항공기의 활주로 이탈 사고는 대형 인명사고로 이어지고 막대한 재산 피해를 유발한다. 항공기 이탈 사고 중 활주로 끝부분에서 발 생하는 사고를 방지하기 위해 국제민간항공기구(ICAO, International Civil Aviation Organization) 및 미국연방항공청(FAA, Federal Aviation Administration)에서는 활주로 끝단에 종단안전구역(RESA, Runway End Safety Area)를 설치하도록 규정하고 있다. 그러나 대규모 공항 건설시 산악, 해상, 호수와 같은 지형적 여건과 인접한 도로, 철도와 같은 인공시설물과의 간섭으로 충분한 종단안전구역 확보에 어려움이 있어, 이를 극복하기 위해 활주로 이탈방지포장시스템(이하 EMAS, Engineered Materials Arresting System)이 개발 되었고 현재까지 해외공항 140여 곳에 적용되었다. 국내는 기준에 맞는 종단안전구역 확보에 어려움이 있는 울릉공항, 흑산공항 및 백령공항 등, 해상에 건설되는 소형공항에 적용이 검토 되고 있다. 본 논문은 해외에 활용된 활주로 EMAS의 제품 특성을 소개하고 국내도입시 고려사항을 검토하여 국내 적용방안을 제안하고자 한다.

The high-level radioactive waste repository must ensure its performance for a long period of time enough to sufficiently reduce the potential risk of the waste, and for this purpose, multibarrier systems consisting of engineered and natural barrier systems are applied. If waste nuclides leak, the dominating mechanisms facilitating their movement toward human habitats include advection, dispersion and diffusion along groundwater flows. Therefore, it is of great importance to accurately assess the hydrogeological and geochemical characteristics of the host rock because it acts as a flow medium. Normally, borehole investigations were used to evaluate the characteristics and the use of multi-packer system is more efficient and economical compared to standpipes, as it divides a single borehole into multiple sections by installing multiple packers. For effective analyses and groundwater sampling, the entire system is designed by preselecting sections where groundwater flow is clearly remarkable. The selection is based on the analyses of various borehole and rock core logging data. Generally, sections with a high frequency of joints and evident water flow are chosen. Analyzing the logging data, which can be considered continuous, gives several local points where the results exhibit significant local changes. These clear deviations can be considered outliers within the data set, and machine learning algorithms have been frequently applied to classify them. The algorithms applied in this study include DBSCAN (density based spatial clustering of application with noise), OCSVM (one class support vector method), KNN (K nearest neighbor), and isolation forest, of which are widely used in many applications. This paper aims to evaluate the applicability of the aforementioned four algorithms to the design of multi-packer system. The data used for this evaluation were obtained from DB-2 borehole logging data, which is a deep borehole locates near KURT.

In this study, the effect of crown heating on the cultivation environment, budding, flowering and yields of strawberry was analyzed. In December, January, and February, when the outside temperature was low, the average strawberry crown temperature at daytime in the test zone was 1.3°C higher than that in the control zone, and the average strawberry crown temperature at nighttime in the test zone was 2.7°C higher than that in the control zone. The average bed temperature at daytime in test zone was 1.7°C higher than that in the control zone, and the average bed temperature at nighttime in test zone was 2.4°C higher than that in the control zone. As a result of performing correlation analysis and regression analysis on strawberry crown temperature and budding period, the correlation coefficient was -0.86, which tended to be shorter as the crown temperature was higher, and the determination coefficient was 0.74. The total yields of strawberry during test period were 392.6 g/plant for test greenhouse and 346.0 g/plant for control greenhouse respectively. As for the quality of strawberries, the ratio of 2L (very large) grades and L (large) grades was 62.4% in the test greenhouse and 58.5% in the control greenhouse, indicating that the proportion of high quality strawberries was higher in the test greenhouse.

자율운항선박 기술은 점차 발전하고 있다. 하지만 완전 자율운항선박이 등장하기 전까지는 원격운영센터에서 원격운영자가 제 어하는 형태를 가지게 될 것이다. 그러나 현재 그들의 면허체계는 국내외적으로 정해지지 않았다. 역량이 검증되지 않은 원격운영자의 등 장은 항행 안전에 위험이 될 것이다. 본 논문에서는 문헌 연구를 통해 원격운영자의 면허체계를 위해 고려해야 할 평가기준과 국내 해기 사 면허체계 내에서 수립할 수 있는 방안을 모색하고 AHP를 활용하여 분석하였다. 그 결과 원격운영자의 면허체계를 위해서는 우선적으 로 법률제정이 필요하고 선박직원법 제4조 해기사 면허의 직종에 원격운영자의 직종을 추가하는 방안이 가장 선호되었다. 이에 따라 원 격운영센터의 조직구성도 기존 선박의 선교인적관리 조직과 유사하게 형성할 수 있을 것이다. 본 연구는 자율운항선박의 인적 관리 측면 에서 원격운영자의 효율적인 양성과 항행 안전에 이바지할 수 있을 것이다.

The preliminary study was conducted on the use of navigation instruments and programs conducted in the previous demonstration and experiment of the training ship SAEBADA, real-time sharing and accuracy of land and sea information, and the development of real-time effective information transmission and reception and management system programs. Based on this, this study used the training ship CHAMBADA, which is similar in length to the tonnage of the fishing boat. The purpose is to present errors in ship situation-specific information data, alarm systems for marine information, and land and ship transmission and reception programs collected using intelligent information management systems to find out whether they can be applied and used in fishing boats. It plans to conduct research on direct and indirect safety and ship’s stability when the intelligent information management system operates in real time in the operation of ships considering the characteristics of small fishing boats and the characteristics of fishing.

The Severe Disaster Punishment Act had recently been established in order to promote safety and health (OSH) management system for severe accident prevention. OSH management system is primarily designed based on risk assessments; however, companies in industries have been experiencing difficulties in hazard identification and selecting proper measures for risk assessments and accident prevention. This study intended to introduce an accident analysis method based on epidemiological model in finding hazard and preventive measures. The accident analysis method employed in this study was proposed by the U.S. Department of Energy. To demonstrate the effectiveness of the accident analysis method, this study applied it to two accident cases occurred in construction and manufacturing industries. The application process and results of this study can be utilized in improving OSH management system and preventing severe accidents.

생물환경조절학회지 31권 3호에 게재된 논문의 재료 및 방법의 양액 정보가 잘못 기재되어 있어 바로 잡습니다.

국제해사기구(IMO)를 필두로하여 국제적으로 선박에 대한 배출가스 규정을 강화하고 있으며, 대한민국 정부도 온실가스 감축 을 위한 기본 로드맵을 설정하는 등 배출가스 저감을 위한 대책 마련이 절실한 상황이다. 또한, 국내 연안을 항해하는 선박에서 배출되는 온실가스 배출량 중 90.6%를 차지하고 있는 어선에 적용가능한 효율적이고 배출가스량이 감소가능한 새로운 추진시스템의 도입이 절실 하다. 본 연구에서는 국내 연안어선에 적용가능한 전기복합 추진시스템을 제안하고, 전기복합 추진시스템이 적용가능한 대상선박을 선정 하였다. 선정된 기존 대상어선에 탑재된 추진시스템과 비교하여 개발된 전기복합 추진시스템을 적용할 경우 발생할 수 있는 예상 연료소 모량을 비교하기 위한 시뮬레이션 시스템을 Matlab/Simulink를 이용하여 구성하였다. 시뮬레이션을 통해 기계식 추진시스템, 전기복합 추 진시스템(배터리 육상충전을 하지 않은 경우, 육상충전을 한 경우)간의 연료소모량 결과를 확인하였으며 전기복합 추진시스템을 적용하 는 경우 약 13%, 16%의 연료소모량이 감소될 수 있는 것을 보여주는 결과를 확인하였다.

This study focused on diagnosing and analyzing the level of sustainable development for each fishing communities by applying the sustainable development index in the fishing communities to support the policy of revitalizing the fishing communities. In terms of methodology, diagnostic indicators for rural areas were used through previous studies and literature surveys, and three categories, five fields and 27 indicators were finally selected through collecting opinions from experts. After deriving the weight for each indicator in detail, the final sustainable development index of the fishing communities was applied to fishing village fraternity. Based on the results of the analysis of the application of sustainable development cases in fishing communities, policy support should be implemented differentially according to regional decline factors and potential growth factors. In the population and social sector, it is necessary to consider ways to reduce population and reduce aging. In the industrial and economic sectors, fishing activation and systematic support for fishing-related industries should be provided. In the marine and built environment sector, the government's active project execution and budget support are required. In addition, it is expected to be used in various ways in the process of developing fishing communities and establishing revitalization plans that reflect the characteristics of the region.

In this study, the following results were obtained by designing a high-efficiency hydrogel and colloid fusion applicator and checking production speed(hydrogel) and working setting time(coating time) by promoting the starting product. As a result of performing a product production test by manufacturing a starting product based on the process automation design, the production volume increased by about three times from 4m per minute to an average of 11m per minute. The working setting time(coating time) of the fusion applicator was shortened from the target of 10minutes to 1.69minutes, which had the effect of reducing the loss of work time.