cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Embedding a Deterministic BFT Protocol in a Block DAG
Creators: name: Schett, Maria A
name: Danezis, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: This work formalizes the structure and protocols underlying recent distributed systems leveraging block DAGs, which are essentially encoding Lamport's happened-before relations between blocks, as their core network primitives. We then present an embedding of any deterministic Byzantine fault tolerant protocol $\mathcal{P}$ to employ a block DAG for interpreting interactions between servers. Our main theorem proves that this embedding maintains all safety and liveness properties of $\mathcal{P}$. Technically, our theorem is based on the insight that a block DAG merely acts as an efficient reliable point-to-point channel between instances of P while also using $\mathcal{P}$ for efficient message compression.
Super-Zeeman Embedding Models on N-Supersymmetric World-Lines
Creators: name: Doran, C. F.
name: Faux, M. G.
name: Gates,, S. J.
name: Hubsch, T.
name: Iga, K. M.
name: Landweber, G. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a model of an electrically charged magnetic dipole with arbitrary N-extended world-line supersymmetry, which exhibits a supersymmetric Zeeman effect. By including supersymmetric constraint terms, the ambient space of the dipole may be tailored into an algebraic variety, and the supersymmetry broken for almost all parameter values. The so exhibited obstruction to supersymmetry breaking refines the standard one, based on the Witten index alone.
description: 13 pages, 4 figures
Additional file 1 of Lack of CD34 delays bacterial endotoxin-induced lung inflammation
Creators: name: Aulakh, Gurpreet K.
name: Sushmita Maltare
name: Singh, Baljit
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Figure S1. Experiment Design. Figure S2. a-d: Lung immune-fluorescence quantification. Table S1. BAL cytokine p-level statistics.
การศึกษาปัจจัยที่มีผลต่อพฤติกรรมการเผชิญปัญหาของนักศึกษา มหาวิทยาลัยศิลปากร พระราชวังสนามจันทร์
Creators: name: บุรียา แตงพันธ์
name: คณิต เขียววิชัย
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: พฤติกรรมการเผชิญปัญหา, แบบมุ่งแก้ปัญหา, วัยรุ่น, นักศึกษามหาวิทยาลัยศิลปากร, Problem-forcused coping behavior, Adolescence, Silpakorn University students

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
The Three Site Model at One-Loop
Creators: name: Chivukula, R. Sekhar
name: Matsuzaki, Shinya
name: Simmons, Elizabeth H.
name: Tanabashi, Masaharu
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this paper we compute the one-loop chiral logarithmic corrections to all O(p^4) counterterms in the three site Higgsless model. The calculation is performed using the background field method for both the chiral- and gauge-fields, and using Landau gauge for the quantum fluctuations of the gauge fields. The results agree with our previous calculations of the chiral-logarithmic corrections to the S and T parameters in 't Hooft-Feynman gauge. The work reported here includes a complete evaluation of all one-loop divergences in an SU(2) x U(1) nonlinear sigma model, corresponding to an electroweak effective Lagrangian in the absence of custodial symmetry.
description: 40 pages, nine included eps figures. Minor corrections made
ความสัมพันธ์ระหว่างวัฒนธรรมทางการเมืองแบบปรึกษาหารือกับการกำหนดนโยบายสาธารณะเพื่อพัฒนาเทศบาลนครหาดใหญ่
Creators: name: วิศรุตา ทองแกมแก้ว
name: เพ็ญนภา จันทร์แดง
name: บุณิกา จันทร์เกตุ
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: วัฒนธรรมทางการเมืองแบบปรึกษาหารือ, การกำหนดนโยบายสาธารณะ, เทศบาลนครหาดใหญ่, Deliberative political culture, Public policy formulation, Hatyai Municipality

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
Combined first-principles calculations of electron-electron and electron-phonon self-energies in condensed systems
Creators: name: Yang, Han
name: Govoni, Marco
name: Kundu, Arpan
name: Galli, Giulia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We present a method to efficiently combine the computation of electron-electron and electron-phonon self-energies, which enables the evaluation of electron-phonon coupling at the $G_0W_0$ level of theory for systems with hundreds of atoms. In addition, our approach, which is a generalization of a method recently proposed for molecules [J. Chem. Theory Comput. 2018, 14, 6269-6275], enables the inclusion of non-adiabatic and temperature effects at no additional computational cost. We present results for diamond and defects in diamond and discuss the importance of numerically accurate $G_0W_0$ band structures to obtain robust predictions of zero point renormalization (ZPR) of band gaps, and of the inclusion of non-adiabatic effect to accurately compute the ZPR of defect states in the band gap.
Stochastic Models of Neural Plasticity: A Scaling Approach
Creators: name: Robert, Philippe
name: Vignoud, Gaetan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: In neuroscience, synaptic plasticity refers to the set of mechanisms driving the dynamics of neuronal connections, called synapses and represented by a scalar value, the synaptic weight. A Spike-Timing Dependent Plasticity (STDP) rule is a biologically-based model representing the time evolution of the synaptic weight as a functional of the past spiking activity of adjacent neurons. A general mathematical framework has been introduced in~arXiv:2010.08195. In this paper we develop and investigate a scaling approach of these models based on several biological assumptions. Experiments show that long-term synaptic plasticity evolves on a much slower timescale than the cellular mechanisms driving the activity of neuronal cells, like their spiking activity or the concentration of various chemical components created/suppressed by this spiking activity. For this reason, a scaled version of the stochastic model of~arXiv:2010.08195 is introduced and a limit theorem, an averaging principle, is stated for a large class of plasticity kernels. A companion paper~arXiv:2010.08790 is entirely devoted to the tightness properties used to prove these convergence results. These averaging principles are used to study two important STDP models: pair-based rules and calcium-based rules. Our results are compared with the approximations of neuroscience STDP models. A class of discrete models of STDP rules is also investigated for the analytical tractability of its limiting dynamical system.
description: arXiv admin note: substantial text overlap with arXiv:2010.08195
Additional file 1 of Enhanced contextual fear memory in peroxiredoxin 6 knockout mice is associated with hyperactivation of MAPK signaling pathway
Creators: name: Sarayut Phasuk
name: Tanita Pairojana
name: Pavithra Suresh
name: Chee-Hing Yang
name: Sittiruk Roytrakul
name: Huang, Shun-Ping
name: Chien-Chang Chen
name: Narawut Pakaprot
name: Supin Chompoopong
name: Sutisa Nudmamud-Thanoi
name: Liu, Ingrid Y.
Publisher: name: figshare
Year: 2021
Subjects: subject: Molecular Biology
subject: Neuroscience
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Figure S1–S6. The characteristics of Prdx6−/− mice (Fig. S1). Expression of EGFP in the hippocampus of Prdx6−/− mice (Fig. S2). Immunostaining of mPRDX6 expressed in the amygdala and prefrontal cortex (Fig. S3). The level of reactive oxygen species (ROS) measured by superoxide-sensitive DHE staining in hippocampal CA1 and CA3 regions of Prdx6+/+ and Prdx6−/− mice (Fig. S4). Co-localization of PRDX6 with GFAP in the amygdala (Fig. S5) and prefrontal cortex (Fig. S6).
Divergence of the Grüneisen ratio at symmetry-enhanced first-order quantum phase transitions
Creators: name: Beneke, Charlotte
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Studies of the Grüneisen ratio, i.e., the ratio between thermal expansion and specific heat, have become a powerful tool in the context of quantum criticality, since it was shown theoretically that the Grüneisen ratio displays characteristic power-law divergencies upon approaching the transition point of a continuous quantum phase transition. Here we show that the Grüneisen ratio also diverges at a symmetry-enhanced first-order quantum phase transition, albeit with mean-field exponents, as the enhanced symmetry implies the vanishing of a mode gap which is finite away from the transition. We provide explicit results for simple pseudo-spin models, both with and without Goldstone modes in the stable phases, and discuss implications.
description: 10 pages, 7 figures
The Joint Extraction of m_s and V_us From Hadronic Tau Decay Data
Creators: name: Maltman, K.
name: Wolfe, C. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss the simultaneous determination of m_s and V_us from flavor-breaking hadronic tau decay sum rules, focussing on weight choices designed to better control problems associated with the slow convergence of the relevant integrated D=2 OPE series. The results are found to display improved stability and consistency relative to those of conventional analyses based on the ``(k,0) spectral weights''. The results for m_s agree well with those of recent strange scalar sum rule and strange pseudoscalar sum rule and lattice analyses. Results for V_us agree within errors with those of lattice-input-based K_{ell 3} and Gamma [K_{mu 2}]/Γ[pi_{mu 2}] analyses. Very significant error reductions are shown to be expected, especially for V_us, once improved strange spectral data from the B factory experiments becomes available.
description: 8 pages, 5 figures, prepared for the Proceedings of the 9th International Workshop on Tau Lepton Physics (Tau'06), Pisa, Italy
Nonequilibrium functional renormalization group for interacting quantum systems
Creators: name: Jakobs, Severin G.
name: Meden, Volker
name: Schoeller, Herbert
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We propose a nonequilibrium version of functional renormalization within the Keldysh formalism by introducing a complex valued flow parameter in the Fermi or Bose functions of each reservoir. Our cutoff scheme provides a unified approach to equilibrium and nonequilibrium situations. We apply it to nonequilibrium transport through an interacting quantum wire coupled to two reservoirs and show that the nonequilibrium occupation induces new power law exponents for the conductance.
description: 5 pages, 2 figures; published version
การเมืองเรื่องการเลือกตั้ง: ศึกษาการหาเสียงเลือกตั้งวันที่ 3 กรกฎาคม พ.ศ. 2553 เขตเลือกตั้งที่ 5 จังหวัดเชียงใหม่
Creators: name: สุรชัย ตั้งมกรา
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: การเลือกตั้ง, การรณรงค์หาเสียง, กลุ่มคนเสื้อแดง, Election, Election Campaign, Red Shirt Group

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
ปัญหาการเสียภาษีโรงเรือนและที่ดินของประชาชนในเขตเทศบาลตำบลเชียงรากน้อย อำเภอบางปะอิน จังหวัดพระนครศรีอยุธยา
Creators: name: สุพรรณษา สุขเจริญ
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: ปัญหา, ภาษีโรงเรือนและที่ดิน, ประชาชน, Problems, Property Tax, People

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
A method to determine wall shear stress from mean profiles in turbulent boundary layers
Creators: name: Kumar, Praveen
name: Mahesh, Krishnan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The direct measurement of wall shear stress in turbulent boundary layers (TBL) is challenging, therefore requiring it to be indirectly determined from mean profile measurements. Most popular methods assume the mean streamwise velocity to satisfy either a logarithmic law in the inner layer or a composite velocity profile with many tuned constants for the entire TBL, both of which require reliable data from the inner layer. The presence of roughness and pressure gradient brings additional complications where most existing methods either fail or require significant modification. A novel method is proposed to determine the wall shear stress in zero pressure gradient TBL from measured mean profiles, without requiring near-wall data. The method is based on the stress model of Kumar and Mahesh [Phys. Rev. Fluids 6, 024603 (2021)], who developed accurate models for mean stress and wall-normal velocity in zero pressure gradient TBL. The proposed method requires a single point measurement of mean streamwise velocity and mean shear stress in the outer layer, preferably between $20$ to $50 \%$ of the TBL, and an estimate of boundary layer thickness and shape factor. The method can handle wall roughness without modification and is shown to predict friction velocities to within $3 \%$ over a range of Reynolds number for both smooth and rough wall zero pressure gradient TBL. In order to include the pressure gradients effects, the work of Kumar and Mahesh [Phys. Rev. Fluids 6, 024603 (2021)] is revisited to derive a novel model for both mean stress and wall-normal velocity in pressure gradient TBL, which is then used to formulate a method to obtain the wall shear stress from the profile data. Overall, the proposed method is shown to be robust and accurate for a variety of pressure gradient TBL.
description: 19 pages, 22 figures, accepted to Experiments in Fluids
Spectra of Quarkonia at Finite Temperature
Creators: name: Matrasulov, D. U.
name: Khanna, F. C.
name: Butanov, Kh. T.
name: Rakhimov, Kh. Yu.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Finite-temperature spectra of heavy quarkonia are calculated by combining potential model and thermofield dynamics formalisms. The mass spectra of the heavy quarkonia with various quark contents are calculated. It is found that binding mass of the quarkonium decreases as temperature increases.
description: 12 pages, 1 figure. To appear Mod.Phys.Lett. A
ความพึงพอใจในการจัดสวัสดิการที่ส่งผลต่อความผูกพันต่อองค์การของบุคลากรกระทรวงสาธารณสุข: กรณีศึกษาโรงพยาบาลบางบัวทอง
Creators: name: ภัทราภรณ์ ฮุงหวล
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: ความพึงพอใจในการจัดสวัสดิการ, ความผูกพันต่อองค์การ, โรงพยาบาลบางบัวทอง, Satisfaction with Welfare Provision, Organizational Commitment, Bangbuathong Hospital

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
Energy balance and energy correction in dynamics of classical spin systems
Creators: name: Garanin, Dmitry A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Energy-correction method is proposed as an addition to mainstream integrators for equations of motion of systems of classical spins. This solves the problem of non-conservation of energy in long computations and makes mainstream integrators competitive with symplectic integrators for spin systems that for different-site interactions conserve the energy explicitly. The proposed method is promising for spin systems with single-site interactions for which symplectic integrators do not conserve energy and thus have no edge against mainstream integrators. From the energy balance in the spin system with a phenomenological damping and Langevin fields, a formula for the dynamical spin temperature in the presence of single-site anisotropy is obtained.
description: 7 PR pages, 6 figures
Precise Numerical Solutions of Potential Problems Using Crank-Nicholson Method
Creators: name: Kang, Daekyoung
name: Won, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computational Physics (physics.comp-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A new numerical treatment in the Crank-Nicholson method with the imaginary time evolution operator is presented in order to solve the Schrödinger equation. The original time evolution technique is extended to a new operator that provides a systematic way to calculate not only eigenvalues of ground state but also of excited states. This new method systematically produces eigenvalues with accuracies of eleven digits with the Cornell potential that covers non-perturbative regime. An absolute error estimation technique based on a power counting rule is implemented. This method is examined with exactly solvable problems and produces the numerical accuracy down to 10$^{-11}$.
description: 10 pages, 1 figure. Submitted to Phys. Rev. Lett
ศักยภาพชุมชนในการจัดการท่องเที่ยวโดยชุมชน: กรณีศึกษาตลาดนํ้าอัมพวา
Creators: name: วรรณวิมล ภู่นาค
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2015
Subjects: ศักยภาพชุมชนในการจัดการท่องเที่ยว, การมีส่วนร่วม, ผลกระทบ, The potential community tourism management, Participating, Effect

description: 1, 26, วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์
Veränderungsprojekte im Spital : hören Sie auf Ihre Mitarbeitenden
Creators: name: Frei, Rebecca
name: Spiess, Kurt
Publisher: name: H+ Die Spitäler der Schweiz
Year: 2004
Subjects: Veränderung
Mitarbeiter
IVM
Wandel
362.11: Krankenhäuser und verwandte Einrichtungen

description: Der Umgang von Mitarbeitenden mit Wandel ist Thema eines Forschungsprojekts des Instituts für Verwaltungs-Management der Zürcher Hochschule Winterthur. In fünf Betrieben des öffentlichen Sektors, darunter zwei Kliniken, sind Gespräche und Interviews und eine umfassende schriftliche Befragung durchgeführt worden. Die Auftraggeber erhielten eine differenzierte Auswertung der Mitarbeiterbefragung und im Sinne eines Benchmarkings einen Quervergleich der Resultate aller fünf Befragungen.
Die zwei beteiligten Kliniken, die Rehaklinik Rheinfelden und die Klinik Barmelweid, haben beide substantielle Veränderungen hinter sich, die im Zentrum der Befragung standen. Der Artikel bietet einen Überblick über die Einschätzung des Projekts durch die Mitarbeiter und zeigt, welche Punkte bei diesen beiden Change-Projekten im Spitalumfeld von zentraler Bedeutung sind.
Additional file 2 of Circadian clock gene Clock-Bmal1 regulates cellular senescence in Chronic obstructive pulmonary disease
Creators: name: Li, Lingling
name: Zhang, Min
name: Zhao, Chunyang
name: Cheng, Yusheng
name: Liu, Chuanmei
name: Shi, Minhua
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Physiology
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: Hematology
subject: Plant Biology

description: Additional file 2.
Majorana and the quasi-stationary states in Nuclear Physics
Creators: name: Di Grezia, E.
name: Esposito, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A complete theoretical model describing artificial disintegration of nuclei by bombardment with alpha-particles, developed by Majorana as early as in 1930, is discussed in detail alongside the basic experimental evidences that motivated it. By following the quantum dynamics of a state resulting from the superposition of a discrete state with a continuum one, whose interaction is described by a given potential term, Majorana obtained (among the other predictions) the explicit expression for the integrated cross section of the nuclear process, which is the direct measurable quantity of interest in the experiments. Though this is the first application of the concept of quasi-stationary states to a Nuclear Physics problem, it seems also that the unpublished Majorana's work anticipates by several years the related seminal paper by Fano on Atomic Physics.
description: latex, amsart, 13 pages
Generative KI in der Unternehmenskommunikation : Implikationen und strategische Handlungsansätze für Kommunikator:innen und Kommunikationsführungskräfte
Creators: name: Willi, Sarah
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2024
Subjects: Generative künstliche Intelligenz
Change-Kommunikation
Unternehmenskommunikation
Corporate communication
Change communication
Generative Artificial Intelligence
006: Spezielle Computerverfahren
658.45: Unternehmenskommunikation

description: Die rasanten und anhaltenden Entwicklungen im Bereich der Generativen Künstlichen Intelligenz, angeführt durch den Siegeszug von ChatGPT, stellen viele Berufsfelder vor neue Herausforderungen – auch die Kommunikationsbranche. Die Forschung zur Generativen Künstlichen Intelligenz in der Kommunikation steht allerdings noch in den Anfängen. In dieser Arbeit wird zum einen anhand einer explorativen Inhaltsanalyse der aktuelle Stand der Praxis rund um Generative Künstliche Intelligenz beleuchtet. Zum anderen gewähren fünf Schweizer Kommunikationsführungskräfte Einblicke in den aktuellen Umgang mit GKI in ihren Abteilungen und schätzen die Implikationen dieser Technologie ein. Verbunden mit Ansätzen aus dem Change-Management und der Kommunikation in der digitalen Transformation, werden aus den Erkenntnissen dieser beiden Erhebungen Handlungsempfehlungen für Kommunikator:innen und Kommunikationsführungskräfte abgeleitet. Diese Denkanstösse fokussieren auf die massgebliche Rolle der Kommunikation im unternehmerischen Wandel, der durch die Generative Künstliche Intelligenz hervorgerufen wird. Auch reflektieren sie die Notwendigkeit, diese Rolle aktiv zu gestalten und einzufordern. Nicht zuletzt kann dies auch dazu beitragen, die strategische Bedeutung der Kommunikationsabteilung im Unternehmen zu stärken.
description: Due to the rapid, ongoing developments in the field of generative artificial intelligence, led by the successful advance of ChatGPT, many professional fields – including the communication industry – are facing new challenges. However, research on generative artificial intelligence in the field of communications is still limited. Therefore, this thesis aims to examine the current state of practice through an initial exploratory content analysis. In addition, five communication managers in leading positions in Switzerland provide insights into the current use of this technology within their departments and assess its implications. Based on approaches from change management and communications in the digital transformation, recommendations for action for communicators at all management levels are derived from the findings of these two analyses. The recommendations focus on the crucial role of communications in corporate change driven by generative artificial intelligence. They also reflect the need for communicators to actively shape and claim this role, which can ultimately help strengthen the strategic importance of the communications department within a company.
Network analysis of online bidding activity
Creators: name: Yang, I.
name: Oh, E.
name: Kahng, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: With the advent of digital media, people are increasingly resorting to online channels for commercial transactions. Online auction is a prototypical example. In such online transactions, the pattern of bidding activity is more complex than traditional online transactions; this is because the number of bidders participating in a given transaction is not bounded and the bidders can also easily respond to the bidding instantaneously. By using the recently developed network theory, we study the interaction patterns between bidders (items) who (that) are connected when they bid for the same item (if the item is bid by the same bidder). The resulting network is analyzed by using the hierarchical clustering algorithm, which is used for clustering analysis for expression data from DNA microarrays. A dendrogram is constructed for the item subcategories; this dendrogram is compared with a traditional classification scheme. The implication of the difference between the two is discussed.
description: 8 pages and 11 figures
Sub-Planck structures: Analogies between the Heisenberg-Weyl and SU(2) groups
Creators: name: Akhtar, Naeem
name: Sanders, Barry C.
name: Navarrete-Benlloch, Carlos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherent-state superpositions are of great importance for many quantum subjects, ranging from foundational to technological, e.g., from tests of collapse models to quantum metrology. Here we explore various aspects of these states, related to the connection between sub-Planck structures present in their Wigner function and their sensitivity to displacements (ultimately determining their metrological potential). We review this for the usual Heisenberg-Weyl algebra associated to a harmonic oscillator, and extend it to find analogous results for the $\mathfrak{su}(2)$ algebra, typically associated with angular momentum. In particular, in the Heisenberg-Weyl case, we identify phase-space structures with support smaller than the Planck action in both Schrödinger-cat-state mixtures and superpositions, the latter known as compass states. However, as compared to coherent states, compass states are shown to have $\sqrt{N}$-enhanced sensitivity against displacements in all phase-space directions ($N$ is the average number of quanta), whereas cat states and cat mixtures show such enhanced sensitivity only for displacements in specific directions. We then show that these same properties apply for analogous SU(2) states provided (i) coherent states are restricted to the equator of the sphere that plays the role of phase space for this group, (ii) we associate the role of the Planck action to the size of SU(2) coherent states in such a sphere, and (iii) we associate the role of $N$ with the total angular momentum.
Coordinated Scheduling of Electric Vehicles Within Zero Carbon Emission Hybrid AC/DC Microgrids
Creators: name: Bayani, Reza
name: Soofi, Arash Farokhi
name: Manshadi, Saeed D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Microgrids with AC/DC architecture benefit from advantages of both AC and DC power. In this paper, daily operation problem for a zero-carbon AC/DC microgrid in presence of electric vehicles (EVs) is considered. In this framework, EVs' batteries are mobile energy storage systems, which allow desirable operation of the microgrid during peak demand hours. This study shows in absence of storage system, EVs' batteries can be properly managed to satisfy the system requirements. In the case studies, several sensitivity analyses based on variations in battery degradation costs, solar irradiance, and inverter capacity are investigated.
description: ITEC 2021
Superlight small bipolarons
Creators: name: Hague, J. P.
name: Kornilovitch, P. E.
name: Samson, J. H.
name: Alexandrov, A. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recent angle-resolved photoemission spectroscopy (ARPES) has identified that a finite-range Fröhlich electron-phonon interaction (EPI) with c-axis polarized optical phonons is important in cuprate superconductors, in agreement with an earlier proposal by Alexandrov and Kornilovitch. The estimated unscreened EPI is so strong that it could easily transform doped holes into mobile lattice bipolarons in narrow-band Mott insulators such as cuprates. Applying a continuous-time quantum Monte-Carlo algorithm (CTQMC) we compute the total energy, effective mass, pair radius, number of phonons and isotope exponent of lattice bipolarons in the region of parameters where any approximation might fail taking into account the Coulomb repulsion and the finite-range EPI. The effects of modifying the interaction range and different lattice geometries are discussed with regards to analytical strong-coupling/non-adiabatic results. We demonstrate that bipolarons can be simultaneously small and light, provided suitable conditions on the electron-phonon and electron-electron interaction are satisfied. Such light small bipolarons are a necessary precursor to high-temperature Bose-Einstein condensation in solids. The light bipolaron mass is shown to be universal in systems made of triangular plaquettes, due to a novel crab-like motion. Another surprising result is that the triplet-singlet exchange energy is of the first order in the hopping integral and triplet bipolarons are heavier than singlets in certain lattice structures at variance with intuitive expectations. Finally, we identify a range of lattices where superlight small bipolarons may be formed, and give estimates for their masses in the anti-adiabatic approximation.
description: 31 pages. To appear in J. Phys.: Condens. Matter, Special Issue 'Mott's Physics'
Neutrino Mass, Dark Matter, and Leptogenesis
Creators: name: Ma, Ernest
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is proposed that dark matter is the origin of neutrino mass, thereby linking inexorably two undisputed (and seemingly unrelated) pieces of evidence for physics beyond the Standard Model. Leptogenesis at the TeV scale may also be possible, as well as a measurable contribution to the muon anomalous magnetic moment.
description: 7 pages, 2 figures
Molecular Dynamics Study of Polarizable Ion Models for Molten AgBr
Creators: name: Trullas, J.
name: Bitrian, V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Three different polarizable ion models for molten AgBr have been studied by molecular dynamics simulations. The three models are based on a rigid ion model (RIM) with a pair potential of the type proposed by Vashishta and Rahman for alpha-AgI, to which the induced dipole polarization of the ions is added. In the first (PIM1), the dipole moments are only induced by the local electric field; while in the other two (PIM1s and PIM2s), a short-range overlap induced polarization opposes the electrically induced dipole moments. In the PIM1 and the PIM1s only the anions are assumed polarizable, while in the PIM2s both species are polarizable. Long molecular dynamics simulations show that the PIM2s is an unphysical model since, for some improbable but possible critical configurations, the ions become infinitely polarized. The results of using the PIM1, the PIM1s, as well as those of the simple RIM, have been compared for the static structure and ionic transport properties. The PIM1 reproduces the broad main peak of the total structure factor present in the neutron diffraction data, although the smoothed three-peak feature of this broad peak is slightly overestimated. The structural results for the PIM1s are intermediate between those for the RIM and the PIM1, but fail to reproduce the experimental features within the broad principal peak. Concerning the ionic transport properties, the value of the conductivity obtained using PIM1 is in good agreement with experimental values, while the self-diffusion coefficients and the conductivity for the PIM1s are lower than the corresponding values using the PIM1 and the RIM.
description: 11 pages, 8 figures
Constructing LDPC Codes by 2-Lifts
Creators: name: Ma, Xudong
name: Yang, En-hui
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose a new low-density parity-check code construction scheme based on 2-lifts. The proposed codes have an advantage of admitting efficient hardware implementations. With the motivation of designing codes with low error floors, we present an analysis of the low-weight stopping set distributions of the proposed codes. Based on this analysis, we propose design criteria for designing codes with low error floors. Numerical results show that the resulting codes have low error probabilities over binary erasure channels.
description: 11 pages, 7 figures
Meldesysteme im Vergleich
Creators: name: Hohl, Daniel
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2024
Subjects: 658.1: Organisation und Finanzen

description: Durch die gesellschaftliche Entwicklung und den technischen Fortschritt kommt die Menschliche Leistungsfähigkeit an ihre Grenzen. Es müssen im Arbeitsalltag Risiken akzeptiert und verwaltet werden, die Leib und Leben von einzelnen gefährden oder ganze Kontinente beeinträchtigen können. Die Arbeit an den Grenzen des technisch und menschenmöglich Machbaren, erfordert daher präzise, tiefgreifende Anforderungen an die involvierten Menschen und die Organisation in denen sie arbeiten und den Umgang mit Gefahren und aller daraus ableiteten Risiken. In solchen Organisationen, auch High Reliable Organisation genannt, müssen Aufgaben, Verantwortung und Kommunikationskanäle klar zugeordnet sein, damit die Sicherheit gewährleistet werden kann. Alle Risiken müssen bekannt, bewertet und in einem akzeptierten Rahmen sein. Fehler die noch auftreten können, führen nicht zu einem versagen des Systems. Trotzdem sind diese Organisationen jederzeit bereit das Unerwartet zu managen. Die systematische Umsetzung durch den Deming Zyklus z.B., bedingt eine Rückmeldung aller Beteiligten bezüglich Gefahren und Vorkommnissen. Nur so können rechtzeitig Korrekturen vorgenommen werden, um die Sicherheit der Systeme zu verbessern. Die auf Sicherheitsforschung basierenden Meldesysteme, sehen sich jedoch zunehmend rechtlichen Einschränkungen gegenüber. Der Grundsatz der Straflosigkeit bei Meldungen, ist so nicht mehr haltbar. Es steht die Selbstbelastungsfreiheit, der Mitwirkungspflicht gegenüber, Datenschutzaspekte werden zunehmend schärfer, am Beispiel des kleinen Berufsgeheimnisses, welches mit der DSG Revision eingeführt wurde, sichtbar. Die rechtliche Verankerung der nachweislich sicherheitsfördernden Redlichkeitskultur, muss auf politischem Wege geprüft werden. Bis die bereits laufenden Versuche erfolgreich sind, kann das Risiko nur durch ein reifes allumfassendes Compliance Management System verwaltet werden, welches alle Risiken, insbesondere die stetig steigende Zahl der strafbewehrten rechtlichen Anforderungen einschliesst.
Ein geeigneter Ansatz für KMU dafür sind Anleitungen in der Form von Checklisten, welche auch für Nichtjuristen in KMU’s handhabbar sind. Eine Spezialsoftware ist eine Möglichkeit, die Anwendung einer No oder Low Code Plattform, ermöglicht eine organisationsgerechte, rechtssichere Verwaltung von Compliance-Themen auch in Systemen mit steigender Komplexität.
Atomic scale mechanisms controlling the oxidation of polyethylene: a first principles study
Creators: name: Ahn, Yunho
name: Colin, Xavier
name: Roma, Guido
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Understanding the degradation mechanisms of aliphatic polymers by thermal oxidation and radio-oxidation is very important in order to assess their lifetime in a variety of industrial applications. We focus here on polyethylene as a prototypical aliphatic polymer. Kinetic models describing the time evolution of the concentration of chain defects and radicals species in the material identify a relevant step in the formation and subsequent decomposition of transient hydroperoxides species, finally leading to carbonyl defects, in particular ketones. In this paper we first summarize the most relevant mechanistic paths proposed in the literature for hydroperoxide formation and decomposition and, second, revisit them using first principles calculations based on Density Functional Theory (DFT). We investigate the reaction paths for several chemical reactions, for both isolated alkane molecules and a crystalline model of polyethylene, and confirm, in some cases, the accepted activation energies; in some other cases, we challenge the accepted view finding alternative, more favourable, reaction paths for which we estimate the activation energy. We highlight the infuence of the environment -- crystalline or not -- on the outcome of some of the studied chemical reactions. A remarkable results of our calculations is that hydroxyl radicals play an important role in the decomposition of hydroperoxides. Based on our findings, it should be possible to improve the set of equations and parameters used in current kinetic simulations of polyethylene radio-oxidation.
El Roque de Los Muchachos Site Characteristics. II. Analysis of Wind, Relative Humidity and Air Pressure
Creators: name: Lombardi, G.
name: Zitelli, V.
name: Ortolani, S.
name: Pedani, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present an analysis of wind speed, wind direction, relative humidity and air pressure taken at TNG, CAMC and NOT at Observatorio del Roque de Los Muchachos, in the Canary Islands. Data are compared in order to check local variations and both long term and short term trends of the microclimate. Furthermore, influence of wind speed on the astronomical seeing is estimated to the aim to better understand the influence of wide scale parameters on local meteorological data. The three telescopes show different prevailing wind direction, wind speed, relative humidity and air pressure confirming differences in local microclimate. We found that seeing deteriorates when wind speed is lower than 3.3 m/s. Comparison in terms of wind speed and high relative humidity (> 90%) shows that TNG seems to have optimal observational conditions with respect to CAMC and NOT. Air pressure analysis shows that ORM is dominated by high pressure. Short time variations of pressure anticipate temperature variations tipically by 2-3 hours, this property vanishes in time scales higher than some hours and disappear in longer time scales.
description: 10 pages, 9 figures, accepted for publication in PASP
Αξιοποίηση αποβλήτων-σπόρων ροδιού με εκχύλιση και ενθυλάκωση ελαίου
Creators: name: Καλαμαρά, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Έλαιο σπόρων ροδιού
Εκχύλιση
Ενθυλάκωση
Pomegranate seed oil
Extraction
Encapsulation

description: Σκοπός της παρούσας διατριβής είναι η ανάπτυξη και η βελτιστοποίηση μίας μεθόδου αξιοποίησης των σπόρων ροδιού που βασίζεται στην εκχύλιση του περιεχόμενου ελαίου και ακόλουθη ενθυλάκωσή του, με στόχο την προσθήκη του σε διάφορα τρόφιμα. Η μέθοδος που εφαρμόσθηκε για την εξαγωγή του ελαίου ήταν η εκχύλιση με εφαρμογή άμεσων υπερήχων, με διαλύτη κανονικό εξάνιο. Ακολούθησε η ενθυλάκωση του ελαίου με τη μέθοδο της ξήρανσης ψεκασμού. Ως φορείς ενθυλάκωσης χρησιμοποιήθηκαν τα εξής: σκόνη άπαχου γάλακτος, μαλτοδεξτρίνη, μίγμα μαλτοδεξτρίνης/σκόνης άπαχου γάλακτος, μίγμα μαλτοδεξτρίνης/πρωτεΐνης ορού γάλακτος και μίγμα μαλτοδεξτρίνης/αραβικού κόμμεος. Οι εξεταζόμενες παράμετροι της διεργασίας ήταν το είδος του μέσου ενθυλάκωσης, η αναλογία ελαίου/μέσου ενθυλάκωσης , η θερμοκρασία εισόδου αέρα ξήρανσης, ο ρυθμός ροής αέρα ξήρανσης και η συγκέντρωση στερεών στο ρευστό τροφοδοσίας
description: In this work, a new method for pomegranate seeds application was developed based on the ultrasound-assisted extraction of seed oil and its subsequent encapsulation by spray drying. Ultrasound extraction with direct immersion of the probe into the solution was carried out for the extraction of the oil, by using n-Hexane as a solvent. The extracted oil was afterwards encapsulated with the method of spray drying. Different materials (skimmed milk powder, maltodextrin, maltodextrin/skimmed milk powder, maltodextrin/whey protein isolate, maltodextrin/gum arabic) were used as encapsulating agents of seed oil. Ratio of core to wall material, inlet air temperature, drying air flow rate, and feed solids concentration were the factors investigated with respect to encapsulation efficiency using a central composite design
The $ν$MSM, Inflation, and Dark Matter
Creators: name: Shaposhnikov, Mikhail
name: Tkachev, Igor
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show how to enlarge the $ν$MSM (the minimal extension of the standard model by three right-handed neutrinos) to incorporate inflation and provide a common source for electroweak symmetry breaking and for right-handed neutrino masses. In addition to inflation, the resulting theory can explain simultaneously dark matter and the baryon asymmetry of the Universe; it is consistent with experiments on neutrino oscillations and with all astrophysical and cosmological constraints on sterile neutrino as a dark matter candidate. The mass of inflaton can be much smaller than the electroweak scale.
description: 9 pages, misprints corrected, final version appeared in Phys. Lett
Exploring DNA translocation through a nanopore via a multiscale Lattice-Boltzmann Molecular-Dynamics methodology
Creators: name: Melchionna, Simone
name: Fyta, Maria
name: Kaxiras, Efthimios
name: Succi, Sauro
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: A multiscale approach is used to simulate the translocation of DNA through a nanopore. Within this scheme, the interactions of the molecule with the surrounding fluid (solvent) are explicitly taken into account. By generating polymers of various initial configurations and lengths we map the probability distibutions of the passage times of the DNA through the nanopore. A scaling law behavior for the most probable of these times with respect to length is derived, and shown to exhibit an exponent that is in a good agreement with the experimental findings. The essential features of the DNA dynamics as it passes through the pore are explored.
description: 5 pages, 4 figures. to appear in International Journal of Modern Physics C
A decade of joint MOJAVE-Fermi AGN monitoring: localisation of the gamma-ray emission region
Creators: name: Kramarenko, I. G.
name: Pushkarev, A. B.
name: Kovalev, Y. Y.
name: Lister, M. L.
name: Hovatta, T.
name: Savolainen, T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Within the MOJAVE VLBA program (Monitoring of Jets in AGN with VLBA Experiments), we have accumulated observational data at 15 GHz for hundreds of jets in $γ$-ray bright active galactic nuclei since the beginning of the Fermi scientific observations in August 2008. We investigated a time delay between the flux density of AGN parsec-scale radio emission at 15 GHz and 0.1$-$300 GeV Fermi LAT photon flux, taken from constructed light curves using weekly and adaptive binning. The correlation analysis shows that radio is lagging $γ$-ray radiation by up to 8 months in the observer's frame, while in the source frame, the typical delay is about 2-3 months. If the jet radio emission, excluding the opaque core, is considered, significant correlation is found at greater time lags. We supplement these results with VLBI kinematics and core shift data to conclude that the dominant high-energy production zone is typically located at a distance of several parsecs from the central nucleus. We also found that quasars have on average more significant correlation peak, more distant $γ$-ray emission region from the central engine and shorter variability time scale compared to those of BL Lacertae objects.
description: 12 pages, 12 figures, accepted for publication in MNRAS
Διδακτικές Προσεγγίσεις της Αλβανικής Γλώσσας ως Δεύτερης Γλώσσας σε ένα Αλβανικό Κοινοτικό Σχολείο της Θεσσαλονίκης
Creators: name: Μαρίνα, Παρίζη Βασίλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Διδακτικές Μέθοδοι
Διγλωσσία
Κοινοτικά Σχολεία
Teaching Methods
Bilingualism
Community Schools

description: Η παρούσα εργασία επιχειρεί να διερευνήσει και να καταγράψει τις διδακτικές στρατηγικές και τις μεθοδολογικών προσεγγίσεις που χρησιμοποιούν οι εκπαιδευτικοί που διδάσκουν την μητρική γλώσσα ως δεύτερη γλώσσα στο Αλβανικό Κοινοτικό Σχολείο Θεσσαλονίκης «Μητέρα Τερέζα». Τόσο μέσα από το θεωρητικό, όσο και μέσα από το ερευνητικό μέρος επιδιώκεται η καταγραφή και η ανάδειξη της διαχείρισης θεμάτων διγλωσσίας, όπως είναι τα διδακτικά μοντέλα που χρησιμοποιούνται από δύο εκπαιδευτικούς του εν λόγω κοινοτικού σχολείου για τη διδασκαλία της Αλβανικής ως δεύτερης γλώσσας. Τα ερευνητικά ευρήματα της παρούσας μελέτης προέκυψαν μέσα από την υιοθέτηση της ποιοτικής μεθόδου για τη συλλογή δεδομένων. Συγκεκριμένα χρησιμοποιήθηκε η συμμετοχική παρατήρηση έξι διδασκαλιών στο κοινοτικό σχολείο και η μαγνητοφώνηση της διδασκαλίας στις δυο προχωρημένες τάξεις κατά τη χρονική περίοδο Ιανουάριο - Μάρτιο του 2017.
description: The present dissertation attempts to investigate and record the teaching strategies and methodological approaches used by teachers teaching mother tongue as a second language at the Albanian Community School of Thessaloniki "Mother Teresa". Both the theoretical and the research part seek to record and highlight the management of bilingual issues, such as the teaching models used by two teachers of this community school to teach Albanian as a second language. The research findings of this study have emerged through the use of a quality method for data collection. In particular, participatory observation of six teachings at the community school and the transcription of teaching in the two advanced classes that was used during the period January - March 2017.