درخت حوزه‌های تخصصی

A few second prior to an expected event, a systematic decrease in heart rate (HR), reflecting attentional processing is observed. Arousal variations however, restrain the interpretation of this decrement. The present study, aimed to investigate vigilance and arousal effects during a skilled performance separately, using separate measures for the two psychological states. HR and skin conductance level (SCL) were measured as an index of vigilance and arousal from 18 elite and 19 novices during 30 self-paced, self-initiated basketball free throws. Values of HR and SCL were calculated at half-second intervals from 10 s before to 10 s after each shot and were analyzed using repeated measures ANOVA. This helped to compare pre-shot and post-shot patterns of physiological changes separately in elites and novices. In elites, there was a slow reduction in SCL prior to, and a rebound increase immediately following the shot. These were smaller for novices. Similar findings were observed when good shots were compared to bad ones. The value for rebound after good shots reached 8 times more than the pre-shot value. A sharp increase in HR, up to 40 bpm was found 4 second before the shot, which returned to pre-shot value after 2s for elites; this did not return in novices. HR in bad shots was higher than good shots. Results indicate that the SCL reflect arousal level at the time of task and its pattern of variations reflects skill level. Although, HR was lower in good shots, the pattern of variation in HR reflected physical requirements of the task. Results were compared to previous findings and discussed in relation to the hypotheses explaining arousal and vigilance in human behavioral performance.

On 15 February 2012, two Indian nationals aboard the St. Antony, an Indian fishing ship, were killed allegedly as a result of gunshot wounds following a confrontation with the Enrica Lexie, an Italian merchant ship, in international waters, off the Indian coast. The nature of the confrontation has been in contention. Enrica Lexie was traveling from Singapore to Egypt accompanied by six Italian navy marines. Enrica Lexie began firing at India's Exclusive Economic Zone because they thought pirate boats attacked them. Indian Navy detained the Enrica Lexie and two Italian navy Marines were arrested on charges of murder of two Indian fishermen. This incident caused the dispute between India and Italy over criminal jurisdiction, functional immunity of Italian navy marines, and the practice of arming merchant ships. They refer this dispute to arbitration and finally, Tribunal issued its award. This paper via the descriptive-analytical method, exploring existing documents, conventions, and customary international law shows that criminal jurisdiction over Italian merchant ships at EEZ belongs to the flag state. Most countries permit and even force to arm their flag merchant ships to fight against pirates, so this practice becomes a rule of customary international law. As a result, actions of these Italian marines are attributed to Italy as a governmental act, and state officials are entitled, in principle, to functional immunity from foreign jurisdiction regarding their ‘official’ acts, i.e., when acting in their official capacity.