Thesis (M.Ed.)--York University, 2008. Graduate Programme in Education. / Typescript. Includes bibliographical references (leaves 76-79). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:MR51554

Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Thesis (Ph.D.)--University of Texas at Dallas, 2007. / Includes vita. Includes bibliographical references (leaves 104-118)

Thesis (Ph.D.)(Engineering Management)--University of Pretoria, 2006. / Includes summary. Includes bibliographical references. Available on the Internet via the World Wide Web.

[by] Eric von Hippel. / Includes bibliographical references. / The research reported in this paper was supported by the Office of National R&D Assessment, NSF (Grant no. DA-44366) and the Office of Experimental R&D Incentives, NSF (Grant no. CG-00002).

Eric von Hippel. / "August 1985." / Bibliography: p. 33-35.

Information and Communication Technology (ICT) facilitates better communication within the construction industry and has the potential to change the industry beyond recognition. The aim of this research is to develop a theoretical Digital Nervous System (DNS) model for the UK construction industry to enable companies to improve their corporate business performance. To accomplish the aim of the research, the author conducted extensive secondary and primary data collection. Two primary research techniques were adopted to elicit data and information from respondents, these were; questionnaire surveys and structured interviews. A comprehensive review of secondary data was undertaken, this included a review of published literature, both in print and electronic format. A theoretical DNS model has been proposed by the author in this research. This DNS model is able to support and integrate the following functions: To manage inner-company operations more efficiently using Enterprise Resource Planning (ERP) and Intranet technology. To use Extranets to improve communication with business partners by sharing up-to-date information. To exploit the potential of the Internet to increase interaction with the public, interest groups and potential clients. To create commercial benefits available to the construction industry through the use of e-Commerce. The potential benefits of utilising a DNS model for a construction organisation are significant. The possible improvements that can be attributed to adopting the DNS model proposed by the author of this research include: • Reduction in an organisation's costs and construction time. • Improved profits. • Reduction in defects and waste. • Increase in productivity and client satisfaction.

Things make us smart. Tools are made by humans aiming not only at solving technical problem but also developing high-order thinking. In a manner different from traditional mathematics lessons involving direct transmission of knowledge from teachers to students, tool-based mathematics classrooms fabricate an interactive teaching and learning environment. This environment fosters teachers' professional guidance based on students' manipulation of tools. The design of tool-based task aims to formulate students' learning experience via their own acquisition of knowledge through tool manipulations. Mathematics concepts can be visualized and manipulated by students through engaging in activities with tools generating tool-based signs and mathematics signs in a semiotic process. The role of mathematics teachers in tool-based mathematics classrooms is to provide well designed tool-based tasks and implement tool-based lessons in order to orchestrate students' learning, coupled with the endeavour of students' manipulating of tools.;Two new ideas, named didactical interactions and Tool-Task dialectics, were proposed in the study to effectively enforce mathematics teachers' instruction through tool-based pedagogy in interactive classrooms. The main objective of this study was to holistically investigate the implementation processes of tool-based lessons by mathematics teachers based on some theoretical perspectives. A multiple-case study, consisting of three cases with similar and different backgrounds, was conducted. Didactical cycle was one of the main theoretical frameworks, which framed analysis of the study. Based on in-depth analysis within and across cases, didactical interactions and Tool-Task dialectics were empirically developed to enrich tool-based education theories allowing teachers to demystify the cognitive development of students in tool-based lessons. The analysis of flows of the lessons uttered transition directions of critical phases ground on the theory; while pragmatic manipulations of tools operated by students and teachers' orchestration provided strong evidence to illustrate interplay between tools and tasks. Thus, the findings of the study potentially contributed to some aspects of tool-based mathematics education research.;Keywords: tool-based task design, tool of semiotic mediation, didactical cycle, didactical interactions, tool-task dialectic, mathematics classroom.

Rural areas are particularly affected by demographic ageing. In later life, the likelihood of living with chronic, manageable, physical conditions increases, affecting the ability to get out and about and be involved with the community. New digital technologies offer novel opportunities for overcoming physical barriers associated with engagement with others, which, amongst other benefits, can enhance wellbeing. These technologies may benefit all age groups in all types of community but could be of particular value in rural areas, which are characterised with dispersed settlement structures, accessibility restrictions and out-migration of family members and in-migration of new residents. The aim of this PhD project was to explore the potential benefits of digital technology, specifically designed for largely housebound older adults in rural North East Scotland, to enhance the sense of involvement they have with the local community. In this multi-methods project, sixteen interviews were conducted with largely housebound older adults living across North East Scotland, the majority in remote and accessible rural areas, to investigate how technology could enhance the sense of involvement older adults could have with their local community. These interviews, along with findings from two focus groups carried out with older adults, were used iteratively to inform the overall concept of the technology, followed by the design and development of a technology prototype. The prototype, entitled Window to the Outside World, was then evaluated with ten interviewees to explore whether live-streaming of local events could potentially enhance the sense of involvement one had with their local community, for those who were largely housebound in rural areas. The findings indicated that digital technologies, such as Window to the Outside World, carry much potential to provide supplementary avenues for increasing one's sense of involvement in the community for largely housebound older adults. There is scope to investigate whether use of such a technology could bring both individual and community-wide benefits for wellbeing, through increased opportunities for identity continuity, imaginative mobility as well as those gained from adopting a purely spectator role, and potential therapeutic benefits from the content of the footage. There is potential to develop the technology further to make it fit to their needs even more effectively.

Commercial prosthetic feet weigh about 25% of their equivalent physiological counterparts. The human body has a tendency to overcome the walking asymmetry resulting from the mass imbalance by exerting more energy. A two link passive walking kinematic model, with realistic masses for prosthetic, physiological legs and upper body, has been proposed to study the gait pattern with unbalanced leg masses. The 'heel to toe' rolling contact has significant influence on the dynamics of biped models. This contact is modelled using the roll-over shape defined in the local co-ordinate system aligned with the stance leg. The effect of rollover shape curvature and arc length has been studied on various gait descriptors such as average velocity, step period, inter leg angle (and hence step length), mechanical energy. The bifurcation diagrams have been plotted for point feet and different gain values. The insight gained by studying the bifurcation diagrams for different gain and length values is not only useful in understanding the stability of the biped walking process but also in the design of prosthetic feet. It is proposed that the stiffness and energy release mechanisms of prosthetic feet be designed to satisfy amputee's natural gait characteristics that are defined by an effective roll-over shape and corresponding ground reaction force combinations. Each point on the roll-over shape is mapped with a ground reaction force corresponding to its time step. The resulting discrete set of ground reaction force components are applied to the prosthetic foot sole and its stiffness profile is optimised to produce a desired deflection as given by the corresponding point on the roll-over shape. It is shown that the proposed methodology is able to provide valuable insights in the guidelines for selection of materials for a multi-material prosthetic foot.