No abstract

In an initiative to reveal the property of welded joint, investigation and assessment of the welding parameters in friction stir spot welding (FSSW) was carried out. In this study, the AA5052-H112 sheets with 2mm thickness was welded using cylindrical tool pin profile under different combinations of main process parameters i.e. spindle speed, tool depth, and dwell time. The fatigue test under cyclical load condition was performed to investigate the dynamic behavior of the welded joint. Failure mode analysis on the fracture of the weld joint after fatigue test was took also consideration. Finally, results from the test were evaluated using analysis of variance (ANOVA) to deter-mine statistically significant factors and associated percentage contribution together with the generation of main effects plots. From ANOVA results, dwell time had the highest influence on fatigue load with a PCR of 52.8%, followed by the spindle speed 37.1%, and then tool depth 6%.

The gap between organizational demands on employee competence and actual employee competence gives new challenges to the education industry to continually increase the readiness of its graduates. Teaching models are developed to produce graduates that are in accordance to the demands of the global competition. However in practice, educational staff often use the same model to all of their students (Blau, 2012), setting aside the importance of congruent concept in an effective pedagogical process (Akin-Little & Little, 2009). The current study is aimed to test the learning style of university engineering students based on the Felder-Silverman model and its role on academic performance. Results showed that engineering students in this study have the following learning style preferences: Active–Sensing–Visual–Global, which can be used as a base to design teaching methods, which will hopefully be able to provide better support to students‟ academic performance. Furthermore, a significant relationship between learning style for Active–Reflective dimension and academic performance was found, as indicated by their GPA.