mohammad dehghanian

The present study aimed to develop a relational model of mindfulness with rumination and distress tolerance, considering the mediating role of emotional safety in adolescents with depressive symptoms. This research is classified as fundamental in terms of purpose and employs a descriptive-correlational design using structural equation modeling. The sampling method used in this study was convenience sampling, whereby 100 individuals with depressive symptoms were identified after visiting counseling and psychotherapy centers in Ahvaz and were selected to participate in the study. The participants completed the relevant questionnaires. Data were collected using the Distress Tolerance Scale by Simmons and Gaher (2005), the Rumination Scale by Morrison and O'Connor (2008), the Mindfulness Scale by Brown and Ryan (2003), and the Emotional Safety Scale by Brunner (2008). Descriptive and inferential statistical methods, including Pearson correlation and path analysis, were used to analyze the data, utilizing SPSS version 26 and AMOS software. The results indicated that the predictive model of rumination and distress tolerance based on mindfulness, mediated by emotional safety in adolescents with depressive symptoms, demonstrated an acceptable fit. This finding suggests that within this model, rumination and distress tolerance in adolescents with depression can be significantly and adequately predicted based on mindfulness. Moreover, the mediating role of emotional safety in the interaction between the predictor and criterion variables was confirmed at a significant level.

In many applications, it is necessary to transfer electrical energy to the load as a pulse with a high voltage level. Conventional switches such as semiconductors cannot be used for these applications due to voltage or speed limitations, and therefore saturable inductors must be used. These inductors act like a short circuit at the moment of saturation and play the role of a connected switch. By designing a circuit called magnetic pulse compressor (MPC), this feature can be used to produce voltage pulses with a small width and a large amplitude. The study of the structure of magnetic pulse compressor is mentioned in this article and an algorithm for its design is proposed. By using this algorithm, an efficient compressor circuit can be designed for any application and with the characteristics of magnetic materials. To show the correct operation of the algorithm, a compressor circuit sample has been designed and simulated. The output pulse of the desired circuit for a 5 Ω resistive load has an amplitude of 500 volts and a width of 500 nanoseconds. To validate the proposed method, a laboratory sample is made. The results show that the magnetic switches have an acceptable performance and the proposed algorithm is also successful in designing the compressor circuit.