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Displaying 39501 - 39525 of 74223

Phase-Field Modeling for Eutectic Solidification

April 1, 2004
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
A diffuse interface (phase field) model for a simple electrochemical system is developed. We describe the minimal set of components needed to model an electrochemical interface and present a Lagrangian derivation of te governing equations. With a simple

Phase-Field Models for Eutectic Solidification

April 1, 2004
Author(s)
D J. Lewis, T Pusztai, L Granasy, James A. Warren, William J. Boettinger
This article discusses two methods for modeling eutectic solidification using the phase-field approach. First, the multi-phase field model is used to study the three-dimensional morphological evolution of binary eutectics. Performing the calculations in

Process Control and Logistics Management for Mass Customization Manufacturing

April 1, 2004
Author(s)
Guixiu Qiao, R F. Lu, Charles R. McLean
The emphasis on increasing product variety and individualization has created a strong demand for a new strategy of Mass Customization Manufacturing (MCM). A competitive and flexible manufacturing system must be developed to respond to small batches of

Radio-Frequency Glow Discharge Spectrometry A Critical Review

April 1, 2004
Author(s)
Michael R. Winchester, R Payling
This paper presents a critical review of analytical radio frequency glow discharge spectrometry (rf-GDS). The historical foundations of rf-GDS are described, and current knowledge of the fundamental physics of analytical rf glow discharges is discussed

Role of Empirical Studies Understanding and Supporting Engineering Design

April 1, 2004
Author(s)
Eswaran Subrahmanian, Ram D. Sriram, Paulien Herder, Henri Christiaans, Ralph Schneider
Study of design and norms for designing dates back 2000 years when Vitruvious first wrote his book on architectural design and prescribed what a designer ought to know and how he/she ought to behave. The perceived need to organize and systematize design

Rotational Spectra of the Diastereomers of Soman

April 1, 2004
Author(s)
R D. Suenram, R S. DaBell, Angela R. Hight Walker, D J. Lavrich, David F. Plusquellic, M W. Ellzy, J M. Lochner, L Cash, J O. Jensen, A C. Samuels
The pure rotational spectrum of the nerve agent Soman has been recorded and assigned using a pulsed molecular beam Fourier transform microwave spectrometer. The spectrum consists of transitions from two different isomers that are likely the [SS] (or [RR])

SCC Evolution of Formwork Hydraulic Pressure and Rheological Properties

April 1, 2004
Author(s)
S Amziane, Chiara C. Ferraris
An experimental investigation was performed to determine the hydraulic pressure variation of cementitious based materials (cement paste, concrete, SCC, etc.) during the plastic phase. A method based on measurements of both total lateral pressure and

Solid-Liquid Equilibrium for Non-Hydrostatic Stress

April 1, 2004
Author(s)
R F. Sekerka, John W. Cahn
We examine Gibbs' conditions for equilibrium of a non-hydrostatically stressed single component solid in equilibrium across one of its faces with a pure liquid at pressure p(superscriptF). We show that the equilibrium melting temperature T(subscriptN) for

Source Strengths of Ultrafine and Fine Particles Due to Cooking With a Gas Stove

April 1, 2004
Author(s)
L A. Wallace, Steven Emmerich, Cynthia H. Reed
Cooking, particularly frying, is an important source of particles indoors. Few studies have measured a full range of particle sizes produced during cooking. In this study, particles in 124 size bins from 0.01 mm to 2.5 mm were measured continuously over

Stability of Voids Formed in Cavities at Liquid-Solid Interfaces

April 1, 2004
Author(s)
Jeffrey W. Bullard
A thermodynamic model is developed of the free energy of gas-filled voids formed within cavities on solid surfaces covered by a liquid. Capillary effects are assumed to be the only important contributions to the free energy, and expressions are derived for

Suppression of Cup-Burner Flames Using Carbon Dioxide in Microgravity

April 1, 2004
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
Carbon dioxide extinguishes flames through dilution process. The extinction characteristics of CO2 were previously studied using a cup-burner flame under normal-gravity conditions. As the diffusion flames behave differently in microgravity compared to

The Rich Transcription 2004 Spring Meeting Recognition Evaluation

April 1, 2004
Author(s)
John S. Garofolo, Christophe Laprun, Jonathan G. Fiscus
This paper presents the design and results of the Rich Transcription 2004 Spring Meeting Recognition Evaluation. The evaluation included both Speaker Segmentation (SPKR) and Speech-to-Text Transcription (STT) tasks. Three microphone conditions were

UML 2 Activity and Action Models, Part 5: Partitions

April 1, 2004
Author(s)
Conrad E. Bock
This is the fifth in a series introducing the activity model in the Unified Modeling Language, version 2 (UML 2), and how it integrates with the action model. The first article gives an overview of activities and actions, while the next three cover actions

Unusual Expansion and Contraction in Ultrathin Glassy Polycarbonate Films

April 1, 2004
Author(s)
Christopher L. Soles, Jack F. Douglas, Ronald L. Jones, Wen-Li Wu
The thermal expansion behavior and glass transitions of poly(styrene) (PS) and poly(methyl methacrylate) (PMMA) are extensively studied in the thin film geometry. Both PS and PMMA are similar in that they possess very low entanglement densities. In this
Displaying 39501 - 39525 of 74223
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