Generalized Renewal Processes are useful for approaching the rejuvenation of dynamical systems resulting from planned or unplanned interventions. We present new perspectives for the Generalized Renewal Processes in general and for the Weibull-based Generalized Renewal Processes in particular. Disregarding from literature, we present a mixed Generalized Renewal Processes approach involving Kijima Type I and II models, allowing one to infer the impact of distinct interventions on the performance of the system under study. The first and second theoretical moments of this model are introduced as well as its maximum likelihood estimation and random sampling approaches. In order to illustrate the usefulness of the proposed Weibull-based Generalized Renewal Processes model, some real data sets involving improving, stable, and deteriorating systems are used.

This article develops a model for dependent and imperfect condition-based preventive and corrective maintenance actions. The approach is based on the combination of the intensity proportional repair alert, a competing risks-based model and the generalized renewal process. Typically, intensity proportional repair alert can identify either how preventive actions may modify the distribution of the time between critical failures or how corrective events may change the frequency of preventive maintenances, but this method fails to analyze the effectiveness of the maintenance actions because they are treated as being perfect. On the other hand, generalized renewal process is able to capture the quality of maintenance, classifying it as perfect, minimal or imperfect depending on the value of a rejuvenation parameter. However, generalized renewal process cannot distinguish how different types of maintenance influence each other as intensity proportional repair alert does. Therefore, the intensity proportional repair alert-generalized renewal process hybrid approach is proposed here to fill this gap. This article also develops the maximum likelihood estimators for the proposed model as well as a Monte Carlo-based algorithm to estimate the expected number of preventive and corrective maintenances over time. The proposed model is validated through two example applications for which the intensity proportional repair alert-generalized renewal process model results show close agreement with the failure datasets.

In practical applications, the presence of delays can deteriorate the performance of the control system or even cause plant instability. However, by properly controlling these delays, it is possible to improve the performance of the mechanism. The present work is based on a proposal to analyze the asymptotic stability and convergence of a quadrotor robot, an unmanned aerial vehicle (UAV), on the performance of a given task, under time delay in the data flow. The effects of the communication delay problem, as well as the response-signal behavior of the quadrotors in the accomplishment of positioning mission are presented and analyzed from the insertion of fixed time delay intervals in the UAVs' data collected by its sensors system. Due to the large search space in the set of parameter combinations and the high computational cost required to perform such an analysis by sequentially executing thousands of simulations, this work proposes an open source GPU-based implementation to simulate the robot behavior. Experimental results show a speedup up to 4900x in comparison to MATLAB® implementation. The implement is available in Colab Google platform.

Os FPGAs oferecem eficiência energética para o desenvolvimento de aceleradores para fluxo de dados na Nuvem. Porém, existem vários desafios para popularizar seu uso. Dentre eles, podemos citar o tempo de compilação (que pode demorar horas) e conhecimento de hardware para uso adequado de linguagens de síntese de alto nível. Recentemente, a ferramenta READY possibilitou a redução do tempo de compilação e configuração para microsegundos. O ambiente foi validado na plataforma em nuvem HARP 2 da Intel/Altera. Apesar da integração com a Linguagem C++ para o desenvolvimento das aplicações, o acelerador é descrito de forma textual como um grafo. Neste trabalho é apresentado a extensão PLAIN, que inclui uma interface online gráfica para descrição dos aceleradores, a automatização do fluxo de projeto, dois níveis de simulação e um nível de execução. A ferramenta também mostra estatísticas de desempenho e permite criação de novos operadores para exploração do espaço de projeto.

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Self-inflicted violence is a serious public health problem with diverse repercussions on society. It has varied causes ranging from biological to sociocultural factors, which have increased in recent years. They are defined as any intentional behavior involving direct aggression to the body, without conscious intention of suicide, however, which may culminate in this negative outcome. Given this, this production aimed to analyze the cases of self-inflicted injuries in the state of Pernambuco from 2013 to 2017 and discuss about this public health problem. For this purpose, only secondary data, obtained through the Notification Disease Information System (SINAN), concerning the frequency of selfharm caused by adolescents in Pernambuco between 2013-2017, were used and then organized into spreadsheets. of Excel 2016® for analysis and graphing. Among the main results, it was found that the number of self-inflicted injuries by adolescents has increased in recent years and it was evidenced that the silence of society in relation to the theme, have contributed to this increase, because this is not discussed and society, In general, it fails to notice or ignore these signs of adolescent suffering and thus camouflaging this growing public health problem, the lack of information and explanation about the risks of self-destructive behavior also contributes to this aggravation. It was also identified that most of the reported cases were in female adolescents throughout the study period, noting the suffering of this public, which may be related to gender issues and the chauvinistic inheritance that still persists in Brazilian society, of the submission of women. Woman relative to man. Regarding race / color, there was a predominance in brown people, followed by white, however it is emphasized the high proportion (14.07%) of chips with this item ignored, which may result in misinterpretation. Given this, there is an urgent need to strengthen actions and programs aimed at preventing this problem through the creation and implementation of public policies. It is also necessary to train health professionals and those who work with adolescents so that they can identify signs of these practices and to prevent their aggravation. In addition to the extreme importance of putting this issue on the agenda in society and breaking the socially created stigma and taboo on self-harm and suicide.

Abstract:In order to develop manpower expertise in the area of oil, natural gas and biofuels, the National Petroleum Agency -NPA -has been promoting training programs for Human Resources (PHR) Resumo: Visando desenvolver mão de obra especializada na área de petróleo, gás natural e biocombustíveis, a Agência Nacional do Petróleo -ANP -tem promovido programas de capacitação de Recursos Humanos (PRH) em todo o País. Com o objetivo de elaborar as estratégias subjacentes a tais programas de maneira estruturada e abrangente, métodos de administração tais como Balanced Scorecard (BSC) vêm sendo adotados. Contudo, infortúnios como a não mensuração das incertezas envolvidas até o alcance dos objetivos almejados sugerem a adoção de formalismos mais sofisticados, tais como redes Bayesianas (RB), em detrimento da BSC. Em se tratando de RBs, o desafio passa a ser uma quantificação adequada dos seus parâmetros, possibilitando estimativas confiáveis a partir delas. O objetivo do presente trabalho é avaliar o desempenho de RBs no suporte a um dado problema real de PRH, a partir do confronto entre seus prognósticos e o que foi de fato observado. O modelo em questão foi elaborado a partir de um BSC e posteriormente quantificado de acordo com opiniões de especialistas, devido à total ausência de dados empíricos relevantes. A RB foi delineada para dar suporte à definição e implantação de estratégias para o desenvolvimento científico e abertura de mercados especializados para dado curso de engenharia de uma universidade federal do País. As análises realizadas indicam o bom desempenho do modelo e apontam como um dos principais componentes responsáveis o método de quantificação adotado.Palavras-chave: Programa de recursos humanos. Planejamento estratégico. Balanced scorecard. Redes Bayesianas. Métodos de edução. Coleta de opiniões.

Objective: This study evaluated the bacterial removal in flattened root canals after preparation with different tapers of ProDesign Logic instruments. Methodology: Fifty-five mandibular incisors with flattened root canals were contaminated with a pure culture of Enterococcus faecalis ATCC 29212 for 21 days at 37ºC. Root canals preparation was performed using ProDesign Logic and 0.9% sterile saline solution for irrigation. The specimens were randomly allocated to three experimental groups (n = 15) according to the taper of the instrument used: 25.03, 25.04, or 25.06. Intracanal bacteriological samples were taken before (S1) and after (S2) preparation and the number of colony-forming units per milliliter (CFU/mL) was calculated. Differences in bacterial counts before and after treatment, within each group, were analyzed by the paired t-test. Groups were compared by ANOVA with a post hoc test. The level of significance was set at p <0.05. Results: Mature biofilm formation was confirmed at root canal walls by scanning electron microscopy. Bacterial colonies were significantly reduced in all experimental groups at S2 compared to S1 (p <0.001). No significant difference was observed between groups regarding the percentage of bacterial reduction (p >0.05). Conclusion: Preparation of flattened root canals using ProDesign Logic instruments with tapers of 0.03, 0.04 and 0.06 resulted in similar planktonic and bacterial biofilm reduction. None of the instruments rendered root canals completely free of bacteria.