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기능연속성계획(COOP)도입에 따른 재난관리책임기관 지정 확대 및 재난관리주관기관과의 연계성 강화 방안 연구
신재성,정종수 한국재난정보학회 2021 한국재난정보학회 학술대회 Vol.2021 No.11
재난 및 안전관리기본법에서는 재난을 유형별로 분류하고 재난관리주관기관과 재난관리책임기관을 지정하여 운영하도록 정의되어있다. 재난관리책임기관의 경우 재난관리에 관한 핵심적 역할을 수행하고 있으며, 기능연속성계획(COOP) 수립・시 행기관 이지만, 재난 유형에 따라 지정기관이 특정 재난유형에 편중되어 있거나, 지정기관이 없는 경우도 존재하여 재난관리주 관기관과의 연계성을 확보하기 어렵고 필수기관의 누락으로 인한 재난관리의 사각지대 발생이 우려된다. 재난관리책임기관 추가 지정 및 기존 지정기관에 대한 재정비가 필요하며 특히 국민생활과 밀접도가 높은 시설 및 시스템을 보유하고 있는 경우 민간기관 이라 할지라도 적극적으로 재난관리책임기관 지정에 노력하여 재난관리의 전문성을 높이고 효율성을 확보해야 할 것이다.
전립선암의 간헐적 남성호르몬 차단요법에서 조기 호르몬 불응성 이행의 예측인자
신재성,최형준,최양수,채수응,최한용 대한비뇨의학회 2004 Investigative and Clinical Urology Vol.45 No.9
Purpose: The purpose of this study was to define the predictive factors for the early progression of androgen independent prostate cancer in patients receiving intermittent androgen deprivation(IAD) therapy. Materials and Methods: A total of 101 patients(stages A to C in 29 and stage D in 72), who had completed at least 1 cycle of IAD, were included. A variety of possible prognostic factors, such as age, initial prostate-specific antigen(PSA) and testosterone, Gleason score, lymph node or bone metastasis, nadir PSA and testosterone, duration to nadir PSA, duration of off treatment, and ECOG performance index were analyzed using uni- and multivariate tests. Results: Patients had completed at least one, and up to six, treatment cycles with a median follow-up of 43(13-100) months. The median nadir PSA levels were 0.28, 0.41, 0.71, 0.88, 1.85 and 0.79ng/ml for cycles 1 to 6 (median 4.6 months), respectively. The median one cycle duration(on+off treatment) was 14 months, 44% of that time spent off treatment, but the off treatment duration decreased with increasing number of treatment cycles. A total of 42 patients progressed to androgen independent prostate cancer, and the progression free rates at 36 and 60 months were 72 and 52%, respectively, according to the Kaplan-Meier method. Using multivariate analysis, the nadir PSA(p=0.044), ECOG performance index(p= 0.039) and lymph node or bone metastasis(p=0.03) were the strongest predictors for the progression of androgen independent prostate cancer. Conclusions: On receiving IAD, prostate cancer patients with lymph node or bone metastasis, a poor performance status and comparatively higher serum PSA nadir value after the first treatment phase, there is a high possibility for the early progression of androgen independent prostate cancer. (Korean J Urol 2004;45:858-864)
신재성,김현준,김성원,이기주,박재성,오범석 한국항공우주학회 2023 韓國航空宇宙學會誌 Vol.51 No.1
X-37b is a fairly new but very successful uncrewed technology demonstrator that can reenter Earth’s atmosphere, partially replacing the reentry mission of the Space Shuttle program that retired after serving decades in the United States of America. For this, an improved, thermal protection system(TPS) was built with the heritage of previous reentry spacecraft, in particular based on silica ceramic tiles. In view of the TPS design, it is noteworthy that the leading edge of X-37b wings is made in new material called TUFROC instead of the flight-proven RCC(Reinforced Carbon-Carbon) of the Space Shuttle era. In this study, the technologies of Space Shuttle TPS and TUFROC are analyzed. 수십 년 운용 끝에 우주왕복선이 퇴역한 후 미국에서는 X-37b라는 무인 우주비행체를 개발하였다. X-37b는 우주왕복선과 같은 재진입 비행체이므로 열방호시스템이 필수적인데, 날개앞전(Leading Edge) 부위의 열방호시스템은 우주왕복선에서 검증된 RCC(Reinforced Carbon-Carbon)를 사용하지 않고 새로운 열방호시스템(TUFROC)을 개발하여 사용한 것이 특징이다. 이에 대하여 본 문헌에서는 기존 열방호시스템 및 TUFROC의 기술과 TUFROC의 개발내용에 대하여 소개하고자 한다.
40-W 200-ns 300-kHz Thulium-doped Fiber Laser at 2050 nm
신재성,차용호,천병재,박현민 한국광학회 2021 Current Optics and Photonics Vol.5 No.5
A 40-W 200-ns 300-kHz thulium-doped fiber laser at 2050 nm with a master oscillator power amplifier configuration was developed, for application to lithium-isotope separation. The master oscillator generated a 5.35 W continuous-wave beam, which the pulse generator then broke into 200-ns pulses at 300 kHz. Then, the laser beam was amplified by passing through a two-stage amplifier. The output power finally obtained was 42.0 W at 2050 nm, and was stable for a long time, over 2 hours. In spite of this achievement, mode instability was observed in the output beam. This can be solved in the future by using a method such as tight coiling.