• Title, Summary, Keyword: Panel test

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An Experimental Study for Vertical Flame Spread Analysis of Aluminum Composite Panel (알루미늄 복합 패널의 수직 화염전파속도 분석을 위한 실험적 연구)

  • Kim, Il-Kwon;Kim, Bong-Chan;Ku, In-hyuck;Seo, Dong-Gu;Lim, Nam Gi;Kwun, Young-Jin
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.315-317
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    • 2013
  • To analyze vertical fire spreadability of aluminum composite panel, real scale test of aluminum composite panel and fire retardant aluminum composite panel was conducted as well as analysis of domestic code, test and domestic reaserch resulted in following conclusion. Fire spread risk assessment of aluminum Composite Panel is impossible with the current regulations (Cone Calorimeter Test). It need to changes of regulatory and combustion expanded risk assessment and regulatory changes in the test methods need to be judged. Also, there is quite a big different between the general aluminum Composite Panel and semi-non combustible of aluminum Composite Panel. However it is also deemed to be danger when present in the sidewall to the top consisting of fire spread. From now on, it is needed the study about interpretation of fire spread and sidewall of vertical fire spread analysis not only experiments for aluminum Composite Panel.

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Test of Homogeneity for Intermittent Panel AR(1) Processes and Application (간헐적인 패널 1차 자기회귀과정들의 동질성 검정과 적용)

  • Lee, Sung Duck;Kim, Sun Woo;Jo, Na Rae
    • The Korean Journal of Applied Statistics
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    • v.27 no.7
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    • pp.1163-1170
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    • 2014
  • The concepts and structure of intermittent panel time series data are introduced. We suggest a Wald test statistic for the test of homogeneity for intermittent panel first order autoregressive model and its limit distribution is derived. We consider the fitting the model with pooling data using sample mean at the time point if homogeneity for intermittent panel AR(1) is satisfied. We performed simulations to examine the limit distribution of the homogeneity test statistic for intermittent panel AR(1). In application, we fit the intermittent panel AR(1) for panel Mumps data and investigate the test of homogeneity.

A Test for Autocorrelation in Dynamic Panel Data Models

  • Jung, Ho-Sung
    • Proceedings of the Korean Statistical Society Conference
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    • pp.167-173
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    • 2005
  • This paper presents an autocorrelation test that is applicable to dynamic panel data models with serially correlated errors. The residual-based GMM t-test is a significance test that is applied after estimating a dynamic model by using the instrumental variable(IV) method and is directly applicable to any other consistently estimated residuals. Monte Carlo simulations show that the t-test has considerably more power than the $m_2$ test or the Sargan test under both forms of serial correlation (i.e., AR(1) and MA(1)).

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A TEST FOR AUTOCORRELATION IN DYNAMIC PANEL DATA MODELS

  • Jung, Ho-Sung
    • Journal of the Korean Statistical Society
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    • v.34 no.4
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    • pp.367-375
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    • 2005
  • This paper presents an autocorrelation test that is applicable to dynamic panel data models with serially correlated errors. The residual-based GMM t-test is a significance test that is applied after estimating a dynamic model by using the instrumental variable (IV) method and is directly applicable to any other consistently estimated residuals. Monte Carlo simulations show that the t-test has considerably more power than the $m_2$ test or the Sargan test under both forms of serial correlation (i.e., AR(1) and MA(1)).

Dymamic Behavior of Large Concrete Panel Structures Subjected Seismic Loads (지진하중을 받는 대형 콘크리트 판구조의 동적거동-3층 입체구조의 진동실험결과를 중심으로)

  • 서수연;박병순;백용준;이원호;이리형
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.148-153
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    • 1993
  • The paper presents the results of shaking table test conducted on the 1/3.3 scaled large concrete panel model. The behaviors of large concrete panel structures subjected to seismic excitations are controlled by capacity of horizontal and vertical joints. To Study the seismic capacity of the large concrete panel structures, experimental researches for joints and structural assemblage are needed. Especially, since the magnitude of seismic loads are depended on the variation of time, period and accelerations, dynamic test is needed for estimating the seismic resistance of large concrete panel structures. The objective of this paper is to study the behaviors of large concrete panel structures on seismic excitations and to estimate the safety. Test results are as follows : 1) Test model was critically damaged in the first floor horizontal joint by rocking. 2) Elastic limit(0.12kg) of test model was 5times higher than that of korean seismic design code. 3) Maxium base shear of test model at the ground acceleration of 0.12g was 3.5 times higher than the result of equivalent static analysis. 4) Damping ratio of test model turned out 3.9~5.3% and the period at 0.12g was 0.065sec.

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Characterization of Durability of PC panel by Accelerating Test in Deterioration Chamber and Long-Term Field Exposure Test (촉진열화 및 장기폭로시험에 의한 고성능 PC패널의 내구성능 및 열화특성)

  • Ma, Sang-Joon;Jang, Pil-Sung;Choi, Jae-Suk;Ju, Jung-Min
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1549-1554
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    • 2008
  • In this paper, The evaluation of durability of the PC Panel lining for tunnel structure was examined through the rapid test by carbonation and freezing and thawing. Also for the purpose of improvement of durability. Namely, the durable characteristics of PC Panel lining by carbonation and freezing and thawing, was evaluated by rapid test and long-term field exposure test and main influence factors were derived. As a result of test, Correlation of accelerating test in deterioration chamber and long-term field exposure test, it will be expected that the proposed correlation well to the prediction of life expectancy of structure and is contributed greatly in the future.

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Electric Current Accelerated Degradation Test Design for OLED TV (OLED TV Panel의 전류가속열화시험 설계)

  • You, Ji-Sun;Lee, Duek-Jung;Oh, Chang-Suk;Jang, Joong Soon
    • Journal of Applied Reliability
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    • v.17 no.1
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    • pp.22-27
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    • 2017
  • Purpose: The purpose of this study is to estimate the life time of OLED TV panel through electric current ADT(Accelerated Degradation Test). Methods: We performed accelerated degradation test for OLED TV Panel at the room temperature to avoid high temperature impact on the luminance. Results: we got more accurately the life time of the OLED TV when we applied ADT without temperature factor than including both current and temperature. Conclusion: Until now, the ADT of the OLED TV has been conducted with temperature and current at the same time for reducing test time and costs. We estimate incorrect life time when the temperature is adopted as an accelerated factor. Due to the high temperature impact on the luminance of the OLED TV panel. So as to solve this problem, we discard temperature and use electric current only.

An Evaluation of the Fatigue Properties for External Panel Using Low Density SMC (저비중 SMC 외장패널의 피로특성 평가)

  • Kim, Eun-Sung
    • Journal of The Korean Society of Manufacturing Technology Engineers
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    • v.21 no.5
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    • pp.830-835
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    • 2012
  • A research for application of LDSMC(Low Density Sheet Molding Compound) composite is in progress for lightening the weight. This paper has performed fatigue test and simulation of external panel for Korean commercial vehicle. Before the fatigue test, static test was carried out. From the test, the structural safety was investigated using Goodman diagram. After the static test performance, the fatigue test was conducted at a range of load frequency 5Hz, a stress ratio(R) of 0.05 and an endurance limit of $10^6$ to obtain the S-N curve. The S-N curve is applied to the fatigue analysis of the external panel assembly. The result of FEM analysis was in accord with the experimental result within 83% confidence. It showed that the process to set up the safety range of allowable error is required in process of the design and simulation verification.

Comparison between homogeneity test statistics for panel AR(1) model (패널 1차 자기회귀과정들의 동질성 검정 통계량 비교)

  • Lee, Sung Duck;Kim, Sun Woo;Jo, Na Rae
    • The Korean Journal of Applied Statistics
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    • v.29 no.1
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    • pp.123-132
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    • 2016
  • We can achieve the principle of parsimony and efficiency if homogeneity for panel time series model is satisfied. We suggest a Rao test statistic and a Wald test statistic for the test of homogeneity for panel AR(1) and derived the limit distribution. We performed a simulation to examine statistics with the same chisquare distribution when number of the individual is small and in common with large. We also simulated to compare the empirical power of the statistics in a small panel. In application, we fit panel AR(1) model using regional monthly economical active population data and test homogeneity for panel AR(1). It is satisfied homogeneity, so it could be fitted AR(1) using the sample mean at the time point. We also compare the power of prediction between each individual and pooled model.

A Study on the development and application of air-passing soundproofing wall (통풍형 방음벽 개발 및 적용에 관한 연구)

  • Yoon, Je-Won;Kim, Young-Chan;Kim, Keum-Mo;Jang, Kang-Seok;Ku, Bon-Sung;Eom, Joo-Yong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.658-663
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    • 2011
  • The purpose of this study is to develop an air-passing soundproofing panel with more improved structure to reduce the $CO_2$ emission and installation cost. To reduce the emission of $CO_2$ ; it is suggested to choose low $CO_2$ emission material relative to the aluminum and to reduce the materials by developing a specially designed air-passing soundproofing panel structure. First of all, we performed the flow analysis to predict the wind pressure according to the open angle of the air-passing soundproofing panel and the noise level analysis at the receiver point. To verify the simulation, a prototype of the soundproofing panel was made. The flow test in the wind tunnel and load test were performed. The economic evaluation for the installation of the air-passing soundproofing panel was performed and specifications of the installation was prepared. As the results of this research, it was verified that the wind load was reduced about 40% to that of the conventional one at 25m/s wind speed in the wind tunnel test. By applying the 4m span soundproofing wall with air-passing soundproofing panel and under the cost of 250 thousand $won/m^2$ instead of the conventional 2m span panel, the installation cost will always be lowered than the conventional one in the combination of (60:40~50:50) conventional to air-passing soundproofing panel from the economic evaluation. The 20% reduction of $CO_2$ was found by changing the 50% of aluminum soundproof panel to air-passing soundproofing panel.

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