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Displaying 49001 - 49025 of 143775

Hyper-Ramsey spectroscopy of optical clock transitions

July 22, 2010
Author(s)
Christopher W. Oates, V. I. Yudin, A. V. Taichenachev, Zeb Barber, Nathan D. Lemke, Andrew D. Ludlow, U Sterr, Ch. Lisdat, F Riehle
We present nonstandard optical Ramsey schemes that use pulses individually tailored in duration, phase and frequency to cancel spurious frequency shifts related to the excitation itself. In particular, the field shifts and their uncertainties can be

Ontological Product Modeling for Collaborative Design

July 22, 2010
Author(s)
Conrad E. Bock, XuanFang Zha, Hyo-won Suh, Jae H. Lee
This paper shows how to combine ontological and model-based techniques in languages that facilitate collaborative design exploration. The proposed approach uses ontology to capture alternative designs and incremental refinements that meet requirements and

Statistics of Camera-Based Single-Particle Tracking

July 22, 2010
Author(s)
Andrew J. Berglund
Through analysis of digital images, camera-based single-particle tracking enables quantitative determination of transport properties of nanoparticles and molecules and provides nanoscale information about material properties such as viscosity and

Using Thermodynamics to Simulate Cement Paste Microstructure Development

July 22, 2010
Author(s)
Jeffrey W. Bullard, Barbara Lothenbach, Paul E. Stutzman, Kenneth A. Snyder
We couple equilibrium thermodynamic calculations to a 3D microstructure model to simulate microstructure development during hydration of portland cement paste. The model uses a collection of growth/dissolution rules to approximate a range of growth modes

Laser-produced MeV electrons and hard X-ray spectroscopic diagnostics

July 21, 2010
Author(s)
Lawrence T. Hudson, John F. Seely
A new spectroscopic technique for the measurement of the sizes of hard X-ray sources produced by the irradiation of solid-density targets by intense laser radiation is discussed. The technique is based on the source broadening of K shell spectral lines

Sigma Ballots

July 21, 2010
Author(s)
Stefan Popoveniuc, Andrew Regenscheid
We present Sigma ballots, a new type of ballot to be used in secure elections. Sigma ballots use the random order of candidates introduced by Pret a Voter, combined with the confirmation codes of Scantegrity II. These ballots can be produces by a DRE

A Risk-Uncertainty Formula Accounting for Uncertainties of Failure Probability and Consequence in a Nuclear Powerplant

July 20, 2010
Author(s)
Jeffrey T. Fong, Stephen R. Gosselin, Pedro V. Marcal, James J. Filliben, Nathanael A. Heckert, Robert E. Chapman
This paper is a continuation of a recent ASME Conference paper entitled "Design of a Python-Based Plug-in for Bench-marking Probabilistic Fracture Mechanics Computer Codes with Failure Event Data" (PVP2009-77974). In that paper, which was co-authored by
Displaying 49001 - 49025 of 143775
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