• Steel and Composite Structures
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• v.42 no.5
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• pp.685-697
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• 2022

In this paper, a vibration-based method using the change ratios of modal data and the experience-based learning algorithm is presented for quantifying the position, size, and interface layer of delamination in laminated composites. Three types of objective functions are examined and compared, including the ones using frequency changes only, mode shape changes only, and their combination. A fine three-dimensional FE model with constraint equations is utilized to extract modal data. A series of numerical experiments is carried out on an eight-layer quasi-isotropic symmetric (0/-45/45/90)s composited beam for investigating the influence of the objective function, the number of modal data, the noise level, and the optimization algorithms. Numerical results confirm that the frequency-and-mode-shape-changes-based technique yields excellent results in all the three delamination variables of the composites and the addition of mode shape information greatly improves the accuracy of interface layer prediction. Moreover, the EBL outperforms the other three state-of-the-art optimization algorithms for vibration-based delamination detection of composites. A laboratory test on six CFRP beams validates the frequency-and-mode-shape-changes-based technique and confirms again its superiority for delamination detection of composites.

• The Journal of Korean Academic Society of Nursing Education
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• v.15 no.2
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• pp.159-165
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• 2009

Purpose: The purpose of this study was to identify clinical competence and to analyze influencing factors on clinical competence for second year college nursing students. Methods: The data were collected from 183 students by means of self reported questionnaires with clinical competence, satisfaction of clinical practice experience, critical thinking disposition, and self-directed learning, on June 18th 2007 and June 25th 2008. Results: The influencing factors on clinical competence of nursing students were satisfaction of clinical practice experience and critical thinking disposition. The more adaptable a student's major was, the higher the clinical competence and satisfaction of clinical practice experience. The score of self-directed learning was the highest in the well adapted group of a major. For clinical competence categories, the level of basic nursing was the highest followed by psychosocial nursing, patient education, nursing process, monitoring and patient physical assessment. The level of direct nursing care was the lowest among nursing students. Conclusion: In conclusion, results of this study suggest that constructing a cooperative system between colleges and educational hospitals, intensifying preceptors' and professors' clinical instruction, and developing a multimedia learning module and practice using simulators or standardized patient care is necessary to promote clinical competence of nursing students.

• The Journal of Korean Academic Society of Nursing Education
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• v.9 no.2
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• pp.310-319
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• 2003

The purpose of this study was to determine what effect reflection on clinical practice experience had students as learners and care providers. Qualitative research method was used to study a group of four-year undergraduate nursing course. Content analysis was done using the classification method of Carper's four patterns of knowing. Results of the study indicated that the use of the reflective process of clinical debriefing and journaling was impact on the aspect of nursing science, moral component of knowledge in nursing, personal knowing in nursing and the art of nursing. Especially, students moved from a passive to a more active mode of learning. The most significant finding was that over time, reflective processes resulted in the emergence of the client as the central focus of care. It was suggested that reflection was an important learning tool in professional education and that the skills required for reflection need to be developed in professional courses.

• Journal of Korean society of Dental Hygiene
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• v.18 no.5
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• pp.729-740
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• 2018

Objectives: The purpose of this study was to investigate the factors affecting robot utilization in the education of pre-dental hygienists. Methods: A self-reported questionnaire was completed by 238 dental hygiene students studying in the Daejeon, Chungcheong, and Jeolla provinces during the period March 1-31, 2017. Results: Future oral health education media had high selection of 'movies,' 'video,' '3D printer,' 'robot,' and 'drone' In general education and oral health education, robots were appropriate as educators, assistant teachers, and media. This group had high levels of interest, experience, attitude, and learning scope of robots. Robot utilization education showed a significant positive correlation with the 'interest,' 'experience,' 'attitude,' and 'learning' subfactors (p<0.01). Factors influencing robot utilization education were the relationships among actual experience of robot, learning of robot production, social influence of robot, emotional exchange with robot, and the predictive power was 25.5% (p<0.05). Conclusions: Oral health education curricula using robots should be developed considering the emotional exchange and social influence between educator and learner.

• Educational Technology International
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• v.6 no.2
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• pp.113-130
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• 2005

The purpose of this study was to determine the teaching styles of professors who teach adult students in selected higher institutions. It also identified whether professors' teaching styles were teacher-centered or learner-centered and examined the relationship between instructors' teaching styles and such instructor demographic variables as gender, years of teaching experience, and taught level of courses. This study used The Principles of Adult Learning Scale(PALS) (Conti,1983) to measure instructional preferences. Demographic characteristics were collected through a personal data inventory. The analysis of variance (ANOVA) and multivariate analysis of variance (MANOVA) tests were used to analyze the data. The data were examined for significance at the .05 level of confidence by means of analysis of variance. The dependent variables in this study were teaching styles of full-time professor, as represented by the seven subscores from the standardized instrument on the PALS. The seven subscores were: (1) learner-centered activities, (2) personalizing instruction, (3) relating to experience, (4) assessing student needs, (5) climate building, (6) participation in the learning process, and (7) flexibility for personal development. The study established that there was a significant difference in mean scores on the PALS between participants when examined by the number of years of teaching experiences.

• Journal of Educational Research in Mathematics
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• v.22 no.1
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• pp.69-99
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• 2012

This study aims to develop a highly-reliable inventory for measuring and analyzing the positive psychological experience in math learning. A measurement result provides meaningful information on the strength of students. Elements of positive psychological experience in math learning were extracted by the extensive research on the literature. The result was verified through the open survey. Through this process, the first preliminary questionnaire of 106 items was released, and was revised into the second one of 66 items through a continuous investigation on reliability and validity. Finally, a measurement inventory with 65 questions for testing 'positive psychological experience in math learning' was established.

• Journal of Energy Engineering
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• v.15 no.4 s.48
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• pp.209-228
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• 2006

The learning effect is one of the theoretical frameworks that examine the mechanisms of the deployment of energy technologies. The objective of this paper is to provide a theoretical overview and a critical analysis of the literature on the experience curve for energy technology. For these objectives, we review a couple of theoretical aspects and applications and investigate the sources of learning and cost reductions to grasp the mechanisms of teaming effect. Finally we conclude some insights from our theoretical reviews.

• Research in Mathematical Education
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• v.18 no.2
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• pp.129-148
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• 2014

In this study, we examined the relationships among years of teaching experience, professional rank, number of courses taken, and knowledge of algebra for teaching (KAT). 338 in-service and 376 pre-service secondary mathematics teachers in China completed a KAT questionnaire. Various statistical techniques were employed to examine these relationships. The pre-service participants teachers performed statistically significantly higher in advanced mathematics knowledge than their in-service counterparts. Among the inservice teachers, senior teachers had scored higher in school mathematics and teaching mathematics, compared with junior teachers. Yet participants' advanced mathematics knowledge decreased as their professional rank advanced or their teaching experience increased. The number of courses taken has significantly positive correlation with school mathematics knowledge and advanced mathematics knowledge. The implications of these findings for mathematics teacher education are discussed.

• The Journal of Korean Academic Society of Nursing Education
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• v.23 no.3
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• pp.279-289
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• 2017

Purpose: The purpose of this study is to investigate the learning experience, self-directed learning ability and self-efficacy of Japanese nursing students undergoing portfolio-based clinical practicums. Methods: The self-directed learning ability and self-efficacy of nursing students were examined using two scales. And using a text-mining approach, we constructed correspondence analysis followed by cluster analysis of open-ended responses forms. Results: The mean score of the self-directed learning ability was $60.89{\pm}5.28$ and the generalized self-efficacy was $68.37{\pm}11.56$. Moreover, the scores in the self-directed learning ability were positively correlated with scores in the generalized self-efficacy. In correspondence analysis, the distribution of extracted words showed that record was located on the negative side of the third quadrant, to the first principal component and that patient was located on the positive side of the first quadrant, contributing greatly to the second principal component. Conclusion: The results of this study contribute to approaching to "confidence, pride, stability," "growth and intention to development'' offers a key in developing self-directed learning ability. Students record what they see and learn the importance of visualizing it in learning portfolios. "Expression in detail of the learned contents" and "concerning to which objective evaluation is suggested" are important to the students.

• Journal of the Korea Society of Computer and Information
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• v.21 no.3
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• pp.97-104
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• 2016

In this paper, we propose spatial information based simulator for user experience optimization and minimize real space complexity. We focus on developing simulator how to design virtual space model and to implement virtual character using real space data. Especially, we use expanded events-driven inference model for SVM based on machine learning. Our simulator is capable of feature selection by k-fold cross validation method for optimization of data learning. This strategy efficiently throughput of executing inference of user behavior feature by virtual space model. Thus, we aim to develop the user experience optimization system for people to facilitate mapping as the first step toward to daily life data inference. Methodologically, we focus on user behavior and space modeling for implement virtual space.