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군 특수차량용 인휠 드라이브 기어박스의 가속 내구성시험에 관한 연구
이용범,이용범,이기천,이종직,임신열,김우진,김광민 유공압건설기계학회 2022 드라이브·컨트롤 Vol.19 No.3
The in-wheel drive gearbox for military special vehicles converts the high-speed & low-torque output generated by the electric servomotor, into low-speed & high-torque mechanical power. As the vehicle is remotely maneuvered in mountainous terrain, wet fields, rough terrain, etc., the gearbox must generate a maximum input speed exceeding 5,000 rpm, a maximum torque of 245 Nm, and MTBF of 9,600 km. The purpose of this study was to analyze the failure mode of the gearbox, to ensure the durability of the in-wheel drive gearbox. Also, the field load test data of the vehicle was analyzed, the acceleration durability test standards were established, the acceleration durability test was conducted, and the durability test results were analyzed as well.
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이용범 대한한의학원전학회 1999 대한한의학원전학회지 Vol.12 No.2
《Yongchu(靈樞)》 is completed as a result of gathering several treatises about oriental medicine in B.C. 3c ∼ A.D. 1c, and esteemed as a bible of oriental medicine, especially very much quoted in acupuncture fields. But the name of 《Yongchu(靈樞)》 wasn`t in existence at that time. Until A.D. 3c, it had been named after 《Guguen(九卷)》, given it`s number of volumes, and since then mainly named after 《Chimgueng(針經)》, given a word of the first volume. After A.D. 6c, under the influence of Taoism(道家), it was titled 《Yonchu(靈樞)》, 《Guhe(九墟)》, 《Gureong(九靈)》 etc. Yonchu(靈樞), guhe(九墟), gureong(九靈) are words which is connected with Taoism(道家). In 1155, Sung Sa(史崧) published 《Yongchu(靈樞)》, which became a textbook of oriental medicine, so other titles disappeared since then. 《Yonchu(靈樞)》, 《Guhe(九墟)》, 《Gureong(九靈)》, 《Guguen(九卷)》, 《Chimgueng(針經)》 are not the same book, but the contents are almost similar, and some letters are different. Especially the textbook, pubished by Sasung(史崧), had been related to the 《Chimgyeng(針經)》, delivered to North-Song(北宋) dynasty by Jong-Gag Haung (黃宗慤), an envoy of an ancient Korean state(918-1392). So I expect to progress the study of medical exchange about it in the future.
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반복적인 과배란 처치 경험이 있는 한국흑염소에서 난포 자극 및 복강경을 이용한 난포란 채취(LOPU)
이용범,이두수,조상철,신상태 韓國受精卵移植學會 2014 한국동물생명공학회지 Vol.29 No.1
Laparoscopic ovum pick-up (LOPU) is a convenient method for collecting oocytes in small ruminants. LOPU has the advantage of being a less invasive means of oocyte collection, thereby allowing for a repeated usage of the oocyte donor animals. A total of 25 Korean black goats were used in the winter season (December to February) and LOPU was applied to the goats which had been treated for superovulation more than two times during the last twelve months. Estrus was synchronized with an intravaginal insert containing 0.3 g progesterone for 10 to 12 days. Ovaries were hyperstimulated with eCG 1,000 IU oneshot, FSH with eCG (50 mg / 1,000 IU; 70 mg / 500 IU; 70 mg / 1,000 IU) oneshot or FSH multiple-shot with eCG oneshot (20 mg x 6 / 300 IU) given intramuscularly 72 h prior to LOPU. For these groups, the number of follicles (mean ± SEM) observed which developed to larger than 2 mm in diameter were 1.6 ± 2.5, 4.3 ± 3.1, 5.5 ± 4.2, 6.6 ± 2.1 and 8.8 ± 7.8, respectively. Oocytes were aspirated by using OPU needles and a vacuum pump. The overall oocyte retrieval rates were 41.4%. Oocytes were matured in TCM-199 supplemented with 10% (w/v) bovine serum albumin+ 10 μg/ml FSH+ 1 μg/ml 17β-estradiol for 27 h at 39℃ in 5% CO2 in air. Oocytes were parthenogenetically activated by ionomycin combined with 6-diethylaminopurine (6- DMAP). Total oocyte maturation and cleavage rate were 67.3% and 78.8%, respectively. In summary, LOPU is a useful oocyte collection method in Korean black goats that can provide immature oocytes for transgenesis or nuclear transfer.
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