cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High Resolution Observations of the Low Atmospheric Response to Small Coronal Heating Events in an Active Region Core
Creators: name: Testa, Paola
name: Bakke, Helle
name: van der Voort, Luc Rouppe
name: De Pontieu, Bart
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High resolution spectral observations of the lower solar atmosphere (chromosphere and transition region) during coronal heating events, in combination with predictions from models of impulsively heated loops, provide powerful diagnostics of the properties of the heating in active region cores. Here we analyze the first coordinated observations of such events with the Interface Region Imaging Spectrograph (IRIS) and the CHROMospheric Imaging Spectrometer (CHROMIS), at the Swedish 1-m Solar Telescope (SST), which provided extremely high spatial resolution and revealed chromospheric brightenings with spatial dimensions down to ~150km. We use machine learning methods (k-means clustering) and find significant coherence in the spatial and temporal properties of the chromospheric spectra, suggesting, in turn, coherence in the spatial and temporal distribution of the coronal heating. The comparison of IRIS and CHROMIS spectra with simulations suggest that both non-thermal electrons with low energy (low-energy cutoff ~5keV) and direct heating in the corona transported by thermal conduction contribute to the heating of the low atmosphere. This is consistent with growing evidence that non-thermal electrons are not uncommon in small heating events (nano- to micro-flares), and that their properties can be constrained by chromospheric and transition region spectral observations.
description: Accepted for publication in the Astrophysical Journal. 21 pages, 13 figures
Forschungsdatenmanagement in der Archäologie
Creators: name: Bruhn, Kai-Christian
Publisher: name: Zenodo
Year: 2020
Subjects: Forschungsdatenmanagement
Archäologie
NFDI

description: Vortragsfolien Colloquium in Digital Cultural Heritage 2020/21 Institut für Digital Humanities und Archäoinformatik am Archäologischen Institut der Universität zu Köln 18. November 2020
Sensibilizzare alla scienza aperta: il nuovo sito web Open Science INFN
Creators: name: Piergentili, Irene
name: Sabatini, Lia
Publisher: name: INFN Open Access Repository
Year: 2022
Subjects: Open Science
Green Open Access
Open Access Repository
OAR
Dissemination
Metadata
Digital Communication
Institutional Repositories
Archivi istituzionali

description: Poster realizzato in occasione dell'evento GenOA week 2022 (7-11 novembre 2022, Università di Genova). Dalle attività in corso sulla diffusione dei principi dell’Open Science da parte dell’INFN è nata la necessità di creare una nuova pagina web dedicata all’Open Science, con lo scopo di stimolare, attraverso formazione e informazione, l’utilizzo dell’archivio istituzionale Open Access dell’INFN (Open Access Repository) e presentarsi come punto di riferimento per la comunità INFN. Nozioni di carattere generale si andranno ad affiancare a consigli pratici per supportare i ricercatori nella diffusione dei risultati dei loro progetti di ricerca. La pagina sarà articolata in più sezioni, alcune di carattere divulgativo, altre con informazioni pratiche per l’utilizzo dell’archivio istituzionale: - Una sezione dedicata ad approfondire le tematiche dell’Open Science e dell’Open Access, con riferimento al percorso svolto negli ultimi anni INFN. - Una sezione dedicata all’archivio istituzionale Open Access Repository, con tutorial e approfondimenti su identificatori univoci persistenti e metadati - Consigli per la scelta delle riviste in cui pubblicare, con approfondimenti sui Transformative Agreements - Una sezione Ricerche bibliografiche con collegamenti ad altri archivi Open Access Il personale bibliotecario dei LNF si occuperà di aggiornare e implementare i contenuti, in collaborazione con il GdL Open Access dell’INFN, e la pagina web diventerà un importante canale di comunicazione con la comunità di riferimento, e i bibliotecari degli altri tre laboratori INFN, che avranno la possibilità di consultare le novità sulle principali iniziative a livello nazionale e internazionale a favore dell’Open Science. L’obiettivo principale del progetto consiste infatti nell’instaurare un rapporto di fiducia con i ricercatori e il personale INFN, che potranno riconoscere nel personale coinvolto un punto di riferimento per il proprio percorso di ricerca e accrescere la consapevolezza del valore della scienza aperta.
Chiral fluid membranes with orientational order and multiple edges
Creators: name: Ding, Lijie
name: Pelcovits, Robert A.
name: Powers, Thomas R.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We carry out Monte Carlo simulations on fluid membranes with orientational order and multiple edges in the presence and absence of external forces. The membrane resists bending and has an edge tension, the orientational order couples with the membrane surface normal through a cost for tilting, and there is a chiral liquid crystalline interaction. In the absence of external forces, a membrane initialized as a vesicle will form a disk at low chirality, with the directors forming a smectic-A phase with alignment perpendicular to the membrane surface except near the edge. At large chirality a catenoid-like shape or a trinoid-like shape is formed, depending on the number of edges in the initial vesicle. This shape change is accompanied by cholesteric ordering of the directors and multiple $π$ walls connecting the membrane edges and wrapping around the membrane neck. If the membrane is initialized instead in a cylindrical shape and stretched by an external force, it maintains a nearly cylindrical shape but additional liquid crystalline phases appear. For large tilt coupling and low chirality, a smectic-A phase forms. For lower values of the tilt coupling, a nematic phase appears at zero chirality with the average director oriented perpendicular to the long axis of the membrane, while for nonzero chirality a cholesteric phase appears. The $π$ walls are tilt walls at low chirality and transition to twist walls as chirality is increased. We construct a continuum model of the director field to explain this behavior.
description: 12 pages, 13 figures
Single crystal study of the layered heavy fermion compounds Ce$_2$PdIn$_8$, Ce$_3$PdIn$_{11}$, Ce$_2$PtIn$_8$ and Ce$_3$PtIn$_{11}$
Creators: name: Kratochvilova, Marie
name: Dusek, Michal
name: Uhlirova, Klara
name: Rudajevova, Alexandra
name: Prokleska, Jan
name: Vondrackova, Barbora
name: Custers, Jeroen
name: Sechovsky, Vladimir
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report on single crystal growth and crystallographic parameters results of Ce$_2$PdIn$_8$, Ce$_3$PdIn$_{11}$, Ce$_2$PtIn$_8$ and Ce$_3$PtIn$_{11}$. The Pt-systems Ce$_2$PtIn$_8$ and Ce$_3$PtIn$_{11}$ are synthesized for the first time. All these compounds are member of the Ce$_n$T$_m$In$_{3n+2m}$ (n = 1, 2,..; m = 1, 2,.. and T = transition metal) to which the extensively studied heavy fermion superconductor CeCoIn$_5$ belongs. Single crystals have been grown by In self-flux method. Differential scanning calorimetry studies were used to derive optimal growth conditions. Evidently, the maximum growth conditions for these materials should not exceed 750 $^{\circ}$C. Single crystal x-ray data show that Ce$_2$TIn$_8$ compounds crystallize in the tetragonal Ho$_2$CoGa$_8$ phase (space group P4/mmm) with lattice parameters a =4.6898(3) $Å$ and c =12.1490(8) $Å$ for the Pt-based one (Pd: a = 4.6881(4) $Å$ and c = 12.2031(8) Å). The Ce$_3$TIn$_{11}$ compounds adopt the Ce$_3$PdIn$_{11}$ structure with a = 4.6874(4) $Å$ and c = 16.8422(12) $Å$ for the Pt-based one (Pd: a = 4.6896 $Å$ and c = 16.891 Å). Specific heat experiments on Ce$_3$PtIn$_{11}$ and Ce$_3$PdIn$_{11}$ have revealed that both compounds undergo two successive magnetic transitions at T$_1$ ~ 2.2 K followed by T$_N$ ~ 2.0 K and T$_1$ ~ 1.7 K and T$_N$ ~ 1.5 K, respectively. Additionally, both compounds exhibit enhanced Sommerfeld coefficients yielding γ$_{Pt}$ = 0.300 J/mol K$^2$ Ce (γ$_{Pd}$ = 0.290 J/mol K$^2$ Ce), hence qualifying them as heavy fermion materials.
Appendix 3, intervention definitions: systematic review of the self-management of heart failure-related fatigue
Creators: name: Duncan, Lorna
name: Stuart, Beth
name: Taylor, Clare
name: Johnson, Rachel
name: Huntley, Alyson
Publisher: name: figshare
Year: 2022
Subjects: subject: 110201 Cardiology (incl. Cardiovascular Diseases)
subject: FOS: Clinical medicine

description: Definitions of interventions in included studies, reported in the journal article: "Self-management strategies in people with heart failure-related fatigue: a systematic review" .
Additional file 3 of Identification of a HOXD13 variant in a Mongolian family with incomplete penetrance syndactyly by exon sequencing
Creators: name: Husile, Husile
name: Wu, Zhifeng
name: Yang, Liqing
name: Cao, Yaning
name: Wu, Qizhu
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Supplementary Material 3
Earth-like Habitats in Planetary Systems
Creators: name: Fritz, Jörg
name: Bitsch, Bertram
name: Kührt, Ekkehard
name: Morbidelli, Alessandro
name: Tornow, Carmen
name: Wünnemann, Kai
name: Fernandes, Vera A.
name: Grenfell, Lee J.
name: Rauer, Heike
name: Wagner, Roland
name: Werner, Stephanie C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Understanding the concept of habitability is related to an evolutionary knowledge of the particular planet-in-question. Additional indications so-called "systemic aspects" of the planetary system as a whole governs a particular planet's claim on habitability. Here we focus on such systemic aspects and discuss their relevance to the formation of an 'Earth-like' habitable planet. We summarize our results obtained by lunar sample work and numerical models within the framework of the Research Alliance "Planetary Evolution and Life". We consider various scenarios which simulate the dynamical evolution of the Solar System and discuss the likelihood of forming an Earth-like world orbiting another star. Our model approach is constrained by observations of the modern Solar System and the knowledge of its history. Results suggest that the long-term presence of terrestrial planets is jeopardized due to gravitational interactions if giant planets are present. But habitability of inner rocky planets may be supported in those planetary systems hosting giant planets. Gravitational interactions within a complex multiple-body structure including giant planets may supply terrestrial planets with materials which formed in the colder region of the proto-planetary disk. During these processes, water, the prime requisite for habitability, is delivered to the inner system. This may occur either during the main accretion phase of terrestrial planets or via impacts during a post-accretion bombardment. Results for both processes are summarized and discussed with reference to the lunar crater record. Starting from a scenario involving migration of the giant planets this contribution discusses the delivery of water to Earth, the modification of atmospheres by impacts in a planetary system context and the likelihood of the existence of extrasolar Earth-like habitable worlds.
description: 36 Pages, 6 figures, 2014, Special Issue in Planetary and Space Science on the Helmholtz Research Alliance on Planetary Evolution and Life
Kinematics and Collimation of the Two-Sided Jets in NGC 4261: VLBI Study on Sub-parsec Scales
Creators: name: Yan, Xi
name: Lu, Ru-Sen
name: Jiang, Wu
name: Krichbaum, Thomas P.
name: Shen, Zhi-Qiang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report multi-frequency VLBI studies of the sub-parsec scale structure of the two-sided jet in the nearby radio galaxy NGC 4261. Our analyses include new observations using the Source Frequency Phase Referencing technique with the Very Long Baseline Array at 44 and 88 GHz, as well as archival data at 15 and 43 GHz. Our results show an extended double-sided structure at 43/44 GHz and provide a clear image of the nuclear region at 88 GHz, showing a core size of $\sim$0.09 mas and a brightness temperature of $\sim1.3\times10^{9}$ K. Proper motions are measured for the first time in the two-sided jet, with apparent speeds ranging from $0.31\pm0.14\,c$ to $0.59\pm0.40\,c$ in the approaching jet and $0.32\pm0.14\,c$ in the receding jet. The jet-to-counter-jet brightness ratio allows us to constrain the viewing angle to between $\sim54^{\circ}$ and $84^{\circ}$ and the intrinsic speed to between $\sim0.30\,c$ and $0.55\,c$. We confirm the parabolic shape of the upstream jet on both sides of the central engine, with a power-law index of $0.56\pm0.07$. Notably, the jet collimation is found to be already completed at sub-parsec scales, with a transition location of about 0.61 pc, which is significantly smaller than the Bondi radius of 99.2 pc. This behavior can be interpreted as the initial confinement of the jet by external pressure from either the geometrically thick, optically thin advection-dominated accretion flows (ADAF) or the disk wind launched from it. Alternatively, the shape transition may also be explained by the internal flow transition from a magnetically dominated to a particle-dominated regime.
description: 9 pages, 5 figures, 2 tables
Attitude dynamics and control of spacecraft using geomagnetic Lorentz force
Creators: name: Abdel-Aziz, Yehia A.
name: Shoaib, Muhammad
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The attitude stabilization of a charged rigid spacecraft in Low Earth Orbit (LEO) using torques due to Lorentz force in pitch and roll directions is considered. A spacecraft that generates an electrostatic charge on its surface in the Earth magnetic field will be subject to perturbations from Lorentz force. The Lorentz force acting on an electrostatically charged spacecraft may provide a useful thrust for controlling a spacecraft's orientation. We assume that the spacecraft is moving in the Earth's magnetic field in an elliptical orbit under the effects of the gravitational, geomagnetic and Lorentz torques. The magnetic field of the Earth is modeled as a non-tilted dipole. A model incorporating all Lorentz torques as a function of orbital elements has been developed on the basis of electric and magnetic fields. The stability of the spacecraft orientation is investigated both analytically and numerically. The existence and stability of equilibrium positions is investigated for different values of the charge to mass ratio ($α^*$). Stable orbits are identified for various values of $α^*$. The main parameters for stabilization of the spacecraft are $α^*$ and the difference between the components of the moment of inertia of spacecraft.
description: To appear in Research in Astronomy and Astrophysics (RAA)
Additional file 1 of Humans-livestock predators conflict in the Central and Eastern Part of Bale Mountains National Park, Ethiopia
Creators: name: Sebsibe, Israel
Publisher: name: figshare
Year: 2022
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 1. Questionnaires. The data gathering questionnaires were developed after a critical and detailed reviews of previously conducted similar research.
Coevolutionary dynamics of information spreading and heterophilic link rewiring
Creators: name: Choi, Jeehye
name: Min, Byungjoon
Publisher: name: arXiv
Year: 2023
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: In many complex systems, the dynamic processes that take place on a network and the changes in the network topology are intertwined. Here, we propose a model of coevolutionary dynamics of information spreading which is accompanied with link rewiring to facilitate the propagation of information. In our model, nodes possessing information attempt to contact new susceptible nodes through the link rewiring while the information spreads on a network. Using moment-closure and heterogeneous mean-field approximations, we examine both the information spread dynamics and network evolution focusing on epidemic size, epidemic threshold, and degree distributions at the steady state. We found that more frequent heterophilic link rewiring leads to a larger epidemic size but does not alter the epidemic threshold. We also observed that link rewiring results in a broader degree distribution in the steady state. This study provides an insight into the the role of the heterophilic link rewiring in both facilitating information propagation and inducing network heterogeneity.
description: 6 pages, 4 figures
The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
Creators: name: Worseck, Gábor
name: Prochaska, J. Xavier
name: O'Meara, John M.
name: Becker, George D.
name: Ellison, Sara
name: Lopez, Sebastian
name: Meiksin, Avery
name: Ménard, Brice
name: Murphy, Michael T.
name: Fumagalli, Michele
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have obtained spectra of 163 quasars at $z_\mathrm{em}>4.4$ with the Gemini Multi Object Spectrometers on the Gemini North and South telescopes, the largest publicly available sample of high-quality, low-resolution spectra at these redshifts. From this homogeneous data set, we generated stacked quasar spectra in three redshift intervals at $z\sim 5$. We have modelled the flux below the rest-frame Lyman limit ($λ_\mathrm{r}<912$Å) to assess the mean free path $λ_\mathrm{mfp}^{912}$ of the intergalactic medium to HI-ionizing radiation. At mean redshifts $z_\mathrm{q}=4.56$, 4.86 and 5.16, we measure $λ_\mathrm{mfp}^{912}=(22.2\pm 2.3, 15.1\pm 1.8, 10.3\pm 1.6)h_{70}^{-1}$ proper Mpc with uncertainties dominated by sample variance. Combining our results with $λ_\mathrm{mfp}^{912}$ measurements from lower redshifts, the data are well modelled by a simple power-law $λ_\mathrm{mfp}^{912}=A[(1+z)/5]^η$ with $A=(37\pm 2)h_{70}^{-1}$ Mpc and $η= -5.4\pm 0.4$ between $z=2.3$ and $z=5.5$. This rapid evolution requires a physical mechanism -- beyond cosmological expansion -- which reduces the cosmic effective Lyman limit opacity. We speculate that the majority of HI Lyman limit opacity manifests in gas outside galactic dark matter haloes, tracing large-scale structures (e.g. filaments) whose average density (and consequently neutral fraction) decreases with cosmic time. Our measurements of the strongly redshift-dependent mean free path shortly after the completion of HI reionization serve as a valuable boundary condition for numerical models thereof. Having measured $λ_\mathrm{mfp}^{912}\approx 10$ Mpc at $z=5.2$, we confirm that the intergalactic medium is highly ionized by that epoch and that the redshift evolution of the mean free path does not show a break that would indicate a recent end to HI reionization.
description: 16 pages, 11 figures, plus 20 pages of online material; submitted to MNRAS
Reversible Dynamics in Strongly Non-Local Boxworld Systems
Creators: name: Al-Safi, Sabri W.
name: Short, Anthony J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81P16

description: In order to better understand the structure of quantum theory, or speculate about theories that may supercede it, it can be helpful to consider alternative physical theories. ``Boxworld'' describes one such theory, in which all non-signaling correlations are achievable. In a limited class of multipartite Boxworld systems - wherein all subsystems are identical and all measurements have the same number of outcomes - it has been demonstrated that the set of reversible dynamics is `trivial', generated solely by local relabellings and permutations of subsystems. We develop the convex formalism of Boxworld to give an alternative proof of this result, then extend this proof to all multipartite Boxworld systems, and discuss the potential relevance to other theories. These results lend further support to the idea that the rich reversible dynamics in quantum theory may be the key to understanding its structure and its informational capabilities.
description: 5 pages + appendices
Intelligent radiative thermostat induced by near-field radiative thermal diode
Creators: name: Liu, Yang
name: Antezza, Mauro
name: Zheng, Yi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: A radiative thermostat system senses its own temperature and automatically modulates heat transfer by turning on/off the cooling to maintain its temperature near a desired set point. Taking advantage of far- and near-field radiative thermal technologies, we propose an intelligent radiative thermostat induced by the combination of passive radiative cooling and near-field radiative thermal diode for thermal regulation at room temperature. The top passive radiative cooler in thermostat system with static thermal emissivity uses the cold outer space to passively cool itself all day, which can provide the bottom structure with the sub-ambient cold source. Meanwhile, using the phase-transition material vanadium dioxide, the bottom structure forms a near-field radiative thermal diode with the top cooler, which can significantly regulate the heat transfer between two terminals of the diode and then realize a stable temperature of the bottom structure. Besides, the backsided heat input of the thermostat has been taken into account according to real-world applications. Thermal performance of the proposed radiative thermostat design has been analyzed, showing that the coupling effect of static passive radiative cooling and dynamic internal heat transfer modulation can maintain an equilibrium temperature approximately locked within the phase transition region. Besides, after considering empirical indoor-to-outdoor heat flux, rendering its thermal performance closer to that of passive solar residential building walls, the calculation result proves that the radiative thermostat system can effectively modulate the temperature and stabilize it within a controllable range. Passive radiative thermostats driven by near-field radiative thermal diode can potentially enable intelligent temperature regulation technologies, for example, to moderate diurnal temperature in regions with extreme thermal swings.
ProFaaStinate: Delaying Serverless Function Calls to Optimize Platform Performance
Creators: name: Schirmer, Trever
name: Carl, Valentin
name: Pfandzelter, Tobias
name: Bermbach, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Function-as-a-Service (FaaS) enables developers to run serverless applications without managing operational tasks. In current FaaS platforms, both synchronous and asynchronous calls are executed immediately. In this paper, we present ProFaaStinate, which extends serverless platforms to enable delayed execution of asynchronous function calls. This allows platforms to execute calls at convenient times with higher resource availability or lower load. ProFaaStinate is able to optimize performance without requiring deep integration into the rest of the platform, or a complex systems model. In our evaluation, our prototype built on top of Nuclio can reduce request response latency and workflow duration while also preventing the system from being overloaded during load peaks. Using a document preparation use case, we show a 54% reduction in average request response latency. This reduction in resource usage benefits both platforms and users as cost savings.
description: Accepted for publication in Proc. of 9th International Workshop on Serverless Computing (WoSC 23)
Additional file 2 of Humans-livestock predators conflict in the Central and Eastern Part of Bale Mountains National Park, Ethiopia
Creators: name: Sebsibe, Israel
Publisher: name: figshare
Year: 2022
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Additional file 2. Photographs. In this file, photographs of injured and killed livestock are included. Furthermore, local communities have been expanding their activities in different forms. Some of the activities were captured and included in the file to evidence the results of the present study. Additional photographs that were obtained from the Park’s administration database are also included.
Getting a Grip on the Transverse Motion in a Zeeman Decelerator
Creators: name: Dulitz, Katrin
name: Motsch, Michael
name: Vanhaecke, Nicolas
name: Softley, Timothy P.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Zeeman deceleration is an experimental technique in which inhomogeneous, time-dependent magnetic fields generated inside an array of solenoid coils are used to manipulate the velocity of a supersonic beam. A 12-stage Zeeman decelerator has been built and characterized using hydrogen atoms as a test system. The instrument has several original features including the possibility to replace each deceleration coil individually. In this article, we give a detailed description of the experimental setup, and illustrate its performance. We demonstrate that the overall acceptance in a Zeeman decelerator can be significantly increased with only minor changes to the setup itself. This is achieved by applying a rather low, anti-parallel magnetic field in one of the solenoid coils that forms a temporally varying quadrupole field, and improves particle confinement in the transverse direction. The results are reproduced by three-dimensional numerical particle trajectory simulations thus allowing for a rigorous analysis of the experimental data. The findings suggest the use of a modified coil configuration to improve transverse focusing during the deceleration process.
description: accepted by J. Chem. Phys
Evidence of $q$-exponential statistics in Greek seismicity
Creators: name: Antonopoulos, Chris G.
name: Michas, George
name: Vallianatos, Filippos
name: Bountis, Tassos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the seismicity (global seismic activity) that occurred in Greece between 1976 and 2009 based on the dataset reported in Makropoulos et al., 2012, using concepts of Non-extensive Statistical Physics. By considering the entire and declustered datasets, for which the aftershocks have been removed, we initially investigate the frequency-magnitude distribution and find that both datasets are well approximated by a physical model derived in the framework of Non-extensive Statistical Physics. We then carry out a study of the distribution of interevent times of seismic events for different magnitude thresholds and discover that the data are well approximated by a statistical distribution of the $q$-exponential type that allows us to compute analytically the hazard function of earthquake production. Our analysis thus reveals further evidence that the underlying dynamical process of earthquake birth reflects a kind of nonlinear memory due to long-term persistence of seismic events.
description: 19 pages, 4 figures, published in Physica A: Statistical Mechanics and its Applications
Shell-model study of $β^+$/EC-decay half-lives for $Z = 21-30$ nuclei
Creators: name: Kumar, Vikas
name: Srivastava, Praveen C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In the present work, we have reported $β^+$/EC-decay half-lives for $Z = 21 -30$ nuclei using large-scale shell-model. %and N $\leq$ A recent study shows that some proton-rich nuclei in this region belong to the island of inversion. We have performed calculations for these nuclei using KB3G effective interaction, while for Ni, Cu, and Zn nuclei we have used JUN45 effective interaction in the $f_{5/2}pg_{9/2}$ model space. The calculated quenching factors for $fp$ and $f_{5/2}pg_{9/2}$ space using KB3G and JUN45 effective interactions are also reported. Shell-model results of $β$-decay half-lives, excitation energies, log$ft$ values, and branching fractions are discussed and compared with the available experimental data. We have obtained a reasonable agreement with the available data.
description: 12 pages, 4 figures, 4 Tables, The European Physical Journal A : Hadrons and Nuclei (2023)
Additional file 1 of Systematic comparation of the biological and transcriptomic landscapes of human amniotic mesenchymal stem cells under serum-containing and serum-free conditions
Creators: name: Sun, Yunyan
name: Wang, Ti-er
name: Hu, Qianwen
name: Zhang, Wenxia
name: Zeng, Yun
name: Lai, Xun
name: Zhang, Leisheng
name: Shi, Mingxia
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Figure S1. Cell vitality assay of hAMSCs with PI3K-AKT-mTOR signal reactivation and tumorigenicity assay.
Homeless service users’ experiences of empowerment and actualisation in homeless service settings
Creators: name: O'Shaughnessy, Branagh R.
Publisher: name: University of Limerick
Year: 2022
Subjects: subject: Psychology
subject: FOS: Psychology

description: The stress and severe situational constraints associated with experiences of homelessness can lead to feelings of disempowerment. Although homeless services have the potential to restore service users’ empowerment, mainstream homeless service structures continue to reinforce a sense of powerlessness. In this research I combined a theory of empowering services with the capabilities approach to identify features of homeless services that influence service users’ empowerment. The project is composed of three studies: a systematic review and narrative synthesis of empowering homeless interventions, a focus group discussion of Irish homeless service users’ empowering and actualising experiences, and a semi-structured interview inquiry of service users’ central capabilities in eight European countries. Qualitative accounts were collected and compared via thematic analyses. Findings from the systematic review indicated that empowering supported housing, case management, and skills and knowledge acquisition interventions effectively contribute to outcomes aligned with emotional and behavioural empowerment, and their relational antecedents. Themes garnered from the qualitative studies indicate that the physical and affective dimensions of home, service support orientation, and relational well-being and positive community interaction shape service users’ empowering and disempowering experiences. Findings from this research identify the organisational and systemic barriers that must be removed to support individual exits from homelessness and highlights service aspects that can be bolstered to improve the empowering experiences of service users. This programme of research produced findings that support policy and service delivery approaches that prioritise housing-led person-centred supports over authoritarian style service environments that undermine the development of service users’ empowerment.
Weighing the Neutrino
Creators: name: Jentschura, U. D.
name: Horvath, D.
name: Nagy, S.
name: Nandori, I.
name: Trocsanyi, Z.
name: Ujvari, B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the potential of short-baseline experiments in order to measure the dispersion relation of the (muon) neutrino, with a prospect of eventually measuring the neutrino mass. As a byproduct, the experiment would help to constrain parameters of Lorentz-violating effects in the neutrino sector. The potential of a high-flux laser-accelerated proton beam (e.g., at the upcoming ELI facility), incident on a thick target composed of a light element to produce pions, with a subsequent decay to muons and muon-neutrinos, is discussed. We find a possibility for a muon neutrino mass measurement of unprecedented accuracy.
description: 12 pages; RevTeX
The distribution of shortest path lengths on trees of a given size in subcritical Erdos-Renyi networks
Creators: name: Budnick, Barak
name: Biham, Ofer
name: Katzav, Eytan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In the subcritical regime Erdős-Rényi (ER) networks consist of finite tree components, which are non-extensive in the network size. The distribution of shortest path lengths (DSPL) of subcritical ER networks was recently calculated using a topological expansion [E. Katzav, O. Biham and A.K. Hartmann, Phys. Rev. E 98, 012301 (2018)]. The DSPL, which accounts for the distance $\ell$ between any pair of nodes that reside on the same finite tree component, was found to follow a geometric distribution of the form $P(L=\ell | L < \infty) = (1-c) c^{\ell - 1}$, where $0 < c < 1$ is the mean degree of the network. This result includes the contributions of trees of all possible sizes and topologies. Here we calculate the distribution of shortest path lengths $P(L=\ell | S=s)$ between random pairs of nodes that reside on the same tree component of a given size $s$. It is found that $P(L=\ell | S=s) = \frac{\ell+1}{s^{\ell}} \frac{(s-2)!}{(s-\ell-1)!}$. Surprisingly, this distribution does not depend on the mean degree $c$ of the network from which the tree components were extracted. This is due to the fact that the ensemble of tree components of a given size $s$ in subcritical ER networks is sampled uniformly from the set of labeled trees of size $s$ and thus does not depend on $c$. The moments of the DSPL are also calculated. It is found that the mean distance between random pairs of nodes on tree components of size $s$ satisfies ${\mathbb E}[L|S=s] \sim \sqrt{s}$, unlike small-world networks in which the mean distance scales logarithmically with $s$.
description: 29 pages, 7 figures. arXiv admin note: text overlap with arXiv:1806.05743
ניסויית 2023
Creators: name: Mansour, Mera Abu
name: Muallem, Mirna
name: Farah, Almira
Publisher: name: Open Science Framework
Year: 2023
Subjects: subject: Physiology
subject: FOS: Biological sciences
subject: Life Sciences

description: זוהי ההרשמה מראש למחקר שלנו, במסגרת קורס פסיכולוגיה ניסויית
Additional file 2 of Systematic comparation of the biological and transcriptomic landscapes of human amniotic mesenchymal stem cells under serum-containing and serum-free conditions
Creators: name: Sun, Yunyan
name: Wang, Ti-er
name: Hu, Qianwen
name: Zhang, Wenxia
name: Zeng, Yun
name: Lai, Xun
name: Zhang, Leisheng
name: Shi, Mingxia
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2. Figure S2: Comparation of the T cells after coculturing with or without hAMSCs pretreated in SC and SF conditions.
MPEC 2023-G13 : DAILY ORBIT UPDATE (2023 April 1)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
The Coexistence and Decoupling of Bulk and Edge States in Disordered Two-dimensional Topological Insulators
Creators: name: Zhang, Yan-Yang
name: Shen, Man
name: An, Xing-Tao
name: Sun, Qing-Feng
name: Xie, Xin-Cheng
name: Chang, Kai
name: Li, Shu-Shen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the scattering and localization properties of edge and bulk states in a disordered two-dimensional topological insulator when they coexist at the same fermi energy. Due to edge-bulk backscattering (which is not prohibited \emph{a priori} by topology or symmetry), Anderson disorder makes the edge and bulk states localized indistinguishably. Two methods are proposed to effectively decouple them and to restore robust transport. The first kind of decouple is from long range disorder, since edge and bulk states are well separated in $k$ space. The second one is from an edge gating, owing to the edge nature of edge states in real space. The latter can be used to electrically tune a system between an Anderson insulator and a topologically robust conductor, i.e., a realization of a topological transistor.
description: 5 pages, 4 figures
Manipulation of magnetic topological textures via perpendicular strain and polarization in van der Waals magnetoelectric heterostructure
Creators: name: Shen, Zhong
name: Dong, Shuai
name: Yao, Xiaoyan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Multi-functional manipulation of magnetic topological textures such as skyrmions and bimerons in energy-efficient ways is of great importance for spintronic applications, but still being a big challenge. Here, by first-principles calculations and atomistic simulations, the creation and annihilation of skyrmions/bimerons, as key operations for the reading and writing of information in spintronic devices, are achieved in van der Waals magnetoelectric CrISe/In2Se3 heterostructure via perpendicular strain or electric field without external magnetic field. Besides, the bimeron-skyrmion conversion, size modulation and the reversible magnetization switching from in-plane to out-of-plane could also be realized in magnetic-field-free ways. Moreover, the topological charge and morphology can be precisely controlled by a small magnetic field. The strong Dzyaloshinskii-Moriya interaction and tunable magnetic anisotropy energy in a wide window are found to play vital roles in such energy efficient multi-functional manipulation, and the underlying physical mechanisms are elucidated. Our work predicts the CrISe/In2Se3 heterostructure being an ideal platform to address this challenge in spintronic applications, and theoretically guides the low-dissipation multi-functional manipulation of magnetic topological textures.
description: 7 pages, 5 figures
Application of Pseudo-Transient Continuation Method in Dynamic Stability Analysis
Creators: name: Wang, Xiaozhe
name: Chiang, Hsiao-Dong
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, pseudo-transient continuation method has been modified and implemented in power system long-term stability analysis. This method is a middle ground between integration and steady state calculation, thus is a good compromise between accuracy and efficiency. Pseudo-transient continuation method can be applied in the long-term stability model directly to accelerate simulation speed and can also be implemented in the QSS model to overcome numerical difficulties. Numerical examples show that pseudo-transient continuation method can provide correct approximations for the long-term stability model in terms of trajectories and stability assessment.
description: This paper has been accepted by IEEE PES general meeting, 2014
Periodic massloss from viscous accretion flows around black holes
Creators: name: Das, Santabrata
name: Chattopadhyay, Indranil
name: Nandi, Anuj
name: Molteni, Diego
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the behaviour of low angular momentum viscous accretion flows around black holes using Smooth Particle Hydrodynamics (SPH) method. Earlier, it has been observed that in a significant part of the energy and angular momentum parameter space, rotating transonic accretion flow undergoes shock transition before entering in to the black hole and a part of the post-shock matter is ejected as bipolar outflows, which are supposed to be the precursor of relativistic jets. In this work, we simulate accretion flows having injection parameters from the inviscid shock parameter space, and study the response of viscosity on them. With the increase of viscosity, shock becomes time dependent and starts to oscillate when the viscosity parameter crosses its critical value. As a result, the in falling matter inside the post-shock region exhibits quasi-periodic variations and causes periodic ejection of matter from the inner disc as outflows. In addition, the same hot and dense post-shock matter emits high energy radiation and the emanating photon flux also modulates quasi-periodically. Assuming a ten solar mass black hole, the corresponding power density spectrum peaks at the fundamental frequency of few Hz followed by multiple harmonics. This feature is very common in several outbursting black hole candidates. We discuss the implications of such periodic variations.
description: 9 pages, 7 figures, Accepted in MNRAS
Additional file 3 of Systematic comparation of the biological and transcriptomic landscapes of human amniotic mesenchymal stem cells under serum-containing and serum-free conditions
Creators: name: Sun, Yunyan
name: Wang, Ti-er
name: Hu, Qianwen
name: Zhang, Wenxia
name: Zeng, Yun
name: Lai, Xun
name: Zhang, Leisheng
name: Shi, Mingxia
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 3. Figure S3. Comparation of the inhibitory effects of hAMSCs pretreated in SC and SF conditions upon T cells.
Solving Travelling Thief Problems using Coordination Based Methods
Creators: name: Namazi, Majid
name: Newton, M. A. Hakim
name: Sanderson, Conrad
name: Sattar, Abdul
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: 68T20, 90B06, 90C27, 90C59

description: A travelling thief problem (TTP) is a proxy to real-life problems such as postal collection. TTP comprises an entanglement of a travelling salesman problem (TSP) and a knapsack problem (KP) since items of KP are scattered over cities of TSP, and a thief has to visit cities to collect items. In TTP, city selection and item selection decisions need close coordination since the thief's travelling speed depends on the knapsack's weight and the order of visiting cities affects the order of item collection. Existing TTP solvers deal with city selection and item selection separately, keeping decisions for one type unchanged while dealing with the other type. This separation essentially means very poor coordination between two types of decision. In this paper, we first show that a simple local search based coordination approach does not work in TTP. Then, to address the aforementioned problems, we propose a human designed coordination heuristic that makes changes to collection plans during exploration of cyclic tours. We further propose another human designed coordination heuristic that explicitly exploits the cyclic tours in item selections during collection plan exploration. Lastly, we propose a machine learning based coordination heuristic that captures characteristics of the two human designed coordination heuristics. Our proposed coordination based approaches help our TTP solver significantly outperform existing state-of-the-art TTP solvers on a set of benchmark problems. Our solver is named Cooperation Coordination (CoCo) and its source code is available from https://github.com/majid75/CoCo
description: expanded and revised version of arXiv:1911.03124
The sulphur species in hot rocky exoplanet atmospheres
Creators: name: Janssen, L. J.
name: Woitke, P.
name: Herbort, O.
name: Min, M.
name: Chubb, K. L.
name: Helling, Ch.
name: Carone, L.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: 85

description: The first JWST observations of hot Jupiters showed an unexpected detection of SO2 in their hydrogen-rich atmospheres. We investigate how much sulphur can be expected in the atmospheres of rocky exoplanets and which sulphur molecules can be expected to be most abundant and detectable by transmission spectroscopy. We run thermo-chemical equilibrium models at the crust-atmosphere interface, considering surface temperatures 500 to 5000 K, surface pressures 1 to 100 bar, and various sets of element abundances based on common rock compositions. Between 1000 K and 2000 K, we find gaseous sulphur concentrations of up to 25 percent above the rock in our models. SO2, SO, H2S and S2 are by far the most abundant sulphur molecules. SO2 shows potentially detectable features in transmission spectra at about 4 micron, between 7 and 8 micron, and beyond 15 micron. In contrast, the sometimes abundant H2S molecule is difficult to detect in these spectra, which are mostly dominated by H2O and CO2. Although the molecule PS only occurs with concentrations below 300 ppm, it can cause a strong absorption feature between 0.3 and 0.65 micron in some of our models for high surface pressures. The detection of sulphur molecules would enable a better characterisation of the planetary surface.
description: Typos have been corrected compared to version 1
Additional file 4 of Systematic comparation of the biological and transcriptomic landscapes of human amniotic mesenchymal stem cells under serum-containing and serum-free conditions
Creators: name: Sun, Yunyan
name: Wang, Ti-er
name: Hu, Qianwen
name: Zhang, Wenxia
name: Zeng, Yun
name: Lai, Xun
name: Zhang, Leisheng
name: Shi, Mingxia
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4. Figure S4. Cell growth and apoptosis of T lymphocyte subpopulations when cocultured with hAMSCs.
Additional file 5 of Systematic comparation of the biological and transcriptomic landscapes of human amniotic mesenchymal stem cells under serum-containing and serum-free conditions
Creators: name: Sun, Yunyan
name: Wang, Ti-er
name: Hu, Qianwen
name: Zhang, Wenxia
name: Zeng, Yun
name: Lai, Xun
name: Zhang, Leisheng
name: Shi, Mingxia
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 5. The details accompanied with the main manuscript including Additional Figure Legends for Figure S1-S4, Additional Table S1-S3, Additional References were listed.