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Dechlorane plus (DP) was quantified by gas chromatography/mass spectrometry (GC/MS) in soil and ambient air (collected from Harbin City, a typical northeastern Chinese urban region), water and sediment samples (collected in the segment within Harbin of Songhua River, located in northeast of China). The average concentrations of DP in sediment and soil samples were 123.6pgg −1 dry weight (dw),...
Underground is a challenging environment for wireless communication since the propagation medium is no longer air but soil, rock and water. The well established wireless communication techniques using electromagnetic (EM) waves do not work well in this environment due to three problems: high path loss, dynamic channel condition and large antenna size. New techniques using magnetic induction (MI) can...
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