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손세원(Sohn Se Won),이영재(Lee Young Jae) 한국지적정보학회 2005 한국지적정보학회지 Vol.7 No.2
본 연구는 임야불부합의 해결을 위한 방안으로서 임야도의 도면보존 상태를 기준으로 총 6등급으로 구분하고, 이를 토대로 상위등급 도면을 기준선으로 채택하여 하위등급 도면을 조정함으로써 임야불부합지에 대한 정비 방안을 모색하였다. 또한 그 결과에 대한 개별필지의 면적을 허용오차 면적과 비교ㆍ분석하여 실질적인 도입의 타당성을 검증하였다. All countries of the world have their various policies in order to solve the housing problems. One of the most stressed policies in these days, however, the public rental housing policy gives rise to a side effect such as social exclusion. For overcoming the problem, the housing voucher needs to get into operation more widely. The benefits of the housing voucher are as follows. First, the efficiency of a housing market could increase. Second, the freedom of moving can be guaranteed. Third, the proper function of housing filtering process would be maximized. Fourth, social mix would be led. Hence, the rent certificates needs to be carried out in parallel with the housing voucher for the purpose of solving the housing problems.
손세원(Se-Won Sohn),김희재(Hee-Jae Kim),김영태(Young-Tae Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Recently, high-performance hybrid composite materials have been used for various industrial fields<br/> because of their superior high strength, high stiffness and lower weight. In this study, manufactured hybrid<br/> composite materials are composed of two parts. One is hard-anodized Al5083-O alloy as a face material and<br/> the other is high strength aramid fiber (Twaron® CT709) laminates as a back-up material. Resistance to<br/> penetration is determined by protection ballistic limit(V50, a static velocity with 50% probability for complete<br/> penetration) test method. V50 tests with 0°obliquity at room temperature were conducted with 5.56mm ball<br/> projectiles that were able to achieve near or complete penetration during high velocity impact tests.
고속충격을 받는 Ti/Al 적층재의 파괴거동에 관한 연구
손세원(Se-Won Sohn),이두성(Doo-Sung Lee),홍성희(Sung-Hee Hong) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
In order to investigate the effect of face material on Ti/Al alloy laminates under high velocity impact, a<br/> ballistic testing was conducted. Ballistic resistance of these materials was measured by protection ballistic<br/> limit(V50), a statistical velocity with 50% probability penetration. Fracture behaviors and ballistic tolerance,<br/> described by penetration modes, were respectfully observed, by V50 test and Projectile Through Plates (PTP)<br/> test at velocities greater than V50. PTP tests were conducted with 0°obliquity at room temperature using<br/> 5.56mm ball projectile. V50 tests with 0°obliquity were also done with projectiles that were able to achieve<br/> near or complete penetration during PTP tests. Resistance to penetration, and penetration modes which face<br/> material was Titanium alloy, were compared to those which face material was anodized Al alloy after coldrolling.
손세원(Se Won Sohn) 한국자동차공학회 2005 한국 자동차공학회논문집 Vol.13 No.4
In order to investigate the characteristics of penatration and the effect of surface treatment in Al5052-H34, Al5082-H131 and titanium alloy laminates which were treated by anodizing and PVD(Physical Vapor Desposition) method, ballistic tests were conducted. Thickness of surface membrane in Al5052-H34, Al5082-H131, were 25㎛ and that of titanium 0.9㎛ respectively. Surface hardness test was conducted using micro Vicker's hardness tester. Resistance to penetration is determined by the protection ballistic limit(V50), a statistical velocity with 50% probability for complete penetration. Fracture behaviors and ballistic tolerance, described by penetration modes, are observed from the results of V50 test and Projectile Through Plate(PTP) test at velocities greater than protection ballistic limit, respectively. Present experimental results derived from this research help to optimize laminate impact behavior by varing the laminate thickness and surface treated materials.