• The Mathematical Education
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• v.26 no.2
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• pp.55-61
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• 1988

이 논문에서는 CS-Semistratifiable 공간보다 더 일반화된 공간 Cn-Semistratifiable을 정의 하며 그에 따른 여러가지 성질들을 조사하였다. 위상 공간(X, $\tau$)에 대하여 $\alpha$$\times$$\tau$에서 X의 폐집합족으로의 함수 S가 존재하여 다음 조건들을 만족할 때 공간X는 Cn-Semistratifiable over $\alpha$라 정의한다. a) 임의의 개집합 U에 대하여 U=U{S($\beta$, U) : $\beta$<$\alpha$} b) U, V가 X의 개집합이고 U⊂CV이면 모든 $\beta$<$\alpha$에 대하여 S($\beta$, V)⊂S($\beta$, V)이다. c) 만약 ${\gamma}$<$\beta$<$\alpha$ 이라면 임의의 개집합 U에 대하여 S(${\gamma}$, U)⊂S($\beta$, U)이다. d) X의 수렴하는 net $X_{\beta}$$\longrightarrow$X와 X를 품는 임의의 개집합 U에 대하여 적당한 $\beta$<$\alpha$가 존재하여 X$\in$S($\beta$. U)이고 { $X_{\beta}$}는 S($\beta$, U)안에 eventual하게 들어간다. 위의 정의에 의하여 다음과 같은 성질들이 증명되었다. 1 . Strstifiable over $\alpha$$\longrightarrow$cn-semistratifiable over$\longrightarrow$semistratifiable over $\alpha$ 2, 어떤 공간이 cn-Semistratifiable over $\alpha$이기 위한 필요충분 조건은 그것이 linearly cushioned cn-pairnet를 갖는 것이다. 3. cn-semistratifiable over $\alpha$의 부분공간 역시 cn-semistratifiabie over $\alpha$ 하다. 4. on-semistratifiable over $\alpha$의 유한개의 적공간 역시 cn-semistratifiabie over $\alpha$한다. 5. 폐 cn-semistratifiable over $\alpha$ 부분공간들의 합공간 역시 on-semistrbtifiable over $\alpha$ 하다. 6. 폐연속 net-cevering 함수에 의하여 cn-semistratifiable over $\alpha$ 성질이 보존된다.

• International Journal of Industrial Entomology and Biomaterials
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• v.9 no.2
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• pp.273-277
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• 2004

Variation in the size of the silk filament will determine the uniformity and quality of the silk reeled. In the present study, an attempt has been made to study the filament size variation in 6 multivoltine parental breeds and 9 multivoltine ${\times}$ bivoltine hybrids in all three seasons of a year. All multivoltine breeds and multivoltine ${\times}$ bivoltine hybrids showed variation in filament size throughout its length from the outer layer to inner layer. Results of the present study indicated that the size of the filament decreased from outer to inner layer. The decrease in filament size was sudden in some breeds/hybrids whereas it was gradual in other. Relationship between filament length to that of slope, average filament size to slope, and maximum filament size to slope was determined based on regression analysis. Regression analysis revealed significant positive correlation between slope vs average filament length (r=0.92$^{**}$) in multivoltine${\times}$bivoltine hybrids. Among parental breeds, 96C showed lowest slope of the curve (b-value: -0.00428) and 96A showed highest slope of the curve (b-value: -0.00269). Among 9 hybrids, PM${\times}$N $B_4$ $D_2$ recorded lowest slope value (b-value: -0.00328) and BL24${\times}$N $B_4$ $D_2$ showed highest value for slope of the curve (b-value: -0.00234). The breed 96C, which showed lowest slope value can be utilized for future breeding programmes to breed strains with less size deviation. Three multivoltine${\times}$bivoltine hybrids viz., PM${\times}$N $B_4$ $D_2$, 96E${\times}$CSR19 and BL67${\times}$CS $R_{101}$ , which showed less slope values (b-values: -0.00328, -0.00300 and -0.00297 respectively) can be utilized for commercial exploitation to produce uniform silk.k.

• Korean journal of food and cookery science
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• v.28 no.4
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• pp.363-374
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• 2012

Quality characteristics of baechu (Kimchi cabbage) kimchi prepared using various kinds of domestic solar salts (KS5Y, KS2Y, KS1Y, KFS, and KSS) and imported solar salts (AS1Y and CS1Y) were compared with Korean processed salt (KRS) and Mexican rock salt (MR1Y) during 60 days of storage. Sodium contents of MR1Y, AS1Y, and domestic KRS with values of 363,653.40, 358,952.40, and 356,799.90 mg/dL, respectively, were significantly higher than that of KFS with a value of 280,249.80 mg/dL (p < 0.001). Thus, the kimchi using KFS was expected to have 22-23% lower sodium content compared to that of the other kimchis. KFS magnesium content was significantly highest at 4,464.10 mg/dL and calcium was significantly the highest in samples of KS1Y with a value of 711.31 mg/dL. Most of the pHs and acidities in the kimchi samples were in the optimum range due to the relatively low storage temperature of $2^{\circ}C$. The salt concentrations of all kimchis using domestic solar salt during storage was greatly reduced compared to those using the imported salts or KRS. Sensory saltiness of the KS1Y sample group was significantly the lowest value (6.08) at 0 days of storage (p < 0.001) and maintained relatively low saltiness during the entire storage period. The crispness of the KS2Y, KS1Y, and KSS sample groups were significantly higher (10.02, 9.77, and 9.49, respectively), compared to that of KRS (7.64) at 60 days of storage (p < 0.001). The KFS sample group had the higher acceptance values for pickled seafood aroma, sour aroma, saltiness, and overall acceptability compared to those in the other samples.

• Korean Journal of Dental Materials
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• v.44 no.1
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• pp.21-31
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• 2017

The purpose of this study was to fabricate a biocompatible fluoride varnish with sustained fluoride release, and to compare it with commercial fluoride varnishes. For the experimental fluoride varnish, bis-GMA (BG) or two types of rosin (KR-610: K0, KR-612: K2) were used as bases. Either ethyl acetate or ethanol was added as solvent and 5 wt% NaF was used. 5 mg of experimental F- varnishes and 2 commercial products, Cavity shield (CS) and Flor-opal (FO), were applied on a labial surface of bovine teeth ($10mm{\times}7mm$). The amount of fluoride release was measured at 1 hr, 2 hrs, 3 hrs, 4 hrs, 8 hrs, 12 hrs, 1 day, 3 days, 5 days, 10 days, 15 days, 20 days and 30 days. MTT test was done with diluted F- varnishes using ethanol. Statistical analysis was done with one-way ANOVA and Duncan multiple range test (${\alpha}=0.05$). BG showed the highest fluoride release at 1 hr (P<0.05), while that of K0 was highest at 2 hrs (P<0.05). From 1 day to 5 days, experimental fluoride varnishes showed higher fluoride release than the commercial products (P<0.05), and there were no significant differences after 5 days (P>0.05). For MTT test, K0 and FO showed higher cell viability than other experimental groups (P<0.05), with no significant differences with K2 (P>0.05). Considering the sustained fluoride release and cell viability of the experimental rosin-based fluoride varnishes compared with commercial products, it will be appropriate for clinical application.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.212-217
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• 2019

This study is a convergence study attempted to understand the learning effects of oral health education class applying action learning on the communication ability and problem-solving ability in dental hygiene students. The subjects of this study were 37 students in the third year of dental hygiene department. As a result, the learning effects of oral health education class applying action learning on the communication ability(p<0.001) and problem-solving ability(p<0.001) showed positive changes in the pre and post comparison. The changes in the scores of sub-dimensions of the communication ability and problem-solving ability were also significant in the pre and post comparison. As the class applying action learning is effective in improving the learner's communication ability and problem-solving ability, it should be utilized as the leaner participation-oriented teaching method for design and operation of dental hygiene education.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.149-158
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• 2019

The purpose of this study is to investigate the effects of ego-resilience on life satisfaction and the mediating effects of school adjustment between them among first graders, and to provide basic data for improving children's life satisfaction. For this purpose, the investigator collected data from 601 first graders at 25 elementary schools in the Jeonju area and analyzed them with the SPSS 22.0 and AMOS 22.0 statistical programs. The findings were as follows: first, there were significant correlations among the three factors of children's life satisfaction, ego-resilience, and school adjustment; and secondly, both of their ego-resilience and school adjustment had impacts on their life satisfaction, and their ego-resilience had influences on their life satisfaction via school adjustment. These findings indicate that there is a need for supports at various levels to increase the school adjustment abilities of first graders as well as their ego-resilience in order to improve their life satisfaction.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.218-226
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• 2019

The purpose of this study is to analyze the level and influence factors of social safety perception of middle-aged and older adults with disabilities. The subjects of the survey were older than 50 with disabilities who responded to the 2018 Social Survey. The results analyzed by Hierarchical regression analyzes showed that factors such as gender, age, place of residence, education level, subjective health status, risk response level, compliance level of others, and compliance with public order had a significant effect on the social safety perception level. Through this study, we could know the importance of personal requirements and social capital for social safety perception of middle-aged and older people with disabilities. In the future, the differences in safety perception by type of disability should be studied too.

• Journal of Convergence for Information Technology
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• v.9 no.11
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• pp.47-54
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• 2019

This study is a descriptive research study to investigate the effect of core basic nursing practice education on clinical competence of nursing students. The data was collected from 169 3rd and 4th grade students in the Department of Nursing, College of Nursing, G province. The data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, multiple regression. Core experience is negatively correlated with performance confidence (r=.446, p<.001) was negatively correlated with clinical performance (r=-.206, p=.001). It was found to have a negative correlation with (r=-.346, p<.001). In this study, the factors affecting clinical performance were self-confidence (${\beta}=-.317$, p<.001), and clinical performance was 11.3%. Therefore, effective practical education program for improving clinical performance is needed for smooth practical education of nursing students.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.101-107
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• 2019

This paper proposes a method for detecting faults in conveyor systems used for transportation of raw materials needed in the thermal power plant and cement industries. A small drone was designed in consideration of the difficulty in accessing the industrial site and the need to use it in wide industrial site. In order to apply the system to the embedded microprocessor, hardware and algorithms considering limited memory and execution time have been proposed. At this time, the failure determination method measures the peak frequency through the measurement, detects the continuity of the high frequency, and performs the failure diagnosis with the high frequency components of noise. The proposed system consists of experimental environment based on the data obtained from the actual thermal power plant, and it is confirmed that the proposed system is useful by conducting virtual environment experiments with the drone designed system. In the future, further research is needed to improve the drone's flight stability and to improve discrimination performance by using more intelligent methods of fault frequency.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.244-253
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• 2019

This study was a descriptive study to investigate the effects of healthcare workers' consciousness of biomedical ethics, recognition of good death, and self-esteem on attitude toward advance directive. Participants in this study were 292 healthcare workers in the three general hospitals located Y city. The data were collected from April 2 to April 23, 2019 and analyzed descriptive statistics, t-test, one-way ANOVA, Pearson correlation coefficient, and multiple regression using the SPSS Win. 22.0 program. The result of the multiple regression indicates the intention to awareness regarding advance directives, intention to execute advance directives, time to complete advance directives and recognition of good death predict 23.5% (F=12.39, P=.000) of attitudes toward advance directives. Therefore, it is necessary to develop a program to establish attitudes toward advance directives by providing education on recognition of good death of healthcare workers.