• East Asian mathematical journal
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• v.38 no.2
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• pp.187-214
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• 2022

This study compares the functions of the Learning Management Systems (LMS) in three widely used Edu-Tech platforms, that support students' individualized learning by using the learning characteristics of the students. The rapid advances in artificial intelligence (AI) are broadening their impacts in the education industry, and play a broad role in supporting student learning. In many countries, online classes have become a norm due to the COVID-19 crisis, and the demand for Edu-Tech in classes has increased rapidly. As a result, many countries, including South Korea, are now preparing and implementing various policy measures to adopt Edu-Tech in the class setting. Therefore, in this study, we analyze and compare the structures and characteristics of the three widely used Edu-Tech platforms that support individualized mathematics learning. In particular, we compare the LMSs of the three platforms by considering the elements such as learning design, learning management, learner analysis, learning result analysis, and student management functions. The results of this study give implications in the future directions to take on how to build Edu-Tech platform models that promote students' individualized mathematics learning in public education.

• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.554-557
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• 2005

Ultrafiltration has been performed to separate proteins, which is almost unique method of protein separation in mass production scale. The problems of its low selectivity and decline in permeation flux resulted from gel formation on the membrane surface have been greatly improved by an applied electric field across the membrane. The applied electric field promoted or hindered the permeation of protein through membranes depending on the electric charge of protein molecules in aqueous solution. With the effects of electric field, the permeation flux and the selectivity of the ultrafiltration could be improved significantly.

• Journal of Sensor Science and Technology
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• v.11 no.1
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• pp.39-47
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• 2002

Optical disk drives read information by replacing a laser beam on the disk track. As information has become larger, the more accurate position control of a laser beam is necessary. In this paper, we report the analysis and fabrication of the micro mirror for optical disk drivers. The mirror was fabricated by using MEMS technology. Especially, the Process using the lapping and polishing step after the bonding of the mirror and electrode plates was employed for the process reliability. The mirror size was $2.5mm{\times}3mm$ and it needed about 35V for displacement of $3.2{\mu}m$.

• Journal of the Semiconductor & Display Technology
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• v.2 no.1
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• pp.7-9
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• 2003

In order to predict the moldability of an injection molded part, a simulation of filling is needed. Short shot is one of the most frequent troubles encountered during injection molding process. The adjustment of process conditions is the most economic way to troubleshoot the problematic short shot in cost and time since the mold doesn't need to be modified at all. But it is difficult to adjust the process conditions appropriately in no times since it requires an empirical knowledge of injection molding. In this paper, the intelligent CAE system synergistically combines fuzzy-neural network(FNN) for heuristic knowledge with CAE programs for analytical knowledge. To evaluate the intelligent algorithms, a cellular phone flip has been chosen as a finite element model and filling analyses have been performed with a commercial CAE software. As the results, the intelligent CAE system drastically reduces the troubleshooting time of short shot in comparison with the expert's conventional way which is similar to the golden section search algorithm.

• The Journal of Sustainable Design and Educational Environment Research
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• v.20 no.3
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• pp.11-24
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• 2021

The purpose of this research is to investigate the current status of edu-tech trends and contents of domestic and foreign private companies in order to successfully establish the K-EDU integrated platform, analyze the connection between future teaching-learning methods and learning styles, and provide basic materials to help frontline schools easily link teaching-learning methods to the most suitable contents per subject. To this end, a literature survey and on-site interviews with officials from companies participating in the 2021 Education Fair provided results of investigating 116 edu-tech contents produced by a total of 68 companies, including 22 overseas (28 contents) and 46 domestic (88 contents) ones, on whether they mutually match future teaching-learning methods and learning styles.

• 한국생물공학회:학술대회논문집
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• 2003.10a
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• pp.630-633
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• 2003

The mussel adhesive protein Mefp-1 is a natural, strong and durable adhesive that is stable under corrosive, saline conditions. Mefp-1 is found in the marine mussel Mytilus edulis and it has a molecular weight of ca. 130,000. The primary structure is mainly composed of repeating decapetides: Ala-Lys-Pro -Ser-Tyr Hyp-Hyp-Thr-DOPA-Lys. To elucidate the mechanism by which Mefp-1 bonds to metal surfaces, we have used surface-enhanced Raman spectroscopy to study the interactions of peptides related to the Mefp-1 decapeptide repeat with gold surfaces. We have concluded that the tyrosine residue and the carboxyl terminus interact strongly with the gold surface, and that proline and hydroxyproline constrain the conformations of the peptides, thereby limiting the types of possible interactions of the functional groups with the gold surface.

• Communications of Mathematical Education
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• v.36 no.1
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• pp.1-21
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• 2022

The purpose of this study is to analyze the current situation of EduTech, which is proposed as a way to build a flexible learning environment regardless of time and place according to the use of digital technology in mathematics subjects. The process of designing classes to use the EduTech platform, which is still in the development introduction stage, in public education is still difficult, and research to observe its effects and characteristics is also in its early stages. However, in the stage of preparing for future education, it is a meaningful process to grasp the current situation and point out the direction in preparation for the future in which EduTech will be actively applied to education. Accordingly, the current situation and utilization trends of EduTech at home and abroad were confirmed, and the functions and roles of EduTech platforms used in mathematics were analyzed. As a result of the analysis, the EduTech platform was pursuing learners' self-directed learning by constructing its functions so that they could be useful for individual learning of learners in hierarchical mathematics education. In addition, we have confirmed that the platform is evolving to be useful for teachers' work reduction, suitable activities, and evaluations learning management. Therefore, it is necessary to implement instructional design and individual customized learning support measures for students that can efficiently utilize these platforms in the future.

• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.707-710
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• 2005

The antimicrobial activities of extracts from some of natural products and bacteriocins produced from lactic acid bacteria such as L. mesenteroides, L. citreum and P. pentosaceus have been investigated with using disc diffusion assay, challenge method and minimum inhibitory concentration method. The bacteriocin substances produced from L. mesenteroides, L. citreum and P, pentosaceus have shown strong antimicrobial activities against E. coli, S. aureus, P. aerugionosa, and B. subtillis while the extracts from phenonip and sandal wood have shown strong antimicrobial activities only against C. albicans. The bacteriocins produced from L. mesenteroides, L. citreum and P. pentosaceus could be a promising preservatives for cosmetics, pharmaceutical products and foods in future.

• Journal of Digital Convergence
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• v.14 no.3
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• pp.55-62
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• 2016

Today, demand for job training of married immigrants is increasing. This research aims to propose developmental Edu-Tech based on the demand for education contents and the characteristics of multicultural family. Based on analysis such as FGI(focus group interview) and expert interview, this paper presents a four methods for development of EduTech for multicultural people, such as language skills, the recommendation technology of customized training contents, contents design based on gamification and user experience design. This research contributes to the direction of the method to use EduTech as a tool for gaps in education and welfare state.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.570-571
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• 2006

The mixed atomized iron powders with 0.3% graphite and 1% Ni powders were cold pressed and sintered at $1200^{\circ}C$ for 30 min under pure Ar gas atmosphere. Some of the sintered specimens were intercritically annealed at $760^{\circ}C$ and quenched in water (single quenching). The other sintered specimens were first fully austenized at $890^{\circ}C$ and water quenched. These specimens were then intercritically annealed at $760^{\circ}C$ and re-quenched in water. The experimental results showed that the wear coefficient effectively decreased in the double quenched specimen.