cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Individual differences, mood and coping : a process analysis of daily chronic pain
Creators: name: Newth, Sarah Jane
Publisher: name: University of British Columbia
Year: 2009

description: This study addresses recent calls in the literature to explore both general trends and individual differences in the process of coping and associated health outcomes as they unfold across time (Parker & Endler, 1996; Tennen & Affleck, 1996; Tennen, Affleck, Armeli & Carney, 2000). Twice daily for one week, 71 individuals coping with RA pain reported on their pain severity, coping efforts, and negative mood via a structured diary. Each of the Big Five personality dimensions (i.e., neuroticism, extraversion, openness to experience, agreeableness, and conscientiousness) and disease status information were measured via questionnaire. Using these two sources of data (i.e., time variant and time invariant data) both idiographic and nomothetic patterns in the associations among daily negative mood, coping and pain were examined. Temporal associations among these variables within the unfolding of a single day were tested via Hierarchical Linear Modeling (HLM; Bryk & Raudenbush, 1992), a statistical technique recommended for use with multi-level data collected across time. First, the tested models examined the temporal associations between mood and pain within days. Second, the moderating role of coping efforts, personality and disease status was examined. Third, the moderating role of personality and disease status in both coping use and coping effectiveness was explored. The findings from this study suggest fluctuations in negative mood and ways of coping have an impact upon how subjective pain experience unfolds within the course of a single day. The findings also suggest that these temporal associations are at times moderated by both contextual and person factors.
Scalar potential for the gauged Heisenberg algebra and a non-polynomial antisymmetric tensor theory
Creators: name: D'Auria, Riccardo
name: Ferrara, Sergio
name: Trigiante, Mario
name: Vaula, Silvia
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study some issues related to the effective theory of Calabi-Yau compactifications with fluxes in Type II theories. At first the scalar potential for a generic electric abelian gauging of the Heisenberg algebra, underlying all possible gaugings of RR isometries, is presented and shown to exhibit, in some circumstances, a "dual'' no-scale structure under the interchange of hypermultiplets and vector multiplets. Subsequently a new setting of such theories, when all RR scalars are dualized into antisymmetric tensors, is discussed. This formulation falls in the class of non-polynomial tensor theories considered long ago by Freedman and Townsend and it may be relevant for the introduction of both electric and magnetic charges.
description: 11 pages LaTex
BloodChain: A Blood Donation Network Managed by Blockchain Technologies
Creators: name: Le, Hai Trieu
name: Nguyen, Tran Thanh Lam
name: Nguyen, Tuan Anh
name: Ha, Xuan Son
name: Duong-Trung, Nghia
Publisher: name: Technische Universität Berlin
Year: 2022
Subjects: subject: 004 Datenverarbeitung; Informatik
subject: blood donation network
subject: blockchain
subject: Hyperledger Fabric
subject: blood quality
subject: information visibility

description: Due to the rapid change of population structure, leading to lower birth rates and quick aging rates, the demand for blood supply is increasing significantly. In most countries, blood quality and origin are managed by blood management information systems, such as national authorities. Nevertheless, the traditional system has limitations in this field, such as a lack of detailed blood information, making it challenging to manage blood quality, supply, and demand. Hence, to solve these issues, this paper proposes a blockchain-based system called BloodChain, an improved system to support blood information management, providing more detailed information about blood, such as blood consumption and disposal. BloodChain exploits private blockchain techniques with a limited number of relatively fast and reliable participants, making them suitable for B2B (Business to Business) transactions. In this paper, we also develop a proposed system based on the architecture of Hyperledger Fabric. The evaluation of BloodChain is performed in several scenarios to prove our proposed model’s effectiveness.
Radiation Pressure Supported Starburst Disks and AGN Fueling
Creators: name: Thompson, Todd A.
name: Quataert, Eliot
name: Murray, Norm
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider the structure of marginally Toomre-stable starburst disks under the assumption that radiation pressure on dust grains provides the dominant vertical support against gravity. This is particularly appropriate when the disk is optically thick to its own IR radiation, as in the central regions of ULIRGs. Because the disk radiates at its Eddington limit, the Schmidt-law for star formation changes in the optically-thick limit, with the star formation rate per unit area scaling as Sigma_g/kappa, where Sigma_g is the gas surface density and kappa is the mean opacity. We show that optically thick starburst disks have a characteristic flux and dust effective temperature of F ~ 10^{13} L_sun/kpc^2 and T_eff ~ 90K, respectively. We compare our predictions with observations and find good agreement. We extend our model from many-hundred parsec scales to sub-parsec scales and address the problem of fueling AGN. We assume that angular momentum transport proceeds via global torques rather than a local viscosity. We account for the radial depletion of gas due to star formation and find a strong bifurcation between two classes of disk models: (1) solutions with a starburst on large scales that consumes all of the gas with little fueling of a central AGN and (2) models with an outer large-scale starburst accompanied by a more compact starburst on 1-10 pc scales and a bright central AGN. The luminosity of the latter models is in many cases dominated by the AGN. We show that the vertical thickness of the starburst disk on pc scales can approach h ~ r, perhaps accounting for the nuclear obscuration in some Type 2 AGN. We also argue that the disk of young stars in the Galactic Center may be the remnant of such a compact nuclear starburst.
description: 26 pages, 9 figures, emulateapj, accepted to ApJ, minor changes, discussion tightened, references added
Random errors are not necessarily politically neutral
Creators: name: Blom, Michelle
name: Conway, Andrew
name: Stuckey, Peter J.
name: Teague, Vanessa
name: Vukcevic, Damjan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Errors are inevitable in the implementation of any complex process. Here we examine the effect of random errors on Single Transferable Vote (STV) elections, a common approach to deciding multi-seat elections. It is usually expected that random errors should have nearly equal effects on all candidates, and thus be fair. We find to the contrary that random errors can introduce systematic bias into election results. This is because, even if the errors are random, votes for different candidates occur in different patterns that are affected differently by random errors. In the STV context, the most important effect of random errors is to invalidate the ballot. This removes far more votes for those candidates whose supporters tend to list a lot of preferences, because their ballots are much more likely to be invalidated by random error. Different validity rules for different voting styles mean that errors are much more likely to penalise some types of votes than others. For close elections this systematic bias can change the result of the election.
Decentralized Collaboration of Open Source Software Development
Creators: name: Feng, Chi
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: Economics

description: This dissertation contains three essays on the study of open source software collaboration. The first essay, titled “Overview of Open Source Software Development”, highlights the link between developer incentives under the non-monetary setting and the sustainability issue in the open source community. Motivated by the well-known fatalflaw Heartbleed in the widely used open source network security framework OpenSSL, Chapter 1 discusses the lack of manpower in the open source community from theperspective of developer incentives. I introduce the empirical setting of this project, GitHub, one the most popular open source development platforms. Both the past literatureas well as the social network features on GitHub suggest that the motivations to contribute to open source projects could include (but not limited to) ego stratification,reputation, and career concern. The second Chapter, “An Empirical Case Study of Open Source Software Community”, provides descriptive statistics of the contribution history data for Python projects from GitHub, and establishes several empirical patterns of open source contribution to showcase the lack of manpower in the community. I find that the distribution of contribution of a project follows power law, in the sense that most projects have very few contributors and number of commits while very few projects have a large number of contributors and commits. In addition, the number of new contributors ofa project is positively correlated with its current number of authors and watchers at first, then negatively correlated. For the number of commits, the opposite holds true. In the last Chapter, titled “A Structural Model of Decentralized Open Source Software Development”, I build a dynamic discrete choice model characterizing individual developer choice problem in order to understand the sustainability issue in the open source community. Using finite-dependence (Arcidiacono and Miller, 2011, 2019b,a), 1 I identify and estimate the parameters of an individual developer’s utility function. The estimation results show that developers prefer to contribute to popular projects. At the same time, they prefer their own contribution to not be “diluted” by theirpeers. This is the first study, to the extent of my knowledge, to build and estimate a structural model to build a direct link between developer preferences and the choice of open source contribution. Lastly, given the estimated structural parameters, I conduct counterfactual analysis by increasing the expected popularity of projects except for new projects. The results show that the number of contributors choosing not to commit would decrease under the counterfactual regime.
"IRRATIONAL" PLANTING BEHAVIOR AS RATIONAL EXPECTATIONS OF GOVERNMENT SUPPORT
Creators: name: Vedenov, Dmitry V.
name: Vedenov, Dmitry V.
Publisher: name: Unknown
Year: 2003
Subjects: Production Economics

description: The paper outlines an approach to estimation of rational expectations acreage response model for US soybeans that explicitly takes into account government payments. Numerical methods are used to recompute the model equilibrium at each iteration of the log-likelihood optimization routine. Estimation results allow one to measure market distortion introduced by the government support programs.
Event Clustering & Event Series Characterization on Expected Frequency
Creators: name: Albrecht, Conrad M
name: Freitag, Marcus
name: van Kessel, Theodore G
name: Lu, Siyuan
name: Hamann, Hendrik F
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Data Structures and Algorithms (cs.DS)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We present an efficient clustering algorithm applicable to one-dimensional data such as e.g. a series of timestamps. Given an expected frequency $ΔT^{-1}$, we introduce an $\mathcal{O}(N)$-efficient method of characterizing $N$ events represented by an ordered series of timestamps $t_1,t_2,\dots,t_N$. In practice, the method proves useful to e.g. identify time intervals of "missing" data or to locate "isolated events". Moreover, we define measures to quantify a series of events by varying $ΔT$ to e.g. determine the quality of an Internet of Things service.
Majority-Vote Model on a Random Lattice
Creators: name: Lima, F. W. S.
name: Fulco, U. L.
name: Filho, R. N. Costa
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The stationary critical properties of the isotropic majority vote model on random lattices with quenched connectivity disorder are calculated by using Monte Carlo simulations and finite size analysis. The critical exponents $γ$ and $β$ are found to be different from those of the Ising and majority vote on the square lattice model and the critical noise parameter is found to be $q_{c}=0.117\pm0.005$.
description: 4 pages, 6 figures
Effects of infection with Anguillicola crassus and simultaneous exposure with Cd and 3,3′,4,4′,5-pentachlorobiphenyl (PCB 126) on the levels of cortisol and glucose in European eel (Anguilla anguilla)
Creators: name: Sures, B.
name: Lutz, I.
name: Kloas, W.
Publisher: name: Humboldt-Universität zu Berlin
Year: 2005
Subjects: subject: stress response
subject: cortisol
subject: glucose
subject: Anguillicola crassus
subject: Anguilla anguilla
subject: parasites as stressors
subject: PCB
subject: Cd
subject: 610 Medizin und Gesundheit
subject: 570 Biowissenschaften; Biologie

description: To investigate whether the stress response of European eels infected with Anguillicola crassus is influenced by environmental pollutants, experimentally infected eels were exposed to Cd and/or to 3,3′, 4,4′, 5-pentachlorobiphenyl (PCB 126). Serum cortisol and glucose concentrations of these eels were monitored over a period of 103 days and were compared with data from infected, unexposed eels as well as with data from uninfected eels. Additionally, the levels of cortisol were correlated with concentrations of Anguillicola-specific antibodies. All eels showed an initial increase of the cortisol levels until day 63. This general elevation of plasma cortisol is most likely due to handling stress, as all eels were repeatedly netted and afterwards inoculated with a feeding tube. At the end of the exposure period eels which were infected and those which were infected and simultaneously exposed to Cd and PCB showed significantly higher levels than the controls. The general course of serum glucose levels in eels resembled that of cortisol. Accordingly, Spearman correlation analysis revealed that an increase in serum cortisol concentrations is correlated with rising levels of glucose. With respect to immune-endocrine interactions a significant negative correlation between cortisol and anti-A. crassus antibodies was found. Our data show that A. crassus is the most potent stressor for European eels among the treatments tested within this study. This is important in terms of ecotoxicological studies as the main effects are caused by parasites rather than chemicals. Accordingly, effects of parasites on the physiological homeostasis of organisms must be considered in ecotoxicology. From the parasitological point of view our results suggest that probably as part of an unbalanced host-parasite interaction A. crassus evokes a strong cortisol response in A. anguilla, thereby suppressing the immune response which in turn enables the parasite to establish. The parasite-induced stress response in the newly adopted European eel might be one of the factors which contributes to the extremely effective colonizing strategy of A. crassus.
بازآفرینی معماری و بافتهای قدیمی تهران در طراحی شهری
Creators: name: Kheiri, Ali
name: Najafi, Ronak
Publisher: name: figshare
Year: 2020
Subjects: subject: 120102 Architectural Heritage and Conservation
subject: FOS: Civil engineering
subject: 120103 Architectural History and Theory
subject: 120104 Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)

description: با تغییر شکل شهرها و روند رشد شهر در چند دهه اخیر و از بین رفتن دروازه‌ها و گسترش شدید شهر به سمت شمال تهران و تمایل مردم به حرکت به آن سمت و مهاجرت اقشار مختلف از برخی مناطق تاریخی با ارزش قدیمی، به مناطق جدید و ورود مهاجران از شهرهای دیگر و ارزش پیدا کردن زمین به عنوان سرمایه، با توجه به ساخت و سازهایی که در مناطق دیگر صورت گرفته، ارزش مناطقی از شهرها کاسته شده و نیز برخی مناطق با ورود افرادی که برای آن منطقه ارزشی قائل نیستند، کم کم در حال تبدیل شدن به قسمت‌های فراموش شده شهر گردیده است. نیاز به بازآفرینی معماری و نیاکانان ما در بعضی نقاط شهر به شدت حائز اهمیت است و هویت کالبدی مکان می‌تواند متاثر از این کار باشد. اصول بازآفرینی نیاز به حضور و مشارکت حداکثری در شهر و بافت‌های تاریخی است که مشارکت مردم باعث احیا شدن هسته‌های اولیه محلات و در نتیجه شهر می شود.
Ornithomimus velox Marsh 1890
Creators: name: Kenneth Carpenter
name: D. Bruce Young
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Dinosauria
Ornithomimidae
Ornithomimus
Ornithomimus velox

description: Suborder THEROPODA   Family ORNITHOMIMIDAE
  Omithomimus velox
 Figure 6
 Material. — YPM 542 cotype left distal end of tibia, metatarsals II-IV, phalanges I-1-3, YPM 548 cotype metacarpals I—III (Denver Formation, Loc. 35); DMNH 33300 manus claw (Denver Formation, Loc. 19); UCM 3539 phalanx (Denver Formation; Loc. 27); UCM 47633 distal caudal (Denver Formation, Loc. 27); and USGS D902 manus claw (Denver Formation?; Loc. 15).
 Description and discussion. —The type material was briefly described by Marsh (1890; see also 1896a, 1896 b), with additional comments about the taxon by Osborn (1916), Russell (1972), and DeCourten and Russell (1985). As a whole, the limb material is proportionally more gracile than other ornithomimids such as Garudimimus or even Struthiomimus. Additional specimens, primarily unguals, have been found elsewhere in the Denver Basin, but only from the Denver Formation. DMNH 33300 is a nearly complete ungual, 40 mm long.
description: Published as part of Kenneth Carpenter & D. Bruce Young, 2002, Late Cretaceous dinosaurs from the Denver Basin, Colorado, pp. 237-254 in Rocky Mountain Geology 37 on page 244, DOI: 10.2113/gsrocky.37.2.237, http://zenodo.org/record/3943081
Configurable heralded two-photon Fock-states on a chip
Creators: name: Hua, Xin
name: Lunghi, Tommaso
name: Doutre, Florent
name: Vergyris, Panagiotis
name: Sauder, Grégory
name: Charlier, Pierrick
name: Labonté, Laurent
name: D'Auria, Virginia
name: Martin, Anthony
name: Tascu, Sorin
name: De Micheli, Marc P.
name: Tanzilli, Sébastien
name: Alibart, Olivier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Progress in integrated photonics enables combining several elementary functions on single substrates for realizing advanced functionnalized chips. We report a monolithic integrated quantum photonic realization on lithium niobate, where nonlinear optics and electro-optics properties have been harnessed simultaneously for generating heralded configurable, two-photon states. Taking advantage of a picosecond pump laser and telecom components, we demonstrate the production of various path-coded heralded two-photon states, showing 94\% raw visibility for Hong-Ou-Mandel interference. The versatility and performance of such a highly integrated photonic entanglement source enable exploring more complex quantum information processing protocols finding application in communication, metrology and processing tasks.
PRICE DISCOVERY IN THE FUTURES AND CASH MARKET FOR SUGAR
Creators: name: Armstrong, Delroy
name: Zapata, Hector O.
name: Fortenbery, T. Randall
name: Armstrong, Delroy
name: Zapata, Hector O.
name: Fortenbery, T. Randall
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Pricing function using world sugar futures (WSF) has received limited research interest. Findings indicate that WSF and cash prices for the Dominican Republic appears cointegrated with changing relationships. Previous work suggests that futures markets price the cheapest quality of commodities deliverable on contracts. Cointegration results are consistent with this argument.
A search for top decay into tau, neutrino and quark in top-antitop production
Creators: name: The CDF Collaboration
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a search for top-antitop events with a tau lepton in the final state. The data sample corresponds to an integrated luminosity of 194/pb collected with the CDF II detector from proton-antiproton collisions at a center of mass energy of 1.96 TeV. We observe two events with an expected signal of 1.0+/-0.2 events and a background of 1.3+/-0.3 events. We determine a 95% confidence level upper limit on r_tau, the ratio of the measured rate of top->tau nu quark to the expectation, of 5.2.
description: 7 pages, 1 figure, published version
Dromaeosaurus Matthew & Brown 1922
Creators: name: Kenneth Carpenter
name: D. Bruce Young
Publisher: name: Zenodo
Year: 2002
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Reptilia
Dinosauria
Dromaeosauridae
Dromaeosaurus

description: Material.— DMNH 34594 tooth (Denver Formation, Loc. 17); DMNH 44386 tooth (Denver Formation, Loc. 20); UCM 38743 tooth (Laramie Formation, Loc. 4); UCM 38754 tooth (Laramie Formation, Loc. 4); UCM 38755 tooth (Laramie Formation, Loc. 4); UCM 42323 tooth (Laramie Formation, Loc. 1); UCM 42324 tooth (Laramie, Loc. 1); and UCM 68917 tooth (Denver Formation, Loc. 34).
 Description and discussion. — Small theropod teeth are tentatively referred to Dromaeosaurus based on their overall size, shape, and denticle pattern (where preserved).
description: Published as part of Kenneth Carpenter & D. Bruce Young, 2002, Late Cretaceous dinosaurs from the Denver Basin, Colorado, pp. 237-254 in Rocky Mountain Geology 37 on page 244, DOI: 10.2113/gsrocky.37.2.237, http://zenodo.org/record/3943081
Multi-scale Deep Neural Network (MscaleDNN) for Solving Poisson-Boltzmann Equation in Complex Domains
Creators: name: Liu, Ziqi
name: Cai, Wei
name: Xu, Zhi-Qin John
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: In this paper, we propose multi-scale deep neural networks (MscaleDNNs) using the idea of radial scaling in frequency domain and activation functions with compact support. The radial scaling converts the problem of approximation of high frequency contents of PDEs' solutions to a problem of learning about lower frequency functions, and the compact support activation functions facilitate the separation of frequency contents of the target function to be approximated by corresponding DNNs. As a result, the MscaleDNNs achieve fast uniform convergence over multiple scales. The proposed MscaleDNNs are shown to be superior to traditional fully connected DNNs and be an effective mesh-less numerical method for Poisson-Boltzmann equations with ample frequency contents over complex and singular domains.
FACTORS INFLUENCING THE IMPLEMENTATION OF BEST MANAGEMENT PRACTICES IN THE DAIRY INDUSTRY
Creators: name: Rahelizatovo, Noro C.
name: Gillespie, Jeffrey M.
name: Rahelizatovo, Noro C.
name: Gillespie, Jeffrey M.
Publisher: name: Unknown
Year: 2002

description: Best management practices (BMPs) consist of conservation methods promoted to reduce water pollution from agricultural activities. This study investigates the likely determinants of Louisiana dairy producers' decisions to voluntarily implement BMPs. Farm size, milk productivity, frequency of meetings with LCES, and risk aversion significantly influenced the increased adoption of BMPs.
Environmental Impact of Bundling Transport Deliveries Using SUMO: Analysis of a cooperative approach in Austria
Creators: name: Validi, Aso
name: Polasek, Nicole
name: Alabi, Leonie
name: Leitner, Michael
name: Olaverri-Monreal, Cristina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: Urban Traffic is recognized as one of the major CO2 contributors that puts a high burden on the environment. Different attempts have been made for reducing the impacts ranging from traffic management actions to shared-vehicle concepts to simply reducing the number of vehicles on the streets. By relying on cooperative approaches between different logistics companies, such as sharing and pooling resources for bundling deliveries in the same zone, an increased environmental benefit can be attained. To quantify this benefit we compare the CO2 emissions, fuel consumption and total delivery time resulting from deliveries performed by one cargo truck with two trailers versus by two single-trailer cargo trucks under real conditions in a simulation scenario in the city of Linz in Austria. Results showed a fuel consumption and CO2 emissions reduction of 28% and 34% respectively in the scenario in which resources were bundled in one single truck.
description: 5 pages, 7 figures, 2 tables, paper accepted for the proceedings of the CISTI'2020 - 15th Iberian Conference on Information Systems and Technologies
INTEGRAL observations of V0332+53 in outburst
Creators: name: Kreykenbohm, I.
name: Mowlavi, N.
name: Produit, N.
name: Soldi, S.
name: Walter, R.
name: Dubath, P.
name: Lubinski, P.
name: Tuerler, M.
name: Coburn, W.
name: Santangelo, A.
name: Rothschild, R. E.
name: Staubert, R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the analysis of a 100ksec Integral(3-100kev) observation of the transient X-ray pulsar V0332+53 inoutburst. The source is pulsating at P=4.3751+/-0.0002s with a clear double pulse from 6 kev to 60 kev. The average flux was ~550mCrab between 20 kev and 60 kev. We modeled the broad band continuum from 5 kev to 100 kev with a power-law modified by an exponential cut off. We observe three cyclotron lines: the fundamental line at 24.9+/-0.1 kev, the first harmonic at 50.5+/-0.1 kev as well as the second harmonic at71.7+/-0.8 kev, thus confirming the discovery of the harmonic lines by Coburn et al. (2005) in RXTE data.
description: 4 pages, 3 figures. Accepted for publication in A&A Letters
Development of twist in an emerging magnetic flux tube by poloidal field accretion
Creators: name: Chatterjee, P.
name: Choudhuri, A. R.
name: Petrovay, K.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Following an earlier proposal by Choudhuri (2003) for the origin of twist in the magnetic fields of solar active regions, we model the penetration of a wrapped up background poloidal field into a toroidal magnetic flux tube rising through the solar convective zone. The rise of the straight, cylindrical flux tube is followed by numerically solving the induction equation in a comoving Lagrangian frame, while an external poloidal magnetic field is assumed to be radially advected onto the tube with a speed corresponding to the rise velocity. One prediction of our model is the existence of a ring of reverse current helicity on the periphery of active regions. On the other hand, the amplitude of the resulting twist depends sensitively on the assumed structure (diffuse vs. concentrated/intermittent) of the active region magnetic field right before its emergence, and on the assumed vertical profile of the poloidal field. Nevertheless, in the model with the most plausible choice of assumptions a mean twist comparable to the observations can result rather naturally. Our results indicate that the contribution of this mechanism to the twist can be quite significant, and under favourable circumstances it can potentially account for most of the current helicity observed in active regions.
description: 9 pages, 7 figures. A&A, in press
Enhancing urban resilience to extreme weather: the roles of residents’ transition paths among multiple transportation modes
Creators: name: Qiao, Mengling
name: Haraguchi, Masahiko
name: Lall, Upmanu
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401302
subject: Geospatial information systems and geospatial data modelling

description: Abstract: Understanding how residents adjust mobility patterns in extreme weather is crucial for urban resilience. Existing studies often overlook the transitions between different transportation modes. This study develops a framework that measures the spatiotemporal anomalies of mobilities and builds transition paths across multiple modes to reveal how residents adapt to extreme weather. Analyzing four extreme rainfall events in New York City, we find that Citibike riders are most sensitive to rainfall. In the absence of subway disruptions, they tend to switch to the subway. When the subway system is paralyzed, indicating flooding of the system by heavy rainfall, riders shift to For-Hire Vehicles, followed by taxis. Both demonstrate the value of flexible service in urban resilience. The paralysis-prone subway and the uneven distribution of flexible service indicate that the current transit infrastructure lacks coordination and is unprepared for climate change. Recommendations for enhancing urban resilience include upgrading and maintaining the subway system; enhancing inter-transportation-modal coordination; introducing amphibious transportation modes; improving pre-disaster awareness of inland residents; encouraging safety shared ride; and connecting affordable transition paths for underprivileged groups.
Die Idiomela der byzantinische Karfreitagshoren in syrischer Überlieferung
Creators: name: Baumstark, Anton
Publisher: name: Oriens christianus : Hefte für die Kunde des christlichen Orients
Year: 2024

description: Oriens christianus : Hefte für die Kunde des christlichen Orients, Bd. 25 Nr. 2 (1928): Oriens christianus, Band 25/26, Heft 2
Thermodynamics of R-charged Black Holes in AdS(5) From Effective Strings
Creators: name: Gubser, Steven S.
name: Heckman, Jonathan J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that the thermodynamics of certain near-extremal black holes in asymptotically flat space can be lifted to an effective string description created from the intersection of D-branes. In this paper we present evidence that the semiclassical thermodynamics of near-extremal R-charged black holes in AdS(5)xS(5) is described in a similar manner by effective strings created from the intersection of giant gravitons on the S(5). We also present a free fermion description of the supersymmetric limit of the one-charge black hole, and we give a crude catalog of the microstates of the two and three-charge black holes in terms of operators in the dual conformal field theory.
description: v2: references and typos corrected, 24 pages, latex2e
UNDERGRADUATE CURRICULA IN AGRIBUSINESS AND AGRICULTURAL ECONOMICS: WHAT'S THE DIFFERENCE?
Creators: name: Harris, Harold M.
name: Miller, Stephen E.
name: Wells, Gary J.
name: Harris, Harold M.
name: Miller, Stephen E.
name: Wells, Gary J.
Publisher: name: Unknown
Year: 2003
Subjects: Teaching/Communication/Extension/Profession

description: We summarize undergraduate agribusiness and agricultural economics curricula for 112 US institutions. Relative to agricultural economics majors, agribusiness majors on average take fewer courses in math, economics, and general agricultural economics; and more courses in agribusiness, general business, and general agriculture.
Efficient Transport Logistics, An Approach for Urban Freight Transport in Austria
Creators: name: Brandstätter, Verena
name: Olaverri-Monreal, Cristina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: To alleviate traffic congestion that results from the growth of e-commerce we propose an approach in the city of Linz, Austria by relying on shared distribution centers from different companies. We develop two algorithms to find out the optimal location for the hubs and calculate the shortest path between locations. Results showed that in an urban environment, the implementation of hubs results in a reduction of the number of delivery vehicles. It reduces driving distances from hub to the customers, and also benefits the drivers that need to return home every day.
description: 6 pages, 5 figures, 2 Tables, accepted for publication in the proceedings of the CISTI'2020 - 15th Iberian Conference on Information Systems and Technologies
On regular and chaotic dynamics of a non-${\cal{PT}}$-symmetric Hamiltonian system of a coupled Duffing oscillator with balanced loss and gain
Creators: name: Ghosh, Pijush K.
name: Roy, Puspendu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A non-${\cal{PT}}$-symmetric Hamiltonian system of a Duffing oscillator coupled to an anti-damped oscillator with a variable angular frequency is shown to admit periodic solutions. The result implies that ${\cal{PT}}$-symmetry of a Hamiltonian system with balanced loss and gain is not necessary in order to admit periodic solutions. The Hamiltonian describes a multistable dynamical system - three out of five equilibrium points are stable. The dynamics of the model is investigated in detail by using perturbative as well as numerical methods and shown to admit periodic solutions in some regions in the space of parameters. The phase transition from periodic to unbounded solution is to be understood without any reference to ${\cal{PT}}$-symmetry. The numerical analysis reveals chaotic behaviour in the system beyond a critical value of the parameter that couples the Duffing oscillator to the anti-damped harmonic oscillator, thereby providing the first example of Hamiltonian chaos in a system with balanced loss and gain. The method of multiple time-scales is used for investigating the system perturbatively. The dynamics of the amplitude in the leading order of the perturbation is governed by an effective dimer model with balanced loss and gain that is non-${\cal{PT}}$-symmetric Hamiltonian system. The dimer model is solved exactly by using the Stokes variables and shown to admit periodic solutions in some regions of the parameter space.
description: 27 pages, 7 multi-panel figures, Added discussions, References and typos fixed, version to appear in Journal of Physics A: Mathematical and Theoretical
EXTENSION EDUCATORS' SUPPLY OF RISK MANAGEMENT TRAINING TO FARMERS
Creators: name: Vergara, Oscar
name: Martin, Steven W.
name: Coble, Keith H.
name: Knight, Thomas O.
name: Patrick, George F.
name: Baquet, Alan E.
name: Vergara, Oscar
name: Martin, Steven W.
name: Coble, Keith H.
name: Knight, Thomas O.
name: Patrick, George F.
name: Baquet, Alan E.
Publisher: name: Unknown
Year: 2003
Subjects: Teaching/Communication/Extension/Profession

description: A univariate Tobit model of extension educators' provision of risk management educational training was conducted in Mississippi, Texas, Indiana, and Nebraska. A complementary relationship exists between percent of time devoted to agricultural responsibilities and the provision of risk management training courses. The results indicate that, as extension educators perceive farmers to be more knowledgeable of risk management tools, their provision of risk management education decreases. On the other hand, the provision of risk management courses increase as extension educators perceive themselves as being more knowledgeable on the use of risk management tools.
Linearized Israel Matching Conditions for Cosmological Perturbations in a Moving Brane Background
Creators: name: Bucher, Martin
name: Carvalho, Carla
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: With a view toward the problem of computing the linearized cosmological perturbations in Randall-Sundrum cosmological models where a Z2 symmetry has been imposed about a boundary brane, we derive the form of the linearized Israel matching conditions and the auxiliary gauge conditions on the boundary when Lorentz gauge has been imposed in the bulk. This gauge is completely covariant and local, manifestly respecting all the AdS5 symmetries in the bulk and not relying on a decomposition into pure scalar, vector, and tensor sectors, which is necessarily nonlocal. We demonstrate that the auxiliary gauge conditions on the boundary ensure that bulk gravitons upon reflection off the brane do not emit polarizations that violate the bulk Lorentz gauge condition. We also characterize the residual gauge freedom, embodied by five longitudinal (pure gauge) graviton polarizations in the bulk, four of which correspond to reparameterizations of the induced brane metric and one of which corresponds to normal displacements of the brane.
description: 35 pages, RevTeX, with two eps figures
Transport in one dimensional Coulomb gases: From ion channels to nanopores
Creators: name: Kamenev, A.
name: Zhang, J.
name: Larkin, A. I.
name: Shklovskii, B. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We consider a class of systems where, due to the large mismatch of dielectric constants, the Coulomb interaction is approximately one-dimensional. Examples include ion channels in lipid membranes and water filled nanopores in silicon or cellulose acetate films. Charge transport across such systems possesses the activation behavior associated with the large electrostatic self-energy of a charge placed inside the channel. We show here that the activation barrier exhibits non-trivial dependence on the salt concentration in the surrounding water solution and on the length and radius of the channel.
description: New references are have been added and discussed. 18 pages, 8 figures
Gauge fixing for the simulation of black hole spacetimes
Creators: name: Schnetter, Erik
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: I consider the initial-boundary-value-problem of nonlinear general relativistic vacuum spacetimes, which today cannot yet be evolved numerically in a satisfactory manner. Specifically, I look at gauge conditions, classifying them into gauge evolution conditions and gauge fixing conditions. In this terminology, a gauge fixing condition is a condition that removes all gauge degrees of freedom from a system, whereas a gauge evolution condition determines only the time evolution of the gauge condition, while the gauge condition itself remains unspecified. I find that most of today's gauge conditions are only gauge evolution conditions. I present a system of evolution equations containing a gauge fixing condition, and describe an efficient numerical implementation using constrained evolution. I examine the numerical behaviour of this system for several test problems, such as linear gravitational waves or nonlinear gauge waves. I find that the system is robustly stable and second-order convergent. I then apply it to more realistic configurations, such as Brill waves or single black holes, where the system is also stable and accurate.
description: 93 pages, 82 figures; also available from TOBIAS-lib, http://w210.ub.uni-tuebingen.de/dbt/volltexte/2003/819/
Persistence of three bisphenols and other trace organics of concern in anaerobic sludge under methanogenic conditions
Creators: name: Choi, Youn Jeong
name: Nies, Loring F.
name: Lee, Linda S.
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: 60506 Virology

description: The degradation and distribution of bisphenol A (BPA), bisphenol S (BPS) and bisphenol AF (BPAF) were evaluated in dilute anaerobic sludge slurries amended with a single bisphenol or a mixture of all three and maintained under methanogenic conditions over a 28-d period. No significant degradation of the bisphenols was observed in methane-generating microcosms. Rapid sorption to sludge particles was the primary removal process with sorption observed: BPAF > BPA > BPS. Several other trace organic chemicals of concern in the sludge were detected using quadrupole time of flight mass spectrometry. Of those detected, triclosan and triclocarban had sufficiently high intensities to quantify changes over the 28-d period in the bisphenol-amended microcosms. Similar to the bisphenols, triclosan and triclocarban concentrations also did not significantly change over the 28-d period with concentrations quantified at 2021 ± 627 and 1864 ± 769 μg/kg dry weight, respectively. Findings exemplify that methane-generating microcosms do not appear conducive to significant degradation of trace organics of concern in anaerobic sludge digesters.
Polar modified dendritic post-cross-linked polymer for Cu2+ adsorption
Creators: name: Xiaomi Yuan
name: Zhou, Fa
name: Long, Fang
name: Ruilin Man
name: Jianhan Huang
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Neuroscience
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: The polar modified dendritic post-cross-linked polymer, namely HCPD was synthesized and used for adsorptive removal of Cu2+ from aqueous solution. The results showed that 5.12 mmol/g of amino and 2.25 mmol/g of carbonyl groups were uploaded on the polymer and these groups were significantly beneficial for Cu2+ removal. The maximum capacity reached 157.8 mg/g at 313 K and increased as the temperature increased. The Langmuir model characterized the equilibrium data well and a chemical interaction was involved with the enthalpy change of 49.50 kJ/mol. The pseudo-second-order kinetic model described the kinetic data well and the intra-particle diffusion model was appropriate for characterizing the kinetic adsorption. HCPD could be easily regenerated and the regenerated polymers were effectively recycled for five times without significant loss of the equilibrium capacity. Moreover, Fourier-transform infrared (FT–IR) and X-ray photoelectron spectroscopy (XPS) results revealed that the chelating coordination of the amino and carbonyl groups with Cu2+ was the main driving force for the adsorption.
طراحی و بررسی مرکز بازی های دیجیتال در جهت آموزش و رشد خلاقیت نوجوانان
Creators: name: Kheiri, Ali
name: Najafi, Ronak
Publisher: name: figshare
Year: 2020
Subjects: subject: 120104 Architectural Science and Technology (incl. Acoustics, Lighting, Structure and Ecologically Sustainable Design)
subject: FOS: Civil engineering
subject: 120304 Digital and Interaction Design
subject: FOS: Arts (arts, history of arts, performing arts, music)
subject: 130306 Educational Technology and Computing
subject: FOS: Educational sciences
subject: Entertainment

description: در چند دهه ی اخیر با رشد و توسعه ی فن آوری رایانه ای و ابزارهای الکترونیکی، تجهیزات سرگرم کننده ی نوجوانان نیز به طور غیرقابل باوری دست خوش تغییر شده است، به طوری که روز به روز شاهد حضور بیشتری از این گونه ابزارهای الکترونیکی در خانواده های ایرانی و یا در موسسات تفریحی سطح جامعه هستیم. برخی از پژوهشگران با مطرح کردن بعد آموزشی و سرگرمی این بازی ها جنبه های مثبت آنها را مورد تاکید قرار داده اند، آنها معتقدند که با ورود این گونه وسائل به حیطه ی آموزش و پرورش، اثرات مثبتی برای تسهیل، تقویت و حتی جانشینی آموزگاران مطرح می گردد. چنانکه گفته می شود پارهای از بازی های رایانه ای در بالابردن رشد و پرورش ذهن نوجوانان یاری رسان خوب و در جهت شناخت زندگی و اهداف آنها می تواند مثمر ثمر باشد؛ از سویی دیگر پژوهشگرانی بر این باورند که اثرات منفی بازی های رایانه ای همچون خشونت ورزی و تقویت نقش های جنسی بسیار زیاد است. تاثیر مثبت این نوع سرگرمی بر روابط اجتماعی و تعاملات فردی و مهارت های لازم برای برقراری پیوند انسانی و نیز تبعات جسمی منفی همچون فشار خون، چاقی، سردرد، عوارض چشمی و .... در پژوهش های مختلف مورد تایید قرار گرفته است. با توجه به اثرات مثبت و منفی بازی های رایانه ای بر روند رشد نوجوانان، ضرورت توجه بیشتر متولیان امر به آموزش مناسب آن و برنامه ریزی دقیق تر در این حیطه مورد تاکید می باشد. در این مقاله هدف بررسی مرکز بازی های دیجیتال در جهت آموزش و رشد خلاقیت نوجوانان می باشد.
Results of 12 Years of Pulsar Timing at Nanshan -- I
Creators: name: Dang, S. J.
name: Yuan, J. P.
name: Manchester, R. N.
name: Li, L.
name: Wang, N.
name: Wang, J. B.
name: Hobbs, G.
name: Liu, Z. Y.
name: Kou, F. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have used the Nanshan 25-m Radio Telescope at Xinjiang Astronomical Observatory to obtain timing observations of 87 pulsars from 2002 July to 2014 March. Using the "Cholesky" timing analysis method we have determined positions and proper motions for 48 pulsars, 24 of which are improved positions compared to previously published values. We also present the first published proper motions for nine pulsars and improved proper motions for 21 pulsars using pulsar timing and position comparison method. The pulsar rotation parameters are derived and are more accurate than previously published values for 36 pulsars. Glitches are detected in three pulsars: PSRs J1722$-$3632, J1852$-$0635 and J1957+2831. For the first two, the glitches are large, with $Δν_g/ν> 10^{-6}$, and they are the first detected glitches in these pulsars. PSR J1722$-$3632 is the second oldest pulsar with large glitch. For the middle-age pulsars ($τ_c > 10^5$~yr), the calculated braking indices, $|n|$, are strongly correlated with $τ_c$ and the numbers of positive and negative values of $n$ are almost equal. For young pulsars ($τ_c < 10^5$~yr), there is no correlation between $|n|$ and $τ_c$ and most have $n>0$.
description: 21 pages, 8 figures, accepted for publication by ApJ
EXPLORING SUPPLY DYNAMICS IN COMPETITIVE MARKETS
Creators: name: Golden, Bill B.
name: Golden, Freida
name: Tsoodle, Leah J.
name: Golden, Bill B.
name: Golden, Freida
name: Tsoodle, Leah J.
Publisher: name: Unknown
Year: 2003
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Understanding the ebb and flow of competitive markets is essential for students pursuing a variety of undergraduate degrees. The objective of this study is to introduce users to interactions that occur in the supply side of competitive markets using a dynamic simulation model with curriculum materials.