The spontaneous electrification of marble samples was studied while they were subjected to uniaxial stress. The Pressure Stimulated Current (PSC) technique was applied to measure the charge releasedâ€¦ (More)

Coal refuse impoundments constructed in the steep valleys of the Appalachian coal producing states of the Eastern USA can be easily and economically used to confine large volumes of slurry material.â€¦ (More)

The algorithms for the mathematical modeling to predict productivity of underground roomand-pillar mining systems are well known and documented. These algorithms consider the time-varyingâ€¦ (More)

Marble beams were subjected to gradually increasing three-point bending from low loading levels up to levels that significant damage was observed. After each loading step the permittivity wasâ€¦ (More)