• The Journal of Engineering Research
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• v.3 no.1
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• pp.21-27
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• 1998

This paper describes the design and implementation of system for editing SGML document instance using document structure information of SGML DTD. For make use of structure window for logical structure expression of document to SGML document editing without editing mistake of user and easy update the using support to editing process of elements, attributes, entities tools and product document, and valid using SGML parser. Also, in order to support Korean and English text using KS 5601. In this paper, the proposed SGML document editing system is used common controls support of window 95 for window user interface

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.219-222
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• 2013

The Side Channel attack methods proposed by P.Kocher are mainly used for cryptanalysis different cipher algorithms even though they are claimed to be strongly secured. Those kinds of attacks depend on environment implementation especially on the hardware implementation of the algorithm to the crypto module. side-channel attacks are a type of attack introduced by P.Kocher and is applicable according to each environment or method that is designed. This kind of attack can analyze and also extract important information by reading the binary code data via measurement of changes in electricity(voltage) consumption, running time, error output and sounds. Thus, in this paper, we discuss recent SPA and DPA attacks as well as recent countermeasure techniques.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.4
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• pp.310-316
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• 2013

Biometric techniques have been widely used for various areas including criminal identification due to their reliability. However, they have some drawbacks when the biometric information is divulged to illegal users. This paper proposed multimodal biometric system using a real fuzzy vault by RN-ECC for protecting fingerprint and face template. This proposed method has some advantages to regenerate a key value compared with face or fingerprint based verification system having non-regenerative nature and to implement advanced biometric verification system by fusion of both fingerprint and face recognition. From the various experiments, we found that the proposed method shows high recognition rates comparing with the conventional methods.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.6C
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• pp.580-593
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• 2003

A joint design scheme has been proposed to optimize the source encoder and the modulation signal constellation based on the minimization of the end-to-end distortion including both the quantization error and channel distortion. The proposed scheme first optimizes the VQ codebook for a fixed modulation signal set, and then the modulation signals for the fixed VQ codebook. These two steps are iteratively repeated until they reach a local optimum solution. It has been shown that the performance of the proposed system can be enhanced by employing a new efficient mapping scheme between codevectors and modulation signals. Simulation results show that a jointly optimized system based on the proposed algorithms outperforms the conventional system based on a conventional QAM modulation signal set and the VQ codebook designed for a noiseless channel.

• Journal of Broadcast Engineering
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• v.15 no.4
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• pp.547-554
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• 2010

In this paper, we propose transmission systems for ultra high definition television (UHDTV) through terrestrial transmission by applying the multi-input multi-output (MIMO) technology. The space time block code, hybrid STBC, V-BLAST and linear dis- persion code are considered to support a high data rate of the UHDTV system. The performance of proposed MIMO systems are evaluated through computer simulations. Then we suggest MIMO parameters, number of antennas and optimal transmission scheme to achieve the transmission rate of the UHDTV system.

• Journal of Korea Society of Industrial Information Systems
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• v.18 no.2
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• pp.41-46
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• 2013

Finite field multipliers are the basic building blocks in many applications such as error-control coding, cryptography and digital signal processing. Recently, many semi-systolic architectures have been proposed for multiplications over finite fields. Also, Montgomery multiplication algorithm is well known as an efficient arithmetic algorithm. In this paper, we induce an efficient multiplication algorithm and propose an efficient semi-systolic Montgomery multiplier based on polynomial basis. We select an ideal Montgomery factor which is suitable for parallel computation, so our architecture is divided into two parts which can be computed simultaneously. In analysis, our architecture reduces 30%~50% of time complexity compared to typical architectures.

• Journal of Korea Society of Industrial Information Systems
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• v.22 no.6
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• pp.1-7
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• 2017

This Paper Addresses a Performance Enhancement of Multitude Receivers Communicating with a Basestation. A General Link between Basestation and Terminal is that a Basestation is connected with Multitude Receivers and Time, Frequency and Code are shared and used among them. We propose an Algorithm of Enhancing Receiver Capability at the Receiver when access Point of Acting as a Basestation in this Environment Modifies Transmission Data Separately to be sent. In the Proposed Algorithm, we configure Transmit Data to Use Maximal Ratio Combining Technique in the Receiver, and Estimate Transmitter Signal per Each Receiver and Simulate Bit Error Rate and Show the Performance Results.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39A no.10
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• pp.569-573
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• 2014

Holographic data storage is a strong contender to become the next-generation data storage method. Its major weaknesses are two-dimensional intersymbol interference between neighboring pixels and interpage interference caused by storing multiple pages in a single volume of hologram. In this paper, we present a trellis encoding scheme of 6/8 balanced modulation code, to address the two weaknesses. The proposed modulation coding scheme captures on characteristics of the balanced code: the scheme relaxes IPI and enables error correction by exploiting the trellis structure. The proposed method showed improved SNR over the conventional 6/8 modulation code.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.12
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• pp.111-122
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• 2014

As radiotherapy has become one of the widely used techniques in cancer treatment, accurate tracking of patient's respiratory motion is considered to be more important in treatment planning and dose calculations. Inaccurate motion tracking can cause severe issues such as errors in target/normal tissue delineation and increasing the volume of healthy tissues exposed to high doses. Different methods have been introduced to estimate the respiratory motion, but most of them require some electronic devices or expensive materials. As an inexpensive and easy to use alternative to the previous methods, we propose a new 3D respiratory motion tracking method by using stereo vision techniques of detecting and decoding visual coded markers.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.961-964
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• 2000

단위 자동화 시스템에 내장되어 운용되는 내장형 시스템의 응용 소프트웨어의 제작은 대부분 다년간 실무 경험을 갖고 있는 전문가들이 타겟 시스템의 목적과 기능 및 성능 명세를 작성하고 이를 구현함으로써, 개발 생산성이나 타겟 시스템의 신뢰성 향상이 곤란하다. 또한 개발의 마지막 단계에서 테스트를 통해 오류를 발견하게 되고 이로 인해 대부분 앞 단계로 돌아가 전체 설계를 재검토해야만 하는 실정이다. 본 논문에서는 이러한 내장형 응용 소프트웨어 개발을 위해 편의성과 신뢰성을 향상시킬 수 있기 위해 소프트웨어 자동 검증을 위한 정형기법, 컴파일러 및 사용자 편의를 위한 GUI, 재사용 및 유지보수가 용이한 목적코드의 발생 등 전반적인 소프트웨어 공학적인 기술들을 이용하여 시각적 명세에 의한 실시간 내장형 응용 소프트웨어 개발 자동화 도구의 개발을 위한 기술의 개발을 목표로 삼고 기술되었다.