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Anthony P. Hamins, Matthew F. Bundy, C B. Oh, Stephen P. Fuss, J. Logue
This final report describes the study that has been supported through the National Aeronautics and Space Administration (NASA) microgravity grants program from February 2004 through March 2007. This work was a continuation of a NASA microgravity grant that
The paper evaluates performance of finned-tube evaporators at different refrigerant exit superheats to assess the impact of longitudinal heat conduction on capacity.
William D. Davis, David G. Holmberg, Paul A. Reneke, L D. Brassell, R Vettori
On September 22, 2005 the National Institute of Standards and Technology (NIST) conducted a demonstration of two prototype tactical decision aid computer interfaces in the city of Wilson, North Carolina. Members of the City of Wilson Fire Department
Aircraft fire suppression applications inherently demanding performance requirements, made all the more challenging by low temperature conditions, physical inaccessibility, and high and possibly uncertain air flow conditions, have been historically
The 2004 Construction Users Roundtable (CURT) report, Collaboration, Integrated Information, and the Project Life Cycle in Building Design, Construction and Operation (WP-1202), makes clear that there is a compelling need to improve project delivery
Smokeview is a software tool designed to visualize numerical calculations generated by fire models such as the Fire Dynamics Simulator (FDS), a computational fluid dynamics (CFD) model of fire-driven fluid flow or CFAST, a zone fire model. Smokeview
William D. Davis, R Vettori, Paul A. Reneke, L D. Brassell, David G. Holmberg, Jodi Kostecki, Jessica Kratchman
On July 26, 2005, the National Institute of Standards and Technology (NIST) conducted a workshop consisting of fire service and fire safety personnel that had two objectives. The first, was to give the attendees a presentation of the history and present
Nicos Martys, Chiara F. Ferraris, V Gupta, Josephine H. Cheung
Predicting the rheological properties of fresh concrete, mortars, and cement paste from first principles remains a great challenge. While progress has been made in modeling the rheological properties of idealized hard sphere-like suspensions, there is
As the potential of computer modeling of hydration and microstructure development of cement-based materials approaches realization, the development of virtual standard test methods becomes a viable possibility. In creating these virtual standards, just as
In the twenty-first century, most high-performance concretes, and many other ordinary concretes, are now based on blended cements that contain silica fume, slag, and/or fly ash additions. Because the chemical shrinkage accompanying the pozzolanic and
The United Nations Centre for Trade Facilitation and Electronic Business (UN/CEFACT) has as its primary objective the delivery of simple, transparent processes for international trade, thereby making the activities between the buyer, the seller and the
Motivated by recent efforts to mitigate blast loading using energy-absorbing materials, this paper investigates the mechanics of uniaxial crushing of cellular sandwich plates under air blast loading using analytical and computational modeling. This model
Database-assisted design (DAD) is a methodology of designing structures for wind loads that makes direct use of pressure time series from wind tunnel tests. This paper presents interpolation procedures that enable application of the DAD approach for cases
Matthew F. Bundy, Anthony P. Hamins, Erik L. Johnsson, Sung C. Kim, Gwon Ko, David B. Lenhert
A series of new reduced-scale compartment fire experiments were conducted, which included local measurements of temperature and species composition. The measurements are unique to the compartment fire literature. By design, the experiments provided a
Tinh Nguyen, Joannie W. Chin, E Byrd, David Alshed, Cyril Clerici, Jonathan W. Martin
Water at the polymer/substrate interface in coatings, adhesives, and fiber-reinforced polymer composites is often the main cause of adhesion loss in these systems. Using experimental data measured in this study, we critically assess the role of interfacial
Cements classification is based, in part, upon phase composition. Traditionally, estimates of composition have been made using bulk chemical analyses and the Bogue calculations that were developed over 75 years ago. Since their introduction, these
Stephen J. Treado, Alan B. Vinh, David G. Holmberg, Michael A. Galler
This paper describes a methodology for controlling access to building information to approved external entities such as police, fire and public safety officials. Building automation systems frequently monitor critical building information, including the
Closed-circuit breathing devices recycle exhaled air after scrubbing carbon dioxide and adding make-up oxygen from a tank of pure oxygen. Use of this equipment allows first responders to work for up to four hours without swapping out cylinders and
Cone calorimeter analysis was conducted on 18 thermoplastics with different UL-94 vertical burn test (V) ratings. Ratings varied from V-0 to no rating (NR), and the types of thermoplastics included were polycarbonate (PC), acrylonitrile-butadiene-styrene
While specialized wind tunnel tests are routinely conducted in the design of high-rise buildings, constraints on project budgets and timelines generally do not permit wind tunnel testing in the design of low-rise buildings. Instead, simplified wind load
There is a need for real-time identification of hazards to enable selection of appropriate respiratory protection for firefighters. The challenge is to transfer the protocols and technology used in industrial environments where the respiratory threats are
The thermal properties of fire resistive materials (FRMs) as a function of temperature critically influence their ability to protect a (steel) structure during a fire exposure. Measurement of these properties is complicated by the microstructural