Oil production from EOR and waterflood processes supplies a considerable amount of the world's oil production. Therefore, the screening and selection of the best EOR process becomes important. Numerous steps are involved in evaluating EOR methods for field applications. Binary screening guides in which reservoirs are selected on the basis of reservoir average rock and fluid properties are consulted for initial determination of applicability. However, quick quantitative comparisons and performance predictions of EOR processes are more complicated and important than binary screening that are the objectives of EOR forecasting. Forecasting (predicting) the performance of EOR processes plays an important role in the study, design and selection of the best method for a particular reservoir or a collection of reservoirs. In EOR forecasting, we look for finding ways to get quick quantitative results of the performance of different EOR processes using analytical model/s before detailed numerical simulations of the reservoirs under study. Although numerical simulation of the reservoirs is widely used, there are significant obstacles that restrict its applicability. Lack of necessary reservoir data and time consuming computations and analyses can be barriers even for history matching and/or predicting EOR/waterflood performance of one reservoir. There are different forecasting (predictive) models for evaluation of different secondary/tertiary recovery methods. However, lack of a general purpose EOR/waterflood forecasting model is unsatisfactory because any differences in results can be caused by differences in the model rather than differences in the processes. As the main objective of this study, we address this deficiency by presenting a novel and robust analytical-base general EOR and waterflood forecasting model/tool (UTF) that does not rely on conventional numerical simulation. The UTF conceptual model is based on the fundamental law of material balance, segregated flow and fractional flux theories and is applied for both history matching and forecasting the EOR/waterflood processes. The forecasting model generates the key results of isothermal EOR and waterflooding processes including variations of average oil saturation, recovery efficiency, volumetric sweep efficiency, oil cut and oil rate with real or dimensionless time. The forecasting model was validated against field data and numerical simulation results for isothermal EOR and waterflooding processes. The forecasting model reproduced well (R2> 0.8) all of the field data and reproduced the simulated data even better. To develop the UTF for forecasting when there is no injection/production history data, we used experimental design and numerical simulation and successfully generated the in-situ correlations (response surfaces) of the forecasting model variables. The forecasting model variables were proven to be well correlated to reservoir/recovery process variables and can be reliably used for forecasting. As an extension to the abilities of the forecasting model, these correlations were used for prediction of volumetric sweep efficiency and missing/dynamic pore volume of EOR and waterflooding processes. / text

Vibration generated from various sources (engine, road surface, tires, exhaust, etc.) should be considered in the design of a car body. These vibrations travel through transfer systems (drivetrain, suspension, body, etc.) to the steering wheel, seats and other areas where it is detected by the passengers of the vehicle. Transmission routes must be studied and efforts made to keep transfer systems from amplifying vibration and to absorb it instead. Since the superior vibration transfer system is the car body, finite element analysis and experimental vibration analysis are performed on car body-in-white. Body vibration analysis entails understanding and improving the body&rsquo / s dynamic characteristics that act as vibration transfer channels. In the previous study, a finite element model has been created for a car body-in-white available in Automotive Laboratory (Mechanical Engineering Department, Middle East Technical University, Ankara) and its natural frequencies and mode shapes have been determined using finite element analysis software. In this study, vibration tests have been performed on actual car body-in-white. Frequency response functions between 34 response locations and force application point have been measured. Using these frequency response functions, natural frequencies and mode shapes of the body-in-white have been determined. Finite element analysis and experimental results have been compared to evaluate the finite element model reliability.

Made available in DSpace on 2015-03-26T13:30:27Z (GMT). No. of bitstreams: 1 texto completo.pdf: 6083054 bytes, checksum: 0c926b8830bf109aea4cf3a77c1bcbba (MD5) Previous issue date: 2009-04-28 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The sandfly are diseases caused by protozoa, intracellular binding, plagued heteroxenic, pathogenic to humans, belonging to the genus Leishmania Ross,.These are considered serious human protozoan public health problems worldwide, affecting indiscriminately men, women and children, causing different clinical manifestations. Its distribution reaches the tropical and subtropical regions of America, Africa, Asia, Europe. According to the World Health Organization (WHO), we observed the occurrence of this disease in 88 countries, of which 16 are developed. Currently it is estimated there, worldwide, around 350 million people in areas at risk of both leishmaniasis (WHO, 2006). In the Americas, the visceral and cutaneous leishmaniasis, have wide distribution, with records of cases from the extreme south of the United States to northern Argentina, with the exception of Chile and Uruguay. The visceral leishmaniasis occurs from Mexico to Argentina, however, was not registered yet, Uruguay, in the Andean countries, Chile, Peru, Ecuador, and northern South America, French Guiana, Guyana and Suriname (LAISON & Shaw, 1998). In the Brazilian territory, the leishmaniasis are included in the list of diseases that make up the Schengen Information System Diseases of Compulsory Notification (SNDC), and Brazil considered the country with the highest prevalence of these. / Os flebotomíneos, vetores das leishmanioses, são identificados e classificados pela morfologia dos insetos adultos, existindo poucos conhecimentos de caracteres das formas imaturas. Das 500 espécies Neotropicais descritas, somente 66 espécies tem suas formas imaturas estudadas. Visando avaliar a importância de alguns caracteres taxonômicos dos estádios imaturos de flebotomíneos, estudos morfológicos foram realizados em Lutzomyia (Nyssomia) intermedia e L. (N.) neivai, transmissores de Leishmania (V.) braziliensis, de populações procedentes dos Estados do Rio de Janeiro e São Paulo, que durante alguns anos estiveram em sinonímia e têm apontado certo grau de introgressão. Em L. (N.) neivai pode-se observar um maior número de tubérculos formando uma ou mais fileiras, quando comparados aos observados no exocórion de L. (N.) intermedia. Em características gerais, as larvas, das duas espécies, apresentaram-se bastante semelhantes. Porem, as larvas do primeiro estádio revelaram diferenças significativas com relação aos outros estádios evolutivos, destacando a presença de egg buster, o tamanho das antenas e o número de cerdas caudais. O uso destes caracteres não se traduziu em uma boa ferramenta para separação das espécies objeto do nosso estudo.

Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2017-12-22T14:07:13Z No. of bitstreams: 1 nelioalvesdoamaralfilho.pdf: 3229871 bytes, checksum: c82c698f342f6b908377149e4abe130a (MD5) / Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: Favor corrigir autor: Autor(es): Filho, Nélio Alves do Amaral Favor verificar no Lattes se Araúno tem ou não acento Primeiro Orientador: Araujo, Débora Rosana Ribeiro Penido Co-orientador: Araujo, Leandro Ramos de on 2018-01-22T18:24:16Z (GMT) / Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-22T18:28:56Z No. of bitstreams: 1 nelioalvesdoamaralfilho.pdf: 3229871 bytes, checksum: c82c698f342f6b908377149e4abe130a (MD5) / Rejected by Adriana Oliveira (adriana.oliveira@ufjf.edu.br), reason: Favor corrigir: Autor(es): Filho, Nélio Alves do Amaral Verificar se os sobrenomes Araújo tem ou não acento on 2018-01-24T12:13:21Z (GMT) / Submitted by Geandra Rodrigues (geandrar@gmail.com) on 2018-01-24T12:29:33Z No. of bitstreams: 1 nelioalvesdoamaralfilho.pdf: 3229871 bytes, checksum: c82c698f342f6b908377149e4abe130a (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-01-24T13:46:23Z (GMT) No. of bitstreams: 1 nelioalvesdoamaralfilho.pdf: 3229871 bytes, checksum: c82c698f342f6b908377149e4abe130a (MD5) / Made available in DSpace on 2018-01-24T13:46:23Z (GMT). No. of bitstreams: 1 nelioalvesdoamaralfilho.pdf: 3229871 bytes, checksum: c82c698f342f6b908377149e4abe130a (MD5) Previous issue date: 2017-11-24 / Este trabalho propõe a apresentação e o desenvolvimento computacional de um algoritmo para solução de fluxo de potência em sistemas de distribuição baseado no método Backward Forward Sweep (BFS). No algoritmo foram consideradas as principais etapas do método tradicional e algumas estratégias propostas isoladamente em trabalhos na literatura. Além disso, propõe-se a incorporação da representação do acoplamento eletromagnético entre alimentadores em paralelo nos modelos de linhas, e estudos do impacto dessa representação nos cálculos de fluxo de potência usando o BFS. Apresenta-se também, de maneira detalhada, uma maneira de implementar o controle de tape dos reguladores de tensão no método BFS. Tais questões são normalmente negligenciadas ou não são explicitadas nos trabalhos encontrados na literatura que envolvem o método analisado. Análises detalhadas do método BFS também são realizadas e apresentadas neste trabalho. Evidências analíticas são desenvolvidas para sustentar essas análises, bem como os resultados obtidos. Neste trabalho também é feita uma comparação entre o método BFS desenvolvido e um método baseado em Newton-Raphson para solução de sistemas de distribuição. As análises realizadas têm como foco principal a investigação do comportamento desses métodos quando são levados a operar em pontos considerados críticos para convergência. Para isso, são analisados fatores como a variação da relação X/R, o aumento do carregamento, o impacto da modelagem de carga (modelo ZIP) e o impacto da presença dos reguladores de tensão. / This work proposes the presentation and the computational development of an algorithm for power flow solution in distribution systems based on the Backward Forward Sweep (BFS) method. The algorithm contains the main steps of the traditional method and some strategies proposed separately in works in the literature. In addition, it is proposed the incorporation of the representation of the electromagnetic coupling between feeders in parallel in the line models, and studies of the impact of this representation in the power flow calculations using the BFS. A way to implement the tape control of the voltage regulators in the BFS method is also presented in detail. Such questions are usually neglected or not deeply explained in the works found in the literature that involve the analyzed method. A detailed analyzes of the BFS method are also performed and presented in this work. Some analytical evidence is developed to support these analyzes, as well as the results obtained. In this work a comparison is also made between the developed BFS method and a Newton-Raphson-based method for the distribution systems solution. The analyzes made have as main focus the investigation of the behavior of these methods when they are taken to operate in points considered critical for convergence. For this, factors such as the variation of the X/R ratio, the load’s increase up, the impact of the load modeling (ZIP model) and the impact of the presence of the voltage regulators are analyzed.

Medimos a acuidade visual em crianças com paralisia cerebral do tipo espástica, classificadas em tetraplégicas, diplégicas e hemiplégicas, de acordo com o seu prejuízo motor, pelo método dos potenciais visuais evocados de varredura. Encontramos uma redução na acuidade visual em todos as crianças com tetraplegia e diplegia e em 94% das crianças com hemiplegia. Ambliopia foi identificada em 16% das crianças. Uma alta correlacão entre o prejuízo motor e a redução da acuidade visual foi encontrada para todas as classes. Concluímos que a acuidade visual está reduzida na paralisia cerebral espástica e que esta é de origem cortical, uma vez que o exame oftalmológico de todas as crianças era normal. / We measured the visual acuity in children with spastic cerebral palsy classified as tetraplegic, diplegic and hemiplegic according to their motor impairment by the sweep visual evoked potential method. We found a reduction in the visual acuity of all tetraplegic and diplegic and in 94% of the hemiplegic children. Ambliopia was found in 16% of children. A high correlation was found between the motor impairment and the reduction in the visual acuity. We conclude that the visual acuity was reducted in the spastic cerebral palsy and the origins are presumed to be cortical since the ophthalmological exam in all children was normal.

Structural Health Monitoring (SHM) techniques are widely used in a number of Non – destructive Evaluation (NDE) applications. There is a need to develop effective techniques for SHM, so that the safety and integrity of the structures can be improved. Two most widely used SHM methods for plates and rods use either the spectrum of the impedances or monitor the propagation of lamb waves. Piezoelectric wafer – active sensors (PWAS) were used for excitation and sensing. In this study, surface response to excitation (SuRE) and Lamb wave propagation was monitored to estimate the integrity of the round objects including the pipes, tubes and cutting tools. SuRE obtained the frequency response by applying sweep sine wave to surface. The envelope of the received signal was used to detect the arrival of lamb waves to the sensor. Both approaches detect the structural defects of the pipes and tubes and the wear of the cutting tool.

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There is a pressing need for creative new data analysis methods whichcan sift through scientific simulation data and produce meaningfulresults. The types of analyses and the amount of data handled by currentmethods are still quite restricted, and new methods could providescientists with a large productivity boost. New methods could be simpleto develop in big data processing systems such as Apache Spark, which isdesigned to process many input files in parallel while treating themlogically as one large dataset. This distributed model, combined withthe large number of analysis libraries created for the platform, makesSpark ideal for processing simulation output.Unfortunately, the filesystem becomes a major bottleneck in any workflowthat uses Spark in such a fashion. Faster transports are notintrinsically supported by Spark, and its interface almost denies thepossibility of maintainable third-party extensions. By leveraging thesemantics of Scala and Spark's recent scheduler upgrades, we forceco-location of Spark executors with simulation processes and enable fastlocal inter-process communication through shared memory. This provides apath for bulk data transfer into the Java Virtual Machine, removing thecurrent Spark ingestion bottleneck.Besides showing that our system makes this transfer feasible, we alsodemonstrate a proof-of-concept system integrating traditional HPC codeswith bleeding-edge analytics libraries. This provides scientists withguidance on how to apply our libraries to gain a new and powerful toolfor developing new analysis techniques in large scientific simulationpipelines.

The process of removing snow from the streets of cities in an optimal way can pose quite a challenge. In order to optimize the path of the snow removing vehicle, the city can be translated into a graph with nodes as crossings and links as roads. Once the city is modelled as a graph, all nodes with degree one can be eliminated and the snow removal time is added to the closest node. An optimization problem can then be solved in order to find a vehicle path in this reduced graph. The purpose of this thesis is to give an algorithm to reconstruct the reduced graph and then dictate the proper vehicle path in this reconstructed graph. The algorithm is constructed by reversing the node elimination process, piecing together the original graph and traversing the graph to get information about what to do on the eliminated links and nodes. The obtained algorithm is presented in this thesis.

Sensitive nonlinear acoustic methods are suitable for material characterization. This thesis describes three nonlinear acoustic methods that are proven useful for detection of defects like cracks and delaminations in solids. They offer the possibility to use relatively low frequencies which is advantageous because attenuation and diffraction effects are smaller for low frequencies. Therefore large and multi-layered complete objects can be investigated in about one second. Sometimes the position of the damage is required. But it is in general difficult to limit the geometrical extent of low-frequency acoustic waves. A technique is presented that constrains the wave field to a localized trapped mode so that damage can be located.