Avaliação de floculante natural à base de Moringa oleifera no tratamento de água produzida na indústria do petróleo: aplicação da técnica combinada floculação/flotação

The principal effluent in the oil industry is the produced water, which is commonly associated to the produced oil. It presents a pronounced volume of production and it can be reflected on the environment and society, if its discharge is unappropriated. Therefore, it is indispensable a valuable careful to establish and maintain its management. The traditional treatment of produced water, usualy includes both tecniques, flocculation and flotation. At flocculation processes, there are traditional floculant agents that aren’t well specified by tecnichal information tables and still expensive. As for the flotation process, it’s the step in which is possible to separate the suspended particles in the effluent. The dissolved air flotation (DAF) is a technique that has been consolidating economically and environmentally, presenting great reliability when compared with other processes. The DAF is presented as a process widely used in various fields of water and wastewater treatment around the globe. In this regard, this study was aimed to evaluate the potential of an alternative natural flocculant agent based on Moringa oleifera to reduce the amount of oil and grease (TOG) in produced water from the oil industry by the method of flocculation/DAF. the natural flocculant agent was evaluated by its efficacy, as well as its efficiency when compared with two commercial flocculant agents normally used by the petroleum industry. The experiments were conducted following an experimental design and the overall efficiencies for all flocculants were treated through statistical calculation based on the use of STATISTICA software version 10.0. Therefore, contour surfaces were obtained from the experimental design and were interpreted in terms of the response variable removal efficiency TOG (total oil and greases). The plan still allowed to obtain mathematical models for calculating the response variable in the studied conditions. Commercial flocculants showed similar behavior, with an average overall efficiency of 90% for oil removal, however it is the economical analysis the decisive factor to choose one of these flocculant agents to the process. The natural alternative flocculant agent based on Moringa oleifera showed lower separation efficiency than those of commercials one (average 70%), on the other hand this flocculant causes less environmental impacts and it´s less expensive

Da voz que cala ao corpo que fala: o assédio moral no ambiente de trabalho como desafio para o serviço social

The changes ocurred in the world of capitalist labor, especially from the last decades of the 20th century, accentuated the process of manipulation and domination of the working class, materialized mainly through naturalization and / or trivialization of violence, conducted in the work environment. From this process, emerge the elements of bullying, that is, the embarrassing and humiliating practices which extend through time, degrading human race, and becoming fruitful object for study, debate and the intervention of the professionals of the Social Service area. Thus, we assume the perspective of analyzing the concepts and the work of social workers, whom work at people management area before the bullying in the workplace. We propose the following objectives: apprehend the settings of bullying, in the contemporary context of competitiveness and flexibility of work, as well as its implications for workers' health; characterize the background of this expression of violence at work in the municipality of Natal- RN; and analyze the powers and duties of the social worker in the process of prevention, identification and addressing of bullying in the context of work. This study consisted of a qualitative approach, based on the dialectical-critical method as soon as we adopt methodological procedures such as: theoretical knowledge, documental and field research, and performed using semi-structured interviews. The subjects of this research were nine (09) the Social Service professionals working in personnel management area, in five (5) institutions with legal and branches of different activities, located in Natal-RN. Even interviewed one (01) representative of the Public Ministry of Rio Grande do Norte Office (MPT-RN). The findings of this analysis indicate that bullying is a contemporary expression of "social question", which is presented as a demand for the Social-assistants – covered up and / or camuflage – under the guise of problems related to workers' health or mere conflicts of interpersonal relationships, that is, without any causal connection with the organization of work. The fear of losing job, not to be inserted in the labor market, and / or suffering reprisals, deepens the subject levels of the victims of bullying. Hence the importance of Social Workers are capable to understand the social reality, by preventing and combating the elements of bullying.

Modelagem matemática e experimental da perda de injetividade em poços canhoneados

Water injection in oil reservoirs is a recovery technique widely used for oil recovery. However, the injected water contains suspended particles that can be trapped, causing formation damage and injectivity decline. In such cases, it is necessary to stimulate the damaged formation looking forward to restore the injectivity of the injection wells. Injectivity decline causes a major negative impact to the economy of oil production, which is why, it is important to foresee the injectivity behavior for a good waterflooding management project. Mathematical models for injectivity losses allow studying the effect of the injected water quality, also the well and formation characteristics. Therefore, a mathematical model of injectivity losses for perforated injection wells was developed. The scientific novelty of this work relates to the modeling and prediction of injectivity decline in perforated injection wells, considering deep filtration and the formation of external cake in spheroidal perforations. The classic modeling for deep filtration was rewritten using spheroidal coordinates. The solution to the concentration of suspended particles was obtained analytically and the concentration of the retained particles, which cause formation damage, was solved numerically. The acquisition of the solution to impedance assumed a constant injection rate and the modified Darcy´s Law, defined as being the inverse of the normalized injectivity by the inverse of the initial injectivity. Finally, classic linear flow injectivity tests were performed within Berea sandstone samples, and within perforated samples. The parameters of the model, filtration and formation damage coefficients, obtained from the data, were used to verify the proposed modeling. The simulations showed a good fit to the experimental data, it was observed that the ratio between the particle size and pore has a large influence on the behavior of injectivity decline.

Avaliação da incerteza de medição no Setor Médico-hospitalar

This study aims to evaluate the uncertainty associated with measurements made by aneroid sphygmomanometer, neonatal electronic balance and electrocautery. Therefore, were performing repeatability tests on all devices for the subsequent execution of normality tests using Shapiro-Wilk; identification of influencing factors that affect the measurement result of each measurement; proposition of mathematical models to calculate the measurement uncertainty associated with measuring evaluated for all equipament and calibration for neonatal electronic balance; evaluation of the measurement uncertainty; and development of a computer program in Java language to systematize the calibration uncertainty of estimates and measurement uncertainty. It was proposed and carried out 23 factorial design for aneroid sphygmomanometer order to investigate the effect of temperature factors, patient and operator and another 32 planning for electrocautery, where it investigated the effects of temperature factors and output electrical power. The expanded uncertainty associated with the measurement of blood pressure significantly reduced the extent of the patient classification tracks. In turn, the expanded uncertainty associated with the mass measurement with neonatal balance indicated a variation of about 1% in the dosage of medication to neonates. Analysis of variance (ANOVA) and the Turkey test indicated significant and indirectly proportional effects of temperature factor in cutting power values and clotting indicated by electrocautery and no significant effect of factors investigated for aneroid sphygmomanometer.

O estado como empregador de última instância: uma proposta de pleno emprego, estabilidade e condições dignas de trabalho para o Brasil

GOMES, Z. B. ; LOURENÇO, André Luís Cabral de . Atuação do Estado como empregador de última Instância: uma proposta para eliminar o desemprego estrutural do Brasil. In: Encontro Nacional de Economia Política, 13. 2008, João Pessoa/PB. Anais... João Pessoa: ENEP, 2008.

Os “Novos Mundos da Inserção” dos/as Diplomados/as do ISMT: precariedade e individualização nas transições atuais para o mundo do trabalho

O estudo pretende compreender o modo como os jovens diplomados do Instituto Superior Miguel Torga (ISMT) percecionam e como constroem os “novos mundos da inserção” face à precariedade, individualização e incertezas das transições atuais do ensino para o mundo do trabalho. Esta é a pergunta de pesquisa que guiou esta dissertação de mestrado. Entende-se a inserção profissional de diplomados como historicamente inscrita numa conjuntura económica e política (fim do emprego para a vida, incerteza, flexibilidade), dependente de mecanismos institucionais que articulam educação, trabalho e remuneração; e que é dependente de estratégias de atores determinadas por recursos estratégicos e por expetativas e trajetórias biográficas. Optou-se por um estudo de desenho qualitativo, através da realização de 10 entrevistas semiestruturadas, já que interessava ouvir diretamente os discursos dos jovens diplomados e explorar com eles os diversos significados e perceções que têm do fenómeno em estudo, mais concretamente, as trajetórias de inserção profissional na atualidade. Concluiu-se uma individualização e privatização do risco ou a assunção de si como ator estratégico da inserção profissional, acomodação à incerteza e precariedade como modo de vida, uma desresponsabilização das entidades empregadoras e um mimetismo da retórica que coloca no desfasamento entre oferta de cursos e necessidades do mercado de trabalho o ónus da responsabilidade.

Pontes para a (Des)inserção: inserção pelo trabalho no Concelho de Stª Mª da Feira

O presente relatório visa a obtenção do grau de Mestre em Serviço Social pelo Instituto Superior Miguel Torga. Motivada pela preocupação nascida na prática profissional quotidiana, no acompanhamento aos cidadãos beneficiários do Rendimento Social de Inserção (R.S.I.), procurámos compreender a relação entre a pobreza e o mercado de trabalho. Criado no ano de 1996 pela Lei nº 19-A/96 de 29 de Junho, como prestação de rendimento mínimo garantido, o R.S.I. tem introduzido formas cada vez mais apuradas de seleção das suas clientelas, quer através da redefinição do conceito de agregado e avaliação dos seus rendimentos, quer da contratualização da prestação, pelo reforço crescente das penalizações ao incumprimento relativo ao emprego e à formação. Objetivo geral é perceber como se efetiva o processo de colocação no mercado de trabalho e que oportunidades de (des)inserção social dai resultam para os beneficiários. Procurámos também analisar a configuração das propostas oferecidas, no âmbito do contrato de inserção, aos homens e às mulheres, aos “velhos” e “novos” pobres. Assim, foram efetuadas entrevistas exploratórias aos técnicos do Centro de Emprego e Formação Profissional Entre Douro e Vouga (CEFP-EDV); Gabinete de Inserção Profissional (GIP) e Núcleo Local de Inserção (NLI) de Stª Mª da Feira e aplicado um inquérito por questionário aos beneficiários do R.S.I. com Contrato de Inserção para colocação no mercado de trabalho. Os técnicos do CEFP-EDV e do GIP expressaram dificuldades no acompanhamento e gestão de carreira dos beneficiários, devido à sobrecarga e à natureza burocrática das tarefas exigidas nos seus organismos. Os beneficiários consideram igualmente que o CEFP-EDV não é eficiente nem eficaz, para a colocação no mercado de trabalho não cumprindo portanto a função que legalmente lhe está atribuída. Os homens são amplamente beneficiados na relação com o Centro de Emprego, comparativamente com as mulheres, porque recebem mais propostas de emprego e formação. A “velha pobreza” aparece instalada no desemprego e na prestação durante mais tempo que os “novos” pobres. Estes raramente são convocados pelo CEFP-EDV. São as redes informais que têm um papel mais ativo e preponderante no processo de inserção laboral. Na população inquirida a inserção pelo trabalho por si só não constituiu a solução para a saída da pobreza. / The present report aims to obtain a Master’s degree in Social Work from the Instituto Superior Miguel Torga. Motivated by concern aroused from the day to day professional practice, while monitoring citizens on social income benefits, “Rendimento Social de Inserção” (R.S.I.) (Social Insertion Income), we have sought to understand the relationship between poverty and the labour market. Introduced in the year 1996 by Law nº 19-A/96 of 29th June, as the provision of income support, the R.S.I. has introduced increasingly more refined forms of selection of its clientele, either by redefining the concept of aggregate and assessmento of their income, or the contractual provision, by increasingly strenthening the penalties for failure in relation to employment and training.The overall goal is to understand how the process of entering the work market is made and the opportunities of (un)inclusion arising from it for the beneficiaries. It was also sought to analyse the configuration of the proposals offered under the insertion contract to men and women, to the “old” and the “new” poor.Consequently, exploratory interviews were made to the technicians of Centro de Emprego e Formação Profissional Entre Douro e Vouga (CEFP-EDV) (Emloyment and Training Centre); Gabinete de Inserção Profissional (GIP) (Professional Insertion Office) and Núcleo Local de Inserção (Local Insertion Group) (NLI) of Stª Mª da Feira. The survey was carried out through a questionnaire to the beneficiaries of the R.S.I. with Insertion Contracts for placement in the labour market.The CEFP-EDV and GIP technicians expressed diffficulties in monitoring and career management of the benefeciaries due to overhead and bureaucratic nature of the tasks recquired in their institutions. The beneficiaries also considered that CEFP-EDV is neither efficient nor effective in placing people in the work market thus not fulfilling the function for which they are legally assigned. Men are largely benefitted in relation to the Job Centre, compared to women, because they get more job offers and training. The “old poverty” appears to be installed in unemployment and provision for longer than the “new” poor. These are rarely called up by CEFP-EDV. It is the informal networks that have a more active and leading role in the process of job placement. For the questioned population entering the job market does not itself constitute a solution to ending poverty.

Qualidade de vida no trabalho da Emater-RN: validação de um instrumento síntese de pesquisa e diagnóstico

The theoretical recital of the present study it is initiated of the evidence that the work occupies an important space in the man s life in way that the majority of the people works and passes great part of its time inside organizati ons. However, it is verified that the relation between man and work is becoming increasingly disagreement a time that the employees had started to complain work s routines, stress, not use all their potential and inadequate work s conditions. It can be observed by the way of Dejours (1994) studies. Thus, as contribution for the quality of work life s (QWL) studies the research developed here objectified to characterize the public employees quality of work life at EMATER -RN taking as reference an instrumen t of research synthesized from the typical academic literature of the subject. The synthesis of an ampler instrument is a necessity not taken care to the literature that treats on the subject but already perceived by some studies like Moraes et al (1990); Rodrigues (1989); Siqueira & Coleta (1989); Moraes et al (1992); Carvalho & Souza (2003); El -Aouar & Souza (2003) and Mourão, Kilimnick & Fernandes (2005); Adorno, Marques & Borges (2005) amongst others. These studies point out weak points of the existing models in the QWL s literature, as well as they recommend the elaboration of a model more flexible, that contemplates Brazilian cultural characteristics, and that contemplates the entire variable studied in the main existing models. For reach this objectiv e the adopted methodology was characterized as a case study with collected data in qualitative and quantitative way. Questionnaires and comments had been used as sources of evidences. These evidences had been tabulated through of statistical package SPSS ( Statistical Package for Social Science), in which the main technique of multivariate analysis used were the factorial analysis. As for the gotten results, it was verified the grouping of the quality of work life s indicators in 11 factors which are: Work s execution, Individual accomplishment, Work s equity, Relation individual and organization, Work s organization, Adequacy of the remuneration, Relation between head and subordinate, Effectiveness of the communication and the learning, Relation between work and personal life, Participation and Effectiveness of the work processes. Whatever to the characterization of the EMATER -RN s quality of work life it was clearly that to the measure that the satisfaction s evaluation with the QWL in the organization walks to intrinsic factors for extrinsic factors this level of satisfaction goes diminishing what points to the importance to improve these extrinsic factors in the institution. In summary it is possible to conclude that the organization studied has offered a significant set of referring variable to the quality of work life of the individual

Previsão do índice bovespa por meio de redes neurais artificiais: uma análise comparada aos métodos tradicionais de séries de tempo

Forecast is the basis for making strategic, tactical and operational business decisions. In financial economics, several techniques have been used to predict the behavior of assets over the past decades.Thus, there are several methods to assist in the task of time series forecasting, however, conventional modeling techniques such as statistical models and those based on theoretical mathematical models have produced unsatisfactory predictions, increasing the number of studies in more advanced methods of prediction. Among these, the Artificial Neural Networks (ANN) are a relatively new and promising method for predicting business that shows a technique that has caused much interest in the financial environment and has been used successfully in a wide variety of financial modeling systems applications, in many cases proving its superiority over the statistical models ARIMA-GARCH. In this context, this study aimed to examine whether the ANNs are a more appropriate method for predicting the behavior of Indices in Capital Markets than the traditional methods of time series analysis. For this purpose we developed an quantitative study, from financial economic indices, and developed two models of RNA-type feedfoward supervised learning, whose structures consisted of 20 data in the input layer, 90 neurons in one hidden layer and one given as the output layer (Ibovespa). These models used backpropagation, an input activation function based on the tangent sigmoid and a linear output function. Since the aim of analyzing the adherence of the Method of Artificial Neural Networks to carry out predictions of the Ibovespa, we chose to perform this analysis by comparing results between this and Time Series Predictive Model GARCH, developing a GARCH model (1.1).Once applied both methods (ANN and GARCH) we conducted the results' analysis by comparing the results of the forecast with the historical data and by studying the forecast errors by the MSE, RMSE, MAE, Standard Deviation, the Theil's U and forecasting encompassing tests. It was found that the models developed by means of ANNs had lower MSE, RMSE and MAE than the GARCH (1,1) model and Theil U test indicated that the three models have smaller errors than those of a naïve forecast. Although the ANN based on returns have lower precision indicator values than those of ANN based on prices, the forecast encompassing test rejected the hypothesis that this model is better than that, indicating that the ANN models have a similar level of accuracy . It was concluded that for the data series studied the ANN models show a more appropriate Ibovespa forecasting than the traditional models of time series, represented by the GARCH model

Navegação de robô móvel em ambiente com humanos

Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Mecânica

FOR-TSM: desarrollo de una herramienta de pronósticos con modelos de series de tiempo

Uno de los temas más complejos y necesarios en los cursos de Administración de Operaciones, es el uso de los pronósticos con modelos de series de tiempo (TSM por sus siglas en inglés) -- Para facilitar el entendimiento y ayudar a los estudiantes a comprender fácilmente los pronósticos de demanda, este proyecto presenta FOR TSM, una herramienta desarrollada en MS Excel VBA® -- La herramienta fue diseñada con una Interfaz gráfica de Usuario (GUI por sus siglas en inglés) para explicar conceptos fundamentales como la selección de los parámetros, los valores de inicialización, cálculo y análisis de medidas de desempeño y finalmente la selección de modelos

Análise da fluência em vigas de concreto armado simplesmente apoiadas usando o método dos elementos finitos

Reinforced concrete creep is a phenomenon of great importance. Despite being appointed as the main cause of several pathologies, its effects are yet considered in a simplified way by the structural designers. In addition to studying the phenomenon in reinforced concrete structures and its current account used in the structural analysis, this paper compares creep strains at simply supported reinforced concrete beams in analytical and in experimental forms with the finite element method (FEM) simulation results. The strains and deflections obtained through the analytical form were calculated with the Brazilian code NBR 6118 (2014) recommendations and the simplified method from CEB-FIP 90 and the experimental results were extracted from tests available in the literature. Finite element simulations are performed using ANSYS Workbench software, using its 3D SOLID 186 elements and the structure symmetry. Analyzes of convergence using 2D PLANE 183 elements are held as well. At the end, it is concluded that FEM analyses are quantitative and qualitative efficient for the estimation of this non-linearity and that the method utilized to obtain the creep coefficients values is sufficiently accurate.

O estado como empregador de última instância: uma proposta de pleno emprego, estabilidade e condições dignas de trabalho para o Brasil

GOMES, Z. B. ; LOURENÇO, André Luís Cabral de . Atuação do Estado como empregador de última Instância: uma proposta para eliminar o desemprego estrutural do Brasil. In: Encontro Nacional de Economia Política, 13. 2008, João Pessoa/PB. Anais... João Pessoa: ENEP, 2008.

Valoração do efluente da indústria processadora de pescado por incorporação de nutrientes em aphanothece microscopica nägeli

Nesta tese procurou-se demonstrar a valoração do efluente do processamento de pescado por incorporação dos nutrientes em Aphanothece microscopica Nägeli a diferentes temperaturas. Para tanto o trabalho é composto de cinco artigos que objetivaram avaliar sob o ponto de vista do tratamento do efluente pela cianobactéria Aphanothece e a separação e avaliação da biomassa gerada. O primeiro artigo intitula-se “Influência da temperatura na remoção de nutrientes do efluente da indústria de pescado por Aphanothece microscopica Nägeli”, e teve por objetivo avaliar a influência da temperatura (10, 20 e 30ºC) em um sistema de tratamento pela cianobactéria Aphanothece na remoção de matéria orgânica, nitrogênio e fósforo do efluente oriundo do processamento de pescado. A análise dos resultados mostrou que a temperatura influenciou significativamente na remoção de DQO, NTK, N-NH4 + e P-PO4 -3 . Para os experimentos a 20 e 30ºC todos os limites estabelecidos para os parâmetros avaliados foram atingidos. O segundo artigo intitulado “Efeito de coagulantes no efluente da indústria da pesca visando à separação de biomassa quando tratado por cianobactéria” avaliou o efeito da concentração e pH de dois tipos de coagulantes, cloreto férrico (FeCl3) e sulfato de alumínio (Al2(SO4)3), na separação da biomassa da cianobactéria Aphanothece microscopica Nägeli cultivada em efluente da indústria da pesca, assim como a remoção de matéria orgânica e nutrientes do efluente. Os resultados indicaram que o coagulante FeCl3 foi mais eficaz na remoção de todos os parâmetros testados. No que concerne à separação da biomassa, com um número de seis lavagens foi removido cerca de 97,6% da concentração de FeCl3 adicionado inicialmente. O terceiro artigo com o título “Caracterização da biomassa de Aphanothece microscopica Nägeli gerada no efluente da indústria da pesca em diferentes temperaturas de cultivo” avaliou a composição química da biomassa da cianobactéria Aphanothece microscopica Nägeli quando desenvolvida em meio de cultivo padrão BG11 e no efluente do processamento de pescado. O quarto artigo teve como título “Influência do meio de cultivo e temperatura em compostos nitrogenados na cianobactéria Aphanothece microscopica Nägeli” objetivou avaliar o teor de compostos nitrogenados presentes na biomassa da cianobactéria Aphanothece microscopica Nägeli quando cultivada em meio padrão e no efluente da indústria da pesca nas diferentes fases de crescimento. Para o estudo da composição química e nitrogenados no efluente foram realizados experimentos nas temperaturas de 10, 20 e 30ºC. As concentrações de proteína, cinzas e pigmentos aumentaram com o aumento da temperatura. Por outro lado, foi observada uma redução do teor de lipídios e carboidratos com o aumento da temperatura. O íon amônio juntamente com os ácidos nucléicos representa uma importante fração do nitrogênio não protéico presente na biomassa da cianobactéria Aphanothece. Ficou demonstrada a influência do meio de cultivo na concentração de nitrogênio, bem como a determinação de proteína pelo método de Kjeldahl superestima a concentração protéica em cianobactérias. O quinto artigo intitulado “Produção de proteína unicelular a partir do efluente do processamento do pescado: modelagem preditiva e simulação” avaliou a produção de proteína unicelular através do cultivo da cianobactéria Aphanothece microscopica Nägeli no efluente da indústria da pesca. Os dados cinéticos de crescimento celular foram ajustados a quatro modelos matemáticos (Logístico, Gompertz, Gompertz Modificado e Baranyi). Os resultados demonstraram que o modelo Logístico foi considerado o mais adequado para descrever a formação de biomassa. A análise preditiva mostrou a possibilidade da obtenção de 1,66, 18,96 e 57,36 kg.m-3.d-1 de biomassa por volume do reator em 1000 h de processo contínuo, para as temperaturas de 10, 20 e 30ºC, respectivamente.

Aplicação da metodologia numérica “fast bounds crack” para uma estimativa eficiente da evolução do tamanho de trinca

A significant part of the life of a mechanical component occurs, the crack propagation stage in fatigue. Currently, it is had several mathematical models to describe the crack growth behavior. These models are classified into two categories in terms of stress range amplitude: constant and variable. In general, these propagation models are formulated as an initial value problem, and from this, the evolution curve of the crack is obtained by applying a numerical method. This dissertation presented the application of the methodology "Fast Bounds Crack" for the establishment of upper and lower bounds functions for model evolution of crack size. The performance of this methodology was evaluated by the relative deviation and computational times, in relation to approximate numerical solutions obtained by the Runge-Kutta method of 4th explicit order (RK4). Has been reached a maximum relative deviation of 5.92% and the computational time was, for examples solved, 130,000 times more higher than achieved by the method RK4. Was performed yet an Engineering application in order to obtain an approximate numerical solution, from the arithmetic mean of the upper and lower bounds obtained in the methodology applied in this work, when you don’t know the law of evolution. The maximum relative error found in this application was 2.08% which proves the efficiency of the methodology "Fast Bounds Crack".