• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 가을 학술발표회논문집(I)
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• pp.413-418
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• 2000

The test results on the deterioration process of concrete under single and combined action of chloride penetration have been obtained. Within the test period of 15 weeks, it is seen that the internally penetrated chloride ion contents are slightly less in the combined action of NaCI and $Na_2SO_4$ than the single action of NaCI. Also the theoretical prediction of chloride penetration based on measured diffusion coefficient agress well with the test data of single deterioration process but disagress with that of combined process. Therefore it should be needed that improved chloride diffusion model for the combined deterioration process.

• 한국멀티미디어학회논문지
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• 제10권12호
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• pp.1704-1713
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• 2007

Contents industry is growing into a versatile area whose contents can be embodied through not only traditional media such as theater and TV, but also new ones such as the internet, mobile unit, PDA, DMP, etc. In addition, highly advanced computer technology and contents are harmoniously combined for image development featuring multi-channels, which produces various contents, and thus, creating synergy effects with other key industries such as IT, strengthens the domestic economy as an industry of value expansion and new high value items. To this end, this study is to present development plans that are highly productive and valued to domestic contents development companies. For this, the focus was put on the fact that concurrent engineering, which is the mechanism bringing very beneficial effects to existing analog product development processes, and the team system have significant, positive effect on the company productiveness and competitive market values among digital contents related companies, especially contents businesses.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2004년도 춘계 학술발표대회 논문집
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• pp.202-203
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• 2004

• 한국콘텐츠학회지
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• 제14권3호
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• pp.14-19
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• 2016

• 한국콘텐츠학회논문지
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• 제6권11호
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• pp.225-234
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• 2006

본 논문에서는 콘텐츠 보호의 암호화를 위해 ECC, MD-5, AES를 통합한 보안 프로세서를 SIP (Semiconductor Intellectual Property)로 설계하였다. 각각의 SIP는 VHDL RTL로 모델링하였으며, 논리합성, 시뮬레이션, FPGA 검증을 통해 재사용이 가능하도록 구현하였다. 또한 ARM9과 SIP들이 서로 통신이 가능하도록 AMBA AHB의 스펙에 따라 버스동작모델을 설계, 검증하였다. 플렛폼기반의 통합 보안 SIP는 ECC, AES, MD-5가 내부 코어를 이루고 있으며 각각의 SIP들은 ARM9과 100만 게이트 FPGA가 내장된 디바이스를 사용하여 검증하였으며 최종적으로 매그나칩 $0.25{\mu}m(4.7mm{\times}4.7mm$) CMOS 공정을 사용하여 MPW(Multi-Project Wafer) 칩으로 제작하였다.

• 환경위생공학
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• 제11권1호
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• pp.45-55
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• 1996

An experimental research was conducted in order to study the combined treatment o of municipal landfill leachate and municipal sewage. The landfill leachate was that of Nanjido landfill site, and the municipal sewage was that of Chungnang municipal sewage treatment plant in Seoul. Several sets of bench~scale sequencing batch reactor(SBR) were used as e experimental apparatus. Specially investigated items in this experiment were the removal efficiency of substrate and the influence of treatment time. The experiment lasted for about 2 years. The result are as follows ; 1. The characteristics of leachate were pH 7.5~8.2, BOD 80~336mg/L, COD 908~1,460mg/L, NH3-N 1,409~2,330mg/L, T~P 2.7~7.lmg/L, Cl~3,540~4,085mg/L, a and heavy metals are a very small amount. And the characteristics of sewage were pH 6.9~7.3, BOD 78.4~129.3mg/L, COD 121.2~305.0mg/L, T~N 14.9~36.4mg/L, T-P 2.3~8.9mg/L. 2. The treatability of leachate alone was not treat well. So for the good treatment of leachate, it was necessary to deal with the pretreatment before bi이ogical treatment and a combined treatment of municipal sewage. 3. The various contents of the leachate were 5%, 10%, 30%, and 50%, and the removal efficiency of COD was 86.0%, 82.8%, 60.6%, and 31.7%. The maximum content of the leachate which could be sucessfully treated by SBR in the combined treatment was 10% of that of sewage. And the removal efficiency of COD increased n notably, as its treatment time increased. 4. The various contents of the electrolytic treated leachate were 5%, 10%, 30%, and 50%, and the removal efficiency of COD was 89.9%, 86.1%, 79.2%, and 69.8%. The maximum content of the leachate which could be sucessfully treated by SBR in the combined treatment was 30 % of that of sewage. And the removal efficiency of C COD increased notably, as its treatment time increased.

• 정보교육학회논문지
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• 제16권3호
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• pp.373-382
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• 2012

컴퓨팅 기술발달에 따른 새로운 기술을 적용한 다양한 교육용 매체들이 개발되고 있다. 특히, 증강현실 콘텐츠는 학습자의 조작활동을 통한 3차원 입체영상을 제공하여 현실감 있는 정보 제공과 학습 경험을 확장시킬 수 있는 교육매체이다. 본 논문에서는 학습자의 직접적인 조작활동 강화 및 객체 간의 관계 탐구 향상을 위하여, 증강현실 콘텐츠를 증강현실 객체의 조합으로 구성하는 증강현실 조합형 마커시스템을 제작하였다. 교실수업에서 초등교과서 5학년 과학교과의 "지구와 달" 단원의 학습 콘텐츠로 사용하였으며, 학습자의 학습활동을 심층적으로 분석하였다. 개발된 증강현실 조합형 마커시스템을 활용한 수업은 학습자의 학습에 대한 자신감과 주의집중에 유의미한 영향을 주고 있으며, 내재적 만족도를 강화하였고, 특히 학습태도를 긍정적으로 변화시켜서 학업성취도의 주요 요소인 지식과 실천에 유의미한 영향을 주고 있다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 가을 학술발표회 논문집
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• pp.771-776
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• 2001

Test results on the deterioration process of concrete under single and combined attacks of chloride penetration have been obtained. After test period of 52 weeks, it is found that the internally penetrated chloride ion contents are less in the single attacks of chloride than the combined attacks of chloride and sulfate. Both the diffusion coefficients and surface chloride concentration derived form the chloride profiles showed a time dependence. Also the performance of fly ash-blended cements was observed to be better than plain cements in retarding chloride attack. However it should be needed that improved chloride diffusion model for the combined deterioration process.

• 한국콘텐츠학회논문지
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• 제5권2호
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• pp.177-185
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• 2005

본 연구는 중년남성 10명을 대상으로 준비운동, 저항운동, 수중운동 그리고 정리운동 순으로 구성된 복합운동프로그램을 1일 60분씩 주 4회의 빈도로 12주간 실시하여 대상자들의 실험전과 후의 변인들을 비교, 분석한 결과 신체구성 성분인 체지방율, 제지방량, 신체질량지수는 각각 유의하게 감소(p<.01)하였으며, 건강관련 체력은 근력, 근지구력, 유연성에서 유의하게 증가(p<.01)하였다. 또한, 혈중지질의 경우 총 콜레스테롤, 저밀도지단백콜레스테롤, 중성지방은 유의하게 감소(p<.01)하였으며, 고밀도지단백콜레스테롤은 유의하게 증가(p<.05)하였다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 1996년도 가을 학술발표회 논문집
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• pp.276-282
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• 1996

This study dealt with the properties for fly ash of combined heat power plant and application for concrete industry. For this purpose, fly ash of ulsan combined heat power plant was analyzed for physical and chemical properties and tested the properties of the super flowing concrete. As results of fly ash, contents of SiO2 and Al2O3 in the fly ash of Ulsan were less than those of thermal power plant(Boryung), but contents of CaO were ten times as much as those of Boryung. In order to satisfy the properties of the Super Flowing Concrete using class C fly ash, mixing conditions were determined the optimum water-binder(w/b), volume ratio of fine aggregates(Sr) and coarse aggregates(Gv).