• Steel and Composite Structures
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• v.44 no.6
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• pp.899-912
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• 2022

To study the seismic performance of the all-steel buckling-restrained brace (BRB) using the novel soft steel LY315 for core member, a total of three identical BRBs were designed and a series of experimental and numerical studies were conducted. First, monotonic and cyclic loading tests were carried out to obtain the mechanical properties of LY315 steel. In addition, the parameters of the Chaboche model were calibrated based on the test results and then verified using ABAQUS. Second, three BRB specimens were tested under cyclic loads to investigate the seismic performance. The failure modes of all the specimens were identified and discussed. The test results indicate that the BRBs exhibit excellent energy dissipation capacity, good ductility, and excellent low-cycle fatigue performance. Then, a finite element (FE) model was established and verified with the test results. Furthermore, a parametric study was performed to further investigate the effects of gap size, restraining ratio, slenderness ratio of the yielding segment, and material properties of the core member on the load capacity and energy dissipation capacity of BRBs.

• Computers and Concrete
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• v.33 no.1
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• pp.91-102
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• 2024

Beam-shaped components commonly rotate along a fixed axis when massive mechanical structures like rotors, jet engine blades, motor turbines, and rotating railway crossings perform their functions. For these structures to be useful in real life, their mechanical behavior is essential. Therefore, this is the first article to use the modified shear deformation theory type hyperbolic sine functions theory and the FEM to study the static bending response of rotating functionally graded GPL-reinforced composite (FG-GPLRC) beams with initial geometrical deficiencies in thermal media. Graphene platelets (GPLs) in three different configurations are woven into the beam's composition to increase its strength. By comparing the numerical results with those of previously published studies, we can assess the robustness of the theory and mechanical model employed in this study. Parameter studies are performed to determine the effect of various geometric and physical variables, such as rotation speed and temperature, on the bending reactions of structures.

• Journal of Korean Elementary Science Education
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• v.34 no.1
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• pp.142-152
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• 2015

The purpose of this study was to identify the differences in eye movement pattern shown in shown in classification process between the scientifically gifted and general students in elementary schools. The subjects for the research consisted of 16 gifted students in special education center for the gifted at Seoul National University of Education and 22 general students at G elementary schools. The tasks consisted of four hierarchical biology classification tasks and one non-hierarchical tasks. SMI's Eye Tracker (iView $X^{TM}$ RED) was used to collect eye movement data while the Begaze software analyzed the task performing process and eye movements. The findings of this study were twofold. First, there was a significant difference in students' fixation duration by students' academic achievement level. Gifted students spent little time on scanning details and found the features successfully. Second, the process of the classification is different by students' academic achievement. General students spent more time to gaze the salient features not relevant features. They had a difficulty to find the element to classify.

• International Journal of Advanced Culture Technology
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• v.5 no.2
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• pp.26-43
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• 2017

This study investigated the effects of TBL nursing education(for the care of congestive heart failure patients) on self identity and self efficacy among nursing students. A one-group, pre-post design was utilized with 28 nursing students as the participants. The scenario of TBL nursing education was created based on PBL, and consisted of four states(1) Present a problem, (2) Problem Follow-Up Steps,(3) Present the results including presentation, and(4) Problem Conclusion and after resolution. And then In-depth interviews were conducted with volunteers on program experiences. The data were analyzed using descriptive statistics, Pearson's correlation coefficients and paired t-tests and Giorgi phenomenology analysis method was performed. The TBL program was effective in self - efficacy and self - identity (p<0.01) increased significantly after the education intervention and The meaning of the TBL experience is four (meaning that the learners embarrassed TBL, aggressive learning attitude change, effective collaboration for problem solving in a free learning environment, university classes imagined in high school), and 67 sub-components appeared as an element. The TBL program is an effective teaching method for nursing education and it can be used as basic data for the development of nursing education based on this research.

• Journal of Digital Contents Society
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• v.16 no.1
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• pp.53-61
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• 2015

Recently a demand for student-centered creative design education is rapidly growing, but well organized design curriculum and design practice complex are not established properly in most universities. In this paper, we present a scheme for design-centered engineering curriculum and a method to build a design practice complex for creative design education which it is currently attracting a lot of interest in engineering education. Based on the analysis of the conventional curriculum of electronic engineering, a new curriculum and a design practice complex that is suitable for enhancement of professional practice capability and by which an effective engineering education through introductory design, element design and advanced design steps can be performed is described.

• Korean Institute of Interior Design Journal
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• v.26 no.6
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• pp.24-32
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• 2017

STEAM education is an effective teaching method to develop self-problem-solving skills through creative thinking. In order to revitalize STEAM education, various program models are being developed recently. The purpose of this study is to develop a STEAM education program based on the project-based learing method that includes the process of solving global environmental problems. The STEAM element was extracted by linking the zero energy house design with the middle school curriculum, and the STEAM education program was developed considering career activities. It was analyzed whether the developed program can improve STEAM core competence and job preparation ability. The education program was conducted for middle school students and the program was evaluated through questionnaires. In order to strengthen the STEAM competency, project-based learning method was applied and it was able to enhance the active problem solving ability of learners. In addition, opportunities for career experience could be provided through career exploration programs and various activities. Through this STEAM education program, it is expected to contribute to cultivating human resources with convergence knowledge and core competency.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.19 no.1
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• pp.19-36
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• 2008

The advantage of ontology leads a new knowledge system through integrating existing knowledge system and descriptive element of the concept. This study based on the advantage of ontology, providing a modeling education ontology that considered educational circumstances and related objects-person, organization, educational resources and so forth. Therefore, this study developed the framework for education ontology that provided link between school library and MLA to practice teaching-learning activity, these characteristics of educational ontology were as follows : the first, utilizing the existing education metadata and ontology, the second, representing a concept of educational ontology, subsequently defining classes and properties of education domain, the third, adding new classes and properties to connect existing classes and properties.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.6
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• pp.231-244
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• 2014

Domestic recessions, business restructurings, voluntary resignations and youth unemployment crises have fueled competition in the start-up market, and business start-up is increasingly incited as a means to make a living under circumstances. However, ill-prepared business start-ups result in bankruptcy. Profound knowledge and skills are required for successful start-up. A successful entrepreneur of a business is often not born but made. The purpose of this study was to examine the success factors of successful venture entrepreneurs in an effort to make some suggestions on entrepreneurship education. After the characteristics of the selected successful venture entrepreneurs were analyzed, 18 items were selected as their success factors, and the following six things were presented as what should be taken into account in relation to the competency of a successful entrepreneur: First, achievement-needs characteristics and goal-oriented characteristics that belong to the characteristics of entrepreneurs could be educationally taken advantage of in entrepreneurship education. Second, achievement-needs characteristics are an educational element of the preparatory stage, and goal-oriented characteristics are an educational element for business administration after starting a business. Third, hands-on experience is mandatory since learning by experience is quite important for entrepreneurs. Fourth, entrepreneurship education is more effective when it targets the younger generations. Fifth, the kind of educational support that is to assess the entrepreneurship of prospective entrepreneurs to help them improve their overall entrepreneurship is required. Finally, entrepreneurship education should be offered by a person with experience of setting up a business so that he or she could inform learners of their practical experience and knowhow.

• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.375-382
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• 2021

Adolescents with disabilities have unnatural behavior and language, which makes it difficult to use soft and flexible language and behavior, and lack of learning experience has limitations in not being free in mature behavioral communication. Eurhythmics musical rhythm elements were divided into time and space, power and weight, and balance and fluidity and reflected in teaching and learning so that adolescents with disabilities could have comfortable, creative, and original thoughts that bring about changes in thawing. In order to increase the effectiveness of education in the direction of observing the effect of improving self-esteem, communication, and creativity of adolescents with disabilities, the study guide applying the Eurhythmics rhythm element was fused with music education, art education, and physical education, and interviewed by selecting research participants. Based on the questionnaire, an observation method suitable for the study of adolescents with disabilities was conducted. As a result of the study, it was observed that the educational effect of the disabled youth was improved as a result of conducting the class by applying the Eurhythmics rhythm elements time and space, force and weight, balance and fluidity by integrating music, art, and physical education(line dance, playtime). Therefore, to supplement the limitations in this learning process, various educational methods applicable to the education of youth with disabilities, a support system that can reflect Eurhythmics education through physical play, and a method to properly compose various learning tools do.

• Clinics in Shoulder and Elbow
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• v.18 no.3
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• pp.152-158
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• 2015

Background: Acromioclavicular (AC) stability is maintained through a complex combination of soft-tissue restraints that include coracoclavicular (CC), AC ligament and overlying muscles. Among these structures, the role of the CC ligament has continued to be studied because of its importance on shoulder kinematics, especially after AC injury. This study was designed to determine the geometric change of conoid and trapezoid ligaments and resulting stresses on these ligaments according to various scapular motions. Methods: The scapuloclavicular (SC) complex was isolated from a fresh-frozen cadaver by removing all soft tissues except the AC and CC ligaments. The anatomically aligned SC complex was then scanned with a high-resolution computed tomography scanner into 0.6- mm slices. The Finite element model of the SC complex was obtained and used for calculating the stress on different parts of the CC ligaments with simulated movements of the scapula. Results: Average stress on the conoid ligament during anterior tilt, internal rotation, and scapular protraction was higher, whereas the stress on the trapezoid ligament was more prominent during posterior tilt, external rotation, and retraction. Conclusions: We conclude that CC ligament plays an integral role in regulating horizontal SC motion as well as complex motions indicated by increased stress over the ligament with an incremental scapular position change. The conoid ligament is the key structure restraining scapular protraction that might occur in high-grade AC dislocation. Hence in CC ligament reconstructions involving only single bundle, every attempt must be made to reconstruct conoid part of CC ligament as anatomically as possible.