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공공정보화분야 예비타당성조사제도 도입 및 운영에 관한 연구
김기환(Kiwhan Kim) 한국정책분석평가학회 2007 政策分析評價學會報 Vol.17 No.2
Much attention has been given to necessity of ex-ante analysis that focuses on feasibility of governmental projects before their implementation. However IT programs of public sectors have less experienced feasibility studies compared to other public programs. National Finance Act which has been effective as of 2007 finally provides a framework of feasibility study(ex-ante analysis) of public IT projects. This study suggests that performance management of IT programs needs a life-cycle evaluation especially focusing on the ex-ante analysis. The recommendations that this paper proposes to make ex-ante evaluation effectively function are, life-cycle evaluation system, contingent evaluation framework according to types of projects, and appropriate utilization of results of evaluation.
정보화사업의 효과적인 평가를 위한 정부부처 유형분류 연구
김기환(Kiwhan Kim) 한국정책분석평가학회 2005 政策分析評價學會報 Vol.15 No.1
The primary functions of individual governmental agencies need to be considered in the process of planning, implementation, and evaluation of IT projects in the public sector. It is mainly because typical functions of each agency should differentiate implementation directions and processes, and evaluation indicators for IT projects. We, therefore, need to have a typological framework which analyzes features of governmental agencies in various aspects.Based on this framework we typify governmental agencies and elicit implications for planning, implementation, and evaluation of IT projects. We have selected 43 governmental agencies which are the targets of Informatization Level Evaluation. The framework is developed by two dimensions, one is main functions of agencies (i.e. planning vs. implementation), the other, clients of agencies (i.e. governmental vs. people). With two dimensions combined, we came up with four groups, planning-governmental, planning-people, implementation-governmental, and implementation-people. The typology and classification of governmental agencies in relation with public IT projects can be applied to the yearly-based Information Level Evaluation by providing appropriate evaluation indicators. The application is expected to lead effective informatization in the public sector.
International Regime for Trade in Hazardous Wastes - How to Make It Work Better
김기환(Kim Kiwhan) 한국국정관리학회 2002 현대사회와 행정 Vol.12 No.2
The paper discusses the effectiveness of international regime that deals with hazardous wastes trade. The Basel Convention was specifically designed to control international transportation of hazardous wastes. However, the implementation of the regime has not been successful in that the frequency and amount of wastes trade are not declining. This study examines statistics and theoretical perspectives of the wastes transportation, problems of existing regimes, and finally several policy recommendations that can make the regime work more effectively. The policy recommendations focus on improving the roles of non-governmental organizations, relationship with bilateral and/or regional agreements, compensation liability for damage resulting from wastes movement, and harmonization with domestic regulation.
다양한 Design Issue에 대한 터보 디코더의 성능분석
박태근,김기환,Park Taegeun,Kim Kiwhan 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.12a
Log-MAP 복호 알고리즘을 사용하는 터보 복호기는 뛰어난 복호 성능에도 불구하고, 반복적 연산으로 인하여 인터리버의 크기에 비례하는 많은 메모리와 높은 하드웨어 복잡도가 단점으로 지적된다. 이에 본 논문에서는 Log-MAP 복호 알고리즘 기반의 터보 복호기를 설계할 때 복호 성능 및 하드웨어 복잡도에 영향을 미칠 수 있는 다양한 설계 이슈들을 제시하고, 설계 이슈들의 변화에 따른 복호 성능을 모의실험을 통하여 비교 분석한다. 하드웨어 복잡도와 복호 성능간의 균형을 고려하여 수신정부 사전정보, 상태 메트릭을 각각 5 비트, 6 비트 그리고 7 비트로 할당하여 부동 소수점 연산의 비트오율에 근접하는 성능을 확인하였다. Log-MAP 복호 알고리즘의 주연산인 MAX*에 대한 하드웨어 복잡도와 복호 성능을 비교 분석하였다. MAX* 연산 중 계산도가 큰 오류 보정 함수를 근사화된 조합회로로 구성하여 하드웨어 부담을 줄일 수 있는 방법을 제시하였고, 윈도우 블록 길이가 32인 슬라이딩 윈도우 기법을 적용하여 적은 복호 성능 저하로 상태메트릭 저장에 필요한 메모리 공간을 감소할 수 있음을 확인하였다. Turbo decoder inherently requires large memory and intensive hardware complexity due to iterative decoding, despite of excellent decoding efficiency. To decrease the memory space and reduce hardware complexity, various design issues have to be discussed. In this paper, various design issues on Turbo decoder are investigated and the tradeoffs between the hardware complexity and the performance are analyzed. Through the various simulations on the fixed-length analysis, we decided 5-bits for the received data, 6-bits for a priori information, and 7-bits for the quantization state metric, so the performance gets close to that of infinite precision. The MAX operation which is the main function of Log-MAP decoding algorithm is analyzed and the error correction term for MAX* operation can be efficiently implemented with very small hardware overhead. The size of the sliding window was decided as 32 to reduce the state metric memory space and to achieve an acceptable BER.
개념단계에서 차세대고속철도 6량 편성차량의 현가요소 특성 분석
박찬경(Park Chankyoung),김영국(Kim Yongguk),김기환(Kim Kiwhan),김영모(YoungMo Kim) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Next Generation High Speed Train having a distributed electrical motor system has just been developing to aim the experimental maximum speed at 400㎞/h since August, 2007. This project is in stage of concept design and so, it needs to take some review and analysis the characteristics of suspensions on the view of concept design. A train dynamic modeling is modified with the one car model presented in the previous conference and it was extended to 6cars models having the same suspensions and added some connection"s characteristics between the cars with Vampire program. It is used to analyze the effect on the dynamic performances according to the variation of primary and secondary suspension characteristics in the condition of 6 cars configuration. The results would be useful to manage the potential risks in the next stage of basic and critical design that will be done by the manufacturing company.
빅데이터 시대의 한국과 영국간 개인데이터 활용정책 비교 연구
윤상오(Sangoh Yun ),김기환(Kiwhan Kim) 한국정책과학학회 2016 한국정책과학학회보 Vol.20 No.1
빅데이터 시대의 본격적 도래와 함께 잠재가치가 가장 크면서도 프라이버시 침해 문제로 가장 민감하고 논란이 큰 데이터가 개인데이터이다. 본 연구는 우리나라와 영국의 개인데이터 활용정책을 직접 비교하고 정책적 시사점을 찾고자 하였다. 그동안 우리나라는 개인데이터에 대해 활용가치보다는 보호가치에 중점을 둔 정책을 추진해 왔다. 그러나 영국은 활용과 보호 사이의 균형 관점에서 보호를 전제로 한 활용정책을 적극적으로 추진하고 있다. 특히 영국은 우리나라와 달리 개인데이터의 범위를 비정형 데이터까지 포괄적으로 규정하고, 정책의 초점도 기업이 보유한 개인데이터를 해당 개인에게 활용하도록 하는데 두고 있으며, 이를 위해 기업과 시민 그리고 정부가 자율적 협약에 따라 개인데이터를 공개하고 활용하도록 하는 비규제적이고 거버넌스적인 접근법을 채택하고 있다. 우리나라도 향후 데이터 정책의 범위를 공공기관의 공공데이터뿐만 아니라 민간기업의 개인데이터까지도 포괄하도록 하고, 개인데이터에 대한 보호와 활용의 균형 관점에서 활용을 촉진하기 위한 비규제적이고 거버넌스적인 정책을 수립・추진하는 것이 필요함을 제시하였다. As the big data era has emerged, personal data has become not only the most valuable in their volume, velocity, and variety but also the most sensitive in privacy problems. So far, Korean government has only pursued the protection value, not the utilization value of personal data. But U.K. government has implemented the personal data utilization policy based on the balance between the protection value and the utilization value of their data. In this research, we compare the personal data utilization policy of Korea with that of U.K. and suggest the policy implication to develop the personal data utilization policy of Korean government. U.K. government defined personal data comprehensively including unfixed social media data and they have been focusing on making people use their own personal data, which are owned and offered by private companies. To do this, U.K. government adopted the non-regulative and governance-type approach based on agreement among the government, companies and citizen groups. We recommend that Korean government should also establish and implement the non-regulative and governance-type personal data utilization policy based on the balanced perspective between protection and utilization of personal data.