cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Saturation of the MRI in Strongly Radiation Dominated Accretion Disks
Creators: name: Jiang, Yan-Fei
name: Stone, James M.
name: Davis, Shane W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The saturation level of the magneto-rotational instability (MRI) in a strongly radiation dominated accretion disk is studied using a new Godunov radiation MHD code in the unstratified shearing box approximation. Since vertical gravity is neglected in this work, our focus is on how the MRI saturates in the optically thick mid-plane of the disk. We confirm that turbulence generated by the MRI is very compressible in the radiation dominated regime, as found by previous calculations using the flux-limited diffusion approximation. We also find little difference in the saturation properties in calculations that use a larger horizontal domain (up to four times the vertical scale height in the radial direction). However, in strongly radiation pressure dominated disks (one in which the radiation energy density reaches 1% of the rest mass energy density of the gas), we find Maxwell stress from the MRI turbulence is larger than the value produced when radiation pressure is replaced with the same amount of gas pressure. At the same time, the ratio between Maxwell stress and Reynolds stress is increased by almost a factor of 8 compared with the gas pressure dominated case. We suggest that this effect is caused by radiation drag, which acts like bulk viscosity and changes the effective magnetic Prandtl number of the fluid. Radiation viscosity significantly exceeds both the microscopic plasma viscosity and resistivity, ensuring that radiation dominated systems occupy the high magnetic Prandtl number regime. Nevertheless, we find radiative shear viscosity is negligible compared to the Maxwell and Reynolds stress in the flow. This may have important implications for the structure of radiation dominated accretion disks.
description: 15 pages, 8 figures, 4 tables, accepted by ApJ
Experiences and expectations: Narratives of immigrant early childhood educators and influences on curriculum and pedagogical decision-making
Creators: name: PATEL, SWETA VIJAYKUMAR
Publisher: name: Monash University
Year: 2023
Subjects: classificationCode: 390102
subject: Curriculum and pedagogy theory and development
classificationCode: 390302
subject: Early childhood education
classificationCode: 470210
subject: Globalisation and culture

description: This narrative-based research, underpinned by Appadurai’s concepts of culture, aspiration, and imagination, explored 12 immigrant early childhood (EC) educators’ experiences and the factors influencing their pedagogical decisions in Victoria. The photo-elicitation technique was employed to capture detailed descriptions of their past, present, and future pedagogical and cultural experiences. Each participant was interviewed for 60 minutes, supported by their provision of three visual images. The findings demonstrate that the participants’ journey was complex but led to a transformative learning process. Adjusting to the new educational systems created shifts in participants’ pedagogy, altering their definitions of education and impacting their identity and practices.
Covariant Renormalizable Gravity Theories on (Non) Commutative Tangent Bundles
Creators: name: Vacaru, Sergiu I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The field equations in modified gravity theories possess an important decoupling property with respect to certain classes of nonholonomic frames. This allows us to construct generic off--diagonal solutions depending on all spacetime coordinates via generating and integration functions containing (un--)broken symmetry parameters. Some corresponding analogous models have a nice ultraviolet behavior and seem to be (super) renormalizable in a sense of covariant modifications of Hořava--Lifshits (HL) and ghost free gravity. The apparent noncommutativity and breaking of Lorentz invariance by quantum effects can be encoded into geometric objects and basic equations on noncommutative tangent Lorentz. The constructions can be extended to include conjectured covariant reonormalizable models with effective Einstein fields with (non)commutative variables.
description: latex ws-procs975x65 proceeding style, 3 pages, summary of a talk at MG13 (Stockholm, 2012), QG2, Quantum Gravity Phenomenology
title: Movement and survival rates of Butte Creek spring-run Chinook salmon smolts from the Sutter Bypass to the Golden Gate Bridge in 2015, 2016, and 2017
Creators: name: Cordoleani, Flora
name: Notch, Jeremy
name: McHuron, Alex S.
name: Michel, Cyril J.
name: Ammann, Arnold J.
Publisher: name: Southwest Fisheries Science Center (U.S.)
Year: 2019

description: NOAA technical memorandum NMFS SWFSC ; 618
title: 2018 State of U.S. High Tide Flooding with a 2019 Outlook
Creators: name: Sweet, William
name: Dusek, Greg (Gregory P.)
name: Marcy, Douglas C.
name: Greg (Gregory W.), Carbin
name: Marra, John
Publisher: name: United States. National Ocean Service Center for Operational Oceanographic Products and Services (U.S.)
Year: 2019

description: NOAA technical report NOS CO-OPS ; 090
Potentiale der kombinierten H- und E-Feldmessung für die Bestimmung von Spannungs- und Stromverteilungen in Leiterbahnen
Creators: name: Henke, Anika
name: Nowak, Robert Jan
name: Frei, Stephan
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Störaussendungen
subject: Platine
subject: Leiterbahn
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Die Sicherstellung der elektromagnetischen Verträglichkeit gehört zu den Anforderungen an Elektronikkomponenten. Hierbei muss auch die feldgebundene Störaussendung von Platinen bestimmt werden. Stellt sich dabei heraus, dass ein nicht tolerierbares Maß an Störungen verursacht wird, so ist häufig die genaue Lokalisierung der Störquellen von Interesse. Hierzu sollten primär die Leiterbahnen als abstrahlende Strukturen untersucht werden. Auf Platinen ist die direkte Messung der Ströme und Spannungen aufgrund der schlechten Zugänglichkeit der Messpunkte und der Problematik der Rückwirkungsfreiheit kaum möglich. Nahfeldmessungen oberhalb einer Platine können helfen, die Ströme zu identifizieren. Mit den Messdaten kann die Stromverteilung auf den in ihrer Lage als bekannt angenommenen Leiterbahnen rekonstruiert werden. Für diese Rekonstruktion können verschiedene Feldmodelle verwendet werden. Ein möglicher Ansatz ist die Momentenmethode [1]. Dem gegenüber steht eine Feldmodellierung mit Hilfe von Hertzschen Dipolen [2], [3]. Bisher wurden hauptsächlich Magnetfelddaten für die Rekonstruktion verwendet. In dem vorliegenden Beitrag werden neben den magnetischen Nahfelddaten auch elektrische Feldmessungen zur Rekonstruktion verwendet. Die Verwendung des elektrischen Feldes zur Rekonstruktion der Stromverteilung wurde auch in [4] und [5] untersucht. Dabei modelliert [4] das elektrische und magnetische Feld auf Basis von Dipolen. [5] untersucht lediglich das elektrische Feld und modelliert dieses anhand von Greenschen Funktionen. Der hier vorgestellte neue Ansatz unterscheidet sich in verschiedenen Punkten von [4] und [5]. Zunächst wird wie in [6] zusätzlich die Information über die Lage der Leiterbahnen verwendet und die Leitungstheorie als Randbedingung für die zu rekonstruierenden Stromverteilungen verwendet. Außerdem wird ein anderer Ansatz zur simultanen Betrachtung der elektrischen und magnetischen Felddaten als in [4] verwendet. Es werden einlagige Platinen mit durchgängigen Masseflächen betrachtet, auf denen sich mehrere Leiterbahnen befinden. Modelliert werden diese als Stromfäden über einer ideal leitfähigen und unendlich ausgedehnten Massefläche. Position und Ausbreitungseigenschaften der Leitungen werden als bekannt angenommen. Weitere Platinenkomponenten werden nicht berücksichtigt.
Geometrische Unsicherheitsbetrachtung von rundkoaxialen TEM-Zellen
Creators: name: Pham, Hoang Duc
name: Garbe, Heyno
Publisher: name: Aachen : Apprimus
Year: 2020
Subjects: subject: Störfestigkeit
subject: elektromagentische Felder
subject: TEM-Mode
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik::621,3 | Elektrotechnik, Elektronik

description: Ein wesentliches Arbeitsgebiet in der EMV ist neben der Ermittlung der Störaussendung von elektrischen und elektronischen Geräten auch die Bestimmung der Störfestigkeit gegenüber elektromagnetischen Feldern. Um die Reproduzierbarkeit der EMV-Untersuchungen gewährleisten zu können, sollten die Felder in einem bestimmten Feldtyp vorliegen. Als Feldtyp wird dabei der transversal elektromagnetische Mode (TEM-Mode) gewählt. In der Vergangenheit bestand die Herausforderung darin, den TEM-Mode auf einem Freifeld zu erzeugen. Um Feldtests auch in einer Laborumgebung unter Fernfeldbedingungen gewährleisten zu können, wurde das Feld einer Zweileiteranordnung näher untersucht. In der Arbeit von Schelkunoff [5] wurde gezeigt, dass das Feld bei Leitungsanordnungen mit zweifach berandetem Querschnitt sich zunächst immer im TEM-Mode ausbreitet. Erst bei höheren Frequenzen treten Hohlleitermoden (TM- und TE-Mode) auf. TEM-Zellen haben sich seit Jahren als Mittel zur Darstellung von TEM-Feldern in der EMV-Messtechnik bewährt. Die TEM-Zelle bietet die Möglichkeit, in einer abgeschlossenen Messumgebung die Störfestigkeit oder Störaussendung von elektrischen und elektronischen Mess- oder Prüfkörpern unter Fernfeldbedingungen zu erfassen. Die Frage nach der Messunsicherheit von TEM-Wellenleitern stellt sich in der neueren Zeit wieder, seit mit der Erstellung der Norm zum Thema „Kalibration von Feldsensoren“ (IEC 61000-4-26 – Field Probe Calibration) begonnen wurde. Bei der Nutzung eines Kalibriernormals müssen gemäß GUM [1] auch die Unsicherheiten des Normals angegeben werden. In diesem Beitrag wird der Unsicherheitsbeitrag der Geometrie des TEM-Wellenleiters untersucht. Als mathematischer Ansatz werden die verallgemeinerten Leitungsgleichungen (engl. generalized telegraphist equations, GTEs) verwendet [6]. Die GTEs eignen sich besonders gut für die Untersuchung an TEM-Wellenleitern, da nicht nur das gesamte Feld, sondern auch das Kopplungsverhalten des TEM-Mode zu den höheren Moden beschrieben wird. In vielen Anwendungen ist die tatsächliche Geometrie der Anordnung nicht ideal bzw. nicht genau bekannt. Daher soll die Randkontur des TEM-Wellenleiters gestört werden und der Einfluss auf die Feldverteilung bestimmt werden. Damit der TEM-Wellenleiter für die Kalibrierung von Feldsonden verwendet werden kann, muss zusätzlich das Resonanzverhalten untersucht werden. Die Anregung von höheren Hohlleitermoden führt zu Resonanzeffekten in der TEM-Zelle. An den Resonanzfrequenzen kommt es zu starken Feldstärkeüberhöhungen, welche die TEM-Zelle als Kalibriernormal unbrauchbar machen. Die erste Resonanzfrequenz grenzt somit den nutzbaren Frequenzbereich der TEM-Zelle ein.
Regeneration Supply Chain Model and Pool Stock Dimensioning
Creators: name: Heuer, Tammo
name: Wildmann, Benedict
name: Lucht, Torben
name: Nyhuis, Peter
Publisher: name: Hannover : publish-Ing.
Year: 2020
Subjects: subject: Complex capital good
subject: Regeneration supply chain model
subject: Pool stock dimensioning
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: When regenerating complex capital goods, on-time delivery as the most valuable customers’ requirement is crucial. Schedule reliability and throughput times are being trimmed to meet their targets as precisely as possible while keeping the logistic costs in-check. After disassembly, a significant number of components face relatively long repair times and need to be reassembled on a timed schedule. The configuration of internal supply chains offers the potential to improve schedule reliability. Pooling strategies are developed and discussed to achieve higher flexibility and positive effects on logistical performance. Pools help with reducing throughput times and short-term capacity allocation to satisfy an optimal on-time schedule. Serviceable (SA) components that have already been repaired, are stored in SA-pools and, if necessary, are allocated to the reassembly. The focus of this paper is the non-serviceable pool (nSA-pool), which provides repairable components to the repair stage. The nSA-pool helps to streamline the workflow before components reach several repair shops and has a direct impact on the repair process. Therefore, a model that allows the comprehension of interactions within the internal supply chain was developed and expedient pooling strategies were derived. Furthermore, the related pool stock dimensioning of preceding pools (nSA) before the repair stage and following pools (SA) are put into perspective.
title: Матвей Шульгин. Городской голова Боровичей – депутат Третьей Думы
Creators: name: Ковалев, Борис
Publisher: name: Новгородская областная типография
Year: 2019

description: Матвей Шульгин (1859 – 1933). К началу XX века успел немало потрудиться на благо своего родного города. Окончил уездное училище. Купец 1-й гильдии. В 1894 он стал городским голой города Боровичи. 14 октября 1907 года его избрали в 3-ю Думу от 1-го и 2-го съездов городских избирателей Новгородской губернии. Там он стал членом правоцентристской фракции «Союза 11 октября». В своем личном деле Депутата Думы Шульгин обозначен членом следующих думских комиссий: по Наказу, финансовой, по местному самоуправлению, по городским делам, о торговли и промышленности, о мерах борьбы с пьянством, о мерах по борьбе с пожарами. После революции остался в России. Перед смертью делал в родных Боровичах пуговицы из битых патефонных пластинок и просил новые власти о пайке в 300 граммов хлеба в день.
Temperature-dependent coercive field measured by a quantum dot strain gauge
Creators: name: Chen, Yan
name: Zhang, Yang
name: Keil, Robert
name: Zopf, Michael
name: Ding, Fei
name: Schmidt, Oliver G.
Publisher: name: Washington : American Chemical Society
Year: 2017
Subjects: subject: Coercive field
subject: Low temperature
subject: Piezoelectricity
subject: Quantum dot
subject: Strain gauge
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Coercive fields of piezoelectric materials can be strongly influenced by environmental temperature. We investigate this influence using a hetero-structure consisting of a single crystal piezoelectric film and a quantum dots containing membrane. Applying electric field leads to a physical deformation of the piezoelectric film, thereby inducing strain in the quantum dots and thus modifying their optical properties. The wavelength of the quantum dot emission shows butterfly-like loops, from which the coercive fields are directly derived. The results suggest that coercive fields at cryogenic temperatures are strongly increased, yielding values several tens of times larger than those at room temperature. We adapt a theoretical model to fit the measured data with very high agreement. Our work provides an efficient framework for predicting the properties of ferroelectric materials and advocate their practical applications, especially at low temperatures. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.7b04138
Links arising from braid monodromy factorizations
Creators: name: Amram, Meirav
name: Cohen, Moshe
name: Teicher, Mina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 14B05, 14J17, 57M25

description: We investigate the local contribution of the braid monodromy factorization in the context of the links obtained by the closure of these braids. We consider plane curves which are arrangements of lines and conics as well as some algebraic surfaces, where some of the former occur as local configurations in degenerated and regenerated surfaces in the latter. In particular we focus on degenerations which involve intersection points of multiplicity two and three. We demonstrate when the same links arise even when the local arrangements are different.
description: 24 pages, 32 figures
Interactive effects of altitude, microclimate and shading system on coffee leaf rust
Creators: name: Liebig, Theresa
name: Ribeyre, Fabienne
name: Läderach, Peter
name: Poehling, Hans-Michael
name: Van Asten, Piet
name: Avelino, Jacques
Publisher: name: Abingdon : Taylor and Francis Ltd.
Year: 2019
Subjects: subject: coffee
subject: Hemileia vastatrix
subject: microclimate
subject: piecewise structural equation modelling
subject: shade
subject: Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)

description: Shade effects on coffee diseases are ambiguous because they vary depending on the season and environment. Using Coffee Leaf Rust (CLR) as an example, we demonstrate relationships between the environment and shading systems and their effects on disease intensity. We characterized seasonal variations in microclimate and CLR incidence across different altitudes and shading systems, and integrated effects between the environment, shading systems, microclimate and CLR into a piecewise structural equation model. The diurnal temperature range was higher in unshaded systems, but differences decreased with altitude. Humidity related indicators in shaded systems decreased with altitude. At mid and high altitudes, high CLR incidence occurred in the shading system showing a low diurnal temperature range and a high dew point temperature. Our study demonstrates how microclimatic indicators vary as a function of the season, altitude and the coffee shading system, and how this in turn is related to CLR. © 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Using linked data to annotate and search educational video resources for supporting distance learning
Creators: name: Yu, Hong Qing
name: Pedrinaci, Carlos
name: Dietze, Stefan
name: Domingue, John
Publisher: name: Piscataway, NJ : Institute of Electrical and Electronics Engineers Inc.
Year: 2012
Subjects: subject: Distance learning
subject: e-learning
subject: educational video resources
subject: linked data
subject: semantic annotation
subject: semantic search
subject: Semantic Web
subject: web services
subject: Distance learning environment
subject: Educational resource
subject: Educational videos
subject: Linked datum
subject: On-line tools
subject: Online resources
subject: Open universities
subject: Prototype development
subject: Rapid growth
subject: Semantic annotations
subject: Semantic search
subject: United kingdom
subject: Video annotations
subject: Web information
subject: Curricula
subject: Data handling
subject: Distance education
subject: Metadata
subject: Reusability
subject: Multimedia systems
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: Multimedia educational resources play an important role in education, particularly for distance learning environments. With the rapid growth of the multimedia web, large numbers of educational video resources are increasingly being created by several different organizations. It is crucial to explore, share, reuse, and link these educational resources for better e-learning experiences. Most of the video resources are currently annotated in an isolated way, which means that they lack semantic connections. Thus, providing the facilities for annotating these video resources is highly demanded. These facilities create the semantic connections among video resources and allow their metadata to be understood globally. Adopting Linked Data technology, this paper introduces a video annotation and browser platform with two online tools: Annomation and SugarTube. Annomation enables users to semantically annotate video resources using vocabularies defined in the Linked Data cloud. SugarTube allows users to browse semantically linked educational video resources with enhanced web information from different online resources. In the prototype development, the platform uses existing video resources for the history courses from the Open University (United Kingdom). The result of the initial development demonstrates the benefits of applying Linked Data technology in the aspects of reusability, scalability, and extensibility.
Carex pulicaris L. Cat.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: C.pulicaris L. Cat. 362. l: Vieux-Emosson (Exk. Soc. Murith.). - 3: Val des Dix (J., 0. Meylan).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
On the Possibility of Habitable Moons in the System of HD 23079: Results from Orbital Stability Studies
Creators: name: Cuntz, M.
name: Quarles, B.
name: Eberle, J.
name: Shukayr, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The aim of our study is to investigate the possibility of habitable moons orbiting the giant planet HD 23079b, a Jupiter-mass planet, which follows a low-eccentricity orbit in the outer region of HD 23079's habitable zone. We show that HD 23079b is able to host habitable moons in prograde and retrograde orbits, as expected, noting that the outer stability limit for retrograde orbits is increased by nearly 90% compared to that of prograde orbits, a result consistent with previous generalized studies. For the targeted parameter space it was found that the outer stability limit for habitable moons varies between 0.05236 and 0.06955 AU (prograde orbits) and between 0.1023 and 0.1190 AU (retrograde orbits) depending on the orbital parameters of the Jupiter-type planet if a minimum mass is assumed. These intervals correspond to 0.306 and 0.345 (prograde orbits) and 0.583 and 0.611 (retrograde orbits) of the planet's Hill radius. Larger stability limits are obtained if an increased value for the planetary mass m_p is considered; they are consistent with the theoretically deduced relationship of m_p^{1/3}. Finally, we compare our results to the statistical formulae of Domingos et al. (2006) [MNRAS 373, 1227], indicating both concurrence and limitations.
description: 15 pages, 8 figures, 6 tables; Publ. Astron. Soc. Australia (PASA); in press. arXiv admin note: text overlap with arXiv:1104.3092
Simple-ML: Towards a Framework for Semantic Data Analytics Workflows
Creators: name: Gottschalk, Simon
name: Tempelmeier, Nicolas
name: Kniesel, Günter
name: Iosifidis, Vasileios
name: Fetahu, Besnik
name: Demidova, Elena
Publisher: name: Heidelberg : Springer Verlag
Year: 2019
Subjects: subject: Reusability
subject: Semantics
subject: Framework development
subject: Real-world
subject: Semantic data model
subject: Semantic technologies
subject: Work-flows
subject: Data Analytics
subject: Konferenzschrift
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: In this paper we present the Simple-ML framework that we develop to support efficient configuration, robustness and reusability of data analytics workflows through the adoption of semantic technologies. We present semantic data models that lay the foundation for the framework development and discuss the data analytics workflows based on these models. Furthermore, we present an example instantiation of the Simple-ML data models for a real-world use case in the mobility domain. © 2019, The Author(s).
roboterfabrik : A Pilot to Link and Unify German Robotics Education to Match Industrial and Societal Demands
Creators: name: Haddadin, Sami
name: Johannsmeier, Lars
name: Schmid, Johannes
name: Ende, Tobias
name: Parusel, Sven
name: Haddadin, Simon
name: Schappler, Moritz
name: Lilge, Torsten
name: Becker, Marvin
Publisher: name: Cham : Springer
Year: 2018
Subjects: subject: Robotic Nature
subject: Robot Technology
subject: Human-robot Collaboration
subject: Dual Education System
subject: PANDA System
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In this paper we introduce a novel robotics education concept entitled roboterfabrik. This approach is already implemented as a pilot project in the German educational system. Overall, we promote establishing the first generation of robotic natives. For this we need to provide both practical and theoretical experience in robotics to young people and give them access to state-of-the art, high performance yet affordable industrial robotic technology. Specifically, our approach systematically connects different existing school types, universities as well as companies. It comprises specialized lectures at the university, certified workshops and Robothons which are derived from the hackathon concept, and modified to the demand of roboticists.
Electron-atom scattering in a circularly polarized laser field
Creators: name: Cionga, Aurelia
name: Ehlotzky, Fritz
name: Zloh, Gabriela
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We consider electron-atom scattering in a circularly polarized laser field at sufficiently high electron energies, permitting to describe the scattering process by the first order Born approximation. Assuming the radiation field has sufficiently moderate intensities, the laser-dressing of the hydrogen target atom in its ground state will be treated in second order perturbation theory. Within this approximation scheme, it is shown that the nonlinear differential cross sections of free-free transitions do neither depend on the {\it dynamical phase} $ϕ$ of the radiative process nor on the {\it helicity} of the circularly polarized laser light. Relations to the corresponding results for linear laser polarization are established.
Multi-Provider Virtual Network Embedding With Limited Information Disclosure
Creators: name: Dietrich, David
name: Rizk, Amr
name: Papadimitriou, Panagiotis
Publisher: name: Piscataway, NJ : Institute of Electrical and Electronics Engineers Inc.
Year: 2015
Subjects: subject: Network virtualization
subject: Virtual network embedding
subject: Topology abstraction
subject: Virtualized infrastructures
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The ever-increasing need to diversify the Internet has recently revived the interest in network virtualization. Wide-area virtual network (VN) deployment raises the need for VN embedding (VNE) across multiple Infrastructure Providers (InPs), due to the InP's limited geographic footprint. Multi-provider VNE, in turn, requires a layer of indirection, interposed between the Service Providers and the InPs. Such brokers, usually known as VN Providers, are expected to have very limited knowledge of the physical infrastructure, since InPs will not be willing to disclose detailed information about their network topology and resource availability to third parties. Such information disclosure policies entail significant implications on resource discovery and allocation. In this paper, we study the challenging problem of multi-provider VNE with limited information disclosure (LID). In this context, we initially investigate the visibility of VN Providers on substrate network resources and question the suitability of topology-based requests for VNE. Subsequently, we present linear programming formulations for: (i) the partitioning of traffic matrix based VN requests into segments mappable to InPs, and (ii) the mapping of VN segments into substrate network topologies. VN request partitioning is carried out under LID, i.e., VN Providers access only information which is not deemed confidential by InPs. We further investigate the suboptimality of LID on VNE against a best-case scenario where the complete network topology and resource availability information is available to VN Providers. © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Multi-cluster complexes
Creators: name: Ceballos, Cesar
name: Labbé, Jean-Philippe
name: Stump, Christian
Publisher: name: Nancy : French Association for Discrete Mathematics & Theoretical Computer Science
Year: 2012
Subjects: subject: Cluster complexes
subject: Coxeter-Catalan combinatorics
subject: Generalized associahedra
subject: Multi-triangulations
subject: Sorting words
subject: Subword complexes
subject: Combinatorics
subject: Sub words
subject: Computer science
subject: Combinatorial mathematics
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We present a family of simplicial complexes called multi-cluster complexes. These complexes generalize the concept of cluster complexes, and extend the notion of multi-associahedra of types A and B to general finite Coxeter groups. We study combinatorial and geometric properties of these objects and, in particular, provide a simple combinatorial description of the compatibility relation among the set of almost positive roots in the cluster complex.
Right about time?
Creators: name: Gryb, Sean
name: Mercati, Flavio
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Have our fundamental theories got time right? Does size really matter? Or is physics all in the eyes of the beholder? In this essay, we question the origin of time and scale by reevaluating the nature of measurement. We then argue for a radical scenario, supported by a suggestive calculation, where the flow of time is inseparable from the measurement process. Our scenario breaks the bond of time and space and builds a new one: the marriage of time and scale.
description: 12 pages, 2 figures. Only author affiliations and emails added. This essay received fourth prize in the juried FQXi essay competition of 2012
Elucidating the effect of mass transport resistances on hydrogen crossover and cell performance in PEM water electrolyzers by varying the cathode ionomer content
Creators: name: Trinke, P.
name: Keeley, G.P.
name: Carmo, M.
name: Bensmann, B.
name: Hanke-Rauschenbach, R.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2019
Subjects: subject: Cathodes
subject: Electrolytic cells
subject: Hydrogen
subject: Ionomers
subject: Mass transfer
subject: Polyelectrolytes
subject: Proton exchange membrane fuel cells (PEMFC)
subject: Concentration gradients
subject: Dissolved hydrogen concentrations
subject: Electrode architecture
subject: Half-cell potential
subject: Mass transfer resistances
subject: Mass-transport resistance
subject: Polymer electrolyte membranes
subject: Supersaturated concentration
subject: Gas permeable membranes
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: An important challenge for polymer electrolyte membrane (PEM) water electrolysis is to reduce the permeation of the produced gases. This crossover affects the cell efficiency and causes safety issues. The crossover increases with current density, most probably due to mass transfer resistances. This work aims to investigate the influence of the cathode ionomer content on hydrogen crossover. Therefore, the ionomer content was varied between 10 and 40 wt% to clearly influence the mass transfer resistances. The best performance and lowest crossover was obtained for 10 wt% ionomer. However, within the observed ionomer range the mass transfer resistances increase with ionomer content that cause increases in hydrogen crossover and cell voltage. Both can be entirely explained by the same quantity of supersaturated dissolved hydrogen concentrations. These supersaturated concentrations cause higher cathode half-cell potentials, which explain the cell voltage increase and lead to higher concentration gradients across the membrane, which enhance the crossover. These findings highlight the importance of mass transfer resistances within catalyst layers in terms of crossover and performance. They constitute an important step in the clarification of the complex interplay between mass transport and voltage losses, enabling the development of novel electrode architectures for PEM water electrolyzers. © The Author(s) 2019.
Nematic State of the Pnictides Stabilized by the Interplay Between Spin, Orbital, and Lattice Degrees of Freedom
Creators: name: Liang, Shuhua
name: Moreo, Adriana
name: Dagotto, Elbio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The nematic state of the iron-based superconductors is studied in the undoped limit of the three-orbital ($xz$, $yz$, $xy$) spin-fermion model via the introduction of lattice degrees of freedom. Monte Carlo simulations show that in order to stabilize the experimentally observed lattice distortion and nematic order, and to reproduce photoemission experiments, {\it both} the spin-lattice and orbital-lattice couplings are needed. The interplay between their respective coupling strengths regulates the separation between the structural and Néel transition temperatures. Experimental results for the temperature dependence of the resistivity anisotropy and the angle-resolved photoemission (ARPES) orbital spectral weight are reproduced by the present numerical simulations.
Climate Change Leads to Relative Decrease in Coarse Woody Debris Volume in West Coast US Forests
Creators: name: Cambron, Trevor
name: Field, Chris
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: subject: climate change
subject: forests
subject: Coarse woody debris
subject: Machine learning
subject: model
subject: Forest Inventory and Analysis Program (U.S.)

description: The impact of climate change on dead wood volumes in US forests remains uncertain. Coarse woody debris, or pieces of dead wood at least 3 inches in diameter, play an especially important role in habitat quality, wildfire risk, and carbon storage. This study leverages machine learning techniques and data from the US Forest Service’s Forest Inventory and Analysis Program to predict coarse woody debris volumes in California, Oregon, and Washington under different climate change scenarios. Our results suggest that though coarse woody debris volumes are predicted to increase due to increasing stand age, climate change has a relatively negative impact on CWD volume. We posit that this could be driven by increased decomposition. This study represents the first machine learning approach to predicting the volume of coarse woody debris under climate change and adds to a small but growing body of evidence that climate change will have a negative impact on CWD volume.
NAUTILOS D5.8 - Data sheet of final animal towed tagging system with O2 sensor
Creators: name: Hélder Covas Oliveira
name: Bartolomeu, Tiago
name: Macedo, Tiago
name: Rijo, Carlos
name: Magalhães, Raquel
Publisher: name: Zenodo
Year: 2022
Subjects: www.nautilos-h2020.eu

description: Data sheet of final animal towed tagging system with O2 sensor Document describing the animal towed tagging system with incorporated dissolved oxygen sensor for use in NAUTILOS project
Disassembly sequencing in the regeneration of complex capital goods
Creators: name: Lucht, Torben
name: Heuer, Tammo
name: Nyhuis, Peter
Publisher: name: Hannover : publish-Ing.
Year: 2020
Subjects: subject: Disassembly
subject: MRO
subject: Regeneration
subject: Complex capital goods
subject: Condition monitoring
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Despite constantly increasing condition monitoring parallel to operation, maintenance, repair & overhaul (MRO) processes in the regeneration of complex capital goods are still characterised by a high degree of uncertainty regarding the capacity and material demands to be expected from a regeneration order. In order to meet the committed delivery times and dates, the disassembly at the beginning of the regeneration supply chain is of particular importance for the performance of the entire downstream regeneration process. High potential for improving logistical performance lies in an intelligent and logistics-oriented sequencing strategy in disassembly. In addition to technical-physical boundary conditions, the interaction of the disassembly process with downstream process steps and additional other control measures must also be taken into account. The logistical description and evaluation of the sequencing-oriented measures for improving the logistical performance of disassembly in the context of the regeneration of complex capital goods makes their modelling a necessary prerequisite and basis. This paper presents a basic logistical design and modelling approach.
Synaptic Scaling Balances Learning in a Spiking Model of Neocortex
Creators: name: Rowan, Mark
name: Neymotin, Samuel
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Learning in the brain requires complementary mechanisms: potentiation and activity-dependent homeostatic scaling. We introduce synaptic scaling to a biologically-realistic spiking model of neocortex which can learn changes in oscillatory rhythms using STDP, and show that scaling is necessary to balance both positive and negative changes in input from potentiation and atrophy. We discuss some of the issues that arise when considering synaptic scaling in such a model, and show that scaling regulates activity whilst allowing learning to remain unaltered.
description: 10 pages
Tecnologías de IA contra la desinformación
Creators: name: Javier Cantón
Publisher: name: Zenodo
Year: 2022
Subjects: disinformation
artificial intelligence

description: La desinformación encuentra espacios de desarrollo a través de noticias y eventos que irrumpen en las agendas mediáticas mundiales. Lo hemos visto con la pandemia de la COVID-19, pero más recientemente con la guerra en Ucrania. Las herramientas tecnológicas juegan un papel fundamental en la creación y viralización de contenidos falsos, ya sea en las adaptaciones locales de dichos contenidos o en su difusión masiva mediante cuentas falsas y bots. Asimismo, posibilitan la creciente penetración de la desinformación en cada vez más dispositivos y plataformas de comunicación con el objetivo de abarcar el máximo de grupos demográficos posibles. En una carrera tecnológica, las agencias que crean contenidos falsos están utilizando tecnologías avanzadas de inteligencia artificial (IA) para elaborar mensajes de desinformación con el fin de aumentar su propagación y su credibilidad, incluida la fabricación de “deepfakes”. El número de tecnologías en el contexto de Big Data y Machine/Deep Learningcon potencial para apoyar a los verificadores de hechos y a los profesionales de los medios de comunicación es cada vez mayor, pero no es suficiente. Todavía hay una falta de conocimiento adecuado de sus capacidades y de cómo se pueden explotar para apoyar, mejorar y acelerar el proceso de verificación, ya sea por parte de losverificadores de hechos o de la propia ciudadanía. El proyecto IBERIFIER es un consorcio multidisciplinar de 23 entidades que ha generado una red sin precedentes de académicos, informáticos, verificadores de hechos, agencias de noticias e instituciones de investigación, en España y Portugal. Entre sus objetivos para ayudar en la lucha contra la desinformación está la revisión de las herramientas computacionales y sus aplicaciones como soporte para la detección de desinformación, así como el desarrollo de sistemas para dicha detección basados en IA. En esta comunicación se expondrán algunos de los logros del proyecto IBERIFIER hasta el momento, así como algunas de las líneas prospectivas que se encuentran actualmente en desarrollo.
Naïve and informed views on the nature of scientific inquiry in large-scale assessments: Two sides of the same coin or different currencies
Creators: name: Nehring, Andreas
Publisher: name: Chichester : John Wiley and Sons Ltd
Year: 2019
Subjects: subject: large-scale assessment
subject: latent class analysis
subject: nature of scientific inquiry
subject: questionnaire
subject: views in science education
subject: Surveys
subject: Latent class analysis
subject: Science education
subject: Scientific inquiry
subject: Education computing
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Many models in the field of epistemic cognition conceptualize students' views as being on a continuum between the poles of naïve and informed views. Against this background, the aim of the present study was to find out whether views on the nature of scientific inquiry (NOSI views) should be conceptualized and quantitatively assessed in a more multiplistic manner, considering naïve and informed views in their own, separate dimensions. Based on a competence model defining three inquiry methods, we developed a Likert-scaled questionnaire containing 10 scales, each assessing one NOSI view. We administered the questionnaire to a sample of 802 students in the lower and upper levels of secondary school. Based on structural equation modeling, the analyses confirmed a 10-dimensional model, distinguishing between each naïve and informed views as the only adequate representation of the data. Latent class analysis and interview data revealed four profiles of NOSI views in the data, which differed with regard to their agreement or disagreement with different naïve and informed views. We interpret these findings as evidence that supports more multiplistic models, with relevance to conceptualizing, measuring, and fostering NOSI views. We derive future directions of nature of science and NOSI research linking basic and applied research using experimental studies. © 2019 The Author. Journal of Research in Science Teaching published by Wiley Periodicals, Inc.
Development of durable 3-electrode lithium-ion pouch cells with LTO reference mesh: Aging and performance studies
Creators: name: Epding, B.
name: Broda, A.
name: Rumberg, B.
name: Jahnke, H.
name: Kwade, A.
Publisher: name: Bristol : IOP Publishing Ltd.
Year: 2019
Subjects: subject: Aluminum coatings
subject: Anodes
subject: Charging time
subject: Electrochemical impedance spectroscopy
subject: Lithium-ion batteries
subject: Mesh generation
subject: Testing
subject: Titanium oxides
subject: C-rate performance
subject: Cell performance
subject: Charge current
subject: Constant current
subject: Lithium titanium oxide
subject: Lithium-ion cells
subject: Performance study
subject: Reference electrodes
subject: Lithium compounds
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::600 | Technik::660 | Technische Chemie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Building a lithium-ion cell with a third reference electrode which is stable and does not disturb the cell characteristics promises deep insights into the cell performance and aging behavior. In this study, a lithium titanium oxide coated aluminum mesh is introduced into lab size 28 mAh pouch cells, which allows the cells to be braced as usual. The influence of inserting the coated mesh together with an additional separator is analyzed using electrochemical impedance spectroscopy and cyclic aging tests. Cells with this reference electrode show small deviations in the Nyquist plot and an increased capacity fade compared to the standard cells. Nonetheless, these 3-electrode cells already allowed C-rate performance tests in a fresh and aged cell state. According to this, the charge current profiles for fresh and aged cells are optimized as step wise protocols to improve the utilization of the anode overpotential reserve while avoiding lithium plating. In order to realize this, the aged cells require a 60% slower protocol. This work shows that the overpotentials on the anode side increase during aging, which makes the cells more susceptible to lithium plating. However, compared to a constant current charge, a reduction in charging time of 30% is possible. © 2019 The Electrochemical Society.
The Mazur-Ulam theorem
Creators: name: Nica, Bogdan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 46B04, 46B20

description: A short proof of the Mazur-Ulam theorem concerning isometries of real normed spaces.
Mechanical feasibility and decentralized control algorithms of small-scale, multi-directional transport modules
Creators: name: Krühn, Tobias
name: Sohrt, Simon
name: Overmeyer, Ludger
Publisher: name: Heidelberg : Springer Verlag
Year: 2016
Subjects: subject: Deadlock prevention
subject: Decentralized control
subject: Distributed control
subject: Intralogistics
subject: Material handling
subject: Multiagent systems
subject: Warehousing
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: In this paper, we describe a conveyor matrix consisting of small-scale, multi-directional transport modules that are considerably smaller than the transported packets. If a large number of these modules are combined into a matrix, the emerging network solves transport tasks through cooperation of the modules. The control of the system is decentralized: Each module has its own control and derives its actions only from its own sensor and received messages from neighboring modules. Both the mechanical feasibility of the modules and the control algorithms are presented. We show that collision-free routes can be planned by the decentralized controlled system. Lastly, we present the necessary algorithms to detect and prevent deadlocks.
Building the Next Generation of Cyberinfrastructure Professionals
Creators: name: Murillo, Angela
name: Brower, Don
name: Hossain, Sarowar
name: Kee, Kerk
name: Mandal, Anirban
name: Nabrzyski, Jarek
name: Scott, Erik
name: Virdone, Nicole
name: Deelman, Ewa
Publisher: name: Zenodo
Year: 2023
Subjects: cyberinfrastructure
training
workforce development
major facilities

description: The CI Compass Fellowship Program (CICF) was developed to broaden undergraduate student participation in cyberinfrastructure (CI) research, development, and operations. CICF is a distinctive program for students pursuing studies in computer science, information science, data science, and other related fields. During year 1, CICF had six students from two institutions. During year 2, CICF had fourteen students from nine institutions. This poster details CICF development and summarizes its impact.
description: This project was conducted as part of the CI Compass Student Fellowship Program supported by the National Science Foundation award Grant #2127548. To learn more about CI Compass, visit: https://ci-compass.org/