• Title/Summary/Keyword: long time behavior

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The Relationship between Time Management Behavior and Life Satisfaction among Students in Non-vocational High Schools, Vocational High Schools and Life-long Education Schools (청소년의 시간관리행동과 생활만족도: 인문계고, 특성화고, 평생교육시설 학생들을 중심으로)

  • Nam, Kyung-Ae;Koh, Sun-Kang
    • Journal of Family Resource Management and Policy Review
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    • v.12 no.3
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    • pp.103-117
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    • 2008
  • This study focuses on time management behavior, which differs in (1) the characteristics of schools and (2) the experience of education about time management. Also, this study examines the effect of time management behavior on life satisfaction of vocational and non-vocational high school students, and also those who attend life-long education schools. The study sample consists of 367 teen-age high school students in Seoul. The result of this study demonstrates that the experience of education about time management has a great effect on time management behavior. Students experiencing education about time management have higher scores in time management behavior than those who lack such experience. It also shows a close relationship between time management behavior and life satisfaction in non-vocational high school students and those attending life-long education schools.

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A Study on the Real Time Monitoring of Long Span Bridge Behavior Using GPS (GPS를 이용한 장대교량 실시간 거동 모니터링에 관한 연구)

  • Choi, Byoung-Gil;Sohn, Duk-Jae;Na, Young-Woo
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.28 no.3
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    • pp.377-383
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    • 2010
  • This study aims to develop the system which is able to monitor long span bridge behavior in real time using GPS. Through measuring displacement of long span bridge by GPS in real time, over all 3D behavior of bridge could be analyzed and managed. Monitoring system of long span bridge which is developed in this study is able to manage in real time the safety of bridge by transmitting horizontal and vertical displacement of bridge, and danger signals to an integrated operations center. Also it is able to monitor the absolute behavior of long span bridge by GPS, and to construct a national bridge safety management networks.

ASYMPTOTIC BEHAVIOR OF STRONG SOLUTIONS TO 2D g-NAVIER-STOKES EQUATIONS

  • Quyet, Dao Trong
    • Communications of the Korean Mathematical Society
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    • v.29 no.4
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    • pp.505-518
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    • 2014
  • Considered here is the first initial boundary value problem for the two-dimensional g-Navier-Stokes equations in bounded domains. We first study the long-time behavior of strong solutions to the problem in term of the existence of a global attractor and global stability of a unique stationary solution. Then we study the long-time finite dimensional approximation of the strong solutions.

Experimental study on long-term behavior of prestressed steel I-beam-concrete composite beams

  • Sung, Deokyong;Hong, Seongwon
    • Steel and Composite Structures
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    • v.42 no.5
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    • pp.671-683
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    • 2022
  • To investigate and predict the long-term time-dependent behavior, such as creep, shrinkage, and relaxation of PS strands, and prestress loss in prestressed steel-concrete composite beams, named Precom, full-scale tests were conducted and the collected data were compared with those obtained from the two proposed analytical models. The combined effective modulus method (EMM)-empirical model proposed with a flowchart considered the creep effect to determine the prestress loss. Conversely, the age-adjusted effective modulus method (AEMM) with CEB-FIP equation was developed to account for the concrete aging. The results indicated that the AEMM with CEB-FIP model predicts the long-term behavior of Precom effectively.

The Long-Term Effect of Pleasantly Designed Interior on Pro-spatial Behavior in Institutional Residence Dining Room-Times Series Analysis of Long Term Field Experiment Data- (시설주거 식당공간의 쾌적성 변화가 아동의 친공간적 행동에 미치는 장기적 영향-장기 현장실험연구 자료의 시계열 분석-)

  • 이연숙;이선미;안지영
    • Korean Institute of Interior Design Journal
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    • no.3
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    • pp.91-99
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    • 1994
  • The purpose of this study was to determine the long term effect of a pleasantly designed interior on pro-saptial behavior. For pleasantly designed interior, the existing interior was remodeled through the change of finishing materials for major architectural elements such as wall, floor and ceiling, and changes of furniture and it's arrangement . Pro-spatial behavior was operationalized as seat arranging behavior and measured through the arranged condition and observable arranging behavior. Time-series design, one of quasi-experimental design was used. The data in this study were extracted from an existing field experimental research. Five hundred survey video tapes record during 2 years period were used. In conclusion, the pleasantly designed environment has a long term effect on the pro-spatial behavior change . While self-centered pro-spatial was improved continuously and even reinforced , altruistic pro-spatial behavior was improved but diminished as time passed. There were no differences in the effect between male and female children. The result of the research provide scientific background of an answer to why Interior Design.

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Nonlinear time-varying analysis algorithms for modeling the behavior of complex rigid long-span steel structures during construction processes

  • Tian, Li-Min;Hao, Ji-Ping
    • Steel and Composite Structures
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    • v.18 no.5
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    • pp.1197-1214
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    • 2015
  • There is a great difference in mechanical behavior between design model one-time loading and step-by-step construction process. This paper presents practical computational methods for simulating the structural behavior of long-span rigid steel structures during construction processes. It introduces the positioning principle of node rectification for installation which is especially suitable for rigid long-span steel structures. Novel improved nonlinear analytical methods, known as element birth and death of node rectification, are introduced based on several calculating methods, as well as a forward iteration of node rectification method. These methods proposed in this paper can solve the problem of element's 'floating' and can be easily incorporated in commercial finite element software. These proposed methods were eventually implemented in the computer simulation and analysis of the main stadium for the Universiade Sports Center during the construction process. The optimum construction scheme of the structure is determined by the improved algorithm and the computational results matched well with the measured values in the project, thus indicating that the novel nonlinear time-varying analysis approach is effective construction simulation of complex rigid long-span steel structures and provides useful reference for future design and construction.

Development of GPS Monitoring System for Behavior Analysis of Long Span Bridge (장대교량의 거동분석을 위한 GPS 모니터링시스템 개발에 관한 연구)

  • Choi, Byoung-Gil;Cho, Kwang-Hee;Na, Young-Woo
    • Journal of Korean Society for Geospatial Information Science
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    • v.16 no.3
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    • pp.111-117
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    • 2008
  • This study aims to develop a system which is able to monitor and analyze behavior of long span bridge in real time using multiple GPS. Through setting up many GPS at the important points of long span bridge and measuring displacement in real time, over all behavior of bridge could be analyzed. Behavior analyzing system developed in this study is able to digitize and visualize the overall and points displacement of bridge and deal with events actively. Also it is able to calculate statistical data related to analyze behavior through the constructing a database of measuring data.

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A 12-year long-term study on the external deformation behavior of Geosynthetic Reinforced Soil (GRS) walls

  • Won, Myoung-Soo;Lee, O-Hyeon;Kim, You-Seong;Choi, Se-Kyung
    • Geomechanics and Engineering
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    • v.10 no.5
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    • pp.565-575
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    • 2016
  • Geosynthetics reinforced soil (GRS) walls constructed on weak grounds may change in both the horizontal earth pressure and deformation on wall facing. However, only few studies were done in the literature to measure and analyze the horizontal external deformation behavior of GRS walls constructed on soft grounds for a long period of time. The present study describes the external deformation behavior of GRS walls observed for 12-year long-term performance. The horizontal deformation of the geosynthetics-wrapped-facing GRS walls shows a passive behavior along one third of the wall height, from top going downwards, and active behavior for the rest of the wall height. Even if the geogrid and nonwoven geotextiles are exposed directly to sunlight and rainfalls in a span of 12 years, they have functioned well as wall facing. Therefore, the geosynthetic reinforcement material is strong enough to resist ultraviolet rays.

Experimental Study for the Long-term Behavior of Shear Wall (전단벽의 장기거동 특성에 관한 실험적 연구)

  • 권승희;김진근
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.11a
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    • pp.197-202
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    • 2001
  • It is necessary to Investigate long-term behavior of vertical members such as column and shear wall because the long-term behavior induces the serviceability problem of reinforce-concrete structures. However, the long-term behavior on shear wall has not been fully studied. Experimental works are performed to understand the time dependent behavior of shear wall, especially the effect of loading area in this research. Three different types of cross sections are adopted, i.e., 10$\times$10 cm, 10$\times$30 cm, and 10$\times$50 cm with the same loading area of 10$\times$10 cm. The creep strains were different from point to point in the section of the shear wall specimen because of the nonlinear stress distribution. The effect of the nonlinear stress distribution was larger in the specimen with the larger width.

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