• The Journal of the Korea institute of electronic communication sciences
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• 제13권5호
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• pp.1101-1108
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• 2018

This study is a study of the school zone safety system of the platform part in which processing between device and the application, gateway function processing, and application and service function are cooperatively processed. The device part is the beacons that are supported when the student moves in the school zone. And the section of application is a service announcement that applies to smartphones. Finally, the children's protection area sign shows the number of students registered at the gateway. Gateways operate in two types. The first type is a gateway installed to identify the movement of elementary school students. The second type is a gateway to identify students who have passed through the front door of the school. The IoT platform handles various service functions, child protection area panel support and student counter processing functions.

• The Journal of Korean Association of Computer Education
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• 제9권3호
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• pp.97-107
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• 2006

The deviant behaviors on cyberspace in Korea are increased recently because of the unbalanced development between the social ethics and the technological improvement on information and communication technology. To overcome this, educations on information and communication ethics are executed in school. However most of the educations is to deliver the knowledge on the disfunction of informationization and rules of netiquette without the analysis of the psychological characteristics on the cyberspace. Therefore, educations on information and communication ethics, in which the changes of social behaviors and value attitude are essential, is ineffective by making the students as passive and enervated users. In this research, we developed a teaching-learning model for cultivating consciousness of information and communication ethics by the establishment of ego identity on cyberspace and then proved the effectiveness by the experiment in school. Students can raise their abilities on active dealing with the given situation and context according to this teaching-learning model.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2018년도 춘계학술대회
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• pp.319-322
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• 2018

Unplugged computing, the teaching and learning method, helps you learn the principles and concepts of computer science, and its advantage is that even elementary school students can easily understand it. Most of the North Korean Defector specialized alternative schools in the country have the purpose of having their students pass the qualification exam and be admitted to college. Therefore, the data, or information courses, are comprised of simple typing practices and basic office program handling. The purpose of the present study is to offer a teaching plan for these North Korean refugee adolescents, and we had assessed the courses in terms of its effectivity through a verification process. As a result, during the stage where we analyzed the answers from surveys, that they considered suggested curriculum for these specialized North Korean refugee alternative school was appropriate and have the potential to increase the student's satisfaction and interest.

• Journal of The Korean Association of Information Education
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• 제8권2호
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• pp.227-238
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• 2004

While the first step of the comprehensive plan for educational informationization focused on the infrastructure establishment, the second step aims to develop creativity and problem solving skills of students through the use of Information and Communication Technology(ICT). The purpose of this research is to investigate the current status of the educational use of ICT in elementary schools, and to give guidelines for future educational informationization. Four aspects of ICT(i.e., school environments, teachers' abilities to use ICT, methods for using ICT in class, and factors hindering the use of ICT in schools) were examined in the survey. From the survey, it is found that ICT is now used in schools more actively than before. However, it is also found that more efforts need to be made in some areas such as instructional strategies using ICT in class, and the design and the management of teacher training programs.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2018년도 추계학술대회
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• pp.137-140
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• 2018

As the number os working-class households has increased and As the number of working-class households has increased and the birth rate has decreased, more than a third of all elementary school students are left alone. While elementary schools across the nation have implemented a policy of after-school care, even that has reduced the number of classrooms in the government. As such, parents cannot avoid leaving their children alone at home and wonder about their day. For these parents and older elementary school students, they came up with a service that allows them to plan and implement their own work. The service enables children to develop self-regulating learning skills and allows them to receive feedback through the app on what plans and practices a child left alone at home is planning.

• The Journal of the Korea institute of electronic communication sciences
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• 제16권4호
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• pp.699-708
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• 2021

In this paper, a steering control and speed control algorithm was presented for autonomous driving based on two vision sensors and road speed sign board. A car speed control algorithm was developed to recognize the speed sign by using TensorFlow, a deep learning program provided by Google to the road speed sign image provided from vision sensor B, and then let the car follows the recognized speed. At the same time, a steering angle control algorithm that detects lanes by analyzing road images transmitted from vision sensor A in real time, calculates steering angles, controls the front axle through PWM control, and allows the vehicle to track the lane. To verify the effectiveness of the proposed algorithm's steering and speed control algorithms, a car's prototype based on the Python language, Raspberry Pi and OpenCV was made. In addition, accuracy could be confirmed by verifying various scenarios related to steering and speed control on the test produced track.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.482-485
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• 2021

In this study, the effect of the workbook-based unplugged activity program on the improvement of computational thinking skills of elementary school students in 3rd and 4th grade was statistically analyzed. The study was conducted with 18 students in the 3rd and 4th grades of G Elementary School located in Chungcheongnam-do, and after conducting a computational thinking ability test in advance, an unplugged program based on the workbook was conducted in a total of 6 sessions with 9 members of the experimental group. After that, a post-mortem examination was conducted to analyze the degree of improvement in computational thinking ability. As a result of the analysis, it was confirmed that the workbook-based unplugged program improved the computational thinking skills of elementary school students in 3rd and 4th grade and had a positive effect.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.486-489
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• 2021

The purpose of this study was to investigate whether block-based programming language, which is currently being used in elementary and secondary schools, attracts students' interest and motivates them to learn. In addition, this study was to investigate how block-based programming language can help students improve their computing thinking ability and have a good effect on learning text-based programming to learn in high school. In addition, this study tried to study the direction of education linked with artificial intelligence and programming, which are popular in the era of the Fourth Industrial Revolution. The interest in software education has increased so much that software and information education from elementary school to high school has achieved quantitative and qualitative growth that can not be compared with before. However, in the field of artificial intelligence, discussions have begun, but we can not say that we have yet established ourselves in our education. We will discuss how block-based programming and text-based programming will be combined with artificial intelligence and educated.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.143-145
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• 2021

The Sihwa River was first planned to be a fresh water lake, but it failed due to serious environment pollution. During times of destruction and regeneration, changes of ecosystem of Sihwa River was visible, especially the algal ecosystem. It's because many seasonal birds pass through the place. This paper analyzes the changes of algal ecosystem of Sihwa River based on eight ecosystem indices. Moreover, using gradient descent, COD is expressed has a function of three ecosystem indices selected from above which is newly defined as SEI, Sihwa Ecosystem Index. In conclusion, we can observe the current ecosystem more easily without its actual data, but only with informations of the ecosystem.

• The Journal of the Korea institute of electronic communication sciences
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• 제18권5호
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• pp.859-866
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• 2023

This paper focuses on configuring a user-friendly system of LED systems by applying improvement measures such as gamma correction, non-flicker, and driving noise removal using MCUs and LED drivers. As a result of the experiment, the 22kHz PWM mode of the LED driver generated noise outside the audible frequency range, making it practically imperceptible to users. The appropriate pull-up resistor values within the normal operating delay ratio of 5% were found to be 1kΩ to 10kΩ for the 3kHz PWM mode and 1kΩ to 2kΩ for the 22kHz PWM mode. In addition, gamma correction can be optimized for nonlinear human visual systems to express accurate contrast and as a result, it is expected to develop an LED system that can be expressed more naturally and accurately than conventional LED systems and improve users' visual experience.