Aplicação de painéis fotovoltaicos em residências: estudos de caso em Guaratinguetá e Sevilha (Espanha)

In this paper we discussed the possibility of installing a photovoltaic panel in a house in order to reduce electrical consumption. Brazil is a country with a huge solar resource and photovoltaic technology allows transforming solar energy into electricity, helping to decentralize energy production. To enlarge the field of view, the study compares with the equivalent in a Spanish city, discussing how the law favors the initiative of using this type of energy. It will be seen that, with the encouragement of the government, the project can be done because the installation is amortized over a reasonable period of time, about eight years in Spain and three in Brazil

Reformas estruturais no Brasil na década de 1990 e seu impacto sobre o emprego

O país passou por um período de grandes transformações no último quarto do século XX, os quais afetaram em grande medida a esfera social, política e econômica da sociedade. Dado o enfraquecimento do Estado de Bem Estar Social, e a ascensão do pensamento neoliberal nos anos 1970, houve a revisão do papel do Estado em todo o globo. As reformas neoliberais durante a década de 1990 tiveram um impacto significativo sobre os níveis do produto, e refletiram na redução do emprego até o fim da década, além do surgimento de novas formas de precarização do trabalho. Este trabalho tem como principal objetivo elucidar o impacto destas reformas estruturais sobre o emprego e seus desdobramentos na sociedade

Análise geoestatística da variabilidade espacial do acabamento com tingidor em painéis de madeira colada lateralmente

Classical statistical techniques which necessarily assume that all sampling units are random and independent were always used in the timber industry. Geostatistics considers that certain phenomena are characterized by spatial dependence: values of sampling units closer to each other tend to be more similar than values of sampling units farther away. This study aimed to characterize the spatial variability of the finishing (dyer) in the upper and lower surfaces of four edge glued panels by using geostatistical methods using geoR. Semivariograms were constructed for the analysis of spatial dependence. The spherical mathematical model was the best fit to the semivariograms generated, and was done the interpolation of the data (kriging) in samples where the distribution of dyer presents spatial dependence. In the bottom surfaces of two panels where the spatial dependence was detected geostatistical methods characterized a very large spatial variability due to the heterogeneous application of the finishing

Análise dos efeitos das deformações estruturais sobre a transferência transversal de carga em um veículo do tipo fórmula SAE submetido a uma aceleração lateral constante

This paper studies the frame deformations on a formula SAE vehicle in steady-state cornering and its influence on the lateral load transfers and, consequently, on the tires normal loads due to the applied lateral load. For a vehicle with a perfect rigid frame, the vehicle mass, the position of the center of gravity and the suspensions are the only factors responsible for the load distribution between the tires. When the frame deformations are no longer negligible, the frame deformations affect the loaddistribution between the tires. The frame flexibility turns it able to behave as an additional set of springs to the suspension system, thus changing the behavior of the set. This paper describes howit happens and suggests ways to minimize this phenomenon

Caracterização físico-mecânica de elementos estruturais roliços perfilados de Amaru

The study of physical and mechanical properties of wood is essential for its structural use and it is of great importance to the construction industry. Thus, this study aimed to determine the physical and mechanical properties of the wood Amaru - a hybrid of Eucalyptus, developed by Plantar Projects and Forest Products Ltda. In order to determine the properties of Amaru, round samples were used, which were provided to the Laboratory of Wood and Wooden Structures of the School of Engineering of São Carlos, University of São Paulo - LaMEM / EESC / USP. For the characterization of the physical properties, the apparent specific gravity and moisture content of the samples were determined. To the mechanical characterization, the following properties were evaluated: strength and stiffness in compression, strength and stiffness in bending, shear and tension. The procedures of the tests performed in this study were done according to the recommendations of the Brazilian Wood Standard ABNT NBR 7190:1997. The specimen used were confectioned in actual dimensions, according to as those used in the construction system proposed by Plantar. The results obtained from the tests performed showed that the mechanical properties approached the values proposed by the Wood Standard NBR 7190. The visual grading was important to provide a primary idea about the failure modes to be obtained from the tests performed. The bending test showed the modulus of elasticity (MOE) and Modulus of Rupture (MOR), which resulted in 15822 MPa and 101,7 MPa, respectively. The compression test resulted in values Ec0,m and fc0, 15698 MPa and 50,7 MPa. The tensile strength (ft0) of this hybrid was calculated and its value obtained was 60,8 MPa. The shear strength (fv0) was 8,2 MPa. The results obtained from the tests are the basis for engineers and architects to design structures using wood species Amaru

Estudo da influência das resinas termofixas uréia formaldeído (UF) e melamina formaldeído (MF) nas características físicas e mecânicas de painéis MDF

Thermosetting resins are very important in the production of MDF panels. They act as an adhesive in the process of compacting and consolidating the fiberboard. Thermoset resins commonly used in this process are based resin urea formaldehyde (UF) and melamine formaldehyde (MF). The first has a higher demand due to its low cost and good performance in meeting the specifications and standards. The second has a high cost compared to MF resin, but adds greater value to the MDF panel, because it gives greater moisture resistance. The process of manufacture of MDF boards was briefly presented in this study to facilitate the understanding of the work. Samples of thermosetting resins (UF and MF) were subjected to physical-chemical seeking to relate these results to the technological performance presented by their respective samples of MDF boards. Two other samples of MDF panels were subjected to physical and mechanical tests. Results were analyzed and related to the award of their respective thermoset resin. Instruments like Dahmos Trend Manager ® and Grecon Dax 5000 and TG - DSC analysis were used in this study to assist in the analysis of the results. It was observed that the results of the analysis of thermosetting resins were within the specified. Such resins do not directly influence the technological tests provided by the MDF panels, but it has been found that the process variables such as humidity and fiber production rate interfere with the performance of the resin accelerating the reaction and therefore their influence on the physical-mechanical properties of the panels MDF. Samples of MDF panels with UF and MF met all the specifications required by the Brazilian standard with regard to the technological quality. The increased demand for UF resin market is justified by the service specifications...

Concentração de tensões em peças e componentes estruturais - uma abordagem através do método dos elementos finitos

Any failure process that may occur in a part probably is located where the stress exceeded the level of resistance. When a part or component has a sharp change in geometry, such as slots, holes, grooves, bumps or other irregularities, there is an increased concentration of stress at a specific location of the part. The objective of this study is to determine the maximum stresses in structural parts and components using the equations of elasticity theory in conjunction with the stress concentration factor experiment and compare them with results obtained by finite element method

Aspectos florísticos e estruturais da família Myrtacea na floresta Ombrófila Densa Submontana (Parque Estadual Serra do Mar - Núcleo Picinguaba, Ubatuba - SP)

Com base nas coletas realizadas em quatro parcelas de um hectare (Designadas pelas letras B, C, D e E localizadas no Núcleo Picinguaba, município de Ubatuba, São Paulo, foi levantada uma base de dados florísticos e fitossociológicos para a família Myrtaceae. Todas as parcelas situam-se em área de ocorrência de Floresta Ombrófila Densa e estão inseridas no Projeto Temático “Composição florística, estrutura e funcionamento da Floresta Ombrófila Densa dos Núcleos Picinguaba e Santa Virgínia do Parque Estadual da Serra do Mar” do Programa BIOTA-FAPESP. O estudo teve como objetivo investigar a influência de Myrtaceae na constituição estrutural e diversidade do componente arbóreo no trecho florestal amostrado. No total foram amostradas 66 espécies para a família, distribuídas em 9 gêneros, sendo que Eugenia foi o gênero de maior riqueza. A parcela B foi a que mais apresentou espécies de Myrtaceae. Dos 4750 indivíduos contemplados, Myrtaceae contribuiu com 861, sendo precedida apenas por Rubiaceae com 922 indivíduos; A parcela E concentrou o maior número deles (223); Da área basal total 106,17 m², Myrtaceae contribui com 16,16 m². Apareceu com frequência absoluta entre 85% e 90% nas quatro parcelas, totalizando 87,5% nos 4 ha. Apresentou diâmetro e altura média de 12,73 cm e 8,17m respectivamente. Foi a família mais importante em todas parcelas (VI), apresentando valor de importância de 15,24% quando calculado para a somatória das quatro parcelas. O índice de Shannon calculado para parcela B, C, D, E e total foi 4,12 nats/ind; 3,98 nats/ind; 4,00 nats/ind; 4,06 nats/ind; 4,23 nats/ind respectivamente. A equabilidade foi 0,82; 082; 0,79; 0,82; 0,76 respectivamente. Para as espécies de Myrtaceae, Marlierea obscura destacou-se em primeiro lugar quanto ao número de indivíduos (83), frequência absoluta (18,5%), dominância absoluta (0,46), sendo assim... (Resumo completo, clicar acesso eletrônico abaixo)

Efeito de Técnicas Osteopáticas Estruturais na Postura e Flexibilidade de Individuos com Escoliose Idiopática do Adolescente

Pós-graduação em Fisioterapia - FCT

Caracterização de cerâmicas a base de nitreto de silício para aplicações estruturais

The need for development of new materials is a natural process in the companies’ technological point of view, seeking improvements in materials and processes. Specifically, among the materials, ceramic exhibit valuable properties, especially the covalent ceramics which have excellent properties for applications which requires the abrasion resistance, hardness, high temperatures, resistence, etc. being a material that has applications in several areas. Most studies are related to improvement of properties, specially fracture toughness that allows the expansion of its application. Among the most promising ceramic materials are silicon nitride (Si3N4) which has excellent properties. The goal of this work was the development and caracterization of Si3N4-based ceramics, doped with yttrium oxide (Y2O3), rar earth concentrate (CTR2O3) and cerium oxide (CeO2) in the same proportion for the evaluation of properties. The powders' mixtures were homogenized, dried and compressed under pressure uniaxial and isostatic. Sintering was carried out in 1850 ⁰C under pressure of 0,1MPa N2 for 1 h with a heating rate of 25 ⁰C / min and cooling in the furnace inertia. The characterizations were performed using Archimedes principle to relative density, weight loss by measuring before and after sintering, phase analysis by X-ray diffraction, microstructure by scanning electron microscope (SEM), hardness and fracture toughness by the method Vickers indentation. The results obtained showed relative density of 97-98%, Vickers hardness 17 to 19 GPa, fracture toughness 5.6 to 6.8 MPa.m1/2, with phases varying from α-SiAlON and β-Si3N4 depending the types of additives used. The results are promising for tribological applications and can be defined according to the types of additives to be used

Estudos estruturais com a importina-α do fungo Neurospora crassa e sequências de localização nuclear

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

Painéis de Medium Density Fiberboard fabricados com bagaço de cana-de-açúcar e madeira de reflorestamento

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Considerações e avaliações das solicitações em estruturas de edificações de paredes de concreto pré-moldado utilizando o modelo de pórtico tridimensional: estudo de caso

The present study is in reference to precast concrete (panels) walls as the main structural system. The diversification of the structural systems is a reality due to specific characteristics', as a result there is a lack of study and analysis. Some systems are already established in their applications, for instance: conventional reinforced concrete, structural masonry, metal structures, and wood structure. Apart from this precast concrete elements has had a growth in building sites in Brazil, therefore professionals should be more aware. Affordable house funding initiatives to address the housing shortage has been recurrent throughout the country, additionally precast concrete walls has been an alternative that meets the three basic concepts of engineering, which are: the technique, economy, and security. The objective of this study is to gather concepts from the literature and TOMO (2012) about precast concrete walls and make a didactic synthesis of how they are viewed. The modeling structure method of the system was performed following the concept of assigning bars, using the computer program of calculations SAP2000. Initially will be presented a theoretical part, furthermore a case study to illustrate the sizing of the walls using EXCEL tables programmed with calculation routine. The results will be presented in calculated efforts by the program for further analysis. Finally, will be highlighted important items of modeling and interpretation of the results

Derivados estruturais do peptídeo Histatina-5: síntese e aplicação no tratamento de candidose bucal

O uso contínuo de antifúngicos tópicos e sistêmicos no tratamento convencional de candidose oral tem resultado no aparecimento de Candida albicans resistente. Por este motivo, novas tecnologias para o desenvolvimento de drogas, como os biofármacos, constituem uma estratégia, além de inovadora devido a seu mecanismo de ação, também promissora no campo da biotecnologia. Verificou-se que esta nova tecnologia possui potencial efeito em diminuir a resistência de microrganismos, especialmente do agente etiológico da candidose bucal. A Candida albicans, agente patológico de origem fúngica, expressa diversos fatores de virulência sendo comumente encontrada na pele, cavidade oral, esôfago, trato gastrointestinal e órgão reprodutor feminino podendo acometer pessoas de idades variadas, imunologicamente comprometidas, ou que utilizam próteses dentárias. Nesse sentido, peptídeos com efeito antifúngico, produzidos por plantas, animais e microrganismos estão sendo utilizados como modelos para o desenvolvimento de novas drogas com aplicações em saúde. A Histatina 5 é um peptídeo encontrado na saliva humana com forte propriedade fungicida in vitro. Este peptídeo é extremamente rico nos aminoácidos histidina e lisina e, em pH fisiológico, possui potencial de inibição da formação do biofilme de Candida albicans, podendo ser aplicado portanto, no tratamento da candidose oral. Nesse contexto, o presente estudo consiste na obtenção de análogos da Histatina-5 com modificações em sua estrutura molecular, com o objetivo de otimizar o seu potencial terapêutico já verificado nos peptídeos da família das Histatinas. A Histatina 5SC possui o aminoácido serina C-terminal substituído pela cisteína, o qual é constituído pelo grupo sulfidrila em sua cadeia lateral, para a formação de dímeros. Os peptídeos foram desenvolvidos sinteticamente pelo método de Síntese Orgânica em Fase Sólida, utilizando-se a estratégia Fmoc e...

Mudanças estruturais nas cadeias de valor na indústria do vestuário: um estudo de caso

In the early 1990 Gary Gereffi and Miguel Korzeniewicz published the book Commodity Chains and Global Capitalism. In the two decades prior to the publication, industrialization worldwide, had undergone significant changes, made more segmented and dispersed in certain regions. In the book, the authors produce a new set of categories to analyze the new standards for establishment and operation of global value chains, their organization, the new geography of manufacturing and the role of the countries in this scenario. Today, in the middle of the second decade of this century, world trade has expanded and multiplied continuously throughout this period, encouraged by reducing barriers and national borders promoted by 'peddlers' of this new era. The purpose of this study is to show that retailers are establishing purchasing offices in producing countries - or in nearby regions - to directly hire outsourced production