• Earthquakes and Structures
• /
• 제6권3호
• /
• pp.267-280
• /
• 2014

Shape Memory Alloy (SMA) braces can be used to reduce seismic residual deformations observed in steel braced Reinforced Concrete (RC) frames. To further enhance the seismic performance of these frames, the use of SMA bars to reinforce their beams is investigated in this paper. Three-story and nine-story SMA-braced RC frames are designed utilizing regular steel reinforcing bars. Their seismic performance is examined using twenty seismic ground motions. The frames are then re-designed using SMA reinforcing bars. Different design alternatives representing different locations for the SMA reinforcing bars are considered. The optimum locations for the SMA bars are identified after analysing the design alternatives. The seismic performance of these frames has indicated better deformability when SMA bars are used in the beams.

• 전자공학회논문지A
• /
• 제29A권11호
• /
• pp.25-39
• /
• 1992

Due to the data processing development by the computer, the early warning system recently has made a remarkable evolution in its functions and performance as a component of the communication and control system which is also supported by the computer communication and intelligence system. In this paper it is presented that a integrated data processing system is designed to integrate the information sent from the various radar systems which constitute an early warning system. The suggested system model of this paper is devided into two types of structures, the centralized model and the distributed model, according to the data processing algorithm. We apply the queueing theory to analyse the performance of the designed models and the OPNET system kernel to make the analysing program with C language. From the analysis of the queueing components by applying the analysis programs to the designed systems, we got the tendancies and characteristics of both models, that is, a fast data processing performance of the distributed model and a stable data processing capability of the centralized model.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2012년도 추계 학술논문 발표대회
• /
• pp.195-196
• /
• 2012

Because of the high level of the safety and durability, a lot of reinforcing bars is placed in the concrete structure of the Nuclear Power Plant. But the overcrowding re-bars cause some problems during the construction as the diseconomy, construction delay, quality deterioration, and so on. These problems can be solved by applying the high-strength reinforcing bars to NPP structure. To achieve this, after analysing the structural target performance like the control of cracks, adherence, shear, torsion, development of reinforcement and earthquake-resistance, the results of the analysis will be reflected in the structural performance evaluation test.

• 디자인융복합연구
• /
• 제14권1호
• /
• pp.83-98
• /
• 2015

본 논문은 좋은 원작의 만화나 웹툰이 흥행에 그다지 성공을 거두지 못하고 있는 상황에서 웹툰의 영화화 중 최고의 흥행 스코어를 기록한 <은밀하게 위대하게>가 어떤 시각적 구성요소를 통해 영화관객을 매료시켰는지, 즉 웹툰과 영화에서 표현되는 시각적 텍스트 분석을 통해 이미지의 유사성을 검토하고자 한다. 이러한 논의는 우선적으로 웹툰과 영화의 싱크로율, 즉 이미지의 유사성에서 기인한 흥행성과의 의미를 도출하고자 한다. 또한 오늘날 웹툰의 영화화가 활성화되고 있는 시점에 그간 흥행의 부침을 겪은 웹툰의 영화화가 일시적인 유행이 아니라 지속가능한지에 대한 물음에 답을 구하고자 한다. 이를 위해 본 연구는 원작 웹툰과 영화화된 <은밀하게 위대하게>의 시각적 구성요소를 비교 분석하여 매체변형에 대한 의미와 가치 그리고 중요성을 제시하고자 한다. 주로 웹툰의 시각적 구성요소와 영화적 요소의 표현형식이 일치하고 있는 장면연출과 칸과 칸의 전환, 그리고 색채와 톤을 위주로 하여 분석할 것이다. 구체적인 구성요소는 화면의 크기, 움직임, 색상과 톤, 배경과 상황, 공간구도와 심도, 콘트라스트, 표현방식과 배열방식으로 텍스트를 나누어 웹툰과 영화의 시각적 표현 방식을 상호 비교한다.

• 한국시뮬레이션학회논문지
• /
• 제30권1호
• /
• pp.21-29
• /
• 2021

본 연구에서는 하드-킬 방식 어뢰 방어체계의 운동 및 센서 분야 주요 파라미터가 방어 성능에 미치는 영향을 분석하기 위한 실험 설계 및 구성요소 모델에 대해서 소개하였다. 시뮬레이션은 적-아 플랫폼이 상호작용하는 교전수준에서 구현되었으며, 방어체계의 핵심 성능을 측정할 수 있는 종말 단계로 범위를 한정하였다. 한편 공학수준 시뮬레이션의 주요 관심사항인 기동(Kinematics), 센서 성능, 음향탐지 이론에 대해 세부적으로 모사하여 현실 충실도를 높였다. 본 연구는 새로운 운용 개념을 가진 무기체계 개발 시 선행되어야 하는 성능 영향 요인 분석을 위한 방법론을 제시하고 있으며 실험을 통하여 주요 파라미터 변화에 따른 방어 성능 변화를 확인 할 수 있었다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
• /
• pp.1241-1245
• /
• 2011

High RAM performance and efficient operation plan and maintenance equipment and policies are needed for improving the system availability performance such as punctuality and schedule adherence while reducing life cycle cost. Because railway systems are repairable, complex and have multi-echelon maintenance support structure, it is much complicated to set RAM performance targets and operation and maintenance plan. It is not easy to solve these problem by mathematical method and simulation can be consider for them. This article suggests the conceptual simulation model for analysing availability of railway system which has complex system structure and operation/maintenance environment.

• Structural Engineering and Mechanics
• /
• 제75권4호
• /
• pp.455-464
• /
• 2020

Reinforcement corrosion is one of the major problems in the durability of reinforced concrete structures exposed to aggressive environments. Deterioration caused by reinforcement corrosion reduces the durability and the safety margin of concrete structures, causing excessive costs in managing these structures safely. This paper aims to investigate the effects of reinforcement corrosion on the load bearing capacity deterioration of the corroded reinforced concrete structures. A new analytical method is proposed to predict the crack growth of cover concrete and evaluate the residual strength of concrete structures with corroded reinforcement failing in bond. The structural performance indicators, such as concrete crack growth and flexural strength deterioration rate, are assumed to be a stochastic process for lifetime distribution modelling of structural performance deterioration over time during the life cycle. The Weibull life evolution model is employed for analysing lifetime reliability and estimating remaining useful life of the corroded concrete structures. The results for the worked example show that the proposed approach can provide a reliable method for lifetime performance assessment of the corroded reinforced concrete structures.

• 대한전기학회논문지:전력기술부문A
• /
• 제48권9호
• /
• pp.1064-1072
• /
• 1999

The basic concepts, which are related to the PSS tuning conditions and performance conditions for the safe of determination of PSS gain and compensation of phasor lagging, are thoroughly investigated in this first part. The performance conditions, where the power system has the lowest inherent damping torque and PSS should provide maximum damping torque, are examined by analysing synchronizing torque and damping torque supplied by the voltage control loop at the oscillation frequency. PSS tuning conditions are also investigated by observing the phasor lagging and the gain, resulted from power system-generator-excitation system depending on operating conditions, such as generator active power, reactive power, transmission impedance and AVR gain. The basic concepts developed in this PartImake it possible to lay foundation for the discussion of PSS tuning in Part II.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 춘계학술대회 논문집
• /
• pp.1330-1335
• /
• 2007

The HVAC and the air duct is to make optimal indoor environment. By the HVAC position, method and the air duct construction, the important elements can affect on cooling performance, passengers' convenience, and energy efficiency. According to this, there are features, such as the indoor temperature distribution, cooling performance, velocity distribution from diffuser, tend to be come out variously. Also, comparing and analysing temperature distribution, cooling performance, air velocity, noise based on the real practical vehicle tests, it shows features in detail. Besides, it can lead to make design the system of HVAC & air duct effectively.

• 농촌계획
• /
• 제19권4호
• /
• pp.105-113
• /
• 2013

This study aimed to provide basic data for the national park management by analysing visitors' behavior and satisfaction determinants by importance-performance analysis and estimated regression analysis through post-occupancy evaluation questionnaire method to the Gyeongju National Park visitors. It was found that facilities and use management according to place and use group, the diversity of visit program, high quality of guidance and hospitality of staffs and conservation of historic and landscape resources for Gyeongju National Park were necessary as the results of behavior analysis, importance-performance analysis. The historic landscape resources, hospitality of staffs, visit road and safety facilities, commercial facilities were important determinants of users' satisfaction as the results of regression analysis. It suggested the characteristics of Gyeongju National Park and these factors were the most important factors for the improved management.