نتایج جستجو برای: domain reflectometry

تعداد نتایج: 407136  

2015
Meisong Wang Rajiv Ranjan Prem Prakash Jayaraman Peter E. Strazdins Pete Burnap Omer F. Rana Dimitrios Georgakopoulos

Big Data is revolutionizing nearly every aspect of our lives ranging from enterprises to consumers, from science to government. On the other hand, cloud computing recently has emerged as the platform that can provide an effective and economical infrastructure for collection and analysis of big data produced by applications such as topic detection and tracking (TDT). The fundamental challenge is...

2015
Joseph Dahlen Finto Antony Anzhi Li Kim Love-Myers Laurence Schimleck Erik B. Schilling

Time-domain reflectometry (TDR) can be used to predict the moisture content in porous materials, including soil, and is an exciting tool that could be used to measure the moisture content in wet-stored wood. Three-rod probes with 127 mmor 152 mm-long rods were inserted into 62 loblolly pine and 34 sweetgum saturated bolts. The bolts were air dried over a span of five weeks. TDR waveforms and mo...

2015
Anna Nakonieczna Marcin Kafarski Andrzej Wilczek Agnieszka Szyplowska Grzegorz Janik Malgorzata Albert Wojciech Skierucha

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...

2003
D. Wagner C. Wille E.-M. Pfeiffer Alfred Wegener

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...

2006
David S. Ricketts Donhee Ham

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...

2009
A. Cataldo E. Piuzzi G. Cannazza E. De Benedetto L. Tarricone

− 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 ...

1998
J. A. Yeakley W. T. Swank L. W. Swift

Soil moisture gradients along hillslopes in humid watersheds, although indicated by vegetation gradients and by studies using models, have been difficult to confirm empirically. While soil properties and topographic features are the two general physiographic factors controlling soil moisture on hillslopes, studies have shown conflicting results regarding which factor is more important. The rela...

2010
Giovanna Calò Francesco Lattarulo Vincenzo Petruzzelli

A GTEM cell, suitable for assessing possible biological effects induced on cell samples by electromagnetic fields at the typical frequencies of GSM mobile phones, has been designed and set up. Basic environmental requirements for in-vitro biological experiments, involving a GTEM cell, have been assessed by controlling the electromagnetic field distribution and survival conditions. The GTEM cell...

2010
Kyle W. Blasch Ty P. A. Ferré Jasper A. Vrugt

7 Abstract Streambed drainage was measured at the 8 cessation of 26 ephemeral streamflow events in Rillito 9 Creek, Tucson, Arizona from August 2000 to June 2002 10 using buried time domain reflectometry (TDR) probes. An 11 unusual drainage response was identified, which was char12 acterized by sharp drainage from saturation to near field 13 capacity at each depth with an increased delay betwee...

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