Showing 7 results for Maleki
Zahra Zamanian, Bahram Kouhnavard , Bahram Maleki, Fatemeh Ashrafi, Leyla Ahmadvand, Parisa Azad,
Volume 3, Issue 2 (Journal of Ergonomics 2015)
Abstract
Introduction: As
a healthcare providing establishment, hospitals can be affected by sources of
noise pollution which then impose negative effects on the health and comfort of
patients and personnel. The present study was conducted to determine the
relationship between sound annoyance and general health in the personnel of
university affiliated and non-university affiliated hospitals in Shiraz.
Materials and Methods: The present descriptive analytical study was conducted in four university affiliated
and non-university affiliated hospitals in Shiraz with a sample size of 300
using a predetermined equation and according to the results of previous
studies. The instruments used in the study included the General Health
Questionnaire (GHQ), the Noise Annoyance Scale (NAS) and an audiometer (CEL-440
model).
Findings: The present study
found a small inverse relationship between the total general health score in
the hospital personnel and the sound pressure level at university-affiliated
hospitals (r=-0.103) and a direct positive relationship at non-university
affiliated hospitals (r=0.274), which were not statistically significant
(P≤0.05). The relationship of somatic symptoms, anxiety, insomnia, social
dysfunction and depression to sound pressure was inverse and small (r=-0.195
and P≥0.05). However, there was a direct positive relationship between general
health and sound annoyance (r=0.266 and P≤0.05).Conclusion: According
to the results obtained, noise levels are higher than the acceptable exposure
limit in university-affiliated hospitals, which affect both the patients' and
the personnel's general health, necessitating the adoption of control measures.
Sedigheh Karimi Avargani, Ali Maleki, Shahin Besharati, Reza Ebrahimi,
Volume 8, Issue 3 (Iranian Journal of Ergonomics 2020)
Abstract
Background and Aim: Carriage of backpack sprayers is an inevitable part of agricultural operations that increases the risk of injury along with undesirable changes in walking mechanics. The purpose of this study is to formulate the muscle moment changes in the hip, knee and ankle for the backpack sprayer operator body.
Methods: In this study, a seven-link sprayer operator model is designed and the moment changes in the hip, knee and ankle joints are evaluated. Data are obtained using Plot-digitizer software. Excel software is used to fit the third degree curve on the data.
Results: In the hip joint, the moment is reduced by changing the angle from zero to 15°. At the end of the swing phase, the moment applied to the hip joint increases with increasing the angle up to 30°. In the beginning of the swing phase, the knee joint starts to open at -55°. At the end of the swing phase, the knee joint releases up to -5 ° and the moment applied to the knee joint increases slowly. The moment applied to the ankle joint increases by changing the ankle angle from -7.5° to 7.5°.
Conclusion: According to the results of this study, amount of moment changes of hip, knee and ankle joint affect the force applied to the backpack sprayer operator body. With the knowledge of the moment changes of joints, practical solutions can be provided to reduce amount of damage to these joints.
Majid Lashgari, Mohammadreza Arab, Mohsen Nadjafi, Ali Maleki,
Volume 9, Issue 2 (Iranian Journal of Ergonomics 2021)
Abstract
Background & Objectives: Due to the sound caused by various machines and tools in different agriculture sectors, occupational safety and health should be continuously evaluated. Indeed, the harmful effects of sound can be better reduced when the effects of sound on people's health and performance are fully known.
Methods: In this study, a garden tractor was used. Sixteen volunteers were exposed to the sound of the tractor, and their EEG was recorded at four different engine speeds. Then, Higuchi and Katz methods were used to calculate the fractal dimension of sound signals as well as brain signals.
Results: The results showed that by increasing engine speed, the values of the fractal dimension in both Higuchi and Katz methods increased. The results also showed an increase in the fractal dimension of brain signals due to an increase in engine speed. The regression results also showed a high correlation between the two brain signals and the sound. The coefficient of explanation was 0.896 and 0.859 in Higuchi and Katz methods, respectively.
Conclusion: This study showed that people's reactions, when exposed to sound, can be predicted using the fractal dimension. Therefore, it is possible to estimate the characteristics of brain signals without recording them, which are often costly and time-consuming.
Azam Maleki-Ghahfarokhi, Iman Dianat, Mohammad Asghari Jafarabadi, Mohamad Parnianpour, Mahmood-Reza Azghani, Maryam Khosravifar, Sina Samadi,
Volume 10, Issue 1 (Iranian Journal of Ergonomics 2022)
Abstract
Objectives: The comfort questionnaire for hand tools (CQH) is a subjective measure for exploring the starting points for improving hand tool design. This study aimed to investigate the psychometric properties of the Farsi version of the CQH.
Methods: In this cross-sectional study, which was conducted among 163 university students, the 17-question CQH was translated into Farsi with a translation back-translation procedure. Content validity was assessed by a panel of 10 experts. Exploratory Factor Analysis (EFA) was applied for determining construct validity. Cronbach’s alpha and Intraclass Correlation Coefficient (ICC) were used for assessing internal consistency and test-retest reliability, respectively. Ceiling and floor effects were also estimated for evaluating the feasibility of the measure.
Results: The CQH showed good content validity. Content validity index (CVI) ranged from 0.80 to 1.00 and Content Validity Ratio (CVR) ranged 0.62-1.00. EFA led to extraction of two factors from the data. The first one was mostly related to functionality and physical interaction and the second one, was generally about adverse body effects. The Cronbach’s alpha was 0.74 and test-retest reliability was 0.74 (95% CI = 0.58 to 0.86) which both were satisfactory. There were no (0%) ceiling and floor effects.
Conclusion: The Farsi version of CQH is an acceptable and useful instrument for evaluating hand tools comfort.
Mehran Maleki Roveshti, Mehdi Raei, Firouz Valipour,
Volume 11, Issue 2 (Iranian Journal of Ergonomics 2023)
Abstract
Objectives: Musculoskeletal disorders are an important issue in many healthcare work environments. The aim of this systematic review is to investigate musculoskeletal disorders and occupational risk factors on the physical status of medical staff in Iran.
Methods: In this systematic review, eligible studies from national and international databases, such as PubMed, Embase, Web of Science, Scopus, SID, Magiran and IranMedex from 1390 to 1400 were independently analyzed by two researchers based on the preferred reporting cases of the Guidelines for Systematic Reviews and Meta-Analysis (PRISMA) . MeSH keywords and phrases were used to implement the search strategy.
Results: Of the 360 articles, the full text of 24 articles was finally examined. The results of the study showed that the highest prevalence of musculoskeletal abnormalities and complaints among workers in the last 12 months was related to neck pain (46.01%). Furthermore, among the 24 occupational risk factors identified, prolonged standing (20.83%) and repetitive movements (16.66%) are the most important factors for the occurrence of physical complaints among healthcare workers.
Conclusion: The results of this study can play an important role in strengthening and improving the country's health system in terms of individual, administrative and organizational measures in health centers. In this way, the physical needs, the psychological and ergonomic stresses of the working environment and the health of the treatment staff can be improved.
Maryam Afshari, Mehdi Kangavari, Farogh Mohammadian, Shahnaz Maleki, Farideh Kazemi,
Volume 11, Issue 2 (Iranian Journal of Ergonomics 2023)
Abstract
Objectives: Traffic accidents are one of the leading causes of death among pregnant women. One of the investment for maternal and neonatal health is targeted interventions to increase maternal safety to prevent traffic accidents. Therefore, this study was conducted with the aim of identifying and categorizing different types of safety interventions to reduce traffic accidents among pregnant women.
Methods: The study was a systematic review. Intervention articles were searched from Persian databases, such as Magiran, Iran Medex and SID and English scientific information databases, such as PubMed, Cochrane, Sciencedirect, Embase, Science of Web and Scopus. All identified articles were collected by one person using Endnote software. The full text of the articles was then reviewed by two researchers and the articles that met the entry criteria were identified. Other articles were added to the previous collection of articles using Forward Citation and Backward Citation Reviews. The EPHPP instrument was used to assess the quality of the studies.
Results: The initial search resulted in finding 5329 article abstracts. Finally, two intervention studies were selected for evaluation in this study. One study used an educational/behavioral approach and the other used an engineering/approach. Both studies reported that they had produced significant changes in the desired outcome of seatbelt use in pregnant women. The quality of one study was rated as poor and the other as moderate.
Conclusion: Safety interventions to reduce traffic accidents among pregnant women have been tested only to a very limited extent worldwide. It seems that there is still much room for study in the field of safety interventions to reduce traffic accidents among pregnant women.
Raha Seidi, Mahnaz Saremi, Azam Malekighahfarokhi, Mahshid Namdari,
Volume 12, Issue 2 (Iranian Journal of Ergonomics 2024)
Abstract
Objectives: User engagement with digital technologies refers to the sense of belonging and individual satisfaction. Visual aesthetics, characterized by simplicity and diversity, plays a crucial role in the design of products and online sales strategies. This study investigates the relationship between visual aesthetics and user engagement with in a selected social network.
Methods: This correlational descriptive-analytical study examines the attractiveness of two pages with similar educational content but differing visual aesthetics criteria on one of the social networks. The first page (Researcher-made page) exhibits higher standards of attractiveness compared to the second page (Basic page). Data were collected through online questionnaires and analyzed using SPSS software.
Results: The study involved 116 participants, of whom 91 (78.4%) were female, with an average age of 26.8 ± 2.54 years. The majority of participants held a bachelor's degree (57.8%). The average visual aesthetics scores for the content pages (Researcher-made page) and (Basic page) were 95/92 and 84/9, respectively, indicating that Researcher-made page had greater visual appeal. Furthermore, the user engagement scores for Researcher-made page and Basic page were 107/9 and 100/02, respectively. A significant positive correlation was found between visual appeal and user engagement on both pages (P<0.001), while no significant relationship was observed between gender or education level and these metrics (P>0.05).
Conclusion: This study demonstrates that the visual aesthetics of virtual content pages has a significant impact on user engagement. These findings underscore the importance of adhering to attractiveness criteria in content design, which can be beneficial for content creators, managers, and business owners.
