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Displaying 28976 - 29000 of 73697

Questioning the Linear Relationship Between Doorway Width and Achievable Flow Rate

January 1, 2009
Author(s)
Steve M. Gwynne, Jessica Kratchman, Erica D. Kuligowski, James A. Milke
This paper suggests that the currently assumed linear relationship between exit width and achievable flow is a simplification that may lead to an overly optimistic view of the achievable flow rates. Analyzed data is presented from several sources in order

Scatterfield Optical Imaging for sub-10 nm Dimensional Metrology

January 1, 2009
Author(s)
Richard M. Silver
Recent developments in optical microscopy promise to advance optical metrology and imaging to unprecedented levels through theoretical and experimental development of a new measurement technique called "scatterfield optical imaging". ". Current metrology

SIM Comparison of DC Resistance Standards at 1 {O}, 1 M{O}, and 1 G{O}

January 1, 2009
Author(s)
Dean G. Jarrett, Randolph E. Elmquist, Nien F. Zhang, Alejandra Tonina, M Porfiri, Janice Fernandes, H Schechter, Daniel Izquierdo, C Faverio, Daniel Slomovitz, Dave Inglis, Kai Wendler, Felipe Hernandez-Marquez, B Rodriguez
A set of regional comparisons of dc resistance standards at the nominal values of 1 {Ω}, 1 M {Ω}, and 1 G {Ω} has recently been completed in the Sistema Interamericano de Metrogia (SIM) region. The motivation, design, standards, and results of these

Stairwell Evacuation from Buildings: What We Know We Don't Know

January 1, 2009
Author(s)
Richard D. Peacock, Jason D. Averill, Erica D. Kuligowski
Occupant descent down stairwells during building evacuations is typically described by measurable engineering variables such as stairwell geometry, speed, density, and pre-evacuation delay. In turn, predictive models of building evacuation use these
Displaying 28976 - 29000 of 73697
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