친환경 수성 그라비어잉크의 개발과 상용화

이병찬,Lee, Byeong-Chan (사)한국포장협회 2022 包裝界 Vol.351 No.-

슈퍼 2상 스테인리스강의 공식에 미치는 R상의 영향

이병찬,오은지,강창룡,Lee, Byung-Chan,Oh, Eun-Ji,Kang, Chang-Yong 한국재료학회 2014 한국재료학회지 Vol.24 No.11

In this study, we investigated the precipitation behavior of the R-phase precipitated at the initial stage of aging and its effect on the pitting corrosion of 25%Cr-7%Ni-4%Mo super duplex stainless steel. The R-phase in super duplex stainless steel was mainly precipitated at the interface of ferrite/austenite phases and inside of the ferrite phase during the initial stage of aging, and it was transformed into the ${\sigma}$-phase with an increase in aging time. The ferrite phase was decomposed into a new austenite phase and ${\sigma}$-phase. The R phase was an intermetallic compound, which represented a lower Ni and higher Mo than the matrix, and also had a higher Mo and Cr concentration than the ${\sigma}$ phase. With an increasing aging time, the pitting potential $E_p$ was increased slowly by the precipitation of the R-phase, and it was then steeply decreased by the precipitation of the ${\sigma}$-phase. The R-phase was decreased the pitting potential, but its effect was smaller than effect of ${\sigma}$-phase.

25Cr-7Ni-2Mo-4W 슈퍼 2상 스테인리스강의 기계적 성질에 미치는 R상의 영향

이병찬,강창룡,Lee, Byung-Chan,Kang, Chang-Yong 한국재료학회 2014 한국재료학회지 Vol.24 No.8

In this study, we investigated the precipitation behavior of the R-phase precipitated at the initial stage of aging and its effects on the mechanical properties of 25%Cr-7%Ni-2%Mo-4%W super duplex stainless steel. The R-phase was mainly precipitated at the interface of ferrite/austenite phases and inside of the ferrite phase during the initial stage of aging. It was transformed into the ${\sigma}$-phase with an increase of the aging time. The ferrite phase was decomposed into a new austenite(${\gamma}_2$)phase and the ${\sigma}$-phase by an aging treatment. The R phase was an intermetallic compound showing higher molybdenum and tungsten concentrations than the matrix and also showed higher molybdenum and tungsten concentrations than the ${\sigma}$ phase. In the initial stage of aging, precipitation of the R-phase did not change the hardness, the strength and the elongation. The hardness and the strength increased upon a longer aging time, but the elongation rapidly decreased. These results show that the R-phase did not significantly affect the hardness and the strength, though it did influence the elongation.

기획특집 3 - 녹색건축의 기술과 활성화 방안

이병찬,Lee, Byeong-Chan 환경보전협회 2009 환경정보 Vol.31 No.384

漢詩 聲律論과 『詩經』 樂譜의 相關性 硏究

이병찬(Byeong-chan, Lee) 어문연구학회 2009 어문연구 Vol.62 No.-

The Book of Songs in China was the lyrics of music. At the first time, there was no way to write music. Therefore, only The Book of Songs(詩經) has remained until now and there is no music book. According to Annals of Zuo in ‘the Spring and Autumn Period', it says that a person who named KyeCheol(季札) saw the music in JU nation. The music of JU nation is The book of Songs(詩經). The person who has arranged the music of The Book of Songs(詩經) was Confucius(孔子) in the first place. But no one knows how he arranged The book of Songs. The music in The Book of Songs seems to be disappeared before JIN nation. Primarily, the music in The Book of Songs was used at Royal Court. Thus, kings of many generations tried to restore it. The first date of using The Book of Songs was surmised in the Tang Dynasty(唐代) after its restoration. The music on Fengya Shiershi Pu(風雅十二時普) was written by Zhao Yan Su(趙彥肅) in Song Dynasty. JuJa(朱子) wrote down this music in Rites The Classic General solution(儀禮經典通解). In Korea, this music is published in Shiyuehuesheng(詩樂和聲) and Shiyuemiaoxie(詩樂妙契) which were written by Seo, MyongEung(徐命膺). He explained in detail about the mutual relation between The Book of Songs and music in these books. Also, Yun, ChunNyeon(尹春年) and Lee, HyeongSang(李衡祥) were interested in Rites The Classic General solution(儀禮經典通解), and they concerned the mutual relation between poet and music. Yun, ChunNyeon(尹春年) explained the way of connection between poet and music. And Lee, HyeongSang(李衡祥) clarified the mutual relation between a music of The Book of Songs and a tone of the interface(界面調) in Korea. The records of Seo, MyongEung(徐命膺), Yun, ChunNyeon(尹春年), and Lee, HyeongSang(李衡祥) are very important materials to understand the relation between The Book of Songs and music. This research has classified the mutual relation between The Book of Songs and music with these materials.

GPS용 RF Front-End 수신단을 위한 L 대역 저잡음 증폭기 개발

이병찬(Byeong-Chan Lee),손정택(Jeong-Taek Son),임정택(Jeong-Taek Lim),이재은(Jae-Eun Lee),송재혁(Jae-Hyeok Song),김준형(Joon-Hyung Kim),백민석(Min-Seok Baek),박종성(Jong-Seong Park),이은규(Eun-Gyu Lee),김철영(Choul-Young Kim) 한국전자파학회 2024 한국전자파학회논문지 Vol.35 No.2

GPS의 프론트-엔드 수신단에서는 잡음 지수가 매우 중요하며 잡음 지수가 낮고 크기가 작은 저잡음 증폭기를 요구한다. 본 논문에서는 0.18 μm CMOS 공정을 이용한 L 대역 저잡음 증폭기의 설계에 관한 내용이다. 저잡음 특성을 위해 입력단 직렬 인덕터를 제거하고 트랜지스터의 유효폭(effective width)을 늘려 임피던스 정합을 이루어 냈으며 작은 칩 크기를 위해 높은 인덕턴스를 요구하는 인덕터들을 적층 구조로 제작하였다. 제작된 저잡음 증폭기는 1.4 GHz부터 2.1 GHz에 이르는 대역에서 2.5 dB 이하의 잡음 지수, 10.57 dB 이상의 반사손실, 17.3 dB의 최고 이득, 1.05 mm×0.78 mm의 크기를 달성하였다. In the front-end receiver of a GPS, the noise figure is extremely important and requires a low-noise amplifier with a low noise figure and small size. This study aims to investigate the design of an L-band low-noise amplifier using the 0.18-μm CMOS process. For low-noise characteristics, the input series inductor was removed, the effective width of the transistor was increased to achieve impedance matching, and the inductors requiring high inductance had laminated structures with small chip sizes. The low-noise amplifier achieved a noise figure of less than 2.5 dB, a return loss of more than 10.57 dB, a peak gain of 17.3 dB, and a size of 1.05 mm×0.78 mm in frequency from 1.4∼2.1 GHz.

대마도일기 수창시 연구 - 최익현ㆍ임병찬ㆍ홍주의사 구인의 수창시를 중심으로 -

이병찬(Lee Byung-chan),박우훈(Park Woo-hoon) 어문연구학회 2004 어문연구 Vol.44 No.-

Myeon Am, Choi, Ik-hyun(1831~1906), a leader of righteous movement, fought against continuous invasion of Japan, but failed to save the country and was arrested by Japanese soldiers due to participation in the resistance in Tain. Im, Byong-chan(1851~1916) was also arrested and sent to prison in Daemado with him. Choi, Ik-hyun met with 9 men, who were in custody there because of the resistance in many different regions, Lee, Shick(1873~1936) from Cheongyang, Nam, Gyu-jin(1863~?) from Yesan, Ahn, Hang-shick(1860~1922), Shin, Bo-gyoon(1865~1912), Shin, Hyun-doo (1886~?) from Hongsung, Lee, San-doo(1859~1926) from Booyeo, Yoo, Joon-geun(1860~1920) from Boryeong, Choi, Sang-jip(1846~?) from Boryeon, Nampo and Moon, Suk-hwan(1869~1925) from Boryeong, Biihn. He died there with those 9 men. This paper deals with Soochangshi(poem) exchanged between Im, Byong-chan and 9 righteous men of Hongjoo. Those poems are very valuable pieces of work that show the trace of honest life of people who were willing to lose their life to save the country in crisis. The study in the paper will bring light on the process that the righteous men went through to create Soochangshi and the significant value and meaning that those poems have.

대뇌신경세포의 산화적 손상에 대한 조구등의 영향

이병찬 ( Lee Byeong Chan ),이재규 ( Lee Jae Gyu ),이강창 ( Lee Gang Chang ),정종길 ( Jeong Jong Gil ),이건목 ( Lee Geon Mog ),신민교 ( Sin Min Gyo ),송호준 ( Song Ho Jun ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.3

N/A Objectives : It is well known that oxidative stress of reactive oxygen species is involved in neuronal disease. The purpose of this study was to examine the cytotoxicity of glucose oxidase(GO) and protective effect of Ramulus et Uncus Uncariae(REUU) on GO- induced cytotoxicity in the cultured cerebral neurons of mouse. Methods : Neurototoxicity of GO and protective effect of REUU were done by MTT assay, after cerebral neurons were cultured in the media containing 1-40 mU/ml CO for 4 hours. Results : GO decreased cell viability in dose-and time-dependent mannner, and REUU increased cell viability decreased by C d induced cytotoxicity in these cultures. Conclusion : From these results. Go showed neurotoxicity, and REUU is very effective in preventing GO-mediated cytotoxicity in cultured mouse cerebral neurons.

연재 송병선의 유기문학 연구

이병찬(Byeon-chan, Lee) 어문연구학회 2011 어문연구 Vol.68 No.-

In Chinese literature, travel literature is so attractive. It is widely used in verse and prose. Thus, it is useful to establish the harmonious relationship between art and morality other than a certain genre. Otherwise, it became a point of contact of a filed of art. Also, it was naturally accomplished about contents of architecture, painting, a tombstone and stone carving. Travel literature of Yeonjae was showed well about this. 19C which was Yeonjae lived, is the time that a lot of travel literature has been written already. The value of travel literature is showed when travel literatures in same region get over the repetition. Thus, Yeonjae’s travel literature has been tried to write different view comparing with the previous generation. He wrote his feeling about their experiences and feelings. And it is focussed the part of less interests by them or ecological adaptation.dndn Yeonjae’s travel literature which is called ‘great Confucianism’ in late of 19C has various views in contents. He was an obvious person about an attitude of Neo-Confucianism and he found a school of Yeonjae. But he did not show his special rejection to many vestiges of Buddha which are bordered natural travels. Also, he accepted them as a part of nature. He visited not only natural places but also several lecture halls and the ruins of ancestors for being avoid to pursue pleasures. He established the harmonies relationship between art and morality. And then he tried to realize a pertinent harmony in travel literature without in being highlighted to one side. Of course, it is highlighted to one side partially. For instance, [From Seonggeosan to Gyoha] in 〈Journey To The West〉 is an academic discussion with Gimbakyun entirely. But it is practiced the virtue of moderation which is showed various views according to the situation without any purpose generally. Also, its characteristic which is the meeting between nature and literature preserved just as it was. He maximized the effect of literary figuration and the value by using appropriate verse written by former poets. Yeonjae made fully accomplishment of former travel literatures written by Kim, Chang-Yeop or Lee, Eu-Hyeon and brought his interests as of calligraphy into relief. In technical way of composition, his way was too far a way from the trend which pursued elegant, lyric and individual style in 18C. And he is a faithful heir. Entire situation of travel literature in late Joseon is not grasped yet. Therefore, appreciation of literary value in Yeonjae’s travel literature is difficult. But it is clear that is has an important position with his literary value, interests of travel literature and level of works.

단삼이 활성산소로 손상된 배양 심근세포에 미치는 영향

이종화 ( Lee Jong Hwa ),이병찬 ( Lee Byeong Chan ),박승택 ( Park Seung Taeg ),이정헌 ( Lee Jeong Heon ),이강창 ( Lee Gang Chang ),서부일 ( Seo Bu Il ),송호준 ( Song Ho Jun ) 대한본초학회 2003 大韓本草學會誌 Vol.18 No.3

N/A Objectives : To clarify the cardotoxicity and the protective effect of Salviae Multiorrhizaei Radix(SMR) on oxygen free radicals in cultured myocardial cells of neonatal mouse. Methods : Cardiotoxicity was measured by MTT assay after myocardial cells were grown for 5 hours in the media containing 1-30 μM concentrations of H₂O₂. In addition. the protective effect of Salviae Multiorrhizaei Radix(SMR) was determined in these cultures. Results : Cell viability was significantly decreased in dose- and time-dependent manners after hours. In the protective effect, SMR exposure of 15 pM H.02 to cultured rat myocardial cells for 5 prevented the HLOz-induced cytotoxicity in these cultures. Conclusion : From the above results, it suggests that HDr has toxic effect on cultured mouse myocardial cells and SMR blocked the cardiotoxicity induced by H.02.