• International Journal of Computer Science & Network Security
• /
• 제21권12spc호
• /
• pp.375-382
• /
• 2021

The paper introduces a model for evaluating and prioritizing mobile quality attributes and refactoring techniques through the examination of their effectiveness during the mobile application development process. The astonishing evolution of software and hardware has increased the demand for techniques and best practices to overcome the many challenges related to mobile devices, such as those concerning device storage, network bandwidth, and energy consumption. A number of studies have investigated the influence of refactoring, leading to the enhancement of mobile applications and the overcoming of code issues as well as hardware issues. Furthermore, rapid and continuous mobile developments make it necessary for teams to apply effective techniques to produce reliable mobile applications and reduce time to market. Thus, we investigated the influence of various refactoring techniques on mobile applications to understand their effectiveness in terms of quality attributes. First, we extracted the most important mobile refactoring techniques and a set of quality attributes from the literature. Then, mobile application developers from nine mobile application teams were recruited to evaluate and prioritize these quality attributes and refactoring techniques for their projects. A prioritization-based model is examined that integrates the lightweight multi-criteria decision making method, called the best-worst method, with the process of refactoring within mobile applications. The results prove the applicability and suitability of adopting the model for the mobile development process in order to expedite application production while using well-defined procedures to select the best refactoring techniques. Finally, a variety of quality attributes are shown to be influenced by the adoption of various refactoring techniques.

• 한국멀티미디어학회논문지
• /
• 제20권7호
• /
• pp.1054-1064
• /
• 2017

With the development of cloud computing, internet technology and Internet of Things(IoT), most of applications are being smarter and changing from native application to SaaS (Software as a Service) application. New versatile SaaS applications are being released through various app portals (e.g. appstore, googleplay, T-Store, and so on). However, a user has a difficulty in searching, choosing an suitable application to him. It is also hard for him to know what functions of each SaaS application are useful. He wants to be recommended something inter-operated SaaS service according to his personality and his situation. Therefore, this paper presents a way of making mash-up of SaaS applications in order to provide the most convenient inter-operated SaaS service to user. This paper also presents SaaS Application Mash-up Framework (SAMF), complex context and rule matrix. The proposed SAMF is a main system that totally manage SaaS application mash-up service. Complex context and rule matrix are key components in order to recommend what SaaS applications are needed and how those SaaS applications are inter-operated. The SAMF collects complex contexts (User Description, Status Description, SaaS Service Description) in order to choose which SaaS applications are useful, analyze what functions to use, how to mash-up.

• 정보교육학회논문지
• /
• 제14권3호
• /
• pp.449-459
• /
• 2010

초등학교 도형 학습에 컴퓨터 프로그램을 활용하면 도형에 대한 다양한 조작 기능을 제공하여 학습의 효과를 높일 수 있으며, 탐구적 환경을 조성함으로써 교실 환경의 한계를 극복할 수 있다. 지금까지의 연구는 컴퓨터 프로그램을 활용한 도구들을 개발하였지만 콘텐츠 없이 도구이다. 본 연구는 Van Hieles의 기하 학습수준이론에 기초하여 초등학교 수학과 교육과정의 도형 영역을 분석하고, 초등학생들의 인지 수준에 적합한 도형 학습 문제 해결 도구(Geometry For Kids : GeoKids)를 개발한다. 학생들의 인지 수준을 고려하여 자와 컴퍼스를 대신할 수 있도록 만들었고, 원과 직선을 마우스를 사용하여 쉽게 그릴 수 있고, 보다 정확한 작도를 위하여 점과 원의 경계를 자동으로 인식하도록 구성하였다. 수학과 교육과정의 도형 학습 주제에 따라 GeoKids의 기능을 연계한 학습을 할 수 있다.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제27권5호
• /
• pp.488-498
• /
• 2000

객체지향 방법론들은 이해하기 쉽고 확장성이 우수한 모델을 제공하기 때문에 현재 크고 복잡한 소프트웨어를 개발하기 위해서 널리 사용되고 있다. 객체지향 방법론들을 개발에 적용하기 위해서는, 첫째 개발방법론으로부터 과제 특성에 맞는 개발방법을 구성해야 하며, 둘째 이로부터 개발절차를 구성하여야 한다. 그러나 현재 제시되고 있는 객체지향 방법론들에서는 개발방법과 개발절차를 구성하는 과정을 개발자들의 이해와 직관에 의존하고 있다. 이를 개선하기 위해서 본 연구에서는 변용가능한 객체지향 방법론을 제안함으로써, 개발방법 구성의 문제를 체계적으로 지원하고자 한다. 개발방법의 구성을 체계적으로 지원하기 위하여 본 연구에서는 개발방법 구성의 문제를 계획구성의 문제로 변환하여 계획구성 기법을 적용한다. 계획구성의 과정에서 개발하고자하는 소프트웨어의 구조와 특성을 기술하는 아키텍쳐를 입력으로 받아들여 이에 적합한 개발방법이 계획된다. 아키텍쳐는 소프트웨어 개발과정에서 일관되게 유지되어야 하는 결정들을 기술하기 때문에 이를 중심으로 개발방법을 구성함으로써 소프트웨어의 특성을 효율적으로 반영할 수 있다.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제30권5_6호
• /
• pp.398-413
• /
• 2003

컴포넌트와 재사용의 개념을 함께 가지는 컴포넌트 기반 소프트웨어 개발 방법은 소프트웨어 개발시간과 비용을 줄이고, 생산성을 향상시키는 등의 장점을 가진다 이때 컴포넌트들의 재사용을 체계적으로 지원하기 위해 컴포넌트 기반 소프트웨어 개발 프로세스와 병행한 도메인 분석과 설계 방법이 필요하다. 또한 현재의 도메인 분석, 설계 방법에서 부족한 도메인 내의 공통성과 다양성을 인식하는 과정에 대해 객관적인 분석 제시가 필요하다. 그리고 그 정보를 도메인 모델에 잘 반영시켜 그로부터 도메인 컴포넌트를 추출하고 이를 도메인 아키텍쳐에 명시적으로 나타내는 방법이 필요하다 본 논문에서는 컴포넌트 기반 소프트웨어 개발 시 효율적인 재사용 방안으로 도메인을 체계적으로 정의하고 분석, 설계하는 방법을 제안한다. 도메인 내에서 다시 사용될 수 있는 부분, 즉 공통성을 가진 요소들을 요구사항 분석 단계에서부터 추출하여 이를 계속 유지, 정제시켜가며 각 단계의 산출물에 반영시킨다. 이 과정을 통해 공통성을 가진 형태의 도메인 컴포넌트를 생성해 낼 수 있으며 이를 기반으로 도메인 아키텍처를 설계할 수 있다. 본 논문에서 제시하는 도메인 분석, 설계를 통해 소프트웨어를 재사용(software reuse)할 수 있도록 해 주는 동시에, 재사용 가능한 소프트웨어(reusable software)를 생산할 수 있도록 함으로써 체계적인 재사용의 선순환 관계를 지원하게 된다.

• Korean Journal of Geomatics
• /
• 제5권1호
• /
• pp.43-49
• /
• 2005

It is well known that GPS technique can be used for high accuracy leveling positioning if a precise geoid model is available to use at a surveying point. In this study, KOGD2003 geoid model was developed in and around Korean peninsula and this geoid model could be achieved by combining GPS/leveling data with the formerly developed KOGD2002. To this end, the software for orthometric height obtaining and geodetic datum transformation has been implemented with the visual C++ language, what we called GPS-GeoL v.1.0. In order to evaluate the performance and the accuracy of the software, GPS field tests were carried out in the Korean second-order leveling network over Chollabukdo area. Results of the tests have shown that the mean value of the differences between outputs of the software developed in this research and officially announced orthometric heights by NGII (National Geographic Information Institute) was 0.0221 m and also those of RMS was 0.0332 m. Therefore, it was possible to conclude that the KOGD2003 and GPS-GeoL v.1.0 software could be used to determine orthometric heights for civil construction field applications with cm-level accuracy.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
• /
• pp.509-511
• /
• 2004

This paper outlines the development of image processing system, which will allow the general users in Government and Public organizations easily to use and apply KOMPSAT EOC images in their own business. The system includes an import/export module of EOC image distributed in Hierarchical Data Format (HDF) file and various image processing analysis modules. Especially, the image mosaic and subset functions are designed to use EOC image as an image map, generating the Ortho-image module. To update the various spatial data with EOC image, some essential modules such as change detection by pattern recognition, overlay between images and vector data, and modification of vector data are implemented in the system. The system is developed based on the user request analysis of government agency, and suited for more efficient use of satellite image in public applications. Such system is expected to contribute to practical application of KOMPSAT-2 that will be launched in 2005. Further efforts will be made to accommodate the KOMPSAT -2 MSC data.

• 천문학회보
• /
• 제44권2호
• /
• pp.57.4-57.4
• /
• 2019

BITSE is a project of balloon-borne experiments for a next-generation solar coronagraph developed by a collaboration with KASI and NASA. The coronagraph is built to observe the linearly polarized brightness of solar corona with a polarization camera, a filter wheel, and an aperture door. For the observation, the coronagraph is supported by the power distribution unit (PDU), a pointing system WASP (Wallops Arc-Second Pointer), telemetry & telecommand system SIP (Support Instrument Package) which are developed at NASA's Goddard Space Flight Center, Wallops Flight Facility, and Columbia Scientific Balloon Facility. The BITSE Command and Data Handling (C&DH) system used a cost-off-the-shelf electronics to process all data sent and received by the coronagraph, including the support system operation by RS232/422, USB3, Ethernet, and digital and analog signals. The flight software is developed using the core Flight System (cFS) which is a reusable software framework and set of reusable software applications which take advantage of a rich heritage of successful space mission of NASA. The flight software can process encoding and decoding data, control the subsystems, and provide observation autonomy. We developed a python-based testing framework to improve software reliability. The flight software development is one of the crucial contributions of KASI and an important milestone for the next project which is developing a solar coronagraph to be installed at International Space Station.

• Communications for Statistical Applications and Methods
• /
• 제8권2호
• /
• pp.507-514
• /
• 2001

In recent years, the development and the embodiment of information analysis system has been sprightly carried out in several fields of study. In this study, as and extension of these studies, we develop a system for multivariate analysis which might be widely used in social and natural sciences. This multivariate analysis system is developed by using multivariate analysis procedures in SAS/STAT software. Also, the system supply users with he environment of GUI(Graphical User Interface), which is constructed with AF(application frame) and SCL(screen control language) of SAS software, in order to help users to use the system with easy.

• International Journal of Reliability and Applications
• /
• 제6권2호
• /
• pp.87-99
• /
• 2005

Coverage-based software reliability growth models (SRGMs) have been developed and successfully applied in practice. Performance of a coverage-based SRG M depends on the coverage function employed by the SRGM. When the coverage function represents the coverage growth behavior well irrespective of type of the testing profile the corresponding coverage-based SRGM is expected to be widely applicable. This paper first conducts a study of selecting the most representative coverage functions among the available coverage functions. Then their performances are empirically evaluated and compared. The result provides a foundation for developing widely applicable coverage-based SRGMs and monitoring the progress of a testing process.