Real-time Ray-tracing Chip Architecture

Yoon, Hyung-Min,Lee, Byoung-Ok,Cheong, Cheol-Ho,Hur, Jin-Suk,Kim, Sang-Gon,Chung, Woo-Nam,Lee, Yong-Ho,Park, Woo-Chan The Institute of Electronics and Information Engin 2015 IEIE Transactions on Smart Processing & Computing Vol.4 No.2

In this paper, we describe the world's first real-time ray-tracing chip architecture. Ray-tracing technology generates high-quality 3D graphics images better than current rasterization technology by providing four essential light effects: shadow, reflection, refraction and transmission. The real-time ray-tracing chip named RayChip includes a real-time ray-tracing graphics processing unit and an accelerating tree-building unit. An ARM Ltd. central processing unit (CPU) and other peripherals are also included to support all processes of 3D graphics applications. Using the accelerating tree-building unit named RayTree to minimize the CPU load, the chip uses a low-end CPU and decreases both silicon area and power consumption. The evaluation results with RayChip show appropriate performance to support real-time ray tracing in high-definition (HD) resolution, while the rendered images are scaled to full HD resolution. The chip also integrates the Linux operating system and the familiar OpenGL for Embedded Systems application programming interface for easy application development.

전자정부가 디지털정보격차에 미치는 영향

정윤모(Yoon-mo Cheong),최상옥(Sang Ok Choi) 한국기술혁신학회 2019 기술혁신학회지 Vol.22 No.5

4차산업혁명과 더불어 첨단 ICT 도입에 따라 전자정부는 진화되고 있지만, 기존 연구들은 ICT 기술측면으로 분석 초점으로 맞추어 ICT기술 발전이 오히려 디지털정보격차가 더욱 발생된다고 보고 있다. 이에 본 연구에서는 ICT기술 발전 측면 보다 ICT를 활용한 전자정부에서 실질적으로 디지털정보격차에 영향을 줄 수 있는 요인을 살펴보고자 한다. 전자정부의 온라인서비스와 온라인 국민참여지수를 통해 디지털정보격차의 요인을 살펴본 결과, 정부 중심의 온라인서비스 제공보다 국민이 참여하는 온라인서비스가 디지털정보격차에 도움이 준다는 것을 확인할 수 있었다. 전자정부의 온라인서비스 보다 온라인참여가 높을수록 디지털정보격차 해소에 연관성이 있다는 것을 의미한다. 이러한 현상은 전자정부의 공급자 중심의 서비스의 양적 확대가 아닌 수요자 중심의 국민이 참여할 수 있는 서비스 제공이 필요하다는 시사점을 가지고 있다. 본 연구결과는 전자정부의 주요요인이 디지털정보격차에 긍정적인 영향을 준다는 것을 제시함으로써 국가정책 및 서비스 구현과 전자정부 시스템을 구축시 고려해야 할 사항을 전략적으로 시사점을 제시한다. It has been suggested that digital divide occurs in demographic and socioeconomic environments of the country. On the contrary, the E-Government was expected to provide information services to the people in a balanced manner, improve the quality of the people’s life by participating in government policies, and enhance the people’s understanding by sharing more diverse information. So far many studies have studied digital divide by economic and educational level with demographic characteristics. E-government is evolving with the introduction of advanced ICT along with the fourth industrial revolution. But previous studies have focused on the analysis focus on the ICT technology side that the development of ICT technology leads to a digital divide. Therefore, this study will examine the factors that can actually affect the digital divide in E-government using ICT rather than the development of ICT technology. This study established 93 national panels and conducted self-correlation verification and demonstration analysis by year through the main determinants of e-government and digital divide. As a result, it has a positive effect on bridging the digital divide as E-participation, E-urbanization and GNI(Gross National Income). In addition, GNI groups are dividie into high-income, middle-income and low income countries. It was confirmed that there is a difference in GNI groups. The digital divide was studied through the E-service and E-participation indexes. As a result it was found that E-participation helps the digital divide than E-serivce of government. It has implications that is necessary to provide consumer services in the E-pariticipation rather than quantitatively expanding the E-service. This study suggests that major factors of E-government have a positive effect on digital divide then suggesting strategic implications for the consideration of national policy and E-government system.

웹 아카이브 OASIS 수집 콘텐츠의 분석

윤정옥,Yoon, Cheong-Ok 한국도서관정보학회 2014 한국도서관정보학회지 Vol.45 No.4

The purpose of this research is to examine the characteristics and current status of OASIS, a web archive, developed and operated by the National Library of Korea. From December 2013 to November 2014, an analysis of a numerical growth and subject distribution of 55,581 websites archived at OASIS shows many problems in quality, including an overwhelming proportion of 'Social Science' and its subclass 'Politics', consequential lack of balance in subject distribution, lack of authority or scholarly value of some contents, unclear application of selection criteria for personal creators/publishers, and inaccurate and overlapping statistics. Despite an impressive growth in quantity, immediate improvement of selection policies and quality control is needed.

도서관 목록의 지식 확산 도구 역할에 관한 시론(試論) : WorldCat을 중심으로

윤정옥,Yoon, Cheong-Ok 한국도서관정보학회 2012 한국도서관정보학회지 Vol.43 No.1

The purpose of this study is to examine the possibility of using the WorldCat, an International Union Catalog operated by OCLC as a tool for analyzing the trend of knowledge distribution in libraries around the world. In this study, four subject keywords, that is, Korea, Korean, Japan, and Japanese, were used to search materials related to Korea and Japan, and four facets, including medium, genre, language, and user level, were used to categorize search results from the WorldCat. The result shows that information resources related to Korea held by libraries around the world are only a little more than a third of Japan-related information resources. Especially Korea-related information resources for juveniles are less in numbers and lack in diversity in languages, media and genres, when compared with Japan-related information resources. Also an examination of two bibliographic records demonstrates that viewpoints expressed in user contributed reviews might affect diffusion of knowledge on certain subjects in the Next Generation Library Catalog.

미국의 '한 책, 한 도시' 독서운동의 동향과 특성의 분석

윤정옥,Yoon Cheong-Ok 한국문헌정보학회 2005 한국문헌정보학회지 Vol.39 No.3

'One Book, One City' reading campaign is one of the major reading campaigns, successfully conducted by public libraries in this century. The purpose of this study is to evaluate the significance of 'One Book, One City' reading campaign, as an innovative, continuing, and collective reading campaign by analyzing its growth and diffusion during the past six years. Also, analyzed are the themes. genres, and publication dates of the books and the characteristics of authors selected for 'One Book' in order to understand the cultural, social, and community-wide trend and objectives of 'One Book, One City' reading campaigns. An analysis of lists of 'One Book, One City' Reading Promotions Projects' available from the website of the Library of Congress, the Center for the Books, and bibliographic records of ninety books from LC OPAC, shows the preference for books recently published, significance of biographies and biographical fictions, and focus on the themes which help people better understand a multi-cultural and multi-racial society.

'한 책, 한 도시' 독서운동의 실행단계별 특성의 분석 - 국내외 사례를 중심으로 -

윤정옥,Yoon, Cheong-Ok 한국문헌정보학회 2007 한국문헌정보학회지 Vol.41 No.1

In this study, examined are the characteristics of 'One Book, One City' reading campaigns conducted in Seattle. Chicago, and 'The Big Read', a nationwide 'One Book' campaign, supported by the NEA, in the U.S.A. and Seoul and Cheongju in Korea. Some differences as well as similarities were found in the goal setting, selection of books, strategies for reading and discussion, and programs of these 'One Book' reading campaigns. While, as a mass reading event, 'One Book' reading campaigns in various communities share the goal of promoting literacy and communication through reading and discussion, each 'One Book' campaign seems to show uniqueness in the criteria of book selection, reading and discussion guides, and the activities and Programs. which make up cultural contents.

미국의 '한 책, 한 도시' 독서운동 선정 책의 분석

윤정옥,Yoon, Cheong-Ok 한국도서관정보학회 2012 한국도서관정보학회지 Vol.43 No.4

The purpose of this study is to understand the direction of 'One Book, One City' community reading campaign by analyzing the characteristics of selected books, including their classification numbers, subject headings, publication dates, and genres. An analysis of lists of 'One Book, One City' Reading Promotions Projects' available from the website of the Library of Congress, the Center for the Books, and bibliographic records of 210 books from LC OPAC, shows the preference for the recently published American literatures in the genre of Bildungsromane and domestic fiction which describe the life of people with multi-cultural or ethnic backgrounds. It is confirmed that 'One Book, One City' community reading campaign has been consistently oriented to achieve the understanding and integration of a community by reading and discussion of one book.

국립중앙도서관과 미국의회도서관 OPAC 디스플레이의 비교 연구

윤정옥,Yoon, Cheong-Ok 한국문헌정보학회 2006 한국문헌정보학회지 Vol.40 No.1

The purpose of this study is to analyze the characteristics of OPAC displays of the National Library of Korea and the Library of Congress. based on the 'OPAC Display Guidelines(Draft)' published by IFLA. Discussed are such topics as a basic search process and the headings list, a brief display and the arrangement of bibliographic records, a brief record and a full record, use of terms and labels. link between records, and organization of screens for the OPAC display. It is strongly suggested that when compared with the LC's OPAC, the OPAC display of the National Library of Korea should be much improved by following the recommendations of the 'OPAC Display Guidelines(Draft)'.

고서목록 데이터베이스의 검색 인터페이스에 관한 연구 - 검색 기능을 중심으로 -

윤정옥,Yoon, Cheong-Ok 한국도서관정보학회 2011 한국도서관정보학회지 Vol.42 No.2

The purpose of this study is to compare and analyze the functions and characteristics of search interfaces of Korean Old and Rare Collection Information System(KORCIS) and Korean History Online. The checklist of OPAC functionalities proposed by Breeding was used to examine eleven functions of these systems. Both system provide the following functions: Search by keywords; Boolean operators in queries; Order results chronologically; Modify search without re-keying the initial terms ; Search within result sets ; and Ability to limit results to an individual library or education. They do not provide such functions as Browse by author, title, subject and View and recall the search history for the current session. Adoption of standard OPAC and next-generation catalog functionalities, in-depth understanding of user needs and information seeking behaviors, and the improvement of subject access to these systems are suggested in this study.

차세대 도서관 목록 사례의 고찰

윤정옥,Yoon, Cheong-Ok 한국도서관정보학회 2010 한국도서관정보학회지 Vol.41 No.1

The purpose of this study is to investigate the major features of Next Generation Library Catalogs. 'Next Generation Melvyl Pilot' of University of California Library System and 'SearchWorks' of Stanford University Library are examined. While the former is developed, based on OCLC WorldCat Local, the latter is based on the Blacklight, an Open Source Catalog Software. Both commonly provide the features, including enriched contents, facet navigation, keyword searching, relevancy ranking of search results, and user contribution, etc., but some functions vary in scopes and contents. Also, it seems that both are in process of development rather than complete implementations.