• KDI Journal of Economic Policy
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• v.10 no.2
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• pp.65-90
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• 1988

본고(本稿)는 정책행태(政策行態)에 대한 정치경제학적(政治經濟學的) 접근방법(接近方法)을 이용하여 지금까지 우리나라의 시장개방(市場開放)에 대한 수요(需要) 공급(供給) 및 실제시장개방(實際市場開放)의 결정요인(決定要因)을 실증적으로 분석하고 이를 바탕으로 시장개방정책(市場開放政策)의 행태(行態)를 분석하였다. 로짓분석(分析)에 의한 실증분석결과는 정치경제학적(政治經濟學的) 접근방법(接近方法)의 타당성을 강하게 지지하는 것으로 나타났으며, 이 결과에 의하면 우리나라의 시장개방정책(市場開放政策)은 경제원칙(經濟原則)에 입각하여 추진되었다는 측면을 완전히 배제할 수는 없지만 정치경제학적(政治經濟學的) 요인(要因)들-국내이해관련집단들의 자기비호(自己庇護) 주장(主張)이나 미국(美國)의 개방압력(開放壓力) 등-에 의해 왜곡(歪曲)되었던 것으로 나타났다. 특히 '공정무역(公定貿易)'의 기폭하(旗幅下)에 가해지고 있는 미국(美國)의 개방압력(開放壓力)은 오히려 미국기업(美國企業)들의 이해관계(利害關係)를 대변함으로써, 그리고 국내이해관련집단의 관심을 고조시킴으로써 시장개방(市場開放)의 합리적(合理的) 원칙(原則)의 견지를 더 어렵게 하였던 것으로 관찰되었다. 또한 분석결과(分析結果)에 이하면 금후의 경제민주화(經濟民主化) 추세(趨勢)의 진전(進展)으로 개방정책(開放政策)을 포함하는 일반경제정책(一般經濟政策)의 입안(立案), 추진(推進)에 있어 이해관련집단들의 역할이 증대될 것이기 때문에 이는 자칫하면 정책방향(政策方向) 왜곡(歪曲) 및 집행(執行)의 효율성(效率成) 저하(低下)를 초래할 수도 있다는 시사를 주고 있다.

• Journal of the Korean Society of Propulsion Engineers
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• v.21 no.4
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• pp.36-43
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• 2017

We studied attenuation characteristics of shock waves induced by a donor charge and the sensitivity of an acceptor for optimal design of a TBI (Through-bulkhead initiator). The attenuation behavior of shock waves was studied by measuring free surface velocity using a VISAR (Velocity Interferometer System for Any Reflector), and the sensitivity of the acceptor explosives was analyzed via SSGT (Small Scale Gap Test). It was found that the acceptor sensitivity obtained by the SSGT may be inappropriate for the design of the small-scale explosive devices such as TBI due to the different shock duration time.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.05a
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• pp.129-132
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• 2010

The objective of IM rocket motor is to minimize the probability of inadvertent initiation and severity of subsequent collateral damage, hence it is important to define personnel and equipment survivability to a rocket motor accident. The violent response probability associated with shock, impact and thermal effects be minimized. And during production, transportation/storage and stack of rocket motor, sympathetic detonation, giving severe effects of the propagation of adverse reaction on its surroundings, be reduced. Hence Reaction type also based on reaction results of the overpressure, fragment throw and heat flux.

• Explosives and Blasting
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• v.24 no.2
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• pp.23-31
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• 2006

Optimum additive which gets Possible detonation sensitivity and minimum stability has been selected among several additives. It is able to mitigate a chemical reaction without destroying a structure of emulsion. Kinecker has been developed by mixing both matrix and selected additive through a perfect formulation. The detonation pressure is reduced by 40.66%(47.27% by Nitro Dyne's program), and hole pressure by 33.25% and even VOD by 52.88% against currently used emulsion explosives.

• Journal of the Korea Institute of Military Science and Technology
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• v.16 no.4
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• pp.493-500
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• 2013

In this study, it was evaluated the protective performance of the protection material for filed of the army by impact of fragment from the explosion of 155mm artillery shell to propose the improvement items. And it was evaluated the protection materials for structural boby such as corrugated steel plate, concrete block, prevention paint of explosion, aluminum foam and concrete T-wall by impact of fragment of 155mm artillery shells and explosion-induced pressure of C-4 explosive. As a result, protective performance of the existing protective material was superior but reinforcement is necessary for secondary damage because sand is leaking. The protective performance of new protective materials was greater than existing protective materials. And it can be used for protective materials.

• 한국벤처창업학회:학술대회논문집
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• 2022.04a
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• pp.11-15
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• 2022

한국은 전 세계에서 미국에 이어 두 번째로 인터넷 연결에 성공한 나라가 되었고 1990년대 후반에는 세계 최초로 초고속 인터넷이 도입, 개발되면서 많은 닷컴기업들이 등장하였다. 이렇게 인터넷을 기반으로 한 비즈니스들이 출현하고 '인터넷 혁명'이라 불릴 정도로 사회, 경제적 변화가 일어났으나, 인터넷 비즈니스 역사에 대한 연구는 매우 제한적이다. 본 연구는 인터넷 비즈니스의 역사에 대해 다양한 개별 기업의 역사연구를 수행한 후, 비교를 통해 설명 변수를 발견하고 이를 통해 이론을 발견하는 경영사적 연구접근 방법을 소개하고자 한다. 구체적으로 본 연구는 귀납적 접근방법을 기초로 1990년대 말, 2000년대 초의 이른바 창업자, 벤처 관련 인사들의 인터뷰 및 문헌연구를 진행하였다. 스타트업 역사 상 의미가 큰 기업으로 메디슨, 큐닉스, 새롬기술, 다음, 네이버, NC소프트, 넥슨에 대한 내용을 정리 중이다. 이 기업들은 공통적으로 새로운 기술 도입을 기회로 삼아 가치를 창출하여 사회를 바꾸려하는 기업가정신을 추구하고 있었다. 또한 인터넷 인프라를 기민하게 활용하였으며 1997년 말 외환위기로 인해 인재와 자금이 벤처로 이동한 환경적 변화가 성장의 기폭제가 되었다. 또한 코스닥을 통한 자금조달 등은 벤처기업들의 시장기회를 확대하고 성장에 기여를 하였으며 자율적이고 유연한 기업문화에 형성하며, 대학가에 창업 붐을 일으키기도 하였다. 제 2벤처붐이 도래한 이 시점에 벤처기업에 대한 귀납적 방법론을 활용한 경영사적 관점의 지속적 연구가 필요하다.

• Explosives and Blasting
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• v.29 no.2
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• pp.1-12
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• 2011

Progressive collapse analyses of high-rise buildings subjected to abnormal loading such as fires, impacts, earthquakes, typhoon, bomb blasts etc. are intended. However it is difficult to perform collapse experiments of the real scale building to determine the capacity of the structure under an extreme loading events. In this study, collapse behavior of a 15 story RC structure building loaded by external explosion pressures were simulated using Extreme Loading Structures (ELS) software. The standoff distance between the RC building and explosives of 1500 kg was 1, 2, 5, 10, and 15 meters. The explosive demolition analysis techniques based on removal of partial support structures following blast scenario was adapted to investigate the transition process of progressive collapse-local damage.

• Journal of the Korean Applied Science and Technology
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• v.32 no.2
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• pp.290-295
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• 2015

The purpose of this study is to separate nitrocellulose from 175 mm ammunition propellant by environmentally responsible recovery method. Recovery of nitrocellulose from obsolete ammunition is much more desirable than destruction since it can be reused in the several purpose. In spite of durable demilitarization of obsolete ammunition, the current holding amount of obsolete ammunition is gradually increasing and accumulated. The existing demilitarization methods, such as incineration and priming are strictly restricted for the noise, dust, oscillation and air and soil pollution. This study is focused on the separation of nitrocellulose by environmentally responsible recovery method by the solubility difference of nitrocellulose in nonpolar solvent. The purity of an extracted nitrocellulose was analysed by IR and TLC method and was clarified as very high.

• Explosives and Blasting
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• v.34 no.1
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• pp.11-18
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• 2016

It is necessary to minimize ground vibration and noise due to blasting work in urban environment. The blast induced ground vibration and noise are generally generated by a portion of detonation energy, where most of the energy is utilized for rock breakage and movement of rock mass. Recently a blast method utilizing U-shaped steel charge holder was suggested to reduce the ground vibration without decreasing destructive power toward the free surface. In this study, single hole blasting utilizing U-shaped steel charge holder were simulated and the stress waves caused by the detonation of explosives were monitored using AUTODYN software. In order to examine the fragmentation efficiency of the U-shaped steel charge holder, one free face blasting models which adapt the blast induced stress waves were simulated by dynamic fracture process analysis (DFPA) code. In addition, the general blasting models were also simulated to investigate the fragmentation effectiveness of the U-shaped steel charge holder in rock blasting.

• Explosives and Blasting
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• v.28 no.2
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• pp.37-49
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• 2010

Ground vibration caused by blasting in the urban area close to structures can give some indirect damage to human body and may lead to structural damage to buildings. At the stage of design or when complaints were filed by residents, the test blasting in borehole, which is most practical for expressing simple vibration wave form quantitatively, is usually chosen for assessing the degree of damage to structures. In this paper, some lessons gained from the application of electronic detonator triggering system in borehole test blasting are presented. The difference in delay time of detonator when borehole is blasted by electronic detonator and electric detonator are discussed. The peak particle velocities measured at the structure embedded in the similar rock layer to main line of tunnel at test site and measured at the road surface just above the tunnel having different overburden layers were analysed to draw their relationship. By comparing the results with those appearing in some published literatures, the usefulness of the borehole test blasting and the importance of delay time of detonator are addressed.