Application Possibility of Engine Drivers' Body Segments Ratios in Designing the Cab' Working Environment in Croatia

Abstract

A total of 25 anthropological measures important for the engine driver's cab design were taken from a sample of 51 male engine drivers from all parts of Croatia, out of which 5 and 95 percentiles along with central 90 % were determined. According to scientific findings that body height decreases with age, subjects were divided by age into four groups. Calculated arithmetic mean and harmonic mean of ratios hi/h for individual anthropological measures hi in relation to the standing height h are the same for all age groups, with minor deviations. The research has been taken whenever it was possible to use body ratios hi/h for the design of driver's cab in new vehicles adapted to the target population of drivers, only by knowing standing height and mass span in the central 90%. For final conclusions the research should be repeated with a larger sample, taking into account amounts of BMI within each age group because of insufficient and unequal number of respondents in age groups.

Analysis of Students' and Tram Drivers' Body Ratios in Order to Simplify the Control Panel Design

“…Mean arithmetic values of body ratios h r /h and h š /h of all groups of respondents shown in Tables 5 and 6 are almost same with the mean arithmetic values of body ratios h r /h and h š /h of all four age groups for fifty one (51) researched engine drivers from Croatia, which were in the range from 27 to 56 years of age in 2015 [7]; and also those are almost the same with the mean arithmetic values of body ratios h r /h and h š /h of 68 female student from the University of Zagreb in 2016 (another sample from the same population) [8].…”

“…Mean arithmetic values of body ratios h mdr /h = 0.36 (ratio of maximum arm reach and body height) and h ndr /h = 0.2 (ratio of normal arm reach and body height) of all groups of respondents shown in Tables 5 and 6 are completely the same with the mean arithmetic values of body ratios h mdr /h and h ndr /h of all four age groups for fifty one (51) researched engine drivers from Croatia [7], and also those are completely the same with the mean arithmetic values of body ratios h mdr /h and h ndr /h of 68 female students from the University of Zagreb in 2016 (another sample from the same population) [8]. Generally considering, dynamic anthropometric measures, maximum arm reach h mdr and normal arm reach h ndr are linear functionalities depending on the standing body height h [7], and this fact can be the reason why those body ratios do not depend on the changes of body height depending on age.…”

“…The results of a few own studies confirm that gender is a significant factor of body stature. The age of fifty-one (51) researched engine drivers from Croatia, which are in the range from 27 to 56 years of age, significantly affects body height h and other anthropometric measures h i that are functionally dependent on the body height h [7], which is for body height h confirmed by the results shown in Table 3. The values of anthropometric measures for male tram drivers in Zagreb shown in Table 4 partially confirm that age is a significant factor of body stature, because the largest value of arithmetic mean M of body height h is in the age group from 30 up to 39 years of age.…”

“…The presented results represent only a smaller part of the larger scale research which includes several separate studies of male engine drivers from all regions of Croatia [7], male and female tram drivers of ZET Zagreb and male and female students of the University of Zagreb.…”

Analiza kognitivnog opterećenja strojovođe putničkog vlaka s obzirom na Hrvatski nacionalni sustav vođenja vlakova

“…BMI). Takva dominantna gojaznost i pretilost strojovođa s više od 30 godina starosti zajedno s neželjenim hipotetskim razmještajem često korištenih komandi za ručno posluživanje u maksimalnom dosegu ruku (što je moguća pogreška kod dizajna upravljačnice) izrazito negativno djeluje na iznos lumbalnog momenta M ly u lumbalnom dijelu kralježnice na razini kralježaka L4/L5 te stoga negativno djeluje na radno opterećenje strojovođe (Mikulčić et al, 2015. ).…”