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강연익,임종철,전미옥 釜山大學校 都市問題硏究所 1999 都市硏究報 Vol.7 No.-
선행재하공법은 압밀에 의해 침하를 발생시켜 구조물에 유해한 침하를 미리 끝나게 하여 잔류침하를 방지하고, 지반의 강도를 증가시켜서 구조물 기초지반의 전단파괴를 방지하는 목적으로 사용된다. 그러나 선행재하공법을 위한 성토시 연약지반의 강도가 대단히 약해서 재하 하중에 의해서 과도한 변형이 발생하게 되며, 특히 과도한 성토를 할 경우 활동파괴가 발생할 우려가 높다. 활동파괴를 미연에 방지하고 공기 단축의 목적으로 보강토 공법이 사용되고 있다. 보강토 공법은 성토체내에 보강재를 매설하여 시공함으로써 전단강도를 증가시켜 활동파괴에 대한 안전율을 높이는 것을 목적으로 한다. 일반적으로 보강재력은 극한 인발력에 일정한 안전율을 나누는 방식으로 구하고 있지만 이 값은 보강재력을 과대 평가하게 되어 불안전측 설계가 된다. 본 연구에서는 보강 성토시 적절한 보강재 위치를 결정하여 흙과 보강재의 상대변위에 의해 발생된 보강재력을 구하였다. 이는, 변위에 의해 발생한 보강재력을 사용함으로써 보다 정확한 인장력을 구할 수 있게 한 것이다. 그리고 이 값을 보강재에 의해 증가된 저항모멘트 항으로 고려하여 보강성토시의 안전율을 산정하였다. 본 연구에서 개발된 프로그램(REAP)은 연약지반상 성토설계시의 안성관리를 효율적으로 할 수 있게 하는데 목적이 있다. Preloading method is used to prevent structure from hurtful settlement of ground and to increase the strength of ground by consolidation. Then, the strength of soft clay ground is very low. So, the excessive displacements occur in this kind of soil layer during loading. Sometimes, this displacement will be able to make slope sliding of embankment. One of the method to prevent from failure and to decrease the construction period in embankment if earth reinforcing method. Reinforced embankment increases in shear strength of ground by tensile strength of geotextile which is installed in embankment. So, the safety of slope stability will increase by soil reinforcement. By using reinforced embankment analysis program (REAP), following facts can be obtained ① Determine location of geotextile. ② Calculate tensile strength of geotextile by displacement at an intersecting point of sliding surface. In ordinary method, the tensile strength of geotextile is obtained bγ dividing the ultimate tensile stress by safety factor. This method does not have enough safely, because the tensile strength of geotextile is overestimated. In this paper, tensile strength is calculated with respect to the content of displacement. ③ Calculate increment of resisting moment from tensile of geotextile. ④ Stability control of reinforced embankment.
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권장연,임영희,임미혜,류재숙,안명희,민득영 한양대학교 의과대학 1998 한양의대 학술지 Vol.18 No.2
The purification methods such as bead-beater destruction, trichloroacetic acid(TCA) precipitation and 3-[(3-cholamidopropyl) dimethylammonio]-1-propane sulfonate(CHAPS) solubilization of Trichomonas vaginalis antigens on sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) and enzyme-linked immunoelectrotransfer blotting (EITB) were evaluated. Total TCA-precipitated proteins and CHAPS-solubilized extract of T. vaginalis possessed common protein bands whose molecular weights were at 28 kDa, 35 kDa, 40 kDa, 50 kDa, 60 kDa, 100 kDa, 120 kDa, 130 kDa, and 160 kDa, and bead-beater treated trichomonal proteins represented some different spectrum of protein bands from TCA- or CHAPS-treated ones in that they didn't show high M.W. protein bands(〉100 kDa) on SDS-PAGE. But similar antigenic bands with the molecular weights of 60 kDa, 110 kDa, 120 kDa and 140 kDa by EITB were identified in TCA-, CHAPS- and bead-beater treated proteins. In conclusion, TCA-precipitation and CHAPS-solubilization were more stable methods to analyse trichomonal proteins than extraction with bead-beater, and the result will be useful for antigen analysis of Trichomonas vaginalis to elucidate a mechanism of pathogenesis in host-parasite relationship.
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부산시 사하구 주민들의 을숙도 주변 환경에 대한 인식도 조사
이상준,박미연 부산대학교 환경문제연구소 1994 環境硏究報 Vol.12 No.-
Over the past '70's, our country has carried out a series of economic development plans successfully. On the other hand, however, as side-effects of industrialization, it has caused so many problems, the most serious one of which is environmental pollution. Therefore, this study, considered the vital state of environmental pollution and the importance of environmental reservation today, is performed through the experimentation and questionaires to have a through grasp of the real environmental state around Eulsuk-do located in Hadan-dong, Saha-gu, Pusan and to make it more comfortable circumstance. The subjects are dwellers living around Eulsuk-do and its regional administrative officials. The result are as follows; 1. General Water Analysis This experiment was carried out to evaluate the water quality of Nagdong river around Eulsuk-do. Water samples were collected from 3 stations from December 1993 to February 1994 (see Fig. 1). Water temperature, pH, chloride ion, DO, BOD, COD, SS were observed to evaluate the water quality. The month average concentration of general items at each site was 8.3∼11.0(℃) in temperature, 6.70∼7.61 in pH, 0.05∼1.32(%) in ??, 9.1∼10.8(mg/l) in DO, 3.33∼7.00(mg/l) in BOD, 6.02∼21.04(mg/l) in COD, 18.0∼65.3(mg/l) in SS. 2. Survey Analysis They pointed out in the questionaires over the state of its natural environment that it is badly contaminated mainly by water pollution(Regional administrative officials : male 88.6%, female 90.5% ; Dwellers : male 94.6%, female 100%). In the question of living environment, they replied that air pollution, water pollution, noise, vibration and stinky small are seriously excessive, and that the remarkable fact of its living environment is that surrounding s of Eulsuk-do are changed into the resort for recreation. And they pointed out the social and cultural environment around Eulsuk-do is insecure, dirty uncomfortable and low-cultured.
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온산만의 퇴적물과 총알고둥(Littorina brevicula)내 중금속 분포
이인숙,박경숙,최병래,송미연 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-
To investigate the distribution of heavy metal concentrations in Onsan bay, concentrations of cadmium, copper, zinc and lead in surface sediments and the periwinkles (Littorina brevicula) were determined in February and July, 1996. The ranges of cadmium, copper, zinc, and lead concentrations in the surface sediments were 0.08∼3.72, 3∼307, 49∼1273 and 15∼399㎍/g dry weight, respectively. The decrease of concentration in heavy metals with distance from Daejeong stream indicated that this stream is the pollutant source of heavy metals in Onsan Bay. The concentrations of cadmium, copper, zinc and lead in L. brevicula were 0.11∼11.81, 21∼212, 30∼96 and 0.26∼4.12㎍/g dry weight in February and 1.01∼24.9, 66∼325.4, 54∼225 and 0.68∼8.41㎍/g dry weight in July, respectively. These concentrations in L. brevicula were the significantly different(p<0.001) with the season of sampling. However, overall distribution of concentrations of heavy metals in L. brevicula had very similar tendency that concentrations of heavy metal decreased with the distance from the pollutant source irrespective of the two seasons. Therefore, L.brevicula is considered as a useful indicator for heavy metals pollution. According to analysis of the organs, tissues such as the digestive gland, gill and viceral mussel accumulate high concentrations of heavy metals.
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문수연,최영실,박미연,이정아,정미경,정혜숙,정두련,송재훈,백경란 대한감염학회 2009 감염과 화학요법 Vol.41 No.3
Q fever is a zoonosis caused by Coxiella burnetii, Presenting as acute and chronic illness and it has been reported worldwide. Acute Q fever is usually asymptomatic or mild and self-limiting, but infective endocarditis is one of the most serious complications of chronic Q fever and can be fatal. Known risk factors for Q fever endocarditis are valvular heart disease, immunocompromised hosts, and pregnancy. There have been some reports on Q fever in Korea but there exists no report on Q fever endocarditis. We have experienced 2 cases of Q fever with underlying valvular heart disease; both Patients came to the hospital for evaluation of prolonged fever. Although Q fever and Q fever endocarditis are rare in Korea, Q fever endocarditis should be considered in the differential diagnosis of patient with infective endocarditis when causative microorganism cannot be identified.
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