Results 1 to 10 of about 7,485,767 (403)
X-Ray Emission from Jupiter, Saturn, and Earth: A Short Review [PDF]
, 2006 Jupiter, Saturn, and Earth - the three planets having dense atmosphere and a well developed magnetosphere - are known to emit X-rays. Recently, Chandra X-ray Observatory has observed X-rays from these planets, and XMM-Newton has observed them from Jupiter and Saturn.
Bhardwaj, Anil
arxiv +5 more sources
Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks [PDF]
The Astrophysical JournalX-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue +2 more
doaj +2 more sources
Photonic band gap and x-ray optics in warm dense matter [PDF]
, 2009 Photonic band gaps for the soft x-rays, formed in the periodic structures of solids or dense plasmas, are theoretically investigated. Optical manipulation mechanisms for the soft x-rays, which are based on these band gaps, are computationally demonstrated.
Joannopoulos J. D. +4 more
arxiv +3 more sources
X-RAYS AND X-RAY DIAGNOSIS. [PDF]
JAMA: The Journal of the American Medical Association, 1897 A great discovery, great in the sense of discovering a fundamental principle or a fact profoundly modifying existing theories or hypotheses, is not infrequently found to be of most value, from the purely utilitarian standpoint, in some branch of science,
P. M. Jones
semanticscholar +3 more sources
On the X-rays of permutations [PDF]
Electronic Notes in Discrete Mathematics, Vol. 20, 2005, pp.
193-203, 2005 The X-ray of a permutation is defined as the sequence of antidiagonal sums in the associated permutation matrix. X-rays of permutation are interesting in the context of Discrete Tomography since many types of integral matrices can be written as linear combinations of permutation matrices.
Bebeacua, Cecilia +3 more
arxiv +4 more sources
Signatures of X-rays in the early Universe [PDF]
, 2012 [abridged] With their long mean free paths and efficient heating of the intergalactic medium (IGM), X-rays could have a dramatic impact on the thermal and ionization history of the Universe.
A. Mesinger, A. Ferrara, D. Spiegel
semanticscholar +4 more sources
Experimental study on hard X-rays emitted from metre-scale negative discharges in air [PDF]
, 2015 We investigate the development of meter long negative discharges and focus on their X-ray emissions. We describe appearance, timing and spatial distribution of the X-rays. They appear in bursts of nanosecond duration mostly in the cathode area. The spectrum can be characterized by an exponential function with 200 keV characteristic photon energy.
P. Kochkin +3 more
arxiv +3 more sources
The structure of some crystals as indicated by their diffraction of X-rays
, 1913 A new method of investigating the structure of a crystal has been afforded by the work of Laue* and his collaborators on the diffraction of X-rays by crystals.
W. L. Bragg
openalex +2 more sources
Journal of High Energy Astrophysics, 2017 We have analyzed the atomic and molecular gas using the 21 cm HI and 2.6/1.3 mm CO emissions toward the young supernova remnant (SNR) RCW 86 in order to identify the interstellar medium with which the shock waves of the SNR interact.
Atsushi Nishimura +2 more
exaly +3 more sources
Finding Covid-19 from Chest X-rays using Deep Learning on a Small Dataset [PDF]
arXiv.org, 2020 Testing for COVID-19 has been unable to keep up with the demand. Further, the false negative rate is projected to be as high as 30% and test results can take some time to obtain.
L. Hall +3 more
semanticscholar +1 more source