cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Adaptation behavior of skilled infant bouncers to different spring frequencies
Creators: name: Habib Perez, Olinda
name: Walters-Stewart, Coren
name: Robertson, D.G. E
name: Baddour, Natalie
name: Sveistrup, Heidi
Publisher: name: Motricidade
Year: 2015

description: Infants explore their environments through repetitive movements that are constrained or facilitated by the environmental context. In this study, we evaluated how skilled bouncers adapted to bouncing in systems with four different spring conditions (natural frequencies of 0.9, 1.15, 1.27 and 1.56 Hz). Trunk kinematics and vertical ground reaction forces (VGRFs) were recorded from three pre-walking infants (mean age 10.6 ±0.9 months). Bounce frequency, trunk displacement, peak VGRF, percent of time on the ground and time to peak force as a function of time on the ground were analyzed. In addition, infant bounce frequencies were compared to measured oscillations of an inert mass equivalent to each infant’s mass. All infants bounced above the natural frequency of the spring system in all conditions suggesting that they did not behave solely like mass-spring systems. Infants produced asymmetrical VGRF loading patterns suggesting that a timing component, such as bounce frequency, was regulated. Skilled infants consistently increased their bounce frequency as their vertical trunk displacement decreased; however, the mode for regulating bounce frequency differed from infant to infant.
description: Motricidade, Vol 11 No 1 (2015)
Cyclotron enhancement of tunneling
Creators: name: Medvedeva, M. V.
name: Larkin, I. A.
name: Ujevic, S.
name: Shchur, L. N.
name: Ivlev, B. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A state of an electron in a quantum wire or a thin film becomes metastable, when a static electric field is applied perpendicular to the wire direction or the film surface. The state decays via tunneling through the created potential barrier. An additionally applied magnetic field, perpendicular to the electric field, can increase the tunneling decay rate for many orders of magnitude. This happens, when the state in the wire or the film has a velocity perpendicular to the magnetic field. According to the cyclotron effect, the velocity rotates under the barrier and becomes more aligned with the direction of tunneling. This mechanism can be called cyclotron enhancement of tunneling.
Intraindividual variability of the histological, chronological and growth patterns in post-cranial elements of Liaoningvenator curriei (Paraves: Troodontidae)
Creators: name: Martin, Damien
name: Caizhi, Shen
name: Kundrát, Martin
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Plant Biology

description: A comprehensive description of the histology of 10 postcranial bones taken from Liaoningvenator curriei (holotype: DNHM D3012) is presented. Corresponding bone samples were sectioned to a thickness of 30 micrometres. The sections were then examined using transmitted and crossed-polarised light microscopes and photographed using an adapted camera and associated capture software. The study reveals that DNHM D3012 was a subadult approaching adulthood, certainly in its fifth year at the time of death. The comparisons of the different sections revealed that in L. curriei (DNHM D3012), the bones from forelimb elements grew faster than those from hind limb elements, this growth strategy likely being linked to its ground-dwelling locomotion. Interspecific comparisons with those other deinonychosaurs and basal avialans suggest that L. curriei (DNHM D3012) exhibits a transitive growth pattern between basalmost, smaller forms of troodontid, and more derived forms that got larger by extending the period of fast growth.
Avaliação do conhecimento dos professores de educação física para reagirem a situações de emergência
Creators: name: Esteves, Dulce
name: Pinheiro, Paulo
name: Brás, Rui
name: O'Hara, Kelly
name: Rodrigues, Ricardo
Publisher: name: Motricidade
Year: 2015

description: O conhecimento dos Professores de Educação Física (EF) sobre 1os socorros condiciona a sua atuação em situações de emergência, pelo que é importante avaliá-lo. Neste sentido, desenhou-se um questionário para avaliar (1) o conhecimento teórico sobre como atuar em situações de emergência (KT); (2) o conhecimento operacional (KO) de atuação face à emergência e (3) de que modo idade, género, habilitações literárias, perceção do conhecimento e fontes de informação influenciam KT e KO. Participaram no estudo 284 professores (57.7% H; 41.9% M; 37.6 ± 7.1 anos), onde 19% dos professores entrevistados têm bom nível de KT e 49,5% bom nível de KO. A idade e habilitações literárias influenciam o conhecimento: os mais jovens mostram melhor KT e KO e os Mestres melhor KT mas um nível igual de KO. O género não influencia nem KT nem KO. Médicos/enfermeiros e formação profissional são as melhores fontes de informação para melhorar KO. Uma vez que 50.5% dos professores apresentam nível mau ou médio de KO, a introdução de módulos de 1os socorros na formação profissional, especialmente se estes forem lecionados por médicos/enfermeiros, pode ser uma estratégia eficiente para melhorar o conhecimento de atuação face à emergência.
description: Motricidade, Vol 11 No 1 (2015)
Cavity losses for the dissipative Jaynes-Cummings Hamiltonian beyond Rotating Wave Approximation
Creators: name: Scala, M.
name: Militello, B.
name: Messina, A.
name: Maniscalco, S.
name: Piilo, J.
name: Suominen, K. -A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A microscopic derivation of the master equation for the Jaynes-Cummings model with cavity losses is given, taking into account the terms in the dissipator which vary with frequencies of the order of the vacuum Rabi frequency. Our approach allows to single out physical contexts wherein the usual phenomenological dissipator turns out to be fully justified and constitutes an extension of our previous analysis [Scala M. {\em et al.} 2007 Phys. Rev. A {\bf 75}, 013811], where a microscopic derivation was given in the framework of the Rotating Wave Approximation.
description: 12 pages, 1 figure
Empirical Photometric Redshifts of Luminous Red Galaxies and Clusters in SDSS
Creators: name: Lopes, P. A. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this work I discuss the necessary steps for deriving photometric redshifts for luminous red galaxies (LRGs) and galaxy clusters through simple empirical methods. The data used is from the Sloan Digital Sky Survey (SDSS). I show that with three bands only ({\it gri}) it is possible to achieve results as accurate as the ones obtained by other techniques, generally based on more filters. In particular, the use of the $(g-i)$ color helps improving the final redshifts (especially for clusters), as this color monotonically increases up to $z \sim 0.8$. For the LRGs I generate a catalog of $\sim 1.5$ million objects at $z < 0.70$. The accuracy of this catalog is $σ= 0.027$ for $z \le 0.55$ and $σ= 0.049$ for $0.55 < z \le 0.70$. The photometric redshift technique employed for clusters is independent of a cluster selection algorithm. Thus, it can be applied to systems selected by any method or wavelength, as long as the proper optical photometry is available. When comparing the redshift listed in literature to the photometric estimate, the accuracy achieved for clusters is $σ= 0.024$ for $z \le 0.30$ and $σ= 0.037$ for $030 < z \le 0.55$. However, when considering the spectroscopic redshift as the mean value of SDSS galaxies on each cluster region, the accuracy is at the same level as found by other authors: $σ= 0.011$ for $z \le 0.30$ and $σ= 0.016$ for $030 < z \le 0.55$. The photometric redshift relation derived here is applied to thousands of cluster candidates selected elsewhere. I have also used galaxy photometric redshifts available in SDSS to identify groups in redshift space and then compare the redshift peak of the nearest group to each cluster redshift (ABRIDGED).
description: 14 pages, 6 figures. Accepted to MNRAS. Minor changes in response to referee report
Realization of room temperature polaritonic vortex in momentum space with hybrid Perovskite metasurface
Creators: name: Dang, Nguyen Ha My
name: Zanotti, Simone
name: Chevalier, Céline
name: Trippé-Allard, Gaëlle
name: Deleporte, Emmanuelle
name: Amara, Mohamed
name: Ardizzone, Vincenzo
name: Sanvitto, Daniele
name: Andreani, Lucio Claudio
name: Seassal, Christian
name: Gerace, Dario
name: Nguyen, Hai Son
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Exciton-polaritons are mixed light-matter excitations that result from the strong coupling regime between an active excitonic material and photonic resonances. Harnessing these hybrid excitations provides a rich playground to explore fascinating fundamental features, such as out-of-equilibrium Bose-Einstein condensation and quantum fluids of light, as well as novel mechanisms to be exploited in optoelectronic devices. Here, we investigate experimentally the formation of exciton-polaritons arising from the mixing between hybrid inorganic-organic perovskite excitons and an optical Bound state In a Continuum (BIC) of a subwavelength-scale metasurface, at room temperature. These polaritonic eigenmodes, hereby called polariton BICs (pol-BICs) are revealed in both reflectivity, resonant scattering, and photoluminescence measurements. Although pol-BICs only exhibit a finite quality factor that is bounded by the non-radiative losses of the excitonic component, they fully inherit BIC peculiar features: a full uncoupling from the radiative continuum in the vertical direction, which is associated to a locally vanishing farfield radiation in momentum space. Most importantly, our experimental results confirm that the topological nature of the photonic BIC is perfectly transferred to the pol-BIC. This is evidenced with the observation of a polarization vortex in the farfield of polaritonic emission. Our results pave the way to engineer BIC physics of interacting bosons, as well as novel room temperature polaritonic devices.
A deep learning-based taphonomical approach to distinguish the modifying agent in the Late Pleistocene site of Toll Cave (Barcelona, Spain)
Creators: name: Pizarro-Monzo, Marcos
name: Rosell, Jordi
name: Rufà, Anna
name: Rivals, Florent
name: Blasco, Ruth
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified

description: One of the most widely used methods to associate lithic tools and bone assemblage in archaeological sites is the identification of cut-marks. However, the identification of these marks is still problematic in some localities on account of the similarities with the modifications generated by non-human processes, including biostratinomic and post-depositional bone surface modifications. Toll Cave (Barcelona, Spain), with chronologies between 47.310 BP and 69.800 BP, is one of the case studies where the cut-marks could easily be confused with abundant grooves generated by the dragging of sedimentary particles (e.g. trampling), but also with the scores produced by carnivores. In this work, we present the results obtained from applying Deep Learning (DL) models to the taphonomic analysis of the site. This methodological approach has allowed us to distinguish the bone surface modifications with 97.5% reliability. We show the usefulness of this technique to help solve many taphonomic equifinality problems in the archaeological assemblages, as well as the need to implement new approaches to eliminate subjectivity in the descriptions of bone damage and make more accurate inferences about the past.
Efeitos de um programa educacional de autocuidado de coluna em idosos com dor lombar crônica: um estudo quasi-experimental
Creators: name: Rios, Julia Catarina Sebba
name: Leite, Tailce Kaley Moura
name: Pereira, Márcio De Moura
name: Sousa, Fabiany Calixto
name: Safons, Marisete Peralta
Publisher: name: Motricidade
Year: 2015

description: O estudo teve por objetivo verificar os efeitos de um programa educacional de autocuidado de coluna, no controle da dor e na incapacidade em idosos ativos com dor lombar crônica (DL) não específica. Os idosos foram divididos em grupo experimental (GE n = 17) e controle (GC n = 13). A intervenção consistiu na entrega de uma cartilha educativa e um workshop. Foram variáveis dependentes: 1. intensidade da dor (EVN), 2. capacidade funcional relacionada à DL (RMQ), 3. quantidade de pontos de dor, 4. uso de medicação para DL e 5. frequência de uso de medicação para DL. Houve avaliação pré e após 1 mês da primeira avaliação. Na avaliação intragrupo foi observada no GE diminuição significativa de todos os parâmetros avaliados (todos p < 0,05) fato não observado no GC. Quanto à análise entre os grupos houve melhora significativa com tamanhos de efeitos moderados a grandes no GE para EVN (p=0.003, TE=0.53), no RMQ (p=0.037, TE=0.38) e nos pontos de dor (p=0.006, TE=0.49). Os resultados demonstraram que a cartilha pode ser uma ferramenta útil, capaz de gerar independência no cuidado e tratamento da DL crônica em idosos ativos.
description: Motricidade, Vol 11 No 1 (2015)
Microphase separation in polyelectrolytic diblock copolymer melt : weak segregation limit
Creators: name: Kumar, Rajeev
name: Muthukumar, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a generalized theory of microphase separation for charged-neutral diblock copolymer melt. Stability limit of the disordered phase for salt-free melt has been calculated using Random Phase Approximation (RPA) and self-consistent field theory (SCFT). Explicit analytical free energy expressions for different classical ordered microstructures (lamellar, cylinder and sphere) are presented. We demonstrate that chemical mismatch required for the onset of microphase separation ($χ^{\star} N$) in charged-neutral diblock melt is higher and the period of ordered microstructures is lower than those for the corresponding neutral-neutral diblock system. Theoretical predictions on the period of ordered structures in terms of Coulomb electrostatic interaction strength, chain length, block length, and the chemical mismatch between blocks are presented. SCFT has been used to go beyond the stability limit, where electrostatic potential and charge distribution are calculated self-consistently. Stability limits calculated using RPA are in perfect agreement with the corresponding SCFT calculations. Limiting laws for stability limit and the period of ordered structures are presented and comparisons are made with an earlier theory. Also, transition boundaries between different morphologies have been investigated.
Fundamental stellar parameters of benchmark stars from CHARA interferometry -- III. Giant and subgiant stars
Creators: name: Karovicova, I.
name: White, T. R.
name: Nordlander, T.
name: Casagrande, L.
name: Ireland, M.
name: Huber, D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Large spectroscopic surveys of the Milky Way need to be calibrated against a sample of benchmark stars to ensure the reliable determination of atmospheric parameters. We present new fundamental stellar parameters of seven giant and subgiant stars that will serve as benchmarks. The aim is to reach a precision of 1% in the effective temperature. This precision is essential for accurate determinations of the full set of fundamental parameters and abundances of stars observed by the surveys. We observed HD121370 (etaBoo), HD161797 (muHer), HD175955, HD182736, HD185351, HD188512 (betaAql), and HD189349 using the high angular resolution optical interferometric instrument PAVO/CHARA. The limb-darkening corrections were determined from 3D model atmospheres based on the STAGGER grid. The Teff were determined directly from the Stefan-Boltzmann relation, with an iterative procedure to interpolate over tables of bolometric corrections. We estimated surface gravities from comparisons to Dartmouth stellar evolution model tracks. The spectroscopic observations were collected from the ELODIE and FIES spectrographs. We estimated metallicities ([Fe/H]) from a 1D non-local thermodynamic equilibrium (NLTE) abundance analysis of unblended lines of neutral and singly ionised iron. For six of the seven stars we measure Teff to better than 1%. For one star, HD189349, the uncertainty in Teff is 2% due to an uncertain bolometric flux. We do not recommend this star as a benchmark until this measurement can be improved. Median uncertainties for all stars in logg and [Fe/H]} are 0.034dex and 0.07dex, respectively. All the fundamental stellar parameters were based on consistently combining interferometric observations, 3D limb-darkening modelling and spectroscopic analysis. This paper follows our previous papers including dwarfs and metal-poor stars.
description: 14 pages, 8 figures, 9 tables, tables A.1.-A.7. will be submitted electronically, accepted for publication in A&A. arXiv admin note: text overlap with arXiv:2006.05411
Preplasma characterization at PHELIX
Creators: name: Wagner, F.
name: Bedacht, S.
name: Ortner, A.
name: Zielbauer, B.
name: Roth, M.
name: Bagnoud, V.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Perturbation method for determining the group of invariance of hierarchical models
Creators: name: Sei, Tomonari
name: Aoki, Satoshi
name: Takemura, Akimichi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62H17; 05E20

description: We propose a perturbation method for determining the (largest) group of invariance of a toric ideal defined in Aoki and Takemura [2008a]. In the perturbation method, we investigate how a generic element in the row space of the configuration defining a toric ideal is mapped by a permutation of the indeterminates. Compared to the proof in Aoki and Takemura [2008a] which was based on stabilizers of a subset of indeterminates, the perturbation method gives a much simpler proof of the group of invariance. In particular, we determine the group of invariance for a general hierarchical model of contingency tables in statistics, under the assumption that the numbers of the levels of the factors are generic. We prove that it is a wreath product indexed by a poset related to the intersection poset of the maximal interaction effects of the model.
description: 17pages, no figures
On permutation polytopes
Creators: name: Baumeister, Barbara
name: Haase, Christian
name: Nill, Benjamin
name: Paffenholz, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20B35, 52B12; 05E10, 52B05, 52B20, 90C27

description: A permutation polytope is the convex hull of a group of permutation matrices. In this paper we investigate the combinatorics of permutation polytopes and their faces. As applications we completely classify permutation polytopes in dimensions 2,3,4, and the corresponding permutation groups up to a suitable notion of equivalence. We also provide a list of combinatorial types of possibly occuring faces of permutation polytopes up to dimension four.
description: AMS-LaTeX, 22 pages
O'QUVCHILARDA MILLIY IFTIXOR TUYG'USINI RIVOJLANTIRISHNING MUHIM YO'NALISHLARI
Creators: name: Sharopov, Dilshod
Publisher: name: Zenodo
Year: 2023

description: Mamlakatimizda ta’lim sohasida olib borilayotgan islohotlarning asosi ijtimoiy-iqtisodiy va madaniy o‘zgarishlarga faol ta’sir ko‘rsatishga qodir shaxsni rivojlantirish va o‘z sohasining yetuk  mutaxassislarini tayyorlashdir. Hozirgi kunda yoshlarimiz mustaqil, kreativ fikrlovchi, tashabbuskor, mas’uliyatli, muammolarni hal qilishga qodir, hayotdagi innovatsiyalarni o‘rganishga tayyor, mustaqil ravishda qaror qabul qiluvchi bo‘lishi lozim.
Self-force on a charged particle in an external scalar field
Creators: name: Noble, Adam
name: Burton, David A.
name: Docherty, Lauren
name: Jaroszynski, Dino A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A charged particle subject to strong external forces will accelerate, and so radiate energy, inducing a self-force. This phenomenon remains contentious, but advances in laser technology mean we will soon encounter regimes where a more complete understanding is essential. The terms "self-force" and "radiation reaction" are often used synonymously, but reflect different aspects of the recoil force. For a particle accelerating in an electromagnetic field, radiation reaction is usually the dominant self-force, but in a scalar field this is not the case, and the total effect of the self-force can be anti-frictional. Aspects of this self-force can be recast in terms of spacetime geometry, and this interpretation illuminates the long-standing enigma of a particle radiating while experiencing no self-force.
description: To appear in New Journal of Physics
Examples of Non-Rigid CAT(0) Groups from the Category of Knot Groups
Creators: name: Mooney, Christopher
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 57M07; 20F65

description: C Croke and B Kleiner have constructed an example of a CAT(0) group with more than one visual boundary. J Wilson has proven that this same group has uncountably many distinct boundaries. In this article we prove that the knot group of any connected sum of two non-trivial torus knots also has uncountably many distinct CAT(0) boundaries.
description: 16 pages, 2 figures
Energy loss measurements of heavy ions in dense weakly coupled plasma generated by volumetric heating with hohlraum generated x-rays
Creators: name: Ortner, A.
name: Blazevic, A.
name: Basko, M.
name: Bedacht, S.
name: Cayzac, W.
name: Frank, A.
name: Faik, S.
name: Kraus, D.
name: Rienecker, T.
name: Schaumann, G.
name: Schumacher, Dennis
name: Tauschwitz, An.
name: Wagner, F.
name: Roth, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Novel Findings about Myopia in Patients with Oculodermal Melanocytosis (Nevus of Ota)
Creators: name: Chung, Ho Seok
name: Lee, Jae Hyuck
name: Moon, Su Young
name: Lee, Hun
name: Kim, Jae Yong
name: Tchah, Hung Won
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Purpose: To test the hypothesis that ocular pigment in patients with oculodermal melanocytosis decreases myopia severity. Methods: Refractive and biometric parameters were measured and compared between pigmented eyes and non-pigmented contralateral eyes in oculodermal melanocytosis patients that underwent surgical ocular pigmentation removal. To assess pigmentation, the pigmentation score was measured in each quadrant of the sclera and added together for a cumulative score. For subgroup analyses, patients were categorized into three groups according to the severity of myopia in the non-pigmented eye. Results: Fifty-five patients (110 eyes) were included. Spherical power and spherical equivalent were significantly less myopic in pigmented eyes relative to contralateral non-pigmented eyes. The spherical powers of non-pigmented eyes were positively correlated with the difference in spherical power between contralateral eyes (r = 0.697, p p = .005). In subgroup analyses, pigmented eyes exhibited significantly less myopic spherical powers and spherical equivalents than non-pigmented contralateral eyes in the moderate and high myopia groups. Pigmented eyes exhibited significantly shorter axial length than non-pigmented contralateral eyes in the high myopia group only. Conclusions: In patients with oculodermal melanocytosis, pigmented eyes exhibited less severe myopia relative to non-pigmented contralateral eyes. This suggested that ocular pigmentation inhibited myopic changes, potentially by blocking UV transmission. This study will be helpful in elucidating the mechanisms of myopic progression.
Supp 2: Hydrothermal alteration and elemental mass balance for the Surda Copper Deposit, Singhbhum Shear Zone, Eastern India: implications for both copper and magnetite-apatite mineralization
Creators: name: Chowdhury, Sangita
name: Lentz, David R.
name: Pal, Dipak C.
Publisher: name: Geological Society of London
Year: 2024
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Supplementary Text 2
Relaxation dynamics and interrupted coarsening in irrationally frustrated superconducting arrays
Creators: name: Jeon, Gun Sang
name: Lee, Sung Jong
name: Kim, Bongsoo
name: Choi, M. Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Equilibrium and non-equilibrium relaxation behaviors of two-dimensional superconducting arrays are investigated via numerical simulations at low temperatures in the presence of incommensurate transverse magnetic fields, with frustration parameter f= (3-\sqrt{5})/2. We find that the non-equilibrium relaxation, beginning with random initial states quenched to low temperatures, exhibits a three-stage relaxation of chirality autocorrelations. At the early stage, the relaxation is found to be described by the von Schweidler form. Then it exhibits power-law behavior in the intermediate time scale and faster decay in the long-time limit, which together can be fitted to the Ogielski form; for longer waiting times, this crosses over to a stretched exponential form. We argue that the power-law behavior in the intermediate time scale may be understood as a consequence of the coarsening behavior, leading to the local vortex order corresponding to f=2/5 ground-state configurations. High mobility of the vortices in the domain boundaries, generating slow wandering motion of the domain walls, may provide mechanism of dynamic heterogeneity and account for the long-time stretched exponential relaxation behavior. It is expected that such meandering fluctuations of the low-temperature structure give rise to finite resistivity at those low temperatures; this appears consistent with the zero-temperature resistive transition in the limit of irrational frustration.
description: 9 pages, 18 figures
Frequency and damping of the Scissors Mode of a Fermi gas
Creators: name: Bruun, G. M.
name: Smith, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We calculate the frequency and damping of the scissors mode in a classical gas as a function of temperature and coupling strength. Our results show good agreement with the main features observed in recent measurements of the scissors mode in an ultracold gas of $^6$Li atoms. The comparison between theory and experiment involves no fitting parameters and thus allows an identification of non-classical effects at and near the unitarity limit.
description: 4 pages, 2 figures
[Description to the cover of the GSI Scientific Report 2013]
Creators: name: Düllmann, Christoph Emanuel
name: Yakushev, Alexander
name: Rudolph, D.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: The cover shows the set-up and the key results of the element $Z=115$ experiment conducted at GSI's gas-filled recoil separator TASCA. The $\alpha$-photon coincidence spectroscopy set-up TASISpec consists of a box of pixelated Si-detectors with surrounding composite Ge-detectors (schematic representation top right). This setup allows detecting superheavy nuclei via their implantation and subsequent nuclear decay and their direct identification by measuring characteristic $X$ rays. \\For the experiment an intense $^{48}$Ca beam provided by the UNILAC accelerator impinged on a radioactive $^{243}$Am target wheel placed at the entrance to TASCA (photo bottom left).  30 correlated $\alpha$-decay chains, assigned to element 115, were registered in TASISpec within three weeks. Twenty-two of them originated from the isotope with mass number 288 (average values given in the displayed chain at the diagonal). Observed $\alpha$-photon coincidences (black histograms, upper left) include two $K$ $X$-ray candidates along the decay chain, the energies of which are compatible with the assignment of the chains to element $Z=115$. Further coincidences led for the first time to detailed decay schemes (lower right) of superheavy elements near the predicted 'Island of Stability'. The $E1$ $\gamma$ rays in $^{276}$Mt give rise to significant constraints on nuclear structure models. A complex, but in parts still tentative, decay scheme of $^{272}$Bh can explain the emission of the two $K$ $X$-ray candidates. Detailed GEANT4 Monte-Carlo simulations (see TASISpec scheme, top right) were employed for the first time in an experiment on such superheavy nuclei. They allow for a crucial self-consistency check of the interpretation (decay schemes, bottom right) of the measured data (spectra, green curves, top left).\\This experiment was selected by the American Physics Society as one of the top ten 'Physics Newsmakers of the Year 2013'.
Cavity Enhanced Optical Vernier Spectroscopy, Broad Band, High Resolution, High Sensitivity
Creators: name: Gohle, Christoph
name: Stein, Björn
name: Schliesser, Albert
name: Udem, Thomas
name: Hänsch, Theodor W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A femtosecond frequency comb provides a vast number of equidistantly spaced narrow band laser modes that can be simultaneously tuned and frequency calibrated with 15 digits accuracy. Our Vernier spectrometer utilizes all of theses modes in a massively parallel manner to rapidly record both absorption and dispersion spectra with a sensitivity that is provided by a high finesse broad band optical resonator and a resolution that is only limited by the frequency comb line width while keeping the required setup simple.
description: 11 pages, 3 figures, submitted to PRL
Towards Intelligent Load Balancing in Data Centers
Creators: name: Yao, Zhiyuan
name: Desmouceaux, Yoann
name: Townsley, Mark
name: Clausen, Thomas Heide
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Artificial Intelligence (cs.AI)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Network load balancers are important components in data centers to provide scalable services. Workload distribution algorithms are based on heuristics, e.g., Equal-Cost Multi-Path (ECMP), Weighted-Cost Multi-Path (WCMP) or naive machine learning (ML) algorithms, e.g., ridge regression. Advanced ML-based approaches help achieve performance gain in different networking and system problems. However, it is challenging to apply ML algorithms on networking problems in real-life systems. It requires domain knowledge to collect features from low-latency, high-throughput, and scalable networking systems, which are dynamic and heterogenous. This paper proposes Aquarius to bridge the gap between ML and networking systems and demonstrates its usage in the context of network load balancers. This paper demonstrates its ability of conducting both offline data analysis and online model deployment in realistic systems. The results show that the ML model trained and deployed using Aquarius improves load balancing performance yet they also reveals more challenges to be resolved to apply ML for networking systems.
The role of fluctuations in the phase diagram of two color QCD
Creators: name: Khan, N.
name: Pawlowski, J.
name: Rennecke, F.
name: Scherer, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Supplementary Material from Flightlessness in insects enhances diversification and determines assemblage structure across whole communities
Creators: name: Salces-Castellano, Antonia
name: Andújar, Carmelo
name: López, Heriberto
name: Pérez-Delgado, Antonio J.
name: Arribas, Paula
name: Emerson, Brent C.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: Ecology

description: Dispersal limitation has been recurrently suggested to shape both macroecological patterns and microevolutionary processes within invertebrates. However, because of potential interactions among biological, environmental, temporal, and spatial variables, causal links among flight-related traits, diversification and spatial patterns of community assembly remain elusive. Integrating genetic variation within species across whole insect assemblages, within a simplified spatial and environmental framework, can be used to reduce the impact of these potentially confounding variables. Here, we used standardized sampling and mtDNA sequencing for a whole-community characterization of the beetle fauna inhabiting a singular forested habitat (laurel forest) within an oceanic archipelago setting (Canary Islands). The spatial structure of species assemblages together with species-level genetic diversity was compared at the archipelago and island scales for 104 winged and 110 wingless beetle lineages. We found that wingless beetle lineages have (i) smaller range sizes at the archipelago scale, (ii) lower representation in younger island communities, (iii) stronger population genetic structure and (iv) greater spatial structuring of species assemblages between and within islands. Our results reveal that dispersal limitation is a fundamental trait driving diversity patterns at multiple hierarchical levels by promoting spatial diversification and affecting the spatial configuration of entire assemblages at both island and archipelago scales.
Rediscovering censorship to understand the struggle for the contemporaneous age-oriented movie rating system
Creators: name: Giusti, Maria
Publisher: name: La Rivista di Engramma
Year: 2021
Subjects: censorship
Italian cinema
minors protection

description: In Italy, since 1913, producers were required to obtain approval from a ministerial committee before screening their films in theaters. The committee could either censor the whole film or impose cuts. This paper explores the relationship between cuts and images through the analysis of some movies that were (or were not) cut for reasons not immediately clear: Godard’s Une femme mariée, Fellini’s La dolce vita, Anonioni’s Il grido and and Rosi’s Salvatore Giuliano. Are cuts decisions (or lack of them) always related to the film’s topic, or may they depend on the images narrating the topic themselves? Did it ever occur that images were used as a pretext for cutting something different from what was stated? After having reasoned upon these and other questions, the paper analyses advantages and disadvantages – for the freedom of artistic expression – of the possible juridical approaches to films rating. Indeed, the Italian State can no longer censor films, but it is still in charge of establishing whether they are suitable for everyone or adults only.
Nearly room temperature ferromagnetism in pressure-induced correlated metallic state of van der Waals insulator CrGeTe$_3$
Creators: name: Bhoi, Dilip
name: Gouchi, Jun
name: Hiraoka, Naoka
name: Zhang, Yufeng
name: Ogita, Norio
name: Hasegawa, Takumi
name: Kitagawa, Kentaro
name: Takagi, Hidenori
name: Kim, Kee Hoon
name: Uwatoko, Yoshiya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A complex interplay of different energy scales involving Coulomb repulsion, spin-orbit coupling and Hund's coupling energy in two-dimensional (2D) van der Waals (vdW) material produces novel emerging physical state. For instance, ferromagnetism in vdW charge transfer insulator CrGeTe$_3$, that provides a promising platform to simultaneously manipulate the magnetic and electrical properties for potential device implementation using few layers thick materials. Here, we show a continuous tuning of magnetic and electrical properties of CrGeTe$_3$ single crystal using pressure. With application of pressure, CrGeTe$_3$ transforms from a FM insulator with Curie temperature, $T_{\rm{C}} \sim $ 66 K at ambient condition to a correlated 2D Fermi metal with $T_{\rm{C}}$ exceeding $\sim$ 250 K. Notably, absence of an accompanying structural distortion across the insulator-metal transition (IMT) suggests that the pressure induced modification of electronic ground states are driven by electronic correlation furnishing a rare example of bandwidth-controlled IMT in a vdW material.
description: 6 pages, 4 figures
Measurement of copolar attenuation through the bright band at 4 & 7 GHz
Creators: name: Van Der Star, Jack A.
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes an experiment designed to measure microwave propagation through the bright band at 4 and 7 GHz. The path is located approximately 100 kilometers east of Vancouver, British Columbia, Canada, forming part of the Trans Canada Telephone System microwave network. The path is coastal and mountainous in nature, 41.3 kilometers in length and experiences an average annual rainfall of 1600 mm/year. Due to these factors and an elevation differential of 1227 m between transmitting and receiving sites, the 0°C isotherm and hence bright band effect normally exist along the path from November to April. A measurement system based on remote telemetry is used to obtain high resolution and accurately time-correlated data. Received signal levels are taken from five selected 4 and 7 GHz microwave channels which are sampled at a rate of 10 Hz. Meteorological information is obtained from five locations along the path and sampled at a rate of 1 Hz. The data thus collected are then time-correlated as it arrives at the University of British Columbia (Vancouver) recording site where it is analyzed using high-level language routines developed as part of a propagation data base management system. A detailed description of both the measurement system and the data management system are provided in the thesis. Results from several precipitation systems indicate that bright band attenuation can be many times (in dB per kilometer) greater than attenuation due to equivalent amounts of rain. This is described by an Excess Attenuation Ratio (EAR) defined as the ratio of the excess attenuation in dB/km calculated using the Laws and Parson distribution at 0°C. The experimental results compare favourably with those predicted by the theoretical model of Matsumoto and Nishitsuji. A scintillation type fading phenomenon superimposed on the broad-band fade has also been observed during bright band propagation conditions. From the preliminary results this phenomenon appears to be correlated with sudden changes in differential temperature between transmitter and receiver sites and thus a corresponding change in the thickness of the bright band.
Passive Sliders and Scaling: from Cusps to Divergences
Creators: name: Nagar, Apoorva
name: Barma, Mustansir
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The steady state reached by a system of particles sliding down a fluctuating surface has interesting properties. Particle clusters form and break rapidly, leading to a broad distribution of sizes and large fluctuations. The density-density correlation function is a singular scaling function of the separation and system size. A simple mapping is shown to take a configuration of sliding hard-core particles with mutual exclusion (a system which shows a cusp singularity) to a configuration with multiparticle occupancy. For the mapped system, a calculation of the correlation function shows that it is of the same scaling form again, but with a stronger singularity (a divergence) of the sort observed earlier for noninteracting passive particles.
Supp 4: Hydrothermal alteration and elemental mass balance for the Surda Copper Deposit, Singhbhum Shear Zone, Eastern India: implications for both copper and magnetite-apatite mineralization
Creators: name: Chowdhury, Sangita
name: Lentz, David R.
name: Pal, Dipak C.
Publisher: name: Geological Society of London
Year: 2024
Subjects: classificationCode: 3705
subject: Geology
subject: FOS: Earth and related environmental sciences

description: Supplementary Fig. 1 Caption
Yield scaling, size hierarchy and fluctuations of observables in fragmentation of excited heavy nuclei
Creators: name: Neindre, N. Le
name: Bonnet, E.
name: Wieleczko, J. P.
name: Borderie, B.
name: Gulminelli, F.
name: Rivet, M. F.
name: Bougault, R.
name: Chbihi, A.
name: Dayras, R.
name: Frankland, J. D.
name: Galichet, E.
name: Guinet, D.
name: Lautesse, P.
name: Lopez, O.
name: Lukasik, J.
name: Mercier, D.
name: Moisan, J.
name: Parlog, M.
name: Rosato, E.
name: Roy, R.
name: Schwarz, C.
name: Sfienti, C.
name: Tamain, B.
name: Trautmann, W.
name: Trzcinski, A.
name: Turzo, K.
name: Vient, E.
name: Vigilante, M.
name: Zwieglinski, B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Multifragmentation properties measured with INDRA are studied for single sources produced in Xe+Sn reactions in the incident energy range 32-50 A MeV and quasiprojectiles from Au+Au collisions at 80 A MeV. A comparison for both types of sources is presented concerning Fisher scaling, Zipf law, fragment size and fluctuation observables. A Fisher scaling is observed for all the data. The pseudo-critical energies extracted from the Fisher scaling are consistent between Xe+Sn central collisions and Au quasi-projectiles. In the latter case it also corresponds to the energy region at which fluctuations are maximal. The critical energies deduced from the Zipf analysis are higher than those from the Fisher analysis.
description: 30 pages, accepted for publication in Nuclear Physics A, references corrected
Rotation and deformation of strangeon stars in the Lennard-Jones model
Creators: name: Gao, Yong
name: Lai, Xiao-Yu
name: Shao, Lijing
name: Xu, Ren-Xin
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The strong interactions at low energy scales determine the state of the supranuclear matter in the pulsar-like compact objects. It is proposed that the bulk strong matter could be composed of strangeons, which are quark clusters with a nearly equal number of three light-flavor quarks. In this work, to characterize the strong-repulsive interactions at short distances and the non-relativistic nature of the strangeons, the Lennard-Jones model is used to describe the equation of state (EoS) of strangeon stars (SSs). We investigate the static, the slowly rotating, and the tidally deformed SSs in detail. The corrections resulted from the finite surface densities are considered crucially in the perturbative approaches. We also study the universal relations between the moments of inertia, the tidal deformabilities, and the quadrupole moments. Those results are ready to be used for various purposes in astrophysics, and possible constraints from contemporary observations on the parameter space of the Lennard-Jones model are discussed. Future observations of the pulsars' radio signals, the X-ray emissions from the hot spots on the surface of the stars, and the gravitational waves (GWs) from binary mergers can give tighter constraints or even verify or falsify the existence of SSs.
description: 22 pages, 22 figures; accepted by MNRAS
Updated values of solar gravitational moments $J_{2n}$ using HMI helioseismic inference of internal rotation
Creators: name: Mecheri, Redouane
name: Meftah, Mustapha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The solar gravitational moments $J_{2n}$ are important astronomical quantities whose precise determination is relevant for solar physics, gravitational theory and high precision astrometry and celestial mechanics. Accordingly, we propose in the present work to calculate new values of $J_{2n}$ (for $n$=1,2,3,4 and 5) using recent two-dimensional rotation rates inferred from the high resolution SDO/HMI helioseismic data spanning the whole solar activity cycle 24. To this aim, a general integral equation relating $J_{2n}$ to the solar internal density and rotation is derived from the structure equations governing the equilibrium of slowly rotating stars. For comparison purpose, the calculations are also performed using rotation rates obtained from a recently improved analysis of SoHO/MDI heliseismic data for solar cycle 23. In agreement with earlier findings, the results confirmed the sensitivity of high order moments ($n>1$) to the radial and latitudinal distribution of rotation in the convective zone. The computed value of the quadrupole moment $J_{2}$ ($n=1$) is in accordance with recent measurements of the precession of Mercury's perihelion deduced from high precision ranging data of the MESSENGER spacecraft. The theoretical estimate of the related solar oblateness $Δ_{\odot}$ is consistent with the most accurate space-based determinations, particularly the one from RHESSI/SAS.
description: 6 pages, 3 figures, 1 table
Projective C*-Algebras and Boundary Maps
Creators: name: Loring, Terry A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L05, 46L85

description: Both boundary maps in K-theory are expressed in terms of surjections from projective C*-algebras to semiprojective C*-algebras.
description: Major revision to Section 3. 14 pages