2 cm-1, is 4.8 cm-1 deeper than the unscaled potential of Higgins and Klemperer [J. Chem. Phys. 110, 1383 (1999)]. The morphing procedure increases the well depth by more at the sulfur end than at the oxygen end.

  16. Rogue waves management by external potentials

    Energy Technology Data Exchange (ETDEWEB)

    Al Khawaja, U., E-mail: u.alkhawaja@uaeu.ac.ae [Physics Department, United Arab Emirates University, P.O. Box 17551, Al-Ain (United Arab Emirates); Taki, Majid [Laboratoire de Physique des Lasers, Atomes et Molécules, CNRS UMR 8523, Centre d' Etudes et de Recherches Lasers et Applications, Université de Lille 1 (Sciences et Technologies), 59655 Villeneuve d' Ascq Cedex (France)

    2013-12-02

    We study the effect of time-dependent linear and quadratic potentials on the profile and dynamics of rogue waves represented by a Peregrine soliton. The Akhmediev breather, Ma breather, bright soliton, Peregrine soliton, and constant wave (CW) are all obtained by changing the value of one parameter in the general solution corresponding to the amplitude of the input CW. The corresponding solutions for the case with linear and quadratic potentials were derived by the similarity transformation method. While the peak height and width of the rogue wave turn out to be insensitive to the linear potential, the trajectory of its center-of-mass can be manipulated with an arbitrary time-dependent slope of the linear potential. With a quadratic potential, the peak height and width of the rogue wave can be arbitrarily manipulated to result, for a special case, in a very intense pulse.

  17. Coherence potentials encode simple human sensorimotor behavior.

    Directory of Open Access Journals (Sweden)

    Dhanya Parameshwaran

    Full Text Available Recent work has shown that large amplitude negative periods in the local field potential (nLFPs are able to spread in saltatory manner across large distances in the cortex without distortion in their temporal structure forming 'coherence potentials'. Here we analysed subdural electrocorticographic (ECoG signals recorded at 59 sites in the sensorimotor cortex in the left hemisphere of a human subject performing a simple visuomotor task (fist clenching and foot dorsiflexion to understand how coherence potentials arising in the recordings relate to sensorimotor behavior. In all behaviors we found a particular coherence potential (i.e. a cascade of a particular nLFP wave pattern arose consistently across all trials with temporal specificity. During contrateral fist clenching, but not the foot dorsiflexion or ipsilateral fist clenching, the coherence potential most frequently originated in the hand representation area in the somatosensory cortex during the anticipation and planning periods of the trial, moving to other regions during the actual motor behavior. While these 'expert' sites participated more consistently, other sites participated only a small fraction of the time. Furthermore, the timing of the coherence potential at the hand representation area after onset of the cue predicted the timing of motor behavior. We present the hypothesis that coherence potentials encode information relevant for behavior and are generated by the 'expert' sites that subsequently broadcast to other sites as a means of 'sharing knowledge'.

  18. Four potential gravitation and its quantization

    Energy Technology Data Exchange (ETDEWEB)

    Poth, Hartwig

    2014-07-01

    In the preceding theory of gravitation, the gravitation potential has been considered as a scalar potential having as its source the proper time density from rest mass. In the present amended theory, however, the gravitation potential is considered as a four potential like the electromagnetic four potential. The new source term is the four rest mass current density like the four electrical charge current density in the electromagnetic theory. That new theory yields essentially the same results as the former scalar theory. The Mercury perihelion like some other effects known from general relativity can be calculated likewise. Gravitational radiation can be calculated only up to a constant factor which is to be taken from general relativity. In the preceding theory, there had been a calculation error insofar; in principle, however there is no difference to the result of general relativity. There is still also a gravitational monopole radiation. The spin of the new gravitational field is also zero. Moreover, with the Dirac equation a relativistic quantum mechanical equation of gravitation is obtained, which in the classical limit coincides with the new classical theory. The new gravitational potential obviously can be quantized. In principle, the new gravitational potential can interact with the spin of the electron. However, free gravitational waves can not interact with the spin of the electron, also because free gravitational waves have no spin.

  19. Abuse Potential of Pregabalin: A Systematic Review.

    Science.gov (United States)

    Schjerning, Ole; Rosenzweig, Mary; Pottegård, Anton; Damkier, Per; Nielsen, Jimmi

    2016-01-01

    Several case reports and epidemiological studies have raised concern about the abuse potential of pregabalin, the use of which has increased substantially over the last decade. Pregabalin is, in some cases, used for recreational purposes and it has incurred attention among drug abusers for causing euphoric and dissociative effects when taken in doses exceeding normal therapeutic dosages or used by alternative routes of administration, such as nasal insufflation or venous injection. The magnitude of the abuse potential and the mechanism behind it are not fully known. The aim of this study was to present a systematic review of the data concerning the abuse potential of pregabalin. We performed a systematic literature search and reviewed the preclinical, clinical and epidemiological data on the abuse potential of pregabalin. We included preclinical (n = 17), clinical (n = 19) and epidemiological (n = 13) studies addressing the abuse potential of pregabalin. We also reviewed case reports (n = 9) concerning abuse of pregabalin. The preclinical studies indicated that pregabalin possesses modulatory effects on the GABA and glutamate systems, leaving room for an abuse potential. Further, clinical studies reported euphoria as a frequent side effect in patients treated with pregabalin. The majority of case reports concerning abuse of pregabalin involved patients with a history of substance abuse and, similarly, epidemiological studies found evidence of abuse, especially among opiate abusers. Overall, the available literature suggests an important clinical abuse potential of pregabalin and prescribers should pay attention to signs of abuse, especially in patients with a history of substance abuse.

  20. Chloride equilibrium potential in salamander cones

    Directory of Open Access Journals (Sweden)

    Bryson Eric J

    2004-12-01

    Full Text Available Abstract Background GABAergic inhibition and effects of intracellular chloride ions on calcium channel activity have been proposed to regulate neurotransmission from photoreceptors. To assess the impact of these and other chloride-dependent mechanisms on release from cones, the chloride equilibrium potential (ECl was determined in red-sensitive, large single cones from the tiger salamander retinal slice. Results Whole cell recordings were done using gramicidin perforated patch techniques to maintain endogenous Cl- levels. Membrane potentials were corrected for liquid junction potentials. Cone resting potentials were found to average -46 mV. To measure ECl, we applied long depolarizing steps to activate the calcium-activated chloride current (ICl(Ca and then determined the reversal potential for the current component that was inhibited by the Cl- channel blocker, niflumic acid. With this method, ECl was found to average -46 mV. In a complementary approach, we used a Cl-sensitive dye, MEQ, to measure the Cl- flux produced by depolarization with elevated concentrations of K+. The membrane potentials produced by the various high K+ solutions were measured in separate current clamp experiments. Consistent with electrophysiological experiments, MEQ fluorescence measurements indicated that ECl was below -36 mV. Conclusions The results of this study indicate that ECl is close to the dark resting potential. This will minimize the impact of chloride-dependent presynaptic mechanisms in cone terminals involving GABAa receptors, glutamate transporters and ICl(Ca.

  1. Marketing potential of industrial companies of Ukraine

    Directory of Open Access Journals (Sweden)

    O.V. Oliynyk

    2016-03-01

    Full Text Available The article determines the essence of the marketing potential of the company as a part of improving the efficiency of the company’s activity forming a united mechanism along with industrial and financial subsystems. The components of the total potential of the company, the factors forming structure of the marketing potential of the company and the approaches to the evaluation of such a potential of the company are considered. It is determined that the marketing potential of the company integrates all the marketing resources, reserves and the possibility of their use, and the functioning as well as development of the system are subjected to the achievement of the main company’s goals. The differences in the interpretation of economic, market and marketing potential of the company are identified, although they are related to the subject of entrepreneurship, but they differ in their essence. The substantiation of the essence of marketing potential of the company, the development of an effective mechanism of its management with the possibility of evaluation will contribute to the maximum satisfaction of interests of information consumers’ groups, the formation of strategic directions of the activity, making management decisions at the micro level, the effective functioning in the internal and external markets.

  2. Regional Differentiation of Human Potential Indicators

    Directory of Open Access Journals (Sweden)

    Vyacheslav Veniaminovich Lokosov

    2015-12-01

    Full Text Available The purpose of the article is the interregional analysis of human potential. In comparison with the quality of life of the population, the quality of population itself is studied far less. The article presents an expanded characteristic of human potential in seven directions: economic activity, demographic processes, physical health, cultural potential, social health, educational potential and the attitude of the population to the environment. On the basis of statistics for 2008–2012 years, 63 indicators of human potential for all directions are selected. In the final result, the correlation analysis has led to the substantiation of the system of indicators consisting of 10 indicators. Three economic and seven social indicators characterizing human potential are included into this system. On the basis of the indicators by means of hierarchical agglomerative methods of cluster analysis, a classification of the Russian regions is carried out in two versions: with economic indicators and without them. The result of the calculations is a stable temporal typology of regions by indicators of human potential covering 74.4 % of the population of Russia. The article provides a substantial interpretation of dividing regions into groups, identifies the strengths and weaknesses of each cluster, shows the specific features of the regions included into the clusters. The obtained results can be used in the development of measures for the reduction of the interregional inequality in terms of human potential. It is possible to define what measures can be effective by studying the strategic directions of the development of regions in the cluster which is the most successful regarding the characteristics of human potential.

  3. Potentials of development in protected areas

    Directory of Open Access Journals (Sweden)

    Jernej Tiran

    2008-12-01

    Full Text Available The aim of this article is to expose the ways of recognizing potentials for development in the following selected protected areas: Triglav National Park (TNP, Goričko Landscape Park (KPG and Logarska dolina Landscape Park (KPLD. Basing our results on a survey, which was carried out among locals and tourists, we found out that the ways in which people see potentials for development differ. On the basis of their answers and our analysis of the actual state we established certain potentials for development, which are in compliance with the following principles: they result from the local sources, are in compliance with the applicable legislation and are sustainable.

  4. Effective Kratzer and Coulomb potentials as limit cases of a multiparameter exponential-type potential

    Energy Technology Data Exchange (ETDEWEB)

    García-Ravelo, J., E-mail: g.ravelo@hotmail.com [Departamento de Física, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Edificio 9, Unidad Profesional Adolfo López Mateos, México D.F., 07738 (Mexico); Menéndez, A.; García-Martínez, J. [Departamento de Física, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Edificio 9, Unidad Profesional Adolfo López Mateos, México D.F., 07738 (Mexico); Schulze-Halberg, A. [Department of Mathematics and Actuarial Science and Department of Physics, Indiana University Northwest, 3400 Broadway, Gary, IN 46408 (United States)

    2014-06-13

    We show that the effective Kratzer and Coulomb potentials can be obtained by taking particular limits of a multiparameter exponential potential that was studied recently. Moreover, we demonstrate that the bound state solutions of the exponential potential reduce correctly to their well-known counterparts associated with the Kratzer and Coulomb potentials. As a byproduct, we obtain a new limit relation for the hypergeometric function. - Highlights: • Kratzer and Coulomb potentials are limit cases of an exponential-type potential. • From exact s-waves, approximate solutions for l-waves are obtained. • l-waves of the potential tend to the solutions of the Kratzer and Coulomb potentials. • A non-evident identity between hypergeometric functions is demonstrated.

  5. Potential Advantages of Reusing Potentially Contaminated Land for Renewable Energy Fact Sheet

    Science.gov (United States)

    EPA promotes the reuse of potentially contaminated lands and landfills for renewable energy. This strategy creates new markets for potentially contaminated lands, while providing a sustainable land development strategy for renewable energy.

  6. Thalassiosira mala (Bacillariophyta), a potentially harmful, marine ...

    Indian Academy of Sciences (India)

    Thalassiosira malaitalic> (Bacillariophyta), a potentially harmful, marine diatom from Chilka Lake and other coastal localities of Odisha, India: Nomenclature, ... Department of Biological Science, Florida State University, Tallahassee, FL 32306–4370, USA; Department of Biology, Valdosta State University, Valdosta, GA ...

  7. Heavy quarkonium properties from Cornell potential using ...

    Indian Academy of Sciences (India)

    Home; Journals; Pramana – Journal of Physics; Volume 87; Issue 5. Heavy quarkonium properties from Cornell potential using variational method and supersymmetric quantum mechanics. ALFREDO VEGA JORGE FLORES. Regular ... Keywords. Quarkonium; variational method; supersymmetric quantum mechanics.

  8. VT Act 174 Ground Mount Solar Potential

    Data.gov (United States)

    Vermont Center for Geographic Information — (Link to Metadata) The only statewide solar potential layer available used in the Act 174 effort comes from the 2010 Renewable Energy Atlas of Vermont (REAVT) effort...

  9. OLED Lighting Products: Capabilities, Challenges, Potential

    Energy Technology Data Exchange (ETDEWEB)

    Miller, N. J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Leon, F. A. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2016-05-31

    A report that focuses on the potential for architectural OLED lighting – describing currently available OLED products as well as promised improvements, and addressing the technology and market hurdles that have thus far prevented wider use of OLEDs.

  10. Habitat Analysis - Trinity River Restoration Potential

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the Trinity River project is to identify the potential positive effects of large-scale restoration actions in a 63 kilometer reach of the Trinity River...

  11. Geomorphic Analysis - Trinity River Restoration Potential

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the Trinity River project is to identify the potential positive effects of large-scale restoration actions in a 63 kilometer reach of the Trinity River...

  12. Newtonian potential in quantum Regge gravity

    CERN Document Server

    Hamber, H W; Herbert W Hamber; Ruth M Williams

    1995-01-01

    ABSTRACT: We show how the Newtonian potential between two heavy masses can be computed in simplicial quantum gravity. On the lattice we compute correlations between Wilson lines associated with the heavy particles and which are closed by the lattice periodicity. We check that the continuum analog of this quantity reproduces the Newtonian potential in the weak field expansion. In the smooth anti-de Sitter-like phase, which is the only phase where a sensible lattice continuum limit can be constructed in this model, we attempt to determine the shape and mass dependence of the attractive potential close to the critical point in G. It is found that non-linear graviton interactions give rise to a potential which is Yukawa-like, with a mass parameter that decreases towards the critical point where the average curvature vanishes. In the vicinity of the critical point we give an estimate for the effective Newton constant.

  13. Potential organ donor audit in Ireland.

    LENUS (Irish Health Repository)

    Hegarty, M

    2010-11-01

    As increasing demand for organs is a challenge for transplant services worldwide it is essential to audit the process of organ donation. To address this, a national audit of potential organ donors was undertaken across hospitals with Intensive Care Units (N = 36). Questionnaires were returned on all patients (n = 2073) who died in these units from 1\\/9\\/07-31\\/8\\/08; 200 (10%) of these patients were considered for Brain Stem Testing (BST), 158 patients (79%) were diagnosed Brain Stem Dead (BSD) and 138 patients (87%) became potential donors. Consent for donation was given by 92 (69%) next of kin and 90 potential donors (65%) became organ donors. There was no evidence of a large number of potential organ donors being missed. Recommendations included completion of BSTs on all appropriate patients, development of support on BST, referral of all BSD patients to the Organ Procurement Service; enhanced co-ordination within hospitals and sustained information\\/education campaigns.

  14. Ozone depletion and chlorine loading potentials

    Science.gov (United States)

    Pyle, John A.; Wuebbles, Donald J.; Solomon, Susan; Zvenigorodsky, Sergei; Connell, Peter; Ko, Malcolm K. W.; Fisher, Donald A.; Stordal, Frode; Weisenstein, Debra

    1991-01-01

    The recognition of the roles of chlorine and bromine compounds in ozone depletion has led to the regulation or their source gases. Some source gases are expected to be more damaging to the ozone layer than others, so that scientific guidance regarding their relative impacts is needed for regulatory purposes. Parameters used for this purpose include the steady-state and time-dependent chlorine loading potential (CLP) and the ozone depletion potential (ODP). Chlorine loading potentials depend upon the estimated value and accuracy of atmospheric lifetimes and are subject to significant (approximately 20-50 percent) uncertainties for many gases. Ozone depletion potentials depend on the same factors, as well as the evaluation of the release of reactive chlorine and bromine from each source gas and corresponding ozone destruction within the stratosphere.

  15. Waveguide BEC Interferometry with Painted Potentials

    Science.gov (United States)

    Boshier, Malcolm; Lebedev, Vyacheslav; Samson, Carlo; Ryu, Changhyun

    2015-05-01

    Waveguide atom interferometers offer the possibility of long measurement times in a compact geometry, which can be an advantage over free space interferometers if the dephasing due to interatomic interactions can be controlled. We are investigating waveguide BEC interferometers created with the painted potential, a technique which allows for the creation and manipulation of BECs in arbitrary 2D potentials. The goal is to measure a linear acceleration of the device. The painted potential allows new approaches to the initial splitting of the BEC. For example, instead of smoothly deforming a single well potential into a double well, it is possible instead to gradually remove a weak link coupling two initially separated waveguides. This strategy should reduce excitations created in the splitting process. We are currently implementing such schemes and measuring the coherence time of the BEC after division. We will present the results of these measurements, and report progress towards measuring linear accelerations. Supported by LANL/LDRD.

  16. Puerto Rico Relative Erosion Potential (REP) - 1990

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The relative erosion potential is an indicator of sediment and pollution runoff from land based on slope, soil type, land cover (circa 1990) and (maximum monthly)...

  17. Degree of Approximation and Green Potential

    Directory of Open Access Journals (Sweden)

    M. Simkani

    2009-03-01

    Full Text Available We will relate the degree of rational approximation of a meromorphic function f to the minimum value, on the natural boundary of f, of Green potential of the weak∗ limit of the normalized pole-counting measures

  18. Potential targets for lung squamous cell carcinoma

    Science.gov (United States)

    Researchers have identified potential therapeutic targets in lung squamous cell carcinoma, the second most common form of lung cancer. The Cancer Genome Atlas (TCGA) Research Network study comprehensively characterized the lung squamous cell carcinoma gen

  19. Estimated potential for sage-grouse movement

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Estimated potential for sage-grouse movement among sage-grouse leks (Circuitscape; McRae 2006). Rescaled HSI values were used as a measure of landscape resistance

  20. Potential F-22 Raptor Export to Japan

    National Research Council Canada - National Science Library

    Bolkcom, Christopher; Chanlett-Avery, Emma

    2007-01-01

    .... interoperability with the Japanese military. Arguments against the transfer include concerns about technology proliferation, the potential for undermining regional stability, and Japan's legal and budgetary concerns about enhancing its military...

  1. Probiotics as potential antioxidants: a systematic review.

    Science.gov (United States)

    Mishra, Vijendra; Shah, Chandni; Mokashe, Narendra; Chavan, Rupesh; Yadav, Hariom; Prajapati, Jashbhai

    2015-04-15

    Probiotics are known for their health beneficial effects and are established as dietary adjuncts. Probiotics have been known for many beneficial health effects. In this view, there is interest to find the potential probiotic strains that can exhibit antioxidant properties along with health benefits. In vitro and in vivo studies indicate that probiotics exhibit antioxidant potential. In this view, consumption of probiotics alone or foods supplemented with probiotics may reduce oxidative damage, free radical scavenging rate, and modification in activity of crucial antioxidative enzymes in human cells. Incorporation of probiotics in foods can provide a good strategy to supply dietary antioxidants, but more studies are needed to standardize methods and evaluate antioxidant properties of probiotics before they can be recommended for antioxidant potential. In this paper, the literature related to known antioxidant potential of probiotics and proposing future perspectives to conduct such studies has been reviewed.

  2. The Anthropology of Potentiality in Biomedicine

    DEFF Research Database (Denmark)

    Taussig, Karen-Sue; Hoeyer, Klaus; Helmreich, Stefan

    2013-01-01

    At the beginning of the twenty-first century, potentiality serves as a central concept in the life sciences and in medical practices. This special issue of Current Anthropology explores how genes, cells, bodies, and populations as well as technologies, disciplines, and research areas become imbued...... of the ambiguity involved when dealing with that which does not (yet and may never) exist. We suggest that potentiality is both an analytic—one that has appeared explicitly and tacitly in the history of anthropology—as well as an object of study in need of further attention. To understand contemporary meanings...... and practices associated with potentiality, we must integrate an awareness of our own social scientific assumptions about potentiality with critical scrutiny of how the word and concept operate in the lives of the people we study....

  3. Potential Logistics Cost Savings from Engine Commonality

    National Research Council Canada - National Science Library

    Henderson, Robert L; Higer, Matthew W

    2007-01-01

    The purpose of this MBA Project is to determine potential logistics cost savings the USAF and DoD could have realized through the life of the F-16 fighter aircraft had they required engine commonality...

  4. Potential success factors in brand development

    DEFF Research Database (Denmark)

    Esbjerg, Lars; Grunert, Klaus G.; Poulsen, Carsten Stig

    2005-01-01

    ? This is the question we want to answer. More specifically, we want to identify potential success factors in building strong brands, understood as brands with high consumer-based brand equity. Keller (1993, p. 2) defined customer-based brand equity as "the differential effect of brand knowledge on consumer response...... of this paper is to identify potential success factors in developing strong brands and to test whether these factors can be used to discriminate between strong and weak brands. It does so through a review of the literature for potential success factors. Furthermore, to ensure that important factors have...... not been overlooked by the literature a brainstorming session with practitioners and researchers was carried out. Based on the literature and the brainstorming session, we present a list of potential success factors in brand development in the FMCG sector. To test the validity of these factors, they were...

  5. Applying a potential across a biomembrane

    DEFF Research Database (Denmark)

    Ambjörnsson, Tobias; Lomholt, Michael A; Hansen, Per Lyngs

    2007-01-01

    We investigate the effect on biomembrane mechanical properties due to the presence an external potential for a nonconductive incompressible membrane surrounded by different electrolytes. By solving the Debye-Hückel and Laplace equations for the electrostatic potential and using the relevant stress......-tensor we find (1) in the small screening length limit, where the Debye screening length is smaller than the distance between the electrodes, the screening certifies that all electrostatic interactions are short range and the major effect of the applied potential is to decrease the membrane tension...... and increase the bending rigidity; explicit expressions for electrostatic contribution to the tension and bending rigidity are derived as a function of the applied potential, the Debye screening lengths, and the dielectric constants of the membrane and the solvents. For sufficiently large voltages the negative...

  6. Puerto Rico Relative Erosion Potential (REP) - 2000

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The relative erosion potential is an indicator of sediment and pollution runoff from land based on slope, soil type, land cover (circa 2000) and (maximum monthly)...

  7. Potentially harmful excipients in neonatal medicines

    DEFF Research Database (Denmark)

    Nellis, Georgi; Metsvaht, Tuuli; Varendi, Heili

    2015-01-01

    region, GA and route of administration. Geographical region remained a significant determinant of the use of parabens, polysorbate 80, propylene glycol and saccharin sodium after adjustment for the potential covariates including anatomical therapeutic chemical class of the active ingredient. CONCLUSIONS...

  8. Potential Well Water Contaminants and Their Impacts

    Science.gov (United States)

    The first step to protect your health and the health of your family is learning about what may pollute your source of drinking water. Potential contamination may occur naturally, or as a result of human activity.

  9. Potential Phosphorus Mobilisation in Peat Soils

    DEFF Research Database (Denmark)

    Forsmann, Ditte M.; Kjærgaard, Charlotte

    2012-01-01

    Re-establishment of wetlands on peat soils containing phosphorus bound to iron(III)-oxides can lead to an undesirable phosphorus loss to the aquatic environment due to the reductive dissolution of iron(III)-oxides. Thus it is important to be able to assess the potential phosphorus mobilisation from...... peat soils before a re-establishment takes place. The potential phosphorus mobilisation from a peat soil depends not only on the geochemical characteristics but also on the redox conditions, the hydrological regime in the area as well as the hydro-physical properties of the soil. The hypothesis....... Batch experiments were used to determine the potential phosphorus release for each location. The measured phosphorus release was related to the geochemical characteristic for the respective location. Furthermore, the potential phosphorus release was compared with the measured phosphorus mobilisation...

  10. Identification of potential biomarkers in Multiple Sclerosis

    NARCIS (Netherlands)

    V. Singh (Vaibhav)

    2015-01-01

    markdownabstractAbstract Multiple sclerosis (MScl) is an inflammatory, autoimmune, demyelinating disease of the central nervous system (CNS). Thesis describes the identification of potential MScl biomarker research, with emphasis on distinguishing subtypes, first event of CNS demyelination in

  11. Evoked potentials in neuroinfections in children

    Directory of Open Access Journals (Sweden)

    V. N. Komantsev

    2013-01-01

    Full Text Available We present the results of the neurophysiological study in which 95 children with viral encephalitis and 30 children with meningitis (age from 2 up to 17 years undergo evoked potentials investigation. Some specific features of evoked potentials in neuroinfections have been shown to correlate with the course of disease and the age of the patients. We give a description of a logistic model of predicting outcomes in such patients by complex diagnostic method. We have found that evoked potentials may be successfully implemented in correcting the therapeutic strategies. Study of evoked potentials in neuroinfections in children can define the severity and extent of lesions and help to identify subclinical dysfunction and monitor the recovery processes under the therapy.

  12. Structuring the Resource Potential of Trade Enterprises

    Directory of Open Access Journals (Sweden)

    Grosul Viktoriya A.

    2013-12-01

    Full Text Available The goal of the article lies in justification of the structure of resource potential of trade enterprises on the basis of allocation of their specific features. Systemising and generalising scientific works of many scientists, the article considers resources of retail trade enterprises and reveals their branch differences. Due to requirements of the economic practice of modern enterprises, the article specifies types of intangible resources of trade enterprises and identifies their role, essence and composition in the resource potential of enterprises. In the result of the study the article justifies structuring the resource potential, which corresponds with the modern tasks of formation, development and assessment of the resource potential of trade enterprises.

  13. Therapeutic potential of fecal microbiota transplantation

    NARCIS (Netherlands)

    Smits, Loek P.; Bouter, Kristien E. C.; de Vos, Willem M.; Borody, Thomas J.; Nieuwdorp, Max

    2013-01-01

    There has been growing interest in the use of fecal microbiota for the treatment of patients with chronic gastrointestinal infections and inflammatory bowel diseases. Lately, there has also been interest in its therapeutic potential for cardiometabolic, autoimmune, and other extraintestinal

  14. Profile, antioxidant potential, and applicability of phenolic ...

    African Journals Online (AJOL)

    Aghomotsegin

    2015-10-14

    ) of Spirulina platensis and assesses their antioxidant potential, applying them as a natural conservative in minimally processed apples. The phenolic extract showed 396 µg g-1 gallic acid, 347 µg g-1 of caffeic acid, 54 µg g-1.

  15. How local is the local field potential?

    Science.gov (United States)

    Kajikawa, Yoshinao; Schroeder, Charles E

    2011-12-08

    Local field potentials (LFPs) are of growing importance in neurophysiological investigations. LFPs supplement action potential recordings by indexing activity relevant to EEG, magnetoencephalographic, and hemodynamic (fMRI) signals. Recent reports suggest that LFPs reflect activity within very small domains of several hundred micrometers. We examined this conclusion by comparing LFP, current source density (CSD), and multiunit activity (MUA) signals in macaque auditory cortex. Estimated by frequency tuning bandwidths, these signals' "listening areas" differ systematically with an order of MUA local contributions. Direct measurements indicate passive spread of LFPs to sites more than a centimeter from their origins. These findings appear to be independent of the frequency content of the LFP. Our results challenge the idea that LFP recordings typically integrate over extremely circumscribed local domains. Rather, LFPs appear as a mixture of local potentials with "volume conducted" potentials from distant sites. Copyright © 2011 Elsevier Inc. All rights reserved.

  16. Abraham Maslow: On the Potential of Women

    Science.gov (United States)

    Podeschi, Ronald L.; Podeschi, Phyllis J.

    1973-01-01

    Authors presented some principal perspectives by the psychologist, Abraham Maslow, who died in 1970, and who was writing about the potential of women long before it became popular to do so. (Author/RK)

  17. Potential For Conflict in the Spratly Islands

    National Research Council Canada - National Science Library

    Chin, Chin

    2003-01-01

    This thesis examines the potential for conflict in the Spratly Islands and determines whether the Declaration of Conduct of Parties in the South China Sea signed between China and ASEAN on November 4...

  18. Visual Evoked Potentials in Rett Syndrome

    Directory of Open Access Journals (Sweden)

    J. Gordon Millichap

    2015-11-01

    Full Text Available Investigators from the Boston Children's Hospital recorded pattern-reversal visual evoked potentials (VEPs in Mecp2 heterozygous female mice and in 34 girls with Rett syndrome (RTT.

  19. National and Sectoral GHG Mitigation Potential

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2009-07-01

    This paper compares model estimates of national and sectoral GHG mitigation potential across six key OECD GHG-emitting economies: Australia, Canada, the EU, Japan, Mexico and the US. It examines the implications of model structure, baseline and policy assumptions, and assesses GHG mitigation potential estimates across a variety of models, including models that are used to inform climate policy-makers in each of these economies.

  20. Educational Potential of Case-Study Technology

    OpenAIRE

    Fedorinova, Zoya; Vorobeva, Victoria; Malyanova, Marina

    2015-01-01

    This article presents the results of phenomenological and typological analysis of case-study technology educational potential. The definition “educational potential of case-study technology” is given, the main characteristics of which are changed in communication and collaborative activity quality, appearance of educational initiatives, change of participants’ position in learning process, formation of “collective subject” in collaborative activity, increase of learning (subject) results. Dep...

  1. Injuries In Basketball And Their Potential Prevention

    OpenAIRE

    Mocik, Antonín

    2015-01-01

    Title: Injuries In Basketball And Their Potential Prevention Objectives: The objective of my work was to define injuries which occur in basketball and to suggest prevention that can eliminate the birth of injury or speed up the convalescence. Methods: Research and comparison from foreign and Czech literature. I excerpted from literature and suggested potential prevention. Results: I ascertained that the most common injury is injury of lower limb, especially the injury of hock joint. The secon...

  2. Missing solution in a Cornell potential

    Energy Technology Data Exchange (ETDEWEB)

    Castro, L.B., E-mail: luis.castro@pgfsc.ufsc.br [Departamento de Física, CFM, Universidade Federal de Santa Catarina, 88040-900, Florianópolis - SC (Brazil); Castro, A.S. de, E-mail: castro@pq.cnpq.br [Departamento de Física e Química, Campus de Guaratinguetá, Universidade Estadual Paulista, 12516-410, Guaratinguetá - SP (Brazil)

    2013-11-15

    Missing bound-state solutions for fermions in the background of a Cornell potential consisting of a mixed scalar–vector–pseudoscalar coupling is examined. Charge-conjugation operation, degeneracy and localization are discussed. -- Highlights: •The Dirac equation with scalar–vector–pseudoscalar Cornell potential is investigated. •The isolated solution from the Sturm–Liouville problem is found. •Charge-conjugation operation, degeneracy and localization are discussed.

  3. Potentials of Exopolysaccharides from Lactic Acid Bacteria

    OpenAIRE

    Patel, Seema; Majumder, Avishek; Goyal, Arun

    2011-01-01

    Recent research in the area of importance of microbes has revealed the immense industrial potential of exopolysaccharides and their derivative oligosaccharides from lactic acid bacteria. However, due to lack of adequate technological knowledge, the exopolysaccharides have remained largely under exploited. In the present review, the enormous potentials of different types of exopolysaccharides from lactic acid bacteria are described. This also summarizes the recent advances in the applications ...

  4. Potentials of exopolysaccharides from lactic Acid bacteria.

    Science.gov (United States)

    Patel, Seema; Majumder, Avishek; Goyal, Arun

    2012-03-01

    Recent research in the area of importance of microbes has revealed the immense industrial potential of exopolysaccharides and their derivative oligosaccharides from lactic acid bacteria. However, due to lack of adequate technological knowledge, the exopolysaccharides have remained largely under exploited. In the present review, the enormous potentials of different types of exopolysaccharides from lactic acid bacteria are described. This also summarizes the recent advances in the applications of exopolysaccharides, certain problems associated with their commercial production and the remedies.

  5. Innovation Potential of the Murmansk Region

    OpenAIRE

    Atkova, Irina

    2011-01-01

    The Finnish-Russian trade relations regardless of the geographical proximity remain underdeveloped. The objective necessity to disseminate information about economic attractiveness and innovation potential of the Murmansk region in the Finnish business environment emanates from the above said. Thus, the object of the thesis project is the cross-boarder economic cooperation between Finnish Lapland and the Murmansk region, the topic being the innovational potential of the Murmansk region. The a...

  6. Leuloplakia - Review of A Potentially Malignant Disorder

    Science.gov (United States)

    Abidullah, Mohammed; Gaddikeri, Kavitha; Raghoji, Swetha; Ravishankar T, Shilpa

    2014-01-01

    Leukoplakias are oral white lesions that have not been diagnosed as any other specific disease. They are grouped under premalignant lesions, now redesignated as potentially malignant disorders. Their significance lies in the fact that they have propensity for malignant transformation at a higher rate when compared to other oral lesions. This article reviews aetiology, epidemiology, clinical characteristics, histopathologic features, malignant potential and treatment of oral leukoplakia. PMID:25302287

  7. Evidence for a weaker isovector potential

    Energy Technology Data Exchange (ETDEWEB)

    Nojarov, R. [Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)

    1996-08-01

    Estimates for a weaker isovector potential than previously adopted are put forward. It is also strongly mass and energy dependent. The resulting isovector particle-hole interaction is weaker in lighter nuclei and the isovector quadrupole resonance should be located at lower energy than previously expected. The uncertainties arising from the separation of the potential asymmetry energy in nuclear matter calculations are discussed. {copyright} {ital 1996 The American Physical Society.}

  8. Potential energy savings and thermal comfort

    DEFF Research Database (Denmark)

    Jensen, Karsten Ingerslev; Rudbeck, Claus Christian; Schultz, Jørgen Munthe

    1996-01-01

    The simulation results on the energy saving potential and influence on indoor thermal comfort by replacement of common windows with aerogel windows as well as commercial low-energy windows are described and analysed.......The simulation results on the energy saving potential and influence on indoor thermal comfort by replacement of common windows with aerogel windows as well as commercial low-energy windows are described and analysed....

  9. The effective potential of squeezed spin states

    Energy Technology Data Exchange (ETDEWEB)

    Bilge Ocak, S.; Altanhan, T

    2003-02-17

    Coherent spin states are considered through the spin operator representation in differential equation, which give quantum mechanical potentials. Squeezed spin states are defined through a canonical transformation. The defined concept of squeezed spin states has been applied to a spin system describing a magnetic system with S=1. The effective Schroedinger equation is obtained and the squeezed potential has been constructed for the model Hamiltonian. It is found that squeezing acts as a symmetry breaking process.

  10. Hydrogen utilization potential in subsurface sediments

    DEFF Research Database (Denmark)

    Adhikari, Rishi Ram; Glombitza, Clemens; Nickel, Julia

    2016-01-01

    Subsurface microbial communities undertake many terminal electron-accepting processes, often simultaneously. Using a tritium-based assay, we measured the potential hydrogen oxidation catalyzed by hydrogenase enzymes in several subsurface sedimentary environments (Lake Van, Barents Sea, Equatorial...... Pacific, and Gulf of Mexico) with different predominant electron-acceptors. Hydrogenases constitute a diverse family of enzymes expressed by microorganisms that utilize molecular hydrogen as a metabolic substrate, product, or intermediate. The assay reveals the potential for utilizing molecular hydrogen...

  11. Static three- and four-quark potentials

    CERN Document Server

    Alexandrou, C; Tsapalis, A; Forcrand, Ph.de

    2002-01-01

    We present results for the static three- and four-quark potentials in SU(3) and SU(4) respectively. Using a variational approach, combined with multi-hit for the time-like links, we determine the ground state of the baryonic string with sufficient accuracy to test the $Y-$ and $\\Delta-$ ans\\"atze for the baryonic Wilson area law. Our results favor the $\\Delta$ ansatz, where the potential is the sum of two-body terms.

  12. Biochemicalmethane potential (BMP) of solid organic substrates

    DEFF Research Database (Denmark)

    Raposo, F.; Fernández-Cegrí, V.; de la Rubia, M.A.

    2011-01-01

    BACKGROUND: This paper describes results obtained for different participating research groups in an interlaboratory study related to biochemical methane potential (BMP). In this research work, all experimental conditions influencing the test such as inoculum, substrate characteristics and experim......BACKGROUND: This paper describes results obtained for different participating research groups in an interlaboratory study related to biochemical methane potential (BMP). In this research work, all experimental conditions influencing the test such as inoculum, substrate characteristics...

  13. The Therapeutic Potential of Medicinal Foods

    OpenAIRE

    Nelvana Ramalingum; M. Fawzi Mahomoodally

    2014-01-01

    Pharmaceutical and nutritional sciences have recently witnessed a bloom in the scientific literature geared towards the use of food plants for their diversified health benefits and potential clinical applications. Health professionals now recognize that a synergism of drug therapy and nutrition might confer optimum outcomes in the fight against diseases. The prophylactic benefits of food plants are being investigated for potential use as novel medicinal remedies due to the presence of pharmac...

  14. Isoflavones as potentiators of antibacterial activity.

    Science.gov (United States)

    Morel, Cécile; Stermitz, Frank R; Tegos, George; Lewis, Kim

    2003-09-10

    Isoflavones isolated from Lupinus argenteus were found to potentiate the antibacterial activity of alpha-linolenic acid, also found in the same plant. The isoflavones also potentiated the activity of the natural plant antibiotic berberine and the synthetic fluoroquinoline antibiotic norfloxacin. The isoflavones increased the uptake of berberine into Staphylococcus aureus cells, indicating that they may be inhibiting a multidrug resistance pump (MDR). Thus, L. argenteus contains a weak antibacterial and also MDR pump inhibitors, which increase its potency.

  15. Dirac particle in a pseudoscalar potential

    Energy Technology Data Exchange (ETDEWEB)

    Moreno, M. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Ap. Postal 20-364, 01000 (Mexico), D.F.; Zentella-Dehesa, A. [Departamento de Fisicoquimica, Intituto de Quimica, UNAM Ap. Postal 70-213, 04510 (Mexico), D.F.

    1996-02-01

    We study the problem of a Dirac particle with a pseudoscalar interaction in the potential approximation. It is shown how nonperturbative relativistic solutions arise. The case of the central pseudoscalar potential is explicitly worked out also in a closed form. The angular functions are worked out in general for this central case. Finally for the special case of the spherical well the radial solutions are shown to behave like Bessel-type functions. {copyright} {ital 1996 American Institute of Physics.}

  16. Labour potential in the context of alienation

    OpenAIRE

    Filippova, Irina

    2012-01-01

    Labour potential of the community is a complex system of the elements such as the labor power of demographic system and the institutional capacity of social system. The institutional capacity provides the division of labor and integration of individuals in the process of social production. The way of system integration of the individuals in public production defines the labour potential of the community. The paper presents an analytic formulation of the problem of social division of labor tak...

  17. Tracing the gravitational potential using cosmic voids

    Science.gov (United States)

    Nadathur, Seshadri; Hotchkiss, Shaun; Crittenden, Robert

    2017-06-01

    The properties of large underdensities in the distribution of galaxies in the Universe, known as cosmic voids, are potentially sensitive probes of fundamental physics. We use data from the MultiDark suite of N-body simulations and multiple halo occupation distribution mocks to study the relationship between galaxy voids, identified using a watershed void-finding algorithm, and the gravitational potential Φ. We find that the majority of galaxy voids correspond to local density minima in larger scale overdensities, and thus lie in potential wells. However, a subset of voids can be identified that closely trace maxima of the gravitational potential and thus stationary points of the velocity field. We identify a new void observable, λv, which depends on a combination of the void size and the average galaxy density contrast within the void, and show that it provides a good proxy indicator of the potential at the void location. A simple linear scaling of Φ as a function of λv is found to hold, independent of the redshift and properties of the galaxies used as tracers of voids. We provide an accurate fitting formula to describe the spherically averaged potential profile Φ(r) about void centre locations. We discuss the importance of these results for the understanding of the evolution history of voids, and for their use in precision measurements of the integrated Sachs-Wolfe effect, gravitational lensing and peculiar velocity distortions in redshift space.

  18. Hydrogen utilization potential in subsurface sediments

    Directory of Open Access Journals (Sweden)

    Rishi Ram Adhikari

    2016-01-01

    Full Text Available Subsurface microbial communities undertake many terminal electron-accepting processes, often simultaneously. Using a tritium-based assay, we measured the potential hydrogen oxidation catalyzed by hydrogenase enzymes in several subsurface sedimentary environments (Lake Van, Barents Sea, Equatorial Pacific and Gulf of Mexico with different predominant electron-acceptors. Hydrogenases constitute a diverse family of enzymes expressed by microorganisms that utilize molecular hydrogen as a metabolic substrate, product or intermediate. The assay reveals the potential for utilizing molecular hydrogen and allows qualitative detection of microbial activity irrespective of the predominant electron-accepting process. Because the method only requires samples frozen immediately after recovery, the assay can be used for identifying microbial activity in subsurface ecosystems without the need to preserve live material.We measured potential hydrogen oxidation rates in all samples from multiple depths at several sites that collectively span a wide range of environmental conditions and biogeochemical zones. Potential activity normalized to total cell abundance ranges over five orders of magnitude and varies, dependent upon the predominant terminal electron acceptor. Lowest per-cell potential rates characterize the zone of nitrate reduction and highest per-cell potential rates occur in the methanogenic zone. Possible reasons for this relationship to predominant electron acceptor include (i increasing importance of fermentation in successively deeper biogeochemical zones and (ii adaptation of H2ases to successively higher concentrations of H2 in successively deeper zones.

  19. Hydrogen Utilization Potential in Subsurface Sediments.

    Science.gov (United States)

    Adhikari, Rishi R; Glombitza, Clemens; Nickel, Julia C; Anderson, Chloe H; Dunlea, Ann G; Spivack, Arthur J; Murray, Richard W; D'Hondt, Steven; Kallmeyer, Jens

    2016-01-01

    Subsurface microbial communities undertake many terminal electron-accepting processes, often simultaneously. Using a tritium-based assay, we measured the potential hydrogen oxidation catalyzed by hydrogenase enzymes in several subsurface sedimentary environments (Lake Van, Barents Sea, Equatorial Pacific, and Gulf of Mexico) with different predominant electron-acceptors. Hydrogenases constitute a diverse family of enzymes expressed by microorganisms that utilize molecular hydrogen as a metabolic substrate, product, or intermediate. The assay reveals the potential for utilizing molecular hydrogen and allows qualitative detection of microbial activity irrespective of the predominant electron-accepting process. Because the method only requires samples frozen immediately after recovery, the assay can be used for identifying microbial activity in subsurface ecosystems without the need to preserve live material. We measured potential hydrogen oxidation rates in all samples from multiple depths at several sites that collectively span a wide range of environmental conditions and biogeochemical zones. Potential activity normalized to total cell abundance ranges over five orders of magnitude and varies, dependent upon the predominant terminal electron acceptor. Lowest per-cell potential rates characterize the zone of nitrate reduction and highest per-cell potential rates occur in the methanogenic zone. Possible reasons for this relationship to predominant electron acceptor include (i) increasing importance of fermentation in successively deeper biogeochemical zones and (ii) adaptation of H2ases to successively higher concentrations of H2 in successively deeper zones.

  20. Revisiting the argument from fetal potential

    Directory of Open Access Journals (Sweden)

    Manninen Bertha

    2007-05-01

    Full Text Available Abstract One of the most famous, and most derided, arguments against the morality of abortion is the argument from potential, which maintains that the fetus' potential to become a person and enjoy the valuable life common to persons, entails that its destruction is prima facie morally impermissible. In this paper, I will revisit and offer a defense of the argument from potential. First, I will criticize the classical arguments proffered against the importance of fetal potential, specifically the arguments put forth by philosophers Peter Singer and David Boonin, by carefully unpacking the claims made in these arguments and illustrating why they are flawed. Secondly, I will maintain that fetal potential is morally relevant when it comes to the morality of abortion, but that it must be accorded a proper place in the argument. This proper place, however, cannot be found until we first answer a very important and complex question: we must first address the issue of personal identity, and when the fetus becomes the type of being who is relevantly identical to a future person. I will illustrate why the question of fetal potential can only be meaningfully addressed after we have first answered the question of personal identity and how it relates to the human fetus.

  1. Enterprise Potential, Entrepreneurial Intentions and Envy

    Directory of Open Access Journals (Sweden)

    Edit Terek

    2017-06-01

    Full Text Available This paper presents the results of research about the impact of envy on enterprise potential and entrepreneurial intentions. The research was conducted in Serbia and the respondents were students from 5 faculties, from the first to the fifth year of study. The results were gained by statistical analysis of the gathered information (380 completed questionnaires. Descriptive, correlation and regression analysis are the methods of statistical analysis that were used. From the dimensions of enterprise potential, the highest average value has the dimension Creativity, while from the dimensions of entrepreneurial intentions, the highest average value has the dimension Subjective norm. Of all the observed dimensions, the lowest value has the Envy dimension. Between envy and dimensions of enterprise potential and dimensions of entrepreneurial intentions, there are a number of statistically significant negative correlations. This is more prevalent at the dimension of entrepreneurial intentions. Feelings of inferiority in relation to other people and the perception of having a boring or a bad life have an especially negative impact on entrepreneurial potential and intentions. Envy, which occurs due to the desire for more entertainment, travel, and due to the perception of the lack of fortune, also has a negative impact on entrepreneurial potential and intentions, but the influence is considerably weaker. There is a statistically significant predictive effect of certain items of envy on enterprise potential dimensions and entrepreneurial intentions dimensions. But this fact is not so strongly expressed. Some results suggest the possibility (however small that envy, in some circumstances, can mildly encourage entrepreneurial intention.

  2. Fixman compensating potential for general branched molecules

    Energy Technology Data Exchange (ETDEWEB)

    Jain, Abhinandan, E-mail: Abhi.Jain@jpl.nasa.gov [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109 (United States); Kandel, Saugat; Wagner, Jeffrey; Larsen, Adrien; Vaidehi, Nagarajan, E-mail: nvaidehi@coh.org [Division of Immunology, Beckman Research Institute of the City of Hope, Duarte, California 91010 (United States)

    2013-12-28

    The technique of constraining high frequency modes of molecular motion is an effective way to increase simulation time scale and improve conformational sampling in molecular dynamics simulations. However, it has been shown that constraints on higher frequency modes such as bond lengths and bond angles stiffen the molecular model, thereby introducing systematic biases in the statistical behavior of the simulations. Fixman proposed a compensating potential to remove such biases in the thermodynamic and kinetic properties calculated from dynamics simulations. Previous implementations of the Fixman potential have been limited to only short serial chain systems. In this paper, we present a spatial operator algebra based algorithm to calculate the Fixman potential and its gradient within constrained dynamics simulations for branched topology molecules of any size. Our numerical studies on molecules of increasing complexity validate our algorithm by demonstrating recovery of the dihedral angle probability distribution function for systems that range in complexity from serial chains to protein molecules. We observe that the Fixman compensating potential recovers the free energy surface of a serial chain polymer, thus annulling the biases caused by constraining the bond lengths and bond angles. The inclusion of Fixman potential entails only a modest increase in the computational cost in these simulations. We believe that this work represents the first instance where the Fixman potential has been used for general branched systems, and establishes the viability for its use in constrained dynamics simulations of proteins and other macromolecules.

  3. Membrane potential in multi-ionic mixtures.

    Science.gov (United States)

    Lanteri, Y; Szymczyk, A; Fievet, P

    2009-07-09

    The membrane potential arising through charged porous membranes separating electrolyte mixtures at identical hydrostatic pressures but different concentrations was investigated theoretically by means of the steric, electric, and dielectric exclusion (SEDE) model. Transport phenomena were described through the Nernst-Planck formalism, while ion partitioning at the membrane/solution interfaces was accounted for by means of modified Donnan equations including steric and dielectric effects. The high concentration limit of the membrane potential depends on the mixture composition and the pore size as well. A specific feature of membrane potential in multi-ionic systems is the dependence at high concentration on the effective dielectric constant of the solution confined inside pores. Indeed, the effective dielectric constant inside pores does not affect the high concentration limit of the membrane potential in the case of single salt solutions. The low concentration limit of the membrane potential is independent of the mixture composition, the effective dielectric constant inside pores, and the pore radius, but it is ruled by counterions with the highest charge number. The membrane potential measured at high salt concentration with single salt solutions and electrolyte mixtures could be used to determine the pore size and the effective dielectric constant inside pores, respectively. This may constitute an alternative way for membrane characterization with the advantage of avoiding the need for additional rejection rate measurements.

  4. Constraints for the thawing and freezing potentials

    Science.gov (United States)

    Hara, Tetsuya; Suzuki, Anna; Saka, Shogo; Tanigawa, Takuma

    2018-01-01

    We study the accelerating present universe in terms of the time evolution of the equation of state w(z) (redshift z) due to thawing and freezing scalar potentials in the quintessence model. The values of dw/da and d^2w/da^2 at a scale factor of a = 1 are associated with two parameters of each potential. For five types of scalar potentials, the scalar fields Q and w as functions of time t and/or z are numerically calculated under the fixed boundary condition of w(z=0)=-1+Δ. The observational constraint w_obs (Planck Collaboration, arXiv:1502.01590) is imposed to test whether the numerical w(z) is in w_obs. Some solutions show thawing features in the freezing potentials. Mutually exclusive allowed regions in the dw/da vs. d^2w/da^2 diagram are obtained in order to identify the likely scalar potential and even the potential parameters for future observational tests.

  5. Development of empirical potentials for amorphous silica

    Energy Technology Data Exchange (ETDEWEB)

    Carre, A.

    2007-09-15

    Amorphous silica (SiO{sub 2}) is of great importance in geoscience and mineralogy as well as a raw material in glass industry. Its structure is characterized as a disordered continuous network of SiO{sub 4} tetrahedra. Many efforts have been undertaken to understand the microscopic properties of silica by classical molecular dynamics (MD) simulations. In this method the interatomic interactions are modeled by an effective potential that does not take explicitely into account the electronic degrees of freedom. In this work, we propose a new methodology to parameterize such a potential for silica using ab initio simulations, namely Car-Parrinello (CP) method [Phys. Rev. Lett. 55, 2471 (1985)]. The new potential proposed is compared to the BKS potential [Phys. Rev. Lett. 64, 1955 (1990)] that is considered as the benchmark potential for silica. First, CP simulations have been performed on a liquid silica sample at 3600 K. The structural features so obtained have been compared to the ones predicted by the classical BKS potential. Regarding the bond lengths the BKS tends to underestimate the Si-O bond whereas the Si-Si bond is overestimated. The inter-tetrahedral angular distribution functions are also not well described by the BKS potential. The corresponding mean value of the SiOSi angle is found to be {approx_equal} 147 , while the CP yields to a SiOSi angle centered around 135 . Our aim is to fit a classical Born-Mayer/Coulomb pair potential using ab initio calculations. To this end, we use the force-matching method proposed by Ercolessi and Adams [Europhys. Lett. 26, 583 (1994)]. The CP configurations and their corresponding interatomic forces have been considered for a least square fitting procedure. The classical MD simulations with the resulting potential have lead to a structure that is very different from the CP one. Therefore, a different fitting criterion based on the CP partial pair correlation functions was applied. Using this approach the resulting

  6. Screening action potentials: The power of light

    Directory of Open Access Journals (Sweden)

    Lars eKaestner

    2011-07-01

    Full Text Available Action potentials reflect the concerted activity of all electrogenic constituents in the plasma membrane during the excitation of a cell. Therefore, the action potential is an integrated readout and a promising parameter to detect electrophysiological failures or modifications thereof in diagnosis as well as in drug screens. Cellular action potentials can be recorded by optical approaches. To fulfill the pre-requirements to scale up for e.g. pharmacological screens the following preparatory work has to be provided: (i model cells under investigation need to represent target cells in the best possible manner; (ii optical sensors that can be either small molecule dyes or genetically encoded potential probes need to provide a reliable readout with minimal interaction with the naive behavior of the cells and (iii devices need to be capable to stimulate the cells, read out the signals with the appropriate speed as well as provide the capacity for a sufficient throughput. Here we discuss several scenarios for all three categories in the field of cardiac physiology and pharmacology and provide a perspective to use the power of light in screening cardiac action potentials.

  7. Potential targets for the treatment of preeclampsia.

    Science.gov (United States)

    Oyston, Charlotte J; Stanley, Joanna L; Baker, Philip N

    2015-01-01

    Preeclampsia is a disorder of pregnancy, typically characterized by hypertension and proteinuria observed after the 20th week of gestation. Preeclampsia has dire consequences for both maternal and neonatal health: it is associated with 50,000 - 100,000 annual deaths globally, as well as serious fetal and neonatal morbidity and mortality, including increased risk of fetal growth restriction and still birth. Despite the severe health, social, and economic costs of preeclampsia, currently the only curative therapy is delivery of the baby and placenta, which itself carries the associated risks of premature birth. The lack of treatments for this condition is attributable to a number of causes, including but not limited to: a partial understanding of the complex pathophysiological mechanisms underlying this complex disease; an inability to sensitively predict women who will go on to develop the disease; and a paucity of robust animal models with which to test new treatments. Recently, progress has been made in identifying potential new therapeutic targets. This review will discuss in detail the evidence supporting further investigation of these targets, which include angiogenic factors, agents that increase vasodilation, anti-inflammatory drugs, substances that reduce oxidative stress, and statins. New therapeutic targets have the potential to make a significant positive impact on maternal and neonatal health. It is exciting that a number of potential therapies are currently being investigated; however, it is also vital that basic research continues to identify potential mechanisms and targets, and that any potential therapy is thoroughly tested before progression to clinical trial.

  8. Spacecraft potential control for Double Star

    Directory of Open Access Journals (Sweden)

    K. Torkar

    2005-11-01

    Full Text Available The spacecraft potential of Double Star TC-1 is positive in large parts of the orbits due to the photo-effect from solar EUV irradiation. These positive potentials typically disturb low energy plasma measurements on board. The potential can be reduced, and thereby the particle measurements improved, by emitting a positive ion beam. This method has successfully been applied on several other spacecraft and it has also been chosen for TC-1. The instrument TC-1/ASPOC is a derivative of the Cluster/ASPOC instruments, from which it has inherited many features. The paper describes the adaptations and further developments made for the ion emitters and the electronics. The instrument performs very well and can support higher beam currents than on Cluster. The expected significant improvement of the low energy particle measurements on board was indeed observed. The modifications of the electron distributions are analysed for a one-time interval when the spacecraft was located in the magnetosheath. The change in the potential due to the ion beam was determined, and first studies of the 3-D electron distributions in response to the spacecraft potential control have been performed, which indicate that the method works as expected.

  9. Logistics potentials in business competitive advantage creation

    Directory of Open Access Journals (Sweden)

    Rafał Matwiejczuk

    2013-12-01

    Full Text Available Background: Companies constantly search for ways to achieve and sustain long-term competitive advantage. Among the factors influencing the competitive advantage creation there are so called logistics potentials, which constitute a component part of a business strategic potentials. Logistics resources, logistics capabilities and logistics competences are the main components of the logistics potentials structure and hierarchy. Methods: In order to recognize the logistics potentials which determine the competitive advantage creation one may use the assumptions and elements of contemporary management concepts, including strategic management. In particular the article deals with Resource-Based View (RBV, Dynamic Capabilities Concept (DCC and - first of all - Competence-Based Management (CBM. Results and conclusions: Several significant research projects have presented a wide scope and a large number of possibilities of logistics potentials (and logistics competences in particular influence on business competitive advantage creation. The article briefly presents the research results conducted by: (1 Michigan State University (USA, (2 European Logistics Association (ELA in cooperation with A.T. Kearney, (3 Computer Sciences Corporation and (4 Capgemini. The research results have pointed out to differentiated but at the same distinctive symptoms of logistics competences influence on competitive advantage creation. The article also refers to the results of the research carried out by the Chair of Logistics & Marketing at Opole University (Poland in companies operating in Poland. The research has been mainly dealing with the significance of logistics competences in competitive advantage creation.

  10. Perspective: Machine learning potentials for atomistic simulations

    Science.gov (United States)

    Behler, Jörg

    2016-11-01

    Nowadays, computer simulations have become a standard tool in essentially all fields of chemistry, condensed matter physics, and materials science. In order to keep up with state-of-the-art experiments and the ever growing complexity of the investigated problems, there is a constantly increasing need for simulations of more realistic, i.e., larger, model systems with improved accuracy. In many cases, the availability of sufficiently efficient interatomic potentials providing reliable energies and forces has become a serious bottleneck for performing these simulations. To address this problem, currently a paradigm change is taking place in the development of interatomic potentials. Since the early days of computer simulations simplified potentials have been derived using physical approximations whenever the direct application of electronic structure methods has been too demanding. Recent advances in machine learning (ML) now offer an alternative approach for the representation of potential-energy surfaces by fitting large data sets from electronic structure calculations. In this perspective, the central ideas underlying these ML potentials, solved problems and remaining challenges are reviewed along with a discussion of their current applicability and limitations.

  11. Research of photoinduced potentials of pepper leaves

    Directory of Open Access Journals (Sweden)

    D. V. Chernetchenko

    2015-09-01

    Full Text Available Bioelectrical potentials of the plants during photostimulation with various intensity values and wave lengths are studied. Suchstimulation provides light-dependent reactions of photosynthesis. The universal scheme of registration of bioelectric potentials, which allowsto carry out the experimental study of light stimuli effect on the plant is proposed. All registrations of potentials are observed on the pepper leaves. Photoinduced stimuli are different with intensity changed from 150 to 450 lux and different spectrums of white light and red light with wave length 690 nm. Different parameters of stimuli drive to different types of biopotentials of the plant, quantitative and qualitative relationships of this process are obtained. It is also found that bioelectrical reaction of the leaves is quantitatively different in various spectral ranges of light, but the quality remains the same for all cases, as shown in the study of bioelectric responses during exposure to the light in red spectrum range. The explanation of the additional depolarization phase that occurs during the running of dark reparative process of photosynthesis is given. Light-dependent reactions of photosynthesis are accompanied by significant changes in the electrical potential of chloroplasts’ membrane. Besides, the dependence of bioelectrical reaction of the plant on different spectra of light is found. By this way, biophysical relation of plant potentials to the intracellular biophysical mechanisms during photo stimulation is obtained.

  12. THE INTEGRATION AND INVESTMENT POTENTIAL OF BRICS

    Directory of Open Access Journals (Sweden)

    Sidorova E. A.

    2016-06-01

    Full Text Available In the modern global economy international integration associations are full subjects of it. However, the changing world is changing the integration inquiry: there is the transformation of the integration processes because of globalization. A key principle of the integration process is to accelerate the economic development of the system and its individual composes through the implementation of the integration potential. In this regard, the article researches the integration potential of BRICS (an informal association consists of Brazil, Russia, India, China and South Africa as a significant subject of the world economy, including it analyzes trade flows of these countries using the index method. Moreover, it researches the investment potential of BRICS as the part of the integration potential. Finally, it focuses on the association institutionalization in the monetary sphere. Research has shown that the integration potential of BRICS opens new prospects for cooperation and development of the member countries. At the same time the creation of new financial institutions in the framework of the association (in particular, the New Development Bank and the Contingent Reserve Arrangement can help to strengthen the cooperation among the countries and to promote more representative global governance.

  13. Energy dependence of nonlocal optical potentials

    Science.gov (United States)

    Lovell, A. E.; Bacq, P.-L.; Capel, P.; Nunes, F. M.; Titus, L. J.

    2017-11-01

    Recently, a variety of studies have shown the importance of including nonlocality in the description of reactions. The goal of this work is to revisit the phenomenological approach to determining nonlocal optical potentials from elastic scattering. We perform a χ2 analysis of neutron elastic scattering data off 40Ca, 90Zr, and 208Pb at energies E ≈5 -40 MeV, assuming a Perey and Buck [Nucl. Phys. 32, 353 (1962), 10.1016/0029-5582(62)90345-0] or Tian et al. [Int. J. Mod. Phys. E 24, 1550006 (2015), 10.1142/S0218301315500068] nonlocal form for the optical potential. We introduce energy and asymmetry dependencies in the imaginary part of the potential and refit the data to obtain a global parametrization. Independently of the starting point in the minimization procedure, an energy dependence in the imaginary depth is required for a good description of the data across the included energy range. We present two parametrizations, both of which represent an improvement over the original potentials for the fitted nuclei as well as for other nuclei not included in our fit. Our results show that, even when including the standard Gaussian nonlocality in optical potentials, a significant energy dependence is required to describe elastic-scattering data.

  14. Diagnostics of the Enterprise Export Potential

    Directory of Open Access Journals (Sweden)

    Skrynkovskyy Ruslan M.

    2016-11-01

    Full Text Available The aim of the article is to form and develop theoretical and methodological foundations for diagnostics of the enterprise export potential, which should be understood as a process of identification, analysis and assessment of the level of potential possibility and readiness of the enterprise to implement export activities taking into account the impact of interrelated internal variables (goals, technology, structure, tasks, educational and professional potential of the staff and factors of the enterprise external environment (customers, competitors, suppliers, intermediaries, contact audience, etc. in order to ensure a qualitatively new level of its development and formation of its prospects. It is determined that the key business indicators of the system for diagnostics of enterprise export potential are: the level of enterprises competitiveness in the international (global market; the level of competitiveness of enterprise products; the level of competitiveness of enterprise export products; the level of enterprise resource opportunities; the level of enterprise export performance. Prospects for further research in this direction are to develop a classification (specifically detailed list of objectives of the enterprise diagnostics by the level of detail (element, partial, complex, taking into account diagnostics of export potential of the enterprise as part of diagnostic objective.

  15. Effects of non-Abelian gauge potentials

    Energy Technology Data Exchange (ETDEWEB)

    Jacob, Andreas; Santos, Luis [Institut fuer Theoretische Physik, Leibniz Universitaet, Hannover (Germany); Merkl, Michael; Zimmer, Frank; Oehberg, Patrik [SUPA, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh (United Kingdom)

    2009-07-01

    Artificial electromagnetism may be created for neutral atoms, e.g. by rotating the gas. Other forms of inducing artificial electromagnetism are possible, including ways of generating non-Abelian vector potentials. In this talk, we first discuss simple laser setups that allow the creation of non-Abelian gauge potentials for atoms with a tripod level scheme. We comment on specific experimental implementations in e.g. {sup 4}He{sup *} and {sup 87}Rb. In particular we discuss a simple laser arrangement that generates a non-Abelian vector potential proportional to the Pauli matrices. This gauge potential induces a quasi-relativistic physics for cold gases similar to that in graphene, including the possibility of observation of metamaterial phenomena as Veselago lensing. We shall discuss in particular the effects of this gauge potential in the linear and nonlinear atom optics of condensates, including the possibility of creating regions of negative mass in the dispersion relation which allow for bright solitons in the presence of repulsive interactions.

  16. Electronic Quantum Confinement in Cylindrical Potential Well

    CERN Document Server

    Baltenkov, A S

    2016-01-01

    The effects of quantum confinement on the momentum distribution of electrons confined within a cylindrical potential well have been analyzed. The motivation is to understand specific features of the momentum distribution of electrons when the electron behavior is completely controlled by the parameters of a non-isotropic potential cavity. It is shown that studying the solutions of the wave equation for an electron confined in a cylindrical potential well offers the possibility to analyze the confinement behavior of an electron executing one- or two-dimensional motion in the three-dimensional space within the framework of the same mathematical model. Some low-lying electronic states with different symmetries have been considered and the corresponding wave functions have been calculated; the behavior of their nodes and their peak positions with respect to the parameters of the cylindrical well has been analyzed. Additionally, the momentum distributions of electrons in these states have been calculated. The limi...

  17. Boltzmann equation with double-well potentials

    Science.gov (United States)

    Chiacchiera, Silvia; Macrı, Tommaso; Trombettoni, Andrea

    2016-10-01

    We study the dynamics of an interacting classical gas trapped in a double-well potential at finite temperature. Two model potentials are considered: a cubic box with a square barrier in the middle, and a harmonic trap with a Gaussian barrier along one direction. The study is performed using the Boltzmann equation, solved numerically via the test-particle method. We introduce and discuss a simple analytical model that allows one to provide estimates of the relaxation time, which are compared with numerical results. Finally, we use our findings to make numerical and analytical predictions for the case of a fermionic mixture in the normal-fluid phase in a realistic double-well potential relevant for experiments with cold atoms.

  18. Crystallization for a Brenner-like Potential

    Science.gov (United States)

    Farmer, Brittan; Esedoǧlu, Selim; Smereka, Peter

    2017-02-01

    Graphene is a carbon molecule with the structure of a honeycomb lattice. We show how this structure can arise in two dimensions as the minimizer of an interaction energy with two-body and three-body terms. In the engineering literature, the Brenner potential is commonly used to describe the interactions between carbon atoms. We consider a potential of Stillinger-Weber type that incorporates certain characteristics of the Brenner potential: the preferred bond angles are 180° and all interactions have finite range. We show that the thermodynamic limit of the ground state energy per particle is the same as that of a honeycomb lattice. We also prove that, subject to periodic boundary conditions, the minimizers are translated versions of the honeycomb lattice.

  19. Resistive Ferroresonance Limiter for Potential Transformers

    Directory of Open Access Journals (Sweden)

    Hamid Radmanesh

    2012-01-01

    Full Text Available The ferroresonance or nonlinear resonance is a complex phenomenon, which may cause overvoltage in the electrical power system and endangers the system reliability and operation. The ability to predict the ferroresonance in the transformer depends on the accuracy of the transformer model used. In this paper, the effect of the new suggested ferroresonance limiter on the control of the chaotic ferroresonance and duration of chaotic transients in a potential transformer including nonlinear core losses is studied. To study the proposed ferroresonance limiter, a single phase 100 VA, 275 kV potential transformer is simulated. The magnetization characteristic of the potential transformer is modeled by a single-value two-term polynomial. The core losses are modeled by third order power series in terms of voltage and include core nonlinearities. The simulation results show that the ferroresonance limiter has a considerable effect on the ferroresonance overvoltage.

  20. Potentiometric Measurements of Semiconductor Nanocrystal Redox Potentials.

    Science.gov (United States)

    Carroll, Gerard M; Brozek, Carl K; Hartstein, Kimberly H; Tsui, Emily Y; Gamelin, Daniel R

    2016-04-06

    A potentiometric method for measuring redox potentials of colloidal semiconductor nanocrystals (NCs) is described. Fermi levels of colloidal ZnO NCs are measured in situ during photodoping, allowing correlation of NC redox potentials and reduction levels. Excellent agreement is found between electrochemical and optical redox-indicator methods. Potentiometry is also reported for colloidal CdSe NCs, which show more negative conduction-band-edge potentials than in ZnO. This difference is highlighted by spontaneous electron transfer from reduced CdSe NCs to ZnO NCs in solution, with potentiometry providing a measure of the inter-NC electron-transfer driving force. Future applications of NC potentiometry are briefly discussed.

  1. Bioenergy Potential from Food Waste in California

    Energy Technology Data Exchange (ETDEWEB)

    Breunig, Hanna M. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area; Jin, Ling [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area; Robinson, Alastair [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area; Scown, Corinne D. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Energy Technologies Area; Joint BioEnergy Inst. (JBEI), Emeryville, CA (United States)

    2017-01-25

    This paper presents the first detailed analysis of monthly food waste generation in California at a county level, and its potential contribution to the state's energy production. Scenarios that rely on excess capacity at existing anaerobic digester (AD) and solid biomass combustion facilities, and alternatives that allow for new facility construction, are developed and modeled. Potential monthly electricity generation from the conversion of gross food waste using a combination of AD and combustion varies from 420 to 700 MW, averaging 530 MW. At least 66% of gross high moisture solids and 23% of gross low moisture solids can be treated using existing county infrastructure, and this fraction increases to 99% of high moisture solids and 55% of low moisture solids if waste can be shipped anywhere within the state. Biogas flaring practices at AD facilities can reduce potential energy production by 10 to 40%.

  2. Potential priority pollutants in sewage sludge

    DEFF Research Database (Denmark)

    Eriksson, Eva; Christensen, Nina; Schmidt, Jens Ejbye

    2008-01-01

    compounds (XOCs) present in the sludge. Application on land used for agriculture is, therefore, not socially acceptable in some countries, e.g., Sweden. In this study, literature reviews showed that 541 XOCs potentially could be present in sewage sludge due to their presence in e.g. construction materials......, pharmaceuticals, personal care products etc. 192 compounds have been quantified in sewage sludge, which indicate that, although many XOCs have been measured in sludge, there are potentially a vast number of compounds present that have not been analyzed for yet. In a hazard identification of the quantified...... assessing sludge quality. They were compared with European legislations and discussed in regard for pointing out the need for mitigation such as substitution. Furthermore, the potential need for implementation of sludge treatment trains in order to meet the society's needs was addressed....

  3. Electric potential microelectrode for studies of electrobiogeophysics

    DEFF Research Database (Denmark)

    Damgaard, Lars Riis; Risgaard-Petersen, Nils; Nielsen, Lars Peter

    2014-01-01

    increase by approximately 2mV from the sediment-water interface to a depth of approximately 20mm, in accordance with the location and direction of the electric currents estimated from oxygen, pH, and H2S microprofiles. The EPM also captured emergence and decay of electric diffusion potentials......Spatially separated electron donors and acceptors in sediment can be exploited by the so-called “cable bacteria.” Electric potential microelectrodes (EPMs) were constructed to measure the electric fields that should appear when cable bacteria conduct electrons over centimeter distances. The EPMs...... were needle-shaped, shielded Ag/AgCl half-cells that were rendered insensitive to redox-active species in the environment. Tip diameters of 40 to 100 μm and signal resolution of approximately 10 μV were achieved. A test in marine sediments with active cable bacteria showed an electric potential...

  4. Offshore wind energy potential in China

    DEFF Research Database (Denmark)

    Hong, Lixuan; Möller, Bernd

    2011-01-01

    This paper investigates available offshore wind energy resources in China’s exclusive economic zone (EEZ) with the aid of a Geographical Information System (GIS), which allows the influence of technical, spatial and economic constraints on offshore wind resources being reflected in a continuous...... space. Geospatial supply curves and spatial distribution of levelised production cost (LPC) are developed, which provide information on the available potential of offshore wind energy at or below a given cost, and its corresponding geographical locations. The GIS-based models also reflect the impacts...... of each spatial constraint as well as various scenarios of spatial constraints on marginal production costs of offshore wind energy. Furthermore, the impacts of differing Feed-in-tariff (FIT) standards on the economic potential are calculated. It confirms that economic potential of offshore wind energy...

  5. Functionalized carbon nanotubes for potential medicinal applications.

    Science.gov (United States)

    Zhang, Yi; Bai, Yuhong; Yan, Bing

    2010-06-01

    Functionalized carbon nanotubes display unique properties that enable a variety of medicinal applications, including the diagnosis and treatment of cancer, infectious diseases and central nervous system disorders, and applications in tissue engineering. These potential applications are particularly encouraged by their ability to penetrate biological membranes and relatively low toxicity. High aspect ratio, unique optical property and the likeness as small molecule make carbon nanotubes an unusual allotrope of element carbon. After functionalization, carbon nanotubes display potentials for a variety of medicinal applications, including the diagnosis and treatment of cancer, infectious diseases and central nervous system disorders, and applications in tissue engineering. These potential applications are particularly encouraged by their ability to penetrate biological membranes and relatively low toxicity. (c) 2010 Elsevier Ltd. All rights reserved.

  6. Electromagnetic fields from two potential fields

    Science.gov (United States)

    Chauca, J.; Doria, R.; Soares, W.

    2012-10-01

    Maxwell electromagnetism is generalized through a model that includes N-potential fields in a same group. Anew rule for the photon field is defined from a fourth interpretation to the light invariance. It becomes a directive particle while others potential fields appears as circumstance particles. Its most primitive coupling is not more with electric charge but with the Noether systemic charge. Studying the case with two potential fields, one derives the corresponding granular and collective electromagnetic fields with antisymmetric and symmetric nature. As a first feature, differently from Maxwell equation such systemic photon field does not follow the expression inversely proportional to the distance. This work calculates the subsequent branch of elecromagnetic fields {→EI-→BI,→e-→b;ɛI,→ɛI,βIij,s,→s,sij}.

  7. Renormalization group flow of the Higgs potential

    Science.gov (United States)

    Gies, Holger; Sondenheimer, René

    2018-01-01

    We summarize results for local and global properties of the effective potential for the Higgs boson obtained from the functional renormalization group, which allows one to describe the effective potential as a function of both scalar field amplitude and renormalization group scale. This sheds light onto the limitations of standard estimates which rely on the identification of the two scales and helps in clarifying the origin of a possible property of meta-stability of the Higgs potential. We demonstrate that the inclusion of higher-dimensional operators induced by an underlying theory at a high scale (GUT or Planck scale) can relax the conventional lower bound on the Higgs mass derived from the criterion of absolute stability. This article is part of the Theo Murphy meeting issue `Higgs cosmology'.

  8. Potential of Natural Ventilation in Shopping Centres

    DEFF Research Database (Denmark)

    Diederichsen, Alice; Friis, Kristina; Brohus, Henrik

    2008-01-01

    The indoor environmental quality (IEQ) is a fundamental requirement for a well performing shopping centre. This paper contains a pilot study of the potential of using hybrid ventilation (a combination of automatically controlled natural and mechanical ventilation - respectively NV and MV) in shop......The indoor environmental quality (IEQ) is a fundamental requirement for a well performing shopping centre. This paper contains a pilot study of the potential of using hybrid ventilation (a combination of automatically controlled natural and mechanical ventilation - respectively NV and MV......) in shopping centres with focus on both the achieved IEQ and energy consumptions for air movement. By thermal building simulations it is found that there exists an interesting potential for hybrid ventilation of shopping centres, which can lead to great savings in the electrical energy consumptions...

  9. Electrically tunable artificial gauge potential for polaritons

    Science.gov (United States)

    Lim, Hyang-Tag; Togan, Emre; Kroner, Martin; Miguel-Sanchez, Javier; Imamoğlu, Atac

    2017-02-01

    Neutral particles subject to artificial gauge potentials can behave as charged particles in magnetic fields. This fascinating premise has led to demonstrations of one-way waveguides, topologically protected edge states and Landau levels for photons. In ultracold neutral atoms, effective gauge fields have allowed the emulation of matter under strong magnetic fields leading to realization of Harper-Hofstadter and Haldane models. Here we show that application of perpendicular electric and magnetic fields effects a tunable artificial gauge potential for two-dimensional microcavity exciton polaritons. For verification, we perform interferometric measurements of the associated phase accumulated during coherent polariton transport. Since the gauge potential originates from the magnetoelectric Stark effect, it can be realized for photons strongly coupled to excitations in any polarizable medium. Together with strong polariton-polariton interactions and engineered polariton lattices, artificial gauge fields could play a key role in investigation of non-equilibrium dynamics of strongly correlated photons.

  10. Next generation interatomic potentials for condensed systems

    Science.gov (United States)

    Handley, Christopher Michael; Behler, Jörg

    2014-07-01

    The computer simulation of condensed systems is a challenging task. While electronic structure methods like density-functional theory (DFT) usually provide a good compromise between accuracy and efficiency, they are computationally very demanding and thus applicable only to systems containing up to a few hundred atoms. Unfortunately, many interesting problems require simulations to be performed on much larger systems involving thousands of atoms or more. Consequently, more efficient methods are urgently needed, and a lot of effort has been spent on the development of a large variety of potentials enabling simulations with significantly extended time and length scales. Most commonly, these potentials are based on physically motivated functional forms and thus perform very well for the applications they have been designed for. On the other hand, they are often highly system-specific and thus cannot easily be transferred from one system to another. Moreover, their numerical accuracy is restricted by the intrinsic limitations of the imposed functional forms. In recent years, several novel types of potentials have emerged, which are not based on physical considerations. Instead, they aim to reproduce a set of reference electronic structure data as accurately as possible by using very general and flexible functional forms. In this review we will survey a number of these methods. While they differ in the choice of the employed mathematical functions, they all have in common that they provide high-quality potential-energy surfaces, while the efficiency is comparable to conventional empirical potentials. It has been demonstrated that in many cases these potentials now offer a very interesting new approach to study complex systems with hitherto unreached accuracy.

  11. The Lambert-W step-potential - an exactly solvable confluent hypergeometric potential

    Science.gov (United States)

    Ishkhanyan, A. M.

    2016-02-01

    We present an asymmetric step-barrier potential for which the one-dimensional stationary Schrödinger equation is exactly solved in terms of the confluent hypergeometric functions. The potential is given in terms of the Lambert W-function, which is an implicitly elementary function also known as the product logarithm. We present the general solution of the problem and consider the quantum reflection at transmission of a particle above this potential barrier. Compared with the abrupt-step and hyperbolic tangent potentials, which are reproduced by the Lambert potential in certain parameter and/or variable variation regions, the reflection coefficient is smaller because of the lesser steepness of the potential on the particle incidence side. Presenting the derivation of the Lambert potential we show that this is a four-parametric sub-potential of a more general five-parametric one also solvable in terms of the confluent hypergeometric functions. The latter potential, however, is a conditionally integrable one. Finally, we show that there exists one more potential the solution for which is written in terms of the derivative of a bi-confluent Heun function.

  12. Pigmy resonances, transfer, and separable potentials

    Science.gov (United States)

    Bertulani, C. A.; Kadyrov, A. S.; Kruppa, A.; Hao, T. V. Nhan; Mukhamedzhanov, A. M.; Shubhchintak

    2017-06-01

    In this contribution we make a short review of recent progress on topics of current interest in nuclear physics and nuclear astrophysics. In particular, we discuss a re-analysis of the extraction of the dipole response of the pigmy resonance in 68Ni based on a continuum discretized coupled-channels calculation in relativistic Coulomb excitation experiments. We also discuss the forthcoming progresses made by our group on the Alt-Sandhas-Grassberber approach to (d,p) reactions and future expectations. The role of separable potentials in solving such equations with a test case based on applications of such potentials to phase-shift analysis is also presented.

  13. Learning potentials of the ubiquitous internet

    DEFF Research Database (Denmark)

    Dalsgaard, Christian; Pedersen, Nicholai Friis; Aaen, Janus Holst

    The aim of this paper is to identify the key learning potentials of the ubiquitous internet. Rather than focusing on mobile technology or the mobility of the learner, the paper emphasises the ubiquity of internet access as a paramount catalyst for new learning in the digital age. From...... a sociocultural perspective the paper discusses different ways in which the use of mobile devices can extend and augment the context of the learner. The learning potentials of the ubiquitous internet relate to the opportunities to extend the context of the learner on three levels: 1) personalisation...

  14. Semiempirical potentials for positron scattering by atoms

    Energy Technology Data Exchange (ETDEWEB)

    Assafrao, Denise; Walters, H. R. J.; Arretche, Felipe; Dutra, Adriano; Mohallem, J. R. [Departamento de Fisica, Universidade Federal do Espirito Santo, 29075-910, Vitoria, ES (Brazil); Department of Applied Mathematics and Theoretical Physics, Queen' s University, Belfast, BT7 1NN (United Kingdom); Departamento de Fisica, Universidade do Estado de Santa Catarina, 89223-100, Joinville, SC (Brazil); Laboratorio de Atomos e Moleculas Especiais, Departamento de Fisica, ICEx, Universidade Federal de Minas Gerais, PO Box 702, 30123-970, Belo Horizonte, MG (Brazil)

    2011-08-15

    We report calculations of differential and integral cross sections for positron scattering by noble gas and alkaline-earth atoms within the same methodology. The scattering potentials are constructed by scaling adiabatic potentials so that their minima coincide with the covalent radii of the target atoms. Elastic differential and integral cross sections are calculated for Ne, Ar, Be, and Mg, and the results are very close to experimental and best theoretical data. Particularly, elastic differential cross sections for Be and Mg at low energies are reported.

  15. Potentials for Heat Savings in Greater Copenhagen

    DEFF Research Database (Denmark)

    Nørgaard, Jørgen; Karlsson, Kenneth

    1998-01-01

    This report describes methodologies for analysing heat saving potentials. The background for the lack of activities in that field is suggested. Various elements of heat savings are described, including changes in daily behaviour and life styles. Definition of various levels of potentials...... are suggested. Two scenarios for future heat savings are established, deviating in the rates of renovation, demolition, and construction of buildings, as well as in the thermal insulation standards, ventilation systems ,and in the daily behaviour. The results are that compared to the base year 1995, heat...

  16. Memory erasure using time-multiplexed potentials

    Science.gov (United States)

    Talukdar, Saurav; Bhaban, Shreyas; Salapaka, Murti V.

    2017-06-01

    We study the thermodynamics of a Brownian particle under the influence of a time-multiplexed harmonic potential of finite width. The memory storage mechanism and the erasure protocol based on time-multiplexed potentials are utilized to experimentally realize erasure with work performed close to Landauer's bound. We quantify the work performed on the system with respect to the duty ratio of time multiplexing, which also provides a handle for approaching reversible erasures. A Langevin dynamics based simulation model is developed for the proposed memory bit and the erasure protocol, which guides the experimental realization. The study also provides insight into transport on the microscale.

  17. Analytic extension of the nuclear algebraic potential

    Energy Technology Data Exchange (ETDEWEB)

    Lichtenthaeler, R. (Departamento de Fisica Nuclear, Laboratorio do Pelletron, Universidade de Sao Paulo, Caixa Postal 20516, 01452-990 Sao Paulo, Sao Paulo (Brazil)); Gomes, L.C. (Grupo de Fisica Nuclear Teorica e Fenomenologia de Particulas Elementares Instituto de Fisica Universidade de Sao Paulo, Caixa Postal 20516, 01498-970 Sao Paulo, Sao Paulo (Brazil))

    1994-12-01

    An analytic extension of the nuclear algebraic potential in the complex energy and angular momentum planes is discussed and an approximation for the algebraic potential in agreement with the known analytic properties of the [ital S]-matrix is proposed. The invariance of the energy spectrum of the Coulomb part of the interaction is established. The results are applied to the Regge pole analysis of the [sup 12]C+[sup 24]Mg elastic collision at [ital E][sub [ital l][ital a][ital b

  18. Report list Arizona's oil, gas potential

    Science.gov (United States)

    Rauzi, S.L.

    2001-01-01

    This article is a summary of Arizona geological survey circular 29, which addresses the petroleum geology of Arizona, USA. Eight areas have been identified with fair to excellent oil and gas potential, and some Tertiary basins have evidence of source or reservoir rocks. The following are considered here: production history, lands status and services, regulation and permitting, petroleum geology, hydrocarbon indications, and areas with hydrocarbon potential and their petroleum geology and characteristics. The full report contains detailed figures of each of these basin areas, a descriptive tabulation of seeps and petroliferous rocks and extensive references.

  19. Therapeutic potential of cannabis-related drugs.

    Science.gov (United States)

    Alexander, Stephen P H

    2016-01-04

    In this review, I will consider the dual nature of Cannabis and cannabinoids. The duality arises from the potential and actuality of cannabinoids in the laboratory and clinic and the 'abuse' of Cannabis outside the clinic. The therapeutic areas currently best associated with exploitation of Cannabis-related medicines include pain, epilepsy, feeding disorders, multiple sclerosis and glaucoma. As with every other medicinal drug of course, the 'trick' will be to maximise the benefit and minimise the cost. After millennia of proximity and exploitation of the Cannabis plant, we are still playing catch up with an understanding of its potential influence for medicinal benefit. Copyright © 2015 Elsevier Inc. All rights reserved.

  20. Jost-functions and attractive singular potentials

    Energy Technology Data Exchange (ETDEWEB)

    Arnecke, Florian; Madronero, Javier; Friedrich, Harald [Physik Department T30a, Technische Universitaet Muenchen, D-85747 Garching (Germany)

    2008-07-01

    We use Jost-functions to determine the leading and next-to-leading terms of the phase shifts {delta}{sub l}(k) in the case of homogeneous attractive singular potentials -1/r{sup {alpha}}, {alpha}>2, for arbitrary angular momentum l with incoming boundary conditions at small distances. The Jost-solutions are obtained by solving a Volterra-equation and a more general ansatz is used to fit the Jost-solutions to the WKB-waves in the inner region, where the WKB-approximation is accurate. A connection between the phase shifts of attractive and repulsive homogeneous singular potentials is presented.

  1. Potential profile in a conducting polymer strip

    DEFF Research Database (Denmark)

    Bay, Lasse; West, Keld; Vlachopoulos, Nikolaos

    2002-01-01

    and complicate measurements on free-standing films. A model of the potential profile in a free-standing strip is derived. It is found that the active length (the length with a given potential change) of the polymer will scale as square root (d sigma /i/sub d/). (d is the thickness, sigma the conductivity...... of the film, and i/sub d/ the diffusion limited current density for oxygen reduction). The active length is typically of the order of millimeters. The model is compared with measurements on a strip of polypyrrole doped with dodecylbenzene sulfonate...

  2. Talent development – dealing with potentiality

    DEFF Research Database (Denmark)

    Olesen, Jesper; Nielsen, Jens Christian; Søndergaard, Dorte Marie

    2017-01-01

    - and a talent development environment which, in their encounter, creates an affect that produces talent. Based on a case study on Jamie, a badminton player, we show that the combined talent/development assemblage is capable of maintaining a talent despite the fact that Jamie has a long-term injury...... and is completely unable to play badminton for long periods of time. We argue that talent development is a particular way of handling potentiality which, in the struggle to achieve the ultimate goal of excellence, results in a number of affects: it translates potential into a singular talent; it enables...

  3. Analysis of potential helicopter vibration reduction concepts

    Science.gov (United States)

    Landgrebe, A. J.; Davis, M. W.

    1985-01-01

    Results of analytical investigations to develop, understand, and evaluate potential helicopter vibration reduction concepts are presented in the following areas: identification of the fundamental sources of vibratory loads, blade design for low vibration, application of design optimization techniques, active higher harmonic control, blade appended aeromechanical devices, and the prediction of vibratory airloads. Primary sources of vibration are identified for a selected four-bladed articulated rotor operating in high speed level flight. The application of analytical design procedures and optimization techniques are shown to have the potential for establishing reduced vibration blade designs through variations in blade mass and stiffness distributions, and chordwise center-of-gravity location.

  4. Family migration and relative earnings potentials

    DEFF Research Database (Denmark)

    Foged, Mette

    2016-01-01

    A unitarian model of family migration in which families may discount wives’ private gains is used to derive testable predictions regarding the type of couples that select into migrating. The empirical tests show that gender neutral family migration cannot be rejected against the alternative...... of husband centered migration. Couples are more likely to migrate if household earnings potential is disproportionally due to one partner, and families react equally strongly to a male and a female relative advantage in educational earnings potential. These results are driven by households with a strong...

  5. Transient receptor potential channels on sensory nerves.

    Science.gov (United States)

    Eid, S R; Cortright, D N

    2009-01-01

    The somatosensory effects of natural products such as capsaicin, mustard oil, and menthol have been long recognized. Over the last decade, the identification of transient receptor potential (TRP) channels in primary sensory neurons as the targets for these agents has led to an explosion of research into the roles of "thermoTRPs" TRPV1, TRPV2, TRPV3, TRPV4, TRPA1, and TRPM8 in nociception. In concert, through the efforts of many industrial and academic teams, a number of agonists and antagonists of these channels have been discovered, paving the way for a better understanding of sensory biology and, potentially, for novel treatments for diseases.

  6. Extrapolating meaning from local field potential recordings.

    Science.gov (United States)

    Harris Bozer, Amber L; Uhelski, Megan L; Li, Ai-Ling

    2017-01-01

    Local field potentials (LFP) reflect the spatially weighted low-frequency activity nearest to a recording electrode. LFP recording is a window to a wide range of cellular activities and has gained increasing attention over recent years. We here review major conceptual issues related to LFP with the goal of creating a resource for non-experts considering implementing LFP into their research. We discuss the cellular activity that constitutes the local field potential; recording techniques, including recommendations and limitations; approaches to analysis of LFP data (with focus on power-banded analyses); and finally we discuss reports of the successful use of LFP in clinical applications.

  7. Path planning using optically computed potential fields

    Science.gov (United States)

    Reid, Max B.

    1993-01-01

    An algorithm for the optical computation of potential field maps suitable for mobile robot navigation is described and experimentally produced maps and paths are presented. The parallel analog optical computation employs a two-dimensional spatial light modulator on which an image of the potential field map is generated. Optically calculated fields contain no local minima, tend to produce paths centered in gaps between obstacles, and produce paths which give preference to wide gaps. Calculation of 128 x 128 pixel fields at a few hertz are possible with current technology, and calculation time vs. map size scales favorably in comparison to digital electronic computation.

  8. Characteristics of potential successful emerging commercial cotton ...

    African Journals Online (AJOL)

    Characteristics of potential successful emerging commercial cotton farmers. ... This paper describes a typology of sample households in terms of their farming ... The realistic description of the various socio-economic groupings can facilitate the design of the support system based on the needs and aspiration of such groups.

  9. YL-SUBSTITUTED PHENOLS AND THEIR POTENTIAL ...

    African Journals Online (AJOL)

    nb

    THEIR POTENTIAL SEMISYNTHESES FROM CASHEW NUT SHELL LIQUID. Stephen JM Mdachi. Chemistry ... structural features present in phenolic constituents of Cashew Nut Shell Liquid (CNSL) and, thus, inspire researchers to undertake ..... obtuse, a Pathogen of Black Dead. Arm Disease of Grapevine. Eur. J.

  10. Maximum potential preventive effect of hip protectors

    NARCIS (Netherlands)

    van Schoor, N.M.; Smit, J.H.; Bouter, L.M.; Veenings, B.; Asma, G.B.; Lips, P.T.A.M.

    2007-01-01

    OBJECTIVES: To estimate the maximum potential preventive effect of hip protectors in older persons living in the community or homes for the elderly. DESIGN: Observational cohort study. SETTING: Emergency departments in the Netherlands. PARTICIPANTS: Hip fracture patients aged 70 and older who

  11. Mineralogical, Geochemical, Physical And Industrial Potentials Of ...

    African Journals Online (AJOL)

    %) and shrinkage limit (8.30 – 8.70%) as well as low vitrification. The shale is also characterized by high loss on ignition (16.8%). Keywords: mineralogy, chemical, physical, industrial potential, shale. Journal of Mining and Geology Vol.

  12. Analyzing animal movement patterns using potential functions

    Science.gov (United States)

    H. K. Preisler; A. A. Ager; M. J. Wisdom

    2013-01-01

    The advent of GPS technology has made it possible to study human-wildlife interactions on large landscapes and quantify behavioral responses to recreation and other anthropogenic disturbances at increasingly fine scales. Of particular interest are the potential impacts on habitat use patterns, energetics, and cascading impacts on fecundity and other life history traits...

  13. Mineral potential mapping with mathematical geological models

    NARCIS (Netherlands)

    Porwal, A.K.

    2006-01-01

    Mathematical geological models are being increasingly used by natural resources delineation and planning agencies for mapping areas of mineral potential in order to optimize land use in accordance with socio-economic needs of the society. However, a key problem in spatial-mathematical-model-based

  14. Mung Bean: Technological and Nutritional Potential

    NARCIS (Netherlands)

    Dahiya, P.K.; Linnemann, A.R.; Boekel, van M.A.J.S.; Khetarpaul, N.; Grewal, R.B.; Nout, M.J.R.

    2015-01-01

    Mung bean (Vigna radiata (L.) R.Wilczek) has been intensively researched; scattered data are available on various properties. Data on physical, chemical, food processing, and nutritional properties were collected for whole mung bean grains and reviewed to assess the crop’s potential as food and to

  15. Sampling and analysis of potential geothermal sites

    Science.gov (United States)

    Sung, R.; Houser, G.; Strehier, D.; Scheyer, K.

    1981-08-01

    Information on the physical, chemical and radiochemical data of geothermal manifestations (wells and springs) in areas with the most probable potential for development was documented. The information can be used to evaluate control technologies and to ultimately establish emission/discharge standards for the emerging geothermal industry.

  16. EVALUATION OF THE ADSORPTION POTENTIAL OF RUBBER ...

    African Journals Online (AJOL)

    2012-11-03

    Nov 3, 2012 ... Abstract. The objective of this study was to produce activated carbon from rubber seed pericarp and to evaluate its performance with commercial activated carbon in the treatment of abattoir wastewater as well as its potential in the adsorption of iron (III) ions from aqueous solution. The rubber seed pericarp ...

  17. Estimation of salinity power potential in India

    Digital Repository Service at National Institute of Oceanography (India)

    Das, V.K.; RamaRaju, D.V.

    Salinity gradient as a source of energy has much potential, but this has been recognized only recently. The energy density of this source is equivalent to about 250 m water head for a salinity difference of 35 ppt. This source exists...

  18. Potential for solar water heating in Zimbabwe

    NARCIS (Netherlands)

    Batidzirai, B.|info:eu-repo/dai/nl/341355909; Lysen, E.H.|info:eu-repo/dai/nl/071394923; van Egmond, S.; van Sark, W.G.J.H.M.|info:eu-repo/dai/nl/074628526

    2009-01-01

    This paper discusses the economic, social and environmental benefits from using solar water heating (SWH) in Zimbabwe. By comparing different water heating technology usage in three sectors over a 25-year period, the potential of SWH is demonstrated in alleviating energy and economic problems that

  19. European biomass resource potential and costs

    NARCIS (Netherlands)

    de Wit, M.P.; Faaij, A.P.C.

    2009-01-01

    The objective of this study is to assess the European (EU27+ and Ukraine) cost and supply potential for biomass resources. Three methodological steps can be distinguished (partly based on studies explained elsewhere in this volume) (i) an evaluation of the available ‘surplus’ land, (ii) a modeled

  20. Potentially novel Ehrlichia species in horses, Nicaragua.

    Science.gov (United States)

    O'Nion, Victoria L; Montilla, Hernan J; Qurollo, Barbara A; Maggi, Ricardo G; Hegarty, Barbara C; Tornquist, Susan J; Breitschwerdt, Edward B

    2015-02-01

    Ehrlichia sp. DNA was amplified from 4 Ehrlichia-seroreactive horses from Mérida, Nicaragua. Sequencing of 16S rDNA, sodB, and groEL genes indicated that the bacterium is most likely a novel Ehrlichia species. The tick vector and the potential for canine and human infection remain unknown.

  1. Antimicrobial activities, toxinogenic potential and sensitivity to ...

    African Journals Online (AJOL)

    SAM

    2014-08-27

    Aug 27, 2014 ... spoilage bacteria, yeasts and molds, toxinogenic potential and sensitivity to antibiotics of 26 Bacillus strains (11 Bacillus subtilis, .... parapsilosis CLIB214) and four molds (Mucor plumbeus. CBS129.41; Aspergillus niger ...... biofilms associated with silicone gastronomy tubes removed from pediatric patients.

  2. Consumer Attitudes, Market Potential and Microbiological Analysis ...

    African Journals Online (AJOL)

    This study was conducted to explore consumers' attitudes and market potential for a fermented dairy product-kefir. It was also intended to produce experimental kefir and undertake nutritional, microbial, texture and viscosity analyses as well as sensory quality evaluation. In order to meet the objectives, a direct questionnaire ...

  3. Biological Potential of Chitinolytic Marine Bacteria

    DEFF Research Database (Denmark)

    Paulsen, Sara Skøtt; Andersen, Birgitte; Gram, Lone

    2016-01-01

    Chitinolytic microorganisms secrete a range of chitin modifying enzymes, which can be exploited for production of chitin derived products or as fungal or pest control agents. Here, we explored the potential of 11 marine bacteria (Pseudoalteromonadaceae, Vibrionaceae) for chitin degradation using...

  4. Antimicrobial susceptibilty of potentially pathogenic halophilic Vibrio ...

    African Journals Online (AJOL)

    Surveillance of antimicrobial resistance is indispensable for empirical treatment of infections and in preventing the spread of antimicrobial resistant microorganisms. This study is aimed at determining the antibiotic susceptibility of potentially pathogenic halophylic Vibrio species isolated in Lagos, Nigeria. Susceptibility ...

  5. Emotion Potentiated Startle in Fragile X Syndrome

    Science.gov (United States)

    Ballinger, Elizabeth C.; Cordeiro, Lisa; Chavez, Alyssa D.; Hagerman, Randi J.; Hessl, David

    2014-01-01

    Social avoidance and anxiety are prevalent in fragile X syndrome (FXS) and are potentially mediated by the amygdala, a brain region critical for social behavior. Unfortunately, functional brain resonance imaging investigation of the amygdala in FXS is limited by the difficulties experienced by intellectually impaired and anxious participants. We…

  6. Deriving relativistic Bohmian quantum potential using variational ...

    Indian Academy of Sciences (India)

    ever, this postulate (locality) breaks down and opens new windows for understanding our. Universe. 2.2 Relativistic quantum potential for a spinless particle. Following Bohm, we substitute the polar form of the wave function into the Klein–Gordon equation to derive the quantum mechanical Hamilton–Jacobi equation for a ...

  7. Protectant, insecticidal and antimicrobial potentials of Dalbergia ...

    African Journals Online (AJOL)

    PRECIOUS

    2009-12-01

    Dec 1, 2009 ... 2Department of Biological Sciences, University of Abuja, Gwagwalada, Abuja, Nigeria. Accepted 30 October, 2009. The protectant, insecticidal and ... properties demonstrate the great potentials of D. saxatilis for use in agriculture and medicine. The relevance of bioassay-guided fractionation in ensuring ...

  8. Diamagnetism of quantum gases with singular potentials

    DEFF Research Database (Denmark)

    Briet, Philippe; Cornean, Horia; Savoie, Baptiste

    2010-01-01

    We consider a gas of quasi-free quantum particles confined to a finite box, subjected to singular magnetic and electric fields. We prove in great generality that the finite volume grand-canonical pressure is analytic with respect to the chemical potential and the intensity of the external magneti...

  9. Opportunity potential matrix for Atlantic Canadians

    Science.gov (United States)

    Greg Danchuk; Ed Thomson

    1992-01-01

    Opportunity for provision of Parks Service benefit to Atlantic Canadians was investigated by mapping travel behaviour into a matrix in terms of origin, season, purpose, distance, time, and destination. Findings identified potential for benefit in several activity areas, particularly within residents' own province.

  10. POTENTIAL OF WATER HYACINTH (EICHHORNIA CRASSIPES ...

    African Journals Online (AJOL)

    Preferred Customer

    ABSTRACT: The objective of the present study was to evaluate the potential use of water hyacinth for the removal of chromium (Cr) from tannery wastewater. This experiment was performed using healthy, young and acclimatized water hyacinth collected from unpolluted Awash. River. Cr concentrations of 3, 5, 7, 10 and 20 ...

  11. Geomorphological Potential of Coelacanth Habitat across ...

    African Journals Online (AJOL)

    The coelacanth is a new fish in Tanzania. It was first discovered in September 2003 after it was spotted by a tourist in a fish market. It was caught by fishermen in the deep waters off Songo Mnara Island offshore of Kilwa Masoko Town in Southern Tanzania. The find potentially added southern Tanzania to the list of known ...

  12. Modeling the Clarification Potential of Instructions

    DEFF Research Database (Denmark)

    Benotti, Luciana; Blackburn, Patrick Rowan

    2017-01-01

    We hypothesize that conversational implicatures are a rich source of clarification requests, and in this paper we do two things. First, we motivate the hypothesis in theoretical, practical and empirical terms and formulate it as a concrete Clarification Potential Principle: implicatures may becom...

  13. (ajst) the potential for gold mineralisation

    African Journals Online (AJOL)

    Both quartz vein-hosted and Banded Iron Formation (BIF)-hosted gold deposits occur in Busia district. The results of ... The Potential for Gold Mineralisation in the Greenstone Belt of Busia District, South Eastern Uganda. 117. Figure 1: Map of ...... recovery techniques and so needs to be quantified in order to determine the ...

  14. Potentials of Information and Communication Technologies for ...

    African Journals Online (AJOL)

    The paper examined the potentials and benefits of Information and Communication Technologies (ICTs) as a means of enhancing food security and alleviating poverty in Nigeria. Access to information and improved communication is a crucial requirement for sustainable development. The paper describes how ICTs could ...

  15. BIOECOLOGICAL POTENTIAL OF APIDEA IN CAUCASUS

    Directory of Open Access Journals (Sweden)

    M. A. Abakarova

    2011-01-01

    Full Text Available For the first time an analysis of bioecological potential bee in their areas of settlement in the territory of Dagestan is made. Designed a scientifically sound system of measures for the conservation and restoration of biological diversity of bees in the Republic of Dagestan.

  16. Energy transfer in scattering by rotating potentials

    Indian Academy of Sciences (India)

    R. Narasimhan (Krishtel eMaging) 1461 1996 Oct 15 13:05:22

    subspace of asymptotically free scattering states. 3. Evolution in a rotating frame. Here we study the time evolution in a rotating frame for potentials which no longer have to be smooth. This transformation yields an explicit formula for the propagator U(t,s) in terms of the unitary group for some time-independent generator.

  17. The antibacterial potentials of Nauclea latifolia

    African Journals Online (AJOL)

    STORAGESEVER

    2008-05-16

    May 16, 2008 ... Key words: Antimicrobial potentials, Nauclea latifolia, bacterial pathogens, Nigeria. ... Bacterial and fungal pathogens have evolved numerous defense ..... 61: 280-281. Maduabunyi II (1995). Anti – hepatoxic and Trypanocidal activities of the Ethanolic Extract of Nauclea latifolia Root Bark. J. Herbs Spices.

  18. Fishery potential of the Gulf of Kachchh

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, V.R.; Govindan, K.; Ramaiah, Neelam; Gajbhiye, S.N.

    Fishery potential of the interior Gulf of Kachchh and adjacent creek regions was reported for the first time as baseline data for future ecological assessment. The experimental trawling and gill netting indicated that the inner Gulf (av. 7.8 kg...

  19. Developing Human Resources through Actualizing Human Potential

    Science.gov (United States)

    Clarken, Rodney H.

    2012-01-01

    The key to human resource development is in actualizing individual and collective thinking, feeling and choosing potentials related to our minds, hearts and wills respectively. These capacities and faculties must be balanced and regulated according to the standards of truth, love and justice for individual, community and institutional development,…

  20. Ampicillin potentials as Corrosion Inhibitor: fukui function ...

    African Journals Online (AJOL)

    Inhibition and adsorption potentials of ampicillin for the corrosion of mild steel in solutions of HCl have been investigated using empirical and computational approach. The experimental study was carried out using gravimetric and Fourier transform infrared spectroscopy methods of monitoring corrosion while the ...

  1. determination of vectorial potential of mansonia species

    African Journals Online (AJOL)

    East African Medical Journal Vol. 88 No. 10 October 2011. DETERMINATION OF VECTORIAL POTENTIAL OF MANSONIASPECIES IN THE TRANSMISSION OF WUCHERERIA. BANCROFT IN TANA-DELTA DISTRICT, COAST-KENYA. N. M. Kinyatta, Centre for Biotechnology Research and Development, Kenya Medical ...

  2. Introducing the Action Potential to Psychology Students

    Science.gov (United States)

    Simon-Dack, Stephanie L.

    2014-01-01

    For this simple active learning technique for teaching, students are assigned "roles" and act out the process of the action potential (AP), including the firing threshold, ion-specific channels for ions to enter and leave the cell, diffusion, and the refractory period. Pre-post test results indicated that students demonstrated increased…

  3. Computer Simulation of the Neuronal Action Potential.

    Science.gov (United States)

    Solomon, Paul R.; And Others

    1988-01-01

    A series of computer simulations of the neuronal resting and action potentials are described. Discusses the use of simulations to overcome the difficulties of traditional instruction, such as blackboard illustration, which can only illustrate these events at one point in time. Describes systems requirements necessary to run the simulations.…

  4. Geothermal Energy Potential in Western United States

    Science.gov (United States)

    Pryde, Philip R.

    1977-01-01

    Reviews types of geothermal energy sources in the western states, including hot brine systems and dry steam systems. Conversion to electrical energy is a major potential use of geothermal energy, although it creates environmental disruptions such as noise, corrosion, and scaling of equipment. (AV)

  5. Bacteriocinogenic potential and genotypic characterization of three ...

    African Journals Online (AJOL)

    The detection of bacteriocinogenic potential of Enterococcus sp. isolates from Algerian raw milk coded LO4 and LO12 and from traditional butter coded BRO2 was carried on M17 buffered medium. PCR amplification of Enterococcus sp. DNA using specific enterococcal primers gave 733 bp fragments. The phylogenetic ...

  6. Antigenotoxic and anticlastogenic potential of Agaricus bisporus ...

    African Journals Online (AJOL)

    The aim of the present study is to evaluate, for the first time, antigenotoxic potential of Agaricus bisporus against methyl methanesulphonate induced toxicity in human lymphocyte culture in vitro and in bone marrow cells of albino mice in vivo. The parameters studied included total aberrant cells and the frequencies of ...

  7. Development of Creative Potential of Cinema Tourism

    Science.gov (United States)

    Dzhandzhugazova, Elena A.; Ilinaa, Elena L.; Latkin, Aleksander N.; Koshelevava, Anna I.

    2016-01-01

    The relevance of the problem indicated in the article is caused by the fact that under current conditions it is necessary to offer high-quality and demanded tourist products, formed at the combination of various industries on the basis of wide application of creative potential of different industries, including tourism and cinema, a harmonious…

  8. Factors influencing income generating potentials amongst cashew ...

    African Journals Online (AJOL)

    The study identified the income generating potentials of cashew fruits and attitude of farmers towards adding value to cashew in Ogbomoso, Oyo state, Nigeria. A structured interview schedule was designed to elicit information on selected personal characteristics, level of income generated from cashew fruits, sources of ...

  9. Liquefaction potential mapping for San Francisco

    Energy Technology Data Exchange (ETDEWEB)

    Kavazanjian, E.; Echezuria, H.; Roth, R.A.

    1985-01-01

    The potential of saturated deposits of cohesionless soil in downtown San Francisco to experience initial liquefaction due to seismically induced pore pressure is evaluated. Initial liquefaction, or the zero effective stress state, is used as the index of liquefaction potential because it provides the best available index for damage due to seismically induced pore pressures. Liquefaction potential is evaluated by comparing the conditional probability of liquefaction, or liquefaction susceptibility, to the expected intensity of seismic loading, or liquefaction opportunity. The probabilistic evaluation is made using a liquefaction hazard model developed by Chameau. Assuming the water table to be at the ground surface, results indicate that while no liquefaction is expected anywhere for an intensity with an annual probability of exceedance of 0.05, only the most resistant deposits will survive an event with an annual probability of exceedance of 0.02. For an event with an annual probability of exceedance of 0.01, initial liquefaction is expected to occur within all saturated, cohesionless soil deposits in the downtown San Francisco area. It must be emphasized that in dense soil deposits the consequences of initial liquefaction may be minimal because of their limited shear strain potential.

  10. Forecasting the potential of Danish biogas production

    DEFF Research Database (Denmark)

    Bojesen, Mikkel; Skov-Petersen, Hans; Gylling, Morten

    , except for those farms which are in the largest state class. Regional differences in development trends were documented. The strategic objective of the model is to provide data for the spatial assessment of the potential of biogas production which can form the basis for a location analysis for future...... biogas plants....

  11. Projections of precipitation, air temperature and potential ...

    African Journals Online (AJOL)

    The potential evapotranspiration has an increasing trend and exceeds the precipitation in the months of June to September. Climate projections indicate trend towards a warmer and wetter climate. Increases in mean temperature are projected under all models and scenarios, while all models also indicate increases in ...

  12. Potential theory and the Lorenz condition

    DEFF Research Database (Denmark)

    Appel-Hansen, Jørgen

    1994-01-01

    When potentials are used to calculate the electromagnetic field intensities choices may be made. The present study is carried out in order to outline the various possibilities. It looks like the types of choices and their number depend on the actual situation and the preferences of the researcher...

  13. Marketing potential of advanced breeding clones

    Science.gov (United States)

    The accumulation of reducing sugars during cold storage of potato tubers is a serious and costly problem for producers and processors. The degree to which cultivars accumulate reducing sugars during storage determines their processing and market potential. Cultivars or advanced breeding lines with...

  14. Maximizing Learning Potential in the Communicative Classroom.

    Science.gov (United States)

    Kumaravadivelu, B.

    1993-01-01

    A classroom observational study is presented to assess whether a macrostrategies framework will help communicative language teaching teachers to maximize learner potential in the classroom. Analysis of two classroom episodes revealed that one episode was evidently more communicative than the other. (seven references) (VWL)

  15. Phylogenetic Distribution of Potential Cellulases in Bacteria

    Science.gov (United States)

    Berlemont, Renaud

    2013-01-01

    Many microorganisms contain cellulases that are important for plant cell wall degradation and overall soil ecosystem functioning. At present, we have extensive biochemical knowledge of cellulases but little is known about the phylogenetic distribution of these enzymes. To address this, we analyzed the distribution of 21,985 genes encoding proteins related to cellulose utilization in 5,123 sequenced bacterial genomes. First, we identified the distribution of glycoside hydrolases involved in cellulose utilization and synthesis at different taxonomic levels, from the phylum to the strain. Cellulose degradation/utilization capabilities appeared in nearly all major groups and resulted in strains displaying various enzyme gene combinations. Potential cellulose degraders, having both cellulases and β-glucosidases, constituted 24% of all genomes whereas potential opportunistic strains, having β-glucosidases only, accounted for 56%. Finally, 20% of the bacteria have no relevant enzymes and do not rely on cellulose utilization. The latter group was primarily connected to specific bacterial lifestyles like autotrophy and parasitism. Cellulose degraders, as well as opportunists, have multiple enzymes with similar functions. However, the potential degraders systematically harbor about twice more β-glucosidases than their potential opportunistic relatives. Although scattered, the distribution of functional types, in bacterial lineages, is not random but mostly follows a Brownian motion evolution model. Degraders form clusters of relatives at the species level, whereas opportunists are clustered at the genus level. This information can form a mechanistic basis for the linking of changes in microbial community composition to soil ecosystem processes. PMID:23263967

  16. Evaluation of phytoremediation potential of Peltophorum pterocarpum

    African Journals Online (AJOL)

    ADOWIE PERE

    Full-text Available Online at www.ajol.info and www.bioline.org.br/ja. Evaluation of phytoremediation potential .... analytical grade and were purchased and obtained from Welly International Company Nigeria. (Scientific/Hospital and ..... exposition to pollutants. This might be related to plant age and time of pollutant exposure ...

  17. Phytotherapeutic potentials and biochemical study of Nypa ...

    African Journals Online (AJOL)

    The phytochemical evaluation in order to elucidate the phytotherapeutic potentials of Nypa fructicans (Nypa palm) using ethanolic extracts of the leaf, stem, root and fruit revealed the presence of tannins, flavonoids, saponins, terpenes, anthraquinones, alkaloids, cardiac and cyanogenic glycosides in each of the plants ...

  18. Profile, antioxidant potential, and applicability of phenolic ...

    African Journals Online (AJOL)

    ) of Spirulina platensis and assesses their antioxidant potential, applying them as a natural conservative in minimally processed apples. The phenolic extract showed 396 &µg g-1 gallic acid, 347 µg g-1 of caffeic acid, 54 µg g-1 salicylic acid ...

  19. Antioxidant and hepatoprotective potentials of Bauhinia variegata ...

    African Journals Online (AJOL)

    Background: Iron accumulation in the liver is customary in pathological conditions associated with oxidative stress. Iron is also an essential element for organisms at its physiological levels. This study was aimed at investigating the antioxidant and hepatoprotective potential of acetone and methanol defatted seed extracts of ...

  20. Tomato: Potentials for Alternative Source of Economic ...

    African Journals Online (AJOL)

    This paper is a study of the potentials of tomato production as a viable source of economic empowerment. An empirical survey was undertaken through oral interviews in Kano to identify farmers' revenues, and agricultural development thereby assessing the connection between tomato production and economic reliance.

  1. Measuring galaxy potentials using shell kinematics

    NARCIS (Netherlands)

    Merrifield, MR; Kuijken, K

    1998-01-01

    We show that the kinematics of the shells seen around some elliptical galaxies provide a new, independent means for measuring the gravitational potentials of elliptical galaxies out to large radii. A numerical simulation of a set of shells formed in the merger between an elliptical and a smaller

  2. Investigating the sourdough potential for enhance microbiological ...

    African Journals Online (AJOL)

    In this study, potential effects of sourdough on microbiological shelf life and roasty aroma of traditional Lavash bread were studied. For investigating the biopreservation effect of sourdough, after intentional contamination of flour with hygiene indicator microorganisms that cause mouldiness and ropiness, survival curves of ...

  3. Inflammatory bowel disease: potential therapeutic strategies

    DEFF Research Database (Denmark)

    Nielsen, O H; Vainer, B; Bregenholt, S

    1997-01-01

    This review deals with potential and possibly primary therapeutics that, through insight into the inflammatory cascade, result in more rational treatment principles replacing the classical therapy of inflammatory bowel disease (IBD), i.e. Crohn's disease (CD) and ulcerative colitis (UC). These ne...

  4. Potentially fatal tricuspid valve aspergilloma detected after ...

    African Journals Online (AJOL)

    Potentially fatal tricuspid valve aspergilloma detected after laparoscopic abdominal surgery. ... Aspergillus endocarditis is usually associated with high morbidity and mortality. ... The patient was successfully managed with emergency open-heart surgery and systemic antifungal agents in the postoperative period. Keywords: ...

  5. Bioremediation potential of Lentinus subnudus in decontaminating ...

    African Journals Online (AJOL)

    The aim of this work was to study the efficacy of using a white-rot fungi Lentinus subnudus to treat crude oil polluted soil by employing its biodegradation and bioaccumulation potentials. The polluted soil was amended with plantain peels and treated with spawns of Lentinus subnudus for 180 days. The physicochemical ...

  6. Measuring Leadership Potential. ERIC Digest, Number 115.

    Science.gov (United States)

    Lashway, Larry

    Today there are dozens of instruments that claim to measure leadership capacities. Although every instrument has limitations and must be used carefully, the tests can be used to identify leadership potential. This digest summarizes the reasons for using formal assessments, the attributes measured by such tests, the ways in which leadership…

  7. Toxic Potential of Carcinogenic Polycyclic Aromatic Hydrocarbons ...

    African Journals Online (AJOL)

    DR. GODSON

    Toxic Potential of Carcinogenic Polycyclic Aromatic Hydrocarbons (cPAHs) and Heavy. Metal in Crude Oil from Gokana Area, Rivers State, Nigeria. *1. IWUOHA, G;. 1. ORUBITE, O;. 1. OKITE I. 1Department of Pure and Industrial Chemistry, Faculty of Sciences, University of Port Harcourt. ABSTRACT: This article is focused ...

  8. Towards a standardization of biomethane potential tests

    DEFF Research Database (Denmark)

    Holliger, C.; Alves, M.; Andrade, D.

    2016-01-01

    Production of biogas fromdifferent organic materials is a most interesting source of renewable energy. The biomethane potential (BMP) of these materials has to be determined to get insight in design parameters for anaerobic digesters. Although several norms and guidelines for BMP tests exist...

  9. Energy from streaming current and potential

    NARCIS (Netherlands)

    Olthuis, Wouter; Schippers, Bob; Eijkel, Jan C.T.; van den Berg, Albert

    2005-01-01

    It is investigated how much energy can be delivered by a streaming current source. A streaming current and subsequent streaming potential originate when double layer charge is transported by hydrodynamic flow. Theory and a network model of such a source is presented and initial experimental results

  10. Environmentally dependent bond-order potentials: New ...

    Indian Academy of Sciences (India)

    Firstly, we have found that a simple pair potential is unsuitable for describing the environmental screening effects due to the and orbital overlap repulsion in transition metal alloys and therefore the inability to reproduce the negative Cauchy pressures exhibiting in strong covalent systems. By adding the environmental ...

  11. Mathematical potential of special education students

    NARCIS (Netherlands)

    Peltenburg, M.C.

    2012-01-01

    This PhD research was aimed at investigating the mathematical potential of special education (SE) students. SE students often have a severe delay in their mathematical development compared to peers in regular education. However, there are indications that SE students could attain more and that there

  12. El Dorado; An old field with potential

    Energy Technology Data Exchange (ETDEWEB)

    Ramondetta, P.J. (Oxy USA Inc., Oklahoma City, OK (US))

    1990-03-26

    The author presents a study of the El Dorado field. The study indicates that early wells were prematurely abandoned because of mechanical failure. Redrilling portions of the field is found to have significant potential for the Admire, Viola, Simpson, and Arbuckle pay zones. The ability to predict reserves in this field is assessed.

  13. [Potential radiation hazard in nuclear medicine].

    Science.gov (United States)

    Guilabert, Nadine; Ricard, Marcel; Chamoulaud, Karen; Mazelier, Carole; Schlumberger, Martin

    2015-01-01

    Nuclear medicine uses unsealed radioisotopes. The potential radiation hazards depend on the amount of radioactivity administered and the type of radionucleide. Thus, radiation safety instructions will minimize radiation exposure and contamination as low as reasonably achievable. National nuclear safety authority requires rules, regulations and exposure limits for both patients and workers. Good practices and training staff contribute to optimize the radioprotection.

  14. Potential male gametophyte competition among camellia sinensis ...

    African Journals Online (AJOL)

    Significant variation (P < 0.05) in pollen viability among the eight genotypes indicated a potential for male gametophyte competition. There was significant genotype by environment interaction and positive correlation between pollen viability and temperature. Pollen germination was, however, not affected by rainfall and ...

  15. Therapeutic potentials and pharmacological properties of Moringa ...

    African Journals Online (AJOL)

    Therapeutic potentials and pharmacological properties of Moringa oleifera Lam in the treatment of diabetes mellitus and related complications. ... DM is a metabolic disorder resulting from abnormal insulin secretion. This leads to chronic hyperglycemia with disturbances of carbohydrate metabolism. Hyperglycemic-induced ...

  16. Infection potential of vegetative incompatible Ganoderma boninense ...

    African Journals Online (AJOL)

    LiP), manganese peroxidase (MnP) and laccase to degrade the lignin composition in plant cell walls. The present study aimed to evaluate the infection potential of vegetative incompatible isolates of G. boninense in causing Basal Stem Rot ...

  17. Screening of fungi for soil remediation potential

    Science.gov (United States)

    Richard T. Lamar; Laura M. Main; Diane M. Dietrich; John A. Glaser

    1999-01-01

    The purpose of the present investigation was to determine if physiological and/or biochemical factors such as growth rate, tolerance to and ability to degrade PCP or creosote have use for predicting the potential bioremediation performance of fungi. Because we have focused the initial development of a fungal-based soil remediation technology on PCP- and/or creosote-...

  18. Bio-SNG potential assessment: Denmark 2020

    Energy Technology Data Exchange (ETDEWEB)

    Ahrenfeldt, J.; Thomsen, T. (Risoe DTU, Roskilde (Denmark)); Joergensen, Betina (Dansk Gasteknisk Center A/S, Hoersholm (Denmark))

    2010-11-15

    In this project the potential for SNG based on biomass gasification has been sought elucidated. As part of the project a model for simulation of biomass in Denmark has been developed. The conclusion is that SNG can substitute a significant amount of natural gas, but the energy efficiency should be improved. (Author)

  19. Aquifer characterization and groundwater potential assessment of ...

    African Journals Online (AJOL)

    ... integrated electrical resistivity and borehole lithologic logs with a view to characterizing the aquifer and assessing the groundwater potential. One hundred and four Vertical Electrical Soundings (VES) were quantitatively interpreted using the partial curve matching technique and computer assisted 1-D forward modeling.

  20. Immunomodulatory Potential of Patchouli Alcohol Isolated from ...

    African Journals Online (AJOL)

    Purpose: To isolate and purify patchouli alcohol (PA), a tricyclic sesquiterpene constituent of Pogostemon cablin, and investigate its immunomodulatory potential in Kunming mice. Methods: PA was prepared from an ethanol aqueous extract of P. cablin by silica gel column chromatography, and further purified by ...

  1. Botanical galactogogues: nutritional values and therapeutic potentials

    African Journals Online (AJOL)

    SARAH

    2013-01-31

    Jan 31, 2013 ... The plants showed therapeutic potentials against E. coli and K. pneumoniae. They could be used for the ... Iron, copper, and zinc contents of human milk vary considerably and a long list of other trace elements has been reported. All of the vitamins except vitamin K are found in human milk in nutritionally ...

  2. Potential environmental impacts associated with the proposed ...

    African Journals Online (AJOL)

    Part of the overall evaluation of this scheme included an assessment of the potential environmental impacts that could arise. An initial environmental evaluation was conducted from a point approximately 40 kilometres upstream of Rundu in Namibia, to the distal end of the Okavango Delta at Maun in Botswana. Hydrological ...

  3. Proton radioactivity with analytically solvable potential

    Indian Academy of Sciences (India)

    been carried out to study the proton radioactivity from proton-rich nuclei [2]. The existing theoretical studies can be classified into two broad categories. In the first category different theoretical approaches are based on quantum mechanical foun- dation such as transmission through a potential barrier [3], distorted wave Born.

  4. EGGS: CLEARING THE CHARGES, EXPLORING THE POTENTIAL ...

    African Journals Online (AJOL)

    0655711075

    EGGS: CLEARING THE CHARGES, EXPLORING THE POTENTIAL! Of all the different kinds of foods, an egg is special for its combination of all essential food nutrients in one item. Chicken eggs have an average weight of (~50g) with two distinct parts that have distinct nutritional values: the yolk (17g); and white (33g).

  5. Bessel potential space on the Laguerre hypergroup

    Directory of Open Access Journals (Sweden)

    Ahmed Taieb

    2011-01-01

    Full Text Available Abstract In this article, we define the fractional differentiation Dδ of order δ, δ > 0, induced by the Laguerre operator L and associated with respect to the Haar measure dmα. We obtain a characterization of the Bessel potential space using Dδ and different equivalent norms.

  6. Potential of Microbubbles as Fat Replacer

    NARCIS (Netherlands)

    Rovers, T.A.M.; Sala, Guido; Linden, Van der Erik; Meinders, M.B.J.

    2016-01-01

    The potential of microbubbles as fat replacers and texture modifiers was assessed by comparison of the rheological and tribological properties of model food systems that contained (1) microbubbles, (2) emulsion droplets or (3) no added colloidal structures. We used (a) liquids with thickener, (b)

  7. Frequency-Dependent Streaming Potentials: A Review

    Directory of Open Access Journals (Sweden)

    L. Jouniaux

    2012-01-01

    which both formation factor and permeability are measured, is predicted to depend on the permeability as inversely proportional to the permeability. We review the experimental setups built to be able to perform dynamic measurements. And we present some measurements and calculations of the dynamic streaming potential.

  8. Measurement of Redox Potential in Nanoecotoxicological Investigations

    Directory of Open Access Journals (Sweden)

    Ratna Tantra

    2012-01-01

    Full Text Available Redox potential has been identified by the Organisation for Economic Co-operation and Development (OECD as one of the parameters that should be investigated for the testing of manufactured nanomaterials. There is still some ambiguity concerning this parameter, i.e., as to what and how to measure, particularly when in a nanoecotoxicological context. In this study the redox potentials of six nanomaterials (either zinc oxide (ZnO or cerium oxide (CeO2 dispersions were measured using an oxidation-reduction potential (ORP electrode probe. The particles under testing differed in terms of their particle size and dispersion stability in deionised water and in various ecotox media. The ORP values of the various dispersions and how they fluctuate relative to each other are discussed. Results show that the ORP values are mainly governed by the type of liquid media employed, with little contributions from the nanoparticles. Seawater was shown to have reduced the ORP value, which was attributed to an increase in the concentration of reducing agents such as sulphites or the reduction of dissolved oxygen concentration. The lack of redox potential value contribution from the particles themselves is thought to be due to insufficient interaction of the particles at the Pt electrode of the ORP probe.

  9. Implicit Assumptions in High Potentials Recruitment

    Science.gov (United States)

    Posthumus, Jan; Bozer, Gil; Santora, Joseph C.

    2016-01-01

    Purpose: Professionals of human resources (HR) use different criteria in practice than they verbalize. Thus, the aim of this research was to identify the implicit criteria used for the selection of high-potential employees in recruitment and development settings in the pharmaceutical industry. Design/methodology/approach: A semi-structured…

  10. Antifungal potentials of Azardirachta indica and Ocimum ...

    African Journals Online (AJOL)

    Antifungal potentials of Azardirachta indica and Ocimum grattissimum leaf extracts in the control of yam rot. ... Fusarium oxysporium, Botryodiplodia theobromae, Rhizopus stolonifer, Penicilluim notatum and Aspergillus niger were isolated from the rotted yams. Both fresh and dry extracts of the leaves had significant effects ...

  11. Redox cycling of potential antitumor aziridinylquinones

    NARCIS (Netherlands)

    Lusthof, Klaas J.; de Mol, Nicolaas J.; Richter, Wilma; Janssen, Lambert H.M.; Butler, John; Hoey, Brigid M.; Verboom, Willem; Reinhoudt, David

    1992-01-01

    The formation of reactive oxygen intermediates (ROI) during redox cycling of newly synthetized potential antitumor 2,5-bis (1-aziridinyl)-1,4-benzoquinone (BABQ) derivatives has been studied by assaying the production of ROI (superoxide, hydroxyl radical, and hydrogen peroxide) by xanthine oxidase

  12. Immunomodulating potential of supplementation with probiotics

    DEFF Research Database (Denmark)

    Christensen, Hanne Risager; Larsen, C.N.; Kæstel, P.

    2006-01-01

    Certain probiotic microorganisms have been found beneficial in the treatment of immune-related diseases and may also affect immune function in healthy people. Intervention studies of probiotics in healthy humans are urgently required. Here, the immunomodulating potential of Bifidobacterium animalis...

  13. Antimicrobial activities, toxinogenic potential and sensitivity to ...

    African Journals Online (AJOL)

    This study was carried out to screen for antimicrobial activities against common pathogenic and food spoilage bacteria, yeasts and molds, toxinogenic potential and sensitivity to antibiotics of 26 Bacillus strains (11 Bacillus subtilis, 5 Bacillus megaterium, 4 Bacillus amyloliquefaciens, 4 Bacillus pumilus and 2 Bacillus ...

  14. Potential for forest products in interior Alaska.

    Science.gov (United States)

    George R. Sampson; Willem W.S. van Hees; Theodore S. Setzer; Richard C. Smith

    1988-01-01

    Future opportunities for producing Alaska forest products were examined from the perspective of timber supply as reported in timber inventory reports and past studies of forest products industry potential. The best prospects for increasing industrial production of forest products in interior Alaska are for softwood lumber. Current softwood lumber production in the...

  15. Upper Bounds for Mutations of Potentials

    Directory of Open Access Journals (Sweden)

    John Alexander Cruz Morales

    2013-01-01

    Full Text Available In this note we provide a new, algebraic proof of the excessive Laurent phenomenon for mutations of potentials (in the sense of [Galkin S., Usnich A., Preprint IPMU 10-0100, 2010] by introducing to this theory the analogue of the upper bounds from [Berenstein A., Fomin S., Zelevinsky A., Duke Math. J. 126 (2005, 1-52].

  16. Bio-SNG potential assessment: Denmark 2020

    DEFF Research Database (Denmark)

    Ahrenfeldt, Jesper; Jørgensen, Betina; Thomsen, Tobias

    In this project the potential for SNG based on biomass gasification has been sought elucidated. As part of the project a model for simulation of biomass in Denmark has been developed. The conclusion is that SNG can substitute a significant amount of natural gas, but the energy efficiency should...

  17. Weak gravitational field and Coriolis potential

    Indian Academy of Sciences (India)

    relativistic limit to show the role of Coriolis potential in passages from one rotating frame to another both in relativistic and non-relativistic mechanics of mass point. To this end we use a coordinate system with one of the coordinates being azimuthal angle ϕ such that ∂ϕ is the Killing vector. Then passage to a frame rotating ...

  18. Estimating the potential gains from mergers

    DEFF Research Database (Denmark)

    Bogetoft, Peter; Wang, Dexiang

    2005-01-01

    We introduce simple production economic models to estimate the potential gains from mergers. We decompose the gains into technical ef¿ciency, size (scale) and harmony (mix) gains, and we discuss alternative ways to capture these gains. We propose to approximate the production processes using...

  19. Potential gains from hospital mergers in Denmark.

    Science.gov (United States)

    Kristensen, Troels; Bogetoft, Peter; Pedersen, Kjeld Moeller

    2010-12-01

    The Danish hospital sector faces a major rebuilding program to centralize activity in fewer and larger hospitals. We aim to conduct an efficiency analysis of hospitals and to estimate the potential cost savings from the planned hospital mergers. We use Data Envelopment Analysis (DEA) to estimate a cost frontier. Based on this analysis, we calculate an efficiency score for each hospital and estimate the potential gains from the proposed mergers by comparing individual efficiencies with the efficiency of the combined hospitals. Furthermore, we apply a decomposition algorithm to split merger gains into technical efficiency, size (scale) and harmony (mix) gains. The motivation for this decomposition is that some of the apparent merger gains may actually be available with less than a full-scale merger, e.g., by sharing best practices and reallocating certain resources and tasks. Our results suggest that many hospitals are technically inefficient, and the expected "best practice" hospitals are quite efficient. Also, some mergers do not seem to lower costs. This finding indicates that some merged hospitals become too large and therefore experience diseconomies of scale. Other mergers lead to considerable cost reductions; we find potential gains resulting from learning better practices and the exploitation of economies of scope. To ensure robustness, we conduct a sensitivity analysis using two alternative returns-to-scale assumptions and two alternative estimation approaches. We consistently find potential gains from improving the technical efficiency and the exploitation of economies of scope from mergers.

  20. The relativistic geoid: redshift and acceleration potential

    Science.gov (United States)

    Philipp, Dennis; Lämmerzahl, Claus; Puetzfeld, Dirk; Hackmann, Eva; Perlick, Volker

    2017-04-01

    We construct a relativistic geoid based on a time-independent redshift potential, which foliates the spacetime into isochronometric surfaces. This relativistic potential coincides with the acceleration potential for isometric congruences. We show that the a- and u- geoid, defined in a post-Newtonian framework, coincide also in a more general setup. Known Newtonian and post-Newtonian results are recovered in the respective limits. Our approach offers a relativistic definition of the Earth's geoid as well as a description of the Earth itself (or observers on its surface) in terms of an isometric congruence. Being fully relativistic, this notion of a geoid can also be applied to other compact objects such as neutron stars. By definition, this relativistic geoid can be determined by a congruence of Killing observers equipped with standard clocks by comparing their frequencies as well as by measuring accelerations of objects that follow the congruence. The redshift potential gives the correct result also for frequency comparison through optical fiber links as long as the fiber is at rest w.r.t. the congruence. We give explicit expressions for the relativistic geoid in the Kerr spacetime and the Weyl class of spacetimes. To investigate the influence of higher order mass multipole moments we compare the results for the Schwarzschild case to those obtained for the Erez-Rosen and q-metric spacetimes.

  1. Economic analysis of potential fuelwood sources

    Science.gov (United States)

    W.F. Watson; J.R. Ragan; T.J. Straka; B.J. Stokes

    1987-01-01

    Fuelwood can be producsd from mill residues, logging residues, or energy plantations. This paper will compare the last two sources on the basis of potential for productlon and expected costs at the various levels of productfon. Prospects for improving the production of fuelwood frw each source will also be examined.

  2. Quantifying the transmission potential of pandemic influenza

    Science.gov (United States)

    Chowell, Gerardo; Nishiura, Hiroshi

    2008-03-01

    This article reviews quantitative methods to estimate the basic reproduction number of pandemic influenza, a key threshold quantity to help determine the intensity of interventions required to control the disease. Although it is difficult to assess the transmission potential of a probable future pandemic, historical epidemiologic data is readily available from previous pandemics, and as a reference quantity for future pandemic planning, mathematical and statistical analyses of historical data are crucial. In particular, because many historical records tend to document only the temporal distribution of cases or deaths (i.e. epidemic curve), our review focuses on methods to maximize the utility of time-evolution data and to clarify the detailed mechanisms of the spread of influenza. First, we highlight structured epidemic models and their parameter estimation method which can quantify the detailed disease dynamics including those we cannot observe directly. Duration-structured epidemic systems are subsequently presented, offering firm understanding of the definition of the basic and effective reproduction numbers. When the initial growth phase of an epidemic is investigated, the distribution of the generation time is key statistical information to appropriately estimate the transmission potential using the intrinsic growth rate. Applications of stochastic processes are also highlighted to estimate the transmission potential using similar data. Critically important characteristics of influenza data are subsequently summarized, followed by our conclusions to suggest potential future methodological improvements.

  3. Investigating the sourdough potential for enhance microbiological ...

    African Journals Online (AJOL)

    Jane

    2011-04-25

    Apr 25, 2011 ... In this study, potential effects of sourdough on microbiological shelf life and roasty aroma of traditional. Lavash bread were studied. For investigating the biopreservation effect of sourdough, after intentional contamination of flour with hygiene indicator microorganisms that cause mouldiness and ropiness,.

  4. Comparative anatomy, nutraceutical potentials and heavy metal ...

    African Journals Online (AJOL)

    This study investigated the anatomical features, nutraceutical potentials and heavy metal compositions in two varieties of Lasianthera africana (P. Beauv) which is a member of the family Icacinaceae predominantly found mostly in southern Nigeria. The anatomical studies were carried out with free hand sectioning using a ...

  5. Toxic Potential of Carcinogenic Polycyclic Aromatic Hydrocarbons ...

    African Journals Online (AJOL)

    This article is focused on ascertaining the toxic potentials of heavy metals and the levels of PAHs and cPAHs in crude oil samples from Gokana area and using the data to determine the carcinogenicity (toxicity) of the cPAHs in the crude oil. All the cPAHs namely; benzo (a) pyrene, benzo (a) Anthracene, benzo (b) ...

  6. Alexithymia and the brain potential P300

    NARCIS (Netherlands)

    Bermond, B.; Righart, R.; Ridderinkhof, K.R.; Moormann, P.P.

    2008-01-01

    Background: The P300 is an event-related potential occurring at about 300 ms post-stimulus. The P300 covaries in amplitude with the perceived significance of the stimulus as well as with its emotional valence. Alexithymia refers to severe reductions in the cognitive as well as affective components

  7. ORIGINAL ARTICLES Potential for nosocomial transmission of ...

    African Journals Online (AJOL)

    Tropical Disease Hospital,2 neonates in a kangaroo mother care unit,3 ... estimate the potential for nosocomial transmission. Methods. This was a descriptive study based on retrospective review of patient records and laboratory data, and included all adult ... method.6 All tests were carried out in an accredited laboratory.

  8. Timing of potential and metabolic brain energy

    DEFF Research Database (Denmark)

    Korf, Jakob; Gramsbergen, Jan Bert

    2007-01-01

    The temporal relationship between cerebral electro-physiological activities, higher brain functions and brain energy metabolism is reviewed. The duration of action potentials and transmission through glutamate and GABA are most often less than 5 ms. Subjects may perform complex psycho-physiologic...

  9. Yield potential of pigeon pea cultivars

    Science.gov (United States)

    Yield potential of twelve vegetable pigeon pea (Cajanus cajun) cultivars was evaluated at two locations in eastern Kenya during 2012 and 2013 cropping years. Pigeon pea pod numbers, seeds per pod, seed mass, grain yield and shelling percentage were quantified in three replicated plots, arranged in a...

  10. Transmembrane voltage: Potential to induce lateral microdomains.

    Czech Academy of Sciences Publication Activity Database

    Malínský, Jan; Tanner, W.; Opekarová, Miroslava

    2016-01-01

    Roč. 1861, č. 8 (2016), s. 806-811 ISSN 1388-1981 R&D Projects: GA ČR(CZ) GA15-10641S Institutional support: RVO:68378041 Keywords : membrane microdomain * membrane potential * fluorescence spectroscopy * membrane structure * fluorescence microscopy Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 5.547, year: 2016

  11. Energy transfer in scattering by rotating potentials

    Indian Academy of Sciences (India)

    Quantum mechanical scattering theory is studied for time-dependent Schrödinger operators, in particular for particles in a rotating potential. Under various assumptions about the decay rate at infinity we show uniform boundedness in time for the kinetic energy of scattering states, existence and completeness of wave ...

  12. Evaluation of phytoremediation potential of Peltophorum ...

    African Journals Online (AJOL)

    An ecological study was carried out to evaluate remediation potential of three hydrocarbon tolerant species (Peltophorum pterocarpum (DC.) Heyne, Leucaena leucocephala (Lam.) De Wit., and Crotolaria retusa Linn) of Fabaceae plant family in relation to enzyme activity for cleaning up soils contaminated with waste oil ...

  13. Timing of potential and metabolic brain energy

    NARCIS (Netherlands)

    Korf, Jakob; Gramsbergen, Jan Bert

    2007-01-01

    The temporal relationship between cerebral electro-physiological activities, higher brain functions and brain energy metabolism is reviewed. The duration of action potentials and transmission through glutamate and GABA are most often less than 5 ms. Subjects may perform complex psycho-physiological

  14. SOCIAL ENTERPRISES - FROM POTENTIAL TO IMPACT

    Directory of Open Access Journals (Sweden)

    Bucaciuc Anamaria

    2015-07-01

    Full Text Available Social economy is seen by many as the magical solution to the social and economic problems which came over time with each economic crisis. An important problem when dealing with social problems is however the need to find solutions which would work at large scale. As Lisbeth Schorr stated “We have learned to create the small exceptions that can change the lives of hundreds. But we have not learned how to make the exceptions the rule to change the lives of millions”. This not only rises the importance of social enterprises but also the necessity of a more strategic and systematic approach to the problem of spreading social innovation. The potential of a social enterprise, connected with the further assessment of its impact is an important correlation which needs further studies. It is one thing for social enterprises to exhibit a great potential, but it is another for that potential to be realized and to produce significant benefits for its target group. Even if the potential of social enterprises is generally known, and this is the reason for which social enterprises benefit from a lot of attention and support, within the literature existing on the social enterprises, the issue of its’ potential is not dealt sufficiently. On the other hand, impact assessment has been studied largely within the literature. This is maybe also because evaluation of social impact is a challenging endeavour for any person analysing a social enterprise, assessing subtle changes which are difficult to be measured, evaluated and traced back to specific events. The impact assessment, made through critical and interpretative accounting theories (which are contextual, seek for engagement, are concerned with micro and macro levels and are interdisciplinary, indicates that the evaluation of the social enterprises’ socio-economic impact can have a base on the positivist, critical and interpretative accounting approaches. However, despite the enthusiasm shown for

  15. Drought, Climate Change and Potential Agricultural Productivity

    Science.gov (United States)

    Sheffield, J.; Herrera-Estrada, J. E.; Caylor, K. K.; Wood, E. F.

    2011-12-01

    Drought is a major factor in agricultural productivity, especially in developing regions where the capacity for water resources management is limited and climate variability ensures that drought is recurrent and problematic. Recent events in East Africa are testament to this, where drought conditions that have slowly developed over multiple years have contributed to reduced productivity and ultimately food crises and famine. Prospects for the future are not promising given ongoing problems of dwindling water supplies from non-renewable sources and the potential for increased water scarcity and increased drought with climate change. This is set against the expected increase in population by over 2 billion people by 2050 and rise in food demand, coupled with changes in demographics that affect food choices and increases in non-food agriculture. In this talk we discuss the global variability of drought over the 20th century and recent years, and the projected changes over the 21st century, and how this translates into changes in potential agricultural productivity. Drought is quantified using land surface hydrological models driven by a hybrid reanalysis-observational meteorological forcing dataset. Drought is defined in terms of anomalies of hydroclimatic variables, in particular precipitation, evaporation and soil moisture, and we calculate changes in various drought characteristics. Potential agricultural productivity is derived from the balance of precipitation to crop water demand, where demand is based on potential evaporation and crop coefficients for a range of staple crops. Some regional examples are shown of historic variations in drought and potential productivity, and the estimated water deficit for various crops. The multitude of events over the past decade, including heat waves in Europe, fires in Russia, long-term drought in northern China, southeast Australia, the Western US and a series of droughts in the Amazon and Argentina, hint at the influence of

  16. Evaluation of groundwater potential using geospatial techniques

    Science.gov (United States)

    Hussein, Abdul-Aziz; Govindu, Vanum; Nigusse, Amare Gebre Medhin

    2017-09-01

    The issue of unsustainable groundwater utilization is becoming increasingly an evident problem and the key concern for many developing countries. One of the problems is the absence of updated spatial information on the quantity and distribution of groundwater resource. Like the other developing countries, groundwater evaluation in Ethiopia has been usually conducted using field survey which is not feasible in terms of time and resource. This study was conducted in Northern Ethiopia, Wollo Zone, in Gerardo River Catchment district to spatially delineate the groundwater potential areas using geospatial and MCDA tools. To do so, eight major biophysical and environmental factors like geomorphology, lithology, slope, rainfall, land use land cover (LULC), soil, lineament density and drainage density were considered. The sources of these data were satellite image, digital elevation model (DEM), existing thematic maps and metrological station data. Landsat image was used in ERDAS Imagine to drive the LULC of the area, while the geomorphology, soil, and lithology of the area were identified and classified through field survey and digitized from existing maps using the ArcGIS software. The slope, lineament and drainage density of the area were derived from DEM using spatial analysis tools. The rainfall surface map was generated using the thissen polygon interpolation. Finally, after all these thematic maps were organized, weighted value determination for each factor and its field value was computed using IDRSI software. At last, all the factors were integrated together and computed the model using the weighted overlay so that potential groundwater areas were mapped. The findings depicted that the most potential groundwater areas are found in the central and eastern parts of the study area, while the northern and western parts of the Gerado River Catchment have poor potential of groundwater availability. This is mainly due to the cumulative effect of steep topographic and

  17. The Potential of Modern Russian Generations

    Directory of Open Access Journals (Sweden)

    Valentina Grigor’evna Dobrokhleb

    2016-05-01

    Full Text Available The paper considers the necessity of socio-demographic approach to assessing the potential of modern generations. The demographic potential of generations is determined by their number, their share in total population, and their life expectancy. Their economic potential is determined by the proportion of representatives of different generations in total employment. Their social potential is determined by the system of values of generations. The rapid growth of differences in these characteristics leads to the break up of intergenerational relations and is connected with the aggravation of social contradictions. The potential of modern generations can be considered in different aspects: number of generations, life expectancy at birth, the share of representatives of different generations that share or do not share the basic social values of the society, including values related to reproductive and other types of demographic behavior. In order to identify existing differences between generations in the framework of the socio-demographic approach, the paper analyzes the dynamics of the number of young people in 1926, 1936, 2014 in the Russian Federation; the authors also carry out a comparative analysis of the secondary and authors’ sociological data of values-related and reproductive attitudes of conditionally parental and child generations. Russian researchers studied the life potential of the population and proved that in 1990–2010, the life potential of Russia’s population decreased. Reduction in the life potential in the population in general is associated with a decrease in this indicator for the younger generation (children’s ages due to the reduction in the number and proportion of this generation in the population structure. The reduction in the life potential has not stopped because the number of the younger generation continues to decrease. However, life expectancy in this period increased. Nevertheless, in general, mortality in

  18. Mapping ecosystem services potential in Lithuania

    Science.gov (United States)

    Depellegrin, Daniel; Misiune, Ieva; Pereira, Paulo

    2016-04-01

    Ecosystem services (ES) are understood as the benefits that humans get from ecosystems functions. They are divided in providing, regulating, supporting and cultural. The correct management of ES is fundamental to achieve sustainable development goals. A good assessment of ES potential can be obtained using GIS techniques, in order to have a spatial dimension of ES distribution. This will help to have a better territorial planning, improve ES capacity, and have more benefits. ES potential analysis can be carried out based on the ES matrix developed by Burkhard et al. (2009). This method is based on the attribution a rank from 0 to 5 (0= no capacity to 5=very high relevant capacity) to the land use classes of the corine land cover (CLC). This represents an important advantage since a determined land use can be related with a certain number of services. The objective of this work is to Map the ES potential in Lithuania. The results showed that Lithuania has a high potential for regulating services, followed by cultural and provisioning services. Urban areas provide a very small amount of services, contrary to forest, where the highest potential is observed. The most comon land covers in Lithuania are non-irrigated arable land, complex cultivation patterns, mixed and coniferous forest. Total and regulating and cultural ES had dispersed pattern showing that they are scattered in the territory. They are located mainly in forested and coastal areas. In relation to provisioning services they had a clustered distribution, and they were mainly observed in the central part of Lithuania. References Burkhard B, Kroll F, Müller F, Windhorst W. 2009. Landscapes' capacities to provide ecosystem services - a concept for land-cover based assessments. Landsc. Online. 15:1-22

  19. Phonon optimized interatomic potential for aluminum

    Science.gov (United States)

    Muraleedharan, Murali Gopal; Rohskopf, Andrew; Yang, Vigor; Henry, Asegun

    2017-12-01

    We address the problem of generating a phonon optimized interatomic potential (POP) for aluminum. The POP methodology, which has already been shown to work for semiconductors such as silicon and germanium, uses an evolutionary strategy based on a genetic algorithm (GA) to optimize the free parameters in an empirical interatomic potential (EIP). For aluminum, we used the Vashishta functional form. The training data set was generated ab initio, consisting of forces, energy vs. volume, stresses, and harmonic and cubic force constants obtained from density functional theory (DFT) calculations. Existing potentials for aluminum, such as the embedded atom method (EAM) and charge-optimized many-body (COMB3) potential, show larger errors when the EIP forces are compared with those predicted by DFT, and thus they are not particularly well suited for reproducing phonon properties. Using a comprehensive Vashishta functional form, which involves short and long-ranged interactions, as well as three-body terms, we were able to better capture interactions that reproduce phonon properties accurately. Furthermore, the Vashishta potential is flexible enough to be extended to Al2O3 and the interface between Al-Al2O3, which is technologically important for combustion of solid Al nano powders. The POP developed here is tested for accuracy by comparing phonon thermal conductivity accumulation plots, density of states, and dispersion relations with DFT results. It is shown to perform well in molecular dynamics (MD) simulations as well, where the phonon thermal conductivity is calculated via the Green-Kubo relation. The results are within 10% of the values obtained by solving the Boltzmann transport equation (BTE), employing Fermi's Golden Rule to predict the phonon-phonon relaxation times.

  20. Phonon optimized interatomic potential for aluminum

    Directory of Open Access Journals (Sweden)

    Murali Gopal Muraleedharan

    2017-12-01

    Full Text Available We address the problem of generating a phonon optimized interatomic potential (POP for aluminum. The POP methodology, which has already been shown to work for semiconductors such as silicon and germanium, uses an evolutionary strategy based on a genetic algorithm (GA to optimize the free parameters in an empirical interatomic potential (EIP. For aluminum, we used the Vashishta functional form. The training data set was generated ab initio, consisting of forces, energy vs. volume, stresses, and harmonic and cubic force constants obtained from density functional theory (DFT calculations. Existing potentials for aluminum, such as the embedded atom method (EAM and charge-optimized many-body (COMB3 potential, show larger errors when the EIP forces are compared with those predicted by DFT, and thus they are not particularly well suited for reproducing phonon properties. Using a comprehensive Vashishta functional form, which involves short and long-ranged interactions, as well as three-body terms, we were able to better capture interactions that reproduce phonon properties accurately. Furthermore, the Vashishta potential is flexible enough to be extended to Al2O3 and the interface between Al-Al2O3, which is technologically important for combustion of solid Al nano powders. The POP developed here is tested for accuracy by comparing phonon thermal conductivity accumulation plots, density of states, and dispersion relations with DFT results. It is shown to perform well in molecular dynamics (MD simulations as well, where the phonon thermal conductivity is calculated via the Green-Kubo relation. The results are within 10% of the values obtained by solving the Boltzmann transport equation (BTE, employing Fermi’s Golden Rule to predict the phonon-phonon relaxation times.

  1. RECORDING OF VESTIBULAR EVOKED MYOGENIC POTENTIALS

    Directory of Open Access Journals (Sweden)

    A. A. Sazgar

    2006-05-01

    Full Text Available It has been shown recently that loud clicks evoke myogenic potentials in the tonically contracting sternocleidomastoid muscles. Studies have suggested that these potentials are of vestibular origin, especially of the saccule and inferior vestibular nerve. A pilot study was undertaken in our hospital to record vestibular evoked myogenic potentials (VEMP for the first time in Iran. Eighteen healthy volunteers (32 ears without history of otologic or vestibular disorders were subjected to the VEMP test. Twenty-one patients (26 ears with unilateral (6 patients and bilateral (5 patients high frequency sensorineural hearing loss with unknown etiology, acoustic neuroma (1 patient, Meniere’s disease (4 patients and unilateral low frequency sensorineural hearing loss without vestibular complaint (5 patients were also enrolled in this study. VEMP response to clicks was obtained from 84.4% of ears of healthy subjects. These subjects demonstrated short latency waves to click stimuli during tonic neck flexor activation. Mean latencies of first positive (p13 and first negative (n23 potentials in healthy subjects were 12.45 ± 1.9 ms and 20.8 ± 3.5 ms, respectively. Median latencies of these two potentials were 12.1 and 19.3 ms, respectively. We could record VEMP in 5 patients with unilateral and all patients with high and low frequency sensorineural hearing loss without vestibular complaint. In the patient with acoustic neuroma VEMP was absent on the affected side. This technique may offer a new method to evaluate otolith and sacculocollic pathways in human.

  2. DESIGN OF THE CONTACT POTENTIALS DIFFERENCE PROBES

    Directory of Open Access Journals (Sweden)

    K. U. Pantsialeyeu

    2016-01-01

    Full Text Available The contact potential difference probes distinguished by great variety and produced mostly in the laboratory for specific experimental applications. As a rule, they consist of commercially available instrumentation, and have a number of disadvantages: large dimensions, complexity and high cost, small sensitivity, operating speed, noiseproof, etc. The purpose of this paper is to describe the basic approaches to design of the small dimension, complete contact potential difference probes, providing high sensitivity, operating speed, and noise immunity. In this paper the contact potential difference probe, which is a electrometer with dynamic capacitor plate at about 0.1–5 mm2 . These probes are could be used in scanning systems, such as a Scanning Kelvin Probe, as well as for controlling system of manufacturing processes, e.g. under friction. The design of such contact potential difference probes conducted using modern electronic components, unique circuitry and design solutions described in detail at paper. The electromechanical modulator applied for mechanical vibrations of the reference sample. To provide a high amplitude and phase stability the upgraded generator with Wien bridge was used instead traditional oscillation sensor. The preamplifier made on the base of modern operational amplifiers with femtoampere current input. The power of the preamplifier designed with «floating ground». It allows keeping the relation constant potential to the probe components when changing over a wide range the compensation voltage. The phase detector-integrator based on the electronic antiphase switches with the modulation frequency of the contact potential difference and the integrator. Fullwave phase detection would greatly increase the sensitivity of the probe. In addition, the application of the phase detection allows suppressing noise and crosstalk at frequencies different from the modulation frequency. The preamplifier and the reference sample

  3. Energy potential of the modified excess sludge

    Directory of Open Access Journals (Sweden)

    Zawieja Iwona

    2017-01-01

    Full Text Available On the basis of the SCOD value of excess sludge it is possible to estimate an amount of energy potentially obtained during the methane fermentation process. Based on a literature review, it has been estimated that from 1 kg of SCOD it is possible to obtain 3.48 kWh of energy. Taking into account the above methane and energy ratio (i.e. 10 kWh/1Nm3 CH4, it is possible to determine the volume of methane obtained from the tested sludge. Determination of potential energy of sludge is necessary for the use of biogas as a source of power generators as cogeneration and ensure the stability of this type of system. Therefore, the aim of the study was to determine the energy potential of excess sludge subjected to the thermal and chemical disintegration. In the case of thermal disintegration, test was conducted in the low temperature 80°C. The reagent used for the chemical modification was a peracetic acid, which in an aqueous medium having strong oxidizing properties. The time of chemical modification was 6 hours. Applied dose of the reagent was 1.0 ml CH3COOOH/L of sludge. By subjecting the sludge disintegration by the test methods achieved an increase in the SCOD value of modified sludge, indicating the improvement of biodegradability along with a concomitant increase in their energy potential. The obtained experimental production of biogas from disintegrated sludge confirmed that it is possible to estimate potential intensity of its production. The SCOD value of 2576 mg O2/L, in the case of chemical disintegration, was obtained for a dose of 1.0 ml CH3COOH/L. For this dose the pH value was equal 6.85. In the case of thermal disintegration maximum SCOD value was 2246 mg O2/L obtained at 80°C and the time of preparation 6 h. It was estimated that in case of thermal disintegration as well as for the chemical disintegration for selected parameters, the potential energy for model digester of active volume of 5L was, respectively, 0.193 and 0,118 kWh.

  4. Towards a rational definition of potential evaporation

    Directory of Open Access Journals (Sweden)

    J.-P. Lhommel

    1997-01-01

    Full Text Available The concept of potential evaporation is defined on the basis of the following criteria: (i it must establish an upper limit to the evaporation process in a given environment (the term 'environment' including meteorological and surface conditions, and (ii this upper limit must be readily calculated from measured input data. It is shown that this upper limit is perfectly defined and is given by the Penman equation, applied with the corresponding meteorological data (incoming radiation and air characteristics measured at a reference height and the appropriate surface characteristics (albedo, roughness length, soil heat flux. Since each surface has its own potential evaporation, a function of its own surface characteristics, it is useful to define a reference potential evaporation as a short green grass completely shading the ground. Although the potential evaporation from a given surface is readily calculated from the Penman equation, its physical significance or interpretation is not so straightforward, because it represents only an idealized situation, not a real one. Potential evaporation is the evaporation from this surface, when saturated and extensive enough to obviate any effect of local advection, under the same meteorological conditions. Due to the feedback effects of evaporation on air characteristics, it does not represent the 'real' evaporation (i.e. the evaporation which could be physically observed in the real world from such an extensive saturated surface in these given meteorological conditions (if this saturated surface were substituted for an unsaturated one previously existing. From a rigorous standpoint, this calculated potential evaporation is not physically observable. Nevertheless, an approximate representation can be given by the evaporation from a limited saturated area, the dimension of which depends on the height of measurement of the air characteristics used as input in the Penman equation. If they are taken at a height

  5. Energy potential of the modified excess sludge

    Science.gov (United States)

    Zawieja, Iwona

    2017-11-01

    On the basis of the SCOD value of excess sludge it is possible to estimate an amount of energy potentially obtained during the methane fermentation process. Based on a literature review, it has been estimated that from 1 kg of SCOD it is possible to obtain 3.48 kWh of energy. Taking into account the above methane and energy ratio (i.e. 10 kWh/1Nm3 CH4), it is possible to determine the volume of methane obtained from the tested sludge. Determination of potential energy of sludge is necessary for the use of biogas as a source of power generators as cogeneration and ensure the stability of this type of system. Therefore, the aim of the study was to determine the energy potential of excess sludge subjected to the thermal and chemical disintegration. In the case of thermal disintegration, test was conducted in the low temperature 80°C. The reagent used for the chemical modification was a peracetic acid, which in an aqueous medium having strong oxidizing properties. The time of chemical modification was 6 hours. Applied dose of the reagent was 1.0 ml CH3COOOH/L of sludge. By subjecting the sludge disintegration by the test methods achieved an increase in the SCOD value of modified sludge, indicating the improvement of biodegradability along with a concomitant increase in their energy potential. The obtained experimental production of biogas from disintegrated sludge confirmed that it is possible to estimate potential intensity of its production. The SCOD value of 2576 mg O2/L, in the case of chemical disintegration, was obtained for a dose of 1.0 ml CH3COOH/L. For this dose the pH value was equal 6.85. In the case of thermal disintegration maximum SCOD value was 2246 mg O2/L obtained at 80°C and the time of preparation 6 h. It was estimated that in case of thermal disintegration as well as for the chemical disintegration for selected parameters, the potential energy for model digester of active volume of 5L was, respectively, 0.193 and 0,118 kWh.

  6. Morse potential, symmetric Morse potential and bracketed bound-state energies

    Czech Academy of Sciences Publication Activity Database

    Znojil, Miloslav

    2016-01-01

    Roč. 31, č. 14 (2016), s. 1650088 ISSN 0217-7323 R&D Projects: GA ČR GA16-22945S Institutional support: RVO:61389005 Keywords : quantum bound states * special functions * Morse potential * symmetrized Morse potential * upper and lower energy estimates * computer-assisted symbolic manipulations Subject RIV: BE - Theoretical Physics Impact factor: 1.165, year: 2016

  7. Statically screened ion potential and Bohm potential in a quantum plasma

    Energy Technology Data Exchange (ETDEWEB)

    Moldabekov, Zhandos [Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstraße 15, 24098 Kiel (Germany); Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Str., 050040 Almaty (Kazakhstan); Schoof, Tim; Ludwig, Patrick; Bonitz, Michael [Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstraße 15, 24098 Kiel (Germany); Ramazanov, Tlekkabul [Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi Str., 050040 Almaty (Kazakhstan)

    2015-10-15

    The effective potential Φ of a classical ion in a weakly correlated quantum plasma in thermodynamic equilibrium at finite temperature is well described by the random phase approximation screened Coulomb potential. Additionally, collision effects can be included via a relaxation time ansatz (Mermin dielectric function). These potentials are used to study the quality of various statically screened potentials that were recently proposed by Shukla and Eliasson (SE) [Phys. Rev. Lett. 108, 165007 (2012)], Akbari-Moghanjoughi (AM) [Phys. Plasmas 22, 022103 (2015)], and Stanton and Murillo (SM) [Phys. Rev. E 91, 033104 (2015)] starting from quantum hydrodynamic (QHD) theory. Our analysis reveals that the SE potential is qualitatively different from the full potential, whereas the SM potential (at any temperature) and the AM potential (at zero temperature) are significantly more accurate. This confirms the correctness of the recently derived [Michta et al., Contrib. Plasma Phys. 55, 437 (2015)] pre-factor 1/9 in front of the Bohm term of QHD for fermions.

  8. On the potential of redox potential measurements for the characterization of greenhouse gas emissions - preliminary results

    Science.gov (United States)

    Wang, Jihuan; Bogena, Heye; Brüggemann, Nicolas

    2017-04-01

    Soil greenhouse gas (GHG) emissions contribute to global warming. In order to support mitigation measures against global warming it is important to understand the controlling processes of GHG emissions. Previous studies focused mainly on the paddy rice fields or wetlands showed a strong relationship between soil redox potential and GHG emission (e.g. N2O). Recent sensor developments open the possibility for the long-term monitoring of field scale soil redox potential changes. Here, we performed laboratory lysimeter experiments to investigate how changes in the redox potential, induced by changes in the water level, affect GHG emissions from agricultural soil. Under our experimental conditions, we found that N2O emissions followed closely the changes in redox potential. The dynamics of redox potential were induced by changing the water-table depth in a laboratory lysimeter. During saturated conditions we found a clear negative correlation between redox potentials and N2O emission rates N2O. After switching from saturated to unsaturated conditions, N2O emission quickly decreased. In contrast, the emissions of CO2 increased with increasing soil redox potentials. The level of N2O emission also depended on the fertilization level of the soil. We propose that redox potential measurements are a viable method for better understanding of the controlling factors of GHG emission and the development agricultural management practices to reduce such emissions.

  9. Accuracy of Protein Embedding Potentials: An Analysis in Terms of Electrostatic Potentials

    DEFF Research Database (Denmark)

    Olsen, Jogvan Magnus Haugaard; List, Nanna Holmgaard; Kristensen, Kasper

    2015-01-01

    of an inaccurate embedding potential. In this paper, we investigate in detail the quality of the electronic component of embedding potentials designed for calculations on protein biostructures. We show that very accurate explicitly polarizable embedding potentials may be efficiently designed using fragmentation...... strategies combined with single-fragment ab initio calculations. In fact, due to the self-interaction error in Kohn–Sham density functional theory (KS-DFT), use of large full-structure quantum-mechanical calculations based on conventional (hybrid) functionals leads to less accurate embedding potentials than...... fragment-based approaches. We also find that standard protein force fields yield poor embedding potentials, and it is therefore not advisable to use such force fields in general QM/MM-type calculations of molecular properties other than energies and structures....

  10. Canonical problems in scattering and potential theory

    CERN Document Server

    Vinogradov, SS; Vinogradova, ED

    2002-01-01

    Although the analysis of scattering for closed bodies of simple geometric shape is well developed, structures with edges, cavities, or inclusions have seemed, until now, intractable to analytical methods. This two-volume set describes a breakthrough in analytical techniques for accurately determining diffraction from classes of canonical scatterers with comprising edges and other complex cavity features. It is an authoritative account of mathematical developments over the last two decades that provides benchmarks against which solutions obtained by numerical methods can be verified.The first volume, Canonical Structures in Potential Theory, develops the mathematics, solving mixed boundary potential problems for structures with cavities and edges. The second volume, Acoustic and Electromagnetic Diffraction by Canonical Structures, examines the diffraction of acoustic and electromagnetic waves from several classes of open structures with edges or cavities. Together these volumes present an authoritative and uni...

  11. Canonical problems in scattering and potential theory

    CERN Document Server

    Vinogradov, SS; Vinogradova, ED

    2001-01-01

    Although the analysis of scattering for closed bodies of simple geometric shape is well developed, structures with edges, cavities, or inclusions have seemed, until now, intractable to analytical methods. This two-volume set describes a breakthrough in analytical techniques for accurately determining diffraction from classes of canonical scatterers with comprising edges and other complex cavity features. It is an authoritative account of mathematical developments over the last two decades that provides benchmarks against which solutions obtained by numerical methods can be verified.The first volume, Canonical Structures in Potential Theory, develops the mathematics, solving mixed boundary potential problems for structures with cavities and edges. The second volume, Acoustic and Electromagnetic Diffraction by Canonical Structures, examines the diffraction of acoustic and electromagnetic waves from several classes of open structures with edges or cavities. Together these volumes present an authoritative and uni...

  12. Vehicle to Grid Services: Potential and Applications

    Directory of Open Access Journals (Sweden)

    Saeed Lotfifard

    2012-10-01

    Full Text Available Electric Vehicle (EV technology is expected to take a major share in the light-vehicle market in the coming decades. Charging of EVs will put an extra burden on the distribution grid and in some cases adjustments will need to be made. On the other hand, EVs have the potential to support the grid under various conditions. This paper studies possible potential and applications of Vehicle to Grid (V2G services, including active power services, which discharge the EV batteries, and power quality services, which do not engage the battery or require only small amounts of battery charge. The advantages and disadvantages of each service and the likelihood that a given service will be effective and beneficial for the grid in the future are discussed. Further, the infrastructure cost, duration, and value of V2G services are compared qualitatively.

  13. Electric potential and electric field imaging

    Science.gov (United States)

    Generazio, E. R.

    2017-02-01

    The technology and methods for remote quantitative imaging of electrostatic potentials and electrostatic fields in and around objects and in free space is presented. Electric field imaging (EFI) technology may be applied to characterize intrinsic or existing electric potentials and electric fields, or an externally generated electrostatic field made be used for "illuminating" volumes to be inspected with EFI. The baseline sensor technology (e-Sensor) and its construction, optional electric field generation (quasi-static generator), and current e-Sensor enhancements (ephemeral e-Sensor) are discussed. Demonstrations for structural, electronic, human, and memory applications are shown. This new EFI capability is demonstrated to reveal characterization of electric charge distribution creating a new field of study embracing areas of interest including electrostatic discharge (ESD) mitigation, crime scene forensics, design and materials selection for advanced sensors, dielectric morphology of structures, tether integrity, organic molecular memory, and medical diagnostic and treatment efficacy applications such as cardiac polarization wave propagation and electromyography imaging.

  14. Hydropower potential of the lower Vistula

    Directory of Open Access Journals (Sweden)

    Michał Szydłowski

    2015-03-01

    Full Text Available This paper presents an estimate analysis of the hydropower potential of the lower Vistula River from Warsaw to Gdańsk Bay. The calculations were made for a hydraulic model of the lower Vistula which takes into account potential development of barrages in a cascade system. Results obtained from the model simulations and from hydrological calculations were used to estimate the power of hydropower plants and the average annual energy output from the entire cascade system. The results of calculations indicate significant energy benefits resulting from the development of a cascade of hydropower plants in the lower Vistula. This study does not discuss the cascade project’s economic viability or other aspects of its development (inland waterways, flood control, etc..

  15. The Democratic Potential of Theatre Talks

    DEFF Research Database (Denmark)

    Hansen, Louise Ejgod

    2014-01-01

    The article discusses and analyses the democratic potential of theatre-going within the framework of cultural policy. Theoretically the article is based on three different approaches: theatre research on the link between theatre and democracy, cultural policy research on the strategy...... of democratization of culture and the democracy theory by James S. Fishkin. The analysis is based on the empirical material of 31 theatre talks carried through as a part of an audience development project and is focused on four different aspects of the democratic potential of theatre: First, how the theatre talks...... give the participants the opportunity to reflect on the experience and thus gain a better understanding of the theatrical event. Second, the importance of the social setting of the theatrical event and thus of creating a save frame for new theatre visitors. Thirdly the article provides a critical...

  16. Perils and potentials in qualitative psychology.

    Science.gov (United States)

    Brinkmann, Svend

    2015-06-01

    Famously, Ebbinghaus declared that psychology has a long past, but only a short history. Psychology, as something implicit to human conduct, is as old as the human race, but the science, as an explicit investigative reflection upon that conduct, is a recent invention. Within the short history of psychology, we find an even shorter history of qualitative psychology specifically. Although most founding fathers (Freud, Piaget, Bartlett etc.) worked as "qualitative psychologists", they found no need to thematize their methods of inquiry in this manner. Since around 1980, however, a field has established itself that can be called qualitative psychology. In this paper, I discuss how this field can move sensibly into the future, and I highlight two perils and two potentials. The perils stem from neo-positivism and a threatening "McDonaldization" of qualitative research, while the potentials are related to proliferation of new forms of inquiry and a transcending of disciplinary boundaries.

  17. Baby Skyrme models without a potential term

    Science.gov (United States)

    Ashcroft, Jennifer; Haberichter, Mareike; Krusch, Steffen

    2015-05-01

    We develop a one-parameter family of static baby Skyrme models that do not require a potential term to admit topological solitons. This is a novel property as the standard baby Skyrme model must contain a potential term in order to have stable soliton solutions, though the Skyrme model does not require this. Our new models satisfy an energy bound that is linear in terms of the topological charge and can be saturated in an extreme limit. They also satisfy a virial theorem that is shared by the Skyrme model. We calculate the solitons of our new models numerically and observe that their form depends significantly on the choice of parameter. In one extreme, we find compactons while at the other there is a scale invariant model in which solitons can be obtained exactly as solutions to a Bogomolny equation. We provide an initial investigation into these solitons and compare them with the baby Skyrmions of other models.

  18. Potentialities of hydrogen production in Algeria

    Energy Technology Data Exchange (ETDEWEB)

    Boudries, R. [CDER, Route de l' Observatoire, Bouzareah Algiers (Algeria); USTHB, El Alia, Algiers (Algeria); Dizene, R. [USTHB, El Alia, Algiers (Algeria)

    2008-09-15

    The objective of the present study is to estimate the potentialities of hydrogen production in Algeria. Particular attention is paid to the clean and sustainable hydrogen production, i.e., production from renewable energy. First, the present overall energy situation in Algeria is reviewed. Trend in energy demand is analysed taking into account major parameters such as population growth, urbanization, improvement in quality of life and export opportunities. The resources available for hydrogen production are then presented. Finally, the estimation of hydrogen production potential using solar sources, the most important renewable energy sources in Algeria, is presented. This study indicates that the shift to hydrogen economy shows a promising prospect. Not only, it can meet the evergrowing local needs but it will also allow Algeria to keep its share of the energy market. Indeed, as is now the case for natural gas, hydrogen could be delivered to Western Europe through pipelines. (author)

  19. Potential of Starch Nanocomposites for Biomedical Applications

    Science.gov (United States)

    Zakaria, N. H.; Muhammad, N.; Abdullah, M. M. A. B.

    2017-06-01

    In recent years, the development of biodegradable materials from renewable sources based on polymeric biomaterials have grown rapidly due to increase environmental concerns and the shortage of petroleum sources. In this regard, naturally renewable polymers such as starch has shown great potential as environmental friendly materials. Besides, the unique properties of starch such as biodegradable and non-toxic, biocompatible and solubility make them useful for a various biomedical applications. Regardless of their unique properties, starch materials are known to have limitations in term of poor processability, low mechanical properties, poor long term stability and high water sensitivity. In order to overcome these limitations, the incorporation of nano size fillers into starch materials (nanocomposites) has been introduced. This review aims to give an overview about structure and characteristics of starch, modification of starch by nanocomposites and their potential for biomedical applications.

  20. The transdisciplinary potential of remediated painting

    DEFF Research Database (Denmark)

    Petersen, Anne Ring

    2011-01-01

    "The Transdisciplinary Potential of Remediated Painting" Over the last decades the notion of what painting is has been considerably widened due to intermediality, i.e. crossovers between artistic media such as painting and sculpture, painting and photography, painting and installation, painting...... and performance etc. This paper suggests that the transformation of the discipline of painting into an expanded field has not only liberated painting from its ties to its traditional repertoire of materials and modes of representation. It has also released a tremendous potential for image making that takes...... painting as a point of departure but moves beyond the limitations of dialogic intermedia into the field of transdisciplinary aesthetics. In support of my argument, I turn to the concept of remediation as it was first applied in new media theory by Jay David Bolter and Richard Grusin. The ambition...

  1. Evoked cochlear potentials in the barn owl.

    Science.gov (United States)

    Köppl, Christine; Gleich, Otto

    2007-06-01

    Gross electrical responses to tone bursts were measured in adult barn owls, using a single-ended wire electrode placed onto the round window. Cochlear microphonic (CM) and compound action potential (CAP) responses were evaluated separately. Both potentials were physiologically vulnerable. Selective abolishment of neural responses at high frequencies confirmed that the CAP was of neural origin, while the CM remained unaffected. CAP latencies decreased with increasing stimulus frequency and CAP amplitudes were correlated with known variations in afferent fibre numbers from the different papillar regions. This suggests a local origin of the CAP along the tonotopic gradient within the basilar papilla. The audiograms derived from CAP and CM threshold responses both showed a broad frequency region of optimal sensitivity, very similar to behavioural and single-unit data, but shifted upward in absolute sensitivity. CAP thresholds rose above 8 kHz, while CM responses showed unchanged sensitivity up to 10 kHz.

  2. Assessing the proarrhythmic potential of drugs

    DEFF Research Database (Denmark)

    Thomsen, Morten Bækgaard; Matz, Jørgen; Volders, Paul G A

    2006-01-01

    Torsades de pointes (TdP) is a potentially lethal cardiac arrhythmia that can occur as an unwanted adverse effect of various pharmacological therapies. Before a drug is approved for marketing, its effects on cardiac repolarisation are examined clinically and experimentally. This paper expresses...... the opinion that effects on repolarisation duration cannot directly be translated to risk of proarrhythmia. Current safety assessments of drugs only involve repolarisation assays, however the proarrhythmic profile can only be determined in the predisposed model. The availability of these proarrhythmic animal...... surrogate parameters possessing predictive power of TdP arrhythmia are reviewed. As these parameters are not developed to finalisation, any meaningful study of the proarrhythmic potential of a new drug will include evaluation in an integrated model of TdP arrhythmia....

  3. Generic Structure Potential of Christian Apologetics

    Directory of Open Access Journals (Sweden)

    Onwu Inya

    2012-01-01

    Full Text Available Religious texts have been examined by scholars from different theoretical standpoints. However, a close survey of the literature reveals that little attention has been paid to Christian apologetics from a linguistic perspective. Also, an examination of studies along the lines of Generic Structure Potential (henceforth GSP shows that the genre status of Christian apologetics has not been indicated. This gap provides the motivation for this paper, which investigates the GSP of Christian apologetics. Twenty texts written by various key contemporary apologetic writers were purposively selected for the study. The following generic structure potential catalogue was generated:The paper reveals that the elements of the GSP concertedly work to advance, argue for or defend the Christian belief system. The paper also suggests that the model could be applied to other forms of apologetic instances.

  4. Mismatch negativity (MMN: Translating the potential.

    Directory of Open Access Journals (Sweden)

    Juanita eTodd

    2013-12-01

    Full Text Available The mismatch negativity (MMN component of the auditory event-related potential has become a valuable tool in cognitive neuroscience. Its reduced size in persons with schizophrenia is of unknown origin but theories proposed include links to problems in experience-dependent plasticity reliant on N-methyl-d-aspartate glutamate receptors. In this review we address the utility of this tool in revealing the nature and time course of problems in perceptual inference in this illness together with its potential for use in translational research testing animal models of schizophrenia-related phenotypes. Specifically, we review the reasons for interest in MMN in schizophrenia, issues pertaining to the measurement of MMN, its use as a vulnerability index for the development of schizophrenia, the pharmacological sensitivity of MMN and the progress in developing animal models of MMN. Within this process we highlight the challenges posed by knowledge gaps pertaining to the tool and the pharmacology of the underlying system.

  5. Stabilizing the Higgs potential with a Z′

    Energy Technology Data Exchange (ETDEWEB)

    Di Chiara, Stefano; Keus, Venus, E-mail: venus.keus@helsinki.fi; Lebedev, Oleg

    2015-05-11

    Current data point toward metastability of the electroweak vacuum within the Standard Model. We study the possibility of stabilizing the Higgs potential in U(1) extensions thereof. A generic Z′ boson improves stability of the scalar potential in two ways: it increases the Higgs self-coupling, due to a positive contribution to the beta-function of the latter, and it decreases the top quark Yukawa coupling, which again has a stabilizing effect. We determine the range of U(1) charges which leads to a stable electroweak vacuum. In certain classes of models, such stabilization is possible even if the Z′ does not couple to the Higgs and is due entirely to the reduction of the top Yukawa coupling. We also study the effect of the kinetic mixing between the extra U(1) and hypercharge gauge fields.

  6. Vector Potential Quantization and the Quantum Vacuum

    Directory of Open Access Journals (Sweden)

    Constantin Meis

    2014-01-01

    Full Text Available We investigate the quantization of the vector potential amplitude of the electromagnetic field to a single photon state starting from the fundamental link equations between the classical electromagnetic theory and the quantum mechanical expressions. The resulting wave-particle formalism ensures a coherent transition between the classical electromagnetic wave theory and the quantum representation. A quantization constant of the photon vector potential is defined. A new quantum vacuum description results directly in having very low energy density. The calculated spontaneous emission rate and Lambs shift for the nS states of the hydrogen atom are in agreement with quantum electrodynamics. This low energy quantum vacuum state might be compatible with recent astrophysical observations.

  7. Potential Use of Ayahuasca in Grief Therapy.

    Science.gov (United States)

    González, Débora; Carvalho, María; Cantillo, Jordi; Aixalá, Marc; Farré, Magí

    2017-01-01

    The death of a loved one is ultimately a universal experience. However, conventional interventions employed for people suffering with uncomplicated grief have gathered little empirical support. The present study aimed to explore the potential effects of ayahuasca on grief. We compared 30 people who had taken ayahuasca with 30 people who had attended peer-support groups, measuring level of grief and experiential avoidance. We also examined themes in participant responses to an open-ended question regarding their experiences with ayahuasca. The ayahuasca group presented a lower level of grief in the Present Feelings Scale of Texas Revised Inventory of Grief, showing benefits in some psychological and interpersonal dimensions. Qualitative responses described experiences of emotional release, biographical memories, and experiences of contact with the deceased. Additionally, some benefits were identified regarding the ayahuasca experiences. These results provide preliminary data about the potential of ayahuasca as a therapeutic tool in treatments for grief.

  8. Computed potential energy surfaces for chemical reactions

    Science.gov (United States)

    Walch, Stephen P.; Levin, Eugene

    1993-01-01

    A new global potential energy surface (PES) is being generated for O(P-3) + H2 yields OH + H. This surface is being fit using the rotated Morse oscillator method, which was used to fit the previous POL-CI surface. The new surface is expected to be more accurate and also includes a much more complete sampling of bent geometries. A new study has been undertaken of the reaction N + O2 yields NO + O. The new studies have focused on the region of the surface near a possible minimum corresponding to the peroxy form of NOO. A large portion of the PES for this second reaction has been mapped out. Since state to state cross sections for the reaction are important in the chemistry of high temperature air, these studies will probably be extended to permit generation of a new global potential for reaction.

  9. The cultural and creative industry potential index

    Directory of Open Access Journals (Sweden)

    Antonio CASTRO-HIGUERAS

    2016-12-01

    Full Text Available The cultural and creative industries are regarded as a strategic sector in today’s knowledge economy and are therefore encouraged by government policies. The link between culture, creativity and economic development has flourished in Spain in recent years, to the extent that by 2014 the sector accounted for 3.5% of the country’s GDP and 3% of all jobs. Such an important sector requires a diagnostic tool to support decision making. A number of indicator systems have been put forward to meet this need, all of which are designed to evaluate creativity in a given field. This article examines and reviews the various indicators that have been proposed and uses them to develop a composite indicator – the Cultural and Creative Industry Potential Index – which measures the sector’s potential from three angles: the cultural base, government policies, and the cultural and creative industries themselves.

  10. Phytochemicals: Potential in Management of Climacteric Neurobiology.

    Science.gov (United States)

    Chopra, Kanwaljit; Bansal, Seema; Sachdeva, Anand Kamal

    2016-01-01

    Menopause jeopardizes the integrity of brain and makes it vulnerable to various diseases, both of psychiatric and degenerative nature. Exogenous estrogen supplementation confers neuroprotection but the results of Women's Health Initiative (WHI), Million Women Study (MWS) and incidence of endometrial cancer, breast cancer and venous thromboembolism reported with estrogen use have engendered doubts over its clinical translation for postmenopausal neurological disorders. Scientific community and general public have started recognizing the protective potential of phytochemicals in climacteric medicine. These phytochemicals are plant-derived, non-steroidal bioactive estrogenic compounds. Emerging preclinical studies have suggested that these phytochemicals display potential benefits in mitigating postmenopausal depression, anxiety, cerebral ischemia and cognitive dysfunction. Thus, the aim of present review is: a) to give an overview of neuroprotective action of estrogen, b) to address the chemical and pharmacological features of various classes of phytoestrogens, and c) to present preclinical and clinical evidence of effect of phytoestrogens on climacteric neurobiology with their possible mechanisms of action.

  11. Modeling auditory evoked potentials to complex stimuli

    DEFF Research Database (Denmark)

    Rønne, Filip Munch

    cochlear compression would be of great benefit, as a more precise diagnose of the deficits underlying a potential hearing impairment in both infants and adults could be obtained. It was demonstrated in this thesis, via experimental recordings and supported by model simulations, that the growth of the ASSR....... Sensorineural hearing impairments is commonly associated with a loss of outer hair-cell functionality, and a measurable consequence is the decreased amount of cochlear compression at frequencies corresponding to the damaged locations in the cochlea. In clinical diagnostics, a fast and objective measure of local...... clinically and in research towards using realistic and complex stimuli, such as speech, to electrophysiologically assess the human hearing. However, to interpret the AEP generation to complex sounds, the potential patterns in response to simple stimuli needs to be understood. Therefore, the model was used...

  12. Exploiting the potential of gas fermentation

    DEFF Research Database (Denmark)

    Redl, Stephanie Maria Anna; Diender, Martijn; Jensen, Torbjørn Ølshøj

    2017-01-01

    The use of gas fermentation for production of chemicals and fuels with lower environmental impact is a technology that is gaining increasing attention. Over 38 Gt of CO2 is annually being emitted from industrial processes, thereby contributing significantly to the concentration of greenhouse gases...... in the atmosphere. Together with the gasification of biomass and different waste streams, these gases have the potential for being utilized for production of chemicals through fermentation processes. Acetogens are among the most studied organisms capable of utilizing waste gases. Although engineering...... focus on the advantages of alternative fermentation scenarios, including thermophilic production strains, multi-stage fermentations, mixed cultures, as well as mixotrophy. Such processes have the potential to significantly broaden the product portfolio, increase the product concentrations and yields...

  13. Mean-Potential Law in Evolutionary Games

    Science.gov (United States)

    Nałecz-Jawecki, Paweł; Miekisz, Jacek

    2018-01-01

    The Letter presents a novel way to connect random walks, stochastic differential equations, and evolutionary game theory. We introduce a new concept of a potential function for discrete-space stochastic systems. It is based on a correspondence between one-dimensional stochastic differential equations and random walks, which may be exact not only in the continuous limit but also in finite-state spaces. Our method is useful for computation of fixation probabilities in discrete stochastic dynamical systems with two absorbing states. We apply it to evolutionary games, formulating two simple and intuitive criteria for evolutionary stability of pure Nash equilibria in finite populations. In particular, we show that the 1 /3 law of evolutionary games, introduced by Nowak et al. [Nature, 2004], follows from a more general mean-potential law.

  14. Stabilizing the Higgs potential with a Z′

    Directory of Open Access Journals (Sweden)

    Stefano Di Chiara

    2015-05-01

    Full Text Available Current data point toward metastability of the electroweak vacuum within the Standard Model. We study the possibility of stabilizing the Higgs potential in U(1 extensions thereof. A generic Z′ boson improves stability of the scalar potential in two ways: it increases the Higgs self-coupling, due to a positive contribution to the beta-function of the latter, and it decreases the top quark Yukawa coupling, which again has a stabilizing effect. We determine the range of U(1 charges which leads to a stable electroweak vacuum. In certain classes of models, such stabilization is possible even if the Z′ does not couple to the Higgs and is due entirely to the reduction of the top Yukawa coupling. We also study the effect of the kinetic mixing between the extra U(1 and hypercharge gauge fields.

  15. Probing quintessence potential with future cosmological surveys

    Science.gov (United States)

    Takeuchi, Yoshitaka; Ichiki, Kiyotomo; Takahashi, Tomo; Yamaguchi, Masahide

    2014-03-01

    Quintessence, a scalar field model, has been proposed to account for the acceleration of the Universe at present. We discuss how accurately quintessence models are discriminated by future cosmological surveys, which include experiments of CMB, galaxy clustering, weak lensing, and the type Ia SNe surveys, by making use of the conventional parameterized dark energy models. We can see clear differences between the thawing and the freezing quintessence models at more than 1σ (2σ) confidence level as long as the present equation of state for quintessence is away from -1 as wXgtrsim-0.95(-0.90). However, it is found to be difficult to probe the effective mass squared for the potential in thawing models, whose signs are different between the quadratic and the cosine-type potentials. This fact may require us to invent a new estimator to distinguish quintessence models beyond the thawing and the freezing ones.

  16. Quantum potential physics, geometry and algebra

    CERN Document Server

    Licata, Ignazio

    2014-01-01

    Recently the interest in Bohm realist interpretation of quantum mechanics has grown. The important advantage of this approach lies in the possibility to introduce non-locality ab initio, and not as an “unexpected host”. In this book the authors give a detailed analysis of quantum potential, the non-locality term and its role in quantum cosmology and information. The different approaches to the quantum potential are analysed, starting from the original attempt to introduce a realism of particles trajectories (influenced by de Broglie’s pilot wave) to the recent dynamic interpretation provided by Goldstein, Durr, Tumulka and Zanghì, and the geometrodynamic picture, with suggestion about quantum gravity. Finally we focus on the algebraic reading of Hiley and Birkbeck school, that analyse the meaning of the non-local structure of the world, bringing important consequences for the space, time and information concepts.

  17. THE POTENTIAL OF WATER IN MAMMALIAN TISSUES

    Science.gov (United States)

    Maffly, Roy H.; Leaf, Alexander

    1959-01-01

    Melting point depression was used as an index of the water potential of rat tissues and serum. Organs removed from anesthetized rats were immediately frozen in liquid nitrogen and ground with mortar and pestle. Aliquots of the resulting frozen powder were suspended in chilled liquid silicone. While the suspension was vigorously stirred and warmed at a constant rate, the temperature of the melting mixture was measured. The melting curves of rat muscle, liver, heart, and brain were not significantly different from those of rat serum. The melting curve depression of whole kidney was greater than that of serum; this was demonstrated to be due to hypertonicity of the renal medullary area alone. It was demonstrated that autolysis will rapidly increase the depression of the melting curve of tissue. It is concluded that within the limits of the method used the melting point depression, and hence the water potential, of intracellular and extracellular fluids is the same. PMID:13664925

  18. Potential biomedical applications of marine algae.

    Science.gov (United States)

    Wang, Hui-Min David; Li, Xiao-Chun; Lee, Duu-Jong; Chang, Jo-Shu

    2017-11-01

    Functional components extracted from algal biomass are widely used as dietary and health supplements with a variety of applications in food science and technology. In contrast, the applications of algae in dermal-related products have received much less attention, despite that algae also possess high potential for the uses in anti-infection, anti-aging, skin-whitening, and skin tumor treatments. This review, therefore, focuses on integrating studies on algae pertinent to human skin care, health and therapy. The active compounds in algae related to human skin treatments are mentioned and the possible mechanisms involved are described. The main purpose of this review is to identify serviceable algae functions in skin treatments to facilitate practical applications in this high-potential area. Copyright © 2017 Elsevier Ltd. All rights reserved.

  19. Development potential for hydropower; Ausbaupotential der Wasserkraft

    Energy Technology Data Exchange (ETDEWEB)

    Laufer, F.; Groetzinger, S.; Peter, M.; Schmutz, A.

    2004-11-15

    This comprehensive report for the Swiss Federal Office of Energy (SFOE) takes a look at the potential for the development of hydropower in Switzerland. The report updates the energy perspectives made ten years earlier. An overview of Swiss electricity production and consumption is presented and the proportion provided by hydropower is noted. Figures on installed capacity and import/export quantities are presented and discussed. Technological developments and the economical frameworks involved are discussed, as are regulatory measures that can be taken. Theoretical and technically realisable potentials for increased use of hydropower are discussed. The methods used to do this are examined. Strategies and measures to be taken are listed and discussed. An appendix includes data sheets on power plant modelling, including examples

  20. Candida in potentially malignant oral disorders

    Directory of Open Access Journals (Sweden)

    S Leena Sankari

    2015-01-01

    Full Text Available Oro-pharyngeal cancer is a significant component in the global burden of cancer. A considerable proportion of oral squamous carcinomas develop from preexsiting potentially malignant disorder of the oral cavity. The term potentially malignant oral disorders (PMD were proposed for the precancerous lesions and conditions by World Health Organization in 2007. PMD are considered an in-between clinical state, which showed increased risk for cancer development. Etiology of PMD is multifactorial. Tobacco and alcohol are the major risk factors. In recent years, role of candidal infection is recognized as a significant factor in the development of PMD. There is an enduring discussion whether Candida infection can be a cause of PMD or a superimposed infection in a preexisting lesion. This article highlights the association between Candida and PMD.

  1. EVALUATION OF SHALE GAS POTENTIAL IN KAZAKHSTAN

    Directory of Open Access Journals (Sweden)

    Lidiya Parkhomchik

    2015-01-01

    Full Text Available The article considers the primary evaluation of the shale gas resource potential in Kazakhstan, as well as defines the most problematic issues for the large-scale shale gas production over the state. The authors pay special attention to the national strategy of the Kazakhstani government in the sphere of the unconventional energy sources production, defining the possible technological and environmental problems for the shale gas extraction. The article also notes that implementation of the fracking technologies in the country could cause both positive and negative effects on the economy of Kazakhstan. Therefore, further steps in this direction should be based on the meaningful and comprehensive geological data regarding the shale gas potential.

  2. Diabetes and gastric cancer: The potential links

    OpenAIRE

    Tseng, Chin-Hsiao; Tseng, Farn-Hsuan

    2014-01-01

    This article reviews the epidemiological evidence linking diabetes and gastric cancer and discusses some of the potential mechanisms, confounders and biases in the evaluation of such an association. Findings from four meta-analyses published from 2011 to 2013 suggest a positive link, which may be more remarkable in females and in the Asian populations. Putative mechanisms may involve shared risk factors, hyperglycemia, Helicobacter pylori (H. pylori) infection, high salt intake, medications a...

  3. Potential energy landscapes of tetragonal pyramid molecules

    Science.gov (United States)

    Yoshida, Yuichiro; Sato, Hirofumi; Morgan, John W. R.; Wales, David J.

    2016-11-01

    Hiraoka et al. have developed a self-assembling system referred to as a nanocube (Hiraoka et al., 2008). In the present contribution a coarse-grained model for this system is analysed, focusing on how the potential energy landscape for self-assembly is related to the geometry of the building blocks. We find that six molecules assemble to form various clusters, with cubic and sheet structures the most stable. The relative stability is determined by the geometry of the building blocks.

  4. Global evaluation of biofuel potential from microalgae.

    Science.gov (United States)

    Moody, Jeffrey W; McGinty, Christopher M; Quinn, Jason C

    2014-06-10

    In the current literature, the life cycle, technoeconomic, and resource assessments of microalgae-based biofuel production systems have relied on growth models extrapolated from laboratory-scale data, leading to a large uncertainty in results. This type of simplistic growth modeling overestimates productivity potential and fails to incorporate biological effects, geographical location, or cultivation architecture. This study uses a large-scale, validated, outdoor photobioreactor microalgae growth model based on 21 reactor- and species-specific inputs to model the growth of Nannochloropsis. This model accurately accounts for biological effects such as nutrient uptake, respiration, and temperature and uses hourly historical meteorological data to determine the current global productivity potential. Global maps of the current near-term microalgae lipid and biomass productivity were generated based on the results of annual simulations at 4,388 global locations. Maximum annual average lipid yields between 24 and 27 m(3)·ha(-1)·y(-1), corresponding to biomass yields of 13 to 15 g·m(-2)·d(-1), are possible in Australia, Brazil, Colombia, Egypt, Ethiopia, India, Kenya, and Saudi Arabia. The microalgae lipid productivity results of this study were integrated with geography-specific fuel consumption and land availability data to perform a scalability assessment. Results highlight the promising potential of microalgae-based biofuels compared with traditional terrestrial feedstocks. When water, nutrients, and CO2 are not limiting, many regions can potentially meet significant fractions of their transportation fuel requirements through microalgae production, without land resource restriction. Discussion focuses on sensitivity of monthly variability in lipid production compared with annual average yields, effects of temperature on productivity, and a comparison of results with previous published modeling assumptions.

  5. The Feminist Potential of Sociological Institutionalism

    OpenAIRE

    Mackay, Fiona; Waylen, Georgina; Monro, Surya

    2009-01-01

    On the face of it, there is considerable potential for productive dialogue between sociological institutionalism (SI) and institutionally oriented feminist political science (FPS). Both approaches employ broad conceptions of the political and its interconnection with the social: Each is concerned with the interaction between actors and institutions, broadly defined; the interplay between formal rules and informal practices, norms, and “ways of doing things”; and the consequent effects of thes...

  6. POTENTIAL OF ASSET SECURITISATION IN SINGAPORE

    OpenAIRE

    Chong, Joanne Lee Men

    2008-01-01

    This dissertation aims to study the potential of Asset Securitisation in Singapore. Three main securitisation vehicles have been used by Singapore�s property companies to divest real estate assets, namely, mortgage-backed bond (MBB), asset-backed securitisation (ABS) and real estate investment trust (REIT). The focus of this paper is on real estate securitisation (RES) taking into consideration of commercial mortgage-backed securitisation (CMBS), residential mortgage-backed securitisati...

  7. Business Potential of Halloween: Sales and Trends

    OpenAIRE

    Wadim Strielkowski

    2014-01-01

    The paper assesses the business potential of Halloween by estimating the profits stemming from the sales of Halloween-related goods and activities. It also estimates two empirical models of Halloween spending with macroeconomic variables, using the sales data for the most traditional Halloween paraphernalia, the Halloween pumpkins, as well as for the three groups of products (candies, costumes and decorations), and finds that the share of more “consumer-oriented” products increases in relatio...

  8. Potential demand for alternative fuel vehicles

    OpenAIRE

    Dagsvik, John K.; Dag G. Wetterwald; Aaberge, Rolf

    1996-01-01

    the paper was later published as an article in: Transportation Research Part B: Methodological, Volume 36, Number 4, May 2002 , pp. 361-384 This paper analyzes the potential household demand for alternative fuel vehicles in Norway, by applying data from a stated preference survey. The alternative fuel vehicles we consider are liquid propane gas and electric powered vehicles in addition to a dual-fuel vehicle. In this survey each respondent, in a randomly selected sample, was exposed to 15 ...

  9. Potential demand for alternative fuel vehicles

    OpenAIRE

    Dagsvik, John K.; Dag G. Wetterwald; Aaberge, Rolf

    1996-01-01

    This paper analyzes the potential household demand for alternative fuel vehicles in Norway, by applying data from a stated preference survey. The alternative fuel vehicles we consider are liquid propane gas and electric powered vehicles in addition to a dual-fuel vehicle. In this survey each respondent, in a randomly selected sample, was exposed to 15 experiments. In each experiment the respondent is asked to rank three hypothetical vehicles characterized by specified attributes, according to...

  10. Energy Savings Potential of Radiative Cooling Technologies

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, Nicholas [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Wang, Weimin [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Alvine, Kyle J. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Katipamula, Srinivas [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2015-11-30

    Pacific Northwest National Laboratory (PNNL), with funding from the U.S. Department of Energy’s (DOE’s) Building Technologies Program (BTP), conducted a study to estimate, through simulation, the potential cooling energy savings that could be achieved through novel approaches to capturing free radiative cooling in buildings, particularly photonic ‘selective emittance’ materials. This report documents the results of that study.

  11. Anti-ulcer potential of Oxystelma esculentum

    OpenAIRE

    Devang J Pandya; Indermeet Singh Anand

    2011-01-01

    Oxystelma esculentum is a perennial twiner growing near water-logged areas in the Indian subcontinent. It is used traditionally in stomach ulcers. The present work deals with the investigation of anti-ulcer potential of O. esculentum. The plant was successively extracted with solvents of varying polarities, which served as the test extracts. Anti-ulcer effect was checked in Wistar rats using aspirin- and ethanol-induced acute ulcer models. The petroleum ether extract was found to possess the ...

  12. Stability analysis in tachyonic potential chameleon cosmology

    Energy Technology Data Exchange (ETDEWEB)

    Farajollahi, H.; Salehi, A.; Tayebi, F.; Ravanpak, A., E-mail: hosseinf@guilan.ac.ir, E-mail: a.salehi@guilan.ac.ir, E-mail: ftayebi@guilan.ac.ir, E-mail: aravanpak@guilan.ac.ir [Department of Physics, University of Guilan, Rasht (Iran, Islamic Republic of)

    2011-05-01

    We study general properties of attractors for tachyonic potential chameleon scalar-field model which possess cosmological scaling solutions. An analytic formulation is given to obtain fixed points with a discussion on their stability. The model predicts a dynamical equation of state parameter with phantom crossing behavior for an accelerating universe. We constrain the parameters of the model by best fitting with the recent data-sets from supernovae and simulated data points for redshift drift experiment generated by Monte Carlo simulations.

  13. Hydrocarbon generative potential of cretaceous sediments of ...

    African Journals Online (AJOL)

    The Hydrogen Index (HI) values (19 – 85 mgHC/gTOC) and cross plots of Hydrogen Index (HI) versus Oxygen Index (OI), classified the sediments as types 111 and IV organic matter which had potential o to generate mainly gas. The T and Production Index (PI) values ranged from 339 – 436ºC and 0.08 – 0.32 max while the ...

  14. [Online gaming. Potential risk and prevention programs].

    Science.gov (United States)

    Malischnig, Doris

    2014-12-01

    Online gaming is more and more common and increasingly accessible. Due to a lack of social control the participation could be a potential risk for certain customers. The given article focuses on prevention measures that are provided by the Austrian online gaming operator, the Austrian Lotteries, provider of the online gaming platform win2day, in the light of the specifics of Internet gaming in order to avoid problems with gaming.

  15. The osteogenic potential of human bone callus

    OpenAIRE

    Weiqi Han; Wei He; Wanlei Yang; Jianlei Li; Zhifan Yang; Xuanyuan Lu; An Qin; Yu Qian

    2016-01-01

    Bone callus, generated during fracture healing, is commonly discarded during surgical procedures. The aim of this study was to investigate the osteogenic potential of bone callus and its possible use as autograft material for patients needing bone grafts. Histology, immunohistochemistry, micro-computed tomography, and biomechanics were performed to examine osteogenic cells, osteoinductive factors, and the osteoconductive structure of bone callus. Alkaline phosphatase-positive osteoblasts, ost...

  16. Relating membrane potential to impedance spectroscopy

    Directory of Open Access Journals (Sweden)

    Eugen Gheorghiu

    2011-12-01

    Full Text Available Non-invasive, label-free assessment of membrane potential of living cells is still a challenging task. The theory linking membrane potential to the low frequency α dispersion exhibited by suspensions of spherical shelled particles (presenting a net charge distribution on the inner side of the shell has been pioneered in our previous studies with emphasis on the permittivity spectra. Whereas α dispersion is related to a rather large variation exhibited by the permittivity spectrum, we report that the related decrement presented by the impedance magnitude spectrum is either extremely small, or occurs (for large cells at very small frequencies (~mHz explaining the lack of experimental bioimpedance data on the matter. We stress that appropriate choice of the parameters (as revealed by the microscopic model may enable access to membrane potential as well as to other relevant parameters when investigating living cells and charged lipid vesicles. We analyse the effect on the low frequency of the permittivity and impedance spectra of: I. Parameters pertaining to cell membrane i.e. (i membrane potential (through the amount of the net charge on the inner side of the membrane, (ii size of the cells/vesicles, (iii conductivity of the membrane; II. Parameters of the extra cellular medium (viscosity and conductivity. The applicability of the study has far reaching implications for basic (life sciences (providing non-invasive access to the dynamics of relevant cell parameters as well as for biosensing applications, e.g. assessment of cytotoxicity of a wide range of stimuli. doi:10.5617/jeb.214 J Electr Bioimp, vol. 2, pp. 93-97, 2011

  17. Dendroclimatological potential of the Australian red cedar

    OpenAIRE

    Heinrich, Ingo; Banks, J. C. G.

    2005-01-01

    We examined Toona ciliata M.Roemer (Australian red cedar) for its potential to deliver annually resolved tree-ring proxy data. Such proxies are valuable and sought-after sources for reconstructing climate beyond instrumental records, especially in Australia. T. ciliata was chosen because it is one of the few deciduous tree species in Australia experiencing a seasonally dormant period of the cambium. This was confirmed by a preliminary tree-ring analysis which revealed distinct growth rings. B...

  18. Opioid Peptides: Potential for Drug Development

    OpenAIRE

    Aldrich, Jane V.; McLaughlin, Jay P.

    2012-01-01

    Opioid receptors are important targets for the treatment of pain and potentially for other disease states (e.g. mood disorders and drug abuse) as well. Significant recent advances have been made in identifying opioid peptide analogs that exhibit promising in vivo activity for treatment of these maladies. This review focuses on the development and evaluation of opioid peptide analogs demonstrating activity after systemic administration, and recent clinical evaluations of opioid peptides for po...

  19. Hydropower in Turkey: potential and market assessment

    Energy Technology Data Exchange (ETDEWEB)

    2010-10-15

    The Turkish hydropower market provides huge opportunities for investors and suppliers. Successful market entry is not easy, however, as the market is still not fully liberalized, the need for local intelligence is large and the competition is increasing. There are also potential political, reputational and environmental risks, typical for an emerging economy. The World Bank global 'Ease of doing business' ranking (2010), ranks Turkey as number 73 of 183 countries. (Author)

  20. Entropy, geometry, and the quantum potential

    OpenAIRE

    Carroll, Robert

    2005-01-01

    We sketch and emphasize the automatic emergence of a quantum potential Q in e.g. classical WDW type equations upon inserting a (Bohmian) complex wave function. The interpretation of Q in terms of momentum fluctuations via Fisher information and entropy ideas is discussed along with the essentially forced role of the amplitude squared as a probability density. We also review the constructions of Padmanabhan connecting entropy and the Einstein equations.