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이병익,정위곤,이창호 龍仁大學校 武道硏究所 2002 武道硏究所誌 Vol.13 No.1
The purpose of this study is to analyze the The Influence of Participation in Taekwon-do Training on Juvenile Delinquency To accomplish the purpose of this study, the 321 subjects were selected using the systematic stratified cluster random sampling method from students who study in middle and high school in Seoul 2002. The Survey questionaries were used to collect data. The questionaries for Participation in Taekwon-do Training was Sport Participation and degree on Scale developed by Kenyon and Schuts(1970). And the questionaries for Juvenile Delinquency scale was Expansion developed by Jung(1988) and Lim(1986). The statistical methods utilized in this study for analyzing the collected data were reliability analysis, descriptive statistics, Chi-Square, t-test, One-way ANOVA, and standard multiple regression analysis. From the analysis of this study, the following conclusions were obtain:. Firstly, adolescent' Taedkwon-do Training participation and degree, juvenile delinquency are partially different by the socio-demographic characteristics. In detail, adolescent' Taekwon-do Training participation is different according to income, parent education level, parent job style. Secondly, adolescent' Taekwon-do Training participation are different according to juvenile delinquency. In detail, the Taekwon-do Training participation group are lower in the delinquency of family, school, and social life than the non-participation of Taekwon-do Training group Thirdly, Taekwon-do Training participation degree are partially influence on the juvenile delinquency. In detail, Taekwon-co Training participation frequence and strength effective adolescent' on the delinquency of family, school, and social life.
Olofsson, Niklas,Ek-Weis, Johan,Eriksson, Anders,Idda, Tonio,Campbell, Eleanor E B IOP Pub 2009 Nanotechnology Vol.20 No.38
<P>The electromechanical properties of arrays of vertically aligned multiwalled carbon nanotubes were studied in a parallel plate capacitor geometry. The electrostatic actuation was visualized using both optical microscopy and scanning electron microscopy, and highly reproducible behaviour was achieved for actuation voltages below the pull-in voltage. The walls of vertically aligned carbon nanotubes behave as solid cohesive units. The effective Young’s modulus for the carbon nanotube arrays was determined by comparing the actuation results with the results of electrostatic simulations and was found to be exceptionally low, of the order of 1–10 MPa. The capacitance change and <I>Q</I>-factor were determined by measuring the frequency dependence of the radio-frequency transmission. Capacitance changes of over 20% and <I>Q</I>-factors in the range 100–10 were achieved for a frequency range of 0.2–1.5 GHz. </P>
Growth of aligned MWNT arrays using a micrometer scale local-heater at low ambient temperature.
Dittmer, S,Ek-Weis, J,Nerushev, O A,Campbell, E E B American Scientific Publishers 2010 Journal of Nanoscience and Nanotechnology Vol.10 No.6
<P>Ambient room temperature growth of aligned multi-walled carbon nanotube arrays on micrometer scale local heaters is demonstrated. High growth rates of up to 8.8 microm per second have been achieved and the growth has been monitored in situ using optical microscopy. The growth starts and ends abruptly over the length of the local heater. The terminal length of the nanotubes shows a clear dependence on growth temperature and small inhomogeneities in temperature across the heater are seen to lead to interesting microstructure of the arrays. The activation energy for growth was seen to be consistent with earlier reports for acetylene growth of nanotubes on iron catalysts.</P>