• Journal of Chest Surgery
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• 제24권11호
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• pp.1107-1114
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• 1991

We have experienced fourteen patients of esophageal perforation at the department of thoracic and cardiovascular surgery, Chonbuk National University Hospital during the period from mar. 1980 to Oct. 1990. The ratio between male and female patients was 5 : 9, and their age ranged from 22 years to 69 years. The causes of th eesophageal perforation were iatrogenic in 6 cases, foreign body 5 cases, diverticulitis 2 cases, and postpneumonectomy 1 case. The locations were cervical esophagus in 2 cases, upper thoracic in 2 cases, mid-thoracic 4 cases, and lower thoracic 6 cases. The underlying diseases associated with perforation were lye stricture, diverticulum, achalasia, and postpneumonectomy empyema. The treatments were supportive in 6 cases and combined with surgical measures in 8 cases. surgical measurs were as follows : incision and drainage in 2 cases, esophagectomy with esophagogastrostomy 3 cases, esophagocardiomyotomy with partial fundoplication in 1 case, simple closure with myoplasty and thoracoplasty 1 case, and empyema drainage and gastrostomy 1 case. There was no mortality.

• Journal of Chest Surgery
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• 제15권3호
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• pp.274-277
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• 1982

A Clinical analysis of 59 patients of thoracic empyema was done who were received surgical intervention at dept. of thoracic surgery of the C.A.F.G.H. in the period of 2.5 years from January 1979 to June 1982. Occurrence ratio of Left and Right side pleural cavity of empyema was 1: 1.4. The predisposing factors of empyema were pulmonary Tbc. [49%], Chest pain [25%], Cough [8%], in order. B.P.F. was associated with empyema in 5 cases. The pleural cavity empyema was treated with several surgical procedures and conservative measures. Among of the 59 cases, the 30 cases [50%] were treated with decortication, 12 cases [20%] with closed thoractomy drainage, 9 cases with frequent thoracenteses, 5 cases with partial decortication and thoracoplasty and 3 cases with open thoracostomy tube drainage. Among of the 59 cases thoracic empyema, the full recovery were in 32 cases [54%], partial recovery in 20 cases [34%], not improved in 3 cases [5%] and 3 cases were died. The mortality rate was 5% and the recovery rate was 89%.

• 한국농공학회논문집
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• 제49권5호
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• pp.3-9
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• 2007

In this study, the effect of the purification materials is analyzed and tested by Flow 3D and Hydraulic model test. Three dimension numerical analysis led from the research that sees abnormal form and the size back of the water purification material conferred the flowing water conduct inside the test channel against the test condition. Comparison it analyzed the flux distribution, a water depth of the channel which establishes the water purification materials the cross section, an interval of the water purification material, a conference with general channel, it change executed. As a result, the cross section ratio of the purification materials against and a flux change from the test which it sees. The interval of the purification materials in order to prevent three dimension that follows in decrease of increase and flux must decide an interval.

• Journal of Chest Surgery
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• 제27권1호
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• pp.43-47
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• 1994

Prompt recognition and proper treatment of esophageal perforation or rupture may ax~ert death or minimize complications. We have experienced sixteen patients of esophageal perforation at the department of thoracic and cardiovascular surgery, Hallym Medical college during the period fromJan. 1986 to Sep. 1993. The ratio between male and female patient was 13:3 and their age ranged from 23 years to 67 years old. The major cause of esophageal perforations was spontaneous rupture in 7 cases[45%], surgical trauma in 2 cases[12%], instrumental trauma in 2 cases[12%], and others in 5 cases[31%]. The common site of esophageal perforation was in the lower third portion of the esophagus[10 cases, 62%]. The most consistent symptom of esophageal perforation was chest pain in 11 cases, temperature elevation within a few hours was 9 cases.Contrast roentgenographic studies demonstrated the perforation in all but 2 of the 16 patients. The frequent complications of esophageal perforation were empyema in 7 cases[45 %] and mediastinitis in 2 cases[12%]. fourteen patients had suture closure and drainage with 2 deaths, and 2 patient received only drainage procedures. The mortality rate was 12%[2 cases] and cause of death was sepsis and aortic rupture.

• 동굴
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• 제62호
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• pp.1-9
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• 2004

이 연구의 목적은 우로굴의 발달과정과 지형적 특성과의 관계를 밝히려는 것이다. 이 지역의 산계는 북서부, 중부, 남동부로 지역구분이 가능하다. 수계는 3차수 하천이 발달하였으며, 분기율은 7.0과 4.0이다. 하계망의 발달이 유리하지않은 지역이며 따라서 하계밀도도 주변지역보다 낮다. 지질은 퇴적암류, 변성암류, 화성암류가 다양하게 분포되어있다. 토양의 분포는 구릉지와 산악지에 분포하는 암쇄도 및 적황색토, 구릉지와 산록지에는 석회암이 잔재된 적황색색토 또는 암쇄토가 발달되어 있다.

• 한국토양비료학회지
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• 제49권3호
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• pp.287-292
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• 2016

The objectives of this study were to investigate the effects of soil neutralizing treatments on soil characteristics and growth of Aster koraiensis in the acid soil of abandoned metal mine for selection of proper neutralizer. The most effective neutralizers were acid mine drainage sludge, waste lime + oyster and compost. Those neutralizing treatments showed promoting growth of Aster koraiensis. According to this study, it is applicable of acid mine drainage sludge, waste lime + oyster and compost to neutralize acid soil for rehabilitation in abandoned metal mine. However, follow-up study is necessary to calculate proper ratio of each neutralizer.

• 한국안전학회지
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• 제29권1호
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• pp.31-36
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• 2014

In this study, the methodologies for evaluating the low-flow at the ungauged watershed are reviewed and assessed. The ungauged watershed can be classified into different situations such as the partially recorded watershed and the completely ungauged watershed. The extension method and the percentile method are used to evaluated the low-flow at the partially recorded watershed. The drainage-area ratio method and the regional regression method are used at the completely ungauged watershed. These four methods are applied and validated based on the hydrological and geometric data acquired from unit watersheds in Han River basin for TMDLs. In case of partially recorded watershed, the values of low-flow evaluated by the extension method are in better agreement with measured flow-rate rather than those by the percentile method. In case of completely ungauged watershed, the drainage-area method is broadly used to estimate the low-flow. It must be paid attention to consider the treated sewage discharge produced at watersheds when applying the method.

• 한국관개배수논문집
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• 제13권1호
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• pp.82-90
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• 2006

The practical date of rice growing stages and the date for calculating the water demand in paddy field have differences. The causes are rice planting water requirement, nursery bed area and change of average temperature and so on. Some recent papers have shown the same results. So we have investigated the nursery period, rice transplanting period and mid-summer drainage and developed a system for estimating water demand. And we calculated the water demand by using the system. The result showed that calculation by using the new system is more appropriate than the calculation by using the established period. But because water losses in canals and crop coefficient are not determined appropriately, we can calculate the agricultural water demand more accurately by dstablishing canal losses ratio, crop coefficient and so on.

• 한국산림과학회지
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• 제107권3호
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• pp.278-286
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• 2018

본 연구는 강원대학교 학술림 임도를 대상으로 횡단배수구의 유출구 피해 유무에 영향을 미치고 있는 총 10개 인자를 조사하여 피해특성을 파악하였다. 그 결과는 다음과 같다. 임도횡단배수구 피해유무에 영향을 미치지 않은 인자는 배수구의 종단위치, 횡단위치, 토질 및 관암거 높이이며, 피해영향에 관련된 인자는 유출구 위치, 도수로 유무, 관암거 직경, 관암거 경사, 집수정 크기 등의 순으로 영향을 미치고 있다. 또한 이들 인자를 이용하여 임도횡단배수구 유출구 피해유무 예측을 위한 판별함수식을 도출하였으며, 판별적중률은 68.8%로 산출되었다.

• 대한토목학회논문집
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• 제36권3호
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• pp.407-416
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• 2016

본 연구에서는 미계측 유역의 평균갈수량 추정을 위한 지역회귀모형을 개발하고자 하였다. 12개 다목적댐과 4개의 용수댐에서 관측된 조절되지 않은 유입량 자료로부터 평균갈수량을 산정하였고, 이를 유역면적, 유역경사, 유역밀도, 연평균강수량, 유출곡선지수 등의 유역특성인자와의 상관분석을 통해 다양한 형태의 지역회귀모형을 개발하였다. 평균갈수량의 관측값과 추정값의 비교를 통해 각 회귀모형의 성능을 평가하였고, 유역면적, 연평균강수량, 유출곡선지수를 설명변량으로 하는 회귀모형이 가장 우수한 성능을 보였다. 또한 비유량법과 기존에 개발된 기존회귀모형과의 비교를 통해서 본 연구에서 개발한 모형의 적용성이 가장 우수한 것으로 분석되었다.