Research on gamifi cation shows that it has positive impacts on learning, performance, motivation, and engagement. To have a big picture on gamifi cation research in higher education, a combination of bibliometric and thematic analysis was conducted. For this study, a total of 432 documents from 2010 to 2020 which have been indexed in Web of Science database are investigated. Additionally, the researchers analyzed a group of 10 articles to review how much contribution they had to the body of research. General tendencies in the way gamifi cation has been changing or developing in academic literature were scrutinized from the perspective of a variety of diff erent factors including the time the works were published; the areas of the research fi eld; and the authors, organizations, countries, and co-authorship publishing the most number of works in the issue. Th e possible future applications and results for educational organizations and academicians, top academic decision-makers, and educationists are discussed.

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The growing penetration of distributed energy resources (DERs) has increased the complexity of the power system due to their intermittent characteristics and lower inertial response, such as photo voltaic (PV) systems and wind turbines. This restructuring of power system has considerable effect on transient response of the system resulting in inter area oscillations, less synchronized coupling and power swings. Furthermore the concept of being distributed itself and generating electricity from multiple locations in power system makes the transient impact of DERs even worse by raising issues such as reverse power flows. This paper studies some impacts of the changing nature of power system which are limiting the large scale integration of DERs. In addition a solution to increase the inertial response of the system is addressed by adding virtual inertia to the inverter based DERs in power system.The proposed control results in increasing the stability margin and tracking the rated frequency of the system. The injected synchronized active power to the system will prevent the protection relays from tripping by improving the rate of change of frequency. The proposed system operation is implemented on a sample power grid comprising of generation, transmission and distribution and results are verified experimentally through the Opal-RT real-time simulation system. Index Terms-power system stability,distributed energy resources, photo voltaic system, virtual inertia, rate of change of frequency.

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