• 제목/요약/키워드: DO-254

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항공 시스템용 전자 하드웨어 개발을 위한 미국 및 유럽의 가이드라인 : RTCA DO-254와 ECSS-Q-ST-60-02C의 비교 분석 연구 (A study of U.S. and European electronic hardware guidelines for aviation system : RTCA DO-254 and ECSS-Q-ST-60-02C)

  • 김성훈;김현우;채희문;김기두
    • 항공우주시스템공학회지
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    • 제16권4호
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    • pp.10-16
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    • 2022

  • 항공 시스템은 소프트웨어·하드웨어 복합 형태로 개발되므로, 관련 가이드라인의 적용 필요성이 증가하고 있다. 그러나 현재 국내의 항공 시스템에 전자 하드웨어와 관련한 국제 개발 가이드라인을 체계적으로 적용한 경우는 흔치 않다. 따라서, 본 연구에서는 초정밀 GPS 보정시스템(SBAS; Satellite Based Augmentation System) 개발·구축의 KASS(Korea Augmentation Satellite System) 성능적합증명 수행을 사례로 항공(우주)용 전자 하드웨어 개발 가이드라인인 DO-254와 ECSS-Q-ST-60-02C의 비교 분석 연구를 목적으로 한다.

  • https://doi.org/10.20910/JASE.2022.16.4.10 인용 PDF KSCI

제주도 노인에서 고관절 골절 발생률과 사망률 (The Incidence and Mortality for Hip Fracture in the Elderly in Jeju-do)

  • 김호봉
    • 대한정형도수물리치료학회지
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    • 제15권2호
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    • pp.44-49
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    • 2009

  • Purpose : The purpose of this study was to evaluate the incidence and mortality for hip fracture in the elderly in Jeju-do. Methods : We enrolled 254 cases among 318 patients older than 50 years of age with a hip fracture during two years period(2003-2004). We investigated the incidence and mortality during follow up 3~4 years period until December 31, 2007. Results : The crude incidences of hip fracture the age group ${\geq}50$ years were 141(11.2/10,000) in 2003, 177(13.6/10,000) in 2004, and 249(17.0/10,000), 69(6.3/10,000) for women and men, respectively. The mean age of them was 78.3 years, male was 69(21.7%), female was 249(78.3%) among 318 patients. Survivor was in the 146(57.5%), death was in the 108(42.5%) among 254 cases period for follow up. In the death group, activity was significantly lower at the time of post-fracture 3(p=0.013), 6(p=0.000), and 12 months(p=0.000). The mortality of hip fracture and crude death rate(CDR) were 108(42.5%, n=254), 11,884(1.7%, n=675,889) in 2003~2007 in Jeju. Conclusion : Developing and applying a variety of activity programs that increase activity in post-fracture may improve activities of daily living, reduce burden of family and society, be useful in improving the quality of life and ultimately lower the mortality.

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