• Magazine of the Korean Society of Agricultural Engineers
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• v.42 no.3
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• pp.66-75
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• 2000

Effect of reclaimed sewage on the paddy rice culture was examined by field experiment for two consecutive years. The domestic sewage was treated by the constructed wetland and the effluent of the treatment wetland was used for irrigation water. The reclaimed sewage was diluted before irrigation in the first year and it was used without dilution in the second year experiment. Growth components and yields were compared against the control plot where conventional method was applied. And also soil characteristics of the plots before and after reclaimed sewage irrigation were analyzed Generally addition of the reclaimed sewage irrigation didn't affect paddy rice culture adversely and even enhancement was observed. Fertilization was thought to be important factor for rice culture rather than irrigation water quality. Conventional fertilization and reclaimed sewage irrigation which contained high nutrient concentration resulted in better growth and more yield. Unlike widespread concern lodging did not happen even in the case of irrigation with average 90mg/L of T-N and conventional fertilization. Soil characteristics changed after irrigation and significant EC increasing was observed for the reclaimed sewage irrigation plots. From soil analyses salt accumulation could be a more potential problem than nutrients like nitrogen and phosphorus in the use of reclaimed sewage irrigation. Overall reclaimed sewage irrigation was thought to be one of practical alternatives for the ultimate disposal of sewage in rural area.

• Journal of the Korean Association of Geographic Information Studies
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• v.9 no.2
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• pp.11-19
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• 2006

Sewerage is the system that improves the quality of human life and prevents many disasters such as floods. However the investigators in Korea only have been concerned about the sewer system, so the sewage treatment plant stays in the basic level like mapping. For example, only one attribute can be recognized in the linear object. Because of this limitation, it makes difficult to manage the linear attribute regarding to the sewage pipe plan. And it is impossible to control a partial (point type, line type) attribute changes of the linear object. We will therefore present the applicable method for the attribute changes of the linear object like the sewage pipe plans. For this reason, this paper is designed on the basis of Dynamic Segmentation(DS). DS has the advantage of giving the attribute value to the exact place in the linear object. As a result of using DS, the variety environment changes around the sewage pipes are applied to the building sewerage data. This also makes it possible to get a precise estimation for the maximum dirty water amount.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.296-299
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• 2020

요즘 대한민국은 코로나 19로 인하여 외출이 힘든 상황에 놓여있다. 이에 따라 소비자들은 오프라인 매장에서 의류를 구매하기보다는 인터넷 쇼핑으로의 구매를 선호하게 되었으며 온라인 구매로 인해 정확한 스타일 확인 불가 및 확신할 수 없는 사이즈로 큰 불편함을 겪고 있다. 따라서 최근 가장 떠오르는 기술 중 하나인 AR을 실생활에 적용하여, 사용자가 의류 매장에 가지 않고 집에서도 편하게 자신의 스타일링을 실현할 수 있도록 하는 AR 쇼룸을 구현하여 솔루션을 제안하고자 한다. 본 프로젝트에서는 3D로의 표현을 위해 Kinect Xbox 카메라를 사용하여 사용자의 신체정보를 추출한 후 unity와의 연동을 통해 사용자에게 편리함을 제공할 수 있는 AR-fitting 시스템을 설계하였다. 또한, 우리는 선택한 옷을 가상으로 입어 볼 수 있는 쇼룸 형태의 서비스를 제공하며 제스처 인식을 통해 보다 편리한 의류 선택 및 사이즈 조절 등을 가능하게 하였고, 이러한 시스템은 사용자의 의류 구매를 보다 효과적으로 만들어 줄 수 있을 것이다.

• The Transactions of the Korea Information Processing Society
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• v.5 no.1
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• pp.149-160
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• 1998

ReMP(Reliable Multipeer Protocol)는 멀티미디어 그룹 통신을 지원하기 위해 설계된 신뢰성 있는 다자간 전송 프로토콜이다ㅣ. 본 논문에서는 ReMP가 제한된 환경에서도 올바르게 동작함을 증명하였으며, 호스트에서의 처리량 관점에서 데이터 전송에 대한 성능 분석을 시도하였다. 또한 이를 토대로 ReMP는 성능이나 메모리 요구량 관점에 비추어 볼 때, 다른 비교 대상 프로토콜들보다 광범위한 용도의 멀티미디어 그룹 통신에 적용되어질 수 있음을 알 수 있다.

• Journal of Digital Convergence
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• v.17 no.6
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• pp.169-175
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• 2019

The aim of this study is to examine the relative economic benefits between the septic tank and exclusive sewage pipe line in designing the large building at combined sewer districts. With the case study of Lotte World Tower Building, we analyze a cost-benefit between two alternatives. The research results showed 2 years of payback period, about ￦6.17 billion of NPV, and 1.93 of B/C ratio for installing the exclusive sewage pipe line in comparison with septic tank. This results provide useful guidelines for policy establishment of the septic tank closure and for plausibility of installing exclusive sewage pipe line when constructing a large building. In the future, it will be necessary to consider additional cost-benefit analysis including burden charge borne by causers, the burden of management responsibility with a exclusive sewage pipe line, and the economic benefits of reducing odor.

• KSBB Journal
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• v.21 no.4
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• pp.317-323
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• 2006

This study focused on the availability of wastewater reclamation and reusing system as one of the alternatives against the global water shortage in near future, which system is composed of two treatment steps; first, wastewater is injected into upflow $A^2O$ biofilm process(anaerobic/anoxic/oxic) reactor filled with polyethylene fixed-media, and the effluent of 1st steps continuously passed through downflow nano silver sand filter. The pH of the effluent ranged from 7.39 to 8.06(average 7.84), the $COD_{Mn}$ was $8{\sim}18mg/L$(average 12.1 mg/L), and $BOD_5$ was $2.1{\sim}10.0mg/L$(average 4.9 mg/L), that met all the wastewater reclamation and reusing system criteria. Besides, the SS concentrations of the effluent which was $3{\sim}9mg/L$(average 4.95 mg/L) met the criteria(5 mg/L), showing 94.8% of average removal efficiency. The 99.1% of the average removal efficiency of the E-coliform did not met the criteria(Not detected), which indicates the needs for the following chlorine disinfection treatment with the residual chlorine concentration of above 0.2 mg/L. There are no bacteria on the sand surface coated by nano silver. The removal efficiency of T-N and T-P that could be included into the criteria in the future was 50.3% and 27.2% respectively.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2002.10a
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• pp.397-400
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• 2002

Discharge characteristics of pollutant loadings from sewage systems were estimated in the catchment area of a reclaimed area - Saemangeum -. Pollutant loadings were estismated according to the discharge pattern of small treatment facilities. BOD pollutant loadings produced by population were 84,380kg/day, which were composed of nightsoil 35% and sewage 65%.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 1999.10c
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• pp.663-669
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• 1999

The objective of this study are to examine the feasbility of reuse treated sewage effluent ofr agricultural water, and to obtain basic data for estabilishment of rational agricultural water quality standard. From this study, it appears that reuse of treated sewage as a supplemental irrigation water could be feasible and practical alternative for ultimate sewage disposal which often causes water quality problem to the receiving water body. For full scale applicatiion, further study is recommended on the secific guidelines of major water quality components and publc health.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.891-894
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• 2003

이동 객체의 현재 위치를 갱신하고, 이를 탐색하는 기법은 이동 객체의 수가 많아 이동이 자주 발생할 때 많은 시간과 비용이 소요된다. 본 논문은 노드의 계층적인 위치 관리 구조상에서 갱신 시간은 다소 증가 하나 탐색 시간은 감소되어 효율적으로 위치 정보를 관리할 수 있는 기법을 제시한다. 본 논문에서 제시하는 위치 관리 기법은 고정 호스트에 이동 객체의 위치를 기록하는 사용자 프로파일을 호출 대 이동 비율에 따라 복제하여 유지함으로써 위치 갱신과 위치 탐색을 효율적으로 수행하는 노드의 계층적 위치 정보를 이용한 복제본 위치 탐색(RLS : Replication Location Search) 기법이다. 이 기법은 자주 이동하는 객체의 위치 정보를 복제함으로써 위치 탐색시에 기존 기법보다 적은 비용으로 보다 빠른 시간 안에 원하는 이동 객체의 현재 위치를 탐색할 수 있는 새로운 위치 관리 기법에 대한 연구이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11b
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• pp.1079-1082
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• 2002

최근 암호문을 변경할 수 없다는 안전성(CCS)을 제공하는 공개키 암호 알고리즘에 대한 필요성이 제기되었고, 그에 따른 안전성이 증명 가능한 공개키 암호 방식을 개발하려는 연구가 활발히 진행되고있다. 본 논문에서는 [7]에서 제안한 안전성이 증명 가능한 공개키 암호시스템을 이용하여 안전한 E-mail 어플리케이션을 구현하였다. 구현한 E-mail 어플리케이션은 사용자가 자신이 원하는 공개키 알고리즘, 대칭키 알고리즘, 해쉬 알고리즘 등을 선택하여 사용할 수 있고, 누구나 쉽게 사용할 수 있도록 인터페이스를 구성 하였으며 E-mail과 접목하여 활용 가능하다는 장점이 있다.