cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Influence of surface roughness on superhydrophobicity
Creators: name: Yang, C.
name: Tartaglino, U.
name: Persson, B. N. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Superhydrophobic surfaces, with liquid contact angle theta greater than 150 degree, have important practical applications ranging from self-cleaning window glasses, paints, and fabrics to low-friction surfaces. Many biological surfaces, such as the lotus leaf, have hierarchically structured surface roughness which is optimized for superhydrophobicity through natural selection. Here we present a molecular dynamics study of liquid droplets in contact with self-affine fractal surfaces. Our results indicate that the contact angle for nanodroplets depends strongly on the root-mean-square surface roughness amplitude but is nearly independent of the fractal dimension D_f of the surface.
description: 5 Pages, 6 figures. Minimal changes with respect to the previous version
Quadratic Deformations of Lie-Poisson Structures
Creators: name: Lin, Qian
name: Liu, Zhangju
name: Sheng, Yunhe
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this letter, first we give a decomposition for any Lie-Poisson structure $π_g$ associated to the modular vector. In particular, $π_g$ splits into two compatible Lie-Poisson structures if $dim{g} \leq 3$. As an application, we classified quadratic deformations of Lie-Poisson structures on $\mathbb R^3$ up to linear diffeomorphisms.
description: 14 pages, no figure
Hints for a gravitational constant transition in Tully-Fisher data
Creators: name: Alestas, George
name: Antoniou, Ioannis
name: Perivolaropoulos, Leandros
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use an up to date compilation of Tully-Fisher data to search for transitions in the evolution of the Tully-Fisher relation. Using an up to date data compilation, we find hints at $\approx 3σ$ level for a transition at critical distances $D_c \simeq 9 Mpc$ and $D_c \simeq 17 Mpc$. We split the full sample in two subsamples according to the measured galaxy distance with respect to a splitting distance $D_c$ and identify the likelihood of the best fit slope and intercept of one sample with respect to the best fit corresponding values of the other sample. For $D_c \simeq 9 Mpc$ and $D_c \simeq 17 Mpc$ we find a tension between the two subsamples at a level of $Δχ^2 > 17\; (3.5σ)$. Using a Monte-Carlo simulation we demonstrate that this result is robust with respect to random statistical and systematic variations of the galactic distances. If the tension is interpreted as due to a gravitational strength transition, it would imply a shift of the effective gravitational constant to lower values for distances larger than $D_c$ by $\frac{ΔG}{G}\simeq -0.1$. Such a shift is of the anticipated sign and magnitude but at somewhat lower distance (redshift) than the gravitational transition recently proposed to address the Hubble and growth tensions ($\frac{ΔG}{G}\simeq -0.1$ at transition redshift $z_t\lesssim 0.01$ ($D_c\lesssim 40 Mpc$)).
description: 15 pages, 7 figures, 3 tables. Added Monte Carlo simulation to compare real data with homogenized Monte Carlo dataset. Invited article published in Universe 2021, 7(10), 366 (https://www.mdpi.com/2218-1997/7/10/366). The numerical analysis files that were used for the reproduction of the figures may be downloaded from https://github.com/GeorgeAlestas/Tully_Fisher_Transition
The invisible woman : a feminist critique of Habermas's theory of communicative action
Creators: name: Travers, Ann
Publisher: name: University of British Columbia
Year: 2010

description: Feminist theory is a vast area of discourse and, while the differences between the many tendencies are extremely interesting, it is beyond the scope of this thesis to engage in such an inquiry. I have chosen to conduct a critique of Habermas's theory of communicative action from a perspective informed for the most part by postmodern/poststructural feminism. I hope that my reasons for working within such a framework will become evident in the following chapters but, in my view, a postmodern/poststructural feminist perspective sharpens the critique of Habermas's theory precisely because it stands in such contrast to it. For the purposes of this thesis, my critique will focus upon Habermas's most recent work - The Theory of Communicative Action, Volume I: Reason and the Rationalization of Society (1984), and Volume II: The Critique of Functionalist Reason (1987). Other works by Habermas will not be specifically addressed although references will be made to them as necessary to clarify his positions on various issues.
Orca – Orcinus orca (Linnaeus, 1758)
Creators: name: Suárez-Esteban, Alberto
name: Miján, Ismael
name: Salvador Milla, Alfredo
Publisher: name: Salvador Milla, Alfredo
Year: 2017

description: Mamíferos - Orden Cetacea - Familia Delphinidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/. Versiones anteriores: 20-06-2011
description: A comprehensive review of the natural history of the Killer Whale Orcinus orca in Spain.
Optical super-resolution sensing of a trapped ion's wave packet size
Creators: name: Drechsler, Martin
name: Wolf, Sebastian
name: Schmiegelow, Christian T.
name: Schmidt-Kaler, Ferdinand
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We demonstrate super-resolution optical sensing of the size of the wave packet of a single trapped ion. Our method extends the well known ground state depletion (GSD) technique to the coherent regime. Here, we use a hollow beam to strongly saturate a coherently driven dipole-forbidden transition around a sub-diffraction limited area at its center and observe state dependent fluorescence. By spatially scanning this laser beam over a single trapped $^{40}\mathrm{Ca}^+$ ion, we are able to measure the wave packet sizes of cooled ions. Using a depletion beam waist of $4.2(1)\,μ$m we reach a spatial resolution which allows us to determine a wave packet size of $39(9)\,$nm for a near ground state cooled ion. This value matches an independently deduced value of $32(2)\,$nm, calculated from resolved sideband spectroscopy measurements. Finally, we discuss the ultimate resolution limits of our adapted GSD imaging technique in view of applications to direct quantum wave packet imaging.
description: 5 pages, 3 figures plus supplemental material
Seoul National University Bright Quasar Survey in Optical (SNUQSO) I: First Phase Observations and Results
Creators: name: Lee, Induk
name: Im, Myungshin
name: Kim, Minjin
name: Kang, Eugene
name: Shim, Hyunjin
name: Richards, Gordon T.
name: Edge, Alastair C.
name: Lee, Myung Gyoon
name: Park, Changbom
name: Park, Myeong-Gu
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results from the first phase of the Seoul National University Bright Quasar Survey in Optical (SNUQSO) as well as its basic observational setup. Previous and current large-area surveys have been successful in identifying many quasars, but they could have missed bright quasars due to their survey design. In order to help complete the census of bright quasars, we have performed spectroscopic observations of new bright quasar candidates selected from various methods based on optical colors, near-infrared colors, radio, and X-ray data. In 2005/2006, we observed 55 bright quasar candidates using the Bohyunsan Optical Echelle Spectrograph (BOES) on the 1.8 m telescope at the Bohyunsan Optical Astronomy Observatory in Korea. We identify 14 quasars/Seyferts from our observation, including an optically bright quasar with i=14.98 mag at z=0.092 (SDSS J003236.59-091026.2). Non-quasar/Seyfert objects are found to be mostly stars, among which there are five M-type stars and one cataclysmic variable. Our result shows that there still exist bright quasars to be discovered. However, at the same time, we conclude that finding new bright quasars in high Galactic latitude regions is very challenging and that the existing compilation of optically bright quasars is nearly complete in the northern hemisphere.
description: 29 pages, 5 figures, 5 tables
Gobio - Gobio lozanoi Doadrio y Madeira, 2004
Creators: name: Amat Trigo, Fátima
name: Salvador Milla, Alfredo
Publisher: name: Salvador Milla, Alfredo
Year: 2017

description: Peces - Orden Cypriniformes - Familia Cyprinidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/. Versiones anteriores: 2-02-2015
description: A comprehensive review of the natural history of the Pyrenean Gudgeon Gobio lozanoi in Spain.
Intergalactic CIV absorption at redshifts 5.4 to 6
Creators: name: Ryan-Weber, Emma V.
name: Pettini, Max
name: Madau, Piero
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a strong CIV 1548,1550 absorption system at z_abs = 5.7238 in the near-infrared spectrum (J-band) of the z_em = 6.28 QSO SDSS J1030+0524. These observations, obtained with the Infrared Spectrometer And Array Camera (ISAAC) on the European Southern Observatory Very Large Telescope (ESO VLT), demonstrate that, with modern instrumentation, QSO absorption line spectroscopy can be successfully extended to near-infrared wavelengths to probe the intergalactic medium near the end of the reionization epoch. Although the statistics of this pilot study are limited, the mass density of triply ionized carbon implied by our data is comparable to the values of Omega_CIV reported at lower redshifts. Neither the column density distribution of CIV absorbers nor its integral show significant redshift evolution over a period of time which stretches from 1 to 4.5 Gyr after the big bang, suggesting that a large fraction of intergalactic metals may already have been in place at redshifts above 6. Alternatively, the strong CIV system we have detected may be associated with outflowing, highly-ionized, gas from a foreground massive galaxy; deep imaging and spectroscopy of galaxies near the QSO sightline should be able to distinguish between these two possibilities.
description: 6 pages, 2 figures, accepted for publication in MNRAS on June 28th
Galápago leproso – Mauremys leprosa (Schweigger, 1812)
Creators: name: Díaz-Paniagua, Carmen
name: Andreu, Ana C.
name: Keller, Claudia
Publisher: name: Salvador Milla, Alfredo
Year: 2015
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Reptiles - Orden Quelonios - Familia Geoemydidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
description: A comprehensive review of the natural history of the Mediterranean stripe-necked terrapin Mauremys leprosa in Spain.
On the Relation between Mass and Charge: A Pure Geometric Approach
Creators: name: Wanas, M. I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A new solution of the field equations of the generalized field theory, constructed by Mikhail and Wanas in 1977, has been obtained. The geometric structure used, in the present application, is an absolute parallelism (AP)-space with spherical symmetry (type FIGI). The solution obtained represents a generalized field outside a charged massive central body. Two schemes have been used to get the physical meaning of the solution: The first is related to the metric of the Riemannian space associated with the AP-structure. The second is connected to a covariant scheme known as {\it{Type Analysis}}. It is shown that the dependence on both schemes for interpreting the results obtained, is more better than the dependence on the metric of the Riemannian space associated with the AP-structure. In General, if we consider the solution obtained as representing a geometric model for an elementary charged particle, then the results of the present work can be summarized in the following points. (i) It is shown that the mass of the particle is made of two contributions: The first is the gravitational contribution, and the second is the contribution due to the existence of charge. (ii) The model allows for the existence of a charged particle whose mass is completely electromagnetic in origin. (iii) The model prevents the existence of a charged massless particle. (iv) The electromagnetic contribution, to the mass, is independent of the sign of the electric charge. (v) It is shown that the mass of the electron (or a positron) is purely made of its charge.
description: 15 pages, LaTeX file
Let's Ask Students About Their Programs, Automatically
Creators: name: Lehtinen, Teemu
name: Santos, André L.
name: Sorva, Juha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Students sometimes produce code that works but that its author does not comprehend. For example, a student may apply a poorly-understood code template, stumble upon a working solution through trial and error, or plagiarize. Similarly, passing an automated functional assessment does not guarantee that the student understands their code. One way to tackle these issues is to probe students' comprehension by asking them questions about their own programs. We propose an approach to automatically generate questions about student-written program code. We moreover propose a use case for such questions in the context of automatic assessment systems: after a student's program passes unit tests, the system poses questions to the student about the code. We suggest that these questions can enhance assessment systems, deepen student learning by acting as self-explanation prompts, and provide a window into students' program comprehension. This discussion paper sets an agenda for future technical development and empirical research on the topic.
The EFT stringy viewpoint on large distances
Creators: name: Lanza, Stefano
name: Marchesano, Fernando
name: Martucci, Luca
name: Valenzuela, Irene
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We observe a direct relation between the existence of fundamental axionic strings, dubbed EFT strings, and infinite distance limits in 4d $\mathcal{N}=1$ EFTs coupled to gravity. The backreaction of EFT strings can be interpreted as RG flow of their couplings, and allows one to probe different regimes within the field space of the theory. We propose that any 4d EFT infinite distance limit can be realised as an EFT string flow. We show that along such limits the EFT string becomes asymptotically tensionless, and so the EFT eventually breaks down. This provides an upper bound for the maximal field range of an EFT with a finite cut-off, and reproduces the Swampland Distance Conjecture from a bottom-up perspective. Even if there are typically other towers of particles becoming light, we propose that the mass of the leading tower scales as $m^2\sim \mathcal{T}^w$ in Planck units, with $\mathcal{T}$ the EFT string tension and $w$ a positive integer. Our results hold even in the presence of a non-trivial potential, as long as its energy scale remains well below the cut-off. We check both proposals for large classes of 4d $\mathcal{N}=1$ string compactifications, finding that only the values $w=1,2,3$ are realised.
description: 72 pages + appendices, 6 figures; v3: typos corrected
Azor común – Accipiter gentilis (Linnaeus, 1758)
Creators: name: Zuberogoitia, Íñigo
name: Martínez, José Enrique
Publisher: name: Salvador Milla, Alfredo
Year: 2015
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Aves - Orden Falconiformes - Familia Accipitridae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
description: A comprehensive review of the natural history of the Northern Goshawk Accipiter gentilis in Spain.
A Fokker-Planck Approach for Modeling the Stochastic Phenomena in Magnetic and Resistive Random Access Memory Devices
Creators: name: Das, Debasis
name: Fong, Xuanyao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Embedded non-volatile memory technologies such as resistive random access memory (RRAM) and spin-transfer torque magnetic RAM (STT MRAM) are increasingly being researched for application in neuromorphic computing and hardware accelerators for AI. However, the stochastic write processes in these memory technologies affect their yield and need to be studied alongside process variations, which drastically increase the complexity of yield analysis using the Monte Carlo approach. Therefore, we propose an approach based on the Fokker-Planck equation for modeling the stochastic write processes in STT MRAM and RRAM devices. Moreover, we show that our proposed approach can reproduce the experimental results for both STT-MRAM and RRAM devices.
The effect of the noncentral impurity-matrix interaction upon the thermal expansion and polyamorphism of solid CO-C60 solutions at low temperatures
Creators: name: Dolbin, A. V.
name: Esel'son, V. B.
name: Gavrilko, V. G.
name: Manzhelii, V. G.
name: Vinnikov, N. A.
name: Gadd, G. E.
name: Moricca, S.
name: Cassidy, D.
name: Sundqvist, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Orientational glasses with CO molecules occupying 26% and 90% of the octahedral interstitial sites in the C60 lattice have been investigated by the dilatometric method in a temperature interval of 2.5 - 23 K. At temperatures 4 - 6 K the glasses undergo a first-order phase transition which is evident from the hysteresis of the thermal expansion and the maxima in the temperature dependences of the linear thermal expansion coefficients, and the thermalization times of the samples. The effect of the noncentral CO-C60 interaction upon the thermal expansion and the phase transition in these glasses was clarified by comparing the behavior of the properties of the CO-C60 and N2-C60 solutions.
description: 11 pages, 7 figures
title: Active Passivity?: Spinoza in Pasolini’s Porcile
title: Spinoza in Pasolini’s Porcile
titleType: Subtitle
Creators: name: Gragnolati, Manuele
name: Holzhey, Christoph F. E.
Publisher: name: world picture
Year: 2015
Subjects: Pasolini, Piero Paolo
active passivity
Porcile (film)
Spinoza, Baruch

description: Pier Paolo Pasolini’s Porcile (Pigsty) was shown at the Venice Film Festival in 1969 and was harshly criticized for its scandalous and desecrating character. It is indeed a provocative and bleak film, which offers a scathing political critique of ongoing fascism but without seeming to allow for any space for intervention or change. With Porcile, Pasolini continues to distance himself from Marxist engagement and revolutionary politics, and while he characterizes its politics in terms of an ‘apocalyptic anarchy’ that can only be approached with distance and humour, our suggestion is that Porcile proposes abandoning (political) activity and hope for a better future as a paradoxical form of both radical political critique and joy.
description: world picture, 10
description: Manuele Gragnolati and Christoph F. E. Holzhey, ‘Active Passivity?: Spinoza in Pasolini’s /Porcile/’, /world picture/, 10 (2015) >
Canoe Race Applicants Contact List, 1985
Creators: name: Springs Historical Society/Library
Publisher: name: Unknown
Year: 1985
Subjects: Springs
East Hampton
Maps
Canoes
Regattas

description: This list shows the applicant contacts for the Canoe Race held by Springs Historical Society/Library.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
Loss Mechanism Analyses of Perovskite Solar Cells with an Equivalent Circuit Model
Creators: name: Xu, Ting
name: Wang, Zi-Shuai
name: Li, Xuan-Hua
name: Sha, Wei E. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Understanding and quantifying the main loss factors affecting the power conversion efficiency of perovskite solar cells are urgently needed. In this work, based on semiconductor physics, the expressions of bulk and surface recombination currents are analytically derived. Then taking the optical loss, series and shunt resistance losses, and bulk and surface recombination losses into consideration, an equivalent circuit model is proposed to describe the current density-voltage characteristics of practical perovskite solar cells. Furthermore, by comparing to the drift-diffusion model, the pre-defined physical parameters of the drift-diffusion model well agree with the fitting parameters retrieved by the equivalent circuit model, which verifies the reliability of the proposed model. Moreover, when the circuit model is applied to analyze experimental results, the fitting outcomes show favorable consistency to the physical investigations offered by the experiments. And the relative fitting errors of the above cases are all less than 2%. Through employing the model, the dominant recombination type is clearly identified and split current density-voltage curves characterizing different loss mechanisms are offered, which intuitively reveals the physical principles of efficiency loss. Additionally, through calculating the efficiency loss ratios under the open-circuit voltage condition, quantifying the above-mentioned loss mechanisms becomes simple and compelling. Consequently, this model offers a guideline to approach the efficiency limit from a circuit-level perspective. And the model is a comprehensive simulation and analysis tool for understanding the device physics of perovskite solar cells.
description: 17 pages, 7 figures
Snapping Supernovae at z>1.7
Creators: name: Aldering, Greg
name: Kim, Alex G.
name: Kowalski, Marek
name: Linder, Eric V.
name: Perlmutter, Saul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We examine the utility of very high redshift Type Ia supernovae for cosmology and systematic uncertainty control. Next generation space surveys such as the Supernova/Acceleration Probe (SNAP) will obtain thousands of supernovae at z>1.7, beyond the design redshift for which the supernovae will be exquisitely characterized. We find that any z\gtrsim2 standard candles' use for cosmological parameter estimation is quite modest and subject to pitfalls; we examine gravitational lensing, redshift calibration, and contamination effects in some detail. The very high redshift supernovae - both thermonuclear and core collapse - will provide copious interesting information on star formation, environment, and evolution. However, the new observational systematics that must be faced, as well as the limited expansion of SN-parameter space afforded, does not point to high value for 1.7
description: 30 pages, 8 figures
Desafios organizacionais na gestão do Instituto Federal Baiano - Campus Bom Jesus da Lapa (BA)
Creators: name: Cardoso, Diele dos Santos
name: Mota Júnior, Antônio de Macêdo
Publisher: name: figshare
Year: 2021
Subjects: subject: 130304 Educational Administration, Management and Leadership
subject: FOS: Educational sciences

description: Este estudo exploratório é uma pesquisa em andamento do Mestrado Profissional em Gestão e Tecnologias Aplicadas à Educação (GESTEC) da Universidade do Estado da Bahia (UNEB), que aborda os desafios da gestão educacional, com foco na organização das Comissões e Grupos de Trabalho do Instituto Federal Baiano (IF Baiano), campus Bom Jesus da Lapa (BA), com o objetivo de propor novas tecnologias para a melhoria dos resultados e alcance dos objetivos institucionais. Apresenta o enfoque multidimensional da gestão educacional. Destaca a importância do planejamento e da participação de Comissões e Grupos de Trabalho na execução das ações planejadas, bem como sinaliza a necessidade da utilização de tecnologias de informação e comunicação como ferramentas que possam viabilizar a realização das atividades desempenhadas por esses grupos e comissões.
Modeling particle-fluid interaction in a coupled CFD-DEM framework
Creators: name: Fonceca, Ilberto
name: Maza, Diego
name: Hidalgo, Raúl Cruz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this work, we present an alternative methodology to solve the particle-fluid interaction in the resolved CFDEM coupling framework. This numerical approach consists of coupling a Discrete Element Method (DEM) with a Computational Fluid Dynamics (CFD) scheme, solving the motion of immersed particles in a fluid phase. As a novelty, our approach explicitly accounts for the body force acting on the fluid phase when computing the local momentum balance equations. Accordingly, we implement a fluid-particle interaction computing the buoyant and drag forces as a function of local shear strain and pressure gradient. As a benchmark, we study the Stokesian limit of a single particle. The validation is performed comparing our outcomes with the ones provided by a previous resolved methodology and the analytical prediction. In general, we find that the new implementation reproduces with very good accuracy the Stokesian dynamics. Complementarily, we study the settling terminal velocity of a sphere under confined conditions.
Fiber-optic realization of anisotropic depolarizing quantum channels
Creators: name: Karpinski, Michal
name: Radzewicz, Czeslaw
name: Banaszek, Konrad
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We employed an electrically-driven polarization controller to implement anisotropic depolarizing quantum channels for the polarization state of single photons. The channels were characterized by means of ancilla-assisted quantum process tomography using polarization-entangled photons generated in the process of spontaneous parametric down-conversion. The demonstrated depolarization method offers good repeatability, low cost, and compatibility with fiber-optic setups. It does not perturb the modal structure of single photons, and therefore can be used to verify experimentally protocols for managing decoherence effects based on multiphoton interference.
description: 7 pages, 6 figures
Schwarzschild limit of conformal gravity in the presence of macroscopic scalar fields
Creators: name: Mannheim, Philip D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In their original study of conformal gravity, a candidate alternate gravitational theory, Mannheim and Kazanas showed that in any empty vacuum region exterior to a localized static spherically symmetric gravitational source, the geometry would reduce to the standard attractive gravity Schwarzschild geometry on solar system distance scales. In a recent paper Flanagan has argued that this would not be the case if the source has associated with it a macroscopic scalar field which makes a non-zero contribution to the energy-momentum tensor in the otherwise empty exterior region. In this paper we examine Flanagan's analysis and show that even with such long range scalar fields, the standard Schwarzschild phenomenology is still recovered.
description: 32 pages, revtex
Localization properties in Lieb lattices and their extensions
Creators: name: Liu, Jie
name: Mao, Xiaoyu
name: Zhong, Jianxin
name: Römer, Rudolf A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We study the localization properties of generalized, two- and three-dimensional Lieb lattices, $\mathcal{L}_2(n)$ and $\mathcal{L}_3(n)$, $n= 1, 2, 3$ and $4$, at energies corresponding to flat and dispersive bands using the transfer matrix method (TMM) and finite size scaling (FSS). We find that the scaling properties of the flat bands are different from scaling in dispersive bands for all $\mathcal{L}_d(n)$. For the $d=3$ dimensional case, states are extended for disorders $W$ down to $W=0.01 t$ at the flat bands, indicating that the disorder can lift the degeneracy of the flat bands quickly. The phase diagram with periodic boundary condition for $\mathcal{L}_3(1)$ looks similar to the one for hard boundaries. We present the critical disorder $W_c$ at energy $E=0$ and find a decreasing $W_c$ for increasing $n$ for $\mathcal{L}_3(n)$, up to $n=3$. Last, we show a table of FSS parameters including so-called irrelevant variables; but the results indicate that the accuracy is too low to determine these reliably. \end{abstract}
Barbo mediterráneo – Luciobarbus guiraonis (Steindachner, 1866)
Creators: name: Salvador Milla, Alfredo
Publisher: name: Salvador Milla, Alfredo
Year: 2017
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Peces - Orden Cypriniformes - Familia Cyprinidaeen la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/. Versiones anteriores: 11-02-2016
description: A comprehensive review of the natural history of the Mediterranean Barbel Luciobarbus guiraonis in Spain.
Information Complexity and Generalization Bounds
Creators: name: Banerjee, Pradeep Kr.
name: Montúfar, Guido
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: I.2.6; G.3
subject: 68Q32, 68T05, 94A15

description: We present a unifying picture of PAC-Bayesian and mutual information-based upper bounds on the generalization error of randomized learning algorithms. As we show, Tong Zhang's information exponential inequality (IEI) gives a general recipe for constructing bounds of both flavors. We show that several important results in the literature can be obtained as simple corollaries of the IEI under different assumptions on the loss function. Moreover, we obtain new bounds for data-dependent priors and unbounded loss functions. Optimizing the bounds gives rise to variants of the Gibbs algorithm, for which we discuss two practical examples for learning with neural networks, namely, Entropy- and PAC-Bayes- SGD. Further, we use an Occam's factor argument to show a PAC-Bayesian bound that incorporates second-order curvature information of the training loss.
description: To appear in 2021 IEEE International Symposium on Information Theory (ISIT); 23 pages
Chotacabras cuellirrojo – Caprimulgus ruficollis Temminck, 1820
Creators: name: Sáez, Pedro
name: Camacho, Carlos
Publisher: name: Salvador Milla, Alfredo
Year: 2016
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Aves - Orden Caprimulgiformes - Familia Caprimulgidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
description: A comprehensive review of the natural history of the Red-necked Nightjar in Spain.
Who Is Eating the Outflow?: High-Angular Resolution Study of an Intermediate-Mass Protostar in L1206
Creators: name: Beltran, Maria T.
name: Girart, Josep M.
name: Estalella, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Up to now only a few intermediate-mass molecular outflows have been studied with enough high-angular resolution. The aim of this work is to study in detail the intermediate-mass YSO IRAS 22272+6358A, which is embedded in L1206, and its molecular outflow, in order to investigate the interaction of the outflow with the dense protostellar material, and to compare their properties with those of lower mas counterparts. We carried out OVRO observations of the 2.7 mm continuum emission, CO(1-0), C18O(1-0), and HC3N(12-11) in order to map with high-angular resolution the core of L1206, and to derive the properties of the dust emission, the molecular outflow and the dense protostellar envelope. The 2.7 mm continuum emission has been resolved into four sources, labeled OVRO~1, 2, 3, and 4. The intermediate-mass Class~0/I object OVRO 2, with a mass traced by the dust emission of 14.2 Msun, is the source associated with IRAS 22272+6358A. The CO(1-0) observations have revealed a very collimated outflow driven by OVRO 2, at a PA ~140 degr, that has a very weak southeastern red lobe and a much stronger northwestern blue lobe. Photodissociation toward the red lobe produced by the ionization front coming from the bright-rimmed diffuse HII region could be responsible of the morphology of the outflow. The spatial correlation between the outflow and the elongated dense protostellar material traced by HC3N(12-11) suggests an interaction between the molecular outflow and the protostellar envelope. Shocks produced by the molecular outflow, and possibly by the shock front preceding the ionization front could account for the southern enhancement of HC3N. The properties of the intermediate-mass protostar OVRO 2 and the molecular outflow are consistent with those of lower mass counterparts.
description: 14 pages, 12 figures, 5 tables. Accepted for publication by A&A
Explaining $(g-2)_μ$ with Multi-TeV Sleptons
Creators: name: Altmannshofer, Wolfgang
name: Gadam, Sri Aditya
name: Gori, Stefania
name: Hamer, Nick
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a supersymmetric extension of the Standard Model in which the new physics contributions to the anomalous magnetic moment of the muon can be more than an order of magnitude larger than in the minimal supersymmetric Standard Model. The extended electroweak symmetry breaking sector of the model can consistently accommodate Higgs bosons and Higgsinos with $O(1)$ couplings to muons. We find that sleptons with masses in the multi-TeV range can comfortably explain the recently confirmed discrepancy in the anomalous magnetic moment of the muon. We discuss additional phenomenological aspects of the model, including its effects on tau flavor changing decays.
description: 19 pages, 2 figures. v2: made consistent with published article
Rent control and rent decontrol in British Columbia : a case study of the Vancouver rental market, 1974 to 1989
Creators: name: Lazzarin, Celia C.
Publisher: name: University of British Columbia
Year: 2010

description: This study examines the impact of rent control and rent decontrol on the rental sector. The city of Vancouver is used as an empirical case study to determine the accuracy of the assertions and predictions made by rent control opponents about the nature of the impact of British Columbia's rent control policy. The study begins with a review of the rent control literature in order to identify the theories presented by rent control opponents and supporters. The study then reviews the political debate over rent control and decontrol. A chronological summary of British Columbia's rent regulation system follows which illustrates the action taken by the politicians. Finally, the assertions and predictions made by rent control opponents about the impact of rent control are assessed by comparing them with the practical experience of Vancouver's rental market from 1974 to 1989. Rent regulations were in effect in British Columbia from 1974 to 1984. This study focuses on three particular stages during the period rents were regulated: a) the introduction of rent control from 1974 to 1975 by the New Democratic government; b) the beginning of rent decontrol from 1977 to 1978 by the Social Credit government; and c) the elimination of rent control and rent review from 1983 to 1984, also by the Social Credit government. Rent control opponents argue that rent control causes the following detrimental effects: a) decreases rental construction; b) reduces building maintenance; c) increases conversions from rental units to condominiums; d) increases demolition of rental buildings; e) creates excessive demand for rental housing; and f) reduces the municipal tax base. The most important finding is that there is no discernable relationship between the nature of the regulatory framework and the level of rental construction, rental conversions to condominiums, and demolition of rental stock. The study concludes that it is much too simple to blame one government policy-rent control—for the problems of the urban rental sector. It is clear that the problems are deep-rooted and that a combination of many macro-economic factors such as high and unstable inflation and interest rates, and the general economic climate can have a greater impact than the regulatory framework on the rental sector. In addition, demographic factors such as provincial rates of migration can have a very significant impact on demand in the rental sector. More empirical studies are needed to build on this study to better assess the impact of rent control on Vancouver and other cites in British Columbia. Research is also needed to assess the accuracy of the claims made by rent control supporters in order to determine whether they comprise valid criteria upon which to formulate rental policy.
Cacho malagueño – Squalius malacitanus Doadrio y Carmona, 2006
Creators: name: Salvador Milla, Alfredo
Publisher: name: Salvador Milla, Alfredo
Year: 2016
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Aves - Orden Cypriniformes - Familia Cyprinidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
description: A comprehensive review of the natural history of the Málaga Chub Squalius malacitanus in Spain.
Long-term multi-wavelength variations of Fermi blazar 3C 279
Creators: name: Zhang, Bing-Kai
name: Jin, Min
name: Zhao, Xiao-Yun
name: Zhang, Li
name: Dai, Ben-Zhong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The long-term optical, X-ray and $γ$-ray data of blazar 3C 279 have been compiled from $Swift$-XRT, $RXTE$ PCA, $Fermi$-LAT, SMARTS and literature. The source exhibits strong variability on long time scales. Since 1980s to now, the optical $R$ band light curve spans above 32 yr, and a possible 5.6-yr-long quasi-periodic variation component has been found in it. The optical spectral behavior has been investigated. In the optical band, the mean spectral index is -1.71. The source exhibits an obvious special spectral behavior. In the low state, the source shows a clear bluer-when-brighter behavior in a sense that the optical spectrum turns harder (flatter) when the brightness increases. While in the high state, the optical spectrum is stable, that means the source spectral index does not vary with the brightness. The correlation analysis has been performed among optical, X-ray and $γ$-ray energy bands. The result indicates that the variations of $γ$-ray and X-ray bands are well correlated without time delay on the time scale of days, and their variations exhibit weak correlations with those of optical band. The variations, especial outbursts, are simultaneous, but the magnitude of variations is disproportionate. The detailed analysis reveals that the main outbursts exhibit strong correlations in different $γ$-ray, X-ray and optical bands.
description: 17 pages, 13 figures. Accepted by Research in Astron. Astrophys.(RAA)
Lagartija lusitana – Podarcis guadarramae (Boscá, 1916)
Creators: name: Carretero, Miguel Ángel
name: Galán, Pedro
name: Salvador Milla, Alfredo
Publisher: name: Salvador Milla, Alfredo
Year: 2015
Subjects: subject: Description
subject: Size
subject: Variation
subject: Distribution
subject: Habitat
subject: Abundance
subject: Status
subject: Threats
subject: Diet
subject: Reproduction
subject: FOS: Medical biotechnology
subject: Demography
subject: FOS: Sociology
subject: Interactions
subject: Predators
subject: Parasites
subject: Pathogens
subject: Activity
subject: Home range
subject: Bibliography

description: Reptiles - Orden Squamata - Familia Lacertidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/.
description: A comprehensive review of the natural history of the Lusitanian Wall Lizard Podarcis guadarramae in Spain.
Gravitational induction
Creators: name: Bini, Donato
name: Cherubini, Christian
name: Chicone, Carmen
name: Mashhoon, Bahram
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the linear post-Newtonian approximation to general relativity known as gravitoelectromagnetism (GEM); in particular, we examine the similarities and differences between GEM and electrodynamics. Notwithstanding some significant differences between them, we find that a special nonstationary metric in GEM can be employed to show {\it explicitly} that it is possible to introduce gravitational induction within GEM in close analogy with Faraday's law of induction and Lenz's law in electrodynamics. Some of the physical implications of gravitational induction are briefly discussed.
description: Slightly expanded version
title: Semigroup congruences : computational techniques and theoretical applications
Creators: name: Torpey, Michael
Publisher: name: University of St Andrews
Year: 2019

description: Computational semigroup theory is an area of research that is subject to growing interest. The development of semigroup algorithms allows for new theoretical results to be discovered, which in turn informs the creation of yet more algorithms. Groups have benefitted from this cycle since before the invention of electronic computers, and the popularity of computational group theory has resulted in a rich and detailed literature. Computational semigroup theory is a less developed field, but recent work has resulted in a variety of algorithms, and some important pieces of software such as the Semigroups package for GAP. Congruences are an important part of semigroup theory. A semigroup’s congruences determine its homomorphic images in a manner analogous to a group’s normal subgroups. Prior to the work described here, there existed few practical algorithms for computing with semigroup congruences. However, a number of results about alternative representations for congruences, as well as existing algorithms that can be borrowed from group theory, make congruences a fertile area for improvement. In this thesis, we first consider computational techniques that can be applied to the study of congruences, and then present some results that have been produced or precipitated by applying these techniques to interesting examples. After some preliminary theory, we present a new parallel approach to computing with congruences specified by generating pairs. We then consider alternative ways of representing a congruence, using intermediate objects such as linked triples. We also present an algorithm for computing the entire congruence lattice of a finite semigroup. In the second part of the thesis, we classify the congruences of several monoids of bipartitions, as well as the principal factors of several monoids of partial transformations. Finally, we consider how many congruences a finite semigroup can have, and examine those on semigroups with up to seven elements.
Survey of Community Detection Algorithms to Identify the Best Community in Real-Time Networks
Creators: name: Sudhakaran, Dhanya
name: Renjith, Shini
Publisher: name: figshare
Year: 2021
Subjects: subject: 80704 Information Retrieval and Web Search
subject: FOS: Media and communications
subject: 80607 Information Engineering and Theory
subject: FOS: Computer and information sciences
subject: 80611 Information Systems Theory

description: Community detection is a common problem in graph data analytics. It consists of finding groups of densely connected nodes with few connections to nodes outside of the group. In particular, identifying communities in large-scale networks is an important task in many scientific domains. Community detection algorithms are used to study the structural properties of real-world networks. In this review, we evaluated some of the traditional algorithms for overlapping and disjoint community detection on large-scale real-world networks to identify the best community in real- time networks.