cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Signature of lattice dynamics in twisted 2D homo/hetero-bilayers
Creators: name: Pan, Yang
name: Li, Shutong
name: Rahaman, Mahfujur
name: Milekhin, Ilya
name: Zahn, Dietrich R. T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Twisted 2D bilayer materials are created by artificial stacking of two monolayer crystal networks of 2D materials with a desired twisting angle $θ$. The material forms a moiré superlattice due to the periodicity of both top and bottom layer crystal structure. The optical properties are modified by lattice reconstruction and phonon renormalization, which makes optical spectroscopy an ideal characterization tool to study novel physics phenomena. Here, we report a Raman investigation on a full period of the twisted bilayer (tB) WSe$_2$ moiré superlattice (\textit i.e. 0° $\leq θ\leq$ 60°). We observe that the intensity ratio of two Raman peaks, $B_{2g}$ and $E_{2g}/A_{1g}$ correlates with the evolution of moiré period. The Raman intensity ratio as a function of twisting angle follows an exponential profile matching the moiré period with two local maxima at 0° and 60° and a minimum at 30°. Using a series of temperature-dependent Raman and photoluminescence (PL) measurements as well as \textit{ab initio} calculations, the intensity ratio $I_{B_{2g}}/I_{E_{2g}/{A_{1g}}}$ is explained as a signature of lattice dynamics in tB WSe$_2$ moiré superlattices. By further exploring different material combinations of twisted hetero-bilayers, the results are extended for all kinds of Mo- and W-based TMDCs.
description: 22 pages, 12 fugures
Additional file 1 of PeCIN8 expression correlates with flower size and resistance to yellow leaf disease in Phalaenopsis orchids
Creators: name: Wu, Yan-Jeng
name: Chen, Shu-Yun
name: Hsu, Fu-Cheng
name: Wu, Wen-Luan
name: Hsieh, Ting-Fang
name: Su, Jiunn-Feng
name: Lai, Yung-Hsiang
name: Lai, Pen-Chih
name: Chen, Wen-Huei
name: Chen, Hong-Hwa
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Plant Biology

description: Additional file 1: Supplementary Figure 1. The average DSI comparison of cultivars from all nurseries. Supplementary Figure 2. The distribution of DSI of all cultivars between two repeats. Supplementary Figure 3. The distribution of susceptibility ranks from all cultivars between two repeats. Supplementary Figure 4. The partial PAGE image reveals the banding pattern of SSR markers. Supplementary Figure 5. The flow chart of how the SSR analysis data were transformed into binomial matrix data. Supplementary Figure 6. The phylogenetic tree of 203 Phalaenopsis cultivars and other 5 orchid species.
Intermittent air invasion in pervaporating compliant microchannels
Creators: name: Keiser, Ludovic
name: Marmottant, Philippe
name: Dollet, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We explore air invasion in an initially water-filled dead-end compliant microchannel containing a constriction. The phenomenon is driven by the pervaporation of the liquid present in the channel through the surrounding medium. The penetration is intermittent, jerky, and characterised by a stop-and-go dynamics as the bubble escapes the constriction. We demonstrate that this sequence of arrest and jump of the bubble is due to an elastocapillary coupling between the air-liquid interface and the elastic medium. When the interface enters the constriction, its curvature strongly increases, leading to a depression within the liquid-filled channel which drives a compression of the channel. As the interface is forced to leave the constriction at a given threshold, due to the ongoing loss of liquid content by pervaporation, the pressure is suddenly released, which gives rise to a rapid propagation of the air bubbles away from the constriction and a restoration of the rest shape of the channel. Combining macroscopic observations and confocal imaging, we present a comprehensive experimental study of this phenomenon. In particular, the effect of the channel geometry on the time of arrest in the constriction and the jump length is investigated. Our novel microfluidic design succeeds in mimicking the role of inter-vessel pits in plants, which transiently stop the propagation of air embolism during long and severe droughts. It is expected to serve as a building block for further biomimetic studies in more complex leaf-like architectures, in order to recover this universal phenomena of intermittent propagation reported in real leaves.
description: 23 pages, 15 figures
Generalized thermalization in quantum-chaotic quadratic Hamiltonians
Creators: name: Łydżba, Patrycja
name: Mierzejewski, Marcin
name: Rigol, Marcos
name: Vidmar, Lev
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Thermalization (generalized thermalization) in nonintegrable (integrable) quantum systems requires two ingredients: equilibration and agreement with the predictions of the Gibbs (generalized Gibbs) ensemble. We prove that observables that exhibit eigenstate thermalization in single-particle sector equilibrate in many-body sectors of quantum-chaotic quadratic models. Remarkably, the same observables do not exhibit eigenstate thermalization in many-body sectors (we establish that there are exponentially many outliers). Hence, the generalized Gibbs ensemble is generally needed to describe their expectation values after equilibration, and it is characterized by Lagrange multipliers that are smooth functions of single-particle energies.
Centrality and Transverse Momentum Dependencies of Minijets and Hadrons in Au-Au Collisions
Creators: name: Zhu, Lilin
name: Hwa, Rudolph C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In the study of hadron production in Au-Au collisions at RHIC minijets play an important role in generating shower partons in the intermediate \ppt\ region. Momentum degradation of the hard and semihard partons as they traverse the inhomogeneous medium at various azimuthal angles results in a complicated convolution of geometrical, nuclear and dynamical factors that cannot usually be described in a transparent way. In this work a compact formula is found that represents the inclusive distributions of minijets of any parton type at the surface of the medium for any collision centrality. They take into account the contributions from all initiating partons created at any point in the medium. By comparing with the case of no energy loss, a ratio has been determined that is analogous to the nuclear modification factor for minijets. Phenomenological reality of such distributions is examined by calculating the hadronization of the minijets in the recombination model. Good fits of the data on pion, kaon and proton production throughout the intermediate \ppt\ region have been obtained by adjusting the parameters controlling the magnitude of the thermal partons and the degradation rates of the semihard partons. The result gives support to the minijet spectra at any centrality on the one hand, and the hadronization procedure used on the other. An important property made manifest in this study is that quarks and gluons must not lose energy in the same way because the partons form mesons and baryons differently by recombination and the momenta of quarks and gluons must be degraded at different rates in order to reproduce the experimental pion and proton spectra. This is a feature that renders invalid the notion of parton-hadron duality or other hadronization schemes based on similar ideas.
description: 28pages, 6 figures
Convergence of Fourier truncations for compact quantum groups and finitely generated groups
Creators: name: Rieffel, Marc A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: Primary 58B32, Secondary 46L87, 58B34

description: We generalize the Fejér-Riesz operator systems defined for the circle group by Connes and van Suijlekom to the setting of compact matrix quantum groups and their ergodic actions on C*-algebras. These truncations form filtrations of the containing C*-algebra. We show that when they and the containing C*-algebra are equipped with suitable quantum metrics, then under suitable conditions they converge to the containing C*-algebra for quantum Gromov-Hausdorff distance. Among other examples, our results are applicable to the quantum groups $SU_q(2)$ and their homogeneous spaces $S^2_q$.
description: 21 pages; v2 Many small improvements. No change in conclusions; v3 several references added, various minor improvements, renumbered sections. No change in conclusions
O olhar do turista britânico: História e autenticidade nas representações de Portugal nos livros de viagens, 1950-2000
Creators: name: Alves, Valentino José Carvalho Do Vale
name: Gomes, Rui Adelino Machado
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O turismo pode ser entendido como um fenómeno social multidimensional onde os livros de viagens têm um papel fundamental na estruturação da experiência turística, funcionando como mediadores entre a identidade do local e a representação de determinado espaço turístico. Utilizando como fonte os livros de viagens britânicos editados na 2ª metade do século XX, a presente investigação analisa a representação de Portugal, concentrando-se na relação entre História e Autenticidade. A nossa investigação demonstra que a fixação pelo passado é, sem dúvida, uma das marcas da representação de Portugal. Mais, os livros de viagens esforçam-se por elaborar uma interpretação da realidade que tende a maquilhar o presente de modo a preservar a sua função estética: é o culto do very typical.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Gate-controlled ultraviolet photo-etching of graphene edges
Creators: name: Mitoma, Nobuhiko
name: Nouchi, Ryo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The chemical reactivity of graphene under ultraviolet (UV) light irradiation is investigated under positive and negative gate electric fields. Graphene edges are selectively etched when negative gate voltages are applied, while the reactivity is significantly suppressed for positive gate voltages. Oxygen adsorption onto graphene is significantly affected by the Fermi level of the final state achieved during previous electrical measurements. UV irradiation after negative-to-positive gate sweeps causes predominant oxygen desorption, while UV irradiation after gate sweeps in the opposite direction causes etching of graphene edges.
description: 13 pages, 4 figures
title: Er wird mir gemüthlich schwer - dieser Antrag; [1848]
title: (Sitzung vom 28. August 1848)
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Vorlageform der Veröffentlichungsangabe: Lith Anst v Ed Gust May in Frankfurt aM
Time-dependent multistate switching of topological antiferromagnetic order in Mn$_3$Sn
Creators: name: Krishnaswamy, Gunasheel Kauwtilyaa
name: Sala, Giacomo
name: Jacot, Benjamin
name: Schlitz, Richard
name: Lambert, Charles-Henri
name: Noel, Paul
name: Gambardella, Pietro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The manipulation of antiferromagnetic order by means of spin-orbit torques opens unprecedented opportunities to exploit the dynamics of antiferromagnets in spintronic devices. In this work, we investigate the current-induced switching of the magnetic octupole vector in the Weyl antiferromagnet Mn$_3$Sn as a function of pulse shape, field, temperature, and time. We find that the switching behavior can be either bistable or tristable depending on the temporal structure of the current pulses. Time-resolved Hall effect measurements reveal that Mn$_3$Sn switching proceeds via a two-step demagnetization-remagnetization process caused by self-heating over a timescale of tens of ns followed by cooling in the presence of spin-orbit torques. Our results shed light on the switching dynamics of Mn$_3$Sn and prove the existence of extrinsic limits on its switching speed.
description: Rectified wrong order of MS and Supplement
A stable loosely-coupled scheme for cardiac electro-fluid-structure interaction
Creators: name: Bucelli, Michele
name: Gabriel, Martin Geraint
name: Gigante, Giacomo
name: Quarteroni, Alfio
name: Vergara, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We present a loosely coupled scheme for the numerical simulation of the cardiac electro-fluid-structure interaction problem, whose solution is typically computationally intensive due to the need to suitably treat the coupling of the different submodels. Our scheme relies on a segregated treatment of the subproblems, in particular on an explicit Robin-Neumann algorithm for the fluid-structure interaction, aiming at reducing the computational burden of numerical simulations. The results, both in an ideal and a realistic cardiac setting, show that the proposed scheme is stable at the regimes typical of cardiac simulations. From a comparison with a scheme with implicit fluid-structure interaction, it emerges that, while conservation properties are not fully preserved, computational times significantly benefit from the explicit scheme. Overall, the explicit discretization represents a good trade-off between accuracy and cost, and is a valuable alternative to implicit schemes for fast large-scale simulations.
Desafios e perspetivas do estudo da lealdade em destinos turísticos
Creators: name: Machado, Danielle Fernandes Costa
name: Slongo, Luiz Antônio
name: Medeiros, Mirna De Lima
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O presente ensaio teórico discute questões como as diferenças motivacionais entre turistas leais e não leais, tipologias de lealdade turística e desafios e perspetivas para novas investigações na área. O ensaio identifica cinco aspectos peculiares dos estudos na área: 1) a experiência do turista com o destino sofre interferências dos diversos prestadores de serviços envolvidos no turismo e, com isso, os atributos do destino que interferem na lealdade são multifacetados, exigindo maior atenção dos pesquisadores do setor, 2) a literatura mostra conclusões divergentes quanto ao facto de turistas leais gastarem menos dinheiro que os turistas de primeira viagem, 3) a conceção tradicional do marketing de que o processo decisório entre clientes leais e não leais é diferente não pode ser presumida no contexto turístico, 4) a revisitação não é o resultado de um processo de tomada de decisão nominal e a satisfação não conduz, necessariamente, à revisitação, 5) as motivações interpessoais, as características psicológicas e os padrões de consumo dos turistas são fatores que devem ser averiguados com mais profundidade em estudos posteriores.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Additional file 1 of Instruments to assess post-intensive care syndrome assessment: a scoping review and modified Delphi method study
Creators: name: Nakanishi, Nobuto
name: Liu, Keibun
name: Kawauchi, Akira
name: Okamura, Masatsugu
name: Tanaka, Kohei
name: Katayama, Sho
name: Mitani, Yuki
name: Ota, Kohei
name: Taito, Shunsuke
name: Fudeyasu, Kenichi
name: Masuka, Yuki
name: Yoshihiro, Shodai
name: Utsumi, Shu
name: Nishikimi, Mitsuaki
name: Masuda, Mamoru
name: Iida, Yuki
name: Kawai, Yusuke
name: Hatakeyama, Junji
name: Hifumi, Toru
name: Unoki, Takeshi
name: Kawakami, Daisuke
name: Obata, Kengo
name: Katsukawa, Hajime
name: Sumita, Hidenori
name: Morisawa, Tomoyuki
name: Takahashi, Masahiro
name: Tsuboi, Norihiko
name: Kozu, Ryo
name: Takaki, Shunsuke
name: Haruna, Junpei
name: Fujinami, Yoshihisa
name: Nosaka, Nobuyuki
name: Miyamoto, Kyohei
name: Nakamura, Kensuke
name: Kondo, Yutaka
name: Inoue, Shigeaki
name: Nishida, Osamu
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Pharmacology
Biotechnology
Environmental Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Cancer
Science Policy
Mental Health

description: Additional file 1. 1. Search strategy, 2. Summarized materials used in Delphi meeting, 3. The study included in scoping review, 4. Results of the scoping review at hospital discharge, 5. Results of the scoping review after hospital discharge. Table S1. Reference list of 754 included studies in scoping review. Table S2. Extracted PICS assessment at hospital discharge. Table S3. Extracted PICS assessment after hospital discharge.
Aplicação da regressão logística ordinal em estudos de lealdade de clientes. Evidência para a indústria hoteleira no Algarve
Creators: name: João, Isabel Maria Da Silva
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Os modelos de regressão logística ordinal têm vindo a ser utilizados na análise de dados cuja variável de resposta se apresenta em categorias com ordenação. Em estudos de satisfação de clientes é usual medir a satisfação dos mesmos, ou a recomendação do serviço a terceiros, com variáveis de natureza ordinal. Este artigo apresenta uma descrição dos modelos de regressão logística ordinal mais usados, o modelo de odds proporcionais e o modelo de odds proporcionais parciais. Apesar da existência de inúmeros estudos sobre satisfação de clientes e lealdade de clientes na indústria hoteleira, a utilização deste tipo de modelos na área é ainda reduzida. Apresentam-se os aspetos teóricos dos principais modelos de regressão logística ordinal e explicam-se as condições de utilização. A adoção deste tipo de modelos de regressão ordinal é ilustrada com um estudo empírico utilizando um conjunto de respostas de clientes de uma unidade hoteleira da região do Algarve. Foi selecionada a opção de modelação dos dados que se mostrou adequada. Como principais conclusões, de referir que quer a idade dos clientes quer a duração da estadia têm influência na sua intenção de recomendar o serviço.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Chaotic Shadows of Black Holes: A Short Review
Creators: name: Wang, Mingzhi
name: Chen, Songbai
name: Jing, Jiliang
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We give a brief review on the formation and the calculation of black hole shadow. Firstly, we introduce the conception of black hole shadow and the current works on a variety of black hole shadows. Secondly, we present main methods of calculating photon sphere radius and shadow radius, and then explain how the photon sphere affect the boundary of black hole shadow. We review the analytical calculation for black hole shadows which have analytic expressions for shadow boundary due to the integrable photon motion system. And we introduce the fundamental photon orbits which can explain the patterns of black hole shadow shape. Finally, we review the numerical calculation of black hole shadows with the backward ray-tracing method, and introduce some chaotic black hole shadows with self-similar fractal structures. Since the gravitational waves from the merger of binary black holes have been detected, we introduce a couple of shadows of binary black holes, which all have the eyebrowlike shadows around the main shadows with the fractal structures. We discuss the invariant phase space structures of photon motion system in black hole space-time, and explain the formation of black hole shadow is dominated by the invariant manifolds of certain Lyapunov orbits near the fixed points.
description: 16 Pages, 18 figures, An invited short review and accepted for publication in Commun. Theor. Phys. Some minor error in the original version are corrected
A Percepção do Turista sobre a Imagem Empresarial: um Instrumento de Estratégia Mercadológica
Creators: name: Cruz, Marília Pereira Da
name: Câmara, Michele Galdino
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O presente trabalho mostra um estudo sobre a percepção dos turistas em relação à imagem empresarial, baseando-se no conceito de pesquisadores da administração e do turismo. Aborda os indicativos, logomarca, lema, folheterias, serviços, produtos, instalações e uniformes. De forma específica, o estudo pretendeu diagnosticar a partir da percepção dos clientes, a imagem empresarial das agências de turismo como subsídio para estratégias mercadológicas. Para a elaboração do instrumento de coleta de dados foi realizado uma pesquisa quantitativa, feita por questionário. A metodologia utilizada foi de caráter exploratório e descritivo, sendo considerado um estudo de caso. A pesquisa foi aplicada com 70 clientes de uma agência de Natal/RN-Brasil, nos meses de maio a junho de 2011, e os dados obtidos por meio de questionários estruturados com perguntas fechadas utilizando a medição da escala de Likert de 7 pontos (classificando as variáveis na faixa de “discordância integral” até concordância total”). Identificou-se, na visão dos entrevistados, que a imagem é um importante fator no processo de decisão de compra, tornando-a um importante instrumento de estratégia mercadológica.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Scattering polarization in solar flares
Creators: name: Stepan, Jiri
name: Heinzel, Petr
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: There is an ongoing debate about the origin and even the very existence of a high degree of linear polarization of some chromospheric spectral lines observed in solar flares. The standard explanation of these measurements is in terms of the impact polarization caused by non-thermal proton and/or electron beams. In this work, we study the possible role of resonance line polarization due to radiation anisotropy in the inhomogeneous medium of the flare ribbons. We consider a simple two-dimensional model of the flaring chromosphere and we solve self-consistently the non-LTE problem taking into account the role of resonant scattering polarization and of the Hanle effect. Our calculations show that the horizontal plasma inhomogeneities at the boundary of the flare ribbons can lead to a significant radiation anisotropy in the line formation region and, consequently, to a fractional linear polarization of the emergent radiation of the order of several percent. Neglecting the effects of impact polarization, our model can provide a clue for resolving some of the common observational findings, namely: (1) why a high degree of polarization appears mainly at the edges of the flare ribbons; (2) why polarization can also be observed during the gradual phase of a flare; (3) why polarization is mostly radial or tangential. We conclude that the radiation transfer in the realistic multi-dimensional models of solar flares needs to be considered as an essential ingredient for understanding the observed spectral line polarization.
description: Accepted for publication in The Astrophysical Journal Letters
title: Sonst. Jetzt. (oder alte und neue Cavallerie.); [1848?]
title: Michel, der kräftige Bursche wurde gar lange Zeit als gemüthliches Reitpferd benutzt; er trug in stiller Demuth und entsetzlicher Ergebenheit seine mannigfachen hohen Reiter und wagte nie auszuschlagen; ...
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Text überwiegend in deutscher Kurrentschrift
Measurements of cosmic expansion and growth rate of structure from voids in the Sloan Digital Sky Survey between redshift 0.07 and 1.0
Creators: name: Woodfinden, Alex
name: Nadathur, Seshadri
name: Percival, Will J.
name: Radinović, Slađana
name: Massara, Elena
name: Winther, Hans A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present measurements of the anisotropic cross-correlation of galaxies and cosmic voids in data from the Sloan Digital Sky Survey Main Galaxy Sample (MGS), Baryon Oscillation Spectroscopic Survey (BOSS) and extended BOSS (eBOSS) luminous red galaxy catalogues from SDSS Data Releases 7, 12 and 16, covering the redshift range $0.07
description: Author's accepted manuscript. 17 Pages, 8 Figures. MNRAS (2022)
Estudos críticos em turismo: a comunicação turística e o mito da democracia racial no Brasil
Creators: name: Hintze, Helio
name: Júnior, Almeida
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O presente estudo tem como objetivo apresentar e desdobrar hipóteses sobre a comunicação do turismo no Brasil, com foco específico nas diferenças quanto à representação dos papéis de brancos e negros no turismo. Sua metodologia é baseada na análise de conteúdo de uma massa de dados obtida de uma importante revista brasileira sobre turismo, e se estende numa análise crítica de discurso do material coletado. A relevância do presente trabalho é a de propor o desenvolvimento de estudos críticos sobre os temas “turismo” e “racismo” no Brasil. Neste país há o mito da democracia racial, no entanto, tal discurso apresenta fragilidades. A partir das análises do material coletado, constatamos uma quase exclusividade na representação do turista como sendo branco. No caso dos negros, seu papel como turista é mínimo, no entanto, via de regra, o negro é apresentado como servidor do turismo ou atrativo turístico.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Plunging Breakers - Part 1. Analysis of an Ensemble of Wave Profiles
Creators: name: Erinin, Martin A.
name: Liu, Xinan
name: Wang, Sophie D.
name: Duncan, James H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: An experimental study of the dynamics and droplet production in three mechanically generated plunging breaking waves is presented in this two-part paper. In the present paper (Part 1), the dynamics of the three breakers are studied through measurements of the evolution of their free surface profiles during 10 repeated breaking events for each wave. The waves are created from dispersively focused wave packets which are generated by a highly accurate programmable wave maker. The wave maker motions that create the three breakers differ primarily only by small changes in their overall amplitude. Breaker profiles are measured with a cinematic laser induced fluorescence technique covering a streamwise region of approximately one breaker wavelength and over a time of 2.6 breaker periods. The 10 repeated sets of breaker profiles are spatially and temporally aligned to the location and time of jet impact. The aligned profile data is used to create spatio-temporal maps of the ensemble average surface height and the standard deviation of both the local normal distance and the local arc length relative to the instantaneous mean profile. It is found that the mean and standard deviation maps contain strongly correlated localized features and indicate that the transition from laminar to turbulent flow is a highly repeatable process. Regions of high standard deviation include the splash created by the plunging jet impact and subsequent splash impacts at the front of the breaking region as well as the site where the air pocket entrained under the plunging jet at the moment of jet tip impact comes to the surface and pops on the back face of the wave. In Part 2, these features are used to interpret various features of the distributions of droplet number, diameter and velocity.
NN-EUCLID: deep-learning hyperelasticity without stress data
Creators: name: Thakolkaran, Prakash
name: Joshi, Akshay
name: Zheng, Yiwen
name: Flaschel, Moritz
name: De Lorenzis, Laura
name: Kumar, Siddhant
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: We propose a new approach for unsupervised learning of hyperelastic constitutive laws with physics-consistent deep neural networks. In contrast to supervised learning, which assumes the availability of stress-strain pairs, the approach only uses realistically measurable full-field displacement and global reaction force data, thus it lies within the scope of our recent framework for Efficient Unsupervised Constitutive Law Identification and Discovery (EUCLID) and we denote it as NN-EUCLID. The absence of stress labels is compensated for by leveraging a physics-motivated loss function based on the conservation of linear momentum to guide the learning process. The constitutive model is based on input-convex neural networks, which are capable of learning a function that is convex with respect to its inputs. By employing a specially designed neural network architecture, multiple physical and thermodynamic constraints for hyperelastic constitutive laws, such as material frame indifference, (poly-)convexity, and stress-free reference configuration are automatically satisfied. We demonstrate the ability of the approach to accurately learn several hidden isotropic and anisotropic hyperelastic constitutive laws - including e.g., Mooney-Rivlin, Arruda-Boyce, Ogden, and Holzapfel models - without using stress data. For anisotropic hyperelasticity, the unknown anisotropic fiber directions are automatically discovered jointly with the constitutive model. The neural network-based constitutive models show good generalization capability beyond the strain states observed during training and are readily deployable in a general finite element framework for simulating complex mechanical boundary value problems with good accuracy.
description: 31 pages, 17 figures
Burchnall-Chaundy polynomials for matrix ODOs and Picard-Vessiot Theory
Creators: name: Previato, Emma
name: Rueda, Sonia L.
name: Zurro, Maria-Angeles
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: I.1.2
subject: 13N10, 13P15, 14H70

description: Burchnall and Chaundy showed that if two ODOs $P$, $Q$ with analytic coefficients commute there exists a polynomial $f(λ,μ)$ with complex coefficients such that $f(P,Q)=0$, called the BC-polynomial. This polynomial can be computed using the differential resultant for ODOs. In this work we extend this result to matrix ordinary differential operators, MODOs. Matrices have entries in a differential field $K$, whose field of constants $C$ is algebraically closed and of zero characteristic. We restrict to the case of order one operators $P$, with invertible leading coefficient. A new differential elimination tool is defined, the matrix differential resultant. It is used to compute the BC-polynomial $f$ of a pair of commuting MODOs and proved to have constant coefficients. This resultant provides the necessary and sufficient condition for the spectral problem $PY=λY \ , \ QY=μY$ to have a solution. Techniques from differential algebra and Picard-Vessiot theory allow us to describe explicitly isomorphisms between commutative rings of MODOs $C[P,Q]$ and a finite product of rings of irreducible algebraic curves.
Optical appearance of a thin-shell wormhole with a Hayward profile
Creators: name: Guo, Sen
name: Li, Guan-Ru
name: Liang, En-Wei
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The optical properties of a thin-shell wormhole (TSW) with a Hayward profile is investigated. Adopting the ray-tracing method, we demonstrate that the TSW's contralateral spacetime is capable of reflecting a significant portion of light back to the observer spacetime. We analyze the effective potential, light deflection, and azimuthal angle of the TSW and find that these quantities are affected by the mass ratio of the black holes (BHs). Specifically, if the mass of the contralateral spacetime BH is greater than that of the original spacetime BH, and the impact parameter satisfies the condition $Hb_{\rm c2}
description: 12 pages, 8 figures
Er wiegt mehr, als sie alle!; [1848]
Creators: name: Lanzedelly, Josef
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Vorlageform der Veröffentlichungsangabe: Ausschließende Vervielfältigung vorbehalten A. Paterno's We. & Sohn in Wien. Ged. b. J. Höfelich
Marketing relacional no setor turístico alentejano
Creators: name: Silva, Sónia Isabel Duarte Da
name: Marreiros, Cristina Isabel Galamba Oliveira Costa
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Este artigo centra-se na avaliação do impacto das diferentes estratégias e ações do Marketing Relacional na fidelização dos clientes das empresas do setor turístico alentejano. Este setor encontra-se em crescente desenvolvimento e é necessário, cada vez mais, assegurar a competitividade das empresas, adotando estratégias capazes de fidelizar clientes. Os resultados indicaram que as empresas em estudo têm, ainda, um longo caminho a percorrer no que concerne à gestão da relação com os seus clientes e à utilização das estratégias e técnicas do Marketing Relacional. Existe uma preocupação com os serviços que são prestados ao cliente, o que não é, por si só, suficiente para fidelizar os clientes. É necessário trabalhar as relações, de forma a serem criados laços duradouros que levem à fidelização de clientes.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Drei deutsche Professoren entwerfen den Entwurf des Entwurfs für die Verfassung des deutschen Reichshe[e]res; [1848]
Creators: name: Boddien, Alfons von
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Vorlageform der Veröffentlichungsangabe: Lith Anst v Ed Gust May von Frankfurt aM
Calibration of Transition-edge Sensor (TES) Bolometer Arrays with Application to CLASS
Creators: name: Appel, John W.
name: Bennett, Charles L.
name: Brewer, Michael K.
name: Bustos, Ricardo
name: Chan, Manwei
name: Chuss, David T.
name: Cleary, Joseph
name: Couto, Jullianna D.
name: Dahal, Sumit
name: Datta, Rahul
name: Denis, Kevin
name: Eimer, Joseph
name: Essinger-Hileman, Thomas
name: Harrington, Kathleen
name: Iuliano, Jeffrey
name: Li, Yunyang
name: Marriage, Tobias A.
name: Núñez, Carolina
name: Osumi, Keisuke
name: Padilla, Ivan L.
name: Petroff, Matthew A.
name: Rostem, Karwan
name: Valle, Deniz A. N.
name: Watts, Duncan J.
name: Weiland, Janet L.
name: Wollack, Edward J.
name: Xu, Zhilei
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The current and future cosmic microwave background (CMB) experiments fielding kilo-pixel arrays of transition-edge sensor (TES) bolometers require accurate and robust gain calibration methods. We simplify and refactor the standard TES model to directly relate the detector responsivity calibration and optical time constant to the measured TES current $I$ and the applied bias current $I_{\mathrm{b}}$. The calibration method developed for the Cosmology Large Angular Scale Surveyor (CLASS) TES bolometer arrays relies on current versus voltage ($I$-$V$) measurements acquired daily prior to CMB observations. By binning Q-band (40GHz) $I$-$V$ measurements by optical loading, we find that the gain calibration median standard error within a bin is 0.3%. We test the accuracy of this "$I$-$V$ bin" detector calibration method by using the Moon as a photometric standard. The ratio of measured Moon amplitudes between detector pairs sharing the same feedhorn indicates a TES calibration error of 0.5%. We also find that for the CLASS Q-band TES array, calibrating the response of individual detectors based solely on the applied TES bias current accurately corrects TES gain variations across time but introduces a bias in the TES calibration from data counts to power units. Since the TES current bias value is set and recorded before every observation, this calibration method can always be applied to raw TES data and is not subject to $I$-$V$ data quality or processing errors.
description: 19 pages, 7 figures, 5 tables. Submitted to ApJS May 2022. Published ApJS Oct 2022
Computing non-equilibrium trajectories by a deep learning approach
Creators: name: Simonnet, Eric
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Predicting the occurence of rare and extreme events in complex systems is a well-known problem in non-equilibrium physics. These events can have huge impacts on human societies. New approaches have emerged in the last ten years, which better estimate tail distributions. They often use large deviation concepts without the need to perform heavy direct ensemble simulations. In particular, a well-known approach is to derive a minimum action principle and to find its minimizers. The analysis of rare reactive events in non-equilibrium systems without detailed balance is notoriously difficult either theoretically and computationally. They are described in the limit of small noise by the Freidlin-Wentzell action. We propose here a new method which minimizes the geometrical action instead using neural networks: it is called deep gMAM. It relies on a natural and simple machine-learning formulation of the classical gMAM approach. We give a detailed description of the method as well as many examples. These include bimodal switches in complex stochastic (partial) differential equations, quasi-potential estimates, and extreme events in Burgers turbulence.
Eigenvalue problem for radial potentials in space with SU(2) fuzziness
Creators: name: Mirahmadi, Marjan-S.
name: Fatollahi, Amir H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The eigenvalue problem for radial potentials is considered in a space whose spatial coordinates satisfy the SU(2) Lie algebra. As the consequence, the space has a lattice nature and the maximum value of momentum is bounded from above. The model shows interesting features due to the bound, namely, a repulsive potential can develop bound-states, or an attractive region may be forbidden for particles to propagate with higher energies. The exact radial eigen-functions in momentum space are given by means of the associated Chebyshev functions. For the radial stepwise potentials the exact energy condition and the eigen-functions are presented. For a general radial potential it is shown that the discrete energy spectrum can be obtained in desired accuracy by means of given forms of continued fractions.
description: 1+20 pages, 2 figs, LaTeX
Sir Robert ergreift die dargereichte Bruderhand. In Folge dessen lösst sich sofort die ganze französische Armee auf; [1848]
Creators: name: Boddien, Alfons von
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Flugblatt mit Karikatur des Abgeordneten der Frankfurter Nationalversammlung Robert Blum und dem französischen General Eugèn Cavaignac
Overlapping modularity at the critical point of k-clique percolation
Creators: name: Toth, Balint
name: Vicsek, Tamas
name: Palla, Gergely
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: One of the most remarkable social phenomena is the formation of communities in social networks corresponding to families, friendship circles, work teams, etc. Since people usually belong to several different communities at the same time, the induced overlaps result in an extremely complicated web of the communities themselves. Thus, uncovering the intricate community structure of social networks is a non-trivial task with great potential for practical applications, gaining a notable interest in the recent years. The Clique Percolation Method (CPM) is one of the earliest overlapping community finding methods, which was already used in the analysis of several different social networks. In this approach the communities correspond to k-clique percolation clusters, and the general heuristic for setting the parameters of the method is to tune the system just below the critical point of k-clique percolation. However, this rule is based on simple physical principles and its validity was never subject to quantitative analysis. Here we examine the quality of the partitioning in the vicinity of the critical point using recently introduced overlapping modularity measures. According to our results on real social- and other networks, the overlapping modularities show a maximum close to the critical point, justifying the original criteria for the optimal parameter settings.
description: 20 pages, 6 figures
O Marketing Turístico Sustentável orientado para as Comunidades Locais: o Polo de Desenvolvimento Turístico da Serra da Estrela
Creators: name: Costa, Inês Elias Da
name: Pereira, Hélia Gonçalves
name: Patuleia, Mafalda
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Este trabalho pretende explorar o marketing dos destinos turísticos que se rejam pelos princípios da sustentabilidade, com enfoque na vertente sociocultural deste modelo de desenvolvimento, implicando o envolvimento das comunidades locais. A investigação incidiu no Polo de Desenvolvimento Turístico da Serra da Estrela, na qual se procurou avaliar as opiniões dos residentes face à atividade turística, bem como a sua predisposição para se envolverem num futuro plano de marketing turístico para a região. Deste modo, os resultados obtidos revelam que a maioria dos residentes da região têm perceções e opiniões positivas face ao turismo, independentemente de trabalharem ou não na atividade. Em relação aos turistas, estes são bem aceites pela comunidade que, por seu lado, demonstra ainda vontade de participar nas decisões de desenvolvimento turístico local, permitindo, assim, reunir condições para o seu envolvimento num plano de marketing turístico sustentável.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
A identidade nacional e a projeção da imagem do Brasil
Creators: name: Silveira, Lélian Patrícia De Oliveira
name: Baptista, Maria Manuel Rocha Teixeira
name: Halim, Isis
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O Brasil esteve, por séculos, vinculado a estereótipos relacionados ao exótico e ao paradisíaco, como se tais conceitos fossem suficientes para abarcar todas as características e valores do País. Ainda hoje, defronta-se com as consequências de tal distorção, apesar das recentes iniciativas do Estado, representado pelo Ministério do Turismo e pelo Instituto Brasileiro de Turismo, EMBRATUR, no sentido de apresentar outros e diferentes atributos que melhor descrevem o Brasil. A construção do presente estudo seguiu o método exploratório e estrutura-se a partir da contribuição da identidade nacional para formação da imagem do país e, posteriormente, a imagem projetada pelas campanhas institucionalizadas, filmes, e outra formas de arte, que contribuíram para ratificação de estereótipos.
description: Revista Turismo & Desenvolvimento, vol. 1 n.º 17/18 (2012)
Additional file 1 of Work stressors, work-family conflict, parents’ depressive symptoms and perceived parental concern for their children’s mental health during COVID-19 in Canada: a cross-sectional analysis
Creators: name: Bilodeau, Jaunathan
name: Quesnel-Vallée, Amélie
name: Poder, Thomas
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Environmental Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Mental Health

description: Additional file 1.
Efficient moment-based approach to the simulation of infinitely many heterogeneous phase oscillators
Creators: name: León, Iván
name: Pazó, Diego
Publisher: name: arXiv
Year: 2022
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: The dynamics of ensembles of phase oscillators are usually described considering their infinite-size limit. In practice, however, this limit is fully accessible only if the Ott-Antonsen theory can be applied, and the heterogeneity is distributed following a rational function. In this work we demonstrate the usefulness of a moment-based scheme to reproduce the dynamics of infinitely many oscillators. Our analysis is particularized for Gaussian heterogeneities, leading to a FourierHermite decomposition of the oscillator density. The Fourier-Hermite moments obey a set of hierarchical ordinary differential equations. As a preliminary experiment, the effects of truncating the moment system and implementing different closures are tested in the analytically solvable Kuramoto model. The moment-based approach proves to be much more efficient than the direct simulation of a large oscillator ensemble. The convenience of the moment-based approach is exploited in two illustrative examples: (i) the Kuramoto model with bimodal frequency distribution, and (ii) the 'enlarged Kuramoto model' (endowed with nonpairwise interactions). In both systems we obtain new results inaccessible through direct numerical integration of populations.
description: 12 pages, 9 figures
Jrrlichter; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Flugblatt mit Karikatur der Abgeordneten der Frankfurter Nationalversammlung Heinrich von Gagern (mit Schmetterlingsnetz), Alexander von Soiron (mit Zylinder), die in der Art von Insektensammlern auf der Jagd nach Orden und Geldsäcken befinden, die jedoch nur "Irrlichter" sind. Andere Abgeordnete versinken bereits im Sumpf der Korruption. (Quelle: Stadtarchiv Mainz)