Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Conferences

The Increasing Role of Fractography in the Dental Community

October 16, 2008

Author(s)

Janet Quinn, Susanne Scherrer, George D. Quinn

The development of new fabrication capabilities along with new alloys, polymers, composites and advanced ceramics has revolutionized many industries including...

Effects of Proteins on Metal Corrosion

October 16, 2008

Author(s)

H J. Mueller

A previous report (Mueller, IMS, Ottawa, Canada, 1998) revealed that the modeled equivalent electrical circuits for either silver or copper surfaces were...

Incorporation of Stereo, Regio and Comonomer Defects Into the Crystalline Regions of Isotactic Polypropylene: Results From NMR, Molecular Dynamics and Chemical Shift Calculations

October 16, 2008

Author(s)

David L. VanderHart, Marc R. Nyden, R G. Alamo, L Mandelkern

We have shown that under conditions of crystallization during cooling at 1C/min, substantial amounts of 'defects' of the types a) stereo-mrrm, b) regio-2,1...

Measuring Flow Boundary Conditions and Nano-Scale Coating Processes During Sharkskin Melt Fracture

October 16, 2008

Author(s)

Kalman Migler

Micelles formed of amphiphilic diblock copolymers may have applications in drug delivery and in understanding the physics of biological structures. Wormlike...

A Finite Volume PDE Solver Using Python (FiPy)

October 16, 2008

Author(s)

Jonathan E. Guyer, Daniel Wheeler, James A. Warren

We present an object oriented partial differential equation (PDE) solver written in Python based on a standard finite volume (FV) approach.The solution of...

Microscale Test Technique and Test Results for Aluminum Thin Films

October 16, 2008

Author(s)

David T. Read, Joseph D. McColskey, Yi-Wen Cheng

A microscale, skyhook-type tensile-test technique has been developed to extend tensile testing to micrometer-scale specimens. This technique has been used to...

Characterization of the Alloy-Solution Interface

October 16, 2008

Author(s)

H J. Mueller

For metals undergoing corrosion, a layer of water molecules becomes charged due to electrons accumulating on the outer metal surface and hydrated positive ions...

Perspectives on the Future of Manufacturing Engineering

October 16, 2008

Author(s)

R Jackson

Technology-based competition is heating up everywhere. One economist uses the analogy-not of a race--but of a casino to convey the flavor of the global...

Surface-Enganced Thermal Pulse Measurements of the Thermal and Electrical Properties of Polyimide Films

October 16, 2008

Author(s)

A S. DeReggi, Erik K. Hobbie, P Bloss, H Schafer

Polyimide films formed on silicon by spin coating and curing of foils glued to substrates generally show a sharp surface-bound negative charge layer with a half...

Experimental Procedures and Results for Benchmark 3: Stage 2 Forming Process

October 16, 2008

Author(s)

Mark Iadicola, Timothy J. Foecke, T B. Stoughton

The Numisheet 2005 Benchmark #3 consists of a two stage forming process performed on four materials (three steels and one aluminum). Stage 1 consists of forming...

Process Monitoring of Polymer/Clay Nanocomposites Compounding Using Dielectric, Optical Transmission and Fluorescence Measurements

October 16, 2008

Author(s)

Anthony J. Bur, T Y. Lee, S C. Roth, P R. Start

A family of nylons, nylon 6, 11 and 12, have been compounded with organo modified clays using a twin screw extruder that was instrumented with dielectric and...

Measurement of Slippage Induced by a Polymer Processing Additive

October 16, 2008

Author(s)

Kalman Migler, C L. Gettinger, V P. Thlacker, R Conway

Flow profiles of a linear density polyethylene (LLDPE) were measured in an optical slit die situated at the exit of a twin screw extruder. The velocities of...

Process Monitoring at the National Instute of Standards and Technology: Celebrating 100 Years of Measurement Excellence

October 16, 2008

Author(s)

Anthony J. Bur, Kalman Migler, Robert S. Roth

Two events that coincide in the year 2001 are the NIST centennial year anniversary and the inauguration of the SPE Special Interest Group on Process Monitoring...

Modeling Morphological Evolution During Dendritic Solidification Using a Cellular Automation

October 16, 2008

Author(s)

R E. Napolitano, T H. Sanders

Morphological evolution of a dendritic growth front in a binary alloy is simulated using a cellular automation approach to establish the feasibility of modeling...

The Influence of Additives on the Room-Temperature Recrystallization of Electrodeposited Copper

October 16, 2008

Author(s)

Gery R. Stafford, Mark D. Vaudin, Thomas P. Moffat, N G. Armstrong, David R. Kelley

The recrystallization behavior of copper, electrodeposited from a copper sulfate-sulfuric acid plating bath into which various combinations of NaCl, sodium 3...

Report to The Medical Devices Standards Board

October 16, 2008

Author(s)

John A. Tesk

News of recent NIST standards-related activities are presented for information to the Medical Devices Standards Board. These include the release of reference...

Scanning Acoustic Microscopy Stress Measurements in Electronic Packaging

October 16, 2008

Author(s)

E Drescher-Krasicka, T M. Moore, T Hartfield, D Chery

Scanning acoustic microscopy has been successfully implemented for the nondestructive detection of cracks and delaminations in integrated circuit packages. In...

A Multi-Sample Melt Micro-Rheometer

October 16, 2008

Author(s)

Anthony J. Bur, Kalman Migler

A slit micro-rheometer that is used for simultaneous measurement of melt viscosities of four samples has been developed. Sample size is less than 100 mg. The...

Chromatographic Separation of Single Wall Carbon Nanotubes

October 16, 2008

Author(s)

Barry J. Bauer, Vardhan Bajpai, Jeffrey Fagan, Matthew Becker, Erik K. Hobbie

Size exclusion chromatography (SEC) has been used to separate single wall carbon nanotubes (SWNT) dispersed by chemical modification in organic solvents and by...

The Growth-Path Method for Prediction of Spurious Grain Nucleation in Single-Crystal Castings

October 16, 2008

Author(s)

R E. Napolitano, A R. Roosen, Robert J. Schaefer

Prediction of spurious grain formation in superalloy castings is critical for the design and development of single-crystal gas-turbine components. Here, we...

Multi-Scale Discrete Dislocation Plasticity Analysis: Application to Nano-indentation

October 16, 2008

Author(s)

S M. Khan, Lyle E. Levine

To closely analyze the dislocation structure evolution during nano-indentation, a multi-scale discrete dislocation plasticity code is modified to include nano...

Dynamic Material Properties for Machining Simulation Using the NIST Pulse-Heated Kolsky Bar

October 16, 2008

Author(s)

Richard L. Rhorer

The modeling or simulation of machining processes is important for economically implementing new manufacturing processes such as high-speed milling or...

Stress Relaxation of Poly(ethylene Naphthalate): Isothermal, Isochronal and Isostructural Responses

October 16, 2008

Author(s)

M L. Cerrada, G B. McKenna

The physical aging response of polymers is generally examined in isothermal conditions by following the viscoelastic behavior as a function of aging time. It is...

In-Situ Visualization of Novel Polymer Droplet Morphologies During Extrusion

October 16, 2008

Author(s)

Erik K. Hobbie, Kalman Migler

We report the observation of novel droplet morphologies in the high stress layers near the walls of a specially instrumented slit die. We utilize in-situ...

Modeling Complex Aftereffect Behavior in Recording Materials Using a Preisach-Arrhenius Approach

October 16, 2008

Author(s)

Edward Della Torre, Lawrence H. Bennett, L Swartzendruber

A Preisach-Arrhenius aftereffect model, that accurately calculates the entire relaxation process, including the linear log-time region, is used to describe some...

A Description of the Fluoroelastomer Coating Evolution as a Polymer Processing Aid

October 16, 2008

Author(s)

Mathurin G. Meillon, D Morgan, D Bigio, Kalman Migler, S Oriani

For decades, fluoroelastomers have been used as polymer processing aids (PPA). Previous works have measured the thickness of the PPA coating, its effects on the...

An Optical Sensor for Measuring Fluorescence Anisotropy of Oriented Polymers

October 16, 2008

Author(s)

S C. Roth, Anthony J. Bur

An optical sensor containing polarizing optical components has been constructed for the purpose of measuring fluorescence anisotropy of fluorescent dyes. The...

Effect of Signal-Processing Parameters on Phase Velocity Uncertainty

October 16, 2008

Author(s)

M C. Renken, C M. Fortunko, C T. Mullis

Quantification of signal-processing effects is required for an accurate determination (less than 1% uncertainty) of the absolute phase velocity, particularly...

Craze Growth in Stress Relaxation Conditions: Effects of Physical Aging

October 16, 2008

Author(s)

M Delin, G B. McKenna

Growth of crazes during stress relaxation has been examined under physical aging conditions at four temperatures, from ambient to 60 degrees} C, for a styrene...

Evaluation of Cell Source for Tissue Engineered Ligament: Anterior Cruciate Ligament (ACL), Medial Collateral Ligament (MCL), Achilles Tendon (AT) and Patellar Tendon (PT)

October 16, 2008

Author(s)

James A. Cooper, L A. Bailey, Janell N. Carter, Cynthia Castiglioni, Michelle D. Kofron, Frank K. Ko, Cato T. Laurencin

This study investigated four different connective tissue cell types to determine which cell type is an optimal source for seeding a tissue-engineered Anterior...

Was this page helpful?