• Journal of the Korean Society of School Health
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• v.27 no.3
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• pp.189-195
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• 2014

Purpose: This survey was to investigate the differences in smartphone addiction symptoms by the level of addiction among college students in S. Korea. Methods: Two hundred and thirteen university students survey data was collected from December 5th to 9th of 2011 using Smartphone Addiction Scale. 25.3% (n=54) of total respondents were categorized as highly addicted and 28.17% (n=60) were as non-addicted group. Results: There were significant differences in total addiction symptom scores, daily life disorders, loss of self control, pathological concentration, and compulsive symptoms between two groups. There were significantly differences in total addiction symptoms, daily life disorders, loss of self control, pathological concentration, and compulsive symptoms between two groups. Highly addicted group were significantly higher in total addiction symptom scores (3.26 times), daily life disorders (4.96 times), loss of self control (3.07 times), pathological concentration (3.07 times), and compulsive symptoms (2.86 times) compared to non-addicted one. Highly addicted group had significantly higher daily usages of smartphone and were more satisfied with smartphone than non-addicted group. The purpose to use was related to academic works rather than games or entertainment. However satisfaction on academic achievement was very low. Conclusion: The smartphone addicted symptoms related to academic works were significantly high in highly addicted college students so that it disturbed their daily life and psycho-social health in general. It is clear that the highly addicted college students need urgent distinctive interventions such as creative academic guides.

• Journal of Drive and Control
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• v.9 no.2
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• pp.8-14
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• 2012

Electro-hydraulic spring return actuator(ESRA) is utilized for air conditioning facilities in a nuclear power plant. It features self-contained, hydraulic power that is integrally coupled to a single acting hydraulic cylinder and provides efficient and precise linear control of valves as well as return of the actuator to the de-energized position upon loss of power. In this paper, the algebraic equations of ESRA at steady-state have been developed for the analysis of static characteristics that includes control pressure and valve displacement of pressure reducing valve, flow force on flapper as well as its displacement over the entire operating range. Also, the effect of external load on piston deviation is investigated in terms of linear system analysis. The results of static characteristics show the unique feature of force balance mechanism and can be applied to the stable self-controlled mechanical system design of ESAR.

• Korean Journal of Adult Nursing
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• v.14 no.1
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• pp.53-61
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• 2002

Purpose: This descriptive study was designed to investigate Body Mass Index(BMI), weight control behavior, and self-esteem in high school adolescents. Method: The convenience sample consisted of 129 high school females and 106 high school males. Data were collected using a self-report questionnaire from November to December, 1999. BMI was calculated by using the subject's self-reported body weight and height to identify objective obesity. Self evaluation about subjective obesity was measured by a single item question. Preferred BMI was calculated by using the subject's elf-reported body weight and height which the subjects desired. The Rosenberg's Self-Esteem Scale was utilized to measure the level of self-esteem. Results: Results of the study revealed that high school females perceived themselves as more more obese than their the actual BMI, excessively participated in dieting behavior and exercises, and reported lower self-esteem than that of males. Conclusion: Based on this study, health care providers need to educate female adolescents about healthy behavior as well as the normal weight range in BMI.

• Asia Marketing Journal
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• v.8 no.3
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• pp.41-74
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• 2006

It is frequently observed that consumers' behavior and performance in their weight control are greatly affected by the degree of self-control by the consumers themselves. In other words, effective weight control behavior is only possible when the consumers invest a substantial amount of endeavors and self-control. The present study empirically investigated the effect of the self-image congruence and subjective norm formed by self- concept reflected in weight control behavior on weight control attitude formation, actual behavior, and performance. For more in-depth research, rather than simply showing differences in performance based on self-control, the present study divided the subjects into high and low self-control groups for a comparative purpose. Based on empirical research employing general consumers and those who were engaged in an actual weight loss program at professional weight control centers as subjects, the study found the following results: First, for both high and low self-control groups, self-image congruence significantly affected attitude toward weight control, but not the actual weight control behavior. The results indicate that in weight control, the actual behavior must be preceded by the attitude. Second, subjective norm directly affected both attitude toward weight control, and behavior for the low self-control group while it affected the behavior only for the high self-control group. The results show that the lower self-control is, the more powerful the effect of referents is. Third, weight control attitude positively affected weight control behavior only for the high self-control group. Fourth, weight control behavior significantly affected the performance for both high and low self-control groups. Compared to the low group, the high self-control group showed more powerful effect of behavior, suggesting the crucial role of self-control in successful weight control. The results also imply that the role of referents is relatively more important for the low self-control group.

• Korean Journal of Adult Nursing
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• v.21 no.6
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• pp.718-732
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• 2009

Purpose: This study was conducted to discover the essence and the structure of the experiences of weight control by nursing students. Methods: Participants were 12 nursing students who had tried losing weight at C university in Busan, Korea. The data were collected from June 17 to August 6, 2006. For the purpose of this study, focus group discussions and in depth interviews were employed. Results: The collected data were analyzed by using Giorgi's method. As the results of the analysis, the following four components of experience were derived: My appearance looked abnorml; Measures for self-realization; Pursuit of my own way only; Feelings of accomplishment and self confidence. Conclusion: It is necessary to develop an effective weight control program with minimized side effects that are harmful to health, based on the components of the nursing students' experiences in weight control that were identified in this study.

• Korean Journal of Child Studies
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• v.18 no.2
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• pp.163-176
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• 1997

Using survey data collected from 275 adolescent children of widowed or divorced single mother families, this study investigated the characteristics of family coping resources, including individual, financial, social, and mother-child relational resources and their effects on the psychological wellbeing of these adolescents. After controlling background variables of the family, higher depression among adolescents was associated with low grade point average, mother's high exposure to negative experiences after loss of father, low attachment to mother, and low sense of self-control. Furthermore, higher grade point average, strong attachment to mother, and high self-control in problem solving were factors predicting higher self-esteem of adolescents. Social network resources were not related to the psychological well-being of the adolescents. Discussion included recommendations for future research. Implications for policy and parent-child relations were discussed with a view to enhancing family functioning of adolescents in single-mother families.

• Journal of Industrial Convergence
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• v.6 no.1
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• pp.17-33
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• 2008

The purpose of this study is to examine what sort of causes have the effect on the coping behavior of the unemployed against their job loss. For the purpose of the study, following independent variables have been selected, locus of control, self-efficacy and autotelic personality. As dependent variables, two types of coping behaviors of individual have been used, problem-focused coping strategies and symptom-focused coping strategies. To test the hypotheses, structural equation modeling was employed. The model showed adequate fit to the data. The results of structural equation modeling exhibit that internal locus of control, self-efficacy and autotelic personality were positively related problem-focused coping strategies. And self-efficacy was negatively related to symptom-focused coping strategies. Implications are discussed and future research directions are outlined.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.154-156
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• 2020

전기제품의 대기전력을 0.005W 미만으로 구현 할 수 있는 새로운 스위칭 제어 방법을 본 논문에서 제시하며 최소한의 소비전력을 구현하면서 제품의 기능을 유지 할 수 있는 방안에 대한 결과를 설명한다. 또한 실제 상용화되는 모니터에서의 동작원리를 설명하고 구현된 동작 특성을 바탕으로 제안한 회로의 동작원리 및 대기전력 수준을 검증한다.

• Journal of the Korean Society of School Health
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• v.27 no.3
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• pp.196-202
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• 2014

Purpose: The purpose of this study was to identify the mediation of self-esteem between body image and depression among female university students. Methods: This was a cross-sectional survey design. We collected 193 female university students. They was completed a self reported questionnaire including demographic characteristics, body image, self-esteem and depression. Data were collected using self-report questionnaires and analyzed with the SPSS 20.0 Program. Results: The mean age was 21.3 years old. Over 58% of subjects hoped for plastic surgery, and 78.8% had experienced weight loss control. There were a positive correlation between body image and self-esteem (r=.60, p<.001), and negative correlations between body image and depression (r=-.47, p<.001), self-esteem and depression (r=-.50, p<.001). Self-esteem had a partial mediating effect in the relationship between body image and depression of female university students. Conclusion: Based on the findings of this study, depression management program focusing on body image management and self-esteem improvement are recommended to control depression in female university students.

• Journal of the Korea Society of Computer and Information
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• v.13 no.2
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• pp.159-166
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• 2008

The purpose of this study is to examine the usage of time for internet game in students of college and analyse the addiction and verify the relation between elements of the capacity of self-control and internet game addiction. The result show that the use time and the duration of daily internet game have influence on the internet game addiction(p<0.05) and also show that they have highly influence(+) on the relation elements of self-control : the trouble of studies, the loss of human relation, the confusion between the real and virtual, and the escapism.