• Journal of Korean society of Dental Hygiene
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• v.4 no.2
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• pp.193-207
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• 2004

The aims of the study are as following : First, define and clarify the role and function of the dental hygienist. Second, based on thai definition, present an improved dental hygienist curriculum, improving their special competence. This study seeks to present a way for promoting role of dental hygienists as independent specialists, rather than as auxiliaries, contributing to better dental service in the process. The research was pursued by surveying by questionnaire those directly related to dental hygiene. They are 58 professors of dental hygiene, 164 dentists, 253 dental hygienists and 496 dental hygiene students, selected by the method of simple random sampling. Due to the small size of the sample, professors' group was analysed only through frequency and probabilities. For groups with larger samples(dentists, dental hygienists, dental hygiene students), methods of chi square(${\chi}^2$) tests, frequency analysis and one-way ANOVA were used in their analysis. Conclusions of the study are as following : First, role and function of the dental hygienist was defined and clarified. According to the analysis of the survey, main role of the dental hygienists as perceived by 62.9% of dentists was supporting treatments and managing patients and facility. This perception by dentists differs significantly to perception of other groups, which saw main role of dental hygienists as preventive dental treatment and dental hygiene education. Also, only 20.2% of dental hygienists perceived patients and facility management as their main role. This divergence of perception between groups weakens speciality competence of dental hygienists. To strengthen dental hygienists' speciality competence, preventive dental treatment and dental hygiene education must be defined as main role of dental hygienists. Furthermore, role of dental hygienists can be categorized into cooperative and auxiliary role. Second, in order to strengthen speciality competence of dental hygienists, their education must be augmented with curriculum emphasizing cooperative role. Specifically, courses on preventive dental treatment, dental hygiene education and dental X-ray photography must become compulsory, as well as becoming more comprehensive and organized. Also, training in schools and hospitals must be focused on those subjects. In addition, courses concerning auxiliary role must be incorporated into optional courses and more pedagogical courses are needed to widen students' career choices. Third, practical relevance of national dental hygienist certification examination must be heightened. In the survey, all groups gave negative response to questions concerning practical relevance of national dental hygienist certification test. Specifically, contents of the tests must be changed to test participants' competence in the cooperative area. Also, the test itself must be strengthened by adding practical examination to the certification scheme, as well as having more difficult examinations.

• Journal of Dairy Science and Biotechnology
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• v.35 no.3
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• pp.202-207
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• 2017

The objective of this study was to analyze the effects of homogenization, storage temperature, and storage period on the creaming of milk fat and changes in fat contents in the upper and lower layers and to predict the conditions for optimal homogenization efficiency using response surface methodology (RSM). The homogenization pressure, storage temperature, and storage period were set as independent variables of RSM, and the dependent variables were creaming, US Public Health Service (USPHS) code, and volume weighted mean diameter ($D_{4,3}$) in the upper and lower layers. Based on the results of RSM and regression analysis, the correlation coefficient ($R^2$) between experimental data and predicted values by RSM for homogenized milk was estimated to be more than 0.8. The RSM analysis indicated that optimal homogenization pressures of 14 MPa or more and 17 MPa or more were required to maintain the creaming layer of 3 mm or less during the storage for 15 days at $10^{\circ}C$ and $20^{\circ}C$, respectively. To keep the USPHS code at less than 10% for 15 days at $10^{\circ}C$ and $20^{\circ}C$, milk should be homogenized with a pressure of 16.8 MPa or more and 17 MPa or more, respectively.

• Communications of Mathematical Education
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• v.29 no.3
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• pp.373-389
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• 2015

This study was to investigate the practice of the teachers who changed their teaching subject to Mathematics from other subjects. Teacher, A who had traditional belief and Teacher, B, non-traditional belief were chosen for the study through the questionnaire in Sep. 2014. The result indicated that Teacher, A in traditional belief showed teacher-centered teaching but Teacher, B in nontraditional belief showed inconsistent way of teaching in comparison to the original perspective. The later said she could not teach students as she wanted to teach because of the lack of knowledge of teaching as a math teacher. The difficulties Teacher, A encountered were: to handle too many works beyond teaching and to teach too many contents to cover without having enough time to prepare. Teacher, B didn't know how to teach students math in a constructivism way. They asked to offer them more in-service training program to develop their expertise for teaching mathematics.

• Information Systems Review
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• v.7 no.2
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• pp.41-59
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• 2005

Mobile games have emerged as the most innovative entertainment technology adding new revenue streams, taking advantage of the potential of wireless consumer applications and service offerings. Mobile games, like any other types of computer game, offer a unique value for users in providing an exciting digital experience in virtual worlds. Players can become empowered through the development of new characters and strategies within games to achieve rewarding successes against the computers and other players. In this paper, we attempt to investigate the factors influencing the usage and acceptance of the mobile games in Korea, based on the extended version of the Technology Acceptance Model(TAM). Based on data collected from survey, we show that perceived usefulness is the major determinant for users to play mobile games. Two factors, including perceived enjoyment and self-expressiveness, are empirically shown to determine perceived usefulness. In addition, perceived ease of use, rewards, operational quality of device, and design/story have been showed to significantly and directly affect perceived enjoyment. It was also confirmed that self-efficacy and operational quality of device are the antecedents of perceived ease of use. Based upon the statistical results, some useful guidelines for game development and market penetration strategies are also provided.

• Journal of Bio-Environment Control
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• v.20 no.3
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• pp.204-210
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• 2011

This experiment was conducted to investigate the effect of water states (water, osmotic potential and turgor pressure) of fruit vesicle and leaf on soluble solids and organic acid contents of fruits of 'Shiranuhi' mandarin hybrid, M16 A line during the fruit maturing season in plastic house cultivation. The 'Shirauhi' grafted on 'Swingle citrumelo', strong strength of rootstock, produced fruit with lower soluble solids and organic acid content than 'Trifoliate' orange rootstock. The fruits vesicle water potential and turgor pressure measured before dawn in 'Swingle citrumelo' were higher tendency than the 'Trifoliate' orange, but osmotic potential values were lower than the 'Trifoliate' orange. The changes of leaf water potential were very similar to the fruit. The results suggest that in the 'Shirauhi' fruits grafted on two rootstocks changes of soluble solids and organic acid content of the fruit were influenced by the leaf water potential and the osmotic potential of the fruit vesicles, which might be caused by the difference of root distribution between two rootstocks.

• The Korean Journal of Food And Nutrition
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• v.28 no.1
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• pp.60-65
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• 2015

Mushrooms (Pleurotus ostreatus) have been used as traditional remedies as well as food sources. This study particularly used an extract of Pleurotus ostreatus among many other mushrooms for research to figure out the antioxidant activity and an effect of cytotoxin. The result of antioxidative effect was significantly increased at the high concentration. The otal contents of polyphenol and flavonoid were $30.2{\pm}0.7$ and $20.4{\pm}0.6$ respectively. Both reducing power and DPPH radical scavenging activities are highest at 5.0 mg/mL of concentration. According to the research about cytotoxin of normal cell, an extract of Pleurotus ostreatus showed no existence of toxicity based on 80.5% of viability. Meanwhile, Pleurotus ostreatus is not strongly effective on the growth of cancer cell, indicating anti-cancer effect has a quite high range of viability up to $70.0{\pm}5.3%$ in 5 mg/mL of concentration.

• The Korean Journal of Food And Nutrition
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• v.25 no.4
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• pp.1081-1085
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• 2012

This study was performed in order to determine the processing conditions (pre-drying at room temperature for 0 or 30 min, frying at $160^{\circ}C$ for 1 min or at $180^{\circ}C$ for 40 sec, and soaking for 0~24 h) of Sasambeong recorded in the "Sumunsasul". The Sasambeong was evaluated for crude lipid content, hardness, Hunter's color values, and sensory characteristics. After pre-drying at room temperature for 30 min, the crude lipid contents and hardness of Sasambeong were significantly increased. In addition, the crude lipid content and hardness of Sasambeong did not differ significantly according to the frying conditions. After pre-drying, the sensory characteristics of Sasambeong showed more improvement. The crude lipid content, hardness, Hunter's color values, and sensory characteristics of Sasambeong, which were prepared according to different soaking times (0, 6, 12, or 24 hr) were investigated. As soaking time increased, the crude lipid content and hardness of Sasambeong decreased with a range of 25.43~24.31% and 525.90~388.98 g, respectively. The sensory characteristics of Sasambeong showed no significant difference according to the soaking time. Overall, we think that the best processing conditions of Sasambeong were pre-drying at room temperature for 30 min and then frying at $160^{\circ}C$ for 1 min.

• Korean Journal of Environmental Agriculture
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• v.18 no.4
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• pp.378-383
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• 1999

Changes of the spectroscopic characteristics of the organic matter fractions and circular filter paper chromatograph were assessed for the bark and piggery manure composts during the composting. as an approach to base the criteria of the compost maturity evaluation. Contents of humic acid-C (HA-C) and fulvic acid-C (FA-C) in both bark and piggery manure composts were decreased as the composting got closer to maturity, but the ratios of HA-C/FA-C were increased. During the composting. ${\Delta}log$ K values were decreased, but RF values were increased. Humic acid of the mature bark compost after 120 days of composting was A-type, as compared to Rp-type for the raw bark and B-type for the immature compost. However. humic acid of the mature piggery manure composts after 40 days of composting was B-type, indicating the humification of the organic matter fractions continued at this stage. Circular filter paper chromatograph of the mature bark compost exhibited the regular sawteeth pattern at the edge, but that of the mature piggery manure showed an irregular sawteeth pattern. Results demonstrated that spectroscopic characteristics and circular filter paper chromatograph of the organic by-product composts might be employed for the compost stability assessment.

• The Korean Society of Law and Medicine
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• v.20 no.3
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• pp.211-233
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• 2019

The 「Health Care Workforce Support Act」 was came into effect on 29 October 2019. Health care workforce is the most important national health resource, and the quantity and quality of them is also related to the level of national health care. This study examined the background and major contents of this Act and suggested future improvement by analyzing main issues. Th e Act was enacted to support the health care workforce for their recruitment and better working environment. By stipulating the establishment of the master plan, management of the supply and demand, improvement of working environment for health care workforce, the act contributed to raise the quality of health service and health promotion. Given that the act was developed in consideration to support of health care workers, it has many meanings. However, it is necessary to reexamine the above-mentioned five issues in order to develop the effective law while utilizing the significance of the law for health care workforce support and has to revise as soon as possible.

• Korean Journal of Soil Science and Fertilizer
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• v.37 no.3
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• pp.171-176
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• 2004

To investigate the availability of nitrogen decomposed and released from liquid pig manure (LPM), this experiment was performed with red pepper (Capsicum annuum L., cv. Hanbando), and Chinese cabbage (Brassioa campestris L., cv. Konaenggiyeureumbaechoo) in 2001. Based on the total nitrogen of chemical fertilizer, both red pepper and chinese cabbage were treated with three and four applications of LPM, respectively. Yield of red fruits in the red pepper was increased by an enhancement of LPM application. However, that of chinese cabbage was enhanced with a reducing supply of LPM. Biosynthesis of polyamine in both crops such as red pepper and chinese cabbage was large in the early growth stage and was not increased by LPM application. The high biosynthesis of bound polyamine, monoamine and diamine, in the early growth stage was changed in an increase of conjugated polyamine and polyamine with a process of crop growth. Inorganic components in the leaf of red pepper by LPM application were equal or slightly lower than in chemical fertilizer, however, from the middle growth stage, contents of phosphate and potassium were increased. Those of chinese cabbage were slightly decreased from the early growth stage to the late. Considering this experiment, the thoughtless supply of LPM has not resulted in certain crop damages, and an application of LPM to increase a yield was different from crop species at some extent.