cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Aggregation Issues in the Estimation of Linear Programming Productivity Measures
Creators: name: Shaik, Saleem
name: Mishra, Ashok K.
name: Atwood, Joseph A.
name: Shaik, Saleem
name: Mishra, Ashok K.
name: Atwood, Joseph A.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Agribusiness
subject: Production Economics
subject: Aggregation
subject: Share-weights
subject: single and multiple output and input
subject: Malmquist productivity index
subject: Malmquist total factor productivity index

description: This paper demonstrates the sensitivity of the linear programming approach in the estimation of productivity measures in the primal framework using Malmquist productivity index and Malmquist total factor productivity index models. Specifically, the sensitivity of productivity measure to the number of constraints (level of dis-aggregation) and imposition of returns to scale constraints of linear programing is evaluated. Further, the shadow or dual values are recovered from the linear program and compared to the market prices used in the ideal Fisher index approach to illustrate sensitivity. Empirical application to U.S. state-level time series data from 1960-2004 reveal productivity change decreases with increases in the number of constraints. Further, the input and output shadow or dual values are skewed, leading to the difference in the productivity measures due to aggregation.
Supplementary material from Dietary antioxidants attenuate the endocrine stress response during long-duration flight of a migratory bird
Creators: name: Casagrande, Stefania
name: DeMoranville, Kristen
name: Trost, Lisa
name: Pierce, Barbara
name: Amadeusz Bryła
name: Dzialo, Maciej
name: Sadowska, Edyta T.
name: Bauchinger, Ulf
name: McWilliams, Scott R.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: Glucocorticoids (GCs) are metabolic hormones that promote catabolic processes, which release stored energy and support high metabolic demands such as during prolonged flights of migrating birds. Dietary antioxidants (e.g. anthocyanins) support metabolism by quenching excess reactive oxygen species produced during aerobic metabolism and also by activating specific metabolic pathways. For example, similar to GCs' function, anthocyanins promote the release of stored energy, although the extent of complementarity between GCs and dietary antioxidants is not well known. If anthocyanins complement GCs functions, birds consuming anthocyanin-rich food can be expected to limit the secretion of GCs when coping with a metabolically challenging activity, avoiding the exposure to potential hormonal detrimental effects. We tested this hypothesis in European starlings (Sturnus vulgaris) flying in a windtunnel. We compared levels of corticosterone, the main avian GCs, immediately after a sustained flight and at rest for birds that were fed diets with or without an anthocyanin supplement. As predicted, we found (i) higher corticosterone after flight than at rest in both diet groups and (ii) anthocyanin-supplemented birds had less elevated corticosterone after flight than unsupplemented control birds. This provides novel evidence that dietary antioxidants attenuate the activation of the HPA axis (i.e. increased secretion of corticosterone) during long-duration flight.
Adalékok „Vámbéry tatárjának” életrajzához : Molla Izsák magyarországi élete a korabeli sajtó tükrében
Creators: name: Péri, Benedek
Publisher: name: Kőrösi Csoma Társaság
Year: 2021

description: Keletkutatás, 2021. tavasz ISSN 0133-4778
Otto Benesch, The Drawings of Rembrandt
Creators: name: Haverkamp Begemann, Egbert
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2019

description: Rezension zu: Otto Benesch, The Drawings of Rembrandt, First complete Edition in six volumes, London, The Phaidon Press [1954- 1957].
description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Vol. 14 No. 1 (1961): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Price Transmission in Serbian Milk Commodity Chain
Creators: name: Popovic, Rade
name: Radovanov, Boris
name: Popovic, Rade
name: Radovanov, Boris
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Demand and Price Analysis
subject: Livestock Production/Industries
subject: price transmission
subject: milk and milk products
subject: milk supply chain
subject: market structure

description: Focus in the paper is on price transmission at Serbian dairy market. It analyzes milk price transmission for three products: pasteurized milk, white yoghurt and cheese. Those three products types participated in formal milk market with 65% of processed row milk. Monthly data are collected from three levels of milk chain: farm level, processors and retailers. Three step approach based on: intensity, asymmetry and time lags in price transmission was applied. Distinction of two market levels was made, first between farmers and processors and second among processors and retailers. Additionally price transmission from world to nationally market was examined.
description: Paper presented at Challenges for Analysis of the Economy, the Businesses and Social Progress International Scientific Conference, Szeged, Hungary, November 19-21, 2009
Exclusive radiative and electroweak b->d and b->s penguin decays at NLO
Creators: name: Beneke, M.
name: Feldmann, Th.
name: Seidel, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We provide Standard Model expectations for the rare radiative decays B->K^* gamma, B->rho gamma and B-> omega gamma, and the electroweak penguin decays B->K^* l^+ l^- and B->rho l^+ l^- at the next-to-leading order (NLO), extending our previous results to b->d transitions. We consider branching fractions, isospin asymmetries and direct CP asymmetries. For the electroweak penguin decays, the lepton-invariant mass spectrum and forward-backward asymmetry is also included. Radiative and electroweak penguin transitions in b->d are mainly interesting in the search for new flavour-changing neutral current interactions, but in addition the B->rho gamma decays provide constraints on the CKM parameters (\barρ,\barη). The potential impact of these constraints is discussed.
description: 29 pages, LaTeX
Contrastive Research on Domestic and Foreign Ecological Agriculture Policies
Creators: name: Chen, Jianwei
name: Qi, Yan-Bin
name: Zhao, Yufeng
name: Chen, Jianwei
name: Qi, Yan-Bin
name: Zhao, Yufeng
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Ecological agriculture
subject: Policies
subject: Agricultural subsidies
subject: Sustainable development
subject: China

description: In the first place, the definitions of ecological agriculture defined by scholars both at home and abroad are introduced. In the second place, the domestic and foreign ecological agriculture policies are expounded. Through contrastive research on the domestic and foreign ecological agriculture polices, the problems in the development of ecological agriculture in China are found. By mirroring the western experiences in developing ecological agriculture, the countermeasures and relevant suggestions are put forward from the perspective of government. The first one is to increase the subsidies from the government to ecological agriculture. The second one is to clarify the standard of ecological agriculture construction. The third one is to promote the industrialization of ecological agriculture. The fourth one is to strengthen the construction of ecological demonstration region and ecological village.
Evaluation on Agricultural Regional Coordination Degree of Beijing, Tianjin and Hebei
Creators: name: He, Ling
name: Jia, Qijian
name: Wang, Jun
name: He, Ling
name: Jia, Qijian
name: Wang, Jun
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Agricultural cooperation
subject: Coordination degree
subject: Beijing
subject: Tianjin and Hebei
subject: China

description: According to the characteristics of agricultural system in Beijing, Tianjin and Hebei, population pressure, resource utilization and construction capability are taken as the first grade indices. And There are a total of 14 second grade indices, such as the per capita cultivated land, per capita grain yield, per capita meat product, per capita aquatic product, per capita fruit, per capita water resource, per capita GDP, multiple cropping index, and proportion of agricultural expenditure in financial expenditure. An evaluation theory system for the coordination degree of agricultural system is established; and the empirical study on the agricultural coordination degree of Beijing, Tianjin and Hebei is carried out. Result shows that agricultural cooperative development in Beijing, Tianjin and Hebei is still in its primary stage. It is put forward that ideology is the premise, plan should take the lead, transportation is the foundation, and enhancing the brand is the key. Countermeasures are put forward for the agricultural cooperative development in Beijing, Tianjin and Hebei, such as enhancing the sense of strategic positioning during agricultural cooperative development in Beijing, Tianjin and Hebei, promoting the agricultural cooperative development planning in Beijing, Tianjin and Hebei, establishing a modern and integrated transport network system, strengthening the agricultural science and technology support, and improving the grade of agricultural products.
Comment on "Hiding the Cosmological Constant"
Creators: name: Wang, Qingdi
name: Unruh, William G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We comment on S. Carlip's recent Letter "Hiding the Cosmological Constant" [Phys. Rev. Lett. 123, 131302].
description: 1 page
Sources of intraspecific morphological variation in Vipera seoanei: Allometry, sex, and colour phenotype
Creators: name: Lucchini, Nahla
name: Kaliontzopoulou, Antigoni
name: Val, Guillermo Aguado
name: Martínez-Freiría, Fernando
Publisher: name: Brill Online
Year: 2020
Subjects: subject: 60299 Ecology not elsewhere classified
subject: FOS: Biological sciences

description: Snakes frequently exhibit ontogenetic and sexual variation in head dimensions, as well as the occurrence of distinct colour morphotypes which might be fitness-related. In this study, we used linear biometry and geometric morphometrics to investigate intraspecific morphological variation related to allometry and sexual dimorphism in Vipera seoanei, a species that exhibits five colour morphotypes, potentially subjected to distinct ecological pressures. We measured body size (SVL), tail length and head dimensions in 391 specimens, and examined variation in biometric traits with respect to allometry, sex and colour morph. In addition, we analysed head shape variation by recording the position of 29 landmarks in 123 specimens and establishing a low-error protocol for implementing geometric morphometrics to European vipers. All head dimensions exhibited significant allometry, while sexual differences occurred for SVL, relative tail length and snout height. After considering size effects, we found significant differences in body proportions between the sexes and across colour morphs, which suggests an important influence of lowland and montane habitats in shaping morphological variation. By contrast, head shape did not exhibit significant variation across sexes or colour morphs. Instead it was mainly associated to allometric variation, where the supraocular and the rear regions of the head were the areas that varied the most throughout growth and across individuals. Overall, this study provides a thorough description of morphological variability in Vipera seoanei and highlights the relevance of combining different tools (i.e. linear and geometric morphometrics) and analyses to evaluate the relative contribution of different factors in shaping intraspecific variation.
Limit laws of estimators for critical multi-type Galton-Watson processes
Creators: name: Chi, Zhiyi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J80 (Primary) 60F05 (Secondary)

description: We consider the asymptotics of various estimators based on a large sample of branching trees from a critical multi-type Galton-Watson process, as the sample size increases to infinity. The asymptotics of additive functions of trees, such as sizes of trees and frequencies of types within trees, a higher-order asymptotic of the ``relative frequency'' estimator of the left eigenvector of the mean matrix, a higher-order joint asymptotic of the maximum likelihood estimators of the offspring probabilities and the consistency of an estimator of the right eigenvector of the mean matrix, are established.
description: Published at http://dx.doi.org/10.1214/105051604000000521 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Method of Farmland Grading by MAPGIS-Taking Fengkai County of Zhaoqing City in Guangdong as a Case
Creators: name: Zhao, Yangshe
name: Zhao, Yangshe
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Farmland grading
subject: Geography information system
subject: MAPGIS software
subject: China

description: Taking Fengkai County of Guangdong Province as an example of the application of GIS technology in farmland grading. The application of GIS in farmland grading is discussed in order to provide a professional and high-efficient method to complete the work. The function of space analysis of MAPGIS software shows advantages in speed and precision and is regarded as a new way of farmland grading.
The Industrial Structure Efficiency of Gansu Province since the Start of Reform and Opening up
Creators: name: Ji, Yahui
name: Zhu, Fengwen
name: Ji, Yahui
name: Zhu, Fengwen
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Industrial structure efficiency
subject: Comparative labor productivity
subject: Deviation degree of industrial structure
subject: Shift—share model
subject: China

description: According to the time series data of relevant industrial from 1978 to 2008 in Gansu province，the industrial structure efficiency of Gansu Province is studied from different perspectives based on the basis of the overview of the analysis methods and by applying the analysis models including comparative labor productivity, deviation degree of industrial structure and shift—share analysis model. The results show that, in Gansu Province, the comparative labor productivity is low in the primary and tertiary industries, while that in the second industry is high; the deviation coefficient of industrial structure is big and the industry structure and employment structure is extremely asymmetric; the proportion of sunrise industry is large and has great contribution to economic growth. However, the competiveness of the three main industries is relatively weak and need further improvement.
Data Mining in Gamma Astrophysics Experiments
Creators: name: Frailis, M.
name: De Angelis, A.
name: Roberto, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Data mining techniques, including clustering and classification tasks, for the automatic information extraction from large datasets are increasingly demanded in several scientific fields. In particular, in the astrophysical field, large archives and digital sky surveys with dimensions of 10E12 bytes currently exist, while in the near future they will reach sizes of the order of 10E15. In this work we propose a multidimensional indexing method to efficiently query and mine large astrophysical datasets. A novelty detection algorithm, based on the Support Vector Clustering and using density and neighborhood information stored in the index structure, is proposed to find regions of interest in data characterized by isotropic noise. We show an application of this method for the detection of point sources from a gamma-ray photon list.
description: 5 pages, 2 figures, to be published in the Proceedings of the 6th International Symposium ''Frontiers of Fundamental and Computational Physics'' (FFP6), Udine (Italy), Sep. 26-29, 2004
Supporting figures and tables from Changes in taxonomic and phylogenetic diversity in the anthropocene
Creators: name: Daijiang Li
name: Olden, Julian D.
name: Lockwood, Julie L.
name: Sydne Record
name: McKinney, Michael L.
name: Baiser, Benjamin
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: To better understand how ecosystems are changing, a multifaceted approach to measuring biodiversity that considers species richness (SR) and evolutionary history across spatial scales is needed. Here, we compiled 162 datasets for fish, bird and plant assemblages across the globe and measured how taxonomic and phylogenetic diversity changed at different spatial scales (within site α diversity and between sites spatial β diversity). Biodiversity change is measured from these datasets in three ways: across land use gradients, from species lists and through sampling of the same locations across two time periods. We found that local SR and phylogenetic α diversity (Faith's PD) increased for all taxonomic groups. However, when measured with a metric that is independent of SR (phylogenetic species variation, PSV), phylogenetic α diversity declined for all taxonomic groups. Land use datasets showed declines in SR, Faith's PD and PSV. For all taxonomic groups and data types, spatial taxonomic and phylogenetic β diversity decreased when measured with Sorensen dissimilarity and phylogenetic Sorensen dissimilarity, respectively, providing strong evidence of global biotic homogenization. The decoupling of α and β diversity, as well as taxonomic and phylogenetic diversity, highlights the need for a broader perspective on contemporary biodiversity changes. Conservation and environmental policy decisions thus need to consider biodiversity beyond local SR to protect biodiversity and ecosystem services.
Probing thermal magnon current mediated by coherent magnon via nitrogen-vacancy centers in diamond
Creators: name: Prananto, Dwi
name: Kainuma, Yuta
name: Hayashi, Kunitaka
name: Mizuochi, Norikazu
name: Uchida, Ken-ichi
name: An, Toshu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Currently, thermally excited magnons are being intensively investigated owing to their potential in computing devices and thermoelectric conversion technologies. We report the detection of thermal magnon current propagating in a magnetic insulator yttrium iron garnet under a temperature gradient using a quantum sensor: electron spins associated with nitrogen-vacancy (NV) centers in diamond. Thermal magnon current was observed as modified Rabi oscillation frequencies of NV spins hosted in a beam-shaped bulk diamond that resonantly coupled with coherent magnon propagating over a long distance. Additionally, using a nanodiamond, alteration in NV spin relaxation rates depending on the applied temperature gradient were observed under a non-resonant NV excitation condition. The demonstration of probing thermal magnon current mediated by coherent magnon via NV spin states serves as a basis for creating a device platform hybridizing spin caloritronics and spin qubits.
description: 29 pages, 4 figures
Band structure of twisted bilayer graphene on hexagonal boron nitride
Creators: name: Cea, Tommaso
name: Pantaleon, Pierre A.
name: Guinea, Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The effect of an hexagonal boron nitride (hBN) layer close aligned with twisted bilayer graphene (TBG) is studied. At sufficiently low angles between twisted bilayer graphene and hBN, $θ_{hBN} \lesssim 2^\circ$, the graphene electronic structure is strongly disturbed. The width of the low energy peak in the density of states changes from $W \sim 5 - 10$ meV for a decoupled system to $\sim 20 - 30$ meV. Spikes in the density of states due to van Hove singularities are smoothed out. We find that for a realistic combination of the twist angle in the TBG and the twist angle between the hBN and the graphene layer the system can be described using a single moiré unit cell.
description: 7+10 pages; main text + supplementary information
The effects of nuclear structure on generalized parton distributions of 3He
Creators: name: Scopetta, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The effect of the nuclear medium on generalized parton distributions (GPDs) is studied for the 3He nucleus, through a realistic microscopic analysis. In Impulse Approximation, Fermi motion and binding effects, evaluated by modern potentials, are found to be larger than in the forward case and very sensitive to the details of nuclear structure at short distances.
description: 4 pages, talk given at the Conference "Baryons 2004", October 25-29 2004, Pailaseau (France), to be published by Nuc. Phys. A
Appendix S1 - S3 from Cross-ecosystem bottlenecks alter reciprocal subsidies within meta-ecosystems
Creators: name: Klemmer, Amanda J.
name: Galatowitsch, Mark L.
name: McIntosh, Angus R.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Reciprocal subsidies link ecosystems into meta-ecosystems, but energy transfer to organisms that do not cross boundaries may create sinks, reducing reciprocal subsidy transfer. We investigated how the type of subsidy and top predator presence influenced reciprocal flows of energy, by manipulating the addition of terrestrial leaf and terrestrial insect subsidies to experimental freshwater pond mesocosms with and without predatory fish. Over 18 months, fortnightly addition of subsidies (terrestrial beetle larvae) to top-predators was crossed with monthly addition of subsidies (willow leaves) to primary consumers in mesocosms with and without top predators (upland bullies) in a 2 × 2 × 2 factorial design in four replicate blocks. Terrestrial insect subsidies increased reciprocal flows, measured as the emergence of aquatic insects out of mesocosms, but leaf subsidies dampened those effects. However, the presence of fish and snails, consumers with no terrestrial life stage, usurped and retained the energy within in the aquatic ecosystem, creating a cross-ecosystem bottleneck to energy flow. Thus, changes in species composition of donor or recipient food webs within a meta-ecosystems can alter reciprocal subsidies through cross-ecosystem bottlenecks.
(3+3) Schiff-base metallomacrocycles and their aggregation in solution
Creators: name: Ma, Tsz Lui Cecily
Publisher: name: University of British Columbia
Year: 2009

description: Conjugated macrocycles are attractive precursors to new materials such as porous solids, synthetic ion channels, catalysts and other supramolecular materials. The development of these cyclic molecules for applications has been limited by the synthetic difficulties inherent in assembling a complex molecule. Imine formation by the condensation of an amine and an aldehyde is a convenient method for assembling large molecules. Since this reaction is reversible, macrocycles can be obtained under thermodynamic control. Large shape-persistent conjugated macrocycles (14-16) with tunable pore diameters in the nanometer regime were prepared by employing Schiff-base chemistry without the necessity of an added template. These new self-assembled macrocycles contain three N₂O₂ pockets, which can bind to multiple metal ions (e.g. Zn²⁺), forming soluble luminescent complexes (17 and 18a). The fluorescence of the macrocycles (14-16) could also be quenched by the coordination of metal ions (e.g. Ni²⁺ , Cu²⁺) in the three N₂O₂ pockets. The aggregation behaviour of the zinc metallated macrocycles (17 and 18a) in solution was investigated by ¹H NMR, absorption and fluorescence spectroscopies. It was discovered that solvent can play a crucial role in the association of the metallomacrocycles. The macrocyclic assemblies can sense coordinating bases, which cause deaggregation of the supramolecular assemblies. The aggregation was not disrupted by polar solvents, suggesting the association of the metallomacrocycles involved an additional interaction, Zn—O coordination, rather than solely hydrogen bonding or π-stacking of aromatic units.
de Sitter attractors in generalized gravity
Creators: name: Faraoni, Valerio
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We obtain conditions for the existence and stability of de Sitter attractors in the phase space of spatially homogeneous and isotropic cosmology in generalized theories of gravity (including non-linear and scalar-tensor theories). These conditions are valid for any form of the coupling functions of the theory. Stability with respect to inhomogeneous perturbations is analyzed using a covariant and gauge-invariant formalism. The relevance for inflationary scenarios of the early universe and for quintessence models of the present era is discussed.
description: 39 pages, LaTeX, to appear in Physical Review D
Flux of light antimatter nuclei near earth, induced by Cosmic Rays in the Galaxy and in the atmosphere
Creators: name: Duperray, R.
name: Baret, B.
name: Maurin, D.
name: Boudoul, G.
name: Barrau, A.
name: Derome, L.
name: Protasov, K.
name: Buenerd, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The fluxes of light antinuclei A<=4 induced near earth by Cosmic Ray intera ctions with the interstellar matter in the Galaxy and with the Earth atmosphere, are calculated in a phenomenological framework. The hadronic production cross section for antinucleons is based on a recent parametrization of a wide set of accelerator data. The production of light nuclei is calculated using coalescence models. For the standard coalescence model, the coalescence radius is fitted to the available experimental data. The non annihilating inelastic scattering process for the antideuterons is discussed and taken into account for the first time via a more realistic procedure than used so far for antiprotons.
description: 22 pages, 18 figures, 3 tables. Accepted for publication in Phys. Rev. D
Changing and Developing Trend of the Farmland Requisition-Compensation Balance Policy in China
Creators: name: Wang, Meinong
name: Liu, Xu
name: Wang, Bo
name: Wang, Meinong
name: Liu, Xu
name: Wang, Bo
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Requisition-compensation balance
subject: farmland protection
subject: policy change
subject: China

description: The importance and necessity of implementing the balance system of farmland requisition and compensation are reasoned. The changing path of the balance system of farmland requisition-compensation is overviewed. In addition, the problems exist in the implementation of the balance system of farmland requisition-compensation are analyzed as well, covering the increasing demands on land in the process of economic development; the serious phenomenon of wasting land in urban construction; part of farmlands should be revoked from the perspective of ecological construction and environmental protection, which lead to the shortage of reserved farmlands and it is hard to implement the balance system of farmland requisition-compensation; the problems of “occupying more but compensating less，occupying good land but compensating bad land” are universal; the development and reclamation of farmlands have taken certain threats to ecological environment; the differences of various regions have not been taken into consideration in implementing the balance system of farmland requisition-compensation. Some notes on the developing trend of farmlands requisition-compensation balance system are put forward. The farmlands should be occupied after being compensated first, so as to ensure the dynamic balance of the total amount of farmlands; the government should encourage the improvement of farmlands with mediocre and low output, so as to enhance its production capability; the potential of urban and rural construction land use should be fully developed and the occupation of farmlands should be reduced as few as possible; various aspects should be cooperated to increase the possibility of requisition-compensation among different regions.
Effect of whitening toothpaste on surface roughness and micro hardness of human teeth - A systematic review and meta analysis
Creators: name: Jamwal, Navodita
name: Rao, Ashwini
name: Shenoy, Ramya
name: Pai, Mithun
name: KS, Aparna
name: BR, Avinash
Publisher: name: figshare
Year: 2021
Subjects: subject: 110599 Dentistry not elsewhere classified
subject: FOS: Clinical medicine

description: Protocol
Sind die Pachten im Osten zu niedrig oder im Westen zu hoch?
Creators: name: Margarian, Anne
name: Margarian, Anne
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: Farm Management
subject: Land Economics/Use
subject: Bodenmarkt
subject: Agrarstrukturwandel
subject: Marktmacht
subject: land market
subject: structural change
subject: market power

description: Zusammenfassung : Die Pachtpreise für Land in den neuen Bundesländern Deutschlands liegen deutlich unter denen im früheren Bundesgebiet. Im vorliegenden Bericht wird diskutiert, in wie weit das durch Skaleneffekte, die Marktmacht großer Betriebe, staatliche Regulationen der Pachtmärkte im Osten und/oder einen verzögerten Agrarstrukturwandel im Westen erklärt werden kann. Das Schätzmodell auf Landkreisebene zeigt einen nicht-linearen Zusammenhang zwischen den Erklärungsgrößen und den Pachtpreisen. Darüber hinaus spielt im Osten die Betriebsstruktur in der Erklärung der Pachtpreise eine untergeordnete Rolle, während die relative Immobilität der Betriebe im Westen zumindest teilweise die "zu hohen" Pachtpreise dort erklärt. --------------------------------------------------------------------------------------------------------------------------------------- Summary: Rental prices for land are much lower in Germany's east than in the old western federal states. We discuss in how far this might be explained by scale effects, by market power of huge farms, by government regulation of the land market in the east and/or by a delayed structural change in the west. The estimation on district level shows a non-linear relation between explanatory variables and rental prices. Moreover, in the east, farm structure has only a secondary role in the explanation of rental prices. At the same time, for the west, results imply that the relative immobility of farms in the west partly explain the observed disproportionally high prices there.
Hervé Latapie, auteur, activiste gay, Blog Mediapart
Creators: name: Leibowitch, Jacques (1942-2020)
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020

description: 1 fichier (1 page). Transféré à Caroline Petit
description: created: start=2011-12-16;end=2019-06-04
3He structure from coherent hard exclusive processes
Creators: name: Scopetta, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hard exclusive processes, such as deep electroproduction of photons and mesons off nuclear targets, could give access, in the coherent channel, to nuclear generalized parton distributions (GPDs). Here, a realistic microscopic calculation of the unpolarized quark GPD H_q of the 3He nucleus is reviewed. In Impulse Approximation, H_q is obtained as a convolution between the GPD of the internal nucleon and the non-diagonal spectral function, describing properly Fermi motion and binding effects. The obtained formula has the correct limits. Nuclear effects, evaluated by a modern realistic potential, are found to be larger than in the forward case. In particular, they increase with increasing the momentum transfer and the asymmetry of the process. Another feature of the obtained results is that the nuclear GPD cannot be factorized into a Delta^2-dependent and a Delta^2-independent term, as suggested in prescriptions proposed for finite nuclei. The dependence of the obtained GPDs on different realistic potentials used in the calculation shows that these quantities are sensitive to the details of nuclear structure at short distances.
description: 8 pages, talk given at the "X Convegno su problemi di fisica nucleare teorica", October 6-9, 2004, Cortona, Italy. To appear in the Proceedings
Crop Supply Response under Risk: Impacts of Emerging Issues on Southeastern U.S. Agriculture
Creators: name: Liang, Yan
name: Miller, J. Corey
name: Harri, Ardian
name: Coble, Keith H.
name: Liang, Yan
name: Miller, J. Corey
name: Harri, Ardian
name: Coble, Keith H.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: acreage supply
subject: crop supply response model
subject: risk analysis
subject: Southeast U.S. agriculture

description: In this paper we consider factors that affect both crop prices and yields in order to examine supply responses of major crops in the Southeast. Due to the variable nature of crop production in the Southeast, previous studies that ignore price and yield risk may fail to capture one of the salient features of the region’s agriculture. Our results indicate supply elasticity values for corn, cotton, and soybeans of approximately 0.670, 0.506, and 0.195, respectively. Compared with the results of studies in other regions, corn and cotton acres respond more to price changes and soybean acres respond less to price changes.
An Evaluation of Factors Affecting the Choice of Coastal Recreational Activities
Creators: name: Paudel, Krishna P.
name: Caffey, Rex H.
name: Devkota, Nirmala
name: Paudel, Krishna P.
name: Caffey, Rex H.
name: Devkota, Nirmala
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: coastal recreation
subject: destination use preference
subject: multinomial logit

description: A visitor’s decision to use a particular recreational site is influenced by the individual’s taste as well as the characteristics of the site. For this reason, improved knowledge of the visitors’ interests and factors influencing their choices are vital for both planning and policy formulations in coastal development. This study examines visitor characteristics and desired site specific characteristics in order to determine the factors affecting use of the Louisiana coast for specific recreational purposes. We use a multinomial logit model and internet survey data to evaluate the factors affecting individuals’ decisions to visit coastal Louisiana for a specific use. Results suggest that the major variables affecting the choice of coastal recreational activities include environmental quality of the site, income, and travel time.
Assessing Consumer Willingness to Pay for Value-Added Blueberry Products Using a Payment Card Survey
Creators: name: Hu, Wuyang
name: Woods, Timothy A.
name: Bastin, Sandra
name: Cox, Linda J.
name: You, Wen
name: Hu, Wuyang
name: Woods, Timothy A.
name: Bastin, Sandra
name: Cox, Linda J.
name: You, Wen
Publisher: name: Unknown
Year: 2011
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: Marketing
subject: FOS: Economics and business
subject: blueberry
subject: payment card contingent valuation
subject: value-added
subject: willingness to pay

description: This study offers insights on consumer acceptance and willingness to pay for three value-added blueberry products. A modified payment card approach was used. The analytical framework adopted allows the researcher to attach straightforward economic interpretation to the estimated impacts of willingness to pay factors. Results show consumer socio-economic characteristics are important determinants but play different roles depending on the products. Information on health benefits may also be important. However, it is found that outside information or consumer self-stated awareness of blueberries’ health benefits have different impacts. These impacts may function as substitutes rather than complements to each other.
Dust emission model of Lyman-break galaxies
Creators: name: Takeuchi, Tsutomu T.
name: Ishii, Takako T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Lyman-break galaxies (LBGs) contain a non-negligible amount of dust. Takeuchi et al. (2003)(T03) constructed a model of the infrared spectral energy distribution (SED) for very young galaxies by taking into account the dust size distribution in the early stage of galaxy evolution, which can be different from that of present-day evolved galaxies. We applied T03 model to LBGs and constructed their expected SED. In order to examine the grain size distribution of dust, we calculated the SEDs based on two distinct type of the distribution models: a single-sized distribution and a power-law distribution with a slope of $dN/da \propto a^{-3.5}$. We found that the single-sized and power-law dust size distributions yield a very similar detectability of LBGs at the submillimetre (submm). We also found that galaxies with a power-law dust distribution have much less flux at mid-infrared (MIR) than the other. Then, we applied the model to a gravitationally lensed LBG \cb (cB58), a unique probe of the dust emission from LBGs. Our model framework well reproduced the hot dust temperature under a natural assumption for this galaxy. We also examined the detectability of LBGs at submm wavelengths in an eight-hour deep survey by ALMA. By integrating over their redshifted SEDs with the observed luminosity functions, we obtained the contribution of LBGs to the cosmic infrared background radiation (CIRB). Although they have non-negligible amount of dust, their contribution was found to be small, especially in the FIR $\sim 200 μ$m. Thus, we need a strongly obscured population of galaxies which contains a large amount of star formation, at some epoch in the history of the universe.
description: 12 pages, 11 figures, accepted for publication in A&A
Scalarons mimicking Dark Matter in the Hu-Sawicki model of f(R) gravity
Creators: name: Parbin, Nashiba
name: Goswami, Umananda Dev
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we conduct a study on the scalar field obtained from $\mathit{f(R)}$ gravity via Weyl transformation of the spacetime metric $g_{μν}$ from the Jordan frame to the Einstein frame. The scalar field is obtained as a result of the modification in the geometrical part of Einstein's field equation of General Relativity. For the Hu-Sawicki model of $\mathit{f(R)}$ gravity, we find the effective potential of the scalar field and calculate its mass. Our study shows that the scalar field (also named as scalaron) obtained from this model has the chameleonic property, i.e.\ the scalaron becomes light in the low-density region while it becomes heavy in the high-density region of matter. Then it is found that the scalaron can be regarded as a dark matter (DM) candidate since the scalaron mass is found to be quite close to the mass of ultralight axions, a prime DM candidate. Thus the scalaron in the Hu-Sawicki model of $\mathit{f(R)}$ gravity behaves as DM. Further, a study on the evolution of the scalaron mass with the redshift is also carried out, which depicts that scalaron becomes light with expansion of the Universe and with different rates at different stages of the Universe.
description: 14 pages, 7 figures
Computation of the strong coupling in QCD with two dynamical flavours
Creators: name: Della Morte, Michele
name: Frezzotti, Roberto
name: Heitger, Jochen
name: Rolf, Juri
name: Sommer, Rainer
name: Wolff, Ulli
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a non-perturbative computation of the running of the coupling alpha_s in QCD with two flavours of dynamical fermions in the Schroedinger functional scheme. We improve our previous results by a reliable continuum extrapolation. The Lambda-parameter characterizing the high-energy running is related to the value of the coupling at low energy in the continuum limit. An estimate of Lambda*r_0 is given using large-volume data with lattice spacings a from 0.07 fm to 0.1 fm. It translates into Lambda_{MSbar}^{(2)}=245(16)(16) MeV [assuming r_0=0.5 fm]. The last step still has to be improved to reduce the uncertainty.
description: 34 pages including figures and tables, latex2e
The Effect of Social Capital on the Choice to Use Sustainable Agricultural Practices
Creators: name: Munasib, Abdul B.A.
name: Jordan, Jeffrey L.
name: Munasib, Abdul B.A.
name: Jordan, Jeffrey L.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: Production Economics
subject: adoption
subject: associational memberships
subject: community involvement
subject: social capital
subject: sustainable agriculture

description: We investigate whether social capital in the form of community involvement affects farmers’ choice to use sustainable agricultural practices. Using associational memberships as a measure of community involvement we study its effects on agricultural practices among Georgia farmers. Our findings show that, first, community involvement had a positive effect on the decision to adopt sustainable agricultural practices, and, secondly, it also had a positive effect on the extent to which farmers adopt these practices. These findings establish an additional dimension to the benefits that would accrue to policies that promote social interaction and civic engagement in rural areas.
Effective conductivity of 2D isotropic two-phase systems in magnetic field
Creators: name: Bulgadaev, S. A.
name: Kusmartsev, F. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using the linear fractional transformation, connecting effective conductivities sigma_{e} of isotropic two-phase systems with and without magnetic field, explicit approximate expressions for sigma_{e} in a magnetic field are obtained. They allow to describe sigma_{e} of various inhomogeneous media at arbitrary phase concentrations x and magnetic fields. the x-dependence plots of sigma_e at some values of inhomogeneity and magnetic field are constructed. Their behaviour is qualitatively compatible with the existing experimental data. The obtained results are applicable for different two-phase systems (regular and nonregular as well as random), satisfying the symmetry and self-duality conditions, and admit a direct experimental checking.
description: 9 pages, 2 figures, Latex2e, small corrections and new figures
Appendix: stability analysis from Superorganismal anisogamy: queen-male dimorphism in eusocial insects
Creators: name: Lehtonen, Jussi
name: Helanterä, Heikki
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences

description: Stability analysis for equilibria derived in the main text
Disentangling Access and View Amenities in Access-Restricted Coastal Residential Communities
Creators: name: Morgan, O. Ashton
name: Hamilton, Stuart E.
name: Morgan, O. Ashton
name: Hamilton, Stuart E.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Environmental Economics and Policy
subject: Land Economics/Use
subject: beach access
subject: property viewshed
subject: spatial hedonic model
subject: willingness to pay

description: In coastal communities with uniform flood risk, amenity value is comprised of two components – view and access. Having controlled for view, it is assumed that any residual amenity value represents the benefit derived from accessing the beach for leisure/recreational purposes. However, as properties closer to the beach typically have improved viewsheds, the two amenities are highly correlated, and disentangling view and access is problematical. A spatial autoregressive hedonic model captures ease of beach access via a network distance parameter that varies independently from property viewshed, collinearity effects are mitigated, and access and view can be disentangled.
On the Convergence of Nested Decentralized Gradient Methods with Multiple Consensus and Gradient Steps
Creators: name: Berahas, Albert S.
name: Bollapragada, Raghu
name: Wei, Ermin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: In this paper, we consider minimizing a sum of local convex objective functions in a distributed setting, where the cost of communication and/or computation can be expensive. We extend and generalize the analysis for a class of nested gradient-based distributed algorithms (NEAR-DGD; Berahas, Bollapragada, Keskar and Wei, 2018) to account for multiple gradient steps at every iteration. We show the effect of performing multiple gradient steps on the rate of convergence and on the size of the neighborhood of convergence, and prove R-Linear convergence to the exact solution with a fixed number of gradient steps and increasing number of consensus steps. We test the performance of the generalized method on quadratic functions and show the effect of multiple consensus and gradient steps in terms of iterations, number of gradient evaluations, number of communications and cost.
description: 12 pages, 4 figures. arXiv admin note: text overlap with arXiv:1903.08149
On Sampling of stationary increment processes
Creators: name: Albin, J. M. P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G10, 60G70 (Primary) 60G15, 68U20. (Secondary)

description: Under a complex technical condition, similar to such used in extreme value theory, we find the rate q(ε)^{-1} at which a stochastic process with stationary increments ξshould be sampled, for the sampled process ξ(\lfloor\cdot /q(ε)\rfloor q(ε)) to deviate from ξby at most ε, with a given probability, asymptotically as ε\downarrow0. The canonical application is to discretization errors in computer simulation of stochastic processes.
description: Published at http://dx.doi.org/10.1214/105051604000000468 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)