• Journal of KIISE:Information Networking
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• v.28 no.3
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• pp.447-453
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• 2001

In this paper, we consider the scheduling of SE(switching element)-disjoint multicasting in photonic Banyan-type switching networks constructed with directional couplers. This ensures that at most, one connection holds each SE in a given time thus, neither crosstalk nor blocking will arise in the network. Such multicasting usually takes several routing rounds hence, it is desirable to keep the number of rounds(i.e., scheduling length) to a minimum. We first present the necessary and sufficient condition for connections to pass through a common SE(i.e., make crosstalk) in the photonic Banyan-type networks capable of supporting one-to-many connections. With definition of uniquely splitting a multicast connection into distinct subconnections, the crosstalk relationship of a set of connections is represented by a graph model. In order to analyze the worst case crosstalk we characterize the upper bound on the degree of the graph. The successor paper(Part II)[14] is devoted to the scheduling algorithm and the upper bound on the scheduling length. Comparison with related results is made in detail.

• The Transactions of the Korea Information Processing Society
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• v.5 no.3
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• pp.851-861
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• 1998

Korean language is to be characterized by the rich vocal sound variation. In order to increase the probability of vocal sound recognition and to provide a natural vocal sound synthesis, a systematic and thorough research into the characteristics of Korean language including its vocal sound changing rules is required. This paper addresses an effective way of vocal sound recognition and synthesis by providing the design and implementation of the Korean vocal sound variation rule. The regulation we followed for the design of the vocal sound variation rule is the Phonetic Standard(Section 30. Chapter 7) of the Korean Orthographic Standards. We have first factor out rules for each regulations, then grouped them into 27 groups for eaeh final-consonant. The Phonological Change Processing System suggested in the paper provides a fast processing ability for vocal sound variation by a single application of the rule. The contents of the process for information augmented to words or the stem of innected words are included in the rules. We believe that the Phonological Change Processing System will facilitate the vocal sound recognition and synthesis by the sentence. Also, this system may be referred as an example for similar research areas.

• KIPS Transactions on Computer and Communication Systems
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• v.5 no.1
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• pp.7-16
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• 2016

This paper discusses a method of selecting variant groups to be reviewed for LGR (Label Generation Rule) of Internet Top-Level Hanja Domain. The most difficult problem in setting up LGR of Internet Top-Level Hanja Domain is how to treat Hanja variants. If domains containing variants (e.g.: 東海國) are directed to different addresses, confusion will arise. Therefore, it is desirable that such domains are directed to the same address. Since variant groups of Korea and China are not same, we need to unify variant groups of Korea and China. In the process of reviewing 3093 Chinese variant groups, the author found that Korea does not need to review Chinese variant groups which include no or just one Korean Hanja character. Korea only need to review Chinese variant groups which include two or more Korean Hanja characters. By doing so, the author could reduce the number of Chinese variant groups to be reviewed by Korea from 3093 to 303, which is only one-tenth of the original number of Chinese variant groups. After Korea finishes reviewing 303 Chinese variant groups selected according to the method suggested in this paper, the job of setting up LGR of Internet Top-Level Hanja domain will be accelerated by negotiating with China.

• The Journal of the Acoustical Society of Korea
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• v.15 no.4
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• pp.98-104
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• 1996

This paper propose the alteraton rule to compensate a formant trasition of several connected vowels for improving an unnatural synthesized continuous speech which is concatenated by each demisyllable without coarticulated formant transition for use in dmisyllable based synthesis by rule. To fullfill each formant transition part, the database of 42 stationary vowels which are segmented from the stable part of each vowels is appended to the one of Korean demisyllables, and the resonance circuit used in formant synthesis is employed to change the formant frequency of speech signals. To evaluate the synthesied speech by this rule, we carried out the alteration rule for connected vowels of the synthesized speech based on demisyllable, and compare spectrogram and MOS tested scores with the original and the demisyllable based synthesized speech without this rule. The result shows that this proposed rule can synthesize the more natural speech.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2007.04a
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• pp.65-68
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• 2007

고속국도 및 일반국도 인터체인지부의 설계속도를 분석하기 위하여 현재 적용되고 있는 국내의 설계기준 즉, 도로의 구조 시설기준에 관한 규칙 및 도로설계편람, 도로설계요령, 도로설계기준, 국도설계기준을 검토하고, 국외의 설계기준을 참고하여 국내기준과 비교 검토하였다. 고속도로 교통사고 통계(2006)를 통하여 사고 다발지점을 선정, 원인을 분석하고 램프 유형별, 허용속도별 전국의 입체교차로를 대상으로 주행속도를 계측하였으며, 그 결과로부터 입체교차로의 Loop Ramp 접속부의 적정 설계속도를 제안하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1993.04a
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• pp.98-105
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• 1993

본 논문에서는 설계 경험이 적은 설계자가 효율적으로 선급규정을 이용하여 선체설계를 할 수 있도록, 범용 전문가시스템 쉘(Shell)인 NEXPERT를 이용하여, 선체 구조설계를 지원할 수 있는 전문가시스템을 개발하였다. 먼저, 선급규정집(LLoyd Rule)과 기존의 rule scantling프로그램으로부터 지식을 추출하고, 이를 바탕으로 객체지향개념에 의해 지식의 그룹핑과 계층화를 시도하였다. 또한, NEXPERT가 갖고 있는 외부 프로그램과의 접속기능 (Cellable Interface)을 이용하여 각종 설계에 필요한 프로그램과 실적선 데이타베이스를 접속하였다. 특히, Motif를 이용한 그래픽 사용자 인터페이스(Graphical User Interface:GUI)를 도입하였고, 설계자가 결과에 대해 검토를 할 수 있도록 Knowledge tracing기능을 부여함으로써, 사용자 지향의 구조부재 치수 결정 지원 전문가 시스템을 개발하였다. 이러한 연구를 통해 범용 전문가시스템이 선박설계에 이용될 수 있다는 가능성을 보였으며, 그 추구해야할 방향을 설정하였다. 특히, 어떤 설계결정에 이르는데 관여한 규칙들을 보여주며, 객체로 정의된 설계부재들의 값을 확인하게 함으로써 설계자가 효율적인 설계를 수행할 수 있게 되었다.

• Language and Information
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• v.12 no.1
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• pp.1-26
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• 2008

This paper proposes a dynamic approach to anaphoric resolution in conjunction phrases, in terms of Discourse Representation Theory. Unlike Kamp, van Genabith, and Reyle (forthcomming)'s analysis, it proposes two different types of discourse representation structures for conjunction phrases; one for coordinate phrases such as and conjunction phrases and the other one for subordination conjunction phrases such as when subordination phrases. Following Chung (1992), Chung (2004), every element is processed in the order of occurrence and conjunction operators in a non-sentence-initial position cause the ongoing DR to split in two with the same index. DRS conditions and accessibility are accordingly modified so that DRs for conjunction clauses can be accessible from DRs for main clauses.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.71-73
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• 2000

본 논문에서 다루는 SGML 문서편집기는 파서를 내포하는 구조로서, 문서편집을 위하여 DTD 가 입력되고, 입력된 DTD 는 DTD 파서에 의해 적합성을 점검하게 된다. DTD 파서는 표준규칙에 따라 DTD를 파싱하고, 결과를 편집처리에 적합한 BNF-스타일 형태로 변환된 문법 테이블을 생성한다. SGML 문서 편집은 문법테이블 정보에 따라 처리된다. 문법 테이블의 크기는 엘리먼트 선언내용 중 컨텐트 모델의 표현에 따라 결정된다. 그 중 and(&) 접속자는 엘리먼트 개수에 따라 문법수가 기하급수적으로 증가하므로 DTD 파서에 의해 처리된다면 속도나 비용면에서 비효율적이다. 이에 본 논문에서는 고정된 문법테이블을 이용하는 SGML 편집기에 and 접속자로 표현된 엘리먼트 문법을 동적으로 확정 처리할 수 있는 기능이 추가 향상된 구문지향적 SGML 문서편집기를 제시한다. 그러므로 향상된 구문지향 SGML 문서편집기는 고정된 문법을 이용한 문서편집 뿐 아니라 편집처리에 따른 변환에 능동적으로 처리할 수 있다는 특징을 갖게된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.148-154
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• 2016

Video security has recently emerged as an important issue owing to CCTV video image spill accidents over the Internet. KISA recommends the use of encryption protocols for remote access through its guidelines for CCTV personal video information protection. But still, many products do not adhere to the guidelines, and those products are easily exposed to security threats, such as hacking. To solve these security vulnerabilities, this paper proposes a CCTV system that connects from remote locations, and is implemented by using secure shell (SSH) tunneling techniques. The system enhances security by transmitting encrypted data by using SSH. By using the tunneling technique, it also solves the problem of not being able to access a CCTV recorder located inside a firewall. For evaluation of the system, this paper compares various CCTV remote access schemes and security. Experimental results on the effectiveness of the system show it is possible to obtain remote access without a significant difference in transmission quality and time. Applying the method proposed in this paper, you can configure a system secure from the threats of hacking.

• 한국정보교육학회:학술대회논문집
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• 2004.08a
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• pp.721-729
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• 2004

최근에 학교 현장에서 제공하는 홈페이지는 학교의 정보화 능력을 가늠하는 척도가 되고 있으며 학생과 학부모 그리고 학교가 상호 의사소통 할 수 있는 좋은 장을 마련해주고 있다. 그러나 끊임없이 변화하는 학생들의 검색 패턴에 대해서 학교 홈페이지가 적절히 대처하지 못하고 있으며, 그들의 방문 목적 달성을 위한 충분한 안내를 제공함에 있어 한계를 가지고 있는 것이 사실이다. 본 논문에서는 사이트 접속자들의 행동 패턴 분석을 위해 웹서버 로그 데이터를 이용하고, 데이터 마이닝의 한 기법인 연관규칙을 적용하여 로그 데이터를 분석함으로써 사용자들의 의미 있는 행동패턴을 추출하는 알고리즘을 제안하였다. 이렇게 추출된 행동패턴을 기반으로 하이퍼링크가 자동으로 생성되어 해당 웹페이지에 삽입됨으로써 특정 개인뿐만 아니라 공통의 다수가 편리하게 이용할 수 있는 적응형 학교 웹사이트 구축 방안을 제시한다.