منابع مشابه
γ-ray burst after-glow: Confirming the cosmological fireball model
The recent detection of delayed X-ray and optical emission, “afterglow,” associated with γ-ray bursts (GRBs) supports models, where the bursts are produced by relativistic expanding blastwaves, “fireballs,” at cosmological distances. The detection of absorption lines in the optical afterglow of the GRB of 8 May 1997 confirms that the sources lie at cosmological distance. We show here that the n...
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We introduce Glow Clustering, a clustering technique inspired by the physics of light and the images of spiral galaxies. We discuss the genesis, design, and implementation of Glow Clustering. We evaluate Glow Clustering on test datasets and a well-known standard dataset. Finally, we attempt to describe the characteristics of Glow Clustering, giving some insight into the context of use where Glo...
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In single-bubble sonoluminescence, an ultrasound-driven microbubble undergoes violent oscillations and converts part of the energy of the sound field into visible light. Since its discovery ten years ago, a consistent theory of the dynamics and stability of the bubble has been developed. The approach includes the dissociation of molecular gases inside the collapsing bubble to explain striking d...
متن کاملThe Healthy Glow of Carrots
We have probably all heard that carrots are good for our health, particularly for our eye health. This is primarily due to the very high levels of vitamin A and its natural precursor, beta-carotene, in carrots. In fact, a single cup of carrots has been reported to provide over 650% of our daily needs for vitamin A, which is simply amazing. In addition to being rich in vitamin A, carrots are a v...
متن کاملGlow stick or urine sample?
The random urine sample shown in Fig. 1 was collected from a 43-year-old woman with systemic lupus erythematosus. A routine urinalysis (Aution Max AX-4280; Iris Diagnostics) revealed no remarkable findings and, specifically, was negative for protein. The corresponding urine protein concentration, however, was 448 mg/dL (reference interval, 12 mg/dL) as measured with a turbidimetric assay (Cobas...
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ژورنال
عنوان ژورنال: Nature
سال: 1884
ISSN: 0028-0836,1476-4687
DOI: 10.1038/030634a0