• Journal of the Institute of Electronics Engineers of Korea SC
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• v.47 no.2
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• pp.1-7
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• 2010

This paper presents empirical equations indicating the high frequency performance characteristics of air-cored induction coil sensors with their constructional parameters. An air-cored induction coil sensor is widely used due to good linearity at low frequency ranges but the sensor has weakness of relatively low sensitivity to the magnetic field. At high frequency ranges, the sensitivity can be dramatically increased, largely depending on the frequency of the injected field, and this property can be a great asset to some electromagnetic inspections, since they utilize the interrogating current with a fixed frequency. The application of this property of the coil sensor requires the estimation of its high frequency performance. We made experiments on the frequency responses of the coil sensors under diverse constructional conditions and, on the basis of the experimental results, the high frequency performance, such as the resonant frequency and the sensitivity at the frequency, was estimated, as a function of the constructional parameters of the coil sensor. The good agreements between experimental and estimated data were reported.

• Journal of Korean Home Economics Education Association
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• v.23 no.2
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• pp.55-69
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• 2011

This study aims at developing and evaluating the cohousing teaching/learning plan for middle and high school. The plan was developed into 5 stages such as data collection and analysis, design, development, implement, and evaluation_ It was composed of 3 lessons with various teaching materials; the concept and necessity of cohousing, spatial composition, and making a cohousing village as the main theme. The 3 home economics teachers carried out the plan for 28 classrooms (1125 students) in 2 middle and I high school, during 23th, Aug., to 17th, Sep. 2010 in Kyunggido. The high level of understanding, learning processes, interest, satisfaction with the class reported by the students showed that the plan might be adequate to both high and middle school students. The teachers carried the lessons reported the similar positive responses to the plan with some suggestions to increase teaching hours, prepare class appliances, and prepractice the teaching materials.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.18 no.6 s.121
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• pp.648-655
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• 2007

In this paper, we introduce a dual coil antenna which is useful for reducing the effects of radio frequency noise in an RFID system. A dual coil antenna is composed of two identical coils that are connected in series. The noise voltages in the two coils almost disappear when they are added because the magnitudes are equal and the polarities are opposite. The noise in an RFID reader with a dual coil antenna was 15 dB lower than that with a single coil antenna.

• KOREAN POULTRY JOURNAL
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• v.9 no.5 s.91
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• pp.52-54
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• 1977

전염성 코라이자는 헤모필러스 갈리나리엄에 의해 일어나는 전염성의 호흡기 병으로 수양성 콧물과 부종성 종장, 눈물을 흘리는 것을 주증으로 해서 이 병 자체보다는 이로 인한 만성 호흡기 병의 유발이 바로 중요한 문제가 된다.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.4
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• pp.389-396
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• 2015

A coil design of pulse induction metal detectors has been described. The search coil was demonstrated by using the wire with the diameter of 0.3 mm, 0.5 mm and 1.0 mm and the dielectric plate with the $30cm{\times}30cm$ and $35cm{\times}35cm$, the time constant and the currents of the coil as the variation of the coil size and the number of coil turns was characterized. The coil parameters like the resistance, the inductance and the time constants as the variation of the diameter of the wire, the coil size and the number of coil turns were compared and analysed through the calculation and the measurement. In addition, investigating the coil currents as the variation of the input pulse width, the coil design of pulse induction metal detectors has been discussed.

• KOREAN POULTRY JOURNAL
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• s.98
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• pp.79-80
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• 1977

• KOREAN POULTRY JOURNAL
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• s.139
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• pp.27-30
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• 1981

• Proceedings of the Korea Contents Association Conference
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• 2013.05a
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• pp.83-84
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• 2013

이 연구는 코엔 형제 영화의 열린 결말이 작품의 주제와 어떻게 연관되는지, 그리고 그러한 열린 방식으로 내러티브를 종결시킬 수 있게 하는 서사 논리가 무엇인지 논의한다. <바톤 핑크>(1991), <노인을 위한 나라는 없다>(2007), <시리어스 맨>(2009) 등 코엔 형제의 열린 결말 영화들은 모두 '불확실성'에 관한 영화이다. 이 불확실성은 부조리하고 아이러니컬한 세상의 불가해성과 그것에 대한 캐릭터의 이해 불능으로 나타난다. 코엔 형제의 영화들은 바로 이러한 세계의 불가해성에 대한 논증의 내러티브이며, 이들의 열린 결말은 플롯과 논증의 중층 구조에서 스토리 문제의 해결이 아니라 논증의 완결을 추구한 결과이다.

• Proceedings of the KIPE Conference
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• 2016.11a
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• pp.163-164
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• 2016

본 논문에서는 권선 사이의 자계결합도 변동을 고려하여 설계된 자기공진 방식의 전기차 충전용 무선전력전송회로의 효율 실험 결과를 제시한다. 특히, 동일한 시스템 사양에 대해 1차측 및 2차측에 각각 코일을 구비한 2-코일 방식의 회로와 1차측에 보조코일이 추가된 3-코일 방식의 회로를 각각 설계, 제작하였고 동등한 조건에서 두 방식의 효율을 비교하였다. 비교실험 결과 두 방식의 회로에 대한 효율이 크게 차이가 발생하지 않음을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.91-93
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• 2012

Open API는 기존 웹 서비스를 결합하여 새로운 서비스를 개발하는 최신의 방법이다. 본 논문에서는 RESTful 웹 서비스를 Open APT화 하여 그것을 이용한 모니터링 시스템 개발을 보인다. 본문의 개발 방법을 이용하는 경우 모니터링 시스템의 통합을 손쉽게 해결할 수 있으며, 차후 다른 시스템에 쉽게 결합시킬 수 있는 장점이 있다. 또한 축소된 호출 메시지 크기료 인해 서비스 제공 속도와 네트워크 대역 사용량에도 이점이 있다.