• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.05a
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• pp.107-108
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• 2006

This paper shows the design optimization of the paper feeding mechanism under dynamic behavior by using commercial codes of RecurDyn/MTT2D and RecurDyn/AutoDesign which are developed by functionBay, Inc. A virtual mockup for dynamics analysis of the paper feeding mechanism is build on RecurDyn/MTT2D and is simulated. Flexible paper is represented as a series of rigid bars connected by revolute joints and rotational spring dampers. Paper is fed by a contact and friction mechanism on rollers or guides. The slip of the paper and nip force of rollers are measured to estimate the system performance. After a simulation, these performances are automatically send to RecurDyn/AutoDesign which is a sequential approximate optimization tool based on the response surface modeling. RecurDyn/AutoDesign makes the approximate objective function and computes the optimized design points of the design variables and gives them to analysis tool. And then the simulation is repeated with the updated design variables. These processes are repeated until finding a tolerable design optimization. In this paper, a paper feeding mechanism is introduced and it is optimized with the proposed algorithms.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.2
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• pp.114-120
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• 1999

The DDAM(Dynamic Design Analysis Method) has been the most popular method for the shock response analysis of naval shipboard equipment. It was common to model the equipment as a simplified mass-spring system with multi degree of freedom in DDAM. Nowadays, however, it is necessary to adopt the finite element method for the shock response analysis due to the complexity of equipment. In this study, the DDAM program is developed to evaluate the performance of shock-resistance of FEM models using MSC/NASTRAN DMAP(Direct Matrix Abstraction Program) which provides the practical tools in interfacing with the externally developed program. Through the numerical test of the structural components and comparison with the results of ANSYS DDAM, it is confirmed that the developed program can be applicable to analyze the shock responses of the shipboard equipments.

• Fashion & Textile Research Journal
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• v.19 no.2
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• pp.134-139
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• 2017

This study proposes 3D printed shoe designs with patterns made by reinterpreting traditional Korean muntin patterns as customized designs that are unique to individual consumers and different from existing products. In the fashion industry, shoes with diverse designs grafted with 3D printing technology have been introduced. Artistic 3D printed shoes showcase the unique designs of designers. Functional and practical 3D printed shoes that can be worn during daily activities and during exercise have been actively developed. Traditional Korean pattern designs are also being recreated into designs reflecting the aesthetic sense of modern times with our own identity. The uniqueness of the traditional muntin patterns in geometric shapes, such as intersections of lines, rectangles, and octagons, are expressed in shoe designs with modern aesthetic senses by utilizing the traditional patterns that conform well to the modern geometric beauty of forms. This study was intended to develop 3D shoe designs that reinterpreted the motif of muntin patterns from among traditional Korean geometric patterns with a modern aesthetic sense. The octagonal patterns that express the scenery of spring can be seen through the muntins in traditional Korean-style houses were designed on the heels of shoes. Utilizing the Rhino CAD program and ProJet 660 Pro 3D printer, shoes were designed and printed. The processes for making shoes using 3D printing technology proposed in this study are significant because they represent the creation of designs in a new area. The results of this study might help in the development of 3D printed fashion products.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2011.04a
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• pp.81-86
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• 2011

In order to establish the effective community village as planned, it is the most important factor in residents' participation at the stage of design process. Especially, community space, which is commonly used by all members, must be designed through consultation process of community members themselves to accommodate the needs of various daily activities. So, in this study, the participation process to design the common community facility is developed and the actual residents' participation workshop was conducted in Baek-Hwa village, which is being built on South Korea. Also, the space of community facilities was designed based on the direct opinions and needs of actual residents obtained by workshop process. The workshop was conducted two times: the first workshop was conducted for the design of common residents' facilities and the second was for trying to utilize the virtual designed space. During the workshop process, it is found that the positive participation of members of village is naturally occurred to design residents' space in the workshop process. As a result, most people want to make the space of gym, library, and dining room in spatial configuration. Among them, the hobby room was highly demanded. There is lots of demand for the joint activities and training program in common activity fields. Also, the prediction of the various occurrence so fun expected situations was requested in the game of creating rules and role-playing. In the conclusion, it was acknowledged the necessity of residents' participation design and the importance of communication between architects and residents for decision-making.

• Fashion & Textile Research Journal
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• v.18 no.5
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• pp.553-563
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• 2016

The purpose of this study was to investigate the perception and preference on textile design specially on bedding products which are widely interested in the life-style market. The study was carried out targeting to 250 women between the ages of 20s and 40s based on the four seasons. The collected data was processed with SPSS 21.0 program using frequency, cross tabulation, and ANOVA analysis. The results were as following. There were slight differences on the results of the study including purchase behavior and preferred bedding textile design: color, color tone, and pattern on the textile design of bedding products according to age and season. Most of age had similar color preference on the bedding products in the season but a slight different between fall and winter. However, as color tone and pattern on the textile design of the bedding products were concerned, there were significant difference between the age depending on the season. There were significant differences of color tones and patterns in fall and winter, but not significant in spring and summer. Therefore, the domestic market of the bedding products needs more various textile design development according to consumers' preference and seasonal trend which should be discriminated in order to increase product competitiveness.

• Fashion & Textile Research Journal
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• v.19 no.6
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• pp.671-680
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• 2017

Contemporary people can form a broad social sympathy on cultural products based on the present Korean image. K-pop is good material to use to share korean culture, and fans who are enthusiastic here are increasingly demanding cultural products. The visual materials of Bangtan Boys are collected from their album covers, and a concept book, and divided into specific and symbolic images. Based on this motif, three specific images: 'bulletproof vest', 'army house + superhero extract image', and 'Wings symbol', six designs were proposed. In addition, six motifs from the music videos for recent popular songs, 'Spring Day', 'Blood, Sweat and Tears' and 'Burning Up' were selected as symbolic images. Each selected image is divided into a normal line and a special line. The former is a relatively small, stable, and popular style, and the latter is a large, original, and bold style. By drawing and transforming extracted images and motifs using Adobe Illustrator CS6 and Adobe Photoshop CS6 program, a full-width umbrella design was developed. The messages that the Bangtan Boys wants to convey through their music are put into cultural products that contemporaries can sympathize with. By developing umbrellas, a variety of items and design goods can become desirable points of consumption as high-value products by domestic and foreign fandom. If designs that incorporate various elements of future K-pop contents as well as other Korean Wave contents are developed, it will be possible to develop original design products that will form global understanding.

• International Journal of Highway Engineering
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• v.5 no.4 s.18
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• pp.1-11
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• 2003

Recently, the new pavement design method considering Korean environment and the specification for improving performance of pavement are being developed in Korea. The Jointed Concrete Pavement Program Applying Load Discretization Algorithm (called HEART-JCP) is one of the results of Korea Pavement Research Project in Korea. HEART-JCP program is developed to analyze various loading condition using the load discretization algorithm without mesh refinement. In addition, it can be modified easily into multi-purpose concrete pavement nidyses program because of the modularized structure characteristic of HEART-JCP. The program consists of basic program part and load discretization part. In basic program part, the displacement and stress are computed in the concrete slab, sub-layer, and dowel bar, which are modeled with plate/shell element, spring element and beam element. In load discretization program part, load discretization algorithm that was used for the continuum solid element is modified to analyze the model with plate and shell element. The program can analyze the distributed load, concentrated load, thermal load and body load using load discretization algorithm. From the result of verification and sensitivity study, it was known that the loading position, the magnitude of load, and the thickness of slab were the major factors of concrete pavement behavior as expected. Since the result of the model developed is similar to the results of Westergaard solution and ILLISLAB, the program can be used to estimate the behavior of jointed concrete pavement reasonably.

• Journal of Korean Tunnelling and Underground Space Association
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• v.16 no.3
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• pp.321-339
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• 2014

This paper concerns the development of a knowledge-based tunnel design system within the framework of artifical neural networks(ANNs). The system is aimed at expediting a routine tunnel design works such as computation of segment lining body forces and stability analysis of selected cross section. A number of sub-modules for computation of segment lining body forces and stability analysis were developed and implemented to the system. It is shown that the ANNs trained with the results of 3D numerical analyses can be generalized with a reasonable accuracy, and that the ANN based tunnel design concept is a robust tool for tunnel design optimization. The details of the system architecture and the ANNs development are discussed in this paper.

• Journal of the Korean Society of Costume
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• v.57 no.5 s.114
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• pp.58-71
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• 2007

This study conducted a survey to find out atopic dermatitis patients' required performance and preference in design factors to develop spring/summer(S/S) knitwears preferred by atopic patients. On the platform of achieved information from statistical analysis, S/S knitwear samples for atopic patients were designed and constructed with cotton/Seacell(R) blended yarn, And subjective wearing sensation were evaluated comparing the samples and the commercial products made with cotton/chitosan blended yarn, trying to help producing more comfortable S/S knitwears for atopic patients. SPSS 12.0 program was used for frequency analysis, Chi-square analysis, ANOVA, and Duncan test. The result was as follows; For comfort of S/S knitwears, atopic patients most considered skin care property. Atopic patients preferred simple and basic knitwear in light color with thin and soft fabric such as plain knit. The preferred style was that 'appropriately fit with suitable ease'. They also preferred 'closed front'; 'boat neckline' and 'V neckline'; 'raglan sleeve' and 'set-in sleeve'. For hem trim, they preferred 'rib' structure. Male preferred simple and plain style with 'round collar' and 'tubular or rib trim", while female preferred sophisticated and characteristic style with 'set-in sleeve' with 'rib trim'. Under the circumstances with insufficient functional knitwears developed, this study tried to develop comfort S/S knitwears for atopic dermatitis patients and the developed knitwears showed as good as or better performance in wearing feeling, fitting, and appearance than the previously developed functional goods.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.25 no.12
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• pp.856-865
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• 2015

In a high-speed press, numerous moving links are interconnected and each link executes a constrained motion at high speed. As a consequence, high-level dynamic unbalance force and unbalance moment are transmitted to the main frame of the press, which results in unwanted vibration and significantly degrades manufacturing accuracy. Dynamic unbalance force and unbalance moment inevitably transmits high-level vibrational force to the foundation on which the press is installed. Minimizing the vibrational force transmitted to the foundation is critical for the protection of both the operators and the surrounding structures. The whole task should be carried out in two steps. The first step is to reduce dynamic unbalance based upon kinematic and dynamic analyses. The second step is to design and build an optimal vibration isolation system minimizing the vibrational force transmitted to the foundation. Firstly, the dynamic design method is presented to reduce dynamic unbalance force and moment. For this a 3D CAD software was utilized and a computer program was written to compute dynamic unbalance force and moment. Secondly, the design method for vibration isolation system is presented. The method for designing coil springs and viscous dampers are explained in detail.