analysis of a concentric distribution optical fiber bundle. i development of a sensor of gloss measurement of polished metal surface by means of fiber optics

describes an optical fibre sensor for estimating the degree of surface finish of curved and flat metal surfaces. the optical fibre bundle is arranged with the transmitting section at the centre surrounded by the receiving section

formation of silicon nitride fibers by nitriding silicon in a current of ammonia

chemical, x-ray, and crystal-optical analysis are used to investigate the process of formation of silicon nitride fibers during the nitriding of silicon with ammonia. it is shown that the yield and morphology of the fibers are determined by the reaction temperature and time and the purity of the original silicon. the fibers which are form..

production of separation-nozzle systems for uranium enrichment by a combination of x-ray lithography and galvanoplastics

x-ray lithography using synchrotron radiation has been applied in a multi-step process for the production of plastic moulds to be used in the fabrication of separation nozzles by electrodeposition for characteristic dimensions of a few microns a total height of the nozzle structure of about 400 mum has been achieved. structural details of..

baymetex-metallized textile planar structure reflecting radar and microwaves

bayer ag has developed a microwave reflecting textile for easier location of objects floating on the sea surface, specifically for sea rescue purposes. basic requirement was for reflection loss to be below 0.5 db, preferably below 0.2 db, to produce good contrast with a heavy sea background. fibres used in the material are metallized by a..

studies of the molecular motions of large penetrant molecules in solid polymers by electron paramagnetic resonance spin-probe techniques

the determination of rotational correlation times for spin probes in polymers is reviewed, with emphasis on the relationships between rotational and translational motions. data on the behavior of three different spin-probe molecules in polyamide and polyester films and fibers are examined in detail. it is concluded that saturation phenome..

electrical phenomenology of the keratins of human skin

the keratins may be loosely defined as those proteins containing sulfur in the form of cystine and cysteine. understanding the permeability and especially the hydration characteristics of the keratins is of commercial importance to the textile, wool and leather industries, and of both commercial and clinical importance to those concerned ..

ir-ft spectroscopic study of surface structure of quartz fiber

the spectra of original and modified quartz fibers with specific surface areas of 1-5 m/sup 2//g have been measured. the position and intensity of the absorption bands of molecularly adsorbed water (3420 cm/sup -1/) and silanol groups in the fine pores (3650 cm/sup -1/) are changed by chemical modification, vacuum-thermal treatment, or de..

special hybrid package for laser semiconductor dice in optical telecommunications

describes a special hybrid package which complies with the following specifications' the two laser emissive areas free for coupling two optical fibers: this package must have a very low thermal resistance: this package must be compatible with laser dice of any size: and for die bonding and wiring, this package must be locally plated with ..

strength and interfacial reaction of high modulus carbon fiber-reinforced aluminium alloys

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interpenetrating network of metal polymer composite (inmpc)

current interest in conductive plastics has triggered several approaches in utilizing fillers to transform plastics into a higher-strength conductive structure. metal fillers and fibers have been used in polypropylene composites of higher electrical conductivities. recently, attempts have been made to improve the mechanical properties of ..