Coupled quintessence and vacuum decay

We discuss observational consequences of a class of cosmological models characterized by the dilution of pressureless matter attenuated with respect to the usual $a^{-3}$ scaling due to the decay of vacuum energy. We carry out a joint statistical analysis of observational data from the new \emph{gold} sample of 182 SNe Ia, recent estimates of the CMB shift parameter, and BAO measurements from the SDSS to show that such models favor the decay of vacuum only into the dark matter sector, and that the separately conserved baryons cannot be neglected. In order to explore ways to more fundamentally motivated models, we also derive a coupled scalar field version for this general class of vacuum decay scenarios.Comment: 6 pages, 3 figures, LaTe

Implicações Fetais e Pós-Natais da Depressão Materna

A gravidez é um período de mudança na vida da mulher, na qual decorrem alterações físicas, psíquicas e sociais que podem ter consequências ao nível da sua saúde mental. Da mesma forma, a saúde mental materna influencia a forma como decorre a gravidez. A depressão durante a gravidez integra-se no grupo das doenças mentais perinatais. Estima-se que, em 2011, nove em cada 100 mulheres grávidas cumprissem os critérios para Perturbação Depressiva Major. Esta psicopatologia pode ter efeitos dramáticos tanto para a mulher, como para o seu filho, e apresenta-se com sintomas inespecíficos, alguns similares aos exibidos durante uma gravidez normal, sendo frequentemente desvalorizados. O feto é particularmente suscetível às alterações do meio onde se desenvolve. A existência de sintomatologia depressiva provoca alterações na grávida que podem ter consequências no desenvolvimento fetal, nomeadamente no que se refere ao sistema nervoso central. Estas alterações relacionam-se com circuitos envolvidos na resposta emocional e comportamental, podendo acarretar riscos para o feto e, posteriormente, para a criança. A presente dissertação tem como objetivo principal compreender as consequências da exposição a sintomatologia depressiva materna na descendência, particularmente no que se refere ao desenvolvimento neurológico, psicomotor, cognitivo e comportamental, aos padrões de sono e à ocorrência de cólicas do lactente.Pregnancy is a period of change in women’s life, in which physical, psychological and social changes occur that might impact their mental health. Likewise, maternal mental health impacts the pregnancies’ course. Depression during pregnancy is part of a group of perinatal mental disorders. It is estimated that, in 2011, nine out of 100 pregnant women met the criteria for major depressive disorder. This psychopathology can have dramatic effects for both the woman and her child and present with nonspecific symptoms, some of which are similar to those exhibited during a normal pregnancy and are often devalued. The fetus is particularly susceptible to changes in the environment in which it develops. The existence of depressive symptomatology causes physiological changes in the pregnant woman that can have consequences in the fetal development, especially with regard to the central nervous system. These changes are related to neural circuits involved in the emotional and behavioral response, and may carry risks to the fetus. Thus, this dissertation aims to understand the consequences of maternal depressive symptomatology exposure in the offspring, particularly to neurological, psychomotor, cognitive and behavioral development, sleep patterns and the occurrence of infant colic

On the Influence of Latent Semantic Analysis Parameterization for Bug Localization

The bug localization problem has benefited from modern information retrieval techniques, such as Latent Semantic Analysis. There are many factors that influence the quality of results of this approach, such as, stop-words, term-documentmatrix transformations, dimensionality reduction and filtering criteria of the corpus. In this paper, we study the effect of different combinations for these factors on the impact of the accuracy of the query results in the proposed technique for bug localization. Bugs of three real-world software systems were analyzed with different combinations of input parameters for the LSA technique. Our results suggest that the term-document matrix transformations and filtering criteria of the corpus have major influence in the quality of the result and that the combination of adequate individual parameter values does not necessarily produce the best combination. Furthermore, some general guidance for parameterization of the LSA technique for bug localization could also besuggested from the observed results

Meconium aspiration syndrome: identifying obstetric and neonatal risk situations

Objective: To identify situations of obstetric and neonatal risk that favored meconium aspiration syndrome as well as complications in clinical evolution presented by these neonates. Method: Iit is a quantitative, retrospective study and documentary analysis, conducted from January 2009 to December 2010. Data from 40 medical records were recorded in a database and analyzed using descriptive statistical analysis software. Results: 67,5% of mothers had fewer than six prenatal consultations and 42,5% had complications during pregnancy. Cesarean section predominated with 75%, indicated by fetal distress. There were 90% of neonates had an average gestational age of 37 weeks or more, 82,5% had an Apgar score below 7, requiring resuscitation at birth and ventilatory support. Conclusion: Proper monitoring of pregnant women throughout pregnancy cycle and in labor as well as the need to care for neonates in the delivery room can reduce the incidence of the syndrome