Zobrazeno 1 - 10
of 14
pro vyhledávání: '"William F. Avrin"'
Autor:
Bryan D. Maliken, William F. Avrin, James E. Nelson, Jody Mooney, Sankaran Kumar, Kris V. Kowdley
Publikováno v:
Annals of Hepatology, Vol 11, Iss 1, Pp 77-84 (2012)
Background. There is an ongoing clinical need for novel methods to measure hepatic iron content (HIC) noninvasively. Both magnetic resonance imaging (MRI) and superconducting quantum interference device (SQUID) methods have previously shown promise f
Externí odkaz:
https://doaj.org/article/17da53313a69457995de468557a8a407
Autor:
Alberto Fenzi, Daniela Ventura, Antonio Piga, William F. Avrin, Filomena Longo, Andrea Sboarina, Sankaran Kumar
Introduction. Tissue iron measurements with magnetic resonance imaging (MRI) have given doctors a reliable way to monitor iron overload in thalassemias, sickle-cell disease and other disorders. However, MRI remains too expensive for widespread use in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33c63c2c96fcdfc56f735e14d997779b
http://hdl.handle.net/11562/994026
http://hdl.handle.net/11562/994026
Autor:
Jody Mooney, William F. Avrin, James E. Nelson, Bryan D. Maliken, Sankaran Kumar, Kris V. Kowdley
Publikováno v:
Annals of Hepatology, Vol 11, Iss 1, Pp 77-84 (2012)
Background. There is an ongoing clinical need for novel methods to measure hepatic iron content (HIC) noninvasively. Both magnetic resonance imaging (MRI) and superconducting quantum interference device (SQUID) methods have previously shown promise f
Autor:
William F. Avrin, R. P. Merrill
Publikováno v:
Surface Science. 311:269-280
This paper presents a simple, but quantitative approach to the analysis of helium diffraction from surfaces. Instead of calculating the intensities of helium diffraction beams, we analyze the locations of the supernumerary rainbows, or oscillations i
Autor:
R. P. Merrill, William F. Avrin
Publikováno v:
Surface Science. 274:231-251
A new reconstruction of the iridium (110) surface has been characterized using helium atom diffraction, low-energy electron diffraction, and Auger electron spectroscopy. Our observations are consistent with a surface composed primarily of 〈331〉 a
Autor:
David O. Walsh, William F. Avrin, Sankaran Kumar, Brian W. Whitecotton, Robert T. Kinasewitz, Peter V. Czipott
Publikováno v:
21st EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems.
We describe a matched filter algorithm for detecting, locating and characterizing magnetic dipoles. The matched filter operates on an array of vector magnetic field measurements at an arbitrary set of orientations and points in space. For a given dip
Autor:
William F. Avrin
Publikováno v:
Nondestructive Evaluation of Aging Aircraft, Airports, and Aerospace Hardware IV.
A new eddy-current system based on low-noise magnetoresistive sensors has been developed to detect cracks and corrosion in thick, multi-layer metal structures. The new instrument has detected narrow slots as short as 6.3 mm, in the lowest layer of a
Publikováno v:
SPIE Proceedings.
Ultrasonic inspection methods are often used to detect defects in ferrous and non-ferrous metal casting processes. The finite sensor recovery time following emission of the ultrasonic pulse leads to a 'shadow zone', from the surface to a depth of abo
Autor:
William F. Avrin
Publikováno v:
Review of Progress in Quantitative Nondestructive Evaluation ISBN: 9781461380276
One of the trends in eddy-current (EC) NDE is to probe deeper by working at lower frequencies. In aircraft NDE, frequencies as low as 300 hertz have been used to inspect lap joints involving several layers of aluminum plate [1–5]. Remote-field EC w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed94c35503eff4038eae663229cb7baa
https://doi.org/10.1007/978-1-4613-0383-1_149
https://doi.org/10.1007/978-1-4613-0383-1_149
Publikováno v:
Substance Detection Systems.
Superconducting quantum interference devices (SQUIDs) are the most sensitive detectors of magnetic fields yet devised. We have used a SQUID-based system to detect nuclear magnetic resonance (NMR) in several room-temperature samples. The results demon