• The Journal of Society for e-Business Studies
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• v.26 no.3
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• pp.55-66
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• 2021

The mobile application (APP) market is growing at an unprecedented speed. Amid such growth, the global platform providers are mandating exclusive in-app payments and charging 30% for platform commission fees. A serious tension has arisen between mobile global platform providers and local content providers. The present study attempts to analyze the domestic mobile game market and in-app payment commission fees. This study estimates the size of the domestic mobile game market and platform commission fees by directly using publicly available financial statements and footnote information of some representative listed mobile game firms. Also, the study analyzes the cost structures of the same sample firms and attempts to draw some implications on sustainable growths of the mobile game ecosystem. We estimated that, in 2019, the domestic mobile game market is around 4.9 trillion Won and the ensuing in-app payment commission fees market was 1.5 trillion Won. High market share firms display a proportional increase in in-app payment commission fees in relation to sales growth. This, in turn, makes the in-app payment commission fees a primary cost item far exceeding employee salaries and R&D expenses. During the same period, low market share firms generated a mere profit or experienced net loss. Analysis of the cost structure reveals that these firms are even more liable to higher in-app payment commission fee cost structure than high market share. Most constituents of the mobile game ecosystem are small business entrepreneurs. By employing a micro-level analysis, the study estimates that, in 2019, a representative median firm generates 530 million Won in sales. At the same time, it spends 190 million Won in employee salaries, 50 Won million in R&D and 190 million Won in in-app payment commission fees, respectively. In the absence of other cost items, these three cost items alone account for 73.8% of sales revenue. The results imply that a sustainable growth of the local mobile game market heavily depends upon the cost structure of such representative median firm, the in-app payment commission fees being the primary cost item of such firm.

• The Journal of the Convergence on Culture Technology
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• v.10 no.4
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• pp.383-388
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• 2024

This study conducted voluntary focus group user observations to empirically validate the efficacy of the self-developed psychological support mobile application, "Mindful Now". The app is structured as an interactive game format, enabling individuals to activate self-awareness of mindfulness states anytime, anywhere. It consists of a 3-step process of sensory/emotional/consciousness awareness, facilitating the expression of non-judgmental awareness. To demonstrate the effectiveness of this mindful activation in enhancing psychological well-being such as happiness and stress reduction, voluntary mindfulness mobile app usage was tracked among 49 university students. The results revealed significant improvements, with a 14.4% increase in SWLS happiness index and a 17.1% decrease in PSS-10 stress levels among 12 users who used the app continuously for over 60 days to practice mindfulness awareness. Particularly, higher app engagement was observed among students who initially reported relatively lower indices before using the app. The utilization of mobile apps that promote mindful activation aligns with various therapeutic paradigms based on mindfulness and meditation, contributing to advancements in digital therapeutic interventions for psychological support.

• Journal of Industrial Convergence
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• v.20 no.3
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• pp.63-71
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• 2022

This study attempted to investigate the effect of 'RolyPoly 160' on the self-care of diabetes in the community. The experimental group was 60 diabetes living in estern region, G-Metropolitan City, and 'RolyPoly 160' was used more than 5 times a week within 5-10 minutes for 12 weeks. The control group was a resident in the western region, and once received a group lecture in the beginning of the experiment, The study period was from July 1 to September 20, 2019. Self-care tests were conducted before and after the study. The collected data was analyzed with frequency analysis, descriptive statistics, independent sample t-test and cross-tabulation analysis. In the experimental group, drug therapy, foot care, exercise therapy, and diet self-care were statistically significantly increased than before the experiment. Therefore 'RolyPoly 160' can be used as a nursing intervention program to help diabetic patients perform self-care in the future.

• Journal of Korea Game Society
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• v.20 no.3
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• pp.35-44
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• 2020

In this study, we propose a reliable command placement recognition algorithm using tangible commands blocks developed for our coding puzzle platform, and present its performance measurement results on an Augmented Reality testbed environment. As a result, it can recognize up to 30 tangible blocks simultaneously and their placements within 5 seconds reliably. It is successfully ported to an existing coding puzzle mobile app and can operate an IoT attached robot via bluetooth connected mobile app.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.147-154
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• 2012

I made an analysis on the case of Kakao Talk, which is Korean top mobile instant messaging service, to find the growth potential of Korean Social Network Service in the global market. First, I found that unlike the PC messenger services, Kakao Talk is not only unlimited in mobile IM service provider but also has evolving into a social network service firm. Second, attempts with a variety of social services such as photo-based Kakao Story and Marketing Platform for Mobile Game, Kakao Talk successfully landed as a SNS company. Third, with 'Plus Friends' Service, soon-to-be launched Avatar and App Market Service, Kakao Talk is evolving into social media and social platforms. The big success of Kakao Talk in Korean market is expanding and reproducing into Japanese and Southeast Asian markets through the 'Line' serviced by NHN. Line is applying the proven success stories of Kakao Talk to the Japanese and Southeast Asian markets. It means that Kakao and Line, both are mobile IM services, have raised the possibility of success in the global SNS market although online web-based SNS Cyworld has failed in the global market.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.52-53
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• 2013

스마트 기기와 안드로이드 플랫폼의 급속한 보급은 모바일 애플리케이션들의 개발을 촉진하고 있으며, 게임, 소셜 네트워크 서비스 (SNS), 교육 등 다양한 도메인 분야에서 애플리케이션들이 개발되고 성공적인 사례도 발표되고 있다. 이동통신 칩과 결합된 GPS 수신기가 휴대폰 및 대부분의 스마트기기에 장착됨에 따라 위치 정보에 기반한 다양한 서비스가 활용되고 있다. 본 논문에서는 위치정보와 소셜 네트워크 서비스를 결합하여 가입자간 정보 공유 및 커뮤니케이션, 검색, 위치정보 등 다양한 비즈니스에 활용될 수 있는 위치기반 SNS 앱의 설계를 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.409-411
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• 2020

4차 산업 시대의 흐름에 따라 디지털 문화유산 컨텐츠의 생산이 이루어지고 있다. 문화재의 위치와 해설을 사용자에게 제공하거나 문화재 사진을 보고 이름을 맞추며 간략한 정보를 얻는 등 학습을 위한 어플리케이션이 제작되고 있으나 사용자 경험을 고려한 지속적 교육 컨텐츠의 개발은 부족한 상황이다. 이에 따라 본 논문에서는 게이미피케이션을 통해 사용자가 문화재에 대한 정보를 지속적으로 학습할 수 있는 모바일 어플리케이션을 제안한다. 사용자의 흥미를 동반하여 학습을 이어가기 위해 수집형 롤플레잉 게임 시스템을 응용하고 이를 크게 네 가지의 항목으로 세분화하였다. 이 연구를 통해 우리 문화유산을 활용한 지속적 교육 컨텐츠 개발에 기여하길 기대한다.

• Journal of Korea Game Society
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• v.10 no.6
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• pp.137-146
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• 2010

According to rapid advent of the smartphone, software technologies which have been used on PCs are being introduced into the smartphone. This paper introduces an implementation of an application software under the Android platform using morphing and warping technology. It composes two face images with morphing technology and also transforms an original face image using warping technology for fun. For this, the image is triangulated by Delaunay Triangulation based on control points which are created by simple LCD touches on the mobile device. The implementation case of this paper will be a good reference for the development of applications like games using morphing and warping technologies over Android platforms.

• Journal of Korea Entertainment Industry Association
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• v.14 no.3
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• pp.163-171
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• 2020

Currently, most of the mobile game market releases games through Google play and App Store, which have a high share. Because it uses a third-party platform, only the payment API system provided must be used, and third-party platform pays the game company after excluding certain fees. Because game companies do not know whether or not to refund items and cannot get back items through third party transactions, users and professional websites are continuously appearing that exploit refunds. In this thesis, after analyzing problems of existing payment method and presenting a payment model using blockchain smart contract, we analyzed differences from existing model in terms of transparency, decentralization(fee), efficiency, and as a result, payment model using smart contract has low commission through P2P transaction without third parties and transparent transaction record, preventing item forgery and refund. Later, the proposed payment model would lead to the culling of companies acting on behalf of refunds for words that deviate from moral ethics such as "Refund OK even with items" and resolve the problem of unreasonable fees that arise through third-party platforms.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.131-132
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• 2018

본 프로젝트는 Unity3D Tool 기반의 가상 체험용 VR 프로젝트를 설계하고 개발하였다. 프로젝트의 핵심 기능 및 환경은 게임 제작용 툴인 Unity를 사용하여 웹과 모바일 앱에서 다양하게 접근할 수 있도록 제작하였다. 웹에서는 키보드와 마우스로 제어하고 모바일 앱에서는 자체 컨트롤러 기능을 활용하여 이동 및 제어 처리하였다. 그리고 VR 장치를 활용한 앱 컨트롤러는 시선으로 제어 할 수 있도록 하였다. 프로젝트 활용환경의 공통적인 기능으로는 화면 중앙에 위치한 이동 포인터를 액션 이미지에 일정 시간 올려놓으면 이벤트가 발생하는 레이케스트 기능을 사용하였다. 건물 내부를 표현한 파노라마 이미지는 해당하는 각 장소마다 360' 카메라를 사용하여 촬영하여 기능을 구현하였다. 본 프로젝트는 다양한 네트워크 및 컴퓨팅 환경에서 활용할 수 있는 가상 체험 프로젝트이다. 가상 체험을 통해 가상공간에서 거리, 공간, 시간에 구애받지 않고 학교 소개 및 홍보를 위한 마케팅 효과를 가질 것이다.