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Reescrita de si : a invenção de uma docência em matemáticaAurich, Grace da Ré January 2017 (has links)
Esta tese possui como tema a ética e a diferença na invenção de uma docência matemática em meio à vida, em uma perspectiva pós-estruturalista. Aproxima-se das contribuições teóricas de Deleuze, Foucault e autores afins para pensar a diferença a partir da repetição da escrita de si, tomada enquanto processo inventivo de uma docência. Durante os percursos da pesquisa, utiliza-se dos conceitos de univocidade em Deleuze para tratar da diferença e da ética em Foucault para desestabilizar prescrições das verdades das ciências da educação sobre a docência em matemática. Toma-se uma criação textual de autoria própria - o Vidário de Pendurela - composto por fragmentos escritos de uma docência em meio à vida, que se tornou corpo e produziu matéria de investigação para esta tese, a fim de realizar uma experimentação filosófica pela reescrita de si. O procedimento de pesquisa se deu de modo “amaneirado”, através de um movimento filosófico, uma experimentação de pensamento para pensar a singularidade produzida na escrita e na docência, que consistiu em reescritas de si a partir dos movimentos de recolhimento, colagem, raspagem e criação, ao repetir os escritos de Pendurela, em outro estilo de escrita, diferindo sentidos. Dessa maneira, mostrou-se a invenção de uma docência, utilizando os conceitos de devir, vontade de potência e univocidade para problematizar essa invenção pela reescrita. Ao colocar em funcionamento essa maneira de pesquisar, entendido como repetição da escrita de si, toma-se o mesmo como uma experimentação filosófica para pensar a singularidade produzida na escrita e na docência. / This thesis has as its theme the ethics and the difference in the invention of a mathematical teaching in midst of life, in a poststructuralist perspective. It draws on the theoretical contributions of Deleuze, Foucault and related authors to think about the difference from the repetition of self-writing, taken as an inventive process of teaching. During the course of the research, the concepts of univocity in Deleuze are used to deal with the difference and the ethics in Foucault to destabilize prescriptions of truths of education sciences about teaching mathematics. A textual creation of its own authorship – the Vidário de Pendurela - is taken composed of written fragments of a teaching in the midst of life, which became a structure and produced research material for this thesis in order to conduct a philosophical experimentation by self-rewriting. The research procedure happened in a “certain manner” through a philosophical movement, an experimentation of thinking about the singularity produced in writing and teaching. It consisted of self rewritings from the movements of recollection, collage, scraping and creation, repeating the writings of Pendurela, in another style of writing, differing senses. Thus, the invention of a teaching action is presented, using the concepts of becoming, willpower and univocity to problematize this invention by the rewriting. By putting this manner of searching into practice, recognized as repetition of self-writing, it is possible to understand this process as a philosophical experimentation to think the singularity produced in writing and teaching.
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Gör om, gör rätt: Att göra rewrites på låtar för att stärka demGrubmüller, Katharina January 2017 (has links)
I detta arbete använder jag rewriting som metod för att stärka fyra egenskrivna låtar. Under rewritingsessionerna har jag identifierat problemområden i låtarna och kunnat ersätta detta låtmaterial med nytt material. Det nya materialet är skapat i enighet med erkända låtskrivartekniker och teorier, samt egen personlig preferens. Arbetet resulterade i fyra omskrivna låtar som enligt mig lyckades med sitt syfte om att lyftas. En kortare demoproduktion per låt gjordes sedan för att ge ett utkast till framtida produktion.
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Etude et optimisation de solutions reposant sur les réseaux cellulaires existants pour l'internet des objets / Study and optimisation of solutions based on the current cellular networks for the Internet of thingdDufrene, Louis-Adrien 14 December 2017 (has links)
L'Internet des objets (ldO) connaît un intérêt grandissant depuis plusieurs années, avec la multiplication des objets dits « connectés » et des applications associées. Pour assurer la connectivité de ces objets, des réseaux sans fil longue portée à faible consommation énergétique, dédiés à l'ldO, ont été développés, ces réseaux proposant une connectivité adaptée aux contraintes propres de l'ldO. Plus récemment, le 3GPP a fait évoluer ses technologies 2G et 4G pour pouvoir également fournir des solutions de connectivité adaptées à l'ldO. Pour obtenir l'extension de couverture requise, ces évolutions utilisent entre autres un mécanisme de répétition en aveugle. Dans ce contexte, cette thèse s'intéresse aux mécanismes de recombinaison au sein du récepteur et à l'impact de l'évolution temporelle du canal de propagation et des imperfections du système sur les performances de ces mécanismes, en prenant la technologie 2G comme cas d'application. Tout d'abord, nous nous intéressons aux performances des différents mécanismes dans le cadre d'un récepteur sans imperfection. Puis, nous considérons une synchronisation fréquentielle imparfaite et une estimation de canal imparfaite. Dans ce dernier cas, de nouveaux schémas de recombinaison mixte, alliant deux mécanismes de recombinaison successifs, sont proposés. Enfin, la dernière partie de l'étude consiste en une implémentation du système complet sur des cartes radio-logicielles. Les résultats de cette thèse peuvent être exploités afin d'adapter le schéma de combinaison en fonction de l'application visée, et ainsi de réduire la consommation énergétique du système. / The Internet of Things (loT) is a concept, where a large number of connected devices are communicating together through the same network, constituting an autonomous and intelligent entity. The increasing number of connected devices and IoT services confirms the growing interest for the loT and its applications. To provide connectivity to the devices, several dedicated wireless low power and wide area networks have been created. Recently, with the Release 13, the 3GPP decided to modify the 2G and 4G technologies, to be able to also provide such connectivity for the loT devices, creating the field of Cellular-loT. These evolutions imply a coverage extension compared to the legacy technologies. To obtain this extension, these new standards especially use a blind repetition mechanism. In this context, this thesis studies the performance of several diversity combiners at the receiver, and observes the impact of the temporal evolution of the propagation channel and of imperfections in the receiver. The 2G GSM system is chosen as the application case. Firstly, we consider a receiver without imperfection. Secondly, we consider imperfect frequency synchronization in the receiver. Then, we consider imperfect channel estimation and propose a hybrid combining scheme, obtained by mixing two different combining mechanisms. Finally, in the last part of our study, we carry out a hardware implementation of the system into a software-radio platform. With the theoretical and simulation results provided in this thesis, one can better evaluate the potential of each combining scheme proposed in the framework of loT communications to efficiently benefit from blind repetition mechanisms.
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Spectral analysis of root-mean-square processed surface electromyography data as a measure of repetitive muscular exertionGant, Lauren Christine 01 July 2012 (has links)
Highly repetitive motion is associated with upper extremity musculoskeletal disorders among industrial workers.Current methods of estimating occupational exposure to "repetitiveness" provide information about the repetitiveness of joint motion, but fail to provide complete information about the repetitiveness of muscular exertion, a more biomechanically meaningful measure of repetition. This thesis introduces an innovative digital signal processing method, from which muscular exertion frequency was estimated. Specifically, time series recordings of muscle activity obtained with surface electromyography (sEMG) were processed with standard root-mean-square (RMS) amplitude calculations and then transformed from the time domain into the frequency domain. The mean power frequencies of the RMS-processed sEMG signals (MPF EMG) were then calculated to estimate muscular exertion frequency.
In a laboratory-based validation study involving repetitive isometric hand gripping exertions, MPF EMG was compared to measures of muscular exertion frequency and joint motion frequency across a range of known exertion frequencies, intensities, and durations. Strong linear relationships were observed between MPF EMG and external measures of muscular exertion frequency. However, performance of MPF EMG as a measure of muscular exertion frequency may be improved with an increase of the signal to noise ratio in the sEMG data. Signal processing parameters were therefore investigated. Alternative processing parameters were suggested to minimize difference between MPF EMG and established methods of muscular exertion frequency.
A second laboratory-based validation study compared MPF EMG to a measure of muscular exertion frequency and a measure of joint movement frequency during a simulated industrial task. Although a stronger linear relationship was observed between metrics of joint motion frequency and established measures of muscular exertion, the differences between measures were not meaningful and the relationship between MPF EMG and established measures was moderate-to-strong.
The final phase of this thesis explored the application of the proposed techniques to field-based data collected during a study of ironworkers involved in construction stud-welding tasks. Limitations in data collection limited the analysis of MPF EMG in this study.
The research presented in this thesis introduces a novel metric based on the frequency analysis of RMS processed sEMG data, and presents evidence that MPF EMG has potential to be a valuable assessment technique of exposure to repetitive muscular exertion.
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Age effects on auditory sensory memory: a cognitive neuroscience perspectiveCooper, Rowena January 2009 (has links)
Research Doctorate - Doctor of Philosophy / It is well established that there are changes in cognition and in peripheral sensory mechanisms that occur with age. However, there is much less known about the cause of either change or indeed the relationship between age-related change in sensory processing and age-associated cognitive decline. Understanding these mechanisms could improve our capacity to devise strategies which could assist older adults in aging successfully. In this thesis, I aim to bridge a gap in our knowledge concerning the relationship between age-related change in sensory processing and age-associated cognitive decline by studying the effect of age on what can be considered an intermediary process, sensory memory (in the auditory modality). I continue this line of research by examining the relationship between auditory sensory memory and other types of memory for auditory information in young and older adults. To address these goals, I adopted a cognitive neuroscience approach, relating electrophysiological data to data derived from behavioural memory assessments. In the following thesis, I present a literature review, four studies, and a general discussion of results. Several waveforms of the auditory event-related potential (ERP), including N1, P2, repetition positivity (RP), and mismatch negativity (MMN) were studied. More specifically, in study 1, we looked at the effect of age on N1 and P2 amplitude. In study 2, we examined the conditions eliciting two repetition effects, RP and the MMN memory trace effect, in the auditory ERP of young adults. Studies 3 and 4 concerned the effect of age on RP and the relationship between RP and implicit memory for contextual information as well as explicit memory for auditory information. We concluded that i) age affects auditory sensory memory, ii) the potential relationship between auditory sensory memory and implicit memory for auditory information requires re-investigation, and iii) there is a relationship between auditory sensory memory and explicit memory for auditory information that is altered with age. That is, we concluded that RP occurring in the N1/P2 and MMN latency period indicates memory trace formation and that age affects RP amplitude (restricted to an anterior RP generator). In addition, we showed that RP may be related to implicit memory (priming) in both young and older adults. Across two studies, we found a positive correlation between the response to repetition in the ERP (due to RP activity) and explicit auditory verbal memory in young adults but a negative correlation in older adults. Therefore, although age-related change in RP could reflect the capacity of older adults to encode the context of auditory stimulation, this is potentially due to compensatory activity. We argue it is possible that implicit memory changes with age as a result of age-related change in explicit episodic memory. As a result of well established changes that occur in episodic memory with age, older adults may begin to rely on implicit memory as a source of memory more so than young adults. Our data shows that the implicit memory system may, as a result, favour content over contextual information. An important theme outlined in the discussion of results involves the idea that age-related changes in cognition that are commonly interpreted as cognitive deficits may in fact be beneficial in certain circumstances. We review our results in relation to cognitive theories of aging and find that several theories are applicable to the data, including the frontal hypothesis (incorporating the inhibitory deficit hypothesis), the information degradation hypothesis, and the speed of processing hypothesis. Future research in this area could focus on exploring whether top-down or bottom-up or influences primarily contribute to the age effect on auditory sensory memory and RP, as well as evaluating our hypothesis that the age-related change in RP may be beneficial for explicit item memory but detrimental for implicit contextual memory in older adults (i.e. compensatory mechanisms). While the studies presented in this thesis have provided the foundations guiding our understanding of these issues, researchers in the field of cognitive neuroscience are well equipped to resolve such questions in the future.
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Social promotion and retention policies in Texas elementary schoolsRodriguez, Anissa Jean, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
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La fluidité des génomesCoissac, Eric 18 November 2005 (has links) (PDF)
Depuis le milieu des années 1990 et la publication des deux premiers génomes complètement séquencés (Haemophilus influenzae et Saccharomyces cerevisiae), la biologie a franchi une nouvelle étape. Après la révolution de la biologie moléculaire du début des années 1970 et la vision, que certains qualifient de réductionniste, qu'elle a amenée, l'ère de la génomique fait actuellement évoluer la biologie vers une vision plus intégrative. Ce nouvel engouement pour une biologie dite intégrative a permis de prendre conscience que l'idée selon laquelle l'inventaire complet des gènes d'un organismes permettrait d'appréhender son fonctionnement est une vision simpliste, bien qu'elle ait justifié en grande partie le développement de nombreux "projets génomes".<br /><br />J'ai eu la chance de commencer mes travaux de recherche au début des projets génomes et j'ai, dans ce cadre, participé au projet de séquençage du génome de la levure Saccharomyces cerevisiae. Je ne pourrais dire si c'est en opposition à l'idée du génome vu comme un simple sac à gènes, mais dès ce moment, j'ai orienté mon travail de recherche vers l'étude de l'évolution de la structure des chromosomes de la manière la plus indépendante possible des gènes qu'ils portent. Il m'importe, au travers de mes travaux, d'essayer de mettre en évidence des contraintes évolutive qui sont liées à la nature même du support de l'information génétique et non à l'information portée.<br /><br />La stratégie suivie m'a conduit à étudier les mécanismes de duplication à l'origine de nombreux remaniements chromosomiques. Il m'a été ainsi possible de proposer un modèle expliquant l'origine de nombreuses répétitions observables dans les génomes ainsi que leurs évolutions. Ce modèle semble être applicable, pour ses grandes lignes, aux trois super règnes (Eucaryotae, Eubacteriacae et Archae) ce qui montre le caractère ancestral des mécanismes sous-jacents.<br /><br />Même si l'exercice présente un intérêt, il ne serait sans doute pas raisonnable de poursuivre ce type de travail sans tenter de croiser les résultats ainsi obtenus avec des données relatives à l'information présente sur les chromosomes, et donc à la fonction des gènes codés par ceux-ci. La mise en place du lien entre les données de répétitions dont je dispose et les données fonctionnelles disponibles relève de l'intégration et donc de la représentation des connaissances. MicrOBI peut être considéré comme ma réponse à ce problème. Aujourd'hui cette base de données permet de maintenir cohérents les liens existant entre plusieurs bases de données publiques décrivant différents types d'informations biologiques. L'ajout des données de répétition au schéma actuel permettra de poser au système des requêtes complexes intégrant les différents niveaux de données que sont le génome, le protéome et les classifications fonctionnelles.
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Same same, but different : Repetition i samtal på engelska mellan infödda talare och avancerade inlärareHansson, Karolina January 2006 (has links)
<p>Denna uppsats undersöker, med metoden samtalsanalys, två samtal på engelska mellan infödda talare av engelska och svenskar med engelska som sitt första främmandespråk. Fokus ligger på form och funktion för fenomenet allo-repetition i dessa två samtal, d.v.s. repetition av vad någon annan har sagt tidigare.</p><p>Inom samtalsforskning kring samtal på modersmålet har man funnit att repetitionen har många funktioner på såväl ett innehållsmässigt som ett socialt plan. Genom att använda sig av olika typer av repetitioner förhåller sig samtalaren till både ämnet och de andra samtalarna, samtidigt som koherens skapas. Också inom andraspråksforskningen har repetitionen som fenomen undersökts, och har där funnits anta vissa former beroende på om de används av inlärarna själva eller de mer språkligt kompetenta infödda talarna. I denna studie undersöks avancerade inlärare av engelska, d.v.s. inlärare med en god kunskap om målspråket. Repetitionens roll i dessa samtal granskas i förhållande till såväl repetitionens roll i samtalet på modersmålet som repetitionens roll i andraspråksinlärning.</p><p>I analysen framkom att det främst är de sociala motiven som utgör skäl för repetitionerna, och rollerna som infödd talare respektive inlärare förefaller inte ha någon relevans för användandet av repetitioner. Det förekommer inga direkta bevis för aktiv och medveten inlärning, men däremot kan man anta en potentiell inlärning i ett slags ”biprodukt” av den sociala verksamheten som samtalen utgör, då det t.ex. skapas syntaktiska strukturer, vilka upprepas av de olika deltagarna med mer eller mindre variation. Det kan vidare konstateras att repetitionerna används på ett mycket kontextbundet sätt, och att de två samtalens olika karaktär således delvis ger olika resultat vad beträffar repetitionerna.</p>
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Parents' and educators' perceptions of factors influencing high rate of academic failure of learners in Clarke Estate Primary SchoolsPetersen, Lucille Jacoba January 2010 (has links)
<p>The purpose of this study was to investigate parents&rsquo / and educators&rsquo / perceptions of factors influencing high rate of academic failure of learners in Clarke Estate primary schools. A quantitative, descriptive study design was used in this study. A descriptive study is used to gain information about characteristics within a particular field of study. The instrument used was a research questionnaire as it is a quick and cheap instrument to obtain a lot of information covering a large area within a relatively short time. The study population was confined to two schools in Clarke Estate. The participants were randomly selected. The sample from the two selected schools comprised twenty educators and two hundred parents. The sample was heterogeneous, comprising both male and female.</p>
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Grand Variations for large orchestraZajicek, Daniel 06 September 2012 (has links)
Grand Variations is a work for large orchestra built on an original theme and six variations. My primary concerns when composing were communication, continuity, and distortion. To musically communicate an idea repetition is essential, and the type of repetition presented in theme and variations provided what I was looking for. In addition, the fact that the theme will be repeated over and over leads to a built in continuity. The final concern, distortion, may be achieved by pulling away from a more straightforward presentation of the thematic material.
Two additional elements played a large role in the work—cyclic forms, and quantum physics. The composition Déserts by Edgard Varese, and the jazz work Nefertiti by Wayne Shorter, both contain strong cyclic features. Nefertiti uses the same melody repeated over and over, while Déserts, on the other hand, repeatedly presents the same musical gestures, and sound objects, but with slight changes to achieve its own cyclic sound world. These two works framed the way that I approached variations, yet are at odds with each other. Through my reading of quantum physics, I found a way to join the two into a working structure, and the book, The Grand Design, by Stephen Hawking and Leonard Mlodinow, helped me to do it. Because of this, I decided early on to honor that influence, and the title Grand Variations reflect that.
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