cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The role of discrete-particle noise in the Ostwald ripening
Creators: name: Meerson, Baruch
name: Sander, Leonard M.
name: Smereka, Peter
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigate the role of discrete-particle noise in interface-controlled Ostwald ripening. We introduce the noise within the framework of the Becker-Doering equations, and employ both Monte Carlo simulations and direct numerical solution of these equations. We find that the noise drives the system towards a unique scaling regime describable by a limiting solution of a classical continuum theory due to Lifshitz, Slyozov and Wagner. The convergence towards the scaling solution is extremely slow, and we report a systematic deviation between the observed small correction to scaling and a theoretical prediction of this quantity.
description: 7 pages, 4 figures, to appear in Europhys. Lett
Tear Down this Wall: On the Persistence of Borders in Trade
Creators: name: Nitsch, Volker
name: Wolf, Nikolaus
name: Nitsch, Volker
name: Wolf, Nikolaus
Publisher: name: Unknown
Year: 2009
Subjects: subject: Financial Economics
subject: integration
subject: home bias
subject: globalization

description: Why do borders still matter for economic activity? The reunification of Germany in 1990 provides a unique natural experiment for examining the effect of political borders on trade both in the cross-section and over time. With the fall of the Berlin Wall and the rapid formation of a political and economic union, strong and strictly enforced administrative barriers to trade between East Germany and West Germany were eliminated completely within a very short period of time. The evolution of intraGerman trade flows after reunification then provides new insights for both the globalization and border effects literatures. Our estimation results show a remarkable persistence in intra-German trade patterns along the former East-West border; political integration is not rapidly followed by economic integration. Instead, we estimate that it takes at least one generation (between 33 and 40 years or more) to remove the impact of political borders on trade. This finding strongly suggests that border effects are neither statistical artefacts nor mainly driven by administrative or “red tape” barriers to trade, but arise from economic fundamentals.
Optimal lattice domain-wall fermions with finite Ns
Creators: name: Chiu, Ting-Wai
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: I review the lattice formulations of vector-like gauge theories (e.g. QCD) with domain-wall fermions, and discuss how to optimize the chiral symmetry for any finite N_s (in the fifth dimension), as well as to eliminate its dependence on a_5.
description: 7 pages, Invited talk given at 2002 International Workshop on Strong Coupling Gauge Theories and Effective Field Theories (SCGT02), Nagoya, Japan, 10-13 Dec 2002
title: Definiowanie zieleni w planowaniu przestrzennym na przykładzie Poznania
Creators: name: Skórzewski, Wojciech
Publisher: name: Publishing House of Poznan University of Technology
Year: 2020

description: Zeszyty Naukowe Politechniki Poznańskiej. Architektura, Urbanistyka, Architektura wnętrz, 1, 209-225
Additional file 11 of Exercising with Baxter: preliminary support for assistive social-physical human-robot interaction
Creators: name: Fitter, Naomi T.
name: Mohan, Mayumi
name: Kuchenbecker, Katherine J.
name: Johnson, Michelle J.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 11 Gameplay flow of the Handclap Game.
Cutting and slicing weak solids
Creators: name: Mora, Serge
name: Pomeau, Yves
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Dicing soft solids with a sharp knife is quicker and smoother if the blade is sliding rapidly parallel to its edge in addition to the normal squeezing motion. We explain this common observation with a consistent theory suited for soft gels and departing from the standard theories of elastic fracture mechanics developed for a century. The gel is assumed to locally fail when submitted to stresses exceeding a threshold $σ_1$. The changes in its structure generate a liquid layer coating the blade and transmitting the stress through viscous forces. The driving parameters are the ratio $U/W$ of the normal to the tangential velocity of the blade, and the characteristic length $ηW/σ_1$, with $η$ the viscosity of the liquid. The existence of a maximal value of $U/W$ for a steady regime explains the crucial role of the tangential velocity for slicing biological and other soft materials.
Additional file 13 of Exercising with Baxter: preliminary support for assistive social-physical human-robot interaction
Creators: name: Fitter, Naomi T.
name: Mohan, Mayumi
name: Kuchenbecker, Katherine J.
name: Johnson, Michelle J.
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 13 Gameplay flow of the Roboga Game.
Parallelopora Bargatzky 1881
Creators: name: Webby, Barry D.
name: Zhen, Yong Yi
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Cnidaria
Hydrozoa
Anthoathecata
Hydractiniidae
Parallelopora

description: Parallelopora Bargatzky, 1881
 Type species. Parallelopora ostiolata Bargatzky, 1881.
description: Published as part of Webby, Barry D. & Zhen, Yong Yi, 2008, Devonian Syringostromatid Stromatoporoids from the Broken River Region, North Queensland, pp. 215-236 in Records of the Australian Museum 60 (3) on page 233, DOI: 10.3853/j.0067-1975.60.2008.1497, http://zenodo.org/record/4676531
Podcasting as public media : The future of U.S. news, public affairs and educational podcasts
Creators: name: Aufderheide, Patricia
name: Lieberman, David
name: Alkhallouf, Atika
name: Ugboma, Jiji Majiri
Publisher: name: International Journal of Communication
Year: 2023
Subjects: classificationCode: 4701
subject: Communication and media studies

description: Description to be added
On Magnetic solution to 2+1 Einstein--Maxwell gravity
Creators: name: Cataldo, M.
name: Crisostomo, J.
name: del Campo, S.
name: Salgado, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The three--dimensional magnetic solution to the Einstein--Maxwell field equations have been considered by some authors. Several interpretations have been formulated for this magnetic spacetime. Up to now this solution has been considered as a two--parameter self--consistent field. We point out that the parameter related to the mass of this solution is just a pure gauge and can be rescaled to minus one. This implies that the magnetic metric has really a simple form and it is effectively one-parameter solution, which describes a distribution of a radial magnetic field in a 2+1 anti--de Sitter background space--time. We consider an alternative interpretation to the Dias--Lemos one for the magnetic field source.
description: 3 pages, accepted for publication
Aphelion Cloud Belt Phase Function Investigations with Mars Color Imager (MARCI)
Creators: name: Cooper, Brittney A.
name: Moores, John E.
name: Battalio, Joseph M.
name: Guzewich, Scott D.
name: Smith, Christina L.
name: Modestino, Rachel C. N.
name: Tabascio, Michael V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper constrains the scattering phase function of water ice clouds (WICs) found within Mars' Aphelion Cloud Belt (ACB), determined from orbit by processing publicly available raw Mars Color Imager (MARCI) data spanning solar longitudes (Ls) 42-170 during Mars Years (MYs) 28 and 29. MARCI visible wavelength data were calibrated and then pipeline-processed to select the pixels most likely to possess clouds. Mean phase function curves for the MARCI blue filter data were derived, and for all seasons investigated, modeled aggregates, plates, solid and hollow columns, bullet rosettes, and droxtals were all found to be plausible habits. Spheres were found to be the least plausible, but still possible. Additionally, this work probed the opposition surge to examine the slope of the linear relationship between column ice water content and cloud opacity on Mars, and found a significant dependence on particle radius. The half-width-half-maxima (HWHM) of the visible 180 degree peak of five MARCI images were found to agree better with modeled HWHM for WICs than with modeled HWHM for dust.
description: 45 pages, 12 figures, preprint for the Journal of Planetary and Space Science
Fluctuations in galactic bar parameters due to bar-spiral interaction
Creators: name: Hilmi, T.
name: Minchev, I.
name: Buck, T.
name: Martig, M.
name: Quillen, A. C.
name: Monari, G.
name: Famaey, B.
name: de Jong, R. S.
name: Laporte, C. F. P.
name: Read, J.
name: Sanders, J. L.
name: Steinmetz, M.
name: Wegg, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the late-time evolution of the central regions of two Milky Way-like simulations of galaxies formed in a cosmological context, one hosting a fast bar and the other a slow one. We find that bar length, R_b, measurements fluctuate on a dynamical timescale by up to 100%, depending on the spiral structure strength and measurement threshold. The bar amplitude oscillates by about 15%, correlating with R_b. The Tremaine-Weinberg-method estimates of the bars' instantaneous pattern speeds show variations around the mean of up to ~20%, typically anti-correlating with the bar length and strength. Through power spectrum analyses, we establish that these bar pulsations, with a period in the range ~60-200 Myr, result from its interaction with multiple spiral modes, which are coupled with the bar. Because of the presence of odd spiral modes, the two bar halves typically do not connect at exactly the same time to a spiral arm, and their individual lengths can be significantly offset. We estimated that in about 50% of bar measurements in Milky Way-mass external galaxies, the bar lengths of SBab type galaxies are overestimated by ~15% and those of SBbc types by ~55%. Consequently, bars longer than their corotation radius reported in the literature, dubbed "ultra-fast bars", may simply correspond to the largest biases. Given that the Scutum-Centaurus arm is likely connected to the near half of the Milky Way bar, recent direct measurements may be overestimating its length by 1-1.5 kpc, while its present pattern speed may be 5-10 km/s/kpc smaller than its time-averaged value.
description: 25 p., 19 figures, Accepted to MNRAS
A Simple Model for Nonexponential Relaxation in Complex Dynamics
Creators: name: Perez-Madrid, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The nonexponential relaxation ocurring in complex dynamics manifested in a wide variety of systems is analyzed through a simple model of diffusion in phase space. It is found that the inability of the system to find its equilibrium state in any time scale becomes apparent in an effective temperature field which leads to a hierarchy of relaxation times responsible for the slow relaxation phenomena.
Evaluation of Automatic FPGA Offloading for Loop Statements of Applications
Creators: name: Yamato, Yoji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: In recent years, with the prediction of Moore's law slowing down, utilization of hardware other than CPU such as FPGA which is energy effective is increasing. However, when using heterogeneous hardware other than CPUs, barriers of technical skills such as OpenCL are high. Based on that, I have proposed environment adaptive software that enables automatic conversion, configuration, and high-performance operation of once written code, according to the hardware to be placed. Partly of the offloading to the GPU was automated previously. In this paper, I propose and evaluate an automatic extraction method of appropriate offload target loop statements of source code as the first step of offloading to FPGA. I evaluate the effectiveness of the proposed method using an existing application.
description: 7 pages, 4 figure, in Japanese, IEICE Technical Report, SWIM2019-25
Impact-parameter dependence of the generalized parton distribution of the pion in chiral quark models
Creators: name: Broniowski, Wojciech
name: Arriola, Enrique Ruiz
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the off-forward diagonal non-singlet generalized parton distribution of the pion in two distinct chiral quark models: the Nambu-Jona-Lasinio model with the Pauli-Villars regulator and the Spectral Quark Model. The analysis is carried out in the impact-parameter space. Leading-order perturbative QCD evolution is carried out via the inverse Mellin transform in the index space. The model predictions agree very reasonably with the recent results from transverse-lattice calculations, reproducing qualitatively both the Bjorken-x and the impact-parameter dependence of the data.
description: 13 pages, 3 figures, to appear in Phys. Lett. B
Bernini, Borromini, and the Politics of Papal Patronage
Creators: name: Colligan, Kelly
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Globular Clusters in Dwarf Galaxies
Creators: name: Bergh, Sidney van den
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Data are presently available on the luminosities and half-light radii of 101 globular clusters associated with low-luminosity parent galaxies. The luminosity distribution of globulars embedded in dwarf galaxies having $M_{v} > -16$ is found to differ dramatically from that for globular clusters surrounding giant host galaxies with $M_{v} < -16$. The luminosity distribution of globular clusters in giant galaxies peaks at $M_{v} \sim -7.5$, whereas that for dwarfs is found to increases monotonically down to the completeness limit of the cluster data at $M_{v} \sim -5.0$. Unexpectedly, the power law distribution of the luminosities of globular clusters hosted by dwarf galaxies is seen to be much flatter than the that of bright unevolved part of the luminosity distribution of globular clusters associated with giant galaxies. The specific frequency of globular clusters that are fainter than $M_{v} = -7.5$ is found to be particularly high in dwarf galaxies. The luminosity distribution of the LMC globular clusters is similar to that in giant galaxies, and differs from those of the globulars in dwarf galaxies. The present data appear to show no strong dependence of globular cluster luminosity on the morphological types of their parent galaxies. No attempt is made to explain the unexpected discovery that the luminosity distribution of globular clusters is critically dependent on parent galaxy luminosity (mass?), but insensitive to the morphological type of their host galaxy.
description: Figure 6 replaced to be published in the Astronomical Journal
Little Supersymmetry and the Supersymmetric Little Hierarchy Problem
Creators: name: Birkedal, Andreas
name: Chacko, Z.
name: Gaillard, Mary K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The current experimental lower bound on the Higgs mass significantly restricts the allowed parameter space in most realistic supersymmetric models, with the consequence that these models exhibit significant fine-tuning. We propose a solution to this `supersymmetric little hierarchy problem'. We consider scenarios where the stop masses are relatively heavy - in the 500 GeV to a TeV range. Radiative stability of the Higgs soft mass against quantum corrections from the top quark Yukawa coupling is achieved by imposing a global SU(3) symmetry on this interaction. This global symmetry is only approximate - it is not respected by the gauge interactions. A subgroup of the global symmetry is gauged by the familiar SU(2) of the Standard Model. The physical Higgs is significantly lighter than the other scalars because it is the pseudo-Goldstone boson associated with the breaking of this symmetry. Radiative corrections to the Higgs potential naturally lead to the right pattern of gauge and global symmetry breaking. We show that both the gauge and global symmetries can be embedded into a single SU(6) grand unifying group, thereby maintaining the prediction of gauge coupling unification. Among the firm predictions of this class of models are new states with the quantum numbers of 10 and $\bar{10}$ under SU(5) close to the TeV scale. The Higgs mass is expected to be below 130 GeV, just as in the MSSM.
description: 25 pages; minor corrections, references added
Fourier Amplitude Distribution and Intermittency in Mechanically Generated Surface Gravity Waves
Creators: name: Fadaeiazar, Elmira
name: Leontini, Justin
name: Onorato, Miguel
name: Waseda, Takuji
name: Alberello, Alberto
name: Toffoli, Alessandro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We examine and discuss the spatial evolution of the statistical properties of mechanically generated surface gravity wave fields, initialised with unidirectional spectral energy distributions, uniformly distributed phases and Rayleigh distributed amplitudes. We demonstrate that nonlinear interactions produce an energy cascade towards high frequency modes with a directional spread and triggers localised intermittent bursts. By analysing the probability density function of Fourier mode amplitudes in the high frequency range of the wave energy spectrum, we show that a heavy-tailed distribution emerges with distance from the wave generator as a result of these intermittent bursts, departing from the originally imposed Rayleigh distribution, even under relatively weak nonlinear conditions.
The c-axis transport in naturally-grown Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ cross-whisker junctions
Creators: name: Latyshev, Yu. I.
name: Orlov, A. P.
name: Nikitina, A. M.
name: Monceau, P.
name: Klemm, R. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We studied the c-axis transport of Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ (Bi2212) cross-whisker junctions formed by annealing ``naturally'' formed whisker junctions. These frequently appear during growth when the $ab$-faces of neighboring whiskers come in contact. We obtained Fraunhofer patterns of the cross-junction critical currents in a parallel magnetic field, and found a sharp increase in the quasiparticle tunneling conductance at $eV=50-60$ mV, indicating high junction quality. For our weak junctions, the interface critical current density is about 0.03 of the critical current density across the stack of bulk intrinsic junctions, as is the room temperature conductivity, and is independent of the twist angle, in contrast to most of the data reported on ``artificial'' cross-whisker junctions [Y. Takano {\it et al.}, Phys. Rev. B {\bf 65}, 140513(R) (2002)]. Our results provide strong evidence of incoherent interface tunneling and for at least a small s-wave order parameter component in the bulk of Bi2212 for $T\le T_c$. They are also consistent with the bicrystal twist experiments of Li {\it et al.} [Phys. Rev. Lett. {\bf 83}, 4160 (1999)].
description: 6 pages, five figures, submitted to Phys. Rev. B
Genius, Gender, and Symbolism : A Look at the Art of Camille Claudel
Creators: name: Colligan, Kelly
name: Broude, Norma
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
An investigation into ECO-TEK's Solar Aquatics System (SAS) for the UBC Farm centre building
Creators: name: Khan, Asad
name: Singh, Harshanvit
name: Henderson, Sean
name: Shuen, Wesley
Publisher: name: The University of British Columbia
Year: 2014

description: The University of British Columba Farm (UBC Farm) has always been known to practice and promote the concept of sustainability. Currently, it plans to construct a new farm centre building to be used for food production operations and educational purposes. This building is exploiting the use of an appropriate wastewater treatment system to help reduce water costs and consumption. This report looks at the ECO-TEK Solar Aquatics System (SAS) as a potential solution and conducts a triple bottom line (TBL) assessment on this system, and analyzes the quality of such a solution. Using past research, an in-person interview with the Kimron Rink, the president of ECO-TEK and the designer of the SAS, and a short social survey, it can be seen that the SAS is an existing quality solution with high potential to scale and adapt into the new UBC farm building. Environmentally, the SAS is a good technological solution to treat wastewater, reduce energy consumption, greenhouse gases, and other resources needed. Economically, the SAS is not currently viable with the amount of water the farm requires, although it will reduce its annual water consumption expenditure. Socially, the SAS provides great opportunities for research development, promoting sustainable engineering design, and potential work and volunteer jobs and positions for the community. As a result, the SAS is recommended as an acceptable solution for meeting most of the UBC Farm’s goals. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
High-Precision Lattice QCD Confronts Experiment
Creators: name: Davies, C. T. H.
name: Follana, E.
name: Gray, A.
name: Lepage, G. P.
name: Mason, Q.
name: Nobes, M.
name: Shigemitsu, J.
name: Trottier, H. D.
name: Wingate, M.
name: Aubin, C.
name: Bernard, C.
name: Burch, T.
name: DeTar, C.
name: Gottlieb, Steven
name: Gregory, E. B.
name: Heller, U. M.
name: Hetrick, J. E.
name: Osborn, J.
name: Sugar, R.
name: Toussaint, D.
name: Di Pierro, M.
name: El-Khadra, A.
name: Kronfeld, A. S.
name: Mackenzie, P. B.
name: Menscher, D.
name: Simone, J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We argue that high-precision lattice QCD is now possible, for the first time, because of a new improved staggered quark discretization. We compare a wide variety of nonperturbative calculations in QCD with experiment, and find agreement to within statistical and systematic errors of 3% or less. We also present a new determination of alpha_msbar(Mz); we obtain 0.121(3). We discuss the implications of this breakthrough for phenomenology and, in particular, for heavy-quark physics.
description: 2 figures, revtex
Cleridae Latreille 1802
Creators: name: Bartlett, Justin S.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cleridae

description: Key to Cleridae of Lord Howe Island  1 Fourth tarsomere conspicuous, not hidden within lobes of the third............................................. 2
—— Fourth tarsomere small, cylindrical, hidden within lobes of the third........................................... 3
 2 Large (> 10 mm) brown flightless species.............................................. Cormodes darwini Pascoe
 —— Small (<10 mm) dark metallic green species........................................ Lemidia subaenea Gorham
3 Prothorax with distinct lateral carina............................................................................................. 4
 —— Prothorax without distinct lateral carina........................................... Tarsostenodes howensis n.sp.
 4 Elytra orange with a broad dark postbasal band............................... Thriocerodes bipartitus (Pic)
 —— Elytra black with pale X-shaped markings...................................... Thriocerodes decussates n.sp.
description: Published as part of Bartlett, Justin S., 2009, The Cleridae of Lord Howe Island, with Descriptions of Two New Species (Coleoptera: Cleroidea), pp. 225-228 in Records of the Australian Museum 61 (3) on page 228, DOI: 10.3853/j.0067-1975.61.2009.1530, http://zenodo.org/record/4676573
Resonant and anti-resonant frequency dependence of the effective parameters of metamaterials
Creators: name: Koschny, T.
name: Markos, P.
name: Smith, D. R.
name: Soukoulis, C. M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a numerical study of the electromagnetic response of the metamaterial elements that are usedto construct materials with negative refractive index. For an array of split ring resonators (SRR) we find that the resonant behavior of the effective magnetic permeability is accompanied by an anti-resonant behavior of the effective permittivity. In addition, the imaginary parts of the effective permittivity and permeability are opposite in sign. We also observe an identical resonant versus anti-resonant frequency dependence of the effective materials parameters for a periodic array of thin metallic wires with cuts placed periodically along the length of the wire, with roles of the permittivity and permeability reversed from the SRR case. We show in a simple manner that the finite unit cell size is responsible for the anti-resonant behavior.
Fully-Discrete Explicit Locally Entropy-Stable Schemes for the Compressible Euler and Navier-Stokes Equations
Creators: name: Ranocha, Hendrik
name: Dalcin, Lisandro
name: Parsani, Matteo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 65M12, 65M70, 65L06, 65L20, 65P10, 76M10, 76M20, 76M22, 76N99

description: Recently, relaxation methods have been developed to guarantee the preservation of a single global functional of the solution of an ordinary differential equation. Here, we generalize this approach to guarantee local entropy inequalities for finitely many convex functionals (entropies) and apply the resulting methods to the compressible Euler and Navier-Stokes equations. Based on the unstructured $hp$-adaptive SSDC framework of entropy conservative or dissipative semidiscretizations using summation-by-parts and simultaneous-approximation-term operators, we develop the first discretizations for compressible computational fluid dynamics that are primary conservative, locally entropy stable in the fully discrete sense under a usual CFL condition, explicit except for the parallelizable solution of a single scalar equation per element, and arbitrarily high-order accurate in space and time. We demonstrate the accuracy and the robustness of the fully-discrete explicit locally entropy-stable solver for a set of test cases of increasing complexity.
Exponential Convergence of Cellular Dynamical Mean Field Theory: Reply to the comment by K. Aryanpour, Th. Maier and M. Jarrell (cond-mat/0301460)
Creators: name: Biroli, G.
name: Kotliar, G.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We reply to the comment by K. Aryanpour, Th. Maier and M. Jarrell (cond-mat/0301460) on our paper (Phys. Rev. B {\bf 65} 155112 (2002)). We demonstrate using general arguments and explicit examples that whenever the correlation length is finite, local observables converge exponentially fast in the cluster size, $L_{c}$, within Cellular Dynamical Mean Field Theory (CDMFT). This is a faster rate of convergence than the $1/L_{c}^{2}$ behavior of the Dynamical Cluster approximation (DCA) thus refuting the central assertion of their comment.
description: Reply to the comment by K. Aryanpour, Th. Maier and M. Jarrell (cond-mat/0301460)
De Imitatione Statuarum : An Exploration of Peter Paul Rubens's Early Mythological Paintings
Creators: name: Dean, Amy
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Iron Line Tomography of General Relativistic Hydrodynamic Accretion around Kerr Black Holes
Creators: name: Porter, Kaitlyn
name: Fukumura, Keigo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We consider a temporal response of relativistically broadened line spectrum of iron from black hole accretion irradiated by an X-ray echo under strong gravity. The physical condition of accreting gas is numerically calculated in the context of general relativistic hydrodynamics under steady-state, axisymmetry in Kerr geometry. With the onset of a point-like X-ray flare of a short finite duration just above the accretion surface, the gas is assumed to be ionized to produce a neutral iron fluorescent line. Using a fully relativistic ray-tracing approach, the response of line photons due to the X-ray illumination is traced as a function of time and energy for different source configurations around \sw and Kerr black holes. Our calculations show that the X-ray echo on the accretion surface clearly imprints a characteristic time-variability in the line spectral features depending on those parameters. Simulated line profiles, aimed for the future microcalorimeter missions of large collecting area such as {\it Athena}/X-IFU for typical radio-quiet Seyfert galaxies, are presented to demonstrate that state-of-the-art new observations could differentiate various source parameters by such an X-ray tomographic line reverberation.
description: accepted to ApJ, 6 figs
One of the Four : Anne Vallayer-Coster and the Social Implications of Still Life Painting
Creators: name: Dean, Amy
name: Broude, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Dynamics of Nambu monopole in two Higgs doublet models -- Cosmological Monopole Collider --
Creators: name: Eto, Minoru
name: Hamada, Yu
name: Kurachi, Masafumi
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the dynamics of the Nambu monopole in two Higgs doublet models, which is a magnetic monopole attached by two topological $Z$ strings ($Z$ flux tubes) from two opposite sides. The monopole is a topologically stable solution of the equation of motions when the Higgs potential has global $U(1)$ and $\mathbb{Z}_2$ symmetries. In this paper, we consider more general cases without the $\mathbb{Z}_2$ symmetry, and find that it is no longer a static solution but moves along the $Z$ string being pulled by the heavier string. After analytically constructing an asymptotic form of the monopole, we confirm such a motion using the numerical relaxation method. In addition, we analyze the real time dynamics of the monopole based on a point-like approximation. Consequently, if there were long string networks with the monopoles in the early universe, the monopole accelerates nearly to the speed of light emitting electromagnetic radiations as a synchrotron accelerator, and collides to an anti-monopole on the string. This collision event, which we call the cosmological monopole collider, can produce much heavier particles than those we can see today, e.g., at the Large Hadron Collider.
description: 38 pages, 7 figures. v2: minor revisions, new references added
Correlated and Decorrelated Positional and Orientational Order in the Nucleosomal Core Particle Mesophases
Creators: name: Lorman, V.
name: Podgornik, R.
name: Žekš, B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We investigate the orientational order of transverse polarization vectors of long columns of nucleosomal core particles and their coupling to positional order in high density mesophases discovered recently. Inhomogeneous polar ordering of these columns precipitates crystalization of the 2D sections with different orientations of the transverse polarization vector on each column in the unit cell. We propose possible scenarios for going from the 2D hexagonal phase into distorted lamellar and related phases observed experimentally.
description: 4 pages and 2 figures
title: Shifting sands in Accra, Ghana: the ante-lives of urban form
Creators: name: Dawson, Katherine
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2020

description: This thesis thinks with sand and its fundamental relationship to the making of the city. Sand is a material of our shared contemporary. Constituting roads, buildings, fracking technologies, computer chips, glass and land itself, this grainy material is at ‘the core of our daily lives’ (Beiser, 2018:2). This ubiquity has generated global demand, with sand and gravel constituting the largest volume of solid material extracted worldwide (UNEP, 2014). Yet, despite the centrality of sand to our social reproduction, as well as evidence of its eco-political implications (Beiser, 2018), limited academic work has engaged with this material. Drawing on fourteen months of ethnographic fieldwork in the expanding West African city of Accra, this thesis unpacks more specifically the processes through which sand is drawn into the urban process, or indeed urbanised. While sand – mixed with cement and water – is destined to become part of the city’s expanding urban form, this thesis looks instead to the processes that take shape prior to sand’s manifestation as the material building blocks of the city. In this way, this thesis details the before lives – or ante-lives – of urban form. The thesis details the practices of extraction from mines at the sprawling edges of Accra, engages with the labours that surround sand’s extraction and movement and deploys innovative ways of scripting the anxious worlds of the city’s shifting landscapes. In this way, the thesis shows that urbanisation must be understood as a set of unfolding interfaces between geologic forces, ecological processes, historical conditions, cultural forms and political-economic regimes. Together, the chapters in this thesis present a significant contribution at the articulation of urban political ecology (UPE), geosocial analyses, extractivism, [African] urbanism, postcolonialism, labour practices and ethnography, meanwhile offering up novel ways of reading the shifting landscapes of Accra’s ‘urban now’ (Baloji and De Boeck, 2017).
Tachyons on Dp-branes from Abelian Higgs sphalerons
Creators: name: Brihaye, Yves
name: Hartmann, Betti
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the Abelian Higgs model in a (p+2)-dimensional space time with topology M^{p+1} x S^1 as a field theoretical toy model for tachyon condensation on Dp-branes. The theory has periodic sphaleron solutions with the normal mode equations resembling Lame-type equations. These equations are quasi-exactly solvable (QES) for specific choices of the Higgs- to gauge boson mass ratio and hence a finite number of algebraic normal modes can be computed explicitely. We calculate the tachyon potential for two different values of the Higgs- to gauge boson mass ratio and show that in comparison to previously studied pure scalar field models an exact cancellation between the negative energy contribution at the minimum of the tachyon potential and the brane tension is possible for the simplest truncation in the expansion about the field around the sphaleron. This gives further evidence for the correctness of Sen's conjecture.
description: 14 Latex pages including 3 eps-figures
Thyroid-related Hormones and Hypertension Incidence in Middle-Aged and Older Hispanic/Latino Adults: The HCHS/SOL Study
Creators: name: Daviglus, Martha
name: Sargis, Robert M
name: Freels, Sally
name: Argos, Maria
name: Abasilim, Chibuzor
name: Persky, Victoria
name: Thyagarajan, Bharat
name: Turyk, Mary E
name: Talavera, Gregory A
name: Isasi, Carmen R
name: Tsintsifas, Konstantina
name: Peters, Brandilyn A
name: Cai, Jianwen
Publisher: name: The Endocrine Society
Year: 2024

description:
Background: Thyroid-related hormones act to regulate metabolic pathways and blood pressure (BP). However, the relationship of TSH and peripheral thyroid hormones and the role of the hypothalamic-pituitary-thyroid axis on hypertension development is not fully understood. We assessed sex-specific associations of thyroid-related hormones with BP and hypertension in Hispanic/Latino adults followed for 6 years. Methods: We studied 1789 adults, ages 45 to 74, free of diabetes at baseline from a subcohort of the Hispanic Community Health Study/Study of Latinos. We assessed TSH, free T4 (FT4), T3, and various indicators of thyroid axis. Using multivariable linear and Poisson regression adjusted for survey design and confounding variables, we estimated a priori sex-specific associations of thyroid-related hormones with changes in BP and hypertension development. Results: In men and women, TSH and TSH/FT4 ratios were associated with changes in diastolic BP and T3 with changes in pulse pressure and the development of hypertension from prehypertension. In men, a 1-SD increase in TSH [incident rate ratio (IRR) = 1.42; 95% confidence interval (CI): 1.15, 1.75] and TSH/FT4 ratio (IRR = 1.20; 95% CI: 1.07, 1.35) were positively associated with the development of hypertension from prehypertension while the TSH/FT4 ratio (IRR = 0.85; 95% CI: .72, 1.00) was protective in women. We observed sex-specific differences in associations of the T3/FT4 ratio and indices of pituitary sensitivity to thyroid hormones with changes in pulse pressure and hypertension development. Conclusion: Thyroid-related hormones are associated with sex-specific changes in BP and hypertension among Hispanic/Latino adults consistent with selected studies conducted in other populations. Mechanisms underlying associations of pituitary sensitivity to thyroid hormones with BP and hypertension development warrant further study.
Additional file 1 of Preventive healthcare uptake in private hospitals in Nigeria: a cross-sectional survey (Nisa premier hospital)
Creators: name: Ofoli, Joshua N. T.
name: Ashau-Oladipo, Timi
name: Hati, Stephen S.
name: Lile Ati
name: Ede, Victor
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: 60506 Virology
subject: FOS: Biological sciences

description: Additional file 1.
Caravaggio's Bacchus : Classics, Androgyny and Patronage
Creators: name: Dellaccio, Laurie
name: Butler Wingfield, Kim
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 3601
subject: Art history, theory and criticism

description: Research paper submitted to American University in partial fulfillment of the Degree of Master of Arts; approved as non-thesis option
Visible and near-infrared spectro-interferometric analysis of the edge-on Be star $ο$ Aquarii
Creators: name: de Almeida, E. S. G.
name: Meilland, A.
name: de Souza, A. Domiciano
name: Stee, P.
name: Mourard, D.
name: Nardetto, N.
name: Ligi, R.
name: Tallon-Bosc, I.
name: Faes, D. M.
name: Carciofi, A. C.
name: Bednarski, D.
name: Mota, B. C.
name: Turner, N.
name: Brummelaar, T. A. ten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present a detailed visible and near-IR spectro-interferometric analysis of the Be-shell star $ο$ Aquarii from quasi-contemporaneous CHARA/VEGA and VLTI/AMBER observations. We measured the stellar radius of $ο$ Aquarii as 4.0 $\pm$ 0.3 $\mathrm{R_{\odot}}$. We constrained the disk geometry and kinematics using a kinematic model and a MCMC fitting procedure. The disk sizes in H$α$ and Br$γ$ were found to be similar, at $\sim$10-12 $\mathrm{D_{\star}}$, which is uncommon since most results for Be stars show a larger extension in H$α$ than in Br$γ$. We found that the inclination angle $i$ derived from H$α$ is significantly lower ($\sim$15 deg) than the one derived from Br$γ$. The disk kinematics were found to be near to the Keplerian rotation in Br$γ$, but not in H$α$. After analyzing all our data using a grid of HDUST models (BeAtlas), we found a common physical description for the disk in both lines: $Σ_{0}$ = 0.12 g cm\textsuperscript{-2} and $m$ = 3.0. The stellar rotational rate was found to be very close ($\sim$96\%) to the critical value. Our analysis of multi-epoch H$α$ profiles and imaging polarimetry indicates that the disk has been stable for at least 20 years. Compared to Br$γ$, the data in H$α$ shows a substantially different picture that cannot fully be understood using the current physical models of Be star disks. $ο$ Aquarii presents a stable disk, but the measured $m$ is lower than the standard value in the VDD model for steady-state. Such long-term stability can be understood in terms of the high rotational rate for this star, the rate being a main source for the mass injection in the disk. Our results on the stellar rotation and disk stability are consistent with results in the literature showing that late-type Be stars are more likely to be fast rotators and have stable disks.
description: 24 pages, 17 figures, accepted for publication in Astronomy & Astrophysics on 06/02/2020. Abstract shortened to fit within arXiv character limit
OPLEIDINGSBEHOEFTES VAN KOMMERSIeLE B OERDERYONDERNEMERS IN 'N VERANDERENDE SUID-AFRIKAANSE OMGE WING
Training needs of commercial farmers in a changing South African environment
Creators: name: Erasmus, B. J.
name: Hough, J.
name: Erasmus, B. J.
name: Hough, J.
Publisher: name: Unknown
Year: 1994
Subjects: Agricultural and Food Policy
Farm Management
Teaching/Communication/Extension/Profession

description: Fast changes in the socio-economical, political, natural and technological environments, necessitates farmers to investigate the impact of these factors on their enterprises and to continually evaluate their needs for management training. An empirical investigation into the present (1993) and future (1996) importance of the above mentioned variables on 1093 selected commercial farm enterprises and the identification of management training needs have been executed. The importance of the environmental variables are statistically reported and the need for management training are prioritised. Recommendations are also made to satisfy future training needs.
Galactic metallicity distribution from open clusters
Creators: name: Chen, L.
name: Hou, J. L.
name: Wang, J. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have compiled two new Galactic open cluster catalogues. The first one has 119 objects with age, distance and metallicity data, while the second one has 144 objects with both absolute proper motion and radial velocity data, of which 45 clusters also with metallicity data available. An iron radial gradient of about $-0.063\pm$0.008 \dexkpc is obtained from our sample. By dividing clusters into age groups, we show that iron gradient was steeper in the past. A disk age-metallicity relation could very probably exist based on the current sample.
description: 2 pages, conference proceeding IAU General Assembly 2003, Sydney, Symposium 217: Recycling Intergalactic and Interstellar Matter. eds. P.-A. Duc, J. Braine and E. Brinks
Additional file 1 of The fiscal value of human lives lost from coronavirus disease (COVID-19) in China
Creators: name: Joses M. Kirigia
name: Muthuri, Rose Nabi Deborah Karimi
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Plant Biology

description: Additional file 1: Illustration of calculation of fiscal value of human lives lost due to COVID-19 in China.
DIE OORSAKE VAN BEDRYFSKONSENTRASIE IN DIE ROOIVLEISBEDRYF VAN SUID-AFRIKA IN PERSPEKTIEF
The causes of trade concentration in the red meat industry of South Africa in perspective
Creators: name: Fourie, Frederick C. V. N.
name: Venter, Wilbie
name: Fourie, Frederick C. V. N.
name: Venter, Wilbie
Publisher: name: Unknown
Year: 1994
Subjects: International Relations/Trade
Livestock Production/Industries

description: Inadequate proof exists for the sentiment that the current trade concentration in the red meat industry can primarily or even exclusively be laid at the door of the Meld Board's Meat Scheme. Trade concentration already existed prior to the establishment of the Meat Board and the Scheme, and would probably have taken place in any case. The Meat Board most likely only contributed to the momentum and maintenance of the concentration process. Secondly, concentration cannot be regarded simplistically as being the result of government interference. Such view is a denial of the problematic nature of economic power concentration and effective competition. The truth probably contains many more nuances. Thirdly, as far as policy is concerned, the narrow and one-sided identification of a simple (alleged) cause should not serve as a basis for an equally simple policy proposal. Contrary to certain arguments the concentration levels in the red meat industry would probably remain unchanged in an unregulated environment. A more creative solution than simple government withdrawal and deregulation will have to be sought.