• Journal of Korean Library and Information Science Society
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• v.52 no.2
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• pp.127-144
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• 2021

The purpose of this study is to redefine the competencies of teacher librarians and to derive implications for training and re-educating teacher librarians by analyzing the priorities of competencies. A questionnaire survey targeting teacher librarians based on analytic hierarchy process has been conducted. The results indicate that in terms of the upper-level areas of competencies, it was found that they prioritized teacher librarians' competencies in the following order: information specialists, teachers, administrators, and cooperative leaders. Analysis of the lower levels of competency indicates that the priorities of the required competencies are listed in the following order: collection development, management and preservation, teaching and learning, media production, information service, library cooperative instruction, library assisted instruction, content curation. Therefore, being able to provide information resources by developing a collection of books to support the educational process in school libraries was found to be a critical competency. It seems necessary to cultivate the capacity to manage online and offline collections and produce and provide various teaching media and services by utilizing school library resources. It seems to give implications for the education of teacher librarians.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.45 no.10
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• pp.45-52
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• 2008

We investigated the design of an RF-powered, wireless temperature sensor tag chip using $0.18-{\mu}m$ CMOS technology. The transponder generates its own power supply from small incident RF signal using Schottky diodes in voltage multiplier. Ambient temperature is measured using a new low-power temperature-to-voltage converter, and an 8-bit single-slope ADC converts the measured voltage to digital data. ASK demodulator and digital control are combined to identify unique transponder (ID) sent by base station for multi-transponder applications. The measurement of the temperature sensor tag chip showed a resolution of $0.64^{\circ}C/LSB$ in the range from $20^{\circ}C$ to $100^{\circ}C$, which is suitable for environmental temperature monitoring. The chip size is $1.1{\times}0.34mm^2$, and operates at clock frequency of 100 kHz while consuming $64{\mu}W$ power. The temperature sensor required a -11 dBm RF input power, supported a conversion rate of 12.5 k-samples/sec, and a maximum error of $0.5^{\circ}C$.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.11
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• pp.738-743
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• 2018

This paper applied to the economics subject using PBL(Problem-Based Learning) for improving students many skills in Mongolian University that 21st century demands. For the first time at Mongolian University, the PBL problem was developed for the use of PBL and applied to the class and confirmed its effectiveness. The study subjects were 60 freshman students in D university who took 'Economics'. We applied 5 problems for 16 weeks. Students wrote and submitted a reflective journal when they finished the every activity. In addition, they completed a class evaluation form after the PBL program ended. The study showed that they experienced various effects such as understanding of learning contents, understanding of cooperative learning, practical experience, creative problem solving ability, presentation skill, communication ability, self- directed learning ability, self - confidence. In the PBL learning activities, the learning environment was not well prepared yet, so some difficulties were encountered. Mongolian students perceived it as a new and effective way to develop their expertise as a future leader in the 21st century. The main goal of Mongolian university is to produce leaders with professional talent with creative problem solving ability and active learning direction.