Copyright (c) 2013 Northeastern University All rights reserved. http://iris.lib.neu.edu/censsis_soilbed_pres Recent documents in SoilBED Presentations en-us Sun, 27 Jan 2013 23:07:25 PST 3600 http://iris.lib.neu.edu/censsis_soilbed_pres/4 http://iris.lib.neu.edu/censsis_soilbed_pres/4 Wed, 16 Dec 2009 13:12:00 PST The objective of the program is to design and build a system (Hardware and Software) to characterize physical soil properties including soil strength, moisture content, and classification to a depth of 36 inches. These measurements will be used for the following applications: 1) Selecting optimal locations for vehicle crossings over soil surfaced-terrain obstacles, 2) Prediction of soil deformation under vehicular traffic, 3) Site selection for contingency infrastructure facilities.

... ]]> E. Corey Soil biodiversity--Measurement http://iris.lib.neu.edu/censsis_soilbed_pres/2 http://iris.lib.neu.edu/censsis_soilbed_pres/2 Wed, 16 Dec 2009 13:11:59 PST This poster is to present an experimental procedure & associated results providing insight into the directivity of a 2 GHz air-coupled GPR antenna donated by Geophysical Survey Systems, Inc. The data collected from the experiment is analyzed and implemented into a 2D FDTD code for simulation of the antenna. The output from the FDTD model with improved excitation is compared to data collected in the field using the GPR antenna.

]]> Bryan Lavign Ground penetrating radar System failures (Engineering) http://iris.lib.neu.edu/censsis_soilbed_pres/3 http://iris.lib.neu.edu/censsis_soilbed_pres/3 Wed, 16 Dec 2009 13:11:59 PST Ground penetrating radar (GPR) for nondestructive testing is a relatively young technology, especially with application to civil infrastructure such as bridges and roadways. Conventional methods of processing and analyzing GPR data for civil infrastructure are often qualitative, using relative reflection amplitude from subsurface boundaries or reinforcing steel (rebars) as an indicator of health. This poster brings well understood electrical engineering analysis tools to the application of nondestructive testing of bridges using GPR. Using iterative forward modeling to improve upon conventional permittivity and depth calculations, a computational model geometry is computed for the assumed bridge deck with no anomalies present. A... ]]> Kimberly Belli Ground penetrating radar System failures (Engineering) http://iris.lib.neu.edu/censsis_soilbed_pres/1 http://iris.lib.neu.edu/censsis_soilbed_pres/1 Wed, 16 Dec 2009 13:11:58 PST An environmental issue that has reached interest in the academic and industry is groundwater contamination. Moreover, government agencies are concerned, for example, about the widespread of dense non-aqueous phase liquids (DNAPLs) in the underground due to incorrect disposal of this substance. Over the last five years we have done a great effort to enhance Cross Well Radar as a technology for detection of compounds which can be used to predict the mobility and persistence of chemicals in the unsaturated near surface. Image acquisition and processing has also been applied for contaminant detection and monitoring. In this poster, we describe a... ]]> Maria Fernanda Serrano G. Groundwater--Pollution Groundwater--Quality