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      • KCI등재

        茶山의 文學思想

        李基潤 陸軍士官學校 1981 한국군사학논집 Vol.21 No.-

        We knew Dasan(茶山) as a philosopher of Silhak(實學). In this paper, I want to find out his views on the literature of his lifetime. In recent years, such view points are seen on other studies of Dasan. The theory of korean literature starts from the establishment of the old Koream's literary thoughts, and for the establishment, as we know, it will be possible to pr-ocede the study of the personal literary thoughts. We can find his literary view points in Munchecheck(文體策) and Ohhakron(五學論). In Munchecheck, he insisted that literature at first shows “Do(道)” for the peo-ple. This means a method which practices the Kyungsaechiyong(經世致用) and Riyonghuseng(利用厚生). In Ohhakron,, he insisted literature be fitted for the ethics and Current Consciousness. The more important view points in Ohhakron is not the imitation of Chinese lierature, but finding out the national literature. SO he acclaimed for the “Poem of Chosun(朝鮮詩)”. He also insisted the real literature be based on the experience in his other works. Such view points in his literary theory looks like Confucian literature, but flows his own revolutionary thoughts in his works.

      • 열연신 공정중 폴리에틸렌 테레프탈레이트 단사의 성질 연구 : Ⅱ. 열수축과 기계적 성질 Ⅱ. Shrinkage and Mechanical Property

        이기윤,김성철 忠南大學校 産業技術硏究所 1993 산업기술연구논문집 Vol.8 No.1

        Shrinkage and mechanical property changes were evaluated during the course of extrusion and hot stretching processes of Poly (ethylene terephthalate) monofilament fibers in this study. Poly (ethylene terephthalate) chips were extruded at 260-275℃ through a monofilament die and the extruded monofilaments were quenched at different temperatures (0-40℃). These quenched monofilaments were then stretched at a hot water bath (temp. 70-90℃, stretch ratio from 1:1 to 1:6). The stretched monofilaments were then thermally treated at 195℃ for 30 minutes to measure shrinkage. The general trends were that Yield stress, ultimate tensile stress and modulus showed decrease in the range of stretch ratios from 1:1 to 1:2 while they all showed linear increase from stretch ratios of about 1:2 to 1:6. A maximum shrinkage was noted at the stretch ratios between 1:2 to 1:3 (max. 45%) at 80℃ stretching condition. This could be attributed to the combined effect of increased orientation and increased degree of crystallinity at high stretch ratios.

      • 경질 PU 발포공정에 있어서 유동 해석의 교육용 프로그램 개발

        이기윤 충남대학교 공업교육연구소 2002 論文集 Vol.25 No.1

        본 연구에서는 basic, bank 몰드에서의 경질 폴리우레탄 폼의 흐름을 연구하여 교육용 프로그램을 개발하였다. 실험에서의 유동행위와 밀도분석결과를 시뮬레이션 결과와 비교하였다. 사이클로펜탄은 물리적 발포제로 결질 폴리우레탄을 발포하는데 사용하였으며 상온에서 hand mixing으로 4000rpm으로 4sec의 범위 안에서 혼합하였다. 폴리우레탄 폼은 800×200×25의 basic 몰드에 방사되었다. 몰리우레탄 폼은 몰드내에서 연속적으로 흐른다. 밀도분포를 보면 코어와 스킨의 밀도는 0.0267 g/cm3, 0.0543 g/cm3를 나타냈다. bank 몰드에서는 폴리우레탄 폼의 유동은 bank의 앞에서 V-type의 흐름을 보인다. 밀도분포를 보면 0.0346 g/cm3, 0.0825 g/cm3를 나타낸다. The flow of rigid polyurethane foam in basic, bank mold was studied. Flow behaviour and density distribution of experiment are compared with simulation results. The cyclopentane was used for polyurethane foam as a physical blowing agent. After the composition was hand-mixed at about 4000 rpm within 4 seconds at room temperature,Polyurethane foam was poured into basic mold(800×200×25). In basic mold, polyurethane foam was flowed in mold continuously. In density distribution, densities of core and skin were 0.0267 g/cm3 and 0.0543 g/cm3, respectively. In bank mold, flow of polyurethane foam was V type' s melt front at bank. Densities of core and skin were 0.0346 g/cm3 and 0.0825 g/cm3, respectively in density distribution.

      • KCI등재

        3기 직장암 환자에서 림프절 피막 침윤이 예후에 미치는 영향

        이기윤,신진용,오상훈,홍관희 대한대장항문학회 2009 Annals of Coloproctolgy Vol.25 No.3

        Purpose: Extracapsular invasion (ECI) of nodal metastasis is reported to be a prognosticator of colorectal cancer. However, limited knowledge exists about the prognostic value of ECI in stage III rectal cancer. Methods: From January 1996 to June 2004, 202 stage III rectal cancer patients who underwent surgery were enrolled in this study. The patients were divided into two groups according to ECI (patients with ECI, ECIP, n=122; patients without ECI, ECIN, n=80). The potential prognostic factors were compared in a Cox model. Results: Of 916 positive nodes examined, ECI was seen in 46.7% of the positive nodes. The univariate comparison between the two groups revealed the five-year results after a median follow-up of 48.0 mo. The local control rate of ECIP did not show a significant difference from that of ECIN (77.0% vs. 85.4%, P=0.550). The disease-free survival rate and the overall survival rate differed for the two groups, with rates of 44.1% and 50.0% for ECIP and 70.4% and 63.2% for ECIN (P<0.001, P=0.049, respectively). The impact of ECI on the disease-free survival was confirmed in a Cox model. In a subgroup analysis, no significant differences in the recurrence and the survival rates were seen between the N1 ECIP and the N2 ECIN subgroups. Conclusion: Although ECI is not a risk factor for survival and local relapse, ECI is a prognosticator of overall recurrence. Based on these findings, more aggressive adjuvant treatment seems to be needed for decreasing the overall recurrence in stage III rectal cancer with ECI. Purpose: Extracapsular invasion (ECI) of nodal metastasis is reported to be a prognosticator of colorectal cancer. However, limited knowledge exists about the prognostic value of ECI in stage III rectal cancer. Methods: From January 1996 to June 2004, 202 stage III rectal cancer patients who underwent surgery were enrolled in this study. The patients were divided into two groups according to ECI (patients with ECI, ECIP, n=122; patients without ECI, ECIN, n=80). The potential prognostic factors were compared in a Cox model. Results: Of 916 positive nodes examined, ECI was seen in 46.7% of the positive nodes. The univariate comparison between the two groups revealed the five-year results after a median follow-up of 48.0 mo. The local control rate of ECIP did not show a significant difference from that of ECIN (77.0% vs. 85.4%, P=0.550). The disease-free survival rate and the overall survival rate differed for the two groups, with rates of 44.1% and 50.0% for ECIP and 70.4% and 63.2% for ECIN (P<0.001, P=0.049, respectively). The impact of ECI on the disease-free survival was confirmed in a Cox model. In a subgroup analysis, no significant differences in the recurrence and the survival rates were seen between the N1 ECIP and the N2 ECIN subgroups. Conclusion: Although ECI is not a risk factor for survival and local relapse, ECI is a prognosticator of overall recurrence. Based on these findings, more aggressive adjuvant treatment seems to be needed for decreasing the overall recurrence in stage III rectal cancer with ECI.

      • KCI등재
      • KCI등재

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