• 한국생활과학회지
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• 제14권2호
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• pp.341-350
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• 2005

The purpose of this research is to identify stereotypes toward the poor drinker held by students. Stereotypes toward the poor drinker were examined at two levels: to assess students' beliefs about the traits of the poor drinker and to categorize the traits into stereotypes. The main results of this study were as follows: 1) Students reported 97 traits associated with the poor drinker. 2) Hierarchical cluster analysis of the trait groupings revealed two high-level clusters: a cluster of 35 positive traits and a cluster of 62 negative traits. Within the positive and negative clusters, 15 middle-level categories, 5 positive categories(a kind patriarch, pure, thrifty and diligent, self-controlled, prudent), and 10 negative categories(isolated, dull, passive, not confidant, unsociable, repressed, unstable, egocentric, naive, childish) were identified. This results suggested that students believed negative stereotypes are more typical than positive ones.

• Journal of Mechanical Science and Technology
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• 제17권11호
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• pp.1650-1658
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• 2003

This paper deals with a novel shunt circuit, which is capable of suppressing multimode vibration amplitudes by using a pair of piezoceramic patches. In order to describe the characteristic behaviors of a piezoelectric damper connected with a series and a parallel resistor-negative capacitor branch circuit, the stiffness ratio and loss factor with respect to the non-dimensional frequency are considered. The mechanism of the shunt damper is also described by considering a shunt voltage constrained by shunt impedance. To obtain a guideline model of the piezo/beam system with a negative capacitive shunting, the governing equations of motion are derived through the Hamilton's principle and a piezo sensor equation as well as a shunt-damping matrix is developed. The theoretical analysis shows that the piezo/beam system combined with a series and a parallel resistor-negative capacitor branch circuit developed in this study can significantly reduce the multiple-mode vibration amplitudes over the whole structural frequency range.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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• pp.249-251
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• 1988

In this paper, the negative ion mobility of $SF_6$ is determined using as a negative ion detector the burst pulse which is triggered in a positive point-plane gap by electrons detached from negative ions near the anode point. The result obtained for the negative ion mobility for zero field at atmospheric pressure is $0.57cm^2v^{-1}s^{-1}$.

• Journal of Microbiology
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• 제39권3호
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• pp.236-239
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• 2001

Group A Streptococcus strain ST4529 is a provisional new ems type which has been recently reported in Malaysia (Jomal, et al. 1999. Energ. Infect . Dis. 5,10-14). This strain was found to be opacity factor (OF) negative with a Tl phenotype. Usually, OF negative strains with T1 phenotypes are associated with acute rheumatic fever. However, strain ST4529 was isolated from the blood of a patient with septicemia. Comparison of the deduced amino acid sequence of the mature hypervariable N-terminus of ST4529 showed only 43% identity with that of M5, the closest matched OF negative strain with a T1 phenotype. Thus, ST4529 most probably encodes a new serospecifically unique M protein which is associated with septicemia rather than pharyngitis infections. The strains with these phenotypes are very important because their sequences should be considered for developing any anti-streptococcal vaccines.

• 아동학회지
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• 제32권5호
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• pp.13-28
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• 2011

This study explored the relationship between parental reaction to children's negative emotions, child's self-regulation and stress-coping behaviors. This study also examined the mediating effect of a child's self-regulation between parental reactions to children's negative emotions and a child's stress-coping behaviors. The sample included 407 elementary school 5th-6th grades and their parents (comprising 407 couples) in Seoul. The research results are summarized as follows. First, parental reactions to children's negative emotions were significantly related to the child's self-regulation and stress-coping behaviors. Secondly, it was also found that parental reactions to children's negative emotion were both partially and indirectly related to a child's stress-coping behaviors through the child's use of self-regulation.

• 대한전자공학회논문지
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• 제10권2호
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• pp.7-15
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• 1973

전압제어형 부성저항소자를 사용하여 말티바이브레이터를 설계할 경우의 안정점 설정과 회로동작 안정성에 관하여 논한다. 즉 직류적으로 한개 혹은 두개의 안정점을 가지도록 설계된 회로가 일시적 흑은 영구적 발진을 일으키는 현상에 대하여 아나로그 계산기의 모의에 의하여 해석하고, 실험적으로 확인함으로써, 부성저항스윗칭회로 설계상의 유의점을 제시한다.

• 가정과삶의질연구
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• 제30권2호
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• pp.189-196
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• 2012

The purpose of this study was to investigate trajectories of relational aggression in preschool children. The latent growth curve model was used to examine relational aggression in 3 to 5 year olds. The participants were 3-year-old children recruited from preschools and daycare centers. The children's verbal ability was assessed by interview and teachers completed measurements of negative emotionality and relational aggression. The findings suggest that relational aggression decreased during the preschool years. Gender, language ability, and negative emotionality showed positive effects on the initial level of relational aggression. Moreover, gender and negative emotionality had negative effects, however, language ability had positive effects on the change rate of relational aggression.

• 아동학회지
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• 제19권2호
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• pp.35-47
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• 1998

Negative life events, self-esteem, perceived social support, and maladjustment were studied longitudinally among late elementary children. Subjects were 241 boys and girls for depression and 258 for antisocial behavior. The instruments were the Adolescent Perceived Events Scale, the Rosenberg Self-Esteem Scale, the Social Support Scale for Children, the Revised Korean Version of the Center for Epidemiologic Studies' Depression Scale, and the Antisocial Behavior Scale. The results showed that the way variables were reciprocally related to one another in patterns over a period of one year differed by internal and external adjustment. For depression, depression at Time 1 had effects on self-esteem, social support, and depression at Time 2. For antisocial behavior, negative life events at Time 1 influenced negative life events, self-esteem, social support, and antisocial behavior at Time 2. The findings were discussed in relation to the effects of negative life events, self-esteem, and perceived social support on maladjustment.

• 아동학회지
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• 제28권4호
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• pp.277-287
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• 2007

Antagonism between the Youngnam and Honam regions of Korea as expressed by adolescents and their parents was studied in 167 parent-adolescent pairs (total 334) of Youngnam residents. Adolescents were middle school students 71 (42.5%) and high school students 96 (57.5%), 90 boys (53.9%), 77 girls (46.1%). The instruments were subjects' self-reported social distance and stereotypes. Data were analyzed by t-test, paired t-test, Pearson's Correlation, and hierarchical regression. Major findings were that : (1) adolescents' social distance was positively associated with adolescent and parent negative stereotypes. (2) Adolescent positive/negative stereotypes were positively associated with parent positive/negative stereotypes. (3) Adolescent negative stereotypes exerted an indirect effect on social distance, controlled by parents' negative stereotypes.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권4호
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• pp.203-209
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• 2002

This paper presents a new control scheme for a DVR(Dynamic Voltage Restorer) system consisting of series voltage source PWM converters. To control negative sequence component of source voltage the detection of negative sequence is necessary. Generally, filtering process is used tn do that. Through this filtering process has some problems. This paper suggests a new method of separating positive and negative sequences. This control system is designed using differential controllers and digital filters, and positive sequence and negative sequences are controlled respectively. The performance of the presented controller and scheme are confirmed through simulation and actual experiment by 2.5kVA prototype DVR.