• Proceedings of the KSR Conference
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• 2003.10b
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• pp.563-568
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• 2003

High-speed railway bridges subject to effect of dynamic loads by interaction between vehicle load which run specially fast and behavior of bridges. Such dynamic load effects result in fluctuations and fatigues to each elements as well as whole conduct of bridges. and is influenced in life of bridges. For these reason. Analysis and estimation of data about dynamic behavior of bridges occupies important factor in that estimate the remaining life of bridges and select the maintenance. repair and retrofit. In this paper. Analysis for the dynamic behavior of bridges using displacement and acceleration data that is actuality measure data to the bridges of Seoul-Susan high speed railroad test section has been made.

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2004.05a
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• pp.186-189
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• 2004

Although magnesium has high potential for structural material due to the lightweight and high specific strength, the structural application has been limited by the low ductility at room temperature. The reason of the poor ductility is few activated slip systems of magnesium (HCP structure) during deformation. As temperature increases, however, additional non-basal slip systems are incorporated to exhibit higher ductility comparable to aluminum. In the present study, a series of tensile tests of Mg-Al alloy has been carried out to study deformation behavior with temperature variation. Analysis of load relaxation test results based on internal variable approach gave information about relationship between the micromechanical character and corresponding deformation behavior of magnesium. Especially, the material parameter, p representing dislocation permeability through barriers was altered from 0.1 to 0.15 as the non-basal slip systems were activated at high temperature.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 2001.04a
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• pp.361-367
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• 2001

This research aims at evaluating the seismic performance of the R/C bridge piers, which were seismically designed in accordance with the seismic provision of limited ductile behavior of Eurocode 8. Pseudo dynamic test for six(6) circular RC bridge piers has been carried out so at to investigate their seismic performance subjected to experted artificial earthquake motions. The objective of this experimental study is to investigate the hysteretic behavior of reinforced concrete bridge piers. Important test parameters are confinement steel ratio, input ground motion, etc. The seismic behavior of circular concrete piers under artificial ground motions has been evaluated through displacement ductility, energy analysis, capacity spectrum. It can be concluded that RC bridge piers designed in the seismic code of limited ductile behavior of Eurocode 8 have been determined to show good seismic performance even under expected artificial earthquakes in moderate seismicity region.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05a
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• pp.62-65
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• 2006

This study investigated the behavior of R/C column confined with headed crossties subjected to eccentric loading. The 16 specimens are designed to have adequate confinement steel, determined by ACI seismic design. The variables studied in this research test are eccentricity to depth ratios, spacing of lateral steel and the anchor type of end of crossties. From the test results, all columns showed similar behavior up to the peak load but those columns laterally confined with head presented more ductile behavior after the peak load. The comparisons indicate that the flexural behavior of confined-concrete columns can be computed resonable accurately by P-M interaction curve.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.05a
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• pp.122-125
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• 2006

This paper presents the comparison of the bond behavior of various FRP rebars. A total of 9 specimens including steel reinforcement were tested through direct pull-out test procedure. The test results have revealed that the bond behavior was affected by the deformation shapes and surface treatments. The newly proposed FRP rebar by KICT showed good bond strength and ductile behavior after failure.

• Journal of the Korean Society of Costume
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• v.54 no.7
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• pp.15-26
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• 2004

The internet is one of the modern facilities that has been diffused very rapidly in recent years and tremendously influenced on our life. Although the adolescents are major users of internet, the literature in clothing and textile area has not addressed the relationships between adolescents' internet use and clothing behavior, The purpose of this study was to examine the differences of adolescents clothing behavior. purchase evaluative criteria, and information source according to the use of internet. Descriptive statistics, t test, Analysis of Variance (ANOVA), and Duncan test were employed to analyze the data collected from the convenience sample of 572 middle and high school students in Gyeongnam, Korea. The use of internet was partially related to the adolescents' clothing behaviors. purchase evaluative criteria. and information source. Also, it was observed that the frequency and purpose of fashion website tended to be related more than the amount and purpose of internet did. Marketing implications from the results were suggested.

• Fashion & Textile Research Journal
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• v.3 no.1
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• pp.61-69
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• 2001

The purpose of this study was to analyze the purchasing behavior related factors of Small Store User in Yhasi street of Dong-Sung Ro, Daegu. Frequency, $X^2$-test MANOVA, ANOVA and Duncan multiple range test were used to analyze the sample. The results of this study were as follows: 1) The largest sample were as follows: un married female, college students of twenties, 101-200 thousand won for salaries. 2) The factors of purchasing behavior were classified into 8 factors, enjoy shopping, store image, unique goods, culture space, salesperson, low price, information seeking, value via price orientation. 3) There were significant differences found between attitude on information source, number of seeking store, music in shop, music sound, size, display, price, street, in their factors of purchasing behavior (unique goods, value via price, low price, store image, enjoy shopping) 4) There were significant differences found between demographic characteristics (personal sales, location, transportation) in their factors of purchasing behavior (salesperson, cultural space, store image).

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.12
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• pp.2011-2018
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• 2003

To analyze the bending collapse behavior of an aluminum square tube beam under a bending load, a finite element simulation for the four-point bending test has been performed. Using an aluminum tube beam specimen partly inserted with two steel bars, the local buckling deformation near the center of the tube beam was induced. The maximum bending load and the bending collapse behavior obtained from the numerical simulation were in good agreement with experimental results. Using a combination of the four-point bending test and its finite element simulation, analysis of the local buckling and the accompanied bending collapse behavior of aluminum tube beam could be quantitative accomplished.

• The International Journal of Costume Culture
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• v.9 no.1
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• pp.52-59
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• 2006

The purposes of this study were to investigate and to compare the actual state of clothing gift giving behavior according to gender. A survey using questionnaire was conducted on 417 university students in the Cheongju area, Korea. The questionnaire was composed of questions concerning demographic factors, clothing gift giving behavior and purchasing behavior, and of multiple choice and 5-point scales depending on the characteristics of the questions. Frequency, descriptive analysis, x$^2$-test and t-test were used for a data analysis. Most of the students had experience of giving the clothing for a gift more than once during the year. They usually purchased the clothing for their parents and Fiends. The items of clothing were low purchasing risk items like sweater, T-shirts, underwear and shirts or blouse. The main reason for purchasing clothing gift for their parents and friends was based on mostly practical motivation.

• Journal of Industrial Technology
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• v.26 no.B
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• pp.101-110
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• 2006

The purpose of this study was to investigate the flexural, interfacial behavior, crack propagation, nonlinear behavior, effect repaired and rehabilitated with VES-LMC using RC beam with 4-point-loading test. The results were following: The test result showed that repair and rehabilitation effect increased as its depth increased, which was verified by the increase of flexural stiffness. More than 40% of stiffness was improved when the depth of repair was up to steel position. However, there was a little difference between 8cm and 12cm repaired beam. This means the repair depth must be considered. The interfacial behavior data showed that the repaired or rehabilitated beams had a little relative displacement. This means that two materials behave comparatively acting together. This suggested that interface treatment were one of the most important jobs in composite beams.