• 대한전자공학회논문지
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• 제4권3호
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• pp.28-33
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• 1967

트란지스터 착동증폭기의 해석은 이등분 정리의 응용으로 간단히 되며 온도 및 전원전압의 변화에 의한 drfit는 자체보상회로에 의해서 감소시킬수 있다. 베스-에미터전압을 같게하는 기본자체보상회로와 이 전압의 온도계수를 같게 하는 온도자체보상회로를 써서 실험하여 양호한 결과를 얻었으며 이 회로의 조절은 이론치와 잘 일치함을 확인하였다.

• 전자공학회논문지B
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• 제29B권9호
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• pp.76-87
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• 1992

A novel self-organizing fuzzy plus PD control algorithm is proposed, where the proposed controller consists of a typical fuzzy reasoning part and self organizing part in which both on-line and off-line algorithms are employed to modify the Look-Up Table(LUT) for the fuzzy control rules and to decide how much fuzzy rules are to be modifid after evaluating the control performance, respectively. And the fuzzy controller is replaced by a PD controller in a prespecified region nearby the set point for good settling actions, where gain parameters are determined by fuzzy rules based on the magnitude of error velocity at the instant when the output penetrates into the prespecified region. To show the effectiveness of the proposed controller, extensive computer simulation results as well as experimental results are illustrated for an inverted pendulum system.

• 가정과삶의질연구
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• 제15권4호
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• pp.253-268
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• 1997

the purpose of this study was to analyze the relationship between elderly's leissure participation and the type of leisure attitude and leisure constraints. The sample of this study consisted of 485 elderly over 55 years old living in Seoul Daejeon Jeonju and Daegu. Statistics employed for the analysis were frequencies means cross-tabs and multiple regression analysis. The results could be summarized as follows The types of leisure attitude and leisure constraints of elderly was affected by the age educational attaintment health status region total asset income pocket money family relationship locus of control and self-esteem. And educational attaintment health status region family relationship locus of control and self-esteem had effects on leisure participation level of elderly. These findings pointed that psychological factors such as family relation self-esteen and type of leisure attitude and leisure constraints were the variables explaining leisure activities of elderly.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.101-106
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• 2009

We study on the segregation reduction effect of Self-Leveling Color Mortar by using variable composition set of plasticizer and thickener, Naphthalene, melamine and polycarbonate-based dispersants were employed as plasticizers for examining on fluidity of mortar mixtures. For enhancement of mortar stability without loss of it's fluidity, two types of thickener were used such as polysaccharide(PS) and hydroxyethylcellulose(HEC). As a result, the most effective mortar was composed by feeding 0.519% of polycarbonate-based dispersant with 0.002587% of PS and 0.155844% of HEC on amount of basic mortar.

• 대한가정학회지
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• 제38권12호
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• pp.111-129
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• 2000

The purpose of this study is to investigate the level of consumer instantly impulse buying in cuber market user. Also this study analyzes causal effect on consumer instantly impulse purchasing by demographic and social, place and promotion, consumer emotion state, and consumer internal and psychological variables. The data had been collected from on-line research method with 1,034, as using cuber market. The major statistical methods used for data analysis are frequency, percentile, mean, factor analysis, multiple regression analysis, Pearson's correlation analysis, and path analysis. The result of causal effect analysis were as follows; First, the variables affecting possession oriented materialism were sex and age. Second, the variables affecting self-control were sex, income, account of credit card, and instantly state of mind. Third, variables directly affecting instantly impulse purchasing were serif employed, banner advertisement, experience of cuber shopping, shopping mall pattern, instantly state of mind, purpose of shopping, happiness and success oriented materialism, and self-control. Also sex, income account of credit card, and instantly state of mind emerge to indirectly effect via self-control. Especially, the variables of success oriented materialism and instantly state of mind influenced on the highest of relative variables in consumer instantly impulse purchasing.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.2020-2021
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• 2007

Viologen derivative has been widely investigated because of their well-electrochemical behavior including the electron acceptor for the electric charge delivery mediation of the devices. The viologen exist in three main oxidation states, namely, $V^{2+}{\rightleftarrows}V^{{\cdot}+}{\rightleftarrows}V^0$. These redox reactions are highly reversible and can be cycled many times without significant side reaction. In this paper, we determined the time dependence to resonant frequency shift of QCM during self-assembly process and the electrochemical behavior of the self-assembled viologen monolayers by electrochemical QCM method. The redox reactions of viologen were highly reversible and the EQCM has been employed to monitor the electrochemically induced adsorption of SAMs during the redox reactions.

• 산업융합연구
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• 제6권1호
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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.

• 한국표면공학회지
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• 제34권6호
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• pp.531-536
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• 2001

Co-22 %Cr alloy films are promising for high-density perpendicular magnetic recording media with their perpendicular anisotropy and large coercivity of 3000 Oe. We observed that a self organized nano structure (SONS) of fine ferromagnetic Co-enriched phase and paramagnetic Cr-enriched phase appears inside the grain of Co-Cr magnetic alloy thin films at the elevated substrate temperature after do-sputtering. The periodic fine Co-enriched phase and Cr-enriched phase is the plate shape of 80 (equation omitted)-wide and 1000 (equation omitted)-long. Cr-enriched phases are located at the center of grains. We prepared 5000 (equation omitted) -thick Co-22 %Cr films on polyimide substrate with varying substrate temperature of $ 30^{\circ}C$, $ 150^{\circ}C$ ,200 $^{\circ}C$, $300^{\circ}C$, and $400^{\circ}C$, respectively. A transmission electron microscope equipped with energy dispersive X-ray analyzer is employed to observe the microstructure of each samples after Co-enri-ched phase are etched selectively. The self organized nano structure of Co-enriched and Cr-enriched lamellar is observed above the substrate temperture of $150^{\circ}C$. No compositional change is observed with substrate temperature. The compositional phase separation in self organized structure becomes clear as the substrate temperature increases. Our results implies that the self organized nano structure in Co-22 %Cr film is ideal for ultra high density recording media by recording selectively on Co-enri-ohed phase.

• 한국보건간호학회지
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• 제22권2호
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• pp.200-210
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• 2008

Purpose: To assess the effectiveness of an 8-session health education program to promote the health of married immigrant women. Methods: A quasi-experimental research design was employed. The subjects included 36 female marriage immigrant women (17 in the experimental group and 19 in the control group) who agreed to participate in this study. The intervention involved 8 sessions with a partnership strategy and was led by Public Health Nurses and the researcher. Our analysis included descriptive statistics, Fisher's exact test, t-test, and Pearson correlation coefficients. Results: The results revealed significant mean differences in terms of self-efficacy between the two groups. The mean of their self-efficacy was higher in the experimental group than in the control group, whereas there no mean differences were detected between the two groups in terms of health knowledge and self-esteem. Additionally, the knowledge of the immigrant women was correlated with their self-efficacy. Conclusion: The 8-session health education program was found to have an effect on self-efficacy, even with the limitations to methodological rigors posed by the subject-specific conditions. In the future, health education materials written in the native language of such women will need to be develop. Additionally, repeated studies will be required that involve randomized controlled trials characterized by better methodological strength and strategies to enhance participants’ interests and motives.

• 대한가정학회지
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• 제47권4호
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• pp.111-119
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• 2009

The purpose of this study was to examine the moderating effect of self esteem on the link between social support(e.g. from family, friends and significant others) and career decision-making level of youth in residential care. Data for this study were collected from 14 nationwide institutions between June 10th to June 20th, 2008. Selfreporting surveys were employed to gather information from 412 sources within these institutions. Collected data were analyzed by SPSS program(12.0). The results were as follows: Stepwise multiple regression showed that self-esteem could be used to predict career decision-making level($\beta$ = -.262, p < .001). Furthermore, self-esteem had a moderating effect on the relationship between social support and career decision-making level($\beta$ = -.749, p < .001). Specifically, self-esteem and the scale of social support from family, friedns or significant others had a moderating effect on career decision-making level($\beta$ = - .118, p < .001). The implication of these findings on career decision-making intervention of youth in residential care and future research priorities are discussed.