130,516 research outputs found
Desfechos perinatais das gestantes diagnosticadas com s?filis e atendidas em ambulat?rio especializado do SUS do munic?pio de Chapec? - SC, no ano de 2017
Get PDFSegundo a Organiza??o Mundial da Sa?de (OMS), em 2016, havia mais de meio milh?o (cerca
de 660 mil) de casos de s?filis cong?nita no mundo, resultando em mais de 200 mil natimortos
e mortes neonatais. Dessa forma, o presente estudo objetivou analisar os fatores preditivos para
desfechos perinatais desfavor?veis em gestantes diagnosticadas com s?filis no munic?pio de
Chapec?-SC em 2017. Foi realizado um estudo de coorte retrospectivo em gestantes
diagnosticadas com s?filis neste munic?pio. O desfecho gestacional desfavor?vel (aborto, ?bito
fetal, ?bito neonatal ou malforma??o cong?nita) ocorreu em 8,8% das mulheres diagnosticadas
com s?filis acompanhadas no estudo. Estiveram associados com os agravos desfavor?veis ter
35 anos ou mais, cor da pele n?o branca e ter realizado at? seis consultas pr?-natais. Conclui-se
que a qualidade da assist?ncia anteparto, em especial relacionada ao n?mero de consultas pr?natais,
est? diretamente associada ? ocorr?ncia ou n?o de desfechos desfavor?veis. Faz-se
tamb?m necess?ria uma maior aten??o dos profissionais da sa?de para o monitoramento das
gestantes com idade de 35 anos ou mais e de cor de pele n?o branca a fim de prevenir aborto,
?bito fetal, ?bito neonatal e m? forma??es cong?nitas, bem como a ado??o de medidas certeiras
de diagn?stico precoce e tratamento adequado
Oil price shocks and stock market returns: New evidence from the United States and China
Get PDFThis study examines the time-varying correlations between oil prices shocks of different types (supply-side, aggregate demand and oil-market specific demand as per Kilian (2009) who highlighted that "Not all oil shocks are alike") and stock market returns, using a Scalar-BEKK model. For this study we consider the aggregate stock market indices from two countries, China and the US, reflecting the most important developing and developed financial markets in the world. In addition to the whole market, we also consider correlations from key selected industrial sectors, namely Metals & Mining, Oil & Gas, Retail, Technology and Banking. The sample period runs from 1995 until 2013. We highlight several key points: (i) correlations between oil price shocks and stock returns are clearly and systematically time-varying; (ii) oil shocks of different types show substantial variation in their impact upon stock market returns; (iii) these effects differ widely across industrial sectors; and finally (iv) China is seemingly more resilient to oil price shocks than the US
MeSH term explosion and author rank improve expert recommendations
Get PDFInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Fiscal policy, government size and EMU business cycle synchronisation
Get PDFWe provide new evidence on the effects of fiscal policy and government size on
pairwise business cycle synchronisation in EMU. A novel time-varying framework is
employed to estimate business cycle synchronisation and subsequently a panel approach is used
to establish the role of fiscal variables in determining the pairwise synchronisation observations
across time. The findings suggest similarities in the size of the public sector, yet divergence in
fiscal policy stance, matter for the determination of business cycle synchronisation. Hence,
increased fiscal federalism in EMU will contribute to increased business cycle synchronisation.
Our results remain robust to different specifications and sub-periods
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Macro economy, stock market and oil prices: Do meaningful relationships exist among their cyclical fluctuations?
Get PDFThis paper examines the relationship among consumer price index, industrial production, stock market and oil prices in Greece. Initially we use a unified statistical framework (cointegration and VECM) to study the data in levels. We then employ a multivariate VAR model to examine the relationship between the cyclical components of our series. The period of the study is from 1996:1 – 2008:6. Findings suggest that oil prices and the stock market exercise a positive effect on the Greek CPI, in the long run. Cyclical components analysis suggests that oil prices exercise significant negative influence to the stock market. In addition, oil prices are negatively influencing CPI, at a significant level. However, we find no effect of oil prices on industrial production and CPI. Finally, no relationship can be documented between the industrial production and stock market for the Greek market. The findings of this study are of a particular interest and importance to policy makers, financial managers, financial analysts and investors dealing with the Greek economy and the Greek stock market
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
Get PDFBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Dynamic Spillovers of Oil Price Shocks and Policy Uncertainty
No full textThis study examines the dynamic relationship between changes in oil prices and the economic policy uncertainty index for a sample of both net oil-exporting and net oil-importing countries over the period 1997:01-2013:06. To achieve that, we extend the Diebold and Yilmaz (2009, 2012)
dynamic spillover index using structural decomposition. The results reveal that economic policy uncertainty (oil price shocks) responds negatively to aggregate demand oil price shocks (economic policy uncertainty shocks). Furthermore, during the Great Recession of 2007-2009, total spillovers
increase considerably, reaching unprecedented heights. Moreover, in net terms, economic policy uncertainty becomes the dominant transmitter of shocks between 1997 and 2009, while in the post-2009 period there is a significant role for supply-side and oil specific demand shocks, as net transmitters of spillover effects. These results are important for policy makers, as well as, investors
interested in the oil market. (authors' abstract)Series: Department of Economics Working Paper Serie
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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