• 한국작물학회지
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• 제19권
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• pp.32-38
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• 1975

호남지방의 습답수도작개량을 목적으로 지하배수에 관한 시험을 실시하기 위하여 암거를 설치하고 시비량은 다비, 보비, 다비구를, 재식밀도는 소식, 표준, 밀식구를 두어 시험을 실시한 결과는 다음과 같다. 1. 배수처리는 하므로서 출수기와 성숙기의 지상부 건물중은 수량과 유의적 정상관을 보였다. 2. 배수구에서 등숙기간 엽신중 질소함량의 감소량과 수량과는 $r=0.696^*$의 정상관을 보였으나 흡수질소량의 감소랴오가 수량과는 $Y=220.7+200.7x-35.3x^2$의 이차회귀를 보였다. 3. 주당근수는 무배수구에서 많았으며 재식밀도간에 큰 차이가 없었으나 배수구에서는 재식밀도증가에 따라 주당근수의 감소는 현저하였다. 4. 근태, 근장, 근모의 형성등은 배수구에서 월등히 증가하였으며 아울러 주당근중이 무거웠다. 5. 뿌리의 활력은 소비구의 상우근을 제외하고는 배수구에서 현저히 높았다. 6. 배수처리는 등숙율과 천립증가에 특히 유효하였다. 7. 수량은 무배수구에 비하여 배수구에서 소비소식구는 1~4%의 감수를 보였으나 그 외 모든 처리는 3~13%의 증수를 보였는데 그 효과는 시비량의 증가보다 재식밀도증가에서 더 현저하였다.

• 한국조경학회지
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• 제33권5호통권112호
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• pp.69-82
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• 2005

These studies were carried out (1) to investigate the growth characteristics of Sedum album L. in the field, (2) to propose a suitable shallow peen roof system for this plant, and (3) to evaluate plant growth in the proposed system over the long term. The growth characteristics, such as morphological properties, growth habit, shade tolerance, and flowering, were surveyed. In experimental shallow green-roof systems, the effects of drainage type, substrate type, and soil depth on plant growth were investigated. Then drought tolerance was investigated. After planting Sedum album L. in the proposed system survival rate, cover, and resistance to insects, heal and cold were evaluated for about 2 years. The results of these studies are summarized below. 1. In the field, the aboveground part of Sedum album L. did not die back during the winter. Plant height was 4$\sim$7 cm. Roots were distributed to a depth of 5$\sim$7 cm. Sedum album L. is a compact ground-cover plant that spreads vigorously. Shading condition of less than $30\%$ of full sunlight didn't cause any trouble, but shading conditions above $87\%$ made the shape of the shoots and leaves abnormal. The plant bloomed from June to August and had a rather large compound umbel of white, star-shaped flowers. 2. Two systems, a drainage-blend-10 cm soil depth and a reservoir$\cdot$drainage-blend-15 cm soil depth, performed best in terms of cover, fresh weight, and dry weight. The first has an advantage for green roofs because it is lighter than the latter. 3. In drainage-blend-10 m soil depth and modified reservoir · drainage-blend-10 cm soil depth system no plants died for about 4 months after stopping the irrigation. The visual quality of the latter system was above 5 for 4 months and that of the former was under 5 after 2 months. In the field, however, the drought tolerance of Sedum album L. grown in the former would be enough to withstand the dry season. Considering the urban ecosystem and the importance of healthy growth the modified reservoir $\cdot$ drainage-blend-10 cm soil depth system was finally recommended. This system was composed of a 4 cm thick drainage layer and drain outlets placed at a height of 2.5 cm. 4. In the proposed system, the survival rate was $100\%$, and there was no injury induced by insects and heat. The leaf density decreased a little in winter. Cover increased throughout the year. Sedum album L. was planted with a cover of 72$cm^{2}$ on 3 April 2003; on 16 June 2003 and 15 June 2004, cover was $132.66\pm$5.87 $cm^{2}$(1.8 times) and $886.98\pm$63.51 $cm^{2}$(12.3 times), respectively.

• 한국농공학회지
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• 제34권4호
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• pp.59-68
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• 1992

A Study was made to improve soil and water temperature and mechanized farming for a wetted paddy under the influence of artesian groundwater located at Samcheon-Dong, Chuncheon City, Kangweon Province. Half perforated PVC drainage pipes were installed in the test paddy to observe temperature change of water and soil. The temperature of the water in the paddy and soil itself raised significantly after the installation of the half perforated PVC pipes. A subsequent improvement of growth and yield of rice on the paddy was achieved. Harvesting operation was also improved with firm ground condition so that cutting and threshing could be done simultaneously within the paddy plot. Following results were obtained from the study. 1.Temperature of the water in a paddy under the influence of artesian groundwater was not changed notably although air temperature was fluctuated during the crop period. Soil temperature was mostly affected by the artesian groundwater. However, the half perforated PVC pipe drainage system made it possible to raise temperature of water and soil remarkably up to the level of optimum farming. 2.Total precipitation was 534.Omm during the crop period of the paddy for 118 days from May 26 to September 20 in 1992. Due to heavy rainfalls of 105.6mm and 109.8mm occurred on August 7 and August 27.1992, respectively, the rate of the artesian groundwater increased to 35 litter per minute with two to three days of time lag. 3.Average rate of the artesian groundwater was 28 litter per minute from the one year of observation. The rate varied by 0.7 to 1.3 times of average during the observation period. Peak rate of the artesian groundwater decreased to 14.5 litter per minute when daily precipitation maintained at the amount of 20 to 30mm for a long time period. Contrarily, it showed a tendency to increase to 35 to 40 litter per minute when heavier precipitation of 50 to l00mm occurred in a short period of three to five days. 4.Growth and yield of Yemyung variety of rice planted on the paddy that was facilitated with a drainage system with half perforated PVC pipes were confirmed at a normal level, while paddy without this perporated drainage system showed abnormal growth with low yield.

• Journal of Chest Surgery
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• 제30권7호
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• pp.693-700
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• 1997

싣낭삼출액에 대한 검상하 심낭배액술의 임상적 효용성을 알아보기 위하여 1986년 1월부터 1995년 12월까지 10년간 서울대학교병원 흉부외과에서 검상하 심낭배액술을 시행 받았던 총 80명의 환자를 대상으로 임상 기록을 분석하였다. 남녀 구성은 남자 39명, 여자 41명이었으며, 연령은 20세에서 80세까지 분포하였고 평균 50$\pm$15세였다. 수술 전 모든 환자에서 심초음파 검사를 시행하여 심방삼출을 확인하였다. 50명(62.5%)의 환 자는 전신마취 하에 수술을 시행하였고 30명(37.5%)의 환자는 국소마취 하에서 수술을 시행하였다. 악성종양 에 의한 심낭삼출액은 33례(41.3%)였으며 이들 중 결과 확인이 가능했던 31례의 심낭액 세포검사와 29례의 심낭조직 생검 결과 각각 14례(45%)와 7례(24%)에서 양성이었다. 결핵성 심낭삼출액은 27례(33.8%)였으며 이 들 중 12례(44.4%)에서 확진이 가능했는데, 배양검사에서 결핵균이 자란 경우는 1례 뿐이었고, 조직생검에서 건락괴사를 동반한 만성 육아종성 염증소견이 확인된 경우는 12례였다. 수술사망은 14례(17.5%)였으며 모두 악성 심낭삼출 환자였다. 수술사망 환자 중 수술수기와 직접 연관되어 사망한 경우는 없 駭\ulcorner 수술사망 14례를 제외한 나머지 66명의 환자들에 대한 추적관찰 기간은 9일에서 5년까지로, 평균 452일이었다. 추적기간 중 심낭삼출의 재발로 다시금 심낭배액술이 필요했던 경우는 모두 6례(7.5%)였으며 그중 1례는 재수술 직후 갑작스런 심정지로 사망하였다. 만성 압박성 심낭염으로 이행되었던 경우는 4례(5%)였으며 이들 중 2명은 심낭절제술을 시행 받았다. 결론적으로 검상하 심낭배액술은 비교적 간편하고 안전하게 시행할 수 있으며, 심낭배액술시 시행하는 심낭액 세포검사와 조직생검을 통해 원인 진단에도 도움을 줄 수 있다고 생각된다.

• 한국작물학회지
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• 제27권3호
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• pp.276-282
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• 1982

본 시험은 1981년에 참깨품종 "수원 9호"를 Pot에 공시하여 토양의 배수력 차이에 따른 참깨의 생육과 수량형성의 차이를 구명하고자 시도되었다. 즉 점토와 세사를 용량비(V/V Ratio)로 각각 0:100, 25:75, 50:50, 75:25 및 100:0가 되도록 혼합한 토양에 6일 간격 20mm 관수와 3일 간격 10mm 관수의 효과와 반응차이를 해석하였다. 토양의 용량비에 따른 수분의 배수성은 점토혼합율에 따라 거의 직선적으로 감소하는 경향이었다. 토양배수성 차이에 따른 참깨의 생육반응은 순세사토에서만 한해가 인정되므로 관수의 증대가 요구되었고 그 외의 배수조건의 차이에 따른 생육반응에는 통계적 유의차가 없었다. 수량구성요소 가운데서 수량에 기여도가 가장 컸던 것은 주당삭수로서 수량과 마찬가지로 점토와 사토가 75%:25%로 혼합된 조건 즉 배수성보다는 보습성이 양호한 토양에서 가장 많았으며 삭당입수나 등숙성은 선행형질인 주당삭수와의 부적상관 때문에 보습성 보다는 배수성이 양호한 토양에서 증대되는 경향을 나타내었다. 관수방법간에 이들 수량구성 특성의 차이는 없었으나 수량은 6일 간격 20mm보다 3일 간격 10mm 관수로서 보습력(점사율 75%:25%)이 높은 조건에서 최다수준이었으며 과도한 배수성이나 보습성의 조건에서는 뚜렷한 감수의 경향이었다.감수의 경향이었다.

• 대한장애인치과학회지
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• 제8권1호
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• pp.15-21
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• 2012

Extraction of all nonrestorable teeth prior to bone marrow transplantation is the major dental management of the patient being prepared for the transplantation. But, there are four principal causes for excessive bleeding in the immediate postextraction phase ; (1) Vascular wall alteration (wound infection, scurvy, chemicals, allergy) (2) Disorders of platelet function (3) Thrombocytopenic purpuras (4) Disorders of coagulation (liver disease, anticoagulation drug-heparin, coumarin, aspirin, plavix) If the hemorrhage from postextraction wound is unusually aggressive, the socket must be packed with local hemostatic agent and wound closure & pressure dressing are applied. But, in dental alveoli, local hemostatic agent (gelfoam, surgcel etc) may absorb oral microorganisms and cause alveolar osteitis (infection). This is a case report of bleeding and infection control by suture, pressure packing and iodoform gauze drainage on infected active bleeding extraction socket under sedation and local anesthesia in a 57-years-old multiple disabled patient with anticoagulation drug.

• 한국지반신소재학회논문집
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• 제15권2호
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• pp.35-44
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• 2016

PET 인공골재의 배수특성 평가를 위하여 실내 수평투수실험, 실대형 수평투수실험을 실시하였다. 실내 수평투수실험은 PET 골재의 생산량에 따라 세 종류의 입도별로 분류하고, 분류된 PET 골재를 정해진 배합비에 의해 20가지로 분류하여 단계별 하중을 재하하면서 실시하였다. 또한 실내 수평투수실험에 의해 분석된 결과를 활용하여 재하하중에 따른 투수계수의 변화경향이 가장 적은 실험 유형의 배합비로 실대형 수평투수실험을 실시하였고, 실내 수평투수실험 결과와 비교하여 신뢰도를 평가하였다.

• 펄프종이기술
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• 제46권6호
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• pp.78-86
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• 2014

Since cellulose nanofibrils (CNF) has large specific surface area and high water holding capacity, it is very difficult task to remove water from the CNF suspension. However, dewatering of CNF suspension is a prerequisite of following processes such as mat forming and drying for the application of CNF. In this study, we evaluated the drainage of cellulose fibers suspension under vacuum and pressure conditions depending on the number of grinding passes. Also, the effect of the addition of cationic polyelectrolyte on dewatering ability of CNF suspension was investigated. Regardless of dewatering condition, the total drained water amount as well as the drainage rate were decreased with an increase in the number of grinding passes. Pressure dewatering equipment enables us to prepare wet CNF mat with relatively higher grammage. The cationic polyelectrolytes improved the dewatering ability of CNF suspension by controlling the zeta potential of CNF. The fast drainage was obtained when CNF suspension had around neutral zeta potential.

• 한국관개배수논문집
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• 제18권1호
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• pp.4-17
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• 2011

The standard design methodology was suggested to construct wetland system for reducing non-point source pollution from Saemangeum reclaimed paddy land. To set for the design flow and concentrations, runoff and water quality survey were conducted during the irrigation period in 2008 at Gyehwa reclaimed paddy land located at near Saemangeum lake. It is rational that 1ha is the optimum constructed wetland size. To meet this size, the moderate drainage area of reclaimed paddy field was 50ha under the conditions that rainfall is 30mm, average runoff coefficient is 0.83, and runoff capture ratio is 0.6. At these condition, the runoff volume from 50ha was 10,520 $m^3/d$ including base flow during irrigation period. To select the optimum wetland system, several case studies were conducted by focusing on the tidal reclaimed land areas having wetland systems in Seokmun. Pond-Wetland system was selected as the standard model because of showing the highest reduction efficiency. Single variable regression equation were delivered to estimate effluent water concentrations from the designed wetland by using long-term monitoring data from the Seokmun experiment site. The effluent concentration from the designed wetland using these equation were showed moderately range.

• 한국지하수토양환경학회지:지하수토양환경
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• 제26권1호
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• pp.34-44
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• 2021

Acid mine drainage (AMD) resulting from pyrite oxidation in mining areas, subsequently leads to soil acidification accompanied by lowering pH and high concentration of metals and metalloids in its surrounding environment. Regarding to this, the microbial amelioration has been considered as a promising option for a more cost-effective and eco-friendlier countermeasure, compared to the use of alkaline chemicals. This study was aimed to evaluate influencing factors in microbially-mediated amelioration of acidic soil spiked by simulated AMD. For this, microcosm experiments were conducted by acid-neutralizing bacterial consortium (dominated by Klebsiella sp. and Raoultella sp.) under the various conditions of AMD spikes (0-2,500 mg SO42-/L), together with acidic mine soil (0-100 g) or sphagnum peat (0-5 g) in the 200 mL of nutrient medium. The employed bacterial consortium, capable of resisting to high level of sulfate concentration (up to 1,500 mg SO42-/L) in low pH, generated the ammonium while concomitantly reduced the sulfate, subsequently contributing to the effective soil stabilization with an evolution of soil pH up to neutral. Furthermore, it demonstrates that suitable condition has to be tuned for successful microbial metabolism to facilitate with neutralization during practical application.