• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 가을 학술발표회 논문집(II)
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• pp.845-850
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• 2000

This paper presents the results of tests performed on the transfer girders which have been generally used between upper walls and lower frames in the hybrid structures. The 8 specimens were designed using (1) ACI method, (2) strut-tie model, and (3) X-type shear reinforcement cage. The capacities of the specimens are in general larger than the design values except the one designed according to strut-tie model. The reason for this difference seems to be due to the arbitrary allocation of transferred shear force to the path of direct compression strut and the path of indirect strut and tie. The failure modes turn out toe be (1) shear failure at critical shear zone, (2) compressive concrete crushing in the diagonal strut in the shear zone of transfer girder, and (3) compressive concrete crushing in the corner of upper wall.

• 한국CDE학회논문집
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• 제9권1호
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• pp.35-43
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• 2004

It is well known that the five-axis machining has advantages of tool accessibility and machined surface quality when compared with conventional three-axis machining. Traditional researches on the five-axis tool-path generation have addressed interferences such as cutter gouging, collision, machine kinematics and optimization of a CL(cutter location) or a cutter position. In the paper it is presented that optimal CL data for a face-milling cutter moving on a tool-path are obtained by incorporating TSS(tool swept surface) model. The TSS model from current CL position to the next CL position is constructed based on machine kinematics as well as cutter geometry, with which the deviation from the design surface can be computed. Then the next CC(cutter-contact) point should be adjusted such that the deviation conforms to given machining tolerance value. The proposed algorithm was implemented and applied to a marine propeller machining, which proved effective from a quantitative point of view. In addition, the algorithm using the TSS can also be applied to avoid cutter convex interferences in general three-axis NC machining.

• 국제지역연구
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• 제16권3호
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• pp.27-51
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• 2012

신고전주의 학자들은 한국의 산업화 과정이 '노동잉여' 모델에 따르고 있다고 주장해 왔다. 이 모델은 개발도상국들의 경제발전은 무한한 값 싼 노동력이 제조업 부문으로 이전되면서 진행되고, 따라서 산업화의 성공을 위해서는 노동집약적 기술이 사용되어야 한다는 점을 강조하고 있다. Fei와 Ranis는 일본의 초기 산업화 단계(1887-1915)에서 일본이 노동집약적 기술을 사용하였고 이는 일본의 경제발전을 이끌었다고 주장한다. 이에 본 논문은 한국 산업화 과정이 과연 이 모델에 기인하고 있는 지를 밝히고자 하는데 목적이 있다. 이의 검증을 위하여 Kelly와 Williamson이 고안한 신고전주의 이중모델의 기본 틀이 사용되었다. 이 모델 하에서 연산일반균형 (CGE) 방식을 통해 한국 산업화 기간 중 (1965-1992) 추정된 주요 경제변수와 실제 역사적 수치를 비교해 보았다. 검증 결과 두 수치 간에 큰 차이가 나타남을 확인하였는바 따라서 한국의 산업화 과정은 시장의 힘에 기초한 비교우위 생성의 결과라는 신고전주의 가설이 적용되지 않는다는 결론에 이르게 되었다.

• 가정과삶의질연구
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• 제32권5호
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• pp.163-178
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• 2014

The purpose of this study is to validate the mediating effects of anger expression types for anxiety on the violent behaviors of adolescent school violence offenders. For the purpose of this study, 114 adolescent school violence offenders and 178 general youths were selected. Through the structural equation model, the mediating effects of anger expression types that are manifested in the path of violent acts of adolescent school violence offenders and general youths are verified. The major findings of this study are as follows. First, for both groups, the same path of violent behavior through anger-in and anger-out was followed: youths repress anger when they have higher anxiety, and when too much anger is repressed, anger-out increases, which results in more violent behaviors. Second, the level of anxiety of adolescent school violence offenders has direct effect on the responsive violent behaviors while the level of anxiety of general youths does not have direct effect on violent behaviors. Third, although the anxiety of adolescent school violence offenders may increase violent behaviors through the paths of acting-in and acting-out, violent behaviors can be reduced by reducing anger-out. Therefore, to reduce the violent behaviors of adolescent school violence offenders, intervention is needed for those who repress their anger due to anxiety; professional education is also required for adolescent school violence offenders to help them control their anger.

• 간호행정학회지
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• 제14권2호
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• pp.107-117
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• 2008

Purpose: The aim of this study was to testify effectiveness and adaptability of the job characteristics model in nursing organization. Methods: The subjects of this study were 250 nurses who were working in the 2 general hospitals located in Metropolitan city area. The data were collected by self-reporting questionnaires. The data were analyzed using descriptive statistics and path analysis. Results: The modified path model revealed a highly fitness of the data in the overall fitness indexes. The prediction power of modified model was from 44% to 58%, which was very high. The highest predict factors of organizational commitment were identified meaning of empowerment and feedback of job characteristics. The highest predict factors of job satisfaction were identified impact of empowerment and autonomy of job characteristics. Conclusion: With these findings, it was suggested that the nursing job-redesign plan focused on nursing feedback and autonomy among the job characteristics was needed to increase the nurse’ empowerment as well as nursing organizational effectiveness.

• Structural Engineering and Mechanics
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• 제12권6호
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• pp.685-698
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• 2001

In this paper, a general method for the automatic search for Strut-and-Tie (S&T) models representative of possible resistant mechanisms in reinforced concrete elements is proposed. The representativeness criterion here adopted is inspired to the principle of minimum strain energy and requires the consistency of the model with a reference stress field. In particular, a highly indeterminate pin-jointed framework of a given layout is generated within the assigned geometry of the concrete element and an optimum truss is found by the minimisation of a suitable objective function. Such a function allows us to search the optimum truss according to a reference stress field deduced through a F.E.A. and assumed as representative of the given continuum. The theoretical principles and the mathematical formulation of the method are firstly explained; the search for a S&T model suitable for the design of a deep beam shows the method capability in handling the reference stress path. Finally, since the analysis may consider the structure as linear-elastic or cracked and non-linear in both the component materials, it is shown how the proposed procedure allows us to verify the possibilities of activation of the design model, oriented to the serviceability condition and deduced in the linear elastic field, by following the evolution of the resistant mechanisms in the cracked non-linear field up to the structural failure.

• 대한간호학회지
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• 제49권3호
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• pp.307-316
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• 2019

Purpose: This study was conducted to investigate the influence of emotional expressivity, emotional intelligence, affectivity, job autonomy, social support, and emotional labor on clinical nurses' individual well-being and to provide guidelines for interventions and strategies for its improvement. Methods: The sample consisted of 207 nurses recruited from a general hospital in Korea. The participants completed a structured self-report questionnaire comprising measures of emotional expressivity, emotional intelligence, positive affectivity, negative affectivity, job autonomy, supervisor support, coworker support, deep acting, surface acting, emotional exhaustion, and job satisfaction. Data were analyzed using SPSS statistics 22.0 and AMOS 22.0. Results: The final model was a good fit for the data based on the model fit indices. In the path analysis, surface acting, negative affectivity, supervisor support, and coworker support had statistically significant effects on emotional exhaustion, explaining 29.0% of the variance. Deep acting, emotional exhaustion, positive affectivity, and emotional intelligence had statistically significant effects on job satisfaction, explaining 43.0% of the variance. Conclusion: Effective strategies to improve clinical nurses' individual well-being should focus on surface acting, deep acting, affectivity, social support, and emotional intelligence. The results of this study can be utilized as base data to manage emotional labor and improve clinical nurses' individual well-being.

• 한국철도학회논문집
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• 제16권6호
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• pp.460-465
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• 2013

고속철도에서의 열차무선전파는 일반적인 이동통신전파와 달리 레일, 침목 및 자갈로 구성된 철로면 반사에 의해 불규칙적으로 수신되는 지면반사파의 영향을 받는다. 본 논문에서는 이와 같이 불규칙적으로 수신되는 철로면 반사파를 랜덤변수로 모의하고, 여기에 송수신간 직접 경로에 의한 직접파를 추가한 열차무선 전파모델을 제안하였다. 제안한 전파모델을 이용한 시뮬레이션 결과 열차무선에서의 경로손실지수는 3.0으로 분석되어, 일반적인 이동통신환경에서의 4.0에 비해 경로손실이 감소하는 것으로 나타났다. 또한, 고속철도 현장에서의 열차무선 수신전력 측정치에서도 동일하게 경로손실지수가 3.0으로 분석되었다. 이상과 같은 시뮬레이션 및 측정결과로부터, 열차무선 전파모델을 검증하고 경로손실지수를 도출할 수 있었으며, 이 결과는 고속철도 열차무선통신망의 커버리지 예측 및 기지국 설계에 응용할 수 있다.

• 정보관리학회지
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• 제22권4호통권58호
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• pp.61-78
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• 2005

이 연구는 공공도서관의 서비스품질(인쇄형태 출판물과 인터넷 및 전자자원, 문화프로그램 및 서비스, 도서관시설 및 환경, 직원)이 공공도서관의 이용에 따른 전반적인 만족도 및 불평의도, 충성도(재이용의도포함)에 미치는 영향을 밝히기 위한 것이다. 이를 위해 이 연구에서는 대구지역 8개 공공도서관의 이용자 443명을 대상으로 설문조사를 실시하였다. 선행연구에 대한 분석을 통해 제시한 인과적 모델을 설문데이터를 바탕으로 경로분석(path analysis)을 이용하여 검증하였다. 분석결과 인쇄형태 출판물과 문화프로그램 및 서비스, 도서관시설 및 환경, 직원은 각각 이용자의 전반적인 만족도에 통계적으로 유의한 영향을 미치는 것으로 나타났다. 도서관시설 및 환경의 품질은 공공도서관 이용자의 만족도와 충성도에 광범위한 영향을 미치는 것으로 나타났다.

• 전자공학회논문지 IE
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• 제46권1호
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• pp.31-36
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• 2009

본 논문에서는 송 수신 차량이 편도 2차선의 일반국도를 80[km/h]의 속도로 주행하고, 곡선 반경은 교통사고율이 높은 통계자료를 근거하여 280[m], 직선도로의 길이는 정지시거를 고려하여 140[m], 곡선의 길이는 90[m], 곡선도로를 11.25[m] 간격으로 8개 지점을 선정하여 시뮬레이션 하였다. 그 결과 송 수신 차량간 거리가 111[m] 이상이 될 경우에는 좌, 우측 반사체에 의해 이루어지는 반사파의 전파경로 보다는 인접한 차량들에 의해 이루어지는 반사파의 전파 경로가 반복 반사수가 증가함으로 더 갈어지게 된다. 송 수신차량간 거리가 111[m] 미만인 경우에는 수신차량에 전파가 도달하기 위한 반복 반사는 $1{\sim}2$[회]정도 이었으며 송 수신 차량이 위치한 차선에 관계없이 인접한 차량에 의해 발생하는 반사파 보다는 좌, 우측 반사체를 경유하여 수신하게 되는 반사파의 전파경로가 $1{\sim}1.5[m]$정도 더 큼을 알 수 있었다.