Sökresultat

In order to reduce the monostatic signature of the junction between a radome and the metallic structure to which it is attached, a tapered resistive sheet can be used. In this paper, we describe an easy method to realize this tapering using geometric variations on a subwavelength scale, with a significant reduction of the number of processing steps as a result.

Experiments where gasoline exhaust was exposed to UV-radiation to examine Secondary Organic Aerosol (SOA) formation were performed in a smog chamber. The Aerosol Mass Yield (formed SOA/reacted precursor mass) was determined and compared with the yield from a pure precursor experiment in the chamber and from results reported in literature. Preliminary results show that the majority of the organic a

Rice is one of the important staple foods for half of the world population particularly Asian countries for their livelihood, socio-economic and nutrition. Global warming is predicted to increase frequency of precipitation/rainfall, intensity of drought and solar-radiation/UV-B radiation which might affect the intensity and severity of rice pests in one hand, but also change in other friendly arth

A symposium held at Yarmouk University (YU), Jordan under the patronage of H.R.H. Prince Al-Hassan Bin Talal and in cooperation with Center for ME Studies at Lund University and Refugees, Displaced Persons, and Forced Migration Studies Center at YU. Speakers: Henry Diab - Leif Stenberg - Torsten Janson - Darcy Thompson - Khalid Al-Dabbas - Andrew Harber - Khalid Al-Wazani -

The paper summarizes experiences of development and use of interactive software for computer aided design of control systems. Different principles for interaction with users having wide ranges of experiences and knowledge are discussed. A comprehensive set of packages for modeling, identification, analysis, simulation, and design are described. Problems associated with structuring, portability, ma

This paper examines the development of the role of a certain group of semi-officials, known as tongshi in Chinese, in Sino-Tibetan relations from the late-fourteenth century to the end of the eighteenth century, i.e. during the Ming and Qing dynasties, with particular reference to the part played by tongshi in events along the pre-modern Sino-Tibetan border. Tongshi were often Tibetans in Chinese

This thesis is based on a number of experiments performed at the FRagment Separator (FRS) at the Gesellschaft für Schwerionenforschung mbH (GSI) in Darmstadt, Germany, in which heavy-ion reactions at relativistic energies have been used to produce nuclei far from stability. In April 1999 projectile fragmentation of ²⁰⁸Pb at 1 GeV/nucleon was used to study so called K-isomers in the neu

A pilot study has been conducted to find out if and how the building process influences the indoor air or the perception of the indoor air. As the first part of this investigation, a media study of what are considered to be healthy and unhealthy buildings was performed. From this media study two buildings were chosen and their building processes were examined more closely. This was carried out as

Genetic and epigenetic factors may predispose women to polycystic ovary syndrome (PCOS), a common heritable disorder of unclear etiology. Here we investigated differences in genome-wide gene expression and DNA methylation in adipose tissue from 64 women with PCOS and 30 controls. In total, 1720 unique genes were differentially expressed (Q < 0.05). Six out of twenty selected genes with largest exp

The dioxygen we breathe is formed by light-induced oxidation of water in photosystem II. O2 formation takes place at a catalytic manganese cluster within milliseconds after the photosystem II reaction centre is excited by three single-turnover flashes. Here we present combined X-ray emission spectra and diffraction data of 2-flash (2F) and 3-flash (3F) photosystem II samples, and of a transient 3F

A pCb plasmid encoding a beta-lactamase from Haemophilus ducreyi was transferred to Escherichia coli, purified, and characterized. The beta-lactamase could be isolated from a culture filtrate and further purified by ammonium sulfate and chelating Sepharose fast flow loaded with Zn(2+). The purified enzyme resulted in a major band at approximately 30-kDa on SDS-PAGE and its pI was determined to be

The purpose of this work is the investigation of some constitutive and configurational aspects of phenomenological model formulations for a class of materials with history-dependent gradient microstructure. The assumption that the behavior of a material point is affected by history-dependent processes in a finite neighbor of this point yields an extended continuum characterized by non-simple mater