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Your search keyword '"Lee, D.-Y."' showing total 19 results
Start Over Author "Lee, D.-Y." Publication Year Range More than 50 years ago
19 results on '"Lee, D.-Y."'

5. Weathering of Asphalts as Characterized by Infrared Multiple Internal Reflection Spectra

Author

Lee, D. Y. and Huang, R. J.

Abstract

Identification and prediction of durability and weathering properties of paving asphalts are problems faced by highway material engineers. Correlation between accelerated laboratory durability tests and asphalt field performance is established on four asphalts. Double beam multiple internal reflection spectra are obtained for both laboratory-aged and field samples up to 48 months. Rheological properties and chemical analyses are also made. The kinetic model for weathering is found to be Δy= T/(a+ bT) where Δyis the property change, Tis the weathering time, and aand bare constants. Weathering of asphalts is characterized by changes in absorption at wavelengths of 5.88 µm and is correlated with chemical changes and aging index defined by viscosity change.

Published
1973
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7. GAMMA AND X-RAY EFFECTS IN MULTIPLIER PHOTOTUBES

Author

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF, ZAGORITES,H. A., Lee,D. Y., NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF, ZAGORITES,H. A., and Lee,D. Y.

Abstract

Four types of multiplier phototubes were selected to represent structures in common use and to allow comparisons of radiation sensitivity between tubes of different sizes and structures. Gamma fields ranging from a few r/hr to more than 10 to the 10th power r/hr with exposures of less than 10,000 r were of principal concern. The principal radiation sensitivity of all tubes was due to radiationinduced luminescence of the face plates and glass envelopes, and tube response increased with anode luminous sensitivity. The dynode structure and its configuration did not contribute significantly to the radiation-induced response. Radiation sensitivity can be reduced significantly through the use of non-luminescent materials in tube construction.

Published
1964

19. Chronic hemodialysis in "unselected" patients.

Author

Schupak E, Sullivan JF, and Lee DY

Subjects
Adolescent, Adult, Diet, Female, Glomerulonephritis therapy, Humans, Hypertension, Renal therapy, Intelligence Tests therapy, Kidney Failure, Chronic rehabilitation, Male, Middle Aged, Nephrosclerosis therapy, Occupations, Peripheral Nervous System Diseases etiology, Pyelonephritis therapy, Kidney Failure, Chronic therapy, Renal Dialysis adverse effects
Published
1967
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