http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
軟弱地에서 動力耕耘機 沈下量 推定을 위한 平板의 適正形象 및 크기에 관한 硏究
李揆昇,李鎔國,趙義健 成均館大學校 科學技術硏究所 1986 論文集 Vol.37 No.1
This study was conducted to determine the optimum shape and dimension of plate predicting the sink age of power tiller in soft paddy field. Various size of disc and rectangular plates were tried at five different soil moisture content, and the resules are summarized as follows. 1. Linear relationship is recognized between contact pressure and sinkage of plates using log-log paper at higher soil moisture content, but the plate sinkage is affected by hard pan in case of the lower moisture soil conditions. 2. Concerning the value of soil deformation coefficient K, the variation of measured values due to shape and size of plate can be practically negligible for the rectangular plates which have 2.5, 5 and 10cm width and with 2 or 3 aspect ratio, and the disc plate which has 20cm diameter. The variation of the exponent of sinkage n, can be practically negligible for the rectangular plates which have 5, 10 and 15cm width, and disc plates which have 20 and 30cm diameters. 3. Relationship between the sinkage of some type of plate and that of power tiller was linear. The closest relationship were found between the sinkage of power tiller and plates for 2.5 and 5cm width rectangular plates regardless of aspect ratio and for the disc plates having 10 and 20cm diameters. 4. Consequently, the optimum plate shape and size for predicting the sinkage of power tiller in soft paddy field are found as the rectangular plates which have 5 and 10cm width and 2 or 3 aspect ratio, and the disc plates having 10 and 20cm diameter.
최근 6년간 연세의료원에서 경험한 한국인 안면골 골절에 대한 임상적 연구
권준호,이충국,이의웅,민우석,윤중호,박형식 大韓顎顔面成形外科學會 1989 Maxillofacial Plastic Reconstructive Surgery Vol.11 No.1
This is a series of continuing research on facial bone fractures of Koreans worked by Dept. of Oral and Maxillofacial surgery, Dental College of Yonsei University, Seoul, Korea, since 1972. The study was based on a series of 630 patients with facial bone fractures treated as in patient at Yonsei Medical Center, Yonsei University, during the period of Jan. 1982 through Dec, 1987. The results obtained are as follows: 1. The ratio of Men to Women was 4.3 : 1, and admissions for facial bone fractures have been increased year after 1984. 2. The age frequency was highest in the third decade(38.3%). and fourth, second, fifth decade in orders. 3. The traffic accident was the most frequent cause of facial bone fractures(51.3%). 4. The most common location of facial bone fractures was the Mandible(35.3%), and Zygoma complex(29.8%), Nasal bone(15.0%), Maxilla(11.0%) were next in order of frequency. 5. In 291 patients of Mandible fractures, 226(77.7%) had fractures only in Mandible and 65(22.3%) had another facial bone fractures. The most frequent fracture site of mandible was the Symphysis(43.0%) and Angle(22.4%), and Simple fracture was the most frequent in type of fracture(66.9%). Intermaxillarty fixatin & Open reduction was major method of treatment(36.9%). 6. In 394 patients of Midface fractures 323(82.0%) had fractures only in Midface and 71(18.0%) had another facial bone fractures. The most frequent site of Midface fractures was zygoma complex & zygomatic arch(42.7%), and Simple fracture was the most common type of fractures. Observation(Maxilla :44.2%, Zygoma :51.0%) and Open Reduction(Maxilla :20.0%. Zygoma :23.5%) were the major method of treatment. 7. The frequency of Nasal bone fracture was about 1/5 of Midface fractures, and Closed Reduction(42.2%) was the major method of treatment. 8. The complication was reported in only 16 patients, and Malunion was the major complication. 9. Head(44.4%), Lower extrimities(14.5%) and Eye(12.3%) were injured commonly with facial bone fractures. 10. The elapsed time from injury to hospital was within 24 hours in 73.8% of patients, however 15.5% of patients arrived the hospital 72 hours after injury.
갑상샘 저하증으로 진단된 극소저체중출생아에서의 생후 초기 의 장관영양 식이양상 비교
최의경 ( Eui Kyung Choi ),이현승 ( Hyeon Seung Lee ),이은희 ( Eun Hee Lee ),김세연 ( Sae Yun Kim ),이병국 ( Byoung Kook Lee ),정영화 ( Young Hwa Jung ),허주선 ( Ju Sun Heo ),신승한 ( Seung Han Shin ),김이경 ( Ee Kyung Kim ),김한석 대한주산의학회 2015 Perinatology Vol.26 No.1
Purpose: We investigated the effects of hypothyroidism on feeding advancement in very low birth weight infants (VLBW). Methods: This study was a retrospective case-control study of 14 very low birth weight infants (VLBWIs) diagnosed with hypothyroidism and other 14 infants were recruited as age- and weight-matched controls without hypothyroidism or hypothyroxinemia in Seoul National University Children’s Hospital between January 2007 and August 2009. We examined whether these infants gained weight more, achieved full-volume enteral feedings sooner, had fewer episodes of increased pre-gavage residuals, and had fewer days of parenteral nutrition. Results: Until full enteral feeding (120 mL/kg/day) was not statistically significant between the groups. In the hypothyroidism group, during the first 14 days after birth, the volume of feeding was smaller [14.7 (0.5-84.0) mL/ kg/day, P=0.041], the episodes of increased pre-gavage residuals were frequently observed [16.7 (0.2-78) times, P=0.036], and the duration of central line was significantly longer [18 (10-50) days, P=0.018]. In hypothyroidism group, mean day at first L-thyroxine supplementation was 24.2±10.2 days after birth. L-thyroxine administration boosted thyroid function for hypothyroidism infants, helped them tolerate a larger amount of enteral feeding [from 89.5 (2.9-160.8) to 146.9 (31.8-178.8) mL/kg/day, P=0.002] and decreased episodes of excessive gastric residuals [from 5.5 (0-41.6) to 0 (0-44) time, P=0.026]. However, no more weight gain was statistically found. Conclusion: In VLBW infants, hypothyroidism may induce feeding intolerance. L-thyroxine supplementation was effective in feeding advancement on preterm infants with hypothyroidism.
이충국(Choong Kook Lee),이의홍(Eui Hong Lee),차인호(In Ho Cha) 대한구강악안면외과학회 1985 대한구강악안면외과학회지 Vol.11 No.1
Secondary bone grafts of alveolar clefts provide bony support to adjacent teeth of clefted area, prevent from relapse of orthodontic arch expansion, close oroantral fistula. This is a case report of 4 unilateral alveolar clefts and/bilateral alveolar cleft, which is corrected by secondary bone graft with iliac cortical and marrow-cancellous bone.
이충국(Choong Kook Lee),양성익(Sung Ik Yang),이용환(Yong Hwan Lee),이의홍(Eui Hong Lee),심현구(Hyun Goo Shim),차인호(In Ho Cha) 대한구강악안면외과학회 1985 대한구강악안면외과학회지 Vol.11 No.1
In many cases, orthognathic surgical cases require multiple osteotomies in the maxilla and mandible to achieve the most desirable results. We have treated 7 patients with the dentofacial deformities by simultaneous repositioning of the maxilla and mandible. The results are as follows: 1. The mean duration of the surgical procedure was 9.56 hours. 2. The mean length of hospitalization was 8.86 days. 3. All patients required blood transfusions. They received a mean of 3.86 pints. 4. No patients experienced significant airway embarrasment requring emergency procedures.
합성한 crown eher 모델 화합물에서 금속이온의 추출 특성 연구
이용희(Yong-Hee Lee),서명교(Myung-Gyo Suh),노종수(Jong-Su Roh),이국의(Kook-Eui Lee),이영세(Young-Sei Lee) 한국산업융합학회 2003 한국산업융합학회 논문집 Vol.6 No.3
To extract alkali metal ions and heavy metal ions, search for crown ether model compounds (4a-b, 5a-b, 6a-b) bearing side arm has led to achieve in 5~6 steps starting from 2,6-dimethylaniline. The determination of structure in their compound derivatives were on the basis of melting point and nuclear magnetic resonance spectroscopy. In the solvent extraction of metal ions from the synthesized derivatives, we observed that silver ion has only high selectivity for synergistic ligation of crown ether.