• Journal of the Korean GEO-environmental Society
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• v.4 no.3
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• pp.41-49
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• 2003

If MSW(Municipal Solid Waste) landfill is used as a foundation ground of construction site, the change of loading condition may cause a large amount of compression in MSW landfill. Therefore, the reinforcement for the loose compression nature of MSW landfill would be very important design factor to geotechnical engineers in considering the end-use of the landfill. In this study, a possible technique for stabilizing MSW landfill with use of codisposal of municipal solid waste and Fly Ash is discussed. In order to estimate the stabilization of compression characteristic of codisposed landfill, large compression test and lysimeter test were performed. According to the test results, as the proportion of Fly Ash increases, the compression might be reduced, but the permeability might be also reduced. Therefore, it is necessary to take into account the both characteristics changes in real application.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.4
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• pp.1683-1691
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• 2013

Concrete surface grinding is frequently used for flatness of concrete surface, concrete pavement rehabilitation, and adhesiveness in pavement construction. The procedure is, however, labor intensive and has a hazardous work condition. Also, the productivity and the quality of concrete surface grinding highly depend on the skills of worker. Thus, the development of remote controlled concrete surface grinding equipment is necessary to prevent the environmental pollution and to protect the workers from hazardous work condition. However, it is difficult to evaluate the grinded surface objectively in a remote controlled system. Also, The machine vision system developed in this study takes the images of grinded surface with the network camera for image processing. Then, by representing the quality test results to the integrated program of the remote control station, the quality control system is constructed. The machine vision algorithm means the image processing algorithm of grinded concrete surface and this paper presents the objective quality control standard of grinded concrete surface through the application of the suggested algorithm.

• Journal of Korean Tunnelling and Underground Space Association
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• v.17 no.6
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• pp.623-635
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• 2015

Double-deck tunnels beneath the groundwater table have relatively large volume and commonly constructed as watertight tunnels. In this case, it requires to secure stability of the tunnels for buoyant force. Generally the contact force between lining and ground is sufficient to resist the buoyant force. However in the long-term the contact force could be reduced because of structural deterioration. In this study the effect of long-term buoyant force acting on the double-deck tunnel is investigated. The results has shown that the buoyant force has increased invert deformation and stress. It is indicated that the contact resilience between lining and ground needs to be kept during tunnel operation.

• Geotechnical Engineering
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• v.12 no.5
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• pp.41-54
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• 1996

In this paper, the consolidation settlement of the landfill foundation during and after the period of disposal is analyzed using the program CONSOL which can include the influence of waste load and the leachate level into the analysis. the stability analysis of the embankment is also performed under the varied strength of foundation soil which results from the increase of effective stress due to consolidation of the clay under the landfill. The predicted settlement from CONSOL is compared with the field measured settlement. The results show that, when the leachate level increases with the increase of waste height, the increase of the effective stress of foundation clay is negligible and the stability of the slope of the landfill may not be secured as the disposal of the waste proceeds. Several complementary repairworks, e. g. the reduction of current slope of the fill, application of drain methods to stop or reduce !he leachate level are recommended. The predicted settlement consists moderately with the field measured settlement.

• Journal of the Korean Geotechnical Society
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• v.27 no.3
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• pp.75-83
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• 2011

Emerging issues related with fully coupled Thermo-Hydro-Mechanical (THM) behavior of unsaturated soil demand the development of a numerical tool in diverse geo-mechanical and geo-environmental areas. This paper presents general governing equations for coupled THM processes in unsaturated porous media. Coupled partial differential equations are derived from three mass balances equations (solid, water, and air), energy balance equation, and force equilibrium equation. With Galerkin formulation and time integration of these governing equations, finite element code is developed to find nonlinear solution of four main variables (displacement-u, gas pressure-$P_g$), liquid pressure-$P_1$), and temperature-T) using Newton's iterative scheme. Three cases of numerical simulations are conducted and discussed: one-dimensional drainage experiments (u-$P_g-P_1$), thermal consolidation (u-$P_1$-T), and effect of pile on surrounding soil due to surface temperature variation (u-$P_1$-T).

• Journal of the Korean Society of Costume
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• v.53 no.6
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• pp.161-173
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• 2003

The purpose of this paper is to classify fashion and trend, and examine how his fashionable philosophy reflects design. What affects his fashion philosophy is Western culture and Paris Revolution. Taking this opportunity, he outgrew the concept of haute couture and established specific fashion philosophy. His fashion philosophy is classified under consideration for women, respect for free emotions, recognition of tradition, and an active intercourse with many people. The characteristics of design through his philosophy are as following: 1. He wanted to release women from clothing restrained the body and make comfortable clothing which everyone can wear. This implies the consideration for women. It is the characteristics of his design to the harmony of functionality, simplicity, decoration and popularity. 2. He respected the free emotions and induced people to wear each parts of clothing which is dismantled freely within the limits coincided with clothing teleology-'wear', It implies autonomy. He also unfolded experimental design: gives the regular space between the clothing and the body and then distorts the body or maximizes modeling. It implies the beauty of space. 3. He elicited the modern design through recognition of tradition. It implies contemporaneousness. 4, As he thought that all of the concepts is based on human, he derived inspiration firm an active intercourse with many people, He established a new style through an active intercourse with artists because if he works alone, he would rise above the popular trend, It comes to the gest artist serieE and implies popularity, The characteristics of design in his fashion philosophy is classified into experimental design and practical design. But the important factor of his fashion philosophy is popularity so he would like to make popular clothing. He designs clothing which fit the public. It results from his firm fashion philosophy that his clothing is practical and decorative and he establishes his works meeting needs of modern. It is the reason that his clothing has perpetuity.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.247-247
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• 2011

도시유역에서의 일반적인 우수관거 설계 및 기존의 연구들은 수리학적 조건을 만족시키는 범위 내에서 최소의 비용을 위한 관거 설계에 초점을 맞추어왔다. 그러나 최적의 우수관거 설계는 우수관거의 근본적 목적인 내수배제를 최대화 하고자 하는 것이며, 이것은 관망 구성에 따른 시스템 내 유입 수문곡선들 간의 중첩효과를 제어함으로써 가능하다. 본 연구에서는 관내 흐름의 변화를 관망의구성에 따라서 제어될 수 있는 목적함수로서 다루고 있는 이정호(2010)의 우수관망 최적설계 모형에 대하여 각기 다른 유역 특성을 나타내는 실제 도시유역에서의 적용성을 검토하였다. 본 연구에서 이용한 최적 우수관망 노선 결정 모형은 이정호(2010)가 개발한 모형으로 도시유역에서의 우수관망의 노선 결정을 유출구 첨두유출량 최소화를 목적으로 최적화기법을 이용한 모형이다. 이정호(2010)는 개발된 모형을 통하여 관망 노선을 결정한 결과 설계빈도를 초과하는 강우에 대해서 내수침수 발생이 저감되는 효과를 가져올 수 있음을 분석하였다. 본 연구에서는 이러한 이정호(2010)의 모형에 대한 적용성을 검증하기 위하여 각기 다른 유역 특성을 갖는 실제 도시유역들에 대하여 해당 모형을 적용하였다. 이때 유역의 특성은 지표유출 및 첨두유출량에 지배적인 영향을 미치는 유역의 지표 경사에 대하여 고려되었다. 적용된 도시유역은 총 3개 배수분구로서 평균 지표 경사는 0.008, 0.006, 0.002로 각기 높은 경사, 보통 경사 및 완만한 경사 지대를 염두에 둔 유역 선정에 해당한다. 이에 따라 각 유역에 대하여 우수관망 노선을 최적화한 결과 설계빈도의 강우지속기간 30분 강우에 대하여 현재의 관망 대비 최적화된 관망에서의 첨두유출량 저감 비율은 지표경사 0.008인 유역에서는 약 7%, 지표경사 0.006인 유역에서는 약 17%, 지표경사 약 0.002인 유역에서는 약 8%로 나타났다. 따라서 본 연구결과 유역의 경사 특성에 따른 최적 우수관망을 통한 첨두유출량의 저감 비율간에는 상관관계를 정의할 수 없으며, 단지 우수관망에서의 노선 변경이 가능한 맨홀 지점이 어떤 중요한 지점에 얼마나 위치하느냐에 따라 달라지게 되는 것으로 분석되었다.

• Journal of Korea Water Resources Association
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• v.41 no.9
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• pp.885-894
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• 2008

The deposition of solids in combined sewer systems results in a loss of flow capacity that may restrict flow and cause a local flooding and enhanced solids deposition. In order to solve these problems and proper pipe management, estimations of solid loads on land surface in a drainage basin and solid deposition in sewer system due to rainfall are needed but these tasks are very difficult and very expensive. In this study, procedures for estimating solid loads on surface in a drainage basin were applied and analyzed in Gunja drainage basin in Korea. Also, this paper presents the development and application of estimation equation for solid deposition in sewer system due to rainfall based on the solid deposition estimated using MOUSE model. As results, the comparison between estimated and measured solid deposition is difficult due to the absent of measured data, but the estimated values using developed equations show applicability compared with the results of MOUSE model and the application of the other basin. The developed estimation equations can be used usefully for the management of combined sewer system.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.231-231
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• 2011

우리나라 수자원이용량의 47%를 차지하고 있는 농업용수는 공사관리지역(64%)와 지자체관리 지역(36%)으로 이원화 되어 있고, 공사관리지역은 2000년 이전 103개 농지개량조합이 개별적으로 관리하다가, 2000년 이후 농업용수의 효율적 관리를 위하여 2000년에 3개기관(농지개량조합, 농지 개량조합연합회, 농어촌진흥공사)이 통합하여 현재 한국농어촌공사가 되었다. 2000년 이전 103개 조합에서 저수지, 양배수장 등 수리시설물과 용배수로 등 평야부 시설물에 대한 각종 정보가 통합적으로 관리가 되지 못하였고, 매년 발간되는 농업생산기반정비사업 통계연보를 통해서 체계적인 관리가 되어왔다. 2000년 이후 통합 공사가 출범하면서 전국단위의 종합적이고 체계적인 정보관리가 가능해졌으나, 농업용수 정보(자료)가 개별 조합별로 산재되어 있고 전산화 되어 있지 못하였으며, 시설물의 설치년도가 오래된 경우 자료자체가 존재하지 않은 경우가 많이 있고, 소규모 시설의 경우 정보(자료)관리의 필요성에 대한 효용성에 대한 인식이 낮으므로 하여 농업용수관리 정보화에 많은 어려움이 있었다. 또한 기초적인 정보(자료)관리 구축이 되지 못한 상황에서 개별 시설물 또는 수계별로 이 치수관리를 위한 의사결정 지원시스템 구축에도 많은 어려움이 발생하였다. 이는 공사 내부 뿐만 아니라 외부의 우려와 비판이기도 하였다. 이러한 어려운 여건에도 불구하고, 우선 지난 10년 동안 농업용수관리의 기초적인 정보(자료) 관리 구축을 실시하여 수원공과 평야부 시설에 대한 정보구축을 실시하였고, 각 사업별로 RIMS, RAWRIS, TIMS, 지하수넷, UIRRI, 4대강상황실 등의 정보화 시스템을 구축하였다. Post 4대강, 유역통합관리 등 수자원환경의 내외적인 여건변화에 맞춰, 2010년 부터 개별 시스템에 대한 통합 농업용수관리 정보시스템 구축을 위한 마스터플랜을 수립하고 있고, 금번 마스터 플랜수립결과를 바탕으로 실질적인 시스템 구축을 완료하게 되면 명실상부한 농업용수분야의 최상위 시스템으로 자리매김 될 것이다.

• The Korean Journal of Pesticide Science
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• v.9 no.3
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• pp.185-190
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• 2005

Solid phase synthesis of 16, which is a derivative of the first systemic fungicide, carboxin 1 was described. Reaction of 1,3-oxathiolane derivative with solid resin of 4-hydroxy-3-nitrobenzophenone 6 gave 9 in 82% yield. Oxidation of sulfur in the solid 1,3-oxathiolane 9 by MCPBA followed by a ring expansion reaction under the acid catalyst afforded the corresponding dihydro-1,4-oxathiin derivative 12. Treatment of the solid 1,3-oxathiolane 9 with p-methoxyaniline resulted in 1,3-oxathiolane 14, 1,3-oxathiolane sulfoxide 15, dihydro-1,4-oxathiin 16, and acetoacetanilide derivative 17 in 41%, 35%, 14%, 10% yields, respectively.