cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Harmonic frequency combs in quantum cascade lasers: time-domain and frequency-domain theory
Creators: name: Wang, Yongrui
name: Belyanin, Alexey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Harmonic frequency combs, in which the lasing modes are separated by a period of tens of free spectral ranges from each other, have been recently discovered in quantum cascade lasers (QCLs). There is an ongoing debate how the harmonic combs can be formed and stable under continuous pumping. Here we reproduce the harmonic state of lasing in QCLs by space-time-domain numerical simulations and show that the corresponding optical wave has a frequency-modulated (FM) nature, with the fundamental beat note in the electron population being suppressed. To understand the physics behind the formation and stability of the harmonic state, we develop a frequency-domain linearized analytic theory which analyzes the stability of single mode lasing with respect to the harmonic state formation and the instabilities of the resulting harmonic state. Our analysis shows how the instability of a single lasing mode can result in the growth of harmonic side modes. The coupling between the two side modes leads to opposite gains for FM and amplitude-modulated (AM) waves, and the FM gain is enhanced as compared to the AM gain. The dependence of the sideband gain spectrum on group velocity dispersion is also studied. While the instability gain of a single lasing mode does not prove that the harmonic state can be self-starting, we analyze the sideband instability gain in the presence of three strong harmonic modes and demonstrate that the harmonic state can be stable and self-supported.
description: 32 pages, 11 figures
Physical Structure of Planetary Nebulae. III. The Large and Evolved NGC 1360
Creators: name: Goldman, Daniel B.
name: Guerrero, Martin A.
name: Chu, You-Hua
name: Gruendl, Robert A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: NGC 1360 is a large planetary nebula (PN) without an obvious shell morphology. We have analyzed H-alpha images and high-dispersion echelle spectra of NGC 1360 in order to construct spatio-kinematic models and to determine its density distribution. The best-fit model indicates that NGC 1360 is a prolate ellipsoidal shell whose major axis is twice as long as its minor axis and is tilted by 60 arcdeg with respect to the line of sight. The large kinematic age of the shell, ~10,000 yr, and the low density of the nebula, <130 H-atom cm^-3, imply that NGC 1360 is an evolved PN and has begun to merge with the interstellar medium. The observed morphology and surface brightness profiles of NGC 1360 can be described well as a thick shell with a Gaussian radial density profile without a sharp inner edge, indicating a lack of on-going compression by a fast stellar wind. The FLIERs observed in NGC 1360 near the end of its major axis expand faster and are younger than the nebular shell.
description: 5 pages, 5 figures
Modeling disk fragmentation and multiplicity in massive star formation
Creators: name: Oliva, G. André
name: Kuiper, Rolf
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the formation and early evolution and fragmentation of an accretion disk around a forming massive protostar. We use a grid-based self-gravity-radiation-hydrodynamics code including a sub-grid module for stellar and dust evolution. On purpose, we do not use sink particles to allow for all paths of fragment formation and destruction, but instead keeping the spatial grid resolution high enough to properly resolve the physical length scales of the problem. We use a 3D grid in spherical coordinates with a logarithmic scaling in the radial direction and cosine scaling in the polar direction. Because of that, roughly 25% of the total number of grid cells, corresponding to $\sim$ 26 million grid cells, are used to model the disk physics. They constitute the highest resolution simulations performed up to now on disk fragmentation around a forming massive star with the physics considered here. We study the convergence of our results by performing the same simulation for 5 different resolutions. We start from the collapse of a molecular cloud; a massive (proto)star is formed in its center, surrounded by a fragmenting Keplerian-like accretion disk with spiral arms. The fragments have masses of $\sim 1 M_\odot$, and their continuous interactions with the disk, spiral arms and other fragments results in eccentric orbits. Fragments form hydrostatic cores, surrounded by secondary disks with spiral arms that also produce new fragments. We identified several mechanisms of fragment formation, interaction and destruction. Central temperatures of the fragments can reach the hydrogen dissociation limit, form second Larson cores and evolve into companion stars. Based on this, we study the multiplicity predicted by the simulations and find $\sim 6$ companions at different distances from the primary: from possible spectroscopic multiples, to companions at distances between 1000 and 2000 au.
description: Accepted for publication in Astronomy & Astrophysics
Ab initio path integral Monte Carlo simulation of the Uniform Electron Gas in the High Energy Density Regime
Creators: name: Dornheim, Tobias
name: Moldabekov, Zhandos
name: Vorberger, Jan
name: Groth, Simon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The response of the uniform electron gas (UEG) to an external perturbation is of paramount importance for many applications. Recently, highly accurate results for the static density response function and the corresponding local field correction have been provided both for warm dense matter [\textit{J.~Chem.~Phys.}~\textbf{151}, 194104 (2019)] and strongly coupled electron liquid [\textit{Phys.~Rev.~B}~\textbf{101}, 045129 (2020)] conditions based on exact \textit{ab initio} path integral Monte Carlo (PIMC) simulations. In the present work, we further complete our current description of the UEG by exploring the high energy density regime, which is relevant for, e.g., astrophysical applications and inertial confinement fusion experiments. To this end, we present extensive new PIMC results for the static density response in the range of $0.05 \leq r_s \leq 0.5$ and $0.85\leqθ\leq8$. These data are subsequently used to benchmark the accuracy of the widely used random phase approximation and the dielectric theory by Singwi, Tosi, Land, and Sjölander (STLS). Moreover, we compare our results to configuration PIMC data where they are available and find perfect agreement with a relative accuracy of $0.001-0.01\%$. All PIMC data are available online.
The Maurer-Cartan structure of BRST differential
Creators: name: Gao, Jining
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Commutative Algebra (math.AC)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we construct a new sequence of generators of the BRST complex and reformulate the BRST differential so that it acts on elements of the complex much like the Maurer-Cartan differential acts on left-invariant forms. Thus our BRST differential is formally analogous to the differential defined on the BRST formulation of the Chevalley-Eilenberg cochain complex of a Lie algebra. Moreover, for an important class of physical theories, we show that in fact the differential is a Chevalley-Eilenberg differential. As one of the applications of our formalism, we show that the BRST differential provides a mechanism which permits us to extend a nonintegrable system of vector fields on a manifold to an integrable system on an extended manifold.
FOOD PRESERVATIVE RISK ASSESSMENT
Creators: name: Abdullayeva, D.G.
name: Abulkasimov, S.A.
Publisher: name: Zenodo
Year: 2025

description: Sulfitizing agents such as sulfur dioxide and sodium and potassium salts of bisulfite, sulfite, and metabisulfite are used as preservatives in food, beverages, and pharmaceuticals. It is known that patients with allergic diseases, including bronchial asthma, often experience clinical symptoms after eating foods containing sulfonating substances. In many regions of the world, sulfites are now among the potential allergens that should be labeled on food and beverages.
Atomic-scale mechanisms for magnetostriction in CoFe$_2$O$_4$ and La$_{0.5}$Sr$_{0.5}$CoO$_3$ oxides determined by differential x-ray absorption spectroscopy
Creators: name: Subías, G.
name: Cuartero, V.
name: García, J.
name: Blasco, J.
name: Pascarelli, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The atomic environments involved in the magnetostriction effect in CoFe$_2$O$_4$ and La$_{0.5}$Sr$_{0.5}$CoO$_3$ polycrystalline samples have been identified by differential extended x-ray absorption fine structure (DiffEXAFS) spectroscopy. We demonstrate that cobalt atoms at octahedral sites are responsible for their magnetostriction. The analysis of DiffEXAFS data indicates that the local-site magnetostrictive strains of Co atoms are reversed in these two oxides, in agreement with the macroscopic magnetostriction. For the CoFe$_2$O$_4$ spinel, a large negative strain along the (100) direction has been determined for the CoO$_6$ octahedron causing a tetragonal contraction in contrast with the La$_{0.5}$Sr$_{0.5}$CoO$_3$ perovskite, where a positive moderate strain along the (100) direction was found resulting in a tetragonal expansion. The different local-site magnetostriction is understood in terms of the different valence and spin state of the Co atoms for the two oxides. The macroscopicmagnetostriction would be explained then by the relative change in volume, either contraction in CoFe$_2$O$_4$ or expansion in La$_{0.5}$Sr$_{0.5}$CoO$_3$, when the tetragonal axis of the Co site is reoriented under an externally applied magnetic field.
Interplay of h/e and h/2e Oscillations in Gate-Controlled Aharonov-Bohm Rings
Creators: name: Shelykh, I. A.
name: Bagraev, N. T.
name: Galkin, N. G.
name: Klyachkin, L. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The spin-interference that is caused by the Rashba spin-orbit interaction in a gate-controlled Aharonov-Bohm ring is studied by the analysis of the conductance oscillations as a function of both the gate voltage and magnetic field. The scattering matrix approach is used to reveal the effect of the quantum scatterers connected to two one-dimensional leads on the phase of the transmission and reflection amplitudes. The variations of the transmission and reflection amplitudes that are caused by the quantum scatterers for the particles moving inside and outside rings are shown to define a parity of the and conductance oscillations.
description: 12 pages, 4 figures
Color flows for the process gg --> Bc + c + b-bar
Creators: name: Berezhnoy, A. V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The contributions of different color flows into the gluonic Bc-meson production cross section has been calculated. This study is essential to simulate Bc-meson production with the help of Pythia program. The essence of matter is that in the frame work of the Lund model used by Pythia the hadronization way of the final partons and hadronic remnants depends on the color flow type. The modified method for calculation of the color flow contributions has been proposed.
description: 16 pages, 5 figures, RevTeX4
Neutral and charged dark excitons in monolayer WS$_2$
Creators: name: Zinkiewicz, M.
name: Slobodeniuk, A. O.
name: Kazimierczuk, T.
name: Kapuściński, P.
name: Oreszczuk, K.
name: Grzeszczyk, M.
name: Bartos, M.
name: Nogajewski, K.
name: Watanabe, K.
name: Taniguchi, T.
name: Faugeras, C.
name: Kossacki, P.
name: Potemski, M.
name: Babiński, A.
name: Molas, M. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Low temperature and polarization resolved magneto-photoluminescence experiments are used to investigate the properties of dark excitons and dark trions in a monolayer of WS$_2$ encapsulated in hexagonal BN (hBN). We find that this system is an $n$-type doped semiconductor and that dark trions dominate the emission spectrum. In line with previous studies on WSe$_2$, we identify the Coulomb exchange interaction coupled neutral dark and grey excitons through their polarization properties, while an analogous effect is not observed for dark trions. Applying the magnetic field in both perpendicular and parallel configurations with respect to the monolayer plane, we determine the g-factor of dark trions to be $g\sim$-8.6. Their decay rate is close to 0.5 ns, more than 2 orders of magnitude longer than that of bright excitons.
description: 6 pages, 6 figures, supplemental material
Guía de fuentes para el estudio de la reforma agraria liberal (1835-1880)
Creators: name: Alía Miranda, Francisco
name: Valle Calzado, Ángel Ramón Del
name: Alía Miranda, Francisco
name: Valle Calzado, Ángel Ramón Del
Publisher: name: Unknown
Year: 2004
Subjects: subject: Agricultural and Food Policy
subject: Agricultura
subject: fuentes
subject: historia contemporánea
subject: España
subject: s XIX
subject: Agriculture
subject: sources
subject: contemporary history
subject: Spain
subject: 19th century.

description: El estudio de la conocida como Reforma Agraria Liberal ha resultado fundamental para comprender el cambio de la sociedad del Antiguo Régimen al Estado Liberal. En este trabajo pretendemos estudiar las fuentes y documentación fundamental para su análisis y las aportaciones metodológicas más recientes y, por tanto, que más han contribuido a renovar el conocimiento historiográfico de esta temática. Entre las fuentes estudiadas se incluyen las estadísticas, las fiscales, las jurídicas y las publicaciones periódicas (anuarios y boletines oficiales)...Research on the so-called Reforma Agraria Liberal has become fundamental to our understanding of social change between the Old Regime and the Liberal State. In this paper we propose a study of those sources and documents that are fundamental to its analysis and of some recent methodological contributions that have clearly allowed a renewal of our historiographic knowledge on this topic. The sources under scrutiny here include statistic, fiscal and judicial documents, periodicals (annals and official bulletins).
A Generalized Positive Energy Theorem for Spaces with Asymptotic SUSY Compactification
Creators: name: Xie, Naqing
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 53C99;58J60;83E99

description: A generalized positive energy theorem for spaces with asymptotic SUSY compactification involving non-symmetric data is proved. This work is motivated by the work of Dai [D1][D2], Hertog-Horowitz-Maeda [HHM], and Zhang [Z].
description: 13 pages, without figures; Some errors are corrected
Events as boosters of the regional economy
Creators: name: Krammer, Laurey-Anne
name: Heijman, Wim
name: Krammer, Laurey-Anne
name: Heijman, Wim
Publisher: name: Unknown
Year: 2014
Subjects: subject: Community/Rural/Urban Development
subject: regional development
subject: jobs
subject: input-output analysis
subject: location quotient

description: Events are increasingly being used as a means to boost regional economic development through tourism, but are they truly effective to this end? In this article we attempted to answer this question by measuring the impact of the Christmas Festival ‘Magisch Maastricht’ on the economy of the municipality of Maastricht in the Netherlands. We used input output analysis by which we calculated the number of additional jobs per sector created by the spending of visitors during the event. The results show that the impact on the urban economy is significant.
description: http://dx.doi.org/10.7896/j.1403
El entramado de empresas almerienses de economía social dedicadas a la comercialización agraria: descripción, problemas generales y perspectivas de competitividad
Creators: name: Valenciano, Jaime De Pablo
name: Perezmesa, Juan Carlos
name: Valenciano, Jaime De Pablo
name: Perezmesa, Juan Carlos
Publisher: name: Unknown
Year: 2004
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Cluster
subject: productividad
subject: frutas
subject: hortalizas
subject: subasta
subject: exportación
subject: calidad
subject: AENOR
subject: productivity
subject: fruits
subject: vegetables
subject: auction
subject: exportation
subject: quality
subject: AENOR.

description: En la actualidad existe una clara divergencia entre la demanda y la oferta hortofruticola. Mientras que la primera ha experimentado una gran concentración, la segunda no ha sabido adaptarse a ese proceso. Esto ha originado la pérdida de poder de la oferta respecto a la demanda. El objetivo de este artículo es estudiar el presente y perspectivas futuras de las empresas hortofrutícolas de economía social, tomando como referencia Almería. Esta provincia es la principal exportadora de productos hortofrutícolas extratempranos de España...At present there is an important divergency between the supply and demand horticultural. While the first has experimented a large concentration, the second don´t know accommodation this process. The consequence has been to less of power the supply respect demand. The object of the present article is studied the prenet and future of Almeria horticultural firms. The province is the most important export of horticultural of Spain.
Simulación multicriterio de mercados de agua de regadío: el caso de la cuenca del Duero
Creators: name: Martinez, Yolanda Martinez
name: Rodriguez, Jose A. Gomez-Limon
name: Martinez, Yolanda Martinez
name: Rodriguez, Jose A. Gomez-Limon
Publisher: name: Unknown
Year: 2004
Subjects: subject: Environmental Economics and Policy
subject: Mercados de agua
subject: teoría de la utilidad multiatributo
subject: agua de riego
subject: Duero (España)
subject: Water markets
subject: multi-attribute utility theory
subject: irrigation water
subject: Duero valley (Spain).

description: Este trabajo desarrolla una metodología multicriterio para la simulación del mercado de agua de riego en el ámbito de una cuenca. Para ello se parte del supuesto que los regantes tratan de optimizar con sus decisiones productivas (plan de cultivos) una función de utilidad multiatributo, sometidos a una serie de restricciones que dependen de las condiciones estructurales de sus explotaciones. Así, se han definido una serie de grupos homogéneos de agricultores en relación con el uso del agua como los agentes «tipo» a considerar de forma conjunta en el modelo mercado. Dicho modelo calcula el equilibrio del mercado a través de la solución que maximiza el bienestar agregado, cuantificado como la suma de las utilidades multiatributo alcanzadas por cada uno de los agentes participantes. Esta metodología se pone en práctica para la cuenca del Duero (España), obteniéndose como principal resultado que la introducción de esta institución aumenta significativamente la eficiencia económica y la generación en empleo agrario, especialmente en circunstancias de escasez (sequías)...This paper develops a multi-criteria methodology to simulate irrigation water markets at basin level. For this purpose it is assumed that irrigators try to optimise personal multi-attribute utility functions with their productive decision making (crop mix), subjected to a set of constraints based upon the structural features of their farms. In this sense, farmers with homogeneous behaviour about water use have been grouped, being this groups established as agents «type» to be considered in the whole model for water market simulation. This model for market simulation calculates the equilibrium through a solution that maximises the aggregate welfare, quantified as the sum of the multi-attribute utilities reached by each one of the participating agents. This methodology has been empirically applied for the Duero basin (Northern Spain), obtaining as main result that the implementation of this institution increases economic efficiency and agricultural labour demand, particularly during shortage periods (droughts).
TimingCamouflage+: Netlist Security Enhancement with Unconventional Timing (with Appendix)
Creators: name: Zhang, Grace Li
name: Li, Bing
name: Li, Meng
name: Yu, Bei
name: Pan, David Z.
name: Brunner, Michaela
name: Sigl, Georg
name: Schlichtmann, Ulf
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: With recent advances in reverse engineering, attackers can reconstruct a netlist to counterfeit chips by opening the die and scanning all layers of authentic chips. This relatively easy counterfeiting is made possible by the use of the standard simple clocking scheme, where all combinational blocks function within one clock period, so that a netlist of combinational logic gates and flip-flops is sufficient to duplicate a design. In this paper, we propose to invalidate the assumption that a netlist completely represents the function of a circuit with unconventional timing. With the introduced wave-pipelining paths, attackers have to capture gate and interconnect delays during reverse engineering, or to test a huge number of combinational paths to identify the wave-pipelining paths. To hinder the test-based attack, we construct false paths with wave-pipelining to increase the counterfeiting challenge. Experimental results confirm that wave-pipelining true paths and false paths can be constructed in benchmark circuits successfully with only a negligible cost, thus thwarting the potential attack techniques.
Universal behavior of giant electroresistance in epitaxial La0.67Ca0.33MnO3 thin films
Creators: name: Zhao, Y. G.
name: Wang, Y. H.
name: Zhang, G. M.
name: Zhang, B.
name: Zhang, X. P.
name: Yang, C. X.
name: Lang, P. L.
name: Zhu, M. H.
name: Guan, P. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report a giant resistance drop induced by dc electrical currents in La0.67Ca0.33MnO3 epitaxial thin films. Resistance of the patterned thin films decreases exponentially with increasing current and a maximum drop shows at the temperature of resistance peak Tp. Variation of resistance with current densities can be scaled below and above Tp, respectively. This work can be useful for the future applications of electroresistance.
description: 13 pages, 4 figures
Alternatives to Seesaw
Creators: name: Murayama, Hitoshi
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The seesaw mechanism is attractive not only because it "explains'' small neutrino mass, but also because of its packaging with the SUSY-GUT, leptogenesis, Dark Matter, and electroweak symmetry breaking. However, this package has the flavor, CP, and gravitino problems. I discuss two alternatives to the seesaw mechanism. In one of them, the anomaly-mediated supersymmetry breaking solves these problems, while predicts naturally light Dirac neutrinos. In the other, the light Majorana neutrinos arise from supersymmetry breaking with right-handed neutrinos below TeV, and the Dark Matter and collider phenomenology are significantly different.
description: Talk at Fujihara Seminar On Neutrino Mass And Seesaw Mechanism (SEESAW 1979-2004), 23-25 Feb 2004, KEK. 14 pages, uses espcrc2.sty
Quantum self-learning Monte Carlo with quantum Fourier transform sampler
Creators: name: Endo, Katsuhiro
name: Nakamura, Taichi
name: Fujii, Keisuke
name: Yamamoto, Naoki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The self-learning Metropolis-Hastings algorithm is a powerful Monte Carlo method that, with the help of machine learning, adaptively generates an easy-to-sample probability distribution for approximating a given hard-to-sample distribution. This paper provides a new self-learning Monte Carlo method that utilizes a quantum computer to output a proposal distribution. In particular, we show a novel subclass of this general scheme based on the quantum Fourier transform circuit; this sampler is classically simulable while having a certain advantage over conventional methods. The performance of this "quantum inspired" algorithm is demonstrated by some numerical simulations.
description: 11 pages, 7 figures
Single-atom detection using whispering gallery modes of microdisk resonators
Creators: name: Rosenblit, Michael
name: Horak, Peter
name: Helsby, Steve
name: Folman, Ron
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the possibility of using dielectric microdisk resonators for the optical detection of single atoms trapped and cooled in magnetic microtraps near the surface of a substrate. The bound and evanescent fields of optical whispering gallery modes are calculated and the coupling to straight waveguides is investigated using finite-difference time domain solutions of Maxwell's equations. Results are compared with semi-analytical solutions based on coupled mode theory. We discuss atom detection efficiencies and the feasibility of non-destructive measurements in such a system depending on key parameters such as disk size, disk-waveguide coupling, and scattering losses.
description: 10 pages, 10 fugures
Adaptive Structural Hyper-Parameter Configuration by Q-Learning
Creators: name: Zhang, Haotian
name: Sun, Jianyong
name: Xu, Zongben
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Tuning hyper-parameters for evolutionary algorithms is an important issue in computational intelligence. Performance of an evolutionary algorithm depends not only on its operation strategy design, but also on its hyper-parameters. Hyper-parameters can be categorized in two dimensions as structural/numerical and time-invariant/time-variant. Particularly, structural hyper-parameters in existing studies are usually tuned in advance for time-invariant parameters, or with hand-crafted scheduling for time-invariant parameters. In this paper, we make the first attempt to model the tuning of structural hyper-parameters as a reinforcement learning problem, and present to tune the structural hyper-parameter which controls computational resource allocation in the CEC 2018 winner algorithm by Q-learning. Experimental results show favorably against the winner algorithm on the CEC 2018 test functions.
Caracterización económica de las cooperativas forestales en Castilla y León
Creators: name: Gilbaja, Rocío González
name: Morate, Ernesto Casquet
name: Baltiero, Luis Díaz
name: Gilbaja, Rocío González
name: Morate, Ernesto Casquet
name: Baltiero, Luis Díaz
Publisher: name: Unknown
Year: 2004
Subjects: subject: Environmental Economics and Policy
subject: Cooperativas
subject: economía forestal
subject: Castilla y León
subject: empresa forestal
subject: Cooperatives
subject: forest industries
subject: Castilla y Léon.

description: Además de su importancia en el ámbito de la producción, las cooperativas juegan un papel vertebrador en una Comunidad Autónoma tan extensa y escasamente poblada como Castilla y León. En este trabajo se han analizado las cooperativas asociadas a un sector que no suele estudiarse por separado, como es el sector forestal, y que presenta unas características marcadamente diferentes a otros sectores próximos como pueden ser el agrícola y el ganadero. A través de los datos aportados por diferentes fuentes y con la ayuda de una encuesta, se han caracterizado las empresas cooperativas forestales en esta autonomía, en función de diversas variables. Además, se han analizado los aspectos financieros de estas empresas, obteniéndose unos ratios medios que se han comprobado son diferentes a los que muestran tanto las cooperativas agrarias como las empresas forestales. Finalmente, se ha realizado un análisis estratégico sobre la situación de estas empresas...Besides their importance as production agents, cooperatives play an integrative role in an extensive and barely populated region as Castilla y León. In this work the cooperatives associated to the forest sector have been analyzed. It should stand out that these cooperatives are not usually studied separately from other cooperatives. They show some characteristics different from related economic sectors as the agrarian sector. Based on data collected from different sources and with the aid of a survey, the forest cooperatives have been characterized in this region, considering diverse variables. In addition, the financial aspects of these organizations have been analyzed, obtaining average ratios which differ from those that characterize agrarian cooperatives as well as forest non-cooperatives enterprises. Finally, a strategic analysis of these cooperatives it has been carried out using S.W.O.T. methodology.
Validity of PI-NLIs for Latinx parents (Cycyk & Huerta, 2020)
Creators: name: Cycyk, Lauren M.
name: Huerta, Lidia
Publisher: name: ASHA journals
Year: 2020
Subjects: subject: Language
subject: 200209 Multicultural, Intercultural and Cross-cultural Studies
subject: FOS: Other humanities

description: Purpose: This study addressed the cultural, linguistic, and contextual validity of parent-implemented naturalistic language interventions for young children from Latinx homes. Parents’ perspectives on the acceptability of commonly delivered intervention procedures were explored.Method: Thirty-seven parents from Spanish-speaking Latinx backgrounds with children under the age of 6 years participated. Four focus groups were completed. Parents responded to 14 procedures regarding the intervention implementers, settings, activities, strategies, and language. Structural and emergent coding was used to explore procedural acceptability and parents’ rationales for perceiving each procedure as acceptable, not acceptable, or neutral.Results: Substantial intracultural variability in parents’ acceptance of specific procedures and the reasons for their perspectives was observed. Parents’ perspectives evinced both individualist and collectivist orientations toward child language development. Several suggestions regarding promising adaptations for early language interventions that may overlap with evidence-based parent-implemented naturalistic language intervention procedures emerged.Conclusion: The findings highlight the variability within the Latinx community that is likely to impact the cultural validity of early language interventions for children and families from this background. Considerations for enhancing interventions to achieve cultural congruency and promote child outcomes are provided.
Supplemental Material S1. Focus group discussion guide.
Cycyk, L. M., & Huerta, L. (2020). Exploring the cultural validity of parent-implemented naturalistic language intervention procedures for families from Spanish-speaking Latinx homes. American Journal of Speech-Language Pathology, 29(3), 1241-1259. https://doi.org/10.1044/2020_AJSLP-19-00038
Publisher Note: This article is part of the Forum: Innovations in Clinical Practice for Dual Language Learners, Part 2.
Macroscopic quantum effects in a strongly driven nanomechanical resonator
Creators: name: Peano, V.
name: Thorwart, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the nonlinear response of a vibrating suspended nanomechanical beam on external periodic driving. The amplitude of the fundamental transverse mode behaves thereby like a weakly damped quantum particle in a driven anharmonic potential. Upon using a Born-Markovian master equation, we calculate the fundamental mode amplitude for varying driving frequencies. In the nonlinear regime, we observe resonances which are absent in the corresponding classical model. They are shown to be associated with resonant multi-phonon excitations. Furthermore, we identify resonant tunneling in a dynamically induced bistable effective potential.
description: 5 pages, replaced with the published version
A Superpolynomial Version of Nonsymmetric Jack Polynomials
Creators: name: Dunkl, Charles F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C52, 20C30

description: Superpolynomials consist of commuting and anti-commuting variables. By considering the anti-commuting variables as a module of the symmetric group the theory of vector-valued nonsymmetric Jack polynomials can be specialized to superpolynomials. The theory significantly differs from the supersymmetric Jack polynomials introduced and studied in several papers by Desrosiers, Mathieu and Lapointe (Nucl. Phys. B606, 2001). The vector-valued Jack polynomials arise in standard modules of the rational Cherednik algebra and were originated by Griffeth (T.A.M.S. 362, 2010) for the family G(n,p,N) of complex reflection groups. In the present situation there is an orthogonal basis of anti-commuting polynomials which corresponds to hook tableaux arising in Young's representations of the symmetric group. The basis is then used to construct nonsymmetric Jack polynomials by specializing the machinery set up in a paper by Luque and the author (SIGMA 7,2011). There is an inner product for which these polynomials form an orthogonal basis, and the squared norms are explicitly found. Supersymmetric polynomials are obtained as linear combinations of the nonsymmetric Jack polynomials contained in a submodule; this is based on an idea of Baker and Forrester (Ann. Comb. 3, 1999). The Poincaré series for supersymmetric polynomials graded by degree is obtained and is interpreted in terms of certain minimal polynomials. There is a brief discussion of antisymmetric polynomials and an application to wavefunctions of the Calogero-Moser quantum model on the circle.
description: 28 pages
Solution of the Schroedinger equation with one and two dimensional double-well potentials
Creators: name: Koc, Ramazan
name: Haydargil, Derya
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Schroedinger equation with one and two dimensional potentials are solved in the frame work of the sl(2) Lie algebra. Eigenfunctions of the Schroedinger equation for various asymmetric double-well potentials have been determined and the eigenstates are expressed in terms of the orthogonal polynomials. The solution of the double-well potential in two dimension have been analyzed.
title: The challenges of utility-scale PV plant development in Ukraine
Creators: name: Dehtiarov, Yurii
Publisher: name: TU Wien
Year: 2018
Subjects: subject: challenges
subject: utility-scale
subject: PV plant
subject: development
subject: Ukraine
subject: challenges
subject: utility-scale
subject: PV plant
subject: development
subject: Ukraine

description: In the modern world power production and its sources play the fundamental role in economic development and state security. In the 20th century electricity demand was provided with fossil fuel power plants and the greatest breakthrough was done by nuclear power. Nowadays many countries including Ukraine face the challenge of nuclear power replacement before or after its operation expire date with new sources of renewable age. The purpose of this paper is to show whether cost competitive utility scale solar PV power plants deployment in Ukraine could help in replacement nuclear power in till 2035. Thus the core objectives of this paper is to assess the electricity demand in Ukraine till 2035 caused by nuclear power phase out as well as the cost-competitive potential of utility scale solar PV power plants to cover such demand, barriers and policy instruments for realisation of such potential. These objectives were reached by data collection method and comparison approach of nuclear and solar PV power costs as well as assessment of current and suggested incentive solar PV support instruments. This research shows that current balance of Ukraine electricity mix and electricity generation in peak load period as well as current incentive solar PV policy will constrain PV deployment in Ukraine after 2020 and would not make considerable impact on nuclear power replacement. Nuclear power with its base load function and low flexibility are strongly colliding with solar PV power and will constrain REN development in Ukraine. Only investment oriented changes in solar PV policy could partly bring positive results to nuclear power replacement with solar power by 2035.
Andeocalynda Hennemann & Conle 2020, n. gen.
Creators: name: Hennemann, Frank H.
name: Conle, Oskar V.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Phasmida
Diapheromeridae
Andeocalynda

description: Keys to Andeocalynda n. gen. and supposedly closely related genera
♀♀
1. Median segment at least ¼ the length of metanotum; South America............................................. 2
 - Median segment short, <1/6 the length of metanotum; Central America.................................... Calynda
2. Gonoplacs small and at best slightly projecting beyond apex of anal segment...................................... 3
 - Gonoplacs strongly enlarged, expanded dorsoventrally, paddle-shaped and extending considerably beyond apex of anal segment; Coastal Lomas of W-Peru.................................................................. Laciphorus
 3. Head elongate, vertex flattened; median segment short, <½ the length of metanotum; subgenital plate very long and lancet-like with the apex acutely pointed; Andean regions of Ecuador & Colombia.......................... Andeocalynda n. gen.
 - Head ovoid, vertex ± convex; median segment> ½ the length of metanotum; subgenital plate with apex blunt or sub-angular; S-Ecuador, Peru & Bolivia.................................................................... Globocalynda
♂♂
1. Median segment at least ¼ the length of metanotum; South America............................................. 2
 - Median segment short, <1/6 the length of metanotum; Central America.................................... Calynda
2. Anal segment without posterolateral protuberances; cerci at best equal in length to anal segment...................... 3
 - Posterolateral angles of anal segment protruded into a digitiform, ventrad directed process; cerci longer than anal segment and 90° angled inward; Coastal Lomas of W-Peru..................................... Laciphorus
 3. Head elongate, vertex flattened; median segment short, <½ the length of metanotum; anal segment slender; poculum small and at best reaching posterior margin of abdominal tergum IX; Andean regions of Ecuador & Colombia.... Andeocalynda n. gen.
 - Head ovoid, vertex ± convex; median segment> ½ the length of metanotum; anal segment with lateral surfaces inflated and broadly excavated posteromedially; poculum bulgy and ± reaching to apex of anal segment S-Ecuador, Peru & Bolivia.............................................................................................. Globocalynda
description: Published as part of Hennemann, Frank H. & Conle, Oskar V., 2020, Studies on Neotropical Phasmatodea XXIV: Andeocalynda n. gen., a new genus of Andean stick insects, with the descriptions of nine new species from Colombia and Ecuador (Phasmatodea: " Anareolatae ": Diapheromeridae: Diapheromerinae), pp. 301-341 in Zootaxa 4896 (3) on pages 305-306, DOI: 10.11646/zootaxa.4896.3.1, http://zenodo.org/record/4383779
Gentiana (sect. Kudoa) Toyok.
Creators: name: Favre, Adrien
name: Pringle, James S.
name: Heckenhauer, Jacqueline
name: Kozuharova, Ekaterina
name: Gao, Qingbo
name: Lemmon, Emily Moriarty
name: Lemmon, Alan R.
name: Sun, Hang
name: Tkach, Natalia
name: Gebauer, Sebastian
name: Sun, Shan-Shan
name: Fu, Peng-Cheng
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Gentianaceae
Gentiana

description: Gentiana sect. Kudoa (Masam.) Satake & Toyok. ex Toyok.
in J. Jap. Bot. 35: 202. 1960 ≡ Kudoa Masam. in J. Soc. Trop. Agric. 2: 29. 1930 –
Type: Gentiana yakushimensis Makino.
= Gentiana sect. Isomeria Kusn. in Trudy S.-Peterburgsk. Obshch. Estestvoisp., Otd. Bot. 24(2): 198. 1894, pro parte ≡ Gentiana subg. Isomeria (Kusn.) Halda in Acta Mus. Richnov., Sect. Nat. 3(1): 26. 1995, pro parte – Type: Gentiana depressa D.Don.
(Continues)
= Gentiana [sect. Frigida] ser. Verticillatae C.Marquand in Bull. Misc. Inform. Kew 1937: 158. 1937 [“ Gentiana ser. Verticillatae (C.Marquand) T.N.Ho ” in Bull. Bot. Res., Harbin 5(4): 11. 198. Ho erroneously called her taxonomic assignment of ser. Verticillatae into sect. Monopodiae a “comb. nov.”] ≡ Gentiana [sect. Frigida ser. Ornatae] subser. Verticillatae (C.Marquand) Harry Sm. in Kew Bull. 15(1): 54. 1961 ≡ Gentiana sect. Verticillatae (C.Marquand) Halda in Acta Mus. Richnov., Sect. Nat. 3(1): 26. 1995 – Type: Gentiana hexaphylla Maxim. ex Kusn.
= Gentiana [sect. Frigida] ser. Ornatae C.Marquand in Bull. Misc. Inform. Kew 1937: 159. 1937 [“ Gentiana ser. Ornatae (C.Marquand) T.N.Ho ” in Bull. Bot. Res., Harbin 5(4): 11. 1985. Ho erroneously called her taxonomic assignment of ser. Ornatae into sect. Monopodiae a “comb. nov.”] ≡ Gentiana [sect. Frigida ser. Ornatae] subser. Oppositifoliae Harry Sm. in Kew Bull. 15(1): 54. 1961 ≡ Gentiana sect. Ornatae (C.Marquand) Halda in Acta Mus. Richnov., Sect. Nat. 3(1): 26. 1995 – Type: Gentiana sinoornata Balf.f.
= Gentiana subsect. Monopodiae Harry Sm. in Kew Bull. 15(1): 43. 1961, pro parte ≡ Gentiana sect. Monopodiae (Harry Sm.) T.N.Ho in Bull. Bot. Res., Harbin 5(4): 10. 1985, pro parte ≡ Gentiana subg. Monopodiae (Harry Sm.) Halda in Acta Mus. Richnov., Sect. Nat. 3(1): 25. 1995, pro parte – Type: Gentiana cephalantha Franch. ex Hemsl.
= Gentiana [sect. Isomeria] ser. Stragulatae T.N.Ho in Bull. Bot. Res., Harbin 5(4): 13. 1985 ≡ Gentiana sect. Stragulatae (T.N.Ho) Halda in Acta Mus. Richnov., Sect. Nat. 3(1): 26. 1995 – Type: Gentiana stragulata Balf.f. & Forrest ex C.Marquardt.
Thirty species in the Himalayas, China, Japan.
description: Published as part of Favre, Adrien, Pringle, James S., Heckenhauer, Jacqueline, Kozuharova, Ekaterina, Gao, Qingbo, Lemmon, Emily Moriarty, Lemmon, Alan R., Sun, Hang, Tkach, Natalia, Gebauer, Sebastian, Sun, Shan-Shan & Fu, Peng-Cheng, 2020, Phylogenetic relationships and sectional delineation within Gentiana (Gentianaceae), pp. 1221-1238 in TAXON 69 (6) on pages 1229-1231, DOI: 10.1002/tax.12405, http://zenodo.org/record/14047337
La promoción de nuevas empresas en el medio rural. Análisis de la incidencia del Leader II en la provincia de Huelva
Creators: name: Ruiz-Maya, Luis
name: Ruiz-Maya, Luis
Publisher: name: Unknown
Year: 2004
Subjects: subject: Agribusiness
subject: Farm Management
subject: concentracion economica de las explotaciones
subject: margen bruto total
subject: indice de Gini
subject: empresario persona fisca
subject: orientaciones teenico-economicas
subject: economic concentration of agricultural holdings
subject: total gross margin
subject: Gini index
subject: natural-person owner
subject: types of farming.

description: La promoción de nuevas empresas en el medio rural. Análisis de la incidencia del Leader II en la provincia de Huelva...The paper examines, for the period 1982-1999, the behaviour of the economic concentration of agricultural holding based on their Total Gross margin and classidied according to their principal Type of farming and the farming sector as a whole; municipal Gini indices are also calculated. Intercensal changes for each type and censal changes between types are assessed. The paper sets out the systematic changes that have taken place in index distributions. These changes reflect change in agricultural holding structure. Inequality in the economic distribution of dominant-agriculture holdings rose slightly over the period, but decreased remarkable in the dominant livestock activity. The only explanation for these developments must be sought in structural change, in particular, the notable retreat of sheep, goat and other dominant grazing-livestock agricultural holdings. Finally, concentration of cropping and livestock also decreased. The salient point of the intra-censal results is the change in the order of magnitude of the overall indices. While in 1982 the economic concentration of the dominant Agriculture was significantly less than that of Livestock, by 1999 the reverse was the case.
Un parti paysan dans la ville en Bolivie : le Mouvement vers le socialisme (MAS) à La Paz (2005-2010)
Creators: name: Do Alto, Hervé
name: Do Alto, Hervé
Publisher: name: Unknown
Year: 2011
Subjects: Community/Rural/Urban Development
Political Economy

description: The takeover of the Bolivian presidency by the peasant trade-unionist Evo Morales and his party, the Movement towards Socialism (MAS), in 2005 not only marked the return of the left into the national political arena, but illustrates as well the raise, begun in the mid 90s, of the peasantry as an autonomous protagonist of Bolivian politics, in a context of growing urbanisation. This article focuses on the political and social conditions prior to the electoral triumph of MAS in a supposedly hostile environment: the cities. On the basis of an ethnographic research carried out within the working-class districts of La Paz, this work aims to show how a particular partisan configuration that favours its rural membership acts as a constraint for the party’s implantation in urban areas. Nevertheless, this fact does not turn into an obstacle, mainly due to the control that MAS holds on public jobs, which plays a key role in maintaining internal discipline in the cities.
Realizations of the osp(2,1) Superalgebra and Related Physical Systems
Creators: name: Tutunculer, Hayriye
name: Koc, Ramazan
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Eigenvalues and eigenfunction of two-boson 2x2 Hamiltonians in the framework of the superalgebra osp(2,1) are determined by presenting a similarity transformation. The Hamiltonians include two bosons and one fermion have been transformed in the form of the one variable differential equations and the conditions for its solvability have been discussed. It is observed that the Hamiltonians of the various physical systems can be written in terms of the generators of the osp(2,1) superalgebra and under some certain conditions their eigenstates can exactly be obtained. In particular, the procedure given here is useful in determining eigenstates of the Jaynes-Cummings Hamiltonians.