When load is applied to fcc nanograins, leading partial dislocations nucleate at grain boundary steps and propagate into the grain, leaving stacking faults behind. The extent to which these faults expand before a trailing partial is emitted generally does not equal the equilibrium separation distance of the corresponding full dislocation. Here we use a density functional theory – phase field di...

Alloying base contacts directly through an InGaP emitter layer provides excellent passivation of the GaAs base in HBTs. Processes which utilize this ledge formation scheme and a self-aligned, wet-chemical basecollector etch can suffer degradation in DC performance. Layouts with a hexagonal emitter can circumvent any DC performance degradation because the base electrode can be used as the etch m...

A growing chorus of practitioners sing the praises of simulation-based training. As pinched budgets drive managers to scrutinize the return on their training investments, the question is, are simulationbased methods more effective than conventional training methods, such as classroom-based and traditional eLearning? That is, do they result in greater retention, deeper understanding, higher leve...

SICS The concept of spatial cognition or spatial ability captures several quite different cognitive functions. One way of cluster spatial tests, according to certain aspects of the spatial ability, will be presented. Difficulties in measuring or capturing different aspects of the spatial ability will also be discussed. Further this review describes issues concerning the acquisition and represen...

Background: The technical quality of root canal treatment (RCT) may impact on the outcome. education received during undergraduate school be linked to provided in general dental practice.
 Objective: To compare RCT where rotary or manual step-back preparatory technique was employed an clinic Turkey. Additionally, present study aimed radiographically commonly seen complications both instrum...

On the base of studying multistage instrumental toothed mechanisms provided earlier computer-aided design of multistage gear drives, optimized by criterion of minimum volume is considered. The sowfware’s CAD-systems including computer programs for multistage gear drives of ledge wise, coaxial and orbital arrangements are developed. Different schemes of arrangement are analyzed and results of op...