1,418 research outputs found

    Quantum correlations and classical resonances in an open chaotic system

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    We show that the autocorrelation of quantum spectra of an open chaotic system is well described by the classical Ruelle-Pollicott resonances of the associated chaotic strange repeller. This correspondence is demonstrated utilizing microwave experiments on 2-D n-disk billiard geometries, by determination of the wave-vector autocorrelation C(\kappa) from the experimental quantum spectra S_{21}(k). The correspondence is also established via "numerical experiments" that simulate S_{21}(k) and C(\kappa) using periodic orbit calculations of the quantum and classical resonances. Semiclassical arguments that relate quantum and classical correlation functions in terms of fluctuations of the density of states and correlations of particle density are also examined and support the experimental results. The results establish a correspondence between quantum spectral correlations and classical decay modes in an open systems.Comment: 10 pages, 5 eps figures, "Quantum chaos Y2K" Nobel symposium, to appear in Physica Script

    Lymphomania

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    Lymphomania is a blog that follows the author\u27s journey from diagnosis of Hodgkin\u27s lymphoma through treatment, relapse, more treatment, and relapse again. It looks at the bright, the dark, and the funny side of illness while challenging the reader\u27s sense of his own mortality. This blog (www.seegirlwrite.com) will continue indefinitely and will also eventually become the backbone of a creative nonfiction collection of essays

    Postmortem distribution of zolpidem in aviation accident victims.

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    The purpose of the study was to confirm there is a consistent postmortem distribution of zolpidem in postmortem blood and body tissues, and/or fluids making it possible to estimate zolpidem blood concentrations from fluid and tissue concentrations. The samples for the study were zolpidem-positive fatalities located in the CAMI ToxFlo database at the FAA's Bioaeronautical Sciences Research Laboratory. A UPLC/MS method was developed and validated. The LDR, LOD, LOQ, accuracy, precision, and matrix effect were evaluated. The specimens were analyzed for the distribution of zolpidem. The results of this study confirmed there is a consistent postmortem distribution of zolpidem found in the spleen, kidney, and lung; making it possible to roughly estimate, zolpidem blood concentrations from these tissues

    MODEL OT' TRADITIONAL MARKETS COMMUNITY EMPOWERMENT IN GOOD GOVERNANCE APPROACH (Studies of the Bunder Market Merchants Empowerment in Healthy Markets Program in Sragen Regency of Indonesia)

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    This research on model of taditional markets community empowerment in good govemance approach of Brmder Healthy Market Program in Sragen Crty is aimed to analyze, interpr& and descri* several objectives, which are: l). the implementation of a Healthy Market Program; 2). the role of local government, privab, and market community erough Heal6y Mar*ets Program; and 3). develop an alternative model of market community empowerment in good govemance perspective. Ttis study used qualiative research method in which data were collected through obrervations, indepth interviews, documentation and foaused group discussion techniques. Qualit*ive data analysis war chosen as lte technique of data analysis. Tho Bund€r Mad(et Community Empowerment Program is a partnenhip prograln among the three parties namely: Sragen Regency Local Government, private sector which was Yayasan Danamon Peduli (YDP) througb its CSR, and the merchants of Bunder tradition*t rnarket community by participating in the program. The findings showed tLat the process of marlcet community empowermsnt tltrough Healthy Martet Program has b€en established srrccessfirlly in governance perspective. It can be witnessed from the habitual changes of the mar*et commuoity, with inparticular, has been heading toward helth behaviors such as hygienic awarensss and waste management

    SUR 202T.51: Surgical Procedures Lab - Butte

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    Tunneling Proximity Resonances: Interplay between Symmetry and Dissipation

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    We report the first observation of bound-state proximity resonances in coupled dielectric resonators. The proximity resonances arise from the combined action of symmetry and dissipation. We argue that the large ratio between the widths is a distinctive signature of the multidimensional nature of the system. Our experiments shed light on the properties of 2D tunneling in the presence of a dissipative environment.Comment: Five pages, plain RevTeX; five encapsulated PostScript figures. Submitted to Physical review Letter

    Fit Into College II: Physical Activity and Nutrition Behavior Effectiveness and Programming Recommendations

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    Purpose: To determine whether residency (living on campus versus off campus) was related to the effects of Fit into College on students’ health behaviors, and to understand interns’ perceptions of their roles in mentoring their trainees. Design: Pre-experimental, one-group, pretest-posttest design and a posttest focus group interview. Setting: University-offered health and internship courses. Subjects: Twenty-four students (trainees) participated in the intervention, nine of whom lived on campus. Five student-interns served as their mentors. Intervention: Fit into College was a 14-week intervention in which trainees teamed up with an intern to improve and/or maintain healthy nutrition and physical activity behaviors. Measures: Trainees’ nutrition and physical activity behaviors and perceptions were quantitatively assessed through surveys at preintervention and postintervention. Interns’ mentoring perceptions were qualitatively assessed through a focus group interview after the intervention. Analysis: Two-factor repeated measure ANOVAs and qualitative theme identification. Results: Regardless of their residency location, the trainees’ perceptions of the health benefits of eating fruits and vegetables improved during the intervention. However, for trainees living on campus, the intervention was not effective in increasing the number of fruits and vegetables consumed or the planning for food preparation. The interns perceived that they did not have adequate access to healthy foods, the knowledge or skills to prepare healthy foods, or the competency to teach food preparation strategies to their trainees. For trainees living on campus, the intervention was more effective in decreasing perceived exercise barriers than trainees living off campus. Conclusion: Future iterations of Fit into College may focus on 1) improving college students’ planning and preparation of healthy foods, 2) segmenting trainees into more homogeneous groups for the interns to tailor their areas of expertise (campus vs. off-campus and/or freshman vs. upperclass students), and 3) collaborating with university-partners to improve environmental conditions to promote physical activity and healthy nutrition

    Effects of Diet, Aerobic Exercise, or Both on Non-HDL-C in Adults: A Meta-Analysis of Randomized Controlled Trials

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    Purpose. To use the meta-analytic approach to examine the effects of diet (D), aerobic exercise (E), or both (DE) on non-high-density lipoprotein cholesterol (non-HDL-C) in adults. Methods. Randomized controlled trials in adults ≥18 years of age were included. A mixed-effect model was used to combine effect size (ES) results within each subgroup and to compare subgroups (Qb). Heterogeneity was examined using the Q and I2 statistics, and 95% confidence intervals (CI) were also calculated. Statistical significance was set at P≤0.05, while a trend for statistical significance was set between P>0.05, and ≤0.10. Results. A statistically significant exercise minus control group decrease in non-HDL-C was found for DE (7 ESs, 389 participants, x¯=-11.1 mg/dL, 95%  CI=−21.7 to −0.6, P=0.04, Q=2.4, P=0.88, I2=0%), a trend for the D group (7 ESs, 402 participants, x¯=−8.5 mg/dL, 95%  CI=−18.6 to 1.6, P=0.10, Q=0.76, P=0.99, I2=0%), and no change for the E group (7 ESs, 387 participants, x¯=3.0 mg/dL, 95%   CI=−7.1 to 13.1, P=0.56, Q=0.78, P=0.99, I2=0%). Overall, no statistically significant between-group differences were found (Qb=4.1, P=0.12). Conclusions. Diet combined with aerobic exercise may reduce non-HDL-C among adults in some settings
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