New stricter environmental legislation requires lower emissions and fuel consumption of automotive engines. Therefore the fuel efficiency must be increased but this leads to higher loads in the engine. As for the exhaust system it is affected by higher thermomechanical loads. Until today the turbo manifold has been nitrocarburized in order to increase the wear resistance in slip joints with other exhaust components. The problem is that there is no knowledge of how the nitrocarburizing affects the thermomechanical properties of the material. The purpose of this thesis work is to examine the difference in thermomechanical properties with and without nitrocarburizing on the three different ductile irons High Silicon, SiMo51 and SiMo1000 intended for exhaust components. Thermo-mechanical fatigue (TMF) experiments were performed on test rods to evaluate difference in number of cycles to failure. In each cycle the test-rod was affected by a combination of mechanical loads and thermal loads resembling those found on exhaust components. Light optical microscopy, scanning electron microscopy and x-ray radiography were used to examine microcracks and damage mechanisms of the materials. It was found that the nitrocarburizing did not affect the number of cycles to failure in any large extent. Further, it was also found that SiMo1000 on average has the longest lifetime followed by SiMo51 and High Silicon. Although, the difference is small for many loadings and taking a 95% confidence band into account the curves overlap for many loading cases.

Magnetic fabric, magma flow and tectonic deformation in volcano-plutonic systems ABSTRACT This Ph.D. thesis aims to investigate dynamics of emplacement and tectonic history of selected volcano-plutonic complexes in a continental magmatic arc and back arc setting. The thesis presents new data sets from five field areas, presented in separate chapters, which could be viewed as representing a vertical sections through upper part of an intermediate to felsic magmatic system. From top to bottom in this ‛imaginary' vertical system, the examined units are: (1) andesitic lava domes and (2) sub-volcanic magma chambers (<3 km deep) of the Miocene Štiavnica volcano- plutonic complex, Western Carpathians (Slovakia), (3) Shellenbarger pluton (<3 km depth) within the mid-Cretaceous Minarets caldera, Sierra Nevada batholith in California (USA), and ~7-10 km deep granitoids of (4) Lower-Cretaceous Wallowa batholith, Blue Mountains province in Oregon (USA) and (5) Late Devonian Staré Sedlo complex, central Bohemian Massif (Czech Republic). The research incorporates extensive field and structural data, supported by analysis of igneous textures and anisotropy of magnetic susceptibility (AMS). The latter is further accompanied by detailed examination of magnetic mineralogy using thermomagnetic measurements and optical and back...

Threaded fastener is one of the most common ways to join components. Having a method to test threaded fasteners is key when designing a joint and even more a nutrunner. A joint is often tightened by a torque applied on the head. The applied torque is equal to three quantities in the joint, the thread torque, the underhead torque and the clamp force. To measure these quantities are the propose of a friction test rig. A test rig was built last year to be able to do that in a flexible and effective way. But the test rig built last year does not have the possibility to measure the underhead torque. A new transducer is constructed to add that possibility. The transducer is constructed by using methods such as concept generation, strength calculations, FEM simulations and a comparison of sensors are made. An easy way to change the stiffness is also investigated but no possible solution could be found. Some modifications and trims are also done on the test rig and also a comparison with the older BLM rig. A validation is made of how good the rig perform is also done. The results shows in favour for the FTR but precise results is not possible to determine.

Analisam-se a variação de parâmetros obtidos da curva tensão-deformação dos solos, interpretada como uma hipérbole, em função dos parâmetros de compactação obtidos da curva de compactação Proctor Normal. Esta análise é feita em três solos típicos. / The variation of the parameters obtained by the stress-strain curve of the soils, understood as a hyperbola is analysed in function of the compactation parameters obtained from the Proctor Compactation Curve. This analysis is made with three typical soils.

Esta tese teve como objetivo concretizar a edição de texto fidedigno e anotada de A poetagem bonita, obra idealizada por Mário de Andrade (1893-1945), segundo se depreende de indicação do autor modernista no Fichário Analítico, manuscrito preservado em seu Fundo pessoal, no Instituto de Estudos Brasileiros da Universidade de São Paulo (IEB-USP). A obra, não levada a termo, previa a reunião de artigos de crítica literária, divulgados em periódicos nos anos de 1920 e 1930, tematizando a poesia de vanguarda. Os artigos, localizados e organizados pela pesquisa, oferecem uma reflexão do autor sobre a produção poética no modernismo. A pesquisa se propôs a realizar uma avaliação crítica do material, detectando os principais temas abordados e as linhas de força do pensamento estético de Mário de Andrade; pretendeu ainda ampliar o conhecimento da produção modernista. / This thesis aims to research, organize, and prepare the critical edition of articles of literary criticism by Mário de Andrade that focus predominantly on Brazilian Modernist poetry, published in the 1920s and 1930s. These articles are relevant to studies of Brazilian Modernism because they bring to light Mário de Andrade\'s critical reflection on the movement, in the heat of the \"first moment of Modernism.\" This dissertation has a twofold aim: it establishes a reliable and annotated edition of a proposed collection of essays of criticism by Mário de Andrade, whose history and general outline are preserved in the writers archives, and proceeds to undertake a critical study of the material. By bringing greater visibility to documents that are now to be found in Mário de Andrade\'s library and papers, which have been deposited in the Instituto de Estudos Brasileiros da Universidade de São Paulo, this dissertation contributes to expanding our understanding of the historical reception of Brazilian Modernism.

Compreender deformação e seus métodos de monitoração é essencial na prevenção de acidentes e na manutenção de obras de engenharia civil. O GPS vem se destacando como uma tecnologia poderosa no controle de deformações de estruturas. O objetivo desta pesquisa é fornecer parâmetros para análise do comportamento de uma estrutura, por meio de experimentos e simulações com o uso do GPS. Sistemas e etapas envolvidos na monitoração de deformação são revisados e apresentados. Com o programa científico GIPSY, obtém-se a repetibilidade e a série temporal dos pontos localizados num edifício. O comportamento dos tabuleiros de um viaduto é analisado, com base nos dados GPS. Determinação de deslocamentos e de parâmetros de deformação, torna-se possível, com a realização de simulações. Utiliza-se uma placa para simular estes parâmetros, os quais relacionam-se com as observações em função de um modelo matemático. Elementos adicionais, como dilatação e deformações principais, além de alongamentos unitários e distorções, são determinados. Para verificação de estabilidade, realiza-se o teste de congruência global. / To understand strain and monitoring methods is essential in the prevention of accidents and in the maintenance of works of civil engineering. GPS has been increasingly becoming a powerful technology in the control of strains of structures. The aim of this research is to determine parameters for analysis of the behavior of a structure, by using simulation model and GPS. A review of systems and stages involved in the monitoring strain are revised and presented. With the scientific program GIPSY is obtained the repeatability and time series of the points located in a building. The behavior of the decks of a viaduct is analyzed with base in the data GPS. Determination of displacements and of strain parameters becomes possible with simulations. A plate is used to simulate these parameters and the mathematical model relates them with observations. Dilation or the principal strains are determined. In order to verify stability, it is carried out a global congruent test.

Este trabalho foi realizado tendo como objetivo o estudo do ponto invariante com a temperatura (ZTC - Zero Temperature Coefficient) para transistores com estrutura SOI FinFET em relação aos efeitos de tensionamento e radiação, através da utilização de dados experimentais e de um modelo analítico. Foram analisados primeiramente os parâmetros básicos de tensão de limiar e transcondutância, nos quais está baseado todo o modelo e verificado a influência dos efeitos do tensionamento e da radiação nos mesmos, para analisar o comportamento da tensão de porta no ponto ZTC em dispositivos do tipo n. Foram utilizados dispositivos com três dimensões de largura de aleta (fin) diferentes, 20nm, 120nm e 370nm e comprimento de canal de 150nm e de forma comparativa em dispositivos de 900nm, em quatro lâminas diferentes, sem/com tensionamento e/ou sem/com radiação. A tensão de limiar sofre grande influência do tensionamento, enquanto a radiação tem menor efeito na tensão de limiar na faixa estudada, passando a ter maiores significâncias nos dispositivos tensionados com maior largura de aleta. A transcondutância também sofre maior influência do efeito de tensionamento, sendo neste parâmetro a alteração pelo efeito da radiação muito menor. Contudo estes dois parâmetros geram outros dois parâmetros essenciais para análise do ZTC, que são obtidos através das suas variações em relação a temperatura. A variação da tensão de limiar em relação à temperatura e a degradação da transcondutância também pela temperatura (ou fator c: degradação da mobilidade pela temperatura), influenciam diretamente na eventual variação do ponto de ZTC com a temperatura. Quando estas influências são pequenas ou atuam de forma a compensarem-se mutuamente, resultam em valores de ZTC mais constantes com a temperatura. A tensão de limiar influência direta e proporcionalmente no valor da tensão de ZTC em amplitude, enquanto a degradação da mobilidade (transcondutância) atua mais na constância do ZTC com a temperatura. Com base nestes mesmos parâmetros e com ajustes necessários no modelo foram estudados dispositivos com as mesmas características físicas, porém, do tipo p, onde os resultados encontrados tiveram relação a característica de funcionamento deste outro tipo, ficando claro a inversão da significância dos efeitos quanto a variação da temperatura. O modelo simples e analítico utilizado para o estudo do ZTC foi validado para esta tecnologia, já que foi encontrado valores de erro entre valores experimentais e calculados com um máximo de 13% incluindo toda a faixa de temperatura e a utilização dos efeitos de radiação e tensionamento, tendo mostrado valores discrepantes somente para alguns casos de largura da aleta maiores, que mostraram ter uma pequena condução pela interface canal/óxido enterrado antes da condução na primeira interface, não prevista no modelo. / This work was performed with the aim of the study of the invariant point with temperature (called ZTC - Zero temperature Coefficient) for transistors made with SOI FinFET structure in relation to the mechanical stress and irradiation effects, through of the use of experimental data and an analytical model. Were first analyzed the basics parameters as threshold voltage and transconductance, in which all the model is based and was verified the influence of the mechanical stress and irradiation effects on these parameters, for analyze the gate voltage\'s behavior on ZTC point in n type devices. Were used devices with three different width fin dimensions, 20nm 120nm and 370nm and channel length of 150nm and in a comparative way with 900nm length devices, in four different waffles, with/without mechanical stress and/or with/without irradiation. The threshold voltage suffers big influence from stress, while the irradiation has less effect on the threshold voltage in the studied band, becoming to have more significance on the stressed devices with larger fin width. The transconductance also suffers more influence of the stress effect, being on this parameter the variation caused by irradiation effect smaller. However, these two parameters generate others two essentials parameters for the ZTC analysis, they are obtained through of the previous parameters variation by the temperature. The threshold voltage variation by the temperature and the tranconductance degradation by the temperature (or c factor: mobility degradation by the temperature), influence directly on the eventual variation of the ZTC point by the temperature. When these influences are small or act by the way to compensate mutually, result at ZTC values more constant with the temperature. The threshold voltage influence direct proportionality on the ZTC voltage\'s value at amplitude, while the mobility (transconductance) degradation act more on ZTC stability with the temperature. Based in these same parameters and with necessaries adjusts on the model, were studied devices with the same physic characteristics, but of the p type, where the founded results had relation with the work characteristics of this other type, becoming clear the inversion of significance of the effects by the temperature variation. The simple and analytical model used for the ZTC study was validated for this technology, since it was found error values between experimental data and calculated data with a maximum of 13%, shown discrepant values only for some cases of larger fin widths, that shown to have a small conduction by the channel/buried oxide interface before of the first interface\'s conduction, not previewed in the model.

Thesis advisor: Lisa Dodson / Thesis advisor: C. Shawn McGuffey / Non-traditional students are quickly becoming a statistical majority of the undergraduate student population. Furthermore, nearly one-quarter of contemporary undergraduates is a student parent. Emergent imperatives shaped by technological changes in the economy, deindustrialization, credential inflation, the continuing feminization of poverty and the diminished safety net for low-income families have created a mandate for postsecondary education for anyone hoping to move from poverty into the middle-class. Yet, welfare reforms of the past 17 years have de-prioritized, discouraged, and disallowed post-secondary education as a meaningful pathway for low-income parents to achieve economic mobility, even despite a large body of research demonstrating the connections between higher education and: income, occupational prestige, access to employer sponsored benefits, positive intergenerational outcomes, community development, and broader societal gains. While previous research has focused on the impact of welfare reform on access to post-secondary education for participants within the Temporary Assistance to Needy Families (TANF) cash assistance program, declining overall TANF participation rates indicate that low-income families are largely turning to more diverse strategies to support their families and pursue higher education. Despite both the recent growth of the population of student parents as a significant minority of the undergraduate population, and the rise of governmental initiatives promoting the expansion of post-secondary education and training to traditionally underserved student populations, very little is known about the comprehensive experiences of contemporary low-income mothers as they navigate college while simultaneously working to balance these endeavors with motherhood and family labor, paid employment and public assistance requirements. This dissertation presents the findings of a multi-method institutional ethnographic research process through which the author collected data regarding the experiences of low-income mothers across the country. This process included conducting in-depth interviews with 31 low-income mothers who were currently enrolled in college or who had been enrolled in college within the past year. Additionally, research journals were collected from an additional 20 participants documenting their experiences across an academic term. In total these participants represented 10 states in three regions of the United States: The West Coast, Mid-West, and Northeast. Secondary data were collected through: institutional interviews with student parent program coordinators, collection of primary materials from programs serving student parents throughout the country, and review of primary policy documents regarding higher education and federal and state welfare policies. As a feminist participatory action research project, participatory methods were employed at all stages of the research process and included the use of two interpretive focus groups within campus-based programs serving student parents that both added to the research findings and to the process of analysis and interpretation. The findings of this dissertation begin by painting the picture of the complex lifeworlds of low-income mothers and their simultaneous experience of role strain and material hardship as they work to balance the responsibilities of college enrollment with mothering, work, and the labor involved in researching, applying for and maintaining multiple public assistance benefits. Next, the author argues that conflicts between higher education policies and public assistance policies as experienced by participants shape the strategies through which they attempt to make ends meet and finance their education and ultimately exacerbate their experiences of role strain and material hardship. The author then moves to explore the impact that these policies have on academic outcomes for this sub-set of students. The dissertation concludes with a discussion of the broader social context in which this takes place: one in which policies have been structured on meritocracy rather than equal opportunity for higher education. This presents a dual-edge sword scenario however in that the American Dream both drives the motivation of low-income mothers to persevere in college despite tremendous hardship and personal sacrifice, while it also serves to frame the very policies that make their quest for higher education so grueling. / Thesis (PhD) — Boston College, 2013. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Sociology.

O mapeamento sistemático da folha Campina Grande (1:100.000) apresenta grande importância no entendimento das relações estruturais e geocronológicas dos terrenos que constituem a Zona Transversal da Província Borborema (porção nordeste da Plataforma Sul Americana). Sendo que a área abrangida pelo mapeamento sistemático realizado apresentou-se como um excelente laboratório para aplicação de técnicas clássicas e modernas na área de geologia estrutural. Neste trabalho, buscou-se o desenvolvimento e adequação das técnicas de análise de orientação preferencial de forma (OPF) na caracterização principalmente de tramas minerais em rocha granítica. Também foram utilizadas técnicas e métodos referentes a análise de suscetibilidade magnética (ASM), tramas de eixo de quartzo e a utilização de mapeamento isotópico de Nd. O mapeamento sistemático, juntamente com a análise estrutural e cinemática caracterizou na área de estudo uma série de zonas de cisalhamento verticais de direção NW destrais e de direção NE sinistrais que formam um sistema conjugado situado no segmento oriental do Lineamento Patos (Província Borborema), a qual é aqui denominado \"Sistema de Cisalhamento Campina Grande\". As zonas de cisalhamento que compõem o \"Sistema de Cisalhamento de Campina Grande\" apresentam forte influência na colocação dos plútons graníticos da Zona Transversal. Os estudos de anisotropia de suscetibilidade magnética (ASM) e análise de orientação preferencial de forma em tramas minerais (OPF) ressaltam a influências destas zonas no alojamento dos corpos graníticos regionais, principalmente nos Plútons de Campina Grande e Serra Redonda. O estudo da trama de eixos-c de quartzo nos milonitos do \"Sistema de Cisalhamento de Campina Grande\" nas faixas quartzozas confinadas na foliação milonítica é consistente com diferentes critérios cinemáticos verificados em meso- e macroescala. As tramas podem ser descritas por guirlandas simples ou cruzadas relacionadas a ativações combinada dos sistemas de deslizamento basal e romboédrico sob temperatura baixa a moderada (300 a 600º C). As microestruturas são típicas de deformação dúctil do quartzo associado recristalização dinâmica, enquanto no K-feldspato predomina o microfraturamento. O sistema transcorrente conjugado é resultante de esforços compressivos de direção NNW-SSE, que também são responsáveis pelo cavalgamento do embasamento Paleoproterozóico sobre o plúton granítico Brasiliano da Serra Redonda. A progressão e localização da deformação mantiveram a cinemática regional consistente até os estágios tardios da deformação finita registrada em ultramilonitos. O \"Sistema de Cisalhamento de Campina Grande\" apresenta seu período principal de evolução situado no intervalo de 590 a 570 Ma que é associado a intenso magmatismo granítico. E representa o produto da interação dos segmentos crustais da Zona Transversal possivelmente associado a eventos transpressivos. Os segmentos crustais que compõem a Zona Transversal apresentam assinaturas isotópicas distintas de Sm-Nd (relacionada aqui como Grupo I e II). O primeiro padrão reconhecido (Grupo I) é caracterizado em gnaisses de origem supracrustal e ortognaisses graníticos pertencentes ao Terreno Alto Pajeú (TAP) que exibem assinatura isotópica com idades TDM 2,0 a 1.0 Ga e ?Nd(0) com valores no geral menores que - 20,0 e razões Sm147/Nd144 maiores que 0,12. O outro padrão isotópico (Grupo II) apresenta uma assinatura com idades TDM paleoproterozóicas a arqueanas (2,0 a 3,0 Ga), ?Nd(0) com valores entre -20,0 e -35,0 , razões Sm147/Nd144 concentrada no intervalo de 0,08 e 0,12 e é associado as rochas do Terreno Alto Moxotó (supracrustais e ortognaisses diversos). Os valores de ?Nd(950) no TAP apresentam uma variação entre -4,19 a +0,03, o que sugere uma considerável contribuição de materiais/fontes juvenis na formação das rochas deste terreno. Já no TAM os valores de ?Nd(2000) para o TAM variam de -11,28 a +1,73. Os valores positivos de ?Nd(2000) também sugerem a contribuição de materiais/fontes juvenis na formação das rochas deste terreno. Já os valores negativos sugerem retrabalhamento de fontes crustais arqueanas. As assinaturas isotópicas dos dois eventos acrescionais de crostas são observadas nas intrusões graníticas da Zona Transversal, o que indica as contribuições dos Terrenos Alto Moxotó e Alto Pajeú como fonte crustais para o magmatismo regional. Os granitos também apresentam forte relação com fontes associadas à fusão de crosta continental. As idades U/Pb delimitam três principais períodos de magmatismo (cristalização de rocha) nos períodos de 2100 Ma, 950 Ma e 560 Ma na Zona Transversal na área de estudo. Os dois primeiros períodos são associados aos eventos de acresção e geração de crosta no Paleoproterozóico e no Eoneoproterozóico. E o ultimo associado ao magmatismo brasiliano das intrusões graníticas. Estes eventos também são registrados pelos dados isotópicos Rb-Sr, que se alinham às retas de regressão de referência de 2100 Ma, 950 Ma e 560 Ma. Os dados Rb-Sr refletem a homogeneização isotópica nestes períodos, ou por eventos magmáticos ou por metamorfismo. / The systematic mapping of Campina Grande sheet (1:100.000) is very important to understand the structural and geochronological relations between different terranes of the Transversal Zone, Borborema Province (NE Brazil). The mapped area is an excellent natural laboratory to apply classical and modern techniques of structural geology for the study of mechanisms of generation and evolution of ductile shear zones. This work aimed the evaluation, adaptation and validation of techniques for shape preferred orientation analysis to characterize granitic and metamorphic rock fabrics. Additionally, we used a multi-method approach, with the application of anisotropy of magnetic susceptibility analysis, quartz c-axis fabrics and Nd isotopic mapping integrated with conventional geologic studies. A network of transcurrent shear zones formed by NW-trending dextral and NE-trending sinistral zones was recognized by systematic mapping, structural and kinematic analysis. These shear zones form a conjugated system located in the oriental segment of the Patos Lineament (Borborema Province), here denominated as the Campina Grande Shear System. The Campina Grande Shear System strongly influenced the emplacement of granitic plutons in the Transversal Zone. This fact is emphasized by anisotropy of magnetic susceptibility analysis and shape preferred orientation fabrics, mainly for the Campina Grande and Serra Redonda plutons. C-axis fabrics in quartz-mylonites of Campina Grande Shear System show single and cross guirdle patterns consistent with kinematic criteria recorded in meso- and regional macroscale. They are related to the activation of mainly basal and rhomboedric slip systems in a low to moderate temperature (300 a 600º C). Microstructures in quartz indicate the deformation mechanisms include crystal plastic and recrystallization processes, but ductilebrittle strains in feldspar. The conjugate shear zone system agrees with a bulk NNW-SSE trending shortening direction. It was also responsible for the thrusting of the Paleoproterozoic basement to over younger rocks of the \"Alto PajeúTerrane\". The principal phase of the Campina Grande Shear System evolution occurred between 590 and 570 Ma, concomitant with intense granitic magmatism, and represents the product of the interaction of the Transversal Zone segments, possibly associated with transpressive events. The Transversal Zone crustal segments display two main distinct patterns of Sm-Nd isotopic signatures (groups I and II). The group I, characteristic of paragneisses and granitic orthogneisses from the Alto Pageú Terrane (APT), exhibits Nd model ages (TDM) between 1,0 and 2,0 Ma, ?Nd(0) values generally lower than -20,0, and Sm147/Nd144 ratio higher than 0,12. The group II, related to supracrustal rocks and orthogneisses from the Alto Moxotó Terrane (AMT), shows Paleoproterozoic to Archean Nd model ages (2,0 a 3,0 Ga), ?Nd(0) values between -20,0 and -35,0, and Sm147/Nd144 ratio from 0,08 to 0,12. The ?Nd(950) values from the APT vary between -4,19 and +0,03, suggesting important contribution of juvenile material and sources in the rock formation in this terrane. The ?Nd(2000) values from the AMT vary from - 11,28 to +1,73, reflecting reworking of Archean crustal sources and contribution of juvenile material in the rock formation. The isotopic signatures of the two crustal accretionary events (ca. 2000 and 950 Ma) are observed in granitic plutons of the Transversal Zone, indicating that the Alto Moxotó and Alto Pageú terranes contributed as crustal sources for the regional magmatism. The granitic plutons also show strong relation with sources associated to melting of the continental crust. U-Pb age data delimit three principal magmatic events in the Transversal Zone in the study area (ca. 2100 Ma, 950 Ma and 560 Ma). The two former events are associated to crustal accretion and generation, and the last event related to Brasiliano granitic magmatism. Rb-Sr isotopic dates also registered these events, reflecting isotopic homogenization during magmatic and/or metamorphic events.

Esta pesquisa inscreveu-se no campo da Saúde Mental Relacionada ao Trabalho (SMRT). Intencionou investigar a relação entre o desgaste mental em mulheres motoristas de ônibus da cidade de São Paulo e a questão de gênero, ou seja, tendo como base a Teoria do Desgaste Mental, proposta por Edith Seligmann-Silva, pretendeu compreender as possíveis influências do gênero e de suas relações no processo de desgaste mental no trabalho. A metodologia foi qualitativa e se dividiu em etapas. A primeira consistiu em um período de observação do trabalho dessas motoristas. Na segunda foram realizadas entrevistas semi-estruturadas, para que fosse possível acompanhar e compreender a organização do trabalho das motoristas, além de destacar os significados atribuídos ao trabalho e às relações de gênero vivenciadas e os impactos disso no processo de desgaste mental. Concluímos que os processos de desgaste das mulheres trabalhadoras do transporte têm particularidades que envolvem as questões de gênero. A estrutura física dos ônibus e terminais, a organização das linhas e as relações de trabalho afetam as mulheres e sua saúde de forma particular. A divisão sexual do trabalho e a conciliação entre trabalho doméstico e trabalho assalariado mostraram-se como um desafio para essas mulheres. Finalmente, o modo como elas veem a si mesmas e as outras mulheres também se mostrou como um fator central no processo saúde-doença / The main purpose of this research was to investigate the relation between mental strain in female bus drivers of São Paulo and gender. The theoretical support is Edith Seligmann-Silvas Mental Strain Theory. It intended to understand the possible influences of gender and their relations in the process of mental strain at work. The methodology is qualitative and is divided into stages. The first consisted of observation of the daily work of these drivers. The second part was the semi-structured interviews. It was possible to understand the works organization of the drivers, besides highlighting the ways the signify their work and the gender relations in it, to understand their consequences in the process of mental exhaustion. The conclusion was the mental strain processes contains specificities related to gender issues. The structure of bus stops and vehicles, the routes organizations and relations in work environment, impact women health in a particular way. The sexual division of labor and the conciliation of house work and labor are a challenge to these women. Finally, the way they see themselves and other women is also central to the mental health process