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C언어를 이용한 PCI Express 동작 모델 설계 및 검증
예상영,이광명,성광수 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.2
Today's and tomorrow's processors and I/O devices are demanding much higher I/O bandwidth than PCI 2.2 or PCI-X can deliver and it is time to engineer a new generation of PCI to serve as a standard I/O bus for future generation platforms. According to this demand the PCI SIG proposed PCI Express. This paper describes about the design of PCI Express Behavioral Model. A Behavioral Model enables the designers to test whether the design specifications are met by performing computer simulations rather than experiments on the physical prototype. In the proposed Model, we can verify whether our design concept satisfies the PCI Express functional protocol.
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마우스 대장암 모델 구축 및 항암제 활성 평가를 위한 예비 연구
김예솔,강봉석,이상은,이은주,이경록,정상헌,박정숙 충남대학교 약학대학 의약품개발연구소 2014 藥學論文集 Vol.29 No.-
Abstract – Aberrant crypt foci (ACF) are early imorphological changes observed in rodents after administration of colon-specific carcinogen such as azoxymethane (AOM). ACF are considered to be putative preneoplastic lesions and are widely used as a surrogate biomarker to rapidly evaluate chemopreventive potential of compounds. The size of colorectal cancer was evaluated after administration of three anticancer drugs, 1 parent drug and 2 prodrugs. The body weights of mice were measured daily and considered as a surrogate for evaluation of general wellbeing. Colons were removed, cut along the longitudinal axis and flushed with phosphate-buffered saline. Each colon was cut into three equal lengths and fixed flat between filter papers. The fixed colon sections were stained with methylene blue. The number of ACF per colon, the number of aberrant crypts observed in each focus and the location of each focus were recorded. After single administration of AOM and multiple doses of anticancer drugs, no significant changes in the body weights of the mice was observed which was recorded for 52 days. However, an expected ACF was not observed in any treated groups. These findings suggest the induction of ACF in mice requires the promotion by dextran sulfate sodium as well as the initiation by AOM.
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Sn-Ni 합금도금층의 조성 및 우선방위에 미치는 파형전류 전해의 영향
예길촌,지장훈,박성진 영남대학교 공업기술연구소 1999 工業技術硏究所論文集 Vol.27 No.1
The effect of pulse current parameters on the composition and preferred orientation of Sn-Ni alloy electrodeposits was studied. The cathode current efficiency of P.C. electrolysis decreased with the increase of mean current density and off-time and was lower than that of D.C. electrolysis condition. The tin content of the alloy electroplated in the bath of low Sn ratio(0.2) decreased with increasing mean current density, while the one of the alloy with high Sn ratio(0.5) increased. The tin content of alloy increased steadily with off-time. The preferred orientation of the alloy changed from (110)+ (101) or (110) to (002) or (101) with increasing peak current density for the alloy deposits plated from both the bath of low Sn ratio and the one of high Sn ratio respectively
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이예성 경주대학교 2001 論文集 Vol.14 No.-
The purpose of this study is to show that, even before the 19th century English Romantic age, the tradition of English literature and English spiritual life is romanticism, and the British traditional view of nature is also romantic, and that some ecological ideas are revealed in the English romantic view of nature. It may be that ecological ideas are essentially romantic. Some ecological ideas in English romantic poems can be a ray of hope for resolving today’s environmental crisis. For this purpose, this study tries to reveal some romantic elements and ecological ideas by introducing some critical views and examining one English medieval poem and several English Pre-romantic poems, especially nature poems, written before the 19th English Romantic age. Some critical views include Nick Frankel’s view on Oscar Wilde’s literary world, John Ruskins’s and Laurence Binyoun’s stresses on the romantic view of nature in the Northern tradition to which England’s civilization belongs, F. E. Spurgeon’s stress on English mysticism, and, especially, the arduous debates between a romantic John Middleton Murry and a classicist T. S Eliot on Romanticism and Classicism as the tradition of English literature and English spiritual life. Murry argued that “Romanticism…is itself the English tradition: it is national, and it is the secret source of our own peculiar vitality.” This study takes sides With Murry in this argument. And for the purpose of this study, some poems from the English medieval age to English pre-romantic age are examined roughly. After examining one medieval poem traditionally by Taliesin and several poems of the English Neo-classic and English Pre-romantics, it can be said that the English people have almost consistently had a romantic view of nature, believing in the divinity of nature and in the special affinity between man and nature, even in the English Neo-classic age of the 18th century, and that such mystical thought and mystical attitude are curiously persistent in English literature. What is interesting, Murry’s romantic view of nature and his ecological attitude are most similar to those of William Wordsworth. Matthew Arnold praised Wordsworth as “one of the very chief glories of English poetry”, and at best, as the spirit of English poetry. Thus it can be said that Wordsworth’s romantic view of nature may seem to be more central to the elucidation of the tradition of English literature and English spiritual life and of the traditional view of nature in England than to that of most others. The world of Wordsworth’s poetry is of immense importance in English Romanticism. As E. C Semple said, “man is a product of the earth’s surface.” But man has been regarding himself as the central fact of the universe and has thought that he is entitled to conquer or exploit nature at will. Such an anthropocentric interpretation of the universe is responsible for today’s life-threatening ecological problems. These problems can be solved only through a revolution of our attitude toward nature. Now it is necessary to think that man is a part of nature, that he is not the master of the earth but a product of it, and that he must find special affinity between him and nature. We can see this kind of ecological vision also in Wordsworth’s romantic idea of nature and his ecological attitudes toward nature. He respected Nature. He had a sense of the sacredness of the created world. He gained his revelation of divinity through nature. He thought of nature as a spiritual existence or as having personality, and he developed a faith in the beneficient power of nature to heal and cleanse man’s psyche. And, especially, he emphasized the organic interrelatedness between man and nature. He regarded man as a part of nature and believed in the coherence of all beings. He tried to see “one life” or “mighty unity” in all thing of nature. So men are unified with them in his world. At his best, Wordsworth’s poetry is the visionary expression of eternity or permanence through the beauty of wild nature. In a sense, he gave man warning against the anthropocentric arrogance. There is a grain of truth in his romantic ideas. In this respect, Wordsworth’s romantic view of nature will help modern men work out an answer to the today’s ecological problems.
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양측성 고정원을 이용한 이소 맹출의 치료에 대한 증례 보고
선예경,심연수,안성인 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.2
제 1 대구치의 이소 맹출이란 제 1 대구치가 비정상적인 맹출 경로를 취해 제 2 유구치의 비정상적인 조기 흡수를 일으키는 경우를 뜻한다. 비가역적 이소 맹출의 경우 제 2 유구치의 조기상실은 공간 상실, 제 1 대구치의 근심 경사, 제 2 소구치의 함몰, 총생과 대합치의 과맹출등을 야기 시킨다. 치료의 주목적은 (1) 제 2 유구치의 조기 상실을 막아 공간 유지의 역할을 하게하고 (2) 상실된 치열장을 회복해 제 2 소구치의 정상적인 맹출을 돕는 것이다. 치료 방법은 제 1 대구치의 맹출 정도, 제 1 대구치의 위치 변화, 제 1 대구치가 걸려있는 제 2 유구치의 enamel ledge 양, 제 2 유구치의 동요도, 동통이나 염증의 유무에 의해 결정된다. 제 1 대구치의 근심 경사의 치료에 사용되는 대부분의 편측성 장치는 결과적으로 공간 상실을 증가시키는 힘을 가하게 된다. 따라서 고정원의 보강을 위해 holding arch와 같은 양측성 고정원의 사용이 추천되고 있다. 본 증례 보고는 삼성 서울 병원을 내원한 환아 중 제 1 대구치의 비가역적 이소 맹출로 제 2유구치의 치근 흡수와 동요도 증가를 보이는 환아에서 양측성 고정원을 이용한 장치를 사용해 제 2 소구치의 정상적인 맹출에 필요한 충분한 공간을 유지할 수 있었기에 이에 보고하는 바이다. Ectopic eruption of the first permanent molar means the first permanent molar assumes an atypical path of eruption resulting in premature atypical resorption of the second primary molar. If the reversible eruption does not occur, early loss of the second primary molars results in space loss, mesial tipping of the first permanent molar, impaction of the second premolar, buccal segment crowding and overeruption of opposing tooth. The main objectives of treatment are (1) to prevent loss of the second deciduous molars so it can continue to serve as a space maintainer and (2) to regain lost arch length, allowing the second premolar to erupt into normal position. The optimal treatment approach depends on a number of factors including the clinical eruption status of/6/, the change in position of/6/, the amount of enamel ledge of/E/ entrapping/6/, the mobility of/E/, and the presence of pain of infection. Unilateral appliance to correct the mesial angulation of ectopic permanent first molars, as in the majority of the appliance designs, would produce a resulotant force that would further enhance the space loss. A bilateral support similar to the holding arch design is recommended to maximize the anchorage. These case reports present the successful result of preserving space for the second premolar in treatment of ectopic eruption of the first permanent molar using Halterman appliance with bilateral anchorage on patients visting department of pediatric dentistry in Samsung Medical Center.
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