• Advances in concrete construction
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• 제1권1호
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• pp.65-84
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• 2013

Electrical resistivity is a property associated with both the physical and chemical characteristics of concrete. It allows the evaluation of the greater or lesser difficulty with which aggressive substances penetrate the concrete's core before the dissolution of the passive film process and the consequent reinforcement's corrosion begin. This work addresses the capillary absorption of self-compacting concrete (SCC) with various types and contents of additions, correlating it with its electrical resistivity. To that effect, binary and ternary mixes of SCC were produced using fly ashes (FA) and limestone filler (LF). A total of 11 self-compactable mixes were produced: one with cement (C) only; three with C + FA in 30%, 60% and 70% substitution ratios; three with C + LF in 30%, 60% and 70% substitution ratios; four with C + FA + LF in combinations of 10-20%, 20-10%, 20-40% and 40-20% substitution ratios, respectively; and four reference mixes according to the LNEC E 464 specification, which refers to the NP EN 206-1 norm. The evaluation of the capillarity of the mixes produced was made through the determination of the water absorption by capillarity coefficient according to the LNEC E 393 specification. The electrical resistivity was evaluated using the European norm proposal presented by the EU-Project CHLORTEST (EU funded research Project under 5FP GROWTH programme) and based on the RILEM TC-154 EMC technical recommendation. The results indicate that SCC's capillarity is strongly conditioned by the type and quantity of the additions used. It was found that FA addition significantly improves some of the properties studied especially at older ages.

• 융합보안논문지
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• 제22권4호
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• pp.85-97
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• 2022

빅데이터 기술이 발전하면서 데이터가 전 산업의 혁신 성장을 가속하는 초연결 지능화 사회로 빠르게 진입하고 있다. 고품질의 다양한 데이터를 보유하고 활용하는 융복합 산업이 새로운 성장 동력으로 자리매김하고 있으며, 다양한 전통 산업군에 빅데이터가 융합되어 데이터 기반의 혁신을 통해 디지털 전환이 이루어지고 있다. 특히 의료 분야에서는 전자의무기록 데이터와 같은 정형 데이터와 CT, MRI 등의 비정형 의료 데이터를 함께 활용함으로써, 질병 예측 및 진단의 정확도를 높이고 있다. 현재 의료 산업에서 비정형 데이터의 중요성과 규모는 나날이 증가하고 있지만, 종래의 데이터 보안 기술과 정책은 정형 데이터 중심이며, 비정형 데이터의 보안성과 활용성에 대한 고려는 미비하다. 향후 빅데이터를 활용한 진료가 활성화되려면 데이터의 다양성과 보안성이 데이터 구축, 유통, 활용 단계에서 내재화되고 유기적으로 연계되어야 한다. 본 논문에서는 국내외 데이터 보안 제도와 기술 현황을 분석한다. 이후 의료 분야에서 비정형 데이터가 활발히 사용될 수 있도록 비식별조치 가이드라인에 비정형 데이터 중심의 비식별 기술과 산업에서의 기술 적용 사례를 추가하고, 비정형 데이터에 대한 개인정보 판단 기준을 수립할 것을 제안한다. 더 나아가 개인정보를 침해하지 않고, 비정형 데이터에 활용할 수 있는 객체 특징 기반의 식별 ID를 제안한다.

• Smart Structures and Systems
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• 제22권5호
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• pp.575-586
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• 2018

Computational Building Information Modeling (BIM) is an intelligent 3D model-based process that provides architecture, engineering, and construction professionals the insight to plan, design, construct, and manage buildings and infrastructure more efficiently. This paper aims at using BIM in Hospitals configurations protection. Infrastructure projects are classified as huge structural projects taking advantage of many resources such as finance, materials, human labor, facilities and time. Immense expenses in infrastructure programs should be allocated to estimating the expected results of these arrangements in domestic economy. Hence, the significance of feasibility studies is inevitable in project construction, in this way the necessity in promoting the strategies and using global contemporary technologies in the process of construction maintenance cannot be neglected. This paper aims at using the building information modeling in covering Imam Khomeini Hospital's equipment. First, the relationship between hospital constructions maintenance and repairing, using the building information modeling, is demonstrated. Then, using library studies, the effective factors of constructions' repairing and maintenance were collected. Finally, the possibilities of adding these factors in Revit software, as one of the most applicable software within BIM is investigated and have been identified in some items, where either this software can enter or the software for supporting the repairing and maintenance phase lacks them. The results clearly indicated that the required graphical factors in construction information modeling can be identified and applied successfully.

• 청정기술
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• 제7권1호
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• pp.81-88
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• 2001

발전소의 탈황에 사용되는 습식탈황장치에는 반응제로 석회석이 사용된다. 본 연구에서는 주로 사용되는 325mesh입도의 석회석과 함께, 저렴한 200mesh석회석의 탈황공정 특성에 관하여 조사하였다. 석회석의 용해도에 대해 입도별로 실험한 결과 석회석의 입도가 클수록 용해속도가 떨어지는 것을 알 수 있었다. 그러나 습식탈황 공정에서의 탈황율은 석회석 입도와는 상관없이 L/G비(Liquid/Gas ratio, $L/m^3$) 및 현탁액의 pH에 의해서 증감되었다. 탈황공정에서의 부산물로 발생하는 석고의 경우에는 입도가 작아짐에 따라, 그리고 pH가 낮아짐에 따라 순도는 향상되는 것으로 나타났다. 한편 두 가지 입도의 석회석을 일정분율씩 혼합하여 실험한 결과 그 혼합비에 비례하여 탈황율, 석고 순도, 석회석 이용율 등의 공정특성이 나타났다.

• 복식
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• 제35권
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• pp.343-366
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• 1997

Most of the recently-exhumed excavat-ed costume is the garment for the dead which is one of the costume of funeral rite Investigating the birth and death years of the dead reveals that the excavated cos-tume was mostly used in the 16th and 17th centuries, . The study on the change of clothes in-cludes two aspects; one is manifestication of the structure of clothes and the other is elucidation of the constructure of clothes through examining constructure compo-nents and constructure compo-nents and construction method. This study investigates the costume of the midddle years of the Chosun dynasty in these aspects by examining the excavated Costume of 16th and 17th centries and Ryesu. This study also aims to assist to comprehend the constructure of costume by comparing actual excavated clothes with chronological standards through in-specting diverse clothes in a specified pe-riod. The construction of the clothes of the middle years of the Chosun dynasty is different depending on the purpose of theclothes and the principle of sewing is set up on the bases of mentality and body That is the Costume stands for the individual social and men-tal world of the people at that time since the external construction of the clothes represents their social rank and the inter-nal construction of sewing symbolizes their mentality. The characteristics features of the clothes of the middle years of the Chosun dy-nasty coexistence of diverse sorts and patterns indicates a change in clothes. This suggests that the clothes of a partic-ular class last and change in role corre-sponding to formation lasting and extinc-tion of the class. Thus diversityof the sort of general costume advancement of pattern and the change of clothes de-pending on the change of the class signify that the middle years of the Chosun- dy nasty is a period in which the general costume is actively developed and a turn-ing point for transforming the traditional clothes into new ones, . In other words the middle years of the Chosun dynasty is characterized as an era during which a castume native to Korea is formed with respect to the structure and constructure of clothes.

• 대한환경공학회지
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• 제34권9호
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• pp.583-589
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• 2012

하수슬러지의 처분 방안으로서 하수슬러지를 생활폐기물과 혼합소각시의 가능성을 타진하기 위해 전체폐기물 중 하수슬러지를 20%까지 혼합하여 실험한 결과, 열부하 및 대기오염물질(질소산화물, 황산화물)부하에 영향을 크게 주지 않는 것으로 나타났다. 생하수슬러지(함수율 78.8%) 및 건조하수슬러지(함수율 60%)를 혼합소각한 결과, 건조하수슬러지를 혼합한 경우에는 열부하변동이 거의 없었으나 생하수슬러지를 혼합소각한 경우는 열부하가 다소 낮아지는 것으로 나타나 전처리를 한슬러지 혼합소각이 평상시와 같은 운전조건으로 소각로 연소를 이룰 수 있을 것으로 판단되나 고발열 생활폐기물 발열에 의한 소각로 파손을 방지하기 위해서는 에너지 비용 및 슬러지 경화현상에 의한 국부소각 방지 등을 고려하여 생하수슬러지에 수분을 공급하여 소각하는 방안도 고려해 볼만 하다고 판단된다.

• 복식
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• 제32권
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• pp.293-312
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• 1997

Deconstructionism is a philosophical stream in the latter half of 20'th century which goes against western metaphysics and tries to deconstruct the dualism e.g. eastern/west-ern man/woman. Its main concepts are 'indi-vidual' 'other' 'difference' 'restoration of the repressed' 'decentralization' 'Today it shows strong influences in literature art, and other social fields. This study investigated inner meanings and exterior forms represented in clothing on the base of Jacques Derrida's theory in order to re-search modes of deconstruction in is. And it compared clothing with architecture among other genres of art in order to discover similarities between through and modes of art in a certain period. For illuminating concept of deconstruction I referred to the literatures of preceding studies and for deconstruction's characteristics in both clothing and architec-ture I referred work's collection book $\ulcorner$collec-tions$\lrcorner$ and other related books dealing from 1960's to this point. As a rsult there are four modes of decons-truction in both clothing and architecture as follows; 1) Differenance which is a concept of the dif-ference in time and space as being trace. 2) In termeaning of meanings which is not present in reality but re-interpreted a new in the future. 3) Interxtuality in which a texte is not alone but with others 4) Dis.De phenomenon in which distortion and fragmentation forms occur as the result of the denial of perfection and reson. There are characteristics of modes of de-construction in clothing as follows; 1) Differance; R.Gigli, P. Rabanne. G.Bersace, V.Westwood are representatives of the cloth-ing which is combined with the past the pres-ent and the future or is re-viewed as the clothing of the past in the present point of view. J. Watanabe R. Dawakubo I miyake are representatives of the clothing which is out-date but re-viewed in the sense of recollec-tion and re-usage. 2) Intermeaning of meanings: R. kawakubo I, Miyake Y,Yamamoto are representatives of the clothing which is incomplete but re-interpreted in the future and appears to be new-fashioned according to ways of bnding wearing throwing on and tying J.C. Castel-bajac K.Hamnett S.Sprouse are representa-tives of the clothing which is made up of ab -stract forms scribbling or symbolic letters which appears to be different according to view-point of observers. 3) Intertextuality ;J.P.Gaultier K.Hamnett, Comme des Gar ons are representatives of intertextuality of gender which avoids the 여-ality of man/woman J.P Gaultier G,Versace J. galliano are representatives of the intertex-tuality of time place and occasion which mixes temporality extensity and purposiveness. J.P Gaultier G,Versace are representatives of the intertextuality of coordination which combines items different in image purpose and use. P.Rabanne A,Courr ges R,Gernreic I,Miyake are representatives of the intertextuality of mat-ter which uses heterogeneous matter different from cloth. 4) Dis.De-phenomenon: R, Kawakubo I.Mi-yake J.P.Gaultier are representatives of the de-composition which discloses distortion and exag-geration of form through destructing the estab-lished way of construction J.Galliano R.Kawa-kubo Devota Y Lomba arte representatives of the decentring which restores the repressed and the alienated on the one hane and shows front-centrality on the other. Comme des Gar ones is representative of the discontinuity because of which right and left up and down are not in har-mony with one another. J,Galliano J.P,Gaultier T,Mugler are representatives of the disruption by way of which one makes one's body exposed through intentional slashes or holes. As a consequence deconstructionism enabled us to investigate similarities between through of deconstruction and modes of art interms of diffrance Intermeaning of meanings intertextuality and Dis De-phenomenon. And we found that deconstruction was a phase of development in that it as a all-comprising and multiple concept tries to pursue the new through deconstruction.

• 대한환경공학회지
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• 제27권3호
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• pp.323-329
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• 2005

본 논문은 호기-혐기 조건이 연속적으로 반복 운영되는 자연정화시스템의 질소제거에 관한여 연구하였다. 조류 광합성 활동을 극대화한 산화지(WSP: Waste Stabilization Pond)에서 호기조건을, 부레옥잠 잎과 줄기에 의해 태양광이 차단되어 산화지로부터 유입된 조류의 내호흡과 뿌리에 부착된 미생물 호흡에 의해 혐기조건이 형성되는 WHP(Water Hyacinth Pond)를 조합하여 운전하였다. Pilot plant는 2개 계열로 구성하여 운전하였다. 첫번째는 WHPs와 WSPs로 조합하였고, 두번째는 WSP와 질산화와 탈질화에 대한 식물의 효과를 평가하기 위해 대조반응조로 태양광을 차단한 반응조(DPs: Dark Ponds)를 조합하였다. 연구결과에 따르면 질소에 대한 전체적인 제거능력은 WSP-WHP에서 발휘되었으며 약 86%가 감소되었고 대조반응조 WSP-DP에서는 36%가 감소되었다. 대부분 질소는 WSP에서 질산화 된 후 WHP에서 탈질에 의해 제거되었다. 탈질이 원활히 수행될려면 외부탄소원이 필요한데 수생식물조 하부 수층에서 조류의 부패로 탄소원이 공급되었다. 그리고 WSP-WHP 시스템은 인 제거에도 매우 효과적이었다. WSP-WHP에서 인 제거율은 81%인 반면에 WSP-DPs에서는 단지 16%에 불과했다. 이들 두 시스템간의 인 제거율의 차이는 아마도 식물증식과 식물 뿌리에서 생산된 Extra-cellular 물질에 기인한다고 여겨지며 이러한 부분에 대해서는 향후 심도 있는 연구가 진행되어야 할 것이다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2007년도 추계 학술논문 발표대회
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• pp.125-128
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• 2007

This study investigates the fundamental properties of the color concrete corresponding to the various types and contents of the coloring agent. For the properties of the fresh, the flow is gradually decreased corresponding to increasing of the coloring agent, and it is approached to the target flow on $3{\sim}6%$ of the adding amounts. The air content is increased in accordance with the increase of the coloring agent. For the properties of the hardened concrete, the compressive strength is increased about 9 and 12% in the case that $3{\sim}6%$ of red and yellow coloring agents is mixed. And they are decreased when white and black coloring agents. The chromaticity of red $(a^*)$ and yellow $(b^*)$ is appropriate at 6% of the adding amounts, and luminosity of the white and black is also favorable because of economy at 6%, so the formative article is manufactured successfully to aim in the result of this study.

• 한국추진공학회지
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• 제14권2호
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• pp.63-70
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• 2010

본 연구에서는 액체로켓엔진 산화제로 과산화수소를 사용하기 위한 공급 설비 구축 및 세척 방법을 제시하고자 한다. 과산화수소를 추진제로 사용하기 위해서는 90% 이상의 고농도 과산화수소가 필요하며, 고농도 과산화수소의 공급 설비는 약간의 오염에도 민감하게 반응하는 과산화수소의 특성상 오염을 최소화해야 한다. 과산화수소 공급 설비의 오염을 최소화하기 위하여 공급 설비를 세척하고 세척된 공급 설비에 보호막을 입히는 표면안정화 절차를 확립하였다. 또한, 구축된 공급 설비는 누설 시험과 연소 시험 및 저장성 테스트를 통하여 안정성을 검증하였다.