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Showing 3 results for Khazaei
Ergonomic Assessment and Design of the Tower Crane Cabin Based on Anthropometric Dimensions of Iranian Operators
Mohammadreza Jannati, Hamed Aghaei, Taleb Askaripoor, Mehdi Khazaei, Ehsan Bayat Khalaji, Elahe Kazemi,
Volume 8, Issue 2 (Iranian Journal of Ergonomics 2020)
Abstract
Background and Aim: Despite the main role of cranes in advancing construction operations, however, accidents and occupational injuries resulting from their activities have become a critical issue. Recent evidence suggests that the cause of these problems may be associated with the absence of design of the interior space of the crane cabin, and the tasks of the operators, based on ergonomic principles. This study was conducted to assess the ergonomic risk of the tower crane operator’s activities and redesigning the dimensions and interior space of these cranes, based on the anthropometric dimensions of Iranian operators.
Methods: In this descriptive cross-sectional study, 30 male tower crane operators working on three major construction projects in Tehran were investigated. Initially, a multi-step approach was applied to define the problem, including: observing the working statuses, interviewing operators, Nordic Musculoskeletal Disorder Questionnaire, and rapid upper limb assessment (RULA) method. Then, using anthropometric data, the dimensions and interior space of the crane chamber were redesigned.
Results: The results of the rapid upper limb assessment method showed that the activities of tower crane operators were at high and very high-risk levels. Also, 85% and 38.5% of these people reported pain and discomfort in one of the nine areas of their body in the last 12 months and 7 days, respectively. In this study, the dimensions of the interior space of the redesigned tower crane cabin were obtained 160.8×144.1×199.7.
Conclusion: Based on the results of the study, it can be concluded that the current interior design of the tower crane cabin does not fulfill the needs of the operators. Hence, redesigning it appears essential to enhance human-machine compatibility, improve safety and productivity, and prevent musculoskeletal disorders (MSD).

Improving the Literacy of Musculoskeletal Health in Students: Brief Policy
Hossein Saremi, Saideh Sadat Mortazavi, Sima Naderifar, Homa Naderifar, Amir Shamlou-Kazemi, Salman Khazaei,
Volume 10, Issue 4 (Iranian Journal of Ergonomics 2023)
Abstract
Abstract: Musculoskeletal disorders are one of the three major disabling diseases in the world. However, the burden of disease in Iran is not yet well-known. Due to the high prevalence of musculoskeletal disorders in students, prevention and control policies should focus on students and health interventions should be carried out based on risk factors. Musculoskeletal problems impose significant economic costs on health and indirectly affect the productivity of people. Therefore, it is essential to provide new approaches aimed at maintaining and improving musculoskeletal health and preventing and managing diseases.

Relationship of Stress and Insomnia with Depression among Health Care Workers in Hamadan, Iran: Application of Path Analysis
Salman Khazaei, Mobin Faghih Soleimani, Saman Khosronejad, Ali Safdari, Ensiyeh Jenabi, Shokoufeh Eskandari, Erfan Ayubi,
Volume 12, Issue 1 (Iranian Journal of Ergonomics 2024)
Abstract
Objectives: Various causal pathways play a role in the occurrence of depression in healthcare workers. This study aimed to assess the effect of perceived stress and insomnia on depression in healthcare workers using path analysis in Hamadan, Iran.
Methods: In this cross-sectional study, healthcare workers from Shahid Beheshti and Sina hospitals in Hamedan in 2023 were recruited. Perceived stress with two subscales of perceived helplessness and perceived self-efficacy, as well as insomnia and depression, were investigated using validated questionnaires. The path analysis was applied to assess the association.
Results: In total, 235 healthcare workers (35.7% nurses) were included. Gender, age, monthly working hours, and number of night shifts per month had a significant impact on depression (P<0.05). Path analysis demonstrated that except for the effect of perceived self-efficacy on insomnia, all standardized regression weights for relationships were statistically significant (P<0.05). The effect size of perceived helplessness on depression was the strongest compared to other relationships (standardized regression weight = 0.40). The direct effect of perceived helplessness and perceived self-efficacy on depression or insomnia as a mediator had a good fit to the data.
Conclusion: As evidenced by the obtained results, with the implementation of intervention and preventive programs to reduce stress and improve sleep, the occurrence of depression in healthcare workers is expected to decrease significantly.

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