Jeffery L. Kohler

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Recent mine disasters in the U.S. exposed various inadequacies and gaps in mine-safety technology. Congress responded to these tragedies by enacting the Mine Improvement and New Emergency Response Act of 2006 (MINER Act), which resulted in the most significant change to mine-safety laws in 30 years. To help meet the requirements of the MINER Act and to help(More)
Condition-based maintenance (CBM) of industrial equipment is generally recognized as being the most cost-effective means for improving equipment availability. However, prerequisite to successful implementation of CBM is a reliable detector of failing components. One such detector, termed the effective negative-sequence impedance, had previously been(More)
The placement of mine-monitoring system sensors, or transducers, requires considerable planning and forethought so that the potential benefits of mine monitoring can be realized. The intended use of the monitored data will often dictate specific locations for sensors, although in many cases technical constraints, imposed by sensor or measured(More)
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