• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.268-271
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• 2014

일반적인 이동 수단은 도보, 자동차, 버스가 있으며 그 외에 기차, 자전거 등이 있다. 사용자가 이용하는 이동 수단 상태는 개개인의 특징을 포함하며 이를 파악한다면 다양한 면에서 유용하게 사용 될 수 있다. 사용자의 이동 수단의 상태를 파악하기 위해서 GPS 정보가 사용될 수 있고, 위치정보 기반의 평균속도를 계산함으로써 대표적인 이동수단인 도보, 자동차, 버스를 구별할 수 있다. 이 논문에서는 사용자가 버스를 탑승하고 있을 경우, 위치 정보와 GIS정보(버스 정류장 정보와 버스 노선 정보)를 통해 해당 탑승 버스의 노선 정보를 예측하기 위한 알고리즘을 제안한다. 알고리즘의 수행 가능성을 파악하기 위해, 약 1개월간 수집된 버스 이동 GPS 로그와 광주지역 버스 노선 및 정류장 정보를 이용한 알고리즘 검증을 수행하였고, 알고리즘이 정상적으로 동작하는 것을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1133-1135
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• 2012

본 논문에서는 IEEE 802.15.4 Zigbee 통신기술을 이용하여 센서 네트워크를 구성하고 사용자의 위치를 사용자가 소지한 Zigbee 동글로부터 수신된 단말 정보와 사용자의 미디어 히스토리 정보를 기반으로 모바일 디바이스와 PC와 같은 디스플레이 자원에서 개인화된 멀티미디어 콘텐츠 이어보기 서비스를 제공하는 서비스 플랫폼을 제안하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.1074-1076
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• 2022

본 논문에서는 각종 물류를 운반해야 하는 실내외 환경에서 스스로 실시간 위치측위가 가능하고 사용자를 등록 및 추적할 수 있는 개인용 AGV 로봇을 제안하였다. 제안한 로봇은 UWB(Ultra Wide Broadband)기반의 비콘을 이용해 사용자를 등록, 실시간 위치를 파악하는 것을 통해 추적하는 기능을 제공한다. 로봇을 사용하기 위한 기반시설이 구축되지 않은 환경에서 활용될 수 있는 방안을 제안하고자 한다.

• The Journal of the Korea Contents Association
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• v.14 no.4
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• pp.19-28
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• 2014

Recent advancements in the IT industry have made daily life more convenient than ever before. In particular, studies have focused on the position detection of individuals using the GPS in smartphones, and this application has been utilized actively in emergency rescue organizations. However, existing methods send the location information of a user to a predetermined guardian set by the user or to a control center when the user enters into or deviates from a predetermined space. Such spaces are created by an arbitrary radius, thereby making it difficult to set a detailed area by using an existing radius-area creation method in an unstructured space and path with a specific road, such as for trekking, amusement parks, or mountaineering. This study proposes a novel method for setting up an area by connecting multiple radii to improve the existing radius-area creation method in order to easily set a detailed area in smart devices or on the Internet. In addition, an optimization method for resource use is proposed by comparing the operation results in which a user's location is detected by using the proposed location-based area setup method and deviation detection.

• The Journal of the Korea Contents Association
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• v.7 no.5
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• pp.138-145
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• 2007

Mobile network evolution and development of USN technologies introduce new business model based on context awareness. Cellular operators provide friend finding service using cell based location information and telematics service using GPS location information. Recently cellular operators provide yellow page service based cell based location information. In this paper, we develop mobile tour application on WIPI platform based on location information. Mobile tour information services provide the best information based on context awareness using user location information from LBS(Location Based Service) Platform, season, weather conditions, time from Web server, and personal preference information stored in database. Mobile tour information service application is developed on WIPI platform.

• The Journal of the Korea Contents Association
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• v.13 no.8
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• pp.171-179
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• 2013

During 19th general election the customized LBSNS(Location Based SNS) application for some candidates of the National Assembly planned and developed based on the object identification, ePosition, comprising the candidate's name have been applied for an election campaign. The approval rating change before and after 19th election campaign period for each candidate was quantitatively studied how it would be affected by the candidate custom LBSNS application. Only 3 out of 24 candidates in 6 local electorates in the Daejon Metropolitan City have adopted the customized LBSNS application and the rest 21 candidates have not, whose approval rating change before and after an election campaign has been analyzed comparatively candidate by candidate. The approval rating for 3 candidates adopting LBSNS application went up by 12.6%, 11.4%, 11.2% respectively, but those for the rest 21 candidates all changed within 3%.

• Information Systems Review
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• v.16 no.2
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• pp.43-59
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• 2014

Social interaction becomes increasingly complicated, sophisticated and specialized. Popular methods of communication has expanded from face-to-face to the use of IT media, as the amount of needs for remote communication increases rapidly as well as the scope of the contents of communication. The purpose of this study is to empirically examine the relationship between the use of IT media and the level of interpersonal trust, and further examine the differences in interpersonal trust across the use of different IT media. A questionnaire survey was performed against 193 individuals in the age group between 20s and 40s, which is considered most active group of IT media. According to a series of regression analysis, the frequency of mediated information exchange is found to be correlated to the level of interpersonal trust. The effect of the amount of time spent with the media was not significant. We also found that the effects on interpersonal trust differed across the use of different types of communication media.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.49 no.3
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• pp.46-55
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• 2012

Recently, the concept of PES(Personal Environment Service) is being widely discussed on various standardization organizations such as ITU-R, ETSI, 3GPP, TTA and etc. The purpose of PES is to introduce the services which can dynamically, automatically and intelligently reconfigures the electronic, electrical, and mechanical equipment surrounding the user according to the user preferences included in a user's profile by using a smartphone embedding WPAN radio technologies such as bluetooth and WiFi. This research introduces an Android Platform-based PES system which consists of a PES app, PES devices and a PES server. A smartphone platform is Android 2.2(Froyo) version and 4 simulated PES devices were implemented by using Galaxy Tab. It has shown that the PES would be a killer application of M2M(Machine-to-Machine) or D2D(Device-to-Device) in the future and it would need to study how to update a user's profile based on analyzing user's behaviour for enhancing the PES user's satisfaction.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.207-210
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• 2013

Recently, rapid innovation of Smartphone is changing the paradigm of our daily life. Smartphone users, opinion experts more than 99 percent of the economically active population is using, it has reached the saturation past the early stages of formation. Smartphone is equipped with a general purpose OS possible the implementation of high performance environment similar level as a personal computer. Also, it is a mobile communication terminal scalable which can be removed or installed various applications. Such extensibility, it is possible to use different applications through the Apps store. In addition, it is also possible various services which are location based service. However, these services also benefit many but it also has a disadvantage of invasion of privacy and disclosure of personal information. In this research, we aim to analyze factors influencing on perceived value and risk in location based service of Smartphone. In addition, we aim to analyze the causal relationship with perceived value and risk in satisfaction and recommendation intention. This study suggests practical and theoretical implications based on the results.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06a
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• pp.343-345
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• 2006

위치정보는 최근 모바일 장치 및 그 어플리케이션의 발달에 따라 괴다란 논점이 되고 있다. 위치정보는 매우 개인적인 특성을 갖는 점에서 암호화 과정이 필수적이다. 하지만 이러한 암호화 작업은 일정한 시간을 소요하는 작업이다. 이는 현재 무선 데이터 전송 속도 및 모바일 장치의 프로세스 능력을 감안할 때 시스템에 있어 무시할 수 없는 성능 저하를 가져오게 된다. 따라서 본 논문에서는 이러한 모바일 장치의 성능 저하를 최소화 할 수 있는 동적 암호화 메커니즘을 설계하였다. 이를 통해 시스템의 성능과 보안 수준간의 적절한 균형을 유지하여 시스템 최적화에 기여한다.