cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MHD Shock-Clump Evolution with Self-Contained Magnetic Fields
Creators: name: Li, Shule
name: Frank, Adam
name: Blackman, Eric G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We study the interaction of strong shock waves with magnetized clumps. Previous numerical work focused on the simplified scenario in which shocked clumps are immersed in a globally uniform magnetic field that extends through both the clump and the ambient medium. Here we consider the complementary circumstance in which the field is completely self-contained within the clumps. This could arise naturally during clump formation via dynamical or thermal instabilities for example as magnetic field pinches off from the ambient medium. Using our AMR MHD code AstroBEAR, we carry out a series of simulations with magnetized clumps that have different self-contained magnetic field configurations. We find that the clump and magnetic evolution are sensitive to the fraction of magnetic field aligned with versus perpendicular to the shock normal. The relative strength of magnetic pressure and tension in the different field configurations allows us to analytically understand the different cases of post-shock evolution. We also show how turbulence and the mixing it implies depends of the initial field configuration and suggest ways in which observed shock-clump morphology may be used as a proxy for identifying internal field topologies a posteriori.
description: 36 pages, 16 figures. ApJ, accepted
MPEC 2023-V108 : COMET P/2023 V2 (PANSTARRS)
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: COMET P/2023 V2 (PANSTARRS)

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Ich bewege mich, wie sie sehen meine Herren, rein auf dem historischen Rechtsboden; [1848]
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Nicht identisch mit BV043494843. Dort z.B. "Herrn", hier "Herren"
Praia do Francês: o espaço do turismo – Alagoas-Brasil
Creators: name: Martins, Elizabeth C.
name: Filho, Rodrigo Ramalho
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: A nova forma de turismo, em oposição às anteriormente desenvolvidas, aliada à eclosão de movimentos ambientais, vem contribuindo para um maior questionamento das atuais práticas de turismo desenvolvidas, dissociadas da realidade local, responsáveis pela degradação ambiental, social, econômica e cultural das áreas onde são realizadas. Essas práticas, nitidamente detectadas numa região costeira de grande atratividade no litoral do Estado de Alagoas – a Praia do Francês –, objeto de estudo deste trabalho, cuja beleza e diversidade de recursos vêm durante anos sendo palco de ações hegemônicas, dentre elas o turismo convencional ou de massa que, devido à sua rapidez, agridem e degradam esse rico e importante ecossistema, transformando um lugar vivido e percebido em um espaço efêmero. O presente artigo constitui uma análise sobre o domínio do turismo na Praia do Francês, caracterizando as atuais mudanças que afetam a comunidade e os ecossistemas, questionando o seu destino e apontando as principais tendências.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
title: Core-Mantle coupling
title: Part III: gravitational coupling torques
titleType: Subtitle
Creators: name: Hagedoorn, Jan M.
name: Greiner-Mai, Hans
name: Ballani, Ludwig
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2012

description: Scientific Technical Report STR; 12/01; ISSN 1610-0956
Theoretical evaluation of solar proton-proton fusion reaction rate and its uncertainties
Creators: name: De-Leon, Hilla
name: Gazit, Doron
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The weak proton-proton fusion into a deuteron ($^2$H) is the driving reaction in the energy production in the Sun, as well as similar main sequence stars. Its reaction rate in the solar interior is determined only theoretically. Here, we provide a new determination of the rate of this reaction in solar conditions $S^{11}(0)$, and analyze theoretical and experimental sources for uncertainties, using effective field theory of quantum chromo-dynamics without explicit pions at next-to-leading order. We find an enhancement of $S^{11}$ by $1-4\%$ over the previously recommended value. This change reduces the calculated fluxes of neutrinos originating in $^8$B and $^7$Be nuclear reactions in the Sun, thus favoring higher abundances for metallic photospheric elements, in the tension between different composition determination, known as the ``Solar Composition Problem''.
description: 9 pages, 3 figures
title: GFZ GRACE Level-2 Processing Standards Document for Level-2 Product Release 0005
Creators: name: Dahle, Christoph
name: Flechtner, Frank
name: Gruber, Christian
name: Koenig, Daniel
name: Koenig, Rolf
name: Michalak, Grzegorz
name: Neumayer, Karl-Hans
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2012

description: Scientific Technical Report - Data; 12/02; ISSN 1610-0956
Detecting Shortcut Learning for Fair Medical AI using Shortcut Testing
Creators: name: Brown, Alexander
name: Tomasev, Nenad
name: Freyberg, Jan
name: Liu, Yuan
name: Karthikesalingam, Alan
name: Schrouff, Jessica
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Machine learning (ML) holds great promise for improving healthcare, but it is critical to ensure that its use will not propagate or amplify health disparities. An important step is to characterize the (un)fairness of ML models - their tendency to perform differently across subgroups of the population - and to understand its underlying mechanisms. One potential driver of algorithmic unfairness, shortcut learning, arises when ML models base predictions on improper correlations in the training data. However, diagnosing this phenomenon is difficult, especially when sensitive attributes are causally linked with disease. Using multi-task learning, we propose the first method to assess and mitigate shortcut learning as a part of the fairness assessment of clinical ML systems, and demonstrate its application to clinical tasks in radiology and dermatology. Finally, our approach reveals instances when shortcutting is not responsible for unfairness, highlighting the need for a holistic approach to fairness mitigation in medical AI.
10 Inventions on collapsible keyboards: A TRIZ based analysis
Creators: name: Mishra, Umakant
Publisher: name: arXiv
Year: 2013
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Although a bigger keyboard is often comfortable to work with, they cannot be fit into laptop and small size computer boxes. The portable and handheld computers need small size keyboards. So there is a need to reduce the size of the keyboard to fit into the laptop box. There are various mechanisms to reduce the size of the keyboard; collapsible keyboard is one of them. Although different inventions intend to achieve the same objective of reducing the keyboard size, they all differ in their mechanism. For example, some invention uses a compression mechanism, some invention uses a folding mechanism, and some invention uses a collapsing mechanism and so on. This article illustrates 10 inventions on collapsible keyboards from US patent database. Each case is analyzed from a TRIZ perspective.
description: Published in TRIZsite Journal, March 2005, also available in http://papers.ssrn.com/abstract=932268. arXiv admin note: text overlap with arXiv:1310.3070
Sensitivity-enhanced generalized polynomial chaos for efficient uncertainty quantification
Creators: name: Kantarakias, Kyriakos D.
name: Papadakis, George
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Spectral Theory (math.SP)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present an enriched formulation of the Least Squares (LSQ) regression method for Uncertainty Quantification (UQ) using generalised polynomial chaos (gPC). More specifically, we enrich the linear system with additional equations for the gradient (or sensitivity) of the Quantity of Interest with respect to the stochastic variables. This sensitivity is computed very efficiently for all variables by solving an adjoint system of equations at each sampling point of the stochastic space. The associated computational cost is similar to one solution of the direct problem. For the selection of the sampling points, we apply a greedy algorithm which is based on the pivoted QR decomposition of the measurement matrix. We call the new approach sensitivity-enhanced generalised polynomial chaos, or se-gPC. We apply the method to several test cases to test accuracy and convergence with increasing chaos order, including an aerodynamic case with $40$ stochastic parameters. The method is found to produce accurate estimations of the statistical moments using the minimum number of sampling points. The computational cost scales as $\sim m^{p-1}$, instead of $\sim m^p$ of the standard LSQ formulation, where $m$ is the number of stochastic variables and $p$ the chaos order. The solution of the adjoint system of equations is implemented in many computational mechanics packages, thus the infrastructure exists for the application of the method to a wide variety of engineering problems.
Helical multiferroics for electric field controlled quantum information processing
Creators: name: Azimi, M.
name: Chotorlishvili, L.
name: Mishra, S. K.
name: Greschner, S.
name: Vekua, T.
name: Berakdar, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetoelectric coupling in helical multiferroics allows to steer spin order with electric fields. Here we show theoretically that in a helical multiferroic chain quantum information processing as well as quantum phases are highly sensitive to electric (E) field. Applying E-field, the quantum state transfer fidelity can be increased and made directionally dependent. We also show that E field transforms the spin-density-wave/nematic or multipolar phases of frustrated ferromagnetic spin-1/2 chain in chiral phase with a strong magnetoelectric coupling. We find sharp reorganization of the entanglement spectrum as well as a large enhancement of fidelity susceptibility at Ising quantum phase transition from nematic to chiral states driven by electric field. These findings point to a new tool for quantum information with low power consumption.
description: 7 pages
Gravitational wave birefringence in spatially curved teleparallel cosmology
Creators: name: Hohmann, Manuel
name: Pfeifer, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study tensor perturbations around the most general cosmologically symmetric backgrounds in a class of teleparallel gravity theories known as New General Relativity. These theories comprise a one-parameter class, which is fully consistent with observations at the post-Newtonian level, and which contains the teleparallel equivalent of General Relativity as a special case. We find that for a particular class of cosmological background geometries these theories exhibit gravitational wave birefringence and dispersion, i.e., the dispersion relation for gravitational waves depends on their polarization and wave number. The strength of this effect is directly related to the spatial curvature of the cosmological background and the parameter describing the deviation of the theory from General Relativity. We discuss the possibility of observing this effect in gravitational wave experiments.
description: 6 pages, no figures, updated to published version
Relativistic ring models
Creators: name: Ujevic, M.
name: Letelier, P. S.
name: Vogt, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Relativistic thick ring models are constructed using previously found analytical Newtonian potential-density pairs for flat rings and toroidal structures obtained from Kuzmin-Toomre family of discs. In particular, we present systems with one ring, two rings and a disc with a ring. Also, the circular velocity of a test particle and its stability when performing circular orbits are presented in all these models. In general, we find that regions of non-stability appear between the rings when they become thinner.
description: 13 pages, 6 figures
Gastos turísticos: um método estrutural para a composição dos gastos nos destinos turísticos
Creators: name: Ceretta, Caroline Ciliane
name: Jasper, Juliana Rose
name: Santos, Nara Rejane Zamberlan Dos
name: Rocha, Jefferson Marçal
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O estudo dos gastos turísticos nos destinos continua sendo uma alternativa para identificar o consumo turístico efetivo. No entanto, a complexidade das variáveis que compõem os gastos é um fator limitador na escolha do método. Assim, buscou-se apresentar um estudo da metodologia utilizada para a composição dos gastos turísticos nos municípios de Canela e Gramado no Sul do Brasil. A coleta de dados valeu-se da criação de um novo questionário estruturado para identificar as características socioeconômicas, da viagem e compor os gastos turísticos diários individuais. Como resultado, o gasto turístico diário foi identificado em sete variáveis de consumo: hospedagem, alimentação, entretenimento, agenciamento, transporte, compras e outros gastos. No estudo, a maioria dos turistas são mulheres, casadas, trabalhadoras do comércio, que viajam de automóvel próprio, em família e permanecem até quatro dias no destino. Por fim, a estrutura metodológica apresentada identificou um procedimento estatístico complexo, capaz de retratar os efeitos econômicos e os impactos financeiros do turismo, tão significativo para investimentos, estratégias mercadológicas e a gestão de um destino.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
Fatores que Influenciam a forma como os Hotéis Respondem às Reclamações dos Clientes
Creators: name: Moutinho, Victor Manuel F.
name: Guardado, Marta
name: Miranda, Ana Paula S.
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Empresas que oferecem serviços em geral, e serviços hoteleiros em particular, devem centrar a sua atenção na prestação de um serviço de qualidade e orientar os seus vetores estratégicos para o cliente satisfeito, de forma a garantir e manter um portfolio de clientes leais e rentáveis. No entanto, devido às características peculiares que distinguem serviços de bens, as falhas são eventos inerentes em encontros de serviço, constituindo um continuum as preocupações em recuperar essas falhas / reclamações. O objetivo deste artigo é expor, de forma teórica, quais os fatores organizacionais que a indústria hoteleira deve ter em consideração, para responder às reclamações apresentadas pelos seus clientes, bem como, qual o impacte destes fatores na satisfação, na intenção de recompra, no word-of-mouth e nas intenções de reclamações futuras dos clientes. Mais precisamente, foram tidas em consideração variáveis como: o Comprometimento e Foco no Cliente; o Preconceito em Relação às Reclamações; a Compreensão da Importância da Gestão de Reclamações; a Estrutura Organizacional; os Sistemas, as Políticas e os Procedimentos de Gestão de Reclamações e os Recursos Humanos, e foi mencionado qual o seu possível contributo para a formulação das respostas dadas pelas empresas aos clientes que reclamam. Posteriormente foi descrito como é que respostas organizacionais às reclamações e a justiça organizacional influenciam a Satisfação dos Clientes, e os consequentes impactes na Intenção de Recompra, Word-of-mouth e Intenções de Reclamações Futuras, decorrentes da satisfação após ocorrer uma falha de serviço e resultante recuperação.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
High Order Robust Adaptive Control Barrier Functions and Exponentially Stabilizing Adaptive Control Lyapunov Functions
Creators: name: Cohen, Max H.
name: Belta, Calin
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: Robotics (cs.RO)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper studies the problem of utilizing data-driven adaptive control techniques to guarantee stability and safety of uncertain nonlinear systems with high relative degree. We first introduce the notion of a High Order Robust Adaptive Control Barrier Function (HO-RaCBF) as a means to compute control policies guaranteeing satisfaction of high relative degree safety constraints in the face of parametric model uncertainty. The developed approach guarantees safety by initially accounting for all possible parameter realizations but adaptively reduces uncertainty in the parameter estimates leveraging data recorded online. We then introduce the notion of an Exponentially Stabilizing Adaptive Control Lyapunov Function (ES-aCLF) that leverages the same data as the HO-RaCBF controller to guarantee exponential convergence of the system trajectory. The developed HO-RaCBF and ES-aCLF are unified in a quadratic programming framework, whose efficacy is showcased via two numerical examples that, to our knowledge, cannot be addressed by existing adaptive control barrier function techniques.
description: Accepted to the 2022 American Control Conference
Music containing violent themes: from curiosity to passion
Creators: name: Powell, Merrick
Publisher: name: Macquarie University
Year: 2023
Subjects: classificationCode: 520403
subject: Learning, motivation and emotion

description: Many people enthusiastically engage with aggressive-sounding music that contains explicitly violent lyrics. What can account for these inclinations? The present thesis investigated the psychological well-being outcomes from music engagement in passionate fans of violently themed music, as well as potential factors that may facilitate initial and sustained engagement with violently themed music. Three different studies were conducted. Chapter 2 investigated the role of two types of passion, harmonious and obsessive passion, on the outcomes of passionate engagement with music. Chapter 3 aimed to understand the role of morbid curiosity as a factor that facilitates the initial attraction to music containing violent themes. Chapter 4 investigated the overt motivations that music fans have for engaging with music, by developing the Hedonic and Eudaimonic Motivation for Music Scale (HEMM). The results of Chapter 2 revealed that harmonious passion for music is associated with psychological well-being, and obsessive passion for music is associated with psychological ill-being, in fans of both violently and non-violently themed music. Chapter 3 revealed that morbid curiosity was associated with the consumption and enjoyment of genres commonly containing violent themes in a sample of fans and non-fans, as well as the inclination to engage further with novel excerpts of violently themed music in a sample of predominantly non-fans. Finally, Chapter 4 validated the HEMM. Chapter 4’s series of studies revealed that while fans of all music exhibit high levels of both motivations, fans of violently themed music exhibited greater eudaimonic and lower hedonic motivations for engaging with music compared to fans of non-violently themed music. Overall, the results across the thesis support the proposed notion that morbid curiosity and both hedonic and eudaimonic motivations underpin the initial and ongoing engagement with violently themed music. Further, such engagement can lead to the development of passionate fandom, which can facilitate a range of benefits including psychological well-being when fandom is harmonious. A model detailing the process from initial engagement to adaptive outcomes from engagement with violently themed music is proposed and discussed.
Mediated interactions between ions in quantum degenerate gases
Creators: name: Ding, Shanshan
name: Drewsen, Michael
name: Arlt, Jan J.
name: Bruun, G. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We explore the interaction between two trapped ions mediated by a surrounding quantum degenerate Bose or Fermi gas. Using perturbation theory valid for weak atom-ion interaction, we show analytically that the interaction mediated by a Bose gas has a power-law behaviour for large distances whereas it has a Yukawa form for intermediate distances. For a Fermi gas, the mediated interaction is given by a power-law for large density and by a Ruderman-Kittel-Kasuya-Yosida form for low density. For strong atom-ion interactions, we use a diagrammatic theory to demonstrate that the mediated interaction can be a significant addition to the bare Coulomb interaction between the ions, when an atom-ion bound state is close to threshold. Finally, we show that the induced interaction leads to substantial and observable shifts in the ion phonon frequencies.
description: main text: 5 pages, 4 figures. Supplemental materials: 6 pages, 5 figures
Community-based models of care facilitating the recovery of people living with persistent and complex mental health needs: a systematic review and narrative synthesis
Creators: name: Harvey, Carol
name: Zirnsak, Tessa-May
name: Brasier, Catherine
name: Ennals, Priscilla
name: Fletcher, Justine
name: Hamilton, Bridget
name: Killaspy, Helen
name: McKenzie, Peter
name: Kennedy, Hamilton
name: Brophy, Lisa
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 3202
subject: Clinical sciences

description: Objective: This study aims to assess the effectiveness of community-based models of care (MoCs) supporting the recovery of individuals who experience persistent and complex mental health needs.Method: We conducted a systematic review and narrative synthesis of MoC studies reporting clinical, functional, or personal recovery from October 2016 to October 2021. Sources were Medline, EMBASE, PsycInfo, CINAHL, and Cochrane databases. Studies were grouped according to MoC features. The narrative synthesis was led by our researchers with lived experience.Results: Beneficial MoCs ranged from well-established to novel and updated models and those explicitly addressing recovery goals and incorporating peer support: goal-focused; integrated community treatment; intensive case management; partners in recovery care coordination; rehabilitation and recovery-focused; social and community connection-focused; supported accommodation; and vocational support. None of our diverse group of MoCs supporting recovery warranted a rating of best practice. Established MoCs, such as intensive case management, are promising practices regarding clinical and functional recovery, with potential for enhancements to support personal recovery. Emerging practice models that support personal and functional recovery are those where consumer goals and priorities are central.Conclusion: Evidence for established models of care shows that there is a need for inevitable evolution and adaptation. Considering the high importance of effective MoCs for people experiencing persistent and complex mental health needs, further attention to service innovation and research is required. Greater emphasis on the inclusion of lived and living experience in the design, delivery, implementation, and research of MoCs is needed, to enhance MOCs' relevance for achieving individual consumer recovery outcomes.
A Gestão Ambiental na Hotelaria: O Caso de Portugal
Creators: name: Sousa, Natalina Ribeiro De
name: Eusébio, Celeste
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Neste artigo é analisada a adoção de Práticas de Gestão Ambiental (PGA) por parte de unidades hoteleiras, tendo sido estudado o caso específico dos hotéis em Portugal. Para cumprir este objetivo foram inquiridos, no ano de 2010, os diretores dos hotéis localizados em Portugal Continental sobre as medidas de gestão ambiental adotadas na sua unidade hoteleira. Foram realizados testes de associação (Qui-quadrado) e de diferenças entre grupos (Teste t) para analisar se existem diferenças estatisticamente significativas em termos de número de PGA adotadas e de tipo de práticas, tendo em atenção a existência de uma política formal de gestão ambiental e a existência de um sistema de certificação ambiental. Os resultados demonstram que a maioria dos hotéis implementa medidas de gestão ambiental, mas apenas cerca de 40% adota uma política de gestão ambiental formal e apenas 19% detém certificação ambiental. A análise de resultados também revelou que a adoção de práticas de gestão ambiental é favorecida pela presença de políticas formais de gestão ambiental e pela implementação de sistemas de certificação ambiental nos hotéis.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
Single Molecule FRET Reveals Pore Size and Opening Mechanism of MscL
Creators: name: Wang, Yong
name: Liu, Yanxin
name: DeBerg, Hannah A.
name: Nomura, Takeshi
name: Hoffman, Melinda Tonks
name: Rohde, Paul R.
name: Schulten, Klaus
name: Martinac, Boris
name: Selvin, Paul R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: The mechanosensitive channel of large conductance, which serves as a model system for mechanosensitive channels, has previously been crystallized in the closed form, but not in the open form. Ensemble measurements and electrophysiological sieving experiments show that the open-diameter of the channel pore is >25Å, but the exact size and whether the conformational change follows a helix-tilt or barrel-stave model are unclear. Here we report measurements of the distance changes on liposome-reconstituted MscL transmembrane α-helices, using a "virtual sorting" single-molecule fluorescence energy transfer. We observed directly that the channel opens via the helix-tilt model and the open pore reaches 2.8 nm in diameter. In addition, based on the measurements, we developed a molecular dynamics model of the channel structure in the open state which confirms our direct observations.
Estudos de avaliação da interpretação de atrações turísticas: Âmbito geográfico, dimensões de avaliação contempladas e técnicas utilizadas
Creators: name: Durão, Marília Sofia F.
name: Carneiro, Maria João
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: A interpretação constitui um importante fator de competitividade das atrações e, consequentemente, dos destinos, enquanto processo comunicacional que promove a maximização da experiência do visitante, a par de uma maior sensibilização para a conservação do património. No entanto, apesar da relevância que lhe é reconhecida, uma revisão de estudos sobre esta temática revelou que a avaliação da interpretação carece de maior fundamentação. A maioria destes estudos tem um âmbito restrito em termos de atrações turísticas, técnicas e dimensões de avaliação que são objeto de análise. Por este motivo, no presente artigo analisam-se problemas associados à avaliação da interpretação e faz-se uma revisão de estudos de avaliação da interpretação para identificar o âmbito destes estudos. A referida revisão permite concluir que os estudos de avaliação que têm vindo a ser realizados são muito divergentes, tanto em objetivos como em abordagens, mas focam-se, essencialmente, nos impactes da interpretação para o visitante, em dimensões como a aprendizagem, a interação social, as atitudes e emoções face à interpretação ou a mudança de comportamentos. Estes estudos apresentam também uma elevada concentração geográfica e privilegiam técnicas de recolha de dados como a observação e o inquérito por questionário. As conclusões do artigo são importantes para todos os que queiram desenvolver estudos de avaliação da interpretação em atrações turísticas.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
Turismo internacional: Os grandes operadores turísticos e as principais tendências de evolução
Creators: name: Carrasqueira, Helder Manuel Brito
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: O presente artigo procura contribuir para um melhor conhecimento das tendências de evolução dos Operadores Turísticos (OT) a nível europeu. Neste sentido, focalizamo-nos nos dois grandes OT do mercado europeu: TUI e Thomas Cook. O modelo de negócio estabilizado nos anos noventa levou à verticalização da cadeia de valor e à concentração das empresas à volta dos grandes players nos principais mercados emissores. Porém, o ritmo avassalador da globalização com a emergência dos BRIC, a ameaça das companhias aéreas low cost e das reservas online, as catástrofes naturais e as alterações político económicas, a crise económica, o modelo de gestão financeiramente alavancado e as exigências ambientais, deverão alterar significativamente o modelo de negócio na presente década.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
Radiated Angular Momentum and Dissipative Effects in Classical Scattering
Creators: name: Manohar, Aneesh V.
name: Ridgway, Alexander K.
name: Shen, Chia-Hsien
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a new formula for the angular momentum $J^{μν}$ carried away by gravitational radiation in classical scattering. This formula, combined with the known expression for the radiated linear momentum $P^μ$, completes the set of radiated Poincare charges due to scattering. We parametrize $P^μ$ and $J^{μν}$ by non-perturbative form factors and derive exact relations using the Poincare algebra. There is a contribution to $J^{μν}$ due to static (zero-frequency) modes, which can be derived from Weinberg's soft theorem. Using tools from scattering amplitudes and effective field theory, we calculate the radiated $J^{μν}$ due to the scattering of two spinless particles to third order in Newton's constant $G$, but to all orders in velocity. Our form-factor analysis elucidates a novel relation found by Bini, Damour, and Geralico between energy and angular momentum loss at $\mathcal{O}(G^3)$. Our new results have several nontrivial implications for binary scattering at $\mathcal{O}(G^4)$. We give a procedure to bootstrap an effective radiation reaction force from the loss of Poincare charges due to scattering.
description: 5 pages +refs, two figures and one Mathematica ancillary file for table I; minor revision and fixed a typo in the definition of \Delta b, matched to PRL version in v2
The Data Behind Dark Matter: Exploring Galactic Rotation
Creators: name: Villano, A. N.
name: Harris, Kitty C.
name: Bergfalk, Judit
name: Hatami, Raphael
name: Vititoe, Francis
name: Johnston, Julia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Physics Education (physics.ed-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Dark matter is estimated to make up ~84% of all normal/baryonic matter, but cannot be directly imaged. Despite the fact that dark matter cannot be directly observed yet, its influence on the motion of stars and gas in spiral galaxies have been detected. One way to show motion in galaxies are rotation curves that are plots of velocity measurements of how fast stars and gas move in a galaxy around the center of mass. According to Newton's Law of Gravitation, the rotational velocity is an indication of the amount of visible and non-visible mass in the galaxy. Given that the visible matter is measurable using photometry, dark matter mass can therefore be estimated, offering an insight into the size distribution in galaxies. In order to gain a greater appreciation of the research scientists' findings about dark matter, their method should be easily reproduced by any curious individual. Our interactive workshop is an excellent educational tool to investigate how dark matter impacts the rotation of visible matter by providing a guide to produce galactic rotation curves. The Python-based notebooks are set up to walk you through the whole process of producing rotation curves using an online database (SPARC) and to allow you to learn about each component of the galaxy. The three steps of the rotation curve building process is plotting the measured velocity data, constructing the rotation curves for each component, and fitting the total velocity to the measured values.
description: 6 pages, 1 table
title: 3D Surface-downhole electrical resistivity tomography data sets of the Ketzin CO2 storage pilot from the CO2SINK project phase
Creators: name: Labitzke, Tim
name: Bergmann, Peter
name: Kiessling, D.
name: Schmidt-Hattenberger, Cornelia
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2012

description: Scientific Technical Report; 12/05; ISSN 1610-0956
A Riemann-Hilbert approach to the modified Camassa-Holm equation with step-like boundary conditions
Creators: name: Karpenko, Iryna
name: Shepelsky, Dmitry
name: Teschl, Gerald
Publisher: name: arXiv
Year: 2022
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: Primary: 35Q53, Secondary: 37K15, 35Q15, 35B40, 35Q51, 37K40

description: The paper aims at developing the Riemann-Hilbert (RH) approach for the modified Camassa-Holm (mCH) equation on the line with non-zero boundary conditions, in the case when the solution is assumed to approach two different constants at different sides of the line. We present detailed properties of spectral functions associated with the initial data for the Cauchy problem for the mCH equation and obtain a representation for the solution of this problem in terms of the solution of an associated RH problem.
description: 34 pages
Molecular Quantum Circuit Design: A Graph-Based Approach
Creators: name: Kottmann, Jakob S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Science is rich in abstract concepts that capture complex processes in astonishingly simple ways. A prominent example is the reduction of molecules to simple graphs. This work introduces a design principle for parametrized quantum circuits based on chemical graphs, providing a way forward in three major obstacles in quantum circuit design for molecular systems: Operator ordering, parameter initialization and initial state preparation. It allows physical interpretation of each individual component and provides an heuristic to qualitatively estimate the difficulty of preparing ground states for individual instances of molecules.
Eventos Corporativos e sua Importância Estratégica para as Empresas. Estudo de Casos Múltiplos: Pfizer, L’Oréal e Nextel
Creators: name: Dorneles, Ormene Carvalho Coutinho
name: Wada, Elizabeth Kyoko
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Eventos envolvem anfitrião e convidado em momentos especiais, proporcionando experiências únicas, impossíveis de serem reproduzidas em qualquer outro ambiente ou situação. Nas organizações, esse vínculo se destina a alcançar ou manter uma relação positiva e atitude lucrativa do participante em relação à empresa, criando vantagem competitiva e maximizando o retorno sobre o investimento. Como integrantes do setor do turismo e da hospitalidade, os eventos acompanham a necessidade de adequação às mudanças do ambiente. Sua gestão apresenta dois aspectos: a determinação de sua necessidade e posteriormente sua realização, compreendendo suas diferentes etapas, de responsabilidade de áreas distintas para contratação de fornecedores e realização. Este trabalho traz um estudo de caso comparativo entre três empresas, procurando identificar o resultado esperado com a realização dos eventos corporativos e a respectiva responsabilidade das áreas envolvidas. Além disso, pretende explorar como a literatura existente é adotada nos aspectos práticos dos eventos, contribuindo para o traçado de novos rumos para o setor do turismo.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)
Properties of Magnetic Neutral Line Gradients and Formation of Filaments
Creators: name: Karachik, Nina V.
name: Pevtsov, Alexei A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate gradient of magnetic field across neutral lines (NLs), and compare their properties for NLs with and without the chromospheric filaments. Our results show that there is a range of preferred magnetic field gradients where the filament formation is enhanced. On the other hand, a horizontal gradient of magnetic field across a NL alone does not appear to be a single factor that determines if a filament will form (or not) in a given location.
description: 11 pages, 8 figures
title: Yearly operational datasetes of the CO2 storage pilot site Ketzin, Germany
Creators: name: Moeller, Fabian
name: Liebscher, Axel
name: Martens, Sonja
name: Schmidt-Hattenberger, Cornelia
name: Kuehn, Michael
Publisher: name: Deutsches GeoForschungsZentrum GFZ
Year: 2012

description: Scientific Technical Report - Data; 12/06; ISSN 1610-0956
Die hohe National Versam[m]lung folgt der Einladung nach Cöln zum Dombaufeste; [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 in Frankfurt aM
Iitaka fibrations for dlt pairs polarized by a nef and log big divisor
Creators: name: Hashizume, Kenta
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E30, 14J17, 14J40

description: We study lc pairs polarized by a nef and log big divisor. After proving the minimal model theory for projective lc pairs polarized by a nef and log big divisor, we prove the effectivity of the Iitaka fibrations and some boundedness results for dlt pairs polarized by a nef and log big divisor.
description: final version, only minor changes, to appear in Forum Math. Sigma
Carrier-resolved real-field theory of multi-octave frequency combs
Creators: name: Puzyrev, Danila N.
name: Skryabin, Dmitry V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Optical frequency combs are pillars of precision spectroscopy, and their microresonator realization serves applications where miniaturization and large tooth separation are important. Microresonator combs cover an enormous range of time scales varying from the femtosecond periods of optical oscillations to milliseconds corresponding to the kilohertz linewidth of the comb teeth. Here, we develop and implement the carrier-resolved real-field model for multi-octave frequency combs, which allows for nearly ab initio capture of all the time scales involved. As an example, we consider a microresonator that has a mix of second- and third-order nonlinearities and uses periodic poling. By applying the real-field approach, we demonstrate how to surpass traditional limitations and model the spectral broadening and soliton mode-locking across three optical octaves.
description: 4 pages
Photoproduction of C-even quarkonia at EIC and EicC
Creators: name: Jia, Yu
name: Mo, Zhewen
name: Pan, Jichen
name: Zhang, Jia-Yue
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The $η_c$ photoproduction in $ep$ collision has long been proposed as an ideal process to probe the existence of odderon. In the current work, we systematically investigate the photoproduction of various $C$-even heavy quarkonia (exemplified by $η_{c(b)}$, and $χ_{c(b)J}$ with $J=0,1,2$) via one-photon exchange channel, at the lowest order in $α_s$ and heavy quark velocity in the context of NRQCD factorization. We find that the photoproduction rates of the $C$-even quarkonia through this mechanism are comparable in magnitude with that through the odderon-initiated mechanism, even in the Regge limit ($s\gg -t$), though the latter types of predictions suffers from considerable theoretical uncertainties. The future measurements of these types of quarkonium photoproduction processes in \texttt{EIC} and \texttt{EicC} are crucial to ascertain which mechanism plays the dominant role.
description: 16 pages, 9 figures
Supernova enrichment and dynamical histories of solar-type stars in clusters
Creators: name: Parker, Richard J.
name: Church, Ross P.
name: Davies, Melvyn B.
name: Meyer, Michael R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We use N-body simulations of star cluster evolution to explore the hypothesis that short-lived radioactive isotopes found in meteorites, such as 26-Al, were delivered to the Sun's protoplanetary disc from a supernova at the epoch of Solar System formation. We cover a range of star cluster formation parameter space and model both clusters with primordial substructure, and those with smooth profiles. We also adopt different initial virial ratios - from cool, collapsing clusters to warm, expanding associations. In each cluster we place the same stellar population; the clusters each have 2100 stars, and contain one massive 25M_Sun star which is expected to explode as a supernova at about 6.6Myr. We determine the number of Solar (G)-type stars that are within 0.1 - 0.3pc of the 25M_Sun star at the time of the supernova, which is the distance required to enrich the protoplanetary disc with the 26-Al abundances found in meteorites. We then determine how many of these G-dwarfs are unperturbed `singletons'; stars which are never in close binaries, nor suffer sub-100au encounters, and which also do not suffer strong dynamical perturbations. The evolution of a suite of twenty initially identical clusters is highly stochastic, with the supernova enriching over 10 G-dwarfs in some clusters, and none at all in others. Typically only ~25 per cent of clusters contain enriched, unperturbed singletons, and usually only 1 - 2 per cluster (from a total of 96 G-dwarfs in each cluster). The initial conditions for star formation do not strongly affect the results, although a higher fraction of supervirial (expanding) clusters would contain enriched G-dwarfs if the supernova occurred earlier than 6.6Myr. If we sum together simulations with identical initial conditions, then ~1 per cent of all G-dwarfs in our simulations are enriched, unperturbed singletons.
description: 14 pages, 5 figures, accepted for publication in MNRAS
Universal transition of spectral fluctuation in particle-hole symmetric system
Creators: name: Mondal, Triparna
name: Srivastava, Shashi C. L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the spectral properties of a multiparametric system having particle-hole symmetry in random matrix setting. We observe a crossover from Poisson to Wigner-Dyson like behavior in average local ratio of spacing within a spectrum of single matrix as a function of effective single parameter referred to as complexity parameter. The average local ratio of spacing varies logarithmically in complexity parameter across the transition. This behavior is universal for different ensembles subjected to same matrix constraint like particle-hole symmetry. The universality of this dependence is further established by studying interpolating ensemble connecting systems with particle-hole symmetry to that with chiral symmetry. For each interpolating ensemble the behavior remains logarithmic in complexity parameter. We verify this universality of spectral fluctuation in case of a 2D Su-Schrieffer-Heeger (SSH) like model along with the logarithmic dependence on complexity parameter for ratio of spacing during transition from integrable to non-integrable limit.
Financiamento das unidades hoteleiras – determinantes do custo associado
Creators: name: Martins, Aida Maria De Brito
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2012

description: Durante o decurso da sua atividade normal, ou para realização de investimentos, os hotéis precisam de recursos financeiros. De acordo com a sua origem, estes recursos podem ser agrupados em duas categorias: interno ou autofinanciamento, e externo. Relativamente ao financiamento externo, um dos fatores preponderantes na escolha das fontes é o custo associado, dado que este atinge, nalguns casos, um valor elevado, reduzindo ou mesmo anulando a rentabilidade dos hotéis. A estipulação do custo do financiamento a este sector do turismo, por parte dos bancos, tem subjacente diversos fatores. Este artigo tem como principal objetivo analisar as determinantes do custo do financiamento externo, isto é, as variáveis consideradas pelos bancos na estipulação do spread. Para além disso constitui, igualmente, objetivo deste artigo identificar os indicadores de performance, financeiros e não financeiros, utilizados pelas unidades hoteleiras, os quais deverão contribuir para a melhoria da performance empresarial, implicando, consequentemente, a diminuição do custo do financiamento daquelas.
description: Revista Turismo & Desenvolvimento, vol. 2 n.º 17/18 (2012)