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전종국,김동연,최선남 大邱大學校 再活科學硏究所 1993 再活科學硏究 Vol.11 No.1
The purpose of this study was to investigate the effect on socio-democratic variables psychological variables on the positive self-concept of mothers in the families which has mentally retarded children. 380 mothers with mentally retarded children attending special schools in Seoul, Pusan, Taegu, Sunchon, Chongju, Chonju, Kwangju were employed in this study. The questionnare consisted of the items developed by Jung(1968) to measure mothers' self-concept, and the items to examine socio-psychological variables. Data were analyzed by regression analysis, cannonical analysis, and anova. The results of this were summerized as follows: The criterian variable(total self-concept) was explained by the satisfaction of family life, marrital life, health, husband's level of education, and family income. As a result, psychological varibales had greater effect on self-concept than socio-democratic varibles did. The physical self-concept and family self-concept of all 5 self-concept variables were only explained by the satisfaction of health and family life of all 5 psychological variables. The different psychological variables had different effect on self-concept variables. The family size, spuose's occupation, kind of the mentally retarded children, and the occurance of the mentally retarded showed significant differences in self-concept.
정지영,정경채,김병호,김태준,최종현,박남국 한국공업화학회 2002 응용화학 Vol.6 No.2
An experimental study for the investigation of the sodium-steam reaction phenomena was carried out. No significant aggressive explosion phenomena were observed as compared with that of sodium-water reactions. It was also observed that the rate of increase of reaction temperature decreases with increasing initial temperature of liquid sodium and that the temperature of the target depends upon the flow rate of injected steam.
Effects of Annealing Sequences on Ferroelectric Properties of Nb-Doped Bismuth Titanate Thin Films
Jong Kuk Kim,Jinheung Kim,Eun Kyung Choi,Jong-Hwa Kim,Sang Su Kim,Tae Kwon Song 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
Nb-doped Bi4Ti3O12 (Nb-BIT) ferroelectric thin lms were prepared on Pt/Ti/SiO2/Si substrates by metalorganic solution deposition (MOSD) method. A nonionic block copolymer was used in the preparation of the precursor solutions in order to give a random orientation of crystal grains. Two annealing methods of conventional furnace annealing (CFA) and rapid thermal annealing (RTA) were compared to investigate dierences in microstructures, phase formations and ferroelectric properties of the crystallized Nb-BIT thin lms. Also, the eects of pre-heating at 500 C by RTA before the nal annealing steps at 700 C were studied. The lm crystallized at 700 C by CFA with pre-heating at 500 C by RTA showed good ferroelectric properties with random orientation and remanent polarization Pr = 26 C/cm2 at a maximum applied eld of 200 kV/cm. The pulse polarizations (P = P .. P^) decreased about 30 % of initial value after being subjected to 1.51010 read/write cycles at a frequency of 1 MHz.
Choi, Jong Hwan,Choi, Jae Hyuk,Lee, Yoo Jin,Lee, Hyung Ki,Choi, Wang Yong,Kim, Eun Soo,Park, Kyung Sik,Cho, Kwang Bum,Jang, Byoung Kuk,Chung, Woo Jin,Hwang, Jae Seok WJG Press 2014 World journal of gastroenterology Vol.20 No.25
<P>To compare outcomes using the novel portable endoscopy with that of nasogastric (NG) aspiration in patients with gastrointestinal bleeding.</P>