cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Diverging dc conductivity due to a flat band in disordered pseudospin-1 Dirac-Weyl fermions
Creators: name: Vigh, Máté
name: Oroszlány, László
name: Vajna, Szabolcs
name: San-Jose, Pablo
name: Dávid, Gyula
name: Cserti, József
name: Dóra, Balázs
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Several lattices, such as the dice or the Lieb lattice, possess Dirac cones and a flat band crossing the Dirac point, whose effective model is the pseudospin-1 Dirac-Weyl equation. We investigate the fate of the flat band in the presence of disorder by focusing on the density of states (DOS) and dc conductivity. While the central hub-site does not reveal the presence of the flat band, the sublattice resolved DOS on the non-central sites exhibits a narrow peak with height ~ 1/\sqrt{g} with g the dimensionless disorder variance. Although the group velocity is zero on the flat band, the dc conductivity diverges as ln(1/g) with decreasing disorder due to interband transitions around the band touching point between the propagating and the flat band. Generalizations to higher pseudospin are given.
description: 5 pages, 5 figures
Universality Class in Conformal Inflation
Creators: name: Kallosh, Renata
name: Linde, Andrei
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a new class of chaotic inflation models with spontaneously broken conformal invariance. Observational consequences of a broad class of such models are stable with respect to strong deformations of the scalar potential. This universality is a critical phenomenon near the point of enhanced symmetry, SO(1,1), in case of conformal inflation. It appears because of the exponential stretching of the moduli space and the resulting exponential flattening of scalar potentials upon switching from the Jordan frame to the Einstein frame in this class of models. This result resembles stretching and flattening of inhomogeneities during inflationary expansion. It has a simple interpretation in terms of velocity versus rapidity near the Kahler cone in the moduli space, similar to the light cone of special theory of relativity. This effect makes inflation possible even in the models with very steep potentials. We describe conformal and superconformal versions of this cosmological attractor mechanism.
description: 20 pages, 5 figures, two typos corrected
belostoma_functional_response_R_code
Creators: name: Gunn, Joe
name: Clements, Sarah J.
name: L. Anderson, Thomas
name: Kansman, Jessica T
name: Cianci-Gaskill, Jacob A.
Publisher: name: figshare
Year: 2021
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences
subject: 60201 Behavioural Ecology
subject: 60202 Community Ecology (excl. Invasive Species Ecology)
subject: 60204 Freshwater Ecology

description: Analysis (R code) for belostoma spp. functional response to helisoma spp.
Neuzugänge für die Gemäldegalerie, das graphische Kabinett und die stadtgeschichtliche Abteilung
Creators: name: Oellers, Adam C.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 50 (1982): Aachener Kunstblätter
Mapping the core mass function onto the stellar IMF: multiplicity matters
Creators: name: Holman, K.
name: Walch, S. K.
name: Goodwin, S. P.
name: Whitworth, A. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations indicate that the central portions of the Present-Day Prestellar Core Mass Function (CMF) and the Stellar Initial Mass Function (IMF) both have approximately log-normal shapes, but that the CMF is displaced to higher mass than the IMF by a factor F = 4+/-1. This has lead to suggestions that the shape of the IMF is directly inherited from the shape of the CMF - and therefore, by implication, that there is a self-similar mapping from the CMF onto the IMF. If we assume a self-similar mapping, it follows (i) that F = N0/eta, where eta is the mean fraction of a core's mass that ends up in stars, and N0 is the mean number of stars spawned by a single core; and (ii) that the stars spawned by a single core must have an approximately log-normal distribution of relative masses, with universal standard deviation sigma0. Observations can be expected to deliver ever more accurate estimates of F, but this still leaves a degeneracy between eta and N0; and sigma0 is also unconstrained by observation. Here we show that these parameters can be estimated by invoking binary statistics. Specifically, if (a) each core spawns one long-lived binary system, and (b) the probability that a star of mass M is part of this long-lived binary is proportional to M^alpha, current observations of the binary frequency as a function of primary mass and the distribution of mass ratios strongly favour eta = 1.0 +/- 0.3, N0 = 4.3 +/- 0.4, sigma0 = 0.3 +/- 0.03 and alpha = 0.9 +/- 0.6. The mapping from CMF to IMF is not necessarily self-similar - there are many possible motivations for a non self-similar mapping - but if it is not, then the shape of the IMF cannot be inherited from the CMF. Given the limited observational constraints currently available and the ability of a self-similar mapping to satisfy them, the possibility that the shape of the IMF is inherited from the CMF cannot be ruled out at this juncture.
description: 10 pages, 4 figures
Short desynchronization episodes prevail in synchronous dynamics of human brain rhythms
Creators: name: Ahn, Sungwoo
name: Rubchinsky, Leonid L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: 92B25 (Primary)

description: Neural synchronization is believed to be critical for many brain functions. It frequently exhibits temporal variability, but it is not known if this variability has a specific temporal patterning. This study explores these synchronization/desynchronization patterns. We employ recently developed techniques to analyze the fine temporal structure of phase-locking to study the temporal patterning of synchrony of the human brain rhythms. We study neural oscillations recorded by EEG in $α$ and $β$ frequency bands in healthy human subjects at rest and during the execution of a task. While the phase-locking strength depends on many factors, dynamics of synchrony has a very specific temporal pattern: synchronous states are interrupted by frequent, but short desynchronization episodes. The probability for a desynchronization episode to occur decreased with its duration. The transition matrix between synchronized and desynchronized states has eigenvalues close to 0 and 1 where eigenvalue 1 has multiplicity 1, and therefore if the stationary distribution between these states is perturbed, the system converges back to the stationary distribution very fast. The qualitative similarity of this patterning across different subjects, brain states and electrode locations suggests that this may be a general type of dynamics for the brain. Earlier studies indicate that not all oscillatory networks have this kind of patterning of synchronization/desynchronization dynamics. Thus the observed prevalence of short (but potentially frequent) desynchronization events (length of one cycle of oscillations) may have important functional implications for the brain. Numerous short desynchronizations (as opposed to infrequent, but long desynchronizations) may allow for a quick and efficient formation and break-up of functionally significant neuronal assemblies.
description: 7 pages, 7 figures. The paper will appear in Chaos
Lognormal intensity distribution of the FUV continuum background shortward of Ly-alpha
Creators: name: Seon, Kwang-Il
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The diffuse far-ultraviolet (FUV) continuum radiation "longward" of Ly-alpha (1216A) is well known to correlate with the dust emission at 100 um. However, it has been claimed that the FUV continuum background "shortward" of Ly-alpha shows very weak or no correlation with the 100 um emission. In this paper, the observational data of the diffuse FUV radiation by the Far Ultraviolet Spectroscopic Explorer is reexamined in order to investigate the correlation between the diffuse FUV radiation shortward of Ly-alpha and the 100 um emission. Large fluctuations were confirmed in the linear-linear correlation plots, but good correlations were found in the log-log plots. The large fluctuations in the linear-linear plots, and thus poor correlations, between the FUV and 100 um intensities were attributed to the lognormal property of the FUV intensity distribution. The standard deviation of the intensity distribution of the FUV radiation shortward of Ly-alpha was found to be sigma_log I = 0.16-0.25. The result is consistent with that obtained not only for the FUV radiation longward of 1216A, but also with the dust column density measurements of various molecular clouds. This implies that most of the diffuse FUV radiation shortward of Ly-alpha is dust-scattered light in the turbulent interstellar medium. The diffuse FUV data obtained from the Voyager missions was also investigated. However, much wider random fluctuations were found compared with the FUSE data, which is most likely due to the systematic difficulties in data reduction of the Voyager data.
description: 9 pages, 6 figure, Accepted for publication in ApJ
Digital Methods and Tools for Detecting Citational Practice in Historiographical Texts
Creators: name: Berti, Monica
Publisher: name: Zenodo
Year: 2023
Subjects: digital classics
digital philology
text reuse
Named Entity Recognition
intertextuality

description: Slides for the International Conference Sourcing the Classics. Textual Transmission and Reading Practice in Antiquity, Faculty of Classics, University of Cambridge, June 22-24, 2023
description: DFG Project number 434173983
A thermodynamic description of colloidal glasses
Creators: name: Sellitto, Mauro
name: Zamponi, Francesco
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The phase behavior of hard-sphere particles interacting with a short-ranged potential is studied in the limit of infinite space dimensionality via the Franz-Parisi approach and the replica method of disordered systems. For an attractive square-well potential the phase diagram exhibits reentrancy of the liquid-glass transition, multiple glass states and glass-glass transition. For a repulsive square shoulder potential no such special features are observed. Our results show that the Franz-Parisi approach can be consistently extended to deal with higher-order glass singularities and that interparticle attraction is crucial for complex glassy behavior in large enough dimensions, at least for monodisperse systems.
description: 5 pages, 6 figures
title: Income Effects of Disability Benefits
Creators: name: Becker, Sebastian
name: Gehlen, Annica
name: Geyer, Johannes
name: Haan, Peter
Publisher: name: Hertie School
Year: 2024

description: We provide novel evidence about the incentive and welfare effects of an increase in the generosity of disability benefits. Importantly, a unique policy variation in Germany allows us to isolate the income effect of a change in benefit generosity. We leverage this quasi-experimental policy variation using an RD design to estimate the effect of increasing disability benefits on employment, earnings, labor market transitions, and mortality outcomes using administrative data on the universe of new disability benefit recipients. Contrary to previous literature, our analysis reveals no significant impact on the employment and earnings of DI recipients due to the increased benefits. However, we find a sizable effect of the probability of returning to the labor market. We find no effects on recipient mortality six years after benefit award, but estimates imply a notable reduction in poverty risk, highlighting meaningful welfare implications of increased generosity.
description: Berlin School of Economics Discussion Papers; 50
Surface term, Virasoro algebra, and Wald entropy of black holes in higher-curvature gravity
Creators: name: Zhang, Shao-Jun
name: Wang, Bin
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, in the Einstein gravity, Majhi and Padmanabhan proposed a straightforward and transparent way in obtaining the Bekenstein-Hawking entropy by using the approach based on the Virasoro algebra and central charge. In this work, we generalize their approach to the modified gravity with higher curvature corrections and show that their approach can successfully lead to the corresponding Wald entropy in the higher curvature gravity. Our result shows that the approach is physically general.
description: v1: 12 pages, no figures, REVTeX 4.0; v2: no changes, this manuscript is accepted for publication in PRD; v3: English polished, match published version
Efficient Reinforcement Learning for High Dimensional Linear Quadratic Systems
Creators: name: Ibrahimi, Morteza
name: Javanmard, Adel
name: Van Roy, Benjamin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study the problem of adaptive control of a high dimensional linear quadratic (LQ) system. Previous work established the asymptotic convergence to an optimal controller for various adaptive control schemes. More recently, for the average cost LQ problem, a regret bound of ${O}(\sqrt{T})$ was shown, apart form logarithmic factors. However, this bound scales exponentially with $p$, the dimension of the state space. In this work we consider the case where the matrices describing the dynamic of the LQ system are sparse and their dimensions are large. We present an adaptive control scheme that achieves a regret bound of ${O}(p \sqrt{T})$, apart from logarithmic factors. In particular, our algorithm has an average cost of $(1+\eps)$ times the optimum cost after $T = \polylog(p) O(1/\eps^2)$. This is in comparison to previous work on the dense dynamics where the algorithm requires time that scales exponentially with dimension in order to achieve regret of $\eps$ times the optimal cost. We believe that our result has prominent applications in the emerging area of computational advertising, in particular targeted online advertising and advertising in social networks.
description: 16 pages
Structure of two-component Bose-Einstein condensates with respective vortex-antivortex superposition states
Creators: name: Wen, Linghua
name: Qiao, Yongjun
name: Xu, Yong
name: Mao, Li
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the phase structure of two-component Bose-Einstein condensates (BECs) with repulsive intra- and interspecies interactions in the presence of respective vortex-antivortex superposition states (VAVSS). We show that different winding numbers of vortex and antivortex and different intra- and interspecies interaction strengths may lead to different phase configurations, such as fully separated phases, inlaid separated phases, asymmetric separated phase, and partially mixed phases, where the density profile of each component displays a petal-like (or modulated petal-like) structure. A phase diagram is given for the case of equal unit winding numbers of the vortex and antivortex in respective components, and it is shown that conventional criterion for phase separation of two-component BECs is not applicable for the present system due to the VAVSS. In addition, our nonlinear stability analysis indicates that the typical phase structures of two-component BECs with VAVSS allow to be detected in experiments. Moreover, for the case of unequal winding numbers of the vortex and antivortex in respective components, we find that each component in any of the possible phase structures is in a cluster state of vortices and antivortices, where the topological defects appear in the form of singly quantized visible vortex, or hidden vortex, or ghost vortex, depending on the specific parameters of the system. Finally, a general rule between the vortex-antivortex cluster state and the winding numbers of vortex and antivortex is revealed.
description: 8pages,5figures,accepted for publication in Physical Review A
Lobopelta Mayr 1862
Creators: name: Forel, A.
Publisher: name: L'Imprimerie Nationale
Year: 1891
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Lobopelta

description: Genre LOBOPELTA.
Lobopelta, Mayr, Verh. Zool. und Bot. Gesellsch. zu Wien (1862).
[[worker]]. Mandibules aplaties, à bords parallèles ou subtriangulaires, tronquees obliquement à l'extrémité. Palpes de quatre articles. Epistome avancé en arrière en angle aigu entre les articulations des antennes, et en avant en disque tectiforme, triangulaire, en général fortement caréné. Pédicule avec un n œ ud ou une écaille. Crochets des tarses pectines.
[[queen]]. Inconnue.
[[male]]. Mandibules très petites, parfois presque rudimentaires, sans dents au bord, terminées ou non par une dent, triangulaires ou à côtés paralleles, parfois aplaties. Leurs extrémités ne s'atteignent pas quand elles sont fermées. Epistome plus large que long, non prolongé entre les articulations des antennes, mais parfois prolongé devant en lobe court, plus ou moins arrondi. Antennes filiformes, de treize articles. Scape tantôt très court, à peine trois fois plus long que large (L.fallax, L. distinguenda), tantôt assez long (L. chinensis). Premier article du funicule très court, plus large que long ou à peine plus long que large. Le second article du funicule est le plus long; les autres vont en diminuant jusqu'à l'extrémité. Aire frontale triangulaire, nettement imprimée. Le mésonotum a en gé- néral les deux sillons convergents (très nets chez la L. chinensis, faibles chez la L. distinguenda, nuls chez la L. fallax). Métanotum bas, allongé, à face déclive faiblement ou point délimitée. Pédicule de forme variable. Abdomen allongé, étroit, plus ou moins faiblement rétréci après le premier segment, quelquefois presque pas. Pygidium arrondi ou en triangle, sans épine. Valvules génitales extérieures plus ou moins en lame de couteau ou triangulaires, plus ou moins arrondies ou pointues à l'extrémité. Ailes avec deux cellules cubitales fermées, une cellule discoïdale et une cellule radiale fermée. Crochets des tarses fortement pectines. (Cette description ne concorde qu'en partie avec celle de Mayr [Austral. Formic.], basée sur le [[male]] de la L. fallax; je l'ai basée sur les [[male]] de trois espèces des Indes.)
description: Published as part of Forel, A., 1891, Histoire naturelle des Hymenopteres. Deuxieme partie: Les Formicides., pp. 1-231 in Histoire Physique, Naturelle et Politique de Madagascar., Paris :L'Imprimerie Nationale on page 118, DOI: 10.5281/zenodo.9896
Phase fluctuations versus Gaussian fluctuations in optimally-doped YBa$_2$Cu$_3$O$_7$
Creators: name: Li, Lu
name: Wang, Yayu
name: Ong, N. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We analyze recent torque measurements of the magnetization $M_d$ vs. magnetic field $H$ in optimally doped YBa$_2$Cu$_3$O$_{7-y}$ (OPT YBCO) to argue against a recent proposal by Rey et al that the magnetization results above $T_c$ are consistent with Gaussian fluctuations. We find that, despite its strong interlayer coupling, OPT YBCO displays an anomalous non-monotonic dependence of $M_d$ on $H$ which represents direct evidence for the locking of the pair wavefunction phase $θ_n$ at $T_c$ and the subsequent unlocking by a relatively weak $H$. These unusual features characterize the unusual nature of the transition to the Meissner state in cuprate superconductors. They are absent in low-$T_c$ superconductors to our knowledge. We also stress the importance of the vortex liquid state, as well as the profiles of the melting field $H_m(T)$ and the upper critical field curve $H_{c2}(T)$ in the $T$-$H$ plane. Contrary to the claims of Rey et al, we show that the curves of the magnetization and the Nernst signal illustrate the inaccessibility of the $H_{c2}$ line near $T_c$. The prediction of the $H_{c2}$ line by Rey et al is shown to be invalid in OPT YBCO.
description: 6 pages, 6 figures
Through thick and thin: Structure of the Galactic thick disc from extragalactic surveys
Creators: name: Kordopatis, G.
name: Hill, V.
name: Irwin, M.
name: Gilmore, G.
name: Wyse, R. F. G.
name: Tolstoy, E.
name: de Laverny, P.
name: Recio-Blanco, A.
name: Battaglia, G.
name: Starkenburg, E.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We aim to understand the accretion history of the Milky Way by exploring the vertical and radial properties of the Galactic thick disc. We study the chemical and kinematic properties of roughly a thousand spectra of faint magnitude foreground Galactic stars observed serendipitously during extra-galactic surveys in four lines-of-sight: three in the southern Galactic hemisphere (surveys of the Carina, Fornax and Sculptor dwarf spheroidal galaxies) and one in the northern Galactic hemisphere (a survey of the Sextans dwarf spheroidal galaxy). The foreground stars span distances up to 3kpc from the Galactic plane and Galactocentric radii up to 11kpc. Only three lines-of-sight have a sufficient number of foreground stars for a robust analysis. Towards Sextans in the Northern Galactic hemisphere and Sculptor in the South, we measure a consistent decrease in mean metallicity with height from the Galactic plane, suggesting a chemically symmetric thick disc. This decrease can either be due to an intrinsic thick disc metallicity gradient, or simply due to a change in the thin disc/thick disc population ratio and no intrinsic metallicity gradients for the thick disc. We favour the latter explanation. In contrast, we find evidence of an unpredicted metal-poor population in the direction of Carina. This population was earlier detected by Wyse et al. (2006), but our more detailed analysis provides robust estimates of its location (|Z|<1kpc), metallicity (-2
description: Accepted in A&A, 17 pages, 18 figures
title: Αποκατάσταση Βιομηχανικού Κτιρίου στην Αθήνα και Επανάχρηση σε Καφέ - Βιβλιοθήκη
title: Restoration of an Industrial Building in Athens and a Revolution in a Cafe - Library
titleType: AlternativeTitle
Creators: name: Μαϊοπούλου, Ανθούσα-Μαρία
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Γυάλινος κύβος
Καφέ βιβλιοθήκη
Ηubs νέων επαγγελματιών
Επανάχρηση βιομηχανικού κτηρίου
Κάθετη φύτευση

description: Αφετηρία της παρούσας πτυχιακής εργασίας αποτέλεσε η επανάχρηση και αποκατάσταση των βιομηχανικών κτιρίων και ο τρόπος με τον οποίο εντάσσεται μια νέα χρήση σε ένα βιομηχανικό κέλυφος με σεβασμό στην ιστορία και την ιδιαίτερη αρχιτεκτονική του. Αρχικά, μελετώνται οι όροι της βιομηχανικής κληρονομιάς και αρχαιολογίας, ακολουθεί μια ανάλυση σχετικά με το βαθμό επέμβασης στα βιομηχανικά κελύφη, ενώ έπειτα παρουσιάζονται παραδείγματα επανάχρησης βιομηχανικών κτιρίων από την Ελλάδα και το εξωτερικό. Ακολουθεί η μελέτη του επιλεγμένου κτιρίου και ο σχεδιασμός του που καλείται να εντάξει μέσα στο χώρο την ιδέα των κύβων σε συνδυασμό με τη διαφάνεια. Τέλος, σημαντικό ρόλο διαδραματίζει η διατήρηση πολλών βιομηχανικών στοιχείων του κτιρίου σε συνδυασμό με την πρόσθεση νέων υλικών και υφών που χρησιμοποιήθηκαν για να ολοκληρώσουν τη νέα ιδέα και χρήση που θα στεγάσει το κτίριο με σεβασμό πάντα στο παρελθόν του.
Ginzburg-Landau analysis of the critical temperature and the upper critical field for three-band superconductors
Creators: name: Yerin, Y.
name: Drechsler, S. -L.
name: Fuchs, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Using the microscopic formalism of Eilenberger equations, a three-band Ginzburg-Landau theory for the intraband dirty limit and clean interband scattering case is derived. Within the framework of this three-band Ginzburg-Landau theory, expressions for the critical temperature Tc and the temperature dependence of the upper critical field H_c2 are obtained. Based on some special cases of the matrix of interaction constants, we demonstrate the influence of the sign of the interband interaction on the critical temperature and the upper critical field as compared with a two-band superconductor where it plays no role. We study also analytically and numerically the effect of its magnitude.
description: 24 pages, 5 figures 2 new references numbered as [35], [36] in the revised version of the paper have been added; corrected typos and some wording in the whole text
Low-Reynolds number swimming in a capillary tube
Creators: name: Zhu, Lailai
name: Lauga, Eric
name: Brandt, Luca
Publisher: name: arXiv
Year: 2013
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Biological Physics (physics.bio-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We use the boundary element method to study the low-Reynolds number locomotion of a spherical model microorganism in a circular tube. The swimmer propels itself by tangen- tial or normal surface motion in a tube whose radius is on the order of the swimmer size. Hydrodynamic interactions with the tube walls significantly affect the average swimming speed and power consumption of the model microorganism. In the case of swimming parallel to the tube axis, the locomotion speed is always reduced (resp. increased) for swimmers with tangential (resp. normal) deformation. In all cases, the rate of work nec- essary for swimming is increased by confinement. Swimmers with no force-dipoles in the far field generally follow helical trajectories, solely induced by hydrodynamic interactions with the tube walls, and in qualitative agreement with recent experimental observations for Paramecium. Swimmers of the puller type always display stable locomotion at a lo- cation which depends on the strength of their force dipoles: swimmers with weak dipoles (small α) swim in the centre of the tube while those with strong dipoles (large α) swim near the walls. In contrast, pusher swimmers and those employing normal deformation are unstable and end up crashing into the walls of the tube. Similar dynamics is observed for swimming into a curved tube. These results could be relevant for the future design of artificial microswimmers in confined geometries.
description: 32 pages, 23 figures
Scattering in the pion-nucleon negative parity channel in lattice QCD
Creators: name: Lang, C. B.
name: Verduci, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the coupled pion-nucleon system (negative parity, isospin 1/2) based on a lattice QCD simulation for nf=2 mass degenerate light quarks. Both, standard 3-quarks baryon operators as well as meson-baryon (4+1)-quark operators are included. This is an exploratory study for just one lattice size and lattice spacing and at a pion mass of 266 MeV. Using the distillation method and variational analysis we determine energy levels of the lowest eigenstates. Comparison with the results of simple 3-quark correlation studies exhibits drastic differences and a new level appears. A clearer picture of the negative parity nucleon spectrum emerges. For the parameters of the simulation we may assume elastic s-wave scattering and can derive values of the phase shift.
description: 12 pages, 12 figures, corrections, final version
Fractional Helical Liquids and Non-Abelian Anyons in Quantum Wires
Creators: name: Oreg, Yuval
name: Sela, Eran
name: Stern, Ady
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study one dimensional wires with spin-orbit coupling. We show that in the presence of Zeeman field and strong electron-electron interaction a clean wire may form fractional helical liquid states with phenomenology similar to fractional quantum Hall liquids. Most notably, the wire's two terminal conductance is predicted to show fractional quantized conductance plateaus at low electron density. When the system is proximity-coupled to a superconductor, fractional Majorana bound states may be stabilized. We discuss how disorder destabilizes these fractional phases. Possible experimental realizations of similar states in double wire systems are discussed.
description: 8 pages, 4 figures
Space-Time Domain Decomposition Methods for Diffusion Problems in Mixed Formulations
Creators: name: Hoang, Thi Thao Phuong
name: Jaffré, Jérôme
name: Japhet, Caroline
name: Kern, Michel
name: Roberts, Jean
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper is concerned with global-in-time, nonoverlapping domain decomposition methods for the mixed formulation of the diffusion problem. Two approaches are considered: one uses the time-dependent Steklov-Poincaré operator and the other uses Optimized Schwarz Waveform Relaxation (OSWR) based on Robin transmission conditions. For each method, a mixed formulation of an interface problem on the space-time interfaces between subdomains is derived, and different time grids are employed to adapt to different time scales in the subdomains. Demonstrations of the well-posedness of the subdomain problems involved in each method and a convergence proof of the OSWR algorithm are given for the mixed formulation. Numerical results for 2D problems with strong heterogeneities are presented to illustrate the performance of the two methods.
Mao And US Ambassadors
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2018
Subjects: World War (1939-1945)
Sino-Japanese War (1937-1945)

description: CT-45-70,228, 8/28/45 Photo Gilliland, Mao Tse Tung, North China Communist party chairman, and U.S. ambassador Patrick J. Hurley chat with party officials upon arrival at Chungking from Yan'an for a conference with central government chiefs.
LA OBRA DE ARTE EN LA ÉPOCA DE SU CONTENIDO: REFLEXIONES EN TORNO A LA DEFINICIÓN DE CONTENIDO.
Creators: name: Roude, Jessica
name: Del Giorgio Solfa, Federico
Publisher: name: figshare
Year: 2023
Subjects: Digital and electronic media art

description: This article explores the emerging aspects of design around Industry 4.0 in the context of the current digital revolution. The digital technologies involved are categorized, describing some key definitions to understand the physical relationships between humans and these new technologies, especially analyzing the paradigm of technological prostheses. A conceptual journey through the classic authors of design and cultural industries is shown, to finally integrate some of the theories enunciated with the idea of bringing some light to the time of the content and the narrative of the work, using a selection of works to exemplify.
The QCD sign problem as a total derivative
Creators: name: Greensite, Jeff
name: Myers, Joyce C.
name: Splittorff, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the distribution of the complex phase of the fermion determinant in QCD at nonzero chemical potential and examine the physical conditions under which the distribution takes a Gaussian form. We then calculate the baryon number as a function of the complex phase of the fermion determinant and show 1) that the exponential cancellations produced by the sign problem take the form of total derivatives 2) that the full baryon number is orthogonal to this noise. These insights allow us to define a self-consistency requirement for measurements of the baryon number in lattice simulations.
description: 5 pages, reference added, version to appear in PRD rapid communications
The prospects of forming ultracold molecules in $^2Σ$ states by magnetoassociation of alkali-metal atoms with Yb
Creators: name: Brue, Daniel A.
name: Hutson, Jeremy M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We explore the feasibility of producing ultracold diatomic molecules with nonzero electric and magnetic dipole moments by magnetically associating two atoms, one with zero electron spin and one with nonzero spin. Feshbach resonances arise through the dependence of the hyperfine coupling on internuclear distance. We survey the Feshbach resonances in diatomic systems combining the nine stable alkali-metal isotopes with those of Yb, focussing on the illustrative examples of RbYb and CsYb. We show that the resonance widths may expressed as a product of physically comprehensible terms in the framework of Fermi's Golden Rule. The resonance widths depend strongly on the background scattering length, which may be adjusted by selecting the Yb isotope, and on the hyperfine coupling constant and the magnetic field. In favorable cases the resonances may be over 100 mG wide.
description: 14 pages, 8 Figures
Clock-controlled emission of single-electron wavepackets in a solid-state circuit
Creators: name: Fletcher, J. D.
name: Kataoka, M.
name: Howe, H.
name: Pepper, M.
name: See, P.
name: Giblin, S. P.
name: Griffiths, J. P.
name: Jones, G. A. C.
name: Farrer, I.
name: Ritchie, D. A.
name: Janssen, T. J. B. M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate the transmission of single electron wavepackets from a clock-controlled source through an empty high-energy edge channel. The quantum dot source is loaded with single electrons which are then emitted with high kinetic energy ($\sim$150 meV). We find at high magnetic field that these electron can be transported over several microns without inelastic electron-electron or electron-phonon scattering. Using a time-resolved spectroscopic technique, we measure the electron energy and wavepacket size at picosecond time scales. We also show how our technique can be used to switch individual electrons into different paths.
Observation of Asymmetric Transport in Structures with Active Nonlinearities
Creators: name: Bender, N.
name: Factor, S.
name: Bodyfelt, J. D.
name: Ramezani, H.
name: Ellis, F. M.
name: Kottos, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A mechanism for asymmetric transport based on the interplay between the fundamental symmetries of parity (P) and time (T) with nonlinearity is presented. We experimentally demonstrate and theoretically analyze the phenomenon using a pair of coupled van der Pol oscillators, as a reference system, one with anharmonic gain and the other with complementary anharmonic loss; connected to two transmission lines. An increase of the gain/loss strength or the number of PT-symmetric nonlinear dimers in a chain, can increase both the asymmetry and transmittance intensities.
description: 5 pages, 5 figures
PHOBIC: Perfect Hashing With Optimized Bucket Sizes and Interleaved Coding
Creators: name: Hermann, Stefan
name: Lehmann, Hans-Peter
name: Pibiri, Giulio Ermanno
name: Sanders, Peter
name: Walzer, Stefan
Publisher: name: Schloss Dagstuhl - Leibniz-Zentrum für Informatik (LZI)
Year: 2024
Subjects: Compressed Data Structures
Minimal Perfect Hashing
GPU
Theory of computation → Data compression
Information systems → Point lookups

description: A minimal perfect hash function (or MPHF) maps a set of n keys to [n] : = {1, …, n} without collisions. Such functions find widespread application e.g. in bioinformatics and databases. In this paper we revisit PTHash - a construction technique particularly designed for fast queries. PTHash distributes the input keys into small buckets and, for each bucket, it searches for a hash function seed that places its keys in the output domain without collisions. The collection of all seeds is then stored in a compressed way. Since the first buckets are easier to place, buckets are considered in non-increasing order of size. Additionally, PTHash heuristically produces an imbalanced distribution of bucket sizes by distributing 60% of the keys into 30% of the buckets.
Our main contribution is to characterize, up to lower order terms, an optimal choice for the expected bucket sizes, improving construction throughput for space efficient configurations both in theory and practice. Further contributions include a new encoding scheme for seeds that works across partitions of the data structure and a GPU parallelization.
Compared to PTHash, PHOBIC is 0.17 bits/key more space efficient for same query time and construction throughput. For a configuration with fast queries, our GPU implementation can construct an MPHF at 2.17 bits/key in 28 ns/key, which can be queried in 37 ns/query on the CPU.
Risiko Pembukaan Sekolah
Creators: name: Dhoni Zustiyantoro
Publisher: name: Zenodo
Year: 2020
Subjects: Pembelajaran masa pandemi Covid-19, pembukaan sekolah masa pandemi

description: MESKI Kementerian Pendidikan dan Kebudayaan menyatakan belum akan membuka sekolah untuk belajar siswa pada tahun ajaran 2020/2021 mulai minggu ketiga Juli mendatang, kalangan orang tua beberapa minggu ini mengalami keresahan. Wacana pembukaan sekolah di masa darurat kesehatan dinilai sangat berisiko karena vaksin yang belum ditemukan dan anak termasuk kelompok rentan terhadap Covid-19. Per 1 Juni 2020, sebanyak 2,3 persen kasus positif korona adalah balita (0-5 tahun) dan 5,6 persen anak-anak (6-17 tahun).
Estimation and correction of wavefront aberrations using the self-coherent camera: laboratory results
Creators: name: Mazoyer, J.
name: Baudoz, P.
name: Galicher, R.
name: Mas, M.
name: Rousset, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Direct imaging of exoplanets requires very high contrast levels, which are obtained using coronagraphs. But residual quasi-static aberrations create speckles in the focal plane downstream of the coronagraph which mask the planet. This problem appears in ground-based instruments as well as in space-based telescopes. An active correction of these wavefront errors using a deformable mirror upstream of the coronagraph is mandatory, but conventional adaptive optics are limited by differential path aberrations. Dedicated techniques have to be implemented to measure phase and amplitude errors directly in the science focal plane. First, we propose a method for estimating phase and amplitude aberrations upstream of a coronagraph from the speckle complex field in the downstream focal plane. Then, we present the self-coherent camera, which uses the coherence of light to spatially encode the focal plane speckles and retrieve the associated complex field. This enable us to estimate and compensate in a closed loop for the aberrations upstream of the coronagraph. We conducted numerical simulations as well as laboratory tests using a four-quadrant phase mask and a 32x32 actuator deformable mirror. We demonstrated in the laboratory our capability to achieve a stable closed loop and compensate for phase and amplitude quasi-static aberrations. We determined the best-suited parameter values to implement our technique. Contrasts better than 10-6 between 2 and 12 lambda/D and even 3.10-7 (RMS) between 7 and 11 lambda/D were reached in the focal plane. It seems that the contrast level is mainly limited by amplitude defects created by the surface of the deformable mirror and by the dynamic of the detector. These results are promising for a future application to a dedicated space mission for exoplanet characterization. A number of possible improvements have been identified.
description: 14 pages, 16 figures, accepted in Astronomy and Astrophysics, 2013, 2nd version after language-editor corrections
Automating vessels berthing, docking and stevedorage operations: The MOSES project
Creators: name: Krikigianni, Eleni S.
name: Kanellopoulos, Giannis
name: Kostovasili, Margarita
name: Amditis, Angelos
name: Ventikos, Nikolaos
name: Louzis, Konstantinos
name: Latsa, Evangelia
Publisher: name: Zenodo
Year: 2023

description: The Physical Internet Initiative aims at transforming the way physical objects are moved, stored, realized, supplied, and used, pursuing global logistics efficiency and sustainability. Originating from Professor Benoit Montreuil in 2006, this groundbreaking vision, revolutionizing current paradigms, has stirred great interest from scientific, industrial as well as governmental communities. The International Physical Internet Conference (IPIC) aims to provide an open forum for researchers, industry representatives, government officials, and citizens to together explore, discuss, introduce leading-edge concepts, methodologies, recent projects, technological advancements, start-up initiatives, for current and future Physical Internet implementation. Conference topics include Logistics Nodes, Logistics Networks, System of Logistic Networks, Access and Adoption, Governance. New business models, enabling technologies, and experimentations already underway will be presented, making this meeting a unique opportunity to learn, network, and discuss the latest results and challenges about interconnected logistics. MOSES was presented, during the IPIC 2023, on the 15th of June, during the session 6.C 5G in Ports and Vessel Automation (STREAM C:Digitalization,automation and datasharing), by Elena Krikigianni from SEABility Ltd, who delivered a presentation entitled: “Automating vessels berthing, docking and stevedorage operations: The MOSES project“. The conference agenda is available here.
Increasing Air Traffic Effect on Developing Regional and Mega-hub Airports in Asia-Pacific Region
Creators: name: Sendo, Kosuke
Publisher: name: figshare
Year: 2021
Subjects: subject: 150308 International Business
subject: FOS: Economics and business

description: With the skies busier than ever, air traffic needs to be addressed properly because it affects various other determinants of a national economy. The commercial flights are set to double in the next decade, the eventual method to tackle the problems raised due to air traffic in airport management systems need upscaling. It has to be made into consideration that aviation or air traffic plays a vital role in nourishing and strengthening the lifestyle of communities as well as the local economy in the form of employment opportunities, a boost to the GDP, educational services, and an uplift to the quality of lifestyle. The everyday increase in the rate of customers' demand for air travel services has highlighted the problem of the need of better utilization of air space. With the induction of new types of unmanned and autonomous aircrafts the need of revamping the system is also necessary. Recommendations on this matter are discussed further. In Dec 1903, the air age arrived, when the Wright Brothers try to fly and succeeded the aircraft above the ground surface i.e., more than 120 feet at Kitty Hawk, N.C., the U.S state. As time passed the number of aviation industry increase the numeral amount of aeroplane or aircraft day by day, as a result, the rate of traffic escalates exponentially. The main equitable of aviation is to provide the opportunities regarding the less time effectiveness and comfortable environment to establish a destination. On the other hand, it has also a dependency on the “economy” (i.e, less expensive traveling). The above-mentioned postulates show the increase in the rate of customers demanding a more suitable air traveling services, which also increases the number of the aeroplane and directly related to the increase in the development of airports. Thus, for such a problem solution it requires more outstanding services and control of air traffic. This chapter discussed the research objectives by linking the rate of air traffic control and the literature associated with objectives.
Horizontal-branch morphology and multiple stellar populations in the anomalous globular cluster M22
Creators: name: Marino, A. F.
name: Milone, A. P.
name: Lind, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: M22 is an anomalous globular cluster that hosts two groups of stars with different metallicity and s-element abundance. The star-to-star light-element variations in both groups, with the presence of individual Na-O and C-N anticorrelations, demonstrates that this Milky-Way satellite has experienced a complex star-formation history. We have analysed FLAMES/UVES spectra for seven stars covering a small color interval, on the reddest horizontal-branch (HB) portion of this cluster and investigated possible relations between the chemical composition of a star and its location along the HB. Our chemical abundance analysis takes into account effects introduced by deviations from the local-thermodynamic equilibrium (NLTE effects), that are significant for the measured spectral lines in the atmospheric parameters range spanned by our stars. We find that all the analysed stars are barium-poor and sodium-poor, thus supporting the idea that the position of a star along the HB is strictly related to the chemical composition, and that the HB-morphology is influenced by the presence of different stellar populations.
description: 21 pages, 3 figures, accepted for publication in ApJ
Competition between three-sublattice order and superfluidity in the quantum 3-state Potts model of ultracold bosons and fermions on a square optical lattice
Creators: name: Messio, Laura
name: Corboz, Philippe
name: Mila, Frédéric
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a quantum version of the three-state Potts model that includes as special cases the effective models of bosons and fermions on the square lattice in the Mott insulating limit. It can be viewed as a model of quantum permutations with amplitudes J_parallel and J_perp for identical and different colors, respectively. For J_parallel=J_perp>0, it is equivalent to the SU(3) Heisenberg model, which describes the Mott insulating phase of 3-color fermions, while the parameter range J_perp0 properties for J_perp<0. For dominant antiferromagnetic J_parallel interactions, a three-sublattice long-range ordered stripe state is selected out of the ground state manifold of the antiferromagnetic Potts model by quantum fluctuations. Upon increasing |J_perp|, this state is replaced by a uniform superfluid for J_perp<0, and by an exotic three-sublattice superfluid followed by a two-sublattice superfluid for J_perp>0. The transition out of the uniform superfluid (that can be realized with bosons) is shown to be a peculiar type of Kosterlitz-Thouless transition with three types of elementary vortices.