免疫血淸學的 方法에 依한 姙産婦의 Toxoplasma 抗體價分布에 關한 調査硏究

韓炳錫,李英河,羅榮彦,辛大煥 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

In order to evaluate the Toxoplasma antibody titers, authors were examined sera of 117 pregnant women by enzyme-linked immunosorbent assay(ELISA), methlyene blue dye test and indirect latex agglutination test. The results were obtained as follows: 1. The ELISA values to the Toxoplasma antibody showed less than 0.200 in 2 cases(1.7%), 0.20 0-0.299 in 13 cases(11.1%), 0,300-0.399 in 29 cases(24.8%), 0.400-0.499 in 143 cases(12.0%), 0.500-0.599 in 26 cases(22.2%), 0.600-0.699 in 19 cases(16.2%), 0.700-0.799 in 6 cases(5.1%), 0.800-0.899 in 7 cases(6.0%), more than 0.900 in 1 case(0.9%), respectively. Regard to positive ELISA values were more the 0.800, positive rates of ELISA were 6.9%. 2. The dye test antibody titers showed less than 1:4 in 70 cases (59.8%), 1:4 in 27 cases(23.1%), 1:16 in 13 cases(11.1%), 1:64 in 6 cases(5.1%), and 1:256 in 1case(0.9%), respectively. Regard to 1:64 or more tilers of diluted sere were positive, the positive rates of dye test were 6.0%. 3. The Toxoplasma antibody titers by indirect latex agglutination test were less than 1:2 in 9 cases(7.7%), 1:2 in 47 cases(40.2%), 1:4 in 27 cases(23.1%), 1:8 in 21 cases(17.9%), 1:16 in 7 cases(6.0%), 1:32 in 5 cases(4.3%), and 1:64 in 1 cases(0.9%), respectively. Regard to 1:32 or more titers of diluted sera positive, the positive rates of indirect latex agglutination test were 5.2% 4. There were correlation between dye test antibody titers and ELISA values(correlation coefficient, r=0.414). The present study revealed that Toxoplasma antibody titers of pregnant women by various immunoserologic methods showed 5.1∼6.9%.

우리나라 목재수요의 장기예측에 관한 연구

이병일,김세빈,권용대 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.1

This study not only carried out to grasp about the summarized characteristics of the relationship between international timber market and production trend of wood products, but also focused on the analysis of korean wood demand and the long-term forecast with econometric analysis. The result of regression analysis for wood demand in Korea is that coniferous roundwood demand(CIWD) is explained by coniferous foreign roundwood price(CWRI), Gross domestic product(GDP), a dummy variable. Non-coniferous roundwood demand(NCIWD)is explained by non-coniferous roundwood price(NCWRI), coniferous roundwood price(CWRI), a dummy variable. As the result of long-term forecast by base case, the total roundwood demand was forecasted 11,107,000㎥ in the year 2000, 11,781,000㎥ in 2005, 12,565,000㎥ in 2010. As the result of scenario 1, total roundwood demand was forecasted 11,027,000㎥ in 2000, 11,435,000㎥ in 2005, 11,952,000㎥ in 2010. And as the result by scenario 2, total roundwood demand was forecasted 11,341,000㎥ in 2000, 12,208,000㎥ in 2005 13,257,000㎥ in 2010.

Siriraj Stroke Score 따른 뇌졸중 환자 감별의 적합성

유병대,이명갑,서영조,조준,박찬상,이동필 대한응급의학회 2000 대한응급의학회지 Vol.11 No.4

Background: The differentiation between hemorrhagic(HS) and norhemorrhagic(NHS) stroke is the most important first step in the management of acute stroke because clinical management of the two disorders differs substantially. Neuroimaging studies are useful in diagnosing and distinctioning between HS and NHS. The use of clinical variables, such as Siriraj stroke scores(SSS), has led to good sensitivity, specificity and predictive values. The aim of our study was to evaluate the use of the SSS in the Korean population and assess whether it could aid to expedite treatment decisions. Methods: We reviewed 111 cases of stroke patients admitted to our hospital via the emergency department over a 6 months period from July to December 1998. Levels of consciousness, vomiting, headache, and atheroma markers used in the SSS were applied to these patients who met the criteria for a stroke. Results: Of the 111 patients, the SSS classified 83 with sensitivities of 81.1%(NHS) and 73.3%(HS) and positive predictive values of 84.3% and 68.8%, respectively. The overall accuracy rate was 78.3%. Conclusion: Our results suggest that the SSS is not reliable in distinguishing stroke types in the Korean population. Definite neuroimaging studies are needed prior to thrombolytic therapy.

大災害리스크. 保險可能性, 相互性의 原理

정병대 한국보험학회 2002 保險學會誌 Vol.63 No.-

본 연구는 보험의 두 원리 가운데 상대적으로 경시되어 왔던 '상호성의 원리'가 대재해리스크에 대한 대응방법의 선택에 어떠한 의미를 갖는지 이론적으로 검토하고 전통적으로 보험가능성의 한계선상에 있는 것으로 간주되어 온 대재해리스크가 상호성의 원리에 따를 경우 상호보험 내지는 조건부보험(contingent insurance)의 형태의 보험이 되어야 함을 시사하고자 한다. 또한 본 연구는 최근 활발히 도입되고 있는 대재해조건부 파생증권과 상호성의 원리와의 관계를 설명하고 이러한 파생증권이 대재해리스크관리의 방향설정에 어떠한 시사를 주고 있는지 고찰하고 있다. 마지막으로 본 연구는 상호성의 원리가 제시하는 상호보험, 조건부보험, 대재해조건부증권 등이 반드시 전통적 보험을 부정하는 것은 아니며 전통적 보험은 여전히 시장의 불완전성과 보험산업의 상대적 효율성을 기초로 상호성의 원리가 시사하는 바를 적극적으로 수용함으로써 성장 발전할 수 있음을 주장하고자 한다. This study examines optimal catastrophic risk management applying the principle of mutuality developed by the late Karl Borch. The study will show that according to the principle of mutuality, highly correlated risks such as catastrophic risks must be insured with mutual insurance and/or contingent insurance both of which depend on the aggregate loss state. And also it will be suggested that catastrophe risk derivatives and catastrophe contingent securities are necessary instruments to hedge such risks because of relative inefficiency of traditional insurance in dealing with contingent and mutual insurances. The study also suggests that although it is difficult for traditional insurers to swallow the principle of mutuality in its entirety, it is still possible to incorporate mutuality into the traditional insurance products. Also traditional insurers might benefits from the fast expansion of catastrophe securities market by actively participating in it or taking advantage of their know-how and efficiency in dealing with risks and markets.

SCM415강의 침탄 표면처리 공정과 기계적 성질

김대욱,김문진,임병수 成均館大學校 科學技術硏究所 1998 論文集 Vol.49 No.2

The influence of plasma carburizing process on the surface hardness of SCM415 low-alloy steel (0.15% C) was investigated under the various process conditions of gas composition, gas pressure, plasma current density, temperature and time. The effective case depth was found to depend on the amount of methan gas containing carbon, thus the deepest case depth and the uniformity of hardeness were obtained under the 100% methan gas condition. The case depth increased with the higher plasma current density which could be increased in the higher gas pressure, because the surface carbon content depends on plasma current density. The effective plasma carburizing temperature of SCM415 steel was found to be higher than 850℃, and the case depth was proportional to the square root of carburizing time under the same current density. The bending fatigue strength of plasma carburized specimen is higher than those of as-received specimen and reheat-quenched specimen. High cycle fatigue and dry wear characteristics of vacuum carburized low alloy steel, SCM415(0.15% C), were evaluated after various heat treatments including direct quenching, single reheat quenching and sub-zero treatment. Comparing the fatigue and wear characteristics of carburized specimens to those of hot annealed or reheat quenched specimens, the wear resistant property as well as bending fatigue limits of vacuum carburized steels were substantially superior to other heat treated steels. Test results indicated that the carburized and reheat treated specimens have higher fatigue limits than the carburized and direct-quenched specimens and the specimens followed by sub-zero treatment. The wear volumes of sub-zero treated specimens with higher surface hardness show slightly lower values than those of non sub-zero treated specimens. This is attributed to the reduction of retained austenite amount of the surface and an increase of surface hardness by the sub-zero treatment effect.

광펌핑된 루비듐 원자의 원형 편광 분광

박종대,권병국 培材大學校 1997 培材論叢 Vol.2 No.-

반도체 레이저의 주파수를 절대적으로 안정화시키기 위하여 루비듐 원자의 흡수선을 이용하였다. 이를 위해 두 개의 서로 수직인 편광자 안에 류비듐 셀을 설치하고, 광펌핑으로 루비듐 원자에 원형 복굴절을 유도하였다. 반도체 레이저에서 나온 레이저 빔이 이 셀을 통과하여 되먹임 되도록하여 광학적으로 반도체 레이저의 주파수를 안정화 시켰다. Absorption spectrum of Rubidium atoms was utilized to stabilize the oscillation frequency of a semiconductor laser. A Rubidium cell was installed between crossed polarizers and circular birefringence was induced by optical pumping. The frequency of a semiconductor laser was stabilized by optical feedback of transmitted laser beam through the optically pumped cell.

Allium속 식물에 함유된 함황화합물의 화학적 성상과 안정성

최병대 國立統營水産專門大學 附設 水産科學硏究所 1994 수산과학연구소보고 Vol.5 No.-

나프타분해플랜트의 부탄추출공정에서 부탄증기의 연속누출에 의한 화재사고의 영향평가

윤대건,이헌창,함병호,조지훈,김태옥 韓國火災 ·消防學會 1998 한국화재소방학회논문지 Vol.10 No.4

나프타분해플랜트의 부탄추출공정에서 부탄증기의 연속 누출에 의한 제트화재와 플래쉬화재의 사고결과에 대한 영향을 평가하고 사고결과에 미치는 공정변수들의 영향을 해석하였다. 877 kPa과 346.75K의 공정조건에서 부탄증기가 87.8 kg/s의 속도로 8m의 높이에서 연속누출되는 경우에 표준조건으로 설정한 대기 및 환경조건에서 사고결과를 해석한 결과, 제트화재에서는 화염의 형태와 크기를 예측할 수 있었으며 누출지점으로부터 200m에서 API모델로 산출한 목사열은 약 5kW/m^2이었고 플래쉬화재가 일어날 수 있는 연소범위는 11.2~120.2m이었다. 그리고 사고결과에 미치는 조업압력의 영향은 조업온도보다 크며 압력이 증가할수록 사고결과 값이 증가하였다. 이때 플래쉬화재에서 X_UFL에 미치는 공정압력의 영향은 X_LFL에서보다 약 1/10이하를 나타내었다. The consequence analysis for jet and flash fire accidents by the continuous release of butane vapor was performed and effects of process variables on consequences were analyzed in standard conditions. For the continuous release(87.8 kg/s) of butane vapor at 8 m elevated height in the debutanizing process of the naphtha cracking plant operating at 877 kPa, 346.75 K, we found that for the jet fire accident, shape and size of the flame could be predicted and thermal radiation estimated by API model at 200 m distance from release point was 1.5 kW/m^2, and that for the flash fire accident, effect range was 11.2~120.2m. Also, simulation results showed that effects of operating pressures on consequences were large than those of operating temperatures and results of accidents were increased with increasing operating pressures. At this time, effects of operating pressures on X_UFL. were smaller

밤의 유통마진 및 유통체계에 관한 연구

김병택,김의경,정병헌,김대현 慶尙大學校 地域開發硏究所 1999 地域開發硏究 - 慶尙大學校 地域開發硏究所 Vol.10 No.-

호염세균으로부터 추출한 카로테노이드 색소의 안정성

정영기,최병대 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1

A carotenoid pigment, which was a determinant for food quality, was extracted from a marine halophilic bacteria. The stability of the pigment extract was investigated for a food additive. The optimum temperature for stability was 20℃. The pigment degradation was significantly affected by solvent polarity, however, stable in salvent methanol and ethanol. The pigment degradation was highly sensitive to light and UV exposure.