• Education of Primary School Mathematics
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• v.19 no.1
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• pp.47-60
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• 2016

The purpose of this study is to analyze how the qualitative research is applied to mixed method research and thereby to gain an insight to suggest reasonable ways of employing qualitative method in order to accomplish intended goal of research, especially in the field of mathematics education. For that purpose, this study carefully selects and analyzes 5 article that used mixed method and were published by Education of Primary School Mathematics Journal in 2012. Unlike those a few previous studied on mixed method that focused on producing general trend by simply showing quantitative information on what the frequence of used research topic, content, methods combination, quantitative methods, and qualitative methods, this study provides detailed result of qualitative analysis on mixed studies. In sum, this study concludes with practical and in-depth suggestions on how to improve validity of mixed research and qualitative research in the field of mathematic of education.

• Communications of Mathematical Education
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• v.35 no.2
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• pp.137-152
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• 2021

Qualitative research has become a growing area of interest among the Korean educational researchers for the last two decades. As a consequence, the number of studies based on qualitative methods has rapidly increased while the quality of qualitative research has not gained much credit among scholars in Korea. This study explores to current practice of qualitative approaches in mathematics education-related studies. With this in mind, this study also seeks ways to improve the validity and trustworthiness of qualitative approaches, and to present implications for the practical practice of qualitative approaches in mathematics education. To this end, a general trend was investigated by conducting a basic analysis of 13 papers that used qualitative approaches and published in Communications of Mathematical Education from 2019 to 2020. Of the 13 papers. Through the basic analysis, 6 out of 13 papers were selected as the object of qualitative text analysis. The result of this qualitative text analysis discusses issues related to the validity and trustworthiness of qualitative research in a detailed manner. In conclusion, based on the results of this qualitative text analysis, this study suggests several key points to keep in mind when applying qualitative approaches in the field of mathematics education in the future.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.54 no.2
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• pp.172-180
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• 2009

This study was carried out to compare the physicochemical characteristics and sensory quality of Sogokju (Korean traditional rice wine) prepared with waxy rice varieties. Among tested waxy rice varieties, highest protein contents (8.11%) was observed in cv. Sangjuchal, and highest whiteness and L-value were observed in cv. Hwaseonchal, while no significant differences in gelatinization temperature could be observed among tested varieties, and cv. Boseokchal and Sinseonchal exhibited higher breakdown viscosity compared to the others. The alcohol contents of Sogokju with waxy rice varieties ranges from 13.0 to 13.4%, and the brix degree and turbidity were within the range of 20.5 to 24.6 $^{\circ}Bx$, and 0.0344 to 0.0530, respectively. The highest L-value (6.90), b-value (l.45), pH (4.79), total acidity (0.8384%), and glucose content (10.843 g/100 ml) could be observed in Sogokju made with cv. Sangjuchal. The organic acids such as succinic acid, malic acid, citric acid and oxalic acid could be detected in Sogokju. Although no variety-dependant differences in appearance, aroma, and taste could be found in sensory evaluation, Sogokju made with cvs. Sinseonchal, Haepyeongchal, and Hwaseonchal showed higher overall quality than Sogokju made with cv. Dongjinchal, which is most widely used for Sogokju used for Sogokju production nowadays.