cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Development and Simulation-based Testing of a 5G-Connected Intersection AEB System
Creators: name: Khayyat, Michael
name: Arrigoni, Stefano
name: Cheli, Federico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Networking and Internet Architecture (cs.NI)
subject: Robotics (cs.RO)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: In Europe, 20% of road crashes occur at intersections. In recent years, evolving communication technologies are making V2V and V2I faster and more reliable; with such advancements, these crashes, as well as their economic cost, can be partially reduced. In this work, we concentrate on straight path intersection collisions. Connectivity-based algorithms relying on 5G technology and smart sensors are presented and compared to a commercial radar AEB logic in order to evaluate performances and effectiveness in collision avoidance or mitigation. The aforementioned novel safety systems are tested in a blind intersection and low adherence scenario. The first algorithm proposed is obtained by incorporating connectivity information to the original control scheme, while the second algorithm proposed is a novel control logic fully capable of utilizing also adherence estimation provided by smart sensors. Test results show an improvement in terms of safety for both the architecture and high prospects for future developments.
Desafios
Creators: name: Mota Júnior, Antônio de Macêdo
Publisher: name: figshare
Year: 2021
Subjects: subject: 130304 Educational Administration, Management and Leadership
subject: FOS: Educational sciences

description: O presente trabalho aborda o tema da política de financiamento da educação superior no Estado da Bahia, no que diz respeito às Universidades Estaduais Baianas (UEBAs), em especial à Universidade Estadual de Feira de Santana (UEFS). Este trabalho apresenta resultados preliminares de estudos exploratórios, bibliográficos e documentais, com o objetivo de investigar como se caracterizou a política de financiamento da UEFS, no período de 2005 a 2014, diante de um quadro de dificuldades e limitações orçamentário-financeiras. Este estudo realiza uma análise descritiva da situação orçamentário-financeira e procura descrever os desafios e obstáculos enfrentados por essa instituição. Os resultados evidenciam um cenário desafiador para as UEBAs, em relação ao financiamento, oferta e expansão de educação superior no Estado da Bahia, marcado pelo nível de concentração orçamentária das despesas de pessoal e encargos; reduções orçamentárias na cota inicial para custeio e investimentos em relação aos exercícios anteriores; além de interferências na autonomia administrativa e na gestão financeira da universidade. O estudo ainda propõe reflexões sobre possíveis caminhos e ações propositivas para o financiamento, fortalecimento e sustentabilidade financeira das UEBAs.
Core-valence correlations for atoms with open shells
Creators: name: Dzuba, V. A.
name: Flambaum, V. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present an efficient method of inclusion of the core-valence correlations into the configuration interaction (CI) calculations. These correlations take place in the core area where the potential of external electrons is approximately constant. A constant potential does not change the core electron wave functions and Green's functions. Therefore, all operators describing interaction of $M$ valence electrons and $N-M$ core electrons (the core part of the Hartree-Fock Hamiltonian $V^{N-M}$, the correlation potential $\hatΣ_1({\bf r},{\bf r'},E)$ and the screening of interaction between valence electrons by the core electrons $\hatΣ_2$) may be calculated with all $M$ valence electrons removed. This allows one to avoid subtraction diagrams which make accurate inclusion of the core-valence correlations for $M>2$ prohibitively complicated. Then the CI Hamiltonian for $M$ valence electrons is calculated using orbitals in complete $V^{N}$ potential (the mean field produced by all electrons); $\hatΣ_1$ + $\hatΣ_2$ are added to the CI Hamiltonian to account for the core-valence correlations. We calculate $\hatΣ_1$ and $\hatΣ_2$ using many-body perturbation theory in which dominating classes of diagrams are included in all orders. We use neutral Xe I and all positive ions up to Xe VIII as a testing ground. We found that the core electron density for all these systems is practically the same. Therefore, we use the same $\hatΣ_1$ and $\hatΣ_2$ to build the CI Hamiltonian in all these systems ($M=1,2,3,4,5,6,7,8$). Good agreement with experiment for energy levels and Landé factors is demonstrated for all cases from Xe I to Xe VIII.
description: 13 pages, 5 figures
Investigating the Relationship Between Air Quality and COVID-19 Transmission
Creators: name: Albrecht, Laura
name: Czarnecki, Paulina
name: Sakelaris, Bennet
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: It is hypothesized that short-term exposure to air pollution may influence the transmission of aerosolized pathogens such as COVID-19. We used data from 23 provinces in Italy to build a generalized additive model to investigate the association between the effective reproductive number of the disease and air quality while controlling for ambient environmental variables and changes in human mobility. The model finds that there is a positive, nonlinear relationship between the density of particulate matter in the air and COVID-19 transmission, which is in alignment with similar studies on other respiratory illnesses.
description: Supplementary materials available at: https://jds-online.org/journal/JDS/article/549/info
Nationale Forschungsdateninfrastruktur (NFDI) – Status Quo
Creators: name: Bruhn, Kai-Christian
Publisher: name: Zenodo
Year: 2019
Subjects: NFDI
FDM
RDM

description: Vortrag gehalten auf dem 2. Aktionstag Forschungsdaten des Kompetenzteams Forschungsdaten an der Johannes Gutenberg-Universität Mainz am 26. Juni 2019 Lecture held at the "2. Aktionstag Forschungsdaten des Kompetenzteams Forschungsdaten" at the Johannes Gutenberg-University Mainz on June 26, 2019
Phonon-mediated high-temperature superconductivity in ternary borohydride KB$_2$H$_8$ around 12 GPa
Creators: name: Gao, Miao
name: Yan, Xun-Wang
name: Lu, Zhong-Yi
name: Xiang, Tao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Discovery of high-temperature superconductivity in hydrogen-rich compounds has fuelled the enthusiasm for finding materials with more promising superconducting properties among hydrides. However, the ultrahigh pressure needed to synthesize and maintain high-temperature hydrogen-rich superconductors hinders the experimental investigation of these materials. For practical applications, it is also highly desired to find more hydrogen-rich materials that superconduct at high temperatures but under relatively lower pressures. Based on first-principles density functional theory, we calculate the electronic and phonon band structures for a ternary borohydride formed by intercalating BH$_4$ tetrahedrons into a face-centered-cubic potassium lattice, KB$_2$H$_8$. Remarkably, we find that this material is dynamically stable and one of its $sp^3$-hybridized $σ$-bonding bands is metallized (i.e. partially filled) above a moderate high pressure. This metallized $σ$-bonding band couples strongly with phonons, giving rise to a strong superconducting pairing potential. By solving the anisotropic Eliashberg equations, we predict that the superconducting transition temperature of this compound is 134-146 K around 12 GPa.
description: 5 pages, 4 figures
Additional file 3 of A 20-year bibliometric analysis of Fuchs endothelial corneal dystrophy: from 2001 to 2020
Creators: name: Lin, Feng
name: Zhang, Luoli
name: Wang, Yimin
name: Fu, Dan
name: Wang, Yuliang
name: Zhou, Xingtao
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Biotechnology
subject: Cancer
subject: Science Policy
subject: Plant Biology

description: Additional file 3: Supplementary Figure 2. Co-authorship analysis of countries. The size of a node is proportional to the number of collaborations.
Challenge and Opportunity: Rethinking the Role and Function of Developmental Education in Community College
Creators: name: Bailey, Thomas R.
Publisher: name: Columbia University
Year: 2008
Subjects: Community college students--Education
Community colleges

description: Community colleges are charged with teaching students college-level material, yet a majority of their students arrive with academic skills judged too weak to allow them to engage successfully in college-level work in at least one subject area. Colleges address this problem by providing extensive programs of developmental education designed to strengthen students' skills so they can successfully complete college-level courses. This Brief, based on a longer paper, reviews evidence on students who enter community college with weak academic skills, and it summarizes study findings on the effectiveness of developmental education. It suggests that, on average, developmental education is not very effective in overcoming student weaknesses. The Brief concludes with recommendations for a broad reform agenda based on a comprehensive approach to assessment, more research that tracks students through their early experiences at college, a blurring of the distinction between developmental and "college-level" students that could improve pedagogy for both groups of students, and strategies to streamline developmental programs and accelerate students' enrollment in college-level courses.
Basic Facts About Low-income Children, 2010: Children Under Age 6
Creators: name: Addy, Sophia D.
name: Wight, Vanessa
Publisher: name: Columbia University
Year: 2012
Subjects: Poor children
Poor families
Poverty
Poverty--Measurement

description: Children represent 24 percent of the population. Yet, they comprise 34 percent of all people in poverty. Among all children, 44 percent live in low-income families and approximately one in every five (21 percent) live in poor families. Our very youngest children, infants and toddlers under age 3, appear to be particularly vulnerable, with 48 percent living in low-income families, including 25 percent living in poor families. Winding up in a low-income or poor family does not happen by chance. There are a range of factors associated with children's experiences of economic insecurity, including race/ethnicity and parents' educational attainment and employment. This fact sheet, which is an update to the series based on the 2010 American Community Survey (ACS), describes the demographic, socio-economic, and geographic characteristics of children and their parents -- highlighting the important factors that appear to distinguish low-income and poor children from their less disadvantaged counterparts.
A historical-ethnographic account of a Canadian woman in sport, 1920-1938 : the story of Margaret (Bell) Gibson
Creators: name: Laubman, Katherine M.
Publisher: name: University of British Columbia
Year: 2010

description: This study attempted to discover and describe the cultural knowledge and understandings that Margaret (Bell) Gibson derived from her performance as a highly successful athlete in Canadian women's sport during the 1920s - 1930s. A case study approach was used that employed qualitative research strategies. This approach was considered appropriate as prominent issues in women's lives are subtle and context-bound. A series of five informal interviews was conducted with Bell, using an ethnographic approach developed by Spradley (1979). Each interview was recorded and transcribed into text. The text was then validated by Bell, prior to analysis by the researcher. An inductive-reflexive analysis of the text was employed, as much of the information emerged as Bell recalled her experiences in sport. This involved the use of an evolving methodology, which identified classifications of knowledge and structures of thought as they were revealed. Bell's narrative was contextually-grounded in a review of Canadian history from 1920 to 1938, as this seemed to connect Bell's experience as a sportswoman to the broader socio-historical milieu. Findings were substantiated through a process of triangulated inquiry wherein verification was sought from newspaper clippings, official records, and historical documents. The analysis of Bell's narrative revealed a complex system of knowledge based on categories of information related to the structure of sport, social network, jumping, cultural activities, concepts of space and timing, and role definition. Documentation of the major sporting events Bell experienced, as an athlete, was also recorded. Implications for future research were discussed.
Additional file 3 of TuRLK1, a leucine-rich repeat receptor-like kinase, is indispensable for stripe rust resistance of YrU1 and confers broad resistance to multiple pathogens
Creators: name: Zou, Shenghao
name: Tang, Yansheng
name: Xu, Yang
name: Ji, Jiahao
name: Lu, Yuanyuan
name: Wang, Huanming
name: Li, Qianqian
name: Tang, Dingzhong
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 3. Original image for Figure 3b.
HAT-P-7b: An Extremely Hot Massive Planet Transiting a Bright Star in the Kepler Field
Creators: name: Pal, A.
name: Bakos, G. A.
name: Torres, G.
name: Noyes, R. W.
name: Latham, D. W.
name: Kovacs, Geza
name: Marcy, G. W.
name: Fischer, D. A.
name: Butler, R. P.
name: Sasselov, D. D.
name: Sipocz, B.
name: Esquerdo, G. A.
name: Kovacs, Gabor
name: Stefanik, R.
name: Lazar, J.
name: Papp, I.
name: Sari, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the latest discovery of the HATNet project; a very hot giant planet orbiting a bright (V = 10.5) star with a small semi-major axis of a = 0.0377 +/- 0.0005 AU. Ephemeris for the system is P = 2.2047299 +/- 0.0000040 days, mid-transit time E = 2,453,790.2593 +/- 0.0010 (BJD). Based on the available spectroscopic data on the host star and photometry of the system, the planet has a mass of Mp = 1.78+/-^{0.08}_{0.05} MJup and radius of Rp = 1.36+/-^{0.20}_{0.09} RJup. The parent star is a slightly evolved F6 star with M = 1.47+/-^{0.08}_{-0.05} Msun,R = 1.84+/-^{0.23}_{0.11} Rsun, Teff = 6350 +/- 80 K, and metallicity [Fe/H] = +0.26 +/- 0.08. The relatively hot and large host star, combined with the close orbit of the planet, yield a very high planetary irradiance of (4.71+/-^{1.44}_{0.05}) 10^9 erg cm^{-2}s^{-1}, which places the planet near the top of the pM class of irradiated planets as defined by Fortney et al. (2007). If as predicted by Fortney et al. (2007) the planet re-radiates its absorbed energy before distributing it to the night side, the day-side temperature should be about (2730+/-^{150}_{100}) K. Because the host star is quite bright, measurement of the secondary eclipse should be feasible for ground-based telescopes, providing a good opportunity to compare the predictions of current hot Jupiter atmospheric models with the observations. Moreover, the host star falls in the field of the upcoming Kepler mission; hence extensive space-borne follow-up, including not only primary transit and secondary eclipse observations but also asteroseismology, will be possible.
description: Accepted for publication in ApJ, 8 pages, 2 figures
The Near-Threshold Production of Phi Mesons in pp Collisions
Creators: name: Hartmann, M.
name: Maeda, Y.
name: Keshelashvilli, I.
name: Koch, H. R.
name: Mikirtytchiants, S.
name: Barsov, S.
name: Borgs, W.
name: Buescher, M.
name: Dimitrov, V. I.
name: Dymov, S.
name: Hejny, V.
name: Kleber, V.
name: Koptev, V.
name: Kulessa, P.
name: Mersmann, T.
name: Merzliakov, S.
name: Mussgiller, A.
name: Nekipelov, M.
name: Nioradze, M.
name: Ohm, H.
name: Pysz, K.
name: Schleichert, R.
name: Stein, H. J.
name: Stroeher, H.
name: Watzlawik, K. -H.
name: Wuestner, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The pp->pp phi reaction has been studied at the Cooler Synchrotron COSY-Juelich, using the internal beam and ANKE facility. Total cross sections have been determined at three excess energies epsilon near the production threshold. The differential cross section closest to threshold at epsilon=18.5 MeV exhibits a clear S-wave dominance as well as a noticeable effect due to the proton-proton final state interaction. Taken together with data for pp omega-production, a significant enhancement of the phi/omega ratio of a factor 8 is found compared to predictions based on the Okubo-Zweig-Iizuka rule.
description: 4 Pages, 3 Figures, 1 Table, submitted to Phys. Rev. Lett
Energetics and 3-D Structure of Elementary Events in Solar Coronal Heating
Creators: name: Einaudi, G.
name: Dahlburg, R. B.
name: Ugarte-Urra, I.
name: Reep, J. W.
name: Rappazzo, A. F.
name: Velli, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Parker (1972) first proposed that coronal heating was the necessary outcome of an energy flux caused by the tangling of coronal magnetic field lines by photospheric flows. In this paper we discuss how this model has been modified by subsequent numerical simulations outlining in particular the substantial differences between the "nanoflares" introduced by Parker and "elementary events", defined here as small-scale spatially and temporally isolated heating events resulting from the continuous formation and dissipation of field-aligned current sheets within a coronal loop. We present numerical simulations of the compressible 3-D MHD equations using the HYPERION code. We use two clustering algorithms to investigate the properties of the simulated elementary events: an IDL implementation of a Density-Based Spatial Clustering of Applications with Noise (DBSCAN) technique; and our own Physical Distance Clustering (PDC) algorithm. We identify and track elementary heating events in time, both in temperature and in Joule heating space. For every event we characterize properties such as: density, temperature, volume, aspect ratio, length, thickness, duration and energy. The energies of the events are in the range $10^{18}-10^{21}$ ergs, with durations shorter than 100 seconds. A few events last up to 200 seconds and release energies up to $10^{23}$ ergs. While high temperature are typically located at the flux tube apex, the currents extend all the way to the footpoints. Hence a single elementary event cannot at present be detected. The observed emission is due to the superposition of many elementary events distributed randomly in space and time within the loop.
description: Astrophysical Journal, in press
SIZING OF THE AIR CONDITIONING SYSTEM FOR THE COMPUTER ROOMS OF THE HIGHER INSTITUTE OF TECHNOLOGY OF MAMOU, GUINEA
Creators: name: Yacouba CAMARA1*, Tamba Nicolas MILLIMONO2, Amadou Lamarana BAH3, Drissa OUEDRAOGO4,5
Publisher: name: Zenodo
Year: 2023

description: For centuries, electrical energy has become essential in all sectors of life, both in highly industrialized countries and in developing ones. Its production requires a lot of human, financial and material resources, sometimes having negative consequences on the environment. Optimizing its consumption would be essential given the increasingly growing need, especially in a university environment. The general objective of this study is to effectively size the air conditioning system of the computer rooms of the Higher Institute of Technology of Mamou, Guinea, taking into account the specific thermal loads generated by the computer equipment and the local environmental conditions. The study methodology involved measuring the dimensions of the room, evaluating the thermal loads of the different walls, determining the interior volume, and analyzing the different loads due to heat transmission, such as glazing, air renewal, people, lighting, computers, and video projectors. The results indicate a heat transmission surface of 214 m2, with varying thermal loads for each wall. The power of the air conditioner was chosen at 27 kW, with a total number of 12 units. The total thermal loads, including transmissions through walls, glazing, air exchange, people, lighting, computers, and video projectors, were estimated at 118028.8437 KJ/J.
The Scientific Method in Practice: Reproducibility in the Computational Sciences
Creators: name: Stodden, Victoria C.
Publisher: name: Columbia University
Year: 2010
Subjects: Communication of technical information
Computer science

description: Since the 1660's the scientific method has included reproducibility as a mainstay in its effort to root error from scientific discovery. With the explosive growth of digitization in scientific research and communication, it is easier than ever to satisfy this requirement. In computational research experimental details and methods can be recorded in code and scripts, data is digital, papers are frequently online, and the result is the potential for "really reproducible research." Imagine the ability to routinely inspect code and data and recreate others' results: Every step taken to achieve the findings can potentially be transparent. Now imagine anyone with an Internet connection and the capability of running the code being able to do this. This paper investigates the obstacles blocking the sharing of code and data to understand conditions under which computational scientists reveal their full research compendium. A survey of registrants at a top machine learning conference (NIPS) was used to discover the strength of underlying factors that affect the decision to reveal code, data, and ideas. Sharing of code and data is becoming more common as about a third of respondents post some on their websites, and about 85% self report to have some code or data publicly available on the web. Contrary to theoretical expectations, the decision to share work is grounded in communitarian norms, although when work remains hidden private incentives dominate the decision. We find that code, data, and ideas are each regarded differently in terms of how they are revealed and that guidance from scientific norms varies with pervasiveness of computation in the field. The largest barriers to sharing are time involved in preparation of work and the legal Intellectual Property framework scientists face. This paper does two things. It provides evidence in the debate about whether scientists' research revealing behavior is wholly governed by considerations of personal impact or whether the reasoning behind the revealing decision involves larger scientific ideals, and secondly, this research describes the actual sharing behavior in the Machine Learning community.
Measuring fundamental jet properties with multi-wavelength fast timing of the black hole X-ray binary MAXI J1820+070
Creators: name: Tetarenko, A. J.
name: Casella, P.
name: Miller-Jones, J. C. A.
name: Sivakoff, G. R.
name: Paice, J. A.
name: Vincentelli, F. M.
name: Maccarone, T. J.
name: Gandhi, P.
name: Dhillon, V. S.
name: Marsh, T. R.
name: Russell, T. D.
name: Uttley, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present multi-wavelength fast timing observations of the black hole X-ray binary MAXI J1820+070 (ASASSN-18ey), taken with the Karl G. Jansky Very Large Array (VLA), Atacama Large Millimeter/Sub-Millimeter Array (ALMA), Very Large Telescope (VLT), New Technology Telescope (NTT), Neutron Star Interior Composition Explorer (NICER), and XMM-Newton. Our data set simultaneously samples ten different electromagnetic bands (radio - X-ray) over a 7-hour period during the hard state of the 2018-2019 outburst. The emission we observe is highly variable, displaying multiple rapid flaring episodes. To characterize the variability properties in our data, we implemented a combination of cross-correlation and Fourier analyses. We find that the emission is highly correlated between different bands, measuring time-lags ranging from hundreds of milliseconds between the X-ray/optical bands to minutes between the radio/sub-mm bands. Our Fourier analysis also revealed, for the first time in a black hole X-ray binary, an evolving power spectral shape with electromagnetic frequency. Through modelling these variability properties, we find that MAXI J1820+070 launches a highly relativistic ($Γ=6.81^{+1.06}_{-1.15}$) and confined ($ϕ=0.45^{+0.13}_{-0.11}$ deg) jet, which is carrying a significant amount of power away from the system (equivalent to $\sim0.6 \, L_{1-100{\rm keV}}$). We additionally place constraints on the jet composition and magnetic field strength in the innermost jet base region. Overall, this work demonstrates that time-domain analysis is a powerful diagnostic tool for probing jet physics, where we can accurately measure jet properties with time-domain measurements alone.
description: 23 pages, 16 figures, accepted to MNRAS
Commutator identities on associative algebras and integrability of nonlinear pde's
Creators: name: Pogrebkov, A. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It is shown that commutator identities on associative algebras generate solutions of linearized integrable equations. Next, a special kind of the dressing procedure is suggested that in a special class of integral operators enables to associate to such commutator identity both nonlinear equation and its Lax pair. Thus problem of construction of new integrable pde's reduces to construction of commutator identities on associative algebras.
description: 12 pages
Tropical Underdevelopment
Creators: name: Sachs, Jeffrey D.
Publisher: name: Columbia University
Year: 2000
Subjects: Managerial economics
Economics
Geography

description: Most recent cross-country analyses of economic growth have neglected physical geography as a determinant of economic growth. This paper reviews the distinctive development challenges faced by economies situated in tropical climates. Using geographic information system (GIS) mapping, the paper presents evidence that production technology in the tropics has lagged behind temperate zone technology in the two critical areas of agriculture and health, and this in turn opened a substantial income gap between climate zones. The difficulty of mobilizing energy resources in tropical economies is emphasized as another significant contributor to the income gap. These factors have been amplified by geopolitical power imbalances and by the difficulty of applying temperate-zone technological advances in the tropical setting. The income gap has also been amplified because poor public health and weak agricultural technology in the tropics have combined to slow the demographic transition from high fertility and mortality rates to low fertility and mortality rates. The analysis suggests that economic development in tropical ecozones would benefit from a concerted international effort to develop health and agricultural technologies specific to the needs of the tropical economies.
Why we (usually) don't have to worry about multiple comparisons
Creators: name: Gelman, Andrew E.
name: Hill, Jennifer
name: Yajima, Masanao
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Bayesian statistical decision theory
subject: Multilevel models (Statistics)
subject: Statistical hypothesis testing

description: Applied researchers often find themselves making statistical inferences in settings that would seem to require multiple comparisons adjustments. We challenge the Type I error paradigm that underlies these corrections. Moreover we posit that the problem of multiple comparisons can disappear entirely when viewed from a hierarchical Bayesian perspective. We propose building multilevel models in the settings where multiple comparisons arise. Multilevel models perform partial pooling (shifting estimates toward each other), whereas classical procedures typically keep the centers of intervals stationary, adjusting for multiple comparisons by making the intervals wider (or, equivalently, adjusting the p-values corresponding to intervals of fixed width). Thus, multilevel models address the multiple comparisons problem and also yield more efficient estimates, especially in settings with low group-level variation, which is where multiple comparisons are a particular concern.
Bogoliubov-Cerenkov radiation in a Bose-Einstein condensate flowing against an obstacle
Creators: name: Carusotto, I.
name: Hu, S. X.
name: Collins, L. A.
name: Smerzi, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study the density modulation that appears in a Bose-Einstein condensate flowing with supersonic velocity against an obstacle. The experimental density profiles observed at JILA are reproduced by a numerical integration of the Gross-Pitaevskii equation and then interpreted in terms of Cerenkov emission of Bogoliubov excitations by the defect. The phonon and the single-particle regions of the Bogoliubov spectrum are respectively responsible for a conical wavefront and a fan-shaped series of precursors.
Quasi-periodic oscillations from the accretion disk around rotating traversable wormholes
Creators: name: Deligianni, Efthimia
name: Kunz, Jutta
name: Nedkova, Petya
name: Yazadjiev, Stoytcho
name: Zheleva, Radostina
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We study the quasi-periodic oscillations from the accretion disk around rotating traversable wormholes by means of the resonance models. We investigate the linear stability of the circular geodesic orbits in the equatorial plane for a general class of wormhole geometries deriving analytical expressions for the epicyclic frequencies. Since wormholes can often mimic black holes in the astrophysical observations, we analyze the properties of the quasi-circular oscillatory motion in comparison with the Kerr black hole. We demonstrate that wormholes possess distinctive features, which can be observationally significant. It is characteristic for the Kerr black hole that the orbital and the epicyclic frequencies obey a constant ordering in the whole range of the spin parameter. In contrast, for wormhole spacetimes we can have various types of orderings between the frequencies in the different regions of the parametric space. This enables the excitation of much more diverse types of resonances including parametric and forced resonances of lower order, which could lead to stronger observable signals. In addition, for co-rotating orbits the resonances can be excited in a very close neighbourhood of the wormhole throat for a wide range of values of the angular momentum, making wormholes a valuable laboratory for testing strong gravity.
description: 23 pages, 7 figures
Bounds on the global dimension of certain piecewise hereditary categories
Creators: name: Ladkani, Sefi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 18G20; 18E30; 18F20; 16G20; 06A11

description: We give bounds on the global dimension of a finite length, piecewise hereditary category in terms of quantitative connectivity properties of its graph of indecomposables. We use this to show that the global dimension of a finite dimensional, piecewise hereditary algebra A cannot exceed 3 if A is an incidence algebra of a finite poset or more generally, a sincere algebra. This bound is tight.
description: 7 pages; slightly revised; to appear in J. Pure Appl. Algebra
Additional file 1 of Nanosecond pulsed electric fields enhance mesenchymal stem cells differentiation via DNMT1-regulated OCT4/NANOG gene expression
Creators: name: Li, Kejia
name: Ning, Tong
name: Wang, Hao
name: Jiang, Yangzi
name: Zhang, Jue
name: Ge, Zigang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1 : Supplementary Methods and Materials.
Wavelets for Contrast Enhancement of Digital Mammography
Creators: name: Laine, Andrew F.
name: Fan, Jian
name: Yang, Wuhai
Publisher: name: Columbia University
Year: 1995
Subjects: Medicine
Biomedical engineering

description: Multiresolution representations provided an adaptive mechanism for the local emphasis of features of importance to mammography. In general, improvements in image contrast for multiscale image processing algorithms were superior to those obtained using existing competitive algorithms. These initial results are encouraging and suggest that wavelet based image processing algorithms could play an important role in improving the imaging performance of digital mammography. In part 2, features blended into the mammograms were "idealized" representations of the types of objects that are of primary interest to mammographers. The resultant mammographic images were appropriate for the purpose of demonstrating improved image contrast made possible by wavelet based image processing algorithms. These images were also useful for comparing multiscale wavelet based algorithms with existing image processing algorithms. The test results obtained in this study, however, cannot be directly extrapolated to clinical mammography. In addition, it is also important to study possible image artifacts introduced by new wavelet filters, which may increase the false positive rate.
First Saturation Correction in High Energy Proton-Nucleus Collisions: I. Time evolution of classical Yang-Mills fields beyond leading order
Creators: name: Li, Ming
name: Skokov, Vladimir V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In high energy proton-nucleus collisions, the single- and double-inclusive soft gluon productions at the leading order have been calculated and phenomenologically studied in various approaches for many years. These studies do not take into account the saturation and multiple rescatterings in the field of the proton. The first saturation correction to these leading order results (the terms that are enhanced by the combination $α_s^2 μ^2$, where $μ^2$ is the proton's color charge squared per unit transverse area) has not been completely derived despite recent attempts using a diagrammatic approach. This paper is the first in a series of papers towards analytically completing the first saturation correction to physical observables in high energy proton-nucleus collisions. Our approach is to analytically solve the classical Yang-Mills equations in the dilute-dense regime using the Color Glass Condensate effective theory and compute physical observables constructed from classical gluon fields. In the current paper, the Yang-Mills equations are solved perturbatively in the field of the dilute object (the proton). Next-to-leading order and next-to-next-to-leading order analytic solutions are explicitly constructed. A systematic way to obtain all higher order analytic solutions is outlined
description: 53 pages, 9 figures
4th MERIT technical meeting : synthesis report
Creators: name: Cibrelus, Laurence
Publisher: name: Columbia University
Year: 2011
Subjects: Public health
Environmental sciences

description: As established in 2007 and lead by the World Health organization (WHO), the Meningitis Environmental Risk Information Technologies (MERIT) project is a collaborative initiative between the public health, environmental and research communities. MERIT partners work to combine environmental and social, economic and demographic information with public health data to strengthen decisionmaking and preparedness for epidemic meningococcal meningitis in Africa. Conducting such an effort is increasingly important, as both the on-going introduction of the new conjugate vaccine against Neisseria Meningitidis serogroup A (Men A) and some environmental and climate changes are expected to shape the dynamics of meningococcal meningitis in the African Meningitis Belt.
title: Бухгалтерский учет
Creators: name: ELS IPR BOOKS
Publisher: name: Ай Пи Ар Медиа
Year: 2023

description: В практикуме на конкретных примерах с учетом требований нормативно-правовых документов разъясняется порядок отражения фактов финансово-хозяйственной деятельности экономического субъекта. Ситуационные упражнения, представленные в издании, раскрывают содержание типовых операций по учетной работе бухгалтерии предприятия. Подготовлен в соответствии с требованиями Федерального государственного образовательного стандарта высшего образования. Предназначен для студентов, обучающихся по укрупненной группе специальностей и направлений подготовки высшего образования «Экономика и управление», изучающих дисциплину «Бухгалтерский учет».
Compressible or incompressible blend of interacting monodisperse star and linear polymers near a surface
Creators: name: Batman, Richard
name: Gujrati, P. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a lattice model of a mixture of repulsive, attractive, or neutral monodisperse star (species A) and linear (species B) polymers with a third monomeric species C, which may represent free volume. The mixture is next to a hard, infinite plate whose interactions with A and C can be attractive, repulsive, or neutral. These two interactions are the only parameters necessary to specify the effect of the surface on all three components. We numerically study monomer density profiles using the method of Gujrati and Chhajer that has already been previously applied to study polydisperse and monodisperse linear-linear blends next to surfaces. The resulting density profiles always show an enrichment of linear polymers in the immediate vicinity of the surface, due to entropic repulsion of the star core. However, the integrated surface excess of star monomers is sometimes positive, indicating an overall enrichment of stars. This excess increases with the number of star arms only up to a certain critical number and decreases thereafter. The critical arm number increases with compressibility (bulk concentration of C). The method of Gujrati and Chhajer is computationally ultrafast and can be carried out on a PC, even in the incompressible case, when simulations are unfeasible. Calculations of density profiles usually take less than 20 minutes on PCs.
description: 42 pages, 8 figures
Hierarchical Hyperedge Embedding-based Representation Learning for Group Recommendation
Creators: name: Guo, Lei
name: Yin, Hongzhi
name: Chen, Tong
name: Zhang, Xiangliang
name: Zheng, Kai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: In this work, we study group recommendation in a particular scenario, namely Occasional Group Recommendation (OGR). Most existing works have addressed OGR by aggregating group members' personal preferences to learn the group representation. However, the representation learning for a group is most complex beyond the fusion of group member representation, as the personal preferences and group preferences may be in different spaces. In addition, the learned user representation is not accurate due to the sparsity of users' interaction data. Moreover, the group similarity in terms of common group members has been overlooked, which however has the great potential to improve the group representation learning. In this work, we focus on addressing the above challenges in group representation learning task, and devise a hierarchical hyperedge embedding-based group recommender, namely HyperGroup. Specifically, we propose to leverage the user-user interactions to alleviate the sparsity issue of user-item interactions, and design a GNN-based representation learning network to enhance the learning of individuals' preferences from their friends' preferences, which provides a solid foundation for learning groups' preferences. To exploit the group similarity to learn a more accurate group representation from highly limited group-item interactions, we connect all groups as a network of overlapping sets, and treat the task of group preference learning as embedding hyperedges in a hypergraph, where an inductive hyperedge embedding method is proposed. To further enhance the group-level preference modeling, we develop a joint training strategy to learn both user-item and group-item interactions in the same process. We conduct extensive experiments on two real-world datasets and the experimental results demonstrate the superiority of our proposed HyperGroup in comparison to the state-of-the-art baselines.
Additional file 2 of TuRLK1, a leucine-rich repeat receptor-like kinase, is indispensable for stripe rust resistance of YrU1 and confers broad resistance to multiple pathogens
Creators: name: Zou, Shenghao
name: Tang, Yansheng
name: Xu, Yang
name: Ji, Jiahao
name: Lu, Yuanyuan
name: Wang, Huanming
name: Li, Qianqian
name: Tang, Dingzhong
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 2. List of primers used in this study.
Sholem Aleichem and Others: Laughing Off the Trauma of History
Creators: name: Roskies, David G.
Publisher: name: Columbia University
Year: 1982
Subjects: Jewish literature
Jews

description: Sholem Aleichem lived just long enough to see his comic muse tested to the limit. As we follow his writings in chronological order, in a time span of escalating violence, we see an ever-growing tension between what is being narrated and the way it is narrated. The greater the pain, the greater the discrepancy. This, strange to say, is the stuff of his humor. By drawing on folk tradition, on concepts of normalcy and on models of communication, Sholem Aleichem perfected an art of the incongruous to take on the vicissitudes of modern times. It was a comic paradigm which could be followed by very few because so few could sustain a vision of human inviolability as the divergence between catas trophe and the tongue became ever more extreme. How Sholem Alei chem trained to walk the tightrope and who it was among the survivors of later cataclysms that followed his precarious lead are the questions that concern us, as we set out to write a garrulous chapter in the modern Jewish literary response to catastrophe.
Population-based study of baseline ethanol consumption and risk of incident essential tremor
Creators: name: Louis, Elan D.
name: Benito-Leon, Julian
name: Bermejo-Pareja, Felix
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Neurosciences
subject: FOS: Clinical medicine

description: Recent postmortem studies have demonstrated pathological changes, including Purkinje cell loss, in the cerebellum in essential tremor (ET). Toxic exposures that compromise cerebellar tissue could lower the threshold for developing ET. Ethanol is a well-established cerebellar toxin, resulting in Purkinje cell loss.
Role of Defect Induced Interfacial States in Molecular Sensing: Ultrahigh- Sensitive Region for Molecular Interaction
Creators: name: Tripathi, Rahul
name: Bhattacharyya, Pritam
name: Shukla, Alok
name: Misra, Abha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The defect induced interfacial states are created in an atomically thin two-dimensional molybdenum disulfide channel by underlying a narrow pattern of a graphene layer in a field effect transistor. Nondestructive method for the generation of charge-state allowed a highly sensitive molecular interaction with the sensitivity of nearly three-order of magnitude at room temperature. The presence of interfacial states in the channel lead to a conductance fluctuation and its magnitude is modulated using the nitrogen dioxide gas molecules in the subthreshold region. The study provides a systematic approach to establish a correlation between modulated conductance fluctuation and the molecular concentration upto parts-per-billion. First-principles density functional theory further explains the role of unique interfacial configuration on conductance fluctuation. Therefore, our study demonstrates an experimental approach to induce charge-state for the modulation of carrier concentration and exploits the role of defect induced interfacial states in atomically thin interfaces for the molecular interaction.
description: 27 pages, 4 figures
Evidence for magnetoplasmon character of the cyclotron resonance response of a two-dimensional electron gas
Creators: name: Faugeras, Clément
name: Martinez, Gérard
name: Riedel, A.
name: Hey, Rudolf
name: Friedland, Klaus-Jurgen
name: Bychkov, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Experimental results on the absolute magneto-transmission of a series of high density, high mobility GaAs quantum wells are compared with the predictions of a recent magnetoplasmon theory for values of the filling factor above 2. We show that the magnetoplasmon picture can explain the non-linear features observed in the magnetic field evolution of the cyclotron resonance energies and of the absorption oscillator strength. This provides experimental evidence that inter Landau level excitations probed by infrared spectroscopy need to be considered as many body excitations in terms of magnetoplasmons: this is especially true when interpreting the oscillator strengths of the cyclotron transitions.
Impacts of Emerging Economies and Firms on International Business: Foreword
Creators: name: Sauvant, Karl P.
Publisher: name: Columbia University
Year: 2012
Subjects: International business enterprises
Economic development
Investments, Foreign
Economics
Business

description: The rise of emerging markets has not only made them more attractive for inward foreign direct investment (FDI) (they account now for more than half of global inward FDI flows) but allowed firms in these countries to become competitive enough to become important players in the global outward FDI market. Unsurprisingly, firms from Brazil, Russia, India, and China (the BRICs countries) play a key role in this process. While this is not a new phenomenon, as a number of firms from emerging markets have long invested abroad, it is only in the past decade that firms based in these economies have become significant outward investors: in 2011, over 30,000 multinational enterprises (MNEs--firms controlling assets abroad) based in emerging markets invested $430 billion abroad, slightly more than a quarter of world FDI outflows. The stock of this investment now amounts to nearly $4 trillion-a substantial amount.