Zobrazeno 1 - 10
of 131
pro vyhledávání: '"U. Ewert"'
Publikováno v:
EPR Imaging and In Vivo EPR ISBN: 9781351071888
This chapter demonstrates the possibilities of using electron paramagnetic resonance (EPR) imaging as a useful tool for the characterization of diffusion and coking processes in zeolite powders and in pelletized zeolite catalysts. The measurements ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77b2ecbd5f2c0cdf84cd6f4fca893c69
https://doi.org/10.1201/9781351071888-26
https://doi.org/10.1201/9781351071888-26
Publikováno v:
Russian Journal of Nondestructive Testing. 47:696-700
Methods of nonlinear backprojection that are suitable for the solution of problems in tomography with small number of views are considered. Their comparison with the classical back-projection methods is performed. Examples of reconstructions are give
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84bf7d7e07f03a720c02e345bde3e20f
https://doi.org/10.1134/s1061830911100044
https://doi.org/10.1134/s1061830911100044
Publikováno v:
AIP Conference Proceedings.
Correctly modeling the continuous photon spectrum of X-ray tubes requires detailed knowledge of the probability distribution of electron properties at the time of X-ray photon creation, in particular electron energy, depth within the target, and dire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da1d935e660d483c5036fac61f049202
https://doi.org/10.1063/1.4914656
https://doi.org/10.1063/1.4914656
Publikováno v:
Schweizer Archiv für Neurologie und Psychiatrie. 154:329-338
Up to 10% of healthy people complain about sleepiness during daytime. The results are reduced productivity and injuries at work or while driving a motor vehicle, which may lead to severe consequences for the afflicted andsociety in general. According
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4952fa120b0cfc50f7b7eb9f70d257b5
https://doi.org/10.4414/sanp.2003.01411
https://doi.org/10.4414/sanp.2003.01411
Autor:
V. A. Baranov, U. Ewert
Publikováno v:
Russian Journal of Nondestructive Testing. 47:707-709
A group-theoretical approach to the interpretation of the “flaw” concept is proposed based on statistical structure-oriented methods of spatial filtering of images developed by the authors. The local Lee group in the theoretical-group filters was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b551ed0a17b470c9a931cfb44b5f57a
https://doi.org/10.1134/s1061830911100056
https://doi.org/10.1134/s1061830911100056
Publikováno v:
AIP Conference Proceedings.
The new standard ISO 17636–2:2013 “NDT of welds: Radiographic testing - Part 2: X- and gamma ray techniques with digital detectors” describes a complex procedure for film replacement by phosphor imaging plates and digital detector arrays. RT mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0454ec6e92dc203cd2a93488f33d36e
https://doi.org/10.1063/1.4865044
https://doi.org/10.1063/1.4865044
Publikováno v:
Journal of Magnetic Resonance, Series B. 105:52-57
The development of a new highly sensitive electron paramagnetic resonance probe suitable for measuring low oxygen concentrations in biological cells and tissues is reported. This probe consists of a char prepared from glucose. This char exhibits an E
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c48d3d607d84c2dd39047bd3e8e6db64
https://doi.org/10.1006/jmrb.1994.1099
https://doi.org/10.1006/jmrb.1994.1099
Autor:
G.-R. Jaenisch, A. Deresch, C. Bellon, U. Ewert, W. Przybilla, Donald O. Thompson, Dale E. Chimenti
Publikováno v:
AIP Conference Proceedings.
Determining scatter ratios at high energies (>∼1 MeV) presents challenges not immediately obvious from measurements at conventional X‐ray energies. This includes reduced attenuation even in heavy elements as well as a stronger forward bias of sca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4f68b4512b212d685824190d5e08ab9
https://doi.org/10.1063/1.3591895
https://doi.org/10.1063/1.3591895
Autor:
U. Ewert, K. Heyne, U. Zscherpel, M. Jechow, K. Bavendiek, Donald O. Thompson, Dale E. Chimenti
Publikováno v:
AIP Conference Proceedings.
The presently active standards on Computed Radiography (CR) need a major revision. It was observed by many users that the image quality for class B of EN 14784-2 is not achievable under the same exposure conditions as used for film exposure. A mathem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff63538a21da768bca45cde7d84e1265
https://doi.org/10.1063/1.3591892
https://doi.org/10.1063/1.3591892
Autor:
U. Ewert, J. Beckmann, L. S. von Chrzanowski, G. Brekow, D. Brackrock, Donald O. Thompson, Dale E. Chimenti
Publikováno v:
AIP Conference Proceedings.
A time domain spectrometer in the range of 0.5–2 THz was used for time of flight (ToF) measurements of THz pulses for imperfection detection in non metallic materials. The measurements were performed in comparison to the established ultra sound pul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c300fbdb0cf70eec263a351436488442
https://doi.org/10.1063/1.3591898
https://doi.org/10.1063/1.3591898