• 전기학회논문지P
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• 제66권4호
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• pp.151-157
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• 2017

In this paper, it is the result of analysis of the stability by power system analysis about the influence on the power system when the southwest - offshore wind power demonstration complex is constructed to 60MW and it is linked with the onshore power system. Considering the position of the wind turbine actually installed and the length of the cooperating line, we modeled the wind generators, offshore substation and the turbine step-up transformer. Changes of voltage when internal and external faults occurred is analyzed and the reactive power demand according to the amount of electricity generation is derived. And also phase angle stability and frequency is observed through a transient analysis. This paper clarify that there is no problem in the system when only offshore wind power is linked with the grid and try to present the reactive power amount necessary for maintaining the voltage of the point of cooperation appropriately.

• International Journal of Advanced Culture Technology
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• 제10권1호
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• pp.154-159
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• 2022

The purpose This study was conducted to explore the procedures and plans to establish a university-based lifelong education support system for the individuals with disabilities at Chosun University. The research method consisted of expert consultation. Chosun University not only has various units of major(department) that can deepen and integrate knowledge and technology related to lifelong education for the individuals with disabilities, but also has various leadership and various infrastructures that can lead the practice of lifelong education for the individuals with disabilities in Gwangju and Jeonnam areas. The contents of this study were presented five procedures and plans such as the establishment of maintenance and convergence of majors (departments) units, the development and operation of department-led regional-linked education programs through extracurricular education, the introduction of majors in connection with extracurricular education program-linked courses, the selection of core departments, the establishment of cooperative courses between university and graduate schools, and the establishment and operation of lifelong education programs for the individuals with disabilities centered on lifelong education centers. As a result of the study, it was analyzed that the academic foundation of lifelong education for the individuals with disabilities, the guarantee of educational opportunities for the individuals with disabilities, and the lead of linkage between local related organizations can be expected through the establishment of the support system for lifelong education for the individuals with disabilities at Chosun University.

• 한국항만학회지
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• 제5권1호
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• pp.55-69
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• 1991

A Container terminal is a physical link between the ocean and land modes of transport and a major component of the container physical distribution system. A number of projects to increase terminal productivity in the world were found to be tied directly to increasing the efficiency of the intermodal activities, that is, to improving the physical distribution process. This is an indication that the productivity of container terminal is being considered withing a system prospective. The purpose of this study is to establish a model of the container physical distribution system for Pusan port linked with 4 sub-systems including Navigational aids system, Cargo handling/transfer/storage system on dock, Off-dock CY system and In-land transport connection system. and to analyze the system. From this analysis, we found that the system had three bottlenecks on the container physical distribution process in Pusan port : a) cargo handling b) storage and c) inland transport, and showed a way to improve the system.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2000년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2000
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• pp.49-56
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• 2000

Instrumental observation of earth quakes in KIGAM was first attempted in the earty 1980`s by using 6 portable seismographs in the vicinity of Yang-San Faults. Now twenty-four permanent stations, which are equipped with short-period or broad-band seismometer, are included in seismic research network in KIGAM, including KSRS array station in Wonju which is consisted of 26 bore-hole stations. The seismic network of KIGAM is also linked to that of KEPRI(Korea Electric Power Research Institute)which is consisted of eight stations installed within and around the nuclear power plants. Owing to real-time data acquisition by telemetry, it became feasible to automatically locate hypocenters of the local events within fifteen minutes by computer data processing system, named KEMS(Korea Earthquake Monitoring System). Results of the hypocenter determination, together with observational data, are compiled and stored in the data base system. And they are published via web site whose URL is http://quake.kigam.re.kr KIGAM is also running t재 permanent geomagnetic stations installed in Daejun and Kyungju. The observed geomagnetic data are transmitted to Earthquake Research Centre in KIGAM by seismic network and compiled for the purpose of earthquake prediction research and other basic geophysical research.

• 한국안전학회지
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• 제22권5호
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• pp.71-76
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• 2007

Failures of equipments for train control systems are linked directly to extensive damages of human lives or financial losses from the increasing uses of train control equipments utilizing computers. Then safety activities for assuring safety and reliability are needed during the system life-cycle. Risk analysis is important phase to increase safety from determining the risk presented by the identified hazard. In this paper, we investigated several methods for risk estimation of safety activities, and then we drew a comparison between original methods to suggest optimized one in the application to train control systems. In the result of the comparison, we had plan to propose the risk analysis method called Best-Practice(BP) risk method combining advantages of the qualitative and the quantitative analysis. In addition, we attempted to apply the BP-risk method to domestic train control systems handling in Korea.

• 인터넷정보학회논문지
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• 제25권4호
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• pp.109-119
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• 2024

본 연구는 모바일 등 온디바이스(on-device)에 탑재된 생성형 AI 기반 서비스가 증가하는 환경 속에서 온디바이스 AI 관련 초기연구에 기여하고자 한다. 모바일 환경에서 생성형 AI 기반 챗봇 서비스의 성공 전략을 도출하기 위해 구글 플레이 스토어에서 수집한 20만 건 이상의 실제 사용자 경험 리뷰 데이터를 LDA 토픽모델링 기법을 사용하여 분석하였다. 정보시스템 성공 모델(ISSM)에 기반하여 도출된 주제를 해석한 결과 정보 품질에는 튜터링, 대답의 제한, 신뢰할 수 없는 정보와 같은 토픽이, 시스템 품질에는 멀티모달서비스, 대화의 품질, 디바이스 상호운용성의 토픽이, 서비스 품질에는 디바이스 간 호환성, 서비스의 사용 용이성, 유료 서비스의 품질, 계정 호환성의 토픽이, 마지막으로 순 효익에는 창의적 협업 토픽이 연결되었다. 생성형 AI의 의인화는 기존 모델로 설명되지 않는 새로운 경험 요인으로 나타났다. 본 연구는 사용자 측면에서의 구체적인 긍정 및 부정 경험 차원을 이론에 기반하여 설명함으로써 향후 관련 연구의 방향을 제시하고, 성공적인 비즈니스를 위한 개선점과 보완점을 찾아 기업에게 서비스의 성공적 운영을 위한 전략적 인사이트를 제공하고자 한다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 하계학술발표대회 논문집
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• pp.111-111
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• 2007

• 한국CDE학회논문집
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• 제20권3호
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• pp.281-290
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• 2015

The specific goal of the SMS (Ship Management System) is to increate ship safety and decrease maintenance fee. Equipment of ship is managed by PMS (Planned Management System), subsystem of SMS. But hull has not managed by ship manager. So, the Classes have developed the system for hull maintenance. Recently, the ship maintenance system has been developed for satisfying operator's requirements such as managing maintenance data as integrated platform, intuitive manipulation and design for ease of use. To reflect such requirement, 3D Model based maintenance system was introduced for ship in operation stage. Hull items that have to be inspected, repaired, replaced, are stored in integrated data platform with drawing, reports, and etc. and completely linked to 3D product Model. This system is specially developed for measurement and maintenance of hull thickness.

• Journal of Korean Medical Science
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• 제33권53호
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• pp.343.1-343.8
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• 2018

Background: Linkage of public healthcare data is useful in stroke research because patients may visit different sectors of the health system before, during, and after stroke. Therefore, we aimed to establish high-quality big data on stroke in Korea by linking acute stroke registry and national health claim databases. Methods: Acute stroke patients (n = 65,311) with claim data suitable for linkage were included in the Clinical Research Center for Stroke (CRCS) registry during 2006-2014. We linked the CRCS registry with national health claim databases in the Health Insurance Review and Assessment Service (HIRA). Linkage was performed using 6 common variables: birth date, gender, provider identification, receiving year and number, and statement serial number in the benefit claim statement. For matched records, linkage accuracy was evaluated using differences between hospital visiting date in the CRCS registry and the commencement date for health insurance care in HIRA. Results: Of 65,311 CRCS cases, 64,634 were matched to HIRA cases (match rate, 99.0%). The proportion of true matches was 94.4% (n = 61,017) in the matched data. Among true matches (mean age 66.4 years; men 58.4%), the median National Institutes of Health Stroke Scale score was 3 (interquartile range 1-7). When comparing baseline characteristics between true matches and false matches, no substantial difference was observed for any variable. Conclusion: We could establish big data on stroke by linking CRCS registry and HIRA records, using claims data without personal identifiers. We plan to conduct national stroke research and improve stroke care using the linked big database.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 C
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• pp.1897-1899
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• 2004

In this paper, in order to analyze the characteristics of degradation by salt water with insulation cover and OC wire(outdoor cross-linked polyethylene insulated wire) used in power receiving system, an experimental apparatus has been designed and fabricated. An insulation cover and OC wire were installed in an experimental apparatus, and degraded in each case of 2%, 5%, 10% salinity during 12 weeks. An optical microscope was used to observe a changing process of sample surface, and an electrical safety was analyzed by measuring dielectric breakdown voltages of samples. As salinity increased, so ununiformity of sample surface increased. The breakdown wasn't produced to 50kV about samples regardless of salinity, testing period.