Efficient reconstruction of dispersive dielectric profiles using time domain reflectometry (TDR) P. Leidenberger, B. Oswald, and K. Roth Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany Received: 29 July 2005 – Accepted: 5 August 2005 – Published: 15 August 2005 Correspondence to: B. Oswald ([email protected]) © 2005 Author(s). This work is l...

The optical dispersive prism is a well-studied element, which allows separating white light into its constituent spectral colors, and stands in nature as water droplets. In analogy to this definition, the acoustic dispersive prism should be an acoustic device with capability of splitting a broadband acoustic wave into its constituent Fourier components. However, due to the acoustical nature of ...

Transmission line theory and a genetic algorithm are used herein for extracting per-unitlength parameters of microstrip or striplines with dispersive dielectric substrates. S-parameters of the line section are measured and used as an objective function for global optimization. The discrepancy between the modeled and measured results is minimized over all the frequency range of interest. Wave eq...

Dispersive soils are a common problematic soil that may pose engineering distress if not adequately taken care of. On the other hand, stabilization of with waste materials has recently gained more interest from an environmental and sustainable point view. Hence, this study utilized sulfur-free lignin (SFL), which is bioethanol-based by-product, to improve dispersive silt clay investigated effec...

Background: Green chemistry focuses on an efficient extraction strategy for pesticides from agricultural and environmental samples. QuEChERS (quick, easy, cheap, effective, rugged, and safe) method is used primarily, in the extraction of pesticides from food matrices. Certain modifications in the approach lead to better sensitivity and efficient extraction. This paper describes an analytical ap...

The possibility of automated multiple readings of water content and bulk soil electrical conductivity represents a major benefit in soil research, and is one of the most attractive characteristics of the time domain reflectometry (TDR) technique. Coaxial multiplexers are commonly employed to monitor up to hundreds of TDR probes through computer or datalogger interface.We observed that the diffe...

S. M. Boyetchko* and J. P. Tewari Department of Plant Science, University of Alberta, Edmonton, Alberta, Canada T 6 G 2 P 5 Z. Naturforsch. 48c , 923-929 (1993); received April 6,1993 Vesicular-Arbuscular Mycorrhizae, Taxonomy, Calcium, X-Ray Microanalysis Three VA mycorrhizal fungal species were isolated from soils in Alberta, Canada and ex­ amined by scanning electron microscopy and energy-di...