Background: Although many studies have addressed COVID-19, the challenges faced by nurses in their workplace after recovering from this disease have not been investigated. As the backbone of the health system and at the forefront of the fight against COVID-19, nurses are exposed to serious risks of infection and even death. They may also face numerous challenges in their workplace after recovering from COVID-19. It is therefore ethically recommended that the problems of these nurses be solved to increase their job (...) satisfaction and encourage them to remain in their profession. Objectives: The present research was conducted to determine the workplace challenges faced by nurses who had recovered from COVID-19. Methods: This qualitative study was conducted using the interpretive phenomenological approach proposed by van Manen. The data collected through 17 in-depth semi-structured interviews with 14 eligible nurses at different occupational levels were analyzed using the six steps proposed by van Manen. These nurses had also recovered from COVID-19. Ethical considerations: This study was approved by the Ethics Committee of Urmia University of Medical Sciences. Findings: Four themes and 20 subthemes extracted from analyzing the data explained the challenges faced by the nurses after their return to work. The themes included declined ethical values, infected nurses, forgotten patients, gradually leaving the job, and corona phobia. Conclusion: The present findings can be used to lay the foundations for adopting humanitarian policies in health organizations in terms of ethical care provision during future pandemics. (shrink)

Subjects can be assumed as phenomena possessing independent axes on which intellectual and material achievements are deployed into a network of interconnections that, centered on certain axes in specific place and time, may give rise to a series of subjects or may transform into turning points that inevitably lead to dimming or elimination of a range of issues and bring about significant changes and developments in another broad range of them. Phenomena such as local governments/states formation or collapse, industrial revolution, (...) and other phenomena such as new civil laws, the press, public education, etc., in any given period can be new issues affecting the situation before and after them, transforming into turning points and/or serving as axes for other subjects. By identifying a network of such subjects, we will be able to understand their process of formation, evolution and variation within the scope of local histories. (shrink)

In recent years, social networks have made significant progress and the number of people who use them to communicate is increasing day by day. The vast amount of information available on social networks has led to the importance of using friend recommender systems to discover knowledge about future communications. It is challenging to choose the best machine learning approach to address the recommender system issue since there are several strategies with various benefits and drawbacks. In light of this, a solution (...) based on the stacking approach was put out in this study to provide a buddy recommendation system in social networks. Additionally, a decrease in system performance was caused by the large amount of information that was accessible and the inefficiency of some functions. To solve this problem, a particle swarm optimization algorithm to select the most efficient features was used in our proposed method. To learn the model in the objective function of the particle swarm algorithm, a hybrid system based on stacking is proposed. In this method, two random forests and Extreme Gradient Boosting had been used as the base classifiers. The results obtained from these base classifiers were used in the logistic regression algorithm, which has been applied sequentially. The suggested approach was able to effectively address this issue by combining the advantages of the applied strategies. The results of implementation and evaluation of the proposed system show the appropriate efficiency of this method compared with other studied techniques. (shrink)

In this paper, we define the notion of PC-lattice, as a generalization of finite positive implicative BCK-algebras with condition and bounded commutative BCK-algebras. We investiate some results for Pc-lattices being a new class of BCK-lattices. Specially, we prove that any Boolean lattice is a PC-lattice and we show that if X is a PC-lattice with condition S, then X is an involutory BCK-algebra if and only if X is a commutative BCK-algebra. Finally, we prove that any PC-lattice with condition is (...) a distributive BCK-algebra. (shrink)