cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the propagation across the big bounce in an open quantum FLRW cosmology
Creators: name: Battista, Emmanuele
name: Steinacker, Harold C.
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: The propagation of a scalar field in an open FLRW bounce-type quantum spacetime is examined, which arises within the framework of the IKKT matrix theory. In the first part of the paper, we employ general-relativity tools to study null and timelike geodesics at the classical level. This analysis reveals that massless and massive non-interacting particles can travel across the big bounce. We then exploit quantum-field-theory techniques to evaluate the scalar field propagator. In the late-time regime, we find that it resembles the standard Feynman propagator of flat Minkowski space, whereas for early times it governs the propagation across the big bounce and gives rise to a well-defined correlation between two points on opposite sheets of the spacetime.
description: v2: version accepted for publication in EPJ C; conclusions have been slightly expanded and new references have been added
title: Bericht des volkswirtschaftlichen Ausschusses über den Entwurf einer Gewerbe-Ordnung und verschiedene diesen Gegenstand betreffende Petitionen und Anträge; [1849]
title: Beilage I. zum Protokoll der 177. öffentl. Sitzung vom 26. Februar 1849
titleType: Subtitle
Creators: name: Veit, Moritz
name: Hollandt, August
name: Mohl, Moritz von
name: Degenkolb, Karl
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Enth. u.a.: Motive der Minoritätsanträge der Abgeordneten Moriz Mohl, Schirmeister und Merck, zu dem Entwurfe einer Gewerbeordnung / berichterstatter: Abgeordneter Moriz Mohl. Entwurf einer Gewerbeordnung für das deutsche Reich / von Degenkolb, Veit, Becker aus Gotha, Lette
Information-related changes in contact patterns may trigger oscillations in the endemic prevalence of infectious diseases
Creators: name: d'Onofrio, Alberto
name: Manfredi, Piero
Publisher: name: arXiv
Year: 2013
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: It is well known that behavioral changes in contact patterns may significantly affect the spread of an epidemic outbreak. Here we focus on simple endemic models for recurrent epidemics, by modelling the social contact rate as a function of the available information on the present and past disease prevalence. We show that social behaviour change alone may trigger sustained oscillations. This indicates that human behavior might be a critical explaining factor of oscillations in time-series of endemic diseases. Finally, we briefly show how the inclusion of seasonal variations in contacts may imply chaos.
description: 14 pages, 2 figures
Desenvolvimento sustentável do turismo em Lisboa - quadro de acção estratégica
Creators: name: Partidário, Maria Do Rosário
name: Pimenta, Rui
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: O Quadro de Acção Estratégica para um Desenvolvimento Sustentável do Turismo de Lisboa procura conciliar as vertentes ambiental, social e económica do desenvolvimento turístico sustentável de Lisboa e apoiar a ATL com um instrumento de natureza estratégica e integradora. O estudo de base empírica e participativa envolveu uma análise dos recursos turísticos de Lisboa, incluindo recursos ambientais e socio-culturais, bem como uma análise do desempenho ambiental de unidades turísticas nesta cidade e a identificação de situações de benchmark ambiental e de sustentabilidade. O sucesso das acções estratégicas identificadas pressupõe a participação responsável de todas as instituições envolvidas na promoção de um turismo sustentável em Lisboa.
description: Revista Turismo & Desenvolvimento, n.º 3 (2005)
Galaxy number-count dipole and superhorizon fluctuations
Creators: name: Domènech, Guillem
name: Mohayaee, Roya
name: Patil, Subodh P.
name: Sarkar, Subir
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In view of the growing tension between the dipole anisotropy of number counts of cosmologically distant sources and of the cosmic microwave background (CMB), we investigate the number count dipole induced by primordial perturbations with wavelength comparable to or exceeding the Hubble radius today. First, we find that neither adiabatic nor isocurvature superhorizon modes can generate an intrinsic number count dipole. However a superhorizon isocurvature mode does induce a relative velocity between the CMB and the (dark) matter rest frames and thereby affects the CMB dipole. We revisit the possibility that it has an intrinsic component due to such a mode, thus enabling consistency with the galaxy number count dipole if the latter is actually kinematic in origin. Although this scenario is not particularly natural, there are possible links with other anomalies and it predicts a concommitant galaxy number count quadrupole which may be measurable in future surveys. We also investigate the number count dipole induced by modes smaller than the Hubble radius, finding that subject to CMB constraints this is too small to reconcile the dipole tension.
description: 25 pages + 15 figures + 1 table + 8 pages of appendices
Additional file 1 of Induced pluripotent stem cells derived from patients carrying mitochondrial mutations exhibit altered bioenergetics and aberrant differentiation potential
Creators: name: Meshrkey, Fibi
name: Scheulin, Kelly M.
name: Littlejohn, Christopher M.
name: Stabach, Joshua
name: Saikia, Bibhuti
name: Thorat, Vedant
name: Huang, Yimin
name: LaFramboise, Thomas
name: Lesnefsky, Edward J.
name: Rao, Raj R.
name: West, Franklin D.
name: Iyer, Shilpa
Publisher: name: figshare
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1. Supplementary Figures and Tables.
Identifying Time Scales in Particle Production from Fields
Creators: name: Diez, Matthias
name: Alkofer, Reinhard
name: Kohlfürst, Christian
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Particle production through ultra-strong electric fields is a well-studied research field. Nevertheless, despite repeated attempts to relate the production rate within the field to the formation time of a particle, the latter is still shrouded in mystery. We provide an interpretation of a particle distribution at finite times enabling us to isolate and, therefore, identify the relevant time scales regarding particle formation in quantum physics within and beyond perturbation theory.
description: 6 pages, 3 figures
Precise Derivations of Radiative Properties of Porous Media Using Renewal Theory
Creators: name: Hajimirza, Shima
Publisher: name: arXiv
Year: 2022
Subjects: subject: Numerical Analysis (math.NA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: This work uses the mathematical machinery of Renewal/Ruin (surplus risk) theory to derive preliminary explicit estimations for the radiative properties of dilute and disperse porous media otherwise only computable accurately with Monte Carlo Ray Tracing (MCRT) simulations. Although random walk and Levy processes have been extensively used for modeling diffuse processes in various transport problems and porous media modeling, relevance to radiation heat transfer is scarce, as opposed to other problems such as probe diffusion and permeability modeling. Furthermore, closed form derivations that lead to tangible variance reduction in MCRT are widely missing. The particular angle of surplus risk theory provides a richer apparatus to derive directly related quantities. To the best of the authors' knowledge, the current work is the only work relating the surplus risk theory derivations to explicit computations of ray tracing results in porous media. The paper contains mathematical derivations of the radiation heat transfer estimates using the extracted machinery along with proofs and numerical validation using MCRT.
First-Principles Simulations of Tip Enhanced Raman Scattering Reveal Active Role of Substrate on High-Resolution Images
Creators: name: Litman, Y.
name: Bonafé, F. P.
name: Akkoush, A.
name: Appel, H.
name: Rossi, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Tip-enhanced Raman scattering (TERS) has emerged as a powerful tool to obtain subnanometer spatial resolution fingerprints of atomic motion. Theoretical calculations that can simulate the Raman scattering process and provide an unambiguous interpretation of TERS images often rely on crude approximations of the local electric field. In this work, we present a novel and first principles-based method to compute TERS images by combining Time-Dependent Density Functional Theory (TD-DFT) and Density Functional Perturbation Theory (DFPT) to calculate Raman cross sections with realistic local fields. We present TERS results on the benzene and TCNE molecule, the latter of which is adsorbed at Ag(110). We demonstrate that chemical effects on chemisorbed molecules, often ignored in TERS simulations of medium and large systems sizes, dramatically change TERS images. This calls for the inclusion of chemical effects for predictive theory-experiment comparisons and understanding of molecular motion at the nanoscale.
title: Fundamental immunosuppressive pathway determining ability of cancer and embryonic cells to escape cytotoxic immune attack
Creators: name: Schlichtner, Stephanie
Publisher: name: University of Kent
Year: 2022

description: Nowadays rapid gaining of knowledge on cancer progression and mutagenesis has enabled the development of improved diagnostics and therapeutic approaches to be used in medicine. Yet, cancer is still one of the most dangerous diseases, especially in Europe, Asia, and America. This is due to rapid mutation of cancer cells and high costs of most therapies. A change in application of treatments is necessary to improve the survival of cancer patients, especially the development of personalized cancer therapy and establishment of easily accessible targets are needed. In the last 20 years the proteins Tim-3, galectin-9 and VISTA have been investigated regarding their influence on cancer development. While a significance was determined in their ability of suppressing immune responses, the exact mechanisms have not been researched yet. Structural analysis has deemed these proteins as being able to interact with each other and results so far indicate that by formation of protein complexes these proteins are able to efficiently inhibit cytotoxic immune responses. To investigate the immunosuppressive effects induced by interactions between these proteins and the ability to form such multi-protein complexes as receptors and ligands we used quantitative and qualitative experimental approaches. We analyzed a variety of cancer cell lines and primary cancer samples as well as embryonic cell lines and primary fetal samples. We were able to not only verify for the first time that galectin-9 is a ligand of VISTA, but we were also able to determine that the same mechanisms used by embryonic cells to adapt to the mother's immune system can be reused later in life by cancer cells to inhibit cytotoxic immune responses. Furthermore, we were able to prove that each of these proteins is supported by the TGF-β - Smad-3 pathway, which is also able to self-sustain the production of TGF-β in an autocrine/paracrine fashion. Data gained during the investigation of galectin-9 expression levels within other organisms also indicate that this protein is evolutionary conserved. Our results clearly show that understanding the exact mechanisms of this pathway will allow us to develop targeted, personalized and easily applicable immunotherapy in the future by determining the key factors in individual tumour types focusing on the Tim-3 - galectin-9 - VISTA pathway.
Phase boundaries of a spin-3/2 Blume-Emery-Griffiths model on a honeycomb lattice
Creators: name: Žukovič, M.
name: Jaščur, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The spin-3/2 Blume-Emery-Griffiths model on a honeycomb lattice is studied by Monte Carlo simulations with the goal to determine phase diagrams for a range of the model parameters and to investigate the nature of the phase transitions between the respective phases. For positive values of the biquadratic to bilinear interaction ratio $α$, we find two ferromagnetically ordered phases, F1 and F2, with the sublattice magnetizations (1/2,1/2) and (3/2,3/2), respectively, and our results confirm the discontinuous character of the order-disorder critical line as a function of the single-ion anisotropy strength, predicted by the effective-field theory (EFT). For negative values of $α$, there is another ferrimagnetic (FRM) phase of the type (1/2,3/2), located between F1 and F2. However, the step-like variation of the order-disorder critical frontier obtained from EFT for large negative $α$ is not reproduced and thus deemed artifact of the EFT approximation. Finite-size scaling analysis performed at various points between the respective identified phases gave the ratio of critical exponents $γ/ν$ consistent with the 2D Ising universality class, except in the vicinity of the boundary intersection, where the results deviated from the standard values beyond the measurement errors.
description: 12 pages, 10 figures
Rare $^{40}$K decay with implications for fundamental physics and geochronology
Creators: name: Stukel, M.
name: Hariasz, L.
name: Di Stefano, P. C. F.
name: Rasco, B. C.
name: Rykaczewski, K. P.
name: Brewer, N. T.
name: Stracener, D. W.
name: Liu, Y.
name: Gai, Z.
name: Rouleau, C.
name: Carter, J.
name: Kostensalo, J.
name: Suhonen, J.
name: Davis, H.
name: Lukosi, E. D.
name: Goetz, K. C.
name: Grzywacz, R. K.
name: Mancuso, M.
name: Petricca, F.
name: Fijałkowska, A.
name: Wolińska-Cichocka, M.
name: Ninkovic, J.
name: Lechner, P.
name: Ickert, R. B.
name: Morgan, L. E.
name: Renne, P. R.
name: Yavin, I.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Potassium-40 is a widespread, naturally occurring isotope whose radioactivity impacts subatomic rare-event searches, nuclear structure theory, and estimated geological ages. A predicted electron-capture decay directly to the ground state of argon-40 has never been observed. The KDK (potassium decay) collaboration reports strong evidence of this rare decay mode. A blinded analysis reveals a non-zero ratio of intensities of ground-state electron-captures ($I_{\text{EC}^0}$) over excited-state ones ($I_\text{EC*}$) of $ I_{\text{EC}^0} / I_\text{EC*} = 0.0095 \stackrel{\text{stat}}{\pm} 0.0022 \stackrel{\text{sys}}{\pm} 0.0010 $ (68% C.L.), with the null hypothesis rejected at 4$σ$. In terms of branching ratio, this signal yields $I_{\text{EC}^0} = 0.098\% \stackrel{\text{stat}}{\pm} 0.023\% \stackrel{\text{sys}}{\pm} 0.010\% $, roughly half of the commonly used prediction, with consequences for various fields [L. Hariasz et al., companion paper, DOI: 10.1103/PhysRevC.108.014327].
description: This is a companion paper to Hariasz et al (KDK collaboration) "Evidence for ground-state electron capture of ${}^{40}$K" [arXiv:2211.10343; DOI: 10.1103/PhysRevC.108.014327]. As such, both texts share some figures and portions of text. This version includes the journal DOI
Additional file 1 of Effectiveness of an educational intervention to promote psychosocial well-being of school-going adolescents in Sri Lanka
Creators: name: Vithana, Chiranthika
name: Lokubalasooriya, Ayesha
name: Pragasan, Ganeshamoorthy
name: Mahagamage, Kanchana Lanka
name: Nanayakkara, Kumudumalee
name: Herath, Himali Prasangika
name: Karunarathna, Priyani
name: Perera, Nadeeka
name: de Silva, Chithramalee
name: Jayawardene, Dushyanthi
name: Wickramasinghe, Nuwan Darshana
Publisher: name: figshare
Year: 2023
Subjects: Medicine
Biotechnology
Biological Sciences not elsewhere classified
Science Policy

description: Additional file 1.
On the Origin of Young Stars at the Galactic Center
Creators: name: Madigan, Ann-Marie
name: Pfuhl, Oliver
name: Levin, Yuri
name: Gillessen, Stefan
name: Genzel, Reinhard
name: Perets, Hagai B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The center of our galaxy is home to a massive black hole, SgrA*, and a nuclear star cluster containing stellar populations of various ages. While the late type stars may be too old to have retained memory of their initial orbital configuration, and hence formation mechanism, the kinematics of the early type stars should reflect their original distribution. In this contribution we present a new statistic which uses directly-observable kinematical stellar data to infer orbital parameters for stellar populations, and is capable of distinguishing between different origin scenarios. We use it on a population of B-stars in the Galactic center that extends out to large radii (0.5 pc) from the massive black hole. We find that the high K-magnitude population form an eccentric distribution, suggestive of a Hills binary-disruption origin.
description: 4 pages, 2 figures, Proceedings of IAU Symposium No. 303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus
Anderson localization crossover in 2D Si systems: The past and the present
Creators: name: Ahn, Seongjin
name: Sarma, Sankar Das
Publisher: name: arXiv
Year: 2022
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Using Ioffe-Regel-Mott (IRM) criterion for strong localization crossover in disordered doped 2D electron systems, we theoretically study the relationships among the three key experimentally determined localization quantities: critical density ($n_\mathrm{c}$), critical resistance ($ρ_\mathrm{c}$), and sample quality defined by the effective impurity density (as experimentally diagnosed by the sample mobility, $μ_\mathrm{m}$, at densities much higher than critical densities). Our results unify experimental results for 2D metal-insulator transitions (MIT) in Si systems over a 50-year period (1970-2020), showing that $n_\mathrm{c}$ ($ρ_\mathrm{c}$) decrease (increase) with increasing sample quality, explaining why the early experiments in the 1970s, using low-quality samples ($μ_\mathrm{m} \sim 10^3 \mathrm{cm}^2/Vs$) reported strong localization crossover at $n_c \sim 10^{12} \mathrm{cm}^{-2}$ with $ρ_c \sim 10^3Ω$ whereas recent experiments (after 1995), using high-quality samples ($μ_\mathrm{m} >10^4 \mathrm{cm}^2/Vs$), report $n_c \sim 10^{11} \mathrm{cm}^{-2}$ with $ρ_c>10^4Ω$. Our theory establishes the 2D MIT to be primarily a screened Coulomb disorder-driven strong localization crossover phenomenon, which happens at different sample-dependent critical density and critical resistance, thus unifying Si 2D MIT phenomena over a 50-year period.
description: 5 pages, 1 figure
A rotação de pessoal e a gestão de recursos humanos na hotelaria: o caso da região do Porto e norte de Portugal
Creators: name: Martins, Catarina
name: Machado, Carolina
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: A gestão das empresas do sector turístico, nomeadamente a hotelaria, enfrenta o problema de assegurar uma performance superior por parte dos seus Recursos Humanos, muitas vezes recrutados por uma época, tradicionalmente mal pagos e sujeitos a uma elevada taxa de rotação de pessoal. Face a esta problemática, o presente trabalho pretende abordar a dimensão que a rotação de pessoal tem para as organizações do sector hoteleiro da região do Porto e Norte de Portugal, e ainda, avaliar até que ponto esta se relaciona, ou não, com a existência de efectivas práticas de gestão de recursos humanos. São colocadas duas hipóteses que permitem concluir acerca da forma como práticas efectivas de recursos humanos estão correlacionadas com a rotatividade, bem como de que forma a dimensão da unidade hoteleira explica a existência /inexistência de práticas de Gestão de Recursos Humanos.
description: Revista Turismo & Desenvolvimento, n.º 4 (2005)
Universal truncation error upper bounds in sampling restoration
Creators: name: Olenko, Andriy
name: Pogány, Tibor K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: 94A20, 41A25(Primary), 41A05, 41A17, 41A80, 26D15(Secondary)

description: Universal (pointwise uniform and time shifted) truncation error upper bounds are presented for the Whittaker--Kotel'nikov--Shannon (WKS) sampling restoration sum for Bernstein function classes $B_{π,d}^q,\, q>1,\, d\in \mathbb N$, when the decay rate of the sampled functions is unknown. The case of regular sampling is discussed. Extremal properties of related series of sinc functions are investigated.
description: 18 pages, 2 figures. This is an Author's Accepted Manuscript of an article published in the Georgian Mathematical Journal. Vol.17, No. 4. (2010), 765-786. The final publication is available at De Gruyter. DOI: 10.1515/gmj.2010.033
Constructing a measure of balance recovery confidence for older persons: content themes from different stakeholders
Creators: name: Soh, Leng Hsien Shawn
name: Gilmour, Fiona
name: Lane, Judith
name: Asokan, Shalini
name: Woan, Kang Ling
name: Tan, Chee-Wee
Publisher: name: Singapore Institute of Technology
Year: 2023
Subjects: Physiotherapy

description: This article aims to encourage researchers to use the principles of practice development to address this gap by involving relevant stakeholders to gain greater insight. A collaborative, inclusive and participatory approach involving different stakeholders, underpinned by practice development methodology, can offer rich insights for PROM developers.
The Hurwitz-Hopf Map and Harmonic Wave Functions for Integer and Half-Integer Angular Momentum
Creators: name: Hojman, Sergio A.
name: Nahmad-Achar, Eduardo
name: Sánchez-Valenzuela, Adolfo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Harmonic wave functions for integer and half-integer angular momentum are given in terms of the Euler angles $(θ,ϕ,ψ)$ that define a rotation in $SO(3)$, and the Euclidean norm in ${\mathbb R}^3$. Following a classical work by Schwinger, $2$-dimensional harmonic oscillators are used to produce raising and lowering operators that change the total angular momentum eigenvalue of the wave functions in half units. The nature of the representation space $\mathcal H$ is approached from the double covering group homomorphism $SU(2)\to SO(3)$ and the topology involved is taken care of by using the Hurwitz-Hopf map $H:{\mathbb R}^4\to{\mathbb R}^3$. It is shown how to reconsider $H$ as a 2-to-1 group map, $G_0={\mathbb R}^+\times SU(2)\to {\mathbb R}^+\times SO(3)$, translating it into an assignment $(z_1,z_2)\mapsto (r,θ,ϕ,ψ)$ whose domain consists of pairs $(z_1,z_2)$ of complex variables. It is shown how the Lie algebra of $G_0$ is coupled with two Heisenberg Lie algebras of $2$-dimensional (Schwinger's) harmonic oscillators generated by the operators $\{z_1,z_2,\bar{z}_1,\bar{z}_2\}$ and their adjoints. The whole set of operators gets algebraically closed either into a $13$-dimensional Lie algebra or into a $(4|8)$-dimensional Lie superalgebra. The wave functions in $\mathcal H$ can be written in terms of polynomials in the complex coordinates $(z_1,z_2)$ and their complex conjugates, and the representations are explicitly constructed via the various highest weight (or lowest weight) vector representations of $G_0$. A new non-relativistic quantum (Schrödinger-like) equation for the hydrogen atom that takes into account the electron spin is introduced and expressed in terms of $(r,θ,ϕ,ψ)$ and the time $t$. The equation may be solved exactly in terms of the harmonic wave functions hereby introduced.
description: 28 pages, 1 diagram
A importância económica do turismo
Creators: name: Cabugueira, Artur
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: O turismo é uma actividade económica extremamente importante, podendo desempenhar um papel decisivo em termos de desenvolvimento de determinadas regiões, onde, por vezes, não existem outras alternativas para alcançar esse objectivo. Neste artigo, analisamos os principais impactos económicos do turismo, nomeadamente sobre os rendimentos e o emprego, a balança de pagamentos e as receitas dos governos. Fazemos ainda uma abordagem dos efeitos multiplicadores do turismo, técnica usada para calcular os impactos contínuos das despesas do turismo na economia. Referimo-nos, em seguida, a alguns aspectos relacionados com a importância do turismo no crescimento e desenvolvimento regional. Verificámos que o turismo pode dinamizar as potencialidades naturais e histórico-culturais das regiões mais deprimidas. Acrescentámos, contudo, que não é o turismo que fomenta o desenvolvimento dum determinado país ou região, mas sim o seu próprio nível de desenvolvimento, que converte o turismo numa actividade favorável ou não a esse processo. Finalmente, abordamos também a questão relacionada com o papel do turismo no desenvolvimento económico regional dos países desenvolvidos, através da redistribuição do rendimento nacional, em benefício das regiões receptoras. A este propósito, apresentamos os argumentos de determinados autores que contrariam a visão clássica de que o turismo é um factor de convergência no desenvolvimento dos vários países, concluindo que o turismo não deixa de ser importante para o desenvolvimento, mas que este não depende exclusivamente dele, mas também do grau de desenvolvimento dos outros sectores da economia.
description: Revista Turismo & Desenvolvimento, n.º 4 (2005)
Critical current anisotropy in Nd-1111 single crystals and the infuence of neutron irradiation
Creators: name: Eisterer, M.
name: Mishev, V.
name: Zehetmayer, M.
name: Zhigadlo, N. D.
name: Katrych, S.
name: Karpinski, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on angle-resolved magnetization measurements on NdFeAsO$_{0.65}$F$_{0.35}$ (Nd-1111) single crystals. The field dependence of the critical current density, $J_c$, is non-monotonous in these crystals at all orientations and temperatures due to the fishtail effect, which strongly influences the angular dependence of $J_c$. The currents decrease as the field is tilted from the crystallographic c-axis at low fields, but increase at high fields. A peak occurs in the angular dependence of $J_c$ at intermediate fields. The critical currents are significantly enhanced after irradiation with fast neutrons and the fishtail disappears. The different current anisotropies at low and high fields, however, persist. We discuss the data in the framework of the anisotropic scaling approach and propose a transition from dominant pinning by large defects of low density at low fields to pinning by small defects of high density at high fields in the pristine crystal. Strong pinning dominates at all fields after the irradiation, and the angular dependence of $J_c$ can be described by anisotropic scaling only after an appropriate extension to this pinning regime.
Diversity-aware social robots meet people: beyond context-aware embodied AI
Creators: name: Recchiuto, Carmine
name: Sgorbissa, Antonio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The article introduces the concept of "diversity-aware" robotics and discusses the need to develop computational models to embed robots with diversity-awareness: that is, robots capable of adapting and re-configuring their behavior to recognize, respect, and value the uniqueness of the person they interact with to promote inclusion regardless of their age, race, gender, cognitive or physical capabilities, etc. Finally, the article discusses possible technical solutions based on Ontologies and Bayesian Networks, starting from previous experience with culturally competent robots.
description: The article has been presented during the Roundtable "AI in holistic care and healing practices: the caring encounter beyond COVID-19", Anthropology, AI and the Future of Human Society, 6-10 June 2022, Royal Anthropological Institute
Dynamic State Estimation for Load Bus Protection on Inverter-Interfaced Microgrids
Creators: name: Barnes, Arthur K.
name: Mate, Adam
name: Bikorimana, Jean Marie V.
name: Castillo, Ricardo J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Inverter-interfaced microgrids results in challenges when designing protection systems. Traditional time-overcurrent, admittance, and differential protection methods are unsuitable on account of lack of fault current, excessively short lines, or a prohibitive number of protective devices needing to be installed. Current practice is to force all inverters to shut down during fault conditions, weakening resilience and reducing reliability. Dynamic state estimation (DSE), which has been explored for both line protection and load bus protection before, is a potential solution to these challenges to create widely utilizable, highly reliable protection systems. However, it has only been tested for load protection with ideal voltage sources, which do not capture the short-circuit behavior of inverter-interfaced generation, notably low fault current and unbalanced output voltage. This paper aims to extend the state-of-the-art on DSE load protection: the performance of DSE during short-circuit conditions with a grid-forming inverter with current-limiting behavior during fault conditions is investigated.
description: 5 pages. 3 figures. 1 tables
Guiding synchrony through random networks
Creators: name: Jahnke, Sven
name: Timme, Marc
name: Memmesheimer, Raoul-Martin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Sparse random networks contain structures that can be considered as diluted feed-forward networks. Modeling of cortical circuits has shown that feed-forward structures, if strongly pronounced compared to the embedding random network, enable reliable signal transmission by propagating localized (sub-network) synchrony. This assumed prominence, however, is not experimentally observed in local cortical circuits. Here we show that nonlinear dendritic interactions as discovered in recent single neuron experiments, naturally enable guided synchrony propagation already in random recurrent neural networks exhibiting mildly enhanced, biologically plausible sub-structures.
Additional file 1 of Cingulate white matter mediates the effects of fecal Ruminococcus on neuropsychiatric symptoms in patients with amyloid-positive amnestic mild cognitive impairment
Creators: name: Hung, Chun-Che
name: Chao, Yi-Ping
name: Lee, Yejin
name: Huang, Chi-Wei
name: Huang, Shu-Hua
name: Chang, Chiung-Chih
name: Cheng, Chia-Hsiung
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Immunology
subject: FOS: Clinical medicine
subject: Mental Health

description: Supplementary Material 1
IWDM: The fate of an interacting non-cold dark matter $-$ vacuum scenario
Creators: name: Pan, Supriya
name: Yang, Weiqiang
name: Di Valentino, Eleonora
name: Mota, David F.
name: Silk, Joseph
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In most cosmological models, the equation of state of the dark matter is assumed to be zero, which means that the dark matter is pressure-less or cold. While this hypothesis is based on the abundance of cold dark matter in the universe, however, there is no compelling reason to assume that the equation of state of dark matter is exactly zero. A more general approach would be to allow for a range of values for the dark matter equation of state and use the observational data to determine which values are most likely. With the increasing accuracy of experimental data, we have chosen to explore the possibility of interacting non-cold dark matter $-$ vacuum scenario, where the equation of state of the dark matter is constant but can take different values within a specific range. Using the Cosmic Microwave Background (CMB) anisotropies and the CMB lensing reconstruction from the Planck legacy release, plus other non-CMB measurements, namely, the baryon acoustic oscillations distance measurements, and the Pantheon catalogue from Type Ia Supernovae, we have analyzed this scenario and found that a non-zero value for the dark matter equation of state is preferred with a confidence level of over 68\%. While this is not significant by itself, however, it does suggest that investigating the possibility of non-cold dark matter in the universe is worth exploring further to gain a better understanding of the nature of dark matter.
description: 15 pages, 4 tables and 5 captioned figures; version accepted by JCAP
Elementos de avaliação económica dos principais destinos turísticos portugueses
Creators: name: Silva, João Albino
name: Andraz, Jorge Miguel
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: O presente trabalho pretende ser um contributo para a análise do potencial de mobilização do turismo para o progresso regional, nas regiões do Algarve, de Lisboa e Vale do Tejo e da Madeira. A análise assenta na caracterização da estrutura do sector turístico naquelas regiões, ao nível da oferta e da procura, do dinamismo evidenciado na década de 90 e ainda na identificação do posicionamento estratégico e da contribuição do sector para a estruturação sectorial das economias regionais. A análise empírica sugere que as regiões analisadas têm constituído os principais destinos turísticos nacionais, em termos dos indicadores de oferta e de procura ao concentrarem 80% do número total de camas e 84% do total de dormidas. O fenómeno da dependência económica relativamente ao sector turístico assume proporções significativas nas regiões do Algarve e da Madeira, quer em termos dos mercados emissores, quer em termos do produto procurado. A análise configura uma situação em que sobressai a aposta na convergência das regiões, através do investimento nos ramos dinâmicos da economia e, simultaneamente, do aproveitamento das especificidades regionais para o desenvolvimento de ramos específicos. Contudo, esta estratégia tem contribuído para a fragilização do tecido económico das regiões do Algarve e da Madeira que se encontram estruturadas exclusivamente em torno da actividade turística.
description: Revista Turismo & Desenvolvimento, n.º 4 (2005)
A importância da Internet para as agências de viagens brasileiras utilizadoras do GDS Amadeus
Creators: name: Biz, Alexandre
name: Lohmann, Guilherme
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: O surgimento da internet provocou uma mudança, não só na forma como os produtos turísticos são distribuídos, fazendo com que a demanda passasse a evitar intermediários, tais como agentes de viagens, mas também no relacionamento entre estes e os sistemas globais de distribuição (GDS). Este artigo tem como objectivo analisar a nova forma de comunicação que passou a existir entre as agências de viagens e o GDS AMADEUS, com a introdução da internet. De particular interesse é o comportamento das agências de viagem face ao uso da internet e dos produtos disponibilizados pelo GDS, através da rede mundial de computadores. O método utilizado consiste de uma entrevista realizada com um gerente do AMADEUS Brasil e de um questionário disponibilizado no site do AMADEUS Brasil. Um total de 1 0 6 agências de viagens brasileiras participou nesta pesquisa.
description: Revista Turismo & Desenvolvimento, n.º 4 (2005)
title: Ein Besuch auf Erden; [1849]
title: dramatische Skizze in einem Akt zur Feier von Goethes hundertjährigem Geburtstag
titleType: Subtitle
Creators: name: Teichlein, Anton
name: Lachner, Franz Paul
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2018

description: Uraufführung: München, 1849. - Akte: 1. - Szenen: 5. - Rollen: Faust (Hr. Dahn); Mephistopheles (Hr. König); Dryas (Mad. Dahn); Dr. Geist, Mitglied des Festcomités (Hr. Büttgen); Maler Müller, Mitglied des Festcomités (Hr. Christen); Juck, Schneidermeister (Hr. Lang); Erstes Nähmädchen (Frl. Tochtermann); Zweites Nähmädchen (Frl. Müller); Erster alte Herr (Hr. Zängl); Zweiter alte Herr (Hr. Sigl); Erster junge Mann (Hr. Leigh); Zweiter junge Mann (Hr. L. Schmid), u.a.
Massive neutrino self-interactions and inflation
Creators: name: Choudhury, Shouvik Roy
name: Hannestad, Steen
name: Tram, Thomas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Certain inflationary models like Natural inflation (NI) and Coleman-Weinberg inflation (CWI) are disfavoured by cosmological data in the standard $Λ\textrm{CDM}+r$ model (where $r$ is the scalar-to-tensor ratio), as these inflationary models predict the regions in the $n_s-r$ parameter space that are excluded by the cosmological data at more than 2$σ$ (here $n_s$ is the scalar spectral index). The same is true for single field inflationary models with an inflection point that can account for all or majority of dark matter in the form of PBHs (primordial black holes). Cosmological models incorporating strongly self-interacting neutrinos (with a heavy mediator) are, however, known to prefer lower $n_s$ values compared to the $Λ\rm CDM$ model. Considering such neutrino self-interactions can, thus, open up the parameter space to accommodate the above inflationary models. In this work, we implement the massive neutrino self-interactions with a heavy mediator in two different ways: flavour-universal (among all three neutrinos), and flavour-specific (involving only one neutrino species). We implement the new interaction in both scalar and tensor perturbation equations of neutrinos. Interestingly, we find that the current cosmological data can support the aforementioned inflationary models at 2$σ$ in the presence of such neutrino self-interactions.
description: 22 pages, 6 figures
Commissioning and first performances of the ALICE MID RPCs
Creators: name: Terlizzi, Livia
Publisher: name: arXiv
Year: 2022
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: ALICE (A Large Ion Collider Experiment) at the CERN Large Hadron Collider (LHC) is designed to study p-p and Pb-Pb collisions at ultra-relativistic energies. ALICE is equipped with a Muon Spectrometer (MS) to study the heavy charmonia in p-p and heavy ion collisions via their muonic decay. At first, in the LHC Run 1 and 2 the selection of interesting events for muon physics in the MS was performed with a dedicated Muon Trigger system based on Resistive Plate Chambers (RPCs) operated in maxi-avalanche mode. During the Long Shutdown 2 (LS2) of LHC ALICE underwent a major upgrade of its apparatus: since Run 3 (started in July 2022), in order to fully profit from the increased luminosity of Pb-Pb collisions (from 20 kHz in Run 2 to 50 kHz in Run 3), the ALICE experiment is running in continuous readout (triggerless) mode and the Muon Trigger became the Muon IDentifier (MID). In order to reduce the RPC ageing and to increase the rate capability, it was decided to use a new front-end electronics FEERIC with a pre-amplification stage to minimize the charge released per hit inside the gas gap. A description of the MID upgrades, together with the results and performances of the RPCs from the commissioning, is presented in this talk.
Aplicação de técnicas de avaliação da usabilidade ao Portugal inSite
Creators: name: Milheiro, Eva
name: Costa, Carlos
name: Santos, Maria Beatriz
Publisher: name: Revista Turismo & Desenvolvimento
Year: 2005

description: A Internet constitui actualmente um excelente veículo de disseminação e comunicação de informação turística e possui um potencial promocional inquestionável. As Organizações de Marketing de Destinos recorrem a ela cada vez mais para divulgar os seus destinos e promover os seus produtos e, actualmente, praticamente todos os destinos possuem um, ou mais, websites com esta finalidade. No entanto, para que um site seja eficaz na sua missão de divulgação e promoção, deverá apresentar uma interface de utilizador bem construída e projectada, que tenha em conta a sua usabilidade. Este artigo pretende analisar o Portugal inSite no que concerne aos seus conteúdos e qualidade da sua interface de utilizador, recorrendo a técnicas de avaliação da usabilidade que resultam da revisão da literatura sobre a matéria e que foram aplicadas num estudo empírico realizado em Março de 2004.
description: Revista Turismo & Desenvolvimento, n.º 4 (2005)
Ring-apodized vortex coronagraphs for obscured telescopes. I. Transmissive ring apodizers
Creators: name: Mawet, Dimitri
name: Pueyo, Laurent
name: Carlotti, Alexis
name: Mennesson, Bertrand
name: Serabyn, Eugene
name: Wallace, James K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The vortex coronagraph (VC) is a new generation small inner working angle (IWA) coronagraph currently offered on various 8-meter class ground-based telescopes. On these observing platforms, the current level of performance is not limited by the intrinsic properties of actual vortex devices, but by wavefront control residuals and incoherent background (e.g. thermal emission of the sky) or the light diffracted by the imprint of the secondary mirror and support structures on the telescope pupil. In the particular case of unfriendly apertures (mainly large central obscuration) when very high contrast is needed (e.g. direct imaging of older exoplanets with extremely large telescopes or space- based coronagraphs), a simple VC, as most coronagraphs, can not deliver its nominal performance because of the contamination due to the diffraction from the obscured part of the pupil. Here we propose a novel yet simple concept that circumvents this problem. We combine a vortex phase mask in the image plane of a high-contrast instrument with a single pupil-based amplitude ring apodizer, tailor designed to exploit the unique convolution properties of the VC at the Lyot-stop plane. We show that such a ring-apodized vortex coronagraph (RAVC) restores the perfect attenuation property of the VC regardless of the size of the central obscuration, and for any (even) topological charge of the vortex. More importantly the RAVC maintains the IWA and conserves a fairly high throughput, which are signature properties of the VC.
description: 10 pages, 6 figures
Identification of single- and double-well coherence-incoherence patterns by the binary distance matrix
Creators: name: Santos, Vagner dos
name: Sales, Matheus Rolim
name: Muni, Sishu Shankar
name: Szezech, José D.
name: Batista, Antonio Marcos
name: Yanchuk, Serhiy
name: Kurths, Jürgen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: The study of chimera states or, more generally, coherence-incoherence patterns has led to the development of several tools for their identification and characterization. In this work, we extend the eigenvalue decomposition method to distinguish between single-well and double-well patterns. By applying our method, we are able to identify the following four types of dynamical patterns in a ring of nonlocally coupled Chua circuits and nonlocally coupled cubic maps: single-well cluster, single-well coherence-incoherence pattern, double-well cluster, and double-well coherence-incoherence. In a ring-star network of Chua circuits, we investigate the influence of adding a central node on the spatio-temporal patterns. Our results show that increasing the coupling with the central node favors the occurrence of single-well coherence-incoherence states. We observe that the boundaries of the attraction basins resemble fractal and riddled structures
Coordinate-Based Seismic Interpolation in Irregular Land Survey: A Deep Internal Learning Approach
Creators: name: Goyes, Paul
name: Vargas, Edwin
name: Correa, Claudia
name: Sun, Yu
name: Kamilov, Ulugbek
name: Wohlberg, Brendt
name: Arguello, Henry
Publisher: name: arXiv
Year: 2022
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Physical and budget constraints often result in irregular sampling, which complicates accurate subsurface imaging. Pre-processing approaches, such as missing trace or shot interpolation, are typically employed to enhance seismic data in such cases. Recently, deep learning has been used to address the trace interpolation problem at the expense of large amounts of training data to adequately represent typical seismic events. Nonetheless, most research in this area has focused on trace reconstruction, with little attention having been devoted to shot interpolation. Furthermore, existing methods assume regularly spaced receivers/sources failing in approximating seismic data from real (irregular) surveys. This work presents a novel shot gather interpolation approach which uses a continuous coordinate-based representation of the acquired seismic wavefield parameterized by a neural network. The proposed unsupervised approach, which we call coordinate-based seismic interpolation(CoBSI), enables the prediction of specific seismic characteristics in irregular land surveys without using external data during neural network training. Experimental results on real and synthetic 3D data validate the ability of the proposed method to estimate continuous smooth seismic events in the time-space and frequency-wavenumber domains, improving sparsity or low-rank-based interpolation methods.