전방막사의 단열개수로 인한 에너지 소비절감 효과에 관한 연구

金錫蜂 陸軍士官學校 1986 한국군사학논집 Vol.30 No.-

The purpose of this study is to compare the thermal and economic efficiency between the existing military barracks of frontal area and those which retrofitted on the basis of energy conservation. The results are as follows; 1) According to the standard design of combined military barracks of the Army, the K value of the roof is 0.520, the K value of the out-wall is 0.526. They are even below the national standard level of isolation of heat. Therefore in order to qualify the national standard level, the thickness of polystyrenefoam should be changed from 50mm of the present to 75mm. 2) In case of existing military barracks, the heat loss per each column which is attached to the outer-wall is 102 kcal/h. But in the barracks which are retrofitted, the heat loss can be lowered to 24kcal/h. 3) In case of existing military barracks, the heat loss between the wall and the slab of the first floor is 32,000 kcal/h in total. But if we retrofit the barracks, the heat loss can be diminished up to 25%. 4) If we retrofit the barracks, not only the isolation level of heat would satisfy the standard level but also the cost of heating might be decreased to a great degree. Also, Since the cost of retrofit would be returned in about three years, we can say it is economically efficient.

한국의 IPO 초과배정옵션

김석봉 한국재무관리학회 2018 財務管理硏究 Vol.35 No.1

It is expected that IPO underwriters engage in market stabilization to protect investors from volatile stock price movements post IPO. However, since the introduction of rules and regulations on IPO overallotment option in 2002, the establishment of IPO overallotment facility and the exercise of IPO overallotment option have never been popular in Korea. This study focuses on the background of why such issues emerge and aims to suggest the action plans. More specifically, this study further reviews why overallotment option is not active at all in Korea and identifies the issues in relation to the implementation of this option while aims to discuss various measures to remedy the problems. I expect these action plans will contribute to the activation of overallotment option which ultimately contributes to the enhancement of IPO price stabilization and investor protection. IPO 주관회사는 적정한 공모가의 산정뿐만 아니라 상장 후 주가의 안정을 통해 공모주 투자에따른 손실을 최소화할 수 있도록 사후적인 역할을 효과적으로 수행할 필요가 있다. 이를 위해 2002년국내에 도입된 IPO 초과배정옵션제도는 실제로 유명무실하게 운용되고 있는 실정이다. 제도의활성화를 위해서는 현행 IPO 초과배정옵션제도의 다각적인 검토와 원인 규명이 필요하다. 본 연구는시장조성활동의 활성화를 위한 정책적 방안을 강구하는 것에 초점을 둔다. 구체적으로 초과배정으로인해 발생한 순매도포지션의 해소를 위한 매수가격 결정방법, 공모주 수요예측 및 초과배정 방법, 초과배정 물량확보와 관련된 대안을 제안한다.

군시설의 화생방호설비 설계지침에 관한 연구

김석봉,김운영 陸軍士官學校 2002 한국군사학논집 Vol.58 No.-

제6장 미래 육군의 시설 발전방안

김석봉,백승민,이병인 한국전략문제연구소 2006 전투발전 Vol.- No.-

주요 통신시설의 생존성 보강대책 연구

김석봉 육군사관학교 화랑대연구소 2010 한국군사학논집 Vol.66 No.1

Primary telecommunication facilities of defense are constructed with reinforced concrete which is common in general purpose buildings. However, this type of structures are not safe enough against threats from conventional weapons, chemical, biological, and radioactive warfare, and EMP (electromagnetic pulse), survivability reinforcement that meets the objectives and the importance of the facilities is strongly demanded. In this research, therefore,the problems and improvement plans of the primary telecommunication facilities are suggested; among the structures that have the required protection capacity such as igloo type, protective wall type, above-ground-covered-with-soil type, and underground structures, the above-ground-covered-with-soil structure is considered most appropriate in the aspect of the protection capacity, economic efficiency, operability, and construction features.

유상증자 제도 개선방안

김석봉 한국재무관리학회 2017 財務管理硏究 Vol.34 No.1

현행 유상증자 제도가 악용되어 기존주주 및 외부투자자들이 피해를 보는 사례가 지속적으로 발생함으로 인해, 유상증자 제도 자체의 적법성보다 적절성에 대한 문제가 제기 되었다. 이러한 문제를 해결하기 위해서는 현행 유상증자 제도의 다각적인 검토와 원인 규명이 필요하다. 본 연구는 공매도 및 실권주로 인한 피해를 포함하여 유상증자 거래에서 반복될 투자자들의 피해에 대한 논란을 시장에서 불식할 수 있는 정책적 방안을 강구하는 것에 초점을 둔다. 구체적으로 적정한 발행가격 산정을 포함한 유상증자 제도 개선방안을 논한 후, 공매도 및 실권주로 인한 피해를 줄이는 방안을 제안한다. Individual investors have been suffering losses from either short sale activities prior to seasoned equity offerings or bending current regulations on seasoned equity offerings. This study focuses on the background of why such issues emerge and aims to suggest the action plans. More specifically, this study further reviews how issuers take advantage of current regulations on seasoned equity flotation methods and seasoned equity offering price determination mechanism while aims to discuss various measures to remedy the problems. I expect these action plans will contribute to the reduction of excessive new share price discount and the mitigation of impact from short sale activities.

침투시험에서의 콘크리트 표적크기 영향 분석

김석봉,유요한,Kim, Seokbong,Yoo, Yohan 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.2

This paper deals with the effect of concrete target size on penetration of projectiles. We investigated the penetration depth and residual velocity of projectiles using the 2-D axial symmetric model. Most analysis were conducted with 13 kg projectile (striking velocity: 456.4 m/s) and concrete target with compressive strength of 39 MPa. This paper provided penetration depth (or residual velocity) versus ratio D/d (target diameter, D and projectile diameter, d). When the bottom of concrete cylinder was constrained, penetration depth converged to limit depth more than the ratio D/d of 36. The residual velocity of projectile with thin concrete target were investigated. The residual velocity was converged to specific velocity more than the ratio D/d of 16.

탄두 충돌 시 기폭관 컵의 변형 해석

김석봉,유요한,Kim, Seok-Bong,Yoo, Yo-Han 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.4

In this paper, we have investigated deformation of cup for EFI detonator in high velocity impact test. The experimental result shows that STS cup deformed 0.170 mm with the bulged shape. The numerical simulation result with static/dynamic material properties of SUS304 shows 0.166 mm of deformation. The main parameters to decrease the deformation of cup are stength, thickness and density of cup. The initial condition of SUS304 cup was strength of 215 MPa and thickness of 0.12 mm. As strength increases to 500 MPa, deformation of cup converges to 0 mm, and as thickness increases to 0.18 mm, deformation of cup converges to 0 mm. If the density of cup decreases from 8 to 2.7 g/cc, the deformation of cup decreases to 0.141 mm.

탄두의 콘크리트 관통 시 스케일 영향

김석봉,이창수,유요한,Kim, Seokbong,Lee, Changsoo,Yoo, Yohan 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.2

This paper deals with the scale effects of warhead on concrete penetration. We investigated the scale effects using finite element analysis and Young's penetration equation. As the scale of penetration test decreases, the strain rate effects of target increases, and then strength of concrete target increases. This means the residual velocity and penetration depth of warhead decreases as the test model size decreases. Young's penetration equations are transformed with various penetrator mass and scale cases as a function of scale ratio. Penetration distance and residual velocity are not simply changed by the geometric scaling law.

군시설 적정 유지보수비 산정 ( The Determination of Optimal Maintenance Cost for Military Facilities )

김석봉 대한건축학회 2000 大韓建築學會論文集 : 構造系 Vol.16 No.8