cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the integrability of a generalized variable-coefficient Kadomtsev-Petviashvili equation
Creators: name: Tian, Shou-Fu
name: Zhang, Hong-Qing
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35Q51, 35Q53, 35C99, 68W30, 74J35

description: By considering the inhomogeneities of media, a generalized variable-coefficient Kadomtsev-Petviashvili (vc-KP) equation is investigated, which can be used to describe many nonlinear phenomena in fluid dynamics and plasma physics. In this paper, we systematically investigate complete integrability of the generalized vc-KP equation under a integrable constraint condition. With the aid of a generalized Bells polynomials, its bilinear formulism, bilinear Bäcklund transformations, Lax pairs and Darboux covariant Lax pairs are succinctly constructed, which can be reduced to the ones of several integrable equations such as KdV, cylindrical KdV, KP, cylindrical KP, generalized cylindrical KP, non-isospectral KP equations etc. Moreover, the infinite conservation laws of the equation are found by using its Lax equations. All conserved densities and fluxes are expressed in the form of accurate recursive formulas. Furthermore, an extra auxiliary variable is introduced to get the bilinear formulism, based on which, the soliton solutions and Riemann theta function periodic wave solutions are presented. And the influence of inhomogeneity coefficients on solitonic structures and interaction properties are discussed for physical interest and possible applications by some graphic analysis. Finally, a limiting procedure is presented to analyze in detail, asymptotic behavior of the periodic waves, and the relations between the periodic wave solutions and soliton solutions.
description: 30pages, 8 figures, accepted by Journal of Physics A: Mathematical and Theoretical (December, 2011)
A quantum computation architecture using optical tweezers
Creators: name: Weitenberg, Christof
name: Kuhr, Stefan
name: Mølmer, Klaus
name: Sherson, Jacob F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present a complete architecture for scalable quantum computation with ultracold atoms in optical lattices using optical tweezers focused to the size of a lattice spacing. We discuss three different two-qubit gates based on local collisional interactions. The gates between arbitrary qubits require the transport of atoms to neighboring sites. We numerically optimize the non-adiabatic transport of the atoms through the lattice and the intensity ramps of the optical tweezer in order to maximize the gate fidelities. We find overall gate times of a few 100 us, while keeping the error probability due to vibrational excitations and spontaneous scattering below 10^3. The requirements on the positioning error and intensity noise of the optical tweezer and the magnetic field stability are analyzed and we show that atoms in optical lattices could meet the requirements for fault-tolerant scalable quantum computing.
description: 10 pages, 6 figures
Non linear problems in dissipative models
Creators: name: De Angelis, M.
name: Renno, G. Fiore. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 82D55-35K25-76N20

description: Aim of the paper is the qualitative analysis of a quasi-linear parabolic third order equation, which describes the evolution in a large class of dissipative models. As examples of some typical boundary problems, both Dirichlet's and Neumann's type boundary conditions are examined. In the linear case, the related Green functions are explicitly determined, together with rigorous estimates of their behavior when the parameter of dissipation is vanishing. These results are basic to study the integral equations to which the non linear problems can be reduced. Moreover, boundary layer estimates can be determined too.
description: 14pages
Revisiting resistance: conversations with anti-racism educators
Creators: name: Johnston, Brenda
Publisher: name: University of Calgary
Year: 2003

description: Bibliography: p. 138-144
description: This research project was largely influenced by my experiences over the last 10-15 years as a consultant who developed and facilitated anti-racism workshops in the Calgary area. A recurring problem is persistent resistance from workshop participants. For the purpose of this research, I conceptualize resistance as unwillingness on the part of white people (and of some aboriginal people and people of color), to understand racism as a systemic issue involving individual and institutional power, privilege and oppression. In the project, I use the terms aboriginal people, people of color, and white people because racism affects these groups in significantly different ways. My intension in the project is not to generalize about these groups of people, but rather to use these terms in a political way to describe how people are affected by and/or affect racism and resistance. The research presented in this study is a synthesis of the literature review and conversations with anti-racism educators in Calgary.
Seeing Unseeability to See the Unseeable
Creators: name: Narayanaswamy, Siddharth
name: Barbu, Andrei
name: Siskind, Jeffrey Mark
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: We present a framework that allows an observer to determine occluded portions of a structure by finding the maximum-likelihood estimate of those occluded portions consistent with visible image evidence and a consistency model. Doing this requires determining which portions of the structure are occluded in the first place. Since each process relies on the other, we determine a solution to both problems in tandem. We extend our framework to determine confidence of one's assessment of which portions of an observed structure are occluded, and the estimate of that occluded structure, by determining the sensitivity of one's assessment to potential new observations. We further extend our framework to determine a robotic action whose execution would allow a new observation that would maximally increase one's confidence.
On the use of projectors for Hamiltonian systems and their relationship with Dirac brackets
Creators: name: Chandre, Cristel
name: De Guillebon, Loïc
name: Back, Aurore
name: Tassi, Emanuele
name: Morrison, Philip
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The role of projectors associated with Poisson brackets of constrained Hamiltonian systems is analyzed. Projectors act in two instances in a bracket: in the explicit dependence on the variables and in the computation of the functional derivatives. The role of these projectors is investigated by using Dirac's theory of constrained Hamiltonian systems. Results are illustrated by three examples taken from plasma physics: magnetohydrodynamics, the Vlasov-Maxwell system, and the linear two-species Vlasov system with quasineutrality.
Finite-temperature dynamics of matter-wave dark solitons in linear and periodic potentials: an example of an anti-damped Josephson junction
Creators: name: Shen, Y.
name: Kevrekidis, P. G.
name: Whitaker, N.
name: Karachalios, N. I.
name: Frantzeskakis, D. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study matter-wave dark solitons in atomic Bose-Einstein condensates at finite temperatures, under the effect of linear and periodic potentials. Our model, namely a dissipative Gross-Pitaevskii equation, is treated analytically by means of dark soliton perturbation theory, which results in a Newtonian equation of motion for the dark soliton center. This reduced model, which incorporates an effective washboard potential and an anti-damping term, constitutes an example of an anti-damped Josephson junction. We present a qualitative (local and global) analysis of the equation of motion. For sufficiently small wavenumbers of the periodic potential and weak linear potentials, the results are found to be in good agreement with pertinent ones obtained via a Bogoliubov-de Gennes analysis and direct numerical simulations.
X-ray Observation of Mars with Suzaku at Solar Minimun
Creators: name: Ishikawa, Kumi
name: Ezoe, Yuichiro
name: Ohashi, Takaya
name: Terada, Naoki
name: Futaana, Yoshifumi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Mars was observed in X-rays during April 3-5 2008 for 82 ksec with the Japanese Suzaku observatory. Mars has been known to emit X-rays via the scattering of solar X-rays and via the charge exchange between neutral atoms in the exosphere and solar wind ions. Past theoretical studies suggest that the exospheric neutral density may vary by a factor of up to 10 over the solar cycle. To investigate a potential change of the exospheric charge exchange emission, Mars was observed with Suzaku at solar minimum. Significant signals were not detected at the position of Mars in the energy band of 0.2-5 keV. A 2 sigma upper limit of the O VII line flux in 0.5-0.65 keV was 4.3$\times10^{-5}$ ph cm$^{-2}$ s$^{-1}$. Comparing this upper limit to the past Chandra and XMM-Newton observations conducted near solar maximum, it was found that the exospheric density at solar minimum does not exceed that near solar maximum by more than 6-70 times.
description: 17 pages, 7 figures, accepted for publication in PASJ
Spin contribution to light baryons in different large-$N$ limits
Creators: name: Buisseret, Fabien
name: Matagne, Nicolas
name: Semay, Claude
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the spin contribution to light baryon ground states in three inequivalent large-$N$ limits: 't Hooft, QCD antisymmetric and QCD symmetric. Our framework is a constituent quark model with a relativistic Hamiltonian containing a stringlike confinement and a one-gluon exchange term. Two spin-dependent potentials are considered and treated as perturbations: the color magnetic interaction stemming from the one-gluon exchange process and the chiral boson exchange interaction. We analytically prove that the spin contributions scale like $S(S+1)/n_q$, where $S$ is the total spin and $n_q$ is the number of quark, in agreement with diagrammatic methods. Both potentials yield also $S$-independent contributions which scale at most as O$(n_q)$.
description: 1 figure
Spectral monitoring of RX J1856.5-3754 with XMM-Newton. Analysis of EPIC-pn data
Creators: name: Sartore, N.
name: Tiengo, A.
name: Mereghetti, S.
name: De Luca, A.
name: Turolla, R.
name: Haberl, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Using a large set of XMM-Newton observations we searched for long term spectral and flux variability of the isolated neutron star RX J1856.5-3754 in the time interval from April 2002 to October 2011. This is the brightest and most extensively observed source of a small group of nearby, thermally emitting isolated neutron stars, of which at least one member (RX J0720.4-3125, Hohle et al., 2010) has shown long term variability. A detailed analysis of the data obtained with the EPIC-pn camera in the 0.15-1.2 keV energy range reveals small variations in the temperature derived with a single blackbody fit (of the order of 1% around kT^inf \sim 61 eV). Such variations are correlated with the position of the source on the detector and can be ascribed to an instrumental effect, most likely a spatial dependence of the channel to energy relation. For the sampled instrumental coordinates, we quantify this effect as variations of \sim 4% and \sim 15 eV in the gain slope and offset, respectively. Selecting only a homogeneous subset of observations, with the source imaged at the same detector position, we find no evidence for spectral or flux variations of RX J1856.5-3754 from March 2005 to present-day, with limits of Delta kT^inf < 0.5% and Delta f_X < 3% (0.15-1.2 keV), with 3sigma confidence. A slightly higher temperature (kT^inf \sim 61.5 eV, compared to kT^\inf \sim 61 eV) was instead measured in April 2002. If this difference is not of instrumental origin, it implies a rate of variation \sim -0.15 eV yr^-1 between April 2002 and March 2005. The high-statistics spectrum from the selected observations is best fitted with the sum of two blackbody models, with temperatures kT_h^inf = 62.4_{-0.4}^{+0.6} eV and kT_s^\inf = 38.9_{-2.9}^{+4.9} eV, which account for the flux seen in the optical band. No significant spectral features are detected, with upper limits of 6 eV on their equivalent width.
description: 11 pages, 6 figures. Accepted for publication in Astronomy and Astrophysics
WISE/NEOWISE observations of comet 103P/Hartley 2
Creators: name: Bauer, James M.
name: Walker, Russell G.
name: Mainzer, A. K.
name: Masiero, Joseph R.
name: Grav, Tommy
name: Dailey, John W.
name: McMillan, Robert S.
name: Lisse, Carey M.
name: Fernández, Yan R.
name: Meech, Karen J.
name: Pittichova, Jana
name: Blauvelt, Erin K.
name: Masci, Frank J.
name: A'Hearn, Michael F.
name: Cutri, Roc M.
name: Scotti, James V.
name: Tholen, David J.
name: DeBaun, Emily
name: Wilkins, Ashlee
name: Hand, Emma
name: Wright, Edward L.
name: Collaboration, the WISE
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We report results based on mid-infrared photometry of comet 103P/Hartley 2 taken during May 4-13, 2010 (when the comet was at a heliocentric distance of 2.3 AU, and an observer distance of 2.0 AU) by the Wide-field Infrared Survey Explorer (Wright et al. 2010). Photometry of the coma at 22 microns and data from the University of Hawaii 2.2-m telescope obtained on May 22, 2010 provide constraints on the dust particle size distribution, dlogn/dlogm, yielding power-law slope values of alpha = -0.97 +/- 0.10, steeper than that found for the inbound particle fluence during the Stardust encounter of comet 81P/Wild 2 (Green et al. 2004). The extracted nucleus signal at 12 microns is consistent with a body of average spherical radius of 0.6 +/- 0.2 km (one standard deviation), assuming a beaming parameter of 1.2. The 4.6 micron-band signal in excess of dust and nucleus reflected and thermal contributions may be attributed to carbon monoxide or carbon dioxide emission lines and provides limits and estimates of species production. Derived carbon dioxide coma production rates are 3.5(+/- 0.9) \times 10^24 molecules per second. Analyses of the trail signal present in the stacked image with an effective exposure time of 158.4 seconds yields optical-depth values near 9 x 10^-10 at a delta mean anomaly of 0.2 deg trailing the comet nucleus, in both 12 and 22 μm bands. A minimum chi-squared analysis of the dust trail position yields a beta-parameter value of 1.0 x10^-4, consistent with a derived mean trail-grain diameter of 1.1/ρ cm for grains of ρ g/cm^3 density. This leads to a total detected trail mass of at least 4 x 10^10 ρ kg.
description: Accepted to ApJ
Quantum discord and related measures of quantum correlations in XY chains
Creators: name: Canosa, N.
name: Ciliberti, L.
name: Rossignoli, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the quantum correlations of spin pairs in the ground state of finite XY chains in a transverse field, by evaluating the quantum discord as well as other related entropic measures of quantum correlations. A brief review of the latter, based on generalized entropic forms, is also included. It is shown that parity effects are of crucial importance for describing the behavior of these measures below the critical field. It is also shown that these measures reach full range in the immediate vicinity of the factorizing field, where they become independent of separation and coupling range. Analytical and numerical results for the quantum discord, the geometric discord and other measures in spin chains with nearest neighbor coupling and in fully connected spin arrays are also provided.
description: accepted in Int. J. Mod. Phys. B, special issue "Classical Vs Quantum correlations in composite systems" edited by L. Amico, S. Bose, V. Korepin and V. Vedral
Extrinsic Orbital Hall Effect: Orbital Skew Scattering and Crossover Between Diffusive and Intrinsic Orbital Transport
Creators: name: Veneri, Alessandro
name: Rappoport, Tatiana G.
name: Ferreira, Aires
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Despite the recent success of identifying experimental signatures of the orbital Hall effect (OHE), the research on the microscopic mechanisms behind this unique phenomenon is still in its infancy. Here, using a gapped 2D Dirac material as a model system of the OHE, we develop a microscopic theory of orbital transport which captures extrinsic disorder effects non-perturbatively. We show that it predicts several hitherto unknown effects, including (i) a strong dependence of the orbital Hall conductivity with the strength and symmetry of the impurity scattering potential, and (ii) a smooth crossover from intrinsic to extrinsic OHE as a function of the Fermi energy and impurity density. In contrast to previous (perturbative) studies, the OHE is found to exhibit bona fide diffusive behavior in the dilute impurity limit, which we trace back to the dominance of skew scattering-type processes. More generally, we argue that the newly unveiled orbital skew scattering mechanism governs the diffusive OHEs of a large class of 2D materials even when the crystal structure is inversion-symmetric. Our work unveils the crucial nature of non-perturbative vertex corrections for a complete description of orbital transport and confirms common short-range impurities as key enablers of the OHE.
description: Accepted version - 15 pages, 8 figures (includes supplementary material)
Quantized vortices in a rotating Bose-Einstein condensate with spatiotemporally modulated interaction
Creators: name: Wang, Deng-Shan
name: Song, Shu-Wei
name: Xiong, Bo
name: Liu, W. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We present theoretical analysis and numerical studies of the quantized vortices in a rotating Bose-Einstein condensate with spatiotemporally modulated interaction in harmonic and anharmonic potentials, respectively. The exact quantized vortex and giant vortex solutions are constructed explicitly by similarity transformation. Their stability behavior has been examined by numerical simulation, which shows that a new series of stable vortex states (defined by radial and angular quantum numbers) can be supported by the spatiotemporally modulated interaction in this system. We find that there exist stable quantized vortices with large topological charges in repulsive condensates with spatiotemporally modulated interaction. We also give an experimental protocol to observe these vortex states in future experiments.
The Adventure and the Prize
Creators: name: Sivers, Dennis
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This article presnts a condensed summary of separate, overlapping, presentations to the Workshop on Polarized Drell-Yan Physics (Santa Fe, NM, Oct. 31-Nov.1, 2010),the GHP 2011 Worshop (Anaheim, CA, Apr.21-27, 2011) and the Transversity 2011 Workshop (Veli-Lozinj, Croatia, Aug. 29-Sep. 2, 2011) during which the author advocated for a potential experimental program based at Fermilab utilizing high-intensity polarized proton beams of 120 GeV/c to 150 GeV/c. Some possible experiments in this program are introduced briefly. Interpretations for these potential experiments are presented in terms of a hypothetical solution to the "Quantum Yang Mills Theory" problem posed by Arthur Jaffe and Edward Witten as one of the seven Millenium Prize Problems in Mathematics issued by the Clay Mathematics Institute. These comparisons illustrate the close connection between transverse spin observables and the complex dynamics of confinement and chiral symmetry breaking found in quantum chormodynamics.
description: 20 pages with 8 color figures
A numerical algorithm for singular optimal LQ control systems
Creators: name: Delgado-Tellez, M.
name: Ibort, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 49J15, 34A09, 34K35, 65F10

description: A numerical algorithm to obtain the consistent conditions satisfied by singular arcs for singular linear-quadratic optimal control problems is presented. The algorithm is based on the presymplectic constraint algorithm (PCA) by Gotay-Nester \cite{Go78,Vo99} that allows to solve presymplectic hamiltonian systems and that provides a geometrical framework to the Dirac-Bergmann theory of constraints for singular Lagrangian systems \cite{Di49}. The numerical implementation of the algorithm is based on the singular value decomposition that, on each step allows to construct a semi-explicit system. Several examples and experiments are discussed, among them a family of arbitrary large singular LQ systems with index 3 and a family of examples of arbitrary large index, all of them exhibiting stable behaviour.
description: An old paper (2009) posted for archival purposes
Localized Langerhans cell histiocytosis masquerading as Brodie’s abscess in a 2-year-old child: a case report
Creators: name: Chang, Wei-Fang
name: Hsu, Yi-Chih
name: Wu, Yi-Der
name: Kuo, Chun-Lang
name: Huang, Guo-Shu
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2016
Subjects: knee pain
Langerhans cell histiocytosis
Brodie’s abscess
penumbra sign
differential diagnosis

description: Langerhans cell histiocytosis (LCH), formerly known as histiocytosis X, refers to a spectrum of diseases characterized by idiopathic proliferation of histiocytes that produce either focal (localized LCH) or systemic manifestations (Hand-Schüller-Christian disease and Letterer-Siwe disease). Localized LCH accounts for approximately 60-70 % of all LCH cases. Osseous involvement is the most common manifestation and typically involves the flat bones, along with lesions of the skull, pelvis, and ribs. Localized LCH in bone shows a wide spectrum of clinical manifestations and radiologic features that may mimic those of infections as well as benign and malignant tumors. The diagnostic imaging findings of localized LCH are also diverse and challenging. The penumbra sign is a common and characteristic magnetic resonance imaging (MRI) feature of Brodie's abscess, but is rarely seen in localized LCH. In this report, we describe a case of localized LCH misdiagnosed as Brodie's abscess in a 2-year-old child based on clinical symptoms, laboratory findings, and pre-diagnostic MRI findings (penumbra sign). Therefore, the penumbra sign is not sufficient to clearly establish the diagnosis of Brodie's abscess, and the differential diagnosis of localized LCH should be considered when a child with an osteolytic lesion presents with a penumbra sign.
description: EXCLI Journal; 15:Doc33; ISSN 1611-2156
QSAR study of HCV NS5B polymerase inhibitors using the genetic algorithm-multiple linear regression (GA-MLR)
Creators: name: Rafiei, Hamid
name: Khanzadeh, Marziyeh
name: Mozaffari, Shahla
name: Bostanifar, Mohammad Hassan
name: Avval, Zhila Mohajeri
name: Aalizadeh, Reza
name: Pourbasheer, Eslam
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2016
Subjects: QSAR
genetic algorithms
multiple linear regression
HCV

description: Quantitative structure-activity relationship (QSAR) study has been employed for predicting the inhibitory activities of the Hepatitis C virus (HCV) NS5B polymerase inhibitors. A data set consisted of 72 compounds was selected, and then different types of molecular descriptors were calculated. The whole data set was split into a training set (80 % of the dataset) and a test set (20 % of the dataset) using principle component analysis. The stepwise (SW) and the genetic algorithm (GA) techniques were used as variable selection tools. Multiple linear regression method was then used to linearly correlate the selected descriptors with inhibitory activities. Several validation technique including leave-one-out and leave-group-out cross-validation, Y-randomization method were used to evaluate the internal capability of the derived models. The external prediction ability of the derived models was further analyzed using modified r2, concordance correlation coefficient values and Golbraikh and Tropsha acceptable model criteria's. Based on the derived results (GA-MLR), some new insights toward molecular structural requirements for obtaining better inhibitory activity were obtained.
description: EXCLI Journal; 15:Doc38; ISSN 1611-2156
Benoît Brouns (†), Jean-Michel Matz, Laurent Vallière, avec la collaboration de Monique Bourin, Yves Esquieu, Michelle Fournié, Christian Freigang, Hélène Millet, Thierry Pécout, Vincent Tabbagh, Fasti Ecclesiae Gallicanae. Répertoire prosopographique des évêques, dignitaires et chanoines de France de 1200 à 1500. T. 19: Diocèse de Narbonne, Turnhout (Brepols), 2019
Creators: name: Große, Rolf
Publisher: name: Francia-Recensio
Year: 2020

description: Benoît Brouns (†), Jean-Michel Matz, Laurent Vallière, avec la collaboration de Monique Bourin, Yves Esquieu, Michelle Fournié, Christian Freigang, Hélène Millet, Thierry Pécout, Vincent Tabbagh, Fasti Ecclesiae Gallicanae. Répertoire prosopographique des évêques, dignitaires et chanoines de France de 1200 à 1500. T. 19: Diocèse de Narbonne, Turnhout (Brepols), 2019, X–503 p., ill. en n/b, ISBN 978-2-503-58602-1, 75,00 EUR.
description: Francia-Recensio, 2020/2
Hériman de Tournai, La restauration du monastère de Saint-Martin de Tournai. Traduction française de Paul Selvais, Turnhout (Brepols) 2019
Creators: name: Tock, Benoît-Michel
Publisher: name: Francia-Recensio
Year: 2020

description: Hériman de Tournai, La restauration du monastère de Saint-Martin de Tournai. Traduction française de Paul Selvais, Turnhout (Brepols) 2019, 199 p. (Corpus Christianorum in Translation, 32; Corpus christianorum. Continuatio mediaevalis, 236), ISBN 978-2-503-58059-3, EUR 40,00.
description: Francia-Recensio, 2020/2
Electronic energy level alignment at metal-molecule interfaces with a GW approach
Creators: name: Tamblyn, Isaac
name: Darancet, Pierre
name: Quek, Su Ying
name: Bonev, Stanimir A.
name: Neaton, Jeffrey B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using density functional theory and many-body perturbation theory within a GW approximation, we calculate the electronic structure of a metal-molecule interface consisting of benzene diamine (BDA) adsorbed on Au(111). Through direct comparison with photoemission data, we show that a conventional G$_0$W$_0$ approach can underestimate the energy of the adsorbed molecular resonance relative to the Au Fermi level by up to 0.8 eV. The source of this discrepancy is twofold: a 0.7 eV underestimate of the gas phase ionization energy (IE), and a 0.2 eV overestimate of the Au work function. Refinements to self-energy calculations within the GW framework that account for deviations in both the Au work function and BDA gas-phase IE can result in an interfacial electronic level alignment in quantitative agreement with experiment.
Surfactant and bronchial response
Creators: name: Koetzler, Rommy
Publisher: name: University of Calgary
Year: 2003

description: Bibliography: p. 122-132
description: A variety of clinical and experimental evidence indicates that surfactant may be important in the pathogenesis and treatment of asthma. The purpose of this study was to determine the effect of pulmonary surfactant and/or its components on precontracted rat bronchi. Left and right first generation bronchial tissues from male Sprague-Dawley rats were used in the studies done in vitro. Precontracted tissues were exposed to three kinds of surfactant: natural rat surfactant (NRS), bovine lipid extract surfactant (BLES), and Survanta. Surfactant was shown to relax rat bronchi in a concentration-dependent manner. The mechanism of surfactant-induced relaxation was determined. The surfactant relaxation response was inhibited when tissues were devoid of epithelium or when they were treated with indomethacin. N-co-nitro-L-arginine methyl ester (L-NAME) did not affect the surfactant-induced relaxation. Surfactant lipids, unsaturated phosphatidyicholine (uPC), dipalmitoylphosphatidylcholine (DPPC), and phosphatidyiglycerol (PG), and surfactant-specific protein A (SP-A) also showed a relaxant effect whereas non-surfactant lipids and proteins did not. We conclude that surfactant is an airway smooth muscle relaxant. The effect is specific and is dependent on the presence of epithelium and release of prostanoids, but is not dependent on the nitric oxide (NO) pathway.
Marguerite Figeac-Monthus, Éducation et culture matérielle en France et en Europe du XVIe siècle à nos jours, Paris (Honoré Champion) 2018
Creators: name: Priem, Karin
Publisher: name: Francia-Recensio
Year: 2020

description: Marguerite Figeac-Monthus, Éducation et culture matérielle en France et en Europe du XVIe siècle à nos jours, Paris (Honoré Champion) 2018, 450 p. (Didactiques des lettres et des cultures, 5), ISBN 978-2-7453-4860-9, EUR 55,00.
description: Francia-Recensio, 2020/2
Proton fraction in the inner neutron-star crust
Creators: name: Piekarewicz, J.
name: Sanchez, G. Toledo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Monte Carlo simulations of neutron-rich matter of relevance to the inner neutron-star crust are performed for a system of A=5,000 nucleons. To determine the proton fraction in the inner crust, numerical simulations are carried out for a variety of densities and proton fractions. We conclude---as others have before us using different techniques---that the proton fraction in the inner stellar crust is very small. Given that the purported "nuclear pasta" phase in stellar crusts develops as a consequence of the long-range Coulomb interaction among protons, we question whether pasta formation is possible in such proton-poor environments. To answer this question, we search for physical observables sensitive to the transition between spherical nuclei and exotic pasta structures. Of particular relevance is the static structure factor S(k)---an observable sensitive to density fluctuations. However, no dramatic behavior was observed in S(k). We regard the identification of physical observables sensitive to the existence---or lack-thereof---of a pasta phase in proton-poor environments as an open problem of critical importance.
description: 24 pages and 7 figures
Observation of anomalous classical-to-quantum transitions in many-body systems
Creators: name: You, Chenglong
name: Hong, Mingyuan
name: Mostafavi, Fatemeh
name: Ferdous, Jannatul
name: León-Montiel, Roberto de J.
name: Dawkins, Riley B.
name: Magaña-Loaiza, Omar S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The correspondence principle bridges the quantum and classical worlds by establishing a direct link between their dynamics. This well-accepted tenant of quantum physics has been explored in quantum systems wherein the number of particles is increased to macroscopic scales. However, theoretical investigations of nanoscale structures have revealed discrepancies when attempting to bridge classical and quantum physics. Here, we report on the experimental observation of anomalous classical-to-quantum transitions in open many-body optical systems. We demonstrate, for the first time, the lack of classical-to-quantum correspondence between a macroscopic optical system and its constituent quantum multiphoton subsystems. In contrast to common belief, we demonstrate that the coherence dynamics of many-body quantum subsystems with up to forty particles can indeed be opposite to that exhibited by the hosting macroscopic system. By employing complex-Gaussian statistics, we show that these effects are universal for open many-body systems. Consequently, our work can have important implications for other fields of physics ranging from condensed matter to nuclear physics.
Archäologische Fundchronik des Landes Sachsen-Anhalt 1998
Creators: name: Redaktion, Die
Publisher: name: Jahresschrift für mitteldeutsche Vorgeschichte
Year: 2020

description: Jahresschrift für mitteldeutsche Vorgeschichte, Bd. 82 (1999): Jahresschrift für Mitteldeutsche Vorgeschichte
Archaeology and Historical Ecology: the Archaeological Database of the LONGWOOD ERC Project
Creators: name: Kolář, Jan
name: Tkáč, Peter
name: Macek, Martin
name: Szabó, Péter
Publisher: name: Archäologisches Korrespondenzblatt
Year: 2020

description: Archäologisches Korrespondenzblatt, Bd. 46 Nr. 4 (2016): Archäologisches Korrespondenzblatt
Mergers of Unequal Mass Galaxies: Supermassive Black Hole Binary Evolution and Structure of Merger Remnants
Creators: name: Khan, Fazeel Mahmood
name: Preto, Miguel
name: Berczik, Peter
name: Berentzen, Ingo
name: Just, Andreas
name: Spurzem, Rainer
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Galaxy centers are residing places for Super Massive Black Holes (SMBHs). Galaxy mergers bring SMBHs close together to form gravitationally bound binary systems which, if able to coalesce in less than a Hubble time, would be one of the most promising sources of gravitational waves for the Laser Interferometer Space Antenna (LISA). In spherical galaxy models, SMBH binaries stall at a separation of approximately one parsec, leading to the "final parsec problem" (FPP). On the other hand, it has been shown that merger-induced triaxiality of the remnant in equal-mass mergers is capable of supporting a constant supply of stars on so-called centrophilic orbits that interact with the binary and thus avoid the FPP. In this paper, using a set of direct N-body simulations of mergers of initially spherically symmetric galaxies with different mass ratios, we show that the merger-induced triaxiality is able to drive unequal-mass SMBH binaries to coalescence. The binary hardening rates are high and depend only weakly on the mass ratios of SMBHs for a wide range of mass ratios q. The hardening rates are significantly higher for galaxies having steep cusps in comparison with those having shallow cups at centers. The evolution of the binary SMBH leads to relatively shallower inner slopes at the centers of the merger remnants. The stellar mass displaced by the SMBH binary on its way to coalescence is ~ 1-5 times the combined mass of binary SMBHs. The coalescence times for SMBH binary with mass ~ million solar masses are less than 1 Gyr and for those at the upper end of SMBH masses (~ billion solar masses) are 1-2 Gyr for less eccentric binaries whereas less than 1 Gyr for highly eccentric binaries. SMBH binaries are thus expected to be promising sources of gravitational waves at low and high redshifts.
description: Accepted for publication in the Astrophysical Journal (ApJ). 14 pages, 8 figures
Zur »sozialen Ungleichheit« in der mykenischen Palast- und Nachpalastzeit
Creators: name: Mühlenbruch, Tobias
Publisher: name: Archäologisches Korrespondenzblatt
Year: 2020

description: Archäologisches Korrespondenzblatt, Bd. 47 Nr. 2 (2017): Archäologisches Korrespondenzblatt
Ein tauschierter Militärgürtel des 5. Jahrhunderts aus der Pfalz
Creators: name: Riemer, Ellen
Publisher: name: Archäologisches Korrespondenzblatt
Year: 2020

description: Archäologisches Korrespondenzblatt, Bd. 47 Nr. 2 (2017): Archäologisches Korrespondenzblatt
Exact Chiral Spin Liquids and Mean-Field Perturbations of Gamma Matrix Models on the Ruby Lattice
Creators: name: Whitsitt, Seth
name: Chua, Victor
name: Fiete, Gregory A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically study an exactly solvable Gamma matrix generalization of the Kitaev spin model on the ruby lattice, which is a honeycomb lattice with "expanded" vertices and links. We find this model displays an exceptionally rich phase diagram that includes: (i) gapless phases with stable spin fermi surfaces, (ii) gapless phases with low-energy Dirac cones and quadratic band touching points, and (iii) gapped phases with finite Chern numbers possessing the values {\pm}4,{\pm}3,{\pm}2 and {\pm}1. The model is then generalized to include Ising-like interactions that break the exact solvability of the model in a controlled manner. When these terms are dominant, they lead to a trivial Ising ordered phase which is shown to be adiabatically connected to a large coupling limit of the exactly solvable phase. In the limit when these interactions are weak, we treat them within mean-field theory and present the resulting phase diagrams. We discuss the nature of the transitions between various phases. Our results highlight the richness of possible ground states in closely related magnetic systems.
description: 9 pages, 9 figures
Speckle Control with a remapped-pupil PIAA-coronagraph
Creators: name: Martinache, Frantz
name: Guyon, Olivier
name: Clergeon, Christophe
name: Blain, Celia
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The PIAA is a now well demonstrated high contrast technique that uses an intermediate remapping of the pupil for high contrast coronagraphy (apodization), before restoring it to recover classical imaging capabilities. This paper presents the first demonstration of complete speckle control loop with one such PIAA coronagraph. We show the presence of a complete set of remapping optics (the so-called PIAA and matching inverse PIAA) is transparent to the wavefront control algorithm. Simple focal plane based wavefront control algorithms can thus be employed, without the need to model remapping effects. Using the Subaru Coronagraphic Extreme AO (SCExAO) instrument built for the Subaru Telescope, we show that a complete PIAA-coronagraph is compatible with a simple implementation of a speckle nulling technique, and demonstrate the benefit of the PIAA for high contrast imaging at small angular separation.
description: 6 figures, submitted to PASP
Use of a Bent Crystal with a Decreasing Curvature to Increase the Efficiency of the Extraction and Collimation of a Beam in an Accelerator
Creators: name: Yazynin, I. A.
name: Maisheev, V. A.
name: Chesnokov, Yu. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: It has been shown that the use of a bent crystal with a variable curvature radius makes it possible to reduce the fraction of dechanneled particles by an order of magnitude. This effect enables the strong reduction of the particle density at the edge of a collimator or the partition of a septum upon the multiturn extraction of a beam from a ring accelerator. In particular, the beam extraction efficiency at the U-70 synchrotron and Large Hadron Collider can be increased to 95 and 99.65%, respectively.
description: 4 pages, 4 figures
Şeiva Sanie, Cetățuia geto-dacică de la Bărboşi (III)
Creators: name: Sanie, Silviu
Publisher: name: Arheologia Moldovei
Year: 2020

description: La Citadelle Géto-Dace De Bărboși (III) Dans ce segment de la monographies de la citadelle géto-dace du voisinage du Șiret et du Danube, les auteurs présentent quelques armes offensives et défensives, une partie des objets de parure et des découvertes monétaires. L’une des fibules illustrées est de type Glasinac (Pl. I/11 a, b) et elle a été entratnée au niveau dacc des vestiges des demeures antérieures à l'existence de la citadelle. On remarque la présence de certains types de fibules de large circulation dans l'espace galique, mais aussi dans l’Europe centrale et de l’ouest dès la fin du II siècle av.n.e. jusqu'au début du 11-ème siècle, comme, par exemple, la fibule type Nauheim, bien profilé de type norico-pannonique, etc. (Pl. I/4). Il faut mentionner, dans ce sens, les pièces de large circulation dans Latène el un anneau avec nodosités (Pl. 1/10). Avant de présenter les découvertes monétaires proprement dites, les auteurs décrivent une matrice pour l'avers d’une monnaie gètique (Fig. 1 a,b,c) et ensuite ils font des commentaires sur le celebre tresor monetaire, publié en 1919 (n. 26) compose de 517 monnaics (dès 217 av.n.c. jusqu’en 2—14 n.e.), interessanl aussi pour les 356 contremarques. Dans le cas des découvertes isolées, on présente, avec toutes les donées, 16, monnaies et l'on mentionne 7, des monnaies émisse à Histria, Tomis, Maroneia, déniers republicains et imperiaux, depuis Auguste á Tite. On pécise les situations où les conditions stratigraphiques ne permettent pas d'étetablir avec certitude l’appartenace aux niveaux dacique de certains monnaies, la citadelle dacique étant détruite bien des zones par le castellum romain. Les materiaux prèsentés sont à côté des imporls — qui vont former l’objet de la section suivante — des plus importants pour fonder la chronologie de la citadelle de Bărboși-Galați.
description: Arheologia Moldovei, Bd. 14 (1991): Arheologia Moldovei
Measurement of the nuclear multiplicity ratio for $K^0_s$ hadronization at CLAS
Creators: name: Daniel, A.
name: Hicks, K.
name: Brooks, W. K.
name: Hakobyan, H.
name: Collaboration, CLAS
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The influence of cold nuclear matter on lepto-production of hadrons in semi-inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the $K_s^0$ multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy $z$ transferred to the $K_s^0$ and the transverse momentum squared $p_{T}^2$ of the $K_s^0$. We find that the multiplicity ratios for $K^0_s$ are reduced in the nuclear medium at high $z$ and low $p_{T}^2$, with a trend for the $K^0_s$ transverse momentum to be broadened in the nucleus for large $p_{T}^2$.
description: Submitted to Phys. Lett. B
Tezaurul de denari romani imperiali de la Gherăieştii Noi, jud. Neamţ
Creators: name: Mihăilescu-Bîrliba, Virgil
Publisher: name: Arheologia Moldovei
Year: 2020

description: The Hoard of Roman Imperial Denarii from Gherăieștii Noi, Neamț county In 1977, two hundred seventy-one silver coins, and the vessel in which the hoard had been buried, were discovercd west of the village of Gherăieștii Noi (Gherăicști commune, Neamț county). The wheel-worked vessel is a small mug made from a fine grey paste and shows analogies with the Daco-Carpian pollery (Fig. 1/a and footnotes 4 — 6).The coins are dated between A.D. 63 — 68 and 184 — 185 (Nero-Commodus). Most of them were issued by Trajan and Marcus Aurelius (67.89%) (Table 1). The nucleus of the Gherăicști hoard is similar to the treasures frorn Costești and Rediu (Moldavia), Bletchley, Vienna, Chasanfakla, Matiusi, Kriačikovka, Podlesnovka and Černitza (footnotes 8 — 13).The hoard consists of 270 denarii and of a „barbarian” denarius (No. 271 ; Fig. 1/c). The „barbarian” denarius is copied after the 2nd-c. denarii and presumably comes frorn the towns in the north of the Black Sea coast (footnote 23). The total weight of the coins after cleaning is of 865.20 g, the average weight being 3.193 g. The emissions of Antoninus Pius, Marcus Aurelius and Commodus have the greatest weight; the smallest weight have the Nero, Vitellius, Vespasianus and Titus coins (Table 2). We also observed the absence of some coin fragments, due — perhaps — to some official attempls at diminishing the weight of the denarii (footnote 16).The numismatic examination shows that the accumulation ends about A.D. 184 — 185. The origin of the coins and the date when they were buried cannot be specified. The hoard belonged to the Carpo-Dacians (see the vessel) and was acumulaled in a period of money devaluation, being buried after Septimius Scverus’ reform, perhaps in the first decades of the 3rd centnry A.D. (footnotes 24 and 39).
description: Arheologia Moldovei, Bd. 14 (1991): Arheologia Moldovei
Performance Evaluation of Realistic Vanet Using Traffic Light Scenario
Creators: name: Nidhi
name: Lobiyal, D. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Vehicular Ad-hoc Networks (VANETs) is attracting considerable attention from the research community and the automotive industry to improve the services of Intelligent Transportation System (ITS). As today's transportation system faces serious challenges in terms of road safety, efficiency, and environmental friendliness, the idea of so called "ITS" has emerged. Due to the expensive cost of deployment and complexity of implementing such a system in real world, research in VANET relies on simulation. This paper attempts to evaluate the performance of VANET in a realistic environment. The paper contributes by generating a real world road Map of JNU using existing Google Earth and GIS tools. Traffic data from a limited region of road Map is collected to capture the realistic mobility. In this work, the entire region has been divided into various smaller routes. The realistic mobility model used here considers the driver's route choice at the run time. It also studies the clustering effect caused by traffic lights used at the intersection to regulate traffic movement at different directions. Finally, the performance of the VANET is evaluated in terms of average delivery ratio, packet loss, and router drop as statistical measures for driver route choice with traffic light scenario. This experiment has provided insight into the performance of vehicular traffic communication for a small realistic scenario.
Tipuri rare de cruciuliţe medievale
Creators: name: Spinei, Victor
name: Maxim-Alaiba, Ruxandra
Publisher: name: Arheologia Moldovei
Year: 2020

description: Rare types of small medieval crosses Includes a summary in French
description: Arheologia Moldovei, Bd. 14 (1991): Arheologia Moldovei