452 research outputs found
A efetividade do direito fundamental ao acesso à informação e seu papel na proteção da população em tempos de pandemia: um estudo a partir do cenário brasileiro no enfrentamento da Covid-19
O presente trabalho propõe-se à investigação do direito fundamental ao acesso à informação e de sua eficácia jurídica e social no contexto mundial da pandemia de Covid-19. Toma-se por referência o contexto brasileiro, em que estaria consagrado como direito voltado majoritariamente ao controle e otimização da máquina pública e suas ações. Diante das ameaças do novo coronavírus, explora-se o direito fundamental ao acesso à informação a partir da perspectiva de promoção à autodeterminação individual. Para tanto, empreende-se a revisão da teoria dos direitos fundamentais, mas também investigação empírica da conjuntura hodierna a partir de dados e estudos disponibilizados em meio digital. Assim, vê-se que a otimização eficacial do direito à informação faz-se imprescindível à proteção de outros direitos fundamentais, como saúde, segurança, liberdade e vida, sobretudo diante das incertezas da pandemia. Através da pesquisa doutrinária e documental, valendo-se da análise comparativa de tratamentos normativos e do método dedutivo-indutivo, foram destacadas reflexões quanto às diversas problemáticas jurídicas que o corte epistemológico provoca, especialmente, quanto aos caminhos de efetivação da dignidade humana e de resguardo à autodeterminação individual e coletiva instrumentalizados pelo acesso à informação e seus elementos essenciais: comunicação e o conhecimento.
A Project Module of E-Commerce Planning
The development of a pedagogy that integrates scholastic knowledge and practical skills of e-commerce for business students is imperative. Students typically learn e-commerce planning through course projects. This note provides tips for designing and teaching an e-commerce planning project module for the e-commerce course
Quantum energy flow in mesoscopic dielectric structures
We investigate the phononic energy transport properties of mesoscopic,
suspended dielectric wires. The Landauer formula for the thermal conductance is
derived and its universal aspects discussed. We then determine the variance of
the energy current in the presence of a steady state current flow. In the final
part, some initial results are presented concerning the nature of the
temperature fluctuations of a mesoscopic electron gas thermometer due to the
absorption and emission of wire phonons.Comment: 20 pages, 2 figures. Submitted to Phys. Rev.
The quiescent light curve and evolutionary state of GRO J1655-40
We present ellipsoidal light-curve fits to the quiescent B, V, R and I light
curves of GRO J1655-40 (Nova Scorpii 1994). The fits are based on a simple
model consisting of a Roche-lobe filling secondary and an accretion disc around
the black-hole primary. Unlike previous studies, no assumptions are made about
the interstellar extinction or the distance to the source; instead these are
determined self-consistently from the observed light curves. In order to obtain
tighter limits on the model parameters, we used the distance determination from
the kinematics of the radio jet as an additional constraint. We obtain a value
for the extinction that is lower than was assumed previously; this leads to
lower masses for both the black hole and the secondary star of 5.4 +/- 0.3 Msun
and 1.45 +/- 0.35 Msun, respectively. The errors in the determination of the
model parameters are dominated by systematic errors, in particular due to
uncertainties in the modeling of the disk structure and uncertainties in the
atmosphere model for the chemically anomalous secondary in the system. A lower
mass of the secondary naturally explains the transient nature of the system if
it is either in a late case A or early case B mass-transfer phase.Comment: 12 pages, 4 figures, submitted to MNRA
Generalized thermodynamics of q-deformed bosons and fermions
We study the thermostatistics of q-deformed bosons and fermions obeying the
symmetric algebra and show that it can be built on the formalism of q-calculus.
The entire structure of thermodynamics is preserved if ordinary derivatives are
replaced by an appropriate Jackson derivative. In this framework, we derive the
most important thermodynamic functions describing the q-boson and q-fermion
ideal gases in the thermodynamic limit. We also investigate the semi-classical
limit and the low temperature regime and demonstrate that the nature of the
q-deformation gives rise to pure quantum statistical effects stronger than
undeformed boson and fermion particles.Comment: 8 pages, Physical Review E in pres
CNN-FM: Personalized Content-Aware Image Tag Recommendation
Social media services allow users to share and annotate their resources freely with keywords or tags that have valuable information to support organizing or searching uploaded images or videos. Tag recommendation is used to encourage users to annotate their resources. Recommending tags of images to users not only depends on user preference but also strongly relies on the contents of images. In this paper, we propose a method for image tag recommendation using both image visual features and user past tagging behaviours by combining convolutional neural networks (CNN), which are widely used and have achieved high performance in image classification and recognition, and factorization machines (FM), since factorization models are the state-of-the-art approach for tag recommendation. Empirically, we demonstrate that learnable features extracted by CNNs can improve up to 7 percent the performance of FMs in image tag recommendation
Multi Parametric Deformed Heisenberg Algebras: A Route to Complexity
We introduce a generalization of the Heisenberg algebra which is written in
terms of a functional of one generator of the algebra, , that can be
any analytical function. When is linear with slope , we show that
the algebra in this case corresponds to -oscillators for . The case where is a polynomial of order in corresponds
to a -parameter deformed Heisenberg algebra. The representations of the
algebra, when is any analytical function, are shown to be obtained through
the study of the stability of the fixed points of and their composed
functions. The case when is a quadratic polynomial in , the simplest
non-linear scheme which is able to create chaotic behavior, is analyzed in
detail and special regions in the parameter space give representations that
cannot be continuously deformed to representations of Heisenberg algebra.Comment: latex, 17 pages, 5 PS figures; to be published in J. Phys. A: Math
and Gen (2001); a few sentences were added in order to clarify some point
Nanomechanical mechanisms of Lyme disease spirochete motility enhancement in extracellular matrix
As opposed to pathogens passively circulating in the body fluids of their host, pathogenic species within the Spirochetes phylum are able to actively coordinate their movement in the host to cause systemic infections. Based on the unique morphology and high motility of spirochetes, we hypothesized that their surface adhesive molecules might be suitably adapted to aid in their dissemination strategies. Designing a system that mimics natural environmental signals, which many spirochetes face during their infectious cycle, we observed that a subset of their surface proteins, particularly Decorin binding protein (Dbp) A/B, can strongly enhance the motility of spirochetes in the extracellular matrix of the host. Using single-molecule force spectroscopy, we disentangled the mechanistic details of DbpA/B and decorin/laminin interactions. Our results show that spirochetes are able to leverage a wide variety of adhesion strategies through force-tuning transient molecular binding to extracellular matrix components, which concertedly enhance spirochetal dissemination through the host. Martin Strnad, Yoo Jin Oh, and colleagues use single-molecule force spectroscopy and an extracellular matrix (ECM) analog that mimics natural tick feeding to show that the surface proteins DbpA/B can enhance spirochete motility in the ECM of the host. These results show that spirochetes can tune their transient molecular binding to ECM components to enhance spirochetal dissemination through the host
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