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Displaying 176 - 200 of 3882

Simmering Sauces! Elevated Formaldehyde Concentrations from Gas Stove Burners

July 22, 2018
Author(s)
Dustin G. Poppendieck, Mengyan Gong
Formaldehyde is listed as a human carcinogen, and can be formed as a primary by-product during combustion processes. Past studies have not detected elevated formaldehyde concentrations from gas stoves, perhaps due to the time averaging nature of previous

Quantifying Wind-Driven Firebrand Production from Roofing Assembly Combustion

July 16, 2018
Author(s)
Samuel Manzello, Sayaka Suzuki, Tomohiro Naruse
Large outdoor fires present a risk to the built environment. Examples often in the international media reports are wildfires that spread into communities, referred to as Wildland-Urban Interface (WUI) fires. Other examples are large urban fires including

User Instructions and Technical Details for 500 mm GHP Simulation Programs

July 13, 2018
Author(s)
William C. Thomas
This report is a supplement to the paper published as "Transient Thermal Response of an Extended Temperature Range 500-mm diameter Guarded Hot-plate Apparatus" by Thomas and Zarr (2018), hereafter referred to as the "paper." The paper emphasizes the use of

Performance Testing of Hydraulic Cements: Measuring Sulfate Resistance

May 25, 2018
Author(s)
Chiara C. Ferraris, Paul Stutzman, Max A. Peltz
The sulfate resistance of cements used in the construction industry is traditionally assessed by measuring the expansion of a prism of 280 mm (11inch) length and 25 mm (1 inch) square cross section immersed in a sodium sulfate solution for at least one

Ventilation, IAQ and Filtration in a Net Zero Energy House

May 24, 2018
Author(s)
Andrew K. Persily, Lisa C. Ng, Dustin G. Poppendieck, Steven J. Emmerich
The Net Zero Energy Residential Test Facility (NZERTF) was constructed at the National Institute of Standards and Technology (NIST) to support the development and adoption of cost-effective net zero energy designs and technologies. The 250 m2 two-story

Burning Velocities of Marginally Flammable Refrigerant-Air Mixtures

May 1, 2018
Author(s)
Gregory T. Linteris
Refrigerant working fluids have been predicted to be large contributors to the increase in radiative forcing of the earth. Consequently, existing compounds will soon be phased out. Low- GWP replacements exist, but they tend to be mildly flammable, and

Balancing Energy and IAQ: NIST Net-Zero Energy Residential Test Facility

April 18, 2018
Author(s)
Lisa C. Ng, Dustin G. Poppendieck, William S. Dols, Brian P. Dougherty, Steven J. Emmerich
Buildings used 39 % of all energy used in the United States in 2017, with residential buildings and commercial buildings accounting for 20 % and 19% (EIA 2018) respectively. Zero energy buildings have the potential to help extend and accelerate the recent

The enigmatic vitrification at the ancient hillfort Broborg and its utilization as an analogue for nuclear waste glass.

January 1, 2018
Author(s)
Jamie L. Weaver, Rolf Sjoblom, Eva Hjarthner-Holdar, Carolyn Pearce, Erik Ogenhall, Mia Englund, John McCloy, David Peeler, Albert Kruger
Although the modern understanding of chemistry dates back only around 300 years, many of the processes and products used today were actually originally developed by ancient people. However, much of such ancient knowledge has been lost, as is the case for

Users Guide to HVAC-Cx v2.2

December 6, 2017
Author(s)
Michael A. Galler, Natascha S. Milesi-Ferretti
HVAC-Cx is a software tool designed to facilitate performance analysis for mechanical equipment buildings. It is used for ongoing monitoring and provides the ability to detect faults related to improper operation, using expert rules to present results of

Role of Materials Science in the Resilience of the Built Environment

December 5, 2017
Author(s)
Stephanie S. Watson, Chiara C. Ferraris, Jason D. Averill
The resilience of U.S. communities, defined as the "ability to withstand and recover rapidly from disruptive events," is directly dependent upon the ability of the built environment to maintain and support the functions upon which modern society has come

Analysis of Wind Pressure Data on Components and Cladding of Low-Rise Buildings

December 1, 2017
Author(s)
Dat Duthinh, Joseph A. Main, Matthew L. Gierson, Brian M. Phillips
This paper presents a methodology for analyzing wind pressure data on cladding and components of low-rise buildings. The aerodynamic force acting on a specified area is obtained by summing up pressure time series measured at that area’s pressure taps times

Estimating peaks of stationary random processes: a peaks-over-threshold approach

December 1, 2017
Author(s)
Dat Duthinh, Adam L. Pintar, Emil Simiu
Estimating properties of the distribution of the peak of a stationary process from a single finite realization is a problem that arises in a variety of science and engineering applications. Further, it is often the case that the realization is of length T

WIND LOAD FACTORS FOR USE IN THE WIND TUNNEL PROCEDURE

December 1, 2017
Author(s)
Emil Simiu, Adam L. Pintar, Dat Duthinh, DongHun Yeo
A 2005 Skidmore Owings and Merrill report notes that the ASCE 7 Standard is incomplete insofar as it provides no guidance on wind load factors appropriate for use with the Standard’s wind tunnel procedure. The purpose of this paper is to contribute to such
Displaying 176 - 200 of 3882
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