• 충청수학회지
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• 제4권1호
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• pp.61-69
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• 1991

By $C^{(1)}$[0, 1] we denote the Banach algebra of complex valued continuously differentiable functions on [0, 1] with norm given by $${\parallel}f{\parallel}=\sup_{x{\in}[0,1]}({\mid}f(x){\mid}+{\mid}f^{\prime}(x){\mid})\text{ for }f{\in}C^{(1)}$$. By A we denote the sub algebra of $C^{(1)}$ defined by $$A=\{f{\in}C^{(1)}:f(0)=f(1)\text{ and }f^{\prime}(0)=f^{\prime}(1)\}$$. By an isometry of A we mean a norm-preserving linear map of A onto itself. The purpose of this article is to describe the isometries of A. More precisely, we show tht any isometry of A is induced by a point map of the interval [0, 1] onto itself.

• 정보교육학회논문지
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• 제3권2호
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• pp.72-84
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• 2000

정보검색시스템은 전자문서를 효율적으로 저장하고, 정보수요자들이 요구하는 자료를 검색을 통해 빠르게 제공하기 위한 시스템으로 정보화사회에 있어서 매우 중요한 역할을 하고 있다. 특히 색인은 데이터 베이스에 저장된 문서를 효과적으로 검색하기 위한 정보검색시스템의 필수 기능이다. 본 논문에서는 교육용 문서를 적은 자원으로 짧은 시간에 색인할 수 있는 텍스트분할에 의한 색인기법을 제안한다. 제안한 색인기법은 실제 검색시스템에 적용하고, 실험을 통해 우수성을 증명한다.

• 산업공학
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• 제15권4호
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• pp.391-400
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• 2002

The internet call systems using CTI(Computer Telephony Integration) functions are designed with system configuration, DFD(Data Flow Diagram) and ERD(Entity Relationship Diagram) in this paper. The internet call systems are constructed to cooperate with conventional CTI call center. The internet phone calls occurred from the web browser of customer can be connected throughout VoIP gateway and PBX to many counselors. The internet call systems can provide various services; customer information service, escorted browsing service, text chatting service, text sharing service, conference service, and statistical analysis service.

• 정보관리학회지
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• 제10권1호
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• pp.15-30
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• 1993

하이퍼미디어 시스템은 멀티미디어 정보간의 연상적 관게를 링크, 노드개념에 입각하여 지원함으로써 기존의 데이타베이스 시스템이나 텍스트 검색 시스템의 한계성을 극복해 준다. 본 연구는 텍스트, 그래픽, 영상, 목소리/사운드 등의 멀티미디어 정보를 지원해 주는 하이퍼미디어 시스템을 설계, 구현하였고 시스템의 기능을 보여주기 위하여 성경과 성경 관련 정보에 적용하여 응용시스템을 구축하였다. 특히 본 시스템에서는 탐색과 브라우징 기능을 효율적으로 통합함으로써 하이퍼미디어 시스템의 정보검색 기능과 사용자 인터페이스를 높이도록 설계하였다. 국립중앙도서관에 제안한 고서용 MARC 포멧과 기술규칙을 기초로 그 특징적인 것을 요약 정리한 것이다.

• 정보관리학회지
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• 제16권4호
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• pp.75-94
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• 1999

색인은 데이터베이스에 저장된 문서를 효과적으로 검색하기 위한 정보검색시스템의 필수 기능이다. 컴퓨터의 발달로 전자정보가 점점 많아짐에 따라 데이터베이스에 저장해야할 문서가 대량화되고 있고, 이러한 대용량 문서를 색인하기 위해서는 많은 시스템 자원과 처리 시간을 필요로 한다. 따라서 본 논문에서는 대용량 문서를 적은 자원으로 짧은 시간에 색인할 수 있는 개선된 텍스트분할에 의한 색인기법을 제안한다. 제안한 색인기법은 실제 검색시스템에 적용하고, 실험을 통해 우수성을 증명한다.

• 한국통신학회논문지
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• 제22권11호
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• pp.2531-2542
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• 1997

This paper describes a method for region segmentation and string extractionin documents which are mixed with text, graphic and picture images by the use of the structural characteristic of connceted components. In segmentation of non-text regionas, with connection-characteristic functions which are made by structural characteristic of connected components, segmentation process is progressed. In the string extraction, first we organize basic-unit-region of which vertical and horizontal length are 1/4 of average length of connection components. Second, by merging the basic-unit-regions one other that have smaller values than a given connection intensity threshold. Third, by linking the word blocks with similar block anagles, initial strings are cresed. Finally the whold strings are generated by merging remaining word blocks whose angles are not decided, if their height and prosition are similar to the initial strings. This method can extract strings that are neither horizontal nor of various character sizes. Through computer exteriments with different style documents, we have shown that the feasibility of our method successes.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 하계종합학술대회 논문집
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• pp.699-707
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• 1999

It cannot be argued that speech is the most natural interfacing tool between men and machines. In order to realize acceptable speech interfaces, highly advanced speech recognizers and synthesizers are inevitable. Text-to-Speech(TTS) technology has been attracting a lot of interest among speech engineers because of its own benefits. Namely, the possible application areas of talking computers, emergency alarming systems in speech, speech output devices fur speech-impaired, and so on. Hence, many researchers have made significant progresses in the speech synthesis techniques in the sense of their own languages and as a result, the quality of currently available speech synthesizers are believed to be acceptable to normal users. These are partly why the MPEG group had decided to include the TTS technology as one of its MPEG-4 functionalities. ETRI has made major contributions to the current MPEG-4 TTS among various MPEG-4 functionalities. They are; 1) use of original prosody for synthesized speech output, 2) trick mode functions fer general users without breaking synthesized speech prosody, 3) interoperability with Facial Animation(FA) tools, and 4) dubbing a moving/animated picture with lib-shape pattern information.

• 산경연구논집
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• 제6권3호
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• pp.5-8
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• 2015

Purpose - This article's aim is to examine how the utilization of existing and future decision-support systems will lead to a change in the auditing process. Research design, data, and methodology - An information system is a special decision-support system that combines information obtained from various sources and communicates among them to help in assessing appropriate complex financial decisions. This paper analyzes techniques such as data and text mining as components of decision-support systems to be used in the auditing process. Results - We present views about how existing decision-support systems will lead to a change in audits. Auditors, who currently collect significant data manually, will in the future move towards management through complex decision-support systems. Conclusions - Although some internal audit functions are integrated into systems of continuous monitoring, the use of such systems remains limited. Thus, instead of multiple decision-support systems, a unified decision-support system can be deployed for this that includes sensors integrated within a company in different contexts (e.g., production, sales, and accounting) that continually monitors violations of controls, unusual patterns, and unusual transactions.

• 말소리와 음성과학
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• 제2권4호
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• pp.39-49
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• 2010

The purpose of this paper is to examine how Chinese speakers realize Korean intonation phrase (IP) boundary tones in the reading of a Korean text. Korean IP boundary tones play various roles in speech communication. They indicate prosodic constituents' boundaries while simultaneously performing pragmatic and grammatical functions. In order to express and understand Korean utterances correctly, it is necessary to understand the Korean IP boundary tone system. To investigate the IP boundary tone produced by Chinese speakers, we have specifically examined the type of boundary tones, the degree of internal pitch modulation of boundary tones, and the pitch difference between penultimate syllables and boundary tones. The results of each analysis were compared to the IP boundary tones produced by Korean native speakers. The results show that IP boundary tones were realized higher than penultimate syllables.

• 한국데이타베이스학회:학술대회논문집
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• 한국데이타베이스학회 1998년도 국제 컨퍼런스: 국가경쟁력 향상을 위한 디지틀도서관 구축방안
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• pp.383-394
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• 1998

본 연구에서 구축된 디지털도서관의 프로토타입은 디지털 리포지토리, 필터, 색인 및 검색, 클라이언트의 간단한 구조로 되어 있다. 디지털 리포지토리는 여러 가지 유형의 문서유형과 다양한 형태의 데이터베이스로 구성된다. 필터는 다양한 문헌의 포맷을 인식하고 문헌각각의 조직적인 요소를 지능적으로 구분하는 역할을 수행한다. 본 시스템은 관계형 데이터 베이스 관리시스템인 ORACLE과 ConText를 이용하여 구성되었으며 새로운 객체의 분석 및 조직화, 색인기술의 적용을 용이하게 처리할 수 있다.