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  • 1
    Publication Date: 2019-07-13
    Description: The advanced communications technology satellite (ACTS), developed and built by Lockheed Martin Astro Space for the NASA Lewis Research Center, was launched in September 1993 on the Shuttle STS 51 mission. ACTS is a digital experimental communications test bed that incorporates gigahertz bandwidth transponders operating at Ka band hopping spot beams. on-board storage and switching and dynamic rain fade compensation. This paper describes the ACTS enabling technologies, the design of the communications payload, the constraints imposed on the spacecraft bus, and the measurements conducted to verify the performance of the system in orbit.
    Keywords: Communications and Radar
    Type: ACTS-96-034 , International Journal of Satellite Communications (ISSN 0737-2884); 14; 133-159
    Format: text
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  • 2
    Publication Date: 2019-06-27
    Description: Technology development for electrodeposition of aluminum alloys and beryllium
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-CR-66941 , REPT-4031
    Format: application/pdf
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  • 3
    Publication Date: 2023-07-18
    Description: Este texto é um ensaio etnográfico com base em situações vivenciadas pelo coautor Rafael da Costa enquanto trabalhava como analista ambiental no departamento de meio ambiente de uma corporação produtora de energia elétrica, entre 2010-2013, período em que integrava a equipe técnica responsável pela condução de programas de mitigação e compensação ambiental da Barragem Belo Monte, na Volta Grande do rio Xingu, Amazônia. Em uma abordagem antropológica, o ensaio busca descrever como os profissionais da expertise ambiental corporativa interpretam um mundo muito mais vasto do que aquele alcançado pelos jargões de sua atividade no cotidiano. Nosso objetivo é demonstrar como os modos mais íntimos de entendimento destes profissionais – os quais se estabelecem em contraste com os padrões técnicos requeridos da análise ambiental empresarial – configuram fator produtivo das dimensões de destruição e morte que marcam o campo de um megaempreendimento.
    Description: This paper is an ethnographic essay based on the work experience of one of the authors (da Costa) inside the environmental department of an electric energy producer corporation, between 2010 and 2013, period during which he was part of the technical team responsible for conducting environmental measures of the Belo Monte Dam on the Xingu River, in the region known as Volta Grande, Amazon. Following an anthropological approach, the essay describes how the corporate environmental experts interpret a world vastly more complex than that reached by the jargon vocabulary of their professional activity in their daily lives. Our aim is to show how the most intimate understandings of these professionals – in contrast to the technical standards required by corporate environmentalism – configure a productive factor of the destructive and death dimensions that characterize the territories of a mega-project.
    Language: Portuguese
    Type: info:eu-repo/semantics/article
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