• Journal of Korean Society of Transportation
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• v.23 no.4 s.82
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• pp.7-16
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• 2005

Rejected Takeoff Accidents are not common. but if occurred, it leads to big disaster From the year of 1959, when Jet Transport service opened, to the year of 2000, Rejected Takeoff accidents/incidents occurred total of 94 cases. All cases led to overrun, and major cause is to initiate stopping maneuvers over $V_1$, takeoff decision speed, according to National Transport Safety Board of America. Similar results are represented in Aviation Safety Reporting System of National Aeronautics and Space Administration. So I believe that it is worth studying if Airplane Flight Manual, which is the reference Performance criteria, is appropriate to operations of line pilots. The definition of $V_1$ has been revised a couple of times and Rejected Takeoff Certification Standards for Transport Airplanes was changed in 1998. It shows that up to now there are some portions unreasonable. This study focused on gathering the pilot's tendency for current Rejected Takeoff Procedures of K airlines and analyze the factors they concern. I chose B777 airplane and actually measured the recognition and reaction time of the rejected takeoff transitions through Simulators. And compared the results with the data of flight test and Airplane Flight Manual.

• Journal of Korean Academy of Nursing
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• v.19 no.1
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• pp.81-91
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• 1989

This descriptive-comparative study attempted to examine the differences according to the year in college of 288 junior college nursing students attitudes about mental illness. The instrument used for this study was the OㆍMㆍI (Opinion about Mental Illness) scale developed by Cohen and Struening. Data collection was done from the 27th to the 30th of September, 1988 by means of a questionnaire. Data were analyzed by computer, using the t-test and Analysis of Variance. The finding of this study are as follows : 1. Hypothesis I: “There will be a difference in attitudes toward mental illness according to the year in college 1"There will be a difference in the attitude about authoritarianism-according to the year in college" was rejected(F＝.5675, P＝.5676). 2 "There will be a difference in the attitude about benevolence-according to the year in college." was accepted(F＝.5376, P＝.5848). 3. "There will be a difference in the attitude about mental hygiene ideology-according to." was accepted (F＝17.3497, P＝.0000). 4. "There will be a difference in the attitude about social restrictiveness-according to" was rejected (F＝1.7416, P＝.1771), 5."There will be a difference in the attitude about interpersonal etiology-according to" was accepted (F＝10.8597, P＝.0000). 2. Hypothesis II : "There will bed difference in attitudes toward mental illness." according to whether or not the student have had clinical practice in the psychiatric ward. 1.There will be a difference in the attitudes about authoritarianism - according to "whether or not the student's have had clinical practice in the psychiatric ward was rejected(t＝.59, p＝.555). 2. "Whether they have had clinical practice at the psychiatric ward or not, There will be difference in the attitudes about benevolence." was rejected (t＝1.34, p＝.182). 3."Whether they have had clinical practice at the psychiatric ward or not, there will be difference of the mental hygiene ideology attitude." was accepted (t＝2.72, p＝.008). \circled4 “Whether they have had clinical practice at the psychiatric ward or not, there will be difference of the social restrictiveness - attitude." was rejected (t＝-.59, p＝.557). 5. "Whether they have had clinical practice at the psychiatric ward or not, there will be difference of to interpersonal etiology-attitude." was accepted(t＝3.55, p＝.001). In conclusion, it was found that the higher the year in College, the more positive the attitudes are about mental hygiene ideology and interpersonal etiology. This study suggests that more positive attifudes about psychiatric illness can be induced by a more effective educational experience. The main limitation of this study was that the sociocultural background of Korea is not considered in the OㆍMㆍI scale.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.22 no.11
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• pp.1101-1110
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• 2011

This paper presents a printed, wideband folded monopole antenna for laptop and tablet computer applications. The proposed antenna is designed to cover bandwidth(2.3~10.6 GHz) of Bluetooth, WiMAX, and UWB system by using the printed folded monopole antenna having asymmetrical line width coupling with a parasitic inverted- L element. Also, wireless LAN band(5.15~5.85 GHz) which interferes with UWB system is rejected by inserting half-wavelength open stub in the folded monopole antenna. -10 dB bandwidth of the fabricated wideband antenna is 2.27~10.6 GHz (4.7:1) and -10 dB band-rejected bandwidth is measured as 700 MHz(5.15~5.85 GHz, 12.72 %). The gain and efficiency of the antenna except for the rejected band are higher than 3.93 dBi and 91.89 % and are measured as -2 dBi and 14.65 % at 5.5 GHz which is band-rejected frequency. The size of the antenna is suitable to install for small space of tablet and laptop computers as 12.75(1 ${\lambda}$/10)${\times}$12(1 ${\lambda}$/11) $mm^2$(${\lambda}$ is free space wavelength at 2.3 GHz). Therefore, we verified that the designed antenna is appropriate for wideband antenna of tablet and laptop PC applications.

• Korean Journal of Child Studies
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• v.22 no.3
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• pp.91-106
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• 2001

This study examined relationships between peer variables and externalizing behavior problems of 290 4th and 5th grade children in elementary school. The children completed the Friendship Quality Scale and the peer nomination questionnaire. Parents and teachers rated behavior problems of children using the Connors' Rating Scale. Results indicated that rejected children had more behavior problems than popular, average, or neglected children. Socio-emotional supports from a close friend and satisfaction with the friend were negatively related to behavior problems. Behavior problems were mainly predicted by low peer acceptance, and behavior problems of rejected children were negatively and strongly related to socio-emotional supports of a close friend. In conclusion, peer rejection was a risk factor and a friend's support was a protective factor for externalizing behavior problems in 4th and 5th graders.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.42 no.1
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• pp.13-19
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• 2010

Four waste paper mills in Korea, where multifractors, devices for fiber fractionation, were installed, were selected to investigate how effectively and how differently the multifractors were used. They all used slot-type screens. Effective fiber fractionations by fiber length were expected by the multifractors, but in reality, they were used for selecting fiber furnishes that were flexible and hydrated. Flakes, which meant large fiber bundles, were rejected effectively by the multifractors. There existed a high regression coefficient between the fiber length differences and the freeness differences of the accepted and the rejected fiber furnishes.

• Korean Journal of Child Studies
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• v.22 no.1
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• pp.1-18
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• 2001

Peer status, friendship, and school adjustment were measured for 326 third and fourth graders (171 boys, 155 girls). School adjustment was assessed by academic performance, and social behaviors were rated by teachers while attitudes toward school were reported by children. Examination of the relative contributions of peer status and friendship to school adjustment revealed both unique and joint explanations. Children's academic performance was mainly explained by peer status; popular children had higher performance than rejected children. Attitudes toward school were more positive for children who reported higher friendship quality. Prosocial behaviors were higher for the popular group and for children with more stable reciprocal friends; aggressive behaviors were higher for the rejected group and competitive children with close friends; withdrawal behaviors were higher for the neglected group and children with few reciprocal friends.

• International Commerce and Information Review
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• v.9 no.1
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• pp.23-41
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• 2007

This paper research the country image, the brand image, consumers' performances and the brand royalty with the path analysis on foreign automobile brands. Our empirical study testify the reliability analysis, the factor analysis and the path analysis with above variables by SPSS 12.0 and AMOS 4.0. The result of this research is that hypotheses H1, H3, H5 were significantly supported, whereas, hypotheses H2, H4 were rejected in the samples of American automobile. and in the samples of Japanese automobile, it was clearly revealed that hypotheses H2, H3, H4 were significantly supported, whereas, hypotheses H1, H5 were rejected. So, in Korean market, we should focus on the brand image strategy more than the country image to make the brand royalty with American automobile products. whereas, Japanese automobile products, another strategy is recommended.

• Journal of the Korean Home Economics Association
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• v.32 no.1
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• pp.119-132
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• 1994

The purpose of this study was to investigate children's self-perceptions of social competence in three different levels of peer status and to determine the degree of congruence between children's perceptions and teachers' ratings of social competence. The subjects were 46 bpys and 44 girls identified as popular neglected and rejected by peers in preschool and in first and second grades. A sociometric test was used to identify children's peer status. Children's self-perceptions were assessed by the social Competence Scale for Young Children and teachers' assessment of children's competence was collected by a rating scale. The data were analyzed by 3-way ANOVA 2-way MANOVA for repeated measures and pearson product-moment correlations. The results showed that children's self-perceptions of social competence were generally positive and not significantly different by peer status and grade level in three of the four domains. For the maternal acceptance domain the degree of acceptance perceived by neglected group decreased with grade while those of popular children increased. The degree of congruence between children's perceptions and teachers' ratings were different by peer status. Popular children's estimation of their social competence was more congruent with teachers but neglected and rejected children overestimated their competence.

• Journal of the Korean Home Economics Association
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• v.44 no.6 s.220
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• pp.71-78
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• 2006

The purposes of this study were firstly to assess the differences of conflict resolution strategies between friends according to children's peer status, and secondly to investigate the relationship of conflict resolution strategies measured by self-report, hypothetical interview, and observation methods. Thirty-four dayds in elementary 5th graders were selected according to peer status and friendship. Collected data were analyzed tv t-test and Spearman's correlation. The results of this study showed that children's conflict resolution strategies differed according to their peer status. Specially, popular children reported using and experiencing compromising/integrating strategies more than rejected children did. Rejected children reported using and experiencing dominating strategies more than popular children did. Secondly, there were meaningful correlations between compromising/integrating and dominating strategies, as measured by self-report, hypothetical interview, and observation methods. However, no relations emerged among avoiding, obliging, and intervention requesting strategies, as measured by self-report, hypothetical interview, and observation methods.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.149-151
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• 2007

For several decades, VSC has gained much attention as one of the useful design tools for handling the practical system with uncertainties or disturbances. Generally, the disturbances in the matching condition can be perfectly rejected via VSC; however, these in the mismatching condition are known to be hardly rejected. There have been some trials on it, in which the resulting controls in fact belong to the class of robust control guaranteeing disturbance ${\gamma}$-attenuation. Therefore, in this paper, we propose a new Variable Structure Control (VSC) for a system with mismatched disturbances. The proposed controller is composed of linear and nonlinear parts; the former plays a role in stabilizing the system and the latter takes care of attenuating the disturbances. The main contribution is to introduce the concept of switching-zone, rather than switching-surface, that is designed through piece-wise Lyapunov functions. The resulting non-convex conditions are formulated with an iterative linear programming algorithm, which provides an excellent performance of almost rejecting the disturbances.