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Wave splitting and imbedding equations for a spherically symmetric dispersive medium

The direct problem of time dependent electromagnetic scattering in the dispersive sphere is solved by a wave splitting technique. The electric field is expanded in a series involving vector spherical harmonics, leading to a system of wave equations for each term. These systems are reduced to scalar wave equations for each term, which are solved via reflection operators. Some preliminary numerical

Hematopoietic stem cells: c-mpl and TNF receptor function

Hematopoietic stem cells (HSC) are crucial to life. Daily and throughout the life span of an individual they are responsible for replacing approximately 10(12) mature blood cells. Mature cells are, for example, required for transportation of oxygen, defense against infections and to stop bleeding. Thus, our aim with this study was to characterize these rare murine (Lin-Sca1+c-kit+) and human (CD34

Concurrent quantitative laser-induced incandescence and SMPS measurements of EGR effects on particulate emissions from a TDI Diesel engine

A comparison of scanning mobility particle sizer (SMPS) and laser-induced incandescence (LII) measurements of diesel particulate matter (PM) was performed. The results reveal the significance of the aggregate nature of diesel PM on interpretation of size and volume fraction measurements obtained with an SMPS, and the accuracy of primary particle size measurements by LII. Volume fraction calculatio

Tone restricts F0 range and variation in Kammu

The aim of this study is to investigate whether the occurrence of lexical tones in a language imposes restrictions on its pitch range. We use data from Kammu, a Mon-Khmer language spoken in Northern Laos, which has one dialect with, and one without, lexical tones. The main finding is that speakers of the tonal dialect have a narrower pitch range, and also a smaller variation in pitch range.