• Title/Summary/Keyword: B13

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Kinemetic analysis of a thumping security motion with an expandable barton (경호원의 삼단봉 머리치기 동작의 운동학적 분석)

  • Kim, Yong-Hak;Kim, Sin-Hye;Jung, Sung-Bae
    • Korean Security Journal
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    • no.36
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    • pp.93-109
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    • 2013
  • This research is mainly based on the experimental result due to seek different outcomes whena certain security motion with a paticular gear is applied in a plausible confrontational situation. For the purpose of this research an Expandable Baton, which is one of the most commonsecurity equipments, was chosen to be applied in a situation of hitting a person's head. Alsothe results will be studied in the view of Kinematic theory. To demonstrate, 10 students who were majeored in Escort Crane studies at 'H' university werechosen as testees. The participants were grouped into two-one is practiced with the 'expanadable baton use program' and the other is pre-practiced. In this report two groups abovewill be reffered as 'group A' and 'group B' for conveniency. There were a number of differences and changes between two groups. Group B took more timethan the other group did. Group A spent about 0.428sec in section 'e2' and 0.230sec in section'e3' while Group B took 0.435sec, 0.232sec in each sections.To add on, more distinctive results were out when it was more focused on physical movements. Two gropus presented considerable changes- in an 'left-right' moving displacement-Group A;$2.16{\pm}0.9cm$ (left side), $3.78{\pm}1.42cm$ (right side), total $5.94{\pm}2.03cm$. Group B; $2.97{\pm}1.01cm$ (left side),$4.56{\pm}1.57cm$ (right side), total $7.53{\pm}2.13cm$.Continuously, different outcomeswere shown between two groups in a 'back and forth' moving displacement-Group A;$32.48{\pm}3.86cm$, $35.21{\pm}4.64cm$, total $69.36{\pm}5.72$. Group B; $34.50{\pm}6.12cm$, $37.04{\pm}3.70cm$, total $71.46{\pm}7.17cm$. Furthermore, changes in an 'up and down' moving displacement were - GroupA; $5.62{\pm}2.41cm$, $4.54{\pm}1.87cm$, total $10.11{\pm}1.57cm$. Group B; $6.33{\pm}1.78cm$, $4.86{\pm}1.85cm$,total $10.68{\pm}1.81cm$. To continue, there were few modifications of degree on participants' joints, espcially on 'Wristjoint', 'Elbow joint' and 'Shoulder joint', depend on different sections -Wrist joint;Group A; e1 $114.62{\pm}7.13$, e2 $68.27{\pm}6.37$, e3 $131.64{\pm}6.27$. Group B; e1 $112.62{\pm}6.13$, e2 $66.28{\pm}7.38$, e3$137.42{\pm}4.28$ and Elbow joint ; Group A e1 $132.31{\pm}6.55$, e2 $117.92{\pm}8.42$, e3 $144.41{\pm}6.32$. Group B; e1 $133.58{\pm}8.56$, e2 $114.45{\pm}8.21$, e3 $139.89{\pm}4.38$. Lastly, degree changes ofshoulder joint were; Group A; e1 $13.55{\pm}3.85$, e2 $131.42{\pm}11.24$, e3 $78.32{\pm}6.28$. Group B; e1$9.45{\pm}1.23$, e2 $136.74{\pm}13.21$, e3 $79.75{\pm}4.24$.

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COMPLETENESS OF A NORMED ALMOST LINEAR SPACE B(X, (Y,C))

  • Lee, Sang Han;Im, Sung Mo
    • Journal of the Chungcheong Mathematical Society
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    • v.13 no.1
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    • pp.79-85
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    • 2000
  • In this paper, we have an affirmative solution of G. Godini's open question ([3]): If a normed almost linear space Y is complete, is the normed almost linear space B(X, (Y,C)) complete?

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PERIODICITY ON CANTOR SETS

  • Lee, Joo-Sung
    • Communications of the Korean Mathematical Society
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    • v.13 no.3
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    • pp.595-601
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    • 1998
  • In this paper we construct a homeomorphism on a Cantor set which is nearly periodic such that h(a) = b for given a, b $\in$ D$_{p}$. We also give an example which is not almost periodic and we discuss when a homeomorphism on a Cantor set is periodic.c.

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Isoflavonoids of Belamcanda chinensis (II)

  • Eu, Gang-Hae;Woo, Won-Sick;Chung, Ha-Sook;Woo, Eun-Hee
    • Korean Journal of Pharmacognosy
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    • v.22 no.1
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    • pp.13-17
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    • 1991
  • Dimethyltectorigenin, irisflorentin, muningin and iristectorigenins A and B were isolated from the rhizomes of Belamcanda chinensis.

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On Exponential Utility Maximization

  • Chung, Kun-Jen
    • Journal of the Korean Operations Research and Management Science Society
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    • v.13 no.2
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    • pp.66-71
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    • 1988
  • Let B be present value of some sequence. This paper concerns the maximization of the expected utility of the present value B when the utility function is exponential.

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과학리포트 - 보이지 않는 비행기시대

  • Lee, Gwang-Yeong
    • The Science & Technology
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    • v.30 no.6 s.337
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    • pp.16-17
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    • 1997
  • 레이더에 탐지되지 않는 비행기 B2스텔스 폭격기가 미국서 4월부터 전투수행임무에 투입되었다. B2스텔스 폭격기의 가격은 1대당 4천7백억원. 현재 화이트먼 공군기지에는 13대의 스텔스가 배치되어 있는데 이중 6대가 미 국방부의 핵전쟁계획에 참여하고 있다.

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