Analise de defeitos em motores através de vibração mecânica: estudo de caso

Revolving machines are among the most used equipment in general industry and therefore expenditures on this equipment class are a significant portion of the total amount spent by the company. If there is an unscheduled stop of some of this equipment, industrial plants can lose huge amounts of money caused by interrupted production and parts delay. Others may increase significantly maintenance costs due to consequences elsewhere not affected before. Even plant and people safety can be in danger if there is an operation interruption without a backup system start. This work is focused on a rotating system case study which is monitored by vibration analysis that shows that is possible to determine when is the most appropriate time for equipment intervention without any reliability loss just by using a simple and cheap system which is not much used because professionals are not aware to its utility. Industrial facilities were evaluated by fail detection and historical analysis in some equipment in order to show feasibility of vibration analysis through a before-during-after process. The plant evaluated is part of a chemical multinational located in Guaratinguetá-SP. At this time, that plant had around 650 critical equipment monthly monitored and no unscheduled shutdown was registered in one year period due to equipment monitoring

Estudo analise e exemplo de aplicação de geração eólica

Brazil economic growth has to predict the need for implementation of new energy sources to ensure the continuity of the economic growth and improvement of life of the brazilian population. Until this moment, this assistance included the construction of large hydroelectric plants, mainly in the amazon region, where the environmental impact is difficult or, as in the case of the Belo Monte made this impossible so far, the implementation of these projects. In this work is conducted a study that demonstrates an example of application of wind energy, through an assessment of wind resources in the brazilian Northeast for the implementation of a wind farm

Analise mecânica e microestrutural em estruturas tubulares aeronáuticas soldadas de aço ABNT 4130

Airplane Motor Cradles have a complex geometry, since they require different conbinations between different tubes and TIG welded in several angles. In T-25 aircraft and Universal T-27 Tucano (EMBRAER / FAB), besides having to bear the engine balance, these components maintain fixed the nose landing gear in another extremity. They are considered critical to flight safety, and for this reason, the aviation standards are extremely rigid in their production, imposing a zero index” of defects on the final weld metal quality. These structures may be containing an historical of welding repairs, whose effects on their structural integrity are not computed. In this work we analyzed the standardised AISI 4130 steel and the raw steel of tubes to the Airplane Motor Cradles. First of all, microscopy and microanalysis of the base steel, then we analyzed the effects of the TIG weld. Tensile testing was conducted to measure the difference between the mechanical properties of standardised steel and without this treatment

Analise dos trabalhos de conclusão do curso de engenharia de produção da UNESP de Guaratinguetá

This work is quantified according to the ABEPRO areas, the number of works the Course Conclusion (TCCs) and Hours (CH) Course of Production Engineering, UNESP Guaratinguetá. Based on this quantification were found to be significant discrepancies between the TCCs and CH. Quality and Logistics observed for the larger discrepancies, with 26% and 17% of the number of TCCs, respectively. Both areas have only 6% of the time. They are also used data from researchers at the National Council of Scientific and Technological Development (CNPq) in the areas of Production Engineering. In the area of Quality and Logistics, the researchers account for 8% and 5%, respectively, but are most prominent researchers in the field of Operations Research, with 37%. However, this view can help the department to organize the curriculum, with the development of teaching projects, methods and means of education, and visibility to help future hiring for the department

O gênero acadêmico: resumos nas áreas de Antropologia, Linguística e Ciência Política

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

Analise microbiológica da flora intestinal do mosquito Aedes Aegypti através do sequenciamento do gene 16S rRNA na plataforma Illumina MiSeq

Dengue é uma arbovirose que afeta cerca de 100 milhões de pessoas anualmente, em mais de 100 países situados nas regiões tropicais e subtropicais. Foi considerada a doença viral que mais cresceu no ultimo ano, repercutindo em impactos sociais e econômicos nas regiões endêmicas devido às altas taxas de morbidade e mortalidade desencadeadas pela infecção. O principal vetor da dengue é o mosquito Aedes aegypti, presente em toda a faixa tropical e subtropical. Por apresentar hematofagia antropofílica, rápido desenvolvimento e características comportamentais especificas, é um excelente transmissor do vírus dengue. Medidas de controle da disseminação da dengue são restritas à eliminação do mosquito vetor, e um tratamento específico ainda não foi desenvolvido, bem como a criação de uma vacina que previna simultaneamente a infecção pelos quatro sorotipos do arbovírus. Uma característica que determina a disseminação de doenças é a alta competência vetorial de seus mosquitos transmissores, que tem sido associada à composição da microbiota intestinal do inseto. As bactérias presente no intestino do mosquito exercem funções relacionadas a sua nutrição, desenvolvimento e reprodução, e são também um importante fator na eliminação de patógenos, por interferirem diretamente na atividade viral, ou indiretamente a partir da ativação das vias antivirais pelos micro-organismos. Dessa forma, este trabalho visa estudar a diversidade microbiana intestinal do mosquito Aedes aegypti em diferentes estágios de vida, através de sequenciamento de última geração com a plataforma MiSeq Illumina

Analise de desgaste em materiais aplicados em discos de freio

Baja SAE competitions challenge engineering students to design and build offroad vehicles, preparing them for the competitive job market. This monograph aims to study a part of the braking of a Baja SAE vehicle system, the brake disc. Giving attention to the wear suffered by discs of two different materials, steel 1045 and stainless steel 304, helping the team Piratas do Vale Bardahl in the best selection between them. Braking tests were performed on a test bench. Both discs have suffered the same braking conditions. Brake pads material, brake line pressure, braking time, number of braking, were parameters which were repeated in the testing of different types of disk, in order to ensure a high power comparison between the obtained data. Before and after the disk tests were weighed and measured, to make a comparison. After the brake tests, the disks were subjected to hardness and surface roughness testing. With the data collected and observations made in the worn parts, the comparison between these two materials was made, obtaining a selection of the best material for the team. The tests showed that steel 1045 has more advantages, compared to stainless steel 304, when applied to brake discs, on the tested conditions

Analise comparativa do desempenho de ferramentas no torneamento do aluminio 2024

The aluminium alloys are used in many fields because of their versatility combined with the excellent aluminium’s properties, mentioned in the study. This study aims to compare the performance of polished Hard Metal, Hard Metal covered with TiB2 and High Speed Steel (HSS) tools, at the aluminium 2024 alloy’s turning, as a function of variation of some turning parameters such as: feed, depth of cut and cutting speed; and study the surface finish and the required power during turning by processing the output data, like analyze the chip’s features for each used tool. The results provide information of the tool’s material effects, when submitted to different turning conditions, about the output variable in question. In this way, it was possible to notice that although the Hard Metal covered with TiB2 tool has provided the better surface finish, the chip’s features were better when the turning was accomplished by the Polished Hard Metal tool. In relation to the required turning’s power, the lowest consumption occurred with the High Speed Steel tool

Analise das emissões de CO2 e de energia - simulação com novas tecnologias siderúrgicas

The process of steel production emits a large quantity of greenhouse gases, specifically carbon dioxide (CO2), and the reduction of such emissions is one of the main challenges for the industry in the 21st. Century. To quantify these emissions, the Worldsteel Association (association of the 170 large steel manufacturers of the world) published a methodology (CO2 Emission Data Collection) for calculation and comparison of CO2 emissions among its members. After that, in 2010, this methodology became an ISO (International Organization for Standardization) norm. Today, the calculation of the CO2 emissions in steel making companies follow the ISO 14404-1 for units with blast furnaces and the ISO 14404-2 for units with electric furnaces. In the last years, new technologies were and continue to be developed for the steel making sector aiming at energetic improvements and greenhouse gas reductions (mainly CO2) by the several processes involved in the production of steel. This work had the objective of producing a tool to calculate the CO2 emissions for the steel making sector. An Excel spreadsheet was developed to calculate the emission intensities of CO2 of a steel plant, the Usina Presidente Vargas, of the Companhia Siderúrgica Nacional (CSN). The spreadsheet furnishes results of CO2 emissions and energetic fluxes, and simulates the benefits that some of the new technologies can give to the company. The spreadsheet calculates the emissions in two ways: a) based on the carbon fluxes that enter the unit, and b) based on the emissions of each specific process within the unit (coking, sinterization, blast furnace, among others)

Analise técnica, econômica e ecológica da incorporação de sistemas de gaseificação de bagaço de cana-de-açúcar no setor sucroalcooleiro: uso de ciclos combinados para o aumento da oferta de eletricidade

Pós-graduação em Engenharia Mecânica - FEG

Analise fonológica de nomes próprios de origem estrangeira e novas criações em português brasileiro

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

Otimização de método para analise de tebutiurom, diurom e seus produtos de degradação em água superficial

In 2001, it was estimated that pesticide used worldwide exceeded 2.27 billion kilograms, over 35%, of which, were herbicides. Brazil is considered one of the leaders in the production of sugarcane and mainly ethanol as fuel. The monoculture of sugarcane requires the usage of a range of pesticides, among these, the herbicides diuron and tebuthiuron. The degradation products most studied (DCA and DCPU) are diuron's, especially for toxicological characteristics of this herbicide that is identified as carcinogen and suspected to be endocrine disruptor in mammals. After optimization of the chromatographic separation using HPLC-UV, the analytical curve was constructed in solvent and subsequently in the matrix (surface water). The extraction method contains the usage of SPE (solid phase extraction) (Strata-X, 200 mg/6 mL), applicating 1L of sample and elution with 5 mL of acetonitrile / methanol (50:50, v/v). Analysis by HPLC/UV was performed in gradient mode, acetonitrile/water (70/30-74/26 by 1 min, 74/26 - 78/22 till 3.2 min, returning to initial conditions and remaining this way until 10 min), 018 column (Phenomenex, 4.6 mm diameter, 250 mm long and 5pm particle size) and detection at 254 nm. Tests F and t were performed to verify the presence of the matrix effect. There was matrix effect to all analytes, ranging from -33% (DCA) and 38% (tebuthiuron). Thereby the method was optimized and validated for analysis of diuron, tebuthiuron, and DCPU DCA in surface water using HPLC/UV. The data obtained show that in order to assure the analytical reliability desired the use of the analytical curves in the matrix for the quantification of these analytes in water is required.

Analise cladística - filogenética e paleobiogeográfica dos Mesoeucrocodylia (Crocodylomorpha; Crocodyliformes) do Grupo Bauru (Cretáceo Superior) do Sudeste do Brasil

Pós-graduação em Geociências e Meio Ambiente - IGCE

Morphometric characteristics of Prochilodus lineatus (Valenciennes 1847), of the migratory and resident stocks of the river Mogí-Guaçu, São Paulo State, Brazil

A espécie Prochilodus lineatus é de grande importância comercial na região dos rios Grande, Pardo e Mogi-Guaçu e tem como característica a formação de grandes cardumes, apta a desenvolver amplos deslocamentos migratórios. O presente trabalho objetivou avaliar, por meio das características morfométricas e etária, se os curimbatás (P. lineatus) dos diferentes estoques migradores e residentes constituem uma única população, havendo interação entre as sub-populações no período de piracema (migração reprodutiva). Utilizou-se um delineamento inteiramente casualizado em esquema fatorial 4 x 2, com quatro tipos de estoques (um residente e três migradores) e dois sexos (macho e fêmea) com trinta repetições, considerando cada peixe como unidade experimental. Foi observada variação de 80,19% para o primeiro componente principal e 8,09% do segundo componente principal fornecida pelas dez variáveis morfométricas dos estoques residentes e migradores. O estoque residente correspondeu aos maiores valores para todas as variáveis morfométricas. Houve sobreposição dos escores individuais das mesmas características entre os estoques migradores. Observou-se predominância de machos entre os estoques residentes e migrador I e II. As semelhanças morfométricas verificadas entre os estoques migradores indicam tratar-se de uma única população, com pequenas variações interpopulacional.

Amostragem foliar da bananeira 'Prata-Anã

Para diagnose nutricional da bananeira, é necessário padronizar a amostragem do tecido a ser utilizado, já que a composição mineral varia com a idade da planta, com a folha amostrada, entre as diversas partes da folha, ao que se somam as condições ecológicas, diferenças varietais e flutuações sazonais dos elementos. Portanto, a possibilidade de equívoco na interpretação é considerável. O Método de Amostragem Internacional de Referência (MEIR) para bananeira recomenda coletar a terceira folha de plantas com cachos que apresentem todas as pencas visíveis e não mais que três mãos de flores masculinas abertas, retirando-se a metade interna de uma faixa central do limbo, desprovida da nervura central. Há uma dificuldade em seguir tal recomendação para bananeira 'Prata-Anã' cultivada no norte de Minas Gerais, pois ela possui porte alto e roseta foliar muito densa, que confunde a localização da folha amostrada. Além disso, normalmente, as amostras são retiradas com largura diferente dos 10 cm recomendados. Dadas as dificuldades de amostragem da bananeira 'Prata-Anã' e o fato de besta cultivar sob irrigação ser pouco estudada, comparada àquelas do subgrupo Cavendish, o presente trabalho objetivou determinar o efeito da folha amostrada e da largura da amostra sobre os teores minerais de bananeira 'Prata-Anã' cultivada sob irrigação no norte de Minas Gerais. Apesar das variações estatísticas, os teores foliares mantiveram-se dentro da faixa de suficiência, independentemente da posição da folha amostra da- 2ª, 3ª ou 4ª folha - ou do tamanho da amostra - 10; 20 ou 30 cm de largura. Isto sugere que a coleta de folha na posição acima (segunda) ou abaixo (quarta) da folha recomendada terceira, numa largura foliar de 10 a 30 cm, pouco altera os teores foliares em relação à indicação pelo método MEIR, tolerando-se assim uma possível variação da amostra quanto à posição e à largura foliar testadas.