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- 저자 : 양승우(SeungWoo Yang) (검색결과 12 건)
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양승우(Seungwoo Yang),한무재(Moojae Han),신요한(Yohan Shin),정재훈(Jaehoon Jung),최윤선(Yunseon Choi),조흥래(Heunglae Cho),박성광(Sungkwang Park) 한국방사선학회 2020 한국방사선학회 논문지 Vol.14 No.1
본 연구에서는 전자선 치료에서 전자선 선량 측정 시 교차교정이 필요한 기존 평행평판형이온함을 대체하고자 하였다. 광도전성 반도체 화합물 HgI₂를 사용하여 선량계로 제작하였으며, 선형가속기에서 6, 9, 12MeV 전자선에 대한 HgI₂ 선량계의 특성을 분석하였다. 그리고 기존 선량계와의 대체가능성과 전자선 선량계로서의 적용 가능성을 평가하고 전자선 선량계 개발의 기초연구로써 활용하고자 하였다. 재현성 평가결과, RSD는 6, 9, 12 MeV 에너지에서 각각 0.4246%, 0.5054%, 0.8640%로 나타나 출력 신호가 안정적인 것을 나타내었다. 선형성 평가결과, 직선형 추세선의 신뢰도 지표 R²값은 6 MeV에서 0.9999, 9 MeV에서 0.9996, 12 MeV에서 0.9997로 나타나 선량이 증가함에 따라 HgI₂에 출력 신호가 비례한 것을 확인할 수 있었다. 본 연구의 HgI₂ 선량계는 전자선 측정 적용가능성이 매우 높은 것으로 판단되며, 전자선 검출에 대한 기초연구로 활용될 수 있을 것으로 사료된다. In this study, it was intended to replace the existing plane parallel ionization chamber, which requires cross-calibration in electron beam treatment. The semiconductor compounds HgI₂ was fabricated as detector, and the characteristics of HgI₂ detector for the 6, 9 and 12 MeV electron beam was analyzed in the linear accelerator. It was also intended to evaluate the possibility of substitution with existing detectors and their applicability as electron beam dosimetry and to use them as a basic study of the development of electronic beam dosimeter. As a result of reproducibility, RSD was 0.4246%, 0.5054%, and 0.8640% at 6, 9, and 12 MeV energy, respectively, indicating that the output signal was stable. As a result of the linearity, the R2 was 0.9999 at 6 MeV, 0.9996 at 9 MeV, and 0.9997 at 12 MeV showed that the output signal is proportional to HgI₂ as the dose is increased. The HgI₂ detector of this study is highly applicable to electron beam measurement, and it may be used as a basic research on electron beam detection.
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Evaluation of Lead Oxide Dosimeter for Quality Assurance of Electron Beam in Radiotherapy
양승우(Seungwoo Yang),한무재(Moojae Han),박성광(Sungkwang Park) 한국방사선학회 2021 한국방사선학회 논문지 Vol.15 No.1
방사선 치료 영역에서 전자선은 표재성 병변 치료에 자주 쓰인다. 전자선은 빔 경로에 것들과 상호 작용하여 선량측정에 영향을 끼치기에 정확한 측정이 요구된다. 하지만 전자선 정도관리에 관한 연구는 이루어 지고 있지 않는 실정이다. 이에 본 연구에서는 전자선 정도관리를 위한 기초연구로 PbO 기반의 선량계를 제작하였다. 그리고 6, 9, 12 MeV 에너지에 따른 재현성, 선형성을 분석하여 계측정확성과 정밀성을 평가하였다. 재현성 측정결과 6, 9, 12 MeV에서 각각 1.024%, 1.019%, 0.890%의 RSD 값으로 나타났다. 그리고 선형선 측정결과에서는 6, 9, 12 MeV에서 모두 0.9999 R2로 나타났다. 두 평가 모두 우수한 결과로 PbO 선량계의 계측정확성과 정밀성이 매우 우수한 것으로 나타났다. In radiation therapy, electron beam is often used in the treatment of superficial lesion. Accurate measurements are required because electron beam interacts with them in the beam path and affects dose measurements. However, no research has been conducted on electron beam quality assurance. in this study, PbO-based dosimeter was fabricated as a basic study for electron beam quality assurance. Thus, the reproducibility and linearity of the energy of 6, 9, and 12 MeV were analyzed to evaluate measurement accuracy and precision. Reproducibility measurements show RSD value of 1.024%, 1.019% and 0.890%, respectively, at 6, 9, and 12 MeV. linearity measurements show 0.9999 R2 at 6, 9, and 12 MeV altogether. Both evaluations show that the PbO dosimeter has very good measurement accuracy and precision with excellent results.
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전자선 치료의 선량 측정 QA를 위한 PbI₂ 선량계 적용 연구
양승우(Seungwoo Yang),한무재(Moojae Han),정재훈(Jaehoon Jung),최윤선(Yunseon Choi),조흥래(Heunglae Cho),박성광(Sungkwang Park) 한국방사선학회 2020 한국방사선학회 논문지 Vol.14 No.5
전자선은 선량분포에 영향을 주는 인자가 많아 동일 설정이라도 사용 장비마다 그 특성을 파악하여 방사선 치료에 이용해야 하며, 체내 구조물에 영향이 민감하여 종양에 균일한 선량분포를 조사하기가 까다롭다. 본 연구에서는 광도전체인 PbI₂를 사용하여 선량계를 제작하였고, 선형가속기에서 6, 9, 12 MeV 전자선에 대한 전기적 특성을 분석하였다. 재현성 평가결과, RSD는 6, 9, 12 MeV 에너지에서 각각 1.1215%, 1.0160%, 0.5137%로 나타나 출력 신호가 안정적인 것을 나타내었다. 선형성 평가결과, 직선형 추세선의 신뢰도 지표 R² 값은 6, 9, 12 MeV에서 각각 0.9999, 0.9999, 0.9994로 나타나 선량이 증가함에 따라 PbI₂에 출력 신호가 비례한 것을 확인할 수 있었다. 본 연구의 PbI₂ 선량계는 전자선 측정 적용가능성이 매우 높은 것으로 판단되며, 광도전체 물질을 통한 전자선 선량계의 기초연구로 활용될 수 있을 것으로 사료된다. Electron beam have many factors that affect dose distribution, so even if identical settings are used, they should be identified and used for radiation treatment, and the effects on the structures in the body are sensitive, making it difficult to investigate uniform dose distribution on tumors. In this study, a dosimeter was produced using PbI₂ which is a photoelectric material, and electrical characteristics were analyzed for 6, 9, and 12 MeV electronics in linear accelerators. The reproducibility test results showed that RSD were 1.1215%, 1.0160%, and 0.05137% respectively at 6, 9, and 12 MeV energies, indicating that the output signals were stable. The linearity evaluation results showed that the R² values of the reliability indicator for straight line trend lines were 0.9999, 0.9999, and 0.9994, respectively, at 6, 9, and 12 MeV, to confirm that the output signal was proportional to PbI₂ as dose increased. The PbI₂ dosimeter in this study is judged to be highly applicable to electromagnet measurement and is thought to be able to be used as a basic study of electron detector through photoelectric material.
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김다혜(Kim, Dahye),양승우(Yang, Seungwoo) 도시정책학회 2021 도시부동산연구 Vol.12 No.1
The purpose of this study is to analyze utilization characteristics on the under-space of railway viaduct in Japanese, which appeared after. The conclusions of this study are as follows: First, The Japanese cases showed the characteristics of promoting regional revitalization through development that reflected the land use and urban context of the areas in which each was located. Second, in Japan, there are cases of expanding local facilities such as medical facilities, child care centers and shared offices through the development of under-spaces of railway viaduct in connection with community design. Third, Japan s under-spaces of railway viaduct is mainly developed under the leadership of railroad companies, but there is a system to encourage various entities to cooperate in carrying out projects. Through these systems, the public can efficiently carry out projects in cooperation with private operators who have know-how in development projects.
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황석원(Seogwon Hwang),양승우(SeungWoo Yang),안두현(Doo Hyun Ahn),이세준(Sejun Lee),신은정(Eunjung Shin),양현채(Hyeonchae Yang),한웅규(Ungkyu Han),강희종(Hee Jong Kang),이다은(Daeun Lee),진성만(Seongman Jin),송충한(ChoongHan Song),김해도 과학기술정책연구원 2020 정책연구 Vol.- No.-
In the era of digital transformation, the government is pushing for R&D system integration. The goals of this study are as follows. It presents theories and methodologies for innovation in data-driven R&D management. Second, we propose an innovation policy plan for data-driven R&D management. According to previous studies, data-driven R&D has recently become important due to evidence-based science and technology policy, science of science policy, the 4th industrial revolution, and big data. In 2013, the OECD announced Data-driven Innovation. Korea is linking and integrating R&D databases (e.g. NTIS ; National Science & Technology Information Service). The vision and framework of this study is as follows. The vision of this research is to build a ‘national science and technology data platform’ for data-driven R&D. The ‘national science and technology data platform’ is the most important to meet the needs of data users. Therefore, the framework of this study identifies the user needs of the R&D process. The R&D process consists of five fields (planning / selection / execution / performance evaluation / performance utilization / infrastructure). First, Planning Innovation for Data-driven R&D. R&D planning refers to an activity that prepares efficient means to achieve R&D goals. R&D planning methods is largely divided into Qualitative Method and Quantitative Method. The Qualitative Method is a method of utilizing the experience and opinion of experts. Quantitative Method is a method that utilizes statistics and trend analysis. Recent R&D Planning uses a mixture of Qualitative Method and Quantitative Method (e.g. technology roadmap, DelpHi, Technology Life Cycle, Cross Impact Analysis, etc.). The planning innovation policy task for data-driven R&D suggests building a platform for integrating and providing R&D planning information, constant monitoring, establishing a BERA (Big-data based Early-stage R&D Analysis) centers, and providing consulting services. Second, Selection and Implementation Innovation for Data-driven R&D. As a result of the survey, there is a problem with fairness in the selection and implementation of R&D. To solve the problem of selection and implementation, it is necessary to build a big data platform. The selection and implementation innovation policy task suggests step-by-step intelligence, the establishment of an R&D big data ecosystem, and the use of advanced technologies. Third, Performance Evaluation Innovation for Data-driven R&D. Performance Evaluation refers to an activity that evaluates R&D according to indicators. Performance evaluation lacks autonomy, strategy, expertise, and openness. Therefore, the Performance Evaluation Innovation policy tasked to suggest accumulation, linkage, and sharing with evaluation information, utilization of evaluation results, and establishment of a policy monitoring system. Fourth, Research Utilization Innovation for data-driven R&D. Research Utilization lacks user supported services (supplier-centered management), connectivity/openness, technical/policy basis, information protection standards, and compensation system. Therefore, the Research Utilization Innovation policy task was to propose user-oriented information provision, activation of DB-linked services, reinforcement of access to research data, and establishment of rules for using research information. Fifth, Data Infrastructure Innovation for Data-driven R&D. Data Infrastructure is the most important to collect data that can be utilized. Therefore, it should be reorganized centering on the users (organizations) used. In conclusion, this study proposes the establishment of a ‘national science and technology data platform’ for the development of data-driven R&D innovation policies. The ‘national science and technology data platform’ should be developed step by step (1st to 3rd steps).
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정장훈(Janghoon Jeong),양승우(Seungwoo Yang),홍성주(SungJoo Hong),최종화(Jonghwa Choi),김명순(Myungsoon Kim),하리다(Reeda Ha) 과학기술정책연구원 2017 정책연구 Vol.- No.-
As the economic crisis, research for Improving Government R&D Budget Efficiency are discussed constantly. And that"s why we analyze R&D Budget Allocation focus on comprehensive Coordination System and Distribution Standard of R&D Budget. In chapter 2, We introduce theoretical background consist of Government Budget System, Government Budget Allocation & Coordination Process and R&D Budget comprehensive Coordination System. In chapter 3, we explore problems of R&D Budget Allocation. On the basis of Status on R&D Budget Allocation & Coordination and Previous Studies, we set direction for improving allocative efficiency. In chapter 4, we review Budget of National Science & Technology Council, Cases of United States of America and Japan, standard of Macroscopic Resource Allocation. In chapter 5, by combining analysis results, we derive various problems and propose improvements of R&D budget allocation. According to the results of this study, the problems of R&D budget allocation and coordination are as follows. First, since deliberation of National Science & Technology Council has no binding power, it has little impact on budgetary process. Second, it is difficult to strategically set direction because the Spending Limit is set as bottom-up, and the department has no discretionary authority over Program Spending Limits. Third, it is difficult to strategically allocate the budget because the Top-down system is hardly operated according to the purpose of the system. Therefore, the suggestions for improve the R&D budget allocation and coordination are as follows. First, the National Science & Technology Council’s right to budget allocation and coordination should be amended to vote from deliberate under Framework Act on Science and Technology. and the Organization should consist of a bunch of civilian experts not bureaucracy. Second, Bottom-up elements should be used under the Top-down system. To set Spending Limits effectively, it should be operated according to a program focused on General Account. Third, the compatibility between science & technology related plans should be secured focused on Framework Plan on Science and Technology. Fourth, it should be establish a basis for the (tentative) Strategic R&D Project at the Innovation Headquarters (under Ministry of Science and ICT) level. and Special budget should be secured for National Undertaking by amend National Finance Act. To improve the problem of Sunset, The right to Preliminary Feasibility Study should be transferred to Ministry of Science and ICT. Fifth, National Science & Technology Council’s discussion should be submit to Council and open up by newly established regulation. This study has academic significance as it is improve the accuracy of problem diagnosis by covering acquired qualitative methods on R&D budget allocation process recognized as Black Box. Also, this study has politic implications as it is a key debate on the macro-budgetary allocation in the low-growth period, and it is one of major national political agendas of the current government. It is expect that future study provide a comprehensive analysis of the budget system based on the basic data for improving the efficiency of the government R&D budget process provided in this study.
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