فهرست مطالب fateme abareshi

 Having a clear understanding of the relationship between risk perception, knowledge, and protective behaviors could play a significant role in occupational risk management. This study aimed to survey the relationship between risk perception and knowledge on the behavior of using respiratory protection equipment in the four National Oil Products Distribution Company.

 In this descriptive cross-sectional study conducted in 2018, 52 workers from the loading and quality control departments of 4 national companies distributing petroleum products in Sabzevar, Bojnourd, Torbat Heydariyeh, and Shahroud participated. Data were collected through a researcher-made questionnaire whose validity and reliability were assessed (CVI: 0.9 and CVR: 0.92 and Cronbachchr('39')s alpha coefficient was determined to be 0.73), and data were analyzed using SPSS19 software, and descriptive statistics and linear regression were analyzed.

 More than half of the participants, who were exposed to the chemicals, use RPDs (Respiratory Protective Devices) all the time and when they are exposed to chemicals. While 75% of them reported using RPDs (Respiratory Protective Devices), reduces the quality of their work. In this study, there was not any significant relationship between RPDs behavior with knowledge and risk perception (P > 0.05). However, the association between work experience and RPDs was negatively significant (p= 0.009). 

 The results of this study suggested that only education and knowledge could not promote individual risk perception, improving protective behavior, therefore other barriers such as uncomfortably of RPDs, or their interference with the worker should be considered. To achieve this goal, the safety and health officials of the companies must pay attention to its quality in addition to the correct choice of these devices.

Computer users are at risk of musculoskeletal disorders due to immobility and static activities, therefore the aim of this study was to evaluate the risk factors of musculoskeletal disorders using ROSA method among computer users of administrative section of Sabzevars hospitals.

In this descriptive-analytical study, which conducted 1397, 151 administrative staff were selected from four hospitals by census method. To investigate the pattern of pain in their limbs, participants completed the Body Map checklist and ROSA method was used to assess the ergonomic risk factors at workstations. Data were analyzed using SPSS software and t-test, Chi-Square / Fisher's Exact and Pearson statistical tests was analyzed.

The results showed that the most pain and discomfort reported among the participants were in the lower back (54.32%), back (51.16%), neck (44.24%), and shoulder (38.97%), respectively. Moreover, knee (36.02%). It also showed a significant relationship between age, work experience, exercise and gender with musculoskeletal pain (P-value <0.05). There was a significant relationship between chair score with pain in back, back and knees and mouse and keyboard score with pain in shoulder and wrist (P-value <0.01).

The high prevalence of musculoskeletal pain and the high score obtained in the ROSA method among hospital staff is evidence of the need for ergonomic interventions among them.

Nail extension is a profession which is entered Iran recently and is expanding vastly. Every profession has its own harmful effects therefore working in nail salons regarding to awkward posture while nail services and equipment and tools which use in this profession makes nail technician face to Ergonomic risk factors. This study was conducted to evaluate the ergonomic status of nail workers in Sabzevar This descriptive-analytic study was done among nail workers in beauty salons. Nordic questionnaire was used to determine incidence of muscoloskeletal disorders and novel Ergonomic Pos-tural Assessment (NERPA) method utilize in order to evaluate body posture. Also local lighting of the work surface was measured to determine its association with muscoloskeletal disorders. Data were analysed using SPSS 17. The prevalence of pain in neck (63.8%), upper back (51.3%), waist (42.5%), shoulder (41.3%) and wrist (6.37%) has the highest value Body posture assessment using NERPA method also showed in all cases (100%), the final score was reached at the highest level (score 7 and the need for immediate change). In addition the intensity of local lighting was lower than the mandatory OEL level of Iran (53.19%) As the finding indicated, nail services as a unknown job and therefore lack of knowledge about this profession and also inadequate monitoring by occupational hygiene inspectors cause high incidence of muscoloskeletal disorders among nail workers, therefore in order to reduce these complications, health care organizations should pay more attention to establish roles and standards.

Modern technology has imposed more cognitive demands than physical demands to operators in most workplaces.The Increase of cognitive demands in real working conditions can have negative effect on the mental health and performance of operators. This study was coducted with the aim of subjective and objective evaluation of operators’ mental workload in a city traffic control room.
In this study 16 opeartors of a traffic control center participated voluntarily. In setteled day at resting condition the physiological indices were measured for 5 minutes before the work started and after it was finished for each operator. Regarding to the city traffic density (low and high mental work conditions) the physiological indices were measured for 5 minuts in each condition. Also at the end of each condition the NASA-TLX questionaire was completed by each operator. The data were analysed using t-test and repaeated measure analysis of variance by SPSS.21 software.
The Results of our paired t-test showed a significant differences between the subjective responses of operators in all dimensions of NASA-TLX except for physical demand in low mental workload condition compared to high mental workload.The Findings of the repeated measures of ANOVA showed that there is a significant differences between the mean of heart rate, SDNN, RMSSD and LF/HF ratio features by increasing difficulty of mental work compared to before and after rests among operators.
Our finding indicated that with increasing traffic density a lot of mental load imposed to operators that can cause to mental health problem and decrease performance among operators in future. Therfore, in the traffic control room, organizing and managing human resources based on the work load of the work in different working conditions is recommended.