• 한국환경과학회지
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• 제13권3호
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• pp.197-204
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• 2004

In this study analyzed the reliability indices against the water supply ability of Andong dam. The water supply analysis of Andong dam used the HEC-5 model. So Andong dam simulated planed water-supply capacity of Andong dam as increase and decrease +5% ～ -5% of water supply quantity. Water-supply capacity of Andong dam estimated, deficit occurrence, deficit quantity, deficit period. As the results estimated reliability(occurrence based, time based, quantity based) and resiliency vulnerability and with water supply capacity evaluation indices of Andong dam. Also reliability(occurrence based, time based, quantity based), resiliency, vulnerability and resiliency indices are estimated to evaluated the performance of water supply on Andong dam, and their relationships are evaluated.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.267-268
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• 2012

To evaluate the incoming salt quantitatively which is the reason of salt attack is a very important aspect to calculate the durability life of the structure. Incoming salt is influenced by various weather changes during the transmission and consequently, the changes of incoming salt quantity occur. Therefore, the study to analyze incoming salt quantity was executed which are changed by the weather environments (occurrence frequency of wind direction / wind speed); study results showed that influences to the changes of incoming salt quantity are bigger than those of wind speed, compared with the frequencies.

• 한국전기전자재료학회논문지
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• 제28권1호
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• pp.34-39
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• 2015

In this study, the characteristics of partial discharge was measured for the four core silicone cable (0.6/1.0 kV, $1.0SQ{\times}4C$) with insulated part of 15 cm and conductor of 1cm. The following results have been confirmed as a result of this study. When the first line of cable is connected to the positive electrode and the second, third line of cable is connected to the negative electrode, it found that the inception voltage and extinction voltage decreased with increasing the line of negative electrode, and the partial discharge charge quantity(Q) increases, while the number of discharge occurrence has decreased. The inception voltage and extinction voltage of partial discharge has decreased with increasing the degradation rate in the 33%, 67%, 100%. Also, it confirmed that the partial discharge charge quantity(Q) and the number of discharge occurrence has decreased.

• 한국습지학회지
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• 제13권3호
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• pp.443-453
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• 2011

본 연구는 소유역별 토지피복특성을 분석하고, 각 소유역로부터 발생되는 비점오염원 부하 특성을 분석하여 각 소유역별로 토지피복특성에 적합한 오염부하 저감 대책을 수립할 수 있는 방법을 제시하는 것을 목적으로 하고 있다. 연구대상유역은 무심천 유역으로 하였으며, 사용된 수질모형은 HyGIS-SWAT을 이용하였다. 토지피복도 분석에서 특정 분류항목이 50%이상의 토지피복 비율을 갖는 토지피복에 따라 시가화지역, 농업지역, 그리고 산림지역으로 구분하여 유출부하 특성을 분석하였다. 분석결과 유사량 및 영양염류의 연간 발생부하량의 크기는 농업지역, 산림지역, 시가화지역의 순서로 발생되는 것으로 분석되었다. 2번 소유역에 대해서 하천을 중심으로 버퍼구역을 설정하고 버퍼구역내 농업지역을 자연초지로 토지피복을 변화시켜 발생부하량을 분석하였다. 분석결과 토지피복변화는 변경전과 비교하여 토지피복변화는 농경지 면적이 소유역내 36.6%에서 27.9% 및 15.3%로 변화되는 것으로 나타났다 2번 소유역에 대한 유사발생량 및 영양염류 발생량 분석결과 유사발생량은 52%에서 약 46% 정도 감소하는 것으로 분석되었고, 영양염류의 경우에도 변경전보다 49% 34% 정도 감소하는 것으로 분석되었다. 향후 추가적인 연구는 각 소유역별로 다양한 오염부하 저감 대책 시나리오를 수립한 후 어떠한 저감대책이 효과적인지를 평가하는 연구를 수행하고자 한다.

• 한국환경과학회지
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• 제15권3호
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• pp.261-269
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• 2006

In this study, an optimization technique was developed from the application of allocation rule. The results obtained from the water supply analysis and reliability indices analysis of Andong dam and Imha dam which are consist of parallel reservoir system are summarized as the followings; Allocation rule(C) is effective technique at the parallel reservoir system because results of the water supply analysis, storage analysis and reliability indices analysis is calculated reasonable results. Also, reliability indices analysis results are not sufficient occurrence based reliability or quantity based reliability. Thus reliability indices analysis are need as occurrence based reliability, quantity based reliability vulnerability, resilience, average water supply deficits and average storage. And water supply condition is better varying water supply condition than constant water supply condition.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2004년도 제5회 정기학술발표대회 논문집
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• pp.329-334
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• 2004

건설현장의 환경관리가 강화되고 있는 방향으로 나아가고 있는 상황에서 기업의 입장에서는 좀더 효율적인 건설현장 환경관리가 필요하며, 건설폐기물의 관리는 그 중 가장 중요한 부분을 차지할 것이다. 부적절한 건설폐기물 처리에 의한 환경오염 및 환경파괴문제를 최소하기 위하여 발생량 데이터베이스 구축과 건설폐기물 발생량 예측방법이 필요하다. 바로 이러한 건설폐기물 발생량의 현실적인 예측을 위한 회귀모델을 제시하는 것을 본 연구의 목적으로 한다. 이 회귀모델은 건설공사의 실행예산을 작성하는 단계에서 폐기물 발생량을 좀더 정확하게 예측함으로써 효율적인 건설현장 환경관리가 가능하게 해주는 하나의 방법으로 제시하고자 한다. 건설회사들이 폐기물 발생량에 대해 지속적인 관심을 가진다면, 꾸준한 실적데이터 데이터베이스화를 통한 회귀모델로도 사전에 어느 정도 폐기물 발생량을 정확하게 예측할 수 있을 것이다. 이처럼 방법론적인 관점에서 하나의 모델을 제시했다는 데 연구 의의를 찾을 수 있을 것이다.

• 한국토양비료학회지
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• 제22권1호
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• pp.53-60
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• 1989

수도(水稻)의 급성위조증상(急性萎凋症狀) 발생원인(發生原因)을 명확(明確)히 하기 위(爲)하여 전보(前報)에서 실시(實施)하였던 동일방법(同一方法)으로 우리나라의 기상조건(氣象條件) 및 답토양(畓土壤)을 공시토양(供試土壤)으로하여 인위적(人爲的)으로 급성위조증상(急性萎凋症狀)을 재현유기(再現誘起)하면서 근활력(根活力)과 도체내(稻體內)의 영양상태(營養狀態)가 위조증상발생(萎凋症狀發生)에 미치는 영향(影響)을 비교검토(比較檢討)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 공시(供試)한 품종(品種)의 위조증상발생(萎凋症狀發生) 및 피해정도(被害程度)와 발생시기(發生時期) 등(等)은 전보(前報)에서의 결과(結果)와 같았다. 2. 위조증상발생(萎凋症狀發生)과 관련(關連)하여 출수기경엽중(出穗期莖葉中)의 질소함량(窒素含量)과 칼리함량간(含量間)에는 "유신(維新)" - 0.9224, "밀양(密陽)23호(號)" - 0.8243의 높은 부(負)의 상관관계(相關關係)가 있었다. 3. 위조증상발생(萎凋症狀發生)과 생육시기별(生育時期別) 근활력(根活力)과의 관계(關係)는 위조증상(萎凋症狀)이 발생(發生)한 "유신(維新)" 및 "밀양(密陽)23호(號)" 모두 생식생장기(生殖生長期)보다 영양생장기(營養生長期)의 근활력(根活力)이 우세(優勢)하였으며 "유신(維新)"보다 "밀양(密陽)23호(號)"에서 근(根)의 활력(活力)이 높게 유지(維持)되었으나 이들 품종(品種)의 근활력(根活力)은 생식생장기(生殖生長期)에 현저(顯著)히 저하(低下)하는 특징(特徵)이 있는것이 재확인(再確認)되었다. 4. 위조증상발생(萎凋症狀發生)이 비교적(比較的) 적었던 칼리시용구(施用區)의 근활력(根活力)과 칼리무시용구(無施用區)의 근(根)의 활력간(活力間)에는 "유신(維新)" 0.8947, "밀양(密陽)23호(號)" 0.7301의 높은 정(正)의 상관계수(相關係數)를 나타내었다. 5. 위조증상발생(萎凋症狀發生)과 수분증산량(水分蒸散量)과의 관계(關係)를 보면 엽위별(葉位別) 증산량(蒸散量)은 출수전(出穗前)보다 출수후(出穗後)의 수분증산량(水分蒸散量)이 관계(關係)가 있는 것으로 추찰(推察)되었으며 위조증상(萎凋症狀)이 발생(發生)한 칼리무여용구(無旅用區)에서 수분증산량(水分蒸散量)이 많았고 상위엽(上位葉)보다 하위엽(下位葉), "밀양(密陽)23호(號)"보다 "유신(維新)"에서 명확(明確)하였다. 6. 등숙기(登熟期) "유신(維新)" 및 "밀양(密陽)23호(號)"의 간(稈)의 전분함량(澱粉含量)은 칼리시용량(施用量)에 따라 높은값을 나타냈으며 하위절간(下位節間)일수록 전분함량(澱粉含量)은 낮았으나 제(第)4절간(節間)에는 칼리무여용구(無旅用區)에 비(比)하여 칼리시용구(施用區)에서 크게 증가(增加)하는 것이 확인(確認)되었다.

• Journal of Ginseng Research
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• 제22권4호
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• pp.299-303
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• 1998

To know possibility of raw ginseng production for white- and red-ginseng by direct-sowing culture, seeds were directly sowed or seedlings were transplanted at soil condition of sandy loam in ginseng field. After cultivation, the characters of 5-year-old ginseng were investigated. Number of survived plants was increased with increase the seeding quantity in direct-sowing culture, the survived plants in direct-sowing culture was higher than that of transplanting one. Rate of the numbers of survived plants to numbers of seeds sowed in plots of 134 or 90 seeds sowed per tan, 180 x 90cm area, inspire of high number of survived plant was high compared to that of transplanting culture. Occurrence rate of rusty root of ginseng in direct-sowing culture was low significantly compared to that of transplanting culture. Root yield showed in the order of 134, 268, 90 seeds sowed, the values of yield in direct-sowing culture were high obviously compared to that of transplanting one. Individual root weight was increased with decrease the seeding quantity, however, the root weight in plot of 90 seeds sowed showed almost equal the weight in transplanting culture. The number of usable raw ginseng for white- and red-ginseng was increased with decrease of the seeding quantity; the numbers were higher than that of transplanting culture remarkably. We concluded that optimum seedling rate in direct-sowing culture of ginseng was 90 to 134 seeds per tan considering the yield per area and production rate of large root.

• KIEAE Journal
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• 제7권4호
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• pp.113-118
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• 2007

From the construction material the cement and the concrete which will reach to 90% are used to construction. But the cement occurrence (from the whole industry 4.4% of carbon dioxide exhaust quantity) makes the carbon dioxide of manufacture hour and anti- the recognition which is an environment industry. The cement absorbs the carbon dioxide during life period of the life time. It calls carbonation. In this study in order to evaluate the carbon dioxide absorption of the cement test produced the mortar specimens which it follows in the W/C. And carbonatable material of mortar specimens (calcium hydroxide) the quantitly it measured, reference study it led and absorption of carbon dioxide quantity it produced. Finally two result comparisons leads and it is a fundamental study which does the test evaluation possibility and a propriety investigation of carbon dioxide absorption quantity in objective.

• 한국도로학회논문집
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• 제14권5호
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• pp.123-132
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• 2012

PURPOSES: This study is to investigate the consideration which relates with a disaster from route alignment process and proposed the method it will be able to evaluate a disaster danger fixed quantity. METHODS: Use the landslide disaster probabilistic map of GIS based and in about landslide occurrence of the route alignment at the time of neighboring area after evaluating a risk fixed quantity, it compared LCC expense in about each alternative route. It developed the system it will be able to analyze a LCC and a disaster risk in about the alternative route. In order to verify a risk analytical algorithm and the system which are developed it selected national road 59 lines on the demonstrative route and it analyzed a disaster risk. RESULTS: Demonstrative route not only the disaster risk to be it will be able to compare a disaster risk fixed quantity like the economical efficiency degree in compliance with LCC expense productions it compared and there being the designer will be able to decide the alternative route, it confirmed. CONCLUSIONS: Roads can be designed by considering occurs repeatedly landslides and debris flow caused by disasters in advance and expect to be able to effect that can reduce the overall cost to recover losses caused by the disaster, and temporally loss is expected.