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이규욱(Kyu-Ouk Lee),오행석(Heang-Suk Oh) 한국엔터테인먼트산업학회 2009 한국엔터테인먼트산업학회논문지 Vol.3 No.2
신속한 서비스의 변경 및 처리를 위해서는 고객이 직접 개방된 운영시스템에 접속하여 신속하게 요청사항을 전달할 수 있어야 하며, 이러한 고객의 요청사항을 즉시적으로 전달망에 적용할 수 있어야 한다. 이러한 BcN 서비스 환경을 수용하기 위해서는 BcN 서비스 전달망에 대한 품질 제어가 가능한 구조수립이 필요하다. 본 논문에서는 가입자망 구간의 Flow-Based Router에서는 서비스별 트래픽 분리를 통하여 flow별 관리 기능과 개별 서비스 flow에 대한 실시간 트래픽 제어 기능을 통하여 차별화된 품질 보장을 제공한다. 또한 품질 제어 구조를 도입함으로써 최소한의 자원을 가지고 서비스 품질을 극대화 할 수 있게 함으로써 자원 효율성을 최적화하였다. In order to change and process service quickly, customers need to send service request by accessing an open operating system and it must be possible to alter the transmission network according to the service request. For that purpose, it is essential to build a system which enables a quality control on BcN service transmission network. This paper presents the way of providing quality of service through a traffic separation by the type of service at flow-based router and real-time traffic control on each service flow. Furthermore, resource utilization can be optimized by maximization the service quality with minimum resource due to the introduction of quality control structure.
이규욱(Gyu-Wook Lee),최우형(U-Hyeong Choi),정예현(Yae-Hyun Jung),이주희(Joo-Hee Lee),윤인하(In-Ha Yun),허영철(Yeong-Cheol Heo) 한국방사선학회 2020 한국방사선학회 논문지 Vol.14 No.1
본 연구의 목적은 3차원 입체조형 방사선 치료 계획에 고밀도 인공 물체를 삽입하는 불확실성을 보정하기 위해 반복적 재구성(IR)의 유용성을 평가하는 것이다. 쇠구슬 팬텀과 티타늄이 삽입된 대상자의 CT Simulation 영상에서 IR을 적용한 영상과 IR을 적용하지 않은 영상을 얻었으며 선량 평가 인자인 HI, MU와 체적 평가 인자인 Volume과 PCI를 비교하였다. 쇠구슬과 티타늄 팬텀 실험 결과 IR을 적용할 때 고밀도 인공물질의 부피가 각각 4.850%, 11.456% 줄었으며 MU는 0.924%, 1.181% 감소하였다. HI는 0.106%, 0.272% 감소하였고 PCI는 0.358%, 0.867% 감소하였다. IR을 척추 성형술, 대퇴부 정렬핀, 손목 정렬핀 등 대상자의 CT 영상에 적용했을 때 인공물의 부피는 47.76%, 23.841%, 49.339% 감소하였다. MU도 0.924%, 0.294%, 1.675%, HI는 1.232%, 0.412%, 1.695% 감소하였으며 PCI는 4.022%, 0.512%, 13.472% 감소하였다. 결론적으로 3차원 입체조형 방사선 치료 계획시 IR을 적용했을 때 고밀도 인공물이 삽입된 팬텀과 대상자 케이스에서 선량과 체적이 모두 감소되었다는 것을 확인할 수 있었다. The purpose of this study is to assess the usefulness of IR to compensate for uncertainties in inserting high density artificial objects in radiation treatment planning in the 3D-CRT treatment technique. CT images of the subjects with phantom and titanium inserted were obtained from images without IR and images with IR, and the dose evaluation factors HI, MU and volume evaluation factors Volume and PCI were compared. The results of the stainless steel and titanium phantom experiments showed that the volume of high density artificial material was reduced by 4.850% and 11.456% respectively when applying IR. MU decreased 0.924% and 1.181%. HI was down 0.106% and 0.272%. PCI decreased 0.358% and 0.867%. When IR was applied to CT images of subjects with vertebroplasty, Femur alignment pin and wrist alignment pin, the volume of artifacts decreased by 47.76%, 23.841%, and 49.339%. MU also decreased 0.924%, 0.294% and 1.675%, while HI decreased 1.232%, 0.412% and 1.695%. PCI decreases 4.022%, 0.512%, and 13.472%. In conclusion, When IR was applied to 3D-CRT treatment plan, both dose and volume in phantom and subject case with high density artificial insert were reduced.
공업고등학교 학생의 전공학과에 대한 흥미에 관련된 변인과 그 흥미와 학업성취와의 상관
이규욱(Kyu Wook Lee),김판욱(Pan Wook Kim) 대한공업교육학회 1990 대한공업교육학회지 Vol.15 No.1
The purpose of this study was to offer the basic information for the improvement of the selection criteria on a major course at the technical high school. The contents of the study were to investigate the degree of technical high school student`s interests at their major course, to find the variables related to the degree of their interests, to recognize the correlation between the scholastic achievement and the degree of their interests at their major course, and to test the significant differences on the correlation. The method of the study were a questionnaire survey and the test of the degree of their interests at their major course, which were conducted on the clustered samples of 452 students at studying Uijongbu Technical High School. After data screening, 444 data were analyzed by one way analysis of variance, Pearson`s product-moment correlation cofficient, Fisher`s t-test, and Hotelling`s t-test. Followings were main findings of the study ; Firstly, the variables affecting the degree of their interests at their major course were, entrance reasons, prerecognization on the majoring fields, the aptitude of student, the course after graduation, and schooling grades. Secondly, the correlation cofficient between the scholastic achievement level of major subjects and the degree of their interests at their major was 0.29, and that between the scholastic achievement levelof general subjects and the degree of their interests at their major course was 0.21. Correlation between the scholastic achievement level and the degree of their interests at their major course presented a significant difference. Thirdly, there was a significant difference between the correlation of the scholastic achievement level of major subjects and the degree of their interests at their major course, and that of the scholastic achievement level of general subjects and the degree of their interests at their major course. Based on the findings, I recommended that it would be progressed the scholastic achievements, if the students` interests on the major course than their learning records would be emphasized when the entrance examination is held.