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The purpose of this study was to explore the influence mechanism of challenging and threatening work stress on employees' innovative behavior, and to examine the mediating role of psychological distance and the moderating role of employment relationships. A web-based survey of 498 employees
was conducted. The main findings were as follows: (a) Challenging stress had a significant and positive impact on innovative employee behavior, whereas threatening stress negatively affected innovative employee behavior, (b) psychological distance mediated the relationship between both challenging
and threatening stress and employees' innovative behavior, and (c) the employment relationship positively moderated the relationship between challenging stress and employees' innovative behavior and negatively moderated the relationship between threatening stress and employees' innovative
behavior. Implications are pointed out and suggestions provided for management personnel who are searching for ways to encourage employees' innovative behavior in firms where there is work stress.

Since the global financial crisis in the first decade of the 21st century, ethical leadership has emerged as a form of organizational management that promotes employee well-being, positive citizenship behaviors, and innovation. In this study, we examined the relationship between ethical
leadership and employee creativity in Chinese businesses. We hypothesized the mediating roles of psychological empowerment and willingness to take risks in the relationship between ethical leadership and employee creativity. Survey data were collected from 380 employee–supervisor pairs
working in 8 businesses across 5 sectors of the economy. The results indicated that, as hypothesized, a positive relationship exists between ethical leadership and employee creative behaviors. Psychological empowerment and willingness to take risks were found to partially mediate this relationship.
The theoretical and practical implications of the findings are discussed.

Natural circulation is an important process for primary loops of some marine integrated reactors. The reactor works under inclined conditions when severe accidents happen to the ship. In this paper, to investigate the characteristics of natural circulation, experiments were conducted in a symmetric loop under the inclined angle of 0~45°. A CFD model was also set up to predict the behaviors of the loop beyond the experimental scope. Total circulation flow rate decreases with the increase of inclined angle. Meanwhile one circulation is depressed while the other is enhanced, and accordingly the disparity between the branch circulations arises and increases with the increase of inclined angle. Circulation only takes place in one branch circuit at large inclined angle. Also based on the CFD model, the influences of flow resistance distribution and loop configuration on natural circulation are predicted. The numerical results show that to design the loop with the configuration of big altitude difference and small width, it is favorable to reduce the influence of inclination; however too small loop width will cause severe reduction of circulation ability at large angle inclination.