cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The mass of a Lifshitz black hole
Creators: name: Giribet, Gaston
name: Lavia, Edmundo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that massive 3D gravity admits solutions that describe Lifshitz black holes as those considered in non-relativistic holography. However, the determination of the mass of such black holes remained unclear as many different results were reported in the literature presenting discrepancies. Here, by using a robust method that permits to tackle the problem in the strong field regime, we determine the correct mass of the Lifshitz black hole of the higher-derivative massive gravity and compare it with other results obtained by different methods. Positivity of the mass spectrum demands an odd normalization of the gravity action. In spite of this fact, the result turns out to be consistent with computations inspired in holography.
description: 12 pages. No figures
Dynamic Relation Repairing for Knowledge Enhancement
Creators: name: Kang, Rui
name: Wang, Hongzhi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Dynamic relation repair aims to efficiently validate and repair the instances for knowledge graph enhancement (KGE), where KGE captures missing relations from unstructured data and leads to noisy facts to the knowledge graph. With the prosperity of unstructured data, an online approach is asked to clean the new RDF tuples before adding them to the knowledge base. To clean the noisy RDF tuples, graph constraint processing is a common but intractable approach. Plus, when adding new tuples to the knowledge graph, new graph patterns would be created, whereas the explicit discovery of graph constraints is also intractable. Therefore, although the dynamic relation repair has an unfortunate hardness, it is a necessary approach for enhancing knowledge graphs effectively under the fast-growing unstructured data. Motivated by this, we establish a dynamic repairing and enhancing structure to analyze its hardness on basic operations. To ensure dynamic repair and validation, we introduce implicit graph constraints, approximate graph matching, and linkage prediction based on localized graph patterns. To validate and repair the RDF tuples efficiently, we further study the cold start problems for graph constraint processing. Experimental results on real datasets demonstrate that our proposed approach can capture and repair instances with wrong relation labels dynamically and effectively.
description: 12 Pages
Kinetic regulation of coated vesicle secretion
Creators: name: Foret, Lionel
name: Sens, Pierre
Publisher: name: arXiv
Year: 2008
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The secretion of vesicles for intracellular transport often rely on the aggregation of specialized membrane-bound proteins into a coat able to curve cell membranes. The nucleation and growth of a protein coat is a kinetic process that competes with the energy-consuming turnover of coat components between the membrane and the cytosol. We propose a generic kinetic description of coat assembly and the formation of coated vesicles, and discuss its implication to the dynamics of COP vesicles that traffic within the Golgi and with the Endoplasmic Reticulum. We show that stationary coats of fixed area emerge from the competition between coat growth and the recycling of coat components, in a fashion resembling the treadmilling of cytoskeletal filaments. We further show that the turnover of coat components allows for a highly sensitive switching mechanism between a quiescent and a vesicle producing membrane, upon a slowing down of the exchange kinetics. We claim that the existence of this switching behaviour, also triggered by factors such as the presence of cargo and variation of the membrane mechanical tension, allows for efficient regulation of vesicle secretion. We propose a model, supported by different experimental observations, in which vesiculation of secretory membranes is impaired by the energy consuming desorption of coat proteins, until the presence of cargo or other factors triggers a dynamical switch into a vesicle producing state.
description: 6 pages 4 figures accepted at PNAS
Convective core sizes in rotating massive stars: I. Constraints from solar metallicity OB field stars
Creators: name: Martinet, S.
name: Meynet, G.
name: Ekström, S.
name: Simón-Díaz, S.
name: Holgado, G.
name: Castro, N.
name: Georgy, C.
name: Eggenberger, P.
name: Buldgen, G.
name: Salmon, S.
name: Hirschi, R.
name: Groh, J.
name: Farrell, E.
name: Murphy, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Spectroscopic studies of Galactic O and B stars show that many stars with masses above 8 M$_{\odot}$ are observed in the HR diagram just beyond the Main-Sequence (MS) band predicted by stellar models computed with a moderate overshooting. This may be an indication that the convective core sizes in stars in the upper part of the HR diagram are larger than predicted by these models. Combining stellar evolution models and spectroscopic parameters derived for a large sample of Galactic O and B stars, including brand new information about their projected rotational velocities, we reexamine the question of the convective core size in MS massive stars. We confirm that for stars more massive than about 8 M$_{\odot}$, the convective core size at the end of the MS phase increases more rapidly with the mass than in models computed with a constant step overshoot chosen to reproduce the main sequence width in the low mass range (around 2 M$_{\odot}$). This conclusion is valid for both the cases of non-rotating models and rotating models either with a moderate or a strong angular momentum transport. The increase of the convective core mass with the mass obtained from the TAMS position is, however, larger than the one deduced from the surface velocity drop for masses above about 15 M$_{\odot}$. Although observations available at the moment cannot decide what is the best choice between the core sizes given by the TAMS and the velocity drop, we discuss different methods to get out of this dilemma. At the moment, comparisons with eclipsing binaries seem to favor the solution given by the velocity drop. While we confirm the need for larger convective cores at higher masses, we find tensions in-between different methods for stars more massive than 15 M$_{\odot}$. The use of single-aged stellar populations (non-interacting binaries or stellar clusters) would be a great asset to resolve this tension.
description: 13 pages, 8 figures
Non-Hermitian oscillator Hamiltonian and su(1,1): a way towards generalizations
Creators: name: Quesne, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The family of metric operators, constructed by Musumbu {\sl et al} (2007 {\sl J. Phys. A: Math. Theor.} {\bf 40} F75), for a harmonic oscillator Hamiltonian augmented by a non-Hermitian $\cal PT$-symmetric part, is re-examined in the light of an su(1,1) approach. An alternative derivation, only relying on properties of su(1,1) generators, is proposed. Being independent of the realization considered for the latter, it opens the way towards the construction of generalized non-Hermitian (not necessarily $\cal PT$-symmetric) oscillator Hamiltonians related by similarity to Hermitian ones. Some examples of them are reviewed.
description: 11 pages, no figure; changes in title and in paragraphs 3 and 5; final published version
Dynamical symmetries of two-dimensional systems in relativistic quantum mechanics
Creators: name: Zhang, Fu-Lin
name: Song, Ci
name: Chen, Jing-Ling
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The two-dimensional Dirac Hamiltonian with equal scalar and vector potentials has been proved commuting with the deformed orbital angular momentum $L$. When the potential takes the Coulomb form, the system has an SO(3) symmetry, and similarly the harmonic oscillator potential possesses an SU(2) symmetry. The generators of the symmetric groups are derived for these two systems separately. The corresponding energy spectra are yielded naturally from the Casimir operators. Their non-relativistic limits are also discussed.
description: 3 pages, Accepted by Annals of Physics (New York)
Bayesian Selection of sign(mu) within mSUGRA in Global Fits Including WMAP5 Results
Creators: name: Feroz, F.
name: Allanach, B. C.
name: Hobson, M. P.
name: AbdusSalam, S. S.
name: Trotta, R.
name: Weber, A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the properties of the constrained minimal supersymmetric standard model (mSUGRA) by performing fits to updated indirect data, including the relic density of dark matter inferred from WMAP5. In order to find the extent to which mu < 0 is disfavoured compared to mu > 0, we compare the Bayesian evidence values for these models, which we obtain straightforwardly and with good precision from the recently developed multi-modal nested sampling ('MultiNest') technique. We find weak to moderate evidence for the mu > 0 branch of mSUGRA over mu < 0 and estimate the ratio of probabilities to be P(mu > 0)/P(mu < 0) = 6-61 depending on the prior measure and range used. There is thus positive (but not overwhelming) evidence that mu > 0 in mSUGRA. The MultiNest technique also delivers probability distributions of parameters and other relevant quantities such as superpartner masses. We explore the dependence of our results on the choice of the prior measure used. We also use the Bayesian evidence to quantify the consistency between the mSUGRA parameter inferences coming from the constraints that have the largest effects: (g-2)_mu, BR(b -> s gamma) and cold dark matter (DM) relic density Omega_{DM}h^2.
description: 28 pages, 8 figures, minor revision, accepted for publication in JHEP
Rotating vortex dipoles in ferromagnets
Creators: name: Komineas, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Vortex-antivortex pairs are localized excitations and have been found to be spontaneously created in magnetic elements. In the case that the vortex and the antivortex have opposite polarities the pair has a nonzero topological charge, and it behaves as a rotating vortex dipole. We find theoretically, and confirm numerically, the form of the energy as a function of the angular momentum of the system and the associated rotation frequencies. We discuss the process of annihilation of the pair which changes the topological charge of the system by unity while its energy is monotonically decreasing. Such a change in the topological charge affects profoundly the dynamics in the magnetic system. We finally discuss the connection of our results with Bloch Points (BP) and the implications for BP dynamics.
description: 6 pages, 2 figures
Theory of the optical absorption of light carrying orbital angular momentum by semiconductors
Creators: name: Quinteiro, G. F.
name: Tamborenea, P. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We develop a free-carrier theory of the optical absorption of light carrying orbital angular momentum (twisted light) by bulk semiconductors. We obtain the optical transition matrix elements for Bessel-mode twisted light and use them to calculate the wave function of photo-excited electrons to first-order in the vector potential of the laser. The associated net electric currents of first and second-order on the field are obtained. It is shown that the magnetic field produced at the center of the beam for the $\ell=1$ mode is of the order of a millitesla, and could therefore be detected experimentally using, for example, the technique of time-resolved Faraday rotation.
description: Submitted to Phys. Rev. Lett. (23 Jan 2008)
Every Byte Matters: Traffic Analysis of Bluetooth Wearable Devices
Creators: name: Barman, Ludovic
name: Dumur, Alexandre
name: Pyrgelis, Apostolos
name: Hubaux, Jean-Pierre
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Wearable devices such as smartwatches, fitness trackers, and blood-pressure monitors process, store, and communicate sensitive and personal information related to the health, life-style, habits and interests of the wearer. This data is exchanged with a companion app running on a smartphone over a Bluetooth connection. In this work, we investigate what can be inferred from the metadata (such as the packet timings and sizes) of encrypted Bluetooth communications between a wearable device and its connected smartphone. We show that a passive eavesdropper can use traffic-analysis attacks to accurately recognize (a) communicating devices, even without having access to the MAC address, (b) human actions (e.g., monitoring heart rate, exercising) performed on wearable devices ranging from fitness trackers to smartwatches, (c) the mere opening of specific applications on a Wear OS smartwatch (e.g., the opening of a medical app, which can immediately reveal a condition of the wearer), (d) fine-grained actions (e.g., recording an insulin injection) within a specific application that helps diabetic users to monitor their condition, and (e) the profile and habits of the wearer by continuously monitoring her traffic over an extended period. We run traffic-analysis attacks by collecting a dataset of Bluetooth traces of multiple wearable devices, by designing features based on packet sizes and timings, and by using machine learning to classify the encrypted traffic to actions performed by the wearer. Then, we explore standard defense strategies; we show that these defenses do not provide sufficient protection against our attacks and introduce significant costs. Our research highlights the need to rethink how applications exchange sensitive information over Bluetooth, to minimize unnecessary data exchanges, and to design new defenses against traffic-analysis tailored to the wearable setting.
description: 45 pages
High bandwidth temporal RF photonic signal processing with Kerr micro-combs: integration, fractional differentiation and Hilbert transforms
Creators: name: Tan, Mengxi
name: Xu, Xingyuan
name: Wu, Jiayang
name: Moss, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Integrated Kerr micro-combs, a powerful source of many wavelengths for photonic RF and microwave signal processing, are particularly useful for transversal filter systems. They have many advantages including a compact footprint, high versatility, large numbers of wavelengths, and wide bandwidths. We review recent progress on photonic RF and microwave high bandwidth temporal signal processing based on Kerr micro-combs with spacings from 49-200GHz. We cover integral and fractional Hilbert transforms, differentiators as well as integrators. The potential of optical micro-combs for RF photonic applications in functionality and ability to realize integrated solutions is also discussed.
description: 42 pages, 22 figures, 200 references
Testing Isotropy of Cosmic Microwave Background Radiation
Creators: name: Samal, Pramoda Kumar
name: Saha, Rajib
name: Jain, Pankaj
name: Ralston, John P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We introduce new symmetry-based methods to test for isotropy in cosmic microwave background radiation. Each angular multipole is factored into unique products of power eigenvectors, related multipoles and singular values that provide 2 new rotationally invariant measures mode by mode. The power entropy and directional entropy are new tests of randomness that are independent of the usual CMB power. Simulated galactic plane contamination is readily identified, and the new procedures mesh perfectly with linear transformations employed for windowed-sky analysis. The ILC -WMAP data maps show 7 axes well aligned with one another and the direction Virgo. Parameter free statistics find 12 independent cases of extraordinary axial alignment, low power entropy, or both having 5% probability or lower in an isotropic distribution. Isotropy of the ILC maps is ruled out to confidence levels of better than 99.9%, whether or not coincidences with other puzzles coming from the Virgo axis are included. Our work shows that anisotropy is not confined to the low l region, but extends over a much larger l range.
description: 40 pages 15 figures
Geometric construction of cluster algebras and cluster categories
Creators: name: Baur, Karin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: In this note we explain how to obtain cluster algebras from triangulations of (punctured) discs following the approach of S. Fomin, M. Shapiro and D. Thurston. Furthermore, we give a description of m-cluster categories via diagonals (arcs) in (punctured) polygons and of m-cluster categories via powers of translation quivers as given in joint work with R. Marsh.
description: 13 pages, 12 figures. This is an expanded version of a survey talk at the Courant-Colloquium Goettingen Trends in Mathematics, October 2008
Determination of the angular momentum distribution of supernovae from gravitational wave observations
Creators: name: Hayama, Kazuhiro
name: Desai, Shantanu
name: Kotake, Kei
name: Mohanty, Soumya D.
name: Rakhmanov, Malik
name: Summerscales, Tiffany
name: Yoshida, Sanichiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Significant progress has been made in the development of an international network of gravitational wave detectors, such as TAMA300, LIGO, VIRGO, and GEO600. For these detectors, one of the most promising sources of gravitational waves are core collapse supernovae especially in our Galaxy. Recent simulations of core collapse supernovae, rigorously carried out by various groups, show that the features of the waveforms are determined by the rotational profiles of the core, such as the rotation rate and the degree of the differential rotation prior to core-collapse. Specifically, it has been predicted that the sign of the second largest peak in the gravitational wave strain signal is negative if the core rotates cylindrically with strong differential rotation. The sign of the second peak could be a nice indicator that provides us with information about the angular momentum distribution of the core, unseen without gravitational wave signals. Here we present a data analysis procedure aiming at the detection of the second peak using a coherent network analysis and estimate the detection efficiency when a supernova is at the sky location of the Galactic center. The simulations showed we were able to determine the sign of the second peak under an idealized condition of a network of gravitational wave detectors if a supernova occurs at the Galactic center.
description: 9 pages, 11 figures, add references and some sentenses. To appear on CQG
Hydrogenation of small aromatic heterocycles at low temperatures
Creators: name: Miksch, April M.
name: Riffelt, Annalena
name: Oliveira, Ricardo
name: Kästner, Johannes
name: Molpeceres, Germán
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The recent wave of detections of interstellar aromatic molecules has sparked interest in the chemical behavior of aromatic molecules under astrophysical conditions. In most cases, these detections have been made through chemically related molecules, called proxies, that implicitly indicate the presence of a parent molecule. In this study, we present the results of the theoretical evaluation of the hydrogenation reactions of different aromatic molecules (benzene, pyridine, pyrrole, furan, thiophene, silabenzene, and phosphorine). The viability of these reactions allows us to evaluate the resilience of these molecules to the most important reducing agent in the interstellar medium, the hydrogen atom (H). All significant reactions are exothermic and most of them present activation barriers, which are, in several cases, overcome by quantum tunneling. Instanton reaction rate constants are provided between 50 K and 500 K. For the most efficiently formed radicals, a second hydrogenation step has been studied. We propose that hydrogenated derivatives of furan, pyrrole, and specially 2,3-dihydropyrrole, 2,5-dihydropyrrole, 2,3-dihydrofuran, and 2,5-dihydrofuran are promising candidates for future interstellar detections.
Thermal expansion of the magnetically ordering intermetallics RTMg (R = Eu, Gd and T = Ag, Au)
Creators: name: Rohrkamp, J.
name: Heyer, O.
name: Fickenscher, T.
name: Poettgen, R.
name: Jodlauk, S.
name: Hartmann, H.
name: Lorenz, T.
name: Mydosh, J. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report measurements of the thermal expansion for two Eu$^{+2}$- and two Gd$^{+3}$-based intermetallics which exhibit ferro- or antiferromagnetic phase transitions. These materials show sharp positive (EuAgMg and GdAuMg) and negative (EuAuMg and GdAgMg) peaks in the temperature dependence of the thermal expansion coefficient $α$ which become smeared and/or displaced in an external magnetic field. Together with specific heat data we determine the initial pressure dependences of the transition temperatures at ambient pressure using the Ehrenfest or Clausius-Clapeyron relation. We find large pressure dependences indicating strong spin-phonon coupling, in particular for GdAgMg and EuAuMg where a quantum phase transition might be reached at moderate pressures of a few GPa.
description: 6 pages, 3 figures
Heterotic AdS_3/CFT_2 duality with (0,4) spacetime supersymmetry
Creators: name: Hohenegger, Stefan
name: Keller, Christoph A.
name: Kirsch, Ingo
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the AdS_3/CFT_2 duality of a heterotic three-charge model with (0,4) target space supersymmetry. The worldsheet theory for heterotic strings on the AdS_3 x S^3/Z_N x T^4 near-horizon geometry was constructed by Kutasov, Larsen and Leigh in [hep-th/9812027]. We propose that the dual conformal field theory is given by a two-dimensional (0,4) sigma model arising on the Higgs branch of an orbifolded ADHM model. As a non-trivial consistency check of the correspondence, we find that the left- and right-moving central charges of the infrared conformal field theory agree with those predicted by the worldsheet model. Moreover, using the entropy function formalism, we show that to next-to-leading order the central charge can also be obtained from an alpha'-corrected supergravity theory.
description: 34 pages, 2 figures, references added, to be published in Nucl. Phys. B
Single-inclusive hadron production in transversely polarized p-p and pbar-p collisions with threshold resummation
Creators: name: de Florian, Daniel
name: Vogelsang, Werner
name: Wagner, Federico
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the resummation of large logarithmic perturbative corrections to the partonic cross sections for single-inclusive high-p_T hadron production in collisions of transversely polarized hadrons. We perform the resummation to next-to-leading logarithmic accuracy. Phenomenological results are given for pbar-p collisions at center-of-mass energy of 14.5 GeV and for p-p collisions at 62.4 GeV and at 10 GeV, which are relevant for possible experiments at the GSI-FAIR, RHIC and J-PARC facilities, respectively. We find significant enhancements of the spin-dependent and spin-averaged cross sections, but a decrease of the double-spin asymmetry A_TT.
description: 17 pages, 6 figures
Additional file 1 of Clinical effects with customized brackets and CAD/CAM technology: a prospective controlled study
Creators: name: Hegele, Julia
name: Seitz, Lena
name: Claussen, Cora
name: Baumert, Uwe
name: Sabbagh, Hisham
name: Wichelhaus, Andrea
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Cell Biology
Neuroscience
Pharmacology
Biotechnology
Cancer

description: Additional file 1. CONSORT 2010 flow diagram.
Bounded-from-below conditions for $A_4$-symmetric 3HDM
Creators: name: Buskin, N.
name: Ivanov, Igor P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Deriving necessary and sufficient conditions for a scalar potential to be bounded from below (BFB) is a difficult task beyond the simplest cases. Recently, a set of BFB conditions was proposed for the $A_4$-invariant three-Higgs-doublet model (3HDM). However, that set of conditions relied on numerical scan, and a complete analytic proof was lacking. Here, we fill this gap. We prove that the conjectured BFB conditions are indeed necessary and sufficient within the neutral Higgs subspace. We bypass technically challenging direct algebraic computations with a novel technique that relies on an auxiliary function, which is related to the Higgs potential but which is easier to analyze. This technique may finally be sufficient to tackle the more involved case of the original Weinberg's 3HDM model.
description: 17 pages, 3 figures
Additional file 2 of Clinical effects with customized brackets and CAD/CAM technology: a prospective controlled study
Creators: name: Hegele, Julia
name: Seitz, Lena
name: Claussen, Cora
name: Baumert, Uwe
name: Sabbagh, Hisham
name: Wichelhaus, Andrea
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Cell Biology
Neuroscience
Pharmacology
Biotechnology
Cancer

description: Additional file 2. CONSORT 2010 checklist.
Desvendando o tratamento da leucemia mieloide crônica
Creators: name: Casagrande, Vanessa
name: Spadella, Maria Angélica
name: Pinheiro, Osni Lázaro
Publisher: name: Zenodo
Year: 2018
Subjects: Materiais educativos e de divulgação, Assistência farmacêutica, Proteínas tirosina quinases, Leucemia mielogênica crônica BCR-ABL positiva.

description: Esta cartilha é destinada ao paciente que deseja saber sobre a Leucemia Mieloide Crônica (LMC) e seu tratamento. O objetivo é esclarecer sobre a doença, as opções de tratamento, os possíveis efeitos colaterais, indicações de como tomar o medicamento e as consequências quando não se toma. Além disso, busca motivá-lo quanto a seguir corretamente seu tratamento, compreendendo sua importância. Desta forma, espera-se que esta cartilha auxilie o paciente em sua rotina de tratamento, podendo ser útil para uma consulta rápida. e poderá ser utilizado como ferramenta para a realização de ações de “Educação em Saúde”.
Phytochemical Screening and in vivo Inhibitory Study of Telfaira occidentalis Hook f. Seeds Extract on Alpha Amylase and Alpha Glucosidase of Rats
Creators: name: Godwin Ndarake Enin, Jude Efiom Okokon, Blessing Okon Odokwo, Bassey Sunday Antia
Publisher: name: NIPES PUBLICATONS
Year: 2023

description: Diabetes mellitus (DM) is a serious metabolic disorder affecting about 425 million people worldwide with estimated 2.2 million deaths annually. The management of diabetes mellitus by the use of orthodox medicines has been unsatisfactory with huge financial burden to the patients in addition to the associated side effects. Therefore, the search for affordable, relatively safe and sustainable materials as alternative to synthetic drugs is inevitable. In this study, seeds of Telfaira occidentalis, a vegetable plant widely consumed in most part of Nigeria was evaluated for its in vivo inhibitory role on alpha amylase and alpha glucosidase enzymes in rats. The seed extracts (150, 300 and 450 mg/kg) were investigated using starch, sucrose, and maltose as substrates and acarbose as reference drug. The seed extract caused significant (p<0.05) reduction in blood glucose levels of the treated rats with the various substrates used. Preliminary phytochemical screening of the seed extract showed that alkaloids, flavonoids, saponins, cardiac glycosides, anthraquinones and tannins were present. The findings show that the seed extract of Telfaira occidentalis has inhibitory effects on alpha amylase and glucosidase in rats which, may be attributed to the presence of the phytochemical compounds.
An Application-Driven Conceptualization of Corner Cases for Perception in Highly Automated Driving
Creators: name: Heidecker, Florian
name: Breitenstein, Jasmin
name: Rösch, Kevin
name: Löhdefink, Jonas
name: Bieshaar, Maarten
name: Stiller, Christoph
name: Fingscheidt, Tim
name: Sick, Bernhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Systems and functions that rely on machine learning (ML) are the basis of highly automated driving. An essential task of such ML models is to reliably detect and interpret unusual, new, and potentially dangerous situations. The detection of those situations, which we refer to as corner cases, is highly relevant for successfully developing, applying, and validating automotive perception functions in future vehicles where multiple sensor modalities will be used. A complication for the development of corner case detectors is the lack of consistent definitions, terms, and corner case descriptions, especially when taking into account various automotive sensors. In this work, we provide an application-driven view of corner cases in highly automated driving. To achieve this goal, we first consider existing definitions from the general outlier, novelty, anomaly, and out-of-distribution detection to show relations and differences to corner cases. Moreover, we extend an existing camera-focused systematization of corner cases by adding RADAR (radio detection and ranging) and LiDAR (light detection and ranging) sensors. For this, we describe an exemplary toolchain for data acquisition and processing, highlighting the interfaces of the corner case detection. We also define a novel level of corner cases, the method layer corner cases, which appear due to uncertainty inherent in the methodology or the data distribution.
description: This paper is submitted to IEEE Intelligent Vehicles Symposium 2021
Manifestation of strongly correlated electrons in a 2D kagome metal-organic framework
Creators: name: Kumar, Dhaneesh
name: Hellerstedt, Jack
name: Field, Bernard
name: Lowe, Benjamin
name: Yin, Yuefeng
name: Medhekar, Nikhil V.
name: Schiffrin, Agustin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The kagome lattice, whose electronic valence band (VB) structure includes two Dirac bands and one flat band, offers a rich space to realise tuneable topological and strongly correlated electronic phases in two-dimensional (2D) and layered materials. While strong electron correlations have been observed in inorganic kagome crystals, they remain elusive in organic systems. The latter offer versatile synthesis protocols via molecular self-assembly and metal-ligand coordination. Here, we report the synthesis of a 2D metal-organic framework (MOF) where di-cyano-anthracene (DCA) molecules form a kagome arrangement via coordination with copper (Cu) atoms on a silver surface [Ag(111)]. Low-temperature scanning tunnelling spectroscopy revealed Kondo screening--by the Ag(111) conduction electrons--of magnetic moments localised at Cu and DCA sites of the MOF. Density functional theory and mean-field Hubbard modelling show that these local moments emerge from strong interactions between kagome MOF electrons, enabling organic 2D materials as viable platforms for strongly correlated nanoelectronics and spintronics.
description: Main text: 32 pages, 5 figures. Supplementary Information: 51 pages, 20 figures
Geometric Transition as a Change of Polarization
Creators: name: Montanez, Sergio
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Taking the results of hep-th/0702110 we study the Dijkgraaf-Vafa open/closed topological string duality by considering the wavefunction behavior of the partition function. We find that the geometric transition associated with the duality can be seen as a change of polarization.
description: 20 pages
An Investigation of Two-Dimensional Flow Separation with Reattachment
Creators: name: Djilali, Nedjib
Publisher: name: University of British Columbia
Year: 2010

description: This thesis presents an experimental study and numerical predictions of the separated-reattaching flow around a bluff rectangular section. This laboratory configuration, chosen for its geometric simplicity, exhibits all main features of two-dimensional flow separation with reattachment. Detailed turbulent flow measurements of the mean and fluctuating flow field are reported. The measurement techniques used are: hot-wire anemometry, pulsed-wire anemometry and pulsed-wire surface shear stress probes. The separated shear layer appears to behave like a conventional mixing layer over the first half of the separation bubble, but exhibits a lower growth rate and higher turbulent intensities in the second half. In the reattachment region, the flow is found to be highly turbulent and unsteady. A finite difference method is used, in conjunction with a modified version of the TEACH code, to predict the mean flow field. Two discretization schemes are used: the hybrid-upwind differencing (HD) scheme, and the bounded-skew-hybrid differencing (BSHD) scheme. Laminar flow computations are performed for Reynolds numbers in the range 100 to 325. The HD computations underpredict the separation-bubble length by up to 35% as a result of false diffusion. The BSHD predictions, on the other hand, are in excellent agreement with the experimental results reported in the literature. Turbulent flow computations using the ƙ - ∈ turbulence model and the BSHD scheme result in a reattachment length about 30% shorter than the present measured value. When a curvature correction is incorporated into the model, a reattachment length of 4.3.D, compared to the experimental value of 4.7D, is predicted. The predicted mean flow, turbulent kinetic energy field and pressure distribution are in good agreement with experimental observations. An alternative method of analysis, based on the momentum integral technique, is presented. The method is not applied to the blunt-rectangular plate problem, but its use is illustrated for the simpler case of the flow in a sudden expansion, and promising results are obtained.
Episodic memory governs choices: An RNN-based reinforcement learning model for decision-making task
Creators: name: Zhang, Xiaohan
name: Liu, Lu
name: Long, Guodong
name: Jiang, Jing
name: Liu, Shenquan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Typical methods to study cognitive function are to record the electrical activities of animal neurons during the training of animals performing behavioral tasks. A key problem is that they fail to record all the relevant neurons in the animal brain. To alleviate this problem, we develop an RNN-based Actor-Critic framework, which is trained through reinforcement learning (RL) to solve two tasks analogous to the monkeys' decision-making tasks. The trained model is capable of reproducing some features of neural activities recorded from animal brain, or some behavior properties exhibited in animal experiments, suggesting that it can serve as a computational platform to explore other cognitive functions. Furthermore, we conduct behavioral experiments on our framework, trying to explore an open question in neuroscience: which episodic memory in the hippocampus should be selected to ultimately govern future decisions. We find that the retrieval of salient events sampled from episodic memories can effectively shorten deliberation time than common events in the decision-making process. The results indicate that salient events stored in the hippocampus could be prioritized to propagate reward information, and thus allow decision-makers to learn a strategy faster.
description: Accepted to Neural Networks, Volume 134, February 2021, Pages 1-10
Additional file 2 of Assessing the impact of knowledge communication and dissemination strategies targeted at health policy-makers and managers: an overview of systematic reviews
Creators: name: Chapman, Evelina
name: Pantoja, Tomas
name: Kuchenmüller, Tanja
name: Sharma, Tarang
name: Terry, Robert F.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2. Excluded studies with reasons.
The acquisition of the English auxiliary system and its relation to linguistic theory
Creators: name: Davis, Henry
Publisher: name: University of British Columbia
Year: 2010

description: This thesis explores the connection between linguistic theory, as embodied in a version of the Government - Binding (GB) model of syntax, and the parameter-setting theory of language acquisition. In Chapter 2, it is argued that by incorporating the criterion of epistemological priority, syntactic theory can move closer towards becoming a plausible model of language acquisition. A version of GB theory is developed which adopts this criterion, leading to several modifications, including the derivation of X-bar theory from more "primitive" grammatical sub-components, and a revision of the Projection Principle. This model is converted into a procedure for phrase-structure acquisition, employing sets of Canonical Government Configurations and Percolation Principles to map Case- and θ-relations onto phrase-structure trees. The chapter ends with a discussion of the "missing-subject" stage in the acquisition of English. Chapter 3 concerns auxiliaries. It is argued that parametric variation in auxiliary systems can be reduced to levels of association between INFL and V. The question of irregularity is dealt with through the Designation Convention of Emonds (1985), which makes a distinction between open- and closed- class grammatical elements, and a Parallel Distributed Processing model of learning. The last part of the chapter investigates the learning of the English auxiliary system, and in particular the errors known as "auxiliary overmarking". Chapter 4 investigates the syntax of Subject Auxiliary Inversion (SAI)-type rules. An account of inversion is developed based on the theory of predication, in which inversion-inducing elements are treated as "A'-type" subjects which must be linked to AGR in order to satisfy conditions on Predicate-licensing. A parametrization is developed based on the cross-linguistic examination of SAI-type rules. Chapter 5 concerns the acquisition of SAI. It is argued that there are no invariant "stages" in the development of inversion; rather, a proportion of children misanalyze (WH + contracted auxiliary) sequences as (WH + AGR-clitic) sequences and formulate grammars in which SAI is unnecessary. A "two-tiered" theory of syntactic acquisition is proposed to account for the observed developmental patterns.
Baryon-charge Chemical Potential in AdS/CFT
Creators: name: Nakamura, Shin
name: Seo, Yunseok
name: Sin, Sang-Jin
name: Yogendran, K. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a closed framework of AdS/CFT with finite U(1)B-charge chemical potential. We show how the gauge-invariant identification of the chemical potential with the bulk gauge field emerges from the standard AdS/CFT dictionary. Physical importance and necessity of the Minkowski embeddings within the present framework is also shown numerically in the D3-D7 systems. We point out that the D3-D7 model with only the black-hole embeddings does not have the low-temperature and low-chemical-potential region in the grand-canonical ensemble, hence it is incomplete. A physical interpretation that explains these numerical results is also proposed.
description: Revtex4, 36 pages with 23 figures
Additional file 1 of Assessing the impact of knowledge communication and dissemination strategies targeted at health policy-makers and managers: an overview of systematic reviews
Creators: name: Chapman, Evelina
name: Pantoja, Tomas
name: Kuchenmüller, Tanja
name: Sharma, Tarang
name: Terry, Robert F.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1. Search terms and results.
Brans-Dicke geometry
Creators: name: Punzi, Raffaele
name: Schuller, Frederic P.
name: Wohlfarth, Mattias N. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We reveal the non-metric geometry underlying omega-->0 Brans-Dicke theory by unifying the metric and scalar field into a single geometric structure. Taking this structure seriously as the geometry to which matter universally couples, we show that the theory is fully consistent with solar system tests. This is in striking constrast with the standard metric coupling, which grossly violates post-Newtonian experimental constraints.
description: 8 pages, v2 with additional comment and references
Smart mobile microscopy: towards fully-automated digitization
Creators: name: Kornilova, A.
name: Kirilenko, I.
name: Iarosh, D.
name: Kutuev, V.
name: Strutovsky, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Mobile microscopy is a newly formed field that emerged from a combination of optical microscopy capabilities and spread, functionality, and ever-increasing computing resources of mobile devices. Despite the idea of creating a system that would successfully merge a microscope, numerous computer vision methods, and a mobile device is regularly examined, the resulting implementations still require the presence of a qualified operator to control specimen digitization. In this paper, we address the task of surpassing this constraint and present a ``smart'' mobile microscope concept aimed at automatic digitization of the most valuable visual information about the specimen. We perform this through combining automated microscope setup control and classic techniques such as auto-focusing, in-focus filtering, and focus-stacking -- adapted and optimized as parts of a mobile cross-platform library.
Conformal Transformation Electromagnetics Based on Schwarz-Christoffel Mapping for the Synthesis of Doubly Connected Metalenses
Creators: name: Salucci, M.
name: Boulos, F.
name: Polo, A.
name: Oliveri, G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applied Physics (physics.app-ph)
subject: Systems and Control (eess.SY)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: An innovative transformation electromagnetics (TE) paradigm, which leverages on the Schwarz-Christoffel (SC) theorem, is proposed to design effective and realistic field manipulation devices (FMDs). Thanks to the conformal property, such a TE design method allows one to considerably mitigate the anisotropy of the synthesized metalenses (i.e., devices with artificially engineered materials covering an antenna to modify its radiation features) with respect to those yielded by the competitive state-of-the-art TE techniques. Moreover, devices with doubly connected contours, thus including masts with arbitrary sections and lenses with holes/forbidden regions in which the material properties cannot be controlled, can be handled. A set of numerical experiments is presented to assess the features of the proposed method in terms of field-manipulation capabilities and complexity of the lens material in a comparative fashion.
Role of slip between a probe particle and a gel in microrheology
Creators: name: Fu, Henry C.
name: Shenoy, Vivek B.
name: Powers, Thomas R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In the technique of microrheology, macroscopic rheological parameters as well as information about local structure are deduced from the behavior of microscopic probe particles under thermal or active forcing. Microrheology requires knowledge of the relation between macroscopic parameters and the force felt by a particle in response to displacements. We investigate this response function for a spherical particle using the two-fluid model, in which the gel is represented by a polymer network coupled to a surrounding solvent via a drag force. We obtain an analytic solution for the response function in the limit of small volume fraction of the polymer network, and neglecting inertial effects. We use no-slip boundary conditions for the solvent at the surface of the sphere. The boundary condition for the network at the surface of the sphere is a kinetic friction law, for which the tangential stress of the network is proportional to relative velocity of the network and the sphere. This boundary condition encompasses both no-slip and frictionless boundary conditions as limits. Far from the sphere there is no relative motion between the solvent and network due to the coupling between them. However, the different boundary conditions on the solvent and network tend to produce different far-field motions. We show that the far field motion and the force on the sphere are controlled by the solvent boundary conditions at high frequency and by the network boundary conditions at low frequency. At low frequencies compression of the network can also affect the force on the sphere. We find the crossover frequencies at which the effects of sliding of the sphere past the polymer network and compression of the gel become important.
description: Corrected expressions for crossover frequencies on page 2