Revised Japanese Industrial Standard on Tungsten Halogen Lamps(JIS C 7527-1984)

Light intensity decay in quartz-tungsten-halogen polymerization units.

OBJECTIVES The aim of this study was to determine the effect of ageing on the light intensity of quartz-tungsten-halogen (QTH) polymerization units in dental schools and dental clinics. MATERIALS & METHODS Two dental schools and multiple public health dental clinics were visited and the light intensity of curing units was assessed. The age, make, model and service history were recorded. A cal...

Irradiance of Horizontal Quartz-Halogen Standard Lamps

Spectral irradiance calibrations often require that irradiance standard lamps be oriented differently than the normal calibration orientation used at the National Institute of Standards and Technology and at other standards laboratories. For example, in solar measurements the instruments are generally upward viewing, requiring horizontal working standards for minimization of irradiance calibrat...

Revised PMLs and PSEEs for Industrial SPI

In the last decade, there has been much interest in software process improvement (SPI) [PWCC95]. Such improvement is supposed to lead to better product quality, better productivity, lower time-to-market, better predictability, etc. etc. Many Process-Centered Software Engineering Environments (PSEEs) have been designed and prototyped by researchers [FKN94]. A few of these have become commerciall...

Impact of Generic Fluid Milk and Cheese Advertising on Dairy Markets 1984-98 (Revised) by

New, revised hazard communication standard taking effect.

Dec. 1, 2013 was the fi rst compliance date of the federal Occupational Safety and Health Administration’s new, revised Hazard Communication Standard. Yes, you still have time to comply, and here is what you need to know. Why is the OSHA Hazard Communication Standard being revised? Part of the purpose for the update is to align with the United Nations’ Globally Harmonized System of Classifi cat...