The urgency of development and metrological research reference installations based on high-pressure vessels, which meet the requirements implementation traceability instruments for measuring gas volume flow rate, is considered. operation algorithm specified when transferring unit to meters under consideration studied. Based features PVTt-type standards, a list analysed uncertainties type A form...

Smoking Policies Tighten in Halls of Academe As the fall 2012 semester gets under way, at least 744 U.S. colleges and universities have made their campuses completely smoke free, indoors and out, and nearly threequarters of those have banned all forms of tobacco on campus. Ty Patterson, executive director of the National Center for Tobacco Policy, told the Christian Science Monitor that many co...

In this brief paper we present sufficient conditions for the existence of a single stable controller to stabilize a set of n SISO plants: P1, P2, ..., Pn (strong simultaneous stabilization). As is well known this is equivalent to the existence of a single controller, not necessarily stable, to stabilize n+1 plants (simultaneous stabilization). The basic assumption required in the current paper ...

The air-kerma standards used for the measurement of medium-energy x rays were compared at the National Institute of Standards and Technology (NIST) and at the Bureau International des Poids et Mesures (BIPM). The comparison involved a series of measurements at the BIPM and the NIST using the air-kerma standards and two NIST reference-class transfer ionization standards. Reference beam qualities...

Recently, indoor air quality has attracted the attention of policymakers and researchers as a critical issue like that of external air pollution. Indoor air quality is more important as people spend time longer indoors than outdoors. Indoor environments are closed compared to external environments providing less opportunity for the pollutants to dilute. The emissions contain many substances tha...