• (The)Study of the Eastern Classic
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• no.49
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• pp.137-160
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• 2012

This paper focuses on analyzing Eom Heun's grip on reality and attitudes through his literary works. He realized his time as a corrupted world that lack of morality. This actually was a criticism for the existing political force at that time, and he embodied it by using the image of wind, frost, mole cricket, ant, and so on. During that time, he tried to stick to his opinion on integrity. For that, he criticized men of the day who had an apathetic attitude. On the other hand, he praised pine and grass as an image of faith and fidelity. We may verify his world view by reading his literary works.

• The Korean Publising Journal, Monthly
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• s.136
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• pp.6-7
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• 1993

• Digital Contents
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• no.4 s.35
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• pp.12-21
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• 1996

초고속정보통신망에서 전송기술은 매우 중요하며, 전송은 지금보다는 훨씬 큰 정송대역과 망구성의 유연성, 다양한 속성을 갖는 서비스의 통합 전달, 전송망 관리의 통합, 개방화 요구 등에 응할 수 있어야 한다.

• 한국정보통신설비학회:학술대회논문집
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• 2009.08a
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• pp.127-130
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• 2009

We propose a method for detecting DDoS (Distributed Denial of Service) traffic in real-time inside the backbone network. For this purpose, we borrow the concepts of MACD (Moving Average Convergence Divergence) and RoC (Rate of Change), which are used for technical analysis in the stock market Due to the fact that the method is based on a quantitative, rather than a heuristic, detection level, DDoS traffic can be detected with greater accuracy (by reducing the false alarm ratio). Through simulation results, we show how the detection level is determined and demonstrate how much the accuracy of detection is enhanced.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.93-98
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• 1989

This paper describes the application of the recently developed feedback linearization technique to designing a new Command to Line-of-Sight (CLOS) guidance law. We show that the CLOS guidance problem can be formulated as a tracking problem. Then, using the feedback input-output linearization technique, we find a new 3dimensional CLOS guidance law that can assure zero miss distance for a randomly maneuvering target. It sheds light on the feedforward acceleration compensation terms used in the conventional CLOS guidance laws to improve the performance. To illustrate further the significance of our result, simulation results are given.

• Journal of the Korean Institute of Telematics and Electronics
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• v.21 no.1
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• pp.13-24
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• 1984

This paper presents the measurements and analyses of transmission qualities of the existing urban and toll public switching telephone network (PSTN) for the purllose of opening it to data transmission. In the tests, random noise and impulsive noise occuring on the telephone network are investigated and bit error rate and block error rate representing the transmission qualities on the existing telephone network are measured. We recommend the fastest practical data transmission speed on the network and investigate a possibility of opening the public switching telephone network (PSIN) to the data transmission based on the above measurements.

• Information and Communications Magazine
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• v.28 no.2
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• pp.17-24
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• 2011

휴대 가능한 이동 단말의 광범위한 보급과 무선 인터넷 기술을 근간으로 하는 모바일 컴퓨팅의 급속한 확대는 무선 네트워크 용량의 획기적인 증대를 요구하게 됐다. 본 논문에서는 공간 재사용(Spatial Reuse)을 통한 전송 용량 증대를 달성하기 위해 소형화된 셀 기반의 무선 네트워크 구조를 제안한다. 특히, 이 네트워크를 구성하기 위한 핵심기술을 분산화된 계층 교차 최적화, 초소형셀을 위한 이동성 지원, 무선 네트워크 가상화로 구분, 현재 진행중인 연구 내용을 자세하게 기술하고 이와 관련된 주요 이슈들을 함께 다루도록 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.739-740
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• 2016

본 연구는 2륜자동차용 가스분석기 벤치보드와 "교통안전공단" 서버와의 데이터를 전송할 수 있는 중간 미들웨어와 통신 프로토콜 분석에 관하여 연구하였다. "교통안전공단" 서버로의 데이터 전송은 향후에 구축된 2륜자동차 관리 서버와의 통신과 벤치보드와의 통신 내용을 관리할 수 있는 브릿지를 설계하여 벤치보드와 "교통안전공단" 서버와의 데이터 정송 결함 유무를 모니터링 할 수 있는 시스템에 관하여 연구하였다. 또한, 2륜자동차용 배출가스 검사기의 내부 데이터를 원격에서 관리할 수 있도록 이더넷(TCP/IP) 기반의 데이터 통신 프로토콜도 분석하고 설계하였다. 본 연구를 통하여 설계된 가스분석기 통신 프로토콜을 통하여 2륜자동차 검사소에서 계측된 데이터와 "교통안전공단" 서버와의 데이터의 무결점을 제공하기 위한 통신 프로토콜에 대한 데이터 모니터링 기능과 간단한 표시기능을 제공하는 모듈을 제시하고자 한다.

• Journal of Digital Convergence
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• v.1 no.1
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• pp.189-212
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• 2003

The quality of Internet services such as VOD and Web storage services deteriorates as the number of users increases beyond a certain point. However, most of the pricing mechanisms in research as well as those in practice do not reflect such situations (i.e., congestion). The purpose of this paper is to show that different types of pricing mechanisms are required and to model such situations using game theory. We extend Fishburn & Odlyzko(1999) model, in which the service quality is the same for the different pricing schemes, to reflect the situations where the service quality is different between the different pricing schemes due to congestion.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.9
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• pp.1054-1056
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• 2016

As energy consumptions of smartphone increase, many smartphone users suffer from the lack of energy. Thus, many researches have been studied to save energy consumed in smartphone. To avoid inconvenience from the battery depletion, we first propose a remaining energy prediction model derived from the analysis on energy consumption pattern. Based on the model, we propose the energy efficient data transmission method for delay-tolerant applications.