Investigating the intensity of atmospheric water deposition and its diurnal distribution is essential from the ecological perspective, especially regarding dry geographic regions. It is also important in the context of monitoring the amount of moisture present within building materials in order to protect them from excessive humidity. The objective of this study was to test a constructed sensor...

The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds to the emission of newly-produced CH4 at the beginning of the vegetation period. Further field a...

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 generation of electrical pulses with durations in the picosecond range is an important topic in modern electronics [1]-[3]. Ultrafast time-domain metrology represents one of the most significant application spaces for these sharp pulses [1][2], since their narrow width directly translates to high temporal resolution. Two outstanding application examples of sharp pulses in time-domain metrol...

Multi-channel Analysis of Surface Waves (MASW) is a seismic wave propagation method which involves the measurement of Rayleigh waves propagating along the surface of a medium. The method is non-intrusive, fast and practical and it has been successfully utilized for the in-situ evaluation of shear modulus and layer thicknesses of soils and, more recently, pavement systems. The method is also wid...

− Quality control of vegetable oils is becoming more stringent, and related laws are being enforced, especially for avoiding adulteration. As a result, there is a substantial need for methods of analysis that could provide real-time in-situ monitoring, especially for quality control purposes during production process. In this regard, the present paper investigates the possibility of monitoring ...

Based upon a framework of time-frequency analysis, a path towards systematic and comprehensive implementation of condition based maintenance (CBM), or maintenance only upon evidence of need, is outlined for both electrical and mechanical systems. Specifically, metrics are proposed for helicopter drivetrain systems and electrical cable. Using principles of time-frequency analysis, metrics for he...