다산부에서 자간전증의 임상적 고찰

이주롱,이석민,한효상,이해혁,이임순,이권해 순천향의학연구소 2001 Journal of Soonchunhyang Medical Science Vol.7 No.2

목적 : 전자간증 산모에서 초임신부와 다산부 각각의 임상적 특징을 조사하여 비교 분석하고자 하였다. 연구방법 : 1998년 1월부터 1999년 12월까지 2년간 순천향대학 서울병원에서 입원 분만한 임신성 고혈압성 질환 환자중 초임신부 106명과 다산부 50명, 총 150명을 대상으로 임상통계학적으로 조사 분석하였다. 결과 : 분만까지 임신기간의 비교시 초임신부에서는 33-36주에서 17.9%였고 다산부에서는 34.0%로, 다산부에서 조기분만의 예가 의의있게 많았다. 신생아 체중이 2500g 미만인 군이 초임신부군에서는 36.8%였고 다산부군에서는 62.0%로 다산부군에서 더 많았다. 임신성 고혈압성 질환의 중등도를 보면 중증자간전증의 초임신부에서 35.8%와 다산부에서는 44.0%로, 초임신부에 비해 다산부군의 중증 자간전증의 비율이 많았다. 결론 : 중증 임신성 고혈압성 질환이 다산부군에서 더 많았으며 적은 주수에서 제왕절개술을 시행해 출생아의 체중이 초임신부군에 비해 더 작았고 Apgar 점수도 더 낮았다. Objective : To study the clinical differences of primiparous and multiparous preeclamptic patients. Methods : We statistically analyzed 106 primiparous and 50 multiparous preeclamptic patients who were admitted to the Soonchunhyang University Hospital from January 1998 to December 1999. Results : It was statistically found that multiparae were more likely to give premature birth than primiparae: Thirty four percents of multiparae gave birth in the period between the 33rd and the 36th gestational weeks while 17.9% of primiparae did in the same period. Sixty two percents of the newborn babies of multiparae weighed less than 2500g. Among primiparae, the ratio was 36.8%. In addition, more multiparae(44.0% vs. 35.8%) suffered from severe preeclampsia. Conclusion : severe preeclampsia was found more frequently among multiparae. Since they gave birth earlier by cesarian section than primiparae, their babies weighed less and had lower apgar scores.

서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)

김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2

Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.

곡선교에서의 실험적 모드 추정과정의 특성연구

이형진,어석홍 국립7개대학공동논문집간행위원회 2003 공업기술연구 Vol.3 No.-

In structural health monitoring, the identification of modal properties can be one of the important issues. However, the identifiability of modal parameter hasn't been usually checked before the installation of hardware. In this paper, the identifiability of modal parameter particularly for the real existing curved bridge was investigated. The results show that curved bridges are very sensitive to the way to be modelled and usual number of measurements are not enough for the curve bridge.

대형구조물의 실험적 지진피해 예측을 위한 비선형 구조추정법 개발

이형진,어석홍 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-

This paper deals with the identification of parameters of a smoothed hysteretic model(Bouc-Wen model) as well as the estimation of hysteretic histories of each structural members, related to experimental seismic damage prediction of existing large structures. The structural damages can be classified into global and local (element-level) damages. In damage assessment of real structures, emphasis is usually placed on seismic damages of each structural members since information about the locations and quantities of structural damages is more useful for further applications. For the reason, a method is proposed to estimate hysteretic histories of each structural members from measured response histories of the structure. These histories can be used to evaluate various kinds of damage indices. Secondly, the parameter estimation method is applied to construct the nonlinear mathematical model of these hysteresis. To demonstrate the proposed techniques, several numerical and experimental example analysis are carried out. The results indicate that the proposed method can be very useful to assess local seismic damages of structures.

의약정보담당자(MR)의 기능 및 역할에 관한 연구

이동일,제해관,윤석준,안형식,문영배 한국의료QA학회 2003 한국의료질향상학회지 Vol.10 No.1

Background : Aim of this study is focused on the analysis of the needed abilities of medical representatives resulting in building up the market and increasing sales. It is to propose methods to increase this ability ensuring continuous growth in market share and profit. Methods : A survey was conducted between January 6 and May 31, 2003. Using SPSS(Version 10.0), the collected data was analyzed by Hotelling T2, factor analysis. Some hypotheses were selected to include the conclusion. Some questionnaires for physicians working in hospitals or clinics and the medical representatives working in a pharmaceutical company were created and asked to them to either prove or reject those hypotheses. The results were analyzed to find the primary factors that effect the interactions between physician and the medical representatives. These factors were also studied along with the theoretical research based on published references. Results : The results were as follows. The main reasons for the physician to meet with a medical representatives were collection of product informations needed for patient treatment and collection of informations on current medical issue and as well as personal interests. The main parameters by which physicians evaluate the medical representatives are human relationship including sincerity and manners and supply of accurate and unbiased information on products. Overall, the medical representatives’ perception on the importance of medical knowledge and ability to deliver it are lower than that expected by physicians. Conclusion : Medical and pharmaceutical companies’ environment are changed rapidly. And those changes forced medical representatives to set new roles and competency. In order to drive away from the past ‘rule of thumb’ and ‘adaptation to circumstance’, optimal method and systemic development to train and support the medical representatives should be quipped. They will help ,medical representatives to be specialists in medical knowledge and to understand the exact need of health care professions. Product competitiveness will be increased and eventually successful business can be achieved through it.

웨이블릿 변환을 이용한 가속도 기록의 이중 적분법

이형진,어석홍,박정식 국립7개대학공동논문집간행위원회 2002 공업기술연구 Vol.2 No.-

It is well known that double integration of measured acceleration records is one of the most difficult signal processing, particularly in the case of measurements on civil engineering structures. The measured accelerations on civil structures usually contain non-gaussian and low-frequency noises as well as acceleration records are non-stationary. For this type of signals, wavelet transform can be useful because of its inherent processing abilities for non-stationary signals. In this paper, the de-noising algorithm using the wavelet transform are slightly extended to process non-gaussian and low frequency noises, using median filter concepts. The example studies show that the intergration can be improved using proposed method.

오존 및 紫外線 照射에 의한 汚水의 複合酸化

이춘식,김형석,박승조 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.1

In case the wastewater contained various pollutants was treated with the complex oxidation treatment method utilizing the ozone and ultra-violet radiation, the removal rates of BOD, COD, SS, Tirbidity and E.Coli according to the ozone contact concentration were excellent. The following conclusions were obtained from the experimental results : 1. When the ozone contact concentration was above 12.lmg/l, the BOD removal rate and the effluent BOD concentration were above 90% and below 10mg/l, and then the COD removal rate was above 90%, also. 2. When the ozone contact concentration was above 12.lmg/l, the SS removal rate was about 60% at 40, 50 mins. of hydraulic retention time, but the removal rate was down to 40% at 60mins. of HRT. 3. When the ozone contact concentration was above 5.2mg/l, the E.Coli removal rate was about 100% without the hydraulic retention time.

일부 농약 취급 근로자들의 성호르몬 상태

이원진,김청식,김형수,이창훈,김진석 대한산업의학회 2000 대한직업환경의학회지 Vol.12 No.2

Objective : This study was carried out to determine the effects of occupational pesticides exposure on the level of serum Luteinizing Hormone (LH), Follicle Stimulating Hormone (FSH), testosterone in male workers. Methods : Twenty-two male workers exposed to pesticides were compared with twenty-eight male workers at same factory who were not exposed to pesticides. The selected variables for studying reproductive hormones were LH, FSH and testosterone. As part of the baseline health status, subjects were asked medical history. Results : There were no statistically significant differences on the level of LH, FSH, testosterone between the exposed and non-exposed group. Also the level of sex hormones were not significant difference with each department in exposed group. And the level of LH, FSH positively correlated with age. Conclusions : These results indicate that there are no alterations in LH, FSH, testosterone at workers exposed to pesticides. But our findings are highly preliminary because of a small sample size. Thus it calls for furthur investigation of the hormonal effects at workers exposed to pesticides.

染色廢水의 Simultant 處理

이춘식,김형석,박승조 동아대학교 환경문제연구소 1993 硏究報告 Vol.16 No.1

When the dyeing complex wastewater was treated with simultant process using the 8.0% aluminum sulphate solution and MMA(goods on trial sale), the optimum dose of 8.0% aluminum sulphate solution and MMA, the fluction of MLSS concentration, COD removal rate and SS removal rate were analyzed. The following conclusions were obtained from the experimental results ; 1) In case the MMA of 400, 600mg/l was injected, effluent COD and MLSS were respectively 38mg/l and 894, 1,235mg/l. This case showed excellent results as compared with the case that the same concentration of 8.0% aluminum sulphate solution was injected. 2) Incase the 8% aluminum sulphate solution of 400, 600mg/l was injected, effluent COD and MLSS were 53.48mg/l and 502, 540mg/l, respectively. 3) In case the 8% aluminum sulphate solution and MMA were not injected into aeration tank, the MLVSS in aeration tank was about 400-500mg/l and COD, SS of effluent were 68mg/l and 74mg/l, respectively.

폐굴껍질을 혼입한 콘크리트의 기초적 성질에 관한 실험적 연구

어석홍,이형진,황규한 國立 昌原大學校 産業技術硏究所 2002 産技硏論文集 Vol.16 No.-

The purpose of this study is to investigate the fundamental properties of concrete mixed with crushed oyster shells(OS) as coarse or fine aggregates. For this purpose, five reference mixes with W/C ratios of 0.4∼0.6 at intervals of 0.05 were considered. The replacement proportion of OS was varied with ratios of 0, 10, 30, 50 and 100% by volume of fine or coarse aggregate in the reference mixes. OS was washed and crushed for using as aggregates. New chemical reaction between crushed OS aggregate and and cement paste was tested through XRD and SEM analysis. The compressive and flexural strength properties were considered. Strength tests were carried out at the ages of 1, 3, 7, 14, and 28 days. The variation of workanility, air content and density, drying shrinkage of the specimens with different proportions of OS were also studied. Finally, the hollow concrete block using OS as a substitute material for fine aggregate was made for testing the application of OS. Experimental results showed that any new chemical reaction did not occur due to mixing crushed OS in ordinary concrete. The workability and strengths decreased with increase in proportion of OS. The same trend was observed in density and unit weight, but air content increased due to the inherent shape and texture of OS, which showed a possibility to produce light weight concrete with low strength by using OS as coarse aggregates for concrete. Tests on hollow concrete block showed that the compressive strength and absorption ratio were satisfied with quality requirements when the fine aggregate was substituted with OS up to 50% in volume.