cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tunable Quantum Chaos in the Sachdev-Ye-Kitaev Model Coupled to a Thermal Bath
Creators: name: Chen, Yiming
name: Zhai, Hui
name: Zhang, Pengfei
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Sachdev-Ye-Kitaev (SYK) model describes Majorana fermions with random interaction, which displays many interesting properties such as non-Fermi liquid behavior, quantum chaos, emergent conformal symmetry and holographic duality. Here we consider a SYK model or a chain of SYK models with $N$ Majorana fermion modes coupled to another SYK model with $N^2$ Majorana fermion modes, in which the latter has many more degrees of freedom and plays the role as a thermal bath. For a single SYK model coupled to the thermal bath, we show that although the Lyapunov exponent is still proportional to temperature, it monotonically decreases from $2π/β$ ($β=1/(k_BT)$, $T$ is temperature) to zero as the coupling strength to the thermal bath increases. For a chain of SYK models, when they are uniformly coupled to the thermal bath, we show that the butterfly velocity displays a crossover from a $\sqrt{T}$-dependence at relatively high temperature to a linear $T$-dependence at low temperature, with the crossover temperature also controlled by the coupling strength to the thermal bath. If only the end of the SYK chain is coupled to the thermal bath, the model can introduce a spatial dependence of both the Lyapunov exponent and the butterfly velocity. Our models provide canonical examples for the study of thermalization within chaotic models.
description: 28 pages, 9 figures. References added
Milena Vasić, Personal Adornment in the Neolithic Middle East: A Case Study of Çatalhöyük
Creators: name: Dietrich, Oliver
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Rezension zu: Milena Vasić, Personal Adornment in the Neolithic Middle East: A Case Study of Çatalhöyük. Studies in Early Near Eastern Production, Subsistence, and Environment 22. ex oriente, Berlin 2020. 54,–€. ISBN 978-3-944178-17-2. x + 234 Seiten mit 110 Abbildungen
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
Enhancing entropy and enthalpy fluctuations to drive crystallization in atomistic simulations
Creators: name: Piaggi, Pablo M.
name: Valsson, Omar
name: Parrinello, Michele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Crystallization is a process of great practical relevance in which rare but crucial fluctuations lead to the formation of a solid phase starting from the liquid. Like in all first order first transitions there is an interplay between enthalpy and entropy. Based on this idea, to drive crystallization in molecular simulations, we introduce two collective variables, one enthalpic and the other entropic. Defined in this way, these collective variables do not prejudge the structure the system is going to crystallize into. We show the usefulness of this approach by studying the case of sodium and aluminum that crystallize in the bcc and fcc crystalline structure, respectively. Using these two generic collective variables, we perform variationally enhanced sampling and well tempered metadynamics simulations, and find that the systems transform spontaneously and reversibly between the liquid and the solid phases.
description: 4 pages, 2 figures
Dieter Kaufmann, Die Rössener Kultur in Mitteldeutschland. Die rössenzeitlichen Geräte aus Felsgestein
Creators: name: Biermann, Eric
name: Hubbard, Steven Joel
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Rezension zu: Dieter Kaufmann, Die Rössener Kultur in Mitteldeutschland. Die rössenzeitlichen Geräte aus Felsgestein. Veröffentlichungen des Landesamtes für Denkmalpflege und Archäologie Sachsen-Anhalt Band 72/V and 72/VI = Die Rössener Kultur in Mitteldeutschland Band 5. Landesamt für Denkmalpflege und Archäologie Sachsen-Anhalt, Halle (Saale) 2020. € 79.00. ISBN 978-3-948618-05-6. 645 pages with 58 illustrations and 120 plates
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
PIGTIKAL (puzzles in geometry that I know and love)
Creators: name: Petrunin, Anton
Publisher: name: arXiv
Year: 2009
Subjects: subject: History and Overview (math.HO)
subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53Cxx, 51Kxx, 53Axx

description: Problems for the graduate students who want to improve problem-solving skills in geometry. Every problem has a short elegant solution -- this gives a hint which was not available when the problem was discovered.
description: Second printing, 195 problems, 156 pages, 66 figures
How sample size impacts probabilistic stimulation maps in deep brain stimulation
Creators: name: Nordin, Teresa
name: Blomstedt, Patric
name: Hemm-Ode, Simone
name: Wårdell, Karin
Publisher: name: MDPI
Year: 2023
Subjects: subject: 600 - Technik, Medizin, angewandte Wissenschaften

description: Probabilistic stimulation maps of deep brain stimulation (DBS) effect based on voxel-wise statistics (p-maps) have increased in literature over the last decade. These p-maps require correction for Type-1 errors due to multiple testing based on the same data. Some analyses do not reach overall significance, and this study aims to evaluate the impact of sample size on p-map computation. A dataset of 61 essential tremor patients treated with DBS was used for the investigation. Each patient contributed with four stimulation settings, one for each contact. From the dataset, 5 to 61 patients were randomly sampled with replacement for computation of p-maps and extraction of high- and low-improvement volumes. For each sample size, the process was iterated 20 times with new samples generating in total 1140 maps. The overall p-value corrected for multiple comparisons, significance volumes, and dice coefficients (DC) of the volumes within each sample size were evaluated. With less than 30 patients (120 simulations) in the sample, the variation in overall significance was larger and the median significance volumes increased with sample size. Above 120 simulations, the trends stabilize but present some variations in cluster location, with a highest median DC of 0.73 for n = 57. The variation in location was mainly related to the region between the high- and low-improvement clusters. In conclusion, p-maps created with small sample sizes should be evaluated with caution, and above 120 simulations in single-center studies are probably required for stable results.
Fritz Jürgens, Der bandkeramische Zentralort von Borgentreich-Großeneder (Kr. Höxter)
Creators: name: Pyzel, Joanna
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Rezension zu: Fritz Jürgens, Der bandkeramische Zentralort von Borgentreich-Großeneder (Kr. Höxter). Universitätsforschungen zur prähistorischen Archäologie Band 340. Aus dem Institut für Ur- und Frühgeschichte der Universität Kiel. Verlag Dr. Rudolf Habelt GmbH, Bonn 2019. € 83.00. ISBN 978-3-7749-4199-1. 260 pages with 80 figures, 75 tables and three plans as supplements
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
Post-COVID-19 hematologic complications: a systematic review
Creators: name: Alahyari, Sam
name: Moradi, Milad
name: Rajaeinejad, Mohsen
name: Jalaeikhoo, Hasan
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Marine Biology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: COVID-19 crisis continues around the world. Some patients developed complications after the disease, which have been reported in limited studies. The aim of this study is to comprehensively assess the post-COVID hematologic complications in patients. We searched PubMed, Scopus, and Google Scholar between January 2020 and August 2021 using related keywords. Evaluation of the article was performed by two independent researchers. The extracted data included the number of patients, age, type of hematological complication, duration of follow-up, response to treatment and prognosis. Sixty-five articles reported post-COVID hematologic complications. The most frequent hematologic complication in COVID-19 patients is thromboembolic events, which often occur in two forms: deep vein thrombosis (DVT) and pulmonary embolism (PE). In a group of patients after the diagnosis of COVID-19, a significant decrease in platelets was observed, which was attributed to the ITP induced by COVID-19. Hemolytic anemia and aplastic anemia have also been reported rarely in patients. Finally, post-COVID hematologic complications appear to go beyond thromboembolic events. Although these complications have rarely been reported, searching for methods to identify susceptible patients and prevent these complications could be the subject of future research.
Polarizations of gravitational waves in $f(R)$ gravity
Creators: name: Liang, Dicong
name: Gong, Yungui
name: Hou, Shaoqi
name: Liu, Yunqi
Publisher: name: arXiv
Year: 2017
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: We point out that there are only three polarizations for gravitational waves in $f(R)$ gravity, and the polarization due to the massive scalar mode is a mix of the pure longitudinal and transverse breathing polarization. The classification of the six polarizations by the Newman-Penrose quantities is based on weak, plane and null gravitational waves, so it is not applicable to the massive mode.
description: no figure, comments are welcome, PRD in press
Nico Fröhlich, Bandkeramische Hofplätze. Artefakte der Keramikchronologie oder Abbild sozialer und wirtschaftlicher Strukturen?
Creators: name: Ilett, Michael
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Rezension zu: Nico Fröhlich, Bandkeramische Hofplätze. Artefakte der Keramikchronologie oder Abbild sozialer und wirtschaftlicher Strukturen? Frankfurter Archäologische Schriften Band 33. Verlag Rudolf Habelt GmbH, Bonn 2017. € 129.00. ISBN 978-3-7749-4012-3. XIX + 682 pages with 412 figures, 1 CD-ROM with 2 appendices and 3 inserts
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
The leptonic widths of high $ψ$-resonances in unitary coupled-channel model
Creators: name: Badalian, A. M.
name: Bakker, B. L. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The leptonic widths of high $ψ$-resonances are calculated in a coupled-channel model with unitary inelasticity, where analytical expressions for mixing angles between $(n+1)\,^3S_1$ and $n\,^3D_1$ states and probabilities $Z_i$ of the $c\bar c$ component are derived. Since these factors depend on energy (mass), different values of mixing angles $θ(ψ(4040))=27.7^\circ$ and $θ(ψ(4160))=29.5^\circ$, $Z_1\,(ψ(4040))=0.76$, and $Z_2\,(ψ(4160))=0.62$ are obtained. It gives the leptonic widths $Γ_{ee}(ψ(4040))=Z_1\, 1.17=0.89$~keV, $Γ_{ee}(ψ(4160))=Z_2\, 0.76=0.47$~keV in good agreement with experiment. For $ψ(4415)$ the leptonic width $Γ_{ee}(ψ(4415))=~0.55$~keV is calculated, while for the missing resonance $ψ(4510)$ we predict $M(ψ(4500))=(4515\pm 5)$~MeV and $Γ_{ee}(ψ(4510)) \cong 0.50$~keV.
description: 10 pages, 6 references corrected, some new material added
Dynamical Generation of Topological Masses in Dirac Fermions
Creators: name: He, Yuan-Yao
name: Xu, Xiao Yan
name: Sun, Kai
name: Assaad, Fakher F.
name: Meng, Zi Yang
name: Lu, Zhong-Yi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report discovery of a topological Mott insulator in strongly-correlated Dirac semimetals. Such an interaction-driven topological state has been theoretically proposed but not yet observed with unbiased large scale numerical simulations. In our model, interactions between electrons are mediated by Ising spins in a transverse field. The results indicate that the topological mass term is dynamically generated and the resulting quantum phase transition belongs to the (2+1)D $N=8$ chiral Ising universality class. These conclusions stem from large scale sign free quantum Monte Carlo simulations.
description: 6 pages and three figures in main text; 13 pages and 13 figures in Supplemental Material
Tunnelling Spectroscopy of Andreev States in Graphene
Creators: name: Bretheau, Landry
name: Wang, Joel I-Jan
name: Pisoni, Riccardo
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Jarillo-Herrero, Pablo
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A normal conductor placed in good contact with a superconductor can inherit its remarkable electronic properties. This proximity effect microscopically originates from the formation in the conductor of entangled electron-hole states, called Andreev states. Spectroscopic studies of Andreev states have been performed in just a handful of systems. The unique geometry, electronic structure and high mobility of graphene make it a novel platform for studying Andreev physics in two dimensions. Here we use a full van der Waals heterostructure to perform tunnelling spectroscopy measurements of the proximity effect in superconductor-graphene-superconductor junctions. The measured energy spectra, which depend on the phase difference between the superconductors, reveal the presence of a continuum of Andreev bound states. Moreover, our device heterostructure geometry and materials enable us to measure the Andreev spectrum as a function of the graphene Fermi energy, showing a transition between different mesoscopic regimes. Furthermore, by experimentally introducing a novel concept, the supercurrent spectral density, we determine the supercurrent-phase relation in a tunnelling experiment, thus establishing the connection between Andreev physics at finite energy and the Josephson effect. This work opens up new avenues for probing exotic topological phases of matter in hybrid superconducting Dirac materials.
description: 11 pages, 4+8 figures, accepted to Nature Physics. Updated version: supplementary material & references added
Frankfurt zur späten Merowingerzeit: Die Aussagen des Grabfunds in der ehemaligen Stiftskirche St. Bartholomäus
Creators: name: Päffgen, Bernd
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
Constraint Ornstein-Uhlenbeck bridges
Creators: name: Mazzolo, Alain
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this paper, we study the Ornstein-Uhlenbeck bridge process (i.e. the Ornstein-Uhlenbeck process conditioned to start and end at fixed points) constraints to have a fixed area under its path. We present both anticipative (in this case, we need the knowledge of the future of the path) and non-anticipative versions of the stochastic process. We obtain the anticipative description thanks to the theory of generalized Gaussian bridges while the non-anticipative representation comes from the theory of stochastic control. For this last representation, a stochastic differential equation is derived which leads to an effective Langevin equation. Finally, we extend our theoretical findings to linear bridge processes.
description: 20 pages, 5 figures
The Unruh effect for higher derivative field theory
Creators: name: Berra-Montiel, Jasel
name: Martínez-Montoya, Jairo
name: Molgado, Alberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 70H50, 81T20, 81S05, 83D05

description: We analyse the emergence of the Unruh effect within the context of a field Lagrangian theory associated to the Pais-Uhlenbeck fourth order oscillator model. To this end, we introduce a transformation that brings the Hamiltonian bounded from below and is consistent with $\mathcal{PT}$-symmetric quantum mechanics. We find that, as far as we consider different frequencies within the Pais-Uhlenbeck model, a particle together with an antiparticle of different masses are created as may be traced back to the Bogoliubov transformation associated to the interaction between the Unruh-DeWitt detector and the higher derivative scalar field. On the contrary, whenever we consider the equal frequencies limit, no particle creation is detected as the pair particle/antiparticle annihilate each other. Further, following Moschella and Schaeffer, we construct a Poincaré invariant two-point function for the Pais-Uhlenbeck model, which in turn allows us to perform the thermal analysis for any of the emanant particles.
description: 12 pages, no figures
A High-Resolution Finite Volume Seismic Model to Generate Seafloor Deformation for Tsunami Modeling
Creators: name: Vogl, Christopher J.
name: LeVeque, Randall J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Geophysics (physics.geo-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: A high-resolution finite volume method approach to incorporating time-dependent slip across rectangular subfaults when modeling general fault geometry is presented. The fault slip is induced by a modification of the Riemann problem to the linear elasticity equations across cell interfaces aligned with the subfaults. This is illustrated in the context of the high-resolution wave-propagation algorithms that are implemented in the open source Clawpack software (www.clawpack.org), but this approach could be easily incorporated into other Riemann solver based numerical methods. Surface deformation results are obtained in both two and three dimensions and compared to those given by the steady-state, homogeneous half-space Okada solution.
Korrigenda zu Thomas Meier, Methodenprobleme einer Chronologie der Merowingerzeit in Süddeutschland. Germania 98, 2020 (2021), 237–290. doi: https://doi.org/10.11588/ger.2020.85276.
Creators: name: Die Redaktion
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
Relaxation dynamics of the electron distribution in the Coulomb blockade problem
Creators: name: Chtchelkatchev, Ya. I. Rodionov I. S. Burmistrov N. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the relaxation dynamics of electron distribution function on the island of a single electron transistor. We focus on the 'interaction without coherence regime in which an electron coherence can be neglected but quantum fluctuations of charge are strong due to Coulomb interaction. The quantum kinetic equation governing the evolution of the electron distribution function due to escape of electrons to the reservoirs is derived. Analytical solutions for time-dependence of the electron distribution are obtained in the regimes of weak and strong Coulomb blockade. We find that usual exponential in time relaxation is strongly modified due to the presence of Coulomb interaction.
title: Bit by Bit
Creators: name: Goldbeck, Moritz
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2023

description: Digital work settings potentially facilitate remote collaboration and thereby decrease geographic frictions in knowledge work. Here, I analyze spatial collaboration patterns of some 191 thousand software developers in the United States on the largest code repository platform GitHub. Despite advanced digitization in this occupation, developers are geographically highly concentrated, with 79.8% of users clustering in only ten economic areas, and colocated developers collaborate about nine times as much as non-colocated developers. However, the colocation effect is much smaller than in less digital social or inventor networks, and apart from colocation geographic distance is of little relevance to collaboration. This suggests distance is indeed less important for collaboration in a digital work setting while other strong drivers of geographic concentration remain. Heterogeneity analyses provide insights on which types of collaboration tend to colocate: the colocation effect is smaller within larger organizations, for high-quality projects, among experienced developers, and for sporadic interactions. Overall, this results in a smaller colocation effect in larger economic areas.
Passau zwischen Spätantike und Mittelalter: Die Ausgrabungsergebnisse in der Klosterkirche Niedernburg
Creators: name: Päffgen, Bernd
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2022

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 99 2021(2022)
Enhanced nonlinear frequency conversion and Purcell enhancement at exceptional points
Creators: name: Pick, Adi
name: Lin, Zin
name: Jin, Weiliang
name: Rodriguez, Alejandro W.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We derive analytical formulas quantifying radiative emission from subwavelength emitters embedded in triply resonant nonlinear $χ^{(2)}$ cavities supporting exceptional points (EP) made of dark and leaky modes. We show that the up-converted radiation rate in such a system can be greatly enhanced---by up to two orders of magnitude---compared to typical Purcell factors achievable in non-degenerate cavities, for both monochromatic and broadband emitters. We provide a proof-of-concept demonstration by studying an inverse-designed 2D photonic-crystal slab that supports an EP formed out of a Dirac cone at the emission frequency and a phase-matched, leaky-mode resonance at the second harmonic frequency.
title: Database in Information Systems
Creators: name: ELS IPR BOOKS
Publisher: name: Международный университет информационных технологий
Year: 2021

description: The materials of guide for students contain the most necessary and important theoretical topics and laboratory tasks on databases. Students will know the basics of working with data, be able to work with structured data, which is the basis for working with big data (also with unstructured data). Even if students haven\'t written a single request yet, here they will learn the basics and apply the most important practical skills. Once they\'ve laid the foundation for how SQL works, students can then use NoSQL in Mongo DB. This knowledge student will receive in subject Databases in Information Systems, and as usually happens, many students who studied this subject, at the moment work in very reputable companies around the world, use the SQL basics obtained on this subject.
Framework on Best Practice in environmental and other research in UK Overseas Territories
Creators: name: Dr Mike Pienkowski
name: Wensink, Catherine
Publisher: name: Zenodo
Year: 2022
Subjects: best-practice, overseas territories, crown dependencies, research, conservation

description: Part of the project From blue iguanas to blue vervain: sharing the colonial histories from the UK Overseas Territories aimed to develop a framework of best practice to enable increased prospects of resourcing for environmental work in the UK Overseas Territories (UKOTs) to address needs agreed by workers in the UKOTs. If these are adhered to both by those planning work and applying for funding and permissions and by the funding bodies, there are good prospects of moving towards a more equitable system. This framework was developed by consultations involving circulating drafts to bodies active in the UKOTs, followed by an online workshop on it on 25th July 2022 to confirm the document. This framework does not arise from nowhere. It builds on the recommendations and conclusions relating of improving equity in the access to funding already agreed by UKOT and Crown Dependencies practitioners (both NGO and governmental) at the online conference of the UK Overseas Territories Conservation Forum (UKOTCF) in March 2021, Staying Connected for Conservation in a Changed World (https://www.ukotcf.org.uk/onlineconference2021/), as well as from other conferences in the series, the experience of NGOs in the UKOTs themselves and researchers based around the world, and the Statement of 4th UK Overseas Territories and Crown Dependencies Environment Ministers’ Council Meeting, 28 – 29 April 2021 (https://www.ukotcf.org.uk/environment-ministers-council/fourth-meeting-2021/). Use of this framework will also help fulfil some of UK’s commitments under various international treaties, including the Convention on Biological Diversity, for example its Nagoya Protocol on Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization to the Convention on Biological Diversity which aims at “sharing the benefits arising from the utilization of genetic resources in a fair and equitable way” (see https://www.gida-global.org/care). The framework follows the process of designing and delivering research, from the call for funding applications, through the involvement of partners, the development and consideration of applications, designing and undertaking the work, reporting it and ensuring access to the result. This Framework is available to be adopted by any organisation which wishes to strengthen equity in environmental work. See http://www.ukotcf.org.uk/framework-on-best-practice-in-environmental-and-other-research-in-uk-overseas-territories/
description: Please reference as: Pienkowski, M; Wensink, C.M (2022). Framework on Best Practice in environmental and other research in UK Overseas Territories. UK Overseas Territories Conservation Forum. UKRI Grant reference AH/W008998/1
Energy dependence of forward-rapidity J/$ψ$ and $ψ(2S)$ production in pp collisions at the LHC
Creators: name: ALICE Collaboration
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present results on transverse momentum ($p_{\rm T}$) and rapidity ($y$) differential production cross sections, mean transverse momentum and mean transverse momentum square of inclusive J/$ψ$ and $ψ(2S)$ at forward rapidity ($2.515$ GeV/$c$ the non-prompt contribution reaches up to 50% of the total charmonium yield.
description: 26 pages, 10 captioned figures, 1 table, authors from page 21, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/3364
title: Distributed and Parallel Computing
Creators: name: ELS IPR BOOKS
Publisher: name: Международный университет информационных технологий
Year: 2022

description: The textbook provides the fundamentals of parallel computing, from task parallelism to data parallelism. Each topic has an example of execution, a list of control questions and task options. Designed for undergraduate and graduate students majoring in 6B06105 «Information System», 6B06103 «Big Data Analytics», 6B06104 «Business analysis», 6M070300 «Information Systems».
The leptonic future of the Higgs
Creators: name: Durieux, Gauthier
name: Grojean, Christophe
name: Gu, Jiayin
name: Wang, Kechen
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Precision study of electroweak symmetry breaking strongly motivates the construction of a lepton collider with center-of-mass energy of at least 240 GeV. Besides Higgsstrahlung ($e^+e^- \to hZ$), such a collider would measure weak boson pair production ($e^+e^- \to WW$) with an astonishing precision. The weak-boson-fusion production process ($e^+e^- \to ν\barν h$) provides an increasingly powerful handle at higher center-of-mass energies. High energies also benefit the associated top-Higgs production ($e^+e^-\to t\bar th$) that is crucial to constrain directly the top Yukawa coupling. The impact and complementarity of differential measurements, at different center-of-mass energies and for several beam polarization configurations, are studied in a global effective-field-theory framework. We define a "global determinant parameter" (GDP) which characterizes the overall strengthening of constraints independently of the choice of operator basis. The reach of the CEPC, CLIC, FCC-ee, and ILC designs is assessed.
description: 55 pages, lots of figures, v2: references added, minor corrections, extended discussions on quadratic EFT contributions and beam polarization effects, matches published version in JHEP
Hagen-Poiseuille Flow Linear Stability Paradox Resolving and Viscous Dissipative Mechanism of the Turbulence Emergence in the Boundary Layer
Creators: name: Chefranov, Sergey G.
name: Chefranov, Alexander G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In the linear theory of hydrodynamic stability up to now there exist examples of flows for which there is full quantitative distinction, as for cylindrical Hagen-Poiseuille (HP) flow in a pipe with round section, between theory conclusions and experimental data on the threshold Reynolds number Reth. In the present work, we show that to get a conclusion of linear instability of the HP flow for finite Reynolds numbers Re, it is necessary to abandon the use of traditional 'normal' form of disturbances which assumes an opportunity of separation of variables describing disturbances variability depending on radial and longitudinal (along the pipe axis) coordinates. In the result of the absence of such variables separation, in the suggested linear theory, it is proposed to use Bubnov-Galerkin's approximation method modification that gives an opportunity to account longitudinal variability periods distinctions for different radial modes defined a priori in the result of standard Galerkin-Cantorovich's method to the equation of evolution of extremely small axially symmetric velocity field tangential component disturbances. We found that when considering even two linearly interacting radial modes for the HP flow, linear instability is possible only when there exists mentioned above conditionally periodic longitudinal along the pipe axis disturbance variability when Re_th(p) very sensitively depends on the ratio p of two longitudinal periods each of which describes longitudinal variability for its own radial mode only. Obtained for the HP flow linear instability realization minimal value Re_th=448 (when p=1.527) quantitatively agrees with the Tolmin-Shlihting waves in the boundary layer emergence, where also Re_th=420. We get quantitative agreeing of the phase velocity values of the considered disturbances with experimental data on the fronts of the turbulent 'puffs' spreading in the pipe.
description: 15 pages, 2 figures
SynDa: A Novel Synthetic Data Generation Pipeline for Activity Recognition
Creators: name: Rajendran, Megani
name: Tan, Chek Tien
name: Atmosukarto, Indriyati
name: Ng, Aik Beng
name: See, Simon
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Virtual and mixed reality

description: The task of classifying or predicting the activity performed by humans is called human activity recognition. Many existing models aim to solve the problem of activity recognition in this field, but we recognise the lack of real data can have a great impact on the effectiveness of such models. In this paper, we introduce SynDa, a first-of-its-kind streamlined semi-automated pipeline for synthetic data generation built using photorealistic rendering and AI pose estimation, that harvests existing real-life video datasets to create new large-scale datasets. The synthetic data can augment real data to train models robustly and overcome the lack of and associated costs to acquire more real data. Preliminary work indicates that combining real data and synthetic video data generated using this pipeline to train models presents a mAP of 32.35%, while a model trained on real data presented 29.95%.
Superradiance phase transition in the presence of parameter fluctuations
Creators: name: Ashhab, S.
name: Semba, K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We theoretically analyze the effect of parameter fluctuations on the superradiance phase transition in a setup where a large number of superconducting qubits are coupled to a single cavity. We include parameter fluctuations that are typical of superconducting architectures, such as fluctuations in qubit gaps, bias points and qubit-cavity coupling strengths. We find that the phase transition should occur in this case, although it manifests itself somewhat differently from the case with no fluctuations. We also find that fluctuations in the qubit gaps and qubit-cavity coupling strengths do not necessarily make it more difficult to reach the transition point. Fluctuations in the bias points, however, increase the coupling strength required to reach the quantum phase transition point and enter the superradiant phase. Similarly, these fluctuations lower the critical temperature for the thermal phase transition.
description: 8 pages (two-column), 2 figures
Log corrections to entropy of three dimensional black holes with soft hair
Creators: name: Grumiller, Daniel
name: Perez, Alfredo
name: Tempo, David
name: Troncoso, Ricardo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We calculate log corrections to the entropy of three-dimensional black holes with "soft hairy" boundary conditions. Their thermodynamics possesses some special features that preclude a naive direct evaluation of these corrections, so we follow two different approaches. The first one exploits that the BTZ black hole belongs to the spectrum of Brown-Henneaux as well as soft hairy boundary conditions, so that the respective log corrections are related through a suitable change of the thermodynamic ensemble. In the second approach the analogue of modular invariance is considered for dual theories with anisotropic scaling of Lifshitz type with dynamical exponent z at the boundary. On the gravity side such scalings arise for KdV-type boundary conditions, which provide a specific 1-parameter family of multi-trace deformations of the usual AdS3/CFT2 setup, with Brown-Henneaux corresponding to z=1 and soft hairy boundary conditions to the limiting case z=0. Both approaches agree in the case of BTZ black holes for any non-negative z. Finally, for soft hairy boundary conditions we show that not only the leading term, but also the log corrections to the entropy of black flowers endowed with affine u(1) soft hair charges exclusively depend on the zero modes and hence coincide with the ones for BTZ black holes.
description: 15 pages, no figures, v2: added ref
title: Guide for teacher-supervised independent study assignments in course of General Physics
Creators: name: ELS IPR BOOKS
Publisher: name: Международный университет информационных технологий
Year: 2022

description: The educational guide is for students and teachers in general physics, and it covers consideration of key problems on parts of general physics such as mechanics, thermal physics, electricity, magnetism, optics, relativity, and quantum physics. The educational guide is for bachelor students of IT majors studying general physics. The educational manual corresponds to the curriculum of the Physics discipline for IT majors.
Symmetry recovery of exceptional points and their dynamical encircling in a two-state system
Creators: name: Zhang, Xu-Lin
name: Wang, Shubo
name: Chen, Wen-Jie
name: Hou, Bo
name: Chan, C. T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Exceptional points are degeneracies in non-Hermitian systems. A two-state system with parity-time (PT) symmetry usually has only one exceptional point beyond which the eigenmodes are PT-symmetry broken. The so-called symmetry recovery, i.e., eigenmodes become PT-symmetric again, typically occurs in multi-state systems. Here we show that a two-state ferromagnetic waveguide system can have an exceptional point and a subsequent symmetry recovery due to the presence of accidental degeneracy points when the system is lossless. By introducing a parameter space where both exceptional points reside, we designed a system in which the trajectory in the parameter space can be controlled in situ using an adiabatically tunable external field, allowing us to explore the topological and chiral character of the system by encircling zero, one or two exceptional points. We performed microwave experiments to demonstrate the presence of the exceptional point, symmetry recovery, and the effects arising from their dynamical encircling.
description: 43 pages, 23 figures
Boltzmann-Langevin Approach to Pre-equilibrium Correlations in Nuclear Collisions
Creators: name: Gavin, Sean
name: Moschelli, George
name: Zin, Christopher
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Correlations born before the onset of hydrodynamic flow can leave observable traces on the final state particles. Measurement of these correlations can yield important information on the isotropization and thermalization process. Starting from a Boltzmann-like kinetic theory in the presence of dynamic Langevin noise, we derive a new partial differential equation for the two-particle correlation function that respects the microscopic conservation laws. We illustrate how this equation can be used to study the effect of thermalization on long range correlations.
description: 11 pages, 3 figures
Correct Definition of Color Singlet P-Wave Non-Perturbative Matrix Element of Heavy Quarkonium Production
Creators: name: Nayak, Gouranga C
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recently we have proved factorization of infrared divergences in NRQCD S-wave heavy quarkonium production at high energy colliders at all orders in coupling constant. One of the problem which still exists in the higher order pQCD calculation of color singlet P-wave heavy quarkonium production/anihillation is the appearance of non-canceling infrared divergences due to real soft gluons exchange, although no such infrared divergences are present in the color singlet S-wave heavy quarkonium. In this paper we find that since the non-perturbative matrix element of the color singlet P-wave heavy quarkonium production contains derivative operators, the gauge links are necessary to make it gauge invariant and be consistent with the factorization of such non-canceling infrared divergences at all orders in coupling constant.
description: 18 pages latex, Final Version, Accepted for Publication in JHEP
Application of Machine-Learning Models and XAI in Materials Science Using Magnetic DFT Data
Creators: name: Hilgers, Robin
name: Wortmann, Daniel
name: Blügel, Stefan
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: Helmholtz.Ai, Hamburg, Germany, 13 Jun 2023 - 14 Jun 2023
description: The prediction of material properties using ab-initio simulations [1] is a research field of fundamental significance due to the multitude of materials applications in technology and research. Such simulations can require huge computational resources if carried out for many materials, and thus the possibility to employ machine learning methods offers potential benefit by restricting the materials search space.In our work, we demonstrate this idea for the particular field of ordered and disordered magnetic Heusler alloys. In detail, we focus on theirCurie-temperature, which often is the major quantity describing the fitness of a magnetic material for application. Thus, we studied the possibility to predict the Curie-temperature and thereby classifying the materials relevance for possible technical application using machine-learning algorithms.We compared the performance of regression models and classification models in order to predict the range of the Curie-temperature of given compounds to demonstrate the possibility to reduce the computational expanses of simulating this quantity. This work can be seen as a small-scale case study in which lightweight machine learning algorithms can add value to existing simulation data and eventually replace costly computational steps in layered calculation workflows in the future. In addition, we demonstrate, that such models can lead to interesting unbiased physical insight. Acknowledgement: This work was performed as part of the Helmholtz School for Data Science in Life, Earth and Energy (HDS-LEE) and received funding from the Helmholtz Association of German Research Centres.[1] R. Kovacik, P. Mavropoulos, S. Blüugel, Materials Cloud (2022) 10.24435/MATERIALSCLOUD:WW-PV
Visco-rotational shear instability of Keplerian granular flows
Creators: name: Poniatowski, Luka G.
name: Tevzadze, Alexander G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The linear stability of viscous Keplerian flow around a gravitating center is studied using the rheological granular fluid model. The linear rheological instability triggered by the interplay of the shear rheology and Keplerian differential rotation of incompressible dense granular fluids is found. Instability sets in granular fluids, where the viscosity parameter grows faster than the square of the local shear rate (strain rate) at constant pressure. Found instability can play a crucial role in the dynamics of dense planetary rings and granular flows in protoplanetary disks.
description: 5 pages, 3 figures. Version accepted to the Physical Review E (rapid communication)
AMGKQ: An Efficient Implementation of Adaptive Multivariate Gauss-Kronrod Quadrature for Simultaneous Integrands in Octave/MATLAB
Creators: name: Johnson, Robert W.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: G.1.4

description: The algorithm AMGKQ for adaptive multivariate Gauss-Kronrod quadrature over hyper-rectangular regions of arbitrary dimensionality is proposed and implemented in Octave/MATLAB. It can approximate numerically any number of integrals over a common domain simultaneously. Improper integrals are addressed through singularity weakening coordinate transformations. Internal singularities are addressed through the use of breakpoints. Its accuracy performance is investigated thoroughly, and its running time is compared to other commonly available routines in two and three dimensions. Its running time can be several orders of magnitude faster than recursively called quadrature routines. Its performance is limited only by the memory structure of its operating environment. Included with the software are numerous examples of its invocation.
description: 17 pages, 9 figures, 4 tables, first version
Zone clearance in an infinite TASEP with a step initial condition
Creators: name: Cividini, Julien
name: Appert-Rolland, Cécile
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The TASEP is a paradigmatic model of out-of-equilibrium statistical physics, for which many quantities have been computed, either exactly or by approximate methods. In this work we study two new kinds of observables that have some relevance in biological or traffic models. They represent the probability for a given clearance zone of the lattice to be empty (for the first time) at a given time, starting from a step density profile. Exact expressions are obtained for single-time quantities, while more involved history-dependent observables are studied by Monte Carlo simulation, and partially predicted by a phenomenological approach.
title: Are Team Autonomy and Flexibility Enough for Agile Transformation? A Review of Transformed Practices in a Public Sector Organization
Creators: name: Moalagh, Morteza
name: Mikalsen, Marius
name: Farshchian, Babak A.
Publisher: name: European Society for Socially Embedded Technologies (EUSSET)
Year: 2023

description: Agile transformation is being adopted by the public sector to accelerate digitalization, but it often prioritizes internal efficiency over public values. In this ongoing case study of agile transformation in a large public organization in Norway, we apply a practice-theoretic lens to analyze changes in practices. By looking at papers that has published in recent years on this case, The open coding method was used to identify the components of the practices, including competence, meaning, and material. The study revealed that agile transformation led to a shift in software development practices, improved communication, and increased authority, which enhanced ownership, productivity, and organizational learning. The role of architects changed to advisors, and teams took full decision-making authority for managing data and architecture. The analysis of transformed practices revealed the organization made changes to allow development teams to be more autonomous and flexible in their projects. However, the organization's inherent bias towards development teams seems to hamper effective collaboration and undermines democratic participation, a fundamental value of the public sector. Also, the study also illustrates the need for boundary work and infrastructures that integrate the users/business side of the organization, beyond the development side, to address complex socio-technical interdependencies.