Showing 5 results for Gharagozlou
Faramarz Gharagozlou, Jebraeil Nasl Saraji, Adel Mazloumi, Ali Nahvi, Ali Motie Nasrabadi, Abbas Rahimi Foroushani, Mohammadreza Ashouri, Mehdi Samavati,
Volume 1, Issue 1 (Journal of Ergonomics 2013)
Abstract
Introduction: Driver fatigue is one of the major causes of
accidents in roads. It is suggested that driver fatigue and drowsiness
accounted for more than 30% of road accidents. Therefore, it is important to
use features for real-time detection of driver mental fatigue to minimize
transportation fatalities. The purpose of this study was to explore the EEG
alpha power variations in sleep deprived drivers on a car driving simulator.
Materials and Methods: The present descriptive-analytical study was
achieved on nineteen healthy male car drivers. After taking informed written
consent, the subjects were requested to stay awake 18 hrs before the
experiments and refrain from caffeinated drinks or any other stimulant as well
as cigarette smoking for 12 hrs prior to the experiments. The drivers sleep
patterns were studied through sleep diary for one week before the experiment.
The participants performed a simulated driving task in a 110 Km monotonous
route at the fixed speed of 90 km/hr. The subjective self-assessment of fatigue
was performed in every 10 minute interval during the driving using Karolinska
Sleepiness Scale (KSS). At the same time, video recordings from the drivers
face and their behaviors were achieved in lateral and front views and rated by
two trained observers. Continuous EEG and EOG records were taken with 16
channels during driving. After filtering and artifact removal, power spectrum
density and fast Fourier transform (FFT) were used to determine the absolute
and relative alpha powers in the initial and final 10 minutes of driving. To
analyze the data, descriptive statistics, Pearson and Spearman coefficients and
paired-sample T test were employed to describe and compare the variables.
Results: The findings showed a significant increase in
KSS scores in the final 10 minutes of driving (p<0.001). Similar results
were obtained concerning video rating scores. Meanwhile, there was a
significant increase in the absolute alpha power during the final section of
driving (p=0.006).
Conclusion: Driver mental fatigue is considered as one of
the major implications for road safety. This study suggests that alpha brain
wave rhythm can be a good indicator for early prediction of driver fatigue.
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Behzad Karami Matin, Azar Mehrabi Matin, Mansour Ziaei, Zeinab Nazari, Hamed Yarmohammadi, Faramarz Gharagozlou,
Volume 1, Issue 2 (Journal of Ergonomics 2013)
Abstract
Background and aim: the workers in Quarry and Stone Industries done frequently some duties including lifting and carrying of heavy loads and they are exposed to high risk of cumulative trauma disorders. The aim of this study was to comparing the prevalence of musculoskeletal disorders and risk of work postures in Quarry and Stone Industries workers.
Material and methods: this cross-sectional and analytical study was done on 63 workers of Stone Industries and 46 workers of Quarries in Kermanshah. Data were collected using by Nordic standard questionnaire, Body map chart and REBA method. The gathered data was been analyzed by Independent t-test, Mann-Whitney, Spearman and Pearson tests. P was 0.05.
Results: The most prevalence of musculoskeletal disorders in both Stone and Quarry industries was related to low back that was 54% and 39% respectively. Mean and standard deviation of final scores of REBA in Stone and Quarry workers were 9.06±1.45 and 4.6±1.18 respectively. Results shows that a significantly correlation between age, work history and BMI with musculoskeletal disorders in Stone Industries and between age and work history with this disorders in Quarries (P<0.05).
Conclusion: the results shows that the risk level of REBA and prevalence of musculoskeletal disorders of Stone Industries was more than Quarries in shoulder, wrist, hand, lumbar, femur, knee, leg and ankle.
Mansour Ziaei, Hamed Yarmohammadi, Meisam Moradi, Faramarz Gharagozlou,
Volume 1, Issue 3 (Journal of Ergonomics 2014)
Abstract
Introduction: Working with Visual Display Terminals (VDTs) can be associated with visual complaints particularly visual fatigue and symptoms including headache, disruption in continuing the work and ocular disorders. The objective of the present study was to determine the prevalence of visual fatigue and its related risk factors in computer users of Kermanshah University of Medical Sciences in 2013.
Materials and Methods: This descriptive-analytical study was achieved on 260 computer users. The data were collected by Visual Fatigue, demographic and job questionnaires. For data analysis, Spearman, Mann-Whitney and Kruskal-Wallis tests were used.
Results: The mean (SD) age of the users was 36.74 (7.74) and daily working time with VDTs was 5.85 (2.28) hours. Visual fatigue score was 2.99 (1.97), so that 32.3% of computer users had severe eye fatigue. Meanwhile, 45.4, 21.9, 32.7 and 46.2 percentage of users suffered severely from eye strain, visual impairment, eye-surface disorder and extra-ocular problems. Visual fatigue incidence and its compliments were significantly increased with increasing of age, work experience and daily working hours with computer (p<0.05). Visual fatigue was higher in users wearing glasses than those not wearing glasses (p<0.001) and was lower in monitor to window angle of 90º than two other monitor to window positions of 0º (p=0.041) and 180º (p=0.036).
Conclusion: The prevalence of visual fatigue among computer users was very high. Visual fatigue and its serious consequences can be prevented by applying the principles of ergonomics such as regular and short breaks, looking at distant objects, blinking regularly and reducing the direct and indirect glares.
Mansour Ziaei, Hamed Yarmohammadi, Behzad Karamimatin, Soudabeh Yarmohammadi, Zeinab Nazari, Faramarz Gharagozlou,
Volume 2, Issue 2 (Journal of Ergonomics 2014)
Abstract
Background: Nurses’ Burnout can lead to increasing absenteeism and also decreasing energy and quality of service that provided by them. The aim of this study was to determine the prevalence of occupational burnout and its related factors among nurses of a hospital in Kermanshah city in 2013.
Materials and Methods: In this cross-sectional and descriptive-analytical study 189 nurses were selected randomly. Data were collected by demographic questionnaire and Maslach Burnout Inventory (MBI). The gathered data were analyzed by Pearson, Independent T-test and ANOVA in statistical level of p≤0.05.
Results: Mean score of occupational burnout was 61.89. 39.2% nurses reported high emotional exhaustion, 37.6% high depersonalization and 73.5% of them had low personal accomplishment. There were statistical relationship between emotional exhaustion with employment status (p=0.015) and educational degree (p=0.041), between depersonalization with employment status (p=0.022) and working shift (p=0.023), and also between personal accomplishment with age (p=0.010), working experience (p=0.002) and shift working (p=0.045).
Conclusion: The level of nurses’ occupational burnout was average to high. The causes may be high workload, unsafe and boring work environment and high stress. It can be increased the commitment, positive sense to work and personal accomplishment can be reinforced by correct management of human resources including the determination of duties and strategies according to nurses’ ability, new approaches for encouragement and motivation as well as running stress management workshops.
Mansour Ziaei, Ghobad Rezaei, Hamed Yarmohammadi, Elahe Khoshboo, Faramarz Gharagozlou,
Volume 3, Issue 1 (Journal of Ergonomics 2015)
Abstract
Introduction: Job involvement is defined as one’s psychological dependence on his/her job. Employees with high job involvement
pay more attention to their job. The present study aimed to determine the relationship between teachers’
job involvement and demographic characteristics in Kermanshah (Iran) secondary
schools during 2013.
Materials and Methods: This cross-sectional study was
performed on 211 teachers (161 male and 50 female). Data were collected using
the Job Involvement Scale. The collected data were analyzed using Spearman’s
correlation coefficient, independent t-test, and analysis of variance (ANOVA).
P values less than 0.05 were considered significant.
Results: The teachers’ mean age and work experience were 32.21 and
8.49 years, respectively. Low, moderate, and high levels of job involvement were
detected in 22.3%, 54.5%, and 23.2% of the teachers, respectively. Job
involvement was significantly higher in married teachers than single subjects
(p = 0.027). Moreover, teachers without a second job had higher job involvement
than those with a second job (p = 0.006). There were no statistical
correlations between job involvement and age, sex, work experience, or level of
education.
Conclusion: The participating teachers
generally had low-moderate levels of job involvement. Low salary, working
multiple jobs, and low social prestige were mostly responsible for such low
levels of job involvement. Therefore, increasing teachers’ salary, providing
teachers with special facilities (e.g. low-interest loans), and developing a system
for teachers’ promotion (similar to that existing for faculty members) can be
effective in increasing job involvement among teachers
