• 국제학술발표논문집
• /
• The 3th International Conference on Construction Engineering and Project Management
• /
• pp.1053-1059
• /
• 2009

Construction system modeling can enhance work performance by following the behaviors of a system. System behaviors may originate from physical aspects of a system, namely operation level variables, or from non-physical aspects of a system known as context level variables. However, construction system modelers usually focus on only one type of system variable (i.e., operation level or context level) which can lead to less accurate results. Hybrid modeling with System Dynamics (SD) and Discrete Event Simulation (DES) is one of the approaches that has been utilized to address this issue. In this research, an SD-DES hybrid model of a steel fabrication shop is developed, and the benefits of capturing context level variables together with operation level variables in the model are discussed.

• 한국정보시스템학회지:정보시스템연구
• /
• 제12권1호
• /
• pp.19-45
• /
• 2003

The ERP system comes to existence in the period of change. In other words, the ERP system is adopted to the company with BPR project. In general, the ERP system is introduced to companies as packages rather than in-housing systems. There are several researches in IS literatures which have a conclusion that organizational context affects the performance of ERP system. This study attempts to review the organizational context from the prospective of organizational structure and change management. Regarding the organizational structure, we choose some widely known variables such as the degree of formalization and centralization. For the analysis of change management, we set the variables, which are the most importantly considered, such as the power of CEO's promotion and user participation. The extent of customizing is introduced as moderating variables between the organizational context and the implementation performance. With collected data, we performed the reliability test, the factor analysis and the regression analysis. In summary, the introduction of an information system such as ERP system has a behavioral and organizational impact. The organizational change may breed resistance and opposition and can lead to the failure of the system. Therefore, implementation of the system requires careful change management, active involvement of users and high level of management support.

• 디지털융복합연구
• /
• 제19권10호
• /
• pp.119-132
• /
• 2021

본 연구는 기업가정신에 있어 성별 간 차이가 나타나는 현상 자체가 아닌 기업가정신의 성별 차이를 발생시키는 사회적 맥락의 영향을 확인하는 데에 초점을 둔다. 구체적으로 본 연구는 글로벌 기업가정신 트렌드 리포트(GETR)의 20개국 데이터를 사용하여 사회적 맥락이 성별과 기업가정신 간 관계에 미치는 조절효과를 검증하였다. 사회적 맥락의 함의와 관련된 가설검증을 위하여, 본 연구에서는 Hofstede의 문화차원 요인인 권력 거리, 개인주의, 남성성, 불확실성 회피와 제도적 요인인 양성평등, 사회보장을 사회적 맥락을 반영하는 구체적 변수로 사용하였다. GLM을 사용한 실증분석 결과 성별은 기업가 정신에 독립적으로 영향을 미치지 않았으며, 성별은 각각 권력 거리, 개인주의, 불확실성 회피, 양성 평등, 사회 보장 변수와 상호 작용하여 유의한 영향을 미치는 것으로 나타났다. 이와 같은 본 연구의 결과는 기업가정신의 성별 차이가 각 성별에 내재된 고유의 특성에 기인한 것이 아니라, 개인이 속한 그 국가의 사회적 맥락 수준에 따라 나타날 수 있음을 시사한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제12권1호
• /
• pp.248-268
• /
• 2018

The performance of smartphone applications are usually constrained in user interactions due to resource limitation and it promises great opportunities to improve the performance by exploring the smartphone built-in and embedded sensing techniques. However, heterogeneity in techniques, semantic gap between sensor data and usable context, and complexity of contextual situations keep the techniques from seamless integration. Relevant studies mainly focus on feasibility demonstration of emerging sensing techniques, which rarely address both general architectures and comprehensive technical solutions. Based on a proposed functional model, this investigation provides a general architecture to deal with the dynamic context for context-aware automation and decision support. In order to take advantage of the built-in sensors to improve the performance of mobile applications, an ontology-based method is employed for context modelling, linguistic variables are used for heterogeneous context presentation, and semantic distance-based rule matching is employed to customise functions to the contextual situations. A case study on mobile application authentication is conducted with smartphone built-in hardware modules. The results demonstrate the feasibility of the proposed solutions and their effectiveness in improving operational efficiency.

• 한국지구과학회지
• /
• 제39권4호
• /
• pp.378-387
• /
• 2018

In this research, the change of Korean middle-school science education environments is investigated through analyzing eighth graders' survey data collected over the past 20 years of TIMSS. We extracted educational context variables that provide meaningful information on changes of Korean science education, and have been surveyed more than 3 study cycles up to TIMSS 2015. The selected educational context variables include school resources and school climate from the school principal's questionnaires, and teacher characteristics and instructional activities from the teacher's questionnaires. For each context variable, we analyzed its trend over TIMSS cycles, and discussed its implications in light of Korean educational policy and curriculum changes. Based on the results, we recommended several ways that help to improve science teaching and learning in light of lab assistants, computer availability, teacher learning community, and middle school Earth science curriculum.

• Educational Technology International
• /
• 제18권2호
• /
• pp.249-263
• /
• 2017

The purpose of this study was to examine whether respondents showed gender differences in life- learning competency, self-directed learning ability, problem-solving ability, and academic achievement and to identify relationships among variables of university students in the context of higher education. To address those goal, the data set was analyzed that nationally collected from Korea Youth Competency Measurement and International Comparative Research III by National Youth Policy Institute in South Korea. 680 samples were used in the study that were 343 males and 337 females of university students. As results, statistically significant difference was showed in the participants' gender. Male university students were higher score than female university students in All variables. Also, learning agility in life-learning competency was strongly related to self-directed learning ability and problem-solving. Thinking skills in life-learning competency was strongly related to academic achievement in university students in higher education. In terms of learning strategy in the context of higher education, some suggestions have been made for university students.

• 한국학교수학회논문집
• /
• 제22권2호
• /
• pp.163-182
• /
• 2019

본 연구에서는 학생의 성취 수준에 따라 수학 성취와 흥미에 영향을 미치는 교육맥락변인에 차이가 있는지를 분석하고자 하였다. 이를 위해 TIMSS 2015에 참여한 4학년, 8학년 학생들을 각각 성취도 상위 집단(우수수준 이상)과 하위 집단(보통수준 이하)의 두 집단으로 구분하고, 집단별로 교육맥락변인이 수학 성취와 흥미에 미치는 영향을 위계선형모형을 적용해 분석하였다. 본 연구의 결과는 다음과 같다. 첫째, 성취도 상위 집단의 경우에 수학 성취도에 영향을 미치는 변인은 흥미에 영향을 미치지만 그 역은 성립하지 않는다. 그 중 도서 보유량과 학생의 수학 수업 인식은 수학 성취도와 수학 흥미에 영향을 미치는 강력한 변인이었다. 둘째, 성취도 하위 집단 학생들에게 영향을 미치는 변인은 성취도 상위 집단 학생들에게 영향을 미치지만, 그 역은 성립하지 않는다. 4학년의 경우에 도서 보유량, 가정 학습 환경, 취학 전 수리 활동이 하위 집단과 상위 집단의 성취도에 모두 영향을 주었다. 하지만 4학년에서 부모 학력, 학생의 수학 수업 인식 등은 상위 집단 학생들의 성취도에만 영향을 주었고 하위 집단 학생들의 성취도에 영향을 미치지 않았다. 수학에 대한 흥미의 경우에도 4학년과 8학년에서 하위 집단 학생들의 성취도에 영향을 미치는 변인인 학생의 수학 수업 인식은 상위 집단 학생들의 흥미에도 영향을 미쳤으나 도서보유량은 상위 집단 학생들의 흥미에만 영향을 미쳤다.

• 경영과학
• /
• 제27권3호
• /
• pp.197-211
• /
• 2010

This research applies Blattberg's CE (customer equity) model to B2B business context. Through the model we estimate customer lifetime value of a Korean semiconductor manufacturer. The results show that Blattberg model has limiting applicability to B2B business context. To overcome the limits, several suggestions were made. The main suggestion was predicting maintenance costs for different customers groups and including decision variables regarding marketing costs that would help building a differentiated CE model for the B2B business context.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제3권2호
• /
• pp.173-177
• /
• 2003

In the first part an overview on fuzzy sets and fuzzy numbers is given. A detailed treatment of these notions is introduced in [1,2,3]. This sintetically presentation is useful in understanding and in developping the applications in context problems. In the second part, fuzzy context model is given as an application of fuzzy sets and the fuzzy equilibrium equation is solved [4,5].

• International Journal of Human Ecology
• /
• 제11권1호
• /
• pp.35-47
• /
• 2010

Based on concepts of human ecology, this study explored how diverse systems- cultural setting, work context and maternal perception- shape paternal involvement in child care. For this purpose, I compared Korean fathers (n=93) and Korean sojourner fathers in the United States (n=129). Hypothesized structural equation model explaining direct and indirect relationships among variables was developed. The results showed that cultural context had no direct relationship with paternal involvement. Cultural context showed indirect influence on paternal involvement through fathers' work context. Maternal perception, which had significant relationship with paternal involvement, was not explained by cultural context. However, it was significantly influenced by work context.