cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tidal evolution of disky dwarf galaxies in the Milky Way potential: the formation of dwarf spheroidals
Creators: name: Klimentowski, Jaroslaw
name: Lokas, Ewa L.
name: Kazantzidis, Stelios
name: Mayer, Lucio
name: Mamon, Gary A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We conduct high-resolution collisionless N-body simulations to investigate the tidal evolution of dwarf galaxies on an eccentric orbit in the Milky Way (MW) potential. The dwarfs originally consist of a low surface brightness stellar disk embedded in a cosmologically motivated dark matter halo. During 10 Gyr of dynamical evolution and after 5 pericentre passages the dwarfs suffer substantial mass loss and their stellar component undergoes a major morphological transformation from a disk to a bar and finally to a spheroid. The bar is preserved for most of the time as the angular momentum is transferred outside the galaxy. A dwarf spheroidal (dSph) galaxy is formed via gradual shortening of the bar. This work thus provides a comprehensive quantitative explanation of a potentially crucial morphological transformation mechanism for dwarf galaxies that operates in groups as well as in clusters. We compare three cases with different initial inclinations of the disk and find that the evolution is fastest when the disk is coplanar with the orbit. Despite the strong tidal perturbations and mass loss the dwarfs remain dark matter dominated. For most of the time the 1D stellar velocity dispersion, σ, follows the maximum circular velocity, V_{\rm max}, and they are both good tracers of the bound mass. Specifically, we find that M_{\rm bound} \propto V_{\rm max}^{3.5} and V_{\rm max} \sim \sqrt{3} σin agreement with earlier studies based on pure dark matter simulations. The latter relation is based on directly measuring the stellar kinematics of the simulated dwarf and may thus be reliably used to map the observed stellar velocity dispersions of dSphs to halo circular velocities when addressing the missing satellites problem.
description: 16 pages, 14 figures, significantly revised version with new simulations analyzed, accepted for publication in MNRAS
Additional file 1 of Strain Tunable Bandgap and High Carrier Mobility in SiAs and SiAs2 Monolayers from First-Principles Studies
Creators: name: Bai, Shouyan
name: Niu, Chun-Yao
name: Yu, Weiyang
name: Zhu, Zhili
name: Cai, Xiaolin
name: Jia, Yu
Publisher: name: figshare
Year: 2018
Subjects: subject: Cell Biology
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy

description: Supplementary online material for â Strain tunable bandgap and high carrier mobility in SiAs, SiAs2 monolayers from first-principles studiesâ . (PDF 1507 kb)
Mollie M. Madden, The Black Prince and the Grande Chevauchée of 1355
Creators: name: Egan, Simon
Publisher: name: British Journal for Military History
Year: 2019

description: Mollie M. Madden. The Black Prince and the Grande Chevauchée of 1355. Warfare in History. Woodbridge: Boydell and Brewer, 2018. xi + 248 pp. Hardback. ISBN: 978-1-78327-356-0. Price £60.00
description: British Journal for Military History, Vol 5 No 1 (2019)
Additional file 1 of Early application of metagenomics next-generation sequencing may significantly reduce unnecessary consumption of antibiotics in patients with fever of unknown origin
Creators: name: Chen, Hongmei
name: Tang, Mingze
name: Yao, Lemeng
name: Zhang, Di
name: Zhang, Yubin
name: Zhao, Yingren
name: Xia, Han
name: Chen, Tianyan
name: Zheng, Jie
Publisher: name: figshare
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified

description: Supplementary Material 1
hc/4e oscillations in a model for (100)/(110) SQUIDs of d-wave superconductors
Creators: name: Hilario, L. M. Leon
name: Aligia, A. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use a model of hard-core bosons to describe a SQUID built with two crystals of $d_{x^2-y^2}$-superconductors with orientations (100) and (110). Across the two faceted (100)/(110) interfaces, the structure of the superconducting order parameter leads to an alternating sign of the local Josephson coupling, and the possibility of quartet formation. Using a mapping of the boson model to an $XXZ$ model, we calculate numerically the energy of the system as a function of the applied magnetic flux, finding signals of $hc/4e$ oscillations in a certain region of parameters. This region has a large overlap to that at which binding of bosons exists.
description: 6 pages, 5 figures
Formulation of Stochastic Contact Hamiltonian Systems
Creators: name: Wei, Pingyuan
name: Wang, Zibo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: In this work we devise a stochastic version of contact Hamiltonian systems, and show that the phase flows of these systems preserve contact structures. Moreover, we provide a sufficient condition under which these stochastic contact Hamiltonian systems are completely integrable. This establishes an appropriate framework for investigating stochastic contact Hamiltonian systems.
Peter Sikora, The Polish ‘Few’: Polish Airmen in the Battle of Britain
Creators: name: Grayson, Richard S
Publisher: name: British Journal for Military History
Year: 2019

description: Peter Sikora, The Polish ‘Few’: Polish Airmen in the Battle of Britain. Barnsley: Pen & Sword Military, 2018. xvii + pp. 574. ISBN: 978-1526-714855. Price £30.00.
description: British Journal for Military History, Vol 5 No 1 (2019)
Assessing strategic management of e-waste in developing countries
Creators: name: Kumar Awasthi, Abhishek
name: Iacovidou, Eleni
name: Kumar Awasthi, Mrigendra
name: Johnson, Michael
name: Parajuly, Keshav
name: Zhao, Min
name: Mishra, Saket
name: Kumar Pandey, Akhilesh
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 40
subject: Engineering

description: E-waste is one of the fastest growing waste streams in the world, paradoxically containing both hazardous components and substances which can adversely impact on both the environment and public health, as well as valuable secondary resources and raw materials that could be recovered if e-waste is processed properly. Developing countries not only lack the infrastructure and technology required to manage e-waste appropriately, they largely rely on a fragmented informal sector for the management of a large fraction of e-waste that is either recognized by the state, or is marginalized and suppressed. This article examines the current situation with e-waste management in the developing countries, and assesses these countries’ challenges. The study highlights that there is an urgent need to design more better framework for e-waste that protect these countries from the problems caused by e-waste that are beyond repair and refurbishment, and to help these countries to advance their e-waste recycling and disposal facilities to prevent open burning on and dumping in the environment that can result in deleterious effects on communities at a local as well as at a global level.
Move Beyond Trajectories: Distribution Space Coupling for Crowd Navigation
Creators: name: Sun, Muchen
name: Baldini, Francesca
name: Trautman, Peter
name: Murphey, Todd
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Cooperatively avoiding collision is a critical functionality for robots navigating in dense human crowds, failure of which could lead to either overaggressive or overcautious behavior. A necessary condition for cooperative collision avoidance is to couple the prediction of the agents' trajectories with the planning of the robot's trajectory. However, it is unclear that trajectory based cooperative collision avoidance captures the correct agent attributes. In this work we migrate from trajectory based coupling to a formalism that couples agent preference distributions. In particular, we show that preference distributions (probability density functions representing agents' intentions) can capture higher order statistics of agent behaviors, such as willingness to cooperate. Thus, coupling in distribution space exploits more information about inter-agent cooperation than coupling in trajectory space. We thus introduce a general objective for coupled prediction and planning in distribution space, and propose an iterative best response optimization method based on variational analysis with guaranteed sufficient decrease. Based on this analysis, we develop a sampling-based motion planning framework called DistNav that runs in real time on a laptop CPU. We evaluate our approach on challenging scenarios from both real world datasets and simulation environments, and benchmark against a wide variety of model based and machine learning based approaches. The safety and efficiency statistics of our approach outperform all other models. Finally, we find that DistNav is competitive with human safety and efficiency performance.
description: 12 pages
Frank Ledwidge, Aerial Warfare: The Battle for the Skies
Creators: name: Greenacre, John
Publisher: name: British Journal for Military History
Year: 2019

description: Frank Ledwidge, Aerial Warfare: The Battle for the Skies. Oxford: Oxford University Press, 2018. 184pp. ISBN 978-0-19-881813-7 (hardback). Price £12.99.
description: British Journal for Military History, Vol 5 No 1 (2019)
Multi-player Multi-armed Bandits with Collision-Dependent Reward Distributions
Creators: name: Shi, Chengshuai
name: Shen, Cong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Signal Processing (eess.SP)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: We study a new stochastic multi-player multi-armed bandits (MP-MAB) problem, where the reward distribution changes if a collision occurs on the arm. Existing literature always assumes a zero reward for involved players if collision happens, but for applications such as cognitive radio, the more realistic scenario is that collision reduces the mean reward but not necessarily to zero. We focus on the more practical no-sensing setting where players do not perceive collisions directly, and propose the Error-Correction Collision Communication (EC3) algorithm that models implicit communication as a reliable communication over noisy channel problem, for which random coding error exponent is used to establish the optimal regret that no communication protocol can beat. Finally, optimizing the tradeoff between code length and decoding error rate leads to a regret that approaches the centralized MP-MAB regret, which represents a natural lower bound. Experiments with practical error-correction codes on both synthetic and real-world datasets demonstrate the superiority of EC3. In particular, the results show that the choice of coding schemes has a profound impact on the regret performance.
description: 17 pages, 14 figures. Accepted to IEEE Transactions on Signal Processing
The disentangling power of unitaries
Creators: name: Clarisse, Lieven
name: Ghosh, Sibasish
name: Severini, Simone
name: Sudbery, Anthony
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We define the disentangling power of a unitary operator in a similar way as the entangling power defined by Zanardi, Zalka and Faoro [PRA, 62, 030301]. A general formula is derived and it is shown that both quantities are directly proportional. All results concerning the entangling power can simply be translated into similar statements for the disentangling power. In particular, the disentangling power is maximal for certain permutations derived from orthogonal latin squares. These permutations can therefore be interpreted as those that distort entanglement in a maximal way.
description: 2 pages; Addendum to quant-ph/0502040
Benjamin A. Cowan, Securing Sex: Morality and Repression in the Making of Cold War Brazil
Creators: name: Guy, Donna J
Publisher: name: British Journal for Military History
Year: 2019

description: Benjamin A. Cowan. Securing Sex: Morality and Repression in the Making of Cold War Brazil. Chapel Hill: University of North Carolina Press, 2016. 340pp. ISBN:978-1-4696-2750-2 (paperback). Price £36.95.
description: British Journal for Military History, Vol 5 No 1 (2019)
The distant red galaxy neighbour population of 1 < z < 2 QSOs and optically obscured sources
Creators: name: Bornancini, Carlos G.
name: Lambas, Diego Garcia
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the Distant Red Galaxy (DRG, J-K_s > 2.3) neighbour population of Quasi Stellar Objects (QSOs) selected from the Sloan Digital Sky Survey (SDSS) in the redshift range 1 < z < 2. We perform a similar analysis for optically obscured AGNs (i.e. with a limiting magnitude I > 24) detected in the mid-infrared (24 $μ$m) with the Spitzer Space Telescope and a mean redshift $z\sim 2.2$ in the Flamingos Extragalactic Survey (FLAMEX). Both QSOs and obscured AGN target samples cover 4.7 deg$^2$ in the same region of the sky. We find a significant difference in the environment of these two target samples. Neighbouring galaxies close to QSOs tend to be bluer than galaxies in optically obscured source environments. We also present results on the cross-correlation function of DRGs around QSOs and optically faint mid-infrared sources. The corresponding correlation length obtained for the QSO sample targets is $r_0$=$5.4\pm1.6$ Mpc h$^{-1}$ and a slope of $γ$=$1.94\pm0.10$ . For the optically obscured galaxy sample we find $r_0$=$8.9\pm1.4$ Mpc h$^{-1}$ and a slope of $γ$=$2.27\pm0.20$. These results indicate that optically faint obscured sources are located in denser environment of evolved red galaxies compare to QSOs.
description: Accepted for publication in MNRAS, 9 pages including 5 PostScript figures and 3 tables
Additional file 3 of Talc pleurodesis versus indwelling pleural catheter among patients with malignant pleural effusion: a meta-analysis of randomized controlled trials
Creators: name: Wang, Li
name: Deng, Huan
name: Chen, Xinling
name: Li, Can
name: Yi, Fengming
name: Wei, Yiping
name: Zhang, Wenxiong
Publisher: name: figshare
Year: 2020
Subjects: subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 3: Table S3. Quality assessment of all included studies using the new version 2 of the Cochrane risk-of-bias tool.
Strategic firm behavior and entry deterrence: three essays
Creators: name: Yong, Jong-Say
Publisher: name: University of British Columbia
Year: 2008

description: This thesis consists of three independent chapters on entry deterrence. The first two chapters consider the use of contracts as a barrier to entry, while the final chapter examines the possibility of firms expanding their product lines to deter entry in a vertical differentiation model. In Chapter 1, the role of exclusive dealing contracts in the liner shipping industry is investigated. It is shown that if the entrant is capacity-constrained, exclusive dealing contracts can be an effective entry barrier, even if the entrant has a lower cost. Chapter 2considers an industry with two stages of production. It is shown that an upstream incumbent is able to deter the entry of a more efficient producer by establishing long-term contractual relations with downstream firms, provided the downstream firms are in direct competition against each other. Chapter 3 considers the question of entry deterrence in a one-dimensional market where goods are differentiated by quality. It is shown that an incumbent firm may decide to produce several products solely for the purpose of deterring entry. Again, it is possible that a lower-cost entrant is deterred. In all three chapters, the welfare consequence is clear: social welfare is lower, since more efficient entrants are excluded from the market.
Οι προσδιοριστικοί παράγοντες της επαγγελματικής εξουθένωσης στους εκπαιδευτικούς
Creators: name: Κεσίστορνου, Φωτεινή Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Επαγγελματική εξουθένωση
Φόρτος εργασίας
Υποστήριξη από συναδέλφους και διοίκηση
Burnout
Workload
Social support

description: Η παρούσα διπλωματική εργασία εξετάζει το φαινόμενο της επαγγελματικής εξουθένωσης στους εκπαιδευτικούς και προσπαθεί να ερευνήσει τους παράγοντες που την επηρεάζουν σε μια σχολική μονάδα. Στην αρχή παρουσιάζεται ένα εκτενές θεωρητικό υπόβαθρο το οποίο αφορά την επαγγελματική εξουθένωση, με βάση βιβλιογραφική ανασκόπηση και αναφέρει ορισμούς, μοντέλα αλλά και τους παράγοντες που σχετίζονται με την επαγγελματική εξουθένωση. Στη συνέχεια παρουσιάζονται οι ερευνητικές υποθέσεις της εργασίας, οι οποίες αφορούν τρεις συγκεκριμένες μεταβλητές , το φόρτο εργασίας , την υποστήριξη από τους συναδέλφους αλλά και τη διοίκηση και το κατά πόσο επηρεάζουν την επαγγελματική εξουθένωση των εκπαιδευτικών και ποιες διαστάσεις της . Στη συνέχεια παρατίθενται τα αποτελέσματα της έρευνας, η οποία διεξήχθη με ερωτηματολόγιο, σε ένα δείγμα 108 εκπαιδευτικών, όλων των ειδικοτήτων, ο οποίοι εργάζονται σε ιδιωτικά και δημόσια σχολεία της Θεσσαλονίκης. Από την έρευνα διαπιστώθηκε πως ο φόρτος εργασίας αποτελεί προβλεπτικό παράγοντα για τη διάσταση της συναισθηματικής εξάντλησης των εκπαιδευτικών και για κάποια σημεία του κυνισμού τους. Επιπλέον διαπιστώθηκε πως η υποστήριξη από τη διοίκηση επηρεάζει σε ένα ποσοστό την συναισθηματική εξάντληση των εκπαιδευτικών ενώ η υποστήριξη από τους συναδέλφους, παρά τις βιβλιογραφικές αναφορές δεν φαίνεται να αποδεικνύεται ότι επηρεάζει την επαγγελματική εξουθένωση. Στο τέλος προτείνονται κάποιες παρεμβάσεις, οι οποίες θα μπορούσαν να γίνουν στα πλαίσια της σχολικής μονάδας, ώστε να αποφευχθούν φαινόμενα της επαγγελματικής εξουθένωσης και των συνεπειών που προκαλούν αλλά γίνονται και προτάσεις για μελλοντική έρευνα.
description: The present dissertation examines the phenomenon of burnout in teachers and tries to investigate the factors that affect it. At the beginning, after presenting an extensive theoretical background ,which concerns burnout based on bibliographic review and mentions definitions, models and factors related to burnout in general, then the research hypotheses of the work are presented, which concern three specific variables, the workload, the support from colleagues but also the administration and whether they affect the burnout of teachers and what are its dimensions. The following is the results of a survey conducted by a questionnaire on a sample of 108 teachers, who work in private and public schools, which showed that workload is a major predictor of the dimension of teachers. Emotional exhaustion appears that at some points affects burnout but support from colleagues proved to be a factor that does not contribute to burnout syndrome. In the end, some interventions, are proposed which could be done within the school unit in order to avoid phenomena of burnout and the consequences they cause, as well as suggestions for future research.
Higher Compact Multiple Occurrence Around Metal-Poor M-Dwarfs and Late K-Dwarfs
Creators: name: Anderson, Sophie G.
name: Dittmann, Jason A.
name: Ballard, Sarah
name: Bedell, Megan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The planet-metallicity correlation serves as a potential link between exoplanet systems as we observe them today and the effects of bulk composition on the planet formation process. Many observers have noted a tendency for Jovian planets to form around stars with higher metallicities; however, there is no consensus on a trend for smaller planets. Here, we investigate the planet-metallicity correlation for rocky planets in single and multi-planet systems around Kepler M-dwarf and late K-dwarf stars. Due to molecular blanketing and the dim nature of these low mass stars, it is difficult to make direct elemental abundance measurements via spectroscopy. We instead use a combination of accurate and uniformly measured parallaxes and photometry to obtain relative metallicities and validate this method with a subsample of spectroscopically determined metallicities. We use the Kolmogorov-Smirnov (KS) test, Mann-Whitney U test, and Anderson-Darling test to compare the compact multiple planetary systems with single transiting planet systems and systems with no detected transiting planets. We find that the compact multiple planetary systems are derived from a statistically more metal-poor population, with a p-value of 0.015 in the KS test, a p-value of 0.005 in the Mann-Whitney U test, and a value of 2.574 in the Anderson-Darling test statistic, which exceeds the derived threshold for significance by a factor of 25. We conclude that metallicity plays a significant role in determining the architecture of rocky planet systems. Compact multiples either form more readily, or are more likely to survive on Gyr timescales, around metal-poor stars.
description: 27 pages, 16 figures, accepted into The Astronomical Journal
Coupled quantum wires
Creators: name: Makogon, D.
name: de Jeu, N.
name: Smith, C. Morais
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a set of crossed 1D systems, which are coupled with each other via tunnelling at the crossings. We begin with the simplest case with no electron-electron interactions and find that besides the expected level splitting, bound states can emerge. Next, we include an external potential and electron-electron interactions, which are treated within the Hartree approximation. Then, we write down a formal general solution to the problem, giving additional details for the case of a symmetric external potential. Concentrating on the case of a single crossing, we were able to explain recent experinents on crossed metallic and semiconducting nanotubes [J. W. Janssen, S. G. Lemay, L. P. Kouwenhoven, and C. Dekker, Phys. Rev. B 65, 115423 (2002)], which showed the presence of localized states in the region of crossing.
description: 11 pages, 10 figures
High frequency observations of southern pulsars
Creators: name: Johnston, Simon
name: Karastergiou, Aris
name: Willett, Kyle
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present polarization data for 32 mainly southern pulsars at 8.4 GHz. The observations show that the polarization fraction is low in most pulsars at this frequency except for the young, energetic pulsars which continue to show polarization fractions in excess of 60 per cent. All the pulsars in the sample show evidence for conal emission with only one third also showing core emission. Many profiles are asymmetric, with either the leading or the trailing part of cone not detectable. Somewhat surprisingly, the asymmetric profiles tend to be more polarized than the symmetrical profiles. Little or no pulse narrowing is seen between 1 and 8.4 GHz. The spectral behaviour of the orthogonal polarization modes and radius to frequency mapping can likely account for much of the observational phenomenology. Highly polarized components may orginate from higher in the magnetosphere than unpolarized components.
description: Accepted by MNRAS. 13 pages. 6 figures
Breakdown of Stokes-Einstein relation in supercooled water
Creators: name: Kumar, Pradeep
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Water displays breakdown of the Stokes-Einstein relation at low temperatures. We hypothesize that the breakdown is a result of the structural changes and a sharp rise in dynamic heterogeneities that occurs low T upon crossing the Widom line.
description: 5 Pages, 2 Figures
(Pseudo)-Dirac neutrinos and leptogenesis
Creators: name: Abel, Steven
name: Page, Veronique
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss how Dirac neutrinos can naturally be generated in supersymmetry and how they allow for an Affleck-Dine leptogenesis scenario, in which a left-right asymmetry is generated in the sneutrino sector, the left part of which is transferred to a baryon asymmetry via sphaleron transitions. No exotic fields need to be added to the MSSM other than the right-handed neutrino.
description: 7 pages, 1 figure, Talk given at the Dark Side of the Universe Conference 2006 (DSU2006), Madrid, Spain, 20-24 June 2006
The energy dependence of burst oscillations from the accreting millisecond pulsar XTE J1814-338
Creators: name: Watts, Anna L.
name: Strohmayer, Tod E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The nature of the asymmetry that gives rise to Type I X-ray burst oscillations on accreting neutron stars remains a matter of debate. Of particular interest is whether the burst oscillation mechanism differs between the bursting millisecond pulsars and the non-pulsing systems. One means to diagnose this is to study the energy dependence of the burst oscillations: here we present an analysis of oscillations from 28 bursts observed during the 2003 outburst of the accreting millisecond pulsar XTE J1814-338. We find that the fractional amplitude of the burst oscillations falls with energy, in contrast to the behaviour found by Muno et al. (2003) in the burst oscillations from a set of non-pulsing systems. The drop with energy mirrors that seen in the accretion-powered pulsations; in this respect XTE J1814-338 behaves like the other accreting millisecond pulsars. The burst oscillations show no evidence for either hard or soft lags, in contrast to the persistent pulsations, which show soft lags of up to 50 $μ$s. The fall in amplitude with energy is inconsistent with current surface mode and simple hot spot models of burst oscillations. We discuss improvements to the models and uncertainties in the physics that might resolve these issues.
description: Some amendments to the discussion section, accepted for publication in MNRAS
The classical two-dimensional Heisenberg model revisited: An $SU(2)$-symmetric tensor network study
Creators: name: Schmoll, Philipp
name: Kshetrimayum, Augustine
name: Eisert, Jens
name: Orus, Roman
name: Rizzi, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The classical Heisenberg model in two spatial dimensions constitutes one of the most paradigmatic spin models, taking an important role in statistical and condensed matter physics to understand magnetism. Still, despite its paradigmatic character and the widely accepted ban of a (continuous) spontaneous symmetry breaking, controversies remain whether the model exhibits a phase transition at finite temperature. Importantly, the model can be interpreted as a lattice discretization of the $O(3)$ non-linear sigma model in $1+1$ dimensions, one of the simplest quantum field theories encompassing crucial features of celebrated higher-dimensional ones (like quantum chromodynamics in $3+1$ dimensions), namely the phenomenon of asymptotic freedom. This should also exclude finite-temperature transitions, but lattice effects might play a significant role in correcting the mainstream picture. In this work, we make use of state-of-the-art tensor network approaches, representing the classical partition function in the thermodynamic limit over a large range of temperatures, to comprehensively explore the correlation structure for Gibbs states. By implementing an $SU(2)$ symmetry in our two-dimensional tensor network contraction scheme, we are able to handle very large effective bond dimensions of the environment up to $χ_E^\text{eff} \sim 1500$, a feature that is crucial in detecting phase transitions. With decreasing temperatures, we find a rapidly diverging correlation length, whose behaviour is apparently compatible with the two main contradictory hypotheses known in the literature, namely a finite-$T$ transition and asymptotic freedom, though with a slight preference for the second.
description: 28 pages, 10 figures, slightly updated data and improved presentation of scaling procedure
Charles J. Esdaile, Napoleon, France and Waterloo: The Eagle Rejected
Creators: name: Leggiere, Michael
Publisher: name: British Journal for Military History
Year: 2019

description: Charles J. Esdaile, Napoleon, France and Waterloo: The Eagle Rejected. Barnsley: Pen & Sword, 2017. 257pp. ISBN 9781473870826 (hardback). £25.
description: British Journal for Military History, Vol 5 No 1 (2019)
Genetically Optimized Prediction of Remaining Useful Life
Creators: name: Agrawal, Shaashwat
name: Sarkar, Sagnik
name: Srivastava, Gautam
name: Maddikunta, Praveen Kumar Reddy
name: Gadekallu, Thippa Reddy
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The application of remaining useful life (RUL) prediction has taken great importance in terms of energy optimization, cost-effectiveness, and risk mitigation. The existing RUL prediction algorithms mostly constitute deep learning frameworks. In this paper, we implement LSTM and GRU models and compare the obtained results with a proposed genetically trained neural network. The current models solely depend on Adam and SGD for optimization and learning. Although the models have worked well with these optimizers, even little uncertainties in prognostics prediction can result in huge losses. We hope to improve the consistency of the predictions by adding another layer of optimization using Genetic Algorithms. The hyper-parameters - learning rate and batch size are optimized beyond manual capacity. These models and the proposed architecture are tested on the NASA Turbofan Jet Engine dataset. The optimized architecture can predict the given hyper-parameters autonomously and provide superior results.
description: Submitted to SUSCOM, Elsevier
Brief history of the Lehmann Symposia: Origins, goals and motivation
Creators: name: Rojo, Javier
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: The idea of the Lehmann Symposia as platforms to encourage a revival of interest in fundamental questions in theoretical statistics, while keeping in focus issues that arise in contemporary interdisciplinary cutting-edge scientific problems, developed during a conversation that I had with Victor Perez Abreu during one of my visits to Centro de Investigación en Matemáticas (CIMAT) in Guanajuato, Mexico. Our goal was and has been to showcase relevant theoretical work to encourage young researchers and students to engage in such work. The First Lehmann Symposium on Optimality took place in May of 2002 at Centro de Investigación en Matemáticas in Guanajuato, Mexico. A brief account of the Symposium has appeared in Vol. 44 of the Institute of Mathematical Statistics series of Lecture Notes and Monographs. The volume also contains several works presented during the First Lehmann Symposium. All papers were refereed. The program and a picture of the participants can be found on-line at the website http://www.stat.rice.edu/lehmann/lst-Lehmann.html.
description: Published at http://dx.doi.org/10.1214/074921706000000347 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Non-Markov statistical effects of X-ray emission intensity of the microquasar GRS 1915+105
Creators: name: Yulmetyev, R. M.
name: Demin, S. A.
name: Khusnutdinov, R. M.
name: Panischev, O. Yu.
name: Hänggi, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Space Physics (physics.space-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: In this paper we develop the new approach in time series analysis with a variable time step and present the results of quantitative and qualitative estimation of randomness and regularity, and the study of non-Markovian effects of the X-ray emission intensity of the microquasar GRS 1915+105. Our estimation is based on the application of the theory of discrete non-Markovian stochastic processes and gives a wide set of quantitative characteristics and parameters of the studied system with a variable time step. This set reflects the change of the effects of randomness and regularity, the alternation of Markovian and non-Markovian processes in the initial time signals. Initially these characteristics were determined for the simple model systems constructed by means of a molecular dynamics method. Further the calculation of these parameters was executed for the X-ray emission intensity of the microquasar GRS 1915+105. We have developed a theoretical scheme for the detailed analysis of the time series with a variable time step. The new theory allows us to extract more detailed information about the X-ray emission of the microquasar GRS 1915+105 from the experimental time series. The received set of the parameters allows to estimate accurately randomness and stochastic behavior, regularity and robustness, non-Markovian effects of statistical memory in the intensity of the X-ray emission. The analysis of the experimental data with a constant and variable time step is carried out by means of phase portraits, power spectra of the initial time and event correlation function (TCF and ECF), and memory functions (MF) of the junior order, the first three points of non-Markovity parameter.
description: 18 pages, 11 figures, 2 tables
Geert van Uythoven, The Secret Expedition: the Anglo–Russian Invasion of North Holland, 1799
Creators: name: Reiter, Jacqueline
Publisher: name: British Journal for Military History
Year: 2019

description: Geert van Uythoven, The Secret Expedition: the Anglo–Russian Invasion of North Holland, 1799. Warwick: Helion and Company, 2018. 448pp. ISBN 978-1-912390-20-5 (hardback). Price £29.99.
description: British Journal for Military History, Vol 5 No 1 (2019)
Teprenone ameliorates Diclofenac-induced Small Intestinal Injury via Inhibiting Protease Activated Receptors 1 and 2 activity
Creators: name: Chao, Guanqun
name: Wang, Zhaojun
name: Yang, Chaoyu
name: Qian, Yanna
name: Zhang, Shuo
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Science Policy
subject: Immunology
subject: FOS: Clinical medicine
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: This study aimed to investigate specific protein expression of injured intestinal mucosa induced by diclofenac, and explore the protective effects of teprenone on it. Intestinal damage of Sprague Dawley male rats was gradually induced by the intragastric administration of diclofenac. After the last drug administration, the intestinal mucosa was taken off with an interval of 24 hours, subsequently, its general histological injury and ultrastructure were observed and analyzed by a transmission electron microscope. The expression levels of PAR1 and PAR2 protein were detected by immunohistochemistry and real-time polymerase chain reaction (PCR). The Reuter and Chiu scores of small intestinal damage were 5.63 ± 1.30 and 4.25 ± 0.70 respectively in the model group, which could be protected by teprenone (100 mg/kg⋅d) with the degree of 55.7% and 44%. Optical microscopy and transmission electron microscope showed that intestinal mucosa and ultrastructure were severely damaged. Distributed in the cytoplasm or aligned with the nucleus, the expression of PAR1 and PAR2 was significantly upregulated after the administration of diclofenac, while it was relieved after the treatment of teprenone. Our study presents a new view that teprenone might protect NSAIDs-induced (diclofenac) intestinal injury via suppressing the expression of PAR1 and PAR2.
Young Stars in the Camelopardalis Dust and Molecular Clouds. III. the GL 490 Region
Creators: name: Straizys, V.
name: Laugalys, V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the infrared photometry data extracted from the 2MASS, IRAS and MSX databases, 50 suspected young stellar objects (YSOs) are selected from about 37500 infrared objects in the 3x3 deg area with the center at Galactic longitude 142.5 deg and latitude +1.0 deg, in the vicinity of the young stellar object GL 490 in the dark cloud DoH 942 (Dobashi et al. 2005). The spectral energy distributions between 700 nm and 100 mum suggest that most of the selected objects may be YSOs of classes I and II. In the color-magnitude diagram K_s vs. H-K_s the suspected YSOs occupy an area right of the main sequence what can be interpreted as being caused by the effects of luminosity, interstellar and circumstellar reddening and infrared thermal emission in circumstellar envelopes and disks.
Η επιρροή των κινήτρων μάθησης στην παρακολούθηση των Μαζικών Ανοικτών Διαδικτυακών Μαθημάτων (MOOC) : Έρευνα με τη χρήση διαδραστικού ερωτηματολογίου με το εργαλείο H5P
Creators: name: Δομανόγλου, Ευθαλία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Κίνητρα μάθησης
H5P
Διάδραση
Learning motives
Interactive

description: Η συγκεκριμένη εργασία έχει ως στόχο τον έλεγχο συσχετίσεων μεταξύ των κινήτρων μάθησης και της παρακολούθησης των Μαζικών Ανοικτών Διαδικτυακών Μαθημάτων (MOOC). Γι’ αυτόν τον λόγο εξετάστηκαν οι συσχετίσεις των στόχων επίδοσης και μάθησης με τους λόγου επιλογής ενός MOOC, καθώς και με τη ολοκλήρωση και παρακολούθηση ενός MOOC. Για τον έλεγχο των συσχετίσεων αξιοποιήθηκε το εργαλείο H5P, καθώς αποτελεί καινοτόμο στοιχείο της έρευνας και χρησιμοποιήθηκε με τη μορφή διαδραστικού βίντεο-ερωτηματολογίου. Το ερωτηματολόγιο μοιράστηκε σε φοιτητές και συμπληρώθηκε από 71 άτομα. Από τις απαντήσεις τους προέκυψε το συμπέρασμα ότι ενώ οι στόχοι επίδοσης επηρεάζουν τον λόγο για τον οποίο επιλέγει κανείς να παρακολουθήσει ένα MOOC, οι στόχοι μάθησης είναι αυτοί που επηρεάζουν την ολοκλήρωση ενός MOOC. Τέλος, αναφορικά με την παρακολούθηση ενός MOOC, παρατηρείται ότι πρόκειται για μια μεταβλητή που επηρεάζεται οριακά και από το στόχο μάθησης και από το στόχο επίδοσης.
description: The scope of the study is to examine the relationship between learning motives and the degree to which students participate and are familiar with Massive Open Online Courses (MOOC). In the endeavor to discover this concern, the following variables were examined. The study synthesizes the causal link between Performance and Learning Goals in relation to the factors of MOOC Selection, Completion and Participation. For inspecting this relationship, the H5P open-sourced tool was used for data collection, as it adds new value to the study by utilizing the interactive video-questionnaire option. The questionnaire was distributed and completed by the total of 71 students. Eventually, it is established that Performance Goals affect the reason for which a students select to take part in a MOOC, while Learning Goals are in a positive relationship with MOOC Completion. Finally, MOOC Participation is found to be influenced by both Learning and Performance Goals.
Puffed Noncommutative Nonabelian Vortices
Creators: name: Bouatta, Nazim
name: Evslin, Jarah
name: Maccaferri, Carlo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present new solutions of noncommutative gauge theories in which coincident unstable vortices expand into unstable circular shells. As the theories are noncommutative, the naive definition of the locations of the vortices and shells is gauge-dependent, and so we define and calculate the profiles of these solutions using the gauge-invariant noncommutative Wilson lines introduced by Gross and Nekrasov. We find that charge 2 vortex solutions are characterized by two positions and a single nonnegative real number, which we demonstrate is the radius of the shell. We find that the radius is identically zero in all 2-dimensional solutions. If one considers solutions that depend on an additional commutative direction, then there are time-dependent solutions in which the radius oscillates, resembling a braneworld description of a cyclic universe. There are also smooth BIon-like space-dependent solutions in which the shell expands to infinity, describing a vortex ending on a domain wall.
description: 21 pages, 3 eps figures. v2: published version, analytic solution added
Close Pairs as Probes of the Galaxy's Chemical Evolution
Creators: name: Vanbeveren, Dany
name: De Donder, Erwin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Understanding the galaxy in which we live is one of the great intellectual challenges facing modern science. With the advent of high quality observational data, the chemical evolution modeling of our galaxy has been the subject of numerous studies in the last years. However, all these studies have one missing element which is the evolution of close binaries. Reason: their evolution is very complex and single stars only perhaps can do the job. (Un)Fortunately at present we know that a significant fraction of the observed intermediate mass and massive stars are members of a binary or multiple system and that certain objects can only be formed through binary evolution. Therefore galactic studies that do not account for close binaries may be far from realistic. We implemented a detailed binary population in a galactic chemical evolutionary model. Notice that this is not something simple like replacing chemical yields. Here we discuss three topics: the effect of binaries on the evolution of 14N, the evolution of the type Ia supernova rate and the effects on the G-dwarf distribution, the link between the evolution of the r-process elements and double neutron star mergers (candidates of short gamma-ray burst objects).
description: 10 pages, 5 figures, Invited paper at IAUS240, IAUXXVI GA Prague
South Asian women in Canada and media discourse : a feminist collaborative analysis
Creators: name: Dubois, Marie-France
Publisher: name: University of British Columbia
Year: 2008

description: This paper is a critical reflection upon commonly found distortions in the representations of the lives of Canadian women of South Asian origin in the Vancouver Sun. The strategy adopted consists in presenting first, the views of three South Asian women activists who acted as collaborators and analyzed the constituted sample of articles; second, feminist anthropological readings are used to draw upon a theory of discourse which looks at news-products as active elements in the construction of reality. It is then argued that by focusing on a narrow range of topics, the prevalent media discourse encourages news readers to develop a homogenous perspective on Canadian women of South Asian origin. The depictions in the press suggest that not only are these women oppressed, but this oppression originates in elements of their own culture and assimilation is only possible by relinquishing these "oppressive" cultural traits. It is argued that the media reinforces the dominant patriarchal, racist and classist discourses prevailing in Canadian society.
Multi-Criteria Logistics-Outsourcing Decision Making Using a Quantitative Approach
Creators: name: Καλαϊτζή, Στυλιανή Σπυρίδωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ανάθεση σε τρίτους υπηρεσιών logistics
AHP μέθοδος
Επιλογή παρόχου υπηρεσιών logistics
Logistics outsourcing
Analytic Hierarchy Process
Logistics service provider selection

description: There are many models and methods designed to help decision makers. This paper presents the presentation and analysis of a Decision Making method that manages multi-stage decisions in terms of criteria. These are decisions that have specific alternatives and multiple criteria, qualitative and quantitative. Decisions like these are associated with every scientific discipline but we also encounter them in daily lives which makes their effective handling important. The presented method is called Analytic Hierarchy Process (AHP), which was developed in the 1970s by Thomas L. Saaty. It is based on comparisons between the factors that determine the respective decision. The comparisons are made on a common basis of the fundamental Saaty scale. The purpose of this study is through the hierarchical structure of the problem to determine the best supplier option from the alternatives.
description: Υπάρχουν πολλά μοντέλα και μέθοδοι που έχουν σχεδιαστεί για να βοηθήσουν τους υπεύθυνους λήψης αποφάσεων. Στην παρούσα εργασία αναφέρεται η παρουσίαση και η ανάλυση μιας μεθόδου Λήψης Αποφάσεων η οποία διαχειρίζεται αποφάσεις πολυσταδιακές ως προς τα κριτήρια. Πρόκειται για αποφάσεις οι οποίες έχουν συγκεκριμένες εναλλακτικές επιλογές και πολλαπλά κριτήρια, ποιοτικά και ποσοτικά. Αποφάσεις σαν αυτές συνδέονται με κάθε επιστημονικό κλάδο αλλά τις συναντάμε και στην καθημερινότητα, γεγονός που καθιστά σημαντικό τον αποτελεσματικό χειρισμό τους. Η μέθοδος που αναλύεται ονομάζεται Αναλυτική Ιεραρχική Διαδικασία (Analytic Hierarchy Process – AHP) , η οποία δημιουργήθηκε τη δεκαετία του 1970, από τον Thomas L. Saaty. Βασίζεται σε συγκρίσεις ανάμεσα στους παράγοντες που προσδιορίζουν την εκάστοτε απόφαση. Οι συγκρίσεις πραγματοποιούνται με κοινή βάση την θεμελιώδη κλίμακα του Saaty. Σκοπός της εργασίας είναι, μέσω της ιεραρχική δόμησης του προβλήματος, να προσδιοριστεί η καλύτερη επιλογή προμηθευτή από τις εναλλακτικές.