• Journal of the Korean Geosynthetics Society
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• v.7 no.1
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• pp.23-29
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• 2008

Recently, dewatering process method of high water content materials that utilize geotextile has many applications in variety fields. It is method of dewatering to solid step through self-weight consolidation process after pour sludge using filtering efficiency and dewatering efficiency. Analyzed application of domestic manufactured geotextile tube that can examine physical characteristics of geotextile tube and filling soil and achieve filtering efficiency and dewatering efficiency. Based on the various laboratory and field test results mixing proportions of water and soil is about 6:4 at least. Polypropylene geotextile is more effective for drainage and dewatering function of geotextile tube application.

• Korean Journal of Soil Science and Fertilizer
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• v.43 no.6
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• pp.804-811
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• 2010

The lower portion of sloping paddy fields normally contains excessive moisture and the higher water table caused by the inflow of ground water from the upper part of the field resulting in non-uniform water content distribution. Four drainage methods namely Open Ditch, Vinyl Barrier, Pipe Drainage and Tube Bundle for multiple land use were installed within 1-m position from the lower edge of the upper embankment of sloping alluvial paddy fields. Knowledge of the spatial variability of soil water properties is of primary importance for management of agricultural lands. This study was conducted to evaluate the effect of drainage in the soil on spatial variability of soil water content using the geostatistical analysis. The soil water content was collected by a TDR (Time Domain Reflectometry) sensor after the installation of subsurface drainage on regular square grid of 80 m at 20 m paddy field located at Oesan-ri, Buk-myeon, Changwon-si in alluvial slopping paddy fields ($35^{\circ}22^{\prime}$ N, $128^{\circ}35^{\prime}$). In order to obtain the most accurate field information, the sampling grid was divided 3 m by 3 m unit mesh by four drainage types. The results showed that spatial variance of soil water content by subsurface drainage was reduced, though yield of soybean showed the same trends. Value of "sill" of soil water content with semivariogram was 9.7 in Pipe Drainage, 86.2 in Open Ditch, and 66.8 in Vinyl Barrier and 15.7 in Tube Bundle.

• Geotechnical Engineering
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• v.12 no.6
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• pp.153-162
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• 1996

The undrained creep tests with isotropically and anisotropically overconsolidated clays were performed to investigate the effects of anisotropic consolidation on the undrained creep rupture behavior. Results of tests showed that the undrained creep rupture behaviors were iuluenced significantly by stress history including overconsolidation ratio and consolidation pressure ratio$(\sigma_{3c}/\sigma_{le})$. That is. the creep strength of clay increases with the increase of both overconsolidation ratio and consolidation pressure ratio. It, therefore, is dangerous to decide the possibility of creep rupture of clay by the isotropically consolidated creep rupture test in the case of the coefficient of earth pressure lower than 1.0. And the creep strength of clay could be obtained by the equation of the upper yield strength suggested by Finn and Shead(1973) irrespective of both overconsolidation ratio and consolidation pressure ratio.

• 한국관개배수회지
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• no.37
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• pp.14-15
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• 2007

"국제농업정보교류 포럼"은 2006년 10월 5일, 농림부, 농촌진흥청, 한국농촌공사, 대학, 관련 연구소등의 각 분야 전문가 20명을 운영위원으로 구성하여 개인간, 조직간 네트워킹을 통하여 국제농업에 대한 공동협력을 추구하고자 출발하였다. 이 포럼이 주관이 되어 2006년 11월 7일 "ICID 콸라룸푸르회의 및 제3차 INWEPF 운영위원회의" 참가 결과보고회를 개최하였으며, 2007년 2월 7일-9일 일정으로 "한.일 실무급 농촌개발 전문가 워크숍"을 개최하였다. 또한 오는 7월 2일부터 4일까지 우리나라에서 "INWEPF & ICID WG-SDTA공동 워크숍"을 개최할 예정이다. 현재 67명의 회원들이 가입하여 참여하고 있으며, 한국농촌공사 농어촌연구원 국제학술교류팀에서 운영관리하고 있다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11a
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• pp.457-460
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• 2003

RTS(Real Time Streaming Protocol) 프로토콜은 어플리케이션 레벨에서 실시간 데이터 전송의 세션과 제어를 표현한다. 하지만, RTSP는 오든 스트리밍 솔루션에 대한 내용을 포함하고 있어 그 내용이 포괄적이고. 회사별 자신의 응용과 환경에 맞게 RTSP 표준을 구현하고 있어 상호호환이 어렵다. 본 논문에서는 주문형 미디어 시스템에 필요한 기본 기능을 RTSP 표준을 이용하여 어떻게 구현해야 하는지에 대한 방법을 제시함으로써, RTSP 지원 업체간의 호환성을 유도한다.

• Proceedings of the Korean Society of Crop Science Conference
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• 1999.05a
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• pp.140-141
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• 1999

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.311-312
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• 2001

앞으로의 양식 방법은 자연 환경을 훼손시키지 않는 환경 친화적 양식을 모색해야만 하며 오배수는 자연 수계로 배출하기 전 처리하여 생태계의 균형을 깨뜨리지 않는 양식 방법으로 생산성을 올려야만 한다. 이에 소량의 물 사용과 적절한 수처리 기술을 이용한 순환여과식 양식 방법은 전 세계적으로 관심을 받고 있으며, 환경 단체나 정부 및 지역 단체의 지지를 얻고 있다(Van Rijn, 1996). (중략)

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.387-389
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• 2018

As science advances, the kinds of energy that humanity can use are increasing. Since most of these are energy that pollute the environment, environmental pollution will become increasingly serious if we continue to use this energy. Therefore, in this paper, we want to study how to develop using less polluting hydroelectric power. As a result, we built a hydroelectric generator that was developed using wastewater that was installed in a drainage port. Through this study, it is successful to use this generator in each home or underdeveloped country.

• KIEAE Journal
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• v.9 no.2
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• pp.99-106
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• 2009

The noise in apartment buildings are major factor that determine the quality of indoor noise environment. Particularly, the noise from children's running footsteps and plumbing noise have caused the residents who live in decrepit apartment houses to uncomfortable environment. And as time go by, sound performance are getting worse according to the aging of the facilities. So this study deals with the plans to improve the sound performance of decrepit apartment house. To compare the noise reduction, we measured the heavy-weight impact sound level and plumbing noise level before and after changes the measurement conditions. As the results of measurements, the heavy-weight impact sound level were decreased when stiffness reinforcement were installed on slab. Especially the sound level were decreased 2.1-7.6dB in 50-80Hz of low frequency range. Instead of PVC pipe system, cast iron pipe and triple elbow drain pipe systems were installed. Noise level were decreased 15dB(A) in 250Hz. Noise level of pipe system's on the slab is less than under slab one. On the contrary water saving stool showed increasing the noise level.

• Journal of the Korean Geosynthetics Society
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• v.4 no.1
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• pp.7-15
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• 2005

In recent years, the geotextile tubes filled with dredged material have been used in dike and breakwater construction for a number of projects around the world, and their use in this field is growing very fast. One of the most attractive advantages of geotextile tube technology is can be use the in-situ filling materials by hydraulic pumping, it can be also established lower costs and fast construction than other technology. Geotextiles form one of the two largest groups of geosynthetics and it is commonly made by two major types of polymer material(Polypropylene, Polyester). The objective of this paper is to examine several issues associated with drainage function and feasibility of geotextile tube structure such as filtering efficiency, dewatering efficiency, and filling process with polymer materials. Based on the laboratory filtering test and in-situ tests, polypropylene goetextile is more effective for drainage function of geotextile tube technology.