scholarly journals Solute effects on interfacial dislocation emission in nanomaterials: Nucleation site competition and neutralization

2018 ◽  
Vol 154 ◽  
pp. 12-15 ◽  
Author(s):  
Valery Borovikov ◽  
Mikhail I. Mendelev ◽  
Alexander H. King
Keyword(s):  
Nucleation Site ◽  
Dislocation Emission ◽  
Interfacial Dislocation ◽  
Site Competition

The effect of cracks on the superconducting transport current in thin films: The analogy with two-dimensional elasticity and plasticity

1993 ◽  
Vol 8 (7) ◽  
pp. 1515-1532 ◽  
Author(s):  
David R. Clarke ◽  
Marc DeGraef
Keyword(s):  
Crack Tip ◽  
Nucleation Site ◽  
Two Dimensions ◽  
Homogeneous Material ◽  
Pinning Force ◽  
Dislocation Emission ◽  
Applied Current ◽  
Vortex Zone ◽  
Dislocation Models ◽  
Superconducting Vortices

Simulations of arrays of resistively shunted Josephson junctions containing a crack of uncoupled junctions indicate that the crack can distort the supercurrent flow and provide a nucleation site at the crack tip for the formation of superconducting vortices at applied currents below the critical current of the homogeneous material. An analogy is established between the supercurrent distribution in two dimensions and the stress field distribution around the crack for antiplane mechanical loading. The analogy is used to show that the supercurrent distribution can be described analytically in terms of a Westergaard function used in elasticity theory. In addition, using a correspondence between the forces acting on a vortex and a crystal dislocation, models for screw dislocation emission from a crack tip are transposed to describe vortex emission from a crack tip. These lead to predictions for the pinning force required to prevent dissipation by vortex emission from the crack tip, as well as for the size of a vortex zone ahead of the crack for different values of the ratio of the applied current to the pinning force.

Commercial Development at Rural and Small-Town Interstate Exits

1998 ◽  
Vol 1649 (1) ◽  
pp. 95-104 ◽  
Author(s):  
David T. Hartgen ◽  
Ji Youn Kim
Keyword(s):  
Fast Food ◽  
Small Town ◽  
Local Market ◽  
Network Access ◽  
Commercial Development ◽  
Gas Stations ◽  
Trade Area ◽  
Fast Food Restaurants ◽  
Regression Techniques ◽  
Site Competition

Commercial development at 63 rural and small-town Interstate exits is quantified and related to local market wealth, size, geography, access, traffic, site competition, and other development. Five development types (gas stations, convenience stores, fast food restaurants, sit-down restaurants, and motels) are studied. The geographic information system TransCAD 3.0 is used to determine network access and local trade area characteristics. Models are then estimated for each development type using classification and regression techniques separately and in combination. Model estimates are then compared with actual development. Results show that the relationships are complex, often nonlinear; and show high correlation between development types. The findings should be useful for planning exit land use, coordinating market assessments, determining the value of land, and assessing sites for business placement.

Interfacial dislocation arrays in twin boundaries of deformed titanium

1994 ◽  
Vol 30 (10) ◽  
pp. 1311-1315 ◽  
Author(s):  
Th. Kehagias ◽  
Ph. Komninou ◽  
G.P. Dimitrakopulos ◽  
J.G. Antonopoulos ◽  
Th. Karakostas
Keyword(s):  
Twin Boundaries ◽  
Interfacial Dislocation ◽  
Dislocation Arrays

The study of nucleation site interactions on the mixed wettability rough surface

2021 ◽  
Vol 126 ◽  
pp. 105372
Author(s):  
Shakeel Ahmad ◽  
Huaqiang Liu ◽  
Yu Shi ◽  
Jingtan Chen ◽  
Jiyun Zhao
Keyword(s):  
Rough Surface ◽  
Nucleation Site ◽  
Mixed Wettability

Proton Induced Structuring of a Photostructurable Glass

2002 ◽  
Vol 739 ◽  
Author(s):  
Meg Abraham ◽  
Inmaculada Gomez-Morilla ◽  
Mike Marsh ◽  
Geoff Grime
Keyword(s):  
Three Dimensional ◽  
Particle Beam ◽  
Nucleation Site ◽  
Buried Structures ◽  
Corning Glass ◽  
Nucleation Sites ◽  
Initial Nucleation ◽  
Similar Product ◽  
Photon Process ◽  
Meta Silicate

ABSTRACTThe use of photons to create intricate three-dimensional and buried structures [1] in photo-structurable glass has been well demonstrated at several institutions [2]. In these instances the glass used whether it be Foturan™, made by the Schott Group or a similar product made by Corning Glass, forms a silver nucleation sites on exposure to intense UV laser light via a two-photon process. Subsequent annealing causes a localized crystal growth to form a meta-silicate phase which can be etched in dilute hydrofluoric acid at rates of 20 to 50 times that of the unprocessed glass. The same formulation of glass can be “exposed” using a particle beam to create the nucleation site. In the case of particle beam exposure, experiments have shown that the mechanisms that cause this initial nucleation and eventual stochiometric transformation, after annealing, depend largely on the beam energy.

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