• The Journal of the Korea Contents Association
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• v.22 no.3
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• pp.121-133
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• 2022

The main purpose of this paper is to examine the efficacy and future potential of a newly-emerging concept of a metaverse in online education environment. In order to achieve this goal, this paper showcases various scenes that happened in the metaverse classes using the ifland app. Through an in-depth analysis of theoretical grounds and preliminary survey findings of 32 university students, this study suggests that as students in a metaverse space are engaged in the interactive learning process and environment with an avatar that projects oneself, it can be an effective educational platform coming from the benefits of gamification and edutainment. In addition, a metaverse space provides existential encounters and hands-on experiences, which in turn increases the level of 3D learning immersion. It may overcome the shortcomings of online live streaming platforms such as Zoom or Webex that provide 2D experiences. Based on the findings, this paper further suggests a blueprint for online education suitable for the transition to a digital society.

• Annual Conference of KIPS
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• 2014.04a
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• pp.880-882
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• 2014

본 논문에서는 3D 모델링 기반의 관광정보서버 및 모바일 어플 서비스 기술 개발 중 하나로 관광지형 및 지물을 편집하는 도구로 지형, 지물을 디자인하거나 사진영상을 통해 자동으로 추출할 수 있는 오브젝트 제작 도구개발 및 관광 포인트에 대한 트윗 연동 모듈을 설계하고자 한다. 향후 3차원 국토공간정보 구축 기술에 대한 새로운 서비스 개발에 핵심 기술로 활용가능하고 우리나라의 GIS를 선도할 수 있는 계기가 될 수 있는 3D 모델링 기반의 관광 정보 앱 서비스 기술을 설계하고자 한다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.7
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• pp.46-52
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• 2006

The effects of surface treatment on the hydrogen storage properties of a $Mg_2Ni$ alloy particle were investigated by the microvoltammetric technique, in which a carbon-filament microelectrode was manipulated to make electrical contact with the particle in a KOH aqueous solution. It was found that the hydrogen storage properties of $Mg_2Ni$ at room temperature were improved by the surface treatment with a nickel plating solution. The sodium salts(sodium phosphate and sodium dihydrogen citrate) contained in the nickel plating solution made the alloy form an amorphous-like state, resulting in an improved hydrogen charge/discharge capacity at room temperature as high as about 150[mAh/g] from the original value of 17[mAh/g]. Potential-step experiment was carried out to determine the apparent chemical diffusion coefficient of hydrogen atom($D_{app}$) in the alloy. Since the alloy particle we used here was a dense, conductive sphere, the spherical diffusion model was employed for data analysis. $D_{app}$ was found to vary the order between $10^{-8}{\sim}10^{-9}[cm^2/s]$ over the course of hydrogenation and dehydrogenation process.

• Annual Conference of KIPS
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• 2014.11a
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• pp.1145-1148
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• 2014

최근 스마트폰 앱의 공급이 급속히 늘어남에 따라 사용자의 눈높이는 갈수록 높아지고 있다. 이에 따라 스마트폰 앱 공급자는 앱을 제작할 때 좀 더 유익한 기능을 제공하기 위하여 노력해야 함은 물론이고 사용자에게 좀 더 흥미를 유도할 수 있는 시각적인 요소를 부각시키기 위하여 많은 노력을 기울여야 한다. 그런 시각적인 요소를 프로그램 개발자가 코드 구현만으로 표현하기에는 많은 어려움이 따르며 개발 기간이 그만큼 늘어나게 된다. 본 논문에서는 시각적인 측면에서 좀 더 고급화된 스마트폰 앱을 제작하기 위하여 역동적이고 차별화된 앱을 제작할 수 있는 동적 화면 저작도구를 제안한다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.876-877
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• 2023

3D 기술과 인공지능을 활용한 가상 옷장 앱 BBoM은 패스트패션의 환경 오염을 줄이고 지속 가능한 소비문화를 조성한다. 깊이 추정(depth estimation) 기술을 활용하여 2D 이미지를 3D 모델로 변환하였다. 이러한 기능은 소비자들의 소비 패턴에 도움을 줄 뿐만 아니라 1년 후에 연간탄소 배출량을 37% 감소시킬 수 있다.

• Journal of Power System Engineering
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• v.16 no.3
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• pp.5-9
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• 2012

Novel mechanisms for Energy Recovery Devices are proposed to diminish the pressure loss in the high-pressure reverse-osmosis system. In the beginning, the state-of-the-art in the design of Energy Recovery Devices is reviewed and the features of each model are investigated. The direct-coupled axial piston pump(APP) and axial piston motor(APM) showed 39% energy recovery at operating pressure of reverse osmosis desalination systems, 60 bar. Meanwhile, the developed PM2D model, in which APM pistons are arranged parallel to those of APP, is more compact and showed higher efficiency in a preliminary test. Loss-reduction mechanisms employing rod piston and double raw valve port are additionally proposed to enhance the efficiency and durability of the device.

• Journal of Applied Reliability
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• v.16 no.2
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• pp.134-146
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• 2016

Purpose: Many domestic companies have to make out quantitative evaluation table in their proposal when they conduct the software R&D project. However, most of companies have a difficulty to select the evaluation items and criteria, also to derive a quantitative results. Therefore, we propose a method to derive the quantitative evaluation index by utilizing the ISO/IEC 9126-2. Methods: Analyzing ISO/IEC 9126-2, and we classify the quality metrics as high-classification and sub-classification for Web/App software, Embedded software and Installation software. Next, Conduct the metrics selection survey depending on importance and necessity. Then, carry out the case study. Verify the correspondence between evaluation items and criteria from original suggestion of company and from outcome by utilizing the ISO/IEC 9126-2 quality metrics. Results: It is possible to classify into two metrics, one for common software or one another for only special software. Furthermore, there is quality metrics that is more important and more necessary depending upon characteristics of the software. Conclusion: ISO/IEC 9126-2 quality metrics can be used to make an evaluation items and criteria for quantitative evaluation table of software product.

• Journal of Korea Game Society
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• v.19 no.6
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• pp.107-116
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• 2019

A diabetes self-management serious game, 'Roly Poly 160' is developed for Type II diabetes patients to decrease their blood Sugar level. For verifying the effectiveness of 'Roly Poly 160', we examined the satisfaction survey. Data were collected from the diabetes patients and public those who have used 'Roly Poly 160' through D Community health center and S Community health center in Gwangju, from November, 27, 2018 to December, 4, 2018. 67 people returned the survey through the 'Roly Poly 160' APP. The overall average satisfaction level was 3.7 out of 5.

• The Journal of Information Systems
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• v.27 no.3
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• pp.141-160
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• 2018

Purpose The purpose of this study is to verify mobile game users' perceived utilities about real (price) and virtual (Ruby) currencies, which are the major factors of in-app purchase (IAP) widely used as a business model in a mobile game industry. Design/methodology/approach By using sales volume and sales frequency data for products sold in an 'S' mobile game from the 'D' mobile game company, we conducted a conjoint analysis according to the procedure recommended by Bicheno (2009). Findings The results of this study indicate that (1) mobile game users have greater utility for a virtual currency (Ruby) than for a real currency (price), (2) mobile game users' utility for virtual (Ruby) and real (price) currencies varies depending on sales volume and sales frequency, as well as (3) mobile markets (e.g., Google Play Store vs. Apple App Store), and (4) mobile game users have greater utility for a virtual currency (Ruby) which can be used readily than later.

• Journal of the Society of Disaster Information
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• v.12 no.2
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• pp.122-129
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• 2016

In this study, a dual structured pipe for a preventive monitoring on a accident damage, a smartphone app program for a survey and a construction data collection and a server program for a real-time monitoring were developed. A pilot system was installed in the test field to analyze effects of a system developed in this study. The data for a damage prevention was detected by the attached sensors on the pipe. Exclusion was tested by the pressure sensors to be installed at regular intervals. The app and server programs was enabled to the real-time data collection and real-time monitoring linked by VRS survey equipments and a smartphone.