cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Nuclear-Astrophysics Lessons from INTEGRAL
Creators: name: Diehl, Roland
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Measurements of high-energy photons from cosmic sources of nuclear radiation through ESA's INTEGRAL mission have advanced our knowledge: New data with high spectral resolution showed that characteristic gamma-ray lines from radioactive decays occur throughout the Galaxy, in its interstellar medium and from sources. Although the number of detected sources and often the significance of the astrophysical results remain modest, conclusions derived from this unique astronomical window of radiation originating from nuclear processes are important, complementing the widely-employed atomic-line based spectroscopy. We review the results and insights obtained in the past decade from gamma-ray line measurements of cosmic sources, in the context of their astrophysical questions.
description: Invited review. 30 pages, 26 figures. This is an author-created, un-copyedited version of an article accepted for publication in Reports on Progress in Physics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at DOI 10.1088/0034-4885/76/2/026301
Utility Optimal Scheduling and Admission Control for Adaptive Video Streaming in Small Cell Networks
Creators: name: Bethanabhotla, Dilip
name: Caire, Giuseppe
name: Neely, Michael J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Multimedia (cs.MM)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We consider the jointly optimal design of a transmission scheduling and admission control policy for adaptive video streaming over small cell networks. We formulate the problem as a dynamic network utility maximization and observe that it naturally decomposes into two subproblems: admission control and transmission scheduling. The resulting algorithms are simple and suitable for distributed implementation. The admission control decisions involve each user choosing the quality of the video chunk asked for download, based on the network congestion in its neighborhood. This form of admission control is compatible with the current video streaming technology based on the DASH protocol over TCP connections. Through simulations, we evaluate the performance of the proposed algorithm under realistic assumptions for a small-cell network.
description: 5 pages, 4 figures. Accepted and will be presented at IEEE International Symposium on Information Theory (ISIT) 2013
WEG Wind Drivetrain Developments
Creators: name: Bywaters, Garrett
Publisher: name: Zenodo
Year: 2023

description: This presentation discusses the developments WEG has made with wind drivetrains & highlights their product line, program goals & results.
description: {"references": ["Performance and Reliability of Wind Turbines: A Review Pfaffel, Faulstich, Rohrig, 2017", "Failure rate, repair time and unscheduled O&M cost analysis of offshore wind turbines Carroll, McDonald, McMillan, Wind Energy, 2016", "Wind Turbine Gearbox Reliability Assessment https://www.epri.com/research/programs/113055/results/3002021422", "Wind turbine reliability data review and impacts on levelized cost of energy Dao, Kazemtabrizi, Crabtree, 2019"]}
On the spectrum and ergodicity of a neutral multi-allelic Moran model
Creators: name: Corujo, Josué
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60J27, Secondary 37A30, 92D10, 33C50

description: The purpose of this paper is to provide a complete description of the eigenvalues of the generator of a neutral multi-type Moran model, and the applications to the study of the speed of convergence to stationarity. The Moran model we consider is a non-reversible in general, continuous-time Markov chain with an unknown stationary distribution. Specifically, we consider $N$ individuals such that each one of them is of one type among $K$ possible allelic types. The individuals interact in two ways: by an independent irreducible mutation process and by a reproduction process, where a pair of individuals is randomly chosen, one of them dies and the other reproduces. Our main result provides explicit expressions for the eigenvalues of the infinitesimal generator matrix of the Moran process, in terms of the eigenvalues of the jump rate matrix. As consequences of this result, we study the convergence in total variation of the process to stationarity and show a lower bound for the mixing time of the Moran process. Furthermore, we study in detail the spectral decomposition of the neutral multi-allelic Moran model with parent independent mutation scheme, which is the unique mutation scheme that makes the neutral Moran process reversible. Under the parent independent mutation, we also prove the existence of a cutoff phenomenon in the chi-square and the total variation distances when initially all the individuals are of the same type and the number of individuals tends to infinity. Additionally, in the absence of reproduction, we prove that the total variation distance to stationarity of the parent independent mutation process when initially all the individuals are of the same type has a Gaussian profile.
description: 34 pages. Updated version with minor changes. To appear in ALEA journal
title: Vorträge und Forschungen: Sonderbände, Vol 19 (1975): Klaus Militzer: Das Markgröninger Heilig-Geist-Spital im Mittelalter
Creators: name: Vorträge Und Forschungen: Sonderbände
Publisher: name: University Library Heidelberg
Year: 2015

description: Ein Beitrag zur Wirtschaftsgeschichte des 15. Jahrhunderts
description: Ein Beitrag zur Wirtschaftsgeschichte des 15. Jahrhunderts
description: Das Markgröninger Heilig-Geist-Spital im Mittelalter. Ein Beitrag zur Wirtschaftsgeschichte des 15. Jahrhunderts
Neuronal migration and differentiation in the developing locust enteric nervous system
Creators: name: Knipp, Sabine
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2009
Subjects: subject: Neuronal development
subject: cell migration
subject: gaseous modulators
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Straight segments in the galactic discs
Creators: name: Mel'nik, A. M.
name: Rautiainen, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the properties of the straight segments forming in N-body simulations of the galactic discs. The properties of these features are consistent with the observational ones summarized by Chernin at al. (2001). Unlike some previous suggestions to explain the straight segments as gas dynamical instabilities, they form in our models in the stellar system. We suggest that the straight segments are forming as a response of the rotating disc to a gravity of the regions of enhanced density (overdensities) corotating with the disc. The kinematics of stars near the prominent overdensities is consistent with this hypothesis.
description: 15 pages, 13 figures, accepted for publication in MNRAS
M31N 1926-07c: A Recurrent Nova in M31 with a 2.8 Year Recurrence Time
Creators: name: Shafter, Allen W.
name: Hornoch, Kamil
name: Kučáková, Hana
name: Zhao, Jingyuan
name: Zhang, Mi
name: Gao, Xing
name: Della Costa, John
name: Burris, William A.
name: Clark, J. Grace
name: Wolf, Marek
name: Zasche, Petr
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The M31 recurrent nova M31N 1926-07c has had five recorded eruptions. Well-sampled light curves of the two most recent outbursts, in January of 2020 (M31N 2020-01b) and September 2022 (M31N 2022-09a), are presented showing that the photometric evolution of the two events were quite similar, with peak magnitudes of $R=17.2\pm0.1$ and $R=17.1\pm0.1$, and $t_2$ times of $9.7\pm0.9$ and $8.1\pm0.5$ days for the 2020 and 2022 eruptions, respectively. After considering the dates of the four most recent eruptions (where the cycle count is believed to be known), a mean recurrence interval of $\langle P_\mathrm{rec}\rangle=2.78\pm0.03$ years is found, establishing that M31N 1926-07c has one of the shortest recurrence times known.
description: 5 pages; 1 figure; 1 table; Published in Research Notes of the AAS
On Control of Epidemics with Application to COVID-19
Creators: name: Hsieh, Chung-Han
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Biological sciences
subject: 93E03, 93D15, 92B05, 92D30

description: At the time of writing, the ongoing COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), had already resulted in more than thirty-two million cases infected and more than one million deaths worldwide. Given the fact that the pandemic is still threatening health and safety, it is in the urgency to understand the COVID-19 contagion process and know how it might be controlled. With this motivation in mind, in this paper, we consider a version of a stochastic discrete-time Susceptible-Infected-Recovered-Death~(SIRD)-based epidemiological model with two uncertainties: The uncertain rate of infected cases which are undetected or asymptomatic, and the uncertain effectiveness rate of control. Our aim is to study the effect of an epidemic control policy on the uncertain model in a control-theoretic framework. We begin by providing the closed-form solutions of states in the modified SIRD-based model such as infected cases, susceptible cases, recovered cases, and deceased cases. Then, the corresponding expected states and the technical lower and upper bounds for those states are provided as well. Subsequently, we consider two epidemic control problems to be addressed: One is almost sure epidemic control problem and the other average epidemic control problem. Having defined the two problems, our main results are a set of sufficient conditions on a class of linear control policy which assures that the epidemic is "well-controlled"; i.e., both of the infected cases and deceased cases are upper bounded uniformly and the number of infected cases converges to zero asymptotically. Our numerical studies, using the historical COVID-19 contagion data in the United States, suggest that our appealingly simple model and control framework can provide a reasonable epidemic control performance compared to the ongoing pandemic situation.
description: Submitted to the SIAM Journal on Control and Optimization
Manufacturing conditioned wear of all-ceramic knee prostheses
Creators: name: Denkena, Berend
name: Köhler, Jens
name: Turger, Anke
name: Helmecke, Patrick
name: Correa, Tomas A.
name: Hurschler, Christof
Publisher: name: Amsterdam : Elsevier
Year: 2013
Subjects: subject: Ceramic knee implant prostheses
subject: Grinding
subject: Polishing
subject: Wear testing
subject: Contact geometry
subject: Geometrical accuracy
subject: Grinding and polishing
subject: Knee implants
subject: Machining technology
subject: Manufacturing process
subject: Total knee joints
subject: Wear-testing
subject: Bioceramics
subject: Grinding (machining)
subject: Implants (surgical)
subject: Joints (anatomy)
subject: Sintering
subject: Manufacture
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: To date, bioceramics have not been applied successfully in total knee joint endoprostheses. Sintered bioceramics can be machined only by grinding and polishing processes. Due to high quality requirements, there are significant challenges with regard to these machining technologies. An automated precise economical process chain for the manufacturing of a new all-ceramic knee implant design was developed. It was assumed the geometrical accuracy and the shape of implant contact geometry specified during the manufacturing process has a substantial influence on the wear behavior of the prosthesis. The importance of the surface quality of the ceramic implant surface remains unclear and warrants future examination.
title: Vorträge und Forschungen: Sonderbände, Vol 21 (1976): Heike Grahn-Hoek: Die fränkische Oberschicht im 6. Jahrhundert
Creators: name: Vorträge Und Forschungen: Sonderbände
Publisher: name: University Library Heidelberg
Year: 2015

description: Studien zu ihrer rechtlichen und politischen Stellung
description: Studien zu ihrer rechtlichen und politischen Stellung
description: Die fränkische Oberschicht im 6. Jahrhundert. Studien zu ihrer rechtlichen und politischen Stellung
Impact of metallicity on the evolution of young star clusters
Creators: name: Mapelli, M.
name: Bressan, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We discuss the results of N-body simulations of intermediate-mass young star clusters (SCs) with three different metallicities (Z=0.01, 0.1 and 1 Zsun), including metallicity-dependent stellar evolution recipes and metallicity-dependent prescriptions for stellar winds and remnant formation. The initial half-mass relaxation time of the simulated young SCs (~10 Myr) is comparable to the lifetime of massive stars. We show that mass-loss by stellar winds influences the reversal of core collapse and the expansion of the half-mass radius. In particular, the post-collapse re-expansion of the core is weaker for metal-poor SCs than for metal-rich SCs, because the former lose less mass (through stellar winds) than the latter. As a consequence, the half-mass radius expands faster in metal-poor SCs. The difference in the half-light radius between metal-poor SCs and metal-rich SCs is (up to a factor of two) larger than the difference in the half-mass radius.
description: 9 pages, 9 figures, 2 tables, MNRAS, accepted
title: Vorträge und Forschungen: Sonderbände, Vol 32 (1984): Ingrid Heidrich: Ravenna unter Erzbischof Wibert (1073 – 1100)
Creators: name: Vorträge Und Forschungen: Sonderbände
Publisher: name: University Library Heidelberg
Year: 2015

description: Untersuchungen zur Stellung des Erzbischofs und Gegenpapstes Clemens III. in seiner Metropole
description: Untersuchungen zur Stellung des Erzbischofs und Gegenpapstes Clemens III. in seiner Metropole
description: Ravenna unter Erzbischof Wibert (1073 – 1100). Untersuchungen zur Stellung des Erzbischofs und Gegenpapstes Clemens III. in seiner Metropole
Decoupling inequalities for quadratic forms
Creators: name: Guo, Shaoming
name: Oh, Changkeun
name: Zhang, Ruixiang
name: Zorin-Kranich, Pavel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 42B25 (Primary) 11L15, 26D05 (Secondary)

description: We prove sharp $\ell^q L^p$ decoupling inequalities for $p,q \in [2,\infty)$ and arbitrary tuples of quadratic forms. Connections to prior results on decoupling inequalities for quadratic forms are also explained. We also include some applications of our results to exponential sum estimates and to Fourier restriction estimates. The proof of our main result is based on scale-dependent Brascamp--Lieb inequalities.
description: v2: corrected following referee reports, 37 pages
Discrete element model for general polyhedra
Creators: name: Neto, Alfredo Gay
name: Wriggers, Peter
Publisher: name: Berlin ; Heidelberg [u.a.] : Springer
Year: 2021
Subjects: subject: Barrier Method
subject: Discrete Element Method
subject: Master-master contact
subject: Non-convex
subject: Polyhedra
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: We present a version of the Discrete Element Method considering the particles as rigid polyhedra. The Principle of Virtual Work is employed as basis for a multibody dynamics model. Each particle surface is split into sub-regions, which are tracked for contact with other sub-regions of neighboring particles. Contact interactions are modeled pointwise, considering vertex-face, edge-edge, vertex-edge and vertex-vertex interactions. General polyhedra with triangular faces are considered as particles, permitting multiple pointwise interactions which are automatically detected along the model evolution. We propose a combined interface law composed of a penalty and a barrier approach, to fulfill the contact constraints. Numerical examples demonstrate that the model can handle normal and frictional contact effects in a robust manner. These include simulations of convex and non-convex particles, showing the potential of applicability to materials with complex shaped particles such as sand and railway ballast. © 2021, The Author(s).
New applications to in situ-produced cosmogenic nuclides in river sediment : high mountain belt denudation in the Swiss Alps and Bolivian Andes and sediment transfer and storage in the Amazon basin
Creators: name: Wittmann, Hella
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Cosmogenic nuclides
subject: Amazon Basin
subject: sediment transfer
subject: sediment burial
subject: cosmogenic nuclide-derived denudation rates
subject: Bolivian Andes
subject: Central Alps
subject: rock uplift
subject: numerical modeling
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
New insights into geminivirus complexes from Vietnam and Thailand
Creators: name: Blawid, Rosana
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Tomato yellow leaf curl Thailand virus
subject: transgenic plants
subject: virus-induced gene silencing
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: [no abstract]
Self-similar vortex-induced vibrations of a hanging string
Creators: name: Grouthier, Clement
name: Michelin, Sebastien
name: Modarres-Sadeghi, Yahya
name: de Langre, Emmanuel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: An experimental analysis of the vortex-induced vibrations of a hanging string with variable tension along its length is presented in this paper. It is shown that standing waves develop along the hanging string. The evolution of the Strouhal number St with the Reynolds number Re first follows a trend similar to what is observed for a circular cylinder in a flow for relatively low Reynolds numbers (32
description: 9 pages, 5 figures, to appear in J. Fluid Mech
title: Vorträge und Forschungen: Sonderbände, Vol 34 (1985): Michael Menzel: Die Sächsische Weltchronik. Quellen und Stoffauswahl
Creators: name: Vorträge Und Forschungen: Sonderbände
Publisher: name: University Library Heidelberg
Year: 2015

description: Die Sächsische Weltchronik. Quellen und Sfoffauswahl
The reversal of magnetization driven by the Dzyaloshinskii-Moriya interaction(DMI) in perovskite Bi2FeMnO6
Creators: name: Feng, Hong-Jian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Ab initio calculations show that the coupling between antiferrodistortive(AFD) distortions and magnetization in perovskite Bi2FeMnO6 is prohibited to make magnetization rotate as on-site Coulomb interaction($U$) is larger than 2.7 eV, where anomalies in antiferromagnetic(AFM) vectors and band gap varying with on-site Coulomb interaction can be observed. This coupling is attributed to the antisymmetric Dzyaloshinskii-Moriya interaction(DMI) driven by the eg-eg states AFM interaction and charge redistribution with respect to different AFD distortions.
Everyone Knows that Everyone Knows: Gossip Protocols for Super Experts
Creators: name: van Ditmarsch, Hans
name: Gattinger, Malvin
name: Ramezanian, Rahim
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: A gossip protocol is a procedure for sharing secrets in a network. The basic action in a gossip protocol is a pairwise message exchange (telephone call) wherein the calling agents exchange all the secrets they know. An agent who knows all secrets is an expert. The usual termination condition is that all agents are experts. Instead, we explore protocols wherein the termination condition is that all agents know that all agents are experts. We call such agents super experts. We also investigate gossip protocols that are common knowledge among the agents. Additionally, we model that agents who are super experts do not make and do not answer calls, and that this is common knowledge. We investigate conditions under which protocols terminate, both in the synchronous case, where there is a global clock, and in the asynchronous case, where there is not. We show that a commonly known protocol with engaged agents may terminate faster than the same commonly known protocol without engaged agents.
Extremal density for sparse minors and subdivisions
Creators: name: Haslegrave, John
name: Kim, Jaehoon
name: Liu, Hong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C83, 05C35

description: We prove an asymptotically tight bound on the extremal density guaranteeing subdivisions of bounded-degree bipartite graphs with a mild separability condition. As corollaries, we answer several questions of Reed and Wood on embedding sparse minors. Among others, $\bullet$ $(1+o(1))t^2$ average degree is sufficient to force the $t\times t$ grid as a topological minor; $\bullet$ $(3/2+o(1))t$ average degree forces every $t$-vertex planar graph as a minor, and the constant $3/2$ is optimal, furthermore, surprisingly, the value is the same for $t$-vertex graphs embeddable on any fixed surface; $\bullet$ a universal bound of $(2+o(1))t$ on average degree forcing every $t$-vertex graph in any nontrivial minor-closed family as a minor, and the constant 2 is best possible by considering graphs with given treewidth.
description: 33 pages, 6 figures
Small flow rate can supply inwardly migrating shortest-period planets
Creators: name: Taylor, Stuart F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The number of exoplanets found with periods as short as one day and less was surprising given how fast these planets had been expected to migrate into the star due to the tides raised on the star by planets at such close distances. It has been seen as improbable that we would find planets in such a small final fraction of their lives. The favored solution has been that the tidal dissipation is much weaker than expected, which would mean that the final infall would be a larger fraction of the planets' life. We find no reason to exclude the explanation that a small number of planets are continuously sent migrating inwards such that these planets indeed are in the last fraction of their lives. Following the observation that the distribution of medium planets disfavors tidal dissipation being significantly weaker than has been found from observations of binary stars, we now show that the numbers of planets in such a "flow" of excess planets migrating inwards is low enough that even depletion of the three-day pileup is a plausible source. Then the shortest period occurrence distribution would be shaped by planets continuously being sent into the star, which may explain the depletion of the pileup in the Kepler field relative to the solar neighborhood (Howard et al. 2012, hereafter H12). Because Kepler observes above the galactic plane, H12 suggested the Kepler field may include an older population of stars. The tidal dissipation strength in stars due to giant planets may be not greatly weaker than it is in binary stars.
description: Four pages, four figures, submitted to Hot Planets Cold Stars conference (2012 November Garching, Germany)
Momentum-space signatures of Berry flux monopoles in a Weyl semimetal
Creators: name: Ünzelmann, M.
name: Bentmann, H.
name: Figgemeier, T.
name: Eck, P.
name: Neu, J. N.
name: Geldiyev, B.
name: Diekmann, F.
name: Rohlf, S.
name: Buck, J.
name: Hoesch, M.
name: Kalläne, M.
name: Rossnagel, K.
name: Thomale, R.
name: Siegrist, T.
name: Sangiovanni, G.
name: Di Sante, D.
name: Reinert, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Since the early days of Dirac flux quantization, magnetic monopoles have been sought after as a potential corollary of quantized electric charge. As opposed to magnetic monopoles embedded into the theory of electromagnetism, Weyl crystals exhibit Berry flux monopoles in reciprocal parameter space. As a function of crystal momentum, such monopoles locate at the degeneracy point of the Weyl cone. Here, we report momentum-resolved spectroscopic signatures of Berry flux monopoles in TaAs as a paradigmatic Weyl semimetal. We have probed the orbital and spin angular momentum (OAM and SAM) of the Weyl-fermion states by angle-resolved photoemission spectroscopy at bulk-sensitive soft X-ray energies (SX-ARPES) combined with photoelectron spin detection and circular dichroism. Supported by first-principles calculations, our measurements image characteristics of a topologically non-trivial winding of the OAM at the Weyl nodes and unveil a chirality-dependent SAM of the Weyl bands. Our results experimentally visualize the non-trivial momentum-space topology in a Weyl semimetal, promising to have profound implications for the study of quantum-geometric effects in solids.
Not All Poisons are Created Equal: Robust Training against Data Poisoning
Creators: name: Yang, Yu
name: Liu, Tian Yu
name: Mirzasoleiman, Baharan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Data poisoning causes misclassification of test time target examples by injecting maliciously crafted samples in the training data. Existing defenses are often effective only against a specific type of targeted attack, significantly degrade the generalization performance, or are prohibitive for standard deep learning pipelines. In this work, we propose an efficient defense mechanism that significantly reduces the success rate of various data poisoning attacks, and provides theoretical guarantees for the performance of the model. Targeted attacks work by adding bounded perturbations to a randomly selected subset of training data to match the targets' gradient or representation. We show that: (i) under bounded perturbations, only a number of poisons can be optimized to have a gradient that is close enough to that of the target and make the attack successful; (ii) such effective poisons move away from their original class and get isolated in the gradient space; (iii) dropping examples in low-density gradient regions during training can successfully eliminate the effective poisons, and guarantees similar training dynamics to that of training on full data. Our extensive experiments show that our method significantly decreases the success rate of state-of-the-art targeted attacks, including Gradient Matching and Bullseye Polytope, and easily scales to large datasets.
The cohomologies of the Iwasawa manifold and of its small deformations
Creators: name: Angella, Daniele
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57T15, 53C15, 32G05

description: We prove that, for some classes of complex nilmanifolds, the Bott-Chern cohomology is completely determined by the Lie algebra associated to the nilmanifold with the induced complex structure. We use these tools to compute the Bott-Chern and Aeppli cohomologies of the Iwasawa manifold and of its small deformations, completing the computations in arXiv:0709.3528v1 [math.AG] by M. Schweitzer.
description: to appear in J. Geom. Anal
Standortsökologie und Vergesellschaftung der Utricularia-Arten Nordwestdeutschlands
Creators: name: Hofmann, Klaus
Publisher: name: Hannover : Universität Hannover
Year: 2000
Subjects: subject: Utricularia
subject: hydrochemistry
subject: phytosociology
subject: Nordwestdeutschland
subject: Pflanzengesellschaft
subject: Pflanzenstandort
subject: Synökologie
subject: Wasserschlauch
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
title: Unsupervised-Learning Assisted Artificial Neural Network for Optimization
Creators: name: Kote, Varun
Publisher: name: Old Dominion University Libraries
Year: 2019

description: Innovations in computer technology made way for Computational Fluid Dynamics (CFD) into engineering, which supported the development of new designs by reducing the cost and time by lowering the dependency on experimentation. There is a further need to make the process of development more efficient. One such technology is Artificial Intelligence. In this thesis, we explore the application of Artificial Intelligence (AI) in CFD and how it can improve the process of development.

AI is used as a buzz word for the mechanism which can learn by itself and make the decision accordingly. Machine learning (ML) is a subset of AI which learns any method without the need for any explicit algorithm. Deep Learning is another subset of ML, which is different in its composition. Deep Learning, or Neural Networks (NN), is made up of nodes like the neurons and works on the principle of the human brain. NN can be exploited for any problem without the need for any explicit algorithm for the task. It can be achieved by analyzing and inferring from the observations. Artificial Neural Network (ANN) is used for data analysis and Convolutional Neural Networks (CNN) for image analysis. Our area of interest herein is ANN and its application for a medical equipment called Convective Polymerase Chain Reaction (cPCR) device.

Many have relied on engineering experimentation to develop an optimized PCR device, which requires high cost and time. That makes the use of PCR devices less cost-effective as a commonplace for healthcare. We optimize a convective PCR reactor using a high-fidelity CFD-based surrogate model to find an economical and performance-effective one. We plan numerous possible design combinations, evaluating DNA doubling time. Based on these results, an accurate surrogate model is developed for optimization using Deep Learning. We produce two kinds of surrogate models using ANN; one by directly employing ANN and another by using unsupervised learning called, k-Means-Clustering-Assisted ANN, and then compare the results from these two methods. For developing a suitable model of ANN to fit our data, we carry out the analysis of model accuracy and obtain the best design by using a differential evolution method. The best designs obtained by the two methods are verified with the corresponding result obtained from CFD. This shows an effective way of designing an optimized device by reducing the number of CFD simulations required for the development. Consequently, the computational results demonstrate that the convective PCR device can be efficiently developed using our proposed methodology, making it viable for point-of-care applications.
title: A Design of Inductive Coupling Wireless Power Transfer System for Electric Vehicle Applications
Creators: name: Daida, Sarika Reddy
Publisher: name: Old Dominion University Libraries
Year: 2019

description: This research focuses on the study of using an inductive-coupled Wireless Power Transfer (WPT) system for electric vehicle charging applications in Medium Voltage DC (MVDC) power networks. Implementing WPT in Electric Vehicles (EVs) can provide a convenient alternative charging option, versus static charging in a station that would take hours. Also, it can prevent the potential of electrocution hazards that might occur due to the usage of physical medium like wires in EV charging. Even though inductive coupling has been applied in some applications of WPT, it is still not efficient enough to transfer high power at the kilowatts level due to weak coupling between the transmitter and the receiver. Using optimally-specified resonant circuits along with inductive coupling can enhance the coupling and make the system more efficient for practical applications.

This research aims to design and analyze the performance of a 5-KW WPT circuit. The optimal specification of a resonant circuit is studied and discussed. Theoretical calculations are performed to find the component values in the circuit to reach. The WPT system is firstly verifiedmby performing simulation tests in the MATLAB/SIMULINK environment and then on a low power hardware testbed.
Timing interactions in social simulations: The voter model
Creators: name: Fernández-Gracia, Juan
name: Eguíluz, Víctor M.
name: Miguel, Maxi San
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The recent availability of huge high resolution datasets on human activities has revealed the heavy-tailed nature of the interevent time distributions. In social simulations of interacting agents the standard approach has been to use Poisson processes to update the state of the agents, which gives rise to very homogeneous activity patterns with a well defined characteristic interevent time. As a paradigmatic opinion model we investigate the voter model and review the standard update rules and propose two new update rules which are able to account for heterogeneous activity patterns. For the new update rules each node gets updated with a probability that depends on the time since the last event of the node, where an event can be an update attempt (exogenous update) or a change of state (endogenous update). We find that both update rules can give rise to power law interevent time distributions, although the endogenous one more robustly. Apart from that for the exogenous update rule and the standard update rules the voter model does not reach consensus in the infinite size limit, while for the endogenous update there exist a coarsening process that drives the system toward consensus configurations.
description: Book Chapter, 23 pages, 9 figures, 5 tables
Topological Insulators Avoid the Parity Anomaly
Creators: name: Mulligan, Michael
name: Burnell, F. J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The surface of a 3+1d topological insulator hosts an odd number of gapless Dirac fermions when charge conjugation and time-reversal symmetries are preserved. Viewed as a purely 2+1d system, this surface theory would necessarily explicitly break parity and time-reversal when coupled to a fluctuating gauge field. Here we explain why such a state can exist on the boundary of a 3+1d system without breaking these symmetries, even if the number of boundary components is odd. This is accomplished from two complementary perspectives: topological quantization conditions and regularization. We first discuss the conditions under which (continuous) large gauge transformations may exist when the theory lives on a boundary of a higher-dimensional spacetime. Next, we show how the higher-dimensional bulk theory is essential in providing a parity-invariant regularization of the theory living on the lower-dimensional boundary or defect.
description: 46 pages, 1 figure, harvmac
Effect of polymer structure on silica dispersion
Creators: name: Hayata, Daisuke
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2022
Subjects: subject: Functionalized S-SBR
subject: Filler dispersion
subject: Polymer-filler interaction
subject: Rubber reinforcing
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: embargoed
title: Endangered Species Act Section 7(a)(2) Biological Opinion, and Magnuson-Stevens Fishery Conservation and Management Act Essential Fish Habitat Response for the South Fork Eel River Bridge Seismic Retrofit Project in Humboldt County, California
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation
WCRO-2019-00401
Viola arenaria Ser.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: 0. arenaria (Kit.) Ser. (0. viciifolia Scop. ssp. arenariaThell.) var. Gaudiniana (Jordan) Cat. 78. Obere Höhengrenze festzustellen (vermutlich um1600m). l: Les Marques bei Martigny (J.). - 2: Isieres (Beauverd); Valere und Tourbillon bei Sitten (J.); ob Rotafer östlichLeuk (Kunz). - 3:Charrat (Closuit); ob Riddes (J.); Clebe (J.); Vernamiege (Pannatier); Törbel (Stehler).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
title: 2018 Update to “A risk assesment of potential Great Lakes aquatic invaders”
titleType: AlternativeTitle
Creators: name: Lower, El
name: Boucher, Nicholas
name: Alsip, Peter
name: Davidson, Alisha
name: Sturtevant, Rochelle A.
Publisher: name: Michigan Sea Grant Program University of Michigan Wayne State University Great Lakes Environmental Research Laboratory
Year: 2019

description: NOAA Technical Memorandum GLERL ; 169b
A curious relation between the flat cosmological model and the elliptic integral of the first kind
Creators: name: Meszaros, A.
name: Ripa, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The dependence of the luminosity distance on the redshift has a key importance in the cosmology. This dependence can well be given by standard functions for the zero cosmological constant. The purpose of this article is to present such a relation also for the non-zero cosmological constant, if the universe is spatially flat. A definite integral is used. The integration ends in the elliptic integral of the first kind. The result shows that no numerical integration is needed for the non-zero cosmological constant, if the universe is spatially flat.
description: Accepted for publication in Astronomy & Astrophysics. 2 pages
New solid proton conductors : functionalized mesoporous SiO2 materials for application in high temperature PEM fuel cell membranes
Creators: name: Marschall, Roland
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Fuel cells
subject: mesoporous materials
subject: proton conductivity
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: [no abstract]
New dioxa and oxaza-tricyclononanes and study of their biological activity
Creators: name: Vidal Pascual, María
Publisher: name: Hannover : Universität
Year: 2003
Subjects: subject: Oxetane
subject: C-glycoside
subject: scopoline
subject: pharmacological activity
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
On Asymptotic Log-Optimal Buy-and-Hold Strategy
Creators: name: Hsieh, Chung-Han
Publisher: name: arXiv
Year: 2021
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Computational Finance (q-fin.CP)
subject: Mathematical Finance (q-fin.MF)
subject: FOS: Economics and business

description: In this paper, we consider a frequency-based portfolio optimization problem with $m \geq 2$ assets when the expected logarithmic growth (ELG) rate of wealth is used as the performance metric. With the aid of the notion called dominant asset, it is known that the optimal ELG level is achieved by investing all available funds on that asset. However, such an "all-in" strategy is arguably too risky to implement in practice. Motivated by this issue, we study the case where the portfolio weights are chosen in a rather ad-hoc manner and a buy-and-hold strategy is subsequently used. Then we show that, if the underlying portfolio contains a dominant asset, buy and hold on that specific asset is asymptotically log-optimal with a sublinear rate of convergence. This result also extends to the scenario where a trader either does not have a probabilistic model for the returns or does not trust a model obtained from historical data. To be more specific, we show that if a market contains a dominant asset, buy and hold a market portfolio involving nonzero weights for each asset is asymptotically log-optimal. Additionally, this paper also includes a conjecture regarding the property called high-frequency maximality. That is, in the absence of transaction costs, high-frequency rebalancing is unbeatable in the ELG sense. Support for the conjecture, involving a lemma for a weak version of the conjecture, is provided. This conjecture, if true, enables us to improve the log-optimality result obtained previously. Finally, a result that indicates a way regarding an issue about when should one to rebalance their portfolio if needed, is also provided. Examples, some involving simulations with historical data, are also provided along the way to illustrate the~theory.
Magnetic flux tuning of Fano-Kondo interplay in a parallel double quantum dot system
Creators: name: Agundez, R. R.
name: Verduijn, J.
name: Rogge, S.
name: Blaauboer, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the Fano-Kondo interplay in an Aharonov-Bohm ring with an embedded non-interacting quantum dot and a Coulomb interacting quantum dot. Using a slave-boson mean-field approximation we diagonalize the Hamiltonian via scattering matrix theory, and derive the conductance in the form of a Fano expression, which depends on the mean field parameters. We predict that in the Kondo regime the magnetic field leads to a gapped energy level spectrum due to hybridisation of the non-interacting QD state and the Kondo state, and can quantum-mechanically alter the electron's path preference. We demonstrate that an abrupt symmetry change in the Fano resonance, as seen experimentally, could be a consequence of an underlying Kondo channel.
title: Endangered Species Act Section 7(a)(2) Biological Opinion Office of Naval Research (ONR) Arctic Research Activities 2018-2021 and Associated Proposed Issuance of an Incidental Harassment Authorization in the Beaufort Sea, Alaska
titleType: Other
Creators: name: United States. National Marine Fisheries Service
Publisher: name: United States. National Marine Fisheries Service
Year: 2019

description: ESA Section 7 Consultation ; AKRO-2019-00688
Red clump stars of the Milky Way - laboratories of extra-mixing
Creators: name: Tautvaišienė, G.
name: Barisevičius, G.
name: Chorniy, Y.
name: Ilyin, I.
name: Puzeras, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this work we present the main atmospheric parameters, carbon, nitrogen and oxygen abundances, and 12C/13C ratios determined in a sample of 28 Galactic clump stars. Abundances of carbon were studied using the C2 band at 5086.2 Å. The wavelength interval 7980-8130 Å with strong CN features was analysed in order to determine nitrogen abundances and 12C/13C isotope ratios. The oxygen abundances were determined from the [O I] line at 6300 Å. The mean abundances of C, N and O abundances in the investigated clump stars support our previous estimations that, compared to the Sun and dwarf stars of the Galactic disc, carbon is depleted by about 0.2 dex, nitrogen is enhanced by 0.2 dex and oxygen is close to abundances in dwarfs. The 12C/13C and C/N ratios for galactic red clump stars analysed were compared to the evolutionary models of extra-mixing. The steeper drop of 12C/13C ratio in the model of thermohaline mixing by Charbonnel & Lagarde better reflects the observational data at low stellar masses than the more shallow model of cool bottom processing by Boothroyd & Sackmann. For stars of about 2 Msun masses a modelling of rotationally induced mixing should be considered with rotation of about 250 km s-1 at the time when a star was at the hydrogen-core-burning stage.
description: 8 pages, 7 figures, published in MNRAS 03/2013. arXiv admin note: substantial text overlap with arXiv:1007.4064
title: Titel
Creators: name: Redaktion, Die
Publisher: name: University Library Heidelberg
Year: 2016

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 50 (2016): KulturGut: aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004
Riemann-Roch coefficients for Kleinian orbisurfaces
Creators: name: Lim, Bronson
name: Rota, Franco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14C40

description: Suppose $\mathcal{S}$ is a smooth, proper, and tame Deligne-Mumford stack. Toën's Grothendieck-Riemann-Roch theorem requires correction terms, involving components of the inertia stack, to the standard formula for schemes. We give a brief overview of Toën's Grothendieck-Riemann-Roch theorem, and explicitly compute the correction terms in the case of an orbifold surface with stabilizers of types ADE.
description: V1: 10 pages. This work originates from the appendix of arxiv:2001.09139 (not included in forthcoming new version), now expanded and turned into independent submission. All comments welcome! V2: 13 pages, added an exposition of the Riemann-Roch theorem for Deligne-Mumford stacks aimed at non-experts. To appear in Bollettino dell'Unione Matematica Italiana
Infant Sleep and Parent Health Literacy
Creators: name: Dreyer, Benard
name: Cerra, Maria
name: Yin, H. Shonna
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2016

description: Child sleep problems are prevalent and have been linked to poor behavior, worse school performance, and obesity. Low health literacy (HL) is associated with suboptimal parenting practices and worse health outcomes, but the relationship between parent HL and child sleep-related issues is not known. We examined the association between parent HL and child sleep-related issues.
title: Das Modell eines murus gallicus aus dem 19. Jahrhundert
Creators: name: Springer, Tobias
Publisher: name: University Library Heidelberg
Year: 2016

description: KulturGut : aus der Forschung des Germanischen Nationalmuseums, Nr. 50 (2016): KulturGut: aus der Forschung des Germanischen Nationalmuseums, Beginn und Erscheinungsfrequenz: Jahr: 2004