1,753 research outputs found

    A Penny for the Court\u27s Thoughts? The High Price of Judicial Elections

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    In this article, Mr. Bronson Bills explores the meaning of the term judicial independence, tracks the history of the concept in colonial America, and discusses the importance of judicial independence to free and just society. Mr. Bills then examines judicial elections in light of the 2006 Nevada Supreme Court election for Seat G-a judicial election in which the incumbent Justice Nancy Becker was defeated by the much less qualified Nevada State District Court Judge Nancy Saitta (who was the most reversed District Judge in Nevada with no academic or legal publications prior to taking the bench) after Saitta misrepresented the holding of a single unpopular civil tax decision, in which Becker concurred, to the voting public-and argues that the Nevada Supreme Court election illustrates many of the reasons why States should abandon elections in favor of judicial appointment

    Generalised balance equations for charged particle transport via localised and delocalised states: Mobility, generalised Einstein relations and fractional transport

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    A generalised phase-space kinetic Boltzmann equation for highly non-equilibrium charged particle transport via localised and delocalised states is used to develop continuity, momentum and energy balance equations, accounting explicitly for scattering, trapping/detrapping and recombination loss processes. Analytic expressions detail the effect of these microscopic processes on the mobility and diffusivity. Generalised Einstein relations (GER) are developed that enable the anisotropic nature of diffusion to be determined in terms of the measured field-dependence of the mobility. Interesting phenomena such as negative differential conductivity and recombination heating/cooling are shown to arise from recombination loss processes and the localised and delocalised nature of transport. Fractional transport emerges naturally within this framework through the appropriate choice of divergent mean waiting time distributions for localised states, and fractional generalisations of the GER and mobility are presented. Signature impacts on time-of-flight current transients of recombination loss processes via both localised and delocalised states are presented.Comment: 21 pages, 4 figure

    Efficient numerical solution of the time fractional diffusion equation by mapping from its Brownian counterpart

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    The solution of a Caputo time fractional diffusion equation of order 0<α<10<\alpha<1 is expressed in terms of the solution of a corresponding integer order diffusion equation. We demonstrate a linear time mapping between these solutions that allows for accelerated computation of the solution of the fractional order problem. In the context of an NN-point finite difference time discretisation, the mapping allows for an improvement in time computational complexity from O(N2)O\left(N^2\right) to O(Nα)O\left(N^\alpha\right), given a precomputation of O(N1+αlnN)O\left(N^{1+\alpha}\ln N\right). The mapping is applied successfully to the least-squares fitting of a fractional advection diffusion model for the current in a time-of-flight experiment, resulting in a computational speed up in the range of one to three orders of magnitude for realistic problem sizes.Comment: 9 pages, 5 figures; added references for section

    A Penny for the Court\u27s Thoughts? The High Price of Judicial Elections

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    In this article, Mr. Bronson Bills explores the meaning of the term judicial independence, tracks the history of the concept in colonial America, and discusses the importance of judicial independence to free and just society. Mr. Bills then examines judicial elections in light of the 2006 Nevada Supreme Court election for Seat G-a judicial election in which the incumbent Justice Nancy Becker was defeated by the much less qualified Nevada State District Court Judge Nancy Saitta (who was the most reversed District Judge in Nevada with no academic or legal publications prior to taking the bench) after Saitta misrepresented the holding of a single unpopular civil tax decision, in which Becker concurred, to the voting public-and argues that the Nevada Supreme Court election illustrates many of the reasons why States should abandon elections in favor of judicial appointment

    Third-order transport coefficients for localised and delocalised charged-particle transport

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    We derive third order transport coefficients of skewness for a phase-space kinetic model that considers the processes of scattering collisions, trapping, detrapping and recombination losses. The resulting expression for the skewness tensor provides an extension to Fick's law which is in turn applied to yield a corresponding generalised advection-diffusion-skewness equation. A physical interpretation of trap-induced skewness is presented and used to describe an observed negative skewness due to traps. A relationship between skewness, diffusion, mobility and temperature is formed by analogy with Einstein's relation. Fractional transport is explored and its effects on the flux transport coefficients are also outlined.Comment: 11 pages, 3 figure

    Effect of Control Mode and Test Rate on the Measured Fracture Toughness of Advanced Ceramics

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    The effects of control mode and test rate on the measured fracture toughness of ceramics were evaluated by using chevron-notched flexure specimens in accordance with ASTM C1421. The use of stroke control gave consistent results with about 2% (statistically insignificant) variation in measured fracture toughness for a very wide range of rates (0.005 to 0.5 mm/min). Use of strain or crack mouth opening displacement (CMOD) control gave approx. 5% (statistically significant) variation over a very wide range of rates (1 to 80 m/m/s), with the measurements being a function of rate. However, the rate effect was eliminated by use of dry nitrogen, implying a stress corrosion effect rather than a stability effect. With the use of a nitrogen environment during strain controlled tests, fracture toughness values were within about 1% over a wide range of rates (1 to 80 micons/m/s). CMOD or strain control did allow stable crack extension well past maximum force, and thus is preferred for energy calculations. The effort is being used to confirm recommendations in ASTM Test Method C1421 on fracture toughness measurement

    Effects of Aqueous Solutions on the Slow Crack Growth of Soda-Lime-Silicate Glass

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    The slow crack growth (SCG) parameters of soda-lime-silicate were measured in distilled and saltwater of various concentrations in order to determine if the presence of salt and the contaminate formation of a weak sodium film affects stress corrosion susceptibility. Past research indicates that solvents affect the rate of crack growth; however, the effects of salt have not been studied. The results indicate a small but statistically significant effect on the SCG parameters A and n at high concentrations; however, for typical engineering purposes, the effect can be ignored

    Effect of Control Mode and Test Rate on Fracture Toughness of Advanced Ceramics

    Get PDF
    The effects of control mode and rate on the fracture toughness of ceramics were measured by using chevron-notched flexure specimen in accordance with ASTM C1421. The use of stroke control gave consistent results with about 2% variation in measured fracture toughness for a very wide range of rates (0.005 to 0.5 mm/min). Use of strain or CMOD control gave ~5% variation over a very wide range of rates, with the measurements being a function of rate. However, the effect was eliminated by use of dry nitrogen, implying a stress corrosion effect rather than a stability effect. With the use of nitrogen for strain control, fracture toughness values were within about 1% over a wide range of rates (1 to 80 /s). CMOD or strain control did allow stable crack extension well past maximum load, and thus is preferred for energy calculations. The effort is being used to confirm recommendations in ASTM International standard C1421 on fracture toughness measurement

    Migration Patterns of Double-crested Cormorants Wintering in the Southeastern United States

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    Migration patterns of Double-crested Cormorants (Phalacrocorax auritus) wintering in the southeastern U.S. are poorly understood. Movement data were analyzed from 28 cormorants captured in Alabama, Arkansas, Louisiana and Mississippi and equipped with satellite transmitters. Four (three immature, one adult) cormorants did not migrate and stayed in the southeastern U.S. throughout the year. During spring, cormorants captured in Alabama migrated east of the Mississippi River and primarily west of the Appalachian Mountains. Cormorants from Arkansas, Louisiana and Mississippi migrated north along the Mississippi River Valley, the Missouri River Valley and/or the Ohio River Valley. The earliest departure for spring migration was 26 March, whereas the latest departure was 12 May. Adult cormorants departed for spring migration earlier than immature cormorants. The average departure date for fall migration was 1 October. Mean duration of spring migration was twelve days, and cormorants traveled an average of 70 km per day

    Acoustic sensor engineering evaluation test report

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    Two types of one-inch diameter sound pressure level sensors, which are candidates for monitoring ambient noise in the shuttle orbiter crew compartment during rest periods, were exposed to temperature, passive humidity, and vibration. One unexposed sensor of each type served as a reference unit. Except for the humidity exposures, each of the three capacitive microphones was individually tested in sequence with the essential voltage power supply and preamplifier. One unit exibited anomalous characteristics after the humidity exposure but returned to normal after being dried in an oven at 115 deg for two hours. Except for the humidity exposures, each of the three piezoelectric microphones was individually tested with a laboratory type amplifier. Two apparent failures occurred during these tests. The diaphragm on one was found ruptured after the fourth cycle of the humidity test. A second sensor showed an anomaly after the random vibration tests at which time its sensitivity was consistent at about one-half its former value
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