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Mental workload of the VTS operators by utilising heart rate

Kum S., Furusho M., Duru O., Satir T.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2007

Vol. 1, no. 2

145--151

This study clarifies the mental workload of VTS Operator; by understanding their characteristics during carrying out their task, with a physiological index. The objective is to determine VTS Operators’ mind stress that might trigger any human error based on their mental workload during their watches. For this purpose, Heart Rate Monitor (HRM) is utilized as physiological index. The VTS Operators fitted the HRM and all of them have experience as a Master Mariner. During the all experiments, their heart rates and behaviours were recorded on the Event Record Form based on the time scale. After getting the heart rate variability, it is matched with the events, and then Operators’ behaviour is understood as the mental workload due to such kinds of events. Furthermore, these workloads include the Operators’ mind stress and their decisions under these circumstances. This study provides the fundamental information for understanding the VTS Operators’ characteristics.

Can Nurses Be Employed in 12-Hour Shift Systems?

Makowiec-Dąbrowska T., Krawczyk-Adamus P., Sprusińska E., Jóźwiak Z. W.

International Journal of Occupational Safety and Ergonomics

2000

Vol. 6, No. 3

393--403

Nurses are often obliged to work in a 12-hr shift work system. We have decided to check whether such a working system constitutes an excessive load for nurses. On the basis of a questionnaire survey among nurses working in an 8-hr daytime shift system (169 nurses) and in a 12-hr shift (536 nurses), the amount of physical workload, work stress, and after-work activities were compared. Data analysis has shown that a 12-hr shift system is characterized by less significant physical workload but greater mental load. The nurses working in a 2-shift system were more tired after work, but they could spend more time on leisure activities and do housework. The data suggest that there are no significant contraindications for nurses to work in a 2-shift system.