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      • 지구상의 물의 기원

        이민성 한국지하수토양환경학회 1994 지하수환경 Vol.1 No.2

        1957년 인류중 처음 외계로부터 지구를 바라본 소련의 우주비행사 가가린은"지구는 푸르다"라고 말했다. 이 우주에는 무수한 행성이 있지만 그중에서 단 하나 지구만이 그 표면에 가득히 물을 저장하고 있다. 따라서 지구를 물의 행성이라고도 한다. 그런데 어째서 지구에만 물이 존재하며, 그 물의 기원은 무엇인가. Table 1에 지구 수권에 있어서의 물의 분포가 표시되어 있다. 이를 보면 지구상의 물의 중요도는 해양, 만년빙 또는 빙하 그리고 지하수의 순임을 알 수 있다. 따라서 우리들은 육지에 있어서 지하수의 중요성을 다시 인식해야 할 것이다.식해야 할 것이다.

      • SCOPUSSCIEKCI등재

        전두골 전이성 간암 병소에 대한 수술전 미세백금코일을 이용한 색전술 : 증례 보고 Case Report

        이민성,신형식,이규호 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.10

        Surgical removal of bone metastasis from hepatocellular carcinoma frequently produces profuse bleeding. To reduce bleeding, we have performed preoperative embolization of tumor feeding artery with flow-dependent micro-platinum coils during superselective angiography in a case of frontal bone metastasis from hepatocellular carcinoma. The tumor was removed easily with minimal bleeding after the embolization, so we report the case with review of the relevant literature.

      • SCOPUSSCIEKCI등재

        외상성 뇌경막하수종의 임상적 양상과 ^(99m)Tc-HMPAO SPECT를 이용한 뇌혈류와의 비교 고찰

        이민성,민보열,김성민,최기석,유동진,오명수,김철희,김윤모 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.8

        Measurement of regional cerebral blood flow with single photon emission computed tomography(SPECT1'was pedomed using wc-HMPAO in 16 patients with traumatic subdural hygroma, and we investigated the relationships bemeen the results and the initial clinical findings and clinical outcomes on 4-months after injury. In patients with complex subdural hygroma, i m m e n t of perfusion on fonOw up SPECT was correlated with the clinical outcome. But in patients with simple subdural hygmma, the clinical outocmes were good regardless of cerebral perfusion on initial SPECT and cerebral hypoperfusion was improved on follow up SPECT in all patients These results suggested that associated parenchymal injury, initial perfusion of the hntal cortex, and improvement of perfusion on follow up SPECT were good indicators of clinical outcome. In conclusion, HMPAGSPECT can be helpful in predicting the prognosis and assessing the effect of surgical treatment in patients with mumatic subdural hygroma

      • 배역 교환을 통한 성 역할 전복 : Caryl Churchill의 Cloud Nine을 중심으로

        이민성 新羅大學校 人文科學硏究所 2000 白楊人文論集 Vol.5 No.-

        Churchill, one of the socialistic feminist dramatists, attempts various experimental stages and dramatic techniques to develop her message. This paper traces Churchill's Cloud Nine, which shows maturity and perspective in the development of Churchill's craft, in the context of 'cross-casting' and 'doubling' of her dramatic techniques. In this play, she shows the inconformity between an actor's gender and role, and suggests that gender role is not biological factor but a product of social and cultural ideologies, by exchanging the sex of characters (cross-casting). In Act One, she shows several examples of cross-casting such as an actor playing the role of a woman, an actress playing the role of a man, and a white actor playing the role of a black man, etc. Through this technique, the audience recognizes the oppressed selves of characters. In Act Two, the characters of Act One are recasted (doubling) and described as liberated selves of characters through right-gendering and changing their clothes with one another. But now they are confused between the conventional role and the expectable role and are still searching for their own selves. With doubling and cross-casting to make intricate connections between different contexts, Cloud Nine reflects many possibilities inherent in the real world, and these possibilities subvert conventional ideas about the individuality or integrity of character. But she doesn't suggest any solution but just the possibility of change. Open-endedness makes the audience reflect on what they are seeing and rethink their established roles.

      • The effect of surface silanization on selective catalytic reduction catalysts

        이민성,김선이,김태효,이덕현 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

        Recently, the regulations of atmospheric pollutants have been tightened in the environmental field. NOx is a generic term for the nitrogen oxides that are most relevant for air pollution. Selective catalytic reduction (SCR) catalysts have been used to remove NOx. Commercially, V2O5- WO3/TiO2 catalyst were applied for the SCR catalysts, however, they have been suffered with low NOx removal efficiency under the presence of water. In this study, the surface of SCR catalyst was treated with silanization process. The SCR catalyst was synthesized by impregnation method, and the surface of SCR catalyst was coated through the vaporization of silane. The synthesized catalysts were evaluated through fixed bed reactor, and they were characterized by SEM, XRD, NH3-TPD, and FT-IR. The prepared catalyst showed enhanced NOx removal efficiency compared to the raw SCR catalyst, and the process may be applied to the various fields that require the hydro-resistive properties of catalytic surface.

      • KCI등재

        옥천계(沃川系) 함(含)우라늄 탄질암중(炭質岩中)의 우라늄의 존재상태(存在狀態)와 광물종(鑛物種)

        이민성,김상욱,Lee, Min Sung,Kim, Sang Wook 대한자원환경지질학회 1985 자원환경지질 Vol.18 No.2

        The radioautographing of U-bearing cloaly slate samples were initiated in order to clarify the uranium distribution patterns in the samples of Ogcheon system. Moreover, x-ray powder diffraction and x-ray single crystal analysis studies were undertaken to identify the uranium mineral which was extracted from U-bearing coaly slate. The handspecimens were collected from the Boseong mine, located in Deokpyeong area, Goesan-gun, Chungcheongbug-do. According to the experimental studies, it has been found the following facts: (1) fixed carbon has close relation with uranium contents, (2) quartz veins developed in U-bearing coaly slate are diveded into two groups based on mode of occurrence, formation stage and uranium distribution pattern; early quartz vein ($QV_1$) with low uranium concentration and late quartz vein ($QV_2$) with high uranium concentration, (3) matrixes around $QV_1$ are displayed homogeneous and high uranium concentration, while matrixes around $QV_2$ are low uranium concentration, (4) uranium mineral is identified as a variety of autunite.

      • KCI등재

        쇼핑관광객의 쇼핑몰 선택속성에 대한 IPA와 Borich 요구도 비교분석: 동대문쇼핑몰을 중심으로

        이민성,정경일 한국관광연구학회 2022 관광연구저널 Vol.36 No.8

        The purpose of this study was to identify customer satisfaction and dissatisfaction factors through importance- performance analysis for the selection attributes of shopping tourists who had visited a Dongdaemun shopping mall, and to suggest a plan to revitalize Dongdaemun shopping malls by enhancing customer satisfaction. For the questionnaire on shopping mall selection attributes, 20 items were selected based on prior research, and the survey was conducted to shopping tourists who had visited one of five shopping malls in Dongdaemun. A total of 247 copies were used for empirical analysis. The empirical analysis of the collected data was carried out in three steps. The first step, the significance of the difference, was verified by performing a corresponding-sample t-test on the selection attributes using SPSS. Based on this, two urgent improvement items were derived through the IPA matrix. In the second step, based on the descriptive statistics of the importance and performance with respect to the selection attributes, the Borich requirement for content level was calculated using Excel, and the order of the requirements for each item was derived. In the third step, based on the descriptive statistics of the importance-performance of the selection attributes, six urgent improvement requirements were derived through the locus for focus model using SPSS. Based on the results of the three-step analysis, six items were selected as urgent improvement requirements for Dongdaemun shopping malls: sales staff friendliness, exchange and refund services, parking convenience, price reasonability, product quality, and product design. 본 연구는 동대문 쇼핑몰을 방문한 쇼핑관광객을 대상으로 쇼핑몰 선택속성의 중요도-만족도 분석을 통하여 고객의 만족요인과 불만족 요인을 파악하고, 고객만족 제고를 통해 동대문 쇼핑몰의 활성화 방안을 제시하고자 하였다. 쇼핑몰선택속성에 대한 설문 문항은 선행연구를 바탕으로 20문항을 선정하였고, 조사표본은 동대문 쇼핑몰 5곳중 한 곳을 방문한 쇼핑관광객을 대상으로 선정하였으며 설문조사에서 수집된 247부를 실증분석에 사용하였다. 수집된 자료의 실증분석은 3단계로 진행하였으며, 1단계로 SPSS를 이용하여 쇼핑몰 선택속성의 중요도-만족도에 대한 대응표본 t-검정을 실시하여 차이에 대한 유의성을 검증하였으며, 이를 바탕으로 IPA 매트릭스를 통하여 시급한 개선항목 2가지를 도출하였다. 2단계로 선택속성에 대한 중요도와 만족도의 기술통계를 바탕으로 Excel을 이용하여 Borich요구도를 산출하고 항목별 요구도 순위를 도출하였다. 3단계로 선택속성의 중요도-만족도와 중요도의 기술통계를 바탕으로 SPSS를 이용하여 The Locus for Focus 모델을 통하여 시급한 개선 요구항목 6가지를 도출하였다. 이러한 3단계 분석 결과를 바탕으로 동대문 쇼핑몰의 시급한 개선요구항목으로서, 판매직원 친절성, 교환 및 환불서비스, 주차편리성, 판매가격 적절성, 판매상품품질, 판매상품디자인 등 6가지를 선정하였다.

      • KCI등재

        Cu-Fe-Sn-S계(系) 광물(鑛物)의 산출상태(産出狀態)와 상안정관계(相安定關係)

        이민성,Lee, Min Sung 대한자원환경지질학회 1980 자원환경지질 Vol.13 No.4

        Stannite is mainly found in hypothermal ore deposits, whereas mawsonite and stannoidite occur characteristically with bornite and chalcopyrite in subvolcanic (xenothermal) ore deposits. Mawsonite always shows the replacement on the rims of stannoidite grains or along the grain boundaries of stannoidite, bornite and chalcopyrite. In the Tada mine, Japan, the following mineral assemblages of the Cu-Fe-Sn-S minerals were observed. 1) bornite-stannoidite; 2) stannoidite-chalcopyrite; 3) stannite-chalcopyrite; 4) bornite-mawsonite-stannoidite; 5) bornite-stannoidite-chalcopyrite; 6) mawsonite-stannoidite-chalcopyrite; 7) stannoidite-stannite-chalcopyrite; 8) bornite-mawsonite-stannoidite-chalcopyrite The heating and D.T.A. experimental results indicate that natural stannoidite containing 3 weight percent of zinc decomposes to bornite, stannite and chalcopyrite at above $500^{\circ}C$, whereas zinc-free synthetic stannoidite is stable up to $800^{\circ}C$. The stability temperature of zincian stannoidite depends on the zinc content. Mawsonite is stable at temperatures below $390^{\circ}C$ and decomposed to stannoidite, bornite and chalcopyrite above it. According to the sulfur fugacity determination by the electrum tarnish method the univariant assemblage of mawsonite, bornite, stannoidite and chalcopyrite requires a higher sulfur fugacity than that of bornite, stannoidite and chalcopyrite assemblage.

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