interfacial bonding strength of glass fiber reinforced plastic materials measured by photoelastic analysis

proposes a direct method to measure interfacial bonding strength between reinforcing fibers and resin. a wedge with a dull angle is indented to a unidirectional fiber reinforced plastic of a small fiber volume fraction and the interfacial bonding strength is measured by comparing the optical and photoelastic observations of the interfacia..

two-domain 80 degrees -twisted nematic liquid crystal display for grayscale applications

iso-contrast curves as a function of viewing angle between eight gray levels in sequence have been investigated for two-domain twisted nematic liquid crystal displays. the optimal twist angle has been found to be approximately 80 degrees . the two-domain 80 degrees -twisted nematic lcd shows a large viewing zone of +or-45 degrees in the v..

study of cobalt coating process on al/sub 2/o/sub 3/ short fiber

al/sub 2/o/sub 3/ fibers were coated with metallic cobalt by sol-gel method for the purpose of enhancing the wettability of fiber in molten metal and improving the interface properties of metal matrix composite. the al/sub 2/o/sub 3/ short fibers were suspended in a cobalt sol containing cobalt acetate, then dried and reduced in hydrogen ..

novel techniques for fabrication of y/sub 1/ba/sub 2/cu/sub 3/o/sub 7-x/ thin-film structures

the authors present two novel techniques for implementing local ablation or degradation of superconducting properties of htsc films exposed to pulsed laser radiation. in the first technique a pattern is formed by two interfering laser beams and in the other the pattern is reconstructed from a previously written hologram. the possibility o..

a membrane system for semi-aqueous defluxing

many printed wiring board assemblers and metal fabricators are investigating new cleaning agents and technologies to replace cfcs semi-aqueous cleaning is a good alternative because it provides superior performance and ecological advantages over cfc-113/methanol and aqueous cleaning technology. in the semi-aqueous process, printed wiring ..

amorphous hydrogenated silicon (a-si'h) photovoltaic thin films deposited onto ultra-low density aerogels

amorphous hydrogenated silicon (a-si'h) photovoltaic thin films have been deposited onto ultra low density (uld) silica aerogel substrates using plasma enhanced chemical vapor deposition (pecvd). the techniques and results of uld aerogel fabrication, surface treatment, thin film deposition and photovoltaic (pv) characterization are discus..

selected crystal-field effects in rare-earth systems

the author discusses effects caused by crystalline-electric field (cef) splitting of the rare earth (re) ion in re systems. the effect on the transport properties, especially the thermoelectric power when the matrix is metallic is of special interest. when the matrix is a superconductor, the cef splitting suppresses the superconductivity...

using finite-state models in instrumentation software

describes the use of finite-state models for developing instrumentation software used in a cotton gin efficiency monitoring system. a summary of the monitoring system is presented. the software finite-state models are developed and example data-processing results are demonstrated

hierarchical control using satellite microprocessors

shows some of the developments in hierarchical control and monitoring of large scale industrial installations. past, present and future trends are covered. research work using limited interconnection between satellite microcomputer controllers and a master minicomputer in a control environment are used as the basis of the paper. advantage..

radiation-induced modification of the atomic momentum distribution in a travelling-wave resonant light field

a quantum-mechanical transport equation of the boltzmann type is proposed for the momentum-distribution function of atoms in the field of a quasiresonant travelling light wave. the physical meaning of the solution is discussed in terms of the linear momentum transferred from the photons to the atoms through a succession of photon-scatteri..