Sökning: "Defect"
Visar resultat 21 - 25 av 798 avhandlingar innehållade ordet Defect.
21. Calculations of defect related properties in semiconductors
Sammanfattning : Many of the most important and useful properties of crystalline materials, such as mechanical strength and electrical resistance, are determined by the presence of lattice defects and impurities. Well known examples are dislocations which control plastic flow and make metals ductile, and dopant atoms which control the extrinsic conduction in semiconductors and insulators. LÄS MER
22. Ultrasonic NDT in Defect Detection - Mathematical modelling
Sammanfattning : This thesis is concerned with the mathematical modelling of the ultrasonic nondestructive testing situation. The first part of the thesis treats a simplified model of an ultrasonic transducer and its implementation into a T-matrix method-based solution to a crack scattering problem. LÄS MER
23. Defect Prediction & Prevention In Automotive Software Development
Sammanfattning : .... LÄS MER
24. Defect-engineered (Ti,Al)N thin films
Sammanfattning : This thesis investigates the effect of point defects (nitrogen vacancies and interstitials) and multilayering ((Ti,Al)N/TiN) on the phase transformations in cathodic arc-evaporated cubic (Ti,Al)N thin films at elevated temperatures. Special attention is paid to the evolution of the beneficial spinodal decomposition into c-TiN and c-AlN, the detrimental formation of wurtzite AlN and the potential application as hard coating in cutting tools. LÄS MER
25. Children with Down syndrome - : an epidemiological study with special focus on congenital heart defects
Sammanfattning : To assess the impact of congenital malformations in Down syndrome (DS) on morbidity, mortality and outcome at birth, information on all children with DS born in the northern part of Sweden in 1973-80 (n=211) and 1995-98 (n=88) was collected. Most common were congenital heart defects (CHD), dominated by atrioventricular septal defects (AVSD). LÄS MER