cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
An origin for the main pulsation and overtones of SGR1900+14 during the August 27 (1998) superoutburst
Creators: name: Cuesta, Herman J. Mosquera
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The crucial observation on the occurrence of subpulses (overtones) in the Power Spectral Density of the August 27 (1998) event from SGR1900+14, as discovered by BeppoSAX (Feroci et al. 1999), has received no consistent explanation in the context of the competing theories to explain the SGRs phenomenology: the magnetar and accretion-driven models. Based on the ultra-relativistic, ultracompact X-ray binary model introduced in the accompanying paper (Mosquera Cuesta 2004a), I present here a self-consistent explanation for such an striking feature. I suggest that both the fundamental mode and the overtones observed in SGR1900+14 stem from pulsations of a massive white dwarf (WD). The fundamental mode (and likely some of its harmonics) is excited because of the mutual gravitational interaction with its orbital companion (a NS, envisioned here as point mass object) whenever the binary Keplerian orbital frequency is a multiple integer number ($m$) of that mode frequency (Pons et al. 2002). Besides, a large part of the powerful irradiation from the fireball-like explosion occurring on the NS (after partial accretion of disk material) is absorbed in different regions of the star driving the excitation of other multipoles (Podsiadlowski 1991,1995), i.e., the overtones (fluid modes of higher frequency). Part of this energy is then reemitted into space from the WD surface or atmosphere. This way, the WD lightcurve carries with it the signature of these pulsations inasmuch the way as it happens with the Sun pulsations in Helioseismology. It is shown that our theoretical prediction on the pulsation spectrum agrees quite well with the one found by BeppoSAX (Feroci et al. 1999). A feature confirmed by numerical simulations (Montgomery & Winget 2000).
description: This paper was submitted as a "Letter to the Editor" of MNRAS in July 17/2004. Since that time no answer or referee report was provided to the Author [MNRAS publication policy limits reviewal process no longer than one month (+/- half more) for the reviewal of this kind of submission]. I hope this contribution is not receiving a similar "peer-reviewing" as given to the A. Dar and A. De Rujula's "Cannonball model for gamma-ray bursts", or to the R.K. Williams' "Penrose process for energy extraction from rotating black holes". The author welcomes criticisms and suggestions on this paper
Detecting Dark Matter Annihilation with CMB Polarization : Signatures and Experimental Prospects
Creators: name: Padmanabhan, Nikhil
name: Finkbeiner, Douglas P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Dark matter (DM) annihilation during hydrogen recombination (z ~ 1000) will alter the recombination history of the Universe, and affect the observed CMB temperature and polarization fluctuations. Unlike other astrophysical probes of DM, this is free of the significant uncertainties in modelling galactic physics, and provides a method to detect and constrain the cosmological abundances of these particles. We parametrize the effect of DM annihilation as an injection of ionizing energy at a rate e_{dm}, and argue that this simple "on the spot'' modification is a good approximation to the complicated interaction of the annihilation products with the photon-electron plasma. Generic models of DM do not change the redshift of recombination, but change the residual ionization after recombination. This broadens the surface of last scattering, suppressing the temperature fluctuations and enhancing the polarization fluctuations. We use the temperature and polarization angular power spectra to measure these deviations from the standard recombination history, and therefore, indirectly probe DM annihilation. (abridged)
description: 13 pages, 8 figures, submitted to PRD
Massive graviton as a testable cold dark matter candidate
Creators: name: Dubovsky, S. L.
name: Tinyakov, P. G.
name: Tkachev, I. I.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a consistent model of gravity where the tensor graviton mode is massive, while linearized equations for scalar and vector metric perturbations are not modified. The Friedmann equation acquires an extra dark-energy component leading to accelerated expansion. The mass of the graviton can be as large as $\sim (10^{15}{cm})^{-1}$, being constrained by the pulsar timing measurements. We argue that non-relativistic gravitational waves can comprise the cold dark matter and may be detected by the future gravitational wave searches.
description: 4 pages, final version to appear in PRL
Planes de acción de Cambio Climático y edificación sostenible (WEBINAR 25/09/2020)
Creators: name: Vega, Celia Bueno
Publisher: name: Zenodo
Year: 2020

description: Presentación en webinar de SOCLIMPACT el 25/09/2020 para la comunidad online Principales temas: El pacto de las alcaldías para el clima y la energía. Elaboración de los planes. Inventario de emisiones de referencia. Herramienta de evaluación de consumos municipales. Inventario de emisiones de referencia. Información directa para la web del pacto de las alcaldías Acciones de mitigación. Herramienta de trabajo, fuentes de financiación. Seguimiento y monitorización. Fechas de acciones de mitigación. Elaboración del plan de acción. Técnicas de mejora de la calificación energética de edificios para su certificación en Canarias ¿Cómo alcanzar letras A y B?. Estudio realizado. Cuadro resumen. Mejora de la certificación. Análisis de la certificación energética en edificios existentes en Canarias: Problemas y soluciones. La importancia del ACS en la certificación para Canarias. Instalaciones de ACS: Termo eléctrico, solar térmica, aerotermia, caldera de biomasa. Conclusiones
Ground-state properties of dilute spinless fermions in fractional dimensions
Creators: name: Pastukhov, V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We analyze zero-temperature universal properties of the simplest Galilean-invariant model of spinless low-dimensional fermions with short-range two-body interactions. In particular, it is shown that after proper renormalization of the coupling constant, even the dilute system possesses rich phase diagram that includes the superfluid state and the metastable `upper branch' behavior.
description: 5+epsilon pages, 5 figures, comments (criticism) are welcome
Phonon scattering and stability of Na_0.5CoO_2
Creators: name: Zhang, X. N.
name: Lemmens, P.
name: Gnezdilov, V.
name: Choi, K. Y.
name: Keimer, B.
name: Chen, D. P.
name: Lin, C. T.
name: Chou, F. C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Raman scattering experiments have been performed on Na_xCoO_2 as function of temperature at the composition x=0.5 where a structural instability and a metal-insulator transition have been observed. Three additional phonon modes are observed compared to samples with larger x. An in-situ annealing study (T_max=550 K) with the initial presence of water vapor at ambient conditions reveals an irreversible structural instability of this composition.
description: 2 pages, 2 figures, proceeding of the SCES'04, July 2004, further information see http://www.peter-lemmens.de
Behavioristische Analyse des Verbraucherverhaltens in der landwirtschaftlichen Direktvermarktung
Creators: name: Heer, Ines M.
name: Heer, Ines M.
Publisher: name: Unknown
Year: 2008
Subjects: subject: Consumer/Household Economics
subject: Demand and Price Analysis
subject: Institutional and Behavioral Economics
subject: consumer behavior
subject: direct marketing
subject: econometric model

description: Scandals in the food industry have caused uncertainty about quality and innocuousness of food for many consumers. Direct marketing of products by farmers may be an important way to strengthen consumers´ confidence. In this article, the buyer is focus of the analysis. In contrast to other studies, the purchasing changes are examined. The objective is the development of an econometric model and the development of strategies for direct marketing.
Additional file 1 of The association between a fracture risk tool and frailty: Geelong Osteoporosis Study
Creators: name: Tembo, Monica C.
name: Holloway-Kew, Kara L.
name: Mohammadreza Mohebbi
name: Sui, Sophia X.
name: Hosking, Sarah M.
name: Brennan-Olsen, Sharon L.
name: Williams, Lana J.
name: Kotowicz, Mark A.
name: Pasco, Julie A.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Evolutionary Biology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: Additional file 1. Table A.1
Potential gain as a centrality measure
Creators: name: De Meo, Pasquale
name: Levene, Mark
name: Provetti, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: I.2.8; F.2.1

description: Navigability is a distinctive features of graphs associated with artificial or natural systems whose primary goal is the transportation of information or goods. We say that a graph $\mathcal{G}$ is navigable when an agent is able to efficiently reach any target node in $\mathcal{G}$ by means of local routing decisions. In a social network navigability translates to the ability of reaching an individual through personal contacts. Graph navigability is well-studied, but a fundamental question is still open: why are some individuals more likely than others to be reached via short, friend-of-a-friend, communication chains? In this article we answer the question above by proposing a novel centrality metric called the potential gain, which, in an informal sense, quantifies the easiness at which a target node can be reached. We define two variants of the potential gain, called the geometric and the exponential potential gain, and present fast algorithms to compute them. The geometric and the potential gain are the first instances of a novel class of composite centrality metrics, i.e., centrality metrics which combine the popularity of a node in $\mathcal{G}$ with its similarity to all other nodes. As shown in previous studies, popularity and similarity are two main criteria which regulate the way humans seek for information in large networks such as Wikipedia. We give a formal proof that the potential gain of a node is always equivalent to the product of its degree centrality (which captures popularity) and its Katz centrality (which captures similarity).
description: In Proceedings of Web Intelligence 2019 (WI19), the IEEE/WIC/ACM International Conference on Web Intelligence, pages 418--422. arXiv admin note: text overlap with arXiv:1812.08012
Search for Higgs Bosons Decaying into b anti-b and Produced in Association with a Vector Boson in Proton-Antiproton Collisions at 1.8 TeV
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a new search for $H^{0}V$ production, where $H^0$ is a scalar Higgs boson decaying into $b\bar{b}$ with branching ratio $β$, and $V$ is a $Z^{0}$ boson decaying into $e^{+}e^{-}$, $μ^{+}μ^{-}$, or $ν\barν$. This search is then combined with previous searches for $H^{0}V$ where $V$ is a $W^{\pm}$ boson or a hadronically decaying $Z^{0}$. The data sample consists of $106 \pm 4$ pb$^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV accumulated by the Collider Detector at Fermilab. Observing no evidence of a signal, we set 95% Bayesian credibility level upper limits on $σ(p\bar{p}\to H^{0}V)\timesβ$. For $H^0$ masses of 90, 110 and 130 GeV/$c^{2}$, the limits are 7.8, 7.2, and 6.6 pb respectively.
description: 6 pages, 3 figures, to be submiited to PRL
Elastizitäten der Nachfrage privater Haushalte nach Nahrungsmitteln – Schätzung eines AIDS auf Basis der Einkommens- und Verbrauchsstichprobe 2003
Creators: name: Thiele, Silke
name: Thiele, Silke
Publisher: name: Unknown
Year: 2008
Subjects: subject: Demand and Price Analysis
subject: food demand
subject: elasticities
subject: Germany
subject: AIDS

description: This paper presents price and income elasticities of food demand in Germany. Using cross sectional data from the 2003 German income and consumption survey a Linear Approximate Almost Ideal Demand System is employed. Two aspects which have to be taken into account when using cross-sectional data are insufficient price information and zero expenditures. An approach of COX and WOHLGENANT (1986) is applied to derive quality adjusted prices. In order to take into account censoring of the dependent variables a procedure of SHONKWILER and YEN (1999) was employed. A high expenditure elasticity is found for meat demand. The highest own-price elasticities are for the demand for meat/-products and milk/-products. Within the meat group, beef demand shows a particular low own-price elasticity. The cross-price elasticities indicate more complementary relationships than was expected. Elasticity analyses differentiated by household groups suggest that elasticities for meat differ between these groups.
Additional file 1 of Objective cognitive performance and subjective complaints in patients with chronic Q fever or Q fever fatigue syndrome
Creators: name: Reukers, Daphne F. M.
name: Aaronson, Justine
name: Loenhout, Joris A. F. Van
name: Meyering, Birte
name: Velden, Koos Van Der
name: Hautvast, Jeannine L. A.
name: Jaarsveld, Cornelia H. M. Van
name: Kessels, Roy P. C.
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1 : Table 1. Diagnostic criteria for QFS and chronic Q fever.
Optical response of a ferromagnetic/DMS hybrid structure
Creators: name: Redlinski, P.
name: Wojtowicz, T.
name: Rappoport, T. G.
name: Libal, A.
name: Furdyna, J. K.
name: Janko, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the possibility of using local magnetic fields to produce one-dimensional traps in hybrid structures for any quasiparticle possessing spin degree of freedom. We consider a system composed of a diluted magnetic semiconductor quantum well buried below a micron-sized ferromagnetic island. Localized magnetic field is produced by a rectangular ferromagnet in close proximity of a single domain phase. We make quantitative predictions for the optical response of the system as a function of distance between the micromagnet and the quantum well, electronic g-factor, and thickness of the micromagnet.
description: Submitted to Applied Physics Letters, 3 pages, 4 figures
Spin-Orbit-Induced Topological Flat Bands in Line and Split Graphs of Bipartite Lattices
Creators: name: Ma, Da-Shuai
name: Xu, Yuanfeng
name: Chiu, Christie S.
name: Regnault, Nicolas
name: Houck, Andrew A.
name: Song, Zhida
name: Bernevig, B. Andrei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Topological flat bands, such as the band in twisted bilayer graphene, are becoming a promising platform to study topics such as correlation physics, superconductivity, and transport. In this work, we introduce a generic approach to construct two-dimensional (2D) topological quasi-flat bands from line graphs and split graphs of bipartite lattices. A line graph or split graph of a bipartite lattice exhibits a set of flat bands and a set of dispersive bands. The flat band connects to the dispersive bands through a degenerate state at some momentum. We find that, with spin-orbit coupling (SOC), the flat band becomes quasi-flat and gapped from the dispersive bands. By studying a series of specific line graphs and split graphs of bipartite lattices, we find that (i) if the flat band (without SOC) has inversion or $C_2$ symmetry and is non-degenerate, then the resulting quasi-flat band must be topologically nontrivial, and (ii) if the flat band (without SOC) is degenerate, then there exists an SOC potential such that the resulting quasi-flat band is topologically nontrivial. This generic mechanism serves as a paradigm for finding topological quasi-flat bands in 2D crystalline materials and meta-materials.
Hedging von Mengenrisiken in der Landwirtschaft – Wie teuer dürfen „ineffektive“ Wetterderivate sein?
Creators: name: Musshoff, Oliver
name: Hirschauer, Norbert
name: Musshoff, Oliver
name: Hirschauer, Norbert
Publisher: name: Unknown
Year: 2008
Subjects: subject: Farm Management
subject: Financial Economics
subject: Risk and Uncertainty
subject: weather derivatives
subject: rainfall risk
subject: willingness-to-pay
subject: portfolio optimization
subject: hedging of volumetric risk

description: Since the mid-nineties, agricultural economists discuss the suitability of “weather derivatives” as hedging instruments for volumetric risks in agriculture. Contrary to traditional insurance contracts, the payoffs of such derivatives are linked to weather indices (e.g. accumulated rainfall or temperature over a certain period) that are measured objectively at a defined meteorological station. While weather derivatives thus circumvent the problem of moral hazard and adverse selection, weather derivative markets for the agricultural sector are still in their infancy all-over the world. Some economists attribute this to theoretical valuation problems and the lack of a pricing method which is accepted by all market participants. Others think that the low hedging effectiveness of (standardized and noncustomized) weather contracts cripple the market. Motivated by the question of how weather derivatives should be priced to agricultural firms, this paper describes a risk programming model which can be used to determine farmers’ willingness-to-pay (demand function) for weather derivatives. The model considers both the derivative’s farmspecific risk reduction capacity and the individual farmer’s risk acceptance. Applying it to the exemplary case of a Brandenburg farm reveals that even a highly standardized contract which is based on the accumulated rainfall at the capital’s meteorological station in Berlin-Tempelhof generates a relevant willingness-to-pay. We find that a potential underwriter could even add a loading on the actuarially fair price that exceeds the loading level of traditional insurances. Since transaction costs are low compared to insurance contracts, this indicates that there may be a significant trading potential.
Acciones de mitigación del Cambio Climático en sectores de uso intensivo de la energía en los territorios insulares (WEBINAR 25/09/2020)
Creators: name: Rivero, Pilar Navarro
Publisher: name: Zenodo
Year: 2020

description: Presentación en webinar de SOCLIMPACT el 25/09/2020 para la comunidad online Principales temas: Opciones tecnológicas para la generación de calor renovable en la reforma de edificios y apartamentos extrahoteleros. Estudios previos encomendados al ITC. Estructura de la oferta alojativa extrahotelera en Canarias. Marco regulatorio. Código técnico de la edificación, CTE, Documento Básico de Ahorro de Energía (20/12/2019. Estructura del documento. Fase1: Definición del establecimiento extrahotelero de estudio. Fase 2: Simulación dinámica (TRNSYS) del edificio de estudio. Fase 3: Simulación energética (TRNSYS) de las instalaciones térmicas en el edificio. Opciones tecnológicas para cubrir las demandas energéticas consideradas. Aerotermia: Bombas de calor aire-agua de alta temperatura para la producción de ACS Energía solar térmica y bomba de calor aire-agua de alta temperatura para la producción de ACS. Energía solar fotovoltaica. GEOTERMIA: Refrigeración mediante enfriadoras condensadas.por agua conectadas con pozos geotérmicos con recuperación de calor residual. Integración anual de resultados de la simulación dinámica (0,125 h) Evaluación de los factores que limitan alcanzar el objetivo de producción renovable y/o residual. Cubierta disponible. No simultaneidad entre el perfil diario de las demandas de calor y la radiación solar. Estacionalidad de la demanda energética para la climatización de piscinas. Factores de conversión de energía final a primaria y factores de emisión de CO2. Conclusiones.
Nanocrystallization and Amorphization Induced by Reactive Nitrogen Sputtering in Iron and Permalloy
Creators: name: Gupta, Rachana
name: Gupta, Mukul
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Thin films of iron and permalloy Ni80Fe20 were prepared using an Ar+N2 mixture with magnetron sputtering technique at ambient temperature. The nitrogen partial pressure, during sputtering process was varied in the range of 0 to 100%, keeping the total gas flow at constant. At lower nitrogen pressures RN2<33% both Fe and NiFe, first form a nanocrystalline structure and an increase in nitrogen partail pressure results in formation of an amorphous structure. At intermediate nitrogen partial pressures, nitrides of Fe and NiFe were obtained while at even higher nitrogen partial pressures, nitrides themselves became nanocrystalline or amorphous. The surface, structural and magnetic properties of the deposited films were studied using x-ray reflection and diffraction, transmission electron microscopy, polarized neutron reflectivity and using a DC extraction magnetometer. The growth behavior for amorphous film was found different as compared with poly or nanocrystalline films. The soft-magnetic properties of FeN were improved on nanocrystallization while those of NiFeN were degraded. A mechanism inducing nanocrystallization and amorphization in Fe and NiFe due to reactive nitrogen sputtering is discussed in the present article.
description: 13 Pages, 15 Figures
Does Information Network Affect Technology Diffusion?
Creators: name: Goswami, Rupak
name: Basu, Debabrata
name: Goswami, Rupak
name: Basu, Debabrata
Publisher: name: Unknown
Year: 2010
Subjects: subject: Consumer/Household Economics
subject: Crop Production/Industries
subject: Farm Management
subject: Teaching/Communication/Extension/Profession
subject: technology transfer
subject: agricultural information network
subject: social network analysis
subject: adoption decision
subject: India

description: Adoption research for many years has considered individual farmer as the basis of analysis, whereas, the effect of networks governing a farmer’s decision-making has received limited attention. Moreover, the spread of technology over different generation of adopters has not been addressed adequately. Hence, farmers’ position within the agricultural information networks and their adoption decision, may be studied to formulate some lower order propositions regarding the diffusion of agricultural innovations within social networks. The present study was conducted at Nadia District of West Bengal, India to study the spread of banana (Musa paradisiacal L.) and guava (Psidium guajava L.) cultivation among the farmers of selected villages. Case study method and focused group discussion was used to track this spread over different generations of adopters. Sociometric technique was employed to find out the network score of farmers in the agricultural information network. The fractional ranking of network scores of farmers was then compared with their relative earliness in the spread of banana and guava cultivation. It was found that both in the spread of banana and guava cultivation, most of the farmers who had higher network scores were earlier adopters of banana and guava cultivation practices and vice versa. This indicates the possible relations between farmers’ adoption-decision regarding new crops and their position in social networks.
description: Volume 6, Number 6
Subaru Mid-infrared Imaging of the Quadruple Lenses PG1115+080 and B1422+231: Limits on Substructure Lensing
Creators: name: Chiba, Masashi
name: Minezaki, Takeo
name: Kashikawa, Nobunari
name: Kataza, Hirokazu
name: Inoue, Kaiki Taro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present mid-infrared imaging at 11.7 mu m for the quadruple lens systems, PG1115+080 and B1422+231, using the cooled mid-infrared camera and spectrometer (COMICS) attached on the Subaru telescope. These lensed QSOs are characterized by their anomalous optical and radio flux ratios as obtained for (A1, A2) images of PG1115+080 and (A, B, C) images of B1422+231, respectively, i.e., such flux ratios are hardly reproduced by lens models with smooth mass distribution. Our mid-infrared observations for these images have revealed that the mid-infrared flux ratio A2/A1 of PG1115+080 is virtually consistent with smooth lens models (but inconsistent with the optical flux ratio), whereas for B1422+231, the mid-infrared flux ratios among (A, B, C) are in good agreement with the radio flux ratios. We also identify a clear infrared bump in the spectral energy distributions of these QSOs, thereby indicating that the observed mid-infrared fluxes originate from a hot dust torus around a QSO nucleus. Based on the size estimate of the dust torus, we place limits on the mass of a substructure in these lens systems, causing the anomalous optical or radio flux ratios. For PG1115+080, the mass of a substructure inside an Einstein radius, M_E, is < 16 Msun, corresponding to either a star or a low-mass CDM subhalo having the mass of M_{100}^{SIS} < 2.2 * 10^4 Msun inside radius of 100 pc if modeled as a singular isothermal sphere (SIS). For B1422+231, we obtain M_E > 209 Msun, indicating that a CDM subhalo is more likely, having the mass of M_{100}^{SIS} > 7.4 * 10^4 Msun
description: 9 pages, 4 figures, 4 tables, ApJ in press
Colonoscope tracking method based on shape estimation network
Creators: name: Oda, Masahiro
name: Roth, Holger R.
name: Kitasaka, Takayuki
name: Furukawa, Kazuhiro
name: Miyahara, Ryoji
name: Hirooka, Yoshiki
name: Navab, Nassir
name: Mori, Kensaku
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper presents a colonoscope tracking method utilizing a colon shape estimation method. CT colonography is used as a less-invasive colon diagnosis method. If colonic polyps or early-stage cancers are found, they are removed in a colonoscopic examination. In the colonoscopic examination, understanding where the colonoscope running in the colon is difficult. A colonoscope navigation system is necessary to reduce overlooking of polyps. We propose a colonoscope tracking method for navigation systems. Previous colonoscope tracking methods caused large tracking errors because they do not consider deformations of the colon during colonoscope insertions. We utilize the shape estimation network (SEN), which estimates deformed colon shape during colonoscope insertions. The SEN is a neural network containing long short-term memory (LSTM) layer. To perform colon shape estimation suitable to the real clinical situation, we trained the SEN using data obtained during colonoscope operations of physicians. The proposed tracking method performs mapping of the colonoscope tip position to a position in the colon using estimation results of the SEN. We evaluated the proposed method in a phantom study. We confirmed that tracking errors of the proposed method was enough small to perform navigation in the ascending, transverse, and descending colons.
description: Accepted paper as an oral presentation at SPIE Medical Imaging 2019, San Diego, CA, USA
No Swiss-cheese universe on the brane
Creators: name: Gergely, László Á.
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the possibility of brane-world generalization of the Einstein-Straus Swiss-cheese cosmological model. We find the modifications induced by the brane-world scenario. At a first glance only the motion of the boundary is modified and the fluid in the exterior region is allowed to have pressure. The general relativistic Einstein-Straus model emerges in the low density limit. By imposing that the brane is static, a combination of the junction conditions and modified cosmological evolution leads to the conclusion that the brane is flat. Thus no static Swiss-cheese universe can exist on the brane. The conclusion is not altered by the introduction of a cosmological constant in the FLRW regions. This result mimics a similar general relativistic result: static Einstein-Straus universes do not exist.
description: v2: slightly expanded; references added; version to appear Phys. Rev. D, v3: corrected cf. erratum published in Phys. Rev. D
Abundance of substructure in clusters of galaxies
Creators: name: Natarajan, Priyamvada
name: Springel, Volker
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is widely recognized that cold dark matter models predict abundant dark matter substructure in halos of all sizes. Galaxy-galaxy lensing provides a unique opportunity to directly measure the presence and the mass of such substructures in clusters of galaxies. Here we present the mass function of substructures obtained from lensing in massive HST cluster lenses, and compare it with that obtained from high-resolution cosmological N-body simulations. We find excellent agreement in the slope and amplitude in the mass range 10^{11} - 10^{12.5} solar masses probed by the observations, highlighting a significant success of the CDM theory. At lower mass scales, the simulations predict a large abundance of small substructures below our detection threshold with galaxy-galaxy lensing, with many of them being plausibly associated with faint cluster galaxies. Our results suggest that the CDM substructure abundance on the scale of clusters is in good agreement with present observational data.
description: 9 pages, 2 figures, ApJ Letters in press
Expansions in the local and the central limit theorems for dynamical systems
Creators: name: Fernando, Kasun
name: Pène, Françoise
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A50, 60F05, 37D25

description: We study higher order expansions both in the Berry-Esséen estimate (Edgeworth expansions) and in the local limit theorems for Birkhoff sums of chaotic probability preserving dynamical systems. We establish general results under technical assumptions, discuss the verification of these assumptions and illustrate our results by different examples (subshifts of finite type, Young towers, Sinai billiards, random matrix products), including situations of unbounded observables with integrability order arbitrarily close to the optimal moment condition required in the i.i.d. setting.
description: 66 pages, 2 figures
How Market Efficiency and the Theory of Storage Link Corn and Ethanol Markets
Creators: name: Mallory, Mindy L.
name: Hayes, Dermot J.
name: Irwin, Scott H.
name: Mallory, Mindy L.
name: Hayes, Dermot J.
name: Irwin, Scott H.
Publisher: name: Unknown
Year: 2010
Subjects: subject: Crop Production/Industries
subject: Demand and Price Analysis
subject: Marketing
subject: FOS: Economics and business
subject: Risk and Uncertainty
subject: arbitrage
subject: cointegration
subject: corn
subject: energy
subject: ethanol
subject: futures
subject: price-analysis
subject: storage.

description: In this article we use the theories of market efficiency and supply of storage to develop a conceptual link between the corn and ethanol markets and explore statistical evidence for the link. We propose that a long-run no-profit condition is established in distant futures markets for ethanol, corn, and natural gas and then use the theory of storage to define an inter-temporal equilibrium among these prices. The relationship shows that under certain conditions, future price expectations will influence current spot prices and that a short-term relationship between input and output prices will exist. This short-term relationship will contain fixed costs. We demonstrate validity of the theory using a structural price model and then by means of time-series techniques.
Measuring internal magnetism in gamma-dor stars from dips in the gravity-mode period spacing pattern.
Creators: name: Barrault, Lucas
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Asteroseismology

description: Asteroseismology probes deep dynamical processes including magnetism in the interior of stars. As such, it provides us unique constrains on the transport of angular momentum throughout stellar evolution. Its modelling is one of the major challenges for the theory of stellar evolution with major impact in different fields of Astrophysics. In this framework, the presence of dips in the gravity modes period spacing vs period diagram of gamma Doradus stars is now well established by recent asteroseismic studies from the Kepler mission. One key mechanism has been demonstrated to result in such dips formation with a well-defined period and shape: the interaction of gravito-inertial modes propagating in the radiative envelope of these stars with pure inertial modes propagating in their convective core. The analysis of these mixed modes brings unprecedented insights into the rotation of the convective core of such stars. A deep understanding of the dip formation has been described by Tokuno & Takata (2022), and the Lorentzian shape of the dip has been derived analytically for Kelvin modes in a star rotating as a solid-body. In this work, we aim to extend their formalism to the case of magnetic stars because magnetic fields are one of the main serious candidates to efficiently redistribute angular momentum throughout stellar evolution. For this, considering a toroidal magnetic topology corresponding to a uniform Alfvén frequency in each region, we study the waves behaviour both in the radiative envelope and in the convective core and we demonstrate that the MHD coupling problem shows similarities with the hydrodynamic case. We identify the three main influences of the magnetic field: a shift of the baseline, an additional slope of the period-spacing pattern and a shift of the location of the dip in the inertial frame. We extend the study to non-Kelvin modes previously detected in gamma-Dor stars. Our work thus demonstrates the remarkable potentiality of studying such dips to probe internal stellar magnetism and provides predictions for further detection in asteroseismic data.
Dynamics of Triangulations
Creators: name: Collet, Pierre
name: Eckmann, Jean-Pierre
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study a few problems related to Markov processes of flipping triangulations of the sphere. We show that these processes are ergodic and mixing, but find a natural example which does not satisfy detailed balance. In this example, the expected distribution of the degrees of the nodes seems to follow the power law $d^{-4}$.
Retos a los que se enfrentan los sistemas eléctricos insulares españoles en el contexto de la transición energética y el Cambio Climático (WEBINAR 23/09/2020)
Creators: name: Santos, Pablo
Publisher: name: Zenodo
Year: 2020

description: Presentación en webinar de SOCLIMPACT el 23/09/2020 para la comunidad online Principales temas: Los sistemas eléctricos de Canarias El reto para el futuro Herramientas de flexibilidad para el sistema eléctrico 4. El papel protagonista de la demanda Conclusiones
Nonequilibrium dynamical transition process between excited states of holographic superconductors
Creators: name: Li, Ran
name: Wang, Jin
name: Wang, Yong-Qiang
name: Zhang, Hongbao
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the dynamics of the holographic $s$-wave superconductors described by the Einstein-Maxwell-complex scalar field theory with a negative cosmological constant. If the eigenfunction of the linearized equation of motion of the scalar field in the planar RNAdS black hole background is chosen as the initial data, the bulk system will evolve to the intermediate state that corresponds to the excited state superconductor on the boundary. The process can be regarded as the non-equilibrium condensation process of the excited state of holographic superconductor. When the linear superposition of the eigenfunctions is chosen as the initial data, the system will go through a series of the intermediate states corresponding to different overtone numbers, which can be regarded as the dynamical transition process between the excited states of holographic superconductor. Because the intermediate states are metastable, the bulk system eventually evolves to the stationary state that corresponds the ground state of the holographic superconductor. We also provide a global and physical picture of the evolution dynamics of the black hole and the corresponding superconducting phase transition from the funneled landscape view, quantifying the weights of the states and characterizing the transitions and cascades towards the ground state.
Assessing Identity and Access Management Process Maturity: First Insights from the German Financial Sector
Creators: name: Schrimpf, Andre
name: Drechsler, Andreas
name: Dagianis, Konstantinos
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: We develop an Identity and Access Management (IAM) process maturity model and provide a first assessment of four organizations in Germany’s financial industry. We find that the assessed organizations show merely average IAM maturity levels, and especially lack maturity and compliance in user registration and logging and tracking. Information technology (IT) managers, consultants, and auditors can use the model to (self)-audit, compare, or benchmark IAM process maturity, or identify weaknesses in organizations’ IAM processes.
An Empirical Model of Crop Rotations
Creators: name: MacEwan, Duncan
name: Howitt, Richard E.
name: MacEwan, Duncan
name: Howitt, Richard E.
Publisher: name: Unknown
Year: 2011
Subjects: Crop Production/Industries

description: Crop rotation systems have played a key role in agricultural production for thousands of years, dating back to the biennial grain-fallow rotations employed by the Ancient Greeks. Fundamentally, rotations are rooted in intertemporal spillover effects between crops, the economic consequences of which depend on relative input and output prices. We contribute to the literature by developing a dynamic, field-level model of crop rotations using a geo-referenced panel dataset that covers 12 years and over 14,000 individual fields. We identify empirical rotations using a Sequence Analysis procedure from the bio-informatics literature, and calibrate a dynamic field-level profit function that satisfies the underlying Euler dynamic first-order conditions using Generalized Maximum Entropy. The resulting model is based entirely on empirical data, and exhibits a stable rotational cycle which responds to changes in expected prices and costs. We illustrate the mechanics of the model with a four-crop rotation of alfalfa, cotton, grain, and fallow, and simulate field-level changes resulting from changes in relative prices.
description: Replaced with revised version of paper 03/08/11.
Financing Matters
Creators: name: Malcolm, Bill
name: Malcolm, Bill
Publisher: name: Unknown
Year: 2011
Subjects: Agribusiness
Farm Management
Financial Economics
Risk and Uncertainty

description: Farms systems are open to financial systems. Financing matters. Analysis of questions about management of farms is a multi-dimensional task; focusing on economic efficiency only partly does the job. A financial system channeling funds efficiently from the non-farm sector to the farm sector, doing so in many and varied ways that meet the specific and different requirements of farm businesses is the key to a farm sector that is liquid and, as a consequence, makes it possible for farmers to use resources efficiently and to grow their wealth.
Additional file 1 of Age-standardized mortality, disability-adjusted life-years and healthy life expectancy in different cultural regions of Guangdong, China: a population-based study of 2005–2015
Creators: name: Zheng, Xue-Yan
name: Xu, Xiao-Jun
name: Liu, Yi-Yang
name: Xu, Yan-Jun
name: Si-Xing Pan
name: Zeng, Xin-Ying
name: Yi, Qian
name: Xiao, Ni
name: Lin, Li-Feng
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 1. Supplementary e-Appendix.
On the Genealogy of Populations: Trees, Branches and Offsprings
Creators: name: Serva, Maurizio
Publisher: name: arXiv
Year: 2005
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Other Condensed Matter (cond-mat.other)
subject: Other Quantitative Biology (q-bio.OT)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We consider a neutral haploid population whose generations are not overlapping and whose size is large and constantly of $N$ individuals. Any generation is replaced by a new one and any individual has a single parent. We do not choose the stochastic rule which assigns the number of offsprings to any individual since results do not depend on the details of the dynamics, and, as a consequence, the model is parameter free. The genealogical tree is very complex, and distances between individuals (number of generations from the common ancestor) are distributed according to probability density which remains random in the thermodynamic limit (large population). We give a theoretical and numerical description of this distribution and we also consider the dynamical aspects of the problem describing the time evolution of the maximum and mean distances in a single population.
Gluonic Hot Spot Initial Conditions in Heavy-Ion Collisions
Creators: name: Snyder, R.
name: Byres, M.
name: Lim, S. H.
name: Nagle, J. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The initial conditions in heavy-ion collisions are calculated in many different frameworks. The importance of nucleon position fluctuations within the nucleus and sub-nucleon structure has been established when modeling initial conditions for input to hydrodynamic calculations. However, there remain outstanding puzzles regarding these initial conditions, including the measurement of the near equivalence of the elliptical $v_{2}$ and triangular $v_{3}$ flow coefficients in ultra-central 0-1% Pb+Pb collisions at the LHC. Recently a calculation termed MAGMA incorporating gluonic hot spots via two-point correlators in the Color Glass Condensate framework, and no nucleons, provided a simultaneous match to these flow coefficients measured by the ATLAS experiment, including in ultra-central 0-1% collisions. Our calculations reveal that the MAGMA initial conditions do not describe the experimental data when run through full hydrodynamic SONIC simulations or when the hot spots from one nucleus resolve hot spots from the other nucleus, as predicted in the Color Glass Condensate framework. We also explore alternative initial condition calculations and discuss their implications.
description: 14 pages, 15 figures, submitted for publication
Assessing Practitioner Beliefs about Software Engineering
Creators: name: Shrikanth, N. C.
name: Nichols, William
name: Fahid, Fahmid Morshed
name: Menzies, Tim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Software engineering is a highly dynamic discipline. Hence, as times change, so too might our beliefs about core processes in this field. This paper checks some five beliefs that originated in the past decades that comment on the relationships between (i) developer productivity; (ii) software quality and (iii) years of developer experience. Using data collected from 1,356 developers in the period 1995 to 2006, we found support for only one of the five beliefs titled "Quality entails productivity". We found no clear support for four other beliefs based on programming languages and software developers. However, from the sporadic evidence of the four other beliefs we learned that a narrow scope could delude practitioners in misinterpreting certain effects to hold in their day to day work. Lastly, through an aggregated view of assessing the five beliefs, we find programming languages act as a confounding factor for developer productivity and software quality. Thus the overall message of this work is that it is both important and possible to revisit old beliefs in SE. Researchers and practitioners should routinely retest old beliefs.
description: 32 pages, published https://link.springer.com/article/10.1007/s10664-021-09957-5
Capacidad de adaptación de las redes eléctricas a las situaciones provocadas por el Cambio Climático (WEBINAR 23/09/2020)
Creators: name: Castellano, Adrian
Publisher: name: Zenodo
Year: 2020

description: Presentación en webinar de SOCLIMPACT el 23/09/2020 para la comunidad online Principales temas: Riesgos energéticos por cambio climático. (Cadenas de impacto) Estrategia para la maximización de EERR Metodología general para realizar estudios eléctricos de potencia (Estudio de estabilidad) Modelado de redes eléctricas Análisis para el estudio de eventos derivados del cambio climático