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Displaying 51726 - 51750 of 73892

Interleave in Peace, or Interleave in Pieces

September 1, 1998
Author(s)
Isabel M. Beichl, F Sullivan
Bit interleaving is a technique that sometimes can collapse a problem of high-dimensional data to one of lower dimensional data. Our favorite use is going from two or three dimensions to one dimension. Of course, you lose something in this process because

Internet-Based Delivery of CAD/CAM Capability: An Industry Case Study

September 1, 1998
Author(s)
Simon Szykman, Ram D. Sriram
This paper presents a case study in the use of the Internet as a medium for exchange of information and delivery of computer-aided design and computer-aided manufacturing (CAD/CAM) capability. The case study describes collaboration among researchers and

JAVA-Based Tools for Development and Diagnosis of Real-Time Control Systems

September 1, 1998
Author(s)
William P. Shackleford, Frederick M. Proctor
The National Institute of Standards and Technology (NIST) has been using the Real-time Control System (RCS) Reference Model Architecture for building control systems based on a hierarchy of cyclically executing control modules. This paper describes the

Kinematic Fixturing with Respect to a Plane Using Contact Sensing

September 1, 1998
Author(s)
Walter W. Nederbragt, Bahram Ravani
This paper presents a method for determining the location of geometric elements that compose the external features of referencing fixtures. Since in most applications parts that are handled in robotic work-cells are on a worktable or a floor, this paper

Masked Ion Beam Lithography with Highly Charged Ions

September 1, 1998
Author(s)
John D. Gillaspy, D Parks, L P. Ratliff
Masked ion beam lithography using highly charged ions is demonstrated for the first time by producing an array of hundreds of ordered micrometer wide dots using Xe 44+ on Poly(Methylmrthacrylate) resist. At low dose exposure of the resist is incomplete and

Materials and Fracture Mechanics Assessments of Railroad Tank Cars

September 1, 1998
Author(s)
A Zahoor, G E. Hicho
This report presents a review of fracture mechanics assessments and the mechanical and fracture toughness data for four steels used in the manufacture of railroad tank cars that carry hazardous materials. Thirteen reports developed between 1975 and 1995 by

Mechanical Hardness: Atomic-Level Calculations for Diamond-Like Materials

September 1, 1998
Author(s)
D G. Clerc
Calculations of atomic-level mechanical hardness are reported for fice diamond-like materials: diamond, silica, β-silicon-carbide, β-boron-nitride, and boron phosphide. These calculations employ a hardness model based on screened electrostatics and elastic

Minimizing Error Sources in Gage Block Mechanical Comparison Measurements

September 1, 1998
Author(s)
Bryon S. Faust, John R. Stoup, Debra K. Stanfield
Error sources in gage block mechanical comparisons can range from classical textbook examples (thermal gradients, correct temperature value, and correct master value) to a completely counter-intuitive example of diamond probe tip wear at low applied force

Mission Structure for an Unmanned Vehicle

September 1, 1998
Author(s)
A Meystel, Yigal Moscovitz, Elena R. Messina
The 4-D/Real-Time Control Systems Architecture (4- D/RCS) defines a hierarchical decomposition for intelligent systems, with corresponding command and control pathways. In order to design the vehicle¿s behavior generation functions, we developed a set of

Multiple Small-Angle Neutron Scattering

September 1, 1998
Author(s)
Gabrielle G. Long, Susan Krueger, Andrew J. Allen
Over the past decade, a multiple small-angle neutron scattering (MSANS) formalism has been developed to enable researchers to derive microstructural parameters from multiply-scattered small-angle neutron data. The MSANS formalism is particularly useful in
Displaying 51726 - 51750 of 73892
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