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Cover Photo Lower Van Norman Dam showing concrete dropping into the lake. A considerable amount of water had been emptied from the lake at the time. i PREFACE In April 1977, President Carter issued a memorandum directing the review of federal dam safety activities by an ad hoc panel of recognized experts. In June 1979, the ad hoc interagency committee on… (More)
The internal friction of hydrated soda-lime-silica glasses with total water content (C(W)) up to 1.9 wt. % was studied by dynamic mechanical analysis (DMA) using temperature-frequency sweeps from 723 K to 273 K and from 1 s(-1) to 50 s(-1). Total water content and concentrations of H2O molecules (C(H2O)) and OH groups (C(OH)) in the DMA specimens were… (More)
We present how a single light source was used to drive multiple video projectors in a tiled display in order to achieve better tile-to-tile color and brightness uniformity. Additionally, a combined tiled-Fresnel and mask assembly was developed which further improved brightness uniformity and reduced color and brightness shading artifacts.