cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Energetics of positron states trapped at vacancies in solids
Creators: name: Makkonen, I.
name: Puska, M. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report a computational first-principles study of positron trapping at vacancy defects in metals and semiconductors. The main emphasis is on the energetics of the trapping process including the interplay between the positron state and the defect's ionic structure and on the ensuing annihilation characteristics of the trapped state. For vacancies in covalent semiconductors the ion relaxation is a crucial part of the positron trapping process enabling the localization of the positron state. However, positron trapping does not strongly affect the characteristic features of the electronic structure, e.g., the ionization levels change only moderately. Also in the case of metal vacancies the positron-induced ion relaxation has a noticeable effect on the calculated positron lifetime and momentum distribution of annihilating electron-positron pairs.
description: Submitted to Physical Review B on 17 April 2007. Revised version submitted on 6 July 2007
A Maslov cocycle for unitary groups
Creators: name: Kramer, Linus
name: Tent, Katrin
Publisher: name: arXiv
Year: 2007
Subjects: subject: K-Theory and Homology (math.KT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 19CXX, 20JXX, 11EXX

description: We introduce a 2-cocycle for symplectic and skew-hermitian hyperbolic groups over arbitrary fields and skew fields, with values in the Witt group of hermitian forms. This cocycle has good functorial properties: it is natural under extension of scalars and stable, so it can be viewed as a universal 2-dimensional characteristic class for these groups. Over R and C, it coincides with the first Chern class.
description: To appear in Proc. London Math. Soc
Θεάματα, θύματα και θύματα της σύνθεσης για την εμπειρία του συνολικού έργου τέχνης: μια κονστρουκτιβιστική προσέγγιση
Creators: name: Γρηγοριάδου, Ευθαλία-Θάλεια Πρ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Συνολικό έργο τέχνης
Συνολικός σχεδιασμός
Συνολική σύνθεση
Κονστρουκτιβιστικό μεθοδολογικό μοντέλο
Total work of art (Gesamtkunstwerk)
Total design
Total synthesis
Constructivist paradigm

description: Σύμφωνα με την βαγκνερική παράδοση το Gesamtkunstwerk αναφέρεται στη δημιουργική συνολική σύνθεση των τεχνών και των διαφόρων ειδών εμπειρογνωμοσύνης. Μέσα από μια ιστορική αναδρομή αναδεικνύεται ότι το Gesamtkunstwerk εφαρμόστηκε στα πεδία της τέχνης και του θεάτρου, καθώς και απασχόλησε περαιτέρω τους επιστημονικούς τομείς της αρχιτεκτονικής, του design, της φιλοσοφίας, της θεωρίας της τεχνολογίας. Από το Ρομαντισμό και τα ιδεώδη της ενοποιητικής αρμονίας, τη μεταμοντέρνα εποχή και τις ριζοσπαστικές πεποιθήσεις του κατακερματισμού, έως και τη σύγχρονη χρήση του υπολογιστή ως μετα-μέσο συνολικής σύνθεσης, η έννοια του συνολικού έργου τέχνης παρουσιάζεται κατά καιρούς να αντανακλά τους στόχους της κοινωνίας και τις καλλιτεχνικές προσδοκίες. Ωστόσο, στη μοντέρνα εποχή των αρχών του 20ου αι. η εν λόγω έννοια συχνά συσχετίζεται με ολοκληρωτικές ιδεολογίες που προωθούν εθνικιστικά ιδεώδη και, ως εκ τούτου, ενισχύεται η ιστορική της απομόνωση. Χρησιμοποιώντας τον κονστρουκτιβισμό ως βασικό μεθοδολογικό υπόδειγμα, η έρευνα αυτή αναμένεται να συμβάλει στην εμφάνιση νέων τρόπων κατανόησης της ιστορίας, των σύγχρονων εκφράσεων, καθώς και του μέλλοντος του Gesamtkunstwerk σε πρακτικές του συλλογικού συνολικού έργου.
description: According to the Wagnerian tradition Gesamtkunstwerk refers to the creative all-comprehensive union of the arts and various types of expertise. In a historical literature review Gesamtkunstwerk emerges as having been implemented in the fields of art and theatre as well as further concerning the disciplines of architecture, design, philosophy, technology theory. From Romanticism and the ideals of unifying harmony, to Postmodernism and its radical principles of fragmentation, up until the contemporary use of the computer as a meta-medium of synthesis within a single interface, the concept of the total artwork seems to occasionally reflect society’s goals and artistic aspirations; yet, in modern times it has frequently been associated with totalitarianism which advances nationalistic ideals, thus adding to its historical seclusion. By employing Constructivism as the key methodological paradigm, this research expects to contribute to the emergence of new challenging ways of understanding the history, contemporary expressions as well as the future of Gesamtkunstwerk in practices of collaborative work.
Micromagnetic modelling of magnetic domain walls in curved cylindrical nanotubes and nanowires
Creators: name: Skoric, L.
name: Donnelly, C.
name: Abert, C.
name: Hierro-Rodriguez, A.
name: Suess, D.
name: Fernández-Pacheco, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We investigate the effect of curvature on the energy and stability of domain wall configurations in curved cylindrical nanotubes and nanowires. We use micromagnetic simulations to calculate the phase diagram for the transverse wall (TW) and vortex wall (VW) states in tubes, finding the ground state configuration and the metastability region where both types of walls can exist. The introduction of curvature shifts the range for which the TW is the ground state domain wall to higher diameters, and increases the range of metastability. We interpret this behavior to be primarily due to the curvature-induced effective Dzyaloshinskii-Moriya term in the exchange energy. Furthermore, we demonstrate qualitatively the same behavior in solid cylindrical nanowires. Comparing both tubes and wires, we observe how while in tubes curvature tends to suppress the transformation from the TW to VW, in wires it promotes the transformation of the VW containing the Bloch point into the TW. These findings have important implications in the fundamental understanding of domain walls in 3D geometries, and the design of future domain wall devices.
การวิเคราะห์เส้นทางความสัมพันธ์การจัดการธุรกิจชุมชนของนิคมเศรษฐกิจพอเพียง
Creators: name: วิโรจน์  พรหมสุด
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2555
Subjects: ธุรกิจชุมชน, ปรัชญาเศรษฐกิจพอเพียง, วิสาหกิจชุมชน, นิคมเศรษฐกิจพอเพียง

description: 1, 5, วารสารเทคโนโลยีภาคใต้
Do gamma-ray burst measurements provide a useful test of cosmological models?
Creators: name: Khadka, Narayan
name: Luongo, Orlando
name: Muccino, Marco
name: Ratra, Bharat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: We study eight different gamma-ray burst (GRB) data sets to examine whether current GRB measurements -- that probe a largely unexplored part of cosmological redshift ($z$) space -- can be used to reliably constrain cosmological model parameters. We use three Amati-correlation samples and five Combo-correlation samples to simultaneously derive correlation and cosmological model parameter constraints. The intrinsic dispersion of each GRB data set is taken as a goodness measurement. We examine the consistency between the cosmological bounds from GRBs with those determined from better-established cosmological probes, such as baryonic acoustic oscillation (BAO) and Hubble parameter $H(z)$ measurements. We use the Markov chain Monte Carlo method implemented in \textsc{MontePython} to find best-fit correlation and cosmological parameters, in six different cosmological models, for the eight GRB samples, alone or in conjunction with BAO and $H(z)$ data. For the Amati correlation case, we compile a data set of 118 bursts, the A118 sample, which is the largest -- about half of the total Amati-correlation GRBs -- current collection of GRBs suitable for constraining cosmological parameters. This updated GRB compilation has the smallest intrinsic dispersion of the three Amati-correlation GRB data sets we examined. We are unable to define a collection of reliable bursts for current Combo-correlation GRB data. Cosmological constraints determined from the A118 sample are consistent with -- but significantly weaker than -- those from BAO and $H(z)$ data. They also are consistent with the spatially-flat $Λ$CDM model as well as with dynamical dark energy models and non-spatially-flat models. Since GRBs probe a largely unexplored region of $z$, it is well worth acquiring more and better-quality burst data which will give a more definitive answer to the question of the title.
description: 48 pages, 12 figures, GRB data are given
ตัวแบบเทคโนโลยีสารสนเทศสำหรับการบริหารลูกค้าสัมพันธ์
Creators: name: สมพงษ์  ยิ่งเมือง
name: วรชัย  เยาวปาณี
name: วีระชัย  คอนจอหอ; ปานจิตร์  หลงประดิษฐ์
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2556
Subjects: ตัวแบบเทคโนโลยีสารสนเทศ, การบริหารลูกค้าสัมพันธ์, ตัวแบบการพัฒนาคุณภาพ

description: 1, 6, วารสารเทคโนโลยีภาคใต้
การพัฒนาบทเรียนคอมพิวเตอร์มัลติมีเดีย กลุ่มสาระการเรียนรู้วิทยาศาสตร์ เรื่อง อาหารกับการดำรงชีวิตสำหรับนักเรียนชั้นมัธยมศึกษาปีที่ 2
Creators: name: กรวิทย์  จันทร์พูล
name: พฤฒิพงษ์  เล็กศิริรัตน์ และ เมธี  ดิสวัสดิ์
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2557
Subjects: บทเรียนคอมพิวเตอร์มัลติมีเดีย

description: 2, 7, วารสารเทคโนโลยีภาคใต้
การประเมินศูนย์พัฒนาเด็กเล็กขององค์การบริหารส่วนตำบลคลองอู่ตะเภา อำเภอหาดใหญ่ จังหวัดสงขลา
Creators: name: บุศรา บุตรโคตร
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2557
Subjects: การประเมิน, ศูนย์พัฒนาเด็กเล็ก, มาตรฐานการดำเนินงานศูนย์พัฒนาเด็กเล็ก

description: 2, 7, วารสารเทคโนโลยีภาคใต้
การพัฒนาหนังสืออิเล็กทรอนิกส์แบบสื่อประสม กลุ่มสาระการเรียนรู้สังคมศึกษา ศาสนาและวัฒนธรรม เรื่อง หลักธรรมทางพระพุทธศาสนา สำหรับนักเรียนชั้นมัธยมศึกษาปีที่ 2
Creators: name: วิลาวัณย์  พินสุวรรณ
name: พฤฒิพงษ์  เล็กศิริรัตน์ และ ชัยลิขิต  สร้อยเพชรเกษม
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2557
Subjects: การพัฒนาหนังสืออิเล็กทรอนิกส์แบบสื่อประสม

description: 1, 7, วารสารเทคโนโลยีภาคใต้
ระบบการดูแลช่วยเหลือนักเรียนของโรงเรียนเอกชน สังกัดสำนักงานเขตพื้นที่การศึกษาประถมศึกษานครศรีธรรมราช เขต 3
Creators: name: จุฑากิจ นวลมังสอ
Publisher: name: วิทยาลัยเทคโนโลยีภาคใต้
Year: 2557
Subjects: ระบบการดูแลช่วยเหลือนักเรียน

description: 2, 7, วารสารเทคโนโลยีภาคใต้
Convolutional neural network identification of galaxy post-mergers in UNIONS using IllustrisTNG
Creators: name: Bickley, Robert W.
name: Bottrell, Connor
name: Hani, Maan H.
name: Ellison, Sara L.
name: Teimoorinia, Hossen
name: Yi, Kwang Moo
name: Wilkinson, Scott
name: Gwyn, Stephen
name: Hudson, Michael J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Canada-France Imaging Survey (CFIS) will consist of deep, high-resolution r-band imaging over ~5000 square degrees of the sky, representing a first-rate opportunity to identify recently-merged galaxies. Due to the large number of galaxies in CFIS, we investigate the use of a convolutional neural network (CNN) for automated merger classification. Training samples of post-merger and isolated galaxy images are generated from the IllustrisTNG simulation processed with the observational realism code RealSim. The CNN's overall classification accuracy is 88 percent, remaining stable over a wide range of intrinsic and environmental parameters. We generate a mock galaxy survey from IllustrisTNG in order to explore the expected purity of post-merger samples identified by the CNN. Despite the CNN's good performance in training, the intrinsic rarity of post-mergers leads to a sample that is only ~6 percent pure when the default decision threshold is used. We investigate trade-offs in purity and completeness with a variable decision threshold and find that we recover the statistical distribution of merger-induced star formation rate enhancements. Finally, the performance of the CNN is compared with both traditional automated methods and human classifiers. The CNN is shown to outperform Gini-M20 and asymmetry methods by an order of magnitude in post-merger sample purity on the mock survey data. Although the CNN outperforms the human classifiers on sample completeness, the purity of the post-merger sample identified by humans is frequently higher, indicating that a hybrid approach to classifications may be an effective solution to merger classifications in large surveys.
description: 21 pages, 19 figures, 2 tables, Accepted for publication in MNRAS
Two-dimensional black holes in the limiting curvature theory of gravity
Creators: name: Frolov, Valeri P.
name: Zelnikov, Andrei
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we discuss modified gravity models in which growth of the curvature is dynamically restricted. To illustrate interesting features of such models we consider a modification of two-dimensional dilaton gravity theory which satisfies the limiting curvature condition. We show that such a model describes two-dimensional black holes which contain the de Sitter-like core instead of the singularity of the original non-modified theory. In the second part of the paper we study Vaidya type solutions of the model of the limiting curvature theory of gravity and used them to analyse properties of black holes which are created by the collapse of null fluid. We also apply these solutions to study interesting features of a black hole evaporation.
description: 35 pages, 5 figures, references added, misprints corrected
Nanotube heat conductors under tensile strain: Reducing the three-phonon scattering strength of acoustic phonons
Creators: name: Bruns, Daniel
name: Nojeh, Alireza
name: Phani, A. Srikantha
name: Rottler, Jörg
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Acoustic phonons play a special role in lattice heat transport, and confining these low-energy modes in low-dimensional materials may enable nontrivial transport phenomena. By applying lowest-order anharmonic perturbation theory to an atomistic model of a carbon nanotube, we investigate numerically and analytically the spectrum of three-phonon scattering channels in which at least one phonon is of low energy. Our calculations show that acoustic longitudinal (LA), flexural (FA), and twisting (TW) modes in nanotubes exhibit a distinct dissipative behavior in the long-wavelength limit, $|k| \rightarrow 0$, which manifests itself in scattering rates that scale as $Γ_{\rm{LA}}\sim |k|^{-1/2}$, $Γ_{\rm{FA}}\sim k^0$, and $Γ_{\rm{TW}}\sim |k|^{1/2}$. These scaling relations are a consequence of the harmonic lattice approximation and critically depend on the condition that tubes are free of mechanical strain. In this regard, we show that small amounts of tensile lattice strain $ε$ reduce the strength of anharmonic scattering, resulting in strain-modulated rates that, in the long-wavelength limit, obey $Γ\sim ε^{r} |k|^{s}$ with $r\leq 0$ and $s\geq 1$, irrespectively of acoustic mode polarization. Under the single-mode relaxation time approximation of the linearized Peierls-Boltzmann equation (PBE), the long-tube limit of lattice thermal conductivity in stress-free and stretched tube configurations can be unambiguously characterized. Going beyond relaxation time approximations, analytical results obtained in the present study may help to benchmark numerical routines which aim at deriving the thermal conductivity of nanotubes from an exact solution of the PBE.
Dynamic Model for Query-Document Expansion towards Improving Retrieval Relevance
Creators: name: Olufade, Onifade
name: Abiola, Arise
name: Chisom, Ogboo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Getting relevant information from search engines has been the heart of research works in information retrieval. Query expansion is a retrieval technique that has been studied and proved to yield positive results in relevance. Users are required to express their queries as a shortlist of words, sentences, or questions. With this short format, a huge amount of information is lost in the process of translating the information need from the actual query size since the user cannot convey all his thoughts in a few words. This mostly leads to poor query representation which contributes to undesired retrieval effectiveness. This loss of information has made the study of query expansion technique a strong area of study. This research work focuses on two methods of retrieval for both tweet-length queries and sentence-length queries. Two algorithms have been proposed and the implementation is expected to produce a better relevance retrieval model than most state-the-art relevance models.
Spin Transport in Quantum Spin-Orbital Liquids
Creators: name: Zhuang, Zekun
name: Marston, J. B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Quantum spin-orbital liquids (QSOLs) are a novel phase of matter, similar to quantum spin liquids, with quantum fluctuations in both spin and orbital degrees of freedom. We use non-equilibrium Green's function theory to study out-of-equilibrium spin transport in an exactly solvable QSOL model put forward by Yao and Lee. We find that the spin transport problem can be mapped to that of a free fermion problem with effective fermionic baths that have rapidly varying density of states. In the gapless phase, the spin current $I_s-V_s$ relation is thus highly nonlinear, while in the chiral gapped phase, the spin current conductance is quantized to be $1/2π$ provided that the contacts are sufficiently wide. The quantized conductance is a signature of the topological nature of the chiral gapped QSOL.
Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
Creators: name: Krishnan, Chethan
name: Mohayaee, Roya
name: Colgáin, Eoin Ó
name: Sheikh-Jabbari, M. M.
name: Yin, Lu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: The tension between early and late Universe probes of the Hubble constant has motivated various new FLRW cosmologies. Here, we reanalyse the Hubble tension with a recent age of the Universe constraint. This allows us to restrict attention to matter and a dark energy sector that we treat without assuming a specific model. Assuming analyticity of the Hubble parameter $H(z)$, and a generic low redshift modification to flat $Λ$CDM, we find that low redshift data ($z \lesssim 2.5$) and well-motivated priors only permit a dark energy sector close to the cosmological constant $Λ$. This restriction rules out late Universe modifications within FLRW. We show that early Universe physics that alters the sound horizon can yield an upper limit of $H_0 \sim 71 \pm 1$ km/s/Mpc. Since various local determinations may be converging to $H_0 \sim 73$ km/s/Mpc, a breakdown of the FLRW framework is a plausible resolution. We outline how future data, in particular strongly lensed quasar data, could also provide further confirmations of such a resolution.
description: v1 10 pages, comments welcome, especially on appendix D & Figure 4; v2, typos corrected, Figure 4 improved, observations strengthened; v3 references added, matches version published as invited contribution to CQG "Focus Issue on the Hubble Constant Tension"
Spin-$0$ Mott insulator to metal to spin-$1$ Mott insulator transition in the single-orbital Hubbard model on the decorated honeycomb lattice
Creators: name: Nourse, H. L.
name: McKenzie, Ross H.
name: Powell, B. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the interplay of strong electron correlations and intra-triangle spin exchange at two-thirds filling of the single-orbital Hubbard model on the decorated honeycomb lattice using rotationally invariant slave bosons. We find that the spin exchange tunes between a spin-$1$ Mott insulator, a metal, and a spin-$0$ Mott insulator when the exchange is antiferromagnetic. The Mott insulators occur from effective intra-triangle multi-orbital interactions and are adiabatically connected to the ground state of an isolated triangle. An antiferromagnetic spin exchange, as determined by the Goodenough-Kanamori rules, may occur in coordination polymers from kinetic exchange via the ligands. We characterize the magnetism in the regime where spin-triplets dominate. For small $U$ a spin-$1$ Slater insulator occurs with antiferromagnetic order between triangles. Magnetism in the spin-$1$ Mott insulator is described by a spin-$1$ Heisenberg model on a honeycomb lattice, whose ground state is Néel ordered.
World War III Analysis using Signed Social Networks
Creators: name: Chowdhury, Ranjana Roy
name: Gupta, Shivam
name: Chede, Sravanthi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: In the recent period of time with a lot of social platforms emerging, the relationships among various units can be framed with respect to either positive, negative or no relation. These units can be individuals, countries or others that form the basic structural component of a signed network. These signed networks picture a dynamic characteristic of the graph so formed allowing only few combinations of signs that brings the structural balance theorem in picture. Structural balance theory affirms that signed social networks tend to be organized so as to avoid conflictual situations, corresponding to cycles of unstable relations. The aim of structural balance in networks is to find proper partitions of nodes that guarantee equilibrium in the system allowing only few combination triangles with signed edges to be permitted in graph. Most of the works in this field of networking have either explained the importance of signed graph or have applied the balance theorem and tried to solve problems. Following the recent time trends with each nation emerging to be superior and competing to be the best, the probable doubt of happening of WW-III(World War-III) comes into every individuals mind. Nevertheless, our paper aims at answering some of the interesting questions on World War-III. In this project we have worked with the creation of a signed graph picturing the World War-III participating countries as nodes and have predicted the best possible coalition of countries that will be formed during war. Also, we have visually depicted the number of communities that will be formed in this war and the participating countries in each communities.
description: 7 tables 14 figures 14 pages
Model reduction in acoustic inversion by artificial neural network
Creators: name: Koponen, Janne
name: Lähivaara, Timo
name: Kaipio, Jari
name: Vauhkonen, Marko
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: Computational Physics (physics.comp-ph)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In ultrasound tomography, the speed of sound inside an object is estimated based on acoustic measurements carried out by sensors surrounding the object. An accurate forward model is a prominent factor for high-quality image reconstruction, but it can make computations far too time-consuming in many applications. Using approximate forward models, it is possible to speed up the computations, but the quality of the reconstruction may have to be compromised. In this paper, a neural network -based approach is proposed, that can compensate for modeling errors caused by the approximate forward models. The approach is tested with various different imaging scenarios in a simulated two-dimensional domain. The results show that with fairly small training datasets, the proposed approach can be utilized to approximate the modelling errors, and to significantly improve the image reconstruction quality in ultrasound tomography, compared to commonly used inversion algorithms.
Quantum speed-up in collisional battery charging
Creators: name: Seah, Stella
name: Perarnau-Llobet, Martí
name: Haack, Géraldine
name: Brunner, Nicolas
name: Nimmrichter, Stefan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a collision model for the charging of a quantum battery by identical nonequilibrium qubit units. When the units are prepared in a mixture of energy eigenstates, the energy gain in the battery can be described by a classical random walk, where both average energy and variance grow linearly with time. Conversely, when the qubits contain quantum coherence, interference effects buildup in the battery and lead to a faster spreading of the energy distribution, reminiscent of a quantum random walk. This can be exploited for faster and more efficient charging of a battery initialized in the ground state. Specifically, we show that coherent protocols can yield higher charging power than any possible incoherent strategy, demonstrating a quantum speed-up at the level of a single battery. Finally, we characterize the amount of extractable work from the battery through the notion of ergotropy.
description: 4 pages, 5 figures
Complexity and the Big Bang
Creators: name: Nicolai, Hermann
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: After a brief review of current scenarios for the resolution and/or avoidance of the Big Bang, an alternative hypothesis is put forward implying an infinite increase in complexity towards the initial singularity. This may result in an effective non-calculability which would present an obstruction to actually reaching the beginning of time. This proposal is motivated by the appearance of certain infinite-dimensional duality symmetries of indefinite Kac--Moody type in attempts to unify gravity with the fundamental matter interactions, and deeply rooted in properties of Einstein's theory.
description: Revised version: minor additions and clarifications; references added
A Search for Satellite Galaxies of Nearby Star-Forming Galaxies with Resolved Stars in LBT-SONG
Creators: name: Garling, Christopher T.
name: Peter, Annika H. G.
name: Kochanek, Christopher S.
name: Sand, David J.
name: Crnojević, Denija
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present results from a resolved stellar population search for dwarf satellite galaxies of six nearby (D $<5$ Mpc), sub-Milky-Way mass hosts using deep ($m\sim27$ mag) optical imaging from the Large Binocular Telescope. We perform image simulations to quantify our detection efficiency for dwarfs over a large range in luminosity and size, and develop a fast catalog-based emulator that includes a treatment of unresolved photometric blending. We discover no new dwarf satellites, but we recover two previously known dwarfs (DDO 113 and LV J1228+4358) with $M_{\text{V}}
description: 14 pages, 10 figures. Accepted to MNRAS. Comments welcomed
Conformal transformations of conservation equations in spin hydrodynamics
Creators: name: Singh, Rajeev
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study and analyse the conformal transformations of different conservation laws in the spin hydrodynamics framework.
description: 6 pages
Structural properties of additive binary hard-sphere mixtures. II. Asymptotic behavior and structural crossovers
Creators: name: Pieprzyk, Sławomir
name: Yuste, Santos B.
name: Santos, Andrés
name: de Haro, Mariano López
name: Brańka, Arkadiusz C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The structural properties of additive binary hard-sphere mixtures are addressed as a follow-up of a previous paper [S. Pieprzyk et al., Phys. Rev. E 101, 012117 (2020)]. The so-called rational-function approximation method and an approach combining accurate molecular dynamics simulation data, the pole structure representation of the total correlation functions, and the Ornstein-Zernike equation are considered. The density, composition, and size-ratio dependencies of the leading poles of the Fourier transforms of the total correlation functions $h_{ij} (r)$ of such mixtures are presented, those poles accounting for the asymptotic decay of $h_{ij} (r)$ for large $r$. Structural crossovers, in which the asymptotic wavelength of the oscillations of the total correlation functions changes discontinuously, are investigated. The behavior of the structural crossover lines as the size ratio and densities of the two species are changed is also discussed.
description: 15 pages, 12 figures
Digestive Characteristics of Dogs Fed a Dry Food Enhanced with Additional Beet Pulp
Creators: name: Beynen, Anton C.
Publisher: name: คณะเทคโนโลยีการเกษตร  มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2017
Subjects: Dog
Diet, Beet pulp
Digestion
Feces

description: วารสารเกษตรพระวรุณ, 14, 2, 295-301
Neutrino masses in the Standard Model effective field theory
Creators: name: Chala, Mikael
name: Titov, Arsenii
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the leading-logarithmic correction to the neutrino mass matrix in the Standard Model effective field theory (SMEFT) to dimension seven. In the limit of negligible lepton and down-type quark Yukawa couplings, it receives contributions from the Weinberg dimension-five operator as well as from 11 dimension-six and five dimension-seven independent interactions. Two of the main implications we derive from this result are the following. First, we find dimension-seven operators which, despite violating lepton number, do not renormalise neutrino masses at one loop. And second, we demonstrate that the presence of dimension-six operators around the TeV scale can modify the Standard Model prediction by up to $\mathcal{O}(50\,\%)$. Our result comprises also one step forward towards the renormalisation of the SMEFT to order $v^3/Λ^3$.
description: 8 pages, 3 figures, 3 tables; several comments and references added; typos corrected; matches version published in PRD
TARGETED DRUG DELIVERY: ADDRESSING SEX DIFFERENCES IN CLINICAL ENVIRONMENTS
Creators: name: Ntina, Georgia
name: Mavromanolaki, Eirini
name: Pinto, Maria
name: Moreira, Rosa
name: Stivaktakis, Polychronis
name: Thrapsanioti, Lydia-Nefeli
name: Sivakumaran, Derick
name: Landers, Fabian
name: Vliora, Maria
Publisher: name: Zenodo
Year: 2024

description: Why sex makes a difference in health research? Genetic differences between males and females significantly influence disease prevalence and treatment responses. Sex-specific data is needed to provide optimal and personalized care.
Infrared Divergences and the Eikonal Exponentiation
Creators: name: Heissenberg, Carlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The aim of this note is to explore the interplay between the eikonal resummation in impact-parameter space and the exponentiation of infrared divergences in momentum space for gravity amplitudes describing collisions of massive objects. The eikonal governs the classical dynamics relevant to the two-body problem, and its infrared properties are directly linked to the zero-frequency limit of the gravitational wave emission spectrum and to radiation-reaction effects. Combining eikonal and infrared exponentiations it is possible to derive these properties at a given loop order starting from lower-loop data. This is illustrated explicitly in $\mathcal{N}=8$ supergravity and in general relativity by deriving the divergent part of the two-loop eikonal from tree-level and one-loop elastic amplitudes.
description: 22 pages, 3 figures. v2: References updated, published in Phys. Rev. D
Difficulties in reconciling non-negligible differences between the local and cosmological values of the gravitational coupling in extended Brans-Dicke theories
Creators: name: Gómez-Valent, Adrià
name: Puttasiddappa, Prajwal Hassan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recent studies by Solà Peracaula, Gómez-Valent, de Cruz Pérez and Moreno-Pulido (2019,2020) have pointed out the intriguing possibility that Brans-Dicke cosmology with constant vacuum energy density (BD-$Λ$CDM) may be able to alleviate the $H_0$ and $σ_8$ tensions that are found in the framework of the concordance cosmological model (GR-$Λ$CDM). The fitting analyses presented in these works indicate a preference for values of the effective gravitational coupling appearing in the Friedmann equation, $G$, about $4-9\%$ larger than Newton's constant (as measured on Earth), and mildy evolving with the expansion of the universe. The signal reaches the $\sim 3.5σ$ c.l. when the prior on $H_0$ from SH0ES and the angular diameter distances to strong gravitationally lensed quasars measured by H0LICOW are considered, and the $\sim 3σ$ c.l. when only the former is included. Thus, the improvement in the description of the cosmological datasets relies on the existence of a mechanism capable of screening the modified gravity effects at those scales where deviations from standard General Relativity (GR) are highly constrained, as in the Solar System. In this paper we explore several extensions of BD-$Λ$CDM that can leave the cosmological evolution basically unaltered at the background and linear perturbations level, while being able to screen the Brans-Dicke effects inside the regions of interest, leading to standard GR. We search for weak-field solutions around spherical static massive objects with no internal pressure and show that, unfortunately, these mechanisms can only explain very tiny departures of the effective cosmological gravitational coupling from the one measured locally. This might hinder the ability of BD-$Λ$CDM to alleviate the cosmological tensions.
description: Accepted for publication in JCAP. 22 pages and 3 figures. It contains some additional comments and references
The continuous wavelet derived by smoothing function and its application in cosmology
Creators: name: Wang, Yun
name: He, Ping
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The wavelet analysis technique is a powerful tool and is widely used in broad disciplines of engineering, technology, and sciences. In this work, we present a novel scheme of constructing continuous wavelet functions, in which the wavelet functions are obtained by taking the first derivative of smoothing functions with respect to the scale parameter. Due to this wavelet constructing scheme, the inverse transforms are only one-dimensional integrations with respect to the scale parameter, and hence the continuous wavelet transforms constructed in this way are more ready to use than the usual scheme. We then apply the Gaussian-derived wavelet constructed by our scheme to computations of the density power spectrum for dark matter, the velocity power spectrum and the kinetic energy spectrum for baryonic fluid. These computations exhibit the convenience and strength of the continuous wavelet transforms. The transforms are very easy to perform, and we believe that the simplicity of our wavelet scheme will make continuous wavelet transforms very useful in practice.
description: 9 Pages, 4 Figures, comments welcome
Fibrational Initial Algebra-Final Coalgebra Coincidence over Initial Algebras: Turning Verification Witnesses Upside Down
Creators: name: Kori, Mayuko
name: Hasuo, Ichiro
name: Katsumata, Shin-ya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: The coincidence between initial algebras (IAs) and final coalgebras (FCs) is a phenomenon that underpins various important results in theoretical computer science. In this paper, we identify a general fibrational condition for the IA-FC coincidence, namely in the fiber over an initial algebra in the base category. Identifying (co)algebras in a fiber as (co)inductive predicates, our fibrational IA-FC coincidence allows one to use coinductive witnesses (such as invariants) for verifying inductive properties (such as liveness). Our general fibrational theory features the technical condition of stability of chain colimits; we extend the framework to the presence of a monadic effect, too, restricting to fibrations of complete lattice-valued predicates. Practical benefits of our categorical theory are exemplified by new "upside-down" witness notions for three verification problems: probabilistic liveness, and acceptance and model-checking with respect to bottom-up tree automata.
description: 38 pages
Orbital and stellar parameters for 2M06464003+0109157: a double-lined eclipsing binary of spotted, sub-solar twins
Creators: name: Miller, Annaliese
name: Kounkel, Marina
name: Boggio, Chase
name: Covey, Kevin
name: Price-Whelan, Adrian M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We calculated physical and orbital properties for 2M06464003+0109157, a 1.06 day eclipsing double lined spectroscopic binary. We modelled the system's ASAS-SN and TESS light curves, measuring the system's inclination and radii of each component. Extracting radial velocities for each component from 6 SDSS/APOGEE spectra, we measured the system's mass ratio and performed a full orbital fit. Our analysis indicates that 2M06464003+0109157 has components with nearly equal masses ($m_1/m_2 =0.99 \pm 0.01$; $M_1{_,}{_2} = 0.57 \pm 0.015$ M$_\odot$) and comparable radii ($R_1 = 0.66 \pm 0.05$ R$_\odot$, $R_2 = 0.57 \pm 0.06$ R$_\odot$). The solution required two star spots to incorporate the out of eclipse variation that is seen in the light curve. We report our full characterization of this system, and prospects for similar analyses using survey data to measure precise physical and orbital properties for EBs.
description: 11 pages, 6 figures, accepted for publication to PASP
Design and construction of Xenoscope -- a full-scale vertical demonstrator for the DARWIN observatory
Creators: name: Baudis, L.
name: Biondi, Y.
name: Galloway, M.
name: Girard, F.
name: Manfredini, A.
name: McFadden, N.
name: Peres, R.
name: Sanchez-Lucas, P.
name: Thieme, K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The DARWIN observatory is a proposed next-generation experiment to search for particle dark matter and other rare interactions. It will operate a 50 t liquid xenon detector, with 40 t in the time projection chamber (TPC). To inform the final detector design and technical choices, a series of technological questions must first be addressed. Here we describe a full-scale demonstrator in the vertical dimension, Xenoscope, with the main goal of achieving electron drift over a 2.6 m distance, which is the scale of the DARWIN TPC. We have designed and constructed the facility infrastructure, including the cryostat, cryogenic and purification systems, the xenon storage and recuperation system, as well as the slow control system. We have also designed a xenon purity monitor and the TPC, with the fabrication of the former nearly complete. In a first commissioning run of the facility without an inner detector, we demonstrated the nominal operational reach of Xenoscope and benchmarked the components of the cryogenic and slow control systems, demonstrating reliable and continuous operation of all subsystems over 40 days. The infrastructure is thus ready for the integration of the purity monitor, followed by the TPC. Further applications of the facility include R&D on the high voltage feedthrough for DARWIN, measurements of electron cloud diffusion, as well as measurements of optical properties of liquid xenon. In the future, Xenoscope will be available as a test platform for the DARWIN collaboration to characterise new detector technologies.
description: 38 pages, 23 figures
Addressing Hate Speech with Data Science: An Overview from Computer Science Perspective
Creators: name: Srba, Ivan
name: Lenzini, Gabriele
name: Pikuliak, Matus
name: Pecar, Samuel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: From a computer science perspective, addressing on-line hate speech is a challenging task that is attracting the attention of both industry (mainly social media platform owners) and academia. In this chapter, we provide an overview of state-of-the-art data-science approaches - how they define hate speech, which tasks they solve to mitigate the phenomenon, and how they address these tasks. We limit our investigation mostly to (semi-)automatic detection of hate speech, which is the task that the majority of existing computer science works focus on. Finally, we summarize the challenges and the open problems in the current data-science research and the future directions in this field. Our aim is to prepare an easily understandable report, capable to promote the multidisciplinary character of hate speech research. Researchers from other domains (e.g., psychology and sociology) can thus take advantage of the knowledge achieved in the computer science domain but also contribute back and help improve how computer science is addressing that urgent and socially relevant issue which is the prevalence of hate speech in social media.
Security Practitioners in Context: Their Activities and Collaborative Interactions
Creators: name: Werlinger, Rodrigo
name: Hawkey, Kirstie
name: Beznosov, Konstantin
Publisher: name: Zenodo
Year: 2008
Subjects: HOT Admin
Security Tools
Usable Security
Qualitative Analysis

description: This study develops the context of interactions of IT security practitioners. Preliminary qualitative analysis of 22 interviews (to date) and participatory observation has identified eight different types of activities that require interactions between security practitioners and different stakeholders. Our analysis shows that the tools used by our participants do not provide sufficient support for their complex security tasks, including the interactions with other stakeholders. We provide recommendations to improve tool support for security practitioners.
Unitarity constraints on meson electroproduction at backward angles
Creators: name: Laget, J. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: At large virtuality $Q^2$, the coupling to the $ρ$ meson production channels provides us with a natural explanation of the surprisingly large cross section of the $ω$, as well as the $π^+$, meson electroproduction recently measured at backward angles, without destroying the good agreement between the Regge pole model and the data at the real photon point. Together with elastic re-scattering of the outgoing meson it also provides us with a way to explain why the node, that appears at $u\sim -0.15$ GeV$^2$ at the real photon point, disappears at moderate virtuality $Q^2$. Predictions are given for the electroproduction of the $π^0$ meson.
description: 14 pages, 19 figures. Version in press in Phys. Rev. C. A few slips corrected. Figure 11 frame customized References 10 and 14 corrected
Investigation into the foundations of the track-event theory of cell survival and the radiation action model based on nanodosimetry
Creators: name: Ngcezu, Sonwabile Arthur
name: Rabus, Hans
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: FOS: Physical sciences

description: This work aims at carving out more clearly the basic assumptions behind the "track-event theory" (TET) and its derivate radiation action model based on nanodosimetry (RAMN) by clearly distinguishing between effects of tracks at the cellular level and the induction of lesions in subcellular targets. It is demonstrated that the model assumptions of Poisson distribution and statistical independence of the frequency of single and clustered DNA lesions are dispensable for multi-event distributions, because they follow from the Poisson distribution of the number of tracks affecting the considered target volume. It is also shown that making these assumptions for the single-event distributions of the number of lethal and sublethal lesions within a cell would lead to an essentially exponential dose dependence of survival for practically relevant values of the absorbed dose. Furthermore, it is elucidated that the model equation used in the literature for consideration of repair within the TET is based on the assumption that DNA lesions induced by different tracks are repaired independently and that the model equation is presumably inconsistent with the model assumptions and requires an additional model parameter. Furthermore, the methodology for deriving model parameters from nanodosimetric properties of particle track structure is critically assessed. Based on data from proton track simulations it is shown that the assumption of statistically independent targets leads to a prediction of negligible frequency of clustered DNA damage. An approach is outlined how track structure could be considered in determining the model parameters, and the implications for TET and RAMN are discussed.
description: Accepted version of the manuscript including supplements