Showing 5 results for Seif
Fatemeh Seif, Tahereh Yektaee, Mostafa Pouyakian,
Volume 1, Issue 1 (Journal of Ergonomics 2013)
Abstract
Introduction: Lack of attention to the ergonomic measures
and standards in making PowerPoint slides can result in visual fatigue, less
attention to the content of the lecture and lower quality of training. This
study aimed to identify the most popular Persian fonts and font sizes used by
students in making PowerPoint slides and to investigate the students'
subjective perception of the three features of legibility, formality and
attractiveness of these fonts.
Materials and Methods: At first, five most widely used
Persian fonts in providing PowerPoint slides were identified in 84 students
from Tehran University of Welfare and Rehabilitation Sciences. Then, ten slides
were prepared containing simple and familiar sentences based on the five
popular fonts and two Different font sizes (24 and 28). Afterwards.40 college
students evaluated the eligibility, formality and attractiveness of the fonts
and font sizes used in each slide by a seven-item Likert scale.
Results: One-way ANOVA Revealed significant
differences between the students' subjective perception of legibility,
formality and attractiveness of the fonts used in the slides. In terms of
eligibility and attractiveness, slide 10 (B Titr, 28) was top rated and slide 4
(lotus, 24) was ranked as lowest by the participants. In terms of eligibility
and attractiveness, slide 10 (B Titr, 28) was top rated and slide 4 (lotus, 24)
was ranked as lowest by the participants.
Conclusion: This
study explored the effects of anatomical characteristics of the B Nazanin, B
Titr and Lotus Persian fonts on the Students’ perception of legibility,
formality and attractiveness. The findings suggested that the type of Selected
font in PowerPoint slide design could influence the viewers’ perceptual
features of legibility, attractiveness and formality. Thus, disregarding the
ergonomic aspects of selected Persian fonts may deteriorate the quality of
training. Further studies are needed to examine the ergonomics aspects of wider
types of Persian fonts in broader sample sizes.
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Mehdi Omidi, Amin Asgharzadeh, Seifollah Gharib, Mohsen Vahedi, Amir Salar Jafarpisheh,
Volume 8, Issue 4 (Iranian Journal of Ergonomics 2021)
Abstract
Background and Objectives: The proliferation of computers, along with the development of software and the Internet, has revolutionized the work and life of people with disabilities, including those with spinal cord injuries with limited mobility in the arms. The efficiency and usability of the aids provided to these people is very important; because they have more limitations than ordinary people. The purpose of this study was to compare the efficiency and usability of human-computer interface in cervical spinal cord injury with two biofeedback EMG methods based on computer games and without computer games.
Methods: The sample size was 20 participants (healthy and with spinal cervical lesions) who were selected regarding availability. The statistical population of the study (that was conducted 2019-2020) was spinal cord injury patients referred to spinal cord injury clinic in Tehran. Participants received three 30-minute sessions per week for 1 month of EMG biofeedback training and game-based biofeedback interventions. SPSS version 23 was used for data analysis.
Results: Results showed that participants considered using EMG biofeedback and game biofeedback as 75/8% and 72/0% usability. Over time, the “through put” numerical values of the variable decreased in healthy individuals and spinal cord injury. Also, the numerical values of this variable were lower in healthy individuals than in individuals with spinal cord injuries. The maximum reduction in numerical values of the “through put” variable appeared between the first and sixth sessions.
Conclusion: The EMG and gaming biofeedback system can be used for interaction and control such as computers, wheelchairs, and more.
Fereshteh Hosseini, Mehrnaz Haghighi, Seifollah Gharib,
Volume 10, Issue 4 (Iranian Journal of Ergonomics 2023)
Abstract
Objectives: Effectiveness assessment of multifaceted long-term ergonomics interventions in an automotive company Introduction: Prevention of musculoskeletal disorders requires evaluation and improvement of work situations using ergonomic posture assessment methods. The purpose of this study was to determine the effectiveness of multifaceted and long-term ergonomic interventions in a developing automobile manufacturing company using the Rapid Office Strain Assessment (ROSA) method.
Methods: A long-term multifaceted intervention study was conducted on 70 office employees of an automotive engineering service company in three stages from 2016 to 2022. Interventions were carried out according to the scores obtained in the sub-areas of the ROSA method including chair, mouse and keyboard, telephone, and monitor. The interventions included technical-engineering and educational interventions. Finally, descriptive statistics and paired t-tests, Pearson correlation coefficient and multiple linear regression were used to analyze the data.
Results: The average score of ROSA in 2016 was 5.9 with a standard deviation of 0.66, while the average score of ROSA in 2022 was 3.85 with a standard deviation of 1.19. There was a statistically significant difference between the final score of ROSA in 2016 and 2022 (P < 0.001). Statistical tests showed that only the technical-engineering intervention had a significant effect on the ROSA final score.
Conclusion: The results of the present study have shown a favorable reduction in the final risk level of the physical condition of the employees during work due to the improvement of the physical condition as a result of the technical-engineering intervention along with the educational intervention in accordance with the components of the ROSA method.
Zohreh Goudarzi, Sara Izadi, Abbas Seifollah Zade, Roghayyeh Hassanzadeh, Neda Mahdavi,
Volume 11, Issue 4 (Iranian Journal of Ergonomics 2024)
Abstract
Objectives: Musculoskeletal disorders are among the health challenges for faculty members, affecting their performance and work-related quality of life. The present study aimed to investigate the relationship between these disorders and the ergonomic features of their workstations.
Methods: This research was conducted among 22 faculty members after obtaining informed consent and using a census method. The prevalence of disorders was assessed using the Cornell questionnaire, and the evaluation of the workstation was performed using the Rapid Office Strain Assessment (ROSA) method. Then, 14 anthropometric dimensions (differentiated by gender) were measured, and 13 workstation characteristics were assessed. Finally, 11 criteria were used for anthropometric fitness evaluation. Moreover, data analysis was carried out using SPSS software (version 26).
Results: Approximately 46% of the participants had experienced pain and discomfort in one of the musculoskeletal areas, with the wrist, neck, shoulder, and lower back being the most affected areas, respectively. The ROSA results indicated that 22.73% of the participants' workstations required ergonomic improvements. The most significant mismatches were found in the criteria of 1) trunk length-chair backrest length, 2) thigh thickness in a seated position-distance between thighs and desk, and 3) shoulder width-chair seat width.
Conclusion: The signs of a connection between the high prevalence of musculoskeletal disorders and the lack of anthropometric compatibility/inadequate knowledge among faculty members in the field of ergonomics were observed. This issue underscores the importance of considering ergonomic/anthropometric characteristics of office desks and chairs during the procurement of office supplies and emphasizes the need to enhance ergonomics knowledge.
Masoumeh Seif, Kamal Ranjbar, Mahbanoo Ghaderi,
Volume 14, Issue 1 (Iranian Journal of Ergonomics-In Press 2026)
Abstract
Objectives: The purpose of this study was to investigate the effects of combined functional exercise training on fear of falling, salivary cortisol levels and quality of life in older adults with fear of falling.
Methods: Forty older adults (16 men and 24 women aged ≥65 years) with fear of falling were randomly assigned to either a control group (n = 20, 8M/12F) or an exercise group (n = 20, 8M/12F). The exercise group participated in an 8-week combined training program consisting of resistance, balance, and flexibility exercises, while the control group maintained their usual lifestyle. Quality of life (LEIPAD questionnaire) and fear of falling (FES-I) were assessed before and 48 hours after the intervention in both groups. Salivary cortisol levels were also measured using the ELISA method.
Results: Fear of falling was significantly lower in the training group compared to the control group after the intervention (p < 0.0001). The 8‑week combined exercise program resulted in a 51% reduction in fear of falling among the older adults (p < 0.0001). Quality of life significantly improved in the training group compared to the control group (p ≤ 0.001). Moreover, salivary cortisol levels were lower in the training group than in the control group (p ≤ 0.0001), while the combined exercises produced a 19.5% reduction in cortisol compared to pre-training levels (p = 0.07).
Conclusion: Combined functional exercise program significantly reduced fear of falling and improved quality of life in older adults, while also inducing a downward trend in cortisol levels. Therefore, such programs can be recommended as safe and effective strategies in geriatric rehabilitation settings
