8,539 research outputs found
Revised Coordinates and Proper Motions of the Stars in the Luyten Half-Second Catalogue
We present refined coordinates and proper motion data for the high proper
motion (HPM) stars in the Luyten Half-Second (LHS) catalogue. The positional
uncertainty in the original Luyten catalogue is typically >10" and is often
>30". We have used the digital scans of the Palomar Observatory Sky Survey
(POSS) I and POSS II plates to derive more accurate positions and proper
motions of the objects. Out of the 4470 candidates in the LHS catalogue, 4323
objects were manually re-identified in the POSS I and POSS II scans. A small
fraction of the stars were not found due to the lack of finder charts and
digitized POSS II scans. The uncertainties in the revised positions are
typically ~2", but can be as high as ~8" in a few cases; this is a large
improvement over the original data. Cross-correlation with the Tycho-2 and
Hipparcos catalogues yielded 819 candidates (with m_R < 12). For these brighter
sources, the position and proper motion data have been replaced with the more
accurate Tycho/Hipparcos data. In total, we have revised proper motion
measurements and coordinates for 4040 stars and revised coordinates for 4330
stars, which are presented here.Comment: 108 pages. Accepted for Publication in ApJ Suppl. Some errors caused
by the transcription errors in the original LHS catalogue have been corrected
in this resubmission. The most current version of the catalogue is also
available online at http://www.stsci.edu/~ksahu/lh
Diaphragmatic Hernias
info:eu-repo/semantics/publishedVersio
Epidemiologia da Asma Grave
A asma brônquica associa-se a apreciáveis taxas de morbilidade, traduzindo-se por um elevado número de recursos ao serviço de urgência e internamentos hospitalares. Apesar de uma tendência decrescente observada nas últimas décadas nas taxas de mortalidade associadas a esta doença, verifica-se ainda um número significativo de óbitos evitáveis por asma.
Os autores apresentam os dados nacionais relativos aos óbitos por asma (dados fornecidos pelo Instituto Nacional
de Estatística) e aos internamentos hospitalares por asma (dados fornecidos pelo Instituto de Gestão Informática e Financeira do Ministério da Saúde - Grupos de Diagnósticos Homogéneos: diagnósticos de saída), durante a última década, avaliando também estes dados por sexo, grupo etário e local de residência. Realça-se a importância do diagnóstico e tratamento precoces da asma, prevenindo formas graves e perspectivando a optimização da qualidade de vida e controlo da doença
Rhinitis: Epidemiological Knowledge in Portugal
Nas últimas décadas verificou-se, nos paises Ocidentais, um aumento substancial na prevalência de rinite alérgica, sendo o subdiagnóstico e o subtratamento diliculdades acrescidas para a qualidade de vida dos doentes com esta doença inflamatória crónica.É objectivo deste trabalho de revisão, apresentar dados epidemiológicos nacionais referentes à prevalência de rinite, caracterizando alguns factores de risco, realçando-se o problema da falta de diagnóstico desta situação c1ínica tão prevalente no nosso pais
usefulness of testing with PEG 1500 extract
Background. Polyethylene glycol (PEG) is being used for first time as an excipient for mRNA anti-SARS-CoV-2 vaccines containing-PEG2000, highlighting it as a potential cause of anaphylaxis. Objective. To assess the usefulness of skin tests using PEG1500 extract in patients with suspected allergy to SARS-CoV-2 vaccines. Methods. We evaluated 126 patients with moderate-high risk of allergy to SARS-CoV-2 vaccines referred to our department from March-December 2021. Skin tests were performed with PEG1500 extract (Roxall), using a stepwise approach, with readings at 30 minutes: prick tests with 0.1%, 1% and 10% concentrations; if negative, intradermal tests with 0.0001%, 0.001% and 0.01% concentrations. The same protocol was applied to 5 healthy controls. Results. Six patients had positive immediate intradermal tests with PEG1500, all with severe PEG allergy: one with a near-fatal anaphylaxis after glucocorticoid injection containing-PEG3350 and five with systemic allergic reactions after mRNA vaccines containing-PEG2000 (Pfizer-BioNTech or Moderna). One patient developed anaphylaxis during intradermal test. These six patients were negative to polysorbate 80. The remaining 120 patients had negative tests to PEG1500; seven had positive tests to polysorbate 80. All controls had negative tests. Conclusions. To our knowledge this is the first study describing the allergy work-up testing with PEG1500 commercial extract in the scope of SARS-CoV-2 vaccination. The algorithm designed for skin tests revealed to be a useful tool. Severe PEG allergy was diagnosed in 5% of patients, contraindicating PEG-containing vaccines. PEG allergy was excluded in one hundred patients that afterwards took SARS-CoV-2 vaccines containing-PEG2000. Investigation should be conducted in specialized drug allergy centres.authorsversionpublishe
Assessing the quality of the relation between scalarizing function parameters and solutions in multiobjective optimization
Different Multi-Objective Optimization Methods
(MOOM) for solving Multi-Objective Optimization Problems
(MOOP) have been suggested in the literature. These methods
often comprise two stages (not necessarily sequential): i) the
search for the Pareto-optimal set and ii) the selection of a single
solution from this non-dominated set. Various studies
comparing performance of particular aspects of these methods
have been carried out. However, a theoretical support that
changes on the preferences of a Decision Maker (DM) will be
reflected in the same way on the solution of the MOOP given by
the MOOM has not been presented. In this work a consistency
measure to assess MOOM is proposed. It will used to compare
the performance of different methods available in the
literature. This study was performed using some benchmark
test problems, with two criteria.This work was supported in part by the Portuguese Fundacao para a Ciencia e Tecnologia under grants: PTDC/GES/70168/2006 and SFRH/BD/22808/2005
The influence of coastal processes on inner shelf sediment distribution : the Eastern Algarve Shelf (Southern Portugal)
This study examines sediment distribution patterns in the Southeastern Algarve inner shelf (southern Portugal), an area characterized by marked variations in its coastal environment and low continental supply of sediments. The specific goals of this study were to identify the principal sediment sources and the factors influencing sediment transport paths and deposition. A total of 199 samples, collected along the shelf from the Guadiana River mouth to Olhos de Água, were analyzed. Grain-size distribution and parameters were measured for all the samples. Terrigenous and biogenic components of sand were identified in 38 samples, and results analyzed using multivariate non-linear multidimension scaling (MDS) and cluster analysis. Patterns of sediment distribution in this area of the inner shelf vary according to water depth and exhibit significant longshore variation, related mainly to coastal processes (littoral drift and storm currents) and to a lower degree to sediment sources. Sand is dominant at all depths, reflecting the influence of littoral drift in the supply and redistribution of shelf sediments. Fine and gravelsized deposits are significant in specific areas and are usually associated with changes in sediment composition. Five sectors have been identified according to sedimentary dynamics. The results, based on geostatistical and multivariate analysis, have allowed detailed sediment distribution maps to be generated, which represent an update of the existing cartography and serve as a tool for the management of coastal and marine resources. They have been furthermore compared with inner shelf sediment dynamics in other regions worldwide, to distinguish between specific regional responses to forcing mechanisms and processes that are more generalized within this type of shelf environments. In this context, the results obtained results in the Algarve study area are of great interest for the understanding of sediment dynamics of sand dominated inner shelves with reduced continental suppl
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