Dissertations / Theses on the topic 'Tractor beam'
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Flajšmanová, Jana. "Behaviour of Objects in Structured Light Fields and Low Pressures." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444991.
Full textScott, Roderick Spencer. "Parallel-processor-based Gaussian beam tracer for use in ocean acoustic tomography." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA232420.
Full textThesis Advisor(s): Miller, James H. ; Chiu, Ching-Sang ; Yang, Chyan. "June 1990." Description based on title screen as viewed on October 20, 2009. DTIC Identifier(s): Acoustic Tomography, Theses, Range Kutta Fehlberg Method, C Programming Language, Macintosh 2 Computers, Transputers, Parallel Processors, Numerical Integration. Author(s) subject terms: Acoustic Tomography, Ray Tracing, Parallel Processing, Gaussian Beams, Transputers. Includes bibliographical references (p. 122-124). Also available online.
Al, Hage Gabriel. "Contribution à l'étude du comportement raidissant en traction du béton armé après fissuration." Thesis, Toulouse, INSA, 2011. http://www.theses.fr/2011ISAT0007/document.
Full textThe aim of this thesis is to study the stiffening effect of tensile concrete in flexural reinforced concrete beams by controlling the bond between steel and concrete. The process consists of experimentally determining the strain profile in both deep and thin flexural beams. We created a new finite element model for both deep and thin beams in accordance with experimental observations. The experimental tests we conducted on tension members highlight the existence of both transfer length and length with total bond loss characterizing the bond between tensile steel and concrete. The transfer length contributes to the production of a tension stiffening effect, thus limiting the stiffness decrease of the flexural beam. Measuring the beam deflection makes it possible to determine the transfer length, and consequently to achieve the main objective, namely the contribution of tensile concrete to beam stiffness
Christodoulou, Georgios. "A measurement of the electron neutrino component in the T2K beam using the tracker detectors and the electromagnetic calorimeter at the near detector ND280." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569512.
Full textGilbert, Elizabeth R. "Distribution and Relative Abundance of Nutrient Transporter mRNA in the Gastrointestinal Tract of Black Bears." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34491.
Full textMaster of Science
Ernst, Thomas. "Anthropogenes Iod-129 als Tracer für Umweltprozesse ein Beitrag zum Verhalten von Spurenstoffen bei der Migration in Böden und beim atmosphärischen Transport /." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=970679068.
Full textAttar, Ahmed. "Le béton renforcé de fibres metalliques, matériau anisotrope et hétérogène : caractérisation et modélisation du comportement en traction uniaxiale." Cachan, Ecole normale supérieure, 1996. http://www.theses.fr/1996DENS0011.
Full textKripp, Samario Tobias [Verfasser], Stefanie [Gutachter] Hahner, and Andreas [Gutachter] Buck. "In-vitro- und in-vivo-Evaluation selektiver Aldosteronsynthase-Inhibitoren als radiofluorierte Tracer für die Nebennierenbildgebung beim primären Hyperaldosteronismus / Samario Tobias Kripp ; Gutachter: Stefanie Hahner, Andreas Buck." Würzburg : Universität Würzburg, 2020. http://d-nb.info/1222910608/34.
Full textOLARD, François. "COMPORTEMENT THERMOMÉCANIQUE DES ENROBÉS BITUMINEUX À BASSES TEMPÉRATURES. Relations entre les propriétés du liant et de l'enrobé." Phd thesis, INSA de Lyon, 2003. http://tel.archives-ouvertes.fr/tel-00006050.
Full textAprès une étude bibliographique sur la rhéologie et les propriétés thermo-mécaniques des bitumes, des mastics et des enrobés bitumineux, le travail expérimental mené aussi bien dans le domaine des petites déformations que des grandes déformations, est exposé.
Le comportement à basse température des bitumes a été évalué avec trois tests fondamentaux largement répandus : i)l'essai de module complexe, ii)l'essai de fluage au BBR, iii)l'essai de traction directe SHRP à vitesse de déformation constante et températures constantes. En outre, un nouvel essai de fissuration, consistant en un essai de flexion trois points sur éprouvettes de bitume préentaillées, a été développé à l'ENTPE. Les paramètres de ténacité et d'énergie de rupture des bitumes à basses températures ont pu être déterminés en utilisant les hypothèses de la MLR (Mécanique Linéaire de la Rupture).
Le comportement thermo-mécanique des enrobés bitumineux à basse température a été étudié en réalisant i)des essais de module complexe, ii)des mesures du coefficient de dilatation-contraction thermique, iii)des essais de traction à vitesses de déformation constantes, iv)ainsi que des essais de retrait thermique empêché.
Tout d'abord, des liens pertinents entre les propriétés des liants et des enrobés, et des caractéristiques suffisamment discriminantes au regard des propriétés à basse température des enrobés ont été mis en évidence. Ensuite, l'analyse a consisté à effectuer un travail de modélisation du comportement des liants et des enrobés, en petites et grandes déformations.
Un modèle rhéologique monodimensionnel, qui consiste en une généralisation du modèle analogique de Huet-Sayegh, a été développé dans le domaine des petites déformations. Ce modèle, appelé modèle “2S2P1D”, permet de simuler correctement à la fois le comportement visco-élastique linéaire des bitumes et celui des enrobés bitumineux. A partir de ce modèle, une transformation originale –indépendante du modèle– permettant de prédire le module complexe de l'enrobé à partir de celui du liant est proposée, puis validée.
Enfin, la dernière partie de cette thèse est consacrée à la loi généralisée monodimensionnelle “DBN” (Di Benedetto-Neifar) à partir de laquelle un programme a été développé sur l'interface Visual Basic du logiciel Excel. Ce programme constitue un outil simple de prévision du comportement de l'enrobé bitumineux sous diverses sollicitations (mécaniques et/ou thermiques). Ce modèle rhéologique permet de faire le lien entre les petites et les grandes déformations. Des simulations d'essais de traction à vitesses de déformation constantes, ainsi que des simulations d'essais de retrait thermique, monotones ou cycliques, sont enfin présentées.
Ben, Salem Naoufel. "Fiabilité des assemblages structuraux collés pour applications spatiales." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14681/document.
Full textAdhesive bonding is being strongly considered in space applications CNES as anadvantageous assembly technique for future launchers. Correct design of adhesive joints is of majorconcern. Aerospace adhesives are tough viscoelastic matrices (special epoxy resins) reinforced withnano-, or microparticles. Extended use of adhesive joints in structural applications is limited due to thedifficulties in predicting in-service performance, frequently leading to over-conservative design.Three structural adhesives (Hysol®EA 9321, Hysol®EA 9394 and Hysol®EA 9395) wereselected. After their bulk characterization, statistical studies to highlight effects of different parameterse.g. speed, test piece geometry, degree of polymerization were undertaken.In the second stage, fracture mechanics tests were effected employing: the double cantileverbeam (DCB) configuration (mode I characterisation), the three point bending end-notched flexure(ENF) (mode II) and the mixed-mode bending (MMB) (combined mode I/II loading). Crack growth inbonded joints was investigated in a novel way. To refine standard test protocol, the backface strainmonitoring technique was used. Strain gauges were used to measure the strain on the exposed skin ofthe adherends during crack onset and propagation. This method allows better estimation of the crackfront position as well as fine investigation of the stress distribution along the bondline and in the crackfront vicinity. Digital image correlation (DIC) was also used to compare analytical models, e.g.Timoshenko beam on elastic foundation model with experimental results
Contamine, Raphaël. "Contribution à l’étude du comportement mécanique de composites textile-mortier : application à la réparation et/ou renforcement de poutres en béton armé vis-à-vis de l’effort tranchant." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10271/document.
Full textThis research focuses on repairing and strengthening concrete structures with composite materials. In this particular domain, carbon-epoxy composites are of considerable interest, but still room for improvement. The main objective of this thesis is to show alternatives to these composites, such as Textile Reinforced Concrete (TRC). Feasibility, performances and behavior of this alternative composite are examined. An experimental and analytical approach, at the micro-, meso- and macroscopic scale are conducted, notably thanks to the technique of digital image correlation for in-plane displacement measurement. Regarding the study of the material, a rather handy, reliable and efficient procedure of a direct tensile test was designed and validated. To enable a better understanding of the TRC behavior, 98 different TRC configurations were tested thanks to this procedure. The links between local mechanisms and macroscopic scale behavior were notably studied. Finally, key levers for optimizing the TRC were determined. On the structural level, a study was conducted on 11 beams shear strengthened by bonding of prefabricated plates or by contact molding. It shows that TRC solutions compare favorably with carbon-epoxy composites. Also, the local behavior was thoroughly assessed, notably the change of forces carried by the composite material and the truss model validity. A multi-cracking or pull-out behavior of the TRC was put forward depending on its application process
Zapata, González José Ricardo. "Comparative evaluation and combination of automatic rhythm description systems." Doctoral thesis, Universitat Pompeu Fabra, 2013. http://hdl.handle.net/10803/123822.
Full textEl análisis automático musical del ritmo en audio, y más concretamente el tempo y la detección de beats (Beat tracking), es uno de los problemas fundamentales en recuperación de información de Musical (MIR). La detección automática de beat es una valiosa herramienta para la solución de otros problemas de MIR, ya que permite el análisis sincronizado de la música con los beats para otras tareas. Describimos un nuevo método para la extracción de beats en señales de audio que mide el grado de confianza de la estimación, basado en la medición del grado de similitud entre un comité de sistemas de detección de beats. Este método automático se puede utilizar también para identificar canciones que son difíciles para la detección de beats. También realizamos una extensa evaluación comparativa de los sistemas actuales de descripción automática ritmo. Para esto, Evaluamos 32 algoritmos de tempo y 16 sistemas de detección de beats.
Innocenti, Claudia. "Mélange turbulent à partir d'une source isolée : géométrie, cinétique et role de la diffusion." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10082.
Full textHonoré, David. "Fluorescence induite par laser à excimères bande-fine. Application à la caractérisation de souffleries à haute enthalpie." Rouen, 1995. http://www.theses.fr/1995ROUES051.
Full textBraga, Miguel Mesquita Guimarães Oliveira. "Music Beat Tracker Device." Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/89583.
Full textBraga, Miguel Mesquita Guimarães Oliveira. "Music Beat Tracker Device." Master's thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/89583.
Full textKripp, Samario Tobias. "In-vitro- und in-vivo-Evaluation selektiver Aldosteronsynthase-Inhibitoren als radiofluorierte Tracer für die Nebennierenbildgebung beim primären Hyperaldosteronismus." Doctoral thesis, 2020. https://doi.org/10.25972/OPUS-21754.
Full textPrimary aldosteronism is one of the most common causes for secondary hypertension. The subtype differentation between aldosterone producing adenomas and bilateral adrenocortical hyperplasia is essential for a suitable treatment. Currently this affords a selective catherization of the adrenal veins. This test however is highly challenging and is attended by high radiation exposure. Therefore we analyzed the in vitro and in vivo effectivitiy of 11 fluorated aldosterone synthase (CYP11B2) inhibitors. The purpose was to develop a targeted imaging method with radiofluorinated tracers for the subtype differentation in primary aldosteronism. Several promising substances with a selective bond to CYP11B2 and inhibition of aldosterone production were found. These can possibly be used to differentate between the subtypes in primary aldosteronism
Lin, Wei-Chih, and 林威志. "The Analysis of the Interaction of ETF and related Financial Assets in the Bull and Bear Markets—Polaris Taiwan Top 50 Tracker Fund." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/82889543534601942618.
Full text國立臺灣大學
經濟學研究所
99
This paper investigates the interaction of ETF (Exchange Traded Funds) and related financial assets in the Bull and Bear markets. In this study, empirical data included Polaris Taiwan Top 50 Tracker Fund, Taiwan stock index, Taiwan stock index futures and Taiwan 50 index from January 2, 2006 to January 21, 2009. The model is derived from the quantitative method such as Unit Root Test, Chow Test, Cointegration Test, Granger causality Test, Vector Error Correction Model, Impulse function and Variance decomposition Model. Following conclusions can be drawn from this empirical result: In the aspect of the long term equilibrium, there exists the long term equilibrium relationship between ETF and related financial assets. This result corresponds to the One of Price Theory. However, derived financial assets could be more efficient than the spot markets. Previous hypotheses could explain this result. The results from Vector Error Correction Model and Granger causality Test show that:(1)ETF exists no significant lead relationship between other financial assets in the Bull market.(2)However, ETF leads other assets in the Bear markets. The features of Power value stock might explain the phenomenon. In the Variance decomposition Model, Taiwan stock index futures has more powerful to explain Taiwan stock index than ETF in Bull market. However, ETF could explain the majority of Taiwan index.
Ernst, Thomas [Verfasser]. "Anthropogenes Iod-129 als Tracer für Umweltprozesse : ein Beitrag zum Verhalten von Spurenstoffen bei der Migration in Böden und beim atmosphärischen Transport / von Thomas Ernst." 2003. http://d-nb.info/970679068/34.
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