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Displaying 1076 - 1100 of 2125

Single-query, Bi-directional, Lazy Roadmap Planner Applied to Car-like Robots

May 8, 2010
Author(s)
Stephen B. Balakirsky, Denis Denis Dimitrov
The Single-query, Bi-directional, Lazy roadmap (SBL) algorithm successfully builds upon the traditional Probabilistic Roadmaps (PRM) approach by introducing a number of related optimizations. While these optimizations are applicable in the domain of car

Product Modeling Framework and Language for Behavior Evaluation

May 2, 2010
Author(s)
Jae H. Lee, Steven J. Fenves, Conrad E. Bock, Hyo Won Suh, Sudarsan Rachuri, Xenia Fiorentini, Ram D. Sriram
Supporting different stakeholder viewpoints across the product s entire lifecycle requires semantic richness for representing product related information. This paper proposes a multi-layered product-modeling framework that enables stakeholders to define

Evaluating The RoboCup 2009 Virtual Robot Rescue Competition

April 22, 2010
Author(s)
Stephen B. Balakirsky, Stefano Carpin, Arnoud Visser
The 2009 RoboCup Competitions took place in Graz Austria in July of 2009. The Virtual Robot Rescue Competition included 11 competitors from 10 different countries. The main objective of this competition is to utilize teams of robots to perform an urban

Performance of Critical Flow Venturis under Transient Conditions

April 13, 2010
Author(s)
John D. Wright
Critical flow venturis (CFVs) can be used to measure flow under transient pressure and flow conditions with uncertainties of 0.13 % or less (95 % confidence level). Blow-down tests transferred 630 g of nitrogen during a 100 s interval from an unregulated

A Semantic Product Modeling Framework and Language for Behavior Evaluation

April 8, 2010
Author(s)
Jae H. Lee, Hyo Won Suh, Steven J. Fenves, Sudarsan Rachuri, Xenia Fiorentini, Ram D. Sriram, Conrad E. Bock
Supporting different stakeholder viewpoints across the product's entire lifecycle requires semantic richness for representing product related information. This paper proposes a multi-layered product modeling framework that enables stakeholders to define

Modeling of the Temperature Field in the Chip and in the Tool in High-speed Machining of a Carbon Steel: Effect of Pearlite to Austenite Phase Transition in AISI 1075

April 7, 2010
Author(s)
Timothy J. Burns, Steven P. Mates, Richard L. Rhorer, Eric P. Whitenton, Debasis Basak, Russell H. McFadden
A one-dimensional transient finite-difference model for the temperature distribution in orthogonal metal cutting, which was originally developed by Boothroyd, and then improved upon by Tlusty, is used to calculate the temperature field in the chip and in

The Limits and Extensibility of Optical Patterned Defect Inspection

April 1, 2010
Author(s)
Richard M. Silver, Bryan M. Barnes, Martin Y. Sohn, Richard Quintanilha, Hui Zhou, Chris Deeb, Mark Johnson, Milton Goodwin, Dilip Patel
New techniques recently developed at the National Institute of Standards and Technology using bright field optical tools are applied to signal-based defect analysis of features with dimensions well below the measurement wavelength. A key to this approach

AP210 Edition 2 Concept of Operations

March 26, 2010
Author(s)
Kevin G. Brady, Jamie Stori, Thomas Thurman
One of the most prevalent requirements of manufacturing industries today is the need to exchange and share product information within and between enterprises. This becomes almost impossible without a standardized, computer-interpretable method of

A RESTful Web Service for Virtual Supply Chain Time Management

March 25, 2010
Author(s)
Guillaume Radde
A common issue when building distributed simulations is the issue of time management. Each discrete event simulation has its own notion of time, and a mechanism needs to be set up to allow each simulation to run at the same pace. Different architectures

Benchmarking and Standardization of Intelligent Robotic Systems

March 18, 2010
Author(s)
Rajmohan Madhavan, R Lakaemper, Tamas Kalmar-Nagy
From mundane and repetitive tasks to assisting first responders in saving lives of victims in disaster scenarios, robots are expected to play an important role in our lives in the coming years. Despite recent advances in mobile robotic systems, lack of

The Nanomechanical Properties of Thin Film of Type I Collagen Fibrils

March 2, 2010
Author(s)
Koo-Hyun Chung, Kiran Bhadriraju, Tighe Spurlin, Robert F. Cook, Anne L. Plant
Cells sense and respond to the mechanical properties of the substrate to which they adhere. Matrices composed of collagen have been an important experimental system to study cell responses to the stiffness of the extracellular matrix. We had previously

Interoperability for Simulation of Sustainable Manufacturing

February 24, 2010
Author(s)
Guodong Shao, Nils E. Bengtsson, Bjoern J. Johansson
Sustainability has become a very significant research topic, it impacts many different manufacturing industries. To achieve sustainable manufacturing, designing manufacturing systems that have less negative impact on the environment is critical. Modeling

Precision Engineering Division 2009 Program Technical Accomplishments

February 19, 2010
Author(s)
Michael T. Postek
The Precision Engineering Division (PED) is one of five divisions of the Manufacturing Engineering Laboratory (MEL)at the National Institute of Standards and Technology (NIST). PED provides the United States with the foundation for dimensional measurements

Development Overview of Sustainable Manufacturing Metrics

February 18, 2010
Author(s)
Shaw C. Feng, Che B. Joung
The manufacturing industry is facing the challenge of measuring sustainability performance in a product s life cycle. Developing metrics for sustainable manufacturing is critical to enable manufacturing companies to quantitatively measure the

NETWORK-CENTRIC PRODUCT REALIZATION AND THE ROLE OF STANDARDS

February 18, 2010
Author(s)
Ram D. Sriram, Albert W. Jones, Mahesh Mani, Sudarsan Rachuri, Eswaran Subrahmanian
The early part of this millennium has witnessed the emergence of an Internet-based engineering marketplace. Here, engineers, designers, and manufacturers from small and large companies can collaborate electronically in various product development and

Performance Measures Framework for Unmanned Systems (PerMFUS): Initial Perspective

February 18, 2010
Author(s)
Hui-Min Huang, Elena R. Messina, Adam S. Jacoff
The performance of intelligent unmanned systems (UMS) must be able to be measured to ensure that they can meet the operational requirements. A generic framework to enable capturing and organizing the performance metrics are highly desirable. In this
Displaying 1076 - 1100 of 2125