If the spider has no hair, is pitch black, has a big abdomen with a red mark on the top, and one on the bottom shaped like an hourglass, it is the dangerous black widow.
Optimizing the floater bottom shape and the operating conditions for energy extraction lead to a two-times increase in overall efficiency, even without any active control.
The RTH and SWS structures are highly reproducible because they imitate the bottom shape of the AAO membrane, but the lengths of these structures are short.
The effect of the bottom shape and the solid-phase concentration is discussed on the base of the extensive experimental program.
In this paper, the technology is used to produce three cup-type workpieces with different bottom shapes, and issues including forming process parameters and product quality are addressed.
Photochemical ablation of sintered hydroxyapatite is possible with ArF and KrF excimer lasers and the flat bottom shape of an ablated hole with sharp edge can be obtained.
The flat bottom shape of the floater is modified into a needle-like curved shape to minimize viscous losses, which leads to three-times increase in floater response, compared with the flat-bottom geometry and thus improved wave-energy capture.
The ability of this technology to withstand the sea wave impact usual for seagoing ships depends on the ship bottom shape and could be enhanced by some active flow control devices.
The results showed both the amplitude as a standard deviation of the signal and the average force magnitude were lower for the flexible S-tine than the stiff VCO-tine and the duckfoot tools connected with them created triangular and almost rectangular furrow bottom shapes, respectively.
The complete swept volume (SV), which describes the side and bottom shape of a milling cutter undergoing self-penetration, is generated by using the Gauss map method proposed in the authors' previous paper [Lee SW, Nestler A. Complete swept volume generation part I: swept volume of a piecewise C1-continuous cutter at five-axis milling via Gauss map. Computer-Aided Design 2011; 43(43: 437–43].
The heavy, black plastic bottom has groves which add strength to the bottom shape.
