8,521 research outputs found
Tipografia corporativa : codificação e descodificação gráfica
Trata-‐se
de
uma
investigação
que
visa
compreender
como
é
descodificada
a
Identidade
Visual
Corporativa,
com
o
intuito
de
aumentar
a
eficácia
comunicacional
do
trabalho
dos
designers
ao
nível
da
codificação,
considerando
o
objectivo
da
empresa
ou
marca.
Com
base
em
15
casos
de
estudo
e
através
de
quatro
questionários,
pretende-‐se
identificar
conotações
gráficas
de
logótipos
e
da
tipografia
corporativa,
atendendo
aos
interesses
estratégicos
da
empresa,
produto
ou
serviço
que
representam
e
ao
mercado
em
que
operam.
O
desígnio
dos
designers
ao
nível
da
Identidade
Visual
Corporativa
é
confrontado
com
a
percepção
pública,
de
modo
a
obter
dados
sobre
significados
conotativos
e
denotativos
veiculados
pela
tipografia
corporativa
e
o
modo
como
têm
influência
na
definição
da
Imagem
Corporativa.
É
objectivo
deste
estudo,
a
obtenção
de
dados
ou
método
de
suporte
e
avaliação
de
projectos
de
Identidade
Visual
Corporativa
Kelley-Seegmiller Syndrome: Urolithiasis, Renal Uric Acid Deposits, and Gout: What is the Role of the Urologist?
Kelley-Seegmiller syndrome (KSS) is a disorder that occurs when there is a partial deficiency of the enzyme hypoxanthine guanine phosphoribosyl transferase. It is involved in the metabolism of purines, clinically manifesting as hyperuricemia, hyperuricosuria, gout arthritis, and urolithiasis. The aim of this article is to present the case of a 33-year-old male with KSS, with left ureteral colic, and a 5-mm, 323-HU ureteral calculi, successfully managed with conservative management. It is critical to recognize that most urologists are not familiar with this inborn metabolic error and 75% of these patients will be affected by urolithiasis, thus making it a very critical and significant disease in our practice. © 2018 S. Karger AG, Basel
The Levi-Civita spacetime
We consider two exact solutions of Einstein's field equations corresponding
to a cylinder of dust with net zero angular momentum. In one of the cases, the
dust distribution is homogeneous, whereas in the other, the angular velocity of
dust particles is constant [1]. For both solutions we studied the junction
conditions to the exterior static vacuum Levi-Civita spacetime. From this study
we find an upper limit for the energy density per unit length of the
source equal for the first case and for the second
one. Thus the homogeneous cluster provides another example [2] where the range
of is extended beyond the limit value previously found in
the literature [3,4]. Using the Cartan Scalars technics we show that the
Levi-Civita spacetime gets an extra symmetry for or
. We also find that the cluster of homogeneous dust has a superior
limit for its radius, depending on the constant volumetric energy density
A novel notion of null infinity for c-boundaries and generalized black holes
We give new definitions of null infinity and black hole in terms of causal
boundaries, applicable to any strongly causal spacetime . These are
meant to extend the standard ones given in terms of conformal boundaries, and
use the new definitions to prove a classic result in black hole theory for this
more general context: if the null infinity is regular (i.e. well behaved in a
suitable sense) and obeys the null convergence condition, then any
closed trapped surface in has to be inside the black hole region. As an
illustration of this general construction, we apply it to the class of
generalized plane waves, where the conformal null infinity is not always
well-defined. In particular, it is shown that (generalized) black hole regions
do not exist in a large family of these spacetimes.Comment: 32 pages, 4 figures. Included new referenc
Stationary Cylindrical Anisotropic Fluid
We present the whole set of equations with regularity and matching conditions
required for the description of physically meaningful stationary cylindrically
symmmetric distributions of matter, smoothly matched to Lewis vacuum spacetime.
A specific example is given. The electric and magnetic parts of the Weyl tensor
are calculated, and it is shown that purely electric solutions are necessarily
static. Then, it is shown that no conformally flat stationary cylindrical fluid
exits, satisfying regularity and matching conditions.Comment: 17 pages Latex. To appear in Gen.Rel.Gra
Active gravitational mass and the invariant characterization of Reissner-Nordstrom spacetime
We analyse the concept of active gravitational mass for Reissner-Nordstrom
spacetime in terms of scalar polynomial invariants and the Karlhede
classification. We show that while the Kretschmann scalar does not produce the
expected expression for the active gravitational mass, both scalar polynomial
invariants formed from the Weyl tensor, and the Cartan scalars, do.Comment: 6 pages Latex, to appear in General Relativity and Gravitatio
Static Cylindrical Matter Shells
Static cylindrical shells composed of massive particles arising from matching
of two different Levi-Civita space-times are studied for the shell satisfying
either isotropic or anisotropic equation of state. We find that these solutions
satisfy the energy conditions for certain ranges of the parameters.Comment: 9 pages, 3 figures, Latex; Final version, To appear in General
Relativity and Gravitatio
Eficacia y seguridad del adhesivo tisular Tisuacryl en el cierre de la piel de la episiotomía
Se realizó un ensayo clínico fase III, en el Hospital Docente Materno Infantil 10 de Octubre, de
Ciudad de La Habana, Cuba, entre julio de 1999 y marzo del 2000, con el objetivo de evaluar la
eficacia y seguridad del adhesivo tisular Tisuacryl en el cierre de la piel de la episiotomía. Cada
grupo constó de 300 pacientes, de acuerdo a los criterios de inclusión establecidos para el ensayo.
En el grupo estudio se presentaron menos molestias en la episiorrafia (95.6 %) que en el grupo
control (56.3 %) a los 30 minutos post parto, así como al tercer día posterior al nacimiento (97.6 %
vs. 61.3 %). Al séptimo día, los resultados en el afrontamiento, estética y molestias en la herida
fueron significativamente mejores con el adhesivo tisular evaluado. Los riesgos relativos de resultados
adversos al séptimo día posterior al parto fueron 3.2 veces mayores en relación con afrontamiento
y 2.9 veces con la estética no satisfactorias cuando se utilizó catgut cromado al comparar
con el Tisuacryl. Para las molestias en la episiorrafia, el riesgo relativo se elevó a 24.2, todos con
diferencias estadísticas significativas. Se concluye que el uso del adhesivo tisular Tisuacryl para el
cierre de la piel en la episiotomía tiene menor probabilidad de afrontamiento y estética de la herida
no satisfactoria y de menor sensación dolorosa en la herida quirúrgica que el catgut cromado.Peer Reviewe
Effective Monopoles within Thick Branes
The monopole mass is revealed to be considerably modified in the thick
braneworld paradigm, and depends on the position of the monopole in the brane
as well. Accordingly, the monopole radius continuously increases, leading to an
unacceptable setting that can be circumvented when the brane thickness has an
upper limit. Despite such peculiar behavior, the quantum corrections accrued --
involving the classical monopole solution -- are shown to be still under
control. We analyze the monopole's peculiarities also taking into account the
localization of the gauge fields. Furthermore, some additional analysis in the
thick braneworld context and the similar behavior evinced by the topological
string are investigated.Comment: 7 pages, 1 figur
Numerical and Experimental Analysis of Sound Suppressor for a 5.56 mm Calibre
A sound suppressor is an internal or external device coupled to the barrel of a firearm. Its development has been historically related to the negative effects produced by the noise. This article presents the numerical and experimental analysis of a sound suppressor for a 5.56 mm caliber rifle. It was designed, manufactured, and tested inside a shooting tunnel for 911 m/s and 344 m/s velocities. Three geometric configurations with curved deflectors, conical deflectors, and finally with a reactive spiral capable of dissipating the acoustic wave were compared considering reactive and dissipative systems. The attenuation of the sound inside the silencer depends directly on the reduction of the projectile wave velocity and the deflagration of the gases at the instant of firing. Then the MIL-STD-1474E standard was used to carry out the experiments. The results in the computational numerical simulation show an average value of 143 dB for the considered three models, the Sound Pressure Level in the reactive core model decreased by 25% with respect to other proposals, which have an average value of 141 dB. These results can be useful to improve in the design of sound suppressors based on the needs of the users and under the specific characteristics of each weapon ballistic. 
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