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서성철,김태균,송방원,Seo, Seong-Cheol,Kim, Tae-Gyun,Song, Bang-Won 한국국방경영분석학회 2005 한국국방경영분석학회지 Vol.31 No.2
Even though K-series combat equipment's engine depot maintenance cycle of ROK army is 10years In average, that of the K-9 Self Propelled(SP) howitzer which has been fielded since 99 $3{\sim}4$years causing limitations to effective equipment operations and combat-readiness. Therefore, the current K-9 self-propelled howitzer engine operation period of 1,500 hours, which is greatly shorter than other equipments, had to be verified. In order to find the optimum depot maintenance cycle, related field operation conditions were verified and opinions were collected, and also the background on current depot maintenance cycle setting was studied.
서성철,김도형,Christopher Paul,유영,정지태 대한천식알레르기학회 2014 Allergy, Asthma & Immunology Research Vol.6 No.5
Purpose: Indoor risk factors for allergic diseases in low-income households in Korea have been characterized only partially. We evaluated the prevalencesof atopic dermatitis, asthma, and allergic rhinitis in Seoul, Korea, to identify key housing and behavioral risk factors of low-income households. Methods: Statistical analysis of the prevalence of these diseases and various risk factors was conducted using data from a 2010 Ministry ofEnvironment household survey. Logistic regression models were generated using data from 511 low-income household apartments in districts ofSeoul. Results: In general, housing factors such as renovation history (P<0.1) and crowding status (P<0.01) were associated with allergic rhinitis,whereas behavioral factors such as frequency of indoor ventilation (P<0.05) and cleaning (P<0.1) were inversely correlated with atopic dermatitis.Indoor smoking was a major trigger of asthma and atopic dermatitis in low-income households (P<0.05). The presence of mold and water leakagein houses were the most important risk factors for all three diseases (P<0.05). Conclusions: Various risk factors play a role in triggering allergicdiseases among low-income households in Seoul, and health or environmental programs mitigating allergic diseases should be tailored to addressappropriate housing or behavioral factors in target populations.
기후변화 시나리오 이용한 확률강우량의 점진적 변화 예측 연구 - 금강유역을 대상으로 -
서성철,박형근,김다예,이승욱,맹승진,오다현 위기관리 이론과 실천 2022 Crisisonomy Vol.18 No.8
Climate change caused by global warming has increased the number of severe damages by torrential rains in South Korea. With this concern, the rainfall design, which takes climate changes into account, is necessary for designing safe and sustainable hydraulic structures to prevent such damages. This study conducted statistical testing of all rainfall data located at six rainfall stations in Geum river basin. Kolmogorov–Smirnov and Root Mean Square Error were used to apply five probability distributions (PT3, GPA, GNO, GEV, GLO) to the statistical testing results. The analysis of climate change scenarios, RCP 4.5 and RCP 8.5, showed that the probability of rainfall increased as the period gradually increased to 2040, 2060, 2080, and 2100. The study of probability rainfall considering climate change scenarios can be utilized as a rough guideline for flood and drought prevention. It can also make an ultimate contribution to plans for designing safe and sustainable hydraulic structures and water resources. 지구온난화로 인한 기후변화는 우리나라 집중호우의 발생 건수와 피해 규모를 증가시켰으며, 집중호우로 인한 피해는 단일 자연재해 중 가장 크다. 이러한 집중호우 피해를 예방하기 위해서는 기후변화를 고려한 댐 및 수력 구조물의 적합한 설계강우량이 필요하다. 본 연구는 금강 6개 강우관측지점의 연최대일강우량 자료의 통계적 검정 후 5개의 확률분포(PT3, GPA, GNO, GEV, GLO) 적용을위해 L-모멘트법, Kolmogorov–Smirnov과 RMSE를 이용하여 적절성을 판단하였다. 적합도 검정은5개(PT3, GPA, GNO, GEV, GLO)의 확률분포가 본 연구에 적합한 것으로 나타났으며, 금강유역의기후변화 시나리오에 대한 확률분포의 적용으로 확률강우량을 산정하였다. 기후변화 시나리오 RCP 4.5, RCP 8.5 적용과 분석기간 2040년, 2060년, 2080년, 2100년까지로 기간이 점진적으로 증가함에따라 확률강우량이 증가하는 것으로 나타났다. 기후변화 시나리오를 고려한 확률강우량 연구는 홍수와 가뭄을 예방하기 위한 대략적인 지침으로 활용 가능하며 댐 및 수리시설물과 수자원 계획 설계에 적용 가능하다.