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이성민,김봉석,송준호,이수훈,이혜진,이문구,송준엽,이창우 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-
Recently, the robustness against daily impact is important according to portablization and downsizing of mobile electronics. Especially, almost parts of cellular phone should undergo drop test when they fall 1.5 m above ground. This test simulates the case when cellular phone slips through user's fingers while he is talking on the phone. This paper studies a drop test of auto focusing (AF) actuator for camera module in cellular phone. This component is composed of voice coil motor (VCM) as an actuator and leaf spring as a guide and suspension. The leaf spring's deformation is essential for the test because its permanent distortion disables the focusing, and then, a high quality photograph cannot be obtained. Up to now the drop test has been carried out after fabricating real AF actuator. We propose a dropt test model which simulates the drop test based on finite element analysis. This model makes us enable investigate the stress acting on the clamping and curved parts of leaf spring. Stress over Von Mises criterion lets the spring deformed permanently, and then AF actuator malfunctioned, It helps us to design and modify AF actuator without manufacturing the real product. And also, it saves the time and cost for the development of new products.
중환자에서 동맥혈 가스분석 횟수와 그로인한 실혈량에 대한 연구
이석열,전철우,정영수,오희숙,마분란,이정미,정혜영,이만복,이길노 순천향의학연구소;Soonchunhyang Medical Research Institute 2000 Journal of Soonchunhyang Medical Science Vol.6 No.1
Background : Arterial blood gas analysis is the most comon exam in intensive care unit. In this study, the frequency of blood gas analysis and the amount of blood loss after Blood Gas Analysis in Intensive Care Unit were observed. Methods : From November 1999 to February 2000, 115 patients admitted to intensive care unit at Soonchunhyang university Kumi hospital were studied prospectively for the frequency of blood gas analysis and the amount of blood loss after blood gas analysis in Intensive Care Unit. Results : The mean value of frequency of blood gas analysis was 6.41±6.49 and the mean value of amount of blood loss after blood gas analysis was 0.78ml. This was lower than that of other foreign reports. The patients with ventilator therapy above 24 hours showed higher frequency of blood gas analysis than that of not applied ventilator patients. Pulse oxymetry was applied to all patients and the frequency of blood gas analysis was decreased due to the use of strict pulse oxymetry. Conclusion : Doctors and nurses in intensive care unit keep in mind that adequate blood sampling is needed for the decrease of blood loss. Education and protocol for the decrease of blood loss after arterial blood gas analysis may be necessary.
이재호,이양원,권오균,홍혜숙 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2
Statistical analysis of the 172 congenital heart disease patients who had diagnosed by cardia catheterization and angiography in the Department of Pediatrics, Chungnam National University College of Medicine from Sept. 1982 to Nov. 1985 was performed. The annual numbers of cardiac catheterization is increased. The overall congenital heart disease is most common in less than 3 year age group (27.3%) and then, 4-6 year age group (22.1%), 7-9 year age group (22.1%), 10-12 year age group (17.4%) and 13-15 year age group (11.1%) in this order. The most, common congenital cardiac anomaly is VSD(40.3%), and the next are PDA(28.8%) ASD(11.0%) and TOF(10.7%). VSD is the most common disease in the below 3 year age group, and above 7 year age group and PDA is in the 4-6 year age group.
1-(N,N-dimethylamino)pyrene-6-sulfonyl chloride를 형광유도체화체로 이용한 Norepinephrine의 HPLC 분석에 관한 연구
이윤중,김용희,이혜숙,박광신 성균관대학교 약학연구소 1991 成均藥硏論文集 Vol.3 No.1
Abstract-A rapid and high sensitive HPLC method for the determination of norepinehrine is described. 1-(N,N-dimethylamino)pyrene-6-sulfonyl chloride (DAPS-Cl) was used as a pre-column fluorescent derivtizing reagent for HPLC determination of norepinephrine. The optimal conditions for the derivatization of norepinephrine with DAPS-Cl such as reaction temperature, reaction time, and the amount of DAPS-Cl were described. The structure of derivative was confirmed from ^1H-NMR spectra. The DAPS-NE derivative was separated on a reverse phase column(ODS-1) using the mixture of acetonitrile and 0.05 M phosphate buffer (pH 4.5) as the mobile phase and monitored by fluorescence detector. Linearity of calibration curve was obtained and the ddetection limits in a 10㎕ injection volume was 200 fmol.
이숙영,정청송,윤혜현 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.6
The sensory characteristics of cream soup containing 0, 25, 50, 75 and lOO% rice flour were investigated in order to develop a new processed food using rice. The Hunter L(lightness) value increased with the amount of rice flour, while the a(redness) value and b(yellowness) value decreased, significantly. The viscosity of rice cream soup significantly decreased with the increasing amount of rice flour. Based on ths sensory evaluation, the cream soup samples with larger rice flour component showed a higher clean taste score, while those with the least rice flour resulted in higher darkness, viscosity, greasy taste, and softness. The overall acceptance was the highest in the cream soup with 75% and 100% rice flour. In terms of the color and viscosity, good correlations were observed between the sensory evaluation and the objective analysis. The overall acceptance showed a significant positive correlation with a clean taste, while there was a negative correlation with a greasy taste and the viscosity measured by a viscometer.
이숙희,박혜경 이화여자대학교 교육과학연구소 2008 교육과학연구 Vol.39 No.2
본 연구는 균형적 유아 읽기 프로그램이 유아들의 의미이해력, 해독능력, 음운인식 능력에 미치는 효과와 유아의 읽기 행동양상을 살펴보려는 목적으로 수행되었다. 연구 대상은 만5세 유아 100명이며 50명은 한글특성에 기초한 균형적 유아 읽기 프로그램을 적용하는 실험집단에, 50명은 발음중심교수법을 적용하는 비교집단에 배치되었다. 2개의 프로그램은 각 집단별로 10주간 주 2회씩 실시되었다. 사전·사후 검사 자료를 t검정과 공변량 분석한 결과, 실험집단은 의미이해, 해독능력, 음운인식능력에서 비교집단보다 통계적으로 유의미한 증가를 보였다. 또한 프로그램 실시과정에서 실험집단의 유아들이 비교집단의 유아들보다 활동에 흥미를 가지고 자발적으로 참여하는 행동을 보였다. 그러므로 균형적 유아 읽기 프로그램은 유아의 의미이해, 해독능력, 음운인식 능력을 증진시키는데 매우 효과적인 프로그램이라고 할 수 있다. This study was carried out to see if the balanced literacy program for young children affected the meaning-comprehensive ability, the decoding ability, and phonological awareness, and the acts of reading of young children. The subjects were 100 kindergarteners aged 5 years. 50 children participated in experimental group that applied to the balanced literacy program which was based on Hangeul characteristics. 50 children participated in the comparative group that applied to the phonics instruction. Both programs performed twice a week during 10 weeks separately. The results are as follows. The experimental group revealed a significant increase in meaning-comprehensive ability, decoding ability, and the phonological awareness when data was analyzed by t-test and Ancova. Also the acts of reading of the kindergarteners in the experimental group were shown more positive and active in the process of the program than those of the children in the comparative group. Therefore, the balanced literacy program for young children would be a very effective program for the improvement of the meaning-comprehensive ability, the decoding ability, and the phonological awareness of young children.
Column-Switching HPLC法을 利用한 血淸中의 Ciprofloxacin의 定量法에 관한 硏究
李允中,李惠淑,禹炳虎 성균관대학교 약학연구소 1990 成均藥硏論文集 Vol.2 No.1
Abstracts-A small precolumn(40×2 mm, i.d.) packed with Amberlite XAD-7 facilitates the determination of ciprofloxacin in serum by permitting direct injection of relatively small volume(100㎕) of diluted serum. A pH 7.0 phosphate buffer washes out the serum components and acetonitrile: methanol: 5 mM tetrabutylammonium bromide(pH 2.0) (10 : 5 : 85, v/v) subsequently elutes the drug from the precolumn through the analytical column. This method showed high precision with good sensitivity and speed, and a detection limit of 0.1㎍/㎖. The total analysis time per sample was less than 15 min, and the mean coefficients of variation of intra- and inter-assay were both less than 4.8%. The method has been successfully applied to serum samples from human volunteers receiving oral administration of ciprofloxacin.