cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
THE GROWTH IN ORGANIC AGRICULTURE: TEMPORARY SHIFT OR STRUCTURAL CHANGE?
Creators: name: Gardebroek, Cornelis
name: Jongeneel, Roelof A.
name: Gardebroek, Cornelis
name: Jongeneel, Roelof A.
Publisher: name: Unknown
Year: 2004
Subjects: Farm Management

description: This paper investigates the growth in the number of organic producers in the Netherlands. Using Bayesian techniques a logistic growth model explaining the share of organic farms is estimated. Prior information is used to estimate and compare three different models on the future of organic farming.
Herder-Verlag, Das Erbe der Reformation in katholischer Sicht
Creators: name: Mumm, Reinhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 2 (1964): Ökumenische Rundschau, Band 13, Heft 2
MIGRATION AND LOCAL OFF-FARM WORKING IN RURAL CHINA
Creators: name: Chen, Zhuo
name: Huffman, Wallace E.
name: Rozelle, Scott
name: Chen, Zhuo
name: Huffman, Wallace E.
name: Rozelle, Scott
Publisher: name: Unknown
Year: 2004
Subjects: Labor and Human Capital

description: The paper analyzes the decision-making of rural Chinese households with three alternatives: stay exclusively on farm, take local off-farm jobs, and migrate. Based on a survey of rural Chinese households, we extend the dynamic discrete choice model of Wooldridge (2002a,b) to a trichotomous setting and apply it to a five-year panel study. We observe statistically significant state dependence between the current period response and decisions of the previous time period. We also conclude that education, household size, and social networks play important roles in job-location decision-making of rural Chinese households.
Reorientation Transition in Single-Domain (Ga,Mn)As
Creators: name: Wang, K-Y.
name: Sawicki, M.
name: Edmonds, K. W.
name: Campion, R. P.
name: Maat, S.
name: Foxon, C. T.
name: Gallagher, B. L.
name: Dietl, T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate that the interplay of in-plane biaxial and uniaxial anisotropy fields in (Ga,Mn)As results in a magnetization reorientation transition and an anisotropic AC susceptibility which is fully consistent with a simple single domain model. The uniaxial and biaxial anisotropy constants vary respectively as the square and fourth power of the spontaneous magnetization across the whole temperature range up to T_C. The weakening of the anisotropy at the transition may be of technological importance for applications involving thermally-assisted magnetization switching.
description: 4 pages, 4 figures
TO ADOPT OR NOT TO ADOPT: CONSERVATION DECISIONS AND PARTICIPATION IN WATERSHED GROUPS
Creators: name: Hua, Wei
name: Zulauf, Carl R.
name: Sohngen, Brent
name: Hua, Wei
name: Zulauf, Carl R.
name: Sohngen, Brent
Publisher: name: Unknown
Year: 2004
Subjects: Farm Management

description: This paper explores how farm programs, watershed groups, and conservation decisions are related. In recent years, watershed groups have become a more important component of the decision process over the allocation of government subsidies focused on environmental improvements, and this research presents one of the first attempts to assess whether watershed groups have had an influence on landowner decisions. Three questions are addressed. First, we explore what factors influence landowner decisions to enter into government conservation programs. Second we consider factors that influence the adoption of conservation tillage. Third, we explore what factors influence farmer decisions to participate in watershed activities occurring near their farms. These questions are addressed with a survey of Ohio farmers conducted during the winter of 2004. The results indicate that watershed groups have had little influence on historically important programs like CRP and conservation tillage adoption, but that they seem to be having a more important influence in more recent programs and state and local programs. The results also indicate that conservation tillage decisions are mainly influenced by age, education, conservation compliance requirements, and attitudes. Surprisingly, owners appear less likely to engage in conservation tillage than renters.
description: Replaced with revised version of paper 07/21/04.
Approximating multi-dimensional Hamiltonian flows by billiards
Creators: name: Rapoport, A.
name: Rom-Kedar, V.
name: Turaev, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Consider a family of smooth potentials $V_ε$, which, in the limit $ε\to0$, become a singular hard-wall potential of a multi-dimensional billiard. We define auxiliary billiard domains that asymptote, as $ε\to0$ to the original billiard, and provide asymptotic expansion of the smooth Hamiltonian solution in terms of these billiard approximations. The asymptotic expansion includes error estimates in the $C^{r}$ norm and an iteration scheme for improving this approximation. Applying this theory to smooth potentials which limit to the multi-dimensional close to ellipsoidal billiards, we predict when the separatrix splitting persists for various types of potentials.
RISK, WEALTH AND SECTORAL CHOICE IN RURAL CREDIT MARKETS
Creators: name: Guirkinger, Catherine
name: Boucher, Stephen R.
name: Guirkinger, Catherine
name: Boucher, Stephen R.
Publisher: name: Unknown
Year: 2004
Subjects: International Development

description: We develop a model of sorting and matching between borrowers and lenders across formal and informal credit markets in a developing country context. We highlight the role of risk both on credit access and sectoral choice. We examine how activity and sectoral choice vary across agents with heterogeneous wealth endowments.
The Conformal Group Revisited
Creators: name: Pommaret, J. -F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 35Q60, 35Q75, 83C50

description: Since 100 years or so, it has been usually accepted that the " conformal group " could be defined in an arbitrary dimension n as the group of transformations preserving a non degenerate flat metric up to a nonzero invertible point depending factor called " conformal factor ". However, when n > 2, it is a finite dimensional Lie group of transformations with n translations, n(n-1)/2 rotations, 1 dilatation and n nonlinear transformations called " elations " , that is a total of (n+1)(n+2)/2 transformations. Because of the Michelson-Morley experiment, the conformal group of space-time with 15 parameters is well known as the biggest group of invariance of the constitutive law of electromagnetism (EM) in vacuum, even though the two sets of field and induction Maxwell equations are respectively invariant by any local invertible transformation. As this last generic number is also well defined and becomes equal to 3 for n=1 or 6 for n=2, the purpose of this paper is to use modern mathematical tools such as the Spencer operator on systems of OD or PD equations, both with its restriction to their symbols leading to the Spencer -cohomology, in order to provide a unique striking definition that could be valid for any n. The concept of a " finite type " system is crucial for such a new definition.
Analytical Investigation of Innovation Dynamics Considering Stochasticity in the Evaluation of Fitness
Creators: name: Helbing, Dirk
name: Treiber, Martin
name: Saam, Nicole J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate a selection-mutation model for the dynamics of technological innovation,a special case of reaction-diffusion equations. Although mutations are assumed to increase the variety of technologies, not their average success ("fitness"), they are an essential prerequisite for innovation. Together with a selection of above-average technologies due to imitation behavior, they are the "driving force" for the continuous increase in fitness. We will give analytical solutions for the probability distribution of technologies for special cases and in the limit of large times. The selection dynamics is modelled by a "proportional imitation" of better technologies. However, the assessment of a technology's fitness may be imperfect and, therefore, vary stochastically. We will derive conditions, under which wrong assessment of fitness can accelerate the innovation dynamics, as it has been found in some surprising numerical investigations.
description: For related work see http://www.helbing.org
On the $p$-fractional Schrödinger-Kirchhoff equations with electromagnetic fields and the Hardy-Littlewood-Sobolev nonlinearity
Creators: name: Zhao, Min
name: Song, Yueqiang
name: Repovš, Dušan D.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J10, 35B99, 35J60, 47G20

description: In this article, we deal with the following $p$-fractional Schrödinger-Kirchhoff equations with electromagnetic fields and the Hardy-Littlewood-Sobolev nonlinearity: $$ M\left([u]_{s,A}^{p}\right)(-Δ)_{p, A}^{s} u+V(x)|u|^{p-2} u=λ\left(\int_{\mathbb{R}^{N}} \frac{|u|^{p_{μ, s}^{*}}}{|x-y|^μ} \mathrm{d}y\right)|u|^{p_{μ, s}^{*}-2} u+k|u|^{q-2}u,\ x \in \mathbb{R}^{N},$$ where $0
Signatures of fractional Hall quasiparticles in moments of current through an antidot
Creators: name: Braggio, A.
name: Magnoli, N.
name: Merlo, M.
name: Sassetti, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The statistics of tunneling current in a fractional quantum Hall sample with an antidot is studied in the chiral Luttinger liquid picture of edge states. A comparison between Fano factor and skewness is proposed in order to clearly distinguish the charge of the carriers in both the thermal and the shot limit. In addition, we address effects on current moments of non-universal exponents in single-quasiparticle propagators. Positive correlations, result of propagators behaviour, are obtained in the shot noise limit of the Fano factor, and possible experimental consequences are outlined.
AN ANALYSIS OF THE FEASIBILITY OF IRRIGATION DISTRICT TRANSFER IN HONDURAS
Creators: name: Hearne, Robert R.
name: Martinez A., Carlos
name: Hearne, Robert R.
name: Martinez A., Carlos
Publisher: name: Unknown
Year: 2004
Subjects: Crop Production/Industries

description: User participation in the management of irrigation systems has been touted as a means to establish incentives for proper operation and management, decrease distortionary governmental subsidies, and increase water-use efficiency. The Government of Honduras has been in a process of rehabilitating and transferring management responsibility of the Flores irrigation districts to farmers. This paper presents a review of the transfer process, an analysis of farmers? capacity to accept financial responsibility for the systems, and an analysis of farmers? preferences towards the privatization process. The research intends to support the ongoing transfer process by identifying constraints and proposing improved strategies.
Three-Body Inertia Tensor
Creators: name: Ee, June-Haak
name: Jung, Dong-Won
name: Kim, U-Rae
name: Kim, Dohyun
name: Lee, Jungil
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We derive a general formula for the inertia tensor of a three-body system. By employing three independent Lagrange undetermined multipliers to express the vectors corresponding to the sides in terms of the position vectors of the vertices, we present the general covariant expression for the inertia tensor of the three particles of different masses. If $m_a/a=m_b/b=m_c/c=ρ$, then the center of mass coincides with the incenter of the triangle and the moment of inertia about the normal axis passing the center of mass is $I=ρabc$, where $m_a$, $m_b$, and $m_c$ are the masses of the particles at $A$, $B$, and $C$, respectively, and $a$, $b$, and $c$ are the lengths of the line segments $\overline{BC}$, $\overline{CA}$, and $\overline{AB}$, respectively. The derivation and the corresponding results are closely related to the famous Heron's formula for the area of a triangle.
description: 14 pages, 3 figures
Intuitive Control of Scraping and Rubbing Through Audio-tactile Synthesis
Creators: name: Aramaki, Mitsuko
name: Bernard, Corentin
name: Kronland-Martinet, Richard
name: Poirot, Samuel
name: Ystad, Sølvi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Classical Physics (physics.class-ph)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: Intuitive control of synthesis processes is an ongoing challenge within the domain of auditory perception and cognition. Previous works on sound modelling combined with psychophysical tests have enabled our team to develop a synthesizer that provides intuitive control of actions and objects based on semantic descriptions for sound sources. In this demo we present an augmented version of the synthesizer in which we added tactile stimulations to increase the sensation of true continuous friction interactions (rubbing and scratching) with the simulated objects. This is of interest for several reasons. Firstly, it enables to evaluate the realism of our sound model in presence of stimulations from other modalities. Secondly it enables to compare tactile and auditory signal structures linked to the same evocation, and thirdly it provides a tool to investigate multimodal perception and how stimulations from different modalities should be combined to provide realistic user interfaces.
OBESITY AND NUTRIENT CONSUMPTION: A RATIONAL ADDICTION?
Creators: name: Richards, Timothy J.
name: Patterson, Paul M.
name: Tegene, Abebayehu
name: Richards, Timothy J.
name: Patterson, Paul M.
name: Tegene, Abebayehu
Publisher: name: Unknown
Year: 2004
Subjects: Food Consumption/Nutrition/Food Safety

description: This study tests for a rational addiction to food nutrients as a potential explanation for the obesity epidemic. A random coefficients (mixed) logit model applied to household scanner data finds evidence of a strong, forward-looking addiction to carbohydrates. Consequently, price-based policies may be effective in controlling excessive nutrient intake.
Proper Motion of the Irradiated Jet HH 399 in the Trifid Nebula
Creators: name: Yusef-Zadeh, F.
name: Biretta, J.
name: Wardle, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: HH 399 is one of the first Herbig Haro flows recognized to be irradiated by the UV radiation of the massive O7.5 star in the Trifid nebula. We present the proper motion of the first irradiated jet based on two epochs of HST observations of HH 399 separated nearly by five years using H$α$ and [SII] line filters. High proper motion with continuous velocities between 200$\pm$55 and 528$\pm24$ \kms are detected in both lines along the 18$''$ extent of the jet axis. The irradiated fully-ionized jet consists of numerous knots along the jet but also shows the evidence for a number of isolated blob-like structures running immediately outside the jet with lower transverse velocities. The transverse velocities combined with radial velocity measurements indicate that the jet axis lies away from the plane of the sky by only few degrees. We argue that the jet is fully ionized based on [SII]/H$α$ line ratio as well as radio continuum emission detected from the full extent of the jet at 3.6cm wavelength. The stellar mass-loss rate producing HH 399 is estimated to be $\approx 2\times10^{-6} \msol $yr$^{-1}$.
description: 14 pages, 6 figures, ApJ (in press)
Klein, Laurentius / Meinhold, Peter, Über Wesen und Gestalt der Kirche
Creators: name: Geisser, Hans Friedrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 2 (1964): Ökumenische Rundschau, Band 13, Heft 2
Universal Analytic Gr{ö}bner Bases and Tropical Geometry
Creators: name: Vaccon, Tristan
name: Verron, Thibaut
Publisher: name: arXiv
Year: 2024
Subjects: subject: Symbolic Computation (cs.SC)
subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: A universal analytic Gr{ö}bner basis (UAGB) of an ideal of a Tate algebra is a set containing a local Gr{ö}bner basis for all suitable convergence radii. In a previous article, the authors proved the existence of finite UAGB's for polynomial ideals, leaving open the question of how to compute them. In this paper, we provide an algorithm computing a UAGB for a given polynomial ideal, by traversing the Gr{ö}bner fan of the ideal. As an application, it offers a new point of view on algorithms for computing tropical varieties of homogeneous polynomial ideals, which typically rely on lifting the computations to an algebra of power series. Motivated by effective computations in tropical analytic geometry, we also examine local bases for more general convergence conditions, constraining the radii to a convex polyhedron. In this setting, we provide an algorithm to compute local Gr{ö}bner bases and discuss obstacles towards proving the existence of finite UAGBs. CCS CONCEPTS $\bullet$ Computing methodologies $\rightarrow$ Algebraic algorithms.
Phase transition in the assignment problem for random matrices
Creators: name: Esteve, J. G.
name: Falceto, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Computational Complexity (cs.CC)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We report an analytic and numerical study of a phase transition in a P problem (the assignment problem) that separates two phases whose representatives are the simple matching problem (an easy P problem) and the traveling salesman problem (a NP-complete problem). Like other phase transitions found in combinatoric problems (K-satisfiability, number partitioning) this can help to understand the nature of the difficulties in solving NP problems an to find more accurate algorithms for them.
description: 7 pages, 5 figures; accepted for publication in Europhys. Lett. http://www.edpsciences.org/journal/index.cfm?edpsname=epl
Examining sources of gender DIF : a confirmatory approach
Creators: name: Barnett, Sharon
Publisher: name: University of British Columbia
Year: 2009

description: A confirmatory approach based on a multidimensional model (Douglas, Roussos, & Stout, 1996; Shealy & Stout, 1993; Stout & Roussos, 1995) was used to identify sources of differential item functioning (DIF) and differential bundle functioning (DBF) for boys and girls on the British Columbia Principles of Mathematics Exam for grade 12 (PME12). Data consisted of a total of 9404 examinees; 4335 girls and 5069 boys. There were 45 multiple choice items in the exam. Analyses were completed in two stages. In stage 1, patterns present in the gender DIF research in mathematics were identified. Stage 2 was the statistical confirmation of these patterns. Sources of gender DIF were confirmed for the content areas: polynomial, quadratic relations, logarithms and exponents. Items tapping higher cognitive levels dealing with patterns and relation, word problems, and items containing visuals were also confirmed as a source of DIF. Exploratory analyses indicated that computation items for which no equations are provided may be a source of DIF along with trigonometry items. This study contributes to an increased understanding of sources of gender DIF that may assist test developers to ensure that mathematics items measure the construct that they are intended to measure and that the test as a whole measures that which it purports to measure. The findings of this research provide an additional source of information about the differential performance of boys and girls that may be used to develop guidelines and test construction principles for reducing gender DIF in mathematics. This research also contributes to a greater understanding of gender differences in mathematics learning and achievement.
ASSESSING THE IMPACT OF INTELLECTUAL PROPERTY RIGHTS IN THE PLANT/SEED INDUSTRY
Creators: name: Foltz, Jeremy D.
name: Dhar, Tirtha Pratim
name: Foltz, Jeremy D.
name: Dhar, Tirtha Pratim
Publisher: name: Unknown
Year: 2004
Subjects: Research and Development/Tech Change/Emerging Technologies

description: We develop a theoretical model of strategic firm behavior in seeking property rights given multiple property regimes. Our model suggests probability of the loss of trade secrets and revelations through patent applications does play a significant role in the choice of property rights by plant firms.
Lifelogging As An Extreme Form of Personal Information Management -- What Lessons To Learn
Creators: name: Tran, Ly-Duyen
name: Gurrin, Cathal
name: Smeaton, Alan F.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Personal data includes the digital footprints that we leave behind as part of our everyday activities, both online and offline in the real world. It includes data we collect ourselves, such as from wearables, as well as the data collected by others about our online behaviour and activities. Sometimes we are able to use the personal data we ourselves collect, in order to examine some parts of our lives but for the most part, our personal data is leveraged by third parties including internet companies, for services like targeted advertising and recommendations. Lifelogging is a form of extreme personal data gathering and in this article we present an overview of the tools used to manage access to lifelogs as demonstrated at the most recent of the annual Lifelog Search Challenge benchmarking workshops. Here, experimental systems are showcased in live, real time information seeking tasks by real users. This overview of these systems' capabilities show the range of possibilities for accessing our own personal data which may, in time, become more easily available as consumer-level services.
Nuclear quantum optics with x-ray laser pulses
Creators: name: Buervenich, Thomas J.
name: Evers, Joerg
name: Keitel, Christoph H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The direct interaction of nuclei with super-intense laser fields is studied. We show that present and upcoming high-frequency laser facilities, especially together with a moderate acceleration of the target nuclei, do allow for resonant laser-nucleus interaction. These direct interactions may be utilized for the optical measurement of nuclear properties such as the transition frequency and the dipole moment, thus opening the field of nuclear quantum optics. As ultimate goal, one may hope that direct laser-nucleus interactions could become a versatile tool to enhance preparation, control and detection in nuclear physics.
description: 5 pages, 3 eps figures, revised version
Estimating Generalization under Distribution Shifts via Domain-Invariant Representations
Creators: name: Chuang, Ching-Yao
name: Torralba, Antonio
name: Jegelka, Stefanie
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: When machine learning models are deployed on a test distribution different from the training distribution, they can perform poorly, but overestimate their performance. In this work, we aim to better estimate a model's performance under distribution shift, without supervision. To do so, we use a set of domain-invariant predictors as a proxy for the unknown, true target labels. Since the error of the resulting risk estimate depends on the target risk of the proxy model, we study generalization of domain-invariant representations and show that the complexity of the latent representation has a significant influence on the target risk. Empirically, our approach (1) enables self-tuning of domain adaptation models, and (2) accurately estimates the target error of given models under distribution shift. Other applications include model selection, deciding early stopping and error detection.
description: arXiv admin note: text overlap with arXiv:1910.05804
Gravitational waves from a dust disk around a Schwarzschild black hole
Creators: name: Sotani, Hajime
name: Saijo, Motoyuki
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate gravitational waves from a dust disk around a Schwarzschild black hole to focus on whether we can extract any of its physical properties from a direct detection of gravitational waves. We adopt a black hole perturbation approach in a time domain, which is a satisfactory approximation to illustrate a dust disk in a supermassive black hole. We find that we can determine the radius of the disk by using the power spectrum of gravitational waves and that our method to extract the radius works for a disk of arbitrary density distribution. Therefore we believe a possibility exists for determining the radius of the disk from a direct observation of gravitational waves detected by the Laser Interferometer Space Antenna.
description: v1: 13 pages with 10 figures, revtex4.cls. Submitted to Physical Review D; v2: 13 pages with 12 figures, revtex4.cls. Physical Review D (2006) in press
TRADITIONAL USES OF INPUT-OUTPUT MODELS IN WATERSHED PROGRAMS PLANNED UNDER PRINCIPLES AND GUIDELINES
Creators: name: Sheets, Keith
name: Sheets, Keith
Publisher: name: Unknown
Year: 1998
Subjects: subject: Environmental Economics and Policy
subject: Research Methods/ Statistical Methods
subject: Resource /Energy Economics and Policy
subject: IMPLAN
subject: Input-Output
subject: watershed analysis
subject: water quality
subject: NRCS
subject: conservation
subject: regional analysis

description: This paper outlines the traditional uses of input-output (I/O) modeling in watershed programs planned under federal "Principles and Guidelines." Generally, the national economic development costs and benefits are analyzed, and the I/O model is used to track on regional economic development impacts. These regional impact estimates have little impact in project selection, but provide a selling tool to develop local support for project funding and implementation.
DISCUSSANT'S COMMENTS FOR AMERICAN AGRICULTURAL ECONOMICS ASSOCIATION ANNUAL MEETING, SELECTED PAPERS SESSION SP-3X, "INTERNATIONAL HUMAN RESOURCE ISSUES"
Creators: name: Miljkovic, Dragan
name: Miljkovic, Dragan
Publisher: name: Unknown
Year: 1998
Subjects: Labor and Human Capital

description: This session focuses on applications of various migration, family labor and labor market models in international settings. Papers include: Rural Labor Mobility in China: Net Flows and Trends, Bryan Lohmar and Scott Rozelle, University of California-Davis; Changbao Zhao, Research Center for Rural Economics, Beijing. Fertility Desires and Sample Selection Bias: The Case of Senegal, Diafuka Saila-Ngita, Boris Bravo-Ureta, and Rafael Perez-Escamilla, University of Connecticut. Intergenerational Succession in Israeli Family Farms Ayal Kimhi and Noga Nachlieli, Hebrew University. A Panel Data Approach to the Output-Inflation Tradeoff: A Review of the International Evidence, Harold Zavarce, Carolina Pagliacci, and Maria-Christina Espinoza, Texas A&M University.
MARKET EFFICIENCY IN AGRICULTURAL FUTURES MARKETS
Creators: name: McKenzie, Andrew M.
name: Holt, Matthew T.
name: McKenzie, Andrew M.
name: Holt, Matthew T.
Publisher: name: Unknown
Year: 1998
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper tests for both long run and short run market efficiency and unbiasedness in five agricultural futures markets. The possible existence of constant and time varying risk premia are taken into account using cointegration procedures and error correction models within a GARCH framework.
A Heterotic Standard Model
Creators: name: Braun, Volker
name: He, Yang-Hui
name: Ovrut, Burt A.
name: Pantev, Tony
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Within the context of the E_8 x E_8 heterotic superstring compactified on a smooth Calabi-Yau threefold with an SU(4) gauge instanton, we show the existence of simple, realistic N=1 supersymmetric vacua that are compatible with low energy particle physics. The observable sector of these vacua has gauge group SU(3)_C x SU(2)_L x U(1)_Y x U(1)_{B-L}, three families of quarks and leptons, each with an additional right-handed neutrino, two Higgs-Higgs conjugate pairs, a small number of uncharged moduli and no exotic matter. The hidden sector contains non-Abelian gauge fields and moduli. In the strong coupling case there is no exotic matter, whereas for weak coupling there are a small number of additional matter multiplets in the hidden sector. The construction exploits a mechanism for ``splitting'' multiplets. The minimal nature and rarity of these vacua suggest the possible theoretical and experimental relevance of spontaneously broken U(1)_{B-L} gauge symmetry and two Higgs-Higgs conjugate pairs. The U(1)_{B-L} symmetry helps to naturally suppress the rate of nucleon decay.
description: 11+1 pp, typos corrected
INVESTMENT EFFECTS OF ENDOGENOUS AND EXOGENOUS DEPRECIATION: IMPROVED PASTURES IN URUGUAY
Creators: name: Ekboir, Javier M.
name: Jarvis, Lovell S.
name: Rey, Carlos
name: Ekboir, Javier M.
name: Jarvis, Lovell S.
name: Rey, Carlos
Publisher: name: Unknown
Year: 1998
Subjects: Land Economics/Use

description: The depreciation rate for capital assets may have endogenous and exogenous components. Change in the exogenous component depends on technological change and/or environmental factors, shifts the production function, and independently affects profitability and investment. Change in the endogenous component does not. These hypotheses are tested using data on Uruguayan grass-legume pastures.
The Kondo effect in bosonic spin liquids
Creators: name: Florens, Serge
name: Fritz, Lars
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In a metal, a magnetic impurity is fully screened by the conduction electrons at low temperature. In contrast, impurity moments coupled to spin-1 bulk bosons, such as triplet excitations in paramagnets, are only partially screened, even at the bulk quantum critical point. We argue that this difference is not due to the quantum statistics of the host particles but instead related to the structure of the impurity-host coupling, by demonstrating that frustrated magnets with bosonic spinon excitations can display a bosonic version of the Kondo effect. However, the Bose statistics of the bulk implies distinct behavior, such as a weak-coupling impurity quantum phase transition, and perfect screening for a range of impurity spin values. We discuss implications of our results for the compound Cs2CuCl4, as well as possible extensions to multicomponent bosonic gases.
description: 4 pages, 3 figures. The weak coupling RG flow was corrected and expanded in last version
AN INTRASEASONAL BIOECONOMIC MODEL OF PLRV NET NECROSIS
Creators: name: Marsh, Thomas L.
name: Huffaker, Ray G.
name: Folwell, Raymond J.
name: Long, Gary
name: Marsh, Thomas L.
name: Huffaker, Ray G.
name: Folwell, Raymond J.
name: Long, Gary
Publisher: name: Unknown
Year: 1998
Subjects: Crop Production/Industries
Environmental Economics and Policy

description: A bioeconomic model is developed as an IPM planning tool to combat PLRV net necrosis in the PNW potato industry. Environmental/biological and production processes are linked to marketing activities using discrete time control. We find that pesticides can be optimally timed to reduce applications and still protect against net necrosis.
EFFICIENCY, PRODUCTIVITY AND OUTPUT GROWTH: AN INTER-REGIONAL ANALYSIS OF GREEK AGRICULTURE
Creators: name: Tzouvelekas, Vangelis
name: Giannakas, Konstantinos
name: Karagiannis, Giannis
name: Tzouvelekas, Vangelis
name: Giannakas, Konstantinos
name: Karagiannis, Giannis
Publisher: name: Unknown
Year: 1998
Subjects: Crop Production/Industries
Industrial Organization

description: Output growth decomposition of the Greek olive-oil sector under technical and allocative inefficiencies, economies of scale and technical change, is performed. The stochastic production frontier model is extended to panel data and FGLS estimation. Conventional inputs are main source of growth: TFP increased in slow rate during the study period.
SOME IMPLICATIONS OF THE TWO-CONSTRAINT JOINT RECREATIONAL CHOICE DEMAND MODEL
Creators: name: Lew, Daniel K.
name: Lew, Daniel K.
Publisher: name: Unknown
Year: 1998
Subjects: Resource /Energy Economics and Policy

description: This paper explores the implications of applying a two-constraint joint recreational demand framework to estimate the demand for recreation at an Alaskan sportfishery. The demand for total days on-site and total trips per season are jointly estimated and used to parametrically define average on-site time and obtain consumer's surplus values.
A semi-analytical energy response model for low-energy events in JUNO
Creators: name: Kampmann, Philipp
name: Cheng, Yaping
name: Ludhova, Livia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The Jiangmen Underground Neutrino Observatory (JUNO) is a next-generation neutrino experiment under construction in China expected to be completed in 2022. As the main goal it aims to determine the neutrino mass ordering with 3-4 $σ$ significance using a 20 kton liquid scintillator detector. It will measure the oscillated energy spectrum of electron anti-neutrinos from two nuclear power plants at about 53 km baseline with an unprecedented energy resolution of 3% at 1 MeV. A requirement of the JUNO experiment is the knowledge of the energy non-linearity of the detector with a sub-percent precision. As the light yield of the liquid scintillator is not fully linear to the energy of the detected particle and dependent on the particle type, a model for this light yield is presented in this paper. Based on an energy non-linearity model of electrons, this article provides the conversion to the more complex energy response of positrons and gammas. This conversion uses a fast and simple algorithm to calculate the spectrum of secondary electrons generated by a gamma, which is introduced here and made open access to potential users. It is also discussed how the positron non-linearity can be obtained from the detector calibration with gamma sources using the results presented in this article.
description: 19 pages and 12 figures, submitted to Journal of Instrumentation
ANALYSIS OF THE EFFECTS OF ENVIRONMENTAL REGULATION ON PULP AND PAPER INDUSTRY STRUCTURE
Creators: name: Gomez, Irma A.
name: Love, H. Alan
name: Burton, Diana M.
name: Gomez, Irma A.
name: Love, H. Alan
name: Burton, Diana M.
Publisher: name: Unknown
Year: 1998
Subjects: Environmental Economics and Policy
Research Methods/ Statistical Methods

description: Environmental regulations are hypothesized to have an impact on industry structure in manufacturing industries. A nonstationary Markov chain analysis shows that the capital expenditures required to meet environmental regulations is a statistically significant variable explaining increasing concentration of production capacity in the pulp and paper industry.
DISCUSSANT'S COMMENTS FOR AMERICAN AGRICULTURAL ECONOMICS ASSOCIATION ANNUAL MEETING, SELECTED PAPERS SESSION SP-10R, "TRADE AND MACRO POLICY IN AGRICULTURAL DEVELOPMENT"
Creators: name: Devadoss, Stephen
name: Devadoss, Stephen
Publisher: name: Unknown
Year: 1998
Subjects: Agricultural and Food Policy
International Relations/Trade

description: The implications of markets, government policies and macroeconomic events,on the agricultural sector are discussed in these papers. The Implications of an Export Tax on Sectoral Growth: A Case in Pakistan Darren Hudson, Mississippi State University and Don Ethridge, Texas Tech University. Economic Boom, Financial Bust, and the Fate of Thai Agriculture: Was Growth in the 1990s Too Fast? Ian Coxhead, University of Wisconsin-Madison. Bringing Spatial Relationships Back in to Market Integration Studies: A Multivariate Approach for the Brazilian Rice Market Gloria Gonzalez-Rivera and Steven Helfand. A Dynamic Model of the Food Processing Sector in the New Market Economies of Central Europe Robert Lyons, Rachael Goodhue, Gordon Rausser, and Leo Simon, University of California-Berkeley. Trade Implications of Timber Certification in the European Union Jennifer Stevens and Marinas Tsigas.
Recensão a The Militant Middle Ages. Contemporary Politics between New Barbarians and Mod- ern Crusaders, de Tommaso di Carpegna Falconieri
Creators: name: Martins, Pedro
Publisher: name: Práticas da História. Journal on Theory, Historiography and Uses of the Past
Year: 2021

description: Não se aplica.
description: Práticas da História. Journal on Theory, Historiography and Uses of the Past, No. 10 (2020)
EXPANDING THE NATIONAL FLOOD INSURANCE PROGRAM TO COVER COASTAL EROSION DAMAGE
Creators: name: Keeler, Andrew G.
name: Kriesel, Warren
name: Landry, Craig E.
name: Keeler, Andrew G.
name: Kriesel, Warren
name: Landry, Craig E.
Publisher: name: Unknown
Year: 2000
Subjects: Land Economics/Use
Risk and Uncertainty

description: The National Flood Insurance Program does not currently cover damage strictly attributable to coastal erosion. This paper uses the results of a nationwide survey of coastal property owners to estimate the demand for such insurance. We find that there is significant demand at prices in the range of current flood insurance premiums. Demand is influenced in the hypothesized way by increased measures of erosion risk as well as by insurance price and income.
Coplanar waveguide ground potentials imbalance as a source of useful signal in Near-Field Scanning Microwave Microscopy
Creators: name: Gladilovich, P. A.
name: Sabluk, A. V.
name: Burtsev, P. S.
name: Migdisov, R.
name: Maleeva, N.
name: Shitov, S. V.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Various techniques are available in order to obtain information on samples of a different nature in near-field scanning microwave microscopy (NSMM), with transmission-line resonator (TLR) techniques considered as the most advanced in terms of sensitivity and resolution. In this paper, we focus on development of a TLR-based NSMM supplied by a new source of useful signal: coplanar waveguide ground potentials imbalance. Electromagnetic modeling of the device and experimental scanning of two planar structures are conducted to examine the performance of the proposed technique. Both modeling and experimental results demonstrate the ability to distinguish symmetric inhomogeneity positions with respect to the central conductor of the coplanar waveguide by the phase of imbalance signal. The thin-film structure scanning procedure displays the possibility of proposed approach to resolve low-contrast structures with accuracy up to 98.7 %.
description: 7 pages, 4 figures
MEASUREMENT AND EXPLANATION OF TECHNICAL EFFICIENCY IN MISSOURI HOG PRODUCTION
Creators: name: Ben-Belhassen, Boubaker
name: Womack, Abner W.
name: Ben-Belhassen, Boubaker
name: Womack, Abner W.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Industrial Organization
subject: Livestock Production/Industries
subject: Productivity Analysis
subject: technical efficiency
subject: economies of scale
subject: production frontier
subject: econometric methods

description: The U.S. live hog production has undergone a significant structural change characterized by a trend toward larger operations. Experts argue that there is a cost advantage for larger farms due to industrialization and increased management intensity. One important element in production, mainly for industries with rapid consolidation, is technical efficiency which affects the firm's competitive position directly. This study uses a stochastic production frontier function and farm-level data to measure and explain technical efficiency in Missouri hog production. The study estimates the mean technical efficiency for farms in the sample at about 82 percent, implying that a large proportion of production (18%) is lost due to farm-specific inefficiencies. Further, the results of the technical efficiency model proves the effects of technology and managerial skills on the level of productive efficiency. The study also finds economies of scale in hog production, thus explaining the consolidation in the industry.
Maximal and linearly inextensible polynomials
Creators: name: Borcea, Julius
Publisher: name: arXiv
Year: 2006
Subjects: subject: Complex Variables (math.CV)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: Primary: 30C15; Secondary: 30C10, 26C10, 12D10

description: Let S(n,0) be the set of monic complex polynomials of degree $n\ge 2$ having all their zeros in the closed unit disk and vanishing at 0. For $p\in S(n,0)$ denote by $|p|_{0}$ the distance from the origin to the zero set of $p'$. We determine all 0-maximal polynomials of degree $n$, that is, all polynomials $p\in S(n,0)$ such that $|p|_{0}\ge |q|_{0}$ for any $q\in S(n,0)$. Using a second order variational method we then show that although some of these polynomials are linearly inextensible, they are not locally maximal for Sendov's conjecture.
description: Final version, to appear in Mathematica Scandinavica, 16 pages, no figures, LaTeX2e
On the representation and methodology for wide and short range head pose estimation
Creators: name: Cobo, Alejandro
name: Valle, Roberto
name: Buenaposada, José M.
name: Baumela, Luis
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Head pose estimation (HPE) is a problem of interest in computer vision to improve the performance of face processing tasks in semi-frontal or profile settings. Recent applications require the analysis of faces in the full 360° rotation range. Traditional approaches to solve the semi-frontal and profile cases are not directly amenable for the full rotation case. In this paper we analyze the methodology for short- and wide-range HPE and discuss which representations and metrics are adequate for each case. We show that the popular Euler angles representation is a good choice for short-range HPE, but not at extreme rotations. However, the Euler angles' gimbal lock problem prevents them from being used as a valid metric in any setting. We also revisit the current cross-data set evaluation methodology and note that the lack of alignment between the reference systems of the training and test data sets negatively biases the results of all articles in the literature. We introduce a procedure to quantify this misalignment and a new methodology for cross-data set HPE that establishes new, more accurate, SOTA for the 300W-LP|Biwi benchmark. We also propose a generalization of the geodesic angular distance metric that enables the construction of a loss that controls the contribution of each training sample to the optimization of the model. Finally, we introduce a wide range HPE benchmark based on the CMU Panoptic data set.
Two comments on adhesion
Creators: name: Tiwari, A.
name: Wang, J.
name: Persson, B. N. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The adhesion paradox refers to the observation that for most solid objects no adhesion can be detected when they are separated from a state of molecular contact. The adhesion paradox results from surface roughness, and we present experimental and theoretical results which shows that adhesion in most cases is "killed" by the longest wavelength roughness. Adhesion experiments between a human finger and a clean glass plate were carried out, and for a dry finger, no macroscopic adhesion occurred. We suggest that the observed decrease in the contact area with increasing shear force results from non-adhesive finger-glass contact mechanics, involving large deformations of a complex layered material.
description: 6 Pages, 9 figures. arXiv admin note: text overlap with arXiv:2002.02226
History, Activism and the Environment An interview with Vinita Damodaran by Bárbara Direito and José Miguel Ferreira
Creators: name: Direito, Bárbara
name: Ferreira, José Miguel
Publisher: name: Práticas da História. Journal on Theory, Historiography and Uses of the Past
Year: 2021

description: Não se aplica.
description: Práticas da História. Journal on Theory, Historiography and Uses of the Past, No. 10 (2020)
Do ultramar ao pós-colonial. Reflexões de um historiador sobre Moçambique contemporâneo nos arquivos de Portugal e Moçambique
Creators: name: Cahen, Michel
Publisher: name: Práticas da História. Journal on Theory, Historiography and Uses of the Past
Year: 2021

description: Não se aplica.
description: Práticas da História. Journal on Theory, Historiography and Uses of the Past, No. 10 (2020)
The Interaction of Working and Speculative Commodity Stocks
Creators: name: Carter, Colin A.
name: Revoredo-Giha, Cesar
name: Carter, Colin A.
name: Revoredo-Giha, Cesar
Publisher: name: Unknown
Year: 2000
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This paper models the interaction of working (also called pipeline) and speculative commodity stocks. We model working inventories (i.e., raw material inventories carried by processors) based on Ramey's (1989) model of inventories as factors of production, which allows us to represent storage under inter-temporal price backwardation, observed in commodity markets. We incorporate both speculative and working stocks in a simple model to analyze the interaction and to simulate the relationship between inter-temporal commodity price spreads and stocks. Our model replicates common price patters found in commodity markets.
FINITE SAMPLE PROPERTIES OF NONSTATIONARY BINARY RESPONSE MODELS: A MONTE CARLO AND RESPONSE SURFACE ANALYSIS
Creators: name: Riddel, Mary C.
name: Riddel, Mary C.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Research Methods/ Statistical Methods
subject: Binary choice
subject: Probit models
subject: Nonstationay processes

description: This paper investigates the finite sample distributions of maximum likelihood estimators for nonstationary probit models. We find that, analogous to standard OLS models, commonly used tests statistics almost always reject the null hypothesis of no relationship between xt and a latent yt, even when they are, in fact, generated by independent random walks. However, if cointegrating relationships are present in the model, parameter distributions are better behaved and standard z and Wald test statistics are consistent.
FORWARD MARKETING BEHAVIOR OF SOYBEAN PRODUCERS
Creators: name: Davis, Todd D.
name: Patrick, George F.
name: Davis, Todd D.
name: Patrick, George F.
Publisher: name: Unknown
Year: 2000
Subjects: subject: Demand and Price Analysis
subject: Marketing
subject: FOS: Economics and business

description: Indiana, Mississippi, and Nebraska producers' forward pricing behavior was analyzed with Tobit models. Percent debt, percent soybean acres, risk aversion, market consultants, comfort level with futures and options, lenders' opinions, written marketing plans, crop insurance, and geographic location were significant in explaining the percentage of expected soybean production forward priced.