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오일스네어에 대한 오일 흡착기준 정립 및 고시방향 연구
진영민,유주영,최상선,주아람,이준혁,이순홍 한국안전학회 2019 한국안전학회지 Vol.34 No.6
In South Korea, the enact of Korean Coast Guard Act-1 manages physical and chemical oil-dispersants. Oil snare, which is made of polypropylene, is newly added to the aforementioned act, and it has advantage on the ease of recovery compare to other adsorbents. This study synthesized bunker B-oil with diesel-oil and bunker C-oil to perform an adsorption test based on three samples which were manufactured in South Korea. As a result, adsorption test revealed 5.2 g/g more adsorption than the previous results from the act. Additional toluene test revealed that all the samples satisfied 90.0%, however coloured samples could release its pigment on the marine environment. Thus, colorless samples are recommended on the risk management of marine accidents. The study on the basic direction of the calculation of the test items and the standard value for the quality control of the oil snare was also carried out.
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Correlations Between Alkali and Crystallinity in lyocell-Based ACF Probed with X-Ray Diffraction
진영민,이준혁,최상선 대한금속·재료학회 2020 대한금속·재료학회지 Vol.58 No.7
This study examined the effect of alkalis on lyocell-based activated carbon fibres (ACFs) with high Brunauer-Emmett-Teller (BET) surface areas, using X-ray diffraction (XRD). Here, alkali treatments were conducted using 10 ~ 25 % NaOH and KOH on lyocell samples for 3 h at ambient room temperature. A secondary treatment with 4 % each of KOH and H3PO4 for an additional 3 h followed. An activated form of the samples was prepared by oxidation (stabilisation), carbonisation, and activation. The final ACF form of the samples showed a porous structure with high BET surface areas (> 1,000 m2 g-1). A 25 % dosage of NaOH produced the highest BET surface area compared to other samples. In terms of crystallinity, a 15 % dosage of KOH was found to be the optimum dosage to secure the highest degree of crystallinity among all samples. Meanwhile, the NaOH was successfully shifted the samples into the most distinct form of cellulose II. 15 % NaOH was found to secure the most stable thermal characteristics, as determined via thermo-gravimetric analysis. The present work demonstrates the various physio-chemistries of ACFs prepared with different proportions and types of alkalis, leading to intriguing potential applications.
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진영민 한국청동기학회 2016 한국청동기학보 Vol.18 No.-
한반도의 점토대토기문화가 遼寧地域의 주민 이주로 형성된 문화라는 점에 대해서는 대부분의 연구자 들이 동의하고 있다. 그러나 이 문화 형성기의 개시연대에 대한 연구자들의 견해는 일치되지 않고 있 다. 본고에서는 이러한 문제가 현재의 편년안에서 기인한다고 보고 편년과 개시연대에 대한 전반적인 검토를 시도하였는데, 그 결과 학계에서 주류라고 판단되는 점토대토기문화 개시연대인 기원전 6세기 ~ 5세기설에는 여러모로 재고의 여지가 있다고 판단하였다. 이 시기 遼東地域에서는 雙耳 점토대토기 형식이 유행하였으며, 이 점토대토기는 한반도에서는 출토되지 않는다는 점을 주목하였다. 반면에 한 반도에서는 성립기부터 鈕耳 점토대토기가 출토되고 있으며, 이 형식의 토기는 요동지역에서 기원전 4세기 이후에 등장하는 것으로 확인된다. 따라서 주민 이주를 전제로 하는 입장이라면 개시연대가 기 원전 4세기 이전으로 상향될 가능성이 희박하다고 보았다. 그리고 요동지역에서는 지역 구분에 따라 시간성과 관계없이 점토대토기의 형식과 공반 유물에서 차이가 관찰된다. 반면 한반도 남한지역 성립 기의 유물 조합상은 전 지역에서 거의 동일하게 출토되고 있음을 알 수 있었다. 이러한 분포는 이주 집단의 원거주지가 요동지역에서도 한정된 지역이었음을 시사하는 근거라고 판단하고, 太子河 유역의 本溪縣 일대가 이주민 집단의 기원지였을 것으로 추정하였다. It is generally recognized that the pottery with clay stripes culture in the Korean peninsula is derived from inhabitants migration from Liaoning province, in China but it is not coincided about the beginning of this cultural formation period. This study examined generally on chronology and commencement, considering the present chronology causing confusion and in result, needs to be reconsidered that the commencement of the pottery with clay stripes culture, considered as the mainstream in academic community, is around B.C. 6-5C. On that period, it is noticed that in Liaodong area, double mouth rim pottery was famous and this type of pottery is not found in Korean peninsula, whereas, in Korean peninsula, from established, rounded clay-stripe pottery is found and it is confirmed that this kind of pottery appeared after B.C. 4C in Liaodong area. Therefore, under the premise of migration, commencement will hardly be before B.C. 4C. And more, in Liaodong area, from district division, without relation to time factors, there exist differences from the form and the association relic of the pottery with clay stripes. whereas, during establishment of south area in Korean peninsula, relic artifact are found similarities around the whole area. and from this distribution factor, it is estimated that original habitation of migration means a limited area in Liaodong area and Benxi Manchu around Taizi area is presumed as the original habitation of migration.
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진영민 한국고고학회 2020 한국고고학보 Vol.0 No.116
The clay seal is a kind of sealing device that uses a seal and clay to seal important objects. The objects of the seal are documents, such as letters, official documents, and other unspecified objects of varying importance. Clay seals played an important role in the overall administrative system of national governance and were mainly used from the Warring States Period to the Wei and Jin Dynasties; they flourished during the Qin Dynasty, and became more developed and fully established during the Han Dynasty. Clay seals inevitably reflect the official emblems used at the time, so therefore have the advantage of being able to be compared directly with literary records. However, the existing clay seals include fake clay seals, which acts as a major obstacle for research. In particular, such fake clay seals are present amongst the ‘clay seals passed down through generations’ which were used in previous studies as a key data set. As a result, chronological studies on clay seals have been hampered with the fundamental problem of circular logic, and objective methods of distinguishing fake clay seals from genuine ones have yet to be established. In this paper, these problems inherent in previous studies were acknowledged and an alternative chronology of clay seals was presented in which ‘clay seals passed down through generations’ were exempt. This alternative chronology and the pre-existing chronology were then compared. The former was found to be consistent with the latter in terms of the overall changing trend but discrepancies between the two could also be observed. In particular, differences existed in the temporal starting point and duration of each seal type. It was proved, therefore, that it was impossible to establish a chronology of Han Dynasty clay seals based only on a selected number of clay seal types. The need for a more comprehensive approach in which both the font and form of clay seals are taken into account in future studies was argued, as was the need to secure and verify continuous new data, given that the chronology of clay seals remains at an unstable stage.
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