• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 추계학술발표대회 및 정기총회
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• pp.1075-1078
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• 2005

개방형 카드 플랫폼의 개발로 전통적인 카드 플랫폼 모델의 문제점을 해결할 수 있었으나 기존 카드 관리시스템으로 개방형 카드 플랫폼을 관리 할 수 없었고 그 대안 시스템으로 SCMS가 개발되었다. SCMS가 개방형 카드 플랫폼에 있어 통합 관리를 수행하지만 주요 기능인 카드 후발급에 대한 효과적인 인터페이스를 가지고 있지 못하다. 본 논문에서는 스마트카드 관리시스템을 이용하여 효과적인 카드 후발급을 위한 카드 후발급 인터페이스를 설계하였다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2000년도 창립총회 및 춘계학술발표회
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• pp.112-115
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• 2000

Surface complex models(SCMs)은 최근 흡착모델링에 대한 관심사가 부각되면서 수질(표면수, 지하수)오염에 대한 영향을 예측하고 흡착결과를 파악하는데 많은 주목을 받고 있다. SCMs의 흡착모델의 하나인 diffuse double layer model(DDLM)은 특정조건에서 Gouy-Chapman 이론을 바탕으로 설명하고 있지만, 실제와는 상당한 차이를 보인다. 따라서 본 논문은 기존의 자료를 바탕으로 TiO$_2$/용매(수용액/ 물-에탄올(1:1))간의 거리를 추정해 감에 따라, 각 실험적 변수에 따른 electrical double layer(EDL)의 흡착형태의 변화를 알아보았다. 또한, cosolvent가 존재할때, 흡착모델 형태의 변화와 흡착결과에 대한 영향에 대해 알아보았다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2016년도 춘계 학술논문 발표대회
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• pp.126-127
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• 2016

In this research, the optimum combination of fly ash (FA) and blast furnace slag (BS) was deduced by analyzing the performance of high volume supplementary cementitious materials (SCMs) cement mortar depending on various combinations of cement, FA, and BS. As a result, increased workability was shown with increased the portion of FA, while air content, setting time, and compressive strength were decreased.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.169-170
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• 2018

The purpose of the research is suggesting the temperature compensation strength for Unicode of constructure standard from Ministry of land, infrastructure and transport. As a result, for the concrete mixture with 100 % OPC, 6, and 3 MPa of compensating strength values were necessary when the temperature were from 4 to 9℃, and from 9 to 17℃, respectively. Additionally, when the temperature was higher than 17℃, compensating strength value was not necessary. In the case of 20 % of blast furnace slag replaced concrete mixture, 9, 6, and 3 MPa of compensating strength values were necessary when the temperature were from 4 to 6℃, from 6 to 12℃, and higher than 17℃, respectively.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2018년도 춘계 학술논문 발표대회
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• pp.187-188
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• 2018

For the concrete construction, finishing process is inevitable for crack control and improving permeability. The finishing process is closely related with setting time, but currently, the timing of the finishing process is not managed with scientifically but feeling of the workers. In this research, therefore, by comparing with the setting time measured with penetrating method, the feasibility of durometer for measuring setting time was analyzed. As a result, there was a high relationship between setting time measured with penetration method and durometer. Therefore, it is expected that using durometer can be a good solution for assessing setting time for finishing process.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2011년도 춘계학술대회
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• pp.405-407
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• 2011

해양플랜트는 일반적으로 Offshore라고 일컫는 심해 자원을 생산하기 위한 산업 분야를 비롯하여, 해상 풍력 및 조류와 파랑을 이용한 에너지 자원 개발과 관련된 발전 설비 등 해상에 설치되는 모든 사회 기반 시설을 포함한다. 이러한 해양플랜트는 점차 고도화된 기술을 사용하여 미개척 해양 지대로 진출하게 되는데, 육상과 고립되어 해양 환경에 노출되어 있는 만큼 안정적인 시스템을 요구한다. 이는 곧 해양플랜트 설비 자체와 운영 인력들의 안전과도 직결되기 때문이다. 따라서 심해 및 정밀 위치 유지를 위한 DP(Dynamic Positioning) 시스템은 해양플랜트에 반드시 탑재되어야 하며, 운영 환경에 따라 차별화된 DP 시스템이 탑재되어야 한다. 또한 해양플랜트 핵심장비는 국가적인 차원에서 개발이 추진되어야 하며, DP 운영 인력도 체계적으로 양성할 수 있는 메커니즘을 구축해야한다.

• 대한전기학회논문지
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• 제43권7호
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• pp.1067-1074
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• 1994

This paper deals with the combined levitation and guidance EDS(Electrodynamic Suspension) Maglev system. Levitation and guidance forces generated in figured-of-eight coil are examined. End effect of Superconducting magnets is considered in that the air gap flux has been calculated using the finite number of magnets. Induced emfs and currents of ground coils are given as results. Eletromagnetic forces vary according to the built-in position of magnets. Levitation forces of the first magnet pair are the smellest and those of the second one are the largest. This result shows that the end effect of SCMs should be considered in a concentrated magnet system.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 추계 학술논문 발표대회
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• pp.133-134
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• 2014

As a previous research, improved durability of concrete by filling capillary pores with waste cooking oil was suggested as a method of controlling carbonation of the concrete replaced high volume of SCMs. on the other hand, the emulsified refined waste cooking oil for better mixing performance had a drawback of reducing air content related with decreasing freeze-thawing resistance. As a solution of this problem, surface applying method was suggested instead of adding in mixing process, and in this research, the performance regarding concrete durability are evaluated comparing emulsified refined cooking oil with water-repelling agent.

• Computers and Concrete
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• 제21권6호
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• pp.649-659
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• 2018

Adaptive neuro-fuzzy inference systems (ANFIS) can be efficient in modelling non-linear, complex and ambiguous behavior of cement-based materials undergoing combined damage factors of different forms (physical and chemical). The current work investigates the use of ANFIS to model the behavior (time of failure (TF)) of a wide range of concrete mixtures made with different types of cement (ordinary and portland limestone cement (PLC)) without or with supplementary cementitious materials (SCMs: fly ash and nanosilica) under various exposure regimes with the most widely used chloride-based de-icing salts (individual and combined). The results show that predictions of the ANFIS model were rational and accurate, with marginal errors not exceeding 3%. In addition, sensitivity analyses of physical penetrability (magnitude of intruding chloride) of concrete, amount of aluminate and interground limestone in cement and content of portlandite in the binder showed that the predictive trends of the model had good agreement with experimental results. Thus, this model may be reliably used to project the deterioration of customized concrete mixtures exposed to such aggressive conditions.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 봄 학술논문 발표대회
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• pp.19-20
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• 2022

Portland Limestone Cement (PLC) is a blended cement using limestone powder as SCMs (Supplementary Cementitious Materials), and is currently regarded as an essential means for achieving carbon neutral in the cement industry. This study was performed to investigate the fresh and hardened properties of cement mortar according to the fineness and replacement ratio of limestone powder. As a result, the compressive strength of mortar used high blaine limestone powder were equivalent level of that of OPC.