• Proceedings of the Korea Information Processing Society Conference
• /
• 2024.05a
• /
• pp.133-136
• /
• 2024

전 산업에서 초고속 저지연 데이터 서비스 수요가 증가하면서 저지연 트래픽 (low latency traffic, LLT) 처리 중요성이 커지고 있다. 기존 연구들은 LLT 에 우선순위를 부여하여 먼저 처리하는 프리 엠프션 기법을 제안했으나 제어 오버헤드가 증가하거나 non-LLT 트래픽 성능을 열화하는 문제를 해결할 수 없었다. 본 논문에서는 이러한 문제를 해결하기 위해 종래에 사용하지 않았던 짧은 인터프레임 스페이스 (Short Interframe Space, SIFS)를 LLT 에 활용하는 새로운 전송 기법을 제안한다. 본 논문에서는 수치 분석을 통해 제안하는 인터프레임 스페이스 통신 (Interframe Space Communication, ISC)이 종래의 전송 방법 대비 스루풋을 평균 50% 개선하고 지연도를 98% 개선할 수 있음을 보였다.

• Journal of Korean Association for Spatial Structures
• /
• v.3 no.3 s.9
• /
• pp.29-37
• /
• 2003

• Journal of Korean Association for Spatial Structures
• /
• v.7 no.6
• /
• pp.53-60
• /
• 2007

The hole for the insertion of the pin in the shank is exist at ball joint connection of the space frame. It brings about the brittle fracture caused by stress concentration. Consequently it cannot expect the deformation performance or energy absorption performance from ball joint connection. In this study we developed a new connection details which will increase the plastic deformation performance at ball joint connection and can absorb the error in construction, which expect the plastic deformation performance at the reduced shank without brittle fracture at the screw of bolt and pin. Also it's capacity is verified by the performance in numerical analysis and test. We confirmed bolt's plastic deformantion performance through controled shank and pin's area.

• Aerospace Industry
• /
• v.35
• /
• pp.66-69
• /
• 1996

• Transactions of the Korean Society of Automotive Engineers
• /
• v.16 no.1
• /
• pp.175-180
• /
• 2008

Due to the global environment problems and the consumer's need for higher vehicle performance, it becomes very important for the global car makers to reduce vehicle weight. To reduce vehicle weight, many car makers have tried to use lightweight materials, for example, aluminum, magnesium, and plastics, for the vehicle structures and components. Especially, the ASF(aluminum space frame) is known for the excellent concept of the vehicle to satisfy structural rigidity, safety performance and weight reduction. In this research, the design of experiments and the multi-disciplinary optimization technique were utilized to meet the weight and structural rigidity target of the ASF. For the structural performance of the ASF, the locations and the size of aluminum extruded frames, aluminum cast nodes, and the aluminum sheets were optimized. As a result, the optimization design procedure has been set up to meet both structural and weight target of the ASF, and the assembled ASF showed good structural performance and weight reduction.

• Magazine of the Korea Institute for Structural Maintenance and Inspection
• /
• v.17 no.2
• /
• pp.57-64
• /
• 2013

• Proceeding of KASS Symposium
• /
• 2006.05a
• /
• pp.158-162
• /
• 2006

• Journal of Korean Society of Steel Construction
• /
• v.10 no.3 s.36
• /
• pp.487-495
• /
• 1998

Recently, the space truss has been attracted by many designers because of their ability to support significant loads with a minimum material. And it is relatively flexible to design the configuration of structures. This paper presents a volume optimization for the space truss on the basis of result evaluated from nonlinear analysis. The optimization of the truss is done by nonlinear optimum GINO(General Interactive Nonlinear Optimizer) program. The objective function considered is the volume of the steel bars. The constraints for optimum design are the design limits, such as the axial force strength, maximum slenderness, minimum thickness, allowable deflection and ratio of the external diameter to thickness of the circular tube bars.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.11 no.7
• /
• pp.2341-2348
• /
• 2010

In this paper, strain and stress on space frame are analyzed at racing car under crash loads. As the deformation is reduced to a minimum during crash and the vulnerable parts are grasped, the safety of driver is ensured. The vehicle frame is modelled with truss structure by inputting the material property of carbon steel on finite element analysis. The increase of impulse momentum is due to speed change at frontal collision. This influence effected on vehicle frame is also analyzed by ANSYS program. The deformation of the frame is studied by applying the crash loads at front, side and rear directions. Though the influence on the seat of driver is small at frontal and rear crash, the deformation due to impact is progressed into this seat. The safety of frame is enhanced by making up for these weak deformations and these results of simulation analysis can be applied to the production of the actual vehicle frame.

• Journal of The Korean Association of Information Education
• /
• v.22 no.2
• /
• pp.263-274
• /
• 2018

Maker movement is a part of open source making that originated from DIY culture and means production activity through combination of hardware and software as information and communication technology develops. The purpose of this study is to analyze the status and trends of the making movement in the world and to design a framework for the activation of making education. In this study, we developed the framework to spread the making culture by analyzing the current status and trends of making education, and suggested how to adapt the framework for making eduction in classroom. In addition, we analyzed the cases to suggest how making space should be constructed, and pointed the ideal way out to organize the making space.