Robert A Timko

Philosophies for Living

This interdisciplinary and intercultural anthology approaches some fundamental philosophical questions with a focus on the “self” — and its discovery, limitations, possibilities, and contexts. Numerous readings and a wide variety of voices include Africans, Natives, Hispanic Americans, religiou...

A short-term evaluation of compressible stoppings used in trona mines

Laboratory evaluation of spray-applied rigid urethane foams

Sulfur hexafluoride as a mine ventilation research tool : recent field applications

New techniques for reducing stopping leakage

Laboratory evaluation of the Du Pont P-2500 automatic flow-controlled personal dust sampling pump

Detection and Control of Spontaneous Heating in Coal Mine Pillars-A Case Study

This U.S. Bureau of Mines study examined spontaneous heating episodes in coal mine pillars in an active underground coal mine. The information obtained from these incidents was then analyzed to learn which sampling methods provided the earliest indication of pillar heating. The objective of this stu...

Nitrogen Dioxide Calibration Standards for Portable Monitors

Mine operators and Mine Safety and Health Administration inspectors use portable gas monitors in underground mines to measure worker exposure to various gases such as methane, carbon monoxide, and nitrogen dioxide (NO2). Even in relatively small concentrations, NO2 can produce harmful side effects i...