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

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

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 arsenide Quarterly progress report, 1 Oct. - 31 Dec. 1969

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

Development of a noise annoyance sensitivity scale

Examining the problem of noise pollution from the psychological rather than the engineering view, a test of human sensitivity to noise was developed against the criterion of noise annoyance. Test development evolved from a previous study in which biographical, attitudinal, and personality data was collected on a sample of 166 subjects drawn from the adult community of Raleigh. Analysis revealed that only a small subset of the data collected was predictive of noise annoyance. Item analysis yielded 74 predictive items that composed the preliminary noise sensitivity test. This was administered to a sample of 80 adults who later rate the annoyance value of six sounds (equated in terms of peak sound pressure level) presented in a simulated home, living-room environment. A predictive model involving 20 test items was developed using multiple regression techniques, and an item weighting scheme was evaluated

Propellant slosh coupling with bending Interim report

Vibrational characteristics of large liquid propellant space vehicl

Transition metal impurities in semiconductors

Crystal field theory applied transition metal impurities in semiconductor

A multi-wavelength view of galaxy evolution with AKARI

AKARI's all-sky survey resolves the far-infrared emission in many thousands of nearby galaxies, providing essential local benchmarks against which the evolution of high-redshift populations can be measured. This review presents some recent results in the resolved galaxy populations, covering some well-known nearby targets, as well as samples from major legacy surveys such as the Herschel Reference Survey and the JCMT Nearby Galaxies Survey. This review also discusses the prospects for higher redshifts surveys, including strong gravitational lens clusters and the AKARI NEP field.Comment: Accepted for Publications of the Korean Astronomical Society (September 30, 2012 issue, volume 27, No. 3), Proceedings of the Second AKARI conference, Legacy of AKARI: A Panoramic View of the Dusty Universe. 6 page

Ultrasonic Backscatter Rotation Scanner for Detection of Ply Bends and Fiber Wrinkles

Fiber wrinkles and ply bends in structures composed of laminated, fiber reinforced plastic materials are known to degrade performance under design load conditions. Such flaws can inadvertently be manufactured into structures, such as solid rocket motor (srm) cases and nozzles, and generally are difficult to detect. For structures such as nozzles, plies are not coplanar with the nozzle wall, but have an out-of-plane direction. Such materials offer an increased challenge for detection of ply bends and fiber wrinkles. Advanced nondestructive evaluation (NDE) methods are needed for detection of these flaws so that manufacturing processes can be characterized and improved and, also, to prevent the usage of defective materials. Ultrasonic backscatter-based methods have been demonstrated to be sensitive to fiber direction and to transverse cracks in composite laminate plates and test panels with plies lying in the plane of the plate or panel [1–5]. Backscatter methods, thus, provide a viable foundation for addressing the similar problem of ply bends and fiber wrinkles in composites with out-of-plane plies. This paper describes an improved ultrasonic backscatter method for detection of ply distortions in structures with out-of-plane ply orientations