• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2019.05a
• /
• pp.462-463
• /
• 2019

The study is a method for preventing the natural ignition of indoor low coal coal in coal-fired power plants. It is a method of monitoring the temperature of coal stored in total by combining Internet technology (IoT) with sensor technology as a location confirmation method to detect the natural ignition of coal in advance and to alarm the location of the ignition site.

• Annual Conference of KIPS
• /
• 2010.04a
• /
• pp.674-675
• /
• 2010

Since in web service composition, the same service may be offered by different providers with different Quality of Services (QoS) attributes, selection criteria are needed to select which Web Services will be considered for composition. Location of provider can be one of these criteria and intends to decrease the number of remote interactions between providers as well as reducing waiting time of service consumer. Therefore in this paper, we present technique for composing web services according to their location by semantically describing customer's goals and provider's web service capability by means of carefully designed ontology and logical expression.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2022.10a
• /
• pp.411-413
• /
• 2022

In this paper, considering the change in the sensing distance according to FoV(Fiele Of View) and the sensing distance according to the reflector, the installation location of the TOF(Time Of Flight) sensor is divided into side part installation and front/rear part installation.

• Annual Conference of KIPS
• /
• 2011.11a
• /
• pp.101-103
• /
• 2011

E-Health is one of the most promising applications of wireless sensor networks. This paper describes a prototype for e-Health systems. Based on the system, we propose the energy-balanced location-aided routing protocol. The location and energy information of the neighbor Coordinators is collected and stored in the neighbor discovery procedure. And then the Coordinator selects the most suitable neighbor to forward the data. The simulation results show that the proposed protocol has better performance than the three other routing protocols.

• The Journal of the Korea Contents Association
• /
• v.21 no.10
• /
• pp.38-47
• /
• 2021

This study is about a blockchain-based collective quarantine management system and its commercialization model. The configuration of this system includes a biometric information transmission unit that generates biometric information based on measured values generated from wearable devices, a biometric information transmission unit that transmits biometric information generated here from a quarantine management platform, and action information transmitted from the community server. is a system including an action information receiving unit for receiving from the quarantine management platform. In addition, a biometric information receiving unit that collects biometric information from the terminal, an encryption unit that encodes biometric information generated through the biometric information receiving unit based on blockchain encryption technology, and a database of symptoms of infectious diseases to store symptom information and an infection diagnosis database. The generated database includes a location information check unit that receives from the terminal of the user identified as a symptomatic person and determines whether the user has arrived in the community based on the location information confirmation unit and the location of the user after the location is confirmed. It includes a community arrival judgment unit that judges. And, the community server helps the interaction between the generated information. Such a blockchain based collective quarantine management system can help to advance the existing quarantine management system and realize a safer and healthier society.

• Spatial Information Research
• /
• v.21 no.4
• /
• pp.83-89
• /
• 2013

Recently various contents have been produced using the techniques that require high-performance computing process. A lot of services have been being producted as AR(Augmented Reality) service being combined with mobile information service that a moving user search various information based on one's location with. Mobile information service has a characteristic that it needs to get new information according to the location an user moves to. The characteristic requires a lot of communications when user search information moving to a different location. In order to make up for this drawback, we propose a prefetching technique based on speed and viewing angle in this paper. Existing prefetching techniques retrieve the following location of users considering moving speed and direction of the users. The data showed on the screen in AR is limited by the viewing angle of the mobile device. Due to the problems we discussed above, existing prefetching techniques have a demerit that they retrieve a lot more data than needed actually. We propose more efficient way of retrieving data with AR using the viewing angle of the mobile device. The method we propose reduces retrieval of unnecessary location using the users' speed, direction and viewing angle. This method is more efficient than the existing ways of retrieval because we don't need as many data.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.27 no.3
• /
• pp.1-13
• /
• 2024

This paper proposes a cost-effective system design and user-friendly approach for the key technological elements necessary to configure an autonomous mobile robot. To implement a high-precision positioning system using an autonomous mobile robot, we established a Linux-based VRS (virtual reference station)-RTK (real-time kinematic) GNSS (global navigation satellite system) system with NTRIP (Network Transport of RTCM via Internet Protocol) client functionality. Notably, we reduced the construction cost of the GNSS positioning system by performing dynamic location analysis of the established system, without utilizing an RTK replay system. Dynamic location analysis involves sampling each point during the trajectory following of the autonomous mobile robot and comparing the location precision with ground-truth points. The proposed system ensures high positioning performance with fast sampling times and suggests a GPS waypoint system for user convenience. The centimeter-level precision GNSS information is provided at a 30Hz sampling rate, and the dead reckoning function ensures valid information even when passing through tall buildings and dense forests. The horizontal position error measured through the proposed system is 6.7cm, demonstrating a highly precise dynamic location measurement error within 10cm. The VRS network-RTK Linux system, which provides precise dynamic location information at a high sampling rate, supports a GPS waypoint planner function for user convenience, enabling easy destination setting based on GPS information.

• Journal of the Korea Computer Industry Society
• /
• v.4 no.10
• /
• pp.547-558
• /
• 2003

This paper is a parking management system which uses mobile terminal equipment by the client. From the Web server, the client will be served about the information concerned with the location o( parking lot, parking time, and payment after accessing the parking management web site. After the sensor which is set in the parking lot perceives the information about the client's car, it will inform the client of the parking place. This system is designed to control the large and complex parking lot and serves a very convenient interface to the user.

• Journal of the Korean Society for Library and Information Science
• /
• v.35 no.1
• /
• pp.163-185
• /
• 2001

If you can not pinpoint the location of a desired item through union catalogs and online databases, the next best thing is to identify a special collection that is likely to have it. Many libraries have many items that are recorded only on their own premises as special collections. This paper describes the value of special collections as important information sources and the guides for determining the existence and location of special collections. Women's collection development by KWIC is introduced as a case study of special collection building in the university libraries in Korea.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.10c
• /
• pp.700-702
• /
• 2004

최근 유비쿼터스 네트워크 환경을 통해 새롭고 다양한 서비스가 개발되고 있다. 그 중, 위치기반 서비스(Location Based Services: LBS)는 GPS나 이동 통신망을 사용해 사용자나 사물의 위치를 파악하고 이를 기반으로 유용한 서비스를 제공하는 기술이다. 이 기술은 공공 안전 서비스나 위치 추적, 항법 서비스, 정보제공 서비스 등에 적용되어 사용될 수 있다. 하지만 기존의 위치 기반 시스템은 실내 및 건물 밀집지역에서 위치 인식이 쉽지 않고 사용자의 위치 정보가 누출될 위험성이 있다는 문제점을 가진다. 본 논문에서는 이동 통신망과 무선 근거리 통신망에서 동작하는 이동 에이전트를 이용하여 위치기반 서비스를 구성하였다. 본 기법은 Hybrid Peer to Peer 방식을 이용하여 건물 밀집 지역이나 지하, 실내에서도 정확한 위치측정이 가능하고 개인의 위치 정보도 노출되지 않으며, 나아가 개인 이동 단말기의 상황 인식 컴퓨팅(Context-Aware Computing) 환경 구축에도 도움을 줄 수 있을 것으로 기대 된다.