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Yaghi, Anas H. "Static and dynamic brittle fracture." Thesis, University of Nottingham, 1993. http://eprints.nottingham.ac.uk/11786/.
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The project examined the static and dynamic fracture mechanics of brittle materials. Destructive testing was performed on brittle, elastic, isotropic and homogeneous epoxy resin specimens made of Araldite CT-200 with Hardener HT-907. Three types of specimen were investigated, namely the three point bend (3PB) beam, the compact mixed-mode (CMM) specimen and the pressure tube. The 3PB and CMM specimens contained both narrow notches and real cracks. The pressure tubes included semi-circular notches. The real cracks were obtained by controlled fatiguing. The research involved the evaluation of the static mode-I and mode-II real and apparent critical stress intensity factors. The fracture surfaces and the phenomenon of crack branching were studied. The dynamic mode-I stress intensity factor was obtained at the inception of crack instability and also at branching. The concept of the existence of a unique relationship between the dynamic stress intensity factor and the instantaneous crack velocity was addressed. The possibility of modelling cracks in structural components by using cast shim notches in epoxy resin was discussed. The modelling of the static behaviour was proposed to be accurate and relatively easy. The dynamic behaviour would be approximately modelled; therefore suggestions on how to improve the dynamic modelling of propagating cracks were recommended, paying particular attention to the branching process and the instantaneous crack velocity. In addition to the experimental work, finite element analysis was conducted for the 3PB and CMM specimens containing narrow notches. It was shown that the specific geometry and loading conditions were unimportant and that the loading was conveniently characterised by the stress intensity factors for an equivalent crack. A method was devised which provided a relatively cheap and efficient means of determining stress concentration factors for what might appear to be complex geometries and loading conditions.
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Rushton, Matthew V. "Static and dynamic type systems." Diss., Connect to the thesis Connect to the thesis, 2004. http://hdl.handle.net/10066/1483.
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Birdi, Bhavneet Kaur. "A Study of Dynamic + Static Space." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/33577.
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Architecture and dance are both able to communicate through a language of rhythm and choreography. The fluidity and balance of a dancer as an artistic endeavor can be an inspiration, to develop analogous architectural forms as a kind of transcribed motions of the dance.
A dancer''s movements and pauses can be interpreted as dynamic and static architectural moments. Dynamic space suggests to be active, and continuous, while static aims to be passive, tranquil and defined.
A proposal for an Art Center consisting of theater and a studio space serves as a vehicle to explore formally the spatial components inspired by dance. In the proposal, the theater embodies the active expression of motion. This provides a dynamic architectural space through two concentric curved enclosures that expand and contract horizontally and vertically. In contrast, the studios form a static shell, promoting a serene environment where the architecture frames the dancer''s activity.
The duality of dynamic and static architectural space in the work is a primary framework. The dynamic expresses the kinetic nature of architectural elements in space; in contrast, the static reveals the potential of a precisely measured room to achieve a balanced harmony when juxtaposed together.Master of Architecture
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Mitra, Dhrubaditya. "Studies of Static and Dynamic Multiscaling in Turbulence." Thesis, Indian Institute of Science, 2004. http://hdl.handle.net/2005/122.
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CSIR (INDIA), IFCPARThe physics of turbulence is the study of the chaotic and irregular behaviour in driven fluids. It is ubiquitous in cosmic, terrestrial and laboratory environments. To describe the properties of a simple incompressible fluid it is sufficient to know its velocity at all points in space and as a function of time. The equation of motion for the velocity of such a fluid is the incompressible Navier–Stokes equation. In more complicated cases, for example if the temperature of the fluid also fluctuates in space and time, the Navier–Stokes equation must be supplemented by additional equations. Incompressible fluid turbulence is the study of solutions of the Navier–Stokes equation at very high Reynolds numbers, Re, the dimensionless control parameter for this problem. The chaotic nature of these solutions leads us to characterise them by their statistical properties. For example, statistical properties of fluid turbulence are characterised often by structure functions of velocity. For intermediate range of length scales, that is the inertial range, these structure functions show multiscaling. Most studies concentrate on equal-time structure functions which describe the equal-time statistical properties of the turbulent fluid. Dynamic properties can be measured by more general time-dependent structure functions. A major challenge in the field of fluid turbulence is to understand the multiscaling properties of both the equal-time and time-dependent structure functions of velocity starting from the Navier–Stokes equation. In this thesis we use numerical and analytical techniques to study scaling and multiscaling of equal-time and time-dependent structure functions in turbulence not only in fluids but also in advection of passive-scalars and passive vectors, and in randomly forced Burgers equation.
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Abbs, Brandon Robert. "The temporal dynamics of auditory memory for static and dynamic sounds." Diss., University of Iowa, 2008. http://ir.uiowa.edu/etd/4.
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Silvera, Muñoz Raúl E. "Static instruction scheduling for dynamic issue processors." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=20237.
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This thesis presents a novel approach to the instruction scheduling problem for dynamic issue processors. Our approach aims at generating an instruction sequence with a low register pressure and a high level of Instruction-Level Parallelism (ILP) exploitable by the dynamic issue mechanism of the processor. Our objective is to improve the performance of the program by taking advantage of the out-of-order execution and register renaming mechanisms of the processor to reduce the amount of spill code introduced by the register allocator.Our approach uses a traditional ILP scheduler to generate an initial schedule for the program, and then reorders its instructions to reduce the register pressure of the program. This reordering is performed carefully. to ensure that the dynamic issue mechanism of the processor is able to exploit from the reordered sequence as much parallelism as available on the original schedule.
We have proposed an approximate method to determine, for a given instruction sequence and a given instruction schedule, whether a particular dynamic issue superscalar processor can exploit from the sequence as much ILP as present in the schedule. (Abstract shortened by UMI.)
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Li, Li Min 1964. "Static and dynamic properties of epileptogenic lesions." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36638.
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A series of studies were undertaken with the aim of assessing the static and dynamic profiles of the most common types of epileptogenic lesions: hippocampal sclerosis and cortical developmental malformations. Neuronal metabolic dysfunction measured by proton magnetic resonance spectroscopic imaging (1H-MRSI) overlaps the structural lesion displayed by magnetic resonance imaging (MRI), The extent of neuronal metabolic dysfunction, however, tends to be wider than the MRI-visible lesion and may reflect the intrinsic nature and extent of the original epileptogenic damage. In addition, neuronal metabolic dysfunction and synchronized neuronal firing often coincide spatially and vary together in intensity possibly reflecting the severity of the epileptogenic process.Non-foreign tissue lesional, temporal lobe epilepsy (TLE) syndrome is a heterogeneous condition, which displays a spectrum of neuronal damage. The different patterns of neuronal damage measured by MRI volumetry (MRIVol) and 1H-MRSI enable accurate probabilistic prediction of TLE lateralization and discrimination of TLE from extra-TLE. Furthermore, both MRIVol and 1H-MRSI have a prognostic value in surgical TLE patients, which can be used to streamline surgical candidates.
The neuronal damage is present in the early stages of the epileptogenic process in patients with localization related epilepsy. This process is dynamic and shows a slow progressive neuronal loss and dysfunction in TLE patients, which is not related to seizure burden. Neuronal metabolic dysfunction, lesions, spikes, cognitive decline, and psychiatric disorders are part of the epileptogenic process. These different domains parallel each other in a given time, although their pathophysiological processes are distinct. Thus seizures and neuronal damage co-exist but are not causally related.
Normalization of neuronal metabolic function is seen in post-operative seizure-free patients, with a recovery half time of six months. However, the process of neuronal recovery does not occur in patients who are seizure-free due to antiepileptic medication. The epileptogenic process causes disruption of normal neuronal network and in order to reverse this disruption the epileptogenic area must be isolated or resected surgically. The epileptic state is a translation in time of the activity of the epileptogenic process. Seizures, stereotyped behavioral manifestations, are the hallmark of the epileptogenic process, Absence of seizures, however, does not reflect inactivity of the epileptogenic process, Neuronal damage as measured by NAA/Cr can serve as a surrogate marker of the epileptogenic state.
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Sedaghat, Yasaman. "Combined static-dynamic deformations with haptic rendering." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106565.
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We present a real-time, physically based simulation method for animating high-resolution elastic deformations with a focus on haptic interaction. To achieve interactive rates without losing accuracy, the reduced material stiffness matrix is precomputed by removing the equations that correspond to the internal nodes of the system. In addition, we employ linear modal analysis to precompute the natural vibration modes of the system. We introduce a deformation-coupling technique in order to achieve the reduced dynamic behaviour while keeping the high-resolution local deformations. During real-time simulation, the high-spatial-frequency static deformations are coupled with the low-spatial-frequency dynamics, by projecting the reduced coordinate deformations onto an orthogonal basis constructed from natural vibration modes. To explore the implications of the coupling system, we describe different integration techniques to time-step the reduced dynamic solution in addition to evaluating the force feedback. Moreover, we show how we handle multiple contact points for non-sticky materials. To improve the contact-handling procedure, we employ our sliding technique to include friction. We compare our proposed method to the previously existing techniques in terms of run-time complexity and deformation properties using 3D meshes embedded in finite elements.Nous présentons une méthode de simulation temps réel conforme aux lois de la physique pour animer des déformations élastiques à haute résolution, tout en portant une attention particulière aux interactions haptiques. Pour obtenir un résultat permettant une interaction temps réel sans perte de précision, la matrice réduite de rigidité du matériau est précalculée en excluant les équations correspondant aux noeuds internes du système. De plus, nous avons recours à l'analyse modale linéaire pour pré-calculer les modes de vibration naturelle du système. Nous proposons une technique de couplage des déformations afin d'obtenir le comportement à dynamique réduite recherché tout en préservant les propriétés des déformations locales à haute résolution. Lors de la simulation temps réel, les déformations statiques à haute fréquence spatiale sont couplées à la dynamique spatiale réduite à basse fréquence en projetant les déformations en coordonnées réduites sur une base orthogonale construite à partir des modes de vibration naturelle. Afin d'explorer l'impact du système de couplage, nous décrivons différentes techniques d'intégration pour avancer la solution de dynamique réduite dans le temps tout en évaluant le retour de force haptique. De plus, nous détaillons notre approche pour la gestion de points de contact multiples pour des matériaux non-adhésifs ainsi que notre méthode pour la gestion du glissement. Nous comparons la méthode que nous avançons aux techniques existantes en termes de complexité du temps d'exécution et en termes des propriétés de déformation, et ce en utilisant un maillage 3D intégré à un système à éléments finis.
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Knüsel, Philipp. "Dynamic neuronal representations of static sensory stimuli /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16660.
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Vöcking, Berthold. "Static and dynamic data Management in networks /." Paderborn : HNI, 1998. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=008668511&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Silvera-Munoz, Raul E. "Static instruction scheduling for dynamic issue processors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/MQ44107.pdf.
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Li, Li Min. "Static and dynamic properties of epileptogenic lesions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0035/NQ64604.pdf.
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Winkler, B. "Static and dynamic models of mineral energetics." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385893.
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Griffiths, Peter Robert. "Static and Dynamic Components of Droplet Friction." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4897.
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As digital microfluidics has continued to mature since its advent in the early 1980's, an increase in new and novel applications of this technology have been developed. However, even as this technology has become more common place, a consensus on the physics and force models of the motion of the contact line between the fluid, substrate, and ambient has not been reached. This uncertainty along with the dependence of the droplet geometry on the force to cause its motion has directed much of the research at specific geometries and droplet actuation methods.
The goal of this thesis is to help characterize the components of the friction force which opposes droplet motion as a one dimensional system model based upon simple system parameters independent from the actuation method. To this end, the force opposing the motion of a droplet under a thin rectangular glass cover slip was measured for varying cover slip dimensions (widths, length), gap height between the cover slip and substrate, and bulk droplet velocity. The stiffness of the droplet before droplet motion began, the force at which the motion initiated, and the steady-state force opposing the droplet motion were measured. The data was then correlated to hypothesized equations and compared to simple models accounting for the forces due to the contact angle hysteresis, contact line friction, and viscous losses.
It was found that the stiffness, breakaway force, and steady-state force of the droplet could be correlated to with an error standard deviation of 8 %, 14%, and 10 % respectively. Much of the error was due to an unexpected height dependence for the breakaway and steady-state forces and testing error associated with the velocity. The models for the stiffness and breakaway force over predicted the results by 36% and 16% respectively. During testing,
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stability issues with the cover slip were observed and simple dye testing was conducted to visualize the droplet flow field.
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Friesecke, Gero. "Static and dynamic problems in nonlinear mechanics." Thesis, Heriot-Watt University, 1993. http://hdl.handle.net/10399/1458.
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Kennedy, Graeme J. "Static and dynamic aspects of angle perception." Thesis, Glasgow Caledonian University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443161.
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Andreadou, Anna. "Some static and dynamic finite elastic deformations." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.352956.
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Wilkie, J. "Static and dynamic optimisation with marine applications." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382414.
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Heaton, N. J. "Static and dynamic properties of liquid crystals." Thesis, University of Southampton, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375364.
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Hirst, Anthony John. "Adaptive evolution in static and dynamic environments." Thesis, Open University, 1998. http://oro.open.ac.uk/57869/.
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This thesis provides a framework for describing a canonical evolutionary system. Populations of individuals are envisaged as traversing a search space structured by genetic and developmental operators under the influence of selection. Selection acts on individuals' phenotypic expressions, guiding the population over an evaluation landscape, which describes an idealised evaluation surface over the phenotypic space. The corresponding valuation landscape describes evaluations over the genotypic space and may be transformed by within generation adaptive (learning) or maladaptive (fault induction) local search. Populations subjected to particular genetic and selection operators are claimed to evolve towards a region of the valuation landscape with a characteristic local ruggedness, as given by the runtime operator correlation coefficient. This corresponds to the view of evolution discovering an evolutionarily stable population, or quasi-species, held in a state of dynamic equilibrium by the operator set and evaluation function. This is demonstrated by genetic algorithm experiments using the NK landscapes and a novel, evolvable evaluation function, The Tower of Babel. In fluctuating environments of varying temporal ruggedness, different operator sets are correspondingly more or less adapted. Quantitative genetics analyses of populations in sinusoidally fluctuating conditions are shown to describe certain well known electronic filters. This observation suggests the notion of Evolutionary Signal Processing. Genetic algorithm experiments in which a population tracks a sinusoidally fluctuating optimum support this view. Using a self-adaptive mutation rate, it is possible to tune the evolutionary filter to the environmental frequency. For a time varying frequency, the mutation rate reacts accordingly. With local search, the valuation landscape is transformed through temporal smoothing. By coevolving modifier genes for individual learning and the rate at which the benefits may be directly transmitted to the next generation, the relative adaptedness of individual learning and cultural inheritance according to the rate of environmental change is demonstrated.
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PASQUETTI, EDUARDO. "STATIC AND DYNAMIC STABILITY OF GUYED TOWERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3709@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOTorres estaiadas são, em geral, estruturas bastante leves e esbeltas e que apresentam comportamento eminentemente não - linear. Assim, a análise de sua estabilidade sob cargas estáticas e dinâmicas é essencial para se ter um projeto econômico e seguro. Neste trabalho estuda-se a estabilidade estática e dinâmica de um modelo plano de torre estaiada. Especial atenção é dada à modelagem dos estais, que são modelados como elementos de mola (linear ou não -linear) ou como cabos inextensíveis. Faz-se, com base no princípio da energia potencial mínima, um estudo da carga crítica e do caminho pós-crítico. Um estudo paramétrico minucioso permite analisar a influência dos diversos parâmetros físicos e geométricos na estabilidade da torre e chegar às melhores configurações para os estais. Na análise dinâmica atenção especial é dada ao estudo paramétrico da freqüência natural. Com base nos resultados da análise estática, analisa-se também o comportamento global da torre em vibração livre e forçada. Em virtude das não linearidades, verifica-se que a torre pode apresentar diversos comportamentos típicos de sistemas não -lineares tais como saltos, bifurcações de período e caos.
Guyed towers are in general very light and slender structures and their behavior under static and dynamic loads is eminently nonlinear. Thus the analysis of its stability under static and dynamic loads is an essential step in obtaining an economic and safe project. In this work the static and dynamic stability analysis of a plain model of a guyed tower is studied. Special attention is given to the modeling of the stays; here they are modeled as spring elements (linear or nonlinear) or as inextensible cables. A study of the critical load and the postcritical nonlinear equilibrium paths is conducted based on the principle of the minimum potential energy A detailed parametric analysis is performed to identify the influence of the physical and geometric parameters of the system on the stability of the tower. This allows one to choose the best configurations for the stays. In the dynamic analysis special attention is given to the parametric study of the system natural frequencies. Based on the results of the static analysis, the global behavior of the tower under free and forced vibration is also analyzed. Due to the inherent nonlinearities, the tower may present dynamic responses typical of nonlinear systems such as jumps, period bifurcations and chaos.
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Leo, John 1964. "Dynamic process creation in a static model." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/14038.
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Varvarigos, Emmanouel A. "Static and dynamic communication in parallel computing." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12868.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.Includes bibliographical references (p. 186-191).
by Emmanouel A. Varvarigos.
Ph.D.
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Saltos, Atiencia Ramiro Javier. "Soft-clustering in static and dynamic environments." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/142058.
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Doctor en Sistemas de IngenieríaEn la actualidad, el entorno macro y micro económico en el cual op eran las empresas está cambiando constantemente y a gran velo cidad. Esto se deb e princip almente al auge de las nuevas tecnologías, la revolución de la información y la gran facilidad con la que ahora p o demos comu nicarnos con cualquier parte d el mundo. Debido a la gran canti dad de información que está siendo generada segundo tras segundo, junto con la facilidad con la que se puede acceder a ella, la minería de datos y la investigación de op eracion es se han convertido en una de las herramientas más imp ortantes para desarrollar sistemas de ap oyo a la toma de decisiones en to dos los niveles. La imp ortancia del traba jo conjunto de ambas disciplinas radica en la faci lidad relativa con la que extraen cono cimiento de enormes bases de datos y la utilizan para optimizar los pro cesos organizacionales relevantes. En particular, para la min ería de datos, estos hechos h an provo cado qu e las bases de datos sean dinámicas, es decir, el nà omero de datos disponibles crece cada segundo haciendo que tiempo de vida útil de los modelos se reduzca, haciendo necesario actualizarlos periódicamente de tal forma que encajen con la realidad actual. Lo anterior demanda el desarrollo de nuevos algoritmos que sean capaces de manejar este tipo de cambios, lo cual ha ido ganando importancia en los últimos años. Adicionalmente, la incertidumbre, ambigüedad e imprecisión presentes en los problemas de la vida real son factores muy importantes a considerar cuando se desarrollan diferentes algoritmos de minería de datos. La forma más común de lidiar con la incertidumbre viene dada por la teoría de probabilidad, sin embargo, la ambigüedad e imprecisión han sido dejadas de lado hasta la aparición de nuevas formas de tratarlas; dos de las cuales son la teoría de conjuntos " fuzzy" y "rough." Con las ideas anteriores en mente, en esta tesis, un algoritmo clásico de clustering basado en support vectors es estudiado profundamente y extendido a una versión rough-fuzzy con el fin de darle la habilidad de manejar la ambigüedad e imprecisión presente en el mundo real. Luego de esto, este novedoso algoritmo de soft-computing es generalizado a una versión dinámica siendo capaz de procesar bases de datos que reciben nueva información con el paso del tiempo. Finalmente, utilizando como base estos dos algoritmos, un método de detección de outliers es propuesto como una de las múltiples posibles aplicaciones que resultan de esta investigación. En cada capítulo, los experimentos computacionales, resultados y discusión son provistos enfatizando la contribución que este trabajo de investigación tiene para la sociedad señalando los futuros desarrollos y posibles campos de aplicación
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Siegkas, Petros. "Static and dynamic performance of Ti foams." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:68938d12-d104-4637-8b08-d1c126ddca84.
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Titanium (Ti) foams of different densities 1622-4100 Kgm-3 made by a powder sintering technique were studied as to their structural and mechanical properties. The foams were tested under static and dynamic loading. The material was tested quasi statically and dynamically under strain rates in the range of 0.001-2500 s-1 and under different loading modes. It was found that strain rate sensitivity is more pronounced in lower density foams. Experiments were complimented by virtual testing. Based on the Voronoi tessellations a computational method was developed to generate stochastic foam geometries. Statistical control was applied to produce geometries with the microstructural characteristics of the tested material. The generated structures were numerically tested under different loading modes and strain rates. Voronoi polyhedrals were used to form the porosity network of the open cell foams. The virtually generated foams replicated the geometrical features of the experimentally tested material. Meshes for finite element simulations were produced. Existing material models were used for the parent material behaviour (sintered Ti) and calibrated to experiments. The virtual foam geometries of different densities were numerically tested quasi statically under uniaxial, biaxial and triaxial loading modes in order to investigate their macroscopic behaviour. Dynamic loading was also applied for compression. Strain rate sensitive and insensitive models were used for the parent material model in order to examine the influence of geometry and material strain rate sensitivity under high rates of deformation. It was found that inertial effects can enhance the strain rate sensitivity for low density foams and numerical predictions for the generated foam geometries were in very good agreement with experimental results. Power laws were established in scaling material properties with density. The study includes: 1. Information on the material behaviour and data for macroscopically modelling this type of foams for a range of densities and under different strain rates. 2. A proposed method for virtually generating foam geometries at a microscopic scale and examine the effect of geometrical characteristics on the macroscopic behaviour of foams.
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Lehtosalo, Jukka Antero. "Adapting dynamic object-oriented languages to mixed dynamic and static typing." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708510.
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Rebello, Gayle, and n/a. "Measuring dynamic hamstring flexibility: Dynamic versus static stretching in the warm-up." University of Canberra. School of Health Sciences, 2006. http://erl.canberra.edu.au./public/adt-AUC20070618.095511.
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The main purpose of this study was to compare the acute effects of static and dynamic stretching
in the warm-up, on hamstring flexibility using a reliable set-up for measurement.
Static and dynamic flexibility was measured using five modifications of the Straight Leg Raise
(SLR) test to measure hip flexion range of motion (ROM). In the first part of the study (n = 33)
hamstring flexibility was measured using a Static-passive, Static-active, Dynamic-supine and
Dynamic-standing tests. The results of this study were used to calculate reliability statistics and
to compare the various static and dynamic flexibility tests. There was a significant difference
between Static-passive (SPH) and the Dynamic-supine (DSUH) tests (p less than .05).
This was followed by an intervention study (n = 12) where participants were randomly assigned
to three intervention treatments of 225 seconds on separate days: No stretching (Treatment I),
Static stretching (Treatment 2) and Dynamic stretching (Treatment 3) in a cross-over study
design. Static stretching had no impact on dynamic hamstring flexibility; however, dynamic
stretching improved dynamic flexibility while simultaneously increasing static flexibility. This
has implications for the specificity of stretching in sport.
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PONTES, BRUNO DO CARMO. "STATIC AND DYNAMIC SIMULATION FOR THE VOLTAGE CONTROL BY LTC AND STATIC VOLTAGE COMPENSATOR." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13043@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROO tema abordado neste trabalho é a observação e análise, em regime permanente e dinâmico, da ocorrência de um fenômeno que já foi observado em condições reais de operação do sistema elétrico brasileiro, que é a relação oposta à usual entre a grandeza controlada e a grandeza controladora. Nestes caso, mesmo que haja margem de recursos para manter a tensão controlada, ela não é útil. Por exemplo, uma diminuição na relação de transformação num transformador de tapes variáveis, com intuito de aumentar a tensão controlada acaba por reduzí-la, até que os limites de troca de tapes sejam atingidos ou o sistema entre em colapso. Para demonstrar a existência do problema, foram executadas simulações, em regime permanente e dinâmico, e verificado o efeito do controle de tensão por um transformador com tapes variáveis e por compensadores estáticos de potência reativa, situações corriqueiras de um sistema de potência. Foram demonstradas situações em que foi possível verificar a mudança da região de operação. Para a análise em regime permanente foi utilizado um algoritmo de fluxo de carga, e para a análise dinâmica, uma simulação no domínio do tempo. Nas simulações envolvendo transformadores de tapes variáveis, foi possível verificar a existência o efeito reverso da ação de controle de tensão nas análises estática e dinâmica. Nas simulações utilizando o compensador estático de potência reativa houve divergência entre os resultados das duas análises.
This work presents the observation and analysis, in steady state and dynamic performance, of the phenomenon already observed in real operation conditions of the Brazilian Electric System, which is the opposite relationship between the controlled value and the target value. In this case, even if the resources have margin to keep the voltage controlled, this is not useful. For example, the reduction in the turn ratio on load tap changer transformer, with the aim of increase in the controlled voltage, result in its reduction, until the tap changer limit is reached or the system is led to the collapse. To demonstrate the existence of this problem, steady state and dynamic performance simulations were done, and the voltage control effect by on load tap changer transformer and static var compensator , current situations in a power system. Several situations where is possible verify the operation region changing was demonstrated. For steady state analysis was used a load flow algorithm and, for the dynamic analysis, a time domain simulation. In the simulations with on load tap changer transformer, it was possible to verify the existence of the reverse effect of the voltage control action in the static and dynamic analysis. In the simulations using static var compensator, a divergence was found between the results in the two analyses.
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Erdal, Feride. "Web Market Analysis: Static, Dynamic And Content Evaluation." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614694/index.pdf.
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Importance of web services increases as the technology improves and the need for the challenging e-commerce strategies increases. This thesis focuses on web market analysis of web sites by evaluating from the perspectives of static, dynamic and content. Firstly, web site evaluation methods and web analytic tools are introduced. Then evaluation methodology is described from three perspectives. Finally, results obtained from the evaluation of 113 web sites are presented as well as their correlations.
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Eng, David 1978. "Combining static and dynamic data in code visualization." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=78356.
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The task of developing, tuning, and debugging compiler optimizations is a difficult one which can be facilitated by software visualization. There are many characteristics of the code which must be considered when studying the kinds of optimizations which can be performed. These characteristics can include large amounts of data which would be difficult to inspect without the appropriate tools. Both static data collected at compile-time and dynamic runtime data can reveal opportunities for optimization and affect code transformations. In order to expose the behavior of such complex systems, visualizations should include as much information as possible and accommodate the different sources from which this information is acquired.This thesis presents a visualization framework designed to address these issues. The framework is based on a new, extensible language called JIL which provides a common format for encapsulating intermediate representations and associating them with compile-time and runtime data. We present new contributions which extend existing compiler and profiling frameworks, allowing them to export the intermediate languages, analysis results, and code metadata they collect as JIL documents. Visualization interfaces can then combine the JIL data from separate tools, exposing both static and dynamic characteristics of the underlying code. We present such an interface in the form of a new web-based visualizer, allowing JIL documents to be visualized online in a portable, customizable interface.
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Grimsmo, Nils. "Dynamic indexes vs. static hierarchies for substring search." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9225.
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This report explores the problem of substring search in a dynamic document set. The operations supported are document inclusion, document removal and queries. This is a well explored field for word indexes, but not for substring indexes. The contributions of this report is the exploration of a multi-document dynamic suffix tree (MDST), which is compared with using a hierarchy of static indexes using suffix arrays. Only memory resident data structures are explored. The concept of a ``generalised suffix tree'', indexing a static set of strings, is used in bioinformatics. The implemented data structure adds online document inclusion, update and removal, linear on the single document size. Various models for the hierarchy of static indexes is explored, some which of give faster update, and some faster search. For the static suffix arrays, the BPR cite{SS05} construction algorithm is used, which is the fastest known. This algorithm is about 3-4 times faster than the implemented suffix tree construction. Two tricks for speeding up search and hit reporting in the suffix array are also explored: Using a start index for the binary search, and a direct map of global addresses to document IDs and local addresses. The tests show that the MDST is much faster than the hierarchic indexes when the index freshness requirement is absolute, and the documents are small. The tree uses about three times as much memory as the suffix arrays. When there is a large number of hits, the suffix arrays are slightly faster on reporting hits, as there they have better memory locality. If you have enough primary memory, the MDST seems to be the best choice in general.
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Wahba, Yohanna M. F. "Static and dynamic analyses of guyed antenna towers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0008/NQ52445.pdf.
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Nandurkar, Kuldeep Pandurang. "Static and Dynamic Behavior of Stress Coated Membranes." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/nandurkar/NandurkarK0806.pdf.
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Large space mirrors need to be made of ultra-lightweight materials (membranes) that have very low densities and high flexibility (compliance) for packaging. A coating application necessary for optical reflectivity may also impart to these ultra-lightweight materials a desired shape and to help maintain that shape in the harsh environment of space. When a coating is applied on the membrane substrate, stresses develop in the coating due to atomistic processes. These stresses are fundamental to the final shape of the substrate. Coatings applied to the substrate in order to maintain a particular shape are known as the 'stress coating prescription'. As there is no way one could directly measure stresses in the coatings experimentally, in this work it will be explained how finite element analysis (FEA) was used in estimating stresses in the coatings. This work mainly comprises static pressuredeflection tests (bulge tests) on the coated and uncoated membranes, and a comparison of the experimental results to FEA findings in order to estimate the stresses in the coatings. Before FEA results are matched with the experimental results, an analytical solution to the problem in hand will be derived. Uncertainties due to variation in coating thicknesses and difficulties in coating process have led to various uncertainties in this work, and these uncertainties are also discussed. The ability to use changes in vibration frequency as a measure of coating stress is also investigated.
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Davies, Timothy J. "Static, dynamic and fatigue characteristics of helical cables." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/10916.
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Extensive parametric studies have been carried out, using the orthotropic sheet theoretical model of Hobbs and Raoof, on a wide range of spiral strand constructions, with outside diameters, d, and lay angles, a, in the practical ranges, 16.4 mm ≤ d ≤ 184 mm, and 11 ≤ α ≤24 , respectively. The effects of an external hydrostatic pressure on certain structural characteristics of sealed spiral strands, used in deep water applications, have also been studied in some detail, for water depths ranging from 0 m to 2000 m. The results, based on such theoretical parametric studies, have, for example, been used to refute claims by Jolicoeur that, by a simple modification, a significant improvement to the original orthotropic sheet model of Hobbs and Raoof , had been found. In addition, using such studies, axial fatigue life design S-N curves have been developed, which cater for the effects of an externally applied hydrostatic pressure on sheathed spiral strands. Simple (hand-based) formulations have also been developed for estimating the maximum frictional axial and torsional hysteresis along with ,the associated axial load range/mean axial load, and range of twist/2, respectively, at which they occur, relating to both, the in-air conditions and also when a sheathed spiral strand is subjected to an external hydrostatic pressure. The previously reported work of Raoof and his associates, in connection with the response of helical cables (spiral strands and/or wire ropes) to impact loading, has been extended to include the development of closed-form solutions for predicting the extensional-torsional wave speeds and displacements, in axially preloaded helical cables, experiencing a half-sine type of impact loading at one end, with the other end fixed. The influence of the lay angle on the response of a spiral strand to three different (i.e. unit-step, triangular and half-sine) forms of impact loading functions, has also been analysed, with much emphasis placed on the practical implications of the final results in connection with non-destructive methods of wire fracture detection under service conditions.
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Melas, Dimitris. "Optimal investment decisions in static and dynamic environments." Thesis, London School of Economics and Political Science (University of London), 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551337.
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This thesis addresses three optimisation problems. The first problem concerns static portfolio optimization. Empirical evidence suggests that asset dynamics can be characterised by a multifactor representation of asset returns. In this context, investors can capture the premium or hedge the risk associated with a particular factor through factor-mimicking portfolios. We examine different methods for constructing optimal factor-mimicking portfolios. We provide analytical considerations in the construction of factor-mimicking portfolios, along with empirical evidence. Also, we illustrate potential practical applications of factor-mimicking portfolios in the institutional investment process. The second problem addresses continuous time optimal consumption and investment for an agent investing in a complete arbitrage-free market consisting of several risky assets and a bank account. In particular, we consider a general model in which the agent's preferences exhibit a linear habit formation pattern that captures the effect of past consumption on current utility. Using duality methods, we establish the existence of an optimal consumption and investment strategy. We also prove that the optimal portfolio consumption pair can be expressed in terms of the solution to the Hamilton-Jacobi-Bellman equation that the problem's value function satisfies. The third problem concerns a general one-dimensional lro diffusion which must be maintained within an externally specified bounded interval by means of an impulse control process. We minimise a long-term average criterion that penalises deviations of the state process from a given nominal point within this region as well as the use of impulsive control effort. We solve the resulting optimisation problem and we provide an explicit optimal control strategy under general assumptions. The model that we study is motivated by several applications, including the problem of determining an optimal central bank intervention strategy aiming at the control of an exchange rate or an inflation rate, as well as the problem of designing optimal contribution policies in defined benefit pension plans.
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O'Connor, J. P. F. "The static and dynamic analysis of arch dams." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371484.
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Kim, Kun Suk. "Data structures for static and dynamic router tables." [Gainesville, Fla.] : University of Florida, 2003. http://purl.fcla.edu/fcla/etd/UFE0000956.
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Ko, Albert Hung-Ren. "Static and dynamic selection of ensemble of classifiers." Thèse, Montréal : École de technologie supérieure, 2007. http://proquest.umi.com/pqdweb?did=1467895171&sid=2&Fmt=2&clientId=46962&RQT=309&VName=PQD.
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Thèse (Ph.D.) -- École de technologie supérieure, Montréal, 2007."A thesis presented to the École de technologie supérieure in partial fulfillment of the thesis requirement for the degree of the Ph.D. engineering". CaQMUQET Bibliogr. : f. [237]-246. Également disponible en version électronique. CaQMUQET
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FERREIRA, LUIS FERNANDO. "STATIC AND DYNAMIC SIMULATION FOR GENERATOR VOLTAGE CONTROL." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9454@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOO problema tratado nesta dissertação é a relação oposta entre a tensão de excitação de geradores e compensadores síncronos e a tensão controlada, quando o sistema de transmissão da área encontra-se muito carregado. Neste caso, a capacidade nominal de um gerador / compensador não seria útil para manter a tensão controlada. Devido à relação oposta, uma maior excitação da máquina iria abaixar a tensão controlada. O controle automático iria continuar agindo, abaixando ainda mais a tensão. Este mecanismo pode levar o sistema ao colapso e foi verificado em ponto de operação real do sistema brasileiro. Esse fenômeno ocorre quando a injeção de potência na rede de transmissão ou distribuição é elevada. Com o advento da geração distribuída, co-geração e produtores independentes, usualmente conectados à rede existente em níveis de tensão mais baixas, têm-se observado ocorrências do fenômeno. O objetivo do trabalho é então entender melhor as situações operativas reais que levam à ocorrência do fenômeno, principalmente quando existem vários equipamentos de controle de tensão ao redor do gerador em análise. A abordagem do problema baseou-se na verificação do comportamento do gerador / compensador como dispositivo de controle de tensão, no domínio do tempo e em regime permanente. Avaliaram-se as ações de controle do mesmo a partir de sete tipos de análise distintas para pontos de operação na região normal e anormal da curva SV. A real existência do fenômeno foi comprovada através de algumas destas análises. Porém, conclui-se que nem todas as formas de análise no domínio do tempo fazem uma avaliação completa do fenômeno. Dentre essas, estão a análise dinâmica agregada e a análise dinâmica agregada sob influência dos equipamentos de controle de tensão, que para pontos de operação na região anormal da curva SV não responderam em concordância com os outros tipos de análise.
The problem addressed in this research is the opposite relationship between the , synchronous generator / compensator excitation voltage and the controlled voltage when nearby network is heavily loaded. In this situation, the nominal capacity of a generator / compensator would not keep the voltage controlled. Due to the opposite relationship, the higher the excitation voltage the lower is the controlled voltage. So, the automatic control would continue acting lowering the voltage. This mechanism, verified in a real operational point of the Brazilian Electric System, can lead the system to collapse. This phenomenon occurs when the power injection into the network is high. It is prone to occur in the new scenario of distributed generation connected to already existing low voltage networks. The objective of this work is to understand the actual operative situations that lead to the occurrence of the phenomenon, mainly when there are several voltage control devices nearby the generator. The analysis of the problem was based on the verification of the generator behaviour as a voltage control device, in time domain simulation and in steady state. The control actions were evaluated from seven different ways for operating points in the normal and the abnormal region of the SV curve. The actual existence of the phenomenon was proven through some of these analyses. However, some of the time domain simulations did not evaluated the phenomenon completely. Among them, the aggregated dynamic analysis and the aggregated dynamic analysis under influence of other voltage control devices have not got the expected responses for the abnormal region of the SV curve, in comparison with other analysis.
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Huang, Xuejiao. "Meshless investigation for nonlocal elasticity : static and dynamic." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24643.
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The numerical treatment of nonlocal problems, which taking into account material microstructures, by means of meshless approaches is promising due to its efficiency in addressing integropartial differential equations. This thesis focuses on the investigation of meshless methods to nonlocal elasticity. Firstly, mathematical constructions of meshless shape functions are introduced and their properties are discussed. Shape functions based upon different radial basis function (RBF) approximations are implemented and solutions are compared. Interpolation errors of different meshless shape functions are examined. Secondly, the Point Collocation Method (PCM), which is a strong-form meshless method, and the Local Integral Equation Method (LIEM) that bases on the weak-form, are presented. RBF approximations are employed both in PCM and LIEM. The influences of support domains, different kinds of RBFs and free parameters are studied in PCM. While in LIEM, analytical forms of integrals, which is new in meshless method, is addressed. And, the number of straight lines that enclose the local integral domain as well as the integral radius are analyzed. Several examples are conducted to demonstrate the accuracy of PCM and LIEM. Besides, comparisons are made with Abaqus solutions. Then, PCM and LIEM are applied to nonlocal elastostatics based on the Eringen's model. Formulations of both methods are reported in the nonlocal frame. Numerical examples are presented and comparisons between solutions obtained from both methods are made, validating the accuracy and effectiveness of meshless methods for solving static nonlocal problems. Simultaneously, the influence of characteristic length and portion factors are investigated. Finally, LIEM is employed to solve nonlocal elastodynamic problems. The Laplace transform method and the time-domain technique are implemented in LIEM respectively as the time marching schemes. Numerical solutions of both approaches are compared, showing reasonable agreements. The influence of characteristic length and portion factors are investigated in nonlocal dynamic cases as well.
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Attwood, Julia Patton. "Static and dynamic properties of polyethylene fibre composites." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709355.
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Balas, Benjamin J. (Benjamin John). "Learning about dynamic objects and recognizing static form." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39004.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Brain and Cognitive Sciences, 2007.Includes bibliographical references.
The effects of observed object motion on object perception are examined in two sets of studies. The first section of the thesis provides a thorough examination of various untested aspects of the basic "temporal association" hypothesis, which suggests that object motion provides a principled basis for linking distinct images together if they appear within small time intervals. Using familiar and unfamiliar objects undergoing various forms of non-rigid motion, I ask how well this simple hypothesis predicts behavior in change detection and categorization tasks. The results favor a modified version of the hypothesis which operates over a population of units, such that increases in generalization also produce increases in image sensitivity. The observed effects of long-term knowledge concerning object appearance and expected patterns of motion also force additional modifications of the initial hypothesis to incorporate interactions between learned predictions and recent experience. Specifically, the tendency to alter patterns of generalization following dynamic exposure appears to be contingent on the stability of the direction of movement through appearance space.
(cont.) Consistent with this expanded model, performance in our categorization task appears to depend heavily on whether or not a coherent direction of movement through appearance space can be determined across both categories to be learned. In the second section of the thesis, I report the results of two parametric analyses of image encoding following dynamic exposure. In each case, I ask how the movement of an object up to the presentation of particular image affects an observers' ability to accurately recall that image. Novel, rigidly rotating objects are used in both cases to characterize the influence of appearance dynamics on short and long-term image encoding. In both cases, I find that local appearance change over time exerts a powerful influence on encoding, suggesting that both immediate percepts and visual memory are modulated by the recent past. The result is a complex picture of dynamic object perception that goes far beyond the basic principle of object motion as a tool for learning invariant recognition.
by Benjamin J. Balas.
Ph.D.
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Singer, Neil C. "Utilizing dynamic and static stability to orient parts." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15316.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.
Bibliography: leaves 141-143.
by Neil C. Singer.
M.S.
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Quartermain, Brian. "Static and dynamic pre-stressing of metal discs." Thesis, Sheffield Hallam University, 1985. http://shura.shu.ac.uk/20257/.
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In order to develop a technique of controlled prestressing of metal components, mild steel discs were dynamically loaded using explosives. Subsequently, mild steel discs of similar dimensions were loaded statically. The following loading conditions were studied:(i) at fixed radius and varying load (ii) at varying radial positions and fixed load (iii) at constant load and fixed radius but varying outer diameter of disc (dynamic tests only).For the dynamically loaded discs, residual radial stresses have been obtained by an experimental technique, based on strain gauge readings, which permitted the estimation of the residual stresses at the incremental radius of the successively cut sections of the discs for both outer and inner sections. Further analysis of the experimental results has produced values for the residual radial and hoop stress at radii close to the explosive loading radius. Correlation from results obtained from the statically loaded discs was provided by strain gauges fixed at varying fixed radii on each-loaded disc. The experimental analysis for the statically loaded discs was of simpler form than that required for the dynamically loaded discs. In order to establish the validity of the method for estimating the residual radial stresses, certain other experimental measurements have been made viz: planedeformation, hardness, microstructural examination and buckling tests. A theoretical model based on plastic deformation of the loaded annulus has been developed which requires an estimation of the energy transferred from the loading ring or annulus to the surface of the disc. In the majority of cases, agreement between experimental and theoretical values of residual radial and hoop stress have been found in both magnitude and sign. A further theoretical approach was applied using finite element technique to validate the equivalent stress values obtained from the experimental results of the statically loaded discs. Comparison of the results again showed good agreement in magnitude and sign.
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Jiang, Shouyong. "Evolutionary algorithms for static and dynamic multiobjective optimization." Thesis, De Montfort University, 2016. http://hdl.handle.net/2086/14224.
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Many real-world optimization problems consist of a number of conflicting objectives that have to be optimized simultaneously. Due to the presence of multiple conflicting ob- jectives, there is no single solution that can optimize all the objectives. Therefore, the resulting multiobjective optimization problems (MOPs) resort to a set of trade-off op- timal solutions, called the Pareto set in the decision space and the Pareto front in the objective space. Traditional optimization methods can at best find one solution in a sin- gle run, thereby making them inefficient to solve MOPs. In contrast, evolutionary algo- rithms (EAs) are able to approximate multiple optimal solutions in a single run. This strength makes EAs good candidates for solving MOPs. Over the past several decades, there have been increasing research interests in developing EAs or improving their perfor- mance, resulting in a large number of contributions towards the applicability of EAs for MOPs. However, the performance of EAs depends largely on the properties of the MOPs in question, e.g., static/dynamic optimization environments, simple/complex Pareto front characteristics, and low/high dimensionality. Different problem properties may pose dis- tinct optimization difficulties to EAs. For example, dynamic (time-varying) MOPs are generally more challenging than static ones to EAs. Therefore, it is not trivial to further study EAs in order to make them widely applicable to MOPs with various optimization scenarios or problem properties. This thesis is devoted to exploring EAs’ ability to solve a variety of MOPs with dif- ferent problem characteristics, attempting to widen EAs’ applicability and enhance their general performance. To start with, decomposition-based EAs are enhanced by incorpo- rating two-phase search and niche-guided solution selection strategies so as to make them suitable for solving MOPs with complex Pareto fronts. Second, new scalarizing functions are proposed and their impacts on evolutionary multiobjective optimization are exten- sively studied. On the basis of the new scalarizing functions, an efficient decomposition- based EA is introduced to deal with a class of hard MOPs. Third, a diversity-first- and-convergence-second sorting method is suggested to handle possible drawbacks of convergence-first based sorting methods. The new sorting method is then combined with strength based fitness assignment, with the aid of reference directions, to optimize MOPs with an increase of objective dimensionality. After that, we study the field of dynamic multiobjective optimization where objective functions and constraints can change over time. A new set of test problems consisting of a wide range of dynamic characteristics is introduced at an attempt to standardize test environments in dynamic multiobjective optimization, thereby aiding fair algorithm comparison and deep performance analysis. Finally, a dynamic EA is developed to tackle dynamic MOPs by exploiting the advan- tages of both generational and steady-state algorithms. All the proposed approaches have been extensively examined against existing state-of-the-art methods, showing fairly good performance in a variety of test scenarios. The research work presented in the thesis is the output of initiative and novel attempts to tackle some challenging issues in evolutionary multiobjective optimization. This re- search has not only extended the applicability of some of the existing approaches, such as decomposition-based or Pareto-based algorithms, for complex or hard MOPs, but also contributed to moving forward research in the field of dynamic multiobjective optimiza- tion with novel ideas including new test suites and novel algorithm design.
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Troumbley, Patrick. "Static Versus Dynamic Stretching Effect on Agility Performance." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/695.
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The purpose of this study was to compare effects of static and dynamic stretching on explosive agility movements, and to examine the effect of the interaction of dynamic and static stretching prior to explosive agility movements. Fourteen men and 10 women performed the different warm-up protocols, including no warm-up (NWU), static stretching (SS), dynamic stretching (DS), and dynamic stretching with static stretching (DS+SS). The T-Drill was used to assess agility. The results indicated no difference between the NWU and SS conditions (effect size = 0.40, p = 0.06), as well as no significant difference between the NWU and DS+SS conditions (effect size = 0.01, p = 0.48), and the SS and DS+SS conditions (effect size = 0.40, p = 0.06). Statistically significant differences were found between the NWU and DS conditions (effect size = 0.45, p = 0.03), the SS and DS conditions (effect size = 0.85, p < 0.001), and the DS and DS+SS conditions (effect size = 0.40, p = 0.03). Agility test times, in order from fastest to slowest, were (a) dynamic stretching (10.87 ± 1.07 s), (b) dynamic stretching + static stretching (11.41 ± 1.26 s), (c) no warm-up (11.42 ± 1.21 s), (d) static stretching (11.90 ±1.35 s). Dynamic stretching resulted in the fastest agility test time. Static stretching resulted in the slowest agility times. The benefits of dynamic stretching may have been diluted when followed by Static Stretching, and the agility test time was the same as if no form of stretching was completed. Static stretching prior to agility is not recommended as it has a negative effect on the stretch shortening cycle, and agility. The results support the use of dynamic stretching prior to agility performance.
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Sawin, Jason E. "Improving the Static Resolution of Dynamic Java Features." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1248652226.
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Chung, Jean Soo. "Static and dynamic properties of arrays of superconductors /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu148759165817575.
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Rehnberg, Oscar. "Static vs Dynamic Weather Systems in Video Games." Thesis, Malmö universitet, Malmö högskola, Institutionen för datavetenskap och medieteknik (DVMT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-40220.
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Research has shown that creating uniformity in video games has a larger potential to be objectively good. Realistic video games can create uniformity by implementing a dynamic weather system. The purpose of this thesis is to compare dynamic and static weather and their contribution to the overall player satisfaction. Three weather components were created: wind, rain and clouds. Which weather component that creates the most enjoyment have been examined. Two virtual environments, one dynamic and one static, were created and a test group answered a questionnaire regarding the simulations. Results indicate that dynamic weather is preferred over static weather regarding overall satisfaction.
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Mercier, Joseph Alexander. "Static and dynamic properties of semiconductor laser arrays." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392368.
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