• Journal of Information Processing Systems
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• v.7 no.1
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• pp.209-220
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• 2011

One of the major factors influencing the phenomenal growth of the smart phone market is the active development applications based on open environments. Despite difficulties in finding and downloading applications due to the small screens and inconvenient interfaces of smart phones, users download applications nearly every day. Such user behavior patterns indicate the significance of smart phone applications. So far, studies on applications have focused mainly on technical approaches, including recommendation systems. Meanwhile, the issue of culture, as an aspect of user characteristics regarding smart phone use, remains largely unexamined throughout the world. Hence, the present study attempts to analyze the highest ranked smart phone applications downloaded and paid for that are ranked the highest in 10 countries (Korea, Japan, China, India, the UK, USA, Indonesia, Canada, France, and Mexico) and we then derive the CDSC (Cultural Dimensions Score of Content) for these applications. The results derived are, then, mapped to the cultural dimensions model to determine the CISC (Cultural Index Score for Country). Further, culturally significant differences in smart phone environments are identified using MDS analysis.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2020.06a
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• pp.38-39
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• 2020

Currently, attempts are being made to introduce innovative teaching methods in architectural engineering education. However, there is still a lack of research supporting self-directed learners. In this regard, this study sought to develop an application prototype to support learning from online lectures on architectural engineering and conduct prototyping for its evolution. Menus in the application prototype consisted of four main categories: lecture operation, video lectures, eBooks and past exam questions. The lecture operation was classified into eight sub-categories, including assignment submission and notice, so as to support interactions between instructors and learners as well as confirmation of the delivery methods. With respect to video lectures, assignment submissions and notice functions, prototyping connecting the mobile web was implemented to enhance user convenience.

• Journal of the Ergonomics Society of Korea
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• v.36 no.4
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• pp.293-303
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• 2017

Objective: This study aims to evaluate visual discomfort and visual fatigue caused by watching HMD and smartphones by conducting both subjective and objective measure. Background: With the rapid development of mobile Head-Mounted Display (HMD), the problem of visual discomfort and visual fatigue caused by watching Virtual Reality (VR) contents became a crucial concern for consumers and manufacturers, especially given that the casing of mobile HMD keeps the phone at a specified distance from the lenses that is close to the eyes. Method: Two smartphones were chosen for a preliminary study: LG G5 and Galaxy S7. As for a main study, iPhone 6S and Galaxy S7 were used. After being exposed to the selected clips, participants were asked to answer Simulator Sickness Questionnaire (SSQ) and went through optometric tests that measure tear break-up time, spherical equivalent, and contrast sensitivity. Results: The subjective assessments indicate that HMD causes more visual discomfort compared to watching a smartphone. Furthermore, the experimental result confirms that watching a HMD causes more eye dryness compared to smartphones. Conclusion: The result of the study compared visual discomfort and visual fatigue of two different displays, HMD and smartphone, and confirmed that watching HMD causes more visual discomfort and visual fatigue. Application: Ultimately, this study could help manufacturers understand the strengths and weaknesses of different display forms, providing guidance for an effective application of HMD.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.815-817
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• 2015

Annually more than three hundred thousand lost articles are found in Korea. These articles are only being nuisances kept in lost-and-found centers and storing them consumes a considerable amount of costs. In this paper, we developed a mobile application that helps to find lost articles quickly by using NFC which is the next generation short-distance telecommunication technique. We aim to increase NFC utilization that at this time is only used in limited areas such as public transportation card and Smart Wallet. In addition to this, we seek to reduce the cost for keeping annually lost articles as well.

• Journal of Korea Spatial Information System Society
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• v.8 no.3
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• pp.65-75
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• 2006

Recently, the technologies related with location-based services have been a promising and vigorously researched area in mobile telecommunication industry. LBS have obtained increasingly high attention particularly in domestic area, due to increases in various LBS services supplied by mobile telecommunication companies. LBS technologies are classified by sub-technology such as location determination technology, LBS platform technology, and LBS application services technology. In this paper, I have examined the trend of LBS technologies by analyzing the issued or published patents from 1991 to 2005. The analyzed results are very useful for avoiding overlapping efforts in developing the LBS related technologies, and searching the direction of development of technologies which are different from previous ones.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.6
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• pp.1455-1459
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• 2016

Recently, the frequency of dealing important information regarding financial services like paying through smart device or internet banking on smart device has been increasing. Also, with the development of smart device execution environment towards open software environment, it became easier for users to download and use random application software, and its security aspect appears to be weakening. This study will inspect features of hardware-based smart device security technology. Furthermore, this study will propose a realization method in MTM hardware-based secure smart device execution environment for application software runs that in smart device.

• Journal of Digital Contents Society
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• v.18 no.5
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• pp.821-829
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• 2017

In recent, there has been a great change in the shopping market due to the development of the Internet and the generalization of mobile devices. Customers have become more comfortable with online shopping where they can purchase clothes without having to visit their own shop directly. While online shopping is convenient and easy to buy, it is difficult to judge whether it is suitable for you to buy clothes. This paper proposes an application that users virtually coordinate on their own full-body photo or a user-specified model. The proposed application encourages smart purchases by enabling users to see their virtual coordination on their bodies.

• Journal of Internet Computing and Services
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• v.22 no.3
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• pp.37-43
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• 2021

In this paper, we study how objects from front and back cameras can be recognized in real time in a mobile environment to segment regions of object pixels and synthesize them through image processing. To this work, we applied DeepLabV3 machine learning model to dual cameras provided by Apple's iOS. We also propose methods using Core Image and Core Graphics libraries from Apple for image synthesis and postprocessing. Furthermore, we improved CPU usage than previous works and compared the throughput rates and results of Depth and DeepLabV3. Finally, We also developed a camera application using these two methods.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.295-296
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• 2021

'서포트업' 앱은 음식점을 경영하는 소상공인들과 식자재 공급업체 사이를 연결해주고 관리하는 서비스를 제공하는 모바일 앱으로서, 소상공인들이 손쉽게 창업 및 경영을 할 수 있도록 지원함으로써 지역 경제 활성화에 기여하기 위한 목적으로 구현되었다. 모바일 앱의 특성상 터치 몇 번으로 간편하게 거래처와 연결될 수 있다는 점에 포커스를 맞추어 음식점 경영자들에게 편리성과 유용성을 제공한다. 특히 처음 창업하는 경영자들이 평이 좋고 지리적으로 가까운 식자재 공급업체를 쉽게 찾을 수 있게 해주며 공급업체에 연결하여 식자재 확보 과정도 쉽게 이해할 수 있도록 서비스를 지원한다. 앱을 이용하는 음식점 경영자들은 자신이 원하는 조건과 환경에 맞추어 식자재 품목별로 공급업체들에 대한 정보를 비교해보고 거래처를 정하여 거래를 할 수 있으며, 이용한 거래처에 대한 평을 남김으로써 다른 이용자들에게 거래처에 대한 정보를 제공할 수도 있다.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.239-244
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• 2008

We lead a life in our community, beginning a new relationship with a stranger or maintaining or stopping existing relationships. Relationships with others are sustained through social activities based on communication. Generally speaking, by exchanging feelings and information through communication, relationships are formed and continued, and strengthened through active communication As a result of the development of technologies and information technology over the recent 10 years, a mobile phone has stood as a communication channel, and now it has become such a universal, and highly intimate and important means of communication that almost all the Koreans use more often than wired phones. Today, people have their communication channel available for others, by using a mobile phone at any time and anywhere. Like this, mobile phones have been playing a key role in helping people maintain, repair and strengthen their personal relationship, but from the perspective of personal relationship management, they still remain as an aid to help communication, failing to provide a positive help for actual relationship management. This study was designed to provide services supporting user's personal relationship management, focusing on the use of mobile phones as a major tool of communication, aiming to enable users to understand current state of their relationship and make relationship management efforts, or communication behaviors, by informing who needs communication, on the basis of data on mobile phone calls. To this end, the study established a method to extract intimacy between users and callers and develop a prototype of services supporting personal relationship management, using relationship characteristics in terms of mobile communication.