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Carta, Silvio. "Documentary film, observational style and postmodern anthopology in Sardinia : a visual anthropology." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3674/.
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This study explores issues of technique, methodology and style in ethnographic/documentary films, with a focus on Sardinia. How are cultural realities constructed in documentary and ethnographic films? In what ways do practical filmmaking strategies reflect wider epistemological questions and ethical concerns? The thesis examines the general stylistic principles that have guided the making of a substantial body of documentary films about Sardinia. Attention has been paid to a range of different methods used by a select number of documentary and ethnographic filmmakers, covering important theoretical points on the distinctive set of technical, aesthetic and ethical problems embodied in the epistemology of their filmmaking practice. The study concludes that scholars should look for a more balanced fusion between film as a multisensory medium of ideas and forms of ethnographic enquiry conducted through language. The nonverbal elements and visual imagery in ethnographic/documentary films suggest obliquely that a kind of knowledge expressed in the concrete case requires an acknowledgment of domains of experience that often elude written expression.
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Xu, Jiacheng 4159187. "Yi, Observational Documentary Aesthetics, and the Identity Politics of Transcultural Migrancy." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4816.
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There is a moment in Edward Yang’s acclaimed film Yi Yi (2000) in which a young boy in a conversation with his father observes that he cannot see what his father sees and that his father cannot see what he sees, prompting two questions: “How can I know what you see?” and “Can we only know half of the truth?” Unable to provide adequate answers, his father instead offers his son a camera. Later in the film, the same boy presents his uncle with a picture he took of the back of his head. When asked why, the boy responds by saying, “You cannot see it yourself, so I’m helping you.” These two scenes in Yang’s film illustrate the spirit of the questions that guide the aesthetic approach I have taken in my own documentary project. My thesis is composed of two parts: a video project and a research paper, the former of which is a documentary entitled Yi. Named after its primary subject, the film explores the intersections of transnational migrancy and cultural identity through a series of interviews that are intercut with scenes of everyday life that are shot in an observational style. The research paper that follows will situate the project within a specific historical, conceptual, and aesthetic context, before delineating how the cinematic composition of my documentary engages with this framework.
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Sharp, Laura L. "AUDIENCE RESPONSE TO THE NATURE/SOCIETY BINARY IN KUROSAWA’S DERSU UZALA: AN OBSERVATIONAL ONLINE ETHNOGRAPHY." UKnowledge, 2013. http://uknowledge.uky.edu/geography_etds/8.
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Geographers researching cinema have predominantly been interested in how geographic meaning is constructed and negotiated within film, but have been less productive in accounting for how these constructs are received by viewers. Using the method of observational online ethnography, I therefore investigate how fans in online reviews have interpreted the nature/society binary in the film Dersu Uzala. Working from a social constructionist view of nature I begin by deconstructing the binary as it appears in Dersu Uzala before proceeding to illustrate the way this constitutive absence is made up for by the visuality of the film’s landscapes and techniques of geographic realism. Turning to the fan reviews I find that, rather than challenge the historical and constructed division between nature and society, many fans accept the binary as inevitable and consistent with their ideas about contemporary reality. More than passive consumption however, this concurrence is actively rearticulated in the ways that the fans incorporate the binary into their own lives and in the new discursive practices of the internet. In so doing I make headway into the exploration of audience analysis by geographers and continue to advance geography’s foray into cultures of the internet.
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Baker, Jeremy Charles. "Observational Animation: An Exploration of Improvisation, Interactivity and Spontaneity in Animated Filmmaking." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1357315576.
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Duiculescu, Beatrice Ioana. "Can resilient urban design support social resilience?" Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-22719.
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This research is a small part of a bigger field of research made before by other authorsregarding the humans in the urban public space. It has a small context compared to otherstudies, but a big impact inside the community. It aims at finding answers to questions thatother researchers asked before, but under different circumstances and they displayed them through different ways such as documentary films (The social life of small urban spaces 1980, How to live in a city 1964).After experiencing the city life of Malmö and some questions have been raised, the concept of resilience intersected with the interest of social public life in a neighbourhood. In order to have the theoretical framework to answer the research question, the thesis follows a literature review, where the concepts of resilience, urban resilience, resilient urban design and social resilience have been explored.Next, after exploring the city of Malmö, some case studies have been chosen and studiedthrough direct observation in different months starting with March and various times of theday. In the methodological approach section the methods are explained as well as a detailed presentation of the biggest tool used for this research: observational drawing. The tools used for the observation are field notes, observational drawings and photographs. The cases are spread throughout the city and are located in neighbourhoods with different urban tissues. The results reveal all the observational drawings made during the field visits and the field notes written. They show how people use the spaces in all three case studies depending on the weather or other external factors.The discussion reveals the complexity of the relation between concepts and the empiricaldata, following the initial aim of the research throughout the discussion. This thesiscontributes with important outcomes to the field of urban studies creating awareness about the urban context and its influence on people. The findings of this study show a diversity and creativity of users in using the public space.
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Teng, Eric Ju-chung. "First Encounter." Thesis, University of North Texas, 1993. https://digital.library.unt.edu/ark:/67531/metadc501249/.
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The film is about a newly arrived Japanese student's initial period of adjustment at the University of North Texas. This observational documentary film follows the student and witnesses the student's first reactions to various social environments. The purpose of this creative thesis project was to depict the difficulties that international students encounter at the beginning of their stay in America. The initial goal of the video was to provide useful visual research material to people who are interested in the acculturation of foreign students. Because of its realistic character, the video can give its audiences a more immediate and vivid picture of foreign students than existing written literature. By giving an authentic portrait of the students' hardship and adjustments, the ultimate goal of this video was to increase the American people's appreciation of the difficulties encountered by foreign students who come to this country equipped with limited social assistance and resources. An accompanying production report describes the research process, the pre-production, production, and post-production stages.
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Lang, Ian William, and n/a. "Conditional Truths: Remapping Paths To Documentary 'Independence'." Griffith University. Queensland College of Art, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20031112.105737.
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(Synopsis to introductory statement): An introductory statement to five documentary films made by Ian Lang in Australia between 1981 and 1997 exemplifying a 'democratising' model of sustainable and ethical documentary film production. This document critically reflects on the production process of these films to accompany their submission for the degree of Doctor of Philosophy by Publication at Griffith University. It finds that a contemporary tendency towards 'post-industrial' conditions allows an observational film-maker to negotiate a critical inter-dependence rather than a romantically conceived 'independence' traditional to the genre. [Full thesis consists of introductory statement plus six DVD videodiscs.]
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Lang, Ian William. "Conditional Truths: Remapping Paths To Documentary 'Independence'." Thesis, Griffith University, 2003. http://hdl.handle.net/10072/367923.
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(Synopsis to introductory statement): An introductory statement to five documentary films made by Ian Lang in Australia between 1981 and 1997 exemplifying a 'democratising' model of sustainable and ethical documentary film production. This document critically reflects on the production process of these films to accompany their submission for the degree of Doctor of Philosophy by Publication at Griffith University. It finds that a contemporary tendency towards 'post-industrial' conditions allows an observational film-maker to negotiate a critical inter-dependence rather than a romantically conceived 'independence' traditional to the genre. [Full thesis consists of introductory statement plus six DVD videodiscs.]Thesis (PhD Doctorate)
Doctor of Philosophy by Publication (PhD)
Queensland College of Art
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MONTAGNON, FRANCE. "L'osteonecrose aseptique de hanche : au fil et film du temps ; a propos d'une serie de 30 observations." Saint-Etienne, 1993. http://www.theses.fr/1993STET6409.
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Junod-Valera, Tatiana. "Observations pour une rythmique du film : Etude des films "A Falecida (La Décédée)" et "São Bernardo" de Leon Hirszman." Paris 3, 1997. http://www.theses.fr/1997PA030173.
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Cette these est articulee autour de deux axes principaux : une approche theorique sur la notion de rythme et une etude de la structure rythmique de deux films du realisateur bresilien leon hirszman, sao bernardo et a falecida (la decedee). Le premier axe cherche a definir le rythme en general et le rythme du film en particulier, a partir d'un examen des differentes approches qui ont ete consacrees a cette notion. Le deuxieme axe, etudie le systeme rythmique qui preside a l'ordonnancement dynamique des deux films choisis. Il comprend deux parties. Dans la premiere partie les textes filmiques sont situes dans leur champ textuel, par la mise en relation avec leur contexte et par la determination de leurs rapports transtextuels et intertextuels. Dans la seconde, est analyse le role enonciatif des structures rythmiques majeures des deux films. Le but est d'observer la part du rythme dans le fonctionnement metadiscursif du film. Le rythme est utilise comme strategie de communication par le systeme enonciatif du film. Ce cas est specialement present dans sao bernardo, qui a ete concu a priori comme un film d'intervention, au sens donne par christian metz. Il s'agit d'un film capable de subvertir l'instance imaginaire chez le spectateur, pour transmettre des <> caches derriere une trame diegetique fictionalisante. Nous avons voulu reunir dans cette these une reflexionsur le phenomene rythmique dans le champ cinematographique, une approche du fonctionnement des rythmes du film et plus particulierement une appreciation du tissu rythmique de deux films de leon hirszman. Cette etude amorce les premisses d'une analyse plus vaste, qui viserait a deceler les facteurs d'intertextualite rythmique dans une oeuvre. Nous pensons que le rythme, au dela d'etre une manifestation du sujet de l'enonciation, est aussi une trace de l'auteur. C'est un signe stylistique, qui peut apporter de renseignements interessants, a travers une analyse comparative des films constitutifs d'une oeuvre cinematographiqueThis thesis is articulated around two main axis : a theoretical approach of the notion of the rhythm and a study of the rhythmic structures of two films of the brazilian director leon hirszman, sao bernardo and a falecida (the deceased). The first axis aims to define rhythm in a general way and, more particularly, the rhythm of films through the examination of different theoretical approaches of this notion. The second axis, studies the rhythmic system that presides the dynamic organisation of the chosen films. It includes two sections : in the first one, the films are placed in their textual field. This permits the observation of the relations established between the film's texts and its contexts, as well as some of the resulting transtextual and intertextual relations. The second step focuses on the identifying the part taken by the major rhythmic structures in each film. The aim is to observe the role of rhythm in the metadiscursive functioning of the film. The rhythm is used as a communicative strategy in the enunciation system of the film. This is particularly the case of sao bernardo, which has been conceived as an <> in the sense given by christian metz. This means a film able to subvert the spectator's imaginary process, in order to transmit the <> hidden behind the diegetic plot leading to fictionalisation. In this thesis, we wanted to put together a reflection about the rhythmic phenomenon in the cinematographic field, and an approach to the work of the rhythmic structures in a film with a particular observation of the rhythmic weft of our choice of films by leon hirszman. This study sets down the premises for a broader analysis, which should point out the factors of a rhythmic intertextuality in a group of films of one filmmaker. We think that rhythm more than just a manifestation of the subject of the enunciation, is also an author's trail. It is a stylistic sign, that can bring out interesting data through a comparative analysis of the films that constitute an author's work
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Karlsson, Rolf B. (Rolf Boitumelo) 1974. "Piston fuel film observations in an optical access GDI engine." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88868.
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Davies, M. "The observation and interpretation of S.W.R. in thin films." Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374809.
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Iliyas, Abduljelil, Mladen Eić, M. Hassan Zahedi-Niaki, and Sergey Vasenkov. "Towards observation of single-file diffusion using TZLC." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194018.
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Iliyas, Abduljelil, Mladen Eić, M. Hassan Zahedi-Niaki, and Sergey Vasenkov. "Towards observation of single-file diffusion using TZLC." Diffusion fundamentals 6 (2007) 63, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14241.
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Alhazmi, Noura. "Observation of crystal formation of halide perovskite thin film by wide angle X-ray scattering." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/21245/.
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Arnold, C. S. "Magnetic susceptibility observation of a spin-reorientation transition in Fe/2 ML Ni(111)/W(110) films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30067.pdf.
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Boyle, Jonathan William. "Observation of linear and nonlinear magnetostatic waves by Brillouin light scattering." Thesis, University of Salford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262623.
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Huang, Rong, Teruyasu Mizoguchi, Kenji Sugiura, Hiromichi Ohta, Kunihito Koumoto, Tsukasa Hirayama, and Yuichi Ikuhara. "Direct observations of Ca ordering in Ca_0.33CoO_2 thin films with different superstructures." American Institite of Physics, 2008. http://hdl.handle.net/2237/11982.
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Seo, Dongmin. "Alignment of micro-crystals of Mn12-acetate and direct observation of single molecules thereof." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2574.
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Stifter, Jan. "Experimentální studium nestabilit mazacího filmu kluzného ložiska." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382166.
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Presented diploma thesis deals with experimental study of fluid induced instabilities which occur in rotating machinery with journal bearings. The first part describes the oil whirl and oil whip instabilities. It also gives an example of optical methods used for observation of journal bearings. Next part is dedicated to modifications of an existing test rig that were necessary for carrying out experiments. Finally, there are presented results of experiments that define the effect of initial conditions on appearance of instabilities.
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Thiaville, André. "Lignes de Neel dans les films de grenats à anisotropie perpendiculaire : observation et propagation." Paris 11, 1988. http://www.theses.fr/1988PA112262.
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Pour l'étude des lignes de Néel verticales dans les films de grenats ferrimagnétiques à anisotropie perpendiculaire, nous présentons une méthode optique directe d'observation. Nous travaillons en fond noir anisotrope, en lumière polarisée, et la diffraction est causée par la structure de la paroi et de la ligne. De nombreuses photographies illustrent les expériences faites pour vérifier qu'on observe bien des lignes, puis pour les étudier. Nous avons abordé la nucléation des lignes, leur déplacement par champ plan (force directe) et par champ de polarisation pulsé (force gyrotropique), ainsi que la coercivité s'opposant à ces déplacements. Un modèle du contraste des lignes est établi; quelques calculs numériques faits avec ce modèle sont présentés. La mesure des effets magnéto-optiques du premier ordre (effet Faraday) et du deuxième ordre (effet Cotton-Mouton) sur des films minces est discutée. La modulation de polarisation a été employée. Nous utilisons une formulation originale de cette méthode à l'aide de la sphère de Poincaré (représentation géométrique) dans la discussion.
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Thiaville, André. "Lignes de Neel dans les films de grenats à anisotropie perpendiculaire observation et propagation /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37618866n.
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Jimenez, Nicholas M. "Implementation of Magneto Optical Kerr Effect Microscopy for the Observation of Magnetic Domain Structure in Thin Films." Thesis, California State University, Long Beach, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13425872.
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The home built Magneto-Optical Kerr Effect (MOKE) microscope was implemented to probe the magnetic domain patterns of thin film samples. A CCD camera is introduced to the existing MOKE rotation measurement setup. The images captured by the camera are used to analyze the change in the magnetic domain patterns by the Kerr effect. Using 6.5× zoom lens and 1.33× extension tube attached to the CCD camera, the size of the sample down to a 1.02mm by 0.75 mm area can be viewed in the image capture. Magnetic hysteresis loop is first measured to investigate the magnetic switching behavior and measure the coercivity. Domain images that exhibited the most significant change were mostly captured between magnetic remanence and near coercivity. The images of samarium cobalt thin film at or near magnetic coercivity showed the changes in shape and light intensity of the magnetic domain light patterns due to the Kerr rotation.
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Barre, Cyril. "Jet en écoulement transversal : observations expérimentales et numériques." Nancy 1, 1998. http://www.theses.fr/1998NAN10277.
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Un jet de fluide soumis à un écoulement transversal génère une dynamique très complexe, dont la description et la prédiction constituent un enjeu tant fondamental qu'industriel. L’étude s'appuie sur une corrélation étroite entre l'approche expérimentale et la simulation numérique de l'écoulement. La configuration étudiée concerne une buse de section rectangulaire ayant un rapport d'aspect de 2. L’écoulement transverse et celui du jet sont turbulents. Les rapports de vitesses Uj/Ut sont compris entre 3 et 6. L’expérimentation est successivement conduite en canal à eau et en souffleries. Les résultats proviennent de l'analyse des visualisations ainsi que de l'exploitation des mesures du champ instantané de vitesse et de température par vélocimétrie à 2 fils chauds croisés et fil froid et par vélocimétrie laser à effet doppler. Les mesures sont pour l'essentiel réalisées dans le plan médian du jet. La notion de ligne centrale du jet est d'abord définie et quantifiée. Ensuite une approche métrologique originale permet de mesurer les grandeurs moyennes et leurs fluctuations dans un repère de Frénet porte par les lignes de courant. L’analyse statistique des fluctuations permet la détermination des échelles de turbulence, des flux turbulents et du nombre de Prandtl associé. L’analyse fréquentielle des données montre le caractère fortement instationnaire de l'écoulement. Une fréquence caractéristique émerge nettement des que la vitesse du jet est suffisante. Elle correspond à un nombre de Strouhal de 0. 1. La simulation numérique en volumes finis est menée selon une approche stationnaire puis instationnaire. La solution stationnaire ne converge pas vers la moyenne des solutions instationnaires qui se révèle seule en très bonne concordance avec l'expérience, tant sur les valeurs moyennes que sur la prédiction des structures spatio-temporelles. L’émission par une buse rectangulaire ne modifie pas qualitativement l'organisation spatiale et temporelle de l'écoulement observé en buse circulaire. En revanche, la synthèse de nos résultats permet d'une part de préciser quantitativement les champs de vitesse et de température dans la configuration étudiée et d'autre part, de compléter la description habituellement admise de l'évolution temporelle des deux vortex contrarotatifs marquant le développement du jet.
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Rapoport, Robert S. "The iterative frame : algorithmic video editing, participant observation & the black box." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:8339bcb5-79f2-44d1-b78d-7bd28aa1956e.
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Machine learning is increasingly involved in both our production and consumption of video. One symptom of this is the appearance of automated video editing applications. As this technology spreads rapidly to consumers, the need for substantive research about its social impact grows. To this end, this project maintains a focus on video editing as a microcosm of larger shifts in cultural objects co-authored by artificial intelligence. The window in which this research occurred (2010-2015) saw machine learning move increasingly into the public eye, and with it ethical concerns. What follows is, on the most abstract level, a discussion of why these ethical concerns are particularly urgent in the realm of the moving image. Algorithmic editing consists of software instructions to automate the creation of timelines of moving images. The criteria that this software uses to query a database is variable. Algorithmic authorship already exists in other media, but I will argue that the moving image is a separate case insofar as the raw material of text and music software can develop on its own. The performance of a trained actor can still not be generated by software. Thus, my focus is on the relationship between live embodied performance, and the subsequent algorithmic editing of that footage. This is a process that can employ other software like computer vision (to analyze the content of video) and predictive analytics (to guess what kind of automated film to make for a given user). How is performance altered when it has to communicate to human and non-human alike? The ritual of the iterative frame gives literal form to something that throughout human history has been a projection: the omniscient participant observer, more commonly known as the Divine. We experience black boxed software (AI's, specifically neural networks, which are intrinsically opaque) as functionally omniscient and tacitly allow it to edit more and more of life (e.g. filtering articles, playlists and even potential spouses). As long as it remains disembodied, we will continue to project the Divine on to the black box, causing cultural anxiety. In other words, predictive analytics alienate us from the source code of our cultural texts. The iterative frame then is a space in which these forces can be inscribed on the body, and hence narrated. The algorithmic editing of content is already taken for granted. The editing of moving images, in contrast, still requires a human hand. We need to understand the social power of moving image editing before it is delegated to automation. Practice Section: This project is practice-led, meaning that the portfolio of work was produced as it was being theorized. To underscore this, the portfolio comes at the end of the document. Video editors use artificial intelligence (AI) in a number of different applications, from deciding the sequencing of timelines to using facial and language detection to find actors in archives. This changes traditional production workflows on a number of levels. How can the single decision cut a between two frames of video speak to the larger epistemological shifts brought on by predictive analytics and Big Data (upon which they rely)? When predictive analytics begin modeling the world of moving images, how will our own understanding of the world change? In the practice-based section of this thesis, I explore how these shifts will change the way in which actors might approach performance. What does a gesture mean to AI and how will the editor decontextualize it? The set of a video shoot that will employ an element of AI in editing represents a move towards ritualization of production, summarized in the term the 'iterative frame'. The portfolio contains eight works that treat the set was taken as a microcosm of larger shifts in the production of culture. There is, I argue, metaphorical significance in the changing understanding of terms like 'continuity' and 'sync' on the AI-watched set. Theory Section In the theoretical section, the approach is broadly comparative. I contextualize the current dynamic by looking at previous shifts in technology that changed the relationship between production and post-production, notably the lightweight recording technology of the 1960s. This section also draws on debates in ethnographic filmmaking about the matching of film and ritual. In this body of literature, there is a focus on how participant observation can be formalized in film. Triangulating between event, participant observer and edit grammar in ethnographic filmmaking provides a useful analogy in understanding how AI as film editor might function in relation to contemporary production. Rituals occur in a frame that is dependent on a spatially/temporally separate observer. This dynamic also exists on sets bound for post-production involving AI, The convergence of film grammar and ritual grammar occurred in the 1960s under the banner of cinéma vérité in which the relationship between participant observer/ethnographer and the subject became most transparent. In Rouch and Morin's Chronicle of a Summer (1961), reflexivity became ritualized in the form of on-screen feedback sessions. The edit became transparent-the black box of cinema disappeared. Today as artificial intelligence enters the film production process this relationship begins to reverse-feedback, while it exists, becomes less transparent. The weight of the feedback ritual gets gradually shifted from presence and production to montage and post-production. Put differently, in cinéma vérité, the participant observer was most present in the frame. As participant observation gradually becomes shared with code it becomes more difficult to give it an embodied representation and thus its presence is felt more in the edit of the film. The relationship between the ritual actor and the participant observer (the algorithm) is completely mediated by the edit, a reassertion of the black box, where once it had been transparent. The crucible for looking at the relationship between algorithmic editing, participant observation and the black box is the subject in trance. In ritual trance the individual is subsumed by collective codes. Long before the advent of automated editing trance was an epistemological problem posed to film editing. In the iterative frame, for the first time, film grammar can echo ritual grammar and indeed become continuous with it. This occurs through removing the act of cutting from the causal world, and projecting this logic of post-production onto performance. Why does this occur? Ritual and specifically ritual trance is the moment when a culture gives embodied form to what it could not otherwise articulate. The trance of predictive analytics-the AI that increasingly choreographs our relationship to information-is the ineffable that finds form in the iterative frame. In the iterative frame a gesture never exists in a single instance, but in a potential state. The performers in this frame begin to understand themselves in terms of how automated indexing processes reconfigure their performance. To the extent that gestures are complicit with this mode of databasing they can be seen as votive toward the algorithmic. The practice section focuses on the poetics of this position. Chapter One focuses on cinéma vérité as a moment in which the relationship between production and post-production shifted as a function of more agile recording technology, allowing the participant observer to enter the frame. This shift becomes a lens to look at changes that AI might bring. Chapter Two treats the work of Pierre Huyghe as a 'liminal phase' in which a new relationship between production and post-production is explored. Finally, Chapter Three looks at a film in which actors perform with awareness that footage will be processed by an algorithmic edit.The conclusion looks at the implications this way of relating to AI-especially commercial AI-through embodied performance could foster a more critical relationship to the proliferating black-boxed modes of production.
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George, Matthieu. "Endommagement de films minces sur substrats sous contraintes : observations in situ par AFM et analyse par éléments finis." Poitiers, 2003. http://www.theses.fr/2003POIT2273.
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Le couplage d'un microscope à force atomique avec une machine de déformation uniaxiale, nous a permis d'observer in situ l'endommagement de films minces métalliques sur substrats polymère. Pour des films en compression, nous avons étudié la stabilité des différentes structures de flambage observées (rides rectilignes, cordons de téléphone ou chapelets de bulles) en fonction de l'état de contraintes dans le film. La répartition des contraintes au sein d'une cloque a été également analysée par micro-diffraction des rayons X et calculs par éléments finis. Les étapes successives de la fissuration d'un matériau revêtu soumis à une traction uniaxiale ont été déterminées et analysées une à unes à l'aide des éléments finis. La fissuration du substrat polymère induite par la fissuration du film métallique a été mise en évidence. Il a été aussi montré que l'assistance ionique, en améliorant l'adhésion film/substrat, facilitait la propagation des fissures au sein du matériau revêtuTo observe in situ the damaging of metallic thin films on polymeric substrates, an atomic force microscope have been interfaced with an uniaxial mechanical testing machine. For films under compressive stresses, stability of the different observed buckled structures (straight-sided blisters, wormlike or varicose pattern) have been studied as a function of the stresses in the film. Distribution of the stresses in a blister has also been analysed by X-ray micro-diffraction and finite elements calculations. Successive cracking mecanism of a coated material under increasing tensile stresses have been characterized and analysed with the help of finite elements. Cracking of the polymeric substrate induced by the cracking of the metallic film has been underlined. The effect of ion beam assistance has been studied : the improvement of the film/substrate adhesion is accompanied by the weakening of the resistance to cracking of the coated material
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Ma, Jiayang. "Selective Observations of Chemical Structures of Heat-treated Poly(acrylonitrile) Films at The Surface and Core Regions by Solid-state NMR." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555600643937118.
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Bailey, Rachael Decker. ""The finest entertainment" : conscious observation on film in adaptations of Henry James' The portrait of a lady, The wings of the dove, and Washington Square /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1202.pdf.
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Zhang, Chao. "Caractérisation des performances limites des jeux non-coopératifs avec observation imparfaite : application à la téléphonie mobile 5G." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS570/document.
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Une grande partie des résultats rapportés dans cette thèse est basée sur une observation qui n'a jamais été faite pour les communications sans fil et le contrôle de puissance en particulier: les niveaux de puissance d'émission et plus généralement les matrices de covariance peuvent être exploitées pour intégrer des informations de coordination. Les échantillons de rétroaction dépendants des interférences peuvent être exploités comme canal de communication. Premièrement, nous montrons que le fameux algorithme itératif de remplissage d'eau n'exploite pas suffisamment l'information disponible en termes d'utilité-somme. En effet, nous montrons que l'information globale d'état de canal peut être acquise à partir de la seule connaissance d'une rétroaction de type SINR. Une question naturelle se pose alors. Est-il possible de concevoir un algorithme de contrôle de puissance distribué qui exploite au mieux les informations disponibles? Pour répondre à cette question, nous dérivons la caractérisation de la région d'utilité pour le problème considéré et montrons comment exploiter cette caractérisation non seulement pour mesurer globalement l'efficacité mais aussi pour obtenir des fonctions de contrôle de puissance à un coup efficaces au niveau global. Motivés par le succès de notre approche sur les réseaux d'interférences mono bande et multibande, nous nous sommes demandé si elle pourrait être exploitée pour les réseaux MIMO. Nous avons identifié au moins un scénario très pertinent. En effet, nous montrons que l'alignement d'interférence opportuniste peut être implémenté en supposant seulement une rétroaction de covariance d'interférence plus bruit à l'émetteur secondaire. Puis, dans le dernier chapitre, nous généralisons le problème de la quantification, la motivation étant donnée par certaines observations faites dans les chapitres précédents. Premièrement, nous supposons que le quantificateur et le déquantificateur sont conçus pour maximiser une fonction d'utilité générale au lieu de la fonction de distorsion classique. Deuxièmement, nous supposons que le quantificateur et le déquantificateur peuvent avoir des fonctions d'utilité différentes. Cela soulève des problèmes techniques non triviaux, notre revendication est de faire un premier pas dans la résolution d'euxA large part of the results reported in this thesis is based on an observation which has never been made for wireless communications and power control in particular: transmit power levels and more generally transmit covariance matrices can be exploited to embed information such as coordination information and available interference-dependent feedback samples can be exploited as a communication channel. First, we show that the famous iterative water-filling algorithm does not exploit the available information sufficiently well in terms of sum-utility. Indeed, we show that global channel state information can be acquired from the sole knowledge of an SINR-type feedback. A natural question then arises. Is it possible to design a distributed power control algorithm which exploits as well as possible the available information? To answer this question, we derive the characterization of the utility region for the considered problem and show how to exploit this characterization not only to measure globally efficiency but also to obtain globally efficient one-shot power control functions. Motivated by the success of our approach for single-band and multi-band interference networks, we asked ourselves whether it could be exploited for MIMO networks. We have identified at least one very relevant scenario. Indeed, we show that opportunistic interference alignment can be implemented by only assuming interference-plus-noise covariance feedback at the secondary transmitter. Then, in the last chapter, we generalize the problem of quantization, the motivation for this being given by some observations made in the previous chapters. First, we assume that the quantizer and de-quantizer are designed to maximize a general utility function instead of the conventional distortion function. Second, we assume that the quantizer and de-quantizer may have different utility functions. This raises non-trivial technical problems, our claim is to make a very first step into solving them
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Kouts, Aurite. "Silence on tourne! Incidences des interactions entre acteurs dans le cadre d'un processus creatif." Thesis, Paris, EHESS, 2019. http://www.theses.fr/2019EHES0032.
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La présente thèse se propose d’étudier les ressorts d’un tournage d’un long métrage de fiction sous l’angle des interactions de ses participants dans un contexte particulier : celui du cinéma israélien. Ma thèse s’inscrit dans la continuité des travaux des sociologues de l’école interactionniste au sens large tels que Howard S. Becker ou Erving Goffman Elle se base sur une enquête de terrain de plusieurs mois en observation participante d’un tournage d’un long métrage de fiction israélien contemporain tourné majoritairement à Jérusalem et une trentaine d’entretiens qui apportent un éclairage inédit sur la manière de faire des films dans le pays.Le tournage est une étape d’action collective intense où différents agents interagissent ensemble dans un processus de création. Il est donc le centre d’interactions sociales riches et particulières dont l’analyse permet de mettre à jour leur influence sur la fabrication du film. La thèse montre également les spécificités d’un tournage d’un long métrage de fiction dans une ville, Jérusalem, où la religion et le contexte géopolitique altèrent l’organisation codifiée du plateauThis thesis studies the nuts and bolts of the filming of a feature film through the interactions of the people working on the set in the particular context of Israeli cinema. My thesis follows the works of sociologists of the broader interactionist school of thought such as Howard Becker or Erving Goffman. The thesis is based on several months of fieldwork as a participant observer on the film set of a contemporary Israeli feature film filmed mostly in Jerusalem as well as thirty interviews which bring an unprecedented overview of the way films are made in the country. Principal photography is the stage of intense collective action during which different agents interact together in a creative process. Thus, the film set is at the center of rich and particular social interactions. By analyzing those interactions, one can uncover their influence on the making of the film. The thesis also demonstrates the peculiarities of filming a feature film in a city, Jerusalem, where religion and the geopolitical context affect the codified organization of the film set
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Aljewifi, Hana. "Etude du comportement mécanique à l’arrachement de fils multi-filamentaires enrobés dans une matrice cimentaire et influence de l’imprégnation." Thesis, Cergy-Pontoise, 2011. http://www.theses.fr/2011CERG0551/document.
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Cette recherche porte sur les fils multifilamentaires de verre utilisés pour renforcer les matériaux à base de ciment. Elle est focalisée sur les interactions mécaniques de ce type de fils, constitués d'un assemblage de milliers de filaments micrométriques, avec un micro-béton et sur le rôle spécifique de l'imprégnation du fil par cette matrice cimentaire. Trois pré-conditionnements des fils ont été employés lors de la fabrication des éprouvettes afin de moduler les conditions d'imprégnation par la matrice cimentaire. L'imprégnation de 5 fils multi-filamentaires par la matrice cimentaire a été caractérisée et les paramètres d'imprégnation ont été définis en s'appuyant sur des observations MEB, ainsi que des essais de porosimétrie au mercure et des essais spécifiques d'écoulement le long du fil enrobé. Des essais classiques d'arrachement de type pull-out ont été utilisés pour la caractérisation mécanique. L'analyse des liens entre les propriétés mécaniques et les paramètres d'imprégnation ont permis de mieux comprendre les micro-mécanismes d'interaction filaments / matrice cimentaire et d'expliquer le comportement macroscopique à l'arrachementThis research deals with multi-filaments glass yarns used as reinforcement of cement based materials. It focuses on the mechanical interactions of these yarns, made of thousands of micrometric filaments, with a micro-concrete and on the specific part of the impregnation of the yarn by the cementitious matrix. Modulated impregnation conditions of the yarns were obtained by using three different manufacturing processes for the samples preparation. The impregnation of 5 multi-filament yarns by the cementitious matrix has been characterized and physical parameters of impregnation were determined using SEM investigations, mercury intrusion porosity measurements and specific tests of flow all along the embedded yarn. Classical pull-out tests have been used for the mechanical characterisation. The study of the links between the mechanical properties and the physical parameters of impregnation allowed accessing a better understanding of the filaments / cementitious matrix interaction micro-mechanisms, and explaining the macroscopic pull-out behaviour
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Steffen, Alexandra Verfasser], Thomas [Akademischer Betreuer] Brückel, and Joachim [Akademischer Betreuer] [Mayer. "Self-purifying La2/3Sr1/3MnO3 epitaxial films : observation of surface precipitation of Mn3O4 particles for excess Mn ratios / Alexandra Steffen ; Thomas Brückel, Joachim Mayer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/1130590305/34.
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Steffen, Alexandra [Verfasser], Thomas Akademischer Betreuer] Brückel, and Joachim [Akademischer Betreuer] [Mayer. "Self-purifying La2/3Sr1/3MnO3 epitaxial films : observation of surface precipitation of Mn3O4 particles for excess Mn ratios / Alexandra Steffen ; Thomas Brückel, Joachim Mayer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://nbn-resolving.de/urn:nbn:de:hbz:82-rwth-2016-049313.
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Berger, Nicole. "La lithiase de la voie biliaire principale sur fil de suture non resorbable apres cholecystectomie : a propos d'une observation et d'une revue de la litterature." Lyon 1, 1992. http://www.theses.fr/1992LYO1M275.
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Quintanar, Guzmán Serket. "Nonlinear observation and control of a lightweight robotic manipulator actuated by shape memory alloy (SMA) wires." Thesis, Université de Lorraine, 2019. http://www.theses.fr/2019LORR0050/document.
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Au cours de la dernière décennie, l’industrie des véhicules aériens sans pilote (UAV) a connu une croissance et une diversification immenses. De nos jours, nous trouvons des applications basées sur les drones dans un large éventail d’industries, telles que les infrastructures, l’agriculture, les transports, etc. Ce phénomène a suscité un intérêt croissant dans le domaine de la manipulation aérienne. La mise en œuvre de manipulateurs aériens dans l'industrie des UAV pourrait générer une augmentation significative du nombre d'applications possibles. Cependant, la restriction de la charge utile disponible est l’un des principaux inconvénients de cette approche. L'impossibilité d'équiper les drones de bras robotiques industriels puissants et habiles a suscité l'intérêt pour le développement de manipulateurs légers adaptés à ces applications. Dans le but de fournir une solution légère alternative aux manipulateurs aériens, cette thèse propose un bras robotique léger actionné par des fils en alliage à mémoire de forme (SMA). Bien que les fils SMA représentent une excellente alternative aux actionneurs conventionnels pour les applications légères, ils impliquent également une dynamique hautement non linéaire, ce qui les rend difficiles à contrôler. Cherchant à présenter une solution pour la tâche difficile de contrôler les fils SMA, ce travail étudie les conséquences et les avantages de la mise en œuvre des techniques de commande par retour d’état. L'objectif final de cette étude est la mise en œuvre expérimentale d'un contrôle à rétroaction d'état pour la régulation de la position du bras robotique léger proposé. Tout d'abord, un modèle mathématique basé sur un modèle physique du comportement des câbles SMA est développé et validé expérimentalement. Ce modèle décrit la dynamique du bras robotique léger proposé du point de vue de la mécatronique. Le bras robotique proposé est testé avec trois contrôleurs de retour de sortie pour le contrôle de position angulaire, à savoir un PID, un mode coulissant et une commande adaptative. Les contrôleurs sont testés dans une simulation MATLAB, puis mis en œuvre et testés expérimentalement selon différents scénarios. Ensuite, afin de réaliser la mise en œuvre expérimentale d’une technique de commande par retour d’état, un observateur d’état, à entrée inconnue, est développé. Premièrement, un modèle observable sans commutation avec une entrée inconnue est dérivé du modèle présenté précédemment. Ce modèle prend comme entrée inconnue le taux de fraction de martensite du modèle d'origine, ce qui permet d'éliminer les termes de commutation dans le modèle. Ensuite, un observateur, à entrées inconnues, basé sur le filtre de Kalman étendu et sur l’observateur à mode glissant est développé. Cet observateur permet l’estimation simultanée de l’état et des entrées inconnues. Les conditions suffisantes de convergence et de stabilité sont établies. L'observateur est testé dans une simulation MATLAB et validé expérimentalement dans différents scénarios. Enfin, une technique de commande par retour d’état est testée en simulation et implémentée de manière expérimentale pour le contrôle de position angulaire du bras robotique léger proposé. Elle est basée sur la résolution d’une équation de Riccati (SDRE). En conclusion, une analyse comparative quantitative et qualitative entre une approche de commande par retour de sortie et la une de commande par retour d’état mis en œuvre est effectuée selon plusieurs scénarios, y compris la régulation de position, le suivi de position et le suivi de charges utiles changeantesIn the last decade, the industry of Unmanned Aerial Vehicles (UAV) has gone through immense growth and diversification. Nowadays, we find drone based applications in a wide range of industries, such as infrastructure, agriculture, transport, among others. This phenomenon has generated an increasing interest in the field of aerial manipulation. The implementation of aerial manipulators in the UAV industry could generate a significant increase in possible applications. However, the restriction on available payload is one of the main setbacks of this approach. The impossibility to equip UAVs with heavy dexterous industrial robotic arms has driven the interest in the development of lightweight manipulators suitable for these applications. In the pursuit of providing an alternative lightweight solution for the aerial manipulators, this thesis proposes a lightweight robotic arm actuated by Shape Memory Alloy (SMA) wires. Although SMA wires represent a great alternative to conventional actuators for lightweight applications, they also imply highly nonlinear dynamics, which makes them difficult to control. Seeking to present a solution for the challenging task of controlling SMA wires, this work investigates the implications and advantages of the implementation of state feedback control techniques. The final aim of this study is the experimental implementation of a state feedback control for position regulation of the proposed lightweight robotic arm. Firstly, a mathematical model based on a constitutive model of the SMA wire is developed and experimentally validated. This model describes the dynamics of the proposed lightweight robotic arm from a mechatronics perspective. The proposed robotic arm is tested with three output feedback controllers for angular position control, namely a PID, a Sliding Mode and an Adaptive Controller. The controllers are tested in a MATLAB simulation and finally implemented and experimentally tested in various different scenarios. Following, in order to perform the experimental implementation of a state feedback control technique, a state and unknown input observer is developed. First, a non-switching observable model with unknown input of the proposed robotic arm is derived from the model previously presented. This model takes the martensite fraction rate of the original model as an unknown input, making it possible to eliminate the switching terms in the model. Then, a state and unknown input observer is proposed. This observer is based on the Extended Kalman Filter (EKF) for state estimation and sliding mode approach for unknown input estimation. Sufficient conditions for stability and convergence are established. The observer is tested in a MATLAB simulation and experimentally validated in various different scenarios. Finally, a state feedback control technique is tested in simulation and experimentally implemented for angular position control of the proposed lightweight robotic arm. Specifically, continuous and discrete-time State-Dependent Riccati Equation (SDRE) control laws are derived and implemented. To conclude, a quantitative and qualitative comparative analysis between an output feedback control approach and the implemented state feedback control is carried out under multiple scenarios, including position regulation, position tracking and tracking with changing payloads
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LO, DICO GIUSEPPE. "MENTALISMO VS. ANTI-MENTALISMO. UN'ANALISI EPISTEMOLOGICA E UNA RICERCA EMPIRICA." Doctoral thesis, Università Cattolica del Sacro Cuore, 2009. http://hdl.handle.net/10280/483.
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Per spiegare i loro risultati gli psicologi sperimentali fanno uso di termini riferentisi al mentale. Tuttavia, nel corso della storia, essi hanno definito in modi differenti il concetto di mente e quindi il significato dei termini usati nelle sue teorie. Nella prima parte della tesi sono discusse quattro opzioni epistemologiche in base alle quali tali termini sono stati interpretati nella storia della psicologia scientifica (il ‘mentalismo’ dell’introspezionismo, l’‘anti-mentalismo’ del comportamentismo, il ‘mentalismo’ del cognitivismo, l’ ‘antimentalismo’ delle neuroscienze cognitive). Assumere una di queste posizioni piuttosto che un’altra implica il porre l’attenzione su tipi diversi di dati e dunque la scelta di differenti metodologie di raccolta e analisi degli stessi.
Nella seconda parte vengono replicati gli esperimenti del neurologo Damasio per testare la sua “ipotesi del marcatore somatico”. Tali esperimenti sono interessanti perchè utilizzano dati e metodologie che fanno riferimento a tutte e quattro le opzioni epistemologiche descritte nella prima parte. I risultati qui presentati non replicano quelli di Damasio e dunque sembrano falsificare la sua ipotesi.
L’analisi empirica e quella epistemologica mostrano come l’opzione mentalistico-introspezionistica (rifiutatata da Damasio in favore di quella neuroscientifica) meriti di essere considerata e perseguita come linea metodologica che può dare origine a risultati scientificamente fecondi.Experimental psychologists use terms referring to mind for explaining their results. However, in the course of history, they have defined the concept of mind in many ways and so the meaning of the terms used in its theories. In the first part of this work four epistemological options according to which these terms have been interpreted all along the history of experimental psychology are discussed (the ‘mentalism’ of introspectionism, the ‘anti-mentalism’ of behaviourism, the ‘mentalism’ of cognitivism, the ‘anti-mentalism’ of cognitive neuroscience). Assuming one of these options implies to consider different kinds of data and so to choose different data collecting and analyzing methodologies. In the second part the experiments proposed by neurologist Damasio for testing his ‘somatic marker hypothesis’ are replicated. Such experiments are interesting because they appeal to data and methodologies referring to all the four epistemological options above considered. The results presented do not replicate the Damasio’s ones and so they seem to falsify his hypothesis. The epistemological analysis and the empirical research show how the introspectionistic-mentalistic option (refused by Damasio in favour of the neuroscientific option) deserve to be considered as a reliable methodological that can lead to important scientific results.
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Butcher, Erica. "An Audience Reception Analysis Field Study: Exploring Second and Later Generation Latino Viewers’ Perceived Realism Appraisals of Latino Fictional Television Characters in English Language Television Programs." Ohio : Ohio University, 2009. http://www.ohiolink.edu/etd/view.cgi?ohiou1249586967.
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Séméria, Marie-Noëlle. "Etude de circuits submicroniques implantés pour mémoire à bulles magnétiques." Grenoble 1, 1987. http://www.theses.fr/1987GRE10137.
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La technologie necessaire a la realisation de memoires a bulles magnetiques implantees de haute densite (au moins 16 mb/cm**(2)) est etudiee sous differents aspects: le report de motifs submicroniques (0. 3-0. 8 mu m) necessite d'optimiser les moyens classiques de lithographie optique par contact ou projection. A cette fin, une modelisation est utilisee et des experiences comparatives realisees; la realisation des circuits comporte des implantations ioniques: differents materiaux de masque sont proposes (or, silice, polymere). Dans chacun des cas, des realisations concretes de masques graves sont effectuees et analysees; enfin des implantations hydrogene sont realisees. Le fonctionnement des dispositifs est correle aux parametres de l'implantation et au dessin des motifs. Des conclusions pratiques sont tirees sur l'implantation et la technologie compatibles avec un bon fonctionnement des dispositifs
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Noordhuis-Fairfax, Sarina. "Field | Guide: John Berger and the diagrammatic exploration of place." Phd thesis, Canberra, ACT : The Australian National University, 2018. http://hdl.handle.net/1885/154278.
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Positioned between writing and drawing, the diagram is proposed by John Berger as an alternative strategy for articulating encounters with landscape. A diagrammatic approach offers a schematic vocabulary that can compress time and offer a spatial reading of information. Situated within the contemporary field of direct data visualisation, my practice-led research interprets Berger’s ‘Field’ essay as a guide to producing four field | studies within a suburban park in Canberra. My seasonal investigations demonstrate how applying the conventions of the pictorial list, dot-distribution map, routing diagram and colour-wheel reveals subtle ecological and biographical narratives.
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Key, Liza Jane. "'Victims of foolish pleasure': film, ethnography, and coloured women making music in the Great Karoo." Thesis, 2011. http://hdl.handle.net/10539/10137.
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MA, School of Music, Faculty of Humanities, University of the WitwatersrandIn 2003 I made a documentary film called Karoo Kitaar Blues with South African songwriter and guitarist, David Kramer, on the rare musicians, music, and instruments of scattered coloured communities in the Northern Cape. When I set out, seven years ago, to make the film I had no intention of making an ethnographic film or producing a visual ethnography in the anthropological sense (I am a documentary filmmaker), but two academic reviews, critical of its lack of ‘ethnographic context’ caught my intention. This dissertation attempts to respond to their critique. I explore the territory of visual anthropology and ethnographic methodology in order to understand why my film, with hindsight, is and is not ‘ethnographic’, and to establish how ethnographic practice could enhance my work as a filmmaker. I use Karoo Kitaar Blues as my visual monograph and examine the differences between ethnographic film and documentary (in the observational mode) with reference to ethnographic methodologies and theory in ethnomusicology, and consider how film can be used ‘as’ ethnography or ‘in’ ethnography. I conclude that Karoo Kitaar Blues film lies somewhere between ethnographic and observational filmmaking.
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Palangi, Amin. "Waking with Martyrs: An exegesis towards understanding & situating the filmmaker in a dramatically structured documentary." Phd thesis, 2014. http://hdl.handle.net/1885/11791.
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This exegesis offers an understanding of the practical PhD which led to the creation
of the feature documentary film Waking with Martyrs, a film which follows an
Iranian-Australian filmmaker’s journey into war sites of Iran. On the one hand, this
study situates the personal, social, political and historical context which led to the construction of the journey and the film. While it examines the personal reasons for which the filmmaker embarked on the journey, it situates Iranian war sites as new
sites of pilgrimages and highlights its political and social significance in Iran. It
highlights the importance of these war pilgrimages within a religious and political
landscape, not only arguing for their political importance in Iran, but also for their significance in defining parts of Iranian identity. The study examines how the
journey offers insight into one of Iran’s least understood pro-government groups who
embark on such kinds of journeys. It further examines the way the film could be seen
as an agent of shifting perspectives and changes, not only for the filmmaker, but also
for the subjects in the film, and the viewing audiences. On the other hand, this study situates the film through theories of documentary, examining in detail the processes, which led to the particular creation of the film. It examines the film within the larger scope of diasporic Iranian filmic landscape about the war and argues how this film could be seen as contributing to a new understanding of the situation within Iran.
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Lee, Yun-ping, and 李芸萍. "An Observation on Taiwan Independent Film Production──A Case Study of HMC Film Productions." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/08057077932501480217.
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Wu, Mong-Yi, and 吳孟怡. "Magnetic domain observation and magnetoresistance properties of Permalloy films." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/71553290125484079058.
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碩士國立臺灣海洋大學
光電科學研究所
93
Abstract Magnetoresistance of ferromagnetic samples varies when the intensity or direction of an external magnetic field is changed. The main ferromagnetic materials are CoNi and FeNi alloys, and they are widely uesd in magnetic sensor applications. In this thesis we focused on the FeNi alloy, and used thermal evaporation method to manufacture a series of thin film samples of Fe20Ni80 alloy. Next, we analyzed various properties of this thin film sample. From the magneto-electrical resistivity experiment, we found that the magnetoresistance and planar Hall-effect properties are functions of the external magnetic DC field. By applying an external magnetic AC field, we did the magnetoresistive measurements. From the domain observation experiment, we observed domain walls movement by employing the ferrofluid water solution. The main interst in this thesis is to discuss the relationship between domain wall movements and the various magneto-electrical properties.
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Chou, Sen-Yih, and 周森益. "Observation PPV Thin Films with Spectrally Resolved Confocal Microscope." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/42354352314703393550.
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碩士國立中山大學
物理研究所
84
Recently combining microscopy and spectroscopy (spectromicroscopy) has been a subject of interest. We have constructed a spectrally resolved confocal microscope that has demonstrated submicron spatial resolution and high spectral sensitivity. A 0.5 m spectrometer was incorporated to reach spectral resolution better than 0.1 nm. While a 3-axis feedback- controlled piezo-based translation stage was employed to scan the sample over the range of 20 mm × 20 mm. Luminescencing poly(phenylenevinylene) (PPV) thin films coated on glass substrate were observed. In addition to the usual confocal reflective images, images constructed from photolumine- scence were also investigated. Luminescence intensity will increase when the film was irradiated with laser light. This phenomenon associated with the effect of photo-oxidation.
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Yeh, Hsin-Cheng, and 葉心丞. "Fuel Spray Observation and Development of Fuel Film Dynamic Model for Motorcycle EFI System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/e856qd.
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碩士國立臺北科技大學
車輛工程系所
95
The advantages of fuel injection system can offer more accruate and prompt fuel amount then that of carburetor. However, when the engine is operated under the transient operation condition, the wall wetting effect will influence the in-cylinder air fuel ratio. The wrong air fuel ratio will cause higher exhaust emissions and worse driveability. So, this paper will investigate the fuel dynamics in engine. The observation of spray pattern is performed in free and limited space. Then the fuel film dynamic model is used to correct the transient fueling step and simulate the in-cylinder air fuel ratio. The deposit factor and boiling time constant is determined by means of step change of fuel injection and measuring the exhaust gas air fuel ratio. The experimental result shows that choose the injector with proper spray pattern, and then aim at the inlet valve will reduce the wall wetting. The engine speed have important influence on parameter of fuel film dynamic model. and decreases with increasing engine speed, but weakly dependent upon injected fuel amount and throttle position.
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Huang, Yu-che, and 黃郁哲. "Hierarchical Distributed Index and File System for Astronomical Observation Data." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/78289777950100998346.
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碩士國立中央大學
資訊工程學系
102
The data of star observation is huge and increase continuously. Therefore it needs strong hardware to store these data. If these data lacks of a efficiently manage methodology, users will need to find and get data themselves, it’s not a good and efficient way. In order to solve this problem, this paper proposes a hierarchical design distributed file system to manage these astronomical observation data. First, this system uses Hierarchical Triangular Mesh to compute a key for every star, the values of these keys are sequential, so this paper links the servers in the system to form a ring structure, and let every server manages an unrepeated range of keys, range that every two adjacent servers manage are also continuous. Besides, The reason why adopting ring structure is due to its scalability, fault tolerance and availability, these advantages build the good foundation of the system. For increase the efficiency of query, the system needs execute multiple services. To reduce the load of servers, this paper builds three level of the ring structure and allocates these services to different layer. These layers are 1. Query Transaction, 2. Data index, 3. Storage. This design not only reduces the load, but also makes these services independent.
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Hung, Jen-Yi, and 洪仁奕. "Environmental-TEM Observation of Morphological Evolution for Star-Block Copolymer Thin Film with Solvent Vapor Annealing." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/pp5tkz.
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Haschenburger, Judith Kay. "Scour and fill in a gravel-bed channel : observations and stochastic models." Thesis, 1996. http://hdl.handle.net/2429/4843.
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This study investigates channel bed scour and fill as a result of individual flood events in a
gravel-bed channel. Given the complexity of interactions between hydraulic force, the texture and
arrangement of bed material, and input of sediment to a particular point of the channel bed, study
objectives were pursued with the view that bed material movement is a stochastic phenomenon.
A two-year field program was conducted in Carnation Creek, a small gravel-bed stream
draining 11 km2 on the west coast of Vancouver Island, British Columbia. In the 900 m study
reach, an array of measurement techniques, including scour indicators, magnetically-tagged stones,
and conventional survey, yielded information about the fluctuations of the channel bed elevation
and movement of scoured material for individual flooding periods.
Frequency distributions of scour and fill depths associated with individual flooding periods
are adequately modeled by negative exponential functions over the range of flood peak magnitudes
observed in Carnation Creek. Analysis of scour depths measured in streams on the Queen
Charlotte Islands demonstrates the applicability of the exponential model to flooding periods and
flood seasons. Further, exploratory analysis suggests that a regional scour depth model is
possible.
Power functions relating mean depths of scour and fill to flood peak discharge show that
depth increases with an increase in peak magnitude. Observed maximum scour depths in flooding
periods are linked, in general, to streambed conditions influenced by antecedent flow conditions.
These patterns in scour and fill exist within an overall pattern of increasing variability in depths of
scour and fill as peak discharge increases.
Evaluation of a heuristic model for mean travel distance as a function of particle size
proposed by Church and Hassan (1992) provides convincing evidence for its general merit. Mean
travel distance decreases inversely with particle size as size increases beyond the median diameter
of subsurface sediment. This trend is consistent in both individual flooding periods as well as
flood seasons. The majority of material finer than the median diameter of surface sediment is
supplied from subsurface material, which influences the travel distances of these finer fractions
because of burial. Computation of volumetric transport rates of bed material, based on the active scour depth
and width of the channel bed, the virtual velocity of particle movement, and sediment porosity,
suggests the potential for building scale correlations with streamflow, which have usually been
defined by bedload sampling during floods. Error analysis indicates that determination of active
width contributes most significantly to the imprecision of transport rate estimates.
Results underscore the stochastic nature of sediment transport in gravel-bed channels.
49
HUANG, HONG-YU, and 黃泓諭. "Observation Survey of the Bubbles and the Gas Film Evolution of Electrochemical Discharge Machining Using Transmission Microscope." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6x4g3s.
Full textAbstract:
碩士國立臺北科技大學
光電工程系
107
In this thesis, an electrochemical discharge machining transmission microscope, which composed of an transmission microscope, electrochemical discharge machining system, and image analysis system, was proposed for observing the formations of bubbles and the gas film during the machining. The mechanisms and relationships of the bubbles and the gas film evolution between their status and current signals need to be further investigated. An experimental setup with a conical/columnar electrode was constructed for the observations when there were with/without samples. Furthermore, a photograph of 10,000 shots per second by a high speed camera was taken to observe the status of the bubble and the the gas film evolution. As the result of the experimental, it showed that the bubbles and the gas film evolution was highly correlated with current signals. In the case of a columnar electrode, the largest volume was 3-17 seconds slower than the volume at the moment of the largest current. In the case of a conical electrode, the largest volume was 3-13 seconds slower than the volume at the moment of the largest current. Besides, the gas film of conical electrode was stable more fast than the columnar electrode, and the condition without quartz glass became stable more fast than the condition with quartz glass. From the images we got, it could be observed that of gas film broken and discharged was also observed, then the gas bubble was simultaneously produced to repair the defective gas film. In this thesis, the microscopic observation system we mentioned was described first, and then we discussed the the bubbles and the gas film evolution with the microscopic observation system we mentioned. Finally, the results of the observation were discussed, and then the conclusions and future prospects were presented.
50
Wu, Ming-Huei, and 吳明輝. "Construction of an optical cryostat and observations of magnetization reversal in CoFe/NiFe films." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/77309601609370358175.
Full textAbstract:
碩士國立東華大學
物理學系
99
Many past researches have reported results on FM/FM layer exchange coupling systems. However, further discussion on the intensity of magnetic anisotropy differences in Fe film magnetic coupling is of interest. In this study we set up a Magneto-optic Kerr effect system. Further improvements were made to the sensitivity. CoFe/NiFe with a quasi-spin valve structure were measured as a FM/FM film layer model system ,and discuss effects of temperature and magnetic field rate changes to magnetization reversal are discussed. We examine the scaling behavior of magnetic dynamics and how this model corresponds to the results. Scaling parameters obtained from experimental results are compared with related references.