9,388 research outputs found

    Nickel-cadium batteries for Apollo telescope mount

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    The operational testing and evaluation program is presented which was conducted on 20-ampere-hour nickel-cadmium (Ni-Cd) batteries for use on the Apollo telescope mount (ATM). The test program was initiated in 1967 to determine if the batteries could meet ATM mission requirements and to determine operating characteristics and methods. The ATM system power and charging power for the Ni-Cd secondary batteries is provided by a solar array during the 58-minute daylight portion of the orbit; during the 36-minute night portion of the orbit, the Ni-Cd secondary batteries will supply ATM system power. The test results reflect battery operating characteristics and parameters relative to simulated ATM orbital test conditions. Maximum voltage, charge requirements, capacity, temperature, and cyclic characteristics are presented

    Prosecutor Circumvents the Sixth Amendment Right to Counsel with a Simple Wink and Nod, The

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    This Note argues that the Eighth Circuit\u27s decision in United States v. Johnson severely limits a defendant\u27s protections against the government\u27s intentional use of implicit, or wink and nod, agreements with undercover informants to circumvent the right to counsel. Although the court\u27s decision may further the interests of effective law enforcement, the resulting sacrifices of fair play in the adversarial justice system is too costly for society to bear

    Clinical research

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    Students\u27 Perspectives of Self-Monitoring and Self-Assessment

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    The purpose of the study was to examine the impact that self-monitoring and self-assessment had on students\u27 perspectives regarding their classroom experience. Classroom teachers are faced with the task of guiding students towards increasing their independence with academic tasks and classroom behavior on a daily basis. Many teachers also seek solutions to help increase students\u27 motivation and self-regulation skills. Self-monitoring and student self-assessment strategies are both examples of positive behavior interventions that are considered to be evidence- based strategies. These strategies can be used to help support students in increasing positive classroom behavior and decreasing negative or undesirable behavior. A considerable number of studies have been conducted on self- monitoring and self-assessment and the impact such self-management tools have on academic accuracy, classroom behavior, and productivity. This study examined five students\u27 perspectives on self-monitoring and self-assessment strategies using qualitative methods

    Positivity of Lyapunov exponents for a continuous matrix-valued Anderson model

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    We study a continuous matrix-valued Anderson-type model. Both leading Lyapunov exponents of this model are proved to be positive and distinct for all ernergies in (2,+∞)(2,+\infty) except those in a discrete set, which leads to absence of absolutely continuous spectrum in (2,+∞)(2,+\infty). This result is an improvement of a previous result with Stolz. The methods, based upon a result by Breuillard and Gelander on dense subgroups in semisimple Lie groups, and a criterion by Goldsheid and Margulis, allow for singular Bernoulli distributions
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