cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
ИСКУССТВО ЭПОХИ ТЕМУРИДСКОГО РЕНЕССАНСА В СИСТЕМЕ МУСУЛЬМАНСКОГО ИСКУССТВА.
Creators: name: Бахриева, Шахло
Publisher: name: Zenodo
Year: 2024

description: В истории общественное развитие не всегда шло гладко, человечество пережило множество препятствий, кризисов, деградации и неудач. Но удавалось преодолевать их, возрождать материальные и культурные ценности и стремиться к новым достижениям. Эпоха расцвета, подъёма в развитии науки и искусства называется "ренессансом". В Западной Европе такое возрождение произошло между XV и XVIII веками после почти 700 лет мракобесия. В Центральной Азии первый период этого возрождения длился с IX по XII века. Масштабы, последствия и влияние на мировую цивилизацию были огромными.
Modeling bike counts in a bike-sharing system considering the effect of weather conditions
Creators: name: Ashqar, Huthaifa I.
name: Elhenawy, Mohammed
name: Rakha, Hesham A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: The paper develops a method that quantifies the effect of weather conditions on the prediction of bike station counts in the San Francisco Bay Area Bike Share System. The Random Forest technique was used to rank the predictors that were then used to develop a regression model using a guided forward step-wise regression approach. The Bayesian Information Criterion was used in the development and comparison of the various prediction models. We demonstrated that the proposed approach is promising to quantify the effect of various features on a large BSS and on each station in cases of large networks with big data. The results show that the time-of-the-day, temperature, and humidity level (which has not been studied before) are significant count predictors. It also shows that as weather variables are geographic location dependent and thus should be quantified before using them in modeling. Further, findings show that the number of available bikes at station i at time t-1 and time-of-the-day were the most significant variables in estimating the bike counts at station i.
description: Published in Case Studies on Transport Policy (Volume 7, Issue 2, June 2019, Pages 261-268)
AN ECONOMIC HISTORY OF THE FAILURE OF BROILER FUTURES
Creators: name: Hegde, S. Aaron
name: Hegde, S. Aaron
Publisher: name: Unknown
Year: 2004
Subjects: subject: Marketing
subject: FOS: Economics and business

description: Hedging with a futures market is one risk management alternative available to producers of most agricultural commodities. However, such an option is unavailable to broiler growers as there are no active broiler futures. Over the last 40 years there were three occasions during which futures were available for broilers. Each of the three markets failed to catch on and were thus removed from trading. We investigate the reasons for the failures time and time again. Using an econometric model, we find that the presence of a relatively efficient cross-hedge was a major reason the broiler futures collapsed.
description: Replaced with revised version of paper 07/27/04.
COMPUTER MODELING OF THE INNOVATIVE IRRIGATION SYSTEM OF YOUNG TREES
Creators: name: Buronovva, Umida
Publisher: name: Zenodo
Year: 2024

description: This study investigates the application of computer modeling techniques to develop and optimize an innovative irrigation system tailored for young trees. By employing advanced simulation methods, the research aims to enhance water distribution efficiency and promote the healthy growth of young trees while minimizing water usage. Through detailed analysis of irrigation system design and soil moisture management, the study offers insights into the effectiveness of innovative irrigation solutions for nurturing young trees.
Finding more than one path through a simple maze with a quantum walk
Creators: name: Hillery, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study quantum walks through chains consisting of two and three star graphs. The first star has a distinguished vertex labelled START and the last has one labelled END. There are multiple paths between these two vertices, and the object is to find these paths. We show that a quantum walk can do this with a quantum speedup.
Hadron Production and Phase Changes in Relativistic Heavy Ion Collisions
Creators: name: Letessier, Jean
name: Rafelski, Johann
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study soft hadron production in relativistic heavy ion collisions in a wide range of reaction energy, 4.8 GeV sqrt{s_NN} \ge 200 GeV, we use continuity of particle yields and statistical parameters to predict the hadron production at sqrt{s_NN}=62.4 GeV, and obtain total yields of hadrons at sqrt{s_NN}=130 GeV. We consider, in depth, the pattern we uncover within the hadronization condition, and discuss possible mechanisms associated with the identified rapid change in system properties at sqrt{s_NN ^cr}. We propose that the chemically over-saturated 2+1 flavor hadron matter system undergoes a 1st order phase transition.
description: 23 pages; a) we correct an entropy yield error which the early SHARE release contained; this changes tables and figures comprising physical properties involving entropy, the data fits are unaffected. b) we incorporated the latest strange hadron yields of NA49 and c) this version is in press in EPJA
Ergosphere and shadow of a rotating regular black hole
Creators: name: Ghosh, Sushant G.
name: Amir, Muhammed
name: Maharaj, Sunil D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The spacetime singularities in classical general relativity predicted by the celebrated singularity theorems are formed at the end of gravitational collapse. Quantum gravity is the expected theory to resolve the singularity problem, but we are now far from it. Therefore attention has shifted to models of regular black holes free from the singularities. A spherically symmetric regular toy model was obtained by Dymnikova (1992) which we demonstrate as an exact solution of Einstein's field equations coupled to nonlinear electrodynamics for a Lagrangian with parameter $b$ related to magnetic charge. We construct rotating counterpart of this solution which encompasses the Kerr black hole as a special case when charge is switched off ($b=0$). Event Horizon Telescope has released the first image of supermassive black hole M87$^*$, revealing the structure near black hole horizon. The rotating regular black hole's shadow may be useful to determine strong field regime. We investigate ergosphere and black hole shadow of rotating regular black hole to infer that their sizes are sensitive to charge $b$ and have a richer chaotic structure. In particular, rotating regular black hole possess larger size, but less distorted shadows when compared with Kerr black holes. We find one to one correspondence between ergosphere and shadow of the black hole.
description: 22 pages, 11 figures, 2 tables, accepted for publication in NPB
Molecular mechanisms behind anti SARS-CoV-2 action of lactoferrin
Creators: name: Miotto, Mattia
name: Di Rienzo, Lorenzo
name: Bò, Leonardo
name: Boffi, Alberto
name: Ruocco, Giancarlo
name: Milanetti, Edoardo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: Despite the huge effort to contain the infection, the novel SARS-CoV-2 coronavirus has rapidly become pandemics, mainly due to its extremely high human-to-human transmission capability, and a surprisingly high viral charge of symptom-less people. While the seek of a vaccine is still ongoing, promising results have been obtained with antiviral compounds. In particular, lactoferrin is found to have beneficial effects both in preventing and soothing the infection. Here, we explore the possible molecular mechanisms with which lactoferrin interferes with SARS-CoV-2 cell invasion, preventing attachment and/or entry of the virus. To this aim, we search for possible interactions lactoferrin may have with virus structural proteins and host receptors. Representing the molecular iso-electron surface of proteins in terms of 2D-Zernike descriptors, we (i) identified putative regions on the lactoferrin surface able to bind sialic acid receptors on the host cell membrane, sheltering the cell from the virus attachment; (ii) showed that no significant shape complementarity is present between lactoferrin and the ACE2 receptor, while (iii) two high complementarity regions are found on the N- and C-terminal domains of the SARS-CoV-2 spike protein, hinting at a possible competition between lactoferrin and ACE2 for the binding to the spike protein.
description: 9 pages, 4 figures
IMPACTS OF FEDERAL FARM PROGRAM PAYMENTS ON CROPLAND VALUES AND RENTAL RATES: EVIDENCE FROM COUNTY-LEVEL DATA IN SOUTH DAKOTA
Creators: name: Janssen, Larry
name: Button, Brian
name: Janssen, Larry
name: Button, Brian
Publisher: name: Unknown
Year: 2004
Subjects: Land Economics/Use

description: Farmland values, cash rental rates, and federal farm program payments steadily increased in the Northern Plains from 1991 - 2001. Econometric models are used to examine the impacts of Federal farm payments on cropland values and rental rates, statewide and regional,in South Dakota during this time period.
Cultural expressions and landscape : Semiahmoo First Nation reserve
Creators: name: Simovic, Nancy
Publisher: name: University of British Columbia
Year: 2009

description: Landscape is a medium of expression and a reflection of the beliefs of the people who inhabit it. It carries symbolic meanings that emerge from the values by which people define themselves; values grounded in culture. These symbols stem from elements of the natural environment, stories passed on through generations, or from experiences interacting with others. The indigenous peoples of Canada have a culture rich in traditional art, ceremony, and sustainable development and holistic integration of landscape. Contemporary First Nation culture draws from this past to inform the future. This phenomenon exemplifies the necessity for cultural expression in First Nation landscapes of today. The Semiahmoo First Nation in Lower Mainland British Columbia is a Coast Salish group occupying approximately 380 acres of land on the Pacific coastline. River and estuarine habitats, significant species richness and dense vegetation characterize the area and identify the primary motive for Semiahmoo traditional encampment on its shores. Changes in the past century have included colonial settlement to the region, periods of industrial and resource economies, a decrease in band population and subsequent decline in cultural practices. Current increasing recreation and development interests have created urgency for the reawakening of cultural expression in the landscape. Initial literature research about First Nations in Northwest Canada and a biophysical analysis provided introductory information, followed by community discussions which provided a deeper understanding of the people and of the place. A design vocabulary of traditional and contemporary elements was composed to guide and unify the program and spatial components of the design. The resulting design focuses on the public realm of the Reserve clearly defining Semiahmoo identity and sense of place. Land use issues were addressed and delineated public and private areas, ecological enhancements and displayed potential for growth on the site. The design respects the bicultural interface of the Reserve while providing cultural and environmental education. The First Nation value system possesses a tangible and spiritual quality; rooted in the creatures and elements of their surroundings. Expression of the Semiahmoo peoples' beliefs and values in the landscape enriches the experiential qualities of the place and reverence for its past and future.
MILK MARKETING ORDERS AND MILK SANITATION REGULATION: RE-EVAULATING MARKETING ORDERS' WELFARE EFFECTS
Creators: name: Balagtas, Joseph Valdes
name: Sumner, Daniel A.
name: Balagtas, Joseph Valdes
name: Sumner, Daniel A.
Publisher: name: Unknown
Year: 2004
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This research shows that the existing literature on milk marketing orders misses an important effect. Previous work ignores the interaction of marketing orders with milk grading regulation. We model this interaction and show that producer benefits from marketing orders have been smaller than previous work suggests, and, under some conditions, may even be negative. Additional costs of producing fluid grade milk, omitted from previous welfare analyses, reduce producer benefits from marketing orders. Estimates of the additional cost indicate that this previously unmeasured effect is a significant component of the total welfare effect of marketing orders. An econometric model is developed to explain the variation in the fluid grade share of milk across states and time as a function of marketing order policy. Regression results support the hypothesis that marketing orders have encouraged the shift towards production of fluid-grade milk.
Economic Impact of Vertical Coordination: A Multi-stage, Multi-player Analysis
Creators: name: Asirvatham, Jebaraj
name: Bhuyan, Sanjib
name: Asirvatham, Jebaraj
name: Bhuyan, Sanjib
Publisher: name: Unknown
Year: 2004
Subjects: Research Methods/ Statistical Methods

description: Using explicit theoretical models, this study analyzes the economic impact of alternative vertical coordination mechanisms in a three-stages production-marketing chain where interactions among multiples players at each stage, among players at different stages, and the price, output and welfare impact of such strategic behavior were computed. Policy implications are discussed.
Observations and Analysis of Absorption Lines including J = K Rotational Levels of CH3CN: The Envelope of Sagittarius B2(M)
Creators: name: Araki, Mitsunori
name: Takano, Shuro
name: Kuze, Nobuhiko
name: Minami, Yoshiaki
name: Oyama, Takahiro
name: Kamegai, Kazuhisa
name: Sumiyoshi, Yoshihiro
name: Tsukiyama, Koichi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Molecules in diffuse and translucent clouds experience cooling as a result of radiation and less excitation from collisions. However, a rotation around a molecular axis of acetonitrile, CH3CN, cannot be cooled by radiation, causing rotational populations to concentrate at the J = K levels. We aim to search for absorption lines of CH3CN having J = K level concentrations in diffuse and translucent clouds. The JK = 43-33 transition at 73.6 GHz was investigated toward Sgr B2(M) in the Galactic Center region and other sources, using the Nobeyama 45 m telescope. Based on the detected absorption lines toward Sgr B2(M), a radiation temperature of 2.8 +/- 0.5 K, kinetic temperature of 88 +/- 29 K, and column density of (1.35 +/- 0.14) x 10^14 cm-2 were derived for this molecule, revealing extremely concentrated J = K levels due to the lower excitation temperature and the higher kinetic temperature. The absorption lines occurred at a velocity of 64 km s-1. The results confirm that CH3CN with J = K level concentrations exists in the envelope of Sgr B2(M).
Splitting of Volterra Integral Operators with Degenerate Kernels
Creators: name: Rychkov, Vyacheslav S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: Volterra integral operators with non-sign-definite degenerate kernels $A(x,t)= \sum_{k=0}^n A_k(x,t)$, $A_k(x,t)= a_k (x) t^k$, are studied acting from one weighted $L_2$ space on $(0,+\infty)$ to another. Imposing an integral doubling condition on one of the weights, it is shown that the operator with the kernel $A(x,t)$ is bounded if and only $n+1$ operators with kernels $A_k(x,t)$ are all bounded. We apply this result to describe spaces of pointwise multipliers in weighted Sobolev spaces on $(0,+\infty)$.
description: 21 pages
Quantum Teleportation with a 3-Bell-state Analyzer
Creators: name: van Houwelingen, J. A. W.
name: Brunner, N.
name: Beveratos, A.
name: Zbinden, H.
name: Gisin, N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a novel Bell-state analyzer for time-bin qubits allowing the detection of three out of four Bell-states with linear optics, only two detectors and no auxiliary photons. The theoretical success rate of this scheme is 50%. A teleportation experiment was performed to demonstrate its functionality. We also present a teleportation experiment with a fidelity larger than the cloning limit.
description: 4 pages, 6 figures
Neptune's Migration into a Stirred-Up Kuiper Belt: A Detailed Comparison of Simulations to Observations
Creators: name: Hahn, Joseph M.
name: Malhotra, Renu
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Nbody simulations are used to examine the consequences of Neptune's outward migration into the Kuiper Belt, with the simulated endstates being compared rigorously and quantitatively to the observations. These simulations confirm the findings of Chiang et al. (2003), who showed that Neptune's migration into a previously stirred-up Kuiper Belt can account for the Kuiper Belt Objects (KBOs) known to librate at Neptune's 5:2 resonance. We also find that capture is possible at many other weak, high-order mean motion resonances, such as the 11:6, 13:7, 13:6, 9:4, 7:3, 12:5, 8:3, 3:1, 7:2, and the 4:1. The more distant of these resonances, such as the 9:4, 7:3, 5:2, and the 3:1, can also capture particles in stable, eccentric orbits beyond 50 AU, in the region of phase space conventionally known as the Scattered Disk. Indeed, 90% of the simulated particles that persist over the age of the Solar System in the so-called Scattered Disk zone never had a close encounter with Neptune, but instead were promoted into these eccentric orbits by Neptune's resonances during the migration epoch. This indicates that the observed Scattered Disk might not be so scattered. This model also produced only a handful of Centaurs, all of which originated at Neptune's mean motion resonances in the Kuiper Belt. We also report estimates of the abundances and masses of the Belt's various subpopulations (e.g., the resonant KBOs, the Main Belt, and the so-called Scattered Disk), and also provide upper limits on the abundance of Centaurs and Neptune's Trojans, as well as upper limits on the sizes and abundances of hypothetical KBOs that might inhabit the a>50 AU zone.
description: 60 pages, 16 figures. Accepted for publication in the Astronomical Journal
The Determinants of Self-Employment in Mexico and Household Transitions between 2002 and 2005
Creators: name: Yaqi Niu
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: subject: 140211 Labour Economics
subject: FOS: Economics and business
subject: 140302 Econometric and Statistical Methods

description: The study of self-employment has been an intriguing factor in many developing countries. However, not many empirical studies analyze self-employment on a household level. This research focuses on Mexico in 2002 and 2005 and investigates the determinants of self-employment, transitions between self-employment and the labor market, and these transitions across asset levels all from the household perspective. The results show that high school education, asset level, previous self- employment experience and household size are important determinants of self-employment. The transition between self-employment and labor market is not homogenous across asset levels, because higher asset level increases chances of self-employment. Lastly, self-employment status decreases income, suggesting that a self-employed household will earn higher income if it were to enter the labor market.
Merger Retrospective: Examining the Kimberly-Clark and Scott Paper Company Merger
Creators: name: Deychman, Alisa
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: subject: 140209 Industry Economics and Industrial Organisation
subject: FOS: Economics and business
subject: 140219 Welfare Economics

description: This study conducts a post-merger retrospective of the Kimberly-Clark and Scott Paper merger in 1995 to examine the impact on store prices and consumer welfare. Kimberly-Clark was a premium brand with strong market power in the United States. Scott Paper had the largest market share of tissues in Europe and was positioned as a value-oriented brand. This merger created the second largest personal care company in the United States. While the federal government conducts many simulations ex-ante, few analyses are run ex-post the merger. These are crucial to calibrate economic models and deliver accurate regulation. This study examined data from University of Chicago’s Booth School of Business using Dominick’s database, which surveyed over 100 of its chain stores in the Chicago area over a nine year period using weekly sales data of over 3,500 products. Regressions showed that despite the strong individual positions of the two companies, there were no anti-trust issues. After the merger, industry market prices rose by $0.49 or 2.8% in the Chicago area. This is within the 5% benchmark used by the Department of Justice to allow mergers to proceed.
Permittivity measurements of biological samples by an open-ended coaxial line
Creators: name: Bobowski, J. S.
name: Johnson, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Applied Physics (physics.app-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We previously reported on the complex permittivity and dc conductivity of waste-activated sludge. The measurements, spanning a frequency range of 3 MHz to 40 GHz, were made using an open-ended coaxial transmission line. Although this technique is well established in the literature, we found that it was necessary to combine methods from several papers to use the open-ended coaxial probe to reliably characterize biological samples having a high dc conductivity. Here, we provide a set of detailed and practical guidelines that can be used to determine the permittivity and conductivity of biological samples over a broad frequency range. Due to the electrode polarization effect, low frequency measurements of conducting samples require corrections to extract the intrinsic electrical properties. We describe one practical correction scheme and verify its reliability using a control sample.
description: 28 pages, 10 figures
THE ROLE OF ENVIRONMENTAL REGULATION ON CONCENTRATIONS OF U.S. LIVESTOCK SECTORS
Creators: name: Isik, Murat
name: Isik, Murat
Publisher: name: Unknown
Year: 2004
Subjects: Environmental Economics and Policy
Livestock Production/Industries

description: The industrialization of U.S. beef, dairy, hog, and poultry sectors has received considerable attention. There have been regional shifts in the geographical location of livestock inventories and livestock farms. This paper examines the trends in geographical concentrations of livestock sectors in the U.S., and determines whether the environmental regulations have impacted the geographical concentrations. It uses an entropy-based geographical concentration measure to determine the extent of concentrations of beef, dairy, hog, and poultry inventories and farms. The results show that livestock productions on a national level and within states are becoming more geographically concentrated. The geographical concentration of livestock sectors is negatively related to the stringency of state environmental regulations.
Giant magnetic anisotropy energy and long coherence time of uranium substitution on defected Al2O3(0001)
Creators: name: Li, Jie
name: Gu, Lei
name: Wu, Ruqian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Nanomagnets with giant magnetic anisotropy energy and long coherence time are desired for various technological innovations such as quantum information procession and storage. Based on the first-principles calculations and model analyses, we demonstrate that a single uranium atom substituting Al on the Al2O3(0001) surface may have high structural stability and large magnetic anisotropy energy up to 48 meV per uranium atom. As the magnetization resides in the localized f-shell and is not much involved in chemical bonding with neighbors, long coherence time up to ~1.6 mS can be achieved for the quantum spin states. These results suggest a new strategy for the search of ultrasmall magnetic units for diverse applications in the quantum information era.
Patenting an Industry: Tracking Semiconductor Investors in Silicon Valley and Beyond
Creators: name: Wai, Sebastian
Publisher: name: Carnegie Mellon University
Year: 2020
Subjects: subject: 140211 Labour Economics
subject: FOS: Economics and business
subject: 140302 Econometric and Statistical Methods

description: This paper uses newly collected patent and biographical data to identify and profile semiconductor inventors and track their backgrounds. This data are used to study the famous cluster of semiconductor firms in Silicon Valley and make comparisons to firms in other regions. Logistic regressions are used to estimate probabilities that firms hire inventors from a given background, dependent on characteristics of the firm. These logit models test whether Silicon Valley firms behave differently than other firms outside the region in terms of inventor hiring and assess claims made about Silicon Valley by other authors.
Astrometry and Relativity
Creators: name: Sigismondi, Costantino
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: General relativistic effects in astrophyiscal systems have been detected thanks to accurate astrometric measurements. We outline some keystones of astrometry such as stellar aberration (argument development during the years 1727-1872); Mercury's perihelion precession (1845-1916); solar disk oblateness (1966-2001); relativistic light deflection (1916-1919); lunar geodetic precession (1916-1988); Lense-Thirring and Pugh-Schiff precessions (1917-1959), finally presenting the issue of the quest for a guide star for GP-B satellite (1974-2004) as application of all previous topics.
description: 14 pages, 13 figures, 5 tables. In publication in Nuovo Cimento B
Westin, Gunnar, Der Weg der freien christlichen Gemeinden durch die Jahrhunderte
Creators: name: Krüger
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 6 Nr. 2 (1957): Ökumenische Rundschau, Band 6, Heft 2
ВНЕДРЕНИЕ ЕДИНОЙ СИСТЕМЫ АВТОРИЗАЦИИ В ОБРАЗОВАТЕЛЬНУЮ ЭКОСИСТЕМУ: ИНТЕГРАЦИЯ И БЕЗОПАСНОСТЬ
Creators: name: Сайидов, Фарух
name: Саитов, Шукрулло
name: Пирманов, Охунжон
name: Носиров, Хуршед
Publisher: name: Zenodo
Year: 2024

description: Статья посвящена разработке и внедрению единой системы авторизации в образовательную экосистему, что включает в себя создание безопасного и удобного доступа к различным образовательным ресурсам для студентов, преподавателей и административного персонала. Основное внимание уделяется обеспечению безопасности данных, упрощению процесса взаимодействия между различными платформами и сервисами, а также рассматриваются вызовы и решения, связанные с интеграцией такой системы. Это направлено на повышение эффективности управления образовательными процессами и улучшение пользовательского опыта.
Two-fluid behavior of the Kondo lattice in the 1/N slave boson approach
Creators: name: Barzykin, Victor
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: It has been recently shown by Nakatsuji, Pines, and Fisk [S. Nakatsuji, D. Pines, and Z. Fisk, Phys. Rev. Lett. 92, 016401 (2004)] from the phenomenological analysis of experiments in Ce1-xLaxCoIn5 and CeIrIn5 that thermodynamic and transport properties of Kondo lattices below coherence temperature can be very successfully described in terms of a two-fluid model, with Kondo impurity and heavy electron Fermi liquid contributions. We analyze thermodynamic properties of Kondo lattices using 1/N slave boson treatment of the periodic Anderson model and show that these two contributions indeed arise below the coherence temperature. We find that the Kondo impurity contribution to thermodynamics corresponds to thermal excitations into the flat portion of the energy spectrum.
description: 7 pages, 2 figures
Search for Optically Dark Infrared Galaxies without Counterparts of Subaru Hyper Suprime-Cam in the AKARI North Ecliptic Pole Wide Survey Field
Creators: name: Toba, Yoshiki
name: Goto, Tomotsugu
name: Oi, Nagisa
name: Wang, Ting-Wen
name: Kim, Seong Jin
name: Ho, Simon C. -C.
name: Burgarella, Denis
name: Hashimoto, Tetsuya
name: Hsieh, Bau-Ching
name: Huang, Ting-Chi
name: Hwang, Ho Seong
name: Ikeda, Hiroyuki
name: Kim, Helen K.
name: Kim, Seongjae
name: Lee, Dongseob
name: Malkan, Matthew A.
name: Matsuhara, Hideo
name: Miyaji, Takamitsu
name: Momose, Rieko
name: Ohyama, Youichi
name: Oyabu, Shinki
name: Pearson, Chris
name: Santos, Daryl Joe D.
name: Shim, Hyunjin
name: Takagi, Toshinobu
name: Ueda, Yoshihiro
name: Utsumi, Yousuke
name: Wada, Takehiko
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 present the physical properties of AKARI sources without optical counterparts in optical images from the Hyper Suprime-Cam (HSC) on the Subaru telescope. Using the AKARI infrared (IR) source catalog and HSC optical catalog, we select 583 objects that do not have HSC counterparts in the AKARI North Ecliptic Pole (NEP) wide survey field ($\sim 5$ deg$^{2}$). Because the HSC limiting magnitude is deep ($g_{\rm AB}$ $\sim 28.6$), these are good candidates for extremely red star-forming galaxies (SFGs) and/or active galactic nuclei (AGNs), possibly at high redshifts. We compile multi-wavelength data out to 500 $μ$m and use it for Spectral Energy Distribution (SED) fitting with CIGALE to investigate the physical properties of AKARI galaxies without optical counterparts. We also compare their physical quantities with AKARI mid-IR selected galaxies with HSC counterparts. The estimated redshifts of AKARI objects without HSC counterparts range up to $z\sim 4$, significantly higher than that of AKARI objects with HSC counterparts. We find that: (i) 3.6 $-$ 4.5 $μ$m color, (ii) AGN luminosity, (iii) stellar mass, (iv) star formation rate, and (v) $V$-band dust attenuation in the interstellar medium of AKARI objects without HSC counterparts are systematically larger than those of AKARI objects with counterparts. These results suggest that our sample includes luminous, heavily dust-obscured SFGs/AGNs at $z\sim 1-4$ that are missed by previous optical surveys, providing very interesting targets for the coming James Webb Space Telescope era.
description: 17 pages, 13 figures, and 2 tables, accepted for publication in ApJ
TOTAL ECONOMIC VALUATION OF STREAM RESTORATION USING INTERNET AND MAIL SURVEYS
Creators: name: Collins, Alan R.
name: Rosenberger, Randall S.
name: Fletcher, Jerald J.
name: Collins, Alan R.
name: Rosenberger, Randall S.
name: Fletcher, Jerald J.
Publisher: name: Unknown
Year: 2004
Subjects: Resource /Energy Economics and Policy

description: The economic value of restoring Deckers Creek in Monongalia and Preston Counties of West Virginia was determined from mail, internet and personal interview surveys. Multi-attribute, choice experiments were conducted and nested logit models were estimated to derive the economic values of full restoration for three attributes of this creek: aquatic life, swimming, and scenic quality. The relative economic values of attributes were: aquatic life > scenic quality ~ swimming. These economic values imply that respondents had the highest value for aquatic life when fully restoring Deckers Creek to a sustainable fishery rather than "put and take" fishery that can not sustain a fish population (defined as moderate restoration for aquatic life). The consumer surplus estimates for full restoration of all three attributes ranged between $12 and $16 per month per household. Potential stream users (anglers) had the largest consumer surplus gain from restoration while non-angler respondents had the lowest. When the consumer surplus estimates were aggregated up to the entire watershed population, the benefit from restoration of Deckers Creek was estimated to be about $1.9 million annually. This benefit does not account for any economic values from partial stream restoration. Based upon log likelihood tests of the nested logit models, two sub-samples of the survey population (the general population and stream users) were found to be from the same population. Thus, restoration choices by stream users may be representative of the watershed population, although the sample size of stream users was small in this study.
Decision Support System for Soybean Rust (Phakopsora pachyrhizi) Management using QnD
Creators: name: Kiker, Greg
name: Ranjan, Ram
name: Kiker, Greg
name: Ranjan, Ram
Publisher: name: Unknown
Year: 2006
Subjects: Research Methods/ Statistical Methods

description: The objective of this project is to design a decision support system for soybean rust management using gaming software that incorporates farmer's decision making in the face of risks from soybean rust. Learning from past actions and neighbor's actions are also incorporated. Farmers observe rust outbreak in the current and past periods and decide over how much of land to allocate between soybean, corn and other crops. This decision is influenced by maximization of expected profits criterion which entails crop rotation choices that are based upon perceived risks, yield drags and input costs from altering optimum rotation patterns. Adoption of new technology in terms of selecting better rust management practices is also analyzed in an adaptive management framework. The software meets the need of guiding policy formulation besides training stakeholders in making economically sound choices in the absence of empirical data over pest infestation.
Contribution to Price Discovery in the Forest Product Market: Futures, Forwards, and Spot Markets
Creators: name: Manfredo, Mark R.
name: Sanders, Dwight R.
name: Manfredo, Mark R.
name: Sanders, Dwight R.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Marketing
subject: FOS: Economics and business

description: This research examines the lead-lag relationships between futures prices, prices from a cash forward market, and spot prices for two forest product markets. Results suggest that for 2x4 lumber, the forward market provides some level of price discovery, but futures play a dominant price discovery role for oriented strand board.
Alternating direction implicit time integrations for finite difference acoustic wave propagation: Parallelization and convergence
Creators: name: Otero, B.
name: Rojas, O.
name: Moya, F.
name: Castillo, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This work studies the parallelization and empirical convergence of two finite difference acoustic wave propagation methods on 2-D rectangular grids, that use the same alternating direction implicit (ADI) time integration. This ADI integration is based on a second-order implicit Crank-Nicolson temporal discretization that is factored out by a Peaceman-Rachford decomposition of the time and space equation terms. In space, these methods highly diverge and apply different fourth-order accurate differentiation techniques. The first method uses compact finite differences (CFD) on nodal meshes that requires solving tridiagonal linear systems along each grid line, while the second one employs staggered-grid mimetic finite differences (MFD). For each method, we implement three parallel versions: (i) a multithreaded code in Octave, (ii) a C++ code that exploits OpenMP loop parallelization, and (iii) a CUDA kernel for a NVIDIA GTX 960 Maxwell card. In these implementations, the main source of parallelism is the simultaneous ADI updating of each wave field matrix, either column-wise or row-wise, according to the differentiation direction. In our numerical applications, the highest performances are displayed by the CFD and MFD CUDA codes that achieve speedups of 7.21x and 15.81x, respectively, relative to their C++ sequential counterparts with optimal compilation flags. Our test cases also allow to assess the numerical convergence and accuracy of both methods. In a problem with exact harmonic solution, both methods exhibit convergence rates close to 4 and the MDF accuracy is practically higher. Alternatively, both convergences decay to second order on smooth problems with severe gradients at boundaries, and the MDF rates degrade in highly-resolved grids leading to larger inaccuracies. This transition of empirical convergences agrees with the nominal truncation errors in space and time.
description: 20 pages, 5 figures
When to Get In and Out of Dairy Farming: A Real Option Analysis
Creators: name: Tauer, Loren W.
name: Tauer, Loren W.
Publisher: name: Unknown
Year: 2006
Subjects: subject: Farm Management
subject: Dairy farming
subject: entry-exit
subject: investment
subject: real options

description: The Dixit entry/exit real option model was applied to the entry/exit decisions of New York dairy farmers. For the cost structure of a 500-cow farm the entry milk price is $17.52 per hundredweight (cwt.) and the exit milk price is $10.84. For the 50-cow farm cost structure the entry price is higher at $23.71 per cwt., and the exit price is also higher at $13.48. If infinite numbers of representative farms enter and exit at these prices, the price of milk should range between $13.48 and $17.52 per cwt.
How Much Do Starting Values Really Matter? An Empirical Comparison of Genetic Algorithm and Traditional Approaches
Creators: name: Tonsor, Glynn T.
name: Kastens, Terry L.
name: Tonsor, Glynn T.
name: Kastens, Terry L.
Publisher: name: Unknown
Year: 2006
Subjects: Demand and Price Analysis

description: This research evaluates the impact of using different starting conditions in estimating meat demand systems. Results suggest that as the econometric task becomes increasingly nonlinear, specification of starting conditions becomes increasingly important. This work demonstrates implications of failing to use the best available starting value conditions and how these implications vary with the complexity of the underlying econometric model of interest. Furthermore, this piece proposes a universal approach to be used by all applied econometric practioners to developing appropriate starting values for use in subsequent model estimation.
Extending Coggia-Couvreur Attack on Loidreau's Rank-metric Cryptosystem
Creators: name: Ghatak, Anirban
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: [2010] 11T71

description: A recent paper by Coggia and Couvreur presents a polynomial time key-recovery attack on Loidreau's encryption scheme, based on rank-metric codes, for some parameters. The secret matrix component of Loidreau's scheme is chosen over a defining subspace of the field associated with the rank-metric code. We partially extend the Coggia-Couvreur attack to deal with the case when the defining subspace has dimension greater than 2.
description: 19 pages
An empirical model of optimal import phytosanitary inspection
Creators: name: Surkov, Ilya V.
name: Oude Lansink, Alfons G.J.M.
name: Van Kooten, Olaf
name: Surkov, Ilya V.
name: Oude Lansink, Alfons G.J.M.
name: Van Kooten, Olaf
Publisher: name: Unknown
Year: 2006
Subjects: International Relations/Trade

description: This paper presents an empirical model of optimal budget allocation for import inspection of imported commodities. In this model, the budget constrained inspecting Agency wants to minimize the expected pest costs related to import trade pathways. The model is applied to the problem of budget allocation for inspection of chrysanthemum cuttings imported to the Netherlands. The numerical results imply that under a budget constraint, resources should be first allocated for inspection of pathways with the greatest expected pest costs. Pathways with lower expected pest costs should receive less or no resources. The inspecting Agency has to trade off risks between inspected and non-inspected pathways.
Africa's Education Enigma? The Nigerian story.
Creators: name: Uwaifo, Ruth
name: Uwaifo, Ruth
Publisher: name: Unknown
Year: 2006
Subjects: Labor and Human Capital

description: In the last two decades, the social and economic benefits of formal education in sub-Saharan Africa has been debated. Anecdotal evidence points to low and time varying returns to education in Africa. Unfortunately, there has been little econometric evidence to support these claims at the micro level. Here I focus on Nigeria, a country that holds 1/5 of Africa's population, and use instruments based on the exogenous timing of the implementation and withdrawal of free primary education across regions in this country to precisely estimate the returns to education in the late 1990s. In addition, claims of time differences in returns are investigated. The results show that the average returns to education are particularly low in the 90s, in contrast to conventional wisdom for developing countries (3.6 % for every extra year of schooling in 1998). In addition, there have been significant changes in returns to education for head of households over short time periods. These results shed new light on both the changes in demand for education in Nigeria and the increased emigration rates from African countries that characterized the 90s.
description: Replaced with revised version of paper 07/11/06.
Bargaining and market power in a GIS-based hedonic pricing model of the agricultural land market
Creators: name: Cotteleer, Geerte
name: Gardebroek, Cornelis
name: Cotteleer, Geerte
name: Gardebroek, Cornelis
Publisher: name: Unknown
Year: 2006
Subjects: Land Economics/Use

description: Agricultural land markets differ greatly from the textbook-case of perfect competition. This is why standard hedonic pricing techniques should be revised before applying this technique to this market. The objective of this paper is to determine (a) the deviation from the competitive market price of agricultural land in the Netherlands due to market power and the existence of an excess surplus and (b) the effect of bargaining power on the division of excess surplus between the eventual seller and the buyer in the market for agricultural land.
AN EMPIRICAL ANALYSIS OF PUBLIC AND PRIVATE SPILLOVERS WITHIN THE CANOLA BIOTECH INDUSTRY
Creators: name: Gray, Richard S.
name: Malla, Stavroula
name: Tran, Kien C.
name: Gray, Richard S.
name: Malla, Stavroula
name: Tran, Kien C.
Publisher: name: Unknown
Year: 2003
Subjects: Agribusiness

description: The study uses firm-specific data in the biotech canola industry to empirically examine research spillovers among public and private firms at the level of research output, research sales revenue, and research social revenue. The non-pecuniary spillovers that are examined include basic research, human capital/ knowledge (as measured through other-firm expenditures) and genetics (as measured through yields of other-firms). The results provide strong empirical evidence of several research spillovers in the biotech crop research industry such as: basic and applied public research creates a positive spillover for private firms at all levels; applied expenditure within-group reduces other-firm revenue while between-group expenditure increases revenue; genetic spillovers within-group have a positive impact on yield but tend to have a negative impact on firm revenue.
Supersymmetric Yang-Mills quantum mechanics in various dimensions
Creators: name: Wosiek, Jacek
name: Campostrini, Massimo
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Supersymmetric Yang-Mills quantum mechanics (SYMQM) results from the dimensional reduction of the Yang-Mills field theory in $D$ space-time dimensions to a single point in the $D-1$ dimensional space. It can be also viewed as the effective quantum mechanics of zero momentum modes of the original theory. These systems were first considered in 80's as simple models with supersymmetry. Independently, zero-volume field theories (especially pure Yang-Mills) were employed as the starting point of the small volume expansion, which is an important theoretical tool complementary to early lattice calculations. Later the models attracted a new wave of interest after the hypothesis of the equivalence, between the $D=10, SU(\infty)$ SYMQM and a M-theory of D0 branes. In this talk some new results obtained for the D=4 system with SU(2) gauge symmetry will be presented.
description: 6 pages, 6 figures, talk presented at Lattice 2005 (Theoretical Developments)
Exciton self-trapping in bulk polyethylene
Creators: name: Ceresoli, D.
name: Righi, M. C.
name: Tosatti, E.
name: Scandolo, S.
name: Santoro, G.
name: Serra, S.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We studied theoretically the behavior of an injected electron-hole pair in crystalline polyethylene. Time-dependent adiabatic evolution by ab-initio molecular dynamics simulations show that the pair will become self-trapped in the perfect crystal, with a trapping energy of about 0.38 eV, with formation of a pair of trans-gauche conformational defects, three C$_2$H$_4$ units apart on the same chain. The electron is confined in the inter-chain pocket created by a local, 120$^\circ$ rotation of the chain between the two defects, while the hole resides on the chain and is much less bound. Despite the large energy stored in the trapped excitation, there does not appear to be a direct non-radiative channel for electron-hole recombination. This suggests that intrinsic self-trapping of electron-hole pairs inside the ideal quasi-crystalline fraction of PE might not be directly relevant for electrical damage in high-voltage cables.
description: 9 pages, 3 figs; using iopart.cls
D-branes in non-critical superstrings and minimal super Yang-Mills in various dimensions
Creators: name: Ashok, Sujay K.
name: Murthy, Sameer
name: Troost, Jan
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct and analyze D-branes in superstring theories in even dimensions less than ten. The backgrounds under study are supersymmetric R^{d-1,1} \times SL(2,R)_k / U(1) where the level of the supercoset is tuned such as to provide bona fide string theory backgrounds. We provide exact boundary states for D-branes that are localized at the tip of the cigar SL(2,R)/U(1) supercoset conformal field theory. We analyze the spectra of open strings on these D-branes and show explicitly that they are consistent with supersymmetry in d=2,4 and 6. The low energy theory on the world-volume of the D-brane in each case is pure Yang-Mills theory with minimal supersymmetry. In the case with four macroscopic flat directions d=4, we realize an N=1 super Yang-Mills theory. We interpret the backreaction for the dilaton as the running of the gauge coupling, and study the relation between R-symmetry breaking in the gauge theory and the backreaction on the RR axion.
description: 45 pages, harvmac; v2: substantial improvements in sections 5 and 6