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안상태,강국정,홍석균,Ahn, Sang-Tae,Kang, Kuk-Jung,Hong, Suk-Kyun 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.3
The necessity for harmonically growing of economy and environment has been on the rise late in the twentieth century. Green transformation is defined as efficiency enhancement of conventional guns and ammunitions. We also define green innovation as evolution of fire power systems breaking with conventional methodology. This kind of green innovation could even change a paradigm of warfare in the future. In this paper, we classify the green technology in the field of fire power into five technological groups, and the research and development trend of green technology in the field of fire power is analyzed.
안상태 대한의사협회 2011 대한의사협회지 Vol.54 No.1
Since the early detection rate of breast cancer is increasing and skin- or nipple-sparing mas-tectomies have become popularized recently, the need for breast reconstruction using implants is continuously increasing. Simplicity of surgical techniques, short operation time, short hospital stay, short recovery time, no need for donor site defects and scars, and reconstruction with tissue of same color, texture, and sensation are the main advantages of implant reconstruc-tion. However, reconstructed breasts using implants tend to be less natural and ptotic, sensitive to external temperature, unable to adapt to the normal aging process of the breast, and may have implant related complications. In patients with postoperative radiation, implant reconstruc-tion is not indicated because of decreased skin flap circulation and increased implant related complications. Although autologous tissue reconstruction is known to produce natural and aes-thetic breasts, similar results can be achieved by implant reconstruction when it is well indicated and performed with appropriate techniques by experienced surgeons. Implant reconstruction is best suited for young, active women with small round breasts and slender bodies.
안상태,윤양진 釜山大學校 附設 體育科學硏究所 2007 體育科學硏究所 論文集 Vol.23 No.2
본 연구의 목적은 체육고등학교 학생의 사회인구학적 특성에 따른 교육만족도를 분석하는데 있다. 연구의 목적을 달성하기 위하여 체육고등학교 10개교 946명의 학생을 연구대상으로 표집하였다. 자료의 처리는 SPSS 12.0 Ver 프로그램을 이용하여 빈도분석, 요인분석, t-검증, 일원변량분석을 실시하여 다음과 같은 결론을 얻었다. 첫째, 성별에 따른 교육만족도는 교육과정, 학습지도요인에서 유의한 차이를 보였으며, 1학년이 2학년과 3학년보다 높게 나타났다. 셋째, 선수경력에 따른 교육만족도는 하위요인 모두 유의한 차이를 보이지 않았다. 넷째, 종목에 따른 교육만족도는 교육환경요인에서 유의한 차이를 보였다. 즉, 역도, 레슬링과 육상, 유도와 수영순으로 높게 나타났다
피스톤 슬랩에 의해 발생되는 엔진 블록의 표면 진동 속도 예측 모델
안상태,조성호,김양한,이동수 한국소음진동공학회 1999 소음 진동 Vol.9 No.3
Piston slap is one of the sources producing engine block surface vibration and mechanical noise. To analyze piston slap-induced vibration, a realistic but simple model is proposed and verified experimentally. A piston is modeled by 3 degree of freedom system and an impact point between piston skirt and cylinder wall by 2 degree of freedom system. Numerical simulation estimates impact forces of piston in cylinder, and the engine block surface vibration response is predicted by the convoluton of the impact forces with measured impulse responses. Experimental verification on the predicted response has been also performed by using a commercial 4-cylinder diesel engine. the predicted and experimental vibration responses confirm that the suggested model is practically useful.