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Twenty one of 118 irrigation water wells in the shallow (25-30 m thick) Mississippi River Valley alluvial aquifer in the Bayou Bartholomew watershed, southeastern Arkansas had arsenic (As) concentrations (<0.5 to 77 microg/L) exceeding 10 microg/L. Sediment and groundwater samples were collected and analyzed from the sites of the highest, median, and lowest(More)
Scaling data centers to handle task-parallel work-loads requires balancing the cost of hardware, operations, and power. Low-power, low-core-count servers reduce costs in one of these dimensions, but may require additional nodes to provide the required quality of service or increase costs by under-utilizing memory and other resources. We show that the(More)
Ubiquitous computing environments are characterized by an unbounded amount of noise and crosstalk. In these environments, traditional methods of sound capture are insufficient, and array microphones are needed in order to obtain a clean recording of desired speech. In this work, we have designed, implemented, and tested LOUD, a novel 1020-node microphone(More)
Recording speech and other sound is difficult in environments with a large amount of noise and/or crosstalk. In these environments, array microphones are needed in order to obtain a clean recording of desired speech. In this work, we have designed, implemented, and tested LOUD, a 1020-node microphone array. To the best of our knowledge and as documented by(More)
The potential health impact of As in drinking water supply systems in the Mississippi River Valley alluvial aquifer in the state of Arkansas, USA is significant. In this context it is important to understand the occurrence , distribution and mobilization of As in the Mississippi River Valley alluvial aquifer. Application of surface complexation models(More)
As the demand for live video communication increases, the devices available to the users need to be made faster, smaller, lower power, and easily modifiable. This project demonstrates an example video over IP application using a Compaq IPaq along with a field programmable gate array used for data processing. The video data is passed directly from the camera(More)
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