• Proceedings of the Korean Society for the Gifted Conference
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• 2003.05a
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• pp.109-126
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• 2003

The Purpose of this study was to develop the instruments which can measure motivation as a component of Visual Artistic Giftedness with in elementary school period. This study prescribed the variable factors of measurement after abstract and classify the characteristics of Visual Artistic Giftedness through literature studies. And it produced instruments those are finally composed of 27 items through the preliminary test. They were evaluated in terms of content validity, construct validity, and reliability by implementing them to 679 elementary school children from the first to sixth grades Statistical analyses were carried out to verify the validities and reliability. Content validity was found to be satisfactory by expert’s evaluation on the test items. Construct validity was also found to be satisfactory through factor analyses which showed the four factors which the identification instruments were intended to measure such as, interest/ attitude/ taste, endurance/ concentration, curiosity/ imagination/ sensitiveness, aesthetic Concurrent validity was also found to be satisfactory with high coeffients of Barron-Welsh which were calculated as .76 in motivation, In conclusion, the instruments about motivation of Visual Artistic Giftedness during elementary school period developed by this study are highly reliable on its reliability and validity.

• Korean Journal of Health Psychology
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• v.14 no.3
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• pp.511-529
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• 2009

The purpose of this study was to develop and validate Korean Game Addiction Scale for children and adolescents. Data from a representative sample of 3,115 children and adolescents residing in Korea were analyzed to identify the factor structure and reliability of the scale. In addition, criterion-related evidence of validity (concurrent and convergent) was examined. Consistent with our theoretical assumptions, the Korean Game Addiction Scale revealed a stable higher order factor structure (second order-one factor, first order-seven factors), and the reliability of the scale was high (average Cronbach's alpha = .84, six week test-retest reliability = .75). The scale was also showed high levels of concurrent and convergent validity. Implications of the findings and directions for future research on game addiction are discussed.

• Korean Journal of Childcare and Education
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• v.9 no.6
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• pp.309-337
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• 2013

The purpose of this study was to validate Preschool Child Observation Record-II developed by High/Scope for Korean preschool children. The subjects of the study were 255 children aged three to six attending child care centers and their head teachers. They were observed for at least two months and completed the Korean version of Child Observation Record-II(K-COR-II). K-COR-II consisted of six categories and 32 items which had five-level-rubrics. The results from an exploratory factor analysis identified one dimension of the scale, there was no evidence of discriminant validity even after face validity was examined. The concurrent validity and internal consistency of the revised scale were relatively high. Also, the mean between the upper and lower groups with regard to item discrimination showed significant difference. It was concluded that K-COR-II can be used as a valid and reliable instrument to various aspects of preschool children's development.

• Journal of the Korea Society of Computer and Information
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• v.15 no.5
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• pp.113-124
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• 2010

In this study, the hybrid authorization quotation technique is based on the device ID for the integrity of the source region guarantee of user certificate, in order to improve the convenience and security for user in the hybrid PKI certificate Mechanism for authentication. The feature of the model in which it is presented from this paper is 5. First, because the user can select the policy himself in which it matches with each authentication situation and security level, the convenience can be improved. Second, the integrity of the source region of the user certificate can be guaranteed through the comparison of the DLDI Key, that is the hash-value of the device ID. Third, the security can be improved by continuously changing an encoding, and the value of the key in which it decodes through the EOTP Key. Fourth, the index value is added to a certificate, and the storage of a certificate is possible at the Multi-Device. Fifth, since the addi the inan aratus for the integrity of the source region guarantee of a certificate is not needed, the authentication process time can be reduced and the computational load of the certificate server can be reduced also.

• The Korean Journal of Archival Studies
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• no.30
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• pp.175-204
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• 2011

Electronic records are generated not only in public sector but also in private sector. Records will be used across the public-private boundary. The Certified e-Document Authorities(CeDAs) may keep electronic documents in private sector for preservation and evidence, like the official Record Management Systems for Public sector. A CeDA is the Trusted Third Party (TTP) as a business to be entrusted and proof interchanging documents between parties. This CeDA system could be sustainable only if the CeDA earn the enough sales through enough uses. And yet, all the eight CeDA companies have not had enough users. How to utilize CeDAs is one of the hot issues in this area. In this paper, We analyze the threat to trustworthiness of CeDA due to payment of only one party among others, and describe the difficulty in use of CeDA for an individual user. These things make CeDAs cannot have enough users. To do address these, We expand the boundary of relevant parties for a document, present a delegate-establishing option under a joint name, show the needs of identifying and notifying minimum relevant parties, and suggest the proxy parties to help the individual users.

• Journal of KIISE
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• v.43 no.1
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• pp.27-33
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• 2016

Virtualization has become one of the most helpful techniques in computing systems, and today it is prevalent in several computing environments including desktops, data-centers, and enterprises. However, since I/O layers are implemented to be oblivious to the I/O behaviors on virtual machines (VM), there still exists an I/O scalability issue in virtualized systems. In particular, when a multi-queue solid state drive (SSD) is used as a secondary storage, each system reveals a semantic gap that degrades the overall performance of the VM. This is due to two key problems, accelerated lock contentions and the I/O parallelism issue. In this paper, we propose a novel approach, including the design of virtual CPU (vCPU)-dedicated queues and I/O threads, which efficiently distributes the lock contentions and addresses the parallelism issue of Virtio-blk-data-plane in virtualized environments. Our approach is based on the above principle, which allocates a dedicated queue and an I/O thread for each vCPU to reduce the semantic gap. Our experimental results with various I/O traces clearly show that our design improves the I/O operations per second (IOPS) in virtualized environments by up to 155% over existing QEMU-based systems.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.634-636
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• 2003

Mobile IPv6는 차세대 인터넷 프로토콜인 IPv6를 기반으로 단말기기간에 이동성을 제공하는 프로토콜이다. 하지만 Mobile기기간의 정보 유출 및 서비스 거부 등과 같은 공격에 대해 보안 서비스의 필요성이 대두되었다. 이에 IPSec 프로토콜은 이러한 요구사항을 만족시켜 줄 수 있는 다양한 보안 서비스를 제공함에 따라 Mobile IPv6에서는 필수 구현사항으로 채택하고 있다. 이에 IPSec 프로토콜을 하드웨어로 모듈화함으로써 소프트웨어상에서 발생하는 단점을 제거하고. 하드웨어상의 Mobile기기와도 손쉽게 인터페이스 할 수 있도록 구현하였다. IPSec Core Module은 AH 및 ESP를 각각 송수신하는 모듈과 IPSec Control 모듈로 구성 하였으며. IPv6 테스트 망을 이용하여 전용 FPGA보드상에서 그 기능을 검증하였다.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.280-283
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• 2010

현재 제한적 본인 확인제 실행으로 게시판에 글을 쓰거나 댓글을 달 때 최초 1회에 한하여 본인 인증을 받아야 하기 때문에 사용자는 해당 사이트에 회원가입을 하거나 그에 상응하는 개인정보를 제공해야한다. 이에 정부는 무분별한 주민번호 도용을 막기 위해 주민번호대체수단 의무화를 2007년에 실행하여 아이핀, 공인인증서를 통한 본인확인 대책을 내놓았으나 허술한 본인인증 절차로 인해 아이핀 역시 도용당하고 있는 실정이다. 본 논문에서는 가상 아이디 발급으로 적절한 익명성을 제공함과 동시에 경로 구성 기법을 통하여 악성 댓글 및 의견글 달기를 막기 위한 조건부 추적이 가능한 익명 게시판에 대해서 소개하도록 한다.

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2001.05a
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• pp.66-92
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• 2001

지난 및 년간 정부에서는 소각시설에서 배출되는 다이옥신 등 대기오염물질을 저감하기 위하여 많은 노력을 기울여 왔다. 먼저, '97년 7월 17일, 폐기물관리법 시행규칙을 개정하여 생활폐기물 소각시설에 대한 다이옥신 규제기준$^{1)}$ 을 '99년 7월 1일부터 기존 소각시설에 대해서는 0.5ng-TEQ/N㎥을 신설 소각시설에 대해서는 0.1ng-TEQ/N㎥으로 제정했으며, 또한 소각시설의 광역화, 신규 소각시설의 설치비용 및 기존 소각설비의 개ㆍ보수비용의 일부에 대한 국고지원, 소각처리 기술지원단에 의한 기술평가 및 자문활동, 다이옥신 공인측정ㆍ분석기관의 지정ㆍ고시, 생활폐기물 소각시설 설치ㆍ운영지침의 제정 등 짧은 기간임에도 불구하고 소각시설에서 배출되는 다이옥신을 저감하기 위하여 각종 정책이나 제도를 시행 또는 개선해왔다. (중략)

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.514-516
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• 2005

CBD(Component Based Development)는 장기간에 걸쳐 발전된 소프트웨어 개발의 한 형태이며, 이미 표준화되거나 공인되지 않았지만 실제로 모든 기업들은 컴포넌트를 나름대로 제작하거나 이미 잘 개발되어진 컴포넌트를 재사용하여 자체 프로젝트에 재활용하므로써 최소의 개발비로 표준화를 추구하는 한편 최대의 기능과 신속한 개발로 소프트웨어의 품질과 생산성 향상을 도모하고 있다. 본 논문에서는 레거시 시스템을 활용하여 컴포넌트로 되어 있지 않은 프로그램을 컴포넌트화 함은 물론 기존 애플리케이션에 존재하는 컴포넌트를 래핑하여 재사용 가능한 서비스를 생성, 재공하기 위한 CBD 기반의 회계처리 응용 시스템을 설계 및 구현한다. 제안된 회계처리 응용 시스템 APAS(Accounting Process Application System) 모델은 시스템 구축 개발 기간의 단축과 관리 및 유지보수를 쉽게 하여 업무의 효율성을 높이고, 레거시 시스템을 재활용하여 신규 개발시 우려되는 위험도를 낮추어 소프트웨어 생산성 제고 효과도 얻을 수 있다.