Academic literature on the topic 'Teslas'

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Journal articles on the topic "Teslas":

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Kemfert, Claudia. "Teslas Paukenschlag — eine Chance für Brandenburg." Wirtschaftsdienst 100, no. 3 (March 2020): 150–51. http://dx.doi.org/10.1007/s10273-020-2588-4.

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Mack, Andreas, Robert Wolff, Stefan Scheib, Marcus Rieker, Dirk Weltz, G. Mack, Hans-Jürg Kreiner, et al. "Analyzing 3-tesla magnetic resonance imaging units for implementation in radiosurgery." Journal of Neurosurgery 102, Special_Supplement (January 2005): 158–64. http://dx.doi.org/10.3171/sup.2005.102.s_supplement.0158.

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Object. The limiting factor affecting accuracy during gamma knife surgery is image quality. The new generation of magnetic resonance (MR) imaging units with field strength up to 3 teslas promise superior image quality for anatomical resolution and contrast. There are, however, questions about chemical shifts or susceptibility effects, which are the subject of this paper. Methods. The 3-tesla MR imaging unit (Siemens Trio) was analyzed and compared with a 1-tesla unit (Siemens Magnetom Expert) and to a 1.5-tesla unit (Philips Gyroscan). Evaluation of the magnitude of error was performed within transverse slices in two orientations (axial/coronal) by using a cylindrical phantom with an embedded grid. Deviations were determined for 21 targets in a slab phantom with known geometrical positions within the stereotactic frame. Distortions caused by chemical shift and/or susceptibility effects were analyzed in a head phantom. Inhouse software was used for data analyses. The mean deviation was less than 0.3 mm in axial and less than 0.4 mm in coronal orientations. For the known targets the maximum deviation was 1.16 mm. By optimizing these parameters in the protocol these inaccuracies could be reduced to less than 1.1 mm. Due to inhomogeneities a shift in the z direction of up to 1.5 mm was observed for a dataset, which was shown to be compressed by 1.2 mm. Conclusions. The 3-tesla imaging unit showed superior anatomical contrast and resolution in comparison with the established 1-tesla and 1.5-tesla units; however, due to the high field strength the field within the head coil is very sensitive to inhomogeneities and therefore 3-tesla imaging data will have be handled with care.
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Mack, Andreas, Robert Wolff, Stefan Scheib, Marcus Rieker, Dirk Weltz, G. Mack, Hans-Jürg Kreiner, et al. "Analyzing 3-tesla magnetic resonance imaging units for implementation in radiosurgery." Journal of Neurosurgery 102 (January 2005): 158–64. http://dx.doi.org/10.3171/jns.2005.102.s_supplement.0158.

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Object.The limiting factor affecting accuracy during gamma knife surgery is image quality. The new generation of magnetic resonance (MR) imaging units with field strength up to 3 teslas promise superior image quality for anatomical resolution and contrast. There are, however, questions about chemical shifts or susceptibility effects, which are the subject of this paper.Methods.The 3-tesla MR imaging unit (Siemens Trio) was analyzed and compared with a 1-tesla unit (Siemens Magnetom Expert) and to a 1.5-tesla unit (Philips Gyroscan). Evaluation of the magnitude of error was performed within transverse slices in two orientations (axial/coronal) by using a cylindrical phantom with an embedded grid. Deviations were determined for 21 targets in a slab phantom with known geometrical positions within the stereotactic frame. Distortions caused by chemical shift and/or susceptibility effects were analyzed in a head phantom. Inhouse software was used for data analyses.The mean deviation was less than 0.3 mm in axial and less than 0.4 mm in coronal orientations. For the known targets the maximum deviation was 1.16 mm. By optimizing these parameters in the protocol these inaccuracies could be reduced to less than 1.1 mm. Due to inhomogeneities a shift in the z direction of up to 1.5 mm was observed for a dataset, which was shown to be compressed by 1.2 mm.Conclusions.The 3-tesla imaging unit showed superior anatomical contrast and resolution in comparison with the established 1-tesla and 1.5-tesla units; however, due to the high field strength the field within the head coil is very sensitive to inhomogeneities and therefore 3-tesla imaging data will have be handled with care.
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Boivin-Le Pottier, G., J. Y. Gauvrit, and B. Carsin-Nicol. "Signal des hématomes intracérébraux à 3 Teslas : évolutivité et particularités." Journal of Neuroradiology 39, no. 1 (March 2012): 42. http://dx.doi.org/10.1016/j.neurad.2012.01.127.

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Job, L., F. Bonnet, S. Perotin, S. Piot-Veron, C. Portefaix, and C. Marcus. "Evaluation des stenoses des arteres coronaires en IRM 3 Teslas." Journal de Radiologie 88, no. 10 (October 2007): 1278. http://dx.doi.org/10.1016/s0221-0363(07)80679-2.

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Roche, D., C. Michel, P. Daudé, A. Ogier, C. Chagnaud, J. P. Mattei, L. Pini, M. Guye, D. Bendahan, and S. Guis. "IRM 7 Teslas de l’enthèse quadricipitale chez des sujets sains." Revue du Rhumatisme 87 (December 2020): A256—A257. http://dx.doi.org/10.1016/j.rhum.2020.10.461.

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García-Baizán, A., A. Tomás-Biosca, P. Bartolomé Leal, P. D. Domínguez, R. García de Eulate Ruiz, S. Tejada, and J. L. Zubieta. "Resonancia magnética intraoperatoria de 3 teslas: Nuestra experiencia en patología tumoral." Radiología 60, no. 2 (March 2018): 136–42. http://dx.doi.org/10.1016/j.rx.2017.12.002.

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Deutsch, C., H. B. Nersisyan, and A. Bendib. "Diagnosing dense and magnetized plasmas irradiated by a petawatt laser." Laser and Particle Beams 34, no. 1 (November 30, 2015): 61–71. http://dx.doi.org/10.1017/s0263034615000919.

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AbstractWe survey the present status and potentialities of diagnostics for arbitrary magnetized plasmas of inertial confinement fusion concern. These diagnostics include: Faraday rotation, inverse Faraday effect, Thomson scattering, Stark–Zeeman line broadening as well as proton stopping for any ratio, of the particles plasma frequency to cyclotron frequency. This presentation is timely motivated by recent experiments highlighting laser-produced kilo Teslas and nearly steady magnetic fields in inertial fusion plasmas. Positive synergies due to diagnostics combinations are also addressed.
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Barba, Ignasi, Ángel Moreno, Irene Martínez-Pérez, Anne Rosemary Tate, Miquel E. Cabañas, Miguel Baquero, Antoni Capdevila, and Carles Arús. "Magnetic resonance spectroscopy of brain hemangiopericytomas: high myoinositol concentrations and discrimination from meningiomas." Journal of Neurosurgery 94, no. 1 (January 2001): 55–60. http://dx.doi.org/10.3171/jns.2001.94.1.0055.

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Object. Hemangiopericytomas are a rare type of brain tumor that are very similar to meningiomas in appearance and symptoms but require different treatment. It is not normally possible to distinguish between them by using magnetic resonance (MR) imaging and computerized tomography studies. However, discrimination may be possible by using in vivo MR spectroscopy (MRS) because the biochemical composition of these two lesions is different. The goal of this study was to describe the use of MRS in discriminating between these similar tumor types. Methods. In vivo MRS spectra were acquired in 27 patients (three with hemangiopericytomas and 24 with meningiomas) by using a single-voxel proton brain examination system at 1.5 teslas with short— (20-msec) and long— (135-msec) echo times. In addition, brain biopsy specimens obtained by open craniotomy were frozen within 5 minutes of resection and stored in liquid nitrogen until they were used. The specimens were powdered, extracted with perchloric acid, redissolved in 2H2O, and high-resolution in vitro MRS was used at 9.4 teslas to record their spectra. Conclusions. In this study the authors show that hemangiopericytomas could be clearly distinguished from meningiomas because they have a larger peak at 3.56 ppm. Measurements of extracts of the tumors and comparison of spectra acquired with MRS at long— (135-msec) and short— (20-msec) echo times established that this was due to the much higher levels of myoinositol in the hemangiopericytomas.
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Lin, T. F., and J. B. Gilbert. "Studies of helical magnetohydrodynamic seawater flow in fields up to twelve teslas." Journal of Propulsion and Power 11, no. 6 (November 1995): 1349–55. http://dx.doi.org/10.2514/3.23978.

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Dissertations / Theses on the topic "Teslas":

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Leprince, Yann. "Imagerie des couches corticales par résonance magnétique à 7 teslas." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112022/document.

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Cette thèse présente le développement d’une méthodologie qui permet d’analyser la structure en couches du cortex cérébral, en utilisant l’imagerie par résonance magnétique en champ intense (IRM à 7 teslas). Alors que l’architecture corticale est traditionnellement étudiée par imagerie microscopique de coupes de tissu post-mortem, l’utilisation d’une technique non invasive telle que l’IRM permet d’envisager d’étudier la lamination corticale in vivo, et ainsi de dépasser les atlas architecturaux classiques comme celui de Brodmann.Deux approches ont été utilisées pour l’acquisition d’images à haute résolution. La première, développée pour l’imagerie in vivo, utilise une reconstruction super-résolue à partir de coupes épaisses acquises dans différentes géométries. La seconde, basée sur une séquence tridimensionnelle optimisée pour l’imagerie post-mortem, a permis l’acquisition d’images de pièces anatomiques.La contribution principale de cette thèse réside dans le développement d’un couple de méthodes permettant d’extraire automatiquement, en chaque point du cortex, un profil caractérisant son architecture en couches. Pour permettre l’extraction robuste de ces profils, un modèle original de l’influence de la courbure corticale a été développé et implémenté.Ces méthodes ont été testées et validées sur plusieurs pièces anatomiques. Ce travail permet d’envisager la caractérisation de l’architecture des aires corticales, voire leur délimitation automatique, en utilisant l’IRM en champ intense
This thesis presents the development of a methodology for the analysis of the layered structure of the cerebral cortex, using high-field magnetic resonance imaging (7-tesla MRI). While cortical layers are traditionally studied using microscopic imaging of post-mortem tissue slices, the use a non-invasive technique such as MRI will enable in vivo studies, and thus allow new approaches beyond the use of classical architectural atlases such as Brodmann's.Two imaging methodologies have been used to acquire high-resolution images. First, a method based on super-resolution reconstruction from thick slices acquired in different geometries was developed for in vivo imaging. Second, a three-dimensional imaging sequence optimized for post-mortem tissue allowed imaging excised brain specimen.The main contribution of this thesis consists of a pair of methods that perform an automatic extraction of cortical profiles, which characterize the laminar architecture at any cortical location. In order to allow robust extraction of these profiles, an original model of the influence of cortical curvature was developed and implemented.These methods were tested and validated on multiple brain specimen. This work allows envisaging an automatic microarchitectural characterization of cortical areas, and even architectural parcellation, using high-field MRI
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Goebel, Jean-Christophe. "Etude IRM du vieillissement articulaire à 1.5 et 7 Teslas : Approches volumiques et cartographiques." Thesis, Nancy 1, 2009. http://www.theses.fr/2009NAN10108/document.

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L'arthrose est une maladie commune observée dans les populations vieillissantes caractérisée par une affection dégénérative du cartilage articulaire. Le diagnostic clinique de la maladie repose sur la radiographie conventionnelle. Cette technique permet de mettre en évidence les modifications de l'os liées à l'arthrose (géodes, condensation de l'os sous-chondral, et ostéophytes) mais n'offre pas une vision directe du cartilage. Grâce à sa résolution spatiale et son contraste tissulaire élevé, l'IRM individualise le cartilage et le différencie des structures adjacentes (os, tissu synovial, ménisques et liquide synovial). Nous avons mis à profit les potentialités de l'IRM à haut champ (7 Teslas) pour suivre, in vivo, les modifications du cartilage de l'articulation fémoro-tibiale chez le rat, au cours du processus de maturation/vieillissement ainsi que dans un modèle d'arthrose expérimentale (section du ligament croisé antérieur). Ces travaux ont montré une diminution du volume et des épaisseurs cartilagineuses liée à l'âge, tout comme des pertes chondrales fémorales et un œdème du cartilage tibial dans le genou arthrosique. Dans une seconde partie, nous avons appliqué les méthodes de cartographie T2 et de mesures volumiques (à 1,5 T) afin de déterminer les variations survenant au sein du cartilage rotulien humain vieillissant. Ces travaux attestent de la capacité de la cartographie T2 à détecter des modifications matricielles avant l'apparition de réelles pertes chondrales. Enfin, notre dernière étude, toujours à 1,5 T, concerne la quantification du volume et de l'activité de la membrane synoviale inflammatoire dans une cohorte de patients souffrant de gonarthrose
Osteoarthritis (OA) is a common disease observed in elderly population and characterized by a progressive destruction of cartilaginous tissue. The clinical diagnosis of this disease is realized by conventional radiography. This method allows visualizing bone modifications related to OA disease (cysts, subchondral bone thickening, and osteophytes) but is unable to assess directly cartilage structure. Due to its high spatial resolution and high contrast between tissues, Magnetic Resonance Imaging (MRI) is able to visualize the cartilage structure and to differentiate it from adjacent structures (bone, synovial tissue, menisci, and synovial fluid). We have employed MRI potentialities at high magnetic field (7 Teslas) to follow, in vivo, cartilage modifications in the rat femoro-tibial articulation. This methodology was used to evaluate normal cartilage ageing-process and to assess an experimental OA model (anterior cruciate ligament transaction). These works showed an age-related cartilage volumetric and thickness decrease, as well as femoral cartilage damages and tibial cartilage oedema in OA knees. In a second part of our work, we applied T2 mapping and volumetric techniques (at 1.5 T) to determine variations which occur in the elderly human patellar cartilage. Results demonstrated the capacity of T2 mapping to early detect matricial modifications before any cartilage volumetric impact can be found. At least, our last study, always at 1.5 T, focused on the synovial membrane volume and inflammatory activity by taking into account a human population suffering from knee OA
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Freitas, Lincoln da Silva. "Estudo anatômico do tronco encefálico por imagens de ressonância magnética de 3 Teslas e correlação com cortes histológicos." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/17/17140/tde-27072016-155314/.

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O Tronco encefálico é uma estrutura singular do sistema nervoso central, pois nele passam tratos sensoriais ascendentes da medula espinal, tratos sensoriais da cabeça e do pescoço, os tratos descendentes motores originados no prosencéfalo, as vias ligadas a centros de movimento dos olhos, contemos núcleos dos nervos cranianos, e também está envolvido na regulação do nível de consciência através de projeções ao prosencéfalo oriundas da formação reticular. Tudo isto compactado em um espaço muito exíguo o que faz deste um local particularmente sensível às alterações patológicas, mesmo que pequenas, que acabam cursando com uma riqueza de sinais neurológicos devido a presença muito próxima das estruturas já citadas. Compreender a anatomia interna do tronco encefálico é essencial para o diagnóstico neurológico e a prática da medicina clínica. Por tudo que foi exposto, o tronco encefálico é um terreno fértil para o estudo através do diagnóstico por imagem, principalmente quando realizado por novas tecnologias, como exames em aparelho de ressonância magnética de alto campo (3 teslas). No entanto, pouco se sabe sobre as correlações existentes entre a microscopia e as imagens de ressonância magnética do tronco encefálico. Sendo assim, o objetivo deste estudo foi analisar e correlacionar as diversas estruturas encontradas no tronco encefálico, visualizadas em peças microscópicas de encéfalos humanos post mortem, com as imagens de ressonância magnética dos mesmos, antes da dissecção, mapeandoas e discernindo-as, contribuindo assim para diagnósticos mais precisos e topográficos das patologias que acometem o tronco encefálico, justificando o presente estudo. O estudo foi de caráter observacional exploratório e descritivo, adotando as seguintes técnicas para coleta da informações: os encéfalos humanos (n=3) foram submersos em recipiente contendo água e então lacrados de forma que o ar ambiente não entrasse no recipiente. As imagens de RM foram adquiridas em sequência gradiente echo (FFE) 2D em equipamento de campo 3T (PHILIPS ACHIEVA), com bobina de 8 canais de encéfalo. Foi utilizado TE=9,0 ms, TR=1000 ms e o ângulo de flip 90°; número de médias igual 10 e BW por pixel igual a 72 Hz/pixel. O Fator EPI utilizado foi igual a um e a resolução espacial de 0,219x0,219x2,0 mm3 com FOV de 210x210x90mm3. O tempo total de aquisição foi de 3 horas e 01 minuto e 96 segundos. Imagens histológicas utilizadas no presente estudo são do banco de dados do departamento de patologia da UNICAMP e foram comparadas às imagens obtidas na ressonância magnética. Demonstramos que foi possível a identificação das estruturas visíveis, histologicamente, nas imagens obtidas, com definição e resolução suficiente para a geração de um atlas de imagens de ressonância magnética de cortes do tronco encefálico
The Brainstem is a unique structure of the central nervous system, because in it pass ascending sensory tracts of the spinal cord, sensory tracts of head and neck, descending tracts originated in the forebrain, the pathways linked to eye movement centers, contains nuclei of cranial nerves, and is also involved in regulating the level of consciousness through projections to the forebrain that arise from the reticular formation. All these estructures are packed into a very small space which makes the brainstem a particularly sensitive place to pathological changes, that bring up a large amount of neurological signs due to very close packing of the aforementioned structures.Understanding the internal anatomy of the brainstem is essential for the neurological diagnosis and the clinical medicine practice. Thus, the brainstem is fertile ground for the study through diagnostic imaging, especially when performed by new technologies such as high-field (3 tesla) MRI machines. However, little is known about the correlation between the microscopy and magnetic resonance imaging of the brainstem. The aim of this study was to analyze and correlate the various structures found in the brainstem, viewed in microscopic slides of human brains post mortem, with the magnetic resonance imaging thereof, prior to dissection, mapping them and defining them, thus contributing to more accurate diagnoses and surveying of pathologies that affect the brainstem. Human brains (n = 3) were submerged in a container containing water, and then sealed so that the ambient air does not enter the container. MRI images were acquired in gradient echo sequence (FFE) 2D 3T field equipment (PHILIPS ACHIEVA) with coil 8- channel brain. It was used TE = 9.0 ms, TR = 1000 ms and flip angle 90°; number of averages equal to 10 and BW per pixel equal to 72 Hz/pixel. Factor PPE used was equal to one and the spatial resolution of FOV with 0,219x0,219x2,0 mm3 210x210x90mm3. The total acquisition time was 3 hours, 01 minute and 96 seconds. Histological images used in this study are from the pathology department of State University of Campinas (UNICAMP) database and compared to images obtained in MRI. We demonstrated that it was possible to identify histologically visible structures in images acquired with sufficient resolution and definition to generate an magnetic resonance imaging atlas of the brainstem sections
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Carneiro, H?rica Priscila de Ara?jo. "Testes de hip?teses em modelos de sobreviv?ncia com Fra??o de cura." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18644.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
Survival models deals with the modeling of time to event data. However in some situations part of the population may be no longer subject to the event. Models that take this fact into account are called cure rate models. There are few studies about hypothesis tests in cure rate models. Recently a new test statistic, the gradient statistic, has been proposed. It shares the same asymptotic properties with the classic large sample tests, the likelihood ratio, score and Wald tests. Some simulation studies have been carried out to explore the behavior of the gradient statistic in fi nite samples and compare it with the classic statistics in diff erent models. The main objective of this work is to study and compare the performance of gradient test and likelihood ratio test in cure rate models. We first describe the models and present the main asymptotic properties of the tests. We perform a simulation study based on the promotion time model with Weibull distribution to assess the performance of the tests in finite samples. An application is presented to illustrate the studied concepts
Modelos de sobreviv?ncia tratam do estudo do tempo at? a ocorr?ncia de um evento. Contudo em algumas situa??es, uma propor??o da popula??o pode n?o estar mais sujeita a ocorr?ncia deste evento. Modelos que tratam desta abordagem s?o chamados de modelos de fra??o de cura. Existem poucos estudos na literatura sobre testes de hip?teses aplicados a modelos de fra??o de cura. Recentemente foi proposta uma nova estat?stica de teste, denominada estat?stica gradiente que possui distribui??o assint?tica equivalente a das estat?sticas usuais. Alguns estudos de simula??o v?m sendo desenvolvidos no sentido de explorar caracter?sticas dessa nova estat?stica e comparar com as estat?sticas cl?ssicas, aplicadas a diferentes modelos. Este trabalho tem como principal objetivo estudar e comparar o desempenho do teste gradiente e do teste da raz?o de verossimilhan?as, em modelos de fra??o de cura. Para isso descrevemos caracter?sticas do modelo e apresentamos os principais resultados assint?ticos dos testes. Consideramos um estudo de simula??o com base no modelo de tempo de promo??o com distribui??o Weibull, para avaliar o desempenho dos testes em amostras finitas. Uma aplica??o e realizada para ilustrar os conceitos estudados
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Couto, César Francisco de Moura. "Predicting software defects with causality tests = Predizendo defeitos de software com testes de causalidade." Universidade Federal de Minas Gerais, 2013. http://hdl.handle.net/1843/ESBF-9GMMLN.

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Defect prediction is a central area of research in software engineering that aims to identify the components of a software system that are more likely to present defects. Despite the large investment in research aiming to identify an effective way to predict defects in software systems, there is still no widely used solution to this problem. Current defect prediction approaches present at least two main problems in the current defect prediction approaches. First, most approaches do not consider the idea of causality between software metrics and defects. More specifically, the studies performed to evaluate defect prediction techniques do not investigate in-depth whether the discovered relationships indicate cause-effect relations or whether they are statistical coincidences. The second problem concerns the output of the current defect prediction models. Typically, most indicate the number or the existence of defects in a component in the future. Clearly, the availability of this information is important to foster software quality. However, predicting defects as soon as they are introduced in the code is more useful to maintainers than simply signaling the future occurrences of defects. To tackle these questions, in this thesis we propose a defect prediction approach centered on more robust evidences towards causality between source code metrics (as predictors) and the occurrence of defects. More specifically, we rely on a statistical hypothesis test proposed by Clive Granger to evaluate whether past variations in source code metrics values can be used to forecast changes in time series of defects. The Granger Causality Test was originally proposed to evaluate causality between time series of economic data. Our approach triggers alarms whenever changes made to the source code of a target system are likely to present defects. We evaluated our approach in several life stages of four Java-based systems. We reached an average precision greater than 50% in three out of the four systems we evaluated. Moreover, by comparing our approach with baselines that are not based on causality tests, it achieved a better precision.
Predição de defeitos é uma área de pesquisa em engenharia de software que objetiva identificar os componentes de um sistema de software que são mais prováveis de apresentar defeitos. Apesar do grande investimento em pesquisa objetivando identificar uma maneira efetiva para predizer defeitos em sistemas de software, ainda não existe uma solução amplamente utilizada para este problema. As atuais abordagens para predição de defeitos apresentam pelo menos dois problemas principais. Primeiro, a maioria das abordagens não considera a idéia de causalidade entre métricas de software e defeitos. Mais especificamente, os estudos realizados para avaliar as técnicas de predição de defeitos não investigam em profundidade se as relações descobertas indicam relações de causa e efeito ou se são coincidências estatísticas. O segundo problema diz respeito a saída dos atuais modelos de predição de defeitos. Tipicamente, a maioria dos modelos indica o número ou a existência de defeitos em um componente no futuro. Claramente, a disponibilidade desta informação é importante para promover a qualidade de software. Entretanto, predizer defeitos logo que eles são introduzidos no código é mais útil para mantenedores que simplesmente sinalizar futuras ocorrências de defeitos. Para resolver estas questões, nós propomos uma abordagem para predição de defeitos centrada em evidências mais robustas no sentido de causalidade entre métricas de código fonte (como preditor) e a ocorrência de defeitos. Mais especificamente, nós usamos um teste de hipótese estatístico proposto por Clive Granger (Teste de Causalidade de Granger) para avaliar se variações passadas nos valores de métricas de código fonte podem ser usados para predizer mudanças em séries temporais de defeitos. Nossa abordagem ativa alarmes quando mudanças realizadas no código fonte de um sistema alvo são prováveis de produzir defeitos. Nós avaliamos nossa abordagem em várias fases da vida de quatro sistemas implementados em Java. Nós alcançamos um precisão média maior do que 50% em três dos quatro sistemas avaliados. Além disso, ao comparar nossa abordagem com abordagens que não são baseadas em testes de causalidade, nossa abordagem alcançou uma precisão melhor.
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Sebastiani, Renate Grings. "An?lise de erros em testes de hip?teses : um estudo com alunos de engenharia." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2010. http://tede2.pucrs.br/tede2/handle/tede/3398.

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Esta investiga??o tem como objetivo analisar os erros cometidos por alunos dos cursos de Engenharia nas provas semestrais em que os conte?dos avaliados s?o os testes de hip?teses. Estes est?o inclu?dos na ementa da disciplina de Probabilidade e Estat?stica e s?o a parte mais vis?vel da estat?stica em artigos cient?ficos. Entend?-los ? parte b?sica da liter?cia estat?stica para a compreens?o da literatura acad?mica e cient?fica. Na literatura, s?o encontrados alguns estudos sobre dificuldades e erros, mas o tema ainda carece de investiga??es. Este trabalho, portanto, consiste em classificar os erros identificados nas solu??es dos alunos, fazendo um comparativo com a literatura da ?rea, al?m de analisar as respostas dadas a um question?rio aplicado aos professores das turmas participantes, sobre as poss?veis causas dos erros. Foram participantes desta pesquisa sete turmas de tr?s universidades ga?chas e, tamb?m, seis professores que lecionam a disciplina. As respostas analisadas referem-se aos testes para uma amostra, totalizando 178 respostas sobre o teste para a m?dia (com desvio padr?o desconhecido) e 179 respostas sobre o teste para a propor??o. Os erros foram classificados em sete categorias, e observou-se que as maiores dificuldades dos alunos est?o relacionadas ? formula??o da conclus?o, ou seja, ? etapa da interpreta??o dos resultados. Os professores que responderam ao question?rio consideram, em geral, que os alunos n?o compreendem a estrutura dos testes de hip?teses e, tamb?m, que lhes faltam pr?-requisitos, como conhecimentos matem?ticos elementares e de interpreta??o de textos. Ainda, apontam a falta de aten??o, de estudo e de realiza??o de exerc?cios como poss?veis causas dos erros. Os resultados sugerem que, no ensino deste conte?do, seja dada mais ?nfase aos conceitos envolvidos do que aos procedimentos e c?lculos, como forma de promover a aprendizagem significativa.
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Aguas, Alexandra. "Tesla's Totally True Adventures." Digital Commons at Loyola Marymount University and Loyola Law School, 2021. https://digitalcommons.lmu.edu/etd/977.

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A half-hour adult animated pilot partially based on eccentric inventor Nikola Tesla. Logline: Brilliant engineering student Dot must keep her boss, famed eccentric inventor Nikola Tesla, out of trouble as his unhinged contraptions wreak havoc on 1920s New York City while he battles his longtime rival, Thomas Edison.
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Dieringer, Matthias [Verfasser]. "Schnelle zweidimensionale Kartierung der longitudinalen Relaxationszeit T1 bei 1.5 Tesla, 3 Tesla und 7 Tesla mittels Magnetresonanztomographie / Matthias Dieringer." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2014. http://d-nb.info/1062536673/34.

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Yetişir, Filiz. "Parallel radiofrequency transmission for 3 Tesla and 7 Tesla magnetic resonance imaging." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113982.

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Abstract:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 141-146).
Magnetic resonance imaging (MRI) is a noninvasive imaging technique with high soft tissue contrast. MR scanners are characterized by their main magnetic field strength. Commercially available clinical MR scanners commonly have main field strengths of 1.5 and 3 Tesla. Researchers increasingly explore clinical benefits of higher field strength scanners as they provide higher signal to noise ratio and higher resolution images. On the other hand, higher field strength imaging comes with increased image shading leading to non-uniform image contrast. Moreover, the tissue heating rate due to radiofrequency (RF) energy deposition (also called specific absorption rate or SAR) increases, limiting the imaging speed. Parallel RF transmission (pTx) was proposed to address both of these challenges by optimization of RF pulses transmitted from multiple independent channels simultaneously. However, both the RF pulse design and RF safety management become more complicated with pTx. In this work, a framework to apply pTx to 3T fetal and 7T brain imaging is developed to address the image shading and high SAR issues. Fetal imaging where a large pregnant torso is imaged rapidly to avoid fetal motion artifacts, suffers from similar levels of image shading and imaging limitations by SAR to 7T brain MRI. Hence the same techniques benefit both application domains. First, a SAR constrained pTx RF pulse design technique is developed for slice selective high flip angle imaging which is clinically the most common imaging technique. Next, the performance of the developed technique in reducing SAR and the image contrast non-uniformity is demonstrated through simulations and in phantom experiments for 7T brain imaging. Then, a comprehensive RF safety workflow for an 8 channel pTx system at 7T is developed. Finally, the potential of pTx for fetal imaging at 3T is demonstrated with simulation studies and a protected fetus mode of pTx was created using additional constraints in the RF pulse design. By addressing the two main RF transmission challenges associated with high and ultrahigh field MRI, this work aims to help bring the benefits of 7T brain imaging into routine clinical use and significantly improve the clinical experience for 3T fetal imaging.
by Filiz Yetişir.
Ph. D.
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Lundqvist, Nathalie, and Olivia Jönsson. "“Livet vi lever är jettat, därför många vill testa. Jalla, kom testa, ra-ta-ta-ta från en Tesla” : En tematisk och språklig innehållsanalys om gangsterrapens normalisering och uppmuntran av kriminalitet." Thesis, Hälsohögskolan, Jönköping University, HHJ, Avd. för socialt arbete, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49563.

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The gangsta rap has topped the Swedish music charts in recent years and the controversial message of the music genre has led people in the community to question what the gangsta rap message convey. The purpose of the study is to investigate how a normalization and encouragement of crime are characterized in the contemporary song texts, and how men and women are portrayed in connection with the power aspects of society. The method choice is a qualitative thematic and linguistic content analysis with the aim of examining the significance of the song texts in deph. The study has been conducted on the 24 songs that have been streamed the most number of times according to P3´s DigiLista since 2018. The result shows that the gangsta rap encourages and romanticizes crime through its choice of personal pronouns and semantics in the song lyrics. Women and men are portrayed in an unequal way, where women are portrayed as objectified as opposed to the hegemonic masculinity with which masculine men are equated. Power has been proven to be a dominant concept throughout the performance analysis and the power aspect has conveyed different viewpoints in each theme. The power that gangster rappers get through their coveted music may come to encourage criminal acts through their choice of words.
Gangsterrapen har toppat de svenska musiklistorna de senaste åren och musikgenrens kontroversiella budskap har fått människor i samhället att ifrågasätta vad gangsterrapens budskap förmedlar. Syftet med studien är att undersöka på vilket sätt en normalisering och uppmuntran av kriminalitet präglas i de nutida låttexterna och hur män och kvinnor skildras i koppling till samhällets maktaspekter. Metodvalet är en kvalitativ tematisk och språklig innehållsanalys med syftet att kunna granska låttexternas betydelse på djupet. Studien har genomförts på de 24 låtarna som har streamats flest antal gånger enligt P3’s DigiLista sedan 2018. Av resultatet framkommer att gangsterrapen uppmuntrar och romantiserar kriminalitet genom dess val av personliga pronomen och semantiken i låttexterna. Kvinnor och män skildras på ett ojämlikt sätt, där kvinnor framställs som objektifierade gentemot den hegemoniska manligheten som maskulina män likställs med. Makt har påvisats vara ett dominerande begrepp genom hela resultatanalysen och maktaspekten har förmedlat olika synvinklar i respektive tema. Makten som gangsterraparna får genom deras eftertraktade musik bidrar till att de kan komma att uppmuntra till kriminella handlingar genom deras val av språkbruk.

Books on the topic "Teslas":

1

Tesla, Nikola. Tesla 1856-2006: 150th anniversary of Nikola Tesla's birth. Belgrade: Nikola Tesla Museum, 2006.

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Castillo, José Vila del. Teselas. Torrejon de la Calzada (Madrid): Devenir, 2014.

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Pištalo, Vladimir. Tesla, mladost. Beograd: Politika, 2006.

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Maurer, Tracy. Tesla Roadster. Vero Beach, FL: Rourke Pub., 2008.

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Ivanković, R. Tesla 150. Beograd: Elektroprivreda Srbije, centar za odnose s javnošću, 2006.

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Ždrale, Radovan. Dečak Tesla. Beograd: Prosveta, 2001.

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Fraser, David Gustav. Tesla electric. Toronto: ArtBiz Communications, 1995.

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Bazo, Enrique. Tesla-Edison. Huelva, Spain]: Diputación de Huelva, 2011.

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Wahl, Günter. Das grosse Tesla Experimentier Handbuch: Tesla- & Hochspannungsgeneratoren. Poing: Franzis, 2004.

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Rykov, Alekseĭ. Tesla protiv Ėĭnshteĭna. Moskva: ĖKSMO, 2010.

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Book chapters on the topic "Teslas":

1

Bösenberg, Jens, David J. Brassington, and Paul C. Simon. "TESLAS Publications 1988–1995." In Instrument Development for Atmospheric Research and Monitoring, 191–203. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-03405-7_7.

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Bösenberg, Jens. "TESLAS: Tropospheric Environmental Studies by Laser Sounding." In Transport and Chemical Transformation of Pollutants in the Troposphere, 414–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-59718-3_21.

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O’Hara, James E., Igor UsUpensky, N. J. Bostanian, John L. Capinera, Reg Chapman, Carl S. Barfield, Marilyn E. Swisher, et al. "Testis (pl., Testes)." In Encyclopedia of Entomology, 3755. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_2411.

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Sekerak, Robin, and Nathan D. Zasler. "Tesla." In Encyclopedia of Clinical Neuropsychology, 3426. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-57111-9_76.

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Sekerak, Robin. "Tesla." In Encyclopedia of Clinical Neuropsychology, 2488. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-0-387-79948-3_76.

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Gooch, Jan W. "Tesla." In Encyclopedic Dictionary of Polymers, 736. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_11680.

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Sekerak, Robin, and Nathan D. Zasler. "Tesla." In Encyclopedia of Clinical Neuropsychology, 1. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56782-2_76-2.

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Matthews, Tina, Mrunal Hirve, Yuqian Pan, Dao Dang, Elia Rawar, and Tugrul U. Daim. "Tesla Energy." In Science, Technology and Innovation Studies, 233–49. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58301-9_15.

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Gharibyan, V., N. Meyners, and K. P. Schüler. "TESLA Polarimeters." In Spin Structure of the Nucleon, 141–48. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0165-6_13.

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Schubert, Matthias. "Tests, Tests, Tests." In Mathematik für Informatiker, 737–74. Wiesbaden: Vieweg+Teubner Verlag, 2012. http://dx.doi.org/10.1007/978-3-8348-1995-6_26.

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Conference papers on the topic "Teslas":

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Moore, H., E. Bell, R. Duggan, D. Liang, L. Mehr, A. Novick, L. Ransohoff, et al. "Generating magnetic fields stronger than 100 teslas using solenoids on COBRA." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012256.

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Tabak, G., E. Bell, R. Duggan, D. Liang, L. Mehr, H. Moore, A. Novick, et al. "Measuring magnetic fields stronger than 100 teslas using miniature b-dot probes on COBRA." In 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS). IEEE, 2014. http://dx.doi.org/10.1109/plasma.2014.7012257.

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Halova, Elena, and Nevena Koujuharova. "Advantages of TeSLA project on-line tests in physics education at TU-Sofia." In PROCEEDINGS OF THE 44TH INTERNATIONAL CONFERENCE ON APPLICATIONS OF MATHEMATICS IN ENGINEERING AND ECONOMICS: (AMEE’18). Author(s), 2018. http://dx.doi.org/10.1063/1.5082118.

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Cugola, Gianpaolo, and Alessandro Margara. "TESLA." In the Fourth ACM International Conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1827418.1827427.

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Anderson, Jonathan, Robert N. M. Watson, David Chisnall, Khilan Gudka, Ilias Marinos, and Brooks Davis. "TESLA." In the Ninth European Conference. New York, New York, USA: ACM Press, 2014. http://dx.doi.org/10.1145/2592798.2592801.

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Blaylock, Nate, Bradley Swain, and James Allen. "TESLA." In Human Language Technologies: The 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Companion Volume: Short Papers. Morristown, NJ, USA: Association for Computational Linguistics, 2009. http://dx.doi.org/10.3115/1620853.1620867.

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Batrakov, A. M. "Construction and Tests of the 49-pole 3.5 Tesla Superconducting Wiggler for ELETTRA Storage Ring." In SYNCHROTRON RADIATION INSTRUMENTATION: Eighth International Conference on Synchrotron Radiation Instrumentation. AIP, 2004. http://dx.doi.org/10.1063/1.1757764.

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Doucet, Mathieu. "A detector for TESLA, diamond calorimeter development for TESLA, a TPC for TESLA." In International Europhysics Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2001. http://dx.doi.org/10.22323/1.007.0251.

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Ikegawa, Koshi, and Buntarou Shizuki. "Tesla blocks." In OzCHI '18: 30th Australian Computer-Human Interaction Conference. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3292147.3292221.

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Ellinghaus, Frank. "TESLA-N: Polarized electron-nucleon scattering at TESLA." In The fourteenth international spin physics symposium, SPIN2000. AIP, 2001. http://dx.doi.org/10.1063/1.1384193.

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Reports on the topic "Teslas":

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Delmas, Magali, Matthew Kahn, and Stephen Locke. Accidental Environmentalists? Californian Demand for Teslas and Solar Panels. Cambridge, MA: National Bureau of Economic Research, December 2014. http://dx.doi.org/10.3386/w20754.

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Peterson, T. J., and J. G. Weisend, II. TESLA & ILC Cryomodules. Office of Scientific and Technical Information (OSTI), January 2016. http://dx.doi.org/10.2172/1250872.

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Weiner, Michael W. 4 Tesla MRI for Neurodegenerative Diseases. Fort Belvoir, VA: Defense Technical Information Center, October 2005. http://dx.doi.org/10.21236/ada462064.

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Stein, W., and J. C. Sheppard. Structural Modeling of Tesla TDR Positron Target. Office of Scientific and Technical Information (OSTI), March 2002. http://dx.doi.org/10.2172/15003399.

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Cornuelle, John C. Report on the TESLA Engineering Study/Review. Office of Scientific and Technical Information (OSTI), August 2002. http://dx.doi.org/10.2172/801801.

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Gordee, S. M., J. B. Mahoney, R. L. Hooper, and J. W. Haggart. Geology, Tesla Lake (93E/02), British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2006. http://dx.doi.org/10.4095/222917.

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C. Boffo et al. Report on the TESLA engineering study/review. Office of Scientific and Technical Information (OSTI), July 2002. http://dx.doi.org/10.2172/797143.

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Sun, D., and K. Koepke. Report on first TESLA window assembly test. Office of Scientific and Technical Information (OSTI), October 1993. http://dx.doi.org/10.2172/10124479.

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Stevens, R. A. The Teslin Suture Zone in Northwest Teslin map area, Yukon. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132522.

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Fries, S., and H. Tschofenig. Bootstrapping Timed Efficient Stream Loss-Tolerant Authentication (TESLA). RFC Editor, March 2006. http://dx.doi.org/10.17487/rfc4442.

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