Association between exercise blood pressure, Na+ ingestion and Cold Pressor Test: A Pilot Study

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"Ours is a business civilization" : the University of Oklahoma Bass Business History Collection with annotated bibliography of fifty treasures

Imagine having the opportunity to explore oversize seventeenth-century parchment edicts of kings, stacks of gold-plated coins, boxes of 1930s stock certificates, and modern ledger books; to review inestimable incunabula from before Gutenberg; and to flip through personal files of business tycoons, maps of railroads, and scores of historically significant photographs. That was the opportunity afforded Oxford University scholar Chris Nitschke when, in 2017, he visited the University of Oklahoma Bass Business History Collection to find the specific archival resources he needed.“I first heard of the Bass Business History Collection when I researched archival collections for my dissertation,” said Nitschke. “I admit I was surprised at first to learn that Oklahoma University would hold the archives of J. & W. Seligman & Co., a private bank founded in the nineteenth century. Yet it [traveling to Oklahoma] gave me a chance to shake things up a little bit in terms of destinations on my East Coast–heavy research trip.”Nitschke came to the University of Oklahoma specifically to research the material in the Seligman Archives, one of the most important segments of the Bass Collection. “The Seligman Archives had looked very useful the first time I had looked at the online finding aid, and getting here did not change things. A more detailed printed finding aid allowed me to locate some additional material I would have overlooked otherwise. The material I targeted all along—original letter books by the partners of Seligman’s international bank—proved incredibly valuable.”After a few days of research in Bass, Nitschke found what he was looking for: “Fortunately they [the Seligman letter books] covered just about the time period I was interested in . . . the Harry Bass Collection is in excellent shape.”The experience of this international researcher is not unique to students and other researchers: the Bass Business Collection is a hidden gem of immense value.This publication, printed by The University of Oklahoma Printing Services, is issued by the University of Oklahoma. 2500 copies have been prepared and distributed at no cost to the taxpayers of the State of Oklahoma.N

125 Years of Books to Internet: The Quasquicentennial of the University of Oklahoma Libraries

Settled upon the Great Plains in 1890, the University of Oklahoma has a long and distinguished history. And the University of Oklahoma Libraries have as storied a history as the University they are nestled within. From one bookcase of fifty-three books brought in by train by the first president, to the current holdings of more than six million volumes, the University of Oklahoma Libraries have grown and changed along with the twists and turns of America. One hundred and twenty-five years after their founding—through wars, depressions, the Dust Bowl, budget cuts, microfiche, and now the Internet—the University of Oklahoma Libraries have not only persevered but prospered, and have grown into the largest research library in the state as well as one of the premiere libraries in the United States.This publication, printed by The University of Oklahoma Printing Services, is issued by the University of Oklahoma. 2500 copies have been prepared and distributed at no cost to the taxpayers of the State of Oklahoma.N

Cluster Winds Blow along Supercluster Axes

Within Abell galaxy clusters containing wide-angle tailed radio sources, there is evidence of a ``prevailing wind'' which directs the WAT jets. We study the alignment of WAT jets and nearby clusters to test the idea that this wind may be a fossil of drainage along large-scale supercluster axes. We also test this idea with a study of the alignment of WAT jets and supercluster axes. Statistical test neighbours indicate no alignment of WAT jets towards nearest clusters, but do indicate approximately 98% confidence in alignment with the long axis of the supercluster in which the cluster lies. We find a preferred scale for such superclusters of order 25 Mpc $h^{-1}$.Comment: Latex, 5 pages, with 5 postscript figures. To be published in MNRAS. Slight revisions to coincide with journal text. Linked to color image at http://kusmos.phsx.ukans.edu/~melott/images/A2634SUW.jp

The Effect of Variability on the Estimation of Quasar Black Hole Masses

We investigate the time-dependent variations of ultraviolet (UV) black hole mass estimates of quasars in the Sloan Digital Sky Survey (SDSS). From SDSS spectra of 615 high-redshift (1.69 < z < 4.75) quasars with spectra from two epochs, we estimate black hole masses, using a single-epoch technique which employs an additional, automated night-sky-line removal, and relies on UV continuum luminosity and CIV (1549A) emission line dispersion. Mass estimates show variations between epochs at about the 30% level for the sample as a whole. We determine that, for our full sample, measurement error in the line dispersion likely plays a larger role than the inherent variability, in terms of contributing to variations in mass estimates between epochs. However, we use the variations in quasars with r-band spectral signal-to-noise ratio greater than 15 to estimate that the contribution to these variations from inherent variability is roughly 20%. We conclude that these differences in black hole mass estimates between epochs indicate variability is not a large contributer to the current factor of two scatter between mass estimates derived from low- and high-ionization emission lines.Comment: 76 pages, 15 figures, 2 (long) tables; Accepted for publication in ApJ (November 10, 2007

Selection of Thermal Worst-Case Orbits via Modified Efficient Global Optimization

Efficient Global Optimization (EGO) was used to select orbits with worst-case hot and cold thermal environments for the Stratospheric Aerosol and Gas Experiment (SAGE) III. The SAGE III system thermal model changed substantially since the previous selection of worst-case orbits (which did not use the EGO method), so the selections were revised to ensure the worst cases are being captured. The EGO method consists of first conducting an initial set of parametric runs, generated with a space-filling Design of Experiments (DoE) method, then fitting a surrogate model to the data and searching for points of maximum Expected Improvement (EI) to conduct additional runs. The general EGO method was modified by using a multi-start optimizer to identify multiple new test points at each iteration. This modification facilitates parallel computing and decreases the burden of user interaction when the optimizer code is not integrated with the model. Thermal worst-case orbits for SAGE III were successfully identified and shown by direct comparison to be more severe than those identified in the previous selection. The EGO method is a useful tool for this application and can result in computational savings if the initial Design of Experiments (DoE) is selected appropriately

Understanding the Lunar System Architecture Design Space

Based on the flexible path strategy and the desire of the international community, the lunar surface remains a destination for future human exploration. This paper explores options within the lunar system architecture design space, identifying performance requirements placed on the propulsive system that performs Earth departure within that architecture based on existing and/or near-term capabilities. The lander crew module and ascent stage propellant mass fraction are primary drivers for feasibility in multiple lander configurations. As the aggregation location moves further out of the lunar gravity well, the lunar lander is required to perform larger burns, increasing the sensitivity to these two factors. Adding an orbit transfer stage to a two-stage lunar lander and using a large storable stage for braking with a one-stage lunar lander enable higher aggregation locations than Low Lunar Orbit. Finally, while using larger vehicles enables a larger feasible design space, there are still feasible scenarios that use three launches of smaller vehicles

Spectral Variability of Quasars in the Sloan Digital Sky Survey. II: The C IV Line

We examine the variability of the high-ionizaton C IV line in a sample of 105 quasars observed at multiple epochs by the Sloan Digital Sky Survey. We find a strong correlation between the change in the C IV line flux and the change in the line width, but no correlations between the change in flux and changes in line center and skewness. The relation between line flux change and line width change is consistent with a model in which a broad line base varies with greater amplitude than the line core. The objects studied here are more luminous and at higher redshift than those normally studied for variability, ranging in redshift from 1.65 to 4.00 and in absolute r-band magnitude from roughly -24 to -28. Using moment analysis line-fitting techniques, we measure line fluxes, centers, widths and skewnesses for the C IV line at two epochs for each object. The well-known Baldwin Effect is seen for these objects, with a slope beta = -0.22. The sample has a median intrinsic Baldwin Effect slope of beta = -0.85; the C IV lines in these high-luminosity quasars appear to be less responsive to continuum variations than those in lower luminosity AGN. Additionally, we find no evidence for variability of the well known blueshift of the C IV line with respect to the low-ionization Mg II line in the highest flux objects, indicating that this blueshift might be useful as a measure of orientation.Comment: 52 pages, 14 figures, accepted for publication in Ap

Seeing and Being Seen as a Management Learning and Education Scholar: Rejoinder to "Identifying Research Topic Development in Business and Management Education Research Using Legitimation Code Theory"

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