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Search Publications

NIST Authors in Bold

Displaying 826 - 850 of 2189

Toward Manufacturing System Composability Analysis: A Use Case Scenario

September 20, 2014
Author(s)
Boonserm Kulvatunyou, Evan K. Wallace, Nenad Ivezic, Yunsu Lee
One of the characteristics of a smart manufacturing system is the ability to quickly adapt to new and changing requirements. This implies that software and hardware components of the manufacturing system need to be easily composed and recomposed. In

Obstacle Detection and Avoidance from an Automated Guided Vehicle

September 18, 2014
Author(s)
Roger V. Bostelman, William P. Shackleford, Geraldine S. Cheok
Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then stops

PMML in Manufacturing Applications

September 12, 2014
Author(s)
Yung-Tsun T. Lee, Juyeon Lee
In manufacturing, an enormous amount of data, both real and simulation data, is being continuously generated. The appropriate information, if extracted from big data, could provide insights on increasing sustainability, productivity, flexibility, and

Selective Area Growth of Ga- and N-polar GaN Nanowire Arrays on Non-Polar Si (111) Substrates

September 7, 2014
Author(s)
Matthew D. Brubaker, Shannon M. Duff, Todd E. Harvey, Paul T. Blanchard, Alexana Roshko, Aric W. Sanders, Norman A. Sanford
This study presents a technique for obtaining Ga- and N-polar Gallium Nitride nanowire (GaN NW) arrays on non-polar Si (111) substrates by use of polarity-controlled AlN/GaN buffer layers. AlN films are demonstrated to adopt Al-/N-polarity for N-/Al-rich

New AGV Capabilities are Safety Driven

September 3, 2014
Author(s)
Roger V. Bostelman, William P. Shackleford
Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then stops

Sustainability Characterization for Additive Manufacturing

August 21, 2014
Author(s)
Kevin W. Lyons, Satyandra K. Gupta
Additive manufacturing (AM) has the potential to create geometrically complex parts that require a high degree of customization, using less material and producing less waste. Recent studies have shown that AM can be an economically viable option for use by

Toward Metamodels for Composable and Reusable Additive Manufacturing Process Models

August 12, 2014
Author(s)
Paul W. Witherell, Shaw C. Feng, Timothy Simpson
Despite the existence and interest in additive manufacturing (AM) for many decades, industry adoption of AM technologies has been relatively slow. Recent advances in modeling and simulation of AM processes and materials are providing new insights to help

Performance Metrics for Evaluating Object and Human Detection and Tracking Systems

July 30, 2014
Author(s)
Afzal A. Godil, Roger Bostelman, William P. Shackleford, Tsai H. Hong, Michael O. Shneier
In this report, we provide an overview of various performance evaluation metrics for object detection and tracking for robot safety applications in smart manufacturing. We present four different types of performance evaluation metrics based on detection

Dielectric characterization by microwave cavity perturbation corrected for non-uniform fields

July 23, 2014
Author(s)
Nathan D. Orloff, Jan Obrzut, Christian J. Long, Thomas F. Lam, James C. Booth, David R. Novotny, James A. Liddle, Pavel Kabos
The non-uniform fields that occur due to the slot in the cavity through which the sample is inserted and those due to the sample geometry itself decrease the accuracy of dielectric characterization by cavity perturbation at microwave frequencies. To

Safety and Performance Standard Developments for Automated Guided Vehicles

July 23, 2014
Author(s)
Roger V. Bostelman, Tsai H. Hong, Roger D. Eastman
The American National Standards Institute/Industrial Truck Standards Development Foundation (ANSI/ITSDF) B56.5 Safety Standard committee for automated guided vehicles (AGVs) has been considering several changes to improve the standard. Of interest to the

Testing System of IEEE 1451.5-802.11 Standard-based Wireless Sensors

July 21, 2014
Author(s)
Kang B. Lee, Yuyin Song, Frederick M. Proctor
The hierarchical architecture of factory equipment networks consists of the factory level, cell level, and device level. The equipment at different levels of the factory networks may employ different network communication protocols. The challenges that

A Stiffness Model for Control and Analysis of a MEMS Hexapod Nanopositioner

July 9, 2014
Author(s)
Hongliang Shi, Hai-Jun Su, Nicholas Dagalakis
This paper presents a stiffness based kinematic model for analysis and control of a MEMS flexure-based hexapod nanopositioner that was previously built by the National Institute of Standards and Technology (NIST). This nanopositioner is capable of

Design of MEMS based three-axis motion stage by incorporating a nested structure

June 5, 2014
Author(s)
Yong Sik Kim, Nicholas G. Dagalakis, Satyandra K. Gupta
A new design of three degrees-of-freedom (DOFs) translational motion stage (XYZ-stage) is presented in this paper. This XYZ-stage is based on Micro-electro-mechanical systems (MEMS) and designed by combining three existing 1-DOF motion stages through a

BPMN Profile for Operational Requirements

June 2, 2014
Author(s)
Conrad E. Bock, Raphael Barbau, Anantha Narayanan Narayanan
An important aspect of systems and products is how they interact with their environment, including how they are operated. Behaviors external to systems usually involve people not trained in the details of how systems are designed and built, but who need to

AN INTEGRATED APPROACH TO INFORMATION MODELING FOR THE SUSTAINABLE DESIGN OF PRODUCTS

May 19, 2014
Author(s)
Paul W. Witherell, Douglas Eddy, Ian Grosse, Sundar Krishnamurty, Jack Wileden, Kemper Lewis
The design of more sustainable products can be best accomplished in a tradeoff-based design process that methodically handles conflicting objectives. Such conflicts are often seen between, environmental impact, cost, and product performance. To support

Ontological Conceptualization Based on Simple Knowledge Organization System (SKOS)

May 19, 2014
Author(s)
Nenad Ivezic, Ameri Farhad, Kaikhah Khosrow, Boonserm Kulvatunyou
In this paper, a thesaurus-based methodology is proposed for systematic ontological conceptualization in the manufacturing domain. The methodology has three main phases, namely, thesaurus development, thesaurus evaluation, and thesaurus conversion. A

Processes Analytics Formalism for Decision Guidance in Sustainable Manufacturing

May 19, 2014
Author(s)
Alexander Brodsky, Guodong Shao, Frank H. Riddick
This paper introduces National Institute of Standards and Technology (NIST)'s Sustainable Process Analytics Formalism (SPAF) to facilitate the use of simulation and optimization technologies for decision support in sustainable manufacturing. SPAF allows

Precise Latency Measurement of Unidirectional-Data-Flow Network Equipment

May 14, 2014
Author(s)
I-Chun Chao, Kang B. Lee, Frederick M. Proctor, Chien-Chung Shen, Fan-Ren Chang
In regards to network performance measurements, many timing indices, such as latency, jitter, and one-way delay (OWD), are getting more attention because real-time applications and needs are pushing higher network capabilities. Data latency in a network
Displaying 826 - 850 of 2189
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