섬유보강 콘크리트의 내화도에 따른 압축강도의 특성에 관한 연구

김민국,최진석,조철희,조창호,손순채,김정섭 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2

This paper is a experimental study to understand the properties of compressive strength according to fire resistance of fiber reinforced concrete mixed with fiber reinforcement. The materials for fiber reinforcement are polypropylene fiber, steel fiber, and cellulose fiber, a natural fiber. Destructive and non-destructive test are conducted to compute the material age classified compressive strength of each reinforced fiber. Fire resistance experiment was conducted by destructive and non-destructive experiment after fire resistance experiments at 300, 600, and 900 degree on 180 days material aged specimen. The conclusions generated by the experiment of compressive strength and fiber resistance according to the material ages of the concrete which is fiber reinforced are as follows: 1) Fiber reinforced concrete presented low strength compared with non-reinforced one from destructive compressive strength test. 2) Fiber reinforced concrete except cellulose fiber generally presented a little bit low strength compared with non-reinforced one from non-destructive compressive strength test. 3) Steel fiber rose 7.8% polypropylene fiber rose 3.2% and sellulose fiber rose 30.5% compared with non-reinforced concrete at 300 degree from destructive compressive strength experiment after fire resistence experiment. Cellulose fiber reinforced concrete was appeared most excellent in fire resistence as 23.6% higher strenth than any other fiber reinforced concrete. 4) Cellylose fiber reinforced conctete rose 14.6% compared with fiber non-reinforced concrete from the non-destructive compressive strength experiment after fire resistence experiment at 300 degree.

원로 발명가 탐방(인터뷰)-삼화이엔지(주) "김인석 회장"

김민국,Kim, Min-Guk 한국발명진흥회 2007 發明特許 Vol.33 No.1

원로 발명가 탐방(인터뷰)-(주)닥터위콤 윤만희 회장

김민국,Kim, Min-Guk 한국발명진흥회 2008 發明特許 Vol.33 No.2

섬유시트로 보강된 콘크리트의 압축강도 특성에 관한 실험적 연구 ( An Experimental Study on the Compressive Strength Characteristics of Concrete Strengthened with Fiber Sheets )

김민국,박영배,조창호,김정섭 대한건축학회 2002 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.22 No.1

Risk Assessment of 5-Chloro-2-Methylisothiazol-3(2H)-One/ 2-Methylisothiazol-3(2H)-One (CMIT/MIT) Used as a Preservative in Cosmetics

김민국,김규봉,이주영,곽승준,권용찬,강지수,김형식,이병무 한국독성학회 2019 Toxicological Research Vol.35 No.2

The mixture of 5-chloro-2-methylisothiazol-3(2H)-one (CMIT) and 2-methylisothiazol-3(2H)-one (MIT), CMIT/ MIT, is a preservative in cosmetics. CMIT/MIT is a highly effective preservative; however, it is also a commonly known skin sensitizer. Therefore, in the present study, a risk assessment for safety management of CMIT/MIT was conducted on products containing 0.0015% of CMIT/MIT, which is the maximum MIT level allowed in current products. The no observed adverse effect level (NOAEL) for CMIT/MIT was 2.8 mg/kg bw/day obtained from a two-generation reproductive toxicity test, and the skin sensitization toxicity standard value for CMIT/MIT, or the no expected sensitization induction level (NESIL), was 1.25 μg/cm2/day in humans. According to a calculation of body exposure to cosmetics use, the systemic exposure dosage (SED) was calculated as 0.00423 mg/kg bw/day when leave-on and rinse-off products were considered. Additionally, the consumer exposure level (CEL) amounted to 0.77512 μg/cm2/day for all representative cosmetics and 0.00584 μg/cm2/day for rinse-off products only. As a result, the non-cancer margin of safety (MOS) was calculated as 633, and CMIT/MIT was determined to be safe when all representative cosmetics were evaluated. In addition, the skin sensitization acceptable exposure level (AEL)/CEL was calculated as 0.00538 for all representative cosmetics and 2.14225 for rinse-off products; thus, CMIT/MIT was considered a skin sensitizer when all representative cosmetics were evaluated. Current regulations indicate that CMIT/MIT can only be used at concentrations 0.0015% or less and is prohibited from use in other cosmetics products. According to the results of this risk assessment, the CMIT/MIT regulatory values currently used in cosmetics are evaluated as appropriate.

한국어 비주격 주어 표지의 문법화 - 존재 구문 및 탈격을 기원으로 하는 형식을 중심으로 -

김민국 배달말학회 2019 배달말 Vol.65 No.-

In this article, we examine diachronic development of case markers of non-nominative subject eyse, (i)se, (u)rose, kkese and argue its grammaticalization from a cross-linguistic perspective. Discussion of this article is summarized as follows. First, on closer examination of preceding research and example from historical corpus, we conclude that (u)rose, (i)se originate from existential constructions and eyse, kkese originate from both existential constructions and ablative. Second, we can explain unusual synchronic property of non-nominative subject reasonably through its diachronic origin. In other words, synchronic property of non-nominative subject is good reason to determine origin of non-nominative subject case markers. Third, grammaticalization of case markers of non-nominative subject which originate from existential constructions is result of combination of pragmatic functions of existential constructions and grammaticalization of subject. Grammaticalization of case markers of non-nominative subject which originate from ablative case result from similarity between Source and Agent. However ablative subject integrated into locative subject because Source is a kind Location. As a result, case markers of non-nominative subject which originate from existential constructions survive alone. 이 연구에서는 비주격 주어 표지 ‘에서’, ‘(이)서’, ‘(으)로서’, ‘께서’를 대상으로 이들의 통시적 발달 과정을 추적하고 주어의 범언어적 속성에 비추어 그문법화 과정에 대해 논의하였다. 본고의 논의는 크게 세 가지로 요약된다. 첫째, 기존 연구와 역사 자료를 종합적으로 검토한 결과, 비주격 주어 표지‘(으)로서’, ‘(이)서’는 존재 구문에, ‘에서’와 ‘께서’는 존재 구문과 탈격에 모두기원을 두고 있음을 알 수 있다. 둘째, 비주격 주어 표지의 통시적 기원을바탕으로 현대 한국어의 공시적 문법 양상을 보다 합리적으로 설명함으로써역사 자료의 예를 통해 밝히지 못한 통시적 기원에 대한 근거를 보다 정교히마련하였다. 셋째, 존재 구문에서 기원한 비주격 주어 표지의 문법화는 주제표시라는 존재 구문의 화용적 기능과 주어의 문법화라는 두 가지 요인이 상호 작용한 결과이다. 탈격 표지가 주어 표지로 문법화하는 요인은 출발점과행위주의 유사성이다. 그러나 ‘출발점’은 ‘처소’의 한 종류이므로 탈격 주어는처소격 주어에 합류되는 양상을 보이는데, 이는 현대 한국어의 비주격 주어표지가 대개 존재 구문에 기원을 둔 것만 남아 있는 이유를 잘 설명해 준다.

원로 발명가 탐방(인터뷰)-한국의 에디슨 "신석균"

김민국,Kim, Min-Guk 한국발명진흥회 2007 發明特許 Vol.32 No.8

'한국의 에디슨', '발명의 천재' 이것은 세계 최다 발명국제상 수상기록을 보유중인 (기네스북 등재) 발명계 원로 신석균 한국발명학회장에게붙는 수식어들이다. 발명을 자신의 천직이라 여기고 매일 자신의 발명내용을 기록하고 1건 이상을 발명하며, 밥은 굶어도 발명을 하지 않고는 하루도 살 수 없다는 오늘의 '그'를 만나보았다.

분산형 발전시스템의 기술개발 동향 - 마이크로 가스터빈 발전시스템 기술개발 동향

김민국,김한석,안국영,Kim, Min-Guk,Kim, Han-Seok,An, Guk-Yeong 재료연구소 2014 機械와 材料 Vol.26 No.1

마이크로 가스터빈은 수백 kW의 전기를 생산하는 시스템으로, 최근 천연가스 이용의 확산과 분산 발전에 대한 관심이 증가되면서 기술 개발에 대한 요구가 증가하고 있다. 재생열교환기의 도입과 CHP 시스템 적용을 통해 에너지 효율을 개선하고 각 부품의 가격 경쟁력이 확보된다면, 단위 면적당 출력이 높고, 낮은 공해 물질 배출 특성을 갖는 마이크로 가스터빈은 입지 선정이 용이하고 기존의 도시 가스 공급망을 활용할 수 있다는 측면에서 분산형 발전 시스템의 핵심 역할을 담당할 수 있을 것이다. 이에 마이크로 가스터빈의 기술개발 동향을 소개하고자 한다.

기능∙유형 문법에 기반한 한국어 구문 연구 -연재훈(2011), 『한국어 구문 유형론』 깊이 읽기-

김민국 연세대학교 언어정보연구원 2017 언어사실과 관점 Vol.42 No.-

This article aims to overview main arguments and characteristics of Yeon(2011) and to suggest critical viewpoints of Yeon(2011) and new issues on Korean grammatical constructions through our overviews. Yeon(2011) suggests new ideas and solutions of problems about Korean grammatical constructions of passive, causative, Locative alternation, dative subject, promotion of Possessor to object, relative clauses etc. which is difficult to resolve by observing simply Korean language through a study from the functional-typological perspective. In this article, we bring up new issues of 1) the effect of cognitive contiguity(metonymy) on grammatical behavior, 2) diverse functions of passive, 3) semantic properties of dative subject construction, 4) similarity Locative alternation construction with voice, 5) the function of Korean adnominal clauses by critical reviewing of Yeon(2011) and comment on these issues. These issues are expected to prospect Korean syntax and morphology.

Synovial Sarcoma of the Anterior Chest Wall: A Case Report

김민국,이승은,최준혁 대한영상의학회 2020 대한영상의학회지 Vol.81 No.5

Synovial sarcoma is a malignant soft tissue tumor that usually involves the extremities, particularly near the knees; a synovial sarcoma originating in the chest wall is extremely rare. We describe a 26-year-old woman diagnosed with a synovial sarcoma originating in the chest wall, based on CT and MRI findings. Contrast-enhanced CT images revealed a small, well-defined enhancing mass with calcification, in the subpleural area. This lesion was initially diagnosed as a benign tumor; however, the patient developed sudden severe pain with spontaneous bleeding and hemothorax, suggesting the possibility of malignancy. MRI revealed a multilobulated mass with a fluid-fluid level, which characterizes a synovial sarcoma.