• 제어로봇시스템학회:학술대회논문집
• /
• 1994.10a
• /
• pp.461-466
• /
• 1994

This paper is concerned with the positioning control of a flexible arm system using H$_{\infty}$ control theory with optimum sensor location. Firstly, by virtue of the orthogonality of the flexible modes of the flexible arm a reduced order model of the tributed parameter system(DPS) representing the arm has formulated. The dynamical coupling between the flexible arm and DC motor has been considered to formulate an motor composite model. In order to achieve precise positioning with vibration attenuation, sensors have been optimally located. Finally, a robust H$_{\infty}$ controller was designed and the performance of the positioning system has been analyzed.d.

• Journal of Information Technology Services
• /
• v.19 no.2
• /
• pp.83-92
• /
• 2020

The current technology drain at small and medium-sized enterprises in Korea is very serious. According to the National Intelligence Service's survey data, 69 percent of technology leaks are made through employees of small and medium-sized enterprises. A document security system was introduced to compensate for the problem. However, small and medium-sized enterprises are not doing well due to their poor environment. Therefore, it proposes a document security system suitable for small businesses by developing a location information machine learning system that automatically creates a document security Green Zone through learning, and an ECM-based electronic document leakage prevention system that manages generated Green Zone information by reflecting it into the document authority system. And step by step, propose a universal solution through cloud services..

• Proceedings of the KIEE Conference
• /
• 2002.11b
• /
• pp.59-61
• /
• 2002

This paper describes how travelling waves measured at an end of a transmission line can be used for fault location. In this paper a FIR filter which makes' high frequency components much more prominent is proposed. Consequently. the algorithm can distinguishes correlation peaks. A series of simulation studies using EMTP verified that the proposed algorithm can calculate an accurate fault distance in spite of effects of various errors.

• 제어로봇시스템학회:학술대회논문집
• /
• 2000.10a
• /
• pp.453-453
• /
• 2000

This paper presented Fuzzy logic application to Electrical power system analysis for fault location estimation in distribution lines and apply the Power system theory to be fuzzy logic database. The case study referred to the Overhead distribution line of the Provincial Electricity Authority (PEA.), Thailand which mostly the distribution line of PEA. are Radial schemes. These benefits include reduced outage time, help in locating momentary faults, enhance safety to the line crews and provide notification of an outage without receiving calls from the consumer, Which these benefits also increase Reliability, Stability and Efficiency.

• Journal of Korea Society of Industrial Information Systems
• /
• v.19 no.2
• /
• pp.67-72
• /
• 2014

Zigbee is a wireless communication technology optimized for Wireless Sensor Network environment. Implementation of location estimation system is based on Zigbee. In this paper, we implement mobile information system using zigbee technology. The proposed system is composed of mobile terminal software and mobile reader softwrae. We also used our hardware in previous system.

• Proceedings of the KIEE Conference
• /
• 2003.07a
• /
• pp.366-368
• /
• 2003

In this paper, a parametric evaluation method of protection ability is proposed. The adequacy of every parameter is evaluated for the setting rules. Then the results are combined to give protection level of a whole protective system. The setting rules are categorized into three groups for hierarchical calculation. The proposed scheme is applied to a location problem of a new protective device to show its effectiveness.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2018.10a
• /
• pp.947-948
• /
• 2018

ICT 기술이 발전함에 따라 다양한 분야에서 사물 인터넷을 활용한 서비스들이 구현되고 있다. 그중에서 비콘을 이용한 위치기반서비스(Location-Based Service)는 산업분야에서 활용성이 높다. 스마트 팩토리에서 비콘을 제품이나 박스에 부착하여 통합 물류관리를 시스템을 구축하고, 병원에서는 환자의 상태 혹은 위치를 모니터링하기 위해 비콘을 활용한다. 위치기반서비스를 구현하기에 있어 비콘의 위치를 파악하는 기술이 선행되어야 하고 본 논문에서는 신경망 학습(Neural Network)을 활용하여 RSSI(Received Signal Strength Indication) 기반 비콘의 위치를 추론하는 기법에 대해서 연구한다. 신경망 학습결과 94.89%의 위치 정밀도를 보였다.

• Proceedings of the KSRS Conference
• /
• 2003.11a
• /
• pp.866-868
• /
• 2003

In this paper, we developed those Directory Services based on the Web-Service, because Web-Service environments provide a suitable method to gather requested information in an appropriate way. The proposed architecture cooperate with other OpenLS(Open Location Service) Core Services ( Location Utility Service and Router Determin ation service) and is an interoperability one - it ident ifies those global elements of the global Web-Services network that are required in order to ensure interoperability between Web-Services. In this paper, a new architecture of Directory Service with OpenLS Core Services is proposed and tested in OpenLS Core Services environments.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.6 no.12
• /
• pp.3197-3218
• /
• 2012

Compared with traditional itinerary planning, intention-oriented itinerary recommendations can provide more flexible activity planning without requiring the user's predetermined destinations and is especially helpful for those in unfamiliar environments. The rank and classification of points of interest (POI) from location-based social networks (LBSN) are used to indicate different user intentions. The mining of vehicles' physical trajectories can provide exact civil traffic information for path planning. This paper proposes a POI category-based itinerary recommendation framework combining physical trajectories with LBSN. Specifically, a Voronoi graph-based GPS trajectory analysis method is utilized to build traffic information networks, and an ant colony algorithm for multi-object optimization is implemented to locate the most appropriate itineraries. We conduct experiments on datasets from the Foursquare and GeoLife projects. A test of users' satisfaction with the recommended items is also performed. Our results show that the satisfaction level reaches an average of 80%.

• Nuclear Engineering and Technology
• /
• v.52 no.12
• /
• pp.2958-2968
• /
• 2020

Understanding public perception on nuclear research reactor is necessary for the policy maker to adopt such technology in Thailand, especially the locals who live in the proposed location. The study compared perceptions between the locals living near the proposed nuclear research reactor location (within 5 km) and those living in the outer region (5-15 km). Structural equation modeling technique was adopted by assuming casual relationships between latent variables including social status, information perception, trust, benefit perception and risk perception on the local acceptance of research reactor. The results showed that the strongest relationships for both the inner and the outer perimeters were from information perception toward technology acceptance via trust and benefit perception. While both zones showed similar results, the outer perimeter seemed to show slightly stronger effects than those in the inner perimeter.