• 대한공업교육학회지
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• v.31 no.1
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• pp.129-145
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• 2006

The purpose of this study was to develop and apply the project-based learning strategy in blended learning environment to raise and enhance scientific thinking skill, creativity, and problem solving skills to students who would be teachers of an elementary school in the future. This study was conducted as an action research based on an educational university. The study included 25 participants in a class. Data were collected through observation, surveys, interview and students' artifacts. Results indicated the project-based learning strategy in blended learning environment allowed students to raise problem solving skill, critical thinking skill, and creativity. Finally implications of this study, obstacles to conduct this study, and recommendations to implement this strategy more effectively and efficiently were presented.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.876-879
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• 2003

공무원 교육훈련의 새로운 형태인 e-teaming과 blended learning이라고 부르는 통합교육에 대한 국내사례와 국외사례를 검토하고, 다양한 통합교육 형태의 모델을 제시하고, 영향요인등을 분석하여 효율적인 운영전략 방안을 모색해보고자 한다.

• Journal of Animal Science and Technology
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• v.52 no.2
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• pp.125-130
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• 2010

This study was conducted to investigate the effects of blended feeding essential oils on meat quality improvement for branded pork. A total of one-hundred pigs ($66.24\;{\pm}\;0.83\;kg$, average initial BW) were used for 10 weeks study. Dietary treatments included: 1) CON (basal diet), 2) NBE (basal diet + 75 ppm of blended essential oil), 3) NBA (basal diet + 0.3% Benzoic acid) and 4) BEB [basal diet + 75 ppm of blended essential oil (with 0.3% Benzoic acid)]. The marbling value was improved in NBE treatment compared to NC and PC treatments (P<0.05). Hardness was higher in NBA treatment than NC and PC treatments (P<0.05). The pH value was higher in BEB treatment than PC and NBE treatments (P<0.05). In fatty acid content of lean, total UFA/SFA was higher in NBA treatment than BEB treatment (P<0.05). In conclusion, the results of this study indicated that dietary supplementation with blended essential oils improve fatty acid content of meat.

• Journal of Creative Information Culture
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• v.5 no.1
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• pp.1-13
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• 2019

This study investigated how general blended learning strategies and flipped-learning instructional strategy affect college students' social presence and group cohesion. The main results of this study were summarized as follows. First, the group of flipped-learning instructional strategy was more effective in college students' social presence than general blended learning. Second, it was found that groups using flipped-learning instruction strategy had more positive effects on improving group cohesion among college students than those using the general blended learning instructional strategy. The results of this study can influence the identification and verification of the main components to be considered when using flipped-learning instruction strategy in blended learning environment. The results of this study can influence the identification and verification of the main components to be considered when using flipped-learning instruction strategy in blended learning environment.

• Korean Journal of Food Science and Technology
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• v.23 no.5
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• pp.568-571
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• 1991

This study was designed to select the most stable oil among vegetable oils for mayonnaise preparation on lipid oxidation when blended with perilla oil. Oxidative stabilities of perilla oil, soybean oil, rapeseed oil, corn oil, sunflower oil and perilla blended oils (blended perilla oil with other vegetable oil in a equal weight rate) were tested. Among the perilla blended oils, perilla blended soybean oil was the most effective on oxidative stability. This may be concerned with the fact that the content of natural antioxidant, tocopherol, is higher than that of other oils. Mayonnaise was prepared by using both perilla oil and perilla blended soybean oil. Variations of POV and tocopherol content of mayonnaise during storage at $37^{\circ}C$ were compared. The changes in POV and tocopherol content in the mayonnaise of perilla blended soybean oil were less than those of perilla oil. This result suggested that the usage of perilla blended soybean oil instead of perilla oil itself is possible in the manufacturing of mayonnaise.

• Journal of East-West Nursing Research
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• v.16 no.2
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• pp.96-104
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• 2010

Purpose: This research is a case study on a problem-based learning (PBL) model with blended learning in a nursing college. Methods: The target students were nursing sophomores in a nursing college who agreed to participate in a blended learning course and to be subjects in this study for 15 weeks. The questionnaires developed by Baek (2003) and Lee (2007) were modified and applied to collect data. Results: The students' satisfaction with the blending learning was the highest in the item "Online community activities were helpful in enhancing knowledge." The level of satisfaction with PBL was the highest in the item "It was helpful to listen my classmates' opinions rather than thinking all by myself." Conclusion: This study is suggestive that blended learning is effective to improve learning satisfaction by reinforcing practicality of face-to-face study to online learning. Various learning methods based on students' demands and preferences should be applied in nursing education.

• Proceedings of the Korea Concrete Institute Conference
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• 2002.10a
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• pp.227-232
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• 2002

To evaluate the practical application of oyster shells as construction materials, an experimental study was performed. More specifically, the long-term mechanical properties and durability of concrete blended with oyster shells were investigated. Test results indicate that long-term strength of concrete blended with 10% oyster shells is almost identical to that of normal concrete. However, the long-term strength of concrete blended with 20% oyster shells Is appreciably lower than that of normal concrete. 1'hereby, concrete with higher oyster shell has the possibility giving a bad influence on the concrete long-term strength. Elastic modulus of concrete blended with crushed oyster shells decreases as the blending mixture ratio increases. Namely, the modulus is reduced by approximately 10∼15% when oyster shells are blended up to 20% replacing the fine aggregate. The drying shrinkage strain increases as the blending ratio increases. In addition, the existing model code of drying shrinkage does not coincide with the test results of this study. An adequate prediction equation needs to be developed. The utilization of oyster shells as the fine aggregate in concrete has an insignificant effect on freezing and thawing resistance, carbonation and sulfuric acid attack of concrete recycling. However, water permeability is considerably improved.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.23 no.4
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• pp.430-439
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• 2016

Purpose: The purpose of this study was to contribute to the development of an efficient teaching-learning method by analyzing effects of writing reflective journals on meta-cognition and problem solving ability in nursing students in education applying blended learning for fundamental nursing skills. Methods: The research design was a one-group pretest-posttest design, done to assess changes in meta-cognition and problem solving ability. Participants were 63 nursing students taking the fundamental nursing skills course at one college in Gyeonggi Province. The course was offered from March 21 to June 3, 2016. Data were collected using pre and post tests given before and after writing of reflective journals in blended learning. Data were analyzed using t-test, ANOVA, $Scheff{\acute{e}}^{\prime}s$ test and paired t-test with SPSS Statistics version 20.0. Results: The results of this study show that scores for meta-cognition and problem solving ability of these students were all above average. There was a statistically significant difference in meta-cognition between pre and post writing of reflective journals but not for problem-solving ability. Conclusion: The findings indicate that writing a reflective journal in blended learning is an efficient teaching-learning method to improve meta-cognition in nursing students.

• Journal of Technologic Dentistry
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• v.42 no.3
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• pp.248-253
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• 2020

Purpose: This study aimed to verify whether blended learning is worth alternating with traditional face-to-face learning for some dental technology students in practice teaching. Methods: A total of 68 students were included in this study. They were divided into two groups to compare blended learning and traditional face-to-face learning. The experiment had been carried out over 15 weeks. The following tests were performed: test of instructional quality, test of learning satisfaction, test of perceived usefulness, and test of learning flow. The IBM SPSS software was used to analyze the data. Results: The learning satisfaction and the perceived useful of blended learning by students appeared to be higher than that of traditional face-to-face learning. However, there was no significant difference in the variables of traditional face-to-face learning and those of blended learning (p<0.05). Conclusion: Blended learning is an alternative to traditional face-to-face learning for some dental technology students in practice teaching.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3383-3388
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• 2014

An experimental study was performed to compare the characteristics of the combustion pressure and exhaust emissions in the case of using pure diesel when the EGR rate was changed in a CRDI 4-cylinder diesel engine with those using biodiesel blended and pure diesel fuel. In this study, the EGR rate variation were conducted at an engine speed of 2000rpm with fuel with a biodiesel blended rate of 20%. The combustion pressure of the biodiesel blended rate 20% and pure diesel fuels decreased with increasing EGR rate. The IMEP of biodiesel was higher than that of ULSD (Ultra low sulfur diesel). The emission results showed that the NOx emission of biodiesel blended fuel with increasing EGR rate was higher than that of ULSD. In addition, the NOx emission of biodiesel blended and diesel fuel decreased with increasing EGR rate. The CO and soot, $CO_2$ emissions increased with increasing EGR rate, and the CO and soot emissions from the biodiesel blended fuel were lower than that of ULSD but the $CO_2$ emissions were higher.