• Journal of Convergence for Information Technology
• /
• v.8 no.2
• /
• pp.67-75
• /
• 2018

We sought to develop a multi-dimensional tool for measuring and understanding nurse fatigue. The participants were 301 nurses working in four hospitals in Seoul, South Korea. Basic items were developed after a preliminary literature review, and content validity was verified by a group of experts. The first 52 items from which the fatigue measurement tool was to be developed were tested for construct validity and were reduced via factor analysis to 31 items. Following a confirmatory factor analysis, the items were further reduced to 23 items in three categories: physical, mental, and emotional. A confirmatory factor analysis found the items to be adequate. The fatigue scale was found to have high construct validity and reliability. This scale is expected to serve as a preliminary data-gathering tool to assess the level of nurse fatigue and to develop interventions to alleviate it.

• Journal of the Korea Convergence Society
• /
• v.10 no.3
• /
• pp.307-317
• /
• 2019

The purpose of this study was to identify the effect of person-environment fit and job embeddedness on turnover Intention. The subjects conveniently extracted 150 nurses who work at 2general hospitals in B and U metropolitan cities for more than six months, and Analyses were made using the SPSS WIN 20.0 and AMOS 21.0 programs to identify the causal relationship between person-job fit, person-organizational fit, person-supervisor fit, job embeddedness and turnover Intention. As a result, the variables with direct effect and total effect on job embeddedness showed personal-job fit, personal-organizational fit, person-supervisor fit and explained 76.3% of the job embeddedness. The most significant direct effect on turnover intention was job embeddedness and personal-job fit, personal-organizational fit, Person-supervisor fit showed indirect effect, and job embeddedness explained 36% of the turnover intention. In conclusion, if the personal-job fit, personal-organizational fit, and personal-superior fit of the clinical nurse are improved, the job embeddedness are improved turnover intention will decrease and the turnover rate will be decreased. In addition, it is necessary to study various factors affecting the turnover intention of person-environmental fit on nurses.

• Proceedings of the Korean Information Science Society Conference
• /
• 1998.10a
• /
• pp.62-64
• /
• 1998

본 논문에서는 경성 실기간 시스템에서 발생하는 이벤트들을 효과적으로나타낼 수 있는 개선된 Statecharts 모델링 기법과 Statecharts에 Priority를 나타내는 방법을 제안한다. 일반적인 모델링 기법들은 데이터의 흐름이나 시스템의 분석에는 적합하게 사용된다. 그러나 임의적을 발생하는 이벤트에 대한 즉각적인 반응을 표현하기 어려운 단점이 있다. 본 논문에서는 기존의 모델링 기법들의 단점을 보완하고 Statecharts라는 모델링 기법의 장점들을 혼합하여 경성 실시간 시스템에 가장 적합한 개선된 Statecharts를 제안한다. 그리고 Statecharts 모델링 기법의 구조적인 특성에 맞는 새로운 방법의 Priority표현법을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2017.07a
• /
• pp.73-74
• /
• 2017

4차 산업혁명의 핵심 중 하나인 소프트웨어 교육에서 프로그래밍 교육은 필수적이다. 다양한 프로그래밍 언어 중 프로그래밍 입문자를 위해 적합한 언어를 선택하는 것은 매우 중요하다. 본 논문에서는 프로그래밍 입문을 위해 적합한 언어를 선택하기 위한 가이드를 제공하기 위해 2017학년도 1학기에 프로그래밍 입문 관련 교과목을 수강한 학생들을 대상으로 프로그래밍 언어에 대한 선호도를 조사하고 분석하여 언어 선택을 위한 가이드를 제안한다.

• Annual Conference of KIPS
• /
• 2003.05a
• /
• pp.337-340
• /
• 2003

다층 퍼셉트론(Multi-Layer Perceptron, MLP) 구조를 이용한 비선형 적합은 실제문제에 매우 다양하게 적용되고 있다. 이때 일반화된 MLP 구조의 적합을 위해서는 은닉노드의 개수 초기 가중값 그리고 학습 회수와 같은 구조인자들을 함께 고려해야 한다. 만약 구조인자들이 부적절하게 선택되었다면 일반화된 MLP 구조의 적합효율이 매우 저하될 수 있다. 그러므로 MLP 구조에 영향을 주는 인자들의 영향을 살펴보는 것은 중요한 문제다. 이 논문에서는 제어상자(controller box)를 통한 학습결과와 더불어 MLP 구조를 일반화할 때 영향을 줄 수 있는 구조인자(factor)들의 실증분석과 이들의 상대효과를 살펴본다.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• v.10 no.2
• /
• pp.21-30
• /
• 2000

본 논문에서는 이동통신환경의 특징과 기존의 키분배 프로토콜들에서 발생할 수 있는 공격들을 프로토콜 수행전 수행중, 수행후로 나누어서 살펴보고 이를 기반으로 이동통신환경에 적합한 키분배 프로토콜 설계에 필요한 요구사항 들을 제시한다 또한 제시된 요구사항을 기반으로 이동통신환경에 적합한 상호인증을 제공하는 키분배 프로토콜을 제안하고 제안한 프로토콜을 분석한다.

• Journal of Preventive Medicine and Public Health
• /
• v.29 no.2 s.53
• /
• pp.173-186
• /
• 1996

This is a cross-sectional study to evaluate the relationships between physical fitness, leisure time physical activity, and serum lipid levels in middle-aged male workers. Physical fitness was measured by a step test score, and leisure time physical activity was self-reported on a questionnaire. Serum total cholesterol was negatively related to physical fitness(r=-0.27), and positively to obesity index(r=0.27). But leisure time physical activity was related to total cholesterol negatively(r=-0.20) only in subjects whose total cholesterol levels were above 170mg/dl. High density lipoprotein(HDL) cholesterol was positively related to physical fitness(r=0.15), negatively to obestiy index(r=-0.22), and positively to weekly alcohol consumption(r=0.14). Total cholesterol/HDL cholesterol ratio was related to physical fitness(r=-0.23), obesity index(r=0.32), total cigarette index (r=0.13), weekly alcohol consumption(r=-0.13), and vegetable preference(r=0.13). Physical fitness was also related to leisure time physical activity(r=0.19) and obesity index(r=-0.18). In multiple linear regression models, physical fitness(beta=-0.23) and obesity index(beta=0.18) were significantly associated with total cholesterol, obesity index(beta=-0.25) with HDLcholesterol, and obesity index(beta=0.30), physical fitness(beta=-0.16) and vegetable preference (beta=0.14) with total cholesterol/HDL cholesterol ratio. In conclusion, as physical fitness has a stronger relationship with serum lipid levels than leisure time physical activity, and the association between physical fitness and leisure time physical activity is modest, physical fitness should be added as an important variable in addition to activity in future epidemiologic studies.

• Journal of the Korean Society of Hazard Mitigation
• /
• v.11 no.3
• /
• pp.201-208
• /
• 2011

When designing a river, it is important to select the appropriate bank revetment methods, but there are no specific guidelines until now. Accordingly, it is important to prevent over-budgeting by deciding the suitability of the adopted bank revetment methods when designing a river. In this study, an assessment method was developed to assess the suitability of the adopted bank revetment methods when designing a river. By adopting this method to eight rivers, its validity was examined. Analytic Hierarchy Process (AHP) was used for the assessment, along with suitability index (SI) of the adopted bank revetment methods when designing a river. In order to select the best bank revetment methods, all environmental variables of the selected location have to be considered. Accordingly, to assess the designed bank revetment methods, all variables of the selected location have to be considered. The assessing items include hydraulic stability, environmental-ecological feasibility, economy, and amenity of the bank revetment. Each item includes four to five sub-items, and each sub-items reflect survey results on the locations. The assessment method was adopted and assessed for eight rivers, and bank revetments was designed to determine the SI. The result of this study is considered to be appropriate when assessing an eco-friendly bank revetment methods, and inappropriate designed bank revetments will guide future planners for selecting the most appropriate construction method.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.27 no.6
• /
• pp.822-831
• /
• 2021

Although programs have been developed to evaluate the risk of dragging anchors, it is practically difficult for VTS(vessel traffic service) operators to calculate and evaluate these risks by obtaining input factors from anchored ships. Therefore, in this study, the gross tonnage (GT) that could be easily obtained from the ship by the VTS operators was set as an independent variable, and linear and nonlinear regression analyses were performed using the input factors as the dependent variables. From comparing the fit of the polynomial model (linear) and power series model (nonlinear), the power series model was evaluated to be more suitable for all input factors in the case of container ships and bulk carriers. However, in the case of tanker ships, the power supply model was suitable for the LBP(length between perpendiculars), width, and draft, and the polynomial model was evaluated to be more suitable for the front wind pressure area, weight of the anchor, equipment number, and height of the hawse pipe from the bottom of the ship. In addition, all other dependent variables, except for the front wind pressure area factor of the tanker ship, showed high degrees of fit with a coefficient of determination (R-squared value) of 0.7 or more. Therefore, among the input factors of the dragging anchor risk assessment program, all factors except the external force, seabed quality, water depth, and amount of anchor chain let out are automatically applied by the regression analysis model formula when only the GT of the ship is provided.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.43 no.3
• /
• pp.381-395
• /
• 2023

This paper presents a GIS-based site suitability analysis for a smart hydrogen energy plant in the Gangwon-Do region, South Korea. A GIS-based multi-criteria decision analysis (MCDA) was implemented in this study to identify the most suitable sites for the development of smart hydrogen energy plants. The study utilizes various spatial data layers, including hydrogen generation potential and climatic conditions, environmental and topographic conditions, and natural catastrophic conditions, to evaluate the suitability of potential sites for the hydrogen energy plant. The spatial data layers were then used to rank and prioritize the sites based on suitability. The findings revealed that 4.26% of the study area, or 712.14 km², was suitable for constructing smart hydrogen energy plants. Some regions of Cheorwon-gun, Chuncheon-si, Wonju-si, Yanggu-gun, Gangneung-si, Hoengseong-gun, and near the coastal region along the east coast were found to be suitable for solar and wind energy utilization. The proposed MCDA provides a valuable tool for decision-makers and stakeholders to make informed decisions on the location of smart hydrogen energy plants and supports the transition to a sustainable and low-carbon energy system. Decision-makers can use the results of this study to select suitable sites for constructing smart hydrogen energy plants.