• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 춘계학술대회
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• pp.197-203
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• 2007

Teshima has been a quiet and beautiful island, but started to be imaged as an "island of wastes" because of the 600,000 tons of industrial wastes thrown there illegally. Now it symbolizes the problem of industrial wastes in Japan. Teshima development company, an industrial waste disposer, started to dispose industrial wastes illegally in the west side of the island, since the late 1970s. Hyogo Police Station exposed this illegal act, and arrested 6 persons of the company, including its president, in charge of having violated the Waste Disposal and Public Cleansing Law in 1991. This illegal disposition has continued for 13years until it was exposed by the police. Teshima case of industrial wastes are introduced in this paper.

• 자원리싸이클링
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• 제16권6호
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• pp.61-67
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• 2007

크고 작은 700개의 섬으로 이루어진 세토내해는 경치가 매우 아름다운 곳이다. 그러나 산업폐기물의 불법투기로 인해 이 세토내해의 조그마한 섬인 데시마(豊島)에서 비극적인 일이 발생하였다. 그것은 1978년으로부터 13년간에 걸쳐, 악질적인 사업자와 가가와현(香川縣)이 사업자를 옹호한 것에 의해 유해산업 폐기물이 불법 투기된 사건이다. 1990년 경찰의 적발에 의해 작업이 중지되었지만 60만톤을 초과하는 산업폐기물이 방치되어, 다이옥신을 포함하는 유해물질이 계속해서 데시마 해안에 흐르고 있다. 이 사건은 일본의 전형적인 경제우선을 상징한다. 데시마 도민 약 1400명은 25년 동안 반대운동을 한 결과 2000년 6월 6일 국가의 공해조정이 성립, 데시마의 재생을 위한 작업이 현재 진행되고 있다. 산업폐기물에서 발생된 유해물질이 해안으로 흐르는 것을 차단하고, 불법투기된 폐기물을 인근의 나오시마(直島)로 이송하여 재처리하는 것이 2004년부터 진행되고 있다. 소요비용은 초기에 약 5천억원으로 계획되었으나, 이보다 많은 비용이 소요될 것으로 예상된다. 여기 에서는 불법투기된 폐기물의 재처리에 대하여 상세하게 소개하고자 한다.

• 한국재료학회:학술대회논문집
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• 한국재료학회 2010년도 춘계학술발표대회
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• pp.5.1-5.1
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• 2010

One of the most important environmental problems is global warming. Global warming is caused by increase in the amounts of water vapor, methane, carbon dioxide and other gases being released into the atmosphere as a result of the burning of fossil fuels. It has thus become important to reduce fossil fuel use. Environmentally friendly preparation of functional materials has, therefore, attracted much interest for environmental problems. Furthermore, nature mimetic processes are recently been of great interest as environmentally friendly one. There have been many studies on fabrication of various functional nanocrystals. Among various nanocrystal fabrication techniques, flux growth is an environmentally friendly, very convenient process and can produce functional nanocrystals at temperatures below the melting points of the solutes. Furthermore, this technique is suitable for the synthesis of crystals having an enhedral habit. In flux growth, the constituents of the materials to be crystallized are dissolved in a suitable flux (solvent) and crystal growth occurs as the solution becomes critically supersaturated. The supersaturation is attained by cooling the solution, by evaporation of the solvent or by a transport process in which the solute is made to flow from a hotter to a cooler region. Many kinds of oxide nanocrystals have been grown in our laboratory. For example, zero- (e.g., particle), one- (e.g., whisker and tube) and two-dimensional (e.g., sheet) nanocrystals were successfully grown by flux method. Our flux-growth technique has some industrial and ecological merits because the nanocrystal fabrication temperatures are far below their melting points and because the used reagents are less harmless to human being and the environment.

• Journal of Gastric Cancer
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• 제23권4호
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• pp.512-522
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• 2023

Purpose: Dental floss clip (DFC) traction-assisted endoscopic submucosal dissection (ESD) is widely performed owing to its simplicity. This study aimed to clarify the appropriate indications for the DFC traction method in early gastric cancer when ESD is performed by less-experienced endoscopists. Methods and Methods: We retrospectively analyzed 1,014 consecutive patients who had undergone gastric ESD performed by less-experienced endoscopists between January 2015 and December 2020. Gastric ESD was performed without DFC in all cases before December 2017 [DFC (-) group, 376 cases], and ESD was performed with DFC in all cases after January 2018 [DFC (+) group, 436 cases]. The procedure time and rates of en bloc resection, complete resection, and adverse events of the groups were compared. Results: The procedure time did not differ significantly between the 2 groups. However, when comparing lesions >20 mm, the procedure time in the DFC (+) group was significantly shorter than that in the DFC (-) group (95±46 vs. 75±31, P<0.01). The procedure time for lesions located in the greater curvature of the upper or middle stomach and lesions >20 mm located in the lesser curvature side of the stomach in the DFC (+) group was significantly shorter than that in the DFC (-) group. Conclusions: The indications for DFC during gastric ESD by less-experienced endoscopists include lesions located in the greater curvature of the upper or middle stomach, and lesions >20 mm located in the lesser curvature of the stomach.