A Perspective on the Use of Storable Propellants for Future Space Vehicle Propulsion

Propulsion system configurations for future NASA and DOD space initiatives are driven by the continually emerging new mission requirements. These initiatives cover an extremely wide range of mission scenarios, from unmanned planetary programs, to manned lunar and planetary programs, to earth-oriented (Mission to Planet Earth) programs, and they are in addition to existing and future requirements for near-earth missions such as to geosynchronous earth orbit (GEO). Increasing space transportation costs, and anticipated high costs associated with space-basing of future vehicles, necessitate consideration of cost-effective and easily maintainable configurations which maximize the use of existing technologies and assets, and use budgetary resources effectively. System design considerations associated with the use of storable propellants to fill these needs are presented. Comparisons in areas such as complexity, performance, flexibility, maintainability, and technology status are made for earth and space storable propellants, including nitrogen tetroxide/monomethylhydrazine and LOX/monomethylhydrazine

How Misinformation and Mistrust Compound the Threat of Epidemics

This thesis was conducted to study the effects of misinformation and medical mistrust on the public health field. I use the events of the Chapare Virus outbreak in Bolivia in the summer of 2019 and the public dialogue during that time period to discuss these themes. I used data from market survey\u27s in La Paz, newspaper articles from Página Siete, and Tweets from the time period of the outbreak. My findings suggest that misinformation and medical mistrust affected public health measures, which has major implications for the way the public health field should address future public health events

Genealogies of Risk: Searching for Safety, 1930s-1970s

Health, safety, and environmental regulation in the United States are saturated with risk thinking. It was not always so, and it may not be so in the future. But today, the formal, quantitative approach to risk provides much of the basis for regulation in these fields, a development that seems quite natural, even necessary. This particular approach, while it drew on conceptual and technical developments that had been underway for decades, achieved prominence during a relatively short timeframe; roughly, between the mid-1970s and the early 1980s--a time of hard looks and regulatory reform. Prior to this time, formal conceptions of risk were rarely invoked in the effort to regulate the increasingly complex set of hazards associated with industrial society and quantitative risk assessment was considered too uncertain to serve as a basis for regulatory decision making. With few exceptions, safety, hazard, and endangerment provided the dominant framings, drawing on different conceptual and normative tendencies and leading to different regulatory outcomes. This Article investigates the emergence and development of formal approaches to risk in health, safety, and environmental law during the twentieth century. It focuses specifically on the concepts, tools, and practices that have underwritten risk thinking in these fields, developing a perspective on health, safety, and environmental regulation that seeks to historicize risk and situate the contemporary debate regarding the merits of risk versus precaution in its proper historical context. In doing so, the Article demonstrates how both approaches struggled to address the much more vast and complicated world of potential environmental harm brought into view as a result of substantial advances in analytical techniques during the 1960s and early 1970s, thereby revealing the contours of a more fundamental clash over environmental law\u27s distinctive problem of knowledge. The Article covers the formative period from the New Deal through the 1970s, showing how efforts to operationalize safety in the middle decades of the twentieth century led to many of the foundational concepts and techniques that would structure risk thinking in subsequent decades, highlighting the critical role of analytical advances in pushing toward a redefinition of safety as acceptable risk and a corresponding move toward quantitative risk assessment, and revealing how earlier precautionary impulses were ultimately subsumed under an emerging administrative law of risk

Genealogies of Risk: Searching for Safety, 1930s-1970s

Health, safety, and environmental regulation in the United States are saturated with risk thinking. It was not always so, and it may not be so in the future. But today, the formal, quantitative approach to risk provides much of the basis for regulation in these fields, a development that seems quite natural, even necessary. This particular approach, while it drew on conceptual and technical developments that had been underway for decades, achieved prominence during a relatively short timeframe; roughly, between the mid-1970s and the early 1980s--a time of hard looks and regulatory reform. Prior to this time, formal conceptions of risk were rarely invoked in the effort to regulate the increasingly complex set of hazards associated with industrial society and quantitative risk assessment was considered too uncertain to serve as a basis for regulatory decision making. With few exceptions, safety, hazard, and endangerment provided the dominant framings, drawing on different conceptual and normative tendencies and leading to different regulatory outcomes. This Article investigates the emergence and development of formal approaches to risk in health, safety, and environmental law during the twentieth century. It focuses specifically on the concepts, tools, and practices that have underwritten risk thinking in these fields, developing a perspective on health, safety, and environmental regulation that seeks to historicize risk and situate the contemporary debate regarding the merits of risk versus precaution in its proper historical context. In doing so, the Article demonstrates how both approaches struggled to address the much more vast and complicated world of potential environmental harm brought into view as a result of substantial advances in analytical techniques during the 1960s and early 1970s, thereby revealing the contours of a more fundamental clash over environmental law\u27s distinctive problem of knowledge. The Article covers the formative period from the New Deal through the 1970s, showing how efforts to operationalize safety in the middle decades of the twentieth century led to many of the foundational concepts and techniques that would structure risk thinking in subsequent decades, highlighting the critical role of analytical advances in pushing toward a redefinition of safety as acceptable risk and a corresponding move toward quantitative risk assessment, and revealing how earlier precautionary impulses were ultimately subsumed under an emerging administrative law of risk

Just Price, Public Utility, and the Long History of Economic Regulation in America

This Essay investigates the history of \u27just price and its influence on the concept and practice of public utility regulation in the United States. It begins with a discussion of the Scholastic understanding of just price and its relationship to commutative justice, with particular attention to the problem of coercion in economic exchange. The Essay then discusses the centrality of just price to broader ideas of moral economy and to economic thought and regulation in colonial America and the early United States

American Square Dance Vol. 60, No. 10 (Oct. 2005)

Monthly square dance magazine that began publication in 1945

American Square Dance Vol. 64, No. 2 (Feb. 2009)

Monthly square dance magazine that began publication in 1945

American Square Dance Vol. 62, No. 4 (Apr. 2007)

Monthly square dance magazine that began publication in 1945

American Square Dance Vol. 64, No. 3 (Mar. 2009)

Monthly square dance magazine that began publication in 1945

American Square Dance Vol. 64, No. 10 (Oct. 2009)

Monthly square dance magazine that began publication in 1945