• The Mathematical Education
• /
• v.55 no.3
• /
• pp.299-316
• /
• 2016

The abilities for 21st learners have recently changed and learners' engagement is emphasized. In flipped classroom, students learn the prerequisite concepts of the lecture online in advance and perform various types of activities based on interaction and engagement. As students in flipped classroom construct knowledge actively, students' engagement is very important. Therefore, I conducted a research of flipped mathematics class to help teachers to better understand students' engagement in flipped mathematics class. The flipped mathematics class was conducted for about 3 weeks with 29 middle school students and one teacher. Video and audio recordings, completed student worksheets and interview data were collected and analyzed using the qualitative method. The results of this study showed that students' engagement is influenced by diverse factors. Engagement factors were categorized by teacher factors, community factors, material factors, tasks and strategy factors, classroom culture factors. Each factor facilitates or suppresses behavioral, emotional, cognitive, agentic engagements, and sometimes several factors are related. The results of this study increase understanding of engagement through the example of a case study on flipped mathematics class.

• Journal of Engineering Education Research
• /
• v.25 no.1
• /
• pp.12-21
• /
• 2022

The College of engineering's capstone design is student-team-centred learning based on project-based learning and is one of the most important courses for students aiming to be competent professional engineers capable of solving real industrial problems. Therefore, in order to resolve the capstone problems, various face-to-face contacts such as frequent industrial site visits, multiple meetings with diverse people including team members, and repeated contacts with course-supervising and team-advising professors are prerequisite processes. However, according to the transition to fully online education due to the global pandemic of COVID-19, capstone design courses for 2020 and 2021 were also conducted online. Based on the modified students' evaluations of educational quality (SEEQ) with 3 perspectives such as curriculum, teaching-staff and students themselves, this study compares their evaluations of offline capstone designs from 2013 to 2019 and online capstone designs in 2020 and 2021 in the context of COVID-19. In 3 perspectives, the difference in students' evaluation of the online capstone between the beginning and the end of the course shows a positive effect, which is better than the offline capstone. Also, in various dimensions for each perspective, the online capstone shows a better evaluation than the offline capstone. These findings suggest that the online capstone design curriculum can be expected to have educational effects as well as students' satisfaction with the online curriculum in the future.

• Structural Monitoring and Maintenance
• /
• v.10 no.1
• /
• pp.43-62
• /
• 2023

Damage monitoring is a prerequisite step to ensure the safety and performance of concrete structures. Smart aggregate (SA) technique has been proven for its advantage to detect early-stage internal cracks in concrete. In this study, a 1-D CNN-based method is developed for autonomously classifying the damage feature in a concrete anchorage zone using the raw impedance signatures of the embedded SA sensor. Firstly, an overview of the developed method is presented. The fundamental theory of the SA technique is outlined. Also, a 1-D CNN classification model using the impedance signals is constructed. Secondly, the experiment on the SA-embedded concrete anchorage zone is carried out, and the impedance signals of the SA sensor are recorded under different applied force levels. Finally, the feasibility of the developed 1-D CNN model is examined to classify concrete damage features via noise-contaminated signals. The results show that the developed method can accurately classify the damaged features in the concrete anchorage zone.

• The Mathematical Education
• /
• v.57 no.2
• /
• pp.93-110
• /
• 2018

One of the biggest changes in the 2015 revised mathematics curriculum is shifting to the second year of middle school in Pythagorean theorem. In this study, the following subjects were studied. First, Pythagoras theorem analyzed the expected problems caused by the shift to the second year middle school. Secondly, we have researched the reconstruction method to solve these problems. The results of this study are as follows. First, there are many different ways to deal with Pythagorean theorem in many countries around the world. In most countries, it was dealt with in 7th grade, but Japan was dealing with 9th grade, and the United States was dealing with 7th, 8th and 9th grade. Second, we derived meaningful implications for the curriculum of Korea from various cases of various countries. The first implication is that the Pythagorean theorem is a content element that can be learned anywhere in the 7th, 8th, and 9th grade. Second, there is one prerequisite before learning Pythagorean theorem, which is learning about the square root. Third, the square roots must be learned before learning Pythagorean theorem. Optimal positions are to be placed in the eighth grade 'rational and cyclic minority' unit. Third, Pythagorean theorem itself is important, but its use is more important. The achievement criteria for the use of Pythagorean theorem should not be erased. In the 9th grade 'Numbers and Calculations' unit, after learning arithmetic calculations including square roots, we propose to reconstruct the square root and the utilization subfields of Pythagorean theorem.

• Journal of Biomedical Engineering Research
• /
• v.44 no.5
• /
• pp.346-353
• /
• 2023

In this paper, we propose an innovative approach that leverages deep learning to find optimal reference points for achieving precise tooth segmentation in three-dimensional tooth point cloud data. A dataset consisting of 350 aligned maxillary and mandibular cloud data was used as input, and both end coordinates of individual teeth were used as correct answers. A two-dimensional image was created by projecting the rendered point cloud data along the Z-axis, where an image of individual teeth was created using an object detection algorithm. The proposed algorithm is designed by adding various modules to the Unet model that allow effective learning of a narrow range, and detects both end points of the tooth using the generated tooth image. In the evaluation using DSC, Euclid distance, and MAE as indicators, we achieved superior performance compared to other Unet-based models. In future research, we will develop an algorithm to find the reference point of the point cloud by back-projecting the reference point detected in the image in three dimensions, and based on this, we will develop an algorithm to divide the teeth individually in the point cloud through image processing techniques.

• Journal of The Korean Association For Science Education
• /
• v.12 no.3
• /
• pp.77-89
• /
• 1992

According to many previous researches on the students' physics conceptions, in spite of school science learning the students' preconceptions were either not changed or reinforced. Although many researchers argued that the presentation of conflict situations which can not be explained by the students' preconceptions is prerequisite to their conceptual changes, some other researchers argued that such a presentation could be useless. In this study, a model of students' conceptual change in physics, which encourages students to recognize actively the conflicting situations and to control the process of their conceptual changes, was developed. In this model, the critical discussion on rival concepts and the reflective thinking were regarded as two important factors for students' conceptual changes.

• Management & Information Systems Review
• /
• v.3
• /
• pp.317-352
• /
• 1999

The results of a discussion among parties involved in the Industrial Educational Cooperation Program are as follows: 1. Ensure that students in the Continuing Education System have certain work experience as a prerequisite for admission. 2. Studies and evaluation methods should be diversified in order to give students better selection of lectures and credits. 3. Re-education system should be established, and a degree conferred through development of human resources and study terms. 4. Educate students by cooperating between the union of industries and that of the colleges. 5. Students are satisfied about the intensive study by $\ulcorner$2+2$\lrcorner$ joint education which connects junior college and university. 6. Put into practice creative technical education for technological development by learning their classroom studying just as actual practice in the industrial field. I offer strategies for settlement of the Industrial Trust Education mentioned above, and urge the Ministry of Education to comply.

• Journal of Fisheries and Marine Sciences Education
• /
• v.26 no.3
• /
• pp.656-666
• /
• 2014

The purpose of this study is to investigate early childhood teachers' difficulties in creativity education. The subjects of this study were 10 early childhood teachers. Data were collected from reflective journals and in depth interviews. The results were as follows: First, the difficulties fall into two categories; inter and outer difficulties. Second, inter difficulties were teachers' misunderstanding of creativity. Third, outer difficulties were parent's demand for prerequisite learning, kindergarten director's goals of education, insufficient pre-service teacher education, and a lack of support to teachers.

• Journal of Sensor Science and Technology
• /
• v.14 no.2
• /
• pp.109-115
• /
• 2005

Calibration is a prerequisite procedure for employing a camera as a 3D sensor in an automated machines like robots. As accurate sensing is possible only when the vision sensor is calibrated accurately, many different approaches and models have been proposed for increasing calibration accuracy. Particularly an important factor which greatly affects the calibration accuracy is the nonlinearity in the mapping between 3D world and corresponding 2D image. In this paper GMDH algorithm is used to learn the nonlinearity without physical modelling. The technique proposed can be effective in various situations where the levels of noises and characteristics of nonlinear distortion are different. In simulations and an experiment, the proposed technique showed good and reliable results.

• International Journal of Computer Science & Network Security
• /
• v.22 no.3
• /
• pp.101-106
• /
• 2022

The Saudi Arabian Special Education Regulations define the role and requirements from teaching assistants within the educational process. Although all public special education programs are subject to such regulations, their implementation in practice sometimes appears contradictory. Therefore, special educators frequently encounter a range of problems when they fail to comply with such regulations. This article discusses how teaching assistants influence the teaching practices delivered to students with disabilities in special education settings. A qualitative case study approach was conducted using 22 semi-structured interviews. The results suggest a need to focus on the role of the teaching assistant in special education classes to ensure exposure to effective learning practices for students with disabilities. Based on these findings, a number of important implications for future practice, in terms adopting appropriate provisions are suggested.