Análise comparativa e teste empírico da validade dos modelos CAPM tradicional e condicional: o caso das ações da Petrobrás

ALVES, Janaína da Silva. Análise comparativa e teste empírico da validade dos modelos CAPM tradicional e condicional: o caso das ações da Petrobrás. Revista Ciências Administrativas, Fotaleza, v. 13, n. 1, p.147-157, ago. 2007.

Análise comparativa entre as propriedades do gesso obtido de rejeito da produção de sal e gesso comerciais

The environmental impacts, caused by the solid residues generation, are an often quoted concern nowadays. Some of these residues, which are originated from different human activities, can be fully reused, reducing the effects of the poor waste management on the environment. During the salt production process, the first formed crystals are discarded as industrial waste. This is mainly made of gypsum that is a calcium sulfate dihydrate (CaSO4.2H2O). The gypsum in question may go through a calcination process due to the plaster (CaSO4.0,5H2O) production and then the application on the cement industry. Considering the necessity of development and application for these industrial wastes, this paper aims to analyze the plaster, called Salgesso, from the gypsum that was generated during the salt production, and its use viability on the civil construction industry in order to create environmental and economical benefits. For characterization, the following experiments were performed: X-ray Fluorescence (XRF), X-ray Diffraction (XRD), thermal analysis (TG/DTG) and Scanning Electron Microscopy (SEM) with EDS. The following tests were also performed to obtain the mechanical characteristics: Thinness Modulus, Unit Mass, Setting Time and Compressive Resistance. Three commercial plasters used on civil construction were taken as references. All of these tests were performed according to the current standards. It was noticed that although there were some conflicting findings between the salt and commercial plasters in all of the studied properties, the Salgesso has its values within the standard limits. However, there is the possibility to improve them by doing a more effective calcination process. Three commercial plasters, used in construction, were used as reference material. All tests were performed according to standards in force. It was observed that although some tests present conflicting findings between the salt and gypsum plasters commercial properties in all of the studied Salgesso have values within the limits imposed by the standard, but can be improved simply by calcination process more effective

Análise comparativa entre simuladores de linha de fluxo e diferenças finitas para um reservatório de petróleo submetido a injeção de água

Water injection is the most widely used method for supplementary recovery in many oil fields due to various reasons, like the fact that water is an effective displacing agent of low viscosity oils, the water injection projects are relatively simple to establish and the water availability at a relatively low cost. For design of water injection projects is necessary to do reservoir studies in order to define the various parameters needed to increase the effectiveness of the method. For this kind of study can be used several mathematical models classified into two general categories: analytical or numerical. The present work aims to do a comparative analysis between the results presented by flow lines simulator and conventional finite differences simulator; both types of simulators are based on numerical methods designed to model light oil reservoirs subjected to water injection. Therefore, it was defined two reservoir models: the first one was a heterogeneous model whose petrophysical properties vary along the reservoir and the other one was created using average petrophysical properties obtained from the first model. Comparisons were done considering that the results of these two models were always in the same operational conditions. Then some rock and fluid parameters have been changed in both models and again the results were compared. From the factorial design, that was done to study the sensitivity analysis of reservoir parameters, a few cases were chosen to study the role of water injection rate and the vertical position of wells perforations in production forecast. It was observed that the results from the two simulators are quite similar in most of the cases; differences were found only in those cases where there was an increase in gas solubility ratio of the model. Thus, it was concluded that in flow simulation of reservoirs analogous of those now studied, mainly when the gas solubility ratio is low, the conventional finite differences simulator may be replaced by flow lines simulator the production forecast is compatible but the computational processing time is lower.

ANÁLISE COMPARATIVA DO CONHECIMENTO, ATITUDES E PRECONCEITOS DE UNIVERSITÁRIOS DOS CURSOS DE PEDAGOGIA, EDUCAÇÃO FÍSICA E MEDICINA EM RELAÇÃO À EPILEPSIA

Epilepsy is a chronic disorder of the central nervous system, most frequently characterized by abnormal electrical impulses in the brain. It is the oldest recorded neurological disease and has been surrounded by myths, mistaken beliefs and preconceptions. Three professionals work with epileptic patients on a daily basis: teachers, physical educators and physicians . This study aimed to analyze and compare the level of knowledge, preconceptions and attitudes of undergraduate students in the courses of Pedagogy, Physical Education and Medicine, future professionals who will deal with epileptic patients. This descriptive observational study was conducted with 286 university undergraduates of both sexes (women 99/34.6% and men 187/65.4%) from the first to fourth year of Pedagogy, Physical Education and Medicine courses at the Universidade Estadual Rio Grande do Norte (UERN), with mean age of 23 years. A validated and adapted 17-question questionnaire, divided into nine knowledge-based questions, five related to preconceptions and three on attitudes, was applied. Results allowed elaboration of a manuscript entitled Comparative Analysis of Knowledge, Attitude and Preconceptions in University Undergraduates of Pedagogy, Physical Education and Medicine Courses in Relation to Epilepsy. The findings of this article show that knowledge of epilepsy in the three groups is very satisfactory. The low level of preconception indicates that educational or clarifying information is being transmitted, albeit by television, a layman s information vehicle, which has undoubtedly contributed to reducing the stigma of epilepsy through educational information. Results also suggest a lack of knowledge on how to act during a seizure, especially in education professionals. Although there are limitations in our sample, the relevance and contribution of this study is to call attention to the importance and need for these future professionals to be informed and learn correct attitudes with respect to epilepsy during their academic formation. This is essential at a time when the disease is being brought out of the shadows. This research was supported by the Office of the Dean of Teaching, and Deans of Pedagogy, Physical Education and Medicine at UERN. The research was made possible by the multidisciplinary interaction among a physical educator, child neurologist and statistician, all contributing to achieving the aims set out here

Sobre a constituição do sujeito: uma análise comparativa entre a psicologia sócio-sociologia do conhecimento de berger e luckmann

This study investigated how the process of the constitution of the subject is interpreted in the formulations of the founders of socio-historical psychology (Lev S. Vigotski, Alexei N. Leontiev and Alexander R. Luria) and in the sociology of knowledge of Peter Berger and Thomas Luckmann. These two theoretical perspectives, despite having different philosophical formulations as ontological and epistemological intentions (socio-historical psychology, historical dialectical materialism; the sociology of Berger and Luckmann and phenomenology) arrive, however, at the same basic conclusion about the social nature of the subject. The objective of the study, therefore, was that of identifying the differences and convergences between the two perspectives and then, try to determine the possibility of a theoretical synthesis between them in relation to the constitution of the subject. At the same time, we intended to analyse the implications of this possible synthesis in order to comprehend the manner in which the ideology functions in human societies as thought by Louis Althusser and Alípio de Sousa Filho. We arrived at the conclusion that, despite being incompatible from the ontological and epistemological points of view, a synthesis is possible between socio-historical psychology and the sociology of knowledge of Berger and Luckmann in relation to the conception of society and the comprehension of the process of the constitution of the subject. Starting from the philosophical intentions of socio-historical psychology, it is possible to incorporate, enriching points such as: Berger s and Luckmann sconception of society and the interpretation of the process of constitution of the subject. This possible synthesis, when interpreted in light of the reflections of Althusser and Sousa Filho on the phenomenon of ideology in human societies, is constituted in a real unveiling of the concrete provisos by which the ideology acts in human societies in order to transform biological examples of the human species in specific social subjects

A elasticidade da pobreza em relação ao crescimento e à desigualdade de renda no nordeste rural brasileiro de 1995 a 2009: uma análise comparativa

This work aims to analyze how the growth in average income and the change in inequality in income distribution have impacted rural poverty in the Northeast in the period 1995 to 2009. Under the approach in Kakwani (1993) e Duclos and Araar (2006), and under the assumption of log-normality of income per capita, exposed in Bourguignon (2002) and Hoffmann (2005), are calculated growth and inequality elasticities of poverty to FGT poverty measures in order to observe the behavior of the sensitivity of poverty to changes in average household income and the change in income distribution / Gini index. Concurrently, decomposes the changes in measures of poverty (proportion of poor) between growth and distribution components (first proposed by Datt and Ravallion, 1992) to assess the effect of weight change and the effect of income inequality change change on poverty. Regarding the estimation of elasticities of poverty and growth and inequality elasticities of the two methodologies used in this work - under the assumption of lognormal distribution of income and FGT measures under the by Kakwani (1993) andDuclos e Araar (2006) - though do not result in identical values, to corroborate same results, ie the long-term decline in rural poverty from 1995 to 2009 the Northeast and the greater sensitivity of the Northeast Rural Poverty, observed in this same period, income growth and change in inequality. The weight of growth and change in inequality in changing the Northeast rural poverty identified that most of the decline in rural poverty is linked to growth in average income. This result coincides with results found by Kraay (2005) for a group of countries

Gestão estratégica no terceiro setor: uma análise comparativa da construção de mapas estratégicos de organizações sem fins lucrativos

The strategy has an important role in organizations by identifying factors that need to be emphasized to organizational success and strategic map currently contemplates as a preview of organizational strategy, prepared from your planning. Third sector organizations need to take a competitive posture, establishing a sustainable position and maximizing the use of resources towards their social or humanitarian goals. This research aims to investigate the process of building strategic maps of two non-profit organizations by identifying and characterizing the steps common to these organizations. The research is characterized as qualitative descriptive and applied knowledge. Developed from bibliographical reviews and participant observation gathered in a case study, the data was collected in two third sector organizations and the results show that how to conduct the process may influence directly on your result lists. Among the steps identified, emphasis can be given to the formation of a team, the definition of strategy, the definition of strategic objectives, the gathering of those goals into perspective and the identification of the cause-effect relationship that relate. Marked as optional, but effective, conducting an event outside the premises of the company to complete the process, or any portion thereof. However, stands out as essential the active participation of senior management in the process, as a way to give credit to the initiative. These steps, its characteristics and its factors are described from comparisons between the processes adopted by the organizations surveyed

Análise comparativa de modelos de maturidade em gerenciamento de projetos: uma contribuição ao estudo da maturidade organizacional em setores de engenharia

The purpose of this dissertation is to formulate guidelines for the improvement of maturity models, or the development of new ones, aiming at its application to project departments. The maturity of project management has become critical for organizations that develop projects and want to stand out in the market they serve. For this purpose, maturity models provide paths in order to guarantee that the institutionalization of project management is achieved in the best possible way. Generally, these models assess the organization, define its current situation in managing projects and propose steps to be performed in the search of more advanced levels of maturity. With the objective of contributing to the improvement of maturity models for specific cases, a bibliographical research was conducted for the preparation of a comparative analysis matrix and performed a case study for application of two maturity models (MMGP and PMMM levels 2 and 3), selected based on criteria found in the literature, in an engineering department of an oil company. The case study supported the realization of a comparative analysis of models, from which guidelines were formulated for improvement. The results showed that thedepartment is evaluated in a medium stage of maturity, recording significant progress in some dimensions assessed. They also found that the results of applying the two models are presented as complementary, although the model is highlighted by the greater depth of MMGP diagnostic, considering many variables in their levels of maturity than model PMMM (levels 2 and 3).Finally, directions have been formulated that contribute to the improvement of maturity models, taking in account the organizational environment in which this work was developed

Análise comparativa dos métodos de fatores ponderados na seleção de áreas para aterros sanitários

This study presents a comparative analysis of methodologies about weighted factors considered in the selection of areas for deployment of Sanitary Landfills, applying the methodologies of classification criteria with scoring bands Gomes, Coelho, Erba & Veronez (2000); Waquil et al, 2000. That means, we have the Scoring System used by Union of Municipalities of Bahia and the Quality Index Landfill Waste (IQR) which are applyed for this study in Massaranduba Sanitary Landfill located in the municipality of Ceará Mirim /RN, northeastern of Brazil. The study was conducted in order to classify the methodologies and to give support for future studies on environmental management segment, with main goal to propose suited methodologies which allow safety and rigor during the selection, deployment and management of sanitary landfill, in the Brazilian municipalities, in order to help them in the process to extinction of their dumps, in according of Brazilian Nacional Plan of Solid Waste. During this investigation we have studied the characteristics of the site as morphological, hydrogeological, environmental and socio-economic to permit the installation. We consider important to mention the need of deployment from Rio Grande do Norte State Secretary of Environment and Water (SEMARH), Institute of Sustainable Development and Environment of RN (IDEMA), as well, from Federal and Municipal Governments a public policies for the integrated management of urban solid waste that address environmental preservation and improvement of health conditions of the population of the Rio Grande do Norte

Análise comparativa do desempenho de um Controlador Fuzzy acoplado a um PID Neural sintonizado por um Algoritmo Genético com Controladores Inteligentes Convencionais

On this paper, it is made a comparative analysis among a controller fuzzy coupled to a PID neural adjusted by an AGwith several traditional control techniques, all of them applied in a system of tanks (I model of 2nd order non lineal). With the objective of making possible the techniques involved in the comparative analysis and to validate the control to be compared, simulations were accomplished of some control techniques (conventional PID adjusted by GA, Neural PID (PIDN) adjusted by GA, Fuzzy PI, two Fuzzy attached to a PID Neural adjusted by GA and Fuzzy MISO (3 inputs) attached to a PIDN adjusted by GA) to have some comparative effects with the considered controller. After doing, all the tests, some control structures were elected from all the tested techniques on the simulating stage (conventional PID adjusted by GA, Fuzzy PI, two Fuzzy attached to a PIDN adjusted by GA and Fuzzy MISO (3 inputs) attached to a PIDN adjusted by GA), to be implemented at the real system of tanks. These two kinds of operation, both the simulated and the real, were very important to achieve a solid basement in order to establish the comparisons and the possible validations show by the results

Análise comparativa entre propriedades mecânicas, termofísicas e geométricas de tijolos produzidos pelos fornos caieira e abóbada

In the State of Rio Grande do Norte potteries are distributed in several counties in the four meso, which are: West Potiguar, Center Potiguar, Agreste Potiguar and East Portiguar. The ceramics, mostly, are responsible for products used in construction as bricks, tiles and white brick and wood used as fuel. This paper had a primary focus in the region of Seridó. The furnaces in this region, used to manufacture bricks are configured Caieira and Valt, in most of them using principles rustic, usually operated in an empirical way, using principles of control rather primitive, predominantly visual control. The focus of this study was to analyze the differences in the thermophysical, mechanical and geometric characteristics of bricks produced by Caieira and vault furnaces, using the NBR 15720 and the evaluation of energy efficiency in both furnaces. Thermophysical characteristics were analyzed through tests to determine the water absorption obtained from the difference between dry mass and wet mass of the sample and analysis of the thermal gradient, the mechanical characteristics from determination of the compressive strength of ceramic brick popularly known as bricks and also analyzed the geometrical characteristics of the bricks in order to verify the homogeneity of manufacturing. The tests showed that the energy difference of the two furnaces is not considered responsible for a significant difference in the properties of the products

Análise comparativa de traduções do Cântico dos Cânticos

Observam-se especialmente as divergências entre as duas, no que diz respeito ao erotismo presente no poema, e analisando as suas prováveis razões discursivas. Não se visa aqui a produção de uma nova tradução, mas a comparação e o comentário das escolhas tradutórias em determinados excertos das obras selecionadas. A argumentação desenvolvese através dos seguintes encaminhamentos: após a apresentação do objeto de estudo com o debate que sempre o acompanha acerca das polêmicas de datação e autoria, passa-se à exposição do problema do qual se ocupa a hipótese, assim como os objetivos e os parâmetros metodológicos que regeram a elaboração desta dissertação. Consecutivamente, elencam-se os pressupostos teóricos que emolduram as análises propostas, aborda-se também a sexualidade segundo a religião contemporânea (por se tratar de um livro ao qual se agregou valor religioso) nas instituições que adotaram o Cântico dos Cânticos, a saber: o judaísmo e o cristianismo católico e protestante, assim como o processo possivelmente efetuado durante essa adoção quanto ao enviesamento interpretativo e à atribuição autoral: visa-se compreender as razões da incongruência causada pelo sexo que permeia o texto em questão relativamente à religiosidade contemporânea, e especula-se sobre a sua canonização, considerando como esse desencaixe pode ter mudado o curso da sua exegese tradicional para a alegoria que se tornou a sua leitura majoritária, inclusive engendrando a atribuição tradicional da sua suposta origem. Somente então se dá início à análise comparativa das duas traduções, a fim de se constatar a provável existência dum viés discursivo transparecente das formas como cada uma destas obras verteu as porções do texto-fonte, para o português, que continham marcas de erotismo, observando se respeitaram ou não as leituras tradicionais que insuflaram no texto o seu pendor alegórico de caráter religioso

A perfeição da justiça em Platão uma análise comparativa entre a alegoria da linha dividida e os personagens d A República

The allegory of the divided line presents one structure that divides itself into four levels of reality. Two of them move in the world of appearances or opinion, and the others into the world of being or intelligibility: eikasia and pistis, and dianoia and noesis. The difficulty is the following: if there are four levels of reality each with their respective objects that are apprehended according to a type of knowledge involved, is there an interpretation of the justice according to each level? Accordingly, our intention, after presenting the types of knowledge in the allegory of the divided line, is to demonstrate how the justice is comprehended at each level of reality. We understand that Plato uses the characters to represent levels involving different types of knowledge. The characters are Cephalus, Polemarchus, Thrasymachus, Glaucon, Adimantus and Socrates, and the comprehension about what is the justice at each level follows what these characters understand justice to be

Análise comparativa dos genes de reparo do DNA em Gluconacetobacter diazotrophicus e Gluconobacter oxydans

Gluconacetobacter diazotrophicus é uma alfa-proteobactéria Gram-negativa, tolerante a meios ácidos, fixadora de nitrogênio atmosférico e foi a primeira bactéria diazotrófica endofítica isolada da cana-de-açúcar. Por sua vez, Gluconobacter oxydans, também alfa-proteobactéria Gram-negativa, possui a capacidade de oxidar incompletamente alcoóis e carboidratos. Ambas de interesse biotecnológico e industrial, essas bactérias tiveram seus genomas seqüenciados completamente em 2007. Desta forma, foi de interesse desse trabalho analisar e comparar os genes de reparo do DNA devido sua importância na manutenção da integridade genômica. Sendo assim, as vias de reparo presentes nos dois organismos foram identificadas, utilizando como base uma terceira alfa-proteobactéria, a Caulobacter crescentus, cujos genes de reparo foram descritos por um trabalho anterior e também os genes bem estabelecidos para o reparo do DNA em Escherichia coli. Para esse estudo, um banco de dados contendo ortólogos para os genes de reparo de DNA encontrados nos organismos foi criado e análises comparativas por similaridade usando o pacote Blast e o software Clustal foram feitas. Este estudo demonstrou que as principais vias de reparo ao DNA reparos por excisão, reparo direto, reparo recombinacional e reparo pelo sistema SOS estão presentes nos organismos analisados, demonstrando, na maioria das vezes, boa similaridade com E. coli. Interessantemente, foram encontradas duplicações gênicas nos quais uma das cópias estava presente no cromossomo e a outra, no plasmídeo, como no caso de UvrD, DnaE e Ssb, possivelmente caracterizando eventos de transferência lateral. Por fim, uma grande novidade foi a identificação de ortólogos para RecB em G. diazotrophicus e G. oxydans e de ortólogos duplicados de RecD em G. diazotrophicus. Até o momento, não havia sido relatada a presença de membros da via de iniciação RecBCD do reparo recombinacional em alfaproteobactérias

Cargos comissionados da administração pública direta do Rio Grande do Norte: análise comparativa entre o perfil profissional dos cargos comissionados com vínculo funcional e sem vínculo funcional

The professional profile of public administrators in Brazil is changing very rapidly in recent years, seeking to meet the principle of efficiency by public agencies at all levels. The admission of the permanent government employee under the Public Administration is by competition, however, commissioned positions are free appointment of managers, which allows effective participation of external experts according to their respective standards and norms. In this context, this dissertation seeks to understand the main characteristics of the profile of the occupants of commissioned positions in Direct Public Administration of the State of Rio Grande do Norte, noting the differences between those with functional link with the have nots. For this study, by data collection and content analysis, a mapping of the administrative structure of the Government of the State of Rio Grande do Norte was done, i.e., the organization of the Executive Branch, which is regulated by the Complementary Law no. 163/1999 and its amendments, which consists of 53 (fifty three) entities, these 29 (twenty nine) are agencies of the direct administration and the remaining 24 (twenty four) comprises the indirect administration. With the collected data, analysis on the number of commissioned positions of each organ of the State of Rio Grande do Norte and information on education, age, length of service, gender and functional link with the direct administration was carried out. Data were available from SEARH in June/2013, when they totaled 58,733 (fifty-eight thousand seven hundred thirty-three) servers, these 2.15% (two point fifteen percent) occupy commissioned positions, corresponding to 1,262 commissioned positions under the Direct Administration, below the national average of 4% (four percent). Of total commissioned positions 64.7% (sixty-four point seven percent) have no functional link with the direct administration, while only 35.3% (thirty -five point three percent) have functional link. It was noticed that there are no clear and specific criteria for the appointments of commissioned positions in the State. They occur freely, as provided in the State Constitution. Another conclusion is the importance of Public Administration define and improve their capacity, competence and efficiency in the delivery of public services. For that it is necessary to invest in their workforce composed of permanent employees and commissioned positions to define the appropriate professional profile