10,955 research outputs found

    Technology for large space systems: A special bibliography with indexes (supplement 03)

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    A bibliography containing 217 abstracts addressing the technology for large space systems is presented. State of the art and advanced concepts concerning interactive analysis and design, structural concepts, control systems, electronics, advanced materials, assembly concepts, propulsion, solar power satellite systems, and flight experiments are represented

    Energy Power, Digital Infrastructure and Elearning Platforms: Afrrican Experience.

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    Information and communication technologies are one of the most pervasive technologies in the world, second only to 'human intelligence' or the human brain. Thus, understanding the factors that determine the diffusion of new technologies across african countries is important to understanding the process of economic development. And whereas, energy is linked with the capacity to perform, the rate at which energy is consumed for the acceleration of the pace of socio-economic activities is regarded as power. Consequently, it will be obvious that the magnitude of the standard of living in any society; the growth and development of such an economy; and its ability to affect the course of events(such as ICT revolution)will be a function of the extent to which its energy(power) resources are developed and utilised. This paper therefore argued for the need to provide assistance in reducing vulnerability and building the capacity of african countries to more widely reap the benefits of the clean development mechanism in areas such as the development of cleaner and renewable energies. Inevitably, this is the critical condition for the sustainability of the emergent e-learning platforms and digital networks in africa.ICT, learning, elearning, development, energy, power, information, communication, solar, electricity, wind, governance, africa, electronics, telecommunications, internet, digital, satellite, renewable energy, gas turbine, power plants, bandwidth, coal, hydro, biomass, steam, transmission, distribution, utilisation

    Design Solutions For Modular Satellite Architectures

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    The cost-effective access to space envisaged by ESA would open a wide range of new opportunities and markets, but is still many years ahead. There is still a lack of devices, circuits, systems which make possible to develop satellites, ground stations and related services at costs compatible with the budget of academic institutions and small and medium enterprises (SMEs). As soon as the development time and cost of small satellites will fall below a certain threshold (e.g. 100,000 to 500,000 €), appropriate business models will likely develop to ensure a cost-effective and pervasive access to space, and related infrastructures and services. These considerations spurred the activity described in this paper, which is aimed at: - proving the feasibility of low-cost satellites using COTS (Commercial Off The Shelf) devices. This is a new trend in the space industry, which is not yet fully exploited due to the belief that COTS devices are not reliable enough for this kind of applications; - developing a flight model of a flexible and reliable nano-satellite with less than 25,000€; - training students in the field of avionics space systems: the design here described is developed by a team including undergraduate students working towards their graduation work. The educational aspects include the development of specific new university courses; - developing expertise in the field of low-cost avionic systems, both internally (university staff) and externally (graduated students will bring their expertise in their future work activity); - gather and cluster expertise and resources available inside the university around a common high-tech project; - creating a working group composed of both University and SMEs devoted to the application of commercially available technology to space environment. The first step in this direction was the development of a small low cost nano-satellite, started in the year 2004: the name of this project was PiCPoT (Piccolo Cubo del Politecnico di Torino, Small Cube of Politecnico di Torino). The project was carried out by some departments of the Politecnico, in particular Electronics and Aerospace. The main goal of the project was to evaluate the feasibility of using COTS components in a space project in order to greatly reduce costs; the design exploited internal subsystems modularity to allow reuse and further cost reduction for future missions. Starting from the PiCPoT experience, in 2006 we began a new project called ARaMiS (Speretta et al., 2007) which is the Italian acronym for Modular Architecture for Satellites. This work describes how the architecture of the ARaMiS satellite has been obtained from the lesson learned from our former experience. Moreover we describe satellite operations, giving some details of the major subsystems. This work is composed of two parts. The first one describes the design methodology, solutions and techniques that we used to develop the PiCPoT satellite; it gives an overview of its operations, with some details of the major subsystems. Details on the specifications can also be found in (Del Corso et al., 2007; Passerone et al, 2008). The second part, indeed exploits the experience achieved during the PiCPoT development and describes a proposal for a low-cost modular architecture for satellite

    Electromechanical Systems in Building Services Engineering

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    There are myriad of electromechanical systems in domestics, commercial and industrial buildings. Part or most of these systems hardware are hidden from the public though they do account for between 50% to 75% of the total construction cost and take up to 15% of the building volume. This paper is aimed at enumerating their functions as a prerequisite for designing (including modelling and simulation), selecting, integrating, managing and reduction in energy usage. The electromechanical systems included in this paper are cold and hot water supplies, heating, ventilation, air conditioning, drainage, sanitation, refuse and sewage disposal, gas, electricity, access control, communication, oil installation, fire fighting and transportatio

    On air.

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    Lo Kong Alvin."Architecture Department, Chinese University of Hong Kong, Master of Architecture Programme 1996-97, design report."Includes bibliographical references.Chapter 1.0 --- INTRODUCTIONChapter 1.1 --- GENERAL BACKGROUNDChapter 1.2 --- DEFICIENCY IN RTHKChapter 1.3 --- TECHNOLOGICAL REVOLUTIONChapter 1.4 --- COMPARISONChapter 1.5 --- RATIONALIZATIONChapter 1.6 --- ARCHITECTURAL RESPONSEChapter 1.7 --- SUMMARYChapter 1.8 --- METHODOLOGYChapter 2.0 --- BACKGROUND OF RTHKChapter 2.1 --- OBJECTIVESChapter 2.2 --- ROLES OF RTHKChapter 2.3 --- HISTORYChapter 2.4 --- ORGANIZATIONChapter 2.5 --- OPERATIONChapter 2.6 --- PROGRAMChapter 3.0 --- PHYSICAL CONDITIONS OF EXISTING RTHKChapter 3.1 --- REGIONAL CONTEXT OF KOWLOON TONGChapter 3.2 --- SITE AND FACILITIESChapter 3.3 --- BROADCASTING HOUSEChapter 3.4 --- TELEVISION HOUSEChapter 3.5 --- EDUCATION TELEVISION CENTERChapter 4.0 --- THE PROPOSALChapter 4.1 --- MISSIONChapter 4.2 --- GOALSChapter 4.3 --- OBJECTIVESChapter 4.4 --- PERFORMANCE REQUIREMENTSChapter 4.5 --- SITE OPPORTUNITIESChapter 4.6 --- SCHEDULE OF ACCOMMODATIONChapter 5.0 --- DESIGN REPORTChapter 5.1 --- CONCEPTSChapter 5.2 --- DESIGN DEVELOPMENTChapter 5.3 --- DESIGN OPTIONSChapter 6.0 --- SCHEMATIC DESIGNChapter 6.1 --- CONCEPTChapter 6.2 --- DESIGN OPTIONSChapter 6.3 --- DETAIL DESIGNChapter 7.0 --- RESEARCH AND FIELD WORKS (I) ENERGYChapter 7.1 --- PHOTOVOLTAIC ENGINEERINGChapter 7.2 --- STRUCTURE OF A PHOTOVOLTAIC SYSTEMChapter 7.3 --- ENERGY STORAGEChapter 7.4 --- APPLICATION: SOLAR TELECOMMUNICATIONChapter 8.0 --- RESEARCH AND FIELD WORKS (II) STUDIOChapter 8.1 --- TYPES OF STUDIOSChapter 8.2 --- PERFORMANCE STUDIOSChapter 8.3 --- PRODUCTION STUDIOSChapter 8.4 --- POSTPRODUCTION STUDIOSChapter 8.5 --- MOBILE STUDIOSChapter 8.6 --- PORTABLE EQUIPMENTChapter 8.7 --- STUDIO DESIGNChapter 8.8 --- ERGONOMICSChapter 9.0 --- CASE STUDIESChapter 9.1 --- STUDIO CASE STUDIESChapter 9.2 --- RELOCATABLE ARCHITECTURE CASE STUDIE

    South-South Investment in Infrastructure: The Operation of Indian Firms in Developing Countries

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    Since 1990s South-South investment flows have assumed a considerable significance in the economic relations among developing countries. The host developing countries tend to see the growing FDI flows from co-developing economies as a prospective source of financial capital, skills and technologies useful for their economic development. However, there is clearly a lack of recognition among them about the potential of southern investment in improving their civil, social and industrial infrastructure. A distinction can be made between the two main forms in which developing country firms participate in the infrastructure sector of co-developing countries. The first is the project exports resorted by southern firms in various infrastructure areas like transportation, communication, energy, etc. The second form comprises direct investment operation of southern firms to provide infrastructure services to the end users. India presents a classic example of South-South investment in infrastructure sector with Indian firms consistently expanding their project exports and infrastructure-related FDI activities over the years. In the light of growing size of Indian project exports and infrastructure FDI, this study calls for evolving a holistic policy framework by both home and host developing countries to enhance the potential of such investment for infrastructure development.FDI, Project Exports, Developing Countries
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