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Transmission Electron Microscopy of Semiconductor Nanowires

Semiconductor nanowires are studied by using transmission electron microscopy (TEM) based methods in this work. In the first section, the growth mechanism of gallium arsenide nanowires grown by chemical beam epitaxy is investigated. The nanowires are epitaxially grown from a gallium arsenide substrate by using gold seed particles as catalysts. The growth of gold particle catalysed nanowires is oft

An interlaboratory study on measurements of clothing evaporative resistance with thermal manikins

Abstract in UndeterminedAn interlaboratory study on measurement of evaporative resistance (Ret) with thermal manikins has been conducted in order to assess the repeatability and reproducibility limits as a function of mean resistance values, when using similar test protocols (ASTM F2370). Three independent laboratories tested seven clothing ensembles, with Ret ranging from very low to very high va

Nuclear Structure and Exotic Decays; Doubly-Magic 56Ni and Semi-Magic 58Ni

The nuclear structure of two nuclei, 56Ni and 58Ni, has been studied using fusion-evaporation reaction experiments. The experiments were performed at the Lawrence Berkeley and Argonne National Laboratories in the U.S.A. The number of known spherical and deformed states in 56Ni has been significantly extended. One case of prompt proton emission from a well-deformed excited state into the ground st

A General Mode Matching Technique applied to Bandpass Radomes

A new method based on the mode matching technique and the finite element method (FEM) is presented. The method can handle a general thick frequency selective structure (FSS), that consists of an arbitraryn umber of aperture layers and dielectric layers. An aperture layer consists of a conducting plate with a periodic arrayof apertures. The order and the thickness of the layers can be arbitrary. The

Incorporation of environmental aspects in transport purchasing

In spite of the fact that transport is the fastest growing sector relevant to the environment and that there is an awareness in society of the environmental problems caused by transportation, there are still few methods addressing the problem. In this article research with a case study approach is presented. The research has resulted in a framework model consisting of two tools and a work process.

Continuous-Time Identification of SISO Systems using Laguerre Functions

This paper looks at the problem of estimating the coefficients of a continuous-time transfer function given samples of its input and output data. We first prove that any nth-order continuous-time transfer function can be written as a fraction of the form /spl Sigma//sub k=0//sup n/b~/sub k/L/sub k/(s)//spl Sigma//sub k=0//sup n/a~/sub k/L/sub k/(s), where L/sub k/(s) denotes the continuous-time La