• Journal of The Korean Association of Information Education
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• v.14 no.1
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• pp.99-110
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• 2010

In order to adapt learners' individual differences in learning ability, individual learning and level-learning have been recommended. However, instructing each student accordingly is not easy issue. In this paper, an online learning support system based on Keller's Personalized System of Instruction theory is developed. As a class-based system, it supports teachers and students to conveniently conduct frequent formative evaluations. It enables students to study at their own learning pace and to reach their learning goals. And it adopts point system and level system to induce self-directed participation. Our implementation results confirm teachers can conduct formative evaluations efficiently.

• The Journal of Korean Association of Computer Education
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• v.5 no.1
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• pp.85-98
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• 2002

In this study, We are developed learner traits analysis and profile management software modules to develop learnable courseware fits to learner's individual traits in cyber learning system. We specified learner's personal information, performance information, preference information and portfolio information as learner's traits variables in this study, these four types of information are managed in learner profile management DB based on elaborate analysis to learner's traits. And we consists of curriculum sequencing module using high and low level sequencing technology, these are used in organizing learning contents sequencing with learning topic and specific learning task. The advice algorithm module developed based on adaptive navigational support and rule based technology. This Result of Research are able to be used for develop learnable courseware fits to learner's individual traits in cyber learning systems.

• Journal of Sericultural and Entomological Science
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• v.46 no.1
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• pp.28-31
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• 2004

Bombyx mori silk fibroin/hyaluronic acid blend films were prepared by mixing aqueous solution of B. mori silk fibroin and hyaluronic acid. According to the FTIR spectra, no interaction between silk fibroin and hyaluronic acid was found. The conformation of silk fibroin in blend films was changed from random coil to $\beta$-sheet structure by treatment of EDC ethanol solution. Thermal degradation peak of silk fibroin and hyaluronic acid was also not altered by blending each other. The average swelling ratio of silk fibroin/hyaluronic acid blend films was 70. Therefore, silk fibroin/hyaluronic acid blend films might be one of possible wound dressing materials.

• Elastomers and Composites
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• v.47 no.4
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• pp.282-291
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• 2012

Control of shape/volume, mechanical, optical, electrical, and chemical switching of materials by external stimuli such as light, temperature, pH, electric field, and pressure has attracted great attention. Among these materials, photo-responsive materials containing photochromic compounds such as azobenzene, spiropyran, and cinnamic acid groups have been the subject of intense interest in recent years. In this review, we describe the recent progress in the area of azobenzene containing polymer materials that can convert light energy into mechanical energy directly. Especially we focus our attention on light-driven actuators such as artificial muscle, motor, and valve. We summarize the photomechanical effects in liquid crystal elastomer, amorphous polymer, monolayer, and supramolecules containing azobenzene, respectively.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.109-119
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• 2017

The purpose of this study was to examine the factors influencing on the oral management ability of Vietnam marriage migrant women. The subjects of the study were extracted at randomly selected with the cooperation of the Vietnamese people 's association in D metropolitan city and the public health center in C city. The data were gathered using structured questionnaires translated into Vietnamese and oral examination, collected 85. The data was collected from June, 2016 to February, 2017. Vietnam marriage migrant women's oral management ability were found to have statistically significant difference according to staying in korea, tooth brushing frequency and experiences of oral health education. Also, as a result of path analysis, self-esteem was affected on oral management ability.

• Journal of the Korea Convergence Society
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• v.9 no.3
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• pp.173-179
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• 2018

The purpose of this study was to explore college students' use of learning strategies in a flipped learning class, and to examine the students' use of learning strategies in relation to their achievement levels. The participants were 33 college students who took an introduction to English education course. The study used three data collection procedures: (1) students' performance score; (2) a pre-and post-survey of student learning strategies; (3) a survey of student perception towards the flipped learning experience. Data were analyzed by using paired samples t-test and ANOVA. Results showed that the students used different learning strategies in the beginning and the end of the course, depending on their achievement levels. In particular, significant differences were found among three groups in terms of time management, concentration, selecting main idea, self-testing, and test strategies. The result indicates that learning strategies can be effectively trained and developed in the flipped learning environment with the consideration of students' levels.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.1
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• pp.187-192
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• 2015

Underwater acoustic communication channels have very complex channel characteristics caused by time-varying sea surface, submarine topography, sound speed, and geometry between transmitter and receiver. Especially, the channel has time-variance and doppler effect due to wind and sea current. We have to recognize the channel state and apply it to communication technique for increasing transmission efficiency in the underwater acoustic channel. In this paper, we present the frame recursive modulation and demodulation method using ambiguity function and autocorrelation function to estimate the doppler frequency. Furthermore, we conducted the simulation and sea experiment to evaluate the performance of the proposed method. When the channel coding technique was not used, the bit error rate performance of the proposed method was improved about 32 % compared with conventional method.

• Journal of Korea Game Society
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• v.13 no.2
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• pp.17-28
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• 2013

The development of technology has enabled users to customize avatars using various combinations and appearances in MMORPG. This study investigated the loyalty and user immersion factors of MMORPG avatar customization, which included personal factors (self-esteem, self-efficacy) and environmental factors (challenging spirit, sense of unity). immersion factors were extracted and a research model was established by observing precedent studies conducted on Flow theory and on the development and transformation of avatars. This study established a theory based on a developed research model and by surveying the users of AION, a MMORPG game, who actively enjoyed avatar customization, after determining measurement items based on precedent studies. The research results showed that self-esteem, a challenging spirit and sense of unity must be enhanced to increase the customization immersion. In addition, research results showed that the degree of loyalty increased with higher customization immersion.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.6
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• pp.1613-1624
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• 2007

First impression is flexible that in a relationship it can be decided within four to ten seconds Therefore, to change the fixed image that has been formed at first impression requires lots of time and effect. Forming Rapo is one of a very important element in customer managing that form curiosity and credibility at first sight. This thesis is researched on Forming Rapo, which is important due to demand of change in business environment, to apply in the real market and increase the sale. The study applied on Enneagram that is proven to be the most effective tool for teach required passion and leadership within human personality system, and it explains nine different type of human personality. The used methodology was to set the hypothesis from selecting features that can be judged to apply on the sales field in the nine different type of personality. In addition, to support and prove the appliance of the hypothesis, one conduct the survey to 375 people, who found their personality type at KESI (Korea Enneagram Spiritual Institution).

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.6
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• pp.1830-1837
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• 2008

The growth of an information and knowledge based society has changed the base of education from institution-based to a learner-based system. This indicates that the educational purpose and individual characters of the learners are the primary factors for the educational success. In the information and knowledge based society, the Cyber University is a representative example of the new educational paradigm with its online communities, multi-media based education and communication among the learners. The sample of study was 1620 students of a leading cyber university in Seoul, Korea. One of the results in this study showed that satisfaction levels of learning and education do not have significant relationship with age or employment. Rather the lowering level of satisfaction after sufficient adaptation period of cyber education was raised as rising problem.