The non-destructive tests are an important tool in the evaluation of concrete properties both during and after finishing the execution of structures. In this type of evaluation, correlation curves can be used to the indirect determination of these properties. However, these correlations should be specific to the materials and application conditions under analysis. This study sought to obtain correlation curves ...
La recherche développée dans cette thèse a comme thème la femme en tant que témoin d’une communauté orale dans son rôle de chanteuse et auteure de cordel. L’objectif, d’une façon générale, est de construire aussi bien l’historiographie de ces femmes qui avaient jusqu’alors peu de visibilité dans ce domaine, que celle de la cantoria. Pour construire une nouvelle cartographie du folheto de cordel et un relevé des...
The state of Paraiba is one of the largest producers of bentonite, which is intended to various technological uses, among which, as thixotropic agent of oil well drilling fluids. However, these are sensitive to the presence of contaminants, give origin to fluids that do not meet Petrobras' specification EP-1EP-00011-A. Thus, the separation of coarser fractions of finer fractions by a hydrocyclone enables obtain...
Dissimilar welded joints have been used extensively in the petroleum industry for some time. In the last decade, failures, many of them of catastrophic proportions, began to appear in the exploration and transportation of offshore oil, such as those that occurred in the Gulf of Mexico and in the North Sea. This fact has generated great concern in the oil sector, which is currently one of the main users of this ...
The automation of productive processes, present in industries with high uniformity in the production of goods or services, is characterized by the low flexibility of the production system and the high interdependence between the processes and the products generated. Although this automation suggests a decrease in the relevance of the workers role within the production system, there are several unexpected situat...
This dissertation encompasses three chapters that study Economic Forecasting Models. Below are the abstracts for each chapter. Chapter 1: Measuring Macroeconomic Uncertainty to Brazil ThechapterproposesestimatingamacroeconomicmeasureofuncertaintytoBrazil. The indexwasconstructedbasedonthemethodologyofJurado(2015)usedtobuildthesame index for the US economy. We show that an increase in the uncertainty level leads...
This dissertation aims to study the behavior of the preferences parameters of the Central Bank of Brazil (BCB), in the period between 2000.T1 and 2017.T4. To accomplish this purpose, we assume that Brazil’s monetary policy is defined in an optimized way, then we obtain the parameters of the political function from the estimation of the macroeconomic model with expectations backward-looking and the preferences of...
Based on Catering Theory, this thesis aimed to analyze the effect of the companies’ investment horizon in corporate decisions taken in line with the investor sentiment. The Catering Theory establishes the ability of managers to identify the mispricing occurrence in the stock market, causing decision-making to maintain the difference between the stock price and its fundamental value for the benefit of investors ...
The overconfidence of managers, leaders and entrepreneurs comprises a bias that may constitute a possible threat to business strategy, since it can influence the decision-making process, underestimating the risks involved in making decisions. The objective of the present study was to analyze the influence of the overconfidence of managers of brazilian companies in the business strategy. Six strategic dimensions...
Under the present situation of corruption scandals witnessed by the population and the increasing dissatisfaction with the performance of managers and the waste of public resources by the public administration, the citizens have increasingly demanded the responsibility of the government through demands for more transparency of the management acts of government agents. For this social control to be practiced, th...