Stephans, Richard

Stephans, Richard A., System Safety for the 2P Century The Updated and Revised Edition of System Safety 2000, John Wiley Sons, Inc., New Yoik, 2004. 

Stephans, Richard A. System Safety for the 2Ist Century. New York Wiley, 2004. Walton, Mary. The Deming Management Method. New York Putnam, 1986. 

Submitted by Martin Kollmar, Richard Parlitz, Stephan R. Oevers, and Gunter Helmchen. ... 

Catherine Berho, Nathalie Guigues, Anne Togola, Stephane Roy, Anne-Marie Fouillac, Ian Allan, Graham A. Mills, Richard Greenwood, Benoit Roig, Charlotte Valat and Nirit Ulitzur... 

Bones and teeth dissolve in acid. The insoluble calcium monophosphate salt, from which hydroxyapatite is made, is converted to the more soluble calcium dihydrogen phosphate salt in an environment whose pH is less than 6.2 (Sect. 9.1.1). The severity of caries was related to the pH produced in dental biofilms (plaques) after ingesting sucrose and other sugars by Richard M Stephan. The pH response he identified is referred to as Stephan Curve. He found that the starting pH, the extent of its drop, and the time for recovery to the starting pH were all related to caries severity. The pH drop was later associated with lactic acid production due to bacterial carbohydrate fermentation (saccharolytic fermentation, Sect. 1.3.2). The subsequent rise in pH was due to the production of ammonia by bacterial... 

Stephan, J. (1997). Regeneration thermique des sables de fonderie - caracterisation d une installation Richards PX800", Fonderie Fondeurs d Auiourd hui. 170, pp. 21-53. 

System Safety Analysis Handbook, a Sourcebook for Safety Practitioners by Richard Stephan and Warner W. Talso... 

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