cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Experimental and numerical study of the effect of surface patterning on the frictional properties of polymer surfaces
Creators: name: Balestra, Simone
name: Costagliola, Gianluca
name: Pegoraro, Amedeo
name: Picollo, Federico
name: Molinari, Jean-François
name: Pugno, Nicola M.
name: Vittone, Ettore
name: Bosia, Federico
name: Sin, Agusti
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We describe benchmark experiments to evaluate the frictional properties of laser patterned low-density polyethylene as a function of sliding velocity, normal force and humidity. The pattern is a square lattice of square cavities with sub-mm spacing. We find that dynamic friction decreases compared to non-patterned surfaces, since stress concentrations lead to anticipated detachment, and that stick-slip behavior is also affected. Friction increases with humidity, and the onset of stick-slip events occurs in the high humidity regime. Experimental results are compared with numerical simulations of a simplified 2-D spring-block model. A good qualitative agreement can be obtained by introducing a deviation from the linear behavior of the Amontons-Coulomb law with the load, due to a saturation in the effective contact area with pressure. This also leads also to the improvement of the quantitative results of the spring-block model by reducing the discrepancy with the experimental results, indicating the robustness of the adopted simplified approach, which could be adopted to design patterned surfaces with controlled friction properties.
Multi-way blockmodels for analyzing coordinated high-dimensional responses
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2013
Subjects: High dimensional data
variational inference
molecular biology
yeast

description: We consider the problem of quantifying temporal coordination between multiple high-dimensional responses. We introduce a family of multi-way stochastic blockmodels suited for this problem, which avoids preprocessing steps such as binning and thresholding commonly adopted for this type of data, in biology. We develop two inference procedures based on collapsed Gibbs sampling and variational methods.We provide a thorough evaluation of the proposed methods on simulated data, in terms of membership and blockmodel estimation, predictions out-of-sample and run-time. We also quantify the effects of censoring procedures such as binning and thresholding on the estimation tasks. We use these models to carry out an empirical analysis of the functional mechanisms driving the coordination between gene expression and metabolite concentrations during carbon and nitrogen starvation, in S. cerevisiae. © Institute of Mathematical Statistics, 2013.
พันธุศาสตร์เซลล์ของปลากาดา (Morulius chrysophekadion) และปลาดุมชี (Nandus oxyrhynchus) (Cytogenetics  of Black Shark (Morulius  Chrysophekadion)  and Black Tiger Fish
(Nandus oxyrhynchus))
Creators: name: จีราภรณ์ มิ่งขวัญ
Publisher: name: Genetics Society of Thailand
Year: 2013
Subjects: cytogenetics, chromosome, Morulius chrysophekadion, Nandus oxyrhynchus

description: S1 (Special Issue 1), S.1, Thai Journal of Genetics
Teaching Programming for Mathematical Scientists
Creators: name: Betteridge, Jack
name: Chan, Eunice Y. S.
name: Corless, Robert M.
name: Davenport, James H.
name: Grant, James
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 97D40, 97P80

description: Over the past thirty years or so the authors have been teaching various programming for mathematics courses at our respective Universities, as well as incorporating computer algebra and numerical computation into traditional mathematics courses. These activities are, in some important ways, natural precursors to the use of Artificial Intelligence in Mathematics Education. This paper reflects on some of our course designs and experiences and is therefore a mix of theory and practice. Underlying both is a clear recognition of the value of computer programming for mathematics education. We use this theory and practice to suggest good techniques for and to raise questions about the use of AI in Mathematics Education.
description: 21 pages, 3 figures
title: Factors Influencing Population Growth of Tribolium brevicornis in the Laboratory
Creators: name: Gulla, Amin
Publisher: name: Utah State University
Year: 1967

description: To determine the effect of the factors of the environment (temperature, relative humidity, and food) on the population growth of Tribolium brevicornis, different levels of temperatures from 17.5°C - 37.5°C were used. Effect of these IeveIs of temperatures was tested upon both pre-embryonic and post-embryonic development. No hatching occurred at 17.5°C, but the threshold temperature (the minimum temperature for the development) was just before 17.5°C. The optimum temperature for the embryonic development was found to be between 32.5°C - 35°C.
With the use of the saturated salt solution according to Buxton (1931) and Buxton and Melanby (1934), certain humidity levels (15, 45, 77.5 and 93 percent relative humidity) were used. These levels of humidities did not seem to have a significant effect on the embryonic development
The duration of the larval and the pupal stage was determined under three levels of temperature (21.9 ± 1, 27.11 ± 1.2 and 30°C). The shortest duration of larval and pupal stage was found to be under 30°C. The levels of the humidities tested (15, 45, 77.5 and 93 percent relative humidity) upon the duration of larval and pupal stage did not seem to have a significant effect.
Effect of the population densities of the beetles on the cannibalism and the oviposition was tested. The total cannibalism and total oviposition were highly significantly different. The change in rates of oviposition and cannibalism under the densities used (2, 4, 8, 16, 32 and 64 beetles) were not significant, but because of the high standard deviations and coefficient of variabilities the hypothesis (the rate of cannibalism increases with increasing densities, and the rate of oviposition decreases with decreasing densities) were not rejected.
The Guidelines for Producing the ATRIUM Curriculum
Creators: name: Tasovac, Toma
name: Garnett, Vicky
Publisher: name: Zenodo
Year: 2024
Subjects: Training
Education

description: These Guidelines for Producing the ATRIUM Curriculum provide a comprehensive set of recommendations and best practices for the creation, development, and presentation of training resources within the ATRIUM project. The overall goal of these Guidelines is to ensure that all training materials adhere to the highest standards of quality, accessibility, consistency and usability. At the same time, the Guidelines also align with the broader goals of the ATRIUM initiative to provide vastly improved access to a rich portfolio of state-of-the-art services available to researchers across countries, languages, domains and media.

Specifically, these Guidelines have three sets of goals:

1. Establish the general principles of Open Science and FAIR data (Findable, Accessible, Interoperable, Reusable) in the context of Open Educational Resources (OER) as the overall framework for developing and disseminating the ATRIUM Curriculum;2. Foreground the guiding pedagogical principles underlying the ATRIUM Curriculum to be published on DARIAH-Campus; and3. Provide a detailed style guide for structuring and formatting ATRIUM training materials in order to ensure consistency across the curriculum, which will be produced by different project partners.
Dirac Equation Studies in the Tunnelling Energy Zone
Creators: name: De Leo, Stefano
name: Rotelli, Pietro
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the tunnelling zone V0 < E < V0+m for a one-dimensional potential within the Dirac equation. We find the appearance of superluminal transit times akin to the Hartman effect.
description: 12 pages, 4 figures
Transport and Magnetic Properties of FexVse2 (x = 0 - 0.33)
Creators: name: Yadav, C. S.
name: Rastogi, A. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present our results of the effect of Fe intercalation on the structural, transport and magnetic properties of 1T-VSe2. Intercalation of iron, suppresses the 110K charge density wave (CDW) transition of the 1T-VSe2. For the higher concentration of iron, formation of a new kind of first order transition at 160K takes place, which go on stronger for the 33% Fe intercalation. Thermopower of the FexVSe2 compounds (x = 0 - 0.33), however do not show any anomaly around the transition. The intercalation of Fe does not trigger any magnetism in the weak paramagnetic 1T-VSe2, and Fe is the low spin state of Fe3+.
description: 7 pages, 8 figures, 2 tables
Versatile van der Waals density functional based on a meta-generalized gradient approximation
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: cond-mat.mtrl-sci
cond-mat.soft
physics.atm-clus
physics.comp-ph

description: A "best-of-both-worlds" van der Waals (vdW) density functional is constructed, seamlessly supplementing the strongly constrained and appropriately normed (SCAN) meta-generalized gradient approximation for short- and intermediate-range interactions with the long-range vdW interaction from rVV10, the revised Vydrov-van Voorhis nonlocal correlation functional. The resultant SCAN+rVV10 is the only vdW density functional to date that yields excellent interlayer binding energies and spacings, as well as intralayer lattice constants in 28 layered materials. Its versatility for various kinds of bonding is further demonstrated by its good performance for 22 interactions between molecules; the cohesive energies and lattice constants of 50 solids; the adsorption energy and distance of a benzene molecule on coinage-metal surfaces; the binding energy curves for graphene on Cu(111), Ni(111), and Co(0001) surfaces; and the rare-gas solids. We argue that a good semilocal approximation should (as SCAN does) capture the intermediate-range vdW through its exchange term. We have found an effective range of the vdW interaction between 8 and 16 Å for systems considered here, suggesting that this interaction is negligibly small at the larger distances where it reaches its asymptotic power-law decay.
title: Ribose 5'-Phosphate Aminotransferase of Salmonella typhimurium
Creators: name: Vahora, Gulamnabi Y.
Publisher: name: Utah State University
Year: 1971

description: Ribose-5 '-phosphate aminotransferase, an alternate first enzyme in the purine de novo pathway, has been purified about 800-fold from Salmonella typhimurium (pur D-55 ). The enzyme is distinct from ribosylpyrophosphate5' -phosphate amidotransferase (E C 2.4.2.14), has an approximate molecular weight of 229,000, and requires ribose-5'-phosphate, ATP and either ammonium ion, carbamyl phosphate or L-glutamine, to synthesize 5'-phosphoribosylamine (PRA). A coupled assay system, employing a S. typhimurium (pur G-310) extract as the coupling-agent source, was used to measure the enzyme. PRA production in this system was inhibited by higher ribose-5' -phosphate concentrations and longer (over 10 minutes) incubation periods. It is proposed that an alternate pathway for the initial step of purine biosynthesis exists in S. typhimurium, namely, the direct conversion of ribose-5 '-phosphate and ammonium ion to PRA.
Transport and Magnetic properties of Fe1/3VSe2
Creators: name: Yadav, C. S.
name: Rastogi, A. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electrical conductivity, thermopower and magnetic properties of Fe-intercalated Fe0.33VSe2 has been reported between 4.2K - 300K. We observe a first order transition in the resistivity of the sintered pellets around 160K on cooling. The electronic properties including the transitional hysteresis in the resistance anomaly (from 80K-160K) are found to be very sensitive to the structural details of the samples, which were prepared in different annealing conditions. The thermopower results on the sintered pellets are reported between 10K - 300K. The magnetic measurements between 2K - 300K and up to 14 Tesla field show the absence of any magnetic ordering in Fe0.33VSe2. The magnetic moment per Fe -atom at room temperature (between 1.4 to 1.7 Bohr Magneton) is much lower than in previously reported anti-ferromagnetic FeV2Se4. Furthermore, the Curie constant shows a rapid and continuous reduction and combined with the high field magnetization result at 2K suggests a rapid decrease in the paramagnetic moments on cooling to low temperatures and the absence of any magnetic order in Fe0.33VSe2 at low temperatures.
description: 8 pages,5 figures
Thermoelectric power as a probe of density of states in correlated actinide materials: The case of PuCoGa5 superconductor
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: cond-mat.str-el

description: ©2016 American Physical Society. We present measurements of the thermoelectric power of the plutonium-based unconventional superconductor PuCoGa5. The data is interpreted within a phenomenological model for the quasiparticle density of states of intermediate valence systems, and the results are compared with results obtained from photoemission spectroscopy. The results are consistent with the intermediate valence nature of 5f electrons; furthermore, we propose that measurements of the Seebeck coefficient can be used as a probe of density of states in this material, thereby providing a link between transport measurements and photoemission in strongly correlated materials. We discuss these results and their implications for the electronic structure determination of other strongly correlated systems, especially actinide materials.
On the Moral Justification of Statistical Parity
Creators: name: Hertweck, Corinna
name: Heitz, Christoph
name: Loi, Michele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: A crucial but often neglected aspect of algorithmic fairness is the question of how we justify enforcing a certain fairness metric from a moral perspective. When fairness metrics are proposed, they are typically argued for by highlighting their mathematical properties. Rarely are the moral assumptions beneath the metric explained. Our aim in this paper is to consider the moral aspects associated with the statistical fairness criterion of independence (statistical parity). To this end, we consider previous work, which discusses the two worldviews "What You See Is What You Get" (WYSIWYG) and "We're All Equal" (WAE) and by doing so provides some guidance for clarifying the possible assumptions in the design of algorithms. We present an extension of this work, which centers on morality. The most natural moral extension is that independence needs to be fulfilled if and only if differences in predictive features (e.g. high school grades and standardized test scores are predictive of performance at university) between socio-demographic groups are caused by unjust social disparities or measurement errors. Through two counterexamples, we demonstrate that this extension is not universally true. This means that the question of whether independence should be used or not cannot be satisfactorily answered by only considering the justness of differences in the predictive features.
description: 11 pages, accepted to ACM FAccT 2021
Individual Scent-Marks of Nest Entrances in the Solitary Bee, Osmia cornuta (Hymenoptera: Apoidea)
Creators: name: Frahnert, Konrad Sebastian
name: Seidelmann, Karsten
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: nest recognition
subject: Dufour’s gland
subject: cuticular hydrocarbons
subject: scent mark
subject: 590

description: The ability to recognize the own nest is a basic skill in nest constructing solitary bees. Osmia cornuta females use a dual mechanism of visual orientation to approach a nest and olfactory verification of the tube when entering it. Occupied tubular cavities were steadily marked by the resident female. Nest marking substances originate from Dufour’s gland and cuticle, enriched by external volatiles. Scent tags were dominated by alkanes and alkenes in a species-specific mixture enriched by small amounts of fatty acid esters, alcohols, and aldehydes. The individual nest tags are sufficiently variable but do not match perfectly with the nesting female. Furthermore, tags are not consistent over time, although females continue in marking. Besides the correct position of the entrance in space, bees have to learn also the bouquet of the used cavity and update their internal template at each visit to recognize their own nest by its actual smell. Due to the dominance of the species-specific hydrocarbon pattern, nest marks may function not only as an occupied sign but may also provide information on the species affiliation and constitution of the nest owner.
title: Photovoltaic Circularity: Solar Panel Recycling and End-of-Life Considerations
Creators: name: Gracia, Fernando
name: Sardana, Rishab
Publisher: name: United States International Trade Commission
publisherIdentifier: https://ror.org/05hsggr76
publisherIdentifierScheme: ROR
Year: 2024

description: Recycling is one of the primary methods used to keep end-of-life solar panels out of landfills and recirculate various raw materials. However, regulatory and technical challenges, such as a lack of global
coordination and limitations in the Harmonized System, have hindered international trade in the
industry. This EBOT explores the global state of solar panel recycling and end-of-life opportunities for
these products, with a focus on U.S. capabilities and policies that incentivize recycling.
R-matrix propagation with adiabatic bases for the photoionization spectra of atoms in magnetic fields
Creators: name: Mota-Furtado, F.
name: O'Mahony, P. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The photoionization spectrum of an atom in a magnetic field is calculated by combining R-matrix propagation with local adiabatic basis expansions. This approach considerably increases the speed and the energy range over which calculations can be performed compared to previous methods, allowing one to obtain accurate partial and total cross sections over an extended energy range for an arbitrary magnetic field strength. In addition, the cross sections for all atoms of interest can be calculated simultaneously in a single calculation. Multichannel quantum defect theory allows for a detailed analysis of the resonance structure in the continuum. Calculated cross sections for a range of atoms in both laboratory and astrophysical field strengths are presented.
description: 16 pages, 7 figures, Revtex
Supporting resilience with industrial 5G systems and Industrie 4.0
Creators: name: Cainelli, Gustavo
name: Rauchhaupt, Lutz
name: Underberg, Lisa
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 5G systems
subject: Industrie 4.0
subject: Resilient system
subject: 621.3

description: In industry 4.0, production systems must be able to adapt to produce products with customer requirements. However, not only this kind of flexibility is needed. The system must also be able to adapt itself to keep working if unforeseen events occur. A system capable of this is called a resilient system. Resilience is the ability not to fail completely if a subsystem fails. This paper aims to introduce the concept of resilience in industrial 5G systems to avoid production downtime. Our approach is based on methods of the Industrie 4.0 concept in order to be able to create digital twins for 5G-networked automation systems. The digital twin, based on the Asset Administration Shell, will allow collaboration between automation and communication systems, adapting the behaviour of the process in case of unforeseen events. For this, the communication system must be considered during the development of the digital twin.
The Dirichlet problem for elliptic systems with data in Köthe function spaces
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Dirichlet problem
second-order elliptic system
nontangential maximal function
Hardy-Littlewood maximal operator
Poisson kernel
Green function
Kothe function space
Muckenhoupt weight
Lebesgue space
variable exponent Lebesgue space
Lorentz space
Zygmund space
Orlicz space
Hardy space
Beurling algebra
Hardy-Beurling space
semigroup
Fatou type theorem

description: © 2016 European Mathematical Society. We show that the boundedness of the Hardy-Littlewood maximal operator on a Kothe function space X and on its Kothe dual X is equivalent to the well-posedness of the X-Dirichlet and X-Dirichlet problems in Rn + in the class of all second-order, homogeneous, elliptic systems, with constant complex coefficients. As a consequence, we obtain that the Dirichlet problem for such systems is well-posed for boundary data in Lebesgue spaces, variable exponent Lebesgue spaces, Lorentz spaces, Zygmund spaces, as well as their weighted versions. We also discuss a version of the aforementioned result which contains, as a particular case, the Dirichlet problem for elliptic systems with data in the classical Hardy space H1, and the Beurling-Hardy space HAp for p € (1,∞). Based on the well-posedness of the Lp-Dirichlet problem we then prove the uniqueness of the Poisson kernel associated with such systems, as well as the fact that they generate a strongly continuous semigroup in natural settings. Finally, we establish a general Fatou type theorem guaranteeing the existence of the pointwise nontangential boundary trace for null-solutions of such systems.
OEE-Box : einfacher Einstieg in die Welt der OEE
Creators: name: Wollert, Jörg
name: Gröniger, Marc
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Industrie 4.0
subject: OEE (Overall Equipment Effectiveness)
subject: Intelligenten Sensoren
subject: 621.3

description: Die Konzeptideen rund um Industrie 4.0 sind der Schlüssel für eine effiziente zukunftsorientierte Fabrikautomatisierung. Mit den Kernzielen horizontaler und vertikaler Integration, sowie einem durchgängigen Engineering sind hohe Anforderungen an die Feldebene, wie auch der Cloudintegration gestellt. Schlüssel für effiziente Wertschöpfungsketten sind Kennzahlen, die in der Feldebene erhoben und auf der Unternehmensebene ausgewertet werden. Eine wesentliche Kennzahl, wenn nicht sogar „die“ Kennzahl zur Ermittlung der Produktivität ist die OEE (Overall Equipment Effectiveness). Ein gezieltes OEE-Management ist damit Voraussetzung für die kontinuierliche Verbesserung von Produktionsprozesse. In diesem Beitrag wird ein Konzept und Prototyp vorgestellt, der eine ganzheitliche Erfassung der OEE in intelligenten Sensoren ermöglicht. Eine semantische Beschreibung ermöglicht eine Technologie-invariante Erhebung von OEE-Kennzahlen. Ein Proof-of- Concept für die Digitalisierung eines manuellen Handarbeitsplatz schließt den Beitrag ab.
Ethernet-APL Bandbreitenerweiterung für industrielle Anwendungen
Creators: name: Müller, Harald
name: Spielmann, Benedikt
name: Hähniche, Jörg
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Ethernet-APL
subject: Industrie 4.0
subject: Bandbreitenerweiterung
subject: 621.3

description: Ethernet Technologie ist in Prozessanlagen nur in den höheren Ebenen der Automatisierungspyramide im Einsatz, kaum in der Feldebene. Dabei bietet Ethernet viele Vorteile, die vor allem im Zuge der Digitalisierung und Industrie 4.0 genutzt werden könnten. Mit Ethernet-APL liegt nun eine Lösung vor, die den Einsatz von Ethernet mit 10 Mbit/s in der Prozessautomatisierung auch in einer rauen und explosionsgefährdeten Umgebung möglich macht. Auch wenn 10 Mbit/s gegenüber den bisherigen Feldbuslösungen ein Quantensprung in der verfügbaren Übertragungsbandbreite darstellen, zeigt sich in heutigen Betrachtungen der zu erwartenden Netzwerklasten schon bald auch die 10 Mbit/s als ein Engpass in der verfügbaren Bandbreite. In IEEE 802.3 existieren bereits Standards für 2-Leiter Ethernet mit 100 Mbit/s, 1Gbit/s und mehr. Die dort festgelegten maximalen Kabeldistanzen sind allerdings für Anwendungsfälle im Automobilbereich ausgelegt (max. 40m) und genügen somit nicht den Anforderungen anderer Industrien. Für den Nachweis der Realisierbarkeit einer Bandbreitenerweiterung auf 100 Mbit/s bei Beibehaltung der verwendeten Kabelstruktur wurden von Endress+Hauser in Kooperation mit der Fachhochschule Nordwestschweiz diverse Machbarkeitsstudien durchgeführt. Nach einer kurzen Einführung der Notwendigkeiten für eine Bandbreiten-Erweiterung bei Ethernet-APL sollen die Ergebnisse der 100 Mbit/s Untersuchungen im Detail vorgestellt und ein Ausblick auf die weiteren Aktivitäten gezeigt werden.
The covariogram determines three-dimensional convex polytopes
Creators: name: Bianchi, Gabriele
Publisher: name: arXiv
Year: 2008
Subjects: subject: Metric Geometry (math.MG)
subject: Classical Analysis and ODEs (math.CA)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: Primary 60D05; Secondary 52A22, 42B10, 52B10, 52A38

description: The cross covariogram g_{K,L} of two convex sets K, L in R^n is the function which associates to each x in R^n the volume of the intersection of K with L+x. The problem of determining the sets from their covariogram is relevant in stochastic geometry, in probability and it is equivalent to a particular case of the phase retrieval problem in Fourier analysis. It is also relevant for the inverse problem of determining the atomic structure of a quasicrystal from its X-ray diffraction image. The two main results of this paper are that g_{K,K} determines three-dimensional convex polytopes K and that g_{K,L} determines both K and L when K and L are convex polyhedral cones satisfying certain assumptions. These results settle a conjecture of G. Matheron in the class of convex polytopes. Further results regard the known counterexamples in dimension n>=4. We also introduce and study the notion of synisothetic polytopes. This concept is related to the rearrangement of the faces of a convex polytope.
description: 32 pages, 3 figures, major revision with respect to version previously sent by email to some colleagues
$f(R)$ gravity constrained by PPN parameters and stochastic background of gravitational waves
Creators: name: Capozziello, S.
name: De Laurentis, M.
name: Nojiri, S.
name: Odintsov, S. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze seven different viable $f(R)$-gravities towards the Solar System tests and stochastic gravitational waves background. The aim is to achieve experimental bounds for the theory at local and cosmological scales in order to select models capable of addressing the accelerating cosmological expansion without cosmological constant but evading the weak field constraints. Beside large scale structure and galactic dynamics, these bounds can be considered complimentary in order to select self-consistent theories of gravity working at the infrared limit. It is demonstrated that seven viable $f(R)$-gravities under consideration not only satisfy the local tests, but additionally, pass the above PPN-and stochastic gravitational waves bounds for large classes of parameters.
description: 23 pages, 8 figures
Funkkommunikation in der Wasserwirtschaft : Anforderungsprofile und Bewertung der Eignung von Low Power Wide Area Networks
Creators: name: Underberg, Lisa
name: Alex, Jens
name: Rauchhaupt, Lutz
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Wasserwirtschaft
subject: Low Power Wide Area Networks
subject: Funkkommunikationssysteme
subject: 621.3

description: Die Branche der Wasserwirtschaft ist traditionell mit für unsere Gesellschaft infrastrukturkritischen Aufgaben betraut. Entsprechend wird bei der Einführung neuer Technologien besondere Vorsicht walten gelassen. Gleichzeitig steigt der Optimierungsdruck auf Akteurinnen und Akteure der Wasserwirtschaft, beispielsweise durch steigende Bevölkerungsdichte bei gleichbleibendem Wassernetz. Vor diesem Hintergrund gewinnen Funkkommunikationssysteme an Relevanz, denn sie sind gut nachrüstbar und je nach Anforderung für einen Batteriebetrieb geeignet. In diesem Beitrag werden Anforderungsprofile an die Funkkommunikation von Anwendungen der Wasserwirtschaft vorgestellt. Die Profile wurden aus Umfragen im Rahmen von deutschlandweiten Workshops mit Akteurinnen und Akteuren der Wasserwirtschaft durchgeführt. Es wurden qualitative und quantitative Anforderungen erfasst. Es wurden zwei Profile extrahiert, die Anwendungen mit ähnlichen Anforderungen an die Funkkommunikation zusammenfassen: Anwendungen der Zustandsüberwachung und Regelungsanwendungen. Die Eignung von Low Power Wide Area Network (LPWAN)-Technologien wird sowohl für die Zustandsüberwachung als auch für Regelungsanwendungen diskutiert. Dabei werden Aspekte wie das Betreibermodell und das genutzte Frequenzspektrum berücksichtigt.
Single production of the doubly charged scalar in the littlest Higgs model
Creators: name: Yue, Chong-Xing
name: Zhao, Shuang
name: Ma, Wei
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Single production of the doubly charged scalars $Φ^{\pm\pm}$ via $eγ$, $ep$ and $pp$ collisions is studied in the context of the little Higgs$(LH)$ model. Our numerical results show that the new particles $Φ^{\pm\pm}$ can be abundantly produced and their possible signatures should be detected in future high energy linear $e^{+}e^{-}$ collider$(ILC)$. The cross section for single production of $Φ^{\pm\pm}$ at the $LHC$ is much smaller than that at the $ILC$ or the $THERA$.
description: Latex, 17 pages, 7 figures; revised version, adding some references and correcting some typos
Observation of the dependence on drift field of scintillation from nuclear recoils in liquid argon
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2013
Subjects: physics.ins-det
hep-ex

description: We have exposed a dual-phase liquid argon time projection chamber (LAr-TPC) to a low energy pulsed narrow-band neutron beam, produced at the Notre Dame Institute for Structure and Nuclear Astrophysics, to study the scintillation light yield of recoiling nuclei. Liquid scintillation counters were arranged to detect and identify neutrons scattered in the LAr-TPC and to select the energy of the recoiling nuclei. We report the observation of a significant dependence (up to 32%) on the drift field of liquid argon scintillation from nuclear recoils of energies between 10.8 and 49.9 keV. The field dependence is stronger at lower energies. Since it is the first measurement of such an effect in liquid argon, this observation is important because, to date, estimates of the sensitivity of LAr-TPC dark matter searches are based on the assumption that the electric field has only a small effect on the light yield from nuclear recoils. © 2013 American Physical Society.
Transport properties controlled by a thermostat: An extended dissipative particle dynamics thermostat
Creators: name: Junghans, Christoph
name: Praprotnik, Matej
name: Kremer, Kurt
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We introduce a variation of the dissipative particle dynamics (DPD) thermostat that allows for controlling transport properties of molecular fluids. The standard DPD thermostat acts only on a relative velocity along the interatomic axis. Our extension includes the damping of the perpendicular components of the relative velocity, yet keeping the advantages of conserving Galilei invariance and within our error bar also hydrodynamics. This leads to a second friction parameter for tuning the transport properties of the system. Numerical simulations of a simple Lennard-Jones fluid and liquid water demonstrate a very sensitive behaviour of the transport properties, e.g., viscosity, on the strength of the new friction parameter. We envisage that the new thermostat will be very useful for the coarse-grained and adaptive resolution simulations of soft matter, where the diffusion constants and viscosity of the coarse-grained models are typically too high/low, respectively, compared to all-atom simulations.
description: 6 pages, 4 figures
Absorption of phi mesons in near-threshold proton-nucleus reactions
Creators: name: Paryev, E. Ya.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the framework of the nuclear spectral function approach for incoherent primary proton--nucleon and secondary pion--nucleon production processes we study the inclusive $ϕ$ meson production in the interaction of 2.83 GeV protons with nuclei. In particular, the A-dependences of the absolute and relative $ϕ$ meson yields are investigated within the different scenarios for its in-medium width as well as for the cross section ratio $σ_{pn \to pnϕ}/{σ_{pp \to ppϕ}}$. Our model calculations take into account the acceptance window of the ANKE facility used in a recent experiment performed at COSY. They show that the pion--nucleon production channel contributes distinctly to the $ϕ$ creation in heavy nuclei in the chosen kinematics and, hence, has to be taken into consideration on close examination of the dependences of the phi meson yields on the target mass number with the aim to get information on its width in the medium. They also demonstrate that the experimentally unknown ratio $σ_{pn \to pnϕ}/{σ_{pp \to ppϕ}}$ has a weak effect on the A-dependence of the relative $ϕ$ meson production cross section at incident energy of present interest, whereas it is found to be appreciably sensitive to the phi in-medium width, which means that this relative observable can indeed be useful to help determine the above width from the direct comparison the results of our calculations with the future data from the respective ANKE-at-COSY experiment.
description: 16 pages, 9 figures
Stabilization of highly polar BiFeO3-like structure: A new interface design route for enhanced ferroelectricity in artificial perovskite superlattices
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: cond-mat.mtrl-sci

description: In ABO3 perovskites, oxygen octahedron rotations are common structural distortions that can promote large ferroelectricity in BiFeO3 with an R3c structure [1] but suppress ferroelectricity in CaTiO3 with a Pbnm symmetry [2]. For many CaTiO3-like perovskites, the BiFeO3 structure is a metastable phase. Here, we report the stabilization of the highly polar BiFeO3-like phase of CaTiO3 in a BaTiO3/CaTiO3 superlattice grown on a SrTiO3 substrate. The stabilization is realized by a reconstruction of oxygen octahedron rotations at the interface from the pattern of nonpolar bulk CaTiO3 to a different pattern that is characteristic of a BiFeO3 phase. The reconstruction is interpreted through a combination of amplitude-contrast sub-0.1-nm high-resolution transmission electron microscopy and first-principles theories of the structure, energetics, and polarization of the superlattice and its constituents. We further predict a number of new artificial ferroelectric materials demonstrating that nonpolar perovskites can be turned into ferroelectrics via this interface mechanism. Therefore, a large number of perovskites with the CaTiO3 structure type, which include many magnetic representatives, are now good candidates as novel highly polar multiferroic materials [3].
Anwendungsbeispiele eines offenen Industrial APP Marketplace
Creators: name: Heidemann, Patrick
name: Heymann, Sascha
name: Perez, Nissrin
name: Alsters, Jan
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Industrial APP Marketplace
subject: 621.3

description: Ein Anwendungsmarktplatz ist eine digitale Vertriebsplattform für Anwendungen (APPs), die meist im mobilen Kontext genutzt werden. Marktplätze wie der App Store von Apple oder Googles Play Store zeigen, wie florierend das Marktplatzgeschäft ist. Diese bieten Entwicklern eine Plattform für den Vertrieb ihrer Anwendungen und erreichen durch ein gemeinsames Ökosystem einen breiten Anwenderkreis. Ein Industrial APP Marketplace, kombiniert mit dem Industrial Internet of Things (IIoT), bietet im industriellen Bereich eine Lösung für eine schnellere Integration und Inbetriebnahme von industriellen Anwendungen in der Produktion aber z.B. auch Lösungen für den SmartCity Bereich. Dieses Paper zeigt zwei Anwendungsbeispiele eines herstellerneutralen Industrial APP Marketplaces, an den besondere Anforderungen an Interoperabilität, Usability und Sicherheit gestellt werden. Bei der Bewertung der Anwendungsbeispiele wird die gesamte Umsetzungskette vom Kauf bis zum Deployment einer APP auf ein Endgerät betrachtet. Bei den Anwendungsbeispielen handelt es sich um einen IIoT Ansatz, der eine direkte Internetverbindung der Endgeräte vorsieht und einen Edge Ansatz, bei dem Endgeräte in einem lokalen Netzwerk nur über ein gesichertes Edge- Gateway mit dem Internet kommunizieren können.
Fraction of Contact Binary Trojan Asteroids
Creators: name: Mann, Rita K.
name: Jewitt, David
name: Lacerda, Pedro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of an optical lightcurve survey of 114 Jovian Trojan asteroids conducted to determine the fraction of contact binaries. Sparse-sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow-up observations. This survey led to the discovery of two Trojan asteroids, (17365) and (29314) displaying large lightcurve ranges (~1 magnitude) and long rotation periods (< 2 rotations per day consistent with a contact binary nature. The optical lightcurves of both asteroids are well matched by Roche binary equilibrium models. Using these binary models, we find low densities of ~600 kg/m^3 and 800 kg/m^3, suggestive of porous interiors. The fraction of contact binaries is estimated to be between 6% and 10%, comparable to the fraction in the Kuiper Belt. The total binary fraction in the Trojan clouds (including both wide and close pairs) must be higher.
description: 13 pages, 19 figures, and 4 tables. Accepted for publication in AJ (2007 May 22)
Analyse von Entscheidungsprozessen beim VDI/VDE 2193 Bieterverfahren
Creators: name: Grunau, Sergej
name: Wisniewski, Lukasz
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: Bieterverfahren
subject: Industrie 4.0-Komponenten
subject: Verwaltungsschalen
subject: 621.3

description: Das Bieterverfahren nach VDI/VDE 2193 ermöglicht Verhandlungen zwischen Industrie 4.0-Komponenten. Jedoch ist die Umsetzung solcher Industrie 4.0-Komponenten, welche sich durch proaktive Verwaltungsschalen auszeichnen, nicht klar definiert. Besonders die Entscheidungsprozesse im Bieterverfahren, bei denen die Verhandlungsteilnehmer etwa über Angebotszu- oder absage bestimmen sollen, stellen eine Herausforderung in der Umsetzung dar. In dieser Arbeit wird ein konkreter Anwendungsfall aus der auftragsgesteuerten Produktion beschrieben. Anhand des Anwendungsfalls wird analysiert welche Kriterien für die Entscheidungsprozesse notwendig sind und wie diese und die Entscheidungsprozesse in proaktiven Verwaltungsschalen integriert werden können. Dazu zeigen wir eine mögliche Umsetzungsvariante proaktiver Verwaltungsschalen. Diese werden im wesentlichen mit Verwaltungsschalen-Applikationen und reaktiver Verwaltungsschalen realisiert, welche mittels Teilmodellen wie der hier beschriebenen „BiddingprocedureConfig“ miteinander interagieren können.
Recent results for the proton spin decomposition from lattice QCD
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: hep-lat
hep-ph

description: The exact decomposition of the proton spin has been a much debated topic, on the experimental as well as the theoretical side. In this talk we would like to report on recent non-perturbative results and ongoing efforts to explore the proton spin from lattice QCD. We present results for the relevant generalized form factors from gauge field ensembles that feature a physical value of the pion mass. These generalized form factors can be used to determine the total spin and angular momentum carried by the quarks. In addition we present first results for our ongoing effort to compute the angular momentum of the gluons in the proton.
Nuclear Structure Aspects of the Neutrinoless Double Beta Decay
Creators: name: Caurier, E.
name: Nowacki, F.
name: Poves, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this article, we analyze some nuclear structure aspects of the neutrinoless double beta decay nuclear matrix elements (NME), in the framework of the Interacting Shell Model. We give results for the decays of 48Ca, 76Ge, 82Se, 124Sn, 128Te, 130Te, and 136Xe, using improved effective interactions and valence spaces. We examine the dependence of the NME's on the effective interaction and the valence space, and analyze the effects of the short range correlations and the finite size of the nucleon. Finally we study the influence of the deformation on the values of the NME's.
description: To appear in EJP-A
How limit cycles and quasi-cycles are related in systems with intrinsic noise
Creators: name: Boland, Richard P.
name: Galla, Tobias
name: McKane, Alan J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Fluctuations and noise may alter the behavior of dynamical systems considerably. For example, oscillations may be sustained by demographic fluctuations in biological systems where a stable fixed point is found in the absence of noise. We here extend the theoretical analysis of such stochastic effects to models which have a limit cycle for some range of the model parameters. We formulate a description of fluctuations about the periodic orbit which allows the relation between the stochastic oscillations in the fixed point phase and the oscillations in the limit cycle phase to be elucidated. In the case of the limit cycle, a suitable transformation into a co-moving frame allow fluctuations transverse and longitudinal with respect to the limit cycle to be effectively decoupled. While longitudinal fluctuations are of a diffusive nature, those in the transverse direction follow a stochastic path more akin to an Ornstein-Uhlenbeck process. Their power spectrum is computed analytically within a van Kampen expansion in the inverse system size. This is carried out in two different ways, and the subsequent comparison with numerical simulations illustrates the effects that can occur due to diffusion in the longitudinal direction.
description: 15 pages, 14 figures
Clustering Properties of Low-Luminosity Star-Forming galaxies at z = 0.24 and 0.40 in the Subaru Deep Field
Creators: name: Nakajima, Aki
name: Shioya, Yasuhiro
name: Nagao, Tohru
name: Saito, Tomoki
name: Murayama, Takashi
name: Sasaki, Shunji S.
name: Yokouchi, Asuka
name: Taniguchi, Yoshiaki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present our analysis on the clustering properties of star-forming galaxies selected by narrow-band excesses in the Subaru Deep Field. Specifically we focus on Halpha emitting galaxies at z = 0.24 and z = 0.40 in the same field, to investigate possible evolutionary signatures of clustering properties of star-forming galaxies. Based on the analysis on 228 Halpha emitting galaxies with 39.8 < log L(Halpha) < 40.8 at z = 0.40, we find that their two-point correlation function is estimated as xi = (r/1.62^{+0.64}_{-0.50} Mpc)^{-1.84 +/- 0.08}. This is similar to that of Halpha emitting galaxies in the same Halpha luminosity range at z = 0.24, xi = (r/1.88^{+0.60}_{-0.49} Mpc)^{-1.89 +/- 0.07}. These correlation lengths are smaller than those for the brighter galaxy sample studied by Meneux et al. (2006) in the same redshift range. The evolution of correlation length between z = 0.24 and z = 0.40 is interpreted by the gravitational growth of the dark matter halos.
description: 16 pages, 7 figures, PASJ, Vol.60, No.6, in press
Preconditioned eigensolvers for large-scale nonlinear Hermitian eigenproblems with variational characterizations. I. extreme eigenvalues
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: Nonlinear Hermitian eigenproblems
variational principle
preconditioned conjugate gradient
convergence analysis

description: © 2016 American Mathematical Society. Efficient computation of extreme eigenvalues of large-scale linear Hermitian eigenproblems can be achieved by preconditioned conjugate gradient (PCG) methods. In this paper, we study PCG methods for computing extreme eigenvalues of nonlinear Hermitian eigenproblems of the form T(λ)v = 0 that admit a nonlinear variational principle. We investigate some theoretical properties of a basic CG method, including its global and asymptotic convergence. We propose several variants of single-vector and block PCG methods with de- flation for computing multiple eigenvalues, and compare them in arithmetic and memory cost. Variable indefinite preconditioning is shown to be effective to accelerate convergence when some desired eigenvalues are not close to the lowest or highest eigenvalue. The efficiency of variants of PCG is illustrated by numerical experiments. Overall, the locally optimal block preconditioned conjugate gradient (LOBPCG) is the most efficient method, as in the linear setting.