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Mark R. VanLandingham, John S. Villarrubia, William F. Guthrie, G F. Meyers
Indentation measurements made with atomic force microscopy (AFM) probes are relative measurements, largely due to the lack of information regarding the tip shape of the AFM probes. Also, current tip shape calibration procedures used in depth-sensing
A series of six full-scale subassemblages were tested to investigate dogbone and haunch retrofits for pre-Northridge steel moment connections. Tests included matched pairs of specimens, one bare steel and one including composite slab. Data were collected
Researchers at the National Institute of Standards and Technology's Building and Fire Research Laboratory are working with the U.S. Fire Administration; the bureau of Alcohol, Tobacco, and Firearms; and the U.S. Department of Justice to provide a more
The BEES (Building for Environmental and Economic Sustainability) version 2.0 software implements a rational, systematic technique for selecting environmentall and economically balanced building products. The technique is based on consensus standards and
Commercial transport aircraft cargo compartments require both fire detection and suppression capabilities in order to meet regulatory requirements. System reliability is very important since in many cases the cargo compartment is inaccessible during flight
Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham, M Giraud, R Dutruc-Rosset, R Ryntz, D Nguyen
The interphase between a polymer film and a substrate controls the adhesion and durability of a variety of polymeric systems including adhesives, coatings on plastics and metals, and electronic packaging. A polymeric coating system consists of a coating
This paper details a case study that utilized model simulations to assess the relative performance benefits of distributed sensing over single-station, single-sensor smoke detection and co-located multi-sensor detection. 500 individual CFAST computer fire
M Giraud, Tinh Nguyen, Xiaohong Gu, Mark R. VanLandingham
The effects of stoichiometry and epoxy molecular mass on surface and interfacial microstructures and wettability of amine-cured epoxies have been investigated. Thin (150 m) amine-cured epoxy films were prepared by reacting epoxy resins having sixdifferent
This paper details an experimental program that gathered photoelectric and ionization analog output smoke sensor, thermal sensor, and an electrochemical CO sensor output signals during exposure to various fire and non-fire stimuli reproduced in the fire
Thomas G. Cleary, Michelle K. Donnelly, George W. Mulholland, B Farouk
Modeling fire detector performance requires detailed information on the environment surrounding the detector, the species transport (heat, smoke, gas) from the surrounding to the sensing surface or volume, and the sensor response. The species transport to
Thomas G. Cleary, Michelle K. Donnelly, William L. Grosshandler
This paper describes the fire emulator/detector evaluator which was developed by NIST. The FE/DE has proven to be a very flexible design. The main function of the device is to reproduce the environment (temperature, air velocity, aerosol and gas species
The pressures of competing in the global marketplace are forcing building control companies, equipment and systems manufacturers, energy providers, utiliites, and design engineers to improve performance and reduce costs. One means of meeting this twin
Scanning probe microscopy (SPM) has been used to study polymeric materials with nanometer spatial resolution. Indentation methods based on SPM technology include the use of cantilever probes with an atomic force microscope (AFM), depth-sensing transducers
The standard test method for evaluating sealant performance is the ASTM C719, which resulted from the pioneering work of NIST researcher Authur Hockman. This test method is a threshold or torure test. This presentation will detail efforts to move away from
Modern building fire sensors are capable of supplying substantially more information to the fire service than just the simple detection of a possible fire. With the increase in the number of sensors installed in buildings for non-fire purposes, it is
Measurements of particles size distributions and optical properties of smoke detector test smokes may yield a better understanding of existing detector designs and facilitate design improvements; NIST is making such measurements now on smokes produced in
Rheological tests on cement paste were used to successfully select the type and dosage of mineral admixtures that improved concrete workability. Among the six different mineral admixtures tested, the ultra fine fly ash (UFFA), was determined to give the
Richard D. Peacock, Richard W. Bukowski, Paul A. Reneke, Jason D. Averill, S. H. Markos
U.S. passenger train fire safety has historically been addressed primarily through the citation of small-scale flammability and smoke emission tests and performance criteria promulgated by the Federal Railroad Administration (FRA). This approach has
Jeffrey W. Gilman, Takashi Kashiwagi, A B. Morgan, Richard H. Harris Jr., L D. Brassell, W H. Awad, Rick D. Davis, L Chyall, T E. Sutto, Paul C. Trulove, H DeLong
A new approach to address the ever increasing demand for higher performance flame retarded products has recently focused on use of mica-type clays nano-dispersed in commodity polymers. These "nanocomposites" exhibit the unusual combination of reduced
It is generally recognized that the vast majority of deaths associated with accidental enclosure fires are due to smoke inhalation. Older reviews of autopsy results suggested that the fraction was on the order of 2/3. In the United States there is evidence
Stephen Fallis, Russell Reed, Jennifer L. McCormick, Kim Wilson, Gary Holland
The Advanced Propellant/Additive Development for Gas Generators project is a collaborative effort between General Dynamics OTS-Aerospace (GD) in Redmond, WA and the Naval Air Warfare Center-Weapons Division (NAWCWD) in China Lake, CA. The project
This study considers the situation of two isothermal rooms linked to one another via an opening of varying size. Air and a neutrally buoyant contaminant are transferred through the opening in an essentially one way flow situation, driven by forced
This paper presents an expert rule set for air-handling units (AHUs) and examines the performance of the rule set using simulation and field data. APAR (air-handling unit performance assessment rules), the software implementation of the rule set, is first
Jiann C. Yang, Michelle K. Donnelly, N C. Prive, William L. Grosshandler
This paper is an abridged version of NISTIR 6319. The design, construction, demonstration, and operation of a bench-scale device capable of screening the fire suppression efficiency of liquid agents are described in detail in this report. The apparatus is
Xiaohong Gu, D T. Raghavan, Tinh Nguyen, Mark R. VanLandingham, D Yebassa
One of the major disadvantages of polyester materials is their sensitivity to hydrolysis. In this paper, tapping mode atomic force microscopy (AFM) has been used to examine the microstructure of polyester films before and after exposure to an alkaline