Abstract: Weak links in electrically continuous superconductors are detected by observing the effect of magnetic field modulation on the dc resistance of superconductors. The phase detected response to the magnetic modulation shows a peak at T.sub.c. The presence of a second peak at temperatures below T.sub.c, and concomitantly the appearance of a tail on the low temperature end of the dc resistance vs temperature curve indicates the presence of weak links in the superconductor.

Abstract: A hierarchical and recursive system for classifying, identifying, describing and analyzing images and the related apparatus are disclosed wherein a digital image is partitioned into subarrays, the content of each subarray is compared to memory elements stored within memory, and if a match occurs, the name of the matched memory element is assigned to the subarray. When all subarrays have been named, a symbolic image whose pixel elements are the assigned names, is formed which is the image for the next level of identification. If no match occurs, a new memory element and appropriate corresponding name are created and added to the memory stack.

Abstract: Optical devices using an organic charge transfer salt as the switching and storage media are disclosed. Generally, a light beam of a given intensity directed to a film of certain organic charge transfer salts causes the illuminated area to change from a first to a second state. This electrochemical process is reversible with heat energy transforming the illuminated area back into the first state. The first and second states have identifiably different optical and electrical properties. The organic charge transfer salt is used to fabricate an erasable or permanent optical memory and a threshold on bistable optoelectronic switch.

Abstract: This invention relates to an apparatus and method for regulating the exposure of active surfaces by covering the surface with an erodible protection coating. The rate of erosion is controlled by chemical and/or physical means so that the surface is progressively and gradually exposed.

Abstract: A multistate organic optical storage medium is disclosed, wherein an optical beam can switch any "data storage spot" on said optical storage medium into three or more memory states. The optical storage medium may consist of a mixture of bistate switching modules, or it may consist of large delocalized amphoteric molecules. The illuminated area of said optical storage medium will undergo an electrochemical topactic redox reaction which will cause certain moieties in the illuminated area to change oxidation state. By changing the intensity of the optical "write" beam the illuminated area can be switched to a plurality of specific states each state having a unique set of oxidation species. An optical/spectroscopic means is used to identify the presence of oxidation species and to "read" the data stored.

Abstract: A waterbase coating composition for use in protecting the threads of metal studs during automotive production line phosphating, electrostatic painting and welding. Composition also provides controlled lubricity as well as even torque during the tightening sequency of fasteners by robotics.

Abstract: A heat shrinkable polymer material is particularly adapted for implanted biomedical use. A polycrystalline polymer is irradiated to produce crosslinking of its intramolecular structure to thereby impart viscoelasticity. The material is biocompatible and suitable for implanted use, from the standpoints of very low toxicity, ability to retain structural integrity and being non-carcinogenic and, moreover, is heat shrinkable at a temperature compatible with such implanted use.

Abstract: Water reducible, dispersible coating composition comprising: organic vehicle containing wax compounds of low oil content, neopentyl ester, carboxylic acid, amine, alcoholic coupling solvent, water. Vehicle is preferably amine salt of organic wax of low oil content, long-chain carboxylic acid and neopentyl ester, e.g. C30 acid and pentaerythritol.

Abstract: Water reducible, dispersible, corrosion resistant coating compositions comprising organic vehicle containing wax compounds, organic esters, carboxylic acid, amines, alcohol coupling agent and water and methods for their manufacture are disclosed and demonstrated to be useful for protecting metals, e.g. ferrous alloys, from corrosion.