Unlikely docking solutions

Unfavorable interactions and unlikely docking solutions are not penalized strongly enough. General and robust methods that account for undesired features of complex structures in the derivation of scoring functions are still lacking. 

The presence of an independent safety system can limit the dependability needs of the nominal set to the requirements relative to the mission (tolerance to one fault, a goal of 99% for docking and 95% for the entire mission). Thus each piece of avionics equipment is organized in a conventional redundancy scheme (a unit in cold redundancy except for critical elements, fallible, or with long recovery time). However, unlike traditional solutions in satellites, given the objectives of continuity of service, a set of three computers in hot redundancy is used with comparison and voters distributed in each computer (to avoid failure on loss of a single centralized voter), in addition to mechanisms of error detection within each computer. 

Restraints can facilitate docking a substrate molecule to a binding site. Restraints can also facilitate the interaction of two molecules in solution. In both cases, it is unlikely that two different neutral molecules would come into van der Waals contact with each other without the use of restraints. 

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