Dissertations / Theses on the topic 'Projection de performance'
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1
Hagerman, James B. "Speak the Speech: Lessons in Projection, Clarity and Performance." Otterbein University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=otbn1589913342610542.
2
Hsu, Shu-Ting. "High performance micro scanners for miniature laser projection displays." Dresden TUDpress, 2009. http://d-nb.info/996064125/04.
3
Knapton, Benjamin W. "Using digital projection to evoke aesthetic ideas in performance." Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/78129/1/Benjamin_Knapton_Thesis.pdf.
Abstract:
This practice-led research project investigated the use of digital projection as a compositional tool in live performance. The project was carried out through the creation of a new Australian theatre work called Genesis that poetically integrated digital projection and live performance. The investigation produced a framework for creating powerful theatrical sequences where the themes and ideas of the show were embedded inside particular performance gestures prompting an expanded aesthetic perception of the content.
4
Chau-Dang, Tiffanie T. "Using Optical Illusions to Enhance Projection Design for Live Performance." Kent State University Honors College / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1588376296563101.
5
Gavoille, Clément. "Approche de projection de performance pour l’exploration de paramètres de conception de l’environnement Arm en HPC." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0004.
Abstract:
La science d’aujourd’hui utilise de plus en plus la simulation pour modéliser et comprendre le monde qui nous entoure. Pour permettre à celles-ci d’être plus rapides, précises et modélisant de plus grand phénomènes, les scientifiques utilisent des supercalculateurs, domaine d’expertise du Calcul Haute-Performance. Or, à mesure que la demande en puissance de calcul grandit, ces machines se doivent d’être de plus en plus performantes. Seulement, la réduction de la taille des transistors prévue par la loi de Moore ne suffit plus à diriger l’évolution des processeurs, noyau de la puissance des supercalculateurs. Ainsi, pour continuer à être capable de répondre à cette demande, ces machines deviennent de plus en plus complexes. Et les performances des applications HPC dépendent des interactions entre les nombreux comportements des applications, les architectures des processeurs de plus en plus complexes et des choix faits par les différentes piles logicielle. Les efforts à fournir pour l’optimisation des performances des applications sur les machines sont donc de plus en plus importants. Une solution pour simplifier ces efforts d’optimisation et obtenir de meilleures performances des applications est de rassembler l’ensemble des acteurs du HPC dans un environnement de codesign pour la conception des futures machines. Ainsi, dans un tel environnement où les choix faits par les concepteurs sont dirigés par les intérêts des applications, les processeurs et la pile logicielle seront adaptés aux besoins des futurs utilisateurs. Cela est encore plus important depuis la récente arrivée de l’environnement Arm en HPC, représentant 10% de la puissance de calcul totale du Top500 avec seulement 6 machines. En effet, celui-ci offre une plus grande liberté aux constructeurs dans les choix des caractéristiques des processeurs. Seulement, dans un tel environnement de codesign, il est nécessaire d’utiliser une approche de prédiction de performance prenant en compte l’impact des choix faits par l’ensemble des acteurs pour pouvoir effectuer une exploration viable de l’espace de conception. Au cours de cette thèse, nous mettons en place une approche de projection de performance adaptée à notre définition d’un environnement de codesign regroupant les acteurs et les aspects des performances des applications en 3 groupes : l’application, la pile logicielle et le matériel. Ce modèle se présente en trois étapes pour effectuer la projection d’un triplet application/pile logicielle/matériel source, et accessible, vers un futur triplet cible d’intérêt, et inaccessible. Ces étapes sont : la caractérisation des performances sur nos trois aspects, suivi de l’analyse des performances sur le triplet source qui va enfin conduire à une projection des performances vers le triplet cible en fonction des différences entre les paramètres de celui-ci et du triplet source. Cette approche est ensuite implémentée à l’aide d’une représentation fondée sur le modèle Roofline dans laquelle on se concentre sur le maximum de performance atteignable par les triplets et on projette les performances avec une hypothèse de conservation de l’efficacité architecturale. Nous utilisons ensuite ce modèle pour l’analyse et l’exploration de paramètres matériels tels que la taille des vecteurs ou le choix du type de mémoire sur différentes architectures de coeurs Arm. Enfin, nous étendons cette exploration à des architectures multicoeurs en affinant la caractérisation de la bande passante et le travail effectués par chaque coeur. L’utilisation de cette approche se concentre sur l’exploration de paramètres applicatifs et de pile logicielle sur une future architecture d’intérêt pour le HPC : le processeur EPI (pour European Processor Initiative)Today’s science increasingly uses simulation to model and understand the world around us. To improve their speed, accuracy, and modeling capabilities, scientists rely on supercomputers, the domain of expertise of High-Performance Computing. As the demand for computing power keeps growing, these machines must become ever more powerful. However, the reduction in transistor size predicted by Moore’s Law is no longer sufficient to drive the evolution of processors, the core of supercomputer power. Hence, these machines are becoming increasingly complex to answer this increasing demand. The performance of HPC applications depends on interactions between varied application behavior, a complex processor architecture, and the choices made by the software stack. As a result, optimizing applications’ performance on these machines is a tedious task. One solution to simplify optimization efforts and improve applications’ performance is to bring together all HPC actors in a codesign environment for designing future machines. In an environment where the interests of applications drive the choices made by constructors, the processors and software stack will be adapted to the needs of future users. It is all the more vital with the recent arrival of the Arm environment in HPC, already representing 10% total computing power of the Top500 with just six machines, because this environment offers manufacturers great freedom in their choice of processor characteristics. However, in such a codesign environment, it is mandatory to use a performance prediction approach that accounts for the impact of the choices made by all players to drive the design-space exploration. In this thesis, we implement a performance projection approach adapted to our definition of a codesign environment that groups the actors and aspects of application performance into three groups: the application, the software stack, and the hardware. This model takes the form of a three-step process for projecting an accessible application/software stack/source hardware triplet onto a future target triplet of interest, which is inaccessible. These steps are performance characterization of our three aspects, followed by performance analysis on the source triplet, which finally leads to a projection of performance towards the target triplet as a function of the differences between its parameters and those of the source triplet. Then, we implement this approach using a Roofline model representation, in which we focus on the maximum performance attainable by the triplets and project performance with an assumption of architectural efficiency conservation. We then use this model to analyze and explore hardware parameters such as hardware vector size and choice of memory type on different Arm core architectures. Finally, we extend this exploration to multi-core architectures by refining the characterization of the bandwidth and the workload of each core. Then, we use this extension for the exploration of application and software stack parameters on a future HPC architecture of interest: the EPI (European Processor Initiative) processor
6
Choi, Dongsoo. "Susannah." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78004.
Abstract:
Susannah is the opera written and composed by American composer Carlisle Floyd in 1955. The opera is based on a story from the Biblical Apocrypha. For the live performance of this opera at the Jefferson Center in Roanoke, I designed the animations that projected onto a screen which was designed and fitted as a part of the set design. I created the series of animations that enhanced the story of the entire length of the opera. This project was in collaboration with Opera Roanoke's 2016-2017 season. Carlisle Floyd's Susannah was performed at the Jefferson Center in Roanoke, Virginia on April 28 and 30, 2017.Master of Fine Arts
7
Alwathainani, Abdulaziz. "Do Investors Over-react to Patterns of Past Financial Performance Measures?" VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd/756.
Abstract:
The objectives of this thesis are threefold. First, this dissertation examines whether patterns (growth and consistency in growth) of firms' past financial performance influence investors' perceptions about stock values and future performance of these firms. Second, multiple estimation horizons of past performance variables (ranging from one to five years) are used to assess whether the interaction between growth patterns and measurement interval lengths of these variables influence investor expectations. Third, this thesis examines whether an intermediate price drifts (e.g. Jegadeesh and Titman [1993]) and subsequent long-horizon price reversal (e.g. DeBondt and Thaler (1985)] are manifestations of a market over-reaction as suggested in recent studies (e.g. Lee and Swaminathail [2000]).Annual data on sales, earnings, cash flow, and stock returns over various time periods from a sample of publicly traded firms listed on the NYSE, AMEX, and NASDAQ exchanges from 1983 to 1999 are used to address the research questions proposed in this thesis. The evidence provided in this study shows that low-growth firms outperform their high-growth firm counterparts across different performance variables, estimation intervals, and investment horizons except in the first post-formation year for firms ranked by their prior one-year financial growth rate (except for sales growth). These return differentials between low and high growth firms increase uniformly as more years of past financial performance added.Furthermore, when ranking firms based on the consistency of their prior financial growth rates over multiple estimation periods, this study finds that a firm consistently achieving low (high) growth rates that places it in the lowest (highest) growth 40 percent earns high (low) stock returns. The consistency in a firm's prior financial performance influences the behavior of its future stock returns, i.e. the longer the consistency of exceptionally strong (weak) performance of a firm, the greater (lower) its subsequent stock returns. However, the incremental impact of an additional year of growth consistency on future returns seems to dissipate after the third year of prior performance data, suggesting that it may not take investors longer than three years to assume that a firm's past growth will continue for many years to come. Thus, additional evidence confirming investors' prior beliefs will not lead to a significant price drift because their expectations are already reflected in market prices.First year returns for firms except SG exhibit a strong financial drift. The price drift seems to persist even with longer estimation horizons. Multiple regression analyses suggest that reported higher returns for low-growth firms is not due to risk as measured by market betas or book-to-market ratios, nor is it due to the disproportionate impact caused by relatively smaller firms. As well, the one-year-ahead size-adjusted abnormal returns are significantly and negatively related to the size-adjusted abnormal returns for years 2 through 5. This result indicates that the evidence of a price drift reported in the first post-formation year might be due to a market over-reaction, a finding consistent with results reported by Lee and Swaminathan (2000). In additional analysis, return performance for all growth portfolios for the month of January is compared to the remainder of the year. No evidence indicating that returns to these portfolios are driven by extraordinary performance of low-growth firms in the month of January.For all variables (except for past sales growth and to some degree past stock returns), the financial drift in year one return for portfolios based on prior-one year of past performance data, is significantly stronger than that reported in Chan et al. (2004). Results reported in this thesis indicate that the average abnormal return differential between low and high growth firms for the five-year estimation intervals (with exception of past sales growth) is greater than 10 percentage points. The evidence contradicts that documented in Chan et al. (2004). They find no discernable evidence of price reversals over the next 36-months after ranking firms by their five-year growth rates in sales, operating income, and net income. However, results of this study are consistent with the predictions of behavioral models (e.g. Daniel et al. [I998] and Lakonishok et al. [1994]) suggesting that investors put excessive weight on patterns of a firm's past financial performance when projecting its future prospects.
8
Trimeloni, Thomas. "Accelerating Finite State Projection through General Purpose Graphics Processing." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/175.
Abstract:
The finite state projection algorithm provides modelers a new way of directly solving the chemical master equation. The algorithm utilizes the matrix exponential function, and so the algorithm’s performance suffers when it is applied to large problems. Other work has been done to reduce the size of the exponentiation through mathematical simplifications, but efficiently exponentiating a large matrix has not been explored. This work explores implementing the finite state projection algorithm on several different high-performance computing platforms as a means of efficiently calculating the matrix exponential function for large systems. This work finds that general purpose graphics processing can accelerate the finite state projection algorithm by several orders of magnitude. Specific biological models and modeling techniques are discussed as a demonstration of the algorithm implemented on a general purpose graphics processor. The results of this work show that general purpose graphics processing will be a key factor in modeling more complex biological systems.
9
Saluru, Sarat K. "Projection of TaSiOx/In0.53Ga0.47As Tri-gate transistor performance for future Low-Power Electronic Applications." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78028.
Abstract:
The aggressive scaling of silicon (Si) based complementary metal-oxide-semiconductor (CMOS) transistor over the past 50 years has resulted in an exponential increase in device density, which consequentially has increased computation power rapidly. This has pronounced the necessity to scale the device's supply voltage (VDD) in to order to maintain low-power device operation. However, the scaling of VDD can degrade drive current significantly due to the low carrier mobility of Si. To overcome the key challenges of dimensional and voltage scaling required for low-power electronic operation without degradation of device characteristics, the adoption of alternate channel materials with low bandgap with superior transport properties will play a crucial role to improve the computation ability of the standard integrated circuit (IC). The requirement of high-mobility channel materials allows the industry to harness the potential of III-V semiconductors and germanium. However, the adoption of such high mobility materials as bulk substrates remains cost-prohibitive even today. Hence, another key challenge lies in the heterogeneous integration of epitaxial high-mobility channel materials on the established cost-effective Si platform. Furthermore, dimensional scaling of the device has led to a change in architecture from the conventional planar MOSFET to be modified to a 3-D Tri-gate architecture which provides fully depleted characteristics by increasing the inversion layer area and hence, providing superior electrostatic control of the device channel to address short channel effects such as subthreshold slope (SS) and drain induced barrier lowering (DIBL). The Tri-gate configuration provides a steeper SS effectively reducing leakage current (IOFF), thereby decreasing dynamic power consumption and increasing device performance. Recently, Tantalum silicate (TaSiOx) a high-k dielectric has been shown to exhibit superior interfacial quality on multiple III-V materials. However, there is still ambiguity as to the potential of short-channel devices incorporating alternate channel (III-V) materials which is the basis of this research, to demonstrate the feasibility of future high-mobility n-channel InGaAs material integration on Si for high- speed, low-power, high performance CMOS logic applications.Master of Science
10
Gasc, Thibault. "Modèles de performance pour l'adaptation des méthodes numériques aux architectures multi-coeurs vectorielles. Application aux schémas Lagrange-Projection en hydrodynamique compressible." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLN063/document.
Abstract:
Ces travaux se concentrent sur la résolution de problèmes de mécanique des fluides compressibles. De nombreuses méthodes numériques ont depuis plusieurs décennies été développées pour traiter ce type de problèmes. Cependant, l'évolution et la complexité des architectures informatiques nous poussent à actualiser et repenser ces méthodes numériques afin d'utiliser efficacement les calculateurs massivement parallèles. Au moyen de modèles de performance, nous analysons une méthode numérique de référence de type Lagrange-Projection afin de comprendre son comportement sur les supercalculateurs récents et d'en optimiser l'implémentation pour ces architectures. Grâce au bilan de cet analyse, nous proposons une formulation alternative de la phase de projection ainsi qu'une nouvelle méthode numérique plus performante baptisée Lagrange-Flux. Les développements de cette méthode ont permis d'obtenir des résultats d'une précision comparable à la méthode de référenceThis works are dedicated to hydrodynamics. For decades, numerous numerical methods has been developed to deal with this type of problems. However, both the evolution and the complexity of computing make us rethink or redesign our numerical solver in order to use efficiently massively parallel computers. Using performance modeling, we perform an analysis of a reference Lagrange-Remap solver in order to deeply understand its behavior on current supercomputer and to optimize its implementation. Thanks to the conclusions of this analysis, we derive a new numerical solver which by design has a better performance. We call it the Lagrange-Flux solver. The accuracy obtained with this solver is similar to the reference one. The derivation of this method also leads to rethink the Remap step
11
Brennan, Michael J. "A study of factors affecting the planning, design and safety of highways and the performance of highway materials." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311586.
12
Castelli, Eleonora. "LISA Pathfinder noise performance results: disturbances in the sub-mHz frequency band and projection to LISA." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/254388.
Abstract:
The LISA Pathfinder ESA mission was concluded on July 18th, 2017, after 18 months of operations as one of the most successful ESA missions ever. It was launched on December 3rd, 2015 with the purpose of assessing the feasibility of geodesic motion of two free-falling test masses at the level required by LISA, the first space-based gravitational wave observatory programmed for launch in 2034. This was achieved by measuring the relative acceleration between free-falling test masses with a sensitivity several {orders of magnitude} better than any other present or future mission. In addition to this, LISA Pathfinder constituted an advanced technological test for the flight hardware of the LISA mission.
In this thesis work I will illustrate the detail of the experimental results obtained in the course of the mission, whose best performance was published in February 2018, and discuss their consequences for LISA. I will, in particular, describe in some detail a series of observations for which a definitive physical model is still lacking.
I will then discuss possible explanations with the aim to reduce the number of available interpretations, and in order to lay the basis for a feasible on-ground experimental campaign in view of LISA.
13
Castelli, Eleonora. "LISA Pathfinder noise performance results: disturbances in the sub-mHz frequency band and projection to LISA." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/254388.
Abstract:
The LISA Pathfinder ESA mission was concluded on July 18th, 2017, after 18 months of operations as one of the most successful ESA missions ever. It was launched on December 3rd, 2015 with the purpose of assessing the feasibility of geodesic motion of two free-falling test masses at the level required by LISA, the first space-based gravitational wave observatory programmed for launch in 2034. This was achieved by measuring the relative acceleration between free-falling test masses with a sensitivity several {orders of magnitude} better than any other present or future mission. In addition to this, LISA Pathfinder constituted an advanced technological test for the flight hardware of the LISA mission.
In this thesis work I will illustrate the detail of the experimental results obtained in the course of the mission, whose best performance was published in February 2018, and discuss their consequences for LISA. I will, in particular, describe in some detail a series of observations for which a definitive physical model is still lacking.
I will then discuss possible explanations with the aim to reduce the number of available interpretations, and in order to lay the basis for a feasible on-ground experimental campaign in view of LISA.
14
Dixon, Tennessee. "PROJECTION DESIGN FOR A CONTEMPORARY DANCE WORK BY IVÁN ANGELUS IN HUNGARY." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2536.
Abstract:
The purpose of this thesis is to document and analyze my projection design for a new dance piece, "VŰ", directed by Angelus Iván and staged at Trafó in Budapest, Hungary. Included is an account of the design process, the concept and projection development described scene by scene, execution, performance and evaluation. The paper ends with reflections on the relatively new field of image projections, and my professional goals in scenic design.
15
Duarte, Fernanda Carolina Armando 1980. "A aplicação dos efeitos visuais em tempo real na construção narrativa de espetáculos com projeção /." São Paulo, 2017. http://hdl.handle.net/11449/153969.
Abstract:
Orientador(a): Rosangella da Silva LeoteBanca: Josette Maria Alves de Souza Monzani
Banca: Marcus Vinicius Fainer Bastos
Banca: Agnaldo Valente Germano da Silva
Banca: Rita Luciana Berti Bredariolli
Resumo: Esta pesquisa investigou a aplicação dos efeitos visuais em tempo real na construção narrativa de espetáculos com projeção. Partindo de estudos para a construção de um dispositivo direcionado para a aplicação de efeitos visuais em tempo real, pretendíamos localizar como é possível fazer tal aplicação dentro de três modalidades diferentes de espetáculos, que se enquadram no escopo de trabalhos realizados pelo grupo artístico RE(C)organize, do qual fazemos parte, sendo eles: um show musical, um espetáculo performático (sendo que esses devem integrar em seus projetos a videoprojeção) e uma apresentação de vídeo mapping, que seja total ou parcialmente, realizada de forma ao vivo. A opção por essas modalidades foi feita de acordo com a afinidade profissional do grupo. Buscamos, através de um processo teórico e prático, identificar os efeitos que evidenciam um discurso narrativo, de forma simbólica e/ou metafórica, além de detectar aqueles que possuíssem a potencialidade de atender as exigências do espetáculo ao vivo, que a nosso ver são: a urgência (no sentido de que a obra precisa acontecer naquele instante único) e a evidência (no sentido de caracterizar o momento específico de forma clara) - o que é abordado de forma detalhada ao longo deste projeto
Abstract: This research investigated the application of visual effects in real time in the narrative construction of spectacles with projection. Starting from studies to construct a device directed to the application of visual effects in real time, we wanted to locate how it is possible to make such application in three different modalities of spectacles, that fall within the scope of works realized by the artistic group RE(C)organize, of which we are part, being: a musical show, a performance spectacle (being that these must integrate in their projects the videoprojection) and a presentation of video mapping, that is totally or partially, realized in a live form. The option for these modalities was made according to the professional affinity of the group. We seek, through a theoretical and practical process, to identify the effects that evidence a narrative discourse, in a symbolic and / or metaphorical way, as well as to detect those who had the potential to meet the demands of the live show, which we believe are: the urgency (in the sense that the work must happen in that unique instant) and the evidence (in the sense of characterizing the specific moment in a clear way) - which is discussed in detail throughout this project
Resumen: Esta investigación estudió la aplicación de los efectos visuales en tiempo real en la construcción narrativa de espectáculos con proyección. A partir de analisis para la construcción de un dispositivo dirigido a la aplicación de efectos visuales en tiempo real, pretendíamos localizar cómo es posible hacer la aplicación de efectos dentro de tres modalidades diferentes de espectáculos, que se encuadran en el ámbito de trabajos realizados por el grupo artístico RE(C)organize, de lo cual formamos parte, siendo ellos: un show musical, un espectáculo performático (siendo que éstos deben integrar en sus proyectos la videoproyección) y una presentación de video mapping, que sea total o parcialmente, realizada de forma en vivo. La opción por estas modalidades se hizo de acuerdo con la afinidad profesional del grupo. Buscamos, a través de un proceso teórico y práctico, identificar los efectos que evidencian un discurso narrativo, de forma simbólica y / o metafórica, además de detectar aquellos que poseían la potencialidad de atender las exigencias del espectáculo en vivo, que a nuestro ver son: la urgencia (en el sentido de que la obra necesita suceder en aquel instante único) y la evidencia (en el sentido de caracterizar el momento específico de forma clara) - lo que se aborda de forma detallada al largo de este proyecto
Doutor
16
Kastner, Robert Eugene Lee. "Structural performance of plastic pipe used for landfill leachate collection." Ohio : Ohio University, 1992. http://www.ohiolink.edu/etd/view.cgi?ohiou1172687975.
17
Turner, John James Dennis. "Interactions of forebrain cholinergic projection system damage with Benzodiazepine receptor ligand effects on cognitive performance in the rat." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399072.
18
Dudley, Kevin Shane. "Exploring humanity through theatrical design." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/3075.
Abstract:
This document will chronicle the design work of Kevin Dudley at the University of Iowa from August 2013 through the spring of 2016. The images included in this document are representative of the design work for realized productions, large and small scale, and selected explorations in course work. The work represented here includes: drafting, paint elevations, and sketches (both hand and digital). This document will stand as a record my design process and final product used to explore our humanity through theatrical design.
19
Sankaran, Sundar G. "On Ways to Improve Adaptive Filter Performance." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/30198.
Abstract:
Adaptive filtering techniques are used in a wide range of applications, including echo cancellation, adaptive equalization, adaptive noise cancellation, and adaptive beamforming. The performance of an adaptive filtering algorithm is evaluated based on its convergence rate, misadjustment, computational requirements, and numerical robustness. We attempt to improve the performance by developing new adaptation algorithms and by using "unconventional" structures for adaptive filters.
Part I of this dissertation presents a new adaptation algorithm, which we have termed the Normalized LMS algorithm with Orthogonal Correction Factors (NLMS-OCF). The NLMS-OCF algorithm updates the adaptive filter coefficients (weights) on the basis of multiple input signal vectors, while NLMS updates the weights on the basis of a single input vector. The well-known Affine Projection Algorithm (APA) is a special case of our NLMS-OCF algorithm.
We derive convergence and tracking properties of NLMS-OCF using a simple model for the input vector. Our analysis shows that the convergence rate of NLMS-OCF (and also APA) is exponential and that it improves with an increase in the number of input signal vectors used for adaptation. While we show that, in theory, the misadjustment of the APA class is independent of the number of vectors used for adaptation, simulation results show a weak dependence. For white input the mean squared error drops by 20 dB in about 5N/(M+1) iterations, where N is the number of taps in the adaptive filter and (M+1) is the number of vectors used for adaptation. The dependence of the steady-state error and of the tracking properties on the three user-selectable parameters, namely step size, number of vectors used for adaptation (M+1), and input vector delay D used for adaptation, is discussed. While the lag error depends on all of the above parameters, the fluctuation error depends only on step size. Increasing D results in a linear increase in the lag error and hence the total steady-state mean-squared error. The optimum choices for step size and M are derived. Simulation results are provided to corroborate our analytical results.
We also derive a fast version of our NLMS-OCF algorithm that has a complexity of O(NM). The fast version of the algorithm performs orthogonalization using a forward-backward prediction lattice. We demonstrate the advantages of using NLMS-OCF in a practical application, namely stereophonic acoustic echo cancellation. We find that NLMS-OCF can provide faster convergence, as well as better echo rejection, than the widely used APA.
While the first part of this dissertation attempts to improve adaptive filter performance by refining the adaptation algorithm, the second part of this work looks at improving the convergence rate by using different structures. From an abstract viewpoint, the parameterization we decide to use has no special significance, other than serving as a vehicle to arrive at a good input-output description of the system. However, from a practical viewpoint, the parameterization decides how easy it is to numerically minimize the cost function that the adaptive filter is attempting to minimize.
A balanced realization is known to minimize the parameter sensitivity as well as the condition number for Grammians. Furthermore, a balanced realization is useful in model order reduction. These properties of the balanced realization make it an attractive candidate as a structure for adaptive filtering. We propose an adaptive filtering algorithm based on balanced realizations.
The third part of this dissertation proposes a unit-norm-constrained equation-error based adaptive IIR filtering algorithm. Minimizing the equation error subject to the unit-norm constraint yields an unbiased estimate for the parameters of a system, if the measurement noise is white. The proposed algorithm uses the hyper-spherical transformation to convert this constrained optimization problem into an unconstrained optimization problem. It is shown that the hyper-spherical transformation does not introduce any new minima in the equation error surface. Hence, simple gradient-based algorithms converge to the global minimum. Simulation results indicate that the proposed algorithm provides an unbiased estimate of the system parameters.Ph. D.
20
Marková, Klotylda. "Produkční zajištění multimediálního projektu GOLEM." Master's thesis, Vysoká škola ekonomická v Praze, 2014. http://www.nusl.cz/ntk/nusl-205566.
Abstract:
The topic of this master thesis is an analysis of the multimedia project GOLEM, which has carried out two following results: theatrical one (GOLEM Štvanice) and audio-visual one (GOLEM Cube). The first part is focused on the specifics of the immersive theatre phenomenon, which was introduced in the Czech theatrical milieu for the very first time, and on the production procedure within the confines of the Prague theatre stage. The second part deals with audio-visual recording of a theatre peace, which takes place in an unconventional space, and then focuses on a technical method development for all movie-making fields with great emphasis on keeping the theatrical authenticity. It also deals with the specific system of installation within the particular space. Based on this case study of an immersive theatre performance and methodical approach to its audio-visual preservation this work develops some basic requirements that should lead to the successful results of similar future projects pointing out some possible application in other fields of practice.
21
Burczykowski, Ludovic. "Par-delà l'écran : dimension physique et espace numérique." Thesis, Paris 8, 2014. http://www.theses.fr/2014PA080020.
Abstract:
En art numérique, une pratique tend à se développer chez un nombre croissant de créateurs. Cette pratique correspond à la mise en relation d’une image numérique projetée, immatérielle, avec un support, matériel, généralement non standardisé, qui conserve par rapport à celle-ci une certaine indépendance ou autonomie. Il s’agit dans ces créations de partir d’une distinction, d’une opposition ou d’une distance entre un élément virtuel et un élément physique, qui, à partir de leur rapprochement, permet de faire émerger un sens que ce type de création devient prédisposé à porter. Devenant ainsi une façon particulière de traduire une relation au monde, cette articulation est un mode d’expression du sensible qui a sa singularité et qui dispose de spécificités.L’objectif de ce mémoire est de mettre en avant certaines pistes de réflexion pour la création, des méthodes de mise en œuvre, ainsi que des mécanismes de perception éventuels quand se joue cette rencontre de l’image, de l’objet, de la scène. Non seulement afin de comprendre la raison de l’expansion de cette pratique grandissante en ce début de 21e siècle, mais aussi d’orienter certains axes de travail envisageables pour des réalisations ou des analyses d’œuvresIn digital arts, a practice is being developed by an increasing number of creators. This practice puts in relation an immaterial projected digital image, with a material medium, generally non standardized, that ensures a certain kind of independence or autonomy towards the image. In these creations, it’s about starting from a distinction, an opposition or a distance between a virtual element and a physical element, and by moving it closer, make emerging a sense that this type of creation is becoming susceptible to carry. Becoming a specific way to express a relationship to the word, this articulation is a way to express sensible world with its own singularity and specificities. The purpose of this thesis is to outline various approaches for creation, methods of implementation, and potential mechanisms of perception when this meeting between image, object and scene is on. Not only to understand the reason of the expansion of this growing practice in the early 21st century, but also to guide some possible working areas for productions or analysis of art works
22
Merritt, Zachary. "Oscillations of the Unadorned Light Bulb." Bowling Green State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1400072401.
23
May, Elise C. "Shifting lenses: Investigating interdisciplinary approaches to the use of the moving image and digital media in live performance." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/95089/1/Elise_May_Thesis.pdf.
Abstract:
The use of digital technologies is becoming ubiquitous in contemporary dance performance practice, however rigorous questioning of the theatrical cohesion of live bodies, visual projections and digital technologies is still in its infancy. Through the lens of an embodied choreographic practice this research examines interdisciplinary perspectives on the intersecting knowledge fields of choreography, moving image, animation, installation and interactive technology. Utilising practice-led strategies, Shifting Lenses, a solo performance installation tested new and experimental relationships between movement vocabularies, digital projection, interactivity, and performance design; leading towards future development at the nexus points where digital technologies meet the body in live performance.
24
Ingram, Lucas Peter. "Visual design for the entertainment industry and beyond." Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/3110.
25
Jarel, Julia. "My hall. A stage play and My Hall: Excavating, shaping and sharing the memory of Hale School’s Memorial Hall through a site-specific, staged performance. An exegesis." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2020. https://ro.ecu.edu.au/theses/2283.
Abstract:
This thesis provides a case study which investigates the notion that a building which is historically and architecturally significant to a community holds that community’s memories within its walls. It argues that, in collaboration with the members of that community, these memories can be excavated, revealed and woven together to form a piece of site-specific theatre which can then be performed by and for those community members. It proposes that this intergenerational, creative collaboration may enhance the community members’ understanding and appreciation of the significance of the building, its place in the community and their place within it.
The site of focus for this thesis is Hale School’s Memorial Hall. In order to excavate the building’s memory, members of the Hale community were invited to visit the Hall and share the recollections revealed through physical exploration of the site. Additional memories were revealed through archival research and written and verbal exchanges with community members who could not physically visit the site. These memories were then woven, in collaboration with the community, into a site-specific theatre script designed to be staged, in Memorial Hall and its surrounds, by a cast of Old Haleians, current staff members, parents and students.
This thesis consists of an original, research-based playscript, together with exegetical writing which outlines the significance of creating this work at the current time and in the chosen place. It provides new insights into methods of excavation used to reveal memory contained within a commemorative site and contributes to a broader understanding of the role of the writer in shaping the excavated memories to form a work of site-specific theatre. This thesis illustrates the importance of community consultation in both the excavation and shaping processes.
26
Lu, Xianguo [Verfasser], and Johanna [Akademischer Betreuer] Stachel. "Exploring the performance limits of the ALICE Time Projection Chamber and Transition Radiation Detector for measuring identified hadron production at the LHC / Xianguo Lu ; Betreuer: Johanna Stachel." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177382857/34.
27
Wang, Yushan. "Solving incompressible Navier-Stokes equations on heterogeneous parallel architectures." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112047/document.
Abstract:
Dans cette thèse, nous présentons notre travail de recherche dans le domaine du calcul haute performance en mécanique des fluides. Avec la demande croissante de simulations à haute résolution, il est devenu important de développer des solveurs numériques pouvant tirer parti des architectures récentes comprenant des processeurs multi-cœurs et des accélérateurs. Nous nous proposons dans cette thèse de développer un solveur efficace pour la résolution sur architectures hétérogènes CPU/GPU des équations de Navier-Stokes (NS) relatives aux écoulements 3D de fluides incompressibles.Tout d'abord nous présentons un aperçu de la mécanique des fluides avec les équations de NS pour fluides incompressibles et nous présentons les méthodes numériques existantes. Nous décrivons ensuite le modèle mathématique, et la méthode numérique choisie qui repose sur une technique de prédiction-projection incrémentale.Nous obtenons une distribution équilibrée de la charge de calcul en utilisant une méthode de décomposition de domaines. Une parallélisation à deux niveaux combinée avec de la vectorisation SIMD est utilisée dans notre implémentation pour exploiter au mieux les capacités des machines multi-cœurs. Des expérimentations numériques sur différentes architectures parallèles montrent que notre solveur NS obtient des performances satisfaisantes et un bon passage à l'échelle.Pour améliorer encore la performance de notre solveur NS, nous intégrons le calcul sur GPU pour accélérer les tâches les plus coûteuses en temps de calcul. Le solveur qui en résulte peut être configuré et exécuté sur diverses architectures hétérogènes en spécifiant le nombre de processus MPI, de threads, et de GPUs.Nous incluons également dans ce manuscrit des résultats de simulations numériques pour des benchmarks conçus à partir de cas tests physiques réels. Les résultats obtenus par notre solveur sont comparés avec des résultats de référence. Notre solveur a vocation à être intégré dans une future bibliothèque de mécanique des fluides pour le calcul sur architectures parallèles CPU/GPUIn this PhD thesis, we present our research in the domain of high performance software for computational fluid dynamics (CFD). With the increasing demand of high-resolution simulations, there is a need of numerical solvers that can fully take advantage of current manycore accelerated parallel architectures. In this thesis we focus more specifically on developing an efficient parallel solver for 3D incompressible Navier-Stokes (NS) equations on heterogeneous CPU/GPU architectures. We first present an overview of the CFD domain along with the NS equations for incompressible fluid flows and existing numerical methods. We describe the mathematical model and the numerical method that we chose, based on an incremental prediction-projection method.A balanced distribution of the computational workload is obtained by using a domain decomposition method. A two-level parallelization combined with SIMD vectorization is used in our implementation to take advantage of the current distributed multicore machines. Numerical experiments on various parallel architectures show that this solver provides satisfying performance and good scalability.In order to further improve the performance of the NS solver, we integrate GPU computing to accelerate the most time-consuming tasks. The resulting solver can be configured for running on various heterogeneous architectures by specifying explicitly the numbers of MPI processes, threads and GPUs. This thesis manuscript also includes simulation results for two benchmarks designed from real physical cases. The computed solutions are compared with existing reference results. The code developed in this work will be the base for a future CFD library for parallel CPU/GPU computations
28
Miranda, Francisco Arnoldo Nunes. ""Representações sociais sobre a atuação do enfermeiro psiquiátrico no cotidiano"." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/83/83131/tde-17052006-105204/.
Abstract:
Captar a atuação cotidiana do profissional enfermeiro e suas representações sociais no contexto institucional psiquiátrico, foi o objetivo desta pesquisa. Neste cotidiano, o enfermeiro está envolvido com conflitos, tensões, contradições, ambivalência e polissemia. Utilizou-se um instrumento projetivo (TSC), com 16 cenas que retratam a atuação do enfermeiro no contexto institucional. Nas duas etapas de coleta dos dados, os sujeitos participantes eram 17 enfermeiros assistenciais de cinco instituições psiquiátricas do município de Ribeirão Preto e 17 enfermeiros pós-graduandos [ensino e pesquisa], doutorandos em Enfermagem Psiquiátrica, atendendo aos critérios éticos. Os achados foram submetidos à Análise de Conteúdo e à análise léxica do ALCESTE, com o suporte teórico das Representações Sociais. Os resultados mostram que o enfermeiro atua junto ao doente mental utilizando-se de artifícios mediados pelas relações técnicas, interpessoais, interacionais e institucionais. Considerando as permanências e diversidades de sua atuação, observa-se o afastamento do enfermeiro do objeto central do seu trabalho, o doente mental. Os elementos periféricos sustentam sua posição, percebida através das metáforas da atuação como controle, poder, limites e saber. Emanam desses resultados as representações sociais polêmicas, mediadas pela teoria implícita da dissonância cognitiva.This research aimed at finding out the nurses performance and its social representations in the psychiatric institutional context. In his daily activities, the nurse becomes involved in conflicts, tension, contradiction, ambivalence and polysemy. A projection tool (TSC) comprising sixteen scenes, which portray the nurses performance in the institutional context, was used. The data were gathered from a sample of seventeen social nurses from five psychiatric institutions of Ribeirão Preto and seventeen postgraduate nurses who has been attending the Doctors Degree Program in Psychiatric Nursing. The findings were submitted to content and ALCESTE lexical analyses, guided by studies of social representations. The results of this research show the way nurse treats his mental ill patients is linked to technical, interpersonal, interacting and institutional relationships. Consequently, one can notice the nurse keeps himself away from his main object, that is, the mental ill, if the permanence and diversity of his performance is considered. The peripheral elements support nurses performance and this can be perceived through such metaphors as control, power, limits and knowing. Thus, controversial social representations, mediated by implicit theory of cognitive dissonance, are present in the results of this research.
29
Dorri, Megan Mahrokh. "Study for the optimization of interfacial properties between metallic substrates and polymeric coatings by plasma-based surface modification methods to improve performance of vascular stents." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/28229.
Abstract:
Au cours de 15 dernières années, les maladies coronariennes et les accidents vasculaires cérébraux demeurent les causes principales de décès dans le monde. Selon l'Organisation Mondiale de la Santé, en 2015, ces deux maladies ont causé 15 millions des décès sur les 56,4 millions dans le monde. Des traitements chirurgicaux ont été élaborés et améliorés pour soigner ces maladies en maintenant les vaisseaux sanguins ouverts. Parmi les traitements chirurgicaux, l'angioplastie avec utilisation d’un stent est le traitement le plus populaire et le moins invasif. Les stents, qui sont des tubes métalliques en treillis, vont soutenir mécaniquement les vaisseaux sanguins après l’implantation et les maintenir ouverts pour améliorer le flux sanguin. Ceux-ci sont principalement composés d’acier inoxydable AISI316L (SS316L), d'alliage de cobalt-chrome et d'alliage de titane. Depuis plus d'un demi-siècle, lorsqu'un stent a été implanté pour la première fois, ils ont été considérablement améliorés. Cependant, la libération d'ions métalliques, potentiellement toxiques, et la détérioration des propriétés mécaniques à cause de la corrosion ainsi que la diminution de l'adhérence des revêtements, dans le cas de stents avec les revêtements en polymère, constituent encore des préoccupations majeures lors de l’utilisation des stents. Dans le cas des stents en SS316L, afin d’éviter la libération d'ions métalliques, au laboratoire de biomatériaux et de bioingénierie de l'Université Laval (LBB), lors de précédentes recherches, un revêtement fluorocarboné (CFx) a été étudié pour isoler complètement le stent de l'environnement biologique. Ce revêtement permet également le greffage ultérieur de molécules bioactives pour améliorer son intégration dans le corps. Cependant, l'interface de SS316L / CFx devait être améliorée pour augmenter l’adhésion du revêtement CFx sur le SS316L. Dans mon projet de doctorat, l’oxydation au plasma a été utilisé pour élaborer une nouvelle interface entre le substrat SS316L et le revêtement. Les propriétés de cette nouvelle interface, qui est composée d’une couche d'oxyde, ont été modifiées en faisant varier les paramètres du procédé plasma afin de préserver les propriétés de cette couche d’oxyde lorsqu’elle subit une déformation plastique de 25%, c’est-à-dire le pourcentage de déformation maximale que subira le stent lors de son implantation. Cette interface a permis de diminuer la libération des ions du substrat SS316L en réduisant son taux de corrosion plus que trois fois et d’améliorer l’adhérence adéquate du revêtement CFx sur le substrat, après déformation et après immersion dans une solution aqueuse saline. La nouvelle couche d'oxyde sur SS316L est une couche d'oxyde amorphe avec une épaisseur d'environ 6 nm qui se distincte bien de la microstructure polycristalline du substrat. L'amélioration des propriétés de l'interface a été attribuée à cette couche d'oxyde amorphe nano-épaisse, qui est résistante aux déformations plastiques. Cette couche d'oxyde peut être appliquée sur des stents métalliques nus composés de métaux passivables. En outre, elle crée une interface favorable pour les revêtements en polymère, qui sont utilisés pour les stents à relargage de principes actifs ainsi que pour améliorer l'intégration des stents dans le corps humain.Over the past 15 years, ischemic heart disease and stroke have remained the leading causes of death, worldwide. According to the World Health Organization, 15 million of the 56.4 million global deaths, in 2015, were caused only by ischemic heart disease or stroke. For the treatment of these diseases, surgical treatments have been introduced and improved to hold the blood vessels open. Among the surgical treatments, angioplasty with stenting is the most popular and the least invasive treatments. Stents, which are wire mesh tubes, prepare a mechanical support for blood vessels and hold them open to restore the blood flow. They are mostly made up of AISI316L stainless steel (SS316L), cobalt-chromium, and titanium alloys. More than half a century ago, when a stent first used, it has considerably evolved. However, release of potentially-toxic metallic ions and deterioration of mechanical properties due to corrosion, and decrease of polymeric coatings adhesion, in case of coated stents, still constitute major concerns in SS316L stents. In the case of SS316L stents, to circumvent the release of metallic ions, in the laboratory for biomaterials and bioengineering of Université Laval (LBB), a fluorocarbon (CFx) coating was previously investigated to isolate the stent completely from the biological environment. The coating also enables subsequent grafting of bioactive molecules to improve its integration in the body. The results were promising; however, the interface of SS316L/CFx needed to be modified to improve the adhesion of the CFx coating. In this Ph.D. research project, a new interface between the SS316L substrate and the CFx coating was created by plasma oxidation. The properties of this new interface, which was an oxide layer, was modified by varying the plasma-process parameters in order to preserve its properties after a 25% plastic deformation. This deformation is the maximum plastic deformation that imposes on a stent during its implantation. The new interface decreased the release of ions by decreasing the corrosion rate of the SS316L substrate by a factor of three. It was also found that the new interface produced an adequate adhesion of the CFx coating to the substrate after deformation as well as after immersion in an aqueous saline solution. The new oxide layer on SS316L was an amorphous oxide layer with an approximately 6 nm thickness, which was clearly distinguished from the polycrystalline microstructure of the substrate. The enhancement of the interface properties was ascribed to this nano-thick amorphous oxide layer, which was found to be more resistant to plastic deformation. This new oxide layer can be produced on bare-metal stents made of passivating metals. Moreover, it can create a favorable interface for coated stents, which have been used in drug-eluting stents, and also to improve stents integration in the human body.
30
Neto, Garcias de Oliveira. "An analysis of variables determining performance collection of vat in operations of entry of goods goods and the state of the period cearà 2008 2011." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9683.
Abstract:
nÃo hÃThe goods receipt and goods in the State of Cearà is subject to the controls of the Department of Finance through its various units Surveillance of borders, as the Tax Stations, which are to be submitted tax documents to be made the proper recoveries and releases of tax credits under the various tax regimes of the ICMS, which will be collected to the treasury in accordance with the types of income to which they are associated. As such revenue is to determine the revenue performance of the state in interstate operations and import entries, then a quantitative analysis was performed using the fixed effects model constants common for panel data considering the period January 2008 to December, 2011. With respect to releases of tax credits per unit of enforcement was the best response to ICMS revenue - Replacement of Input, while in relation to the payment of tax credits per unit of monitoring ICMS revenues - Other is responding with the significant result. We also conclude that the participation of units inspections working in the operations carried by road load is greater than the inspections of units located within the State of CearÃ.
A entrada de mercadorias e bens no Estado do Cearà està sujeita aos controles da Secretaria da Fazenda atravÃs de suas diversas Unidades de FiscalizaÃÃes de fronteiras, como os Postos Fiscais, onde devem ser apresentados os documentos fiscais para que sejam realizados as devidas cobranÃas e lanÃamentos dos CrÃditos TributÃrios a tÃtulo dos vÃrios regimes de tributaÃÃo do ICMS, que serÃo recolhidos ao erÃrio de acordo com os tipos de Receitas a que estÃo associados. Como tais Receitas à que determinam o desempenho da arrecadaÃÃo do Estado nas operaÃÃes de entradas interestaduais e de importaÃÃo, entÃo foi realizada uma anÃlise quantitativa, atravÃs do modelo de efeitos fixos de constantes comuns para dados em painel considerando o perÃodo de janeiro de 2008 a dezembro de 2011. Com relaÃÃo aos lanÃamentos dos crÃditos tributÃrios por unidade de fiscalizaÃÃo a melhor resposta foi para receita ICMS - SubstituiÃÃo de Entrada, enquanto que em relaÃÃo ao recolhimento dos crÃditos tributÃrios por unidade de fiscalizaÃÃo a receita ICMS - Outros à que responde com o resultado mais expressivo. Conclui-se tambÃm que a participaÃÃo das unidades de fiscalizaÃÃes que atuam nas operaÃÃes transportadas pelo modal rodoviÃrio de carga à maior que a das unidades de fiscalizaÃÃes localizadas no interior do Estado do CearÃ.
31
Asano, Naira Ery. "Tecnologia construtiva de revestimento externo de argamassa com projeção contínua." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3153/tde-24062016-151136/.
Abstract:
Os métodos construtivos de revestimento externo produzidos com argamassa vêm evoluindo ao longo do tempo, apresentando como maior mudança a substituição da aplicação manual pela projeção mecânica. Atualmente destaca-se no mercado o sistema de execução de revestimento externo com argamassa industrializada e projeção mecânica contínua com bombas helicoidais. Por se tratar de uma tecnologia ainda não muito utilizada pelas construtoras brasileiras, faltam dados confiáveis acerca de seu potencial de ganho de produtividade, redução de perdas, diminuição de contingente de mão de obra, exigências de infraestrutura para aplicação e custos envolvidos. Sem parâmetros confiáveis, adotar a tecnologia significa assumir um nível de risco elevado e isto dificulta a tomada de decisão por parte das construtoras e, por consequência, dificulta-se a evolução tecnológica. Buscando contribuir para o necessário avanço nas tecnologias de produção de revestimentos de edifícios, o objetivo desta pesquisa é estabelecer parâmetros em relação à tecnologia de produção de revestimentos de fachada que empregam argamassa com projeção contínua. Para tanto, buscou-se informações em referências como teses, dissertações, textos técnicos, normas nacionais, dentre outras, bem como, acompanhou-se e avaliou-se os resultados da implantação de um método construtivo de revestimento de argamassa com projeção mecânica contínua em uma construtora de São Paulo. Foram realizados um protótipo e um piloto que contribuíram para o desenvolvimento da tecnologia por meio de apresentação de soluções para os problemas encontrados, do levantamento de melhores práticas e de dados para o cálculo de índices de produtividade e perda. Buscou-se, portanto, a consolidação da tecnologia de projeção contínua na construtora anteriormente mencionada e no mercado em geral.The external rendering constructive methods produced with mortar have evolved over time and the greater change in it was the replacement of manual application by mechanical projection. The currently most prominent system in the market is the outer rendering execution system with industrialized mortar and continuous mechanical projection with helical pumps. Since this technology is not widely used by Brazilian construction companies, there is a lack of reliable data regarding its productivity gain potential, loss reduction, reduction of hand quota of work, infrastructure required for application and costs involved. Without reliable parameters, the decision to implement this technology is highly risky which does not encourage constructions companies to decide to apply it and, therefore, makes its technological evolution harder to be achieved. Aiming to contribute to the necessary advancement in technology for the production of rendering, this research has the objective to establish parameters to the rendering technology that uses industrialized mortar with continuous projection. With this purpose, it was used as source and reference the specialized literature such as thesis, dissertations and scientific papers, as well as both national norms. In addition, the research included the monitoring and assessment of the results from the implementation of a rendering execution method with continuous mechanical projection in a construction company in Sao Paulo. A prototype and a pilot scale were built and they contributed to the development of this technology by presenting solutions for problems identified and through the mapping of best practices and gathering data that allowed the calculation of productivity and loss rates. The goal was, thus, to consolidate the continuous projection technology in the above-mentioned construction company as well as in the market in a broader way.
32
Burczykowski, Ludovic. "Par-delà l'écran : dimension physique et espace numérique." Electronic Thesis or Diss., Paris 8, 2014. http://www.theses.fr/2014PA080020.
Abstract:
En art numérique, une pratique tend à se développer chez un nombre croissant de créateurs. Cette pratique correspond à la mise en relation d’une image numérique projetée, immatérielle, avec un support, matériel, généralement non standardisé, qui conserve par rapport à celle-ci une certaine indépendance ou autonomie. Il s’agit dans ces créations de partir d’une distinction, d’une opposition ou d’une distance entre un élément virtuel et un élément physique, qui, à partir de leur rapprochement, permet de faire émerger un sens que ce type de création devient prédisposé à porter. Devenant ainsi une façon particulière de traduire une relation au monde, cette articulation est un mode d’expression du sensible qui a sa singularité et qui dispose de spécificités.L’objectif de ce mémoire est de mettre en avant certaines pistes de réflexion pour la création, des méthodes de mise en œuvre, ainsi que des mécanismes de perception éventuels quand se joue cette rencontre de l’image, de l’objet, de la scène. Non seulement afin de comprendre la raison de l’expansion de cette pratique grandissante en ce début de 21e siècle, mais aussi d’orienter certains axes de travail envisageables pour des réalisations ou des analyses d’œuvresIn digital arts, a practice is being developed by an increasing number of creators. This practice puts in relation an immaterial projected digital image, with a material medium, generally non standardized, that ensures a certain kind of independence or autonomy towards the image. In these creations, it’s about starting from a distinction, an opposition or a distance between a virtual element and a physical element, and by moving it closer, make emerging a sense that this type of creation is becoming susceptible to carry. Becoming a specific way to express a relationship to the word, this articulation is a way to express sensible world with its own singularity and specificities. The purpose of this thesis is to outline various approaches for creation, methods of implementation, and potential mechanisms of perception when this meeting between image, object and scene is on. Not only to understand the reason of the expansion of this growing practice in the early 21st century, but also to guide some possible working areas for productions or analysis of art works
33
Ernst, Alexandra. "Spontaneous and induced cerebral plasticity during autobiographical memory and episodic future thinking performance in relapsing-remitting multiple sclerosis patients." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAJ056/document.
Abstract:
Basée sur une approche en neuropsychologie et neuroimagerie, cette étude visait à (i)caractériser le déficit du voyage mental dans le temps (VMT : mémoire autobiographique et projection future) chez des patients atteints de sclérose en plaques de forme rémittente et (ii) à améliorer leur performance. Nous avons montré que le déficit du VMT s’accompagne de changements d’activations cérébrales spontanés dans des régions clés du réseau cérébral du VMT, en comparaison de sujets sains. Par ailleurs, l’utilisation d’un programme de facilitation cognitive a permis une amélioration significative des fonctions étudiées, non attribuable à un effet « placebo » ou d’apprentissage. Le bénéfice clinique s’est traduit par une augmentation de l’activité cérébrale dans des régions cérébrales clés du réseau, mais distinctes selon la direction temporelle.Les huit expériences ont ainsi démontré que le déficit du VMT entraîne une plasticité cérébrale spontanée et que intervention cognitive est efficace et sous-tendue par des processus cérébraux détectablesBased on a double approach in clinical neuropsychology and neuroimaging, the aim of thepresent thesis was twofold: (i) to study relapsing-remitting multiple sclerosis (RR-MS)patients presenting with autobiographical memory (AM) and episodic future thinking (EFT) impairment, and (ii) to improve AM and EFT functioning in the same patients.Thus, we showed a deficit in both AM and EFT in RR-MS patients, which was expressed by spontaneous brain activity changes in key brain regions of the AM and EFT networks,relatively to healthy controls. Then, we documented that the use of a mental visual imagery (MVI)-based facilitation programme led to AM and EFT improvement, which was notattributable to nursing or learning effects. This clinical benefit was accompanied with anincreased reliance on distinct key brain regions of the core AM and EFT network.Overall, we documented the effectiveness of cognitive facilitation for AM and EFT, and the occurrence of spontaneous and induced brain plasticity changes during AM and EFT performance in RR-MS patients, which were sustained by both common and distinct cerebral mechanisms
34
Cline, Hunter. "Projections of Caesar 2012." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/honors/173.
Abstract:
Julius Caesar is a play that has been performed for hundreds of years, but in our modern adaptation we've used technology and the art of projections to give this classic play a modernistic flair and demonstrate the parallels between the political turmoil of that time and our own.
35
Gabriele, Zevallos Giselle Christin, and Armas Daniel Henry Nelson Navarro. "Control de obra del proyecto multifamiliar “Los Fresnos” a través de la gestión del valor ganado (EVM)." Bachelor's thesis, Universidad Ricardo Palma, 2015. http://cybertesis.urp.edu.pe/handle/urp/1263.
Abstract:
La presente investigación de carácter cuantitativo tiene el propósito de demostrar que el uso de la Metodología de Valor Ganado (Earned Value Management - EVM) para controlar los costos en una obra influye en la optimización de la rentabilidad de un proyecto inmobiliario; en este caso en la ejecución de la especialidad de estructuras de la obra: Proyecto Multifamiliar Los Fresnos. Para ello, se determinó el desempeño de la obra mediante los índices propuestos por el EVM, para conocer el estado del proyecto; se calculó el rendimiento y las variaciones de costo y tiempo de la ejecución de obra para estimar el rendimiento al cierre de la obra; y por último, se tomó acciones en obra para optimizar la gestión de costos. La investigación se aborda de acuerdo al tipo de estudio correlacional - transversal, ya que se midió el desempeño de costo y tiempo de la ejecución de la obra usando los índices de Rendimiento y Variación que ofrece la teoría del EVM tabulados en formatos de tablas y gráficos (validado por las ecuaciones propuestas en la Guía del PMBOK ® 5ta versión del PMI®) determinando el estado económico, la fidelidad del cronograma en el que se encontraba la obra para determinados periodos y la proyección de cómo terminaría la ejecución de la especialidad de estructuras, luego se tomaron acciones en función de los resultados obtenidos. Los resultados finales para el último periodo de aplicación del EVM en la especialidad de estructuras fue de un ahorro de hasta S/. 60 mil nuevos soles con un ligero retraso del 3% con respecto al cronograma planificado. Concluyéndose que la aplicación de la Metodología del Valor Ganado resultó efectiva para controlar las desviaciones que presentó la obra Los Fresnos, medir el progreso de la obra y actuar de forma correctiva en esta investigación.
This quantitative research aims to demonstrate that the use of the Earned Value Management (EVM) to control costs in a job influences the optimization of the performance of a real estate project; in this case the execution of the specialty structures of the job: Multifamily Project Los Fresnos. To do this, the performance of the job was determined by the rates proposed by the EVM, to find out the status of the project; calculations were taken of the performance and changes in cost and time of the execution of work to estimate the performance at the end of the job; and finally, action was taken on the job to optimize cost management. The research is discussed according to the type of correlational study - transversely, as the performance of cost and time of execution of the job was measured using indexes of performance and variation offered by the theory of EVM tabulated formats charts and graphs (validated by the equations proposed in the PMBOK ® Guide 5th Version PMI®) determining the economic status, the fidelity of schedule in which the work was at for certain periods and projecting how to end the execution of the specialty structures, then actions were taken depending on the results obtained. The final results for the latest period of EVM implementation specializing in structures were savings of up 60,000 nuevos soles with a slight delay of 3% compared to the planned schedule. Concluding that the application of Earned Value Management was effective in controlling the deviations that the Los Fresnos job presented, measuring the progress of the job, and acting in the correct manner for this investigation.
36
Rodriguez, Saul, Sami Viziri, Mikael Östling, Ana Rusu, Eduard Alarcon, and Max Lemme. "RF Performance Projections of Graphene FETs vs. Silicon MOSFETs." KTH, Integrerade komponenter och kretsar, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109266.
Abstract:
A graphene field-effect-transistor (GFET) model calibrated with extracted device parameters and a commercial 65 nm silicon MOSFET model are compared with respect to their radio frequency behavior. GFETs slightly lag behind CMOS in terms of speed despite their higher mobility. This is counterintuitive, but can be explained by the effect of a strongly nonlinear voltage-dependent gate capacitance. GFETs achieve their maximum performance only for narrow ranges of V-DS and I-DS, which must be carefully considered for circuit design. For our parameter set, GFETs require at least mu = 3000 cm(2) V-1 s(-1) to achieve the same performance as 65 nm silicon MOSFETs.QC 20130115
37
Monin, Valéry. "Elaboration et caractérisation de segments automobiles hautes performances élaborés par projection thermique." Besançon, 2000. http://www.theses.fr/2000BESA2071.
Abstract:
Les conditions de fonctionnement de plus en plus drastiques des moteurs diesels obligent les segmentiers à élaborer de nouveaux revêtements anti-usure sur les segments coup de feu. Les résultats présentés dans cette étude concernent l'élaboration et la caractérisation de revêtements sur des segments mis en oeuvre par projection thermique à plasma d'arc soufflé (APS). Ce travail s'inscrit dans le cadre d'une collaboration avec la société Perfect Circle Europe. Dans un premier temps, l'environnement segment-piston-chemise est présenté. Cet état de l'art permet d'appréhender les conditions de fonctionnement moteur ainsi que l'usure du couple segment-chemise. Il oriente le cahier des charges et définit les nouveaux revêtements à mettre en oeuvre. Le choix s'est porté sur un composite à matrice Mo avec un renfort dur de TiN. La deuxième partie est consacrée à l'optimisation de l'élaboration du revêtement d'origine (Mo-NiCrBFeSi) et à sa caractérisation physico-chimique et tribologique. Une analyse phénoménologique de l'usure montre l'importance de la cohésion interlamellaire sur les applications tribologiques et notamment l'incidence de la diffusion dissymétrique du NiCrBFeSi dans le Mo. La troisième partie concerne l'élaboration d'un revêtement à base de Mo et de Tin. Deux modes d'élaboration de poudre et deux compositions sont développés. Les résultats tribologiques et physico-chimiques des revêtements montrent l'intérêt de renforcer le composite par un liant de type NiCrBFeSi et la potentialité du TiN dans ce type d'application. La quatrième partie est consacrée à l'évolution de ces revêtements vers leur contexte industriel. Une analyse électrochimique est développée pour appréhender la stabilité chimique des revêtements vis-à-vis d'un environnement agressif. Cette analyse illustre le caractère sélectif de la corrosion de ces revêtements élaborés par projection thermiqueThe drastic working conditions of diesiel engines imply piston ring manufacturers to elaborate wear resistant coatings for top position piston ring. The results presented in this study concern the elaboration and characterization of atmospheric plasma sprayed deposits for piston ring. This study received a financial support from Perfect Circle Europe. Firstly, the piston ring-cylinder environment is presented. The consideration of the engine working conditions and the piston ring-cylinder wear mechanisms leads to the definition of a new plasma sprayed piston ring coating : a Mo matrix with a hard TiN reinforcement. The second part is dedicated to the optimization of the elaboration of the previous coating (Mo-NiCrBFeSi) and its tribological and physico-chemical characterization. Wear mechanisms analysis shows the importance of the interlamellar cohesion for tribological applications. The third part concerns the elaboration of a Mo-TiN based plasma sprayed coating from agglomerated and blended powders. Tribological results show the efficiency of the hard phases TiN associated with a NiCrBFeSi binder. Finally, an electrochemical approach is used to estimate the chemical resistance of the coatings in a corrosive environment
38
Danielski, Itai. "Energy performance of residential buildings : projecting, monitoring and evaluating." Doctoral thesis, Mittuniversitetet, Avdelningen för ekoteknik och hållbart byggande, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-27175.
Abstract:
Energy security and climate change mitigation have been discussed in Sweden since the oil crisis in the 1970s. Sweden has since then increased its share of renewable energy resources to reach the highest level among the EU member states, but is still among the countries with the highest primary energy use per capita. Not least because of that, increasing energy efficiency is important and it is part of the Swedish long term environmental objectives. Large potential for improving energy efficiency can be found in the building sector, mainly in the existing building stock but also in new constructions. Buildings hold high costs for construction, service and maintenance. Still, their energy efficiency and thermal performance are rarely validated after construction or renovation. As energy efficiency become an important aspects in building design there is a need for accurate tools for assessing the energy performance both before and after building construction. In this thesis criteria for energy efficiency in new residential buildings are studied. Several building design aspects are discussed with regards to final energy efficiency, energy supply-demand interactions and social aspects. The results of this thesis are based on energy modelling, energy measurements and one questionnaire survey. Several existing residential buildings were used as case studies. The results show that pre-occupancy calculations of specific final energy demand in residential buildings is too rough an indicator to explicitly steer towards lower final energy use in the building sector. Even post occupancy monitoring of specific final energy demand does not always provide a representative image of the energy efficiency of buildings and may result with large variation among buildings with similar thermal efficiency. A post occupancy method of assessing thermal efficiency of building fabrics using thermography is presented. The thermal efficiency of buildings can be increased by design with low shape factor. The shape factor was found to have a significant effect on the final energy demand of buildings and on the use of primary energy. In Nordic climates, atria in multi-storey apartment buildings is a design that have a potential to increase both energy efficiency (by lower shape factor) and enhance social interactions among the occupants.
39
Maillard, Odalric-Ambrym. "APPRENTISSAGE SÉQUENTIEL : Bandits, Statistique et Renforcement." Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2011. http://tel.archives-ouvertes.fr/tel-00845410.
Abstract:
Cette thèse traite des domaines suivant en Apprentissage Automatique: la théorie des Bandits, l'Apprentissage statistique et l'Apprentissage par renforcement. Son fil rouge est l'étude de plusieurs notions d'adaptation, d'un point de vue non asymptotique : à un environnement ou à un adversaire dans la partie I, à la structure d'un signal dans la partie II, à la structure de récompenses ou à un modèle des états du monde dans la partie III. Tout d'abord nous dérivons une analyse non asymptotique d'un algorithme de bandit à plusieurs bras utilisant la divergence de Kullback-Leibler. Celle-ci permet d'atteindre, dans le cas de distributions à support fini, la borne inférieure de performance asymptotique dépendante des distributions de probabilité connue pour ce problème. Puis, pour un bandit avec un adversaire possiblement adaptatif, nous introduisons des modèles dépendants de l'histoire et traduisant une possible faiblesse de l'adversaire et montrons comment en tirer parti pour concevoir des algorithmes adaptatifs à cette faiblesse. Nous contribuons au problème de la régression en montrant l'utilité des projections aléatoires, à la fois sur le plan théorique et pratique, lorsque l'espace d'hypothèses considéré est de dimension grande, voire infinie. Nous utilisons également des opérateurs d'échantillonnage aléatoires dans le cadre de la reconstruction parcimonieuse lorsque la base est loin d'être orthogonale. Enfin, nous combinons la partie I et II : pour fournir une analyse non-asymptotique d'algorithmes d'apprentissage par renforcement; puis, en amont du cadre des Processus Décisionnel de Markov, pour discuter du problème pratique du choix d'un bon modèle d'états.
40
Marinheiro, Mário Luís Simplício. "Projecto "Darma". Instalação e performance de luzes e sombras." Master's thesis, Faculdade de Ciências Sociais e Humanas, Universidade Nova de Lisboa, 2013. http://hdl.handle.net/10362/11381.
Abstract:
Trabalho
de
projecto
apresentado
para
cumprimento
dos
requisitos
necessários
à
obtenção
do
grau
Mestre
em
Ciências
da
Comunicação
na
especialização
de
Comunicação
e
ArtesO presente trabalho de projecto consiste na concepção e no desenvolvimento de um documento teórico, fundamentado e referenciado, justificando a componente prática, que é apresentada sob a forma de uma instalação artística, em contexto de site-‐ specific, apresentada em espaço público. O projecto “Darma” tem como objectivo criar uma interação de luzes e sombras com o espaço e o meio envolvente pretendendo, desta forma, que o próprio espectador possa intervir e tornar-‐se também ele um elemento constituinte da acção performativa. Para a concretização deste projecto, contribuíram não só as variadas concepções cénicas e técnicas que fui adquirindo ao longo minha experiência profissional, o gosto e o prazer de trabalhar com criações de luzes em espectáculos, assim como referências várias que fui conhecendo, como por exemplo: o modo como os chineses apresentaram os primeiros teatros de sombras projectadas, as peças de teatro de Adolphe Appia e as de Gordon Craig ou ainda as marionetas de Kantor.
41
Broth, Mathias. "Agents secrets : Le public dans la construction interactive de la représentation théâtrale." Doctoral thesis, Uppsala universitet, Romanska institutionen, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1400.
Abstract:
The present study focusses on the theatre audience, and on its’ role in the maintenance of the theatrical situation. Using video-recorded performances of relatively naturalistic, modern dramas, the study examines the behaviour of the audience in relation to the unfolding of stage events. Such behaviour is described through close inspection of the sounds the audience produces, consisting primarily of coughing, throat-clearing, and laughter. The study contributes to the growing body of research surrounding ethnomethodological conversation analysis (CA). CA methods are used to analyse not only an audience’s overt reactions to stage events, but also the actions occurring outside these relatively short-lived phenomena in the context of a theatre performance. It is demonstrated that members of the audience refrain from making « vocal noise » during the verbal interaction of actors, and some of the resources used to achieve this end are described. These include the interpretation of the emerging dialogue, of the relative positioning of actors and of the actors’ use of gesture. Members of the audience are observed making vocal noise around possible completions in the sequence of ongoing stage actions, a placing which seems to make it maximally unobtrusive. Furthermore, the audience’s laughter is described. It is argued that members of the audience negociate collective moments of laughter with each other and with the actors. In doing so, the audience displays a sensitive awareness of the other members of the audience and the performers on stage. It is finally suggested that vocal noise on one hand and laughter on the other are differently placed in relation to an emerging action. This relative placing seems to indicate their producers’ different orientations to these actions, according to which vocal noise is to be hidden and laughter to be taken as an overt reaction.
42
Ralph, Gary M. "Characterization of the radiometric performance of an IR scene projector /." Online version of thesis, 1994. http://hdl.handle.net/1850/11973.
43
Zwald, Laurent. "PERFORMANCES STATISTIQUES D'ALGORITHMES D'APPRENTISSAGE : ``KERNEL PROJECTION MACHINE'' ET ANALYSE EN COMPOSANTES PRINCIPALES A NOYAU." Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00012011.
Abstract:
La thèse se place dans le cadre de l'apprentissage statistique. Elle apportedes contributions à la communauté du machine learning en utilisant des
techniques de statistiques modernes basées sur des avancées dans l'étude
des processus empiriques. Dans une première partie, les propriétés statistiques de
l'analyse en composantes principales à noyau (KPCA) sont explorées. Le
comportement de l'erreur de reconstruction est étudié avec un point de vue
non-asymptotique et des inégalités de concentration des valeurs propres de la matrice de
Gram sont données. Tous ces résultats impliquent des vitesses de
convergence rapides. Des propriétés
non-asymptotiques concernant les espaces propres de la KPCA eux-mêmes sont également
proposées. Dans une deuxième partie, un nouvel
algorithme de classification a été
conçu : la Kernel Projection Machine (KPM).
Tout en s'inspirant des Support Vector Machines (SVM), il met en lumière que la sélection d'un espace vectoriel par une méthode de
réduction de la dimension telle que la KPCA régularise
convenablement. Le choix de l'espace vectoriel utilisé par la KPM est guidé par des études statistiques de sélection de modéle par minimisation pénalisée de la perte empirique. Ce
principe de régularisation est étroitement relié à la projection fini-dimensionnelle étudiée dans les travaux statistiques de
Birgé et Massart. Les performances de la KPM et de la SVM sont ensuite comparées sur différents jeux de données. Chaque thème abordé dans cette thèse soulève de nouvelles questions d'ordre théorique et pratique.
44
Zwald, Laurent. "Performances statistiques d'algorithmes d'apprentissage : "Kernel projection machine" et analyse en composantes principales à noyau." Paris 11, 2005. https://tel.archives-ouvertes.fr/tel-00012011.
Abstract:
La thèse se place dans le cadre de l'apprentissage statistique. Elle apporte des contributions à la communauté du machine learning en utilisant des techniques de statistiques modernes basées sur des avancées dans l'étude des processus empiriques. Dans une première partie, les propriétés statistiques de l'analyse en composantes principales a noyau (KPCA) sont explorées. Le comportement de l'erreur de reconstruction est étudie avec un point de vue non-asymptotique et des inégalités de concentration des valeurs propres de la matrice de Gram sont données. Tous ces résultats impliquent des vitesses de convergence rapides. Des propriétés non-asymptotiques concernant les espaces propres de la KPCA eux-mêmes sont également proposées. Dans une deuxième partie, un nouvel algorithme de classification a été conçu : la Kernel Projection Machine (KPM). Tout en s'inspirant des Support Vector Machines (SVM), il met en lumière que la sélection d'un espace vectoriel par une méthode de réduction de la dimension telle que la KPCA régularise convenablement. Le choix de l'espace vectoriel utilise par la KPM est guide par des études statistiques de sélection de modèle par minimisation pénalisée de la perte empirique. Ce principe de régularisation est étroitement relie a la projection fini-dimensionnelle étudiée dans les travaux statistiques de Birge et Massart. Les performances de la KPM et de la SVM sont ensuite comparées sur différents jeux de données. Chaque thème aborde dans cette thèse soulevé de nouvelles questions d'ordre théorique et pratiqueThis thesis takes place within the framework of statistical learning. It brings contributions to the machine learning community using modern statistical techniques based on progress in the study of empirical processes. The first part investigates the statistical properties of Kernel Principal Component Analysis (KPCA). The behavior of the reconstruction error is studied with a non-asymptotique point of view and concentration inequalities of the eigenvalues of the kernel matrix are provided. All these results correspond to fast convergence rates. Non-asymptotic results concerning the eigenspaces of KPCA themselves are also provided. A new algorithm of classification has been designed in the second part: the Kernel Projection Machine (KPM). It is inspired by the Support Vector Machines (SVM). Besides, it highlights that the selection of a vector space by a dimensionality reduction method such as KPCA regularizes suitably. The choice of the vector space involved in the KPM is guided by statistical studies of model selection using the penalized minimization of the empirical loss. This regularization procedure is intimately connected with the finite dimensional projections studied in the statistical work of Birge and Massart. The performances of KPM and SVM are then compared on some data sets. Each topic tackled in this thesis raises new questions
45
George, Sean (Sean Peter Merrill) 1973. "The effect of configurational asymmetries on projectile aerodynamics, stability, and performance." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/28193.
46
Winson, Ninh. "Performance Comparison of Projective Elliptic-curve Point Multiplication in 64-bit x86 Runtime Environment." NSUWorks, 2014. http://nsuworks.nova.edu/gscis_etd/11.
Abstract:
For over two decades, mathematicians and cryptologists have evaluated and presented the theoretical performance of Elliptic-curve scalar point-multiplication in projective geometry. Because computation in projective domain is composed of a wide array of formulations and computing optimizations, there is not a comprehensive performance comparison of point-multiplication using projective transformation available to verify its realistic efficiency in 64-bit x86 computing platforms. Today, research on explicit mathematical formulations in projective domain continues to excel by seeking higher computational efficiency and ease of realization. An explicit performance evaluation will help implementers choose better implementation methods and improve Elliptic-curve scalar point-multiplication. This paper was founded on the practical solution that obtaining realistic performance figures should be based on more precise computational cost metrics and specific computing platforms. As part of that solution, an empirical performance benchmark comparison between two approaches implementing projective Elliptic-curve scalar point-multiplication will be presented to provide the selection of, and subsequently ways to improve scalar point-multiplication technology executing in a 64-bit x86 runtime environment.
47
Tagorti, Manel. "Sur les abstractions et les projections des processus décisionnels de Markov de grande taille." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0005/document.
Abstract:
Les processus décisionnels de Markov (MDP) sont un formalisme mathématique des domaines de l'intelligence artificielle telle que la planification, l'apprentissage automatique, l'apprentissage par renforcement... Résoudre un MDP permet d'identifier la stratégie (politique) optimale d'un agent en interaction avec un environnement stochastique. Lorsque la taille de ce système est très grande il devient difficile de résoudre ces processus par les moyens classiques. Cette thèse porte sur la résolution des MDP de grande taille. Elle étudie certaines méthodes de résolutions: comme les abstractions et les méthodes dites de projection. Elle montre les limites de certaines abstractions et identifie certaines structures "les bisimulations" qui peuvent s'avérer intéressantes pour une résolution approchée du problème. Cette thèse s'est également intéressée à une méthode de projection l'algorithme Least square temporal difference LSTD(λ). Une estimation de la borne sur la vitesse de convergence de cet algorithme a été établie avec une mise en valeur du rôle joué par le paramètre [lambda]. Cette analyse a été étendue pour déduire une borne de performance pour l'algorithme Least square non stationary policy iteration LS(λ)NSPI en estimant la borne d'erreur entre la valeur calculée à une itération fixée et la valeur sous la politique optimale qu'on cherche à identifierMarkov Decision Processes (MDP) are a mathematical formalism of many domains of artifical intelligence such as planning, machine learning, reinforcement learning... Solving an MDP means finding the optimal strategy or policy of an agent interacting in a stochastic environment. When the size of this system becomes very large it becomes hard to solve this problem with classical methods. This thesis deals with the resolution of MDPs with large state space. It studies some resolution methods such as: abstractions and the projection methods. It shows the limits of some approachs and identifies some structures that may be interesting for the MDP resolution. This thesis focuses also on projection methods, the Least square temporal difference algorithm LSTD(λ). An estimate of the rate of the convergence of this algorithm has been derived with an emphasis on the role played by the parameter [lambda]. This analysis has then been generalized to the case of Least square non stationary policy iteration LS(λ)NSPI . We compute a performance bound for LS([lambda])NSPI by bounding the error between the value computed given a fixed iteration and the value computed under the optimal policy, that we aim to determine
48
Korostelev, Michael. "Performance Evaluation for Full 3D Projector Calibration Methods in Spatial Augmented Reality." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/213116.
Abstract:
Electrical and Computer EngineeringM.S.E.E.
Spatial Augment Reality (SAR) has presented itself to be an interesting tool for not only interesting ways to visualize information but to develop creative works in performance arts. The main challenge is to determine accurate geometry of a projection space and determine an efficient and effective way to project digital media and information to create an augmented space. In our previous implementation of SAR, we developed a projector-camera calibration approach using infrared markers. However, the projection suffers severe distortion due to the lack of depth information in the projection space. For this research, we propose to develop a RGBD sensor - projector system to replace our current projector-camera SAR system. Proper calibration between the camera or sensor and projector links vision to projection, answering the question of which point in camera space maps to what point in the space of projection. Calibration will resolve the problem of capturing the geometry of the space and allow us to accurately augment the surfaces of volumetric objects and features. In this work three calibration methods are examined for performance and accuracy. Two of these methods are existing adaptations of 2D camera - projector calibrations (calibration using arbitrary planes and ray-plane intersection) with our third proposed novel technique which utilizes point cloud information from the RGBD sensor directly. Through analysis and evaluation using re-projection error, results are presented, identifying the proposed method as practical and robust.
Temple University--Theses
49
Sharir, Yacov. "Beyond the electronic connection : the technologically manufactured cyber-human and its physical human counterpart in performance : a theory related to convergence identities." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/1498.
Abstract:
This thesis is an investigation of the complex processes and relationships between the physical human performer and the technologically manufactured cyber-human counterpart. I acted as both researcher and the physical human performer, deeply engaged in the moment-to-moment creation of events unfolding within a shared virtual reality environment. As the primary instigator and activator of the cyber-human partner, I maintained a balance between the live and technological performance elements, prioritizing the production of content and meaning. By way of using practice as research, this thesis argues that in considering interactions between cyber-human and human performers, it is crucial to move beyond discussions of technology when considering interactions between cyber-humans and human performers to an analysis of emotional content, the powers of poetic imagery, the trust that is developed through sensory perception and the evocation of complex relationships. A theoretical model is constructed to describe the relationship between a cyber-human and a human performer in the five works created specifically for this thesis, which is not substantially different from that between human performers. Technological exploration allows for the observation and analysis of various relationships, furthering an expanded understanding of ‘movement as content’ beyond the electronic connection. Each of the works created for this research used new and innovative technologies, including virtual reality, multiple interactive systems, six generations of wearable computers, motion capture technology, high-end digital lighting projectors, various projection screens, smart electronically charged fabrics, multiple sensory sensitive devices and intelligent sensory charged alternative performance spaces. They were most often collaboratively created in order to augment all aspects of the performance and create the sense of community found in digital live dance performances/events. These works are identified as one continuous line of energy and discovery, each representing a slight variation on the premise that a working, caring, visceral and poetic content occurs beyond the technological tools. Consequently, a shift in the physical human’s psyche overwhelms the act of performance. Scholarship and reflection on the works have been integral to my creative process throughout. The goals of this thesis, the works created and the resulting methodologies are to investigate performance to heighten the multiple ways we experience and interact with the world. This maximizes connection and results in a highly interactive, improvisational, dynamic, non-linear, immediate, accessible, agential, reciprocal, emotional, visceral and transformative experience without boundaries between the virtual and physical for physical humans, cyborgs and cyber-humans alike.
50
Bôto, Ana Margarida Carapinha. "Trabalho projecto: fundos de investimento de carbono: o caso do Luso Carbon Fund." Master's thesis, Instituto Superior de Economia e Gestão, 2010. http://hdl.handle.net/10400.5/1835.
Abstract:
Mestrado em Contabilidade, Fiscalidade e Finanças EmpresariaisCom a expectativa de ser possível gerar lucro através dos mecanismos resultantes do Protocolo de Quioto, o Clean Development Mechanism, o Joint Implementation e o Assigned Amount Units, surgiram os fundos de investimento em carbono que têm por objectivo juntar capital para transaccionar créditos de carbono. Nos últimos anos assistiu-se a um desenvolvimento destes fundos, o que reflecte por um lado a preocupação ambiental, e por outro lado o interesse na possibilidade de obter lucro através do investimento em actividade de carácter ambiental. Em 2006 surge o primeiro e único fundo de carbono de origem portuguesa, o Luso Carbon Fund (LCF), que tem por objectivo a compra e venda de licenças de emissão de carbono e o desenvolvimento de projectos que visam a redução das emissões de carbono. Dado o crescimento destes fundos no mercado, questiona-se a performance dos fundos de investimento em carbono bem como a sua utilidade. Para responder a estas questões é utilizada uma abordagem de benchmarking para analisar o LCF. Em primeiro lugar é avaliada a performance do LCF face à performance de outros fundos de investimento portugueses, desta avaliação com base em amostras das cotações das unidades de participação conclui-se que o LCF parece ser aquele que parece apresentar a melhor performance. De seguida é avaliada a performance financeira do LCF face ao investimento em créditos de carbono disponíveis no mercado, de onde se conclui, com base nos dados das amostras que parece ser preferível o investimento no mercado de carbono através destes fundos. Conclui-se então deste trabalho que do ponto de vista dos investidores os fundos de investimento de carbono podem ser uma boa alternativa aos fundos de investimentos convencionais, e que para aqueles interessados em obter lucro no mercado de carbono, estes fundos parecem ser com base na análise a melhor opção face à compra e venda dos créditos de carbono.
Expecting profit from the mechanisms created by the Kyoto Protocol, Assigned Amount Units, Joint Implementation and Clean Development Mechanism, appeared carbon investment funds that aim to obtain capital by trading carbon credits. Over the last years the number of carbon investment funds grew up quickly evidencing simultaneously the environmental concern and the interest in making profits through the investment in environmental actions. In 2006, appeared the first carbon investment fund managed by a Portuguese company, the Luso Carbon Fund (LCF) based on carbon credits trading and in investing in projects that is expected to generate carbon credits. Because of the carbon investment funds growth, there is an interest on study the performance of these funds. Moreover, there is a question about the utility of these funds. To answer these questions it is used a benchmarking approach to analyze the LCF. In first place the performance of LCF is compared with the performance of other Portuguese investment funds resulting that LCF is the fund with the best performance. The financial performance of the LCF is then compared with the performance of the carbon credits available in the market, from this comparison it can be seen that the investment in the carbon market behind investment carbon funds is preferable than accessing directly the carbon market. We conclude from this work that for usual investors, investment carbon fund can be a good alternative to the conventional investment funds. For those that are interested in profit from carbon market investment it seems that investing through investment funds is the best option.