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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Computational Design and Engineering
Journal Basic Information
Journal DOI :
Society of CAD/CAM Engineers
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Volume & Issues
Volume 17, Issue 6 - Dec 2012
Volume 17, Issue 5 - Oct 2012
Volume 17, Issue 4 - Aug 2012
Volume 17, Issue 3 - Jun 2012
Volume 17, Issue 2 - Apr 2012
Volume 17, Issue 1 - Feb 2012
Selecting the target year
Development of Green-BOM to Manage Eco-friendly Information on Products and Manufacturing Processes
Park, Yongju ; Shin, Moonsoo ; Ryu, Kwangyeol ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 387~397
DOI : 10.7315/CADCAM.2012.387
The world has faced with various environmental problems such as climatic change, global pollution, and depletion of natural resources. Conventional economic development continues not only to intensify the magnitude of the problems but also to damage growth potential of future generations. Therefore, recent manufacturers are highly required to accommodate themselves to sustainable development that aims at preventing the loss to the future generations. Moreover, the manufacturers are under heavy pressure from various environmental regulations. This paper proposes green bill of material (Green-BOM) which conforms to the environmental regulations to restructure eco-friendly manufacturing system. Green-BOM is useful for managing green product and process information to satisfy several environmental regulations by recording energy consumption, recycle rate, volatile organic compounds (VOCs), substance information, and so on.
Tolerance Design for Parts of a Sliding-Type Mobile Phone to Improve Variational Quality of Its Side Gap
Lee, Rae Woo ; Chung, Haseung ; Jee, Haeseong ; Yim, Hyunjune ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 398~408
DOI : 10.7315/CADCAM.2012.398
This paper investigates the tolerance stack-up in a commercial sliding-type mobile phone model developed by a Korean electronics company, with focus on the dimensional quality of the gap between the sliding top and the main body. The tolerance analysis in this study is done using a commercial software package, which runs Monte Carlo simulations to produce the statistical distributions of the gap size at desired locations. Such an analysis revealed that the original design did not yield the desired dimensional quality of the gap. Through a series of systematic analyses and syntheses, an improved design is proposed for the nominal dimensions and tolerances of selected features of the parts. The proposed design was validated, through tolerance analysis simulation, to meet the desired requirement of the gap quality.
An Automatic Block Allocation Methodology at Shipbuilding Midterm Scheduling
Hwang, InHyuck ; Nam, SeungHoon ; Shin, JongGye ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 409~416
DOI : 10.7315/CADCAM.2012.409
Most of the shipbuilding scheduling researches so far have been conducted with stress on the dock plan. That is due to the fact that the dock is the least extendable resource in shipyards and its overloading is difficult to resolve. However, once the dock scheduling is completed, it is also important to make a plan that make the best use of the rest of the resources in the shipyard, so that any additional cost is minimized. This study automates block allocation process by analyzing the existing manual process that designates production bays for the blocks during the midterm planning. Also, a planning scenario validation method is suggested, where block allocation scenarios based on diagrams are edited and simulated.
Comparison of User Interaction Alternatives in a Tangible Augmented Reality Environment
Park, Sang-Jin ; Jung, Ho-Kyun ; Park, Hyungjun ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 417~425
DOI : 10.7315/CADCAM.2012.417
In recent years, great attention has been paid to using simple physical objects as tangible objects to improve user interaction in augmented reality (AR) environments. In this paper, we address AR-based user interaction using tangible objects, which has been used as a key component for virtual design evaluation of engineered products including digital handheld products. We herein consider the use of two types (product-type and pointer-type) of tangible objects. The user creates input events by touching specified parts of the product-type object with the pointer-type object, and the virtual product reacts to the events by rendering its visual and auditory contents on the output devices. The product-type object is used to reflect the geometric shape of a product of interest and to determine its position and orientation in the AR environment. The pointer-type object is used to recognize the reference position of the pointer (or finger) in the same environment. The rapid prototype of the product is employed as a good alternative to the product-type object, but various alternatives to the pointer-type object can be considered according to fabrication process and touching mechanism. In this paper, we present four alternatives to the pointer-type object and investigate their strong and weak points by performing experimental comparison of their various aspects including interaction accuracy, task performance, and qualitative user experience.
BIM Based Extension of Curved Member Prototypes in Korean Traditional Buildings
Park, Soo-Hoon ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 426~435
DOI : 10.7315/CADCAM.2012.426
This paper starts with an approach to Korean traditional building design using BIM tool as a design methodology where Korean traditional buildings show some difference rather as weaknesses in handling curves and curved members and the construction. BIM design tools, that are adequate in treating modern architectural design vocabularies, show some disadvantages not having necessary elements and components as building libraries. In this paper we build our own libraries adequate to the proper assembling way of Korean traditional buildings. In contrast to the diverse use of straight building members, Korean traditional buildings show rare use of curves and/or curved members in their assemblage. Moreover, in the case of a circular plan, mostly a circle is interpreted in terms of polygons such as square, hexagon or octagon. In this paper, we examine Gwanram-Jung in Changduk Palace, which is probably the only example in Korea showing a use of curves and/or curved members in assemblage. We try to interpret the case as an incomplete prototype and apply in a modern way to complete a circular plan in terms of circular arcade.
Finite Element Modeling of the Rat Cervical Spine and Adjacent Tissues from MRI Data
Chung, Tae-Eun ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 436~442
DOI : 10.7315/CADCAM.2012.436
Traumatic loading during car accidents or sports activities can lead to cervical spinal cord injury. Experiments in spinal cord injury research are mainly carried out on rabbit or rat. Finite element models that include the rat cervical spinal cord and adjacent soft tissues should be developed for efficient studies of mechanisms of spinal cord injury. Images of a rat were obtained from high resolution MRI scanner. Polygonal surfaces were extracted structure by structure from the MRI data using the ITK-SNAP volume segmentation software. These surfaces were converted to Non-uniform Rational B-spline surfaces by the INUS Rapidform rapid prototyping software. Rapidform was also used to generate a thin shell surface model for the dura mater which sheathes the spinal cord. Altair's Hypermesh pre-processor was used to generate finite element meshes for each structure. These processes in this study can be utilized in modeling of other biomedical tissues and can be one of examples for reverse engineering on biomechanics.
Musculoskeletal Models to Predict Patient-specific Gait Patterns Using Function-based Morphing Technique
Park, Byoung-Keon ; Koo, Bon-Yeol ; Park, Eun-Joo ; Chae, Jae-Wook ; Lee, Soon-Hyuk ; Kim, Jae-Jung ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 443~455
DOI : 10.7315/CADCAM.2012.443
The configuration of a musculoskeletal (MS) system is closely related to the individual motions of the human body. Many researches have been focused on evaluating the associations between the MS configuration and the individual motion using patient-specific MS models, but it still remains a challenging issue to accurately predict the motion by differed configurations of the MS system. The main objective of this paper is to predict the changes of a patient-specific gait by altering the geometric parameters of the hip joint using function-based morphing method (FBM). FBM is suitable for motion analysis since this method provide a robust way to morph a MS model while preserving the biomechanical functions of the bones. Computed-muscle control technique is used to calculate the muscle excitations to reproduce the targeted motion within a digital MS model without the motion-captured data. We applied this approach to a patient who has an abnormal gait pattern. Results showed that the femoral neck length and the angle significantly affect to the motion especially for the hip abduction angle during gait, and that this approach is suitable for gait prediction.
A Study on the Interoperability Improvement of IFC Property Information for Energy Performance Assessment in the Early Design Phase
Kim, Inhan ; Yoo, Hyunjae ; Choi, Jungsik ;
Korean Journal of Computational Design and Engineering, volume 17, issue 6, 2012, Pages 456~465
DOI : 10.7315/CADCAM.2012.456
Nowadays, AEC industry tries to adopt BIM for low-carbon and eco-friendly building development. With increasing environment policies, many of global construction projects require the adoption of BIM for its many advantages. The advantages can be maximized with Open BIM since it can produce optimal results for various purposes of energy performance assessment. However there are some troubles in representation and property information in the process of Open BIM based energy performance assessment. To examine such troubles, this study focuses on differences between IFC of Open BIM and IDF format of Energy Plus known as the most accurate and diverse energy performance assessment. Two issues the study addresses are form representation and property information. The study figures out the different definition of IFC and IDF, and suggests the way of interoperability. The interoperability test of IFC for building energy performance assessment hope to develop of Open BIM based energy assessment.