Search Results - subject:"Defect"

DISLOCATION AND DEFECT DENSITIES BY PAT IN 2024 AIRCRAFT MATERIAL USING TWO DIFFERENT ACTIVITY SOURCES

ABDEL-RAHMAN, M. A.; ABDALLAH, M. S.; BADAWI, EMAD A. - In: Surface Review and Letters (SRL) 12 (2005) 03, pp. 463-468

annihilation lifetime technique (PALT) measurements are used to study the behavior of defect concentration and dislocation density … lifetime after defect concentration became saturated. The mean lifetime and trapping rates for the samples deformed up to 36 …

Persistent link: https://www.econbiz.de/10005080524

A STUDY OF RECOVERY STAGES IN SOME PLASTICALLY DEFORMED ALUMINUM ALLOYS BY POSITRON LIFETIME SPECTROSCOPY

ABDEL-RAHMAN, M. A.; ABDALLAH, M. S.; BADAWI, EMAD A. - In: Surface Review and Letters (SRL) 12 (2005) 02, pp. 203-207

Positron annihilation was performed to study the isochronal annealing of wrought (2024, 7075) and casting (AlSi11.35Mg0.23, AlSi10.9Mg0.17Sr0.06) aluminum alloys in the temperature range from room temperature to 773 K after they had been deformed at room temperature with 25% deformation. Two...

Persistent link: https://www.econbiz.de/10005080624

A neural network approach to assessing building facade maintainability in the tropics

Chew, M. Y. L.; Silva, Nayanthara De; Tan, S. S. - In: Construction Management and Economics 22 (2004) 6, pp. 581-594

A model was developed to assess the maintainability of facade using neural network techniques. Inputs were derived from comprehensive studies of 570 tall buildings (more than 12 stories) through detailed field evaluation and interviews with professionals in the whole building delivery process....

Persistent link: https://www.econbiz.de/10005445648

Hedgehog–antihedgehog pair annihilation to a static soliton

Cladis, P.E.; Brand, Helmut R. - In: Physica A: Statistical Mechanics and its Applications 326 (2003) 3, pp. 322-332

defect in nematic liquid crystals can be asymptotically free. For larger external perturbations, we find that the …

Persistent link: https://www.econbiz.de/10011062757

An exactly soluble model for distortive structural phase transitions in a crystal with a single defect

Braeter, H; Michel, D - In: Physica A: Statistical Mechanics and its Applications 321 (2003) 3, pp. 543-564

transition of a crystal with a single defect. The defect can be incorporated in the vibrations of all other particles only if the … attractive single-site potential of the defect is less than a certain critical value. No local distortions can appear above the …-site potential, the defect does not participate in the motions of the host. But a local mode may appear above TC which only condenses …

Persistent link: https://www.econbiz.de/10010874136

Using expert systems in industrial production management

Dima, Ioan Constantin; Dura, Codruţa - In: Annals of the University of Petrosani, Economics 2 (2002), pp. 23-33

The expert system aiming the moulded pieces production management improving is designed to assist maintenance and operation personal in the process of diagnosis of complex defects which may appear during the technological process, but the system must also contribute to technical measurements...

Persistent link: https://www.econbiz.de/10005403582

Constrained geometries in soap froth dynamics

Ruskin, H.J; Feng, Y - In: Physica A: Statistical Mechanics and its Applications 314 (2002) 1, pp. 362-369

defect ring surrounding a central inclusion in a uniform froth, for different number of defects and ring radius. This … and non-equilibrium processes in general). It appears that defect location and pattern of inclusion in the virtual phase …

Persistent link: https://www.econbiz.de/10010872610

Aharonov-Bohm effect in one-channel weakly disordered rings

Nakhmedov, E.P.; Feldmann, H.; Oppermann, R. - In: The European Physical Journal B - Condensed Matter and … 16 (2000) 3, pp. 515-520

Persistent link: https://www.econbiz.de/10009325054

Density functional study of the ternary Si<Subscript>2</Subscript>CN<Subscript>4</Subscript> and C<Subscript>Si</Subscript>: Si<Subscript>3</Subscript>N<Subscript>4</Subscript> compounds

Amadon, B.; Finocchi, F. - In: The European Physical Journal B - Condensed Matter and … 11 (1999) 2, pp. 207-215

</Subscript>N<Subscript>4</Subscript>, at low defect concentrations, either for scattered defect distributions or neighboring C …

Persistent link: https://www.econbiz.de/10010992591

Density functional study of the ternary Si<Subscript>2</Subscript>CN<Subscript>4</Subscript> and C<Subscript>Si</Subscript>: Si<Subscript>3</Subscript>N<Subscript>4</Subscript> compounds

Amadon, B.; Finocchi, F. - In: The European Physical Journal B - Condensed Matter and … 11 (1999) 2, pp. 207-215

Persistent link: https://www.econbiz.de/10009325105