• Design & Manufacturing
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• 제12권3호
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• pp.55-59
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• 2018

In a multi-cavity mold having a runner layout of a fish bone structure, problems of unbalanced filling between cavities occur constantly. Unbalanced charging lowers the dimensional accuracy of a molded article and causes deformation after molding. To solve this problem, the gate size connected to each cavity is adjusted using the BGV (Balanced Gate Value) equation. In this paper, in order to solve the filling imbalance problem of the runner layout mold of fish bone structure through injection molding analysis study, we compared the charging imbalance phenomenon before and after improvement after adjusting the gate size by applying BGV equation. From the results of the molding analysis, the shrinkage ratio before and after the improvement of the molded article was improved by only about 0.08%. Based on these results, it was confirmed that the charging imbalance problem was not significantly improved even when the BGV equation was applied.

• 대한건축학회논문집:구조계
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• 제35권5호
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• pp.169-179
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• 2019

During the initial design stage of apartment complex, the photovoltaic(PV) system has been considered as an alternative of renewable energy system and planned to install at the rooftop floor level in general. The electric power generation characteristics can be influenced by the block layout, building orientation and roof top structure because of azimuth angle, tilt angle, and partial shading. This study aims to investigate power generation characteristics of photovoltaic system in apartment buildings by considering the partial shading conditions due to the block layout, building orientation and roof-top structures. For the photovoltaic module arrangement planning in rooftop floor level, shading areas were firstly analyzed due to the adjacent building structure. And the annual and seasonal power generation of PV system were analyzed through the PVsyst simulation results. The results show that shading period at the roof top surface can be increased due to the parapet and water tank. Initial design power capacity can be decreased by considering the daily insolation period and distance between PV modules through the shading simulation. As the number of PV modules decreases, the annual power generation can be decreased. However annual power generation per unit area of PV modules can be increased and performance ratio can be increased above 80%. Also the power generation of PV system can be critically affected by building orientation and the performance ratio can be drastically decreased in east-oriented buildings due to the shading problems caused by adjacent structures at roof top level such as parapet and water tank.

• 복식문화연구
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• 제18권2호
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• pp.261-276
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• 2010

The analysis of an art trend in the principle dimension starts by observing the object of work in the perspective of formative composition and recognizing it as a universal system. It can be said that it is consistent with an interpretation method for a form theory of formal history by Heinrich W$\ddot{o}$lfflin, a leading form critic in art criticism. Hence, the purpose of this study was to find out what are the formative principles in Renaissance Classicism as a design principle to be applicable to modern fashion by reviewing the formative characteristics of Renaissance Classicism Architecture with which W$\ddot{o}$lfflin directly dealt. As for the theoretical literature review, I used W$\ddot{o}$lfflin's theoretical framework and looked at the Renaissance Classicism Architecture that he studied and examined the possibility of utilizing his theory as a layout principle and the characteristics. As for analysis of design cases, I applied the aforementioned architecture layout principle to modern fashion and conducted case study analysis to delve into distinctive layout principles found in fashion. The study showed that the Renaissance Classicism Architectural Style is marked by linearity, planarity, closing and multiple unity: linearity was expressed in the observation form in fixed frontal view and an emphasis on a tangible silhouette homeogenous and definite line structures; planarity was achieved in the form of paralleled layers of frontal view element, planarity style, and identical and proportional repetition of various sizes.; closing signified the pursuit of complete and clear regularity, and architecture developed in a constructive phase through organizational inevitability and absolute invariability.; multiple unity was expressed in self-completedness and independent parallel of discrete forms and harmony of emphasized individual elements in a totality. Applying these layout characteristics of the Renaissance Classicism Architectural style and to see their individual expressive features, I found out that in adopting layout principles of the Renaissance Classicism Architecture to modern fashion, it turned out to be an emphasis of individual silhouettes, a flattened space, completed objects, organic harmony among independent parts: the emphasis of individual silhouettes was expressed in individual definitiveness of formative lines of clothes in accordance with body joints and an emphasis on formative lines of clothes; the flattened space was marked by single layer structure, planarity of elements of clothes, and listing arrangement by appropriate proportion.; the completedness of the objects was expressed by the stationary state where overall image is fixed, the construction of homogeneous and complete space, and absolute inevitability of internal layout in proportion; lastly, organic harmony of independent parts was stressed in independent completedness of each detail, and organic harmony of the whole. The expressive features would lead to a unique expression style of linear emphasis, proportion, constructive forms, and two-dimensional arrangement. The meaning of this study is follows: The characteristics of art school of thought are given shape by appling & analysing the architectural layout principles of historical art school of thought to modern fashion in the view point of formal construction dimension. The applied possibility of historical art school of thought as the source of inspiration about the fashion design is extended.

• Journal of Electrical Engineering and Technology
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• 제12권4호
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• pp.1619-1626
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• 2017

Electronic components that are used in high-level radiation environment require a semiconductor device having a radiation-hardened characteristic. In this paper, we proposed a radiation-hardened I-gate n-MOSFET (n-type Metal Oxide Semiconductors Field Effect Transistors) using a layout modification technique only. The proposed I-gate n-MOSFET structure is modified as an I-shaped gate poly in order to mitigate a radiation-induced leakage current in the standard n-MOSFET structure. For verification of its radiation-hardened characteristic, the M&S (Modeling and Simulation) of the 3D (3-Dimension) structure is performed by TCAD (Technology Computer Aided Design) tool. In addition, we carried out an evaluation test using a $Co^{60}$ gamma-ray source of 10kGy(Si)/h. As a result, we have confirmed the radiation-hardened level up to a total ionizing dose of 20kGy(Si).

• Steel and Composite Structures
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• 제26권6호
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• pp.759-769
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• 2018

This paper studies shear and tensile behaviors of headed stud connectors in double skin composite (DSC) structure. Firstly, 11 push-out tests and 11 tensile tests were performed to investigate the ultimate shear and tensile behaviors of headed stud in DSC shear wall, respectively. The main parameters investigated in this test program were height and layout of headed stud connectors. The test results reported the representative failure modes of headed studs in DSC structures subjected to shear and tension. The shear-slip and tension-elongation behaviors of headed studs in DSC structures were also reported. Influences of different parameters on these shear-slip and tension-elongation behaviors of headed studs were discussed and analyzed. Analytical models were also developed to predict the ultimate shear and tensile resistances of headed stud connectors in DSC shear walls. The developed analytical model incorporated the influence of the dense layout of headed studs in DSC shear walls. The validations of analytical predictions against 22 test results confirmed the accuracy of developed analytical models.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1996년도 가을 학술발표회 논문집
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• pp.315-321
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• 1996

The structural topology optimization presented in this paper is based on an evolutionary procedure, developed by Xie and Steven, in which the low stressed material of a structure is removed from the structure step-by-step until an optimal design is obtained. By appling this procedure a layout or topology of a structure can be found from a initial block of material. The purpose of this paper is to implement the evolutionary procedure, introduce some novel features and investigate its feasibility by studying a few examples.

• 소성∙가공
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• 제23권8호
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• pp.501-506
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• 2014

Progressive shearing with blanking dies is commonly employed to produce large quantities of tiny sheet metal electronic parts. Sheet metal pins, which are narrow and long, that are sheared with a progressive die set are often twisted. The twist in the sheet metal pins, which usually occurs in the final shearing operation, generally decreases with increasing blank holding force. The blank holding forces in all shearing operations are not the same because of different shearing positions and areas. In the current study, the optimal layout of the springs in a progressive die set to minimize the twist of the sheet metal pin is proposed. In order to find the holding force acting on the tiny narrow blanks produced with the proposed springs during the shearing process, the equivalent area method is used in the structural analysis. The shearing of the sheet-metal pin was simulated to compute the twist angle associated with the blank holding force. The constraint condition satisfying the pre-set blank holding force from the previous shearing operations was imposed. A design of experiments (DOE) was numerically implemented by analyzing the progressive die structure and by simulating the shearing process. From the meta-model created from the experimental results and by using a quadratic response surface method (PQRSM), the optimal layout of the springs was determined. The twist of sheet metal pin associated with the optimal layout of the springs found in the current study was compared with that of an existing progressive die to obtain a minimal amount of twist.

• 건축역사연구
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• 제18권5호
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• pp.81-100
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• 2009

The study on Buddhism architecture in early Joseon dynasty was inactive. The period of King Sejo is important for studying the trend of Buddhism architecture in early Joseon, that was transmitted from the end of Goryeo dynasty, but it was difficult to know its exact situation due to lack of related records. The records were all written by Kim Su-ohn, which are Wongaksabi' 'Sangwonsajungchanggi' 'Bongseonsagi 'Geonginsajungchanggi'. The main hall was mainly second floor and there were necessarily annexed buildings at the right and left of the main hall. So the plane figure of $\Box\Box\Box$ was shown. It was a main stream for main hall. This layout may be referred to search for the origin of the layout in courtyard based structure(中庭形) in the late Joseon dynasty. Most of temples had 3 gates. Some part of horizontal corridor was used as 2 gates and the outer gate, far from main hall, was without corridor. The gate leading to front yard of main hall was called front gate, the next middle gate and the outer gate was Oisamun(外沙門) or Samun(沙門). Im most of the temples, people could enter into the front yard through pavilion which had the function of bell tower. The pavilions were located between front gate and first corridor. It is thought that this layout of the place for making bean curd outside the temple area will contribute to different studies on temples making bean cure in the future. The records about temples's foundation studied above are a little different between temples, but have more similarities. There common denominators represent the architecture tendency of Buddhist temples in the related period. It is thought that such a tendency was also shown on architecture of other temples during the reign of King Sejo as well as Buddhist temples.

• 지식경영연구
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• 제23권2호
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• pp.193-210
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• 2022

급속한 모바일 기술의 발전과 네트워크 속도 향상은 다양한 서비스 형태로 생활의 편의를 제공하고 있으며 모바일 쇼핑몰에서도 예외는 아니다. 빅데이터를 활용한 맞춤 추천, AI 기반의 특화된 개인화 서비스 등을 활용하여 기업들은 판매촉진에 큰 노력을 하고 있으나, 대다수의 모바일 쇼핑몰에서는 상품에 대한 정보를 담고 있는 상세페이지의 정보 구성은 동일한 레이아웃 형태로 제공되고 있다. 이러한 맥락에서 본 연구는 모바일 상품 상세페이지의 콘텐츠 배열 및 레이아웃이 소비자 성향에 맞게 제공되어야 한다고 판단하여, Higgins의 조절초점이론(Regulatory Focus Theory)을 바탕으로 소비자의 성향을 분류하여 두 가지 레이아웃 배열의 상품 상세페이지를 구성하여 제시하였다. 콘텐츠 레이아웃 배열이 F-shaped 패턴으로 제시되었을 때 정돈감(Organizedness)으로 정보가 인지되고, Z-shaped 패턴으로 제시되었을 때 생생함(Vividness)으로 정보가 인지되어 소비자의 성향에 따라 제품 태도와 구매 의도에 영향을 받는지에 대하여 알아보고자 하였다. 결과적으로 예방초점 성향의 소비자들은 콘텐츠 레이아웃 구성이 통일감 있고 정돈감(Organizedness) 있는 형태의 레이아웃 배열에서, 향상초점 성향의 소비자들은 생생함(Vividness)이 느껴지는 자유로운 레이아웃 배열로 제시되었을 때 제품 태도 및 구매 의도에 긍정적인 영향을 받는 것을 확인하였다.

• 한국콘텐츠학회논문지
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• 제10권10호
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• pp.111-119
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• 2010

본 연구는 디지털 케이블방송과 IPTV와 같은 디지털 미디어 서비스의 메뉴 구조에 대한 시선추적 연구이다. 최근 디지털 미디어 서비스의 초기 메뉴 구조는 수평 구조 또는 수직 구조로 제공되고 있는데, 디지털 케이블의 사례와 IPTV의 사례를 볼 때 발전과정은 상이하나, 서비스의 구성이 유사하여 메뉴 타이틀 및 방향에 대한 실험을 통해 시사점을 얻을 수 있을 것이라 판단이 된다. 연구자는 연구주제로 사용자가 메뉴를 조작하면서 인지하는 메뉴 타이틀 인지 정도와 메뉴의 제공방향에 대한 시선 도달시간이 상이한지 확인하고, 논의하는 것으로 정하였다. 연구는 Vertical Type과 Horizontal Type으로 구분된 실험을 통해 각 9가지의 결과를 도출하는 것으로 초기 메뉴에서 선순위로 노출되는 실시간 방송의 경우 수직구조의 메뉴에서, 지상파 및 영화VOD와 같은 후순위 메뉴 서비스의 경우는 수평 구조에서 피험자의 시선이 빠르게 이동한 것을 확인하였다. 연구의 결과는 기존 미디어사업자들의 메뉴 구조진화를 간접적으로 설명하는 것으로 향후의 진화 방향을 설정할 때 실무적으로 도움이 되는 유용한 결과이다.