• Digital Contents
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• no.2 s.33
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• pp.67-72
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• 1996

초고속정보통신 홍보부문 전담기관인 한국정보문화센터에서는 지난 1월 초고속정보통신 홍보용 CD-ROM 타이틀을 제작하여, 초고속계획과 관련된 정부/공공기관, 각급대학, 언론기관 등에 배포하였다. 이 타이틀은 초고속정보통신기반구축이라는 국가적 사업에 대해 일반 국민과 산,학,연 등 관계자들의 이해의 폭을 넓히고 다함께 참여할 수 있게 하는데 도움이 되도록 그 추진방향과 세부계획을 보여주고 있다. 그리고 국내외의 초고속정보통신망구축계획과 관련된 정보 및 가상으로 꾸며본 2005년의 '초고속 씨' 일가족의 하루일과 등을 생생한 멀티미디어 정보로 표현하고 있어 보는 이로 하여금 흥미로움을 더해주고 있다. 아울러 인터넷의 설치 및 이용, 각종정보내용 및 사이트 소개, 인터넷 검색 브라우저의 소개 및 특성 등을 초보자가 알기 쉽게 설명하고 있으며, 사용자가 혼자서 즐길 수 있는 몇종류의 재미있는 게임까지 수록하고 있어서 타이틀 제작의 세심함을 엿볼 수 있다.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.1
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• pp.64.2-64.2
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• 2018

지금으로부터 100년 전, 하버드대학교 천문대에서 에드워드 찰스 피커링과 윌리어미나 플레밍, 애니 점프 캐넌 등의 여성 천문학자들이 분광관측 자료를 가지고 헨리 드레이퍼 목록(HD catalog)을 만들기 시작했다. 이는 항성분류의 근간을 마련하고 현대 천문학의 본격적인 시작을 알리는 일이었다. 현재 국립청소년우주센터는 이를 기념하여, 디지털 이미지로 보유중인 1975년에서 1999년에 걸쳐 발간된 "Michigan catalog of HD stars"의 사진건판을 활용한 연구를 진행 중이다. 본 센터를 방문하는 청소년이 100년 전 그들과 한 것과 같은 고전적 항성 분류과정을 체험하며, 별의 스펙트럼을 이해하고 우주를 이해하는데 필수적인 분광학에 대한 이해를 높이길 기대한다. 이를 위한 선행 작업인 대물프리즘 사진건판 이미지에서 별의 스펙트럼을 추출하는 과정을 소개하고자 한다.

• Journal of the Semiconductor & Display Technology
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• v.22 no.2
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• pp.120-127
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• 2023

Recently, metaverse has attracted great attention worldwide with the development of related technologies and the demand for on-tact systems. The ideal metaverse should constitute a virtual world more similar to the realistic society with physical interactions. However, there are many constraints when we construct a virtual world using the existing commercialized metaverse platform. In this paper, we design and implement a university campus-based metaverse which minimizes the constraints, and create a virtual environment maps very similar to the real-world using Unity engine, Photon cloud and Playfab SDK for multi-user accessible to virtual world as a personal avatar. Also, this work includes attractive interaction based on exchange between users. Lastly, we illustrate our implemented metaverse works on Android phone, and it works without difficulty in terms of performance.

• Korean Journal of Plant Taxonomy
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• v.50 no.4
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• pp.453-474
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• 2020

Here, we present an updated checklist based on voucher specimens of vascular plants for Gasan Mt. which is located in Chilgok-gun, Gyeongsangbuk-do, South Korea. The list includes 322 taxa in 212 genera and 81 families of vascular plants, of which 14 are endemic, six are rare plants, 48 are floristic target species, and 14 are considered naturalized in Korea. Based on voucher specimens, Gasan Mt. was the southern limit of Cimicifuga heracleifolia var. bifida Nakai and Iris odaesanensis Y. N. Lee on the Korean peninsula. Moreover, we confirmed a hybrid plant deriving from two Iris parents, I. minutoaurea Makino and I. odaesanensis, in a mountain fortress of Gasan Mt. We also present online databases including 325 voucher specimens deposited at the Korea Institute of Oriental Medicine (KIOM; http://oasis.kiom.re.kr/herblib). This study has great significance as the first floristic study of Korean plants sharing virtual specimens online.

• Journal of Information Management
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• v.28 no.2
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• pp.20-53
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• 1997

To use SGML, which is international standard of markup language to construct fulltext database in digital libraries, the DTD is developed first. It is based on structure analysis of document. This study develops the SGML DTD for Korean document through document structure analysis of the Journal of the Korean Society for Information Management.

• The Korean Journal of Archival Studies
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• no.70
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• pp.157-187
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• 2021

Broadcasting and audiovisuals are the easiest audiovisuals to access in everyday life and are shared through the media by recording the times. Overseas, independent broadcasting and audiovisual archives are already in operation under the legal system. As the domestic broadcasting and audiovisual industries continue to grow in size and are drawing global attention, the establishment and operation of public broadcasting and audiovisual archives need to be discussed in more detail. In particular, it is clear that the legal device is a task that must be preceded as the basis for the establishment of public broadcasting and audiovisual archives. To this end, this study first looked at the Digital Archive Center, which was operated in the 2000s. In addition, the cause of the dismantling of the Digital Archive Center was considered as the absence of a legal device, and the case of the Institut national de l'audiovisuel(INA), which has been operating on a legal basis for a long time, was investigated. INA is a representative example of implementing a lead-based system in the broadcasting and audiovisual fields, and has been introduced several times through previous studies, but tends to be focused on user services. Therefore, in this study, the analysis was focused on legal factors supporting the operation of INA. Finally, in order to realize the Public Broadcasting and Audiovisual Archive discussed in the previous study, I would like to suggest a legal device for the establishment of Public Broadcasting and Audiovisual Archive in Korea.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.33 no.3
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• pp.116-123
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• 2023

A high intensity focuses ultrasound (HIFU) is one of the emerging technologies in the biomedical field. The piezoelectric HIFU transducer is a device that utilizes the thermal energy generated by high ultrasound energy. Recently an operating frequency of the HIFU transducer is to expand above a 7 MHz. In this study, the acoustic pressures and temperature distributions in the tissue that generated by the HIFU transducer at 10 MHz were calculated with the finite element method. In addition, the pressure focusing characteristics of the device were analyzed. The geometrical variables are the piezomaterial thickness, lens shape, water height, and film thickness. The results shown that the acoustic pressure increased and saturated gradually when the height/radius (H_L/R_L) ratio of the lens increased. Moreover, the focal area was gradually decreases with H_L/R_L ratio of the lens. In case of the optimized HIFU transducer, the maximum pressure and temperature were analyzed about 19 MPa and 65℃ respectively. And the -3 dB focused distances in the axial and lateral direction are around 2.3 mm and 0.23 mm respectively.

• Journal of the Korean Society for Library and Information Science
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• v.58 no.1
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• pp.255-283
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• 2024

In this study, as a preliminary research to effectively support data-driven R&D of researchers, we analyzed the academic information and data requirements for researchers to discover new types of academic information and datasets, and to propose directions for academic information services. To achieve the research objectives, we conducted an exploratory case study involving five researchers and administered an online survey among ScienceON users to glean insights into data-driven R&D behaviors and information/data requirements. As a result, researchers relatively referred to academic papers, datasets and software information from academic papers or conference materials. Moreover, the methods and pathways for acquiring data, as well as the types of data, varied across different subject areas. Researchers often faced challenges in data-driven R&D due to difficulties in locating and accessing necessary datasets or software such as learning models. Therefore it has been analyzed that for future support of data-driven R&D, there is a need to systematically construct datasets by subject. Additionally, it is considered necessary to extract and summarize dataset and related software information in conjunction with academic papers.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.20 no.4
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• pp.51-65
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• 2009

This study attempted to investigate users' information needs in an educational research library, which delivers web-based digital reference services to library users, by analyzing reference questions asked by remote users. A total of 242 questions from two electronic bulletin boards was examined in terms of 6 types of questions asked and 23 subareas of education. The study found that 56.1% of reference questions on the library bulletin board were pure reference questions in curriculum, textbooks and teaching & instruction. Suggestions for effective use of digital reference services were made: easy access to menu services, use of web forms, development of digital reference systems providing search functions and response functions.

• Journal of the Korean Vacuum Society
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• v.22 no.6
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• pp.321-326
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• 2013

The effect of rapid thermal annealing (RTA) on the optical properties of digital-alloy InGaAlAs multiple quantum well (MQW) structures have been investigated by using photoluminescence (PL) and time-resolved PL measurements as a function of RTA temperature. The MQW samples were annealed from $700^{\circ}C$ to $850^{\circ}C$ for 30 s in a nitrogen atmosphere. The MQW sample annealed at $750^{\circ}C$ exhibited the strongest PL intensity and the narrowest FWHM (Full width at half maximum), indicating the reduced nonradiative recombination centers and the improved interfaces between the wells and barriers. The MQW samples annealed at $800^{\circ}C$ and $850^{\circ}C$ showed the decreased PL intensities and blueshifted PL peaks compared to $750^{\circ}C$-annealed sample. The blueshift of PL peak with increasing RTA temperatures are ascribed to the increase of aluminum due to intermixing of gallium (Ga) and aluminum (Al) in the interfaces of InGaAs/InAlAs short-period superlattices. The decrease of PL intensity after annealing at $800^{\circ}C$ and $850^{\circ}C$ are attributed to the interface roughening and lateral composition modulation caused by the interdiffusion of Ga and Al and indium segregation, respectively. With increasing RTA temperature the PL decay becomes slower, indicating the decrease of nonradiative defect centers. The optical properties of digital-alloy InGaAlAs MQW structures can be improved significantly with optimum RTA conditions.