• Proceedings of the KIPE Conference
• /
• 2003.11a
• /
• pp.214-217
• /
• 2003

The connectorless power supply system on that multi-contact causes confidence when the wiring reconstructed in the rear. As you see above, contact points between sets and indoor space cause inferior function of audio frequency so it needs to be eliminated. This paper explains the structure of connectorless power supply to supply the system with power crossing the air gap in the part of inductively in the connectorless power supply of both magnetic and electrical model. To get maximum output of electrical load, compensating capacitor compensates to show inter-inductance, lequeage-inductance reducing the track-inductance and access the conditions for resonance. At that time it accesses the maximum electric power. The small change of the value of compensating capacitor causes the changes of maximum electric power. Here the power electronics technology is used not only in the industrial machinery but also in the home appliances so the switching power supply is used to actualize the miniaturization, lightweight, and high efficiency. Generally the condenser input methods are widely used in the rectification circuit of switching power supply, but condenser input method generate great quantity of high frequency components because with this method the current flows in the power input filtering condenser only around value of peak of ac input voltage. To solve these problems, installation of power factor improve circuit on the front of filtering capacitence was considered. Several methods were suggested regarding, but the active filter method which makes smalliging and highly power factor possible are the produce main stream. IC for power factor improvement can be utilized by CMOS process proposing low power consumption. When the high power factor is considered seriously in the power factor improvement circuit, active filter method is selected. In the active filter method, the boost converter is used. Regarding this ·the boost converter is needed.

• Women's Health Nursing
• /
• v.26 no.4
• /
• pp.326-335
• /
• 2020

Purpose: This study was conducted to evaluate the construct validity, reliability, measurement invariance, and latent mean differences in the Breastfeeding Adaptation Scale-Short Form (BFAS-SF) for use with mothers at 2 weeks postpartum. Methods: This methodological study was designed to evaluate the validity, reliability, and measurement invariance of the BFAS-SF at 2 weeks postpartum, with data collected from 431 breastfeeding mothers. Confirmatory factor analysis and multi-group confirmatory factor analysis were conducted to assess the factor structure and the measurement invariance across employment status, delivery mode, parity, and previous breastfeeding experience, and the latent mean differences were then examined. Results: The goodness of fit of the six-factor model at 2 weeks postpartum was acceptable. Multi-group confirmatory factor analysis supported strict invariance of the BFAS-SF across employment status and delivery mode. Full configural invariance, full metric invariance, and partial scalar invariance across parity and full configural invariance and full metric invariance across previous breastfeeding experience were supported, respectively. The results for latent mean differences suggested that mothers who were employed showed significantly higher scores for breastfeeding confidence. Mothers who had a vaginal delivery showed significantly higher scores for sufficient breast milk and baby's feeding capability. Multiparous mothers showed significantly higher scores for baby's feeding capability and baby's satisfaction with breastfeeding. Conclusion: The validity and reliability of the BFAS-SF at 2 weeks postpartum are acceptable. It can be used to compare mean scores of breastfeeding adaptation according to employment status, delivery mode, and parity.

• Women's Health Nursing
• /
• v.6 no.3
• /
• pp.358-371
• /
• 2000

The purpose of this study was to provide the basic, data for developing a program for effective prevention for Postpartum Depression (PPD) by investigating the level of PPD in postpartum 2 weeks women. The subjects were 384 women who visited obstetrical clinics for postnatal care. The data were collected from June 29. 1999 to April. 2000, using a 46-item questionnaire related to PPD, and analyzed by SAS program for t-test, ANOVA, Scheffe test, stepwise multiple regressions. The results were as follows : 1. The level of PPD according to general characteristics Women had mild PPD (Min score; 46.0, Max score; 124.0). The PPD levels were significantly differences according to religion and marital satisfaction (p<0.05). 2. The level of PPD according to obstetrical characteristics 1) Characteristics related to pregnancy The PPD levels were significantly differences according to mood change, confidence of body weight recovery, depression related to appearance change, husband's help to housework, and husband's emotional support (p<0.05). 2) Stressful events during pregnancy The PPD levels were significantly differences according to financial problem, conflict between partners, conflict between family, and husband's job change (p<0.05). 3) Characteristics related to delivery and post natal period The PPD levels were significantly differences according to baby's health state, parenting confidence, and difficulties related to postpartum care (p<0.05). 3. The variables to predict postpartum depression in postpartum women are depression related to appearance change (10.4%), parenting confidence (8.8%), husband's help to housework (2.7%), confidence of body weight recovery (2.4%), husband's job change (1.9%), baby's health state (1.9%), difficulties related to postpartum care (1.6%), mood change (1.2%), conflict between partners (0.6%), marital satisfaction (0.5%), financial problem (0.4%). The sum total of all the above variables can account for 32.4% of postpartum depression. 4. The level of PPD according to PPD factors. Women had the highest degree of PPD in biophysiological phenomena-disturbance of physical functioning factor. The factors of relationship to baby-negative feeling and cognitive phenomena-self concept disturbance were showed the lowest degree of PPD. As a result of the above findings, a systemic and individualized program is strongly recommended for PPD prevention, diagnosis, and care for PPD in postpartum women. In near future, this study should be expanded to investigate the coping skills according to the PPD levels in postpartum women.

• Journal of Industrial Convergence
• /
• v.18 no.4
• /
• pp.77-86
• /
• 2020

This study is a descriptive research study to grasp the critical thinking tendency, clinical practice stress, core basic nursing confidence, and degree of adaptation to clinical practice in nursing students. From June to July 2019, 207 students in the fourth year of nursing college were surveyed through their own questionnaire. Collected data were analyzed by t-test, ANOVA and multiple regression analysis using SPSS/WIN v24.0. The negative correlation between clinical practice stress and critical thinking tendency(r=-.18, p=.010). The core self-confidence practice self-confidence showed a positive correlation with critical thinking tendency(r=.25, p<.001), and a negative correlation with clinical practice stress(r=-.17, p=.017). Adaptation to clinical practice showed a positive correlation with clinical practice stress(r=.44, p<.001), and the factor influencing clinical practice adaptation was stress(β=.40) (F=18.34, p<.001), and the explanatory power was about 23.1%. As mentioned above, stress brings a positive change to clinical practice, so it is necessary to identify stress factors received from clinical practice of nursing college students and reflect them in curriculum development.

• Journal of the Korea Convergence Society
• /
• v.9 no.8
• /
• pp.311-318
• /
• 2018

The purpose of this study was to investigate the correlation between basic self - confidence and CPR - related factors and to investigate factors affecting CPR intention in nursing college students. Data were collected between January to March, 2018. Using SPSS(ver, 24.0), independent t-test, Pearson's correlation and logistic regression were used for the statistical analysis. Among the variables related to cardiopulmonary resuscitation, there was a high correlation (r = .575~.738). In the case of AED use, there was a low correlation with self-confidence of core nursing skills, CPR confidence, proficiency, and self-efficacy (r = .163~.301). A moderate correlation (r = .415~453) was found between the variables related to core nursing skills and CPR related variabls. Logistic regression analysis showed that CPR Self-efficacy (OR=1.22, 95% CI: 1.07~1.38), and AED application Competency (OR=1.72, 95% CI: 1.09~2.75) are effect factors. Since there is a correlation with AED, which is the main tool in CPR, it is necessary to include not only the self - efficacy but also the use of AED which is closely related to CPR in the actual situation as an essential element of education.

• Journal of KIISE:Software and Applications
• /
• v.35 no.10
• /
• pp.608-615
• /
• 2008

In Knowledge Q&A services where information is created by unspecified users, document quality is an important factor of user satisfaction with search results. Previous work on quality prediction of Knowledge Q&A documents evaluate the quality of documents by using non-textual information, such as click counts and recommendation counts, and focus on enhancing retrieval performance by incorporating the quality measure into retrieval model. Although the non-textual information used in previous work was proven to be useful by experiments, data sparseness problem may occur when predicting the quality of newly created documents with such information. To solve data sparseness problem of non-textual features, this paper proposes new features for document quality prediction, namely text-confidence features, which indicate how trustworthy the content of a document is. The proposed features, extracted directly from the document content, are stable against data sparseness problem, compared to non-textual features that indirectly require participation of service users in order to be collected. Experiments conducted on real world Knowledge Q&A documents suggests that text-confidence features show performance comparable to the non-textual features. We believe the proposed features can be utilized as effective features for document quality prediction and improve the performance of Knowledge Q&A services in the future.

• Korean Security Journal
• /
• no.61
• /
• pp.353-376
• /
• 2019

The study aims to analyze the factors affecting citizens' willingness to cooperate in police activities and to verify the intermediation effects of citizens' trust in police in these relationships. In order to achieve the purpose of such research, we selected factors that are expected to affect cooperation in police activities and police confidence by conducting a survey of 502 adult men and women living in Seoul and utilized them for analysis. The results from the analysis are summarized as follows. First, procedural fairness was confirmed as an influence factor on the cooperative history of police activities. In other words, it is necessary to have police activities conducted more fairly and citizens recognize them in order to induce cooperation from citizens, as the fairer police activities are shown to increase the willingness of citizens to cooperate. Second, it was confirmed that the level of citizen awareness of patrol activities and level of disorder in the community affected cooperation in police activities through the medium of police trust. It can be said that the more positively citizens evaluate police patrol activities, the more police confidence increases and this trust leads to citizens' cooperation in police activities. In addition, as the disorderly environment in the community improves, citizens' trust in the police increases, leading to civic cooperation in police activities. Based on this, the police trust was able to confirm that it had a fully operational effect. Third, if the procedural fairness of police activities increases, citizens trust the police, and this police trust leads to cooperation in police activities. In addition, it was found that procedural fairness had a direct impact on citizens' cooperation in police activities, so it was able to confirm that there was a partial selling effect.

• Journal of Korean Home Economics Education Association
• /
• v.35 no.4
• /
• pp.99-115
• /
• 2023

This study aimed to investigate the impact of college students' fashion competence on social anxiety, focusing on the mediating effects of interpersonal skills and appearance anxiety. To this end, a survey was conducted among 235 college students via online communities, and the data were analyzed using SPSS 26.0. The factor analysis revealed sub-factors of fashion competence, including fashion involvement, fashion innovativeness, and confidence in fashion coordination. The regression analysis of the mediation model showed that while fashion involvement indirectly reduces social anxiety through interpersonal skills, there was no mediating effect of appearance anxiety. Fashion innovativeness had an indirect impact on social anxiety through appearance anxiety, but there was no mediating effect through interpersonal skills. Confidence in fashion coordination influenced social anxiety indirectly through both interpersonal skills and appearance anxiety, and it also had a significant direct effect. This research confirmed that fashion competence can have a dual impact on social anxiety, and suggested that enhancing confidence in fashion coordination through fashion therapy programs might be beneficial for resolving college students' social anxiety. However, such programs should avoid excessively pursuing fashion innovativeness, as it can increase appearance anxiety, and should focus on enhancing confidence in one's appearance.

• Journal of Korean Home Economics Education Association
• /
• v.27 no.4
• /
• pp.141-154
• /
• 2015

The world has been demanding a green growing world in order to solve serious environmental pollution and resource depletion. This study aims to identify life style factors that drive eco-friendly clothing practices and efficacy in middle school students. Data was collected from 215 middle school students in Daegu, using a self-administered questionnaire in December 2013. Statistical analyses to determine frequency, average, ANOVA, factor analysis, reliability analysis, and regression analysis were performed using SPSS 21 program. The results of factor analysis indicated that eco-friendly clothing practices were classified into purchasing and management, reuse, washing, and recycle, and eco-friendly clothing practices efficacy was sub-grouped into practice confidence, purchasing and management efficacy, and washing and sharing efficacy, and life style consisted of fashion pursuit, environment pursuit, planned purchasing, and economy. Eco-friendly clothing practices and efficacy were significant differences in sex and grade (p<0.05). Eco-friendly clothing practices were significantly affected by the factors of environment pursuit, planned purchasing, economy of life style, and the factors of practice confidence, purchasing and management efficacy, and washing and sharing efficacy of eco-friendly clothing practices efficacy (p<0.05). The planned purchasing factor of life style significantly affected all the factors of eco-friendly clothing practices efficacy. This study suggests that eco-friendly clothing practices education program could account for the life style factors such as fashion pursuit, environment pursuit, planned purchasing, and economy with gender and grade to be effective for middle school students.

• Journal of Korean Neurosurgical Society
• /
• v.59 no.5
• /
• pp.492-497
• /
• 2016

Objective : Decompressive craniectomy is an effective therapy to relieve high intracranial pressure after acute brain damage. However, the optimal timing for cranioplasty after decompression is still controversial. Many authors reported that early cranioplasty may contribute to improve the cerebral blood flow and brain metabolism. However, despite all the advantages, there always remains a concern that early cranioplasty may increase the chance of infection. The purpose of this retrospective study is to investigate whether the early cranioplasty increase the infection rate. We also evaluated the risk factors of infection following cranioplasty. Methods : We retrospectively examined the results of 131 patients who underwent cranioplasty in our institution between January 2008 and June 2015. We divided them into early (${\leq}90days$) and late (>90 days after craniectomy) groups. We examined the risk factors of infection after cranioplasty. We analyzed the infection rate between two groups. Results : There were more male patients (62%) than female (38%). The mean age was 49 years. Infection occurred in 17 patients (13%) after cranioplasty. The infection rate of early cranioplasty was lower than that of late cranioplasty (7% vs. 20%; p=0.02). Early cranioplasty, non-metal allograft materials, re-operation before cranioplasty and younger age were the significant factors in the infection rate after cranioplasty (p<0.05). Especially allograft was a significant risk factor of infection (odds ratio, 12.4; 95% confidence interval, 3.24-47.33; p<0.01). Younger age was also a significant risk factor of infection after cranioplasty by multivariable analysis (odds ratio, 0.96; 95% confidence interval, 0.96-0.99; p=0.02). Conclusion : Early cranioplasty did not increase the infection rate in this study. The use of non-metal allograft materials influenced a more important role in infection in cranioplasty. Actually, timing itself was not a significant risk factor in multivariate analysis. So the early cranioplasty may bring better outcomes in cognitive functions or wound without raising the infection rate.