Identificação de causas especiais no processo que aumentam a ocorrência de poro na solda de tubos de aço: aplicação etapas definir, medir e analisar do DMAIC

This work covers the methodology Six Sigma with the application of the steps Define, Measure and Analyze a company of steel tubes, with the objective of identify special causes in the process that drives the creation of the pore defect in the solder. It is highlighted the fact that this work is the base of an continuous upgrade project that aims in eliminating the occurrence of this defect. The motivation is given to the necessity of improving the productivity of the factory, considering that the defect occurs at random and your causes are unknown. This way, it was defined that the problem to analyze, measured the capability of the process in DPMO and analyzed with the aid of graph by attribute P. The results show the process that present special cases, as well as the process considered ideal, This way it was stated that in this work, the processes destabilized and the controlled, allowing a comparison of the characteristics for the elaboration of concise action plans to eliminate the defect. The project must follow the steps Upgrade and control the methodology Six Sigma, in order to ensure success in his execution, aiming to amplify the competitive edge of the business

Caracterização petrográfica dos alvos Hidrotermalitos Norte e Sul, Suruca e porção NW da Mina de Chapada - Alto Horizonte, GO

Main occurrence of Cu-Au in Goias Magmatic Arc, the Chapada mine fits into the geological context of the Brasilia Fold Belt, specifically in the Mara Rosa Magmatic Arc. Four targets, named Hidrotermalito Norte and Sul, NW Chapada Mine Portion and Suruca, are situated in this context, which includes ortogneisses and rocks from the Mara Rosa volcanic-sedimentary sequence. All these targets have been studied due to the possibility of presenting a great potential in Cu-Au, as well as the Chapada mine. Hidrotermalitos Norte and Sul targets presents four lithological sequences, which were identified as: quartz-muscovite schist; muscovite quartzites and kyanite quartzites; quartz-biotite-amphibole schist with pyrite and epidote-amphibole-biotite gneisses with muscovite; muscovite-biotite gneisses. They are metamorphosed to amphibolites facies and retrogressive greenschist facies. Sulfetation represented mainly by pyrite. In the NW Chapada Mine Portion, three main lithological groups were identified and classified as biotite gneisses; honblende-quartz-biotite-schist; amphibolites, with the first group metamorphosed in greenschist facies (low grade), and the other two groups metamorphosed in amphibolites facies, with subsequent retrogressive metamorphism in greenschist facies. Sulfetation is represented by chalcopyrite and pyrite. Finally, also three main lithological groups were identified in the Suruca target, classified as garnet-chlorite-epidote-eiotite gneiss; biotite gneiss and chlorite-biotite gneiss with epidote and muscovite; muscovite-quartz schist, all them metamorphised in amphibolites, with retrometamorphism in greenschist facies. Sulfetation represented by pyrite and sphalerite

Caracterização estrutural da porção central da Bacia de Santos e seu embasamento continental adjacente, através de interpretação de imagens de satélites e geofísicas

The Santos Basin is located in the Brazilian continental margin and includes the coast of Santa Catarina, Paraná, São Paulo and Rio de Janeiro states. Its northern limit is the Campos Basin through the High of Cabo Frio and the southern one with the Pelotas Basin through the Platform of Florianópolis, totaling an area of approximately 350,000 square kilometers in a water depth of 3,000 m. The Paranapanema Lineament has WNW / ESE direction, and extends from the area filled by the Paraná Basin, on the border between the states of Sao Paulo and Parana, lasting up to near the ocean floor along with the fracture zone of Rio de Janeiro. The Capricorn Lineament is a feature inherited from the separation between the continents of Africa and South America, and is the main structural feature NW / SE of the Santos Basin center-south region. These two structures together with other ones with continental origin may be associated with structural features in the sediments from the Santos Basin. This work aims to characterize the structures operating in the central portion of the Santos Basin based on subsurface data in the offshore area (2D seismic) together with data from the surface of the continental basement in a way to correlate the Santos Basin structures with the continental regional traits. This data interpolation showed that the structural features of the continent operates on the submerged zone, the seismic sections show these structural trends for the Paranapanema Lineament / Fracture Zone of Rio de Janeiro, Capricorn Lineament and two fault zones that exhibit structures typical of a transfer zone

Levantamento estrutural da porção norte do Greenstone Belt do rio Itapicuru e dos Alvos Encantado e C1W, Bahia

The study area is located in the geological context of the northern portion of the Rio Itapicuru Greenstone Belt (GBRI), located northeast of the São Francisco Craton, Bahia State. The GBRI is known for its great economic potential for gold mineralization, looking south at Fazenda Brasileiro Mine and North Mine Maria Preta, is situated in the study área. The structural pattern of the northern portion of the Greenstone, theme of this work, is of great importance to understand the mineralization present. To characterize the structural model three geologic sections (scale 1:25000) were made with NW-SE and EW directions and detailing two mineralized targets, Encantado, located northwest of the area, near the city of Nordestina, and C1W, located near Itapicuru River, west of the Maria Preta mine. Thus, field work and petrographic analysis were conducted, that allow to indicate the existence of two structural domains characterized by the existence of a main foliation, low angle dipping main foliation and another with high dip angle, both with NW, moreover, folds occur in the area Dn-1 and post-Dn folds. Dn-1 folds are observed less frequently but they occur mainly forming an oblique foliation and the Sn is present in porphyroblasts observed in petrographic analysis, whereas in relation to the folds post Dn, there are more than one type of folding in area, which differ by the orientation of their axis, a post Dn NS and EW Dn another post. Moreover, two areas of metamorphic green schist (biotite zone) and medium amphibolite, which are directly related to the structural domains found

Determinação de metais pesados no caranguejo comestível Ucides cordatus (Crustacea: Decapoda)

Não disponível

Quimioestratigrafia do vulcanismo ácido mesozóico da província magmática do Paraná: porção SE do estado de Santa Catarina

The Mesozoic acid volcanism of the Paraná-Etendeka Province can be considered as one of the biggest events of its kind in the Earth's surface, and its study have attracted special interest in characterizing the end of magmatism that preceded the rupture process and the formation of continental Africa and South America Although significant, the acid volcanism featuring Members Chapecó Palmas and Serra Geral Formation represents only 2.5% of the total generated by the magmatic rocks and perhaps therefore the existing literature on these rocks is well less significant than that on the basalts. However, there are still aspects still unclear about the origin and evolution of these rocks in relation to the associated basalts. Thus, two profiles were selected, called RA and TA, which be a systematic collection of samples from the base where the Botucatu Formation sandstones occur at the top, where they observe Palmas acid rock type. These samples should be analyzed for major, minor and trace elements and treated in specific diagrams to define the vertical variation lithochemistry and their possible relationships with the associated basalts

Venografia da porção distal dos membros de ovinos e caprinos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Mensuração da profundidade da porção lateral da fossa mandibular, em imagens radiográficas da ATM, obtidas pela técnica transcraniana, em pacientes com dentição decídua, mista e permanente

The author has verified the average depth of the mandibular fossa, in the X-ray image, using the oblique lateral transcranial technique from the right and left sides samples of each patient, which included a total of 176 patients, 87 male and 89 female. The patients were in following phases: deciduous dentítion (the patients had only deciduous teeth in the oral cavity or, if they had any permanent teeth, they could not be in occlusion), mixed dentition (the patients presented deciduous and permanent in the oral cavity) and permanent dentition (the patients had only permanent teeth in the oral cavity), until the eruption of the permanent third molars, in the region from São José dos Campos. São Paulo. Brazil. The patients were under treatment at the Dental School. UNESP (São Paulo State University). ln order to measure the depth of the mandibular fossa in millimeters an imaginary line was traced on the X-ray image, perpendicular to the other line that served as a reference, which was traced from the botton part of the articular eminence up to the tympanosquamous fissure. After the data were obtained and put in a data sheet, they underwent statistical analysis. The results showed that, in the average, the depth of the mandibular fossa in masculine sex is non-statistically signíficant larger than what was observed in feminíne sex, and the right side is larger than the left side, with significant statistical differences. However, only in permanent dentition, in masculine sex, the depth of the mandibular fossa on the right side is larger than on the left side with significant statistical differences

Modelo deposicional de carbonatos albianos da Formação Quissamã: análise faciológica, diagenética e estratigráfica de um campo de óleo na porção meridional da Bacia de Campos

Pós-graduação em Geologia Regional - IGCE

Sucessão estratigráfica e tratos de sistemas do Membro Romualdo, porção leste da Bacia do Araripe, nordeste do Brasil

Located in northeastern Brazil, the evolution of Araripe Basin has been associated with the fragmentation of Gondwana and opening of the South Atlantic. The Santana Formation belongs to the post-rift sequence of the basin and is characterized by the presence of laminated limestones in the lower portion (Mb. Crato), evaporite (Ipubi) and siliciclastics (Mb. Romualdo). For better understanding of the Romualdo's stratigraphy, depositional environments and tract of systems, a stratigraphic analysis was made with representative columnar sections of the unit. Sedimentary facies have been described in detail, as well as paleocurrents measured at different stratigraphic levels. It was found that the contact of Mb. Romualdo with the carbonate-evaporite section (Mbs. Crato and Ipubi) is a unconformity, evidenced by residual lags and thin layers of conglomerates above the contact. Above the conglomeratic levels predominate fine sandstones / medium interlayered with calciferous green shales. The percentage of shales increases towards the top, featuring retrogradational stacking culminating in layers of coquinas, excellent stratigraphic mark in the basin. Thin layers of coquins of gastropods comprising equinoids, located on the shale section, present in three sections marine deposits are associated with surfaces ravine. The upper section is characterized by recurrent facies of green shales, sandstones intercalated with sandstones progressively become more frequent towards the top of the unit, featuring the regressive part of the cycle. The sandstones present cross-stratification, often with mud clasts and clay layers in the foresets, and beddings of flaser type and wavy in heterolitic facies, suggesting the action of tidal currents. Paleocurrents measured in the sandstones show gaps with opposite flow directions outlining bipolar standards, which reinforce the interpretation of shallow marine environment influenced by tides during the sedimentation...

Envolvimento da neurotransmissão glutamatérgica da porção dorsolateral da ponte no controle cardiorrespiratório

Em condições de hipóxia (redução da pressão parcial de oxigênio), respostas reflexas de aumento da ventilação pulmonar, aumento da pressão arterial e diminuição da frequência cardíaca são observadas com o objetivo de aumentar os processos de trocas gasosas e perfusão tecidual. Para que essas respostas reflexas à hipóxia ocorram, quimiorreceptores periféricos são ativados pela redução da pressão parcial de oxigênio arterial e enviam sinais excitatórios para o sistema nervoso central, promovendo a excitação de importantes núcleos cerebrais envolvidos com o controle das atividades respiratória, simpática e parassimpática. Evidências experimentais sugerem que os neurônios do complexo parabraquial/Kölliker-Fuse (PBN/KF), importante região respiratória localizada na porção dorsolateral da ponte, contribuem para o processamento das respostas cardiorrespiratórias do quimiorreflexo. Contudo, os neurotransmissores envolvidos ainda não foram explorados. No presente projeto, exploraremos a hipótese de que a neurotransmissão glutamatérgica da região PBN/KF é importante para a manutenção da ventilação basal e para o processamento das respostas ventilatórias à hipóxia. Para tanto, utilizamos a técnica de microinjeção de agonistas e antagonistas dos receptores de L-glutamato no PBN/KF de animais anestesiados e não anestesiados, avaliando parâmetros ventilatórios (eletromiografia dos músculos diafragma e abdominal em animais anestesiados; e frequência respiratória, volume corrente e ventilação minuto em animais não anestesiados) e parâmetros cardiovasculares (pressão arterial e frequência cardíaca em ambas condições experimentais) em condições de repouso ou em situações de estimulação dos quimiorreceptores periféricos (com cianeto de potássio). Nossos dados mostram que nos animais anestesiados houve uma redução...

Envolvimento da neurotransmissão glutamatérgica da porção dorsolateral da ponte no controle cardiorrespiratório

Em condições de hipóxia (redução da pressão parcial de oxigênio), respostas reflexas de aumento da ventilação pulmonar, aumento da pressão arterial e diminuição da frequência cardíaca são observadas com o objetivo de aumentar os processos de trocas gasosas e perfusão tecidual. Para que essas respostas reflexas à hipóxia ocorram, quimiorreceptores periféricos são ativados pela redução da pressão parcial de oxigênio arterial e enviam sinais excitatórios para o sistema nervoso central, promovendo a excitação de importantes núcleos cerebrais envolvidos com o controle das atividades respiratória, simpática e parassimpática. Evidências experimentais sugerem que os neurônios do complexo parabraquial/Kölliker-Fuse (PBN/KF), importante região respiratória localizada na porção dorsolateral da ponte, contribuem para o processamento das respostas cardiorrespiratórias do quimiorreflexo. Contudo, os neurotransmissores envolvidos ainda não foram explorados. No presente projeto, exploraremos a hipótese de que a neurotransmissão glutamatérgica da região PBN/KF é importante para a manutenção da ventilação basal e para o processamento das respostas ventilatórias à hipóxia. Para tanto, utilizamos a técnica de microinjeção de agonistas e antagonistas dos receptores de L-glutamato no PBN/KF de animais anestesiados e não anestesiados, avaliando parâmetros ventilatórios (eletromiografia dos músculos diafragma e abdominal em animais anestesiados; e frequência respiratória, volume corrente e ventilação minuto em animais não anestesiados) e parâmetros cardiovasculares (pressão arterial e frequência cardíaca em ambas condições experimentais) em condições de repouso ou em situações de estimulação dos quimiorreceptores periféricos (com cianeto de potássio). Nossos dados mostram que nos animais anestesiados houve uma redução...

Coeficiente de absorción a incidencia normal de espumas de aluminio de poro abierto fabricadas mediante el método de infiltración

Dependiendo de la conexión entre sus poros, las espumas metálicas se clasifican en espumas de poro abierto o poro cerrado. La mayoría de las espumas que se comercializan actualmente son espumas de poro cerrado. Sin embargo, para algunas aplicaciones son más apropiadas las espumas de poro abierto. En este trabajo, se estudia el coeficiente de absorción en tubo de impedancia de espumas de aluminio de poro abierto fabricadas mediante el proceso de infiltración. Estas espumas se caracterizan por una estructura muy homogénea y por un elevado valor del coeficiente de absorción a bajas frecuencias cuando se combinan con una cámara de aire