منابع مشابه
Another Flattened Dark Halo: Polar Ring Galaxy A01360801
Knowledge of the shape of dark matter halos is critical to our understanding of galaxy formation, dynamics, and of the nature of dark matter itself. Polar ring galaxies (PRGs) | early-type galaxies deened by their outer rings of gas, dust and stars on orbits nearly perpendicular to those of the central host | provide a rare probe of the vertical-to-radial axis ratio (q = c=a) of dark halos. We ...
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We present a new technique for stabilizing an avulsed scalp during and after replantation/revascularization. We used an aluminium "halo" frame with 4 screws. This technique can rigidly stabilize an avulsed scalp and eliminate the possibility of shearing/pressure necrosis. This device can make perioperative management easier and more comfortable for the patient and caregivers.
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A 45-year-old man presented with multiple ulcerated and erythematous nodules on his scalp. The first lesion appeared on his vertex as an erythematous plaque five years ago and there was gradual increase in size and number of the lesions ever since. He was otherwise healthy. Physical examination showed multiple erythematous nodules, some were crusted, on the vertex (Fig.1). No lymphadenopathy wa...
متن کاملRing Galaxies and the Tully Fisher relation : implications for the dark halo shape
We have investigated the Tully-Fisher relation for Polar Ring Galaxies (PRGs), based on near infrared, optical and H i data available for a sample of these peculiar objects. The total K-band luminosity, which mainly comes from the central host galaxy, and the measured H i linewidth at 20% of the peak line flux density, which traces the potential in the polar plane, place most polar rings of the...
متن کاملPolar Ring Galaxies and the Tully-Fisher relation: implications for the dark halo shape
We have investigated the Tully-Fisher relation for Polar Ring Galaxies (PRGs), based on near infrared, optical and H i data available for a sample of these peculiar objects. The total K-band luminosity, which mainly comes from the central host galaxy, and the measured H i linewidth at 20% of the peak line flux density, which traces the potential in the polar plane, place most polar rings of the...
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ژورنال
عنوان ژورنال: Archives of Pediatrics & Adolescent Medicine
سال: 2002
ISSN: 1072-4710
DOI: 10.1001/archpedi.156.2.188