14,568 research outputs found

    Large engines and vehicles, 1958

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    During the mid-1950s, the Air Force sponsored work on the feasibility of building large, single-chamber engines, presumably for boost-glide aircraft or spacecraft. In 1956, the Army missile development group began studies of large launch vehicles. The possibilities opened up by Sputnik accelerated this work and gave the Army an opportunity to bid for the leading role in launch vehicles. The Air Force had the responsibility for the largest ballistic missiles and hence a ready-made base for extending their capability for spaceflight. During 1958, actions taken to establish a civilian space agency, and the launch vehicle needs seen by its planners, added a third contender to the space vehicle competition. These activities during 1958 are examined as to how they resulted in the initiation of a large rocket engine and the first large launch vehicle

    Increasing Energy Efficiency in Existing Residential Buildings: A Case Study of the Community Home Energy Retrofit Project (CHERP)

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    This thesis uses a case study of the Community Home Energy Retrofit Project (CHERP) and it analyzes the larger statewide effort in California to increase energy efficiency in existing residential buildings to reduce greenhouse gas emissions. CHERP’s primary strategy is to embed itself into a community, educate residents on the multiple benefits of energy efficiency, and inspire them to take energy-saving actions in their own homes. It then builds its own community by connecting like-minded individuals together and provides an opportunity for them to exercise their political agency. This thesis analyzes CHERP’s effort in the context of the political, social, and economic climate of California. It identifies three obstacles for widespread energy efficiency adoption: one, CHERP’s lack of funding to support permanent staff and pay for collateral materials; two, low access to energy efficiency measures for low-income households and renters; and three, a lack of high quality home performance contractors that perform energy efficiency upgrades utilizing a whole-house energy systems approach. The thesis concludes with five recommendations to overcome these issues

    Space resources. Volume 4: Social concerns

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    Space resources must be used to support life on the Moon and exploration of Mars. This volume, Social Concerns, covers some of the most important issues which must be addressed in any major program for the human exploration of space. The volume begins with a consideration of the economics and management of large scale space activities. Then the legal aspects of these activities are discussed, particularly the interpretation of treaty law with respect to the Moon and asteroids. The social and cultural issues of moving people into space are considered in detail, and the eventual emergence of a space culture different from the existing culture is envisioned. The environmental issues raised by the development of space settlements are faced. Some innovative approaches are proposed to space communities and habitats and self-sufficiency is considered along with human safety at a lunar base or outpost

    Solar Training and Hiring Insights

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    The research report, Solar Training and Hiring Insights 2017, aims to increase understanding of U.S. solar training, hiring practices, and market trends to help the industry make better, more informed decisions. The report aggregates and analyzes data from several research efforts, including an extensive survey of more than 400 solar installers; in-depth case studies of 10 solar installation firms; interviews with dozens of solar employers, trainers, and workforce development boards; and The Solar Foundation's National Solar Jobs Census series.The report also provides a state-by-state index that helps decision makers predict which states are most likely to experience shortages of qualified solar workers (see map below). These states are the most likely to need additional resources for training and workforce development in the coming years

    A Report on Utility Participation in Solar Energy Development

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    The promise of solar energy use in remedying the critical need for energy sources which provide alternatives to oil is the concern of this article. The author examines the role that utility companies could perform in the development and marketing of solar energy systems and considers the potential for anticompetitive abuse that might result. He concludes, however, that congressional plans for solar development have placed unfair, unwarranted, and counterproductive restrictions on utilities and may have precluded otherwise promising development

    Preparing the Workforce for a "Green Jobs" Economy

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    Identifies the types of jobs and skills that will be in demand in clean energy economy and the factors that are driving the new energy economy and the growth of its workforce. Also considers strategies for building competitive, flexible workforce systems that can respond to emerging employer needs and highlights best practices occurring around the nation
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