cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Impact of Social Capital on Agricultural Income Among Corporate Farms in the Czech Republic
Creators: name: Wolz, Axel
name: Fritzsch, Jana
name: Reinsberg, Klaus
name: Wolz, Axel
name: Fritzsch, Jana
name: Reinsberg, Klaus
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Institutional and Behavioral Economics
subject: corporate farms
subject: social capital
subject: cross sectional models
subject: Czech Republic

description: In the Czech Republic, agricultural production is still dominated by corporate farms. However, not all of them had been equally successful, economically. In general, a varying adoption of production factors is identified as being of influence. Whether their ability to collaborate with other farms is an additional factor which has been discussed under the concept of social capital since quite some time will be analysed in this paper. Based on the findings of a survey among a sample of 166 corporate farms by adopting factor and multiple regression analysis it can be deduced that social capital is indeed a significant factor determining the level of agricultural income.
Update on Fermion Mass Models with an Anomalous Horizontal U(1) Symmetry
Creators: name: Chankowski, P. H.
name: Kowalska, K.
name: Lavignac, S.
name: Pokorski, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We reconsider models of fermion masses and mixings based on a gauge anomalous horizontal U(1) symmetry. In the simplest model with a single flavon field and horizontal charges of the same sign for all Standard Model fields, only very few charge assignements are allowed when all experimental data, including neutrino oscillation data, is taken into account. We show that a precise description of the observed fermion masses and mixing angles can easily be obtained by generating sets of the order one parameters left unconstrained by the U(1) symmetry. The corresponding Yukawa matrices show several interesting features which may be important for flavour changing neutral currents and CP violation effects in supersymmetric models.
description: 23 pages, 8 figures
Формирование организационно-управленческих компетенций будущего рабочего, или Как подготовить мастера
Creators: name: ГАЙНЕЕВ Эдуард Робертович
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: конкурс
чемпионат WorldSkills
организационноуправленческие компетенции
квалифицированный рабочий
мастер производственного обучения
наставник

description: Статья посвящена формированию и развитию у студентов организационно-управленческих компетенций посредством участия в системе конкурсов профессионального мастерства и чемпионатов WorldSkills. Рассмотрена методика формирования организационноуправленческих компетенций, необходимых современному рабочему высокой квалификации, будущему мастеру производственного обучения, наставнику на предприятии
Spousal Effect and Timing of Farmers' Early Retirement Decisions
Creators: name: Vare, Minna
name: Vare, Minna
Publisher: name: Unknown
Year: 2005
Subjects: subject: Farm Management
subject: Labor and Human Capital
subject: duration
subject: early retirement
subject: farming couple
subject: succession

description: The retirement decisions of individuals are strongly influenced by spousal retirement, financial incentives and institutional constraints such as access to early retirement benefits. In the European Union (EU), farm retirement is encouraged by early retirement provisions for farmers. As exit from farming determines the characteristics of structural change in agriculture, it is important to find out how spousal retirement and economic incentives affect the timing and type of retirement decisions among elderly farmers. This paper analyses the timing of early retirement decisions of farming couples using duration analysis and different exit channels. The empirical analysis is based on Finnish farm-level panel data for the period 1993-1998. The results suggest that an expected pension particularly advances farm transfers. Farming couples are found to co-ordinate their early retirement according to spousal retirement under other pension schemes.
Model-Based Generalization Under Parameter Uncertainty Using Path Integral Control
Creators: name: Abraham, Ian
name: Handa, Ankur
name: Ratliff, Nathan
name: Lowrey, Kendall
name: Murphey, Todd D.
name: Fox, Dieter
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This work addresses the problem of robot interaction in complex environments where online control and adaptation is necessary. By expanding the sample space in the free energy formulation of path integral control, we derive a natural extension to the path integral control that embeds uncertainty into action and provides robustness for model-based robot planning. Our algorithm is applied to a diverse set of tasks using different robots and validate our results in simulation and real-world experiments. We further show that our method is capable of running in real-time without loss of performance. Videos of the experiments as well as additional implementation details can be found at https://sites.google.com/view/emppi.
Consumer Attitudes Behind Organic Foods Perception: An Illustration in a Spanish Area.
Creators: name: Robles, Rita Robles
name: Vannini, Luigi
name: De La Puente, Telesforo
name: Fernandez-Revuelta, Jose J.
name: Robles, Rita Robles
name: Vannini, Luigi
name: De La Puente, Telesforo
name: Fernandez-Revuelta, Jose J.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Consumer/Household Economics
subject: organic food marketing
subject: consumer perception
subject: consumer attitudes
subject: food quality

description: The notable growth experienced by organic agriculture in Spain, has not been accompanied by a similar development in the consumption of organic foods, with most of the organic agricultural output being exported. This study focuses in analyzing Spanish consumer's attitude versus organic foods, in order to identify the factors that influence the demand. For this purpose, 130 surveys are conducted among consumers in a medium-sized city in Spain and processed using different statistical analysis, determining the level of knowledge about these products, consumer's shopping habits, and criteria, which support or dissuade the consumption of these products.
title: Cinema's spectral sounds: Memory, history and politics
Creators: name: Lovatt, Philippa
Publisher: name: University of Glasgow
Year: 2011
Subjects: subject: cinema, sound, memory, history, politics, censorship, Thailand, Iran, China

description: Expanding on Robert Stam’s idea that sound and image tracks in film can ‘mutually jostle, undercut [and] haunt…each other’ creating what he calls a ‘heterochronic… cinema , this thesis argues that close analysis of a film’s sound design can sometimes reveal a break in the seamlessness of a film’s narrative and formal structure when sound and image are used asynchronously. Synthesising Stam’s formal approach with the theoretical framework of temporal critique put forward by Bliss Cua Lim in her study of the ghost film, this study demonstrates how, like the ghost figure, this use of ‘unruly’ sound can similarly disrupt the concept of time as linear and the nation-state as a stable, homogenous entity. Analysing the use of ‘spectral sound’ in a group of important films produced in cultures of censorship by Bahman Ghobadi, Jia Zhangke and Apichatpong Weerasethakul, the thesis argues that film form can itself be political – creating a sense of temporal dislocation that ‘makes the present waver’. Alert to the ethical possibilities of listening to film, ‘Cinema’s Spectral Sounds’ argues that film sound can also play a crucial restorative role in that it can reposition oppressed memories and experiences centrally within the discourse of the present.
Stability and breakup of liquid threads and annular layers in a corrugated tube
Creators: name: Wang, Qiming
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76D45

description: We study the stability and breakup behavior of an axisymmetric liquid thread which is surrounded by another viscous fluid layer through a long wave approximation. The two fluids are immiscible and confined in a concentrically placed cylindrical tube. The effect of the tube wall corrugation is taken into account in the model, which allows the access of the interaction between the wall shape and the thread interfacial dynamics. The linearized system is studied by the Floquet theory due to the presence of non-constant coefficients in the equation and the spectrum is computed numerically via the Fourier-Floquet-Hill method. The resulting features agree qualitatively with those obtained based on a lubrication model in the thin annulus limit, where the short-wave disturbances that would be stabilizing owing to the capillarity in the absence of wall corrugation, can excite some unstable long waves. Those results from the linear theory are also confirmed numerically by the direct numerical simulation on the evolution equations. Meanwhile, a transition on the dominant modes from the one for a tube without corrugation to the one with wall shape included is found. Finally the drop formation is shown in the nonlinear regime when the pinch off of the core thread is obtained. The annular film drainage regime is also approached slowly along with pinching when the tube wall is close to the thread interface. In addition, our results demonstrate the possibility to suppress pinching, depending on the averaged annular layer thickness and the variation in tube radius.
description: 26 pages, 12 figures
Evidence of Overcharging in the Complexation between Oppositely Charged Polymers and Surfactants
Creators: name: Berret, Jean-Francois
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report on the complexation between charged-neutral block copolymers and oppositely charged surfactants studied by small-angle neutron scattering. Two block copolymers/surfactant systems are investigated, poly(acrylic acid)-b-poly(acrylamide) with dodecyltrimethylammonium bromide and poly(trimethylammonium ethylacrylate methylsulfate)-b-poly(acrylamide) with sodium dodecyl sulfate. The two systems are similar in terms of structure and molecular weight but have different electrostatic charges. The neutron scattering data have been interpreted in terms of a model that assumes the formation of mixed polymer-surfactant aggregates, also called colloidal complexes. These complexes exhibit a core-shell microstructure, where the core is a dense coacervate microphase of micelles surrounded by neutral blocks. Here, we are taking advantage of the fact that the complexation results in finite-size aggregates to shed some light on the complexation mechanisms. In order to analyze quantitatively the neutron data, we develop two different approaches to derive the number of surfactant micelles per polymer in the mixed aggregates and the distributions of aggregation numbers. With these results, we show that the formation of the colloidal complex is in agreement with the overcharging predictions. In both systems, the amount of polyelectrolytes needed to build the core-shell colloids always exceeds the number that would be necessary to compensate the charge of the micelles. For the two polymer-surfactant systems investigated, the overcharging ratios are 0.66 and 0.38.
description: 20 pages, 7 Figures, 6 Tables
Productivity and Quality-Environmental Changes in Marketing Co-operatives: An Analysis on the Horticultural Sector
Creators: name: Galdeano-Gomez, Emilio
name: Cespedes-Lorente, Jose
name: Rodriguez, Manuel Rodriguez
name: Galdeano-Gomez, Emilio
name: Cespedes-Lorente, Jose
name: Rodriguez, Manuel Rodriguez
Publisher: name: Unknown
Year: 2005
Subjects: subject: Agribusiness
subject: Productivity Analysis
subject: productivity
subject: quality-environment
subject: efficiency
subject: marketing co-operative
subject: horticultural sector

description: The object of the present paper is to analyse productivity incorporating quality-environmental changes in marketing co-operatives. Firstly, it reviews competitiveness factors in the current European agri-food market, especially in relation to the fruit and vegetables sector. Secondly, the productivity trend is studied empirically using nonparametric methods (Malmquist indices) and taking as reference panel data of Andalusian horticultural co-operatives for the period 1994-2001. For this purpose productivity is decomposed into technological change, efficiency and quality-environmental change. Additionally, the correlation of these results with other economic variables is analysed. The indicators obtained show a relevant increase in efficiency for the period under study and a high relationship between the results and product quality-environmental improvement.
Анализ моделей формирования профессионально-специализированных компетенций студентов вузов
Creators: name: КОНОВАЛОВ Антон Андреевич
name: БУТОРИНА Наталья Иннокентьевна
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: модель обучения
педагогическое образование
педагог профессионального обучения
профессионально-специализированные компетенции
результат профессиональной подготовк

description: В статье представлен анализ разработанных и апробированных в педагогической практике моделей формирования профессионально-специализированных компетенций у студентов учреждений педагогического и профессионально-педагогического образования, выявлены общие и особенные характеристики данных моделей. Результаты исследования могут стать научно-теоретической основой для широкой разработки и внедрения моделей подготовки специалистов в области профессионального образования, в том числе профессионально-педагогического
Unidirectional spin transport of a spin-orbit-coupled atomic matter wave using a moving Dirac $δ$-potential well
Creators: name: Qin, Jieli
name: Zhou, Lu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study the transport of a spin-orbit-coupled atomic matter wave using a moving Dirac $δ$-potential well. In a spin-orbit-coupled system, bound states can be formed in both ground and excited energy levels with a Dirac $δ$ potential. Because Galilean invariance is broken in a spin-orbit-coupled system, moving of the potential will induce a velocity-dependent effective detuning. This induced detuning breaks the spin symmetry and makes the ground-state transporting channel be spin-$\uparrow$ ($\downarrow$) favored while makes the excited-state transporting channel be spin-$\downarrow$ ($\uparrow$) favored for a positive-direction (negative-direction) transporting. When the $δ$-potential well moves at a small velocity, both the ground-state and the excited-state channels contribute to the transportation, and thus both the spin components can be efficiently transported. However, when the moving velocity of the $δ$-potential well exceeds a critical value, the induced detuning is large enough to eliminate the excited bound state, and makes the ground bound state the only transporting channel, in which only the spin-$\uparrow$ ($\downarrow$) component can be efficiently transported in a positive (negative) direction. This work demonstrates a prototype of unidirectional spin transport.
Профессионально важные качества и компетенции, обеспечивающие безопасность профессиональной деятельности
Creators: name: ЛЫЖИН Антон Игоревич
name: ЮСУПОВ Дамир Касимович
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: безопасность профессиональной деятельности
человеческий фактор
профессионально важные качества
профессиональные компетенции

description: В статье обосновывается необходимость системной работы над снижением вредного влияния человеческого фактора в профессиональной деятельности. Предлагается модель психолого-педагогического сопровождения для формирования профессионально важных качеств и компетенций, обеспечивающих безопасность профессиональной деятельности. На основе теоретического анализа выделяется перечень профессионально важных качеств, универсальных для профессий, связанных с риско
The Size of the Radio-Emitting Region in Low-luminosity Active Galactic Nuclei
Creators: name: Anderson, James M.
name: Ulvestad, James S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used the VLA to study radio variability among a sample of 18 low luminosity active galactic nuclei (LLAGNs), on time scales of a few hours to 10 days. The goal was to measure or limit the sizes of the LLAGN radio-emitting regions, in order to use the size measurements as input to models of the radio emission mechanisms in LLAGNs. We detect variability on typical time scales of a few days, at a confidence level of 99%, in half of the target galaxies. Either variability that is intrinsic to the radio emitting regions, or that is caused by scintillation in the Galactic interstellar medium, is consistent with the data. For either interpretation, the brightness temperature of the emission is below the inverse-Compton limit for all of our LLAGNs, and has a mean value of about 1E10 K. The variability measurements plus VLBI upper limits imply that the typical angular size of the LLAGN radio cores at 8.5 GHz is 0.2 milliarcseconds, plus or minus a factor of two. The ~ 1E10 K brightness temperature strongly suggests that a population of high-energy nonthermal electrons must be present, in addition to a hypothesized thermal population in an accretion flow, in order to produce the observed radio emission.
description: 61 pages, 17 figures, 10 tables. Accepted for publication in the Astrophysical Journal
Platonic Gravitating Skyrmions
Creators: name: Ioannidou, Theodora
name: Kleihaus, Burkhard
name: Kunz, Jutta
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct globally regular gravitating Skyrmions, which possess only discrete symmetries. In particular, we present tetrahedral and cubic Skyrmions. The SU(2) Skyrme field is parametrized by an improved harmonic map ansatz. Consistency then requires also a restricted ansatz for the metric. The numerical solutions obtained within this approximation are compared to those obtained in dilaton gravity.
description: 13 pages, 4 figures
Fast solvers for time-harmonic Maxwell’s equations in 3D
Creators: name: Aruliah, Dhavide Arjunan
Publisher: name: University of British Columbia
Year: 2009

description: The speed of iterative solvers for discretizations of partial differential equations (PDEs) is a significant bottleneck in the performance of codes designed to solve large-scale electromagnetic inverse problems. A single data inversion requires solving Maxwell's equations dozens if not hundreds of times. An inherent difficulty in geophysical contexts is that the conductivity and permeability coefficients may exhibit discontinuities spanning several orders of magnitude. Furthermore, in the air, the conductivity effectively vanishes. In standard formulations of Maxwell's equations, the curl operator that dominates the PDE operator leads to strong mixing of field components and illconditioning of linear systems resulting from standard discretizations. The primary objective of this research is to build fast iterative solvers for the forward-modeling problem associated with electromagnetic inverse problems in the frequency domain. Toward this goal, a Helmholtz decomposition of the electric field using a Coulomb gauge condition recasts the PDE problem in terms of scalar and vector potentials. The resulting indefinite system is then stabilized by addition of a vanishing term that lies in the kernel of the dominant curl operator. Finally, an extra differentiation recasts the PDE system in a diagonally-dominant form reminiscent of a "pressure-Poisson" formulation for incompressible fluid flow. The continuous PDE problem obtained is equivalent to the original Maxwell's system but has a structure that is amenable to reliable solution techniques. Using a finite-volume scheme, the PDE is discretized on a staggered grid in three dimensions. The discretization obtained possesses conservation properties typical of finite-volume methods. Furthermore, interface conditions imposed by discontinuities in the material coefficients are sensibly accounted for in deriving the discretization. Although the simple representation of the media on a Cartesian tensor-product grid uses staircase approximations of surfaces of discontinuity of the material coefficients, some analysis and a numerical study demonstrate the suitability of such coarse approximations for diffusive problems. The discretization yields a non-Hermitian sparse linear system of algebraic equations; various preconditioners for Krylov-subspace methods are described, analyzed, implemented, and tested. Of particular interest is a multigrid preconditioner that exploits both the structure of the PDE problem and the availability of well-established solvers for elliptic PDE problems (in particular, Dendy's BOXMG solver). The end result is a robust solver for the forward-modeling equations that can be incorporated within a competitive inverse problem code.
Analysing Family Farm Succession: A Probit and a Competing Risk Approach
Creators: name: Glauben, Thomas
name: Tietje, Hendrik
name: Weiss, Christoph R.
name: Glauben, Thomas
name: Tietje, Hendrik
name: Weiss, Christoph R.
Publisher: name: Unknown
Year: 2005
Subjects: subject: Farm Management
subject: intrafamily succession
subject: survey data
subject: competing risk

description: The present study examines family and farm characteristics affecting the choice and the timing of intergenerational farm transfers. Using survey data which are linked to accounting data for 272 farms in Northern Germany, we use a probit approach to examine whether specific farm and family characteristics are related to the likelihood of succession within a given period. We go beyond the existing literature by applying a competing risk approach to study the process and thus the timing, respectively of the two competing events - succession or exit from farming. We find that farm characteristics significantly influence succession considerations to the extent that they affect the value of the farm for the potential successor.
The antinucleon-nucleon interaction at low energy : annihilation dynamics
Creators: name: Klempt, E.
name: Batty, C.
name: Richard, J. -M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The general properties of antiproton-proton annihilation at rest are presented, with special focus on the two-meson final states. The data exhibit remarkable dynamical selection rules : some allowed annihilation modes are suppressed by one order of magnitude with respect to modes of comparable phase-space. Various phenomenological analyses are reviewed, based on microscopic quark dynamics or symmetry considerations. The role of initial- and final-state interaction is also examined.
description: 128 pages, 49 tables, 27 figures
Extinction curves expected in young galaxies
Creators: name: Hirashita, Hiroyuki
name: Nozawa, Takaya
name: Kozasa, Takashi
name: Ishii, Takako T.
name: Takeuchi, Tsutomu T.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the extinction curves of young galaxies in which dust is supplied from Type II supernovae (SNe II) and/or pair instability supernovae (PISNe). We adopt Nozawa et al. (2003) for compositions and size distribution of grains formed in SNe II and PISNe. We find that the extinction curve is quite sensitive to internal metal mixing in supernovae (SNe). The extinction curves predicted from the mixed SNe are dominated by SiO2 and is characterised by steep rise from infrared to ultraviolet (UV). The dust from unmixed SNe shows shallower extinction curve, because of the contribution from large-sized (~ 0.1 um) Si grains. However, the progenitor mass is important in unmixed SNe II: If the progenitor mass is smaller than ~ 20 Msun, the extinction curve is flat in UV; otherwise, the extinction curve rises toward the short wavelength. The extinction curve observed in a high-redshift quasar (z=6.2) favours the dust production by unmixed SNe II. We also provide some useful observational quantities, so that our model might be compared with future high-z extinction curves.
description: 11 pages, 6 figures, Accepted for publication in MNRAS
Embedding Directed Graphs in Potential Fields Using FastMap-D
Creators: name: Gopalakrishnan, Sriram
name: Cohen, Liron
name: Koenig, Sven
name: Kumar, T. K. Satish
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Embedding undirected graphs in a Euclidean space has many computational benefits. FastMap is an efficient embedding algorithm that facilitates a geometric interpretation of problems posed on undirected graphs. However, Euclidean distances are inherently symmetric and, thus, Euclidean embeddings cannot be used for directed graphs. In this paper, we present FastMap-D, an efficient generalization of FastMap to directed graphs. FastMap-D embeds vertices using a potential field to capture the asymmetry between the pairwise distances in directed graphs. FastMap-D learns a potential function to define the potential field using a machine learning module. In experiments on various kinds of directed graphs, we demonstrate the advantage of FastMap-D over other approaches.
description: 9 pages, Published in Symposium on Combinatorial Search(SoCS-2020). Erratum with updated Results
Toward Radiation-Magnetohydrodynamic Simulations in Core-Collapse Supernovae
Creators: name: Kotake, Kei
name: Ohnishi, Naofumi
name: Yamada, Shoichi
name: Sato, Katsuhiko
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a current status of our radiation-magnetohydrodynamic code for the study of core-collapse supernovae. In this contribution, we discuss the accuracy of our newly developed numerical code by presenting the test problem in a static background model. We also present the application to the spherically symmetric core-collapse simulations. Since close comparison with the previously published models is made, we are now applying it for the study of magnetorotational core-collapse supernovae.
description: 4 pages, 2 figures, Proceedings of the Third 21COE Symposium : Astrophysics as Interdisciplinary Science, Waseda University, Japan, September 1--3, 2005, to appear in IOP Conference Series
Traceability and Labelling of GMOs as a Framework for Risk Management in European Regulation
Creators: name: Charlier, Christophe
name: Charlier, Christophe
Publisher: name: Unknown
Year: 2005
Subjects: subject: Risk and Uncertainty
subject: traceability
subject: labelling
subject: GMO
subject: risk management
subject: food safety

description: Traceability and labelling are required by European regulation for food produced from GMOs. For this regulation one of the main advantages of traceability consists in providing information that should allow the precise withdrawal of products from the production process. This paper tests this idea. For that purpose, it seeks to establish whether the mandatory traceability will create an information set refined enough to locate GMO products in the production process. In this respect, the limits of the European regulation are pointed out. It is shown however that results are improved as soon as labelling is introduced alongside the requirement of traceability.
Педагогические условия активизации художественно-образной сферы студентов в курсе музыкальной литературы
Creators: name: ПЕЧЕРИЦА Анна Станиславовна
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: профессионализм
художественно-образная сфера
художественный образ
музыкант-исполнитель
творчески-эвристический процесс

description: В статье приведены результаты диагностики умения студентов музыкального колледжа оперировать интонационно-образными представлениями в сочетании с уровнем эмоционального восприятия. В результате опытного исследования выявлены компоненты образовательного процесса, необходимые для развития художественно-образного восприятия музыкальных произведений. Рассмотрены направления педагогической деятельности, в совокупности определяющие активное формирование художественно-образной сферы
Comparison of 13CO Line and Far-Infrared Continuum Emission as a Diagnostic of Dust and Molecular Gas Physical Conditions: III. Systematic Effects and Scientific Implications
Creators: name: Wall, W. F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Far-infrared continuum data from the {\it COBE}/{\it DIRBE} instrument were combined with Nagoya 4-m $\cOone$ spectral line data to infer the multiparsec-scale physical conditions in the Orion$ $A and B molecular clouds, using 140$\um$/240$\um$ dust color temperatures and the 240$\um$/$\cOone$ intensity ratios. In theory, the ratio of far-IR, submillimeter, or millimeter continuum to that of a $\cO$ (or $\Co$) rotational line can place reliable upper limits on the temperature of the dust and molecular gas on multi-parsec scales; on such scales, both the line and continuum emission are optically thin, resulting in a continuum-to-line ratio that suffers no loss of temperature sensitivity in the high-temperature limit as occurs for ratios of CO rotational lines or ratios of continuum emission in different wavelength bands. Two-component models fit the Orion data best, where one has a fixed-temperature and the other has a spatially varying temperature. The former represents gas and dust towards the surface of the clouds that are heated primarily by a very large-scale (i.e. $\sim 1 $kpc) interstellar radiation field. The latter represents gas and dust at greater depths into the clouds and are shielded from this interstellar radiation field and heated by local stars. The inferred physical conditions are consistent with those determined from previously observed maps of $\COone$ and $\Jtwo$ that cover the entire Orion$ $A and B molecular clouds. The models require that the dust-gas temperature difference is 0$\pm 2 $K. If this surprising result applies to much of the Galactic ISM, except in unusual regions such as the Galactic Center, then there are a number implications.
description: The work of Schnee et al. 2006 is relevant here. This is now mentioned in the Discussion and in the Conclusions. In the third version, I've corrected a few typos and slightly changed the emphasis on the cold gas/dust. In the version of March 2007, I've fixed a few typos and updated a few references
Influence of optical aberrations in an atomic gyroscope
Creators: name: Fils, Jerome
name: Leduc, Florence
name: Bouyer, Philippe
name: Holleville, David
name: Dimarcq, Noel
name: Clairon, André
name: Landragin, Arnaud
Publisher: name: arXiv
Year: 2005
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In atom interferometry based on light-induced diffraction, the optical aberrations of the laser beam splitters are a dominant source of noise and systematic effect. In an atomic gyroscope, this effect is dramatically reduced by the use of two atomic sources. But it remains critical while coupled to fluctuations of atomic trajectories, and appears as a main source of noise to the long term stability. Therefore we measure these contributions in our setup, using cold Cesium atoms and stimulated Raman transitions.
Absorption and scattering properties of arbitrarily shaped particles in the Rayleigh domain: A rapid computational method and a theoretical foundation for the statistical approach
Creators: name: Min, M.
name: Hovenier, J. W.
name: Dominik, C.
name: de Koter, A.
name: Yurkin, M. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We provide a theoretical foundation for the statistical approach for computing the absorption properties of particles in the Rayleigh domain. We present a general method based on the Discrete Dipole Approximation (DDA) to compute the absorption and scattering properties of particles in the Rayleigh domain. The method allows to separate the geometrical aspects of a particle from its material properties. Doing the computation of the optical properties of a particle once, provides them for any set of refractive indices, wavelengths and orientations. This allows for fast computations of e.g. absorption spectra of arbitrarily shaped particles. Other practical applications of the method are in the interpretation of atmospheric and radar measurements as well as computations of the scattering matrix of small particles as a function of the scattering angle. In the statistical approach, the optical properties of irregularly shaped particles are represented by the average properties of an ensemble of particles with simple shapes. We show that the absorption cross section of an ensemble of arbitrarily shaped particles with arbitrary orientations can always be uniquely represented by the average absorption cross section of an ensemble of spheroidal particles with the same composition and fixed orientation. This proves for the first time that the statistical approach is generally viable in the Rayleigh domain.
description: Accepted for publication in JQSRT
Dual-Wavelength ALMA Observations of Dust Rings in Protoplanetary Disks
Creators: name: Long, Feng
name: Pinilla, Paola
name: Herczeg, Gregory J.
name: Andrews, Sean M.
name: Harsono, Daniel
name: Johnstone, Doug
name: Ragusa, Enrico
name: Pascucci, Ilaria
name: Wilner, David J.
name: Hendler, Nathan
name: Jennings, Jeff
name: Liu, Yao
name: Lodato, Giuseppe
name: Menard, Francois
name: van de Plas, Gerrit
name: Dipierro, Giovanni
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new Atacama Large Millimeter/submillimeter Array (ALMA) observations for three protoplanetary disks in Taurus at 2.9\,mm and comparisons with previous 1.3\,mm data both at an angular resolution of $\sim0.''1$ (15\,au for the distance of Taurus). In the single-ring disk DS Tau, double-ring disk GO Tau, and multiple-ring disk DL Tau, the same rings are detected at both wavelengths, with radial locations spanning from 50 to 120\,au. To quantify the dust emission morphology, the observed visibilities are modeled with a parametric prescription for the radial intensity profile. The disk outer radii, taken as 95\% of the total flux encircled in the model intensity profiles, are consistent at both wavelengths for the three disks. Dust evolution models show that dust trapping in local pressure maxima in the outer disk could explain the observed patterns. Dust rings are mostly unresolved. The marginally resolved ring in DS Tau shows a tentatively narrower ring at the longer wavelength, an observational feature expected from efficient dust trapping. The spectral index ($α_{\rm mm}$) increases outward and exhibits local minima that correspond to the peaks of dust rings, indicative of the changes in grain properties across the disks. The low optical depths ($τ\sim$0.1--0.2 at 2.9\,mm and 0.2--0.4 at 1.3\,mm) in the dust rings suggest that grains in the rings may have grown to millimeter sizes. The ubiquitous dust rings in protoplanetary disks modify the overall dynamics and evolution of dust grains, likely paving the way towards the new generation of planet formation.
description: accepted for publication in ApJ
Methanol emission from low mass protostars
Creators: name: Maret, S.
name: Ceccarelli, C.
name: Tielens, A. G. G. M.
name: Caux, E.
name: Lefloch, B.
name: Faure, A.
name: Castets, A.
name: Flower, D. R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present observations of methanol lines in a sample of Class 0 low mass protostars. Using a 1-D radiative transfer model, we derive the abundances in the envelopes. In two sources of the sample, the observations can only be reproduced by the model if the methanol abundance is enhanced by about two order of magnitude in the inner hot region of the envelope. Two other sources show similar jumps, although at a lower confidence level. The observations for the other three sources are well reproduced with a constant abundance, but the presence of a jump cannot be ruled out. The observed methanol abundances in the warm gas around low mass protostars are orders of magnitude higher than gas phase chemistry models predict. Hence, in agreement with other evidences, this suggest that the high methanol abundance reflects recent evaporation of ices due to the heating by the newly formed star. The observed abundance ratios of CH3 OH, H2 CO, and CO are in good agreement with grain surface chemistry models. However, the absolute abundances are more difficult to reproduce and may point towards the presence of multiple ice components in these regions.
description: 21 pages, 8 figures, 10 tables. Accepted for publication in A&A
Statistical descriptions of nonlinear systems at the onset of chaos
Creators: name: Coraddu, Massmimo
name: Lissia, Marcello
name: Tonelli, Roberto
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Chaotic Dynamics (nlin.CD)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Ensemble of initial conditions for nonlinear maps can be described in terms of entropy. This ensemble entropy shows an asymptotic linear growth with rate K. The rate K matches the logarithm of the corresponding asymptotic sensitivity to initial conditions λ. The statistical formalism and the equality K=λcan be extended to weakly chaotic systems by suitable and corresponding generalizations of the logarithm and of the entropy. Using the logistic map as a test case we consider a wide class of deformed statistical description which includes Tsallis, Abe and Kaniadakis proposals. The physical criterion of finite-entropy growth K strongly restricts the suitable entropies. We study how large is the region in parameter space where the generalized description is useful.
description: RevTeX preprint 10 pages, 4 figures, to appear in The European Physical Journal B
Dynamic coherent perfect absorption in nonlinear metasurfaces
Creators: name: Alaee, Rasoul
name: Vaddi, Yaswant
name: Boyd, Robert W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a tunable coherent perfect absorber based on ultrathin nonlinear metasurfaces. The nonlinear metasurface is made of plasmonic nanoantennas coupled to an epsilon-near-zero material with a large optical nonlinearity. The coherent perfect absorption is achieved by controlling the relative phases of the input beams. We show that the optical response of the nonlinear metasurface can be tuned from a complete to a partial absorption by changing the intensity of the pump beam. The proposed nonlinear metasurface can be used to design optically tunable thermal emitters, modulators, and sensors.
description: 2019 Optical Society of America. Optical Society of America]. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited
Виртуальный класс как новый сценарий обучения в вузе в условиях пандемии
Creators: name: АНТОНОВА Наталья Леонидовна
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: высшее образование
цифровизация
виртуальный класс
онлайн-обучение
цифровые компетенции

description: В статье на материалах интервью (n=18) представлен анализ отношения студентов первого года обучения УрФУ к модели виртуального класса. По результатам исследования выделены преимущества и недостатки виртуального класса. Даны рекомендации преподавателям и студентам для преодоления барьеров онлайн-обучения в условиях цифровизации высшего образования
II. Arbeitstagung der Kommission für Glauben und Kirchenverfassung
Creators: name: Joest, Wilfried
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 4 (1964): Ökumenische Rundschau, Band 13, Heft 4
Thermal Conductivity for a Momentum Conserving Model
Creators: name: Basile, Giada
name: Bernardin, Cedric
name: Olla, Stefano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce a model whose thermal conductivity diverges in dimension 1 and 2, while it remains finite in dimension 3. We consider a system of oscillators perturbed by a stochastic dynamics conserving momentum and energy. We compute thermal conductivity via Green-Kubo formula. In the harmonic case we compute the current-current time correlation function, that decay like $t^{-d/2}$ in the unpinned case and like $t^{-d/2-1}$ if a on-site harmonic potential is present. This implies a finite conductivity in $d\ge 3$ or in pinned cases, and we compute it explicitly. For general anharmonic strictly convex interactions we prove some upper bounds for the conductivity that behave qualitatively as in the harmonic cases.
description: Accepted for the publication in Communications in Mathematical Physics
Study of the eta-eta' system in the two mixing angle scheme
Creators: name: Escribano, R.
name: Frere, J. -M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: An analysis of various decay processes is performed using the two mixing angle description of the $η$-$η^\prime$ system, incorporating the link to the gluonic sector through anomalies. The agreement is excellent. For comparison with previous works, our results are expressed both in the ``octet-singlet'' and in the ``quark-flavour'' basis. It turns out that at the present experimental accuracy, the two angles are significantly different in the former, but not in the latter basis. The implications of our analysis for the Large $N_c$ $χ$PT predictions are also discussed.
description: 15 pages, JHEP style. Comments on the VMD description of the VPgamma decays, the error correlations,the scale dependence of f0, and the implications of the analysis for Large Nc ChpT are included
Представления цифрового поколения о главных ценностях жизни
Creators: name: БАСТРАКОВА Наталия Семеновна
name: МУХЛЫНИНА Ольга Викторовна
name: ШАРОВ Антон Александрович
Publisher: name: Профессиональное образование и рынок труда
Year: 2020
Subjects: цифровое поколение
материальные ценности
идеальные ценности
виртуальные ценности
личные ценности
жизненные ценности
традиционные ценности

description: В статье рассматривается проблема ценностей жизни у представителей цифрового поколения. Авторами статьи проанализированы результаты анкетирования студентов вуза и колледжа о материальных, идеальных, виртуальных, личных и жизненных ценностях. Отмечено существенное влияние информационно-коммуникационного пространства на становление и развитие цифрового поколения
Annihilation trajectory of defects in smectic-C films
Creators: name: Tang, Xingzhou
name: Selinger, Jonathan V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In a 2D liquid crystal, each topological defect has a topological charge and a characteristic orientation, and hence can be regarded as an oriented particle. Theories predict that the trajectories of annihilating defects depend on their relative orientation. Recently, these predictions have been tested in experiments on smectic-C films. Those experiments find curved trajectories that are similar to the predictions, but the detailed relationship between the defect orientations and the far-field director is different. To understand this difference, we extend the previous theories by adding the effects of elastic anisotropy, and find that it significantly changes the curved trajectories.
Die Bewegung für Glauben und Kirchenverfassung am Anfang einer neuen Periode
Creators: name: Vischer, Lukas
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 13 Nr. 4 (1964): Ökumenische Rundschau, Band 13, Heft 4
Migration of WAFL to BSD
Creators: name: Reddy, Sreelatha S.
Publisher: name: University of British Columbia
Year: 2009

description: The UNIX kernel has been around for quite some time. Considering this time factor, we realise that compared to the other components of the operating system, the filesystem has yet to see the implementation of novel and innovative features. However, filesystem research has continued for other kernels. The Write Anywhere File Layout filesystem developed at Network Appliance has been proved to be a reliable and new filesystem with its ability to take snaphots for backups and to schedule consistency points for fast recovery. WAFL has been built as a filesystem component in the ONTAP kernel which runs on the NFS filer. WAFL has been optimized for the ONTAP environment. The ONTAP kernel differs considerably from the FreeBSD kernel. ONTAP is an appliance operating system optimized for fast NFS service while the FreeBSD kernel is a general-purpose operating system. There exist architectural and semantic distinctions in the design of the two kernels. This thesis was essentially an attempt to bridge these differences by integrating WAFL into FreeBSD. We focus more on the design issues and the problems encountered during the migration of WAFL from its old environment to its new environment, rather than performance. By introducing the ONTAP WAFL to FreeBSD, we are interested in knowing how WAFL would fare in the BSD kernel given that the BSD and ONTAP kernels are quite different. We also want to see how WAFL performs as compared to FFS, the local filesystem in the FreeBSD kernel. In this thesis, we describe the design and implementation issues encountered while porting the WAFL filesystem to the BSD kernel. The implementation has been carried out in the current version of the FreeBSD 4.0 kernel.
The SQ-universality and residual properties of relatively hyperbolic groups
Creators: name: Arzhantseva, G.
name: Minasyan, A.
name: Osin, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65, 20F67

description: We study residual properties of relatively hyperbolic groups. In particular, we show that if a group $G$ is non-elementary and hyperbolic relative to a collection of proper subgroups, then $G$ is SQ-universal.
description: 14 pages, no figures. Final version: a reference to T. Delzant added