Fundamental studies of the metallurgical, electrical, and optical properties of gallium phosphide Quarterly progress report, 1 Jan. - 31 Mar. 1968

Metallurgical, electrical, and optical properties of gallium phosphide crystal

Fundamental studies of the metallurgical, electrical, and optical properties of gallium phosphide Quarterly progress report, Apr. 1 - Jun. 30, 1966

Studies of metallurgical, electrical, and optical properties of gallium phosphid

SPAR improved structure/fluid dynamic analysis capability

The capability of analyzing a coupled dynamic system of flowing fluid and elastic structure was added to the SPAR computer code. A method, developed and adopted for use in SPAR utilizes the existing assumed stress hybrid plan element in SPAR. An operational mode was incorporated in SPAR which provides the capability for analyzing the flaw of a two dimensional, incompressible, viscous fluid within rigid boundaries. Equations were developed to provide for the eventual analysis of the interaction of such fluids with an elastic solid

Propellant slosh coupling with bending Interim report

Vibrational characteristics of large liquid propellant space vehicl

Erosion-corrosion behaviour of Zirconia WC-6Co, WC-6Ni and SS316

The current study investigates a ceramic, two cermets and a metal under solid-liquid impingement with 3.5% NaCl and 150mg/l hydraulic fracturing sand at two extreme angles of impact, 90° and 20°. The materials tested were Zirconia, sintered WC-6Co, sintered WC-6Ni and SS316. Each material was exposed to a testing regime using re-circulating impinging jet apparatus with a velocity of 19m/s and one hour duration. The electrochemical properties of the materials were investigated in-situ through anodic and cathodic polarisation and application of cathodic protection. Post experimental analysis of the degraded surface was completed using Scanning Electron Microscopy (SEM) and Optical 3D Imaging. Zirconia exhibited a brittle response to erosion-corrosion testing with the mass loss at 90° being fifty times greater than the negligible mass loss at 20°. WC-6Co and WC-6Ni both outperformed SS316 under all solid-liquid impingement erosion-corrosion testing regimes. WC-6Ni exhibited slightly better erosion-corrosion resistance over WC-6Co at both 90° and 20°. SS316 had the best corrosion resistance and showed passivation during anodic polarisations in solid-liquid impingement conditions. The nickel binder increased the corrosion resistance of WC-6Ni over WC-6Co. Cathodic protection was successfully applied on sintered WC-6Co and SS316 isolating the key components of erosion-corrosion

Fundamental studies of the metallurgical, electrical, and optical properties of gallium phosphide Quarterly progress report, 1 Apr. - 30 Jun. 1969

Barrier diodes formed by nickel evaporation on undoped gallium phosphide by vertical liquid epitax

Fundamental studies of the metallurgical, electrical, and optical properties of gallium phosphide Quarterly progress report, 1 Jul. - 30 Sep. 1968

Schottky barrier diode performance tests, Be doping of GaP, and S, Se, and Te diffusion into GaA

Detecting 6 MV X-rays using an organic photovoltaic device

An organic photovoltaic (OPV) device has been used in conjunction with a flexible inorganic phosphor to produce a radiation tolerant, efficient and linear detector for 6 MV Xrays. The OPVs were based on a blend of poly(3-hexylthiophene-2,5-diyl) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM). We show that the devices have a sensitivity an order of magnitude higher than a commercial silicon detector used as a reference. Exposure to 360 Grays of radiation resulted in a small (2%) degradation in performance demonstrating that these detectors have the potential to be used as flexible, real-time, in vivo dosimeters for oncology treatments. (C) 2009 Elsevier B.V. All rights reserved

Fundamental studies of the metallurgical, electrical and optical properties of gallium arsenide Quarterly progress report, 1 Oct. - 31 Dec. 1969

Melting points of GaP-metal systems and growth of GaP by vertical liquid epitax

Adult Attachment as a Risk Factor for Intimate Partner Violence

This study examined the relationship between intimate partner violence and adult attachment in a sample of 35 community couples. Both partners’ attachment anxiety and attachment avoidance were examined simultaneously as predictors of male-perpetrated verbal and physical intimate partner violence. Results from hierarchical regression analyses indicated high levels of female attachment anxiety predicted high levels of male-perpetrated verbal and physical violence. In contrast, male attachment was not predictive of male-perpetrated violence. These findings suggest for females, fear of abandonment and rejection may be a risk factor for becoming a victim of violence. Alternatively, exposure to violence may contribute to the development of attachment anxiety in females. Clinical implications include providing cognitive interventions to address female attachment anxiety