cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A CLASS OF SEPARABILITY FLEXIBLE FUNCTIONAL FORMS
Creators: name: Driscoll, Paul J.
name: McGuirk, Anya M.
name: Driscoll, Paul J.
name: McGuirk, Anya M.
Publisher: name: Unknown
Year: 1992
Subjects: Research Methods/ Statistical Methods

description: Quadratic flexible forms, such as the translog and generalized Leontief, are separability inflexible. That is, separability restrictions render them inflexible with regard to separable structures. A class functional forms is proposed that is flexible with regard to general production structures and remains flexible regarding weakly separable structures when separability restrictions are imposed, thus permitting tests of the separability hypothesis. Additionally, the restricted forms are parsimonious; that is they contain the minimum number of parameters with which flexibility can be achieved.
Two-field Models of Dark Energy with Equation of State Across -1
Creators: name: Zhang, Xiao-fei
name: Li, Hong
name: Piao, Yun-Song
name: Zhang, Xinmin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the possibility of building two-field models of dark energy with equation of state across -1. Specifically we will consider two classes of models: one consists of two scalar fields (Quintessence+Phantom) and another includes one scalar (Phantom) and one spinor field (Neutrino). Our studies indicate to some extent that two-field models give rise to a simple realization of the dynamical dark energy model with the equation of state across $w = -1$.
description: 5 pages, 4 figures Revtex4
Retardation of Particle Evaporation from Excited Nuclear Systems Due to Thermal Expansion
Creators: name: Tõke, J.
name: Pieńkowski, L.
name: Houck, M.
name: Schröder, W. U.
name: Sobotka, L. G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Particle evaporation rates from excited nuclear systems at equilibrium matter density are studied within the Harmonic-Interaction Fermi Gas Model (HIFGM) combined with Weisskopf's detailed balance approach. It is found that thermal expansion of a hot nucleus, as described quantitatively by HIFGM, leads to a significant retardation of particle emission, greatly extending the validity of Weisskopf's approach. The decay of such highly excited nuclei is strongly influenced by surface instabilities.
CERTIFICATION AND SUPPLY RESPONSE IN THE ORGANIC LETTUCE MARKET
Creators: name: Lohr, Luanne
name: Park, Timothy A.
name: Lohr, Luanne
name: Park, Timothy A.
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Industrial Organization

description: The impact of supply relationships and certification programs on the organic lettuce market is examined using an integrated partial adjustment and asymmetric supply response model. Costs associated with organic certification, production, and marketing have not restricted producers' abilities to respond to price signals. Organic growers allocate output between certified and noncertified markets in response to changing price premiums. Estimates of short-run supply elasticities indicate that organic lettuce growers are more responsive to price changes than producers of nonorganic lettuce. Long-run elasticity has increased since 1988, a change that coincides with the market entry of larger producers.
Transport in Two Dimensional Electronic Micro-emulsions
Creators: name: Spivak, B.
name: Kivelson, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In two dimensional electron systems with Coulomb or dipolar interactions, a direct transition, whether first or second order, from a liquid to a crystalline state is forbidden. As a result, between these phases there must be other (microemulsion) phases which can be viewed as a meso-scale mixture of the liquid and crystalline phases. We investigate the transport properties of these new electronic phases and present arguments that they are responsible for the various transport anomalies that have been seen in experiments on the strongly correlated 2DEG in high mobility semiconductor devices with low electron densities.
THE VALUE OF REDUCING TEMPORAL INPUT NONUNIFORMITIES
Creators: name: Babcock, Bruce A.
name: Blackmer, Alfred M.
name: Babcock, Bruce A.
name: Blackmer, Alfred M.
Publisher: name: Unknown
Year: 1992
Subjects: Crop Production/Industries
Risk and Uncertainty

description: The producer value of reducing temporal uncertainty concerning the level of soil nitrate is estimated for corn production in Iowa. The reduction in uncertainty is obtained through use of a late-spring nitrate test. Parametric representations of conditional densities of soil nitrates are used along with an estimated production function to estimate optimal nitrogen fertilizer applications under both uncertainty and certainty for a representative risk-neutral Iowa corn farm. Results indicate that decreasing uncertainty could reduce average fertilizer applications by up to 38% and that producer returns could be increased by up to $22.08/acre.
OPTIMAL RISK MANAGEMENT, RISK AVERSION, AND PRODUCTION FUNCTION PROPERTIES
Creators: name: Loehman, Edna T.
name: Nelson, Carl H.
name: Loehman, Edna T.
name: Nelson, Carl H.
Publisher: name: Unknown
Year: 1992
Subjects: Production Economics
Risk and Uncertainty

description: For production risk with identified physical causes, the nature of risk, production characteristics, risk preference, and prices determine optimal input use. Here, a two-way classification for pairs of inputs - each input as being risk increasing or decreasing and pairs as being risk substitutes or complements - provides sufficient conditions to determine how risk aversion should affect input use. Unlike the Sandmo price risk averse firm may produce more expected output and use more inputs than a risk neutral firm. Sufficient conditions to determine types for pairs of inputs are also related to properties of the production function.
Phase diagram of Bose-Fermi mixtures in one-dimensional optical lattices
Creators: name: Pollet, Lode
name: Troyer, Matthias
name: Van Houcke, Kris
name: Rombouts, Stefan M. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The ground state phase diagram of the one-dimensional Bose-Fermi Hubbard model is studied in the canonical ensemble using a quantum Monte Carlo method. We focus on the case where both species have half filling in order to maximize the pairing correlations between the bosons and the fermions. In case of equal hopping we distinguish between phase separation, a Luttinger liquid phase and a phase characterized by strong singlet pairing between the species. True long-range density waves exist with unequal hopping amplitudes.
description: 5 pages, 5 figures, replaced with published version
Energy stored on a cosmological horizon and its thermodynamic fluctuations in holographic equipartition law
Creators: name: Komatsu, Nobuyoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Our Universe is expected to finally approach a de Sitter universe whose horizon is considered to be in thermal equilibrium. In the present article, both the energy stored on the horizon and its thermodynamic fluctuations are examined through the holographic equipartition law. First, it is confirmed that a flat Friedmann--Robertson--Walker universe approaches a de Sitter universe, using a cosmological model close to lambda cold dark matter ($Λ$CDM) models. Then, based on the holographic equipartition law, the energy density of the Hubble volume is calculated from the energy on the Hubble horizon of a de Sitter universe. The energy density for a de Sitter universe is constant and the order of the energy density is consistent with the order of that for the observed cosmological constant. Second, thermodynamic fluctuations of energy on the horizon are examined, assuming stable fluctuations around thermal equilibrium states. A standard formulation of the fluctuations for a canonical ensemble is applied to the Hubble horizon of a de Sitter universe. The thermodynamic fluctuations of the energy are found to be a universal constant corresponding to the Planck energy, regardless of the Hubble parameter. In contrast, the relative fluctuations of the energy can be characterized by the ratio of the one-degree-of-freedom energy to the Planck energy. At the present time, the order of the relative fluctuations should be within the range of a discrepancy derived from a discussion of the cosmological constant problem, namely a range approximately from $10^{-60}$ to $10^{-123}$. The present results may imply that the energy stored on the Hubble horizon is related to a kind of effective dark energy, whereas the energy that can be `maximally' stored on the horizon may behave as if it were a kind of effective vacuum-like energy in an extended holographic equipartition law.
description: Final version accepted for publication in PRD. Typos are corrected and references are updated. [12 pages, 1 figure]
Uniqueness of tangent cones for calibrated 2-cycles
Creators: name: Pumberger, David
name: Riviere, Tristan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 49Q15; 35J60; 53C38

description: We prove that tangent cones to 2-dimensional calibrated cycles are unique. Using this result we prove a rate of convergence for the mass of the blow-up of a calibrated integral 2-cycle towards the limiting density. With the same techniques, we can also prove such a rate for J-holomorphic maps between almost complex manifolds and deduce the uniqueness of their tangent maps.
description: 37 pages
Massive photons and electrically charged black holes
Creators: name: Dolgov, A. D.
name: Gudkova, K. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The characteristic time of disappearance of electric field in massive electrodynamics during the capture of electric charge by black holes is calculated. It is shown that this time does not depend upon the photon mass. The electric field at large distances disappears with the speed of light.
Discovering the Sky at the Longest wavelengths with a lunar orbit array
Creators: name: Chen, Xuelei
name: Yan, Jingye
name: Deng, Li
name: Wu, Fengquan
name: Wu, Lin
name: Xu, Yidong
name: Zhou, Li
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Due to ionosphere absorption and the interference by natural and artificial radio emissions, astronomical observation from the ground becomes very difficult at the wavelengths of decametre or longer, which we shall refer as the ultralong wavelengths. This unexplored part of electromagnetic spectrum has the potential of great discoveries, notably in the study of cosmic dark ages and dawn, but also in heliophysics and space weather, planets and exoplanets, cosmic ray and neutrinos, pulsar and interstellar medium (ISM), extragalactic radio sources, and so on. The difficulty of the ionosphere can be overcome by space observation, and the Moon can shield the radio frequency interferences (RFIs) from the Earth. A lunar orbit array can be a practical first step of opening up the ultralong wave band. Compared with a lunar surface observatory on the far side, the lunar orbit array is simpler and more economical, as it does not need to make the risky and expensive landing, can be easily powered with solar energy, and the data can be transmitted back to the Earth when it is on the near-side part of the orbit. Here I describe the Discovering Sky at the Longest wavelength (DSL) project, which will consist of a mother satellite and 6~9 daughter satellites, flying on the same circular orbit around the Moon, and forming a linear interferometer array. The data are collected by the mother satellite which computes the interferometric cross-correlations (visibilities) and transmits the data back to the Earth. The whole array can be deployed on the lunar orbit with a single rocket launch. The project is under intensive study in China.
description: to be published in 'Astronomy from the Moon: the next decades' theme issue of Philosophical Transactions A
Classical Statistics Inherent in a Quantum Density Matrix
Creators: name: Rajagopal, A. K.
name: Rendell, R. W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A density matrix formulation of classical bipartite correlations is constructed. This leads to an understanding of the appearance of classical statistical correlations intertwined with the quantum correlations as well as a physical underpinning of these correlations. As a byproduct of this analysis, a physical basis of the classical statistical correlations leading to additive entropy in a bipartite system discussed recently by Tsallis et al emerges as inherent classical spin fluctuations. It is found that in this example, the quantum correlations shrink the region of additivity in phase space.
description: 10 pages, 3 figures
Microcanonical characterization of first-order phase transitions in a generalized model for aggregation
Creators: name: Trugilho, L. F.
name: Rizzi, L. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Aggregation transitions in disordered mesoscopic systems play an important role in several areas of knowledge, from materials science to biology. The lack of a thermodynamic limit in systems that are intrinsically finite makes the microcanonical thermostatistics analysis, which is based on the microcanonical entropy, a suitable alternative to study the aggregation phenomena. Although microcanonical entropies have been used in the characterization of first-order phase transitions in many non-additive systems, most of the studies are only done numerically with aid of advanced Monte Carlo simulations. Here we consider a semi-analytical approach to characterize aggregation transitions that occur in a generalized model related to the model introduced by Thirring. By considering an effective interaction energy between the particles in the aggregate, our approach allowed us to obtain scaling relations not only for the microcanonical entropies and temperatures, but also for the sizes of the aggregates and free-energy profiles. In addition, we test the approach commonly used in simulations which is based on the conformational microcanonical entropy determined from a density of states that is a function of the potential energy only. Besides the evaluation of temperature versus concentration phase diagrams, we explore this generalized model to illustrate how one can use the microcanonical thermostatistics as an analysis method to determine experimentally relevant quantities such as latent heats and free-energy barriers of aggregation transitions.
description: 25 pages, 6 figures
Bregadze, T'.; K'avt'aria; K'ut'at'eladze: Katalog der georgischen Handschriften des ehemaligen Kirchlichen Museums
Creators: name: Assfalg, Julius
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 60 (1976): Oriens christianus, Band 60
Theoretical modeling of small-scale domain switching and fracture of ferroelectric materials
Creators: name: Zeng, Xianwei
Publisher: name: University of British Columbia
Year: 2009

description: The intrinsic electromechanical properties and quick response to external excitations make ferroelectrics an ideal material for fabrication of sensors, actuators and adaptive (smart) structures. Ferroelectrics have been increasingly employed beyond the linear regime as characterized by linear piezoelectricity. Electric fields and forces required to achieve large actuation result in mechanical and electrical degradation. Understanding of coupled electromechanical behavior and fracture mechanics of ferroelectrics is very important to the reliability and efficient design of devices made out of them. Some problems related to fracture mechanics of ferroelectrics are investigated theoretically in this thesis. A unique feature of ferroelectrics is their ability to rotate the direction of spontaneous polarization (i.e. domain switching) by 180° or non-1800, when subjected to a large electric field or stress. Domain switching is the major source of material non-linearity and has a significant influence on crack-tip electroelastic field. By examining the change of free energy before and after switching of an elliptic crystallite in a poled ferroelectric, a domain switching criterion which predicts the critical loading to trigger polarization switching is proposed for ferroelectric materials. This new criterion considers the interaction of the applied field with the switching strains and polarization and the change of electroelastic properties of the switched domain. A theoretical model similar to transformation toughening of zirconia-containing ceramics is proposed to investigate the effects of small-scale domain switching at a crack tip on crack tip field intensity factors. The new domain-switching criterion is used to predict the switching zone around a crack tip. A fundamental solution for a crack interacting with stress-free transformation strains and electric field-free polarization is obtained by using the Leknitskii's formalism. A Reuss-type approximation is proposed to model polycrystalline ferroelectrics. The influence of electromechanical loading and polar direction on apparent fracture toughness is numerically investigated for insulating and conducting cracks and qualitatively compared with available experiments. The theoretical models are extended to analyze the electroelastic field at the tip of a closed insulating (or conducting) crack or an embedded electrode. The effect of domain switching on the near-tip field is examined. The tensile stress ahead of a closed crack tip may lead to crack growth, while the intensified stress at an electrode-ceramic interface may lead to segmentation cracks and electrode delamination as observed in experimental studies of multi-layer stack actuators.
DYNAMICS AND PRICE VOLATILITY IN FARM-RETAIL LIVESTOCK PRICE RELATIONSHIPS
Creators: name: Kesavan, T.
name: Aradhyula, Satheesh V.
name: Johnson, Stanley R.
name: Kesavan, T.
name: Aradhyula, Satheesh V.
name: Johnson, Stanley R.
Publisher: name: Unknown
Year: 1992
Subjects: Demand and Price Analysis
Livestock Production/Industries

description: This study uses an error correction model (ECM) to investigate dynamics in farm-retail price relationships. The ECM is a more general method of incorporating dynamics and the long-run, steady-state relationships between farm and retail prices than has been used to data. Monthly data for beef and pork are used to test the time-series properties for the ECM specification. The model is extended to study price volatility through the generalized autoregressive conditional heteroskedasticity (GARCH) process. Accommodation of the GARCH process provides a useful way of analyzing both mean and variance effects of policy or market structure changes.
A LINEAR INVERSE DEMAND SYSTEM
Creators: name: Moschini, GianCarlo
name: Vissa, Anuradha
name: Moschini, GianCarlo
name: Vissa, Anuradha
Publisher: name: Unknown
Year: 1992
Subjects: Demand and Price Analysis

description: We present an inverse demand that can be estimated in a linear form. The model is derived from a specification of the distance function which is parametrically similar to the cost function underlying the Almost Ideal Demand System. Simulation results suggest that this linear inverse demand system has good approximation properties.
ON THE ESTIMATION OF SEPARABLE DEMAND MODELS
Creators: name: Edgerton, David L.
name: Edgerton, David L.
Publisher: name: Unknown
Year: 1993
Subjects: Demand and Price Analysis

description: Alternative stochastic specification of conditional demand models are considered. The results of LaFrance concerning the inconsistency of least squares are supported, but the class of models that allow standard instrumental variable estimation is broadened considerably.
MONETARY IMPACTS ON PRICES IN THE SHORT AND LONG RUN: FURTHER RESULTS FOR THE UNITED STATES
Creators: name: Choe, Young Chan
name: Koo, Won W.
name: Choe, Young Chan
name: Koo, Won W.
Publisher: name: Unknown
Year: 1993
Subjects: Demand and Price Analysis

description: This study examines the long-run neutrality of money and the short-run dynamics of farm and nonfarm prices to the monetary shock, using Johansen's approach. Results find a long-run equality of prices, but not neutrality. In the short-run, farm prices adjust faster than nonfarm prices to a monetary shock.
Fast Estimation of Sparse Quantum Noise
Creators: name: Harper, Robin
name: Yu, Wenjun
name: Flammia, Steven T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As quantum computers approach the fault tolerance threshold, diagnosing and characterizing the noise on large scale quantum devices is increasingly important. One of the most important classes of noise channels is the class of Pauli channels, for reasons of both theoretical tractability and experimental relevance. Here we present a practical algorithm for estimating the $s$ nonzero Pauli error rates in an $s$-sparse, $n$-qubit Pauli noise channel, or more generally the $s$ largest Pauli error rates. The algorithm comes with rigorous recovery guarantees and uses only $O(n^2)$ measurements, $O(s n^2)$ classical processing time, and Clifford quantum circuits. We experimentally validate a heuristic version of the algorithm that uses simplified Clifford circuits on data from an IBM 14-qubit superconducting device and our open source implementation. These data show that accurate and precise estimation of the probability of arbitrary-weight Pauli errors is possible even when the signal is two orders of magnitude below the measurement noise floor.
description: 25 pages, 3 figures. Open source implementation available at https://github.com/rharper2/sparsePauliReconstruction. Minor edits and format changes
QUANTIFYING THE EFFECTS OF NEW PRODUCT DEVELOPMENT: THE CASE OF LOW-FAT GROUND BEEF
Creators: name: Brester, Gary W.
name: Lhermite, Pascale
name: Goodwin, Barry K.
name: Hunt, Melvin C.
name: Brester, Gary W.
name: Lhermite, Pascale
name: Goodwin, Barry K.
name: Hunt, Melvin C.
Publisher: name: Unknown
Year: 1993
Subjects: Agribusiness

description: Low-fat ground beef (LFGB) is a new product designed to be as palatable as beef products that contain significantly higher levels of fat. A hedonic model shows that each unitary increase in the leanness of ground beef products carries a price premium of $.0206/lb. If LFGB garners a 10% share of the ground beef market, the retail price of all ground beef products will increase by $.01/lb. and consumption will increase by 39.75 million lbs. The price of commercial cows will increase by $.56/cwt. Price quantity, and welfare measures are magnified as the market share captured by LFGB increases.
Supersymmetric Two-Boson Equation: Bilinearization and Solutions
Creators: name: Liu, Q. P.
name: Yang, Xiao-Xia
Publisher: name: arXiv
Year: 2005
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: A bilinear formulation for the supersymmetric two-boson equation is derived. As applications, some solutions are calculated for it. We also construct a bilinear Backlund transformation.
description: 8 pages
Escape configuration lattice near the nematic-isotropic transition: Tilt analogue of blue phases
Creators: name: Chakrabarti, Buddhapriya
name: Hatwalne, Yashodhan
name: Madhusudana, N. V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We predict the possible existence of a new phase of liquid crystals near the nematic-isotropic ($ NI $) transition. This phase is an achiral, tilt-analogue of the blue phase and is composed of a lattice of {\em double-tilt}, escape-configuration cylinders. We discuss the structure and the stability of this phase and provide an estimate of the lattice parameter.
description: 5 pages, 6 figures (major revision, typos corrected, references added)
Landwirtschaftlicher Strukturwandel unter soziologischen Aspekten
Creators: name: Sutter, Maria
name: Sutter, Maria
Publisher: name: Unknown
Year: 2004

description: Forecasts on structural adjustment processes in agriculture based on financial, structural and socioeconomic key data may be reliable on an aggregated level. On an enterprise level, the consideration of only these aspects is not sufficient to explain structural change. The aim of this study was to investigate structural change in agriculture under a sociological point of view. Based on an oral and written survey with active and former farmers as well as with farm successors in the Obwalden canton, personal and social aspects affecting structural change were analysed. In a qualitative content analysis of the results of the oral interviews, possible causes for structural change-relevant decisions were examined. Among economic aspects, the presence of intrinsic (self fulfilment and pleasure at work) and social (social acceptance, tradition) values seems to be an important criterion for or against the take-over decision and/or the choice of an agricultural occupation. Premature farm abandonment frequently results from the combination of a high working load and low incomes. The results of the qualitative content analysis were confirmed in the evaluation of the written survey with descriptive statistics and a factor analysis. As a result of this work, it could be shown that personal and social aspects play a very important role for key events of structural change (occupation choice, take-over and decisions to give up farming).
The effect of tides on near-core rotation: analysis of 35 Kepler $γ$ Doradus stars in eclipsing and spectroscopic binaries
Creators: name: Li, Gang
name: Guo, Zhao
name: Fuller, Jim
name: Bedding, Timothy R.
name: Murphy, Simon J.
name: Colman, Isabel L.
name: Hey, Daniel R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We systematically searched for gravity- and Rossby-mode period spacing patterns in Kepler eclipsing binaries with $γ$ Doradus pulsators. These stars provide an excellent opportunity to test the theory of tidal synchronisation and angular momentum transport in F- and A-type stars. We discovered 35 systems that show clear patterns, including the spectroscopic binary KIC 10080943. Combined with 45 non-eclipsing binaries with $γ$ Dor components that have been found using pulsation timing, we measured their near-core rotation rates and asymptotic period spacings. We find that many stars are tidally locked if the orbital periods are shorter than 10 days, in which the near-core rotation periods given by the traditional approximation of rotation (TAR) are consistent with the orbital period. Compared to the single stars, $γ$ Dor stars in binaries tend to have slower near-core rotation rates, likely a consequence of tidal spin-down. We also find three stars that have extremely slow near-core rotation rates. To explain these, we hypothesise that unstable tidally excited oscillations can transfer angular momentum from the star to the orbit, and slow the star below synchronism, a process we refer to as `inverse tides'.
description: 13 pages, 10 figures, accepted by MNRAS
A Unified Picture with Neutrino As a Central Feature
Creators: name: Pati, Jogesh C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the first part of this talk it is discussed why observed neutrino oscillations (which suggest the existence of right-handed neutrinos with certain Dirac and Majorana masses) seem to select out the route to higher unification based on the symmetry SU(4)-color. This in turn selects out the effective symmetry in 4D near the GUT/string scale to be either SO(10) or minimally G(224)= SU(2)_L\times SU(2)_R \times SU(4)^c. The same conclusion is reached by the likely need for leptogenesis as the means for baryogenesis and also by the success of certain fermion mass-relations including m_b(M_{GUT})\approx m_τ, together with m(ν^τ)_{Dirac}\approx m_{top}(M_{GUT}). In the second part, an attempt is made to provide a unified picture of a set of diverse phenomena based on an effective G(224) symmetry or SO(10), possessing supersymmetry. The phenomena in question include: (a) fermion masses and mixings, (b) neutrino oscillations, (c) CP non-conservation, (d) flavor violations in quark and lepton sectors, as well as (e) baryogenesis via leptogenesis. Including SM and SUSY contributions, the latter being sub-dominant, the framework correctly accounts for Δm_K, Δm_{B_d}, S(B_d -> J/ψK_s) and ε_K, and predicts S(B_d-> ϕK_s) to be in the range +(0.65-0.73), close to the SM-prediction. It also quite plausibly accounts for the observed baryon excess Y_B\approx 10^{-10}. Furthermore the model predicts enhanced rates for mu -> e gamma, tau-> mu gamma and mu N-> e N and also measurable electric dipole moment for the neutron. Expectations arising within the same framework for proton decay are summarized at the end. It is stressed that the potential for discovering proton decay in a megaton-size detector would be high.
description: 46 pages
Validating Students’ Library Experience Survey using Rasch Model
Creators: name: Scoulas, Jung Mi
name: Dunya, Beyza Aksu
name: Groote, Sandra L De
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: subject: Library and Information Studies
subject: FOS: Media and communications
subject: 80706 Librarianship

description: Few studies have investigated the psychometric property of new instruments developed locally to assess students’ library experience, such as their behavior, perception and attitude towards library use. Validating a survey instrument is critical because using untested assessment instruments is more likely to lead to a lack of credibility in the results, as well as a lack of accuracy in the study’s purpose (Sullivan, 2011). This study used data from a locally developed student library experience survey distributed in Spring 2018 at a large public research university library to examine undergraduate and graduate students’ behaviors, attitudes and perceptions of library use. To test the validity of the survey as to whether six subdomains of the library experience survey contributed to a single construct, library experience, the study used Rasch model framework. This study contributes to the field as a first example using the Rasch model for library assessment purposes. Suggestions for best practices are discussed.
Landwirtschaftlicher Bodenmarkt - Dominanz der nicht-landwirtschaftlichen uber die landwirtschaftlichen Faktoren?
Creators: name: Giuliani, Gianluca
name: Rieder, Peter
name: Giuliani, Gianluca
name: Rieder, Peter
Publisher: name: Unknown
Year: 2003
Subjects: Industrial Organization
Land Economics/Use

description: The aim of the study presented in this article is to identify existing conflicts of land use and ownership in the 'Landwirtschaftszone', together with the problems arising therefore. This paper discusses determinants of farmland prices in Canton Zurich. A hedonic price model was used to estimate 1) the implicit value of an agricultural use of a land parcel, 2) the implicit value of the option to convert a farm parcel to a non-farm use and 3) the implicit consumptive value (value of owning land) of agricultural land. The analysis found farmland prices are influenced by agricultural production attributes as well as factors that influence the non-agricultural demand for land. In Canton Zurich, it can be assumed that economic development has already taken place in all communities in which it was possible. Its effect on farmland prices is therefore already manifested by influencing factors such as population density and the circumstances regarding land use. Once the new law on farmland became effective (1.1.1994), speculatory motives became much less a feature of land purchases. The weight of the factors determining price has thus shifted from "non-agricultural" to "agricultural". Arousing concern is on the other hand the fact that after 1994, the likelihood of transactions on good parcels located in economically strong communities has shrunk significantly. The ruling on maximum price may be responsible for the demise of the agricultural land market. The policy recommendations arising from the results relate both to the provisions of farmland legislation and to aspects of the law on space planning. In particular, innovations are proposed with regard to the keeping of price statistics, the terms of taking possession at income value and the definition of agricultural structures.
Tagharan, Urbat'agirk': Facsimiles of the first Armenian printed books 1512-1513
Creators: name: Assfalg, Julius
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 60 (1976): Oriens christianus, Band 60
Nodal quasiparticle in pseudogapped colossal magnetoresistive manganites
Creators: name: Mannella, N.
name: Yang, W.
name: Zhou, X. J.
name: Zheng, H.
name: Mitchell, J. F.
name: Zaanen, J.
name: Devereaux, T. P.
name: Nagaosa, N.
name: Hussain, Z.
name: Shen, Z. -X.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A characteristic feature of the copper oxide high-temperature superconductors is the dichotomy between the electronic excitations along the nodal (diagonal) and antinodal (parallel to the Cu-O bonds) directions in momentum space, generally assumed to be linked to the "d-wave" symmetry of the superconducting state. Angle-resolved photoemission measurements in the superconducting state have revealed a quasiparticle spectrum with a d-wave gap structure that exhibits a maximum along the antinodal direction and vanishes along the nodal direction. Subsequent measurements have shown that, at low doping levels, this gap structure persists even in the high-temperature metallic state, although the nodal points of the superconducting state spread out in finite "Fermi arcs". This is the so-called pseudogap phase, and it has been assumed that it is closely linked to the superconducting state, either by assigning it to fluctuating superconductivity or by invoking orders which are natural competitors of d-wave superconductors. Here we report experimental evidence that a very similar pseudogap state with a nodal-antinodal dichotomous character exists in a system that is markedly different from a superconductor: the ferromagnetic metallic groundstate of the colossal magnetoresistive bilayer manganite La1.2Sr1.8Mn2O7. Our findings therefore cast doubt on the assumption that the pseudogap state in the copper oxides and the nodal-antinodal dichotomy are hallmarks of the superconductivity state.
description: To appear in Nature
Sink flow deforms the interface between a viscous liquid and air into a tip singularity
Creators: name: Pont, S. Courrech du
name: Eggers, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In our experiment, an interface between a viscous liquid and air is deformed by a sink flow of constant flow rate to form a sharp tip. Using a microscope, the interface shape is recorded down to a tip size of 1 $\rm{μm}$. The curvature at the tip is controlled by the distance $h$ between the tip and the sink. As a critical distance $h^{\star}$ is approached, the curvature diverges like $1/(h-h^{\star})^3$ and the tip becomes cone-shaped. As the distance to the sink is decreased further, the opening angle of the cone vanishes like $h^2$. No evidence for air entrainment was found, except when the tip was inside the orifice.
description: accepted for publication at PRL
Pycnonuclear reactions in dense stellar matter
Creators: name: Yakovlev, D. G.
name: Levenfish, K. P.
name: Gnedin, O. Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We discuss pycnonuclear burning of highly exotic atomic nuclei in deep crusts of neutron stars, at densities up to 1e13 g/cc. As an application, we consider pycnonuclear burning of matter accreted on a neutron star in a soft X-ray transient (SXT, a compact binary containing a neutron star and a low-mass companion). The energy released in this burning, while the matter sinks into the stellar crust under the weight of newly accreted material, is sufficient to warm up the star and initiate neutrino emission in its core. The surface thermal radiation of the star in quiescent states becomes dependent of poorly known equation of state (EOS) of supranuclear matter in the stellar core, which gives a method to explore this EOS. Four qualitatively different model EOSs are tested against observations of SXTs. They imply different levels of the enhancement of neutrino emission in massive neutron stars by (1) the direct Urca process in nucleon/hyperon matter; (2) pion condensates; (3) kaon condensates; (4) Cooper pairing of neutrons in nucleon matter with the forbidden direct Urca process. A low level of the thermal quiescent emission of two SXTs, SAX J1808.4-3658 and Cen X-4, contradicts model (4). Observations of SXTs test the same physics of dense matter as observations of thermal radiation from cooling isolated neutron stars, but the data on SXTs are currently more conclusive.
description: 4 pages, 3 figures, style file included. Proc. of ENAM-2004, Callaway Gardens, Sept. 2004; Europ. Phys. J. A, 2005, in press
Cascade Dynamics of Multiplex Propagation
Creators: name: Centola, Damon
name: Macy, Michael W.
name: Eguiluz, Victor M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Random links between otherwise distant nodes can greatly facilitate the propagation of disease or information, provided contagion can be transmitted by a single active node. However we show that when the propagation requires simultaneous exposure to multiple sources of activation, called multiplex propagation, the effect of random links is just the opposite: it makes the propagation more difficult to achieve. We calculate analytical and numerically critical points for a threshold model in several classes of complex networks, including an empirical social network.
description: 4 pages, 5 figures, for similar work visit http://hsd.soc.cornell.edu and http://www.imedea.uib.es/physdept
Fluctuating dynamics at the quasiperiodic onset of chaos, Tsallis q-statistics and Mori's q-phase thermodynamics
Creators: name: Hernández-Saldaña, H.
name: Robledo, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We analyze the fluctuating dynamics at the golden-mean transition to chaos in the critical circle map and find that trajectories within the critical attractor consist of infinite sets of power laws mixed together. We elucidate this structure assisted by known renormalization group (RG) results. Next we proceed to weigh the new findings against Tsallis' entropic and Mori's thermodynamic theoretical schemes and observe behavior to a large extent richer than previously reported. We find that the sensitivity to initial conditions has the form of families of intertwined q-exponentials, of which we determine the q-indexes and the generalized Lyapunov coefficient spectra. Further, the dynamics within the critical attractor is found to consist of not one but a collection of Mori's q-phase transitions with a hierarchical structure. The value of Mori's `thermodynamic field' variable q at each transition corresponds to the same special value for the entropic index q. We discuss the relationship between the two formalisms and indicate the usefulness of the methods involved to determine the universal trajectory scaling function and/or the ocurrence and characterization of dynamical phase transitions.
description: Resubmitted to Physical Review E. The title has been changed slightly and the abstract has been extended. There is a new subsection following the conclusions that explains the role and usefulness of the q-statistics in the problem studied. Other minor changes througout the text
Active Optical Clock
Creators: name: Chen, Jingbiao
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This letter presents the principles and techniques of active optical clock, a special laser combining the laser physics of one-atom laser, bad-cavity gas laser, super-cavity stabilized laser and optical atomic clock. As an example, a compact version of active optical clock based on thermal Strontium atomic beam shows a quantum-limited linewidth of 0.51 Hz, which is insensitive to laser cavity-length noise, and may surpass the recorded narrowest 6.7 Hz of Hg ion optical clock and 27Hz of very recent optical lattice clock. The estimated 0.1Hz one-second instability and 0.27Hz uncertainty are limited only by the relativistic Doppler effect may be improved to 10mHz by using cold atoms.
description: 5 Pages, 4 Figures. Submitted to PRL
Excitation Function of the Longitudinal Expansion in Central Nuclear Collisions
Creators: name: Bleicher, Marcus
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Longitudinal hadron spectra from Proton-Proton (pp) and nucleus-nucleus (AA) collisions from $E_{lab}= 2$ AGeV to $\sqrt s=200$ AGeV are investigated. The widths of the rapidity spectra for various particle species increases monotonously with energy. The present calculation indicates no sign of a step like behaviour as excepted from the Kaon transverse mass systematics. For Pions, the transport simulation is consistent with a Landau type scaling of the rapidity widths, both in central AA reactions and in pp collisions. However, other hadron species do not follow the Landau scaling. The present model predicts a decreasing rapidity width with particle mass for newly produced particles, not supporting a Landau type flow interpretation.
description: Proceedings of the ICPAQGP 05
Discovery of an Optically-Faint Quasar at z=5.70 and Implications for the Faint End of the Quasar Luminosity Function
Creators: name: Mahabal, A.
name: Stern, D.
name: Bogosavljevic, M.
name: Djorgovski, S. G.
name: Thompson, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations of an optically-faint quasar, RD J114816.2+525339, discovered from deep multi-color observations of the field around the z = 6.42 quasar SDSS J1148+5251. The two quasars have a projected separation of 109 arcsec and both are outliers in r-z versus z-J color-color space. Keck spectroscopy reveals RD J114816.2+525339 to be a broad-absorption line quasar at z = 5.70. With z_AB = 23.0, RD J114816.2+525339 is 3.3 mag fainter than SDSS J1148+5251, making it the faintest quasar known at z>5.5. This object was identified in a survey of ~2.5 square degrees. The implied surface density of quasars at these redshifts and luminosities is broadly consistent with previous extrapolations of the faint end of the quasar luminosity function and supports the idea that active galaxies provide only a minor component of the reionizing ultraviolet flux at these redshifts.
description: 10 pages, 3 eps figures; Accepted for publication in ApJ Letters
EDUCAÇÃO INCLUSIVA E REALIDADE: O TRABALHO DOCENTE E O CONTEXTO DAS ESCOLAS PÚBLICAS BRASILEIRAS PARA O ATENDIMENTO DA PESSOA COM DEFICIÊNCIA NAS SÉRIES INICIAIS DO ENSINO FUNDAMENTAL
Creators: name: Ianca Miranda
Publisher: name: figshare
Year: 2020
Subjects: subject: 130312 Special Education and Disability
subject: FOS: Educational sciences

description: O artigo trata da inclusão da pessoa com deficiência no sistema público de ensino brasileiro. O objetivo é identificar uma forma como as instituições de ensino públicas desenvolvem ações inclusivas para a Educação desses sujeitos nas Séries Iniciais do Ensino Fundamental, tendo como usar a aprendizagem e o desenvolvimento dos mesmos. O trabalho analisa dados de uma pesquisa queutilizou o método quantitativo e foi realizado em seis escolas do sistema público de ensino da área urbana de Belém, capital do Estado do Pará, na região Norte do Brasil. Simultaneamente, elaborou uma pesquisa bibliográfica para embasamento teórico, com autores que tratam detemas relacionados à Inclusão e Educação Especial, além de autores que abordam temas vinculados aquestões pedagógicas e educacionais. Na pesquisa de campo, os instrumentos utilizados para coleta de dados foram entrevistas semiestruturadas com professores e diretores dessas escolas e entra no ambiente escolar e no interior da sala de aula, durante o funcionamento dessesespaços. Os resultados apontados para o desenvolvimento de ações importantes por parte da comunidade escolar, buscando integrar a Pessoa com Deficiência dentro do contexto dessas escolas de práticas educativas inclusivas para professores e projetos pedagógicos de inclusão por parte dos coordenadores e gestores, que, mesmo diante das dificuldades enfrentados pela Escola Pública, enfrentam ações de resistência, contribuindo para diminuir a desigualdade existente em relação a esses sujeitos, ocasionada pela falta de políticas pública que permite que a escola pública brasileira torne-se minimamente inclusiva.