cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
General relativistic MHD simulations of non-thermal flaring in Sagittarius A*
Creators: name: Chatterjee, Koushik
name: Markoff, Sera
name: Neilsen, Joseph
name: Younsi, Ziri
name: Witzel, Gunther
name: Tchekhovskoy, Alexander
name: Yoon, Doosoo
name: Ingram, Adam
name: van der Klis, Michiel
name: Boyce, Hope
name: Do, Tuan
name: Haggard, Daryl
name: Nowak, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Sagittarius A* exhibits regular variability in its multiwavelength emission, including daily X-ray flares and roughly continuous near-infrared (NIR) flickering. The origin of this variability is still ambiguous since both inverse Compton and synchrotron emission are possible radiative mechanisms. The underlying particle distributions are also not well constrained, particularly the non-thermal contribution. In this work, we employ the GPU-accelerated general relativistic magnetohydrodynamics (GRMHD) code H-AMR perform a study of flare flux distributions, including the effect of particle acceleration for the first time in high-resolution 3D simulations of Sgr A*. For the particle acceleration, we use the general relativistic ray-tracing (GRRT) code BHOSS to perform the radiative transfer, assuming a hybrid thermal+non-thermal electron energy distribution. We extract ~60 h lightcurves in the sub-millimetre, NIR and X-ray wavebands, and compare the power spectra and the cumulative flux distributions of the lightcurves to statistical descriptions for Sgr A* flares. Our results indicate that non-thermal populations of electrons arising from turbulence-driven reconnection in weakly magnetised accretion flows lead to moderate NIR and X-ray flares and reasonably describe the X-ray flux distribution while fulfilling multiwavelength flux constraints. These models exhibit high rms% amplitudes, >~150% both in the NIR and the X-rays, with changes in the accretion rate driving the 230~GHz flux variability, in agreement with Sgr A* observations.
description: Accepted by MNRAS
Entanglement can enhance the distinguishability of entanglement-breaking channels
Creators: name: Sacchi, Massimiliano F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show the rather counterintuitive result that entangled input states can strictly enhance the distinguishability of two entanglement-breaking channels.
description: 2 pages, 1 eps figure
Covidaleyrodes Dubey & Evans, 2025, gen. nov.
Creators: name: Dubey, Anil Kumar
name: Evans, Gregory A.
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Aleyrodidae
Covidaleyrodes

description: Key to slide-mounted puparia of Covidaleyrodes gen. nov. and related genera
1. Submarginal ridge/furrow absent, or if present, then not interrupted by caudal furrow; eighth abdominal segment not trilobed ................................................................................................... 2
-. Submarginal ridge/furrow interrupted by caudal furrow; eighth abdominal segment trilobed................................................................................................ Aleurolobus Quaintance & Baker, 1914
2. Thoracic and caudal tracheal pores opening areas without large oval-shaped sclerotizations on the submargin............ 3
-. Thoracic and caudal tracheal pores opening areas with large oval-shaped sclerotizations on the submargin, filled with microtubercles................................................................. Margaritaplena Dubey, 2020
3. Crescent-shaped submarginal wax glands absent............................................................. 4
-. Crescent-shaped submarginal wax glands present......................... Crescentaleyrodes David & Jesudasan, 1987
4. Puparial margin lobulated or serrated; inner posterior and lateral margins of vasiform orifice without a comb of teeth; caudal furrow absent........................................................................................ 5
-. Puparial margin smooth or crenulate; inner posterior and lateral margins of vasiform orifice with a comb of teeth; caudal furrow present........................................................................ Dialeurodes Cockerell, 1902
5. Vasiform orifice elevated; first abdominal setae absent; meso- and metathoracic setae present; tracheal combs present but pores absent at margin; abdominal segments rhachisform; submarginal furrow absent and ridge present..................................................................................... Sphericaleyrodes Selvakumaran & David, 1996
-. Vasiform orifice not elevated; first abdominal setae present; meso- and metathoracic setae absent; tracheal combs absent but pores indicated at margin; abdominal segments not rhachisform; submarginal furrow present and ridge absent............................................................................................. Covidaleyrodes gen. nov.
description: Published as part of Dubey, Anil Kumar & Evans, Gregory A., 2025, Covidaleyrodes flos, a new whitefly genus and species (Hemiptera: Aleyrodidae) infesting an endemic woody climber, Artabotrys speciosus (Magnoliales: Annonaceae) in the Andaman Islands, India, pp. 379-388 in Zootaxa 5620 (2) on page 381, DOI: 10.11646/zootaxa.5620.2.10, http://zenodo.org/record/15219245
ECONOMIC ANALYSIS OF TEMIK ON CITRUS IN THE INDIAN RIVER AREA IN SOUTHEASTERN FLORIDA
Creators: name: Blakeley, Lindsey
name: Weldon, Richard N.
name: Fairchild, Gary F.
name: Blakeley, Lindsey
name: Weldon, Richard N.
name: Fairchild, Gary F.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Crop Production/Industries
subject: mature citrus
subject: resets
subject: revenue-cost
subject: net return
subject: grapefruit

description: Temik [R](aldicarb) is a pesticide labeled for use on several citrus crops to control rust mite, whitefly, nematode and brown citrus aphid pests. Analysis of previous research experiments indicates that this pesticide is beneficial to both orange and grapefruit production and that both cost savings and higher yields can be experienced in many types of groves. Actual grove data shows that net returns for mature grapefruit that receive Temik [R] can be $500 per acre greater than net returns for identical acreage that uses other pest control options. Also, based on grove reset data it is shown that with an application of Temik [R] the resulting increased yields for three-year-old trees more than cover the additional cost of applying the Temik [R].
Study on the Path of Ideological and Political Education in the Process of Training New Agricultural Science and Technology Talents
Creators: name: HUANG Wei
name: WANG Daobo
name: LIU Zhaoliang
name: HUANG Wei
name: WANG Daobo
name: LIU Zhaoliang
Publisher: name: Unknown
Year: 2021
Subjects: subject: Agribusiness
subject: Excellent talents in agriculture and forestry, Ideological and political course, Garden, Horticulture

description: The training system of outstanding agricultural and forestry talents emphasizes "people-oriented and morality first". As the pillars of the national cause of agriculture, rural areas and farmers, agricultural and forestry college students not only share the commonness of ordinary college students, but also have the special attribute of professional group. This requires that ideological and political educators must pay attention to the particularity of this group of college students, so as to carry out ideological and political education work. Thus it can be seen that exploring the ideological and political education model in line with the characteristics of this kind of college students is of great practical significance to achieving the goal of moral education of excellent agricultural and forestry talents, to enhancing the effect of ideological and political education of agricultural and forestry college students and to promoting the all-round development of agricultural and forestry college students.
Non-Commutative Geometry, Categories and Quantum Physics
Creators: name: Bertozzini, Paolo
name: Conti, Roberto
name: Lewkeeratiyutkul, Wicharn
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Category Theory (math.CT)
subject: Quantum Physics (quant-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 46L87 (Primary) 46M15, 16D90, 18F99, 81R60, 81T05, 83C65 (Secondary)

description: After an introduction to some basic issues in non-commutative geometry (Gel'fand duality, spectral triples), we present a "panoramic view" of the status of our current research program on the use of categorical methods in the setting of A.Connes' non-commutative geometry: morphisms/categories of spectral triples, categorification of Gel'fand duality. We conclude with a summary of the expected applications of "categorical non-commutative geometry" to structural questions in relativistic quantum physics: (hyper)covariance, quantum space-time, (algebraic) quantum gravity.
description: Survey paper, 70 pages, AMS-LaTeX2e, results unchanged, considerably expanded version of the published paper (only for the arXiv repository), bibliography updated to October 2009, significant improvements and expansions in several sections, added appendix with selected recent references
ANALYSIS OF STRATEGIC MARKETING DECISIONS FOR ORGANIC AGRICULTURAL PRODUCERS: A CASE STUDY
Creators: name: Peterson, H. Christopher
name: Phillips, Jon C.
name: Peterson, H. Christopher
name: Phillips, Jon C.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Industrial Organization
subject: Marketing
subject: FOS: Economics and business

description: This article is a business strategy case study of a group of agricultural producers. One aspect of their strategic decision is whether or not to establish a firm to market their organic vegetables jointly. Another aspect of the decision is which distribution channel to pursue. Data for the paper were obtained from multiple sources, including trade journals, academic journals, and directed interviews with key informants from industry, academic institutions, and government. Face-to-face, structured interviews with members of the grower group were also conducted to obtain data about their resources and skills. An overview of conditions facing the organic vegetable industry (especially demand conditions) is included. The results could apply to other vegetable producers (organic or conventional) who are evaluating new distribution channels.
OPTIMAL STOCKING DENSITY AND FOOD SAFETY RISKS IN STEER PRODUCTION ENTERPRISE
Creators: name: Nganje, William E.
name: Kaitibie, Simeon
name: Brorsen, B. Wade
name: Epplin, Francis M.
name: Nganje, William E.
name: Kaitibie, Simeon
name: Brorsen, B. Wade
name: Epplin, Francis M.
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety
Production Economics

description: Reasonably high stocking densities generally lead to high profit for steer grazing enterprises. However, higher stocking densities result in high microbial counts, creating food safety concerns, especially with the advent of BSE in recent years. This study explores the impact of production and output price uncertainty on optimal stocking density when microbial shedding presents a food safety problem. The optimal grazing pressure is based on the expected utility maximization framework, and a stochastic linear response and plateau production function. Results show that uncertainty and food safety problems lead to lower stocking density, and lower profits. However, reducing the potential incidence of microbial shedding guarantees future profits to the enterprise, and continuity in production.
The polarized electron target as a new solar-neutrino detector
Creators: name: Misiaszek, M.
name: Ciechanowicz, S.
name: Sobkow, W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper, we analyze the scattering of solar neutrinos on the polarized electron target, and predict how the effect of parity violation in weak interactions may help to distinguish neutrino signal from detector background. We indicate that the knowledge of the Sun motion across the sky is sufficient to predict the day/night asymmetry in the $(ν_ee^-)$ scattering on the polarized electron target. To make this detection feasible, the polarized electron target for solar neutrinos needs to be build from magnetic materials, e.g. from ferromagnetic iron foils, paramagnetic scintillator crystals or scintillating ferrofluids.
description: 3 pages, 2 eps figures, revtex
ISSUES IN MODELING BIOTERRORISM IN THE AGRIFOOD SECTOR
Creators: name: Huff, Karen
name: Meilke, Karl D.
name: Turvey, Calum G.
name: Huff, Karen
name: Meilke, Karl D.
name: Turvey, Calum G.
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety

description: When considering the possibility of a bioterrorist attack on the United States food system it is generally agreed that U.S. agriculture is vulnerable to such an attack. In addition to the importance of being able to predict the likelihood of such an event and thereby attempt to prevent it, it is equally important to address the health and economic implications of an actual occurrence of a bioterrorist attack to provide insight into the potential costs resulting from such an unfortunate incident. Given the scarcity of funds to spend on prevention an understanding of the economic costs is important information for policy makers faced with the difficult decision of where to allocate such spending. The objective of this study is to examine the economy-wide effects of a bioterrorist attack, such as the introduction of foot-and-mouth disease, on the U.S. economy. In order to quantify the impact of the introduction of FMD to the U.S. livestock sector a computable general equilibrium model of the global economy is employed. The impact of FMD on the livestock sector is modeled via negative productivity shocks to the sector. Its potential impact on trade is modeled via a partial ban on U.S. exports of meats, dairy products and livestock. The introduction of FMD in the United States would have a huge impact on the domestic economy without even considering the costs of fighting and containing the outbreak. In an ideal world such a costly attack on the United States can be avoided entirely. However, as this study suggests, the importance of having plans in place for dealing with such an outbreak quickly and effectively is vital to the domestic economy.
Conserved current of nonconserved quantities
Creators: name: Xiao, Cong
name: Niu, Qian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We provide a unified semiclassical theory for the conserved current of nonconserved quantities, and manifest it in two physical contexts: the spin current of Bloch electrons and the charge current of mean-field Bogoliubov quasiparticles. Several longstanding problems that limit the playground of the conserved spin current of electrons are solved. We reveal that the hitherto overlooked torque quadrupole density and Berry phase correction to the torque dipole density are essential to assure a circulating spin current with vanishing net flow at equilibrium. The band geometric origin of bulk spin transport is ascertained to be the momentum space spin texture and Berry curvature instead of the spin Berry curvature, paving the way for material related studies. In superconductors the attained conserved charge current corresponds to the quasiparticle charge current renormalized by the condensate backflow. Its circulation at equilibrium gives an orbital magnetization, which involves the characteristics of superconductivity, such as the Berry curvature arising from unconventional pairing and an orbital magnetic moment induced by the charge dipole of moving quasiparticles.
description: 4 pages
Pulsive feedback control for stabilizing unstable periodic orbits in a nonlinear oscillator with a non-symmetric potential
Creators: name: Litak, G.
name: Ali, M.
name: Saha, L. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We examine a strange chaotic attractor and its unstable periodic orbits in case of one degree of freedom nonlinear oscillator with non symmetric potential. We propose an efficient method of chaos control stabilizing these orbits by a pulsive feedback technique. Discrete set of pulses enable us to transfer the system from one periodic state to another.
description: 11 pages, 4 figures
Kondo effect in quantum dots coupled to ferromagnetic leads with noncollinear magnetizations
Creators: name: Swirkowicz, R.
name: Wilczynski, M.
name: Barnas, J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Non-equilibrium Green's function technique has been used to calculate spin-dependent electronic transport through a quantum dot in the Kondo regime. The dot is described by the Anderson Hamiltonian and is coupled either symmetrically or asymmetrically to ferromagnetic leads, whose magnetic moments are noncollinear. It is shown that the splitting of the zero bias Kondo anomaly in differential conductance decreases monotonically with increasing angle between magnetizations, and for antiparallel configuration it vanishes in the symmetrical case while remains finite in the asymmetrical one.
description: 4 pages, 3 figures
Moduli of ADHM Sheaves and Local Donaldson-Thomas Theory
Creators: name: Diaconescu, Duiliu-Emanuel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The ADHM construction establishes a one-to-one correspondence between framed torsion free sheaves on the projective plane and stable framed representations of a quiver with relations in the category of complex vector spaces. This paper studies the geometry of moduli spaces of representations of the same quiver with relations in the abelian category of coherent sheaves on a smooth complex projective curve $X$. In particular it is proven that this moduli space is virtually smooth and related byrelative Beilinson spectral sequence to the curve counting construction via stable pairs of Pandharipande and Thomas. This yields a new conjectural construction for the local Donaldson-Thomas theory of curves as well as a natural higher rank generalization.
description: 61 pages AMS Latex; v2: minor corrections, reference added; v3: some proofs corrected using the GIT construction of the moduli space due to A. Schmitt; main results unchanged; final version to appear in J. Geom. Phys
ANALYSIS OF CORN PRODUCTION AND USAGE
Creators: name: Gaskins, Katie
name: Conley, Dennis M.
name: Gaskins, Katie
name: Conley, Dennis M.
Publisher: name: Unknown
Year: 2003
Subjects: Demand and Price Analysis
Production Economics

description: A selection of three-dimension graphs shows the supply and usage of corn for the U.S. at the state level, and for Texas at the county level. An example of a three-dimension price surface is provided for select counties in Nebraska. All was done using Arch View software.
FUSE Measurements of Far Ultraviolet Extinction. I. Galactic Sight Lines
Creators: name: Sofia, U. J.
name: Wolff, M. J.
name: Rachford, B.
name: Gordon, K. D.
name: Clayton, G. C.
name: Cartledge, S. I. B.
name: Martin, P. G.
name: Draine, B. T.
name: Mathis, J. S.
name: Snow, T. P.
name: Whittet, D. C. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present extinction curves that include data down to far ultraviolet wavelengths (FUV; 1050 - 1200 A) for nine Galactic sight lines. The FUV extinction was measured using data from the Far Ultraviolet Spectroscopic Explorer. The sight lines were chosen for their unusual extinction properties in the infrared through the ultraviolet; that they probe a wide range of dust environments is evidenced by the large spread in their measured ratios of total-to-selective extinction, R_V = 2.43 - 3.81. We find that extrapolation of the Fitzpatrick & Massa relationship from the ultraviolet appears to be a good predictor of the FUV extinction behavior. We find that predictions of the FUV extinction based upon the Cardelli, Clayton & Mathis (CCM) dependence on R_V give mixed results. For the seven extinction curves well represented by CCM in the infrared through ultraviolet, the FUV extinction is well predicted in three sight lines, over-predicted in two sight lines, and under-predicted in 2 sight lines. A Maximum Entropy Method analysis using a simple three component grain model shows that seven of the nine sight lines in the study require a larger fraction of grain materials to be in dust when FUV extinction is included in the models. Most of the added grain material is in the form of small (radii < 200 A) grains.
description: Accepted for publication in the Astrophysical Journal. 31 pages with 7 figures
Three Dimensional Evolution of a Relativistic Current Sheet : Triggering of Magnetic Reconnection by the Guide Field
Creators: name: Zenitani, S.
name: Hoshino, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The linear and non-linear evolution of a relativistic current sheet of pair ($e^{\pm}$) plasmas is investigated by three-dimensional particle-in-cell simulations. In a Harris configuration, it is obtained that the magnetic energy is fast dissipated by the relativistic drift kink instability (RDKI). However, when a current-aligned magnetic field (the so-called "guide field") is introduced, the RDKI is stabilized by the magnetic tension force and it separates into two obliquely-propagating modes, which we call the relativistic drift-kink-tearing instability (RDKTI). These two waves deform the current sheet so that they trigger relativistic magnetic reconnection at a crossover thinning point. Since relativistic reconnection produces a lot of non-thermal particles, the guide field is of critical importance to study the energetics of a relativistic current sheet.
description: 12 pages, 4 figures; fixed typos and added a footnote [24]
POSSIBLE CONTRIBUTIONS OF A COURSE IN COMMODITY EXCHANGES AND FUTURES TRADING TO A STUDENT'S GENERAL EDUCATION
Creators: name: Gauthier, Wayne M.
name: Gauthier, Wayne M.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business
subject: Teaching/Communication/Extension/Profession

description: General education courses are important in preparing a student for life. Often, agricultural economics courses are perceived to be vocational and not particularly well-suited to the development of life-long skills. This paper considers the eight life-long skills cited as being important to a student's general education at Louisiana State University and argues that varied bits of subject matter presented in the Commodity Exchange and Futures Trading Course contribute to the development of each one of these skills. Such contributions need to be pointed out to those who argue for more general education courses in the curriculum at the expense of discipline courses.
THE CHARACTERISTICS AFFECTING CONSUMERS' PERCEPTIONS AND PREFERENCES FOR UNITED STATES VERSUS IMPORTED BEEF
Creators: name: Umberger, Wendy J.
name: Feuz, Dillon M.
name: Calkins, Chris R.
name: Sitz, Bethany M.
name: Umberger, Wendy J.
name: Feuz, Dillon M.
name: Calkins, Chris R.
name: Sitz, Bethany M.
Publisher: name: Unknown
Year: 2003
Subjects: Consumer/Household Economics
Food Consumption/Nutrition/Food Safety

description: In 2002, consumers from Chicago and Denver participated in an experimental auction and taste panel to elicit willingness to pay for beef originating from the United States, Australia and Canada. Approximately 69% of the consumers were willing to pay a premium of 19% more for a "Guaranteed U.S" steak than for an unlabeled steak. When comparing consumers' taste preferences for beef originating from various countries of origin, it appears that a segment of the population prefers the taste and is willing to pay a premium for beef originating from Australia. A larger segment of the experimental population, 34% of the consumers, preferred the taste and was willing to pay a premium for the Canadian steak. However, on average, consumers were willing to pay premiums of approximately 31% and 10% more for the U.S. steak than for the Australian and Canadian steaks, respectively.
OUTSIDE PERSPECTIVES ON AGRIBUSINESS RESEARCH, TEACHING, AND OUTREACH
Creators: name: Holder, David L.
name: Holder, David L.
Publisher: name: Unknown
Year: 2002
Subjects: Research and Development/Tech Change/Emerging Technologies
Teaching/Communication/Extension/Profession
Agribusiness

description: Many of my thoughts in this paper come from the author's experience in conducting comprehensive reviews of agricultural economics departments. The author suggests the need to look at the forces affecting the demand for our products and be willing to challenge many of the myths about the structure and performance of the university system and the agribusiness system. Agriculture is losing a lot of its uniqueness and becoming part of the mainstream. Colleges of agriculture have changed considerably in the last 50 years; they will change even more in the next fifty years. What is our unique niche? How willing are we to adapt to its challenges? These questions must be answered in regard to the future of agribusiness research, teaching, and outreach.
Melvin's "magnetic universe", the role of the magnetic tension and the implications for gravitational collapse
Creators: name: Tsagas, Christos G.
name: Mavrogiannis, Panagiotis
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Electromagnetism appears to have the potential to alter the fate of relativistic gravitational implosion. Coulomb forces, for example, can in principle prevent the ultimate collapse of charged matter to a singularity. Also, half a century ago, Mael Melvin noted that magnetic forcelines do not collapse under their own gravity, no matter how strong the latter may be. Instead, magnetic fields seemed capable of stabilising themselves against gravitational self-contraction. Intrigued, Melvin wondered whether magnetism could also support against the realistic collapse of charged matter. Here, we look back into these issues by means of two complementary scenarios. The first reconsiders Melvin's highly idealised "magnetic universe" and reaches the same conclusion, namely that magnetic fields do not self-gravitate. The second is a realistic collapse scenario, like that of magnetised massive compact stars. Looking for answers to Melvin's question, we find that magnetic fields do show a generic tendency to support against relativistic gravitational implosion. The magnetic effect in question involves the curvature of the host space, it grows stronger as the collapse progresses and the triggering agent is the field's tension. In other words, the reason is the elasticity of the field lines and their inherent tendency to react against anything that distorts them from equilibrium. In this case, the distorting agent is the ever increasing curvature of the collapsing host space.
description: Typos corrected. Matches published version
U.S. AND WESTERN CHINA ARE PARTNERS IN WTO, GLOBAL RESOURCE MANAGEMENT, AGRIBUSINESS AND ECOSYSTEM ANALYSIS
Creators: name: Thor, Eric P.
name: Li, Haiyan
name: Thor, Eric P.
name: Li, Haiyan
Publisher: name: Unknown
Year: 2002
Subjects: Resource /Energy Economics and Policy
Agribusiness
International Relations/Trade

description: Western China has many biodiversity, environmental resource, trade, rural finance, ecosystem and information technology challenges similar to both the Western U.S. and Europe. This paper provides examples of these similarities between Western China and the U.S.
SUPPLY CHAIN COORDINATION: A CASE STUDY OF VEGETABLE GROWERS IN COLORADO
Creators: name: Hine, Susan E.
name: Umberger, Wendy J.
name: Hine, Susan E.
name: Umberger, Wendy J.
Publisher: name: Unknown
Year: 2002
Subjects: Industrial Organization

description: Small agricultural producers around the country are finding it increasingly difficult to remain competitive in a market place dominated by the consolidation of agricultural production. This consolidation has had a serious impact on vegetable growers in northeastern Colorado who have recently banded together to form a cooperative in the hopes that they would be in a better position to market their vegetables. This paper discusses the results of the market and feasibility study. Section I provides a review of the literature on vertical coordination. Section II details the analysis of the fresh and processed vegetable market. Section III then provides a discussion of the processing feasibility study and addresses the importance of incorporating knowledge management into production decisions-even for producers with small operations. The paper then closes with recommendations and directions for future studies.
New limits on the ordered moments in alpha-Pu and Ga-stabilized delta-Pu
Creators: name: Heffner, R. H.
name: Morris, G. D.
name: Fluss, M. J.
name: Chung, B.
name: MacLaughlin, D. E.
name: Shu, L.
name: Anderson, J. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present the first muon spin relaxation measurements ever performed on elemental Pu, and set the most stringent upper limits to date on the magnitude of the ordered moment in alpha-Pu and delta-stabilized Pu (alloyed with 4.3 at. % Ga). Assuming a nominal hyperfine coupling field of 1 kOe per Bohr magneton we set an upper limit of 0.001 Bohr magnetons for both materials at T = 4 K.
description: 4 pages, 3 figures. Submitted to 10th International Conference on Muon Spin Rotation, Relaxation and Resonance, Oxford, UK, August 2005
Boundary topological entanglement entropy in two and three dimensions
Creators: name: Bridgeman, Jacob C.
name: Brown, Benjamin J.
name: Elman, Samuel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The topological entanglement entropy is used to measure long-range quantum correlations in the ground state of topological phases. Here we obtain closed form expressions for topological entropy of (2+1)- and (3+1)-dimensional loop gas models, both in the bulk and at their boundaries, in terms of the data of their input fusion categories and algebra objects. Central to the formulation of our results are generalized $\mathcal{S}$-matrices. We conjecture a general property of these $\mathcal{S}$-matrices, with proofs provided in many special cases. This includes constructive proofs for categories up to rank 5.
description: 27+9 pages, comments welcome
Rank 2 Bundles with Meromorphic Connections with Poles of Poincaré Rank 1
Creators: name: Hertling, Claus
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 34M56, 34M35, 53C07

description: Holomorphic vector bundles on $\mathbb C\times M$, $M$ a complex manifold, with meromorphic connections with poles of Poincaré rank 1 along $\{0\}\times M$ arise naturally in algebraic geometry. They are called $(TE)$-structures here. This paper takes an abstract point of view. It gives a complete classification of all $(TE)$-structures of rank 2 over germs $\big(M,t^0\big)$ of manifolds. In the case of $M$ a point, they separate into four types. Those of three types have universal unfoldings, those of the fourth type (the logarithmic type) not. The classification of unfoldings of $(TE)$-structures of the fourth type is rich and interesting. The paper finds and lists also all $(TE)$-structures which are basic in the following sense: Together they induce all rank $2$ $(TE)$-structures, and each of them is not induced by any other $(TE)$-structure in the list. Their base spaces $M$ turn out to be 2-dimensional $F$-manifolds with Euler fields. The paper gives also for each such $F$-manifold a classification of all rank 2 $(TE)$-structures over it. Also this classification is surprisingly rich. The backbone of the paper are normal forms. Though also the monodromy and the geometry of the induced Higgs fields and of the bases spaces are important and are considered.
Towards a fullerene-based quantum computer
Creators: name: Benjamin, Simon C
name: Ardavan, Arzhang
name: Briggs, G Andrew D
name: Britz, David A
name: Gunlycke, Daniel
name: Jefferson, John
name: Jones, Mark A G
name: Leigh, David F
name: Lovett, Brendon W
name: Khlobystov, Andrei N
name: Lyon, S A
name: Morton, John J L
name: Porfyrakis, Kyriakos
name: Sambrook, Mark R
name: Tyryshkin, Alexei M
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Molecular structures appear to be natural candidates for a quantum technology: individual atoms can support quantum superpositions for long periods, and such atoms can in principle be embedded in a permanent molecular scaffolding to form an array. This would be true nanotechnology, with dimensions of order of a nanometre. However, the challenges of realising such a vision are immense. One must identify a suitable elementary unit and demonstrate its merits for qubit storage and manipulation, including input / output. These units must then be formed into large arrays corresponding to an functional quantum architecture, including a mechanism for gate operations. Here we report our efforts, both experimental and theoretical, to create such a technology based on endohedral fullerenes or 'buckyballs'. We describe our successes with respect to these criteria, along with the obstacles we are currently facing and the questions that remain to be addressed.
description: 20 pages, 13 figs, single column format
Realization of Topological Mott Insulator in a Twisted Bilayer Graphene Lattice Model
Creators: name: Chen, Bin-Bin
name: Da Liao, Yuan
name: Chen, Ziyu
name: Vafek, Oskar
name: Kang, Jian
name: Li, Wei
name: Meng, Zi Yang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Magic-angle twisted bilayer graphene has recently become a thriving material platform realizing correlated electron phenomena taking place within its topological flat bands. Several numerical and analytical methods have been applied to understand the correlated phases therein, revealing some similarity with the quantum Hall physics. In this work, we provide a Mott-Hubbard perspective for the TBG system. Employing the large-scale density matrix renormalization group on the lattice model containing the projected Coulomb interactions only, we identify a first-order quantum phase transition between the insulating stripe phase and the quantum anomalous Hall state with the Chern number of $\pm 1$. Our results not only shed light on the mechanism of the quantum anomalous Hall state discovered at three-quarters filling, but also provide an example of the topological Mott insulator, i.e., the quantum anomalous Hall state in the strong coupling limit.
description: 6+7 pages, 3+7 figures
One-Shot Manipulation of Dynamical Quantum Resources
Creators: name: Regula, Bartosz
name: Takagi, Ryuji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We develop a unified framework to characterize one-shot transformations of dynamical quantum resources in terms of resource quantifiers, establishing universal conditions for exact and approximate transformations in general resource theories. Our framework encompasses all dynamical resources represented as quantum channels, including those with a specific structure --- such as boxes, assemblages, and measurements --- thus immediately applying in a vast range of physical settings. For the particularly important manipulation tasks of distillation and dilution, we show that our conditions become necessary and sufficient for broad classes of important theories, enabling an exact characterization of these tasks and establishing a precise connection between operational problems and resource monotones based on entropic divergences. We exemplify our results by considering explicit applications to: quantum communication, where we obtain exact expressions for one-shot quantum capacity and simulation cost assisted by no-signalling, separability-preserving, and positive partial transpose-preserving codes; as well as to nonlocality, contextuality, and measurement incompatibility, where we present operational applications of a number of relevant resource measures.
description: 5+10 pages; published version
BPS saturation of the N=4 monopole by infinite composite-operator renormalization
Creators: name: Rebhan, A.
name: Schöfbeck, R.
name: van Nieuwenhuizen, P.
name: Wimmer, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum corrections to the magnetic central charge of the monopole in N=4 supersymmetric Yang-Mills theory are free from the anomalous contributions that were crucial for BPS saturation of the two-dimensional supersymmetric kink and the N=2 monopole. However these quantum corrections are nontrivial and they require infinite renormalization of the supersymmetry current, central charges, and energy-momentum tensor, in contrast to N=2 and even though the N=4 theory is finite. Their composite-operator renormalization leads to counterterms which form a multiplet of improvement terms. Using on-shell renormalization conditions the quantum corrections to the mass and the central charge then vanish both, thus verifying quantum BPS saturation.
description: 1+14 pages, 2 figures. v3: version to appear in Phys. Lett. B (Note added and minor corrections)
Awareness and utilization of genetic testing among Hispanic and Latino adults living in the US: The Hispanic Community Health Study/Study of Latinos
Creators: name: Daviglus, Martha L.
name: Zhang, Mengran
name: Isasi, Rosario
name: Gonzalez, Sara
name: Isasi, Carmen R.
name: Sofer, Tamar
name: Cai, Jianwen
name: Christensen, Kurt D.
name: Talavera, Gregory A.
name: Nelson, Sarah C.
name: Kaplan, Robert
name: Zawatsky, Carrie L. Blout
name: Argos, Maria
name: Granot-Hershkovitz, Einat
name: Perreira, Krista M.
name: Galbraith, Lauren N.
name: Green, Robert C.
Publisher: name: Elsevier
Year: 2022

description:
We investigated the awareness, perceived usefulness, and use of genetic testing among Hispanic and Latino individuals. Annual follow-up surveys for the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) from 2019 to April 2020 assessed participants' level of awareness and use of genetic tests to determine disease risks, likelihood of passing disease to children, disease treatment, or drug selection. They also were asked to rate the usefulness of the tests for managing a person's health on a 1 (not at all useful) to 10 (extremely useful) scale. There were 5,769 HCHS/SOL participants who completed at least one survey question. Of the target population, 55.2% was aware of at least one type of genetic test. Awareness varied between HCHS/SOL enrollment sites and was higher among individuals who had higher educational attainment and had higher incomes. Only 3.3% of the target population reported receiving one or more of the tests described. HCHS/SOL individuals rated the usefulness as 8.4, on average, with lower scores observed among U.S.-born individuals compared to individuals born outside the United States, with differences by HCHS/SOL enrollment sites. In conclusion, while awareness of genetic testing among Hispanic and Latino individuals varies by location, education, and income, perceptions about its usefulness are high while experiences with testing are rare. Results identify groups and locations that may benefit from greater outreach about the capabilities of genetic testing and precision medicine.
Development of a prototype scanner for pulsed ultrasound computed tomography
Creators: name: McFarland, Sheila J.
Publisher: name: University of British Columbia
Year: 2009

description: A prototype scanner for pulsed ultrasound computed tomography (UCT) has been built and tested with the aim of developing new imaging techniques that hold potential for the improved early detection of breast cancer. Two reconstruction algorithms were tested for their ability to produce quantitative 2D cross-sections of γ[sub k](r) and reflectivity, R(r), where [formulas not included] k(r) and p(r) are the compressibility and density throughout the image space, while k[sub o] and p[sub o] describe water. γ[sub p] is subsequently calculated from γ[sub k] and R. A Direct Fourier Method (DFM) that ignores attenuation was tested both as is and with the addition of an approximate attenuation correction based on the average distance ultrasound travels through tissue and water. An Algebraic Reconstruction Technique (ART) was also developed, which iteratively solves for γ[sub k] and R subject to rigorous attenuation correction. In computer simulation, the DFM produced valid γ[sub k] and γ[sub p] cross-sections only in the absence of attenuation and when |r| < 0.05|r₃|, where r and r₃ are the position vectors of any scatter point and the source or detector, respectively. Points separately by 0.07 mm were resolved in simulation, and point amplitudes were reconstructed quantitatively to within 97 ± 3% and 95 ± 4% of their actual values for γ[sub k] and γ[sub p], respectively. Beyond |r| < 0.05|r₃|, Gaussian point-spread-functions (PSF's) were distorted into low amplitude halos. The approximate attenuation correction failed in simulation. Experimentally, the DFM reconstructed images of a cylindrical tissue phantom with negative γ[sub k] and R and a 3 mm diameter. The resulting γ[sub k] and R cross-sections were primarily negative with an object diameter of 2.94 ± 0.06 mm and 1.94 ± 0.04 mm for γ[sub k] and R, respectively. A valid γ[sub p] could not be calculated due to the narrow R function. Experimentally, point-spread-functions were severely distorted by errors of only 1-2% in the measurement of |r₃|. In simulation, valid γ[sub k] and γ[sub p] cross-sections were reconstructed with the ART for |r| < 0.3|r[sub j]| and in the presence of strong attenuation. Points separated by 0.05 mm were resolved in simulation, and point amplitudes were reconstructed quantitatively to within 100 ± 14% and 99 ± 4% of their actual values for γ[sub k] and γ[sub p], respectively. Strong attenuation was corrected to within an error of 0.2%. Convergence was not possible for images of more than 20 x 20 pixels due to ill-conditioning of the system. These theoretical results indicate, though, that the method holds promise given the application of conditioning algorithms.
Anomalous thermoelectric power of Mg1-xAlxB2 system with x = 0.0 to 1.0
Creators: name: Mudgel, Monika
name: Awana, V. P. S.
name: Lal, R.
name: Kishan, H.
name: Chandra, L. S. Sharth
name: Ganesan, V.
name: Narlikar, A. V.
name: Bhalla, G. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thermoelectric power, S(T) of the Mg1-xAlxB2 system has been measured for x = 0.0, 0.1, 0.2, 0.4, 0.6, 0.8 and 1.0. XRD, resistivity and magnetization measurements are also presented. It has been found that the thermoelectric power is positive for x = 0.4 and is negative for x = 0.6 over the entire temperature range studied up to 300 K. The thermoelectric power of x = 0.4 samples vanishes discontinuously below a certain temperature, implying existence of superconductivity. In general, the magnitude of the thermoelectric power increases with temperature up to a certain temperature, and then it starts to decrease towards zero base line. In order to explain the observed behavior of the thermoelectric power, we have used a model in which both diffusion and phonon drag processes are combined by using a phenomenological interpolation between the low and high temperature behaviors of the thermoelectric power. The considered model provides an excellent fit to the observed data. It is further found that Al doping enhances the Debye temperature.
description: 19 pages Text + Figs. suggestions/comments(awana@mail.nplindia.ernet.in)
Ab initio screening of metallic MAX ceramics for advanced interconnect applications
Creators: name: Sankaran, Kiroubanand
name: Moors, Kristof
name: Tőkei, Zsolt
name: Adelmann, Christoph
name: Pourtois, Geoffrey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The potential of a wide range of layered ternary carbide and nitride MAX phases as conductors in interconnect metal lines in advanced CMOS technology nodes has been evaluated using automated first principles simulations based on density functional theory. The resistivity scaling potential of these compounds, i.e. the sensitivity of their resistivity to reduced line dimensions, has been benchmarked against Cu and Ru by evaluating their transport properties within a semiclassical transport formalism. In addition, their cohesive energy has been assessed as a proxy for the resistance against electromigration and the need for diffusion barriers. The results indicate that numerous MAX phases show promise as conductors in interconnects of advanced CMOS technology nodes.
description: 26 pages, 4 figures, 4 tables
Nanowire Acting as a Superconducting Quantum Interference Device
Creators: name: Johansson, A.
name: Sambandamurthy, G.
name: Jacobson, N.
name: Shahar, D.
name: Tenne, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present the results from an experimental study of the magneto-transport of superconducting wires of amorphous Indium-Oxide, having widths in the range 40 - 120 nm. We find that, below the superconducting transition temperature, the wires exhibit clear, reproducible, oscillations in their resistance as a function of magnetic field. The oscillations are reminiscent of those which underlie the operation of a superconducting quantum interference device.
description: 4 pages, 4 figures, 1 table
Localised Dirac eigenmodes, chiral symmetry breaking, and Goldstone's theorem at finite temperature
Creators: name: Giordano, Matteo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: I show that a finite density of near-zero localised Dirac modes in the chirally broken phase of a gauge theory can lead to the disappearance of the massless excitations predicted by the Goldstone theorem at finite temperature.
description: Revised version: title changed; error corrected in Eq. 11, conclusions unchanged; discussion improved, comments added about symmetry breaking and relation with Goldstone's theorem; published version, 13 pages