• Journal of Advanced Marine Engineering and Technology
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• v.23 no.6
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• pp.778-784
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• 1999

In this study both the experimental and the analytic approach to find load characteristics on the cam-valve mechanism for matrine diesel engine were demonstrated. The experiment was per-formed with a test rig consisted of real engine components for cam-valve mechanism of overhead valve type. The 9-degree of freedom lumped mass model was developed to simulate cam-valve motion throughly. Behavior of the load acting on the cam-valve mechanism was estimated for the various cam speed. The load variation was getting deeper with the higher cam speed and the jumping of the follower was shown both in the experiment and in the simulation.

• Journal of the Korean Society for Precision Engineering
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• v.24 no.2 s.191
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• pp.64-72
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• 2007

Many human-body motions such as walking, running, jumping, etc. require a significant amount of power. To achieve a high power-to-weight ratio of the humanoid robot system, this paper proposes a new design of the bio-mimetic leg mechanism resembling musculoskeletal system of the human body. The hip joints of the system considered here are powered by 5 human-like bi-and mono-articular muscles, and the joints of knee and ankle are redundantly actuated by both bi-articular muscles and joint actuators. The kinematics for the leg mechanism is derived and a kinematic index to measure force transmission ratio is introduced. It is demonstrated through simulation that incorporation of redundant muscles into the leg mechanism enhances the power of the mechanism approximately 2 times of the minimum actuation.

• Journal of Ginseng Research
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• v.16 no.1
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• pp.13-17
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• 1992

The present experiments were performed to investigate the effects of the ginseng total saponin on the development of physical dependence on morphine via intracerebroventricular (i.c.v) route. Morphine (10 $\mu\textrm{g}$/${mu}ell$/hr) was continuously infused via osmotic minipumps into lateral cerebral ventricle of male Sprague Dawley rats for 7 days. Concurrent ginseng total saponin (100, 200 $\mu\textrm{g}$/10${mu}ell$/hr) was infused intraperitoneally (i.p) via osmotic pumps for 7 days. Treatment with ginseng total saponin (200$\mu\textrm{g}$/10${mu}ell$/hr) significantly diminished jumping, teeth chattering, hypothermia and weight loss precipitated by naloxone, compared with those animals received only morphine infusion. These results suggest that ginseng total saponin has central effect on the inhibition of physical dependence on morphine, as systemic ginseng total saponin inhibits the development of physical dependence in rats infused with morphine intracerebroventricularly.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.15 no.4 s.97
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• pp.445-451
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• 2005

This paper is the result of a experimental study about non-linear one to one modal coupling of a flexible circular cantilever beam which was transversely excited with harmonic excitation. It was proved that 2 order jumping in out of plane was caused by jump phenomenon in in-plane of flexible circular cantilever beam, because of non-linear coupling. In addition, cantilever beam showed hardening spring characteristics in in-plane and softening spring characteristics in out-of-plane.

• Korean Journal of Child Studies
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• v.24 no.6
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• pp.133-146
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• 2003

This study examined the songs and play-games of youngsters who escaped from the North and came to South Korea. The 5 female and 1 male participant mostly entered South Korea through Chinese, Viet Nam and Cambodia after escaped from the North. Through individual interviews, the researcher collected 31 North Korean songs and 21 play-games. Themes of songs were devotion their's country and/or their's national leader, a television serial drama and such traditional play-songs as komojul-nomki(jumping the rubber rope). Data from the collected songs and play-games indicated similarity between South and North Korea; both North and South Korean children liked a television serial drama songs and both sides played similar games, through sometimes the name was different.

• Korean Journal of Health Education and Promotion
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• v.28 no.5
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• pp.73-82
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• 2011

Objectives: This study is to gain an understanding of the characteristics of suicides committed by university students in Korea by assessing news reports. Methods: A total of 97 news reports on university student suicides on daily newspapers and TV newscasts from 2000 to 2011 are included in this study. Analyses were performed on sociodemographic characteristics of suicided university students and temporal and other characteristics of the suicides. Results: Suicide rate was higher among males than females. The most frequently used method of suicide was jumping off while the most common place was the students’ residence. Issues related to academic and financial problems topped as the reasons for suicide. There were no differences in the reasons for committing suicide by school year and enrollment, but the location and season of committing suicide differed by reasons for suicide. Conclusions: Implication of this study, discussion on the results and suggestions for suicide prevention are discussed.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.29 no.9 s.240
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• pp.1191-1198
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• 2005

This paper is concerned with the numerical investigation of the landing impact characteristics of sport shoes to the landing mode. In most court sport activities, jumping and landing are fundamental motions, and the landing motion is largely composed of forefoot and rearfoot landing modes. Since the landing impact may, but frequently, lead to unexpected injuries of players, the investigation of its characteristics and the sport shoes design for reducing it are of a great importance. To investigate the landing impact characteristics to the landing mode, we construct a shoes-leg coupled model and carry out the numerical simulation by an explicit finite element method.

• KIEAE Journal
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• v.3 no.4
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• pp.23-31
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• 2003

From 1998, the number of household who live in apartment house outnumber that of household live in detached dwelling by 0.3% in Korea. As walls and floors are shared with neighbourhood in apartment houses, percent complaints to the impact noise from the upper floor was so high that it represents an important factor in apartment indoor noise. And the rate is closely correlate with children's running, playing and jumping. In this study, comparisons of standard impact source, such as Tapping Machine and Bang Machine, with real life impact sources were made in order to investigate acoustical characteristics between them. Also reproducibility tests for impact sound sources were carried out.

• Journal of Animal Science and Technology
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• v.55 no.6
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• pp.559-565
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• 2013

This study examined the effect of therapeutic horseback riding in children with spastic cerebral palsy. Participants were placed in a therapeutic riding (TR) group (n=7) or physical therapy (PT) group (n=7). This study was then conducted for 30 minutes, twice a week, for 8 weeks. The gross motor function measure (GMFM), range of motion (ROM), and spasticity test (ST) were analyzed pre-test (TR0 and PT0), mid-test (TR1 and PT1), and post-test (TR2 and PT2). We used the SPSS 12.0 statistical software for data analysis. We observed significant changes in GMFM Dimension C (crawling and kneeling), D (standing), and E (walking, running, and jumping) between TR2 and TR0 (P < 0.05). In the control group, GMFM Dimension B (sitting) and E showed significant changes between PT2 compared to PT0 (P < 0.05). In future studies we will consider using a therapeutic riding program for the treatment of children with disorders.

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.385-386
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• 2013

키네시오 테이핑은 일반 테이핑과 함께 다양한 분야에서 쓰이고 있으며 그 효과에 대한 연구 또한 다양하게 진행되고 있다. 우리는 키네시오 테이핑과 테이핑이 제자리 점프 시 발목 관절의 균형에 어떠한 영향을 미치는가를 알아보기 위해 다음의 실험을 고안하였다. 11명의 피험자에게 제자리 점프 시 발목관절의 움직임을 맨발, 테이핑 적용, 키네시오 테이핑 적용후로 나누어 시상면의 각도 변화를 통해 평가하였다. 테이핑은 근피자극효과에 초점을 맞추어 발목 관절의 움직임을 제한할 정도로 적용하지는 않았다. 그 결과 키네시오 테이핑과 테이핑 모두에서 줄어든 각도 변화가 관찰되었으나 유의한 차이값을 보여주지는 않았다. 그러므로 키네시오 테이핑과 테이핑(근피자극효과)이 발목관절의 안정성에 효과가 있는지에 관한 문제는 추가적인 연구가 필요할 것으로 보인다.