Dissertations / Theses: 'Multi-media'

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Merkley, John. "Transitions : multi-media abstract sculpture." Virtual Press, 2004. http://liblink.bsu.edu/uhtbin/catkey/1305451.

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The first objective of this creative project was to create seven Non-figurative, abstract, multi-media (wood, metals, clay, concrete, glass) sculptures that attempted to express some of the feelings experienced during transitions in life. The second objective was to explore the continuum of abstract sculptural art: from art being simply aesthetically stimulating compositions to art that emphasizes meaning or purpose first, and being aesthetically pleasing or stimulating second.
Department of Art

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Prax, Patrick. "Do MMORPGs enhance MMMCCL : Multi-Media Multi-Channel Communication Literacy." Thesis, Uppsala University, Media and Communication, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-106854.

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Purpose/Aim: The aim of the paper is to find out if there is a correlation between playing MMORPGs and having better skills in using multi-channel communication.

Material/Method: A media-skill test was conducted in the internet testing the participants’ ability to respond to targets in three different channels and media at the same time. The results of the study where used for statistical comparisons of the different groups of participants sorted according to their media use.

Main results: People who use the internet more and who play computer games, especially MMORPGs, have a better Multi-Media Multi-Channel Communication Literacy. There is fast learning visible for people with a use of the respective medium of up to five hours a week. Playing makes you better, not playing a lot.

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Niessner, Jennifer. "Multi-scale modeling of multi-phase-multi-component processes in heterogeneous porous media." Stuttgart Inst. für Wasserbau, 2006. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-27697.

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Lu, Qin. "A parallel multi-block/multi-physics approach for multi-phase flow in porous media /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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White, Andrew C. "Students' use of technology in an interdisciplinary multi-media course and the implications for teaching multi-media technology /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901299.

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Ainslie, Susan. "Intensive language learning : A multi-media approach." Thesis, University of Brighton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309004.

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AUMONT, JACQUES. "Extension d'eao a des ensembles multi-media." Paris 6, 1987. http://www.theses.fr/1987PA066724.

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Pour aider a l'utilisation des didectitiels, l'auteur, dans un premier temps passe en revue quelques langages-auteurs pour mettre en evidence les difficultes et limites. Ensuite, il presente une analyse des besoins, tout sur le plan pedagogique que materiel. Face a ce besoin, un cahier des charges est redige et permet de mettre au point un systeme simple d'utilisation liant informatique et audiovisuel a partir de materiels deja acquis

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Deliyannis, I. "Interactive multi-media systems for science and rheology." Thesis, Swansea University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636434.

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This work is associated with the construction of multi-media systems for scientific and rheological case-studies, introducing the element of interactivity. The base-data are often the end-result of simulation (CFD) or experimental investigations, utilised in some post-processing form, calling upon visualisation. Other issues addressed include the organisation and presentation of data, into meaningful and easily-accessible forms. This reveals multifaceted presentation requirements. In this respect, current commercial presentation applications have been found lacking. They rarely offer cross-platform compatibility, provide limited programmability, are restrictive on data-interaction, and only support static WWW-delivery. Hence, a substantive goal has been to deliver comprehensive multimedia-system functionality, both as a stand-alone system and over the WWW, via a single, multi-purpose implementation. A multimedia framework is employed, to embrace the interactive and visual presentation of a series of scientific and rheological case-studies with large conventional (static), and multi-mode (dynamic) data-sets. Graphs are utilised to enable rigorous multimedia system (MMS) design, effortless updates and unproblematic future expansion. Multimedia environments (MME) facilitate rapid prototyping and a data-oriented approach is advocated. As a result, the customised presentation-attributes vary widely from case-study to case-study, touching upon aspects such as user-interface, interaction, data-content organisation and presentation-styles. Case-studies include educational and scientific/industrially-related content. A film introducing the scientific area of non-Newtonian fluids is digitally constructed, using solid-modelling animations, simulation-data, filmed experiments, music, voiceover, and transitions. Content-delivery for multiple media is implemented, and includes interactive WWW or CD/DVD multi-language versions and static (videotape, DV) modes. Next, a historical multimedia (MM) presentation (History of Rheology MMS) is generated. This features an informal user-interface dynamic rendering of content, making extensive use of client-server technology for interactive stream-delivery over the WWW. Synchronisation is demanded for multiple streamed data-types, such as: voiceover, music, experimental and CFD-sourced data, animated-graphs, and rendered wire-frame graphics. Scientific/industrial data-sets of increasing complexity are featured.

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Abdul-Huda, Bilal Anas Hamed. "A system for managing distributed multi-media data." Thesis, University of Ulster, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328195.

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Miller, Sarah Judith. "Scattering of multi-frequency waves by random media." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.256408.

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Mak, Wai Y. "Ad Hoc Network Architecture for Multi-Media Networks." Thesis, Monterey California. Naval Postgraduate School, 2007. http://hdl.handle.net/10945/2988.

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The desire for more intelligence in the battlefield has given rise to the idea of routing video images over wireless sensor networks. This would apprise combat decision makers with actual images of battlefield developments and allow them to make sound decisions. To achieve this objective, the characteristics of video traffic must be studied and understood. This thesis focuses on evaluating the possibility of routing video images over a wireless sensor network. Video traffic is modeled and simulations are performed via the use of the Sun Small Programmable Object Technology (Sun SPOT) Java development kits configured in three different network topologies: the star topology, binary tree topology and chain topology. It is known that video traffic is self similar and can be obtained by aggregating a large number of On-Off message sources. Hence, an On-Off model using Pareto distribution function is used to model video traffic over the network. In this thesis four self-similar shaping parameters, i.e., alpha(On) = 1.2, 1.4, 1.7 and 1.9 are used in the simulations. The performance of each topology is evaluated based on parameters like mean throughput, mean interarrival time, mean packet drop, and mean delay.
Singapore Armed Forces author.

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Olson, William Mathew. "Effectiveness and cost benefit review of multi-media training." Menomonie, WI : University of Wisconsin--Stout, 2005. http://www.uwstout.edu/lib/thesis/2005/2005olsonw.pdf.

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Phillips, Ronald Jefferson. "Multi-sphere hydrodynamic models of suspensions and porous media." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/39031.

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Thompson, Tassy Ellen. "Furrow: a multi-media journey in improvisation and performance." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1318957826.

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Freedman, Vicky Lynn. "Density-dependent, multi-species transport in saturated porous media /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488193665235174.

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Petrasch, Jörg. "Multi-scale analyses of reactive flow in porous media." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:29641.

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Holst, Henrik. "Multi-scale methods for wave propagation in heterogeneous media." Licentiate thesis, Stockholm : Datavetenskap och kommunikation, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10511.

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Soukup, Charles. "Communicative performance in a multi-media computer-mediated community." [Lincoln, Neb. : University of Nebraska-Lincoln], 2000. http://international.unl.edu/Private/2000/soukupdis.pdf.

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Thesis (Ph. D.)--University of Nebraska--Lincoln, 2000.
PDF text: [4] leaves table of contents and acknowledgments, [3] leaves abstract, 244 leaves dissertation : col. ill. Includes bibliographical references (leaves 218-239 of dissertation).

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Mazalek, Alexandra 1976. "Media tables : an extensible method for developing multi-user media interaction platforms for shared spaces." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33882.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2005.
Includes bibliographical references (p. 153-157).
As digital entertainment applications evolve, there is a need for new kinds of platforms that can support sociable media interactions for everyday consumers. This thesis demonstrates an extensible method and sensing framework for real-time tracking of multiple objects on an interactive table with an embedded display. This tabletop platform can support many different applications, and is designed to overcome the commercial obstacles of previous single purpose systems. The approach is supported through the design and implementation of an acoustic-based sensing system that provides a means for managing large numbers of objects and applications across multiple platform instances. The design requires precise and dynamic positioning of multiple objects in order to enable real-time multi-user interactions with media applications. Technical analysis shows the approach l:o be robust, scalable to various sizes, and accurate to a within a few millimeters of tolerance. A qualitative user evaluation of the table within a real-world setting illustrates its usability in the consumer entertainment space for digital media browsing and game play. Our observations revealed different ways of mapping physical interaction objects to the media space, as either generic controls or fixed function devices, and highlighted the issue of directionality on visual displays that are viewable from different sides.
(cont.) The thesis suggests that by providing a general purpose method for shared tabletop display platforms we give application designers the freedom to invent a broad range of media interactions and applications for everyday social environments, such as homes, classrooms and public spaces. Contributions of the thesis include: formulation of an extensible method for media table platforms; development of a novel sensing approach for dynamic object tracking on glass surfaces; a taxonomy of interface design considerations; and prototype designs for media content browsing, digital storytelling and game play applications.
Alexandra Mazalek.
Ph.D.

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Gustafsson, Daniel. "Utveckling av Multi Monitor Solution för SMS Smart Media Solution." Thesis, Mälardalen University, School of Innovation, Design and Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-8036.

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Sammanfattning

Detta examensarbete inom produkt- och processutveckling har genomförts på uppdrag av SMS Smart Media Solutions AB i Stockholm. Syftet med arbetet har varit att ta fram och utveckla ett stativ som ska kunna hålla upp till 4 stycken datorskärmar och som tillåter ergonomisk anpassning och användning. Under projektets gång har antalet skärmar utökats från 4 till 8 för att tillmötesgå uppkomna kund- och marknadskrav. Målet med examensarbetet har varit att ta fram en färdig prototyp som ska kunna ligga till grund för tillverkning av stativet.

Under utvecklingsarbetet har verktyg som QFD, funktionsanalys, Ishikawa-diagram, Pugh’s jämförelsematris och FMEA använts för att säkerställa att kund-, marknads-, kvalitets och funktionskrav uppfylls. Arbetet inleddes med en idégeneringsfas som utmynnade i ett antal olika koncept. Koncepten utvärderades utifrån kravspecifikation, funktion, antal standardkomponenter och pris. Konceptet som ansågs starkast utvecklades till en prototyp vilken i sin tur testades och utvärderades.

Resultatet av examensarbetet är att det utvecklade stativet är infört i SMS Smart Media Solutions’ produktportfolio och kommer att finnas med i SMS’ produktkatalog för 2010. Stativet motsvarar alla krav som satts upp i kravspecifikationen och alla problemen som definierats i problemformuleringen har lösts.

Abstract

This thesis in product and process development has been made in cooperation with SMS Smart Media Solutions AB in Stockholm. The aim of the thesis has been to develop a new display bracket that can carry up to 4 monitors and that allows ergonomically adjustments and usage. During the project the amount of maximum monitors has been changed from 4 to 8 to meet the demand of the customers and the market. The goal of the thesis has been to develop a prototype that would be the ground of the future bracket that will be offered in SMS Smart Media Solutions’ product portfolio.

To make sure that the developed bracket meets all the demands and criteria, tools like QFD, analysis of function, Ishikawa diagram, Pugh’s matrix and FMEA have been used. The process of the product development started with brainstorming and concept generation. The developed concepts were evaluated using analysis of requirements, costs, functions and the amount of used standard components. The winning concept was carried on into a prototype that was tested, evaluated and improved.

The result of the thesis is that the developed bracket has been integrated to SMS Smart Media Solutions’ product portfolio and will be added to SMS’ product catalogue for 2010. The final bracket met all the criterions that were set in the specification of requirements and all the problems form the problem statement were solved.

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Dixiao, Bao. "Transport of Multi-Walled Carbon Nanotubes in Saturated Porous Media." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-177092.

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Carbon nanotubes (CNTs) have been one of the most studied nanoparticles and incorporated into various consumer products. It has been reported that CNTs can enter groundwater systems by accidental or intentional release into the subsurface. As transport mechanisms of CNTs are not well understood, investigation on mobility of CNTs in the subsurface will be helpful to define disposal regulations of CNTs. The objective in this study is to investigate the effect of solution chemistry (pH and ionic strength) and physical factors (collector grain size and flow rate) on the transport of multi-walled carbon nanotubes (MWCNTs). One-dimensional convection-dispersion model incorporated with collector efficiency for cylindrical nanoparticles was used to simulate the transport of MWCNTs in porous media. It was observed that higher pH led to increase in mobility of MWCNTs. The critical point of ionic strength for MWCNTs getting mobilized was narrowed down in the range of 2 to 5 mM. It was observed that the finer porous media could retain more nanoparticles. The decrease in pore water velocity resulted in a clear retardation, lowered the hydrodynamic force acting on the particles and led to more retention.

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Zurich, Mark A. "A life-cycle analysis of a multi-media teleconferencing network." Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-02162010-020144/.

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Leong, Sau Mun Dawn-joy. "Scheherazade's sea: a mixed media, multi-sensory installation and performance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B47295909.

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Scheherazade’s Sea is an interdisciplinary creative work, which brings together music, visual art, literary text, digital media, and performance art. Interdisciplinary creativity has existed for centuries in history. In fact, the ancients of different civilisations viewed the disciplines of science and art as inseparable. The late nineteenth century and early twentieth century saw a resurgence of interdisciplinary interest in the form of artistic collaborations among proponents of the different arts forms, mainly music, visual art, theatre and dance. Today, this coalescence now includes digital and electronic media. However, such works focus mainly on the more dominant distal senses of sight and sound and fail to consider the multimodality of natural sensory perception in the experience of art, and many of these works are performed in settings where artists are separated from audience by physical and psychological barriers. In Scheherazade’s Sea, I shall address the limitations of prevalent approaches, by including the proximal senses, removing the traditional physical barriers and encouraging audience participation. On another level, Scheherazade’s Sea serves as a vehicle for exploration and reflection of the inherent sensory and cognitive peculiarities associated with Asperger’s Syndrome, and their possible influences upon creativity and artistic expression. Sensory and cognitive idiosyncrasy is a common feature in Asperger’s Syndrome. Individuals suffer from extremes of either heightened sensitivity or low arousal to external sensory stimuli, and their innate cognitive patterns differ from that of the typical majority. As a result, the sensory and cognitive world of a person with Autistic Spectrum Disorder can be fragmented, disjointed and confusing. While there exists substantial literature about famous artists with Asperger’s Syndrome and various aspects of their creativity, there is, to date, limited documentation from the perspective of the artist with Asperger’s Syndrome, using an original interdisciplinary work to illustrate the possible ways in which sensory and cognitive differences may affect and influence creative choices and outcomes. By charting and examining the features and various processes in the creation of Scheherazade’s Sea, I hope to discover and contribute more insights into this area of interdisciplinary study. The purpose of this examination is not to add to the already vast body of programmes aimed at social rehabilitation and adaptation to the neurotypical world, but rather to open more avenues for the identification and development of innate abilities in autistic individuals. My intention is not to ‘fix what is broken’, but to discover and empower beauty in the unusual and the different.
published_or_final_version
Music
Master
Master of Philosophy

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Amos, Janet R. "Francis Poulenc's sonata for two pianos : a multi-media presentation." Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1027122.

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This project created a multi-media work that combined music and visual images in a video format to culminate my graduate studies. I explored computer graphics and video technology while drawing from a multi-faceted background in art. This project attempts to communicate through visual expression the innate qualities of music and sound, while reflecting my interests as an artist. I intend this work to be viewed as either a live performance piece to be accompanied by the piano duet, Sonata for Two Pianos, or as a recording on a computer monitor or television.
Department of Art

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Jiang, Jianmin. "Multi-media data compression and real-time novel architectures implementation." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239417.

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Hashemi, Mohammad Reza. "Direct numerical simulation of multi-phase flow in complex media." Doctoral thesis, Universitat Politècnica de Catalunya, 2022. http://hdl.handle.net/10803/673617.

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In numerous applications, two-phase liquid-gas transport at sub-millimeter length scales plays a substantial role in the determination of the behavior of the system at hand. As its main application, the present work focuses on the polymer electrolyte membrane (PEM) fuel cells. Desirable performance and operational life-time of this class of high-throughput energy conversion devices requires an effective water management, which per se relies on proper prediction of the water-air transport mechanisms. Such two-phase flow involves interfacial forces and phenomena, like hysteresis, that are associated with the physicochemical properties the liquid, gas, and if present, the solid substrate. In this context, numerical modeling is a viable means to obtain valuable predictive understanding of the transport mechanisms, specially for cases that experimental analyses are complicated and/or prohibitively expensive. In this work, an efficient finite element/level-set framework is developed for three-dimensional simulation of two-phase flow. In order to achieve a robust solver for practical applications, the physical complexities are consistently included and the involved numerical issues are properly tackled; the pressure discontinuity at the liquid-gas interface is consistently captured by utilizing an enriched finite element space. The method is stabilized within the framework of variational multiscale stabilization technique. A novel treatment is further proposed for the small-cut instability problem. It is shown that the proposed model can provide accurate results minimizing the spurious currents. A robust technique is also developed in order to filter out the possible noises in the level-set field. It is shown that it is a key to prevent irregularities caused by the persistent remnant of the spurious currents. It is shown how the well-established contact-line models can be incorporated into the variational formulation. The importance of the inclusion of the sub-elemental hydrodynamics is also elaborated. The results presented in the present work rely on the combination of the linearized molecular kinetic and the hydrodynamic theories. Recalling the realistic behavior of liquids in contact with solid substrates, the contact--angle hysteresis phenomenon is taken into account by imposing a consistent pinning/unpinning mechanism developed within the framework of the level-set method. Aside from the main developments, a novel technique is also proposed to significantly improve the accuracy and minimize the the loss in the geometrical features of the interface during the level-set convection based on the back and forth error compensation correction (BFECC) algorithm. Within the context of this thesis, the numerical model is validated for various cases of gas bubble in a liquid and liquid droplets in a gas. For the latter scenario, besides free droplets, the accuracy of the proposed numerical method is assessed for capturing the dynamics droplets spreading on solid substrates. The performance of the model is then analyzed for the capturing the configuration of a water droplet on an inclined substrate in the presence the contact--angle hysteresis. The proposed method is finally employed to simulate the dynamics of a water droplet confined in a gas channel and exposed to air-flow.
Existen numerosas aplicaciones industriales en las que transporte bifásico (líquido-gas) a escalas submilimétricas resulta crucial para la determinación del comportamiento del sistema en cuestión. Entre todas ellas, el presente trabajo se centra en las pilas de combustible con membrana de electrolito polimérico (PEMFC). El rendimiento deseable y la vida útil operativa de esta clase de dispositivos de conversión de energía de alto rendimiento requieren una gestión eficaz del agua (conocida como “water management”), que per se depende de la predicción adecuada de los mecanismos de transporte de agua y aire. Así pues, el análisis del flujo microfluídico de dos fases obliga considerar fuerzas y fenómenos interfaciales, tales como la histéresis, que están asociados con las propiedades fisicoquímicas del líquido, el gas y, si está presente, el sustrato sólido. En este contexto, la modelización numérica es una alternativa viable para obtener una predicción precisa de los mecanismos de transporte, especialmente en aquellos casos en los que los análisis experimentales son prohibitivos, ya sea por su complejidad o coste económico. En este trabajo, se desarrolla un marco eficiente, basado en la combinación del método de elementos finitos y el método de “level-set”, para la simulación tridimensional de flujos bifásicos. Con el fin de lograr una herramienta numérica robusta para aplicaciones prácticas, las complejidades físicas se incluyen consistentemente y los problemas numéricos involucrados se abordan adecuadamente. Concretamente, la discontinuidad de la presión en la interfaz líquido-gas se captura consistentemente utilizando un espacio de elementos finitos enriquecido. La estabilización del método se consigue mediante la introducción de la técnica de multiescalas variacionales. Asimismo, se propone también un tratamiento novedoso para el problema de la inestabilidad de tipo “small-cut”. Se muestra que el modelo propuesto puede proporcionar resultados precisos minimizando las corrientes espurias en la interfaz liquido-gas. Complementariamente, se presenta una nueva metodología para filtrar el ruido en el campo de “level-set”. Esta metodología resulta ser crucial para prevenir las irregularidades provocadas por el remanente persistente de las corrientes espurias. El comportamiento de la línea de contacto es considerado a través de la inclusión los modelos correspondientes en la formulación variacional. A este respecto, el presente trabajo aborda la importancia de la inclusión de la hidrodinámica subelemental. Los resultados presentados se basan en la combinación de la cinética molecular linealizada y las teorías hidrodinámicas. Para representación del comportamiento realista de los líquidos en contacto con sustratos sólidos, el fenómeno de histéresis del ángulo de contacto se tiene en cuenta imponiendo un mecanismo de anclado / desanclado consistente desarrollado en el marco del método de level-set. Aparte de los desarrollos principales, también se propone una técnica novedosa para la convección de la función ”level-set”. Ésta permite mejorar significativamente la precisión, minimizando a su vez la pérdida en las características geométricas de la interfaz asociadas al transporte. Esta nueva metodología está basada en el algoritmo de corrección de compensación de errores (BFECC). La herramienta numérica desarrollada en esta tesis es validada para varios casos que involucran burbujas de gas en un líquido y pequeñas gotas de líquido en un gas. Para el último escenario, además de las gotas libres, se evalúa la precisión de la herramienta propuesta para capturar la dinámica de las gotas sobre sustratos sólidos. A continuación, se analiza el rendimiento del modelo para capturar la configuración de una gota de agua sobre un sustrato inclinado en presencia de la histéresis del ángulo de contacto. El método propuesto finalmente se aplica
Enginyeria civil

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Lamine, Mohamed Sadok. "Multi-dimensional higher resolution methods for flow in porous media." Thesis, Swansea University, 2009. https://cronfa.swan.ac.uk/Record/cronfa42721.

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Currently standard first order single-point upstream weighting methods are employed in reservoir simulation for integrating the essentially hyperbolic system components. These methods introduce both coordinate-line numerical diffusion (even in 1-D) and cross-wind diffusion into the solution that is grid and geometry dependent. These effects are particularly important when steep fronts and shocks are present and for cases where flow is across grid coordinate lines. In this thesis, families of novel edge-based and cell-based truly multidimensional upwind formulations that upwind in the direction of the wave paths in order to minimise crosswind diffusion are presented for hyperbolic conservation laws on structured and unstructured triangular and quadrilateral grids in two dimensions. Higher resolution as well as higher order multidimensional formulations are also developed for general structured and unstructured grids. The schemes are coupled with existing consistent and efficient continuous CVD (MPFA) Darcy flux approximations. They are formulated using an IMPES (Implicit in Pressure Explicit in Saturation) strategy for solving the coupled elliptic (pressure) and hyperbolic (saturation) system of equations governing the multi-phase multi-component flow in porous media. The new methods are compared with single point upstream weighting for two-phase and three-component two-phase flow problems. The tests arc conducted on both structured and unstructured grids and involve full-tensor coefficient velocity fields in homogeneous and heterogeneous domains. The comparisons demonstrate the benefits of multidimensional and higher order multidimensional schemes in terms of improved front resolution together with significant reduction in cross-wind diffusion.

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Chen, Wei. "Theoretical study of multi-component fluids confined in porous media." Thesis, Lyon, École normale supérieure, 2011. http://www.theses.fr/2011ENSL0624.

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Un milieu poreux ou un matériau poreux comprend deux régions interconnectées : une perméable par un gaz ou un liquide et l’autre imperméable. Beaucoup de substances naturelles comme les roches, le sol et les tissus biologiques (par exemple, os, bio-membranes) sont poreuses ainsi que les matériaux manufacturés comme les ciments et les céramiques, etc. Les matériaux poreux ont des applications technologiques importantes et nombreuses, par exemple, comme tamis moléculaires, catalyseurs ou senseurs chimiques. Il existe un nombre très important d’études en expérience et en théorie pour comprendre la structure des matériaux poreux ainsi que les propriétés des substances confinées dans ces matériaux. Dans leur travail de pionnier, Madden et Glandt ont proposé un modèle très simple pour l’adsorption de fluide dans des milieux poreux désordonnés. Dans ce modèle, on forme la matrice en prenant une configuration figée instantanément d’un système à l’équilibre (“quench” en anglais) et puis un fluide est introduit dans une telle matrice. Récemment, T. Patsahan, M. Holovko et W. Dong ont généralisé la “scaled particle theory” (SPT) aux fluides confinés et obtenu ainsi des équations d’état analytiques pour un fluide de sphère dure dans plusieurs modèles de matrice. Dans un premier temps, j’ai développé la version de la SPT pour un mélange de sphères dures additives confiné en milieu poreux. Les expressions pour les valeurs au contact de différentes fonctions de distribution ont été obtenues également. J’ai effectué aussi des simulations de Monte Carlo. Les résultats de ces simulations sont utilisés pour valider les résultats théoriques. Ensuite, j’ai étudié aussi la séparation de phase d’un mélange binaire des sphères dures non additives confiné dans un milieu poreux. Pour obtenir l’équation d’état, nous avons utilisé une théorie de perturbation en prenant un fluide de sphères dures additive comme système de référence. Les résultats donnés par cette théorie sont en bon accord avec les résultats de simulation Monte Carlo
A porous medium or a porous material (called as frame or matrix also) usually consists of two interconnected rejoins: one permeable by a gas or a liquid, i.e., pore or void, and the other impermeable. Many natural substances such as rocks, soils, biological tissues (e.g., bio membranes, bones), and manmade materials such as cements, foams and ceramics are porous materials. Porous materials have important technological applications such as molecular sieve, catalyst, chemical sensor, etc. In recent years, there have been considerable investigations for understanding thoroughly the structure of these materials as well as the behavior of substances confined in them. Much effort (both experimental and theoretical) has been devoted to the study of porous materials. In their pioneering work, a very simple model for the fluid adsorption in random porous media was proposed by Madden and Glandt. The matrix in Madden-Glandt model is made by quenching an equilibrium system. Then, a fluid is adsorbed in such a matrix. Recently, T. Patsahan, M. Holovko and W. Dong have extended the scaled particle theory (SPT) to confined fluids and derived analytical equations of state (EOS) for a hard sphere (HS) fluid in some matrix models. In this thesis, using SPT method, I obtained the equation of state of additive hard-sphere (AHS) fluid mixtures confined in porous media. The contact values of the fluid-fluid and fluid-matrix radial distribution functions (RDF) were derived as well. The results of the contact values of the RDFs and the chemical potentials of different species were assessed against Monte Carlo simulations. Moreover, I analyzed also the fluid-fluid phase separation of non-additive hard sphere (NAHS) fluid confined in porous media. An equation of state is derived by using a perturbation theory with a multi-component fluid reference. The results of this theory are in good agreement with those obtained from semi grand canonical ensemble Monte Carlo simulations

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29

Yeates, Christopher. "Multi-Scale Study of Foam Flow Dynamics in Porous Media." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS023/document.

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Pour ce travail, nous utilisons un micromodèle à haute complexité et à structure fixe pour faire une série d’expériences en variant la vitesse d’injection, la qualité de la mousse, les distributions de taille de bulles d’injection, et la méthode d’injection. Nous mettons en œuvre un suivi individuel de bulles pour associer les propriétés d’écoulement aux propriétés de taille de bulles ainsi que les caractéristiques structurelles du milieu poreux. Nous proposons de nouveaux outils pour décrire l’écoulement d’un point de vue global et local de différentes manières. Nous établissons des comportements spécifiques à chaque taille de bulle, en montrant que les bulles des mousses piégées sont plus probables d’être de taille inférieure aux tailles de bulles moyennes, alors que les mousses en mouvement accèdent elles-mêmes à différents chemins d’écoulement selon les tailles de bulles. Les bulles plus volumineuses s’écoulent en majorité dans des chemins préférentiels à haute vitesse, généralement parallèles au gradient de pression, mais les petites bulles sont transportées en supplément à l’intérieur de chemins transversaux liant les chemins préférentiels. Ailleurs, pour nos données nous démontrons l’importance supérieure de la fraction de mousse piégée vis-à-vis de la densité de bulles quant à l’explication microscopique de la viscosité apparente, malgré une contribution des deux. Nous caractérisons structurellement les zones piégées à répétition, comme étant soit des zones à faible coordination de pore, de faible taille de seuil d’entrée, d’orientation de seuil désavantageuse, ou une combinaison de ceux-ci. Les zones à fort écoulement échappent à une caractérisation en termes de paramètres de structure locale et nécessitent une considération de l’information des différents chemins traversant la totalité du modèle. À ce but, afin de décrire les zones à fort écoulement, nous développons un modèle générant des chemins, utilisant une représentation en graphe du milieux poreux, basé sur une décomposition initiale en pores et seuils, qui intègre seulement les notions de taille de seuil et d’orientation de seuil relatif au gradient de pression pour caractériser les chemins
In this work, we use of a high-complexity micromodel of fixed structure on which we perform a series of experiments with varying injection rates, foam qualities, inlet bubble size distributions and injection methods. We perform individual bubble tracking and associate flow properties with bubble size properties and structural characteristics of the medium. We propose new tools describing the local and global flow in different ways. We establish specific behaviors for different bubble sizes, demonstrating that trapped foams are more likely to have smaller than average bubble sizes, while flowing bubbles also tend to segregate in different flow paths according to bubble size. Larger bubbles tend to flow in high-velocity preferential paths that are generally more aligned with pressure gradient, but smaller bubbles tend to access in supplement transversal paths linking the different preferential paths. Furthermore, for our data we establish the pre-eminence of the trapped foam fraction over bubble density within the microscopic explanation of apparent viscosity, although both contribute to some degree. We structurally characterize consistently trapped zones as areas with either low pore coordination, low entrance throat size, unfavorable throat orientation or a combination thereof. High-flow zones however cannot be characterized in terms of local structural parameters and necessitate integration of complete path information from the entire model. In this regard, in order to capture the high-flow zones, we develop a path-proposing model that makes use of a graph representation of the model, from an initial decomposition into pores and throats, that uses only local throat size and throat orientation relative to pressure gradient to characterize paths

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Yang, Jianhui. "Multi-scale simulation of multiphase multi-component flow in porous media using the Lattice Boltzmann Method." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18928.

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This thesis consists of work mainly performed within the Qatar Carbonates and Carbon Storage Research Centre (QCCSRC) project, focusing on the prediction of flow and transport properties in porous media. The direct pore scale simulation of complex fluid flow on reservoir rocks is the main topic of this work. A simulation package based on the lattice Boltzmann method has been developed to study single and multiphase flow as well as thermal and solute dispersion in porous media. The simulator has been extensively validated by comparing simulation results to reference solutions. Various numerical experiments have been performed to study the single/multiphase/solute dispersion flow in reservoir rocks. The simulator successfully predicts various transport properties including single phase and relative permeability, capillary pressure, initial-residual saturation, residual cluster size distribution and dispersion coefficient. The prediction has been compared to available experimental data and was generally found to be in good agreement. The simulator is also ready for exploring the two-phase dynamic problem with coupled and nonlinear physical processes including the effect of wettability, surface tension and hysteresis. To improve the efficiency of the lattice Boltzmann simulations, an optimised collision model and corresponding parallel operation are proposed and implemented. A sparse storage scheme which significantly reduces the memory requirement has been designed and implemented for complex porous media. Due to the application of these optimisation schemes, it is possible to perform simulations on large scale samples (Size >1024x512x512). The optimised code shows very good and promising performance, and nearly ideal scalability was achieved.

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Hron, Pavel [Verfasser], and Peter [Akademischer Betreuer] Bastian. "Numerical Simulation of Multi-Phase Multi-Component Reactive Flow in Porous Media / Pavel Hron ; Betreuer: Peter Bastian." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180500148/34.

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Kowalczuk, Jacques. "On the design and implementation of algorithms for multi-media systems /." [S.l.] : [s.n.], 1994. http://library.epfl.ch/theses/?nr=1188.

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Bruneau-Queyreix, Joachim. "Multi-Criteria Optimization of Content Delivery within the Future Media Internet." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0745/document.

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Les solutions de streaming vidéo adaptatives basées sur l’utilisation du protocol HTTP ont été largement plébiscitées dans les mondes de l’industrie et de la recherche, notamment pour les possibilités d’améliorations de qualité d’experience qu’elles offrent ainsi que pour leurs facilités de déploiement liées au protocol HTTP. Pour autant, bien que ces solutions permettent d’augmenter la qualité d’experience utilisateurs en diminuant la qualité de la vidéo transmise sur les réseaux pour minimiser les interruptions vidéo liées au temps de chargement, la qualité intrinsèque de la vidéo est limitée par les capacités physiques du chemin entre le serveur utilisé et le client. Dans l’objectif d’augmenter la qualité d’experience utilisateurs et de diminuer les couts de déploiements des services de streaming, les travaux de cette thèse de doctorat proposent de faire évoluer de façon pragmatique les solutions de streaming adaptatives actuelles vers l’utilisation en simultané de plusieurs sources (serveurs ou pairs). La première contribution de cette thèse présente MS-Stream, une technique évolutive de streaming adaptatif basé sur HTTP et utilisant plusieurs serveurs simultanément. MS-Stream offre la possibilité d’exploiter la bande passante disponible dans les infrastructures distribuées et les réseaux hétérogènes. La deuxieme contribution de ce document est MATHIAS, un groupe d’algorithmes d’adaptation centrés client, implémentés dans MS-Stream, qui a pour vocation d’optimiser l’utilisation des ressources réseau hétérogènes mises à disposition du client pour obtenir une qualité vidéo cible. MATHIAS permet à chaque client de controller le nombre de serveur utilisé en simultané, de faire face à l’hétérogeneité des resources disponibles, de réagir aux fluctuations soudaines et non-anticipées des capacités des serveurs tout en donnant à l’utilisateur une experience de streaming ininterrompu. Pour finir, nous allons plus loin dans les capacités de scalabilité et de qualité d’experience de MS-Stream et MATHIAS en tirant profit des ressources physiques des consommateurs. Nous proposons une solution hybride pair-à-pair/multi-server de streaming adaptative: PMS. Au sein de PMS, les logiques d’adaptation de la qualité vidéo et de la scalabilité sont distribuées pour permettre à chaque client de tendre vers une utilisation optimale de l’infrastructure de streaming
Single-source HTTP Adaptive Streaming solutions (HAS) have become the de-facto solutions to deliver video over the Internet mostly due to their capabilities to increase end-user’s Quality of Experience (QoE) as well as their ease of deployment due to the usage of the HTTP protocol. Although HAS solutions can increase QoE by trading off the delivered video quality to minimize the number of video freezing events, they are limited by the bandwidth available on the considered communication channel between the client and the server. This thesis exposes our contributions in building lightweight pragmatic and evolving solutions advocating for the simultaneous usage of multiple sources with heterogeneous capacities so as to achieve high QoE content delivery at low cost. The first contribution of this work presents a streaming solution extending HAS capabilities to a pragmatic multi-server technique: MS-Stream. MS-Stream provides the means to exploit expanded bandwidth and link diversity in distributed heterogeneous network infrastructures. In our second contribution, we propose MATHIAS, a client-side two-phase consumption and adaptation algorithm implemented into MSStream. MATHIAS aims at increasing the end-user’s perceived streaming quality while utilizing the most of the heterogeneous capacities offered at the service and network environments. Finally, we further extend the QoE and scalability capabilities of MS-Stream and MATHIAS by leveraging on clients’ connectivity capacities and we expose our third contribution: a hybrid P2P/Multi-server live-Streaming system (PMS) incorporating distributed quality and scalability adaptation mechanisms

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Dressler, Marc. "Theoretical and experimental modeling of ultrasonic waves in multi-layered media." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/21535.

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Marskar, Robert. "Few- and Single-Cycle Coherent Pulse Propagation in Multi-Level Media." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25418.

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Recent experimental realizations of single-cycle pulses in the terahertz, infrared, and optical regions provide promising light sources for applications in telecommunication, medical imaging, spectroscopy, and coherent control. In the resonant regime, the short duration of such pulses imply that they may escape certain effects that are detrimental to coherence; spontaneous emission is one such example. In combination with an octave-spanning spectral bandwidth, an adequate theoretical approach necessitates a semiclassical coherence model outside the conventional few-level, rotating wave, and slowly varying envelope approximations. The evolution equations that govern the underlying dynamics of such systems are inherently nonlinear and possess solutions only in certain idealized, limiting cases. In this thesis we investigate the viability of obtaining general-purpose numerical solutions to such problems. A computational approach based on Maxwell’s equations coupled with a multi-level quantum mechanical model for homogeneously and inhomogeneously broadened media is reported. The formulation leads to a numerical algorithm applicable to bi-directional propagation of pulses of arbitrary duration along all three spatial coordinates. For sufficiently dense inhomogeneously broadened materials we show, numerically, that when the forward propagation approximation of Maxwell’s wave equation is not valid, certain types of optical solitons may lose a significant amount of energy with increasing propagation distance through the co-excitation of a backward mode. A second set of computational routines is based on neglection of optical backpropagation in Maxwell’s wave equation. The resulting propagation equation generalizes the paraxial wave equation to the single-cycle pulse regime and is shown to be susceptible to numerical integration in conjunction with quantum theory. Our computer code is applied to femtosecond conical emission in atomic sodium. We find that cone emission occurs together with spatiotemporal pulse breakup analogous to the soliton-type splitting observed in self-induced transparency. We furthermore support these results by presenting complementary numerical calculations of the same phenomenon in the picosecond pulse regime. The angular structure of the conical emission observed numerically agrees with expermental measurements performed by others. Our computational results resolve some of the underlying questions surrounding conical emission in alkali metal vapors. Consideration of optical selection rules in rigid-rotor molecules is shown to greatly simplify the numerical evaluation of single-cycle pulse propagation in multi-level molecular systems. Numerical application of linearly polarized single-cycle terahertz pulses in rigid rotor molecular media, incorporating a full rotational manifold, shows that coherent bleaching effects ultimately lead to self-steepening of the driving pulse. A possible practical consequence of these results is that coherent, nonlinear saturation effects may partially cancel dispersion-induced temporal broadening of single-cycle pulses, opening up the possibility of increased energy transmission of terahertz pulses through molecular media.

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Sederman, Andrew John. "MRI studies of single and multi-phase flow in porous media." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624232.

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Sozen, Mehmet F. "Transient, non-thermal equilibrium, multi-phase transport processes in porous media /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487672631599077.

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Niessner, Jennifer [Verfasser]. "Multi-scale modeling of multi-phase-multi-component processes in heterogeneous porous media / Institut für Wasserbau der Universität Stuttgart. Vorgelegt von Jennifer Niessner." Stuttgart : Inst. für Wasserbau, 2006. http://d-nb.info/981609406/34.

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El-Tahan, Samir, and Daniela Poblete. "Social media use in B2B context : A multi-case study on the use of social media by B2B companies." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-65203.

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In the past decade, there has been a transformation in how businesses are done, many business chose to adopt digitization and others were forced to go with the flow. As a part of this digital revolution, social media has reserved a big share of this transformation in how companies do their marketing and communicate their product and brand image to their customers. Social media in a business to customer context has been very common since the birth of social media, companies had realized its benefit, and however, it is still in an early phase in a business to business context. Social media has become an effective marketing tool for B2B companies, yet, there are still drawbacks when companies fail to know how to use such platforms to their benefit and merely have a shy presence or do not have a well-defined strategy to the use of social media in the most effective way. A vital step when incorporating social media in marketing is to create a clear goals and metrics. However, it has been seen that many companies lack the expertise, resources and the know-how, to implement a social media marketing strategy. Therefore, the purpose of this study is to explore the practices of B2B companies when they use social media without a clearly defined social media marketing strategy, what they do when they use social media.

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Wagner, Sarah. "A multi-sited ethnography of the decolonization of mobile media among Guaraní." Doctoral thesis, Universitat Oberta de Catalunya, 2020. http://hdl.handle.net/10803/668810.

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Els moviments de drets indígenes d'Amèrica Llatina lluiten contra les hegemonies colonials que impregnen la vida contemporània. Mitjançant l'anàlisi particular dels pobles guaranís i les seves estratègies avançades, aquesta tesi aporta les primeres evidències sobre les implicacions de la descolonització dels serveis de comunicació mòbil. La tesi se centra en la política de les formes de comunicació interpersonal, un tema habitualment oblidat en els estudis sobre mitjans de comunicació indígenes. Adopta un enfocament crític i multilocal que combina la col·laboració comunitària amb l'anàlisi d'economia política. Els resultats comminen a qüestionar els discursos tecnooptimistes de la inclusió digital i a analitzar com la desigualtat condiciona la influència cívica sobre els mitjans. Cal destacar les connexions que aquesta tesi estableix entre factors clau que afecten la capacitat individual de decidir (o agència individual) sobre els serveis mòbils en el cas de les anomenades "perifèries digitals".
Los movimientos de derechos indígenas de América Latina luchan contra las hegemonías coloniales que impregnan la vida contemporánea. Mediante el análisis particular de los pueblos guaraníes y sus estrategias avanzadas, esta tesis aporta las primeras evidencias sobre las implicaciones de la descolonización de los servicios de comunicación móvil. La tesis se centra en la política de los modos de comunicación interpersonal, un tema habitualmente ignorado en los estudios sobre medios de comunicación indígenas. Adopta un enfoque crítico y multilocal que combina la colaboración comunitaria con el análisis de economía política. Los resultados conminan a cuestionar los discursos tecnooptimistas de la inclusión digital y a analizar cómo la desigualdad condiciona la influencia cívica sobre los medios. Destacan las conexiones que esta tesis establece entre factores clave que afectan a la agencia o capacidad individual de decidir sobre los servicios móviles en el caso de las llamadas "periferias digitales".
Indigenous rights movements in Latin America are fighting to overturn the colonial hegemonies that continue to pervade contemporary life on the continent. The Guaraní people, for instance, have devised advanced strategies to decolonize mobile media services through local ownership. While most research on indigenous media focuses on the activities of organizations and the nature of media content, this thesis draws attention to the politics surrounding indigenous people's means of interpersonal communication and provides unprecedented evidence regarding the implications of decolonizing mobile media services. The results of this research, which adopts a critical, multi-sited approach that combines community-based collaboration with an analysis of the political economy, compel us to question the techno-optimism inherent to digital inclusion discourse and to further explore how inequalities shape civic influence on the media. Most significantly, this research ties together key factors that affect the individual agency of those at the so-called "digital margin" over their mobile media services.

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Chen, Yun Ru. "Reconstructing Macau identity :a multi-media exhibition project of Macau's communication memory." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3690753.

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Yen, Lee Chun, and 李春燕. "The Effective Multi-user and Multi-media Interaction." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/44727649788300360067.

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碩士
國立高雄師範大學
資訊教育研究所
92
This study is conducted on a distance learning platform, named “Multi-user and Multi-media Interaction with Reflection and Grouping (MMRG) System” designed by professor Wu-Yuin Hwang and his student Tzong-Ying Ho. Though the interactive function of MMRG is powerful, its requirements for network bandwidth and multimedia equipment are very low. Learners can choose their favorite on-line file to browse or to compose on-line files in the MMRG, so they can control their own learning pace well. It is necessary to overcome the problem of multi-users’ voices mingled together and message overloading in multi-user and multi-media interaction system. The MMRG presents two mechanism of “store-notify-click” and “grouping discussion” that like to solve the problems and they works. To study the effects of MMRG on the interaction process of learners, an on-line experiment was conducted through participation and observation. After the experiment, some questionnaires were distributed and interviews were conducted. The statistical result of data analysis shows that the learners are very satisfied and they enjoyed the interactive mechanism. Specifically, many of them tend to pay more attention to web-based learning after the experiment. It demonstrates the powerful effect of MMRG as an on-line interaction mechanism.

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Meenaksisundarm, K. S. "Multi-media approach for agricultural development." Thesis, 1996. http://hdl.handle.net/2009/3574.

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薛慶琪. "I’MPERFECT. -An Experimental Multi-Media Presentation." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/g26429.

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碩士
國立政治大學
廣播電視學系
104
This presentation is based on the author’s own experience, trying to solve the inherent anxiety as creative motivation and image a statement from the perspective of the third person who has lost her father, expressing individual subjects of perceived self-identity transition and the continuity of mood changes experienced along the way. This presentation is created to express the purest feelings of author, and hope to bring a power to the audience who have similar experiences through seeing this presentation. This presentation is composed by three experimental films, which presented by an actor performing body language to stand for one’s inside heart with Fabricated Photography, and supplemented by nature scenes and animals’ lenses to reconstruct and convey three-stage manner formula and abstract mood scene. When it comes to public performance, this presentation is designed to use video arts mode according to the characteristics of the exhibition space and three films, combined with works of Fabricated Photography and the narrative of the exhibition, with the intention that the audience can feel the narrative way as the author, starting from the emotional “rottenness” stage to the self struggle transition “chaos”, finally coming to the process “rebirth” of life’s journey. From the results of two public performances, the majority of the audience still prefer to narrative contexts by words rather than images although they can clearly receive the creative theme from three experimental films. “Another way of telling "of images doesn’t work independently in this presentation as imagined. Also, the interaction of exhibition space and videos mode will affect the audience the interpretation and emotional projection to the films, thus the films need to make appropriate adjustments based on the exhibition narrative in post- production editing stage. Finally, according to interviews and questionnaires of the audience, it shows the effectiveness and production review of this presentation, hoping to provide relevant suggestions for subsequent creators of this similar theme.

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Chen, Wei, and 程偉. "Storage Design for Multi-Media Data." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/40466018118768179267.

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碩士
國立交通大學
資訊工程研究所
82
In recent years, multimedia is the hottest topic in the computer field due to users' requirements and the development of hardware technology. Various multimedia data such as video, audio are dig- itized and need to be stored on secondary storage devices with huge storage capability. CD-ROM becomes more popular owing to its lower cost and huge storage capacity. In this thesis, we will fo- cus on some applications like CD- ROM title, hypermedia system. Since the data stored in CD-ROM disc will be placed in a linear order form, we want to find such a linear order with minimum acc- ess cost. We will propose mechanisms to find such a linear order for solving the global placement problem. We will also propose a method to locally store these multimedia data in the form that satisfy the continuity and synchronization requirements with min- imum read ahead time and buffer space. We perform simulations and verify that proposed methods are correct and effective.

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Chen, Hung-Ming, and 陳宏明. "Integrated multi-function voice media center." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/43714248864555327057.

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碩士
南台科技大學
電子工程系
94
Nowadays, the Multi-function Technologies all take the single or a few technologies as the foundations of them. Nevertheless, the Integrated Multi-function Technologies have become a new and hot technology in this field. Therefore, the research focus on this paper is to integrate a lot of functions into the voice media center becoming a multi-function voice media center. MELP and ADPCM will be applied into the audio function; many VOIP protocols are taking parts in the communication function. VOIP is the main communication method in the multi-function voice media center. VOIP all take H.323 as their principles. But the core elements of the multi-function voice media center are protocols for audio, communication, and compression. Therefore we use the SIP (Session Initial Protocol) as the main protocol. We have completed the following functions and reached the goals below: 1. Improve the communication quality; the systems can operation more than one multi-media functions at the same time. 2. Improve the distortion condition in Analog Transmitting. 3. Integrated the functions of computer and telephone into the multi-media. 4. Integrated the function of Analog and Digital communication.

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Ting, Yi-Ting, and 丁奕廷. "Fairness Mechanism for Multi-rate Multi-media Communication in 802.11e." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/30647566215636800421.

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碩士
國立交通大學
電信工程研究所
101
The IEEE 802.11e Enhanced Distributed Channel Access (EDCA) provides a class-based differentiated quality of service (QoS) to IEEE 802.11 WLANs. But since EDCA mechanism only takes single-rate network environment into account, when it equipped in the multi-rate network it can’t function well. That’s because the 802.11e standard provide time fairness among the high priority access category which may influence the QoS performance of the low speed users. And among the low priority access category, 802.11e provides same probability of channel access to all users. That means when the users are transmitting large frame, the low-rate users will occupy more channel slots then the high-rate users do. This characteristic not only causes the compression to the channel transmission time of the high-rate users but also affect the total system throughput of the network. Regarding of the defect above, we propose a new fairness mechanism for two purposes: 1. Reducing the transmission time of the low speed non-QoS users to enhance the total throughput. 2. Providing same bandwidth guarantee to all QoS requirement stream regardless of the user’s transmission rate. Finally, we simulate the improvement between new fairness mechanism and original EDCA function.

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Subramanian, Selvakumaran N. "Traffic modeling in a multi-media environment." Thesis, 1996. http://spectrum.library.concordia.ca/6256/1/MM18446.pdf.

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Liu, Chao-Jen, and 劉超仁. "Multi-media Playback System Design and Implementation." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/30787318694377556208.

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碩士
國立交通大學
資訊學院資訊學程
100
As the mature technological progress, provide internet sharing is popular and easy. At the same time, there are many smart phones, multi-media players, cameras or other personal handheld devices that bring more and more multimedia files or types (audio and video) .These complicated applications cause to design different encoding or compression in order to satisfy every kind of demand.. But, the playback device that user already had maybe can’t play. Therefore, student wants to design multi-media playback system through software update that can provide the easier and cheaper solution

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50

YUEH, TSU-HAO, and 樂祖豪. "The Production of Multi-media Instructional Material." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/77213866078751114380.

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Abstract:

碩士
亞洲大學
資訊傳播學系
104
Most IT professional books sold in the market are reference books for self-learners learning software such as Photoshop, Flash and 3D Max, etc. These books might be somewhat helpful for teaching and learning but they are not ideal instructional materials for teachers. The main purpose of this study is to edit an instructional textbook for teachers in teaching iClone and Mimir APP, both of which are important topics for multimedia courses in Taiwan. iClone is a platform for rapid creation of 3D character creation, and Mimir APP is an interactive multimedia e-book creation platform. Both iClone and Mimir APP were created by Taiwan's engineering teams who worked hard and continued to improve these two instruments. In addition, the study also investigates senior high school teachers’ textbook use and training programs.

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Dissertations / Theses on the topic 'Multi-media'

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