• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1089-1104
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• 2017

We have developed an information management tool for the EDISON (EDucation-research Integration through Simulation On the Net) open platform. EDISON is, at present, a web-based simulation service for education and research in five computational areas, namely, nanophysics, fluid dynamics, chemistry, structural dynamics, and computer aided optimal design. The EDISON open platform consists of three tiers: EDISON application framework, EDISON middleware, and EDISON infra-resources. The platform provides web portals for education and research in areas such as computational fluid dynamics, computational chemistry, computational nanophysics, computational structural dynamics, and computer aided optimal design along with user service. The main purpose of this research is to test the behavior of the release version of the EDISON Open-Platform under normal operating conditions. This management tool has been implemented using the RESTful API designed in EDISON middleware. The intention is to check co-operation between the middleware and the infrastructure. Suggested tools include User management, Simulation and Job management, and Simulation software (i.e., solver) testing. Finally, it is considered meaningful to develop a management tool that is not supported in other web-based online simulation services.

• Composites Research
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• 제37권2호
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• pp.59-67
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• 2024

내열성 및 내충격성, 진동 감쇠 성능이 필수인 엔진마운트 브라켓(engine mount braket)에 적용하기 위한 PA소재 기반 복합재료 제조 방법에 대한 연구를 실시하였다. 복합재료의 기지재로 PA66 수지를 활용하였고, 강화재로 유리섬유를 활용하였다. 복합재료는 injection molding 방법으로 제조하였으며, 보강재인 유리섬유 함량에 따라 열적 특성과 기계적 특성, 형태학적 특성 분석을 진행하였다. 이때, 복합재료의 특성 평가 데이터베이스를 in-put 데이터로 활용하여 3D 모델을 생성하였다. 생성된 3D모델의 진동 감쇠 성능(vibration damping)을 out-put 데이터로 추출하였다. PA기반 복합재료의 특성평가 및 엔진브라켓 형태 3D모델의 진동 감쇠 성능에 대한 시뮬레이션을 진행하는 이유는 실제 자동차 부품을 제조하여 진동 감쇠 성능 시험을 진행하지 않아도 제품의 성능을 예측할 수 있기 때문에, 우수한 제품을 개발하기 위한 개발 비용이 감소할 수 있다. 실제로 시험을 진행하지 않고도 제품 성능을 예측할 수 있기 때문에, 제품 개발에 필요한 시간도 절감할 수 있을 것이라 예상된다. 진동 감쇠 성능 시뮬레이션 결과, 강화재의 질량분율이 높아질수록 진동감쇠 성능이 비례하여 증가하는 경향을 나타내지만, 어느 수준 이상에서는 더 이상 증가하지않고, 소폭 감소하는 결과를 나타내었다. 실제 실험값과 시뮬레이션 값과의 비교 결과, ±5% 이내의 근사치를 나타내었으며, 강화재의 질량분율이 60 wt.%일 때 결과값의 차이가 가장 크게 발생하였다.

• 한국의상디자인학회지
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• 제9권2호
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• pp.49-57
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• 2007

The purpose of this study was to research the efficient tool of the exclusive fabric simulation in Jacquard Textile CAD system. For performing this design study, it designed the surface design of the abstract images of flowers through EAT Designscope CAD system and simulated the interior fabric. To merchandise the fashion items and see the visual image, these fabric simulations was effected by two or three-dimension modeling through EAT designscope, YongWoo CNI, Alias and so on. The result of this study can be summarized as follows. Before the step of weaving the samples from the surface design works, jacquard fabric design can be done very efficiently to apply the design step of the fabric simulation in CAD(Computer Aided Design). As the usage of the simulation tool in CAD system, jacquard design can be easily feed-back to modify for the right fabrics and produced the various designs in the short running time very efficiently. Therefore, this jacquard design system ultimately can be saved cost and developed the higher value-added goods in more response to consumer demands.

• Journal of International Society for Simulation Surgery
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• 제3권2호
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• pp.74-76
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• 2016

Computer-aided navigation system is helpful in maxillofacial surgery with real time instrument positioning and clear anatomic identification. Generally, completely impacted tooth extraction surgery have e high risk by iatrogenic injury such as, adjacent tooth injury, normal anatomical structure injury. This case report describes performing extraction of impacted supernumerary teeth on anterior maxilla by using the navigation system in a 15 years old male patient.

• 한국정밀공학회지
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• 제11권2호
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• pp.104-109
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• 1994

This research describes some developments of computer-aided process planning and die design for hot forging products of H-shaped plane strain produced by the press. The system is composed of three main modules(process planning module, die design module and simulation module) which are used independently or in all. Systm capabilities include as follows: 1. In die design module, using the results of process planning module, the shape and size of bolcker and finish die in each operation are determined and the ouput id generated in graphic form for manufacturing drawing. 3. In simulation module, the flow pattern of workpiece and the load/stroke curve are approximately predicted. Design rules for process planning and die design are extracted from plasticity theories, handbooks, relevant references and empirical know-how of field experts in hot forging companies. The developed system provides poweful capabilities for process planning and die design of hot forging products.

• 한국식품과학회지
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• 제22권4호
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• pp.473-478
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• 1990

컴퓨터를 이용해 건조식품의 수분 증가 및 감소를 여러 유통 환경에서 예측할 수 있는 시뮬레이션이 크라프트지로 포장된 옥수수 전분을 시료로 하여 행해졌다. 즉 기체 및 수증기 부과성이 있는 포장지로 포장된 옥수수전분의 흡습에 의한 수분함량 및 수분활성의 변화를 예측할 수 있는 시뮬레이션 프로그램을 제작하여 적용하여 보았다. 전분의 등온흡습곡선은 수분활성 $0.32{\sim}0.90$ 범위에서 선형 회귀에 의해 직선적으로 나타낼 수 있었고 시뮬레이션에 의해 저장 80일 동안 수분함량, 수분활성 및 중량 변화를 예측하여 본 바 실측치와의 최대 편차 8.94% 이내에서 잘 적용되었다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 추계학술대회 논문집
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• pp.126-129
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• 2008

This paper concerns the progressive die design for an automotive bracket part aided by the computer simulation in order to eliminate the inferiority such as the crack. The computer simulation of the progressive forming process is utilized in order to investigate cause of the cracks. This paper proposes a new guideline for the die design which modifies intermediate shapes and adds intermediate forming stages in progressive forming process. The effectiveness of the proposed design is verified by the computer simulation. The simulation result shows that the modified die design for the progressive forming process can eliminate the crack and improve quality of the automotive bracket part.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.55.6-55
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• 2002

Huafei Liao is a graduate student of the Automation department in Tsinghua University, China. His research involves computer-aided process planning, 3D CAD/CAM, virtual reality, and feature recognition.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제38권
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• pp.4.1-4.6
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• 2016

Background: Most cases of facial asymmetry involve yaw deformity, and determination of the yaw correction level is very difficult. Methods: We use three-dimensional soft tissue simulation to determine the yaw correction level. This three-dimensional simulation is based on the addition of cephalometric prediction to gradual yaw correction. Optimal yaw correction is determined visually, and an intermediate splint is fabricated with computer-aided design and computer-aided manufacturing. Application of positioning devices and the performance of horseshoe osteotomy are advisable. Results: With this procedure, accurate repositioning of jaws was confirmed and patients obtained fairly good facial contour. Conclusions: This procedure is a promising method for a widespread, predictable treatment of facial asymmetry.

• The Journal of Advanced Prosthodontics
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• 제13권3호
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• pp.144-151
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• 2021

PURPOSE. The purpose of this in vitro study was to investigate the wear resistance and surface roughness of three interim resin materials, which were subjected to chewing simulation. MATERIALS AND METHODS. Three interim resin materials were evaluated: (1) three-dimensional (3D) printed (digital light processing type), (2) computer-aided design and computer-aided manufacturing (CAD/CAM) milled, and (3) conventional polymethyl methacrylate interim resin materials. A total of 48 substrate specimens were prepared. The specimens were divided into two subgroups and subjected to 30,000 or 60,000 cycles of chewing simulation (n = 8). The wear volume loss and surface roughness of the materials were compared. Statistical analysis was performed using one-way analysis of variance and Tukey's post-hoc test (α=.05). RESULTS. The mean ± standard deviation values of wear volume loss (in mm³) against the metal abrader after 60,000 cycles were 0.10 ± 0.01 for the 3D printed resin, 0.21 ± 0.02 for the milled resin, and 0.44 ± 0.01 for the conventional resin. Statistically significant differences among volume losses were found in the order of 3D printed, milled, and conventional interim materials (P<.001). After 60,000 cycles of simulated chewing, the mean surface roughness (Ra; ㎛) values for 3D printed, milled, and conventional materials were 0.59 ± 0.06, 1.27 ± 0.49, and 1.64 ± 0.44, respectively. A significant difference was found in the Ra value between 3D printed and conventional materials (P=.01). CONCLUSION. The interim restorative materials for additive and subtractive manufacturing digital technologies exhibited less wear volume loss than the conventional interim resin. The 3D printed interim restorative material showed a smoother surface than the conventional interim material after simulated chewing.