An Analysis of How Physical and Social Factors Influence …
191
Table 1 Subject’s features
Subject BMI a Age
(years)
Smoker Drinker b Seniority
(years)
Cardiovascular
problems
Personal
problems
1
30.2
49
Yes
–
25
–
x
2
26.4
52
Yes
–
29
x
x
3
25.8
47
Yes
–
22
–
x
4
32.4
57
–
Yes
34
–
x
5
24.8
51
Yes
Yes
33
x
x
6
24.5
50
Yes
Yes
31
x
x
a Overweight = 25–29.9; Obesity = 30 or greater
b More than two glasses of wine/day (when not on the ship)
These subjects work in difficult conditions: multiple tasks due to numerical
reduced crew, limited space for rest and recreation, a work schedule which is
not respected, not enough sleep (frequently interrupted), etc., factors that lead to
lower performance that they would have had under normal working conditions (8 h
schedule).
2.5 Method for Determining a Efficiency of Crew Members
of a Ship Running on the Danube
The subjects solved the Purdue Pegboard test, under the same types of vibration and
noise exposure. The Purdue Pegboard test uses a board with two parallel rows, each
with 25 holes into which the examinee places cylindrical metal nails. There is a short
briefing at the beginning of the test. The subsets for preferred, non-preferred and
both hands require the subject to place the pins in the holes as quickly as possible,
and the score is the number of pins placed in 30 s. The test was repeated three times
in three different days: day 1, day 4 and day 6 [20].
3 Results and Discussions
For all cases were calculated the averages of the values obtained from at least five
measurements.
191
Table 1 Subject’s features
Subject BMI a Age
(years)
Smoker Drinker b Seniority
(years)
Cardiovascular
problems
Personal
problems
1
30.2
49
Yes
–
25
–
x
2
26.4
52
Yes
–
29
x
x
3
25.8
47
Yes
–
22
–
x
4
32.4
57
–
Yes
34
–
x
5
24.8
51
Yes
Yes
33
x
x
6
24.5
50
Yes
Yes
31
x
x
a Overweight = 25–29.9; Obesity = 30 or greater
b More than two glasses of wine/day (when not on the ship)
These subjects work in difficult conditions: multiple tasks due to numerical
reduced crew, limited space for rest and recreation, a work schedule which is
not respected, not enough sleep (frequently interrupted), etc., factors that lead to
lower performance that they would have had under normal working conditions (8 h
schedule).
2.5 Method for Determining a Efficiency of Crew Members
of a Ship Running on the Danube
The subjects solved the Purdue Pegboard test, under the same types of vibration and
noise exposure. The Purdue Pegboard test uses a board with two parallel rows, each
with 25 holes into which the examinee places cylindrical metal nails. There is a short
briefing at the beginning of the test. The subsets for preferred, non-preferred and
both hands require the subject to place the pins in the holes as quickly as possible,
and the score is the number of pins placed in 30 s. The test was repeated three times
in three different days: day 1, day 4 and day 6 [20].
3 Results and Discussions
For all cases were calculated the averages of the values obtained from at least five
measurements.