• The Journal of the Acoustical Society of Korea
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• v.30 no.5
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• pp.281-294
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• 2011

Physics-based sound synthesis usually requires high computational costs and this results in a restriction of its use in real-time applications. This motivates us to implement the sound synthesis algorithm of plucked-string instruments using multi-core processor architectures and determine the optimal processing element (PE) configuration for the target instruments. To determine the optimal PE configuration, we evaluate the impacts of a sample-per-processing element (SPE) ratio that is defined as the amount of sample data directly mapped to each PE on system performance and both area and energy efficiencies using architectural and workload simulations. For the acoustic guitar, the highest area and energy efficiencies are achieved at a SPE ratio of 5,513 and 2,756, respectively, for the synthesis of musical sounds sampled at 44.1 kHz. In the case of the classical guitar, the maximum area and energy efficiencies are achieved at a SPE ratio of 22,050 and 5,513, respectively. In addition, the synthetic sounds were very similar to original sounds in their spectra. Furthermore, we conducted MUSHRA subjective listening test with ten subjects including nine graduate students and one professor from the University of Ulsan, and the evaluation of the synthetic sounds was excellent.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.264-275
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• 2017

Objective: This study examines the effects of children's art activities through forest experience in relation with Nuri curriculum on environmental sensitivity. Method: A survey was administered to an experimental group of 20 children as well as a control group of 20 children for statistical analysis. after 16-class art activities through forest experience were performed to children aged 4 at a daycare center for 50 days. Result: Children's art activities through forest experience in relation with Nuri curriculum had a positive effect on their environmental sensitivity. In particular, their art activities had a positive effect on their self-awareness, self-regulation, empathy and motivation in the experimental group, supporting the educational effects and benefits of developmental children's art activities through forest experience in relation with Nuri curriculum. In other words, art activities through forest experience are useful in terms of providing children with creative expression activities in art by leading to observation and exploration, as well as educational experiences that have positive attitudes toward the environment. Conclusion: As children's art activities through forest experience have a positive effect on their environmental sensitivity, more useful information on teaching-learning methods will be able to be provided to early childhood teachers in the field. Consequently, children's art activities through forest experience need to be actively introduced in the field of early childhood education as an alternative for learning nature and improving environment-friendly emotional intelligence.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.9
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• pp.42-49
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• 2018

The purpose of this study is to investigate the effects of team - based simulation training in nursing students on critical thinking and communication clarity. This study was conducted from October 2017 to November 2017 for 69 students (33 experimental group and 36 control group) who took a course of "Basic Nursing Theory and Practice" students in a major nursing student in P city, Gyeongbuk province. Collection and analysis. In this study, we conducted a questionnaire survey using a tool of critical accidents measurement by Yoon Jin(2004) and a communication clarity tool by Hye - jin Jo(2013). Statistical analysis was performed using SPSS 23.0, Chi-square, Fisher's exact test, t-test and ANCOVA. Data analysis showed that the groups participating in the SBAR team based simulation training were significantly more effective than the control group in critical thinking (F = 11.91, p <.001) and communication clarity (F = 4.40, p = .040). Based on these results, it is shown that using SBAR team - based simulation learning for nursing students is effective in teaching 'fundamental nursing and practice' and can be recommended as teaching method for nursing students.

• Journal of Engineering Education Research
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• v.10 no.1
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• pp.60-76
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• 2007

In this study, the effect of a sustainable energy design project on academic achievement for engineering freshmen at Virginia Tech in fall semester 2006 in the United States was examined by experimental method. The department of engineering education at Virginia Tech was opened in 2004. In this experiment the population was approximately 1200 freshmen, and 5 classes were sampled. Subject name is engineering exploration, a theme of the instruction is sustainable energy design, the project was performed throughout a 6 weeks period with one by 50 minutes lecture conducted by faculty and one 90 minutes workshop conducted by GTAs (Graduate Teaching Assistants) every week. The statistical results using SPSS (ver. 15.0) are as follows: A paired-samples t test analysis was run on the pre- and posttest to determine academic achievement, the results indicated a significant increase in 4 classes of mixed gender at .05 significance level, but there was no significance at 1 group of female class. A paired-samples t test analysis was run on the pre- and posttest to get an attitude score, the results showed, the posttest scores decreased for 5 groups even though it was not statistically significant. Finally, in responses to an open-ended question about students' perceptions of their improvement in skills, the 3 most frequently identified skills were teamwork, design process, knowledge.

• Journal of Educational Research in Mathematics
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• v.27 no.2
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• pp.269-289
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• 2017

Statistics education research is an important basis for improving the practice of statistical education by describing, predicting, and explaining the phenomena of statistical education. In this study, the research trends in Korea were analyzed through the statistical education research papers published in major Korean mathematics education journals on the 21st century. 99 papers published in these journals from 2000 to 2016 were categorized by journals, research subjects, research methods, and, topics. As a result, it was shown that there are not many statistics education researchers, so domestic researches are dependent on some researchers. In addition, the numbers of studies of human subjects and human non-subject researches were similar. There were few studies of university students, and the studies of teachers' subjects was gradually increasing since 2010. In the case of research methods, the numbers of experimental and non-experimental studies seem to be similar, but this is a result of the increase in qualitative research and mixed research since 2010. Last, many studies about domestic statistics education are on teaching and learning, and the studies on reasoning and understanding have been increasing. In this study, we see the research trends of domestic statistics education and provide implications for the future researches and development directions of statistical education research.

• The Journal of the Korea Contents Association
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• v.16 no.12
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• pp.35-42
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• 2016

The purpose of this study is to examine the effect of action learning approaches on problem-solving skills and learning agency of nursing undergraduate students. This experimental study is designed for a nonequivalent control group. The program was put into practice 2 times a week for 4 weeks. The number of subjects in this research consists of 105, where 53 of the experimental group participated in action learning program and 52 of the control group didn't do. The data was analyzed by ${\chi}^2$-test, Chi-Square test, t-test and paired t-test. The effects of action learning approaches on learning outcomes in nursing process courses are as follows: The problem solving ability of the experimental group has been more elevated than that of the control group. The experimental group has made increase in self directed learning skills. The action learning approaches on learning outcomes in nursing process courses are convenient in nursing process courses. This study has significance in that it identified the availability of the action learning program and that it would be useful teaching and learning method to achieve learning outcomes.

• Journal of the Korean Chemical Society
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• v.46 no.5
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• pp.456-465
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• 2002

The purpose of this study was to investigate the educational effects of an animation materials developed with the macroscopic particle moving sight. The 11 animations developed by the researchers showed the movements of molecules, ions, and electrons. The materials were developed for teachers to use when they taught "electrochemical cell' unit. The subjects were 151 students of 9th grade who were divided into the experimental and control group and were taught during 16 hours. In order to figure out the characteristics of each student before the instructions, a short-version GALT(Group Assessment of Logical Thinking) and the pretest of conceptions were carried out. After the instructions, students tested 3 types of exam; the posttest of conceptions, attitude test connected with science, cognition test. After 4 months later, students tested the posttest of conceptions agin for long-term memory effect. It was found that the exper-imental group using the developed animation materials had significantly higher scores of conceptual understanding than control group. The experimental group had also significantly higher scores of the long-term memory test and attitude test than control group. The results mean that animation materials which shows the macroscopic particle movement help stu-dents to understand scientific concepts and to elevate interests.

• Journal of the Korea Convergence Society
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• v.9 no.2
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• pp.217-227
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• 2018

The objective of this study is to analyze the effects of music lesson applying the blended learning-based STEAM education on the musical knowledge and STEAM literacy of pre-service kindergarten teachers. After conducting a pre-test on the musical knowledge and STEAM literacy targeting 20 students(3rd year) of early childhood music lesson in Dept. of Early Childhood Education of C University in O Metropolitan City and 19 students(3rd year) of early childhood music lesson in Dept. of Early Childhood Education of D University in B Metropolitan City, the effectiveness of the pre - post test design was verified. In the results of study, the experimental group with music lesson applying the blended learning-based STEAM education showed significantly improved results in all the areas of musical knowledge and convergence, creativity, and communication out of STEAM literacy than the control group with general music lesson. Such results of this study imply that music lesson applying the blended learning-based STEAM education could be usefully used as a teaching/learning method to improve musical knowledge and STEAM literacy of pre-service kindergarten teachers in university education site in the future.

• Journal of Science Education
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• v.44 no.2
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• pp.205-213
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• 2020

The purpose of this study is to investigate the effects of elementary school students' knowledge and information processing competence and collaborative problem-solving ability in scientific inquiry class using data measured with digital inquiry tools. To this end, three classes of 5th grade elementary schools in S-city, Gyeongnam were selected as experimental groups and three classes as control groups. The control group conducted traditional lecture-style classes, and the experimental group conducted scientific inquiry classes using scientific data. The following results were obtained through questionnaires after class. First, science inquiry classes using scientific data helped elementary school students improve their knowledge and information processing competence. Second, scientific inquiry classes using scientific data improved elementary school students' cooperative problem-solving ability. From the above results, it was found that scientific inquiry classes using scientific data are needed to improve the knowledge information processing competence and cooperative problem solving ability of elementary school students. Based on this research, it is necessary to study a specific teaching and learning environment that can activate scientific inquiry class using data measured with digital inquiry tools in the future.

• Journal of KIISE:Software and Applications
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• v.30 no.11
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• pp.1080-1091
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• 2003

Recently, the distance education has been rapidly proliferated with the rapid growth of the Internet and high speed networks. There has been relatively much research with regard to online lecture (teaching and studying) tools for the distance education, compared to the virtual laboratory tools (for self-study and experiments). In this paper, we design and implement a web-based simulation tool, named as SimDraw, for the virtual laboratory in the distance education. To apply the web-based simulation technology into the distance education, some requirements should be met; firstly, the user interface of the simulation should be very easy for students. Secondly, the simulation should be very portable to be run on various computer systems of remote students. Finally, the simulation program on remote computers should be very thin so that students can easily install the program onto their computers. To meet these requirements, SimDraw adopts the client/server architecture; the client program contains only model development and animation functions so that no installation of a client program onto student's system is required, and it can be implemented by a Java applet in Web browsers. The server program supports client programs by offering the functions such as remote compiling, model storing, library management, and user management. For the evaluation of SimDraw, we show the simulation process using the example experimentation of the RIP(Routing Information Protocol) Internet routing protocol.