5,949 research outputs found
Surgical complications related to temporomandibular joint arthroscopy: a prospective analysis of 39 single-portal versus 43 double-portal procedures
Temporomandibular joint (TMJ) arthroscopy is a minimally invasive
surgical procedure proposed for diverse TMJ intra-articular disorders. A
prospective study was designed with the aim of investigating intraoperative and
postoperative surgical complications for single and double-portal TMJ arthroscopy.
All interventions were performed by one surgeon with the same surgical protocol. A
total of 55 patients were enrolled, resulting in 82 TMJ arthroscopies (28 unilateral
and 27 bilateral). A total of 39 single portal (47.57%) and 43 double-portal (52.43%)
arthroscopies were performed. No severe and irreversible complications were
observed. Most complications were resolved after 4 weeks. Double-portal was
associated with more complications (n = 23) compared with single-portal TMJ
arthroscopy (n = 14), with a statistically significant difference found between single
and double-portal TMJ arthroscopy in two intraoperative complications: intra-
articular bleeding (P = 0.044) and oedema of the preauricular area (P = 0.042). This
study confirms the safety of TMJ arthroscopy for single and double-portal
procedures, with the authors suggesting a multicentre study, in an effort to minimize
any possible bias.info:eu-repo/semantics/publishedVersio
Gender gap in the ERASMUS mobility program
Studying abroad has become very popular among students. The ERASMUS mobility
program is one of the largest international student exchange programs in the
world, which has supported already more than three million participants since
1987. We analyzed the mobility pattern within this program in 2011-12 and found
a gender gap across countries and subject areas. Namely, for almost all
participating countries, female students are over-represented in the ERASMUS
program when compared to the entire population of tertiary students. The same
tendency is observed across different subject areas. We also found a gender
asymmetry in the geographical distribution of hosting institutions, with a bias
of male students in Scandinavian countries. However, a detailed analysis
reveals that this latter asymmetry is rather driven by subject and consistent
with the distribution of gender ratios among subject areas
Produção de mudas de vinca e pimenta ornamental em substratos à base de resíduos orgânicos agroindustriais e agropecuários.
bitstream/item/135012/1/COT12009.pd
Caracterização do óleo de pinhão-manso (Jatropha curcas L.).
O pinhão manso (Jatropha curcas L.), pertencente a familia Euphorbiaceae, e uma planta nativa da America tropical, naturalizada em partes tropicais e subtropicais da Africa e Asia. Sua distribuição geografica e bastante vasta devido a sua rusticidade, resistencia a longas estiagens, bem como a pragas e doencas, sendo adaptavel a condicoes edafoclimaticas muito variaveis. O fruto de J.curcas contem oleo viscoso que pode ser usado na industria de cosmeticos, como substituto do querosene, e na fabricacao de sabao e combustivel para motores diesel. Este trabalho tem como objetivo caracterizar o oleo de pinhao manso segundo sua composicao quimica e parâmetros fisico-quimicos, tendo em vista sua utilizacao para a producao de biocombustivel..
Statistical Mechanics Characterization of Neuronal Mosaics
The spatial distribution of neuronal cells is an important requirement for
achieving proper neuronal function in several parts of the nervous system of
most animals. For instance, specific distribution of photoreceptors and related
neuronal cells, particularly the ganglion cells, in mammal's retina is required
in order to properly sample the projected scene. This work presents how two
concepts from the areas of statistical mechanics and complex systems, namely
the \emph{lacunarity} and the \emph{multiscale entropy} (i.e. the entropy
calculated over progressively diffused representations of the cell mosaic),
have allowed effective characterization of the spatial distribution of retinal
cells.Comment: 3 pages, 1 figure, The following article has been submitted to
Applied Physics Letters. If it is published, it will be found online at
http://apl.aip.org
Invasion Percolation Between two Sites
We investigate the process of invasion percolation between two sites
(injection and extraction sites) separated by a distance r in two-dimensional
lattices of size L. Our results for the non-trapping invasion percolation model
indicate that the statistics of the mass of invaded clusters is significantly
dependent on the local occupation probability (pressure) Pe at the extraction
site. For Pe=0, we show that the mass distribution of invaded clusters P(M)
follows a power-law P(M) ~ M^{-\alpha} for intermediate values of the mass M,
with an exponent \alpha=1.39. When the local pressure is set to Pe=Pc, where Pc
corresponds to the site percolation threshold of the lattice topology, the
distribution P(M) still displays a scaling region, but with an exponent
\alpha=1.02. This last behavior is consistent with previous results for the
cluster statistics in standard percolation. In spite of these discrepancies,
the results of our simulations indicate that the fractal dimension of the
invaded cluster does not depends significantly on the local pressure Pe and it
is consistent with the fractal dimension values reported for standard invasion
percolation. Finally, we perform extensive numerical simulations to determine
the effect of the lattice borders on the statistics of the invaded clusters and
also to characterize the self-organized critical behavior of the invasion
percolation process.Comment: 7 pages, 11 figures, submited for PR
Uso de hipoclorito de sódio para acelerar a emergência das plântulas e desenvolvimento das mudas de cafeeiro.
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Previous issue date: 2009-11-1
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