• Journal of Microbiology and Biotechnology
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• v.33 no.3
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• pp.288-298
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• 2023

Host defense peptides are expressed in various immune cells, including phagocytic cells and epithelial cells. These peptides selectively alter innate immune pathways in response to infections by pathogens, such as bacteria, fungi, and viruses, and modify the subsequent adaptive immune environment. Consequently, they play a wide range of roles in both innate and adaptive immune responses. These peptides are of increasing importance due to their broad-spectrum antimicrobial activity and their functions as mediators linking innate and adaptive immune responses. This review focuses on the pleiotropic biological functions and related mechanisms of action of human host defense peptides and discusses their potential clinical applications.

• Phonetics and Speech Sciences
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• v.15 no.2
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• pp.13-20
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• 2023

This study explores the potential of automated speech recognition (ASR) in assessing English learners' pronunciation. We employed ASR technology, acknowledged for its impartiality and consistent results, to analyze speech audio files, including synthesized speech, both native-like English and Korean-accented English, and speech recordings from a native English speaker. Through this analysis, we establish baseline values for the word error rate (WER). These were then compared with those obtained for human raters in perception experiments that assessed the speech productions of 30 first-year college students before and after taking a pronunciation course. Our sub-group analyses revealed positive training effects for Whisper, an ASR tool, and human raters, and identified distinct human rater strategies in different assessment aspects, such as proficiency, intelligibility, accuracy, and comprehensibility, that were not observed in ASR. Despite such challenges as recognizing accented speech traits, our findings suggest that digital tools such as ASR can streamline the pronunciation assessment process. With ongoing advancements in ASR technology, its potential as not only an assessment aid but also a self-directed learning tool for pronunciation feedback merits further exploration.

• Educational Technology International
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• v.20 no.1
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• pp.83-107
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• 2019

The aim of this study is to provide the values and descriptive implications of the Design Thinking (DT) method into the context of educational problems of practice in an undergraduate course. To achieve the research objective, both quantitative and qualitative studies were conducted. For the qualitative study, the student's productions and reflections on the experience of the application of the DT into educational problems were analyzed. For the quantitative research, one-group pre and post-test were designed to validate the effectiveness of the DT method into educational contexts in terms of creativity level to measure the student's Creativity Potential and Practiced Creativity, Academic Self-Efficacy Scale, and Problem-Solving Inventory. This study validated that the DT method had a statistically significant influence on those three competencies and also illustrated the detailed process from a qualitative viewpoint. The results and implications reflect the potential of the DT approach with the educational problem of practice, especially, in the ill-structured problem-solving contexts for student-centered instructional setting.

• Korean Journal of Comparative Education
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• v.28 no.3
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• pp.243-263
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• 2018

In order to confirm the academic authenticity of comparative education, the academic methodology which is also appropriate for the historical arrangement is the history. In this sense, this article focuses on the study of comparative education from the viewpoint of history of education and aims for a tentative approach to comparative education history. In every discipline, it is essential to organize the history of the discipline both for those majoring in it and for the development of the discipline itself. The conclusions obtained from this study are as follows. First, in general, the method of studying comparative education includes not only 'comparative studies' but also 'regional studies', but it can add academic depth through the study of time series called 'comparative education history'. Second, the developmental process of the comparative education can be classified into four stages; the first stage is 'the pre-history' of the comparative education, the second stage is the 'embryo stage', the third stage is the 'establishment stage', and the fourth stage is the 'development stage'. Especially, in the era of globalization, the academic potential of comparative education is even higher, so it is possible to add an 'expanding period'. Third, it is necessary to understand the 'comparative education history' in order to secure the academic identity of the comparative education study. It is expected that it will be possible to more easily confirm the perspectives and issues of comparative education in the future, together with a good conceptual understanding of comparative education.

• Journal of The Korean Association of Information Education
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• v.16 no.4
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• pp.439-450
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• 2012

This paper explores effectiveness of integrating Problem-Based Learning with Web 2.0 technologies in Computer subject matter education for improving quality of lessons and adapting of social needs for pre-service teachers. Students have studied about computer subject matter for 4 times. The process of leaning have recorded by Web 2.0 tools that is one of the cloud services. Also the students have written reflection journals about experiences of PBL process and results. The PBL process and reflection journals have been analyzed by qualitative data analysis. Conclusions are drawn as to potential for the use of Web 2.0 tools for PBL in computer subject matter. The results of the analyses showed the following: 1) Increasing the understanding of the computer subject matter education, 2) enhancing students' competence in using ICT potentially, 3) cultivating teaching and learning strategies on Web 2.0 environment and 4) enhancing competence of future teaching activities through experiencing e-portfolio as a performance-assessment tool.

• Journal of Elementary Mathematics Education in Korea
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• v.1 no.1
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• pp.109-121
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• 1997

A lot of educators claim that the open education should be performed in elementary classroom, but it is true that they do not suggest the specific direction of practicing open education in case of mathematics subject. Although a project lesson is recommended, there is little case that suggests the direction of practice and the evaluation method of project lesson. Therefore this study searchs for the possibility of practicing open education in elementary mathematics classroom by reviewing the portfolio assessment and suggesting the specific case of applying the portfolio assessment to project lesson. A portfolio is a folder in which is recording solution process, student's self reflection, and teacher's comment, about topics and problems more than one. Students can see their own varying aspects and recognize their own merits and demerits, sincerities, and potentialities by portfolio assessment. Futheremore, teacher can both grasp the student's cognitive situation and give them the professional advice about the cognitive development. That is, they can perform the instruction underlining the learner's ability and personality, by identifying what Vygotsky calls 'the proximal zone of development' through portfolio assessment. Consequently, portfolio assessment is an alternative evaluation method for integrating process and product of learning, and can be used as an important tool for developing the learner's potential possibility of self-realization.

• Journal of The Korean Association of Information Education
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• v.14 no.2
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• pp.139-148
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• 2010

This study aimed to develop the teacher training programs to prevent and treat of game addiction. First, we analyzed the existing training programs concerning game addiction and searched for various strategies applicable to game addiction prevention and treatment education programs. On this ground, training programs were divided into three courses that were the prevention program for normal students, the treatment program I for students in the potential-risk group, and the treatment program II for those in the high-risk group. For the prevention program, commonalities were drawn and developed from the existing studies and training programs; and for treatment programs, game addiction clinic centers were analyzed to draw various useful strategies and contents. We also developed the details of those programs in consultation with experts. As a result of content validity about the developed teacher training program to prevent and treat of game addiction, this program was generally appropriate and acceptable. We expect that the developed programs help to treat a student who has game addiction effectively.

• Journal of Korea Game Society
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• v.10 no.5
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• pp.25-38
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• 2010

This study examines the possibility of applying ORPG to narrative education in schools. At first, in terms of applying games to education, the choice of the appropriate games for various subjects and lessons seems to be limited. Also there is not much active research being done in the classroom promoting students to create their own games. As a substitute, this article suggests ORPG, known as 'a play of thinking', could possibly be applied to narrative education. In ORPG, gamer's thoughts are defined as 'a thinking of being conscious of hallucinations(幻)' and 'a thinking of a 彈指神功'. The students are encouraged to create 'scenarios of ORPG' and directly experience them by participating as gamer. Focusing on these two class circumstances, the practical effects of applying ORPG to narrative educational field was reviewed and, additionally the students' feedback was surveyed. As a result, two meaningful educational effects were drawn out which may show the positive potential of ORPG being used in narrative education.

• Journal of Microbiology and Biotechnology
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• v.28 no.3
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• pp.432-438
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• 2018

Microalgae hold promise as a renewable energy source for the production of biofuel, as they can convert light energy into chemical energy through photosynthesis. However, cost-efficient harvest of microalgae remains a major challenge to commercial-scale algal biofuel production. We first investigated the potential of electrolytic water as a flocculant for harvesting Tetraselmis sp. Alkaline electrolyzed water (AEW) is produced at the cathode through water electrolysis. It contains mineral ions such as $Na^+$, $K^+$, $Ca^{2+}$, and $Mg^{2+}$ that can act as flocculants. The flocculation activity with AEW was evaluated via culture density, AEW concentration, medium pH, settling time, and ionic strength analyses. The flocculation efficiency was 88.7% at 20% AEW (pH 8, 10 min) with a biomass concentration of 2 g/l. The initial biomass concentration and medium pH had significant influences on the flocculation activity of AEW. A viability test of flocculated microalgal cells was conducted using Evans blue stain, and the cells appeared intact. Furthermore, the growth rate of Tetraselmis sp. in recycled flocculation medium was similar to the growth rate in fresh F/2 medium. Our results suggested that AEW flocculation could be a very useful and affordable methodology for fresh biomass harvesting with environmentally friendly easy operation in part of the algal biofuel production process.

• Journal of The Korean Association of Information Education
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• v.14 no.4
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• pp.589-603
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• 2010

Game addiction is the one of side effects from current knowledge-based society, So it is very important to find students with game addiction and treat them as early as possible. In this paper, first of all, a measure scale is developed for diagnosing game addiction. The scale is made based on the literature reviews. Also, a game model is developed based on virtues education. The proposed model has the following characteristics. First, it can induce active participation of students. Second, it helps students find and decide a moral standard related to online game addiction for themselves. Third, students can learn a moral standard naturally through narratives related to various real-life situations. The followings are concluded after applying the proposed game to elementary school students with game addiction. First, game addiction is relieved for those students, specially for "high risk" and "potential" groups. Second, the proposed game can improve respect to others and individual responsibility.