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ICT 활용과 자기 주도적 학습력 신장을 위한 사회과 교수-학습 시스템 개발
최용훈,황선영,고병오,Choi, Yong-Hun,Hwang, Sun-Young,Goh, Byung-Oh 한국정보교육학회 2003 정보교육학회논문지 Vol.7 No.2
웹을 활용한 다양한 수업전략으로 정보의 수집을 통하여 지식을 구성하고 학습의 효율성을 높이는 개별학습과 타인과의 의사교환을 통해 책임감과 문제 해결력을 기를 수 있는 협동학습이 활발히 개발되고 있다. 그러나 현재 개발되어 있는 개별학습자료는 대부분 자료의 제시형태로 학습이 진행되어 학습자의 흥미를 유발하고, 문제에 대한 호기심을 자극하기에 적합하지 않다. 또한 협동학습자료는 현장의 교육과정과 연계성이 부족하여 수업 현장에서 적용이 어려운 실정이다. 따라서 본 연구에서는 다양한 사고력을 신장시킬 수 있도록 흥미있는 조작활동 위주의 자기주도적 학습을 적용하였다. 또한 의사 결정력과 ICT 활용능력을 향상시킬 수 있는 온라인 프로젝트학습을 함께 연계하여 운영이 가능하도록 사회과 교수-학습 시스템을 개발하였다. 본 시스템은 다양한 수업환경에 맞춰 융통성있는 운영이 가능하고, 형성평가를 통하여 수준별 학습이 이루어지며 평가결과는 피드백하여 활용할 수 있도록 개발하였다.
PET/CT 검사에서 종양의 특성에 따른 체적 측정 방법 비교
최용훈,반영각,오신현,임한상,김재삼,Choi, Yong Hoon,Ban, Yung Gak,Oh, Shin Hyun,Lim, Han Sang,Kim, Jae Sam 대한핵의학기술학회 2016 핵의학 기술 Vol.20 No.1
Purpose Recent retrospective studies are being actively conducted to analyze the survival of patients with SUVmax, MTV, TLG, such as information from a variety of PET originating. However, there is no clear way is difficult to accurately measure the volume of the tumor may be the difference between the caster is raised. In this study, to evaluate compare the volume measuring methods according to the characteristics of the tumor. Materials and Methods 18F-saline to fill the NEMA IEC Body Phantom insert the volume of balance and imbalance in phantom were acquired to the Biograph truepoint 40 (Siemens medical system, Germany) PET/CT scanner. The ratio of the volume and Background was acquired as 3.0, 5.0, 8.0, 18, 40. Clinical patients were randomly selected 120 people in staging patients with cancer of the digestive system from the year 2010 until the year 2014. Measurement methods were used a 40% threshold, 50% threshold and gradient segmentation technique, i.e. PET EDGE. Five years of experience of the two radio-technologist and one doctor was measured by repeated three times. Analysis methods were Intraclass correlation coefficient and Pearson correlation. Results In Phantoms, the 40% threshold method gave the best concordance between measured and actual volumes (r = 0.992, 0.997). In clinical patient outcome agreement between observers EDGE it is as high as 0.999 (CI: 0.998-0.999). And there were no statistical significance of the difference between the measurements (P = 0.620). 40% threshold method showed the best correlation between the measurements (r = 0.953). Increasing the ratio of tumor to background decreased the influence of a measuring method. Conclusion How to measure volume of the tumor in the patient was clinically most useful is 50% and the lowest impact on the characteristics of the tumor. Therefore, to reduce the background of the patients in PET/CT scan, it should be required research and effort.
Adaptive Resource Allocation for MC-CDMA and OFDMA in Reconfigurable Radio Systems
최용훈 한국전자통신연구원 2014 ETRI Journal Vol.36 No.6
This paper studies the uplink resource allocation formultiple radio access (MRA) in reconfigurable radiosystems, where multiple-input and multiple-output(MIMO) multicarrier-code division multiple access (MCCDMA)and MIMO orthogonal frequency-divisionmultiple access (OFDMA) networks coexist. By assumingmulti-radio user equipment with network-guidedoperation, the optimal resource allocation for MRA isanalyzed as a cross-layer optimization framework withand without fairness consideration to maximize the uplinksum-rate capacity. Numerical results reveal that parallelMRA, which uses MC-CDMA and OFDMA networksconcurrently, outperforms the performance of each MCCDMAand OFDMA network by exploiting the multiuserselection diversity.
최용훈,조현양 한국문헌정보학회 2015 한국문헌정보학회지 Vol.49 No.3
This research aims at executing a after reading activity using book trailers for the teenagers, and verifying its effects. For the investigation into its effectiveness, 6 classes on the first grade in a middle school were divided into 3 classes of an experimental group (104 students) and the other 3 classes of a comparative group (100 students), and a preliminary and a post test were conducted using the measurement tool on creativity and reading attitudes. As the result, the creativity, reading attitudes and understanding of the selected books of the experimental group were found to be better than those of the comparative group. 이 연구는 활자와 인쇄매체보다 영상과 음향매체 그리고 다양한 멀티미디어 기기에 익숙한 다매체세대인 청소년을 대상으로 북트레일러를 활용한 독후활동 프로그램을 실행하여 그 효과를 검증하는데 목적이 있다. 효과를 검증하기 위해 중학교 1학년 6학급을 실험집단 3학급(104명)과 비교집단 3학급(100명)으로 설정하여 창의성과 독서태도 측정도구를 활용하여 사전․사후검사를 실시하였다. 공분산분석(ANCOVA)을 통하여 발달정도를 측정하였으며, 선정도서의 독서퀴즈 문제를 활용하여 집단 간 선정도서에 대한 이해도 차이를 분석하였다. 연구 결과 북트레일러를 활용한 독후활동 프로그램을 적용한 실험집단의 창의성과 독서태도, 선정도서에 대한 이해도가 비교집단보다 높은 것으로 나타났다.
실시간 ATM 망 관리 시스템 구현을 위한 성능 감시와 고장 노드 식별 방안
최용훈,이길흥,송운섭,이준호,이재용,이상배 한국통신학회 1997 한국통신학회논문지 Vol.22 No.6
Performance management of ATM network is urgently required because a different quality of service should be guaranteed on each connection. A lot of performance measurement data increase the burden on agent systems and on managment stations. In this paper, an effective OAM-based performance monitoring and faulty node identification technique is proposed. A proposed VP Selection Algorithm reduces management-related traffic and when the indication of hard or soft failure state is detected, failed node is identified by Fault Identification Rule.