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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
Editor in Chief :
Volume & Issues
Volume 16, Issue 6 - Dec 2011
Volume 16, Issue 5 - Oct 2011
Volume 16, Issue 4 - Aug 2011
Volume 16, Issue 3 - Jun 2011
Volume 16, Issue 2 - Apr 2011
Volume 16, Issue 1 - Feb 2011
Selecting the target year
A Kinetic Analysis of the Lower Extremity on the Normal and Abnormal Specificity of Walking on Stair for Twenties
Kim, Young-Ji ; Lee, Young-Shin ; Kim, Chang-Won ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 391~396
Gait is walking attitude and indicating state. The body's gait is a good mix in the center of body mechanics and exercises to wake up gently at the same time switch is a pass which is complicated at legs various joints. The shifting action what swing phase and stance phase rhythmic movement of body. One from piece moves with different dot. Especially plain walking and stair walking as a vehicle has been used frequently. Characteristics of the stair walking while the balanced the horizontal and vertical movement. Stair walking often takes place in everyday. It requires large range more than walking at plain in the moment and joint range of gait motion. And consistently applied to joints and various types of loads at legs joint may involve joint disorders. In this study, spastic cerebral palsy existing artificial limbs for disabled people when developing calibration equinus deformity patients induce muscle pain when walking on stairs independently, to reduce the research. Comparing the characteristics of the walking up the stairs for analysis patellofemoral joint pain as a result it is to provide engineering data.
Tolerance Analysis and Optimization for a Lens System of a Mobile Phone Camera
Jung, Sang-Jin ; Choi, Dong-Hoon ; Choi, Byung-Lyul ; Kim, Ju-Ho ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 397~406
Since tolerance allocation in a mobile phone camera manufacturing process greatly affects production cost and reliability of optical performance, a systematic design methodology for allocating optimal tolerances is required. In this study, we proposed the tolerance optimization procedure for determining tolerances that minimize production cost while satisfying the reliability constraints on important optical performance indices. We employed Latin hypercube sampling for evaluating the reliabilities of optical performance and a function-based sequential approximate optimization technique that can reduce computational burden and well handle numerical noise in the tolerance optimization process. Using the suggested tolerance optimization approach, the optimal production cost was decreased by 30.3 % compared to the initial cost while satisfying the two constraints on the reliabilities of optical performance.
A Study on improved AR-based education system for effective transporter operation
Lee, Jung-Min ; Lee, Kyung-Ho ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 407~413
Augmented reality technology can provide computer-generated information to user effectively, therefore many industries have been trying to adopt AR technology to own domain field. Shipbuilding and offshore industry are also trying to introduce the technology, especially in education field. We have already studied about transporter education system based on augmented reality to help understanding for non-expert engineers. Once our previous study was focused on improving of rendering quality, this paper focuses on effective interaction between engineers and system to more increase educational results.
Design and Construction of Collaboration Hub 2.0 based on BPM
Kim, Bo-Hyun ; Jung, So-Young ; Choi, Hon-Zong ; Lee, Sung-Jin ; Jang, Jin-Young ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 414~423
The collaboration hub has been developed since 2004 as an online collaboration space, which supports the various collaborative works amongst small and medium enterprises using information sharing, collaboration project management, and project history management. Because of the change of manufacturing environment and rapid development of information technologies, it should be evolved from the existing version called Collaboration Hub 1.0. Recently, a lot of manufacturing enterprises know the importance of business process management(BPM) and start to introduce BPM systems. Our research group has developed the new version of Collaboration Hub 1.0 called Collaboration Hub 2.0 which contains the BPM concept, the consistent product data management, and the specialized functions overcoming the various variation of manufacturing. This study scrutinizes the meaning and role of the Collaboration Hub 2.0 and introduces an application study of it to the value chain of automobile module development consisted of a leading company and subcontractors. The case study covers the definition, execution and monitoring of collaboration process, the specialized functions overcoming the manufacturing variation and the key performance index of collaboration business.
Generation of Parametric Human Body Segment Models Using Korean Anthropometric Data
Koo, Bon-Yeol ; Choi, Myeong-Hwan ; Chae, Je-Wook ; Kim, Jay-Jung ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 424~436
In this paper, we propose a methodology of generating a parametric segment model for human body using the Korean anthropometric data. The model is defined as an articulated body model consisted with 19 ellipsoid primitives. The primitives are joined at locations representing the physical joints of human body. A lot of previous researches have suggested methodologies of generating body models using the European or American anthropometric data, so that these models were inappropriate for engineering analyses and simulations in case of the Koreans. We defined a set of 35 body dimensions representing our segment model based on the anthropometric data of Koreans. Also we defined four key parameters of age, height, weight and waist circumference, and then we applied regression equations to associate the parameters to the aforementioned dimensions. As the results, we obtained the parametric human body segment models according to the various body types and the subject-specific models for a specific individual. The models in the various industries can be used as the base models for static and dynamic analysis considering the Koreans.
Issues in Control of a Robotic Spatial Augmented Reality System
Lee, Joo-Haeng ; Kim, Hyun ; Suh, Young-Ho ; Kim, Hyung-Sun ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 437~448
A robotic spatial augmented reality (RSAR) system combines a robotics technology with a spatial augmented reality system (SAR) where cameras are used to recognize real objects and projectors augment information and user interface directly on the surface of the recognized objects, rather than relying on handheld display devices. Moreover, a robotic module is actively used to discover and utilize the context of users and environments. The control of a RSAR system involves several issues from different technical fields such as classical inverse kinematics of motors where projector-camera pairs are mounted, inverse projection problems to find appropriate internal/external parameters of projectors and cameras, and image warping in graphics pipeline to compensate the kinematic constraints. In this paper, we investigate various control issues related to a RSAR system and propose basic approaches to handle them, specially focused on the prototype RSAR system developed in ETRI.
A Study on Analysis Process of Customer Requirements and Functional Requirements for a Ship Production Simulations
Hwang, Ho-Jin ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 449~457
The productivity improvement is indispensible to shipbuilding industry for maintaining the world's No. 1. Simulation based production recently has been an issue as prat of efforts to high efficiency production and Korean shipyards requests simulation system tools specialized in a shipbuilding industry. IT convergence project between conventional shipbuilding industry and IT simulation technology has been carried out and integrated simulation framework was proposed as a way to overcome sporadic developments. The framework would provide reusability of kernels and modules and also ensure for expansibilities to other production simulations. The fact that production simulation system should reflect shipyard requirement would be most important. We suggest an analysis process of customer requirements and functional requirements for production simulations. It is partially based on concepts of software engineering and axiomatic design. The process is applied to a design of configuration for simulation framework.
Parametric morphing of subject-specific NURBS models for Human Proximal Femurs Subject to Femoral Functions
Park, Byoung-Keon ; Wook, Chae-Jae ; Kim, Jay-Jung ;
Korean Journal of Computational Design and Engineering, volume 16, issue 6, 2011, Pages 458~466
The morphology of a bone is closely associated with its biomechanical response. Thus, much research has been focused on analyzing the effects of variation of bone morphology with subject-specific models. Subject-specific models, which are generally achieved from 3D imaging devices like CT and MRI, incorporate more of the detailed information that makes a model unique. Hence, it may predict individual responses more accurately. Despite these powerful characteristics, specific models are not easily parameterized to the extent possible with statistical models because of their morphologic complexities. Thus, it is still proven challenging to analyze morphologic variations of subject-specific models across changes due to aging or disease. The aim of this article is to propose a generic and robust parametric morphing method for a subject-specific bone structure. We demonstrate this by using the proposed method on a model of a human proximal femur. Automatic segmentation algorithms are also presented to parameterize the specific model efficiently. A total of 48 femur models were evaluated for defining morphing vector fields. Also, several anatomical and mechanical functions of femur were considered as morphing constraints, and the NURBS interpolating technique was applied in the method to guarantee the generality of our morphed results.