• World Technopolis Review
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• 제4권4호
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• pp.238-246
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• 2015

This paper reviews the 6-Month Challenge Platform Program, a short-term intensive start-up supporting program in Korea, which will be launched late 2015 to promote economic growth by taking new ideas and transforming them into new products and start-ups in connection with the Creative Economy Town and the Creative Economy Innovation Centers under the Creative Economy Policy.

• 콘크리트학회논문집
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• 제16권1호
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• pp.111-124
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• 2004

축방향철근의 연결상세에 따라 7개 그룹 총 21개의 원형나선철근 기둥 시험체를 제작하여 준정적 실험을 수행하였다. 축방향철근 연결상세(단일철근, 겹침이음 및 기계적연결), 심부구속철근비, 축력비 등을 주요 실험변수로 채택하였으며 실험결과 축방향철근 연결상세에 따라 다른 파괴거동을 나타내었고, 내진성능에서도 차이를 나타내었다. 축방향철근이 겹침이음된 시험체의 실험결과, 모든 축방향철근이 겹침이음된 시험체는 내진성능이 상당히 저하되는 것으로 나타났으나, 축방향철근의 $50\%$가 겹침이음된 시험체의 경우 제한적이지만 한정적인 연성능력을 나타내었다. 또한, 축방향철근을 커플러를 사용하여 기계적으로 연결한 시험체는 축방향철근이 단일철근으로 구성된 시험체와 유사한 파괴거동 및 강도저감거동을 나타내었다.

• Structural Engineering and Mechanics
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• 제15권3호
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• pp.269-284
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• 2003

This paper reports a series of component tests on a lightweight floor system and a method to predict the natural frequency of the floor using a frame analysis program. Full-scale floor tests are also briefly described. DuraGal steel Rectangular Hollow Sections (in-line galvanised RHS) are used as joists, bearers and piers in DuraGal lightweight floor systems. A structural grade particleboard is used as decking. Connection stiffness between different components (bearer, joist, pier and floor decking) was determined. A 40% composite action was achieved between the RHS joist and the particleboard. Both 2D and 3D models were developed to study the effect of connection stiffness on predicting the natural frequency of DuraGal lightweight floor systems. It has been found that the degree of shear connection between the bearer and the joist has a significant influence on the floor natural frequency. The predicted natural frequencies are compared with measured values from full scale floor testing.

• 복합신소재구조학회 논문집
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• 제5권1호
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• pp.22-27
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• 2014

The flat plate slab system have many good features, which are design flexibilities, saving of story-height and economy of construction etc. But the study of flat plate slab system for H-steel column have been rare both at home and abroad. Recently high-rise residential and commercial buildings have been constructed in urban areas in Korea. The suggested dowel connection system is more likely to adoptable because it remarkably contribute to save inter story height and also to have many advantages compared with conventional steel works such as H-Steel frame + Deck plate slab system. This study aims at developing design method and program for connection between H-Steel column and flat plate slab system, which contribute to save significantly inter-story height.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2007년도 정기 학술대회 논문집
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• pp.677-682
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• 2007

Nonlinear analysis of mixed structures is carried out by utilizing contact elements of a general finite element analysis computer program(ABAQUS). The present analysis focuses on the enhancing behaviors of mixed structure's connection type. Main 2 issues are related with discontinuity which reduce the stiffness of structure and proposing enhanced connection type. To validate the present study approaching 2 way, analytic one and experimental test.

• East Asian mathematical journal
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• 제37권4호
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• pp.401-426
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• 2021

In order to propose ways to implement mathematical connection between algebra and geometry, this study reinterpreted and visualized the Khayyam's geometric method solving the cubic equations using two conic sections and the Al-Kāshi's method of constructing of angle trisection using a cubic equation. Khayyam's method is an example of a geometric solution to an algebraic problem, while Al-Kāshi's method is an example of an algebraic a solution to a geometric problem. The construction and property of conics were presented deductively by the theorem of "Stoicheia" and the Apollonius' symptoms contained in "Conics". In addition, I consider connections that emerged in the alternating process of algebra and geometry and present meaningful Implications for instruction method on mathematical connection.

• Coupled systems mechanics
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• 제7권5호
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• pp.555-581
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• 2018

The moment-resistant steel frames are frequently used as a load-bearing structure of buildings. Global response of a moment-resistant frame structure strongly depends on connections behavior, which can significantly influence the response and load-bearing capacity of a steel frame structure. The analysis of a steel frame with included joints behavior is the main focus of this work. In particular, we analyze the behavior of two connection types through experimental tests, and we propose numerical beam model capable of representing connection behavior. The six experimental tests, under monotonic and cyclic loading, are performed for two different types of structural connections: end plate connection with an extended plate and end plate connection. The proposed damage-plasticity model of Reissner beam is able to capture both hardening and softening response under monotonic and cyclic loading. This model has 18 constitutive parameters, whose identification requires an elaborate procedure, which we illustrate in this work. We also present appropriate loading program and arrangement of measuring equipment, which is crucial for successful identification of constitutive parameters. Finally, throughout several practical examples, we illustrate that the steel structure connections are very important for correct prediction of the global steel frame structure response.

• 한국공간구조학회논문집
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• 제6권3호
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• pp.123-130
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• 2006

본 연구에서는 기존의 고력볼트의 축부절삭 가공방법을 이용한 신형상 메카니컬패스너를 개발하였다. 개발된 신형상 메카니컬패스너를 엔드플레이트 형식의 보-기둥 접합부에 적용하여 변형능력 및 강도특성에 대한 재하실험 및 유한요소법에 의한 수치해석을 수행하였다.

• 한국콘텐츠학회논문지
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• 제18권4호
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• pp.38-47
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• 2018

새로운 콘텐츠를 기획하는 방법에 대한 논의가 활발해지는 가운데, 여전히 새로운 콘텐츠를 기획하는 구체적인 방법론에 대한 미디어 학계의 논의는 활발하지 않다. 본 연구에서는 새로운 콘텐츠를 기획하는 방법으로서 강제연결법과 의미론의 유용성을 자기문화기술지 방식을 통해 검토하며, 인문학이 콘텐츠 생산 현장과 어떻게 접합되는 지 검토해보았다. 연구자가 2007년 방송사 재직 당시 기획했던 시사 인터뷰 프로그램인 <단박인터뷰> 기획 과정을 자기 문화기술지 방식으로 기술하고, 그 경험을 사회문화적 의미와 연결시키고자 했다. 시사 프로그램 제작 경험이 없었던 연구자는 강제연결법을 사용하여 낯선 단어의 의미를 결합하여 '단박인터뷰'를 기획했고, '곧바로', '지체 없이', '현장에서', '솔직하게'를 뜻하는 '단박'이라는 의미를 충실하게 나열함으로써 제작방식과 출연자를 결정하게 되었다. 연구자의 이와 같은 기획방법은 단어의 의미를 기술한 뒤 의미에 맞게 제작 메커니즘을 모색한, 이른 바 의미론에 의한 콘텐츠 기획방식이라 할 수 있다. 의미론에 의한 기획은 단기간에 적은 인원으로 새로운 프로그램을 기획해야 하는 한계상황이 만들어낸 기획 법으로, 콘텐츠 기획에서 인문학적 접근이 유효하다는 것을 보여주는 증거라 하겠다.

• 대한기계학회논문집
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• 제18권4호
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• pp.805-815
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• 1994

The development of automatic production systems has a trend toward Computer Integrated Manufacturing System(CIMS) in recent years. In hardware configuration, CIMS are composed of intelligent CAD/CAM work stations, multifunction CNC machining centers including material handling systems. The DNC systems present the key element of automation hierarchy in a FMS. A DNC system is one which connects a number of numerically-controlled machines to a common memory in a digital computer for part program storage with provision for on-demand distribution of part program data to machines using communication in hierarchical structure of central computer, control computer and cell controller. This paper describes the development of Behind-the-Tape-Reader(BTR) type DNC system using CYBER 180-830 as a central computer and IBM PC-386 cell control computer and NC lathe with FANUC 5T NC controller. In this system, the connection between central computer and cell control computer is done via RS-232C serial interface board, and the connection between cell control computer and FANUC 5T controller is done via parallel interface board. The software consists of two module, central computer communication module for NC program downloading and status uploading, NC machine running module for NC operating.