• Korean Journal of Child Studies
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• v.28 no.3
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• pp.133-148
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• 2007

The 90 children in this study were grouped with 30 each in the experimental group, and the 2 comparison groups. Research methods over 8 weeks were in the sequence starting from teacher/assistant teacher education, then pretest, followed by development-adaptation of experimental model of math games, and post-test. The experimental group conducted child-initiated math games, comparison group I children proceeded with teacher-initiated math games, and comparison group II children proceeded with co-initiated math games. Statistical evaluation was by ANOVA and ANCOVA. Findings were that the child-initiated math game group scored higher on children's mathematical ability than the two comparison groups. Boys in the experimental group scored higher on children's mathematical ability than girls.

• The Transactions of the Korean Institute of Electrical Engineers A
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• v.55 no.6
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• pp.259-264
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• 2006

This paper addresses the collusive bidding that functions as a potential obstacle to a fully competitive wholesale electricity market. Cooperative game is formulated and the equation of its Nash Equilibrium (NE) is derived on the basis of the supply function model. Gencos' willingness to selectively collude is expressed through a bargain theory. A Collusion Incentive Index(CII) for representing the willingness is defined through computing the Gencos' profits at NE. In order to keep the market non-cooperative, the market operator has to know the highest potentially collusive combination among the Gencos. Another index, which will be called the Collusion Monitoring Index(CMI), is suggested to detect the highest potential collusion and it is calculated using the marginal cost functions of the Gencos without any computation of NE. The effectiveness of CMI for detecting the highest potential collusion is verified through application on many test market cases.

• Korean Journal of Child Studies
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• v.18 no.2
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• pp.105-120
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• 1997

The purpose of this study was to investigate children's abilities of self-control and visual information processing based on their experience with video games. Participants, divided by prior exposure to video games, were 44 seven-year-old and 48 eleven-year-old boys. The impulsive tendency of children was measured through the MFFT and The delayed satisfaction test. Visual information processing ability was assessed through perceptual speed, mental rotation, and spatial visualization tasks. No differences were found between more-and less-video-game-experienced boys. Significant differences, however, were found in visual information processing abilities. More experienced boys performed better in mental rotation and spatial visualization tasks than less experienced boys.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.347-348
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• 2019

대학의 게임개발 프로젝트에서 게임QA를 수행할 때 일정한 가이드라인이 없이 진행되는 경우가 많다. 게임QA 중 소프트웨어 테스팅 부분은 최근 확정된 ISO/IEC/IEEE 29119 표준을 기준으로 할 수 있을 것이다. 다만 29119 표준의 내용이 매우 구체적이므로 이를 대학의 학기라는 제약에 맞춰서 진행하기 위해서는 표준이 제시하는 프로세스에 대한 최적화 과정이 필요하다. 본 논문에서는 ISO/IEC/IEEE 29119 표준을 간략하게 살펴보고 이중 테스트 계획 수립 프로세스를 어떻게 최적화할 수 있는지 방안을 제시하였다.

• Journal of Korea Game Society
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• v.21 no.1
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• pp.91-98
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• 2021

In this paper, we propose the system that simultaneously controls objects in virtual reality and objects in real environments using brain waves. We propose a system that measures brain waves to grasp the user's concentration and quantifies them to raise or lower virtual and real objects. We implemented a web-based virtual reality system and an embedded system based on a raspberry pi for test of design. It was confirmed that the control of virtual and real objects is possible using BCI. The result was that it was possible to develop various contents using this.

• Korean Journal of Adult Nursing
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• v.17 no.1
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• pp.44-55
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• 2005

Purpose: The purposes of this study were to examine the effects of recreational therapy (60 minutes * 3times/week * 6weeks) on dementia behavior & affection, and activity of daily living of senile people with dementia. Methods: The subjects were 27 senile people with dementia, 16 experimental group, 11 control group, admitted at K hospital in Chungnam province in quasi-experimental study. The recreational therapy program was developed, based on the recreational program for senile welfare made by athletics science research institute in Chungnam National University(1997). It consisted of rhythm game, ball play, and beanbag game. The data were collected through questionnaires from May 1st to June 10th 2003 and were analyzed using descriptive statistics, ${\chi}^2$-test, Fisher' exact test, and Man Whitney U test. Result: The dementia behavior and affection score was significantly different between the two groups (U=32.5, p=.005). The ADL score was significantly different between the two groups (U=12.0, p=.000). There were significant decrease in dementia behavior & affection, and improvement in ADL in the experimental group compared to the control group. Conclusion: Recreational therapy intervention was proved effect in decreasing dementia behavior & affection and promoting ADL of senile people with dementia. We recommended re-test in containing a communicating variable.

• Journal of Korea Game Society
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• v.12 no.2
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• pp.3-14
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• 2012

As one of elements to be able to endow more exciting and higher degree of completion for game, the feeling of hit is realized by image, sound and body-sensing (vibration) effects. When the feeling of hit is realized by game developer, most proper effects will be chosen with regard to genre, system and standpoint of world for the game. In general, most of choices for the effects are performed by the experience of game developer or referring the other games. Nevertheless the related studies are not significant in comparison with the importance for the feeling of hit, and the fundamental studies are mostly not accomplished. This paper introduces a study on efficiency and important factors for the feeling of hit by analyzing the properties and degrees of feeling for all effects to represent the feeling of hit through experiments. For this, a software simulator was implemented to test all effects and therewith the final results are presented through questionnaires for the feeling of hit sent to gamers. Our results are expected to be used to accomplish higher degree of completion for mobile games or web games with limited resources.

• Journal of Korea Game Society
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• v.7 no.3
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• pp.67-76
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• 2007

As the performance of game consoles is so highly progressed that services such as internet browsing become available on the consoles, the need for text input schemes on game consoles is rapidly raised. In this paper, we present a text input method of alphabet characters and several symbols using a gamepad, which is a widely used input device for most game consoles. Just like other text input methods using gamepad, our method allows users to enter texts by manipulating the gamepad with a user interface displayed on the screen of the console. A key idea of this paper is to present the user interface that is similar to the $4{\times}3$ keypad on mobile phones. The motivation of this idea is a principle that the experience of using a text input tool can be transferred to another tool that has similar interface. Another motivation is that the keyboard-based interface is too complex to be easily manipulated by simple input from a keypad, which is four orthogonal directions and several fire signals. Since most of keys on keypad of $4{\times}3$ keys are represented by a combination of two orthogonal directions, users feel easier in entering texts using keypad-based interface. We prove this argument in this paper by a user test of ten subjects. After about two experiment sessions, subjects reach 13 WPM in average, which proves that the proposed text input method enables much faster text input than the existing keyboard-based text input methods.

• Survey Research
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• v.4 no.2
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• pp.63-86
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• 2003

The objective of this study was to investigate the existence of starting point bias in the bidding game contingent valuation elicitation technique when determining willingness to pay (WTP) for improving the qualify of running water in Seoul and its vicinity. Of all existing contingent techniques, the bidding game most closely mimics the normal price taking behavior in local markets. Three different starting points (low, medium and high) were used to determine WTP and the existence of starting point bias in the meanwhile respectively. The respondents were randomly assigned to the three different starting point groups in order to ensure homogeneity, so that any variation seen in WTP could be attributed to the starting point effects. And a pretested interviewer-administered questionnaire used to elicit WTP. Non-parametric test and the logit model were used to analyze the data for evidence of starting point bias. In this instance, the high starting point group had a high WTP, and low starting point group had a low WTP. This means there exist starting point bias in estimating WTP by bidding game in this instance. This finding might signal that people may actually be making up their minds on the maximum amount they are willing to pay for running water service as a bidding iterating is going on and is influenced by the starting point used in the bidding game. The problem of slaking point bias can be avoided if the respondent is asked directly for the maximum WTP without payment cards or a bidding game. But such a question is perceived as being very difficult to answer and this leads to problems of non-response and being unrealistic.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.2
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• pp.755-759
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• 2012

In this paper, it is about random number generator, which is based on hardware is utilized in medical science and game area. The Intel presents guideline of security level about hardware based true random number generator. At hardware based random number generator, the various test items, that are included in test suits as NIST statistical test, FIPS140-1, is applied. In this paper, it experiments about degree extent of randomness variation from filter scheme effects, which is applied in output stream of hardware noise source.