Economical and technical aspects of advanced PD diagnostics to support condition based maintenance of HV assets

2003 ◽  
Author(s):  
J.J. Smit ◽  
E. Gulski ◽  
F.J. Wester
Keyword(s):  
Condition Based Maintenance ◽  
Support Condition ◽  
Technical Aspects

Utilising Advanced Digital Technologies to Provide Automated Drilling Riser Fatigue Tracking to Support Condition Based Maintenance

2020 ◽  
Author(s):  
Paul Bohan ◽  
Donogh Lang ◽  
Dara Williams
Keyword(s):  
State Of The Art ◽  
Tracking System ◽  
Digital Technologies ◽  
Element Model ◽  
Condition Based Maintenance ◽  
Support Condition ◽  
Actual Usage ◽  
Inspection And Maintenance ◽  
Traditional Industry

Abstract The traditional industry approach to drilling riser joint inspection and maintenance has centered on recertification of riser joints at fixed five-yearly intervals. There are significant potential efficiencies to be gained from moving to a condition-based maintenance regime where inspection intervals are determined based on the actual usage of the riser joint. One of the critical factors driving the requirement for inspection is the fatigue damage sustained by the riser joint during use. This paper describes a unique drilling riser joint fatigue tracking system that uses the latest digital technologies, advanced automation processes and a state-of-the-art finite element model of the drilling riser to provide an accurate and efficient solution to the challenge of long-term riser joint fatigue tracking. The architecture and operation of the system is described in detail and the application of a fracture mechanics-based approach to fatigue calculation versus the traditional S-N curve-based approach is discussed.

Music and neuroimaging: Technical aspects

2003 ◽  
Author(s):  
Julian Paul Keenan ◽  
Jennifer Romanowski ◽  
William Chistiana ◽  
Gottfried Schlaug
Keyword(s):  
Technical Aspects

Clinical Application and Results of the Assessment of Coronary Blood Flow by the Regional Precordial Xenon Residue Detection Technique

1978 ◽  
Vol 17 (04) ◽  
pp. 161-171
Author(s):  
H.-J. Engel ◽  
H. Hundeshagen ◽  
P. R. Lichtlen
Keyword(s):  
Wall Motion ◽  
High Flow ◽  
Detection Technique ◽  
Fatty Tissue ◽  
Technical Aspects ◽  
Residue Detection ◽  
High Affinity ◽  
Artery Disease ◽  
The Right ◽  
Drug Interventions

Methodological and technical aspects as well as application and results of the precordial Xenon-residue-detection technique are critically reviewed. The results concern mainly normal flow in various regions of the heart esp. in the free wall of the right and left ventricle, poststenotic flow in patients with coronary artery disease in relation to the degree of proximal nar-rowings as well as wall motion of the corresponding LV segment, bypassgraft flow and flow after drug interventions esp. nitrates, betablockers, the calcium-antagonist Nifedipine and the coronary dilator Dipyridamole. In spite of its serious limitations (high affinity of Xenon for fatty tissue, geometrical problems in the assessment of flow and its relation to anatomy, gas exchange in situations of high flow etc.), the technique is found to be a usefull investigatory tool. Due to its technical display and the related high costs routine application is, however, prohibitive.

Coronary Angiography with Multidetector row Computed Tomography: Part I - Technical Aspects

2004 ◽  
Vol 51 (4) ◽  
pp. 401
Author(s):  
Dong Hun Kim ◽  
Sang Il Choi ◽  
Kyung Won Lee ◽  
Sung Kwon Kang ◽  
Seong Hoon Choi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Coronary Angiography ◽  
Multidetector Row Computed Tomography ◽  
Technical Aspects ◽  
Multidetector Row
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