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Patterson, Rudolph Albert. "Using hot air balloons to boost middle school students' understanding of the mole concept." CSUSB ScholarWorks, 1997. https://scholarworks.lib.csusb.edu/etd-project/1376.
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Chabas-Bues, Christiane. "Histoire du concept de Mole (1869-1969) : à la croisée des disciplines physique et chimie." Paris 10, 1999. http://www.theses.fr/1999PA100041.
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En 1969, une septieme unite de base est ajoutee au systeme international d'unites de mesure: la mole est l'unite de quantite de matiere. Cette grandeur, introduite sans bruit, n'est pas encore passee dans les habitudes scientifiques. D'ou procede la creation d'une nouvelle grandeur? a quelles exigences repond la definition d'une unite de mesure pour les chimistes? on montre que l'invention de cette notion se situe a la croisee de trois histoires independantes. Elle implique d'abord la notion de poids atomique issue de la chimie du xixe siecle. Ce nombre proportionnel, relatif a une reference conventionnelle, est une carateristique strictement individuelle qui definit l'identite de chaque element. La molecule-gramme ("mole" en abrege), fut introduite dans la chimie physique a la fin du xixe siecle. Elle associe le poids moleculaire a une unite de masse. Elle fonctionne comme une "jauge" chimique et permet d'exprimer des lois generales en nombre de moles. Ainsi pas plus que les chimistes, les physico-chimistes ne definissaient la dimension de la grandeur qu'ils mesuraient. Cependant, grace a la theorie cinetique des gaz, les physiciens referent la molecule-gramme au nombre de molecules contenues dans un volume donne, bref au nombre d'avogadro. La definition de la mole resulte donc avant tout d'une volonte d'harmonisation entre les mesures des physiciens et des chimistes qui s'est concretisee par l'adoption d'une echelle commune de poids atomiques fondee sur l'isotope 12 du carbone. Cette premiere tentative de standardisation ne fut cependant que le prelude a une reflexion metrologique approfondie sur la nature et la dimension de la grandeur mesuree en chimie, menee conjointement par les unions internationales de chimie et de physique. Chimie, physique, metrologie, ces trois disciplines concourent a la definition actuelle de la mole. D'ou la complexite de cette notion de base qui tresse trois logiques distinctes. D'ou l'originalite de son histoire car l'acte fondateurde l'unite de mesure des chimistes ne constitue pas une solution triomphale qui perimerait les concepts anterieurs.
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Unlu, Yalcin. "The Effect Of Explicit Method Of Problem Solving Accompanied With Analogies On Understanding Of Mole Concept." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607488/index.pdf.
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ABSTRACT
THE EFFECT OF EXPLICIT METHOD OF PROBLEM SOLVING ACCOMPANIED WITH ANALOGIES
ON UNDERSTANDING OF
MOLE CONCEPT
Ü<br>NLÜ<br>, Yalç<br>in
M.S., Department of Secondary Science and Mathematics Education
Supervisor: Prof. Dr. Ö<br>mer GEBAN
September 2006, 56 pages
The aim of this thesis was to analyse the effectiveness of explicit method of problem solving accompanied with analogy instruction over traditionally designed chemistry introduction on understanding of mole concept and attitude toward chemistry as a school subject.
Participants for this research consisted of 53 students at ninth grade level from two classes taught by the same teacher in Atatü<br>rk Anadolu Lycee. The study was carried out during the second semester in the 2004-2005 school year.
During the treatment, students in the experimental group were instructed with explicit method of problem solving accompanied with analogies. Students in
the control group studied only with traditionally designed chemistry instruction. Both groups were administered Mole Concept Achievement Test and Attitude Scale toward Chemistry as a School Subject as pre-tests and post-tests.
To analyse the data, statistical techniques paired samples t-test and independent samples t-test were used in this study. Statistical analyses were carried out by using the SPSS 10.0.
Results of the study showed that explicit method of problem solving accompanied with analogy instruction caused a significantly better acquisition of scientific conception related to mole concept but produced no significant positive attitudes toward chemistry as a school subject than the traditionally designed chemistry instruction.
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Colagrande, Elaine Angelina. "Desenvolvimento de um jogo didático virtual para o aprendizado do conceito de mol." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/81/81132/tde-31052012-114529/.
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Um fato verificado pelos professores ligados à área de educação química é que o conceito de mol, de fundamental importância para o ensino de química, constitui um obstáculo de aprendizagem, visto que os alunos de ensino médio sentem considerável dificuldade em seu aprendizado, pois o referido conceito requer conhecimentos básicos nem sempre bem definidos na estrutura cognitiva dos estudantes. Para atenuar este problema, foi desenvolvido um software, na forma de jogo didático, baseado nas dificuldades relatadas em entrevistas com professores e alunos e fundamentado na teoria da atividade de Leontiev. O objetivo deste trabalho foi investigar se este recurso auxilia como mediador na aprendizagem do conceito de mol. O jogo é composto de três fases, das quais duas exploram conceitos matemáticos básicos como reconhecimento de fórmulas, cálculos envolvendo potências e relações proporcionais e a terceira fase aborda o conceito de mol propriamente dito. Estudantes do ensino médio utilizaram o software e os dados coletados foram analisados levando-se em conta os testes escritos respondidos pelos alunos e suas ações durante o jogo. Os resultados obtidos, as observações realizadas durante a aplicação do jogo e os comentários dos participantes indicam claramente que o software foi eficaz e motivador, tendo em seu corpo o aspecto lúdico e o educativo, e que contribuiu na aprendizagem do conceito em questão.<br>A fact verified by teachers involved with Chemistry education is that the concept of mol, extremely important to the teaching of chemistry, makes up an obstacle to the learning process since the referred concept requires some basic knowledge which is not always so well defined in the students\' cognitive structure. In order to attenuate this problem, a software was developed based on the difficulties arisen in the interviews with teachers and students and supported by Leontiev\'s theory of activity. The objective of this paper is to investigate whether this resource could help as a mediator in the learning of mol concept. The game comprises three stages, two of which exploit basic math concepts such as recognizing formulas, calculations involving powers and proportional relations whereas the third one really approaches the concept of mol. Secondary school students made use of the software and the data was collected and analyzed from both the students\' written answers to the tests as well as their actions during the game. The results obtained, the observations made during the game and the comments of the participants clearly point out that the software is effective and motivational, showing also its educative and ludic aspects, which contributed to the learning of the said concept.
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Yang, Yuchen. "Transformer Shielding Technique for Common Mode Noise Reduction in Switch Mode Power Supplies." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49263.
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Switch mode power supplies are widely used in different applications. High efficiency and high power density are two driving forces for power supply systems. However, high dv/dt and di/dt in switch mode power supplies will cause severe EMI noise issue. In a typical front-end converter, the EMI filter usually occupies 1/3 to 1/4 volume of total converter. Hence, reducing the EMI noise of power converter can help reduce the volume of EMI filter and improving the total power density of the converter.
For off-line switch mode power supplies, DM noise is dominated by PFC converter. CM noise is a more complicated issue. It is contributed by both PFC converter and DC/DC converter. While many researches have focused on reducing CM noise for PFC converter, the CM noise of DC/DC converter still remains a challenge. The main objective of this thesis is provide a solution to have best CM noise reduction for DC/DC converters. The shielding concept and balance concept are combined to propose a novel balance double shielding technique. This method can have an effective CM noise reduction in the circuit level. In addition it is easy to design and implement in the real production. The balance condition is easily controlled and guarantees effective CM noise reduction in mass production. Then, a novel one-layer shielding method for PCB winding transformer is provided. This shielding technique can block CM noise from primary side and also cancel the CM noise from secondary side. In addition, shielding does not increase the loss of converter too much. Furthermore, this shielding technique can be applied to matrix transformer structure. For matrix transformer LLC converter, the inter-winding capacitor is very large and will cause severe CM noise problem. By adding shielding layer, CM noise has been greatly reduced. In addition, by modifying the secondary winding, the loss on shielding layer is minimized and experiments show that the total efficiency of converter has almost no impact.
Furthermore, although this thesis uses flyback and LLC resonant converter as example to demonstrate the concept, the novel shielding technique can also be applied to other topologies that have similar transformer structure.<br>Master of Science
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Ethier, Jonathan L. T. "Antenna Shape Synthesis Using Characteristic Mode Concepts." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23464.
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Characteristic modes (CMs) provide deep insight into the electromagnetic behaviour of any arbitrarily shaped conducting structure because the CMs are unique to the geometry of the object. We exploit this very fact by predicting a perhaps surprising number of important antenna metrics such as resonance frequency, radiation efficiency and antenna Q (bandwidth) without needing to specify a feeding location. In doing so, it is possible to define a collection of objective functions that can be used in an optimizer to shape-synthesize antennas without needing to define a feed location a priori. We denote this novel form of optimization “feedless” or “excitation-free” antenna shape synthesis. Fundamentally, we are allowing the electromagnetics to dictate how the antenna synthesis should proceed and are in no way imposing the physical constraints enforced by fixed feeding structures. This optimization technique is broadly applied to three major areas of antenna research: electrically small antennas, multi-band antennas and reflectarrays. Thus, the scope of applicability ranges from small antennas, to intermediate sizes and concludes with electrically large antenna designs, which is a testament to the broad applicability of characteristic mode theory. Another advantage of feedless electromagnetic shape synthesis is the ability to synthesize antennas whose desirable properties approach the fundamental limits imposed by electromagnetics. As an additional benefit, the feedless optimization technique is shown to have greater computational efficiency than traditional antenna optimization techniques.
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Ethier, Jonathan. "MIMO antenna design using characteristic mode concepts." Thesis, University of Ottawa (Canada), 2008. http://hdl.handle.net/10393/27683.
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In this thesis we show how characteristic mode (CM) theory can be used to in the design of the antennas with the low envelope correlation coefficients preferred for MIMO antennas. This is due to the fact that the radiated fields of CMs are orthogonal over the radiation sphere. We show how a handheld device structure can be excited at various points (which form the multi-antenna ports) to ensure that each port excites a set of CMs such that the mode indices in each set are different for each antenna. It is this important result which causes the natural orthogonality properties of the CMs to be transferred to the overall radiation patterns of the multiple antennas. The CM analysis we have performed includes the effects of structure losses; it appears to be the first time that the computation of such modes have been reported. A logical and satisfying methodology for MIMO antenna design is the result. The methodology is extended to include arbitrary MIMO scattering environments using polarization sensitive generalized characteristic modes, which is the first of its kind from both the theory and methodology perspective. This design approach for MIMO antennas is not restricted to handheld devices, and can be used in a variety of applications. Lastly we discuss the various port mode theories that yield far-field orthogonality for perfect scattering environments, the application of which has already been discussed in the literature. We show succinctly that physical port symmetry yields frequency insensitive modes, but very minor symmetry breaking yields very narrow low envelope correlation bandwidth, something that is not discussed in the literature, but discussed in detail in this thesis.
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Bruno, Antonio 1972. "Tearing-mode transport model in the reversed field pinch concept." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/30007.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2002.<br>Includes bibliographical references (leaves 185-188).<br>In this thesis, a self-consistent model for analyzing the transport performance of a Reversed Field Pinch (RFP)-type of thermonuclear fusion reactor has been developed. The study has been focused on determining equilibrium configurations which describe a plasma evolution dominated by particular instabilities originated by plasma electrical resistivity (tearing-, or resistive interchange, modes). The ultimate goal is to provide a model of transport scaling in an RFP which can evaluate the global parameters describing the plasma confinement performance. Starting from a magnetic field configuration essentially given by Taylor's relaxation model, the self-consistent pressure profile is determined by assuming that the ohmic heating source raises the plasma pressure until the profile is locally marginally stable to tearing modes. A critical point here is the long held belief that an RFP, because of its bad curvature, would always be unstable to tearing or resistive interchange modes; that is, no marginally stable state exists. This belief turns out to be untrue. The basis for this statement is a careful ordering of the resistive layer dynamics, showing that thermal conductivity dominates over convection and compressibility. Thus, the use of the adiabatic equation of state in earlier work is not accurate for an RFP.<br>(cont.) As a result, tearing and interchange modes can indeed be stabilized in an RFP. In this model, a proper, selfconsistent definition of tearing-mode marginality has been used as a prescription for building the pressure profile. The actual numerical determination of the marginally stable profiles can be solved by using state-of-the-art personal computers. It is worth emphasizing that there are no free parameters in the model. Point checks indicate reasonable agreement with typical experimental data. Parametric numerical studies are also shown, spanning the operational space of RFP experiments, and finally providing the tearing mode transport scaling relations for the global confinement parameters. Comparisons with experiments as well as other transport models are shown.<br>by Antonio Bruno.<br>Ph.D.
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Gustafsson, Mattias, and Oliver Odd. "Virtual Reality Data Visualization : Concepts, technologies and more." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-37222.
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Data Visualization (DV) can be seen as an important tool for communication and data analysis. Especially when huge amounts of data are involved, visual representation of data can facilitate observation of trends and patterns as well as understanding. Currently, two dimensional displays are mainly used for Data Visualization, both in two and three dimensions (2D and 3D). However, two dimensional displays are limited in terms of 3D visualization because they do not allow for true sense of depth and do not cover the observer’s full Field Of View (FOV). An alternative approach is to use Virtual Reality (VR), which provides an immersive and interactive 3D environment. VR has been mainly used for gaming and simulated training. However, other areas are now emerging because VR technologies became relatively affordable. For example, one possibility is to explore VR for DV and this was the main goal of this project. To accomplish that, a literature study was performed to identify terminologies and definitions, hardware and software technologies, techniques and examples in the fields of DV and VR. In addition, in order to exemplify DV through VR, a prototype system was implemented using Unity 3D, a leading engine for VR. To visualize the developed VR environment, a HTC Vive Head Mounted Display (HMD) was used. The developed prototype system can display data from a local dataset in a scatter plot with three axis in VR. In the virtual environment created by the system, the user can select the attributes in the dataset to be displayed by the 3D scatter plot. Once the data is plotted, the user can use the handheld joystick to move, rotate, tilt and scale the scatter plot. Achieved results indicate immersion and interaction as the main perceived benefits of DV using VR.<br>Datavisualisering (DV) kan ses som ett viktigt verktyg för kommunikation och dataanalys, speciellt när stora mängder data behandlas. Visuell representation kan främja observationen av trender och mönster samt förståelsen av datan. För närvarande används tvådimensionella displayer huvudsakligen för datavisualisering, både i två och tre dimensioner (2D och 3D). Emellertid är tvådimensionella displayer begränsade i 3D-visualisering eftersom de inte möjliggör äkta djupseende, och täcker inte observatörens fulla synfält (Field Of View (FOV)). Ett alternativ tillvägagångssätt är att använda Virtual Reality (VR), vilket tillhandahåller en omslutande och interaktiv 3D-miljö. VR har huvudsakligen används för spel och simulerad träning. Däremot börjar nya användningsområden uppstå då VR teknologin har blivit mer prisvärd. Ett användningsområde är VR för DV, vilket var det huvudsakliga syftet för det här arbetet. För att uppnå syftet utfördes en litteraturstudie för att identifiera teknologier och definitioner, hårdvaru- och mjukvaruteknologier, tekniker och exempel inom området av DV och VR. Dessutom, för att exemplifiera DV genom VR, utvecklades ett prototypsystem. Vilket implementerades genom Unity 3D, en av de ledande spelmotorerna. För att visualisera den utvecklade VR-miljön användes ett HTC Vive Head Mounted Display (HMD). Den utvecklade prototypen kan visualisera data från ett lokalt dataset genom ett spridningsdiagram med 3 axlar, i VR. I den virtuella miljön som skapas av systemet tillåts användaren att välja attribut från datasetet för att sedan visualisera dessa genom det tredimensionella spridningsdiagrammet. När datan väl är visualiserad, kan användaren använda de handhållna kontrollerna för att flytta, rotera, luta och skala grafen. Uppnådda resultat indikerar på omslutning och interaktion som de huvudsakliga fördelarna av DV genom VR.
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Boucher, Pauline. "Spatial mode multiplexing : from fundamental concepts to applications." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS483.
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Cette thèse est dédiée à l’étude du multiplexage de mode spatiaux, depuis ses fondements conceptuels jusqu’à ses applications techniques. Le convertisseur optique multi-plan (MPLC ou multiplane light converter) développé par CAILabs est au centre de notre étude. Le travail mené durant cette thèse s’est organisé autour de deux axes de travail. Nous avons d’une part étudié comment la manipulation de modes transverses du champ électromagnétique permet la manipulation ou la mesure de paramètres. Nous démontrons que la limite théorique de sensibilité sur la mesure de petits déplacements d’un faisceau lumineux est atteinte en effectuant une mesure d’intensité sur la base des modes de Hermite-Gauss. Cette démonstration vaut également pour la mesure de distance entre deux sources de lumière incohérentes entre elles. Nous avons confirmé expérimentalement la validité de ce résultat en utilisant un système MPLC adéquat. Un système MPLC peut également être construit afin de transférer le contrôle d’un degré de liberté spatial sur un autre. Nous présentons une expérience dans laquelle nous montrons que l’utilisation d’un tel système permet de contrôler la position du point focal d’un faisceau à l’aide du déplacement ou de l’inclinaison transverse du faisceau d’entrée. D’autre part, nous avons effectué une étude numérique et théorique des propriétés de transport du système MPLC à l’aide d’outils issus de la théorie des matrices aléatoires. Notre but est d’identifier les mécanismes physiques qui rentrent en jeu dans cette technique de mise en forme de la lumière<br>This thesis is dedicated to spatial mode multiplexing, from its fundamental concepts to its applications. The work is associated with the multi-plane light converter (MPLC) technology developed by CAILabs. This study is divided into two main parts. First, we investigate the use of independent spatial mode shaping to measure or modify spatial parameters of the electromagnetic field. We make the theoretical demonstration that the best sensitivity for the measurement of small displacements of a beam – or of the distance between two incoherent beams – is reached when an intensity measurement is made on the Hermite-Gaussian mode basis. By building the adequate MPLC system, we make the experimental validation of this result. We also make the demonstration that a MPLC system can be designed and used to transfer the control of one spatial parameter of a beam onto another. We built an experimental setup which allows to control the position of the focal point of a beam using transverse displacement and tilt. The second project we conducted was a theoretical and numerical study of the statistical transport properties of the MPLC using tools from random matrix theory. We aim at identifying the underlying physical processes which make up for the efficiency of this transformation technique
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James, Michael Mark. "Fundamental Studies of the Herschel-Quinke Tube Concept with Mode Measurements." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/35862.
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A fundamental study of the Herschel-Quincke (HQ) tube concept for the reduction of noise in circular ducts is presented here. Recent testing of the Herschel-Quincke tube concept on the Pratt-Whitney JT15D and AlliedSignal TFE731-60 engines showed the potential for the practical application of this approach. A model of the HQ-system has been developed to aid in the design of the system tested. The model has revealed new noise control mechanisms associated to the implementation of multiple HQ-waveguides in a duct in the presence of higher order modes. However, the practical nature of these engine facilities results in limitations with regard to the fundamental research knowledge that could be gained from testing in a more controlled laboratory environment.
A series of experiments was conducted at the NASA Langley Research Center 0.30 m ducted fan test facility where detailed modal measurements were performed. The main goals of this research endeavor were to evaluate the accuracy of the previously developed theoretical model and provide insight into the noise control mechanisms. Experiments were performed with different disturbance mode structures, number of HQ tubes and arrays, and axial positions. The modes in the duct were generated with an array of acoustic drivers (no flow case) and measured with logarithmically spaced circumferential and helical microphone arrays located on the duct wall. The modal amplitudes of the incident, transmitted, and reflected modes in the duct were determined from the microphone measurements. This allowed for the comparison of analytical and experimental modal amplitudes, modal powers, total power, and reductions.
The results of this study provide insight into the three noise control mechanisms associated with this approach: reflection, circumferential scattering, and radial scattering. Comparison with the experimental results shows that the model accurately predicts the sound power attenuation except near the cut-off frequency of the modes where it tends to overestimate the attenuation. The effect of the number of tubes in the array and its axial position was also evaluated. Overall, the results of this study validate the general modeling approach for the HQ tube concept.<br>Master of Science
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Le, Bon Caroline. "Le capital de mode : un nouveau concept pour comprendre et expliquer le comportement du consommateur de produits de mode." Thesis, Aix-Marseille 3, 2011. http://www.theses.fr/2011AIX32026.
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La mode est partout et recouvre de nombreux secteurs, produits, et concerne de près ou de loin de nombreux individus. La fidélité aux produits de mode soulève différentes interrogations concernant ce qui incite le consommateur à les choisir, à rester fidèle à la mode et ceci malgré les changements incessants propres à celle-ci. Cependant nous n’avons pas relevé d’approche se rapportant à une explication de cette fidélité basée sur les valeurs apportées par la mode au niveau du produit et indépendamment des caractéristiques physiques et/ou des fonctionnalités de ce dernier. Au cours de cette recherche notre intérêt portera donc sur la compréhension des raisons poussant l’individu à s’associer à la mode. L’analogie par rapport au capital de marque (Keller, 1993), nous incite à penser que de manière similaire à la marque, la mode apporte de la valeur ajoutée au produit en comparaison à ceux jugés non mode. Nous introduirons le concept de capital de mode afin d’appréhender cette valeur ajoutée que la mode apporte aux produits. L’analyse qualitative menée confirme les valeurs ajoutées par la mode au produit que nous avons identifiées. De plus, les résultats de l’étude empirique menée auprès de suiveurs montrent, comme cela était supposé, que l’attachement joue un rôle médiateur dans la relation liant le capital de mode à la fidélité au niveau du vêtement et du téléphone mobile. Les valeurs ajoutées par la mode contribuent donc au développement d’un attachement et d’une fidélité de la part de l’individu à l’égard de ce qui est mode dans les catégories de produits étudiés. Notre recherche propose ainsi une explication de la fidélité à la mode grâce au capital de mode<br>Fashion transcends domains, applies to almost any kind of product and concerns many people. The loyalty towards fashion products raises questions about why and how products appeal to consumers, despite their constantly varying attributes. Furthermore, little is known about how fashion trends may induce people to stay loyal to fashion products. We are not aware of any other approach that explains consumer behavior on the basis of fashion value per se, that is, that a fashion product is of interest because it is explicitly perceived as a fashion item. We propose a new explanation for consumers’ interest in and loyalty to fashion products. Extending the concept of consumer-based brand equity (Keller, 1993), we propose that consumer-based fashion equity may account for the role that fashion plays, in determining consumers’ loyalty—similar to the way brand equity explains why high equity brands appeal more to consumers than do low equity ones. We introduce the concept of fashion equity to account for the value that fashion adds to products. The exploratory study conducted with followers confirms the values added by fashion to product and the results of our analysis demonstrates that attachment is a mediator in the relationships fashion equity-attachment-loyalty for fashion clothe and mobile phone. Therefore, these values contribute to the development of fashion attachment and fashion loyalty. Our research suggests an explanation of loyalty towards fashion thanks to fashion equity
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Bochkova, Elena. "Concepts avancés de métamatériaux pour l'électromagnétisme et la photonique." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS441/document.
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Les méta-surfaces permettent de contrôler efficacement es rayonnements électromagnétiques en manipulant la phase, l'amplitude et la polarisation des ondes. Pour de nombreuses applications, telles que des fonctions d’agilité, de commutations et de détection, des surfaces de haute performance sont nécessaires. L’objectif de cette thèse est d'explorer des méthodes innovantes permettant d'améliorer les facteurs de qualité des méta-surfaces dans les domaines micro-ondes et optique. La limitation des méta-surfaces est généralement liée aux pertes par rayonnement et à l'absorption non radiative. L'étude se concentre sur des solutions permettant la suppression des pertes de rayonnement en utilisant des concepts de mode sombre et de résonance de Fano. Un mécanisme d'excitation direct de mode sombre dans un résonateur individuel basé sur l’adaptation de symétrie est proposé. La possibilité d'améliorer l'efficacité de la réponse magnétique en optique est présentée. L'analyse de l'excitation par résonance de Fano dans un système de résonateurs couplés identiques est également réalisée sur la base du formalisme de la théorie des modes couplés. Deux configurations générales correspondant à l'arrangement spatial symétrique et énantiomères des résonateurs sont considérées. Dans le premier cas, le système de cavité formé par les méta-surfaces très proches fournit des caractéristiques spectrales très étroites et une sensibilité efficace élevée par rapport aux cavités Fabry-Perot conventionnelles. Dans le second cas, les caractéristiques de conception permettent de contrôler la suppression des pertes de rayonnement, permettant d'augmenter considérablement le facteur de qualité de la résonance de Fano<br>Metasurfaces allows an effective control of electromagnetic radiation by manipulating phase, amplitude and polarization of electromagnetic waves. For numerous applications including tunable, switchable and sensing functionalities, high performance metasurfaces are required. The goal of this thesis is to explore innovative methods enabling to improve the quality factors of metasurfaces in microwave and optical domains. The limitation of metasurfaces is generally related to radiation losses and non-radiative absorption. The study is focused on solutions allowing the suppression of radiative losses by using concepts of dark mode and Fano resonance. A direct dark mode excitation mechanism in individual resonator based on symmetry matching is proposed. The possibility to enhance magnetic response efficiency in optical frequency range is presented. Analysis of Fano resonance excitation in a system of identical coupled resonators is also performed on the basis of coupled mode theory formalism. Two general configurations are considered corresponding to symmetric and enantiomeric space arrangement of resonators. In the first case, cavity system formed by near-field coupled metasurfaces provides sharp spectral characteristics and high efficient sensitivity compared to conventional Fabry-Perot cavities. In the second case the design features enables to control suppression of radiation losses, allowing to considerably increase Fano resonance quality factor
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Ali, Sheikh Nijam. "A new radio frequency switch-mode power amplifier concept for wireless applications." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43065.
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Although RF switch-mode power amplifiers (SMPAs) are theoretically attractive with the potential to achieve very high power efficiencies, experimental realizations at high frequencies have yet to yield significantly better efficiency than conventional analog technology. Most SMPA designs are based on class D or class S circuits, and in these circuits, power efficiency is significantly reduced when the switching signal is changed from periodic to non-periodic. In this work, a new SMPA architecture is proposed. Instead of employing reflective out-of-band matching conditions used in class D/S circuits, the switch is matched to a broadband load which creates dissipative out-of-band impedances. The broadband load significantly improves switching conditions especially for non-periodic signals. The broadband load is implemented as a complementary diplexer which separates in-band and out-of-band signal power at the output of the SMPA. An energy recovery
loop using out-of-band signal power is proposed to significantly reduce the sensitivity of the overall power efficiency to changes in the peak to average power ratio of the source signal. Experimental and simulation results are shown for the new SMPA architecture.
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Stuhldreher, Kelly M. "ARMY STRONG: STIGMATIZING CONCEPT FOR THOSE THAT DO NOT FIT THE “SUPER SOLDIER/MACHO MAN” MOLD OR CONCEPT OF GREATNESS?" Kent State University Honors College / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1336427470.
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Bore, Isabelle. "Vérité et liberté chez Sir Thomas More 1478-1535." Paris 3, 2004. http://www.theses.fr/2004PA030058.
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À la suite de saint Jean, Thomas More suggère que la vérité rend libre. Don du Père, la vérité est d'abord définie en termes de loi, ce qui lui confère une dimension sociale à laquelle il ne faut pas cependant la limiter. Dans le monde religieux du début du XVIe siècle, la vérité se définit aussi spirituellement en tant que foi au Christ. Comme la loi libère des conflits individuels, la foi libère des entraves du péché. Les deux définitions ne sont pas données simultanément. More s'intéresse d'abord à la loi et ensuite à la foi. Grand connaisseur des Pères de l'Église qui insistent sur la continuité entre l'Ancien et le Nouveau Testament, More signifie par là que la révélation de la vérité est un long processus historique. Cette double définition s'enracine dans une vision théocentrique de la société qui fait de More un homme plus proche du Moyen-Âge que de la Renaissance<br>In Saint John's wake, Thomas More suggests that truth makes free. As a gift from the Father, truth is first analyzed in legal terms. It gives the notion a social dimension, to which it cannot be limited. In the early religious sixteenth century, truth is also considered spiritually as faith in Christ. As the law silences individual conflicts, faith frees man from the shackles of sin. Both definitions are not given simultaneously. More is first interested in the law and then in faith. Used to reading the Fathers of the Church who insist on the continuity between the Old and the New Testament, More means that the revelation of truth is a long historical process. This twofold definition is rooted in a theocentric vision of society which makes More closer to the late Middle Ages than to the early Renaissance
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Elkafrawy, Abdelrahman [Verfasser]. "Concept and design of a high speed current mode based SAR ADC / Abdelrahman Elkafrawy." Ulm : Universität Ulm, 2016. http://d-nb.info/1108434592/34.
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Lanoix, Monique. "More than just voices, the concept of the political self in liberal democratic theory." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ52169.pdf.
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Lake, Brenden M. "Towards more human-like concept learning in machines : compositionality, causality, and learning-to-learn." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/95856.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Brain and Cognitive Sciences, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 211-220).<br>People can learn a new concept almost perfectly from just a single example, yet machine learning algorithms typically require hundreds or thousands of examples to perform similarly. People can also use their learned concepts in richer ways than conventional machine learning systems - for action, imagination, and explanation suggesting that concepts are far more than a set of features, exemplars, or rules, the most popular forms of representation in machine learning and traditional models of concept learning. For those interested in better understanding this human ability, or in closing the gap between humans and machines, the key computational questions are the same: How do people learn new concepts from just one or a few examples? And how do people learn such abstract, rich, and flexible representations? An even greater puzzle arises by putting these two questions together: How do people learn such rich concepts from just one or a few examples? This thesis investigates concept learning as a form of Bayesian program induction, where learning involves selecting a structured procedure that best generates the examples from a category. I introduce a computational framework that utilizes the principles of compositionality, causality, and learning-to-learn to learn good programs from just one or a handful of examples of a new concept. New conceptual representations can be learned compositionally from pieces of related concepts, where the pieces reflect real part structure in the underlying causal process that generates category examples. This approach is evaluated on a number of natural concept learning tasks where humans and machines can be compared side-by-side. Chapter 2 introduces a large-scale data set of novel, simple visual concepts for studying concept learning from sparse data. People were asked to produce new examples of over 1600 novel categories, revealing consistent structure in the generative programs that people used. Initial experiments also show that this structure is useful for one-shot classification. Chapter 3 introduces the computational framework called Hierarchical Bayesian Program Learning, and Chapters 4 and 5 compare humans and machines on six tasks that cover a range of natural conceptual abilities. On a challenging one-shot classification task, the computational model achieves human-level performance while also outperforming several recent deep learning models. Visual "Turing test" experiments were used to compare humans and machines on more creative conceptual abilities, including generating new category examples, predicting latent causal structure, generating new concepts from related concepts, and freely generating new concepts. In each case, fewer than twenty-five percent of judges could reliably distinguish the human behavior from the machine behavior, showing that the model can generalize in ways similar to human performance. A range of comparisons with lesioned models and alternative modeling frameworks reveal that three key ingredients - compositionality, causality, and learning-to-learn - contribute to performance in each of the six tasks. This conclusion is further supported by the results of Chapter 6, where a computational model using only two of these three principles was evaluated on the one-shot learning of new spoken words. Learning programs with these ingredients is a promising route towards more humanlike concept learning in machines.<br>by Brenden M. Lake.<br>Ph. D.
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Juarez, Kristina M. "Examining the MOVE Program: Exploring program impact and perceptions of the concept of leadership." Scholarly Commons, 2014. https://scholarlycommons.pacific.edu/uop_etds/212.
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This thesis explored the ways in which co-curricular programming affected students' development through a case study of the Mountains, Ocean, Valley Experience (MOVE) program at University of the Pacific. This study assessed the learning outcomes related to the MOVE program based on the student participants' perceptions of development and learning. In addition to finding support for most of the program identified learning outcomes, themes including the development of self-awareness, meaningful relationship cultivation, and a connection to the university emerged. Leadership development was also explored as it pertains to this program. Students at this particular institution appeared to begin transitioning through leadership identity development as defined by Komives et al. (2006) in terms of their understanding of the concept of leadership. Implications for future research and practice are also discussed.
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León, Masich Antonio. "High voltage efficient lighting based on the loss-free resistor concept." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/310217.
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En aquesta tesi s'utilitza la noció de resistor lliure de pèrdues (LFR) per dissenyar fonts d'alimentació destinades a iluminació eficient com son els light emmiting diodes (LEDs), làmpades d'alta intensitat de descàrrega (HID) i làmpades d'inducció sense electrodes (IEFL), amb la finalitat de reduir el consum elèctric tant en aplicacions domèstiques com industrials.
Aprofitant la naturalesa del LFR, es a dir, un resistència emulada al port d'entrada y una font de potència al port de sortida, les làmpades mencionades anteriorment son alimentades a potència constant independentment del tipus de làmpada i de la seva impedància.
La técnica de control en mode de lliscament ha sigut aplicada als convertidors per imposar el comportament de LFR treballant en mode de conducció contínu (CCM) en alguns casos, i en d'altres a la frontera entre CCM i mode de conducció discontinu (DCM). Aquesta técnica de control que s'ha utilitzat al llarg de la tesi, ha estat implementada mitjançant técniques de control analògiques i digitals, permetent regular la llum de les làmpades.<br>En esta tesis se usa la noción de resistor libre de pérdidas (LFR) para diseñar fuentes de alimentación destinadas iluminación eficiente como por ejemplo light emmiting diodes (LEDs), lamparas de alta intensidad de descarga (HID) y lámparas de inducción sin electrodos (IEFL), con el fin de reducir el consumo eléctrico tanto en aplicaciones domésticas como industriales.
Aprovechando la naturaleza del LFR, es decir, una resistencia emulada en el puerto de entrada y una fuente de potencia en el puerto de salida, las lámparas mencionadas anteriormente son alimentadas a potencia constante independientemente del tipo de lámpara e impedancia de la misma, .
La técnica de control en modo de deslizamiento es aplicada en los convertidores para imponer el comportamiento de LFR trabajando en modo de conducción continuo (CCM) en algunos casos, y en otros en la frontera entre CCM y modo de conducción discontinuo (DCM). Ésta técnica de control que se a implementado a lo largo de toda la tesis ha sido implementada mediante técnicas de control tanto analógicas como digitales permitiendo regular la luz de las lámparas.<br>In this thesis, the notion of loss-free resistor (LFR) is used systematically to design power supplies for efficient lighting, namely light emitting diodes (LEDs), high intensity-discharge lamps (HID) and induction electrode-less fluorescent lamps (IEFLs) with the aim of reducing the electrical energy consumption in domestic or industrial applications.
The different lamps previously mentioned are supplied at constant power independently of the lamp type and impedance, taking advantage of the LFR nature, i.e. an emulated resistance in the input port and a power source in the output port.
The sliding -mode control technique is applied in the converters to impose the LFR behaviour in continuous conduction mode (CCM) in some cases, and in the boundary between CCM and discontinuous conduction mode (DCM) in other cases. This control technique has been implemented throughout the thesis by either analogue or digital controllers and allows regulating the light emitted by the lamps.
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Malik, Rabia. "Depression kills more than a self : concepts of mental distress amongst Pakistanis." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264992.
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Suteerasan, Sutthi. "Blue-Green Infrastructure on the Move: How Resilience Concepts Travel Between Cities." Thesis, KTH, Urbana och regionala studier, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292293.
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Over the past decades, the fast-changing global climate poses a significant challenge to many cities around the world to embrace resilience concepts, whereby a safe-to-fail planning approach replaces traditional fail-safe practices. The change in perspectives has seen an increase in climate-adapted infrastructural projects being integrated with the new urban planning agendas across the world. The investigation conducted was designed to understand the process of how resilience concepts travel between different cities, by investigating the actors who move policy knowledge, their roles in it, as well as the knowledge transfer process mechanism that is responsible for the movement of such policies. The investigation took advantage of a scoping study technique to answer the research questions, using mostly secondary data and an interview to verify the secondary sources. The findings and the discussion provided insights on who is involved in resilience policies and how these policies are transferred from one place to another. The investigation uncovered the influence policy mobilizers has on the movement of policy knowledge, as well as how the mobilization of policy knowledge can both be beneficial or detrimental, depending on the way it was moved or implemented.<br>Under de senaste decennierna utgör det snabba föränderliga globala klimatet en betydande utmaning för många städer runt om i världen med att anamma motståndskraftskoncept, där en planeringsstrategi med säkerhet att misslyckas ersätter traditionella felsäkra metoder. Förändringen i perspektiv har ökat klimatanpassade infrastrukturprojekten som integrerats med nya stadsplaneringsagendorna över hela världen. Studien genomfördes för att få en förståelse av hur motståndskraftskonceptet färdas mellan olika städer och detta genomfördes genom att undersöka de aktörer som förflyttar politisk kunskap och deras roller i den samt den kunskapsöverföringsmekanism som är ansvarig för rörelsen av sådan politik. Studien utnyttjade en scoping-studieteknik för att få svar på forskningsfrågorna, med mestadels sekundär data och en intervju för att verifiera sekundärkällorna. Resultaten och diskussionen gav insikter om vem som är inblandad i motståndskraft och hur policy överförs från en plats till en annan. Studien avslöjade även inflytande av politiskt mobilisering och kunskap som både kan vara fördelaktig eller skadlig beroende på hur den flyttades eller genomfördes.
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Bonnett, Laura. "Toward a more inclusive concept of citizenship, women and the 1981 Ad Hoc Constitutional Conference." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq26902.pdf.
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Bonnett, Laura (Laura L. ). 1969 Carleton University Dissertation Canadian Studies. "Toward a more inclusive concept of citizenship; women and the 1981 Ad Hoc Constitutional Conference." Ottawa.:, 1997.
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Cornell, Benjamin Laurence. "More Than the Looking Glass| The Associations Between School-Based Recognitions and Student Self-Concept." Thesis, University of California, Riverside, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10620041.
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<p> Self-concept is related to student academic achievement and locus of control (Coleman et al., 1966), intrapersonal and interpersonal processes (Markus & Wurf, 1987), and many long-term outcomes, such as satisfaction with one’s job, marriage, and life in general (Mortimer et al., 1982). Although self-concept is fairly malleable in early adolescence, it becomes more stable and rigid in high school (Bachman, O’Malley, & Johnston, 1978; Protinsky & Farrier, 1980). While interventions targeting self-concept have generally been found to be successful (Hattie, 2014), the associations between specific school- based recognitions for achievement and student self-concept have yet to be investigated. Using data from the National Educational Longitudinal Study of 1988 (NCES, 1996), the following analysis investigated the associations between different school-based recognitions for achievement and students’ self-concept. In this study, a set of school- based recognition variables was identified and hierarchical linear modeling (HLM) analyses was used to build an ANCOVA with random effects model predicting student self-concept in the 10th grade while controlling for gender, race, socioeconomic status (SES), and prior self-concept (8th grade) scores. Results indicate support for the use of HLM statistical methods and the inclusion of the aforementioned covariates. However, none of the predictor variables from the identified set of school-based recognition variables were significantly related to self-concept when entered into the model. Implications for school psychology research and practice are presented within a multitiered systems of supports (MTSS) framework, including suggestions for the implementation of positive behavioral interventions and supports (PBIS).</p><p>
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Mattin, Deborah C. "A National Study Comparing Baldrige Core Values and Concepts with AACN Indicators of Quality| Facilitating CCNE-Baccalaureate Colleges of Nursing Move toward More Effective Continuous Performance Improvement Practices." Thesis, The University of Toledo, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3726788.
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<p> The AACN has asked academic leaders to align the performance of their organizations to the prescribed standards within the <i>Essentials of Baccalaureate Education for Professional Nursing Practice</i> document and has provided indicators of quality suggestions for program enhancement as a means of promoting continuous performance improvement. However, the AACN has not prescribed a strategy that specifies the manner in which colleges should achieve these benchmarked standards, which has created uncertainty among administrators about whether the indicators of quality lead to improvements that are actually indicative of improved performance.</p><p> This dissertation used multiple linear regression research design to determine whether predictive relationships exist between the American Association of Colleges of Nursing (AACN) indicators of quality and the Baldrige core values and concepts of performance improvement within Commission on Collegiate Nursing Education accredited baccalaureate colleges of nursing.</p><p> The purpose of this study was to determine whether the behaviors associated with specific AACN indicators of quality reflect behaviors that the Baldrige core values and concepts have already proven to be successful in achieving continuous performance improvement. The results revealed nine AACN indicators of quality behaviors most likely to enhance performance improvement outcomes within baccalaureate colleges of nursing. They include; (1) Resources are budgeted for research, development, business operations, public relations, marketing, and human resources; (2) Establishing and upholding policies that reflect faculty and leadership development resources; (3) Student experiences include service learning opportunities; (4) Practice partnerships include collaborative practice initiatives; (5) Collecting data and making program changes that focus on the level of graduate satisfaction with their preparation for the profession; (6) Faculty have input into the governance of the college/school; (7) The majority of faculty have a presence in state, regional, national, and international professional activities; (8) Opportunities for baccalaureate graduate's employment with practice partnerships; and (9) Formal mentoring program for clinical preceptors.</p><p> The results underline the fact that continuous performance improvement within baccalaureate colleges of nursing is a deliberate and dynamic analysis-driven endeavor dependent on an organization's ability, willingness, and initiative to continually strive to narrow the chasm between actual and potential performance results.</p>
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Mattin, Deborah C. "A National Study Comparing Baldrige Core Values and Concepts with AACN Indicators of Quality: Facilitating CCNE-Baccalaureate Colleges of Nursing Move toward More Effective Continuous Performance Improvement Practices." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1357281352.
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Jenney, Ted J. "The concept of subjectivity a mode of examination and discovery with reference to Kierkegaard and Wittgenstein /." Theological Research Exchange Network (TREN), 1985. http://www.tren.com.
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Guermazi, Mohammad. "Le concept d'incapacité fonctionnelle : adaptation d'outils de mesure à la langue et au mode de vie." Dijon, 2004. http://www.theses.fr/2004DIJOMU06.
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Objectifs : analyse des difficultés de traduction en arabe des questionnaires et description des méthodes de traduction et de validation des tests, application aux indices fonctionnels. Méthodologie : Quatre indices fonctionnels ont été traduits en langue arabe et adaptés aux conditions socioculturelles et au mode de vie dela population tunisienne. La méthode d etraduction contre-traduction a été appliquée, suivie d'une révision par un comité d'expert et une étude préliminaire. Les qualités métrologiques de chaque indice ont été par la suite étudiées (validité et répétabilité) sur des populations de patients tunisiens. Résultats : Les difficultés de la traduction des indices fonctionnels sont explicitées, en particulier les différents types d'équivalence langue source/langue cible (sémantique, technique; idiomatique; conceptuelle. . . ). Les difficultés rencontrées sont dues essentiellement aux différences entre le littéraire et le dialecte. Un seul indice a été jugé valide sans modification du nombre d'items. Un indice a été validé après élimination de deux items. Les deux autres indices avaient des qualités métrologiques insuffisantes. Pour l'un nous avons proposé et validé une version modifiée, pour le deuxième nous avons développé et validé un nouvel indice. Conclusion : La méthode courante alliant traduction et contre-traduction est nécessaire mais reste insuffisante et doit être accompagnée au minimum d'un pré test et d'une révision par un comité d'experts. Des recommandations spécifiques pour la traduction adaptation des indices en langue arabe sont données. L'étude des qualités métrologiques est indispensable après toute traduction même la plus méthodique.
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Mouli, Richard. "Un modèle d'animation comportementale fondé sur le concept de personnage." Toulouse 3, 1994. http://www.theses.fr/1994TOU30192.
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Le but de l'animation en synthese d'images est de definir des concepts et des outils pour permettre a l'utilisateur de produire des sequences animees. Les travaux que nous presentons s'inscrivent dans le domaine de la problematique liee a la definition des mouvements des objets mis en scene. L'etude que nous avons realisee porte sur un modele de haut niveau. Les objectifs qui ont guides cette recherche sont la conception et la realisation d'un systeme capable d'animer un nombre important d'objets et de prendre en compte les interactions qu'ils subissent. Nous introduisons pour cela le concept de personnage auquel nous associons un comportement. Un personnage est un objet autonome, actif dont l'evolution dans le temps est le produit de l'evaluation de son comportement en fonction de la connaissance qu'il possede sur son environnement local. Nous decomposons l'ensemble des personnages en trois sous-classes (les personnages acomportementaux, reflexes et intelligents) selon le niveau de comportement qui leur est associe. Les personnages peuvent n'etre soumis seulement aux lois de la physique, reagir automatiquement a des situations simples ou utiliser un raisonnement, fonde sur des regles et un moteur d'inference (comme en prolog) pour analyser la situation dans laquelle ils se trouvent pour decider des actions a realiser. Dans les deux derniers cas, ils utilisent un ensemble de capteurs qui leur permettent d'acquerir des informations sur l'environnement et de determiner la situation presente. Nous introduisons le concept de capteur bati sur un mecanisme actif d'interrogation. Nous presentons aussi des solutions dans le domaine de la coherence d'animation. Plus particulierement, nous introduisons une nouvelle approche pour l'echantillonnage de la dimension temporelle. Grace au systeme realise en langage eiffel sur stations de travail unix dans le cadre de cette these, nous avons produit les sequences animees
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Ameli, Nikola, Isabela Schachinger, and Natela Khrikina. "Visuell kommunikation : En studie om könsneutralt mode." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12730.
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Hur kan modeföretag genom sin kommunikation leva upp till sina koncept om könsneutralt mode? Under en längre tid har en debatt kring könsroller och könsuppdelning pågått, och modebranschens sätt att skildra män och kvinnor har kritiserats hårt. Modet framhäver vad som skiljer sig mellan det manliga och det kvinnliga alltmer, samtidigt som fler modeföretag börjar förmedla koncept om könsneutralt mode. Det är inte bara plaggen i sig som gör det svårt att könsöverskrida, media har även en stor påverkan, både på samhället som stort, och på individnivå. Vad konsumenter önskar se i media stämmer inte alltid med det företagen kommunicerar ut. Samhället strävar efter ökad genusmedvetenhet, jämställdhet och jämlikhet. För att en skillnad skall kunna ske krävs en förändrad inställning och en faktisk förändring, inte minst i modebranschen. En del forskare menar att kampanjer med representationer av icke stereotypiska könsroller spelar en positiv social roll för att en samhällsförändring gradvis skall ske. Vi har undersökt två utvalda företag som kommunicerar den typen av reklam och om deras butiker lever upp till de koncepten som de förmedlar i kampanjerna. Makt gestaltas i vad en bär för plagg. Åhléns ville med sin kampanj, Bryt Klädmaktsordningen , belysa förhållandet mellan kön, plagg och makt. Forskare menar att en kvinna klättrar upp i maktstegen om hon bär stereotypt maskulina plagg medan en man går ner i maktstegen. Samhället har accepterat att se kvinnan representera något som värderas lika högt som mannens plagg, vilket förknippas med dagens unisexmode. Hur skulle det se ut om rollerna byttes? Syftet med denna uppsats var att undersöka hur modebutiker genom sin kommunikation lever upp till sina koncept om könsneutralt mode samt föreslå hur företagen kan förbättra kommunikationen av begreppet könsneutralt mode till konsumenterna. För att kunna besvara syftet användes teoretiska modeller som identifierar vart det brister i kommunikationen som företagen försöker att förmedla till konsument. Det empiriska materialet bestod av två intervjuer, fyra fokusgrupper, observationer och pressmaterial. Först utfördes en intervju med en doktor i modevetenskap som också är idékläckare bakom Åhléns kampanj “Bryt klädmaktsordningen”. En intervju genomfördes med sekreteraren på transföreningen Full Personality Expression Sweden. Sedan fick vi en pressrelease utav projektledaren bakom & Other Stories kampanj “The Gaze & Other Stories”. Därefter lät vi våra fokusgrupper se samtliga kampanjfilmer och tolka vad för koncept kampanjerna förmedlar för att sedan diskutera kring hur företag kan leva upp till konceptets idé i deras fysiska butiker. Två observationer gjordes i de två respektive företagens butiker vars kampanjer vi utgått ifrån. Modebranschen är en av många olika sändare som utsätter oss för budskap och ideal, varför den blir mer synlig än andra branscher i fråga, handlar om att den är påtagligt mer synlig. Vi, ihop med alla respondenter hoppas på att en förändring är på väg, mot mer jämställdhet och jämlikhet, samt att den nya generationen som nu stiger in i branschen kommer att bidra till en förändring i vad som sänds ut genom de olika marknadsföringskanalerna. Viktigt att tänka på är att förändringar sker konstant, även inom modet. En förändring större än trender kommer att ske men frågan är: När?<br>Visual communication of gender neutral clothing within the fashion industryA study that examines whether chosen companies live up to the concept of gender neutral fashion. How can fashion companies through their communication live up to their concepts of gender neutral fashion? During a longer period of time there has been a debate on gender roles and segregation of genders, also within the fashion industry. The way it divides and depicts the differences between men and women has been criticized for a long time. A change is coming, there are more and more fashion companies that mediate concepts of gender neutral fashion within their communication. What consumers wish to see when it comes to the way fashion companies communicate concepts about gender neutral fashion do not often accord with the way they are actually communicating it. The concepts are not cohesive, the way it is displayed in their communication does not match what you are exposed to in their stores. Our society strives for an increase of gender awareness, gender equality and equality. In order for a change to happen, a change of attitude and an actual alteration needs to happen, not at least in the fashion industry.
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Dahlén, Jenny, and Victor Mandersson. "Why are Chines Companies attracted by the Showroom Concept? - Culture´s Impact on Choice of Entry Mode." Thesis, Kristianstad University College, Department of Business Administration, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-4054.
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<p>As the world is becoming increasingly interconnected, companies from all over the world begin to internationalize their operations. Many researchers suggest that the world is becoming more homogenous. Consequently, one would think that companies’ internationalization processes would be similar to each other. However, there are some evident differences between the internationalization patterns of different countries. Recently, there has been a huge surge of Chinese foreign investments and operations. This has led to a rather new phenomenon, which has spread to many Western nations. Thousands of Chinese companies simultaneously enter new markets, enabled by so-called ‘showrooms’. Despite minimal previous international experience, Chinese companies engage in relatively high-commitment entry modes from the start. No equivalent patterns or entry modes exist in Western countries. Therefore, the question emerges; is the variance of entry mode choices and internationalization processes culturally dependent? However, existing literature about the impact of culture on choice of entry mode is scarce. Furthermore, none of the previous research has dealt with the use of the showroom, or any other export entry mode. As a result, we decided it was necessary to explore the subject further. In our research, we identified a new variable, which has never before been used to explain the cultural impact of entry mode choice. </p><p>This variable was then tested by distributing a questionnaire via e-mail to the target group - Chinese companies using showrooms as their international expansion strategy. More specifically, we concentrated on those who operate showrooms in the United Arab Emirates. Moreover, our identified variable was recognised and supported by the participants of our sample.</p>
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Trifone, James D. "The efficacy of concept mapping in motivating students to take a more meaningful approach to learning biology." Thesis, Lancaster University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504181.
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Sonnier, Laure. "Un nouveau mode de signalisation par transfert intercellulaire de facteurs de transcription : du concept aux applications : l'exemple d'Engrailed." Paris 6, 2006. http://www.theses.fr/2006PA066319.
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Feinstein, Jeffrey Allen. "Need for cognition is more than "they think" : representation and structure of cognitive activity within the self-concept /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487941504294518.
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Inamdar, Sharang. "Estimation of Frequency and Damping of a Rotating System using Mode Enhanced Order Tracking (MEOT) and Virtual Sensor Concept." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479820429126763.
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Roe, Sara Hill. "How Is the Concept of Flourishing Centrally Compelling in a Move toward Sustainability? A Case Study of the Aeolian Islands." Thesis, California Institute of Integral Studies, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10684814.
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<p> This dissertation explores the role of the concept of flourishing as it moves toward sustainability by examining a theoretical case study of the Aeolian Islands, and in particular, the island of Lipari. Lipari is challenged by four core problems: lack of potable water, lack of collaboration on policymaking, lack of a shared vision, and lack of a sustainable economy. Each core problem is evaluated as a set of complex and interrelated systems. Through this analysis, the leading qualities associated with a flourishing society are explored to determine the potential levers that would be most effective in shifting the islands from unsustainable to sustainably flourishing. Using the framework of complexity, this paper integrates a variety of fields such as ecology, economics, public policy, and sociology in developing a more comprehensive definition of the concept of sustainable flourishing.</p><p>
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Sharshavina, Ksenia. "Nouveaux concepts de filtres spectraux ultra-sélectifs pour spectroscopie embarquée." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30264/document.
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Les filtres spectraux à réseaux résonants, ou GMRF (Guided-Mode Resonance Filters), sont une nouvelle génération de filtres à bande étroite et constituent une alternative très prometteuse aux filtres conventionnels multicouches Fabry-Pérot. Le pic de résonance d'un GMRF peut être très fin spectralement et de longueur d'onde de centrage accordable en fonction de l'angle d'incidence. Ces propriétés sont particulièrement importantes pour la spectroscopie. Les travaux antérieurs ont permis de mettre en œuvre une structure originale comportant deux réseaux 1D croisés. Les performances de ce filtre surpassent celles des filtres conventionnels par leur réponse spectrale subnanométrique, leur accordabilité, et leur capacité à s'affranchir de l'influence de la polarisation de l'onde incidente sous incidence oblique. Le but de ce travail est d'explorer les performances ultimes de ce type de dispositif en termes de résolution et taux de réjection, par une approche mêlant théorie, technologie et caractérisation. Nous présentons des résultats expérimentaux d'un filtre en réflexion indépendant de la polarisation, accordable sur 40 nm avec 8.3nm/° d'accordabilité, ayant une réflexion de 10-3 sur une plage de 90nm en dehors de la résonance et un facteur de qualité supérieur à 5000<br>Guided Mode Resonance Filters ( GMRF ) are a new generation of narrowband optical filters and are a very promising alternative to conventional multilayer Fabry-Perot filters. The resonance peak of GMRF can be spectrally extremely thin and with a centering wavelength tunable according to the angle of incidence of the light. These properties are particularly important for spectroscopy. Previous works have helped to implement an original structure with two 1D crossed gratings. The performance of this filter overpasses those of conventional filters in their spectral subnanometric response, tunability and their ability to overcome the influence of the polarization of the incident wave under oblique incidence. The aim of this work is to explore the final performances of such devices in terms of resolution and rejection rate, thanks to an approach combining theory, fabrication technology and characterization. We present experimental results of a polarization independent reflective filter, tunable over 40nm with a tunability of 8.3nm / °, having a reflection of 10-3 on a 90nm range outside the resonance and a quality factor over 5000
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Moreira, Cabral Kenia. "De la haute couture au fast fashion : regard sur la mode et ses paradigmes comme reflet de la postmodernité." Paris 5, 2011. http://www.theses.fr/2011PA05H006.
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La mode est un indice révélateur des changements des comportements dans une société donnée. Dans cette étude, nous proposons un nouveau cadre théorique pour regarder ces transformations afin de contribuer à la théorisation du phénomène. À partir des notions de “paradigme” et “matrice disciplinaire” du philosophe Thomas Kuhn ainsi que l’approche de la sociologie compréhensive et les théories de la postmodernité, nous entendons regarder les transformations de la mode comme des révolutions. Ces dernières, engendrées par les grands couturiers depuis la moitié du XIXe siècle puis par les créateurs dès les années 60, définissent la « matrice stylistique » de la mode aujourd’hui. Elle est composée par les paradigmes de la haute couture, du prêt-à-porter et du fast fashion. L’approche que nous proposons entend voir chaque paradigme de mode comme reflet de son époque. Autrement dit, la haute couture représente la modernité tandis que la mode prête à porter attire l’attention sur une époque de transition. Le dernier paradigme, imposant une nouvelle dynamique aux changements de mode, vient s’ajouter à la matrice formée pendant les années 60. Cette dernière est le reflet de la postmodernité<br>Fashion is a revealing indication of the behaviours changes in a given society. In this study, we offer a new theoretical context to these transformations in order to contribute to the theorization of the phenomenon. From Thomas Kuhn's notions of "paradigm" and "disciplinary matrix", from the comprehensive sociology approach and the postmodernity theories, our aim is to consider the fashion changes as revolutions. These ones, created by the fashion designers from the mid nineteenth century, then by the creators in the sixties, define the “stylistic matrix” of today’s fashion. It is composed of the haute couture, prêt-à-porter and fast fashion paradigms. The approach that we offer here sees each fashion paradigm as a reflection of its time. In other words, haute couture represents modernity while prêt-à-porter fashion draws our attention to a transition time. The last paradigm, imposing a new impulsion on the fashion changes, is tacked on to the matrix formed during the sixties. This one is the reflection of postmodernity
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Muriel, Prévot-Carpentier. "Les " conditions de travail " : proposition de modélisation pour l'usage. Entre épistémologie et philosophie sociale, un mode de traitement ergologique du concept." Phd thesis, Aix-Marseille Université, 2013. http://tel.archives-ouvertes.fr/tel-00925799.
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A partir d'une problématique suscitée par l'élaboration de l'Observatoire des Conditions de Travail de l'Agence Nationale pour l'Emploi (ANPE) auquel nous avons participé en Convention Industrielle de Formation par la Recherche (CIFRE), la thèse retrace les généalogies conceptuelles qui ont amené aux visions actuelles du concept de " conditions de travail ", qui s'est institutionnalisé en France vers 1970 en restant sans définition. Marqué au niveau de sa structure par une conception factorielle issue de la division du travail, et par une conception séquentielle issue du taylorisme qui s'y est superposée, il se constitue progressivement au niveau de son sens dans les débats du XIXe siècle dans une dialectique entre droit-liberté et pouvoir-domination qui s'apparente à une conception politique des conditions pour le travail, subsumée à partir du mouvement de rationalisation du début du XXe siècle par une conception organisationnelle de conditions entièrement normées ou normables. Ces conditions tendent alors à être traitées dans des négociations institutionnelles, en désadhérence de la dialectique permanente et sans cesse renouvelée du normatif et du normé dans l'activité. Cette distance entre le concept et la vie est une usurpation épistémologique dont nous proposons le dépassement par une modélisation ergologique du concept mettant en visibilité les multiples entités de débats de normes, et donc de valeurs, du micro au macro dans l'espace social. Ce mode de traitement renouvelé du concept au profit de ceux qui travaillent, favoriserait l'émergence d'alternatives laissées en pénombre dans l'activité, sources potentielles de performance pour les entités productives.
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Roudot, Catherine. "Le père imperceptible dans les problématiques vampiriques et leur mode de transmission : le vampirisme comme concept opérationnel dans les pathologies d'emprise." Paris 7, 2012. http://www.theses.fr/2012PA070051.
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Le vampirisme devient un concept opérationnel utilisé pour les pathologies où prédomine l'emprise. Il figure l'indistinction sujet-objet du narcissisme primaire, l'attraction délétère de la pulsion de mort, et la non-représentation d'une transmission d'une non-séparation, source de carences narcissiques, la compulsion de répétition et son au-delà, et le passage d'une génération à une autre. L'individuation sujet/objet n'existe plus, le patient se retrouvant dépositaire de formes ancestrales de vampirismes familiaux. Ce concept fait apparaître des pathologies non définies par ailleurs. Le vampirisme à la base de certains troubles narcissiques, est un lien involutif et asymbolique caractérisé par l'attraction à une mère insuffisamment morte qui revient hanter et par une identification au père mort. Deuils sans fin, traumatismes, relations d'absence ou de trop grande présence et d'emprise dans la génération précédente, entraînent des distorsions dans l'établissement des limites spatiales mais aussi temporelles chez un descendant : cette transmission vampirique devient alors vectrice de carences et de blessures narcissiques irreprésentables, de destructivité et de désubjectivation. Ce concept illustre de façon particulièrement éclairante, les modalités selon lesquelles un sujet aspiré par un autre, ici bien réel et incarné, en vient à disparaître comme tel. Le mythe du vampire est le mythe de la séduction, de la contamination du mal pour devenir le mythe de l'irreprésentable<br>The vampirism is an operational concept used for the pathologies where the predominant influence prevails. It represents the indissociability subject/object of the primary narcissism, the deleterious attraction to death wish, and the non-representation of a transmission of a non-separation, source of narcissistic deficiencies, the compulsion of repetition and its beyond, and the passage from a generation to another. The individuation subject/object does not exist anymore, the patient finding himself back possessor of ancestral forms of family vampirism. This concept comes to light pathologies not defined otherwise. The vampirism at the root of certain narcissistic disorders, is an involute and asymbolic link characterized by the attraction to a mother insufficiently dead who comes back to haunt and by an identification to the dead father. Endless bereavements, traumas, absence relationship or too big presence and influence in the previous generation, leading to distortions in the establishment of the spatial boundaries but temporal too at a descendant: this vampiric transmission becomes medium of deficiencies and unrepresentable narcissistic injuries, destructivity and desubjectivation. This concept serves to illustrate with a particularly illuminating way, the modalities under which a subject drawn by another, here quite real and incarnate, is reduced to disappear as such. The myth of the vampire is the myth of the seduction, of the contamination of evil to become the myth of the unrepresentable
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Prevot-Carpentier, Muriel. "Les "conditions de travail" : proposition de modélisation pour l'usage : Entre épistémologie et philosophie sociale, un mode de traitement ergologique du concept." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM3111.
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A partir d’une problématique suscitée par l’élaboration de l’Observatoire des Conditions de Travail de l’Agence Nationale pour l’Emploi (ANPE) auquel nous avons participé en Convention Industrielle de Formation par la Recherche (CIFRE), la thèse retrace les généalogies conceptuelles qui ont amené aux visions actuelles du concept de « conditions de travail », qui s’est institutionnalisé en France vers 1970 en restant sans définition. Marqué au niveau de sa structure par une conception factorielle issue de la division du travail, et par une conception séquentielle issue du taylorisme qui s’y est superposée, il se constitue progressivement au niveau de son sens dans les débats du XIXe siècle dans une dialectique entre droit-liberté et pouvoir-domination qui s’apparente à une conception politique des conditions pour le travail, subsumée à partir du mouvement de rationalisation du début du XXe siècle par une conception organisationnelle de conditions entièrement normées ou normables. Ces conditions tendent alors à être traitées dans des négociations institutionnelles, en désadhérence de la dialectique permanente et sans cesse renouvelée du normatif et du normé dans l’activité. Cette distance entre le concept et la vie est une usurpation épistémologique dont nous proposons le dépassement par une modélisation ergologique du concept mettant en visibilité les multiples entités de débats de normes, et donc de valeurs, du micro au macro dans l’espace social. Ce mode de traitement renouvelé du concept au profit de ceux qui travaillent, favoriserait l’émergence d’alternatives laissées en pénombre dans l’activité, sources potentielles de performance pour les entités productives<br>Stemming from an issue concerning the creation of the observatory of the working conditions within the French National Employment Agency (ANPE) that we participated in as beneficiary of an industrial research grant (CIFRE), the thesis retraces the conceptual genealogies that led to the current views on the concept of « working conditions », which was institutionalized in France around 1970 but remain undefined. Initially structured according to a factorial understanding based on the division of labour, then extended using sequential design derived from taylorism, its meaning is progressively built during the nineteenth century through dialectics between rights-freedom and authority-domination which refers to a political understanding of the working conditions, subsumed from the early twentieth century’s rationalization movement by an organizational design of fully standardized or standardizable conditions. These conditions then tend to be exploited within institutional negotiations, being disconnected from continuously renewed dialectics between normative and normed in activity. This gap between the concept and real life is an epistemological usurpation which we propose to surpass using an ergological way of modeling the concept that brings visibility to multiple groups of debates regarding standards, and therefore values, from micro to macro in the social space. This renewed way of addressing the concept which benefits to those who work, could promote the emergence of alternatives left in the semi-darkness of the activity, potential sources of performance for productive groups
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Kjellin, Åsa, Anna Stridsberg, Johanna Bornholm, and Eugenia Kapsalis. "Thinking more like a client. : Designfaktorer som påverkar valet av tjänsteföretag." Thesis, Södertörn University College, School of Business Studies, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-1272.
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<p>Companies in the western world can no longer compete by using traditional means such as product and price since the commerce of services continually grows. To avoid similarity and increase competitive advantages modern companies have to be more specified. The competition between companies has increased and customers are harder to reach. Customers of today can afford luxury but trend indicates that originality, identity, and status are more important than factual needs. Products created and consumed at the same time within the service market are often very homogenous (similar). The small differences between companies make it hard to find the grounds of the consumer’s choice also making it imperative for companies to inter-pret the needs, habits, and expectancies of the consumer. A winning con-cept is hard to identify – individualism makes it harder to predict trends, product cycles becomes shorter, and the market becomes more casual, changeable, agile, lively, and impulsive. The purpose of this paper is to examine through quantitative survey which design factors create value for the consumer and how this affects the consumer choice. With prospective on the time of service the relation between consumer and company is evaluated in the moment of truth.</p><br><p>Företag i västvärlden kan inte längre vara med och konkurrera med traditionella medel som produkt och pris. Handeln med tjänster växer, för att undvika likriktning och öka konkurrensfördelarna ligger det i tiden för företag att nischa in sig. Konkurrensen om nya kunder hårdnar, och de blir allt svårare att nå. Kunder har idag råd med lyxvaror men trenden pekar på att originalitet, identitet och status är viktigare än faktiska behov. Inom tjänstemarknaden är produkterna som skapas och konsumeras vid samma tillfälle ofta mycket homogena. Det är svårt att veta på vilka grunder konsumenten väljer leverantör eftersom det ofta finns små skillnader mellan företagen. Det är viktigt för företag att förstå och tolka kunders behov, vanor och förväntningar. Det blir allt svårare att identifiera ett vinnande koncept – individualism bryter ner förmågan att förutse trender, produktlivscyklerna blir kortare, detta tillsammans med en mer flyktig, ombytlig, rörlig, livlig, impulsiv marknad. I uppsatsen undersöks vilka designfaktorer som skapar mervärde för kunden och påverkar valet av tjänsteföretag. Syftet med uppsatsen är att med hjälp av kvantitativ undersökning analysera vad det är som gör att kunderna väljer ett visst tjänsteföretag. Samt utvärdera om det går att uppfylla kundernas olika behov genom att addera nya faktorer till en tjänst för att skapa mervärde för kunden. Med perspektiv på servicetillfället utvärderas relationen mellan kund och företag i sanningens ögonblick.</p>
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Harper, Lena May. ""What More Could I Have Done?" A Graduate Student's Experience Teaching Writing About Writing." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/7226.
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As writing about writing (WAW) research enters its "second wave," characterized not only by an increase in data-driven studies that theorize and assess the effectiveness of WAW curricula (Downs) but also by an increase in its prominence and adaptation, particularly among emerging writing studies scholars and teachers (e.g., Bird et al.), a space has opened for more and varied types of research, especially empirical research, to determine its effectiveness and to produce more solid recommendations for training and curriculum development, especially for those who are new to the field. This case study, which highlights how a novice teacher responds to a new teaching experience, aims to address the dearth of empirical research on WAW curricula and to aid other graduate instructors interested in teaching WAW or program administrators interested in implementing WAW. The study reports results from data collected (e.g., interviews, in-class observations, teachings logs) on the experience of a second-year MA graduate student in composition and rhetoric as he taught a WAW-based curriculum in a first-year composition (FYC) class in the beginning of 2016. His twenty students were also research subjects, but only a small portion of their data is reported here. The instructor's experience, chronicled in narrative form, began optimistically, though with a hint of skepticism, and ended in discouragement and even pessimism. These results were largely unexpected due to the instructor's confidence with and knowledge of WAW history, assumptions, and pedagogy and experience teaching FYC. However, his struggle with the approach reveals and confirms several important points for anyone hoping to teach or implement WAW. Particularly, new WAW instructors need sustained training, support, and mentoring to help them properly temper their expectations for the course, correctly and usefully interpret their experiences teaching WAW, successfully transfer prior teaching knowledge and methods to the WAW classroom, and ultimately find their place in WAW instruction.
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Mayo, Ana Veronica. "Atomic emission misconceptions as investigated through student interviews and measured by the Flame Test Concept Inventory." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1362754897.
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Bourdoncle, Emmanuel. "Le concept de traité international. Racines antiques et significations contemporaines." Thesis, Paris 2, 2019. http://www.theses.fr/2019PA020076.
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Instrument essentiel du système juridique international, le traité se caractérise par sa permanence historique et son utilisation étendue. Cette importance peut notamment être soulignée à travers une analyse historique mettant en avant la dimension inhérente à tout système juridique international de l’instrument conventionnel. Dans sa nature comme dans sa pratique, le traité démontre une souplesse et une faculté d’adaptation essentielle que l’Antiquité gréco-romaine permet d’éclairer. En effet, pensé et utilisé largement à cette époque, cet instrument connaît dès ce moment ces principaux traits. Collection d’actes unilatéraux dont l’unité découle de son caractère écrit et la force obligatoire de l’engagement international de ses parties, le traité permet la formation d’obligations internationale diverses conduisant à une application particulière du droit international<br>As an essential instrument of the international legal system, the treaty is characterized by its historical permanence and its extensive use. This importance can be highlighted in particular through a historical analysis putting forward the inherent dimension of the convention to any international legal system. Its nature and its practice demonstrate the treaty flexibility and a capability of adaptation that the Greco-roman Antiquity allows to enlighten. Indeed, thought and used from this time, this instrument knows its main features since this moment. Collection of unilateral acts whose unity derives from its written character and its binding force from the international commitment of the parties, the treaty allows the formation of international obligations leading to a particular application of international law
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Gerrard, Crystal Lynn. ""It's More Than Playing Music:" Perceptions of a Concert Band Program from Members of a Predominantly Latino School Community." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524211163607595.
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Bernath, Victoria Marthe. "'Middle fiddle no more' : British viola concerti and the rise of viola virtuosity (1880 to 1910)." Thesis, University of York, 2015. http://etheses.whiterose.ac.uk/20540/.
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This study investigates the viola as a solo instrument in Britain during the period 1880 to 1910. Current scholarship attributes the increased recognition of the viola and its burgeoning status as a solo instrument to British violist Lionel Tertis from 1910 onwards, disregarding the efforts of foreign-born contemporaries. The lack of scholarship investigating the socio-cultural contexts of the viola in Britain before 1910 perpetuates the notion that violists were, at best, second-rate violinists. However, the late nineteenth century saw a surge of interest in the viola with an awareness of how the middle fiddle’s unique timbral properties might be married with virtuosic technique. Many works featuring the viola as a solo instrument were composed in Britain between 1880 and 1910 and are presented here for the first time. This includes four viola concerti, chamber works for viola-piano, musical novelties, and ten method books, all of which bolstered the technical standard and fledgling profession of violists in Britain. This investigation initially uses archival research to situate the viola in socio-cultural contexts of British music-making. Chapter One reveals examples of viola practitioners and their careers in Victorian concert society (1820 to 1880). Chapter Two uncovers training provision for violists in London conservatoires (1880 to 1910), and Chapter Three illustrates solo violists and their careers in British concert culture (1880 to 1910). The second component of the study is practice-led. Chapter Four considers technical advancements in viola technique. Chapter Five presents a case study which initially investigates aspects of performance practice at the turn of the century relevant to Emil Kreuz’s Concerto for Viola and Orchestra Op.20 (1892) and Cecil Forsyth’s Viola Concerto in G minor (1903). The case study then questions the craft of historically informing the concerti through a comparison of critical and performative interpretations in recorded examples. Concluding statements connect these components to reveal a thriving period in the viola’s history, clarifying misconstrued notions of the instrument’s supposedly impoverished status in British concert culture. Through my original analysis, live and recorded performance, I seek to demonstrate the importance, and to establish a precedent, for performance-based research. By example, I hope to offer new insights for performing these selected viola concerti, and to provide an academic platform to promote performance-based studies at the core of contemporary research methods.
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Selemani, Kamardine. "Analyse et optimisation des chambres réverbérantes à l'aide du concept de cavité chaotique ouverte." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1043/document.
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Ce travail porte sur l'optimisation de la géométrie de chambre réverbérante en s'inspirant du concept de cavité chaotique. Les chambres réverbérantes (RC) sont de plus en plus utilisées comme moyen de test de compatibilité électromagnétique. Elles sont utilisées au-delà d'une fréquence minimale à parti de laquelle les champs sont, dans le volume central de la cavité, statistiquement homogènes et isotropes ; l'obtention de ces propriétés statistiques nécessite l'utilisation d'un mécanisme de brassage, pouvant être mécanique ou électronique. Or, dans les cavités chaotiques, la plupart des modes sont associés à des champs statistiquement homogènes et isotropes, et ceci sans avoir recours à aucun brassage. C'est pourquoi un rapprochement entre chambres réverbérantes et cavités chaotiques a été fait dans ce travail.En premier lieu, nous nous intéressons à des cavités chaotiques 2D obtenues par des modifications successives d'une cavité rectangulaire. Les mesures effectuées dans ces cavités à l'aide d'une théorie perturbative, validées par des résultats de simulation, montrent qu'un champ électrique homogène est obtenu. Les principes retenus pour modifier la géométrie de la cavité rectangulaire seront repris dans les cavités 3D.Les propriétés de trois cavités 3D obtenues en modifiant une cavité parallélépipédique sont étudiées et comparées à celles d'une chambre réverbérante classique munie d'un brasseur de modes. Les modes propres et fréquences de résonance sont déterminés pour ces quatre cavités à l'aide du logiciel HFSS d'Ansoft, tout d'abord en considérant des cavités de géométrie figée, puis en y incluant un brassage mécanique.L'étude de l'homogénéité et de l'isotropie des modes propres montre clairement que les meilleures performances sont obtenues pour une des cavités chaotiques proposées, et ceci quels que soient les critères utilisés.Par ailleurs, il est montré que, dans la chambre réverbérante classique, un grand nombre de modes présente une forte localisation spatiale de l'énergie électrique, alors que ce phénomène ne se produit pas dans la cavité chaotique retenue. Ce phénomène, non détectable par les mesures classiquement effectuées en chambre réverbérante, est dommageable à l'obtention des propriétés d'homogénéité et d'isotropie requises dans le volume de travail.Enfin, l'étude de la distribution des écarts entre fréquences de résonance montre, comme prédit par la Théorie des Matrices Aléatoire, une concordance entre le suivi de la loi asymptotique prévue dans une cavité chaotique et les propriétés d'homogénéité et d'isotropie des champs. Ceci ouvre la voie vers l'utilisation de critères de caractérisation basés sur les fréquences de résonance et non plus uniquement sur les distributions des champs<br>This work deals with the optimization of the geometry of a reverberation chamber, drawing inspiration from the concept of chaotic cavity. Reverberation chambers, widely used for electromagnetic compatibility tests, are used above a minimal frequency from which the fields are statistically isotropic and uniform; however to respect these properties, a mode stirring process is necessary, that can be mechanical or electronic. As, in chaotic cavities, most modes are isotropic and uniform without the help of any stirring process, we take advantage of the knowledge gained from the studies of chaotic cavities to optimize reverberation chamber behavior.We firstly consider 2D chaotic cavities obtained by modifying a rectangular cavity. Measurements besed on a perturbative approch, and validated by simulations, show uniformly distributed electric fields. Similar geometrical modifications are then proposed in 3D.Three 3D different geometries of cavities obtained from a 3D rectangular cavity are then studied, and their properties are compared with those of a classical reverberation chamber equipped witdh a mode stirrer. Eigenmodes and resonant frequencies are determined numerically using Ansoft HFSS software, first by considering fixed cavity geometries, then by moving the stirrer.Electric field uniformity and isotropy are studied using several criteria; all of them clearly show that the best performances are attained within one of the proposed chaotic cavities.Moreover, a strong energy localization effect appears for numerous modes in the classical reverberation chamber, whereas it is not observed in the proposed 3D chaotic cavity. This effect, never reported in reverberation chamber studies, affects the field uniformity and isotropy within the working volume.The cavities properties are also compared width respect to their eigenfrequency spacing distributions. As predicted by the Random matrix Theory, the best agrement width the asymptotic law associated to chaotic cavities corresponds to the best field properties in terms of uniformity and isotropy. It leads to the proposal of reverberation chamber characterization criteria based on resonant frequencies instead of field distributions