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Displaying 27176 - 27200 of 73830

Superconductor Science and Technology

February 22, 2010
Author(s)
Kent D. Irwin, Michael D. Niemack, Joern Beyer, Hsiao-Mei Cho, William B. Doriese, Gene C. Hilton, Carl D. Reintsema, Daniel R. Schmidt, Joel N. Ullom, Leila R. Vale
Multiplexed superconducting quantum interference device (SQUID) amplifiers have recently enabled the deployment of kilopixel arrays of superconducting transition-edge sensor (TES) detectors on a variety of receivers for astrophysics. Existing multiplexing

Little Things Mean a Lot: Water and the Adhesive Bond

February 21, 2010
Author(s)
Donald L. Hunston, Kar T. Tan, Bryan D. Vogt, Sushil K. Satija, Cyril Clerici, David E. White
The ability of water to dramatically weaken many types of adhesive bonds has been widely studied. One surprising result is the existence of a critical moisture level in the bond. Above this level the strength drops to very low values. Numerous studies have

Roles of Adhesive and Interfacial Properties on Humidity-induced Failure

February 21, 2010
Author(s)
Kar T. Tan, Christopher C. White, Donald L. Hunston, Kristen L. Steffens, Hatlee Timothy, Kristen Hamilton, Vogt D. Bryan
Adhesion loss due to moisture is a fundamental problem in a large diversity of industries ranging from microelectronics and automotive to aerospace. This study investigates the durability of model adhesive joints consisting of a homologous series of poly(n

Melting and Spread of Polymers in Fire with the Particle Finite Element Method

February 19, 2010
Author(s)
Eugenio Onate, Riccardo Rossi, Sergio R. Idelsohn, Kathryn Butler
A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method (PFEM), combines concepts from particle-based techniques with those of the standard

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

Coexisting Magnetic Order and Cooperative Paramagnetism in the Stuffed Pyrochlore Tb 2+x Ti 2-2x Nb x O 7

February 18, 2010
Author(s)
Benjamin Ueland, Jason S. Gardner, A. J. Williams, M. L. Dahlberg, J.G. Kim, Yiming Qiu, John R. Copley, P. Schiffer, R J. Cava
Neutron scattering and magnetization measurements have been performed on the stuffed pyrochlore system Tb 2+xTi 2-2xNb xO 7. We find that despite the introduction of chemical disorder and increasingly antiferromagnetic interactions, cooperative

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

Fluorinated Copolymer Nanoparticles for Multimodal Imaging Applications

February 18, 2010
Author(s)
Mark M. Bailey, Christine M. Mahoney, Elodie Dempah, Jeffrey M. Davis, Matthew Becker, Supang Khondee, Eric J. Munson, Cory J. Berkland
Nanomaterials have emerged as valuable tools in biomedical imaging techniques, such as magnetic resonance imaging (MRI), fluorescence, positron emission tomography (PET), and others. Some have been designed to serve as multimodal imaging agents, combining

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

A Combinatorial Study of Thin Film Process Variables Using Microhotplates

February 17, 2010
Author(s)
David L. Lahr, Joshua L. Hertz, Stephen Semancik
A major goal of materials research over the past two decades has been the development of high throughput methods for rapid discovery and optimization of processing routes. These methods rely on highly parallel materials synthesis to efficiently create

Frequency Comparison of Two High-Accuracy Al+ Optical Clocks

February 17, 2010
Author(s)
Chin-Wen Chou, David Hume, J.C. Koelemeij, David J. Wineland, Till P. Rosenband
We have constructed an optical clock with a fractional frequency inaccuracy of 8.6e-18, based on quantum logic spectroscopy of an Al+ ion. A simultaneously trapped Mg+ ion serves to sympathetically laser-cool the Al+ ion and detect its quantum state. The

Proceedings of the 2009 Workshop on Innovative Fire Protection

February 17, 2010
Author(s)
Anthony P. Hamins, Francine K. Amon, Jason D. Averill, Nelson P. Bryner, David T. Butry, Rick D. Davis, Richard G. Gann, Jeffrey W. Gilman, Samuel L. Manzello, Randall J. McDermott, William E. Mell, Nathan D. Marsh
The Innovative Fire Protection Workshop was held at the National Institute of Standards and Technology (NIST) on June 4 and 5, 2009. The 70 participants represented a broad range of stakeholder perspectives, including various non-profit, academic, industry
Displaying 27176 - 27200 of 73830
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