cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Toppling pencils -- Macroscopic Randomness from Microscopic Fluctuations
Creators: name: Dittrich, Thomas
name: Martínez, Santiago Peña
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We construct a microscopic model to study discrete randomness in bistable systems coupled to an environment comprising many degrees of freedom. A quartic double well is bilinearly coupled to a finite number $N$ of harmonic oscillators. Solving the time-reversal invariant Hamiltonian equations of motion numerically, we show that for $N = 1$, the system exhibits a transition with increasing coupling strength from integrable to chaotic motion, following the KAM scenario. Raising $N$ to values of the order of 10 and higher, the dynamics crosses over to a quasi-relaxation, approaching either one of the stable equilibria at the two minima of the potential. We corroborate the irreversibility of this relaxation on other characteristic timescales of the system by recording the time dependences of autocorrelation, partial entropy, and the frequency of jumps between the wells as functions of $N$ and other parameters. Preparing the central system in the unstable equilibrium at the top of the barrier and the bath in a random initial state drawn from a Gaussian distribution, symmetric under spatial reflection, we demonstrate that the decision whether to relax into the left or the right well is determined reproducibly by residual asymmetries in the initial positions and momenta of the bath oscillators. This result reconciles the randomness and spontaneous symmetry breaking of the asymptotic state with the conservation of entropy under canonical transformations and the manifest symmetry of potential and initial condition of the bistable system.
description: 22 pages, 10 figures
Evaluacion social multicriterio del territorio agricola: el caso del olivar de baja produccion
Creators: name: Arriaza Balmón, Manuel
name: Nekhay, Olexandr
name: Arriaza Balmón, Manuel
name: Nekhay, Olexandr
Publisher: name: Unknown
Year: 2010
Subjects: subject: Crop Production/Industries
subject: Land Economics/Use
subject: olivar
subject: AHP
subject: ANP
subject: SIG
subject: optimizacion
subject: territorio
subject: Olive plantations
subject: optimization
subject: land use

description: El presente trabajo analiza el tipo de gestion del oliver, o su posible reconversion al bosque mediterraneo, que maximiza la probision de bienes y servicios comerciales y no comerciales de este sistema agrario. Metodologicamente se combinan tecnicas de analisis multicriterio de agregacion de preferencias individuales, el metodo analitico jerarquico (AHP), y el analisis territorial mediante los Sistemas de Informacion Geografica (SIG). La informacion primaria procede de una encuesta a la poblacion para determinar sus preferencias sobre las funciones que deberian cumplir este sistemas agrario y de carias entrevistas personales a grupos de expertos, uno para cada funcion, para evaluar como cada sistema de gestion contribuye a la consecucion de estas funciones. Ambas fuentes de informacion se integran posteriormente un SIG que georreferencia el tipo de gestion que maximiza el bienestar de la sociedad. Los resultados sugieren que la funcion mas valorada del olivar de montana es la fijacion de la poblacion rural (un 24 por ciento), seguida por la produccion de aceite de oliva (un 18 por ciento). El modelo general de optimizacion plantea reconvertir aproximadamente dos tercios del olicar gestionado de forma convencional por otros tipos de gestion (integral o ecologica) o su reconversion al bosque mediterraneo. In this paper alternative management systems of olive plantations and its restoration to Mediterranean forest are analysed in order to optimise the provision of market and public goods of this agricultural system. Methodologically, the Analytic Hierarchy Process, assess citizens' preferences for the functions that olive plantations (Olea europea L.) in mountain areas should provide to Society and experts' opinions about the adequacy of each olive production system for the achievement of such functions, is combines with a Geographical Information System (GIS) to determine changes in agricultural land use to optimise social welfare. According to the population's responses, keeping the rural population in the villages (24%), the production of olive oil (18%), the prevention of wildfires (17%) and the reduction of soil erosion (16%) are the most valued functions. The general GIS model indicates that two thirds of the conventional production system should shift toward integrated and organic production systems and restoration of the Mediterranean forest to maximize social welfare.
Weighted uniform consistency of kernel density estimators
Creators: name: Gine, Evarist
name: Koltchinskii, Vladimir
name: Zinn, Joel
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 62G07 (Primary) 60F15, 62G20. (Secondary)

description: Let f_n denote a kernel density estimator of a continuous density f in d dimensions, bounded and positive. Let Ψ(t) be a positive continuous function such that \|Ψf^β\|_{\infty}
description: Published by the Institute of Mathematical Statistics (http://www.imstat.org) in the Annals of Probability (http://www.imstat.org/aop/) at http://dx.doi.org/10.1214/009117904000000063
A highly scalable particle tracking algorithm using partitioned global address space (PGAS) programming for extreme-scale turbulence simulations
Creators: name: Buaria, Dhawal
name: Yeung, P. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A new parallel algorithm utilizing partitioned global address space (PGAS) programming model to achieve high scalability is reported for particle tracking in direct numerical simulations of turbulent flow. The work is motivated by the desire to obtain Lagrangian information necessary for the study of turbulent dispersion at the largest problem sizes feasible on current and next-generation multi-petaflop supercomputers. A large population of fluid particles is distributed among parallel processes dynamically, based on instantaneous particle positions such that all of the interpolation information needed for each particle is available either locally on its host process or neighboring processes holding adjacent sub-domains of the velocity field. With cubic splines as the preferred interpolation method, the new algorithm is designed to minimize the need for communication, by transferring between adjacent processes only those spline coefficients determined to be necessary for specific particles. This transfer is implemented very efficiently as a one-sided communication, using Co-Array Fortran (CAF) features which facilitate small data movements between different local partitions of a large global array. Detailed benchmarks are obtained on the Cray petascale supercomputer Blue Waters at the University of Illinois, Urbana-Champaign. For operations on the particles in a $8192^3$ simulation ($0.55$ trillion grid points) on $262,144$ Cray XE6 cores, the new algorithm is found to be orders of magnitude faster relative to a prior algorithm in which each particle is tracked by the same parallel process at all times. Improving support of PGAS models on major compilers suggests that this algorithm will be of wider applicability on most upcoming supercomputers.
description: 19 pages, 6 figures
A frozen glass phase in the multi-index matching problem
Creators: name: Martin, O. C.
name: Mezard, M.
name: Rivoire, O.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The multi-index matching is an NP-hard combinatorial optimization problem; for two indices it reduces to the well understood bipartite matching problem that belongs to the polynomial complexity class. We use the cavity method to solve the thermodynamics of the multi-index system with random costs. The phase diagram is much richer than for the case of the bipartite matching problem: it shows a finite temperature phase transition to a completely frozen glass phase, similar to what happens in the random energy model. We derive the critical temperature, the ground state energy density, and properties of the energy landscape, and compare the results to numerical studies based on exact analysis of small systems.
Intelligibility development 30–47 months (Hustad et al., 2020)
Creators: name: Hustad, Katherine C.
name: Mahr, Tristan
name: Natzke, Phoebe E. M.
name: Rathouz, Paul J.
Publisher: name: ASHA journals
Year: 2020
Subjects: subject: 170204 Linguistic Processes (incl. Speech Production and Comprehension)
subject: FOS: Psychology

description: Purpose: We sought to establish normative growth curves for intelligibility development for the speech of typically developing children as revealed by objectively based orthographic transcription of elicited single-word and multiword utterances by naïve listeners. We also examined sex differences, and we compared differences between single-word and multiword intelligibility growth.Method: One hundred sixty-four typically developing children (92 girls, 72 boys) contributed speech samples for this study. Children were between the ages of 30 and 47 months, and analyses examined 1-month age increments between these ages. Two different naïve listeners heard each child and made orthographic transcriptions of child-produced words and sentences (n = 328 listeners). Average intelligibility scores for single-word productions and multiword productions were modeled using linear regression, which estimated normal-model quantile age trajectories for single- and multiword utterances.Results: We present growth curves showing steady linear change over time in 1-month increments from 30 to 47 months for 5th, 10th, 25th, 50th, 75th, 90th, and 95th percentiles. Results showed that boys did not differ from girls and that, prior to 35 months of age, single words were more intelligible than multiword productions. Starting at 41 months of age, the reverse was true. Multiword intelligibility grew at a faster rate than single-word intelligibility.Conclusions: Children make steady progress in intelligibility development through 47 months, and only a small number of children approach 100% intelligibility by this age. Intelligibility continues to develop past the fourth year of life. There is considerable variability among children with regard to intelligibility development.
Supplemental Material S1. Technical details on integrated weighted intelligibility response for multiword utterances.
Hustad, K. C., Mahr, T., Matzke, P. E. M., & Rathaus, P. J. (2020). Development of speech intelligibility between 30 and 47 months in typically developing children: A cross-sectional study of growth. Journal of Speech, Language, and Hearing Research. Advance online publication. https://doi.org/10.1044/2020_JSLHR-20-00008
Valoracion de preferencias sociales para la mejora del entorno rural en el noroeste de la Region de Murcia
Creators: name: Paz, Jose Miguel
name: Pleite, Federico
name: Llorente, Angel
name: Paz, Jose Miguel
name: Pleite, Federico
name: Llorente, Angel
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Community/Rural/Urban Development
subject: Environmental Economics and Policy
subject: desarrollo rural
subject: PAC
subject: multifuncionalidad
subject: experimentos de eleccion
subject: Region de Murcia
subject: Rural development
subject: CAP
subject: multifunctionality
subject: choice experiments
subject: Region of Murcia

description: Mas alla de la produccion de alimentos y materias primas, la agricultura contribuye en muchas zonas rurales a la conservacion de la biodiversidad, del paisaje y del patrimonio cultural, siendo objectivo de creciente atencion por parte de las politicas agricolas y de desarrollo rural de la UE. Asi, el actual Programa de Desarrollo Rural 2007-2013 preve, en su Eje 2 de Mejora del medio ambiente y el entorno rural, la aplicacion de medidas de apoyo al sector mediante ayudas compensatorias a zonas de montana y en despoblamiento, a la forestacion de superficie agricola y a las medidas agroambientales. En este trabajo, con una encuesta realizada a 356 ciudadanos de la Region de Murcia, se valora a traves de los resultados de un Experimento de Eleccion la utilidad que a los ciudadanos les proporcionan las politicas antes mencionadas en la Comarca del Noroeste de esta Comunidad Autonoma, realizando una valoracion monetaria de las mismas en terminos de precios implicitos. La comparacion de los resultados con el presupuesto precisto por las Administraciones Publicas para gasto en este Eje pone de manidiesto tanto su insuficiente financiacion como una importante divergencia en su reparto por medidas. Beyond food and raw materials production, agriculture contributes to the biodiversity, landscape and cultural heritage conservation, being the focus of considerable attention on the part the common agricultural and rural development policy of the European Union. The Axis 2 about improving the environment and countryside included in the Rural Development Programme 2007-2013 provides measures as compensatory premiums to mountain and depopulation areas, afforestation of agricultural land, and agri-environmental measures. In this work, by means of a survey to 356 inhabitants of the Region of Murcia, the utility of the implementation of the above measures in the Northwest District of the Region is values by a Choice Experiment. In addition, these measures are estimated in terms of implicit prices. The results are compared with the budget provided by the Public Administration, which highlights its insufficient financing as well as an important divergence as far as its proportional split is concerned.
Integrated use of terrestrial laser scanning and advanced numerical methods for a total slope analysis of Afternoon Creek, Washington
Creators: name: Strouth, Alexander Brian
Publisher: name: University of British Columbia
Year: 2010

description: On November 9, 2003 a rock slide, involving approximately 750,000 m³ of jointed, orthogenesis occurred at the Afternoon Creek ridge adjacent to the North Cascades Highway in northwest Washington. Most of the failed blocks slid into the shallowly-sloping Afternoon Creek, and did not reach the highway. However, a small fraction of the failed volume traveled down the west side of the ridge, and entered the steep, bedrock-exposed Falls Creek. This debris fell more than 600 meters and impacted the highway, destroying a section of the roadway. There is potential for future rock slope failures to occur at this site, thereby presenting a hazard to the highway below. The purpose of this research was to investigate the November, 2003 rock slope failure and post-failure motion, and use the results of the investigation to assess the location, volume, and effects of future slope failures at Afternoon Creek. A Total Slope Analysis methodology was followed, which linked the failure initiation analysis with runout analysis. The structural and topographic controls to failure were analyzed with limit equilibrium, and the 2-D and 3-D distinct element codes, UDEC and 3DEC. Runout was analyzed with the 3- D dynamic analysis code, DAN3D. A data collection methodology designed specifically for numerical modeling was implemented. A laser scanner and field survey were used to collect discontinuity characterization data at the inaccessible, hazardous site. The analysis suggested that the past event involved a single-stage, extremely-rapid translational failure on a highly-persistent, moderately-dipping joint set. Material that entered Falls Creek was most likely caused by secondary rock fall immediately following the slide. A future rock slope failure up to 300,000 m³ emanating from the existing failure scarp is possible; however runout debris from an event of this volume is not expected to reach the highway at Afternoon Creek. In contrast, retrogression of the failure scarp crest by sliding or toppling of individual columns may cause rock fall to enter the steeper Falls Creek travel path where it will most likely impact the highway embayment.
The radial velocity of the companion star in the low-mass X-ray binary 2S 0921-630: limits on the mass of the compact object
Creators: name: Jonker, P. G.
name: Steeghs, D.
name: Nelemans, G.
name: van der Klis, M.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this Paper we report on optical spectroscopic observations of the low-mass X-ray binary 2S 0921-630 obtained with the Very Large Telescope. We found sinusoidal radial velocity variations of the companion star with a semi-amplitude of 99.1+-3.1 km s^-1 modulated on a period of 9.006+-0.007 days, consistent with the orbital period found before for this source, and a systemic velocity of 44.4+-2.4 km s^-1. Due to X-ray irradiation the centre-of-light measured by the absorption lines from the companion star is likely shifted with respect to the centre-of-mass. We try to correct for this using the so-called K-correction. Conservatively applying the maximum correction possible and using the previously measured rotational velocity of the companion star, we find a lower limit to the mass of the compact object in 2S 0921-630 of M_X sin^3 i > 1.90+-0.25 Msun (1 sigma errors). The inclination in this system is well constrained since partial eclipses have been observed in X-rays and optical bands. For inclinations between 60< i<90 degrees we find 1.90+-0.25
description: 6 pages, 3 figures, accepted for publication in MNRAS
Etude sur les perceptions des agriculteurs quebecois sur les OGM apres 10 ans d'utilisation
Creators: name: West, Gale E.
name: Larue, Bruno
name: Jeddy, Mohamed
name: Verreault-Lefebvre, Olivier
name: West, Gale E.
name: Larue, Bruno
name: Jeddy, Mohamed
name: Verreault-Lefebvre, Olivier
Publisher: name: Unknown
Year: 2014
Subjects: subject: Food Consumption/Nutrition/Food Safety
subject: biotechnology
subject: production
subject: survey
subject: farmers
subject: Canada
subject: GMO

description: Even after many years of use, genetically modified (GM) grain technologies remain controversial. In 2003-2004, the Direction for Development and Innovation within the Quebec Ministry of Agriculture and Fisheries, had funded an initial survey of grain farmer’s opinions and practices regarding the production of GM crops (n=412), which was repeated in 2012-2013 (n=516). This report presents results comparing responses over time, while also covering several new controversial issues in GM production. The topics covered in this report are numerous: 1. the safety of GM foods; 2. the control of agricultural inputs by biotech firms; 3. the capacity of organic crops to coexist with GM crops; 4. the environmental impact of GM crops; 5. why farmers choose GM seeds; 6. crop rotation and fertilization practices; 7. management of pesticide applications and the existence of pests resistant to GM inputs; 8. use of refuges for Bt corn; and 9. GM crop segregation, sales and profits. Overall, Quebec grain farmers’ attitudes and opinions became increasingly favorable toward GM crops over time, but several of their pest management practices remain somewhat tenuous.
Uncoupling electrokinetic flow solutions
Creators: name: Kuhlman, Kristopher L.
name: Malama, Bwalya
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The continuum-scale electrokinetic porous-media flow and excess charge redistribution equations are uncoupled using eigenvalue decomposition. The uncoupling results in a pair of independent diffusion equations for "intermediate" potentials subject to modified material properties and boundary conditions. The fluid pressure and electrostatic potential are then found by recombining the solutions to the two intermediate uncoupled problems in a matrix-vector multiply. Expressions for the material properties or source terms in the intermediate uncoupled problem may require extended precision or careful re-writing to avoid numerical cancellation, but the solutions themselves can be computed in typical double precision. The approach works with analytical or gridded numerical solutions and is illustrated through two examples. The solution for flow to a pumping well is manipulated to predict streaming potential and electroosmosis, and a periodic one-dimensional analytical solution is derived and used to predict electroosmosis and streaming potential in a laboratory flow cell subjected to low frequency alternating current and pressure excitation. The examples illustrate the utility of the eigenvalue decoupling approach, repurposing existing analytical solutions and leveraging simpler-to-derive solutions or numerical models for coupled physics.
description: Accepted for publication in Mathematical Geosciences; 3 tables, 9 figures
title: Für den Frieden der ganzen Welt
title: Rezension zu Florian Schwetz: Der Souveräne Malteser-Ritter-Orden
titleType: Subtitle
Creators: name: Pichler, Florian
Year: 2023
Subjects: Religionsrecht
Religious law
ÖFOS 2012 -- SOZIALWISSENSCHAFTEN (5) -- Rechtswissenschaften (505) -- Rechtswissenschaften (5050) -- Religionsrecht (505018)
ÖFOS 2012 -- SOCIAL SCIENCES (5) -- Law (505) -- Law (5050) -- Religious law (505018)
Kirchenrecht
Malteser
Katholische Kirche
Verfassungsreform
Ordensreform

description: Rezension zu: Florian Schwetz, Der Souveräne Malteser-Ritter-
Orden. Eine kirchen- und staatsrechtliche Betrachtung nach
der Reform. Wien: Sramek 2. erweiterte und aktualisierte Aufl.
2023. ISBN 978-3-7097-0351-9

DOI: 10.25365/phaidra.460
Factores explicativos de la contratacion de seguros por parte de los productores ecologicos de fruta y cereal en Espana
Creators: name: Medina, Felipe
name: Garrido, Alberto
name: Iglesias, Ana
name: Medina, Felipe
name: Garrido, Alberto
name: Iglesias, Ana
Publisher: name: Unknown
Year: 2010
Subjects: subject: Agribusiness
subject: Agricultural Finance
subject: Farm Management
subject: riesgo
subject: seguros agrarios
subject: agricultura ecologica
subject: percepcion de riesgos
subject: risk
subject: agricultural insurance
subject: organic farming and risk perception

description: Se analizan por medio de modelos econometricos, empleando datos de encuesta, los factores que explican la contratacion de seguros agrarios por parte de productores ecologicos. Los modelos logit y poisson revelan que aspectos y condicionantes como la percepcion que los agricultores dedicados a la produccion ecologica tienen de cada riesgo, el grado de diversificacion existente en la explotacion o la propia dimension economica de la misma, pueden explicar la utilidad que hoy en dia tiene para dichos productores una herramienta como el seguro agrario, utilizado por un gran numero de ellos con el objetivo de garantizar la proteccion de sus cosechas frente a posibles fenomenos climatologicos adversos. Se demuestra que las variables que condicionan la contratacion de yuna poliza de seguro agrario difieren mucho entre los cultuvos de cereal y fruta ecologica. En el caso de los productores de fruta ecologica, de las variables contempladas en este estudio, son los riesgos de pedrisco y plagas asi como el grado de diversificacion de la propia explotacion los que condicionan la decision de contratar. Sin embargo, en el caso de los productores de cereal ecologico es el tamano economico de la la explotacion el que condiciona fundamentalmente la suscripcion de una poliza de seguro. This paper analyzes the main factors that determinate the decision of contracting an agricultural insurance policy by organic farmers using data from a questionnaire and econometric models. Logit and Poisson models reveal the aspects and conditionings of organic farmer's risk perception. The diversification level of their farms and also the economic dimension of their farm can explain how useful the agricultural insurance is nowadays. This tool is used by a great number of farmers in Spain with the aim of protecting their crop against adverse climatic disasters. It is demonstrated in this paper that the variables that determine an agricultural insurance policy subscription is very different between fruit and cereal organic producers. In case of organic fruit producers, hail and plague aversion and diversification level are the variables that determinate the decision of subscribe an agricultural insurance policy. However, for the cereal organic farmers, the variable that fundamentally determine the subscription is the economic size of the main farm.
title: Die effektive Steigerung der Reinigung durch Digitalisierung
Creators: name: Fischer, Alexander
Publisher: name: TU Wien
Year: 2018
Subjects: subject: Facility Services
subject: Reinigung
subject: Digitalisierung
subject: Innovation
subject: Software
subject: Facility Services
subject: Reinigung
subject: Digitalisierung
subject: Innovation
subject: Software

description: Die vorliegende Masterarbeit soll die Digitalisierung und dessen Auswirkung im Bereich der Facility Services, genauer gesagt der Reinigung, beleuchten. In einem theoretischen Teil befasst sich diese Arbeit zunächst mit dem Begriff Facility Management sowie der Gebäudereinigung im Allgemeinen und welche Innovationen in dieser Branche erkennbar sind. Im konkreten Fall wird hier die „Digitalisierung“ thematisiert sowie die Anwendung der Digitalisierung auf die Gebäudereinigung näher beleuchtet. Im Anschluss wird aufgezeigt inwiefern die Effektivität der Reinigung durch den Einsatz digitaler Hilfsmittel gesteigert werden kann. Ein konkretes Praxisbeispiel soll die in dieser Arbeit aufgestellten Thesen unterstreichen und aufzeigen welche Vorteile die Digitalisierung im Bereich der Facility Services bewirken kann. Zugleich wird analysiert mit welchen Herausforderungen man durch den Einsatz digitaler Hilfsmittel konfrontiert ist.
description: Die vorliegende Masterarbeit soll die Digitalisierung und dessen Auswirkung im Bereich der Facility Services, genauer gesagt der Reinigung, beleuchten. In einem theoretischen Teil befasst sich diese Arbeit zunächst mit dem Begriff Facility Management sowie der Gebäudereinigung im Allgemeinen und welche Innovationen in dieser Branche erkennbar sind. Im konkreten Fall wird hier die „Digitalisierung“ thematisiert sowie die Anwendung der Digitalisierung auf die Gebäudereinigung näher beleuchtet. Im Anschluss wird aufgezeigt inwiefern die Effektivität der Reinigung durch den Einsatz digitaler Hilfsmittel gesteigert werden kann. Ein konkretes Praxisbeispiel soll die in dieser Arbeit aufgestellten Thesen unterstreichen und aufzeigen welche Vorteile die Digitalisierung im Bereich der Facility Services bewirken kann. Zugleich wird analysiert mit welchen Herausforderungen man durch den Einsatz digitaler Hilfsmittel konfrontiert ist.
ESM: The formation of methanol from glycerol bio-waste over doped ceria based catalysts.
Creators: name: Devlia, Jay
name: Smith, Louise
name: Douthwaite, Mark
name: Taylor, Stuart H.
name: Willock, David J.
name: Hutchings, Graham J.
name: Dummer, Nicholas F.
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: 91305 Energy Generation, Conversion and Storage Engineering
subject: FOS: Mechanical engineering
subject: 30203 Inorganic Green Chemistry
subject: FOS: Chemical sciences
subject: 30399 Macromolecular and Materials Chemistry not elsewhere classified
subject: 30504 Organic Green Chemistry
subject: 30699 Physical Chemistry not elsewhere classified

description: Electronic supplementary material detailing the list of products formed over the ceria-based catalysts and the hydrogen uptake values normalised to surface area of the cerium-praseodymium oxide catalysts.
Unitary unfoldings of Bose-Hubbard exceptional point with and without particle number conservation
Creators: name: Znojil, Miloslav
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-Hermitian but ${\cal PT}-$symmetric quantum system of an $N-$plet of bosons described by the three-parametric Bose-Hubbard Hamiltonian $H(γ,v,c)$ is picked up, in its special exceptional-point limit $c \to 0$ and $γ\to v$, as an unperturbed part of the family of generalized Bose-Hubbard-like Hamiltonians $\mathfrak{H}(λ)=H(v,v,0)+λ\,{\cal V}$ for which the unitarity of the perturbed system is required. This leads to the construction of two different families of Hamiltonians $\mathfrak{H}(λ)$. In the first one the number $N$ of bosons is assumed conserved while in the second family such an assumption is relaxed. In both cases the anisotropy of the related physical Hilbert space is shown reflected by a highly counterintuitive but operationally realizable structure of admissible perturbations $λ\,{\cal V}$.
description: 27 pp
Quantum polarization properties of two-mode energy eigenstates
Creators: name: Sehat, Anita
name: Söderholm, Jonas
name: Björk, Gunnar
name: Espinoza, Pedro
name: Klimov, Andrei B.
name: Sánchez-Soto, Luis L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that any pure, two-mode, $N$-photon state with $N$ odd or equal to two can be transformed into an orthogonal state using only linear optics. According to a recently suggested definition of polarization degree, this implies that all such states are fully polarized. This is also found to be true for any pure, two-mode, energy eigenstate belonging to a two-dimensional SU(2) orbit. Complete two- and three-photon bases whose basis states are related by only phase shifts or geometrical rotations are also derived.
description: 6 pages, no figure, references and an extended proof of unit polarization for all odd N added
Supporting Information from Sustainable catalytic rearrangement of terpene-derived epoxides: towards bio-based biscarbonyl monomers
Creators: name: P. S. Löser
name: P. Rauthe
name: M. A. R. Meier
name: A. Llevot
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences
subject: 30203 Inorganic Green Chemistry
subject: 30306 Synthesis of Materials
subject: 30503 Organic Chemical Synthesis
subject: 30504 Organic Green Chemistry

description: Sovents and Reagents / Synthesis Procedures
Crustal contamination, sulphide mineralization, and compaction during formation of the marginal zone of the Muskox intrusion, Nunavut, and implications for the evolution of the 1.27 Ga Mackenzie magmatic event
Creators: name: Mackie, Robin
Publisher: name: University of British Columbia
Year: 2010

description: The age, petrology, geochemistry, and Hf-Nd-S isotopic compositions of basal marginal rocks at two locations (West Pyrrhotite Lake and Far West Margin) along the western margin of the large Muskox layered mafic-ultramafic intrusion, Nunavut, are used (1) to constrain the petrogenesis of the marginal zone and associated sulphide mineralization, and (2) to evaluate the genetic relationship of the Muskox intrusion with the Mackenzie dikes and Coppermine River flood basalts during the 1.27 Ga Mackenzie magmatic event. The marginal zone (1269 ± 2 Ma; U-Pb baddeleyite) consists of a lower 10 m-thick gabbronorite and upper 100-150 mthick peridotite subzone. A shift in incompatible trace element ratios and isotopic compositions at the transition from peridotite (low Th/Yb; high Nb/La; E[sub Hf(t)] = -3 to +2; E[sub Nd(t)]= -4 to 0; δ³⁴S = +6) to gabbronorite (E[sub Hf(t)] = -5 to -15; E[sub Nd(t)] = -1 to -13; δ³⁴S = +7 to +10) and the corresponding early crystallization of orthopyroxene and appearance of granophyre within the gabbronorite indicates that the effects of crustal contamination by the adjacent country rocks (high Th/Yb; low Nb/La; E[sub Hf(t)] =- -24 to -29; E[sub Nd(t)] = -14 to -16; δ³⁴S = +7 to +11) is restricted to a thin (10 m) boundary zone along the contact. Silica and sulphur addition promoted local sulphide saturation within the contaminated magmas along the outer wall of the magma chamber. The low metal content of sulphides throughout the intrusion indicates that in general early solidification of this zone inhibited segregated sulphide liquid from interacting with subsequent pulses of magma (low R-factor). The overlying peridotites contain increasing proportions of postcumulus phases relative to cumulus olivine towards the base of the marginal zone, a feature that is related to the competing effects of compaction and rapid heat loss through the base of the intrusion. The marginal zone peridotites and overlying layered series rocks of Muskox intrusion and the lowermost Coppermine River basalts have the same range of Nd isotopic compositions, suggesting that they both were derived from a common relatively enriched mantle source and that this portion of the flood basalts were fed by magma that temporarily resided and fractionated within the Muskox magma chamber during their final ascent through the crust.
Local Fault-tolerant Quantum Computation
Creators: name: Svore, Krysta M.
name: Terhal, Barbara M.
name: DiVincenzo, David P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze and study the effects of locality on the fault-tolerance threshold for quantum computation. We analytically estimate how the threshold will depend on a scale parameter r which estimates the scale-up in the size of the circuit due to encoding. We carry out a detailed semi-numerical threshold analysis for concatenated coding using the 7-qubit CSS code in the local and `nonlocal' setting. First, we find that the threshold in the local model for the [[7,1,3]] code has a 1/r dependence, which is in correspondence with our analytical estimate. Second, the threshold, beyond the 1/r dependence, does not depend too strongly on the noise levels for transporting qubits. Beyond these results, we find that it is important to look at more than one level of concatenation in order to estimate the threshold and that it may be beneficial in certain places, like in the transportation of qubits, to do error correction only infrequently.
description: REVTeX, 44 pages, 19 figures, to appear in Physical Review A
Remarkable properties of the $\text{sinc}_{p, q}$ functions and related integrals
Creators: name: Melkonian, Houry
name: Takeuchi, Shingo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: Primary 33B10, 33F99, Secondary 42A99

description: Different types of sinc integrals are investigated when the standard sine function is replaced by the generalised $\sin_{p,q}$ in two parameters. A striking generalisation of the improper Dirichlet integral is achieved. A second surprising but interesting generalisation of the identity between the Dirichlet integral and that of the integrand $\text{sinc}^2$ is discovered. Moreover, an asymptotically sharpened form of Ball's integral inequality is obtained in terms of two parameters.
Hamiltonian theory of the strongly-coupled limit of the Kondo problem in the overscreened case
Creators: name: Giuliano, Domenico
name: Tagliacozzo, Arturo
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: By properly generalizing Nozie`res' Fermi liquid theory, we construct an Hamiltonian approach to the scattering of conduction electrons off a spin-1/2 impurity in the ovescreneed Kondo regime, as T -> 0. We derive the S-matrix at the interacting fixed point, and the corresponding phase shifts, together with leading energy corrections to the unitary limit. We apply our results to obtain the low-temperature dependence of the 2-channel Kondo conductance, and we relate it to possible transport experiments in a Quantum Dot
description: 22 pages, 1 figure
Journeys with 'The Waste Land' - Jack Rooke: Mental Health and T.S. Eliot's 'The Waste Land'
Creators: name: Tooby, Michael
Publisher: name: BathSPAdata
Year: 2021
Subjects: subject: 200503 British and Irish Literature
subject: FOS: Languages and literature
subject: 200204 Cultural Theory
subject: FOS: Other humanities
subject: Art
subject: 130201 Creative Arts, Media and Communication Curriculum and Pedagogy
subject: FOS: Educational sciences
subject: 190599 Visual Arts and Crafts not elsewhere classified
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 190103 Art Theory

description: The material referenced in this item is located externally at the YouTube platform, and can be viewed in full by accessing via the provided link.

Journeys with 'The Waste Land' was a major exhibition exploring the significance of T.S. Eliot's poem 'The Waste Land' through the visual arts. This was a three-year project to develop pioneering and innovative approaches towards curating and curatorial research.

This item contains a video of Jack Rooke's response to the project. This is part of a series of 5 films made by Turner Contemporary with funding from BBC's The Space in response to 'Journeys with 'The Waste Land', a major exhibition exploring T.S. Eliot's 'The Waste Land' through visual arts.
Jack Rooke is a comedy writer, presenter and mental health campaigner from Watford.
Regional boundary gradient strategic sensors in Neumann conditions
Creators: name: Al-Saphory, Raheam
name: Al-Bayati, Mrooj
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The main idea of this paper is to explore and present the original results related to the notion of regional boundary gradient strategic sensors in distributed parameter system for Neumann problem. Thus, this systems is described by parabolic state space partial differential equations where the dynamic is governed by strongly continuous semi-group in Hilbert space. In addition, we give the sufficient conditions which are guaranteed the characterizations for such sensors in order that regional boundary approximately gradient observability can be achieved and proved. The obtained results are applied to two-dimensional circular in a part of considered system domain with various cases of sensors locations are tackled and studied.
description: 13 page, 6 figures, regular paper. arXiv admin note: text overlap with arXiv:2005.02256
Probing Quantum Decoherence with High-Energy Neutrinos
Creators: name: Hooper, Dan
name: Morgan, Dean
name: Winstanley, Elizabeth
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the prospects for observing the effects of quantum decoherence in high-energy (TeV-PeV) neutrinos from astrophysical sources. In particular, we study Galactic sources of electron anti-neutrinos produced in the decay of ultra-high energy neutrons. We find that next generation neutrino telescopes should be capable of placing limits on quantum decoherence effects over multi-kiloparsec baselines, surpassing current bounds by a factor of $10^{12}$ to $10^{33}$, depending on the model considered.
description: 4 pages
A Qualitative and Quantitative Analysis of the Bias Caused by Adaptivity in Multi-Armed Bandits
Creators: name: Jaehyeok Shin
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: subject: Statistics
subject: FOS: Mathematics

description: In classical and non-adaptive data analysis, the target of interest is typically fixed in advance, and a fixed number of samples are collected in an i.i.d. manner to conduct statistical inference on the target. In many cases, however, data are collected and analyzed adaptively. For example, in the multi-armed bandit setting, data are collected sequentially and adaptively such that at every round, a sample is drawn from an arm which is selected based on the sampling history so far. The sampling procedure can be stopped based on a data-driven stopping rule. Furthermore, the adaptively collected data are often used to identify an interesting target and the same data are used to conduct statistical inference on this target. Even though this kindof adaptive scheme is prevalent in data analysis, theoretical justifications for commonly used inference procedures are not yet sufficiently developed. This disparity challenges the validity of decisions we make based on adaptive data analyses. In order to close the gap, the thesis first focuses on the mean estimation problem for multi-armed bandits. We derive a qualitative characterization of the adaptive mean estimation procedure which determines the sign of biasof the sample mean for each arm. We provide sharp bounds on both the bias and the risk which show that even though the sample mean is biased under adaptive schemes, the size of the risk is as small as one can achieve under the non-adaptive i.i.d. setting.
Personal Food Model
Creators: name: Rostami, Ali
name: Pandey, Vaibhav
name: Nag, Nitish
name: Wang, Vesper
name: Jain, Ramesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multimedia (cs.MM)
subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Food is central to life. Food provides us with energy and foundational building blocks for our body and is also a major source of joy and new experiences. A significant part of the overall economy is related to food. Food science, distribution, processing, and consumption have been addressed by different communities using silos of computational approaches. In this paper, we adopt a person-centric multimedia and multimodal perspective on food computing and show how multimedia and food computing are synergistic and complementary. Enjoying food is a truly multimedia experience involving sight, taste, smell, and even sound, that can be captured using a multimedia food logger. The biological response to food can be captured using multimodal data streams using available wearable devices. Central to this approach is the Personal Food Model. Personal Food Model is the digitized representation of the food-related characteristics of an individual. It is designed to be used in food recommendation systems to provide eating-related recommendations that improve the user's quality of life. To model the food-related characteristics of each person, it is essential to capture their food-related enjoyment using a Preferential Personal Food Model and their biological response to food using their Biological Personal Food Model. Inspired by the power of 3-dimensional color models for visual processing, we introduce a 6-dimensional taste-space for capturing culinary characteristics as well as personal preferences. We use event mining approaches to relate food with other life and biological events to build a predictive model that could also be used effectively in emerging food recommendation systems.
Neutron stars in a Skyrme model with hyperons
Creators: name: Mornas, L.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Available Skyrme parametrizations with hyperons are examined from the point of view of their suitability for applications to neutron stars. It is shown that the hyperons can attenuate or even remove the problem of ferromagnetic instability common to (nearly) all Skyrme parametrizations of the nucleon-nucleon interaction. At high density the results are very sensitive to the choice of the Lambda-Lambda interaction. The selected parameter sets are then used to obtain the resulting properties of both cold neutron stars and hot protoneutron stars. The general features known from other models are recovered.
description: 27 pages, 9 figures
Vertex-reinforced random walk on Z eventually gets stuck on five points
Creators: name: Tarres, Pierre
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60G17 (Primary) 34F05, 60J20. (Secondary)

description: Vertex-reinforced random walk (VRRW), defined by Pemantle in 1988, is a random process that takes values in the vertex set of a graph G, which is more likely to visit vertices it has visited before. Pemantle and Volkov considered the case when the underlying graph is the one-dimensional integer lattice Z. They proved that the range is almost surely finite and that with positive probability the range contains exactly five points. They conjectured that this second event holds with probability 1. The proof of this conjecture is the main purpose of this paper.
description: Published by the Institute of Mathematical Statistics (http://www.imstat.org) in the Annals of Probability (http://www.imstat.org/aop/) at http://dx.doi.org/10.1214/009117907000000694
A connection between bacterial chemotactic network and optimal filtering
Creators: name: Nakamura, Kento
name: Kobayashi, Tetsuya J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: The chemotactic network of Escherichia coli has been studied extensively both biophysically and information-theoretically. Nevertheless, the connection between these two aspects is still elusive. In this work, we report such a connection by showing that a standard biochemical model of the chemotactic network is mathematically equivalent to an information-theoretically optimal filtering dynamics. Moreover, we demonstrate that an experimentally observed nonlinear response relation can be reproduced from the optimal dynamics. These results suggest that the biochemical network of E. coli chemotaxis is designed to optimally extract gradient information in a noisy condition.
Pulsar Magnetosphere : A General Relativistic Treatment
Creators: name: Kim, Hongsu
name: Lee, Hyung Mok
name: Lee, Chul H.
name: Lee, Hyun Kyu
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A fully general relativistic description of the pulsar magnetosphere is provided. To be more concrete, a study of the pulsar magnetosphere is performed in the context of general relativistic magnetohydrodynamics (MHD) employing the so-called Grad-Shafranov approach. Not surprisingly, the resulting Grad-Shafranov equations and all the other related general relativistic MHD equations turn out to take essentially the same structures as those for the (rotating) black hole magnetosphere. Other different natures between the two cases including the structure of singular surfaces of MHD flows in each magnetosphere are essentially encoded in the different spacetime (metric) contents. In this way, the pulsar and the black hole magnetospheres can be described in an unified fashion. Particularly, the direction of poloidal currents circulating in the neutron star magnetosphere turns out to be the same as that of currents circulating in the black hole magnetosphere which, in turn, leads to the pulsar and the black hole spin-downs via the ``magnetic braking''.
description: 42 pages, 3 figures, Mon. Not. R. Astron. Soc.(MNRAS), in press