
Majid MotamedzadeHamedan University of Medical Sciences | UMSHA · Department of Ergonomics
Majid Motamedzade
Professor
About
120
Publications
41,870
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Introduction
Majid Motamedzade currently works at the Department of Ergonomics, Hamadan University of Medical Sciences. Their current project is 'Development of a daylight availability database and an optimized daylight illumination method for the main industrial sectors in Iran'.
Additional affiliations
February 1993 - present
January 1993 - present
Publications
Publications (120)
This study was conducted in Iranian carpet industry to determine the prevalence of upper limb problems associated with hand tools design, investigate the design of hand tools currently used in carpet weaving operation, and design/redesign the tools based on anthropometric dimensions and ergonomic principles. This study consisted of two phases. In t...
Background:
Office workers are at high risk of developing musculoskeletal symptoms (MSS) due to improper workstations. Open-plan bank office employees must communicate with bank clerks properly and perform financial activity precisely, but noise is a factor that disrupts their communication. Therefore, MSS and annoying noise are two of the main pr...
Introduction: Recent evidence indicates that lighting can affect physiological and neurobehavioral human functions, referred to as non-image forming (NIF) effects of lighteffects. This study aimed to determine the effects of illumination levels and correlated color temperature (CCT) on alertness and performance under NIF conditions.
Material and Me...
Introduction: Mental workload is one of the effective factors on the performance and efficiency of people working in an organization that put their health at risk. The aim of this study was to determine the mental workload of staffa working in a bank in Hamadan City of Iran by NASA-TLX method.
Methods: In this cross-sectional study, 110 bank employ...
The aim of the present study was to evaluate the combined effects of noise and air temperature on the human body neurophysiological responses. This study was conducted on 35 male students, who were exposed to four different air temperatures (18 °C, 22 °C, 26 °C, and 30 °C) and two noise levels (55 dBA and 75 dBA) in eight sessions in a simulated in...
Objective:
Crisis management in major accidents requires the collaboration among different organizations. One of the most important problems of crisis management is the lack of coordination between executive organizations. The aim of this study was to examine the structural characters and problems of interorganizational network during crisis in th...
Background: The work ability index (WAI) is a very important factor in planning a job and selecting suitable people for different occupations, and it can be affected by different factors. The aim of this study was to investigate the effect of insomnia severity on the employees’ work ability in a construction project. Methods: This descriptive-analy...
Background:
Work-related musculoskeletal disorders (WMSDs) are one of the major problems in industrial societies. An awkward posture in the workplace is considered as one main reason for these disorders. Therefore, the study and investigation of postures to improve them (in the workplace) have a significant role in appropriate intervention.
Objec...
Background:
Human error is one of the major causes of accidents in the petrochemical industry. Under critical situation, human error is affected by complex factors. Managing such a situation is important to prevent losses and injury. This study aimed to develop a dynamic model of human error assessment in emergencies in the petrochemical industry....
Background: Petrochemical industry has experienced a variety of accidents and the number of emergency situation in this industry is high. Therefore, prioritizing these situations is important. The aim of this study was to determine the effective criteria for the selection of emergency scenario and prioritize them for corrective actions. Subjects an...
Background and aims: There is always an interaction between man and his environment that can be the cause of physical, physiological and psychological stress on people and also cause discomfort, annoyance, and have direct and indirect effects on their performance and productivity, health and safety. People in their workplace are exposed to many fac...
Background: Dutch Musculoskeletal Questionnaire (DMQ) is used to examine physical and environmental risk factors and to identify high-risk groups for exposure to the risk factors of musculoskeletal disorders at workplace. The aim of this study was to develop the Persian version of the DMQ and to assess its psychometric properties.
Methods: This stu...
Background: This study aimed to investigate the effect size (ES) of air temperature on the executive functions of human brain and body physiological responses.
Methods: In this empirical study, the participants included 35 male students who were exposed to 4 air temperature conditions of 18°C, 22°C, 26°C and 30°C in 4 separate sessions in an air co...
Background and Objective: With respect to the importance of job stress in causing diseases and disorders among workers, the purpose of this study was to examine the staff's opinion on the level of implementation and prioritization of the most important stressors among Hamadan University of Medical Sciences (UMSHA) staff.
Materials and Methods: The...
Disrupting sleepiness and fatigue during the post-lunch dip by environmental factors may result in a decrease in human errors and accidents, and enhance job performance. Recent studies have shown that both red white light as well as blue white light can have a positive effect on human alertness and mental functioning. In the present study, the ligh...
There is little epidemiological data to make reliable conclusions about the effects of exposure to cold on the body’s physiological responses. The current study aimed to address this lacuna in the available research. The study sample consisted of 50 outdoor mechanic workers as a case group and 15 staff members as a control group used in the outdoor...
The purpose of this study was to investigate the physiological and mental health effects caused by exposure to low-frequency noise in typical control rooms and office-like areas. The participants were 35 male students who were exposed to noise at levels of 55, 65, 70, and 75 dBA. The N-back test was used at three cognitive performance loads (low wo...
Background and aims: 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 opera...
Background and aims: Shift work and in particular night shift work is associated with many problems such as sleep deprivation, sleepiness, decreased cognitive performance, increased human errors, and fatigue; it is also one of the major contributors of increasing the likelihood of risk of accidents in the industry. Better matching between individua...
Background and aims: taxi drivers are a large group of professional drivers, who spend so much time in driving. Considering traffic collisions as one of the Traffic Safety System in the country, modification of improper driving behaviors of this group can result in a significant decrease in accidents.
Methods: This analytical-descriptive study was...
Background:
Night shift work is associated with many problems such as sleep deprivation, sleepiness, decreased cognitive performance, increased human errors, and fatigue. This study set out to measure cognitive performance, melatonin rhythms, and sleep after different consecutive night shifts (7 vs. 4) among control room operators (CORs).
Methods...
Introduction: Muscle-skeletal disorders are one of the most common job-related disorders in industrial workplaces due to different reasons. The current study performed an ergonomic assessment using the key indicator index (KIM) in order to reduce injuries in the bottle-making salon of one of the detergent-producing industries of Qazvin province.
Me...
Firefighters perform various tasks during firefighting operations under unknown and unpredictable conditions. The present study investigated the impact of firefighting activities and cooling tactics on information processing and work performance. Firefighters performed typical firefighting tasks in the four experimental conditions, namely i) no coo...
Background: Firefighters often perform multiple tasks during firefighting operations under unknown and unpredictable conditions in hot and hostile environments.
Methods: In this interventional study each firefighters engaged in 4 conditions: namely (1) no cooling device; control (NC), (2) cooling gel (CG), (3) cool vest (CV), and (4) CG+CV. Cooling...
This study investigated the combined effect of firefighting operations and exposure to smoke on physiological responses, cognitive and physical performance among firefighters. Each firefighter was engaged in two experimental conditions: (1) without artificial smoke; control (NS) and (2) with artificial smoke (WS). The results of data analysis revea...
Background
Fire service workers often implement multiple duties in the emergency conditions, with such duties being mostly conducted in various ambient temperatures.
Methods
The aim of the current study was to assess the firefighters' physiological responses, information processing, and working memory prior to and following simulated firefighting...
Introduction: Advances in technology and the use of complex systems at work have
imposed high mental workloads to operators; so, continuous monitoring of mental
workload can help to prevent mental problems and maintain mental health. Therefore, this
study aimed to investigate the impact of mental workload on physiological and subjective
responses....
Introduction: Varicose veins in the lower limbs commonly occur in the general population and can negatively affect their quality of life. One of the high-risk jobs is the field hairdressers. The aim of this study was to investigate the effects of ergonomic interventions on quality of life of female hairdressers suffering from diseases in the lower...
Introduction:
Shoulder disorders are one of the most prevalent musculoskeletal disorders among carpet weavers. The most important cause of these disorders is muscle fatigue. The aim of the present study is to investigate the effect of carpet weaving characteristics on upper trapezius (UTr) muscle fatigue during a task cycle.
Method:
In this cros...
Background: The present study aimed to evaluate the operators’ mental workload (MW) of cement, city traffic control and power plant control centers using subjective and objective measures during system vital parameters monitoring.
Methods: This cross-sectional study was conducted from June 2014 to February 2015 at the cement, city traffic control a...
This study examined the hypothesis that burnout syndrome mediates effects of psychosocial risk factors and intensity of musculoskeletal disorders (MSDs) among hospital nurses. The sample was composed of 415 nurses from various wards across five hospitals of Iran's Hamedan University of Medical Sciences. Data were collected through three questionnai...
Introduction: Musculoskeletal disorders (MSDs) are one of the main problems in workplaces, which cause loss of working time, absenteeism, reduced workers’ efficiency and increased service and production costs. The present study was carried out to investigate the prevalence of musculoskeletal disorders and their associated risk among office workers....
Background
Musculoskeletal disorders (MSDs) are a common problem among carpet weavers. This study was undertaken to introduce affecting personal and occupational factors in developing the number of MSDs among carpet weavers.
Methods
A cross-sectional study was performed among 862 weavers in seven towns with regard to workhouse location in urban or...
Introduction: This study aimed to investigate the effect of carpet weaving at a proposed workstation on Upper Trapezius (UTr) fatigue during a task cycle. Fatigue in the shoulder is one of the most important precursors for upper limb musculoskeletal disorders. One of the most prevalent musculoskeletal disorders between carpet weavers is disorder of...
The purpose of this study was to investigate the relationship between organizational and personal (individual) factors with the prevalence of musculoskeletal disorders (MSDs) in office workers of the Iranian Gas Transmission Company. The participants rated two questionnaires: the standardized Nordic Musculoskeletal Questionnaire to measure the prev...
Background and Aim: Measurement of ground reaction forces (GRF) in different physical activities is linked with risk of the injuries of lower limb joints. Insole may alter the amount of these forces. The objectives of this study were to analyze the effects of<span style="font-family:;" dir="RTL" fa;="" 12pt;="" new="" roman";"="" "times="" roman";=...
The present study investigated the effects of mental workload levels on psychophysiological and subjective responses during n-Back task. Heart rate, heart rate variability, shoulder muscle activity, EEG and EOG were measured during performing four mental tasks by 32 males. NASA-TLX completed at the end of each mental task. Using NASA-TLX the subjec...
Shift work is a common work schedule that has several inappropriate consequences, the most important of which is fatigue. The aim of this study was to investigate the impact of the shift length on the occupational fatigue of operators in filling stations. This cross-sectional study was carried out on operators of the filling station in National Ira...
This study evaluated operators' mental workload while monitoring traffic density in a city traffic control center. To determine the mental workload, physiological signals (ECG, EMG) were recorded and the NASA-Task Load Index (TLX) was administered for 16 operators. The results showed that the operators experienced a larger mental workload during hi...
Introduction: The bank employees usually require the use of computers for long duration in a static position to get the work done. The present study aimed to evaluate the risk factors for musculoskeletal disorder using the ROSA method among the employees of Sepah Bank. An ergonomic intervention was also performed in order to improve the working con...
The complexity of modern sociotechnical systems has resulted in new challenges in the safety areas, making traditional approaches no longer sufficient. Therefore, resilience engineering (RE) is a recognizable alternative to traditional approaches in safety management. Our literature review, however, showed that most studies have focused on a set of...
Background and aims: Epidemiological studies have shown a significant correlation between awkward back posture and low back pain among carpet weavers. Therefore, this study aims for estimating cumulative compression load among carpet weavers during a shift work.
Methods: In this study, the awkward back postures of 4 male and 9 female carpet weaver...
Background & Objectives : Along with the advances in many different levels of life, interest in measuring quality of life has increased. The aim of this study was to assess quality of life in hospitals of Hamadan University of Medical Sciences.
Methods: This cross-sectional study was performed on 300 nurses in hospitals of Hamadan University of Med...
Background: In many workplaces, many factors exist as sources of stress such as environmental and physical factors, (eg, noise, overcrowding, poor lighting), human factors (conflict with another person), organizational factors (such as workload, Incorrect policy). if the person is not able to deal effectively with them, undergoing several physical...
Introduction: The analysis posture methods are counted as a source of investigating the risk of musculoskeletal disorders related to work. Personal digital assistant is a small mobile system with an operative system that can install on various programs such as posture analysis methods. Method: Firstly, three ways for posture analysis such as QEC, R...
The present study aimed to evaluate the biomechanical exposure to the trapezius muscle activity in female weavers for a prolonged period in the workstation A (suggested by previous studies) and workstation B (proposed by the present study).
Electromyography data were collected from nine females during four hours for each ergonomically designed work...
Background and purpose: The Upper Limb Disorders (ULDs) are the most prevalent types of occupational injuries, which appear following long exposure to ergonomics factors with specific repetition. The present study was aimed at assessing the upper limb disorders among assembly lines workers using Health and Safety Executive (HSE) method and and also...
Background and aims: the Car manufacturing workers due to direct exposure to machinery and wide range of ergonomic problems have high prevalence of musculoskeletal disorders rather than other industries workers. The purpose of this study was to investigate relation between pains with sick leave in an Iranian car manufacturing company.
Methods: Thi...
Background and aims: The car manufacturing workers due to direct exposure to machinery and wide range of ergonomic problems have high prevalence of musculoskeletal disorders. The purpose of this study was to investigate the relationship between pains and sick leave in an Iranian car manufacturing company. Methods: This case-control study was conduc...
Background & Objectives : High prevalence of musculoskeletal pain in dentistry represents the importance of investigation of working conditions in this profession to reduce musculoskeletal disorders.The purpose of this study was to determine the postural load on the upper limb postural using macro LUBA technique and the prevalence of musculoskeleta...
Article abstract:
Introduction: Job design approach is one of the significant concepts in ergonomics Experts believe that integration of macro ergonomics and job design can lead to improved productivity in the organizations. Therefore, this study examined the relationships between job design, performance and job satisfaction.
.
Methods and Material...
Background & Objectives: Assessment of physical risk factors related to musculoskeletal disorders is performed by different methods including observational methods. Validity of these methods are important in workplaces. The purpose of this study was to investigate the reliability of the Washington States ergonomics checklist as an observational met...
Introduction: Musculoskeletal disorders are amongst the most common occupational injuries. Prevention of workrelated
musculoskeletal disorders is of great importance among workers and has been considered as one of the national
priorities in many countries.
Materials and Methods: This cross-sectional study was performed as an intervention in a chick...
Background and Objectives: One important topic in work physiology is considering maximum aerobic power) VO2max(، which is one of the most important decision-making factors in individual fitness and in prevention of premature aging، and can play a significant role in selecting appropriate workforce. This study was done with the objective of investig...
, Introduction: Psychosocial factors present in most workplaces may be able to affect various aspects of workers’ health. Accordingly, psychosocial risks may lead to work related musculoskeletal disorders, increased risk of cardiovascular diseases, and influence the quality of working life, sickness absence, depression, work injuries and accidents...
Background and aim: Fatigue is the risk factor of musculoskeletal disorders and the aim of ergonomics is prevention from it. Decline in employee’s performance, safety and health are consequences of fatigue. The assessment of fatigue is necessary for its control. This study is going to provide valid and reliable Persian version of Swedish Occupation...
Background & Objectives: Low back pain is a major problem among industrial workers. A major part of the work-related injuries is involvement of musculoskeletal system for which about 60% is related to back pain. The aim of this study was to determine the prevalence of Low Back Pain and its association with work- and personal-related factors among w...
The purpose of this study was to investigate the effects of physical and personal risk factors on sick leave due to musculoskeletal disorders in an Iranian car company. In this cross-sectional study, 234 workers participated and all of them had sick leave due to musculoskeletal disorders in the past year. A physical risk factor checklist and person...
Manual material handling (MMH) tasks can be found in most workplaces and they may constitute a risk factor for work-related musculoskeletal disorders (WMSDs). This study was conducted to determine the prevalence of WMSDs and to compare MMH loads with the acceptable weight and force limits among Iranian casting workers. Data were collected from 50 w...