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김진,하수철,Kim, Jin,Ha, Su-Cheol 대전대학교 군사연구원 2006 군사학연구 Vol.4 No.-
In this paper, we introduce the operational management architecture on the military satellite communication of United States and analyze the current problems of Korea military. We discuss on the development scheme and the idea of construction to manage and to operate the next military satellite communication stabilitly.
3.0시대 건강수명 120세를 위하여 3 - 연말연시 회식 소중한 간 건강을 위한 Do & Don't
김하수,Kim, Ha-Su 한국건강관리협회 2014 건강소식 Vol.38 No.12
다가오는 연말연시가 두려운 우리 몸의 기관은 단연 간이다. 회식과 과음이 지주 이어질수록 가장 먼저 혹사를 당하기 때문, 송년회와 신년회에서 음주를 피할 수는 없지만, 요령을 알면 조금 더 건강하게 즐길 수 있다.
김형식(Hyung Sik Kim),곽승준(Seung Jun Kwack),천선아(Sun Ah Chun),한하수(Ha Su Han),박현선(Hyun Sun Park),안미영(Mi Young Ahn),배기환(Ki Hwan Bae),이병무(Byung Mu Lee) 한국응용약물학회 1998 Biomolecules & Therapeutics(구 응용약물학회지) Vol.6 No.3
The subacute oral toxicity study of DWP-311 was carried out in Sprague-Dawley rats of both sexes. We daily examined clinical signs, body weights, hematological and biochemical parameters, and histopathological examinations for 30 days after administration of DWP-311 with different dose levels (0, 0.04, 0.2, and 1.0 g/kg). There were no clinical signs and pathological changes compared with control group except slight decreases in spontaneous motor activities and locomotions at high dose group of DWP-311. Body weights were not significantly changed in animals treated with DWP-311. In histopathological examinations, there were 2 cases of pneumonia in control group for one male and one female, but it was not directly related to DWP-311. These results indicate that subacute oral toxicities of DWP-311 were low and the no-observed adverse effect level (NOAEL) was considered to be 1.0 g/kg in rats.
단량체 조성 변화에 의한 수성 아크릴계 공중합체 제조 및 점착특성
김하수 ( Ha Su Kim ),임권택 ( Kwon Taek Lim ) 한국화상학회 2021 한국화상학회지 Vol.27 No.1
박리강도와 내수성이 향상된 친환경적인 수성 점착제 제조를 위해 Tg가 상온에 가깝도록 아크릴 모노머인 methyl methacrylate(MMA), butyl acrylate(BA), methacrylic acid(MAA)의 비율을 조절하고 ammonium persulfate를 개시제로 이용하여 아크릴 공중합체(Acrylic copolymer)를 유화 중합하여 아크릴 에멀젼 점착제를 제조하고 평가하였다. MMA:BA:MAA를 55.2:43.5:1.3의 mole 비율로 합성한 결과, GPC와 입도분석으로 아크릴 공중합체 에멀젼이 합성된 것을 확인하였으며 휘발성 유기물(VOCs)도 검출되지 않았다. 이론적 Tg는 18.1℃이며, 피착재로써 폴리우레탄 폼, 폴리프로필렌 폼, 폴리프로필렌을 적용하여 초기, 최종, 침수 후 접착력을 평가한 결과 박리강도가 기존 제품에 비해 향상되었음을 확인하였다. In order to manufacture an eco-friendly aqueous adhesive with improved peel strength and water resistance, we adjusted the ratio of acrylic monomers methyl methacrylate (MMA), butyl acrylate (BA), and methacrylic acid (MAA) so that Tg is close to room temperature, and used ammonium persulfate as an initiator. Then, an acrylic copolymer was emulsion-polymerized to prepare and evaluate an acrylic emulsion adhesive. As a result of synthesizing MMA:BA:MAA in a mole ratio of 55.2:43.5:1.3, it was confirmed that an acrylic copolymer emulsion was synthesized by GPC and particle size analysis, and volatile organic substances(VOCs) were not detected. Theoretical Tg is 18.1°C, close to room temperature, and as a result of evaluating the initial, final, and post-immersion adhesion by applying polyurethane foam, polyethylene foam, and polypropylene as adherends, it was confirmed that the peel strength was improved compared to existing products.