cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The One-Loop Effective Potential in Non-Linear Gauges
Creators: name: Alexander, Lisa P.
name: Pilaftsis, Apostolos
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the 1-loop effective potential of an Abelian Higgs model within the R_{ξ/σ} class of non-linear gauges that preserves the Higgs-boson low-energy theorem. The R_{ξ/σ} gauge involves two gauge-fixing parameters ξand σ, and is a renormalizable extension of the Feynman--'t Hooft R_ξset of gauges beyond the 1-loop level. By taking consistently into account Goldstone--gauge-boson mixing effects, we show how the 1-loop effective potential evaluated at its extrema is independent of both ξand σ, in agreement with the Nielsen identity. The 1-loop constant and wavefunction renormalizations are presented within this non-linear R_{ξ/σ} class of gauges.
description: 15 pages, LaTeX, 1 figure, references added
Eco-friendly synthesis, structural insights, and antimicrobial potential of 1,3,5-tri-N-substituted hexahydro-1,3,5-triazine derivatives
Creators: name: Kumawat, Jyoti
name: Jain, Sonika
name: Misra, Namita
name: Jain, Pankaj
name: Kishore, Dharma
name: Patel, Saraswati
Publisher: name: Taylor & Francis
Year: 2025
Subjects: subject: Biophysics
subject: Biochemistry
subject: Pharmacology
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Information Systems not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: A rapid, one-pot synthesis approach was employed to develop a series of 1,3,5-tri-N-substituted hexahydro-1,3,5-triazine derivatives, followed by a comprehensive evaluation of their antimicrobial potential. Among the synthesized compounds, derivative 3h demonstrated remarkable antibacterial and antifungal activity, exhibiting IC50 values of 42.33 ± 0.23 μg/mL and 40.52 ± 0.31 μg/mL against Pseudomonas chlororaphis and Malassezia furfur, respectively. Density functional theory (DFT) calculations further provided insights into the electronic structure and stability of the most potent compound. Molecular docking studies revealed strong binding affinities of compound 3h with DNA gyrase (E. coli,-11.07 kcal/mol) and lanosterol 14α-demethylase (Saccharomyces cerevisiae, -13.45 kcal/mol), suggesting its potential mechanism of antimicrobial action. These findings highlight the promise of triazine derivatives as effective antimicrobial agents with computationally validated binding interactions.
First-principles calculation of DNA looping in tethered particle experiments
Creators: name: Towles, Kevin B.
name: Beausang, John F.
name: Garcia, Hernan G.
name: Phillips, Rob
name: Nelson, Philip C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biomolecules (q-bio.BM)
subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: We calculate the probability of DNA loop formation mediated by regulatory proteins such as Lac repressor (LacI), using a mathematical model of DNA elasticity. Our model is adapted to calculating quantities directly observable in Tethered Particle Motion (TPM) experiments, and it accounts for all the entropic forces present in such experiments. Our model has no free parameters; it characterizes DNA elasticity using information obtained in other kinds of experiments. [...] We show how to compute both the "looping J factor" (or equivalently, the looping free energy) for various DNA construct geometries and LacI concentrations, as well as the detailed probability density function of bead excursions. We also show how to extract the same quantities from recent experimental data on tethered particle motion, and then compare to our model's predictions. [...] Our model successfully reproduces the detailed distributions of bead excursion, including their surprising three-peak structure, without any fit parameters and without invoking any alternative conformation of the LacI tetramer. Indeed, the model qualitatively reproduces the observed dependence of these distributions on tether length (e.g., phasing) and on LacI concentration (titration). However, for short DNA loops (around 95 basepairs) the experiments show more looping than is predicted by the harmonic-elasticity model, echoing other recent experimental results. Because the experiments we study are done in vitro, this anomalously high looping cannot be rationalized as resulting from the presence of DNA-bending proteins or other cellular machinery. We also show that it is unlikely to be the result of a hypothetical "open" conformation of the LacI tetramer.
description: See the supplement at http://www.physics.upenn.edu/~pcn/Ms/TowlesEtalSuppl.pdf . This revised version accepted for publication at Physical Biology
Low-cost experiment to measure the speed of light
Creators: name: Mehdi, Faraz
name: Kolwankar, Kiran M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: In this paper, we demonstrate a low-cost method to measure the speed of light. It uses instruments which are readily available in any undergraduate laboratory in a developing country and some components which are inexpensive. The method is direct as it measures the time of flight of the LASER beam and easy to implement. It will allow students to verify the finite value of the speed of light first hand. It can be part of the undergraduate syllabus as a regular experiment or a demonstration experiment.
description: 4 pages, 5 figures
On "Regular Landsberg metrics are always Berwald" by Z. I. Szabo
Creators: name: Matveev, Vladimir S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53B40

description: A gap in the proof of the finsler "unicorn" conjecture in the paper "Regular Landsberg metrics are always Berwald" by Z. I. Szabo is pointed out
description: 3 pages, no figures
On the study of force-balance percolation
Creators: name: Jeng, M.
name: Schwarz, J. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study models of correlated percolation where there are constraints on the occupation of sites that mimic force-balance, i.e. for a site to be stable requires occupied neighboring sites in all four compass directions in two dimensions. We prove rigorously that $p_c<1$ for the two-dimensional models studied. Numerical data indicate that the force-balance percolation transition is discontinuous with a growing crossover length, with perhaps the same form as the jamming percolation models, suggesting the same underlying mechanism driving the transition in both cases. In other words, force-balance percolation and jamming percolation may indeed belong to the same universality class. We find a lower bound for the correlation length in the connected phase and that the correlation function does not appear to be a power law at the transition. Finally, we study the dynamics of the culling procedure invoked to obtain the force-balance configurations and find a dynamical exponent similar to that found in sandpile models.
description: 15 pages, 32 figures
SU(2,1) / (SU(2) x U(1)) B-L Higgs Inflation
Creators: name: Pallis, C
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a realization of Higgs inflation within Supergravity which is largely tied to the existence of a pole of order two in the kinetic term of the inflaton field. This pole arises due to the selected Kaehler potential which parameterizes the SU(2,1) / (SU(2) x U(1)) manifold with scalar curvature R_{21}=-6/N. The associated superpotential includes, in addition to the Higgs superfields, a stabilizer superfield, respects a B-L gauge and an R symmetries and contains the first allowed nonrenormalizable term. If the coefficient of this term is almost equal to that of the others within about 10^-5 and N=2, the inflationary observables can be done compatible with the present data. The tuning can be eluded if we modify the Kaehler potential associated with the manifold above. In this case, inflation can be realized with just renormalizable superpotential terms and results to higher tensor-to-scalar ratios as N approaches its maximum at N~80.
description: Prepared for the Proceedings of HEP 2021, Thessaloniki, Greece
Polarization agnostic continuous variable quantum key distribution
Creators: name: Williams, Brian P.
name: Peters, Nicholas A.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a polarization agnostic method for Gaussian-modulated coherent state (GCMS) continuous-variable quantum key distribution (CVQKD). Due to the random and continuous nature of the GCMS protocol, Alice, the transmitter, can encode two distinct quadratures in each of two orthogonal polarization modes, such that Bob, the receiver, measures valid GCMS quadratures in a single polarization mode even when polarization changes occur during transmission. This method does not require polarization correction in the optical domain, does not require monitoring both polarization modes, reduces loss by eliminating optical components, and avoids the noise injected by polarization correction algorithms.
BOSHLANG'ICH  TA'LIMDAGI  BOLALARDA  ESTETIKANI RIVOJLANTIRISH USULLARI
Creators: name: Muhammadaliyeva, Nodirabegim
Publisher: name: Zenodo
Year: 2023

description: Maqolada estetik tarbiya va uning inson hayotidagi ahamiyati, uning ijtimoiy hayotimizda tutgan o‘rni psixologik va pedagogik tasnifi asosiy tushunchalar berilgan. Boshlang‘ich ta’limdagi bolalarda eestetikni rivojlantirish usullari keltirilgan.
Amplification of Fluctuations in a Spinor Bose Einstein Condensate
Creators: name: Leslie, S. R.
name: Guzman, J.
name: Vengalattore, M.
name: Sau, J. D.
name: Cohen, M. L.
name: Stamper-Kurn, D. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Dynamical instabilities due to spin-mixing collisions in a $^{87}$Rb F=1 spinor Bose-Einstein condensate are used as an amplifier of quantum spin fluctuations. We demonstrate the spectrum of this amplifier to be tunable, in quantitative agreement with mean-field calculations. We quantify the microscopic spin fluctuations of the initially paramagnetic condensate by applying this amplifier and measuring the resulting macroscopic magnetization. The magnitude of these fluctuations is consistent with predictions of a beyond-mean-field theory. The spinor-condensate-based spin amplifier is thus shown to be nearly quantum-limited at a gain as high as 30 dB.
Using optical clock transitions in Cu II and Yb III for time-keeping and search for new physics
Creators: name: Allehabi, Saleh O.
name: Dzuba, V. A.
name: Flambaum, V. V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the $^1$S$_0 - ^3$D$_2$ and $^1$S$_0 - ^3$D$_3$ transitions in Cu II and the $^1$S$_0 - ^3$P$^{\rm o}_2$ transition in Yb III as possible candidates for the optical clock transitions. A recently developed version of the configuration (CI) method, designed for a large number of electrons above closed-shell core, is used to carry out the calculation. We calculate excitation energies, transition rates, lifetimes, scalar static polarizabilities of the ground and clock states, and blackbody radiation shift. We demonstrate that the considered transitions have all features of the clock transition leading to prospects of highly accurate measurements. Search for new physics, such as time variation of the fine structure constant, is also investigated.
description: 9 pages, 2 figures
title: The Impact of the Physical Environment on the Social Integration of Individuals with Disabilities in Community
Creators: name: Christensen, Keith M.
Publisher: name: Utah State University
Year: 2010

description: Social integration in community is especially important for individuals with disabilities well-being. Although individuals with disabilities reside within the community's physical environment, they are often marginalized in the social environment. This may be the result of individuals with disabilities residing in physical environments that negatively affect opportunities for integration in the social environment. However, there has been little investigation to understand the impact of the physical environment on the social integration of individuals with disabilities in community. The purpose of this investigation was to (a) examine the current body of evidence concerning the impact of a community's physical environment on opportunities for social integration, and (b) determine to what extent individuals with disabilities reside in physical environments that contribute to opportunities for social integration in community. To address the first study purpose, a review of the current body of evidence suggests that community environments that are pedestrian-oriented, possess appropriate common spaces, and fewer neighborhood incivilities, are likely to promote social integration. Secondly, two questions were evaluated: (a) to what extent adults with disabilities' places of residence are correlated with mixed-land use community environments, and (b) to what extent adults with disabilities' place of residence are correlated with community common space. Linear regression was used to determine the magnitude of the relationship between Utah's Davis and Weber counties' census block groups' percent of population with disabilities, percent of population below poverty level, land use diversity, and the percent of the area within walking distance of community common space. The most significant association with individuals with disabilities places of residence are socioeconomic. This study indicates that poverty level predicts 30-35% of the variance in individuals with disabilities place of residence. Given, the very modest association with mixed-land use (4%) and common space (2%), poverty level is the most useful predictor of an individual with disabilities place of residence. Future research should explore more appropriate measures of community common space, at the residence and neighborhood level, and the pedestrian-orientation of the community environment. Future research should also explore the strong association between socioeconomic factors and individuals with disabilities places of residence.
Local singlets, frustration, and unconventional superconductivity in the organic charge-transfer solids
Creators: name: Clay, R. T.
name: Mazumdar, S.
name: Li, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We suggest that superconductivity (SC) in the organic charge transfer solids (CTS) is reached from a Bond-Charge Density Wave (BCDW). We discuss an effective model for the BCDW to SC transition, an attractive U extended Hubbard Hamiltonian with repulsive nearest neighbor interaction V. We discuss experimental consequences of the theory for different classes of CTS superconductors as well as related inorganic materials.
description: 4 pages, 2 figures, ECRYS 2008
Deliverable 2.3 Public attitudes to life sciences research in six European countries
Creators: name: Lakomý, Martin
name: Bohlin, Gustav
name: Hlavová, Renata
name: Macháčková, Hana
name: Bergman, Martin
name: Lindholm, Maria
Publisher: name: Zenodo
Year: 2021
Subjects: open science, RRI, life sciences

description: The ORION survey "Public attitudes to life sciences research in six European countries" shows that interest in life sciences research is generally high among citizens and that the three most accepted purposes of using genome editing are related to the medical field. 6000 persons were interviewed in this pan-European study which was led by the ORION partners VA in Sweden and CEITEC in the Czech Republic.
MOJAVE -- XXII. Brightness temperature distributions and geometric profiles along parsec-scale AGN jets
Creators: name: Kravchenko, E. V.
name: Pashchenko, I. N.
name: Homan, D. C.
name: Kovalev, Y. Y.
name: Lister, M. L.
name: Pushkarev, A. B.
name: Ros, E.
name: Savolainen, T.
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Radial gradients of the brightness temperatures along the parsec-scale jets of Active Galactic Nuclei (AGN) can be used to infer the energy balance and to estimate the parameter range of physical conditions in these regions. In this paper, we present a detailed study of the brightness temperature gradients and geometry profiles of relativistic jets of 447 AGN based on 15 GHz Very Long Baseline Array observations performed between 1994 and 2019. We used models of the jet structure using two-dimensional Gaussian components and analysed variations in their brightness temperatures and sizes along the jets. The size of the jet components, R, increases with projected distance from the jet base, r, as $R\propto r^{1.02\pm0.03}$, i.e., typically following a conically expanding streamline and therefore indicating that the size of jet components is a good tracer of jet geometry. The brightness temperature gradients along the jets typically follow a power-law $T_\mathrm{b} \propto r^{-2.82\pm0.07}$. Half of the sample sources show non-monotonic R(r) or Tb(r) profiles and their distributions were characterised by a double power-law model. We found at least six scenarios to explain the enhancement of the brightness temperature by a presence of inhomogeneities (shocks, jet recollimation) or curvature effects (helical structures, helical magnetic field, non-radial motion, bent jets). Our results are consistent with the scenario that the jet features can be simplified as optically thin moving blobs. In the sources demonstrating transition from a conical to parabolic jet shape, the gradient of the Tb(R) changes at the position of the break consistent with the model of magneto-hydrodynamic acceleration.
description: 23 pages, 22 figures, accepted in MNRAS
Reshaped Weyl fermionic dispersions driven by Coulomb interactions in MoTe2
Creators: name: Kang, Seoung-Hun
name: Jeon, Sangjun
name: Kim, Hyun-Jung
name: Ko, Wonhee
name: Cho, Suyeon
name: Kang, Se Hwang
name: Kim, Sung Wng
name: Yang, Heejun
name: Kim, Hyo Won
name: Son, Young-Woo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report the direct evidence of impacts of the Coulomb interaction in a prototypical Weyl semimetal, MoTe2, that alter its bare bands in a wide range of energy and momentum. Our quasiparticle interference patterns measured using scanning tunneling microscopy are shown to match the joint density of states of quasiparticle energy bands including momentum-dependent self-energy corrections, while electronic energy bands based on the other simpler local approximations of the Coulomb interaction fail to explain neither the correct number of quasiparticle pockets nor shape of their dispersions observed in our spectrum. With this, we predict a transition between type-I and type-II Weyl fermions with doping and resolve its disparate quantum oscillation experiments, thus highlighting the critical roles of Coulomb interactions in layered Weyl semimetals.
Tomographic femtosecond X-ray diffractive imaging
Creators: name: Schmidt, K. E.
name: Spence, J. C. H.
name: Weierstall, U.
name: Kirian, R.
name: Wang, X.
name: Starodub, D.
name: Chapman, H. N.
name: Howells, M. R.
name: Doak, R. B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: A method is proposed for obtaining three simultaneous projections of a target from a single radiation pulse, which also allows the relative orientation of successive targets to be determined. The method has application to femtosecond X-ray diffraction, and does not require solution of the phase problem. We show that the principle axes of a compact charge-density distribution can be obtained from projections of its autocorrelation function, which is directly accessible in diffraction experiments. The results may have more general application to time resolved tomographic pump-probe experiments and time-series imaging.
description: 4 pages, 4 figures
The Finite Element Implementation of a K.P.P. Equation for the Simulation of Tsetse Control Measures in the Vicinity of a Game Reserve
Creators: name: Childs, S. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: An equation, strongly reminiscent of Fisher's equation, is used to model the response of tsetse populations to proposed control measures in the vicinity of a game reserve. The model assumes movement is by diffusion and that growth is logistic. This logistic growth is dependent on an historical population, in contrast to Fisher's equation which bases it on the present population. The model therefore takes into account the fact that new additions to the adult fly population are, in actual fact, the descendents of a population which existed one puparial duration ago, furthermore, that this puparial duration is temperature dependent. Artificially imposed mortality is modelled as a proportion at a constant rate. Fisher's equation is also solved as a formality. The temporary imposition of a 2 % $\mathrm{day}^{-1}$ mortality everywhere outside the reserve for a period of 2 years will have no lasting effect on the influence of the reserve on either the Glossina austeni or the G. brevipalpis populations, although it certainly will eradicate tsetse from poor habitat, outside the reserve. A 5 $\mathrm{km}$-wide barrier with a minimum mortality of 4 % $\mathrm{day}^{-1}$, throughout, will succeed in isolating a worst-case, G. austeni population and its associated trypanosomiasis from the surrounding areas. A more optimistic estimate of its mobility suggests a mortality of 2 % $\mathrm{day}^{-1}$ will suffice. For a given target-related mortality, more mobile species are found to be more vulnerable to eradication than more sedentary species, while the opposite is true for containment.
description: 31 pages, 14 figures, 4 tables
Probing the physical properties of the intergalactic medium using blazars
Creators: name: Dalton, Tony
name: Morris, Simon L.
name: Fumagalli, Michele
name: Gatuzz, Efrain
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We use Swift blazar spectra to estimate the key intergalactic medium (IGM) properties of hydrogen column density(Nhxigm), metallicity and temperature over a redshift range of 0.03 leq z leq 4.7, using a collisional ionisation equilibrium(CIE) model for the ionised plasma. We adopted a conservative approach to the blazar continuum model given its intrinsic variability and use a range of power law models. We subjected our results to a number of tests and found that the Nhxigm parameter was robust with respect to individual exposure data and co-added spectra for each source, and between Swift and XMM-Newton source data. We also found no relation between Nhxigm and variations in source flux or intrinsic power laws. Though some objects may have a bulk Comptonisation component which could mimic absorption, it did not alter our overall results. The Nhxigm from the combined blazar sample scales as(1+z)^1.8+\-0.2. The mean hydrogen density at z = 0 is n0 = (3.2+\-0.5) x 10^-7 cm^-3. The mean IGM temperature over the full redshift range is log(T\K) = 6.1+\-0.1 and the mean metallicity is [X\H] = -1.62+\-0.04 (Z sim0.02) When combining with the results with a gamma-ray burst (GRB) sample, we find the results are consistent over an extended redshift range of 0.03 leq z leq 6.3. Using our model for blazars and GRBs, we conclude that the IGM contributes substantially to the total absorption seen in both blazar and GRB spectra.
description: Accepted for publication by the MNRAS. arXiv admin note: text overlap with arXiv:2102.02530
README plain text file for time-lapse confocal imaging of a Ng2:DsRed+ murine retinal explant in culture.
Creators: name: Chappell, John
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 310902
subject: Animal cell and molecular biology

description: README plain text file in support of data from time-lapse confocal imaging of a Ng2:DsRed+ murine retinal explant in culture experiment.
On the relationship between environment and galaxy properties in clusters of galaxies
Creators: name: Martinez, Hector J.
name: Coenda, Valeria
name: Muriel, Hernan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the correlation between different properties of bright (L>L*) galaxies in clusters and the environment in the Sloan Digital Sky Survey (SDSS). Samples of clusters of galaxies used in this paper are those selected by Coenda & Muriel that are drawn from the Popesso et al. and Koester et al. samples. Galaxies in these clusters have been identified in the Main Galaxy Sample of the Fifth Data Release (DR5) of SDSS. We analyse which galaxy properties correlate best with either, cluster mass or cluster-centric distance using the technique by Blanton et al. We find that galaxy properties do not clearly depend on cluster mass for clusters more massive than M~10^{14}M_sun. On the other hand, galaxy properties correlate with cluster-centric distance. The property most affected by the cluster-centric distance is g-r colour, closely followed by the u-r colour. These results are irrespective of the cluster selection criteria. The two samples of clusters were identified based on the X-ray emission and the galaxy colours, respectively. Moreover, the parameter that best predicts environment (i.e. cluster-centric distance) is the same found by Martinez & Muriel for groups of galaxies and Blanton at al. for the local density of field galaxies.
description: 6 pages, 3 figures, Accepted in MNRAS
IEEE Utility Big Data Workshop 2017 - Schedule & Speaker Bios
Creators: Jeff Katz
Valentine Emesih
Tony Bruton
Diran Obadina
Charles Vincent
Mirrasoul Mousavi
Brewster McCracken
Le Xie
Emma Mary Steward
Maurice Martinl Kathy Grise
David Belanger
Zita Vale
Publisher: name: IEEE
Year: 2017

Slides
Program distributed at the IEEE SG Big Data Workshop in San Antonio, Tx in September 2017. Includes schedule, topics and presenter bios
Per una retorica dell’assenza. Fascinazioni giapponesi nell’ultimo romanzo di V.V. Nabokov
Creators: name: Marchesini, Irina
Publisher: name: Università degli Studi di Cagliari
Year: 2014

description: Il concetto di assenza sembra svolgere la funzione di pilastro portante all’interno della poetica nabokoviana: la sua azione, che è costantemente tematica in tutti i romanzi, così come nella poesia, diventa in certi casi strutturale. Ciò è particolarmente evidente nella sua ultima opera, rimasta incompiuta, The Original of Laura (Dying is fun) (2009). Leggere questo libro attraverso il prisma della categoria di lotmaniana memoria pieno-vuoto rivela una strategia semantica e sintagmatica di significazione dell’esperienza tipicamente nabokoviana: il pieno viene evocato dal vuoto e dalla segmentazione. È proprio in quest’ottica che si vogliono indagare le strategie di rappresentazione del corpo femminile messe in atto in questo testo, concentrandosi in particolar modo sulla produttività della figura retorica dell’asindeto. Si commenterà poi la fascinazione dell’autore nei confronti della cultura giapponese, che si rivela decisamente in sintonia con l’immagine di ‘donna’ già sviluppata da Nabokov nelle sue poesie russe.
description: Between, Vol 4, N° 7 (2014): Poteri della retorica
An Elementary Derivation of the Five Dimensional Myers-Perry Metric
Creators: name: Peng, Jun-Jin
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive the five dimensional Myers-Perry metric via an elementary method to solve the vacuum Einstein field equations directly. This method firstly proposed by Clotz is very simple since it merely involves four components of Ricci tensor and only requires us to deal with some equations without second derivatives' terms when the metric ansatz is assumed to take an appropriate form.
description: 5 pages,no figures,accepted by GRG
Summation formulas for GJMS-operators and Q-curvatures on the Möbius sphere
Creators: name: Juhl, Andreas
name: Krattenthaler, Christian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 53B20, 53B30, 05A19, 33C20, 53A30

description: For the Möbius spheres $S^{q,p}$, we give alternative elementary proofs of the recursive formulas for GJMS-operators and $Q$-curvatures due to the first author [Geom. Funct. Anal. 23, (2013), 1278-1370; arXiv:1108.0273]. These proofs make essential use of the theory of hypergeometric series.
description: 21 pages; final version; updated presentation in view of more recent work of the first author and of Fefferman and Graham
Proof of a conjecture on unimodality
Creators: name: Wang, Yi
name: Yeh, Yeong-Nan
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A20

description: Let $P(x)$ be a polynomial of degree $m$, with nonnegative and non-decreasing coefficients. We settle the conjecture that for any positive real number $d$, the coefficients of $P(x+d)$ form a unimodal sequence, of which the special case $d$ being a positive integer has already been asserted in a previous work. Further, we explore the location of modes of $P(x+d)$ and present some sufficient conditions on $m$ and $d$ for which $P(x+d)$ has the unique mode $\lceil{m-d\over d+1}\rceil$.
description: 11 pages
title: Plasticity and Damage in Bimodal Grain Size Al-5083: Microstructural Finite Element
Creators: name: Nelson, Steven
Publisher: name: Utah State University
Year: 2010

description: Bimodal and nanocrystalline aluminum alloys are being investigated as stronger replacements for conventional polycrystalline aluminum alloys. Higher strengths are achieved by reducing the grain size of a metal; however, as the grain size is reduced the ductility diminishes. One solution that limits this decrease in ductility is the addition of a few microcrystalline grains into a nanocrystalline alloy, creating a bimodal microstructure that offers a better balance of strength and ductility. Two- and three-dimensional microstructural finite element (FE) simulations of monotonic and fatigue failures in Al-5083 having bimodal grain structures are conducted. To reduce the computational time and facilitate the modeling of microstructural features, a global-local model is developed. Macroscopic linear elastic and nonlinear plastic properties for each of the bimodal compositions are first used to simulate the tensile and fatigue tests in a global FE model. Subsequently, a local model that represents a single element at the center of the global model is built with distinct coarse grains (CGs) distributed throughout an ultra-fine grain (UFG) matrix. Ten percent of the elements in this model are defined as CGs, after which nanocrystalline and polycrystalline properties are assigned to the UFG and CG regions, respectively. Available fatigue test data is utilized to generate a low cycle fatigue damage model for bimodal grains size Al-5083 and obtain the damage model constants for varied levels of coarse grains. This fatigue damage model is then used in conjunction with a finite element continuum damage modeling approach, namely, successive initiation, to predict the damage and crack initiation sites and propagation paths in bimodal grains size alloys. The successive initiation method is used to continually accumulate damage in elements and initiate and propagate the crack through grains that reach the failure criteria defined for monotonic and cyclic loading. It is observed from the monotonic FE model that cracks initiate on the boundaries between CGs and UFGs then propagate through the UFG matrix around the CG until they become large enough to extend into the CGs themselves. In the cyclic FE models, the crack is observed to initiate in a CG and propagate along the CG and the surrounding UFG matrix.
Non-Markovian Dynamics and Entanglement in Quantum Brownian Motion
Creators: name: Shiokawa, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Dynamical aspects of quantum Brownian motion in a low temperature environment are investigated. We give a systematic calculation of quantum entanglement among two Brownian oscillators without invoking Born-Markov approximation widely used for the study of open systems. Our approach is suitable to probe short time dynamics at cold temperatures where many experiments on quantum information processing are performed.
description: 17 pages, 3 figures
IEEE Utility Big Data Workshop 2017 - Session 3 & 4
Creators: Dagmar Niebur
Le Xie
Tony Kuh
Charles Vincent
Le Xie
Emma Mary Stewart
Maurice Martin
Kathy Grise
David Belanger
Zita Vale
Publisher: name: IEEE
Year: 2017

Slides: Session 3- Big Data Research, Session 4 - Big Data Case Studies and Demos
Slides presented in San Antonio, TX in September 2017 in Session 3- Big Data Research, Session 4 - Big Data Case Studies and Demos
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Eskevich, Maria
name: de Melo, Gerard
name: Fäth, Christian
name: McCrae, John P.
name: Buitelaar, Paul
name: Chiarcos, Christian
name: Klimek, Bettina
name: Dojchinovski, Milan
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2019
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Computing methodologies → Natural language processing
subject: Computing methodologies → Knowledge representation and reasoning

description: Front Matter, Table of Contents, Preface, Conference Organization
description: OASIcs, Vol. 70, 2nd Conference on Language, Data and Knowledge (LDK 2019), pages 0:i-0:xvi
Chaos in coupled Kerr-nonlinear parametric oscillators
Creators: name: Goto, Hayato
name: Kanao, Taro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: A Kerr-nonlinear parametric oscillator (KPO) can generate a quantum superposition of two oscillating states, known as a Schrödinger cat state, via quantum adiabatic evolution, and can be used as a qubit for gate-based quantum computing and quantum annealing. In this work, we investigate complex dynamics, i.e., chaos, in two coupled nondissipative KPOs at a few-photon level. After showing that a classical model for this system is nonintegrable and consequently exhibits chaotic behavior, we provide quantum counterparts for the classical results, which are quantum versions of the Poincaré surface of section and its lower-dimensional version defined with time integrals of the Wigner and Husimi functions, and also the initial and long-term behavior of out-of-time-ordered correlators. We conclude that some of them can be regarded as quantum signatures of chaos, together with energy-level spacing statistics (conventional signature). Thus, the system of coupled KPOs is expected to offer not only an alternative approach to quantum computing, but also a promising platform for the study on quantum chaos.
description: 12 pages, 8 figures
Tension of toroidal magnetic field in reconnection plasmoids and relativistic jets
Creators: name: Nalewajko, Krzysztof
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Toroidal magnetic field is a key ingredient of relativistic jets launched by certain accreting astrophysical black holes, and of plasmoids emerging from the tearing instability during magnetic reconnection, a candidate dissipation mechanism in jets. Tension of toroidal field is an anisotropic force that can compress local energy and momentum densities. We investigate this effect in plasmoids produced during relativistic reconnection initiated from a Harris layer by means of kinetic particle-in-cell (PIC) numerical simulations, varying the system size (including 3D cases), magnetisation, or guide field. We find that: (1) plasmoid cores are dominated by plasma energy density for guide fields up to B_z ~ B_0; (2) relaxed 'monster' plasmoids compress plasma energy density only modestly (by factor ~3 above the initial level for drifting particle population); (3) energy density compressions by factors >~10 are achieved during plasmoid mergers, especially with the emergence of secondary plasmoids. This kinetic-scale effect can be combined with a global focusing of the jet Poynting flux along the quasi-cylindrical bunched spine (a proposed jet layer adjacent to the cylindrical core) due to poloidal line bunching (a prolonged effect of tension of the jet toroidal field) to enhance the luminosity of rapid radiation flares from blazars. The case of M87 as a misaligned blazar is discussed.
description: A&A accepted, 2.5 MB, 13 pages, 7 figures
Deep Convolutional Generative Modeling for Artificial Microstructure Development of Aluminum-Silicon Alloy
Creators: name: Mishra, Akshansh
name: Pathak, Tarushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Machine learning which is a sub-domain of an Artificial Intelligence which is finding various applications in manufacturing and material science sectors. In the present study, Deep Generative Modeling which a type of unsupervised machine learning technique has been adapted for the constructing the artificial microstructure of Aluminium-Silicon alloy. Deep Generative Adversarial Networks has been used for developing the artificial microstructure of the given microstructure image dataset. The results obtained showed that the developed models had learnt to replicate the lining near the certain images of the microstructures.
Prediction of trafficability of tile-drained farmland
Creators: name: Paul, Compton Laurence
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is in four parts that report on the development of two procedures for the prediction of trafficability of tile-drained lowland soils in the Lower Fraser Valley of British Columbia. By these procedures one can predict trafficability either from soil water tension in the plough layer or from water table depth. A mathematical model developed in the Netherlands for the simulation of vertical non-steady flow of water in soils was tested by data collected in Spring from farmers' fields. The model predicted depth to the water table and, less accurately, tension in the top 15 cm in fields drained by tiles spaced at 30.5 m and 15.2 m. Cone penetration resistance (an index of soil strength) of soil in the field was found to be linearly dependent upon soil water tension between 0 and 100 - 175 cm of water. It was possible to predict the slope of this relationship for two mineral soils, but not for an organic soil. Trafficability tests with typical farm vehicles were carried out on one organic and two mineral soils at various degrees of wetness. Soil structure was significantly damaged after the first and third passes of the vehicles. The damage was greatest when the soil was near saturation. However, indices of structure could not be used per se as criteria for trafficable conditions. For each soil a relationship was established between soil strength and traction efficiency measured by wheelslip. A critical value of strength for trafficability was then obtained by using 20% wheelslip as a limiting value for traction efficiency. Reference to known strength-tension curves yielded critical tensions for trafficability. Soil strength was linearly dependent upon water table depth in Spring when evapotranspiration was small and when water table depth was less than 80 cm. Critical water table depths for trafficability inferred from this relationship were 53, 45, and 60 cm for Lumbum muck, Hallart silty clay loam (grassland), and Hallart silty clay loam (cultivated land), respectively. The effect of tile spacing on trafficability in Spring was assessed over a 2-year period. Evidence to support increased benefits due to the closer spacing was inconclusive in both soil types. When compared to undrained land the larger spacing of 30.5 m resulted in a significant increase in the number of trafficable days. Tile drainage was twice as important for the attainment of trafficable conditions in the muck as in the mineral soils. Two procedures for predicting trafficability of tile-drained farmland were described. Predictions by these procedures for two tile spacings in both soil types in Spring 1977 were within 3 days of one another and compared extremely well with dates on which measured water table depth and tension were considered adequate for trafficability.
IEEE Utility Big Data Workshop 2017 - Session 1 & 2
Creators: Jeff Katz
Valentine Emesih
Tony Bruton
Diran Obadina
Charles Vincent
Mirrasoul Mousavi
Brewster McCracken
Tom Overbye
John Trowbridge
Rolanda Vega
Publisher: name: IEEE
Year: 2017

Slides: Session 1- Big Data Challenges and Opportunities, Session 2 -  Big Data Platforms and Warehouses
Slides presented in San Antonio, TX in September 2017 in Session 1- Big Data Challenges and Opportunities and Session 2 -  Big Data Platforms and Warehouses
Spin precession and neutrino helicity flip in various spacetimes
Creators: name: Saadati, Reza
name: Hammad, Fayçal
name: Novoa-Cattivelli, Santiago
name: Simard, Mathieu
name: Fleury, Nicolas
Publisher: name: arXiv
Year: 2025
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We systematically study spin precession of neutral particles freely moving in spacetime. We first derive the formula describing spin precession within a general stationary and axisymmetric spacetime. We then apply our formula to study spin precession of neutral spinning particles moving within various spacetimes that are among the most ubiquitous ones found in the literature. Our results are then used to extract the helicity flip probability for neutrinos propagating in each one of those selected spacetimes. It is found that low-energy neutrinos acquire a spin-flip probability that is as large as unity in all the spacetimes considered here. The remarkable result, however, is that while spin-flip probability for high-energy neutrinos remains insignificant in most of these spacetimes, some of them do allow spin-flip probability to reach unity even for high-energy neutrinos.
Idling Magnetic White Dwarf in the Synchronizing Polar BY Cam. The Noah-2 Project
Creators: name: Andronov, Ivan L.
name: Antoniuk, Kirill A.
name: Breus, Vitalii V.
name: Chinarova, Lidia L.
name: Han, Won Young
name: Jeon, Young Beom
name: Kim, Yonggi
name: Kolesnikov, Sergey V.
name: Oh, Joon Young
name: Pavlenko, Elena P.
name: Shakhovskoy, Nikolay M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Results of a multi-color study of the variability of the magnetic cataclysmic variable BY Cam are presented. The observations were obtained at the Korean 1.8m and Ukrainian 2.6m, 1.2m and 38-cm telescopes in 2003-2005, 56 observational runs cover 189 hours. The variations of the mean brightness in different colors are correlated with a slope dR/dV=1.29(4), where the number in brackets denotes the error estimates in the last digits. For individual runs, this slope is much smaller ranging from 0.98(3) to 1.24(3), with a mean value of 1.11(1). Near the maximum, the slope becomes smaller for some nights, indicating more blue spectral energy distribution, whereas the night-to-night variability has an infrared character. For the simultaneous UBVRI photometry, the slopes increase with wavelength from dU/dR=0.23(1) to dI/dR=1.18(1). Such wavelength dependence is opposite to that observed in non-magnetic cataclysmic variables, in an agreement to the model of cyclotron emission. The principal component analysis shows two (with a third at the limit of detection) components of variablitity with different spectral energy distribution, which possibly correspond to different regions of emission. The scalegram analysis shows a highest peak corresponding to the 200-min spin variability, its quarter and to the 30-min and 8-min QPOs. The amplitudes of all these components are dependent on wavelength and luminosity state. The light curves were fitted by a statistically optimal trigonometrical polynomial (up to 4-th order) to take into account a 4-hump structure. The dependences of these parameters on the phase of the beat period and on mean brightness are discussed. The amplitude of spin variations increases with an increasing wavelength and with decreasing brightness
description: 30pages, 11figures, accepted in Cent.Eur.J.Phys
Understanding Compact Object Formation and Natal Kicks: II. The case of XTE J1118+480
Creators: name: Fragos, T.
name: Willems, B.
name: Kalogera, V.
name: Ivanova, N.
name: Rockefeller, G.
name: Fryer, C. L.
name: Young, P. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In recent years, an increasing number of proper motions have been measured for Galactic X-ray binaries. When supplemented with accurate determinations of the component masses, orbital period, and donor effective temperature, these kinematical constraints harbor a wealth of information on the system's past evolution. Here, we consider all this available information to reconstruct the full evolutionary history of the black hole X-ray binary XTE J1118+480, assuming that the system originated in the Galactic disk and the donor has solar metallicity. This analysis accounts for four evolutionary phases: mass transfer through the ongoing X-ray phase, tidal evolution before the onset of Roche-lobe overflow, motion through the Galactic potential after the formation of the black hole, and binary orbital dynamics due to explosive mass loss and possibly a black hole natal kick at the time of core collapse. We find that right after black hole formation, the system consists of a ~6.0-10.0 solar masses black hole and a ~1.0-1.6 solar masses main-sequence star. We also find that that an asymmetric natal kick is not only plausible but required for the formation of this system, and derive a lower and upper limit on the black hole natal kick velocity magnitude of 80 km/s and 310 km/s, respectively.
description: 32 pages, 5 figures, submitted to ApJ