WORM devices

The change of interface conductivity of another WORM device comprising an approximately 250 nm thin layer of FEDOTFSS sandwiched between Au electrodes was discussed by de Brito et al. in a different way. The authors observed delamination between Au and the polymer due to electrolysis of water and subsequent bubble formation. ... 

Fluid-pressure distribution tends to close the valve. For this reason, the smaller manually operated valves have a latching device on the handle, and the larger manually operated valves use worm gearing on the stem. This hydraulic unb ance is proportional to the pressure drop and, with line velocities exceeding 7.6 m/s (25 ft/s), is the principal component in the torque required to operate the valves. Compared with other valves for low-pressure drops, these valves can be operated by smaller hydrauhc cylinders. In this service butterfly valves with insert bodies for bolting between existing flanges with bolts that... 

Leppanen, H. and Kukkonen, V.K. 2000, Effect of sediment-chemical contact time on availability of sediment-associated pyrene and benzo[a]pyrene to oligochaete worms and semipermeable membrane devices. Aquat. Toxicol. 49 227-241. 

That s the problem, and why we might never be able to use a worm-hole. We d need a device that spews out something called exotic matter. 

Extruders are devices for loading by extrusion (qv) metals, plastics, expls and pyrotechnic compositions. For example, expls such as some Amatols, Explosive D, Compositions A C, etc which cannot be cast-loaded can be loaded by pressing them thru a steel tube by means of a worm screw working inside. 

Continuous screw extrusion is another way to form PVC plastisol propellant into the desired size and cross-sectional shape. Simultaneous curing of the propellant is also accomplished. This process has been described fully by Rossen and Rumbel (9) and is only summarized here. Mixed propellant is fed from a casting pot into the feed end of a continuous worm-screw extruder which is fitted at the discharge end of the screw with a device for constricting propellant flow. The action of the... 

Linear position Linear motion is typically driven by the use of lead screws, ball screws, or worm drives with ranges from less than a 25 mm to over 6 m. Linear sensors for position feedback in the lower range include LVDTs, magnetic, and optical encoders. For longer strokes, the linear feedback devices include encoders and magnetostrictive position transducers. Optical encoders are practical up to 2 m. Magnetostrictive position transducers can be used up to 20 m. 

Figure 10.20 Disclination pattern observed in 8CB (37°C) (top) during steady-state shearing (the worm texture) and (bottom) one minute after cessation of shearing with no polarizers. The flow direction is vertical in a torsional plate-plate device with a gap of 300 /xm and a rotation rate of 0.6 sec- the sample is observed 17 mm from the axis of rotation and Er 2 x 10. The bar on the lower figure corresponds to 500 jum. The inset on the upper figure is a laser-light (A = 633 nm) scattering pattern the width of the insert corresponds to about 30 degrees. (From Mather et al. 1996b, by permission of Taylor Francis.)...

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