14,220 research outputs found

    Rocket Based Combined Cycle (RBCC) Propulsion Technology Workshop. Volume 1: Executive summary

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    The goal of the Rocket-Based Combined Cycle (RBCC) Propulsion Technology Workshop was to assess the RBCC propulsion system's viability for Earth-to-Orbit (ETO) transportation systems. This was accomplished by creating a forum (workshop) in which past work in the field of RBCC propulsion systems was reviewed, current technology status was evaluated, and future technology programs in the field of RBCC propulsion systems were postulated, discussed, and recommended

    Transportation Economics

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    "Dangerous and disordered": the discursive construction of "mental illness" in public texts

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    The Mental Health Act 1983, amended in 2007, appears based on the assumption that an undisputed entity of “mental disorder” exists, that people who are designated mentally disordered should be treated, and if necessary, detained by doctors. This study aimed to examine how mental disorder was discursively constructed and how different institutional interventions and practices were justified and legitimised in the House of Commons’ debates regarding the Mental Health Act 2007. Verbatim transcripts from House of Commons debates on the Mental Health Act (conducted between 24th April and 15th May 2007) were studied through a discourse analysis. Seven primary discursive constructions were identified: “The Trusted and Medically Objective Expert,” “The Emergency,” “A Fair Process,” “Supporting Subjects,” “The Decision-Making Impaired and Vulnerably Ill Patient,” “The Lawyer’s Field Day,” and “Societal (Dis)Order.” The study concludes that mental disorder was represented in selective and systemic ways that can help justify and legitimise different interventions and practices, for example, enforced medication, making government legislation and psychiatric practices seem necessary. Consideration was given to how psychiatric practices could be problematic for some service users and how legislation could be based on political and public concerns about social disorder

    X-Ray Eclipse Timing in the LMXB EXO0748-676

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    Orbital period changes are an important diagnostic for understanding low mass X-ray binary (LMXB) accretion-induced angular momentum exchange and overall system evolution. We present our most recent results for the eclipse timing of the LMXB EXO0748-676. Since its discovery in 1985 it has apparently undergone three distinct orbital period "epochs", each characterized by a different orbital period than the previous epoch. We outline the orbital period behavior for EXO0748-676 over the past 18 years and discuss the implications of this behavior in light of current theoretical ideas for LMXB evolution.Comment: 4 Pages, 3 Figures, Submitted to the X-Ray Timing 2003: Rossi and Beyond conference, November 200
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