138 resultados para Asperity contacts


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The web has emerged as an important media. For the first time, people are highly connected, and users start to have lots of possibilities for expression and collaboration. Internet users contribute more and more to influence the preferences of your contact network. Organizations are beginning to discover that the power of influence networks is becoming more efficient than traditional marketing: people believe in what other people say, peers believe in peers. There is a new actor who builds preferences, who is constantly active in communication: the customer who narrates, on social networks, his experiences with a product, and makes his contacts become loyal customers or the most ardent critics of an organization. Transforming followers into disseminators is one of the biggest challenges of organizations in social media. Because of this, more and more companies have to plan communication strategies based in what customers think, desire, understand and discuss in these new places

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The Vazante Fault Zone (VFZ), located northwestward of Minas Gerais, host the largest zinc deposit known in the Brazilian territory. This structure is hosted in Vazante’s Group rocks, a metassedimentary sequence of marine environment. Near Vazante is situated the south end of the VFZ. To the west, occur the Serra do Garrote inflexion, characterized by a curvature in the contact of Formations Serra do Garrote and Serra do Poço Verde. This structure is through the analysis of aerial imagery of the region and represented in the published geological maps. The objective of this work is to understand what causes this inflexion and determine whether it affects the VZF, causing a shift in the same, and possibly, in the mineralization as well. To this end, it was done a mapping work in the region covering the Serra do Garrote inflexion and the south end of the VFZ, in 1:25.000 scale, supplemented by petrographic description of thin section and geologic sections, with cooperated to the understanding of the structural evolution of the region. Data analysis allowed the identification of six deformation phases. The D1 an D2 phases generated the main foliation. The D3 phase generate kink bands folds, with NS axis and vertical axial plane. The fourth phase is responsible for generating the Vazante Fault Zone. The fifth phase produces low angle folds and shear zones, subparallel to S1//S2. The last phase generates folds with NW axis and vertical axial plane, with causes the inflection of lithologic contactas. Field observations also make possible the conclusion that the Vazante Fault Zone presents a south continuation, which is affected by deformation associated to D6 phase attributing to the trace of the VFZ a curved geometry, similar to that exhibited by lithologic contacts between units of the map

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Here we present the introduction of a range of science´s experimental activities, designed and developed with a focus on the investigative methodology in an interdisciplinary context. The activities have as main theme water and covers topics of heat and temperature, density and states of matter. The relevance of this project is to promote the first contacts of children with Science in an attractive way, and correctly of the scientific point of view, respecting the cognitive level of each child, trying to stimulate the development of hypotheses, creativity and critical thinking, as well as the development of the narrative, descriptive language and drawing. We developed seven lesson plans that were applied in the year of 2012, during three weeks in a school for early childhood education in the city of Bauru. The activities were conducted with fifteen children aged four to six years old together with the teacher responsible for the group. As main contributions in the teaching learning process we cite: acquiring of new vocabulary, progress in the development of hypotheses, development of collective work, evolution of knowledge of the topics covered, and use of the acquired knowledge to new problems and situations

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Studies of mafic-ultramafic bodies have been carried out through the years due to their great use on the interpretation of geochemical and geotectonic processes that took place in Earth's history. Amongst them, chromitites are notably recognized for being excellent indicators of their parental magma chemistry and of different geotectonic environments, as well for frequently containing associated noble metals mineralization. Thus the investigation of one of this ultramafic bodies that occurs inside the Pilar de Goiás Greenstone Belt was proposed, resulting in a detailed map of the chromitites and country rocks, as well as innumerous new data on the chemistry of chromite and associated matrix and accessory minerals. These studies were based upon geological field observations, optic and Scanning Electron Microscope (SEM), besides electron microprobe and cathodoluminescence analysis performed at the “Eugen F. Stumpfl Laboratory” of the Montanuniversität Institute of Resource Mineralogy, University of Leoben - Leoben, Austria. The chromitites are composed of 40-70% in volume of chromite (~50% on average), 14-55% of talc (~30% on average), 3-60% of chromium rich chlorite (~20% on average), traces to 4% of iron hydroxides and traces to 3% of rutile (1,5% on average). The chromite occurs as large spherical aggregates or as fine grained subhedral crystals disseminated in the matrix. This aggregates have diameters of 0.3-1.5 cm (1 cm on average) and are extremely well rounded, massive to intensively fractured, and commonly deformed to ellipsoids. When observed under the microscope, these aggregates show well rounded to slightly irregular borders, but on their interiors, these structures are represented by fine to medium grained euhedral to subhedral chromite crystals that have sharp contacts between themselves. The rock's matrix is basically made of chlorite and talc that define a metamorphic foliation (Sn), being the talc an alteration product ...

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A tectono-stratigraphic study of bivalve coquina-reservoir of Linguado Field allowed to identify two trends of permoporosity development. The delineation of these depositional-diagenetic traps were made through structural and stratigrafic cross-sections and maps. It resulted in the identification of shelf-ramp systems (tilted to SSE), it tickens from 60 to 70 meters and ends against an antithetic fault. The main coquina is bounded by fine siliciclastic units, white clay (low Gamma Ray values) or shale (high Gamma Ray values) lithologies, influencing diagenesis of basal or top coquina limestones (cimented, non-porous). Also in the middle of coquina-reservoir the “clayer” material is also associated with cemented carbonates, with also compartimentalize the reservoir into two subzones. The coquina porosity of the subzones is taken from density-neutron logs, while induction log estimates permeabilities and fluid saturations. It’s noticed the porosity development into pairs, good one followed by a regular/poor one and vice versa. These pairs form verticals succession, pair cycles where porosity improves or decreases upwards. These two scales of pore heterogeneity impose strong layering to the reservoir, and influences fluid saturations, oil-water contacts and porosity cut-offs. In a cross-section with density and induction logs, it can be observed the porosity variation along the shelf-ramp coquina (between 3LI_0004_RJS e 3RJS_0157C_RJ), the porosity is better developed in a downdip direction in the case of the two shelf wells, and also be the three ramp wells. The southern west downdip, 3RJS_0157C_RJ well, has best porosity pairs-cycles; however, its lowest structural conditions favour water saturation. Therefore it is fundamental for reservoir fluid evaluation a cross-plot analysis of RHOB-NPHI and Induction logs

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This work has a focus on project execution DMAIC ( Define Measure Analyze Implement Control) , using the statistical and quality tools to identify , analyze and implement improvements in a given process in order to reduce costs telephony transport of a multinational consumer goods . The multinational consumer goods to be studied has outsourced carriers who perform the distribution of its products , which may lead them straight to their factories or one of its distribution centers to the points of sale ( supermarkets , bakeries , gas stations , convenience cafeterias , among others ) . Whenever there is an unexpected situation or some problem at the time of delivery of the goods to the customer opens an occurrence , ie , the carrier responsible for contacts ( 0800 ) with the contact center company of consumer goods which in turn registers the occurrence, analyzes and sends a response action to the carrier . This work will study the problem with a high number of connections to handle occurrence , through analysis and data collection , identify improvement opportunities, implement them and monitor the results to ensure that the gain and loss reduction are sustainable

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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We present a systematic investigation of the nature and strength of the hydrogen bonding in HX···HX and CH3X…HX (X = Br, Cl and F) dimers using ab initio MP2/aug-cc-pVTZ calculations in the framework of the quantum theory of atoms in molecules (QTAIM) and electron localisation functions (ELFs) methods. The electron density of the complexes has been characterised, and the hydrogen bonding energy, as well as the QTAIM and ELF parameters, is consistent, providing deep insight into the origin of the hydrogen bonding in these complexes. It was found that in both linear and angular HX…HX and CH3X…HX dimers, F atoms form stronger HB than Br and Cl, but they need short (∼2 Å) X…HX contacts.

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Using the method of Social Networks Analysis, we’ll try to see if politicians swap votes between them seeking support for their projects, to this end, we’ll first map the behavior, activities and contacts of the Senators of the Brazilian Federative Republic within all the fixed committees which had some vote during the 52nd Legislature, then we can see the most popular and central Senators to each committee. After this analysis we wish to answer the following question: did logrolling exist in the Brazilian Senate? Previously the empirical analysis and response to the problems posed, we’ll present the necessary theoretical introduction understood by reviewing the literature on relevant subjects, whether they are purely theoretical with respect to the exchange of support, or analytical about the Brazilian political system.

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Immediate functioning of osseointegrated implants has been widely employed in edentulous patients due to its safety and high predictability. However, viability and success of immediate-loaded implants is defined by factors such as number of implants, distribution and splinting, as well as reduction of oblique loads and excessive occlusal contacts. The indirect composite resin-modified glass enable building of a highly aesthetic prosthesis, combining satisfactory resistance and better force dissipation on occlusal loading. This article describes a resin composite, mandibular fixed prosthesis on osseointegrated implants in immediate function.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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The objective of the present article is to introduce Zaira de Bittencourt Martins’s contributions to psychoanalysis in Rio Grande do Sul, identifying her as pioneer in child psychoanalysis in this State. Starting from a historic research based on interviews with psychoanalysts, bibliographical sources and contacts with relatives, the author composed a biographical outline of the psychoanalyst above mentioned. Zaira Martins, together with her husband, the psychiatrist and psychoanalyst Mario Martins, immigrated to Argentina in 1944, and in 1947 was recognized as an analyst by the Argentinian Psychoanalytic Association. On her return to Brazil she became the first non physician woman to make part of the Psychoanalytic Society of Porto Alegre, collaborating with her foundation, in 1963. She played the pioneer role as child psychoanalyst and contributed in the dissemination of Kleinian ideas in her State. She also contributed in the formation of young analysts who were beginners in the child analyst field, through courses and supervisions.

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The objective of this work is to present an analysis of the results of a study about the reading practices of a group of teachers from the public school, discussing how these practices constitute themselves since the initial formation until the teaching period. The selected teachers had their formation between the end of the 60’s and the beginning of the 80’s, remaining as teachers of the public school for the next twenty years. Using as methodology the narrative research, we are going to discuss how the reading appears in the lives of these professionals, what their representations about it are and how the reading permeates their lives and their actuations in the school, passing through the first contacts with the books until the collision between theory and practice, observed in the speech of the teachers who were interviewed, always taking into account the teaching formation.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)