آرمین روشن

Moral disengagement refers to the justification of harmful behavior by a person and freedom from moral standards in a specific context and time. Knowing the predictors of moral disengagement leads to a better understanding of the factors that cause it. The purpose of this research was to predict moral disengagement based on dark personality traits and belief in a just world among Marketers of Urmia city during Corona.

The design of the present study was descriptive and correlational. The statistical population included all the marketers working in the markets of Urmia in 1401, their number was 5000, and 357 people were selected using the Morgan table using the Convenience sampling method. Data collection tools were moral disengagement by Bandura, dark personality traits by Jonason & Webster, and BJW by Sutton & Douglas. Data were analyzed using Pearson's correlation coefficient and regression.

The results showed that: The dark triad of personality has a positive and significant relationship with the moral disengagement of the Marketers, and the belief in a just world has a negative and significant relationship with the moral disengagement. Also, the regression of stepwise results showed all three dark personality traits and belief in a just world are capable of explaining the general belief in a just world of marketers.

According to these results, the dark triad of personality and belief in a just world can explain moral disengagement and can be used to identify the underlying factors of moral disengagement (P= 0/05).

Vertical axis wind turbine, divided into Darrieus and Savonius, have been considered by many scientists owing to simplicity of design and operation independent of wind direction. Although Darrieus turbine has higher efficiency than Savonius, it faces to essential problem of self-starting. The aim of the present study is the combination of Darrieus and Savonius turbine in order to reach to a model with high starting torque and proper performance range. First, a model involving 3 straight-bladed Darrieus with 2 Savonius blades is simulated. For improving the performance, Savonius blade arc angle and airfoil solidity are changed. By optimizing the arc angle and solidity, the initial hybrid model performance is improved. Two-dimensional simulation using computational fluid dynamics is conducted using moving mesh for rotating part. According to results, the combination of Darrieus and Savonius turbine has favorable impact on self starting and makes performance curve smooth. It was also observed that solidity of 0.75 for Darrieus and angle of 150° for savonius blade arc are the optimized mode for maximum power coefficient, starting torque and performance range. In other words, The hybrid model with maximum performance is achieved by using these values at the same time.