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      • KCI등재

        초음파 C-Scan을 이용한 구조용 세라믹스의 기계적 특성평가

        장영권 韓國非破壞檢査學會 1989 한국비파괴검사학회지 Vol.9 No.2

        Computer-aided high frequency ultrasonic is applied to aluminum oxide(85w%, 94w%, 96w% and 99w%) MOR(modulus of rupture) samples to evaluate mechanical properties such as density variation, pore content, elastic modulus, shear modulus, and poisson's ratio. Ultrasonic wave velocity and attenuation measurement techiniques were used as an evaluator of such properties. Pulse-echo C-Scan images with different gate setting method using 50MHz center frequency 1 inch focal length transducer allows evaluation of density variation and pore content. Elastic modulus calculated with the relation of density and ultrasonic velocity. It shows good reliability as compared with resonance method. Sintered density variation of 0.025g/cm ³, that is 0.6% of theoretical density in Al₂O ₃samples can be observed by ultrasonic velocity mearsurement. Attenuation measurement method qualitatively agree with 4-point fracture testing result concerning of porosity content.

      • KCI등재
      • 超音波 C-Scan을 利用한 構造用 세라믹스의 機械的 特性評價

        장영권,백영남 慶熙大學校 材料科學技術硏究所 1989 材料科學技術硏究論集 Vol.2 No.-

        Computer - aided high frequency ultrasonic is applied to aluminum oxide (85w%, 94w%, 96w% and 99w%) MOR (modulus of rupture) samples to evaluate mechanical properties such as density variation, pore content, plastic modulus, shear moudlus and poisson's ratio. Ultrasonic wave velocity and attenuation measurement techniques were used as an evaluator of such properties. Pulse-echo C-Scan images with different gate setting method using 50㎒ center frequency one inch focal length transducer allows evaluation of density variation and pore content. Elastic modulus calculated with the relation of density and ultrasonic velocity. It shows better reliability as compares with resonance method. Sintered density variation of 0.025g/㎤, that is 0.6% of theoretical density in Al_(2)O_(3) samples can be observed by ultrasonic velocity measurement. Attenuation measurement method qualitatively agree with 4-point fracture testing result concerning of porosity content.

      • KCI등재후보

        초음파법에 의한 폭발접합 이종금속 접합품질 판정레벨 설정에 관한 연구

        장영권,백영남 대한용접접합학회 2001 대한용접·접합학회지 Vol.19 No.1

        An ultrasonic test method, as a nondestructive test is applied to ensure the clad interface quality assessment. According to the reference codes and standards, not only korea Industrial Standard(KS) but also American Society for Testing and Materials (ASTM) Standard, ultrasonic examination procedures use the pulse-echo, A-scan, back reflection signal drop method and/or side drilled reference hole used to establish the acceptance criteria of clad material test. But the variety of bonding materials and sizes makes it difficult to produce the reference blocks, or thus the criteria. In order to overcome these practical difficulties, new ultrasonic testing criterion is suggested. In this new method, the theoretical interface reflection signal amplitude level is calculated and suggested as an acceptance criteria with the back reflection signal set to 100% FSH(Full Screen Height) which is based on acoustic impedance mismatch at the clad interface for the explosive clad ultrasonic inspection. Applicability of suggested criterion, for the explosive clad Fe-Naval Brass with different bonding quality is confirmed to the pre-existed KS and ASTM specifications and verified by using SEM (Seanning Electron Microscope) micrograph. The results obtained by the suggested method is more conservative than the results according to the KS B 0234 and ASTM A 578 specifications The suggested method could be applicable to any other combination of explosive clad ultrasonic inspection.

      • KCI등재

        남한과 북한의 평화통합을 위한 교류협력에 관한 연구

        장영권(Young Kwon Jang) 한국사회정책학회 2005 한국사회정책 Vol.12 No.1

        본 논문은 남한과 북한의 교류와 협력은 전쟁방지와 남한과 북한의 평화통합에 있다고 보고, 지속 가능한 평화의 실현이라는 시각에서 접근하여 집필되었다. 한반도의 전쟁방지와 남한과 북한의 통합을 통한 지속 가능한 평화를 구축하기 위한 평화의 개념을 재정의할 필요가 있다. 즉, 평화의 개념을 단일한 의미가 아닌 `복합체적` 의미로 고찰해야 한다. 복합체적 의미의 평화란 `인권·자유·정의와 같은 원리에 따라 개인의 삶의 질이 보장되고 인류공동체의 공동번영을 위하여 국가간에 경제적 이익과 문화적 가치 추구에 따른 갈등, 정치적 주권침해와 군사적 위협, 착취와 이를 위한 폭력(전쟁)이 없는 상태`이다. 따라서 지속 가능한 평화는 정치군사평화, 경제평화, 문화평화가 조화를 이룬 상태이고, 이러한 평화를 추진해가는 지역내 국가군을 이루는 복합체적 집성체 또는 복합체적 동학을 특히 `평화복합체(peace complexes)`라고 한다. 한반도 지역의 평화복합체에 속한 남한과 북한의 정치군사평화, 경제평화, 문화평화의 확대를 위한 교류협력은 남한과 북한의 평화통합을 촉진시켜 한반도 긴장완화와 평화안정, 나아가 동북아시아 지역의 안정과 복지번영공동체 구상 실현에도 크게 기여한다. 그러므로, 남한과 북한의 평화통합을 위해서는 정치·군사적, 경제적, 문화적 평화확대를 위한 측면에서 교류협력을 강화해야 한다. 평화의 조건인 정치군사평화, 경제평화, 문화평화에 있어서 우선순위는 경제평화, 문화평화, 정치군사평화라고 할 수 있지만 동시에 평화복합체적으로 추진해야 효과를 극대화할 수 있다. 따라서 지속 가능한 남북평화를 구축하기 위해서는 교류협력을 통해 상호 인정과 존중이라는 평화공존 의식을 갖고 공동번영을 할 수 있는 평화복합체적 평화공동체를 지향해야 한다. This thesis discusses Korea the realization of sustainable peace and is written from the point of view that interchange and cooperation between South Korea and North Korea would prevent the war and promote Peaceful Integration. It is needed to redefine the concept of peace constructing sustainable peace through South-North integration and war prevention in Korea Peninsula. That is, the concept of peace should be considered as complexes meanings instead of simple meaning. Peace complexes means that `Individual`s quality of life is secured according to principle such as human rights, freedom and justice, and for common prosperity of mankind community between the countries` economic profit and conflict by cultural value pursuit, political infringement of sovereignty and military threats, exploitation and no violence status`. Peace Complexes concept means that sustainable peace is possible when 3 complexes conditions (paths) of peace, which are, politic-military condition, economic condition, and cultural condition are accomplished. That is, conditions of peace by concept of sustainable peace are typified by politic-military peace, economy peace and culture peace. Therefore, sustainable peace is state that harmonizes politic-military peace, economic peace and cultural peace accomplish creation, and complex conglomerate or complex dynamic study which forms a belt of countries in the area by propelling this peace is called especially `Peace complexes`. The Peace complexes Theory has a proposition that Peace is materialized through inter-countries complexes paths (conditions), and is also Peace Integration Theory which shows that the most proper scale is regional level and complexes area on its theoretical basis. Inter-Korean cooperation for extension of politic-military peace, economy and culture peace of South and North Korea belonging to peace complexes of Korea Peninsula area, promotes peace integration of South Korea and North Korea, furthermore, contributes greatly for Korea Peninsula detente, Northeast Asia area stability and realization of welfare prosperity community. Therefore, to achieve peaceful integration between South and North Korea it should strengthen inter-Korean cooperation with a view to keeping political-military, economical, cultural peace extension. Priority can be given economic peace, culture peace, politic-military peace among in politic-military peace, economic peace, cultural peace that is 3 conditions of peace, however, it can maximize effect when we pursuit by means of peace complexes. at the same time. And it can be said that the most important thing is cultural peace for the sake of South and North Korea`s peace integration. If this is not attained properly, structure of peace integration would be vulnerable. Because and this nitrification of ideology and value can threaten politic-military peace and finally harm economic peace. Therefore, it should intend toward peaceful peace complexes community with peaceful coexistence consciousness which is mutual respect and recognition making common prosperity in order to construct sustainable South-North peace.

      • KCI등재후보

        평화의 존재론적 의미와 구축 전략: 한반도 "DMZ평화" 구상을 중심으로

        장영권 ( Young Kwon Jang ) 서울대학교 통일평화연구원 2015 통일과 평화 Vol.7 No.1

        평화가 중간에 파기되지 않고 지속되기 위해서는 어떻게 해야 할까? 이를 위해서는 ‘평화의 존재적 의미’에 따라 접근할 필요가 있다. 평화의 존재론적 의미란 평화가 실질적으로 존재하기 위해 지속 가능한 조건이나 상태가 충족된 것을 의미한다. 평화는 존재론적으로 생태평화, 경제평화, 문화평화, 정군평화 등 네 가지의 조건으로 이루어졌다. DMZ는 한반도 평화를 여는 문이다. 이 문을 열기 위해서는 평화의 존재론적 의미에 따라 평화를 회복, 유지, 구축해 나가야 할 것이다. 특히 한반도 평화가 중간에 파기되지 않고 지속되기 위해서는 평화의 존재론적 조건인 생태평화, 경제평화, 문화평화, 정군평화 등 영역별로 구분하여 평화복합체적으로 추진해 나가는 것이 바람직하다. 남한은 그동안 한반도 DMZ 평화를 위해서 북한에 다양한 평화구상을 제안해 왔다. 그러나 북한은 이를 거부해 왔다. 남북한 간에는 현재 개성공단 사업만 명맥이 유지될 뿐 다른 사업은 전면 중단됐다. 최근의 남북한 관계로 보아 조만간에 관계가 개선, 회복될 것으로는 보이지 않는다. 이러한 가운데 박근혜정부가 한반도 평화를 위해서 DMZ 세계평화공원 조성을 제안하고, 이를 추진하고 있다. 그러나 성공 여부는 미지수다. ‘평화를 원하거든 평화를 준비하라’ 박근혜 정부가 DMZ 세계평화공원을 성공적으로 조성하기 위해서는 평화의 존재론적 의미에 따라 평화복합체적으로 추진해 나가는 전략이 필요하다. 즉 평화협력이 가장 용이하고 남북한이 절실히 필요한 생태평화에서부터 시작해서 경제평화, 문화평화, 정군평화를 단계적, 선순환적으로 구축해 나가야 할 것이다. How should we sustain peace, and prevent it from being destroyed on the midway. To this end, it is necessary to approach on peace in the way of ``the ontological meaning of peace.`` The ontological meaning of peace is sustainable conditions or states of peace, satisfied to guarantee the practical existence of peace. Ontologically, peace consists of four conditions: ecological peace, economic peace, cultural peace, and political-military peace. DMZ could be a gate opening the peace in the Korean peninsula. To open this gate, it is needed to recover, maintain, and establish the peace in accordance with the ontological meaning of peace. In particular, to make the peace in the Korean peninsula sustainable and to prevent it being destroyed on the midway, it is desirable to pursue ``the peace complexes`` consisting of four categories of the ontological conditions of peace: ecological peace, economic peace, cultural peace, and political-military peace. To this day, South Korea has proposed diverse peace initiatives to North Korea in order for DMZ peace in the Korean peninsula. However, the North has resisted them. Meanwhile, between the two Koreas only Gaesong Industrial Complex project is barely surviving, but other projects were all shut down. Given the recent relationship between the two Koreas, it is hard to expect that the relationship would be improved and recovered in the near future. In this circumstance, Park Geun-Hye government has made a proposal of creating DMZ World Peace Park for the peace in the Korean peninsula, and tried to make it realized. However, the realization of this project is yet to be known. ``If you want peace, prepare for peace.`` To realize the success of DMZ World Peace Park, Park Geun-Hye government is required to come up with a strategy of ``peace complexes`` from the perspective of the ontological meaning of peace. In other words, it is necessary to start with ecological peace, which is the most urgent and easiest way for peace cooperation between the two Koreas, and then build economic peace, cultural peace, and political-military peace in a stepwise way and a virtuous circle.

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