Means and method of measuring viscoelastic strain Patent

Photographic method for measuring viscoelastic strain in solid propellants and other material

Laser Diode Induced Lighting Modules

Laser diodes have the potential of becoming the light engines of future lighting technology since they have negligible efficiency droop factor, unlike light emitting diodes. This study demonstrates the possibility of laser diodes coupled to phosphor targets being used as a solid state lighting system with high power applications. It was revealed that white light emitting modules with efficiency of up to 217 lumens per watt based on laser diodes can currently be made and upon further development of laser diode technology and relevant phosphor materials there is room for further improvements. The report also demonstrates the ability of this technology to produce a tailored emission spectrum for a given specific requirement. Two test lamp prototypes were made using laser diodes and phosphor targets and their emission characteristics were investigatedBrunel University London & EPSRC grant No. EP/K504208/

Miniature stress transducer Patent

Miniature solid state, direction sensitive, stress transducer design with bonded semiconductive piezoresistive element for sensing residual stresse

Long-term aging of elastomers: Chemical stress relaxation of fluorosilicone rubber and other studies

Aerospace applications of elastomers are considered, including: propellant binders, bladder materials for liquid propellant expulsion systems, and fuel tank sealants for high-speed aircraft. A comprehensive molecular theory for mechanical properties of these materials has been developed but has only been tested experimentally in cases where chemical degradation processes are excluded. Hence, a study is being conducted to ascertain the nature, extent, and rate of chemical changes that take place in some elastomers of interest. Chemical changes that may take place in the fluorosilicone elastomer, LS 420, which is regarded as a fuel and high-temperature-resistant rubber are investigated. The kinetic analysis of the chemical stress relaxation and gel permeation chromatography studies comprise the major portion of the report

Studies on Ethylene Oxide-freon 12 Decontamination and Dry-Heat Sterilization Cycles

Ethylene oxide-Freon decontamination and heat sterilization cycle

Effects of ethylene oxide-Freon 12 decontamination and dry heat sterilization procedures on polymeric products

Effects of ethylene oxide-Freon 12 decontamination and dry heat sterilization procedures on potential spacecraft polymeric material

Numerical study of quantum percolation

We study the density of states and the optical conductivity of the classical double-exchange model on a site percolated cluster.Comment: 2 pages, 2 figures, submitted to SCES 200

Contribution of thermal noise to the line width of Josephson radiation from superconducting point contacts

Contribution of thermal noise to line width of Josephson radiation from superconducting point contact