Previsão de demanda de veículos automotores através do modelo de regressão linear múltipla

This study aimed to model a equation for the demand of automobiles and light commercial vehicles, based on the data from February 2007 to July 2014, through a multiple regression analysis. The literature review consists of an information collection of the history of automotive industry, and it has contributed to the understanding of the current crisis that affects this market, which consequence was a large reduction in sales. The model developed was evaluated by a residual analysis and also was used an adhesion test - F test - with a significance level of 5%. In addition, a coefficient of determination (R2) of 0.8159 was determined, indicating that 81.59% of the demand for automobiles and light commercial vehicles can be explained by the regression variables: interest rate, unemployment rate, broad consumer price index (CPI), gross domestic product (GDP) and tax on industrialized products (IPI). Finally, other ten samples, from August 2014 to May 2015, were tested in the model in order to validate its forecasting quality. Finally, a Monte Carlo Simulation was run in order to obtain a distribution of probabilities of future demands. It was observed that the actual demand in the period after the sample was in the range that was most likely to occur, and that the GDP and the CPI are the variable that have the greatest influence on the developed model

Certificações ambientais para construções civis

Over the recent human history within the last centuries the environmental degradation has been accumulating and growing rampantly causing effects today easily perceived by all. Because of this, today we can say that there is almost a consensus among the world population's concern with the environment in order to seek to minimize these effects immediately in addition to not aggravate the situation for future generations. Thus today it is common to find a wide range of products with this ideal of sustainable commitment in the various commercial areas. The construction industry has a responsibility to be a major cause of these impacts to the environment, so it is also one of the main vectors able to mitigate the degradation of the environment. In order to encourage, oversee and promote the sustainable attitudes within the construction area emerged environmental certifications. In this work it's exposed some of the major certifications for civilian buildings, highlighting the Selo Azul da Caixa that appears as a good choice focused on the Brazilian reality

Effect of feed restriction on body composition and metabolism of goats of different genders

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)