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Displaying 1876 - 1900 of 3892

Determining the Uncertainty of X-Ray Absorption Measurements

November 1, 2004
Author(s)
G S. Wojcik
X-ray absorption techniques have become more common and more accepted in the study of moisture contents and transport in building materials like cement pastes, mortars, and wood. To be able to properly interpret the data gathered by the machine, it is

Hurricane Damage Prediction Model for Residential Structures

November 1, 2004
Author(s)
Emil Simiu, J P. Pinelli, C Subramanian, L. Zhang, A Cope, K Gurley, James J. Filliben, S Hamid
This paper reports progress in the development of a practical probabilistic model for the estimation of expected annual damage induced by hurricane winds in residential structures. The estimation of the damage is accomplished in several steps. First, basic

R-22 Replacement Status

November 1, 2004
Author(s)
J M. Calm, Piotr A. Domanski
Since its initial recognition in 1928 and commercialization in 1936, R-22 has been applied in systems ranging from the smallest window air conditioners to the largest chillers and heat pumps, including those for district cooling and heating. Individual

Scanning Electron Microscopy Imaging of Hydraulic Cement Microstructure

November 1, 2004
Author(s)
Paul E. Stutzman
Microscopy of portland cement clinker and cementitous materials dates to the first petrographic microscope in the late 19th century. The development of the scanning electron microscope (SEM) with x-ray microanalysis allows the petrographer to study cements

Virtual Permeametry on Microtomographic Images

November 1, 2004
Author(s)
C H. Arns, M A. Knackstedt, W V. Pinczewski, Nicos Martys
We show that accurate numerical micropermeametry measurements can be performed on three dimensional digitized images of sedimentary rock. The sample size can be very small making it possible to predict properties from core material not suited for

Validation of the Receprocity Law for Coating Photodegradation

October 20, 2004
Author(s)
Joannie W. Chin, Tinh Nguyen, Jonathan W. Martin, E Byrd
Accelerating the photodegradation of commerical polymeric materials has great practical importance in the weathering community. However, questions exist as to whether high radiant flux exposure results cn be extrapolated to in-service exposure levels
Displaying 1876 - 1900 of 3892
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