cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the production of heavy axion-like particles in the accretion disks of gamma-ray bursts
Creators: name: Reynoso, Matias M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Heavy axion-like particles have been introduced in several scenarios beyond the Standard Model and their production in some astrophysical systems should be possible. In this work, we re-examine the possibility that these type of particles can be generated in the accretion disks of gamma-ray bursts (GRB), the most powerful events in the universe. If the produced axions decay into photons or $e^+e-$ pairs at the correct distances, a fireball is generated. We calculate the structure transient accretion disks in GRBs (density, temperature and thickness profiles) taking into account the effect of heavy axion emission as well as the rest of the relevant standard cooling processes. This allows us to obtain the values of the coupling constant g_{aN} in order for the axions not to become trapped, and we can also compute the emitted heavy axion luminosity from the entire disk. We find that for the couplings within the ranges found, then the mechanism for powering GRBs based on heavy axion production and decay becomes an alternative to the standard picture based upon magnetohydrodynamic processes and neutrino-antineutrino annihilation. Otherwise, if heavy axions are produced in the disk but their decay to takes place further away, the mechanism fails. Still, the decay products (gamma rays or electrons and positrons) should leave observable signatures which are not observed for different ranges of values of the coupling constants, depending on the mass of the heavy axion
description: 14 pages, 7 figures. Updated version that matches the one to be published on Physics Letters B
Apparent universality of $1/f$ spectra as an artifact of finite-size effects
Creators: name: Korzeniowska, M. A.
name: Theodorsen, A.
name: Rypdal, M.
name: Garcia, O. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Power spectral density scaling with frequency $f$ as $1/f^β$ and $β\approx 1$ is widely found in natural and socio-economic systems. Consequently, it has been suggested that such self-similar spectra reflect the universal dynamics of complex phenomena. Here, we show that for a superposition of uncorrelated pulses with a power-law distribution of duration times the estimated scaling exponents $\barβ$ depend on the system size. We derive a parametrized, closed-form expression for the power spectral density, and demonstrate that for $β\in [0,2]$ the estimated scaling exponents have a bias towards $\barβ=1$. For $β=0$ and $β=2$ the explicit logarithmic corrections to frequency scaling are derived. The bias is particularly strong when the scale invariance spans less than four decades in frequency. Since this is the case for the majority of empirical data, the boundedness of systems well described by the superposition of uncorrelated pulses may contribute to overemphasizing the universality of $1/f$.
description: 6 pages, 2 figures. Published by the Physical Review Research journal of the American Physical Society (https://link.aps.org/doi/10.1103/PhysRevResearch.5.L022066) under a CC-BY 4.0 International license (https://creativecommons.org/licenses/by/4.0/)
Atualização da formatação e normalização (ABNT) do arquivo relativo ao template da Revista Educação em Páginas (ISSN 2764-8028), da UESB, para 2024.
Creators: name: Nolasco, Marcelo
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 360205
subject: Technical writing

description: Arquivo relativo à formatação e normalização (ABNT) para o template da Revista Educação em Páginas (2764-8028),da UESB, atualizado em agosto de 2023.
Quantum atmosphere effective radii for different spin fields from quantum gravity inspired black holes
Creators: name: Gingrich, Douglas M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum atmosphere effective radii for the emission of spin-0, -1/2, -1, and -2 massless fields from Schwarzschild, Tangherlini, non-commutative geometry inspired, and polymeric black holes are calculated. The power observed from the black hole at spatial infinity taking greybody factors into account is compared to an equal-power black-body radiator of the same temperature but different effective radius. A large range of different radii are obtained for different spin fields and black holes. The equal-power black-body effective radius is not, in general, a good proxy for the location of the quantum atmosphere.
description: 10 pages, 5 tables, 0 figures
Generalization and Automation of Machine Learning-Based Intelligent Fault Classification for Rotating Machinery
Creators: name: Larocque-Villiers, Justin
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2024
Subjects: Predictive Maintenance
Machine Learning
Transfer Learning
Sensors
Convolutional Neural Networks
Signal Processing

description: This thesis leverages vibration-based unsupervised learning and deep transfer learning to reduce the manual labour involved in building algorithms that perform intelligent fault detection (IFD) on roller element bearings. A review of theory and literature in the field of IFD is presented, and challenges are discussed. An issue is then introduced; current machine learning models built for IFD show strong performance on a small subset of specific data, but do not generalize to a broader range of applications. Signal processing, machine learning, and transfer learning concepts are then explained and discussed. Time-frequency fingerprinting, as well as feature engineering, is used in conjunction with principal component analysis (PCA) to prepare vibration signals to be clustered by a gaussian mixture model (GMM). This process allows for the intelligent referral of data towards algorithms that have performed well on similar datasets and favours the re-use of domain-specific tasks. An algorithm is then proposed that promotes generalization in convolutional neural networks (CNNs) and simplifies the hyperparameter tuning process to allow machine learning models to be applied to a broader set of problems. The machine learning process is then automated as much as possible through meta learning and ensemble models: data similarity measurements are used to evaluate the data fit for transfer and propose training guidelines. Throughout the thesis, three open-source bearing fault datasets are used to test and validate the hypotheses. This thesis focuses on developing and adapting current deep learning models to succeed in challenging domains and real-world scenarios, while improving performance with unsupervised learning and transfer learning.
Classical and quantum dispersion-free coherent propagation by tailoring multi-modal coupling
Creators: name: Mandilara, A.
name: Valagiannopoulos, C. A.
name: Akulin, V. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It is shown that tailored breaking of the translational symmetry through weak scattering in waveguides and optical fibers can control chromatic dispersions of the individual modes at any order; thereby, it overcomes the problem of coherent classical and quantum signal transmission at long distances. The methodology is based on previously developed quantum control techniques and gives an analytic solution in ideal scattering conditions; it has been also extended to incorporate and correct non-unitary effects in the presence of weak back-scattering. In practice, it requires scatterers able to couple different modes and carefully designed dispersion laws giving a null average quadratic dispersion in the spectral vicinity of the operational frequency.
description: 9 pages, 6 figures. Updated figures
Density functional theory study of vacancy induced magnetism in Li$_{3}$N
Creators: name: Östlin, A.
name: Chioncel, L.
name: Burzo, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of lithium vacancies in the hexagonal structure of $α-$Li$_3$N, is studied within the framework of density functional theory. Vacancies ($\square$) substituting for lithium in $α-$Li$_2$(Li$_{1-x}\square_x$)N are treated within the coherent potential approximation as alloy components. According to our results long range N($p$)-ferromagnetism ($\sim 1$ $μ_B$) sets in for vacancy substitution within the [Li$_2$N] layers ($x \ge 0.7$) with no significant change in unit cell dimensions. By total energies differences we established that in-plane exchange couplings are dominant. Vacancies substituting inter-plane Li, leads to a considerable structural collapse ($c/a \approx 0.7$) and no magnetic moment formation.
One-loop correction to the photon velocity in Lorentz-violating QED
Creators: name: Satunin, Petr
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate a finite momentum-dependent part of the photon polarization operator in a simple model of Lorentz-violating quantum electrodynamics nonperturbatively at all orders of Lorentz-violating parameters. We sum one-particle reducible diagrams into the modified photon propagator, and determine the physical photon dispersion relation as the location of its pole. The photon dispersion relation, as well as its group velocity, acquires the one-loop momentum-dependent radiative correction. We constrain the Lorentz-violating parameters for heavy charged fermions (muon, $τ$-lepton, top-quark) from the photon timing observations.
description: 14 pages, revisited version
A complete classification of which $(n,k)$-star graphs are Cayley graphs
Creators: name: Sweet, Karimah
name: Li, Li
name: Cheng, Eddie
name: Lipták, László
name: Steffy, Daniel E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 05C25 (Primary), 20D05 (Secondary)

description: The $(n,k)$-star graphs are an important class of interconnection networks that generalize star graphs, which are superior to hypercubes. In this paper, we continue the work begun by Cheng et al.~(Graphs and Combinatorics 2017) and complete the classification of all the $(n,k)$-star graphs that are Cayley.
description: We have proved the conjecture in the first version, thus completed the classification of which $(n,k)$-star graphs are Cayley
Seiberg-Witten monopoles with multiple spinors on a surface times a circle
Creators: name: Doan, Aleksander
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: The Seiberg-Witten equation with multiple spinors generalises the classical Seiberg-Witten equation in dimension three. In contrast to the classical case, the moduli space of solutions $\mathcal{M}$ can be non-compact due to the appearance of so-called Fueter sections. In the absence of Fueter sections we define a signed count of points in $\mathcal{M}$ and show its invariance under small perturbations. We then study the equation on the product of a Riemann surface and a circle, describing $\mathcal{M}$ in terms of holomorphic data over the surface. We define analytic and algebro-geometric compactifications of $\mathcal{M}$, and construct a homeomorphism between them. For a generic choice of circle-invariant parameters of the equation, Fueter sections do not appear and $\mathcal{M}$ is a compact Kähler manifold. After a perturbation it splits into isolated points which can be counted with signs, yielding a number independent of the initial choice of the parameters. We compute this number for surfaces of low genus.
description: v3: minor changes
Codes in the Space of Multisets---Coding for Permutation Channels with Impairments
Creators: name: Kovačević, Mladen
name: Tan, Vincent Y. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences
subject: 94B25, 94B65, 94A40, 68P30, 68R05

description: Motivated by communication channels in which the transmitted sequences are subject to random permutations, as well as by certain DNA storage systems, we study the error control problem in settings where the information is stored/transmitted in the form of multisets of symbols from a given finite alphabet. A general channel model is assumed in which the transmitted multisets are potentially impaired by insertions, deletions, substitutions, and erasures of symbols. Several constructions of error-correcting codes for this channel are described, and bounds on the size of optimal codes correcting any given number of errors derived. The construction based on the notion of Sidon sets in finite Abelian groups is shown to be optimal, in the sense of the asymptotic scaling of code redundancy, for any "error radius" and any alphabet size. It is also shown to be optimal in the stronger sense of maximal code cardinality in various cases.
description: 14 pages, 5 figures. v1: conference version (ISIT'17). v5: extended version (IEEE Trans. Inf. Theory), includes parts of arXiv:1409.5276
Adiabatic limits and Kazdan-Warner equations
Creators: name: Doan, Aleksander
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the limiting behaviour of solutions to abelian vortex equations when the volume of the underlying Riemann surface grows to infinity. We prove that the solutions converge smoothly away from finitely many points. The proof relies on a priori estimates for functions satisfying generalised Kazdan-Warner equations. We relate our results to the work of Hong, Jost, and Struwe on classical vortices, and that of Haydys and Walpuski on the Seiberg-Witten equations with multiple spinors.
description: v4: minor changes
Accounting for plasma constituent mass effects in heavy fermion energy loss calculations in hot QED and QCD
Creators: name: Comadran, Marc
name: Manuel, Cristina
name: Carignano, Stefano
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We evaluate the collisional energy loss of a energetic fermion with mass $M$ propagating through a hot QED plasma with temperature $T$, including mass corrections, that is, keeping the mass $m$ of the fermion constituents of the plasma, assuming $m \ll T \ll M$. We use the bare theory to compute the contribution of hard momentum transfer collisions, and the Braaten-Pisarski resummed theory, amended with small mass corrections, for the contribution of low momentum transfer collisions, and compute the mass corrections at leading logarithmic accuracy in the regime where the energy of the heavy fermion obeys $E \ll M^2/T$. We use dimensional regularization to regulate all possible divergences in the computation. If the fermion mass is of order of the soft scale $eT$, where $e$ is the gauge coupling constant, the mass corrections are of the same order as pure perturbative corrections, while they can be substantial for larger values of $m$. We also evaluate the impact of this correction for a QCD plasma.
On Defects Between Gapped Boundaries in Two-Dimensional Topological Phases of Matter
Creators: name: Cong, Iris
name: Cheng, Meng
name: Wang, Zhenghan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Defects between gapped boundaries provide a possible physical realization of projective non-abelian braid statistics. A notable example is the projective Majorana/parafermion braid statistics of boundary defects in fractional quantum Hall/topological insulator and superconductor heterostructures. In this paper, we develop general theories to analyze the topological properties and projective braiding of boundary defects of topological phases of matter in two spatial dimensions. We present commuting Hamiltonians to realize defects between gapped boundaries in any $(2+1)D$ untwisted Dijkgraaf-Witten theory, and use these to describe their topological properties such as their quantum dimension. By modeling the algebraic structure of boundary defects through multi-fusion categories, we establish a bulk-edge correspondence between certain boundary defects and symmetry defects in the bulk. Even though it is not clear how to physically braid the defects, this correspondence elucidates the projective braid statistics for many classes of boundary defects, both amongst themselves and with bulk anyons. Specifically, three such classes of importance to condensed matter physics/topological quantum computation are studied in detail: (1) A boundary defect version of Majorana and parafermion zero modes, (2) a similar version of genons in bilayer theories, and (3) boundary defects in $\mathfrak{D}(S_3)$.
description: 21 pages, 13 figures. Parts are adapted from arXiv:1609.02037. v2: Corrected Eqs. 13-15; added references. Version to appear in Phys. Rev. B
A cellular topological field theory
Creators: name: Cattaneo, Alberto S.
name: Mnev, Pavel
name: Reshetikhin, Nicolai
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Topology (math.AT)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present a construction of cellular BF theory (in both abelian and non-abelian variants) on cobordisms equipped with cellular decompositions. Partition functions of this theory are invariant under subdivisions, satisfy a version of the quantum master equation, and satisfy Atiyah-Segal-type gluing formula with respect to composition of cobordisms.
description: Ver. 2: numerous expository improvements
On lepton non-universality in exclusive $b\to s \ell\ell$ decays
Creators: name: Hurth, T.
name: Mahmoudi, F.
name: Santos, D. Martinez
name: Neshatpour, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The LHCb measurements of certain ratios of decay modes testing lepton flavour non-universality might open an exciting world of new physics beyond the standard model. The latest LHCb measurements of R_K* offer some new insight beyond the previous measurement of R_K. We work out the present significance for non-universality, and argue that claims of 5 sigma deviations from the SM based on all present b -> s l+l- data including the ratios are misleading and are at present still based on guesstimates of hadronic power corrections in the b -> s l+l- angular observables. We demonstrate that only a small part of the luminosity of 50 fb^-1 foreseen to be accumulated by the LHCb will be needed to offer soon a definite answer to the present question whether we see a very small glimpse of lepton flavour non-universal new physics or not. We also present new predictions for other ratios based on our analysis of the present measurements of the ratios R_K^(*) and analyse if they are able to differentiate between various new physics options within the effective field theory at present or in the near future.
description: 12 pages, 2 figures. v2: Extended version with a detailed analysis of future prospects, references added. v3: Analysis on the present and future role of B_s -> mu+ mu- added
Genome-wide analyses of 200,453 individuals yield new insights into the causes and consequences of clonal hematopoiesis.
Creators: name: Kar, Siddhartha P
name: Quiros, Pedro M
name: Gu, Muxin
name: Jiang, Tao
name: Mitchell, Jonathan
name: Langdon, Ryan
name: Iyer, Vivek
name: Barcena, Clea
name: Vijayabaskar, MS
name: Fabre, Margarete A
name: Carter, Paul
name: Petrovski, Slavé
name: Burgess, Stephen
name: Vassiliou, George
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Article
/692/308/2056
/692/699/1541
/631/208/205/2138
article

description: Funder: British Heart Foundation (BHF); doi: https://doi.org/10.13039/501100000274
description: Clonal hematopoiesis (CH), the clonal expansion of a blood stem cell and its progeny driven by somatic driver mutations, affects over a third of people, yet remains poorly understood. Here we analyze genetic data from 200,453 UK Biobank participants to map the landscape of inherited predisposition to CH, increasing the number of germline associations with CH in European-ancestry populations from 4 to 14. Genes at new loci implicate DNA damage repair (PARP1, ATM, CHEK2), hematopoietic stem cell migration/homing (CD164) and myeloid oncogenesis (SETBP1). Several associations were CH-subtype-specific including variants at TCL1A and CD164 that had opposite associations with DNMT3A- versus TET2-mutant CH, the two most common CH subtypes, proposing key roles for these two loci in CH development. Mendelian randomization analyses showed that smoking and longer leukocyte telomere length are causal risk factors for CH and that genetic predisposition to CH increases risks of myeloproliferative neoplasia, nonhematological malignancies, atrial fibrillation and blood epigenetic ageing.
Gaussian eigenstate pinning in non-Hermitian quantum mechanics
Creators: name: Zeng, Qi-Bo
name: Lü, Rong
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a one-dimensional system subjected to a linearly varying imaginary vector potential, which is described by the single-particle continuous Schrödinger equation and is analytically solved. The eigenenergy spectrum is found to be real under open boundary condition (OBC) but forms a parabola in the complex energy plane under periodic boundary condition (PBC). The eigenstates always exhibit a modulated Gaussian distribution and are all pinned on the same position, which is determined by the imaginary vector potential and boundary conditions. These behaviors are in sharp contrast to the non-Hermitian skin effect (NHSE) in systems with constant imaginary vector potential, where the eigenstates are exponentially distributed under OBC but become extended under PBC. We further demonstrate that even though the spectrum under PBC is an open curve, the Gaussian type of NHSE still has a topological origin and is characterized by a nonvanishing winding number in the PBC spectrum. The energies interior to the parabola can support localized edge states under semi-infinite boundary condition. The corresponding tight-binding lattice models also show similar properties, except that the PBC spectrum forms closed loops. Our work opens a door for the study of quantum systems with spatially varying imaginary vector potentials.
description: 7 pages, 3 figures
Chromosomal painting in Charadrius collaris Vieillot, 1818 and Vanellus chilensis Molina, 1782 and an analysis of chromosomal signatures in Charadriiformes.
Creators: name: Pinheiro, Melquizedec Luiz Silva
name: Nagamachi, Cleusa Yoshiko
name: Ribas, Talita Fernanda Augusto
name: Diniz, Cristovam Guerreiro
name: O Brien, Patricia Caroline Mary
name: Ferguson-Smith, Malcolm Andrew
name: Yang, Fengtang
name: Pieczarka, Julio Cesar
Publisher: name: Apollo - University of Cambridge Repository
Year: 2022
Subjects: Research Article
Biology and life sciences
Research and analysis methods

description: Charadriiformes represent one of the largest orders of birds; members of this order are diverse in morphology, behavior and reproduction, making them an excellent model for studying evolution. It is accepted that the avian putative ancestral karyotype, with 2n = 80, remains conserved for about 100 million years. So far, only a few species of Charadriiformes have been studied using molecular cytogenetics. Here, we performed chromosome painting on metphase chromosomes of two species of Charadriidae, Charadrius collaris and Vanellus chilensis, with whole chromosome paint probes from Burhinus oedicnemus. Charadrius collaris has a diploid number of 76, with both sex chromosomes being submetacentric. In V. chilensi a diploid number of 78 was identified, and the Z chromosome is submetacentric. Chromosome painting suggests that chromosome conservation is a characteristic common to the family Charadriidae. The results allowed a comparative analysis between the three suborders of Charadriiformes and the order Gruiformes using chromosome rearrangements to understand phylogenetic relationships between species and karyotypic evolution. However, the comparative analysis between the Charadriiformes suborders so far has not revealed any shared rearrangements, indicating that each suborder follows an independent evolutionary path, as previously proposed. Likewise, although the orders Charadriiformes and Gruiformes are placed on sister branches, they do not share any signature chromosomal rearrangements.
Von Schulen und ihrem Umgang mit auffälligen Verhalten : eine qualitative Fallstudie über organisationale Einflussmöglichkeiten der Schulsozialarbeit
Creators: name: Emch, Patrice
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2023
Subjects: 371: Schulen und schulische Tätigkeiten

description: In Schulen kommen für den Umgang mit auffälligen Verhaltensweisen von Schüler:innen Präventions oder Interventionsprogramme zum Einsatz, bei denen Daten zur Wirksamkeit fehlen. Schulen wenden demnach Ansätze an, bei denen unklar ist, ob und welche Effekte sie haben. Es stellt sich die Frage, wie Schulen bei der Wahl eines solchen Programmes vorgehen. Die vorliegende Arbeit eruiert anhand einer organisationssoziologischen Perspektive, wie in der Schule der Bedarf für ein Programm in Erscheinung tritt, wie in der Folge darüber entschieden wird und welche organisationalen Auswirkungen damit verbunden sind. Als Ergebnis werden der Schulsozialarbeit Hinweise zu deren organisationalen Einflussmöglichkeiten geliefert, um wirksame Programme in Schulen zu fördern. Dafür wurden im Rahmen einer qualitativen Fallstudie Gruppendiskussionen in drei Primarschulhäusern des Kantons Zürich durchgeführt. Die Aussagen der Lehrpersonen, Schulleitungen, Fachlehrpersonen und Schulsozialarbeiter:innen wurden im Anschluss auf Basis einer inhaltlich strukturierenden qualitativen Inhaltsanalyse miteinander verglichen und organisationssoziologisch diskutiert. Die Ergebnisse zeigen, dass sich die untersuchten Prozesse in den porträtierten Schulen durch ihre Spezifika auszeichnen. Deutlich wird die Rolle der Schulleitung, welche entscheidenden Einfluss darauf hat, ob und wie Präventions-/Interventionsprogramme in Schulen umgesetzt werden. Sie legt fest, inwiefern die Programme in den bestehenden Schulstrukturen vernetzt werden und welche Priorität diese geniessen. Auf Basis dieser Erkenntnisse werden Anknüpfungspunkte für die SSA generiert. Ihr Handlungsspielraum bei der Förderung wirksamer Programme kann durch die Anwendung informaler Führungspraktiken erweitert werden. Insbesondere die Instrumente lateraler Führung, welche in Form von Verständigungs-, Macht- und Vertrauensprozessen in Erscheinung treten, kommen da- bei zur Anwendung.
Categorically Morita equivalent compact quantum groups
Creators: name: Neshveyev, Sergey
name: Yamashita, Makoto
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: Category Theory (math.CT)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We give a dynamical characterization of categorical Morita equivalence between compact quantum groups. More precisely, by a Tannaka-Krein type duality, a unital C*-algebra endowed with commuting actions of two compact quantum groups corresponds to a bimodule category over their representation categories. We show that this bimodule category is invertible if and only if the actions are free, with finite dimensional fixed point algebras, which are in duality as Frobenius algebras in an appropriate sense. This extends the well-known characterization of monoidal equivalence in terms of bi-Hopf-Galois objects.
description: 33 pages; v2: minor corrections
Counting the number of trigonal curves of genus 5 over finite fields
Creators: name: Wennink, Thomas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 11G20, 14H10, 14H50

description: The trigonal curves of genus 5 can be represented by projective plane quintics that have 1 singularity of delta invariant 1. Combining this with a partial sieve method for plane curves we count the number of such curves over any finite field. The main application is that this then gives the motivic Euler characteristic of the moduli space of trigonal curves of genus 5.
description: 23 pages, improved clarity
Wearing face mask detection using deep learning through COVID-19 pandemic
Creators: name: Khoramdel, Javad
name: Hatami, Soheila
name: Sadedel, Majid
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: During the COVID-19 pandemic, wearing a face mask has been known to be an effective way to prevent the spread of COVID-19. In lots of monitoring tasks, humans have been replaced with computers thanks to the outstanding performance of the deep learning models. Monitoring the wearing of a face mask is another task that can be done by deep learning models with acceptable accuracy. The main challenge of this task is the limited amount of data because of the quarantine. In this paper, we did an investigation on the capability of three state-of-the-art object detection neural networks on face mask detection for real-time applications. As mentioned, here are three models used, Single Shot Detector (SSD), two versions of You Only Look Once (YOLO) i.e., YOLOv4-tiny, and YOLOv4-tiny-3l from which the best was selected. In the proposed method, according to the performance of different models, the best model that can be suitable for use in real-world and mobile device applications in comparison to other recent studies was the YOLOv4-tiny model, with 85.31% and 50.66 for mean Average Precision (mAP) and Frames Per Second (FPS), respectively. These acceptable values were achieved using two datasets with only 1531 images in three separate classes.
description: Accepted to Scientia Iranica Journal
Klimawandel und Hochschullehre der Sozialen Arbeit : eine qualitative Untersuchung zur Bedeutung des Themas Klimawandel von Hochschullehrenden für die Entwicklung der Lehre in der Sozialen Arbeit
Creators: name: Ronchetti, Mauro
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2023
Subjects: 361: Sozialarbeit und Sozialhilfe
378: Hochschulbildung

description: Diese Master-Thesis befasst sich mit der Bedeutung des Themas Klimawandel für die Entwicklung der Lehre der Sozialen Arbeit. Da der Klimawandel und seine Folgen bestehende soziale Ungleichheiten verstärken und neue soziale Probleme mit sich bringen, ist es zentral, dass zukünftige Professionelle der Sozialen Arbeit über angemessene Kompetenzen und Kenntnisse verfügen, um auf diese Herausforderungen reagieren zu können. Das Ziel der vorliegenden Master- Thesis ist es zu untersuchen, wie Hochschullehrende der Sozialen Arbeit die Relevanz des Themas Klimawandel für die Lehre betrachten und basierend darauf Handlungsempfehlungen für die Entwicklung der Lehre der Sozialen Arbeit erarbeiten können. Dazu wurden leitfadenbasierte Expert:inneninterviews mit Hochschullehrenden der Sozialen Arbeit durchgeführt und diese mittels einer inhaltlich strukturierenden qualitativen Inhaltsanalyse ausgewertet. Die Ergebnisse der Untersuchungen geben Aufschluss darüber, dass der Klimawandel von den Hochschullehrenden der Sozialen Arbeit als wichtig eingestuft wird. Der Klimawandel stellt in der Hochschullehre der Sozialen Arbeit ein nur wenig beachtetes Themenfeld dar. Es zeigt sich, dass bei den Hochschullehrenden viele Unsicherheiten und Unklarheiten in Bezug auf die Entwicklung der Lehre vorhanden sind. Für eine Weiterentwicklung der Lehre in der Sozialen Arbeit fehlt es bisher an Grundlagenwissen, Ressourcen sowie einem Austausch zum Thema Klimawandel. Die Ergebnisse der empirischen Untersuchungen führen gesamthaft zur Empfehlung eines verstärkten Diskurses in der Lehre der Sozialen Arbeit zum Thema Klimawandel. Als Möglichkeiten dazu wird neben einem Aufbau von themenspezifischen Netzwerken und Kooperationen, Investitionen in die Theorie- und Grundlagenbildung, ebenfalls die Förderung von disziplinübergreifenden Bestrebungen sowie eine verstärkte Partizipation der Studierenden bei der Entwicklung der Lehre vorgeschlagen.
Minisuperspace quantum cosmology in $f(Q)$ gravity
Creators: name: Bajardi, Francesco
name: Capozziello, Salvatore
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: $f(Q)$ symmetric-teleparallel gravity is considered in view of Quantum Cosmology. Specifically, we derive cosmological equations for $f(Q)$ models and then investigate the related energy conditions. In the minisuperspace formalism, the point-like $f(Q)$ Hamiltonian is taken into account. In this framework, we obtain and solve the Wheeler-De Witt equation, thus finding the Wave Function of the Universe in different cases. We show that the Hartle Criterion can be applied and classical observable universes occur.
description: 17 pages, 2 Figures. Accepted for publication in EPJC
FlavBit: A GAMBIT module for computing flavour observables and likelihoods
Creators: name: Bernlochner, Florian U.
name: Chrzaszcz, Marcin
name: Dal, Lars A.
name: Farmer, Ben
name: Jackson, Paul
name: Kvellestad, Anders
name: Mahmoudi, Farvah
name: Putze, Antje
name: Rogan, Christopher
name: Scott, Pat
name: Serra, Nicola
name: Weniger, Christoph
name: White, Martin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Flavour physics observables are excellent probes of new physics up to very high energy scales. Here we present FlavBit, the dedicated flavour physics module of the global-fitting package GAMBIT. FlavBit includes custom implementations of various likelihood routines for a wide range of flavour observables, including detailed uncertainties and correlations associated with LHCb measurements of rare, leptonic and semileptonic decays of B and D mesons, kaons and pions. It provides a generalised interface to external theory codes such as SuperIso, allowing users to calculate flavour observables in and beyond the Standard Model, and then test them in detail against all relevant experimental data. We describe FlavBit and its constituent physics in some detail, then give examples from supersymmetry and effective field theory illustrating how it can be used both as a standalone library for flavour physics, and within GAMBIT.
description: 25 pages, 2 figures, 9 tables. v2: References added
Probabilistic boundaries of finite extensions of quantum groups
Creators: name: Malacarne, Sara
name: Neshveyev, Sergey
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: Given a discrete quantum group $H$ with a finite normal quantum subgroup $G$, we show that any positive, possibly unbounded, harmonic function on $H$ with respect to an irreducible invariant random walk is $G$-invariant. This implies that, under suitable assumptions, the Poisson and Martin boundaries of $H$ coincide with those of $H/G$. A similar result is also proved in the setting of exact sequences of C$^*$-tensor categories. As an immediate application, we conclude that the boundaries of the duals of the group-theoretical easy quantum groups are classical.
description: 9 pages; v2: minor corrections
Presentation: Utilization of Waste Teak Sawdust for Adsorption of Rhodamine B
Creators: name: Wibiana Wulan Nandari
name: Tutik Muji Setyoningrum
name: Murni, Sri Wahyu
Publisher: name: Zenodo
Year: 2022

description: This material has presented on 1st International Conference on Advanced Research in Engineering and Technology. October 25, 2022
Fallabschluss in der Sozialhilfe : nachhaltige Gestaltung eines Fallabschlusses in der Sozialhilfe aufgrund beruflicher Integration
Creators: name: Metzker, Fiona
Publisher: name: ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Year: 2024
Subjects: 361: Sozialarbeit und Sozialhilfe

description: Die vorliegende Arbeit untersucht, wie Sozialdienste Fallabschlussprozesse gestalten können, damit betroffene Personen in der Lage sind, ihren Lebensunterhalt langfristig finanziell selbständig zu bestreiten. Die Fragestellung wird anhand eines qualitativen Forschungsvorgehens bearbeitet. Es wird eine Dokumentenanalyse durchgeführt mit bereits vorhandenen Dokumenten aus verschiedenen Sozialdiensten zum Thema Fallabschluss. Weitere Daten zur Bearbeitung der Fragestellung werden mittels Expert*innen-Interviews erhoben. Als Interviewpartner*innen fungieren Sozialarbeitende, welche Fallabschlüsse durchführen sowie Personen, welche sich von der Sozialhilfe ablösen konnten. In der vorliegenden Arbeit werden zudem relevante Bezüge aus Studien und der Literatur vorgestellt. Dabei werden die Themen Fallabschluss in der Sozialhilfe und berufliche Integration beleuchtet. Eine Ablösung von der Sozialhilfe in die finanzielle Selbständigkeit stellt für die betroffenen Personen einen Übergang dar. Der Forschungsstand wird deshalb mit der Theorie zu Transitionen sowie einem dazugehörigen Modell ergänzt. Aus den Ergebnissen lässt sich schliessen, dass ein Fallabschluss ein aufwendiger Prozess ist, der für alle Beteiligten vielschichtig und komplex ist. Zentrale Erkenntnisse sind, dass der Fallabschluss auf Ebene der Klient*innen in methodischer Hinsicht Verbesserungspotential aufweist. Das Transitionsmodell bietet eine geeignete Struktur, um den Fallabschluss auf Ebene der Klient*innen methodisch zu gestalten.
Subset Selection for Multiple Linear Regression via Optimization
Creators: name: Park, Young Woong
name: Klabjan, Diego
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Subset selection in multiple linear regression aims to choose a subset of candidate explanatory variables that tradeoff fitting error (explanatory power) and model complexity (number of variables selected). We build mathematical programming models for regression subset selection based on mean square and absolute errors, and minimal-redundancy-maximal-relevance criteria. The proposed models are tested using a linear-program-based branch-and-bound algorithm with tailored valid inequalities and big M values and are compared against the algorithms in the literature. For high dimensional cases, an iterative heuristic algorithm is proposed based on the mathematical programming models and a core set concept, and a randomized version of the algorithm is derived to guarantee convergence to the global optimum. From the computational experiments, we find that our models quickly find a quality solution while the rest of the time is spent to prove optimality; the iterative algorithms find solutions in a relatively short time and are competitive compared to state-of-the-art algorithms; using ad-hoc big M values is not recommended.
On the Decoherence of Primordial Gravitons
Creators: name: Ning, Sirui
name: Sou, Chon Man
name: Wang, Yi
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It is well-known that the primordial scalar curvature and tensor perturbations, $ζ$ and $γ_{ij}$, are conserved on super-horizon scales in minimal inflation models. However, their wave functional has a rapidly oscillating phase which is slow-roll unsuppressed, as can be seen either from boundary (total-derivative) terms of cosmological perturbations, or the WKB approximation of the Wheeler-DeWitt equation. Such an oscillatory phase involves gravitational non-linearity between scalar and tensor perturbations. By tracing out unobserved modes, the oscillatory phase causes faster decoherence of primordial gravitons compared to those by bulk interactions. Our results put a stronger lower bound of decoherence effect to the recent proposals probing squeezed primordial gravitons.
description: 42 pages, 3 figures, 1 table, references added, typos corrected
A hot super-Earth planet in the WASP-84 planetary system
Creators: name: Maciejewski, G.
name: Golonka, J.
name: Łoboda, W.
name: Ohlert, J.
name: Fernandez, M.
name: Aceituno, F.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Hot Jupiters have been perceived as loners devoid of planetary companions in close orbital proximity. However, recent discoveries based on space-borne precise photometry have revealed that at least some fraction of giant planets coexists with low-mass planets in compact orbital architectures. We report detecting a 1.446-day transit-like signal in the photometric time series acquired with the Transiting Exoplanet Survey Satellite (TESS) for the WASP-84 system, which is known to contain a hot Jupiter on a circular 8.5-day orbit. The planet was validated based on TESS photometry, and its signal was distilled in radial velocity measurements. The joint analysis of photometric and Doppler data resulted in a multi-planetary model of the system. With a mass of $15\, M_{\oplus}$, radius of $2\, R_{\oplus}$, and orbital distance of 0.024 au, the new planet WASP-84 c was classified as a hot super-Earth with the equilibrium temperature of 1300 K. A growing number of companions to hot Jupiters indicates that a non-negligible part of them must have formed under a quiescent scenario such as disc migration or in-situ formation.
description: Accepted for publication in MNRAS Letters, updated with additional materials to reflect the published version
Limits on light primordial black holes from high-scale leptogenesis
Creators: name: Calabrese, Roberta
name: Chianese, Marco
name: Gunn, Jacob
name: Miele, Gennaro
name: Morisi, Stefano
name: Saviano, Ninetta
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the role that the evaporation of light primordial black holes may have played in the production of the baryon asymmetry of the Universe through the high-scale leptogenesis. In particular, for mass of primordial black hole in the range [$10^6$-$10^9$] g, we find a dilution of thermally generated lepton asymmetry via entropy injection in the primordial plasma after the sphaleron freeze-out. As a consequence, we can put strong constraints on the primordial black hole parameters, showing the mutual exclusion limits between primordial black holes and high-scale leptogenesis. Remarkably, we point out an interplay between the upper bound on the initial abundance of primordial black holes and the active neutrino mass scale.
description: 11 pages, 6 figures
ความสัมพันธ์ระหว่างคุณลักษณะบุคลิกภาพห้าองค์ประกอบและการปรับตัวในการทำงานกับประสิทธิผลในการทำงานของพนักงานบริษัทเอกชนแห่งหนึ่ง
Creators: name: วิลาวัลย์ แก้วมงคล
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2565
Subjects: คุณลักษณะบุคลิกภาพห้าองค์ประกอบ
การปรับตัวในการทำงาน
ประสิทธิผลในการทำงาน

description: วารสารนวัตกรรมสังคมและเทคโนโลยีสื่อสารมวลชน, 5, 2, 51-63
Optimization of edge state velocity in the integer quantum Hall regime
Creators: name: Sahasrabudhe, Harshad
name: Novakovic, Bozidar
name: Nakamura, James
name: Fallahi, Saeed
name: Povolotskyi, Michael
name: Klimeck, Gerhard
name: Rahman, Rajib
name: Manfra, Michael J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Observation of interference in the quantum Hall regime may be hampered by a small edge state velocity due to finite phase coherence time. Therefore designing two quantum point contact (QPCs) interferometers having a high edge state velocity is desirable. Here, we present a new simulation method for realistically modeling edge states near QPCs in the integer quantum Hall effect (IQHE) regime. We calculate the filling fraction in the center of the QPC and the velocity of the edge states, and predict structures with high edge state velocity. The 3D Schrödinger equation is split into 1D and 2D parts. Quasi-1D Schrödinger and Poisson equations are solved self-consistently in the IQHE regime to obtain the potential profile near the edges, and quantum transport is used to solve for the edge state wavefunctions. The velocity of edge states is found to be $\left< E \right> / B$, where $\left< E \right>$ is the expectation value of the electric field for the edge state. Anisotropically etched trench gated heterostructures with double sided delta doping have the highest edge state velocity among the structures considered.
description: 12 pages, 11 figures
นวัตกรรมผลิตภัณฑ์และกิจกรรมพื้นฐานของห่วงโซ่คุณค่าที่ส่งผลต่อผลการดำเนินงานวิสาหกิจชุมชนที่ประกอบกิจการผลิตภัณฑ์สมุนไพรในประเทศไทย
Creators: name: ชนิกานต์ พนมอุปถัมภ์
Publisher: name: คณะนิเทศศาสตร์ มหาวิทยาลัยราชภัฏรำไพพรรณี
Year: 2565
Subjects: นวัตกรรมผลิตภัณฑ์
ห่วงโซ่คุณค่า
ผลการดำเนินงาน
วิสาหกิจชุมชน
ผลิตภัณฑ์สมุนไพร

description: วารสารนวัตกรรมสังคมและเทคโนโลยีสื่อสารมวลชน, 5, 2, 64-77
Observables and Dispersion Relations in k-Minkowski Spacetime
Creators: name: Aschieri, Paolo
name: Borowiec, Andrzej
name: Pachol, Anna
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We revisit the notion of quantum Lie algebra of symmetries of a noncommutative spacetime, its elements are shown to be the generators of infinitesimal transformations and are naturally identified with physical observables. Wave equations on noncommutative spaces are derived from a quantum Hodge star operator. This general noncommutative geometry construction is then exemplified in the case of k-Minkowski spacetime. The corresponding quantum Poincare'-Weyl Lie algebra of infinitesimal translations, rotations and dilatations is obtained. The d'Alembert wave operator coincides with the quadratic Casimir of quantum translations and it is deformed as in Deformed Special Relativity theories. Also momenta (infinitesimal quantum translations) are deformed, and correspondingly the Einstein-Planck relation and the de Broglie one. The energy-momentum relations (dispersion relations) are consequently deduced. These results complement those of the phenomenological literature on the subject.
description: 30 pages. Revised version further motivating Poincare'-Weyl (conformal) symmetry. Added explicit proof of covariance of massive scalar fields wave equation under quantum translations (eq. (76)). To appear in JHEP