• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.534-540
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• 1993

In this paper, we present an iterative learning method of compensating for position sensor error. The previously known compensation algrithms need a special perfect position sensor or a priori information about error sources, while ours does not. To our best knowledge, any iterative learning approach has not been taken for sensor error compensation. Furthermore, our iterative learning algorithm does not have the drawbacks of the existing iterative learning control theories. To be more specific, our algorithm learns a uncertain function inself rather than its special time-trajectory and does not request the derivatives of measurement signals. Moreover, it does not require the learning system to start with the same initial condition for all iterations. To illuminate the generality and practical use of our algorithm, we give the rigorous proof for its convergence and some experimental results.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.1167-1172
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• 2007

Generally inpipe robot needs force above standing for contacting robot to pipe. If the environment of the pipe-inside does not change, there is not a problem. But if the pipe radius change, or occur the obstacle which it does not intend, problem gets. So it uses a different system and must know an environment change, and changing the shape or a form of the robot. The research uses the flexible leg and is the robot which is adapted to the environment change of the pipe. The advantage of this robot is possible to move when it does not need to recognize a change of environment of pipe. Leg is bend with one direction. When it moves part that there are legs effect of leg direction the robot is moved with only one direction. If friction between legs and pipe is sufficient, not only verticality pipe moving, but also curved pipe moving. Also the obstacle of the pipe inside occurs and the diameter of the pipe inside changes, this robot can move if it does not use another system or device.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2007년도 춘계학술발표논문집
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• pp.199-202
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• 2007

논문에서는 첫째, 기존의 단순 One-path XOR 방법보다 안전한 M ${\ast}$ N Puzzle 기법을 이용한 Key 전송방법을 제안한다. 둘째, 생성된 Puzzle은 서버에 저장하지 않으므로 기존의 시스템보다 보안성이 높은 방법을 제안한다. 셋째, 클라이언트에서 복호화 할 때 OTP와 함께 Puzzle을 복호화 하는 클라이언트 복호화 시스템을 제안한다. 넷째, M ${\ast}$ N Puzzle 기법과 OTP를 조합으로 보다 안전한 키 전송을 제안한다.

• Asian-Australasian Journal of Animal Sciences
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• 제24권10호
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• pp.1386-1392
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• 2011

The aim of the present work was to study the effects of a polyherbal supplement on cross bred does, starting from the last month of pregnancy to weaning, on milk yield, kid birth weight and growth rate. Thirty does were divided into three treatments of ten each in individual pens: low level supplementation (LS), high level supplementation (HS) and non-supplemented treatment (NS) as control. Low supplemented goats were given 125 mg/kg BW/d of polyherbal combination; high supplemented goats were given 250 mg/kg BW/d. The study was carried out in 2008. Fifty-nine kids were born from all the experimental animals. There was no difference on milk yield between supplemented groups and control (p>0.05), although polyherbal supplementation had positive effect on litter birth weight and growth rate compared to control. Weaning weights were higher (p<0.001) in LS and HS compared to NS does. In both supplemented treatments compared to control, mortalities and morbidities were also lower in kids born. It is concluded that pre-partum to weaning supplementation increases kids growth rates and weaning weights, as well as reduces kid mortalities, but it doesn't have significant effect on milk production.

• 한국생활과학회지
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• 제23권3호
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• pp.395-408
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• 2014

The purpose of this study was to identify the effects of parent-child relationship perceived by university students on value of marriage and partner selection criteria. Questionnaires were distributed to 467 university students with questions covering topics including general personal information and characteristics, parent-child relationship, value of marriage and partner selection criteria. To analysis the data, t-test, ANOVA, and two step cluster analysis was used. The female group A with passive parent-child relationship had high level of negative value of marriage, male group D with active parent-child relationship had high level of romantic and instrumental value of marriage. The male and female passive group considered external condition as a partner selection criteria more than male and female active group does. As a partner selection criteria, passive male group recognized internal condition more than passive and active female group does. and active female group recognized situational condition more than passive male group does. This study reveals that university students' parent-child relationship does have an effect on their value of marriage and partner selection criteria. It is therefore proposed that diversify objectives and education content of family life education should relate not only to individuals' value of marriage but also to their parent-child relationship.

• 전자공학회논문지B
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• 제31B권9호
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• pp.57-66
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• 1994

In this paper, we present an iterative learning method of compensating for position sensor error. The previously known compensation algorithms need a special perfect position sensor or a priori information about error sources, while ours does not. to our best knowledge, any iterative learning approach has not been taken for sensor error compensation. Furthermore, our iterativelearning algorithm does not have the drawbacks of the existing interativelearning control theories. To be more specivic, our algorithm learns an uncertain function itself rather than its special time-trajectory and does not reuquest the derivatives of measurement signals. Moreover, it does not require the learning system to start with the same initial condition for all iterations. To illuminate the generality and practical use of our algorithm, we give the rigorous proof for its convergence and some experimental results.

• Asian-Australasian Journal of Animal Sciences
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• 제4권1호
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• pp.73-78
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• 1991

Sixty-one 5-11 month-old California, Chinchilla and New Zealand White rabbit were employed in this investigation. Thirty-three does were superovulated by injecting FSH/HCG subcutaneously or intravenously and then sacrificed at different hours after mating. The ova were collected from the fallopian tubes with Ham's F-10 medium supplemented with 0.4% bovine serum albumin (BSA) and 1% pregnant rabbit serum (PRS). Embryos were examined under an inverted DIC microscopy for observing the stage of development. We have found that the fertilized ova formed pronuclei at 19 - 20 hr postcoitus. Approximately at 26, 64 - 78 and 84 - 88 hr after mating, the fertilized ova cleaved further to 2-cell, morulae and blastocyst stage respectively. Another 28 does were allocated to the gene transfer study. Fourteen of the 28 does were sacrificed at 19 - 20 hr to donate the pronuclear stage ova for gene injection. The other 14 does were induced to pseudopreganacy by injection of 100 IU HCG intravenous as recipients. Four hundreds and seventeen ova were injected totally and 212 gene injected zygotes were transferred into the recipient oviducts. Five recipients became pregnant and 10 fetuses were obtained. Eight of the 10 fetuses were analysed for gene incorporation, but none of them were transgenic.

• Asian-Australasian Journal of Animal Sciences
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• 제15권6호
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• pp.772-776
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• 2002

This study was made with 631 does of 3 genetic groups and 1,112 of their kids allocated into 3 different locations to examine gestation length, litter size and litter weight in goats. Attributes studied were genetic group, parity, age of dam at kidding, weight of dam at breeding, season and location. Genetic group of dam affected significantly (p<0.01) size of litter but not gestation length and weight of litter. Selected Black Bengal (SBB) genetic group performed better in litter size and litter weight than random bred Black Bengal (RBB) and its crossbreds with Jamunapari ♂ (JBB). Litter size and weight were significantly affected by age of dam at kidding (p<0.01), weight of dam at service (p<0.001) and parity (p<0001). Size and weight of litter were found highest in SBB does, or does having 35-40 months of age at kidding, or does with 19-20 kg live weight at service, or at 4th parity. Season, location and parity also affected significantly (p<0.05) gestation length. Shortest gestation length was found in 5th parity or in summer season, whereas the longest was in 2nd parity or in winter season.

• 한국수정란이식학회지
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• 제14권3호
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• pp.195-201
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• 1999

This study was carried out to improve a technique of cloned animal prodcution by preactivation of nuclear recipient oocytes with ionomycin and 6-dimethylaminopurine (6-DMAP) in rabbits. The oocytes were collected from the oviduct of superovulated rabbit at 19∼20 hours post hCG injection. The collected oocytes were preactivated and self-enucleated by treating 5 uM ionoycin for 5 min, and 2.0 mM 6-DMAP for two hours. Microsurgical removel of the chromation complex in the second polar bodies was effectively performd and single blastomere separated from 32-cell stage rabbit embryos was injected into the perivitelline space of the enculeated recipient oocyts. Follwoing electrofusion and in vitro culture for 18 hours, the nuclear transplant(NT) embryos were transferred into the uterine horns of naturally mated or synchronized recipient does. When 32 NT embryous reconstituted with preactivated oocytes were transferred to 2 recipient does, one foster doe delivered two offspring (6.3%), while not a offspring was delivered from three foster does which received 17 NT embryos reconstituted with non-preactivated oocytes. A total of 68 NT embryos reconstituted with preactivated oocytes were transferred into the uterine horns of 7 synchronized ecipient does. Among them, two recipients were pregnant and delivered three offspring(5.9%).

• 수산해양교육연구
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• 제16권2호
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• pp.171-180
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• 2004

The purpose of the present study is to study how the understanding of growing of child to be related with recognizing the role of parents and activity of bringing up, and at the same time verifying a part of father through reviewing difference view with mother's. Object of investigation were 396 members of parents who have babies in infancy (177 members of fathers and 219 members of mothers. ). The result of this research shows that father has stronger confidence than mother in the role of parents relatively, but he does not understand as much as mother does in growing of child, and is not active enough in bringing up, keeps less intimate relationship with his child and does not affect on his child than mother does. And father who has more understanding on growing of child has also more positive activity in bringing up child. We can get one conclusion from this research, now a days it is seriously required for a father to participate more corporately in bringing up his child, we should do support more effort to let father gets better and right understanding in growing of child and building-up more effective and positive relation with his child.