cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Creutz Fermions on an Orthogonal Lattice
Creators: name: Borici, Artan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In a recent paper, Creutz has given a new action describing two species of Dirac fermions with exact chiral symmetry on the lattice. This action depends on a parameter which may be fixed at a certain value in order to get the right continuum limit. In this letter, we elaborate more on this idea and present an action which is free of any other parameter except the fermion mass.
description: 9 pages, version to be published in PRD
Comments on frequency dependent ac conductivity in polymeric materials at low frequency regime
Creators: name: Tsonos, Christos
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The AC conductivity response in a broad frequency range of disordered materials is of great interest not only for technological applications, but also from a theoretical point of view. The Jonscher power exponent value, and its temperature dependence, is a very important parameter in dielectric data analysis as well as the physical interpretation of conduction mechanisms in disordered materials. In some cases the power exponent of AC conductivity has been reported to be greater than 1 at the low frequency regime. This fact seems to contradict the universal dynamic response. The present work focuses on the analysis of dielectric spectroscopy measurements in polymeric materials, below 100 MHz. The apparent power exponent n gets values in the range (0,1) and is directly related to the characteristics of mobile charges at shorter time scales, in the case of the occurrence of DC conduction and the slowest polarization mechanism that is due to the charge motions within sort length scales, in log(epsilon'')-log(frequenvy) plot. The emergence of apparent n values in the range [1,2], for a relatively narrow frequency range, may be attributed to an additional molecular dipolar relaxation contribution at higher frequencies, in log(epsilon'')-log(frequency) plot. The appearance of apparent n values in the range (1,2], can be assigned to the existence of a well defined minimum between DC conductivity contribution and a molecular dipolar dispersion or between two well separated dielectric loss mechanisms, in log(epsilon'')-log(frequency) plots, above the crossover frequency. In these latter cases, the apparent power exponent n is merely related to the Havriliak-Negami equation shape parameters of the higher frequencies molecular dipolar relaxations.
description: 28 pages, 3 figures
S1_SUPPLEMENTARY_TEMPLATE_Bethune_etal_2021_FEE
Creators: name: Bethune, Elehna
name: Schulz-Kornas, Ellen
name: Lehnert, Kristina
name: Siebert, Ursula
name: Kaiser, Thomas M.
Publisher: name: Universität Hamburg
Year: 2021

description: This is the description of the template used for microwear texture data analysis in the publication “Tooth microwear texture in the Eastern Atlantic harbour seals (Phoca vitulina vitulina) of the German Wadden Sea and its implications for long term dietary and ecosystem changes” by Elehna Bethune, Ellen Schulz-Kornas, Kristina Lehnert, Ursula Siebert and ThomasM. Kaiser, published in Frontiers of Ecology and Evolution on 17 Mar 2021 available via DOI: 10.3389/fevo.2021.644019. Surface measurements originally used with this template (*.mnt file) were saved as *.nms files and were deposited for at least 10 years at the Research Data Repository of the University of Hamburg, Germany (DOI: 10.25592/uhhfdm.8979).
DeepTriangle: A Deep Learning Approach to Loss Reserving
Creators: name: Kuo, Kevin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Applications (stat.AP)
subject: Machine Learning (cs.LG)
subject: Risk Management (q-fin.RM)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: We propose a novel approach for loss reserving based on deep neural networks. The approach allows for joint modeling of paid losses and claims outstanding, and incorporation of heterogeneous inputs. We validate the models on loss reserving data across lines of business, and show that they improve on the predictive accuracy of existing stochastic methods. The models require minimal feature engineering and expert input, and can be automated to produce forecasts more frequently than manual workflows.
description: Published version available at https://www.mdpi.com/2227-9091/7/3/97
A fundamental computer science course that unifies theory and practice
Creators: name: Flon, Lawrence
name: Hilfinger, Paul
name: Shaw, Mary
name: Wulf, William A.
Publisher: name: Carnegie Mellon University
Year: 1978
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: If computer programming is to become an "engineering discipline," computer science students must acquire the tools for rigorous analysis and evaluation of programs. An early course in the undergraduate curriculum must introduce the fundamental principles of the discipline, just as freshman calculus teaches the basic analysis skills for most engineering disciplines. The course described in this paper teaches mathematical principles and practical programming applications in a unified form. It has been successfully taught to sophomores for four years.
A Note on Graviton Amplitudes for New Twistor String Theories
Creators: name: Nair, V. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A new class of twistor string theories were recently constructed by Abou-Zeid, Hull and Mason. The most interesting one of these theories has the particle content of N=8 supergravity. Arguments are given for the vanishing of the (+ - -)-helicity amplitude for gravitons which suggest that this theory describes a chiral N=8 supergravity rather than Einstein supergravity.
description: 10 pages
Optimal linear responses for Markov chains and stochastically perturbed dynamical systems
Creators: name: Antown, Fadi
name: Dragičević, Davor
name: Froyland, Gary
Publisher: name: arXiv
Year: 2018
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The linear response of a dynamical system refers to changes to properties of the system when small external perturbations are applied. We consider the little-studied question of selecting an optimal perturbation so as to (i) maximise the linear response of the equilibrium distribution of the system, (ii) maximise the linear response of the expectation of a specified observable, and (iii) maximise the linear response of the rate of convergence of the system to the equilibrium distribution. We also consider the inhomogeneous or time-dependent situation where the governing dynamics is not stationary and one wishes to select a sequence of small perturbations so as to maximise the overall linear response at some terminal time. We develop the theory for finite-state Markov chains, provide explicit solutions for some illustrative examples, and numerically apply our theory to stochastically perturbed dynamical systems, where the Markov chain is replaced by a matrix representation of an approximate annealed transfer operator for the random dynamical system.
title: NITROGEN SULFIDE (NS) IN STAR FORMING REGIONS
Creators: name: MCGONAGLE, D
name: Irvine, William M.
name: MINH, Y
Publisher: name: University of Massachusetts Amherst
Year: 1992
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1992IAUS..150..227M
description: We report a survey for nitrogen sulfide (NS) toward regions of massive star formation. NS was observed by means of its 2 pi 1/2, J = 3/2 --> 1/2, J = 5/2 --> 3/2, and J = 7/2 --> 5/2 transitions at 69, 115, and 161 GHz, respectively, and was detected toward 12 of 14 giant molecular clouds (GMCs) observed. Analysis of the hyperfine component relative line strengths suggests that NS emission is optically thin toward these sources, with the possible exception of Sgr B2(M). The fractional abundance of NS relative to molecular hydrogen is best defined for the Orion molecular cloud, where it is typically (1-4) x 10(-10), which is about an order of magnitude larger than found by some recent gas-phase chemistry models developed for quiescent clouds. Toward OMC-1, the NS integrated intensity is strongly peaked toward KL, but also extends all along the Orion ridge, resembling the distribution of SO and CH3OH. We have identified a spectral feature seen toward several sources as the ortho-NKK = 4(04) --> 3(13) J = 3 --> 2, fine-structure component of methylene (CH2; cf. Hollis, Jewell, & Lovas). We also report the first detection of the SO+ 2 pi 1/2, J = 3/2 --> 1/2, parity-e transition toward W51(MS) and L134N.
A framework for synthesis of human gait oscillation using Intelligent Gait Oscillation Detector (IGOD)
Creators: name: Soumik  Mondal
name: Anup  Nandy
name: Anirban  Chakrabarti
name: Pavan  Chakraborty
name: Gora  Nandi
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: The main objective of this paper illustrates an elementary concept about the designing, development and implementation of a bio-informatics diagnostic tool which understands and analyzes the human gait oscillation in order to provide an insight on human bi-pedal locomotion and its stability. A multi sensor device for detection of gait oscillations during human locomotion has been developed effectively. It has been named “IGOD”, an acronym of the “Intelligent Gait Oscillation Detector”. It ensures capturing of different person’s walking pattern in a very elegant way. This device would be used for creating a database of gait oscillations which could be extensively applied in several implications. The preliminary acquired data for eight major joints of a human body have been presented significantly. The electronic circuit has been attached to IGOD device in order to customize the proper calibration of every joint angle eventually.
CATCM
Creators: name: Hartmann, Jochen
name: Heitmann, Mark
name: Schamp, Christina
name: Huppertz, Juliana
Publisher: name: Universität Hamburg
Year: 2021

description: Comparing automated text classification methods (CATCM) International Journal of Research in Marketing 36(1) October 2018 DOI: 10.1016/j.ijresmar.2018.09.009
A Framework for Scalable Analysis and Design of System-wide Graceful Degradation in Distributed Embedded Systems
Creators: name: Shelton, Charles
name: Koopman, Philip
name: Nace, William
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: We present a framework that will enable scalable analysis and design of graceful degradation in distributed embedded systems. We define graceful degradation in terms of utility. A system that gracefully degrades suffers a proportional loss of system utility as individual software and hardware components fail. However, explicitly designing a system to gracefully degrade; i.e. handle all possible combinations of component failures, becomes impractical for systems with more than a few components. We avoid this exponential complexity of component combinations by exploiting the structure of the system architecture to partition components into subsystems. We view each subsystem as a configuration of components that changes when components are removed or added. Thus, a subsystem's utility changes when components fail or are repaired. We then view the system as a composition of subsystems that each contribute to overall system utility. We demonstrate the scalability of our framework by applying it to an example automobile navigation system. Using this framework, we aim to improve system dependability by identifying architectural properties that enhance a system's ability to gracefully degrade.
title: Neurological instability post-infection: What’s involved?
Creators: name: El Ouati, Achraf
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Paediatric radiology
subject: CNS
subject: Paediatric
subject: CT
subject: MR
subject: Treatment effects
subject: Acute
subject: Clinical Case

description: Clinical History: This concerns a 5-year-old girl with no particular medical history. In January, she developed hepatitis A, followed by a gradual decrease in visual acuity three weeks later, accompanied by headaches and dizziness (left facial paraesthesias?). All of this occurred in an afebrile context with stage II papilledema observed on fundoscopy. An urgent cerebral CT scan was requested.

description: 5 years, female
Experiences in Teaching Prospective Research Software Engineers at the University of Chicago
Creators: name: Spreadbury, Trevor
name: Greer, Launa
name: Nief, Todd
Publisher: name: Zenodo
Year: 2024
Subjects: research software engineering
software engineering pedagogy
project-based learning

description: In comparison to traditional software engineers, research software engineers (RSEs) often come to software engineering from scientific domains and may lack formal training. As the field continues to develop, direct educational pathways and formal training are likely to expand. Questions about best practices for training students and early career RSEs must be answered to ensure new RSEs are able to contribute high quality code. How should we train students with minimal experience to work on real-world projects? How do we bridge the gap between classroom learning and the expectations of writing reproducible code? What assumptions can be made about what students can (and should) learn themselves, and what do they need to be explicitly taught? The University of Chicago’s Data Science Institute has been able to wrestle with these questions over the past three years by engaging with students via its experiential, project-based, Data Science Clinic course. 

 

The Data Science Clinic is a useful setting for asking these questions and testing related hypotheses. The clinic works with 3 cohorts of students each year and typically has more than 50 students per cohort. This provides a great environment for iterating on best practices. Preparing students who are interested in research software engineering careers is similar to training early-career RSEs who are coming from backgrounds with limited computer science education. Students in the clinic come from diverse backgrounds, with both master’s and undergraduate students well-represented, but most have one university computer science course. This level of formal computer science background is similar to many RSEs coming from non-computer science backgrounds. Additionally, code reproducibility and code quality are often lower priorities on both student projects and RSE projects.

 

The Data Science Clinic has led to the important conclusion that relying on assumptions about student background knowledge leads to negative outcomes. When using experiential learning or project-based classes, it's easy to have a biased view of student understanding since only the most confident and engaged students are likely to volunteer to participate. These advanced students can shoulder most of the load of a project and make quite a bit of progress, while allowing the students who would gain the most from direct instruction to coast undetected. In reality, many students lack robust mental models of computer operation, familiarity with essential terms and concepts, and an appreciation for software engineering best practices. Overcoming these challenges requires significant investment from experienced mentors. 

 

The purpose of this talk is to share these lessons and conclusions, discuss why these problems are so difficult, and to consider next steps.
Multi-tiling and equidecomposability of polytopes by lattice translates
Creators: name: Lev, Nir
name: Liu, Bochen
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Classical Analysis and ODEs (math.CA)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52B11, 52B45, 52C22

description: We characterize the polytopes in $\mathbb{R}^d$ (not necessarily convex or connected ones) which multi-tile the space by translations along a given lattice. We also give a necessary and sufficient condition for two polytopes in $\mathbb{R}^d$ to be equidecomposable by lattice translations.
description: To appear in the Bulletin of the London Mathematical Society
Städte im Klimawandel
Creators: name: Lozán, José L.
name: Breckle, Siegmar-W.
name: Graßl, Hartmut
name: Kasang, Dieter
name: Matzarakis, Andreas
Publisher: name: Universität Hamburg
Year: 2019
Subjects: Stadtklima, Bodenversiegelungsgrad, Luftfeuchtigkeitsverhältnisse, Windsverhältnisse, Niederschlagsverhältnisse, Abwärme, Luftverunreinigungen

description: Städte weisen im Vergleich zu ihrem Umland erhebliche klimatische Unterschiede auf. Es herrschen in Städten andere Temperatur-, Wind-, Niederschlags- und Luftfeuchtigkeitsverhältnisse als in ihrem Umland. Wie intensiv die Unterschiede sind, ist nicht nur von der Größe der Stadt und der geographischen Lage, sondern auch von mehreren anderen Faktoren abhängig. Hierzu gehören der Bodenversiegelungsgrad, die Emission von Abwärme, Luftverunreinigungen durch Haushalte, Verkehr und Industrie sowie die Verteilung und Dichte bebauter Flächen. Das Stadtklima ist von der WMO (World Meteorological Organization) als gegenüber dem Umland anthropogen verändertes Lokalklima definiert. Aufgrund der Bevölkerungsentwicklung werden die Städte größer, und damit nimmt auch der klimatische Unterschied zwischen Stadt und Umland zu.
A Framework for Reasoning About the Human in the Loop
Creators: name: Cranor, Lorrie F
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Many secure systems rely on a “human in the loop” to perform security-critical functions. However, humans often fail in their security roles. Whenever possible, secure system designers should find ways of keeping humans out of the loop. However, there are some tasks for which feasible or cost effective alternatives to humans are not available. In these cases secure system designers should engineer their systems to support the humans in the loop and maximize their chances of performing their security-critical functions successfully. We propose a framework for reasoning about the human in the loop that provides a systematic approach to identifying potential causes for human failure. This framework can be used by system designers to identify problem areas before a system is built and proactively address deficiencies. System operators can also use this framework to analyze the root cause of security failures that have been attributed to “human error.” We provide examples to illustrate the applicability of this framework to a variety of secure systems design problems, including anti-phishing warnings and password policies.
Recent insights into the world of dual‐function bacterial sRNAs
Creators: name: Schnoor, Sebastian Benjamin
name: Neubauer, Peter
name: Gimpel, Matthias
Publisher: name: Wiley
Year: 2023
Subjects: subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie
subject: dual-function sRNA
subject: riboregulation
subject: small regulatory RNAs
subject: sRNA encoded peptide

description: Dual-function sRNAs refer to a small subgroup of small regulatory RNAs that merges base-pairing properties of antisense RNAs with peptide-encoding properties of mRNA. Both functions can be part of either same or in another metabolic pathway. Here, we want to update the knowledge of to the already known dual-function sRNAs and review the six new sRNAs found since 2017 regarding their structure, functional mechanisms, evolutionary conservation, and role in the regulation of distinct biological/physiological processes. The increasing identification of dual-function sRNAs through bioinformatics approaches, RNomics and RNA-sequencing and the associated increase in regulatory understanding will likely continue to increase at the same rate in the future. This may improve our understanding of the physiology, virulence and resistance of bacteria, as well as enable their use in technical applications.
Infinite transitivity, finite generation, and Demazure roots
Creators: name: Arzhantsev, I
name: Kuyumzhiyan, K
name: Zaidenberg, M
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14R20, 32M17

description: An affine algebraic variety X of dimension at least 2 is called flexible if the subgroup SAut(X) in Aut(X) generated by the one-parameter unipotent subgroups acts m-transitively on reg(X) for any m $\ge$ 1. In the previous paper we proved that any nondegenerate toric affine variety X is flexible. In the present paper we show that one can find a subgroup of SAut(X) generated by a finite number of one-parameter unipotent subgroups which has the same transitivity property, provided the toric variety X is smooth in codimension 2. For X=$\mathbb{A}^n$ with n$\ge$2, three such subgroups suffice.
description: 25 pages
On Normal Modes of a Warped Throat
Creators: name: Benna, Marcus K.
name: Dymarsky, Anatoly
name: Klebanov, Igor R.
name: Solovyov, Alexander
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As shown in arXiv:hep-th/0405282, the warped deformed conifold has two bosonic massless modes, a pseudoscalar and a scalar, that are dual to the phase and the modulus of the baryonic condensates in the cascading gauge theory. We reconsider the scalar mode sector, mixing fluctuations of the NS-NS 2-form and the metric, and include non-zero 4-d momentum $k_μ$. The resulting pair of coupled equations produce a discrete spectrum of $m_4^2=- k_μ^2$ which is interpreted as the spectrum of $J^{PC}= 0^{+-}$ glueballs in the gauge theory. Similarly, we derive the spectrum of certain pseudoscalar glueballs with $J^{PC}= 0^{--}$, which originate from the decoupled fluctuations of the RR 2-form. We argue that each of the massive scalar or pseudoscalar modes we find belongs to a 4-d massive axial vector or vector supermultiplet. We also discuss our results in the context of a finite length throat embedded into a type IIB flux compactification.
description: LaTeX, 29 pages, 4 eps figures
Estimation of the mechanical properties of the eye through the study of its vibrational modes
Creators: name: Aloy, M. A.
name: Adsuara, J. E.
name: Cerdá-Durán, P.
name: Obergaulinger, M.
name: Esteve-Taboada, J. J.
name: Ferrer-Blasco, T.
name: Montés-Micó, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Medical Physics (physics.med-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Measuring the eye's mechanical properties in vivo and with minimally invasive techniques can be the key for individualized solutions to a number of eye pathologies. The development of such techniques largely relies on a computational modelling of the eyeball and, it optimally requires the synergic interplay between experimentation and numerical simulation. In Astrophysics and Geophysics the remote measurement of structural properties of the systems of their realm is performed on the basis of (helio-)seismic techniques. As a biomechanical system, the eyeball possesses normal vibrational modes encompassing rich information about its structure and mechanical properties. However, the integral analysis of the eyeball vibrational modes has not been performed yet. Here we develop a new finite difference method to compute both the spheroidal and, specially, the toroidal eigenfrequencies of the human eye. Using this numerical model, we show that the vibrational eigenfrequencies of the human eye fall in the interval 100 Hz - 10 MHz. We find that compressible vibrational modes may release a trace on high frequency changes of the intraocular pressure, while incompressible normal modes could be registered analyzing the scattering pattern that the motions of the vitreous humour leave on the retina. Existing contact lenses with embebed devices operating at high sampling frequency could be used to register the microfluctuations of the eyeball shape we obtain. We advance that an inverse problem to obtain the mechanical properties of a given eye (e.g., Young's modulus, Poisson ratio) measuring its normal frequencies is doable. These measurements can be done using non-invasive techniques, opening very interesting perspectives to estimate the mechanical properties of eyes in vivo. Future research might relate various ocular pathologies with anomalies in measured vibrational frequencies of the eye.
description: Published in PLoS ONE as Open Access Research Article. 17 pages, 5 color figures
Nachlass Edwin Fischer
Creators: name: Zentral- und Hochschulbibliothek Luzern
Publisher: name: Zentral- und Hochschulbibliothek Luzern
Year: 2024
Subjects: Nachlass
Fischer, Edwin

description: Findbuch zum Nachlass Edwin Fischer
Der Nachlass umfasst Enthält: Eigene Werke, Bearbeitungen, Korrespondenz, Tagebücher, Dokumente der privaten Lebensführung, Konzertprogramme, Material zu Meisterkursen und Lehrtätigkeit, Fotografien, Sammlungen
Nachlass Edwin Fischer, Inventar der Schenkung an die Zentralbibliothek, 1983. Betschart, Andrea, Verzeichnis der Tonaufnahmen im Nachlass Edwin Fischer an der Zentralbibliothek Luzern, Luzern, 1993.
Umfang: 6.0 Lfm
description: Standort: [ZHB] Sempacherstrasse / Luzern (Tresor BB), Signatur: Ms.N.59
Higher frequencies do not enhance muscle force during fatigue
Creators: name: Jun, Byung Geun
Publisher: name: The University of Texas at Austin
Year: 2004
Subjects: Muscle contraction
Functional electrical stimulation

description: During contractions elicited by electrical stimulation before and after a voluntary fatigue task, significantly more force is lost at high versus low frequencies. This phenomenon has been termed 'low frequency fatigue'. The purpose of this study was to determine if progressively increasing the stimulation frequency during contraction would increase overall force output and reduce the rate of fatigue. This technique artificially generated neural activity in order to overcome lost functions of paralyzed, incontinent or sensory impaired persons. The study compared force and EMG parameters during a constant frequency train of 20Hz for 3 minutes to a train that increased linearly from 20Hz to 40Hz over the same time period. Ten subjects participated in this study and performed the two fatigue tests on different days. Six of the subjects returned for a third experiment to determine changes in the force frequency relation after a 3 minute voluntary sustained isometric fatiguing contraction of 45% maximum voluntary contraction (MVC). The force-frequency relationship shifted to the right with fatigue and significantly more force was lost at the low frequency than at the high frequencies. During the fatigue task experiments, average maximal voluntary contraction force (20 Hz: 47.8 ± 5.0N, 20-40 Hz: 53.2 ± 5.2 N) and the starting force at 20 Hz (20 Hz: 22.9 ± 3.1 N, 20-40 Hz: 23.3 ± 2.4 N) did not differ between experiment days. Surprisingly, there was no significant difference in the overall force time integral (20Hz: 3.25 ± 0.04 KNs, 20-40Hz: 3.40 ± 0.05 KNs) for the two stimulation protocols or the peak force at the end of the 3 min evoked contraction (20 Hz: 8.2 ± 1.8 N, 20-40 Hz: 7.6 ± 1.1 N). These data indicate that the force output is highly dependent on the starting frequency and minimally affected by the number of stimulation pulses delivered (20 Hz: 3600 pulses, 20-40 Hz: 5400 pulses) when stimulating within the physiological range.
Class number formula for dihedral extensions
Creators: name: Caputo, Luca
name: Nuccio, Filippo A. E.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11R29, 11R20, 11R34

description: We give an algebraic proof of a class number formula for dihedral extensions of number fields of degree $2q$, where $q$ is any odd integer. Our formula expresses the ratio of class numbers as a ratio of orders of cohomology groups of units and recovers similar formulas which have appeared in the literature as special cases. As a corollary of our main result we obtain explicit bounds on the (finitely many) possible values which can occur as ratio of class numbers in dihedral extensions. Such bounds are obtained by arithmetic means, without resorting to deep integral representation theory.
description: This is the version to appear in the Glasgow Mathematical Journal. All references and theorem numbering coincide with that of the published version
A Framework for Interactive and Automatic Refinement of Transfer-based Machine Translation
Creators: name: Llitjós, Ariadna Font
name: Carbonell, Jaime G.
name: Lavie, Alon
Publisher: name: Carnegie Mellon University
Year: 2005
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Most current Machine Translation (MT) systems do not improve with feedback from post-editors beyond the addition of corrected translations to parallel training data (for statistical and example-base MT) or to a memory database. Rule based systems to date improve only via manual debugging. In contrast, we propose a largely automated method for capturing more information from human post-editors, so that corrections may be performed automatically to translation grammar rules and lexical entries. This paper introduces a general framework for incorporating a refinement module into rule-based transfer MT systems. This framework allows for generalizing post-editing efforts in an effective way, by identifying and correcting rules semi-automatically on order to improve coverage and overall translation quality.
Regularization of fields for self-force problems in curved spacetime: foundations and a time-domain application
Creators: name: Vega, Ian
name: Detweiler, Steven
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose an approach for the calculation of self-forces, energy fluxes and waveforms arising from moving point charges in curved spacetimes. As opposed to mode-sum schemes that regularize the self-force derived from the singular retarded field, this approach regularizes the retarded field itself. The singular part of the retarded field is first analytically identified and removed, yielding a finite, differentiable remainder from which the self-force is easily calculated. This regular remainder solves a wave equation which enjoys the benefit of having a non-singular source. Solving this wave equation for the remainder completely avoids the calculation of the singular retarded field along with the attendant difficulties associated with numerically modeling a delta function source. From this differentiable remainder one may compute the self-force, the energy flux, and also a waveform which reflects the effects of the self-force. As a test of principle, we implement this method using a 4th-order (1+1) code, and calculate the self-force for the simple case of a scalar charge moving in a circular orbit around a Schwarzschild black hole. We achieve agreement with frequency-domain results to ~ 0.1% or better.
description: 15 pages, 12 figures, 1 table. More figures, extended summary
Digital Twinning for 6G Teleoperated Driving: The 6G-TWIN Vision
Creators: name: Turcanu, Ion
name: Faye, Sébastien
name: Fellner, Horst
name: Castellanos, German
name: Baudouin, Julien
name: Senouci, Sidi Mohammed
name: Franke, Mario
name: Sommer, Christoph
Publisher: name: Zenodo
Year: 2024

description: Previous efforts focusing on 5G support for teleoperated driving mainly targeted communication challenges and goals, developing and evaluating key 5G enabling technologies such as network slicing, seamless cross-border roaming, Multi- access Edge Computing (MEC) enabled distributed computing, or predictive Quality of Service/Experience (QoS or QoE). However, these goals are at odds with energy conservation, with energy savings being a major goal of modern mobile broadband networks. This poses significant challenges, calling for new thinking and new system architectures that go beyond the current 5G Service- Based Architecture (SBA). In this paper, we present the vision of the European 6G-TWIN project for leveraging digital twins to provide a safe and efficient communication infrastructure for teleoperated driving, along with a demonstrator design to validate the project’s solutions.
Monte Carlo simulations of Germanium detector efficiency curves
Creators: name: Jackman, Kevin Richard
Publisher: name: The University of Texas at Austin
Year: 2004
Subjects: Germanium detectors
Monte Carlo method

description: The use of Germanium detectors to study gamma-rays has become common practice in most modern science laboratories. These detectors often need to be calibrated and characterized for different gamma-ray source geometries, energies, and source-to-detector distances. The use of Monte Carlo based simulations allows one to perform these characterizations in the absence of radioactive material and for arbitrary experimental setups. The usefulness of these simulations and Monte Carlo based codes for modeling Germanium detector efficiencies is studied here. Two C language programs have also been written to perform analysis of efficiency curves and multiple decay components.
Stadtklima: Einführung, Charakteristika, Nachweismöglichkeiten
Creators: name: Kuttler, Wilhelm
Publisher: name: Universität Hamburg
Year: 2019
Subjects: Urban climate, actinic, thermal and hydrological effects, rural environment, urban heat island, city environment

description: Der Beitrag stellt die Charakteristika des Stadtklimas heraus und beschäftigt sich insbesondere mit den Unterschieden bei Strahlung, Temperatur und Wasserhaushalt, die sich zwischen Stadt und Umland ergeben. Am Beispiel der Energiebilanz wird der besondere Einfluss urbaner Flächen auf die bodennahe Grenzschicht erläutert. Anhand der städtischen Wärmeinsel (UHI) wird gezeigt, welche Temperaturunterschiede in thermischer Hinsicht zwischen Stadt und Umland auftreten. Um Klimaeffekte der Stadt nachweisen zu können, werden verschiedene Möglichkeiten beschrieben und diskutiert. In einem Ausblick wird auf die sich durch den Klimawandel ergebenden Probleme eingegangen und es werden Gegenmaßnahmen auf lokaler Ebene benannt. Urban climate: introduction, characteristics, estimation of urban effects:The paper highlights the characteristics of the urban climate and deals in particular with the actinic, thermal and hydrological differences that arise between a city and its surroundings. Using the energy balance as an example, the special influence of urban areas on the atmospheric boundary layer is explained. Based on the urban heat island (UHI) phenomenon the qualitative differences between a city and its rural environment in thermal terms are shown. In order to be able to demonstrate urban climatic characteristics, various possibilities are described and discussed for separating the urban climatic effect from that of the surrounding area. In an outlook, the problems arising from global climate change are addressed and countermeasures at the local level are named.
Cosmological Backreaction from Perturbations
Creators: name: Behrend, Juliane
name: Brown, Iain A.
name: Robbers, Georg
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We reformulate the averaged Einstein equations in a form suitable for use with Newtonian gauge linear perturbation theory and track the size of the modifications to standard Robertson-Walker evolution on the largest scales as a function of redshift for both Einstein de-Sitter and Lambda CDM cosmologies. In both cases the effective energy density arising from linear perturbations is of the order of 10^-5 the matter density, as would be expected, with an effective equation of state w ~ -1/19. Employing a modified Halofit code to extend our results to quasilinear scales, we find that, while larger, the deviations from Robertson-Walker behaviour remain of the order of 10^-5.
description: 15 pages, 8 figures; replaced by version accepted by JCAP
Terms of reference for the working group 'Establishing FAIR infrastructure'
Creators: name: Danish e-Infrastructure Consortium (DeiC)
Publisher: name: Zenodo
Year: 2024
Subjects: FAIR principles
National Strategy
Denmark

description: Terms of reference for the working group 'Establishing FAIR infrastructure' in connection with the National Strategy for Data Management based on the FAIR principles. 

The working group is established based on the ‘Remit and Terms of Reference for the Reference group for the implementation of the National Strategy for Data Management Based on the FAIR Principles’.
On compositions of numbers and graphs
Creators: name: Kwasniewski, A. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C20, 11C08, 17B56

description: The main purpose of this note is to pose a couple of problems which are easily formulated thought some seem to be not yet solved. These problems are of general interest for discrete mathematics including a new twig of a bough of theory of graphs i.e. a given graph compositions. The problems result from and are served in the entourage of series of exercises with hints based predominantly on the second reference and other related recent papers.
description: 12 pages, 4 figures
A Framework for Classifying Scientific Metadata
Creators: name: Galhardas, Helena
name: Simon, Eric
name: Tomasic, Anthony
Publisher: name: Carnegie Mellon University
Year: 1998
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: The scientific community, public organizations and administrations have generated a large amount of data concerning the environment. There is a need to allow sharing and exchange of this type of information by various kinds of users including scientists, decision-makers and public authorities. Metadata arises as the solution to support these requirements. We present a formal framework for classification of metadata that will give a uniform definition of what metadata is, how it can be used and where it must be used. This framework also provides a procedure for classifying elements of existing metadata standards.
The Determinants of Entrepreneurship at the Country Level: A Panel Data Approach
Creators: name: Brás, Gonçalo Rodrigues
name: Soukiazis, Elias
Publisher: name: Zenodo
Year: 2015
Subjects: total entrepreneurial activity (TEA), opportunity-driven entrepreneurship, necessity-driven entrepreneurship, determinants of entrepreneurship, panel data

description: The aim of this presentation is to analyze the impact of a variety of factors on the total entrepreneurial activity rate
 (TEA). A panel data approach of 26 developed countries was used to evaluate the simultaneous influence of
 the factors on TEA (2004–2011). Our findings show an inverse relationship between TEA and the initial capital
 effort; a direct relation between TEA, monetary freedom, investment freedom, financial market development
 and education; and a nonlinear concave relationship between TEA and the GDP per capita. The dynamic estimation
 approach shows a high speed of adjustment between the actual and desired rate of entrepreneurship.
 Overall, the main findings clarify which potential determinants have a real impact on entrepreneurial activity.
 Our contribution aims to help economic policymakers in developed countries to gain awareness of the main
 determinants of entrepreneurial activity at country level and thus to enable better decisions.
A Flexible Approach to Embedded Network Multicast Authentication
Creators: name: Szilagy, Chris
name: Koopman, Philip
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Distributed embedded systems are becoming increasingly vulnerable to attack as they are connected to external networks. Unfortunately, they often have no built-in authentication capability. Multicast authentication mechanisms required to secure embedded networks must function within the unique constraints of these systems, making it difficult to apply previously proposed schemes. We propose an authentication approach using message authentication codes which exploits the time-triggered nature of many embedded systems by putting only a few authentication code bits in each message, and by requiring authentication to be confirmed by the correct reception of multiple messages. This approach can work for both state transition commands and reactive control messages, and enables a tradeoff among per-message authentication cost, application-level latency, and the probability of induced system failure. Authentication parameters can be tuned on a per-message basis while satisfying typical wired embedded network constraints.
Optical coupling between resonant dielectric nanoparticles and dielectric waveguides probed by third harmonic generation microscopy
Creators: name: Okhlopkov, Kirill I.
name: Ezhov, Alexander A.
name: Shafirin, Pavel
name: Orlikovsky, Nikolay A.
name: Shcherbakov, Maxim R.
name: Fedyanin, Andrey A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Localized electromagnetic modes and negligible Ohmic losses dictate the growing interest in subwavelength all-dielectric nanoparticles. Although an exhaustive volume of study dealt with interaction of all-dielectric nanostructures with free-space electromagnetic fields, their performance as integrated photonics elements remains untackled. We present an experimental study of optical coupling between a resonant subwavelength silicon nanodisk and a non-resonant silicon waveguide, as probed by third harmonic generation microscopy. By placing the nanodisks at different distances from the waveguide, we observe third harmonic intensity modulation by a factor of up to 4.5. This modulation is assigned to changes in the local field enhancement within the nanodisks caused by their coupling to the waveguides and subsequent modulation of their magnetic-type resonances. Interestingly, although the waveguide presents an additional loss channel for the nanodisk, we observe an increase in the local field strength within the nanodisk, as verified by rigorous full-wave simulations. This work makes a step toward integration of all-dielectric nanoparticles on photonic chips.
description: 5 pages, 3 figures
Structural and Superconducting Properties of RbOs2O6 Single Crystals
Creators: name: Rogacki, K.
name: Schuck, G.
name: Bukowski, Z.
name: Zhigadlo, N. D.
name: Karpinski, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Single crystals of RbOs2O6 have been grown from Rb2O and Os in sealed quartz ampoules. The crystal structure has been identified at room temperature as cubic with the lattice constant a = 10.1242(12) A. The anisotropy of the tetrahedral and octahedral networks is lower and the displacement parameters of alkali metal atoms are smaller than for KOs2O6, so the "rattling" of the alkali atoms in RbOs2O6 is less pronounced. Superconducting properties of RbOs2O6 in the mixed state have been well described within the London approach and the Ginzburg-Landau parameter kappa(0) = 31 has been derived from the reversible magnetization. This parameter is field dependent and changes at low temperatures from kappa = 22 (low fields) to kappa = 31 at H_{c2}. The thermodynamic critical field H_{c}(0) = 1.3 kOe and the superconducting gap 2delta/k_{B}T_{c} = 3.2 have been estimated. These results together with slightly different H_{c2}(T) dependence obtained for crystals and polycrystalline RbOs2O6 proof evidently that this compound is a weak-coupling BCS-type superconductor close to the dirty limit.
description: 20 pages, 8 figures, 3 tables
title: ADCO, Troisième cartulaire de Saint-Étienne de Dijon (XVIe), Cart. 23 (G 127), 310 folios, f. 00435
Creators: name: de la Côte d'Or, Archives départementales
name: Petot, Frédéric
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2011
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge

description: Troisième cartulaire de Saint-Étienne de Dijon (XVIe), Archives départementales de la Côte-d'Or, Cart. 23 (G 127), 310 folios, f. 00435, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Troisième cartulaire de Saint-Étienne de Dijon (XVIe), Archives départementales de la Côte-d'Or, Cart. 23 (G 127), 310 folios, f. 00435, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
Black Holes in Supergravity: the non-BPS Branch
Creators: name: Gimon, Eric G.
name: Larsen, Finn
name: Simon, Joan
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct extremal, spherically symmetric black hole solutions to 4D supergravity with charge assignments that preclude BPS-saturation. In particular, we determine the ground state energy as a function of charges and moduli. We find that the mass of the non-BPS black hole remains that of a marginal bound state of four basic constituents throughout the entire moduli space and that there is always a non-zero gap above the BPS bound.
description: 29 pages, one appendix, no figures; v2. few comments and references added and a missing sign included; v3. further references added
Unsupervised Domain Adaptation with Adversarial Residual Transform Networks
Creators: name: Cai, Guanyu
name: Wang, Yuqin
name: Zhou, Mengchu
name: He, Lianghua
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Domain adaptation is widely used in learning problems lacking labels. Recent studies show that deep adversarial domain adaptation models can make markable improvements in performance, which include symmetric and asymmetric architectures. However, the former has poor generalization ability whereas the latter is very hard to train. In this paper, we propose a novel adversarial domain adaptation method named Adversarial Residual Transform Networks (ARTNs) to improve the generalization ability, which directly transforms the source features into the space of target features. In this model, residual connections are used to share features and adversarial loss is reconstructed, thus making the model more generalized and easier to train. Moreover, a special regularization term is added to the loss function to alleviate a vanishing gradient problem, which enables its training process stable. A series of experiments based on Amazon review dataset, digits datasets and Office-31 image datasets are conducted to show that the proposed ARTN can be comparable with the methods of the state-of-the-art.
description: accepted by IEEE Transactions on Neural Networks and Learning Systems