• 지역사회간호학회지
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• 제24권3호
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• pp.302-313
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• 2013

Purpose: The purpose of this study was to identify factors in quality of life and to construct a model of quality of life in longevity region dwelling elders. Methods: Data were collected from January to July, 2010 through direct interviews and a self-reporting questionnaire survey with 171 subjects who were living at the S County (gun). The collected data were analyzed by using the SPSS/WIN 19.0 and AMOS 19.0 programs. Results: Economic status, social support, health behavior and depression were shown to have direct and total effects on quality of life and were statistically significant. Health status had indirect and total effects on quality of life and was statistically significant. And, self-efficacy had direct, indirect and total effects on quality of life and was statistically significant. These variables of the hypothetical model accounted for 41.4% of quality of life. Conclusion: In order to improve quality of life in longevity region dwelling elders, it is necessary to provide economic support and social support services in tandem with social welfare. And, we need to apply interventions strengthening self-efficacy, health behavior, and health status, and decreasing depression.

• 간호행정학회지
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• 제21권5호
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• pp.530-541
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• 2015

Purpose: This study was designed to construct a structural equation model and identify the effects and relationships of self-efficacy, career plateau, job embeddedness, organizational commitment and intent to turnover for nurses. Also, an attempt was made to derive a hypothetical model from these factors and to verify whether the model has validity as a means of explaining and anticipating turnover intention of nurses. Methods: Data were collected from six randomly selected hospitals: a university hospital located in J city, Kyungnam and five general hospitals located in two cities (cities B and C), each having 400 to 720 beds. Also, 318 nurses were surveyed. Data were analyzed using SPSS 21.0 and AMOS 18.0 program. Results: Job embeddedness and organizational commitment were identified as the most likely paths to turn over intention. Also, organizational commitment had the highest direct effect on turnover intention followed by job embeddedness and then self-efficacy, but career plateau had an indirectly effected turnover intention. Conclusion: As turnover intention was found to be greatly affected by organizational commitment and job embeddedness, methods to improve organizational commitment and job embeddedness should be actively developed to reduce turnover intention among nurses.

• Environmental Engineering Research
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• 제17권4호
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• pp.191-196
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• 2012

Analysis of hydrological safety as well as the determination of many substance concentrations are necessary when bioreactor systems are introduced to landfill operations. Therefore, hydrological and substance balance model was developed since it can be applied to various bioreactor landfill operation systems. For the final evaluation of the model's effectiveness, four different methods of injections (leachate alone, leachate and organic waste water, leachate and reverse osmosis concentrate, and all the above three combination) was applied to 1st landfill site of Sudokwon landfill. As a result, the water content of the hypothetical cases for four different systematic bioreactors is projected to be increased up to 35.5% in next 10 years, and this indicated that there will be no problems in meeting the hydrological safety. Also, the final $Cl^-$ concentration after 10-yr time period was projected to be between from minimum 126 to maximum 3,238 mg/L, which could be still a decrease from the original value of 3,278 mg/L. According to the proposed model, whether the substance concentration becomes increased or decreased largely depends on the ratio of initial quantity of inner landfill leachate and the rate of injection.

• 대한산업공학회지
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• 제1권2호
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• pp.27-38
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• 1975

This paper explores a quantitative decision-making system for planning production, inventories and work-force in a multi-item production system. The Multi-item Parametric Decision Rule (MPDR) model, which assumes the existence of two types of linear feed-back rules, one for work-force level and one for production rates, is basically an extension of the existing method of Parametric Production Planning (PPP) proposed by C.H. Jones. The MPDR model, however, explicitly considers the effect of manufacturing progress and other factors such as employee turn-over, difference in work-days between month etc., and it also provides decision rules for production rates of individual items. First, the cost relations of the production system are estimated in terms of mathematical functions, and then decision rules for work-force level and production rates of individual items are establised based upon the estimated objective cost function. Finally, a direct search technique is used to find a set of parameters which minimizes the total cost of the objective function over a specified planning horizon, given estimates of future demands and initial values of inventories and work-force level. As a case problem, a hypothetical decision rule is developed for a particular firm (truck assembly factory).

• 교육시설 논문지
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• 제28권6호
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• pp.15-28
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• 2021

This study aims to propose a hypothetical urban neighborhood, HanGyo-dong, which is a model for understanding the relationship between the neighborhood change and educational facilities. Three issue layers of the model derived from preceding case studies are: establishment, relocation and redevelopment of educational facilities; formation and redevelopment of adjacent residential areas; and growth of neighborhood commercial cores. The neighborhood changes observed through HanGyo-dong include (1) the formation of educational base and commercial activities along the stream, (2) the growth of student and intellectual community and the installment of public transportation nodes, and (3) the relocation of schools and hospitals followed by a series of redevelopments of single family house into multi-family housing of low-rise residence and high rise apartment complex. The findings call for the collaborative practice of educational administration and neighborhood planning regarding how educational facilities, which were the tool for urban expansion policy, will contribute to the development of the neighborhood's identity as a localized hub.

• 한국보건간호학회지
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• 제36권1호
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• pp.47-58
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• 2022

Purpose: This study was undertaken to present an effective plan for the development of an educational program and a strategy to promote patient safety management activities for nursing students by identifying factors that affect these activities based on the theory of planned behavior. Methods: A self-report questionnaire was distributed to 300 nursing students who had clinical practice experience at three nursing colleges in Daejeon, Gyeongbuk, and Jeonbuk. The significance of the model fit, and the path effect was confirmed by confirmatory factor analysis. Results: The hypothetical model for patient safety management activities was appropriate. Among the 5 pathways, 4 were significant. It was found that behavioral intention had a direct influence on patient safety management activities, and perceived behavioral control and attitude had an influence on behavioral intention. Conclusion: To strengthen the perceived behavioral control of nursing students' patient safety management activities, it is necessary to analyze and remove obstacles and provide education that reflects the characteristics of the subject's health problems. In addition, through self-directed learning involving simulation practice, nursing students should be exposed to patient safety accidents, so that they can recognize the risks early and solve problems through critical thinking while bringing about the necessary changes in their attitude.

• Nuclear Engineering and Technology
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• 제53권3호
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• pp.833-841
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• 2021

During the postulated severe accident of nuclear reactor, eutectic reaction leads to low-temperature melting of fuel cladding and early failure of core structure. In order to model eutectic melting with the moving particle semi-implicit (MPS) method, the eutectic reaction model is developed to simulate the eutectic reaction phenomenon. The coupling of mass diffusion and phase diagram is applied to calculate the eutectic reaction with the uniform temperature. A heat transfer formula is proposed based on the phase diagram to handle the heat release or absorption during the process of eutectic reaction, and it can combine with mass diffusion and phase diagram to describe the eutectic reaction with temperature variation. The heat transfer formula is verified by the one-dimensional melting simulations and the predicted interface position agrees well with the theoretical solution. In order to verify the eutectic reaction models, the eutectic reaction of uranium and iron in two semi-infinite domains is simulated, and the profile of solid thickness decrease over time follows the parabolic law. The modified MPS method is applied to calculate Transient Reactor Test Facility (TREAT) experiment, the penetration rate in the simulations are agreeable with the experiment results. In addition, a hypothetical case based on the TREAT experiment is also conducted to validate the eutectic reaction with temperature variation, the results present continuity with the simulations of TREAT experiment. Thus the improved method is proved to be capable of simulating the eutectic reaction in the severe accident.

• 대한공업교육학회지
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• 제36권2호
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• pp.111-130
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• 2011

이 연구는 기술교사의 변화몰입과 기술교육혁신 요구, 커뮤니케이션 및 자기효능감의 구조적 관계를 구명하기 위한 것으로, 문헌연구와 조사연구에 의하여 수행되었다. 변인 간의 가설적 모형의 적합성을 검증하기 위해 카이자승, 근사치 오차평균제곱근(RMSEA), 적합지수(GFI), 조정적합지수(AGFI), 표준적합지수(NFI), 비교적합지수(CFI) 등을 활용하였다. 연구의 결과에 의하면, 첫째, 기술교육 혁신요구는 기술교사들 간 커뮤니케이션과 변화몰입에 직접적인 영향을 주는 것으로 나타났다. 둘째, 기술교사들 간 커뮤니케이션은 변화몰입에 직접적인 영향을 미치는 것으로 나타났다. 셋째, 자기효능감은 기술교사들의 변화몰입에 직접적으로 영향을 미치는 것으로 나타났다. 따라서, 기술교사들이 변화에 몰입하여 기술교육이 더욱 발전하고 활성화되기 위해서는 기술교사들 간에 활발한 커뮤니케이션이 이루어져야 하며, 무엇보다도 기술교사들이 기술교육의 현황을 분명하게 인식함으로써 기술교육 혁신의 필요성에 공감하도록 할 필요가 있다. 또한, 기술교사들의 자기효능감을 제고하기 위한 정책적인 노력이 있어야 할 것으로 판단된다. 기술교사들의 기술교육혁신 요구, 변화몰입, 커뮤니케이션, 자기효능감 등의 관계를 분석하기 위한 이 연구는 기술교육 분야에서는 처음으로 시도된 것으로 추후에 관련 연구가 이어져야 할 것이다. 특히, 기술교사들의 변화몰입에 영향을 미치는 체계적인 변인 도출, 기술교육 혁신을 성공적으로 이루어내기 위한 방안 등의 연구가 요구된다.

• 한국초등과학교육학회지:초등과학교육
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• 제42권1호
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• pp.109-126
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• 2023

이 연구는 초등 예비교사가 모의수업 시연에서 구성한 과학적 추론을 증거-설명의 연속선 관점에서 해석하여 그들의 과학적 추론이 갖는 인식론적 의미를 조사하였다. 연구를 위해 계절 변화에 관한 모의 수업을 시연한 예비교사 2명, 고기압과 저기압 및 바람에 관한 모의수업을 시연한 예비교사 2명이 연구 참여자로 선정되었다. 예비교사의 교수발화 중에서 귀납적, 연역적(가설-연역적) 추론, 또는 귀추적 추론의 사례가 드러난 에피소드에서 각 추론이 증거-설명의 연속선의 단계에서 어떤 역할을 하는지 비교하여 예비교사의 과학적 추론이 가진 인식론적 의미를 분석하였다. 계절 변화의 원인에 관한 모의수업을 시연했던 두 예비교사는 학생들이 수집한 데이터를 비교하여 증거를 인식하였고, 증거와 가설을 비교하여 가설을 검증하는 가설-연역적 추론을 활용하여 설명을 구성하였다. 고기압과 저기압 및 바람의 방향을 주제로 모의수업을 시연했던 두 예비교사는 모둠별 데이터를 종합하여 증거로 인식하는 귀납적 추론과 선형적 논리 구조를 가진 연역적 추론을 설명구성 전략으로 선택하여 최종 설명을 제시하였다. 연구에 참여한 예비교사들은 유사한 주제의 모의수업 시연에서 대체로 비슷한 흐름의 과학적 추론을 활용하여 과학지식을 구성하였으나, 증거-설명의 연속선에서 데이터, 증거, 모델, 설명으로 전개되는 인식론적 의미 측면에서 조금씩 다른 양상을 보였다. 또한, 일부 사례를 제외하면, 공통적으로 증거에서 모델을 탐색하는 과학적 추론은 부족하였으며, 가설이나 설명모델을 추리하기 위한 귀추적 추론이 부재하였다. 이 연구에서 분석틀로 적용했던 증거-설명의 연속선 접근은 과학적 추론의 인식론적 의미를 파악할 수 있게 하며 대안적인 과학적 추론 함양 지도 방법으로 사용될 수 있음을 논의하였다.

• 치위생과학회지
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• 제15권6호
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• pp.807-814
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• 2015

이 연구는 횡단면 조사연구로 Pender (1996)의 건강증진모형에 관한 선행 문헌고찰을 통해 청소년의 구강건강증진행위를 설명, 예측하는 가설적 모형을 구성하고, 모형의 적합성과 제시된 가설을 PLS 구조방정식 모형 분석을 통하여 검증하여 다음과 같은 결론을 얻을 수 있었다. 대안학교 고등학생의 구강건강증진행위에 미치는 영향에서 지각된 유익성, 통제의 소재, 자기 효능감, 자아 존중감이 높을수록 구강건강증진행위가 높아지는 것으로 나타났다. 간접효과를 검정한 결과에서는 주관적 구강건강상태가 좋을수록, 과거 구강건강관련행위를 잘할수록 구강건강증진행위가 높아지는 것으로 나타났다. Pender의 건강증진모형을 이용하여 구성한 대안학교 청소년의 구강건강증진 예측모형은 구강건강증진행위를 설명하고 예측하는 데 유용한 것으로 판단되었다. 따라서 향후에는 구강건강증진 예측모형에 입각한 구강건강증진방안이 개발되어야 할 것이다.