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In a sensor monitoring embedded computing environment, the data from a sensor is an event that triggers the execution of an application. A sensor node consists of multiple sensors and a general purpose processor that handles the multiple events by deploying an event-driven software model. The software overheads of the general purpose processors results in energy inefficiency. What is needed is a class of special purpose processing elements which are more energy efficient for the purpose of computation. In the past, special purpose microcontrollers have been designed which are energy efficient for the targeted application space. However, reuse of the same design techniques is not feasible for other application domains. Therefore, this thesis presents a power-aware dataflow processor architecture targeted for the electronic textile computing space. The processor architecture has no instructions, and handles multiple events inherently without deploying software methods. This thesis also shows that the power-aware implementation reduces the overall static power consumption. / Master of Science

General purpose microcontrollers have been used as computational elements in various spheres of technology. Because of the distinct requirements of specific application areas, however, general purpose microcontrollers are not always the best solution. There is a need for specialized processor architectures for specific application areas. This thesis discusses the design of such a specialized processor architecture targeted towards event driven sensor applications. This thesis presents an augmented multibus dataflow processor architecture and an automation framework suitable for executing a range of event driven applications in an energy efficient manner. The energy efficiency of the multibus processor architecture is demonstrated by comparing the energy usage of the architecture with that of a PIC12F675 microcontroller. / Master of Science

Habilitation à diriger des recherches : Automatique et Informatique industrielle : Lille 1 : 2003. / N° d'ordre (Lille 1) : 395. Curriculum vitae. Bibliogr. p. 124-128. Liste des publications.

WARP and WEFT is a textile making guild, intricately woven into KNOOP, the proposed Clothing and Consumer Science building for the University of Pretoria. This building is situated in Hatfield next to the railway line, in close proximity to the Gautrain station and Rissik Station. KNOOP was designed in 2008 by Korine Stegmann in fulfilment of her MArch(Prof) at the University of Pretoria. Therefore, the building in which the intervention is proposed is, to date, only an architectural proposal and has not yet been built. The project was initiated due to a fascination with textiles and the relevance of textiles in interior architecture. This fascination with textiles is ascribed to the following: The first intriguing aspect of textiles is the structure and the underlying construction principles of textiles. The second aspect is the unique character of textiles compared to other building materials. Another interesting notion is the current international textile trend and current re-focus on textiles as a construction material after a long period of being neglected. The current hype about textiles is ascribed to the tactile qualities of textiles, which opposes an increasing movement towards virtualism. The raw and organic production process of handmade textiles is desirable and opposes automated production. Similarly to the Arts and Crafts movement, designers are once more interested in handmade products. Fourthly, textiles used in architecture has the intriguing ability to create an architecture which better relates to fashion in terms of fashion’s ability to easily change and adapt; fashion’s fleeting nature. Lastly, handmade textiles of a specific region have the ability to convey the identity of that specific region. This is a crucial ability to resist globalization and monotony in cultural identity. Appropriately, the fascination of this dissertation is with traditional African handmade textiles and its relevance in interior architecture. The contemporary unbuilt building was selected to demonstrate the value of a collaborative approach between an architect and interior architect prior to construction. The analysis of the architectural proposal shows that the interior architect can effectively recognize the strengths and weaknesses of a building from an interior perspective and enhance and improve these aspects. The aim is also to show that two programmes can function collaborative in one building and that intervention is possible within a building with a fixed programme. The site was selected due to the location and framework it falls within. The location of the site allows for exposure due to the pedestrian demand on the site. Also, the site is advantageously located within close proximity to main transportation nodes. The site falls within the extended Arcadia Arts and Cultural Corridor. The vision for this corridor is a lively and multicultural precinct which hosts a variety of arts and cultural facilities. The vision for these facilities is to portray the zest of local culture, especially to those disembarking the Gautrain. The textile making guild, WARP + WEFT is an important project within this precinct, due to the core concept of the guild to celebrate African textiles. The aim of the guild is to produce contemporary woven textiles which portray the identity of traditional African woven textiles. The vision for WARP + WEFT within the precinct is to exhibit textiles, expose the textile making processes and to create a unique African textile experience for both the public and the users of the guild. The interior intervention will celebrate African textiles by demonstrating how textiles are used to solve and embrace aspects identified through the analysis of the architectural proposal. These aspects include acoustic absorption, solar screening, adding softness, texture and colour to an environment predominantly defined by cold, hard, smooth and monotone surfaces, as well as providing versatile branding elements. The use of textiles in the interior intervention introduces the unique design question of how to design with textiles for a textile related programme, opposed to textiles being used for another programme, such as a theatre or a hotel. It is a matter of “textiles for textiles” instead of “textiles for music” or “textiles for sleeping”. The solution to this unique design problem is to differentiate between spaces which celebrate textiles by acting as a background or blank canvas for the exhibition and production of textiles and spaces which celebrate textiles by becoming textile-like. To create these spatial variations, the exclusive use of textiles is not sufficient. Textiles need to be translated into interior architecture which will be achieved through the following five methods: Translation through metaphor, translation through structure, interpretation of actual textiles, engagement through text and the translation of the unique qualities of textiles. Thus, the aim of the investigation is to celebrate textiles through the application of textiles and through the translation of textiles in interior architecture. / Dissertation MInt(Prof)--University of Pretoria, 2012 / Architecture / MInt(Prof) / Unrestricted

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Graphene is a two-dimensional carbon based material with unique properties, such as electrical and thermal conductivity. When a textile is coated with graphene, it becomes conductive, while remaining low weight, soft, breathable, flexible, and stretchable. The purpose of this thesis is to investigate what products are suitable to be made with graphene textiles, by using the method Material Driven Design (MDD). Reflections are also made to determine how this method is affected by being applied to a two-dimensional material. To help with this, three kinds of graphene textiles from the company Grafren AB are investigated; conductive textiles, heatable textiles, and textile sensors. The product goal is to develop a portfolio containing 5-8 conceptual products based on these graphene textiles. The process includes conducting an investigation of the technical properties of the material, a user study, and a benchmarking study. This is done to understand the limitations and opportunities of the material, how it is perceived, and what similar materials there are on the market. After that, the material's characteristics are reflected upon to establish a vision for how it should be used in future applications. Then, to follow that vision, a user study is conducted to investigate how people perceive different materials and products, in order to create design guidelines to ensure that the material and product are perceived as intended. Next, concepts are developed according to the previously determined guidelines. To achieve this, idea generating workshops are conducted, where 14 concepts are selected for further development. The portfolio is then created, meant to inspire further usage of the material. It contains the following seven concepts. A heatable textile meant for cooking on camping trips. A fabric containing sensors that can notify when it is damaged. A keyboard made of fabric, for an easy and comfortable use and transportation. A stroller with sensors and heaters, for a more comfortable and safe user experience. A conductive jacket that can electrocute mosquitoes that come in contact with it. Pressure sensors in a carpet that can keep track of the people inside and provide assistance in emergencies. Gloves with sensors in them that can translate sign language live to text or speech. Since MDD heavily focuses on the sensorial qualities and physical characteristics of the material, the method needs to be adapted to become useful when working with such a versatile two-dimensional material. Fortunately, most adaptations can be made fairly easily. The timing of each step should also be considered, to ensure that the vision and guidelines can be made specific enough to be useful.

Reproduction de : Habilitation à diriger des recherches : Sciences physiques. Automatique et informatique industrielle : Lille 1 : 2006. / N° d'ordre (Lille 1) : 545. Titre provenant de la page de titre du document numérisé. Bibliogr. p. 82-85. Liste des publications et communications.

La globalización ha permitido el desarrollo industrial en todo el mundo; sin embargo, ha originado un perjuicio a la naturaleza generando diferentes problemas como el cambio climático. Por tal motivo, en los últimos años, se ha iniciado una concientización por el cuidado del medio ambiente que involucre a las personas y empresas. El sector textil, considerado como una de las industrias que genera mayor impacto, se ha sumado a dicha iniciativa para disminuir el efecto negativo. Para lograr tal fin, se empezó a utilizar fibras naturales para la elaboración de sus confecciones, debido a que reduce el uso de químicos y el consumo de agua en la producción. La industria de la moda se ha beneficiado con la implementación de las fibras naturales, ya que ha incrementado el valor de sus textiles. Esto se ve reflejado en el valor de las importaciones de prendas, de punto y de plano elaboradoras con lana o pelo fino, que han experimentado una tasa de crecimiento promedio anual de 2.7% desde el año 2012. Este beneficio favoreció a empresas de diferentes países, principalmente de Italia, que es considerado una nación que marca tendencia y ha tenido un crecimiento promedio anual de 7.28% en sus exportaciones. La fibra más recurrente es la de alpaca, debido a que es hipoalergénica, posee diferentes tonalidades de colores y es versátil para elaborar diferentes confecciones. Esta fibra se adquiere principalmente en el Perú, por poseer alrededor de 4 millones 350 mil camélidos. Esto ha permitido que el Perú desarrolle una industria para exportar la fibra tan cotizada y sea considerado como el proveedor número uno. Los mercados principales que compran al país son China, Taiwan e Italia, destacando este último por ser el principal comprador que adquirió fibras valoradas en 28.4 millones de dólares en el 2019. Esta industria alpaquera es una fuente de ingreso para el país; no obstante, se requiere el desarrollo de nuevas líneas productivas que permitan ampliar la capacidad de producción y distribuir los beneficios económicos, ya que actualmente, el 80% se concentra en Arequipa. El presente estudio contempla el análisis de prefactibilidad para la implementación de una empresa industrial dedicada a la producción y exportación de fibra de alpaca a Italia. El producto del proyecto tiene alta aceptación en el mercado italiano y se producirá en Huancayo, Junín. El proyecto requiere una inversión total de S/610,161 de los cuales el 59.29% será financiado a través de préstamos. Por último, se calcula la viabilidad económica y financiera del proyecto, obteniendo valores positivos para el proyecto, con un VAN económico y financiero de S/385,718 y S/396,227 respectivamente; mientras que las tasas internas económicas y financieras de retorno (TIRE y TIRF) son de 35.25% y 45.08%, valores que superan los 17.56% y 17.44% correspondientes al WACC y COK. Estos valores permiten concluir que la realización del proyecto es viable.

Call number: LD2668 .T4 1959 K37