cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tracking Social Media Discourse About the COVID-19 Pandemic: Development of a Public Coronavirus Twitter Data Set
Creators: name: Chen, Emily
name: Lerman, Kristina
name: Ferrara, Emilio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: At the time of this writing, the novel coronavirus (COVID-19) pandemic outbreak has already put tremendous strain on many countries' citizens, resources and economies around the world. Social distancing measures, travel bans, self-quarantines, and business closures are changing the very fabric of societies worldwide. With people forced out of public spaces, much conversation about these phenomena now occurs online, e.g., on social media platforms like Twitter. In this paper, we describe a multilingual coronavirus (COVID-19) Twitter dataset that we have been continuously collecting since January 22, 2020. We are making our dataset available to the research community (https://github.com/echen102/COVID-19-TweetIDs). It is our hope that our contribution will enable the study of online conversation dynamics in the context of a planetary-scale epidemic outbreak of unprecedented proportions and implications. This dataset could also help track scientific coronavirus misinformation and unverified rumors, or enable the understanding of fear and panic -- and undoubtedly more. Ultimately, this dataset may contribute towards enabling informed solutions and prescribing targeted policy interventions to fight this global crisis.
title: Home safety resources for older people
Creators: name: Home Modification Information Clearinghouse
Publisher: name: Home Modification Information Clearinghouse
Year: 2021

description: Tools and checklists about home safety can be used to improve the life of older people. Common hazards in the home are floor mats or rugs that are not level, slippery floors, poorly lit spaces, cables under rugs, smoke alarms that have not been checked or replaced for a long time, etc. Slips and falls and home fires are the most common results of these home issues which can have dangerous or even fatal consequences for older people. If you are an older person or caring for an older person and you are concerned about your/their safety in the home, there are checklists that can help you identify hazardous elements and guides with recommendations on how to mitigate the risks
description: Home safety checklists Guides for improving home safety Where can I find more information?
Additional file 1 of Favorable response to pembrolizumab after durvalumab failure in a stage III sarcomatoid carcinoma of the lung: a case report
Creators: name: Nishino, Kazumi
name: Kunimasa, Kei
name: Kimura, Madoka
name: Inoue, Takako
name: Tamiya, Motohiro
name: Kuhara, Hanako
name: Kumagai, Toru
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Cancer

description: Additional file 1. Supplementary methods of Fig. 2 The methods of Immunofluorescence analysis of PD-L1 and PD-L2 expression.
Additional file 2 of How can we support best practice? A situational assessment of injury prevention practice in public health
Creators: name: Richmond, Sarah A.
name: Carsley, Sarah
name: Prowse, Rachel
name: Manson, Heather
name: Moloughney, Brent
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2: Table 2. Consolidated criteria for reporting qualitative studies (COREQ) checklist1.
Gravitational Interactions and Neutrino Masses
Creators: name: Davoudiasl, Hooman
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We describe a scenario where the smallness of neutrino masses is related to a global symmetry that is only violated by quantum gravitational effects. The coupling of neutrinos to gauge singlet right-handed fermions is attributed to symmetry preserving gravitational operators suppressed by the Planck mass, in this framework. The proposed scenario leads to axion particles that decay into neutrinos, which could be probed through cosmological measurements and may help explain the Hubble parameter tension. Depending on the details of the implementation, the scenario could provide axion dark matter candidates.
description: 7 pages, 3 figures. This version, accepted for publication in Physical Review D, includes clarifying comments regarding Eq.(14), which has been made more accurate; typo in Eq.(23) corrected. Numerical results and figures have been updated to reflect changes
The entanglement properties of holographic QCD model with a critical end point
Creators: name: Li, Zhibin
name: Xu, Kun
name: Huang, Mei
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate different entanglement properties of a holographic QCD (hQCD) model with a critical end point at finite baryon density. Firstly we consider the holographic entanglement entropy (HEE) of this hQCD model in a spherical shaped region and a strip shaped region, respectively, and find that the HEE of this hQCD model in both regions can reflect QCD phase transition. What is more is that although the area formulas and minimal area equations of the two regions are quite different, the HEE have very similar behavior on the QCD phase diagram. So we argue that the behavior of HEE on the QCD phase diagram is independent of the shape of subregions. However, as we know that HEE is not a good quantity to characterize the entanglement between different subregions of a thermal system. So we then study the mutual information (MI), conditional mutual information (CMI) and the entanglement of purification (Ep) in different strip shaped regions. We find that the three entanglement quantities have very similar behavior: their values do not change so much in the hadronic matter phase and then rise up quickly with the increase of $T$ and $\m$ in the QGP phase. Near the phase boundary, these three entanglement quantities change smoothly in the crossover region, continuously but not smoothly at CEP and show discontinuity behavior in the first phase transition region. And all of them can be used to distinguish different phases of strongly coupled matter.
description: 18 pages, 14 figures
Fifth Force and Hyperfine Splitting in Bound Systems
Creators: name: Jentschura, Ulrich D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Two recent experimental observations at the ATOMKI Institute of the Hungarian Academy of Sciences (regarding the angular emission pattern of electron-positron pairs from nuclear transitions from excited states in 8Be and 4He) indicate the possible existence of a particle of a rest mass energy of roughly 17 MeV. The so-called X17 particle constitutes a virtual state in the process, preceding the emission of the electron-positron pair. Based on the symmetry of the nuclear transitions ($1^+$ to $0^+$ and $0^-$ to $0^+$), the X17 could either be a vector, or a pseudoscalar particle. Here, we calculate the effective potentials generated by the X17, for hyperfine interactions in simple atomic systems, for both the pseudoscalar as well as the vector X17 hypotheses. The effective Hamiltonians are obtained in a general form which is applicable to both electronic as well as muonic bound systems. The effect of virtual annihilation and its contribution to the hyperfine splitting also is considered. Because of the short range of the X17-generated potentials, the most promising pathway for the observation of the X17-mediated effects in bound systems concerns hyperfine interactions, which, for $S$ states, are given by modifications of short-range (Dirac-delta) potentials in coordinate space. For the pseudoscalar hypothesis, the exchange of one virtual X17 quantum between the bound lepton and the nucleus exclusively leads to hyperfine effects, but does not affect the Lamb shift. Effects due to the X17 are shown to be drastically enhanced for muonic bound systems. Prospects for the detection of hyperfine effects mediated by X17 exchange are analyzed for muonic deuterium, muonic hydrogen, muonium, true muonium ($μ^+μ^-$ bound system), and positronium.
description: 14 pages; RevTeX
The Communication Complexity of the Hamming Distance Problem
Creators: name: Huang, Wei
name: Shi, Yaoyun
name: Zhang, Shengyu
name: Zhu, Yufan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the randomized and quantum communication complexity of the Hamming Distance problem, which is to determine if the Hamming distance between two n-bit strings is no less than a threshold d. We prove a quantum lower bound of Ω(d) qubits in the general interactive model with shared prior entanglement. We also construct a classical protocol of O(d \log d) bits in the restricted Simultaneous Message Passing model, improving previous protocols of O(d^2) bits (A. C.-C. Yao, Proceedings of the Thirty-Fifth Annual ACM Symposium on Theory of Computing, pp. 77-81, 2003), and O(d\log n) bits (D. Gavinsky, J. Kempe, and R. de Wolf, quant-ph/0411051, 2004).
description: 8 pages, v3, updated reference. to appear in Information Processing Letters, 2006
Booklet: Sustainable Lamb Meat Production for Europe
Creators: name: Baratta, Mario
name: Battaglini, Luca
name: Macchi, Elisabetta
name: Miretti, Silvia
name: Chiesa, Francisco
name: Brugiapaglia, Alberto
name: Viola, Irene
name: Perona, Giovanni
name: Ogun, Sinan
name: Peric, Tanja
name: Bergant, Martina
name: Lorenzo, Jose Manuel
name: Franco, Daniel
name: Bermudez, Roberto
name: Cutillas, Laura
name: Miguez, Martin
name: Munekata, Paulo
name: Bodas, Raul
name: Osoro, Koldo
name: Rosa Garcia, Rocio
name: Celaya, Rafael
name: Garcia, Urcesino
name: Gess, Andreas
name: Tolsdorf, Anna
name: Bos, Ulrike
name: Ko, Nathanael
name: Albrecht, Stefan
name: Klein, Nathalie
name: Fath, Lisa
name: Cadavez, Vasco
name: Gonzales-Barron, Ursula
name: Rodrigues, Gisela
name: Coelho-Fernandes, Sara
name: Felix, Diogo
name: Yilmaz, Odur
name: Tuzun, Ahmet
name: Hazar, Dalya
name: Bayrak, Zeynep
Publisher: name: Zenodo
Year: 2020
Subjects: Sustainability
Meat quality
Welfare
Sheep farms
Local breeds

description: Booklet of the project "Holistic Production to Reduce the Ecological Footprint of Lamb Meat" (ECOLAMB), funded by EU ERA-NET SusAn.
Additional file 1 of Identification and characterization of an R-Smad homologue (Hco-DAF-8) from Haemonchus contortus
Creators: name: Li, Fang-Fang
name: Gasser, Robin B.
name: Liu, Feng
name: Jia-Nan Shan
name: Di, Wen-Da
name: He, Li
name: Cai-Xian Zhou
name: Chun-Qun Wang
name: Fang, Rui
name: Hu, Min
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Table S1. Oligonucleotide primers used in the present study. Table S2. Sequences used for phylogenetic and alignment analyses.
Scaling solutions and weak gravity in dark energy with energy and momentum couplings
Creators: name: Amendola, Luca
name: Tsujikawa, Shinji
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that the $Λ$CDM tensions of the Hubble-Lemaitre expansion rate $H_0$ and the clustering normalization $σ_8$ can be eased, at least in principle, by considering an interaction between dark energy and dark matter in such a way to induce a small and positive early effective equation of state and a weaker gravity. For a dark energy scalar field $ϕ$ interacting with dark matter through an exchange of both energy and momentum, we derive a general form of the Lagrangian allowing for the presence of scaling solutions. In a subclass of such interacting theories, we show the existence of a scaling $ϕ$-matter-dominated-era ($ϕ$MDE) which can potentially alleviate the $H_0$ tension by generating an effective high-redshift equation of state. We also study the evolution of perturbations for a model with $ϕ$MDE followed by cosmic acceleration and find that the effective gravitational coupling relevant to the linear growth of large-scale structures can be smaller than the Newton gravitational constant $G$ at low redshifts. The momentum exchange between dark energy and dark matter plays a crucial role for realizing weak gravity, while the energy transfer is also required for the existence of $ϕ$MDE.
description: 20 pages, three figures; some typos corrected; matches version accepted for publication on JCAP
Análise de distorções no mercado mundial do café: um modelo de programação matemática
Creators: name: Teixeira, Sônia Milagres
name: Chattin, Bárbara
name: Teixeira, Sônia Milagres
name: Chattin, Bárbara
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: O café é de importância excepcional à economia de muitos países, amplamente dependentes desse bem para obtenção de moeda estrangeira e para dar continuidade aos seus programas de desenvolvimento sócio-econômico. Este estudo analisa distorções no mercado devido à implementação de políticas específicas de controle pelos exportadores e importadores no mercado internacional do café. Consiste de dois estágios: primeiro, um caso de mercado livre para o café é apresentado sem distorções políticas; segundo, este caso livre é usado como base de comparação das distorções do mercado de café devido à política específica com ênfase nas inclinações, intercessões, preços e quantidades nas curvas de excedentes de oferta e demanda relevantes para as distorções, comparadas ao caso do mercado livre.
Pesquisa e assistência técnica na citricultura: custos e retornos sociais
Creators: name: Moricochi, Luis
name: Neves, Evaristo Marzabal
name: Araújo, Paulo F. Cidade De
name: Moricochi, Luis
name: Neves, Evaristo Marzabal
name: Araújo, Paulo F. Cidade De
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: Este estudo faz uma análise econômica dos programas de pesquisa e assistência técnica em "citrus", para os últimos quarenta anos, no Estado de São Paulo. Os objetivos específicos foram: a) estimar custos de pesquisa e assistência técnica para "citrus" e b) estimar retornos sociais para investimentos públicos. Os conceitos de custos e bem-estar social utilizados por Alfred Marshall fornecem a base teórica para a análise. Informações sobre custos foram obtidas de dispêndios e orçamentos governamentais. Os benefícios foram estimados através de ganhos em produtividade da cultura. Os resultados mostraram que os benefícios excederam os custos a partir da década de 50. As taxas internas de retorno variam de 18,33% a 27,61%, baseadas em diferentes elasticidades preço da demanda e da oferta e assumindo também hipóteses diferentes de deslocamento da curva de oferta.
A multispecies Calogero model
Creators: name: Meljanac, S.
name: Mileković, M.
name: Samsarov, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study a multispecies one-dimensional Calogero model with two- and three-body interactions. Using an algebraic approach (Fock space analysis), we construct ladder operators and find infinitely many, but not all, exact eigenstates of the model Hamiltonian. Besides the ground state energy, we deduce energies of the excited states. It turns out that the spectrum is linear in quantum numbers and that the higher-energy levels are degenerate. The dynamical symmetry responsible for degeneracy is SU(2). We also find the universal critical point at which the model exhibits singular behaviour. Finally, we make contact with some special cases mentioned in the literature.
description: 16 pages, no figures, LateX, enlarged version that appeared in Phys.Lett.B
Nonparametric constraints on neutron star matter with existing and upcoming gravitational wave and pulsar observations
Creators: name: Landry, Philippe
name: Essick, Reed
name: Chatziioannou, Katerina
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Observations of neutron stars, whether in binaries or in isolation, provide information about the internal structure of the most extreme material objects in the Universe. In this work, we combine information from recent observations to place joint constraints on the properties of neutron star matter. We use (i) lower limits on the maximum mass of neutron stars obtained through radio observations of heavy pulsars, (ii) constraints on tidal properties inferred through the gravitational waves neutron star binaries emit as they coalesce, and (iii) information about neutron stars' masses and radii obtained through X-ray emission from surface hot spots. In order to combine information from such distinct messengers while avoiding the kind of modeling systematics intrinsic to parametric inference schemes, we employ a nonparametric representation of the neutron-star equation of state based on Gaussian processes conditioned on nuclear theory models. We find that existing astronomical observations imply $R_{1.4}=12.32^{+1.09}_{-1.47}\,\mathrm{km}$ for the radius of a $1.4\,M_{\odot}$ neutron star and $p(2ρ_\mathrm{nuc})=3.8^{+2.7}_{-2.9}\times10^{34}\,\mathrm{dyn}/\mathrm{cm}^2$ for the pressure at twice nuclear saturation density at the 90% credible level. The upper bounds are driven by the gravitational wave observations, while X-ray and heavy pulsar observations drive the lower bounds. Additionally, we compute expected constraints from potential future astronomical observations and find that they can jointly determine $R_{1.4}$ to ${\cal{O}}(1)\,\mathrm{km}$ and $p(2ρ_\mathrm{nuc})$ to 80% relative uncertainty in the next five years.
description: 22 pages, 11 figures; added figure with sound speed constraints, matches the published version; Zenodo data release DOI:10.5281/zenodo.4678702
Análise da armazenagem e dos preços do milho no estado de São Paulo
Creators: name: Ruas, Davi Guilherme Gaspar
name: Barros, Geraldo Sant'Ana De C.
name: Ruas, Davi Guilherme Gaspar
name: Barros, Geraldo Sant'Ana De C.
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: Este trabalho analisa as variações de preço de milho ao produtor e ao atacado e procura detectar a influência de variações de preço sobre as decisões quanto ao armazenamento do produto, no Estado de São Paulo. Os resultados indicaram que, no período de 1965 a 1975, a margem do atacadista oscilou entre 16% e 24%. A elasticidade de transmissão de preços, estimada em 0,76, indicou que para variações de 10% no preço ao produtor ocorrem, em média, variações de 7,6% no preço ao atacado. Verificou-se, também, que variações de preço do milho têm sido acompanhadas de variações nos estoques, no sentido de estabilizar os preços.
Now! UBC Climate Action Conference 2010
Creators: name: Tam, Katina
Publisher: name: The University of British Columbia
Year: 2012

description: The NOW! UBC Climate Action Conference involved a great deal of organization and conference planning. With the event being the first of its kind, the following report provides information on how the conference was planned by this year’s Organizing Committee, with recommendations for next year. This paper includes a reflection on how my position as co-chair has benefitted myself and has helped me grow as a student and as a person. Lastly, resources have been provided for next year’s Organizing Committee. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Uma análise da distribuição do crédito rural no Brasil
Creators: name: Rego, Adilson José Da Costa
name: Wright, Charles L.
name: Rego, Adilson José Da Costa
name: Wright, Charles L.
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: Na década de 70, o crédito rural subsidiado ocupou posição de destaque na política agrícola como meio de difundir técnicas modernas e compensar o setor pelos encargos que sobre ele incidem. Diversos autores, entretanto, demonstram que tais subsídios podem criar distorções, como concentração do crédito, utilização de recursos próprios noutros setores e emprego inapropriado de fatores, de modo que os objetivos dos subsídios não sejam plenamente alcançados. Este trabalho quantifica alguns dos resultados constatados ao longo do decênio, em termos da concentração do crédito por tamanho de estabelecimento, por região e por produto. Verificam-se elevados graus de concentração do crédito em grandes estabelecimentos e em culturas que utilizam técnicas intensivas em capital, e menor concentração entre regiões. Há, ainda, relação inversa entre valor de produção por hectare possuído e crédito recebido em propriedades de diferentes estratos de tamanho.
Non-constant ground states for symmetry-breaking fields in brane world models
Creators: name: Knapman, Alan
name: Toms, David J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We obtain an approximate analytical solution for the ground state of a bulk scalar field with a double-well potential in the Randall-Sundrum brane world background, in a situation where the boundary conditions rule out a constant field configuration except for the zero solution. The stability of the zero solution is determined by the brane separation. We find our approximation near the critical separation at which the zero solution becomes unstable to small perturbations.
description: 3 pages, 2 figures
Disformal invariance of cosmological observables
Creators: name: Chiba, Takeshi
name: Chibana, Fabio
name: Yamaguchi, Masahide
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the frame dependence/independence of cosmological observables under disformal transformations, extending the previous results regarding conformal transformations, and provide the correspondence between Jordan-frame and Einstein-frame variables. We consider quantities such as the gravitational constant in the Newtonian limit, redshift, luminosity and angular diameter distances, as well as the distance-duality relation. Also, the Boltzmann equation, the observed specific intensity, and the adiabaticity condition are discussed. Since the electromagnetic action changes under disformal transformations, photons in the Einstein frame no longer propagate along null geodesics. As a result, several quantities of cosmological interest are modified. Nevertheless, we show that the redshift is invariant and the distance-duality relation (the relation between the luminosity distance and the angular diameter distance) still holds in general spacetimes even though the reciprocity relation (the relation between two geometrical distances) is modified.
description: 29 pages, 1 figure. v3: updated subsection 4.3 and fixed minor typos
Additional file 1 of How can we support best practice? A situational assessment of injury prevention practice in public health
Creators: name: Richmond, Sarah A.
name: Carsley, Sarah
name: Prowse, Rachel
name: Manson, Heather
name: Moloughney, Brent
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Table S1. Key informant and focus group interview guides.
Hall effect anomaly near Tc and renormalized superconducting fluctuations in YBCO
Creators: name: Puica, I.
name: Lang, W.
name: Goeb, W.
name: Sobolewski, R.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Measurements of the Hall effect and the resistivity on precisely-patterned YBCO thin films in magnetic fields B from 0.5 to 6 T oriented parallel to the sample crystallographic c axis reveal a sign reversal of the Hall coefficient for B <= 3 T. The data are compared to the full, quantitative expressions based on the renormalized fluctuation model for the Hall conductivity. The model offers a satisfactory understanding of the experimental results, for moderate fields and temperatures near the critical region, provided that the inhomogeneity of the critical temperature distribution is also taken into account. We also propose an approach how vortex pinning that strongly affects the magnitude of the Hall coefficient can be incorporated in the model.
description: 8 pages, 3 figures, to be published in Phys. Rev. B
Bose-Einstein condensation in real space
Creators: name: Valencia, J. J.
name: de Llano, M.
name: Solis, M. A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We illustrate how Bose-Einstein condensation occurs not only in momentum space but also in coordinate (or real) space. Analogies between the isotherms of a van der Waals gas of extended (or finite-diameter) identical atoms and the point (or zero-diameter) particles of an ideal Bose gas allow one to conclude that, in contrast to the van der Waals case, the volume per particle can go to zero in the pure Bose condensate phase precisely because the particle diameter is zero.
description: Ten pages including 2 figures
A microscopic model for spontaneous fission: validity of the adiabatic approximation
Creators: name: Hagino, K.
name: Bertsch, G. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate microscopically the tunneling dynamics in spontaneous fission of atomic nuclei. To this end, we employ a schematic solvable model with a pairing-plus-quadrupole interaction. The spontaneous decay of a system is simulated by introducing a small imaginary part to the energy of a fission doorway state. We show that the many-body Hamiltonian can be reduced to an effective 2$\times$2 Hamiltonian, from which one can derive a simple approximate formula for the decay width. We particularly investigate the applicability of the adiabatic approximation, which has often been used in the literature. With typical value of the parameters, we find that the adiabatic approximation works within a factor of around 5 for the decay width.
description: 9 pages, 7 figures
Magnetic field dependence of the low-temperature specific heat of the electron-doped superconductor Pr1.85Ce0.15CuO4
Creators: name: Yu, W.
name: Liang, B.
name: Greene, R. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We remeasured the magnetic field dependence of the low-temperature specific heat of the electron-doped superconductor Pr1.85Ce0.15CuO4 (T_C=22\pm 2K) under a different measurement procedure. Under field-cooling, the electronic specific heat follows C_{el}(H, T)=γ(H)T from 4.5K down to 1.8K. In the field range H_{C1}
description: 4 pages, 3 figures
Agricultura de exportação e a disputa por mão-de-obra na agricultura
Creators: name: Gasques, J. G.
name: Gebara, J. J.
name: Zocoller, M. M.
name: Gasques, J. G.
name: Gebara, J. J.
name: Zocoller, M. M.
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: Este trabalho analisa a disputa entre dois subsetores na agricultura, doméstico e exportador, e a pressão sobre o mercado de trabalho na agricultura do Estado de São Paulo, Brasil, quando a dotação de trabalho é dada por hipótese.
A shortest path-aided label-setting map matching algorithm for offline applications
Creators: name: Dongqing Zhang
name: Zhaoxia Guo
name: Guo, Feng
name: Yucheng Dong
Publisher: name: figshare
Year: 2021
Subjects: Applied Computer Science

description: Offline map matching is to match a GPS trajectory represented by a series of recorded geographic coordinates (GPS points) to the road network. This paper defines the weight on each road link as the matching error of this link to the matched GPS points and formulates the offline map matching problem as a shortest path problem with resource constraints. A label-setting map matching algorithm is proposed by calculating the matching error on each link and extending the label-setting shortest path algorithm to find the path with the minimum total matching error. Experiments are conducted to compare the proposed algorithm with three state-of-the-art map matching algorithms using real taxi trajectory data. The results demonstrate that the proposed algorithm outperforms the three benchmark algorithms in terms of both matching accuracy and computational efficiency. Specifically, the proposed algorithm achieves larger correctly matched length percentages (5.36% to 12.27% larger) and smaller incorrectly matched length percentages (3.72% to 75.30% smaller) at a very high matching speed (60.59 points per second on average over thirteen sampling intervals).
Relações receita-custos na suinocultura do Rio Grande do Sul: 1970 a 1978
Creators: name: Oliveira, Jorge G. De
name: Konzen, Otto Guilherme
name: Oliveira, Jorge G. De
name: Konzen, Otto Guilherme
Publisher: name: Unknown
Year: 1981
Subjects: Agribusiness

description: O estudo tem como objetivo analisar a evolução da rentabilidade da produção de suínos no Rio Grande do Sul, de 1970 a 1978. Para a determinação da rentabilidade partiu-se da estrutura dos custos da produção, das relações de insumos alimentares com ganho de peso vivo e dos preços do produto e dos principais insumos. Estas relações permitem determinar margens percentuais de receita após a dedução dos custos com alimentação. Admitindo-se, com base em estudos de formação dos custos, que a alimentação representa, aproximadamente, 70% dos custos totais, as margens computadas indicam a parcela da receita disponível para remunerar os custos não elementares que incluem o capital, a manutenção do rebanho de reprodução e a mão-de-obra. Os resultados mostraram uma variabilidade grande na rentabilidade, determinada, principalmente, pela combinação dos preços do milho e dos concentrados com o preço recebido pelo produto.
Intersections of automorphism fixed subgroups in the free group of rank three
Creators: name: Martino, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E05, 20F28

description: We show that in the free group of rank 3, given an arbitrary number of automorphisms, the intersection of their fixed subgroups is equal to the fixed subgroup of some other single automorphism.
description: Published by Algebraic and Geometric Topology at http://www.maths.warwick.ac.uk/agt/AGTVol4/agt-4-11.abs.html
Defining the Contours of the Public Morals Exception under Article XX of the GATT 1994
Creators: name: AlModarra, B.B.M.
name: AlModarra, B.B.M.
Publisher: name: Unknown
Year: 2017
Subjects: subject: extra-territorial jurisdiction
subject: public morals
subject: trade liberalisation

description: Though the liberalisation of trade in goods is the central objective of the General Agreement on Tariffs and Trade 1994 (GATT 1994), Article XX makes provisions on general exceptions to the legally binding trade liberalisation obligations. Of the ten paragraphs contained under Article XX that provide for various exceptions, the first paragraph – Article XX(a) – allows for derogation from the obligations under the GATT 1994 if the justification for this is based on a necessary protection of public morals. There are very few cases on the public morals exception. The U.S. – Gambling case was the first decided case where the public morals exception was the subject matter. However, this case was decided under the services regime in WTO law – i.e., the General Agreement on Trade in Services. The China – Publications and Audiovisual Products case offered the opportunity for aWTO dispute settlement panel and the Appellate Body to provide clarity on the public morals exception as it relates to trade in goods. This article explores the contours of the public morals exception under Article XX(a) of the GATT 1994 by engaging in analyses of the two decided cases where the issue of public morals was a key subject matter in the dispute. It also borrows from the jurisprudence on other exceptions under Article XX in a bid to map out the contours of the public morals exception.
DYNAMIC MODELLING AND THE DEMAND FOR NARROW MONEY IN NORWAY
Creators: name: Bardsen, Gunnar
name: Bardsen, Gunnar
Publisher: name: Unknown
Year: 1990
Subjects: Financial Economics
Research Methods/ Statistical Methods

description: Useful results on statistical inference and reparameterizations when estimating error correction models are summarized. The suggested approach is tested in a pilot Monte Carlo study and illustrated by estimating a money demand function for Norway. The estimated model forecasts well 21 period ahead in spite of deregulation of credit markets during the forecast period.
Additional file 1 of Submarine landslide source models consistent with multiple tsunami records of the 2018 Palu tsunami, Sulawesi, Indonesia
Creators: name: Nakata, Kenji
name: Katsumata, Akio
name: Muhari, Abdul
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Additional file 1: Figure S1. Bathymetric (10-m contour interval) and topographic maps of the waveform comparison sites (red stars; see red squares in Fig. 1) for the tsunami calculations. Figure S2. Calculated tsunamis generated by landslide sources in the northern part of the bay. The results (models A, left; and B, right) are shown. a Comparison between calculated (red curves) and observed waveforms (black curves, video-inferred waveforms from Carvajal et al. 2019; gray curve, waveform at the Pantoloan tide gauge). b Distributions of the maximum calculated tsunami amplitude over the entire bay for each fault model. The color scale indicates the tsunami amplitude. Left and right graphs compare the calculated tsunami run-up heights (red curves) with those (black bars) determined by field surveys on the western and eastern coasts, respectively. Figure S3. Calculated tsunamis generated by landslide sources in the southern part of the bay. The results (models D, left; and F, right) are shown. Same as Figure S2 for source models D and F. Figure S4. Comparison of calculated and observed run-up heights. The heights on the eastern (blue) and western coasts (green) for model G are shown. Aida’s (1978) K and κ were calculated from these data and are reported for each coast as well as for all sites (black). The solid and dashed lines indicate the ratio of 1.0 between the calculated and observed run-up heights and the ratios of 2.0 and 0.5, respectively. Figure S5. Calculated tsunamis generated by a coastal collapse and Takagi et al. (2019) (models N and O). Same as Figure S2 for source models N and O.
Transverse asymmetry of $γ$ rays from neutron-induced compound states of ${}^{140}{\rm La}$
Creators: name: Yamamoto, T.
name: Okudaira, T.
name: Endo, S.
name: Fujioka, H.
name: Hirota, K.
name: Ino, T.
name: Ishizaki, K.
name: Kimura, A.
name: Kitaguchi, M.
name: Koga, J.
name: Makise, S.
name: Niinomi, Y.
name: Oku, T.
name: Sakai, K.
name: Shima, T.
name: Shimizu, H. M.
name: Takada, S.
name: Tani, Y.
name: Yoshikawa, H.
name: Yoshioka, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A correlation term ${{ σ}_{n} }\cdot ({ k_{n}\times k_γ}) $ in the ${}^{139}{\rm La}(\vec{n},γ)$ reaction has been studied utilizing epithermal polarized neutrons and germanium detectors. The transverse asymmetry for single $γ$-ray transition was measured to be $0.60\pm0.19$ in the $p$-wave resonance.
Quantisation of $κ$-deformed Dirac equation
Creators: name: Harikumar, E.
name: Rajagopal, Vishnu
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the quantisation of Dirac field theory in the $κ$-deformed space-time. We adopt a quantisation method that uses only equations of motion for quantising the field. Starting from $κ$-deformed Dirac equation, valid up to first order in the deformation parameter $a$, we derive deformed unequal time anti-commutation relation between deformed field and its adjoint, leading to undeformed oscillator algebra. Exploiting the freedom of imposing a deformed unequal time anti-commutation relations between $κ$-deformed spinor and its adjoint, we also derive a deformed oscillator algebra. We show that deformed number operator is the conserved charge corresponding to global phase transformation symmetry. We construct the $κ$-deformed conserved currents, valid up to first order in $a$, corresponding to parity and time-reversal symmetries of $κ$-deformed Dirac equation also. We show that these conserved currents and charges have a mass-dependent correction, valid up to first order in $a$. This novel feature is expected to have experimental significance in particle physics. We also show that it is not possible to construct a conserved current associated with charge conjugation, showing that the Dirac particle and its anti-particle satisfy different equations in $κ$-space-time.
description: 18 page, More discussions, calculations and references added
MONETARY CONTRATING BETWEEN CENTRAL BANKS AND THE DESIGN OF SUSTAINABLE EXCHANGE-RATE ZONES
Creators: name: Delgado, Franciso
name: Dumas, Bernard
name: Delgado, Franciso
name: Dumas, Bernard
Publisher: name: Unknown
Year: 1990
Subjects: Financial Economics
International Relations/Trade

description: An exchange-rate system is a set of contracts which commits Central banks to intervene in the foreign-exchange market. The design features of the system include: the rules -of intervention, the limits placed on exchange rates and the "crisis scenario" which describes possible transitions to new regimes in case one Central bank runs out of reserves or borrowing capacity. This paper considers the various trade-offs one faces in designing an exchange-rate system. Svensson (1989) has already analyzed the degree of variability in the exchange rate, the interest rate and the fundamentals. But the tradeoff also pertains to the amount of reserves which the Central banks must have on hand in order to forestall a speculative attack and make the system sustainable. The amount of reserves needed depends crucially on the assumed crisis scenario.
Computational Design with Crowds
Creators: name: Koyama, Yuki
name: Igarashi, Takeo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Graphics (cs.GR)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Computational design is aimed at supporting or automating design processes using computational techniques. However, some classes of design tasks involve criteria that are difficult to handle only with computers. For example, visual design tasks seeking to fulfill aesthetic goals are difficult to handle purely with computers. One promising approach is to leverage human computation; that is, to incorporate human input into the computation process. Crowdsourcing platforms provide a convenient way to integrate such human computation into a working system. In this chapter, we discuss such computational design with crowds in the domain of parameter tweaking tasks in visual design. Parameter tweaking is often performed to maximize the aesthetic quality of designed objects. Computational design powered by crowds can solve this maximization problem by leveraging human computation. We discuss the opportunities and challenges of computational design with crowds with two illustrative examples: (1) estimating the objective function (specifically, preference learning from crowds' pairwise comparisons) to facilitate interactive design exploration by a designer and (2) directly searching for the optimal parameter setting that maximizes the objective function (specifically, crowds-in-the-loop Bayesian optimization).
description: This book chapter was originally published in Computational Interaction edited by Antti Oulasvirta, Per Ola Kristensson, Xiaojun Bi, and Andrew Howes
Britain's Return to Gold and Impending Entry into the EMS: Expectations, Joining Conditions and Credibility
Creators: name: Miller, Marcus
name: Sutherland, Alan
name: Miller, Marcus
name: Sutherland, Alan
Publisher: name: Unknown
Year: 1990
Subjects: Financial Economics
Resource /Energy Economics and Policy

description: In this paper the surprising conclusion of Smith and Smith (1990) that the prospect of Britain's return to Gold in 1925 had the effect of weakening sterling is subjected to critical analysis. It is shown that this conclusion is reversed when the trend in the UK money stock prior to joining the Gold Standard is treated as endogenous; and when nonstationary solutions are considered. It is further suggested that a more realistic interpretation of events must involve the use of a model with price inertia. The final section of the paper considers the major difference between the UK's return to Gold and its impending entry into the EMS, namely the current lack of credibility attached to an exchange rate peg for sterling.
Unconventional phases in a Haldane model of dice lattice
Creators: name: Dey, Bashab
name: Kapri, Priyadarshini
name: Pal, Ojasvi
name: Ghosh, Tarun Kanti
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a Haldane-like model of dice lattice analogous to graphene and explore its topological properties within the tight-binding formalism. The topological phase boundary of the system is identical to that of Haldane model of graphene but the phase diagram is richer than the latter due to existence of a distorted flat band. The system supports phases which have a "gapped-out" valence (conduction) band and an indirect overlap between the conduction (valence) band and the distorted flat band. The overlap of bands imparts metallic character to the system. These phases may be further divided into topologically trivial and nontrivial ones depending on the Chern number of the "gapped-out" band. The semimetallic phases exist as distinct points that are well separated from each other in the phase diagram and exhibit spin-1 Dirac-Weyl dispersion at low energies. The Chern numbers of the bands in the Chern-insulating phases are $0$ and $\pm2$. This qualifies the system to be candidate for quantum anomalous Hall effect with two chiral channels per edge. Counterpropagating edge states emanate from the flat band in certain topologically trivial phases. The system displays beating pattern in Shubnikov de Haas oscillations for unequal magnitude of mass terms in the two valleys. We show that the chemical potential and ratio of topological parameters of the system viz. Semenoff mass and next-neighbor hopping amplitude may be experimentally determined from the number of oscillations between the beating nodes and the beat frequency, respectively.
description: 11 pages, 12 figures
Ancestral lines under recombination
Creators: name: Baake, Ellen
name: Baake, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 34G20, 92D15, 60J27

description: Solving the recombination equation has been a long-standing challenge of \emph{deterministic} population genetics. We review recent progress obtained by introducing ancestral processes, as traditionally used in the context of \emph{stochastic} models of population genetics, into the deterministic setting. With the help of an ancestral partitioning process, which is obtained by letting population size tend to infinity (without rescaling parameters or time) in an ancestral recombination graph, we obtain the solution to the recombination equation in a transparent form.
description: to appear in: Probabilistic Structures in Evolution, E. Baake and A. Wakolbinger (eds.), EMS Publishing House, Zurich
Electronic inhomogeneity at magnetic domain walls in strongly-correlated systems
Creators: name: Rzchowski, M. S.
name: Joynt, Robert
Publisher: name: arXiv
Year: 2003
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that nano-scale variations of the order parameter in strongly-correlated systems can induce local spatial regions such as domain walls that exhibit electronic properties representative of a different, but nearby, part of the phase diagram. This is done by means of a Landau-Ginzburg analysis of a metallic ferromagnetic system near an antiferromagnetic phase boundary. The strong spin gradients at a wall between domains of different spin orientation drive the formation of a new type of domain wall, where the central core is an insulating antiferromagnet, and connects two metallic ferromagnetic domains. We calculate the charge transport properties of this wall, and find that its resistance is large enough to account for recent experimental results in colossal magnetoresistance materials. The technological implications of this finding for switchable magnetic media are discussed.
description: Version submitted to Physical Review Letters, except for minor revisions to references
New Hadron Spectroscopy with BABAR
Creators: name: Mohanty, Gagan B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We review hadron spectroscopy at BABAR with emphasis on recent results from the studies of the X(3872) state, inclusive charmonia on recoil, double charmonium production, and the broad structure observed at around 4.26 GeV/c^2. These results are preliminary, unless otherwise specified.
description: 6 pages, 6 postscript figures, contributed to the Proceedings of Frontier Science 2005