다축 제어 시뮬레이터 링크부의 동특성에 관한 연구

정상화,류신호,박용래 朝鮮大學校 機械技術硏究所 2001 機械技術硏究 Vol.4 No.1

차량개발과정에 있어서 완성차량에 대한 실험방법은 크게 실차 주행실험과 실험실 재현실험의 두가지로 분류할 수 있다. 이 중 실험실 재현실험은 주어진 실험실내의 공간에서 차량의 주행상태를 반복, 재현함으로써 시간의 절감과 함께 공간 및 환경의 제약에서 벗어날 수 있으며, 실험의 지속적 재현성과 실험중인 차량을 수시로 관찰, 분석할 수 있어 취약부분 및 성능의 조기 확인이 가능한 장점이 있다. 이런 이유로 많은 국외 자동차사에서는 다축 제어 시뮬레이터를 이용한 실험실 재현실험을 활성화하여 차량개발기간의 단축은 물론 높은 신뢰성을 가진 고품질 자동차의 개발에 활용하고 있는 실정이나, 아직까지 국내에서는 수입하여 활용측면에서는 아직 초보단계를 벗어나지 못하고 있다. 본 논문에서는 실험실 재현실험의 구동부인 다축 제어 시뮬레이터에 작용하는 4가지 요소중 3가지 요소인 연직·전후·횡 하중등을 복합적으로 재현할 수 있는 링크 구조를 설계하여 동역학 해석 프로그램인 ADAMS를 이용하여 시뮬레이션을 수행하고, 링크부의 안정성 평가 및 최적모델의 사양을 결정하기 위해 FEM 해석을 하였다. Test in the development of vehicle consist of driving test and simulation test. The last one has many advantages. It can reduse time and cost during development, can overcome the spacial and environmental limitation, and can provides repeatabilities of similar experiments and various data. In these reason, the simulation test is widely used in the developed countries for developing new vehicles and analyzing the dynamic characteristics of vehicle developed.

自生 山菜類의 開發에 관한 硏究

申永澈,金在佶,申貞和 충북대학교 농업과학기술연구소 1992 農業科學硏究 Vol.10 No.1

In order to use as vegetable, studies on valuable wild plants-Pimpinella brachycarpa, Cryptotaenia japonica., Synurus deltoids., Solidago virga-aurea var. gigantean., Hemerocallis fulva. Were carried out by field observation and cultivation. The result were obtained as follow : 1. Pimpinella brachycarpa, Cryptotaenia japonica, Solidago virga-aurea var. gigantea were distributed at the higher altitude of 600M, but Synurus deltoids, Hemerocallis fulva were distributed under 500M. 2. Pimpinella brachycarpa, Cryptotaenia japonica, Solidago virga-aurea vat. Gigantean, Hemerocallis fulva except Synurus deltoids grew well on fertile soil in habitat. 3. The germination of Hemerocallis fulva were promoted at 25℃ under dark condition with Ethrel, whereas Synurus deltoides were promoted at 20℃ under dark condition with IBA treatment. 4. Te transplant seedlings of 5 plants, shading was necessary. Low light intensity under 5000Lux is recommended for low rate of bolting and for softening of tissue. 5. All 5 plants grew vigorously toward the end of July. 6. Plants would be harvested after 3 years with seed germination, but it would be desirable to transplant in order to reduce cultivation time. 7. It is desired that 5 plants should be subjected to suppressing or forcing cultivation.

에어로빅 운동이 비만 여중생의 복부비만과 심폐기능 및 인슐린에 미치는 영향

김기봉,신주화,이정아 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

The purpose of this study was to analyze the effects of aerobic exercise on abdominal obesity, cardiopulmonary function and serum insulin in obese middle school girls participated in aerobic exercise for 20 weeks. The conclusions are as follows ; 1. Total body fat, percent body fat, body mass index, waist circumference and waist-hip ratio were significantly decreased, but lean body mass was significantly increased in the changes of body composition factors. 2. Systolic blood pressure, diastolic blood pressure were significantly decreased, but maximal oxygen consumption was significantly increased in the changes of cardiopulmonary function factors. 3. Total cholesterol, triglyceride, low-density lipoprotein cholesterol and insulin were significantly decreased, but high-density lipoprotein cholesterol was significantly increased in the changes of serum lipid and insulin factors. In conclusions, aerobic exercise may be very effective to decrease the obesity and geriatric diseases.

초내열 합금 Alloy718의 저주기 피로시험에서 반복연화 및 R=X (X=0,-1)효과

최병학,신수근,신정근,김선화,윤기봉,염종택,박노광 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

The LCF properties for R=0 as tension-tension and R=-1 as tension-compression were examined in DA alloy718. While the hysteresis loops composed of ?ε_(t), ?ε_(p) and ?σ were figured with similaity in both of R=0 and R=-1, the loops of R=0 were continuely going down along the stress axis during cyclic fatigue progressing. It was caused by Bauschinger effect, which includes a tendancy for stress recovering as an amount of compression stress. The phenomena of cyclic softening in both of R=0 and R=1 seem to be caused by planar slip of dislocations, which was accompanied by shearing the γ'/γ" precipitates during the cyclic fatigue test.

한국 재래 나물콩 품종 및 계통의 콩나물 특성

황영현,이정동,조호영,권택화,정연신 慶北大學校農業科學技術硏究所 2002 慶北大農學誌 Vol.20 No.-

우수한 특성을 가진 나물콩 품종 육성을 위하여 국내 재래 나물콩 계통의 콩나물 특성을 분석한 결과는 다음과 같다. 1. 공시된 301품종 및 계통의 콩나물 전체길이의 범위는 9.5∼23.0cm, 하배축 길이는 5.9∼15.1cm, 뿌리 길이는 3.2∼9.2cm로 다양한 변이를 보였고, 수율에서도 121∼695%로 다양하게 분포하고 있다. 2. 공시된 301품종 및 계통의 종피색에 따른 콩나물 수율은 혼색종피종에서 409%로 가장 높게 나타났고, 백립중에 따른 콩나물 수율은 소립종일수록 높은 경향이었으며, 잔뿌리수는 흑색종피종과 갈색 종피종에서 현저히 적었다. 3. 콩나물 길이와 전체길이에 대한 뿌리길이의 비율, 수율을 기준으로 한 공시품종 및 계통들의 분포에서 장려품종보다 우수한 특성을 가지는 다수의 재래계통이 분포하고 있었다. 4. 콩나물 하배축의 색도는 백색도(L값)에서 장려품종이 재래계통에 비해 백색에 더 가까웠고, 적색도(a값)와 황색도(c값)는 장려품종보다 재래계통에서 높은 경향이었다. To develop good soybean varieties for sprouts. 285 indigenous lines and 16 recommending varieties were evaluated by the sprout and agronomic characteristics. The range of whole length, hypocotyl length, root length, and yield rate of sprouts was 9.5~23.0cm, 5.9~15.1cm, 3.2~9.2cm, and 121~695%, respectively. Yield rate of sprouts was the highest, 409%, in the lines of mixed seed coat color. At the same time, it was reversely proportional to seed weight : the smaller the seed weight, the higher the yield rate as in all other reports. The number of roots was significantly fewer in the lines of the black and the green seed coat color than others. Based on whole length, rate of root length, and yield rate of sprouts, many indigenous lines were evaluated much better than recommending varieties. In the hypocotyl color of sprouts, the brightness was higher in improved variety than indigenous lines but vice versa in redness and yellowness in general.

장기간 보관한 멸균물품의 오염 상태에 관한 연구

주홍순,조순덕,정재심,신동분,임바올라,노은지,이선희,송영미,최정화,백병윤,김미나 대한병원감염관리학회 2003 의료관련감염관리 Vol.8 No.1

낭종 적출후 악골 결손부 치유에 관한 동종골 이식 효과에 관한 연구

이동근,박화규,권경환,강문정,신기영,민승기,성헌모 大韓顎顔面成形再建外科學會 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.4

This study was aimed to suggest to better treatment method of jaw cyst that the maximum diameter was wider than 3cm, using different treatment and clinical and radiographic result. We divided the 60 patients into three groups, group A(20 patients) were treated with cyst enucleation and Decalcified Freeze-Dried Allogeneic Bone(DFDB) graft, group B(20 patients) were treated with cyst enucleation and autogenous bone graft, group C(20 patients) were treated with only cyst enucleation. Each group was evaluated with panramic radiograph and clinical sign & symptom at pre-op and post-op(immediate, 6, 12, 24, 36 month). Bone density was evaluated with disital densitometer. The result was as follows : 1. Post-Op infection was higher in group C(4 pts.) than in group A(1 pt.) and B(1 pt.) 2. Post-Op gingival recession was higher in group C(3 Pts.) than in group A(1 pt.) and B(1 pt.) 3. Anatomic distortion was higher in group C(3 Pt.) than in group A(1 Pt.), and B(1 pt.) 4. reoperation was done in two patients who were in group C 5. There were donor site morbidity in two patients 6. there was no significant difference between group A and B in their bony density in their follow up period(p>0.05). 7. There were significant differences between group A, B and group C in their bony density until post-op 24 months but a little differences at post-op 36 months(P<0.01)

개에서 피지선 과형성의 진단 및 치료 증례

박희서,손화영,정성목,송근호,조종기,이영원,신상태,김명철,김덕환,박성준 충남대학교 수의과대학 동물의과학연구소 2004 動物醫科學硏究誌 Vol.12 No.-

An eleven year old castrated male Maltese was presented to the Veterinary Medical Teaching Hospital of Chungnam National University. In physical examination, approximately 0.5 cm round mass was observed on tail base. This small elevated mass has also shown alopecic and firm configuration. It was differentially diagnosed as sebaceous adenoma and hyperplasia by fine needle aspiration. After surgical removal, the sample was diagnosed as sebaceous hyperplasia by histopathological examination. It has not yet shown any signs of recurrence and prognosis has teen good.

STZ 유발 당뇨쥐에서 시간에 따른 생리적 항산화계의 변화

이순재,양정아,김성옥,최정화,신주영,채영미,차복경 대구효성가톨릭대학교 응용과학연구소 1997 응용과학연구논문집 Vol.5 No.-

The purpose of this study was to investigate change of physiological antioxidative system according to the time in streptozotocin-induced diabetic rats. Sprague-Dawley male rats weighing 150±10gm were randomly assigned to one normal and five STZ-induced diabetic groups. Diabetic groups were classified to experimental period. Diabetes was experimentally induced by intravenous injection of 55 mg/kg of body weight of STZ in citrate buffer(PH 4.3) after 6 weeks feeding of three experimental diets. Animals were sacrificed at 0, 3, 6, 12, 18th days of diabetic states. 1. Activity of superoxide dismutase(SOD) in liver was increased in that of diabetic mellitus(DM) groups at 3th day but that of DM groups was not significant from 6th day according to period. Glutathion peroxidase(GPX) was significantly decreased in DM groups from 6th day 2. Reduced glutathione(GSH) contents in liver significantly decreased in diabetic groups from 3rd day compared with those of DM groups according to the period. Oxidized glutathione(GSSG) was higher from 6th day. GSH/GSSG ratio was significantly lower than that of normal group from 3rd day to all experimental period 3. Contents of vitamin E in liver of DM groups were significantly decreased compared with that of normal group from 6th day. 4. Lipid peroxide(LPO) contents in liver of DM groups were significantly increased compared with that of normal group from 3rd day. The present results indicate that STZ-induced diabetic rats were reduced by antioxidative defense system and taken by peroxidate damage in tissue compared with normal group from 3rd day or 6rd day after injection STZ. It lended to acceleration all diabetic groups but no significance according to the experimental time.

저혈당을 동반한 자가면역 인슐린 증후군 2예

박시형,이신원,정귀화,최창훈,이순희,한정훈,김정국,하승우,김보완 대한내분비학회 2001 Endocrinology and metabolism Vol.16 No.4-5