cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The role of the pufX gene product of Rhodobacter capsulatus
Creators: name: Lilburn, Timothy George
Publisher: name: University of British Columbia
Year: 2010

description: The 2.7 kilobase transcript of the puf operon of the photosynthetic bacterium Rhodobacter capsulatus has five open reading frames. The gene products of four of these open reading frames (pufB, A, L,and M) are well characterized as structural polypeptides of the reaction center (pufL and M) and the B870 light-harvesting antenna complex (pufB and A), The role of the pufX gene product has been unknown. By deleting the pufX gene from a plasmid carrying the puf operon and using this plasmid to reconstitute a strain of R. capsulatus which had the puf operon deleted, it was possible to characterize the pufX gene product. It was found that the pufX⁻ mutant was unable to grow photosynthetically until a secondary suppressor mutation had occurred. It appeared that either more than one type of suppressor mutation could occur or that one suppressor mutation could be accompanied by further mutations. To determine the nature of the lesion caused by the deletion of pufX, the structure of the photosynthetic unit and the ability of the subunits of the photosynthetic unit to accomplish energy and electron transfer of the mutant were compared to a pseudo-wild type. Spectrophotometric techniques, including fluorescence detection, reduced minus oxidized spectra, flash-induced absorbance change spectra, and ground state absorption spectra were used for these comparisons as well as biochemical assays. The biochemical assays measured the ability of chromatophores to transfer electrons from a quinone analog to horse-heart cytochrome c and to pump protons in response to light irradiation. The results of these comparisons indicated that the individual components of the photosynthetic unit functioned normally but that electron transfer between these components, specifically between the reaction center and the cytochrome b⁄c₁ complex, was impaired. It thus seemed likely that there was some structural defect in the photosynthetic unit. The structure of the photosynthetic units of pseudo-wild type and mutant strains was probed using sodium dodecyl sulfate-polyacrylamide gels, absorption spectroscopy, and electron microscopy. It was determined that the mutant had chromatophore vesicles that were about 50% larger than those of the pseudo-wild type and contained higher levels of reaction center and B870 light-harvesting antenna polypeptides. The suppressor mutants also had altered levels of polypeptides and showed differences in the way the expression of their B800-850 polypeptides was regulated. It was concluded that the pufX gene product plays a role in the correct assembly of the photosynthetic unit as a structural component of the unit and/or as a regulator of its assembly.
In-depth analysis of the Naming Game dynamics: the homogeneous mixing case
Creators: name: Baronchelli, Andrea
name: Loreto, Vittorio
name: Steels, Luc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computer Science and Game Theory (cs.GT)
subject: Multiagent Systems (cs.MA)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Language emergence and evolution has recently gained growing attention through multi-agent models and mathematical frameworks to study their behavior. Here we investigate further the Naming Game, a model able to account for the emergence of a shared vocabulary of form-meaning associations through social/cultural learning. Due to the simplicity of both the structure of the agents and their interaction rules, the dynamics of this model can be analyzed in great detail using numerical simulations and analytical arguments. This paper first reviews some existing results and then presents a new overall understanding.
description: 30 pages, 19 figures (few in reduced definition). In press in IJMPC
แนวทางการฝึกซ้อมดนตรี เพื่อให้เกิดการพัฒนาในการเรียน
Creators: name: ธวัช อัศวเดชาฤทธิ์
Publisher: name: วารสารมหาวิทยาลัยพายัพ
Year: 2019
Subjects: การฝึกซ้อมดนตรี
การพัฒนาในการเรียน
พื้นฐานในการเรียนดนตรี

description: วารสารมหาวิทยาลัยพายัพ, 29, 1, 1
User Consented Federated Recommender System Against Personalized Attribute Inference Attack
Creators: name: Hu, Qi
name: Song, Yangqiu
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recommender systems can be privacy-sensitive. To protect users' private historical interactions, federated learning has been proposed in distributed learning for user representations. Using federated recommender (FedRec) systems, users can train a shared recommendation model on local devices and prevent raw data transmissions and collections. However, the recommendation model learned by a common FedRec may still be vulnerable to private information leakage risks, particularly attribute inference attacks, which means that the attacker can easily infer users' personal attributes from the learned model. Additionally, traditional FedRecs seldom consider the diverse privacy preference of users, leading to difficulties in balancing the recommendation utility and privacy preservation. Consequently, FedRecs may suffer from unnecessary recommendation performance loss due to over-protection and private information leakage simultaneously. In this work, we propose a novel user-consented federated recommendation system (UC-FedRec) to flexibly satisfy the different privacy needs of users by paying a minimum recommendation accuracy price. UC-FedRec allows users to self-define their privacy preferences to meet various demands and makes recommendations with user consent. Experiments conducted on different real-world datasets demonstrate that our framework is more efficient and flexible compared to baselines.
description: Accepted by WSDM2024
On the domain wall partition functions of level-1 affine so(n) vertex models
Creators: name: Dow, A
name: Foda, O
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We derive determinant expressions for domain wall partition functions of level-1 affine so(n) vertex models, n >= 4, at discrete values of the crossing parameter lambda = m pi / 2(n-3), m in Z, in the critical regime.
description: 14 pages, 13 figures included in latex file
The impact of nitrogen doping on the linear and nonlinear terahertz response of graphene
Creators: name: Anvari, Roozbeh
name: Zaremba, Eugene
name: Dignam, Marc M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: It is well known that impurities play a central role in the linear and nonlinear response of graphene at optical and terahertz frequencies. In this work, we calculate the bands and intraband dipole connection elements for nitrogen-doped monolayer graphene using a density functional tight binding approach. Employing these results, we calculate the linear and nonlinear response of the doped graphene to terahertz pulses using a density-matrix approach in the length gauge. We present the results for the linear and nonlinear mobility as well as third harmonic generation in graphene for adsorbed and substitutional nitrogen doping for a variety of doping densities. We show that the conduction bands are more parabolic in graphene structures with substitutional nitrogen doping than for those with adsorbed nitrogen. As a result, substitutional doping has a greater impact on the terahertz mobility and nonlinear response of graphene than adsorbed nitrogen does.
description: 16 pages, 9 figures
On defect groups for generalized blocks of the symmetric group
Creators: name: Gramain, Jean-Baptiste
Publisher: name: arXiv
Year: 2007
Subjects: subject: Representation Theory (math.RT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20C30 (Primary) 20C15, 20C20 (Secondary)

description: In a paper of 2003, B. Külshammer, J. B. Olsson and G. R. Robinson defined $\ell$-blocks for the symmetric groups, where $\ell >1$ is an arbitrary integer. In this paper, we give a definition for the defect group of the principal $\ell$-block. We then check that, in the Abelian case, we have an analogue of one of M. Broué's conjectures.
description: 18 pages
Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering
Creators: name: Konings, S.
name: Schuessler-Langeheine, C.
name: Ott, H.
name: Weschke, E.
name: Schierle, E.
name: Zabel, H.
name: Goedkoop, J. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the direct observation of slow fluctuations of helical antiferromagnetic domains in an ultra-thin holmium film using coherent resonant magnetic x-ray scattering. We observe a gradual increase of the fluctuations in the speckle pattern with increasing temperature, while at the same time a static contribution to the speckle pattern remains. This finding indicates that domain-wall fluctuations occur over a large range of time scales. We ascribe this non-ergodic behavior to the strong dependence of the fluctuation rate on the local thickness of the film.
description: to appear in Phys. Rev. Lett
Optimal Quantum Measurements of Expectation Values of Observables
Creators: name: Knill, Emanuel
name: Ortiz, Gerardo
name: Somma, Rolando D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Experimental characterizations of a quantum system involve the measurement of expectation values of observables for a preparable state |psi> of the quantum system. Such expectation values can be measured by repeatedly preparing |psi> and coupling the system to an apparatus. For this method, the precision of the measured value scales as 1/sqrt(N) for N repetitions of the experiment. For the problem of estimating the parameter phi in an evolution exp(-i phi H), it is possible to achieve precision 1/N (the quantum metrology limit) provided that sufficient information about H and its spectrum is available. We consider the more general problem of estimating expectations of operators A with minimal prior knowledge of A. We give explicit algorithms that approach precision 1/N given a bound on the eigenvalues of A or on their tail distribution. These algorithms are particularly useful for simulating quantum systems on quantum computers because they enable efficient measurement of observables and correlation functions. Our algorithms are based on a method for efficiently measuring the complex overlap of |psi> and U|psi>, where U is an implementable unitary operator. We explicitly consider the issue of confidence levels in measuring observables and overlaps and show that, as expected, confidence levels can be improved exponentially with linear overhead. We further show that the algorithms given here can typically be parallelized with minimal increase in resource usage.
description: 22 pages
COMPORTAMENTO DE CONSUMO MASCULINO E A ECONOMIA DO COMPARTILHAMENTO
Creators: name: Cavalheiro, Gustavo Augusto Tavares
name: Morales, Luma Soares
name: Souto, Vitória
Publisher: name: Zenodo
Year: 2016

description: Esse projeto tem por objetivo estudar o setor das empresas de moda no uso de aplicativos e plataformas de gestão de dados que possibilitem um conhecimento profundo dos seus consumidores e maior assertividade em suas estratégias de gestão. Atualmente podemos observar o início do processo de um modelo econômico chamado shared economy, que está ganhando espaço impulsionado pelas tecnologias digitais e interativas, onde o compartilhamento se apresenta na forma de produtos, serviços e informações automatizadas, que vem ganhando espaço nas relações de consumo.
The relationship of stress and depressed mood to maternal reactions
Creators: name: Krech, Kathryn H.
Publisher: name: University of British Columbia
Year: 2010

description: Models of parenting are becoming increasingly complex. The domain has evolved from a simple parent behavior - child behavior paradigm to one which considers systemic influences. Contextual variables, such as life stress and depressed mood, are beginning to receive much attention in the literature. Also, researchers have noted the importance of measuring parent cognition (i.e., perceptions) and affect in addition to acquiring information regarding parent behavior. The present study was designed to explore the role played by two levels of stress; global life events and daily hassles, and by depressed mood, in determining maternal affective, behavioral and cognitive responses to child behavior. A community sample of 66 single mothers participated in the study. Mothers read 12 descriptions of child behavior, each embedded in one of three contexts of stress (i.e., global life event context, daily hassles context, no stress context). The sample was divided into three groups (n=22) on the basis of scores on a standard mood instrument. Only those mothers who received scores in the two extreme groups (i.e., depressed mood and nondepressed mood) were included in the main analyses. A two-way repeated measures MANOVA revealed a main effect for stress, but not for mood, when the BDI was used to create the groups. When the CES-D was utilized, a main effect for stress, and for mood, was detected. No significant stress by mood interaction was observed. Follow-up univariate ANOVAS and multiple comparision tests revealed that the daily hassles context had a greater influence on maternal responses to child behavior than did the global life events context. That is, mothers were more affectively aroused, indicated a more intense anticipated behavioral reaction and perceived the child behavior to be more deviant, in the daily hassles condition compared to the other conditions. In addition, mothers who reported more depressed mood indicated greater affective responsiveness to the child behavior vignettes than mothers who did not report depressed mood. The results are discussed in terms of empirical and applied implications.
Supertwistor formulation for higher dimensional superstrings
Creators: name: Uvarov, D. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Considered is the formulation for the superstring action in 6 and 10 dimensions involving supertwistor variables that appropriately generalize 4-dimensional Ferber supertwistors. Equations of motion and kappa-symmetry transformations in terms of the supertwistors are derived. It is shown that covariant kappa-symmetry gauge fixing reduces superstring action to the quadratic one with respect to supertwistors. Upon gauge fixing remaining symmetries it can be cast into the form of the light-cone gauge Green-Schwarz superstring action.
description: LaTeX, 19 pages; v2: minor improvements of the presentation, misprints corrected, references added
A Globally Convergent Evolutionary Strategy for Stochastic Constrained Optimization with Applications to Reinforcement Learning
Creators: name: Diouane, Youssef
name: Lucchi, Aurelien
name: Patil, Vihang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Machine Learning (cs.LG)
subject: Optimization and Control (math.OC)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Evolutionary strategies have recently been shown to achieve competing levels of performance for complex optimization problems in reinforcement learning. In such problems, one often needs to optimize an objective function subject to a set of constraints, including for instance constraints on the entropy of a policy or to restrict the possible set of actions or states accessible to an agent. Convergence guarantees for evolutionary strategies to optimize stochastic constrained problems are however lacking in the literature. In this work, we address this problem by designing a novel optimization algorithm with a sufficient decrease mechanism that ensures convergence and that is based only on estimates of the functions. We demonstrate the applicability of this algorithm on two types of experiments: i) a control task for maximizing rewards and ii) maximizing rewards subject to a non-relaxable set of constraints.
PCS -- A Roadmap for Exoearth Imaging with the ELT
Creators: name: Kasper, Markus
name: Urra, Nelly Cerpa
name: Pathak, Prashant
name: Bonse, Markus
name: Nousiainen, Jalo
name: Engler, Byron
name: Heritier, Cédric Taïssir
name: Kammerer, Jens
name: Leveratto, Serban
name: Rajani, Chang
name: Bristow, Paul
name: Louarn, Miska Le
name: Madec, Pierre-Yves
name: Ströbele, Stefan
name: Verinaud, Christophe
name: Glauser, Adrian
name: Quanz, Sascha P.
name: Helin, Tapio
name: Keller, Christoph
name: Snik, Frans
name: Boccaletti, Anthony
name: Chauvin, Gaël
name: Mouillet, David
name: Kulcsár, Caroline
name: Raynaud, Henri-François
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Planetary Camera and Spectrograph (PCS) for the Extremely Large Telescope (ELT) will be dedicated to detecting and characterising nearby exoplanets with sizes from sub-Neptune to Earth-size in the neighbourhood of the Sun. This goal is achieved by a combination of eXtreme Adaptive Optics (XAO), coronagraphy and spectroscopy. PCS will allow us not only to take images, but also to look for biosignatures such as molecular oxygen in the exoplanets' atmospheres. This article describes the PCS primary science goals, the instrument concept and the research and development activities that will be carried out over the coming years.
description: 6 pages, 6 figures
FERRAMENTAS DO DESIGN THINKING NO DESENVOLVIMENTO DO EUTEGUIO, UMA INTERFACE INTERATIVA DE AUXÍLIO A CRIANÇAS AUTISTAS
Creators: name: Oliveira, Aline Cristina Antoneli de
name: Baldessar, Maria José
name: Fagundes, Priscila Basto
name: Alves, Natália Terezinha
Publisher: name: Zenodo
Year: 2016

description: This paper aims to present how tools that use the design thinking approach were applied in the ideation, design and development of the prototype on an interactive interface that aims to help the autonomy of children who are at some level of ASD (autism spectrum disorder). Several tools were studied and applied, such as in-depth interviews, Stakeholders Map, Empathy Map, Persona and Point of View. At the end it developed a prototype website that helps parents of autistic children in their daily routine, called EuTeGuio. About 160 (one hundred and sixty) parents or guardians validated the idea, and of these 32 (thirty-two) tested the prototype. O presente trabalho objetiva apresentar como ferramentas que utilizam a abordagem do design thinking foram aplicadas na ideação, concepção e desenvolvimento do protótipo de uma interface interativa que objetiva auxiliar na autonomia de crianças que se encontram em algum nível do TEA (Transtorno do Espectro Autista). Várias ferramentas foram estudadas e aplicadas, como entrevistas em profundidade, Mapa de Stakeholders, Mapa de Empatia, Persona e Point of View. Ao final foi desenvolvido um protótipo web que auxilia os pais de crianças autistas em sua rotina diária, o EuTeGuio. Cerca de 160 (cento e sessenta) pais ou responsáveis validaram a ideia, sendo que destes 32 (trinta e dois) testaram o protótipo.
Entanglement-induced electron coherence in a mesoscopic ring with two magnetic impurities
Creators: name: Ciccarello, F.
name: Palma, G. M.
name: Zarcone, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the Aharonov-Bohm (AB) interference pattern in the electron transmission through a mesoscopic ring in which two identical non-interacting magnetic impurities are embedded. Adopting a quantum waveguide theory, we derive the exact transmission probability amplitudes and study the influence of maximally entangled states of the impurity spins on the electron transmittivity interference pattern. For suitable electron wave vectors, we show that the amplitude of AB oscillations in the absence of impurities is in fact not reduced within a wide range of the electron-impurity coupling constant when the maximally entangled singlet state is prepared. Such state is thus able to inhibit the usual electron decoherence due to scattering by magnetic impurities. We also show how this maximally entangled state of the impurity spins can be generated via electron scattering.
description: 8 pages
Graph Neural Networks Based Detection of Stealth False Data Injection Attacks in Smart Grids
Creators: name: Boyaci, Osman
name: Umunnakwe, Amarachi
name: Sahu, Abhijeet
name: Narimani, Mohammad Rasoul
name: Ismail, Muhammad
name: Davis, Katherine
name: Serpedin, Erchin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: False data injection attacks (FDIAs) represent a major class of attacks that aim to break the integrity of measurements by injecting false data into the smart metering devices in power grids. To the best of authors' knowledge, no study has attempted to design a detector that automatically models the underlying graph topology and spatially correlated measurement data of the smart grids to better detect cyber attacks. The contributions of this paper to detect and mitigate FDIAs are twofold. First, we present a generic, localized, and stealth (unobservable) attack generation methodology and publicly accessible datasets for researchers to develop and test their algorithms. Second, we propose a Graph Neural Network (GNN) based, scalable and real-time detector of FDIAs that efficiently combines model-driven and data-driven approaches by incorporating the inherent physical connections of modern AC power grids and exploiting the spatial correlations of the measurement. It is experimentally verified by comparing the proposed GNN based detector with the currently available FDIA detectors in the literature that our algorithm outperforms the best available solutions by 3.14%, 4.25%, and 4.41% in F1 score for standard IEEE testbeds with 14, 118, and 300 buses, respectively.
description: 12 pages, 10 figures, journal
Unexpected Cancellations in Gravity Theories
Creators: name: Bern, Z.
name: Carrasco, J. J.
name: Forde, D.
name: Ita, H.
name: Johansson, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recent computations of scattering amplitudes show that N=8 supergravity is surprisingly well behaved in the ultraviolet and may even be ultraviolet finite in perturbation theory. The novel cancellations necessary for ultraviolet finiteness first appear at one loop in the guise of the "no-triangle hypothesis". We study one-loop amplitudes in pure Einstein gravity and point out the existence of cancellations similar to those found previously in N=8 supergravity. These cancellations go beyond those found in the one-loop effective action. Using unitarity, this suggests that generic theories of quantum gravity based on the Einstein-Hilbert action may be better behaved in the ultraviolet at higher loops than suggested by naive power counting, though without additional (supersymmetric) cancellations they diverge. We comment on future studies that should be performed to support this proposal.
description: 40 pages, 6 figures. v2 minor corrections, removed comment on absence of rational terms in N=4 supergravity
Deliverable 4.1 – Threshold of nutritional quality for the Mediterranean production
Creators: name: Izquierdo, Marisol
name: Dominguez, David
name: Fontanillas, Ramón
name: Foudoulaki, Eleni
name: Nengas, Ioannis
Publisher: name: Zenodo
Year: 2020

description: Fish meal is being increasingly substituted in diets for gilthead sea bream and Sea bream with ingredients of terrestrial origin. The replacement of Fish Meal (FM) and Fish Oil (FO), as main protein and lipid sources by alternative ingredients, may alter the micronutrient contents in the diets, leading to deficiencies or excess in several micronutrients related to fish growth, feed efficiency and health (Fountoulaki et al., 2016; Dominguez et al., 2019a, 2019b). Nowadays, aquafeeds for Mediterranean species are mostly based on nutritional requirements determined for other species (NRC, 2011) and in many most micronutrients, the requirements have not been yet determined for fish species. Hence, those feeds may be deficient or overdosed in some nutrients and, consequently, negatively affect KPIs (Dominguez et al., 2016). PerformFISH WP4 aimed to define the recommended levels for minerals and vitamins in gilthead sea bass and Sea bream diets to produce Species-­‐Specific Nutrient Balanced Formulations and improve KPIs in relation to growth, feed utilization and mortality in Mediterranean aquaculture. Despite there is scarce information published about nutrients requirements and availability for gilthead sea bream and sea bass (essential fatty acids, protein,…), certain national and EU funded projects produced some information about the recommended dietary levels for specific nutrients (phospholipids, Zn, Vit B5…). This critical nutritional information has been compiled and collected by PerformFISH and included in Milestone 4.1. Besides, since the nutritional requirements of some nutrients essential to improve KPIs have not been yet determined for gilthead sea bream and sea bass, PerformFISH has conducted a series of studies to determine the recommended dietary levels to produce Species-Specific Nutrient Balanced Formulations. In the case of gilthead sea bream, the trials were conducted to define the effect of fat-­‐soluble vitamins (A, K, and D), minerals (Cu, Mn and Se) and B group vitamins (B1, B9, and B12), whereas for Sea bass different profiles of chelated minerals have been tested. Deliverable 4.1 is mainly composed of the major experimental findings and, thus, the nutrient recommendations to define the threshold of nutritional quality for both fish species as keystone elements of the Mediterranean production.
MÍDIAS SOCIAIS NA EAD: O FACEBOOK COMO FERRAMENTA PEDAGÓGICA
Creators: name: Rodrigues, Wellyelton Gualberto de Brito
name: Santos, Thamara Lima Vieira
Publisher: name: Zenodo
Year: 2016

description: Em virtude do avanço tecnológico e da consequente evolução da internet, o desenvolvimento de novas formas de ensinar e aprender tem se tornado possível. A busca por novas ferramentas pedagógicas que aperfeiçoam os processos de ensino e aprendizagem é bastante relevante, pois contribui com o aperfeiçoamento qualitativo do ensino. O estudo propõe discutir a possibilidade de uso da rede social Facebook como ferramenta pedagógica na educação, em especial na modalidade a distância (EAD). A pesquisa se desenvolveu a partir do procedimento técnico da pesquisa bibliográfica, na qual foram evidenciados estudos sobre o Facebook. Foi demonstrado que o Facebook não é apenas um espaço para compartilhar informações, mas apresenta características de uma ferramenta pedagógica com grande potencial, é um meio de comunicação capaz de integrar pessoas, proporcionar diversos tipos de interação, um espaço para o compartilhamento de ideias e conhecimento.
Search for dark matter in events with missing transverse momentum and a Higgs boson decaying into two photons in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for dark-matter particles in events with large missing transverse momentum and a Higgs boson candidate decaying into two photons is reported. The search uses $139$ fb$^{-1}$ of proton-proton collision data collected at $\sqrt{s}=13$ TeV with the ATLAS detector at the CERN LHC between 2015 and 2018. No significant excess of events over the Standard Model predictions is observed. The results are interpreted by extracting limits on three simplified models that include either vector or pseudoscalar mediators and predict a final state with a pair of dark-matter candidates and a Higgs boson decaying into two photons.
description: 49 pages in total, author list starting page 34, 12 figures, 4 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2019-02/
High resolution infrared spectroscopy of the old open cluster NGC6791
Creators: name: Origlia, L.
name: Valenti, E.
name: Rich, R. M.
name: Ferraro, F. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report abundance analysis for 6 M giant members of the old open cluster NGC6791, based on infrared spectroscopy (1.5-1.8 micron) at R=25,000, using the NIRSPEC spectrograph at the Keck II telescope. We find the iron abundance = +0.35 +/- 0.02$, confirming the super solar metallicity of this cluster derived from optical medium-high resolution spectroscopy. We also measure C, O and other alpha element abundances, finding roughly solar [alpha/Fe] and = -0.35. Our approach constrains [O/Fe] especially well, based on the measurement of a number of OH lines near 1.6micron; we find [O/Fe]=-0.07 +/-0.03. The Solar alpha enhancement is in contrast to the composition of similar stars in the Galactic bulge. We also find low 12C/13C~10, confirming the presence of extra-mixing processes during the red giant phase of evolution, up to super solar metallicities.
description: 14 pages, 3 figures, accepted for publication on ApJ
PNL to HOL: from the logic of nominal sets to the logic of higher-order functions
Creators: name: Dowek, Gilles
name: Gabbay, Murdoch J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3.0; F.3.2
subject: 03B70 (primary), 68Q55 (secondary)

description: Permissive-Nominal Logic (PNL) extends first-order predicate logic with term-formers that can bind names in their arguments. It takes a semantics in (permissive-)nominal sets. In PNL, the forall-quantifier or lambda-binder are just term-formers satisfying axioms, and their denotation is functions on nominal atoms-abstraction.
 Then we have higher-order logic (HOL) and its models in ordinary (i.e. Zermelo-Fraenkel) sets; the denotation of forall or lambda is functions on full or partial function spaces.
 This raises the following question: how are these two models of binding connected? What translation is possible between PNL and HOL, and between nominal sets and functions?
 We exhibit a translation of PNL into HOL, and from models of PNL to certain models of HOL. It is natural, but also partial: we translate a restricted subsystem of full PNL to HOL. The extra part which does not translate is the symmetry properties of nominal sets with respect to permutations. To use a little nominal jargon: we can translate names and binding, but not their nominal equivariance properties. This seems reasonable since HOL -- and ordinary sets -- are not equivariant.
 Thus viewed through this translation, PNL and HOL and their models do different things, but they enjoy non-trivial and rich subsystems which are isomorphic.
description: arXiv admin note: substantial text overlap with arXiv:1111.4611
Entanglement in Many-Body Systems
Creators: name: Amico, Luigi
name: Fazio, Rosario
name: Osterloh, Andreas
name: Vedral, Vlatko
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recent interest in aspects common to quantum information and condensed matter has prompted a prosperous activity at the border of these disciplines that were far distant until few years ago. Numerous interesting questions have been addressed so far. Here we review an important part of this field, the properties of the entanglement in many-body systems. We discuss the zero and finite temperature properties of entanglement in interacting spin, fermionic and bosonic model systems. Both bipartite and multipartite entanglement will be considered. At equilibrium we emphasize on how entanglement is connected to the phase diagram of the underlying model. The behavior of entanglement can be related, via certain witnesses, to thermodynamic quantities thus offering interesting possibilities for an experimental test. Out of equilibrium we discuss how to generate and manipulate entangled states by means of many-body Hamiltonians.
description: 61 pages, 29 figures
Extra dimensions in CERN LHC via mini-black holes: effective Kerr-Newman brane-world effects
Creators: name: da Rocha, Roldao
name: Coimbra-Araujo, Carlos H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We solve Einstein equations on the brane to derive the exact form of the braneworld-corrected perturbations in Kerr-Newman singularities, using Randall-Sundrum and Arkani-Hamed-Dimopoulos-Dvali (ADD) models. It is a consequence of such models the possibility that Kerr-Newman mini-black holes can be produced in LHC. We use this approach to derive a normalized correction for the Schwarzschild Myers-Perry radius of a static $(4+n)$-dimensional mini-black hole, using more realistic approaches arising from Kerr-Newman mini-black hole analysis. Besides, we prove that there are four Kerr-Newman black hole horizons in braneworld scenario we use, although only the outer horizon is relevant in the physical measurable processes. Parton cross sections in LHC and Hawking temperature are also investigated as functions of Planck mass (in the LHC range 1-10 TeV), mini-black hole mass and the number of large extra dimensions in braneworld large extra-dimensional scenarios. In this case a more realistic brane effect-corrected formalism can achieve more precisely the effective extra-dimensional Planck mass and the number of large extra dimensions -- in Arkani-Hamed-Dimopoulos-Dvali model -- or the size of the warped extra dimension -- in Randall-Sundrum formalism.
description: 11 pages, 23 figures, citations updated
Concluding remarks
Creators: name: Zahn, Jean-Paul
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: To be published in the proceedings of IAU Symposium 239 "Convection in Astrophysics" (ed. F. Kupka, I. W. Roxburgh, K. L. Chan). Content: 1. From Nice to Prague, 2. The triumph of 3-D simulations, 3. How to lower the cost - what else can be done? 4. A powerful tool to determine surface abundances, 5. The effects of convection are not confined to convection zones, 6. Towards a realistic model of the solar dynamo, 7. The moment of truth: facing observational tests, 8. On my wish-list.
description: 6 pages
Coverage and completeness: comparing sources of open metadata
Creators: name: Kramer, Bianca
name: Neylon, Cameron
Publisher: name: Zenodo
Year: 2021
Subjects: open metadata
FORCE11

description: Lightning talk presentation at FORCE2021

 Abstract: The recently announced closure of Microsoft Academic raises challenges for the many tools, projects and services which have relied on it as a source of largely open metadata. This closure highlights the need for transparency, provenance and community governance in open metadata collection and provision. Multiple organizations are working to produce such datasets, including to fill the gap the closure of Microsoft Academic will create.

 Ideally, these initiatives do not lead to siloed collections of metadata, but will contribute to a rich open metadata landscape. More than simply a set of datasets competing with each other we need data that can be combined to enable discovery, linking and integration of data on research process and outputs. To enable evaluation and systemic change in the research system we will need to tell new stories about how research is produced, shared and used. In this project, we assessed the value added by integrating Microsoft Academic data with Crossref metadata, and compared this to the recently released OpenAlex dataset.

 We show how this analysis can be extended to other datasets such as OpenAIRE and CORE, to assess the completeness and coverage of current metadata collections, identify where they can strengthen each other and which gaps and biases in the open metadata landscape remain to be addressed.
Atomic Landau-Zener tunneling in Fourier-synthesized optical lattices
Creators: name: Salger, Tobias
name: Geckeler, Carsten
name: Kling, Sebastian
name: Weitz, Martin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report on an experimental study of quantum transport of atoms in variable periodic optical potentials. The band structure of both ratchet-type asymmetric and symmetric lattice potentials is explored. The variable atom potential is realized by superimposing a conventional standing wave potential of λ/2 spatial periodicity with a fourth-order multiphoton potential of λ/4 periodicity. We find that the Landau-Zener tunneling rate between the first and the second excited Bloch band depends critically on the relative phase between the two spatial lattice harmonics.
description: 5 pages, 5 figures
The sound of the event horizon
Creators: name: Konoplya, R. A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: During the ringdown phase of a gravitational signal emitted by a black hole, the least damped quasinormal frequency dominates. If modifications to Einstein's theory induce noticeable deformations of the black-hole geometry only near the event horizon, the fundamental mode remains largely unaffected. However, even a small change near the event horizon can significantly impact the first few overtones, providing a means to probe the geometry of the event horizon. Overtones are stable against small deformations of spacetime at a distance from the black hole, allowing the event horizon to be distinguished from the surrounding environment. In contrast to echoes, overtones make a much larger energy contribution. These findings open up new avenues for future observations.
description: Honorable mention of the Gravity Research Foundation 2023 Awards for Essays on Gravitation
Renormalized Schwinger-Dyson functional
Creators: name: Guadagnini, Enore
name: Urso, Vittoria
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the perturbative renormalization of the Schwinger-Dyson functional, which is the generating functional of the expectation values of the products of the composite operator given by the field derivative of the action. It is argued that this functional plays an important role in the topological Chern-Simons and BF quantum field theories. It is shown that, by means of the renormalized perturbation theory, a canonical renormalization procedure for the Schwinger-Dyson functional is obtained. The combinatoric structure of the Feynman diagrams is illustrated in the case of scalar models. For the Chern-Simons and the BF gauge theories, the relationship between the renormalized Schwinger-Dyson functional and the generating functional of the correlation functions of the gauge fields is produced.
description: 15 pages, 2 figures
Thermal orientation of electron spins
Creators: name: Tarasenko, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is shown that the spin orientation of free electrons occurs in low-symmetry semiconductor structures if only the electron gas is driven out of thermal equilibrium with the crystal lattice. The proposed mechanism of such a thermal orientation of electron spins is based on spin dependence of the electron-phonon interaction which tends to restore equilibrium. The microscopic theory of the effect is developed here for asymmetric (110)-grown quantum wells where the electron gas heating leads to the spin orientation along the [1-10] axis in the quantum well plane.
description: 4 pages, 1 figure
เขตอำนาจศาลในการพิจารณาคดีตามข้อบังคับบรัสเซลส์
Creators: name: รุ่งนภา อดิศรมงคล
Publisher: name: วารสารมหาวิทยาลัยพายัพ
Year: 2019
Subjects: เขตอำนาจศาล
ข้อบังคับบรัสเซลส์
การยอมรับคำพิพากษาของศาลต่างประเทศ

description: วารสารมหาวิทยาลัยพายัพ, 29, 1, 12
Is keeping in or letting out anger good for your heart?
Creators: name: Lai, Josanna Yuk-Lin
Publisher: name: University of British Columbia
Year: 2010

description: Given the presumed importance of cardiovascular reactivity and the role of anger in the development of hypertension and coronary heart disease, this study is the first to jointly examine three related areas (i.e. gender effects, anger direction preference, and opportunity/no opportunity to aggress following an anger Inducing situation). The present study tested the following hypotheses: a) that cardiovascular reactivity would vary as a function of subjects' gender and direction preference; b) that the rate of cardiovascular recovery would vary as a function of anger direction preference and opportunity/no opportunity to aggress; c) that the subjective feelings of anger after harassment would vary as a function of gender, anger direction preference, and opportunity/no opportunity to aggress; and d) that the evaluation of experimenter's competency and performance would vary as a function of anger preference. 56 females and 49 males executed a math task while being harassed for "poor performance". Next, they were randomly assigned to either write a negative evaluation of the frustrator or to copy a neutral paragraph and then to circle some letters in another paragraph. Heart rate and blood pressure were measured intermittently throughout. Subjects' preferred mode of anger expression (i.e. anger-in versus anger-out) had been previously assessed and cross validated by self as well as peer evaluations. Results indicated that gender was a better predictor than anger direction preference for cardiovascular reactivity to harassment. Complex patterns of recovery were detected with Intriguing sex differences. Results on male diastolic recovery were consistent with a matching hypothesis of anger direction preference but only for anger-out males. In addition, subjective anger for males was related to opportunity/no opportunity conditions, whereas females did not show such a relationship. Female anger-ln's showed quicker systolic recovery than anger-out's. Lastly, the evaluation of experimenter's competency and performance did not vary as a function of anger preference. Therapeutic implications of the findings within the context of anger control as well as trends for future research are discussed.
STUDY ON COMPOSITE HYDROGEL MIXTURE OF CALCIUM ALGINATE/GELATIN/KAPPA CARRAGEENAN FOR 3D BIOPRINTING
Creators: name: Moawad, Mina
Publisher: name: Zenodo
Year: 2021
Subjects: alginate
gelatin
carrageenan
calcium chloride
3d bioprinting
composite scaffolds

description: The field of regenerative medicine and tissue engineering is continuously advancing and utilizing new technologies to provide reliable solutions for replacing damaged tissues. Unlike subtractive manufacturing, Additive manufacturing became an answer for creating complex shapes for many fields like tissue engineering, which requires the need to create body parts that are not geometrically simple. Three-dimensional (3D) bioprinting technology is a great additive manufacturing tool that will significantly benefit the field of regenerative medicine and tissue engineering once precision and feasibility are achieved. Printing a 3D structure narrows the range of material choices in order to meet the criteria of biomaterials which are biocompatibility, biodegradability, printability, and low cytotoxicity. Hydrogels meet all requirements for biomaterials; however, they have weak mechanical properties that are hard to control, which makes it challenging to print a scaffold precisely, which restricts their chance to be used as a potential reliable 3D bioprinting material. In this paper, composite scaffolds composed of calcium alginate/gelatin/κ-carrageenan are printed using an extrusion-based 3D bioprinter. Different concentrations of all three hydrogels are prepared and crosslinked with calcium chloride to transform it from sodium alginate/gelatin/κ-carrageenan to calcium alginate/gelatin/κ-carrageenan then tested for their strength in tension and compression. Printability is also tested for all the different concentrations to find the best printing parameters in terms of pressure, print speed, layer height, and printing temperature. The composite hydrogel mixture composed of 2.2% (w/v) calcium alginate/ 1% (w/v) gelatin/ 4% (w/v) κ-carrageenan exhibited higher modulus of elasticity compared to the other tested concentrations and is printable using a 0.864 mm nozzle diameter, 62 °C printingtemperature, and 7 psi printing pressure.
Semileptonic decays of heavy baryons in the relativistic quark model
Creators: name: Ebert, D.
name: Faustov, R. N.
name: Galkin, V. O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Semileptonic decays of heavy baryons consisting of one heavy (Q=b,c) and two light (q=u,d,s) quarks are considered in the heavy-quark--light-diquark approximation. The relativistic quasipotential equation is used for obtaining masses and wave functions of both diquarks and baryons within the constituent quark model. The weak transition matrix elements are expressed through the overlap integrals of the baryon wave functions. The Isgur-Wise functions are determined in the whole accessible kinematic range. The exclusive semileptonic decay rates and different asymmetries are calculated with applying the heavy quark 1/m_Q expansion. The evaluated Lambda_b -> Lambda_c l nu decay rate agrees with its experimental value.
description: 22 pages, 9 figures