• Communications of Mathematical Education
• /
• v.36 no.4
• /
• pp.589-610
• /
• 2022

This study aimed to derive pedagogical implications by comparing and analyzing how the concept of pi is taught in 10 different elementary mathematics textbooks, which are scheduled to be applied from 2023. We developed a textbook analysis framework by previous studies on the concept of pi and the teaching of pi, and analyzed in terms of three instructional elements (i.e. inferring conceptsof pi, understanding properties of pi, and applying relationships). We derived the need to emphasize various contexts for estimation of pi, presentation of problem situations that provide motivation to actually measure diameters and circumferences, providing an opportunity to explore the properties of measurement, and an experience the flexibility of selecting an approximate value of pi. Based on the above conclusions and pedagogical implications through the research results., we suggested ways to teach the concept of pi in elementary mathematics and improvement points for developing textbooks focusing on the context of introduction of pi and the use of technological tools.

• Journal of Family Resource Management and Policy Review
• /
• v.26 no.1
• /
• pp.59-73
• /
• 2022

This qualitative study focused on the activation of cooperative child care sharing centers'. Eight centers nationwide were selected as example cases in accordance with region (large city, small and medium-sized city, county unit), opening time, operating institution, location, full-time care for dual-income children, and participation in the 2020 care community pilot project. Co-researchers visited each center together to observe the site and conducted in-depth interviews with the head of the center or dedicated staff using semi-structured questionnaires. Interview data were analyzed using triangle verification and transcribed : the data were then grouped into 12 categories and 34 subcategories. From this, the following three topics were derived: the main functions, operational difficulties, and activation conditions. In conclusion, four suggestions are made: 1. proper relationship with the Family center, the cooperative childcare sharing center, and the local care communities 2. activation plan through "solution of operational difficulties" 3. "extension" of the cooperative child care sharing center 4. the role of the Ministry of Gender Equality and Family, the Korea Institute for Healthy Family, local governments, and Family Centers.

• The Journal of the Convergence on Culture Technology
• /
• v.8 no.5
• /
• pp.341-349
• /
• 2022

This study explored in-depth emotional experiences influenced by childhood trauma of adult female survivors. For this purpose, in-depth interviews were conducted with married adult women who experienced trauma in their childhood. The collected data were analyzed using Colaizzi phenomenological research method. As a result of the study, 7 categories were derived: 'children who cannot protect themselves', 'childhood trauma,' 'insecure attachment and good child syndrome,' 'difficulties in interpersonal relationships,' 'difficulties in raising children,' 'somatization symptoms,' 'finding myself who is lost.' In addition, this study aims to understand the psychological experience of children in the family and the relationship between parents and children and the growth experience of healing them by comparing and contrasting the two cases of trauma. The foundation for healthy ego-resilience and emotional well-being has been laid through the research results on negative and maladaptive emotional experiences reflected throughout the life of adult women who suffered childhood trauma.

• The Mathematical Education
• /
• v.62 no.2
• /
• pp.257-268
• /
• 2023

The purpose of the study is to analyze the characteristics of open-ended tasks in terms of cognitive demands. For this purpose, we analyzed characteristics of open-ended tasks presented in the sequence units of three high school mathematics textbooks. The results of the study have revealed that low cognitive demand levels of open-ended tasks had characteristics including procedures within previous tasks or within those tasks. On the other hand, high cognitive demand levels of open-ended tasks had characteristics of actively exploring new conditions to gain access to what is being sought, requesting a basis for judgement, linking various representations to the concepts of sequences, or requiring a variety of answers. These results are significant in that they not only specified the characteristics of open-ended tasks with high cognitive demands in terms of the intended curriculum, but also provided a direction for the development of open-ended taks with high congitive demands.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2023.05a
• /
• pp.195-195
• /
• 2023

유기물오염은 호수와 하천에서 가장 흔히 나타나는 오염의 형태이다. 개발도상국에서는 하수처리시설이나 생활용수처리시설에서 유기물이 처리되지 않아 수중의 유기물함량이 증가하여 피해가 나타난다. 물환경보전법에 따라 유기물질을 측정하는 지표에는 BOD, COD, TOC가 있다. 그 중 BOD, COD 측정은 절차가 복잡하고 오래 걸리며, 생물분해가 불가능하거나 유독물질이 존재하는 유기물질인 경우에는 낮은 결과 또는 측정이 불가능하다. 이러한 이유로 환경부에서는 TOC중심관리로 전환되고 있다. 대부분의 수질항목 측정의 경우 현장시료를 채취하여 실험실에서 분석하는 수분석을 이용한다. 하지만 수분석의 경우 인력이 많이 투입되고 분석수가 한정적이며, 정교한 과학 장치를 갖춘 전문 실험실을 필요로 한다. 반면에 TOC는 짧은 시간 내에 측정이 가능하고, 안정적인 산화로 유기물질 총량을 정확하게 측정이 가능하다. 또한 위해성 물질을 발생시키지 않는 친환경적 방법이라 환경오염 감시에 많이 활용된다. 본 연구에서 분광측정기 중 하나인 S-CAN을 통해 하천의 TOC분석을 진행하였다. 대상지는 안동에 위치한 하천실험센터와 금호강 진천천으로 S-CAN측정과 채취한 시료의 수분석 결과를 비교하였다. 이를 통해 TOC측정 및 기기에 대한 정확도분석을 실시하였다. 본 연구를 통해 S-CAN을 활용한 TOC중심의 수질모니터링하여 수질의 특성을 탐구하고, TOC기초연구를 통한 유기물오염도 지표로서 해석할 수 있다. 수분석 자료를 활용한 정확도 비교를 통해 하천 TOC센서 측정 적용에 대한 기초자료 제공과 측정기기의 현장적용성을 판단 할 수 있다. TOC측정 및 분석을 통해 유기물질량을 실시간으로 정확하게 측정하게 되면 수질관리 효율성이 높아지고, 하천에 유입되는 유기물질량과 농도를 정확하게 파악하여 실효성 있는 정책 수립 및 효율적인 수질관리를 할 수 있다.

• Korean Journal of Culture and Social Issue
• /
• v.21 no.2
• /
• pp.159-176
• /
• 2015

This study was conducted to revalidate CQS and to examine the factors influencing cultural intelligence among Korean students studying abroad. 143 Korean students in USA and Canada were participated in the survey. Confirmatory factor analysis identified a model with four factors and CQS has negative correlation with acculturation stress and academic stress but positive correlation with subjective wellbeing. This findings suggest that CQS is a reliable and valid scale. Hierarchical regression analyses confirmed that personality is more significant predictor than cultural experiences for CQS. Discussion focuses on the importance of the findings, limitations and future directions.

• Journal of Korea Entertainment Industry Association
• /
• v.13 no.2
• /
• pp.155-167
• /
• 2019

The aim of this study was to examine the experiences of music therapists in using their voice clinically. The researcher conducted in-depth interviews with seven music therapists who were able to explain their experiences in using voice. Each interview was analyzed using the phenomenological method of Amedeo Giorgi. The data analysis yielded 9 sub-categories and 6 components: "promotion of various feelings due to clinical use of voice", "voice use depending on the therapist's personality", "voice use for therapy", "positive musical experiences with clients in using voice", "difficulty in using voice as a tool for music therapy", and "attempt to change unsatisfactory voice". The result showed that the music therapists had both positive and difficult experiences with their clients in using their voice. Their instances of perceived unsatisfactory voice prompted them to develop themselves personally and professionally. This study is intended to provide a general understanding of voice use by music therapists and offer a solid basis for music therapists to study voice in the future.

• Environmental and Resource Economics Review
• /
• v.31 no.4
• /
• pp.619-644
• /
• 2022

The purpose of this study is to estimate the economic benefit of improving ground water quality in Jeju Island, where groundwater pollution has recently become a social issue and various water quality improvement projects are being promoted. By applying the contingent valuation method, an online survey was conducted on Jeju Island residents to analyze the response data of 542 respondents and estimate the mean willingness to pay using 16 models. The estimation of the double-bounded dichotomous choice model confirmed that each household was willing to pay 28,008 won per year, with the willingness to pay estimated at a minimum of 17,762 won and a maximum of 37,416 won based on different models. The total annual benefit for Jeju Island's ground water quality improvement was estimated to be about 8.66 billion won , and socioeconomic factors influencing willingness-to-pay were investigated. This study is expected to serve as a foundation for the development of environmental improvement policies by assisting in the understanding of Jeju Island's unique water resource environment.

• Journal of Korea Entertainment Industry Association
• /
• v.13 no.6
• /
• pp.79-86
• /
• 2019

Drama, as an artistic stage performance style of traditional life style, has built a bridge of communication between the two nationalities in China and Korea. However, the different performance procedures and cultural backgrounds of different countries make the theatrical arts of China and Korea present different stage manifestations. The dissemination and influence of the Chinese drama and in Korea are mainly studied in this paper. By using the methods of work analysis and text analysis, this paper further explores the evolution history of drama communication, the influence of Chinese drama on Korea, which embodies the cultural transmission, and explores the influence of communication and the acceptance degree of the audience. It has the significance and value of research, at the same time, it promotes the long-term development of national culture.

• Korean Journal of Legislative Studies
• /
• v.27 no.3
• /
• pp.155-188
• /
• 2021

This study examines dynamics in election news making. It is important to understand when and how news media produce election news in order to grasp news making and voting behavior. The news media sometimes make election news by focusing on issues and policies. Often they frame elections as a game and focus on election strategies while covering elections. This article argues that as time goes by during the election period, the number of policy news tends to decrease while the frequency of strategic news is likely to increase. Also, TV's and newspapers show distinctive patterns of election news making. In order to examine the arguments, this study categorizes election news stories into policy and strategic news stories produced during the 2020 Korean congressional elections and constructs daily time-series data of them. The results of structural break and regression analyses partially support the arguments.