http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
불화탄소 전극의 열분해 연료유 기반 탄소 코팅이 리튬일차전지의 고율속 성능에 미치는 영향
이상엽 ( Sangyeop Lee ),하나은 ( Naeun Ha ),명성재 ( Seongjae Myeong ),임채훈 ( Chaehun Lim ),이세현 ( Sei-hyun Lee ),이영석 ( Young-seak Lee ) 한국공업화학회 2024 공업화학 Vol.35 No.4
불화탄소 기반 리튬일차전지(Li/CFX)의 활물질로 이용되는 불화탄소는 낮은 전도성에 기인한 열악한 율속 특성으로 방전 성능이 제한적이다. 따라서, 본 연구에서는 이를 극복하기 위하여 불화탄소에 열분해 연료유를 이용하여 탄소코팅을 진행하였고, 전기화학적 성능을 고찰하였다. 탄소 코팅에 의하여 불화탄소 표면에 무정형 탄소층이 형성되었으며, 열처리 온도에 따른 불화탄소의 표면 물리화학적 특성을 면밀히 고찰하였다. 상용 불화탄소를 450 ℃에서 열처리한 ARC@C450 샘플은 sp2 탄소 결합의 함량이 62%로 가장 크게 증가하였으며, 반이온성 C-F 결합이 가장 많이 형성되었다. 또한, ARC@C450 샘플을 환원극 활물질로 이용한 일차전지는 가장 높은 5 C 율속(392 mAh/g)에서 안정적인 방전 특성을 보였으며, Rct 값은 미처리 시료에 비하여 53% 감소하였다. 따라서, 본 연구에서는 불화탄소의 낮은 전도성을 극복하기 위한 방법으로 열분해 연료유 기반 탄소 코팅을 제안하며, 탄소 코팅된 불화탄소는 우수한 율속성능을 나타냄으로 고출력 일차전지로의 응용 가능성을 제시한다. The performance of carbon fluoride-based lithium primary batteries (Li/CFX) is limited due to poor rate capability resulting from the low conductivity of carbon fluoride, which is used as the active material. Therefore, in this study, we applied a carbon coating using pyrolysis fuel oil on carbon fluoride to overcome this limitation and considered its electrochemical performance. An amorphous carbon layer was formed on the surface of the carbon fluoride through carbon coating, and the surface physicochemical properties of the carbon fluoride were meticulously considered based on the heat treatment temperature. The advanced research chemical 1000 heat treated at 450 ℃ (ARC@C450) sample, which was commercial carbon fluoride heat-treated at 450 ℃, showed the largest increase in the concentration of sp2 carbon bonds (62%) and the highest formation of semi-ionic C-F bonds. Also, the primary battery using the ARC@C450 sample as a cathode active material exhibited stable discharge capability at the highest rate of 5 C (392 mAh/g), and the Rct value was reduced by 53% compared to the untreated sample. Therefore, we proposed pyrolysis fuel oil-based carbon coating as a method to overcome the low conductivity of carbon fluoride, and the carbon-coated carbon fluoride showed excellent rate performance, suggesting its potential application in high-power primary batteries.
이상엽(Sangyeop Lee) 한국셰익스피어학회 2008 셰익스피어 비평 Vol.44 No.3
This thesis aims to show that both Shakespeare and Donne would reject Petrarchan conventions which came from courtly love in the Middle Age, and which represented a lover who suffered agonies and sickness of body and spirit at the caprices of a woman who had power over him and was very cruel to him. This rejection or defiance led Shakespeare to invent Dark Lady who was regarded as an ugly and detestable woman internally or morally as well as externally or physically. Unlike "old age"(127:1), "now"(127:3) the standard sonnet process of the idealization of the woman was impossible, and the sonnets took the demonization of the woman. The new period was differentiated as one in which merely simple reflection of the ideal woman disappeared. Therefore, the dark lady could be accepted as an icon of this new age. Shakespeare, though he sometimes employed the Petrarchan conceit himself, parodied some standard comparisons by Petrarchan sonneteers. As we know in Sonnet 130, we find that unlike a star like Stella in Sidney' work, Dark Lady was a common and black woman. In Petrarchan sonnets, the lady was ideally beautiful and virtuous. In contrast to this the Dark lady had no beauty or virtue. Donne was also inclined to parody and satirize the 'Platonic' poets who were to admire the external beauty of their mistresses as the manifestation of an internal beauty. We can find interrelations between love and politics in John Donne's The Songs and Sonnets. Donne was discomforted with serving a woman as in courtly love. He offered a different kind of service, which was clearly sexual. This kind of service rather restored male dignity; for it meant not servitude but mastery. In this respect he tried to abhor and debase a queen vertically in terms of politics and a woman horizontally in terms of private love. In The Songs and Sonnets, especially negative love poems, he had a mind to subvert a woman's rule and disrupt both court society and English church which had a belief in hierarchical order within a strict framework of social uniformity, which was basically the result of the concept of honor. The lovers in Donne's poetry attempted to be free from the mastery of a queen/a woman and reassert masculine sovereignty. To achieve this goal he, by acting on anti-Petrarchanism, disdained and abhorred the woman who was apt to be inconstant as well as untrue.
17세기 영국 형이상학파 시와 조지프 브로드스키: 20세기 현대 영미시에 끼친 존 던의 영향을 중심으로
이상엽(Lee, Sangyeop) 신영어영문학회 2021 신영어영문학 Vol.80 No.-
This study aims at examining how John Donne (1572∼1631), one of the 17th century British metaphysical poets, influenced the development of modern English and American poetry in the 20th century. This study is also intended for investigating how he influenced the poems of Joseph Brodsky (1940∼1996), the Jewish American exile poet from USSR. It is a well-known fact that Donne has a great influence on English and American poetry in the 20th century. On the basis of T. S. Eliot’s criticism and opinion, this study will look at how Donne influenced the 20th century modern English and American poets and then compare the poetry of Donne with that of Brodsky. By looking at the similarities between the two poets, this study will create a space where we can see how Donne influenced Brodsky’s poems. Although there is an interval of about 360 years in time, it is very meaningful to examine the extent of Donne’s influence on Brodsky.
세계문학의 관점에서 루미와 던의 유사점 연구: 사랑 모티브에 구현된 일원론
이상엽(Lee, Sangyeop) 신영어영문학회 2020 신영어영문학 Vol.77 No.-
This study aims to compare and analyze the similarities between Jaluddin Muhammad Rumi, a medieval Persian poet, and John Donne, an English leading metaphysical poet in the 17th century, from the perspective of Goethe’s world literature theory. Beyond simple comparisons, this paper is to find similarities between the two authors in terms of the literature and culture of the East and the West to meet and communicate with each other. Although times, religions, and languages are different, both authors are trying to break away from the dichotomous thinking as their literary orientation, and this paper tries to reveal how it as a non-duality is embodied in the motif of love in their works. In this process, a theory of Buddhism, namely, Advita (non-duality) is referred to. Many Islamic scholars claim that Sufism, a branch of Islamic mysticism, is directly or indirectly influenced by Hinduism and Buddhism in the process of forming the mystical ideas and performing techniques of Sufism. In this respect, it is advisable that Sufism can be seen as a hybrid spirituality.
체질량지수로 평가한 비만 및 허리둘레로 평가한 복부비만과 과민대장증후군의 연관성
이동영(Dong Young Lee),이정규(Jeong Gyu Lee),김영주(Young Joo Kim),이상엽(Sangyeop Lee),김윤진(Yun jin Kim) 대한임상노인의학회 2009 대한임상노인의학회지 Vol.10 No.2
Background: Irritable bowel syndrome is a functional bowel disease including chronic abdominal discomfort and abdominal pain which is relevant to changing of defecation feature. Irritable bowel syndrome's pathway is yet to be solved perfectly. Generally speaking, obesity affects gastrointestinal symptoms such as abdominal pain, nausea, vomiting, diarrhea and constipation. Therefore, there could be a relationship between obesity and irritable bowel syndrome. This research would like to figure out the corelation of obesity and irritable bowel syndrome and corelation of waist circumference which never been studied. Methods: The study group was from 90 colonoscopic exam patients of Health Promotion Center of Pusan national university. Among 90 of them, 19 were excluded because they had organic factor. Totally 71 patients' waist circumference were measured and researched on the corelation of Irritable bowel syndrome by using Rome II standard. Results: In women, the incident rate of obesity group (BMI≥25) and normal weight group (18.5≤BMI<25) were 60% and 9.5%, so that, the obesity group's incident rate was significantly increased in statistics. Relative risk of normal weight group without central obesity (M<90 cm, F<85 cm and 18.5≤BMI<25) compare with normal weight group with central obesity (M≥90 cm, F≥85 cm and 18.5≤BMI<25) was 4.23. Relative risk of obesity group with central obesity (M≥90 cm, F≥85 cm and BMI≥25) was 4.14. Conclusion: This research presented the corelation of irritable bowel syndrome and BMI in women and incident rate of patient with central obesity was significantly increased compare to normal weight group without central obesity. 연구배경: 과민대장증후군은 기질적 원인 없이 만성 복부 불쾌감이나 복통이 있으며 증상이 배변 양상의 변화와 관련되는 기능적 위장관 질환이다. 아직까지 과민대장증후군의 기전은 정확히 밝혀져 있지 않다. 비만은 복통, 구역, 구토, 설사, 변비 등 위장관 증상에 영향을 미친다. 본 연구는 비만 및 복부비만과 과민대장증후군의 연관성에 대해 알아보았다. 방법: 부산 소재의 3차 의료기관 외래와 건강증진센터를 방문하여 결장내시경 검사를 시행한 90명을 대상으로 하였다. 90명 중 기질적 원인을 가진 19명을 배제한 71명을 대상으로 체질량지수(body mass index, BMI)와 허리둘레(abdominal circumference, AC)를 측정하였고 로마 II 기준 사용하여 과민대장증후군과의 연관성을 조사하였다. 결과: 여성에서 비만(BMI≥25)군과 정상(18.5≤BMI<25)군을 비교시에 과민대장증후군의 유병률은 각각 60%, 9.5%로 유의하게 비만군에서 높게 나타났다. 정상(허리둘레; 남<90, 여<85 cm and 18.5≤BMI<25)군에 비해 복부비만(허리둘레; 남≥90, 여≥85 cm and 18.5≤BMI<25)군에서 오즈비(odds ratio)가 4.23이었으며, 복부비만 및 비만을 동시에 가진(허리둘레; 남≥90, 여≥85 cm and BMI≥25)군에서는 4.14로 나타났다. 결론: 본 연구결과 여성에서 과민대장증후군과 체질량지수와의 연관성이 있었고, 복부비만이 있을 경우 복부 비만이 없으며 체질량 지수가 정상인 경우보다 과민대장증후군의 위험도가 크게 나타났다.