http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Valorization of Fly Ash as a Harmless Flame Retardant via Carbonation Treatment
Sang Eun Shim(심상은),김용하 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Owing to the environmental and economic problems arising from fly ash (FA), there have been various ongoing efforts over the past decades to find a use for it. Among the various applications of FA, its use as a filler in polymer composites has gained much attention. However, most studies have applied FA as a semi-reinforcing filler, which only marginally improves mechanical properties arising from the poor surface wettability of FA with polymer matrices. To solve this problem and to explore new applications, FA was carbonated by bubbling CO2 in water. The carbonated FA was adopted as a fire-proofing filler in silicone rubber and polypropylene. The surface properties and compositional changes of FA by carbonation were thoroughly examined. Mechanical and thermal properties of carbonated FA-filled polymer composites were evaluated and the interaction between the filler and matrix was calculated using DFT calculation.
게임 아이템 거래를 통한 자금세탁 기법 고찰 및 방지방법에 대한 연구
심상은(Sang-Eun Shim) 한국디지털포렌식학회 2015 디지털 포렌식 연구 Vol.9 No.2
온라인 게임 아이템과 관련한 다양한 유형의 사이버 범죄가 발생되고 있고, 범죄로 획득 한 게임 아이템은 현금 거래를 통해 돈세탁 되고 있다. 아이템 거래 과정에서 불법 자금이 세탁되는 요인을 파악하여 효과적으로 규제한다면 범죄자들이 불법 자금을 사용하는 것을 방지할 뿐 아니라 피해 금원을 환수하고, 게임 아이템 거래를 기반으로 하는 사이버 범죄 감소에도 도움을 줄 수 있다. 본 논문은 게임 아이템 거래를 이용한 자금 세탁 과정을 고찰하고, 이를 방지할 수 있는 방법을 논하고자 한다. Cyber crime of various forms has increased by the activation of the online game, Illegal funds which criminals won has been used in game item purchase, through the trading of several stages, and then money laundering. If we find what cause illegal funds can be money laundering in the processing of game item real trade and control it, and then it can prevent criminals from using illegal funds, and it can help to return the damage money, to decrease the cyber crime based transactions game item. Therefore, in this paper, study the process and prevention strategy of money laundering by game item real money trade.
Nanosecond Laser Flash Photolysis Study of 5-Styryl-1,3-dimethyluracil
심상철,신은주,채규호,Shim Sang Chul,Shin Eun Ju,Chae Kyu Ho Korean Chemical Society 1985 Bulletin of the Korean Chemical Society Vol.6 No.4
The photoisomerization of 5-styryl-1,3-dimethyluracil is studied with nanosecond laser flash photolysis technique at room temperature. The laser flash photolysis of E-isomer produces the transient absorption spectrum regarded as the triplet-triplet absorption, but the transient absorption of Z-isomer does not show the typical decay curve, probably due to the facile photocyclization reaction during the laser flash photolysis. Using the energy transfer method on nanosecond laser spectroscopy, the energy of the lowest triplet state for E isomer is estimated to lie between 41.8 and 47 kcal/mol. The triplet lifetime for E-isomer obtained from the decay curve of the transient absorption is ca. 93ns. The $S_1 → T_1$ intersystem crossing of E-isomer on direct excitation is relatively inefficient at room temperature supporting the singlet mechanism for direct photoisomerization.
기능성 소화불량증에서 13C - 요소호기검사의 DOB30 와 위근위부 운동기능과의 상관관계
심상군(Sang Goon Shim),이풍렬(Poong Lyul Rhee),현재근(Jae Gun Hyun),김지은(Jee Eun Kim),성인경(In Kyung Sung),장재권(Jae Kwon Jang),류광현(Kwang Hyun Ryu),김영호(Young Ho Kim),김재준(Jae J . Kim),고광철(Kwang Cheol Koh),백승운(Seung 대한소화기학회 2001 대한소화기학회지 Vol.38 No.6
Background/Aims: 13C-urea breath test (UBT) is accepted as an accurate test to detect Helicobacter pylori (H. pylori) infection. The results of UBT could be correlated with the extent of H. pylori colonization density or the severity of the gastric mucosal inflammation. We examined whether UBT values correlated with some parameters for proximal gastric motor functions in functional dyspepsia (FD). Methods: Twelve patients with FD and H. pylori infection confirmed by UBT were included. Breath samples were taken before and 30 min after 75 mg 13C-urea ingestion and analyzed by isotope mass spectrometry. The results of UBT were expressed as the difference between value at 30 min and value at baseline (DOB30). Gastric emptying scintigraphy and gastric barostat study were performed to measure the proximal gastric motor functions. Results: No significant correlation was found between DOB30 and proximal half-emptying time (r=-0.34, p=0.28), DOB30 and proximal gastric distribution of meal at 1 min images (r=0.03, p=0.93). According to the gastric barostat study, basal tone (r=0.53, p=0.07), compliance (r=-0.05, p=0.86), and gastric accommodation (r=-0.08, p=0.79) were not associated with DOB30. Conclusion: DOB30 does not correlate with proximal gastric motor parameters in patients with FD. (Korean J Gastroenterol 2001;38:405-410)
전이금속촉매-일산화탄소-물계에 의한 카르보닐화합물의 이중 히드로히드록시메틸화 반응
심상철,민경은,허근태,Sang Chul Shim,Kyung Eun Min,Keun Tae Huh 대한화학회 1986 대한화학회지 Vol.30 No.1
아디파알데히드, 구르타르알데히드 및 숙신알데히드와 같은 디알데히드는 물-에톡시에탄올 및 에탄올내에 촉매량의 육로듐 십육카르보닐 또는 오카르보닐철의 존재하, 70기압, 일산화탄소, 180$^{\circ}C$, 4시간동안 반응시켜 쉽게 환원되어 대응하는 1,6-헥산디올 및 1,5-펜탄디올 및 1,4-부탄디올이 좋은 수득율로 얻어졌다. 같은 조건하에서 2,5-헥산디온, 2,4-펜탄디온도 대응하는 디올이 보통 수득율로 얻어졌다. 디알데히드의 이중 히드로히드록시메틸화 반응에 대해서는 금속카르보닐 촉매가 다른 촉매보다 더욱 활성적이다. 특히 벤조퀴논은 정량적으로 히드로퀴논을 주었다. Dialdehydes such as adipaldehyde, glutaraldehyde, and succinaldehyde were readily reduced to give their corresponding 1,6-hexanediol, 1,5-pentanediol, and 1,4-butanediol in good yields in the presence of catalytic amount of hexarhodium hexadecacarbonyl or iron pentacarbonyl in water and methoxyethanol or ethanol at 180$^{\circ}C$ for 4 hr under carbon monoxide atmosphere. Under the same reaction conditions, diketones such as 2,5-hexanedione, 2,4-pentanedione, and 2,3-butanedione afforded their corresponding 2,5-hexanediol, 2,4-pentanediol and 2,3-butanediol in moderate yields. For double hydrohydroxymethylation of dialdehydes or diketones, rhodium or iron carbonyl complexes are more effective than others. Particularly, benzoquinone gave hydroquinone quantitatively.
생분해성 간섭나사를 이용한 전방 십자 인대 재건술 후 발생한 결절종 - 증례보고 -
송은규,심상돈,김명선,Song, Eun-Kyoo,Shim, Sang-Don,Kim, Myung-Sun 대한관절경학회 2002 대한관절경학회지 Vol.6 No.2
자가 슬괵건을 이용한 전방 십자인대의 재건술시 사용되는 Poly-L-Lactic-Acid 성분의 생분해성 간섭나사로 인한 합병증은 많지 않다. 저자들은 전방 십자 인대 재건술시 생분해성 간섭나사로 이식건을 고정 후 경골 터널 전방에 발생한 결절종에 대해 결절종 절제술과 동시에 간섭나사를 제거한1예에 대해 보고하는 바이다. The complication caused by a bioabsorbable interference screw composed of Poly-L-Lactic-Acid is rare after anterior cruciate ligament (ACL) reconstruction. We reported a case of a pretibial ganglion at the orifice of the tibial tunnel where the graft tendon had been fixed with a bioabsorbable interference screw $(Bioscrew^{\circledR})$ for ACL reconstruction using autogenous hamstring tendon. The patient was underwent ganglion excision and interference screw removal.
최은지(Eun Ji Choi),왕징(Jing Wang),윤지환(Ji Hwan Yoon),심상은(Sang Eun Shim),윤주호(Ju Ho Yun),김일(Il Kim) 한국청정기술학회 2011 청정기술 Vol.17 No.1
과학자와 공학자들은 끊임없이 금속, 합금, 고분자, 세라믹 등의 공학재료의 성질을 계속해서 변화하는 사회의 요구에 부응하는 방향으로 개선하여 왔다. 인조 공학재료는 일반적으로 기계적 성질이 우수하여, 자연 재료의 기계적 성질보다 우수한 경우가 많다. 그러나, 이와 같은 공학 재료는 자연계에서 흔히 볼 수 있는 자기치유능력, 즉 고의적인 인간의 접촉을 거치지 않고도 미세 균열을 제거하는 능력이 부족하다. 자연에서 관측할 수 있는 손상관리 패러다임은 여러 가지 종류의 공학재료의 고유 성질을 잘 고려하면 인조 공학재료에서도 성공적으로 재현할 수 있다. 특히 적절한 화학반응과 분자간력을 응용하면 고분자, 아이오노머, 복합체와 같은 유기재료에 적용할 수 있는 다양한 자기치유 방법을 개발할 수 있다. Scientists and engineers have altered the properties of materials such as metals, alloys, polymers, ceramics, and so on, to suit the ever changing needs of our society. Man-made engineering materials generally demonstrate excellent mechanical properties, which often far exceed those of natural materials. However, all such engineering materials lack the ability of selfhealing, i.e. the ability to remove or neutralize microcracks without intentional human interaction. The damage management paradigm observed in nature can be reproduced successfully in man-made engineering materials, provided the intrinsic character of the various types of engineering materials is taken into account. Various self-healing ptotocols that can be applied for the organic materials such as polymers, ionomers and composites can be developed by utilizing suitable chemical reactions and physical intermolecular interactions.