This study explores the roles of commitment and delegation authority respectively as a mediator and moderator to evaluate the impact of motivation on employee performance. A survey conducted with 180 employees as participants at OTB (Burundi Tea Office) from 4 tea factories located at Ijenda, Teza, Tora and Rwegura helped to assess the effect motivation has on employees’ performance. The correlation and regression analysis in SPSS was supported to evaluate the hypotheses of this research. The results reveal that there is a positive significance correlation between motivation and performance of employees. The outcomes from regression analysis express that commitment and delegation authority as mediator and moderator respectively have an impact on the relationship between motivation and performance of employees.
Aims
The aim of this study is to design a computer model of the left atrium for investigating fibre-orientation-dependent microstructure such as stringy fibrosis.
Methods and results
We developed an approach for automatic construction of bilayer interconnected cable models from left atrial geometry and epi- and endocardial fibre orientation. The model consisted of two layers (epi- and endocardium) of longitudinal and transverse cables intertwined-like fabric threads, with a spatial discretization of 100 µm. Model validation was performed by comparison with cubic volumetric models in normal conditions. Then, diffuse (n = 2904), stringy (n = 3600), and mixed fibrosis patterns (n = 6840) were randomly generated by uncoupling longitudinal and transverse connections in the interconnected cable model. Fibrosis density was varied from 0% to 40% and mean stringy obstacle length from 0.1 to 2 mm. Total activation time, apparent anisotropy ratio, and local activation time jitter were computed during normal rhythm in each pattern. Non-linear regression formulas were identified for expressing measured propagation parameters as a function of fibrosis density and obstacle length (stringy and mixed patterns). Longer obstacles (even below tissue space constant) were independently associated with prolonged activation times, increased anisotropy, and local fluctuations in activation times. This effect was increased by endo-epicardial dissociation and mitigated when fibrosis was limited to the epicardium.
Conclusion
Interconnected cable models enable the study of microstructure in organ-size models despite limitations in the description of transmural structures.
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