• Journal of the Korea Institute of Military Science and Technology
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• v.19 no.3
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• pp.339-345
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• 2016

This paper is concerned with the numerical simulation result of pressure propagation to the main charge by warhead penetration into concrete targets. In this study, we developed on-line pressure measurement method in the main charge during warhead penetration. Using the on-line pressure measurement method, we successfully recorded the pressure-time history in the main charge during the field penetration test. Then we compared result of numerical simulations with test data and found that the simulation results are in good agreement with the test results. Finally, through the numerical calculations it is concluded that the installation of liner is effective in reducing pressure level produced in the main charge.

• 핵융합뉴스레터
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• s.48
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• pp.26-26
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• 2010

KSTAR 개발사업의 마지막 단계는 약 6년에 걸쳐 수행되었으며 이 기간 동안 KSTAR 장치의 주장치 부분이 모두 설치되었다. 마지막 단계의 주요 과제는 크게 저온용기 내부에 설치되는 주장치 부분과 저온용기 외부에 설치되는 시스템으로 분류된다. 저온용기 내부 시스템은 저온용기와 진공용기, 열차폐체 등으로 구분된다.

• Journal of the Korean Arthroscopy Society
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• v.2 no.1
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• pp.15-20
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• 1998

Less has been written about the PCL than the ACL. There has, however, been an increasing amount of the interest in the PCL recently. Surgical reconstructions using grafts are often performed. However, these procesures often fail to provide long-term stability and function. Graft attachment sites are critical determinants of success in the PCL reconstruction. The clinical literature contains conflicting recommendations for graft attachment sites. We present a review of the isometry of the PCL.

• Proceedings of the KGS Conference
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• 2002.11a
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• pp.91-95
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• 2002

한반도에서 이루어진 해면변동 연구에 의하면, 최종빙기 최성기인 약 20,000~18,000년 BP 경에 해면은 현재보다 약 140m 정도 아래에 있었고, 이후 급하게 상승하는데, 상승 패턴의 특징, Holocene 동안 현재 해면보다 더 높았던 시기가 있었는가의 유무, 해면이 현재 수준에 도달하는 시기에는 서로 다른 두 가지 주장이 있다.(중략)

• The Science & Technology
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• v.32 no.2 s.357
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• pp.16-17
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• 1999

미국 정부는 화이자에서 개발한 임포치료 복용약 '비아그라'의 판매를 공식 승인했다. 그 후 비아그라는 전 세계에서 폭발적인 인기 속에 판매되었지만 이 약을 복용한 사람중 60여명의 사망자가 발생했다. 아무리 좋은약이라도 피해가 있다면 사전예방에 최선을 다해야 하겠다.

• Korean Journal of Logic
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• v.11 no.1
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• pp.33-65
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• 2008

최근에 양은석은 "비트겐슈타인과 초일관성: 비트겐슈타인의 반실재론"에서 모순에 대한 비트겐슈타인의 견해에 대해 매우 주목할 만한 주장을 하였다. 그에 따르면, 비트겐슈타인은 약한 의미의 초일관주의자로 간주될 수 있다. 이 글에서는 이러한 양은석의 주장이 설득력 없는 것임을 보이고자 한다. 또한 비트겐슈타인이 논리학과 수학, 그리고 모순을 어떻게 바라보았는지를 가능한 한 공정하게 조명하고자 한다. 여러 학자들은 모순에 대한 비트겐슈타인의 생각이 대단히 특이한 것이라고 간주하였고, 더 나아가 마치 어떤 중대한 오류를 포함하는 것처럼 평가하였다. 그러나 이제 이러한 평가는 더 이상 유효하지 않다. 모순과 관련된 비트겐슈타인의 생각은 더 이상 특이하지 않다. 왜냐하면 그의 생각은 옳기 때문이다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.441-444
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• 2011

Type A and Type B and are commercial HTPB models, which are very popular prepolymer for polyurethane binder family. So the study has been performed on the physical, chemical characteristic of HTPB and viscosity, mechanical property of PBX-A applying to HTPB. But We excluded the Type A from Appication test, because of law Hydroxyl value. And in the case of Type B, Type B-1, 2 has mechanical disadvatage to apply to HTPB in the process comparing with B-3. It seems to make no problem if we change equivalence ratio or curing condition within standards. But if we are to apply process condition like R-45HT(US-sample), it would be essential to apply HTPB with higher Hydroxyl Value and hydroxyl Functionality.

• Journal of Digital Convergence
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• v.17 no.4
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• pp.345-353
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• 2019

The purpose of this study was to explore effects of acceptance-­commitment therapy on assertiveness and interpersonal anxiety of university students with interpersonal anxiety. Twelve students are selected of three hundred thirty students who completed an assertiveness sacle and a social anxiety scale, and finally six students were assigned to an experiment group and the others to a control group. ACT program consisting of 8 sessions twice a week approximately 120minutes is provided for experiment group, on the other hand, nothing is provided for control group. All participants completed an assertiveness sacle, a social anxiety scale at pre-­test, post-­test, and 6 weeks follow­-up periods. In the experimental group, the assertiveness score was improved after ACT program but not in the control group. The improvement observed in the experimental group was maintained until the follow-­up test. In the anxiety test, the experimental group showed a larger decrease than the control group, and the difference was also found in the follow­-up test. Finally, the implications and limitations of this study, along with suggestions for future study were discussed.

• Korean Journal of Logic
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• v.15 no.2
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• pp.273-294
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• 2012

In my previous article "An Inferentialist Account of Indicative Conditionals" and "An Inferentialist Account of Indicative Conditionals and Hasuk Song's Objections", I argued that the so-called Uncontested Principle is not uncontestable. According to the Uncontested Principle, an indicative conditional '$A{\rightarrow}C$' logically implies a material conditional '$A{\supset}C$'. In his recent paper "On the Recent Controversies surrounding the Uncontested Principle" Wonbae Choi presents three objections to my claim. First, my denial of the Uncontested Principle implies rejecting modus ponens. Second, my denial of the Uncontested Principle is tantamount to taking the truth-conditions of an indicative conditional as weaker than those of a material conditional, which are usually taken to be the weakest among conditionals. Third, my view that we can warrantedly assert '$A{\rightarrow}C$' even when 'A ${\therefore}$ C' is inductively justified is based on a misunderstanding of the way in which indicative conditionals are justified. In this paper I argue that Choi's objections are all based on misunderstandings of my view. First, I do not deny the validity of modus ponens (as a form of deductive reasoning). Second, the fact that the inductive warrantability of 'A ${\therefore}$ C' does not imply the truth of '$A{\supset}C$' does not show that the truth-conditions of an indicative conditional is weaker than those of a material conditional. Third, Choi's claim that a contingent conditional '$A{\rightarrow}C$' is true only when 'C' can be deductively derived from 'A' in conjunction with a hidden premiss is not well grounded, nor does it fit the facts.

• Defense and Technology
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• no.6 s.124
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• pp.50-55
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• 1989

미국의 방산물자 수입비율을 검토하는 것은 "심한 불균형"현상을 연구하기 위한 것이다. 미국의 연간 구매는 10여개국으로부터 약 50억불 정도이나 수출은 구매액의 2배 정도가 된다. 일부 경제분석가들은 이것이 성공적인 재정적 업적이라고 주장하기도 하지만, 다른 일각에서는 이러한 현상이 미국에 해를 끼쳐왔다고 말하고 있다