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김장원,Kim, Jang-Won 한국정보통신학회 2011 한국정보통신학회논문지 Vol.15 No.12
In this paper, we studied that the EZW algorithm based in HWT was proposed effective compression technique of wavelet transformed image. The proposed Haar-EZW algorithm is that image was coding by zerotree coding technique using self-similarity of HWT coefficients. If the HWT coefficient is larger than the threshold, that is coding to POS. If the HWT coefficient is smaller than the threshold, that is coding to NEG. If the HWT coefficient is larger than the root of zerotree, that is coding to ZTR. If the HWT coefficient is smaller then the threshold, and if that is not the root of zerotree, that is coding to IZ. This process is repeated until all the HWT coefficients have been encoded completely. This paper is compared Haar-EZW algorithm with Daubechies and Antonini. As the results of compare, it is shown that the PSNR of the Haar-EZW algorithm is better than Daubechies's and Antonini's. 본 논문에서는 Haar Wavelet Transform(HWT)에 기반한 EZW 알고리즘을 적용하여 효율성 있는 영상 압축방법을 제시하였다. 제안된 Haar-EZW 알고리즘은 입력 영상을 자기유사성이 있는 상관관계를 사용한 HWT 계수를 이용하여 제로트리 부호화하는 코딩방법이다. HWT 계수가 임계값보다 크면 POS로 부호화되고, 임계값보다 작다면 NEG로 부호화된다. HWT 계수가 제로트리의 제곱근보다 크다면 ZTR로 부호화되고, HWT 계수가 임계값보다 적고 제로트리의 제곱근이 아니라면 IZ로 부호화된다. 모든 HWT 계수가 완전하게 부호화돨 때까지 이 프로세스는 반복된다. 본 논문에서는 제안된 Haar-EZW 알고리즘을 Daubechies, Antonini와 비교하였다. 그 결과로 Haar-EZW 알고리즘의 PSNR이 Daubechies, Antonini보다 우수한 것으로 나타났다.
유사성 비교를 통한 RDB의 참조 무결성 관계 추출 알고리즘
김장원,정동원,김진형,백두권,Kim, Jang-Won,Jeong, Dong-Won,Kim, Jin-Hyung,Baik, Doo-Kwon 한국시뮬레이션학회 2006 한국시뮬레이션학회 논문지 Vol.15 No.3
XML is rapidly becoming technologies for information exchange and representation. It causes many research issues such as semantic modeling methods, security, conversion far interoperability with other models, and so on. Especially, the most important issue for its practical application is how to achieve the interoperability between XML model and relational model. Until now, many suggestions have been proposed to achieve it. However several problems still remain. Most of all, the exiting methods do not consider implicit referential integrity relations, and it causes incorrect data delivery. One method to do this has been proposed with the restriction where one semantic is defined as only one same name in a given database. In real database world, this restriction cannot provide the application and extensibility. This paper proposes a noble conversion (RDB-to-XML) algorithm based on the similarity checking technique. The key point of our method is how to find implicit referential integrity relations between different field names presenting one same semantic. To resolve it, we define an enhanced implicity referentiai integrity relations extraction algorithm based on a widely used ontology, WordNet. The proposed conversion algorithm is more practical than the previous-similar approach. XML은 정보 교환과 표현을 위해 빠르게 발전해 오고 있는 기술이다. XML을 통한 시멘틱 모델링 방법론, 보안, 다른 모델들과의 상호 운용성을 위한 변환과 같은 많은 연구들이 이슈화 되었다. 특히, 실질적인 응용분야의 가장 중요한 이슈는 XML 모델과 관계형 모델들과의 상호 운용성을 위해 많은 방법들에 제기되어 왔다. 하지만, 여전히 몇 가지 문제점이 있다. 대부분의 기존의 방법들은 묵시적인 참조 무결성 관계를 고려하지 않기 때문에, 부정확한 데이터 전달이 야기된다. 데이터베이스에서 하나의 의미가 정의 될 때 오직 하나의 이름만 가진다는 제약조건하에서 위의 문제를 해결하기 위한 한 가지 방법이 제안되었다. 하지만, 실제 데이터베이스에서 응용과 확장을 위해서 이 제약사항을 적용할 수는 없다. 그래서 이 논문에서는 유사성 검사 기법을 기반하는 한 RDB-to-XML 변환 알고리즘을 제안한다. 이 방법의 핵심은 하나의 같은 의미에 대해 다른 이름으로 표현되는 속성들 간의 묵시적인 참조 무결성 관계를 추출하는 알고리즘을 정의하였다. 제안된 변환 알고리즘은 이전의 유사한 접근 방법 보다 더욱 실질적이다.
김장원 ( Jang Won Kim ) 시학과 언어학회 2013 시학과 언어학 Vol.25 No.-
This article is Research of curriculum for practical writing. There are no sufficient study and discussion of practical writing. But, society ask for practical writing repeatedly. This contradictory situation is due to the prejudice of practical writing This article gets out of the prejudice of practical writing and sets its sight on building scientific curriculum. The practical writing seeks not only practical effect but also self-examination and providing a blueprint for the future. Seeking practical effect is communication. Then, the first thing we have to do is know who you are to write is to a letter of self-introduction which is a typical example of practical writing. Hence, within limits, we can express ourself to others effectively. This process confirm the meaning of being inherent self-examination in a letter of self-introduction, Furthermore, when we keep up our curriculum build on this, the road map of campus life is means a great deal. This is means a great deal not only campus life but also constructing life plan. Organized letter of self-introduction centers about this process. Especially, this process improves the capability of writing paper and the ability to express for selection key words and structured capacity. In future, we need to develop various curriculum through progressing study for the practical writing.
관광 이벤트가 개최지 브랜드 개성 이미지 및 사후반응에 미치는 영향연구 -R-16 Korea 2011 세계비보이대회 한국대표선발전을 중심으로 -
김장원 ( Jang Won Kim ) (사)한국마이스관광학회(구 한국컨벤션학회) 2013 MICE관광연구 Vol.13 No.2
This study aimed to examine the effect of the brand of event destination on attendees` brand image recognition by analyizing the relationship between the level of recongnition brand character and the intention to revisit. in order to enhance the competive advantage of the event and tourism industry. The Brand image of the event destination was positively related to the percieved level of the brand character. The higher the number of participants percieved the attractiveness of character of Brand image, the stronger they expressed intentions to revisit and recommend the event destination the research could be utilized as an effective marketing tool to attract more participants and tourists in regional events