December 2015
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12 Reads
The Japanese Journal of Ergonomics
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Publications (34)
June 2015
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119 Reads
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5 Citations
October 2014
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22 Reads
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2 Citations
Our goal is that salivary NO3- reveals mental workload of ship Navigators, and that we confirm new navigators can recognize and avoid the risky situations, where veteran navigators' mental workload builds up, by using salivary NO3- measurement device. Various physiological indices exist in all over the world, for example, heart rate variability (R-R interval), nasal temperature, and salivary amylase; these are exactly good indices but cannot show quick response on the spot and the trend like a moving average as well as salivary NO3-. We have to create the salivary NO3- measurement device to evaluate the mental workload of navigators using salivary NO3- by reason of nonexistence of the device. We have confirmed the response of the device to simulator training scenarios' events for new and veteran navigators. Based on R-R interval, this paper proposes that we prove salivary NO3- reveals a navigator's mental workload for navigational events in the simulator.
September 2014
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3 Reads
The Japanese Journal of Ergonomics
December 2013
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39 Reads
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6 Citations
International Journal of Intelligent Computing in Medical Sciences and Image Processing
The Evaluation of mental workload and performance usually depended on professionals, captain and pilot, who have a lot of experience on board. We are attempting to evaluate a ship navigator's mental workload using a physiological index. The physiological indices, heart rate variability (R-R interval), nasal temperature, and salivary amylase, are good indices for reading the mental workload in ship handling. In addition, we have found a possibility of salivary as a good index for evaluating the navigator's mental workload. The salivary is expected to have a specific characteristic to represent quick response on the spot and the trend like a moving average. We confirmed the response of students for simulator-based training, and we were carried out the experiments for professionals on a real ship. This research, to evaluate the mental workload of navigators using salivary , is first challenge worldwide. This paper proposes that the salivary is effective to measure navigators' mental workload for ship handling, and our devise is enough for the navigational research.
October 2013
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9 Reads
As the ultimate objective of maritime transportation - logistics is only achieved by completing safe and sound voyages, it has stimulated the study of the interaction between human and ship borne complex. Using a ship bridge simulator with a movable platform to study various crucial factors may have considerate affects on the performance of operator on board. Heart Rate Variability (HRV) - one of the most credible and objective indices in the study on human behavior - performance is utilized as the main parameter. The interaction between human and machine system in such a unique environment with nonstop motion-induced element can be evaluated satisfactory.
October 2013
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8 Reads
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1 Citation
October 2013
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47 Reads
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2 Citations
An officer of the watch (OOW) is a qualified person with the knowledge and capabilities required to safely navigate a ship. However, many collisions occur that are caused by human errors in navigation. Eighty-four percent of collision accidents are caused by inadequate lookout. It is estimated that such accidents can be prevented if the OOW performs fully to his or her knowledge and capabilities. Many factors can reduce the OOW's reliability, so it can be difficult to specify the cause of an accident. If the cause of an accident can be specified, efficient measures can be taken. This study utilizes a human reliability analysis method to analyze marine accidents. The cognitive reliability and error analysis method (CREAM) divides background factors into nine common performance conditions (CPCs). However, the manner in which CREAM is used in the nuclear industry is not applicable to the maritime domain since the working conditions are very different. To facilitate using CREAM to analyze marine accidents, we sought advice from specialists about redefining the CPCs and their descriptions. We then adapted the dependencies between the CPCs to marine accidents based on a questionnaire survey administered to OOWs. This paper reports the results of the questionnaire survey. In addition, we discuss the dependencies between the CPCs adapted for marine accident analysis. These results confirm the essence and character of the maritime industry.
September 2013
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9 Reads
The Proceedings of Mechanical Engineering Congress Japan
There are a lot of marine accidents caused by human factors.The experiment using bridge simulator is effective for analysis of the human factor.However,the analytical approach for the navigational behavior by the experiment with bridge simulator has not been established yet.The purpose of this paper is to propose an analytical approach by introducing concepts of Probabilistic Risk Assessment(PRA) and the experiment using bridge simulator that finds out the important factor to avoid marine accidents.As a result of experiments and the analysis,it is clearly important that the officers judged the necessary of the constant lookout for dangerous targets.The analytical approach is effective to find the important factor to avoid marine accident.
June 2013
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2 Reads
The Proceedings of the Industrial Chemical Machinery & Safety Division Conference
Citations (11)
... There are nine factors called common performance conditions (CPC) as the performance shaping factors in CREAM. Those factors are the adequacy of training, availability of plans and procedures, the adequacy of human machine interface (HMI), availability of time, the number of simultaneously target, the quality of cooperation , organizational factors, environmental conditions and the work cycle as shown in Figure 3 [22]. In the quantification of human/operator error probability, the task analysis is required in order to identify the operator actions and activities, including the common performance conditions that affect to the probability of human error. ...
- Citing Article
- Full-text available
September 2012
The Journal of Japan Institute of Navigation
... The related regulations was improved [9] Nowadays, many studies are carried out on navigation visual supporting systems. A study used the data of RADAR ARPA for development of navigation observation system [10][11] [12]. According to the E-Navigaton strategic plan of IMO, the importance of maritime situation awareness for safe navigation is emphasized [13]. ...
- Citing Article
- Full-text available
September 2009
The Journal of Japan Institute of Navigation
... Latterly, maritime human factors had a more systematic classification when [22] generated a Human Factors Analysis and Classification System (HFACS) to identify human errors in maritime accidents. From this perspective, maritime human factors were classified into external, organizational, leadership, precondition, and unsafety acts levels, which was widely used in a great number of models and frameworks [8,[23][24][25]. In addition, STAMP contributed further based on the system theory to address social and organizational structures of maritime safety in terms of human factors [9,26]. ...
- Citing Conference Paper
June 2015
... Yoshimura et al. [25] discussed the dependencies between the common performance conditions adapted for marine accident analysis. Goerlandt and Kujala [26] analysed the reliability of quantitative risk analysis through a case study of ship-ship collision risk analyses for a sea area. ...
- Citing Conference Paper
October 2013
... One respondent learned some of the qualities of a navigator like the importance of being competent navigator on board vessel. The mental workload assessment during ship handling training typically depends on professionals (captain, pilot) with a lot of experience on board [9]. In addition, Ihor et al. [10] claimed that based on the results of the experimental research of successful interaction creation of 'The Ship's Captain and the Pilot' through training technologies, it will promote solving problems in the training of ship handlers, as well as in improving captain skills. ...
- Citing Conference Paper
October 2012
... In maritime collision risk assessment, CREAM is widely used to treat casual factors of human error (Mitomo et al., 2012;Yang et al., 2013;Ung, 2015;Wu et al., 2017;Xi et al., 2017). However, it may require high training and execution times. ...
- Citing Conference Paper
November 2012
... In the previous study, one of the authors proposed a method for identifying navigators' errors in watch keeping based on the behavior analysis of results of bridge simulator experiments, and a situation awareness model was developed to describe the contexts of those errors (Nishizaki 2010, Yoshimura 2012. For the identification, navigators' errors should be determined, and for the determination of such errors, it is essential to select ships having risks of collision correctly. ...
- Citing Conference Paper
November 2012
... Many other studies have been conducted to investigate possible human errors in maritime accidents (e.g. Nishizaki et al., 2012;. Focusing on human and organization factors of maritime accidents, Human Factors Analysis and Classification System (HFACS) is a popular choice to describe human impacts on maritime accidents (e.g. ...
- Citing Conference Paper
November 2012
... The assessment of human performance using neurophysiological methods helps recognize task difficulties and evaluate the qualifications of operators under different circumstances. It has been widely applied to evaluate operators' performance on a newly designed system in terms of practical capability [42,43]. As shown in Table 1, there are an increasing number of methods for neurophysiological measurements, such as wearable eye-tracking devices, EEG, and fNIRS, which were integrated with simulators, motion capture devices, heart rate measurement, and augmented reality, to understand operators' behavior and decision-making patterns in various scenarios [20,[44][45][46]. ...
- Citing Conference Paper
October 2012
... The literature also offers several other, more specific studies on the analysis of maritime accident risk. Among these studies, several different approaches can be distinguished: probabilistic [9], statistical [10] and those based on numerical simulation [11]. However, most of these approaches to the modelling and analysis of maritime accidents either do not take into account lessons that can be drawn from historical data or are restricted to confirmatory analyses 2 . ...
- Citing Article
June 2011