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成煥泰,吳澤烈,吳煥燮 慶熙大學校 1980 論文集 Vol.10 No.-
In this study, the optimum mathematical models were made in order to derive Optimum Machining speed which is due to be established in the production of each manufactures as an important parameter based upon the cutting speed, in case of making manufactures of multi-kinds into unit-production processing. The economical optimum cutting speed has been set up by using the above phenomenon as a proper system, and the results from the comparative analysis between the above model & the actual cutting work data, are summarized as follows. (1) The mathematical models for the optimum machining speed are derived into the expressions (23), (24), (25), (26), (27), (28), (29). (2) The basic expressions of the optimum machining speed are derived into (32), (34), (36), (37), (39), (40), (41), (44), for the purpose of each estimation of the maximum efficiency standard, the minimum cost standard and the maximum profits rate standard. (3) The example of setting up the optimum cutting speed of multi-kinds manufacturing production was formulated, and the experimental theoretical values were known to be in the same range as a result of the comparative study between the cutting speed obtained by the cutting test & the optimum cutting speed calculated by the theoretical expressions.
김환섭,이은석,유병열 한국레크리에이션 교육학회 1999 한국여가학회지 Vol.1 No.1
The purpose of this study was to analyze the relationships among participation degree and pattern on leisure sports and the characteristics of health care. The subject of the study was selected by multi-stage stratified cluster random sampling among the sports center and sports club to participate sports program whose age were 20-60 year old among inhanitant the Seoul metropolitan area. The data were collected through a questionnaire adapted from Payne and Hahn's (1986) ‘Understanding Your Health-A personal profile; Evaluating Your Health’. The pilot test was executed after the questionnaire was translated into Korean. The statistics employed the study were validity and reliability test, χ2 verification, frequency, ANOVA, multiple classification analysis, ANCOVA and Multiple Regression Analysis. The results that were derived form these processes were as follows. 1. There is partial difference according to the participation patterns of Leisure Sports. There were differences according to stress managent, physical fitness, social relationship, nutrition, drinking, smoking, drug use care, health comsummersion. 2. There is a partial difference according to the dimensions of Leisure Sports. There were differences according to physical fitness, social relationship, nutrition, drinking, smoking, drug use care, heredity.
Yong, Hwan-Yul,Bae, Bok-Soo,Kim, Seung-Dong,Lim, Yang-Mook,Ha, Yong-Hee,Oh, Chang-Sik,Kim, Myoung-Ho,Jo, Sin-Il,Yoo, Mi-Hyun,Jeong, Yu-Jeong 韓國受精卵移植學會 2010 한국동물생명공학회지 Vol.25 No.4
On January 6, 2010, two months earlier than normal breeding season, a red fox vixen was implanted with synthetic GnRH analogue, Deslorelin. Blood was sampled every 2~3 days from the day of implant to identifying spermatozoa on stains of epithelial cells. Estradiol and progesterone were examined. Even though the vixen was in non-breeding season, she was mated by a male fox. Pregnancy was confirmed by canine pregnancy detection kit that detect relaxin released from placenta. Four healthy pups were born on March 9, 2010. This is the first report showing synthetic GnRH can activate ovarian function and lead to fertile estrus of red fox in non-breeding season.
Tooth Wear of Two Male Giraffes (Giraffa camelopardalis) in Winter Season
Yong, Hwan-Yul 韓國受精卵移植學會 2010 한국동물생명공학회지 Vol.25 No.3
Two male reticulated giraffes (Giraffa camelopardalis reticulata), 21-year-old, died of nutritional deficiency that primarily caused by serious tooth wear at Seoul Zoo in winter. A 970 kg-weighed giraffe showed tooth wear of premolars, molars and incisors at necropsy. A foreign body in the rumen, congestion and ulcer of abomasum and duodenum were also observed. Mild appearance of serous fat atrophy in pericardial sac suggests that lack of nutritional intake caused by tooth wear can become harmful enough to threat life. At the necropsy of a 1,290 kg-weighed giraffe, a large quantity of sandy soil were found in the rumen which would stuck the pathway of well-fermented ruminal contents at esophageal groove. Nutritional deficiency could be suspected to urge this giraffe to graze grass on the ground along with sandy soil. Secondarily, the soil damaged teeth and become a culprit making irregular tooth wear and mild serous fat atrophy. Nutritionally good care of geriatric animals is needed especially for browsing animals like giraffes and critically in winter season.
Yong, Hwan-Yul,Kim, Myoung-Ho,Ha, Yong-Hee,Kim, Han-Woong,Kim, Mi-Young,Cho, Dong-Gil,Oh, Chang-Sik,Kim, Doo-Hee,Lim, Yang-Mook,Yoo, Mi-Hyun,Kim, Seung-Dong 韓國受精卵移植學會 2011 한국동물생명공학회지 Vol.26 No.3
Eight female Himalayan tahrs (Hemitragus jemlahicus) were estrus-synchronized, and transcervically inseminated with frozen-thawed semen in September, 2009, about 2 to 3 months earlier than their natural breeding season. Intravaginal progesterone-releasing devices were inserted into vaginas of six Himalayan tahrs on September 7, and the other two on September 8 to suppress luteal function of ovaries. The devices had been placed deep inside the vagina prior to withdrawal on September 23. A day before CIDR removal, a combination of PMSG 400 IU and hCG 200 IU was intramuscularly injected. Forty hours later, frozen-thawed semen was transcervically inseminated. Pregnancy diagnosis was performed 39 days later by analyzing progesterone level of serum. Every treatment was done under anesthesia inducted by xylazine injection. In conclusion, vaginal discharge of cervical mucus, hormonal changes induced by implant-typed or muscularly injectable hormones and widening of cervix enough to insert an insemination gun into uterine body were achieved in non-breeding season. Moreover, the first inseminated Himalayan tahr, 36 hours after CIDR removal was assumed to be pregnant but the fetus may have been lost due to the use of anesthetic drug.
Serous Fat Atrophy of a Reticulated Giraffe (Giraffa camelopardalis)
Yong, Hwan-Yul 韓國受精卵移植學會 2010 한국동물생명공학회지 Vol.25 No.4
A female reticulated giraffe (Giraffa camelopardalis), 20-month-old, 342 kg, died at Seoul Zoo on January 2, 2009 after a stressful episode of chronic diarrhea. Given the appearances postmortem, it was strongly suspected that the giraffe suffered from malnutrition for a long time. Typical appearances of serous fat atrophy were shown on most fat tissues of body organs such as heart, bone, liver, mesentery and kidney. In this study, the sudden death that had been known as "peracute mortality syndrome" was clearly identified to have resulted from a lack of understanding the Browser's diet and general failure in giraffe husbandry. Individualized care and high quality hay must be provided to compensate higher consumption of metabolic energy and to prevent animal loss in winter season.
Yong, Hwan-Yul,Park, Jung-Eun,Kim, Min-Ah,Bae, Bok-Soo,Kim, Seung-Dong,Ha, Yong-Hee,Oh, Chang-Sik,Kim, Doo-Hee,Kim, Myoung-Ho,Yoo, Mi-Hyun,Ro, Sang-Chul 韓國受精卵移植學會 2010 한국동물생명공학회지 Vol.25 No.4
Four estrus-induced Himalayan tahrs (Hemitragus jemlahicus) were inseminated with frozen-thawed semen by laparoscopic or transcervical insemination techniques with no regard to the site of ovulation in non-breeding season. In June and July, 2009, estrus was synchronized by Eazi-Breed (Controlled internal drug release; Pfizer Animal Health, New Zealand) insertion for 16 days and PG 600 (PMSG 400IU, hCG 200 IU; Intervet, Netherlands) injection (IM) a day before removing . Forty eight hours later, laparoscopic or transcervical insemination was done to each of two tahrs under anesthetic condition inducted by ketamine (1.5 mg/kg) and medetomidine (0.09 mg/kg). For examination of estradiol and progesterone, blood was collected right before insertion, PG 600 injection, removal and insemination. Estradiol levels of four tahrs (No. 1, 2, 3, 4) before insertion and insemination were 13.3, 8.8, 14.3, 12 pg/ml and 23.5, 25.5, 21.1, 11.5 pg/ml, respectively. Progesterone levels of four tahrs (No. 1, 2, 3, 4) before insertion and insemination were 1.8, 0.05, 0.63, 0.61 ng/ml and 1.03, 0.37, 1.48, 2.12 ng/ml. Except for No. 4 tahr, cervices showed cervical mucus and opened enough to penetrate with embryo transfer gun sheet usually used for cows. Therefore, No.4 was laparoscopically inseminated together with No. 1. In conclusion, none of four Himalayan tahrs was pregnant. However, we proved that estrus could be induced by CIDR and PG 600 injection in non-breeding season, and laparoscopic or transcervical insemination with frozen-thawed semen could be one of assisted reproductive techniques in Himalayan Tahr.