cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Mönnich, Conrad Willem: Bürger, Ketzer, Außenseiter
Creators: name: Fischinger, Dietrich
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 34 Nr. 4 (1985): Ökumenische Rundschau, Band 34, Heft 4
Installation of in-situ Raman measurements at the M-Branch
Creators: name: Dedera, S.
name: Glasmacher, U. A.
name: Bruchard, M.
name: Bender, M.
name: Severin, D.
name: Trautmann, C.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Universality in microdroplet nucleation during solvent exchange in Hele-Shaw like channels
Creators: name: Li, Yanshen
name: Chong, Kai Leong
name: Bazyar, Hanieh
name: Lammertink, Rob G. H.
name: Lohse, Detlef
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Micro and nanodroplets have many important applications such as in drug delivery, liquid-liquid extraction, nanomaterial synthesis and cosmetics. A commonly used method to generate a large number of micro or nanodroplets in one simple step is solvent exchange (also called nanoprecipitation), in which a good solvent of the droplet phase is displaced by a poor one, generating an oversaturation pulse that leads to droplet nucleation. Despite its crucial importance, the droplet growth resulting from the oversaturation pulse in this ternary system is still poorly understood. We experimentally and theoretically study this growth in Hele-Shaw like channels by measuring the total volume of the oil droplets that nucleates out of it. In order to prevent the oversaturated oil from exiting the channel, we decorated some of the channels with a porous region in the middle. Solvent exchange is performed with various solution compositions, flow rates and channel geometries, and the measured droplets volume is found to increase with the Péclet number $Pe$ with an approximate effective power law $V\propto Pe^{0.50}$. A theoretical model is developed to account for this finding. With this model we can indeed explain the $V\propto Pe^{1/2}$ scaling, including the prefactor, which can collapse all data of the "porous" channels onto one universal curve, irrespective of channel geometry and composition of the mixtures. Our work provides a macroscopic approach to this bottom-up method of droplet generation and may guide further studies on oversaturation and nucleation in ternary systems.
description: Published in Journal of Fluid Mechanics. 16 pages, 6 figures
On the Crystallization of Terbium Aluminium Garnet
Creators: name: Ganschow, S.
name: Klimm, D.
name: Reiche, P.
name: Uecker, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Attempts to grow terbium aluminium garnet (Tb3Al5O12, TAG) by the Czochralski method lead to crystals of millimeter scale. Larger crystals could not be obtained. DTA measurements within the binary system showed that TAG melts incongruently at 1840 deg. C. The perovskite (TbAlO3, TAP) with a congruent melting point of 1930 deg. C is the most stable phase in this system. The region for primary crystallization of TAP covers the chemical composition of TAG and suppresses the primary crystallization of the terbium aluminium garnet.
description: 6 pages, 2 figures
Online Raman on M-branch : First results
Creators: name: Dedera, S.
name: Glasmacher, U. A.
name: Burchard, M.
name: Trautmann, C.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
CATFace: Cross-Attribute-Guided Transformer with Self-Attention Distillation for Low-Quality Face Recognition
Creators: name: Talemi, Niloufar Alipour
name: Kashiani, Hossein
name: Nasrabadi, Nasser M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Although face recognition (FR) has achieved great success in recent years, it is still challenging to accurately recognize faces in low-quality images due to the obscured facial details. Nevertheless, it is often feasible to make predictions about specific soft biometric (SB) attributes, such as gender, and baldness even in dealing with low-quality images. In this paper, we propose a novel multi-branch neural network that leverages SB attribute information to boost the performance of FR. To this end, we propose a cross-attribute-guided transformer fusion (CATF) module that effectively captures the long-range dependencies and relationships between FR and SB feature representations. The synergy created by the reciprocal flow of information in the dual cross-attention operations of the proposed CATF module enhances the performance of FR. Furthermore, we introduce a novel self-attention distillation framework that effectively highlights crucial facial regions, such as landmarks by aligning low-quality images with those of their high-quality counterparts in the feature space. The proposed self-attention distillation regularizes our network to learn a unified quality-invariant feature representation in unconstrained environments. We conduct extensive experiments on various FR benchmarks varying in quality. Experimental results demonstrate the superiority of our FR method compared to state-of-the-art FR studies.
description: Accepted in IEEE Transactions on Biometrics, Behavior, and Identity Science (T-BIOM), 2024
Bright galaxy sample in the Kilo-Degree Survey Data Release 4: selection, photometric redshifts, and physical properties
Creators: name: Bilicki, M.
name: Dvornik, A.
name: Hoekstra, H.
name: Wright, A. H.
name: Chisari, N. E.
name: Vakili, M.
name: Asgari, M.
name: Giblin, B.
name: Heymans, C.
name: Hildebrandt, H.
name: Holwerda, B. W.
name: Hopkins, A.
name: Johnston, H.
name: Kannawadi, A.
name: Kuijken, K.
name: Nakoneczny, S. J.
name: Shan, H. Y.
name: Sonnenfeld, A.
name: Valentijn, E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present a bright galaxy sample with accurate and precise photometric redshifts (photo-zs), selected using $ugriZYJHK_\mathrm{s}$ photometry from the Kilo-Degree Survey (KiDS) Data Release 4 (DR4). The highly pure and complete dataset is flux-limited at $r<20$ mag, covers $\sim1000$ deg$^2$, and contains about 1 million galaxies after artifact masking. We exploit the overlap with Galaxy And Mass Assembly (GAMA) spectroscopy as calibration to determine photo-zs with the supervised machine learning neural network algorithm implemented in the ANNz2 software. The photo-zs have mean error of $|\langle δz \rangle| \sim 5 \times 10^{-4}$ and low scatter (scaled mean absolute deviation of $\sim 0.018(1+z)$), both practically independent of the $r$-band magnitude and photo-z at $0.05 < z_\mathrm{phot} < 0.5$. Combined with the 9-band photometry, these allow us to estimate robust absolute magnitudes and stellar masses for the full sample. As a demonstration of the usefulness of these data we split the dataset into red and blue galaxies, use them as lenses and measure the weak gravitational lensing signal around them for five stellar mass bins. We fit a halo model to these high-precision measurements to constrain the stellar-mass--halo-mass relations for blue and red galaxies. We find that for high stellar mass ($M_\star>5\times 10^{11} M_\odot$), the red galaxies occupy dark matter halos that are much more massive than those occupied by blue galaxies with the same stellar mass. The data presented here are publicly released via the KiDS webpage at http://kids.strw.leidenuniv.nl/DR4/brightsample.php.
description: Matches the published version. Data available at http://kids.strw.leidenuniv.nl/DR4/brightsample.php
THE ROLE OF HUMAN CAPITAL IN DRIVING ORGANIZATIONAL SUCCESS
Creators: name: Abdugafurova, Dilbar
Publisher: name: Zenodo
Year: 2024
Subjects: Human Capital, Organizational Success, Employee Engagement, Leadership, Transformational Leadership, Talent Management, Workforce Development, Employee Retention, Organizational Culture, Competitive Advantage.

description: Abstract: As the business environment changing rapidly, the success of any organization is largely determined by the strength and quality of its human capital. It encompasses the combined skills, knowledge, experience, and competencies of an organization’s workforce.

While technology and financial capital hold significance, it is individuals behind the operations - employees, managers, and leaders - who have a vital role in driving innovation, productivity, and long-term success. This article delves into the significance, of human capital in shaping organizational outcomes, and presents approaches for optimizing its potential.
An introduction to kinks in $φ^4$-theory
Creators: name: Lizunova, Mariya
name: van Wezel, Jasper
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: As a low-energy effective model emerging in disparate fields throughout all of physics, the ubiquitous $φ^4$-theory is one of the central models of modern theoretical physics. Its topological defects, or kinks, describe stable, particle-like excitations that play a central role in processes ranging from cosmology to particle physics and condensed matter theory. In these lecture notes, we introduce the description of kinks in $φ^4$-theory and the various physical processes that govern their dynamics. The notes are aimed at advanced undergraduate students, and emphasis is placed on stimulating qualitative insight into the rich phenomenology encountered in kink dynamics. The appendices contain more detailed derivations, and allow enquiring students to also obtain a quantitative understanding. Topics covered include the topological classification of stable solutions, kink collisions, the formation of bions, resonant scattering of kinks, and kink-impurity interactions.
description: 27 pages, submitted to SciPost Physics Lecture Notes; small updates
Generic Short-Time Propagation of Sharp-Boundaries Wave Packets
Creators: name: Granot, Er'el
name: Marchewka, Avi
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A general solution to the "shutter" problem is presented. The propagation of an arbitrary initially bounded wavefunction is investigated, and the general solution for any such function is formulated. It is shown that the exact solution can be written as an expression that depends only on the values of the function (and its derivatives) at the boundaries. In particular, it is shown that at short times ($t\ll2mx^2/\hbar$, where $x$ is the distance to the boundaries) the wavefunction propagation depends only on the wavefunction's values (or its derivatives) at the boundaries of the region. Finally, we generalize these findings to a non-singular wavefunction (i.e., for wavepackets with finite-width boundaries) and suggest an experimental verification.
description: 8 pages, 5 figures
On Upper Bound Conjecture on Wavefront Set and Generalized Shahidi Conjecture
Creators: name: Lo, Chi-Heng
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 490499
subject: Pure mathematics not elsewhere classified

description: In the first part of the thesis, we study the upper bound of wavefront sets of irreducible admissible representations of connected reductive groups defined over non-Archimedean local fields of characteristic zero. We formulate a new conjecture on the upper bound and show that it can be reduced to that of anti-discrete series representations, namely, those whose Aubert-Zelevinsky duals are discrete series. Then, under certain assumptions, we show that this conjecture is equivalent to the Jiang conjecture on the upper bound of wavefront sets of representations in local Arthur packets and also equivalent to an analogous conjecture on the upper bound of wavefront sets of representations in ABV packets.In the second part of the thesis, we propose the generalized Shahidi conjecture: for each Aubert-Zelevinsky dual of an $L$-packet, there exists at least one member whose wavefront set achieves the conjectural upper bound. This generalizes the well-known Shahidi conjecture that tempered $L$-packet has a generic member. For classical groups, we prove that assuming the upper bound conjecture on wavefront set, the generalized Shahidi conjecture for general $L$-parameter can be reduced to that of almost discrete $L$-parameters.
Evolution of Binary Supermassive Black Holes via Chain Regularization
Creators: name: Szell, Andras
name: Merritt, David
name: Mikkola, Seppo
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A chain regularization method is combined with special purpose computer hardware to study the evolution of massive black hole binaries at the centers of galaxies. Preliminary results with up to N=260,000 particles are presented. The decay rate of the binary is shown to decrease with increasing N, as expected on the basis of theoretical arguments. The eccentricity of the binary remains small.
description: 8 pages. To appear in "Nonlinear Dynamics in Astronomy and Physics, A Workshop Dedicated to the Memory of Professor Henry E. Kandrup", ed. J. R. Buchler, S. T. Gottesman and M. E. Mahon
Variable resistance at the boundary between semimetal and excitonic insulator
Creators: name: Rontani, Massimo
name: Sham, L. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We solve the two-band model for the transport across a junction between a semimetal and an excitonic insulator. We analyze the current in terms of two competing terms associated with neutral excitons and charged carriers, respectively. We find a high value for the interface resistance, extremely sensitive to the junction transparency. We explore favorable systems for experimental confirmation.
description: Latex Elsevier Style, 14 pages, 3 postscript figures. Special Issue of Solid State Communications on Spontaneous Coherence in Excitonic Systems
Научно-методическая конференция "Пушкин и современность", посвященная 30-летнему юбилею ТЛ им. А. С. Пушкина и Республиканскому пушкинскому форуму, Бельцы, 21 октября 2016 г. : (Сборник статей)
Creators: name: Шершун, Ираида
name: Урсу, Елена
name: Сирота, Елена
name: Сузанская, Татьяна
name: Бражук, Владимир
name: Балан, Олга
Publisher: name: Zenodo
Year: 2019
Subjects: conferinţe ştiinţifice
cercetare ştiinţifică
USARB

description: Сборник статей включает работы преподавателей БГУ "Алеку Руссо" и Теоретического Лицея А. С. Пушкина представленных на научно-методическом конференции "Пушкин и современность", посвященная 30-летнему юбилею ТЛ им. А. С. Пушкина и Республиканскому Пушкинскому форуму.
description: Научно-методическая конференция "Пушкин и современность", посвященная 30-летнему юбилею ТЛ им. А. С. Пушкина и Республиканскому пушкинскому форуму, Бельцы, 21 октября 2016 г. : (Сборник статей) / редакционная коллегия: Ираида Шершун, Елена Урсу, Елена Сирота, Татьяна Сузанская. - Бельцы : [Б.и.], 2016. - 47 с. ; табл.. - Надзаг.: БГУ им. "Алеку Руссо", Фонд "Рус. мир", Теорет. лицей им. "А. С. Пушкина", мун. Бэлць. - Библиогр. в конце глав. - ISBN 978-9975-50-180-4.
Multi-Epoch Optical Spectroscopy Variability of the Changing-Look AGN Mrk 883
Creators: name: Benítez, Erika
name: Negrete, Castalia Alenka
name: Ibarra-Medel, Héctor
name: Cruz-González, Irene
name: Rodríguez-Espinosa, José Miguel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: In this work, we present multi-epoch optical spectra of the Seyfert 1.9 galaxy Mrk 883. Data were obtained with the Gran Telescopio Canarias and the \emph{MEGARA} Integral Field Unit mode, archival data from the SDSS-IV MaNGA Survey and the SDSS-I Legacy Survey, and~new spectroscopic observations obtained at San Pedro Mártir Observatory. We report the appearance of the broad component of Hb, emission line, showing a maximum FWHM $\sim$ 5927 $\pm$\, 481\,km\,s$^{-1}$ in the MaNGA spectra, finding evidence for a change from Seyfert 1.9 (23 June 2003) to Seyfert 1.8 (18 May 2018). The~observed changing-look variation from Sy1.9 to Sy1.8 has a timescale $Δ$t\,$\sim$15~y. In~addition, we observe profile and flux broad emission line variability from 2018 to 2023, and a wind component in [OIII]5007~Å, with~a maximum FWHM = 1758 $\pm$ 178 km\,s$^{-1}$, detected on 15 April 2023. In all epochs, variability of the broad lines was found to be disconnected from the optical continuum emission, which shows little or no variations. These results suggest that an ionized-driven wind in the polar direction could be a possible scenario to explain the observed changing-look variations.
description: Accepted for publication at Universe MDPI.14 pages, 6 figures
Scaled boundary cubature scheme for numerical integration over planar regions with affine and curved boundaries
Creators: name: Chin, Eric B.
name: Sukumar, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper introduces the scaled boundary cubature (SBC) scheme for accurate and efficient integration of functions over polygons and two-dimensional regions bounded by parametric curves. Over two-dimensional domains, the SBC method reduces integration over a region bounded by $m$ curves to integration over $m$ regions (referred to as curved triangular regions), where each region is bounded by two line segments and a curve. With proper (counterclockwise) orientation of the boundary curves, the scheme is applicable to convex and nonconvex domains. Additionally, for star-convex domains, a tensor-product cubature rule with positive weights and integration points in the interior of the domain is obtained. If the integrand is homogeneous, we show that this new method reduces to the homogeneous numerical integration scheme; however, the SBC scheme is more versatile since it is equally applicable to both homogeneous and non-homogeneous functions. This paper also introduces several methods for smoothing integrands with point singularities and near-singularities. When these methods are used, highly efficient integration of weakly singular functions is realized. The SBC method is applied to a number of benchmark problems, which reveal its broad applicability and superior performance (in terms of time to generate a rule and accuracy per cubature point) when compared to existing methods for integration.
description: 41 pages, 24 figures
Non-Hamiltonian Commutators in Quantum Mechanics
Creators: name: Sergi, Alessandro
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The symplectic structure of quantum commutators is first unveiled and then exploited to introduce generalized non-Hamiltonian brackets in quantum mechanics. It is easily recognized that quantum-classical systems are described by a particular realization of such a bracket. In light of previous work, this introduces a unified approach to classical and quantum-classical non-Hamiltonian dynamics. In order to illustrate the use of non-Hamiltonian commutators, it is shown how to define thermodynamic constraints in quantum-classical systems. In particular, quantum-classical Nosé-Hoover equations of motion and the associated stationary density matrix are derived. The non-Hamiltonian commutators for both Nosé-Hoover chains and Nosé-Andersen (constant-pressure constant temperature) dynamics are also given. Perspectives of the formalism are discussed.
description: Submitted to Phys. Rev. E on August 8 2005
The dependence of subhalo abundance matching on galaxy photometry and selection criteria
Creators: name: Stiskalek, Richard
name: Desmond, Harry
name: Holvey, Thomas
name: Jones, Michael G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Subhalo abundance matching (SHAM) is a popular technique for assigning galaxy mass or luminosity to haloes produced in N-body simulations. The method works by matching the cumulative number functions of the galaxy and halo properties, and is therefore sensitive both to the precise definitions of those properties and to the selection criteria used to define the samples. Further dependence follows when SHAM parameters are calibrated with galaxy clustering, which is known to depend strongly on the manner in which galaxies are selected. In this paper we introduce a new parametrisation for SHAM and derive the best-fit SHAM parameters as a function of various properties of the selection of the galaxy sample and of the photometric definition, including Sérsic vs Petrosian magnitudes, stellar masses vs r-band magnitudes and optical (SDSS) vs HI (ALFALFA) selection. In each case we calculate the models' goodness-of-fit to measurements of the projected two-point galaxy correlation function. In the optically-selected samples we find strong evidence that the scatter in the galaxy-halo connection increases towards the faint end, and that AM performs better with luminosity than stellar mass. The SHAM parameters of optically- and HI-selected galaxies are mutually exclusive, with the latter suggesting the importance of properties beyond halo mass. We provide best-fit parameters for the SHAM galaxy-halo connection as a function of each of our input choices, extending the domain of validity of the model while reducing potential systematic error in its use.
description: 19 pages and 15 figures. Matches the journal version
EVALUATION OF THE EFFECTS OF SELF-MEDICATION AMONG PROFESSIONAL HEALTH WORKERS IN ABUJA
Creators: name: Ibrahim Shamsiya
Publisher: name: Zenodo
Year: 2024

description: This study evaluates the effect of self-medication among professional health workers in Abuja, Nigeria. It explores the prevalence, patterns, and associated factors of self-medication practices within this population. The findings aim to inform policy recommendations and educational programs to mitigate the risks associated with self-medication.
The impact of spectral line wing cut-off: Recommended standard method with application to MAESTRO opacity database
Creators: name: Ehsan
name: Gharib-Nezhad
name: Batalha, Natasha E.
name: Chubb, Katy
name: Freedman, Richard
name: Gordon, Iouli E.
name: Gamache, Robert R.
name: Hargreaves, Robert J.
name: Lewis, Nikole K.
name: Tennyson, Jonathan
name: Yurchenko, Sergei N.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: When computing cross-sections from a line list, the result depends not only on the line strength, but also the line shape, pressure-broadening parameters, and line wing cut-off (i.e., the maximum distance calculated from each line centre). Pressure-broadening can be described using the Lorentz lineshape, but it is known to not represent the true absorption in the far wings. Both theory and experiment have shown that far from the line centre, non-Lorentzian behaviour controls the shape of the wings and the Lorentz lineshape fails to accurately characterize the absorption, leading to an underestimation or overestimation of the opacity continuum depending on the molecular species involved. The line wing cut-off is an often overlooked parameter when calculating absorption cross sections, but can have a significant effect on the appearance of the spectrum since it dictates the extent of the line wing that contributes to the calculation either side of every line centre. Therefore, when used to analyse exoplanet and brown dwarf spectra, an inaccurate choice for the line wing cut-off can result in errors in the opacity continuum, which propagate into the modeled transit spectra, and ultimately impact/bias the interpretation of observational spectra, and the derived composition and thermal structure. Here, we examine the different methods commonly utilized to calculate the wing cut-off and propose a standard practice procedure (i.e., absolute value of 25~cm$^{-1}$ for $P\leqslant$~200~bar and 100~cm$^{-1}$ for $P >$ ~200~bar) to generate molecular opacities which will be used by the open-access {\tt MAESTRO} (Molecules and Atoms in Exoplanet Science: Tools and Resources for Opacities) database. The pressing need for new measurements and theoretical studies of the far-wings is highlighted.
description: 13 pages, 6 figures
Tales from the edge : perspectives on "at-risk" teaching
Creators: name: Fukui, Leanne Kazumi
Publisher: name: University of British Columbia
Year: 2009

description: This qualitative study provides entrance into the everyday experiences of a team of teachers working in an alternate program. The teachers' personal narratives of the daily, intimate and complex interactions between teachers and students are presented and probed for possible interpretations. Their anecdotes reveal that these teachers do not experience students' risk, in the usual negative sense of the word, but instead as hope for that which is not yet, and for that which might be possible. This hope is shown, for example, through teacher care and commitment to individual students, as well as through high teacher expectations and clearly articulated standards which the students must work hard to achieve. This study suggests that understanding what it is to teach well in a so-called "at-risk" setting is to increase our understanding of the greater question of what it is to teach.
Spin-orbit interaction induces charge beatings in a lightwave-STM single molecule junction
Creators: name: Frankerl, Moritz
name: Donarini, Andrea
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent lightwave-STM experiments have shown space and time resolution of single molecule vibrations directly on their intrinsic length and time scales. We address here theoretically the electronic dynamics of a copper-phthalocynanine in a lightwave-STM, explored within a pump-probe cycle scheme. The spin-orbit interaction in the metallic center induces beatings of the electric charge flowing through the molecule as a function of the delay time between the pump and the probe pulses. Interference between the quasi-degenerate anionic states of the molecule and the intertwined dynamics of the associated spin and pseudospin degrees of freedom are the key aspects of such phenomenon. We study the dynamics directly in the time domain within a generalized master equation approach.
Interfacial Instability of Charged End-Group Polymer Brushes
Creators: name: Tsori, Yoav
name: Andelman, David
name: Joanny, Jean-François
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We consider a polymer brush grafted to a surface (acting as an electrode) and bearing a charged group at its free end. Using a second distant electrode, the brush is subject to a constant electric field. Based on a coarse-grained continuum model, we calculate the average brush height and find that the brush can stretch or compress depending on the applied field and charge end-group. We further look at an undulation mode of the flat polymer brush and find that the electrostatic energy scales linearly with the undulation wavenumber, $q$. Competition with surface tension, scaling as $q^2$, tends to stabilize a lateral $q$-mode of the polymer brush with a well-defined wavelength. This wavelength depends on the brush height, surface separation, and several system parameters.
description: 6 pages, 3 figures
May oxygen depletion explain the FLASH effect? A chemical track structure analysis
Creators: name: Boscolo, Daria
name: Scifoni, Emanuele
name: Durante, Marco
name: Krämer, Michael
name: Fuss, Martina C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Background and purpose: Recent observations in animal models show that ultra-high dose rate ("FLASH") radiation treatment significantly reduces normal tissue toxicity maintaining an equivalent tumor control. The dependence of this "FLASH" effect on target oxygenation has led to the assumption that oxygen "depletion" could be its major driving force. Materials and Methods: In a bottom-up approach starting from the chemical track evolution of 1 MeV electrons in oxygenated water simulated with the TRAX-CHEM Monte Carlo code, we determine the oxygen consumption and radiolytic reactive oxygen species production following a short radiation pulse. Based on these values, the effective dose weighted by oxygen enhancement ratio (OER) or the in vitro cell survival under dynamic oxygen pressure is calculated and compared to that of conventional exposures, at constant OER. Results: We find an excellent agreement of our Monte Carlo predictions with the experimental value for radiolytic oxygen removal from oxygenated water. However, the application of the present model to published radiobiological experiment conditions shows that oxygen depletion can only have a negligible impact on radiosensitivity through oxygen enhancement, especially at typical experimental oxygenations where a FLASH effect has been observed. Conclusion: We show that the magnitude and dependence of the "oxygen depletion" hypothesis are not consistent with the observed biological effects of FLASH irradiation. While oxygenation plays an undoubted role in mediating the FLASH effect, we conclude that state-of-the-art radiation chemistry models do not support oxygen depletion and radiation-induced transient hypoxia as the main mechanism.
description: 21 pages, 8 figures
Deficiency of large equivalent width Lyman-alpha emission in luminous Lyman break galaxies at z~5-6?
Creators: name: Ando, Masataka
name: Ohta, Kouji
name: Iwata, Ikuru
name: Akiyama, Masayuki
name: Aoki, Kentaro
name: Tamura, Naoyuki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a deficiency of luminous Lyman break galaxies (LBGs) with a large rest-frame equivalent width (EW_rest) of Lyman-alpha emission at z~5-6. Combining our spectroscopic sample of LBGs at z~5 and those from the literature, we found that luminous LBGs at z~5-6 generally show weak Lyman-alpha emissions, while faint LBGs show a wide range of Lyman-alpha EW_rest and tend to have strong (EW_rest >20A) Lyman-alpha emissions; i.e., there is a deficiency of strong Lyman-alpha emission in luminous LBGs. There seems to be a threshold UV luminosity for the deficiency; it is M_1400 = -21.5 \~ -21.0 mag, which is close to or somewhat brighter than the M* of the UV luminosity function at z~5 and 6. Since the large EW_rest of Lyman-alpha emission can be seen among the faint LBGs, the fraction of Lyman-alpha emitters in LBGs may change rather abruptly with the UV luminosity. If the weakness of Lyman-alpha emission is due to dust absorption, the deficiency suggests that luminous LBGs at z=5-6 tend to be in dusty and more chemically evolved environments and started star formation earlier than faint ones, though other causes cannot be ruled out.
description: 12 pages, 1 figure, ApJ(letters) in press: revised to correct references and some typographical errors
Ordered Dissipative Structures in Exciton Systems in Semiconductor Quantum Wells
Creators: name: Chernyuk, Andrey A.
name: Sugakov, Volodymyr I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A phenomenological theory of exciton condensation in conditions of inhomogeneous excitation is proposed. The theory is applied to the study of the development of an exciton luminescence ring and the ring fragmentation at macroscopical distances from the central excitation spot in coupled quantum wells. The transition between the fragmented and the continuous ring is considered. With assumption of a defect in the structure, a possibility of a localized island of the condensed phase in a fixed position is shown. Exciton density distribution is also analyzed in the case of two spatially separated spots of the laser excitation.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
The effects of ESL : a case study of mainstream teachers’ perceptions of ESL students and the ESL program at a junior high school
Creators: name: Garnett, Bruce William
Publisher: name: University of British Columbia
Year: 2009

description: This research documents one junior high school's mainstream teachers' perceptions of the ESL students in their classrooms and the ESL program that services these students. Using qualitative methods appropriate for descriptive case study research, the open-ended questionnaire and the semi-structured interview (Johnson, 1992), the study sought to discover the emic perspective of mainstream teachers who taught ESL students on a daily basis. It was found that a variety of "effects" surrounded the ESL phenomenon at the research site both at the classroom and programmatic levels. At the classroom level the diverse cultural backgrounds and attitudes of ESL students were seen to have both beneficial and challenging effects on mainstream teachers and classrooms. Conversely, mainstream classrooms had effects on ESL students which were manifested in both desirable and undesirable ways. At the programmatic level, it was found that the model of ESL service delivery, wherein mainstream teachers were responsible for a substantial percentage of the ESL students' education, effected perceptions of particular responsibilities and needs among mainstream teachers, most notably more communication with ESL "experts". Respondents in the study also suggested ways ESL service could be delivered more effectively, given the cognitive and affective needs of ESL learners and the communication and ESL expertise needs of mainstream teachers. The study has a number of implications at both practical and theoretical levels. In practice, a number of useful functions for the ESL classroom have been suggested, specifically as a place for the fostering of self esteem, social networks, social and cultural skills and academic remediation. The ESL program is also implied to be in need of more funding, and a recommendation is further made for increased ESL training in pre-service teachers. The study concludes by reiterating a call for more ethnographic research describing different facets and perspectives of the ESL students' experiences in mainstream classrooms.
General Procedure of Gauge Fixings and Ghosts
Creators: name: Ohta, Nobuyoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the general procedure of gauge fixings and ghosts based on BRST invariance principle. It is shown that when this is applied to the higher-derivative gauge fixings, it gives the correct structure of gauge fixings and ghosts including "third ghost", previously derived at one-loop level. This procedure is solely based on the symmetry principle and is valid at full order.
description: 8 pages, v2: minor corrections
Raman measurements of heavy ion irradiated water-bearing  minerals
Creators: name: Schöppner, N.
name: Glasmacher, U. A.
name: Burchard, M.
name: Trautmann, C.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Book Review: Khwamsamphan thang kanmueang lao-vietnam kho.so. 1353-1975. (In Tlhai) [Laos-Vietnam Political Relationships, AD 1353-1975]
Creators: name: Sutida Tonlerd
Publisher: name: Center for Research on Plurality in the Mekong Region (CERP)
Year: 2019
Subjects: -

description: Journal of Mekong Societies, 15, 2, 103-108
The WFPC2 Archival Parallels Project
Creators: name: Wadadekar, Yogesh
name: Casertano, Stefano
name: Hook, Richard
name: Kızıltan, Bül ent
name: Koekemoer, Anton
name: Ferguson, Harry
name: Denchev, Doichin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We describe the methods and procedures developed to obtain a near-automatic combination of WFPC2 images obtained as part of the WFPC2 Archival Pure Parallels program. Several techniques have been developed or refined to ensure proper alignment, registration, and combination of overlapping images that can be obtained at different times and with different orientations. We quantify the success rate and the accuracy of the registration of images of different types, and we develop techniques suitable to equalize the sky background without unduly affecting extended emission. About 600 combined images of the 1,500 eventually planned have already been publicly released through the STScI Archive. The images released to date are especially suited to study star formation in the Magellanic Clouds, the stellar population in the halo of nearby galaxies, and the properties of star-forming galaxies at $ z \sim 3 $.
description: 12 pages, 7 figures, to appear in the PASP
Phonons in the beta-tin, Imma, and sh phases of Silicon from ab initio calculations
Creators: name: Gaal-Nagy, Katalin
name: Strauch, Dieter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a new interpretation of measured Raman frequencies of a high-pressure structure of Silicon which was assigned previously to the beta-tin phase. Our results show that the beta-tin->Imma->sh phase transitions have been already indicated in this experiment which was performed before the discovery of the Imma phase. We have calculated phonon-dispersion curves for the beta-tin, Imma, and sh phases of silicon using the plane-wave pseudopotential approach to the density-functional theory and the density-functional perturbation theory within the local density approximation. With the new assignment, the calculated phonon frequencies display an excellent agreement with the experimental data, and can be also used to determine precisely the transition pressure for the Imma->beta-tin phase transition. The sh->Imma transition is accompanied by soft modes.
description: 4 pages, 5 figures
The delay time distribution of Type-Ia supernovae in galaxy clusters: the impact of extended star-formation histories
Creators: name: Freundlich, Jonathan
name: Maoz, Dan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The delay time distribution (DTD) of Type-Ia supernovae (SNe Ia) is important for understanding chemical evolution, SN Ia progenitors, and SN Ia physics. Past estimates of the DTD in galaxy clusters have been deduced from SN Ia rates measured in cluster samples observed at various redshifts, corresponding to different time intervals after a presumed initial brief burst of star formation. A recent analysis of a cluster sample at $z=1.13-1.75$ confirmed indications from previous studies of lower-redshift clusters, that the DTD has a power-law form, ${\rm DTD}(t)=R_1 (t/{\rm Gyr})^α$, with amplitude $R_1$, at delay $t=1~\rm Gyr$, several times higher than measured in field-galaxy environments. This implied that SNe Ia are somehow produced in larger numbers by the stellar populations in clusters. This conclusion, however, could have been affected by the implicit assumption that the stars were formed in a single brief starburst at high $z$. Here, we re-derive the DTD from the cluster SN Ia data, but relax the single-burst assumption. Instead, we allow for a range of star-formation histories and dust extinctions for each cluster. Via MCMC modeling, we simultaneously fit, using stellar population synthesis models and DTD models, the integrated galaxy-light photometry in several bands, and the SN Ia numbers discovered in each cluster. With these more-realistic assumptions, we find a best-fit DTD with power-law index $α=-1.09_{-0.12}^{+0.15}$, and amplitude $R_1=0.41_{-0.10}^{+0.12}\times 10^{-12}~{\rm yr}^{-1}{\rm M}_\odot^{-1}$. We confirm a cluster-environment DTD with a larger amplitude than the field-galaxy DTD, by a factor $\sim2-3$ (at $3.8σ$). Cluster and field DTDs have consistent slopes of $α\approx-1.1$.
description: 14 pages, 4 figures, accepted by MNRAS
Examples of writing by Ray Freeman from RAY FREEMAN. 6 January 1932 — 1 May 2022
Creators: name: Keeler, James
name: Morris, Gareth A.
Publisher: name: The Royal Society
Year: 2024
Subjects: classificationCode: 340702
subject: Radiation and matter

description: Ray Freeman pioneered many of the important advances in the technique of liquid-state nuclear magnetic resonance spectroscopy: he changed fundamentally the ways in which chemists and structural biologists use NMR. Born in Nottingham, he was an undergraduate chemistry student at Oxford after National Service working with radar, and completed his Part II and doctoral research with Rex Richards (FRS 1959). After brief spells with Anatole Abragam (ForMemRS 1983) in Saclay, France, and at the National Physical Laboratory in Teddington, he worked for 10 years in the research department of Varian Associates, Palo Alto, USA. He was appointed as lecturer in physical chemistry and tutorial fellow of Magdalen College, Oxford, in 1973, and subsequently promoted to Aldrichian praelector. In 1987 he was appointed to the John Humphrey Plummer chair at the University of Cambridge, where he remained active in research long after his retirement in 1999, publishing his last paper at the age of 84.
Laser flash analysis of irradiated amorphous carbon stripper foils
Creators: name: Urban, M.
name: Kupka, K.
name: Tomut, M.
name: Hubert, C.
name: Romanenko, A.
name: Lommel, B.
name: Trautmann, C.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Heavy ion induced radiation effects in novel molybdenum-carbide graphite composite materials
Creators: name: Tomut, M.
name: Xu, Y.
name: Bolz, P.
name: Carra, F.
name: Quaranta, E.
name: Hermes, P.
name: Bertarelli, A.
name: Stefano, R.
name: Rossi, A.
name: Bizzaro, S.
name: Trautmann, C.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Lysozyme recognition with aptamer-modified cylindrical nanopores
Creators: name: Ali, M.
name: Nasir, S.
name: Trautmann, C.
name: Ensinger, W.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Relativistic effective action of dynamical gravitomagnetic tides for slowly rotating neutron stars
Creators: name: Gupta, Pawan Kumar
name: Steinhoff, Jan
name: Hinderer, Tanja
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Gravitomagnetic quasi-normal modes of neutron stars are resonantly excited by tidal effects during a binary inspiral, leading to a potentially measurable effect in the gravitational-wave signal. We take an important step towards incorporating these effects in waveform models by developing a relativistic effective action for the gravitomagnetic dynamics that clarifies a number of subtleties. Working in the slow-rotation limit, we first consider the post-Newtonian approximation and explicitly derive the effective action from the equations of motion. We demonstrate that this formulation opens a way to compute mode frequencies, yields insights into the relevant matter variables, and elucidates the role of a shift symmetry of the fluid properties under a displacement of the gravitomagnetic mode amplitudes. We then construct a fully relativistic action based on the symmetries and a power counting scheme. This action involves four coupling coefficients that depend on the internal structure of the neutron star and characterize the key matter parameters imprinted in the gravitational waves. We show that, after fixing one of the coefficients by normalization, the other three directly involve the two kinds of gravitomagnetic Love numbers (static and irrotational), and the mode frequencies. We discuss several interesting features and dynamical consequences of this action, and analyze the frequency-domain response function (the frequency-dependent ratio between the induced flux quadrupole and the external gravitomagnetic field), and a corresponding Love operator representing the time-domain response. Our results provide the foundation for deriving precision predictions of gravitomagnetic effects, and the nuclear physics they encode, for gravitational-wave astronomy.
description: 20 pages; v2: added time domain response/Love operator and discussion of electric driving, minor typos corrected, submitted to journal; v3: extended discussion; v4: published
XPS measurements on single Bi$_{2}$Te$_{3}$ nanowires fabricated by electrodeposition in etched ion-track membranes
Creators: name: Krieg, J.
name: Chen, C.
name: Avila, J.
name: Trautmann, C.
name: Asensio, M. C.
name: Toimil Molares, M. E.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2015
Subjects: Physics

description: GSI Scientific Report 2014 - GSI Report 2015-1
Optimal strategy for controlling transport in inertial Brownian motors
Creators: name: Machura, Lukasz
name: Kostur, Marcin
name: Marchesoni, Fabio
name: Talkner, Peter
name: Hänggi, Peter
name: Luczka, Jerzy
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In order to optimize the directed motion of an inertial Brownian motor, we identify the operating conditions that both maximize the motor current and minimize its dispersion. Extensive numerical simulation of an inertial rocked ratchet displays that two quantifiers, namely the energetic efficiency and the Péclet number (or equivalently the Fano factor), suffice to determine the regimes of optimal transport. The effective diffusion of this rocked inertial Brownian motor can be expressed as a generalized fluctuation theorem of the Green -- Kubo type. Addendum and Erratum The expression for the effective diffusion of an inertial, periodically driven Brownian particle in an asymmetric, periodic potential is compared with the step number diffusion which is extracted from the corresponding coarse grained hopping process specifying the number of covered spatial periods within each temporal period. The two expressions are typically different and involve the correlations between the number of hops.
description: Original paper: 14 pages, 7 figures, published in J. Phys.: Condens. Matter, as part of the special issue on Molecular Motors; Addendum and Erratum: 3 pages, 2 figures, published in J. Phys.: Condens. Matter