• The Transactions of the Korea Information Processing Society
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• v.4 no.8
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• pp.1948-1960
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• 1997

Quality of a new system is closly related to the quality of components in reuse repository. Quality assessment is essential to construct a reuse library. Definition of quality and method of assessment are totally different in reuse environments. User interface, functionality, performance are main factor in non-reuse development environment. However, reuse environment needs more reusability, extensibility, generality, and maintainability in quality assessment. This paper describes a development of quality assessment tool for multimedia object reuse conponents. Tool gets reuse components described by C++ or IDL, and analyses style, structure, coupling, strength, complexity, understandability, etc. Ultimatly the tool generate quality satisfaction degree for reuse programmers. Quality assessment services are supported in distributed object architecture, CORBA.

• Journal of KIISE:Software and Applications
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• v.34 no.4
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• pp.303-316
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• 2007

Even though many approaches for reuse have been introduced, software engineers are still hesitating to reuse existing software components. Among various reasons for the phenomena, the most significant one is that existing approaches failed to give substantial benefit for the reduction of developers' effort in reusing software assets. To solve this problem, we introduce a custom reuse model utilizing diverse aspects of components specified by RAS and services oriented architecture. We also carried out a case study to demonstrate its feasibility and evaluated it by comparing it to an existing code-based software reuse process. The proposed reuse model helps in the reduction of effort in reusing existing components by decreasing the time for searching and understanding them. Compared to other approaches such as product line engineering, our approach for software reuse using MPC does not require much initial work for implementing the reuse model in different projects. It is of interest to software engineers who are worried about heavy investment, which can cause the delay in their usual development work. Furthermore, the proposed reuse model is not mutually exclusive with other approaches for software reuse such as CBSD or product line engineering. It can accelerate the benefits gained from them.

• The Transactions of the Korea Information Processing Society
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• v.4 no.1
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• pp.97-106
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• 1997

Software reuse techniques make reapplication of various well-organized information knowledge to system development so that improve productivity and make it easy to maintain software. This paper describes the design and implementation of CSORUS(C and C++ SOurce ReUse System) which can extract reuse components using reverse engineering, and store, retrieve, merge them written with C of C++ programming language. The construction components using reverse engineering has advantage in quality assurance because they are reliable components already tested in real environments.

• KIISE Transactions on Computing Practices
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• v.23 no.9
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• pp.535-541
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• 2017

Today, the scale of the computer software market has increased, and massive sized software has been developed to satisfy diverse requirements. In this context, software complexity is increasing and the quality of software is becoming more difficult to manage. In particular, software reuse is important for the improvement of the environments of legacy systems and new system development. In this paper, we propose a method to reuse modules that are certified by quality. Reusable levels are divided into code area (method, class, and component), project domain, and business levels. Based on the coupling and cohesion of software complexity, we propose a reusable module extraction mechanism with reusability metrics, which constructs a visualization of the "reusable module's chunk" based on the method and class levels. By applying reverse engineering to legacy projects, it is possible to identify reusable modules/objects/chunks. If these modules/objects/chunks are to be reused to develop an extension system or similar new system, we need to ensure software reliability in order to reduce the time and cost of software development.

• The Journal of the Korean dental association
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• v.43 no.9 s.436
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• pp.576-581
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• 2005

오늘날 알지네이트 인상재는 다른 어떠한 인상재보다 널리 사용되고 있다. 이는 알지네이트 인상재가 ①사용하기 쉽고, ②환자에게 거부감이 적고, ③특수한 장비의 사용이 필요하지 않으며, ④정확히 사용하면 상당히 정밀한 인상이 가능하기 때문이다. 알지네이트 인상재의 정확한 사용법을 정리한다.

• Proceedings of the Korea Society for Simulation Conference
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• 1999.04a
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• pp.227-231
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• 1999

디자인 패턴은 소프트웨어 -특히, 객체지향 소프트웨어- 의 개발시 재 사용성을 높기 위해서 사용되며, 이는 상속(Inheritance)과 같은 코드레벨 재사용 (code reuse) 보다 높은 레벨의 디자인 재사용 (design reuse)을 가능하게 한다. 디자인 패턴은 구체적인 문제에 대해 구체적인 해를 제공하는 cookbook과는 달리, 추상적인 문제에 대해 추상적인 해를 제시함으로써, 비슷한 부류의 문제에 적용할 수 있으므로 높은 재 사용성을 보장한다. 본 논문은 Retargetable한 특성을 갖는 Instruction set simulator의 개발에 디자인 패턴을 적용한 예를 보여줌으로써, 재 사용성 및 확장성을 높이는 방안을 소개한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.275-278
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• 2017

과거의 가장 흔한 공격이었던 코드 삽입 공격은 방어 기법이 발전함에 따라 점점 어려워지고 있다. 공격자는 코드를 삽입하지 않고도 공격할 수 있는 방법을 찾기 시작하였고, 공격 대상에 존재하는 코드를 연결하여 원하는 동작을 실행하게 만드는 코드 재사용 공격을 하기 시작했다. 코드 재사용 공격을 막는 방어 기법 역시 제안되었지만, 다시 이를 우회하는 발전된 코드 재사용 공격들도 나오면서 공격과 방어를 거듭하고 있다. 본 논문에서는 코드 재사용 공격의 전신인 return into libc 부터 Data Oriented Programming (DOP)까지의 공격과 방어를 정리하고, 코드 재사용 공격이 발전되는 과정을 살펴보는 것을 목표로 한다.

• Journal of Digital Convergence
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• v.11 no.10
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• pp.737-746
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• 2013

This research aim is to investigate the rate and pattern of re-using the four-digit personal identification numbers(PINs). 1313 types of PINs were observed by 224 students who took this author's classes from last 2006 to 2011 at A-university. Some students used PINs as few as 3-4 and as many as 12-13. The average is 5.86 per person. The rates of re-using PINs were calculated by each student. 87%(195/224) of students reused PINs and 64% of them reused with just only one type of PINs, 20% reused with 2 types, and about 3% reused with 3-4 types. With respect to PINs, 884 out of the total 1313 PINs were reused, that is around 64.3%. In a broad sense, a pair of slight modification of PINs were also observed, that is, new PINs were partly matched in position or size of numbers of previous PINs. And if the reuse rate falling under the slight modification of PINs, 10.4% is added, about 75% of the PINs were reused in a broad sense. The re-using rate of male students is higher than the one of female students. This paper's results may provide to make plan for hacks of passwords.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.45 no.12
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• pp.1069-1075
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• 2017

With the recent development of space technology, the satellite market, especially the small satellite market, is growing globally. As the satellite market continues to grow, the launch vehicle market is also growing, and demand for low-cost launches is increasing. There are a number of options for low-cost launches, including development of engine that uses low-cost propellants, product and transportation cost savings, but the most effective way to reduce launch costs is to reuse the used launch vehicles. USA's Space Shuttle, a famous rocket as manned spacecraft, could be referred as the start of reusable launch vehicle. However, Space Shuttle had limited reusable parts and it was very expensive even though it is a reusable launch vehicle because of its low efficiency. In recent years, aiming at a real reusable launch vehicle, reusable launch vehicle for commercial purposes have been developed around USA's SpaceX and Blue Origin, and re-landing tests were successfully accomplished. In addition, SpaceX successfully did the re-using of first-stage launch vehicle that had been succeeded in re-landing already. In accordance with this trend, countries such as Europe and India are also concentrating on the study of reusable launch vehicles. Including Blue Origin, companies like Virgin Galactic and XCOR in the United States, are also trying to commercialize the same reusable technology as the private manned space tourism. Confirmation of these technology trends is essential, because the re-use technology could change the landscape of the global launch vehicle market.

• The KIPS Transactions:PartD
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• v.14D no.6
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• pp.665-674
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• 2007

Code reuse in software reuse has several limitations such as difficulties of understanding and retrieval of the reuse code written by other developers. To overcome these problems, it should be possible to reuse the analysis/design information than source code itself. Therefore, this paper present analogical matching techniques for the reuse of object models and patterns. And this paper have suggested the object model and the design patterns as reusable components and the representation techniques to store them. Namely, the contents of the paper are as follows. Analogical matching functions to retrieve analogous components from reusable libraries. And the representation of reusable components to be stored in the library in order to support the analogical matching.