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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.
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.
이재호,홍혜숙 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2
A clinical study of patent ductus arteriouosus was done in 50 cases of pediatric age, confirmed by cardiac catherization or operation, at the Department of Pediatrics or Chest Surgery, College of Medicine, Chungnam National University from December, 1979 to June, 1986. The results were obtained as follows : 1) PDA was more common in female (1:2.1) and the highest age group was 42%, from 5 to 10 year old. 2) The most common clinical history is frequent URI(70%). Congestive heart failure & pneumonia history was each 24%. 3) Common physical findings were peripheral bounding pulse(78%), thrill(58%), chest deformity(36%), growth retardation(16%). The murmur characters were machinary(60%), systolic & diastolic(16%) and only systolic (24%). 4) Pulmonary artery hypertension was 50% of 48 cases. The ratio of pulmonary flow to systemic flow was as follows. Below 1.5 was 38%, 1.5 to 3 was 45%, above 3 was 17% of 42 cases. 5) Electrocardiogram was normal (42%), LVH (32%), RVH (10%) & BVH (16%).
이진호,허진국,나종천,김의석,이혜경,신보문,김석호,고행일 대한감염학회 2004 감염과 화학요법 Vol.36 No.4
비장티푸스 살모넬라증에 의한 장열과 장천공은 매우 드물다 저자들은 방어기전의 손상이 없는 건강한 성인에서 비장티푸스성 D군 살모넬라 장열에 동반된 장천공이 발생한 예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. The case of enteric fever and bowel perforation caused by nontyphoidal Salmonella spp. is extremely rare. We report a case of a 28-year-old man who suffered from enteric fever with complicated a small bowel perforation, which is a known complication of S. typhi and S. paratyphi infections. The culprit later proved to be nontyphoidal group D Salmonella spp. in our case.
이승룡,장규섭,이석건,윤혜현,한태룡 충남대학교 농업과학연구소 2000 농업과학연구 Vol.27 No.1
상기 실험으로부터 얻어진 결과를 요약하면 다음과 같다. 1. Hunter-value를 측정한 결과 hunter L-value 즉, 백색도에 있어서는 glycerin+carthamin+locithin의 경우가 실온저장 및, 열악조건 그리고 광조사시에 있어서 모두 8 시간이 경과하면서부터는 급격하게 상승하는 모습을 보였다. 2. 실온하에서 hunter a-value 즉, 적색도에 있어서는 carthamin 첨가구가, b-value 즉, 황색도에 있어서는 paprika 첨가구가 더 강하게 나타났다. 열악조건에서는 실온저장의 경우와 다소 다른 양상을 보여주었는데. D.W+carthamin+lecithin의 경우에 있어서도 hunter L-value가 낮은 값을 나타냈으며, hunter a-value의 경우 soybean oil+paprika에서도 높은값을 보여주었다. 3. 유변학적 특성에 대한 실험에서 비교적 고점도를 가지고 있는 glycerin을 base material로하였을 때는 이에 비해 저점도라고 할 수 있는 soybean oil이나 증류수가 쓰여졌을 때보다 spindle의 rpm에 따른 viscosity나 shear rate 및 shear stress등의 같이 월등히 높은 값을 나타냈다. 그리고, 일반적으로 spindle의 rpm에 대한 shear rate 및 shear stress의 값은 비례적으로 증가하는 경향을 나타냈다. 유화제의 사용여부에 있어서는 lecithin을 사용했을 경우. 사용하지 않았을 때보다 높은 점도를 나타냈고, 동일한 조건에서 carthamin보다는 paprika가 두 배 정도 더 높은 점도를 나타냈다. 4. soybean oil을 사용한 실험구에 있어서는lecithin의 첨가유무가 점도에 아무런 영향을 미치지 않는 것으로 나타났으나, glycerin을 사용한 실험구에 있어서는 유화제인 lecithin을 병행했을 경우, 특이하게도 오히려 paprika에서보다 carthamin에서 더 높은 점도를 나타냈다. 5. Shear stress의 경우 soybean oil 첨가구와 glycerin 첨가구가 현저한 차이를 보이며 증가한 반면, shear rate에 있어서는 두 가지 경우모두 거의 같은 경향을 나타낸 점이 특이했다. This study was peformed to evaluate the food technological properties according to different emulsion state of carthamus red pigment. For making emulsion, lecithin was used as an emulsifier and polyglycerol monooleate(PGMO) and polyoxyethylene sorbitan monooleate(Tween 80) were used as an assistant, and glycerin, distilled water and soybean oil were used as base materials respectively. Paprika stock solution was used for comparing carthamin on the rheological properties. The results were described as following; 1. Hunter L-value was not drastically increased until passed by 8 hours for glycerin, carthamin, and lecithin mixed sample. 2. Hunter a-value was higher at carthamin added sample than others, and b-value was higher to paprika added sample than others. 3. The viscosity, shear rate and shear stress levels in which glycerin was used as base material were higher than soybean oil or distilled water. 4. In which soybean oil was used as base material, lecithin was not affected on the rheological properties. But, in which glycerin was used, the lecithin was higher affected on carthamin than paprika. 5. The value of shear stress was increased both carthamin and soybean oil. However, that of shear rate was shown similar trends.