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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Computational Design and Engineering
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Journal DOI :
Society of CAD/CAM Engineers
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Volume & Issues
Volume 20, Issue 4 - Dec 2015
Volume 20, Issue 3 - Sep 2015
Volume 20, Issue 2 - Jun 2015
Volume 20, Issue 1 - Mar 2015
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Atom Number and Bounding Sphere Based Search Speedup Technique for Similar Proteins Screening
Lee, Jaeho ; Park, JoonYoung ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 321~327
DOI : 10.7315/CADCAM.2015.321
In the protein database search, 3D structural shape comparison for protein screening plays a important role. Protein databases have big size and have been grown rapidly. Exhaustive search methods cannot provide a satisfactory performance. As protein is composed of a set of spheres, the similarity calculation of two set of spheres is very expensive. Thus, a reasonable filtering method could be an answer for the speedup of protein screening. In this paper, we suggest a speedup method for protein screening with atom number and bounding sphere. We also show some experimental results for the validity of our method.
A Study on the Traceability Analysis between Non-standardized Documents
Kim, EunHee ; An, Kyung Ik ; Song, Duck Yong ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 328~336
DOI : 10.7315/CADCAM.2015.328
We proposed a methodology to automatically extract the requirements from the documents and check the consistency and traceability among them. The documents include not only text but also PDF or image files. We also suggest a method to visualize the result with maps, numbers, and graphs. By comparing the results with those of manual reviews from experts, we show that it is necessary to use knowledge-based method in future instead of the wordbased method for improving the reliability. The results can be applied effectively for already existing documents.
Dynamic Association and Natural Interaction for Multi-Displays Using Smart Devices
Kim, Minseok ; Lee, Jae Yeol ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 337~347
DOI : 10.7315/CADCAM.2015.337
This paper presents a dynamic association and natural interaction method for multi-displays composed of smart devices. Users can intuitively associate relations among smart devices by shake gestures, flexibly modify the layout of the display by tilt gestures, and naturally interact with the multi-display by multi-touch interactions. First of all, users shake their smart devices to create and bind a group for a multi-display with a matrix configuration in an ad-hoc and collaborative situation. After the creation of the group, if needed, their display layout can be flexibly changed by tilt gestures that move the tilted device to the nearest vacant cell in the matrix configuration. During the tilt gestures, the system automatically modifies the relation, view, and configuration of the multi-display. Finally, users can interact with the multi-display through multi-touch interactions just as they interact with a single large display. Furthermore, depending on the context or role, synchronous or asynchronous mode is available to them for providing a split view or another UI. We will show the effectiveness and advantages of the proposed approach by demonstrating implementation results and evaluating the method by the usability study.
Planning of Multiple Tooth Implant Placement Using the Standardized Data in Teeth Size and Position
Park, Hyung-Wook ; Park, Sang-Jin ; Park, Hyungjun ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 348~356
DOI : 10.7315/CADCAM.2015.348
It is important to devise methods for assisting dentists to consistently determine implant positions and directions and to accurately perform drilling tasks during dental implant surgery. In this paper, we propose a novel approach to tooth implant placement planning which deals with the determination of the positions and directions of multiple implant fixtures for a set of missing mandibular teeth and suggests the selection of the sizes and types of the implant fixtures. We combine Korean standard data in the sizes and positions of human teeth with the patient specific 3D models of mandibular jawbones, nerve curves, and neighboring teeth around the missing teeth in order to determine the positions and directions of the implant fixtures for the missing teeth. Using the geometric and spatial information of the jawbones, the teeth and the implant fixtures, we can construct the 3D models of surgical guide stents which are crucial to perform drilling tasks with ease and accuracy. Adopted in 3D simulation of dental implant placement, the approach can provide surgeon students with good educational contents. We also expect that, with further work, the approach can be used as a useful tool to plan for dental implant surgery.
Coupled Line Cameras as a New Geometric Tool for Quadrilateral Reconstruction
Lee, Joo-Haeng ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 357~366
DOI : 10.7315/CADCAM.2015.357
We review recent research results on coupled line cameras (CLC) as a new geometric tool to reconstruct a scene quadrilateral from image quadrilaterals. Coupled line cameras were first developed as a camera calibration tool based on geometric insight on the perspective projection of a scene rectangle to an image plane. Since CLC comprehensively describes the relevant projective structure in a single image with a set of simple algebraic equations, it is also useful as a geometric reconstruction tool, which is an important topic in 3D computer vision. In this paper we first introduce fundamentals of CLC with reals examples. Then, we cover the related works to optimize the initial solution, to extend for the general quadrilaterals, and to apply for cuboidal reconstruction.
Design Optimization of Blast and Ballistic Impact Resistance Sandwich Panels Based on Kriging Approximate Models
Jang, Sungwoo ; Baik, Woon-Kyoung ; Choi, Hae-Jin ; Park, Soon Suk ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 367~374
DOI : 10.7315/CADCAM.2015.367
Sandwich panels consisting of various materials have widely been applied for mitigating dynamic impacts such as ballistic and blast impacts. Especially, the selection of materials for different core set-ups can directly influence its performance. In this study, we design the sandwich panels for alleviating ballistic and blast impacts by controlling the stacking sequence of core materials and their thicknesses. FEM studies are performed to simulate the dynamic behavior of sandwich panels subjected to ballistic and blast impacts. Delamination between the core layers is also considered in the FEM studies for feasible design. Based on the FEM data, kriging models are generated for approximating design space and quickly predicting the FEM outputs. Finally, design optimizations are implemented to find the optimum stacking sequence of core materials and thicknesses with given impact situations.
Development of a Bicycle Fitting System Based on Depth Camera through Body Part Recognition
Jeon, Hyesung ; Lee, Jinwon ; Yang, Jeongsam ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 375~384
DOI : 10.7315/CADCAM.2015.375
Recently, there has been a gradual increase in the number of people who are interested in cycling, leading to an increasing number of cycling equipment consumers. However, many bicyclists get hurt because of their lack of knowledge about the right size of bicycle for their body. Although it is necessary for a rider to fit their bicycle to prevent injury, they reject a fitting service because of the long hours and high cost. In this study, we propose a bicycle fitting system that uses a depth camera to improve the limitations of existing manual fitting systems. With the defined formula, the system calculates the size of the bicycle using body image information extracted by a depth camera and visualizes a customized bicycle for a specific consumer. This system will not only save the customer time and money, but will prevent injury from the use of a bicycle that does not fit.
Development of an ISO 15926-based Integration Platform of 3D Design Data for Process Plants
Kim, Byung Chul ; Park, Sangjin ; Kim, Bong Cheol ; Myung, Sehyun ; Mun, Duhwan ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 385~400
DOI : 10.7315/CADCAM.2015.385
ISO 15926 is an international standard for the integration and sharing of plant lifecycle data. Plant 3D design data typically consist of logical configuration, equipment specifications and ports, and 3D shape data. This paper presents the method for the ISO 15926-based integration of plant 3D design data. For this, reference data (class, attribute, and template) of ISO 15926 were extended to describe plant 3D design data. In addition to the data model extension, a plant design information integration platform which reads plant 3D design data in ISO 15926 and displays 3D design information was developed. Finally, the prototype platform is verified through the experiment of loading and retrieving plant 3D design data in ISO 15926 with the platform.
Requirement Analysis and Conceptual Design for a Cybrid Virtual Plant System
Lee, Jae Hyun ; Suh, Hyo Won ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 401~411
DOI : 10.7315/CADCAM.2015.401
Cybrid virtual plant concept is defined as a cyber plant mimicking a physical plant by using plant engineering data and sensor data coming from sensors attached to facilities of the physical plant. Cybrid virtual plant is a new concept for plant industry so that plant managers and operators' requirements need to be captured for systematic application of the concept to the plant industry. The paper proposed an architecture of the cybrid virtual plant, and provided requirement analysis results for a specific plant company. A database, named smart-cube repository, for the proposed cybrid virtual plant is also proposed and its conceptual data structure is described.
Structural Analysis for Spherical Pressure Hull of Deep Manned Submersible
Lee, Hanmin ; Park, Seong-Whan ; Lee, Jai-Kyung ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 412~419
DOI : 10.7315/CADCAM.2015.412
This paper presents the results of the structural analysis and the optimization of a 6,500 m manned submersible. Nonlinear structural analysis for imperfect spheres with the maximum allowable out-of-roundness(OOR) was performed to calculate the thickness of the pressure hull. Dimensions of viewports were determined according to ASME PVHO standard. The design optimization of the spherical hull with openings was divided into two steps - the optimization of the detailed shape of the viewport reinforcements and the optimization of the viewport location in the spherical pressure hull.
A Study on Plant Training System Platform for the Collaboration Training between Operator and Field Workers
Lee, Gyungchang ; Chung, Kyo-il ; Mun, Duhwan ; Youn, Cheong ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 420~430
DOI : 10.7315/CADCAM.2015.420
Operator Training Simulators (OTSs) provide macroscopic training environment for plant operation. They are equipped with simulation systems for the emulation of remote monitoring and controlling operations. OTSs typically provide 2D block diagram-based graphic user interface (GUI) and connect to process simulation tools. However, process modeling for OTSs is a difficult task. Furthermore, conventional OTSs do not provide real plant field information since they are based on 2D human machine interface (HMI). In order to overcome the limitation of OTSs, we propose a new type of plant training system. This system has the capability required for collaborative training between operators and field workers. In addition, the system provides 3D virtual training environment such that field workers feel like they are in real plant site. For this, we designed system architecture and developed essential functions for the system. For the verification of the proposed system design, we implemented a prototype training system and performed experiments of collaborative training between one operator and two field workers with the prototype system.
An Estimation Model of Historical Cost Using BIM Library for Road Project
Moon, HyounSeok ; Ju, KiBeom ;
Korean Journal of Computational Design and Engineering, volume 20, issue 4, 2015, Pages 431~442
DOI : 10.7315/CADCAM.2015.431
Currently, a BIM-based quantity takeoff (QTO) system is mainly focused on architectural projects. To perform this, diverse quantity takeoff methods such as an object-based automatic quantity takeoff, manual quantity and base functions of calculation have widely been utilizing. However, since BIM library for road projects includes structural elements associated with alignment, it is necessary to establish cost estimation system interlocked with historical cost using 3D library by each unit length. Accordingly, the aim of this study is to develop cost estimation model with using a historical cost approach so that it can be utilized in construction planning based on the BIM library for road projects. For this, based on the BIM library for road, the standardized quantity is estimated, and a process for calculating historical cost and a verification model with a 5D simulation was developed by mapping a WBS code with each BIM library object. This can be applied during the approximate cost estimation process in a project planning and an initial design phase for road projects. Besides, it is expected that these results will be utilized in constructing an optimal historical cost estimation process for project libraries.