• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2000년도 봄 학술발표회 논문집
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• pp.485-490
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• 2000

This paper describes the application of discretized continuum-type optimality criteria (DCOC) for minimum-cost design of the reinforced concrete frame structures consisting of beams and columns. The cost of construction as objective function which includes the costs of concrete, reinforced steel and formwork is minimized. The design constraints include limits on the maximum deflection at a prescribed node, bending and shear strengths in beams, uniaxial bending strength of columns according to design codes(CEB/FIP, 1990). In the first stage, only beams with uniform cross-sectional parameters per span are considered. But the steel ratio is allowed to vary freely. The cross-sectional parameters and steel ratio in each column are assumed to be uniform for practical reasons. Optimality criteria is given based on the well known Kuhn-Tucker necessary conditions, followed by an iterative procedure for designs when the design variables are the depth and the steel ratio. The versatility of the DCOC technique has been demonstrated by considering numerical examples which have one-bay four-storey frame.

• 패션비즈니스
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• 제19권4호
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• pp.75-91
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• 2015

There is an increased interest in having beauty regardless of ages and sex with improvement of the national income level and increase in social activities. Competition within the beauty service industry is increasing rapidly because of global impact within Korea wave. Thus, active public relations and offering distinguished service in the beauty service industry are important. Also, uniforms play an important role in providing an image differentiated from other brands and presents professionalism to the customer. Therefore, we determined function and design of uniforms required in beauty service industry by researching wearing realities, satisfaction, preferred designs and functions of uniforms from hair shop staff. Functional and aesthetic uniforms play an important role to enhance the staffs' sense of belonging. In addition, it is good for the image of hair shop. Special design mirroring job characteristics with expression of differentiated personalities is needed. However, the research was conducted only in the hair shop in Seoul, Daejeon, and Gyeonggi-do. Further studies on much wider areas will be needed.

• 한국결정성장학회지
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• 제15권4호
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• pp.135-140
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• 2005

Thermal-fluid analysis was performed to understand the thermal behavior in the horizontal CVD reactor thereby to design a susceptor which has a uniform deposition rate during silicon EPI growing. Four different types of susceptor designs, standard (no hole susceptor), hole $\sharp$1 (240 mm), hole $\sharp$2 (150 mm) and hole $\sharp$3 (60 mm), were simulated by CFD (Computational Fluid Dynamics) tool. Temperature, gas flow, deposition rate and growth rate were calculated and analyzed. The degree of flatness of EPI wafer loaded on the susceptor was computed in terms of silicon growth rate. The simulation results show that the temperature and thermal distribution in the wafer are greatly dependent on inner diameter of hole susceptor and demonstrate that the introduction of hole in the susceptor can degrade wafer flatness. Maximum temperature difference appeared around holes. As the diameter of the hole decreases, flatness of the wafer becomes poor. Among the threes types of susceptors with the hole, optimal design which resulted a good uniform flatness ($5\%$) was obtained when using hole $\sharp$1.

• 한국전산유체공학회지
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• 제17권3호
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• pp.93-98
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• 2012

The injection molding process is suitable for manufacturing complicated plastic products. As the customer request higher quality products increase, realization of the precise dimensional and shape controls is getting more important. For this purpose it is important to obtain uniform cooling procedure over the whole surface of the high temperature molded plastic. Failure to this may lead to different shrinkage speed, internal stresses and unwanted shape deformations. It is necessary to distribute coolant flow rates to the main channel and to the sub-channels properly to insure uniform cooling process when there are parallel cooling channels. In this study, three-dimensional turbulent flow simulations for representative parallel cooling channels were performed. To insure the intended flow rate to each sub-channels, various shape designs for the channel system were investigated. The results show that as the Reynolds number increases the effect of shape design is more profound. Through the proper flow distribution, uniform cooling effects would be expected.

• 한국의류산업학회지
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• 제21권2호
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• pp.209-219
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• 2019

This study analyzed and compared wearer mobility for different types of clothing that also included the potential to develop firefighter station uniforms using range of motion (ROM) and electromyography (EMG). This study focused on a comparison of wearer mobility affected by different materials and shapes of the station uniforms worn under firefighter turnout gear. Japanese standard uniform (UNI), stretch-wear (ST), and compression-wear (CP) were used as station uniforms for the experiment. This study analyzed wearer movements and quantified ROM and EMG. In addition, the subjective evaluation of wearer mobility and comfort were assessed for comparisons. Nine healthy male students participated in the experiment. Wearer mobility was analyzed using ROM and EMG data obtained by measuring five motions; in addition, subjective evaluations were also obtained. As compared with the standard station uniform, ROM increased 6.8 % and 7.2 % due to stretch-wear and compression-wear. The benefits of wearing stretch material or compression material to improve muscle performance (such as reduced percent of maximum voluntary contraction) were not proven. Differences between materials and designs influenced subjective wearer comfort. In particular, the wearing of compression materials was shown best in terms of wearer comfort that may also allow greater wearer mobility.

• 한국복식학회:학술대회논문집
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• 한국복식학회 2003년도 International Costume Conference
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• pp.79-79
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• 2003

The culture of 21c, that is, a century of globalization, will be more mutifarious, and, in the spur of the society based on knowledge, the world will be a simultaneous community. Therefore, in parallel with the globalizational tendencies, each country must develop its own images and designs for their cultural identities. This means a need for those images that gives life to a traditionality of the korea in the diverseness of the culture in the world. Studies and efforts for producing extra values are needed in a view-point of a development of the cloth-design.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(2)
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• pp.329-332
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• 2001

This paper proposes a capacitance extraction algorithm based on boundary element method and describes the implemented 2-dimension extractor based on the proposed algorithm. The proposed algorithm uses a generalized conjugate residual iterative algorithm with a hierarchical subdivision. The implemented 2-D extractor computes the capacitances of complicated 2-D geometry of ideal conductors in uniform dielectric and can be efficiently used in the VLSI layout designs due to its user-friendly GUI.

• 한국가시화정보학회지
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• 제19권2호
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• pp.56-62
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• 2021

Solid oxide fuel cells (SOFCs) is the high efficiency fuel cell operating at high temperatures ranging from 700-1000℃. Design of the flow paths of the fuel and air in SOFCs is important to improve cell performance and prevent cell degradation. However, the uneven distribution of current density in the traditional type having one inlet and outlet causes cell degradation. In this regard, the parallel flow path with two inlet and outlets was designed and compared to the traditional type based on computational fluid dynamics (CFD) simulation. To check the cell performance, hydrogen distribution, velocity distribution and current density distribution were monitored. The results validated that the parallel designs with two inlets and outlets have a higher cell performance compared to the traditional design with one inlet and outlet due to a larger reaction area. In case of uniform-type paths, more uniform current density distribution was observed with less cross-sectional variation in flow paths. In case of contracted and expanded inflow paths, significant improvement of performance and uniform current density was not observed compared to uniform parallel path. Considering SOFC cell with uniform current density can prevent cell degradation, more suitable design of SOFC cell with less cross-sectional variation in the flow path should be developed. This work can be helpful to understand the role of flow distribution in the SOFC performance.

• 대한지역사회영양학회지
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• 제15권2호
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• pp.253-265
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• 2010

The purpose of this study was to examine the designs of the menu books as an important tool of marketing and then present its improvement strategies. For this, the investigator comparatively examined the current status of menu book designs of the restaurants in Incheon area with 295 managers and then analyzed menu book designs by its designers. Menu book designers were printing houses (42.0%), specialized business (31.9%) and managers/employees (26.1%). 51.5% of menu books were impossible to substitute partially. Even there were seasonal menus or event menus, 27.5% of them were impossible to replace menu books partially; therefore, it was impossible to take a prompt action for seasonal or event menus. The easiness of understanding the terminology in menu books was average $2.74{\pm}0.45$(3-point scale). The harmony of menu book design with restaurants was average $2.46{\pm}0.51$ (3-point scale). Comparing to the menu books designed in specialized business, the menu books designed in printing houses or by managers/employees were uniform in type sizes (p < 0.001), had no menu photos (p < 0.001) and explanations (p < 0.001), and did not classify menus by groups (p < 0.001) in general. In addition, profit-making menus were not properly emphasized (p < 0.001), thus making the design of menu books a little improper. Therefore, it is necessary to educate managers in the restaurants to understand the importance of menu books and thus improve it. In addition, by maintaining close communication with designers of menu books, managers in the restaurants must ensure for their menu books to be designed appropriately, thus making their menu books play the role of an important marketing tool.

• 디지털융복합연구
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• 제19권3호
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• pp.331-344
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• 2021

본 연구의 목적은 우리가 일상에서 사용하고 있는 식생활 도구인 젓가락의 디자인에 대해 살펴보고, 획일화되고 한정된 우리의 금속젓가락 디자인을 지양하여 식탁의 미학을 더할 디자인으로의 향상을 꾀하고자 3D 모델링 시스템의 활용 가능성을 모색하는 데 있다. 이를 위해, 연구자는 한국의 문화요소를 디자인의 조형요소로 활용하는 가운데 3D 모델링을 이용한 섬세한 표현을 통해 독창적인 문화콘텐츠가 될 수 있도록 시제품을 제작하였다. 제작 결과, 한국의 특성을 지닌 개성 있는 젓가락 디자인을 도출할 수 있었다. 이러한 시제품의 사례와 같이 3D 모델링과 3D 프린팅은 젓가락 디자인의 새로운 탐색에 도움을 줄 수 있을 것이며, 다양한 시뮬레이션을 통해 디자인의 향상과 품질을 개선시킬 수 있을 것이다. 또한 한국의 문화상품으로서의 역할을 할 수 있는 문화콘텐츠 개발에 도움이 될 것이다.