• Journal of Korea Game Society
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• v.20 no.6
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• pp.31-42
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• 2020

To accept more than thousands of concurrent players, MMO Game servers should use high performance I/O APIs provided by the OS. Despite the continuous improvement of the I/O models, these new I/O APIs are not applied on the applications immediately. In this study, we proposed a new MMO game server architecture using io_uring, Linux's new I/O model. We implemented the proposed architecture and achieved performance improvements of the server on a stress test benchmark with high concurrent connections.

• International Journal of Computer Science & Network Security
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• v.23 no.8
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• pp.159-167
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• 2023

Objective: • To detect black hole and warm hole attacks in wireless sensor networks. • To give a solution for energy depletion and security breach in wireless sensor networks. • To address the security problem using strategic decision support system. Methods: The proposed stackelberg game is used to make the spirited relations between multi leaders and multi followers. In this game, all cluster heads are acts as leaders, whereas agent nodes are acts as followers. The game is initially modeled as Quadratic Programming and also use backtracking search optimization algorithm for getting threshold value to determine the optimal strategies of both defender and attacker. Findings: To find optimal payoffs of multi leaders and multi followers are based on their utility functions. The attacks are easily detected based on some defined rules and optimum results of the game. Finally, the simulations are executed in matlab and the impacts of detection of black hole and warm hole attacks are also presented in this paper. Novelty: The novelty of this study is to considering the stackelberg game with backtracking search optimization algorithm (BSOA). BSOA is based on iterative process which tries to minimize the objective function. Thus we obtain the better optimization results than the earlier approaches.

• Journal of Internet Computing and Services
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• v.14 no.5
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• pp.101-117
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• 2013

As the number of online game user has been rapidly increased thanks to the recent vitalization of online contents market, not only new business opportunity but also the opportunity to create high profits have been provided as well. However, the increase of the number of online game user and the rapid expansion of the market evoke a cutthroat completion among online game service providers, and also high barriers to entry to online game market have been erected. Thus, what kinds of efforts need for the business success and sales increase in online game market? In lots of researches regarding online contents business, the deepening of loyalty was considered as a critical factor for the business success. According to the study on user's behavior in online environment, users would experience the Flow while using online service, and then, if they were in state of the Flow, they would use the service constantly. High customer loyalty to online game means high will to use the online game too. The purpose of this research was i) to examine what factors enable users to be naturally immersed in online game while playing it, ii) to examine what properties of online game can make game more interesting and exciting, iii) to verify that such factors are critical in deepening customer loyalty, and iv) to suggest some essential factors to be fun and exciting games, on where the focus should be put, and the directionality for the development for sales expansion of online game developer or online game service provider. The research results are as below: First, the involvement and the perceived quality which were characteristics of brand appeared to be factors most affecting Flow. This shows that once game user get interested in online game that user has played frequently, even though new games are released, user will continuously flow the game not moving to new games, and also shows that users not only get more interested but also put more trust in games in the site to where users are frequently going than games in other sites, and consequently user can increasingly flow the game. Second, the compensation and graphics which are the characteristics of contents appeared to be factors affecting Flow. Proper compensation which is given to game users triggers fun and interests in game and makes them flow more and more. And graphics make users to feel game space as if real space and let them flow in game with more reality. Third, challenges, support, and the stability which are technical characteristics appeared to be factors affecting Flow. Challenges enable users to not only experience new virtual world but also solve various difficulties and obstacles. Once users feel fun and interests through this challenge, they can naturally flow games. In addition, the stability of network provides reliability in security and hacking. By doing so, it can induce users to flow more and more. Lastly, when aforementioned characteristics including contents characteristics, technical characteristics, and brand characteristics are organically combined each other, game users feel fun and total minutes are naturally increased, so that game users experience Flow, and consequently the customer loyalty will be deepened as well.

• Journal of Digital Convergence
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• v.15 no.9
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• pp.415-425
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• 2017

The purpose of this study is to examine the effect of perceived enjoyment and user's characteristics on the intention of continuous use when users play social network games on a mobile device. In addition, the study empirically investigated the mediating effect of flow experience in this process. To fulfill the purpose, this study conducted a survey on 244 college students and collected data. When the collected data was analyzed, the followings were known. First, perceived enjoyment, and both self-efficacy and innovation propensity of user's characteristics turned out to have a positive (+) effect on the intention of continuous use in mobile social network game. Second, in the process, it was known that flow experience played a mediating role. These findings are expected to be useful data in developing game contents of high quality or making a marketing strategy for continuous improvement of online social network game industry. In addition, future studies are expected to generalize the research to various age groups.

• Journal of Korea Game Society
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• v.12 no.1
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• pp.15-24
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• 2012

Serious games are purposive game. So game-developers want to achieve the desired purposes, and game-users also want to play to achieve the goals of playing games. The function of achievement-assessing is an important area of serious game. In this study, achievement-assessing style was defined as three types, that is, 'all-in-one', 'complex', and 'separation'. Accordingly, we analyzed which type of serious games use which type of achievement-assessing style. As a result, the survey shows that those who want to play game itself preferred 'all-in-one' above all, and those who want to stick to the purpose of game preferred 'separation' or 'complex'. In addition, the investigation of preference of achievement-assessing function shows that users, as a whole, preferred 'all-in-one'. We hope this study will be useful data to design of achievement-assessing function which achieve the purpose of game and provide users with higher satisfaction.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.5
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• pp.1115-1122
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• 2015

In recent years, the use of game bots by illegal programs has been expanded from individual to group scale; this brings about serious problems in online game industry. The gold farmers group creates an in-game social community so-called "guild" to obtain a large amount of game money and manage game bots efficiently. Although game developers detect game bots by detection algorithms, the algorithms can detect only part of the gold farmers group. In this paper, we propose a detection method for the gold farmers group on a basis of normal and bot guilds characteristic analysis. In order to differentiate normal and bots guild, we analyze transaction patterns for individuals, auction house and chatting. With the analyzed results, we can detect game bot guilds. We demonstrate the feasibility of the proposed methods with real datasets from one of the popular online games named AION in Korea.

• Research in Community and Public Health Nursing
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• v.15 no.3
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• pp.460-470
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• 2004

Purpose: The purpose of this study is to find which variables among impulsiveness, aggression, and emotional intelligence can predict the game addiction of elementary school students best. Method: We conducted the present study during the period from April 15, 2004 through June 5, 2004. The subjects of this study were elementary school students chosen from three elementary schools in the Daejeon area. The subjects were selected randomly from 4th, 5th, and 6th graders in those schools. The number of subjects selected was 601. The measurement tools used were the general information questionnaire, computer game addiction scales, impulsiveness scales. aggression scales, and emotional intelligence scales. The data was analyzed using the SPSS statistics program. Results: The mean score of the students was 49.94 on the computer game addiction scale. 56.17 on the impulsiveness scale, 141.19 on the aggression scale, while the mean score of the students on the emotional intelligence scale was 162.78. Various factors were significantly different in the levels of computer game addiction: grade (F=7.343. p=.000). sex (t=6.352. p=.000), school record (F=4.263. p=.004), parents' computer use (F=4.097. p= .008), history of playing games (F=10.739. p=.000), frequency of playing games (F=61.254. p=.000). and number of computer game titles (F=61.673. p= .004). The computer game addiction had significant correlations with impulsiveness (r= .401. p=.000), aggression (r=.612. p=.000). and emotional intelligence (r=.536, p=.000). All three factors of impulsiveness, aggression, and emotional intelligence affected the level of game addiction. Among these factors. the aggression affected the level of addiction the most. Conclusion: These results will help the development of a systematic program for the prevention and treatment of computer game addiction by clarifying the effects of the computer game addiction upon the elementary school students' impulsiveness, aggression, and emotional intelligence.

• Journal of Korea Game Society
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• v.15 no.6
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• pp.65-76
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• 2015

This study attempts to investigate the parent's perception types of online game and their related factors. The data was collected through the online survey from 485 parents. As a result, the parent's perception types of online game were classified as 4 types. Each perception type shows differences in an attitude and reaction to online game and gender. Next, this study employed a multinomial logistic regression model to examine variables influencing the parent's perception types of online game. The result shows that parent's gender, controlling parental style, and problematic communication have statistically significant effects on the parent's perception types of online game. This study holds its significance in considering the game use of children in the context of parent-child relationship by exploring the parent's perception of online game and its influencing variables.

• Journal of Society of Preventive Korean Medicine
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• v.19 no.2
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• pp.159-167
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• 2015

Objective : Recently many kinds of food therapies have sprung up to prevent or manage disease and to promote health. Seeing Korean history, the Korean medical doctors have been applying food therapy based on the thought that the dietary sources were as important as the medicine. Therefore, in this study, we designed a mobile edutainment game prototype with the goal of providing education about healthy food knowledge for users who belongs to different constitutional types. Materials and Method : We adopted the Sasang Constitutional Medicine as the medical background knowledge for our edutainment game design. Based on the user study, we developed the process of edutainment system which is composed of 'My game', 'My constitution', and 'My food'. Among the whole process, we developed a prototype for the core module - the 'My game' part. This prototype used a jumping game for mobile devices that is composed of training, level 1 and level 2 stages. Results : From the target user evaluation, it was proved that 1) in terms of the learning effect of healthy diet, the edutainment game we developed has a significant advantage over the conventional learning media. 2) after playing the edutainment game, the good and bad food identification accuracy based on picture and text format were increased by 44% and 42% respectively, and 3) target users perceived enjoyment while using this prototype, as well as showed positive intention to use this game as edutainment tool in the future. Conclusion : We designed and developed mobile edutainment game prototype to educate healthy food knowledge based on Sasang Constitutional Medicine. Through user evaluation, we proved that our prototype enhanced healthy food knowledge and that user accepted the prototype as a beneficial edutainment tool.

• Information Systems Review
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• v.7 no.1
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• pp.41-63
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• 2005

Due to the fast development of information technology, a variety of edutainment software has been used in the field of business education. One of them is Business Simulation Game that the business game domain and the information technology is definitely associated. A lot of business simulation game have been developed and used for many courses of colleges and corporate training in USA and EU. However, education program based on business simulation game has not been activated in Korea. This paper introduce a business simulation game developed by joint effort of business professors and a software firm for last three years and suggest the method of business education using this business simulation game. First of all, the development process, architecture and procedure of business simulation game are summarized. From a perspective of business education, the effect and advantage of business simulation game, sample syllabus, course outlines, users, missions and evaluation method are also addressed.