• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.10
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• pp.1305-1310
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• 2019

Modern agriculture is changing from resource-oriented agriculture to technology-oriented agriculture. Agriculture, which combines science and technology, is recognized as a new growth engine, and governments, local governments, research institutes, and industry are working together to develop and disseminate various devices necessary for smart farms to build intelligent smart farms. Recently, research is being conducted to build a more intelligent agricultural environment by building a cloud platform. In this paper, we propose a plan to build an urban energy - independent smart farm that can utilize leisure time and agricultural activities by utilizing the rooftop of a city. Also, by using IT technology, various data of smart farm can be managed on remote server, and HMI module for controlling internal environment of smart farm can be developed to manage smart farm automatically or semi-automatically. The service model suggests a model that can manage the internal environment of the smart farm based on mobile.

• The Journal of Korean Association of Computer Education
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• v.5 no.2
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• pp.39-48
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• 2002

It is general that the ICAI(Intelligent Computer Assisted Instruction) consists of 4 modules. Export module, Teacher module, Student module and Interface module. In each module construction, there should be some rules to control strategies efficiently and systematically that are related to the texts and assessment instruments, assessment results and evaluation, feedback, etc. It is necessary to use a method to classify the curriculum into sections with units and to represent the identified relationships between them. These relationships are available to all the process of learning, assessment, evaluation and feedback. In this paper, we propose the method to represent these units and relationships as a graph. In addition, we implement an internet-based courseware authoring tool to support the environment in which several expert can construct concurrently the courseware with cooperation between them.

• Journal of the Korean Society of Industry Convergence
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• v.20 no.4
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• pp.285-297
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• 2017

This study proposed a new approach to develop an Intelligent control algorithm for cooperative working of human and robot based on voice recognition. In general case of speaker verification, Gaussian Mixture Model is used to model the feature vectors of reference speech signals. On the other hand, Dynamic Time Warping based template matching techniques were presented for the voice recognition about several years ago. We converge these two different concepts in a single method and then implement in a real time voice recognition enough to make reference model to satisfy 95% of recognition performance. In this paper it was illustrated the reliability of voice recognition by simulation and experiments for humanoid robot with 18 joints.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.11
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• pp.771-778
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• 2014

We propose Femto-cell power control scheme in HeNet with Game Theory. The Femto-cell which provide high quality with low power is issued by many benefits, however there is a bunch of interferences when many Femto-cells use overlapped bandwidth with Macro-cell. We defined base station of cellular networks and mobile users as players of Game Theory, and configured interference effect among each other as power utility function. Futhermore, we showed enhanced overall system performance, lower power usage and interference decrease by using optimal power.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.275-280
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• 2006

본 논문은 스마트 홈에서 다수 사용자를 대상으로 조화로운 미디어 서비스를 제공하는 ubiTV 응용을 제안한다. ubiTV 응용은 사용자의 상황정보를 수집하고 인식하기 위해 정형화된 컨텍스트를 이용하는 ubi-UCAM2.0 을 기반으로 구현되었다. ubiTV 응용은 사용자의 상황정보를 수집하기 위해 위치추적 센서, 출입문센서, 소파센서 그리고 PDA 기반의 리모컨을 활용한다. 그리고 수집된 정보를 기반으로 사용자의 컨텍스트를 인식하고 맞춤형 서비스를 제공하는 방송, 영화, 음악, 영상 및 웹 등의 다양한 미디어 서비스로 구성된다. 이를 기반으로 ubiTV 응용은 사용자의 컨텍스트 및 미디어 콘텐츠 정보를 기반으로 개인화된 서비스를 제공하고 추천한다. 또한, 사용자 및 미디어 서비스 간의 협력을 통해 조화로운 서비스 및 콘텐츠 공유를 지원한다. 그리고 파노라믹 영상을 기반으로 한 직관적인 사용자 인터페이스와 서비스 디스커버리를 통해 사용자들이 미디어 서비스를 쉽고 편리하게 제어할 수 있도록 한다. 실험결과, 제안된 ubiTV 응용은 현재의 널리 사용중인 미디어 시스템과 달리 다수의 사용자들이 미디어 서비스를 함께 이용하고 관심 있는 멀티미디어를 서로간에 공유함을 알 수 있었다. 따라서, 제안하는 ubiTV 응용은 다수의 사용자들이 다양한 미디어 서비스를 조화롭게 이용하도록 함으로서 스마트 홈 환경에서 중요한 역할을 할 것으로 기대된다.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.180-187
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• 2002

Recently, there has been an increase in the demand to enhance the intelligence of construction equipment and systems. Especially for semiautonomous and autonomous systems that have great potential for impact on the construction industry, artificial intelligence approaches are required to generate instructions and plans necessary to perform tasks in dynamically changing environments on their own. The framework for an intelligent earthwork system (IES) is suggested in this paper. It generates a plan automatically for construction equipment and provides a means of cooperation between construction equipment seamlessly. This paper describes the system architecture, control strategy, task planning method, and resource allocation method for IES.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.235_236
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• 2009

본 논문은 전력회사와 수용가가 실시간으로 상호 협력하면 서 여름철 냉방부하를 효율적으로 관리하여 첨두부하를 저감하기 위한 기법에 대하여 기술한다. 전력회사가 필요 관리량을 수용가 측에 요청하면 부하관리 요청을 받은 수용가, 예를 들면 대규모 아파트 단지의 중앙 지능관리 서버가 자율적인 관리를 통하여 요구받은 관리전력 이내로 부하율을 조정하도록 한다. CIMS는 관리전력량에 따라 냉방기를 가동할 수 있는 권리에 해당하는 적정 수의 토큰(Token)을 발행하고 각 세대내의 냉방기를 제어할 수 있는 다수의 로컬 지능관리 서버들이 각 상황에 따라 냉방기를 가동하기 원할 경우에 전체 관리 서버에게 냉방기를 가동할 수 있는 권리에 해당하는 토큰을 요청하도록 한다. 제안하는 관리 기법을 기초로 서울의 한 아파트단지의 여름철 전력수요 데이터를 예로 하여 예상되는 대기 시간과 지원 받을 수 있는 전력요금 규모를 산정해 보았으며 비교적 적은 수용가의 불편으로 큰 부하관리 효과를 얻을 수 있는 것을 알 수 있었다.

• Journal of The Korean Association of Information Education
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• v.2 no.2
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• pp.209-214
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• 1998

The advent of powerful hardware and advances in high speed networks enabled synchronous learning, with teachers and students being geographically distributed but connected via computer networks. Today's synchronous learning systems are mainly based on video conferencing technology which provides audio, video, and joint editing of documents only, but does not take into account the specific requirements of teaching, for instance, controlling the course of instruction, raising hands, or reference pointing. A shared whiteboard is often the core part of these systems. Therefore, in this paper, we look into implementation issues in whiteboards of distance learning systems. Particularly, system architectures and concurrency control mechanisms are considered.

• Journal of Korean Society of Transportation
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• v.20 no.5
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• pp.193-206
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• 2002

A signal optimization model is proposed by applying the Cell-Transmission Model(CTM) as an embedded traffic flow model to estimate a system-optimal signal timing plan in a transportation network composed of signalized intersections. Beyond the existing signal-optimization models, the CTM provides appropriate theoretical and practical backgrounds to simulate oversaturation phenomena such as shockwave, queue length, and spillback. The model is formulated on the Mixed-Integer Programming(MIP) theory. The proposed model implies a system-optimal in a sense that traffic demand and signal system cooperate to minimize the traffic network cost: the demand departing from origins through route choice behavior until arriving at destinations and the signal system by calculating optimal signal timings considering the movement of these demand. The potential of model's practical application is demonstrated through a comparison study of two signal control strategies: optimal and fixed signal controls.

• Journal of the Korea Computer Industry Society
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• v.5 no.2
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• pp.251-260
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• 2004

As the importance and the need for network security is increased, many organization uses the various security systems. They enable to construct the consistent integrated security environment by sharing the vulnerable information among firewall, intrusion detection system, and vulnerable scanner. We construct the integrated security simulation environment that can be used by some security system model. In this paper, we have designed and constructed the general simulation environment of network security model composed of multiple IDSs agent and a firewall agent which coordinate by CNP (Contract Net Protocol). The CNP, the methodology for efficient integration of computer systems on heterogeneous environment such as distributed systems, is essentially a collection of agents, which cooperate to resolve a problem. We compare the selection algorithm in the CPN with the Fuzzy Controller for the effective method to select the agents.