• Structural Monitoring and Maintenance
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• v.6 no.4
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• pp.347-364
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• 2019

Two seismic response data from the CSMIP strong motion instrumentation of Pacoima dam are selected: San Fernando earthquake (Jan 13, 2001; ML=4.3) and Newhall earthquake (Sept. 1, 2011; ML=4.2), for the identification of the dam system. To consider the spatially nonuniform input ground motion along the dam abutment, the subspace identification technique with multiple-input and multiple-output is used to extract the dynamic behavior of the dam-reservoir interaction system. It is observed that the dam-reservoir interaction is significant from the identification of San Fernando earthquake data. The influence of added mass (from the reservoir) during strong ground motion will create a tuned-mass damper phenomenon on the dam body. The fundamental frequency of the dam will be tuned to two different frequencies but with the same mode shapes. As for the small earthquake event, the dam-reservoir interaction is insignificant.

• Journal of Environmental Health Sciences
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• v.26 no.4
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• pp.105-109
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• 2000

The purpose of this study is to investigate on the water quality of the upper region of Wonchun stream located in Suwon city by chemical analysis and EROD-microbioassay methods using rat hepatoma cell line H4IIE. The water samples were collected at 6 sampling sites from sept. to Nov. 1999 and determined the quantitative toxic effects. Higher levels of BO $D_{5}$, CO $D_{Cr}$ and CO $D_{Mn}$ were determined at M6 site where the influent contains domestic and industrial wastewater. EROD activity of water samples was ranged from 3.43$\pm$0.08 to 9.05$\pm$0.10 pmol/mg protein/min. High correlation with EROD activities and COD values was observed. From the results, the upper region of Wonchun stream water area was presumed to be highly polluted with various persistent organic chemicals.s.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.11 no.1
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• pp.69-77
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• 1989

This is a retrospective study on 219 patients with mandibular fracture. The patients were treated in the Dept. of Oral Maxillofacial Surgery of WON KWANG UNIV. HOSPITAL from Aug. 1, 1984 to Sept. 30. 1988. The results were as follows. 1. The mandibular fractures occured most frequently in the twenties(35%) and male were predominant (74.7%) than females. 2. The most frequent etiologic factor was traffic accident(34.3%). 3. The most common location of fracture was symphysis(37.1%). And angle(27.6%), condyle(25.7%), ramus(1.6%) were next in order of frequency. 4. In mandible fracture, they have an average 1.8 fracture line. 5. The use of plate & screw system were more increased in the comparison of each year. 6. Intermaxillary fixation period was more reduced from the concept of 6 weeks fixation, due to the use of Plate & screw system. 7. Postoperative acute wound infection was developed 9.6% in 219 mandibular fracture patients. The compression osteosynthesis was most common cause of acute wound infection than any other treatment method. 8. Postoperative malocclusion was developed 4% in 219 mandibular fracture. And the compression osteosynthesis was most common cause of malocclusion. 9. Acute wound infection was detailed by the approach method. The Intraoral & extraoral combination method was most common cause on acute infection and intraoral, extraoral approach method was next in order of frequency. 10. Normal mouth opening process was proportioned to IMF period. The short IMF period have a fast normal mouth opening process.

• Journal of Astronomy and Space Sciences
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• v.6 no.1
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• pp.57-72
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• 1989

A total of 80 photographs on 29 nights and another total of 44(22 each in B and V) photoelectric observations on 6 nights are secured for P/Halley(1982 ⅰ) for seven months before and after the perihelion passage. The photographic observations have been mode at different places depending on the position of the comet and the development of the tail, while the photoelectric observations were made only with 61-cm reflector at Yonsei University Observatory(YUO). Four most representative photographs are presented only to illustrate the remarkable features of the comet. The second one of these shows a coma with a possible flash activity on 1985 SEPT. 18.56 UT. The third one shows the largest tail recorded among our plates, and the last one prepresents unusual record made on northern hemisphere at a latitude as high as about $33^{circ}$12' N on the occasion of the comet's second perigee on 1976 APR. 11.6 UT. Photoelectric observations, on the other hand, determine the V and B-V of the total and the coma of the comet before its perihelion passage, and exhibit the light variations of 0m.6 in V in an hour and a half. Two new sets of m and n, one before and the other after the perihelion passage, determined based on the collected data, but the values are dissimilar one another significantly.

• The Korean Journal of Pharmacology
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• v.16 no.2 s.27
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• pp.71-75
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• 1980

A total of 30 cases of gynecological infection were treated with Cefoperazone at the Department of Ob-Gy, Seoul Baik Hospital, Seoul, Korea from Sept. 1979 to Aug. 1980. Cefoperazone sodium was administered in a dose of 2g/day intramusculary or intravenously for 6 to 13 days. The effective rates of Cefoperazone based on clinical and bacteriological response were 100% in 9 cases of acute non-gonorrheal PID, 5 cases of postpartum endometritis, 2 cases of recurrent non-gonorrheal PID and 80% in acute gonorrheal PID(8 out of 10 cases). A case of recurrent gonorrheal PID and 2 out of 3 cases of postoperative infection responded also satisfactorily to Cefoperazone treatment. There were no drug-related abnormal findings in urinalysis, hematology and blood chemistry. Any particular side effects, except for one case of fever and rash which disappeared spontaneously without any treatment or discontinuation of the drug, were not noted during or after the treatment.

• Journal of the Speleological Society of Korea
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• v.1 no.1
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• pp.17-22
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• 1975

The Kosudong-gul Cave at kosu-ri, Daegang-myon, Danyang-gun, Chung Chong Bug-do, Province was surveryed by this author on the 3rd of Nov. 1973, 6th of Jan. 1974, 30th of Aug. and 13th of Sept. 1975 through over several times field trips. Yoechon-gul Cave at Yoechon-ri, Gagok-myon, Danyang-gun, Chung Chong Bug-do, Province was surveyed by this author on the 30th of August, 1975. The enviromental factors of both caves checked the siftations for air temperature, water temperature, moisture and pH, as well as the faunae f both caves and ecollogically studieel them. Kosudong-gul Cave (1) The environmental factors checked was the same as table 1. (2) The fauna is 5 classes and 18 species and they classified as Troglobite......2 species-11.1％, troglophile.....5 species-27.7％, and trogloxene....11 species.-61.2％. Yochon-gul Cave (1)The environmental factor Checked was the same as table 2. (2) The fauna is 5 classes and 8 species and they classified as troglobite......1 species-11.1％, troglobite....4 species-44.4％ and trogloxene.....4 species-44.4%.

• Journal of Chest Surgery
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• v.25 no.6
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• pp.593-597
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• 1992

The bronchopleural fistula[BPF] due to bronchial stump disruption after pneumonec-tomy has remained one of the most dreadful complications to now. The management of the BPF with empyema thoracis are still therapeutic dilemma even though a various surgical methods for the control of BPF with or without empyema thoracis. We have experienced the successful treatment of BPF & empyema thoracis with transsternal transpericardial approach. The patient was a 54 years old male who was taken left pneumonectomy at W. Medical Center at sept, 19th. 1991. He was suffered from the BPF R empyema thoracis and so was transferred to our hospital at Nov. 19th. 1991. We treated the patient with transsternal transpericardial bronchial closure for BPF, and put clagett procedure for empyema thoracis in 2 weeks. We think this kind of surgical techniques is one of the relatively simple and effective method for the control of BPF and empyema thoracis.

• Journal of Oral Medicine and Pain
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• v.7 no.1
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• pp.27-31
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• 1982

This study was undertaken in order to get biomorphometric significance of oral candidiasis as a diagnostic method. Specimen was collected from 23 oral candidiasis outpatients(10 male and 13 female) of dental infirmary of U.C.L.A. Health Center from Sept. 1,1981 to Aug. 1,1982. The results were as follows : 1. The male-female ratio on oral candidiasis was 5/6.5. 2. The mean age of male was 42.8 and the mean age of female was 60.1. 3. The nucleocytoplasmic ratio of outmost epithelial cell layer was 0.60 ane (the nuclecytoplasmic ratio of)basal cell layer was 0.87. The difference was significant.

• Journal of ILASS-Korea
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• v.21 no.4
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• pp.207-213
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• 2016

To protect air pollution of urban area from motor vehicles, emission limits for diesel vehicles have been dramatically lowered in short period. But recent studies have shown that on-road NOx emissions of light-duty diesel vehicles are considerably higher than the values measured with laboratory test procedures used for emission certification. To tackle with this issue, Ministry of Environment have a plan to introduce EU RDE-LDV (Real-driving Emission-Light-duty Vehicle) regulation. In this study, 4 Euro 6 diesel vehicles have been tested with the new test procedures published by EU to estimate on-road NOx emissions using PEMS (Portable Emission Measurement System). The results have shown that the requirements of EU RDE-LDV could be met in driving condition of metropolitan area for constitution of test routes and validity of test results. In analysing with Moving Averaging Window method the completeness and normality of test data were validated with the requirement. On-road NOx emissions were quite deviated as test vehicles and higher than the new limit of on-road NOx emission enforced from Sept. 2017, which means that RDE-LDV can effectively reduce NOx emission of diesel vehicles in real driving conditions of Korea.

• Journal of Chest Surgery
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• v.15 no.3
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• pp.278-284
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• 1982

As of today, the frequency of primary lung cancer is one of the improved problems in modern medicine and is increasing rapidly year by year. This study dealed with 138 cases of primary lung cancer proved by histopathologic examination in Thoracic & Card iovascular Surgery Dept. of N.M.C. from Sept. 1966 through June 1981. The majority of patients belong to 5th and 6th decade. Ratio between male and female was 3.7: 1. Initial symptoms were cough, blood tinged sputum, hemoptysis, chest pain, dyspnea and duration of symptoms before admission was within 6 months [60%] and 12 months [78%]. Histopathologically, 64 cases [61%] of them were the squamous cell carcinoma, 21 cases [15%] were the adenocarcinoma, 20 cases [14.8%] were the anaplastic carcinoma. Fifty-six cases were resectable: 43 cases were subjected to pneumonectomy and 13 cases were to lobectomy. The remaining 82 cases were nonresectable, but exploratory thoracotomy was performed in 22 cases of them. Among 56 resected cases, 33 cases were radically operated and 17 cases were subjected to palliative operation and 6 cases were subjected to extended operation. [Concomitant pericardium resection in 1 case and concomitant chest wall resection in 5 cases]. Surgical mortality was 10.7% and causes of death were aspiration of contralateral lung, respiratory insufficiency, postop. empyema with B.P.F, cardiogenic failure. This study analysed the cancer stage between preop clinical T.N.M. stage and postop. T.N.M. stage in 78 cases; resectable 56 cases and non-resectable 22 cases.