123,576 research outputs found
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
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
Letter, E. L. Ray to Maria R. Dodd, May 24, 1933
No full textIn this handwritten letter, dated May 24, 1933, E. L. Ray writes to Maria R. Dodd in response to a letter she sent him on May 6. Ray explains that he has nothing left of Mr. Dodd\u27s estate as the administrator. He describes each transaction of the estate and provides a detailed statement. He also updates her on his family and asks after her. An unrelated For safe Keeping envelope dated March 20, 1924 is included and has handwritten contents notes written on it.https://scholarsjunction.msstate.edu/mss-webb-collection/2620/thumbnail.jp
Letter, E. L. Ray to Maria R. Dodd, May 29, 1933
No full textIn this typed letter, dated May 29, 1933, E. L. Ray writes to Maria R. Dodd in response to a letter she sent him on May 6. Ray explains that he has nothing left of Mr. Dodd\u27s estate as the administrator. He describes each transaction of the estate and provides a detailed statement. He also updates her on his family and asks after her. This is a typed copy of a handwritten letter and statement previously dated May 24, 1933.https://scholarsjunction.msstate.edu/mss-webb-collection/2621/thumbnail.jp
Personal Papers (MS 80-0002)
No full textLetter from Ray L. Mehan to R. L. Phinney enclosing a form of estimated declared income tax for Harris Leon Kempner Jr
New insights on accretion in supergiant fast X-ray transients from XMM-Newton and INTEGRAL observations of IGR J17544-2619
No full textXMM–Newton observations of the supergiant fast X-ray transient IGR J17544?2619 are reported and placed in the context of an analysis of archival INTEGRAL/IBIS data that provide a refined estimate of the orbital period at 4.9272?±?0.0004?d. A complete outburst history across the INTEGRAL mission is reported. Although the new XMM–Newton observations (each lasting ?15 ks) targeted the peak flux in the phase-folded hard X-ray light curve of IGR J17544?2619, no bright outbursts were observed, the source spending the majority of the exposure at intermediate luminosities of the order of several 1033?erg?s?1 (0.5–10 keV) and displaying only low level flickering activity. For the final portion of the exposure, the luminosity of IGR J17544?2619 dropped to ?4?×?1032?erg?s?1 (0.5–10 keV), comparable with the lowest luminosities ever detected from this source, despite the observations being taken near to periastron. We consider the possible orbital geometry of IGR J17544?2619 and the implications for the nature of the mass transfer and accretion mechanisms for both IGR J17544?2619 and the supergiant fast X-ray transients (SFXTs) population. We conclude that accretion under the ‘quasi-spherical accretion’ model provides a good description of the behaviour of IGR J17544?2619 and suggests an additional mechanism for generating outbursts based upon the mass accumulation rate in the hot shell (atmosphere) that forms around the neutron star under the quasi-spherical formulation. Hence, we hope to aid in explaining the varied outburst behaviours observed across the SFXT population with a consistent underlying physical model
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
Accounting Hall of Fame 1999 induction: Ray J. Groves
No full textFor the induction of Ray J. Groves there were: Remarks by Dennis R. Beresford, University of Georgia; citation by Daniel L. Jensen, The Ohio State University; Response by Ray J. Groves, Ernst & Young, retired, and Legg Mason Merchant Banking, Inc
MEASUREMENTS OF L(1), L-ALPHA, L-BETA AND L-GAMMA X-RAY-FLUORESCENCE CROSS-SECTIONS IN HEAVY-ELEMENTS EXCITED BY 36.62, 43.69, 48.30, 50.20 AND 53.50 KEV PHOTONS
No full textL1, Lalpha, Lbeta and Lgamma x-ray fluorescence cross-sections were measured in Au and Pb at excitation energies of 36.62, 43.69, 48.30, 50.20 and 53.50 keV. Measurements were made using an x-ray tube with a secondary exciter system as the excitation source. The x-ray tube with a secondary target arrangement was used to obtain high intensity with a high degree of monochromatization. By using an x-ray tube it is possible to measure L x-ray fluorescence cross-sections even for low-intensity x-rays (L1). The experimental results were compared with the theoretically calculated values of L x-ray fluorescence cross-sections and a fairly good correspondence was observed
DEoptim: An R Package for Global Optimization by Differential Evolution
No full textThis article describes the R package DEoptim, which implements the differential evolution algorithm for global optimization of a real-valued function of a real-valued parameter vector. The implementation of differential evolution in DEoptim interfaces with C code for efficiency. The utility of the package is illustrated by case studies in fitting a Parratt model for X-ray reflectometry data and a Markov-switching generalized autoregressive conditional heteroskedasticity model for the returns of the Swiss Market Index.
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