• Journal of Chest Surgery
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• v.20 no.4
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• pp.683-687
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• 1987

Bleeding from bone marrow after sternotomy for open cardiac surgery can be sometimes difficult to control and even lead to reoperation for hemostasis. A clinical comparative study was carried out to demonstrate the hemostatic effect of fibrin glue [Beriplast] for sternal marrow bleeding after sternotomy for open heart surgery. Postoperative blood loss was measured in two patient groups, group A included 19 patients operated upon from June to October 1987 and the fibrin glue was applied to the sternal marrow together with collagen fleece and group B consisted of 22 patients from January to May 1987 and only collagen fleece was applied without fibrin glue. There was no difference between two groups in age and sex distributions, coagulation state, method of extracorporeal circulation and operative management. The blood loss one hour after operation was 2.04 ml/hr/kg in group A and 3.55 ml/hr/kg in group B [P<0.001]. The most significant difference was observed during the first 4 hours after surgery with 1.34 ml/hr/kg versus 2.05 ml/hr/kg. over the following 20 hours the amount of drainage from the chest tubes was identical in both groups. Fibrin glue reduces blood loss after open heart surgery by local hemostasis at sternum. Our study has shown that local application of fibrin glue to sternal marrow is an effective method of controlling the sternal bleedings. No side effect or complication of fibrin glue was noted.

• Magazine of the Korean Society of Agricultural Engineers
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• v.14 no.2
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• pp.2593-2602
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• 1972

Plastic pipes Wrapped with synthetic filter are recently used for drainage or Collecting of Underground water. But it's use is possible only for small size of diameter less than 300mm, because large size plastic pipes are not readily availabe. For large diameter infiltration gallery, porous concrete pipes are now used, but it's heavy weight brings difficulties in making, moving and setting of the pipes. With it's conventional method of filter setting, fine sands are brought into the pipes to make trouble to lifting pumps and channels Therefore, initial construction cost and maintenance cost become high. To solve-this problem, new method is developed and tested. Small PVC pipes(diameter 14mm) are assembled at the site of construction to newly devised I beam type circls. The size of circular inpiltration gallery is optionally determined by I beam type circle which support small PVC pipes and is made of PVC amterial. This gallery are wrappd with syntheitc filter to prevent sand instruction. In this test, the diameter of 300, 400, 500mm were used. I beam type circles were made with PVC plated with thickness. t=6, 9, 12mm. Water quantity collected through the PVC circulor gallery are measured and the strengths of the gallery. 1. Allowable setting depth of gallery pipe below graund for the case of t=6mm, D=500mm is 2.72m. 2. Collected water quantity depends on soil texture, depth of water grandient of water surface, filter material angle of setting etc. 3. About 126% of water quantity collected from the one gallery pipe measured in two gallery pipes of two parallel installation.

• Journal of the Korean GEO-environmental Society
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• v.19 no.7
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• pp.13-18
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• 2018

Recently, road subsidence has been increasing in urban areas, threatening the safety of citizens. In the lower part of the road, various road facilities such as water supply and drainage pipelines and telecommunication facilities are buried, and the deterioration of the facilities causes the road subsidence. In particular, in the case of old sewer pipes which are attracting attention as a main cause of road subsidence, the management of sewer pipe replacement, repair and reinforcement is being performed depending on the burial year. Therefore, in this study, we tried to suggest a reliable road subsidence risk assessment method considering various sewer specifications and surrounding environment information and CCTV exploration result and GPR exploration result.

• Proceedings of the Korean Geotechical Society Conference
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• 2005.03a
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• pp.974-981
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• 2005

Because general laboratory tests for sand compaction pile method including unit-cell test device have fixed outside diameter, as area replacement ratio increase, diameter of sand pile increase. These condition can bring about overestimation of stiffness of composite ground. In addition, existing large soil box which consist of bellows type loading plate can occur serious mistake in checking the amount of drained water because there are additional drainage along the inside wall in device. Overcoming these shortcoming, this paper developed modified large scale soil box consist of piston type load plate. In this study, using this device, series of modified large scale soil box tests were performed, and investigated the settlement and stress transportation characteristics with area replacement ratio in sand compaction pile method.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.6 no.1
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• pp.79-86
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• 1986

The parameters of Nash's conceptual model of Instantaneous Unit Hydrograph, n and k, are estimated by the moment method from the rainfall and runoff data in 18 watersheds of drainage area ranging 53.7 to 1,361 sq. km. Then, these parameters are represented in terms of watershed characteristics by F-test and multiple correlation method. The unit hydrographs by this study are compared with the unitgraphs obtained from the recorded runoff data and agreements are good. The results imply that unit hydrographs in ungaged watersheds can be derived by watershed characteristics only through Nash's model.

• Proceedings of the SAREK Conference
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• 2009.06a
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• pp.491-496
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• 2009

Recently, the high-rise building has been constructed competitively because it is symbol of the national competitive power including the technical power. The higher buildings are getting, the more important building mechanical systems are. So, the building mechanical systems are getting developed. Among the building mechanical systems, the sanitary system is basically necessary in order to maintain the building hygienically along with convenience and safety. This study has been investigated for various cases of high-rise building plumbing system. As a result, a variety of zoning method has been applied to most skyscrapers depending on the building height in the building mechanical system. And a variety of joint have been applied to minimize the Shortening and Sway. Also, the drainage in same uses has been discharged outside of a build through the one vertical pipe line. And airing system has been used like Individual Vent Pipe Yoke Vent Pipe Stack Vent Pipe Loop Vent Pipe Relief Vent Pipe method. It is sure that this study could be used as the high-rise building design.

• Journal of Korean Physical Therapy Science
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• v.5 no.4
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• pp.831-836
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• 1998

Object: We evaluated the efficacy of chest physical therapy in pediatric patients with pneumonia. Method: Retrospective study was performed in 89 pneumonia patients admitted to pediatric unit. The subjects were divided into two groups: control group; treatment group. Control group included 42 patients who didn't receive chest physical therapy. Treatment group included 47 patients who received chest physical therapy. The chest physcial therapy employed were postural drainage, chest percussion, deep breathing training and enhancement of coughings. The efficacy was evaluated by x-ray outcome before discharge. Results: There were no significant difference in age, sex, type of pneumonia, and symptom duration between two groups. However the duration of fever after admission, duration of antibiotic use and hospital stay were longer in treatment group. In treatment group, longer the day to initiate chest physical therapy, longer the hospital stay. The final outcome was not different between groups. Conclusion: The results suggest that the referred patients for chest physical therapy tends to be of severe cases. Nevertheless, the result that the outcome was not different in two groups means that the chest physical therapy could be used as a effective treatment method in pediatric patient with pneumonia.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 1999.11b
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• pp.164-171
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• 1999

A new technique for recycling process water was developed in order to reduce the calcium hardness of the closed OCC recycling system. Calcium ions present in the white water were precipitated as calcium carbonate by a reaction with sodium carbonate and the CaCO$_3$precipitates were easily removed from the system by a dissolved air flotation(DAF) method. After the DAF stage, CO$_2$-gas was purged into the water because the pH of Na$_2$CO$_3$-treated white water was reduced to neutral by CO$_2$gas. Since CaCO$_3$precipitate tends to stick onto the fine fiber surface and then is selectively removed from the water, a proper amount of suspended solid in the process water acts as an important factor in deciding the removal efficiency. By the application of Na$_2$CO$_3$addition - DAF - CO$_2$purging to the short circulated white water the calcium hardness was significantly reduced by 92% and more. The removal of calcium ions with fine fibers led to drainage improvement, reduction of fresh water consumption, and enhanced efficiency of wet-end chemicals.

• Journal of Chest Surgery
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• v.28 no.1
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• pp.42-46
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• 1995

Vertical axillary muscle sparing thoracotomy is newly appeared and excellent alternative method of standard posterolateral thoracotomy.It has many advantages compared to standard posterolateral thoracotomy , less postoperative pain, well preserved thoracic muscle strength, full range of motion of the shoulder girdle and attractive cosmetic results. We performed vertical axillary muscle sparing thoracotomy in 36 patients from November 1993 to July 1994. The ages of the patients ranged from 6 months to 71 years[mean 45.1 years , and the patients consisted of 20 males and 16 females.The preoperative diagnosis were as follows : lung cancer in 17 patients, tbc destroyed lung in 7, bronchiectasis in 3, bullous emphysema in 3 and the others are mediastinal tumor, bronchogenic cyst, lung abscess, empyema, esophageal diverticulum, and CCAM [congenital cystic adenomatoid malformation . The operative procedures were as follows : lobectomy and bilobectomy in 16 patients, segmentectomy in 4, wedge resection in 3, penumonectomy in 7, and the others were open biopsy, lobectomy with diaphragm excision, sleeve right upper lobectomy, decortication, mediastinal mass excision, and esophageal diverticulectomy. We had 6 complications : postoperative bleeding in 2 cases, operative wound infection, arrrhythmia[atrial fibrillation , Horner`s syndrome, hoarseness. The subcutaneous seroma occurred in 4 cases but did not require drainage and relieved within 4 weeks spontaneously. We concluded that vertical axillary muscle sparing thoracotomy could be done in most of all thoracic surgery with safety. Comparing to standard posterolateral thoracotomy vertical axillary muscle sparing thoracotomy has many advantages such as less postoperative pain, well preserved muscle strengths and good cosmetic results.

• Water for future
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• v.14 no.3
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• pp.37-46
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• 1981

The purpose of this paper is to provide a method of estimating the magnitude and frequency of floods on five major streams in Korea such as the Han, the naktong, the Geum, the Seomjin and the Yeongsan. Derivation of the flood frequency formulae is based on the multiple correlation method. For each gaging station in the region, flood frequency curves are drawn by GumbelChow and Weibull plot. where 24 gaging stations are selected for this study. After the station flood-frequency cruves have been prepared, discharges are read at selected recurrence intervals. Each set of discharges is then correlated with basin parameters, using regression equation. The basin parameters that are considered include drainage area, length of main stream, shape facotr, mean basin slope and main channel slope.