cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Star clusters in M33: updated UBVRI photometry, ages, metallicities, and masses
Creators: name: Fan, Zhou
name: de Grijs, Richard
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The photometric characterization of M33 star clusters is far from complete. In this paper, we present homogeneous $UBVRI$ photometry of 708 star clusters and cluster candidates in M33 based on archival images from the Local Group Galaxies Survey, which covers 0.8 deg$^2$ along the galaxy's major axis. Our photometry includes 387, 563, 616, 580, and 478 objects in the $UBVRI$ bands, respectively, of which 276, 405, 430, 457, and 363 do not have previously published $UBVRI$ photometry. Our photometry is consistent with previous measurements (where available) in all filters. We adopted Sloan Digital Sky Survey $ugriz$ photometry for complementary purposes, as well as Two Micron All-Sky Survey near-infrared $JHK$ photometry where available. We fitted the spectral-energy distributions of 671 star clusters and candidates to derive their ages, metallicities, and masses based on the updated {\sc parsec} simple stellar populations synthesis models. The results of our $χ^2$ minimization routines show that only 205 of the 671 clusters ($31\%$) are older than 2 Gyr, which represents a much smaller fraction of the cluster population than that in M31 ($56\%$), suggesting that M33 is dominated by young star clusters ($<1$ Gyr). We investigate the mass distributions of the star clusters---both open and globular clusters---in M33, M31, the Milky Way, and the Large Magellanic Cloud. Their mean values are $\log(M_{\rm cl}/M_{\odot})=4.25$, 5.43, 2.72, and 4.18, respectively. The fraction of open to globular clusters is highest in the Milky Way and lowest in M31. Our comparisons of the cluster ages, masses, and metallicities show that our results are basically in agreement with previous studies (where objects in common are available); differences can be traced back to differences in the models adopted, the fitting methods used, and stochastic sampling effects.
description: 32 pages, 12 figures, 2 tables, accepted for publication in ApJS
The lived experience of Black men involved in knife-enabled crime in London – An Interpretative Phenomenological Analysis
Creators: name: Sindiyo, Soila
Publisher: name: University of East London
Year: 2023
Subjects: knife crime
lived experience
knife-enabled crime
phenomenology

description: In England and Wales, Knife-enabled crime has pervaded the political, academic, and societal spheres since the early 2000s when he term ‘knife crime’ began to be employed (Williams & Squires, 2021). Over the years, knife-enabled crime in the UK has morphed into a racialised and genderised category of criminal activity with strong associations made between the crime and Black young boys and men. Contemporary discourse within academic research, as well as in government reports, have suggested determinants that may lead an individual toward knife-enabled crime. What seems to be lacking in the exploration of this phenomenon is the voice of the enactors and an understanding of their lived experiences. There appears to be an omission of the enactors’ perceptions, views and narratives in the majority of existing literature. This research seeks to explore the lived experience of Black men in London who have been involved in knife-enabled crime. The participants in this research are Black men, with one self-identifying as dual heritage. All four participants had used a knife to physically harm or hurt another person. Interpretative Phenomenological Analysis was adopted as the methodology. The analysis yielded four major themes emerged and 10 subthemes, which were: ‘Starting the journey into knife-enabled crime’, ‘engaging in knife-enabled crime: It’s like in a war’, ‘life after using the knife: I wanted change’, and ‘knife-enabled crime: Blackness and maleness’. The discussion contextualises these findings within contemporary discourses and recommendations are made for counselling psychologists and other clinicians in therapeutic practice. This research hopes to contribute new insights, knowledge and understanding of the knife-enabled crime phenomenon informed by the unique lived experiences and perspectives of the enactors. The research also hopes to enhance current provision of therapeutic support offered to individuals with this experience, be it in public, private or third sectors.
Obstruction Tensors in Weyl Geometry and Holographic Weyl Anomaly
Creators: name: Jia, Weizhen
name: Karydas, Manthos
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently a generalization of the Fefferman-Graham gauge for asymptotically locally AdS spacetimes, called the Weyl-Fefferman-Graham (WFG) gauge, has been proposed. It was shown that the WFG gauge induces a Weyl geometry on the conformal boundary. The Weyl geometry consists of a metric and a Weyl connection. Thus, this is a useful setting for studying dual field theories with background Weyl symmetry. Working in the WFG formalism, we find the generalization of obstruction tensors, which are Weyl-covariant tensors that appear as poles in the Fefferman-Graham expansion of the bulk metric for even boundary dimensions. We see that these Weyl-obstruction tensors can be used as building blocks for the Weyl anomaly of the dual field theory. We then compute the Weyl anomaly for $6d$ and $8d$ field theories in the Weyl-Fefferman-Graham formalism, and find that the contribution from the Weyl structure in the bulk appears as cohomologically trivial modifications. Expressed in terms of the Weyl-Schouten tensor and extended Weyl-obstruction tensors, the results of the holographic Weyl anomaly up to $8d$ also reveal hints on its expression in any dimension.
description: 37 pages; v3: minor typos fixed
Modules in the metabolic network of E.coli with regulatory interactions
Creators: name: Geryk, Jan
name: Slanina, Frantisek
Publisher: name: arXiv
Year: 2014
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We examine the modular structure of the metabolic network when combined with the regulatory network representing direct regulation of enzymes by small metabolites in E.coli. In order to identify the modular structure we introduce clustering algorithm based on a novel vertex similarity measure for bipartite graphs. We also apply a standard module identification method based on simulated annealing. Both methods identify the same modular core each of them with different resolution. We observe slight but still statistically significant increase of modularity after regulatory interactions addition. Enrichment of the metabolic network with the regulatory information leads to identification of new functional modules, which cannot be detected in the metabolic network only. Regulatory loops in the modules are the source of their self-control, i.e. autonomy, and allow to make hypothesis about module function. This study demonstrates that incorporation of regulatory information is important component in defining functional units of the metabolic network.
k-space Physics-informed Neural Network (k-PINN) for Compressed Spectral Mapping and Efficient Inversion of Vibrations in Thin Composite Laminates
Creators: name: Hedayatrasa, Saeid
name: Fink, Olga
name: Van Paepegem, Wim
name: Kersemans, Mathias
Publisher: name: arXiv
Year: 2024
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The vibrational response of structural components carries valuable information about their underlying mechanical properties, health status and operational conditions. This underscores the need for the development of efficient physics-based inversion algorithms which, given a limited set of sensing data points and in the presence of measurement noise, can reconstruct the response at locations where measurement data is not available and/or identify the unknown mechanical properties. Addressing this challenge, Physics-Informed Neural Networks (PINNs) have emerged as a promising approach. PINNs seamlessly integrate governing equations into their architecture and have gained significant interest in solving inversion problems. In the context of learning and inversion of multimodal, multiscale vibrational responses, this paper introduces a novel spectral extension of PINNs, utilizing Fourier basis functions in the wavenumber domain, commonly known as k-space. The proposed k-space PINN (k-PINN), offers a robust framework for adjusting complexity and wavenumber composition of the response. Notably, the spectral formulation of k-PINN, coupled with the generally sparse representation of vibrations in k-space, facilitate efficient reconstruction and learning of broadband vibrations and alleviate the spectral bias associated with standard PINN. Additionally, the spectral solution space introduced by k-PINN substantially reduces the computational cost associated with computing physics-informed loss terms. We evaluate the effectiveness of the proposed methodology on reconstructing the bending vibrational mode shapes of a thin composite laminate and identifying its effective bending stiffness coefficients. It is shown that the proposed k-PINN methodology outperforms the standard PINN in terms of both learning and computational efficiency.
description: Revised: References, Figures 3&4, Equation 19&31, and discussions
Feedback control of social distancing for COVID-19 via elementary formulae
Creators: name: Fliess, Michel
name: Join, Cédric
name: d'Onofrio, Alberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: Social distancing has been enacted in order to mitigate the spread of COVID-19. Like many authors, we adopt the classic epidemic SIR model, where the infection rate is the control variable. Its differential flatness property yields ele mentary closed-form formulae for open-loop social distancing scenarios, where, for instance, the increase of the number of uninfected people may be taken into account. Those formulae might therefore be useful to decision makers. A feedback loop stemming from model-free control leads to a remarkable robustness with respect to severe uncertainties and mismatches. Although an identification procedure is presented, a good knowledge of the recovery rate is not necessary for our control strategy.
description: 10th Vienna International Conference on Mathematical Modelling (MATHMOD 2022) -- July 27-29, 2022 -- Vienna, Austria
A k-deformed Model of Growing Complex Networks with Fitness
Creators: name: Stella, Massimo
name: Brede, Markus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Barabási-Bianconi (BB) fitness model can be solved by a mapping between the original network growth model to an idealized bosonic gas. The well-known transition to Bose-Einstein condensation in the latter then corresponds to the emergence of "super-hubs" in the network model. Motivated by the preservation of the scale-free property, thermodynamic stability and self-duality, we generalize the original extensive mapping of the BB fitness model by using the nonextensive Kaniadakis k-distribution. Through numerical simulation and mean-field calculations we show that deviations from extensivity do not compromise qualitative features of the phase transition. Analysis of the critical temperature yields a monotonically decreasing dependence on the nonextensive parameter k.
Further examples of GGC and HCM densities
Creators: name: Jedidi, Wissem
name: Simon, Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We display several examples of generalized gamma convoluted and hyperbolically completely monotone random variables related to positive $α$-stable laws. We also obtain new factorizations for the latter, refining Kanter's and Pestana-Shanbhag-Sreehari's. These results give stronger credit to Bondesson's hypothesis that positive $α$-stable densities are hyperbolically completely monotone whenever $α\le1/2.$
description: Published in at http://dx.doi.org/10.3150/12-BEJ431 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Competing topological phases in a non-Hermitian time-reversal symmetry-broken Bernevig-Hughes-Zhang model
Creators: name: Halder, Dipendu
name: Lahiri, Srijata
name: Basu, Saurabh
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Bernevig-Hughes-Zhang (BHZ) model, which serves as a cornerstone in the study of the quantum spin Hall insulators, showcases robust spin-filtered helical edge states in a nanoribbon geometry. In the presence of an in-plane magnetic field, these (first-order) helical states gap out to be replaced by second-order corner states under suitable open-boundary conditions. Here, we show that the inclusion of a spin-dependent non-Hermitian balanced gain/loss potential induces a competition between these first and second-order topological phases. Surprisingly, the previously dormant first-order helical edge states in the nanoribbon resurface as the non-Hermitian effect intensifies, effectively neutralizing the role played by the magnetic field. By employing the projected spin spectra and the spin Chern number, we conclusively explain the resurgence of the first-order topological properties in the time-reversal symmetry-broken BHZ model in presence of non-Hermiticity. Finally, the biorthogonal spin-resolved Berry phase, exhibiting a non-trivial winding, definitively establishes the topological nature of these revived edge states, emphasizing the dominance of non-Hermiticity over the magnetic field.
description: Published in Physical Review B
Additional file 1 of Systematic review of the incidence of post-operative trichiasis in Africa
Creators: name: Mwangi, Grace
name: Courtright, Paul
name: Solomon, Anthony W
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1.
On Cropped versus Uncropped Training Sets in Tabular Structure Detection
Creators: name: Akkaya, Yakup
name: Simsek, Murat
name: Kantarci, Burak
name: Khan, Shahzad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Automated document processing for tabular information extraction is highly desired in many organizations, from industry to government. Prior works have addressed this problem under table detection and table structure detection tasks. Proposed solutions leveraging deep learning approaches have been giving promising results in these tasks. However, the impact of dataset structures on table structure detection has not been investigated. In this study, we provide a comparison of table structure detection performance with cropped and uncropped datasets. The cropped set consists of only table images that are cropped from documents assuming tables are detected perfectly. The uncropped set consists of regular document images. Experiments show that deep learning models can improve the detection performance by up to 9% in average precision and average recall on the cropped versions. Furthermore, the impact of cropped images is negligible under the Intersection over Union (IoU) values of 50%-70% when compared to the uncropped versions. However, beyond 70% IoU thresholds, cropped datasets provide significantly higher detection performance.
Additional file 1 of Stairway Plot 2: demographic history inference with folded SNP frequency spectra
Creators: name: Liu, Xiaoming
name: Fu, Yun-Xin
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Fig. S1-S4.
Parity violation in primordial tensor non-Gaussianities from matter bounce cosmology
Creators: name: Akama, Shingo
name: Zhu, Mian
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been shown that primordial tensor non-Gaussianities from a cubic Weyl action with a non-dynamical coupling are suppressed by the so-called slow-roll parameter in a conventional framework of slow-roll inflation. In this paper, we consider matter bounce cosmology in which the background spacetime is no longer quasi-de Sitter, and hence one might expect that the matter bounce models could predict non-suppressed non-Gaussianities. Nevertheless, we first show that the corresponding non-Gaussian amplitudes from the cubic Weyl term with a non-dynamical coupling are much smaller than those from the conventional slow-roll inflation, in spite of the fact that there is no slow-roll suppression. We then introduce a dynamical coupling that can boost the magnitude of graviton cubic interactions and clarify that there is a parameter region where the tensor non-Gaussianities can be enhanced and can potentially be tested by cosmic microwave background experiments.
description: JCAP published version
On the Origin of Minnaert Resonances
Creators: name: Mantile, Andrea
name: Posilicano, Andrea
name: Sini, Mourad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35, 35B40, 35P25

description: It is well known that the presence, in a homogeneous acoustic medium, of a small inhomogeneity (of size $\varepsilon$), enjoying a high contrast of both its mass density and bulk modulus, amplifies the generated total fields. This amplification is more pronounced when the incident frequency is close to the Minnaert frequency $ω_{M}$. Here we explain the origin of such a phenomenon: at first we show that the scattering of an incident wave of frequency $ω$ is described by a self-adjoint $ω$-dependent Schrödinger operator with a singular $δ$-like potential supported at the inhomogeneity interface. Then we show that, in the low energy regime (corresponding in our setting to $\varepsilon\ll1$) such an operator has a non-trivial limit (i.e., it asymptotically differs from the Laplacian) if and only if $ω=ω_{M}$. The limit operator describing the non-trivial scattering process is explicitly determined and belongs to the class of point perturbations of the Laplacian. When the frequency of the incident wave approaches $ω_{M}$, the scattering process undergoes a transition between an asymptotically trivial behaviour and a non-trivial one.
description: Latex, 31 pages, improved version
title: А2. Золотое кольцо. Русский язык для иностранцев. Базовый уровень (The Golden ring. Russian for foreigners. Basic level)
title: Учебник
titleType: Subtitle
Creators: name: Лёвина Г.М.
name:  Николенко Е.Ю.
Publisher: name: Ай Пи Эр Медиа
Year: 2019

description: Цель учебника — формирование у иностранных учащихся коммуникативной компетенции во владении русским языком на уровне А2 и подготовка к сдаче экзаменов для получения сертификата о владении русским языком на уровне А2. Весь лексико-грамматический материал представляется в форме 3 больших полилогов (диалог многих участников), материал каждого полилога отрабатывается на протяжении нескольких уроков в виде диалогов, текстов, упражнений. Учебник предназначен иностранным учащимся, прошедшим курс А1. The purpose of the textbook is to form communicative competence in Russian at the A2 level in foreign students and prepare for exams to receive a certificate of knowledge of the Russian language at A2 level. Each polylogue is practiced over several lessons in the form of dialogues, texts, exercises. The textbook is intended for foreign students who have completed the A1 course.
description: The aim is formation of foreign students ' communicative competence in the Russian language proficiency at the A2 level and preparing for the exams for obtaining the certificate of Russian language proficiency at level A2. All lexical and grammatical material is presented in the form of 3 large Poliakov (dialogue of many participants), the material of each polylogue practiced for several lessons in the form of dialogues, texts, exercises. The textbook is intended for foreign students who passed the course A1. The purpose of the textbook is to form communicative competence in Russian at the A2 level in foreign students and prepare for exams to receive a certificate of knowledge of the Russian language at A2 level. Each polylogue is practiced over several lessons in the form of dialogues, texts, exercises. The textbook is intended for foreign students who have completed the A1 course.
title: А1. Золотое кольцо. Русский язык для начинающих (金环 俄语教材第一册)
title: Учебник
titleType: Subtitle
Creators: name: Лёвина Г.М.
name:  Николенко Е.Ю.
Publisher: name: Ай Пи Эр Медиа
Year: 2019

description: Учебник на основе авторской методики позволяет тем, кто начинает изучать русский язык, быстро овладеть основами разговорной речи, научиться понимать отдельные высказывания на русском языке и составлять собственные на базе 500 лексических единиц. Знакомит с началами грамматики: род и число имен, понятие о виде и времени глагола. Объем первой части: 30–40 аудиторных часов (1 кредит) + 30–40 часов самостоятельной работы (1 кредит). Учебник предназначен для подготовительных факультетов, курсов русского языка, индивидуального обучения. 本教材根据作者的教学经验，适用于从零起点学习俄语的学生。基于500个词汇量您能很快掌握口语基础知识，进行独立对话。了解俄语初级语法：名词的性，数；动词的时，体概念。第一部分内容：30–40教学课时+30–40自学课时. 本教材适用入读俄高校预科系学生，俄语课程及个人研究.
description: Textbook based on the author's methodology allows those who begin to learn Russian language quickly master the basics of spoken language, learn to understand individual statements in the Russian language and to make their own on the basis of 500 lexical units. Introduces the principles of grammar: gender and number of names, the concept of view and tense. The volume of the first part: 30-40 contact hours (1 credit) + 30-40 hours of independent work (1 credit). The tutorial is intended for preparatory faculty, Russian language courses, individual training. 本教材根据作者的教学经验，适用于从零起点学习俄语的学生。基于500个词汇量您能很快掌握口语基础知识，进行独立对话。了解俄语初级语法：名词的性，数；动词的时，体概念。第一部分内容：30–40教学课时+30–40自学课时. 本教材适用入读俄高校预科系学生，俄语课程及个人研究.
Controlled Secret Sharing Protocol using a Quantum Cloning Circuit
Creators: name: Adhikari, Satyabrata
name: Roy, Sovik
name: Chakraborty, Shantanav
name: Jagadish, V.
name: Haris, M. K.
name: Kumar, Atul
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate the possibility of controlling the success probability of a secret sharing protocol using a quantum cloning circuit. The cloning circuit is used to clone the qubits containing the encoded information and {\em en route} to the intended receipients. The success probability of the protocol depends on the cloning parameters used to clone the qubits. We also establish a relation between the concurrence of initially prepared state, entanglement of the mixed state received by the receivers after cloning scheme and the cloning parameters of cloning machine.
description: This is a modified version of the previous work quant-ph/arXiv:1011.2868
ESO-H$α$~574 and Par-Lup3-4 Jets: Exploring the spectral, kinematical and physical properties
Creators: name: Whelan, E. T.
name: Bonito, R.
name: Antoniucci, S.
name: Alcalá, J. M.
name: Giannini, T.
name: Nisini, B.
name: Bacciotti, F.
name: Podio, L.
name: Stelzer, B.
name: Comerón, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper a comprehensive analysis of VLT / X-Shooter observations of two jet systems, namely ESO-H$α$ 574 a K8 classical T Tauri star and Par-Lup 3-4 a very low mass (0.13~\Msun) M5 star, is presented. Both stars are known to have near-edge on accretion disks. A summary of these first X-shooter observations of jets was given in a 2011 letter. The new results outlined here include flux tables of identified emission lines, information on the morphology, kinematics and physical conditions of both jets and, updated estimates of $\dot{M}_{out}$ / $\dot{M}_{acc}$. Asymmetries in the \eso flow are investigated while the \para jet is much more symmetric. The density, temperature, and therefore origin of the gas traced by the Balmer lines are investigated from the Balmer decrements and results suggest an origin in a jet for \eso while for \para the temperature and density are consistent with an accretion flow. $\dot{M}_{acc}$ is estimated from the luminosity of various accretion tracers. For both targets, new luminosity relationships and a re-evaluation of the effect of reddening and grey extinction (due to the edge-on disks) allows for substantial improvements on previous estimates of $\dot{M}_{acc}$. It is found that log($\dot{M}_{acc}$) = -9.15 $\pm$ 0.45~\Msun yr$^{-1}$ and -9.30 $\pm$ 0.27~\Msun yr$^{-1}$ for \eso and \para respectively. Additionally, the physical conditions in the jets (electron density, electron temperature, and ionisation) are probed using various line ratios and compared with previous determinations from iron lines. The results are combined with the luminosity of the [SII]$λ$6731 line to derive $\dot{M}_{out}$ through a calculation of the gas emissivity based on a 5-level atom model.
description: 22 pages, 13 figures, Accepted by A&A
Dark Dimension and the Effective Field Theory limit
Creators: name: Branchina, Carlo
name: Branchina, Vincenzo
name: Contino, Filippo
name: Pernace, Arcangelo
Publisher: name: arXiv
Year: 2024
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: In [1] we pointed out that in the Dark Dimension scenario [2] theoretical issues arise when the prediction for the vacuum energy $ρ$, that is obtained from swampland conjectures in string theory, is confronted with the corresponding result for $ρ$ in the effective field theory (EFT) limit. One of the problems concerns the widely spread belief that in higher dimensional EFTs with compact dimensions the vacuum energy is automatically finite. On the contrary, our analysis shows that $ρ$ contains (previously missed) UV-sensitive terms. Our work was challenged in [3]. Here we show why in our opinion the claims in [3] are flawed, and provide further support to our findings. We conclude presenting ideas on the physical mechanism that should dispose of the large UV contributions to $ρ$.
description: 19 pages; 1 figure; 2 appendices. Accepted for publication in International Journal of Geometric Methods in Modern Physics (DOI:10.1142/S0219887824503031)
Generalized $su(1,1)$ coherent states for pseudo harmonic oscillator and their nonclassical properties
Creators: name: Mojaveri, B.
name: Dehghani, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81V80

description: In this paper we define a non-unitary displacement operator, which by acting on the vacuum state of the pseudo harmonic oscillator (PHO), generates new class of generalized coherent states (GCSs). An interesting feature of this approach is that, contrary to the Klauder-Perelomov and Barut-Girardello approaches, it does not require the existence of dynamical symmetries associated with the system under consideration. These states admit a resolution of the identity through positive definite measures on the complex plane. We have shown that the realization of these states for different values of the deformation parameters leads to the well-known Klauder-Perelomov and Barut-Girardello CSs associated with the $su(1,1)$ Lie algebra. This is why we call them the generalized $su(1,1)$ CSs for the PHO. Finally, study of some statistical characters such as squeezing, anti-bunching effect and sub-Poissonian statistics reveals that the constructed GCSs have indeed nonclassical features.
description: arXiv admin note: substantial text overlap with arXiv:1212.6888
Thermoelectric Effect in Altermagnet-Superconductor Junctions
Creators: name: Sukhachov, Pavlo O.
name: Hodt, Erik Wegner
name: Linder, Jacob
Publisher: name: arXiv
Year: 2024
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose altermagnet-superconductor junctions as a way to achieve a thermoelectric response in metals free of external or stray magnetic fields. We combine qualitative analysis in a simplified model with a more rigorous approach based on the inverse proximity effect in the functional-integral formulation. We show that coupling an altermagnet to a superconductor in a bilayer induces a momentum-dependent spin-splitting in the superconductor. When tunneling occurs between this bilayer and a different altermagnet, a spin-dependent particle-hole symmetry breakdown arises in the transport, which leads to a thermoelectric response. Our results show that the altermagnet-superconductor junctions may achieve comparable thermoelectric performance to ferromagnet-superconductor junctions, featuring a nonmonotonic dependence of the figure of merit on the strength of the altermagnetic splitting. We also point out an often overlooked fact regarding the inverse proximity effect in superconductors, namely that even in a normal metal-superconductor junction there is a minigap in the superconductor, which gives rise to a four-peak structure in the DOS reminiscent of spin-split superconductors. Our results show that altermagnetic metals, unlike conventional antiferromagnets, can be used for efficient cryogenic thermoelectricity.
description: 14 pages, 11 multi-panel figures
Bounds for the Twin-width of Graphs
Creators: name: Ahn, Jungho
name: Hendrey, Kevin
name: Kim, Donggyu
name: Oum, Sang-il
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C35

description: Bonnet, Kim, Thomassé, and Watrigant (2020) introduced the twin-width of a graph. We show that the twin-width of an $n$-vertex graph is less than $(n+\sqrt{n\ln n}+\sqrt{n}+2\ln n)/2$, and the twin-width of an $m$-edge graph for a positive $m$ is less than $\sqrt{3m}+ m^{1/4} \sqrt{\ln m} / (4\cdot 3^{1/4}) + 3m^{1/4} / 2$. Conference graphs of order $n$ (when such graphs exist) have twin-width at least $(n-1)/2$, and we show that Paley graphs achieve this lower bound. We also show that the twin-width of the Erdős-Rényi random graph $G(n,p)$ with $1/n\leq p=p(n)\leq 1/2$ is larger than $2p(1-p)n - (2\sqrt{2}+\varepsilon)\sqrt{p(1-p)n\ln n}$ asymptotically almost surely for any positive $\varepsilon$. Lastly, we calculate the twin-width of random graphs $G(n,p)$ with $p\leq c/n$ for a constant $c<1$, determining the thresholds at which the twin-width jumps from $0$ to $1$ and from $1$ to $2$.
description: 22 pages, 1 figure
5G-WAVE: A Core Network Framework with Decentralized Authorization for Network Slices
Creators: name: Sharma, Pragya
name: Atalay, Tolga
name: Gibbs, Hans-Andrew
name: Stojadinovic, Dragoslav
name: Stavrou, Angelos
name: Wang, Haining
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: 5G mobile networks leverage Network Function Virtualization (NFV) to offer services in the form of network slices. Each network slice is a logically isolated fragment constructed by service chaining a set of Virtual Network Functions (VNFs). The Network Repository Function (NRF) acts as a central OpenAuthorization (OAuth) 2.0 server to secure inter-VNF communications resulting in a single point of failure. Thus, we propose 5G-WAVE, a decentralized authorization framework for the 5G core by leveraging the WAVE framework and integrating it into the OpenAirInterface (OAI) 5G core. Our design relies on Side-Car Proxies (SCPs) deployed alongside individual VNFs, allowing point-to-point authorization. Each SCP acts as a WAVE engine to create entities and attestations and verify incoming service requests. We measure the authorization latency overhead for VNF registration, 5G Authentication and Key Agreement (AKA), and data session setup and observe that WAVE verification introduces 155ms overhead to HTTP transactions for decentralizing authorization. Additionally, we evaluate the scalability of 5G-WAVE by instantiating more network slices to observe 1.4x increase in latency with 10x growth in network size. We also discuss how 5G-WAVE can significantly reduce the 5G attack surface without using OAuth 2.0 while addressing several key issues of 5G standardization.
KOHTD: Kazakh Offline Handwritten Text Dataset
Creators: name: Toiganbayeva, Nazgul
name: Kasem, Mahmoud
name: Abdimanap, Galymzhan
name: Bostanbekov, Kairat
name: Abdallah, Abdelrahman
name: Alimova, Anel
name: Nurseitov, Daniyar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Despite the transition to digital information exchange, many documents, such as invoices, taxes, memos and questionnaires, historical data, and answers to exam questions, still require handwritten inputs. In this regard, there is a need to implement Handwritten Text Recognition (HTR) which is an automatic way to decrypt records using a computer. Handwriting recognition is challenging because of the virtually infinite number of ways a person can write the same message. For this proposal we introduce Kazakh handwritten text recognition research, a comprehensive dataset of Kazakh handwritten texts is necessary. This is particularly true given the lack of a dataset for handwritten Kazakh text. In this paper, we proposed our extensive Kazakh offline Handwritten Text dataset (KOHTD), which has 3000 handwritten exam papers and more than 140335 segmented images and there are approximately 922010 symbols. It can serve researchers in the field of handwriting recognition tasks by using deep and machine learning. We used a variety of popular text recognition methods for word and line recognition in our studies, including CTC-based and attention-based methods. The findings demonstrate KOHTD's diversity. Also, we proposed a Genetic Algorithm (GA) for line and word segmentation based on random enumeration of a parameter. The dataset and GA code are available at https://github.com/abdoelsayed2016/KOHTD.
Stellar irradiated discs and implications on migration of embedded planets II: accreting-discs
Creators: name: Bitsch, Bertram
name: Morbidelli, Alessandro
name: Lega, Elena
name: Crida, Aurélien
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The strength and direction of migration of embedded low mass planets depends on the disc's structure. It has been shown that, in discs with viscous heating and radiative transport, the migration can be directed outwards. In this paper we investigate the influence of a constant dM/dt-flux through the disc, as well as the influence of the disc's metallicity on the disc's thermodynamics. We focus on dM/dt discs, which have a net mass flux through them. Utilizing the resulting disc structure, we determine the regions of outward migration in the disc. We perform numerical hydrosimulations of dM/dt discs with viscous heating, radiative cooling and stellar irradiation in 2D in the r-z-plane. We use the explicit/implicit hydrodynamical code FARGOCA that includes a full tensor viscosity and stellar irradiation, as well as a two temperature solver that includes radiation transport in the flux-limited diffusion approximation. The migration of embedded planets is studied by using torque formulae. For a disc of gas surface density and viscosity, we find that the discs thermal structure depends on the product Sigma_G νand the amount of heavy elements, while the migration of planets additionally to the mentioned quantities, depends on the amount of viscosity itself. As a result of this, the disc structure can not be approximated by simple power laws. During the lifetime of the disc, the structure of the disc changes significantly in a non-linear way in the inner parts. In the late stages of the discs evolution, outward migration is only possible if the metallicity of the disc is high. For low metallicity, planets would migrate inwards and could potentially be lost. The presented disc structures and migration maps have important consequences on the formation of planets, as they can give hints on the different formation mechanisms for different types of planets as a function of metallicity.
description: Accepted by A&A, new version just contains language editing
Additional file 2 of Systematic review of the incidence of post-operative trichiasis in Africa
Creators: name: Mwangi, Grace
name: Courtright, Paul
name: Solomon, Anthony W
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 2.
Simulation of depth-dose curves and water equivalent ratios of energetic proton beams in cortical bone
Creators: name: Zamora-Vinaroz, Ana María
name: de Vera, Pablo
name: Abril, Isabel
name: Garcia-Molina, Rafael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Medical Physics (physics.med-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We have determined the depth-dose curve, the penetration range, and the water equivalent ratio (WER), for proton beams of clinical energies in cortical bone, by means of a detailed and accurate simulation that combines molecular dynamics and Monte Carlo techniques. The fundamental input quantities (stopping power and energy loss straggling) for the simulation were obtained from a reliable electronic excitation spectrum of the condensed-phase target, which takes into account the organic and mineral phases that form it. Our simulations with these inputs, that are in excellent agreement with the scarce data available for a cortical bone target, deviate from simulations performed using other stopping quantities, such as those provided by the International Commission on Radiation Units and Measurements (ICRU) in its widely used Report 49. The results of this work emphasize the importance of an accurate determination of the stopping quantities of cortical bone in order to advance towards the millimetric precision for the proton penetration ranges and deposited dose needed in radiotherapy.
description: Accepted version in Physical Review E (see published version in: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.110.034405), 20 pages, 6 figures
StateAFL: Greybox Fuzzing for Stateful Network Servers
Creators: name: Natella, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Operating Systems (cs.OS)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Fuzzing network servers is a technical challenge, since the behavior of the target server depends on its state over a sequence of multiple messages. Existing solutions are costly and difficult to use, as they rely on manually-customized artifacts such as protocol models, protocol parsers, and learning frameworks. The aim of this work is to develop a greybox fuzzer (StateaAFL) for network servers that only relies on lightweight analysis of the target program, with no manual customization, in a similar way to what the AFL fuzzer achieved for stateless programs. The proposed fuzzer instruments the target server at compile-time, to insert probes on memory allocations and network I/O operations. At run-time, it infers the current protocol state of the target server by taking snapshots of long-lived memory areas, and by applying a fuzzy hashing algorithm (Locality-Sensitive Hashing) to map memory contents to a unique state identifier. The fuzzer incrementally builds a protocol state machine for guiding fuzzing. We implemented and released StateaAFL as open-source software. As a basis for reproducible experimentation, we integrated StateaAFL with a large set of network servers for popular protocols, with no manual customization to accomodate for the protocol. The experimental results show that the fuzzer can be applied with no manual customization on a large set of network servers for popular protocols, and that it can achieve comparable, or even better code coverage and bug detection than customized fuzzing. Moreover, our qualitative analysis shows that states inferred from memory better reflect the server behavior than only using response codes from messages.
description: The tool is available at https://github.com/stateafl/stateafl
Continuous extension of the discrete shift translations on one-dimensional quantum lattice systems
Creators: name: Moriya, Hajime
name: Narnhofer, Heide
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 82B10, 46N55

description: We study the continuous extension of discrete shift translations on one-dimensional quantum lattice systems.
description: 13 pages with minor revisions
Digital Dark Field -- Higher Contrast and Greater Specificity Dark Field Imaging using a 4DSTEM Approach
Creators: name: MacLaren, Ian
name: Fraser, Andrew T.
name: Lipsett, Matthew R.
name: Ophus, Colin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A new method for dark field imaging is introduced which uses scanned electron diffraction (or 4DSTEM - 4-dimensional scanning transmission electron microscopy) datasets as its input. Instead of working on simple summation of intensity, it works on a sparse representation of the diffraction patterns in terms of a list of their diffraction peaks. This is tested on a thin perovskite film containing structural ordering resulting in additional superlattice spots that reveal details of domain structures, and is shown to give much better selectivity and contrast than conventional virtual dark field imaging. It is also shown to work well in polycrystalline aggregates of CuO nanoparticles. In view of the higher contrast and selectivity, and the complete exclusion of diffuse scattering from the image formation, it is expected to be of significant benefit for characterisation of a wide variety of crystalline materials.
Measure and Hausdorff dimension of randomized Weierstrass-type functions
Creators: name: Romanowska, Julia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 28A80 (Primary), 28A78, 37A45, (Secondary)

description: In this paper we consider functions of the type $$f(x) = \sum_{n=0}^\infty a_n g(b_nx+θ_n),$$ where $(a_n)$ are independent random variables uniformly distributed on $(-a^n, a^n)$ for some $01$, $a^2b> 1$ and $g$ is a $C^1$ periodic real function with finite number of critical points in every bounded interval. We prove that the occupation measure for $f$ has $L^2$ density almost surely. Furthermore, the Hausdorff dimension of the graph of $f$ is almost surely equal to $D = 2+ \log{a}/\log{b}$ provided $ b = \lim_{n\rightarrow \infty}b_{n+1}/b_n>1$ and $ab>1$.
Templates for agreements and contracts on research data and materials
Creators: name: Ojanen, Mikko
Publisher: name: Zenodo
Year: 2018
Subjects: Agreements
Research data
Resesarch material

description: This set of documents includes templates for agreements on research data and materials - both templates as pdf files and docx versions for furher editing - currently in Finnish only. Primarily these documents are to be used in the research project conducted by The University of Helsinki Electronic Music Studio in the project concentrated on the history and analysis of electroacoustic music in Finland and Erkki Kurenniemi's electronic musical instruments. However, documents as templates for further editing are set available under the CC-0 license and thus free to use by anyone.

Responsible investigator: mikko.ojanen@helsinki.fi
Silent Disco: Evaluating Social Motor Coordination as a Means of Promoting Social Connectedness
Creators: name: Soesanto, Olivia N.
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: Social isolation has been identified as a risk factor for various physical, psychological, and cognitive problems. However, interventions addressing this issue are currently limited. Many are not theoretically grounded, expensive, or have limited generalisability. Research on social motor coordination (SMC), defined as the intentional or unintentional coordination of movement between individuals in a social setting, has been linked to psychosocial outcomes that may be beneficial in fostering social connectedness – a protective factor against the detrimental effects of social isolation. The current study uses a silent disco paradigm to explore a theoretically driven, empirical investigation on how social connectedness may be promoted or enhanced by creating opportunities to socially interact and coordinate. Groups of 4 took part in a silent disco. Groups listened to either the same music (the same track at the same time) or different music (different tracks at any one time). Visual information was also manipulated by having groups first listened and danced with the curtains closed (2 minutes) and then open (10 minutes). Head movements were recorded with a wireless motion tracking system, attached to the silent disco headphones. Psychosocial outcomes were measured using questionnaires completed prior to and after participation in the silent disco. Results showed that groups that listened to the same music have greater degree of SMC than groups that listened to different music. Greater degrees of SMC were also observed when group members were able to see one another. Findings also demonstrated that greater SMC was associated with increased self-other overlap and increased perceived quality of interaction. This study provides evidence that silent disco is a potential method for creating opportunities to interact and coordinate to promote and enhance social connectedness.
Vários, Gran Enciclopédia Rialp. Ed. Rialp. 24 vols. (900 págs. cada um). 3.ª reimpressão revista. Madrid 1984. (Ed. Rialp S.A., Preciados 34, 28013 — Madrid España).
Creators: name: Aréchaga, Ignacio
name: Marques, José A.
Publisher: name: Theologica
Year: 1984

description: Theologica, v. 19 n. 1-2 (1984)