• Journal of the Korean School Mathematics Society
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• v.8 no.1
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• pp.101-116
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• 2005

The purpose of this study is to survey mathematics teacher's cognition of proof along with their proof forms of expression and proof ability, and to explore the relationship between their proof scheme and teaching practice. This study shows that mathematics teachers tend to regard proof as a deduction from assumption to conclusion and that they prefer formal proof with mathematical symbols. Mathematics teachers also recognize that prof is an important area in school mathematics but they reveal poor understanding of teaching methods of proof. Teachers tend to depend on the proof style employed in mathematics textbooks. This study demonstrates that a proof scheme is a major factor of determining the teaching method of proof.

• The Journal of the Convergence on Culture Technology
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• v.3 no.4
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• pp.153-158
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• 2017

The study aims to provide the potential for commercialization of traditional martial arts selection. First, we was reviewed by comparing the general purpose and major enterprise of the Koreataekkyon and the Korean Taekkyon Association. Second, analyzed the related results of the Business and the related papers published in the recently 3 years. Through this, I have following suggestions. A new departure from the emerging world should challenge the new paradigm beyond traditional culture and sports. To do so, one must first excavate the sports industry (startups). Second, there should be education about entrepreneurship and entrepreneurship. Third, we need to establish a dedicated organization that supports business.

• Journal of Distribution Science
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• v.16 no.11
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• pp.5-10
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• 2018

Purpose - The recent establishment of many varieties of English language in the globe has created many models of English such as world Englishes (WEs), English as a Lingua Franca (ELF), English as a family of languages, and English as an Intercultural Language (EIcL). Among the models, the present study highlights 'English as an intercultural language (EIcL)' in relation to distribution science business English teaching to elucidate what EIcL is and why it is critical and how it can be realized in the business English classrooms. Research design, data, and methodology - This study look into the EIcL paradigm that empowers all active users to view English as universal and at the same time enables them to develop critical skills to bridge intercultural gaps or to cross borders. Results - Rather than just focusing on an acquisition of standardized English(es), EIcL serves as a major contextual factor facilitating success in getting competence among the different English languages. Conclusions - EIcL is a promising and ultimately rewarding approach to the contemporary business English teaching arena. EIcL should be achieved through policies, textbooks or living abroad, and, above all, learners/teachers' active awareness and understanding' of the EIcL mainstreams.

• Journal of the Korean Home Economics Association
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• v.43 no.1 s.203
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• pp.129-144
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• 2005

The purposes of this study were to find the general trends and differences factors influencing single mothers' psychological well-being, and, analyze the effects of family, and social variables on their psychological well-being. The subjects were the 284 single mothers living in Kwangju and Chonnam. The data were analyzed with frequency, t, F, and Pearson's r test, and by multiple regression using SPSS. The major findings were as follows: 1. Single mothers' family variables were lower than the median, but instrumental support was higher than emotional support. Single mothers' psychological well-being was found to be around that of the median value. 2. Single mothers' psychological well-being was significantly different from family stress, family resources, mother-child conflicts, income, emotional support, participation of education program, and institutional support. 3. Life satisfaction of single mothers was influenced by institutional support, family stress, family resources, and emotional support. Depression among single mothers was influenced by family stress, family resources, mother-child conflicts, and institutional and emotional support.

• Korean Journal of Artificial Intelligence
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• v.10 no.1
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• pp.15-19
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• 2022

This study is to understand the relationship between turnover and various conditions. Turnover refers to workers moving from one company to another, which exists in various ways and forms. Currently, a large number of workers are considering many turnover rates to satisfy their income levels, distance between work and residence, and age. In addition, they consider changing jobs a lot depending on the type of work, the decision-making ability of workers, and the level of education. The company needs to accept the conditions required by workers so that competent workers can work for a long time and predict what measures should be taken to convert them into long-term workers. The study was conducted because it was necessary to predict what conditions workers must meet in order to become long-term workers by comparing various conditions and turnover using regression and decision trees. It used Microsoft Azure machines to produce results, and it found that among the various conditions, it looked for different items for long-term work. Various methods were attempted in conducting the research, and among them, suitable algorithms adopted algorithms that classify various kinds of algorithms and derive results, and among them, two decision tree algorithms were used to derive results.

• Journal of Distribution Science
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• v.21 no.5
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• pp.31-41
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• 2023

Purpose: Electric vehicle (EV) technology started in 2015 in Thailand. The Thai Government has indicated that 30% of all cars produced in Thailand by 2025 will be EVs. Using EVs in Thailand will reduce road pollution and increase energy efficiency, especially in major cities. Hence, the adoption of EVs in the country has been promoted. This study pointed out that social influence, facilitating conditions, perceived enjoyment, environmental concern, attitude, and perceived behavioral control are key factors affecting the behavioral intention to adopt EVs among logistic and distribution firms in Thailand. Research design, data, and methodology: 500 top management, middle management and purchasing managers of logistic and distribution firms in Thailand are surveyed. The study employed judgmental, convenience, and snowball sampling. Confirmatory Factor Analysis (CFA) and Structural Equation Model (SEM) are the main statistical tools for data analysis. Results: The results show that all determinants impact customers' willingness to adopt EVs, except perceived enjoyment and environmental control. Conclusions: The study proposes to promote the incentives by decreasing electricity prices and endorsing EVs purchase to accelerate the adoption of EVs in Thailand. Therefore, future policies should focus on behavioral intention toward EVs amongst logistic and distribution firms for enhancing the future of mobility in Thailand.

• Journal of the Korea Society of Computer and Information
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• v.18 no.12
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• pp.159-166
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• 2013

The primary objectives of this study were to identify who is happier in workplace. To do this, this study proposed and analyzed a theoretical model consisting of demographic factors such as sex differences, age band, marital status, child quantity, religion, education level, position, job, income etc, psychological factors such as extroversion, neurosis, positive belief and happiness level. The major results of analysis reveal that first, both demographic factors and psychological factors have a positive effect on the happiness level of office-worker. Second, child quantity, neurosis and positive belief is an important factors in predicting office-worker's happiness. In conclusion, the implication of our research is to verify factors to promote the happiness level of office workers.

• Journal of Food Hygiene and Safety
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• v.30 no.2
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• pp.132-142
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• 2015

The purpose of this study was to investigate the perception and information needs about food additives from the parents of elementary school children, and to develop a smartphone application (App) providing information about food additives, and finally to assess its educational effects. A survey was conducted in April 2013 by using a self-administered questionnaire, and total 358 responses were collected from the parents living in Seoul and Gyeonggi province. While purchasing processed foods, parents considered safety (40.5%) as the most important factor, and first checking item except production and expiration dates was origin labelling (35.4%), and chose foods with less food additives (63.1%). Parents recognized food additives as the most dangerous (42.7%), and 75.1% responded the level of danger as 'very dangerous'. However, 82.4% of parents didn't have experiences to get educations about food additives. Based on their information needs including the safety, legal standards and the foods containing food additives. a smartphone App designated as 'Catch up Food Additives' consisting of the definition, safety, food labelling guideline, management, animation about food additives was developed. When the App was exposed to the parents (n = 27), their negative perceptions on food additives were improved significantly. These results showed that providing information and education about food additives using smartphone App was very fast and effective for the promotion of risk communication on food additives with the parents.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.4
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• pp.881-886
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• 2018

Over the last several decades, the advances in computer engineering technology have led a new paradigm of data-intensive research in the field of scientific applications. A collaborative work environment for storing, sharing and analyzing data is required for researchers of geographical distance. The Korean government supports the Research & Education network(KREONET) and the Global Science experimental Data hub Center(GSDC) to strengthen the nation's competitiveness. The KREONET has upgraded its backbone to 100Gbps to accommodate demand to transfer data fast among the global major experimental sites. This paper introduces the test result between high performance nodes reserved for big data transfer.

• Journal of Ecology and Environment
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• v.44 no.1
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• pp.33-40
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• 2020

Background: Understanding the geographical distribution of a species is a key component of studying its ecology, evolution, and conservation. Although Schlegel's Japanese gecko (Gekko japonicus) is widely distributed in Northeast Asia, its distribution has not been studied in detail. We predicted the present and future distribution of G. japonicus across China, Japan, and Korea based on 19 climatic and 5 environmental variables using the maximum entropy (MaxEnt) species distribution model. Results: Present time major suitable habitats for G. japonicus, having greater than 0.55 probability of presence (threshold based on the average predicted probability of the presence records), are located at coastal and inland cities of China; western, southern, and northern coasts of Kyushu and Honshu in Japan; and southern coastal cities of Korea. Japan contained 69.3% of the suitable habitats, followed by China (27.1%) and Korea (4.2%). Temperature seasonality (66.5% of permutation importance) was the most important predictor of the distribution. Future distributions according to two climate change scenarios predicted that by 2070, and overall suitable habitats would decrease compared to the present habitats by 18.4% (scenario RCP 4.5) and 10.4% (scenario RCP 8.5). In contrast to these overall trends, range expansions are expected in inland areas of China and southern parts of Korea. Conclusions: Suitable habitats predicted for G. japonicus are currently located in coastal cities of Japan, China, and Korea, as well as in isolated patches of inland China. Due to climate change, suitable habitats are expected to shrink along coastlines, particularly at the coastal-edge of climate change zones. Overall, our results provide essential distribution range information for future ecological studies of G. japonicus across its distribution range.