cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Chern-Simons Gravity Dual of BCFT
Creators: name: Takayanagi, Tadashi
name: Uetoko, Takahiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we provide a Chern-Simons gravity dual of a two dimensional conformal field theory on a manifold with boundaries, so called boundary conformal field theory (BCFT). We determine the correct boundary action on the end of the world brane in the Chern-Simons gauge theory. This reproduces known results of the AdS/BCFT for the Einstein gravity. We also give a prescription of calculating holographic entanglement entropy by employing Wilson lines which extend from the AdS boundary to the end of the world brane. We also discuss a higher spin extension of our formulation.
description: 29 pages, 3 figures, minor changes, published version
Hyperentanglement-enhanced quantum illumination
Creators: name: Prabhu, Ashwith Varadaraj
name: Suri, Baladitya
name: Chandrashekar, C. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In quantum illumination, the signal mode of light, entangled with an idler mode, is dispatched towards a suspected object bathed in thermal noise and the returning mode, along with the stored idler mode, is measured to determine the presence or absence of the object. In this process, entanglement is destroyed but its benefits in the form of classical correlations and enlarged Hilbert space survive. Here, we propose the use of probe state hyperentangled in two degrees of freedom - polarization and frequency, to achieve a significant 12dB performance improvement in error probability exponent over the best known quantum illumination procedure in the low noise regime. We present a simple receiver model using four optical parametric amplifiers (OPA) that exploits hyperentanglement in the probe state to match the performance of the feed-forward sum-frequency generator (FF-SFG) receiver in the high noise regime. By replacing each OPA in the proposed model with a FF-SFG receiver, further 3dB improvement in the performance of a lone FF-SFG receiver can be seen.
description: 5 pages, 2 figures, Published version
On the mechanism of branching in negative ionization fronts
Creators: name: Arrayas, M.
name: Fontelos, M. A.
name: Trueba, J. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We explain a mechanism for branching of a planar negative front. Branching occurs as the result of a balance between the destabilizing effect of impact ionization and the stabilizing effect of electron diffusion on ionization fronts. The dispersion relation for transversal perturbation is obtained analytically and reads: $s = |k|/[2 (1 + |k|)] - D |k|^2$, where $D$, which is assumed to be small, is the ratio between the electron diffusion coefficient and the intensity of the externally imposed electric field. We estimate the spacing $λ$ between streamers in a planar discharge and deduce a scaling law $λ\sim D^{1/3}$.
NET FARM INCOME ESTIMATED TO DROP PRECIPITOUSLY IN 1998
Creators: name: Olson, Kent D.
name: Olson, Kent D.
Publisher: name: Unknown
Year: 1998
Subjects: Agricultural Finance

description: Farm income in Southwestern Minnesota is estimated to drop to extremely low and possibly negative levels in 1998 due to the very low prices now in the market place. Expected high yields on some farms will soften but not overcome the blow of the low prices; those farms with crop losses face a worse situation. Based on the average 1997 farm income statement in the Southwestern Minnesota Farm Business Management Association and the price and yield conditions for 1998, average gross cash income in 1998 is estimated to drop 17% from 1997. Before depreciation is subtracted, net cash farm income in 1998 is predicted to be below 10% of 1997 levels: $5,367 compared to $56,469 in 1997. After accounting for depreciation and inventory changes, accrual net farm income is estimated to drop from $40,598 in 1997 to -$42,647 in 1998 -- a drop of over 200% (Table 1). This would be the first negative average accrual net farm income in the 59 year history of the Southwestern Minnesota Farm Business Management Association. When these losses are factored into the balance sheet, the debt/asset ratio is estimated to rise from 48% at the end of 1997 to 53% at the end of 1998 with assets valued on a market basis. The rate of return on assets (ROA) is estimated to drop from 6.3% to -6.7%, and the rate of return on equity (ROE) is estimated to drop from 5.1% to -13.8% (Table 2). Both ROA and ROE are estimated using assets valued on a market basis.
Vortex motion of the Euler and Lake equations
Creators: name: Yang, Cheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We start by surveying the planar point vortex motion of the Euler equations in the whole plane, half-plane and quadrant. Then we go on to prove non-collision property of 2-vortex system by using the explicit form of orbits of 2-vortex system in the half-plane. We also prove that the $N$-vortex system in the half-plane is nonintegrable for $N>2$, which is suggested previously by numerical experiments without rigorous proof. The skew-mean-curvature (or binormal) flow in $\mathbb R^n,\;n\geq3$ with certain symmetry can be regarded as point vortex motion of the 2D lake equations. We compare point vortex motions of the Euler and lake equations. Interesting similarities between the point vortex motion in the half-plane, quadrant and the binormal motion of coaxial vortex rings, sphere product membranes are addressed. We also raise some open questions in the paper.
description: 27 pages, 4 figures
Theory of Frozen Waves
Creators: name: Zamboni-Rached, M.
name: Recami, E.
name: Hernandez-Figueroa, H. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Optics (physics.optics)
subject: General Physics (physics.gen-ph)
subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: In this work, starting by suitable superpositions of equal-frequency Bessel beams, we develop a theoretical and experimental methodology to obtain localized stationary wave fields, with high transverse localization, whose longitudinal intensity pattern can approximately assume any desired shape within a chosen interval 0 < z < L of the propagation axis z. Their intensity envelope remains static, i.e. with velocity v=0; so that we have named ``Frozen Waves" (FW) these new solutions to the wave equations (and, in particular, to the Maxwell equations). Inside the envelope of a FW only the carrier wave does propagate: And the longitudinal shape, within the interval 0 < z < L, can be chosen in such a way that no nonnegligible field exists outside the pre-determined region (consisting, e.g., in one or more high intensity peaks). Our solutions are noticeable also for the different and interesting applications they can have, especially in electromagnetism and acoustics, such as optical tweezers, atom guides, optical or acoustic bistouries, various important medical apparata, etc.
description: 29 pages, 9 figures
THE ENDOWMENT EFFECT AND WTA: A QUASI-EXPERIMENTAL TEST
Creators: name: MacDonald, H.F.
name: Bowker, James Michael
name: MacDonald, H.F.
name: Bowker, James Michael
Publisher: name: Unknown
Year: 1994
Subjects: subject: Environmental Economics and Policy
subject: Contingent valuation
subject: Endowment effect
subject: Property rights
subject: Substitution effect

description: This paper reports a test of the endowment effect in an economic analysis of localized air pollution. Regression techniques are used to test the significance of perceived property rights on household WTP for improved air quality versus WTA compensation to forgo an improvement in air quality. Our experiment contributes to the research into the WTP/WTA divergence by providing a new basis for supporting the existence of an endowment effect. Our results are in contrast to recent work by Shogren et al. which supports the substitution proposition of Hanemann while rejecting the endowment effect.
AN EMPIRICAL ANALYSIS OF LOUISIANA SMALL FARMERS' INVOLVEMENT IN THE CONSERVATION RESERVE PROGRAM
Creators: name: McLean-Meyinsse, Patricia E.
name: Hui, Jianguo
name: Joseph, Randolph
name: McLean-Meyinsse, Patricia E.
name: Hui, Jianguo
name: Joseph, Randolph
Publisher: name: Unknown
Year: 1994
Subjects: subject: Land Economics/Use
subject: Binomial and multinomial logit models
subject: Conservation Reserve Program
subject: Nonparticipation
subject: Small farmers
subject: Socioeconomic characteristics

description: The study examines Louisiana small farmers' reasons for not participating in the Conservation Reserve Program (CRP), their awareness of the program, and their willingness to participate in the program. The results suggest that: farmers do not participate in the CRP if revenues from cropland are an important source of income, or if they are tenants; awareness is significantly related to education, income, race, and average return per acre; willingness is positively influenced by payment per acre, age, and farm status. Participation depends on whether payments per acre are comparable to the opportunity costs of removing cropland from production.
Lightweight Detection of a Small Number of Large Errors in a Quantum Circuit
Creators: name: Linden, Noah
name: de Wolf, Ronald
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Suppose we want to implement a unitary $U$, for instance a circuit for some quantum algorithm. Suppose our actual implementation is a unitary $\tilde{U}$, which we can only apply as a black-box. In general it is an exponentially-hard task to decide whether $\tilde{U}$ equals the intended $U$, or is significantly different in a worst-case norm. In this paper we consider two special cases where relatively efficient and lightweight procedures exist for this task. First, we give an efficient procedure under the assumption that $U$ and $\tilde{U}$ (both of which we can now apply as a black-box) are either equal, or differ significantly in only one $k$-qubit gate, where $k=O(1)$ (the $k$ qubits need not be contiguous). Second, we give an even more lightweight procedure under the assumption that $U$ and $\tilde{U}$ are Clifford circuits which are either equal, or different in arbitrary ways (the specification of $U$ is now classically given while $\tilde{U}$ can still only be applied as a black-box). Both procedures only need to run $\tilde{U}$ a constant number of times to detect a constant error in a worst-case norm. We note that the Clifford result also follows from earlier work of Flammia and Liu, and da Silva, Landon-Cardinal, and Poulin. In the Clifford case, our error-detection procedure also allows us efficiently to learn (and hence correct) $\tilde{U}$ if we have a small list of possible errors that could have happened to $U$; for example if we know that only $O(1)$ of the gates of $\tilde{U}$ are wrong, this list will be polynomially small and we can test each possible erroneous version of $U$ for equality with $\tilde{U}$.
description: 20 pages. v3: some added references, minor textual improvements. This version will appear in Quantum
Listening Across the Green Line
Creators: name: Papaeti, Anna
Publisher: name: Zenodo
Year: 2023
Subjects: Listening
Citizenship
Musicology
Sound Studies
Conflict Studies
Cyprus

description: Short text reflecting on listening and citizenship focusing on the Cyprus conflict – in connection to the traumas and legacies of the 1974 Turkish invasion – and the ways it has been sonically and acoustically conveyed in everyday life on the radio. The text explores the ways in which both listening and the radio became potentially transformative.The text was published in the academic blog "Greek Studies Now - Cultural Analysis Network" run by the University of Oxford and the University of Amsterdam: https://gc.fairead.net/green-line?fbclid=IwAR0p2X4gW3sDnfAErbPyW-CgPpbnM7fSOJwXWufUnMYH7L8zlzMj0GDDYeg

This is a slightly enlarged version of a text that was first published as a part of portfolio titled 'Acts of citizenship in present-day Greece' edited by Kristina Gedgaudaitė, Dimitris Papanikolaou and Theophilos Trampoulis at the Journal of Greek Media & Culture vo. 9, issue 2 (November 2023), 223-225; https://intellectdiscover.com/content/journals/10.1386/jgmc_00079_5. This portofolio of reflections drew its inspiration from the colloquium Being Citizens Together: Rethinking Social Citizenship in Greece that took place on 11 February 2023 at the National Museum of Contemporary Art (EMST). It includes an interview with the curators of the event Dimitris Papanikolaou and Theophilos Tramboulis with Kristina Gedgaudaitė as well as critical reflections and creative writing interventions by eight of the participants: Christos Chrysanthopoulos, Sofia Dona, Brikena Gishto, Pafsanias Karathanasis, Erofili Kokkali, Iris Lykourioti, Anna Papaeti and Theo Prodromidis.
The computer modelling of fallen snow
Creators: name: Fearing, Paul
Publisher: name: University of British Columbia
Year: 2009

description: One of nature's greatest beauties is the way fresh snow covers the world in a perfect blanket of crystalline white. Snow replaces sharp angles with gentle curves, and clings to surfaces to form ghostly silhouettes. It is said the Inuit have 50 different words for snow, yet even they can be left speechless, as snow is one of the most complex natural materials in existence. This research presents a new model of visual snow accumulation for computer graphics. We are primarily concerned with creating and simulating fallen snow (not falling snow - an important distinction), with our ultimate goal to produce view-independent, static, 3D snow surface models that can be used in artistic and scientific visualisation, film, and advertising. Our contribution is divided into two major components: snow placement and snow stability. Each are essential for modelling the appearance of a thick layer of snowfall on the ground. Snow placement requires us to determine how much snow falls upon the scene, and where it accumulates. We simulate this with an adaptive particle/surface hybrid system that allows for such phenomena as flake flutter, flake dusting and wind-blown snow. We compute snow accumulation by shooting particles upwards towards the sky, giving each source surface independent control over its own sampling density, accuracy and computation time. Importance ordering minimises sampling effort while maximising visual information, generating smoothly improving global results that can be interrupted at any point. Once snow lands on the ground, our stability model moves material away from physically unstable areas in a series of small, simultaneous avalanches. We use a simple local stability test that handles very steep surfaces, obstacles, edges, and snow transit due to wind. Our stability algorithm is flexible enough to simulate other materials, such as flour, sand, and flowing water. We show physical plausibility by comparing various aspects of our approach with real snow images. As proof that our algorithm is flexible and usable, we provide several examples of snow on complex models containing hundreds of thousands of polygons. The completed 3D snow surface model can be easily imported into commercial modelling and rendering software, allowing users to convert existing animations to a brand new season.
Bubbling Supertubes and Foaming Black Holes
Creators: name: Bena, Iosif
name: Warner, Nicholas P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct smooth BPS three-charge geometries that resolve the zero-entropy singularity of the U(1) x U(1) invariant black ring. This singularity is resolved by a geometric transition that results in geometries without any branes sources or singularities but with non-trivial topology. These geometries are both ground states of the black ring, and non-trivial microstates of the D1-D5-P system. We also find the form of the geometries that result from the geometric transition of N zero-entropy black rings, and argue that, in general, such geometries give a very large number of smooth bound-state three-charge solutions, parameterized by 6N functions. The generic microstate solution is specified by a four-dimensional hyper-Kahler geometry of a certain signature, and contains a ``foam'' of non-trivial two-spheres. We conjecture that these geometries will account for a significant part of the entropy of the D1-D5-P black hole, and that Mathur's conjecture might reduce to counting certain hyper-Kahler manifolds.
description: 40 pages, harvmac. v2 references added, typo corrected
WHEN SELF-INTEREST IS SELF-DEFEATING: THE PUBLIC GOODS EXPERIMENT AS A TEACHING TOOL
Creators: name: Nelson, Robert G.
name: Beil, Richard O.
name: Nelson, Robert G.
name: Beil, Richard O.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Teaching/Communication/Extension/Profession
subject: Teaching
subject: Experimental economics
subject: Public goods

description: This simple classroom experiment demonstrates many of the behavioral phenomena associated with the voluntary provision of a public good. The mechanics of the game are explained in detail and complete instructions are provided, as well as suggestions for follow-up lectures. Influences such as anonymous voting, persuasion, returns to free-riding, and duration of association can be explored in connection with concepts of incentives, individual rationality, and group welfare. A number of variations and extensions can be used to incorporate prisoners' dilemmas, incentive compatible mechanisms, negative externalities, and Coasian bargaining.
Holomorphic extensions of representations: (II) geometry and harmonic analysis
Creators: name: Kroetz, Bernhard
name: Stanton, Robert J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Representation Theory (math.RT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We continue our discussion from part I.
description: 46 pages, to appear in GAFA
GROWTH IN AGRICULTURAL LOAN MARKET SHARE FOR ARKANSAS COMMERCIAL BANKS
Creators: name: Ahrendsen, Bruce L.
name: Dixon, Bruce L.
name: Priyanti, Atien
name: Ahrendsen, Bruce L.
name: Dixon, Bruce L.
name: Priyanti, Atien
Publisher: name: Unknown
Year: 1994
Subjects: subject: Agricultural Finance
subject: Banks
subject: Farm debt
subject: Loan portfolio
subject: Market share

description: Changes in commercial bank market shares of farm debt are decomposed into portfolio decisions loanable funds availability and loan market size for 64 counties in Arkansas from 1986 through 1990. A seemingly unrelated regression model is hypothesized to identify county characteristics that are related to changes in commercial bank market shares. Regression results indicate that county differences in economic activity, the relative risk associated with agriculture, farm structure and regional location contributed to changes in commercial bank market shares. The results imply a market niche for rural commercial banks emphasizing agricultural loans in the presence of unlimited branch banking.
Einstein metrics of cohomogeneity one with $S^{4m+3}$ as principal orbit
Creators: name: Chi, Hanci
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this article, we construct non-compact complete Einstein metrics on two infinite series of manifolds. The first series of manifolds are vector bundles with $\mathbb{S}^{4m+3}$ as principal orbit and $\mathbb{HP}^{m}$ as singular orbit. The second series of manifolds are $\mathbb{R}^{4m+4}$ with the same principal orbit. For each case, a continuous 1-parameter family of complete Ricci-flat metrics and a continuous 2-parameter family of complete negative Einstein metrics are constructed. In particular, $\mathrm{Spin}(7)$ metrics $\mathbb{A}_8$ and $\mathbb{B}_8$ discovered by Cvetič et al. in 2004 are recovered in the Ricci-flat family. A Ricci flat metric with conical singularity is also constructed on $\mathbb{R}^{4m+4}$. Asymptotic limits of all Einstein metrics constructed are studied. Most of the Ricci-flat metrics are asymptotically locally conical (ALC). Asymptotically conical (AC) metrics are found on the boundary of the Ricci-flat family. All the negative Einstein metrics constructed are asymptotically hyperbolic (AH).
description: Remark 3.6 added. Details for Proposition 5.2 and Lemma 5.6 added
ENVIRONMENTAL AND ECONOMIC IMPACTS OF AGRICULTURAL POLICY REFORM: AN INTERREGIONAL COMPARISON
Creators: name: Painter, Kathleen M.
name: Young, Douglas L.
name: Painter, Kathleen M.
name: Young, Douglas L.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Agricultural and Food Policy
subject: Agrichemical leaching
subject: Agricultural policy
subject: Alternative agriculture
subject: Erosion
subject: Mathematical programming

description: Mathematical programming results revealed that moving toward more flexible agricultural policies would generate substantial economic and environmental gains in a North Carolina diversified cropping region. But in a Washington-Idaho dryland grains region, only the use of relatively new and sometimes problematic alternative cropping systems permitted environmental and economic gains under policy reform. In both regions, a recoupling policy, which links government payments to resource-conserving farming practices, was needed to protect environmental quality when market prices for program crops were high.
Nuclear pasta structures and symmetry energy
Creators: name: Xia, Cheng-Jun
name: Maruyama, Toshiki
name: Yasutake, Nobutoshi
name: Tatsumi, Toshitaka
name: Zhang, Ying-Xun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the framework of the relativistic mean field model with Thomas-Fermi approximation, we study the structures of low density nuclear matter in a three-dimensional geometry with reflection symmetry. The numerical accuracy and efficiency are improved by expanding the mean fields according to fast cosine transformation and considering only one octant of the unit cell. The effect of finite cell size is treated carefully by searching for the optimum cell size. Typical pasta structures (droplet, rod, slab, tube, and bubble) arranged in various crystalline configurations are obtained for both fixed proton fractions and $β$-equilibration. It is found that the properties of droplets/bubbles are similar in body-centered cubic (BCC) and face-centered cubic (FCC) lattices, where the FCC lattice generally becomes more stable than BCC lattice as density increases. For the rod/tube phases, the honeycomb lattice is always more stable than the simple one. By introducing an $ω$-$ρ$ cross coupling term, we further examine the pasta structures with a smaller slope of symmetry energy $L = 41.34$ MeV, which predicts larger onset densities for core-crust transition and non-spherical nuclei. Such a variation due to the reduction of $L$ is expected to have impacts on various properties in neutron stars, supernova dynamics, and binary neutron star mergers.
FACTORS INFLUENCING FARMERS' SELECTION OF A MILK HANDLER
Creators: name: Kilmer, Richard L.
name: Lee, Jonq-Ying
name: Carley, Dale H.
name: Kilmer, Richard L.
name: Lee, Jonq-Ying
name: Carley, Dale H.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Livestock Production/Industries
subject: Cooperatives
subject: Processors
subject: Attributes
subject: Selection
subject: Probit
subject: Dairy

description: A structural probit model is estimated to determine the change in the probability of selecting a milk handler. Cooperatives are thought to have lower prices and higher deductions than independent milk handlers and these factors reduce the probability that a farmer will select a cooperative by 0.39 and 0.32. Cooperatives are thought to have better services and an assured market and payment than independent mile handlers and these factors increase the probability that a farmer will select a cooperative by 0.20 and 0.26. This indicates that many cooperative members value monetary characteristics over non-monetary characteristics.
Zipf's law in Multifragmentation
Creators: name: Campi, Xavier
name: Krivine, Hubert
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss the meaning of Zipf's law in nuclear multifragmentation. We remark that Zipf's law is a consequence of a power law fragment size distribution with exponent $τ\simeq 2$. We also recall why the presence of such distribution is not a reliable signal of a liquid-gas phase transition.
A Cheeger Cut for Uniform Hypergraphs
Creators: name: Mulas, Raffaella
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics

description: The graph Cheeger constant and Cheeger inequalities are generalized to the case of hypergraphs whose edges have the same cardinality. In particular, it is shown that the second largest eigenvalue of the generalized normalized Laplacian is bounded both above and below by the generalized Cheeger constant, and the corresponding eigenfunctions can be used to approximate the Cheeger cut.
AMENITY BENEFITS AND PUBLIC POLICY: AN APPLICATION TO THE CONNECTICUT DAIRY SECTOR
Creators: name: Lopez, Rigoberto A.
name: Altobello, Marilyn A.
name: Shah, Farhed A.
name: Lopez, Rigoberto A.
name: Altobello, Marilyn A.
name: Shah, Farhed A.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Land Economics/Use
subject: Livestock Production/Industries
subject: Amenity benefits
subject: Policy
subject: Dairy
subject: Land use

description: This article develops a conceptual framework for analyzing the role of state-level policies towards the dairy sector in the presence of farmland amenity benefits, and applies it to Connecticut. Milk supply, demand and amenity benefit functions are estimated, and three exogenously determined milk prices are considered. The empirical findings show, under each price scenario, the extent to which land is underallocated to the dairy sector if amenity benefits are ignored. Analysis of policy options reveals that a partial production cost subsidy represents the least-cost alternative for attaining the socially optimal solution for the region.
Invariant tensors for the spin representation of so(7)
Creators: name: Westbury, Bruce W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 18D10, 16W35

description: We construct a pivotal category by a finite presentation and show that it is an integral form of the category of invariant tensors of the spin representation of the quantum group U_q(B_3) over the field of rational functions in q.
description: Uses pstricks
HEDONIC ESTIMATION APPLIED TO THE FARMLAND MARKET IN GEORGIA
Creators: name: Elad, Renata L.
name: Clifton, Ivery D.
name: Epperson, James E.
name: Elad, Renata L.
name: Clifton, Ivery D.
name: Epperson, James E.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Land Economics/Use
subject: Farmland prices
subject: Functional form
subject: Hedonic pricing

description: Farmland offered for its productive or consumptive value may be viewed as a class of goods characteristic of product differentiation. Using the generalized Box-Cox transformation, an unrestricted hedonic model was employed to derive implicit valuations of parcel attributes. Results suggest that the significance and level of importance of attributes on land pricing depends on the spatial extent of markets in Georgia. Differences in the productive or consumptive use of farmland may imply that different factors and functional forms are appropriate to different farmland markets.
Effect of electric field on the photoluminescence of polymer-inorganic nanoparticles composites
Creators: name: Aleshin, A. N.
name: Shcherbakov, I. P.
name: Alexandrova, E. L.
name: Lebedev, E. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on the effect of electric field on the photoluminescence, PL, from a composite consisting of a conjugated polymer mixed with zinc oxide nanoparticles. We have found that in the absence of electric field PL emission from the composite film has two maxima in the blue and green-yellow regions. Application of a voltage bias to planar gold electrodes suppresses the green-yellow emission and shifts the only PL emission maximum towards the blue region. Current-voltage characteristics of the polymer-nanoparticles composite exhibit the non-linear behavior typical of non-homogeneous polymer-inorganic structures. Generation of excited states in the composite structure implies the presence of several radiative recombination mechanisms including formation of polymer-nanoparticle complexes including exciplex states and charge transfer between the polymer and nanoparticle that can be controlled by an electric field.
description: 5 pages, 5 figures. accepted for publication in Solid State Communications
Boventer, Hermann (hrsg.): Muslime unter uns - Herausforderung an die Kirche
Creators: name: Troeger, Eberhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 26 Nr. 1 (1977): Ökumenische Rundschau, Band 26, Heft 1
A parsing explanation of linear movement asymmetry in natural language
Creators: name: Alphonce, Carl G.
Publisher: name: University of British Columbia
Year: 2009

description: Natural language sentences are made up of words. Groups of words which can act together as a unit are called constituents. Movement is a syntactic process which displaces a constituent from its canonical position. The moved constituent is called a filler. The position from which a filler is displaced is termed a gap. A gap is a particular type of empty category. Interestingly, a filler always appears to the left of its associated gap. My thesis is that this linearity constraint on filler-gap dependencies is not a syntactic constraint but rather a product of the parsing mechanism. I develop a parsing algorithm which can process filler-gap dependencies only if the filler is identified before the gap. What makes this possible in general is that I treat the problem of licensing and identification of empty categories during on-line processing as a case of ambiguity resolution. I develop a fine-grained typology of norninals (both overt and empty) which supports the use of underspecified representations. In turn, this permits the parser to resolve empty category ambiguities incrementally as parsing proceeds. The main results of the dissertation are as follows. The parsing algorithm presented herein offers an explanation for the curious fact that overt movement is leftward. It also explains why, in a language like Italian, postverbal DPs are preferentially interpreted as objects rather than subjects when they appear after optionally transitive verbs. There are also several predictions which arise from this work. The operation of the algorithm predicts that a prenominal relative clause is possible only in a language which permits personal pronouns to act as relative pronouns. There is also predicted to be a filled-gap effect with structures (such as left dislocation in English) for which there is an ambiguity as to whether movement has taken place. Finally, this research supports the view that the human language processing mechanism constructs a single underspecified representation, and resolves ambiguities incrementally as the parse progresses.
Chiral symmetry breaking and confinement: separating the scales
Creators: name: Evans, Nick
name: Rigatos, Konstantinos S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We review arguments that chiral symmetry breaking is triggered when the quark bilinear condensate's dimension passes through one ($γ=1$). This is supported by gap equations and more recently holographic models. Confinement may then be a separate property of the pure Yang-Mills theory below the scale of the dynamically generated quark mass, occurring at the scale of the pole in the deep IR running. Here, we use perturbative results for the running of the gauge coupling and $γ$ in asymptotically free SU($N_c$) gauge theories with matter in higher dimension representations to seek the best candidate theories where confinement and chiral symmetry breaking can be maximally separated. For example, SU(2) gauge theory with a single Weyl quark in the $S_3$ (dimension 4) representation may have a factor of 20 separation in scale. Such a theory could be simulated on the lattice to test the separation. We also propose studying multi-representation theories where the higher dimension representation forms a condensate at one scale that can be quite separate from the condensation scale of the second representation matter. The confinement scale would presumably be below the second scale. For example, SU(3) gauge theory with a Weyl adjoint fermion and ten fundamental quarks may have a separation of a factor of 20 also.
description: 9 pages, 2 figures, 1 table, v2: added commentary, v3: minor corrections, added references
ECONOMICS OF TRADE-OFF BETWEEN UREA NITROGEN AND POULTRY LITTER FOR RICE PRODUCTION
Creators: name: Govindasamy, Ramu
name: Cochran, Mark J.
name: Miller, David M.
name: Norman, Richard J.
name: Govindasamy, Ramu
name: Cochran, Mark J.
name: Miller, David M.
name: Norman, Richard J.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Crop Production/Industries
subject: Poultry litter
subject: Nitrogen
subject: Rice
subject: Programming

description: This paper identifies optimal combinations of nitrogen in the form of urea, fresh litter and composted litter for rice production. Traditional cost minimization techniques using data from experimental results conducted at three sites in Arkansas during 1991 have been employed. Comparisons between different scenarios indicate that the trade-off between the use of poultry litter and urea nitrogen depends on such factors as soil fertility, the yield response to litter application and the relative prices of nitrogen and litter. The use of litter is more economical at high target yields than at low target yields.
Non-Thermal Emergence of an Orbital-Selective Mott Phase in FeTe$_{1-x}$Se$_x$
Creators: name: Huang, Jianwei
name: Yu, Rong
name: Xu, Zhijun
name: Zhu, Jian-Xin
name: Jiang, Qianni
name: Wang, Meng
name: Wu, Han
name: Chen, Tong
name: Denlinger, Jonathan D.
name: Mo, Sung-Kwan
name: Hashimoto, Makoto
name: Gu, Genda
name: Dai, Pengcheng
name: Chu, Jiun-Haw
name: Lu, Donghui
name: Si, Qimiao
name: Birgeneau, Robert J.
name: Yi, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electronic correlation is of fundamental importance to high temperature superconductivity. Iron-based superconductors are believed to possess moderate correlation strength, which combined with their multi-orbital nature makes them a fascinating platform for the emergence of exotic phenomena. A particularly striking form is the emergence of an orbital selective Mott phase, where the localization of a subset of orbitals leads to a drastically reconstructed Fermi surface. Here, we report spectroscopic evidence of the reorganization of the Fermi surface from FeSe to FeTe as Se is substituted by Te. We uncover a particularly transparent way to visualize the localization of the $d_{xy}$ electron orbital through the suppression of its hybridization with the more coherent $d$ electron orbitals, which leads to a redistribution of the orbital-dependent spectral weight near the Fermi level. These noteworthy features of the Fermi surface are accompanied by a divergent behavior of a band renormalization in the $d_{xy}$ orbital. All of our observations are further supported by our theoretical calculations to be salient spectroscopic signatures of such a non-thermal evolution from a strongly correlated metallic phase towards an orbital-selective Mott phase in FeTe$_{1-x}$Se$_x$ as Se concentration is reduced.
description: 11 pages, 5 figures
General Equilibrium Analysis of Supply and Factor Returns in U.S. Agriculture, 1949-91
Creators: name: Munisamy, Gopinath
name: Roe, Terry L.
name: Munisamy, Gopinath
name: Roe, Terry L.
Publisher: name: Unknown
Year: 1995
Subjects: International Relations/Trade

description: General equilibrium - open economy trade theory and time series data on the US agricultural sector are used to provide insights into the structure of agricultural supply, factor returns and linkages to the rest of the economy. Output expansion and changes in factor rental rates depend on relative factor intensities. Theoretically consistent price elasticities of supply and factor rental rates are also obtained. The effect of the rest of the economy, particularly the increase in price of services, is found to have relatively large negative impacts on agriculture. The static effects on growth of supply and factor rental rates tend to be dominated by rate effects which are shown to have strong positive effects on returns to family labor. J.E.L. classification numbers: 013, 030, Qll
Electrified Accessible Retractable Linkage (E.A.R.L.)
Creators: name: Jones, Eli
name: Wesierski, Allysa
name: Cruz, Xitlali
name: Kupfer, Arturo
Publisher: name: Stanford Digital Repository
Year: 2025
Subjects: subject: Mechanical engineering
subject: FOS: Mechanical engineering
subject: Product realization
subject: Accessible design

description: Currently, there are more than 5.5 million wheelchair users in the United States alone. People in wheelchairs suffer from a lack of access to physical activity and green spaces. This contributes to disproportionately high risk of mental and physical health issues. The increasing availability of adaptive outdoor equipment, such as sit-skis and handcycles, is helping to alleviate this issue. However, transporting this specialized equipment has few to zero commercially available solutions. This threatens to drastically reduce the use, and thus accrued benefit, of newly prevalent adaptive equipment. Alongside Volkswagens Innovation Center in Belmont, our team has developed a mechanism which allows people in wheelchairs to independently mount and secure their adaptive outdoor equipment – particularly sit-skis and handcycles – to the exterior of a VW ID.Buzz. Our design leverages two symmetric “arms”, which attach to the vehicle’s roof rack and use electrically-driven linear motors to raise and lower an equipment securement mechanism from the vehicle’s roof to resting flat on the ground. Each arm consists of 3 telescoping linkages, which together rotate from a horizontal stowed position to 11 degrees from vertical in order to roll out an equipment platform, which rotates to lie flat on the ground. The user then places their equipment onto the platform and secures it using a rigid constraint around the wheels or skis. The equipment is then lifted to the roof of the vehicle via remote-controlled linear actuators. This entire process requires minimal exertion on behalf of the user, allowing people in wheelchairs to transport adaptive equipment independently. To this end, we designed and built a half scale, single arm version, allowing us to demonstrate the overall concept as well as conduct force and ergonomics tests. Our tests show that the prototype successfully lifts and lowers a simulated maximum equipment load of 100 lb – sufficient for even large electrified handcycles – but also that it does so without exceeding ADA requirements for maximum push/pull force exerted by the user (10 lb). Future work includes refining the securement system, designing and integrating roof rack attachment points, and reducing the overall width profile of the mechanism.
Environment, Welfare and Gains from Trade: A North-South Model in General Equilibrium
Creators: name: Diao, Xinshen
name: Roe, Terry L.
name: Diao, Xinshen
name: Roe, Terry L.
Publisher: name: Unknown
Year: 1995
Subjects: International Relations/Trade

description: The effects of environment on trade and welfare are analyzed in a modified Heckscher-Ohlin framework using a quasi-homothetic preferences to account for differences in countries' expenditure shares on health. Three types of pollution, local-disembodied, global-disembodied and embodied, result as a by-product of inputs used in production. For each case, the Walrasian, Pareto optimal and the Regulators' problem are analyzed. The optimal tax is shown to improve each country's welfare if the country is small in the world market. Otherwise, changes in the terms of trade may cause one country to be made better off at the expense of the other. Interdependence for the global-disembodied case is explored using a one-shot Nash game. For the embodied pollution, taxing the polluting input only can cause a decline in welfare when the polluting input is intensively used. Instead, a tax on the polluting input in combination with a subsidy to the non-polluting input is optimal. In general, the results suggest compensatory payments may be required to encourage abatement policies. Contrary to other approaches, an abatement policy does not necessarily decrease a country's comparative advantage, i.e., reduce exports of the polluting sector.
Fitzgerald, Michael (hrsg.): Moslems und Christen - Partner?
Creators: name: Troeger, Eberhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 26 Nr. 1 (1977): Ökumenische Rundschau, Band 26, Heft 1
Nonlinear dynamics of topological ferromagnetic textures for frequency multiplication
Creators: name: Rodrigues, Davi R.
name: Nothhelfer, Jonas
name: Mohseni, Morteza
name: Knapman, Ross
name: Pirro, Philipp
name: Everschor-Sitte, Karin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose that the non-linear radio-frequency dynamics and nanoscale size of topological magnetic structures associated to their well-defined internal modes advocate for their use as in-materio scalable frequency multipliers for spintronic systems. Frequency multipliers allow for frequency conversion between input and output frequencies, and thereby significantly increase the range of controllably accessible frequencies. In particular, we explore the excitation of eigenmodes of topological magnetic textures by fractions of the corresponding eigenfrequencies. We show via micromagnetic simulations that low-frequency perturbations to the system can efficiently excite bounded modes with a higher amplitude. For example, we excited the eigenmodes of isolated ferromagnetic skyrmions by applying half, a third and a quarter of the corresponding eigenfrequency. We predict that the frequency multiplication via magnetic structures is a general phenomenon which is independent of the particular properties of the magnetic texture, and works also for magnetic vortices, droplets and other topological textures.
description: 8 pages, 5 figures
Risk, Implicit Contracts and the Family in Rural Areas of Low-Income Countries
Creators: name: Rosenzweig, Mark R.
name: Rosenzweig, Mark R.
Publisher: name: Unknown
Year: 1986
Subjects: Consumer/Household Economics

description: In this paper the role of family structure in mitigating income volatility in the absence of income insurance in low-income agricultural environments is discussed. Hypotheses concerning the relationship between the membership, size and composition of households and insurance-based income transfers are tested using longitudinal data from India. A test is also performed of whether a household's ability to reduce risk ex post via family arrangements affects its willingness tobear risk ex ante through its selection of formal tenancy contracts. The results support these hypotheses concerning the risk-mitigating roles of both household structure and share contracts, and indicate as well the importance of heterogeneity in risk-aversion across households.
Confronting Braneworld Cosmology with Supernova data and Baryon Oscillations
Creators: name: Alam, Ujjaini
name: Sahni, Varun
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: FOS: Physical sciences

description: Braneworld cosmology has several attractive and distinctive features. For instance the effective equation of state in braneworld models can be both quintessence-like (w_0 \geq -1) as well as phantom-like (w_0 \leq -1). Models with w_0 \geq -1 (w_0 \leq -1) are referred to as Brane 2 (Brane 1) and correspond to complementary embeddings of the brane in the bulk. (The equation of state in Brane 1 can successfully cross the `phantom divide' at w = -1.) In this paper we compare the predictions of braneworld models to two recently released supernova data sets: the `Gold' data (Riess et al, 2004) and the data from the Supernova Legacy Survey (SNLS) (Astier et al, 2005). We also incorporate the recent discovery of the baryon acoustic peak in the Sloan Digital Sky Survey (Eisenstein et al, 2005) into our analysis. Our main results are that braneworld models satisfy both sets of SNe data. Brane 1 (with w_0 \leq -1) shows very good agreement with data for values of the matter density bounded {\em from below}: Ω_m \geq 0.25 (Gold) and $Ω_m \geq 0.2 (SNLS). On the other hand Brane 2 (with w_0 \geq -1) shows excellent agreement with data for values of the matter density which are bounded {\em from above}: Ω_m \leq 0.45 (Gold) and Ω_m \leq 0.35 (SNLS). The DGP model is excluded at 3σby SNLS and at 1σby the Gold dataset. Braneworld models with future `quiescent' singularities (at which the Hubble parameter and the matter density remain finite but higher derivatives of the expansion factor diverge) are excluded by both datasets.
description: 21 pages, 3 figures, latex. New figure and tables. Main results unchanged. Accepted for publication in Phys. Rev. D
Supergravity Microstates for BPS Black Holes and Black Rings
Creators: name: Berglund, Per
name: Gimon, Eric G.
name: Levi, Thomas S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate a solution generating technique, modulo some constraints, for a large class of smooth supergravity solutions with the same asymptotic charges as a five dimensional 3-charge BPS black hole or black ring, dual to a D1/D5/P system. These solutions are characterized by a harmonic function with both positive and negative poles, which induces a geometric transition whereby singular sources have disappeared and all of the net charge at infinity is sourced by fluxes through two-cycles joining the poles of the harmonic function.
description: 25 pages, 1 figure. Fixed minor typos, references added, extra comment on gauge choice