Modelos de sobrevivência com fração de cura e erro de medida nas covariáveis

In this work, we study the survival cure rate model proposed by Yakovlev et al. (1993), based on a competing risks structure concurring to cause the event of interest, and the approach proposed by Chen et al. (1999), where covariates are introduced to model the risk amount. We focus the measurement error covariates topics, considering the use of corrected score method in order to obtain consistent estimators. A simulation study is done to evaluate the behavior of the estimators obtained by this method for finite samples. The simulation aims to identify not only the impact on the regression coefficients of the covariates measured with error (Mizoi et al. 2007) but also on the coefficients of covariates measured without error. We also verify the adequacy of the piecewise exponential distribution to the cure rate model with measurement error. At the end, model applications involving real data are made

Amor como medida de satisfação marital

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Medida da preditividade de instrumentos psicológicos nas avaliações psicológicas de condutores

The object of this study was to identify the possibility of predicting the involvement in traffic infractions from the results of the psychological tests carried out by psychologists specialized in the process of driver licensing in the state of Rio Grande do Norte (RN). The proposal consisted in identifying the penalty points recorded in national driving licenses (CNH) and identifying the corresponding tests and scores obtained, verifying if the average scores in the tests of drivers with and without an infraction record were significantly different and if there is any relation between the test scores and the frequency of the infractions. The results of the psychological instruments were collected in two moments the first being in the act of acquisition of the CNH and the second being during license renewal at the only certified clinic and at the DETRAN-RN. A population of 839 drivers of 14 municipalities were identified. 127 protocols of psychological tests were identified in the records of the DETRAN-RN (2002) and 76 at the clinic (2007), pointing out failures in the process of safekeeping of the psychological material, as well as in its retrieval from the record files. The sample was thus reduced to 68 drivers, all male, with age range between 18 and 41 years old, mean of 21,72 years old (DP = 5,24). 54 drivers were identified without a record of infraction, and 14 with a record. The latter committed 29 infractions. The penalty points recorded in their CNH ranged from 0 to 35 and the typical value of points (median) was zero. In the group with a record of infractions the number of points ranged between 3 and 35, mean of 10,79 (DP = 7,73). Differences were observed in the composition of the battery of tests in the two moments with the same subjects. The use of different tests to assess the same construct of the subject, first and second moment of assessment, did not allow for some analyzes with more efficient statistical proof. It was pointed out that five tests were not carried out and 118 were not corrected/analyzed. Significant differences between the groups were not identified with the psychological instruments used. In another attempt to establish differences between the means, the application of the independent t-Test evidenced a significant difference in the scores of the instruments of concentrated attention in 2002 (t = 2,21, gl = 25, p = 0.037) and of diffuse attention in 2002 (t = 2,37, gl = 24, p = 0.026). The results also did not evidence significant correlation between the scores of the tests and the penalty points of the infractions. Based on this study, it cannot be concluded with precision that the high or low scores are good criteria to determine that a driver will commit more or less traffic infractions, nor that the drivers with higher scores in the tests commit less infractions and vice-versa. Furthermore, the problems to find the instruments and the most basic data require a stronger monitoring on the part of the certified clinic and of the DETRAN-RN.

Adolescência e violência: um estudo da medida socioeducativa de prestação de serviço a comunidade no município do Natal

This Project was built to reflect about juvenile violence and the socio-educational´s range of community services provision. It is known that the juvenile violence is a phenomenon inserted on the capitalism system, backed on neo liberal project. Though, it is essential a historical analysis, showing the economical, political, social and cultural mechanisms which determine the juvenile violence personality. On this way, it is seek understand the elements that leads on work world changes, on the State and public politics sphere, that deepens social dissimilarities. On this propose, it is known that there is a relation among the violence, while one of many manifestations of social question on society and the macroestructuals´determinant that lead the teenager to a social rick situation. This research focused on a inquiry quail-quantitative, using the theoric-metodological procedures of observation, interview and documental quest techniques. The universe had been defined by the intentional sample of 22 interviewed on total, during August and October 2008, covering adolescents and their relatives, technical and the coordinator, which subsidized the Socio educational program of community services provision from Natal analysis of limits and their range. The results of this investigation indicate the necessity of development, with the teenagers authors of infringement acts, a care system that is grounded on a professional formation, respect on human rights and citizenship conquest, regarding that children and teenagers are designed as people on development, that have theirs rights and integral protection, being the State, society and family responsibility assure the integral development of them

Medida de uma codificação de estímulos sonoros por potenciais pós-sinápticos e potenciais de campo local usando teoria da informação

Coding process is a fundamental aspect of cerebral functioning. The sensory stimuli transformation in neurophysiological responses has been a research theme in several areas of Neuroscience. One of the most used ways to measure a neural code e ciency is by the use of Information Theory measures, such as mutual information. Using these tools, recent studies show that in the auditory cortex both local eld potentials (LFPs) and action potential spiking times code information about sound stimuli. However, there are no studies applying Information Theory tools to investigate the e ciency of codes that use postsynaptics potentials (PSPs), alone and associated with LFP analysis. These signals are related in the sense that LFPs are partly created by joint action of several PSPs. The present dissertation reports information measures between PSP and LFP responses obtained in the primary auditory cortex of anaesthetized rats and auditory stimuli of distinct frequencies. Our results show that PSP responses hold information about sound stimuli in comparable levels and even greater than LFP responses. We have also found that PSPs and LFPs code sound information independently, since the joint analysis of these signals did neither show synergy nor redundancy.

Reabilitação Oclusal com Prótese Parcial Removível Provisória Tipo “Overlay” – Relato de Caso

An appropriate design of a prosthetic rehabilitation should not impute the restoration of occlusal vertical dimension (OVD) to new prostheses, at the risk of the patient does not adapt to a new condition, since a certain amount of time is often necessary for adaptation to a new OVD. This article performed prosthetic rehabilitation with an overlay provisional removable partial denture prior to definitive treatment because the patient showed a considerable decrease in the OVD. Three techniques for OVD determination were used. It is possible to conclude that the use of interim removable partial dentures is of great importance at the beginning of the rehabilitation treatment in order to adapt the patient to a new occlusal condition.

Reabilitação Oclusal com Prótese Parcial Removível Provisória Tipo “Overlay” – Relato de Caso

An appropriate design of a prosthetic rehabilitation should not impute the restoration of occlusal vertical dimension (OVD) to new prostheses, at the risk of the patient does not adapt to a new condition, since a certain amount of time is often necessary for adaptation to a new OVD. This article performed prosthetic rehabilitation with an overlay provisional removable partial denture prior to definitive treatment because the patient showed a considerable decrease in the OVD. Three techniques for OVD determination were used. It is possible to conclude that the use of interim removable partial dentures is of great importance at the beginning of the rehabilitation treatment in order to adapt the patient to a new occlusal condition.