• Current Photovoltaic Research
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• 제7권4호
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• pp.121-124
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• 2019

In this research, the concept of a salt farm parallel solar power system, which produce salt and electricity at the same site, is proposed for the first time in the world. The concept is that large waterproof plates made by interconnected solar modules are installed at the bottom of the salt farm. The pilot system was successfully installed at a sea shore, and verified its feasibility as a solar power plant. For deeper understanding, simulations for power prediction of the system were carried out and compared with the field test results. The power generation of the salt farm parallel system is comparable to conventional solar power plants. The cooling effect by sea water contributes more to the increase in the crystalline silicon photovoltaic module performance than the absorption loss due to sea water by maintaining certain height above the module.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2002년도 학술.기술논문발표회
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• pp.17-22
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• 2002

This Waterproofing Material which mainly consisted of 2 components of waste tire chip powder and waste glass powder. This Study is abut development of waterproofing Material, There is not tried in domestic. The most Motive of this Study wishes to recycle resources and get the economic performance for waterproofing Material The result of this Study is as followings. (1) Dense waterproofing floor is formed between waste tire chip by Coupling Agent(the most effective method to encourage adhesive strength and raise cohesion of material by combination.) (2) Expected to bring effect to shorten construction period at spot application potentially space-time in moisture aspect. Also, shortening effect of construction period and spot work are considered to be gone efficiently selecting pre-mix construction method. (3) This development Waterproofing material has elasticity that nature side compatibility of cement ingredient and plastic Emulsion have when utilize and constructs waite resources (being waste tire chip and waste glass powdered).

• Archives of Plastic Surgery
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• 제39권3호
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• pp.257-260
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• 2012

This report describes the use of a tubularized random flap for the curative treatment of recurrent anterior urethral stricture. Under the condition of pendulous lithotomy and suprapubic cystostomy, the urethral stricture was removed via a midline ventral penile incision followed by elevation of the flap and insertion of an 18-Fr catheter. Subcutaneous buried interrupted sutures were used to reapproximate the waterproof tubularized neourethra and to coapt with the neourethra and each stump of the urethra, first proximally and then distally. The defect of the penile shaft was covered by advancement of the surrounding scrotal flap. The indwelling catheter was maintained for 21 days. A 9 month postoperative cystoscopy showed no flap necrosis, no mechanical stricture, and no hair growth on the lumen of the neourethra. The patient showed no voiding discomfort 6 months after the operation. The advantages of this procedure are the lack of need for microsurgery, shortening of admission, the use of only spinal anesthesia (no general anesthesia), and a relatively short operative time. The tubularized unilateral penile fasciocutaneous flap should be considered an option for initial flap urethroplasty as a curative technique.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회 2차
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• pp.192-199
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• 2010

This research produced internal model tester ($2.0m{\times}2.0m{\times}1.0m$) to evaluate the field application of Paju Unjeong District water recycling system for small streams eco-friendly river bed disparity method for the first time in Korea and conducted comparative analysis of the Paju Unjeong District water recycling system field test results and infiltration rate result of internal tests by each rainfall intensity following surface material. Infiltration rate result of internal tests concrete pavement by rainfall intensity following surface material, asphalt pavement, bentonite mate, stabilized soil construction and mixed soil construction manifested low infiltration rate. On the contrary, compaction soil, grassland and water permeable packaging materials resulted in significant amount of infiltration rate. As for the field permeability test results, they were manifested similar tendency as indoor permeability test results and they satisfied the standard for standard of water permeability of domestic disparity facility (less than $1.0{\times}10-7cm$/sec). As compaction rate increased, unconfined compression strength increased as well while coefficient of water permeability decreased.

• 한국농공학회논문집
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• 제62권4호
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• pp.23-31
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• 2020

Recently, meteorological disasters have been increasing by climate change, excessive rainfall, and landslide. The purpose is to develop new fabric concrete that can prevent and recover from damages because some of areas are vulnerable to meteorological disaster. Specifically, this technology can minimize time and space constraint when repairing the concrete structure and installing a formwork. The structure of fabric concrete is a mixture of fabric concrete and a high-speed hardened cement, Silica sand, wollastonite mineral fiber, fabric material and waterproof PVC fabric. In this study, the ratio of mechanical properties and durability of the fabric concrete mixture was evaluated by deriving the binder: silica sand mix ratio of the fabric concrete mixture and substituting part of the cement amount with wollastonite mineral fiber. Best binder in performance evaluation: Silica sand mix ratio is 6: 4 and the target mechanical performance and durability are the best when over 15% wollastonite binder is replaced by silicate mineral fiber.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 C
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• pp.2019-2021
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• 2005

This paper describes the cut off time and the current characteristics of virgin RCDs and deteriorated ones in the seashore. The RCDs(Residual Current Protective Devices) are used for protecting the human body from electrical shock and for preventing facility accidents. According to the Korean standards, the RCDs are installed in panel boards. When RCDs are installed outside, they must be enclosed inside waterproof cases. In the case that RCOs are employed at temporary power sites and electrical facilities on the road, they are exposed to the external environment. As a result, the RCDs deteriorated in the seashore for 3 months showed high failure rate, while the virgin RCDs all complied with Korean Standard. Considering that the RCDs are used under exposed condition outside, the reliance of RCDs must be ensured by modifying the related regulations and codes and by developing Improved models advanced in their performance.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 봄 학술논문 발표대회
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• pp.222-223
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• 2020

Recently, as the era of economic cooperation on the Korean Peninsula approaches, the role of the building sector, such as humanitarian reorganization of North Korean housing, is increasing. The purpose of this study is to find out the current location of North Korean housing standards through the North Korean Housing Survey. For the survey, a survey was conducted through 79 North Korean defectors. The main construction methods of North Korean housing are reinforced concrete, steel framed, wooden framed, masonry, and reinforced concrete walled and prefabricated. The residential environment satisfaction items consist of durability, waterproof, heating, ventilation, heat insulation, air tightness, mining, soundproofing, disaster safety, fire safety, and crime prevention. The result is as follows. The housing construction method in North Korea, which lived at that time, consisted of 21 people (30.88%) of reinforced concrete frames, 18 people (26.47%) of wooden frames, 17 people (25%) of masonry walls, 5 people of prefabricated structures (7.35%), and reinforced concrete. Two people (2.94%) were walled. Among these, the wooden frame type had the lowest satisfaction level for each item, and the reinforced concrete had a high level of dissatisfaction in the items of heating, confidentiality, and disaster safety, and the other item had a high level of satisfaction. The masonry wall type has a relatively high satisfaction level in terms of insulation, confidentiality, mining, and disaster safety.

• 한국산학기술학회논문지
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• 제21권11호
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• pp.570-576
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• 2020

본 논문에서는 비콘과 스마트폰 GPS(Global Positioning System) 수신기를 이용하여 위치기반 쇠퇴지역 재난재해 위험성 예측 시스템을 구축하였다. 비콘은 주로 실내에 설치되어 실내의 삼각측위를 이용한 이용자 위치 파악에 사용되었으나 실외에 설치되어 위험지역 등록위치 및 온습도 정보 수집에 활용하여 기존 연구들과 차별성이 있다. 또한, 실외에 설치되기 때문에 비콘 자체의 방수, 방습, 방진 기능이 필요하며 온습도 비콘의 경우 센서가 외부에 노출되어야 하기 때문에 별도의 컨테이너로 방수 기능을 보완하였다. 이러한 기능을 바탕으로 쇠퇴·취약 지역을 실시간으로 정보를 파악하고, 온도/습도 정보를 수집한다. 또한, 해당 지역의 날씨 및 미세먼지 정보를 제공하는 시스템을 제안한다. 비콘과 스마트폰 GPS 수신기를 통해 사용자 위치 데이터가 습득되며, 사용자가 쇠퇴·취약 지역을 전송할 시 데이터를 구축하여 위험지역을 확인할 수 있다. 또한, 미시공간의 온도/습도 데이터를 수집하고 이를 활용해 기후변화에 대응할 수 있는 데이터를 구축할 수 있다. 데이터를 활용하여 미시공간에서의 쇠퇴지역을 구체적으로 파악할 수 있으며, 축적되는 데이터를 통하여 다양한 분석이 가능하다.

• 한국건설순환자원학회논문집
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• 제7권4호
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• pp.323-332
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• 2019

건설 방수재로 사용되는 고무아스팔트 씰재에 대한 한국 및 중국의 공동 품질관리 규정 제정을 위해 양국의 재료 및 품질기준 현황을 조사하고, 향후 방향을 제시한 연구다. 고무아스팔트 씰재에 대한 한중 무역교류가 추진되고 있 있으나, 국가 간에 제시된 품질기준이 달라 제품에 대한 품질 검증의 어려움이 있고, 이를 해소하기 위해 양국의 현황을 파악하여 공동 품질관리 규정 제정의 필요성을 제시하였다 .한국과 중국의 고무아스팔트 씰재에 대한 구성 재료 비교, 품질관리 기준(성능평가 항목)의 비교 결과, 구성 재료에 있어서 방수 성능을 발현하는 주성분 원료인 "아스팔트와 고무"의 사용 비율에 차이가 있고, 부원료(충전제, 증점제, 접착제 등)의 사용 소재 종류도 다르게 나타났으며, 성능평가 항목에 있어서도 양국의 요구 성능 항목이 크게 다르다는 것을 파악되었다. 이러한 문제을 해소하기 위하여 일반적으로 ISO(국제표준기구 : International Organization for Standardization)에서 제시한 표준 기준을 활용하는 등의 대안이 있으나 고무 아스팔트 씰재에 대한 방수재 ISO 표준은 전무하며, 한중간 무역 교류를 위하여 ISO 규격을 제정하기에는 소모되는 시간이나 비용에 따른 경제적 여건이 불합리한 상황이다. 이에 본 연구에서는 한중 양국 간에 공동으로 적용할 수 있는 품질규격을 제정하여 상호 무역 교류 시 이를 적용함으로써 제품에 대한 물성파악이 용이한 국제공동규격 제정을 위한 성능평가 요소로써 주요 성능 항목으로 "화학저항성능, 투수저항성능, 온도안정성능, 습윤면 부착성능"을, 부가 성능 항목으로 "균열 거동 대응성능", "점도", "고형분" 등 7가지 항목을 제시하였다.

• 한국지반환경공학회 논문집
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• 제12권1호
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• pp.71-80
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• 2011

급속한 경제발전시기에는 하천공사 시 유해한 재료를 사용함으로써 환경오염으로 인한 인간 및 동식물에 악영향을 끼치는 사례가 많이 발생하였다. 이를 복구하는 시간 및 비용이 많이 소요되는 실정이다. 따라서 본 연구에서는 하천공사 중의 차수공사시 환경오염 문제점을 극복할 수 있는 친환경적이면서 경제적으로 저렴하고, 장기적으로 사용할 시 내구성에 문제없는 공법을 적용하고자 실내모형실험결과와 현장실험결과를 비교 분석하였다. 실내실험결과 콘크리트 포장재, 아스팔트 포장재, 벤토나이트 매트, 고화토공법, 혼합토공법은 적은 침투량을 나타내었고, 이와 반대로 다짐흙, 초지, 투수성 포장재는 많은 양의 침투량이 발생되었다. 현장투수실험결과는 실내실험투수결과와 비슷한 경향을 나타냈으며, 국내차수시설 투수기준인 $1.0{\times}10^{-7}cm/sec$ 이하에 모두 만족하였다. 또한, 일축압축강도는 1.0MPa 이상 결과값을 얻어 기준에 만족하였고, 다짐도가 증가할수록 일축압축강도는 증가하고 투수계수는 감소하는 경향을 확인할 수 있었다.