cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Analysis of the response and the rainfall distribution in a mountainous watershed
Creators: name: Loukas, Athanasios
Publisher: name: University of British Columbia
Year: 2010

description: The hydrologic response of a small, steep and forested watershed is investigated with the use of a simplified watershed model. The watershed model utilises the linear storage routing technique and treats the runoff as fast and slow. The separation of the rainfall input to each of the components of runoff is achieved with the use of a non-linear exponential equation (Eq. 3.1). Hourly rainfall data averaged from five raingauges and hourly streamflow are used as input to the model. The model is found to perform well. Analysis of the variation of model parameters and the resulting linear form of the rainfall separation equation (Eq. 5.1), after the application of the model, indicates that the hydrologic response of the watersed is reasonably linear except for intense summer rainstorms under dry soil conditions. The linearity of the response of the watershed can be attributed to the runoff generation mechanism which is the subsurface pipeflow. Studies of the dynamics of pipeflow are reviewed and validated for the study watershed and it is shown that the parameters of the model take values that are consistent with their physical representation. Reviewing the literature, it has been recognized that the rainfall distribution with elevation is different from linear for mountainous areas with humid climate. Analysis of the rainfall distribution in the study watershed reveals that the linear increase of precipitation with elevation is not valid for rainfall. The rainfall depth per event increases up to the mid-elevation and then decreases at the upper elevations. Furthermore, the hourly intensity decreases with height and the two dominant hillslopes do not receive the same amount of rain. This variation in rainfall is explained by meteorological precesses and the physiographic features of the watershed. The performance of the model is highly affected by the accuracy and representativeness of the rainfall data. For example if weighted averages of several precipitation stations are used, the model performs well. However, if only a single point rainfall is used, the model performance becomes less good. As a result, unless the rainfall and runoff are known with great precision, it is difficult to make an accurate determination of the storage characteristics of the basin, and consequently it is argued that it may not be possible to distinguish between the accuracy of different routing models.
Micromagnetic study of a spin-torque oscillator based on a magnetic nano-contact magnetized at an arbitrary angle
Creators: name: Consolo, G.
name: Azzerboni, B.
name: Lopez-Diaz, L.
name: Gerhart, G.
name: Bankowski, E.
name: Tiberkevich, V.
name: Slavin, A. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The nature of spin wave modes excited by spin-polarized direct current in a spin-torque auto-oscillator based on a magnetic nanocontact was studied by a micromagnetic simulation in the case when the external bias magnetic field was rotated from the in-plane to perpendicular-to-plane orientation. In qualitative agreement with the weakly-nonlinear analytical theory it was found, that at a certain critical angle, an abrupt switching from the self-localized nonlinear "bullet" mode to a propagating quasi-linear Slonczewski mode takes place, and is accompanied by an upward jump in generated microwave frequency. It was, also, found that the analytical theory overestimates the magnitude of a critical magnetization angle, corresponding to the mode switching, and that the magnitude of the frequency jump caused by the mode switching is inversely proportional to the nanocontact radius.
description: 27 pages, 5 figure, paper submitted to Physical Review B
transcriptome analysis of Oreolalax rhodostigmatus
Creators: name: 卢宁宁(Ningning Lu)
Publisher: name: CNGB
Year: 2025
Subjects: Raw sequence reads
Transcriptome or Gene expression
Multiisolate

description: Transcriptome sequencing was performed on several tissues of tadpoles at different developmental stages to analyze the molecular genetic mechanism of their cave adaptation during development.
Additional file 1 of Continue or not to continue? Attitudes towards deprescribing among community-dwelling older adults in China
Creators: name: Tan, Jie
name: Wang, MinHong
name: Pei, XiaoRui
name: Sun, Quan
name: Lu, ChongJun
name: Wang, Ying
name: Zhang, Li
name: Wu, Chenkai
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Additional file 1: Supplement Table 1.Comparison between included and excluded participants. Supplement Table 2. Adjusted associationsbetween older adults’ demographic and clinical characteristics and theirattitudes toward deprescribing. Supplementary Table 3.STrengthening the Reporting of OBservational studies in Epidemiology (STROBE)checklist for cross-sectional studies.
Overview of the PHENIX spin program
Creators: name: Kim, Chong
Publisher: name: Zenodo
Year: 2021
Subjects: icnfp19
phenix
spin
polarization
transverse spin asymmetry
longitudinal spin asymmetry
p+p
vtx
fvtx
gluon
hadron
π0
p+al
p+au
forward-rapidity
mid-rapidity
J/Ψ
neutron
zdc

description: Talk presented at the International Conference on New Frontiers in Physics 2019 conference
Polymer translocation into cavities: Effects of confinement geometry, crowding and bending rigidity on the free energy
Creators: name: Polson, James M.
name: Heckbert, David R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Monte Carlo simulations are used to study the translocation of a polymer into a cavity. Modeling the polymer as a hard-sphere chain with a length up to N=601 monomers, we use a multiple-histogram method to measure the variation of the conformational free energy of the polymer with respect to the number of translocated monomers. The resulting free-energy functions are then used to obtain the confinement free energy for the translocated portion of the polymer. We characterize the confinement free energy for a flexible polymer in cavities with constant cross-sectional area A for various cavity shapes (cylindrical, rectangular and triangular) as well as for tapered cavities with pyramidal and conical shape. The scaling of the free energy with cavity volume and translocated polymer subchain length is generally consistent with predictions from simple scaling arguments, with small deviations in the scaling exponents likely due to finite-size effects. The confinement free energy depends strongly on cavity shape anisometry and is a minimum for an isometric cavity shape with a length/width ratio of unity. For translocation into infinitely long cones, the scaling of the free energy with taper angle is consistent with a theoretical prediction employing the blob model. We also examine the effects of polymer bending rigidity on the translocation free energy for cylindrical cavities. For isometric cavities, the observed scaling behaviour is in partial agreement with theoretical predictions. In addition, translocation into highly anisometric cylindrical cavities leads to a multi-stage folding process for stiff polymers. Finally, we examine the effects of crowding agents inside the cavity. We find that the confinement free energy increases with crowder density. At constant packing fraction the magnitude of this effect lessens with increasing crowder size for crowder/monomer size ratio$\geq$ 1.
description: 16 pages, 13 figures
[Northern Pomo field notes]
Creators: name: Guerrero, Edna
name: Vihman, Eero
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015
Subjects: subject: pej
subject: Northern Pomo language

description: Northern Pomo field notebook labeled "1 EG 1": vocabulary and texts with titles "Bear and Deer Woman" and "Creation of fish and Clear Lake".
On High-Dimensional Constrained Maximum Likelihood Inference
Creators: name: Zhu, Yunzhang
name: Shen, Xiaotong
name: Pan, Wei
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy

description: Inference in a high-dimensional situation may involve regularization of a certain form to treat overparameterization, imposing challenges to inference. The common practice of inference uses either a regularized model, as in inference after model selection, or bias-reduction known as “debias.” While the first ignores statistical uncertainty inherent in regularization, the second reduces the bias inbred in regularization at the expense of increased variance. In this article, we propose a constrained maximum likelihood method for hypothesis testing involving unspecific nuisance parameters, with a focus of alleviating the impact of regularization on inference. Particularly, for general composite hypotheses, we unregularize hypothesized parameters whereas regularizing nuisance parameters through a L0-constraint controlling the degree of sparseness. This approach is analogous to semiparametric likelihood inference in a high-dimensional situation. On this ground, for the Gaussian graphical model and linear regression, we derive conditions under which the asymptotic distribution of the constrained likelihood ratio is established, permitting parameter dimension increasing with the sample size. Interestingly, the corresponding limiting distribution is the chi-square or normal, depending on if the co-dimension of a test is finite or increases with the sample size, leading to asymptotic similar tests. This goes beyond the classical Wilks phenomenon. Numerically, we demonstrate that the proposed method performs well against it competitors in various scenarios. Finally, we apply the proposed method to infer linkages in brain network analysis based on MRI data, to contrast Alzheimer’s disease patients against healthy subjects. Supplementary materials for this article are available online.
Continuous spectral decompositions of Abelian group actions on C*-algebras
Creators: name: Buss, Alcides
name: Meyer, Ralf
Publisher: name: arXiv
Year: 2007
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L55 (22D25 46L08 46L45)

description: Let G be a locally compact Abelian group. Following Ruy Exel, we view Fell bundles over the Pontrjagin dual of G as continuous spectral decompositions of G-actions on C*-algebras. We classify such spectral decompositions using certain dense subspaces related to Marc Rieffel's theory of square-integrability. There is a unique continuous spectral decomposition if the group acts properly on the primitive ideal space of the C*-algebra. But there are also examples of group actions without or with several inequivalent spectral decompositions.
description: 34 pages
Crossing the phantom barrier with purely kinetic multiple k-essence
Creators: name: Chimento, Luis P.
name: Lazkoz, Ruth
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We consider multiple k-essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k-essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the geometry and the k-fields. The models thus obtained have accelerated expansion at late cosmic time, representing universes ending at a finite time with a big rip singularity. In addition, these models begin to evolve from an initial singularity, so they have a finite time span.
description: 5 pages, revtex
Additional file 3 of A single nucleotide substitution at the 3′-end of SBPase gene involved in Calvin cycle severely affects plant growth and grain yield in rice
Creators: name: Li, Chun
name: Li, Na
name: Huang, Rui
name: Chen, Congping
name: Guo, Jia
name: Yang, Xiaorong
name: Zhang, Xiangyu
name: Sun, Changhui
name: Deng, Xiaojian
name: Wang, Pingrong
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 3: Figure S2. Expression pattern of the OsSBPase gene by semiquantitative analysis (two replications in a gel). R: Root, S: Stem, L: Leaf blade, LS: leaf sheath, P: young panicle.
Dirac and Normal Fermions in Graphite and Graphene: Implications to the Quantum Hall Effect
Creators: name: Luk'yanchuk, Igor A.
name: Kopelevich, Yakov
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Spectral analysis of Shubnikov de Haas (SdH) oscillations of magnetoresistance and of Quantum Hall Effect (QHE) measured in quasi-2D highly oriented pyrolytic graphite (HOPG) [Phys. Rev. Lett. 90, 156402 (2003)] reveals two types of carriers: normal (massive) electrons with Berry phase 0 and Dirac-like (massless) holes with Berry phase pi. We demonstrate that recently reported integer- and semi-integer QHE for bi-layer and single-layer graphenes take place simultaneously in HOPG samples.
description: 4 pages
Assessing the Success and Challenges of the Manual Vehicle Logging System on Fleet Management: A case study of the Ghana Civil service.
Creators: name: KORANTENG, SAMUEL NYARKO
Publisher: name: figshare
Year: 2022
Subjects: subject: 150309 Logistics and Supply Chain Management
subject: FOS: Economics and business
subject: 150799 Transportation and Freight Services not elsewhere classified

description: ABSTRACT The effective management of fleet (vehicles) is critical to the success of any organization and its stakeholders. Companies employing the use of fleet are on the rise and effective management is necessary for their success. In light of the present-day modernization, many organizations have developed transportation services. These organizations need to have proper management of their fleet in terms of location tracking, speeding control, range control, fuel management, and mileage in order to provide proper services and in the long run, be cost effective. Thus, having an effective fleet management system is critical in effectively managing the operations of tracking and management of the various fleets available to companies. This study therefore explored the manual vehicle logging system employed by organizations in fleet management, using the Ghana Civil Service as a case study. The study employed a quantitative design using a descriptive cross-sectional survey approach where One Hundred and Fifteen (115) drivers and transport supervisors responded to the questionnaire. Descriptive and correlation analysis was conducted using Statistical Package for the Social Sciences (SPSS) to describe the demographic characteristics and explain the relationship between the designation of respondents and the systems effectiveness. Among the findings, the study discovered that, the manual logging system offers quality results that can be relied on for decision making, thus, leading to improved efficiency in service delivery at the Ghana Civil Service. However, users frequently encounter errors in the course of using the book, and these errors encountered by the users affects the accuracy of data interpretations for appropriate managerial decisions on fleet management. The study therefore recommends a migration onto the digital platform among others.
Extra $Z$ bosons and low-energy tests of unification
Creators: name: Barr, S. M.
name: Khan, Almas
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If there is an extra U(1) gauge symmetry broken at low energies, then it may be possible from the charges of the known quarks and leptons under this U(1) to make inferences about how much gauge unification occurs at high scales and about the unification group. (For instance, there are certain observed properties of an extra $U(1)'$ that would be inconsistent with unification in four dimensions at high scales.) A general analysis is presented. Two criteria used in this analysis are (1) the degree to which the generator of the extra U(1) mixes with hypercharge, and (2) the ratio of the extra U(1) charge of the "10" and the "$\bar{5}$" of quarks and leptons.
description: 27 pages, LaTex, no figures. Changed content. References added. Typos corrected
Additional file 1 of Genome-wide association mapping reveals novel genes associated with coleoptile length in a worldwide collection of barley
Creators: name: Luo, Hao
name: Hill, Camilla Beate
name: Zhou, Gaofeng
name: Zhang, Xiao-Qi
name: Li, Chengdao
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1 Figure S1. Diversity of barley varieties. a) The geographic distribution of barley accessions. Numbers above the bars showed the varieties numbers from each geographical origin. b) Row type and c) growth habit in barley accessions. Numbers on the top of the bars showed the varieties numbers in different row-types and life forms.
National Trust Arts, Buildings & Collections Bulletin, Spring 2018
Creators: name: National Trust
Publisher: name: National Trust
Year: 2018
Subjects: art
Girl with a Chaffinch
buildings
Curation
Arlington Court
Saltram
Hughenden
Cliveden
Ightham Mote
architecture
Dunham Massey
Mount Stewart

description: The Arts, Buildings & Collections (ABC) Bulletin was published between 2006 and 2022, aimed at external readers with an interest in conservation and curatorial work. ABC was distributed in PDF format as an email attachment to direct subscribers, relevant National Trust staff and volunteers, and was available to download from the Trust website. Each issue was around 35 pages, colour-illustrated, with around five scholarly articles and three shorter features covering NT exhibitions and events, new publications, conservation news, acquisitions, loans, etc. Publication continued until 2022, when the Bulletin was replaced by the Cultural Heritage Magazine.
description: Swindon, UK
Field Equations and Conservation Laws Derived from the Generalized Einstein Lagrangian Density for A Gravitational System and Their Implications to Cosmology
Creators: name: Chen, Fang-Pei
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Based on investigations of the fundamental properties of the generalized Einstein Lagrangian density for a gravitational system, the theoretical foundations of the modified Einstein field equations and the Lorentz and Levi-Civita conservation laws are systematically studied. The theory of cosmology developed on the basis of these equations and laws is analyzed in detail. Some new properties and new effects of the cosmos are deduced; these new properties and new effects could be tested via future experiments and observations.
description: 25 pages, no figure, accepted by International Journal of Theoretical Physics
Phase transitions of Large-N two-dimensional Yang-Mills and generalized Yang-Mills theories in the double scaling limit
Creators: name: Alimohammadi, M.
name: Khorrami, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The large-N behavior of Yang-Mills and generalized Yang-Mills theories in the double-scaling limit is investigated. By the double-scaling limit, it is meant that the area of the manifold on which the theory is defined, is itself a function of N. It is shown that phase transitions of different orders occur, depending on the functional dependence of the area on N. The finite-size scalings of the system are also investigated. Specifically, the dependence of the dominant representation on A, for large but finite N is determined.
description: 11 pages, to appear in Eur. Phys. J. C
On Irreversibility, Dissipation and Response Theory
Creators: name: Evans, Denis J.
name: Searles, Debra J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Recently there has been considerable interest in the Fluctuation Theorem (FT). The FT shows how time reversible microscopic dynamics leads to irreversible macroscopic behavior as the system size or observation time increases. We show that the argument of the Evans-Searles FT, the dissipation function, plays a central role in nonlinear response theory and derive the Dissipation Theorem, giving exact relations for nonlinear response of classical N-body systems. These expressions should be verifiable experimentally. When linearized they reduce to the Green-Kubo expressions for linear response.
description: 14 pages
An expert systems approach to cost estimation for steel structures using stochastic methods
Creators: name: Watson, Andrew Donald
Publisher: name: University of British Columbia
Year: 2010

description: Cost information is important to all parties in the steel fabrication industry: owners; engineers; and fabricators. The industry is driven by economic forces that encourage the efficient use of material, labour and equipment making cost estimation a vital tool in every decision. Unfortunately, these same forces hinder accurate estimation by imposing economic constraints that reduce the amount of time, effort and money that can be committed to the process; therefore, the development of new and improved cost estimation methods is encouraged. This thesis attempts to demonstrate the feasibility of applying expert systems technology as a means of estimating the fabrication cost of steel structures. It considers the historical factors limiting current methods of cost estimation and the strengths and weaknesses of computer technology in order to develop a new method of cost estimation that provides valuable information which is impractical to obtain using traditional methods. It introduces the concept of stochastic estimation which may be used to evaluate the variability of costs and assess accuracy. The new method is designed for efficient use of computer capabilities and is intended for development as a tool to aid engineers, estimators and fabricators. Current methods of cost estimation are unsuitable for application in an expert system because they rely heavily on subjective judgement and are bound by constraints imposed by the burden of manual calculation. These constraints are no longer valid now that the industry has access to powerful personal computers that are capable of performing sophisticated calculations and manipulating large amounts of data. The introduction of expert systems technology has provided an opportunity to examine traditional cost estimation methods and to propose new methods that are better suited for use in a computer-based environment. The development of the new estimation method and its implementation as an expert system promises many benefits to the steel design and fabrication industries. It focuses the power of computer technology on the estimation problem. It provides greater access to accurate estimation, thereby improving the basis of important economic decisions. It can also be an important tool for the training of new cost estimators and allows the efforts of experienced personnel to be directed into more profitable areas. Moreover, an estimate derived by an expert system is consistent and unbiased making it better suited for comparison than one compiled by human estimators who may be influenced by personal preferences and external factors.
National Trust Arts, Buildings & Collections Bulletin, Autumn 2019
Creators: name: National Trust
Publisher: name: National Trust
Year: 2019
Subjects: art
myth
collections
Dorothy Johnston
Knole
conservation
oral history
Cliveden
Rembrandt
Kedleston
Curation
Clumber Park
architecture

description: The Arts, Buildings & Collections (ABC) Bulletin was published between 2006 and 2022, aimed at external readers with an interest in conservation and curatorial work. ABC was distributed in PDF format as an email attachment to direct subscribers, relevant National Trust staff and volunteers, and was available to download from the Trust website. Each issue was around 35 pages, colour-illustrated, with around five scholarly articles and three shorter features covering NT exhibitions and events, new publications, conservation news, acquisitions, loans, etc. Publication continued until 2022, when the Bulletin was replaced by the Cultural Heritage Magazine.
description: Swindon, UK
Investigating QCD matter with PHENIX at RHIC - with special focus on small systems
Creators: name: Csanad, Mate
Publisher: name: Zenodo
Year: 2021
Subjects: icnfp19
phenix
raa
jet
photon
flow
scaling
thermal photon
direct photon
small systems
forward-rapidity
mid-rapidity
backward-rapidity
multiplicity

description: Talk presented at the International Workshop on Nucleon Structure at Large Bjorken x conference (overlapping with ICNFP 2019)
On the well-posedness of the spatially homogeneous Boltzmann equation with a moderate angular singularity
Creators: name: Fournier, Nicolas
name: Mouhot, Clément
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 76P05

description: We prove an inequality on the Kantorovich-Rubinstein distance --which can be seen as a particular case of a Wasserstein metric-- between two solutions of the spatially homogeneous Boltzmann equation without angular cutoff, but with a moderate angular singularity. Our method is in the spirit of [7]. We deduce some well-posedness and stability results in the physically relevant cases of hard and moderately soft potentials. In the case of hard potentials, we relax the regularity assumption of [6], but we need stronger assumptions on the tail of the distribution (namely some exponential decay). We thus obtain the first uniqueness result for measure initial data. In the case of moderately soft potentials, we prove existence and uniqueness assuming only that the initial datum has finite energy and entropy (for very moderately soft potentials), plus sometimes an additionnal moment condition. We thus improve significantly on all previous results, where weighted Sobolev spaces were involved.
description: 26 p
On high-dimensional constrained maximum likelihood inference*
Creators: name: Zhu, Yunzhang
name: Shen, Xiaotong
name: Pan, Wei
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Mathematical Sciences not elsewhere classified
subject: Science Policy

description: Inference in a high-dimensional situation may involve regularization of a certain form to treat overparameterization, imposing challenges to inference. The common practice of inference uses either a regularized model, as in inference after model selection, or bias-reduction known as “debias”. While the first ignores statistical uncertainty inherent in regularization, the second reduces the bias inbred in regularization at the expense of increased variance. In this paper, we propose a constrained maximum likelihood method for hypothesis testing involving unspecific nuisance parameters, with a focus of alleviating the impact of regularization on inference. Particularly, for general composite hypotheses, we unregularize hypothesized parameters whereas regularizing nuisance parameters through a L0-constraint controlling the degree of sparseness. This approach is analogous to semiparametric likelihood inference in a high-dimensional situation. On this ground, for the Gaussian graphical model and linear regression, we derive conditions under which the asymptotic distribution of the constrained likelihood ratio is established, permitting parameter dimension increasing with the sample size. Interestingly, the corresponding limiting distribution is the chi-square or normal, depending on if the co-dimension of a test is finite or increases with the sample size, leading to asymptotic similar tests. This goes beyond the classical Wilks phenomenon. Numerically, we demonstrate that the proposed method performs well against it competitors in various scenarios. Finally, we apply the proposed method to infer linkages in brain network analysis based on MRI data, to contrast Alzheimer's disease patients against healthy subjects.
Towards the Event Horizon - High Resolution VLBI Imaging of Nuclei of Active Galaxies
Creators: name: Krichbaum, T. P.
name: Graham, D. A.
name: Witzel, A.
name: Zensus, J. A.
name: Greve, A.
name: Grewing, M.
name: Bremer, M.
name: Doeleman, S.
name: Phillips, R. B.
name: Rogers, A. E. E.
name: Fagg, H.
name: Strittmatter, P.
name: Ziurys, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on new developments in VLBI, with emphasis on experiments performed at the highest frequencies possible to date (so called mm-VLBI). We have observed the nucleus of M 87 (Virgo A) with global VLBI at 3 mm. We show a new image of the inner-most jet region with an angular resolution of approx. 300 x 60 micro-arcseconds. In terms of Schwarzschild radii, this leads to an upper limit of the jet base of approx. 100 x 20 Schwarzschild radii. We also report on two VLBI pilot-experiments, which demonstrate the technical feasibility of global VLBI at 150 and 230 GHz (2 mm and 1.3 mm). The experiments lead to upper limits to the size of the unresolved AGN-cores in the 25 - 30 micro-arcsecond range. The participation of new and near-future mm-telescopes (like APEX, CARMA, SMA, LMT, ALMA, etc.) in global mm-VLBI will provide the necessary sensitivity for the imaging of black holes and their immediate environment.
description: To appear in the conference proceedings "Exploring the Cosmic Frontier: Astrophysical Instruments for the 21st Century", held in Berlin, Germany, May 17 - 21, 2004, ESO Astrophysical Symposia Series, in press. Paper contains 2 pages, 1 figure
Bulk reconstruction of metrics inside black holes by complexity
Creators: name: Hashimoto, Koji
name: Watanabe, Ryota
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We provide a formula to reconstruct bulk spacetime metrics inside black holes by the time dependence of complexity in the dual quantum field theory, based on the complexity=volume (CV) conjecture in the holographic duality.
description: 22 pages, 2 figures
Catastrophe observation in a Josephson junction system
Creators: name: Castellano, M. G.
name: Chiarello, F.
name: Leoni, R.
name: Mattioli, F.
name: Torrioli, G.
name: Carelli, P.
name: Cirillo, M.
name: Cosmelli, C.
name: de Waard, A.
name: Frossati, G.
name: Grønbech-Jensen, N.
name: Poletto, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report on a direct quantitative comparison between Thom's general catastrophe theory for systems presenting discontinuous behavior and experimental reality. It is demonstrated that the model provides a striking quantitative description of the measured experimental features of the complex nonlinear system generating the most appealing class of sensors and devices nowadays used in experiments, namely the Superconducting Quantum Interference Devices (SQUIDs). The parameter space of the SQUID system that we investigate displays all the features associated with a butterfly catastrophe, namely a catastrophe expected for a system having four control parameters and one state variable.
description: 13 figures in A4 pdf format including three figures. Article submitted for publication
The Influence of Social Networks on Human Society
Creators: name: Arya, Shreyash
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: This report gives a brief overview of the origin of social networks and their most popular manifestation in the modern era - the Online Social Networks (OSNs) or social media. It further discusses the positive and negative implications of OSNs on human society. The coupling of Data Science and social media (social media mining) is then put forward as a powerful tool to overcome the current challenges and pave the path for futuristic advancements
On Primes Represented by Quadratic Polynomials
Creators: name: Baier, Stephan
name: Zhao, Liangyi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11L07, 11L20, 11L40, 11N13, 11N32, 11N37

description: This is a survey article on the Hardy-Littlewood conjecture about primes in quadratic progressions. We recount the history and quote some results approximating this hitherto unresolved conjecture.
description: six(6) pages, minor changes were made
Cross section and polarization observables for the reaction $e^++e^-\to a_1(1260)+π$
Creators: name: Tomasi-Gustafsson, E.
name: Gakh, G. I.
name: Adamuščín, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A model independent formalism for the electron positron annihilation reaction $e^++e^-\to a_1(1260)+π$ has been derived. The differential and total cross sections and the elements of the spin--density matrix of the $a_1$-meson were calculated in terms of the electromagnetic form factors of the corresponding $γ^*a_1π$ current. Simple models of $a_1$ form factors have been fitted to the available cross section data and they allow to give numerical predictions for the different observables.
description: 19 pages, 6 figures Added formulas for axial meson decay in 3 pions Modified version to appear in PRC
Solution for the BFKL Pomeron Calculus in zero transverse dimensions
Creators: name: Kozlov, M.
name: Levin, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper the exact analytical solution is found for the BFKL Pomeron calculus in zero transverse dimensions, in which all Pomeron loops have been included. The comparison with the approximate methods of the solution is given, and the kinematic regions are discussed where they describe the behaviour of the scattering amplitude quite well. In particular, the semi-classical approach is considered, which reproduces the main properties of the exact solution at large values of rapidity ($Y \geq 10$). It is shown that the mean field approximation leads to a good description of the scattering amplitude only if the amplitude at low energy is rather large. However, even in this case, it does not lead to the correct asymptotic behaviour of the scattering amplitude at high energies.
description: 37 pages,19 figures and one table, the revised version
PHENIX / STAR Nucleon Spin Highlights
Creators: name: Kim, Chong
Publisher: name: Zenodo
Year: 2021
Subjects: icnfp19
phenix
star
spin
gluon
p+p
longitudinal spin asymmetry
transverse spin asymmetry
helicity
jet
hadron
π0

description: Talk presented at the International Workshop on Nucleon Structure at Large Bjorken x 2019 (overlapping with ICNFP 2019)
End-to-end Neural Diarization: From Transformer to Conformer
Creators: name: Liu, Yi Chieh
name: Han, Eunjung
name: Lee, Chul
name: Stolcke, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We propose a new end-to-end neural diarization (EEND) system that is based on Conformer, a recently proposed neural architecture that combines convolutional mappings and Transformer to model both local and global dependencies in speech. We first show that data augmentation and convolutional subsampling layers enhance the original self-attentive EEND in the Transformer-based EEND, and then Conformer gives an additional gain over the Transformer-based EEND. However, we notice that the Conformer-based EEND does not generalize as well from simulated to real conversation data as the Transformer-based model. This leads us to quantify the mismatch between simulated data and real speaker behavior in terms of temporal statistics reflecting turn-taking between speakers, and investigate its correlation with diarization error. By mixing simulated and real data in EEND training, we mitigate the mismatch further, with Conformer-based EEND achieving 24% error reduction over the baseline SA-EEND system, and 10% improvement over the best augmented Transformer-based system, on two-speaker CALLHOME data.
description: To appear in Interspeech 2021
Correlation between Leptonic CP Violation and mu-tau Symmetry Breaking
Creators: name: Baba, Teppei
name: Yasue, Masaki
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Considering the $μ$-$τ$ symmetry, we discuss a direct linkage between phases of flavor neutrino masses and leptonic CP violation by determining three eigenvectors associated with ${\rm\bf M}=M^\dagger_νM_ν$ for a complex flavor neutrino mass matrix $M_ν$ in the flavor basis. Since the Dirac CP violation is absent in the $μ$-$τ$ symmetric limit, leptonic CP violation is sensitive to the $μ$-$τ$ symmetry breaking, whose effect can be evaluated by perturbation. It is found that the Dirac phase ($δ$) arises from the $μ$-$τ$ symmetry breaking part of ${\rm\bf M}_{eμ,eτ}$ and an additional phase ($ρ$) is associated with the $μ$-$τ$ symmetric part of ${\rm\bf M}_{eμ,eτ}$, where ${\rm\bf M}_{ij}$ stands for an $ij$ matrix element ($i,j$=$e,μ,τ$). The phase $ρ$ is redundant and can be removed but leaves its effect in the Dirac CP violation characterized by $\sin (δ+ ρ)$. The perturbative results suggest the exact formula of mixing parameters including that of $δ$ and $ρ$, which turns out to be free from the effects of the redundant phases. As a result, it is generally shown that the maximal atmospheric neutrino mixing necessarily accompanies either $\sinθ_{13}=0$ or $\cos(δ+ρ)=0$, the latter of which indicates maximal CP violation, where $θ_{13}$ is the $ν_e$-$ν_τ$ mixing angle.
description: 16 pages, ReVTeX, references updated, typos corredcted, published version in Physical Reviews D
Limbah industri mungkin bukan satu-satunya sumber pencemaran air
Creators: name: Irawan, Dasapta Erwin
Publisher: name: Zenodo
Year: 2021
Subjects: limbah industri
limbah domestik
industrial wastes
domestic waste
pencemaran air
water contamination
hidrogeologi kontaminan
contaminant hydrogeology
interaksi air tanah dan air sungai
groundwater and river water interactions

description: Visit this website for more infos: https://geologi.fitb.itb.ac.id/2021/02/18/limbah-industri-mungkin-bukan-sumber-pencemar-air-satu-satunya/
Heat kernel transform for nilmanifolds associated to the Heisenberg group
Creators: name: Kroetz, B.
name: Thangavelu, S.
name: Xu, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We study the heat kernel transform on a nilmanifold $ M $ of the Heisenberg group. We show that the image of $ L^2(M) $ under this transform is a direct sum of weighted Bergman spaces which are related to twisted Bergman and Hermite-Bergman spaces.
description: Revised version; to appear in Revista Mathematica Iberoamericana, 28 p
Negative Entanglement Measure, and What It Implies
Creators: name: Yu, Ting
name: Eberly, J. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we extract from concurrence its variable part, denoted $Λ$, and use $Λ$ as a time-dependent measure of "distance", either postive or negative, from the separability boundary. We use it to investigate entanglement dynamics of two isolated but initially entangled qubits, each coupled to its own environment.
description: 4 pages, 5 figures, submitted to Special Issue in Journal of Modern Optics in honor of Peter Knight
Dressing chain for the acoustic spectral problem
Creators: name: Adler, V. E.
name: Shabat, A. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: The iterations are studied of the Darboux transformation for the generalized Schroedinger operator. The applications to the Dym and Camassa-Holm equations are considered.
description: 16 pages, 6 eps figures
Magnetic order of tetragonal CuO ultra-thin films
Creators: name: Hernandez, N. Ortiz
name: Salman, Z.
name: Prokscha, T.
name: Suter, A.
name: Mardegan, J. R. L.
name: Moser, S.
name: Zakharova, A.
name: Piamonteze, C.
name: Staub, und U.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a detailed low-energy muon spin rotation and x-ray magnetic circular dichroism (XMCD) investigation of the magnetic structure in ultra-thin tetragonal (T)-CuO films. The measured muon-spin polarization decay indicates an antiferromagnetic (AFM) order with a transition temperature higher than 200K. The XMCD signal obtained around the Cu $L_{2,3}$ edges indicates the presence of pinned Cu$^{2+}$ moments that are parallel to the sample surface, and additionally, isotropic paramagnetic moments. The pinning of some of the Cu moments is caused by an AFM ordering consisting of moments that lie most likely in the plane of the film. Moreover, pinned moments show a larger orbital magnetic moment contribution with an approximate ratio of $m_{orb}/m_{spin} = 2$, indicating that these spins are located at sites with reduced symmetry. Some fractions of the pinned moments remain pinned from an AFM background even at 360K, indicating that $T_N >$ 360K. A simple model could explain qualitatively these experimental findings; however, it is in contrast to theoretical predictions, showing that the magnetic properties of ultra-thin T-CuO films differ from bulk expectations and is more complex.
description: 11 Figures
Oferta pública de educação superior no estado da Bahia
Creators: name: Mota Júnior, Antônio de Macêdo
name: Fialho, Nadia Hage
Publisher: name: figshare
Year: 2021
Subjects: subject: 130103 Higher Education
subject: FOS: Educational sciences

description: Este estudo exploratório, bibliográfico e documental aborda o tema da oferta pública de educação superior no Estado da Bahia, com o intuito de contextualizar historicamente e caracterizar aspectos atuais dessa oferta. Os resultados apontaram que, mesmo com a expansão federal, nos últimos anos, com novas universidades e institutos federais, as universidades estaduais da Bahia ainda mantêm sua relevância na interiorização da oferta pública de educação superior no Estado.
Automated Deep Learning-Based Approach for Pavement Crack Detection Using an Inexpensive Global Shutter RGB-D Sensor and Raspberry Pi Computer
Creators: name: Pouria Asadi
Publisher: name: figshare
Year: 2021
Subjects: subject: 90599 Civil Engineering not elsewhere classified
subject: FOS: Civil engineering

description: Pavement distress assessment is a significant step for pavement management. Automated pavement crack detection is a challenging task that has been researched for decades due to the complicated pavement conditions. Current pavement condition–assessment procedures are extensively time consuming, expensive, and labor-intensive. The primary goal of this paper is to develop a cost-effective and reliable platform using an RGB-D sensor and deep learning detection models for automated pavement crack detection on a single-board ARM-based computer.
Quantized Corrupted Sensing with Random Dithering
Creators: name: Sun, Zhongxing
name: Cui, Wei
name: Liu, Yulong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Corrupted sensing concerns the problem of recovering a high-dimensional structured signal from a collection of measurements that are contaminated by unknown structured corruption and unstructured noise. In the case of linear measurements, the recovery performance of different convex programming procedures (e.g., generalized Lasso and its variants) is well established in the literature. However, in practical applications of digital signal processing, the quantization process is inevitable, which often leads to non-linear measurements. This paper is devoted to studying corrupted sensing under quantized measurements. Specifically, we demonstrate that, with the aid of uniform dithering, both constrained and unconstrained Lassos are able to recover signal and corruption from the quantized samples when the measurement matrix is sub-Gaussian. Our theoretical results reveal the role of quantization resolution in the recovery performance of Lassos. Numerical experiments are provided to confirm our theoretical results.
description: 13 pages, 19 figures
Method for Full Bloch-Sphere Control of a Localized Spin via a Single Electrical Gate
Creators: name: Pingenot, Joseph
name: Pryor, Craig E.
name: Flatté, Michael E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We calculate the dependence on an applied electric field of the g tensor of a single electron in a self-assembled InAs/GaAs quantum dot. We identify dot sizes and shapes for which one in-plane component of the g tensor changes sign for realistic electric fields, and show this should permit full Bloch-sphere control of the electron spin in the quantum dot using only a static magnetic field and a single vertical electric gate.
description: 4 pages, 3 figures