• Korean Journal of Mathematics
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• v.27 no.2
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• pp.465-474
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• 2019

Let ${\mathbb{Z}}$ be the ring of integers and ${\mathbb{Z}}[X]$ (resp., $h({\mathbb{Z}})$) be the ring of polynomials (resp., Hurwitz polynomials) over ${\mathbb{Z}}$. In this paper, we study the irreducibility of Hurwitz polynomials in $h({\mathbb{Z}})$. We give a sufficient condition for Hurwitz polynomials in $h({\mathbb{Z}})$ to be irreducible, and we then show that $h({\mathbb{Z}})$ is not isomorphic to ${\mathbb{Z}}[X]$. By using a relation between usual polynomials in ${\mathbb{Z}}[X]$ and Hurwitz polynomials in $h({\mathbb{Z}})$, we give a necessary and sufficient condition for Hurwitz polynomials over ${\mathbb{Z}}$ to be irreducible under additional conditions on the coefficients of Hurwitz polynomials.

• The Korean Journal of Community Living Science
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• v.18 no.2
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• pp.335-348
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• 2007

This study aimed to investigate how the current elementary school teachers think about nutrition education, how they are teaching, and what kind of problems have occurred. And this study was made to provide basic materials to be used for the effective nutrition education in the elementary school. The survey was done on 60 elementary school teachers and 570 elementary school students of the 5th and 6th grade in Gyeonggi Province by questionnaire and analyzed for the perception of nutrition education, current status of nutrition education, nutrition knowledge and cooking knowledge. The average scores of nutrition knowledge were 2.72 for male and 3.75 for female students out of full score of 5. The fifth grade students learned more nutrition education than the sixth grade ones in accordance with the different curricula. Nutrition education was taught as apart of other subjects(87%) and mainly done by lectures. For most of the students, information source of the nutrition education was the meal service(47.4%) and the most common one was the Internet that 38.1 % of the teachers used. Most of the students responded that nutrition education was necessary in the curriculum of elementary school for proper growth(36.2%), intelligence(25.9%), health(21.5%), and dieting(16.4%). The perception for the suitable teacher was in the order of nutrition specialist and dietician. And the right time of the related class was in the order of spare time everyday, a special activity time, and the meal service time. The important contents of nutrition education were in the order of proper eating habits, growth & nutrition, food hygiene and diseases. Nutrition problems of the elementary students were in the order of unbalanced diet, too much ingestion of processed and instant foods, lack of table manners, and child fatness and weakness. 80.0% of the teachers supported the early nutrition education and demanded it should begin when children are in kindergarten. The analysis showed that nutrition education should be taught by parents(29.4%), teachers(29.2%), and nutritionists(25.9%) and that family and school should cooperate closely. Main responses of the teachers to the children's problems were that they had too much instant food, did not eat in a variety, and had no manners in eating. Ironically, they thought malnutrition, fainting and growth stunt were not important nutrition related problems.

• Journal of the Korean association of regional geographers
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• v.18 no.3
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• pp.268-282
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• 2012

International marriage migrants from developing to developed countries are to seek a better economic condition. There are only a few empirical research on comparing and analyzing economic condition of marriage migrants before and after marriage. This study attempted to analyze the relationship between the cognition on the change of economic condition before and after marriage and the socio-economic characteristics of Vietnamese international marriage female migrants. About 80% of interviewees of this study were motivated to marry Korean men for economic reasons; however, their household economic level was relatively low. Reflecting the household economic level, about half the Vietnamese women considered that there was very little difference in the economic condition before and after marriage; while, the percent of women considering the current economic condition as getting better were more than 4 times of that of women considering as becoming worse. The cognition on the economic condition change before and after marriage was positively correlated with the level of education attainment of husbands and themselves, the Korean language ability, state of occupation in Korea, the level of husband's income, involvement of management of living expenses and length of residence in Korea. The occupation in Vietnam and the state of remittance were not significantly related to the cognition on the economic condition change before and after marriage. Vietnamese marriage female migrants were highly motivated to have a job out of home to improve the economic condition of their own family and natal family. Concreted alternative programs should be made to help those women to work out of home.

• Korean Journal of Health Education and Promotion
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• v.10 no.1
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• pp.9-20
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• 1993

This study was conducted to show one case model for a community nutrition program as a part of the public health systems. The purpose of this study is to evaluate the effect of the nutrition education through the Knowledge(K), Attitude(A), and Practice of the nutrition that is the Behavior-Diagnosis(Be-D). The Nutrition Education was done for 33 housewives whom live in Sudong-Myeun, Namyangju-Kun, Kyungki-Do. It had been performed eight times during April 3rd through May 30th, 1991. We investigated actual conditions of objects about K, A, Be-D in the nutrition, and the Food Environment(En) separately before and after the nutrition education by questionnaire and interview. The results of the research turned out as follows ; 1. The comparison of the scores before and after nutrition education showed significant increase in the knowledge and attitude. 2. The scores of the Be-D were also significantly higher after education, especially in the number of foods taken per day, the balanced diet, the general food habits for adult, and amounts of intake of nutrients showed significant increase of lipid, calcium, Vit. A, $Vit B_2$, Vit. C after nutrition education. 3. Multiple regression analysis showed that the scores of the Knowledge and En were significantly associated with the number of food taken per day for condition of adjusting socio-demografic factor and A effect. Also, En was important variable in explanation of the balanced diet and A, En were important in the general food habits for adult.

• Phonetics and Speech Sciences
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• v.5 no.3
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• pp.83-93
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• 2013

Vocal hygiene education is an indirect training approach to improve vocal function by educating all facets of optimal vocal health. Satisfaction levels of participants might be an important component of this indirect therapy for voice disorders. The authors aimed to investigate the satisfaction levels of vocal hygiene education in 51 patients with voice problems. We classified voice disorders of the participants according to three etiological categories (subgroups): organic, neurogenic, and functional. The survey consisted of three parts: 1) a condition of vocal hygiene education, 2) a degree of satisfaction of the present education, and 3) a request for future education. Participants responded to each item of the survey using a five-point Likert scale of 1 to 5 (1 being not at all and 5 being extremely). They also wrote down personal comments of improvement. Participants scored the vocal hygiene education offered by the speech-language pathologists between '3' and '4'. Specifically, the participants were highly satisfied with the specific and comprehensible explanation/instruction given by their speech-language pathologists. However, they were less satisfied with the tuition fee for the therapy sessions. Vocal hygiene education is offered individually to people in a clinical setting. Our results support the notion that vocal hygiene education can be an integral aspect of the treatment of voice problems in most cases.

• Journal of the Korea Society of Computer and Information
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• v.22 no.1
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• pp.143-151
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• 2017

In this paper, we suggest a method utilizing OSHW(Open Source HardWare) in order to raise up students who are competent in IT convergence and integration as a basic research to improve the university software education. Software education cannot be too much emphasized in the age of big change of Fourth Industrial Revolution. It hardly seems to have changes in the software education area of university where has to train competent technicians to be deployed into the industrial field, although software education is planned even in elementary, middle, and high school. In this situation, we expect that utilizing OSHW in software education can result in gaining a meaningful effect. However, we don't have various and systemic approach which use it as a education system component, unlike the response and necessity OSHW market. Therefore in this paper we suggest models which constitute software education environment based on OSHW and exemplify how to use it in each model. In addition, we compare and analyze each model in order to give a criteria to choice one of them according to the condition.

• Journal of Fisheries and Marine Sciences Education
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• v.18 no.3
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• pp.302-313
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• 2006

This paper explores the efficacy on enforcing empowerment for the beginner special education teachers' adaptation of teaching life. Empowerment is widespread public concern regarding the role of the teacher in decision made in the operation of schools. Therefore what is discussed to be definition, a central component and strategies of empowerment based upon the through literature review. Empowerment is defined in terms of teachers power to participate in decision making about teaching and learning condition, especially is related to disabilities. And Empowerment has six components, decision making, professional growth, status, self-efficacy, autonomy, and impact. When novice teachers in special education utilize self-empowerment strategy, they have the opportunities for greater status and increasing power.Finally, empowerment is at the heart of special education teachers' adaptation of teaching life. It is suggested that follow-up studies should be conducted to develop indicator for assessing what teachers in special education perceived their empowerment in overall work. Also higher education program must address this issue in pre-service training of administrators and teachers in special education.

• Human Ecology Research
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• v.54 no.1
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• pp.45-56
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• 2016

This study investigates: (1) children's proactive aggression according to age and the emotional condition of the counterpart child, (2) if children's intention attribution, emotional attribution (victim and perpetrator) and language ability influences proactive aggression according to age and the emotional condition of the counterpart child. The subjects were 68 3-year-old and 70 5-year-old children. Each child was individually interviewed with picture cards. Collected data were coded and analyzed in SPSS with frequencies, percentiles, means, standard deviations, repeated measures analysis of variance (ANOVA), t -tests, Pearson correlations and multiple linear regression. The results showed that 3-year-old children showed more proactive aggression and physical aggression than 5-year-old children. They showed more proactive aggression when counterpart child was in a happy condition than in a fear condition. Intention attribution, emotional attribution, and language ability partially affected a children's proactive aggression according to age and the emotional condition of the counterpart child. This study has practical implications for teachers in regards to children's proactive aggressive behavior at child care centers. Teachers use specific to develop advantages as the basis for developing aggression prevention programs that consider emotional and cognitive factors.

• Journal of Korean Library and Information Science Society
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• v.39 no.3
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• pp.161-186
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• 2008

Through the present training condition of Korean teacher librarians and their supply-demand prospects, this paper pointed out problems both of the educational system and of its supply-demand and suggested the solution as well. Particularly, focusing on the educational system of teacher librarians and the present condition of the training organizations, this paper predicted their supply ability in the future and analyzed the demand which is necessary, when applying the standards of Korean Library Association and School Library Promotional Law with the selective situation of teacher librarians. In this way, the problems of supply-demand imbalance were indicated and, as a method for training the proper number which is required for the future demand, the rearrangement of the approval number of a course of study for the teaching profession and the establishment of Library and Information education department in education college were proposed.

• The Korean Journal of Ecology
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• v.6 no.4
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• pp.21-28
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• 1983

The relationship of Paramecium bursaria with its symbiiotic Chlorella was studied in the view-point of photosynthesis and its product movement. The following results were obtained. In 1/10 dilution of bacterized medium green Paramecium grew and survived better than colorless Paramecium. P. bursaria was competitively related to its symbiotic algae as far as the change of total chlorophyll contents was concerned. Therefore, in continuous darkness total chlorophyll contents of green Paramecia decreased proportionally to the time course. Under the condition, on the other hand, that the bacterized medium was not replenished over 10 days, total chlorophyll contents in P. bursaria increased by over 2 times as much as those in normal condition. By means of Oxygen Diometer it was assured that green Paramecium was able to utilize thoitic the great part of oxygen evolved photosynthetically by its symbiotic algae. Also when was given many starch grains were found in symbiotic chlorella through electron micrography. These data suggested that P. bursaria was photosynthetically given lots of benifit by its symbiotic chlorella.