1,279 research outputs found
Precision sensor alignment Final report
Applying wideband autocollimator to Carco three axis test table for precision ultraviolet horizon senso
The Quantasyn, an improved quantum detector
Quantasyn provides absolute measurement of radiation flux in the range 1000 A to 4500 A and into the vacuum ultraviolet. This radiation detector cimbines the high quantum efficiency and inherent linearity of the silicon solar cell with the constant quantum response of the fluorescent organic compound liumogen
A compact spectroradiometer for solar simulator measurements
Compact spectral irradiance probe has been designed and built which uses wedge filter in conjunction with silicon cell and operational amplifier. Probe is used to monitor spectral energy distribution of solar simulators and other high intensity sources
Letter, William H. Seward to James Kelly, January 9, 1858
This letter, dated January 9, 1858, is from William H. Seward, an American politician who served as United States Secretary of State from 1861 to 1869 to James Kelly, a United States senator for Oregon from 1871 to 1877, and later Chief Justice of the Oregon Supreme Court. This note was found tipped into volume three, between pages 348-349 of Abraham Lincoln : A History by John G. Nicolay and John Hay.https://scholarsjunction.msstate.edu/fvw-manuscripts-nicolay-and-hay-documents/1019/thumbnail.jp
Letters, William H. Seward to Seth M. Gates, November 26, 1839
This handwritten letter, dated November 26, 1839, is written from William H. Seward to Seth M. Gates acknowledging the receipt of Gates\u27 letter of the November 23, 1839 and expresses regret that he has not been able to meet Gates during Gates\u27 visit to Washington. Seward goes on to state that he will give Gates\u27 recommendation for an appointment respectful consideration.https://scholarsjunction.msstate.edu/fvw-manuscripts-original-manuscripts/1186/thumbnail.jp
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Chemical and physical characterization of porous materials prepared by leaching glasses in the system Na2O-Al2O3-B2O3-F
The leachability of glasses in the system Na2O-Al2O3-B2O3-F with Al2O3 contents of about 50 wt% was investigated. It was found necessary to heat-treat the glasses at temperatures that assure not only phase separation but also formation of microcrystalline phases to prevent crumbling, swelling, and excessive restructuring of the glasses on leaching in hot dilute acetic acid solutions or hot distilled water. Chemical analysis showed that the leached glasses contain up to 96 wt% Al2O3 , based on ignited weight. Leaching rate studies show that the removal of the nonaluminous constituents by the hot leachant is diffusion-controlled. The surface areas and pore sizes of the alumina-rich porous skeleton that results on leaching are from ≈ 80 to ≈ 250 m2/g and from ≈ 6 to ≈ 15 nm, depending on heat treatment and leaching conditions. Visual examination and x-ray diffraction studies show that the heat treatment of the base glass induces phase separation and leads to the formation of crystalline phases such as Na3AlF6 and Na2Al2B2O7. The increases in density and thermal expansion of the base glasses with fluoride content on subsequent heat treatment are chiefly due to the formation of such crystalline phases
ROSAT Observations of the Vela Pulsar
The ROSAT HRI was used to monitor X-ray emission from the Vela Pulsar. Six
observations span 2-1/2 years and 3 glitches. The summed data yield a
determination of the pulse shape, and X-ray emission from the pulsar is found
to be 12 % pulsed with one broad and two narrow peaks. One observation occurred
15 days after a large glitch. No change in pulse structure was observed and any
change in X-ray luminosity, if present, was less than 3 %. Implications for
neutron star structure are discussed.Comment: To be publisned in the Astrophysical Journa
Compact spectroradiometer
Development and characteristics of spectroradiometer with wedge filters to eliminate adverse effect of pinholes in filter
Cold Exposure Exacerbates the Development of Diabetic Polyneuropathy in the Rat
Diabetic polyneuropathy (DPN) and cold-induced nerve injury share several pathogenic mechanisms. This study explores whether cold exposure contributes to the development of DPN. Streptozotocin-induced diabetic rats and controls were exposed to a room temperature (23°C) or cold environment (10°C). H-reflex, tail and sciatic motor, and sensory nerve conduction studies were performed. Analyses of sural nerve, intraepidermal nerve fibers, and skin and nerve nitrotyrosine ELISAs were performed. Diabetic animals exposed to a cold environment had an increased H-reflex four weeks earlier than diabetic room temperature animals (P = .03). Cold-exposed diabetic animals also had greater reduction in motor conduction velocities at 20 weeks (P = .017), decreased skin nerve fiber density (P = .037), and increased skin nitrotyrosine levels (P = .047). Cold exposure appears to hasten the development of DPN in the rat STZ model of diabetes. These findings support that further study into the relationship between ambient temperature and DPN is warranted
Speech of William H. Seward on the Abrogation of the Missouri Compromise
Full title: Speech of William H. Seward, on the abrogation of the Missouri Compromise, in the Kansas and Nebraska bills. Senate of the United States, February 17, 1854https://digitalcommons.cedarville.edu/pamphlet_collection/1063/thumbnail.jp
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