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Pages 13-21

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From page 13...
... 13 The overall objective of this research was to develop a compendium of best practices for enhancing sleep efficiency on towboats in the U.S. tug/towboat/barge industry.
From page 14...
... 14 Enhancing Sleep Efficiency on Vessels in the Tug/Towboat/Barge Industry 2. Survey crew members from the previous Phase IV study to assess the impact of current operational practices on their sleep efficiency.
From page 15...
... Research Approach 15 The team also included a few key questions in the survey of crew members to determine whether they had taken advantage of the programs provided by their company, and, if so, what the perceived benefits or weaknesses of the program were, particularly in impacting sleep efficiency. Crew without access to these types of programs were asked to rate how likely they would be to use such a program and how beneficial they believe such a program would be if available to them.
From page 16...
... 16 Enhancing Sleep Efficiency on Vessels in the Tug/Towboat/Barge Industry There were two levels of participation for the crew. Level 1 was a survey only (see Table 3 in Section 2.4 for a summary of survey items and Appendix B for a full copy of the survey)
From page 17...
... Research Approach 17 sinusoidal variation in performance resulting from the circadian rhythm, the 24-hour rhythm in body temperature (Process C)
From page 18...
... 18 Enhancing Sleep Efficiency on Vessels in the Tug/Towboat/Barge Industry In Figure 1 nighttime is indicated by gray bars, sleep by blue bars, work shift by black bars, and predicted performance by black (waking) and blue (sleeping)
From page 19...
... Research Approach 19 In order to identify barriers that inhibit tug/towboat/barge personnel from adopting good sleep management practices and then develop best practices to overcome these barriers, extensive analyses were conducted of the new data collected as part of this research and relevant data from prior studies were re-examined. As part of these efforts, those groups of individuals who did or did not change their sleep-wake behaviors were identified, the degree determined, and why.
From page 20...
... 20 Enhancing Sleep Efficiency on Vessels in the Tug/Towboat/Barge Industry 2.4.1 Identify Factors That Predict the 20% Best and 20% Worst Sleepers Using daily sleep data, the average daily sleep amount for each subject was first calculated and then all subjects were ranked based on their daily sleep amount. The top 20 percentile of the subjects as long sleepers (the daily sleep amount is longer than 8.6 hours)
From page 21...
... Research Approach 21 As part of the management survey the research team asked respondents to rate the effectiveness of a particular practice if their company had it in place. The research team also followed up with selected respondents by conducting interviews (see Section 3.2.1.1)

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