254,237 research outputs found

    Quenching the Dragon's Thirst: The South-North Water Transfer Project -- Old Plumbing for New China?

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    As the legend goes, when a man named Yu heeded the dragon's instructions about how to channel flood waters, he tamed China's rivers and was made emperor. China's rulers have long understood the critical importance of water in ensuring their country's prosperity -- and the link between how effectively they manage these resources and their own political longevity. The pressures for efficient management of water today is similarly challenging as in the past -- China's government must possess the ability to maintain the hydraulic systems necessary to mitigate flooding from China's great rivers but also to ensure an adequate supply of water for the needs of its people. As Joseph Needham in his epic history Science and Civilization in China observed, the challenges of flood control and of maintaining irrigation and water transportation networks, among other dimensions of water management, served as sources of innovation in Chinese civilization as it developed, stimulating technological invention and intellectual debate

    The Honor of Private Law

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    While combativeness is central to how our culture both experiences and conceptualizes litigation, we generally notice it only as a regrettable cost. This Article offers a less squeamish vision, one that sees in the struggle of people suing one another a morally valuable activity: the vindication of insulted honor. This claim is offered as a normative defense of a civil recourse approach to private law. According to civil recourse theorists, tort and contract law should be seen as empowering plaintiffs to act against defendants, rather than as economically optimal incentives or as a means of enforcing duties of corrective justice. The justification of civil recourse must answer three questions. First, under what circumstances-if any-is one justified in acting or retaliating against a wrongdoer? Second, under what circumstances does the state have reasons for providing a mechanism for such action? Finally, how are the answers to these questions related to the current structure of our private law? This Article offers the vindication of wronged honor as an answer to these three questions. First, I establish the historical connection between honor and litigation by looking at the quintessential honor practice, dueling. Then I argue that the vindication of honor is normatively attractive. I do this by divorcing the idea of honor from unsavory associations with violence and aristocracy, showing how it can be made congruent with certain core modern concerns. In particular, when insulted parties act against wrongdoers, they reestablish the position of respect and equality that the insult upset. I then show how having the state provide plaintiffs with a means of vindicating their honor avoids making the political community complicit in the humiliation of its citizens and provides those citizens with a means of exercising their agency in ways that provide a foundation for self-respect. Finally, I show those areas of private law where honor operates most powerfully as a justification for providing recourse through the courts, while acknowledging that it operates less powerfully as a reason in other areas

    Beyond Gift and Bargain: Some Suggestions for Increasing Kidney Exchanges

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    Each year, thousands of people in the United States die from end stage renal disease (ESRD), despite the fact that we have the medical knowledge necessary to save them. The reason is simple: these people need a kidney transplant and we have too few kidneys. Given our current technology, the only way to meet the massive annual shortfall between the number of kidneys that are donated and the number of kidneys that are necessary to save the lives of those with ESRD is to increase the number of living donations. The debate on how to do so has often pitted those who favor creating a “free market” in human organs against those who believe that the selling of organs by human donors poses unacceptable evils and risks. Current law prohibits donors from being paid for kidneys. Once the donation has been made, however, the kidney will often change hands in exchange for money several times before reaching the patient. There are no serious proposals to ban such transactions. This article generally sympathizes with those who favor the free alienation of kidneys by donors in exchange for payment. The goal of this article, however, is not to make another charge across the no man’s land separating free-marketeers from prohibitionists. Rather, it aims to explore ways in which we can increase trust in order to foster a promising new development in transplant medicine: extended kidney exchange

    Electrical power loss from high-voltage power circuits through plasma leakage

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    Methods are proposed for constructing a solar power satellite system which would decrease electric current leakage through plasma

    A heuristic mathematical model for the dynamics of sensory conflict and motion sickness

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    By consideration of the information processing task faced by the central nervous system in estimating body spatial orientation and in controlling active body movement using an internal model referenced control strategy, a mathematical model for sensory conflict generation is developed. The model postulates a major dynamic functional role for sensory conflict signals in movement control, as well as in sensory-motor adaptation. It accounts for the role of active movement in creating motion sickness symptoms in some experimental circumstance, and in alleviating them in others. The relationship between motion sickness produced by sensory rearrangement and that resulting from external motion disturbances is explicitly defined. A nonlinear conflict averaging model is proposed which describes dynamic aspects of experimentally observed subjective discomfort sensation, and suggests resulting behaviours. The model admits several possibilities for adaptive mechanisms which do not involve internal model updating. Further systematic efforts to experimentally refine and validate the model are indicated

    A heuristic mathematical model for the dynamics of sensory conflict and motion sickness

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    The etiology of motion sickness is now usually explained in terms of a qualitatively formulated sensory conflict hypothesis. By consideration of the information processing task faced by the central nervous system in estimating body spatial orientation and in controlling active body movement using an internal model referenced control strategy, a mathematical model for sensory conflict generation is developed. The model postulates a major dynamic functional role for sensory conflict signals in movement control, as well as in sensory motor adaptation. It accounts for the role of active movement in creating motion sickness symptoms in some experimental circumstances, and in alleviating them in others. The relationship between motion sickness produced by sensory rearrangement and that resulting from external motion disturbances is explicitly defined. A nonlinear conflict averaging model describes dynamic aspects of experimentally observed subjective discomfort sensation, and suggests resulting behavior

    Sensory conflict in motion sickness: An observer theory approach

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    Motion sickness is the general term describing a group of common nausea syndromes originally attributed to motion-induced cerebral ischemia, stimulation of abdominal organ afferent, or overstimulation of the vestibular organs of the inner ear. Sea-, car-, and airsicknesses are the most commonly experienced examples. However, the discovery of other variants such as Cinerama-, flight simulator-, spectacle-, and space sickness in which the physical motion of the head and body is normal or absent has led to a succession of sensory conflict theories which offer a more comprehensive etiologic perspective. Implicit in the conflict theory is the hypothesis that neutral and/or humoral signals originate in regions of the brain subversing spatial orientation, and that these signals somehow traverse to other centers mediating sickness symptoms. Unfortunately, the present understanding of the neurophysiological basis of motion sickness is far from complete. No sensory conflict neuron or process has yet been physiologically identified. To what extent can the existing theory be reconciled with current knowledge of the physiology and pharmacology of nausea and vomiting. The stimuli which causes sickness, synthesizes a contemporary Observer Theory view of the Sensory Conflict hypothesis are reviewed, and a revised model for the dynamic coupling between the putative conflict signals and nausea magnitude estimates is presented. The use of quantitative models for sensory conflict offers a possible new approach to improving the design of visual and motion systems for flight simulators and other virtual environment display systems

    Development and fabrication of advanced battery energy storage system Mid-term report, 27 Sep. 1966 - 26 Mar. 1967

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    Silver-cadmium secondary battery energy storage system using vented cells for manned orbital spacecraf
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