cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Le marché de bestiaux du gouvernorat de Sidi Bouzid: un levier de développement rural du Centre tunisien
Creators: name: Selmi, Salah
name: Elloumi, Mohamed
name: Allagui, Leila
name: Chouaibi, Walid
name: Selmi, Salah
name: Elloumi, Mohamed
name: Allagui, Leila
name: Chouaibi, Walid
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Environmental Economics and Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Resource /Energy Economics and Policy

description: L’élevage ovin est une activité traditionnelle dans toutes les régions de la Tunisie et surtout le Centre et le Sud. Sur le plan national et jusqu'à une date récente seule la viande bovine retenait l'attention des pouvoirs publics et les opérateurs privés. Face aux enjeux actuels de satisfaction des besoins du pays en viandes rouges et la mise à niveau de la filière des ovins, on assiste à un processus de développement du secteur qui connaît une restructuration du cheptel et une intensification de la production en intégrant les cultures fourragères ainsi qu’une mise à niveau des marchés de bestiaux. Dans le gouvernorat de Sidi Bouzid où l’élevage ovin occupe une place de choix dans l’économie régionale, les systèmes de production agricole connaîssent une mutation profonde. Le développement du secteur irrigué et la diversification des systèmes de cultures et d'élevage expliquent la croissance de l’agriculture et le développement de la région. Cette mutation a touché aussi la structure du marché et les circuits de commercialisation des animaux. La commercialisation des viandes rouges est étroitement liée à l’élevage de bétail qui reste encore très dépendant des conditions climatiques et des politiques suivies. Dans la région de Sidi Bouzid, on dénombre des circuits différenciés de distribution des animaux et la concurrence est relativement forte. La performance du marché est caractérisée par la faiblesse des marges bénéficiaires dégagées par les éleveurs et les bouchers en comparaison avec les intermédiaires. Ce travail cherche à analyser la structure, les comportements des acteurs et la performance du marché de bestiaux de Sidi Bouzid –l’un des plus grands et connus des marchés du pays- et son rôle dans la dynamique de la filière ovine et dans le développement régional.
Second gradient electrodynamics: Green functions, wave propagation, regularization and self-force
Creators: name: Lazar, Markus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this work, the theory of second gradient electrodynamics, which is an important example of generalized electrodynamics, is proposed and investigated. Second gradient electrodynamics is a gradient field theory with up to second-order derivatives of the electromagnetic field strengths in the Lagrangian density. Second gradient electrodynamics possesses a weak nonlocality in space and time. In the framework of second gradient electrodynamics, the retarded Green functions, first-order derivatives of the retarded Green functions, retarded potentials, retarded electromagnetic field strengths, generalized Lienard-Wiechert potentials and the corresponding electromagnetic field strengths are derived for three, two and one spatial dimensions. The behaviour of the electromagnetic fields is investigated on the light cone. In particular, the retarded Green functions and their first-order derivatives show oscillations around the classical solutions inside the forward light cone and it is shown that they are singularity-free and regular on the light cone in three, two and one spatial dimensions. In second gradient electrodynamics, the self-force and the energy release rate are calculated and the equation of motion of a charged point particle, which is an integro-differential equation where the infamous third-order time-derivative of the position does not appear, is determined.
description: 27 pages, 7 figures. arXiv admin note: substantial text overlap with arXiv:2005.02874
title: Работа с одаренными детьми
Creators: name: ELS IPR BOOKS
Publisher: name: Северо-Осетинский государственный педагогический институт
Year: 2020

description: В учебно-методическом пособии рассматриваются вопросы, связанные с обучением и развитием одаренных детей в структуре школьного и дополнительного образования. Материалы, представленные в пособии, направлены на формирование у студентов системы представлений о психолого-педагогических основах работы с одаренными детьми различных возрастных групп. Предлагаемое учебно-методическое пособие предназначено для бакалавров направления подготовки 44.03.01 Педагогическое образование, 44.03.05 Педагогическое образование (с двумя профилями подготовки).
Has Imported Rice Crowded-out Domestic Rice Production in Ghana? What has Been the Role of Policy?
Creators: name: Asuming-Brempong, Samuel
name: Osei-Asare, Yaw Bonsu
name: Asuming-Brempong, Samuel
name: Osei-Asare, Yaw Bonsu
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Production Economics
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Resource /Energy Economics and Policy
subject: Ghana
subject: market integration Policy
subject: Rice
subject: Production

description: Commercial rice imports have accounted for approximately 61%, food aid in rice accounted for about 2%, and domestic rice accounted for some 37% per annum of rice consumption in Ghana over the four years between 2000 and 2003. Compared to the 1990s, these figures show a gradual decline in the share of local rice production in the total quantities of rice consumed in the country. On the other hand, the proportion of food aid in rice consumed has remained relatively constant over the period, while the proportion of commercial imports has increased steadily. Using the Engel-Granger residual-based co-integration test, a market integration analysis was explored for imported rice and domestic rice which compared a central market for imported rice and five key rice producing centres in Ghana. In addition, the various policies that affected rice during the period were analysed. The results of the co-integration analysis suggest that there is no spatial market integration between the central market price of imported rice and prices in the local markets. This implies that the prices of imported rice in these local markets do not share common properties or behaviour with prevailing price trends in the central market, suggesting that markets for imported rice in Ghana are segmented, and domestic policies have generally not favoured local rice production
Biofuels, Poverty, and Growth: A Computable General Equilibrium Analysis of Mozambique
Creators: name: Arndt, Channing
name: Benfica, Rui M.S.
name: Tarp, Finn
name: Thurlow, James
name: Uaiene, Rafael N.
name: Arndt, Channing
name: Benfica, Rui M.S.
name: Tarp, Finn
name: Thurlow, James
name: Uaiene, Rafael N.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: International Development
subject: Resource /Energy Economics and Policy
subject: bio-fuels
subject: growth
subject: poverty
subject: Mozambique
subject: Africa

description: This paper assesses the implications of large-scale investments in biofuels for growth and income distribution. We find that biofuels investment enhances growth and poverty reduction despite some displacement of food crops by biofuels. Overall, the biofuel investment trajectory analyzed increases Mozambique’s annual economic growth by 0.6 percentage points and reduces the incidence of poverty by about six percentage points over a 12-year phase-in period. Benefits depend on production technology. An outgrower approach to producing biofuels is more pro-poor, due to the greater use of unskilled labor and accrual of land rents to smallholders, compared with the more capital-intensive plantation approach. Moreover, the benefits of outgrower schemes are enhanced if they result in technology spillovers to other crops. These results should not be taken as a green light for unrestrained biofuels development. Rather, they indicate that a carefully designed and managed biofuels policy holds the potential for substantial gains.
Alternative to Disincentive Rice Producer Prices in Madagascar: Case Study in Alaotra Prefecture and Bongolava Prefecture
Creators: name: Ralandison, Tsilavo
name: Shiratake, Yoshiharu
name: Ralandison, Tsilavo
name: Shiratake, Yoshiharu
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Environmental Economics and Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Cooperatives
subject: Madagascar
subject: Markets
subject: Rice

description: This study identifies the reasons for low producer prices of rice that have not covered its production costs for many years in Madagascar. The following points will be discussed: the farmers’ marketing conditions and the rural rice market structure, including the functions of each intervening trader preceding rice distribution in urban centers. The study also assesses current functions of the agricultural farmer cooperative: an organization expected to enable the establishment of fair trade in the domestic rice market. The data come from interviews conducted with 120 farmers, 20 traders, and the survey of the overall cooperative associations in two prefectures and main rice suppliers of the capital city. The analysis reveals that farmers were often compelled to sell their products largely to the nearby village assemblers who are under the commission of large traders located in urban cities. Despite the fact that farmers do not maintain bargaining power for a variety of reasons, there have been no rural organizations, such as agricultural farmer cooperatives, established to support them in many areas. The few agricultural farmer cooperatives that have been introduced recently maintain only limited market power because they are ill-suited to deal with the farmers’ conditions. The results suggest that the major issues which may deserve more attention are: the emergence and furtherance of a cooperative movement which fits the local conditions, the enforcement of market rules, and the establishment of marketing institutions that ensure fair trade.
Density fluctuations of a hard-core Bose gas in a one-dimensional lattice
Creators: name: Ates, C.
name: Moseley, Ch.
name: Ziegler, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For a hard-core Bose gas on a one-dimensional lattice we find characteristic oscillations in the density-density correlation function. Their wavelength diverges as the system undergoes a continuous transition from an incommensurate to a Mott insulating phase. The associated static structure factor vanishes as the Mott insulating phase is approached. The qualitative picture is unchanged when a weak confinig potential is applied to the system.
description: 4 pages, 4 figures, submitted to Phys. Rev. Lett
Persistence and the Random Bond Ising Model in Two Dimensions
Creators: name: Jain, S.
name: Flynn, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the zero-temperature persistence phenomenon in the random bond $\pm J$ Ising model on a square lattice via extensive numerical simulations. We find strong evidence for ` blocking\rq regardless of the amount disorder present in the system. The fraction of spins which {\it never} flips displays interesting non-monotonic, double-humped behaviour as the concentration of ferromagnetic bonds $p$ is varied from zero to one. The peak is identified with the onset of the zero-temperature spin glass transition in the model. The residual persistence is found to decay algebraically and the persistence exponent $θ(p)\approx 0.9$ over the range $0.1\le p\le 0.9$. Our results are completely consistent with the result of Gandolfi, Newman and Stein for infinite systems that this model has ` mixed\rq behaviour, namely positive fractions of spins that flip finitely and infinitely often, respectively. [Gandolfi, Newman and Stein, Commun. Math. Phys. {\bf 214} 373, (2000).]
description: 9 pages, 5 figures
title: 2014 Faculty Conference: the emerging problem of compliance on campus
Creators: name: Boyd, Thomas M.
name: Flintoft, Rebecca
Publisher: name: Mountain Scholar
Year: 2007
Subjects: Campus Save Act
DoD
faculty conference
compliance
CDC
export control
Title IX

description: This presentation gives an overview of the emerging problem of compliance for higher education, including: the number of statues and regulations associated with areas of higher education; examples of compliance requirements for the Department of Defense Tuition Assistance Program, the Center for Disease Control contract awards, and overall government export controls; and the various policies and acts governing awareness, prevention and reporting of sexual violence on campus. Campus compliance and policy resources for faculty are also highlighted.
title: Методика обучения математике в начальной школе
Creators: name: ELS IPR BOOKS
Publisher: name: Северо-Осетинский государственный педагогический институт
Year: 2018

description: В пособии подробно раскрываются вопросы общей методики обучения математике в начальной школе. Вопросы и задания для самопроверки позволят студентам проверить полученные знания по каждой теме. Пособие будет полезно также учителям, работающим в начальной школе. Учебное пособие может быть рекомендовано обучающимся по направлениям подготовки: 44.03.01 Педагогическое образование (профиль «Начальное образование»); 44.03.05 Педагогическое образование (профиль «Начальное образование / Русский язык», профиль «Начальное образование / Родной язык и литература», профиль «Начальное образование / Дошкольное образование»).
Casimir forces in modulated systems
Creators: name: Dzyaloshinskii, I. E.
name: Kats, E. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For the first time we present analytical results for the contribution of electromagnetic fluctuations into thermodynamic properties of modulated systems, like cholesteric or smectic liquid crystalline films. In the case of small dielectric anisotropy we have derived explicit analytical expressions for the chemical potential of such systems. Two limiting cases were specifically considered: (i) the Van der Waals (VdW) limit, i.e., in the case when the retardation of the electromagnetic interactions can be neglected; and (ii) the Casimir limit, i.e. when the effects of retardation becomes considerable. It was shown that in the Casimir limit, the film chemical potential oscillates with the thickness of the film. This non-monotonic dependence of the chemical potential on the film thickness can lead to step-wise wetting phenomena, surface anchoring reorientation and other important effects. Applications of the results may concern the various systems in soft matter or condensed matter physics with multilayer or modulated structures.
description: 13 pages
Durabilité des systèmes de production des petits ruminants: Une approche de santé animale–marketing
Creators: name: Zaibet, Lokman
name: Abdelhafidh, Hassen
name: Zaibet, Lokman
name: Abdelhafidh, Hassen
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Demand and Price Analysis
subject: Environmental Economics and Policy
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods

description: L’objectif de ce papier est d’identifier les contraintes de commercialisation des petits ruminants sur le marché aux bestiaux. Ces contraintes sont particulièrement prononcées chez les petits éleveurs. Notre recherche met en évidence la relation entre les caractéristiques de cette catégorie d’éleveurs et le choix du lieu de commercialisation (marché, sur la route ou à la ferme). Ce choix est lié aussi aux coûts de transaction qui se manifestent sur le marché mais aussi à l’état de santé du cheptel. La décision de ne pas se rendre sur le marché est supposée influencer négativement la continuité de cette activité et par conséquent la durabilité de d’élevage chez les petits éleveurs. Parmi les facteurs trouvés favoriser la chance de se rendre sur le marché il y a la possession de moyen de transport et la fréquence de visites vétérinaires. La santé animale est déterminante aussi bien pour la productivité (problème d’avortement, par exemple) que la commercialisation.
Additional file 1 of A descriptive study of acute outbreaks of respiratory disease in Norwegian fattening pig herds
Creators: name: Cohen, Liza Miriam
name: Grøntvedt, Carl Andreas
name: Klem, Thea B.
name: Gulliksen, Stine Margrethe
name: Ranheim, Birgit
name: Nielsen, Jens Peter
name: Valheim, Mette
name: Kielland, Camilla
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: Additional file 1. Protocol for postmortem sampling. A scheme for a standardized postmortem evaluation and sampling of pigs’ lungs. The scheme was compiled at the pathology department at The Norwegian Veterinary Institute to be used in the study of acute respiratory disease outbreaks.
title: Методика развития читательской самостоятельности младших школьников через технологии литературного образования
Creators: name: ELS IPR BOOKS
Publisher: name: Северо-Осетинский государственный педагогический институт
Year: 2018

description: Автором монографии рассматривается проблема формирования способности применять технологии литературного образования бакалаврами в развитии читательской самостоятельности младших школьников, разработан критериально-оценочный комплекс для выявления уровней сформированности данной способности. Полученные практические результаты могут быть использованы при моделировании процесса профессиональной подготовки бакалавров начального образования преподавателями педагогических вузов профиля «Начальное образование»; при организации воспитания интереса к чтению книг у детей в процессе обучения.
Determinants of adoption and intensity of use of balanced nutrient management systems technologies in the northern Guinea savanna of Nigeria
Creators: name: Akinola, Adebayo A.
name: Arega, D.A.
name: Adeyemo, Remi
name: Sanogo, Diakalia
name: Olanrewaju, Adetunji S.
name: Nwoke, C.
name: Nzigaheba, G.
name: Diels, J.
name: Akinola, Adebayo A.
name: Arega, D.A.
name: Adeyemo, Remi
name: Sanogo, Diakalia
name: Olanrewaju, Adetunji S.
name: Nwoke, C.
name: Nzigaheba, G.
name: Diels, J.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Environmental Economics and Policy
subject: Farm Management
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Health Economics and Policy
subject: Institutional and Behavioral Economics
subject: International Relations/Trade
subject: Livestock Production/Industries
subject: Productivity Analysis
subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Adoption
subject: BNMS-manure
subject: BNMS-rotation
subject: Northern Guinea Savanna (NGS).

description: As part of a major effort to address soil fertility decline in West Africa, a project on Balanced Nutrient Management Systems (BNMS) has since 2000 been implemented in the northern Guinea savanna (NGS) of Nigeria. The project has tested and promoted two major technology packages, including a combined application of inorganic fertilizer and manure (BNMS-manure) and a soybean/maize rotation practice referred to as BNMS-rotation. This study employed Tobit model to examine factors that influence the adoption and intensity of utilization of BNMS technologies in the NGS of Nigeria. Results showed that less than 10% of the sample households adopted at least one of the two components of the technology package by the end of 2002. However, by 2005 the adoption of BNMS-rotation had reached 40% while that of BNMS-manure had reached 48%. A number of factors such as access to credit, farmers’ perception of the state of land degradation, and assets ownership were found to be significant in determining farmers’ adoption decisions on BNMS-manure while off-farm income was found to be significant in determining farmers’ adoption decisions on BNMS-rotation. Extension services and farmer-to-farmer technology diffusion channels were the major means of transfer of BNMS technologies.
Not all GKK $τ$-matrices are stable
Creators: name: Holtz, Olga
Publisher: name: arXiv
Year: 2005
Subjects: subject: Rings and Algebras (math.RA)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 15A18, 15A42, 34D20, 93D05, 47A75, 47B35

description: Hermitian positive definite, totally positive, and nonsingular M-matrices enjoy many common properties, in particular: (A) positivity of all principal minors, (B) weak sign symmetry, (C) eigenvalue monotonicity, (D) positive stability. The class of GKK matrices is defined by properties (A) and (B), whereas the class of nonsingular $τ$-matrices by (A) and (C). It was conjectured that: (A), (B) implies (D) [D. Carlson, J. Res. Nat. Bur. Standards Sect. B 78 (1974) 1-2], (A), (C) implies (D) [G.M. Engel and H. Schneider, Linear and Multilinear Algebra 4 (1976) 155-176], (A), (B) implies a property stronger than (D) [R. Varga, Numerical Methods in Linear Algebra, 1978, pp. 5-15], (A), (B), (C) implies (D) [D. Hershkowitz, Linear Algebra Appl. 171 (1992) 161-186]. We describe a class of unstable GKK $τ$-matrices, thus disproving all four conjectures.
description: 7 pages
Merging Cooperatives: Planning, Negotiating, Implementing
Creators: name: Swanson, Bruce L.
name: Swanson, Bruce L.
Publisher: name: Unknown
Year: 1985
Subjects: subject: Agribusiness
subject: Cooperatives
subject: reorganization
subject: merger
subject: consolidation
subject: acquisition
subject: negotiation

description: Guidelines for reorganization of cooperatives through merger, acquisition, or consolidation are provided. Planning, negotiating, and implementing phases of reorganization are covered. Items from actual combinations of cooperatives are reported as they relate to phases of the reorganization process.
Farmers' Supply-Purchasing Practices
Creators: name: Wissman, Roger A.
name: Wissman, Roger A.
Publisher: name: Unknown
Year: 1981
Subjects: subject: Agribusiness
subject: Purchasing practices
subject: farm supplies
subject: buying strategies
subject: price discounts
subject: cooperatives

description: Farmers' purchasing characteristics, reasons for choosing suppliers, and purchasing strategies were different for fertilizer, fuel, feed, and pesticide purchases of 100 commercial sized farmers. With fuel, few price discounts were received and few supplier changes made. More price adjustments and supplier changes occurred with fertilizer and pesticide purchases. Distribution systems influenced feed purchases. Fertilizer and pesticide purchases with quantity discounts or supplier negotiations were twice as large. Large farmers have more purchasing options. Cooperatives were valued as business organizations. Farmer purchasing strategies affect cooperatives and other supply organizations.
The sub-millimetre evolution of V4334 Sgr (Sakurai's Object)
Creators: name: Evans, A.
name: Geballe, T. R.
name: Tyne, V. H.
name: Pollacco, D.
name: Eyres, S. P. S.
name: Smalley, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the results of monitoring of V4334 Sgr (Sakurai's Object) at 450 microns and 850 microns with SCUBA on the James Clerk Maxwell Telescope. The flux density at both wavelengths has increased dramatically since 2001, and is consistent with continued cooling of the dust shell in which Sakurai's Object is still enshrouded, and which still dominates the near-infrared emission. Assuming that the dust shell is optically thin at sub-millimetre wavelengths and optically thick in the near-infrared, the sub-millimetre data imply a mass-loss rate during 2003 of ~3.4(+/0.2)E-5 for a gas-to-dust ratio of 75. This is consistent with the evidence from 1-5micron observations that the mass-loss is steadily increasing.
description: 5 pages, 4 eps figures, accepted for publication in MNRAS
A Tale of Two Theories: Quantum Griffiths Effects in Metallic Systems
Creators: name: Neto, A. H. Castro
name: Jones, B. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We show that two apparently contradictory theories on the existence of Griffiths-McCoy singularities in magnetic metallic systems [1,2] are in fact mathematically equivalent. We discuss the generic phase diagram of the problem and show that there is a non-universal crossover temperature range T* < T < W where power law behavior (Griffiths-McCoy behavior) is expect. For T
description: 4 pages, 2 figures
Experimental Estimation of Quantum State Properties from Classical Shadows
Creators: name: Struchalin, G. I.
name: Zagorovskii, Ya. A.
name: Kovlakov, E. V.
name: Straupe, S. S.
name: Kulik, S. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Full quantum tomography of high-dimensional quantum systems is experimentally infeasible due to the exponential scaling of the number of required measurements on the number of qubits in the system. However, several ideas were proposed recently for predicting the limited number of features for these states, or estimating the expectation values of operators, without the need for full state reconstruction. These ideas go under the general name of shadow tomography. Here we provide an experimental demonstration of property estimation based on classical shadows proposed in [H.-Y. Huang, R. Kueng, J. Preskill. Nat. Phys. https://doi.org/10.1038/s41567-020-0932-7 (2020)] and study its performance in the quantum optical experiment with high-dimensional spatial states of photons. We show on experimental data how this procedure outperforms conventional state reconstruction in fidelity estimation from a limited number of measurements.
description: 10 pages, 6 figures
A new consistent Neutron Star Equation of State from a Generalized Skyrme model
Creators: name: Adam, Christoph
name: Martín-Caro, Alberto García
name: García, Miguel Huidobro
name: Vázquez, Ricardo
name: Wereszczynski, Andrzej
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new equation of state for nuclear matter based on a generalized Skyrme model which is consistent with all current constraints on the observed properties of neutron stars. This generalized model depends only on two free parameters related to the ranges of pressure values at which different submodels are dominant, and which can be adjusted so that mass-radius and deformability constraints from astrophysical and gravitational wave measurements can be met. Our results support the Skyrme model and its generalizations as good candidates for a low energy effective field-theoretic description of nuclear matter even at extreme conditions such as those inside neutron stars.
description: 8 pages, 3 figures. Minor typos fixed. Version accepted for publication in Phys. Lett. B
Ecology and life history differences of bull trout (Salvelinus confluentus) living above and below barriers
Creators: name: Ladell, Jason J.
Publisher: name: University of British Columbia
Year: 2009

description: Bull trout populations in the Arrow Lakes exhibit two distinct life history patterns depending on whether they live above or below waterfall barriers. Migratory populations utilize the lower reaches of tributaries for spawning and rearing but resident populations carry out their entire life history upstream of waterfall barriers. Few studies have examined how these populations differ in terms of habitat preference or life history pattern. The specific objectives of this study were thus twofold. The first was to describe and quantify differences between habitat availability and use by resident versus migratory bull trout, and the second was to describe how certain life history parameters varied between the two populations. The physical environments of these two habitats showed distinct variation in temperature and physical habitat variables including stream size, water velocity, pool composition and available cover. Maximum summer water temperature and average summer water temperature were both lower above the barriers. However, bull trout utilized similar habitats irrespective of whether they were above or below barriers, and appeared to maintain positions in shallow, low velocity areas of the stream. Daytime cover associated with above-barrier fish was typically logjams or other instream woody debris, while below-barrier cover usually consisted of large boulder substrates. Densities of bull trout at all sites were similar to those reported from other populations and were temporally variable within and between sites. Movements of bull trout determined by mark-recapture rates showed that above-barrier fish exhibited a more restricted movement pattern than below-barrier fish. Evidence of life history differentiation between bull trout populations occurring above and below barriers included differences in growth rates, average lengths, morphology, and meristics. This study showed that bull trout populations occurring above and below waterfall barriers in the tributaries of the Arrow Lakes inhabit different physical environments, and that certain aspects of their life histories appear to reflect local adaptation to these distinct ecosystems.
Membership: an Organizational View
Creators: name: Gray, Thomas W.
name: Gray, Thomas W.
Publisher: name: Unknown
Year: 1991
Subjects: subject: Agribusiness
subject: Cooperative
subject: organization
subject: paradigm
subject: specialization
subject: coordination
subject: complexity
subject: stability/instability

description: This study examines the membership structure of a large centralized cooperative from an organizational workability view. Structure is created by dividing membership organizationally, i.e., assigning different roles and tasks to different groups of members, as well as to individual members, and bringing coordination to these differentiations. The membership structure of the case cooperative was found large in number of members, highly differentiated, and well coordinated. The structuring, i.e., creating a division of labor among the membership, and the coordinating of these divisions is done in response to conditions in the membership environment.
Anomalous quantum reflection of Bose-Einstein condensates from a silicon surface: the role of dynamical excitations
Creators: name: Scott, R. G.
name: Martin, A. M.
name: Fromhold, T. M.
name: Sheard, F. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the effect of inter-atomic interactions on the quantum-mechanical reflection of Bose-Einstein condensates from regions of rapid potential variation. The reflection process depends critically on the density and incident velocity of the condensate. For low densities and high velocities, the atom cloud has almost the same form before and after reflection. Conversely, at high densities and low velocities, the reflection process generates solitons and vortex rings that fragment the condensate. We show that this fragmentation can explain the anomalously low reflection probabilities recently measured for low-velocity condensates incident on a silicon surface.
description: 5 figures, 5 pages, references corrected
Farmer Cooperative Theory: Recent Developments
Creators: name: Staatz, John M.
name: Staatz, John M.
Publisher: name: Unknown
Year: 1989
Subjects: subject: Agribusiness
subject: Cooperative theory
subject: public policy
subject: market coordination
subject: economic performance
subject: finance
subject: pricing
subject: member control

description: Since 1980, agricultural economists have begun to reexamine fundamental issues in the theory of agricultural cooperation. These include the basic nature of farmer cooperation; the theoretical benefits and limits of cooperative enterprise; and the implications of these for cooperative members, managers, and public policy. Analysts have extended previous models of the cooperative as a type of business firm in order to analyze the impact of large cooperatives on market performance. They have also developed new models to analyze how cooperatives attempt to serve the divergent interests of different participants, such as managers and different classes of farmers. This report describes and evaluates recent theoretical developments, outlines remaining areas of conflict and gaps in the theory of agricultural cooperation, and discusses topics for future research. It concludes that one of the most promising areas for current research may be in testing hypothesis arising from current theoretical work.
title: Методика формирования универсальных учебных действий у младших школьников при обучении русскому языку
Creators: name: ELS IPR BOOKS
Publisher: name: Северо-Осетинский государственный педагогический институт
Year: 2020

description: В предлагаемом учебно-методическом пособии рассматриваются вопросы, отражающие теоретические и методические основы формирования универсальных учебных действий у обучающихся. Материалы, представленные в пособии, направлены на развитие у студентов профессиональных методических умений формирования универсальных учебных действий у младших школьников в процессе обучения русскому языку. Учебно-методическое пособие может быть рекомендовано обучающимся по направлениям подготовки 44.03.01 Педагогическое образование (профиль «Начальное образование») и 44.03.05 Педагогическое образование (профили «Начальное образование / Русский язык», профили «Начальное образование / Родной язык и литература», профили «Начальное образование / Дополнительное образование»).
D.3.1.5 Report on training activities (courses, workshops, exchanges, conferences & Marie Curie (month 49-66)
Creators: name: WU
name: SLU
Publisher: name: Zenodo
Year: 2005
Subjects: NoE and NEXUS Projects
The EuroFIR Food Platform
EuroFIR

description: D.3.1.5 Report on training activities (courses, workshops, exchanges, conferences & Marie Curie (month 49-66)
Dinâmica de sistemas aplicada à gestão de recursos hídricos em bacia hidrográfica
Creators: name: Vieira, Wilson Da Cruz
name: Vieira, Wilson Da Cruz
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: River basin
subject: System dynamics
subject: Water resources
subject: Water pricing
subject: Sustainability

description: The objective of this work was to analyze both the allocation of water among competing demands in a river basin and pricing policies for water. Based on a theoretical model that maximizes the net social benefits from the allocation of water over a finite period of time, it was used the dynamic systems approach to analyze various issues related to water resources management in a river basin, such as sustainability of water resources, and water pricing. The model was applied to the Araguari River Basin, located in the State of Minas Gerais.
Climate change impacts on Latin American farmland values: the role of farm type
Creators: name: Seo, S. Niggol
name: Mendelsohn, Robert
name: Seo, S. Niggol
name: Mendelsohn, Robert
Publisher: name: Unknown
Year: 2008
Subjects: subject: Environmental Economics and Policy
subject: Climate change
subject: Agriculture
subject: South America

description: This paper examines climate change impacts on South American agriculture using a set of Ricardian regressions estimated across different samples of farms in South America. Regressions are run for the whole sample and for subsamples of crop-only, mixed, and livestock-only farms. The results indicate that climate sensitivity varies a great deal across each type of farm. The analysis also reveals that the impacts will vary substantially across South America. The hot and wet Amazon and Equatorial regions are likely to lose the most from warming scenarios whereas the more temperate high elevation and southern regions of South America will likely gain.
title: Мировоззрение: синтез научного и художественного мышления в процессе обучения
Creators: name: ELS IPR BOOKS
Publisher: name: Северо-Осетинский государственный педагогический институт
Year: 2020

description: В монографии представлен анализ основных научных подходов к проблеме формирования научного мировоззрения студентов, рассмотрены и обоснованы методы и приемы научного и художественного мышления, а также форма их взаимопроникновения через синтез понятийных и наглядно-образных структур. На основании источников и научной литературы автор анализирует роль науки и искусства, их взаимодействие в структуре мировоззрения, описывает организацию и ход опытно-экспериментальной работы. Книга предназначена для преподавателей гуманитарного цикла, учителей изобразительного искусства. Опубликованный материал может быть использован также в рекламном производстве для улучшения его качества.
Aplicações e implicações do modelo principal-agente à luz de sua formulação linear-normal-exponencial
Creators: name: Resende Filho, Moises De Andrade
name: Resende Filho, Moises De Andrade
Publisher: name: Unknown
Year: 2008
Subjects: subject: Institutional and Behavioral Economics
subject: Principal-agent model
subject: Incentive mechanisms
subject: Theory of firm
subject: Theory of organizations

description: The principal-agent model can be more often employed as a conceptual framework for studies in the fields of economics and finance. This article presents real examples in which this theoretical model fits well. It is admitted that the complexity of this type of model can be a barrier to its use. Therefore, it is presented a typical principal-agent model that is simple enough to make it possible to find an analytical solution to the problem. It is shown, relying on the model’s closed-form solution, that moral hazard, in general, lowers efforts by the agent and expected profit for the principal. In fact, it is argued that the consequences of moral hazard would be even worst if no incentive mechanism were in place. Furthermore, it is shown that the greater are the measurement errors, the risk aversion and the cost of effort of the agent; the lower are the effort by the agent and the expected profit for the principal.
Impacto da febre aftosa no preço da arroba do boi gordo, recebido pelo produtor no Brasil
Creators: name: Teixeira, Gibran Da Silva
name: Maia, Sinezio Fernandes
name: Teixeira, Gibran Da Silva
name: Maia, Sinezio Fernandes
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Price
subject: Fatcow
subject: Aphthous fever

description: The objective of this study was to identify some facts that had influenced the fatcow arroba prices received by producers as well as carrying through estimates of these prices for a period of four months beginning in May 2007. It was used methodology idealized by Box-Jenkins (1976). The results demonstrated that the series in question (01/1996-05/2007) presents a structural breaking in the referring period the January of 2004, fact this that led to the cut of the same, being considered in the analysis the period February 2004 - May 2007, presenting 40 comments. Some events can have influenced the prices of the fatcow arroba in that moment and one that deserves prominence is the fact of that in period two infected areas of aphthous fever in the states of Amazonas and Pará had been detected what it caused the embargo of the exportations for Russia.
Spontaneous Symmetry Breaking in Photonic Lattices: Theory and Experiment
Creators: name: Kevrekidis, P. G.
name: Chen, Zhigang
name: Malomed, B. A.
name: Frantzeskakis, D. J.
name: Weinstein, M. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We examine an example of spontaneous symmetry breaking in a double-well waveguide with a symmetric potential. The ground state of the system beyond a critical power becomes asymmetric. The effect is illustrated numerically, and quantitatively analyzed via a Galerkin truncation that clearly shows the bifurcation from a symmetric to an asymmetric steady state. This phenomenon is also demonstrated experimentally when a probe beam is launched appropriately into an optically induced photonic lattice in a photorefractive material.
description: 4 pages, 3 figures
Additional file 2 of Ultrastructural and dynamic studies of the endosomal compartment in Down syndrome
Creators: name: Botté, Alexandra
name: Lainé, Jeanne
name: Xicota, Laura
name: Heiligenstein, Xavier
name: Fontaine, Gaëlle
name: Kasri, Amal
name: Rivals, Isabelle
name: Pollyanna Goh
name: Orestis Faklaris
name: Jack-Christophe Cossec
name: Morel, Etienne
name: Anne-Sophie Rebillat
name: Nizetic, Dean
name: Raposo, Graça
name: Potier, Marie-Claude
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 60506 Virology

description: Additional file 2: Supplementary Table. Demographic description of fibroblasts from euploid individuals and individuals with DS.
Loops structure of the Internet at the Autonomous System Level
Creators: name: Bianconi, Ginestra
name: Caldarelli, Guido
name: Capocci, Andrea
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We present here a study of the clustering and cycles in the graph of Internet at the Autonomous Systems level. We show that,even if the whole structure is changing with time, the statistical distributions of loops of order 3,4,5 remain stable during the evolution. Moreover we will bring evidence that the Internet graphs show characteristic Markovian signatures, since the loops structure is very well described by the two point correlations between the connectivities of the nodes. This represent another essential characteristic of this evolving graph. To capture this feature of the Internet represent one of the challenges in the future Internet modeling.
description: (4 pages, 3 figures)
Study of the decay mode D^0 -> K-K+pi-pi+
Creators: name: The FOCUS Collaboration
name: Link, J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Using data from the FOCUS (E831) experiment at Fermilab, we present a new measurement of the branching ratio for the Cabibbo-favored decay mode $D^0 \to K^-K^+π^-π^+$. From a sample of $2669 \pm 101$ fully reconstructed $D^0 \to K^-K^+π^-π^+$ events, we measure $Γ(D^0 \to K^-K^+π^-π^+)/Γ(D^0 \to K^-π^-π^+π^+) = 0.0295 \pm 0.0011(stat.) \pm 0.0008(syst.)$. A coherent amplitude analysis has been performed to determine the resonant substructure of this decay mode. This analysis reveals a dominant contribution from $D^0 \to K_1^+ K-$ modes.
description: 19 pages, 6 figures, to be submitted to Physics Letters B
A simple physical model for scaling in protein-protein interaction networks
Creators: name: Deeds, Eric J.
name: Ashenberg, Orr
name: Shakhnovich, Eugene I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: It has recently been demonstrated that many biological networks exhibit a scale-free topology where the probability of observing a node with a certain number of edges (k) follows a power law: i.e. p(k) ~ k^-g. This observation has been reproduced by evolutionary models. Here we consider the network of protein-protein interactions and demonstrate that two published independent measurements of these interactions produce graphs that are only weakly correlated with one another despite their strikingly similar topology. We then propose a physical model based on the fundamental principle that (de)solvation is a major physical factor in protein-protein interactions. This model reproduces not only the scale-free nature of such graphs but also a number of higher-order correlations in these networks. A key support of the model is provided by the discovery of a significant correlation between number of interactions made by a protein and the fraction of hydrophobic residues on its surface. The model presented in this paper represents the first physical model for experimentally determined protein-protein interactions that comprehensively reproduces the topological features of interaction networks. These results have profound implications for understanding not only protein-protein interactions but also other types of scale-free networks.
description: 50 pages, 17 figures