• 에너지공학
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• 제20권3호
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• pp.200-208
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• 2011

한국수력원자력(주)은 원자력발전소 설비를 체계적으로 정의하여 관리하고 있으며 효과적인 유지보수 및 예방정비최적화를 위하여 설비마다 기능적중요도등급을 부여하여 운영하고 있다. 하지만 기존의 설비 중요도등급 결정은 설비가 갖고 있는 역할(기능) 측면보다는 기기 수준에서 수행하다 보니 발전소간, 계통간 및 엔지니어간 분류기준에 대한 해석차이로 많은 편차가 발생하여 반복된 작업이 수행되었다. 이를 보완하고자 정비규정을 활용한 기능중심체계에서 설비중요도분류 방법론을 개발하고 신규원전에 대하여 기능적 관점으로 설비중요도결정 작업을 수행하였다. 또한 각 기기에 대한 중요도결정 근거를 체계적으로 문서화함으로서 발전소 적용 시 운영자로 하여금 결정내역에 대한 이해와 활용을 용이하도록 하였다.

• 한국압력기기공학회 논문집
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• 제9권1호
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• pp.1-7
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• 2013

In around 2000, the U.S. NPPs have developed the various advanced engineering processes based on the INPO AP-913(Equipment Reliability Process Description) and showed the high performance in availability. With these benchmarking cases, the Korean NPPs have introduced the advanced engineering technology since 2005. The first step of the advanced engineering is to analyze and determine component importance for all components of a plant. This process is called Functional Importance Determination(FID). These results are basically utilized to determine the priority with limited resources in various areas. However, because the consistency of FID results is insufficient despite applying the same criteria in the existing operating NPPs, the degree of application is low. Therefore, this paper presents the improved methodology for FID interfacing system functions of Maintenance Rule Program and results of Single Point Vulnerability(SPV). This improved methodology is expected to contribute to enhance the reliability of FID data.

• 에너지공학
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• 제26권2호
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• pp.12-22
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• 2017

국내 가동원전은 안전성 및 설비 신뢰도 제고를 위해 엔지니어링 프로그램들을 이행하고 있다. 엔지니어링 프로그램에는 설비의 정비효과를 감시하는 정비규정(MR), 예방정비 프로그램 개발 및 설비관리 우선순위 결정을 위한 기능적중요도결정(FID), 발전설비 불시정지 최소화를 위한 발전정지유발기기(SPV) 및 효율적 작업관리를 위한 기능적설비그룹(FEG) 등이 있다. 최근에 건설 중인 APR1400형 원전도 운영초기 단계부터 엔지니어링 체계 정착을 위해 고유 설계특성을 반영하여 급수공급계통의 엔지니어링 프로그램들을 개발하였으며, 향후 운영단계에서 프로그램 이행을 통해 각 프로그램의 적합성을 검증할 예정이다. 결과적으로 신규원전 고유 설계특성을 반영하여 개발한 엔지니어링 프로그램 이행을 통해 APR1400 급수공급계통의 신뢰성이 향상될 것으로 기대된다.

• 경영과학
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• 제11권2호
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• pp.133-146
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• 1994

This study compares the performance of neural networks and ordinary least squares regression with quality-control processes. We examine the applicability of neural networks because they do not require any assumptions regarding either the functional from of the underlying process or the distribution of errors. The coefficient of determination($R^2$), mean absolute deviation(MAD), and the mean squared error(MSE) metrics indicate that neural networks are a viable and can be a superior technique. We also demonstrate that an assessment of the magnitude of the neural notwork input layer cumulative weights can be used to determine the relative importance of predictor variables.

• 융합보안논문지
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• 제14권6_2호
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• pp.63-72
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• 2014

이 연구는 경찰공무원의 조직문화와 직무특성 및 직무지속의지를 규명하는데 있다. 이 연구는 2012년 수도권소재(서울) 경찰공무원들을 연구대상으로 선정한 후 판단표집법(judgment sampling method)을 이용하여 최종분석에 이용된 사례 수는 총 187명이다. 분석방법은 SPSSWIN 18.0을 이용하여 빈도분석, 요인분석, 신뢰도분석, 다중회귀분석 등을 실시하였다. 결론은 다음과 같다. 첫째, 경찰공무원의 조직문화는 직무특성에 영향을 미친다. 즉, 개발합의적 문화, 위계적 문화가 형성될수록 피드백은 증대되며, 위계적 문화, 합리적 문화가 형성될수록 직무중요성은 높다. 또한, 개발합의적 문화가 형성될수록 자율성은 높다. 둘째, 경찰공무원들의 조직문화는 직무지속의지에 영향을 미친다. 즉, 개발합의적 문화가 형성되면 직무기대만족은 증대 되는 반면 고의적불성실은 감소한다. 또한 위계적 문화가 형성될수록 위기지각 행동은 증가한다. 셋째, 경찰공무원의 직무특성은 직무지속의지에 영향을 미친다. 즉, 피드백과 직무중요성이 부각되면 직무기대만족은 증대되는 반면, 기능다양성은 감소한다. 또한 피드백 기능이 부각되면 위축요인을 감소한다. 직무중요성을 높게 인식할수록 고의적불성실을 증대되는 반면, 기능다양성은 감소한다. 기능다양성을 높게 인식할수록 대안기대는 증가하며, 직무중요성, 자율성, 기능다양성을 높게 인식할수록 위기지각은 증대된다.

• 한국가금학회지
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• 제46권4호
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• pp.287-296
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• 2019

Avian sex determination system involves the male ZZ and female ZW chromosomes. However, very few studies are reported the expression, functional role and importance of genes on the W chromosome because of its small and highly heterochromatic genomic regions. Recent studies demonstrated that the W chromosome may have critical roles in physiology, sex determination and subsequent sexual differentiation in chickens. Therefore, gene annotation, including describing the expression and function of genes in the chicken W chromosome, is needed. In this study, we have searched the W chromosome of chickens and selected a total of 36 genes to evaluated their specific expression in the testis and ovary at various developmental stages such as embryonic day 6 (E6), hatch and adult. Interestingly, out of 36 genes in chicken W chromosome, we have found seven female-specific expression at E6.5 day, indicating that they are functionally related to female chicken gonadal differentiation. In addition, we have identified the stage specific gene expression from the sex specific genes. Furthermore, we analyzed the relative location of genes in the chicken W chromosome. Collectively, these results will contribute molecular insights into the sexual determination, differentiation and female development based on the W chromosome.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제19권4호
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• pp.47-60
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• 2013

Purpose: This study examines construction core plans for the users of vertical-typed general hospitals to effectivly use the flow line. Methods: The study sampled representative 9 hospitals, calculated the depth value through Convex Map of Space Syntax and Justified Graph according to the determination of form of construction cire, and analyzed its functional connectivity. Results: The analysis of the connectivity between operation core part and emergency part of core space with high importance in the hospitals showed that the types of hospital and hospital have the lowest depth value in the spatial phase diagram, where central treatment part and outpatient part are arranged well vertically. Elevators for patients at these hospitals are close to operation and emergency parts actually separated from the elevators for passengers. For shortening of flow line of patients and private movement environment, however, it is desirable to arrange the elevators for patients to be adjacent to the operation parts and to arrange the emergent patient entrances more effectively to separate them from the flow line of visitors and guardians. Implications: Consideration should be taken into account for the effective flow line design. This study hopefully may serve as a stepping stone for the standard design of horizontal/vertical flow line.

• 한국인구학
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• 제12권1호
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• pp.74-85
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• 1989

Ascertaining the actual growth rate of the population is an issue that has generated a lot of arguments amongst various scholars in the process of determining the actual census count. As such, this has had a pronounced effect in the determination of the actual growth rates for different urban populations in the country. But the effect centres much when it comes to accurately determining the major components or the factors contributing to the rapid growth of urban populations. The problem of rapid population growth centres much on its effects on the available basic social services and amenities provided for the people in these areas. Factors such as levels of medical knowledge and services, nutrition, quantity and quality of housing etc. to some extent influence the quality and duration of lives of the people. As such, their importance cannot be overemphasized when dealing with the issue of population growth. The study aims to examine the rate of population growth in the Federal Capital City, Abuja with respect to the available public provision of basic social services among other objectives. The findings from the data obtained from the Population Survey conducted in the city in 1985 show that the health care facilities available in the capital city are grossly inadequate to serve the entire inhabitants of the city. Moreso, the volume of in-migration into the city also compounds the health problems facing the city. The conclusion is that there is need for more resources to be allocated to the health sector to guarantee adequate and functional health care services in the city.

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 2003년도 한국해안해양공학발표논문집
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• pp.208-215
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• 2003

Convective-diffusion equations appear in various disciplines such as hydrology, chemical engineering and oceanography dealing with the transport problem of scalar quantities. Since it is nonlinear, numerical methods are generally used to obtain its solution. Very limited number of analytical solutions are available usually in cases when the convective velocity is constant or has a simple functional form (for some collection of the solutions, see Noye, 1987). There is however a continuing need to develop analytical solutions because of its practical importance. Analytical solutions of the convection-diffusion equation are valuable not only for the better understanding on the transport process but the verification of numerical schemes. (omitted)

• Genomics & Informatics
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• 제20권4호
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• pp.41.1-41.9
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• 2022

The pathogen Gallibacterium anatis has caused heavy economic losses for commercial poultry farms around the world. However, despite its importance, the functions of its hypothetical proteins (HPs) have been poorly characterized. The present study analyzed the functions and structures of HPs obtained from Gallibacterium anatis (NCTC11413) using various bioinformatics tools. Initially, all the functions of HPs were predicted using the VICMpred tool, and the physicochemical properties of the identified virulence proteins were then analyzed using Expasy's ProtParam server. A virulence protein (WP_013745346.1) that can act as a potential drug target was further analyzed for its secondary structure, followed by homology modeling and three-dimensional (3D) structure determination using the Swiss-Model and Phyre2 servers. The quality assessment and validation of the 3D model were conducted using ERRAT, Verify3D, and PROCHECK programs. The functional and phylogenetic analysis was conducted using ProFunc, STRING, KEGG servers, and MEGA software. The bioinformatics analysis revealed 201 HPs related to cellular processes (n = 119), metabolism (n = 61), virulence (n = 11), and information/storage molecules (n = 10). Among the virulence proteins, three were detected as drug targets and six as vaccine targets. The characterized virulence protein WP_013745346.1 is proven to be stable, a drug target, and an enzyme related to the citrate cycle in the present pathogen. This enzyme was also found to facilitate other metabolic pathways, the biosynthesis of secondary metabolites, and the biosynthesis of amino acids.