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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Effektivitet genom kollaboration: En studie i hur metoder för kollaboration kan användas i agila designprocesser

Fredlund, Isak January 2016 (has links)
Denna uppsats utforskar hur en agil designprocess kan effektiviseras i form av tid genom att applicera metoder för kollaboration. Kraven i form av tidsåtgång, kostnad och kvalité på vad som framställs är påtagliga och mäts på olika sätt. För att möta kraven förlitar sig det agila arbetssättet, framförallt inom design, ofta på en expertis hos utövaren. Det kräver en ingående kunskap och som medför att involveringen av slutanvändare och kunder i fall kan blir lidande. Min teoretiska efterforskning gav mig en bild av att agila designprocesser idag är och tillåts vara väldigt utdragna. För att skapa en förståelse för hur en modern designprocess praktiseras har jag utfört undersökande fältstudier i form av kvalitativa intervjuer med företagen Cybercom och TOPP. Dessa intervjuer gav mig insikten av vad som finns och vad som efterfrågas av brukande designers, vilka har format min designprocess och mitt praktiska utformande som består av två prototyper i form av två olika arbetssätt, ett agilt och ett kollaborativt. Genom att ha utformat arbetssätten på ett specifikt sätt har jag lyckats jämföra resultaten av de båda och kunnat argumentera och presentera ett förslag på ett mer effektivt arbetssätt i form av tid, kostnad och kvalité där de positiva aspekterna från de olika arbetssätten applicerats.
152

A High-end Reconfigurable Computation Platform for Particle Physics Experiments

Liu, Ming January 2008 (has links)
Modern nuclear and particle physics experiments run at a very high reaction rate and are able to deliver a data rate of up to hundred GBytes/s.  This data rate is far beyond the storage and on-line analysis capability. Fortunately physicists have only interest in a very small proportion among the huge amounts of data. Therefore in order to select the interesting data and reject the background by sophisticated pattern recognition processing, it is essential to realize an efficient data acquisition and trigger system which results in a reduced data rate by several orders of magnitude. Motivated by the requirements from multiple experiment applications, we are developing a high-end reconfigurable computation platform for data acquisition and triggering. The system consists of a scalable number of compute nodes, which are fully interconnected by high-speed communication channels. Each compute node features 5 Xilinx Virtex-4 FX60 FPGAs and up to 10 GBytesDDR2 memory. A hardware/software co-design approach is proposed to develop custom applications on the platform, partitioning performance-critical calculation to the FPGA hardware fabric while leaving flexible and slow controls to the embedded CPU plus the operating system. The system is expected to be high-performance and general-purpose for various applications especially in the physics experiment domain. As a case study, the particle track reconstruction algorithm for HADES has been developed and implemented on the computation platform in the format of processing engines. The Tracking Processing Unit (TPU) recognizes peak bins on the projection plane and reconstructs particle tracks in realtime. Implementation results demonstrate its acceptable resource utilization and the feasibility to implement the module together with the sys-tem design on the FPGA. Experimental results show that the online track reconstruction computation achieves 10.8 - 24.3 times performance acceleration per TPU module when compared to the software solution on a Xeon2.4 GHz commodity server. / QC 20101118
153

Innovations and Improvisations: A study in specialized product development focused on business clothing for women with physical disabilities

Carroll, Katherine E. 05 April 2002 (has links)
Clothing manufacturers and distributors in the current business climate need to become more flexible and willing to adapt to consumers' changing needs and preferences in order to satisfy the market (Kincade, 1995). Clothing consumers who have special needs, such as working women with physical disabilities, comprise a group who would benefit from research into specialized products focused on a small target market (Reich & Otten, 1991). However, research shows that consumers with physical disabilities do not want to be treated as a specialized group, but the same as any other consumer group (Freeman, Kaiser & Wingate, 1986). The concept of Universal Design, typically applied to spatial and product design, provides a framework within which an item of clothing could be produced to satisfy many consumers, regardless of their physical ability. If a universally-designed clothing product can be successfully produced and marketed to many types of consumers, potential benefits could exist for manufacturers, distributors and consumers. The dissertation topic originated from the researcher's questioning the lack of easily accessible ready-to-wear clothing for consumers with physical disabilities, and was based on preliminary conversations with a few working women who encountered difficulty finding business clothing that was both functional and visually appealing. Considerable needs assessment research had already been completed in the clothing/disability area using data collected from small samples of subjects with disabilities similar in nature, but none had extended the research to include the opinions of clothing manufacturers and distributors of end-use products. The researcher envisioned a study that would encompass all parties involved in decision-making processes for a clothing product. The qualitative research process employed multiple data collection and analysis strategies in two Phases. In Phase A, detailed information was obtained about the physical limitations, clothing needs and preferences, and clothing acquisition preferences from a group of nine working women with various upper body limitations. A prototype for an upper body garment suitable for working situations was developed and wear-tested with the original group, and with a group of working women (n=6) without any known physical limitations. The second part of the study, Phase B, consisted of semi-structured interviews with clothing industry personnel (n=6) relating to issues involved in manufacturing and distributing the prototype within the existing ready-to-wear system. A framework for manufacturing clothing for a specific target market was explored and revised in the study. The framework demonstrated the need for in-depth user information to generate ideas for the study, and included an industry feasibility component in order to assess not only consumer but also industry issues. Both the principles of Universal Design and a framework for systemic change in the current business methodology acted as guideposts at various steps of the process. Results indicated that (a) a clinical definition of disability is not needed to collect user information for clothing product development, rather a categorization of disability's effect on the body can be used; (b) working women with a variety of disabilities can have similar clothing needs and preferences; (c) Universal Design can be a successful strategy for clothing product development; (d) constricting styles and fastenings present the greatest clothing problems regardless of subjects' disabilities; (e) a universally-designed clothing product can be visually appealing, functional, and easily manufactured within the existing clothing system; (f) marketing the product will prove to be the most challenging aspect of putting this product into the ready-to-wear system; and (g) although other distribution channels exist, consumers with physical disabilities prefer to use existing brick-and-mortar retail stores to shop for their clothing. The researcher concluded that although the product development process used in this study was successful, more work could be done with clothing manufacturers and distributors to encourage them to consider this target market, and to use Universal Design as a strategy that can be applicable to all consumers, regardless of their physical abilities. / Ph. D.
154

Using experience-based co-design with patients, carers and healthcare professionals to develop theory-based interventions for safer medicines use

Fylan, Beth, Tomlinson, Justine, Raynor, D.K., Silcock, Jonathan 29 June 2021 (has links)
Yes / Background: Experience-Based Co-Design (EBCD) is a participatory design method which was originally developed and is still primarily used as a healthcare quality improvement tool. Traditionally, EBCD has been sited within single services or settings and has yielded improvements grounded in the experiences of those delivering and receiving care. Method: In this article we present how EBCD can be adapted to develop complex interventions, underpinned by theory, to be tested more widely within the healthcare system as part of a multi-phase, multi-site research study. We begin with an outline of co-design and the stages of EBCD. We then provide an overview of how EBCD can be assimilated into an intervention development and evaluation study, giving examples of the adaptations and research tools and methods that can be deployed. We also suggest how to appraise the resulting intervention so it is realistic and tractable in multiple sites. We describe how EBCD can be combined with different behaviour change theories and methods for intervention development and finally, we make suggestions about the skills needed for successful intervention development using EBCD. Conclusion: EBCD has been recognised as being a collaborative approach to improving healthcare services that puts patients and healthcare staff at the heart of initiatives and potential changes. We have demonstrated how EBCD can be integrated into a research project and how existing research approaches can be assimilated into EBCD stages. We have also suggested where behaviour change theories can be used to better understand intervention change mechanisms.
155

Control of the Spar-buoy Based Wind Turbine Floating Platform Through Mooring Line Actuation

Hasan, Tajnuba 01 January 2023 (has links) (PDF)
This thesis presents an innovative approach to enhance the stability of floating offshore wind turbine (FOWT) platform through mooring actuation. First, an OC3- Hywind spar-buoy floating platform is modeled utilizing the Control-oriented, Reconfigurable, and Acausal Floating Turbine Simulator (CRAFTS) with a specific focus on predicting hydrodynamic and mooring line loads while intentionally excluding consideration of aerodynamic forces. The accuracy of this model is validated against the industry standard OpenFAST simulator through various test cases. The central objective of this study revolves around achieving robust stabilization of the spar buoy platform, primarily focusing on X-Z symmetric planar motions, including surge, pitch, and heave degrees of freedom (DOFs). To accomplish this, two linearization techniques are employed: one transforms the inherently complex nonlinear model from CRAFTS into a linear Mass-Spring-Damper (MSD) system, particularly targeting surge and pitch motions, while the other method involves the conversion of the nonlinear model from CRAFTS into the Functional Mockup Interface (FMI) within MATLAB/Simulink for linearization. The analysis utilizing Bode plots derived from these lin- earized models yields crucial insights into the system's response to mooring actuation. Notably, it emphasizes the inherent challenge in pitch control, characterized by lower gain compared to surge at relevant frequencies, necessitating substantial mooring actuation or cable length modifications for effective pitch stabilization. Then, a Linear Quadratic Regulator (LQR) controller is designed to mitigate surge and pitch motions. Numerical simulations conducted across diverse scenarios reveal the inherent challenge in simultaneously mitigating surge and pitch motions using the original platform configuration. To address this challenge, a control co-design strategy is proposed, leading to the development of an optimized mooring line configuration that effectively stabilizes both motions with minimal adjustments. In summary, this thesis introduces a control-oriented modeling approach and an innovative control strategy to enhance the stability of the floating wind turbine platform through mooring actuation. The results emphasize the potential for broader application of this approach to various floating platforms for FOWTs and the extension of stabilization efforts to address all six DOFs in future research, where aerodynamic loads are also incorporated.
156

Conception d'une architecture embarquée adaptable pour le déploiement d'applications d'interface cerveau machine / Design of an adaptable embedded architecture for the deployment of brain-machine interface applications

Belwafi, Kais 28 September 2017 (has links)
L'objectif de ces travaux de recherche est l'étude et le développement d'un système ICM embarqué en utilisant la méthodologie de conception conjointe afin de satisfaire ses contraintes spécifiques. Il en a découlé la constitution d'un système ICM complet intégrant un système d'acquisition OpenBCI et un système de traitement à base de FPGA. Ce système pourrait être utilisé dans des contextes variés : médicale (pour les diagnostiques précoces des pathologies), technologique (informatique ubiquitaire), industriel (communication avec des robots), ludique (contrôler un joystick dans les jeux vidéo), etc. Dans notre contexte d’étude, la plateforme ICM proposée a été réalisée pour assister les personnes à mobilité réduite à commander les équipements domestiques. Nous nous sommes intéressés en particulier à l'étude et à l'implémentation des modules de filtrage adaptatif et dynamique, sous forme d'un coprocesseur codé en HDL afin de réduire son temps d'exécution car c'est le bloc le plus critique de la chaine ICM. Quant aux algorithmes d'extraction des caractéristiques et de classification, ils sont exécutés par le processeur Nios-II sous son système d'exploitation en ANSI-C. Le temps de traitement d'un trial par notre système ICM réalisé est de l'ordre de 0.4 s/trial et sa consommation ne dépasse guère 0.7 W. / The main purpose of this thesis is to study and develop an embedded brain computer interface (BCI) system using HW/SW methodology in order to satisfy the system specifications. A complete BCI system integrated in an acquisition system (OpenBCI) and a hardware platform based on the FPGA were achieved. The proposed system can be used in a variety of contexts: medical (for early diagnosis of pathologies, assisting people with severe disabilities to control home devices system through thought), technological (ubiquitous computing), industrial (communication with Robots), games (control a joystick in video games), etc. In our study, the proposed ICM platform was designed to control home devices through the thought of people with severe disabilities. A particular attention has been given to the study and implementation of the filtering module, adaptive and dynamic filtering, in the form of a coprocessor coded in HDL in order to reduce its execution time as it is the critical block in the returned ICM algorithms. For the feature extraction and classification algorithms, they are executed in the Nios-II processor using ANSI-C language. The prototype operates at 200 MHz and performs a real time classification with an execution delay of 0.4 second per trial. The power consumption of the proposed system is about 0.7 W.
157

Implication des femmes dans le cycle de changement des produits d'ameublement domestique : manifestations du désir de changement, pratiques de consommation divergentes et contribution au design écologique / Involvement of women in the cycle of change of domestic furniture products : manifestations of the desire for change, divergent comsuption practices and contribution to ecological design

Zouaghi, Salma 08 December 2017 (has links)
Les produits d'ameublement domestique sont soumis à l'accélération de leur cycle de renouvellement. Ce phénomène n'est pas sans conséquences écologiques et sanitaires. Cette recherche analyse les pratiques de consommation de ces produits par les femmes, le genre le plus intéressé par l'aménagement et la décoration intérieure, dans le but d'étudier les facteurs qui sont à l'origine du désir de changement, notamment du sentiment de lassitude, les habitudes et les fréquences de renouvellement ainsi que leurs intentions en matière de préoccupation écologique. La mise en œuvre des méthodes de recherche et de traitement, issues pour l'essentiel des sciences humaines et sociales, met en lumière une catégorie de consommatrices qui résistent à la consommation des produits industrialisés et choisissent des pratiques de consommation citoyenne qui se basent essentiellement sur Je bricolage et le recyclage des produits usagés. Ces «créatifs culturels» sont à l'origine de l'émergence d'une culture éthique qui est en train de se confirmer et qui va sans doute modifier les valeurs de la société du futur. Les designers sont plus que jamais invités à se pencher de plus près sur ce nouveau profil de consommatrices dans l'idée de la production participative, du co-design. / Home furnishings are subject to an acceleration of their renewal cycle. This phenomenon has ecological and sanitary consequences. This research analyzes the consumption practices of these products by women, the gender that is most interested in interior design and decoration. It studies the factors that drive the desire for change, such as the feeling of weariness, the habits and frequencies of renewal, and women's concerns towards ecological issues. The implementation of research and treatment methods, ail coming from social sciences, highlights a category of consumers who resist to the consumption of industrialized products and choose consumption practices that are mainly based on DIY and recycling. These "cultural creatives" individuals are at the origin of the emergence of an ethical culture that is growing and that will undoubtedly modify the values that will shape the society of the future. The designers are more than ever invited to look more closely at this new profile of consumers in the idea of participative production : the co-design.
158

Recherche, développement et réalisation d'un contrôleur de Fabry-Perot de nouvelle génération / Research, development and realization of a new generation Fabry-Perot controller

Ouattara, Issa 25 June 2015 (has links)
L’équipe Physique des Galaxies du Laboratoire d’Astrophysique de Marseille a développé un nouveau type d'interféromètre de Fabry-Perot, équipé de trois actionneurs piézoélectriques amplifiés et de trois capteurs capacitifs permettant le contrôle de l'espacement et du parallélisme des lames de verres de l'ordre de 200 µm avec une précision de positionnement du nm.L'objectif visé de ce manuscrit, composé de 3 parties, est le pilotage de cet interféromètre. La première partie, composée des chapitres 1 et 2, présente les généralités sur l'interférométrie de Fabry-Perot puis décrit les instruments 3DNTT et BTFI où seront installés l'interféromètre de nouvelle génération et son contrôleur associé. La conception et la réalisation d'un amplificateur hybride en vue de la réduction des non-linéarités des actionneurs piézoélectriques mettent fin à cette partie.La deuxième partie, chapitres 3 et 4, décrit le développement et la réalisation du contrôleur. Pour cela, une démarche basée sur le concept du Co-design a été adoptée.Le contrôleur ainsi réalisé est composé d'une carte de développement Microzed dont le cœur est un système sur puce de la série Zynq 7000 EPP et d'une carte d'interfaçage comportant des convertisseurs 3 ADC et 3 DAC et des circuits d'alimentation. La troisième et dernière partie, chapitres 5 et 6, traite de la modélisation d'état de l’interféromètre de Fabry-Perot et de son contrôle : un contrôle classique basé sur la régulation PID et un contrôle robuste et optimal basé sur le filtrage de KALMAN. Cette dernière partie conclut sur les perspectives pouvant découler des contributions de ce travail sur le contrôle et la commande Fabry-Perot. / The Physics of Galaxies Team of Laboratoire d'Astrophysique de Marseille (LAM) has developed a new type of Fabry-Perot, with three amplified piezoelectric actuators and three capacitive sensors to control the spacing and parallelism of mirror plates of approximately 200 µm with a positioning accuracy of 3 nm.The purpose of this manuscript, consisting of 3 parts is the control of this interferometer.The first part, consisting of Chapters 1 and 2 presents the general interferometry Fabry-Perot and then describes 3DNTT and BTFI instruments which will be installed the next generation interferometer and its associated controller. The design and implementation of a hybrid amplifier to reduce non-linearities of the piezoelectric actuators (hysteresis and creep) end this first part.The second part, Chapters 3 and 4, describes the development and implementation of the controller.For this, an approach based on codesign concept was adopted. The thus achieved controller consists of a Microzed development board whose heart is a system on chip of the 7000 series Zynq EPP (FPGA + Dual-Core ARM Cortex A9) and an interface card with converters (3 ADC and 3 DAC) and power supply circuits.For the finalization of the controller, two steps are necessary: hardware design in Xilinx Vivado and software design in Xilinx SDK.The third and final section, chapters 5 and 6 deals with the Fabry-Perot space-state modeling and its control: a classic control based on PID control and a robust and optimal control based on KALMAN filtering. This last part concludes the outlook may result from contributions of this work on the monitoring and control of the Fabry-Perot.
159

Participatory design of a 3D-printed furniture concept for learning spaces : A study of large-scale additive manufacturing opportunities and limitations

Lundgren, Herman January 2021 (has links)
Today, learning spaces are stuck in the industrial age with rows of desks and chairs. Differentiated teaching and personalised learning are not effective in traditional learning spaces and should focus on creating future classrooms (Kariippanon, 2017). This thesis is covering how furnishing for learning environments can be improved and designed through a participatory design process with Katedralskolan in Växjö by using recycled materials and additive manufacturing technology. The thesis is also exploring the opportunities of involving stakeholders to create new learning through the additive manufacturing process in interior and furniture design. Together with Katedralskolan and Sculptur, this project is exploring a concept for schools to have integrated education in interior design through semiotics that will contribute to students’ learning and explore large-scale additive manufacturing. The objective is to design a collection of interior products that will inform and communicate at an educational level and how a circular manufacturing technique is possible through 3D-printing using communicating design and semiotics. The aim is also to understand Sculptur’s product development- and manufacturing process through large-scale 3D-printing. The mission statement whereas follows: Develop a furniture concept based on an understanding of the needs of, and participation with, the user group in a co-design process as a case to study the large-scale additive manufacturing techniques together with the given conditions provided by Sculptur. The thesis process has been following an iterative design process called the design thinking process (The Interaction Design Foundation, 2021) and a co-designing process (Sanders, 2018). The design thinking process is a design methodology that provides a solution-based approach to solving problems. The five stages of Design Thinking are as follows: Empathise, Define, Ideate, Prototype, Test. Through studies, surveys, and observations a list of stakeholder needs was created and was used when developing ideas through workshops, drawings, and prototyping. The ideas were then developed into concepts that were tested through both desktop 3D-printing and large-scale additive manufacturing. The concepts were also evaluated by stakeholders as well as through a concept evaluating matrix (Wikberg N., et.al., 2015). The result of this master thesis is the conclusion of the furniture concept as well as the study of large-scale additive manufacturing as an industrial designer. The furniture concept “Unfold lounge chair” is based on stakeholder needs and manufacturing restrictions. It is also an attempt to use theory to make the next generation of pedagogical furnishings using sustainable and circular manufacturing techniques. Through design thinking, the master thesis result was created with a human-centred approach to integrate the needs of people, the possibilities of technology and the requirements for business success (IDEO, n.d.). / Idag sitter läromiljöer fast i den industriella epoken med rader av skrivbord och stolar. Differentierad undervisning och personlig inlärning är inte effektiv i traditionella läromiljöer och bör vara i fokus för att skapa framtidens klassrum (Kariippanon, 2017). Detta examensarbete tar upp hur inredning för inlärningsmiljöer kan förbättras och utformas genom en deltagande designprocess med Katedralskolan i Växjö med hjälp av återvunna material och additiv tillverkningsteknik. Arbetet har också undersökt möjligheterna att involvera intressenter för att skapa nytt lärande genom tillämpning av additiv tillverkning inom inredning och möbeldesign. Tillsammans med Katedralskolan och Sculptur har detta projekt undersökt ett koncept för skolor att ha integrerad utbildning i möbler genom semiotik och pedagogisk design som kommer att bidra till elevernas lärande samt utforska storskalig additiv tillverkning. Målet är att utforma en samling möbelkoncept som informerar och kommunicerar på utbildningsnivå och hur en cirkulär tillverkningsteknik är möjlig genom 3D-printnig med hjälp av kommuniationsdesign och semiotik. Målet är också att förstå Sculpturs produktutvecklings- och tillverkningsprocess genom storskalig additiv tillverkning. Projektets Mission statement var följande: Utveckla ett möbelkoncept baserat på en förståelse av behoven hos användargruppen i en samdesignprocess som ett fall för att studera storskalig additiv tillverkning tillsammans med de givna förutsättningarna från Sculptur. Examensarbetet har följt en iterativ designprocess som kallas design thinking process (The Interaction Design Foundation, 2021) tillsammans med en co-designprocess (Sanders, 2018). Design thinking är en designmetodik som ger en lösningsbaserad metod för att lösa problem. De fem faserna i design thinking är följande: Empathise, Define, Ideate, Prototype, Test. Genom studier, undersökningar och observationer skapades en lista över intressenters behov och användes när idéer utvecklades genom workshops, skisser och prototyper. Idéerna utvecklades sedan till koncept som sedan testades genom både mindre 3D-utskrift och storskalig additiv tillverkning. Koncepten utvärderades också av intressenter samt genom en konceptviktningsmatris (Wikberg N., et.al., 2015). Resultatet av detta examensarbete är sammanfattningen av möbelkonceptet samt studien av storskalig additiv tillverkning som industridesigner. Möbelkonceptet ”Unfold lounge chair” bygger på intressenternas behov samt tillverkningsrestriktioner. Det är också ett försök att använda teori för att skapa nästa generation av pedagogiska möbler med hållbara och cirkulära tillverkningstekniker. Genom design thinking skapades resultatet med ett mänskligt centrerat tillvägagångssätt för att integrera människors behov, teknikens möjligheter och kraven för produktens framgång (IDEO, n.d.).
160

Implementing sensory design for care-home residents in London

Jakob, Anke, Collier, Lesley, Ivanova, Ninela 19 December 2019 (has links)
Within dementia care, there is a need to facilitate appropriate sensory experiences and opportunities for meaningful engagement for people living with dementia, particularly in later stages. As such, the provision of multisensory environments designed to meet the needs of these individuals and offering suitable occupation and stimulation, have increasingly gained significance. In this context, this paper explores the meaning of experience-focused, sensory design and the importance of appropriate sensory stimulation for wellbeing. It refers to recent interdisciplinary research in this area and a new guide advising on design of sensory enhanced spaces in residential dementia care. The primary focus of the paper is a case study showcasing the implementation of sensory design, based on these guidelines. The case study reports on the co-creation of a sensory, experience-focused space for residents with dementia in a London care-home. Based on this example, the paper highlights the value and impact of appropriate sensory design on the wellbeing of people with dementia and their carers. The conclusion discusses the learning and knowledge gained from this process as well as perspectives on further research activities including the analysis of user feedback and evaluation of the design intervention.

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