cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Semi-supervised standardized detection of extrasolar planets
Creators: name: Sulis, S.
name: Mary, D.
name: Bigot, L.
name: Deleuil, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The detection of small exoplanets with the radial velocity (RV) technique is limited by various poorly known noise sources of instrumental and stellar origin. As a consequence, current detection techniques often fail to provide reliable estimates of the significance levels of detection tests (p-values). We designed an RV detection procedure that provides reliable p-value estimates while accounting for the various noise sources. The method can incorporate ancillary information about the noise (e.g., stellar activity indicators) and specific data- or context-driven data (e.g., instrumental measurements, simulations of stellar variability) . The detection part of the procedure uses a detection test that is applied to a standardized periodogram. Standardization allows an autocalibration of the noise sources with partially unknown statistics. The estimation of the p-value of the test output is based on dedicated Monte Carlo simulations that allow handling unknown parameters. The procedure is versatile in the sense that the specific pair (periodogram and test) is chosen by the user. We demonstrate by extensive numerical experiments on synthetic and real RV data from the Sun and aCenB that the proposed method reliably allows estimating the p-values. The method also provides a way to evaluate the dependence of the estimated p-values that are attributed to a reported detection on modeling errors. It is a critical point for RV planet detection at low signal-to-noise ratio to evaluate this dependence. The python algorithms are available on GitHub. Accurate estimation of p-values when unknown parameters are involved is an important but only recently addressed question in the field of RV detection. Although this work presents a method to do this, the statistical literature discussed in this paper may trigger the development of other strategies.
description: 19 pages, 11 figures, accepted to A&A
Analytical analysis of the origin of core-cusp matter density distributions in galaxies
Creators: name: Kapustin, A. D.
name: Paston, S. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose an analytical method to describe a matter density profile near a galaxy center. The description is based on the study of the distribution function of particles over possible trajectories. We establish a relation between the central slope of density profile and the near-origin behavior of the angular momentum distribution function. We consider both a spherically symmetric (on average) matter distribution as well as deviations from it. If the density profile forms in a background of spherical gravitation potential then a core-type distribution arises. A regular matter may behave in such way if the background potential was formed by the dark matter. In the presence of deviation from spherical symmetry the formation of cusp-type distribution is possible. Moreover, a reduction of spherical symmetry to the axial one leads to a less steep cusp profile. The complete symmetry breaking (which corresponds, in particular, to the common setup of numerical simulations), leads to a steeper cusp profile.
description: LaTeX, 13 pages. In this version, the study of possible deviations from spherical symmetry was added, the present version corresponds to the published one
Constraint on K Kbar compositeness of the a0(980) and f0(980) resonances from their mixing intensity
Creators: name: Sekihara, T.
name: Kumano, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Structure of the $a_{0}(980)$ and $f_{0}(980)$ resonances is investigated with the $a_{0}(980)$-$f_{0}(980)$ mixing intensity from the viewpoint of compositeness, which corresponds to the amount of two-body states composing resonances as well as bound states. For this purpose we first formulate the $a_{0}(980)$-$f_{0}(980)$ mixing intensity as the ratio of two partial decay widths of a parent particle, in the same manner as the recent analysis in BES experiments. Calculating the $a_{0}(980)$-$f_{0}(980)$ mixing intensity with the existing Flatte parameters from experiments, we find that many combinations of the $a_{0}(980)$ and $f_{0}(980)$ Flatte parameters can reproduce the experimental value of the $a_{0}(980)$-$f_{0}(980)$ mixing intensity by BES. Next, from the same Flatte parameters we also calculate the $K \bar{K}$ compositeness for $a_{0}(980)$ and $f_{0}(980)$. Although the compositeness with the correct normalization becomes complex in general for resonance states, we find that the Flatte parameters for $f_{0}(980)$ imply large absolute value of the $K \bar{K}$ compositeness and the parameters for $a_{0}(980)$ lead to small but nonnegligible absolute value of the $K \bar{K}$ compositeness. Then, connecting the mixing intensity and the $K \bar{K}$ compositeness via the $a_{0}(980)$- and $f_{0}(980)$-$K \bar{K}$ coupling constants, we establish a relation between them. As a result, a small mixing intensity indicates a small value of the product of the $K \bar{K}$ compositeness for the $a_{0}(980)$ and $f_{0}(980)$ resonances. Moreover, the experimental value of the $a_{0}(980)$-$f_{0}(980)$ mixing intensity implies that the $a_{0}(980)$ and $f_{0}(980)$ resonances cannot be simultaneously $K \bar{K}$ molecular states.
description: 15 pages, 6 figures, version accepted for publication in PRD
title: Σχεδιασμός δικτύων σωληνώσεων με εφαρμογές σε τρισδιάστατο περιβάλλον
title: Piping systems design and applications using 3D CAD software
Creators: name: Γαλλος Νικολαος
Publisher: name: Technical University of Crete
Year: 2023

description: Σκοπός της παρούσας διπλωματική εργασίας, είναι η ανάλυση της διαδικασίας σχεδιασμού σωληνώσεων σε τρισδιάστατο περιβάλλον. Παρουσιάζονται τα σημαντικότερα μέρη των δικτύων σωληνώσεων ενώ στη συνέχεια αναλύονται οι αρχές που ακολουθεί ένας μηχανικός πριν το σχεδιασμό. Ο σχεδιασμός των δικτύων σωληνώσεων γίνεται με τη χρήση της εφαρμογής Tube and Pipe του προγράμματος Inventor της Autodesk και η εργασία εξερευνά τις δυνατότητες της εφαρμογής μέσω παραδειγμάτων και καταλήγει στο σχεδιασμό και στην κατασκευή μιας βιομηχανικής εγκατάστασης.
A method of deforming G-structures
Creators: name: Bunk, Severin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider deformations of G-structures via the right action on the frame bundle in a base-point-dependent manner. We investigate which of these deformations again lead to G-structures and in which cases the original and the deformed G-structures define the same instantons. Further, we construct a bijection from connections compatible with the original G-structure to those compatible with the deformed G-structure and investigate the change of intrinsic torsion under the aforementioned deformations. Finally, we consider several examples.
description: 14 pages; v3: references added, published in Journal of Geometry and Physics
Fermionic Symmetry Protected Topological Phases and Cobordisms
Creators: name: Kapustin, Anton
name: Thorngren, Ryan
name: Turzillo, Alex
name: Wang, Zitao
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has been proposed recently that interacting Symmetry Protected Topological (SPT) phases can be classified using cobordism theory. We test this proposal in the case of fermionic SPT phases with Z/2 symmetry, where Z/2 is either time-reversal or an internal symmetry. We find that cobordism classification correctly describes all known fermionic SPT phases in space dimension less than or equal to 3 and also predicts that all such phases can be realized by free fermions. In higher dimensions we predict the existence of inherently interacting fermionic SPT phases.
description: 26 pages, new references added and a new section on decorated domain walls in v2
Maximin effects in inhomogeneous large-scale data
Creators: name: Meinshausen, Nicolai
name: Bühlmann, Peter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Large-scale data are often characterized by some degree of inhomogeneity as data are either recorded in different time regimes or taken from multiple sources. We look at regression models and the effect of randomly changing coefficients, where the change is either smoothly in time or some other dimension or even without any such structure. Fitting varying-coefficient models or mixture models can be appropriate solutions but are computationally very demanding and often return more information than necessary. If we just ask for a model estimator that shows good predictive properties for all regimes of the data, then we are aiming for a simple linear model that is reliable for all possible subsets of the data. We propose the concept of "maximin effects" and a suitable estimator and look at its prediction accuracy from a theoretical point of view in a mixture model with known or unknown group structure. Under certain circumstances the estimator can be computed orders of magnitudes faster than standard penalized regression estimators, making computations on large-scale data feasible. Empirical examples complement the novel methodology and theory.
description: Published at http://dx.doi.org/10.1214/15-AOS1325 in the Annals of Statistics (http://www.imstat.org/aos/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Diffusion For Ensembles of Standard Maps
Creators: name: Alus, Or
name: Fishman, Shmuel
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Two types of random evolution processes are studied for ensembles of the standard map with driving parameter $K$ that determines its degree of stochasticity. For one type of processes the parameter $K$ is chosen at random from a Gaussian distribution and is then kept fixed, while for the other type it varies from step to step. In addition, noise that can be arbitrarily weak is added. The ensemble average and the average over noise of the diffusion coefficient is calculated for both types of processes. These two types of processes are relevant for two types of experimental situations as explained in the paper. Both types of processes destroy fine details of the dynamics, and the second process is found to be more effective in destroying the fine details. We hope that this work is a step in the efforts for developing a statistical theory for systems with mixed phase space (regular in some parts and chaotic in other parts).
Interpretation of scanning tunneling quasiparticle interference and impurity states in cuprates
Creators: name: Kreisel, A.
name: Choubey, Peayush
name: Berlijn, T.
name: Andersen, B. M.
name: Hirschfeld, P. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We apply a recently developed method combining first principles based Wannier functions with solutions to the Bogoliubov-de Gennes equations to the problem of interpreting STM data in cuprate superconductors. We show that the observed images of Zn on the surface of Bi$_2$Sr$_2$CaCu$_2$O$_8$ can only be understood by accounting for the tails of the Cu Wannier functions, which include significant weight on apical O sites in neighboring unit cells. This calculation thus puts earlier crude "filter" theories on a microscopic foundation and solves a long standing puzzle. We then study quasiparticle interference phenomena induced by out-of-plane weak potential scatterers, and show how patterns long observed in cuprates can be understood in terms of the interference of Wannier functions above the surface. Our results show excellent agreement with experiment and enable a better understanding of novel phenomena in the cuprates via STM imaging.
description: 5 pages, 5 figures, published version (Supplemental Material: 5 pages, 11 figures) for associated video file, see http://itp.uni-frankfurt.de/~kreisel/QPI_BSCCO_BdG_p_W.mp4
The effects of vitamin C and E on exercise-induced physiological adaptations: a systematic review and Meta-analysis of randomized controlled trials
Creators: name: Clifford, Tom
name: Jeffries, Owen
name: Stevenson, Emma J.
name: Davies, Kelly A. Bowden
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences

description: We conducted a systematic review and meta-analysis of randomized controlled trials examining the effect of vitamin C and/or E on exercise-induced training adaptations. Medline, Embase and SPORTDiscus databases were searched for articles from inception until June 2019. Inclusion criteria was studies in adult humans where vitamin C and/or E had to be consumed alongside a supervised exercise training program of ≥4 weeks. Nine trials were included in the analysis of aerobic exercise adaptations and nine for resistance training (RT) adaptations. Vitamin C and/or E did not attenuate aerobic exercise induced improvements in maximal aerobic capacity (V̇O2max) (SMD −0.14, 95% CI: −0.43 to 0.15, P = 0.35) or endurance performance (SMD −0.01, 95% CI: −0.38 to 0.36, P = 0.97). There were also no effects of these supplements on lean mass and muscle strength following RT (SMD −0.07, 95% CI: −0.36 to 0.23, P = 0.67) and (SMD −0.15, 95% CI: −0.16 to 0.46, P = 0.35), respectively. There was also no influence of age on any of these outcomes (P > 0.05). These findings suggest that vitamin C and/or E does not inhibit exercise-induced changes in physiological function. Studies with larger sample sizes and adequate power are still required.
title: Far-Right Local Governments and Civil Society: Findings from France and Italy
Creators: name: Kim, Seongcheol
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: civil society
subject: far right
subject: France
subject: Italy
subject: local government
subject: trade unions
subject: 320
subject: Frankreich
subject: Italien
subject: Zivilgesellschaft
subject: Rechtsradikalismus
subject: Local government
subject: Gewerkschaft

description: Gefördert im Rahmen eines Open-Access-Transformationsvertrags mit dem Verlag
Mode Control of Electro-Magnetic Pulses in the VHF Band
Creators: name: Ehret, M.
name: Volpe, L.
name: Apiñaniz, J. I.
name: Puyuelo-Valdes, P.
name: Gatti, G.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We present experimental results for the controlled mitigation of electromagnetic pulses (EMP) produced in interactions of the 1PW high-power 30fs Ti:Sa laser VEGA-3 with matter. This study aims at the band of very high frequencies (VHF), notably hundreds of MHz, comprising the fundamental cavity modes of the rectangular VEGA-3 vacuum chamber. We demonstrate mode suppression by tailoring of the laser-produced space charge distribution.
description: submitted to the proceedings of the 48th EPS Conference on Plasma Physics
A Data-Driven Approach for Tag Refinement and Localization in Web Videos
Creators: name: Ballan, Lamberto
name: Bertini, Marco
name: Serra, Giuseppe
name: Del Bimbo, Alberto
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Information Retrieval (cs.IR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: Tagging of visual content is becoming more and more widespread as web-based services and social networks have popularized tagging functionalities among their users. These user-generated tags are used to ease browsing and exploration of media collections, e.g. using tag clouds, or to retrieve multimedia content. However, not all media are equally tagged by users. Using the current systems is easy to tag a single photo, and even tagging a part of a photo, like a face, has become common in sites like Flickr and Facebook. On the other hand, tagging a video sequence is more complicated and time consuming, so that users just tag the overall content of a video. In this paper we present a method for automatic video annotation that increases the number of tags originally provided by users, and localizes them temporally, associating tags to keyframes. Our approach exploits collective knowledge embedded in user-generated tags and web sources, and visual similarity of keyframes and images uploaded to social sites like YouTube and Flickr, as well as web sources like Google and Bing. Given a keyframe, our method is able to select on the fly from these visual sources the training exemplars that should be the most relevant for this test sample, and proceeds to transfer labels across similar images. Compared to existing video tagging approaches that require training classifiers for each tag, our system has few parameters, is easy to implement and can deal with an open vocabulary scenario. We demonstrate the approach on tag refinement and localization on DUT-WEBV, a large dataset of web videos, and show state-of-the-art results.
description: Preprint submitted to Computer Vision and Image Understanding (CVIU)
Ο ρόλος του νοσηλευτή στα χειρουργεία
Creators: name: Θωμαΐδου, Δήμητρα Συμεών
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Νοσηλευτής
Χειρουργείο
Χειρουργικά Στάδια
Nurse
Operating Room
Surgical Stages

description: Στην παρούσα εργασία, πραγματοποιείται μία βιβλιογραφική ανασκόπηση, με την οποία επιδιώκεται η ανάδειξη του ρόλου που αναλαμβάνει ο νοσηλευτής στο χειρουργείο. Η σπουδαιότητα του ρόλου του έγκειται στο γεγονός ότι οι αρμοδιότητές του σε όλα τα στάδια της εγχειρητικής διαδικασίας είναι πρώτα από όλα διευρυμένες και καθόλου μονοδιάστατες. Ακόμα, αποτελεί αναπόσπαστο μέρος της χειρουργικής ομάδας από όποια ιεραρχική θέση και να τοποθετείται. Για αυτό το λόγο, καλείται να έχει συγκεκριμένες δεξιότητες και κυρίως την ικανότητα να εργάζεται σε ένα ομαδικό περιβάλλον, προάγοντας τη συνεργασία και το σεβασμό τόσο απέναντι στους συναδέλφους του όσο και στον ίδιο τον ασθενή.
description: In this report, a bibliographic review is carried out to highlight the role that the nurse holds in the operating room. The importance of this role lies in the fact that his responsibilities at all stages of the operative process are expanded and not one-dimensional. Also, he is an integral part of the surgical team from whatever hierarchical position he is placed in. Consequently, it is expected for the nurse to have specific skills and mainly the ability to work in a team environment, promoting cooperation and respect for both his colleagues and the patient himself.
Controlling Andreev bound states with the magnetic vector potential
Creators: name: Moehle, Christian M.
name: Rout, Prasanna K.
name: Jainandunsing, Nayan A.
name: Kuiri, Dibyendu
name: Ke, Chung Ting
name: Xiao, Di
name: Thomas, Candice
name: Manfra, Michael J.
name: Nowak, Michal P.
name: Goswami, Srijit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Tunneling spectroscopy measurements are often used to probe the energy spectrum of Andreev bound states (ABSs) in semiconductor-superconductor hybrids. Recently, this spectroscopy technique has been incorporated into planar Josephson junctions (JJs) formed in two-dimensional electron gases, a potential platform to engineer phase-controlled topological superconductivity. Here, we perform ABS spectroscopy at the two ends of planar JJs and study the effects of the magnetic vector potential on the ABS spectrum. We show that the local superconducting phase difference arising from the vector potential is equal in magnitude and opposite in sign at the two ends, in agreement with a model that assumes localized ABSs near the tunnel barriers. Complemented with microscopic simulations, our experiments demonstrate that the local phase difference can be used to estimate the relative position of localized ABSs separated by a few hundred nanometers.
Electric Field-Induced Skyrmion Crystals via Charged Monopoles in Insulating Helimagets
Creators: name: Watanabe, Haruki
name: Vishwanath, Ashvin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Electrons propagating in a magnetically ordered medium experience an additional gauge field associated with the Berry phase of their spin following the local magnetic texture. In contrast to the usual electromagnetic field, this gauge field admits monopole excitations, corresponding to hedgehog defects of the magnetic order. In an insulator, these hedgehogs carry a well-defined electric charge allowing for them to be controlled by electric fields. One particularly robust mechanism that contributes to the charge is the orbital magnetoelectric effect, captured by a $θ$ angle, which leads to a charge of $eθ/2π$ on hedgehogs. This is a direct consequence of the Witten effect for magnetic monopoles in a $θ$ medium. A physical consequence is that external electric fields can induce skyrmion crystal phases in insulating helimagnets.
description: 6 pages, 6 figures; v2: minor changes
Statics and dynamics of selfish interactions in distributed service systems
Creators: name: Altarelli, F.
name: Braunstein, A.
name: Dall'Asta, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Multiagent Systems (cs.MA)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We study a class of games which model the competition among agents to access some service provided by distributed service units and which exhibit congestion and frustration phenomena when service units have limited capacity. We propose a technique, based on the cavity method of statistical physics, to characterize the full spectrum of Nash equilibria of the game. The analysis reveals a large variety of equilibria, with very different statistical properties. Natural selfish dynamics, such as best-response, usually tend to large-utility equilibria, even though those of smaller utility are exponentially more numerous. Interestingly, the latter actually can be reached by selecting the initial conditions of the best-response dynamics close to the saturation limit of the service unit capacities. We also study a more realistic stochastic variant of the game by means of a simple and effective approximation of the average over the random parameters, showing that the properties of the average-case Nash equilibria are qualitatively similar to the deterministic ones.
description: 30 pages, 10 figures
The buildup of galaxies and their spheroids: the contributions of mergers, disc instabilities and star formation
Creators: name: Huško, Filip
name: Lacey, Cedric G.
name: Baugh, Carlton M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We use the GALFORM semi-analytical model of galaxy formation and the Planck-Millennium simulation to investigate the origins of stellar mass in galaxies and their spheroids. We compare the importance of mergers and disc instabilities, as well as the starbursts that they trigger. We find that the fraction of galaxy stellar mass formed \textit{ex situ} ($f_\mathrm{ex}$) increases sharply from $M_*=10^{11}$ M$_\odot$ upwards, reaching $80\%$ at $M_*=10^{11.3}$ M$_\odot$. For low-mass galaxies we find larger \textit{\textit{ex situ}} contributions at $z=0$ than in other models ($7$-$12\%$), with a decrease towards higher redshifts. The global \textit{ex situ} fraction of all stellar mass falls sharply with redshift, from $40\%$ at $z=0$ to $3\%$ at $z=10$. Major mergers contribute roughly half of the \textit{ex situ} mass, with minor mergers and smooth accretion of satellites both accounting for $\approx25\%$, almost independent of stellar mass and redshift. Mergers dominate in building up high-mass ($M_\mathrm{*,sph}>10^{11}$ M$_\odot$) and low-mass ($M_\mathrm{*,sph}<10^{8.5}$ M$_\odot$) spheroids. Disc instabilities and their associated starbursts dominate for intermediate-mass spheroids ($10^{8.5}
description: Accepted for publication in MNRAS
Complex organic molecules detected in twelve high-mass star-forming regions with Atacama Large Millimeter/submillimeter Array (ALMA)
Creators: name: Baek, Giseon
name: Lee, Jeong-Eun
name: Hirota, Tomoya
name: Kim, Kee-Tae
name: Kim, Mi Kyoung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent astrochemical models and experiments have explained that complex organic molecules (COMs; molecules composed of six or more atoms) are produced on the dust grain mantles in cold and dense gas in prestellar cores. However, the detailed chemical processes and the roles of physical conditions on chemistry are still far from understood. To address these questions, we investigated twelve high-mass star-forming regions using the ALMA band 6 observations. They are associated with 44/95GHz class I and 6.7 GHz class II CH$_{3}$OH masers, indicative of undergoing active accretion. We found 28 hot cores with COMs emission among 68 continuum peaks at 1.3 mm and specified 10 hot cores associated with 6.7 GHz class II CH$_{3}$OH masers. Up to 19 COMs are identified including oxygen- and nitrogen-bearing molecules and their isotopologues in cores. The derived abundances show a good agreement with those from other low- and high-mass star-forming regions, implying that the COMs chemistry is predominantly set by the ice chemistry in the prestellar core stage. One clear trend is that the COMs detection rate steeply grows with the gas column density, which can be attributed to the efficient formation of COMs in dense cores. In addition, cores associated with a 6.7 GHz class II CH$_{3}$OH maser tend to be enriched with COMs. Finally, our results suggest that the enhanced abundances of several molecules in our hot cores could be originated by the active accretion as well as different physical conditions of cores.
description: 72 pages, 71 figures, 7 tables, accepted for publication in ApJ
Decay behaviors of the fully-bottom and fully-charm tetraquark states
Creators: name: Chen, Hua-Xing
name: Yan, Yi-Xin
name: Chen, Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the decay behaviors of the fully-bottom tetraquark states within the diquark-antidiquark picture, and calculate their relative branching ratios through the Fierz rearrangement. Our results suggest that the $C=+$ states can be searched for in the $μ^+ μ^- Υ(1S)$ and $μ^+ μ^- Υ(2S)$ channels with the relative branching ratio $\mathcal{B}(X \to μμΥ(2S)) / \mathcal{B}(X \to μμΥ(1S)) \approx 0.4$. Our results also suggest that the $C=-$ states can be searched for in the $μ^+ μ^- η_b(1S)$ and $μ^+ μ^- η_b(2S)$ channels with the similar relative branching ratio $\mathcal{B}(X \to μμη_b(2S)) / \mathcal{B}(X \to μμη_b(1S)) \approx 0.4$. We also reanalysis the fully-charm tetraquark states, and study the $X(6900)$ decay into the $J/ψψ(2S)$ channel to obtain the relative branching ratio $\mathcal{B}(X \to J/ψψ(2S)) / \mathcal{B}(X \to J/ψJ/ψ) \approx 0.1$.
description: 12 pages, 2 figure, 4 tables, revised version to be published in PRD
Slowest local operators in quantum spin chains
Creators: name: Kim, Hyungwon
name: Bañuls, Mari Carmen
name: Cirac, J. Ignacio
name: Hastings, Matthew B.
name: Huse, David A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We numerically construct slowly relaxing local operators in a nonintegrable spin-1/2 chain. Restricting the support of the operator to $M$ consecutive spins along the chain, we exhaustively search for the operator that minimizes the Frobenius norm of the commutator with the Hamiltonian. We first show that the Frobenius norm bounds the time scale of relaxation of the operator at high temperatures. We find operators with significantly slower relaxation than the slowest simple "hydrodynamic" mode due to energy diffusion. Then, we examine some properties of the nontrivial slow operators. Using both exhaustive search and tensor network techniques, we find similar slowly relaxing operators for a Floquet spin chain; this system is hydrodynamically "trivial", with no conservation laws restricting their dynamics. We argue that such slow relaxation may be a generic feature following from locality and unitarity.
description: 14 pages, 12 figures, published version
title:   COMPUTED TOMOGRAPHY IMAGE ANALYSIS
title: MODELING SKELETAL INJURIES IN THOROUGHBRED RACEHORSES
titleType: Subtitle
Creators: name: Camp, Grace Louise
Publisher: name: University of Kentucky Libraries
Year: 2023
Subjects: classificationCode: 4.3
subject: FOS: Veterinary sciences

description: Musculoskeletal injuries account for the majority of career-ending health concerns in Thoroughbred racehorses. A small but very serious subset of these can be life-threatening and usually involve fractures of the bones in the lower limb that occur during high-speed exercise or racing competitions. Understanding the etiopathogenesis of lower forelimb bone fractures leading to catastrophic musculoskeletal injuries (CMI) is the highest safety and welfare priority in horse racing. This thesis conducted two studies utilizing computed tomography (CT) images of Thoroughbred lower limbs. The first examined bone lesion annotations in 134 horses (268 forelimbs) across 105 anatomical sites to assess the concordance of lesion profiles. A series of pairwise comparisons were conducted utilizing a Hamming similarity metric to test the hypothesis that contralateral forelimbs exhibit high bone lesion concordance. The results strongly supported the hypothesis. Contralateral forelimbs displayed the highest level of lesion concordance in 101 instances, accounting for 37.69% of forelimbs within the population. While over half of the contralateral forelimbs (63.43% or 170 forelimbs) ranked within the top five positions based on Hamming similarity score rank. The second study assessed the degree of bone mineral density (BMD) adaptation of bones in the metacarpophalangeal (MCP) joint in response to the predictor variables age, gender, body weight, skeletal health, and recorded race starts. Samples used were categorized into four skeletal health groups corresponding to race training experience and primary cause of death. The hypothesis tested was that bones within the MCP joint of Thoroughbred racehorses exhibit concordant BMD changes in response to physiological modeling and remodeling. The results supported the hypothesis, but also identified interesting differences between bones that may be associated with disproportionate patterns of load and force distribution. Taken together, these studies contribute to the continuing efforts aimed at improving the safety and welfare of Thoroughbred racehorses and their riders.
description: 2023 Grace Louise Camp
ASSESSMENT PRACTICES OF PRIMARY STAGE TEACHERS IN ABHA GOVERNORATE IN LIGHT OF THE CORONA PANDEMIC
Creators: name: Dr. MOHAMAD AHMAD SALEEM KHASAWNEH
Publisher: name: Zenodo
Year: 2023
Subjects: Assessment Practices, Primary Stage Teachers, Corona Pandemic, Saudi Arabia.

description: Abstract
The objective of this study is to measure the assessment practices employed by primary-stage teachers in the Abha governorate, taking into consideration the impact of the coronavirus pandemic. Additionally, the study aims to measure the significance of statistical inequalities in competence based on years of experience and level of education. The study employed a descriptive research design and utilized a quantitative methodology, wherein the primary data collection tool was a questionnaire, in order to accomplish the objectives of the research. The survey encompassed a population of 287 male teachers from basic education stage schools in the Asir region. Teachers in the Asir region in the basic education stage demonstrated a commendable performance in many metrics of assessment of teachers' techniques, self-assessment techniques, and peer assessment techniques. The results of the study also indicated that there was no significant correlation between demographic variables, such as years of experience or degree of education, and the perspectives of primary school teachers on assessment practices.
title: Η πόλη ως ένα ζωντανό κολάζ: Ένα συνονθύλευμα αστικών θραυσμάτων και νοημάτων
title: The city as a living collage: a mixture of urban fragments and meanings
Creators: name: Ζυγογιαννη Αθηνα
Publisher: name: Technical University of Crete
Year: 2023

description: Η παρούσα εργασία, επιδιώκει να προσεγγίσει την κατανόηση και την ερμηνεία, την
πολυπλοκότητα και το χαώδες της πόλης, παρομοιάζοντας την πόλη ως κολάζ αστικών
θραυσμάτων και νοημάτων μέσα από αναλύσεις θεωρήσεων και έργων αρχιτεκτόνων με την πάροδο του χρόνου. Ακόμη, επιλέγεται η σημασία της τεχνικής αυτής, λόγω των δυνατοτήτων του κολάζ για την παραγωγή νοημάτων και νέων αφηγήσεων και ερμηνειών για την πόλη., στην πρώτη ενότητα, αναλύεται η τεχνική του κολάζ ως προς την αναπαράσταση της τέχνης αλλά και ως προς την ανάδειξη πληροφοριών, μεταφοράς μηνυμάτων στον δέκτη, με αποτέλεσμα να αποτελεί εναλλακτικό τρόπο μεθοδολογίας ανάγνωσης και σχεδίασης της πόλης. Επιπλέον, η ετερογένεια, που προσφέρει το κολάζ, παράγει μια έννοια, που δεν είναι σταθερή και εστιάζει στο στοιχείο της πολλαπλότητας και στη μη συγκεκριμενοποίηση ενός νοήματος, αλλά στη διπλή ανάγνωση. Στη δεύτερη ενότητα, η ανάλυση της πόλης κολάζ διερευνάται από δύο διαφορετικές οπτικές. Πιο συγκεκριμένα, εξετάζεται πρώτα η “πόλη - κολάζ” συνολικά και πώς αυτό μπορεί να αναγνωσθεί ως φόντο / “καμβάς”. Έπειτα, εξετάζονται χρονικά οι επιμέρους κατηγορίες των θραυσμάτων, που απαρτίζουν την “Πόλη - Κολάζ” και οι διαφορετικές θεωρήσεις και χειρισμοί αρχιτεκτόνων για τα θραύσματα αυτά. Τέλος, αναφέρεται η σύγχρονη διαχείριση τους και η αλληλεπίδραση των ατμοσφαιρικών θραυσμάτων τους ως προς το βίωμα.
The (2k-1)-connected multigraphs with at most k-1 disjoint cycles
Creators: name: Kierstead, H. A.
name: Kostochka, A. V.
name: Yeager, E. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15, 05C35, 05C40

description: In 1963, Corrádi and Hajnal proved that for all $k \ge 1$ and $n \ge 3k$, every (simple) graph on n vertices with minimum degree at least 2k contains k disjoint cycles. The same year, Dirac described the 3-connected multigraphs not containing two disjoint cycles and asked the more general question: Which (2k-1)-connected multigraphs do not contain k disjoint cycles? Recently, the authors characterized the simple graphs G with minimum degree $δ(G) \ge 2k-1$ that do not contain k disjoint cycles. We use this result to answer Dirac's question in full.
description: 7 pages, 2 figures. To appear in Combinatorica
A first look at the SMACS0723 JWST ERO: spectroscopic redshifts, stellar masses and star-formation histories
Creators: name: Carnall, A. C.
name: Begley, R.
name: McLeod, D. J.
name: Hamadouche, M. L.
name: Donnan, C. T.
name: McLure, R. J.
name: Dunlop, J. S.
name: Milvang-Jensen, B.
name: Bondestam, C. L.
name: Cullen, F.
name: Jewell, S. M.
name: Pollock, C. L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a first-look analysis of the JWST ERO data in the SMACS J0723.3-7327 cluster field. We begin by reporting 10 new spectroscopic redshifts from $λ_\mathrm{obs}=1.8-5.2μ$m NIRSpec medium-resolution ($R=λ/Δλ= 1000$) data. These are determined via multiple high-SNR emission line detections, with 5 objects at $1 < z < 3$ displaying multiple rest-frame near-infrared Hydrogen Paschen lines, and 5 objects at $5 < z < 9$ displaying rest-frame optical Oxygen and Hydrogen Balmer lines. For the 5 higher-redshift galaxies we extract fluxes in 6 NIRCam bands spanning $λ_\mathrm{obs}=0.8-5μ$m and perform spectral energy distribution fitting, in combination with existing HST photometry. The $7 < z < 9$ objects exhibit a U-shaped pattern across the F277W, F356W and F444W bands, indicating a Balmer break seen in emission (Balmer jump) and high-equivalent-width [O\,\textsc{iii}] emission. This indicates an extremely young stellar population, with the bulk of the current mass having formed within the past 10 Myr. We report robust stellar masses and mean stellar ages from our spectral fitting, with the four $z > 6$ galaxies exhibiting low stellar masses from log$_{10}(M_*/$M$_\odot)=7.1-8.2$ and correspondingly young mean stellar ages of only a few Myr. This work highlights the critical importance of combining large upcoming NIRCam surveys with NIRSpec follow-up to measure the spectroscopic redshifts necessary to robustly constrain physical parameters.
description: 5 pages, 2 figures, 2 tables, accepted for publication in MNRAS Letters
Toxic Cyanobacteria Aerial Monitoring User Guide
Creators: name: Biggs, Hamish
name: Heath, Mark
name: Kuczynski, Anika
name: Bind, Jochen
name: Daly, Oonagh
name: Safi, Karl
name: Wood, Susie
Publisher: name: figshare
Year: 2022
Subjects: subject: 50206 Environmental Monitoring
subject: FOS: Earth and related environmental sciences

description: This user guide details the equipment, field measurements, biomass ground truth samples, laboratory processing, aerial imagery processing, and data analysis required to perform this toxic cyanobacteria aerial monitoring for Microcoleus. Most of the methods and equipment included in this user guide are applicable to other remote sensing tasks, and councils around New Zealand may use this guide as a starting reference for other classification and mapping work.
Two Journalisms? Linear and Curvilinear Relationships Between Journalists’ Role Ideals and Degree of Democracy
Creators: name: Geiß, Stefan
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Science Policy

description: If there are authoritarian, transitional, and democratic political and media systems, are there associated authoritarian, transitional, and democratic role profiles for journalists? The relation between countries’ degree of democracy and the importance of journalistic role conceptions among journalists in a country is analyzed based on the World Journalism Study (Wave 2). I find that journalists in democratic political systems generally subscribe to fewer role conceptions than journalists in authoritarian political systems; Journalism-for-Democracy is more defined by what it is not (i.e., journalists reject the typical role conceptions of Journalism-for-Authoritarianism and Journalism-in-Transition) than by what it is. Journalism in transitional political systems (i.e., hybrid regimes and deficient democracies) is characterized by a specific set of role conceptions that are linked to political activism, which journalists in full democracies tend to reject. The study reassesses which role conceptions might be typical for which kind of political systems leading to revised hypotheses regarding the link between democracy and journalistic role conceptions.
Unitarizing non-relativistic Coulomb scattering
Creators: name: Oller, J. A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compare the exactly solvable nonrelativistic Coulomb scattering with two recent unitarization methods for infinite-range forces. These methods require to calculate perturbatively the corresponding partial-wave amplitudes, which are then unitarized. We calculate the Coulomb partial-wave amplitudes up to the one-loop order. On the one hand, the unitarization method developed by Refs. [1, 2] reproduces properly the exact solution, with an accuracy improving as the order in the perturbative calculation of the input perturbative partial-wave amplitudes increases. This is also shown to be the case for the pole position of the ground state. On the other hand, the method developed by the more recent Ref. [3] gives rise to partial-wave amplitudes that do not reproduce the known solvable solution, and gives rise to a pole position with zero binding energy.
description: 12 pages, 2 figures
Evidence for a creative dilemma posed by repeated collaborations
Creators: name: Inoue, Hiroyasu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We focused on how repeat collaborations in projects for inventions affect performance. Repeat collaborations have two contradictory aspects. A positive aspect is team development or experience, and a negative aspect is team degeneration or decline. Since both contradicting phenomena are observed, inventors have a dilemma as to whether they should keep collaborating in a team or not. The dilemma has not previously been quantitatively analyzed. We provide quantitative and extensive analyses of the dilemma in creative projects by using patent data from Japan and the United States. We confirm three predictions to quantitatively validate the existence of the dilemma. The first prediction is that the greater the patent a team achieves, the longer the team will work together. The second prediction is that the impact of consecutive patents decreases after a team makes a remarkable invention, which is measured by the impact of patents. The third prediction is that the expectation of impact with new teams is greater than that with the same teams successful in the past. We find these predictions are validated in patents published in Japan and the United States. On the basis of these three predictions, we can quantitatively validate the dilemma in creative projects. We also propose preventive strategies for degeneration. One is developing technological diversity, and another is developing inventor diversity in teams.We find the two strategies are both effective by validating with the data.
A splitting approach for the Kadomtsev--Petviashvili equation
Creators: name: Einkemmer, Lukas
name: Ostermann, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider a splitting approach for the Kadomtsev--Petviashvili equation with periodic boundary conditions and show that the necessary interpolation procedure can be efficiently implemented. The error made by this numerical scheme is compared to exponential integrators which have been shown in Klein and Roidot (SIAM J. Sci. Comput., 2011) to perform best for stiff solutions of the Kadomtsev--Petviashvili equation. Since many classic high order splitting methods do not perform well, we propose a stable extrapolation method in order to construct an efficient numerical scheme of order four. In addition, the conservation properties and the possibility of order reduction for certain initial values for the numerical schemes under consideration is investigated.
Accurate dark matter halo elongation from weak-lensing stacking analysis
Creators: name: Gonzalez, Elizabeth J.
name: Hoffmann, Kai
name: Gaztañaga, Enrique
name: Lambas, Diego R. García
name: Fosalba, Pablo
name: Crocce, Martin
name: Castander, Francisco J.
name: Makler, Martín
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Shape estimates that quantify the halo anisotropic mass distribution are valuable parameters that provide information on their assembly process and evolution. Measurements of the mean shapes for a sample of cluster-sized halos can be used to test halo formation scenarios, as well as improving the modelling of potential biases in constraining cosmological parameters using these systems. In this work, we test the recovery of halo cluster shapes and masses applying weak-lensing stacking techniques. To this end, we use lensing $shear$ and a new dark matter halo catalogue, derived from the light-cone output of the cosmological simulation MICE-GC. We perform this study by combining the lensing signals obtained for several samples of halos, selected according to their mass and redshift, taking into account the main directions of the dark-matter distributions. In the analysis we test the impact of several potential systematics, such as the adopted modelling, the contribution of the neighbouring mass distributions, miscentering and misalignment effects. Our results show that, when some considerations regarding the halo relaxation state are taken into account, the lensing semi-axis ratio estimates are in agreement within $5\%$ with the mean shapes of the projected dark-matter particle distribution of the stacked halos. The methodology presented provides a useful tool to derive reliable shapes of galaxy clusters and to contrast them with those expected from numerical simulations. Furthermore, our proposed modelling, which takes into account the contribution of neighbouring halos, allows one to constrain the elongation of the surrounding mass distribution.
description: 18 pages, 12 figures, accepted MNRAS
Project repository for comparing north American bird distribution shifts
Creators: name: Huang, Qiongyu
Publisher: name: National Zoo and Smithsonian Conservation Biology Institute
Year: 2022
Subjects: Population ecology
Terrestrial ecology

description: We provide data and R script here for our project titled " Modeled distribution shifts of North American birds over four decades based on suitable climate alone do not predict observed shifts "
 Qiongyu Huang1, Brooke L. Bateman2, Nicole L. Michel2, Anna M. Pidgeon3, Volker C. Radeloff3, Patricia Heglund4, Andrew J. Allstadt5, A. Justin Nowakowski1,7, Jesse Wong1, John R. Sauer6 1. Smithsonian’s National Zoo and Conservation Biology Institute, Front Royal, VA, 22630, USA 2. Science Division, National Audubon Society, 225 Varick St, New York, NY 10014, USA 3. Forest and Wildlife Ecology Department, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706 4. US Fish and Wildlife Service, NWRS, Region 3, 2630 Fanta Reed Road, La Crosse, WI 54603, USA 5. US Fish and Wildlife Service, 5600 West American Boulevard, Bloomington, Minnesota, 55437 USA 6. USGS Patuxent Wildlife Research Center, 12100 Beech Forest Road, Laurel, MD 20708, USA 7. Moore Center for Science, Conservation International, 2011 Crystal Dr #600, Arlington, VA 22202, USA