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산화물유리에서의 $Na^+$이온과 $Ag^+$이온 교환에 따른 전기전도도 변화
한준수,강원호,이효경 한국전기전자재료학회 1996 電氣電子材料學會誌 Vol.9 No.3
The electrical properties of bulk galsses in the system Na$_{2}$O-CaO-Al$_{2}$O$_{3}$-B$_{2}$O$_{3}$-SiO$_{2}$ containing 20 to 30mol% sodium which have been subjected to a sodium .tautm. silver ion exchange reaction for 24, 36 and 48 hrs. were analysed by impedance spectroscopy method. Ion exchanged glasses exhibit activation energy values lower than those of the untreated ones. The electrical conductivity increase with sodium content and ion exchanging time. In this experiment the electrical conductivity exhibits a manximum value of 1.78*10$^{-4}$ S/cm at 200.deg. C which contains 30mol% sodium and subjects ion exchange reaction for 48hrs.
무수 에타놀의 색전 효과의 초기 작용기전에 대한 실험적 연구
한준구 대한영상의학회 1988 대한영상의학회지 Vol.24 No.6
Abdominal aortography and histopathologic examination after absolute ethanol infusion ar fast (0.4cc/sec) and slow speed(0.04cc/sec) were performed on 16 rats(2 controls. 7 fast infusion group. 7 slow infusion group) Angiographic and histopathologic findings were correlated and the findings of slow and fast infusion groups were studied. the results are as follows; 1. Histopathologic findings of the fast infusion group revealed wide area of glomerular and tubular collapes obliteration of the free space between the Bowmann's capsule and glomerulus sloughing and loss of the endothelium fresh thrombi attached to the wall and cleavage of the muscle layer of the arteries. 2. Angiographic findings of the fast infusion group revealed luminal irregularity early obstruction of the aorta and the renal arteries and delayed circulation time. 3. Histopathologic findings of the slow infusion group revealed degenerated coalesced red blood cell packed in the glomeruli focal areas of severe glomerular and tubular damage on relatively normal background en-dothelial and muscular damage of the arteries. 4. Angiographic findings of the slow infusion group revealed focal perfusion defect of the kidney delayed cir-culation time and mild luminal irregularity but there was no obstruction of the major arteries. 5. In conclusion author believes that endothelial damage and thrombus formation from the damaged vessel wall as well as direct cytotoxicity and in situ emboli formation play a significant role in the embolic effect of absolute ethanol.
민주화 이후의 이주노동정치사: 초기(1987~1993)
한준성 ( Jun Sung Han ) 서울대학교 한국정치연구소 2014 韓國 政治 硏究 Vol.23 No.2
‘이주노동정치’는 이주노동의 유입, 존재양태, 기존 사회와 맺는 관계, 관련 제도의 도입과 변천 등을 둘러싸고 관련된 주요 영역들 내지는 세력들 간에 벌어지는 힘과 가치정향의 충돌과 타협, 작용과 반작용 등의 복합적 상호작용들로 구성되는 정치적 현상이다. 그러한 점에서 1980년대 후반부터 이주노동의 국내 유입이 본격화되면서 시작된 ‘이주노동정치사’는 민주화 이후 민주주의의 성격을 판별하는 하나의 시험대이다. 본고의 목적은 이러한 점을 염두에 두고 1987년부터 산업연수생제도의 전면화가 결정된 1993년 말까지의 이주노동정치사를 검토하는 것이다. 이를 위하여 본고는 정책사나 운동사의 관점들을 포괄하면서도, 보다 중요하게는 정치사의 시각에서 행정, 경제, 노동, 시민사회 간 관계들의 복합적 전개과정에 주목한다. The aim of this research is to examine the early stage (1987~1993) of the history of migrant labor politics in South Korea. The underlying assumption of this study is that migrant labor issues represent a comprehensive political phenomenon, in which conflicts and compromises amongst key actors and spheres involved incessantly take place regarding a variety of issues, including the influx of migrant workers, their incorporation into the receiving society, and migrant labor policies. Employing the new concept of “migrant labor politics”, this research, therefore, also takes up the perspective of political history in order to sharpen our knowledge and evaluation of the complex formation of the migrant labor politics of South Korea. In light of this, the main focus is on the ongoing political relations among the four main spheres in particular ― the administration, the economy, the labor unions, and civil society. It is hoped that this research will help to sharpen the assessment of the state of democracy in South Korea, a migrant labor-receiving country in the international labor market.