402,134 research outputs found
Portrait Groups: R (Ray?), D, V, and E (Edie?)
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/247881171164
Item: [1981.0081.00276] "Portrait Groups: R (Ray?), D, V, and E (Edie?)
Portrait Groups: Ray, Dorothy Wright, V, and R
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/247880171163
Item: [1981.0081.00275] "Portrait Groups: Ray, Dorothy Wright, V, and R
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Personal Papers (MS 80-0002)
No full textLetter from Ray I. Mehan to Joseph R. Bertig discussing Daniel W. Kempner's suggestion regarding gifted stocks of the Bertig Company
Personal Papers (MS 80-0002)
No full textLetter from Ray I. Mehan to Joseph R. Bertig discussing Daniel W. Kempner's suggestion regarding gifted stocks of the Bertig Company
Time Resolved Two Dimensional X-Ray Densitometry of a Two Phase Flow Downstream of a Ventilated Cavity
No full textTo measure the void fraction distribution in gas-liquid flows, a two-dimensional x-ray densitometry system was developed. This system is capable of acquiring a two-dimensional projection with a 225 cm2 area of measurement through 21 cm of water. The images can be acquired at rates on the order of 1 kHz. Common sources of error in x-ray imaging, such as x-ray scatter, image distortion, veiling glare, and beam hardening were considered, and mitigated. The measured average void fraction was compared success fully to that of a phantom target and found to be within 1%. To evaluate the performance of the new system, the flow in and downstream of a ventilated nominally two-dimensional partial cavity was investigated and compared to measurements from dual tip fiber optical probes and high speed video. The measurements were found to have satisfactory agreement for void fractions above 5% of the selected void fraction measurement range.Office of Naval Research under grant N00014-10-1-097
Ray Hart
No full text"R.A.A.F. 110 M.F.C.U 134322 Ray "Boss" Hart in the bush at 19 Mile."Royal Australian Air Force. 110 Mobile Fighter Control Unit. 134322 Ray "Boss" Hart in the bush at 19 Mile
Ray Shallis
No full text"439790 [F]/Sgt. Ray. Shallis RAAF Fenton. Batchelor. NADZAB. Morotai 21. Squadron. 82. Wing B24. Liberators."439790 Flight Sergeant Ray. Shallis. Royal Australian Air Force. Fenton. Batchelor. NADZAB. Morotai 21. Squadron. 82. Wing B24. Liberators
No. 32, Ray R. Canning, interview by Everett L. Cooley
No full textTranscript (55, 55, 40 pages) of three interviews by Everettt L. Cooley with Ray R. Canning, University of Utah sociology professor, on November 2, 16, 1983. This interview is part of the Everett L. Cooley Oral History Project, interview nos. 32-A, 32-B, and 35Canning (b. 1920) recalls his background in Wyoming, his experiences in WW II, his work at Brigham Young University during the administration of Ernest Wilkinson, and his career at the University of Utah in the Department of Sociology and as dean of the College of Arts and Letters during the 1960s. He also discusses the administrations of Presidents A. Ray Olpin and James Fletcher. Interviewer: Everett L. Coole
X-ray detector based on a bulk micromachined photodiode combined with a scintillating crystal
No full textThis paper reports the design, fabrication, assembly and testing of
a x-ray detector based on a bulk micromachined photodiode (BMMPD)
with a cavity filled with a scintillating crystal. The x-ray photons
that reach the detector are first converted to visible light by the
scintillating crystal. The visible light is then detected by the BMMPD,
producing an electric current with value proportional to the
incident x-ray intensity. Tests were performed using two x-ray setups:
an experimental one and a professional one.
The first was powered with a maximum voltage of 35kV, and a
current ranging to 1mA and the second was powered with voltages from
40kV to 60kV and currents ranging from 10mA to 55mA
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