مجله ارگونومی
سال چهارم شماره 3 (پاییز 1395)

work engagement is a stable and positive state of mind which is associated with work and it protects against job burnout. This study was conducted to determine the contribution of goal orientation, perceived organizational support and big five Factor personality traits in predicting job motivation of female teachers in Shahrekord.
The design of the study was correlational-survey. In addition, the sample was 230 female teachers in Shahrekord who were teaching in high school in 2013-2014. The sample of the study was selected by cluster sampling. To collect the data, Goal-orientation (VandeWalle,1997), perceived organizational support (Eisenberger, etc, 1986), Five Factor inventory (Costa and McCrae, 1985) and job work engagement (Shaufleie and Becker, 2003) were administered to the participants.
Correlation and step regression analyses were utilized to analyze the data. Findings of the study showed that there was a significant relationship among goal-orientation, perceived organizational suppor, Big Five factor personality traits and work engagement (p the present study indicated that different components of personality, goal-orientation and perceived organizational support can work engagement. These findings were discussed.

Advances in technology and the use of complex systems at work imposed high mental work load 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 work load on physiological and subjective responses.
This cross-sectional descriptive-analytic study was performed on 16 healthy university students in 1393 at laboratory setting. Physiological parameters: surface electromyography and electrocardiography in six blocks (resting, high mental work, moderate, low, very low and recovery) were measured using NeXus-4. After performing each block the NASA-TLX questionnaire was completed. The statistical analysis was conducted using SPSS software, version 21.0. A 5% significance level was adopted in all tests.
The results of t-test showed a significant difference for the average score of NASA-TLX between the different levels of mental work load (P different levels of mental work load, can impact on people's subjective responses and some physiological responses. Thus, in such workplaces, may be it was necessary to conduct an ergonomic program to manage mental health.

Shift work can lead to physiological and psycho-social problems for shift workers; it also may be effective on oral health. The aim of this research was to assess the relationship between shift work and oral health in nurses.
This cross-sectional study was carried out on 120 nurses who were working in hospital affiliated to Tehran University of medical sciences in 2014- 2015. Oral health status and DMFT index (Decayed, Missing and Filling Teeth) was performed by a dentist with clinical examination. Finally, the collected data were analyzed using SPSS 22 software through, Chi-square, Independent-Samples T-Test and multiple logistic regressions tests.
The results showed that the mean of DMFT index in shift work nurses and non-shift work nurses was 8.10±4.10, 9.41±2.8 respectively, and the mean of decayed, missing and filled teeth and periodontal DMFT index in both groups, was not significantly different. The multiple logistic regression test revealed that the age has a significant effect on the DMFT value (p This study has demonstrated that shift work is not as an independent factor affecting on oral health. However, to the mean DMFT index and nurses job responsibilities, there is a need to paying more attention the occupational group.

The progress of technology and modern technology has changed today’s workplaces and imposed more mental and cognitive demands to the workers. Control Room is an example of these workplaces. Currently, assessment of mental workload is a key point in the research and development of human-machine relationships in the workplaces. This study aims to validate an analytical approach in evaluating demanded mental workloads for control room operators in Fars combined cycle power plant.
Methods and Materials: This study is a fundamental-practical and cross-sectional study. First of all, a task analysis was used to understand the operation steps of control room operators. Then, the Visual, Auditory, Cognitive, Psychomotor, VACP, technique was applied to determine the mental workload demanded for performing each step of the works. Finally, the assigned ratings of VACP method were validated by the analysis of Pearson correlation with the answers of the NASA-Task Load Index, NASA-TLX, questionnaire collected from control room operators.
Based on the results, the correlation between the assigned ratings of VACP technique and the answers of the NASA-TLX questionnaire was positive and significant.
Due to the high correlation between the assigned ratings of VACP technique and the answers of the NASA-TLX questionnaire the proposed VACP technique which can be carried out in the early stage of the design, was suitable as an analysis tool for predicting metal workloads of control room operators.

the quality of life of nurses and nurse aides is under the influence of various factors including occupational ones which affect the quality of their services. The purpose of this research was to investigate occupational and demographic factors effective on the quality of life of nurses and nurse aides working in teaching hospitals affiliated to Kerman University of Medical Sciences.
the present research is a cross-sectional one conducted in 2014 on 620 nurses and nurse aides. Simple random sampling method was utilized. The data were collected via the World Health Organization Quality of Life short form (questionnaire). Shift-working, having a second job, marital status, length of marriage and having a shift working spouse were the independent variables of this study. The data were analyzed in SPSS 18 Software using Analysis of variance (ANOVA), Pearson correlation coefficient, Independent t and linear regression statistical tests.
the average age, length of marriage and work experience in hospital were 32.81±7.84, 10.61±7.30 and 10.29±7.68 respectively. The number of children, having a second job, satisfaction from the hours spent with family and belief in the effect of night work on family life were factors effective on quality of life (p>0.05). The highest relationship of quality of life was with environmental health (r=0.87, p=0.001) and the lowest was with social health (r=0.75, p=0.002).
avoiding to have a second job, scientific planning of shift work schedules and teachings relevant to life skills in shift workers would help improve the quality of life of nurses and nurse aides.

Musculoskeletal disorders (MSDs) are inevitable consequences of ergonomic principles neglect. Increasing use of computer by students may result these disorders. Therefore, the present study was conducted to determine the prevalence of MSDs and evaluate the effectiveness of ergonomics training intervention among University students.
This interventional and cross-sectional study was performed among a group of medical and paramedical students. Samples were chosen by simple method. In the first stage, data were gathered by means of a self-made measurement and Nordic Musculoskeletal Questionnaire (NMQ). Furthermore, an educational booklet regarding the principles of ergonomics in computer using (educational intervention) was offered to the subjects. In the second stage of the study, evaluation of the effectiveness of intervention was evaluated using a written exam and a quasi-objective structured clinical examination (quasi-OSCE) test. Data were analyzed by SPSS15, descriptive and analytical statistical indexes.
From 205 students participated in the first round of the study, results showed that 66.44% of them (128 persons) reported at least one complain or limitation in their musculoskeletal system during past year. Less than 10% of the participants were aware about the considerations of ergonomics principals during computer use. After submission of the educational materials, their awareness about the ergonomics considerations in computer use significantly improved (p Training program was effective on the awareness of ergonomics principles in computer use. However, prevention of musculoskeletal disorders requires complementary measures such as elimination of risk factors and administrative controls.

Since faculty members are among the most important assets of higher education institutes, surveying and identifying factors associated with these sources which can be effective on their performance & stress, have gained increasing importance. Accordingly, Present study was conducted to survey the relationship between personal accountability and job performance considering mediating effect of skills and job stress among employees of the University of Shiraz.
The statistical population of this study consisted all of Shiraz University staff who have a high school diploma, which included 726 patients. A sample of 256 individuals was chosen using Stratified random sampling method. The research method was descriptive-correlative. Data were collected using Hochwarter and et al (2005) accountability, job performance (1990) Paterson, House and Rizzo’s (1972) Job tension and political skills Ferris and et al (2005) satisfaction standard questionnaires. The structural equations Structural Equation Modeling (SEM) was used to study the relationship between latent variables and the measured ones in conceptual model.
Findings: The results showed that the correlation between job performance and personal accountability of employees affected an employee who is the political skills to meet her significant effect on job performance will be affected.. job tension has significant negative correlation with job performance.
According to the results, political skills and job tension affects the relation among individual accountability with job performance. The results put emphasis on the necessity of reassessing the mediating role of political skills and job tension in surveying the causal relation among individual accountability with , job performance.

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 job in 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 extremities is the varicose veins.
Material and The study population was all of female hairdressers Hamadan Mahdieh clinic were referred for medical examination. Among them simple random sampling method 70 patients suffering from varicose disease and in both cases and controls were Classification. The intervention was included Exercise protocol for varicose disease. the present study Was Quasi-experimental with pre-test and post-test and participants responded to Aberdeen varicose veins, chronic pain and muscle fatigue questionnaires that were considered as indicators of quality of working life. Data analyzed was performed by paired sample t-test using of SPSS16.
The results showed that ergonomic interventions is effective on the rate of varicose score, pain and swelling score and score muscle fatigue the left and right lower limb in case group. The average score of varicose veins, the pain and swelling and the left and right lower extremity muscle fatigue in case group respectively 2/66, 2/4, 0/75, 1/2 decreased.
With regard to the impact exercise protocol on quality of working life Barbers, the use of this protocol is recommended in patients with varicose veins.