• 한국정보과학회논문지:소프트웨어및응용
• /
• 제34권4호
• /
• pp.303-316
• /
• 2007

소프트웨어 재사용을 위해 여러 가지의 접근법이 제시되어 왔으나，소프트웨어 개발자들은 이미 개발된 소프트웨어 컴포넌트를 재사용하는데 있어서 여전히 회의적이다. 여러 가지 원인이 있겠으나，기존의 재사용 접근법들이 개발자들이 재사용에 기울이는 노력을 감소시키는데 실질적인 도움을 주지는 못한 것이 가장 큰 원인 중 하나라고 볼 수 있다. 이러한 문제점 해결을 위해 본 논문에서는 RAS기반의 명세를 중심으로 컴포넌트의 다양한 측면을 활용하는 재사용 모델을 제시한다. 제시된 재사용 모델의 실용성 검증을 위해 실제적인 사례연구를 진행하였으며, 기존의 소스코드 기반의 소프트웨어 재사용 프로세스와 비교한 실험을 통해 재사용의 효율성 증가를 검증하였다. 이러한 검증을 통해，제안된 재사용 모델이 이미 개발된 기존 컴포넌트를 개발자들이 검색하고 이해하는데 소요되었던 시간을 감소시킴으로써 전반적인 재사용 소요비용 감소시키고 있음을 확인할 수 있었으며，제품라인공학과 같은 접근방법과 비교하여 일상적인 개발 공정의 지연을 초래할 수 있는 초기 투자비용을 최소화함에 따라，자발적인 개발자들의 참여를 끌어낼 수 있다는 점에서 차별성을 찾을 수 있다. 뿐만 아니라, 제안된 재사용 모델은 컴포넌트 기반 개발 방법론이나 제품라인공학과 같은 기존의 재사용 방법들과 배타적인 개념이 아니므로，필요에 따라 함께 적용하여 재사용 효과를 배가시킬 수 있을 것으로 기대한다.

• 대한환경공학회지
• /
• 제32권5호
• /
• pp.499-508
• /
• 2010

이 연구에서는 피해산정형 모델에 기초하여 제품 환경성 관련 정보를 국내 지리적, 환경적, 사회적 특성을 최대한 반영하여 '화폐가치'로 나타낼 수 있는 전과정 영향평가 지표를 제시하였다. 먼저 평가단계를 '특성화', '피해평가', 통합화의 3단계로 구분하였으며, 자원소비, 지구온난화, 오존층영향, 산성화, 부영양화 및 광화학산화물 생성의 6대 영향범주를 고려하였다. 아울러 6대 영향범주와 관련된 16개 범주별 종말점과 4대 보호대상에 대한 피해함수 및 피해계수를 도출하였다. 최종적으로 도출된 영향범주별 기준물질의 통합화 지수는 21.8원/kg Sb, 6.19원/kg $CO_2$, 53,000원/kg CFC-11, 13,100원/kg $SO_2$, 2,310원/kg ${PO_4}^{3-}$, 3,030원/kg $C_2H_4$로 나타났다. 이 연구결과를 활용하여 제품 전과정에 걸쳐 발생하는 환경부하가 보호대상에 미치는 영향을 화폐가치로 단일 지수화할 수 있으므로 도출되는 전과정 영향평가 결과의 이해도와 활용도를 높일 수 있다.

• 경영정보학연구
• /
• 제14권2호
• /
• pp.117-140
• /
• 2012

공공분야 신규 서비스 모델의 평가는 성과가 도출되지 않은 상태에서 진행해야 한다는 점에서 그 어려움이 크므로, 산업 육성 및 경제 활성화를 위한 공공 지원사업의 성과를 높일 수 있는 합리적인 평가체계가 필요하다. 본 연구의 목적은 공공기관에서 지원하는 사업의 선정평가 프레임워크를 개발함으로써 보다 합리적인 공공 지원사업 평가체계를 제시하고, 개발된 평가체계를 최근 많은 관심을 받고 있는 모바일 앱 서비스 사업에 적용해 봄으로써 그 활용가능성을 타진해 보는 것이다. 기존 관련 문헌연구와 현재 활용되고 있는 평가체계를 바탕으로 평가항목을 발굴하고, 전문가그룹의 인터뷰와 계층적 분석방법(AHP)을 통해 평가지표 및 가중치를 산정하여 선정평가 프레임워크를 개발하였다. 모바일 앱 서비스 지원사업에 적용할 새로운 평가체계를 위한 평가항목으로 시장지향성, 기술지향성, 서비스 개발역량, 정책지향성을 도출하였고, 각각 세부 평가지표를 발굴함으로써 평가체계를 구성하였다. 앱 개발을 통한 사업화 성과 달성을 목표로 하는 사업의 특성상 응답자들은 평가항목 중 시장지향성을 가장 중요하게 생각했고, 평가지표 중에서는 목표시장과 고객, 수익구조와 경제성 등을 우선순위로 꼽았다. 또한, 이를 활용하여 기존 평가 체계에 의한 앱 개발 지원사업의 재평가를 실시함으로써 실제 기업의 성과 창출에 더 적합한 평가 모델로서의 가능성을 살펴보았고, 본 연구에서 제시한 평가체계가 실제 기업의 성과와 보다 유사한 것으로 나타났다. 연구 결과, 실제 공공기관 지원사업의 선정평가에 적용할 수 있는 평가체계로서의 가능성을 확인했으며, 이를 통해 보다 경쟁력 있는 기업의 과제를 선정함으로써 사업의 목표를 달성하고 성과를 제고할 수 있을 것으로 기대된다. 이와 유사한 지원사업 및 과제에도 적용하여 기업의 프로젝트 수행능력을 배양하고, 공공 지원사업을 통한 산업의 육성과 정책적 성과 제고에 기여할 수 있는 시사점을 도출했다는데 본 연구의 의의가 있다.

• International journal of advanced smart convergence
• /
• 제8권4호
• /
• pp.188-193
• /
• 2019

This paper is about environment-based low-code and no-code execution platform and execution method that combines hybrid and native apps. In detail, this paper describes the Low-Code/No-Code execution structure that combines the advantages of hybrid and native apps. It supports the iPhone and Android phones simultaneously, supports various templates, and avoids developer-oriented development methods based on the production process of coding-free apps and the produced apps play the role of Java virtual machine (VM). The Low-Code /No-Code (LCNC) development platform is a visual integrated development environment that allows non-technical developers to drag and drop application components to develop mobile or web applications. It provides the functions to manage dependencies that are packaged into small modules such as widgets and dynamically loads when needed, to apply model-view-controller (MVC) pattern, and to handle document object model (DOM). In the Low-Code/No-Code system, the widget calls the AppOS API provided by the UCMS platform to deliver the necessary requests to AppOS. The AppOS API provides authentication/authorization, online to offline (O2O), commerce, messaging, social publishing, and vision. It includes providing the functionality of vision.

• 드라이브 ㆍ 컨트롤
• /
• 제13권4호
• /
• pp.23-30
• /
• 2016

This paper presents a control-oriented dynamical model of a towing rope system with variable-length. In this system, a winch driven by a motor's torque uses the towing rope to pull a cart. In general, it is a difficult and complicated process to obtain an accurate mathematical model for this system. In particular, if the rope length is varied by operating the winch, the varying rope dynamics needs to be considered, and the key physical parameters need to be re-identified... However, real time parameter identification requires long computation time for the control scheme, and hence undesirable control performance. Therefore, in this article, the rope is modeled as a straight massless segment, with the mass of rope being considered partly with that of the cart, and partly as halfway to the winch. In addition, the changing spring constant and damping constant of the towing rope are accounted for as part of the dynamics of the winch. Finally, a reduced-order observer-based servomechanism controller is designed for the system, and the performance is evaluated by computer simulation.

• Journal of Magnetics
• /
• 제9권2호
• /
• pp.60-64
• /
• 2004

In this paper calculations of magnetisation and magnetoresistance characteristics of the Spin Valve (SV) and Pseudo Spin Valve (PSV) spintronics structures are reported and compared with the experimental data. The magnetisation reversal process was analysed with respect to the Stoner- Wohlfahrt model of total surface energy in terms of uniaxial anisotropy, exchange coupling between ferromagnetic layers, unidirectional exchange anisotropy of pinned layer (modelled by exchange coupling between magnetisation of pinned layer and net magnetisation of antiferromagnetic layer with high anisotropy). The numerical simulation of the model to the experimental magnetisation data yielded the above parameters for SV and PSV structures. These parameters were used to more sophistically micromagnetic modelling tool originating from the project called Object Oriented Micromagnetic Framework. Influence of the shape anisotropy of the Magnetic Tunnelling Junction cell used in MRAM was simulated by means of micromagnetic simulations. Results were compared to those obtained from the spot Kerr measurements.

• 한국시스템다이내믹스연구
• /
• 제2권1호
• /
• pp.69-92
• /
• 2001

The Managing and measuring performance have long been a popular topic in business. Traditions of financially-oriented managing and measuring performance have provided managers with relatively objective and scientific results of measuring performance until now. But today the value of organization is influenced more by intangible assets than tangible assets. Nobody thus believes that the performance and the value of organization can be measured by financial indicators only. In this background, numerous researches have been conducted to find alternatives to measuring the value of organization's intangible assets. One of the remarkable achievements would be "Balanced Score Card (BSC), "which covers three sectors of indicators, each from customer relations, internal process innovations, and learning and human resource development, in addition to traditional financial indicators. Unfortunately, even BSC, let alone others, fails to accomodate all performance indicators as a holistic system. Namely, performance measuring techniques including BCS, at present, fail to reflect the dynamic features in their model - i.e., the casual relations and the interactions between the indicators, and there is no way of taking into account the impact of delayed feedback which flows from introduction of new policy and legislative changes, etc. Therefore, this paper attempts to devise a means for adding dynamic features to BSC, by introducing the system dynamics concept, with a focus on the effect of casual relations and feedback structure.

• 한국CDE학회논문집
• /
• 제19권3호
• /
• pp.253-262
• /
• 2014

3D city model, which consisted of the 3D building models and their geospatial position and orientation, is becoming a valuable resource in virtual reality, navigation systems, civil engineering, etc. The purpose of this research is to propose the new framework to generate the 3D city model that satisfies visual and physical requirements in ground oriented simulation system. At the same time, the framework should meet the demand of the automatic creation and cost-effectiveness, which facilitates the usability of the proposed approach. To do that, I suggest the framework that leverages the mobile mapping system which automatically gathers high resolution images and supplement sensor information like position and direction of the image. And to resolve the problem from the sensor noise and a large number of the occlusions, the fusion of digital map data will be used. This paper describes the overall framework with major process and the recommended or demanded techniques for each processing step.

• 경영과학
• /
• 제21권2호
• /
• pp.61-77
• /
• 2004

As various methodologies for business process analysis and design have been conducted in many organizations by their own ways, those methodologies are not compatible each other. In order to reduce the cost of analysis for organizations. some mapping methods between different methodologies need to be developed. UMM(UN/CEFACT Modeling Methodology) that has an object-oriented point of view. can overcome the limits of existing bottom-up approaches and make it reasonable. It also simplifies the business and administrative procedures. IDEF( Integrated Definition Language) with a structural point of view that has been widely used as a system analysis and design method, needs to be mapped to UMM in order to reuse the existing IDEF models. In this study, we propose a guideline that deals with procedures of utilizing IDEF models from which we want to derive the UMM models for developing an electronic commerce system including electronic documents exchange. By comparing IDEF and UMM, we analyze the differences between those two methodologies. Based on these differences. we suggest the basic strategies for mapping method from IDEF to UMM. We also propose a mapping guideline that can make UMM results from the modeling results of IDEF. We can take an advantage of the existing IDEF analysis design results when we adopt UMM methodology for electronic business system. Many analysts who are familiar with the IDEF methodology can develop UMM work-flow by utilizing their existing results and skills.

• 한국초등과학교육학회지:초등과학교육
• /
• 제39권1호
• /
• pp.84-99
• /
• 2020

The purpose of this study is to develop a STEAM program using technological pedagogical and content knowledge (TPACK) model to effectively utilize technology to solve the difficulties in the teaching of 'structure and function of our body' unit in the primary science curriculum and to confirm the effect on the academic achievement, creative problem solving ability and scientific interests of elementary students. The program was developed as the STEAM program of the 8th class by utilizing the construction knowledge of the TPACK model. The developed program was applied to 29 experimental group students in 5th grade. And the textbook-oriented circulatory system learning program was applied to 29 5th graders in the same school. As a result of the application of the program, the experimental group showed significant improvement over the comparison group in its creative problem solving ability and scientific interests, and the satisfaction of the class was also high. This caused a positive effect on students because the process of self-directing information about the circulatory system using smart devices, making outputs creatively using 3D printers, and presenting them through role play using produced outputs.