Objective: Traumatic experiences are a significant risk factor for psychological disturbances, including disorders such as complex posttraumatic stress disorder, emotion-processing problems, and trauma-related dissociative experiences. The present investigation examined the coexistence of these symptoms using a network analysis model.Method: This study included a sample of 406 people referred to comprehensive health centers in Tehran from September to December 2023 with psychopathological syndromes. Variables were assessed using The International Trauma Questionnaire, International Measurement of Exposure to Traumatic Event checklist, Baker Emotional Processing Questionnaire, and Dissociative Experiences. A regularized partial correlation network and Glasso algorithm, in combination with Extended Bayesian information criteria, were applied to estimate the network structure.Results: Signs of unprocessed emotions and disturbance in self-organization symptoms were the most important symptoms in the symptom network, forming strong connections with other nodes. Thereby, these two symptoms can be regarded as the most important clinical manifestations in the symptom network following traumatic experiences. Three distinct symptom communities were identified: the community of traumatic experiences (childhood, adolescence, adulthood), the community of dissociative experiences (amnesia, depersonalization/derealization, and absorption), and the community of emotional processing (suppression, unpleasant emotional experience, Signs of unprocessed emotions, avoidance, and emotional control, posttraumatic stress disorder symptoms and disturbance in self-organization symptoms). The strongest edges observed were between childhood trauma-adolescence trauma (0.473) in the community of traumatic experiences, between amnesia and depersonalization/derealization (0.644) in the community of dissociative experiences, and between disturbance in self-organization symptoms and unprocessed emotions (0.324) in the community of emotional processing, indicating the recurrent occurrence of these symptoms.Conclusion: In this study, disturbance in self-organization symptoms was identified as the central psychopathologic symptom in individuals experiencing traumas at different developmental stages. It seems that adolescent trauma and not childhood trauma plays a more decisive role in the symptoms that a person manifests after traumatic experiences. Also, posttraumatic stress disorder symptoms and disturbance in self-organization symptoms were recognized in the cluster of emotional processing symptoms and can have substantial roles in prioritizing therapeutic measures.

Background: Complaints of the arm, neck, and shoulder (CANS) in the workplace are becoming more prevalent among employees. The Maastricht Upper Extremity Questionnaire (MUEQ) validates upper extremity complaints in 7 domains—including workstation, body posture, break time, job control, job demands, work environment, and social support. The aim of the present study ...

Background: The present research aimed at determining the reliability and validity of the Persian version of the Emotional Self-Efficiency Scale (ESES) for adolescents of Isfahan city. This study was conducted using a developmental research method. The statistical population consisted of all the first-grade high school students of Isfahan city in 2018 (n=59396). Methods: A total number of 280 students (160 girls and 120 boys, mean±SD age of 12.98±1.14) were selected using a stratified random sampling method, and completed ESES for adolescents (2015), as well as Self-Efficacy Questionnaire for Children (2001). Results: An Exploratory Factor Analysis (EFA) revealed the four-factor structure of ESES. A Confirmatory Factor Analysis (CFA) also confirmed the fit of the four-factor structure of the scale. The results of the within-group correlation coefficient were obtained to investigate the acceptable test-retest reliability. The results of the correlation between the above-mentioned scale and SEQ-C instrument was also significant (P<0.05). Moreover, ESES and its dimensions had proper reliability over time. The reliability obtained by Cronbach’s alpha for all four dimensions of the questionnaire, given the number of items, was higher than 0.5 for each dimension and higher than 0.7 for the whole scale, which was acceptable. Conclusion: These findings indicate the acceptable validity and reliability of ESES for Isfahan’s adolescents, and its validity and reliability should be investigated in broader research on Iranian children and adolescents.

Background and purpose: Vibration caused by ventilation systems in buildings is one of the harmful physical factors that can cause harm to residents. Therefore, measuring and controlling vibration is important. Materials and Methods: In the first step of the study, the vibration accelerometer was placed on the base of a fan where the vibrations were sent toward the duct wall. A vibration assessment of the building was conducted in the other steps to compare with guidelines. In the next step, isolation method was used to control vibration. By placing the isolator on the duct wall, the accelerometer was located on the body of the duct wall and the value of vibration was measured in a millimeter per second. All stages of the experiment were performed in the Faculty of Health of Isfahan University of Medical Sciences in 2018. Results: The maximum vibration velocity reduction in the building was related to the frequency of 68 Hz, which reached 33 mm/s after isolation. In addition, the fan vibration at 485 Hz was equal to 2.1 m /s, which decreased to 2 mm /s after isolation. Conclusion: Comparison of vibration after fan isolation with standard showed that this method has been effective in reducing the fan vibration resulting in the vibration to reach below the standard.