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레거시 애플리케이션 시스템에서 폼 기반 역공학적 객체 분석 프로세스
이창목(Chang-Mog Lee),이정열(Jeong-Yeal Lee),김정옥(Jeong-Ok Kim),유철중(Cheol-Jung Yoo),장옥배(Ok-Bae Chang) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1B
레거시 애플리케이션 시스템(이하 LAS: Legacy Application System)은 차세대 비즈니스 시스템들로 통합되어야 하는 가치 있는 자산이다. 이러한 LAS의 이점을 얻기 위해, 레거시 비즈니스 시스템을 역공학적으로 분석할 수 있다. 본 논문은 LAS의 폼으로부터 의미 있는 정보를 파악하여 다음 세대의 시스템에 통합될 수 있도록 객체단위로 분할하여 분석한 다음, 이러한 정보를 이용하여 재사용 및 재공학을 할 수 있도록 하기 위한 역공학적 객체 분석 프로세스(이하 FOAP)를 제안한다. 본 논문에서 제안하는 FOAP는 4단계 즉, 폼 사용사례 분석 단계, 폼 객체 분할 단계, 객체구조 모델링 단계, 객체 모델 통합 단계 등으로 구성되어있다. 폼 사용사례 분석 단계는 폼 구조 그리고 LAS와 사용자간의 상호작용 등의 정보를 획득하는 단계다. 폼 객체분할 단계는 폼 정보를 의미 있는 필드들로 구분하는 단계다. 객체구조 모델링 단계는 폼 객체들간의 구조적 관계와 협력 관계를 파악하여 모델링하는 단계다. 마지막으로 객체 모델 통합 단계는 객체 단위의 단위 모델들을 통합하여 추상화된 정보를 포함한 상위 수준의 통합 모델을 유도하는 단계다. FOAP에 의해 결과적으로 생성된 객체 통합 모델은 역공학 기술자들의 LAS 이해와 , LAS의 정보를 새로운 시스템에 적용하는데 있어 좀 더 용이한 효율성을 제공한다.
레거시 Java Code로부터 디자인 패턴 추출을 위한 AOL 기반 프로세스
이창목(Chang-Mog Lee),이정열(Jeong-Yeal Lee),김정옥(Jeong-Ok Kim),유철중(Cheol-Jung Yoo),장옥배(Ok-Bae Chang) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅱ
객체지향 디자인 패턴은 아주 작은 재사용 구조로서 객체지향 방법론의 가장 큰 장점인 재사용성과 모듈성을 극대화시켜 실제 구현 과정에서 해결 방안으로 제시 가능한 것으로 이를 적용하면 시스템 개발은 물론 유지 보수에도 큰 효과가 있다. 순공학에서는 디자인 패턴을 이용하는 이점이 명확하지만, 소프트웨어 인공물들 즉, 디자인이나 코드 등에서 디자인 패턴의 사례를 발견하기 위해 사용하는 역공학 기술은 프로그램의 이해, 디자인을 코드로 변환하는 변환성, 코드의 질적 평가 등의 핵심 영역에서 유용하다. 봄 논문은 Java 소스 코드를 AOL(Abstract Object Language)이라는 추상객체언어를 이용하여 클래스 특성 추출기 및 패턴 식별기라는 단계를 통해 구조적 디자인 패턴을 추출하는 프로세스에 대하여 기술한다.
宋梓,鄭暢泳,具成烈 연세대학교 대학원 1988 延世論叢 Vol.24 No.-
I. Introduction By the comparative analysis of electronics parts industries in Korea and Japan, present problems and future development plans of the Korean electronics parts industry are described. II. Overview of electronics industry in Korea and Japan 1. Electronics industry in Korea 1) Composition of sectors (1) The growth rates of production and exports are higher than that of imports in all sectors of the electronics industry. (2) Due to the structural improvement the share of industrial equipment increased while that of consumer products decreased in total production and exports. (3) In imports, the shares of consumer products and parts and components decreased while that of industrial equipment increased. (4) In all sectors, the ratio of domestic production in total domestic demand increased. 2) Trade structure (1) The amount of trade volume increased. By countries, trade with Japan is in the deficit while that with America is in the surplus. This tendency has been reinforced. (2) In exports, the share of America increased while that of Japan decreased. But in imports, there is no such tendency. (3) In sectoral composition of trade, exports to Japan is heavily dependent upon parts and components while exports to America is mainly composed of consumer products. Import is centering around parts and components. 3) Foreign investment (1) The share of foreign firms in the electrical and electronics industry increased. By sectors, the shares of parts and components decreased while that of industrial equipment increased. (2) By countries the share of Japan is large, and by sectors that of parts and components is large. (3) In production and exports, the share of foreign firms decreased but in industrial equipment their share is very large. (4) The tendency of international division of labor lessens in the joint ventures while it was strengthened in the domestic firms. 4) Technology The import of technology would result in direct and indirect costs to the Korean economy. 2. Electronics industry in Japan (1) The growth rates of production and exports are higher than that of imports, and the growth rate of exports is higher than that of production. (2) The sectoral composition is moving away from consumer product and industrial equipment to industrial equipment and parts and components. (3) The export composition becomes less dependent on consumer products. But the share of consumer products in total exports is the largest among electronics sectors. (4) The share of parts and components in total import is large, and that tendency is more intensified. III. Electronic parts and components industry in Korea and Japan 1. Electronic parts and components industry in Korea 1) Overview The share of parts and components in total electronics industry decreased in production and imports, but increased in exports. 2) Specification of parts and components(See Table 3-1) 3) The recent trend of electronic parts and components industry in Korea (1) The demand of domestic parts and components has increased. (2) In spite of the increase in demand, the supply capacity of parts and components is limited by lack of capital and raw materials. 4) The importance of electronic parts and components industry (1) In international competition, parts and components play a major role. (2) The development of electronic parts and components industry could be attained by dynamic and growing small-medium size enterprises. (3) The export market of electronic parts and components industry is promising. (4) The electronic parts and components industry is suitable to the Korean factor endowments. 5) The electronic parts and components industry in Korea. The share of parts and components in total electronics industry decreased in production and exports and imports. 3. The comparison between Korean and Japanese electronic parts and components industry. (1) The magnitude and scale of Korean electronic parts and components industry is inferior to that in Japan. (2) The ability of R & D of Korean firms is inferior to that of Japanese counterparts (3) In basic materials, Korea is far behind to Japan. (4) The linkage between components firms and assembly firms is weak in Korean electronics manufacturing. IV. Conclusion (1) In order to develop parts and components industry, growth of small and medium size enterprises have to be vigorously promoted. (2) The individual parts and components based strategy is desirable. (3) The future development prospect of electronic parts and components heavily depends on R & D effort.
Analysis of Harvesting Part for Radish Harvester
( Yeon-jun Jung ),( Hyeon-ho Jeon ),( Hee-jong Jung ),( Taek-jin Kim ),( Jong-yeal Shim ),( Tae-ho Han ),( Chang-hyun Choi ),( Hae-yoon Tak ),( Yong-joo Kim ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
The agricultural labors are rapidly decreasing due to the aging of the agricultural population and the feminization. In Korea, radishes account for around 78.1% of the root vegetables in 2014, and the ratio of labor in harvesting and transporting work is about 26.7%. Therefore, it needs to develop the agricultural mechanization technology, especially radish harvester, because radish harvester of pulling type is directly contacted with soil during harvesting. Then, strength analysis of harvesting part is needed. In this study, finite element analysis was carried out using ANSYS Workbench in order to find out the weak point of the harvesting part of the harvester. The 3D model of the harvesting part including driving pulleys, shafts, and V-belts was designed by using CATIA V5 R18. The maximum load of 16.82 Nm measured in the field test was input to the driving shaft. The driving pulleys, shafts, and V-belts were simulated, and analyzed the deformation and equivalent stress. Simulation results revealed the maximum deformation and equivalent stress on the driving shaft. The results showed that the driving shaft of the radish harvester is the weakest point. Thus, the simulation results should be sufficiently considered during the design of the driving part of the harvesting part.