Damage prog[r]ession on rubble-mound breakwaters / by Jeffrey A. Melby ; prepared for U.S. Army Corps of Engineers.

Abstract

Breakwater failure modes 2 2. Flume plan (top) and profile (bottom) views for incipient motion experiment 13 2.2 Definition sketch for typical structure profile 14 2.3 Velocity time series for one wave period with H,= \2 cm, T= 1 s, J, = 24 cm and d^= 8.8 cm measured 1 cm outside the armor layer 19 2.4 Velocity vector for one wave period for armor lifting measured 1 cm outside the armor layer with H, = 8.4 cm, f= 2s,d, = 24 cm, and^^= 17 cm 20 2.5 Vertical velocity time series outside (top) and inside (bottom) armor layer with H, = 12 cm, T= 1 s,d, = 24 cm, and di = 8.8 cm for the outer measurement and di = 13 cm for the inner measurement 20 2.6 Measurement locations for vertical velocities shown in Figure 2.5 2.7 Maximum vertical velocity versus the square root of wave steepness for wave periods T= 1 and 2 s and relative depths rd = 0.36, 0.5, and 0.7 2.8 Vertical variation of vertical velocity under a steep wave fi-ont across the armor layer as a function of wave steepness 2.9 Photographs of sphere motion during a typical incipient motion experiment forPlan4 2.10 Incipient motion criterion (Equation 2.14 with v^= 61.8 cm/s) versus wave steepness 3. 1 Sketch of breakwater profile with definition of eroded area and depth of cover 3.2 216 16. PRICE CODE 17. SECURITY CLASSIFICATION

A Photoswitchable Fluorophore for the Real‐Time Monitoring of Dynamic Events in Living Organisms

“…[14] These seminalr eports demonstrated that the photoinduced activation of ac aged fluorescein-dextran conjugate can be exploited to track engrailed expression in fixed and immunolabeled embryos and suggested the possible use of these photoresponsive constructs to probe cell dynamics in living organisms. These studies stimulated similari nvestigationsw ith caged coumarin, fluorescein, and rhodamine derivatives also in barley, [15] frog, [16] sea urchin, [17] worm, [18] and zebrafish [19][20][21][22][23][24][25] embryos. The poor photobleaching resistance of the emissive state of most of these photoactivatable probes, however, restricts the exposure of the activated species to fairly short times.…”