The existing tsunami warning system is based primarily on registration of underwater earthquake events. Unfortunately this approach has intrinsic drawbacks: the relationship between quake force and tsunami intensity/propagation is complicated and not clear. Another approach relies on direct measurement of tsunami wave height by detection of pressure change near the bottom. Such a buoy network i...

Obstacle detection is a key component of autonomous systems. In particular, when dealing with large robots in unstructured environments, robust obstacle detection is vital. In this paper, we describe an obstacle detection methodology which combines two complimentary methods: adaptive color segmentation, and stereo-based color homography. This algorithm is particularly suited for environments in...

The palladium(II)-catalysed addition of arylboronic acids to vinylaziridines has been developed. This reaction proceeds via an insertion/ring-opening process to provide (Z)-allylsulfonamides preferentially. This stereoselectivity is complimentary to existing methods that typically proceed via a SN2' mechanism to yield (E)-allylsulfonamides. Electron-deficient arylboronic acids were the optimum ...

It is likely that the uses for virtual reality (VR) will coincide with applications that rapid prototyping systems have already been used for. VR, with the ability to model real life environments, presents an ideal base for the design and development of new manufactured products. As a method of producing physical models directly from 3D CAD systems, rapid prototyping technology has also been us...

In the present note, exact upper bounds on the sums of chromatic and achromatic numbers of complimentary graphs are determined Which prove in particular a conjecture by Hedetniemi (1966) and imply a bound due to Nordhaus and Gaddum (1956).

The polypeptide corresponding to the amino acid sequence from residue 6 through 47 in staphylococcal nuclease has been synthesized by the solid-phase method. The synthetic product closely resembles the corresponding native polypeptide in both physical and chemical properties. The synthetic peptide may be recombined with the complimentary native peptide comprising residues 49 through 149 to form...