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Conferences

Numerical Modeling of Fire Spread Through Individual Trees and Shrubs

February 19, 2017

Author(s)

William E. Mell, Samuel Manzello, Alexander Maranghides

Fire spread through suspended vegetation, such as tree crowns, is a basic component of wildland fires. Most models of fire spread do not resolve the burning of...

Aerodynamic Time-History and Climatological Databases for Prescriptive and Performance-Based Wind Loading Provisions

February 19, 2017

Author(s)

Emil Simiu, T Whalen

We summarize results of ongoing research at the National Institute of Standards and Technology into the development of a new generation of standard provisions...

Flexible Polyurethane Foams Nanocomposites

February 19, 2017

Author(s)

Mauro Zammarano, Roland H. Kraemer, Richard H. Harris Jr., Thomas J. Ohlemiller, Sameer Rahatekar, Jeffrey W. Gilman

Polyurethane flexible foams (PUFs) have a large market as upholstery and bedding cushioning material. There is an increasing demand for flame retarded grades in...

Chapter 48: Robotics in Construction

February 19, 2017

Author(s)

Kamel S. Saidi, Jonathan O'Brien, Alan M. Lytle

This chapter introduces the various construction automation concepts that have been developed over the past few decades and presents examples of construction...

Reconnaissance of Damage to Physical Structures in the Gulf States From Hurricanes Katrina and Rita

February 19, 2017

Author(s)

William P. Fritz

The National Institute of Standards and Technology (NIST) led reconnaissance to assess the performance of physical structures during Hurricane Katrina and...

Wind Effects on High-Rise Buildings: Database-Assisted Design Versus the High-Frequency Force-Balance Technique

February 19, 2017

Author(s)

M Iancovici, Michael A. Riley, Fahim H. Sadek, Emil Simiu

Database-assisted design (DAD) was originally developed for low-rise buildings. In this paper we show that it applies to flexible high-rise buildings as well...

Applicability of Database-Assisted Design to Tall Buildings

February 19, 2017

Author(s)

William P. Fritz

Wind Speeds for the Estimation of World Trade Center Towers' Response

February 19, 2017

Author(s)

William P. Fritz, Fahim H. Sadek, Emil Simiu

Estimates of the World Trade Center (WTC) towers response to wind by two North American wind engineering laboratories differed from each other by almost 40 %. A...

Polyurethane Composites Reinforced by Isocyanate-Functionalized Multi-Walled Carbon Nanotubes and Carbon Nanofibers

February 19, 2017

Author(s)

Aline Granier, Tinh Nguyen, Alexander J. Shapiro, Jonathan W. Martin

The performance of polyurethane (PU) composites reinforced by isocyanate-functionalized multi-walled carbon nanotubes (NCO-fMWCNT) and isocyanate-functionalized...

X-Ray Absorption Fine-Structure Determination of Ferroelectric Distortion in SrtiO₃ Thin Films grown on Si(001)

February 19, 2017

Author(s)

Joseph Woicik, F S. Aguirre-Tostado, A Herrera-Gomez, R Droopad, Z Yu, D G. Schlom, E Karapetrova, P Zschack, P Pianetta

Polarization-dependent x-ray absorption fine structure together with x-ray diffraction have been used to study the local structure in SrTiO 3 thin films grown...

Characterization of Solid Oxide Fuel Cell Layers by Computed X-Ray Microtomography and Small-Angle Scattering

February 19, 2017

Author(s)

Andrew J. Allen, T A. Dobbins, J Ilavsky, Fu Zhao, A Virkar, J Almer, F DeCarlo

The 48th Annual Denver X-Ray Conference

February 19, 2017

Author(s)

Winnie Wong-Ng

The 48th Annual Denver X-ray Conference took place at Sheraton Steamboat Resort, Colorado, from August 2-6, 1999. This meeting was well attended, with a...

Microstructure-Wear Resistance Relationships for YSZ and Alumina Plasma Sprayed Deposits

February 19, 2017

Author(s)

J Ilavsky, H Boukari

A simple sectioning method was applied to investigate the changes in the wear resistance of two thermally sprayed deposits, two yttrium-stabilized zirconia (YSZ...

Relationship Between Microstructure and Wear of Dental Ceramics and Composite Resins

February 19, 2017

Author(s)

V S. Nagarajan, S Jahanmir, B Hockey, Victoria Thompson

The effect of microstructure on the wear mechanisms of glass-ceramics and resin composites was studied. Wear tests on both types of materials were conducted...

Strain-Induced Ferroelectric SrTiO₃ Thin Films Grown Coherently on Si(001): Experiment and Theory

February 19, 2017

Author(s)

Joseph Woicik, Eric L. Shirley, Daniel A. Fischer, S Sambasivan, C R. Ashman, C S. Hellberg, H Li

Ferroelectric crystals possess an electric dipole moment even in the absence of an external electric field. In order for this spontaneous polarization to arise...

New Synchrotron X-Ray Techniques for In-Situ Deformation Studies

February 19, 2017

Author(s)

Lyle E. Levine, R Thomson, Gabrielle G. Long, David R. Black

Many types of defects contribute to local and long-range stresses and strains in materials. These include vacancies, voids, prismatic loops, interstitials...

Thermal Diffusivity of AIN Using the Photothermal Deflection Technique

February 19, 2017

Author(s)

E J. Gonzalez

The thermal conductivity of AIN specimens doped with Y2O3(5 wt.%) was determined using the photothermal deflection technique. The results agree within 10% of...

Versatile USAXS (Bonse-Hart) Facility for Advanced Materials Research

February 19, 2017

Author(s)

J Ilavsky, P Jemain, Andrew J. Allen, Gabrielle G. Long

The USAXS facility at UNICAT Sector 33 at the Advanced Photon Source (APS) is a world-class resource for advanced materials research emphasizing full-range...

Phase Equilibria of the High Tc Superconductors in the (Bi, Pb) -SR-Ca-Cu-O System

February 19, 2017

Author(s)

Winnie Wong-Ng, Lawrence P. Cook, W Greenwood, Anthony J. Kearsley

Applications of (Bi,Pb)-Sr-Ca-Cu-O phase equilibria include material synthesis, melt processing and single crystal growth. Both liquidus and subsolidus data are...

Applications of Ceramics for Healthcare: The Future Has Begun

February 19, 2017

Author(s)

Grady S. White

Dramatic improvements in our understanding of how biological systems work, diseases initiate, and illnesses progress have given rise to the expectation that...

Influence of Particle Size on DCPD Hydrolysis and Setting Properties of TTCP/DCPD Cement

February 19, 2017

Author(s)

Limin Sun, Laurence C. Chow, Shozo Takagi, Elena F. Burguera, Stanislav Frukhtbeyn

This study investigated the effects of particle size on the hydrolysis reaction of DCPD at pH 7 and 37 C and on the setting properties of a TTCP/DCPD cement...

Transient Creep Cavity Growth in Structural Ceramics

February 19, 2017

Author(s)

A F. Bower, Tze J. Chuang

Long-term service life of a load-bearing ceramic component such as a turbine blade atelevated temperatures is often controlled by the rates of nucleation and...

Enhancement of Mercuric Iodide Detector Performance Through Crystal Growth in Microgravity: The Roles of Lattice Order

February 19, 2017

Author(s)

B W. Steiner, L van den Berg, U Laor

The hole mobility and carrier lifetime of [alpha] mercuric iodide high energy radiation detectors have been enhanced through crystal growth in microgravity. The...

Boundary Lubricated Friction Experiments With Coarse Surface Texture

February 19, 2017

Author(s)

Jorn Larsen-Basse, L K. Ives, Stephen M. Hsu

Low-speed friction experiments were conducted under boundary lubrication in a pin-on-disk tester. The 304 stainless steel disk had smooth areas alternating with...

Effects of Large Grains on Transgranular Fracture Toughness

February 19, 2017

Author(s)

Stephen W. Freiman

This paper addresses issues of fracture for materials in which large grains, exist in a matrix of much smaller grains. Materials used for optical components...

Role of Melting Equilbria in the Processing of High T-c Superconductors in the BSCCO System

February 19, 2017

Author(s)

Winnie Wong-Ng, Lawrence P. Cook, Anthony J. Kearsley, A R. Roosen

Three types of liquids were found in the BSCCO system: transient, metastable, and stable liquids. The roles of these liquids are discussed with examples...

Effect of Colloidal Probe Random Surface Features on Adhesion

February 19, 2017

Author(s)

Seung H. Yang, Stephen M. Hsu

We have uncovered the fact that colloidal probes often have random surface features which when not properly accounted for, can significantly affect the...

Development of Multilayer Analyzer Array Detectors for X-Ray Fluorescence at the Third Generation Synchrotron Source

February 19, 2017

Author(s)

K Zhang, G Rosenbaum, R Liu, G Bunker, C Y. Liu, Daniel A. Fischer

The development of Multilayer Analyzer Array Detector (MADD) for X-ray fluorescence is to eliminate the count rate limitation encountered with the multi-element...

Nanofriction: The Observation of Elastic Plowing

February 19, 2017

Author(s)

Z C. Ying, Stephen M. Hsu

Accurate friction measurement at nanoscale is critical in reliable device design. Literature papers have reported different friction values for the same...

Imaging Optics and CCD Camera Characterization for Metrology

February 19, 2017

Author(s)

S Fox, Edward A. Kornegay, Richard M. Silver

Optical semiconductor characterization and metrology rely heavily on digital camera imaging and its associated optical imaging systems. This work characterizes...

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