cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Topological strings and large N phase transitions I: Nonchiral expansion of q-deformed Yang-Mills theory
Creators: name: Caporaso, Nicola
name: Cirafici, Michele
name: Griguolo, Luca
name: Pasquetti, Sara
name: Seminara, Domenico
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine the problem of counting bound states of BPS black holes on local Calabi-Yau threefolds which are fibrations over a Riemann surface by computing the partition function of q-deformed Yang-Mills theory on the Riemann surface. We study in detail the genus zero case and obtain, at finite $N$, the instanton expansion of the gauge theory. It can be written exactly as the partition function for U(N) Chern-Simons gauge theory on a Lens space, summed over all non-trivial vacua, plus a tower of non-perturbative instanton contributions. The correspondence between two and three dimensional gauge theories is elucidated by an explicit mapping between two-dimensional Yang-Mills instantons and flat connections on the Lens space. In the large $N$ limit we find a peculiar phase structure in the model. At weak string coupling the theory reduces exactly to the trivial flat connection sector with instanton contributions exponentially suppressed, and the topological string partition function on the resolved conifold is reproduced in this regime. At a certain critical point all non-trivial vacua contribute, instantons are enhanced and the theory appears to undergo a phase transition into a strong coupling regime. We rederive these results by performing a saddle-point approximation to the exact partition function. We obtain a q-deformed version of the Douglas-Kazakov equation for two-dimensional Yang-Mills theory on the sphere, whose one-cut solution below the transition point reproduces the resolved conifold geometry. Above the critical point we propose a two-cut solution that should reproduce the chiral-antichiral dynamics found for black holes on the Calabi-Yau threefold and the Gross-Taylor string in the undeformed limit.
description: 68 pages, 4 figures, References added and typos corrected
The ERIЯƎ Theory: Rotational Coherence and Energy Quantization in Proton-Electron Interaction - A Computational Study
Creators: name: DanBrasilP
Publisher: name: Zenodo
Year: 2025
Subjects: ERIRE
Unified Physics
Rotational Coherence
Imaginary Planes
Quantum Geometry
Algebraic Physics
Energy Quantization
Proton-Electron Interaction
Geometric Projection
EIRE Transform
RIRE Operator
quantization
Coulomb force
hydrogen atom
computational physics
alternative electrodynamics
coherent field models

description: This work presents a novel interpretation of atomic interactions through the ERIЯƎ Theory (Exponentialization and Rationalization of Imaginary Rotational Evolution), focusing on the proton-electron system. The study explores how rotational coherence across multidimensional imaginary planes (i, j, k) gives rise to naturally quantized energy levels without invoking discrete postulates.

Two core simulations demonstrate how the ERIЯƎ framework reproduces key experimental data — including the hydrogen atom energy levels — through geometric phase alignment. The model proposes rotational projection as a foundational mechanism for both electromagnetic and gravitational interactions, offering a unified algebraic interpretation rooted in resonance and coherence.

Full code and symbolic models are available in the open-access repository:https://github.com/DanBrasilP/ERIRE
description: This study is part of a broader theoretical investigation spanning multiple expansions and annexes, each covering a different facet of the ERIЯƎ framework. For full details, see associated files and GitHub repository.
description: Este trabalho apresenta uma nova interpretação das interações atômicas por meio da Teoria ERIЯƎ (Exponencialização e Racionalização Imaginária Rotacional Evolutiva), com foco no sistema próton-elétron. A abordagem propõe que os níveis de energia observados surgem naturalmente da coerência rotacional em planos imaginários (i, j, k), sem necessidade de postulados discretos.

Através de duas simulações computacionais, a teoria demonstra que o comportamento quantizado dos átomos pode ser explicado por alinhamentos geométricos de fase, obtendo resultados que coincidem com dados experimentais conhecidos, como os níveis de energia do átomo de hidrogênio.

O modelo também sugere que a coerência rotacional pode unificar interações eletromagnéticas e gravitacionais sob uma estrutura algébrica comum, oferecendo uma nova base para a física teórica.

Todos os códigos e modelos simbólicos estão disponíveis no repositório aberto:🔗 https://github.com/DanBrasilP/ERIRE
Editorial
Creators: name: Silva, Maria João
Publisher: name: Da Investigação às Práticas: Estudos de Natureza Educacional
Year: 2021

description: Este primeiro número de 2021, da revista Da Investigação às Práticas: Estudos de Natureza Educacional, volta a ser criado, tal como o primeiro número de 2020, num período de confinamento, decretado devido à Pandemia COVID-19. Ilustra a continuação da Investigação em Educação e da publicação dos resultados da mesma.
description: Da Investigação às Práticas: Estudos de Natureza Educacional, v. 11, n. 1 (2021)
Risk Sharing and Incentives with External Equity Financing and Crop Insurance
Creators: name: Seo, Sangtaek
name: Mitchell, Paul D.
name: Leatham, David J.
name: Seo, Sangtaek
name: Mitchell, Paul D.
name: Leatham, David J.
Publisher: name: Unknown
Year: 2008
Subjects: Agribusiness

description: We develop a principal agent model to examine how the optimal contract between a farmer and an external equity investor is altered by the presence of crop insurance. The contract uses both fixed compensation and variable compensation varying with realized revenue to induce high farmer effort. All remaining surplus is divided between the farmer and investor. The optimal contract with crop insurance relies more on the variable compensation and less on the fixed compensation than when crop insurance is unavailable. This compensation scheme requires the investor to share more risk with the farmer to induce higher effort while still enticing the farmer’s participation in the contract. Empirical analysis finds that the variable compensation increase is not substantial, but the fixed compensation decrease ranges 1% to 73% depending on the acreage allocation between crops.
The nature and origin of Seyfert warm absorbers
Creators: name: Blustin, A. J.
name: Page, M. J.
name: Fuerst, S. V.
name: Branduardi-Raymont, G.
name: Ashton, C. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We collate the results of recent high resolution X-ray spectroscopic observations of 23 AGN, and use the resulting information to try to provide answers to some of the main open questions about warm absorbers: where do they originate, what effect do they have on their host galaxies, and what is their importance within the energetics and dynamics of the AGN system as a whole? We find that the warm absorbers of nearby Seyferts and certain QSOs are most likely to originate in outflows from the dusty torus, and that the kinetic luminosity of these outflows accounts for well under 1% of the bolometric luminosities of the AGN. Our analysis supports, however, the view that the relativistic outflows recently observed in two PG quasars have their origin in accretion disc winds, although the energetic importance of these outflows is similar to that of the Seyfert warm absorbers. We find that the observed soft X-ray absorbing ionisation phases fill less than 10% of the available volume. Finally, we show that the amount of matter processed through an AGN outflow system, over the lifetime of the AGN, is probably large enough to have a significant influence on the evolution of the host galaxy and of the AGN itself.
description: v2: 15 pages, 9 figures, accepted for publication in A&A, minor typos corrected
Erhaltungsgrad unterschiedlich intensiv bewirtschafteter Berg-Mähwiesen (LRT 6520) am Beispiel der Nockberge
Creators: name: Janisch, Julian
Publisher: name: Zenodo
Year: 2024
Subjects: subject: HT6520
subject: mountain hay meadows
subject: vegetation science
subject: Nature conservation
subject: landscape planning
subject: Biosphere reserve
subject: Land use
subject: Property rights

description: Mountain hay meadows (HT 6520, MHM) represent a crucial habitat type across Europe, yet they suffer from poor ecological conditions, partly due to vague descriptions in European Commission manuals, resulting in significant national disparities in identification approaches. Addressing the current ecological value requires a better understanding of the nexus between location, management practices, and conservation status. This study aims to bridge this knowledge gap by investigating different management strategies and intensities employed in mountain hay meadows, considering their contextual factors. Conducting vegetation surveys and farm mapping within the Nockberge Biosphere Reserve (Carinthia), this research proofs that an extensive mowing regime, involving one to three cuts annually along with fertilization using farmyard manure, fosters a favourable conservation status for MHM in the study area. Notably, these meadows constitute challenging-to-manage subareas within a broader meadow complex. Nevertheless, their successful conservation underlines the important role of fertilizer input, highlighting its significance for the preservation of HT6520. The findings show that there is no universally applicable management strategy conducive to HT6520 conservation. Instead, tailored approaches, accounting for specific growth patterns and soil conditions of individual meadows, are imperative. Vegetation surveys indicate the prevalence of smooth oat grass meadows (HT6510) below an altitude of 1200 meters, with gold oat grass meadows (HT6520) emerging solely above 1300 meters. Furthermore, the designation and classification of HT6520's conservation status reveal partial applicability of national reference works pertinent to Austria, highlighting practical challenges in conservation efforts.
Inefficient magnetic-field amplification in supersonic laser-plasma turbulence
Creators: name: Bott, A. F. A.
name: Chen, L.
name: Boutoux, G.
name: Caillaud, T.
name: Duval, A.
name: Koenig, M.
name: Khiar, B.
name: Lantuéjoul, I.
name: Le-Deroff, L.
name: Reville, B.
name: Rosch, R.
name: Ryu, D.
name: Spindloe, C.
name: Vauzour, B.
name: Villette, B.
name: Schekochihin, A. A.
name: Lamb, D. Q.
name: Tzeferacos, P.
name: Gregori, G.
name: Casner, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report a laser-plasma experiment that was carried out at the LMJ-PETAL facility and realized the first magnetized, turbulent, supersonic plasma with a large magnetic Reynolds number ($\mathrm{Rm} \approx 45$) in the laboratory. Initial seed magnetic fields were amplified, but only moderately so, and did not become dynamically significant. A notable absence of magnetic energy at scales smaller than the outer scale of the turbulent cascade was also observed. Our results support the notion that moderately supersonic, low-magnetic-Prandtl-number plasma turbulence is inefficient at amplifying magnetic fields.
description: 6 pages, 4 figures; supplemental information included (14 pages, 10 figures)
The Productivity Effects of Extension Appointments in Land Grant Colleges
Creators: name: Foltz, Jeremy D.
name: Barham, Bradford L.
name: Foltz, Jeremy D.
name: Barham, Bradford L.
Publisher: name: Unknown
Year: 2008
Subjects: Teaching/Communication/Extension/Profession

description: A key piece in understanding the link between the extension and research missions of Land Grant universities is to understand the role of faculty with (and without) extension appointments within agricultural colleges. This article provides a comparative empirical portrayal of the primary activities of agricultural college faculty, and demonstrates the basic vitality of extension professors within the Land Grant system. Professors with smaller extension appointments are heavily engaged in the major research efforts of their universities at even greater levels of production than professors without extension responsibilities. Professors with heavy levels of extension appointments experience increasing tradeoffs between core extension activities and research outputs and graduate training. Professors with no extension appointments engage substantively in extension activities and frequently have links to core extension clientele.
5,6-dihydroxyindole-2-carboxylic acid (DHICA): a First Principles Density-Functional Study
Creators: name: Powell, B. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Biomolecules (q-bio.BM)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We report first principles density functional calculations for 5,6-dihydroxyindole-2-carboxylic acid (DHICA) and several reduced forms. DHICA and 5,6-dihydroxyindole (DHI) are believed to be the basic building blocks of the eumelanins. Our results show that carboxylation has a significant effect on the physical properties of the molecules. In particular, the relative stabilities and the HOMO-LUMO gaps (calculated with the $Δ$SCF method) of the various redox forms are strongly affected. We predict that, in contrast to DHI, the density of unpaired electrons, and hence the ESR signal, in DHICA is negligibly small.
description: 5 pages, 2 figures
The Rise of China and India and the Commodity Boom: Economic and Environmental Implications for Low-Income Countries
Creators: name: Coxhead, Ian A.
name: Jayasuriya, Sisira
name: Coxhead, Ian A.
name: Jayasuriya, Sisira
Publisher: name: Unknown
Year: 2008
Subjects: Environmental Economics and Policy
International Development

description: The rapid growth of China and, more recently, of India, is having major effects on every facet of the global economy. The supply of labor-intensive manufactured exports (from China in particular) has been accompanied by a huge expansion in their imports both of raw materials and of skill-intensive manufactured parts and components. This ‘offshoring’ of intermediates production by large, labor-abundant economies has economic and environmental implications for other developing economies drawn into their trade networks. We sketch a trade-theoretic model showing how the growth of the ‘giants’ generates adjustment pressures on their trading partners and competitors among developing economies. We discuss in particular how differences in relative factor endowments of resource-rich economies can produce quite different outcomes in the context of product fragmentation and expanding commodity trade. We also explore the effects on production, trade, environment and prospects for future growth, recognizing that commodity extraction and production can have strong environmental impacts, particularly in the context of weak institutions and other market failures. We illustrate these different impacts by considering the cases of Indonesia, Malaysia and Thailand and highlight implications for growth, development and policy.
O «risco da diversidade linguística» no comércio jurídico internacional - um caso luso-alemão
Creators: name: Schwarz, Eckhard
name: Coelho, Eduardo De Melo Lucas
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 3 n. Especial (1989): Volume de homenagem ao Prof. Doutor Manuel Gonçalves Cavaleiro de Ferreira
Orbital effects in solids: basics, recent progress and opportunities
Creators: name: Khomskii, D. I.
name: Streltsov, S. V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The properties of transition metal compounds are largely determined by nontrivial interplay of different degrees of freedom: charge, spin, lattice, but also orbital ones. Especially rich and interesting effects occur in systems with orbital degeneracy. They result in the famous Jahn-Teller effect leading to a plethora of consequences, in static and in dynamic properties, including nontrivial quantum effects. In the present review we discuss the main phenomena in the physics of such systems, paying central attention to the novel manifestations of those. After shortly summarising the basic phenomena and their description, we concentrate on several specific directions in this field. One of them is the reduction of effective dimensionality in many systems with orbital degrees of freedom due to directional character of orbitals, with concomitant appearance of some instabilities leading in particular to the formation of dimers, trimers and similar clusters in a material. The properties of such cluster systems, largely determined by their orbital structure, are discussed in detail, and many specific examples of those in different materials are presented. Another big field which acquired special significance relatively recently is the role of relativistic spin-orbit interaction. The mutual influence of this interaction and the more traditional Jahn-Teller physics is treated in details in the second part of the review. In discussing all these questions special attention is paid to novel quantum effects in those.
description: published in Chemical Reviews
Squared-field amplitude modulus and radiation intensity nonequivalence within nonlinear slabs
Creators: name: Lencina, Alberto
name: Vaveliuk, Pablo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This paper presents a novel approach to wave propagation inside the Fabry-Perot framework. It states that the time-averaged Poynting vector modulus could be nonequivalent with the squared-field amplitude modulus. This fact permits the introduction of a new kind of nonlinear medium whose nonlinearity is proportional to the time-averaged Poynting vector modulus. Its transmittance is calculated and found to differ with that obtained for the Kerr medium, whose nonlinearity is proportional to the squared-field amplitude modulus. The latter emphasizes the nonequivalence of these magnitudes. A space-time symmetry analysis shows that the Poynting nonlinearity should be only possible in noncentrosymmetric materials.
description: 5 pages, 4 figures, added space-time symmetry analysis and references
Line and Word Matching in Old Documents
Creators: name: Marcolino, A.
name: Ramos, Vitorino
name: Ramalho, Mario
name: Pinto, J. R. Caldas
Publisher: name: arXiv
Year: 2004
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences
subject: I.2; I.5

description: This paper is concerned with the problem of establishing an index based on word matching. It is assumed that the book was digitised as better as possible and some pre-processing techniques were already applied as line orientation correction and some noise removal. However two main factor are responsible for being not possible to apply ordinary optical character recognition techniques (OCR): the presence of antique fonts and the degraded state of many characters due to unrecoverable original time degradation. In this paper we make a short introduction to word segmentation that involves finding the lines that characterise a word. After we discuss different approaches for word matching and how they can be combined to obtain an ordered list for candidate words for the matching. This discussion will be illustrated by examples.
description: 12 pages, 7 figures, Author at http://alfa.ist.utl.pt/~cvrm/staff/vramos/ref_32.html
O conceito de lei na Constituição Portuguesa - uma perspectiva de reflexão
Creators: name: Vaz, Manuel Afonso
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 3 n. Especial (1989): Volume de homenagem ao Prof. Doutor Manuel Gonçalves Cavaleiro de Ferreira
An Analysis of Bundle Pricing: The Case of the Corn Seed Market
Creators: name: Shi, Guanming
name: Chavas, Jean-Paul
name: Stiegert, Kyle W.
name: Shi, Guanming
name: Chavas, Jean-Paul
name: Stiegert, Kyle W.
Publisher: name: Unknown
Year: 2008
Subjects: Agribusiness
Demand and Price Analysis

description: This paper investigates bundle pricing under imperfect competition. In a multiproduct context, we first examine how substitution/complementarity relationships among products can affect pricing. This is used to motivate multi-product generalizations of the Herfindahl-Hirschmann index (GHHI) capturing cross-market effects of imperfect competition on bundle pricing. The GHHI model is applied to pricing of conventional and patented biotech seeds in the US from 2000-2007. One major finding is that standard component pricing in biotech traits is soundly rejected in favor of sub-additive bundle pricing. This result is consistent with the presence of scope economies in the production of genetic traits. The econometric estimates show how changes in market structures (as measured by both own- and cross-Herfindal indexes) affect U.S. corn seed prices.
Carbohydrate-bearing ligands for biologically active metal ions
Creators: name: Green, David
Publisher: name: University of British Columbia
Year: 2009

description: Two distinct projects involving carbohydrates in bioinorganic chemistry are discussed in this thesis. In one study, several gallium and indium complexes with pendant carbohydrates were prepared and examined for potential use in radiopharmaceutical applications. Carbohydrate-bearing 3-hydroxy-4-pyridinone ligand precursors and their tris(ligand)gallium(III) and indium(III) complexes were synthesized and characterized by mass spectrometry, elemental analysis, ]H and l 3C NMR spectroscopy, and in the case of one intermediate, by X-ray crystallography. With three equivalents of ligand, neutral complexes formed with the pyridinone moiety (as expected) complexing the gallium(III) and indium(III) metal centers. In the other study, a series of 3-hydroxy-4-pyridinones and their glycoside pro-drugs (pyridinone glycosides) were prepared and studied. The pyridinones have the potential to be used in metal chelation therapy to aid in the treatment of neurodegenerative disorders such as Alzheimer's disease. The pyridinone glycosides were synthesized via a Mitsunobu coupling and characterized by mass spectrometry, elemental analysis, !H and 1 3C NMR spectroscopy, and in one case by X-ray crystallography. The glycoside pro-drugs mask the metal chelation portion of the pyridinones by protecting the 3- hydroxy position. The glycosidic cleavage of the pyridinone glycosides was studied (and kinetic parameters determined for one compound) with Agrobacterium sp. P-glucosidase. This enzyme cleaves the pyridinone glycosides unmasking the pyridinones and making them available for metal chelation. A series of the 3-hydroxy-4-pyridinones also displayed significant antioxidant protection in a radical quenching assay.
More on nucleon-nucleon cross sections in symmetric and asymmetric matter
Creators: name: Sammarruca, F.
name: Krastev, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Following a recent work, we present numerical results for total two-nucleon effective cross sections in isospin symmetric and asymmetric matter. The present calculations include the additional effect of Pauli blocking of the final states.
description: 9 pages, no figures, 5 tables
Fast degradation of the circular flare ribbon on 2014 August 24
Creators: name: Zhang, Q. M.
name: Yang, S. H.
name: Li, T.
name: Hou, Y. J.
name: Li, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The separation and elongation motions of solar flare ribbons have extensively been investigated. The degradation and disappearance of ribbons have rarely been explored. In this paper, we report our multiwavelength observations of a C5.5 circular-ribbon flare associated with two jets (jet1 and jet2) on 2014 August 24, focusing on the fast degradation of the outer circular ribbon (CR). The flare, consisting of a short inner ribbon (IR) and outer CR, was triggered by the eruption of a minifilament. The brightness of IR and outer CR reached their maxima simultaneously at $\sim$04:58 UT in all AIA wavelengths. Subsequently, the short eastern part of CR faded out quickly in 1600 Å but gradually in EUV wavelengths. The long western part of CR degraded in the counterclockwise direction and experienced a deceleration. The degradation was distinctly divided into two phases: phase I with faster apparent speeds (58$-$69 km s$^{-1}$) and phase II with slower apparent speeds (29$-$35 km s$^{-1}$). The second phase stopped at $\sim$05:10 UT when the western CR totally disappeared. Besides the outward propagation of jet1, the jet spire experienced untwisting motion in the counterclockwise direction during 04:55$-$05:00 UT. We conclude that the event can be explained by the breakout jet model. The coherent brightenings of the IR and CR at $\sim$04:58 UT may result from the impulsive interchange reconnection near the null point, whereas sub-Alfvénic slipping motion of the western CR in the counterclockwise direction indicates the occurrence of slipping magnetic reconnection. Another possible explanation of the quick disappearance of the hot loops connecting to the western CR is that they are simply reconnected sequentially without the need for significant slippage after the null point reconnection.
description: 4 pages, 5 figures, accepted for publication in A&A Letters
Insights into coumarin-mediated inhibition of biofilm formation in Salmonella Typhimurium
Creators: name: Samriddhi Thakur
name: Semanti Ray
name: Siddharth Jhunjhunwala
name: Nandi, Dipankar
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Coumarins have been shown to possess antimicrobial, anti-quorum sensing and anti-biofilm properties against a wide range of pathogenic bacteria. This study aimed to shed light on the effects of non-substituted coumarin on biofilm formation by the foodborne pathogen Salmonella Typhimurium. Additionally, its efficacy was tested in combination with another potent anti-biofilm agent, resveratrol. Coumarin inhibited biofilm formation for prolonged periods in millimolar concentrations with marginal effects on planktonic growth. It attenuated curli and cellulose production, likely by downregulating the transcript levels of major biofilm formation genes csgD, csgA and adrA. Coumarin further restricted motility in a dose-dependent manner. In addition, coumarin with resveratrol exhibited improved anti-biofilm properties compared with the individual compounds alone. Thus, coumarin alone or with resveratrol can be employed for inhibiting biofilms in food storage and processing units.
The Effects of Aquatic Invasive Species on Property Values: Evidence from a Quasi-Random Experiment
Creators: name: Horsch, Eric J.
name: Lewis, David J.
name: Horsch, Eric J.
name: Lewis, David J.
Publisher: name: Unknown
Year: 2008
Subjects: Environmental Economics and Policy

description: This study uses hedonic analysis to estimate the effects of a common aquatic invasive species – Eurasian Watermilfoil (milfoil) – on property values across an extensive system of over 170 lakes in the northern forest region of Wisconsin. Since milfoil is inadvertently spread by recreational boaters, and since boaters are more likely to visit attractive lakes, variables indicating the presence of milfoil are endogenous in a hedonic model. Using an identification strategy based on a spatial difference-in-differences specification, results indicate that lakes invaded with milfoil experienced an average 13% decrease in land values after invasion.
Dynamic response of trapped ultracold bosons on optical lattices
Creators: name: Batrouni, G. G.
name: Assaad, F. F.
name: Scalettar, R. T.
name: Denteneer, P. J. H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the dynamic response of ultracold bosons trapped in one-dimensional optical lattices using Quantum Monte Carlo simulations of the boson Hubbard model with a confining potential. The dynamic structure factor reveals the inhomogeneous nature of the low temperature state, which contains coexisting Mott insulator and superfluid regions. We present new evidence for local quantum criticality and shed new light on the experimental excitation spectrum of 87Rb atoms confined in one dimension.
description: 4 pages, 5 figures
Convergence acceleration of series through a variational approach
Creators: name: Amore, Paolo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: By means of a variational approach we find new series representations both for well known mathematical constants, such as $π$ and the Catalan constant, and for mathematical functions, such as the Riemann zeta function. The series that we have found are all exponentially convergent and provide quite useful analytical approximations. With limited effort our method can be applied to obtain similar exponentially convergent series for a large class of mathematical functions.
description: 19 pages, 9 figures, 1 table Accepted for publication on the Journal of Mathematical Analysis and Applications
பரிபாடலில் மதுரை மாநகரம்
Creators: name: Kala, Sree
Publisher: name: figshare
Year: 2020
Subjects: subject: 200315 Indian Languages
subject: FOS: Languages and literature
subject: 200520 Indian Literature

description: ஓங்கு பரிபாடல் என்னும் பெருமைமிக்க ப்பரிபாடலானது மதுரை மாநகர செய்திகளை எடுத்தியம்புகிறது மதுரையைத தென்னவனின் நான்மாடக்கூடல் என்கிறார் ஆசிரியர் மதுரைக்கு பெருமை சேர்க்கும் வையை வையையில் கொண்டாடப்படும் நீரணிவிழா பற்றியும் விவரிக்கப்பட்டுள்ளன மதுரையில் பிறந்து வையை நீராடும் பெண்கள் பிறவிதோறும் மதுரையில் பிறந்துவையையில் ஆடி மகிழும் பேறு கிடைக்க வேண்டும் தெய்வத்தை வேண்டுவர்
Targeting Incentives to Reduce Habitat Fragmentation
Creators: name: Lewis, David J.
name: Plantinga, Andrew J.
name: Wu, JunJie
name: Lewis, David J.
name: Plantinga, Andrew J.
name: Wu, JunJie
Publisher: name: Unknown
Year: 2008
Subjects: Environmental Economics and Policy

description: This paper develops a theoretical model to analyze the spatial targeting of incentives for the restoration of forested landscapes when wildlife habitat can be enhanced by reducing fragmentation. The key theoretical result is that the marginal net benefits of increasing forest are convex, indicating that corner solutions – converting either none or all of the agricultural land in a section to forest – may be optimal. Corner solutions are directly linked to the spatial process determining habitat benefits and the regulator’s incomplete information regarding landowner opportunity costs. We present findings from a large-scale empirical landscape simulation that supports our key theoretical results.
A survey on discrete Laplacians for general polygonal meshes
Creators: name: Bunge, Astrid
name: Botsch, Mario
Publisher: name: TU Dortmund
Year: 2023
Subjects: subject: 004

description: The Laplace Beltrami operator is one of the essential tools in geometric processing. It allows us to solve numerous partial differential equations on discrete surface meshes, which is a fundamental building block in many computer graphics applications. Discrete Laplacians are typically limited to standard elements like triangles or quadrilaterals, which severely constrains the tessellation of the mesh. But in recent years, several approaches were able to generalize the Laplace Beltrami and its closely related gradient and divergence operators to more general meshes. This allows artists and engineers to work with a wider range of elements which are sometimes required and beneficial in their field. This paper discusses the different constructions of these three ubiquitous differential operators on arbitrary polygons and analyzes their individual advantages and properties in common computer graphics applications.
description: Computer graphics forum; 42(2)
Demo7 - Bryld, Schønrock, Løvlie, Barkhuus
Creators: name: Bryld, Jannik
Publisher: name: figshare
Year: 2020
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology
subject: Information Systems
subject: FOS: Computer and information sciences

description: Demo 7
Title: Watching Together but Apart: Shared Video Experiences During COVID-19 Outbreak
Authors: Jannik Munk Bryld, Lucas Schønrock, Anders Sundnes Løvlie, Louise Barkhuus
title: Great Britain Ministry of Information - Daily Press Notices and Bulletins (1944-03-30)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: subject: World War, 1939-1945 – Social aspects
subject: World War, 1939-1945 -- History
subject: World War II
subject: Second World War
subject: World War Two
subject: Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Princípios gerais do processo penal e Constituição da República Portuguesa
Creators: name: Marques Da Silva, Germano
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 3 n. Especial (1989): Volume de homenagem ao Prof. Doutor Manuel Gonçalves Cavaleiro de Ferreira
An Economic Framework for Forecasting Land-Use and Ecosystem Change
Creators: name: Lewis, David J.
name: Lewis, David J.
Publisher: name: Unknown
Year: 2009
Subjects: Environmental Economics and Policy
Research Methods/ Statistical Methods

description: This paper develops a joint econometric-simulation framework to forecast detailed empirical distributions of the spatial pattern of land-use and ecosystem change. In-sample and out-of-sample forecasting tests are used to examine the performance of the parcel-scale econometric and simulation models, and the importance of multiple forecasting challenges is assessed. The econometric-simulation method is integrated with an ecological model to generate forecasts of the probability of localized extinctions of an amphibian species. The paper demonstrates the potential of integrating economic and ecological models to generate ecological forecasts in the presence of alternative market conditions and land-use policy constraints.
Efficient Approximate Minimum Entropy Coupling of Multiple Probability Distributions
Creators: name: Li, Cheuk Ting
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Given a collection of probability distributions $p_{1},\ldots,p_{m}$, the minimum entropy coupling is the coupling $X_{1},\ldots,X_{m}$ ($X_{i}\sim p_{i}$) with the smallest entropy $H(X_{1},\ldots,X_{m})$. While this problem is known to be NP-hard, we present an efficient algorithm for computing a coupling with entropy within 2 bits from the optimal value. More precisely, we construct a coupling with entropy within 2 bits from the entropy of the greatest lower bound of $p_{1},\ldots,p_{m}$ with respect to majorization. This construction is also valid when the collection of distributions is infinite, and when the supports of the distributions are infinite. Potential applications of our results include random number generation, entropic causal inference, and functional representation of random variables.
description: 13 pages, 1 figure, 1 table
The Efficiency of Voluntary Incentive Policies for Preventing Biodiversity Loss
Creators: name: Lewis, David J.
name: Plantinga, Andrew J.
name: Nelson, Erik
name: Polasky, Stephen
name: Lewis, David J.
name: Plantinga, Andrew J.
name: Nelson, Erik
name: Polasky, Stephen
Publisher: name: Unknown
Year: 2009
Subjects: Environmental Economics and Policy
Land Economics/Use

description: In this paper we analyze the efficiency of voluntary incentive-based land-use policies for biodiversity conservation. Two factors combine to make it difficult to achieve an efficient result. First, the spatial pattern of habitat across multiple landowners is important for determining biodiversity conservation results. Second, the willingness of private landowners to accept a payment in exchange for enrolling in a conservation program is private information. Therefore, a conservation agency cannot easily control the spatial pattern of voluntary enrollment in conservation programs. We begin by showing how the distribution of a landowner’s willingness to accept a conservation payment can be derived from a parcel-scale land-use change model. Next we combine the econometric land-use model with spatial data and ecological models to simulate the effects of various conservation program designs on biodiversity conservation outcomes. We compare these results to an estimate of the efficiency frontier that maximizes biodiversity conservation at each level of cost. The frontier mimics the regulator’s solution to the biodiversity conservation problem when she has perfect information on landowner willingness-to-accept. Results indicate that there are substantial differences in biodiversity conservation scores generated by the incentive-based policies and efficient solutions. The performance of incentive-based policies is particularly poor at low levels of the conservation budget where spatial fragmentation of conserved parcels is a large concern. Performance can be improved by encouraging agglomeration of conserved habitat and by incorporating basic biological information, such as that on rare habitats, into the selection criteria.
Impact of a course transformation on students' reasoning about measurement uncertainty
Creators: name: Pollard, Benjamin
name: Werth, Alexandra
name: Hobbs, Robert
name: Lewandowski, H. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: Physics lab courses are integral parts of an undergraduate physics education, and offer a variety of opportunities for learning. Many of these opportunities center around a common learning goal in introductory physics lab courses: measurement uncertainty. Accordingly, when the stand-alone introductory lab course at the University of Colorado Boulder (CU) was recently transformed, measurement uncertainty was the focus of a learning goal of that transformation. The Physics Measurement Questionnaire (PMQ), a research-based assessment of student understanding around statistical measurement uncertainty, was used to measure the effectiveness of that transformation. Here, we analyze student responses to the PMQ at the beginning and end of the CU course. We also compare such responses from two semesters: one before and one after the transformation. We present evidence that students in both semesters shifted their reasoning in ways aligned with the measurement uncertainty learning goal. Furthermore, we show that more students in the transformed semester shifted in ways aligned with the learning goal, and that those students tended to communicate their reasoning with greater sophistication than students in the original course. These findings provide evidence that even a traditional lab course can support valuable learning, and that transforming such a course to align with well-defined learning goals can result in even more effective learning experiences.
Loss of memory and moment bounds for nonstationary intermittent dynamical systems
Creators: name: Korepanov, Alexey
name: Leppänen, Juho
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We study nonstationary intermittent dynamical systems, such as compositions of a (deterministic) sequence of Pomeau-Manneville maps. We prove two main results: sharp bounds on memory loss, including the "unexpected" faster rate for a large class of measures, and sharp moment bounds for Birkhoff sums and, more generally, "separately Hölder" observables.
description: 28 pages. v2: Incorporated referee suggestions. To appear in Communications in Mathematical Physics
Energy dependence of the inelasticity in $pp/p\bar{p}$ collisions from experimental information on charged particle multiplicity distributions
Creators: name: Beggio, P. C.
name: Coriolano, F. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The dependence of the inelasticity in terms of the center of mass energy is studied in the eikonal formalism, which provides connection between elastic and inelastic channels. Due to the absence of inelasticity experimental datasets, the present analysis is based on experimental information available on the full phase space multiplicity distribution covering a large range of energy, namely 30 $
The phase of the sigma -> pi-pi amplitude in J/Psi -> omega-pi-pi
Creators: name: Bugg, D. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The phase variation of the sigma -> pi-pi amplitude is accurately determined as a function of mass from BES II data for J/Psi -> omega-pi-pi. The determination arises from interference with the strong b1(1235)-pi amplitude. The observed phase variation agrees within errors with that in pi-pi elastic scattering.
description: 10 pages, 4 figures, Euro. Phys. J C (in press)
Industry 1 - Darnell and Yang
Creators: name: Mike Darnell,
Publisher: name: figshare
Year: 2020
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology
subject: Information Systems
subject: FOS: Computer and information sciences

description: IMX in Industry 1.
People Generally Know In Advance Exactly What They Want To Watch on TV
Authors: Mike Darnell and Xiao Yang
title: Great Britain Ministry of Information - Daily Press Notices and Bulletins (1944-03-31)
Creators: name: Great Britain. Ministry Of Information.
Publisher: name: The University of Texas at Austin
Year: 1944
Subjects: subject: World War, 1939-1945 – Social aspects
subject: World War, 1939-1945 -- History
subject: World War II
subject: Second World War
subject: World War Two
subject: Great Britain

description: From the UK National Archives: http://www.nationalarchives.gov.uk/theartofwar/inf3.htm “Formed on September 4th 1939, the day after Britain’s declaration of war, the Ministry of Information (MOI) was the central government department responsible for publicity and propaganda in the Second World War. The initial functions of the MOI were threefold: news and press censorship; home publicity; and oversees publicity in Allied and neutral countries”. This collection contains Press Notices and Bulletins published by the MOI between 1939-1945. The Press Notices and Bulletins are among many publications and films issued by the agency during the war.
Garantia de emprego e crise económica. Contributo ensaístico para um novo conceito
Creators: name: Pinto, Mário F. C.
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 3 n. Especial (1989): Volume de homenagem ao Prof. Doutor Manuel Gonçalves Cavaleiro de Ferreira
X-ray photolysis of CH$_3$COCH$_3$ ice: Implications for the radiation effects of compact objects towards astrophysical ices
Creators: name: Carvalho, G. A.
name: Pilling, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: In this study, we employed broadband X-rays ($6-2000$ eV) to irradiate the frozen acetone CH$_3$COCH$_3$, at the temperature of 12 K, with different photon fluences up to $2.7\times 10^{18}$ photons cm$^{-2}$. Here, we consider acetone as a representative complex organic molecule (COM) present on interstellar ice grains. The experiments were conduced at the Brazilian synchrotron facility (LNLS/CNPEN) employing infrared spectroscopy (FTIR) to monitor chemical changes induced by radiation in the ice sample. We determined the effective destruction cross-section of the acetone molecule and the effective formation cross-section for daughter species. Chemical equilibrium, obtained for fluence $2\times 10^{18}$ photons cm$^{-2}$, and molecular abundances at this stage were determined, which also includes the estimates for the abundance of unknown molecules, produced but not detected, in the ice. Timescales for ices, at hypothetical snow line distances, to reach chemical equilibrium around several compact and main-sequence X-ray sources are given. We estimate timescales of 18 days, 3.6 and 1.8 months, $1.4\times 10^9-6\times 10^{11}$ years, 600 and $1.2\times 10^7$ years, and $10^7$ years, for the Sun at 5 AU, for O/B stars at 5 AU, for white dwarfs at 1 LY, for the Crab pulsar at 2.25 LY, for Vela pulsar at 2.25 LY, and for Sagittarius A* at 3 LY, respectively. This study improves our current understanding about radiation effects on the chemistry of frozen material, in particular, focusing for the first time, the effects of X-rays produced by compact objects in their eventual surrounding ices.
description: Accepted in MNRAS. This is a preprint. 14 pages, 7 figures
O princípio no tratamento mais favorável no direito do trabalho actual
Creators: name: Cordeiro, António Menezes
Publisher: name: Direito e Justiça
Year: 2021

description: Direito e Justiça, v. 3 n. Especial (1989): Volume de homenagem ao Prof. Doutor Manuel Gonçalves Cavaleiro de Ferreira
Anisotropy in Rupture Lines of Paper Sheets
Creators: name: Menezes-Sobrinho, I. L.
name: Couto, M. S.
name: Ribeiro, I. R. B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We have experimentally investigated the fracture process in paper samples submitted to a uniaxial force. Five types of paper sheets (newsprint, towel, sulfite, silk and couche papers) were fractured along two orthogonal orientations. In order to characterize the rupture lines of the paper sheets we utilized the Hurst exponent. Our results indicate a dependence of the Hurst exponent on the orientation of the paper sheets for samples of newsprint and, probably, towel and silk papers. For the other types of paper the Hurst exponent does not depend on the direction of crack propagation.
description: 6 pages, 4 figures