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Displaying 776 - 800 of 2125

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

Control Fusion for Safe Multi-robot Coordination

May 9, 2014
Author(s)
Roger V. Bostelman, Jeremy A. Marvel
Future smart manufacturing systems will include more complex coordination of mobile manipulators (e.g., robot arms mounted on mobile bases). The National Institute of Standards and Technology, Performance of Collaborative Robot Systems Project has been

A Roadmap to Advance Measurement Science in Robot Dexterity and Manipulation

May 1, 2014
Author(s)
Joseph A. Falco, Jeremy A. Marvel, Elena R. Messina
In order for robots to expand their applicability within manufacturing operations, their dexterity needs to advance considerably. There is active research in many areas that is contributing to creating a new generation of much more dexterous arms and hands

Time-resolved surface infrared spectroscopy during atomic layer deposition of TiO2 using tetrakis(dimethylamido)titanium and water

April 23, 2014
Author(s)
Brent A. Sperling, John Hoang, William A. Kimes, James E. Maslar, Kristen L. Steffens, Nhan V. Nguyen
Atomic layer deposition of titanium dioxide using tetrakis(dimethylamido)titanium (TDMAT) and water vapor is studied by reflection-absorption infrared spectroscopy (RAIRS) with a time resolution of 120 ms. Decomposition of the adsorbed TDMAT is observed

Methods for improving visibility measurement standards of powered industrial vehicles

February 28, 2014
Author(s)
Roger V. Bostelman, Jochen Teizer, Soumitry J. Ray, Mike Agronin, Dominic Albanese
Poor visibility of powered industrial vehicles, such as forklifts, used in industry is often the cause of accidents that include pedestrians. Current standards allow up to 20% non-visible regions for forklifts where measurement of these regions is

Characterization of InGaN quantum disks in GaN nanowires

February 27, 2014
Author(s)
Alexana Roshko, Roy H. Geiss, John B. Schlager, Matthew D. Brubaker, Kristine A. Bertness, Norman A. Sanford, Todd E. Harvey
Catalyst-free GaN nanowires with InGaN quantum disks (QDs) were characterized by scanning/transmission electron microscopy (S/TEM) and photoluminescence. A variety of structures, from QDs with large strain fields to apparently strain free QDs were observed

Laser-assisted atom probe tomography of MBE grown GaN nanowire heterostructures

February 24, 2014
Author(s)
Norman A. Sanford, Paul T. Blanchard, Matthew D. Brubaker, Kristine A. Bertness, John B. Schlager, R Kirchofer, David R. Diercks, Brian Gorman
Laser-assisted atom probe tomography (L-APT) was performed on GaN nanowires (NWs) and axial GaN/InGaN nanowire heterostructures. All samples were grown by MBE on Si(111) substrates. The laser pulse energy (PE) at 355 nm used in L-APT analysis of GaN NWs

Metrological challenges introduced by new tolerancing standards

February 13, 2014
Author(s)
Ed Morse, Yue Peng, Vijay Srinivasan, Craig M. Shakarji
The recent release of ISO has provided designers with a richer set of specification tools for the size of part features, so that various functional requirements can be captured with greater fidelity [2]. However, these tools also bring new challenges and

The U.S. Manufacturing Value Chain: An International Perspective

February 10, 2014
Author(s)
Douglas Thomas
This report uses input-output data from the World Input-Output Database along with the methods developed by Wassily Leontief to track the intermediate goods and services used in national manufacturing industries. Specifically, it examines the extent that

Interoperability for Virtual Manufacturing systems

January 14, 2014
Author(s)
Yung-Tsun Lee, Juyeon Lee, Frank H. Riddick, Donald E. Libes, Deogratias Kibira
Manufacturing systems are often costly to develop and operate. Simulation technology has been demonstrated to be an effective tool for improving manufacturing system design and the efficiency of manufacturing operations and maintenance. However, to use

An Ontology Based Approach to Action Verification for Agile Manufacturing

January 10, 2014
Author(s)
Zeid Kootbally, Stephen B. Balakirsky
Many of today's robotic work cells are unable to detect when an action failure has occurred. This results in faulty products being sent down the line, and/or downtime for the cell as failures are detected and corrected. This article examines a novel
Displaying 776 - 800 of 2125