Poly(vinyl pyridine)을 포함한 Diblock Copolymers의 상거동에 관한 연구

Maste

(A) parameter study of continuum breakdown on a coupled CFD/DSMC method for simulations of transition regime flows

학위논문(석사) - 한국과학기술원 : 항공우주공학과, 2021.2,[iii, 56 p. :]중/고고도에서 고속으로 비행하는 물체는 연속체 영역과 희박기체 영역이 공존하는 천이 영역이라는 환경에 직면하게 된다. 이러한 환경은 일반적인 연속체 영역에서와는 달리 매우 복잡한 물리적 현상을 수반하며, 일반적인 연속체 유동 해석에 사용되는 전산유체역학 기법만으로는 이 영역의 유동을 해석하는 데 한계가 있다. 이를 해결하기 위해 난수를 사용하는 표본 추출기법인 Monte Carlo 방법으로 분자의 운동을 직접 모사하는 직접모사법(Direct Simulation Monte Carlo, DSMC)이 희박기체 영역의 지배방정식인 Boltzmann 방정식의 해석 기법으로서 일반적으로 사용되고 있다. 그러나 DSMC 기법으로 천이 영역의 유동을 해석할 때, 천이 영역의 연속체 영역에서 해석을 수행하는데 시간이 오래 걸리는 단점이 있다. 수치계산 정확도 및 효율성을 고려하여 이러한 한계들을 보완한 Navier‒Stokes 방정식 해석 기법과 DSMC 기법의 혼합 유동 해석기법이 사용되고 있다. 혼합유동해석 기법을 적용하기 위해서는 해석 영역을 연속체 영역과 희박 기체 영역으로 분할되어야 하며, 이를 위해 연속체 단절 매개변수가 사용된다. 극초음속 천이 영역의 물체 주위 유동에 대해서 구배 국부 길이 기반의 누센수가 연속체 단절 매개 변수로 널리 사용되고 있다. 본연구에서는 극초음속 천이 영역에 고밀도 유동이 유입되는 환경에 대해서 CFD, DSMC, CFD/DSMC 혼합해석의 결과를 비교하여 구배 국부 길이 기반 누센수가 극초음속 천이 영역으로 분사되는 고밀도 제트에 대해서도 적절한 연속체 단절 매개변수임을 확인하였다.한국과학기술원 :항공우주공학과

Phase Behavior and Morphology of Binary Blend of Block Copolymers having Hydrogen Bonding

DoctorBlock copolymer blends have been extensively investigated to control nanostructures. We employed two types of block components of poly(vinyl pyridine) (PVP) and poly(4-hydroxy styrene) (PHS). Due to the nitrogen atom in PVP and the hydroxy group in PHS group, the hydrogen bonding exists and this bonding could significantly change the phase behavior of binary blends of block copolymers containing hydrogen bonding. In this study, we investigated the phase behavior of binary blends consisting of high molecular weight polystyrene-block-poly(2-vinyl pyridine) copolymer (PS-b-P2VP) and low molecular weight PS-b-PHS by using small angle X-ray scattering and transmission electron microscopy. First experiment, we employed both PS-b-P2VP and PS-b-PHS exhibiting lamellar microdomain over the entire experimental temperatures up to 300oC. When the weight fraction of PS-b-PHS in the blend was less than 0.1, the lamellar microdomains were maintained. However, with increasing amount of PS-b-PHS, the microdomains in the blends were transformed to hexagonally-packed (HEX) cylindrical microdomains, and body-centered cubic spherical (BCC) microdomains. On the other hand, when a relatively high molecular weight of PS-b-PHS was used, the BCC spherical microdomains were not observed even at a large weight fraction of PS-b-PHS in the blend, but HEX cylindrical microdomains were formed. The phase behaviors observed experimentally were rationalized by the results of the self-consistent mean field theory. Secondly, we investigated the phase behavior of binary blends consisting of high molecular weight PS-b-P2VP and low molecular weight PS-b-PHS whose the microdomains are the BCC spherical microdomains of P2VP (or PHS). When the weight fraction of PS-b-PHS in the blend was less than 0.1, the BCC spherical microdomains were maintained. However, with increasing amount of PS-b-PHS, the microdomains in the blends were transformed to HEX cylindrical, lamellar, and finally returned to HEX cylindrical microdomains. On the other hand, when a relatively high molecular weight of PS-b-PHS was used, the lamellar microdomains were maintained even at a large weight fraction of PS-b-PHS in the blend. Very interestingly, we found highly asymmetric lamellar microdomains, despite of blends of highly asymmetric block copolymers with same volume fraction (ΦPS~0.83), not the complementary fraction. The phase behavior which observed experimentally in this study was rationalized by the results of the strong stretching theory

주유동 방향에 수직으로 분사되는 제트의 직접 수치해석

학위논문(석사)--서울대학교 대학원 :기계공학과,1997.Maste

새로운 수동제어소자인 공동을 이용한 마찰력과 열전달 감소에 관한 연구

Thesis (doctoral)--서울대학교 대학원 :기계항공공학부,2002.Docto

Studies on the reactional states of leprosy

의학과/박사[한글] Studies on Reactional States of Leprosy Sung-Hyun Han, M.D. Department of Microbiology Graduate School, Yonsei, University (Directed by Professor Joon Lew, M.D., Ph.D.) The occurrence of reactional states of leprosy in the course of the disease has long been recognized(Danielssen and Boeck, 1848; Hansen and Looft, 1895). Reactionla states are defined by Cochrane(1964) as "more or less sudden tissue responses, resulting from the liberation of bacilli, or their products, into the tissue, the manifestation of which can either be local or systemic". It is well known that the reactional states of leprosy are the most distressing complications of the disease, and that if reactional states intervene and continue to persist it 1) results in suffering of the patient and even death, 2) obstructs the continuance of antileprosy treatment and 3) tends to induce visceral amyloidosis. At Madrid Congress 91953 a) the official classification of reactional states of leprosy into 3 main reactional phases 〔i.e., reactional lepromatous leprosy, reactional tuberculoid leprosy and reactional (dimorphous) leprosy〕 was made. Since then various methods of classification of reactional states have been proposed by workers, and these have resulted in confusing classification of reactional states. The exact cause (or causes) or the pathogenesis of reactional states of leprosy is still unknown, but it is generally accepted that the reactional states of leprosy arise from antigen-antibody reactions, and many theories and hypotheses have been advocated by leprologists, such as allergy, disturbance of the immunological equilibrium, autoimmune phenomenon, general adaptation syndrome of Style and etc. Though little is known about the pathogenesis of the reactional states of leprosy, it is generally agreed that a reliable method of prevention or control would not only simplify and shorten the period of treatment but would also save much suffering and remove and important cause of deformity in leprosy. Report of the Panel on Leprosy Reaction (1964) recommended that rational therapy should be designed primarily to eliminate or interfere with the constant or repeated action of the determining or 'trigger' causes, and likewise, be conditioned in each case to the severity of the reactional episodcs. Basic general treatment intended to central systemic symptoms, and symptomatic treatment designed to act on the acute, focal or regional manifestations, are general practices in the treatment of reactional states of leprosy. In addition, specific treatment of leprosy is maintained, reduced or stopped according to the severity of the reactional states. At present, the total number of leprosy cases in Korea is estimated to be about 60,000(Kim, 1969), and records indicate that DDS has been brought into therapeutic use in Korea since 1955. However, no single result of the studies on reactional states has been reported in Korea. In this study, a series of study i.e., clinical epidemiology of reactions, classification, skin bacteriology and leprosy reaction, and treatment, were carried out in order to define the reactional states of leprosy in Korea, to give some light on the pathogenesis of reactional states in lepromatous leprosy and to evaluate overall efficacy of the treatment of leprosy reactions. Materials and Methods A. Patients: 1. Out of 1,911 leprosy patients who had registered and had been treated with DDS at he World Vision Leprosy Research and Treatment Center, 207 cases of leprosy reaction were included in the study. The type of the disease was classified according to the method resolved at the Madrid Congress(1953b). As skin tests, lepromin and tuberculin tests, were conducted. 2. Bacteriological examination of skin smears was made by the skin scraping method, and the Bacterial Index(B.I.) and the S.F.G. value were calculated by Ridley's method(1964a, 1964b). 3. Total serum protein was determined by the biuret method, and the serum was fractionated by paper electrophoresis and the reading was made with Spinco Analytrol. Mucoprotein was fractionated by paper electrophoresis and total mucoprotein determination was made. B. Clinical epidemiology of reactional states of leprosy: Some important aspects in clinical epidemiology of reactional states of leprosy were studied in regard to 1) the type of disease and leprosy reactions, 2) duration between onset of the disease and occurrence of leprosy reaction, 30 duration between initiation of DDS treatment and occurrence of leprosy reactions and 4) frequency of occurrence of leprosy reactions and duration of reactional states. C. Skin bacteriology and leprosy reactions: Relationships between changes in skin bacteriology and the occurrence of reactional states in lepromatous leprosy were investigated through 1) Bacterial Index at registration and leprosy reaction, and 2) changes in B.I. and S.F.G. values following DDS treatment and leprosy reaction. D.Treatment of leprosy reactions and its evaluation: The cases of reactional states were treated with 1) steroids, 2) antipyretics and analgesics, 3) hypnotics and tranquilizers, 4) antileprosy drugs other than DDS, 5) miscellaneous drugs and 6) blood transfusion in single of combined medication. Over-all efficacy of the treatment of leprosy reactions was also evaluated. Blood transfusions were carried out on 26 patients who were reaction-prone and resistant to other treatment. As a pilot study to elucidate the mechanism involved in the treatment of the reactions by blood transfusion, the total serum protein, serum fractionation and AG ratio were determined before and afer the blood transfusion. Results and Summary 1) Based on the clinical epidemiology data of 207 leprosy reaction cases, the reactional states of leprosy were classified into 5 groups for simplicity and precticality: (1) erythema nodosum leprosum, (2) acute infiltration and exacebation, (3) neuritis alone, (4) reactive tuberculoid, and (5) transitional group. 2) Prior to the occurrence of reactional states, it was observed in lepromatous leprosy that a drastic change in S.F.G occurred following the initiation of DDS treatment. However, B.I. did not show a parallel decline and resulted in plateau formation through the course of antileprosy treatment. With the disappearance of reactional states in reaction-prone patients, there was observed a concomitant decline of B.I. which was in plateau state during previous reactional states. 3) Treatment of leprosy reactions which steroids, antipyretics and analgesics, hypnotics and tranquilizers, antileprosy drugs other than DDS, other miscellaneous drugs and blood trasnfusion, singly or in combination, resulted in an over-all 80% relief of reactional states. 4) The efficacy of blood transfusion in the treatment of leprosy reaction was outstanding as compared to other remedies included in this study. A pilot study to elucidate the mechanism involved in the efficacy of blood transfusions revealed that there occurred decreases in total serum protein and gammaglobulin, increases in albumin, and tendency toward normalization in the A/G ratio and other serum fractions following blood transfusion. [영문] The occurrence of reactional states of leprosy in the course of the disease has long been recognized(Danielssen and Boeck, 1848; Hansen and Looft, 1895). Reactionla states are defined by Cochrane(1964) as "more or less sudden tissue responses, resulting from the liberation of bacilli, or their products, into the tissue, the manifestation of which can either be local or systemic". It is well known that the reactional states of leprosy are the most distressing complications of the disease, and that if reactional states intervene and continue to persist it 1) results in suffering of the patient and even death, 2) obstructs the continuance of antileprosy treatment and 3) tends to induce visceral amyloidosis. At Madrid Congress 91953 a) the official classification of reactional states of leprosy into 3 main reactional phases 〔i.e., reactional lepromatous leprosy, reactional tuberculoid leprosy and reactional (dimorphous) leprosy〕 was made. Since then various methods of classification of reactional states have been proposed by workers, and these have resulted in confusing classification of reactional states. The exact cause (or causes) or the pathogenesis of reactional states of leprosy is still unknown, but it is generally accepted that the reactional states of leprosy arise from antigen-antibody reactions, and many theories and hypotheses have been advocated by leprologists, such as allergy, disturbance of the immunological equilibrium, autoimmune phenomenon, general adaptation syndrome of Style and etc. Though little is known about the pathogenesis of the reactional states of leprosy, it is generally agreed that a reliable method of prevention or control would not only simplify and shorten the period of treatment but would also save much suffering and remove and important cause of deformity in leprosy. Report of the Panel on Leprosy Reaction (1964) recommended that rational therapy should be designed primarily to eliminate or interfere with the constant or repeated action of the determining or 'trigger' causes, and likewise, be conditioned in each case to the severity of the reactional episodcs. Basic general treatment intended to central systemic symptoms, and symptomatic treatment designed to act on the acute, focal or regional manifestations, are general practices in the treatment of reactional states of leprosy. In addition, specific treatment of leprosy is maintained, reduced or stopped according to the severity of the reactional states. At present, the total number of leprosy cases in Korea is estimated to be about 60,000(Kim, 1969), and records indicate that DDS has been brought into therapeutic use in Korea since 1955. However, no single result of the studies on reactional states has been reported in Korea. In this study, a series of study i.e., clinical epidemiology of reactions, classification, skin bacteriology and leprosy reaction, and treatment, were carried out in order to define the reactional states of leprosy in Korea, to give some light on the pathogenesis of reactional states in lepromatous leprosy and to evaluate overall efficacy of the treatment of leprosy reactions. Materials and Methods A. Patients: 1. Out of 1,911 leprosy patients who had registered and had been treated with DDS at he World Vision Leprosy Research and Treatment Center, 207 cases of leprosy reaction were included in the study. The type of the disease was classified according to the method resolved at the Madrid Congress(1953b). As skin tests, lepromin and tuberculin tests, were conducted. 2. Bacteriological examination of skin smears was made by the skin scraping method, and the Bacterial Index(B.I.) and the S.F.G. value were calculated by Ridley's method(1964a, 1964b). 3. Total serum protein was determined by the biuret method, and the serum was fractionated by paper electrophoresis and the reading was made with Spinco Analytrol. Mucoprotein was fractionated by paper electrophoresis and total mucoprotein determination was made. B. Clinical epidemiology of reactional states of leprosy: Some important aspects in clinical epidemiology of reactional states of leprosy were studied in regard to 1) the type of disease and leprosy reactions, 2) duration between onset of the disease and occurrence of leprosy reaction, 30 duration between initiation of DDS treatment and occurrence of leprosy reactions and 4) frequency of occurrence of leprosy reactions and duration of reactional states. C. Skin bacteriology and leprosy reactions: Relationships between changes in skin bacteriology and the occurrence of reactional states in lepromatous leprosy were investigated through 1) Bacterial Index at registration and leprosy reaction, and 2) changes in B.I. and S.F.G. values following DDS treatment and leprosy reaction. D.Treatment of leprosy reactions and its evaluation: The cases of reactional states were treated with 1) steroids, 2) antipyretics and analgesics, 3) hypnotics and tranquilizers, 4) antileprosy drugs other than DDS, 5) miscellaneous drugs and 6) blood transfusion in single of combined medication. Over-all efficacy of the treatment of leprosy reactions was also evaluated. Blood transfusions were carried out on 26 patients who were reaction-prone and resistant to other treatment. As a pilot study to elucidate the mechanism involved in the treatment of the reactions by blood transfusion, the total serum protein, serum fractionation and AG ratio were determined before and afer the blood transfusion. Results and Summary 1) Based on the clinical epidemiology data of 207 leprosy reaction cases, the reactional states of leprosy were classified into 5 groups for simplicity and precticality: (1) erythema nodosum leprosum, (2) acute infiltration and exacebation, (3) neuritis alone, (4) reactive tuberculoid, and (5) transitional group. 2) Prior to the occurrence of reactional states, it was observed in lepromatous leprosy that a drastic change in S.F.G occurred following the initiation of DDS treatment. However, B.I. did not show a parallel decline and resulted in plateau formation through the course of antileprosy treatment. With the disappearance of reactional states in reaction-prone patients, there was observed a concomitant decline of B.I. which was in plateau state during previous reactional states. 3) Treatment of leprosy reactions which steroids, antipyretics and analgesics, hypnotics and tranquilizers, antileprosy drugs other than DDS, other miscellaneous drugs and blood trasnfusion, singly or in combination, resulted in an over-all 80% relief of reactional states. 4) The efficacy of blood transfusion in the treatment of leprosy reaction was outstanding as compared to other remedies included in this study. A pilot study to elucidate the mechanism involved in the efficacy of blood transfusions revealed that there occurred decreases in total serum protein and gammaglobulin, increases in albumin, and tendency toward normalization in the A/G ratio and other serum fractions following blood transfusion.restrictio

Recent trends of fetal and infant death rates and their determinants in korea.

보건학과/박사[한글] 한국의 태아 및 영아사망률의 변화와 이들 사망의 결정요인을 파악하기 위하여 한국인구보건연구원에서 실시할 "1988년 전국 출산력 및 가족보건조사" 자료를 이용하여 분석하였다. 이 조사의 임신력자료에서 1974년 이후 발생한 모든 임신 흑은 출생을 분석단위로 하여 연도별 태아, 주산기 및 영아사망률을 계산한 결과와 비례위험모형에 의하여 결정요인을 분석한 결과를 요약하면 다음과 같다. 1. 태아사망 구성백분율은 1974-1975년에 100건의 임신 중 6.1%에서 1984-1985년에는 7.8%로 증가되었으며 같은 기간 중 인공임신중절 구성백분율도 29.9%에서 39.1%로 증가하였다. 2. 영아사망률은 1974-1975년에 1000명의 출생당 28.4에서 1984-l735년에는 13.9로 감소되었고 같은 기간 중 주산기사망률은 28.2에서 15.3으로, 신생아사망률은 19.8에서 11.2로 감소되었다. 3. 비례위험모형에 의한 다변량분석 결과 태아사망의 결정요인 분석에서는 1980년 이전과 이후의 임신코호트가 동일한 결과를 보였는데 태아사망 경험의 비교위험도가 32.2로서 절대적으로 유의한 요인이었고 첫 임신의 유산여부, 임신순위, 임신간격 등도 통계학적 으로 유의한 관련요인이었다. 4. 영아사망의 결정요인으로 1974년 이후 발생한 전체 출생자료에서는 거주지역, 출산순위. 영아사망 경험, 직업, 출산간격 등이 통계학적으로 유의하였고 1980년 이후의 출생코호트 자료에서는 출산순위와 거주지역만이 통계학적으로 유의한 요인이었다. 1983년 이 후 마지막 자녀에 대한 분석에서는 출산순위, 거주지역 외에 출산간격, 가구주의 직업이 어린이 사망과 통계학적으로 유의하였고 모자보건관리 변수 중에는 어린이 예방접종률이 중요한 요인으로 지적되었다. 5. 다변량분석방법으로 비례위험모형과 로짓모형을 적용하여 분석한 결과, 태아사망을 종속변수로 하였을 때 두 모형에서 공통적으로 유의한 결정요인은 임신순위, 임신간격, 첫임신의 소모 여부, 태아사망 경험 등이었으며 영아사망을 종속변수로 하였을 때는 거주지역, 출산순위, 출산간격 등이 두모형 모두에서 통계적으로 유의한 변수들이었다. [영문] The purpose of this research was to estimate the fetal and infant mortality rates in Korea and to determine related factors. For the study, data from the National Fertility and Family Health Survey conducted by Korea Institute for Population and Health in 1988 was analyzed. The units of analysis were all pregnancies and births that occurred after 1974 from 7922 married women. The specific objectives of this research were, firstly, to calculate annual infant, perinatal and fetal death rates by fiscal years, and secondly, to identify deter-minants of fetal and infant deaths by applying the proportional hazard model and logistic regression model. The results of the study are summarized below. 1.Infant death rates declined from 28.4 in 1974-1975 to 13.9 in 1984-1985, perinatal death rates from 28.2 to 15.3, and neonatal death rates from 19.8 to 11.2 (rates per 1000 births). 2.Fetal death rates increased from 6,1% in 1974-1975 to 7.8% in 1984-1985. The rates of induced abortion increased from 29.9% to 39.1% for the same period. 3.By applying the proportional hazard model and multiple logistic analyses to the data from all births after 1974, residence, parity, the experience of infant death, occupation and inter-birth interval were shown to be significant risk factors, while the data from the birth cohorts of 1980-1987 showed that only parity and residence were significant and their relative risks were above 2. By analyzing the data from the last births after 1983, parity, residence, inter-birth interval and occupation of the head of the household were shown to be significant and the relative risk of the vaccination status of children was 2.2 and proved to be the most important factor. 4.In the analysis of determinant of fetal deaths, the two pregnancy cohorts from 1980-1984 and 1985-1987 yielded the same results. The experience of a fetal death was found to be the decisive determinant with the relative risk of 2.2 and the induced abortion of the first pregnancy, gravidity, and ter-pregnancy interval also ranked as significant factors of fetal deaths. To sum up the results, the infant death rates showed a steep decline during the period between the latter part of the 1970's and the earlier part of 1980's, mainly due to the rapid economic and social development of Korea and to the decrease in fertility caused by population control policies in the 1970's. Other effective health care policies expedited such a decline. After the middle of the 1980's, the speed of descent seemed to slow down. Strong policies for maternal child health care are required in order to bring the level of infant death rates to 6, which are considered to be the lowest rates that can be achieved by modern medicine. One of the reasons why the infant death rates are still high in rural areas and in mothers of high parity can be explained by the fact that they belong to a higher risk group and have been excluded from maternal-child health care programs. For the prevention of fetal deaths, quantitative and qualitative prenatal care is necessary.prohibitio

Log-linear analysis for the study of affecting factors on perinatal and infant mortality in rural Korea

보건학과/석사[한글] 本 論文의 目的은 最近 우리나라 農村地域社會의 周産期死亡率과 　兒死亡率의 水準을 檢討하고 이러한 死亡率과 相關性이 높은 危險要因을 合理的인 分析方法으로 가려내고져 하는데 있다. 本 硏究에 利用된 資料는 世界保健機構(WHO)의 재정지원으로 順天鄕大學에서 實施한 「家族計劃 및 母子保健事業의 效率的 統合方案에 관한 硏究」의 評價調査 資料의 一部이다. 調査는 1984年 8月에 瑞山郡의 5個面의 2,267名의 有配偶婦人을 對象으로 실시되었으며 本 硏究에서는 1980年8月1日부터 1984年7月30日 사이에 이 婦人들로부터 發生한 모든 出産 1,522件을 對象으로 하였다. 分析의 첫단계에서 周産期死亡(死産과 新生兒死亡의 合)과 　兒死亡을 各各 婦人의 人口學的 危險要因, 社會·經濟的 危險要因, 姙娠歷에 따른 危險要因, 醫學的 危險要因으로 區分하여 단순제표에 의한 χ**2-검정을 하였다. 이 結果 全體 周産期死亡率은 1,000 出 産當 30水準이고 　兒死亡率도 1,000出産當 33水準이었으며 두 比率과 공통적으로 有意한 要因은 出産間隔, 婦人의 敎育程度, 難産 및 畸形兒出産經驗, 死産 및 死産兒經驗, 婦人의 慢性炳與否, 出産兒가 미숙아이거나 畸形兒인 경우 등이었다. 둘째단계에서는 단순상관성이 나타나는 變數中 사례수가 적거나 독립변수간에 共相關이 높은 變數를 除外하고 出産間隔, 婦人의 敎育程度, 死産 및 死亡兒出産經驗, 難産經驗, 婦人의 慢性炳與否, 出産順位 등 6개의 變數를 要因變數로 채택하고 死産과 　兒死亡을 合한 경우를 反應變數로 하여 多變數線型分析(multiple loglinear analysis)를 하였다. 이 結果 死産 및 　兒死亡率에는 出産間隔, 死産 및 死亡兒經驗, 婦人의 慢性炳與否 順으로 有意한 相關性을 나타내었다. Log-linear analysis for the study of affecting factors on perinatal and infant mortality in rural Korea Han, Sung-Hyun Department of Public Health, The Graduate School of Yonsei University (Directed by Professor Yang, Jae Mo, M.D.) This study is attempted to identify the status of perinatal mortality (sum of still births and neonatal deaths) and infant mortal its, and to identify the significant risk factors related to these mortality rate in recent Korean rural community by using a method of the rational analytic approach. The data for this study is a part of Soon Chun Hyang University's evaluation survey of "An Integrated Family Planning and Maternity/Infant Care Services" under the sponsorship of WHO. While the target group of the evaluation survey was upon all the 2267 eligible women of five myuns in Seosan County on August 1984, the concerning target cases of this study was gathered of 1522 birth cases produced by those eligible women from August 1st 1980 to July 30 1984. (Which period meant the time of intervention project of SCH University). In the first phase of this analysis, it was revealed that the status of perinatal mortal its rate of this studs group was 30 births per 1000 births and infant mortal its rate was 33 per 1000 births. Each status of perinatal mortality and infant mortal sty was simple cross-tabled by risk factors of eligible women concerned with demographic. socio-economic, pregnancy history and medical variables with X**2-test. The result of this approach showed that the common significant influencing factors on these rates were birth interval, educational level of eligible women, experience of the difficult delivery and of the deformity. experience of the still-birth and the dead children, existence of the chronic disease of eligible women and the premature or the deformity of index birth. In the second phase of analysis, it was adopted six factors as risk factors e,g. birth interval, education level of eligible women, experience of the still-birth and dead children, experience of difficult delivery, existence of chronic disease of eligible women and birth parity, And perinatal and infant mortality was considered as a response variables to attempt to apply the multiple log-linear analysis for this study. The result of this analysis showed the significant ordered interrelationships between mortality rate and above six variables in the order of firstly birth interval, experience of the still-birth and dead children and existence of chronic disease of eligible women. [영문] This study is attempted to identify the status of perinatal mortality (sum of still births and neonatal deaths) and infant mortal its, and to identify the significant risk factors related to these mortality rate in recent Korean rural community by using a method of the rational analytic approach. The data for this study is a part of Soon Chun Hyang University's evaluation survey of "An Integrated Family Planning and Maternity/Infant Care Services" under the sponsorship of WHO. While the target group of the evaluation survey was upon all the 2267 eligible women of five myuns in Seosan County on August 1984, the concerning target cases of this study was gathered of 1522 birth cases produced by those eligible women from August 1st 1980 to July 30 1984. (Which period meant the time of intervention project of SCH University). In the first phase of this analysis, it was revealed that the status of perinatal mortal its rate of this studs group was 30 births per 1000 births and infant mortal its rate was 33 per 1000 births. Each status of perinatal mortality and infant mortal sty was simple cross-tabled by risk factors of eligible women concerned with demographic. socio-economic, pregnancy history and medical variables with X**2-test. The result of this approach showed that the common significant influencing factors on these rates were birth interval, educational level of eligible women, experience of the difficult delivery and of the deformity. experience of the still-birth and the dead children, existence of the chronic disease of eligible women and the premature or the deformity of index birth. In the second phase of analysis, it was adopted six factors as risk factors e,g. birth interval, education level of eligible women, experience of the still-birth and dead children, experience of difficult delivery, existence of chronic disease of eligible women and birth parity, And perinatal and infant mortality was considered as a response variables to attempt to apply the multiple log-linear analysis for this study. The result of this analysis showed thesignificant ordered interrelationships between mortality rate and above six variables in the order of firstly birth interval, experience of the still-birth and dead children and existence of chronic disease of eligible women.restrictio

Temperature-dependent Interaction Parameter of Polymers containing Polyvinylpyridine

2

Investigation of Deuterated Short Diblock Location in Block Copolymer Blends Having Hydrogen Bonding

2