• Journal of Convergence for Information Technology
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• v.10 no.9
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• pp.173-182
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• 2020

In recent years, collaborative learning in university courses has been emphasized in order to improve collective intelligence. Based on literature reviews, individual creativity was used as a variable of personal characteristic, team trust and collective efficacy were used as variables of teams to see the relationship with collective intelligence as a variable of learning outcome. Data were collected from 770 students from A University in Gyeonggi-do, H University in the Daejeon, and K University in Chungcheong-do, and analyzed by using structural equations modeling. As results, individual creativity had significant influence on collective efficacy and collective intelligence. Team trust also had significant influence on collective efficacy and collective intelligence. In addition, collective efficacy had a positive effect on collective intelligence. This study will be able to utilize basic data for establishing instructional design and strategies of collaborative learning in the universities.

• Journal of Educational Research in Mathematics
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• v.22 no.3
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• pp.331-352
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• 2012

The purpose of the study is to verify what cognitive variables have significant effect on proportional problem solving. For this aim, the study classified proportional problem into well-structured, moderately-structured, ill-structured problem by the level of structuredness, then classified the cognitive variables as well into factual algorithm knowledge, conceptual knowledge, knowledge of problem type, quantity change recognition and meta-cognition(meta-regulation and meta-knowledge). Then, it verified what cognitive variables have significant effects on 6th graders' proportional problem solving abilities through multiple regression analysis technique. As a result of the analysis, different cognitive variables effect on solving proportional problem classified by the level of structuredness. Through the results, the study suggest how to teach and assess proportional reasoning and problem solving in elementary mathematics class.

• Proceedings of the Korea Contents Association Conference
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• 2019.05a
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• pp.295-296
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• 2019

본 연구는 노인의 삶의 질 향상에 대한 관심으로부터 출발하여 인구의 고령화에 따라 늘어난 노후에 대한 준비로 삶의 만족도 수준을 높이는 것을 궁극적인 목표로 삼았다. 이를 위해 노후준비의 하위 유형을 신체적 노후준비, 경제적 노후준비, 정서 사회적 노후준비로 구성하여 이를 다중 독립변인으로 설정하였다. 또한 사회적 지지를 매개변인, 삶의 만족도를 종속변인으로 하여 각 변인 간 구조적 관계를 밝히고, 노후준비의 하위 유형과 삶의 만족도 간 사회적 지지가 매개효과를 갖는지 검증하고자 하였다. 본 연구의 대상은 국민노후보장패널(Korean Retirement and Income Study: KReIS) 3차 및 5차 부가조사 자료로부터 추출한 65세 이상의 노인 4,058명이다. 자료 분석을 위해서는 SPSS 25.0과 SPSS PROCESS macro v2.16을 활용하였다. 연구결과 노후준비의 하위 유형 중 정서 사회적 노후준비는 삶의 만족도에 유의미한 직접효과를 발생시켰을 뿐만 아니라, 사회적 지지의 매개를 통해서도 삶의 만족도에 영향을 미치는 결과를 보였다. 이러한 연구결과를 바탕으로 노인의 삶의 만족도를 달성하는 데 중요한 변수인 정서 사회적 노후준비와 사회적 지지 제고를 위한 사회복지 정책 및 실천적 방안을 제언하였다.

• Journal of the Korean School Mathematics Society
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• v.13 no.2
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• pp.205-224
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• 2010

This paper examined what structural relationship metacognition and flow, which are identified as major variables that positively influence creative problem solving ability, had with mathematics creative problem solving ability. For this purpose, the Mathematics Creative Problem Solving Ability Test (MCPSAT) was given go 196 general second-year middle school students, and their cognitive and affective states were measured with metacognition and flow tests. The three variables' relationships were examined through a correlation analysis and, through structural equation modeling, the mediating effect of flow was tested in the structural relationships between the three variables and in the relationship between metacognition and mathematics creative problem solving ability. The results of the research show that metacognition did not directly influence mathematics creative solving ability, but exerted influence through the mediating variable of flow. A more detailed examination shows that while metacognition did not influence fluency and originality from among the measured variables for mathematics creative problem solving ability, it did directly influence flexibility. In particular, metacognition's indirect influence through the mediating variable of flow was shown to be much stronger than its direct influence on flexibility. This research showed that the students' high metacognition ability increased flow degree in the problem solving process, and problem solving in this state of flow increased their mathematics creative problem solving ability.

• The Journal of Korean Academy of Prosthodontics
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• v.56 no.2
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• pp.114-119
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• 2018

Purpose: Patients who treated implant immediate loading within a week after implant placement at Wonkwang University Dental Hospital Implant Center were evaluated marginal bone resorption. These retrospective analyses are intended to reinforce the clinical evidence for the implant immediate loading. Materials and methods: Medical history and radiographic data were investigated, which were the patients' who treated implant immediate loading and restoration with provisional prostheses between January 2005 and June 2016, at Wonkwang University Dental Hospital Implant Center. Total number of implants was 70, marginal bone resorption was measured according to implant length, diameter and connection type. To measure marginal bone resorption, periapical radiographs were taken when the implants were placed and after 6 month. Statistical analysis was done in Mann-whitney U test and Kruskal-wallis test with SPSS 22.0 software (P<.05). Results: Mean marginal bone resorption around immediately loaded implants according to implant connection type was shown $1.24{\pm}0.72mm$ in internal hexagon connection type and $1.73{\pm}1.27mm$ in external hexagon connection type. There was no statically significant difference in marginal bone resorption with implant length and diameter. Conclusion: Implants with immediated loading in internal hexagon connection type showed less marginal bone resorption significantly than in external hexagon connection type.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.364-372
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• 2016

This study examined the multi-phrased effects and outcomes of adult female learners who participated in lifelong learning activities, as well as the proposed structural relationships among the five latent variables. Questions established to achieve the purpose of the study are as follow: What effects do the learner's characteristics, lifelong education institutions, learning flow, and learning satisfaction have on the learning come? The participants of the survey numbered 632, but 54 respondents who were unreliable or did not complete their survey were excluded. A total of 578 cases were analyzed for this research. The structural relationships among the five latent variables-learner's characteristics, lifelong education institutions, learning flow and learning satisfaction, and learning outcome of the adult female learners-AMOS 18.0 program were also used for structural analysis. The major findings of this research are as follows. First, the model fitness showed that the hypothetical model provided a reasonable fit to the data ${\chi}^2=224.267$ (df=69, p<.001), RMSEA=.062, TLI=.943, RFI=.920, CFI=.957, IFI=.957, NFI=.939. Second, the learner's characteristics ( =.218, p<.001) and lifelong education institutions ( =.301, p<.001) have a direct effect on the learning outcomes. The learning flow ( =-.149 p=.541) does not have a direct effect on the learning outcome. Learning satisfaction ( =.405 p<.001) have a direct effect on the learning outcome. To put findings above together, in respect to adult female learners' performances, the learning outcomes are influenced directly by the learner characteristics, conditions of the lifelong education institutions, and learning satisfaction, whereas satisfaction indirectly affects the learners' learning outcome.

• Journal of The Korean Association For Science Education
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• v.43 no.1
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• pp.37-47
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• 2023

The purpose of this study is to analyze the influence and structural relationship of variables related to science teaching professionalism. These variables set up learning organizational culture as exogenous variables and science epistemological beliefs and science teaching efficacy as endogenous variables. For this study, a survey was conducted with 499 elementary science teachers from Seoul and Gyeonggi province participating. The results of this study are as follows: Science epistemological beliefs and science teaching efficacy were found to directly affect science teaching professionalism. In addition, learning organizational culture perceived by the teachers did not show significant effects on the science teaching professionalism, but it was found that it has direct significant effects on science epistemological beliefs and science teaching efficacy. Based on the results of this study, which examines the structural relationship between learning organizational culture, science epistemological beliefs, science teaching efficacy and science teaching professionalism. we deem that it is necessary to consider internal factors of teachers as well as ways to improve learning organizational culture.

• Proceedings of the Korean Nuclear Society Conference
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• 1995.05b
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• pp.1017-1023
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• 1995

본 연구는 원자로 격납건물 내압해석에 있어 대표적 기하학적 변 단면을 변수로 하여 그 영향을 분석함으로써 격납건물 구조건전성시험(SIT : Structural Integrity Test)시 정확한 계측계획의 수립 및 시험결과와 비교 평가를 위한 해석상의 고려사항을 도출하고자 수행되었으며, 장비출입구 주변의 단면 설계를 위한 부분모델 작성시 고려되어야 하는 비 영향 영역 범위를 설정하고자 수행되었다. 해석결과 본 논문에서 고려된 대표적 기하학적 변단면의 영향이 비교적 큰 것으로 평가되어 격납건물 구조건전성 시험의 수행 및 평가에 고려되어야 할 요소가 도출되었으며 부분모델 작성시 고려되어야 하는 비영향 영역을 설정 할 수 있었다.

• Journal of Biomedical Engineering Research
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• v.21 no.2
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• pp.181-187
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• 2000

동맥의 일부분이 팽창하는 동맥류는 파열로 인한 높은 사망률을 야기한다. 동맥류의 발생 및 파열에는 혈관벽의 구조적 약화와 혈류에 의한 응력이 중요한 역할을 하며, 혈류에 의해 혈관벽에 가해지는 전단응력은 간접적으로 혈관벽 구조를 변화시키고, 직접적으로 혈관벽에 응력을 가하므로 동맥류 파열에 영향을 미치는 중요한 혈류역학적 인자이다. 동맥류가 자주 발생하는 복부대동맥류 모델을 제작하여 정상류와 맥동류 유동에서 광색성 염료를 이용한 유동가시화 방법으로 벽 전단변형률을 측정하였다. 벽전단변형률은 동맥류 내부에서 감소하여 음의 값을 가지며, 동맥류 최대확장부 후부에서 다시 증가하여 확장부가 끝나는 위치에서 동맥 벽에 비해 약 1.5배 정도의 큰 전단변형률 값을 가졌다. 동맥류 최대확장부 후부에서는 벽전단변형률의 방향의 바뀌며, 위치에 따른 전단변형률의 변화가 크게 나타났다. 맥동류 유동에서는 동맥류의 위치에 따라 시간에 따른 벽전단형률 파형이 측정되었다. 동맥류 내부에서는 전단변형률의 크기가 작고 그 방향이 시간에 따라 변화가 심하였으므로 혈관벽의 구조변화가 발생하기 쉬운 지역으로 지목된다. 동맥류 최대 확장부 후부는 위치 및 시간에 따른 전단변형률의 변화가 심하며, 혈관벽 응력이 최대값을 갖는 지역이므로 동맥류의 파열이 발생하기 쉬운 지역으로 예측된다.

• Journal of The Korean Association For Science Education
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• v.21 no.3
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• pp.497-505
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• 2001

In this study, the relationships among students' conceptual understanding of molecular structure and cognitive variables were investigated for 165 high school students. After they had learned 'High School Chemistry II' for two semesters, the tests of conception concerning molecular structure, spatial visualization ability, logical thinking ability, mental capacity, and learning approach were administered. The results indicated that students' conceptual understanding of molecular structure was not sound, and several misconceptions were found. The scores of the conception test were significantly correlated with all the cognitive variables studied. Multiple regression analyses were conducted to examine the predictive influences of students' cognitive variables on their conceptual understanding. Meaningful learning approach was the most significant predictor and were followed by logical thinking ability, rote learning approach, and mental capacity. However, spatial visualization ability did not have the predictive power.