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Displaying 43476 - 43500 of 73893

On the Gibbs Adsorption Equation and Diffuse Interface Models

May 1, 2002
Author(s)
Geoffrey B. McFadden, A A. Wheeler
In this paper we discuss some applications of the classical Gibbs adsorption equations to specific diffuse interface models that are based on conserved and non-conserved order parameters. Such models are natural examples of the general methodology

Performance and Characterization of Building Integrated Photovoltaic Panels

May 1, 2002
Author(s)
Arthur H. Fanney, Brian P. Dougherty, Mark W. Davis
Buildings consume more than two-thirds of the electricity in the United States. The incorporation of photovoltaics into the buildings, referred to as building integrated photovoltaics (BIPV), offers an aesthetically pleasing means of displacing centrally

Phase Field Modeling Applied to the Double Layer

May 1, 2002
Author(s)
Jonathan E. Guyer, William J. Boettinger, James A. Warren, Geoffrey B. McFadden
We present the first application of phase field modeling to electrochemistry. A free energy functional that includes the electrostatic effect of charged particles leads to rich interactions between concentration, electrostatic potential, and phase

Preliminary Report on the Biocompatibility of a Moldable, Resorbable, Composite Bone Graft Consisting of Calcium Phosphate Cement and Poly (Lactide-Co-Glycolide) Microspheres

May 1, 2002
Author(s)
Carl Simon Jr., C A. Khatri, Scott Wight, Francis W. Wang
We have assessed the biocompatibility of a new composite bone graft consisting of calcium phosphate cement (CPC) and poly(lactide-co-glycolide) (PLGA) microspheres (175-350 ?m) using cell culture techniques. CPC powder is mixed with PLGA microspheres and

Probing Surface and Bulk Chemistry in Resist Films Using Near Edge X-Ray Absorption Fine Structure

May 1, 2002
Author(s)
Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Ronald L. Jones, Eric K. Lin, Christopher Soles, Wen-Li Wu, Daniel A. Fischer, S Sambasivan, D L. Goldfarb, M Angelopoulos
Control of the shape, critical dimension (CD), and roughness is critical for the fabrication of sub 100 nm features, where the CD and roughness budget are approaching the molecular dimension of the resist polymers. One focus of our research is identifying

Reduction of Cobalt and Iron Corroles and Catalyzed Reduction of CO 2

May 1, 2002
Author(s)
J Grodkowski, Pedatsur Neta, E Fujita, A Mahammed, L Simkhovich, Z Gross
The role of cobalt and iron corroles in catalytic CO 2 reduction has been studied. Chemical, electrochemical, and photochemical reductions of the stable metal corroles Ph 3PCo III(tpfc) (tpfc = 5,10,15-tris(pentafluorophenyl)corrole), ClFe^IV^(tpfc), and

Regenerative Stability Analysis of Highly Interrupted Machining

May 1, 2002
Author(s)
Matthew A. Davies, Jon R. Pratt, Brian S. Dutterer, Timothy J. Burns
We discuss theoretical and experimental work that supports the use of very low radia immersion in the high-speed milling of difficult-to-machine materials, such as titanium alloys. Our theory is based upon modeling the cutting process by a kicked harmonic

RNA and RNA-Protein Complexes as Targets for Therapeutic Intervention

May 1, 2002
Author(s)
E S. DeJong, B. Luy, John Marino
Today, the majority of pharmaceuticals developed to treat cancers and viral/bacterial infections target cellular, bacterial or viral proteins known to be associated with a given pathology. Although proteins are the focus of most current drug discovery

Shift in Polymer Blend Phase-Separation Temperature in Shear Flow

May 1, 2002
Author(s)
Jack F. Douglas
Recent experimentalstudiesof polymer blendsin simple shear flow have indicated large *Shih of the apparent phase-separation temperature. These shifts are examined within the context of a nonequilibrium hydrodynamic theory of phase separation developed by

Spin Polarization of Injected Electrons

May 1, 2002
Author(s)
William F. Egelhoff Jr., Mark D. Stiles, David P. Pappas, Daniel T. Pierce, J M. Byers, J M. Johnson, B T. Jonker, S F. Alvarado, J F. Gregg, J A. Bland, R Buhrman
A recent paper in Science made the claim of 92% polarization for the injection spin polarized electrons from a Ni scanning tunneling microscopy (STM) tip into GaAs(110). Actually they state their result as 92% efficiency for the injection of 100%

Spin-Glass and Random-Field Effects in Exchanged-Biased NiFe Film on a NiO Single-Crystal Substrate

May 1, 2002
Author(s)
A E P de Araujo, F L. Machado, A R. Rodrigues, A Azevedo, F M. de Aguiar, J R. de Almeida, S M. Rezende, William F. Egelhoff Jr.
SQUID magnetometry measurements on a ferromagnetic/antiferromagnetic sample made of a permalloy thin film sputtered on a thick NiO single-crystal substratre reveal remarkable irreversibilities in the magnetization (M) versus temperature (T) data. The field

Stability Prediction For Low Radial Immersion Milling

May 1, 2002
Author(s)
Matthew A. Davies, Jon R. Pratt, Brian S. Dutterer, Timothy J. Burns
Traditional regenerative stability theory predicts a set of optimally stable spindle speeds at integer fractions of the national frequency of the most flexible mode of the system. The assumptions of this theory become invalid for highly interrupted

Strain Measurements in Thermally-Loaded Circuit Boards Containing Embedded Resistors

May 1, 2002
Author(s)
Elizabeth S. Drexler, R C. Snogren, M C. Snogren, J J. Felten, P A. Green
Four specimens of embedded resistors were tested from room temperature to the processingtemperature (177 C) to compare deformations in the printed wiring board (PWB) using electron-beam moire. The specimens had different termination sizes and geometries

Structural Magnetic and Thermal Stability of IrMn Exchange Biased Layers

May 1, 2002
Author(s)
Chang H. Lee, J G. Jung, Robert D. McMichael, R A. Fry, Andrew P. Chen, William F. Egelhoff Jr., V S. Gornakov
The magnetic domain structure, magnetic properties and thermal stability of IrMn biased top spin valves containing Co and NiFe have been investigated. The magneto-optical indicator film (MOIF) pictures of NiFe biased IrMn spin valve showed the formation

Temperature Effects During Capillary Rheometry Testing

May 1, 2002
Author(s)
Anthony J. Bur, S C. Roth, H Lobo
A non-contact temperature monitoring technique based on fluorescence spectroscopy was used to measure the temperature of a polymer resin during capillary rheometry testing. Polyethylene and polycarbonate doped with a fluorescent dye, perylene, were used in
Displaying 43476 - 43500 of 73893
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