• Journal of Korean Society of Steel Construction
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• v.21 no.2
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• pp.105-113
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• 2009

To improve braced frame performance, the connection strength, stiffness, and ductility must be directly considered in the frame design. The resistance of the connection must be designed to resist seismic loads and to help provide the required system ductility. In addition, the connection stiffness affects the dynamic response and the deformation demands on the structural members and connections. In this paper, current design models for gusset plate connections are reviewed and evaluated usingthe results of past experiments. Current models are still not sufficient to provide adequate connection design guidelines and the actual stress and strain states in the gusset plate are very nonlinear and highly complex. Design engineers want simple models with beam and column elements to make an approximate estimation of system and connection performance. The simplified design models are developed and evaluated to predict connection stiffness and system behavior. These models produce reasonably accurate and reliable estimation of connection stiffness.

• Journal of Dental Rehabilitation and Applied Science
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• v.24 no.3
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• pp.269-281
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• 2008

Fatigue or overload can result in mechanical problems of implant components. The mechanical strength in the implant system is dependent on several factors, such as screw and fixture diameters, material, and design of the fixture-abutment connection and abutment. In these factors, the last rules the strength and stability of the fixture-abutment assembly. There have been some previous reports on the mechanical strength of the fixture-abutment assembly with the compressive bending test or short-term cyclic loading test. However, it is restrictive to predict the long-term stability of the implant system with them. The purpose of this study was to evaluate the influence of the design of the fixture-abutment connection and abutment on the mechanical strength and failure mode by conducting the endurance limit test as well as the compressive bending strength test. Tests were performed according to a specified test(ISO/FDIS 14801) in 4 fixture-abutment assemblies of the Osstem implant system: an external butt joint with Cemented abutment (group BJT), an external butt joint with Safe abutment (group BJS), an internal conical joint with Solid abutment (group CJO), and an internal conical joint with ComOcta abutment (group CJT). The following conclusions were drawn within the limitation of this study. Compressive bending strengths were decreased in order of group BJS(1392.0N), group CJO(1261.8N), group BJT(1153.2N), and group CJT(1110.2N). There were no significant differences in compressive bending strengths between group BJT and group CJT(P>.05). Endurance limits were decreased in order of group CJO(600N), group CJT(453N), group BJS(360N), and group BJT(300N). 3. Compressive bending strengths were influenced by the connection and abutment design of the implant system, however endurance limits were affected more considerably by the connection design.

• Journal of the Earthquake Engineering Society of Korea
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• v.13 no.5
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• pp.73-78
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• 2009

Steel Braced frames are a commonly-used seismic resisting system, and chevron steel braced frames are a frequently used type of steel braced frame. Recent research has indicated that the seismic performance of braced frames can be improved by designing the braced frame gusset plate connections in a manner that direct reflects seismic deformation demands, and by permitting yielding in the gusset plate at select performance levels. A parametric study using Finite Element (FE) models was conducted to examine the influence of the gusset plate and framing elements on the seismic performance of chevron braced frames, and to calibrate and develop improved design models. The impact of the frame details, including frame sizes, clearance requirements, gusset plate thickness and tapered plate, was explored. The results suggested that proper detailing of the connection can result in a significant improvement in the frame performance. The results also show that the gusset plate thickness has a significant impact on frame performance.

• Proceedings of the Korea Multimedia Society Conference
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• 2004.05a
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• pp.405-408
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• 2004

본 논문에서는 FPGA와 마이크로프로세서를 이용하여 One Board화된 무선 콘트롤러 시스템의 기저대역부를 설계 하였다. 송신부에서는 컴퓨터와 연결된 마이크로프로세서부에서 컴퓨터를 통해 입력된 데이터를 병렬로 FPGA부로 전송하여 PN_code를 이용한 대역확산 거쳐 전송하고, 수신부에서는 대역역확산를 사용하여 데이터를 다시 수신측 마이크로프로세서를 통해 확인하였다. FPGA 설계는 Xilinx사의 FPGA 디자인 툴인 Xilinx Foundation3.1을 사용하였으며, FPGA configuration을 위한 타이밍 시뮬레이션을 수행하였고. Xilinx사의 SPARTAN2 2S100PQ208칩에 downloading 한 후 Agilent사의 1681A logic analyzer를 사용하여 설계된 회로의 동작을 확인 하였다. 또한 데이터의 입출력을 CPU부를 통해 컴퓨터에서 모니터링 할 수 있도록 설계하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.635-638
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• 2008

본 연구는 웹이나 정보 검색 환경에서 사용자로부터 입력되는 단순한 키워드 형태의 질의가 아닌 문장형태의 질의에 있어 문장이 내포하는 질의의 의미를 결정하여 더 정확한 검색 결과를 제공하기 위해 온톨로지 내 개념들 간의 속성간 연결을 위해 A-Box 기반의 관계 선언과 새로운 N-ary 개체 관계 방법을 제안한다. 특히 개념 개체들 간의 의미를 더 정확히 결정하기 위해 기존의 N-ary 개체 관계 방법이 갖고 있는 속성에 가중치를 포함하는 것이 아니라 가중치에 관련된 새로운 개체를 생성 패턴을 제시하여 특정 개념에 연관된 개념들의 관련성 결정의 성능을 높이도록 하였다. 본 연구의 실험에 있어 사용자가 입력한 병증의 문장을 결정하기 위해, A-Box 기반의 관계 선언과 N-ary 디자인 패턴에 결합하는 지식 도메인 온톨로지 등을 구축하였으며, 이를 통한 실험 결과 문장의 의미에 따른 더 정확한 결과를 보여주었다.

• Journal of the Korea Fashion and Costume Design Association
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• v.12 no.4
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• pp.137-147
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• 2010

This study set out to make experimental clothes by giving variations to the connecting part of a seamless sweater, propose designs and composition approaches to improve the wearing sensation and satisfaction with appearance through wearing trials, and provide basic data that would be of practical help to follow-up study on seamless knit and the growth of seamless knit in the Korean knit industry. The connecting part is the biggest characteristic and the most important part in seamless knitwear and affect the functionality and fitness of the clothes and the appearance of the armhole. The investigator thus made five different pieces of experimental clothes according to the composition methods for connecting part and put them to the test by a group of experts for appearance assessment. The assessment results were analyzed through Analysis of variance(ANOVA), and the items with similar results were put to the Duncan test for intergroup comparison. According to the analysis results, experimental clothes C and E received the highest evaluation in almost every assessment item, whereas experimental clothes A did the lowest appearance evaluation.

• The Journal of the Convergence on Culture Technology
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• v.8 no.1
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• pp.537-544
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• 2022

As the penetration of electric vehicles and development of new models, user experience factors are getting more important in designing connectivity systems for car infotainment services. The primary object of this study is to identify commonalities and differences by comparing user experience factors in the Korean and US electric vehicle markets. This study derived connectivity keywords by text mining the vehicle introduction on the market in each country, and performed centrality, cluster analysis and visualization mapping using the semantic network analysis. As a result, the Korean new electric vehicle connectivity service mainly focused on driving functions such as driving, parking assistance, and charging, while US focused on device connection, convenience function control, app use, entertainment viewing. Based on the analysis, this study presented the practical implications in marketing, system design, and HMI design.

• Korean Institute of Interior Design Journal
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• v.15 no.4 s.57
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• pp.29-36
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• 2006

Fashion and interior architecture are two areas of design that may share common issues, trends and philosophies, making fashion design human's second skin and interior architecture the third. The concept of 'skin' has become one of the most interesting phenomena in design during the past decade and not surprisingly similar issues can be seen also in fashion and architectural design. The current trend in fashion design is that the skin (clothing) has become detached from the human body and extended into the environment, resulting fashion as art objects. Skin in architecture and interior design has also become detached from the structure so designers have more freedom to experiment by using advanced technologies. The present study attempts to analyze common features of 'skin phenomenon' in fashion and interior architecture that are; detachment, emphasis on space, extension, territorial blending, and digital applications. The researcher has used constant comparative method to categorize the five features among many examples. The limitation of this study is that it is focused on the formative phenomena of projects excluding the philosophies and personal background of each designer. However, it is hoped that the study may assist designers and other researchers to understand relationships between fashion and interior design, hold broader spectrum in art and design.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.1
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• pp.719-727
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• 2021

In the field of architecture, retractable devices capable of responding flexibly to the environment have been applied widely to large structures. Among these devices, the aesthetically pleasing retractable membrane is lightweight so that the membrane can be opened easily using only a traction device. On the other hand, because the towed membrane moves as it is connected to the main cable by a trolley, the number of trolleys needed increases in proportion to the roof's area. This study proposes an optimal model for an open-type trolley (OTT), which is used widely in these devices, using topology optimization. The analysis used the ANSYS program. A new model was proposed based on the results and reviewed through the feedback. Through this process, it was possible to develop a prototype with increased durability and reduced weight. For OTT, optimization was performed based on static analysis and the boundary conditions, so three prototypes were designed. A comparison of the proposed trolley with the conventional one under the same conditions revealed an up to 71.04% decrease in volume while the yield-strength reached 8.67 to 11.43%. In conclusion, the optimal trolley proposed was found to be reliable in terms of economy and stability.

• Korean Institute of Interior Design Journal
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• v.15 no.4 s.57
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• pp.37-45
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• 2006

The purpose of this study is to stand assembly the meaning and function of entry space with analysing their social and cultural characteristic. The entry space is the linkable place between inner space and out space, and that is the transition place to be experienced two opposing characteristic. Till now the entry space has not taken effect as symbol needed to the resident and observer, and that has been a tendency to shrink as the minimal sign of entrance. So thus, it is in need of studying the entry space's specific and characterizing structurally as expanded function. For the purpose, this study define newly the meaning, function and composition of entry space in an apartment building, and try to find how to reinforce a resident identity. This study propose justification that the entry space isn't boxing space minimally but enforcing symbol presented clearness of composition and vital character.