cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An Algebraic Brascamp-Lieb Inequality
Creators: name: Duncan, Jennifer
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: We prove a global nonlinear Brascamp-Lieb inequality for a general class of maps, encompassing polynomial and rational maps, as a consequence of the multilinear Kakeya-type inequalities of Zhang and Zorin-Kranich. We incorporate a natural affine-invariant weight that compensates for local degeneracies, and yields a uniform constant that depends only on the 'degree' of the maps involved.
Monopole gas in three dimensional SU(2) gluodynamics
Creators: name: Chernodub, M. N.
name: Ishiguro, Katsuya
name: Suzuki, Tsuneo
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study properties of the Abelian monopoles in the Maximal Abelian projection of the three dimensional pure SU(2) gauge model. We match the lattice monopole dynamics with the continuum Coulomb gas model using a method of blocking from continuum. We obtain the Debye screening length and the monopole density in continuum using numerical results for the lattice density of the (squared) monopole charges and for the monopole action. The monopoles treated within our blocking method provide about 75% contribution to the non--Abelian Debye screening length. We also find that monopoles form a Coulomb plasma which is not dilute.
description: 9 pages, 8 figures, RevTeX4.0
Cybaeodes molara Roewer
Creators: name: Platnick
name: Di Franco,
Publisher: name: Zenodo
Year: 1992
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Liocranidae
Cybaeodes
Cybaeodes molara

description: Cybaeodes molara (Roewer), new combination Figures 11-14 Cerrutia molaraRoewer, 1960: 88 (holotype female and allotype male from Cozzo S. Croce, Grotta Molara, Palermo, Sicily, Italy, in Natur- Museum Senckenberg, examined). DIAGNOSIS: Males differ from those of C. marinae in having a much wider embolar base (compare Figs. 11, 12 with Di Franco, 1989: fig. 2); the rectangular shape of the epigynum clearly differs from that of the other known females (compare Figs. 13, 14 with Di Franco, 1989: figs. 3, 5, 6). MALE: Total length 6.24. Carapace 2.78 long, 2.04 wide. Femur 11 2.59 long. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.05, PLE 0.07; AME-AME 0.08, AME- ALE 0.09, PME-PME 0.16, PME-PLE 0.13, ALE-PLE 0.07; MOQ length 0.18, front width 0. 10, back width 0.23. Leg spination: femora: I dl-1-1; II dl-1-1, pl-1-1, rO- 1-0; III, IV rl- 1-1; tibia II p0-1-1, v2-3 -3. Palp with large median apophysis pointed and curved distally, wide embolar base with small peak on its anterior ridge, short embolar projection in front of second small, mediodorsally curved projection; retrolateral tibial apophysis longer and thicker than in C. marinae (Figs. 11, 12). FEMALE: Total length 7.02. Carapace 3.33 long, 2.59 wide. Femur 11 2.96 long. Eye sizes and interdistances: AME 0.04, ALE 0.08, PME 0.05, PLE 0.09; AME-AME 0. 10, AME- ALE 0.1 1, PME-PME 0.23, PME-PLE 0.23, ALE-PLE 0. 12; MOQ length 0.20, front width 0.18, back width 0.27. Leg spination: femora: I, II dl-l-l; III, IV rl-l-l; tibia II pO-1-1, vlp-3-2. Epigynum with large anterior ridge and posterolateral v-shaped ridges surrounding two small invaginations (Fig. 13); vulva with two large tubular and curved median spermathecae and small paramedian ducts (Fig. 14). MATERIAL EXAMINED: Only the types. DISTRIBUTION: Known only from Sicily.
description: Published as part of Platnick & Di Franco, 1992, On The Relationships of the Spider Genus Cybaeodes (Araneae, Dionycha), pp. 1-9 in American Museum Novitates 3053 on pages 7-8, DOI: 10.5281/zenodo.814924
description: {"references": ["1960. Drei cavernicole Araneen-Arten aus Sizilien, erbeutet von Herrn M. Cerruti (Rom). Fragm. Entomol. 3: 87 - 94.", "Di Franco, F. 1989. Cybaeodes marinae; nuova specie di Gnaphosidae (Arachnida, Araneae) d'Italia. Animalia 15: 25 - 36."]}
IMPACTO DOS ROYALTIES NA COMERCIALIZAÇÃO NACIONAL DE FLORES: UM ESTUDO MULTI-CASO
Creators: name: Broek, Luciano Van Den
name: Veldt, Tânia Verônica
name: Carvalho, Thiago Bernardino De
name: Broek, Luciano Van Den
name: Veldt, Tânia Verônica
name: Carvalho, Thiago Bernardino De
Publisher: name: Unknown
Year: 2006
Subjects: subject: Agricultural Finance
subject: Marketing
subject: FOS: Economics and business
subject: flores
subject: royalties
subject: exportações
subject: barreiras
subject: comercialização

description: No setor de flores e na agricultura em geral, uma das formas de se criar barreiras às exportações se dá através recolhimento de royalties, já que muitos produtores propagam variedades protegidas, devem pagar os devidos direitos às empresas detentoras do registro dessas espécies e variedades. A fiscalização em relação ao recolhimento dos royalties está começando a interferir as exportações de flores brasileiras. Casos como os de lotes de antúrio e rosa exportados serem rejeitados ou até incinerados ao chegarem nos aeroportos de países como Portugal, Holanda, ou outros países importadores, dado a alegação de falta de comprovante de recolhimento de royalties, vêm se tornando cada vez mais comuns. Além desses impactos, inúmeros outros, envolvendo os produtores e o setor de flores e plantas ornamentais de forma geral podem ser descritos. Dessa maneira, o presente trabalho, através de um estudo multi-caso tem como objetivo, identificar e analisar os impactos do recolhimento de royalties na produção e comercialização de flores, para que assim se possa simultaneamente informar e melhorar a performance do setor exportador, bem como servir de subsídios às negociações internacionais que visem à eliminação dos obstáculos comerciais ou acordos relacionados ao recolhimento de royalties.
The Clouds in Asynchronous Cellular Automata
Creators: name: Roy, Souvik
name: Das, Sukanta
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: This article introduces the notion of clouds in asynchronous cellular automata (ACAs). We show that the cloud behaviour of ACAs has similarity with natural clouds across the sky, election model of parliamentary democratic system, and electron cloud around nucleus. These systems, therefore, can be modelled by the ACAs.
A simple and efficient kinetic model for wealth distribution with saving propensity effect: based on lattice gas automaton
Creators: name: Cui, Lijie
name: Lin, Chuandong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The dynamics of wealth distribution plays a critical role in the economic market, hence an understanding of its nonequilibrium statistical mechanics is of great importance to human society. For this aim, a simple and efficient one-dimensional (1D) lattice gas automaton (LGA) is presented for wealth distribution of agents with or without saving propensity. The LGA comprises two stages, i.e., random propagation and economic transaction. During the former phase, an agent either remains motionless or travels to one of its neighboring empty sites with a certain probability. In the subsequent procedure, an economic transaction takes place between a pair of neighboring agents randomly. It requires at least 4 neighbors to present correct simulation results. The LGA reduces to the simplest model with only random economic transaction if all agents are neighbors and no empty sites exist. The 1D-LGA has a higher computational efficiency than the 2D-LGA and the famous Chakraborti-Chakrabarti economic model. Finally, the LGA is validated with two benchmarks, i.e., the wealth distributions of individual agents and dual-earner families. With the increasing saving fraction, both the Gini coefficient and Kolkata index (for individual agents or two-earner families) reduce, while the deviation degree (defined to measure the difference between the probability distributions with and without saving propensities) increases. It is demonstrated that the wealth distribution is changed significantly by the saving propensity which alleviates wealth inequality.
On the Buchstaber--Rees theory of "Frobenius $n$-homomorphisms" and its generalization
Creators: name: Khudaverdian, H. M.
name: Voronov, Th. Th.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: Mathematical Physics (math-ph)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This is a survey of our results on the theory of $n$-homomorphisms of Buchstaber--Rees and its generalization that we obtained. In short, we are concerned with classes of linear maps between commutative rings that can be described the "next level after ring homomorphisms" with respect to multiplicative properties. Our main tool is a construction which we call the "characteristic function" -- whose functional properties encode algebraic properties of a linear map in question. Namely, if the characteristic function is polynomial of degree $n$, the map is an $n$-homomorphism in the sense of Buchstaber--Rees, and our approach simplifies their theory substantially. If the characteristic function is an irreducible rational fraction with the numerator and denominator of degrees $p$ and $q$ respectively, we arrive at a new notion of a "$p|q$-homomorphism". Examples of $p|q$-homomorphisms are sums and differences of ring homomorphisms. Our construction is motivated by our earlier results in superalgebra/supergeometry concerning Berezinians and super exterior powers.
description: LaTeX, 10pp
Load distribution in weighted complex networks
Creators: name: Goh, K. -I.
name: Noh, J. D.
name: Kahng, B.
name: Kim, D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the load distribution in weighted networks by measuring the effective number of optimal paths passing through a given vertex. The optimal path, along which the total cost is minimum, crucially depend on the cost distribution function $p_c(c)$. In the strong disorder limit, where $p_c(c)\sim c^{-1}$, the load distribution follows a power law both in the Erdős-Rényi (ER) random graphs and in the scale-free (SF) networks, and its characteristics are determined by the structure of the minimum spanning tree. The distribution of loads at vertices with a given vertex degree also follows the SF nature similar to the whole load distribution, implying that the global transport property is not correlated to the local structural information. Finally, we measure the effect of disorder by the correlation coefficient between vertex degree and load, finding that it is larger for ER networks than for SF networks.
description: 4 pages, 4 figures, final version published in PRE
Relacion de la concentracion economica y el tamano fisico en las explotaciones con empresario persona fisica
Creators: name: Ruiz-Maya, Luis
name: Ruiz-Maya, Luis
Publisher: name: Unknown
Year: 2006
Subjects: subject: Environmental Economics and Policy
subject: Institutional and Behavioral Economics
subject: Research Methods/ Statistical Methods
subject: Censos agrarios de 1982 y 1999
subject: orientaciones tecnico-economics
subject: empresario persona fisica
subject: concentracion economica
subject: indice de Gini
subject: coeficiente de asocialcion de Spearman
subject: superficie y unidades ganaderas dominantes
subject: agrarian census of 1982 and 1999
subject: technical-economic orientation
subject: entrepreneur physical person
subject: economic concentration
subject: Gini index
subject: Spearman's rank correlation coefficient
subject: area and livestock Animal Units dominants

description: Utilizando la informacion elemental de los Censos Agrarios de 1982 y 1999 se estudia la relacion de la concentracion economica con la dimension fisica de las explotaciones agrarias con empresario persona fisica. Como consecuencia del analisis se contrastan las hipotesis de existencia de una pauta de comportamiento aplicable se contrastan las hipotesis de existencia de una pauta de comportamiento aplicable a todas las Oreintaciones Tecnico- Economicas y la opinion de que "a mayor dimension mayor concentracion"...Using the elementary information found on the Agrarian Censuses of 1982 and 1999, the study focuses on the relation of the economic concentration with the physical dimension of agrarian exploitations, with an entrepreneur physical person. As a result of the analysis, the hypotheses of existence of a behavioral pattern applicable to al Technical-Economic Orientations and the opinion that "greater dimension equals greater concentration", are verified against observations.
Violation of Lorentz invariance and dynamical effects in high energy gamma rays
Creators: name: Castorina, P.
name: Iorio, A.
name: Zappala', D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The relation between the violation of Lorentz invariance and the dynamical effects in high energy gamma rays production is discussed. By using the framework of noncommutative classical electrodynamics, it is shown that full dynamical calculations are required to put bounds on the Lorentz violating scale by the phenomenological analysis of these processes as, for example, the synchrotron radiation from the CRAB nebula. It is observed that an improvement of the present bound on the scale of noncommutativity can be obtained only by astrophysical observations of gamma ray spectra in strong magnetic fields such as pulsars.
description: 5 pages, Contribution to the conference: "GZK and Surroundings", CRIS 2004, 5/31 - 6/4 2004 Catania, Italy
Prospect for precision quantum logic spectroscopy of vibrational overtone transitions in molecular oxygen ions
Creators: name: Wolf, Fabian
name: Heip, Jan C.
name: Zawierucha, Maximilian J.
name: Shi, Chunyan
name: Ospelkaus, Silke
name: Schmidt, Piet O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Precision spectroscopy has been the driving force for progress of our physical understanding and still is a promising tool for the investigation of new physics. Molecules offer transitions which allow tests that are not possible in atomic systems. However, usually precision spectroscopy of molecules is challenging due to the lack of cycling transitions for state preparation and state detection. For molecular ions, this obstacle can be overcome by quantum logic spectroscopy, where dissipation for state preparation and detection is provided by a co-trapped atomic ion exploiting the shared eigenstates of motion. Here, we propose a full quantum logic spectroscopy scheme for molecular oxygen ions and theoretically investigate the feasibility of quantum logic assisted state detection and preparation. Furthermore, we provide coupling rates for a direct single-photon quadrupole excitation of a vibrational overtone transition that can serve as a sensitive transition for tests of a possible variation of the proton-to-electron mass ratio.
Strange quark asymmetry in the nucleon and the NuTeV anomaly
Creators: name: Alwall, Johan
name: Ingelman, Gunnar
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The NuTeV anomaly of a non-universal value of the fundamental parameter sin^2θ_W in the electroweak theory has been interpreted as an indication for new physics beyond the Standard Model. However, the observed quantity depends on a possible asymmetry in the momentum distributions of strange quarks and antiquarks in the nucleon. This asymmetry occurs naturally in a phenomenologically successful physical model for such parton distributions, which reduces the NuTeV result to only about two standard deviations from the Standard Model.
description: 4 pages, 5 figures, RevTex4. Updated with new references and extended discussion. v.3: Minor corrections made
title: Artist in residence
Creators: name: Kastrati, Ardiana
Publisher: name: TU Wien
Year: 2017
Subjects: subject: Architekturentwurf
subject: architectural design

description: Die Diplomarbeit mit dem Titel Artist in Residence ist ein Temporäres Kunst-Gebäude das aus Holzkonstruktion besteht. Hier handelt es sich um einen Objekt, in den die Künstler arbeiten, ausstellen und wohnen werden. Alle Aktivitäten die in diesem Haus stattfinden werden sind miteinander verbunden, d.h. die Wohnräumlichkeiten können in Ausstellungsräume verwandelt werden, genauso wie die Atelier Räume in Wohnräume, sowie in Räumlichkeiten zur Zwecke von Kunstpublikationen, KunstWorkshops und andere wichtige Kunstaktivitäten gewandelt werden können. Dieses Temporäres-Objekt soll ein wichtiges Objekt in den Städten werden in dem die Kunst eine wichtige Rolle spielt. u.a. das Objekt ist so bedacht, sowohl in den urbane Lokationnen als auch in Rurale Gegend anpassend zu sein/werden! Dieses Objekt wird so realisiert das den Künstlern die volle Freiheit bieten soll, deren Kreativität und Energie effizient umsetzen lässt und gleichzeitig das Objekt erlaubt schnell eine Umgestaltung des ganzem zum Erfüllung unterschiedlichster Kunst Zwecke.
description: The Master Thesis is named 'Artist in Residence' and it is a Temporary Art Building, wich is constructed by Wood Construction. This is a space where artists can live, create and exhibit. Other activities that can be organized in this building are also art workshops, art publications, and also activities that art is the highlight of it. The 'Artist in Residence' Building, is planned to be part of different Cities in different times ... Being part of this building, would give a chance to the artists to create and live in a different way as usually, and also, to have an effective period of them career.
Real- and imaginary-time evolution with compressed quantum circuits
Creators: name: Lin, Sheng-Hsuan
name: Dilip, Rohit
name: Green, Andrew G.
name: Smith, Adam
name: Pollmann, Frank
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The current generation of noisy intermediate scale quantum computers introduces new opportunities to study quantum many-body systems. In this paper, we show that quantum circuits can provide a dramatically more efficient representation than current classical numerics of the quantum states generated under non-equilibrium quantum dynamics. For quantum circuits, we perform both real- and imaginary-time evolution using an optimization algorithm that is feasible on near-term quantum computers. We benchmark the algorithms by finding the ground state and simulating a global quench of the transverse field Ising model with a longitudinal field on a classical computer. Furthermore, we implement (classically optimized) gates on a quantum processing unit and demonstrate that our algorithm effectively captures real time evolution.
description: 7 pages, 6 figures (+appendix: 4 pages, 5 figures) references added
On Biased Compression for Distributed Learning
Creators: name: Beznosikov, Aleksandr
name: Horváth, Samuel
name: Richtárik, Peter
name: Safaryan, Mher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In the last few years, various communication compression techniques have emerged as an indispensable tool helping to alleviate the communication bottleneck in distributed learning. However, despite the fact biased compressors often show superior performance in practice when compared to the much more studied and understood unbiased compressors, very little is known about them. In this work we study three classes of biased compression operators, two of which are new, and their performance when applied to (stochastic) gradient descent and distributed (stochastic) gradient descent. We show for the first time that biased compressors can lead to linear convergence rates both in the single node and distributed settings. We prove that distributed compressed SGD method, employed with error feedback mechanism, enjoys the ergodic rate $O\left( δL \exp \left[-\frac{μK}{δL}\right] + \frac{(C + δD)}{Kμ}\right)$, where $δ\ge 1$ is a compression parameter which grows when more compression is applied, $L$ and $μ$ are the smoothness and strong convexity constants, $C$ captures stochastic gradient noise ($C=0$ if full gradients are computed on each node) and $D$ captures the variance of the gradients at the optimum ($D=0$ for over-parameterized models). Further, via a theoretical study of several synthetic and empirical distributions of communicated gradients, we shed light on why and by how much biased compressors outperform their unbiased variants. Finally, we propose several new biased compressors with promising theoretical guarantees and practical performance.
description: 50 pages, 9 figures, 5 tables, 22 theorems and lemmas, 7 new compression operators, 1 algorithm
Quantum-Classical Limit of Quantum Correlation Functions
Creators: name: Sergi, Alessandro
name: Kapral, Raymond
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A quantum-classical limit of the canonical equilibrium time correlation function for a quantum system is derived. The quantum-classical limit for the dynamics is obtained for quantum systems comprising a subsystem of light particles in a bath of heavy quantum particles. In this limit the time evolution of operators is determined by a quantum-classical Liouville operator but the full equilibrium canonical statistical description of the initial condition is retained. The quantum-classical correlation function expressions derived here provide a way to simulate the transport properties of quantum systems using quantum-classical surface-hopping dynamics combined with sampling schemes for the quantum equilibrium structure of both the subsystem of interest and its environment.
The role of ectomycorrhizal fungi in carbon transfer within common mycorrhizal networks
Creators: name: Philip, Leanne Jane
Publisher: name: University of British Columbia
Year: 2010

description: Ectomycorrhizae, one of the largest groups of mycorrhizal fungi, have low host specificity, colonizing mainly tree species in temperate forest systems worldwide. Because these fungi readily colonize many trees, hyphae form belowground connections between root systems of the same or different tree species whereby carbon and nutrients flow directly between rhizospheres. This biological phenomenon has been described as a consequence of common mycorrhizal networks and has been suggested as one potential factor in regulating composition and structure of plant communities. Ectomycorrhizae and belowground carbon transfer between paper birch (Betula papyrifera Marsh.) and Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) was studied in three laboratory studies and one field study to determine the role ectomycorrhizal fungi play in belowground carbon transfer between neighbouring mycorrhizal plants. Pot systems, root chambers, and pulse labeling [i.e labelling] were used in the laboratory to examine: (1) minimum detection levels required to detect belowground carbon transfer, (2) the magnitude and direction of carbon transfer through hyphal pathways compared to alternate soil pathways, and (3) the effects of fungal species on the magnitude of carbon transfer. Results from the laboratory show that >16 ml ¹³CO₂ and at least 10 μCi ¹⁴CO₂ pulse-labels are required to detect carbon transfer and is size dependent, that more net carbon transfer occurs when hyphal connections are left intact than not, and that fungal specificity tends to affect carbon transfer. Reciprocal isotopic labeling of paper birch and Douglas-fir in spring, summer and fall was used to determine phenological effects on the magnitude and direction of transfer. Carbon moved from paper birch to Douglas-fir in summer and in the opposite direction in spring and fall representing 4-34% net transfer (proportion of the total isotope assimilated in the system) through hyphal pathways. Phenology also affected carbon transfer through soil pathways. These laboratory and field findings support and extend previous studies in belowground carbon transfer, providing strong evidence for the role ectomycorrhizal fungi play in belowground transfer. Further studies are required to determine if transfer amounts observed in these experiments are of a sufficient magnitude to influence plant biodiversity, production, and fitness.
Supplemental Tables S1 - S4 from Skull morphology diverges between urban and rural populations of red foxes mirroring patterns of domestication and macroevolution
Creators: name: K. J. Parsons
name: Rigg, Anders
name: A. J. Conith
name: A. C. Kitchener
name: S. Harris
name: Haoyu Zhu
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: Table S1: Specimen identification numbers along with sex, habitat classification, and location information for each Vulpes vulpes skull used. Specimens are housed in National Museums Collections Centre in Edinburgh, Scotland.; Table S2: Anatomical definitions of landmark points used to measure the shape of fox skulls.; Table S3: Sample sizes for each of the Vulpini species used for morphological landmarks.; Table S4: Variation explained by the first six principal components derived from the dorsal and ventral aspects of Vulpini.
Quantum number projection at finite temperature via thermofield dynamics
Creators: name: Tanabe, K.
name: Nakada, H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Applying the thermo field dynamics, we reformulate exact quantum number projection in the finite-temperature Hartree-Fock-Bogoliubov theory. Explicit formulae are derived for the simultaneous projection of particle number and angular momentum, in parallel to the zero-temperature case. We also propose a practical method for the variation-after-projection calculation, by approximating entropy without conflict with the Peierls inequality. The quantum number projection in the finite-temperature mean-field theory will be useful to study effects of quantum fluctuations associated with the conservation laws on thermal properties of nuclei.
description: 27 pages, using revtex4, to be published in PRC
Ordering kinetics in q-state random-bond clock model: Role of Vortices and Interfaces
Creators: name: Chatterjee, Swarnajit
name: Sutradhar, Sabyasachi
name: Puri, Sanjay
name: Paul, Raja
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this article, we present a Monte Carlo study of phase transition and coarsening dynamics in the non-conserved two-dimensional random-bond $q$-state clock model (RBCM) deriving from a pure clock model [Phys. Rev. E 98, 032109 (2018)]. Akin to the pure clock model, RBCM also passes through two different phases when quenched from a disordered initial configuration representing at infinite temperature. Our investigation of the equilibrium phase transition affirms that both upper ($T_c^1$) and lower ($T_c^2$) phase transition temperatures decrease with bond randomness strength $ε$. Effect of $ε$ on the non-equilibrium coarsening dynamics is investigated following independent rapid quenches in the quasi-long range ordered (QLRO, $T_c^2 < T < T_c^1$) regime and long-range ordered (LRO, $T
La agricultura ecologica en Espana desde una perspectiva agroecologica
Creators: name: Gonzalez De Molina, Manuel
name: Alonso, Antonio M.
name: Guzman, Gloria I.
name: Gonzalez De Molina, Manuel
name: Alonso, Antonio M.
name: Guzman, Gloria I.
Publisher: name: Unknown
Year: 2007
Subjects: subject: Agricultural and Food Policy
subject: agricultura ecologica
subject: sostenibilidad
subject: agroecologiia
subject: organiz agricutlure
subject: sustainability
subject: agroecology.

description: La agricultura, tanato a escala mundial como de la Union Europea, esta suminda en una grave crisis, que tiene su origen en una compleja trama de problemas sociales (desempleo, envejecimiento de la poblacion rural...), economicos (incremento de los costes de produccion, perdoda de renta agraria) y ecologicos (contaminacion de agua, polucion del aire, erosion del suelo...). En este contexo, la Agroecologia se postula como un paradigma cientifico que puede de forma efectiva mejorar la sustentabilidad agraria. Este articulo presenta y analiza el desarrollo, los aportes y limitaciones de la agricultura ecologia para reducir las externalidades negativas sobre el medio ambiente...Agriculture is in crisis, worldwide as well as in the European Union. This crisis stems from a complex plot of social (unemployment, rural population ageing...). economic (increasing production costs, agrarian income losses...), and ecological (eater and air pollution, soil erosion...) problems. In this context, Agroecology is presented as a scientific paradigm that improves effectively agricultural sustainability. In this article, we present and analyze the development, contributions and limitations of organic farming to reduce environmental externalities.
Cybaeodes avolensis Platnick & Franco, 1992, new species
Creators: name: Platnick
name: Di Franco,
Publisher: name: Zenodo
Year: 1992
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Liocranidae
Cybaeodes
Cybaeodes avolensis

description: Cybaeodes avolensis, new species Figures 15-18 TYPES: Male holotype and female allotype taken in pitfall traps at Cava Grande di Avola, Siracusa, Sicily, Italy (Sept. 6-Oct. 12, 1989; A. Adomo), deposited in MCSN. ETYMOLOGY: The specific name refers to the type locality. DIAGNOSIS: Males of this species can be recognized by the combined presence of an irregularly shaped palpal tibia, a small tibial apophysis, and a short embolar projection (Figs. 15, 16); females can be recognized by wide, straight, sclerotized anterior epigynal ridge and two posterolateral tubercules (Fig. 17). MALE: Total length 4.44. Carapace 1.92 long, 1.51 wide. Femur 11 1.67 long. Eye sizes and interdistances: AME 0.05, ALE 0.05, PME 0.07, PLE 0.06; AME-AME 0.04, AME- ALE 0.02, PME-PME 0.09, PME-PLE 0.07, ALE-PLE 0.05; MOQ length 0.18, front width 0.18, back width 0.23. Leg spination: femora: II rO-0- 1; IV p0-0-1; tibiae II p0-1-0, v2-2 - 2. Median apophysis long, thick, pointed, curved distally (Fig. 15); retrolateral tibial apophysis small (Fig. 16). FEMALE: Total length 4.07. Carapace 1.85 long, 1.44 wide. Femur 11 1.30 long. Eye sizes and interdistances: AME 0.05, ALE 0.06, PME 0.05, PLE 0.05; AME-AME 0.06, AME- ALE 0.04, PME-PME 0.09, PME-PLE 0.09, ALE-PLE 0.06; MOQ length 0.18, front width 0.16, back width 0.20. Leg spination: femora: II rO-0-1; IV p0-0-1; tibiae II vl-3-3. Epigynum with wide anterior epigynal ridge (Fig. 17); vulva with large anterior saclike spermathecae and coiled median ducts (Fig. 18). OTHER MATERIAL EXAMINED: ITALY: Sicily: Siracusa: Cava Grande di Avola, pitfall traps, Sept. 6.-Nov. 15, 1989 (UC, AMNH), 76; Vendicari (Noto), pitfall traps, Sept. 18- Nov. 18, 1984 (UC), 36. DISTRIBUTION: Known only from Sicily.
description: Published as part of Platnick & Di Franco, 1992, On The Relationships of the Spider Genus Cybaeodes (Araneae, Dionycha), pp. 1-9 in American Museum Novitates 3053 on page 8, DOI: 10.5281/zenodo.814924
Nanoemulsion droplet diameter suggesting stability of the systems from Characterization of self-assembled silver nanoparticle Ink based on nanoemulsion method
Creators: name: Donghao Hu
name: Ogawa, Kazuyoshi
name: Kajiyama, Mikio
name: Enomae, Toshiharu
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 30399 Macromolecular and Materials Chemistry not elsewhere classified
subject: FOS: Chemical sciences
subject: 100799 Nanotechnology not elsewhere classified
subject: FOS: Nanotechnology

description: Fig. 1 Droplet diameter as a function of water content on surfactant blend-paraffin mixture of emulsions.
Noise feedback in an electronic circuit
Creators: name: Thibault, Karl
name: Gabelli, Julien
name: Lupien, Christian
name: Reulet, Bertrand
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electronic circuits are built by combining components with known current/voltage characteristics, which are intrinsic to each component and independent of the rest of the circuit. This approach breaks down for nanostructures placed at ultra-low temperature, a phenomenon referred to as Dynamical Coulomb Blockade, and usually attributed to quantum effects. Here we report similar phenomena on a simple circuit at room temperature, devoid of any quantum features: an avalanche diode in series with a resistor, where the current/voltage characteristics of the diode depends strongly on the value of the resistor. We show that the key ingredient for this is the feedback of the noise of the component on itself through the rest of the circuit. Moreover, we have developed a theory that links transport and noise in the presence of an external electromagnetic environment, which explains very well our experimental results.
description: 6 pages, 4 figures. Supplementary material of 4 pages, 3 figures
Supplemental Materials from Paradoxical aortic stiffening and subsequent cardiac dysfunction in Hutchinson–Gilford progeria syndrome
Creators: name: S.-I. Murtada
name: Y. Kawamura
name: A. W. Caulk
name: H. Ahmadzadeh
name: N. Mikush
name: K. Zimmerman
name: D. Kavanagh
name: D. Weiss
name: M. Latorre
name: Z. W. Zhuang
name: G. S. Shadel
name: D. T. Braddock
name: J. D. Humphrey
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 110601 Biomechanics
subject: FOS: Health sciences
subject: 90399 Biomedical Engineering not elsewhere classified
subject: FOS: Medical engineering

description: SUPPLEMENTAL TABLES AND FIGURES
Self-testing of physical theories, or, is quantum theory optimal with respect to some information-processing task?
Creators: name: Weilenmann, Mirjam
name: Colbeck, Roger
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Self-testing usually refers to the task of taking a given set of observed correlations that are assumed to arise via a process that is accurately described by quantum theory, and trying to infer the quantum state and measurements. In other words it is concerned with the question of whether we can tell what quantum black-box devices are doing by looking only at their input-output behaviour and is known to be possible in several cases. Here we introduce a more general question: is it possible to self-test a theory, and, in particular, quantum theory? More precisely, we ask whether within a particular causal structure there are tasks that can only be performed in theories that have the same correlations as quantum mechanics in any scenario. We present a candidate task for such a correlation self-test and analyse it in a range of generalised probabilistic theories (GPTs), showing that none of these perform better than quantum theory. A generalisation of our results showing that all non-quantum GPTs are strictly inferior to quantum mechanics for this task would point to a new way to axiomatise quantum theory, and enable an experimental test that simultaneously rules out such GPTs.
description: 6 pages; v2: close to published version; v3: typos corrected; v4: typo corrected in winning condition of game; v5: small error corrected in Figure 3
Tipologia de las explotaciones agrarias y criterios de gestion. Aplicacion a la horticultura de la Region de Murcia
Creators: name: Colino Sueiras, Jose
name: Miguel Martinez Paz, Jose
name: Martinez-Carrasco Pleite, Federico
name: Colino Sueiras, Jose
name: Miguel Martinez Paz, Jose
name: Martinez-Carrasco Pleite, Federico
Publisher: name: Unknown
Year: 2007
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: horticultura
subject: tipologia estructural
subject: criterios de gestion
subject: horticulture
subject: structural typology
subject: management criteria

description: El objetivo de este trabajo es especificar los criterios de gestion y planificacion de la actividad horticola en la Region de Murcia, contrastando ademas la hipotesis de que las diversas caracteristicas estructurales de las explotaciones agrarias son determinantes de distintas estrategias gerenciales. Para ello -y a partir de los datos de una encuesta realizada a una muestra de horticultores de la Region de Murcia- se plantea una metodologia de analisis en tres fases. En la primera, se establece una tipologia de las explotaciones horticolas regionales mediante un analisis cluster en dos etapas. En segundo lugar, se verifica la capacidad de los vectores de decision empresarial para explicar la formacion de las agrupaciones delimitadas en la fase anterior, utilizando la tecnica del analisis discriminante. Por ultimo, se examinan, a traves del recurso a pruebas simples de distancias y diferencias de medias, las divergencias existentes entre los criterios de decision de cada uno de los grupos, definiendo, a modo de conclusion, un patron del comportamiento estrategico de gestion para los diferentes modelos estrucurales de explotaciones horticolas de la Region de Murcia...The aim of this work is the establishment of the criteria of management and planning in the horticultural activity of Murcia's area. Same time, the hypothesis that the diverse structural characteristics of the agrarian farms are determining different management strategies is contrasted. From the data of a survey made to a representative sample of horticultural farmers of the Region of Murcia, a methodology of analysis in three phases is implemented. Firstly, a typology of the regional horticulture farms is carried out using a two stages cluster analysis. Secondly, the capacity of the vectors of enterprise decision is verified to explain the formation of the groupings specified in the previous phase, using the technique of discriminant analysis. Finally, using some tests of distances and differences of averages, the divergences between the criteria of decision of each one of the groups are analyzed. As a mayor conclusion, a pattern of the strategic behaviour of management for the different structural models from horticulture farms of the Region of Murcia is presented.
Supplementary Material: On the coupling of mechanics with bioelectricity and its role in morphogenesis
Creators: name: A. Leronni
name: L. Bardella
name: L. Dorfmann
name: A. Pietak
name: M. Levin
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Biophysics
subject: Biological Engineering
subject: 110601 Biomechanics
subject: FOS: Health sciences

description: It provides details on the finite volume discretization of the Cauchy-Navier equations involving bioelectrical forces, and on the mechanical response of the cell membrane affecting the opening of ion channels.
What does a vector field know about volume?
Creators: name: Geiges, Hansjörg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R30, 37C10, 53C22, 53D35, 57R25, 58A10

description: This note provides an affirmative answer to a question of Viterbo concerning the existence of nondiffeomorphic contact forms that share the same Reeb vector field. Starting from an observation by Croke-Kleiner and Abbondandolo that such contact forms define the same total volume, we discuss various related issues for the wider class of geodesible vector fields. In particular, we define an Euler class of a geodesible vector field in the associated basic cohomology and give a topological characterisation of vector fields with vanishing Euler class. We prove the theorems of Gauss-Bonnet and Poincaré-Hopf for closed, oriented 2-dimensional orbifolds using global surfaces of section and the volume determined by a geodesible vector field. This volume is computed for Seifert fibred 3-manifolds and for some transversely holomorphic flows.
description: 23 pages
How to simulate the quasi-stationary state
Creators: name: de Oliveira, Marcelo Martins
name: Dickman, Ronald
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: For a large class of processes with an absorbing state, statistical properties of the surviving sample attain time-independent values in the quasi-stationary (QS) regime. We propose a practical simulation method for studying quasi-stationary properties, based on the equation of motion governing the QS distribution. The method is tested in applications to the contact process. At the critical point, our method is about an order of magnitude more efficient than conventional simulation.
description: 9 pages, 4 figures
Cybaeodes alicatai Platnick & Franco, 1992, new species
Creators: name: Platnick
name: Di Franco,
Publisher: name: Zenodo
Year: 1992
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Liocranidae
Cybaeodes
Cybaeodes alicatai

description: Cybaeodes alicatai, new species Figures 21, 22 TYPE: Female holotype from Oued Zeed (Ain Draham), Tunisia (June 13, 1969; P. Alicata), deposited in MCSN. ETYMOLOGY: The specific name is a patronym in honor of the collector. DIAGNOSIS: Females can be recognized by the small, curved anterior epigynal ridge and the lateral, sac-shaped spermathecae (Figs. 21, 22). MALE: Unknown. FEMALE: Total length 4.07. Carapace 1.55 long, 1.03 wide. Femur 11 1. 15 long. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.06, PLE 0.09; AME-AME 0.02, AME- ALE 0.02, PME-PME 0.08, PME-PLE 0.06, ALE-PLE 0.02; MOQ length 0. 14, front width 0.09, back width 0.16. Leg spination: tibiae II v 1-2 -1. Epigynum with long, sinuous posteromedial ridges (Fig. 21); vulva with lateral sac-shaped spermathecae (Fig. 22). OTHER MATERIAL EXAMINED: TUNISIA: Col des Ruines (Ain Draham), June 13, 1969 (P. Alicata, AMNH), 19. DISTRIBUTION: Known only from Tunisia.
description: Published as part of Platnick & Di Franco, 1992, On The Relationships of the Spider Genus Cybaeodes (Araneae, Dionycha), pp. 1-9 in American Museum Novitates 3053 on page 8, DOI: 10.5281/zenodo.814924
On first-species counterpoint theory
Creators: name: Arias-Valero, Juan Sebastián
name: Agustín-Aquino, Octavio A.
name: Lluis-Puebla, Emilio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 00A65, 13C99, 05A99

description: We generalize first-species counterpoint theory to arbitrary rings and obtain some new counting and maximization results that enrich the theory of admitted successors, pointing to a structural approach, beyond computations. The generalization encompasses an alternative theory of contrapuntal intervals. We also propose several variations of the model that intend to deepen into its principles. The original motivations of the theory, as well as all technical passages, are carefully reviewed so as to provide a complete exposition.
description: Major revision. 45 pages, 2 figures
A barrier principle at infinity for varifolds with bounded mean curvature
Creators: name: Gama, Eddygledson Souza
name: de Lira, Jorge H. S.
name: Mari, Luciano
name: de Medeiros, Adriano A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: Our work investigates varifolds $Σ\subset M$ in a Riemannian manifold, with arbitrary codimension and bounded mean curvature, contained in an open domain $Ω$. Under mild assumptions on the curvatures of $M$ and on $\partial Ω$, also allowing for certain singularities of $\partial Ω$, we prove a barrier principle at infinity, namely we show that the distance of $Σ$ to $\partial Ω$ is attained on $\partial Σ$. Our theorem is a consequence of sharp maximum principles at infinity on varifolds, of independent interest.
description: 38 pages, revised version. Some arguments have been clarified, typos corrected. Accepted in J. London Math. Soc
Towards quantum simulation of Sachdev-Ye-Kitaev model
Creators: name: Cao, Ye
name: Zhou, Yi-Neng
name: Shi, Ting-Ting
name: Zhang, Wei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study a simplified version of the Sachdev-Ye-Kitaev (SYK) model with real interactions by exact diagonalization. Instead of satisfying a continuous Gaussian distribution, the interaction strengths are assumed to be chosen from discrete values with a finite separation. A quantum phase transition from a chaotic state to an integrable state is observed by increasing the discrete separation. Below the critical value, the discrete model can well reproduce various physical quantities of the original SYK model, including the volume law of the ground-state entanglement, level distribution, thermodynamic entropy, and out-of-time-order correlation (OTOC) functions. For systems of size up to $N=20$, we find that the transition point increases with system size, indicating that a relatively weak randomness of interaction can stabilize the chaotic phase. Our findings significantly relax the stringent conditions for the realization of SYK model, and can reduce the complexity of various experimental proposals down to realistic ranges.
description: 7 pages, 5 figures
Stochastic relativistic shock-surfing acceleration
Creators: name: Chandran, Benjamin D. G.
name: Bessho, Naoki
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study relativistic particles undergoing surfing acceleration at perpendicular shocks. We assume that particles undergo diffusion in the component of momentum perpendicular to the shock plane due to moderate fluctuations in the shock electric and magnetic fields. We show that dN/dE, the number of surfing-accelerated particles per unit energy, attains a power-law form, dN/dE \propto E^{-b}. We calculate b analytically in the limit of weak momentum diffusion, and use Monte Carlo test-particle calculations to evaluate b in the weak, moderate, and strong momentum-diffusion limits.
description: 20 pages, 6 figures, accepted by ApJ; this version corrects a few minor typographical errors