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유영제,최성 호서대학교 반도체제조장비국산화연구센터 2000 학술대회 자료집 Vol.2000 No.1
본 논문은 3차원 컴퓨터 그래픽스(이하 3D 그래픽스)는 컴퓨터의 게임과 시각화(Visualization)등의 경교하고 복잡한 시스템 개발에서부터 단순한 그래프 출력 프로그램까지 그 응용범위가 넓다. 그래픽스 전용 웍스테이션에서부터 개인용 컴퓨터에 이르기까지 다양한 환경으로 그 응용이 점차 확산되는 추세에 있다 이에 발맞추어 기존의 그래픽스 라이브러리는 새로운 요구를 수용하기위해 확장 및 개선되고 있으며 개인용 컴퓨터 및 웹 기반의 3D 그래픽스 응용을 위해 새로운 그래픽스 라이브러리가 개발 및 배포되고 있다. 개발목적에는 다소 차이가 있으나, VRML, Direct3D, java3D등은 이러한 추세를 앞당기는 견인차 역할을 하고 있음에는 틀림이없다. OpenGL이 무엇으면 사용하는 용도 및 추가하는 테크닉과 기술을 설명을 하였다.
이기환,오제직,최석남,박병빈,이태호,김영유 공주대학교 사범대학 과학교육연구소 1998 과학교육연구 Vol.29 No.1
p-type α-SiC(4H, 6H, 15R polytype)를 사용하여 다공질 실리콘(porous silicon; PS)의 제작방법과 유사하게 HF/H₂O/C₂H??OH 용액에서 전기화학적으로 에칭을 하여 광발광 특성을 가지는 다공질 실리콘 카바이드(porous silicon carbide; PSC)를 제작하였다. PSC의 다공질의 분포는 전류밀도가 증가할수록 증가하고 다공질의 크기는 감소하였으며 광발광(photoluminescence; PL) 스펙트럼의 분석을 통해 전극 표면에서의 산화반응은 공급되는 전자의 양과 전류밀도에 의존하며 전류밀도가 증가할수록 전극의 산화반응은 억제된다는 결과를 얻었다. Porous silicon carbide(PSC) having photoluminescence(PL) can be prepared by a technique very similar to that used in porous silicon preparation, by electrochemical etching of crystalline p-type α-SiC(4H, 6H, 15R polytype) in ?? solution. The results show that porous distribution increase with increasing of the current densities while pore size decrease with that. Through the PL spectra analysis anodic oxidation of electrode surface was dependent on the amount of provided electrons and the current densities and inhibited with increasing of the current densities.
Bang, Je-Yong,Hu, Un-Bok,Kim, Hyea-Ju,You, Young-Han 한국환경생태학회 2015 한국환경생태학회지 Vol.29 No.1
In order to get basic data for flood plain restoration, we surveyed the woody vegetation in Korean natural rivers and analyzed the species' characteristics with regards to patterns of richness and diversity. These characteristics were higher in hard wood forests than those in soft wood forests, such as Salix spp. community. Futhermore, they were the highest in the Prunus sargentii-Pinus densiflora community(H' 1.095), and the lowest in the Carpinus laxiflora community(H' 0.118) among the hard wood forests. Species' richness diversity were the highest in the Salix gracilistyla community, but the lowest in the S. koriyangi community or S. koreensis community among the soft wood forests. With regards to the dominant index, just one community is over 0.9, 13 communities are between 0.3-0.7 and 15 communities are less than 0.3. The Salix koreensis community was the highest at 0.931, and Prunus sargentii-Pinus densiflora community was the lowest at 0.13. Species' richness and diversity was significantly correlated with tree layer coverages and degree of slope. These results mean that in order to increase plant species diversity in flood plains planted hard woody trees, such as oaks and fir, are needed to suit environmental conditions with steeper slope and lower canopy coverage.
유제성,박종우,최영환,조영순,조광현,박준석,정성필,이한식,You Je-Sung,Park Jong-Woo,Choi Young-Hwan,Cho Young-Soon,Cho Kwang-Hyun,Park Jun-Seok,Chung Sung-Pil,Lee Hahn-Shick 대한임상독성학회 2006 대한임상독성학회지 Vol.4 No.1
Symptoms of aspirin overdose may vary from acid-base disturbance, electrolyte abnormality, non-cardiogenic pulmonary edema, chemical hepatitis, seizure to cardiac toxicity. Cardiac adverse effects from aspirin are uncommon but there are reports of arrhythmia, cardiopulmonary arrest, and myocardial infarction. We report 2 cases of young women with aspirin overdose who exhibited ischemic changes on their ECGs a few hours after the ingestion with spontaneous recovery in a few days. First case, a 29 year old woman, presented to the emergency department 6 hours after ingesting 250 tablets of aspirin (325 mg/T). On examination, the temperature was $36.3^{\circ}C$: blood pressure, 105/72mmHg; Pulse, 111/min and respiratory rate, 24/min. Second case, a 27 year old woman, an hour after ingesting 60 tablets (325mg/T). On examination, the temperature was $36.0^{\circ}C$: blood pressure, 102/72 mmHg; pulse, 89/min and respiratory rate, 25/min. In both cases, ECG after 6 hours of ingestion had sinus tachycardia and developed T wave inversion on the anterior leads in the following ECGs. Their initial serum salicylate levels after 6 hours of ingestion were 71.2 mg/dL and 28.4 mg/dL respectively. These salicylate levels were resolving when these ECGs were observed. The ECG changes resolved in the following days and they were discharged without any further symptoms. Further studies are needed, but for the time being, when dealing with salicylate overdose, transient cardiac depression should be kept in mind to avoid adverse ischemic cardiac events.
콘크리트구조물에 발생한 비구조균열의 원인분석을 위한 진단기법의 개발과 활용사례
신홍철 ( Shin Hong-chol ),우영제 ( Woo Young-je ),박유신 ( Park You-shin ),한장현 ( Han Jang-hyun ),한영철 ( Han Young-chul ),권영진 ( Kwon Young-jin ),김무한 ( Kim Moo-han ) 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.2 No.1
There is a crack appearing on the concrete structure from one made and that exert a bad influence on concrete structure. These cracks are variable, causes more than 3 are acting compositively as you see, crack occupy a important position, from the flank of maintance refair, of concrete structure, recently though a sefety diagnosis on the crack of concrete structure is acting briskly, for that reason, most cases are only pat emphasis on the process of a sefety diagnosis of structural crack. In this study, therefore, we propose an analysis method of none-structural crack appearing on the concrete structure from the flank of mix proportion and material, and it is an aim to examine the point at issue of the test.