VHDL 시뮬레이터의 커널 구현 ( Development of a Kernel of VHDL Simulator )

박성범,장영조,이철동 대한전자공학회 1989 특정연구 결과 발표회 논문집 Vol.- No.-

Complicated Pulmonary Pseudocyst Following Traumatic Lung Injury Rescued by Extracorporeal Membrane Oxygenation

박성범,이대상,유정암,조종호,조양현,정치량,양정훈,전경만,서지영,박치민 대한중환자의학회 2014 Acute and Critical Care Vol.29 No.3

Traumatic pulmonary pseudocyst is a rare complication of blunt chest trauma that usually appears immediately in children or young adults and is characterized by a single or multiple pulmonary cystic lesions on chest radiography and has spontaneous resolution of the radiologic manifestations. However, we experienced a case of a delayed complicated pulmonary pseudocyst in a 17-year-old boy following severe traumatic acute respiratory distress syndrome rescued by Veno-venous extracorporeal membrane oxygenation (ECMO). In this case, the pseudocyst appeared on the 12th day after trauma and transformed into an infected cyst. Veno-venous ECMO was successfully maintained for 20 days without anticoagulation.

Fabrication of Gas Diffusion Layer (GDL) Containing Microporous Layer Using Flourinated Ethylene Prophylene (FEP) for Proton Exchange Membrane Fuel Cell (PEMFC)

박성범,박용일 한국정밀공학회 2012 International Journal of Precision Engineering and Vol.13 No.7

Proton exchange membrane fuel cell (PEMFC), also known as polymer electrolyte membrane fuel cell, is the type of fuel cell being developed for transport applications as well as for stationary and portable applications. Typical PEMFC consists of several essential components, and gas diffusion layer is considered to be one of the most important components. Gas diffusion layer (GDL) in PEMFC works as a protective layer for the delicate catalyst structure, provides good mechanical strength and easy gas access to the catalyst, and improves the electrical conductivity. Consequently, GDL of PEMFC should have low electronic resistivity, specific surface to enhance good electronic contact and proper hydrophobicity for each application. The properties of the conventional GDL’s can be improved by implementing microporous layer instead of common thick porous support layer. Microporous layer (MPL) reduces the contact resistance between catalyst layer and macroporous substrate. The main purpose of using MPL is the water management, as they provide effective wicking of water from the cathode catalyst layer into the diffusion media, thus improving the overall performance of the PEMFC. In this study, the fabrication of GDL containing microporous layer (MPL) made from the slurry of FEP (Flourinated Ethylene Prophylene) mixed with carbon black was investigated in detail. The properties of FEP, such as low friction and nonreactivity,are same as those of PTFE; however FEP has few advantageous points than PTFE. FEP can be formed into desired shapes more easily; its softer than PTFE (melting temperature of FEP is 260 °C); it is highly transparent and resistant to sunlight. The microstructure of the developed GDL containing MPL was analyzed by SEM/EDX by observing the surface and cross section of the specimen. The properties such as viscosity, electric conductivity, density, porosity were measured. The amount of carbon loading to get optimum thickness was defined, and the performance of the fuel cell using developed GDL with MPL was evaluated.

3MW_th급 순환유동층 바이오매스 가스화기의 운전에서 Equivalence ratio 영향

박성범,이정우,송재헌,박대원,Park, Seongbum,Lee, Jeoungwoo,Song, Jaehun,Pak, Daewon 한국응용과학기술학회 2017 한국응용과학기술학회지 Vol.34 No.1

유동층가스화기는 경제적으로 기술적으로 입증된 기술로서 가장 상용화에 가까운 가능성을 보여주고 있다. 그러나 한국에서는 설계, 현장문제 해결뿐 아니라 파일럿 규모의 설비 운전 등이 부족하여 상용화에 이르지 못하고 있다. 본 연구에서는 바이오매스의 가스화를 위하여 3 MWth 급 순환유동층(CFB) 반응기를 개발하여 운전하였다. 유동층반응기는 순환유동층 반응기와 기포유동층 반응기로 구성되었으며 타르와 산성가스를 제거하기 위하여 세라믹필터, 급속냉각, 습식스크러버를 사용하였다. 3MWth 급 바이오매스 가스화기의 최적 운전조건을 도출하기 위하여 equivalence ratio에 따른 영향을 조사하였다 Fluidized bed gasification is technically and economically proven technology, which shows the high possibility of realization and commercialization. However, in Korea, development of FBG to the commercial scale for power generation and industry is mainly blocked by the fact that there is no experience of design, troubleshooting and operation of even pilot scale fluidized bed gasifier. In this study, a $3MW_{th}$ circulating fluidized bed(CFB) was newly developed for biomass gasification. The fluidized bed was mainly composed of circulating and bubbling fluidized reactors integrating in-situ tar removal step in the system. For cleaning of the tar and acid gas in the product gas, the sequential gas cleaning process comprised of a ceramic filter, rapid quencher and wet scrubber was adopted. Effect of equivalence ratio was investigated to find the optimal operating conditions for the $3MW_{th}$ integrated system of fluidized bed gasification.

트랜지스터의 게이트 크기를 고려한 Rule-based 배치 프로그램 개발

박성범,장영조,이철동,Park, Seong-Beom,Jang, Yeong-Jo,Lee, Cheol-Dong 한국전자통신연구원 1987 전자통신 Vol.9 No.1

본고에서는 트랜지스터의 게이트 크기, 연결관계를 표현하는 입력 회로 정보와 트랜지스터가 배치될 규격을 표시하는 78개의 rule을 이용해 효과적인 배치를 행하는 rule based 배치 프로그램에 대해 기술했다. 본 연구의 결과는 이후 진행될 배선 연구에 이용되어 트랜지스터 회로의 레이아웃 시스팀을 구축하기 위해 응용될 것이다. 프로그램은 VAX-II/750 UNIX 4.2 BSD하의 Franzlisp으로 개발되었다.

군 상부지휘구조 개편안(’11-’12)의 위험식별 분석과 검증결과 - 작전효율성을 중심으로 연구한 결과에 기초하여 -

박성범,조용만 국가안보전략연구원 2012 신안보연구 Vol.- No.174

South Korea Ministry of National Defense(MND) has been trying to reform its top military command structure in order to reinforce the jointness before receiving the operational command in war time from ROK-US Combined Forces Command(CFC) in December 2015. However, the effort starting from last year is being delayed because the bill of national defense reform plan has not passed the National Assembly requiring the detail schedule of the project, collecting the broad opinion from the public about the project and the result of verification on the top military command restructure. This article reviewed the critical points of the reform of top military command structure and analyzed the reform project by the technique of Risk Management. The result of the analysis was reclassified by SWOT(Strong, Weakness, Opportunity,Treat) technique. In order to verify the reform plan, my team collected much opinion from the military experts and took the professional advice to analyze operational performance procedure on the reform project. Also my team analyzed the reform project with AHP(Analytic Hierarchy Process) technique and war game model to find the operational efficiency of the reform plan. The analysis showed that the new project of MND has a lot of strong point and will improve the jointness of ROK forces. However, the new project of MND has also weakness and limitations at the same time so I suggested how to get rid of those problems. To reignite the reform project, MND has to prioritize the practical plans in detail and find out more institutional devices for strong jointness in order to reduce not only the known risk but also the unknown risk on the new top military command structure. In addition, this paper will be used to the sample of policy decision model,especially one of the policy proposal model presented by government. 국방부는 전시작전통제권 전환을 시점으로 군 상부지휘구조 개편을 통하여 한국군이 부족하다고 판단되는 합동성의 결핍에 대한 근본적인 체질을 변화시키고 작전효율성이 높은 지휘구조로 탈바꿈하고자 노력하였으나, 관련법의 통과가 늦어져 신 지휘구조에 대한 재편성, 예산반영, 지휘시설 구축 등 산적한 현안들을 해결하지 못한 채 시간만 허비한 경험을 가지고 있다. 이는 18대 국회 국방위 의원들이 지적한 것처럼 폭넓은 의견수렴 부족, 개편안에 대한 검증 미흡, 구체적인 추진계획 미흡, 신 지휘구조에 대한 확신 부족 등 때문이었다. 그래서 본 연구에서는 서로 다른 출처에서 제기된 개편안의 핵심내용을 재정리하고 이를 검증하기 위한 이론적 분석틀을 위험관리기법으로 설정하여 검증해 본 것이다. 국방부가 주장했던 개편안의 강점과 비판자들이 주장했던 문제점들을 발췌하여 이를 SWOT에 대입시켜 재정리한 후 이를 분석의 자료로 활용하였다. 개편안에 대한 검증은 작전효율성에 중점을 두고 과학적 분석기법인 설문 및 전문가 의견수렴을 거쳐 작성한 ‘작전수행절차 분석’, ‘계층적분석법(AHP)’,‘워게임모델’, 을지프리덤가디언 연습 등을 통해 검증한 과정과 결과를 제시하였다. 이러한 검증결과는 상충된 의견으로 제시되고 우려했던 개편안의 위험요소나 약점을 어떻게 보완하고 작전수행의 효율성을 증진하고 강점화 할 것인가에 대한 보완방향의 핵심이며 합동군제와 통합군제에 대한 비교분석 자료이기도 하다. 또한 본고에 정리한 내용들은 학술적으로도 정책제기 모형과 처리과정의 경험과 교훈으로도 활용이 가능할 것이다.

3차원 데이터의 다중 부호화 기법

박성범,김창수,이상욱 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.9

3차원 데이터의 다중 부호화 기법

박성범,김창수,이상욱,Park, Sung-Bum,Kim, Chang-Su,Lee, Sang-Uk 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.9c

본 논문은 3차원 데이터의 다중 부호화(multiple description coding, MDC) 기법을 제안한다. 우선 다수의 평면으로 구성된 3차원 데이터를 그래프 컬러링(graph coloring)을 통해 3차원 데이터 복원 시 동일한 기여도를 제공하는 2개 평면 부분집합(subset)들로 분할한다. 다음으로 복원된 3차원 데이터의 화질을 최대화하기 위해 각 평면 부분집합의 평면 정보를 채널 오류 환경(channel error condition)에 따라 적응적으로 변형시킨다. 변형된 평면 부분집합들은 각각 압축되고 개별 채널을 통해 복호기로 전송된다. 복호기에서 전송된 2개 평면 부분집합 정보가 모두 복호되었을 경우, 복원된 3차원 부분 정보들을 결합하여 고화질 3차원 데이터를 복원한다. 만약 단일 채널만 유효하여 3차원 영상의 부분 정보만 복원될 경우, 3차원 손상부 복구 알고리듬을 적용하여 영상 표면의 손상을 복원함으로써 부드러운 3차원 표면을 재생한다. 따라서 제안하는 기법은 전송 오류 환경이 열악하여 하나의 채널이 완전히 손실된 경우에도 최소한의 3차원 영상 복원 화질을 보장한다. A multiple description coding (MDC) scheme for 3-D Data is presented. First, a plane-based 3-D data is split into two descriptions, each of which has identical contribution in 3-D surface reconstruction. In order to maximize the visual quality of reconstructed 3-D data, then, plane parameters are modified according to channel error condition. Finally, these descriptions are compressed and transmitted over distinct channels. In decoder, if two descriptions are available, we reconstruct a high quality 3-D data. If only one description is transmitted, however, 3-D surface recovery scheme reduces artifacts on erroneous 3-D surface, yielding a smooth 3-D surface. Therefore, the proposed algorithm guarantees acceptable quality reconstruction of 3-D data even though one channel is totally lost.

Development of CNT field emitter for a high power electron source

박성범,김병주,강신재,김원석,안계혁 한국공업화학회 2013 한국공업화학회 연구논문 초록집 Vol.2013 No.1

Practical Issues in the Enforcement of Leniency Program in Korea

박성범 서울대학교 아시아태평양법연구소 2015 Journal of Korean Law Vol.15 No.1

Since its introduction in 1997, the leniency program has played an important role in Korea in detecting cartel activities that have the clandestine nature. Recently, however, its operation by the Korea Fair Trade Commission (hereinafter KFTC) gave rise to criticism among companies and practitioners, ranging from doubts over the leniency regime’s reliability or transparency to the fundamental skepticism over whether or why the leniency program itself should exist. Such criticism got intensified as statements submitted by leniency applicants have been dismissed in a number of recent cartel cases. Nevertheless, it is difficult to deny the efficacy of the leniency program, not only in detecting existing cartels but also in deterring future cartel activities. For this reason, the leniency program is indispensable for the KFTC to facilitate its investigation of cartels, which are by nature secretive. Therefore, the KFTC should continue its effort to beef up the leniency program by actively addressing practical issues that have been raised during the implementation and operation of the current leniency program. Against this backdrop, this article analyzes some practical key issues raised by the companies, the academia, and practitioners in the course of the KFTC’s implementation of the leniency program, including such issues as the reliability of leniency applicants and the interpretation of key leniency requirements such as degree of necessary evidence, termination of cartel activities, coercion, and the scope of continued and sincere cooperation. It also touches upon issues related to restricting leniency immunity against repeat offenders, joint leniency application and protecting identity of leniency applicants.