Results 21 to 30 of about 574,603 (197)

Sources of X-rays from galaxies [PDF]

, 2011
Galactic X-ray emission is a manifestation of various high-energy phenomena and processes. The brightest X-ray sources are typically accretion-powered objects: active galactic nuclei and low- or high-mass X-ray binaries.
Liu, Persic, Porquet, Q. Daniel Wang, Revnivtsev, Revnivtsev, Sazonov, Tüllmann, Weźgowiec, Yuan, Zhang   +10 more
core   +1 more source

Internet hand x-rays: A comparison of joint space narrowing and erosion scores (Sharp/Genant) of plain versus digitized x-rays in rheumatoid arthritis patients

BMC Musculoskeletal Disorders, 2002
Background The objective of the study is to examine the reliability of erosion and joint space narrowing scores derived from hand x-rays posted on the Internet compared to scores derived from original plain x-rays.
Watson Margaret M, Cabarrus Luis P, Montgomery Gregory P, Arbillaga Hector O, Martin Liam, Edworthy Steven M   +5 more
doaj   +1 more source

Single shot diffraction of picosecond 8.7-keV x-ray pulses

Physical Review Special Topics. Accelerators and Beams, 2012
We demonstrate multiphoton, single shot diffraction images of x rays produced by inverse Compton scattering a high-power CO_{2} laser from a relativistic electron beam, creating a pulse of 8.7 keV x rays.
F. H. O’Shea, O. Williams, G. Andonian, S. Barber, Y. Sakai, J. B. Rosenzweig, I. Pogorelsky, M. Fedurin, K. Kusche, V. Yakimenko   +9 more
doaj   +1 more source

X-ray variability of GRS 1915+105 during the low-hard state observed with the Indian X-ray astronomy experiment (IXAE) [PDF]

, 1997
The galactic superluminal transient X-ray source GRS 1915+105 was observed with the pointed proportional counters (PPCs) onboard the Indian satellite IRS-P3 during 1996 July 23-27.
Agrawal, P.C., Kasturirangan, K., Marar, T.M.K., Paul, Biswajit, Rao, A.R., Seetha, S., Vahia, M.N., Yadav, J.S.   +7 more
core   +2 more sources

Recasting the nature of INTEGRAL hard X-ray transients previously classified as active galactic nuclei

Astronomy & Astrophysics
We present new broad-band X-ray results aimed at the identification and characterization of four poorly studied hard X-ray transients discovered by INTEGRAL: IGR J16426+6536, IGR J09446−2636, IGR J21268+6203, and IGR J02447+7046. The key properties and X-
Sguera V., Sidoli L.
doaj   +1 more source

X-ray Observations at Gaisberg Tower

Atmosphere, 2018
We report the occurrence of X-rays at ground level due to cloud-to-ground flashes of upward-initiated lightning from Gaisberg Tower, in Austria, which is located at an altitude of 1300 m.
Pasan Hettiarachchi, Vernon Cooray, Gerhard Diendorfer, Hannes Pichler, Joseph Dwyer, Mahbubur Rahman   +5 more
doaj   +1 more source

Pulmonary abnormality screening on chest x-rays from different machine specifications: a generalized AI-based image manipulation pipeline

European Radiology Experimental, 2023
Background Chest x-ray is commonly used for pulmonary abnormality screening. However, since the image characteristics of x-rays highly depend on the machine specifications, an artificial intelligence (AI) model developed for specific equipment usually ...
Heejun Shin, Taehee Kim, Juhyung Park, Hruthvik Raj, Muhammad Shahid Jabbar, Zeleke Desalegn Abebaw, Jongho Lee, Cong Cung Van, Hyungjin Kim, Dongmyung Shin   +9 more
doaj   +1 more source

X-ray-Induced Heating in the Vicinity of the X-ray Interaction Point

Applied Sciences, 2023
When X-rays pass through a material, radiation damage occurs, and heat is generated at the X-ray interaction point, which can then be transferred around the X-ray irradiation site. This X-ray-induced heat transfer can affect the temperature of the sample
Jangwoo Kim, Ki Hyun Nam
doaj   +1 more source

Gold and Silver joining technologies in the Moche Tombs “Señor de Sipán” and “Señora de Cao jewelery [PDF]

, 2018
About 200 gold and silver funerary ornaments from the Moche tombs “Señor de Sipán” and “Señora de Cao” were analyzed to determine their metallurgic characteristics. Of particular interest was the question about the gold-silver joining process.
Brunetti, Antonio, Bustamante, Angel, Cesareo, Roberto, Fernandez, Arabel, Gigante, Giovanni E., Jordán, Regulo Franco, Lopes, Ricardo Tadeu, Ridolfi, Stefano   +7 more
core   +1 more source

Stellar flare detection in XMM-Newton with gradient-boosted trees

Astronomy & Astrophysics
Context. The EXTraS project, based on data collected with the XMM-Newton observatory, provides us with a vast amount of light curves for X-ray sources. For each light curve, EXTraS also provides us with a set of features.
Pasquato Mario, Marelli Martino, De Luca Andrea, Salvaterra Ruben, Carenini Gaia, Belfiore Andrea, Tiengo Andrea, Esposito Paolo   +7 more
doaj   +1 more source