cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
УПРАВЛЕНЧЕСКИЕ РЕШЕНИЯ КНР В УСЛОВИЯХ ГЛОБАЛЬНОГО ЗАРАЖЕНИЯ СOVID-19
Creators: name: ВАРФАЛОВСКАЯ Розалия Александровна
name: ВАРФАЛОВСКИЙ Александр Владимирович
Publisher: name: Образование и право
Year: 2020
Subjects: эпидемия
COVID-19
сотрудничество
здравоохранение
лекарства
мероприятия
социально-экономический план
общество умеренного и хорошего достатка.

description: РФ и КНР участвуют и сотрудничают в различных природных вызовах, борясь с этими конфронтациями. Россия, самый крупный сосед КНР, в ответ на вспышку коронавируса предложила ей объединить усилия в борьбе с новым вирусом. Это является шагом в углублении экономического, гуманитарного, научно-техническое сотрудничества РФ и КНР. Изучение опыта Китая актуально, так как он первый из всех стран мира сумел грамотно побороть эпидемию и готов помогать другим странам опытом, а также оказать финансовую помощь на 2 млрд. долл. США. Сейчас КНР занимается вопросами восстановления и стабилизации. Цель статьи: изучить собственный опыт, а также опыт сотрудничества Китая с другими странами для скорейшего преодоления эпидемии, как в РФ, так и в других дружественных странах, с которыми Китай имеет единую транспортную инфраструктуру, например страны «Одного пояса одного пути» и ЕС.
Vectorization of Gradient Boosting of Decision Trees Prediction in the CatBoost Library for RISC-V Processors
Creators: name: Kozinov, Evgeny
name: Vasiliev, Evgeny
name: Gorshkov, Andrey
name: Kustikova, Valentina
name: Maklaev, Artem
name: Volokitin, Valentin
name: Meyerov, Iosif
Publisher: name: arXiv
Year: 2024
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: The emergence and rapid development of the open RISC-V instruction set architecture opens up new horizons on the way to efficient devices, ranging from existing low-power IoT boards to future high-performance servers. The effective use of RISC-V CPUs requires software optimization for the target platform. In this paper, we focus on the RISC-V-specific optimization of the CatBoost library, one of the widely used implementations of gradient boosting for decision trees. The CatBoost library is deeply optimized for commodity CPUs and GPUs. However, vectorization is required to effectively utilize the resources of RISC-V CPUs with the RVV 0.7.1 vector extension, which cannot be done automatically with a C++ compiler yet. The paper reports on our experience in benchmarking CatBoost on the Lichee Pi 4a, RISC-V-based board, and shows how manual vectorization of computationally intensive loops with intrinsics can speed up the use of decision trees several times, depending on the specific workload. The developed codes are publicly available on GitHub.
Nonlinear steepest descent on a torus: A case study of the Landau-Lifshitz equation
Creators: name: Desiraju, Harini
name: Its, Alexander R.
name: Prokhorov, Andrei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35B40, 35Q15, 35Q51, 35Q60, 37K40, 41A60

description: We obtain rigorous large time asymptotics for the Landau-Lifshitz equation in the soliton free case by extending the nonlinear steepest descent method to genus 1 surfaces. The methods presented in this paper pave the way to a rigorous analysis of other integrable equations on the torus and enable asymptotic analysis on different regimes of the Landau-Lifshitz equation.
description: 49 pages, 9 figures
Magnetorotational collapse of very massive stars to black holes in full general relativity
Creators: name: Liu, Yuk Tung
name: Shapiro, Stuart L.
name: Stephens, Branson C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We perform axisymmetric simulations of the magnetorotational collapse of very massive stars in full general relativity. Our simulations are applicable to the collapse of supermassive stars (M > 10^3M_sun) and to very massive Pop III stars. We model our initial configurations by n=3 polytropes. The ratio of magnetic to rotational kinetic energy in these configurations is chosen to be small (1% and 10%). We find that such magnetic fields do not affect the initial collapse significantly. The core collapses to a black hole, after which black hole excision is employed to continue the evolution long enough for the hole to reach a quasi-stationary state. We find that the black hole mass is M_h = 0.95M and its spin parameter is J_h/M_h^2 = 0.7, with the remaining matter forming a torus around the black hole. We freeze the spacetime metric ("Cowling approximation") and continue to follow the evolution of the torus after the black hole has relaxed to quasi-stationary equilibrium. In the absence of magnetic fields, the torus settles down following ejection of a small amount of matter due to shock heating. When magnetic fields are present, the field lines gradually collimate along the hole's rotation axis. MHD shocks and the MRI generate MHD turbulence in the torus and stochastic accretion onto the central black hole. When the magnetic field is strong, a wind is generated in the torus, and the torus undergoes radial oscillations that drive episodic accretion onto the hole. These oscillations produce long-wavelength gravitational waves potentially detectable by LISA. The final state of the magnetorotational collapse always consists of a central black hole surrounded by a collimated magnetic field and a hot, thick accretion torus. This system is a viable candidate for the central engine of a long-soft gamma-ray burst.
description: 17 pages, 13 figures, replaced with the published version
A Case Study on Sampling Strategies for Evaluating Neural Sequential Item Recommendation Models
Creators: name: Dallmann, Alexander
name: Zoller, Daniel
name: Hotho, Andreas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: At the present time, sequential item recommendation models are compared by calculating metrics on a small item subset (target set) to speed up computation. The target set contains the relevant item and a set of negative items that are sampled from the full item set. Two well-known strategies to sample negative items are uniform random sampling and sampling by popularity to better approximate the item frequency distribution in the dataset. Most recently published papers on sequential item recommendation rely on sampling by popularity to compare the evaluated models. However, recent work has already shown that an evaluation with uniform random sampling may not be consistent with the full ranking, that is, the model ranking obtained by evaluating a metric using the full item set as target set, which raises the question whether the ranking obtained by sampling by popularity is equal to the full ranking. In this work, we re-evaluate current state-of-the-art sequential recommender models from the point of view, whether these sampling strategies have an impact on the final ranking of the models. We therefore train four recently proposed sequential recommendation models on five widely known datasets. For each dataset and model, we employ three evaluation strategies. First, we compute the full model ranking. Then we evaluate all models on a target set sampled by the two different sampling strategies, uniform random sampling and sampling by popularity with the commonly used target set size of 100, compute the model ranking for each strategy and compare them with each other. Additionally, we vary the size of the sampled target set. Overall, we find that both sampling strategies can produce inconsistent rankings compared with the full ranking of the models. Furthermore, both sampling by popularity and uniform random sampling do not consistently produce the same ranking ...
Exciting Hard Spheres
Creators: name: Antal, T.
name: Krapivsky, P. L.
name: Redner, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: We investigate the collision cascade that is generated by a single moving incident particle on a static hard-sphere gas. We argue that the number of moving particles at time t grows as t^{xi} and the number collisions up to time t grows as t^{eta}, with xi=2d/(d+2) and eta=2(d+1)/(d+2) and d the spatial dimension. These growth laws are the same as those from a hydrodynamic theory for the shock wave emanating from an explosion. Our predictions are verified by molecular dynamics simulations in d=1 and 2. For a particle incident on a static gas in a half-space, the resulting backsplatter ultimately contains almost all the initial energy.
description: 3.5 pages, 4 figures, 2-column revtex4 format
Human Instincts, Everyday Life, and the Brain: List of models produced by this research series
Creators: name: Wills, Richard H.
Publisher: name: Zenodo
Year: 2016
Subjects: feelings, feelings as instincts, feelings enable us to get and keep resources, communication of feelings, using feelings to cheat, feelings in animals, purpose of a tail, smiles, pleasure, consciousness, consciousness is a decision-making apparatus, any species that makes decisions has consciousness, tension, warmth, effort, tense and release, envy, anxiety, anger, guilt, positive feelings, negative feelings, hurt, bother, positive stimulation, boring, tedious, categories, models, consistency, inconsistency, establishing consistency, language, sounds, words, culture, correct and incorrect behavior, brain, repetition, categories are formed by recognizing repetition, the arts, attractiveness, unknowns, threats and opportunities, orientations, how the brain reduces its work, symmetry, centering, symmetry is a form of repetition, the mind, single-focus minds, multiple-focus minds, routines, programmed behavior, human pretentiousness, feelings and consciousness in other species, human abuse of other species

description: Please download - Files / List of models with front page.doc
Investigation of the effects of non-Gaussian noise transients and their mitigation in parameterized gravitational-wave tests of general relativity
Creators: name: Kwok, Jack Y. L.
name: Lo, Rico K. L.
name: Weinstein, Alan J.
name: Li, Tjonnie G. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The detection of gravitational waves from compact binary coalescence by Advanced LIGO and Advanced Virgo provides an opportunity to study the strong-field, highly relativistic regime of gravity. Gravitational-wave tests of general relativity (GR) typically assume Gaussian and stationary detector noise and, thus, do not account for non-Gaussian, transient noise features (glitches). We present the results obtained by performing parametrized gravitational-wave tests on simulated signals from binary-black-hole coalescence overlapped with three classes of frequently occurring instrumental glitches with distinctly different morphologies. We then review and apply three glitch mitigation methods and evaluate their effects on reducing false deviations from GR. By considering nine cases of glitches overlapping with simulated signals, we show that the short-duration, broadband blip and tomte glitches under consideration introduce false violations of GR, and using an inpainting filter and glitch model subtraction can consistently eliminate such false violations without introducing additional effects.
description: 16 pages, 10 figures; matches PRD version
High-order Van Hove singularities and their connection to flat bands
Creators: name: Classen, Laura
name: Betouras, Joseph J.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The flattening of single-particle band structures plays an important role in the quest for novel quantum states of matter due to the crucial role of interactions. Recent advances in theory and experiment made it possible to construct and tune systems with nearly flat bands, ranging from graphene multilayers and moire' materials to kagome' metals and ruthenates. While theoretical models predict exactly flat bands under certain ideal conditions, evidence was provided that these systems host high-order Van Hove points, i.e., points of high local band flatness and power-law divergence in energy of the density of states. In this review, we examine recent developments in engineering and realising such weakly dispersive bands. We focus on high-order Van Hove singularities and explore their connection to exactly flat bands. We provide classification schemes and discuss interaction effects. We also review experimental evidence for high-order Van Hove singularities and point out future research directions.
description: Review article, to appear in Annual Review of Condensed Matter Physics
Some 6-dimensional Hamiltonian S^1 manifolds
Creators: name: McDuff, Dusa
Publisher: name: arXiv
Year: 2008
Subjects: subject: Symplectic Geometry (math.SG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53D05, 53D20, 57S05, 14J30

description: In an earlier paper we explained how to convert the problem of symplectically embedding one 4-dimensional ellipsoid into another into the problem of embedding a certain set of disjoint balls into \CP^2 by using a new way to desingularize orbifold blow ups Z of the weighted projective space \CP^2_{1,m,n}. We now use a related method to construct symplectomorphisms of these spaces Z. This allows us to construct some well known Fano 3-folds (including the Mukai--Umemura 3-fold) in purely symplectic terms, using a classification by Tolman of a particular class of Hamiltonian S^1-manifolds. We also show that these manifolds are uniquely determined by their fixed point data up to equivariant symplectomorphism. As part of this argument we show that the symplectomorphism group of a certain weighted blow up of a weighted projective plane is connected.
description: 40 pages, 9 figures; v2: proof of Thm 2.16 improved, figure added; to be published in Journal of Topology
Slides for: Semantic Communications: Principles and Challenges
Creators: Dr. Zhijin Qin
Publisher: name: IEEE
Year: 2022

Slides for: SPS Webinar, June 20, 2022, Dr. Zhijin Qin
In past decades, conventional communication primarily focused on how to accurately and effectively transmit symbols, which is categorized as the first level of communications by Shannon and Weaver. With the developments of cellular communication systems, the achieved transmission rate is gradually approaching to the Shannon limit. Inspired by the power of deep learning, the semantic communication has been regarded as a promising solution to further improve the system efficiency, which is categorized as the second level of communications. Semantic communications aim to realize the successful semantic information exchange rather than receive the transmitted bit sequences or symbols accurately. In this talk, I will introduce the basis of semantic communications first. Our recent work on deep learning has enabled semantic communications will be presented. Research challenges are discussed at the end of the talk.
Stimulation of t-aminolevulinic acid metabolism by uroporphyrinogen I in rat liver homogenates
Creators: name: Shivji, Ally
Publisher: name: University of British Columbia
Year: 2010

description: Studies were carried out to investigate the events that prevent the excessive accumulation and excretion of 5-aminolevulinic acid and porphobilinogen, in erythropoietic porphyria and porphyria cutanea tarda. The effect of excess uroporphyrinogens I and IIIr coproporphyrinogen III, and the corresponding porphyrins, on the rate of 4-(14-C) 5-aminolevulinic acid metabolism, were studied. Experiments were carried out with mitochondria free rat liver homogenates, prepared from normal and hexachlorobenzene treated rats. The consumption of 5-aminolevulinic acid was followed by measuring its concentration in content of aliquots, removed at various intervals. The rates of porphobilinogen and porphyrin accumulation were also measured to obtain additional information on the nature of interactions, if any, between the enzymes. The pattern of porphyrin synthesis was examined by high performance liquid chromatographic analysis. In comparing the biochemical events taking place in the normal and porphyric rat liver preparations, the latter had an impaired ability to decarboxylate uroporphyrinogen, as well as a higher capacity (approximately five fold) to metabolize 5-aminolevulinic acid. Of the compounds studied, only uroporphyrinogen I had an effect on the pathway. It stimulated the activities of 5-aminolevulinic acid dehydrase and uroporphyrinogen I synthase in the normal as well as porphyric liver preparations. As a result, 5-aminolevulinic acid metabolism and porphyrin synthesis were stimulated. High performance liquid chromatographic analysis of porphyrin samples showed an accelerated growth of uroporphyrin and heptacarboxylic acid porphyrin fractions (relative to other porphyrins), upon addition of uroporphyrinogen I. The pattern of porphyrin synthesis remained unaltered when uroporphyrinogen I was added to preparations of porphyric livers. The results of these experiments, together with other experimental and clinical data, suggest that uroporphyrinogen I, which directly stimulates 5-aminolevulinic acid dehydrase and uroporphyrinogen I synthase in vitro, probably stimulates the pathway in the same way, in erythropoietic porphyria and porphyria cutanea tarda. Hence, increase in the conversion of 5-aminolevulinic acid and porphobilinogen to porphyrinogens, brought about by uroporphyrinogen I, prevents the accumulation of porphyrin precursors in these two conditions.
Towards High Efficiency Rational Switched-Capacitor Power Converter Topologies Slides
Creators: Man-Kay Law
Publisher: name: IEEE
Year: 2022

Webinar Slides
Abstract: With the advantages of higher-quality on-chip power components, fine system integrability and better loop stability, switched-capacitor power converters (SCPC) have attracted widespread interests in large-scale SoCs, low-power wireless integrated systems, and energy-harvesting-powered sensor microsystems. However, such applications typically require a high conversion efficiency in a small form factor as well as dynamic input/output voltage adaptation, inevitably raising the design challenges due to the diverse intrinsic limitations with the conventional SCPC topologies. This presentation will first review the key fundamental principles of SCPCs, together with the theoretical loss evaluation models. It will then introduce state-of-the-art rational topology designs and circuit implementations. The design tradeoffs among different rational topologies will also be introduced.

Biography: Man-Kay Law received the B.Sc. degree in Computer Engineering and the Ph.D. degree in Electronic and Computer Engineering from Hong Kong University of Science and Technology in 2006 and 2011, respectively. In 2011, he joined the State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, Macau, China, where he is currently an Associate Professor. His research interests include ultra-low power sensing circuits and systems, analog and mixed-signal integrated circuits, and energy harvesting techniques. He served as a distinguished lecturer for both IEEE SSCS and IEEE CASS. He is a senior member of IEEE, and is a member of the Technical Program Committee of ISSCC.
Panel Session: Regulatory Challenges in Deployment of Transmission Grid-Enhancing Technologies (slides)
Creators: R. Gramlich
Publisher: name: IEEE
Year: 2022

Panelists from the regulatory section of the energy industry will focus on regulatory challenges for the deployment of transmission technologies across the US regions. As deployed in certain circumstances, the enhanced transmission technologies would enhance reliability, efficiency, and capacity and improve the operation of new or existing transmission facilities. This panel will discuss regulatory challenges in implementing this shared savings incentive approach for transmission technologies under Federal Power Act section 219. In addition, this panel will look into FERC orders and workshops with a focus on how to calculate ex-ante and ex-post benefit analysis for Grid-Enhancing Technologies (GETs) including but not limited to (i) Dynamic Line Rating (DLR), (ii) advanced modular power flow control (MPFC), (iii) and grid topology optimization.
Panelists from the regulatory section of the energy industry will focus on regulatory challenges for the deployment of transmission technologies across the US regions. As deployed in certain circumstances, the enhanced transmission technologies would enhance reliability, efficiency, and capacity and improve the operation of new or existing transmission facilities. This panel will discuss regulatory challenges in implementing this shared savings incentive approach for transmission technologies under Federal Power Act section 219. In addition, this panel will look into FERC orders and workshops with a focus on how to calculate ex-ante and ex-post benefit analysis for Grid-Enhancing Technologies (GETs) including but not limited to (i) Dynamic Line Rating (DLR), (ii) advanced modular power flow control (MPFC), (iii) and grid topology optimization.
Presentations and Panelists:
- Regulatory Challenges in Deployment of Transmission Grid Enhancing Technologies by R. Gramlich, Grid Strategies
Hinode Observations of Vector Magnetic Field Change Associated with a Flare on 2006 December 13
Creators: name: Kubo, Masahito
name: Yokoyama, Takaaki
name: Katsukawa, Yukio
name: Lites, Bruce W
name: Tsuneta, Saku
name: Suematsu, Yoshinori
name: Ichimoto, Kiyoshi
name: Shimizu, Toshifumi
name: Nagata, Shin'ichi
name: Tarbell, Theodore D
name: Shine, Richard A
name: Title, Alan M
name: Elmore, David
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Continuous observations of a flare productive active region 10930 were successfully carried out with the Solar Optical Telescope onboard the Hinode spacecraft during 2007 December 6 to 19. We focus on the evolution of photospheric magnetic fields in this active region, and magnetic field properties at the site of the X3.4 class flare, using a time series of vector field maps with high spatial resolution. The X3.4 class flare occurred on 2006 December 13 at the apparent collision site between the large, opposite polarity umbrae. Elongated magnetic structures with alternatingly positive and negative polarities resulting from flux emergence appeared one day before the flare in the collision site penumbra. Subsequently, the polarity inversion line at the collision site became very complicated. The number of bright loops in Ca II H increased during the formation of these elongated magnetic structures. The flare ribbons and bright loops evolved along the polarity inversion line and one footpoint of the bright loop was located in a region having a large departure of field azimuth angle with respect to its surroundings. The SOT observations with high spatial resolution and high polarization precision reveal temporal change in fine structure of magnetic fields at the flare site: some parts of the complicated polarity inversion line then disappeared, and in those regions the azimuth angle of photospheric magnetic field changed by about 90 degrees, becoming more spatially uniform within the collision site.
description: 6 pages, 4 figures, accepted for publication in PASJ (Hinode Special Issue)
Star Cluster Classification in the PHANGS-HST Survey: Comparison between Human and Machine Learning Approaches
Creators: name: Whitmore, Bradley C.
name: Lee, Janice C.
name: Chandar, Rupali
name: Thilker, David A.
name: Hannon, Stephen
name: Wei, Wei
name: Huerta, E. A.
name: Bigiel, Frank
name: Boquien, Médéric
name: Chevance, Mélanie
name: Dale, Daniel A.
name: Deger, Sinan
name: Grasha, Kathryn
name: Klessen, Ralf S.
name: Kruijssen, J. M. Diederik
name: Larson, Kirsten L.
name: Mok, Angus
name: Rosolowsky, Erik
name: Schinnerer, Eva
name: Schruba, Andreas
name: Ubeda, Leonardo
name: Van Dyk, Schuyler D.
name: Watkins, Elizabeth
name: Williams, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: When completed, the PHANGS-HST project will provide a census of roughly 50,000 compact star clusters and associations, as well as human morphological classifications for roughly 20,000 of those objects. These large numbers motivated the development of a more objective and repeatable method to help perform source classifications. In this paper we consider the results for five PHANGS-HST galaxies (NGC 628, NGC 1433, NGC 1566, NGC 3351, NGC 3627) using classifications from two convolutional neural network architectures (RESNET and VGG) trained using deep transfer learning techniques. The results are compared to classifications performed by humans. The primary result is that the neural network classifications are comparable in quality to the human classifications with typical agreement around 70 to 80$\%$ for Class 1 clusters (symmetric, centrally concentrated) and 40 to 70$\%$ for Class 2 clusters (asymmetric, centrally concentrated). If Class 1 and 2 are considered together the agreement is 82 $\pm$ 3$\%$. Dependencies on magnitudes, crowding, and background surface brightness are examined. A detailed description of the criteria and methodology used for the human classifications is included along with an examination of systematic differences between PHANGS-HST and LEGUS. The distribution of data points in a colour-colour diagram is used as a 'figure of merit' to further test the relative performances of the different methods. The effects on science results (e.g., determinations of mass and age functions) of using different cluster classification methods are examined and found to be minimal.
description: 28 pages, 25 figures. Accepted for publication in Monthly Notices of the Royal Astronomical Society. Version with full resolution figures found at https://sites.google.com/view/phangs/publications
Gravitational waves generation in turbulent hypermagnetic fields before the electroweak phase transition
Creators: name: Dvornikov, Maxim
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the production of relic gravitational waves (GWs) in turbulent hypermagnetic fields (HMFs) in the symmetric phase of the early universe before the electroweak phase transition (EWPT). The noise of HMFs is modeled by the analog of the magnetic hydrodynamics turbulence. The evolution of HMFs is driven by the analogs of the chiral magnetic effect and the Adler anomalies in the presence of the nonzero asymmetries of leptons and Higgs bosons. We track the evolution of the energy density of GWs from 10 TeV down to EWPT and analyze its dependence on the parameters of the system. We also discuss the possibility to observe the predicted GW background by the current GW detectors.
description: 17 pages in jcap LaTeX style, 13 eps figures; paper is significantly revised, Secs. 3 and 4 are modified, new Fig. 2 is included, several new references are added; version published in JCAP
Infinite divisibility of Smith matrices
Creators: name: Hong, Shaofang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11C20; 11A25

description: Given an arithmetical function $f$, by $f(a, b)$ and $f[a, b]$ we denote the function $f$ evaluated at the greatest common divisor $(a, b)$ of positive integers $a$ and $b$ and evaluated at the least common multiple $[a, b]$ respectively. A positive semi-definite matrix $A=(a_{ij})$ with $a_{ij}\ge 0$ for all $i$ and $j$ is called infinitely divisible if the fractional Hadamard power $A^{\circ r}=(a_{ij}^r)$ is positive semi-definite for every nonnegative real number $r$. Let $S=\{x_1, ..., x_n\}$ be a set of $n$ distinct positive integers. In this paper, we show that if $f$ is a multiplicative function such that $(f*μ)(d)\ge 0$ whenever $d|x$ for any $x\in S$, then the $n\times n$ matrices $(f(x_i, x_j))$, $(\frac{1}{f[x_i, x_j]})$ and $(\frac{f(x_i, x_j)}{f[x_i, x_j]})$ are infinitely divisible. Finally we extend these results to the Dirichlet convolution case which produces infinitely many examples of infinitely divisible matrices. Our results extend the results obtained previously by Bourque, Ligh, Bhatia, Hong, Lee, Lindqvist and Seip.
description: 8 pages. to appear in Acta Arith
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (186)]
Creators: name: De Gualdemannis, Petrus
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1244
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Petrus de Gualdemannis belehnt Johannes Bonus und Grisius de Ansoldis mit einem Stück Land in Polesine Parmense.
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (191)]
Creators: name: De Pigo, Johannes
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1245
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Johannes de Pigo verkauft Andreas Ziua Güter in Castelleone.
Biologically Plausible Training Mechanisms for Self-Supervised Learning in Deep Networks
Creators: name: Tang, Mufeng
name: Yang, Yibo
name: Amit, Yali
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: We develop biologically plausible training mechanisms for self-supervised learning (SSL) in deep networks. Specifically, by biological plausible training we mean (i) All updates of weights are based on current activities of pre-synaptic units and current, or activity retrieved from short term memory of post synaptic units, including at the top-most error computing layer, (ii) Complex computations such as normalization, inner products and division are avoided (iii) Asymmetric connections between units, (iv) Most learning is carried out in an unsupervised manner. SSL with a contrastive loss satisfies the third condition as it does not require labelled data and it introduces robustness to observed perturbations of objects, which occur naturally as objects or observer move in 3d and with variable lighting over time. We propose a contrastive hinge based loss whose error involves simple local computations satisfying (ii), as opposed to the standard contrastive losses employed in the literature, which do not lend themselves easily to implementation in a network architecture due to complex computations involving ratios and inner products. Furthermore we show that learning can be performed with one of two more plausible alternatives to backpropagation that satisfy conditions (i) and (ii). The first is difference target propagation (DTP) and the second is layer-wise learning (LL), where each layer is directly connected to a layer computing the loss error. Both methods represent alternatives to the symmetric weight issue of backpropagation. By training convolutional neural networks (CNNs) with SSL and DTP, LL, we find that our proposed framework achieves comparable performance to standard BP learning downstream linear classifier evaluation of the learned embeddings.
description: To be published in Frontiers in Computational Neuroscience
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (187)]
Creators: name: Dalfinus Spatarius
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1244
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Dalfinus Spatarius verkauft Petrus de Gualdomannis alle Rechte, die er gegenüber Fazathinus de Gastoldis aus Polesine Parmense besessen hat.
GM 22 Tutorial: Modeling and Planning of Distributed Energy Resources in Distribution System with Open-Source Software (slides)
Creators: Panitarn Chongfuangprinya
David Chassin
Bo Yang
Yanzhu Ye
Publisher: name: IEEE
Year: 2022

Because of distributed energy resources (DER), planning of the grid becomes more complex and dynamic for grid planners. Open-source software (OSS) is a flexible solution to supplement and interoperate with existing tools and processes. While there are many OSS tools used in different aspects of utilities, this tutorial focuses on distribution grid modeling and simulation. This tutorial will start with policy initiatives and trends of change for distribution resource planning. Tools for distribution grid simulation, resource planning, and DER modeling will be discussed along with real-world experience and lessons learned. Next, the pros and cons of using OSS in DER planning and operation will be discussed. Guidance on the adoption of OSS for distribution planning and simulation will be provided. Business benefits will be discussed as well. In addition, this tutorial will introduce example use cases and OSS tools to explore the impact of new loads, controls, and market structures.
Because of distributed energy resources (DER), planning of the grid becomes more complex and dynamic for grid planners. Open-source software (OSS) is a flexible solution to supplement and interoperate with existing tools and processes. While there are many OSS tools used in different aspects of utilities, this tutorial focuses on distribution grid modeling and simulation. This tutorial will start with policy initiatives and trends of change for distribution resource planning. Tools for distribution grid simulation, resource planning, and DER modeling will be discussed along with real-world experience and lessons learned. Next, the pros and cons of using OSS in DER planning and operation will be discussed. Guidance on the adoption of OSS for distribution planning and simulation will be provided. Business benefits will be discussed as well. In addition, this tutorial will introduce example use cases and OSS tools to explore the impact of new loads, controls, and market structures.
Diffusion and spatial correlations in suspensions of swimming particles
Creators: name: Underhill, Patrick T.
name: Hernández-Ortiz, Juan P.
name: Graham, Michael D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Populations of swimming microorganisms produce fluid motions that lead to dramatically enhanced diffusion of tracer particles. Using simulations of suspensions of swimming particles in a periodic domain, we capture this effect and show that it depends qualitatively on the mode of swimming: swimmers ``pushed'' from behind by their flagella show greater enhancement than swimmers that are ``pulled'' from the front. The difference is manifested by an increase, that only occurs for pushers, of the diffusivity of passive tracers and the velocity correlation length with the size of the periodic domain. A physical argument supported by a mean field theory sheds light on the origin of these effects.
description: 10 pages, 3 figures, to be published in Phys. Rev. Lett
Inverter-based Resources Subsynchronous Oscillations: Events and Mechanism Analysis (Slides)
Creators: Lingling Fan (USF)
Yunzhi Cheng (ERCOT)
Jayanth R. Ramamurthy (AEMO)
Xiaorong Xie (Tsinghua Univ)
Jan Shair (Tsinghua University)
Zhixin Miao (USF) IBR SSO Task Force
Publisher: name: IEEE
Year: 2022

This webinar presents a survey of real-world subsynchronous oscillation events associated with inverter-based resources (IBR) over the past decade. The focus is on those oscillations in the subsynchronous frequency range known to be influenced by power grid characteristics, e.g., series compensation or low system strength. A brief overview of the historical events is presented followed by detailed descriptions of a series of events. This webinar also examines causation mechanisms and proposes future research directions to meet grid needs worldwide.
This webinar presents a survey of real-world subsynchronous oscillation events associated with inverter-based resources (IBR) over the past decade. The focus is on those oscillations in the subsynchronous frequency range known to be influenced by power grid characteristics, e.g., series compensation or low system strength. A brief overview of the historical events is presented followed by detailed descriptions of a series of events. This webinar also examines causation mechanisms and proposes future research directions to meet grid needs worldwide.
Panel Session: Provision of Grid services from Grid-Edge Assets (slides)
Creators: A. Ipakchi
A. James
S. Borlase
Publisher: name: IEEE
Year: 2022

The electricity market in undergoing fundamental changes due to proliferation of variable energy resources (VERs) at bulk and Distributed Energy Resources (DERs) at the grid edge. These changes are leading to the need for increasing levels of conventional grid services such as operating reserves and frequency regulation as well as the need for new types of grid services. The latter include ramping, load following, and Fast Frequency Response to mention a few. There is also increasing need for distribution grid services such as voltage regulation, phase balancing, and reverse flow mitigation. This panel session will address how DERs can be leveraged to turn them from being a problem for grid operation into a solution for provision of grid services. The following topics will be addressed:
o Impact of VERs and DERs on power grid and energy market operations
o Conventional and emerging grid services
o Possibilities and limitations of providing grid services from DERs
o Systems and platforms for DER participation in provision of grid services
o Implementation examples and field results
The electricity market in undergoing fundamental changes due to proliferation of variable energy resources (VERs) at bulk and Distributed Energy Resources (DERs) at the grid edge. These changes are leading to the need for increasing levels of conventional grid services such as operating reserves and frequency regulation as well as the need for new types of grid services. The latter include ramping, load following, and Fast Frequency Response to mention a few. There is also increasing need for distribution grid services such as voltage regulation, phase balancing, and reverse flow mitigation. This panel session will address how DERs can be leveraged to turn them from being a problem for grid operation into a solution for provision of grid services. The following topics will be addressed:
o Impact of VERs and DERs on power grid and energy market operations
o Conventional and emerging grid services
o Possibilities and limitations of providing grid services from DERs
o Systems and platforms for DER participation in provision of grid services
o Implementation examples and field results
Panelists:
Presentations and Panelists:
• “Systems and Platforms for DER Participation in Provision of Grid Services” by A. Ipakchi, OATI
• “Bulk Renewable and BTM PV and EV Integration – Adding Value and Mitigating Impacts” by A. James, SCE
• “DER-Enabled ADMS” by S. Borlase, ESTA International, LLC
A Parallactic Distance of 389 +24/-21 parsecs to the Orion Nebula Cluster from Very Long Baseline Array Observations
Creators: name: Sandstrom, Karin M.
name: Peek, J. E. G.
name: Bower, Geoffrey C.
name: Bolatto, Alberto D.
name: Plambeck, Richard L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We determine the parallax and proper motion of the flaring, non-thermal radio star GMR A, a member of the Orion Nebula Cluster, using Very Long Baseline Array observations. Based on the parallax, we measure a distance of 389 +24/-21 parsecs to the source. Our measurement places the Orion Nebula Cluster considerably closer than the canonical distance of 480 +/- 80 parsecs determined by Genzel et al. (1981). A change of this magnitude in distance lowers the luminosities of the stars in the cluster by a factor of ~ 1.5. We briefly discuss two effects of this change--an increase in the age spread of the pre-main sequence stars and better agreement between the zero-age main-sequence and the temperatures and luminosities of massive stars.
description: 10 pages, 4 figures, emulateapj, accepted to ApJ
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (188)]
Creators: name: (:Unkn) Unknown
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1244
Subjects: subject: Sonstige weltliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Das consilium sapientium [von Cremona], bestehend aus genannten Personen, spricht die Einwohner von Rivarolo del Re von der Zahlung eines geschuldeten Geldbetrags an die Stadt Cremona frei.
Panel Session: Aligning Smart Grid Operational Monitoring and Regulatory Data Requirements on Decarbonization (slides)
Creators: D. Jones
S. Chandler
S. Zulkader
Publisher: name: IEEE
Year: 2022

The electric grid is a complex system with highly differentiated energy supply management, regulatory, and grid operational domains. Emerging digitalization technologies such as digital twin, simulation and distributed ledgers (Blockchain) are set forth with broad goals as a foundation to support decarbonization and align the distributed nature of operations across each grid domain. This session will explore perspectives on the technologies, architectures, use cases, and standards evolving to advance smart grid treatment of EV adoption and electrified transportation. The panel session will focus on key system features and challenges within industry, ISO and utility operations, accommodating two industrial, one utility and one ISO sub-topic:
o ISO perspective on DLT, tracking decarbonization and market implementation
o Utility applications for supporting decarbonization through EV program design and regulatory alignment
o Contrasting European carbon market emissions tracking with North American EV and smart grid
o Use of digital twin and DLT as a mechanism for gathering regulatory data on EV and EVSE program management
The electric grid is a complex system with highly differentiated energy supply management, regulatory, and grid operational domains. Emerging digitalization technologies such as digital twin, simulation and distributed ledgers (Blockchain) are set forth with broad goals as a foundation to support decarbonization and align the distributed nature of operations across each grid domain. This session will explore perspectives on the technologies, architectures, use cases, and standards evolving to advance smart grid treatment of EV adoption and electrified transportation. The panel session will focus on key system features and challenges within industry, ISO and utility operations, accommodating two industrial, one utility and one ISO sub-topic:
o ISO perspective on DLT, tracking decarbonization and market implementation
o Utility applications for supporting decarbonization through EV program design and regulatory alignment
o Contrasting European carbon market emissions tracking with North American EV and smart grid
o Use of digital twin and DLT as a mechanism for gathering regulatory data on EV and EVSE program management
Presentations and Panelists:
• “Utility Applications for Supporting Decarbonization through EV Program Design and Regulatory Alignment” by D. Jones, Guidehouse, Inc.
• “ISO Perspective on DLT - Tracking Decarbonization and Market Implementation” by S. Zulkader, CAISO
• “Use of Digital Twin and DLT as a mechanism for EV and EVSE Utility Program Management” by S. Chandler, IEEE
Criterios de digitalización del proyecto DRAINAGE
Creators: name: Díaz-Redondo, María
Publisher: name: Zenodo
Year: 2021

description: Documento en el que se describen los criterios seguidos en la digitalización del Territorio Fluvial y de los hábitats naturales y antrópicos, que se han empleado en el estudio diacrónico del Duero en el meandro de Argañas (aguas arriba de Zamora). También se incluyen los criterios seguidos en la digitalización de otros elementos (cauce activo, riberas topográficas y funcionales) necesarios para la caracterización hidromorfológica del río Duero entre Toro y Zamora.
description: This research was funded by the project DRAINAGE, CGL2017–83546–C3–R (MINECO/AEI/FEDER,UE), and it is specifically part of the assessments carried out under the coverage of the sub–project DRAINAGE–2–R (CGL2017–83546–C3–2–R).
Entanglement in Weisskopf-Wigner theory of atomic decay in free space
Creators: name: Leandro, J. F.
name: Semião, F. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this paper, we use the Weisskopf-Wigner theory to study the entanglement in the state of the free-space radiation field produced from vacuum due to atomic decay. We show how bipartite entanglement is shared between different partitions of the radiation modes. We investigate the role played by the size of the partitions and their detuning with the decaying atom. The dynamics of the atom-field entanglement during the atomic decay is also briefly discussed. From this dynamics, we assert that such entanglement is the physical quantity that fix the statistical atomic decay time.
description: 7 pages, 4 figures, changed from purity to entropy of entanglement calculations in the replaced version
July - Smart Grid & Applications
Creators: Adel El-Shahat
Soheil Mohseni and Alan Brent
Linda Zeger
Publisher: name: IEEE
Year: 2022

Bulletin
An issue of the Smart Grid Bulletin featuring "Speed up Electrified Aircraft and Flying Vehicles Development for Future Smart Grids," "Harnessing the full potential of flexible loads to improve the economics of 100%-renewable isolated microgrids," and "Information Reliability Essential for Use of Smart Grid DER Behind the Meter"
[Halle (Saale), Universitäts- und Landesbibliothek Sachsen-Anhalt, Morbio 2 (192 a)]
Creators: name: , Johannes
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 1245
Subjects: subject: Sonstige geistliche Aussteller
subject: Notarsurkunde
subject: Urkunde
subject: 090

description: Johannes, praepositus der Kirche St. Cataldi [in Cremona], belehnt Pironus de Aqua aus der Nachbarschaft von St. Ylarii mit einem Stück Land, gelegen in Bragida Lunga, genannt Brugnetum.