Hull probe

A convex hull is a molecular surface that is determined by running a planar probe over a molecule. This gives the smallest convex region containing the molecule. It also serves as the maximum volume a molecule can be expected to reach. 

Figure 4.1 Double-wheel sampling system and head of chemical ground probe on the back of the XM1135 Stryker NBCRV Hull. (Image modified from original supplied by the US Army.)...

Any problems in the setup, startup, and operation of the CBMS also were recorded in the course of the field tests. These observations are important to improving the system before it goes into production. The field tests revealed three problems. The protective screens over electronics cooling air inlets and outlets on the CBMS II housing were damaged by operator activities in the vehicles and required reinforcement. The ground probe head, which protrudes outside the vehicle hull, required more power to maintain the correct temperature under colder or wetter weather conditions. Finally the automated mass and frequency calibration procedure was not reliable in the field and required modification. These problems have been corrected and are being incorporated in the LRIP units. 

Fig. 1. Geometry concepts tor analyzing protein cavity. The protein bulk is represented in black, probes as little spheres. The convex Hull ot the protein is represented in dash line. The plain vectors emerging trom the probe in grey are pointing towards the bulk solvent, whereas the dash vectors will encounter protein atoms within a radius of 8 A (radius of the influence circle m dot line).Jhe probe in front ot the clett defines the degree of precision in represenfing the molecular surface.

Fig I. Dweci-currem oscilloscope probe based on Hull effect... 

Linjewile T, Hull A, Agarwal P. Optical probe measurements of the temperature of burning particles in fluidized beds. Fuel 73 1880-1886, 1994. 

Fig. 10.31 Portable reference electrode probe, (a) Surveys of electrode potential distribution on ships hulls, submerged offshore pipelines, oilrigs, platforms, jetties and docks are often carried out by manual diver-held probes, (b) These battery-powered devices usually incorporate a tip spike, a silver/silver chloride reference electrode and a digital voltmeter (dvm) within a tough, insulated and sealed pistol. The shroud surrounding the electrode element defines the sensing area. These probes are used to depths of approximately 300 m and are capable of measuring to a precision of 1 mV. Rechargeable Ni-Cd batteries are used. Sharpened tips may be used to penetrate coatings. (Courtesy Corrintec (UK) Ltd.)...

---