• 한국산업정보학회논문지
• /
• 제19권2호
• /
• pp.51-58
• /
• 2014

As WSNs(Wireless Sensor Networks) are being deployed widely in diverse application areas, their management and maintenance become more important. Recent sensor node software takes modular software architectures in pursuit of flexible software management and energy efficient reprogramming. To realize an flexible and efficient modular architecture particularly on resource constrained mote-class sensor nodes that are implemented with MCUs(Micro-Controller Units) of a single address space. an appropriate module linking model is essential to resolve and bind the inter-module global symbols. This paper identifies a design space of module linking model and respectively their implementation frameworks. We then establish a taxonomy for module linking models by exploring the design space of module linking models. Finally, we suggest an implementation framework respectively for each module linking model in the taxonomy. We expect that this work lays the foundations for systematic innovation toward more flexible and efficient modular software architectures for WSNs.

• 한국정보처리학회논문지
• /
• 제7권5호
• /
• pp.1377-1387
• /
• 2000

Many companies are investing in the development of the PDM(Prodct Data Management) system to improve the productivities of manufacturing since people believe that PDM technology can give a new solution from planning to development. As the requirements of PDM grows, so many industries sped their own budget on developing common requirements and functionalities. In this paper, we describe the framework for a PDM application to promote reuse in a PDM system development area. However, developing the framework is not easy. In this paper, the current state and results of our development are described: 1) the phases of developing our framework, 2) abstruction strategies, 3) programing model based on repository. Although frameworks improve software reuse, frameworks are so large and complex that application developers require to understand framework in order to customize the framework. To support the customization of framework, development environment is developed, also.

• 한국융합학회논문지
• /
• 제9권8호
• /
• pp.17-24
• /
• 2018

설계 패턴은 소프트웨어 개발 시 반복적으로 발생하는 특정 문제들에 대한 효과적인 해결책을 제공하는 소프트웨어 재사용 기술이다. 특히, 객체지향 설계 패턴들은 다양한 플랫폼이나 프레임워크에 포함되어 소프트웨어 생산성을 높이고 있다. 본 논문은 설계 패턴을 고려한 안드로이드 모바일 플랫폼 기반의 게임 프로그래밍에 대한 지침을 제공한다. 적절히 설계 패턴을 활용함으로써 소프트웨어 개발 생산성뿐만 아니라, 개발 후 유지보수를 위해서도 효과적일 수 있다. 본 논문은 안드로이드 플랫폼 기반의 게임 프로그래밍에 설계 패턴을 적용하기 위한 지침과 사례를 제공한다. MVP, Singleton, Observer, State 설계 패턴과 같은 대표적인 객체지향 설계 패턴을 안드로이드 게임 프로그램 개발에 적용한다.

• The Journal of Advanced Prosthodontics
• /
• 제9권6호
• /
• pp.463-469
• /
• 2017

PURPOSE. To evaluate the fit of a three-unit metal framework of fixed dental prostheses made by subtractive and additive manufacturing. MATERIALS AND METHODS. One master model of metal was fabricated. Twenty silicone impressions were made on the master die, working die of 10 poured with Type 4 stone, and working die of 10 made of scannable stone. Ten three-unit wax frameworks were fabricated by wax-up from Type IV working die. Stereolithography files of 10 three-unit frameworks were obtained using a model scanner and three-dimensional design software on a scannable working die. The three-unit wax framework was fabricated using subtractive manufacturing (SM) by applying the prepared stereolithography file, and the resin framework was fabricated by additive manufacturing (AM); both used metal alloy castings for metal frameworks. Marginal and internal gap were measured using silicone replica technique and digital microscope. Measurement data were analyzed by Kruskal-Wallis H test and Mann-Whitney U-test (${\alpha}=.05$). RESULTS. The lowest and highest gaps between premolar and molar margins were in the SM group and the AM group, respectively. There was a statistically significant difference in the marginal gap among the 3 groups (P<.001). In the marginal area where pontic was present, the largest gap was $149.39{\pm}42.30{\mu}m$ in the AM group, and the lowest gap was $24.40{\pm}11.92{\mu}m$ in the SM group. CONCLUSION. Three-unit metal frameworks made by subtractive manufacturing are clinically applicable. However, additive manufacturing requires more research to be applied clinically.

• The Journal of Advanced Prosthodontics
• /
• 제9권4호
• /
• pp.239-243
• /
• 2017

PURPOSE. The purpose of this study is to compare single and three-unit metal frameworks that are produced by micro-stereolithography. MATERIALS AND METHODS. Silicone impressions of a selected molar and a premolar were used to make master abutments that were scanned into a stereolithography file. The file was processed with computer aided design software to create single and three-unit designs from which resin frameworks were created using micro-stereolithography. These resin frameworks were subjected to investment, burnout, and casting to fabricate single and three-unit metal ones that were measured under a digital microscope by using the silicone replica technique. The measurements were verified by means of the Mann-Whitney U test (${\alpha}=.05$). RESULTS. The marginal gap was $101.9{\pm}53.4{\mu}m$ for SM group and $104.3{\pm}62.9{\mu}m$ for TUM group. The measurement of non-pontics in a single metal framework was $93.6{\pm}43.9{\mu}m$, and that of non-pontics in a three-unit metal framework was $64.9{\pm}46.5{\mu}m$. The dimension of pontics in a single metal framework was $110.2{\pm}61.4{\mu}m$, and that of pontics in a three-unit metal framework was $143.7{\pm}51.8{\mu}m$. CONCLUSION. The marginal gap was smaller for the single metal framework than for the three-unit one, which requires further improvement before it can be used for clinical purposes.

• Communications for Statistical Applications and Methods
• /
• 제15권6호
• /
• pp.875-881
• /
• 2008

This paper first discusses the existing non-homogeneous Poisson process(NHPP) software reliability growth model(SRGM) frameworks with respect to capability of representing software reliability growth phenomenon. As an enhancement of representational capability a new general coverage-based NHPP SRGM framework is developed. Issues associated with application of the new framework are then considered.

• 한국정보시스템학회지:정보시스템연구
• /
• 제22권4호
• /
• pp.23-48
• /
• 2013

This study shows that a sustainable competitive advantage and entrepreneurial characteristics are necessary for a software company to achieve competitive innovation and growth. This study investigates various software company characteristics and the effects of various company factors as its main research objectives. The data used in this research model were collected from software companies in South Korea. A total of 211 questionnaires were collected over a period of two months in 2013. EXCEL, AMOS, and SPSS were used to derive the study results. The hypothesis testing results of this study are as follows. First, a software company's entrepreneurial innovativeness and risk-taking behaviors have a positive influence on software innovativeness. A greater sense of innovativeness and entrepreneurial orientation leads to a higher propensity to take risks in software development. Second, the characteristics of software innovativeness, and flexibility have a significant influence on software company performance. Innovation during the initial periods of software usage can create a high demand for improvements and new features, requiring a flexible software design. Finally, this study analyzes the software features of entrepreneurial characteristics and the influence of institutional factors on the characteristics of individual innovativeness and software development. Entrepreneurial characteristics can affect governmental or institutional support, policies, and legal frameworks to promote the role of software innovativeness. The results of this study imply that software companies can adopt an entrepreneurial approach to promote technology development and product development for achieving a competitive advantage in the industry. This study also analyzes the environmental factors that affect the software industry and their implications for policy makers.

• 지능정보연구
• /
• 제23권2호
• /
• pp.1-17
• /
• 2017

딥러닝 프레임워크의 대표적인 기능으로는 '자동미분'과 'GPU의 활용' 등을 들 수 있다. 본 논문은 파이썬의 라이브러리 형태로 사용 가능한 프레임워크 중에서 구글의 텐서플로와 마이크로소프트의 CNTK, 그리고 텐서플로의 원조라고 할 수 있는 티아노를 비교하였다. 본문에서는 자동미분의 개념과 GPU의 활용형태를 간단히 설명하고, 그 다음에 logistic regression을 실행하는 예를 통하여 각 프레임워크의 문법을 알아본 뒤에, 마지막으로 대표적인 딥러닝 응용인 CNN의 예제를 실행시켜보고 코딩의 편의성과 실행속도 등을 확인해 보았다. 그 결과, 편의성의 관점에서 보면 티아노가 가장 코딩 하기가 어렵고, CNTK와 텐서플로는 많은 부분이 비슷하게 추상화 되어 있어서 코딩이 비슷하지만 가중치와 편향을 직접 정의하느냐의 여부에서 차이를 보였다. 그리고 각 프레임워크의 실행속도에 대한 평가는 '큰 차이는 없다'는 것이다. 텐서플로는 티아노에 비하여 속도가 느리다는 평가가 있어왔는데, 본 연구의 실험에 의하면, 비록 CNN 모형에 국한되었지만, 텐서플로가 아주 조금이지만 빠른 것으로 나타났다. CNTK의 경우에도, 비록 실험환경이 달랐지만, 실험환경의 차이에 의한 속도의 차이의 편차범위 이내에 있는 것으로 판단이 되었다. 본 연구에서는 세 종류의 딥러닝 프레임워크만을 살펴보았는데, 위키피디아에 따르면 딥러닝 프레임워크의 종류는 12가지가 있으며, 각 프레임워크의 특징을 15가지 속성으로 구분하여 차이를 특정하고 있다. 그 많은 속성 중에서 사용자의 입장에서 볼 때 중요한 속성은 어떤 언어(파이썬, C++, Java, 등)로 사용가능한지, 어떤 딥러닝 모형에 대한 라이브러리가 잘 구현되어 있는지 등일 것이다. 그리고 사용자가 대규모의 딥러닝 모형을 구축한다면, 다중 GPU 혹은 다중 서버를 지원하는지의 여부도 중요할 것이다. 또한 딥러닝 모형을 처음 학습하는 경우에는 사용설명서가 많은지 예제 프로그램이 많은지 여부도 중요한 기준이 될 것이다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2014년도 춘계학술대회
• /
• pp.238-240
• /
• 2014

클라우드 컴퓨팅은 소프트웨어를 서비스로서 사용할 수 있도록 하는 SaaS 프레임워크를 포함한다. 기존의 서비스가 있음에도 테넌트와 용도의 차이에 따라 서비스 제공자가 서비스를 다시 구축한다면 비용이나 관리적 측면에서 많은 자원을 요구하게 된다. 이에 우리는 기존 소프트웨어를 재사용 할 수 있도록 프로세스 알제브라를 이용하여 분석하는 기법을 제안한다. process algebra는 소프트웨어의 구조를 분석하고, 이를 비즈니스 프로세스나 다른 언어로 표현할 수 있으며, 재사용할 수 있는지 검증할 수 있다. process algebra 중 CCS(Calculus of Communicating Systems)는 비즈니스 프로세스나 XML로 변환하기 유용하므로, 이를 이용하여 프로세스를 구조화하고, 구조화된 명세를 비교 및 관리를 위한 메타 저장소를 제안한다.

• 한국전자거래학회:학술대회논문집
• /
• 한국전자거래학회 1999년도 학술대회지 vol.2
• /
• pp.431-445
• /
• 1999

This paper introduces a development of component based framework of supply-chain management. The existing legacy system, which is not designed for object-oriented paradigm, is re-modeled using unified modeling language. Components are extracted from the legacy application, and frameworks are also designed in order to increase productivities of software development. Design issues concerning component and framework development are discussed with real situation. Performance and development productivity issue are also discussed with discussing component size and scope. A real case is presented in connection with the discussed issues.