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The Survey of Relationship between the Sleep Quality with Cognitive Failures and Job Performance among Airport Staff
Mis Afrouz Rostampour, Mr Heidar Mohammadi, Mr Razzagh Rahimpour, Mis Fatemeh Sarvi, Mis Elahe Dortaj, Mr Mansour Ziaei, Mis Simin Safarpour, Mr Abdolrasoul Rahmani,
Volume 9, Issue 4 (Iranian Journal of Ergonomics 2022)
Abstract
Background and Objectives: Mental and physical fatigue of airport staff reduces their job standards and productive concentration. The objective of this study was to examine the sleep quality and its effect on cognitive failure and job performance among airport staffs.
Methods: In this descriptive-analytical study, 200 staff of an airport were chosen by simple random sampling method. The data collecting tools were four questionnaires that comprised demographic characteristics, sleep quality, cognitive failures, and job performance. Data was analysed using descriptive statistics and regression tests.
Results: Based on the findings, the mean total scores of the sleep quality, cognitive failures, and job performance were 6.78 ± 3.23, 65.22 ± 20.36 and 39.59 ± 5.59, respectively. The results showed that the mean score of sleep quality in the two areas of sleep latency (1.5 ± 0.82) and sleep duration (1.43 ± 1.05) was higher than other subscales. According to the findings, there was a significant inverse relationship between sleep quality score and cognitive failures score with job performance score (r = -0.195, P < 0.05), While the sleep quality score and cognitive failure score showed a positive and significant correlation (r = 0.389, P < 0.05).
Conclusion: The findings demonstrated a significant relationship between sleep quality and cognitive failure, so that with decreasing this factor, cognitive failure of airport staff also increased and the probability of the human error increased. Therefore, enhancing the sleep quality and comfort by providing ergonomic solutions the cognitive failure in staff and consequently job performance would be greatly prevented.

A Narrative Review of the Role of Green Ergonomics and Ecological Ergonomics in Achieving Zero Waste.
Ayoub Ghanbary Sartang, Negar Safarpour Khotbesara, Zahra Rahimi, Mahboubeh Abedi, Hojatollah Hossainian, Mohsen Poursadeghiyan,
Volume 14, Issue 1 (Iranian Journal of Ergonomics-In Press 2026)
Abstract
Background and Objectives: This study, based on the DIN 91436 standard framework, examines the role of new approaches in realizing sustainable waste management systems and reducing negative environmental impacts.

Materials and Methods: This review study was conducted through a systematic search of international databases (PubMed, Google Scholar, Scopus, ScienceDirect, and Web of Science) and Persian databases (SID, Magiran, IranMedex, and IranDoc) for articles published from 1990 to 2025. The search strategy included a combination of keywords and articles were selected based on inclusion and exclusion criteria, and then the extracted data were categorized and clarified through thematic analysis.

Results: According to studies, green ergonomics is effective through sustainable design of products and processes, reducing waste at source, and increasing recycling and is in line with the prevention stage within the framework of the DIN 91436 standard. Also, by analyzing human-environment interactions, Ergoecology provides a systematic framework for achieving zero waste with an emphasis on technical, social, and environmental dimensions. By combining these two approaches within the framework of the aforementioned standard, an effective path towards a circular economy and sustainable waste management is mapped out, while investigations of chemists, consist of some materials or methods that can be degraded and damage environment overall and are in contrast with zero waste.

Conclusion: Varity of experimental sciences, researches and technologies finally tag various damages to environment that some of them debated in this study. Achieving zero waste requires the integration of the three main pillars of green ergonomics, ergo-ecology, and the implementation framework of the DIN 91436 standard. This integration not only reduces waste and conserves resources, but also promotes human health and environmental sustainability. To institutionalize this approach, it is necessary to expand interdisciplinary research, incorporate its principles into policymaking, and invest in education and culture among all stakeholders.
 

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