cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Noncommutative Poisson Algebra of Classical and Quantum Mechanics
Creators: name: Morchio, G.
name: Strocchi, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Lie-Rinehart algebra of a manifold M, defined by the Lie structure of the vector fields, their action and their module structure on the infinitely differentiable functions on M, is a common, diffeomorphism invariant, algebra for both classical and quantum mechanics. Its (noncommutative) Poisson universal enveloping algebra contains a central variable Z which relates the commutators to the Lie products; classical and quantum mechanics are its only factorial realizations, corresponding to the indentification of Z with i times the Planck constant. In this form, canonical quantization appears therefore as a consequence of such a general geometrical structure. The regular factorial Hilbert space representations are, for nonzero values of Z, unitarily equivalent, apart from multiplicity, to one of the irreducible quantum representations, which are locally Schroedinger and in one to one correspondence with the unitary irreducible representations of the fundamental group of M. For Z = 0, if Diff(M) is unitarily implemented, they are unitarily equivalent, up to multiplicity, to the representation defined by classical mechanics on M.
title: UniStore: Querying a DHT-based Universal Storage
Creators: name: Karnstedt, Marcel
name: Hauswirth, Manfred
Publisher: name: University of Galway
Year: 2007
Subjects: subject: Management information systems
subject: Internet
subject: Information storage and retrieval systems

description: In recent time, the idea of collecting and combining large public data sets and services became more and more popular. The special characteristics of such systems and the requirements of the participants demand for strictly decentralized solutions. However, this comes along with several ambitious challenges a corresponding system has to overcome. In this demonstration paper, we present a light-weight distributed universal storage capable of dealing with those challenges, and providing a powerful and flexible way of building Internet-scale public data management systems. We introduce our approach based on a triple storage on top of a DHT overlay system, based on the ideas of a universal relation model and RDF, outline solved challenges and open issues, and present usage as well as demonstration aspects of the platform.
On the Kullback-Leibler divergence between discrete normal distributions
Creators: name: Nielsen, Frank
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Discrete normal distributions are defined as the distributions with prescribed means and covariance matrices which maximize entropy on the integer lattice support. The set of discrete normal distributions form an exponential family with cumulant function related to the Riemann theta function. In this paper, we present several formula for common statistical divergences between discrete normal distributions including the Kullback-Leibler divergence. In particular, we describe an efficient approximation technique for calculating the Kullback-Leibler divergence between discrete normal distributions via the Rényi $α$-divergences or the projective $γ$-divergences.
description: 26 pages
title: A sentiment analysis dataset for code-mixed Malayalam-English
Creators: name: Chakravarthi, Bharathi Raja
name: Jose, Navya
name: Suryawanshi, Shardul
name: Sherly, Elizabeth
name: McCrae, John P.
Publisher: name: European Language Resources Association (ELRA)
Year: 2020
Subjects: subject: code-mixing
subject: Malayalam
subject: dataset
subject: sentiment analysis

description: There is an increasing demand for sentiment analysis of text from social media which are mostly code-mixed. Systems trained on monolingual data fail for code-mixed data due to the complexity of mixing at different levels of the text. However, very few resources are available for code-mixed data to create models specific for this data. Although much research in multilingual and cross-lingual sentiment analysis has used semi-supervised or unsupervised methods, supervised methods still performs better. Only a few datasets for popular languages such as English-Spanish, English-Hindi, and English-Chinese are available. There are no resources available for Malayalam-English code-mixed data. This paper presents a new gold standard corpus for sentiment analysis of code-mixed text in Malayalam-English annotated by voluntary annotators. This gold standard corpus obtained a Krippendorff’s alpha above 0.8 for the dataset. We use this new corpus to provide the benchmark for sentiment analysis in Malayalam-English code-mixed texts
A Scintillator Purification System for the Borexino Solar Neutrino Detector
Creators: name: Benziger, J.
name: Cadonati, L.
name: Calaprice, F.
name: Chen, M.
name: Corsi, A.
name: Dalnoki-Veress, F.
name: Fernholz, R.
name: Ford, R.
name: Galbiati, C.
name: Goretti, A.
name: Harding, E.
name: Ianni, Aldo
name: Ianni, Andrea
name: Kidner, S.
name: Leung, M.
name: Loeser, F.
name: McCarty, K.
name: McKinsey, D.
name: Nelson, A.
name: Pocar, A.
name: Salvo, C.
name: Schimizzi, D.
name: Shutt, T.
name: Sonnenschein, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Purification of the 278 tons of liquid scintillator and 889 tons of buffer shielding for the Borexino solar neutrino detector was performed with a system that combined distillation, water extraction, gas stripping and filtration. The purification of the scintillator achieved unprecedented low backgrounds for the large scale liquid scintillation detector. This paper describes the principles of operation, design, construction and commissioning of the purification system, and reviews the requirements and methods to achieve system cleanliness and leak-tightness.
description: submitted to Nucl. Instr. and Meth. A, revised after review
A laser-driven proton beamline at GSI
Creators: name: Busold, S.
name: Schumacher, D.
name: Deppert, O.
name: Brabetz, C.
name: Kroll, F.
name: Blazevic, A.
name: Bagnoud, V.
name: Hofmann, I.
name: Roth, M.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Eigensolution analysis of immersed boundary method based on volume penalization: applications to high-order schemes
Creators: name: Kou, Jiaqing
name: Hurtado-de-Mendoza, Aurelio
name: Joshi, Saumitra
name: Clainche, Soledad Le
name: Ferrer, Esteban
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: This paper presents eigensolution and non-modal analyses for immersed boundary methods (IBMs) based on volume penalization for the linear advection equation. This approach is used to analyze the behavior of flux reconstruction (FR) discretization, including the influence of polynomial order and penalization parameter on numerical errors and stability. Through a semi-discrete analysis, we find that the inclusion of IBM adds additional dissipation without changing significantly the dispersion of the original numerical discretization. This agrees with the physical intuition that in this type of approach, the solid wall is modelled as a porous medium with vanishing viscosity. From a stability point view, the selection of penalty parameter can be analyzed based on a fully-discrete analysis, which leads to practical guidelines on the selection of penalization parameter. Numerical experiments indicate that the penalization term needs to be increased to damp oscillations inside the solid (i.e. porous region), which leads to undesirable time step restrictions. As an alternative, we propose to include a second-order term in the solid for the no-slip wall boundary condition. Results show that by adding a second-order term we improve the overall accuracy with relaxed time step restriction. This indicates that the optimal value of the penalization parameter and the second-order damping can be carefully chosen to obtain a more accurate scheme. Finally, the approximated relationship between these two parameters is obtained and used as a guideline to select the optimum penalty terms in a Navier-Stokes solver, to simulate flow past a cylinder.
Is there a Supermassive Black Hole at the Center of the Milky Way?
Creators: name: Reid, Mark J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: This review outlines the observations that now provide an overwhelming scientific case that the center of our Milky Way Galaxy harbors a supermassive black hole. Observations at infrared wavelength trace stars that orbit about a common focal position and require a central mass (M) of 4 million solar masses within a radius of 100 Astronomical Units. Orbital speeds have been observed to exceed 5,000 km/s. At the focal position there is an extremely compact radio source (Sgr A*), whose apparent size is near the Schwarzschild radius (2GM/c^2). This radio source is motionless at the ~1 km/s level at the dynamical center of the Galaxy. The mass density required by these observations is now approaching the ultimate limit of a supermassive black hole within the last stable orbit for matter near the event horizon.
description: Invited review submitted to International Journal of Modern Physics D; 23 pages; 10 figures
Relations between anomalous diffusion and fluctuation scaling: The case of ultraslow diffusion and time-scale-independent fluctuation scaling in language
Creators: name: Watanabe, Hayafumi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Fluctuation scaling (FS) and anomalous diffusion have been discussed in different contexts, even though both are often observed in complex systems. To clarify the relationship between these concepts, we investigated approximately three billion Japanese blog articles over a period of six years and analyzed the corresponding Poisson process driven by a random walk model with power-law forgetting, which reproduces both the anomalous diffusion and the FS. From the analysis of the model, we have identified the relationship between the time-scale dependence of FS and characteristics of anomalous diffusion and showed that the time-scale-independent FS corresponds to essentially a logarithmic diffusion (i.e., a kind of ultraslow diffusion). In addition, we confirmed that this relationship is also valid for the actual data. This finding may contribute to the discovery of actual examples of ultraslow diffusion, which have been nearly unobserved in spite of many mathematical theories, because we can detect the time-scale-independent FS more easily and more distinctly than through direct detection of the logarithmic diffusion based on the mean squared displacement.
description: arXiv admin note: substantial text overlap with arXiv:1707.07066
Entanglement signatures of the quantum phase transition induced by a magnetic impurity in a superconductor
Creators: name: Sacramento, P. D.
name: Nogueira, P.
name: Vieira, V. R.
name: Dugaev, V. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The insertion of a magnetic impurity in a superconductor induces a first order quantum phase transition as the coupling to the electronic spin density increases. As the transition is crossed, a discontinuity is exhibited by various quantities, like the total spin density, the total gap function and the gap function at the impurity location. The location of other quantum phase transitions have been detected by singularities in entanglement measures of the system. In this work we show that the single-site and two-site von Neumann entropies, the mutual information and the Meyer-Wallach measure show discontinuities at the quantum phase transition. The negativity is less sensitive to the transition. We study in detail these quantities as a function of spin coupling and distance from the impurity center.
description: 14 pages, 12 figures
Northwest Coast traditional salmon fisheries systems of resource utilization
Creators: name: Berringer, Patricia Ann
Publisher: name: University of British Columbia
Year: 2010

description: The exploitation of salmon resources was once central to the economic life of the Northwest Coast. The organization of technological skills and information brought to the problems of salmon utilization by Northwest Coast fishermen was directed to obtaining sufficient calories to meet the requirements of staple storage foods and fresh consumption. This study reconstructs selective elements of the traditional salmon fishery drawing on data from the ethnographic record, journals, and published observations of the period prior to intensive white settlement. To serve the objective of an ecological perspective, technical references to the habitat and distribution of Pacific salmon (Oncorhynchus sp.) are included. The aim of the work is to assess the relationship of salmon technology complexes to ecological conditions at fishery sites. It is an examination of the operating principles in traditional systems of salmon production. A model of the fishery is suggested: during migration anadromous salmon pass through a number of time and space segments where they can be intercepted by fishermen. A coincidence of appropriate elements will define a fishery site, i.e., the characteristics of the prey, accessibility to resource locations, natural features of the environment, and the enterprise of fishermen. The interaction of these and their constituent variables provides a range of selective strategies to be used, analyzed in this study with reference to specific Northwest Coast ethnic divisions and geographic locations. Twenty-four ethnic or areal divisions within the Northwest Coast culture area were studied. The results of the research are presented in Part One supported by distribution maps and illustrative materials. Lists of reference tables for each of twelve systems of salmon production are contained in an Appendix. Part Two includes technical information about Oncorhynchus sp. and its habitat. Part Three is an analysis of social, ecological, and technological elements in several stages of inter-relation, including an interregional comparison in the final section. An Index of Salmon Abundance and a comparison of selected resource areas provide statistical evidence (Appendix II and III).
Spin orbit torque switching of antiferromagnet through the Neel reorientation in rare-earth ferrite
Creators: name: Kim, T. H.
name: Hwang, S.
name: Hamh, S. Y.
name: Yoon, S. H.
name: Han, S. H.
name: Cho, B. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We suggest coherent switching of canted antiferromagnetic (AFM) spins using spin-orbit torque (SOT) in small magnet. The magnetic system of orthoferrite features biaxial easy anisotropy and the Dzyaloshinskii Moriya interaction, which is perpendicular to the easy axes and therefore creates weak magnetization (m). A damping-like component of the SOT induces Néel reorientation along one of the easy axes and then exerts torque on m, leading to tilting of the Néel order l. The torque on the magnetization becomes stronger due to coupling with the induced Oersted field or the field-like component of the SOT, enhancing the tilting of l. Therefore, l is found to experience deterministic switching after the SOT is turned off. Based upon both numerical and analytical analysis of the coherent switching, XOR logic gates are also found to be implemented in a single magnetic layer. In addition, we investigate how magnetic parameters affect the critical reorientation angle and current density in a simple layered structure of platinum and a canted AFM. Our findings are expected to provide an alternative spin-switching mechanism for ultrafast applications such as spin logic and electronic devices.
Additional file 1 of Characterization of bariatric surgery and outcomes using administrative claims data in the research network of a nationwide commercial health plan
Creators: name: Ma, Qinli
name: Mack, Michael
name: Shambhu, Sonali
name: McTigue, Kathleen
name: Haynes, Kevin
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy

description: Additional file 1.
Large-angle production of charged pions with 3-12.9 GeV/c incident protons on nuclear targets
Creators: name: HARP Collaboration
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Measurements of the double-differential charged pion production cross-section in the range of momentum 100 MeV/c < p < 800 MeV/c and angle 0.35 < θ< 2.15 rad in proton-beryllium, proton-carbon, proton-aluminium, proton-copper, proton-tin, proton-tantalum and proton-lead collisions are presented. The data were taken with the large acceptance HARP detector in the T9 beam line of the CERN PS. The pions were produced by proton beams in a momentum range from 3 GeV/c to 12.9 GeV/c hitting a target with a thickness of 5% of a nuclear interaction length.
Webarchivierung - Berlin-Brandenburgische Akademie der Wissenschaften
Creators: name: Markus, Schnöpf.
Publisher: name: Zenodo
Year: 2022
Subjects: International Open Access Week 2022
Open Access
Berlin
BBAW

description: Als Teil des aktiven Forschungsdatenmanagements werden im Datenzentrum der Berlin-Brandenburgischen Akademie der Wissenschaften (BBAW) seit mehreren Jahren Webpräsenzen digital gesichert und der Nachwelt vorgehalten. An der BBAW werden mindestens seit Mitte der 1990er digitale Projekte in den Akademienvorhaben durchgeführt, wie z.B. das digitale Turfan-Archiv, die Berliner Klassik oder auch die Jahresberichte für deutsche Geschichte. Digitale Informationssysteme haben sich seitdem fundamental geändert, neue Programmiersprachen wurden eingeführt, alte Programmiersprachen werden nicht mehr von den Betriebssystemen unterstützt. Auch die eingesetzten Webtechnologien haben sich seitdem geändert. In der Informationswissenschaft wird die Zeitspanne für digitale Langzeitspeicherung mit fünf Jahren angegeben. Die geisteswissenschaftlichen Grundlagenvorhaben der Akademie produzieren jedoch wissenschaftliche Ergebnisse, deren zeitliche Geltungsdauer eher mit Jahrzehnten, wenn nicht Jahrhunderten angegeben werden kann. Digitale Projektergebnisse sind flüchtig und werden (noch) nicht ausreichend langfristig kuratiert, wie dies bei Büchern in Jahrhunderte alten Bibliotheken oder in Archiven der Fall ist. Die digitale Konservierung von Webseiten findet bei TELOTA im Datenzentrum statt. Webseiten der Akademie, deren technische Erneuerung nicht mehr möglich ist, werden im Web ARChive (WARC) Archivformat gesichert und publiziert. Bis zum heutigen Tage wurden so ca. 100 Websites webarchiviert.
Inclusive inelastic electron scattering from nuclei
Creators: name: Fomin, Nadia
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Inclusive electron scattering from nuclei at large x and $Q^2$ is the result of a reaction mechanism that includes both quasi--elastic scattering from nucleons and deep inelastic scattering from the quark constituents of the nucleons. Data in this regime can be used to study a wide variety of topics, including the extraction of nuclear momentum distributions, the influence of final state interactions and the approach to $y$-scaling, the strength of nucleon-nucleon correlations, and the approach to $x$- scaling, to name a few. Selected results from the recent experiment E02-019 at the Thomas Jefferson National Accelerator Facility will be shown and their relevance discussed.
description: Prepared for 7th Latin American Symposium on Nuclear Physics and Applications, Cusco, Peru, 11-16 Jun 2007
D5.3.1 Set of tools supporting ECOSS case studies and activities
Creators: name: Oggioni, Alessandro
name: Tagliolato, Paolo
name: Sarretta, Alessandro
name: De Maio, Elisabeth
name: Menegon, Stefano
name: Manea, Elisabetta
name: Bergami, Caterina
name: Pugnetti, Alessandra
name: Partnership, The ECOSS
Publisher: name: Zenodo
Year: 2021

description: ECOSS Tools aims at providing interactive applications to respond to the needs of the sites involved in the ECOlogical observing system in the Adriatic Sea (ECOAdS) for the conservation strategies of the Natura 2000 sites and the contribution to the main EU directives. The ECOSS Tools provide graphical representations of monitoring activities at the sites, leveraging the information collected by the ECOSS project by means of their integration with other information sources already available on the internet.
description: ECOSS project (Observing System in the Adriatic Sea: oceanographic observations for biodiversity) is an EU 2014–2020 Interreg V-A Italy-Croatia CBC programme ID number 10042301
Additional file 1 of Discrepancies in decision making preferences between parents and surgeons in pediatric surgery
Creators: name: Carlisle, Erica M.
name: Klipowicz, Caleb J.
name: Shinkunas, Laura A.
name: Scherer, Aaron M.
name: Kaldjian, Lauris C.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Appendix A and B. Parent and surgeon surveys.
The Higgs Decay Width in Multi-Scalar Doublet Models
Creators: name: Mantry, Sonny
name: Trott, Michael
name: Wise, Mark B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that there are regions of parameter space in multi-scalar doublet models where, in the first few hundred inverse femtobarns of data, the new charged and neutral scalars are not directly observable at the LHC and yet the Higgs decay rate to b bbar is changed significantly from its standard model value. For a light Higgs with a mass less than 140 GeV, this can cause a large change in the number of two photon and tau tau Higgs decay events expected at the LHC compared to the minimal standard model. In the models we consider, the principle of minimal flavor violation is used to suppress flavor changing neutral currents. This paper emphasizes the importance of measuring the properties of the Higgs boson at the LHC; for a range of parameters the model considered has new physics at the TeV scale that is invisible, in the first few hundred inverse femtobarns of integrated luminosity at the LHC, except indirectly through the measurement of Higgs boson properties.
description: 18 pages, 3 figures V2: refs added
On The Universality Of Central Loops
Creators: name: Jaiyeola, Temitope Gbolahan
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 20NO5 ; 08A05

description: LC-loops, RC-loops and C-loops are collectively called central loops. It is shown that an LC(RC)-loop is a left(right) universal loop. But an LC(RC)-loop is a universal loop if and only if it is a right(left) universal loop. It is observed that not all RC-loops or LC-loops or C-loops are universal loops. But if an RC-loop(LC-loop, C-loop) is universal, then it is a right Bol loop(left Bol loop, Moufang loop) respectively. If a loop and its right or left isotope are commutative then the loop is a C-loop if and only if its right or left isotope is a C-loop. If a C-loop is central square and its right or left isotope is an alternative central square loop, then the latter is a C-loop. Necessary and sufficient condition for an LC-loop(RC-loop) to be a left(right)G-loop is established. Consequently, necessary and sufficient conditions for an LC-loop, and an RC-loop to be a G-loop are established. A necessary and sufficient condition for a C-loop to be a G-loop is established.
description: 11 pages, submitted for publication
Additional file 1 of Comprehensive analysis of allergen-specific IgE in COPD: mite-specific IgE specifically related to the diagnosis of asthma-COPD overlap
Creators: name: Toyota, Hikaru
name: Sugimoto, Naoya
name: Konomi Kobayashi
name: Suzuki, Yuki
name: Takeshita, Yuri
name: Ito, Ayaka
name: Ujino, Mariko
name: Fuminori Tomyo
name: Sakasegawa, Hirokazu
name: Koizumi, Yuta
name: Kuramochi, Michio
name: Yamaguchi, Masao
name: Nagase, Hiroyuki
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 1 Features of COPD or asthma described by the Japanese Respiratory Society Guideline
Pilates versus resistance exercise on the serum levels of hs-CRP, in the abdominal circumference and body mass index (BMI) in elderly individuals
Creators: name: Pestana, Maria Dida Silva
name: Netto, Eduardo Martins
name: Silva Pestana, Manuella Castro
name: Silva Pestana, Vitor
name: Schinoni, Maria Isabel
Publisher: name: Motricidade
Year: 2016

description: Recent studies have shown that the elderly exhibit a subclinical state of inflammation associated with increased adipose tissue and several comorbidities. To compare the effects of mat Pilates based exercises and resistance exercise on the serum levels of reactive C protein of high sensitivity (hs-CRP), in the abdominal circumference (AC) and the body mass index (BMI) in the elderly. It is a randomised clinical trial with a sample of 78 elderly individuals (median age 69 years). The active independent variable investigated was nature of treatment intervention (Pilates mat based exercises vs resistance exercise), and the dependent variables were hs-CRP level, AC and BMI. The statistical analysis used Wilcoxon signed rank and Mann-Whitney tests. The correlation between the continuous variables was assessed using Spearman’s coefficient of correlation. The data were analysed using SPSS software version 17.0, and probability values lower than 5% (p< 0.05) were considered statistically significant. Mat Pilates based exercises exhibited reductions in serum hs-CPR level (Wilcoxon signed rank test; z = -2.466, p = 0.01), BMI (Wilcoxon signed rank test; z = -3.295, p = 0.001) and AC (Wilcoxon signed rank test; z = -3.398, p = 0.01). Mat Pilates based exercises promoted a significant reduction of the serum hs-CRP levels and anthropometric measurements in elderly individuals.
description: Motricidade, Vol 12 No 1 (2016)
Learning of a postural control task by elderly post-stroke patients
Creators: name: Bonuzzi, Giordano Marcio Gatinho
name: Freitas, Tatiana Beline
name: Corrêa, Umberto Cesar
name: Freudenheim, Andrea Michele
name: Pompeu, José Eduardo
name: Torriani-Pasin, Camila
Publisher: name: Motricidade
Year: 2016

description: The aim of this study was to compare the learning process of a postural control task between post-stroke patients and healthy subjects. The sample was composed of 20 post-stroke individuals (Experimental Group) and 20 aged matched healthy individuals (Control Group). Participants practiced a postural control task in a virtual environment with increasing of complexity. The study design involved four phases: pre-test (five trials), acquisition phase (four blocks of thirty minutes), post-test (five trials), and retention test (five trials after a week without practice). The statistical analysis was run by a 2 x 3 ANOVA (groups x learning tests). Results: There was no difference in motor learning between Experimental Group and Control Group (F= 41.22; p=0.88). In addition, it was founded that the Control Group could learn the task in a higher-level complexity than Experimental Group (F = 4.77; p = 0.01), and both groups increased the error during the trials of practice (F = 0.53; p = 0.00) because of task complexity.  Conclusion: Therefore has been found that post-stroke individuals have the ability to learn a postural control task similar to healthy subjects, and the task complexity seems to be a key-factor in order to differentiate stroke from healthy subject's motor learning process.
description: Motricidade, Vol 12 No 1 (2016)
Rechargeable self-assembled droplet microswimmers driven by surface phase transitions
Creators: name: Cholakova, Diana
name: Lisicki, Maciej
name: Smoukov, Stoyan K.
name: Tcholakova, Slavka
name: Lin, E. Emily
name: Chen, Jianxin
name: De Canio, Gabriele
name: Lauga, Eric
name: Denkov, Nikolai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The design of artificial microswimmers is often inspired by the strategies of natural microorganisms. Many of these creatures exploit the fact that elasticity breaks the time-reversal symmetry of motion at low Reynolds numbers, but this principle has been notably absent from model systems of active, self-propelled microswimmers. Here we introduce a class of microswimmer that spontaneously self-assembles and swims without using external forces, driven instead by surface phase transitions induced by temperature variations. The swimmers are made from alkane droplets dispersed in aqueous surfactant solution, which start to self-propel upon cooling, pushed by rapidly growing thin elastic tails. When heated, the same droplets recharge by retracting their tails, swimming for up to tens of minutes in each cycle. Thermal oscillations of approximately 5 degrees Celsius induce the swimmers to harness heat from the environment and recharge multiple times. We develop a detailed elastohydrodynamic model of these processes and highlight the molecular mechanisms involved. The system offers a convenient platform for examining symmetry breaking in the motion of swimmers exploiting flagellar elasticity. The mild conditions and biocompatible media render these microswimmers potential probes for studying biological propulsion and interactions between artificial and biological swimmers.
description: Supplementary information available
Tradução e Validação do Movement Imagery Questionnaire – 3 (MIQ - 3) com Atletas Portugueses
Creators: name: Mendes, Pedro Alexandre
name: Marinho, Daniel A.
name: Petrica, João Duarte
name: Silveira, Paulo
name: Monteiro, Diogo
name: Cid, Luis
Publisher: name: Motricidade
Year: 2016

description: Imagery é um processo cognitivo que pode desempenhar um papel importante no planeamento e execução de movimentos ou ações. Vários instrumentos têm sido desenvolvidos com o intuito de avaliar a habilidade de Imagery no desporto. No entanto, nenhum se focou na modalidade cinestésica, visual interna e visual externa. O objetivo deste estudo foi traduzir e validar preliminarmente para a população desportiva portuguesa o Movement Imagery Questionnaire-3, determinando as suas qualidades psicométricas iniciais através de uma análise fatorial exploratória do modelo que a suporta. A amostra foi constituída por 176 sujeitos (N = 176) (sexo masculino N = 134; sexo feminino N = 42) com uma média de idades de 20.08 anos (SD = 5.94), composta por atletas de futebol (N = 113), basquetebol (N = 43) e ténis (N = 20). Numa primeira fase verificou-se que os procedimentos de tradução e adaptação originaram uma versão Portuguesa do MIQ - 3 semelhante à versão original. Numa segunda fase verificamos que as qualidades psicométricas comprovam a adequação da adaptação efetuada, demonstrando que a sua estrutura fatorial é igual à versão original (12 itens agrupados em 3 fatores, com 4 itens cada fator), apresentando índices bastante aceitáveis de validade e fiabilidade (alfa de Cronbach: 0.88 para MIQ - 3, 0.79 para as três modalidades), concluindo que este questionário poderá ser utilizado para avaliar a capacidade de Imagery em atletas Portugueses.
description: Motricidade, Vol 12 No 1 (2016)
Hyperbolic Metamaterials and Massive Klein-Gordon Equation in 2+1 Dimensional de Sitter Spacetime
Creators: name: Tekin, Bayram
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The wave equation obeyed by the extraordinary component of the electric field in a hyperbolic metamaterial was shown to be a massless Klein-Gordon field living in a flat spacetime with two timelike and two spacelike dimensions. Such a wave equation, unexpectedly, allows dispersionless propagation albeit having two spatial dimensions. Here we show that the same equation can be naturally interpreted as a particular massive Klein-Gordon equation with the usual one timelike and two spacelike dimensions in a de Sitter (dS) background spacetime. The mass parameter of the scalar field is given in terms of the cosmological constant, Planck constant and the speed of light as $m =\sqrtΛ\frac{\hbar}{c}$ which corresponds to the point for which the left and right conformal weights of the boundary conformal field theory (CFT) (via the de Sitter/CFT correspondence) are equal. This particular mass corresponds to the gapless mode in the dS spacetime for which the dispersion relation is linear in the wave number.
description: 3 pages; slightly extended, v2 matches the published version
Causal Inference in Non-linear Time-series using Deep Networks and Knockoff Counterfactuals
Creators: name: Ahmad, Wasim
name: Shadaydeh, Maha
name: Denzler, Joachim
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Estimating causal relations is vital in understanding the complex interactions in multivariate time series. Non-linear coupling of variables is one of the major challenges inaccurate estimation of cause-effect relations. In this paper, we propose to use deep autoregressive networks (DeepAR) in tandem with counterfactual analysis to infer nonlinear causal relations in multivariate time series. We extend the concept of Granger causality using probabilistic forecasting with DeepAR. Since deep networks can neither handle missing input nor out-of-distribution intervention, we propose to use the Knockoffs framework (Barberand Cand`es, 2015) for generating intervention variables and consequently counterfactual probabilistic forecasting. Knockoff samples are independent of their output given the observed variables and exchangeable with their counterpart variables without changing the underlying distribution of the data. We test our method on synthetic as well as real-world time series datasets. Overall our method outperforms the widely used vector autoregressive Granger causality and PCMCI in detecting nonlinear causal dependency in multivariate time series.
Multiparticle entanglement under the influence of decoherence
Creators: name: Gühne, O.
name: Bodoky, F.
name: Blaauboer, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a method to determine the decay of multiparticle quantum correlations as quantified by the geometric measure of entanglement under the influence of decoherence. With this, we compare the robustness of entanglement in GHZ-, cluster-, W- and Dicke states of four qubits and show that the Dicke state is most robust. Finally, we determine the geometric measure analytically for decaying GHZ and cluster states of an arbitrary number of qubits.
description: 5 pages, 3 figures, v2: final version, to appear as a Rapid Communication in PRA
Coherent population transfer in a chain of tunnel coupled quantum dots
Creators: name: Petrosyan, David
name: Lambropoulos, P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the dynamics of a single electron in a chain of tunnel coupled quantum dots, exploring the formal analogies of this system with some of the laser-driven multilevel atomic or molecular systems studied by Bruce W. Shore and collaborators over the last 30 years. In particular, we describe two regimes for achieving complete coherent transfer of population in such a multistate system. In the first regime, by carefully arranging the coupling strengths, the flow of population between the states of the system can be made periodic in time. In the second regime, by employing a "counterintuitive" sequence of couplings, the coherent population trapping eigenstate of the system can be rotated from the initial to the final desired state, which is an equivalent of the STIRAP technique for atoms or molecules. Our results may be useful in future quantum computation schemes.
The B-type Binaries Characterisation Programme I. Orbital solutions for the 30 Doradus population
Creators: name: Villaseñor, J. I.
name: Taylor, W. D.
name: Evans, C. J.
name: Ramírez-Agudelo, O. H.
name: Sana, H.
name: Almeida, L. A.
name: de Mink, S. E.
name: Dufton, P. L.
name: Langer, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present results from the B-type Binaries Characterisation (BBC) programme, a multi-epoch spectroscopic study of 88 early B-type binary candidates in the 30 Doradus region of the Large Magellanic Cloud (LMC). From radial-velocity analysis of 29 observational epochs we confirm the binary status of 64 of our targets, comprising 50 SB1 and 14 SB2 B-type binaries. A further 20 systems (classified as SB1*) show clear signs of periodicity but with more tentative periods. Orbital solutions are presented for these 84 systems, providing the largest homogeneous sample to date of the binary properties of early B-type stars. Our derived orbital-period distribution is generally similar to those for samples of more massive (O-type) binaries in both the LMC and the Galaxy. This similarity with the properties of the more massive O-type binaries is important as early B-type stars are expected to account for the majority of core-collapse supernovae. Differences in the period distributions of the different samples start to increase above 4 d, and are also present between the earliest (B0-0.7) and later-type (B1-2.5) systems within the BBC sample, although further study is required to understand if this is an observational bias or a real physical effect. We have examined the semi-amplitude velocities and orbital periods of our sample to identify potential candidates that could hide compact companions. Comparing with probability distributions of finding black hole companions to OB-type stars from a recent theoretical study, we have found 16 binaries in the higher probability region that warrant further study.
description: 42 pages (main body: 28 pages, supplementary material: 14 pages), 20 figures. Accepted for publication in MNRAS
Additional file 3 of Comprehensive analysis of allergen-specific IgE in COPD: mite-specific IgE specifically related to the diagnosis of asthma-COPD overlap
Creators: name: Toyota, Hikaru
name: Sugimoto, Naoya
name: Konomi Kobayashi
name: Suzuki, Yuki
name: Takeshita, Yuri
name: Ito, Ayaka
name: Ujino, Mariko
name: Fuminori Tomyo
name: Sakasegawa, Hirokazu
name: Koizumi, Yuta
name: Kuramochi, Michio
name: Yamaguchi, Masao
name: Nagase, Hiroyuki
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Additional file 3 Comparison of patient characteristics based on positivity for allergen specific IgE
Subleading and non-holomorphic corrections to N=2 BPS black hole entropy
Creators: name: Cardoso, G. L.
name: de Wit, B.
name: Mahapatra, S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: BPS black hole degeneracies can be expressed in terms of an inverse Laplace transform of a partition function based on a mixed electric/magnetic ensemble, which involves a non-trivial integration measure. This measure has been evaluated for black holes with various degrees of supersymmetry and for N=4 supersymmetric black holes all results agree. It generally receives contributions from non-holomorphic corrections. An explicit evaluation of these corrections in the context of the effective action of the FHSV model reveals that these are related to, but quantitatively different from, the non-holomorphic corrections to the topological string, indicating that the relation between the twisted partition functions of the latter and the effective action is more subtle than has so far been envisaged. The effective action result leads to a duality invariant BPS free energy and arguments are presented for the existence of consistent non-holomorphic deformations of special geometry that can account for these effects. A prediction is given for the measure based on semiclassical arguments for a class of N=2 black holes. Furthermore an attempt is made to confront some of the results of this paper to a recent proposal for the microstate degeneracies of the STU model.
description: 45 pages, minor changes
Status and Results of the TFS for SIS18/SIS100
Creators: name: Alhumaidi, M.
name: Blell, U.
name: Florenkowski, J.
name: Kornilov, V.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Retrofitting of a non-invasive Bunch Shape Monitor for GSI LINACs
Creators: name: Zwicker, B.
name: Dorn, C.
name: Forck, P.
name: Kester, O.
name: Kowina, P.
Publisher: name: GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
Year: 2014
Subjects: Physics

description: GSI Scientific Report 2013 - GSI Report 2014-1
Transição dos Atletas na Carreira Desportiva: Da Teoria à Avaliação
Creators: name: Gomes, Rui
name: Domingues, Márcio
Publisher: name: Motricidade
Year: 2016

description: Este trabalho analisa a transição dos atletas no desporto, propondo um modelo compreensivo da transição desportiva e um instrumento de avaliação para analisar as transições desportivas dos atletas ao longo da carreira desportiva. Assim, do ponto de vista conceptual descreve-se o Modelo Interativo de Adaptação Humana à Transição Desportiva, que entende este fenómeno como um processo constituído pelos seguintes fatores: (a) circunstâncias da transição desportiva, (b) processos de avaliação cognitiva, (c) respostas ocorridas durante a situação de transição, e (d) resultado final da situação de transição. De seguida, é proposto um guião de entrevista para avaliar a transição desportiva, avaliando seis dimensões: (a) situação de transição, (b) recursos externos disponíveis, (c) mudanças enfrentadas, (d) processos de avaliação cognitiva, (e) respostas psicológicas, fisiológicas e comportamentais, e (f) resultado final da adaptação desportiva. A conjugação de modelos teóricos e instrumentos de avaliação acerca da transição desportiva podem ajudar a compreender este fenómeno.
description: Motricidade, Vol 12 No 1 (2016)
Férias do treino? Cuidado, 2 semanas de interrupção provocam alterações fisiológicas e psicobiológicas!
Creators: name: Leite, Geovana Silva Fogaça
name: De Mello, Marco Tulio
name: Tufik, Segio
name: Antunes, Hanna Karen Moreira
Publisher: name: Motricidade
Year: 2016

description: Para investigar o impacto de duas semanas de destreino na capacidade aeróbia e nas respostas psicobiológicas de corredores, 16 voluntários adultos foram recrutados. Após uma avaliação clínica, os voluntários foram submetidos a uma avaliação da composição corporal, coleta de sangue, teste ergoespirométrico máximo inicial e posteriormente outro em carga constante na intensidade do limiar ventilatório 1 (LV-1), e responderam questionários que avaliaram a ansiedade, perfil de humor e dependência de exercício. Uma semana após o término dessas avaliações, os voluntários foram submetidos a um período de destreino sustentado por duas semanas, e ao término, foram avaliados utilizando o mesmo procedimento inicial. Os resultados revelaram que o destreino causou diminuição no consumo de oxigênio e na ventilação em 9.1 e 8.6% respectivamente, além disso, o destreino aumentou os sintomas negativos de humor como ansiedade, tensão, depressão e diminuiu o vigor. Após a realização do exercício, houve alívio dos sintomas negativos de humor e aumento do vigor. Conclui-se que a interrupção do treino por um período curto de duas semanas provoca diminuição na capacidade aeróbia e alterações psicobiológicas.
description: Motricidade, Vol 12 No 1 (2016)
A influência do carboidrato na ativação cerebral durante exercício físico
Creators: name: Castanho, Gabriela Kaiser Fullin
name: Fontes, Eduardo Bodnariuc
name: Machado De Campos, Brunno
name: Chiminazzo, João Guilherme Cren
name: Fernandes, Paula Teixeira
Publisher: name: Motricidade
Year: 2016

description: O uso de carboidrato (CHO) como suplemento nutricional está relacionado com melhor rendimento esportivo. Alguns estudos observaram relação entre consumo e ativação cerebral que influenciam o rendimento. Assim, o objetivo desse estudo foi avaliar a influência do consumo de CHO na ativação de determinadas áreas cerebrais durante exercício físico, realizado juntamente à aquisição de ressonância magnética funcional (RMf). Dez homens ciclistas (32,1 ± 4,1 anos, peso 76,8 ± 14,6 kg) realizaram um protocolo de exercício de pedalada, com alta intensidade (Escala de Borg), em cicloergômetro acoplado à ressonância magnética (RM) e, ingeriram 50g de CHO ou de placebo no intervalo de duas séries de exercício. A ingestão de CHO apresentou influência nas áreas cerebrais durante o exercício, ativando áreas relacionadas à tomada de decisões (insula) e motivação (sistema límbico) e desativando principalmente áreas motoras (lobo frontal) e de introspecção (precuneos). Com o consumo de placebo, também houve ativação de áreas importantes relacionadas à motivação do individuo (cíngulo posterior). Além disso, as áreas relacionadas com a iniciação e manutenção de movimento, localizadas no lobo frontal e cerebelo, apresentaram-se ativas. Com o CHO, áreas importantes para a manutenção do exercício foram ativadas (BOLD positivo), mostrando que a suplementação pode ter influência na ativação cerebral durante o exercício de forma que melhore o rendimento esportivo.
description: Motricidade, Vol 12 No 1 (2016)
When Janson meets McDiarmid: Bounded difference inequalities under graph-dependence
Creators: name: Zhang, Rui-Ray
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We establish concentration inequalities for Lipschitz functions of dependent random variables, whose dependencies are specified by forests. We also give concentration results for decomposable functions, improving Janson's Hoeffding-type inequality for the summation of graph-dependent bounded variables. These results extend McDiarmid's bounded difference inequality to the dependent cases.
description: To appear in Statistics & Probability Letters