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Now showing items 351-360 of 460
Tests of a diamond field-assisted positron moderator
(
Elsevier
, 2002 , Conference Paper)
Diagnostic studies have been performed on a 70 μm thick diamond film with a view to its development as a possible field-assisted moderator (FAM) for slow positron emission. The film was coated on one side with a 200 nm ...
Re-emission of slow positrons from tungsten at elevated temperatures
(
Elsevier
, 2002 , Conference Paper)
A series of measurements have been made on the dependence of the intensity and energy spectrum of slow positrons re-emitted from polycrystalline tungsten foil held at temperatures of up to 500 °C. Irrespective of target ...
Microstructure of heat-treated steel probed by positron annihilation
(2001 , Conference Paper)
Positron annihilation lifetime technique has been applied to study the microstructure change in steel after heat treatment. For this purpose, the specimens are heat treated in various manners; normalizing, annealing, ...
Thermalization times of positrons in molecular gases
(2000 , Article)
The time that a particle takes to reach thermal equilibrium in gas is a gross measure of the efficiency with which such particle can exchange its kinetic energy with the medium. The time taken for positrons to reach thermal ...
Three-body effects in the annihilation of positrons on molecules
(
APS
, 2002 , Article)
The three body effects in the annihilation of positrons on molecules were discussed. The positron annihilation in ethylene gas at room temperature and at densities below one amagat, showed that the mean free positron ...
DPSM technique for ultrasonic field modelling near fluid–solid interface
(
Elsevier
, 2007 , Article)
Distributed point source method (DPSM) is gradually gaining popularity in the field of non-destructive evaluation (NDE). DPSM is a semi-analytical technique that can be used to calculate the ultrasonic fields produced by ...
Applications of virtual construction environments in improving construction site safety
(
10th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2005
, 2005 , Conference Paper)
The complex nature of construction site safety during construction is a major issue to be considered. Among the top reasons affecting the safety of the construction site is the available workplace and the surrounding ...
Construction safety
(2006 , Book chapter)
N/A
Baseline formation for damage diagnosis in a turbine blade
(
Aalborg University
, 2005 , Conference Paper)
In the absence of a baseline for the pre-damaged structures, an attempt is made to create one, analytically, using dimensional analysis and physically using stereolithography. First, a preliminary diagnosis check is performed ...
Flow induced vibrations of pressure let-down station in QATARGAS
(2006 , Conference Paper)
The use of the pipes to transfer oil and gases from production to export places is a common application in oil and gas industries. The safety and stability of the pipelines are crucial to prevent human and equipment losses. ...