Results 141 to 150 of about 339,109 (364)

3D Core-Scale Organic and Mineral Material Characterization of Source Rocks with Simultaneous Neutron and X-Ray Imaging [PDF]

open access: bronze, 2017
Weichang Li   +5 more
openalex   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff   +9 more
wiley   +1 more source

Compact objects in active galactic nuclei and X-ray binaries

open access: yes, 2007
In this thesis I study the inner-most regions of Active Galactic Nuclei (AGN) using the reverberation mapping technique, and neutron star low-mass X-ray binaries in quiescence using X-ray observations. Using the 13-year optical monitoring data for the
Cackett, Edward M.
core  

Streaking and splashing: design of a grazing incidence x-ray streak camera and time-resolved measurements of the structure of water [PDF]

open access: yes, 2006
The performance of cesium iodide photocathodes has been characterized for use with grazing incidence soft x-rays. The total electron yield and pulsed quantum efficiency has been measured in a reflection geometry as a function of photon energy (100 eV to ...
Lowney, Donnacha
core  

A Study of Spectral Variability Between Flaring and Nonflaring State in M74 X-1

open access: yesThe Astrophysical Journal
We conducted an extensive long-term spectral and timing study of the ultraluminous X-ray (ULX) source M74 X-1, using data taken between 2001 and 2021 by Chandra and XMM-Newton X-ray observatories.
Aman Upadhyay   +2 more
doaj   +1 more source

GMRT observations of the field of INTEGRAL X-ray sources. II [PDF]

open access: bronze, 2006
M. Pandey   +4 more
openalex   +1 more source

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel   +6 more
wiley   +1 more source

Very high energy gamma ray astronomy and non pulsating low mass x-ray binaries [PDF]

open access: yes, 1991
This thesis is concerned with non pulsating Low Mass X-Ray Binaries as Very High Energy γ-ray sources, in particular Scorpius X-1; the brightest of these objects in X-rays, and the most likely to be detectable at energies above 250 GeV.
Carraminana, Alberto, Carraminana, A
core  

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