cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Geometric Characterization of Series-Parallel Variable Resistor Networks
Creators: name: Bryant, Randal E.
name: J. D. Tygar
name: Huang, Lawrence P.
Publisher: name: Carnegie Mellon University
Year: 1985
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The range of operating conditions for a series-parallel network of variable linear resistors, voltage sources, and current sources can be represented as a convex polygon in a Thevenin or Norton half-plane. For a network with n elements of which k are variable, these polygons have at most 2k vertices and can be computed in O(nk) time. These half planes are embedded in the real projective plane to represent circuits with potentially infinite Thevenin resistance or Norton conductance. For circuits that have an acyclic structure once all branches to ground are removed, the characteristic polygons for all nodes with respect to ground can be computed simultaneously by an algorithm of complexity O(nk).
Cell-less Communications in 5G Vehicular Networks Based on Vehicle-Installed Access Points
Creators: name: Wang, Lijun
name: Han, Tao
name: Li, Qiang
name: Yan, Jia
name: Liu, Xiong
name: Deng, Dexiang
Publisher: name: arXiv
Year: 2018
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: The development of intelligent transportation systems raises many requirements to the current vehicular networks. For instance, to ensure secure communications between vehicles, low latency, high connectivity and high data rate are required for vehicular networks. To meet such requirements, the 5G communication systems for vehicular networks should be improved accordingly. This article proposes a communication scheme for 5G vehicular networks, in which moving access points are deployed on vehicles to facilitate the access of vehicle users. Moreover, the adjacent vehicle-installed moving access points may cooperatively communicate with the vehicle users by joint transmissions and receptions. In this way, the vehicle users communicate with one or more unspecified cooperative access points in a cell-less manner instead of being associated to a single access point. To manage such cell-less networks, local moving software-defined cloudlets are adopted to perform transmission and scheduling management. Simulation results show that the proposed scheme significantly reduces the latency, while improving the connectivity of the vehicular networks, and can be considered as a research direction for the solution to 5G vehicular networks.
description: 20 pages, 6 figures, accepted by IEEE Wireless Communications
WHEN THE OFFICE WENT HOME: RESPONDING TO EMERGING RISKS AND OPPORTUNITIES
Creators: name: SAMBU, ERIC KIBET
Publisher: name: Zenodo
Year: 2024

description: Abstract: COVID-19 is a pandemic that is currently ravaging the world, with unprecedented disruptions being witnessed. Many governments have imposed restrictions on movement and several measures to contain its spread, including social and physical distancing, hence directive to work from home. This has disrupted the office, as it used to be, with little time to prepare for the sudden change. Working from home poses new risks and opportunities for organisation and it is imperative that the board effectively manage this to sustain organisation’s operations. Using exploratory research design, this paper reviews these risks and opportunities and hence the practicable options in managing them amidst the pandemic. Key to this is the ability to learn, in line with absorptive capacity theory. It finds that the board can no longer rely on traditional risk management techniques, given the speed of digital transformation, but it underscores the critical importance of strategic risk management. This paper concludes that developing adoptive capacity to exploit emerging mechanisms in teleworking is inevitable and combining risk and compliance management in corporate government is key to corporate resilience and competitive advantage.

Keywords: COVID-19 Pandemic, Working from Home (WFH), Risk Management.

Title: WHEN THE OFFICE WENT HOME: RESPONDING TO EMERGING RISKS AND OPPORTUNITIES

Author: Eric Sambu

International Journal of Interdisciplinary Research and Innovations

ISSN 2348-1218 (print), ISSN 2348-1226 (online)

Vol. 12, Issue 1, January 2024 - March 2024

Page No: 29-43

Research Publish Journals

Website: www.researchpublish.com

Published Date: 22-February-2024

DOI: https://doi.org/10.5281/zenodo.10691764
3D-Visualisierung des Kohortenkastells Arnsburg ›Alteburg‹
Creators: name: Mückenberger, Kai
Publisher: name: Denkmal Hessen
Year: 2021

description: Mit der Präsentation und Aufstellung eines 3D-Aluminiumsandguss-Geländemodelle des ehemaligen Römerkastells Arnsburg ›Alteburg‹ wird ein Projekt abgeschlossen, das die Abteilung hessenARCHÄOLOGIE in den letzten vier Jahren fachlich begleitet hat.
description: Denkmal Hessen, Nr. 1 (2021)
Extinction transition in stochastic population dynamics in a random, convective environment
Creators: name: Juhász, Róbert
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Motivated by modeling the dynamics of a population living in a flowing medium where the environmental factors are random in space, we have studied an asymmetric variant of the one-dimensional contact process, where the quenched random reproduction rates are systematically greater in one direction than in the opposite one. The spatial disorder turns out to be a relevant perturbation but, according to results of Monte Carlo simulations, the behavior of the model at the extinction transition is different from the (infinite randomness) critical behavior of the disordered, symmetric contact process. Depending on the strength $a$ of the asymmetry, the critical population drifts either with a finite velocity or with an asymptotically vanishing velocity as $x(t)\sim t^{μ(a)}$, where $μ(a)<1$. Dynamical quantities are non-self-averaging at the extinction transition; the survival probability, for instance, shows multiscaling, i.e. it is characterized by a broad spectrum of effective exponents. For a sufficiently weak asymmetry, a Griffiths phase appears below the extinction transition, where the survival probability decays as a non-universal power of the time while, above the transition, another extended phase emerges, where the front of the population advances anomalously with a diffusion exponent continuously varying with the control parameter.
description: 23 pages, 11 figures, typo corrected
Cosmological Inflation in a Generalized Unimodular Gravity
Creators: name: Nozari, K.
name: Shafizadeh, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study some aspects of cosmological inflation in the framework of unimodular $f(R)$ gravity. To be more clarified, we consider a generic $f(R)$ of the type $f(R)=R+αR^{n}$. By considering Einstein frame counterpart of the unimodular $f(R)$ gravity, we set the scalaron to be responsible for cosmological inflation in this setup. We confront our model parameters space with observational data and impose some constraints on the value of $n$ in this manner. We show that for the number of e-folds $N=60$, the model is consistent with observation if $1.89
description: 14 pages, 2 figures
Generating Remote Control Interfaces for Complex Appliances
Creators: name: Nichols, Jeffrey
name: Myers, Brad
name: Harris, Thomas K
name: Rosenfeld, Roni
name: Pignol, Mathilde
name: Higgins, Michael
name: Hughes, Joseph
Publisher: name: Carnegie Mellon University
Year: 1966
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: The personal universal controller (PUC) is a remote control device for improving the interfaces to complex appliances. The PUC engages in two-way communication with everyday appliances, first downloading a specification of the appliance’s functions, and then automatically creating an interface for controlling that appliance. The specification of each appliance includes a high-level description of every function, a hierarchical grouping of those functions, and dependency information, which relates the availability of each function to the appliance’s state. Dependency information makes it easier for designers to create specifications and helps the automatic interface generators produce a higher quality result. We describe the architecture that supports the PUC, and the interface generators that use our specification language to generate graphical and speech interfaces.
Patient and Family Advisory Councils for Research Recruiting and Supporting Members From Diverse and Hard-to-Reach Communities
Creators: name: Harrison, James D.
name: Anderson, Wendy G.
name: Fagan, Maureen
name: Robinson, Edmondo
name: Auerbach, Andrew D.
name: Symczak, Gina
name: Schnepper, Jeffrey
name: Hanson, Catherine
name: Carnie, Martha B.
name: Banta, Jim
name: Chen, Sherry
name: Duong, Jonathan
name: Wong, Celene
Publisher: name: Health Research Alliance
Year: 2024
Subjects: classificationCode: 420399
subject: Health services and systems not elsewhere classified

description: To describe strategies to recruit and support
members from hard-to-reach groups on research-focused
Patient and Family Advisory Councils (PFACs).
Sousa, Filomena (coord.) (2021) "Inventories & Intangible Cultural Heritage (ICH) Survey – Database SPSS
Creators: name: Sousa, Filomena (coord)
Publisher: name: Zenodo
Year: 2021
Subjects: Inventories, Intangible Cultural Heritage

description: Inventories & Intangible Cultural Heritage (ICH) Survey – Database SPSS
On decoupling inequalities and percolation of excursion sets of the Gaussian free field
Creators: name: Popov, Serguei
name: Rath, Balazs
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We prove decoupling inequalities for the Gaussian free field on $\mathbb{Z}^d$, $d\geq 3$. As an application, we obtain exponential decay (with logarithmic correction for $d=3$) of the connectivity function of excursion sets for large values of the threshold.
description: 12 pages
Deliverable No. 8.9 Second report on the content and extent of joint activities with collaborators in USA and Canada
Creators: name: Cristini, Luisa
name: Jung, Thomas
name: Ortega, Pablo
name: Day, Jonathan
name: Sandu, Irina
name: Køltzow, Morten
name: Blockley, Ed
name: Smith, Doug
name: Massonnet, François
name: Svensson, Gunilla
name: Msadek, Rym
name: Schneider, Andrea
Publisher: name: Zenodo
Year: 2019

description: There are a number of collaborations between APPLICATE partners and groups in the USA and Canada. Effective clustering for these activities happens both in terms of science coordination as well as at scientific levels. As part of WP8 on Clustering scientific collaborations that are directly or indirectly related to the project activities have been tracked. This document, the second of three reports, contains a non-exhaustive list of activities as reported by APPLICATE partners on their current and most significant engagements with collaborators from North America.
title: 02_0158
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
The weakly dependent strong law of large numbers revisited
Creators: name: Abdesselam, Abdelmalek
Publisher: name: arXiv
Year: 2018
Subjects: subject: Probability (math.PR)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 60F15

description: We give a short, self-contained, and elementary proof of the strong law of large numbers under a power law decay hypothesis for joint second moments. The result is related to the classical one by Lyons. However, we also provide a rate of convergence. Our proof does not use maximal inequalities and is instead inspired by the method of multiscale large versus small field decompositions in constructive quantum field theory.
description: 5 pages, 1 figure
Highly sensitive refractometer with photonic crystal fiber long-period grating
Creators: name: Rindorf, Lars
name: Bang, Ole
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present highly sensitive refractometers based on a long-period grating in a large mode area PCF. The maximum sensitivity is 1500 nm/RIU at a refractive index of 1.33, the highest reported for any fiber grating. The minimal detectable index change is $2\times 10^{-5}$. The high sensitivity is obtained by infiltrating the sample into the holes of the photonic crystal fiber to give a strong interaction between the sample and the probing field.
description: 4 pages, 3 figures, journal paper, submitted
Concurrence and a proper monogamy inequality for arbitrary quantum states
Creators: name: Ou, Yong-Cheng
name: Fan, Heng
name: Fei, Shao-Ming
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We obtain an analytical lower bound of entanglement quantified by concurrence for arbitrary bipartite quantum states. It is shown that our bound is tight for some mixed states and is complementary to the previous known lower bounds. On the other hand, it is known that the entanglement monogamy inequality proposed by Coffman, Kundu, and Wootters is in general not true for higher dimensional quantum states. Inducing from the new lower bound of concurrence, we find a proper form of entanglement monogamy inequality for arbitrary quantum states.
description: 4 pages, Theorem 2 was rephrased
MOESM3 of Maternal milk and fecal microbes guide the spatiotemporal development of mucosa-associated microbiota and barrier function in the porcine neonatal gut
Creators: name: Liu, Hongbin
name: Zeng, Xiangfang
name: Zhang, Guolong
name: Hou, Chengli
name: Li, Ning
name: Yu, Haitao
name: Shang, Lijun
name: Zhang, Xiaoya
name: Trevisi, Paolo
name: Yang, Feiyun
name: Liu, Zuohua
name: Qiao, Shiyan
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 3: Figure S3. (A) Negligible influence of breed on the mucosa-associated microbiota at birth. Average weighted UniFrac, unweighted UniFrac and Bray-Curtis distance between individuals at birth within and between Rongchang and Landrace piglets. (B) Shift of α diversity of mucosa-associated microbiota with age across four intestinal segments based on Chao1 index (Values are Means ± SE; significance between groups was determined by Kruskal-Wallis test).
Additional file 1 of Determinants of mortality status and population attributable risk fractions of the North West Province, South African site of the international PURE study
Creators: name: Ricci, Cristian
name: Kruger, Iolanthe M.
name: Kruger, Herculina S.
name: Breet, Yolandi
name: Moss, Sarah J.
name: van Oort, Abie
name: Bester, Petra
name: Pieters, Marlien
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified

description: Supplementary Material 1
X-Ray Observations of the Galactic Center with Suzaku
Creators: name: Koyama, K.
name: Hyodo, Y.
name: Inui, T.
name: Nobukawa, M.
name: Mori, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the diffuse X-ray emissions from the Galactic center (GCDX) observed with the X-ray Imaging Spectrometer (XIS) on board the Suzaku satellite. The highly accurate energy calibrations and extremely low background of the XIS provide many new facts on the GCDX. These are (1) the origin of the 6.7/7.0keV lines is collisional excitation in hot plasma, (2) new SNR and super-bubble candidates are found, (3) most of the 6.4keV line is fluorescence by X-rays, and (4) time variability of the 6.4keV line is found from the SgrB2 complex.
description: 4 pages, 6 figure, proceedings of the XMM-Newton workshop, June 2007, accepted for publication in AN
Clean Os(0001) electronic surface states: a first-principle fully relativistic investigation
Creators: name: Urru, Andrea
name: Corso, Andrea Dal
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We analyze the electronic structure of the Os(0001) surface by means of first-principle calculations based on Fully Relativistic (FR) Density Functional Theory (DFT) and a Projector Augmented-Wave (PAW) approach. We investigate surface states and resonances analyzing their spin-orbit induced energy splitting and their spin polarization. The results are compared with previously studied surfaces Ir(111), Pt(111), and Au(111). We do not find any surface state in the gap similar to the L-gap of the (111) fcc surfaces, but find Rashba split resonances that cross the Fermi level and, as in the recently studied Ir(111) surface, have a characteristic downward dispersion. Moreover, for some selected surface states we study the spin polarization with respect to ${\bf k}_{\parallel}$, the wave-vector parallel to the surface. In some cases, such as the Rashba split resonances, the spin polarization shows a smooth behavior with slow rotations, in others the rotation is faster, due to mixing and anti-crossing of the states.
description: 17 pages, 10 figures
Generalizing Metamodules to Simplify Planning in Modular Robotic Systems
Creators: name: Dewey, Daniel J
name: Ashley-Rollman, Michael P.
name: Rosa, Michael De
name: Goldstein, Seth C.
name: Mowry, Todd C.
name: Siddartha S. Srinivasa
name: Padmanabhan  Pillai
name: Campbell, Jason
Publisher: name: Carnegie Mellon University
Year: 1985
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: In this paper we develop a theory of metamodules and an associated distributed asynchronous planner which generalizes previous work on metamodules for lattice-based modular robotic systems. All extant modular robotic systems have some form of non-holonomic motion constraints. This has prompted many researchers to look to metamodules, i.e., groups of modules that act as a unit, as a way to reduce motion constraints and the complexity of planning. However, previous metamodule designs have been specific to a particular modular robot. By analyzing the constraints found in modular robotic systems we develop a holonomic metamodule which has two important properties: (1) it can be used as the basic unit of an efficient planner and (2) it can be instantiated by a wide variety of different underlying modular robots, e.g., modular robot arms, expanding cubes, hex-packed spheres, etc. Using a series of transformations we show that our practical metamodule system has a provably complete planner. Finally, our approach allows the task of shape transformation to be separated into a planning task and a resource allocation task. We implement our planner for two different metamodule systems and show that the time to completion scales linearly with the diameter of the ensemble.
Homotopy colimits of classifying spaces of abelian subgroups of a finite group
Creators: name: Okay, Cihan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: The classifying space BG of a topological group $G$ can be filtered by a sequence of subspaces $B(q,G)$, using the descending central series of free groups. If $G$ is finite, describing them as homotopy colimits is convenient when applying homotopy theoretic methods. In this paper we introduce natural subspaces $B(q,G)_p$ of $B(q,G)$ defined for a fixed prime $p$. We show that $B(q,G)$ is stably homotopy equivalent to a wedge of $B(q,G)_p$ as $p$ runs over the primes dividing the order of $G$. Colimits of abelian groups play an important role in understanding the homotopy type of these spaces. Extraspecial $2$-groups are key examples, for which these colimits turn out to be finite. We prove that for extraspecial 2-groups, $B(2,G)$ does not have the homotopy type of a $K(π,1)$ space. For a finite group $G$, we compute the complex K-theory of $B(2,G)$ modulo torsion.
Uis tailings, Namibia: a potential resource for high-technology metals
Creators: name: Lohmeier, Stephanie Gertrud
name: Schirmer, Thomas
name: Lottermoser, Bernd G.
Publisher: name: RWTH Aachen University
Year: 2020
Subjects: AIMS;International Exchange;Mineral Resources, Future Generations; Mining Conference, RWTH Aachen

description: Abstracts of the First International Conference Mineral Resources for Future Generations (AIMS 2020) : 02 & 03 April 2020, Aachen, Germany / Publisher & Editor: Prof. Dr. Bernd Lottermoser, Institute of Mineral Resources Engineering, RWTH Aachen University 1st International Conference Mineral Resources for Future Generations, AIMS 2020, Aachen, Germany, 4 Feb 2020 - 3 Apr 2020; Aachen : Institute of Mineral Resources Engineering, RWTH Aachen University Poster-014, 53-53 (2020).
description: Published by Institute of Mineral Resources Engineering, RWTH Aachen University, Aachen
Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves
Creators: name: Lebed, A. A.
name: Padusenko, E. A.
name: Roshchupkin, S. P.
name: Dubov, V. V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Resonant spontaneous bremsstrahlung of an electron scattered by a nucleus in the field of two moderately strong pulsed laser waves is studied theoretically. The process is studied in detail within the interference kinematic region. This region is determined by scattering of particles in the same plane at predetermined angles, at that stimulated absorption and emission of photons of external pulsed waves by an electron occurs in correlated manner. The correspondence between the emission angle and the final-electron energy is established in the kinematic region where the resonant parametric interference effect is manifested. The resonant differential cross section of ENSB process with simultaneous registration of both emission angles of the spontaneous photon and the scattered electron, can exceed by 4-5 orders of magnitude the corresponding cross section in the absence of an external field. It was shown for nonrelativistic electrons that the resonant cross section of ENSB in the field of two pulsed laser waves within the interference region in two order of magnitude may exceed corresponding cross section in the Bunkin-Fedorov kinematic region. The obtained results may be experimentally verified, for example, by scientific facilities at sources of pulsed laser radiation (SLAC, FAIR, XFEL, ELI).
Additional file 1 of Facilitating islet transplantation using a three-step approach with mesenchymal stem cells, encapsulation, and pulsed focused ultrasound
Creators: name: Razavi, Mehdi
name: Ren, Tanchen
name: Zheng, Fengyang
name: Telichko, Arsenii
name: Wang, Jing
name: Dahl, Jeremy J.
name: Demirci, Utkan
name: Thakor, Avnesh S.
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Hematology
subject: Virology
subject: Computational Biology

description: Additional file 1.
A Finite Soluble Quotient Algorithm
Creators: name: Niemeyer, Alice C.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20D10, 20-04

description: An algorithm for computing power conjugate presentations for finite soluble quotients of predetermined structure of finitely presented groups is described. Practical aspects of an implementation are discussed.
Generalizing Halfspaces
Creators: name: Fink, Eugene
name: Wood, Derick
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Restricted-orientation convexity is the study of geometric objects whose intersection with lines from some fixed set is empty or connected. We have studied the properties of restricted-orientation convex sets and demonstrated that this notion is a generalization of standard convexity. We now describe a restricted-orientation generalization of halfspaces and explore properties of these generalized halfspaces. In particular, we establish analogs of the following properties of standard halfspaces: -The intersection of a halfspace with every line is empty, a ray, or a line - Every halfspace is convex - A closed set with nonempty interior and convex boundary is a halfspace - The closure of the complement of a halfspace is a halfspace
Weighted Sobolev L2 estimates for a class of Fourier integral operators
Creators: name: Ruzhansky, Michael
name: Sugimoto, Mitsuru
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 35S30, 47G30, 35J10, 35G10, 35B65

description: In this paper we develop elements of the global calculus of Fourier integral operators in $R^n$ under minimal decay assumptions on phases and amplitudes. We also establish global weighted Sobolev $L^2$ estimates for a class of Fourier integral operators that appears in the analysis of global smoothing problems for dispersive partial differential equations. As an application, we exhibit a new type of smoothing estimates for hyperbolic equations, where the decay of data in space is quantitatively translated into the time decay of solutions.
description: 27 pages
Observations and three-dimensional ionization structure of the planetary nebula SuWt 2
Creators: name: Danehkar, Ashkbiz
name: Parker, Quentin A.
name: Ercolano, Barbara
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The planetary nebula SuWt 2 (PN G311.0+02.4), is an unusual object with a prominent, inclined central emission ellipse and faint bipolar extensions. It has two A-type stars in a proven binary system at the centre. However, the radiation from these two central stars is too soft to ionize the surrounding material leading to a so far fruitless search for the responsible ionizing source. Such a source is clearly required and has already been inferred to exist via an observed temporal variation of the centre-of-mass velocity of the A-type stars. Moreover, the ejected nebula is nitrogen-rich which raises question about the mass-loss process from a likely intermediate-mass progenitor. We use optical integral-field spectroscopy to study the emission lines of the inner nebula ring. This has enabled us to perform an empirical analysis of the optical collisionally excited lines, together with a fully three-dimensional photoionization modelling. Our empirical results are used to constrain the photoionization models, which determine the evolutionary stage of the responsible ionizing source and its likely progenitor. The time-scale for the evolutionary track of a hydrogen-rich model atmosphere is inconsistent with the dynamical age obtained for the ring. This suggests that the central star has undergone a very late thermal pulse. We conclude that the ionizing star could be hydrogen-deficient and compatible with what is known as a PG 1159-type star. The evolutionary tracks for the very late thermal pulse models imply a central star mass of ~ 0.64M${}_{\odot}$, which originated from a ~ 3M${}_{\odot}$ progenitor. The evolutionary time-scales suggest that the central star left the asymptotic giant branch about 25,000 years ago, which is consistent with the nebula's age.
description: 18 pages, 11 figures, 10 tables, proof corrections applied
title: Προσομοίωση συστήματος γεωεναλλακτών σε πραγματικές συνθήκες για θέρμανση-ψύξη κτηρίου γραφείων
title: Borehole heat exchangers system simulation for heating and cooling office spaces
Creators: name: Κουτελιδακης Ανδρεας
Publisher: name: Technical University of Crete
Year: 2021

description: ΄Ενας σηµαντικός παράγοντας για τον άρτιο σχεδιασµό και την επιτυχή εγκατάσταση ενός συστήµατος αβαθούς γεωθερµίας αποτελεί η αξιόπιστη προσοµοίωση του συστήµατος µαζί µε τη διεξαγωγή της δοκιµής ϑερµικής απόκρισης εδάφους. Αντικείµενο της παρούσας µεταπτυχιακής εργασίας αποτελεί η µοντελοποίηση, παραµετροποίηση και υλοποίηση προσοµοιώσεων συστηµάτων αβαθούς γεωθερµίας χρησιµοποιώντας το λογισµικό ανοικτού κώδικα OpenGeoSys. Το λογισµικό αυτό επιτρέπει την προσοµοίωση της
λειτουργίας συστηµάτων αβαθούς γεωθερµίας από τους µηχανικούς εφαρµόζοντας σύγχρονες αριθµητικές µεθόδους επίλυσης προβληµάτων αρχικών και συνοριακών τιµών, όπως αυτές έχουν υλοποιηθεί σε σύγχρονες µαθηµατικές ϐιβλιοθήκες. Επίσης η διεξαγωγή των επιστηµονικών υπολογισµών των αριθµητικών µεθόδων µπορεί να υλοποιηθεί στα πλέον σύγχρονα υπολογιστικά περιβάλλοντα.
Η µεταπτυχιακή εργασία αποτελείται από τα παρακάτω τέσσερα κεφάλαια :
Στο πρώτο κεφάλαιο, παρουσιάζονται οι ϐασικές έννοιες της γεωθερµίας καθώς και των συστηµάτων αβαθούς γεωθερµίας. Επίσης συνοπτικά περιγράφεται η λειτουργία των αντλιών ϑερµότητας και ιδιαίτερα των γεωθερµικών αντλιών.
Το δεύτερο κεφάλαιο αναφέρεται στο λογισµικό OpenGeoSys για την προσοµοίωση της λειτουργίας συστηµάτων αβαθούς γεωθερµίας. Περιγράφεται η διαδικασία εισαγωγής του προβλήµατος διάδοσης ϑερµότητας κατά τη λειτουργία του γήινου εναλλάκτη ϑερµότητας καθώς και του συνολικού δικτύου συστήµατος αβαθούς γεωθερµίας.
Στο τρίτο κεφάλαιο παρουσιάζεται η µοντελοποίηση και η διαδικασία προσοµοίωσης της δοκιµής ϑερµικής απόκρισης ενός συστήµατος αβαθούς γεωθερµίας για την προσέγγιση v των ϑερµικών παραµέτρων του εδάφους µε την χρήση του λογισµικού OpenGeoSys. Στη συνέχεια περιγράφεται το σύστηµα αβαθούς γεωθερµίας του ΚΑΠΕ, του οποίου προσοµοιώθηκε η δοκιµή ϑερµικής απόκρισης των γεωεναλλακτών του καθώς και η συνολική διαδικασία ψύξης ϑέρµανσης του συστήµατος.
Τέλος, στο τέταρτο κεφάλαιο γίνεται αναφορά στα συµπεράσµατα που προέκυψαν από τη χρήση του λογισµικού OpenGeoSys για την προσοµοίωση της δοκιµής ϑερµικής απόκρισης και της λειτουργίας συστηµάτων αβαθούς γεωθερµίας.
On the breakdown of the simple Arrhenius law in the normal liquid state
Creators: name: Thoms, Erik
name: Grzybowski, Andrzej
name: Pawlus, Sebastian
name: Paluch, Marian
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: It is common practice to discuss the temperature effect on molecular dynamics of glass formers above the melting temperature in terms of the Arrhenius law. Using dielectric spectroscopy measurements of dc-conductivity and structural relaxation time on the example of the typical glass former propylene carbonate, we provide experimental evidence that this practice is not justified. Our conclusions are supported by employing thermodynamic density scaling and the occurrence of inflection points in isothermal dynamic data measured at elevated pressure. Additionally, we propose a more suitable approach to describe the dynamics both above and below the inflection point based upon a modified MYEGA model.
description: 5 pages, 3 figures
Some ergonomic assessments of the design and use of short-duration self-contained breathing apparatus
Creators: name: Davies, John
Publisher: name: Loughborough University
Year: 2021
Subjects: subject: 120399 Design Practice and Management not elsewhere classified
subject: FOS: Arts (arts, history of arts, performing arts, music)

description: Some ergonomic assessments of the design and use of short-duration self-contained breathing apparatus
Coherence-enhanced, phase-dependent dissipation in long SNS Josephson junctions: revealing Andreev Bound States dynamics
Creators: name: Dassonneville, Bastien
name: Murani, Anil
name: Ferrier, Meydi
name: Guéron, Sophie
name: Bouchiat, Hélène
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: One of the best known causes of dissipation in ac driven quantum systems stems from photon absorption. Dissipation can also be caused by the retarded response to the time-dependent excitation, and in general gives insight into the system's relaxation times and mechanisms. We address the dissipation in a mesoscopic normal wire with superconducting contacts, that sustains a supercurrent at zero frequency and that may be expected to remain dissipationless at frequency lower than the superconducting gap. We probe the high frequency linear response of a Normal/Superconductor ring to a time-dependent flux by coupling it to a highly sensitive multimode microwave resonator. Far from being the simple derivative of the current-phase relation, the ring's ac susceptibility also displays a dissipative component whose phase dependence is a signature of the dynamical processes occurring within the Andreev spectrum. We show how dissipation is driven by the competition between the two aforementioned mechanisms. Depending on the relative strength of those contributions, dissipation can be maximal at $π$, when the minigap closes, or can be maximal near $ π/2$, when the dc supercurrent is maximal. We also find that the dissipative response increases at low temperature and can even exceed the normal state conductance. The results are confronted with predictions of the Kubo linear response and time-dependent Usadel equations. This experiment shows the power of the ac susceptibility measurement of individual hybrid mesoscopic systems in probing in a controlled way the quantum dynamics of ABS. By spanning different physical regimes, our experiments provide a unique access to inelastic scattering and spectroscopy of an isolated quantum coherent system. This technique should be a tool of choice to investigate topological superconductivity and detect the topological protection of edge states.
Chow Rings of Fine Quiver Moduli are Tautologically Presented
Creators: name: Franzen, Hans
Publisher: name: arXiv
Year: 2013
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: A result of A. King and C. Walter asserts that the Chow ring of a fine quiver moduli space is generated by the Chern classes of universal bundles if the quiver is acyclic. We will show that defining relations between these Chern classes arise geometrically as degeneracy loci associated to the universal representation.
description: 30 pages, final version to appear in Math. Z
Generalizing Dijkstra's algorithm and Gaussian elimination for solving MDPs
Creators: name: H. Brendan. McMahan
name: Gordon, Geoffrey J.
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: Abstract: "We study the problem of computing the optimal value function for a Markov decision process with positive costs. Computing this function quickly and accurately is a basic step in many schemes for deciding how to act in stochastic environments. There are efficient algorithms which compute value functions for special types of MDPs: for deterministic MDPs with S states and A actions, Dijkstra's algorithm runs in time O(AS log S). And, in single-action MDPs (Markov chains), standard linear-algebraic algorithms find the value function in time O(S┬│), or faster by taking advantage of sparsity or good conditioning. Algorithms for solving general MDPs can take much longer: we are not aware of any speed guarantees better than those for comparably-sized linear programs. We present a family of algorithms which reduce to Dijkstra's algorithm when applied to deterministic MDPs, and to standard techniques for solving linear equations when applied to Markov chains. More importantly, we demonstrate experimentally that these algorithms perform well when applied to Markov chains. More importantly, we demonstrate experimentally that these algorithms perform well when applied to MDPs which 'almost' have the required special structure."
Particle Dark Matter Candidates
Creators: name: Scopel, Stefano
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I give a short overview on some of the favorite particle Cold Dark Matter candidates today, focusing on those having detectable interactions: the axion, the KK-photon in Universal Extra Dimensions, the heavy photon in Little Higgs and the neutralino in Supersymmetry. The neutralino is still the most popular, and today is available in different flavours: SUGRA, nuSUGRA, sub-GUT, Mirage mediation, NMSSM, effective MSSM, scenarios with CP violation. Some of these scenarios are already at the level of present sensitivities for direct DM searches.
description: 7 pages, 4 figures, 3 references added. Contribution to the proceedings of the TAUP 07 conference, Sep. 11-15, Sendai, Japan
MOESM4 of Maternal milk and fecal microbes guide the spatiotemporal development of mucosa-associated microbiota and barrier function in the porcine neonatal gut
Creators: name: Liu, Hongbin
name: Zeng, Xiangfang
name: Zhang, Guolong
name: Hou, Chengli
name: Li, Ning
name: Yu, Haitao
name: Shang, Lijun
name: Zhang, Xiaoya
name: Trevisi, Paolo
name: Yang, Feiyun
name: Liu, Zuohua
name: Qiao, Shiyan
Publisher: name: figshare
Year: 2019
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified

description: Additional file 4: Figure S4. PCoA of phylogenetic community composition based on unweighted UniFrac distance (A), and taxonomic community composition based on Brayâ€“Curtis (B).
Experimental demonstration of shaken lattice interferometry
Creators: name: Weidner, C. A.
name: Anderson, Dana Z.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We experimentally demonstrate a shaken lattice interferometer. Atoms are trapped in the ground Bloch state of a red-detuned optical lattice. Using a closed-loop optimization protocol based on the dCRAB algorithm, we phase-modulate (shake) the lattice to transform the atom momentum state. In this way, we implement an atom beamsplitter and build five interferometers of varying interrogation times $T_I$. The sensitivity of shaken lattice interferometry is shown to scale as $T_I^2$, consistent with simulation [1]. Finally, we show that we can measure the sign of an applied signal and optimize the interferometer in the presence of a bias signal. [1] C. A. Weidner, H. Yu, R. Kosloff, and D. Z. Anderson, Phys. Rev. A 95, 043624 (2017).
description: 5 pages, 6 figures
Localization and Recurrence of Quantum Walk in Periodic Potential on a Line
Creators: name: Chou, C. -I.
name: Ho, C. -L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present numerical study of a model of quantum walk in periodic potential on the line. We take the simple view that different potentials affect differently the way the coin state of the walker is changed. For simplicity and definiteness, we assume the walker's coin state is unaffected at sites without potential, and is rotated in an unbiased way according to Hadamard matrix at sites with potential. This is the simplest and most natural model of a quantum walk in a periodic potential with two coins. Six generic cases of such quantum walks were studied numerically. It is found that of the six cases, four cases display significant localization effect, where the walker is confined in the neighborhood of the origin for sufficiently long times. Associated with such localization effect is the recurrence of the probability of the walker returning to the neighborhood of the origin.
description: 12 pages, 14 figures. References updated, sign typos in Eqs. (2.2) and (2.5) corrected
Intersection Bodies with Certain Symmetries
Creators: name: Dann, Susanna
name: Zymonopoulou, Marisa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: In this paper we study how certain symmetries of convex bodies affect their geometric properties. In particular, we consider the impact of symmetries generated by the block diagonal subgroup of orthogonal transformations, generalizing complex and quaternionic convex bodies. We conduct a systematic study of sections of bodies with symmetries of this type, with the emphasis on problems of the Busemann-Petty type and hyperplane inequalities. The main role belongs to the class of intersection bodies with symmetries.
description: updated version
Generalized Queries and Bayesian Statistical Model Checking in Dynamic Bayesian Networks: Application to Personalized Medicine
Creators: name: Langmead, Christopher J.
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We introduce the concept of generalized probabilistic queries in Dynamic Bayesian Networks (DBN) - computing P(φ 1 |φ 2 ), where φ i is a formula in temporal logic encoding an equivalence class of trajectories through the variables of the model. Generalized queries include as special cases traditional query types for DBNs (i.e., filtering, smoothing, prediction, and classification), but can also be used to express inference problems that are either impossible, or impractical to answer using traditional algorithms for inference in DBNs. We then discuss the relationship between answering generalized queries and the Probabilistic Model Checking Problem and introduce two novel algorithms for efficiently estimating (φ 1 |φ 2 ) in a Bayesian fashion. Finally, we demonstrate our method by answering generalized queries that arise in the context of critical care medicine. Specifically, we show that our approach can be used to make treatment decisions for a cohort of 1,000 simulated sepsis patients, and that it outperforms Support Vector Machines, Neural Networks, and Random Forests on the same task.
Collisional Charging of Individual Sub-Millimeter Particles: Using Ultrasonic Levitation to Initiate and Track Charge Transfer
Creators: name: Lee, Victor
name: James, Nicole M.
name: Waitukaitis, Scott
name: Jaeger, Heinrich M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Electrostatic charging of insulating fine particles can be responsible for numerous phenomena ranging from lightning in volcanic plumes to dust explosions. However, even basic aspects of how fine particles become charged are still unclear. Studying particle charging is challenging because it usually involves the complexities associated with many particle collisions. To address these issues we introduce a method based on acoustic levitation, which makes it possible to initiate sequences of repeated collisions of a single sub-millimeter particle with a flat plate, and to precisely measure the particle charge in-situ after each collision. We show that collisional charge transfer between insulators is dependent on the hydrophobicity of the contacting surfaces. We use glass, which we modify by attaching nonpolar molecules to the particle, the plate, or both. We find that hydrophilic surfaces develop significant positive charges after contacting hydrophobic surfaces. Moreover, we demonstrate that charging between a hydrophilic and a hydrophobic surface is suppressed in an acidic environment and enhanced in a basic one. Application of an electric field during each collision is found to modify the charge transfer, again depending on surface hydrophobicity. We discuss these results within the context of contact charging due to ion transfer and show that they lend strong support to OH- ions as the charge carriers.
description: 24 pages, 6 figures