• 전기학회논문지
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• 제63권4호
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• pp.583-588
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• 2014

In this study, there are examined to the grounding of lightning protection system and electrical continuity tests in the field. The standard for lightning protection system is different design or construction according to the characteristics of the structure. Ground is measured and compared at least four locations. According to the measured results in the field, the sampled values of the ground resistance are measured $5{\Omega}$ or less and the difference between each value is suitable as $0.2{\Omega}$ or less. The values of the electrical continuity test between ground and metal bodies are measured 3 groups such as isolated portion, the mechanical contacted portion, and the electrical continuity portion measuring $0.2{\Omega}$ or less. It is measured to be less than $0.2{\Omega}$ at all in metal bodies of underground. A metal body installed inside the structure is not isolated, but the resistance values are higher than $0.2{\Omega}$. Therefore, It must be carried out the structure having lightning protection system confirm the LPL(lightning protection level) and design the strategy.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.125-127
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• 2005

This paper conducted to evaluate electrical continuity of steelworks within reinforced concrete apartment structures as the down conductor in external lightning protection system. The reinforcing bars in reinforced concrete structures can be used as the down conductor when their overall electrical resistance is not greater than the resistance value of 0.2 ohm between the uppermost part and the ground level. According to the results of electrical resistances measured by 4-terminal low resistance measurements, the steelworks in reinforced concretes structures exhibited the electrical continuity with low electrical resistance.

• 대한건축학회논문집:계획계
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• 제35권12호
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• pp.83-92
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• 2019

The purpose of this study is to analyze the continuous forms of time and space that work as architectural design principles of the Memorial to the Murdered Jews of Europe (Jewish Memorial). Continuity is divided into two, physical and non-physical attributes. The former extends from small installations to furnitures, finishes, spatial composition, and even spatial networks that complete architecture, and the latter is tied to time, from traditional to historical, developmental, commemorative or memorial elements. They are inherent in architecture as continuous forms. The Jewish Memorial is analyzed by the analysing framework of these two items. The analysis of the two layers can be summarized as follows; physical continuity is found in the space networks of the Memorial's inside and outside, the undulating spaces, the finishes, the small furnitures and installations, the entrances of staircases, the expanded underground of the ground order, and non-physical continuity manifests in the topological variation of spatiality, the morphological development of memorial architecture, the connection of semantic sense of space, and the superposition of historicity and modernity. These forms of continuity do not aestheticize the German enormity history, but make the meaning of the Memorial into non-superficial, in-depth architecture as a monument. Thus, the results of this study show that physical and non-physical continuity should be considered as the important design principles of architecture that makes the Memorial architecture possible.

• 대한간호학회지
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• 제50권4호
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• pp.513-522
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• 2020

Purpose: This study aimed to utilize concept analysis to obtain a better understanding of the concept of "continuity of care" in chronic diseases. Methods: The concept of continuity of care was analyzed using the Walker and Avant method. Covering literature in English from 1930 to 2018, the data sources included CINAHL Complete, Academic Search Complete, MEDLINE, PsyARTICLES, Health Source: Nursing/Academic Edition, Google Scholar, Science Direct, and the Cochrane Library. Results: A comprehensive definition of concept of continuity of care was developed based on a systematic search and synthesis. The key defining attributes were identified as (a) care over time, (b) the relationship between an individual patient and a care team, (c) information transfer, (d) coordination, and (e) meeting changing needs. The antecedents of continuity of care were having a chronic disease, inexperienced with disease management, a poorly coordinated healthcare system, and medical care limitations. The consequences of continuity of care were decreasing hospital admissions, reducing costs, reducing emergency room visits, improving the quality of life, improving patient satisfaction, and delivering good healthcare. Conclusion: The thorough concept analysis provides insight into the nature of "continuity of care" in chronic diseases and also helps ground the concept in healthcare.

• 화약ㆍ발파
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• 제29권2호
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• pp.59-66
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• 2011

자연적, 기술적, 생물학적 재해에 의해 유발된 다양한 리스크가 조직의 업무연속성에 위협을 미친다. 업무연속성은 모든 조직에 가장 중요한 과제로써 그것을 적절히 관리하는 것은 조직의 성패를 가르게 된다. 업무연속성계획(BCP)은 업무연속성을 담보할 수 있는 관리 절차로 정의될 수 있다. BCP는 리스크관리, 상시운영계획, 재난대응/복구, 훈련/학습, 위기 전달 등을 포함한다. 이중에서 리스크관리는 리스크확인, 분석, 평가 처리를 하기 위한 체계적 방법으로 리스크평가는 리스크확인, 분석, 평가로 구성된다. 리스크평가는 BCP를 계획하기 위한 첫 번째 단계이다. 본 연구에서는 하수관거 매설 공사에 대해서 리스크평가를 수행하였다. 리스크평가 과정을 통해 건설 공사에 위협을 주는 18개의 리스크를 확인하였고 이들에 대한 리스크 수준 분석을 통해 대책이 필요한 가장 상위 수준의 리스크로는 '굴착면의 붕괴', '지중매설물 파손', '소음 및 먼지날림', '원자재값 상승'으로 나타났다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2001년도 가을 학술발표회 논문집
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• pp.133-145
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• 2001

This paper presents quality and measure controls of Plastic Board Drains(PBD) for improvement of soft ground. Laboratory and field tests has been carried out to evaluate the quality of PBD focussing on : discharge capacity of flow area; permeability of filter sleeve; migration of fine particles; deformed shape of PBD; consolidation of clay in the close vicinity of PBD; tensile strength of PBD; long-term consolidation behavior of clay-PBD. Test results show that the quality of PBD is sufficient to perform the improvement of soft silty and clayey ground. But, geotechnical engineer must make efforts minimizings of PBD damage and ground disturbance, continuity of drainage system during construction. Adequate monitoring system should apply at ground focussing on number, location, and accuracy of geotechnical instrumentation, measurement and evaluation of data for ground behaviour.

• Earthquakes and Structures
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• 제22권1호
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• pp.53-64
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• 2022

This study proposes an intelligent semi-active isolation system combining a variable-stiffness control device and ground motion characteristic prediction. To determine the optimal control parameter in real-time, a genetic algorithm (GA)-fuzzy control law was developed in this study. Data on various types of ground motions were collected, and the ground motion characteristics were quantified to derive a near-fault (NF) characteristic ratio by employing an on-site earthquake early warning system. On the basis of the peak ground acceleration (PGA) and the derived NF ratio, a fuzzy inference system (FIS) was developed. The control parameters were optimized using a GA. To support continuity under near-fault and far-field ground motions, the optimal control parameter was linked with the predicted PGA and NF ratio through the FIS. The GA-fuzzy law was then compared with other control laws to verify its effectiveness. The results revealed that the GA-fuzzy control law could reliably predict different ground motion characteristics for real-time control because of the high sensitivity of its control parameter to the ground motion characteristics. Even under near-fault and far-field ground motions, the GA-fuzzy control law outperformed the FPEEA control law in terms of controlling the isolation layer displacement and the superstructure acceleration.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.470-471
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• 2008

SVL is installed at underground transmission system to protect cables and insulation joint-box from overvoltages caused by lightning, switching, and line-to-ground fault. Domestic underground power system adopts cross bonding type to reduce the induced voltage at sheath, but single-point bonding is required depending the system installation configuration. SVL can be easily broken by overvoltages induced at joint-box because single-point bonding has uneffective system structure to extract fault current. ANSI/IEEE recommends Parallel Ground Continuity Conductor(PGCC) to prevent SVL breakdown. In this paper, EMTP simulation is performed to analyze effects on SVL under PGCC installation when single-line-to-ground fault occurs. The result shows that PGCC and short single-point bonding distance can reduce overvoltages at SVL.

• 한국재난정보학회 논문집
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• 제19권1호
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• pp.195-203
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• 2023

연구목적: 본 연구에서는 철도관계기관의 종사자들을 대상으로 사업연속성 인식의 하위 요인에 대한 측정/분석을 통해 사업연속성 인식 도구의 타당성을 확인하고자 한다. 연구방법: 선행연구를 바탕으로 한 사업연속성 인식 측정도구에 대해 하위 요인을 7개로 구분한 총 29개 문항을 이용하여 철도관계기 관의 임직원 대상 온라인 설문 및 방문 설문을 실시하였다. 연구결과: 탐색적 요인분석의 결과를 보았을때, 사업연속성 인식 척도는 이론적 근거를 통해 가정한 요인 수는 7요인으로 추출되었고 전체 설명량은 82.616%였다. 요인별로 문항 확인 시 모든 문항이 기존에 측정하고자 한 요인으로 부하됨을 확인할 수 있었다. 결론: 본 연구를 통해 조직의 이해, 리더십, 기획, 운영, 지원, 실적평가, 개선을 하위 요인으로 하는 철도기관의 사업연속성 인식에 대한 측정도구가 탐색적 요인분석을 통해 타당도가 있음을 확인하였다. 향후 과제로는 재난 관련 기관에서 사업연속성계획의 실질적인 작동성 유지 및 고도화를 위해 본 도구를 변수로 사용한 사업연속성 내재화, 조직효과성, 학습지원환경 등과의 구조적인 관계 연구가 필요하다.

• Journal of Positioning, Navigation, and Timing
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• 제12권4호
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• pp.369-377
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• 2023

This paper presents the analysis results of navigation performance of Korea Augmentation Satellite System (KASS) test signals. Performance analysis was performed with Global Positioning System (GPS) and Satellite Based Augmentation System (SBAS) signals received from 7 KASS reference stations. And the performances were analyzed in terms of the signal strength, statistics for each SBAS message, coverage of ionospheric correction, accuracy, integrity, continuity, and availability. In addition, the navigation solutions provided by commercial receiver was analyzed and the performance experienced by general users was presented. Lastly, directions for further improvement of the KASS system were addressed. These performance analysis results can be used to confirm the feasibility of utilizing KASS in user applications.