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Xiaohong Gu, Tinh Nguyen, Michael J. Fasolka, Mark R. VanLandingham, Jonathan W. Martin
Atomic force microscopy (AFM) has played an increasingly important role in characterizing surface morphology and surface properties of materials. However, the ability to identify and map the surface chemical heterogeneity has remained an unfulfilled
The objective of fire hazard and risk analyses is to estimate conditions of safety for people, including those that are more sensitive to fire smoke than others. For this purpose, this paper develops a method for estimating, from information on lethal and
Marc R. Nyden, Stanislav Stoliarov, Sean Crowley, C S. Jee, Z X. Guo
Polymer debinding is involved in many powder metallurgy processes, where clean removal of the binder is essential to ensure a sound product. Polyisobutylene (PIB) is under consideration for application as a fugitive binder for titanium (Ti) powder casting
A quarter century ago, a revolution occurred in the U.S. low-sloped roofing industry with the introduction of a number of new membrane products including elastomeric and thermoplastic polymeric membranes and polymer-modified bituminous membranes. Today
Jason D. Averill, Dennis S. Mileti, Richard D. Peacock, Erica D. Kuligowski, N Groner, Guylene Proulx, H Nelson
This paper presents the findings of the NIST World Trade Center Investigation describing the occupant evacuation of WTC 1 and WTC 2 on September 11, 2001. The egress system, including stairwells and elevators, is described along with the evacuation
X Feng, Edward Garboczi, Jeffrey W. Bullard, Kenneth A. Snyder, Paul E. Stutzman, T Mason
This report summarizes a project that dealt with the characterization of a fly ash and fly-ash blended cement material, so that these could be incorporated into the Virtual Cement and Concrete Testing Laboratory (VCCTL) software. The information generated
The concept of designing buildings to resist loads is fundamental to the design and regulatory process. Fire has traditionally been addressed differently because fires are difficult to describe in the same way as other building loads. This paper proposes a
Three standard fire resistance tests (ASTM E 119) were conducted on a composite floor system to study the effects of 1) test restraint conditions, and 2) scale of the test. Two full-scale tests, 35 ft (10.7 m) span, and one half-scale test, 17 ft (5.2 m)
This report describes results obtained from a fire protection engineering analysis of an historic government office building located in Washington, DC. The Dwight D. Eisenhower Executive Office Building is a five story building constructed in the 1870 s to
The collapse of the World Trade Center towers on September 11, 2001, resulting from a combination of aircraft impact damage and subsequent fires, was studied as part of the Federal Building and Fire Safety Investigation of the World Trade Center Disaster
We have carried out first-principles calculation of Tc and other relevant parameters of the new 40 K superconductor MgB2. Our results are in excellent agreement with the neutron measurements of phonons as well as with the measured boron isotope effect and