• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.679-682
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• 2010

현재 스마트폰 시장에는 다양한 모바일들이 등장하고 있다. 심비안과 윈도우 모바일이 주를 이루던 모바일 업계에 애플사가 iPhone을 들고 나타나 큰 반향을 일으켰다. 애플사의 iPhone은 앱스토어라는 새로운 시장을 창출하여 모바일 폰의 거대한 변화를 일으키고 있다. 그리고 이제 구글이 지원하는 안드로이드가 나타나 자리를 차지해 나가고 있다. 휴대폰뿐만이 아닌 다양한 모바일 기기에 안드로이드 플랫폼이 올라가고 안드로이드가 우리 생활의 구석구석을 차지 할 것이다. 본 논문에서는 현재 부산버스노선, 지하철노선의 어플리케이션이 다른 지역에 비해서 개발이 미흡한 실정이다. 시민들이 많이 이용하는 버스, 지하철에 대한 정보를 스마트폰에서 구현함으로써 사용자가 실생활에 편리하게 이용할 수 있게 버스, 지하철에 대한 노선정보, 대기시간, 환승정보, GPS를 이용하여 현재위치에서 역검색을 할 수 있게 한다.

• Review of Korean Society for Internet Information
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• v.11 no.1
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• pp.7-12
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• 2010

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.28 no.6
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• pp.25-34
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• 2010

• Journal of Internet of Things and Convergence
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• v.6 no.4
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• pp.65-72
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• 2020

In this paper, we developed a web-based DApp system based on a private blockchain by applying machine learning techniques to automatically identify Android malicious apps that are continuously increasing rapidly. The optimal machine learning model that provides 96.2587% accuracy for Android malicious app identification was selected to the authorized experimental data, and automatic identification results for Android malicious apps were recorded/managed in the Hyperledger Fabric blockchain system. In addition, a web-based DApp system was developed so that users who have been granted the proper authority can use the blockchain system. Therefore, it is possible to further improve the security in the Android mobile app usage environment through the development of the machine learning-based Android malicious app identification block chain DApp system presented. In the future, it is expected to be able to develop enhanced security services that combine machine learning and blockchain for general-purpose data.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.11
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• pp.1323-1330
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• 2014

As for civil service support, the interaction between citizens as well as the government and citizens has an important value, and the participation between citizens be very important. The interaction between these citizens can lead to spreading the use of the app by getting them to share their status information with an specified number of people in the public service such as a social network service. Mobile-based social network service has various built-in sensors to increase the interaction between the government and citizens and post the status information of users on SNS. In this regard, this paper proposed a social network application for civil services based on the Android by using location-based context information. Experimental results showed that since the application proposed in this paper can be applied to low-performance system and exhibits high performance, it can allow users located at a short distance to detect new information and share contents by adding the content to SNS which is the closest to the location of users.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.11 no.1
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• pp.72-85
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• 2012

Today, although most bluetooth hands-free devices within a vehicle provide telephone service functions such as voice communication, caller id display and SMS message display and so on, they do not provide a function that displays Internet-based text data. We need to develop a scheme that displays the internet-based text data including existing hands-free function because the request for using the Internet service is increasing within a vehicle recently. The proposed bluetooth device application includes advanced function such as SNS message arrival notification, the message display function and we chose Android as the implementation mobile platform giving consideration to the fact that most SNS applications operate on Android and the platform is easily embedded into small embedded device. Smartphone or tablet PC connected with the proposed bluetooth device is an Android-based device and we designed a form of Android app for the function implementation of the devices. When the audio-text gateway app receives SNS text data, it extracts title and sender information from the message header information in a form of text data and sends them via ACL (Asynchronous Connection-Oriented) link to the bluetooth device showing the data on the screen. Android-based bluetooth devices are not possible to play voice through speaker because the bluetooth hands-free or headset profile ported within Android platform normally only includes audio gateway's function. The proposed bluetooth device application, therefore, applies the streaming scheme that sends data via ACL link instead of the way that sending them via SCO (Synchronous Connection-Oriented) link.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.417-420
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• 2013

고혈압과 당뇨와 같은 만성질환은 장기적인 관리가 필요하다. 최근 주목받고 있는 폐쇄형 SNS 시스템 설계를 통해서 동일한 질병을 가지고 있는 그룹간의 커뮤니케이션을 활성화하여 자유로운 게시글을 통해서 환자 맞춤형 건강정보를 발굴하고 공유하는 시스템을 안드로이드 어플리케이션을 통해서 구현하였다. 본 서비스를 통해서 건강정보 공유 서비스 연구가 활성화될 것으로 기대한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.1604-1605
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• 2011

본 논문에서는 어플리케이션 가입자의 주소록 정보를 기반으로 한 번호 확인 서비스에 대하여 설명한다. 이 서비스는 사용자 주소록에 존재하지 않는 번호로 전화가 왔을 때, 주소록에 등록된 지인들의 주소록을 검색하여 그 번호의 존재 여부를 알려준다. 이를 통해 지인간의 식별된 전화번호 그룹을 형성할 수 있게 되며, 원치 않은 통화를 피하고 잠재적 지인의 연락을 선택적으로 받아들일 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1544-1545
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• 2011

최근 몇 년 사이에 스마트폰은 우리 생활에서 빼놓을 수 없는 존재가 되었다. 이와 함께, 위치 기반 서비스를 다양하게 제공이 가능해졌고 이에 대한 요구가 증가하고 있다. 본 논문에서는 사용자와 지인들의 위치를 파악하여 지도에 보여주는 애플리케이션인 '꼭꼭 숨어라'를 구현하였다. 이를 바탕으로 향후에 다양한 서비스를 제공이 가능하다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.11
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• pp.870-878
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• 2013

The objective of this paper is to develop mobile-based PACS(Picture Archiving Communication System: mPACS) for diagnostic medical image service available via Android-based mobile smartphone. The proposed mPACS provides an integrated platform for mobile application of diagnostic medical images stored in hospital PACS, and allows the smartphone to store, retrieve, manipulate and transfer the diagnostic medical images. Then, the mPACS platform includes the following features for use in the Android framework (i. e., diagnostic medical image processing) : transfer protocols between PACS, mPACS and smartphone, image format converter, JPEG and JPEG2000 coders, text and avatar search, and etc. This mPACS is shown to be useful and effective in providing a solution for mobile-based diagnostic medical image service.