7,071 research outputs found

    An improved dual-frequency technique for the remote sensing of ocean currents and wave spectra

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    A two frequency microwave radar technique for the remote sensing of directional ocean wave spectra and surface currents is investigated. This technique is conceptually attractive because its operational physical principle involves a spatial electromagnetic scattering resonance with a single, but selectable, long gravity wave. Multiplexing of signals having different spacing of the two transmitted frequencies allows measurements of the entire long wave ocean spectrum to be carried out. A new scatterometer is developed and experimentally tested which is capable of making measurements having much larger signal/background values than previously possible. This instrument couples the resonance technique with coherent, frequency agility radar capabilities. This scatterometer is presently configured for supporting a program of surface current measurements

    Passive Mode-Locking of Monolithic InGaAs/AlGaAs Double Quantum Well Lasers at 42GHz Repetition Rate

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    Pulse trains with a 42GHz repetition rate were generated by monolithic InGaAs/AlGaAs double quantum well lasers at a wavelength of 985 [angstroms]. The cavity was electrically divided into three regions, one providing gain and the other two providing saturable absorption. The optical modulation has a depth greater than 98% and full-width at half-maximum under 6ps, and bias conditions for sustained mode-locking are determined

    The Linear Boltzmann Equation as the Low Density Limit of a Random Schrodinger Equation

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    We study the evolution of a quantum particle interacting with a random potential in the low density limit (Boltzmann-Grad). The phase space density of the quantum evolution defined through the Husimi function converges weakly to a linear Boltzmann equation with collision kernel given by the full quantum scattering cross section.Comment: 74 pages, 4 figures, (Final version -- typos corrected

    Broadband Tuning (170nm) of InGaAs Quantum Well Lasers

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    The wavelength tuning properties of strained InGaAs quantum well lasers using an external grating for feedback is reported. Tunable laser oscillation has been observed over a range of 170 nm, between 840 and 1010 nm, under pulsed current excitation. The optimal conditions for broadband tunability for the InGaAs lasers are different from GaAs lasers, which is attributed to a difference in spectral gain curves. Together with an optimised GaAs quantum well laser the entire region between 740 and 1010 nm is spanned

    What You Should Know When Caring for a Senior Parent

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    The Unsettled State of Pregnancy Discrimination Claims Under the Florida Civil Rights Act of 1992

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    Florida\u27s employment law practitioners are no doubt aware that employment discrimination actions may be brought under both Title VII of the Civil Rights Act of 1964 (Title VII), and under the Florida Civil Rights Act of 1992 (FCRA). Both sections contain similar verbiage, and for years, courts have held the Florida Civil Rights Act be interpreted in conformity with Title VII. However, the statutes differ in an important respect: While Title VII expressly forbids sex discrimination on the basis of pregnancy, the Florida Civil Rights Act of 1992 does not

    Pretrial Restraint of Assets: Lawful Governmental Interference with the Right to Counsel of Choice?

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    In this, the year of the 50th anniversary of Gideon v. Wainwright, we\u27re read a lot of articles discussing the right to counsel, but none, as far as I recall, discussing the right to counsel of choice. While it may be true that there is no right to counsel of choice for those who are appointed counsel, what about those who are fortunate enough to be able to retain counsel? Isn\u27t being entitled to counsel of your choice a logical extension of Gideon

    Management of Hallucinations and Psychosis in Parkinson's Disease

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    This is the author's accepted manuscript, made available with permission of the publisher. The final published version is available from ScienceDirect: http://dx.doi.org/10.1016/j.amjopharm.2010.08.004 (See the Published Version link, above.)BACKGROUND: Hallucinations and psychosis are common in patients with Parkinson's disease (PD), with reported prevalences of up to 48% and 80%, respectively. However, few randomized, double-blind, placebo-controlled trials evaluating the treatment options have appeared in the literature. The studies that have been published were complicated by lack of agreement on the diagnosis of psychosis in PD, poor completion rates, mixed populations that included dementia, and other issues. Several reviews, guidelines, and consensus statements have sought to establish standards for treating these symptoms of PD. In 2006, the American Academy of Neurology (AAN) published a practice guideline (based on articles published up to 2004) for management of depression, psychosis, and dementia in patients with PD. Since then, a number of relevant studies have been published. OBJECTIVE: The purpose of this article was to review data that have appeared in the literature since publication of the AAN guideline regarding the management of hallucinations and psychosis in PD. METHODS: A literature search of the PubMed, CINAHL, and PsychInfo databases was conducted for human studies published in English from January 2004 to June 2010. All clinical studies were included except case reports and case series. Studies with <20 participants were also excluded. Search terms included psychosis, hallucinosis, hallucination, delusion, Parkinson, atypical antipsychotic, neuroleptic, aripiprazole, clozapine, olanzapine, quetiapine, risperidone, and ziprasidone. RESULTS: Thirteen studies were included in the review: 3 studies of clozapine, 7 studies of quetiapine, 2 head-to-head trials comparing quetiapine and clozapine, and 1 noncomparative trial of clozapine or quetiapine interventions. Most of the studies included participants with a mean age in the early to mid 70s and a mean duration of PD typically >10 years. CONCLUSIONS: Results of the identified studies suggested that patients with PD might benefit from long-term clozapine therapy. Results of the quetiapine studies were conflicting. However, no statistically significant difference in effectiveness was found between quetiapine and clozapine in comparative trials. The significance of the differences in treatment responses between patients with dementia and those without dementia remains unclear, and it was not possible to draw conclusions for or against other atypical antipsychotics because of insufficient evidence. Further studies are needed to address the methodologic issues in the current trials and to assess safety issues in larger cohorts

    Battling International Piracy of the Copyright Industries Through NAFTA

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    The scope of this paper will cover the United States\u27 attempts to protect its copyright industries of computer software, movie, and music under the auspices of NAFTA. Specifically, coverage will discuss the general scope of copyright protection given to the software, music, and movie industries under NAFTA, and then focus on United States relations with Canada and Mexico under NAFTA

    The Importance of Federal Habeas Review as a Means to Challenge Florida\u27s Death Penalty Sentencing and Drug Possession Statutes

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    The importance of Federal habeas review of Florida\u27s death penalty and drug possession statues should become apparent in light of the current legal and political landscape surrounding Florida\u27s death penalty scheme. When a State is unable to independently comply with the mandates of the United States Constitution, the citizens of that State have no option other than seek redress in Federal court
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