cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The reduced spaces of a symplectic Lie group action
Creators: name: Ortega, Juan-Pablo
name: Ratiu, Tudor S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53D20

description: There exist three main approaches to reduction associated to canonical Lie group actions on a symplectic manifold, namely, foliation reduction, introduced by Cartan, Marsden-Weinstein reduction, and optimal reduction, introduced by the authors. When the action is free, proper, and admits a momentum map these three approaches coincide. The goal of this paper is to study the general case of a symplectic action that does not admit a momentum map and one needs to use its natural generalization, a cylinder valued momentum map introduced by Condevaux, Dazord, and Molino. In this case it will be shown that the three reduced spaces mentioned above do not coincide, in general. More specifically, the Marsden-Weinstein reduced spaces are not symplectic but Poisson and their symplectic leaves are given by the optimal reduced spaces. Foliation reduction produces a symplectic reduced space whose Poisson quotient by a certain Lie group associated to the group of symmetries of the problem equals the Marsden-Weinstein reduced space. We illustrate these constructions with concrete examples, special emphasis being given to the reduction of a magnetic cotangent bundle of a Lie group in the situation when the magnetic term ensures the non-existence of the momentum map for the lifted action. The precise relation of the cylinder valued momentum map with group valued momentum maps for Abelian Lie groups is also given.
description: 37 pages
Key to the midway : masculinity at work in a Western Canadian carnival
Creators: name: Angus, Fiona
Publisher: name: University of British Columbia
Year: 2009

description: Arising out of an intensive participant-observation research project in which the researcher travelled with a Western Canadian carnival for several months in 1996, working and living as a carnival employee, this ethnographic study1 of workers in the carnival explores the intersection of gender, race, and social class that provides a work force who willingly undertake jobs that are characterized by hardship and exploitation. The subjective understandings of the workers towards their work and living conditions underscore the salience of gender (particularly protest masculinity) and social class (lower tier of the working class) and illuminate the finding that, far from seeing themselves as oppressed, the workers celebrate their work and the physical toll that it takes on their bodies. The carnival is male-dominated, and the social construction of masculinity combines with the heavy physical demands of most of the carnival jobs to produce a work environment with conditions that defy common-sense understandings of safety and endurance, but which the male workers, through their adherence to masculinist ideals of strength and heroism, use to express their glorification of heavy, physical labour. The research also demonstrates how racialization processes outside the carnival predispose male Aboriginal and Metis workers to seek and find employment in the carnival, and that, despite the dominance of White owners and workers, no evidence of discriminatory labour or social practices was located within the carnival culture itself. Also examined is the issue of mental labour in a working-class environment, not from the traditional standpoint found in most academic discussions of the mental-manual oppositional dichotomy, but from the perspective of the practitioners themselves in the carnival's games, where the use of interpersonal skills is critical to their financial and social success. Despite the relatively few women in the carnival, their presence serves to validate one of the key tenets of protest masculinity — the norm of heterosexuality. Most of the young women in the carnival practice "emphasized femininity", a kind of femininity constructed in relation to masculinity, and designed to attract the eyes and bodies of men. This thesis examines some key concepts in protest masculinity and emphasized femininity, such as violence, mental and manual labour, and social activities, blending in issues of gender, racialization and social class, to add to the growing literature on working class cultures.
Spin oscillations of neutrinos scattered off a rotating black hole
Creators: name: Dvornikov, Maxim
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Spin oscillations of neutrinos, gravitationally scattered off a black hole (BH), are studied. The cases of nonrotating and rotating BHs are analyzed. We derive the analytic expressions for the transition and survival probabilities of spin oscillations when neutrinos interact with these gravitational backgrounds. The obtained transition probabilities depend on the impact parameter, as well as the neutrino energy and the particle mass. We find that there is a possibility of spin oscillations of ultrarelativistic neutrinos scattering off a rotating BH. Then, considering the neutrino scattering off BH surrounded by background matter, we derive the effective Schrodinger equation for spin oscillations. The numerical solution of this equation is obtained in the case of a supermassive BH with a realistic accretion disk. Spin effects turn out to be negligible in the neutrino scattering in the Schwarzschild metric. In the Kerr metric, we find that the observed neutrino fluxes can be reduced almost 10% because of spin oscillations when ultrarelativistic neutrinos experience gravitational scattering. The neutrino interaction with an accretion disk results in the additional modification of the intensities of outgoing neutrino fluxes. We consider the applications of the obtained results for the neutrino astronomy.
description: 22 pages, 20 eps figures, LaTeX2e, published version. arXiv admin note: substantial text overlap with arXiv:1911.08317
การวิเคราะห์ฉากตื่นเต้นสำคัญในนวนิยายสยองขวัญของจินตวีร์ วิวัธน์
Creators: name: กองบรรณาธิการ
Publisher: name: คณะศิลปศาสตร์ มหาวิทยาลัยธรรมศาสตร์
Year: 2008
Subjects: -

description: วรรณวิทัศน์, 8, พฤศจิกายน, 201-208
Density inhomogeneities in heavy ion collisions around the critical point
Creators: name: Paech, Kerstin
name: Dumitru, Adrian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the hydrodynamical expansion of a hot and baryon-dense quark fluid coupled to classical real-time evolution of the long wavelength modes of the chiral field. Significant density inhomogeneities develop dynamically when the transition to the symmetry-broken state occurs. We find that the amplitude of the density inhomogeneities is larger for expansion trajectories crossing the line of first-order transitions than for crossovers, which could provide some information on the location of a critical point. A few possible experimental signatures for inhomogeneous decoupling surfaces are mentioned briefly.
description: 6 pages, 4 figures, accepted for publication in PLB
CPA-Lasing in Thin-Elastic Plates via Exceptional Points
Creators: name: Farhat, M.
name: Chen, P. Y.
name: Guenneau, S.
name: Wu, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We present here how a coherent perfect absorber-laser (CPAL) enabled by parity-time ($\mathcal{PT}$)-symmetry breaking may be exploited to build monochromatic amplifying devices for flexural waves. The fourth order partial differential equation governing the propagation of flexural waves leads to four by four transfer matrices, and this results in physical properties of the $\mathcal{PT}$-symmetry specific to elastic plate systems. We thus demonstrate the possibility of using CPAL for such systems and we argue the possibility of using this concept to detect extremely small-scale vibration perturbations with important outcomes in surface science (imaging of nanometer vibration) and geophysics (improving seismic sensors like velocimeters). The device can also generate finite signals using very low exciting intensities. The system can alternatively be used as a perfect absorber for flexural energy by tailoring the left and right incident wave for energy harvesting applications.
description: 6 pages, 3 figures
TARAQQIYOTNING GLABALLASHUVI JARAYONIDA ISLOM  DININING KO'RINISHLARI
Creators: name: Orifov Og'abek, Toshkent axborot  texnalogiyalari universiteti  Samarqand filiali AX-23_08-gurux talabasi
Publisher: name: Zenodo
Year: 2024

description: Taqraqqiyotning glaballashuvi bosqichida barcha davlatlarning tuzgan jamiyatlari  anglab  bo’mas  darajada  rivojlanib  turli  xalqlarning  o’zaro  madaniyat aralashuvi  bilan  izohlanadi.  Ushbu  maqolada  shu  taraqqiyot  bosqichinig  eng muhim  tartbsiz  va  anglash  qiyin  bo’lgan  madaniyatlar,  an’analar,  urfodatlar,aholining  turmush  tarzi  va  turmush  sharoitining  har  xilligidagi   islom dininig  vakilari  bo’lmish  musulmonlarning  hayot  tarziga  glaballashuvni  ta’siri yoritilib  beriladi.Bugungi  jahonni    siyosiy  beqarorlik  avj  olayotgan  bir  paytda oxirgi  o’ttiz  yillik siyosat  olamining hukmronlari  o’z maqsadlari  yo’ladagi islom dining  niqob  qilib  olganliklari  va  o’z  maqsadlarining  amalga  oshishidan  hech narsadan tab tortmaganlari ma’lumdir. Islom dining niqob qilinishi deganda  siyosat sohiblari sun’iy tarzda diniy extrimizm va terrorizm guruhlarini shakllantrib Yaqin Sharq  ya’nekim  Suriya,  Iroq  va  hozirda  Falastin  hududlarida  dinniy  mojarolarni keltrib,  o’zlarining  moddiy  manfaatlarini  qondirishda  ko’plab  begunoh odamlarning hayotiga zomin bo’lishiyapti.
Magnetic anisotropy of vicinal (001) fcc Co films: role of crystal splitting and structure relaxation in step-decoration effect
Creators: name: Cinal, M.
name: Umerski, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The uniaxial in-plane magnetic anisotropy (UIP-MA) constant is calculated for a single step on the (001) surface of fcc Co($N$) films. The calculations are done for both an undecorated step and the step decorated with one or more, up to 7, Cu wires. Our objective is to explain the mechanisms by which the decoration decreases the UIP-MA constant, which is the effect observed experimentally for ultrathin Co films deposited on vicinal (001) Cu surfaces and can lead to reorientation of magnetization within the film plane. Theoretical calculations performed with a realistic tight-binding model show that the step decoration changes the UIP-MA constant significantly only if the splitting between the on-site energies of various $d$-orbitals is included for atoms located near the step edge. The local relaxation of atomic structure around the step is also shown to have a significant effect on the shift of the UIP-MA constant. The influence of these two relevant factors is analyzed further by examining individual contributions to the UIP-MA constant from atoms around the step. The magnitude of the obtained UIP-MA shift agrees well with experimental data. It is also found that an additional shift due to possible charge transfer between Cu and Co atoms is very small.
description: 12 pages,9 figures, RevTeX, submitted to Physical Review B version 3: additions to content version 2: minor corrections
INNOVATIONS IN IRRIGATION FINANCING: TAPPING DOMESTIC FINANCIAL MARKETS IN INDIA
Creators: name: Raju, K. Vengama
name: Gulati, Ashok
name: Meinzen-Dick, Ruth Suseela
name: Raju, K. Vengama
name: Gulati, Ashok
name: Meinzen-Dick, Ruth Suseela
Publisher: name: Unknown
Year: 2003
Subjects: Agricultural Finance

description: Financing for water projects, especially for irrigation, has been moving towards collapse in recent years due to declining donor and government funding. Some Indian states have undertaken innovative institutional reforms by setting up financially autonomous corporations to mobilise required funds from the domestic bond market. This analysis of the performance of one such corporation, Karnataka's Krishna Bhagya Jal Nigam Limited, indicates that although adequate funds were mobilised, and physical works are on schedule, the new institution did not attempt to enhance overall irrigation performance and to move towards financial sustainability of the irrigation project. This paper describes the background of this institution, its achievements, inadequacies and potential of the innovative efforts made in irrigation financing reforms.
[Fragment]
Creators: name: Ukjent
Publisher: name: Unknown
Year: 0

description: Korslegenden i Jacobus de Voragines Legenda aurea. Cap. LXVIII. De inventione santae crucis i Th. Graesses utg. Leipzig 1850 sidene 303-304 et stykke fra begynnelsen (ifølge brev fra Norsk Historisk Kildeskrift 3. mai 1956)
Evidence for B+ -> K0barK+ and B0 -> K0K0bar, and Measurement of the Branching Fraction and Search for Direct CP Violation in B+ -> K0pi+
Creators: name: BaBar Collaboration
name: Aubert, B.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present evidence for the b -> d penguin-dominated decays B+ -> K0barK+ and B0 -> K0K0bar with significances of 3.5 and 4.5 standard deviations, respectively. The results are based on a sample of 227 million Y(4S) -> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We measure the branching fractions Br(B+ -> K0barK+) = (1.5 +- 0.5 +- 0.1) x 10^{-6} (< 2.4 x 10^{-6}) and Br(B0 -> K0K0bar) = (1.19^{+0.40}_{-0.35} +- 0.13) x 10^{-6}, where the uncertainties are statistical and systematic, respectively, and the upper limit on the branching fraction for K0barK+ is at the 90% confidence level. We also present improved measurements of the charge-averaged branching fraction Br(B+ -> K0pi+) = (26.0 +- 1.3 +- 1.0) x 10^{-6} and CP-violating charge asymmetry A_CP(K0pi+) = -0.09 +- 0.05 +- 0.01, where the uncertainties are statistical and systematic, respectively.
description: 7 pages, 1 figure, 1 table, submitted to Physical Review Letters
DEMAND PROJECTIONS FOR POULTRY PRODUCTS AND POULTRY FEEDS IN BANGLADESH
Creators: name: Islam, Nabiul
name: Islam, Nabiul
Publisher: name: Unknown
Year: 2003
Subjects: Demand and Price Analysis
Livestock Production/Industries

description: The analysis carries out demand projections for poultry products and poultry feeds in Bangladesh over the next 20 years. Using separate rural and urban consumption data and income elasticities of demand, the national consumption of eggs is projected to be 5,866 million for 2020. The corresponding consumption of meat is projected to be 307 thousand tons. The estimated use of grains (wheat and maize) as poultry feeds ranges from 867 to 898 thousand tons for the year 2020, depending on the approach adopted. The requirement of wheat as poultry feed is only 8 per cent of the total domestic production while the requirement of maize as poultry feed is as high as nearly 8 times its domestic production.
THE SPATIAL DISTRIBUTION OF POVERTY IN VIETNAM AND THE POTENTIAL FOR TARGETING
Creators: name: Minot, Nicholas
name: Baulch, Bob
name: Minot, Nicholas
name: Baulch, Bob
Publisher: name: Unknown
Year: 2002
Subjects: Food Security and Poverty

description: This paper combines household survey and census data to construct a provincial poverty map of Vietnam and evaluate the accuracy of geographically targeted anti-poverty programs. First, the paper estimates per capita expenditure as a function of selected household and geographic characteristics using the 1998 Vietnam Living Standards Survey. Next, these results are combined with data on the same household characteristics from the 1999 Census to estimate the incidence of poverty in each province. The results indicate that rural poverty is concentrated in ten provinces in the Northern Uplands, two provinces of the central Highlands, and two provinces in the Central Coast. Finally, Receiver Operating Characteristics curves are used to evaluate the effectiveness of geographic targeting. The results show that the existing poor communes system excludes large numbers of poor people, but there is potential to sharpen poverty targeting using a small number of easy–to-measure household characteristics.
Surface acoustic wave-induced electroluminescence intensity oscillation in planar light-emitting devices
Creators: name: Cecchini, Marco
name: Piazza, Vincenzo
name: Beltram, Fabio
name: Gevaux, D. G.
name: Ward, M. B.
name: Shields, A. J.
name: Beere, H. E.
name: Ritchie, D. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Electroluminescence emission from surface acoustic wave-driven light-emitting diodes (SAWLEDs) is studied by means of time-resolved techniques. We show that the intensity of the SAW-induced electroluminescence is modulated at the SAW frequency (~1 GHz), demonstrating electron injection into the p-type region synchronous with the SAW wavefronts.
description: 4 pages, 3 figures
IMPLICATIONS OF QUALITY DETERIORATION FOR PUBLIC FOODGRAIN STOCK MANAGEMENT AND CONSUMERS IN BANGLADESH
Creators: name: Dorosh, Paul A.
name: Farid, Naser
name: Dorosh, Paul A.
name: Farid, Naser
Publisher: name: Unknown
Year: 2003
Subjects: Food Consumption/Nutrition/Food Safety

description: In the late 1990s, government policy in Bangladesh shifted in favor of increased public foodgrain stocks, setting official minimum stock targets of 1.0 to 1.2 million tons, as compared to operational targets of about 700 to 800 thousand metric tons in the early 1990s. Because no mechanism for stock rotation involving simultaneous buying and selling grain at a wholesale level exists, higher stock levels with no increase in distribution led to an increase in average age of stocks and problems of stock quality deterioration. This paper extends earlier analyses of stock policy by focusing on a key aspect of stock management in Bangladesh: the economic costs of stock quality deterioration in storage, including the implicit costs to recipients of Public Food Distribution System (PFDS) foodgrain. Using market prices to value procurement and distribution of rice and wheat, consumer and producer subsidies accounted for 57.4 and 20.9 percent, respectively, of net outlay in 2000/01. Implicit losses to rice consumers due to quality deterioration were significant in 2000/01: about 1.05 billion Taka (about 19 million dollars), equal to 10.9 percent of total net outlay on rice of the PFDS. Analysis of the costs and benefits of alternative stock targets based on calculations of the minimum age of stock on a monthly basis indicates that moderate increases in the size of stock (e.g. 200 thousand tons), lead to only small net marginal outlays. However, unless procurement and distribution are also raised, the age and quality of the stock for distribution deteriorates, resulting in significant losses to program recipients.
Elastic Properties and Magnetic Phase Diagrams of Dense Kondo Compound Ce0.75La0.25B6
Creators: name: Suzuki, Osamu
name: Nakamura, Shintaro
name: Akatsu, Mitsuhiro
name: Nemoto, Yuichi
name: Goto, Terutaka
name: Kunii, Satoru
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have investigated the elastic properties of the cubic dense Kondo compound Ce0.75La0.25B6 by means of ultrasonic measurements. We have obtained magnetic fields vs temperatures (H-T) phase diagrams under magnetic fields along the crystallographic [001], [110] and [111] axes. An ordered phase IV showing the elastic softening of c44 locates in low temperature region between 1.6 and 1.1 K below 0.7 T in all field directions. The phase IV shows an isotropic nature with regard to the field directions, while the antiferro-magnetic phase III shows an anisotropic character. A remarkable softening of c44 and a spontaneous trigonal distortion εyz+εzx+εxy recently reported by Akatsu et al. [J. Phys. Soc. Jpn. 72 (2003) 205] in the phase IV favor a ferro-quadrupole (FQ) moment of Oyz+Ozx+Oxy induced by an octupole ordering.
description: 9 figures, Strongly Correlated Electrons
DYNAMICS OF AGRICULTURAL WAGE AND RICE PRICE IN BANGLADESH: A RE-EXAMINATION
Creators: name: Rashid, Shahidur
name: Rashid, Shahidur
Publisher: name: Unknown
Year: 2002
Subjects: Crop Production/Industries
Labor and Human Capital

description: Like many other Asian countries, the causal relationship between agricultural productivity and the incidence of rural poverty has been a widely debated subject in Bangladesh. A number of studies argued that the real agricultural wage rate was declining during the period when the country had experienced overall agricultural growth. This paper contributes to this debate in two ways: i) it reexamines the methodological aspects of past studies and presents alternative estimates; and ii) analyzes dynamics of agricultural wage and rice price using the most recent data. Multivariate co-integration techniques are used to examine the long and short-run relationships among agricultural wage rate, rice price, urban wage rate, and other prices. The results show that agricultural wage and rice price maintained strong co-integrating relationships during the periods 1949/50— 1979/80; and the elasticities of agricultural wage rate with respect to rice price are substantially higher than what past studies had reported. Analyses of postfamine data (1976/77—1998/99) suggest that rice price, which was strongly cointegrated with agricultural wage rate until the early 80s, is no longer a significant determinant of wage formation in Bangladesh.
Comparing antiviral strategies against COVID-19 via multiscale within-host modelling
Creators: name: Fatehi, Farzad
name: Bingham, Richard J
name: Dykeman, Eric C
name: Stockley, Peter G
name: Twarock, Reidun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Within-host models of COVID-19 infection dynamics enable the merits of different forms of antiviral therapy to be assessed in individual patients. A stochastic agent-based model of COVID-19 intracellular dynamics is introduced here, that incorporates essential steps of the viral life cycle targeted by treatment options. Integration of model predictions with an intercellular ODE model of within-host infection dynamics, fitted to patient data, generates a generic profile of disease progression in patients that have recovered in the absence of treatment. This is contrasted with the profiles obtained after variation of model parameters pertinent to the immune response, such as effector cell and antibody proliferation rates, mimicking disease progression in immunocompromised patients. These profiles are then compared with disease progression in the presence of antiviral and convalescent plasma therapy against COVID-19 infections. The model reveals that using both therapies in combination can be very effective in reducing the length of infection, but these synergistic effects decline with a delayed treatment start. Conversely, early treatment with either therapy alone can actually increase the duration of infection, with infectious virions still present after the decline of other markers of infection. This suggests that usage of these treatments should remain carefully controlled in a clinical environment.
description: Published version by Royal Society Open Science
Discovery of 10 pulsars in an Arecibo drift-scan survey
Creators: name: Lorimer, D. R.
name: Xilouris, K. M.
name: Fruchter, A. S.
name: Stairs, I. H.
name: Camilo, F.
name: Vazquez, A. M.
name: Eder, J. A.
name: McLaughlin, M. A.
name: Roberts, M. S. E.
name: Hessels, J. W. T.
name: Ransom, S. M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a 430-MHz survey for pulsars conducted during the upgrade to the 305-m Arecibo radio telescope. Our survey covered a total of 1147 square degrees of sky using a drift-scan technique. We detected 33 pulsars, 10 of which were not known prior to the survey observations. The highlight of the new discoveries is PSR J0407+1607, which has a spin period of 25.7 ms, a characteristic age of 1.5 Gyr and is in a 1.8-yr orbit about a low-mass (>0.2 Msun) companion. The long orbital period and small eccentricity (e = 0.0009) make the binary system an important new addition to the ensemble of binary pulsars suitable to test for violations of the strong equivalence principle. We also report on our initially unsuccessful attempts to detect optically the companion to J0407+1607 which imply that its absolute visual magnitude is > 12.1. If, as expected on evolutionary grounds, the companion is an He white dwarf, our non-detection imples a cooling age of least 1 Gyr.
description: 8 pages, 3 figures, accepted for publication in MNRAS
Whims of an Accreting Young Brown Dwarf: Exploring Emission Line Variability of 2MASSW J1207334-393254
Creators: name: Scholz, Alexander
name: Jayawardhana, Ray
name: Brandeker, Alexis
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the first comprehensive study of emission line variability in an accreting young brown dwarf. We have collected 14 high-resolution optical spectra of 2MASSW J1207334-393254 (M8), a likely member of the nearby 8-million-year-old TW Hydrae association. These spectra show a variety of emission lines that are commonly seen in classical T Tauri stars. Halpha line in particular shows dramatic changes in shape and intensity in our dataset, both on timescales of several weeks and several hours. In spectra from late-January, the line is relatively weak and only slightly asymmetric. Spectra from mid- and late-March show intense, broad and asymmetric Halpha emission, indicative of on-going disk accretion. We estimate that the accretion rate could have changed by a factor of 5-10 over ~6 weeks in this brown dwarf. March spectra also reveal significant `quasi-periodic' changes in the Halpha line profile over the course of a night, from clearly double-peaked to nearly symmetric. These nightly profile changes, roughly consistent with the brown dwarf's rotation period, could be the result of a redshifted absorption feature coming into and out of our line of sight; when the profile is double-peaked we may be looking into an accretion column, flowing from the inner disk edge on to the central object, indicating that the accretion is probably channelled along the magnetic field lines. Our findings provide strong support for the magnetospheric accretion scenario, and thus for the existence of large-scale magnetic fields, in the sub-stellar regime (abridged).
description: 12 pages, 2 figures, ApJL, accepted
[Fragment]
Creators: name: Ukjent
Publisher: name: Unknown
Year: 0

description: Legendarium? Oktober-november. (De sancto Dionisio) Calixto papa Leonardo Luca ev. Crisanto. (I følge Norsk Hist. Kjeldeskrift av 9. mai 1956 er dette et fragment av Jacobus de Voragines Legenda aurea, cap. CLIII-CLVII, s. 680-700 i Th. Grasses utg.
Decomposing Excess Commuting: A Monte Carlo Simulation Approach
Creators: name: Hu, Yujie
name: Wang, Fahui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computers and Society (cs.CY)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Excess or wasteful commuting is measured as the proportion of actual commute that is over minimum (optimal) commute when assuming that people could freely swap their homes and jobs in a city. Studies usually rely on survey data to define actual commute, and measure the optimal commute at an aggregate zonal level by linear programming (LP). Travel time from a survey could include reporting errors and respondents might not be representative of the areas they reside; and the derived optimal commute at an aggregate areal level is also subject to the zonal effect. Both may bias the estimate of excess commuting. Based on the 2006-2010 Census for Transportation Planning Package (CTPP) data in Baton Rouge, Louisiana, this research uses a Monte Carlo approach to simulate individual resident workers and individual jobs within census tracts, estimate commute distance and time from journey-to-work trips, and define the optimal commute based on simulated individual locations. Findings indicate that both reporting errors and the use of aggregate zonal data contribute to miscalculation of excess commuting.
Susy for non-Hermitian Hamiltonians, with a view to coherent states
Creators: name: Bagarello, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an extended version of supersymmetric quantum mechanics which can be useful if the Hamiltonian of the physical system under investigation is not Hermitian. The method is based on the use of two, in general different, superpotentials. Bi-coherent states of the Gazeau-Klauder type are constructed and their properties are analyzed. Some examples are also discussed, including an application to the Black-Scholes equation, one of the most important equations in Finance.
description: In press in Mathematical Physics, Analysis and Geometry
A novel route to lower the dielectric loss in CaCu$_{3}$Ti$_{4}$O$_{12}$ ceramics
Creators: name: Feng, Lixin
name: Tang, Xiaoming
name: Yan, Yueyue
name: Chen, Xuezhi
name: Jiao, Zhengkuan
name: Cao, Guanghan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based upon a widely-accepted internal-barrier-layer-capacitance (IBLC) model, the dielectric loss in the giant-dielectric-constant CaCu$_{3}$Ti$_{4}$O$_{12}$ (CCTO) material is expected to decrease as the conductivity of the CCTO grains/subgrains increases. In this letter, we report that this idea was successfully realized through the La-for-Ca substitution in the CCTO ceramics. The impedance spectroscopy analysis gives the evidence.
description: Submitted to APL
A comprehensive range of X-ray ionized reflection models
Creators: name: Ross, R. R.
name: Fabian, A. C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: X-ray ionized reflection occurs when a surface is irradiated with X-rays so intense that its ionization state is determined by the ionization parameter xi propto F/n, where F is the incident flux and n the gas density. It occurs in accretion, onto compact objects including black holes in both active galaxies and stellar-mass binaries, and possibly in gamma-ray bursts. Computation of model reflection spectra is often time-consuming. Here we present the results from a comprehensive grid of models computed with our code, which has now been extended to include what we consider to be all energetically-important ionization states and transitions. This grid is being made available as an ionized-reflection model, REFLION, for XSPEC.
description: 6 pages, 8 Figures, accepted for publication in MNRAS
Time efficiency analysis for undersampled quantitative MRI acquisitions
Creators: name: Byanju, Riwaj
name: Klein, Stefan
name: Cristobal-Huerta, Alexandra
name: Hernandez-Tamames, J. A.
name: Poot, Dirk H. J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: To realize Quantitative MRI (QMRI) with clinically acceptable scan time, acceleration factors achieved by conventional parallel imaging techniques are often inadequate. Further acceleration is possible using model-based reconstruction. We propose a theoretical metric called TEUSQA: Time Efficiency for UnderSampled QMRI Acquisitions to inform sequence design and sample pattern optimisation. TEUSQA is designed for a particular class of reconstruction techniques that directly estimate tissue parameters, possibly using prior information to regularize the estimation. TEUSQA can be used to evaluate undersampling patterns for multi-contrast QMRI sequences targeting any tissue parameter. To verify the time efficiency predicted by TEUSQA, we performed Monte Carlo simulations and an accelerated parameter mapping with two sequences (Inversion prepared fast spin echo for T1 and T2 mapping and 3D GRASE for T2 and B0 inhomogeneity mapping). Using TEUSQA, we assessed several ways to generate undersampling patterns in silico, providing insight into the relation between sample distribution and time efficiency for different acceleration factors. The time efficiency predicted by TEUSQA was within 15 % of that observed in the Monte Carlo simulations and the prospective acquisition experiment. The assessment of undersampling patterns showed that a class of good patterns could be obtained by low-discrepancy sampling. We believe that TEUSQA offers a valuable instrument for developers of novel QMRI sequences pushing the boundaries of acceleration to achieve clinically feasible protocols. Finally, we applied a time-efficient undersampling pattern selected using TEUSQA for a 32-fold accelerated scan to map T1 and T2 mapping of a healthy volunteer.
[Letter from Emily Carr to Ruth Humphrey]
Creators: name: Carr, Emily, 1871-1945
Publisher: name: The University of British Columbia
Year: 2015

description: Letter to Ruth Humphrey from Emily Carr, undated - 2 pp., cover. Dated by R.H. late Aug. or early Sept. Cover dated with comment by R.H.: "1943 - late Aug (or early Sept, before opening of primary Schools *for Gillian*) Also dated by ref. to the Exhibition's of E.C.'s paintings (See *Emily Carr: Her Paintings and Sketches* - *Oxford university Press, 1945) *though the dates given in this publication has been sharply criticized ".
Definition of Complexity Factor for Self-Gravitating Systems in Palatini $f(R)$ Gravity
Creators: name: Yousaf, Z.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The aim of this paper is to explore the complexity factor (CF) for those self-gravitating relativistic spheres whose evolution proceeds non-dynamically. We are adopting the definition of CF mentioned in \cite{PhysRevD.97.044010}, modifying it to the static spherically symmetric case, within the framework of a modified gravity theory (the Palatini $f(R)$ theory). In this respect, we have considered radial dependent anisotropic matter content coupled with spherical geometry and determined the complexity factor involved in the patterns of radial evolution. We shall explore the field and a well-known Tolman-Oppenheimer-Volkoff equations. After introducing structure scalars from the orthogonal decomposition of the Riemann tensor, we shall calculate complexity factor. An exact analytical model is presented by considering firstly ansatz provided by Gokhroo and Mehra. The role of matter variables and $f(R)$ terms are analyzed in the structure formation as well as their evolution through a complexity factor.
description: 20 pages, 0 figures, version published in Physica Scripta
Symplectic forms and surfaces of negative square
Creators: name: Li, Tian-Jun
name: Usher, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D05

description: We introduce an analogue of the inflation technique of Lalonde-McDuff, allowing us to obtain new symplectic forms from symplectic surfaces of negative self-intersection in symplectic four-manifolds. We consider the implications of this construction for the symplectic cones of Kähler surfaces, proving along the way a result which can be used to simplify the intersections of distinct pseudoholomorphic curves via a perturbation.
description: 17 pages. To appear in Journal of Symplectic Geometry
Simple spin models with non-concave entropies
Creators: name: Touchette, Hugo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Two simple spin models are studied to show that the microcanonical entropy can be a non-concave function of the energy, and that the microcanonical and canonical ensembles can give non-equivalent descriptions of the same system in the thermodynamic limit. The two models are simple variations of the classical paramagnetic spin model of non-interacting spins and are solved as easily as the latter model.
description: v1: 11 pages, 5 figures. v2: Short, published version of v1, 6 pages, 3 figures. See v1 for the solutions of some of the problems listed in v2
BOAO Photometric Survey of Galactic Open Clusters. III. Czernik 24 and Czernik 27
Creators: name: Kim, Sang Chul
name: Park, Hong Soo
name: Sohn, Sangmo Tony
name: Lee, Myung Gyoon
name: Park, Byeong-Gon
name: Sung, Hwankyung
name: Ann, Hong Bae
name: Chun, Moo-Young
name: Kim, Seung-Lee
name: Jeon, Young-Beom
name: Yuk, In-Soo
name: Lee, Sang Hyun
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present BV CCD photometry for the open clusters Czernik 24 and Czernik 27. These clusters have never been studied before, and we provide, for the first time, the cluster parameters; reddening, distance, metallicity and age. Czernik 24 is an old open cluster with age 1.8 +/- 0.2 Gyr, metallicity [Fe/H]=-0.41 +/- 0.15 dex, distance modulus (m-M)_0 = 13.1 +/- 0.3 mag (d=4.1 +/- 0.5 kpc), and reddening E(B-V) = 0.54 +/- 0.12 mag. The parameters for Czernik 27 are estimated to be age = 0.63 +/- 0.07 Gyr, [Fe/H]= -0.02 +/- 0.10 dex, (m-M)_0 = 13.8 +/- 0.2 mag (d=5.8 +/- 0.5 kpc), and E(B-V) = 0.15 +/- 0.05 mag. The metallicity and distance values for Czernik 24 are consistent with the relation between the metallicity and the Galactocentric distance of other old open clusters. We find the metallicity gradient of 51 old open clusters including Czernik 24 to be Delta [Fe/H]/Delta R_gc= -0.064 +/- 0.009 dex/kpc.
description: Accepted by the Journal of the Korean Astronomical Society, 2005 December issue
The role of low spatial-frequencies in lexical decision and word naming : a masked priming study
Creators: name: Boden, Catherine
Publisher: name: University of British Columbia
Year: 2009

description: Does word reading depend more on high or low spatial-frequency information? Although word recognition is often thought by lay people to be a fine detail task, alternative perspectives have been proposed in which the low spatial-frequency information contained in the global word form is processed more quickly than the details. Low spatial-frequencies may merely facilitate word recognition or may be sufficient for a rapid lexical decision (Is that a word?). The premise that low spatial-frequencies are sufficient for facilitating and/or making lexical decisions was examined in the present study. Letter strings were filtered with 3 types of spatial-frequency filter (low pass, high-pass, medium spatial-frequency notch) and unfiltered control. Proficient readers made lexical decisions under unprimed and masked primed conditions. In the unprimed condition, a filtered target was presented for 105 or 400 ms followed, after a 30 ms interstimulus interval (ISI), by a pattern mask. In the masked priming condition, a forward mask was presented for 150 ms, followed 30 ms later by the filtered prime, which was then followed by an unfiltered target after a 30 ms ISI. Naming and lexical decision tasks were completed for the masked priming condition. Sensitivity (d') in the unprimed condition was lowest for the low-pass targets at both ISIs. Both low- and high-pass filtered words (< 3.5 cpd and > 4.6 cpd respectively) produced significant priming effects in the lexical decision task. Low-pass words, however, were not sufficient to facilitate a naming response. In contrast, high-pass words were sufficient to prime a naming response. The data do not support a unique role for low spatial-frequencies in either making a rapid lexical decision or in facilitating lexical decision or naming. The data do suggest that the medium and high spatial-frequencies may be important to lexical decision and naming.
Enumeration of non-positive planar trivalent graphs
Creators: name: Westbury, Bruce W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05A15, 17B10

description: In this paper we construct inverse bijections between two sequences of finite sets. One sequence is defined by planar diagrams and the other by lattice walks. G. Kuperberg has shown that the number of elements in these two sets are equal. This problem and the methods we use are motivated by the representation theory of the exceptional simple Lie algebra $G_2$. However in this account we have emphasised the combinatorics.
On $τ$-tilting finiteness of the Schur algebra
Creators: name: Wang, Qi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We determined the $τ$-tilting finiteness of Schur algebras over an algebraically closed field of arbitrary characteristic, except for a few small cases.
description: 32 pages, final version, published by Journal of Pure and Applied Algebra
Additional file 1 of Insulin resistance, diabetic kidney disease, and all-cause mortality in individuals with type 2 diabetes: a prospective cohort study
Creators: name: Penno, Giuseppe
name: Solini, Anna
name: Orsi, Emanuela
name: Bonora, Enzo
name: Fondelli, Cecilia
name: Trevisan, Roberto
name: Vedovato, Monica
name: Cavalot, Franco
name: Zerbini, Gianpaolo
name: Lamacchia, Olga
name: Nicolucci, Antonio
name: Pugliese, Giuseppe
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Marine Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: Additional file 1: Figure S1. Scatterplot of clamp-derived GDR and eGDR (A) or HOMA-IR (B) in 140 individuals with T2D.
Dielectric resonances of ordered passive arrays
Creators: name: Schäfer, Steffen
name: Raymond, Laurent
name: Albinet, Gilbert
Publisher: name: arXiv
Year: 2005
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The electrical and optical properties of ordered passive arrays, constituted of inductive and capacitive components, are usually deduced from Kirchhoff's rules. Under the assumption of periodic boundary conditions, comparable results may be obtained via an approach employing transfer matrices. In particular, resonances in the dielectric spectrum are demonstrated to occur if all eigenvalues of the transfer matrix of the entire array are unity. The latter condition, which is shown to be equivalent to the habitual definition of a resonance in impedance for an array between electrodes, allows for a convenient and accurate determination of the resonance frequencies, and may thus be used as a tool for the design of materials with a specific dielectric response. For the opposite case of linear arrays in a large network, where periodic boundary condition do not apply, several asymptotic properties are derived. Throughout the article, the derived analytic results are compared to numerical models, based on either Exact Numerical Renormalisation or the spectral method.
description: 12 pages, 12 figures
The $θ$-term, CP$^{N-1}$ Model and the Inversion Approach in the Imaginary $θ$ Method
Creators: name: Imachi, Masahiro
name: Kambayashi, Hitoshi
name: Shinno, Yasuhiko
name: Yoneyama, Hiroshi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The weak coupling region of CP$^{N-1}$ lattice field theory with the $θ$-term is investigated. Both the usual real theta method and the imaginary theta method are studied. The latter was first proposed by Bhanot and David. Azcoiti et al. proposed an inversion approach based on the imaginary theta method. The role of the inversion approach is investigated in this paper. A wide range of values of $h=-{\rm Im} θ$ is studied, where $θ$ denotes the magnitude of the topological term. Step-like behavior in the $x$-$h$ relation (where $x=Q/V$, $Q$ is the topological charge, and $V$ is the two dimensional volume) is found in the weak coupling region. The physical meaning of the position of the step-like behavior is discussed. The inversion approach is applied to weak coupling regions.
description: PTPTEX, 17 pages with 13 figures. Some sentences were corrected
First analysis of anisotropic flow with Lee--Yang zeroes
Creators: name: Bastid, N.
name: Ollitrault, ; J. -Y.
name: Borghini, N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report on the first analysis of directed and elliptic flow with the new method of Lee--Yang zeroes. Experimental data are presented for Ru+Ru reactions at 1.69 AGeV measured with the FOPI detector at SIS/GSI. The results obtained with several methods, based on the event-plane reconstruction, on Lee--Yang zeroes, and on multi-particle cumulants (up to 5th order) applied for the first time at SIS energies, are compared. They show conclusive evidence that azimuthal correlations between nucleons and composite particles at this energy are largely dominated by anisotropic flow.
description: 5 pages, 3 figures, submitted to Phys. Rev. C Rapid Com
New Analytic Solutions for Galaxy Evolution II: Wind Recycling, Galactic Fountains and Late-Type Galaxies
Creators: name: Lapi, A.
name: Pantoni, L.
name: Boco, L.
name: Danese, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We generalize the analytic solutions presented in Pantoni et al. (2019) by including a simple yet effective description of wind recycling and galactic fountains, with the aim of self-consistently investigating the spatially-averaged time evolution of the gas, stellar, metal, and dust content in disc-dominated late-type galaxies (LTGs). Our analytic solutions, when supplemented with specific prescriptions for parameter setting and with halo accretion rates from $N-$body simulations, can be exploited to reproduce the main statistical relationships followed by local LTGs; these involve, as a function of the stellar mass, the star formation efficiency, the gas mass fraction, the gas/stellar metallicity, the dust mass, the star formation rate, the specific angular momentum, and the overall mass/metal budget. Our analytic solutions allow to easily disentangle the diverse role of the main physical processes ruling galaxy formation in LTGs; in particular, we highlight the crucial relevance of wind recycling and galactic fountains in efficiently refurnishing the gas mass, extending the star-formation timescale, and boosting the metal enrichment in gas and stars. All in all, our analytic solutions constitute a transparent, handy, and fast tool that can provide a basis for improving the (subgrid) physical recipes presently implemented in more sophisticated semi-analytic models and numerical simulations, and can offer a benchmark for interpreting and forecasting current and future spatially-averaged observations of local and higher redshift LTGs.
description: 33 pages, 15 figures. Accepted by ApJ. arXiv admin note: substantial text overlap with arXiv:1906.07458