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Passive energy dissipation devices are used to reduce the damage from earthquakes by absorbing a portion of the earthquake-induced energy in structures. Wide acceptance of these devices in structures will depend on the availability of simplified methods
The effects of relative humidity ranging from [approximately equal to] 0 % to 90 % on the moisture-enhanced photolysis (MEP) of a partially-methylated melamine acrylic polymer coating exposed to the ultraviolet (UV)/50 degrees C condition have been
Joannie W. Chin, K Aouadi, M R. Haight, W Hughes, Tinh Nguyen
One of the obstacles hindering the acceptance of polymer composites in civil engineering applications is the susceptibility of the polymeric matrix to degradation that is initiated by moisture, temperature, and corrosive chemical environments. The
The solar photovoltaic (PV) industry continues to make progress in increasing the efficiency while reducing the manufacturing costs of PV cells. Economies of scale are being realized as manufacturers expand their production capabilities. Products are
In 1993, a working group aimed at developing standards for design life was established in ISO Technical Committee TC59, Building Construction. The working group was later elevated to subcommittee status as ISO/TC59/SC14 - Design Life. The purpose of the
An outline of NIST research in the area of structural performance of housing systems is presented in this paper. The performance of wood-frame houses in past earthquakes and hur-ricanes is summarized, and the state-of-the-art in experimental and analytical
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
In this work we presented the first experimental measurements of influence of manganese- and tin-containing compounds (MMT, TMT0 on burning velocity of methane/air flames. We have also developed kinetic models describing the inhibition mechanisms
William L. Grosshandler, Anthony P. Hamins, Kevin B. McGrattan, Cary Presser
A laboratory-scale facility has been developed to screen the suppression effectiveness of fire fighting agents that are delivered in a transient fashion such as solid propellant gas generators. The transient application, recirculating pool fire (TARPF)
Walter J. Rossiter Jr, M Vangel, M E. McKnight, A Signor, Walter E. Byrd
A laboratory study was conducted to evaluate the reliability of commercial, field-portable ultrasonic extraction-anodic stripping voltammetry (UE/ASV) for determining the lead levels of laboratory-prepared paint films when tests were performed by certified
This publication contains the proceedings of the 32nd Joint Meeting of the U.S.-Japan Joint Panel on Wind and Seismic Effects. The meeting was held May 16-19, 2000, at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland (USA
Richard G. Gann, Jason D. Averill, Kathryn M. Butler, Walter W. Jones, George W. Mulholland, J L. Neviaser, Thomas J. Ohlemiller, Richard D. Peacock, Paul A. Reneke, J R. Hall
G Papadopoulos, Rodney A. Bryant, William M. Pitts
Phase-resolved measurements of the velocity field in acoustically forced, flickering laminar co-flowing methane/air diffusion flames have been made. Identical flames have been studied extensively in the past in order to characterize the effects of the
Laser light scattering and thermophoretic sampling have been used to investigate particle formation in a methane-air counterflow diffusion flames inhibited by iron pentacarbonyl (Fe(CO)5) added to the fuel or the oxidizer stream. Flame calculations which
The extinguishment of diffusion flames on two types of burners-an opposed-flow Tsuji burner and an axisymmetric burner with a surrounding coflow-by thermal agents has been investigated. Thermal agents are those that act primarily by extracting heat and
Mark R. VanLandingham, Christopher C. White, Xiaohong Gu, Tinh Nguyen
Durability, in terms of service life, is often related to the failure due to service conditions of an unacceptable percentage of a product population. In many cases, this percentage is much less than 1 %, and thus the factors affecting early times-to
Roger V. Bostelman, James S. Albus, William C. Stone
Construction equipment is typically massive and operated manually with minimal use of sensors or computers for measurement or control. Research in the Intelligent Systems and Structures Divisions at the National Institute of Standards and Technology has
Multizone modeling refers to annalysis techniques that use a simplified, zonal representation of a building to study building airflows, pressure differences, and contaminant transport. Each zone is assumed to have uniform temperature, pressure, and
In concretes with water-to-cement (w/c) ratios below about 0.38, a portion of the cement particles will always remain unhydrated due to space limitations within the material. Thus, in many of the high-performance concretes currently being produced, cement
This paper is a condensed version of G2001-1853, Peak Non-Gaussian Wind Effects for Database-Assisted Low-Rise Building Design, for publication in the Journal of Engineering Mechanics.Original paper abstract was:Procedures for estimating the peaks of the
Basic equilibrium properties of Lattice Boltzmann (LB) fluid mixtures (coexistence curve, surface tension, interfacial profile, correlation length) are calculated to characterize the critical phenomena occurring in these model liquids and to establish a
Results of part of an ongoing research program, being conducted at the National Institute of Standards and Technology (NIST) to study effects of elevated temperature exposure on performance of high performance concrete (HPC), are presented. One of the
Anthony D. Putorti Jr., Jay A. McElroy, Daniel M. Madrzykowski
Discussions with fire investigators indicate that it would be beneficial to have the ability to predict the quantity of liquid fuel necessary to create a burn pattern of a given size. Full-scale spill and fire experiments were conducted with gasoline and
The Department of Defenses Next Generation Fire Suppression Technology Program (NGP) has completed its fourth year of research with a revised goal to develop and demonstrate, by 2005, technology for economically feasible, environmentally acceptable and
Geraldine S. Cheok, William C. Stone, Robert R. Lipman, Christoph J. Witzgall, Javier Bernal
This paper summarizes work at the National Institute of Standards and Technology (NIST) in the Non-Intrusive Scanning Technologies for Construction Assessment Project. It will briefly describe the initial proof-of-concept phase of this project, the
This report describes results of NIST's experimental program that focuses on effects of elevated temperature exposure on mechanical properties of hing strength concrete (HSC). Mechanical properties were measured by heating, with and without preload, the