Dans notre société dite de ' l'information ' depuis le discours prononcé par Lionel jospin en 1997, le numérique prend une place de plus en plus importante dans les activités personnelles et professionnelles des individus. habitué jusqu'alors aux pratiques organisationnelles liées au support papier, l'individu doit adapter ses pratiques au support numérique et se trouve confronté à de nombreuses difficultés ; il semble que ce changement de matérialité modifie en profondeur le rapport de l'individu aux documents qui sont les supports de sa pratique professionnelle.le terrain choisi pour mener cette étude est celui des organisations muséales. le document, y est en effet un élément essentiel de la circulation de l'information entre les différents acteurs associés autour d'un même processus organisationnel. l'inventaire du patrimoine, traditionnellement basé sur des pratiques à forte composante documentaire, reposant essentiellement sur le papier sera l'objet central autour duquel sera menée cette étude. a l'heure où le numérique envahit les organisations, les musées sont de plus en plus présents sur le web et les documentations scientifiques, outil essentiel du fonctionnement interne et vecteur de connaissance pour le public externe, se posent la question de la numérisation. cette étude vise à mieux comprendre en quoi la numérisation des documents modifie les pratiques documentaires, et plus largement comment l'organisation est impactée par ces changements de pratiques. il s'agira donc de s'interroger sur la manière dont le document participait à structurer les pratiques professionnelles dans le cas d'une activité traditionnellement basée sur le papier puis d'observer de la même manière, une activité de même ordre, mais qui reposerait sur des documents numériques. / In our society known as 'information' since the speech delivered by Lionel Jospin in 1997, digital is becoming increasingly important in the personal and professional activities of individuals. previously accustomed to paper-based organizational practices, individuals must adapt their practices to digital media and face many difficulties; it seems that this change in materiality profoundly modifies the relation of the individual to the documents which are the supports of his professional practice. The field chosen for this study is that of the museum organizations. the document is indeed an essential element of the flow of information between the different actors involved around the same organizational process. the inventory of heritage, traditionally based on practices with a strong documentary component, based essentially on paper, will be the central object around which this study will be conducted. At a time when digital is invading organizations, museums are increasingly present on the web and scientific documentation, an essential tool for internal functioning and a vector of knowledge for the external public, raises the question of digitization. this study aims to better understand how the digitization of documents modifies documentary practices, and more broadly how the organization is impacted by these changes in practices. it will be a question of how the document helped to structure professional practices in the case of an activity traditionally based on paper and then to observe in the same way, an activity of the same kind, but which would rely on digital documents.

O tema central desta Tese é a problematização dos modos de circulação da palavra na escola. Para tanto, a pesquisa fundamenta-se teoricamente na Psicanálise freudo-lacaniana, basicamente afirmando que a palavra é a revelação do sujeito, o meio por excelência de este ser reconhecido. As questões que o sujeito se faz e, ao mesmo tempo, endereça ao Outro: “Quem sou? O que desejo? O que me move?” atrela-se à pergunta “O que o Outro quer de mim?”, pois o sujeito deposita nesse Outro sua verdade e o constitui como um lugar de suposto saber sobre ele, saber desconhecido de nós mesmos. Essa interrogação endereçada ao Outro marca um enigma e uma falta, já que aponta para incompletude, inclusive, desse Outro. Ao mesmo tempo em que é o Outro que permite a função simbólica e apóia o sujeito, oferecendo um fundamento aos seus discursos e uma nomeação, também é essa falta do Outro que abre a possibilidade de uma certa liberdade do sujeito, num eterno deslizamento entre significantes, sem nenhuma garantia e sempre na busca pelo seu ser no desejo – e na falta – do Outro, numa impossibilidade de encontro e, também, numa permanência de movimento. Com tal referencial teórico de base, investigamos nesta pesquisa de que modo se configuram os espaços e as experiências na escola, quanto à circulação da palavra e à própria “tomada” da palavra, no sentido de propiciar o advento do sujeito e a construção de uma experiência coletiva. Partimos do pressuposto de que a escola se constitui como um espaço social fundamental, no qual circulam diferentes formas assumidas pelo discurso social contemporâneo. Nossas indagações referem-se, também, às formas pelas quais estaria se dando a circulação dos discursos vigentes, nesse espaço específico. Os dados foram coletados em situação de trabalho, no Colégio de Aplicação da Universidade Federal do Rio Grande do Sul, no qual atuei como orientadora escolar das séries iniciais, nos anos de 2008 e 2009. Para a análise dos dados, centrei minha atenção a respeito daquilo que experienciei – a partir do que vi ou ouvi e a partir do circuito de transferência que se criou entre mim, as crianças e os professores. Para tanto, valho-me dos conceitos freudo-lacanianos, e narro histórias que colocam a “palavra em movimento”, em experiência, de forma a produzir uma possibilidade de reflexão em torno das práticas escolares e do lugar do sujeito. Por fim, elaboro novos questionamentos, buscando problematizar tanto as minhas certezas como diferentes enunciados do senso comum, a respeito da criança em situação escolar. Para além de afirmar verdades e conclusões, acrescento ao final, outros pontos de interrogação. E, a partir da dúvida, sugiro o instigante caminho do movimento permanente, na procura de outras possibilidades de trabalho com crianças em idade escolar. / The central theme of this thesis is the problematization of modes of circulation of the word in school. To this purpose, the research is theoretically based on the Freudian- Lacanian psychoanalysis, basically affirming that the word is the revelation of the subject, the means par excellence for his recognition. The questions that the subject asks himself and, at the same time, addresses to the Other: "Who am I? What do I want? What makes me function?" are connected to the question "What does the Other want from me?", for the subject deposits his truth in the Other and constitutes it a place of supposed knowledge about himself, a knowledge unknown to ourselves. This question addressed to the Other exposes an enigma and a lack, as it refers to incompleteness, including that in the Other. While it is the Other that yields the symbolic function and supports the subject, offering a foundation for his speeches and a nomination, it is also this lack in the Other that opens the possibility of a certain liberty of the subject, in a perpetual shifting among signifiers with no guarantees and always in search for his being in the Other’s desire - and lack, in an impossibility of encounter and also in a permanence of movement. With this theoretical base, this research investigated how the spaces and experiences in school are configured, regarding the circulation of the word and the assumption of the word, in order to promote the advent of the subject and the construction of a collective experience. We presuppose that the school is a fundamental social space in which different forms created by the contemporary social discourse circulate. Our questions also refer to the ways the existing discourses circulate, in this specific space. The data were collected at the Colégio de Aplicação school of the Federal University of Rio Grande do Sul (UFRGS), in which I worked as school counselor for the early grades, in the years 2008 and 2009. In respect to data analysis, I focused my attention on what I experienced – what I saw or heard and the transference circuit created among the children, the teachers and me. For that, I utilize Freudian-Lacanian concepts, and I narrate stories that put the word “in movement”, in experience, in order to produce a possibility of reflection on the school practices and the role of the subject. Finally, I formulate new questionings, seeking to problematize both my certainties and different common sense statements regarding the child in the school situation. In addition to asserting truths and conclusions, I present other question marks, in the end. And, stemming from doubt, I suggest the intriguing path of constant movement in search of other opportunities to work with school-age children.

by Ling Chao Dong. / Publication date from spine. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves [102]-107). / ABSTRACT --- p.iii / ACKNOWLEDGEMENTS --- p.v / LIST OF ABBREVIATIONS --- p.vi / Chapter CHAPTER 1 --- Introduction / Chapter 1.1 --- Physiological measurement by EBI technique --- p.1 -1 / Chapter 1.2 --- Application of the EBI technique in the human thorax --- p.1 -2 / Chapter 1.3 --- Development in EIR measurement-An overview --- p.1 -4 / Chapter 1.4 --- Project objective --- p.1-7 / Chapter 1.5 --- Problems to be solved for EBI data acquisition system --- p.1-8 / Chapter 1.6 --- Main contribution of this project --- p.1 -8 / Chapter 1.7 --- Thesis outline --- p.1-9 / Chapter CHAPTER 2 --- Principles of The EBI Technique for Cardiopulmonary System / Chapter 2.1 --- The data acquisition system (DAS) --- p.2-1 / Chapter 2.1.1 --- Impedance measurement --- p.2-1 / Chapter 2.1.2 --- Data extraction and collection --- p.2-3 / Chapter 2.2 --- Constant current source --- p.2-3 / Chapter 2.3 --- Single-source multi-channel EBI controller --- p.2-5 / Chapter 2.4 --- Computer interface --- p.2-6 / Chapter 2.5 --- Tissue impedance and impedance change --- p.2-7 / Chapter 2.5.1 --- Impedance of living tissue --- p.2-7 / Chapter 2.5.2 --- Origins of impedance change --- p.2-8 / Chapter 2.6 --- Cardiovascular physiology in human body --- p.2-10 / Chapter 2.6.1 --- Structure and function of the circulatory system --- p.2-10 / Chapter 2.6.2 --- Principles of hemodynamics in pulmonary circulation --- p.2-12 / Chapter 2.7 --- Clinical application of the EIR waveform --- p.2-15 / Chapter 2.7.1 --- Physiological basis --- p.2-15 / Chapter 2.7.2 --- Clinical application --- p.2-16 / Chapter CHAPTER 3 --- The Composition of EIR Signal / Chapter 3.1 --- Introduction --- p.3-1 / Chapter 3.1.1 --- The impedance change in the transthoracic section --- p.3-1 / Chapter 3.1.2 --- Origins of impedance change in pulmonary circulation --- p.3-2 / Chapter 3.2 --- Examination of contribution of impedance sources via electrolytic tank model --- p.3-3 / Chapter 3.2.1 --- Electrolytic tank set-up --- p.3-3 / Chapter 3.2.2 --- Electrolytic tank procedure --- p.3-4 / Chapter 3.2.3 --- Experimental results and discussion --- p.3-5 / Chapter 3.3 --- The interference behaviour via computer simulation --- p.3-8 / Chapter 3.3.1 --- 2D numerical model --- p.3-9 / Chapter 3.3.2 --- Computer simulation --- p.3-10 / Chapter 3.3.3 --- Results and discussion --- p.3-11 / Chapter 3.4 --- The variation of EIR waveform with electrode size --- p.3-12 / Chapter 3.4.1 --- An electronic model --- p.3-12 / Chapter 3.4.2 --- A simulated source of impedance change in pulmonary circuit --- p.3-16 / Chapter 3.4.3 --- Variation of EIR waveform via computer simulation --- p.3-18 / Chapter 3.4.4 --- Computer simulation results and discussion --- p.3-20 / Chapter 3.5 --- Discussions --- p.3-20 / Chapter 3.6 --- Conclusion --- p.3-21 / Chapter CHAPTER 4 --- A Guard Electrode System to Improve the EIR Measurement / Chapter 4.1 --- Introduction --- p.4-1 / Chapter 4.2 --- Normal electrode system --- p.4-2 / Chapter 4.2.1 --- Normal electrode configuration --- p.4-2 / Chapter 4.2.2 --- Current-guarding technique for the constant-voltage system --- p.4-2 / Chapter 4.3 --- Electric field guarding --- p.4-3 / Chapter 4.4 --- Methods of study --- p.4-4 / Chapter 4.5 --- Results --- p.4-5 / Chapter 4.4.1 --- The change of electric field distribution with guarding --- p.4-5 / Chapter 4.4.2 --- Result from electrolytic tank simulation --- p.4-5 / Chapter 4.4.3 --- Variation of EIR waveform with/without guarding in human thorax --- p.4-6 / Chapter 4.5 --- Discussions and conclusion --- p.4-6 / Chapter CHAPTER 5 --- Human Measurements / Chapter 5.1 --- Introduction --- p.5-1 / Chapter 5.2 --- Variation of EIR waveform from normal human body --- p.5-2 / Chapter 5.2.1 --- Methods --- p.5_2 / Chapter 5.2.2 --- The variation of EIR waveform with electrode position and size --- p.5-3 / Chapter 5.3 --- Clinical observation --- p.5-4 / Chapter 5.3.1 --- What is PTMV --- p.5-4 / Chapter 5.3.2 --- Observing EIR waveform during the PTMV operation --- p.5-5 / Chapter 5.3.3 --- Results and discussion --- p.5-5 / Chapter 5.4 --- EIR for use in PTMV operation --- p.5-7 / Chapter 5.4.1 --- Conventional diagnostic and monitoring methods for PTMV --- p.5-7 / Chapter 5.4.2 --- The characteristic of EIR waveform with mitral stenosis --- p.5-7 / Chapter 5.4.3 --- Use of EIR as an assessing/monitoring tool for PTMV operation --- p.5-8 / Chapter 5.4.4 --- Methodology in this study --- p.5-8 / Chapter 5.4.5 --- Result and discussion --- p.5-9 / Chapter 5.5 --- Conclusion --- p.5-10 / Chapter CHAPTER 6 --- Recapitulation and Topic for Future Investigation / Chapter 6.1 --- Recapitulation --- p.6-1 / Chapter 6.2 --- Topics for future investigation --- p.6-3 / Chapter 6.2.1 --- Improvement to the DAS --- p.6-3 / Chapter 6.2.1 --- Data analysis for PTMV --- p.6-3 / REFERENCES --- p.R-1 / APPENDICES / Chapter A. --- Circuit diagram of electrical bio-impedance source simulator --- p.A-l / Chapter B. --- Circuit diagram of the electrical bio-impedance detector --- p.A-2 / Chapter C. --- Circuit diagram of multi-channel controller for multi-EBI detection --- p.A-3 / Chapter D. --- List of publications --- p.A-4

The master thesis studies the impact of the entropy gradient on the vorticity of ve- locity field, particularly by applying the linear momentum balances. These balances are formulated for Thermo-viscous fluids (later fluids) and Thermo-viscous-elastic ma- terial (later solids) with the other balances (energy, mass, etc.). In order to derive these balances, the Classical continuum mechanics approach is used along with the respec- tive Variational principles. The thesis emphasizes the Variational principles applica- tion representing the modification of the Bateman principle [Bat29] and its comparison with the Classical approach, linked to the L. Crocco work [Cro37], particularly in the case of vorticity generation. It is pointed that by the definition of the dissipative en- tropy sdis a harmony of both approaches can be achieved and that, in the case of an appropriate limit, the direct effect of the entropy gradient on the vorticity of velocity field can be demonstrated. By applying this conclusion the relationship between the change of circulation among a closed curve and released heat on the given geometry is indicated.

Results from Cal Poly's recent wind tunnel test, during the Winter of 2011-2012, in the 40- by 80-foot test section at the National Full-Scale Aerodynamics Complex (NFAC) at NASA Ames Research Center are presented. AMELIA, the Advanced Model for Extreme Lift and Improved Aeroacoustics, is the first full-span, cruise efficient, short take-off and landing (CESTOL) model incorporating leading- and trailing-edge blowing wing circulation control and over-the-wing mounted turbine propulsion simulators (TPS) to date. Testing of the 10 foot span model proved successful and was the result of a 5 year NASA Fundamental Aeronautics Program Research Announcement. The test generated extensive low-speed experimental aerodynamic and acoustic measurements. All of the results associated with Cal Poly's effort will be available in an open-source validation database with the goal of advancing the state-of-the-art in prediction capabilities for modeling aircraft with next generation technologies, focusing on NASA's N+2 generation goals. The model's modular design allowed for testing of 4 major configurations. Results from all configurations are presented. Out of a total of 292 data runs, 14 repeat run configurations were obtained. Overall repeatability of test data are good. Factors contributing to non-repeatability in the test data were assessed and showed high pressure air line temperature to be a primary factor. Test data shows drastic improvements in performance are obtained when incorporating leading edge blowing: wing stall can be delayed to more than 25 degrees angle-of-attack at lift coefficients exceeding six. Without the introduction of leading edge blowing to increase boundary layer momentum and maintain flow attachment around the leading edge, STOL performance suffers. Similar runs for isolated trailing edge blowing show a reduction in maximum lift coefficient to three with stall occurring at zero angle-of-attack. Testing at two engine pylon heights allowed for the highly coupled propulsion and flow control system to be characterized.

Regions that have experienced recent successive cold winters such as the Northeast of North America and Siberia have endured critical social and economic impacts from anomalous low temperatures in recent years, despite warming global temperatures. It is well known that the Tropospheric Polar Vortex (TPV), or jet stream, is a primary influence on many mid-latitude winter weather patterns. However, the strong circumpolar westerlies that maximize at around 60° latitude just above the tropopause, known as the Stratospheric Polar Vortex (SPV), can affect tropospheric circulation and thus winter weather in the Northern Hemisphere. Strong upward propagating waves can affect the geographic extent and strength of the SPV resulting in a weakened polar vortex state, which can in turn bring persistent weather events to the mid-latitudes. Here, an index of SPV spatiotemporal variability is presented using observation based analysis of zonal wind and geopotential height to show changes in SPV behavior at a seasonal scale from 1950-2018. Utilizing the CMIP5 suite of global climate models, historical and projected simulations of the SPV's climatological extent and strength are analyzed from 1915 to the end of this century, taking into account models with enhanced stratospheric representation. Simulated results are largely consistent with trends in the observational data, which suggest continued increases in average SPV size throughout this century. If future SPV disturbances increase in frequency, there could be negative impacts in ecosystem and agricultural health, infrastructure damage, and to human safety. A more advanced understanding of SPV trends and anomalous events could improve forecasts of cold air outbreaks (CAOs) and severe or persistent winter weather.

Mesoscale turbulence is ubiquitous in the surface ocean and has significant impact on the large-scale ocean circulation and its interaction with the climate. Ocean currents are most energetic in the mesoscale range on the scales of 20-200 km and recent studies have shown that the surface kinetic energy associated with the mesoscale undergo a large seasonal modulation. At scales below the mesoscale where geostrophic approximation breaks down lies the submesoscale (1-20 km). It is at this scale that baroclinic instabilities feed off the available potential energy stored in the deep wintertime mixed layers, known as mixed-layer instability, and in return energize the mesoscale via inverse energy cascade under the constraint of stratification and rotation. Mixed-layer instability (MLI) is inherently submesoscale due to the depth scale associated with it. We show the robustness of MLI on global scale in modulating seasonality in surface mesoscale turbulence by analyzing outputs from a Community Earth System Model fully ocean-atmosphere coupled run with eddying resolution. Due to the rigorous vertical velocities associated with mesoscale turbulence, in the context of climate, they have been shown to make major contributions to the transport of heat and tracers including carbon. More recently, it has been argued that submesoscale heat transport may dominate over the mesoscale. We ask the same question for tracers: What is the relative contribution of submesoscale transport (local effect) over the energized mesoscale via inverse energy cascade (remote effect)? In order to investigate their impact on the dynamics and tracer transport, we run our own seasonally resolving submesoscale permitting channel model configured to represent the zonal-mean view of the Southern Ocean coupled to a full biogeochemical model. The Southern Ocean is unique in that, apart from it being the only zonally re-entrant basin on Earth, it is one of the high-nutrient low-Chlorophyll oceans and iron is predominantly the limiting nutrient for primary production within the open-ocean region. As the basin responsible for generating the densest water mass properties, i.e. Antarctic Bottom Water, and outcropping isopycnals, primary production and the associated biological carbon pump have been of long interest to the biogeochemical and climate community. We provide an independent estimate from satellite observations of the seasonal cycle in phytoplankton biomass by taking advantage of the biogeochemical Argo floats, in which we show that the biomass reaches its maximum around December in the open-ocean region. Our modelled ecosystem reaches its maximum in November, roughly a month earlier, likely due to the lack of aeolian dust input at the surface, and glacial and bathymetric sources from the south in our model. Utilizing spectral analysis and the generalized Omega equation, we decompose the eddy transport of heat and iron to its submesoscale (local) and mesoscale (remote) contributions. With the exception near the surface where mixed-layer instability is active, our results indicate that mesoscale vertical transport is of first-order significance in calculating the budgets and supplying iron across the mixed-layer base to the surface where phytoplankton can effectively photosynthesize.

Mineral dust both influences and is influenced by climate on many timescales, from seconds to epochs. Its complex interactions with the climate system are still being unraveled. For example, dust fluxes change in tandem with other records of past changes in climate, and dust source is often presumed to change as well, in response to shifts in climate conditions in source regions; changes in wind regimes; or changes in atmospheric transport pathways. In this work, I investigate dust records from the Southern Hemisphere from ice core and marine sediment core climate archives, looking at both flux and provenance in order elucidate the conditions that allowed for those particles to travel from source to sink. Using multiple radiogenic isotope systems as tracers (87Sr/86Sr, εNd(0), 206Pb/207Pb, and 208Pb/207Pb), I geochemically “fingerprint” of dust particles from Southern Hemisphere climate archives over the last glacial cycle. I compare the dust fingerprints to potential source areas (PSA’s) from across the Southern Hemisphere in order to identify the sources of dust found in the WAIS Divide and Taylor Glacier ice cores from West Antarctica, as well as from marine sediment core ELT39.75 in the Tasman Sea. I use endmember mixing theory to determine the relative contribution of different sources to the climate archives over time. In West Antarctica, I geochemically identify specific local volcanoes from Marie Byrd Land as significant particle contributors to the WAIS Divide ice core during the previous glacial period. In the Tasman Sea, I identify a specific region of southeastern Australia as primary the dust source over the past glacial cycle, with the source remaining constant across glacial-interglacial climate transitions. This clarifies that the “fingerprint” of Australian dust is relatively invariant over time and allows a single Australian signature to be used as an endmember for identifying dust provenance in climate archives downwind. I also identify the dust sources in the WAIS Divide during the Last Glacial Maximum and through the early deglacial, identifying southern South America as the predominant source during cold stages. WAIS Divide and Taylor Glacier dust records do not record dust source changes across millennial-scale climate events, suggesting that a) the source regions did not change, b) the transport pathways remained pinned, or c) the proxy is not sensitive to changes in these variables. Contributions from local volcanoes are also inferred from the WAIS dust record using mixing theory. In summary, I find that the radiogenic isotope fingerprint of dust samples from the archives analyzed show subtle or no changes in source over climate transitions, and therefore the strategy of dust particles as a tracer of past atmospheric circulation pathways should be approached cautiously.

No description available.

Abstract not available