• 정보처리학회논문지:소프트웨어 및 데이터공학
• /
• 제2권6호
• /
• pp.377-382
• /
• 2013

제품라인공학 기반의 융합소프트웨어 개발 방법론에서는 어플리케이션 개발을 위해 아키텍처 모델을 제안하고 있다. 그리고 명세를 이용하여 제어컴포넌트를 개발하도록 제안하는데 워크플로우는 트랜잭션을 주로 처리하는 어플리케이션 개발을 위해 제안되었다. 제품라인 공학 기반의 소프트웨어 개발이 효과를 발휘하기 위해서는 도구의 지원이 반드시 필요하다. 하지만 기존의 워크플로우 모델링 도구들은 제품라인 공학개념을 지원하지 않기 때문에 워크플로우 기반의 제품라인 소프트웨어 개발을 지원할 수 있는 도구의 개발이 필요했다. 본 논문에서는 워크플로우 기반의 제품라인 소프트웨어 개발을 지원하기 위해서 개발된 도구를 소개하고 개발된 도구의 활용 가능성을 확인하기 위해서 간단한 활용예제를 소개한다.

• 한국컴퓨터정보학회논문지
• /
• 제9권3호
• /
• pp.1-6
• /
• 2004

객체 모델링 기법의 그래픽 표현을 이용하여 자료의 추상화, 캡슐화, 모듈화, 계층화 할 수 있는 새로운 그래픽 정보시스템 개발 기술이 절실히 필요하다. 그래픽 자료의 추상화 방법을 개선하기 위하여 복합객체 기술로 자료의 추상화와 계층화 개념을 기반으로 모델링하였으며, 메쉬, 레이어, 세그먼트, 인스턴스 등과 같은 여러 가지 도형요소의 클래스들을 지원하는 분류화와 다중상속 관계모델을 제안한다. 객체 모델링 기법과 스파이스 참조 모델을 이용하여 간단한 그래픽 정보시스템 개발사례를 통하여 소프트웨어 개발주기와 소프트웨어 유지보수 비용을 줄일 수 있는 요구사항을 지원하는 객체 표현 방법의 데이터 모델링 기법을 비교하고 평가한다.

• The Journal of Advanced Prosthodontics
• /
• 제8권3호
• /
• pp.219-223
• /
• 2016

PURPOSE. This study aimed to create a digitized database of fabricated obturators to be kept for patients' potential emergency needs. MATERIALS AND METHODS. A chairside intraoral scanner was used to scan the surfaces of an acrylic resin obturator. The scanned data was recorded and saved as a single standard tessellation language file using a three-dimensional modeling software. A simulated obturator model was manufactured using fused deposition modeling technique in a three-dimensional printer. RESULTS. The entire obturator was successfully scanned regardless of its structural complexity, modeled as three-dimensional data, and stored in the digital system of our clinic at a relatively small size (19.6 MB). A simulated obturator model was then accurately manufactured from these data. CONCLUSION. This study provides a proof-of-concept for the use of digital technology to create a digitized database of obturators for edentulous maxillectomy patients.

• International Journal of Aeronautical and Space Sciences
• /
• 제17권1호
• /
• pp.29-36
• /
• 2016

Tensairity girder is a light weight inflatable fabric structural concept which can be used in road emergency transportation. It uses low pressure air to stabilize compression elements against buckling. With the purpose of obtaining the comprehensive target of minimum deflection and weight under ultimate load, the cross-section and the inner pressure of tensairity girder was optimized in this paper. The Variable Complexity Modeling (VCM) method was used in this paper combining the Kriging approximate method with the Finite Element Analysis (FEA) method, which was implemented by ABAQUS. In the Kriging method, the sample points of the surrogate model were outlined by Design of Experiment (DOE) technique based on Optimal Latin Hypercube. The optimization framework was constructed in iSIGHT with a global optimization method, Multi-Island Genetic Algorithm (MIGA), followed by a local optimization method, Sequential Quadratic Program (SQP). The result of the optimization gives a prominent conceptual design of the tensairity girder, which approves the solution architecture of VCM is feasible and efficient. Furthermore, a useful trend of sensitivity between optimization variables and responses was performed to guide future design. It was proved that the inner pressure is the key parameter to balance the maximum Von Mises stress and deflection on tensairity girder, and the parameters of cross section impact the mass of tensairity girder obviously.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2007년도 추계학술대회논문집
• /
• pp.1329-1332
• /
• 2007

In this study, the design method of flexible wing model for gust response measurement wind tunnel test was presented. The design concept proposed herein was validated by modal testing of the flexible wing model manufactured. In addition, aeroservoelastic modeling method for flexible wing model was presented and validated by comparing the gust response analysis results from the method proposed herein with those of commercial software. The gust response characteristics of the flexible wing model was studied by wind tunnel test for measuring the flexible wing gust response due to the induced gust excitation by gust generator. The aeroservoelastic modeling methods proposed and the wind tunnel test results obtained in this study can be applied for wind tunnel testing of the flexible wing for gust response alleviation.

• 한국정밀공학회지
• /
• 제32권4호
• /
• pp.353-358
• /
• 2015

Energy consumption reduction has become an important key word in manufacturing that can be achieved through the efficient and optimal use of raw materials and natural resources, and minimization of the harmful effects on nature or human society. The successful implementation of this concept can only be possible by considering a product's entire life cycle and even its disposal from the early design stage. To accomplish this idea with milling, minimum quantity lubrication (MQL) strategies and cutting conditions are analyzed through process modeling and experiments. In this study, a model to predict the cutting energy in the milling process is used to find the cutting conditions, which minimize the cutting energy through a Kriging meta-modeling process. The MQL scheme is developed first to reduce the amount of cutting oil and costs used in the cutting process, which is then employed for the entire modeling and experiments.

• 한국CDE학회논문집
• /
• 제13권1호
• /
• pp.36-44
• /
• 2008

This paper proposes a modeling and simulation process of a panel production line (PPL) in a shipyard. The panel production line is an assembly process to produce a main panel of a flat block and a curved block. In this paper, its activity analysis is carried out using expression of IDEF0, and its process is qualitatively and quantitatively analyzed and modeled by Petri Nets. A commercial discrete event simulation tool, $QUEST^{TM}$, is used for virtual PPL and simulation. The modeling results by Petri Net are mapped to elements of the simulation tool. Finally, an integrated simulation environment of PPL is implemented in order to efficiently utilize the virtual PPL model. With the help of IDEF0 and Petri Nets, we could systematically analyze and describe the PPL process that are characterized as being concurrent, asynchronous, distributed, parallel, nondeterministic, and/or stochastic. Also, the dynamic and concurrent activities of a PPL system were able to be simulated. A timing concept can be included into the Petri nets model to evaluate performance and dependability issues of the system.

• 대한산업공학회지
• /
• 제12권1호
• /
• pp.119-131
• /
• 1986

Described in this paper is a modelling methodology for mass production system simulation. The mass production system under consideration consists of various types of flow lines, special purpose production facilities, conveyor lines, palletized carts, and storage facilities. This type of production system is typical in home appliance industry, automobile industry, footwear industry, etc. where a variety of product mix are mass-produced. The modelling methodology is based on the "discrete-event formalism", and an "activity-oriented world view" is adopted to formalize the system description. A distinctive feature of the modelling methodology is that only the static structure (ie, system components) is included in the fixed model. The dynamic structure of the system is specified through a "data-driven" mechanism, which is an extension of the "experimental frame" concept. Each type of system components (ie, flow line, conveyors, carts, etc.) is formally modeled by using Activity Cycle Diagrams. The issue of "model structuring" is also addressed. The modeling methodology has been successfully applied in a real simulation study of a mass production system.

• 경영과학
• /
• 제29권1호
• /
• pp.153-168
• /
• 2012

Order allocation is one of the most important decision-making problems of firms having significant influences on performances of themselves and the whole supply chain. Existing researches about order allocation have mainly focused on evaluating capabilities of directly connected suppliers so that it is hard to consider effects and interactions from undirected connections over multiple lower-layers. To alleviate the limitation, this paper proposed a novel approach to order allocation using structural hole. By applying the concept of structural hole to the supply network, we could evaluate the structural supplying powers of firms with respect to both of direct and indirect connections. In the proposed approach, we derived a methodology to measure the potential supplying power of each firm by modifying the effective size as one of the measurements of structural hole and then, proposed its application, the structural hole based order allocation strategy. Furthermore, we conducted the agent based modeling of supply chain to perform the decision-making process of order allocation and simulated the proposed strategy. As a results, by coping with the variance of demand more stably, it could improve the performance of supply chain from the aspects of fill rate, inventory level and demand-supply balance.

• 한국도서관정보학회지
• /
• 제36권3호
• /
• pp.275-289
• /
• 2005

본 연구에서는 데이터의 포괄성과 상세성이 있는 MARC를 기반으로 서지정보 개념 모델을 구축하였다. MARC21, MARCXML, MODS를 분석하여 MARC의 개념 모델링에 고려하여야 할 요구 사항을 도출하였으며, 이를 충족할 수 있도록 구축한 개념모델은 MARC 기반에 XML의 태그를 사용할 수 있고 관계형 데이터베이스 구축에 활용할 수 있는 집합관계의 모델이다. 집합체 구조는 다양한 배열의 형태로 구현할 수 있기 때문에 서지정보 시스템 개발에 유용하게 사용할 수 있을 것이다. MARC가 서지 정보 레코드 구조만을 정의하고 있기 때문에 풍부한 의미의 표현에는 한계가 있으므로 더블린 코어 등 MARC 수준의 서지 정보 요소를 확장한 메타데이터 시스템을 도입할 필요가 있다.