• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3412-3420
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• 2015

Smartphone has become an essential element in our daily life and built-in sensors of the smartphone can be utilized in order to recognize of user's situation. However, it is lack of research for safety and accident prevention by dynamic situation recognition. In this paper, we propose a technique that can be recognized risk situation dynamically using accelerometer, microphone and GPS sensor of mobile device. We propose an architecture and process for sensing techniques of Dynamic Recognition Technique, and develop the mobile application for verifying the suitability of the architecture.

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.185-186
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• 2016

안전사고 발생 위험요소가 산재한 사업장 내에서의 이상 징후를 파악할 수 있는 안전관리 시스템의 구축이 필요하다. 또한 사람이 직접 안전관리를 하는 것이 어려운 장소와 사업장 환경의 변화가 중요한 경우까지 고려하고, 실시간으로 정보를 관리하고 대처할 수 있는 방법이 요구된다. 본 연구에서는 유해가스 누출에 열악한 작업환경에서 인명보호 및 안전사고 예방을 위한 작업자 중심 사고 예방을 위한 다중센서 BLE 디바이스개발과 스마트폰 서비스를 연계방법에 대한 시스템을 제안한다. 제안된 시스템은 AQ, AP, Motion, SmartPhone App, Server로 구성하였다.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.121-122
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• 2014

본 연구는 방재디자인에서 가장 중요한 부분인 경감, 예방디자인 분야에서 재난을 예방하고 위험요소를 제거할 수 있는 사용자가 참여하는 인포그래픽에 관한 연구이다. 최근 스마트폰, 태블릿 PC 등의 새로운 플랫폼의 등장으로 더욱 인터랙티브해지고 파워풀한 인포그래픽이 제작되고 있으며 사용자의 요구 또한 다양화, 개성화되고 있다. 이를 해결하기 위해서는 전문가의 직관과 경험을 통한 과거의 설계방법만으로는 최선을 길을 찾을 수 없기 때문에 사용자 참여의 디자인 방법론이 요구된다. 참여디자인은 모든 구성원이 자기가 알고 있는 환경 부분을 만들어 가는 커뮤니티 활동을 통해 이런 목적을 달성할 수 있다. 또한 참여를 통한 인포그래픽은 디자이너들은 과거의 획일화된 해결책을 개혁할 수 있으며 참여문화를 번창시키고 우리를 둘러싼 인적재난을 막기 위한 창조적인 결과물을 만들 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.11a
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• pp.1278-1281
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• 2021

본 논문에서는 시각장애인들의 지하철 이용의 불편함을 최소화할 수 있는 내비게이션 앱을 개발하였다. 스마트폰 카메라가 전방을 인식하여 사물을 판단 후 장애물 혹은 위험요소를 사용자에게 음성으로 전달한다. 또한, 사용자의 원활한 지하철 이용을 위해 공공데이터를 활용하여 지하철 환승 정보, 화장실, 출구 정보 등의 이동 편의를 위한 실질적인 정보를 제공한다. 시각장애인은 본 앱을 활용하여 지하철을 더욱 편하고 안전하게 이용할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.639-642
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• 2014

If the power of the general is not supplied, Visual aids utilize solar power system. The power supply system of these, the role of the power regulator to manage the charging and discharging is very important. In recent years, by introducing the IT technology for the effective management of visual aids, it was supposed to add a device that uses the power consumption. Thus, the importance of power regulator has increased. Currently, the power regulator is installed inside the AtoN, if the accessibility is not ensured, there is a difficulty that can not be checked. In order to solve these problems, in this paper, you have installed the Blue-tooth module to the power regulator. Also, by using the Blue-tooth communication function of a smart phone, a radio check has implemented a possible monitoring system. Advantage of the system implemented is a simple configuration and low installation cost. Also, it is possible to check the state information of the real-time power supply regulator. In addition, it has the effect of preventing accidents and reducing costs of inspection.

• Journal of Digital Convergence
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• v.12 no.1
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• pp.313-317
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• 2014

Smart-phone, PC or tablet platforms, such as smart terminals spread to the masses trying to capitalize. Smart TV also is increasing. In Korea, market size of TV is growing fast with growth of risk of hacking. In this paper, several kinds of Smart TV hacking cases are presented with the possibility of attacks against the vulnerability analysis and countermeasures. Most of the Linux operating system is open. Thus, it is vulnerable for latest hacking techniques. Most are based on the Linux OS to enhance security mount Sand-Box. However, bypass procedure using the technique, or APT attacks can avoid San-Box technique. New hacking techniques and a variety of ways will occur in the future. Therefore, this paper will develop Smart TV, and it analysis of a security threat and establishes better prepared in the future because new hacking attacks are expected to prepare more.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.6B
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• pp.618-630
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• 2011

Mobile RFID system, that consists of the existing RFID reader mounted on the mobile devices such as smartphones, is able to provide the users a variety of services and convenience. Although the users can get the information about a certain product anytime anywhere, there is high probability that their privacy may be violated because their belongings with RFID tags can be scanned by other mobile readers at any time. Several RFID authentication schemes have been proposed to deal with these privacy issues. However, since the existing solutions require heavy computation on the tag side, most of them is not applicable to the general low-cost passive tags which do not have any processing unit. In this paper, we propose the efficient authentication scheme for mobile RFID system applicable to the passive tags as well as the active ones by the best use of computing capability of mobile devices. The proposed scheme satisfies the import security issues such as tag protection, untraceability, anti-traffic analysis. We also implement the proposed scheme on top of real smartphone for feasibility and show the experimental results from it.

• Korean Journal of Agricultural and Forest Meteorology
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• v.19 no.3
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• pp.180-194
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• 2017

Agricultural hazards management technology, which would allow individual farms to respond preemptively, has been developed. A preliminary system developed in the previous study provides precise weather forecasts by farms, notification of weather hazards by crops and delivery of response guidelines (http://www.agmet.kr). Although the GIS map-based alarm system has been implemented for a number of farmers and their farms, its user interface was not designed for individual users who seek information at their farms. In this study, we have developed a mobile application to provide early warnings of weather hazards up to 10 days in advance. A set of information including field-specific weather, crop growth stages and weather hazard alerts can be delivered to individual farmers through their mobile phone. This would guide users to access the map-based system using their smartphone to obtain field-specific weather information by the growth stage of cultivated crops. This would help the farmers make the better use of the existing weather-hazard GIS map-based alarm system.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.538-540
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• 2015

안전 거리 미확보는 교통 사고 원인 중 3위에 이르는 큰 위험 요소이다. 이러한 차간거리 미확보로 인한 사고는 조금만 빨리 대응하여도 사전에 방지할 수 있다. 따라서 주행 중 실시간으로 차간 거리를 추정하여 제공하는 시스템이 필요하다. 본 논문에서는 안드로이드 기반의 실시간 촬영 영상에서 차량의 에지와 후미등을 이용하여 차량을 검출하고, 검출된 차량의 폭을 이용하여 차간 거리를 추정하여 제공하는 시스템을 제안하고, 구현 결과를 제시한다.

• Journal of Service Research and Studies
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• v.6 no.3
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• pp.79-90
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• 2016

Wireless internet service is an important factor to support all industries. In order to connect and use the smart phones or the laptop via a wireless Internet connection, it has been increasing the hacking risks associated with it. As information spills through the DNS address modulation of the Internet router, hacking threats through a wireless router is present. In this paper, we are dealing with the hacking technique utilizing the overall vulnerability of a wireless LAN. We analyzed the need for the wireless LAN security through WEP encryption algorithm and the improved encryption algorithm. In addition, we presented a countermeasure against these hacking technologies which is WEP Crack using wireless vulnerability hacking technology, DDoS attacks, DNS Spoofing.