컴포넌트 기반 개발을 위한 기존 애플리케이션 클래스의 JavaBean으로의 변환

김병준,김지영,김행곤,Kim, Byeong-Jun,Kim, Ji-Yeong,Kim, Haeng-Gon 한국정보처리학회 2002 정보처리학회논문지D Vol.9 No.4

소프트웨어 부품화는 소프트웨어 개발에 있어서의 궁극적인 목표이다. 컴포넌트 기반의 개발은 이러한 재사용의 초점을 코드에 의한 수동적인 조작이나, 클래스 라이브러리보다 발전된 형태인 컴포넌트에 초점을 두고 있다. 컴포넌트 구축은 컴포넌트 모델에 적합한 새로운 소프트웨어 컴포넌트를 재개발 해야하는 비효율성으로 인해 추가적인 노력과 비용을 야기 시킨다. 최근 많이 사용되고 있는 자바 응용시스템의 경우 자바 언어 기반의 컴포넌트 모델이 존재하지만, 소규모의 재사용 단위나 제한된 GUI 컴포넌트 개발에만 머무르고 있어, 컴포넌트로의 기능을 충분히 발휘하지 못하거나 추가적인 비용, 노력이 필요하며 또한 특정 도메인 컴포넌트에서만 제한적이다는 단점이 있다. 따라서, 본 논문에서는 기존의 자바로 개발된 응용시스템을 기반 하여 자바의 컴포넌트 모델인 자바빈즈를 적용하기 위해, 컴포넌트를 확장 추출하고, 재사용단위로서 비즈니스 로직의 부분적인 수용을 통해 이 응용시스템에서의 자바빈즈로 변환하는 프로세스를 제시하고 알고리즘을 제안한다. Reusable software component is an ultimate goal for the software development. Component based development is focused on advanced concepts rather than passive manipulation or class library with source codes. However, the primary component construction in component based development lead to an additional development cost and effort for reconstructing the new software component within a component model. Java application provides several features based on component model. But, we only have an opportunity to develop the smallest reuse units or the restricted set of GUI components. It cannot contributed as a component and only used in the specific domain component with high cost and efforts. In this paper, we apply java component model to the existing java application and extract javabeans through extending the component scalability. We also discuss the algorithm for transformation mechanism from legacy class to javabeans with a partial of business logic.

EDFA로 증폭된 고출력 펄스 신호의 소광비 향상

김병준,최현범,이한협,이동한,김대연,권일범,Kim, Byung-Jun,Choi, Hyun-Beom,Lee, Han-Hyub,Lee, Dong-Han,Kim, Dae-Yun,Kwon, Il-Bum 한국광학회 2003 한국광학회지 Vol.14 No.2

높은 peak 값의 광 펄스 신호를 얻기 위하여 대역통과 필터(band pass filter)를 사용한 2단 구조 erbium-doped fiber amplifier (EDFA)를 구성하여 125 W peak 값과 32 ㏈ 소광비(extinction ratio)를 갖는 펄스 신호를 얻었다. 이때 pulse off power는 79 ㎽이다. pulse off power를 낮추고 소광비를 높이기 위하여 nonlinear optical loop mirror(NOLM)을 사용하였다. NOLM 을 통과한 펄스 신호는 35 W peak 값과 0.3 ㎽ pulse off power, 50.4 ㏈ 소광비를 갖는다. A two-stage erbium-doped fiber amplifier (EDFA) with a band pass filter is used to get optical pulses of high peak value. The pulse signal has a 32 ㏈ extinction ratio, 125 W peak power and 79 ㎽ pulse off power. A nonlinear optical loop mirror (NOLM) is used to lower the pulse off power so as to increase the extinction ratio. The pulse signal after the NOLM has a 50.4 ㏈ extinction ratio, 35 W peak power and 0.3 ㎽ pulse off power.

3변수 확률분포형에 의한 극치강우의 빈도분석

김병준,맹승진,류경식,이순혁,Kim, Byeong-Jun,Maeng, Sung-Jin,Ryoo, Kyong-Sik,Lee, Soon-Hyuk 한국농공학회 2004 한국농공학회논문집 Vol.46 No.3

This research seeks to derive the design rainfalls through the L-moment with the test of homogeneity, independence and outlier of data on annual maximum daily rainfall at 38 rainfall stations in Korea. To select the appropriate distribution of annual maximum daily rainfall data by the rainfall stations, Generalized Extreme Value (GEV), Generalized Logistic (GLO), Generalized Pareto (GPA), Generalized Normal (GNO) and Pearson Type 3 (PT3) probability distributions were applied and their aptness were judged using an L-moment ratio diagram and the Kolmogorov-Smirnov (K-S) test. Parameters of appropriate distributions were estimated from the observed and simulated annual maximum daily rainfall using Monte Carlo techniques. Design rainfalls were finally derived by GEV distribution, which was proved to be more appropriate than the other distributions.

개선된 다운힐 심플렉스 법을 이용한 주파수 영역에서의 뇌자도 신호원 추정

김병준,안광옥,이찬희,정현교,Kim, Byeong-Jun,An, Kwang-Ok,Lee, Chany,Jung, Hyun-Kyo 대한의용생체공학회 2008 의공학회지 Vol.29 No.3

Nelder-Mead downhill simplex method (DSM), a kind of deterministic optimization algorithms, has been used extensively for magnetoencephalography(MEG) dipolar source localization problems because it dose not require any functional differentiation. Like many other deterministic algorithms, however, it is very sensitive to the choice of initial positions and it can be easily trapped in local optima when being applied to complex inverse problems with multiple simultaneous sources. In this paper, some modifications have been made to make up for DSM's limitations and improve the accuracy of DSM. First of all, initial point determination method for DSM using magnetic fields on the sensor surface was proposed. Secondly, Univariant-DSM combined DSM with univariant method was proposed. To verify the performance of the proposed method, it was applied to simulated MEG data and practical MEG measurements.

유연성 기판에 사용되는 전해 동박의 절곡 및 굴곡 피로 파괴와 인장 특성과의 관계

김병준,정명혁,황성환,이호영,이성원,전기도,박영배,주영창,Kim, Byoung-Joon,Jeong, Myeong-Hyeok,Hwang, Sung-Hwan,Lee, Ho-Young,Lee, Sung-Won,Cbun, Ki-Do,Park, Young-Bae,Joo, Young-Cbang 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.1

유연성 기판 상의 동박의 반복 굽힘 변형에 따른 절곡 빛 굴곡 신뢰성과 인장 특성과의 관계를 규명하기 위해 4종류의 동박 시편의 절곡 신뢰성 실험, 굴곡 선뢰성 실험과 인장 실험을 실시하였다. 절곡 신뢰성 실험은 동박에 5.3%의 굽힘 변형률을, 굴독 선뢰성 실험은 동박에 2.0%의 굽힘 변형률을 반복적으로 인가하면서 전기 저항 변화를 관찰하고 피로 수명을 평가하였다. 또한, 4가지 시편의 인장 실험을 통해 탄성 계수, 항복 강도, 연장 강도, 인성 등의 재료 물성을 구한 결과, 연성과 인성이 우수한 시편의 경우 절곡 및 굴곡 신뢰성이 크게 우수한 것으로 나타났다. 반면, 탄성 계수, 항복 강도의 경우 절곡 및 굴곡 신뢰성과 큰 연관성을 보이지 않았다. 이는 절곡 및 굴곡 변형에 의한 금속의 피로 파괴 거동은 재료의 파괴 인성과 밀접한 관계를 가지기 때문으로 판단된다. Folding endurance, bending fatigue and monotonic tensile tests of 4 kinds of Cu foil on flexible substrate was performed to investigate the relationship between folding or bending endurances and tensile characteristics. The repeated 5.3 or 2.0% strain was applied to Cu foil in folding endurance test or bending fatigue test while monitoring the electrical resistance. Elastic modulus, yield strength, ultimate tensile strength, ductility, and toughness were obtained by monotonic tensile test on the same samples. The Cu foil with higher toughness and ductility showed higher reliabilities in folding or bending fatigue. However, elastic modulus and yield strength did not show any relationship with folding and bending reliability. This is because the failures of Cu foil by folding or bending fatigue were closely related to the fracture energy of metal.

유도탄 실사격 및 반응시간 분석보고서를 활용한 함정 통합전투성능 운용시험평가 발전방안 제시

김병준,강정석,허장완,고장수,Kim, Byungjun,Kang, Jeongseok,Hur, Jangwan,Ko, Jangsoo 한국군사과학기술학회 2022 한국군사과학기술학회지 Vol.25 No.3

This study aims to introduce missile live-fire during the ship operational test and evaluation(T&E) as a means of verifying the integrated combat capability(ICC) of various systems installed on naval ships. The research method identified domestic and foreign T&E systems and cases, and reports related to ICC, which were written during the ship's design stage. As a result of research, Republic of Korea is not conducting the missile live-fire at the ship T&E stage due to the lack of relevant systems, while the U.S. is conducting it based on the mission-based T&E and the end-to-end test system. As a way to improve within the current domestic ship acquisition systems, the reaction time analysis, a quantitative analysis result of ICC calculated at the ship basic design stage, was proposed to be verified by missile live-fire during ship operational T&E.

다중빔 광디스크용 빔 회전 구동기의 제작과 특성평가

김병준,김수현,곽윤근,Kim, Byeong-Jun,Kim, Su-Hyeon,Gwak, Yun-Geun 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.12

To enhance the effective data transfer rate the multi-beam optical disk drive is presented. The Beam rotating actuator is necessary for putting multi-beam on more than one track. Ray tracing was also executed for real system set-up. The beam Rotating Actuator is made up of piezoelectric material, high stiffness wire hinge and dove prism. The actuator has about 1kHz natural frequency and suitable operational range. The dynamic equation for the actuator is derived for the control real system.

출판저널칼럼

김병준,Kim, Byeong-Jun 대한출판문화협회 2000 출판저널 Vol.273 No.-

아동과 홈 로봇의 심리적.교육적 상호작용 분석

김병준,한정혜,Kim, Byung-Jun,Han, Jeong-Hye 한국정보교육학회 2005 정보교육학회논문지 Vol.9 No.3

To facilitate interaction between home robot and humans, it's urgently needed to make in-depth research in Human-Robot Interaction(HRI). The purpose of this study was to examine how children interacted with a newly developed home robot named 'iRobi' in a bid to identify how the home robot affected their psychology and the effectiveness of learning through the home robot. Concerning the psychological effects of the home robot, the children became familiar with the robot, and found it possible to interact with it, and their initial anxiety was removed. As to its learning effect, the group that studied by using the home robot outperformed the others utilizing the other types of learning media (books, WBI)in attention, learning interest and academic achievement. Accordingly, home robot could serve as one of successful vehicles to expedite the psychological and educational interaction of children.

어린이책 내는 일의 어려움과 고단함

김병준,Kim, Byeong-Jun 대한출판문화협회 1992 출판저널 Vol.105 No.-

어린이 문제에 있어서 항상 그렇듯이 아동도서에는 '안됨'이라는 용어가 너무 난무하다. 과학입국을 부르짖으면서 공상과학소설은 허무맹랑해서 안되고, 할아버지의 무릎에서 자신은 무시무시한 옛날 이야기를 즐겼으면서 괴기소설은 안되고, 추리소설은 비인간적이니 안되고, 삽화가 만화적이어도 읽어서는 안된다고들 말한다.