Purificação do brometo de tálio pelo refino zonal e análise da segregação das impurezas

Desde o conhecimento da radiação e seus efeitos a necessidade de mensurá-la intriga os cientistas. Os detectores de radiação mais difundidos atualmente fazem o uso de cristais semicondutores. Porém, esses detectores tem uma temperatura ótima de funcionamento que acaba sendo ultrapassada, já que o processo gera calor. Por isso, o resfriamento acaba sendo uma necessidade. O desenvolvimento de detectores de radiação com cristal semicondutor que opere a temperatura ambiente é tema de muitos estudos, já que evitaria o processo de resfriamento, trabalhoso e de alto custo. No Centro de Tecnologia das Radiações (CTR) do Instituto de Pesquisas Energéticas e Nucleares (IPEN) o sal de Brometo de Tálio (TlBr) é estudado para esta finalidade. Até ser um cristal semicondutor este sal deve passar por vários processos, entre eles o de purificação e o de cristalização. A técnica utilizada para purificar este cristal é a de Refino zonal. Após ser purificado por esta técnica o sal estará apto a ser cristalizado e consequentemente integrar um equipamento de detecção de radiação. Portanto, esta monografia teve como objetivo realizar a análise da segregação das impurezas do sal de TlBr através da técnica de espectroscopia de massa em fonte de plasma induzido (ICP-MS) e espectroscopia de emissão atômica (ICP-AES). Determinando assim se o mesmo está apto a ser cristalizado e vir a compor um detector de radiação

Interface para classificação de dados por máquinas de vetores de suporte

In this project the Pattern Recognition Problem is approached with the Support Vector Machines (SVM) technique, a binary method of classification that provides the best solution separating the data in the better way with a hiperplan and an extension of the input space dimension, as a Machine Learning solution. The system aims to classify two classes of pixels chosen by the user in the interface in the interest selection phase and in the background selection phase, generating all the data to be used in the LibSVM library, a library that implements the SVM, illustrating the library operation in a casual way. The data provided by the interface is organized in three types, RGB (Red, Green and Blue color system), texture (calculated) or RGB + texture. At last the project showed successful results, where the classification of the image pixels was showed as been from one of the two classes, from the interest selection area or from the background selection area. The simplest user view of results classification is the RGB type of data arrange, because it’s the most concrete way of data acquisition

O uso de software para estudo de seletividade e coordenação

The present work aims to prepare a study of selectivity and coordination in an isolated electrical system with the aid of computer software PTW (Power Tools for Windows). Based on appropriate protection standards, on equipment data and the survey of the curves of “time versus current” (Time Current Curve – TCC), may be defined protection settings to leave the system selective, coordinated and properly protected. Definitions of adjustments are made taking into account the data of, so called, thermal curves of the equipment, which take into account the rated current and the supportability of short-circuit current of the equipment and cables involved in the installation in question. For that we use the tools provided by the PTW in which an industrial electrical circuit is simulated, presenting and discussing the results. With that validates the software PTW, taking it as a great tool helper implementation the coordination and selectivity study

Recebimento de dados GNSS via Internet em RTCM 3 e conversão para RINEX utilizando a plataforma J2ME

Changes are occurring worldwide, including the area of positioning using Global Navigation Satellite Systems in mobile devices such as mobile phones or laptops. This is due to the great improvement and availability of Internet services to these mobile devices. The accuracy and speed of data transmission for these devices makes the technology of sending / receiving data via an internet targeted for optimization. The optimization could allow obtaining, in real-time, coordinates (latitude, longitude and altitude) of suitable quality for users of GPS (Global Positioning System) devices that have wireless Internet access, such as those used to control the eet, locomotion, navigation, agriculture, etc. . The use of the protocol NTRIP (Networked Transport of RTCM via Internet Protocol) in GPS applications is growing every day. Applications are available in C, which creates an opportunity for development with a focus on multiplatform environments. In this context, we propose an application, implemented in a multiplatform environment and the use of NTRIP, able to run on a mobile device for receiving GNSS data

Seleção de fornecedores em uma indústria de transformadores utilizando o método de análise hierárquica

The optimal supply chain management (SCM) is considered by the companies a new frontier in order to gain efficiently competitive advantage. Through the SCM companies must define their competitive strategies by positioning inside the supply chain wich belongs both as suppliers and as consumers. The main objectives of SCM is integrate multiple suppliers to satisfy the market demand and make possible the synergies between the parts of the supply chain in order to better serve the consumer Meanwhile, selection, evaluation and development of suppliers play important roles in establishing an efficient supply chain. Thus, the SCM covers elements such as manufacturing, assembly, raw materials, and distribution to the final consumer. Due to the factors described, the focus of this paper is to present the Analytic Hierarchical Process (AHP) application as an appropriate and structured method for the supplier selection of a strategic line of low voltage transformers of a transformers industry and compare it with the selection process currently used by this industry, showing the advantages of applying a multiple criteria decision making method. In this study, the research methodology used was modeling and simulation

Estudo da interação não-nativa no enovelamento de proteínas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Leuconostoc mesenteroides SJRP55 isolada de mussarela de búfala: perfil probiótico e bacteriocinogênico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Incorporação de novas tecnologias no setor sucroalcooleiro: produção de hidrogênio e aumento da oferta de eletricidade

This work studies the incorporation of new technologies in the sugarcane sector. Are considered the ethanol steam reforming and the gasification of sugarcane bagasse(by-product) processes associated with combined cycle systems (Gas Turbine + Steam Turbine), aggregating hydrogen production and increased electricity supply in the sector, respectively. To verify the technical feasibility of the incorporation processes was performed a thermodynamic analysis, considering data from a typical Brazilian Sugar Cane Industry. In another step the economic viability study of the hydrogen production process was made, with consideration on hydrated and anhydrous ethanol steam reform, comparing the cost of hydrogen production. Also considered studies of economic engineering of the gasification process and the generation of electricity associated. As conclusions, it follows that the ethanol steam reforming is a great alternative for hydrogen production, presenting production cost relatively low, especially when is considered the steam reforming of hydrated ethanol. For the gasification process associated with combined cycle, can be observed an increase of 8.56 times of the electricity production in the sugar cane industry, indicating a positive annual saving when the sales price of the supply electricity is greater than 0.070 US$/kWh. Finally it can be concluded that the incorporation of these new processes allow greater profitability and operational flexibility of Brazilian sugarcane mills

Alocação de modem PLC utilizando SNR em uma rede elétrica de baixa tensão

Pós-graduação em Engenharia Elétrica - FEIS

O Processo de estrangeirização da Terra no Brasil: estudo de caso da empresa Umoe Bioenergy no município de Sandovalina (SP)

From the agri-food crisis of 2007/2008, we live an intensifying period in the global land rush. The land grabbing is analyzed as a process that occurs on a global scale, especially to countries in Africa and Latin America, the main targets of the current global competition for land, because beyond the earth have low prices and the legislation be flexible, low and ineffective supervision of the state (especially in the issue of environmental and labor laws), also have vast tracts of arable land, with fertile soils and high availability of water resources (the latter element has become relevant in that case analysis). In addressing the land foreignization in the XXI century it is necessary to speak about the issue of biofuels and bioenergy, since it is these that define the current phase of land foreignization in Brazil. In the 1970s occurred the first incentive to produce ethanol in the sugarcane cultivation, with the policy of the National Alcohol Program (PROALCOOL). From the 2000s this interest again sharpened up and foreign capital began to see in Brazil a great opportunity for a production facility and purchase of old agro-processing plants that were implanted in PROALCOOL period but who were disabled. This is the case of Umoe Bioenergy, Norwegian company that in 2006 started its production in the municipalities of Narandiba and Sandhurst, located in the Pontal do Paranapanema region that, in turn, is the region of São Paulo with larger agrarian conflicts, settlements land reform, land grabbing and high poverty rates...

Avaliação da liberação sustentada de fármaco e nanopartícula utilizando membranas de látex natural como carreador

Pós-graduação em Biotecnologia - IQ

Produção e caracterização das Tanases do fungo filamentoso Aspergillus carbonarius

Pós-graduação em Biotecnologia - IQ

Aplicação de técnicas metaheurísticas para resolver o problema de coordenação de carregamento de veículos elétricos em sistemas de distribuição

Pós-graduação em Engenharia Elétrica - FEIS

Modelo matemático para o controle ótimo de Volt/VAr em sistemas de distribuição de energia elétrica trifásicos

Pós-graduação em Engenharia Elétrica - FEIS

Produção de fitase por Rhizopus microsporus var. microsporus: purificação, caracterização bioquímica e aplicação

Pós-graduação em Biotecnologia - IQ