14 research outputs found

    Planetary Transits of the Trans-Atlantic Exoplanet Survey- Candidate TrES-1b

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    The AAVSO compiled 10,560 CCD observations of the suspected exoplanet transit object TrES-1b covering seven complete transit windows, three windows of partial coverage, and coverage of baseline non-transit periods. Visual inspection of the light curves reveals the presence of slight humps at the egress points of some transits. A boot strap Monte Carlo simulation was applied to the data to confirm that the humps exist to a statistically significant degree. However, it does not rule out systemic effects which will be tested with campaigns in the 2005 observing season

    Shock heterogeneity and shock history of the recently found ordinary CsĂĄtalja chondrite in Hungary

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    Shock impact-produced mineral alterations in two thin sections of the recently found Csátalja H4 ordinary chondrite meteorite are compared. Peak positions of Raman and infrared spectra of mineral clasts show peaks shifted in wavenumber relative to unshocked reference minerals, and both peak shifts and FWHM values seem to correlate to each other. In the less shocked thin section (Csátalja-1) a more monomineralic and homogeneous composition indicate shock pressures of <15 GPa, while the more shocked Csátalja-2 indicates shock pressure in the 15–17 GPa range. The highest identified infrared peak position shifts range between –48 and +28 cm–1 with peak broadening between 60–84 cm–1 in the case of the feldspars, which, together with sulphide globules, were produced by the shock itself. Feldspar spectra could be detected only by FTIR spectroscopy, but in most cases (above the S3 shock level) the mixed type of the pyroxene-feldspar spectra (both peaks in the same spectra) is in agreement with the shock-produced secondary feldspars. These grains are located around crystalline borders, and probably formed by selective melting, due to shock annealing. In reconstruction of the shock history, an early fragmentation by a lower shock effect and a later increased shock level-related vein and melt pocket formation occurred, with subsequent shock annealing; temporal reconstruction of the shock event is possible only in part. The joint usage of Raman and infrared spectroscopy provided useful insights into the shock-produced changes and their spatial inhomogeneity, while shocked feldspar could be better detected by infrared than by the Raman method

    Shock heterogeneity and shock history of the recently found ordinary CsĂĄtalja chondrite in Hungary

    No full text
    Shock impact-produced mineral alterations in two thin sections of the recently found Csátalja H4 ordinary chondrite meteorite are compared. Peak positions of Raman and infrared spectra of mineral clasts show peaks shifted in wavenumber relative to unshocked reference minerals, and both peak shifts and FWHM values seem to correlate to each other. In the less shocked thin section (Csátalja-1) a more monomineralic and homogeneous composition indicate shock pressures of <15 GPa, while the more shocked Csátalja-2 indicates shock pressure in the 15–17 GPa range. The highest identified infrared peak position shifts range between –48 and +28 cm–1 with peak broadening between 60–84 cm–1 in the case of the feldspars, which, together with sulphide globules, were produced by the shock itself. Feldspar spectra could be detected only by FTIR spectroscopy, but in most cases (above the S3 shock level) the mixed type of the pyroxene-feldspar spectra (both peaks in the same spectra) is in agreement with the shock-produced secondary feldspars. These grains are located around crystalline borders, and probably formed by selective melting, due to shock annealing. In reconstruction of the shock history, an early fragmentation by a lower shock effect and a later increased shock level-related vein and melt pocket formation occurred, with subsequent shock annealing; temporal reconstruction of the shock event is possible only in part. The joint usage of Raman and infrared spectroscopy provided useful insights into the shock-produced changes and their spatial inhomogeneity, while shocked feldspar could be better detected by infrared than by the Raman method

    A Cumulative Stress and Training Continuum Model: A Multidisciplinary Approach to Unexplained Underperformance Syndrome

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    This article provides an understanding of the unexplained underperformance syndrome (UPS; Budgett, Newsholme, Lehmann, et al. 19994. Budgett, R, Newsholme, E, Lehmann, M, Sharp, C, Jones, D, Peto, T, Collins, D, Nerurkar, R and White, P. 1999. Redefining the overtraining syndrome as the unexplained underperformance syndrome. British Journal of Sports Medicine, 34: 67–68. View all references) and the problems surrounding the current presentation of it. This was done in terms of processes and outcomes. Recommendations for a more stringent usage of terms was provided. Based on Selye’s (1956)27. Selye, H. 1956. The Stress of Life, New York: McGraw-Hill. View all references General Adaptation Theory and a model described by KenttĂ€ and HassmĂ©n (199816. KenttĂ€, G and HassmĂ©n, P. 1998. Overtraining and recovery—a conceptual model. Sports Medicine, 26: 1–26. View all references; 200217. Kereszty, A. 1971. “Overtraining”. In Encyclopaedia of Sports Sciences and Medicine, Edited by: Larson, LA and Herrmann, DE. 218–222. New York: Macmillan. View all references), a Cumulative Stress and Training Continuum Model was put forward that incorporates both the continuum paradigm and the supercompensation cycle model of training. These models, combined with a multidisciplinary approach, provide a useful framework for understanding the processes and outcomes of athletic performance in general and the unexplained underperformance syndrome in particular. The Cumulative Stress and Training Continuum Model emphasizes the complex interactions between the many factors affecting UPS and their weblike, cumulative, and synergistic relationships. Such an approach assists in explaining how seemingly nonsignificant factors in their own right could exert disproportionate importance and effect. Also, it emphasizes the individual variability and susceptibility to UPS as well as the fluctuations within a given individual. The unique contribution of the Cumulative Stress and Training Continuum Model put forward in the present article is that it is a truly inclusive and holistic model for addressing UPS
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