Fe-6 (Cu-Sn) 소결합금의 기계적 성질에 미치는 Sn 첨가량의 영향

박영도,김도연 대한금속재료학회(대한금속학회) 1983 대한금속·재료학회지 Vol.21 No.3

The effects oP Sn contents and sintering temperature on dimensional change, tensile strength and hardness of sintered Fe-6 (Cu-Sn) alloy were investigated. Due to liquid phase occuring during sintering, all the specimens showed dimensional expansion after sintering and the sintering temperature at which a relatively large expansion occured decreased with Sn content. Thus the addition of small amount of Sn in place of Cu aids the sintering operation because it lowers the liquid phase forming temperature. From mechanical property tests, it has been shown that the properties obtained from compacts of Fe-4Cu-2Sn composition sintered at 900℃ were similar to those obtained from Fe-6Cu compacts sintered at 1100℃. For the specimens with larger amounts of Sn, a significant decrease in tensile strength was observed. Therefore, it is concluded that the optimum ratio of Cu : Sn is 2 : 1. The microstructures of the sintered specimens are presented and an attempt is made to relate these to the mechanical properties and dimensional change after sintering.

유색감자 추출물의 항돌연변이 및 항암 활성

박영은,정진철,조현묵,황영선,이현진,최수산나,이수진,박은선,고은아,김난솔,임정대,정명근 한국작물학회 2008 한국작물학회지 Vol.53 No.1

본 연구는 괴경 내부에 적색 및 보라색의 안토시아닌 색소를 함유한 유색감자의 추출물을 대상으로 S. typhimurium TA98과 TA100 균주의 돌연변이 유발여부를 확인하였고, 직접돌연변이원인 4-nitroquinoline-1-oxide(4-NQO)와 간접 돌연변이원인 bozo(a)pyrene(BaP)에 의해 유발될 수 있는 돌연변이에 대한 항돌연변이 활성과 6종의 인간 암세포주(전립선암세포주: LNCaP, 결장암 세포주: HCT-15와 SW-620, 위암 세포주: ACHN, 폐암 세포주: A549, 백혈병 세포주: MOLT-4F)를 대상으로 SRB 방법을 이용하여 항암활성을 비교하였다. 그 결과 유색감자 중 괴경 내부에 보라색의 안토시아닌을 다량 함유한 자영 품종이 다른 품종에 비해 높은 수준의 항돌연변이활성 및 항암활성을 나타내었으며, 특히 자영 품종의 추출물은 다른 세포주 보다 전립선암 세포주에 대한 항암활성이 특이적으로 우수한 양상을 확인하였다. 자영 품종의 추출물은 5ug/mL 이상의 농도에서 암세포의 증식을 억제할 뿐 아니라, 전립선암 세포주 LNCaP와 PC-3에 대해 세포사멸을 유발하는 결과를 Cell Death Detection ELISA와 TUNEL Assay로 확인하였고, 세포사멸과 연관된 유전자의 발현분석을 western blot으로 확인하였다. 이상의 결과에서 괴경 내부에 안토시아닌을 함유한 유색감자는 괴경 내부의 색상이 백색인 일반감자에 비해 강한 항돌연변이활성 및 항암활성을 나타내므로 유색감자는 기능성이 증대된 식용감자로서의 이용가치가 충분하며, 유색감자를 이용한 기능성식품 소재개발 및 의료산업의 신규소재화가 가능하리라 판단된다. Colored potatoes are an excellent source of dietary polyphenols including anthocyanins. Generally, anthocyanins from fruits and vegetables exhibit anti-carcinogenesis and anti-cancer properties in vitro test. This experiment was conducted to know the effects of colored potato extracts contained anthocyanins on antimutagenic activity and anticancer activity to six human cancer cell lines containing LNCaP (androgen-dependent) prostate cancer cells. Extracts of three colored potatoes ('Hongyoung', 'Jayoung' and 'Jasim') and the white potato ('Superior') cultivars were used in this study. The extracts of three colored potatoes inhibited the mutagenicities induced by direct mutagen such as 4-nitro-quinoline-1-oxide (4-NQO) and another indirect mutagens of bezo(a)pyrene (BaP). Also, the extracts of 'Hoyoung' and 'Jayoung' showed higher antimutagenic activity than 'Jasim' and 'Superior' against to direct or indirect mutagen on both strains of TA98 and TA100. The activity of growth-inhibitory of extract of four potato cultivars were screened by SRB (sulphorhodamine B) method on diverse human cancer cells representing different types of cancers. Among the extract of four potato cultivars, the extract of 'Jasim' showed moderate inhibition on proliferation of LNCaP, ACHN and MOLT-4F cells and did not inhibit the proliferation of other cancer cells. On the other hand, extract of 'Superior' did not inhibit the proliferation of any tested cancer cell lines. However, the extracts of 'Hongyoung and Jayoung' inhibited the proliferation of cancer cells with GI50 values ranging from 2.5 to 30~;~mug/mL . On the basis of the GI50 values, it is clear that LNCaP cells were more sensitive to extracts of colored potato cultivars than other cancer cells. The extract of 'Jayoung' at 30~;~mug/mL were more active and inhibited cell proliferation, and induced apoptosis in LNCaP cells. This result revealed that the extracts of colored potatoes are expected to be good candidate for development into source of antimutagenic and anticancer agent.

조건 평균법에 의한 난류 예혼합 화염편 구조와 전파 속도 예측

박영도(Yeongdo Park),허강열(Kang Y. Huh) 한국연소학회 2021 한국연소학회지 Vol.26 No.4

A governing equation is derived from the equation of the reaction progress variable for the conditional flamelet structure and the turbulent burning velocity in turbulent premixed combustion. Direct numerical simulations are conducted for constant density flames to validate the newly derived conditional flamelet equation. Good agreement is shown between the conditional flamelet equation and the flamelet structures and turbulent burning velocities from DNS. They are validated for laboratory flames as well by numerical solutions of the modified laminar premixed flame code in Cantera. Reasonable agreement is shown with a tuning constant for turbulent diffusivity to consider the uncertainty involved in each experimental setup and conditions in the references.

양방향제어를 이용한 풍력발전용 DFIG의 특성

박영도(Young-Do Park),이우석(Woo-Suk Lee),서영택(Young-Taek Seo),오철수(Chul-Soo Oh) 대한전기학회 2000 대한전기학회 학술대회 논문집 Vol.2000 No.7

특집 : 「 동해 」 지명에 대한 지리학 세미나 ( Special Issue : Seminar on the Name of the Tong Hae ( East Sea ) )

박영한 대한지리학회 1992 대한지리학회지 Vol.27 No.3

남자 노인수형자의 회심체험 연구

박영의,한재희 한국상담학회 2012 상담학연구 Vol.13 No.3

본 연구는 남자 노인수형자들의 체험을 심층 탐색해 봄으로써, 위기 상황에서 겪는 마음의 변화에 대한 현상을 밝혀보고자 하였다. 이를 위해 K교도소의 60세 이상의 남자 노인수형자 10명을 대상으로 ‘자아를 찾아가는 미술 여행’이라는 프로그램을 실시하였고, 프로그램이 진행되는 동안 90분에서 120분 사이의 개별면담이 1회에서 2회 정도 이루어졌다. 회심 체험의 본질을 보다 잘 드러내기 위한 연구의 틀로 Van Manen의 연구 방법을 사용하였으며, Van Manen이 제시한 생활세계의 네 가지 실존체 즉, 체험된 몸, 체험된 공간, 체험된 시간, 체험된 관계에 따라 남자 노인수형자들의 회심의 경험 구조를 해석학적 현상학적으로 분석하여 140개의 구성의미와 27개의 주제, 그리고 13개의 본질적 주제를 산출해 내었다. 결론적으로 본 연구를 통하여 살펴본 회심은 좌절과 고통의 시간을 바탕으로 만나게 되는 실존적 문제였으며, Jung의 개성화 과정으로 나아가는 성장의 기회였다. 즉, 회심은 끊임없이 올라오는 대극적인 갈등으로 분열되었던 자신과 하나됨으로써 결국 자기(self)를 찾아가는 길이며, 타인과 더불어 하나 되는 길이자, 신과의 합일을 향하는 과정이었다. The purpose of this study is to find out what change in mind people experience in times of crisis by examining the experiences of senior convicts. This study has sampled 10 senior convicts 60-year old in the “K” Detain Center. They have been tested with a therapy called, “Trip with Art in Search of Oneself”. Interview took place between 90 and 120 min once or twice per individual during the art therapy. Van Manen research method has been taken in order to reveal the conversion. The structure of the conversion experienced by the senior convicts has been analyzed with the analytical phenomenology so as to extract 140 composition meanings, 27 subjects and 13 basic themes. This study demonstrates that the conversion has been an existential problem based on the time of frustrations and pains and an opportunity for a growth towards the process of Individuation.

카자흐스탄 최초의 무성영화 <켈린>에 재현된 고대 튀르크 전통과 텡그리(Tengri) 신앙

박영은(Park, Young Eun) 한국영화학회 2012 영화연구 Vol.0 No.53

This paper aims at analyzing Ermek Tursynov’s film <Kelin> through the category of ancient Turkish history and tradition, primitive faith and tengri belief, and the representation of a belief in the coexistence of life in order to examine how the film works as a driving force for the recovery of Kazakhstan’s identity in the post-Soviet era. It is one of the most important current trends of Kazakhstan’s film industry to revive the spiritual and cultural heritage of Central Asian mythology and folk beliefs, which had been forbidden for the Soviet period. From this perspective it is clear that the revival of the heritage of Central Asia will be a valuable subject. In this film, first of all, an attention should be paid to the structure of mise en scene, of which the director takes advantage to represent his confidence in the spirit and power of the Turks. He presents the relationship between nature and humans through continuous close-up shots, creates the atmosphere of animistic world through the bird’s eye view, and establishes an aura of shamanism through the eyes of wolves and falcons, the totems of the Turks. Of all things, we should take the fact that <Kelin> is a silent film into consideration, in which appears no difference between the language of human and the sounds of animals. These are to reflect the intention of the director, who tries to highlight the world that animals and humans live in harmony with each other. <Kelin> is not a simple film which reproduces the ancient customs of the Turks, but a film with strong messages. What the director Ermek Tursynov tries to reestablish in this film is new values for the future of Kazakhstan since he believes that it is possible for the present and the future generations of Kazakhstan recovering their national identity only when they are able to keep the memories of the past.

Clarel : 神과 믿음의 추구 - Silence is the only Voice of our God

박영의 한국중앙영어영문학회 1986 영어영문학연구 Vol.28 No.1

아나톨리 김의 생명철학

박영은(Park Young Eun) 한국노어노문학회 2004 노어노문학 Vol.16 No.1

이선율(%)을 이용한 고속철도 전차선로 성능평가 기술 동향

박영,Park, Yeong 한국전기전자재료학회 2015 전기전자재료 Vol.28 No.12