• 한국수학교육학회지시리즈C:초등수학교육
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• 제25권2호
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• pp.161-178
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• 2022

우리나라는 고유어 수사와 한자어 수사로 구성된 이중 수사 체계를 사용하고 있다. 이러한 이중 수사 체계는 실생활에서 관습적으로 특정 방식이 선택되거나, 두 가지 방식이 혼용되기도 하고, 불규칙하게 변형되기에 수사 학습지도 과정에서 학생과 교사 양측의 부담이 가중된다. 이에 본 연구는 이중 수사 체계로 인한 학습 지도 난점 개선의 필요성을 인지하였다. 이를 위하여 수사 체계 방식이 선택되는 맥락과 다양한 변형 사례, 현행 교육과정과 교과서의 관련 지도 내용을 분석·정리하였다. 분석 결과, 수사를 사용하는 실제 상황에 따라 나타나는 수사 체계 방식의 선택 및 변형의 특징이 존재하였으나 그러한 특징의 기준이 모호하고 교육과정 및 교과서 내 구체적인 지도 지침 또한 부재하였다. 이 경우 현장 교사의 역할이 더욱 중시되기 때문에 교사는 이중 수사 체계 관련 실제 상황의 세부 특징을 인지하고 학생에게는 이중 수사 체계 사용의 다양한 측면에 대한 경험과 연습을 통하여 이해하게 만듦으로써 수사 체계 교수·학습 개선을 위한 방향을 논의하였다.

• Journal of Power Electronics
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• 제16권1호
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• pp.111-120
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• 2016

Generally, a single phase H-bridge converter feeding a single primary track is employed in conventional inductive power transfer systems. However, these systems may not be suitable for some high power applications due to the constraints of the semiconductor switches and the cost. To resolve this problem, a novel dual coupled primary tracks IPT system consisting of two high frequency resonant inverters feeding the tracks is presented in this paper. The primary tracks are wound around an E-shape ferrite core in parallel which enhances the magnetic flux around the tracks. The mutual inductance of the coupled tracks is utilized to achieve adjustable power sharing between the inverters by configuring the additional resonant capacitors. The total transfer power can be continuously regulated by altering the pulse width of the inverters' output voltage with the phase shift control approach. In addition, the system's efficiency and the control strategy are provided to analyze the characteristic of the proposed IPT system. An experimental setup with total power of 1.4kW is employed to verify the proposed system under power ratios of 1:1 and 1:2 with a transfer efficiency up to 88.7%. The results verify the performance of the proposed system.

• 대한가정학회지
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• 제36권4호
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• pp.147-162
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• 1998

This study constructed a family life education program designed to help dual-earner couples reduce their role strain. This program is consisted of 6 sessions aiming for understanding the multidimensional affecting factors of role strain, strengthening family system, sharing the housework, managing time effectively reducing the additional role and adjusing standard, maintaining desirable attitude on work and family. We expect this program to be helpful in reducing dual-earner families' role strain and the active using of role strain coping strategies.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제20권2호
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• pp.129-136
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• 2013

We research properties of ternary numbers with values in ${\Lambda}(2)$. Also, we represent dual ternary numbers in the sense of Clifford algebras of real six dimensional spaces. We give generation theorems in dual ternary number systems in view of Clifford analysis, and obtain Cauchy theorems with respect to dual ternary numbers.

• 제어로봇시스템학회논문지
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• 제18권7호
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• pp.650-657
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• 2012

An effective dual-mode camera system(a passive wide-angle camera and a pan-tilt-zoom camera) is proposed in order to improve the performance of visual surveillance. The fixed wide-angle camera is used to monitor large open areas, but the moving objects on the images are too small to view in detail. And, the PTZ camera is capable of increasing the monitoring area and enhancing the image quality by tracking and zooming in on a specific moving target. However, its FOV (Field of View) is limited when zooming in on a specific target. Therefore, the cooperation of wide-angle and PTZ cameras is complementary. In this paper, we propose an automatic initial set-up algorithm and coordinate transform method from the wide-angle camera coordinate to the PTZ one, which are necessary to achieve the cooperation. The automatic initial set-up algorithm is able to synchronize the views of two cameras. When a moving object appears on the image plane of a wide-angle camera after the initial set-up positioning, the obtained values of the wide-angle camera should be transformed to the PTZ values based on the coordinate transform method. We also develope the PTZ control method. Various in-door and out-door experiments show that the proposed dual-camera system is feasible for the effective visual surveillance.

• 한국수학교육학회지시리즈A:수학교육
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• 제19권2호
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• pp.33-37
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• 1981

• 실천공학교육논문지
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• 제11권2호
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• pp.181-193
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• 2019

기업현장교사는 회사 내 일학습병행에 참여하고 있는 도제 및 고숙련 학습근로자에게 고도화된 훈련 지도 및 평가자로서의 역할을 수행하므로 심화된 이론과 기술, 풍부한 경험과 문제해결 능력이 요구된다. 본 연구는 양질의 기업현장교사 양성을 위한 한국의 학위연계형 고숙련마이스터 과정을 소개하고, 최적화된 표준 교과 모델을 제시하였다. 이는 고숙련마이스터 양성과 관련된 최초의 실증적 연구로서, 일학습병행제 고숙련마이스터 양성에 기여함은 물론 안정적인 고숙련마이스터 과정의 제도적 정착 및 활성화에 크게 기여할 것으로 사료된다.

• 동의생리병리학회지
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• 제28권1호
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• pp.9-15
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• 2014

Recently, interest in traditional medicine has increased steadily. Nations having traditional medicine system have been attempting to change it institutionally for the purpose of public application boost in use of traditional medicine. But there are not too many countries which have established the modern system of education and licensing system for traditional medicine with it maintained as a part of a national health care system. The best known examples of nations utilizing traditional medicine are the People's Republic of China, Republic of Korea, Japan, and Taiwan. These countries follow different patterns in the relationship with western medicine according to different social and historical backgrounds. Taiwan has dual medical system as Korean. In this study, we looked through history and the current state of affairs of national health care system in Taiwan, and also found out the licensing system, the educational system, and the curriculum in several universities. thoroughly. Furthermore, we looked into the direction of the policy of Taiwanese health care system which has been becoming an integrated medical system between traditional Chinese medicine and western medicine. With findings based on this study, we deduced implications of a future policy line about the integrated medical system in Korea to minimize conflicts between the concerned parties.

• 수산해양기술연구
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• 제41권3호
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• pp.207-212
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• 2005

Dual frequency acoustic pinger(AP) was manufactured to reduce study effect by long-term use of developed single frequency AP to prevent cetacean bycatch. Directivity characteristic of transducer was the omnidirectional pattern which showed less than ${\pm}3dB$ the change range of sensitivity on the beam pattern of right and left. Source power level(SPL) was 1384311pa with epoxy window before casing however after casing 1170B11Pa at sea. Dual frequency Af was tested to identify the avoidance behavior of bottlenose dolphin by its working. However the efficiency of dual frequency AP about the study effect was verified experiment repeatedly using single and dual frequency AP.

• 한국지열·수열에너지학회논문집
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• 제17권2호
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• pp.30-41
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• 2021

This paper presents the heating performance analysis results of a heat pump system using a dual heat source. In this paper, a dual heat source refers to the ground-coupled heat exchanger using both a surface water heat exchanger (SWHE) and a vertical ground heat exchanger (VGHE). In order to evaluate the system performance, we installed a monitoring system to measure the temperature and power consumption of a heat pump and then collected operation data with 4 different load burdened ratios of the dual heat source heat exchanger. During the whole measurement period, the average heating capacity of a water-to-water heat pump unit was 37.3 kW. In addition, the compressor of the heat pump consumed 9.4 kW of power, while the circulating pump of the dual heat source heat exchanger used 6.7 kW of power. Therefore the average heating coefficient of performance (COP) for the heat pump unit was 4.0, while the entire system including the circulating pump was 2.7. Finally, the parallel use of SWHE and VGHE was beneficial to the system performance; however, further researches are needed to optimize the design data for various load ratios of the dual heat source heat exchanger.