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Browsing 02 Physical Sciences by Title

Now showing items 293-312 of 622

Indentation-induced damage in GaN epilayers

Bradby, J.; Kucheyev, S. O.; Williams, J. S.; Wong-Leung, J.; Swain, M. V.; Munroe, P.; Li, G., Phillips, M. R. (American Institute of Physics, 2002)

The mechanical deformation of wurtzite GaN epilayers grown on sapphire substrates is studied by spherical indentation, cross-sectional transmission electron microscopy (XTEM), and scanning cathodoluminescence (CL) ...
Inelastic neutron scattering studies of TbNiALH(1.4) and UNiAlH2.0 hydrides

Kolomiets Alexandre; Bordallo Heloisa; Kalceff Walter; Kolesnikov Alexander; Nakotte Heinz; Eckert Juergen (Institute of Physics Publishing, 2003)

The optical vibrations of hydrogen in TbNiAlH1.4 and UNiAlH2.0 were investigated by means of inelastic neutron scattering. The experimental data were analysed, including multiphonon neutron scattering contributions, calculated ...
Influence Of External Traveling-Wave Magnetic Field On Trapped Field Of A High Temperature Superconducting Bulk Magnet Used In A Linear Synchronous Motor

Jin Jesse Sheng; Zheng Lihong; Xu Wei; Guo Youguang; Zhu Jianguo (Amer Inst Physics, 2011)

A single-sided high temperature superconducting (HTS) linear synchronous motor (HTSLSM) has been developed with a pulse magnetization system to obtain the HTS bulk magnet array with alternating magnetic poles for the motor ...
Influence of low-energy electron beam irradiation on defects in activated Mg-doped GaN

Klein Hn; Phillips Matthew; Gelhausen Olaf; Goldys Ewa (American Institute of Physics, 2002)

The effect of low-energy electron beam irradiation (LEEBI) on residual hydrogen impurities and native defects in activated metalorganic vapor phase epitaxy-grown Mg-doped (p-type) GaN layers was studied by cathodoluminescence ...
Inorganic positive uniaxial films fabricated by serial bideposition

Hodgkinson Ian; Wu Qi; De Silva Lakshman; Arnold Matthew (Optical Society of America, 2004)

The physical vapor deposition process of serial bideposition is adapted to the fabrication of uniaxial optical coatings. During the coating process the vapor impinges at an angle of incidence of about 70 on to the substrate, ...
In situ organization of gold nanorods on mixed selfassembledmonolayer substrates

Zareie Hadi; Xu Xiaoda; Cortie Michael (WileyV C H Verlag Gmbh, 2007)
In situ reversible electrochemical switching of the molecular first hyperpolarizability

Clays, K., Persoons, A.; McCleverty, J. A.; Ward, M. D.; Asselberghs, I.; McDonagh, A. M. (Elsevier Limited, 2003)

In situ reversible electrochemical switching of the molecular second-order nonlinear optical (NLO) polarizability, or first hyperpolarizability, has been implemented in a specially designed cell. The redox-switchable NLO ...
In situ synthesis of Co(3)O(4)/graphene nanocomposite material for lithium-ion batteries and supercapacitors with high capacity and supercapacitance

Wang Bei; Wang Ying; Park Jinsoo; Ahn Hyojun; Wang Guoxiu (Elsevier Science, 2011)

Abstract: Co(3)O(4)/graphene nanocomposite material was prepared by an in situ solution-based method under reflux conditions. In this reaction progress, Co(2+) salts were converted to Co(3)O(4) nanoparticles which were ...
Integrating affinity propagation clustering method with linear discriminant analysis for face recognition

Yang Jie; Wu Qiang; Du C; Li Feng (SPIE - International Society for Optical Engineering, 2007)

The Fisherface method suffers from the problem of using all training face images to recognize a test face image. To tackle this problem, we propose combining a novel clustering method, affinity propagation (AP), ...
The integration of forward light transport and lateral illumination of polymer optical fibre

Joseph, E. K; Franklin, J.; Smith, G. B; Deller, C. A (Causal Productions Pty Ltd, 2002)

Flexible polymer light guides doped with special micro-spheres to combine light leakage and long distance transport are described optically using a simple light distribution model. A constant angular profile of light ...
An Intelligent Controller for PEM Fuel Cell Power System Based on Double Closed-loop Control

Zhan Yuedong; Zhu Jianguo; Guo Youguang; Rodrigue Alexander (University of Tasmania, 2005)

This paper presents a double closed-loop controller for a proton exchange membrane fuel cell (PEMFC) power system. which consists of a PEMFC stack, a controller, an AC-DC and DC-AC converter with the function ...
Interface development in sintering of roll bonded metal laminates

Bakar Michelle; Wuhrer Richard; Yeung Wing (Trans Tech Publications Ltd, 2006)

Metal laminates have experienced rapid development in many engineering applications and generally possess enhanced properties with improved service performance. Roll bonding is a major technique used in manufacture of ...
Interfacial mixing and internal structure of Pt-containing nanocomposites grown by room temperature electron beam induced deposition

Li J T; Toth Milos; Dunn K A; Thiel Bradley (Amer Inst Physics, 2010)

Material grown by room temperature electron beam induced deposition (EBID) using (CH(3))(3)CH(3)C(5)H(4)Pt precursor consists of platinum nanocrystals embedded in an amorphous matrix. The crystallites are shown to intermix ...
Inverse iteration for nonlinear eigenvalue problems in electromagnetic scattering

Spence Alistair; Poulton Christopher (Kluwer, 2003)
Investigation of the interfacial structure of ultra-thin platinum film deposited by cathodic-arc

Swift Paul; Solina Danica; Cheary Robert; Mccredie Geoffrey (Elsevier Sequoia, 2003)

Ultra-thin films are of interest in the production of X-ray mirrors that use a multilayer structure. The most commonly used deposition techniques are de magnetron sputtering and electron beam evaporation; this paper ...
Ionic conductivity and electrochemical stability of poly(methylmethacrylate)-poly(ethylene oxide) blend-ceramic fillers composites

Shanmukaraj D.; Wang Guoxiu; Murugan R.; Liu Hua-Kun (Pergamon, 2008)

The role of inorganic ceramic fillers namely nanosized Al2O3 (15¿25 nm) and TiO2 (10¿14 nm) and ferroelectric filler SrBi4Ti4O15 (SBT CIT) (0.5 ?m) synthesized by citrate gel technique (CIT) on the ionic conductivity and ...
Josephsonvortex flow resistance in Bi2Sr2Ca2Cu3Oy single crystals and its possible application in the manipulation of spin and charge textures in diluted magnetic semiconductors

Liang B; Yu Shengyang; Ooi S; Hirata K; Ding S; Shi Dongyang; Dou Shi; Wang Xiu-Hong; Lin Zhi Wei (Jack); Lin Cc; Zhu Jianguo (American Institute of Physics, 2007)

In this work, the flow of the Josephson vortices (JVs) has been studied for the highly anisotropic Bi2Sr2Ca2Cu3Oy (Bi2223) single crystals. A giant flow of JVs or giant positive magnetoresistance (MR) of over 500%–2000% ...
Kinetics of gas mediated electron beam induced etching

Steven Randolph; Toth Milos; Cullen Jared; Chandler Olive; Lobo Charlene (American Institute of Physics, 2011)

Electron beam induced etching (EBIE) is a high resolution, direct write, chemical dry etch process in which surface-adsorbed precursor molecules are activated by an electron beam. We show that nanoscale EBIE is rate limited ...
Large positive magnetoresistance effect below Curie temperature in In1.90xMn0.1SnxO3

Wang Xiu-Hong; Peleckis G; Dou Shi; Liu Rongmei; Zhu Jianguo (American Institute of Physics, 2007)

We report on the magnetoresistance (MR) and magnetic properties of In1.90−xMn0.1SnxO3 (0<x <0.06) oxide. All samples were found to be ferromagnetic below TC=46 K. Sn doping changed In1.90Mn0.1O3 from an insulator to a ...
Lateral dynamic interaction analysis of a train-girder-pier system

Xia Hx; Guo Wenshan; Wu Xindong; Pi Yong Lin; Bradford Mark (Academic Press Ltd Elsevier Science Ltd, 2008)

A dynamic model of a coupled train-girder-pier system is developed in this paper. Each vehicle in a train is modeled with 27 degrees-of-freedom for a 4-axle passenger coach or freight car, and 31 for a 6-axle locomotive. ...

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