3,757 research outputs found

    NASA Atlas of infrared solar spectrum, report 3, number 125

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    Infrared solar photometric tracings including telluric lines taken by CV-990 aircraf

    Calibration of weak 1.4 and 1.9 mu water-vapor absorptions

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    Calibration of water absorption bands in near infrared regio

    Solar comparison spectra, 1.0-2.5 mu, from altitudes 1.5-12.5 km

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    Solar and telluric infrared spectra from altitudes between 1.5 and 12.5 k

    Arizona-NASA Atlas of infrared solar spectrum, a preliminary report, number 123

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    Photometric tracings of infrared solar spectrum from NASA CV-990 jet during July-August 196

    A program of astronomical infrared spectroscopy from aircraft

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    Astronomical infrared spectroscopy from aircraf

    Thirteen-color narrow-band photometry of one thousand bright stars

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    Thirteen-color narrow-band photometry of one thousand bright star

    The 2-10 keV emission properties of PSR B1937+21

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    We present the results of a BeppoSAX observation of the fastest pulsar known: PSR B1937+21. The ~ 200 ks observation (78.5 (34) ks MECS (LECS) exposure times) allowed us to investigate with high statistical significance both the spectral properties and the pulse profile shape. The absorbed power law spectral model gave a photon index of ~ 1.7 and N_H ~ 2.3 x 10^22 cm^-2. These values explain both a) the ROSAT non-detection and b) the deviant estimate of a photon index of ~ 0.8 obtained by ASCA. The pulse profile appears, for the first time, clearly double peaked with the main component much stronger than the other. The statistical significance is 10 sigma (main peak) and 5 sigma (secondary peak). The 1.6-10 keV pulsed fraction is consistent with 100%; only in the 1.6-4 keV band there is a ~ 2 sigma indication for a DC component. The secondary peak is detected significantly only for energies above 3 / 4 keV. The unabsorbed (2-10 keV) flux is F_2-10 = 3.7 x 10^-13 erg cm^-2 s^-1, implying a luminosity of L_X = 4.6 x 10^31 Theta (d/3.6 kpc)^2 erg s^-1 and an X-ray efficiency of eta = 4 x 10^-5 Theta, where Theta is the solid angle spanned by the emission beam. These results are in agreement with those obtained by ASCA.Comment: 4 pages, 4 figures, 2 tables. To appear in the Proceedings of the 270. WE-Heraeus Seminar on Neutron Stars, Pulsars and Supernova Remnants, Jan. 21-25, 2002, Physikzentrum Bad Honnef, eds W. Becker, H. Lesch & J. Truemper. Proceedings are available as MPE-Report 27

    A high-resolution solar spectrometer for air-borne infrared observations, number 126

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    High resolution solar spectrometer for CV-990 aircraft infrared observation

    No drain, autologous transfusion drain or suction drain? A randomised prospective study in total hip replacement surgery of 168 patients

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    We performed a prospective, randomised controlled trial to assess the differences in the use of a conventional suction drain, an Autologous Blood Transfusion (ABT) drain and no drain, in 168 patients. There was no significant difference between the drainage from ABT drains ( mean : 345 ml) and the suction drain (314 ml). Forty percent of patients receiving a suction drain had a haemoglobin level less than 10 g/dL at 24 hours, compared to 35% with no drain and 28% with an ABT drain. Patients that had no drains had wounds that were dry significantly sooner, mean 3.0 days compared to a mean of 3.9 days with an ABT drain and a mean of 4 days with a suction drain. Patients that did not have a drain inserted stayed in hospital a significantly shorter period of time, compared with drains. We feel the benefits of quicker drying wounds, shorter hospital stays and the economic savings justify the conclusion that no drain is required after hip replacement
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