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- Repositório Científico Lusófona
- Universidade Cornell
- University of Cambridge; Department of Engineering
- Instituto de Tecnologia da Califórnia
- Rochester Instituto de Tecnologia
- Revista Observatório
- Departamento de Ciência da Informação – UFSC
- Archivos de la Sociedad Española de Oftalmología
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Avaliação da qualidade de vida e do grau de dependência dos idosos apoiados pelo serviço de apoio domiciliário da Penha de França da Santa Casa da Misericórdia de Lisboa
Fonte: Repositório Científico Lusófona
Publicador: Repositório Científico Lusófona
Tipo: Dissertação de Mestrado
Português
Relevância na Pesquisa
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#CUIDADOS CONTINUADOS#QUALIDADE DE VIDA#IDOSOS#APOIO SOCIAL#APOIO DOMICILIÁRIO#MMSE#TESTES PSICOLÓGICOS#ÍNDICE DE LAWTON#WHOQOL (OLD...)#CONTINUING CARE MASTER#ELDERLY
Objetivos: Este estudo que surge na conclusão do Iº Mestrado em Cuidados Continuados
Integrados, da Escola de Ciências e Tecnologias da Saúde da Universidade Lusófona de
Humanidades e Tecnologias de Lisboa, está diretamente relacionado com a prática dos
Cuidados Continuados e tem como objetivo melhorar o conhecimento sobre a população
idosa apoiada pelo Serviço de Apoio Domiciliário (SAD) da Penha de França (PDF) da
Santa Casa da Misericórdia de Lisboa (SCML), através da Avaliação da sua Qualidade de
Vida e dos seus Graus de Dependência, verificando ainda a existência de correlações entre
os resultados dos instrumentos.
Métodos: Realizou-se um estudo exploratório descritivo-correlacional, quantitativo e
qualitativo, em que a seleção da amostra teve como critério de exclusão o défice cognitivo
em que participantes não teriam diagnosticada doença Psiquiátrica, e como fatores de
inclusão ter mais de 65 anos e beneficiar do serviços de SAD da PDF da SCML. Aos 40
idosos que assinaram o consentimento informado, representando cerca de 20% da
população total, foi aplicado o Formulário de recolha de dados demográficos, os Índices de
avaliação: das Atividades Básicas da Vida Diária (ABVD), de Barthel (IB); da avaliação
das Atividades Instrumentais da Vida Diária (AIVD)...
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Ionization compression impact on dense gas distribution and star formation, Probability density functions around H ii regions as seen by Herschel
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 28/01/2014
Português
Relevância na Pesquisa
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Ionization feedback should impact the probability distribution function (PDF)
of the column density around the ionized gas. We aim to quantify this effect
and discuss its potential link to the Core and Initial Mass Function (CMF/IMF).
We used in a systematic way Herschel column density maps of several regions
observed within the HOBYS key program: M16, the Rosette and Vela C molecular
cloud, and the RCW 120 H ii region. We fitted the column density PDFs of all
clouds with two lognormal distributions, since they present a double-peak or
enlarged shape in the PDF. Our interpretation is that the lowest part of the
column density distribution describes the turbulent molecular gas while the
second peak corresponds to a compression zone induced by the expansion of the
ionized gas into the turbulent molecular cloud. The condensations at the edge
of the ionized gas have a steep compressed radial profile, sometimes
recognizable in the flattening of the power-law tail. This could lead to an
unambiguous criterion able to disentangle triggered from pre-existing star
formation. In the context of the gravo-turbulent scenario for the origin of the
CMF/IMF, the double peaked/enlarged shape of the PDF may impact the formation
of objects at both the low-mass and the high-mass end of the CMF/IMF. In
particular a broader PDF is required by the gravo-turbulent scenario to fit
properly the IMF with a reasonable initial Mach number for the molecular cloud.
Since other physical processes (e.g. the equation of state and the variations
among the core properties) have already been suggested to broaden the PDF...
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Viscous Instanton for Burgers' Turbulence
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 31/03/1996
Português
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We consider the tails of probability density functions (PDF) for different
characteristics of velocity that satisfies Burgers equation driven by a
large-scale force. The saddle-point approximation is employed in the path
integral so that the calculation of the PDF tails boils down to finding the
special field-force configuration (instanton) that realizes the extremum of
probability. We calculate high moments of the velocity gradient $\partial_xu$
and find out that they correspond to the PDF with $\ln[{\cal
P}(\partial_xu)]\propto-(-\partial_xu/{\rm Re})^{3/2}$ where ${\rm Re}$ is the
Reynolds number. That stretched exponential form is valid for negative
$\partial_xu$ with the modulus much larger than its root-mean-square (rms)
value. The respective tail of PDF for negative velocity differences $w$ is
steeper than Gaussian, $\ln{\cal P}(w)\sim-(w/u_{\rm rms})^3$, as well as
single-point velocity PDF $\ln{\cal P}(u)\sim-(|u|/u_{\rm rms})^3$. For high
velocity derivatives $u^{(k)}=\partial_x^ku$, the general formula is found:
$\ln{\cal P}(|u^{(k)}|)\propto -(|u^{(k)}|/{\rm Re}^k)^{3/(k+1)}$.; Comment: 15 pages, RevTeX 3.0
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Intermittent scaling of the probability density function tail of the Kardar-Parisi-Zhang equation
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
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This letter provides the first analytical estimation of the probability
density function (PDF) tail of the interface width in the Kardar-Parisi-Zhang
equation in the regime of strongly non-linear growth. We find that the PDF tail
is proportional to $\exp{- c w_2^{3/2}}$. In addition, the effect of spatial
dimensions on the PDF tail scaling is dicussed. The PDF tail is computed by the
instanton method within the Martin-Rose-Siggia framework using a careful
treatment of the non-linear term. This gives a novel approach to understand the
rightmost PDF tail of the interface width distribution and the analysis
suggests that there is no limit in the upper critical dimension.; Comment: 6 pages, 2 figures, submitted to EPL
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Observational Diagnostics of Self-Gravitating MHD Turbulence in Giant Molecular Clouds
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 14/05/2015
Português
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We study the observable signatures of self-gravitating MHD turbulence by
applying the probability density functions (PDFs) and the spatial density power
spectrum to synthetic column density maps. We find that there exists three
characterizable stages of the evolution of the collapsing cloud which we term
"early," "intermediate," and "advanced." At early times, i.e. $t<0.15t_{ff}$,
the column density has a power spectral slope similar to nongravitating
supersonic turbulence and a lognormal distribution. At an intermediate stage,
i.e. $0.15t_{ff}< t \leq 0.35t_{ff}$, there exists signatures of the prestellar
cores in the shallower PDF and power spectrum power law slopes. The column
density PDF power law tails at these times have line of sight averaged slopes
ranging from -2.5 to -1.5 with shallower values belonging to simulations with
lower magnetic field strength. The density power spectrum slope becomes shallow
and can be characterized by $P(k)=A_1k^{\beta_2}e^{-k/k_c}$, where $A_1$
describes the amplitude, $k^{\beta_2}$ describes the classical power law
behavior and the scale $k_c$ characterizes the turn over from turbulence
dominated to self-gravity dominated. At advanced stages of collapse, i.e.
$\approx t>0.35t_{ff}$, the power spectral slope is positive valued...
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Incorporating Photometric Redshift Probability Density Information into Real-Space Clustering Measurements
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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The use of photometric redshifts in cosmology is increasing. Often, however
these photo-zs are treated like spectroscopic observations, in that the peak of
the photometric redshift, rather than the full probability density function
(PDF), is used. This overlooks useful information inherent in the full PDF. We
introduce a new real-space estimator for one of the most used cosmological
statistics, the 2-point correlation function, that weights by the PDF of
individual photometric objects in a manner that is optimal when Poisson
statistics dominate. As our estimator does not bin based on the PDF peak it
substantially enhances the clustering signal by usefully incorporating
information from all photometric objects that overlap the redshift bin of
interest. As a real-world application, we measure QSO clustering in the Sloan
Digital Sky Survey (SDSS). We find that our simplest binned estimator improves
the clustering signal by a factor equivalent to increasing the survey size by a
factor of 2-3. We also introduce a new implementation that fully weights
between pairs of objects in constructing the cross-correlation and find that
this pair-weighted estimator improves clustering signal in a manner equivalent
to increasing the survey size by a factor of 4-5. Our technique uses
spectroscopic data to anchor the distance scale and it will be particularly
useful where spectroscopic data (e.g...
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Evolution of Cosmological Density Distribution Function from the Local Collapse Model
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 29/01/2003
Português
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We present a general framework to treat the evolution of one-point
probability distribution function (PDF) for cosmic density $\delta$ and
velocity-divergence fields $\theta$. In particular, we derive an evolution
equation for the one-point PDFs and consider the stochastic nature associated
with these quantities. Under the local approximation that the evolution of
cosmic fluid fields can be characterized by the Lagrangian local dynamics with
finite degrees of freedom, evolution equation for PDFs becomes a closed form
and consistent formal solutions are constructed. Adopting this local
approximation, we explicitly evaluate the one-point PDFs $P(\delta)$ and
$P(\theta)$ from the spherical and the ellipsoidal collapse models as the
representative Lagrangian local dynamics. In a Gaussian initial condition,
while the local density PDF from the ellipsoidal model almost coincides with
the that of the spherical model, differences between spherical and ellipsoidal
collapse model are found in the velocity-divergence PDF. Importantly, the joint
PDF of local density, $P(\delta,t;\delta',t')$, evaluated at the same
Lagrangian position but at the different times $t$ and $t'$ from the
ellipsoidal collapse model exhibits a large amount of scatter. The mean
relation between $\delta$ and $\delta'$ does fail to match the one-to-one
mapping obtained from spherical collapse model. Moreover...
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An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 13/11/2007
Português
Relevância na Pesquisa
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We have performed an extensive Voigt profile analysis of the neutral hydrogen
(HI) and metal absorption present in a sample of 18 high resolution, high
signal-to-noise QSO spectra observed with VLT/UVES. We use this analysis to
separate the metal contribution from the HI absorption and present an improved
measurement of the flux probability distribution function (PDF) due to HI
absorption alone at = 2.07, 2.52, and 2.94. The flux PDF is sensitive to
the continuum fit in the normalised flux range 0.8 < F < 1.0 and to metal
absorption at 0.2 < F < 0.8. Our new measurements of the flux PDF due to HI
absorption alone are systematically lower at 0.2 < F < 0.8 by up to 30%
compared to the widely used measurement of McDonald et al. (2000), based on a
significantly smaller sample of Keck/HIRES data. This discrepancy is probably
due to a combination of our improved removal of the metal absorption and cosmic
variance, since variations in the flux PDF between different lines-of-sight are
large. The HI effective optical depth at 1.7 < z < 4 is best fit with a single
power law, (0.0023 +-0.0007) (1+z)^(3.65 +- 0.21), in good agreement with
previous measurements from comparable data. As also found previously, the
effect of noise on the flux distribution is not significant in high resolution...
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The Probability Distribution Function of Light in the Universe: Results from Hydrodynamic Simulations
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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While second and higher order correlations of the light distribution have
received extensive study, the lowest order probability distribution function
(PDF) -- the probability that a unit volume of space will emit a given amount
of light -- has received very little attention. We estimate this function with
the aid of hydrodynamic simulations of the Lambda CDM model, finding it
significantly different from the mass density PDF, and not simply related to it
by linear bias or any of the other prescriptions commonly adopted. If the
optical light PDF is, in reality, similar to what we find in the simulations,
then some measures of Omega_M based on mass-to-light ratio and the cosmic
virial theorem will have significantly underestimated Omega_M. Basically, the
problem is one of selection bias, with galaxy forming regions being
unrepresentative of the dark matter distribution in a way not described by
linear bias. Knowledge of the optical PDF and the plausible assumption of a
log-normal distribution for the matter PDF will allow one to correct for these
selection biases. We find that this correction (which amounts to 20-30%) brings
the values of Omega_M estimated by using the mass-to-light ratio and the cosmic
virial theorem to the range 0.2-0.3...
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Investigation of the errors in SDSS proper-motion measurements using samples of quasars
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 26/07/2011
Português
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We investigate in detail the probability distribution function (pdf) of the
proper-motion measurement errors in the SDSS+USNO-B proper-motion catalog of
\citet{mun04} using clean quasar samples. The pdf of the errors is
well-represented by a Gaussian core with extended wings, plus a very small
fraction ($<0.1%$) of "outliers". We find while formally the pdf could be
well-fit by a five-parameter fitting function, for many purposes it is also
adequately to represent the pdf with a one-parameter approximation to this
function. We apply this pdf to the calculation of the confidence intervals on
the true proper motion for a SDSS+USNO-B proper motion measurement, and discuss
several scientific applications of the SDSS proper motion catalogue. Our
results have various applications in studies of the galactic structure and
stellar kinematics. Specifically, they are crucial for searching hyper-velocity
stars in the Galaxy.; Comment: 26 pages (single column), 11 figures, accepted in AJ
Link permanente para citações:
Density Probability Distribution Functions in Supersonic Hydrodynamic and MHD Turbulence
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Português
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We study the probability distribution function (PDF) of the mass density in
simulations of supersonic turbulence with properties appropriate for molecular
clouds. For this study we use Athena, a new higher-order Godunov code. We find
there are surprisingly similar relationships between the mean of the
time-averaged PDF and the turbulent Mach number for driven hydrodynamic and
strong-field MHD turbulence. There is, however, a large scatter about these
relations, indicating a high level of temporal and spatial variability in the
PDF. Thus, the PDF of the mass density is unlikely to be a good measure of
magnetic field strength. We also find the PDF of decaying MHD turbulence
deviates from the mean-Mach relation found in the driven case. This implies
that the instantaneous Mach number alone is not enough to determine the
statistical properties of turbulence that is out of equilibrium. The scatter
about the mean-Mach relation for driven turbulence, along with the large
departure of decaying turbulence PDFs from those of driven turbulence, may
illuminate one factor contributing to the large observed cloud-to-cloud
variation in the star formation rate per solar mass.; Comment: 4 pages, 2 figures, published in ApJL; corrected sign in eqn. (4)
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The Gram-Charlier A Series based Extended Rule-of-Thumb for Bandwidth Selection in Univariate and Multivariate Kernel Density Estimations
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 03/04/2015
Português
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#Computer Science - Learning#Statistics - Computation#Statistics - Methodology#Statistics - Machine Learning#11Kxx#I.5.0
The article derives a novel Gram-Charlier A (GCA) Series based Extended
Rule-of-Thumb (ExROT) for bandwidth selection in Kernel Density Estimation
(KDE). There are existing various bandwidth selection rules achieving
minimization of the Asymptotic Mean Integrated Square Error (AMISE) between the
estimated probability density function (PDF) and the actual PDF. The rules
differ in a way to estimate the integration of the squared second order
derivative of an unknown PDF $(f(\cdot))$, identified as the roughness
$R(f''(\cdot))$. The simplest Rule-of-Thumb (ROT) estimates $R(f''(\cdot))$
with an assumption that the density being estimated is Gaussian. Intuitively,
better estimation of $R(f''(\cdot))$ and consequently better bandwidth
selection rules can be derived, if the unknown PDF is approximated through an
infinite series expansion based on a more generalized density assumption. As a
demonstration and verification to this concept, the ExROT derived in the
article uses an extended assumption that the density being estimated is near
Gaussian. This helps use of the GCA expansion as an approximation to the
unknown near Gaussian PDF. The ExROT for univariate KDE is extended to that for
multivariate KDE. The required multivariate AMISE criteria is re-derived using
elementary calculus of several variables...
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The momentum flux probability distribution function for ion-temperature-gradient turbulence
Fonte: Universidade Cornell
Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 15/01/2009
Português
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There has been overwhelming evidence that coherent structures play a critical
role in determining the overall transport in a variety of systems. We compute
the probability distribution function (PDF) tails of momentum flux and heat
flux in ion-temperature-gradient turbulence, by taking into account the
interaction among modons, which are assumed to be coherent structures
responsible for bursty and intermittent events, contributing to the PDF tails.
The tail of PDF of momentum flux $R = < v_x v_y>$ is shown to be exponential
with the form $\exp{\{-\xi R^{3/2}\}}$, which is broader than a Gaussian,
similarly to what was found in the previous local studies. An analogous
expression with the same functional dependence is found for the PDF tails of
heat flux. Furthermore, we present a detailed numerical study of the dependence
of the PDF tail on the temperature and density scale lengths and other physical
parameters through the coefficient $\xi$.; Comment: 23 pages, 2 figures
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Turbulent partially premixed combustion: DNS analysis and RANS simulation
Fonte: University of Cambridge; Department of Engineering
Publicador: University of Cambridge; Department of Engineering
Tipo: Thesis; doctoral; PhD
Português
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Increasingly stringent regulation of pollutant emission has motivated the search
for cleaner and more efficient combustion devices, which remain the primary
means of power generation and propulsion for all kinds of transport. Fuel-lean
premixed combustion technology has been identified to be a promising approach,
despite many difficulties involve, notably issues concerning flame stability and ignitability.
A partially premixed system has been introduced to remedy these problems,
however, our understanding on this combustion mode needs to be greatly
improved to realise its full potential.
This thesis aims to further the understanding of various fundamental physical
processes in turbulent partially premixed flames. DNS data of a laboratory-scale
hydrogen turbulent jet lifted flame is analysed in this study. The partially
premixed nature of this flame is established by examining the instantaneous and
averaged reaction rates and the "Flame Index", which indicate premixed and
diffusion burning modes coexisting.
The behaviour of turbulent flame stretch and its relation to other physical
processes, in particular the scalar-turbulence interaction, the effects of partial
premixing on the displacement speed of iso-scalar surface and its correlation with
the surface curvature are explored using DNS data. The scalar gradient alignment
characteristics change from aligning with the most compressive strain to
aligning with the most extensive one in regions of intensive heat release. This
alignment change creates negative normal strain rate which can result in negative
surface averaged tangential strain rate. The partial premixing affects the flame
surface displacement speed through the mixture fraction dissipation rate and a
second derivative in the mixture fraction space. The correlation of curvature and
displacement speed is found to be negative in general and the effects of partial
premixing act to reduce this negative correlation. The combined effects of the
normal strain rate and the displacement speed/curvature correlation contribute
to the negative mean flame stretch observed in the flame brush.
Scalar dissipation rates (SDR) of the mixture fraction ?ZZ...
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A multirate DSP model for estimation of discrete probability density functions
Fonte: Instituto de Tecnologia da Califórnia
Publicador: Instituto de Tecnologia da Califórnia
Tipo: Article; PeerReviewed
Formato: application/pdf
Publicado em /01/2005
Português
Relevância na Pesquisa
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The problem of estimating a probability density function (PDF) from measurements has been widely studied by many researchers. Even though much work has been done in the area of PDF estimation, most of it was focused on the continuous case. We propose a new model-based approach for modeling and estimating discrete probability density functions or probability mass functions. This approach is based on multirate signal processing theory, and it has several advantages over the conventional histogram method. We illustrate the PDF estimation procedure and analyze the statistical properties of the PDF estimates. Based on this model, a novel scheme is introduced that can be used for estimating the PDF in the presence of noise. Furthermore, the proposed ideas are extended to the more general case of estimating multivariate PDFs. Finally, we also consider practical issues such as optimizing the coefficients of a digital filter, which is an integral part of the model. This allows us to apply the proposed model to solve real-world problems. Simulation results are given where appropriate in order to demonstrate the ideas.
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An Investigation into the distuibution of portable documents in a prepress environment
Fonte: Rochester Instituto de Tecnologia
Publicador: Rochester Instituto de Tecnologia
Tipo: Tese de Doutorado
Português
Relevância na Pesquisa
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#Imaging science#Z286.E43 C667 1995#Electronic publishing#Portable document software##Text processing (Computer science)#Adobe Acrobat
Portable document files (PDF's) are used in many types of environments; such as,
office, world wide web, and desktop publishing to name a few. PDF technology
allows electronic documents to become truly portable. PDF files maintain their original look and feel across various computer systems and platforms. PDF use in a
prepress environment was tested by creating various electronic mechanicals with
numerous file formats and having these PDF files imaged across the country on various high resolution imagesetting devices. It has been determined that PDF files can
be used in a prepress environment at this point in time in some situations.
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O sucesso da inculturação do telemóvel nas comunidades moçambicanas e a sua múltipla funcionalidade social
Fonte: Revista Observatório
Publicador: Revista Observatório
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ;
Formato: application/pdf
Publicado em 06/10/2015
Português
Relevância na Pesquisa
150.63424%
A estrutura do trabalho é construída em três momentos: o primeiro discute a empregabilidade no dispositivo móvel na monitoria de governação. Nesta abordagem a reflexão tráz à superfície a questão do uso das mensagens SMS na monitoria dos processos eleitorais. O segundo momento debruça sobre o telemóvel no processo comunicativo, no qual são enfatizados os últimos progressos tecnológicos das infraestruturas de comunicação; o terceiro momento descreve o impactos da "Economia Móvel" nos processos de desenvolvimento do negócio e transações comerciais, onde se destaca o impacto social dos serviços móveis de consulta, transferências bancárias e pagamentos de serviços. Palavras-chave: Telemóvel; comunicação; economia móvel. ABSTRACT The structure of the work is built in two stages: The first discusses employability in the governance mobile monitoring device. In this approach to reflect back to the surface the issue of the use of SMS messages in the monitoring of electoral processes. The second phase focuses on the mobile phone in the communicative process in rural areas, which are emphasized in the latest technological advances in communications the impact infrastructure; the third phase describes the phone incorporating on business development processes and business transactions...
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Violência doméstica: análise e correlações do perfil educacional de autores e vítimas na cidade de arraias nos anos de 2012 a 2014
Fonte: Revista Observatório
Publicador: Revista Observatório
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ;
Formato: application/pdf
Publicado em 26/12/2015
Português
Relevância na Pesquisa
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Este estudo teórico/prático versa sobre a violência doméstica, problema de âmbito mundial. No Brasil conforme muitas pesquisas, tal violência tem inúmeras motivações, sobretudo cultural. A cidade de Arraias-TO não é exceção, sendo este tipo de violência fato recorrente naqueles lares, cidade objeto do estudo. Buscou-se evidenciar de forma sintética a problemática em nível mundial, nacional e por fim, em uma esfera mais detalhada, nos lares arraianos. O objetivo deste estudo foi compreender a violência doméstica a partir da aplicação e efetividade da Lei Maria da Penha correlacionando os fatos ao perfil educacional/profissional dos agressores e vítimas nos casos registrados na cidade de Arraias e verificar o quanto tal perfil interfere nos índices de violência praticada contra mulheres, bem ainda a recorrência dos fatos frente aos índices de retratações das ofendidas. Para tanto, se utilizou de fundamentação teórica, bem como da pesquisa de campo, com análise de 100% dos casos registrados nos últimos três anos na delegacia daquela circunscrição. Foram observados os boletins de ocorrências realizados pela aquela Unidade Policial a fim de se visualizar a aplicação e efetividade da lei. A análise recaiu ainda nos seguintes documentos: autos de procedimentos criminais...
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Dissertation Abstract; Resumo de Dissertação 10.5007/1518-2924.2006v11n22pii
Fonte: Departamento de Ciência da Informação – UFSC
Publicador: Departamento de Ciência da Informação – UFSC
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ;
Formato: application/pdf; application/pdf; application/pdf; application/pdf; application/pdf
Publicado em 13/11/2007
Português
Relevância na Pesquisa
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CORREIA, Anna Elizabeth Galvão Coutinho. Fluxo da informação no processo de pesquisa na UFPE. 2006. 176 f. Dissertação (Mestrado em Ciência da Informação)- Programa de Pós-Graduação em Ciência da Informação, Universidade Federal de Santa Catarina, Florianópolis, 2006. Texto na íntegra http://www.cin.ufsc.br/pgcin/AnnaCorreia.pdf DORIGON, Derli Sandra. Gestão de operações e qualidade dos serviços nas unidades de informação. 2006. 203 f. Dissertação (Mestrado em Ciência da Informação) - Programa de Pós-Graduação em Ciência da Informação, Universidade Federal de Santa Catarina, Florianópolis, 2006. Texto na íntegra http://www.cin.ufsc.br/pgcin/DerliDorigon.pdf MACHADO, Murilo Milton. OPEN ARCHIVES: novas alternativas de comunicação para o compartilhamento do conhecimento científico na Sociedade da Informação. 2006. Dissertação (Mestrado em Ciência da Informação). Universidade Federal de Santa Catarina, Florianópolis. Texto na íntegra http://www.tede.ufsc.br/teses/PCIN0015.pdf NINA, Renée Rosanne Vaz. Profissional da informação: o bibliotecário e suas representações das competências profissionais e pessoais para atuar em bibliotecas. 2006. 257f. Dissertação (Mestrado em Ciência da Informação) - Programa de Pós-Graduação em Ciência da Informação. Universidade Federal de Santa Catarina...
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Perimetría de duplicación de frecuencias en lesiones retroquiasmáticas
Fonte: Archivos de la Sociedad Española de Oftalmología
Publicador: Archivos de la Sociedad Española de Oftalmología
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion
Formato: text/html; application/pdf
Publicado em 01/03/2003
Português
Relevância na Pesquisa
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#Perimetría de doble frecuencia#lesiones retroquiasmáticas#defectos campimétricos neuro-oftalmológicos#hemianopsia#cuadrantanopsia
Objetivo: Determinar la utilidad de la perimetría de doble frecuencia (PDF) en la evaluación de lesiones retroquiasmáticas. Método: 21 pacientes con patrón campimétrico característico de lesiones retroquiasmáticas en perimetría automática (analizador de campos Humphrey, estrategia 24-2 SITA) fueron evaluados con PDF, realizándose test C-20 screening y umbral. Dos observadores independientes describieron el patrón de defecto campimétrico, congruencia y grado de respeto macular en las tres exploraciones. Resultados: El patrón de lesión hallado con el test 24-2 es deducido en el 63,2% y en el 70% de los ojos con las estrategias C-20 screening y umbral respectivamente. Las lesiones retroquiasmáticas fueron congruentes en el 45% de los casos en perimetría convencional y en el 5,6% y 15% con C-20 screening y umbral respectivamente. El respeto macular estuvo presente en el 45% de los casos con perimetría blanco-blanco y en el 89% y el 82% con C-20 screening y umbral respectivamente. Conclusiones: La PDF permite sospechar lesiones retroquiasmáticas en algo más de la mitad de los pacientes, tendiendo a infraestimar los defectos. No es útil para detectar respeto macular ni grado de congruencia perimétrica. Ambas estrategias de PDF ofrecen resultados similares...
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