An Investigation of the Adoption of Online Game Technologies in Indonesia

This study examines influences on an individual’s intentions to use online game technologies. Data was collected by the questionnaire from a sample of 895 individuals of age 12 – 26 years in Indonesia. A theoretical model extending the Unified Theory of Acceptance and Use of Technology included causal effects on intentions as well as moderating effects due to the individual’s gender, age, and experience. The model was analyzed using structural equation modeling techniques and the results confirmed several findings from previous studies respected especially with the positive effects of enjoyment, ease of use, and the availability of infrastructure on the individual’s intentions. New findings showed that gender, age, and experience moderated the effects on the individual’s intention due to social influences, feelings of involvement, and perceptions of personal attainments, respectively. Moreover, new findings emerged for differences and similarities in the significant effects in the theoretical model among the groups defined within the scales of gender, age, and experience. Keywords Indonesia, Moderating Effect, Online Game, Technology Adoption, UTAUT Mode

Drug response at electropharmacologic study in patients with ventricular tachyarrhythmias: The importance of ventricular refractoriness

AbstractThe clinical and electrophysiologic predictors of successful antiarrhythmic drug therapy for patients with inducible ventricular tachycardia were evaluated in 59 consecutive patients undergoing serial electropharmacologic trials. Structural heart disease was less frequently present in patients for whom effective therapy was found (p < 0.05). The presence of coronary artery disease and a history of prior myocardial infarction were significantly more frequently present in patients for whom antiarrhythmic drug therapy could not be found (p < 0.05). The corrected QT interval and ventricular effective refractory period measured at a pacing cycle length of 400 ms were significantly shorter in responders compared with nonresponders (QT interval 428 ± 52 versus 460 ± 59 ms; ventricular effective refractory period 237 ± 28 versus 254 ± 24 ms; (p < 0.05). In addition, the interelectrogram coupling interval of the ventricular extrastimulus initiating ventricular tachycardia was significantly shorter in responders compared with nonresponders (223 ± 37 versus 251 ± 33 ms; p = 0.003).Logistic regression analysis identified a short ventricular inter-electrogram coupling interval (p < 0.01) end absence of prior myocardial infarction (p < 0.05) as the only independent predictors of antiarrhythmic drug suppression of the induction of ventricular tachycardia. Greater drug-induced increments in the ventricular effective and functional refractory periods were observed in responders than in nonresponders as was the shortest ventricular interelectrogram coupling interval.Thus, baseline electrophysiologic measurements identify patients with inducible ventricular tachycardia who are likely to respond to antiarrhythmic drag therapy. Furthermore, these patients demonstrate greater drug-induced electrophysiologic changes