• Proceedings of the Materials Research Society of Korea Conference
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• 2003.03a
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• pp.19-19
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• 2003

The injection of spins into nonmagnetic semiconductors has recently attracted great interest due to the potential to create new classes of spin-dependent electronic devices. A recent strategy to achieve control over the spin degree of freedom is based on dilute ferromagnetic semiconductors. Ferromagnetism has been reported in various semiconductor groups including II-Ⅵ, III-V, IV and II-IV,-V$_2$, which will be reviewed. On the other hand, to date the low solubility of magnetic ions in non-magnetic semiconductor hosts and/or low Curie temperature have limited the opportunities. Therefore the search for other promising ferromagnetic semiconducting materials, with high magnetic moments and high Curie temperatures (Tc), is of the utmost importance. In this talk, we also introduce new pure ferromagnetic semiconductors, MnGeP$_2$ and MnGeAs$_2$, exhibiting ferromagnetism and a magnetic moment per Mn at 5K larger than 2.40 ${\mu}$B. The calculated electronic structures using the FLAPW method show an indirect energy gap of 0.24 and 0.06 eV, respectively. We have observed spin injection in MnGeP$_2$ and MnGeAs$_2$ magnetic tunnel junctions through semiconducting barriers.

• The Journal of Korean Academy of Prosthodontics
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• v.59 no.2
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• pp.164-172
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• 2021

Purpose: The purpose of this study was to analyze the level of interest that common Internet users have in dental implant using a Google Trends, and to compare the level of interest with big data from National Health Insurance Service. Materials and methods: Google Trends provides a relative search volume for search keywords, which is the average data that visualizes the frequency of searches for those keywords over a specific period of time. Implant was selected as the search keyword to evaluate changes in time flows of general Internet users' interest from 2015 to 2019 with trend line and 6 month moving average. Relative search volume for implant was analyzed with the number of patients who received National Health Insurance coverage for implant. Interest in implant and conventional denture was compared and popular related search keywords were analyzed. Results: Relative search volume for implant has increased gradually and showed a significant positive correlation with the total number of patients (P<.01). Interest in implant was higher than denture for most of the time. Keywords related to implant cost were most frequently observed in all years and related search on implant procedure was increasing. Conclusion: Within the limitations of this study, the public interest in dental implant was gradually increasing and specific areas of interest were changing. Web-based Google Trends data was also compared with traditional data and significant correlation was confirmed.

• Journal of Korean society of Dental Hygiene
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• v.22 no.5
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• pp.323-332
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• 2022

Objectives: This study aims to confirm the educational necessity and utilization of VR media. And it was conducted to prepare basic data necessary for the use of VR in various dental hygiene education in the future and the development of innovative practical training courses. Methods: Before and after using VR in oral radiology practice classes, learning interest (4 items), learning commitment (9 items), learning motivation (5 items), educational media preference (4 items), and satisfaction (10 items) were investigated and analyzed. Friedman two way ANOVA by ran a nonparametric analysis corresponding to repeated measures ANOVA was performed. The statistical significance level was 0.05. Results: It was found that there were statistically significant differences in learning interest, learning immersion, and learning motivation according to the type of oral radiology practice education medium (p<0.05). Conclusions: VR is expected that the use of learning media using VR will lead to students' interest, immersion, and learning motivation in class, and that positive learning effects on VR education media can be sufficiently obtained.

• Korean journal of food and cookery science
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• v.23 no.2 s.98
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• pp.205-220
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• 2007

This study was conducted to examine the perceptions of residents in the Chungcheong area on the commercialization of traditional Korean foods as convenience foods. Data was gathered using a questionnaire designed to evaluate the concerns, satisfaction, and Knowledge of traditional Korean food as well as the perceptions on commercialization of Korean traditional foods as convenience foods. In order to measure traditional food recognition and interests related to health, a 5-point Likert scale was employed and 374 subjects were surveyed. The results are summarized as follows : Most of the respondents expressed concerns for traditional Korean foods. In the over 50 age group, degree of interest (p<0.01), knowledge (p<0.01), and satisfaction (p<0.01) with regards to traditional foods was higher than in other age groups. The professional group had higher degrees of interest, knowledge, and satisfaction about traditional foods than the general group. Based on monthly income, for respondents earning over 3,010,000 won/month, the knowledge rating for traditional foods was higher than in the under 3,000,000 won/month group. The professional group had a more positive view of the commercialization of traditional food as convenience food than the general group. Respondents deemed quality improvements and an increase in consumption as reasons for the commercialization of traditional foods. Those with a greater recognition of traditional foods also had a higher degree of interest for the foods. Efforts for the commercialization of traditional Korean foods will help with consumer menu choices menu development and systems management of Korean traditional foods.

• Journal of Korean Academic Society of Home Health Care Nursing
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• v.13 no.1
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• pp.16-23
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• 2006

Purpose: The purpose of this study was to examine morale and related factors of hospital based home care nurses. Method : The subjects were 159 home care nurses from 94 hospitals and clinics which were operating home care programs around the country. Data were collected for 40days from March 14, to April 24, 2005. The questionnaire consisted of 51 items including 12 general variables and 39 items of nurses' morale. The reliability of the questionnaire by Cronbach's ${\alpha}$, was .88. Result : The level of the morale was found as mean score 2.69 in 4 point scale The high ranks of morale were self actualization($3.05{\pm}0.43$) and job satisfaction($3.03{\pm}0.43$), the factors which showed lower points were evaluation of work ($2.47{\pm}0.53$), welfare($2.42{\pm}0.42$), promotion system ($2.35{\pm}0.45$) and wages($2.23{\pm}0.54$). The level of morale according to the general variables were significantly different in such variables ; home care nursing antecedent(p = .000), motivation for job selection(p= .030), intention to quit the job(P= .000). Variables of intention to quit the job(15.7%) and home care nursing antecedent; 6.7%(p=.001) showed 22.4% of explanatory persuasion effect on level of morale. Conclusion : To improve a morale of home care nurses, the arrangement of nursing department should be consider nurse's aptitude and interest and allow them to have longer period of work in that part. Also wages, promotion system and welfare should be reformed as relevant as their career.

• Journal of Korean Public Health Nursing
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• v.19 no.1
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• pp.95-107
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• 2005

With the aim of diagnostic research on health education. the health promoting behaviors related to elementary school students' weight control. life satisfaction. health state. self-efficacy. parent's interest and knowledge about weight control and school health education of weight control were investigated on the basis of the PRECEDE model. The data for this study were collected from a sample at an elementary school in Chongju for 5 days in July. 2004. In analyzing the data. t-test. one-way ANOVA. chi-square test and multiple regression analysis were done by using SPSS 10.1 The results were as follows : 1. The elementary school students' level of life satisfaction was above half of the full point. The score difference of life satisfaction was statistically significant by grade and academic achievement(F=4.646. p=.010. F=16.042. p=.000). 2. The perceived level of health state was moderate for all students. Normal weight students' level was significantly higher than obese students' (t=3.667. p=.000). 3. The perceived level of health promoting behaviors related to weight control was above the moderate. The perceived level of health promoting behaviors related to weight control in the obese students was significantly higher than that in normal weight students(t=-2.225. p=.027). The students used computer for 1.48 hours and watched TV for 2.52 hours a day. 4. The score of health promoting behavior self-efficacy in this subject was 70.61. 5. The parents' level of interest in the obese students' weight control was significantly higher than that in the normal weight students(t=-4.86. p=.000). 6. Sixty-six percent of the students learned about weight control education in school. 7. The health promoting behavior self-efficacy among the educational diagnostic variables was the most influential variable in students' health promoting behaviors related to weight control. This research diagnosed the needs of weight control education in elementary school by assessing various factors related to weight control behaviors. The research findings suggest that we can enhance the prevention of childhood obesity by strengthening the related factors such as parents' knowledge and interest, health promoting behaviors and self-efficacy related to weight control in school health education.

• The Journal of the Korea Contents Association
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• v.13 no.1
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• pp.300-310
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• 2013

Under the goal of examining the subjective awareness characteristics of oral health and identifying major factors influencing the oral health knowledge and practice behavior of oral health, this study collected and analyzed questionnaires from 763 adults in certain areas from June 23, 2011 to March 24, 2012 and obtained the following conclusions: 1. As for oral health knowledge according to general characteristics, there was statistical significance(p<0.001) according to gender, educational background, and vocation. 2. As for the practice behavior of oral health according to general characteristics, there was statistical significant(p<0.001) according to gender, age, educational background, vocation, and income. 3. As for the Oral health knowledge and the practice behavior of oral health according to awareness characteristics of oral health, there was statistical significant(p<0.001) according to the importance of oral health, subjective health state and interest in oral health(p<0.001). 4. According to the regression analysis results of the factors related to oral health knowledge and practice behavior of oral health, there was statistical significance(p<0.001) in interest in oral health and had connection. Based on those findings, it is imperative to fully consider the general characteristics and subjective awareness characteristics of oral health of individuals when developing an educational program for oral health and investigating and conducting educational methods for oral health in order to improve the practice of oral health for practically better oral health of the nation.

• Proceedings of the Optical Society of Korea Conference
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• 2000.08a
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• pp.28-29
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• 2000

Optical power splitters and/or couplers are important components for optical signal distribution between channels both in wavelength division multiplexing(WDM) systems and photonic integrated circuits(PICs). Since polarization is usually not known after propagation in an optical fiber, passive WDM components have to be polarization insensitivity, Compared to alternatives such as directional couplers or Y-junction splitters, splitters based on multimode interference(MMI) have found a growing interest in recent yens because of their desirable characteristics, such as compact size, low excess loss, wide bandwidth, polarization independence, and relaxed fabrication tolerances$^{(1)}$ . These devices have been fabricated in polymers, silica, or III-V semiconductor materials. A1 $\times$ 4 MMI power splitter on InP materials that were suitable for application in the 1.55-${\mu}{\textrm}{m}$ region$^{(2)}$ . However, the fabrication process of the structure is too complicated and the photolithography tolerance is very tight. Also, a 1 $\times$ 16 InGaAsP/InP MMI power splitter with an excess loss of 2.2dB and a splitting ratio of 1.5dB was demonstrated by using deep etching$^{(3)}$ . The deep etching of the sidewalls through the entire guide layer of the slab waveguide resulted in a number of drawbacks$^{(4)}$ . (omitted)

• Journal of the Korean Applied Science and Technology
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• v.38 no.2
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• pp.521-531
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• 2021

This study was conducted to examine the relationships between nursing students' knowledge on dementia, care performance, and empathy, thus providing the foundation of dementia patient nursing intervention strategies for nursing students. For the analysis to examine the relationships, this study used descriptive statistics, t-test, ANOVA, Scheffé test, and Pearson's correlation coefficient. The analysis showed that the higher students' year of study and the higher their interest in dementia (F=5.02, p=.008), the higher their knowledge on dementia (t=-4.03, p<.001), and also that the higher their satisfaction with clinical training (F=3.91, p=.023), the higher their care performance. It was found that nursing students' knowledge on dementia and their care performance (r=.21, p=.023) were positively correlated at a statistically significant level. Based on the results, this study suggests the need to develop and utilize education programs that can help students gain knowledge on dementia prior to clinical training so that they can have more knowledge on dementia and be encouraged to practice caring for patients with dementia.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.4
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• pp.710-717
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• 2016

This study was progessed from March 3, 2015 to March 31 for purpose of evaluating the effects of the trauma-patient practice education using simulation on knowledge, satisfaction and problem-solving in paramedic students. To closely examine the adequacy of education for paramedic students in one university, a comparison was made by dividing 28 male and female students into two groups of experimental group with 14 students and control group with 14 students. The experimental group was carried out the practice education of the trauma-patient simulation using simulator. The control group was conducted the theoretical and practical education through a traditional instructor-led class. As a result of the research, the experimental group can be known to be significantly higher(t=2.09, p<.05) than the control group in the post-knowledge survey and satisfaction following the development in each educational method for 4 weeks. Also, in consequence of the variable-based correlation in the sub-factors of satisfaction, a correlation was shown between interest and clinical help or between interest and problem-solving ability(p<.05, p<.01). Based on the results of this study, it is considered that the simulation practice education in the emergency department is demanded and that the practice education will need to be continuously applied through developing a proper scenario.