• The Journal of Korean Association of Computer Education
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• v.18 no.2
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• pp.1-9
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• 2015

Excessive cognitive burdens caused by learning grammar should be reduced to cultivate high-level thinking skills in students through programing education. To this end, various educational programing languages have been developed. In recent years, block-based App Inventor that can used in real life have been introduced. This study intends to suggest an educational environment in which programing can be utilized as a leading problem solving tool by designing and producing an app that can be easily used by students in their real life. In particular, given the developmental phase of elementary school students, specific operational activities are important. For this reason, an App Inventor that can be proposed to enable dynamic interactions with the real world based on various smartphone sensors during the process of programing has significance as an educational programing language for elementary school students. In this regard, this study designed App Inventor programing education for elementary school students, which can be used in their daily life. The results of applying the education in fifth graders showed its positive effects on learning programing. LT collaborative learning where the students cooperated with each other, the theme of learning, which enables the utilization of various smartphone sensors in real life, and the app inventor may have generated and sustained the students' interest and attention.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.7 no.12
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• pp.819-829
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• 2017

In this paper, we describe the current state of speech recognition technology and identify the basic speech recognition technology and algorithms first, and then explain the code flow of API necessary for speech recognition technology. We use the application programming interface (API) of Google, Naver, and Daum KaKao, which have the most famous search engine among the speech recognition APIs, to create a voice recognition app in the Android studio tool. Then, we perform a speech recognition experiment on people's standard words and dialects according to gender, age, and region, and then organize the recognition rates into a table. Experiments were conducted on the Gyeongsang-do, Chungcheong-do, and Jeolla-do provinces where the degree of tongues was severe. And Comparative experiments were also conducted on standardized dialects. Based on the resultant sentences, the accuracy of the sentence is checked based on spacing of words, final consonant, postposition, and words and the number of each error is represented by a number. As a result, we aim to introduce the advantages of each API according to the speech recognition rate, and to establish a basic framework for the most efficient use.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.05a
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• pp.533-536
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• 2016

In this paper, we take advantage of the SEN Remote HMI App as a tool based on Raspberry Pi server for the smart home control. This is a smart home control system built in an open and a low-cost Raspberry Pi as a server, and take advantage of Android-based graphical programming software SEN Remote HMI. If you build it based system expansion and additional works interface via the Raspberry Pi and Arduino, it is expected to be extended to the Internet of Things (IoT) enabling environment for the implementation of smart home.

• Journal of Digital Convergence
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• v.19 no.6
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• pp.11-21
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• 2021

The aim of this study is to examine the effectiveness of learning by running an extracurricular program to make effective learning of unfamiliar and difficult programming education possible for students in the humanities. Analysis of learning-related data for one semester of lectures that were collected from 70 humanities students in departments A and B, data collected from a creative convergence app development contest extracurricular program, and data obtained through a questionnaire show that extracurricular program activities affect academic performance. The results of the core competency diagnosis test for students that was conducted before and after participating in the curriculum showed that core competencies improved for both A and B departments after participating in the curriculum. This study shows that extracurricular program activities can help individuals improve their abilities, while also providing customized guidance to reclusive students to improve their academic performance. By carrying out customized coaching for each department to develop apps related to the major field rather than general apps, we hope for improvements in ability to solve problems by converging with the major field, computational thinking, and creative thinking, in the future.

• Journal of the Korea Society of Computer and Information
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• v.28 no.3
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• pp.189-196
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• 2023

This paper analyzes the level of satisfaction of two groups of teachers who were educated about artificial intelligence using App Inventor. The participants were 13 pre-service and 9 in-service elementary school teachers and the data was collected using a questionnaire. As a result of the study, in-service teachers were all more satisfied than pre-service teachers in terms of interest, difficulty, and participation in the education. In addition, the questions investigating whether education helped motivate learning of artificial intelligence and whether there is a willingness to apply it to elementary classes in the future were also more positive for in-service teachers than for pre-service teachers. In general, pre-service teachers had somewhat more negative views than in-service teachers, but they were more positive than in-service teachers in terms of whether the education helped improve their understanding of artificial intelligence and whether they were willing to participate in additional education. Analysis of the Mann-Whitney test to see if there was a significant difference in satisfaction between the two groups showed no significance. This may be because most of the students in the two groups already had block-type or text-type programming experience, so they were able to participate in the education without any special resistance or difficulty with App Inventor, resulting in high levels of satisfaction from both groups. The results of this study can provide basic data for the future development and operation of programs for artificial intelligence education for both pre-service and in-service elementary school teachers.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.56 no.10
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• pp.1721-1730
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• 2007

SThis paper proposes a new dispatch scheduling algorithm in interconnected regional system operations. The dispatch scheduling formulated as mixed integer non-linear programming (MINLP) problem can efficiently be computed by generalized Benders decomposition (GBD) algorithm. GBD guarantees adequate computation speed and solution convergency since it decomposes a primal problem into a master problem and subproblems for simplicity. In addition, the inter-temporal optimal power flow (OPF) subproblem of the dispatch scheduling problem is comprised of various variables and constraints considering time-continuity and it makes the inter-temporal OPF complex due to increased dimensions of the optimization problem. In this paper, regional decomposition technique based on auxiliary problem principle (APP) algorithm is introduced to obtain efficient inter-temporal OPF solution through the parallel implementation. In addition, it can find the most economic dispatch schedule incorporating power transaction without private information open. Therefore, it can be expanded as an efficient dispatch scheduling model for interconnected system operation.

• 한국벤처창업학회:학술대회논문집
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• 2016.04a
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• pp.235-238
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• 2016

디지털 콘텐츠의 한 형태로 볼 수 있는 앱은 개발자들의 창의적 사고를 바탕으로 현재도 무수히 쏟아져 나오고 있으며, 많은 사용자로부터 선택되어 활용되고 있다. 이러한 변화는 교육분야에도 영향을 주어 앱을 활용한 교육환경과 교육방법에 대한 다양한 연구가 현재 진행되고 있다. 앱과 같은 디지털 콘텐츠의 개발은 창의적 아이디어를 기반으로 구현되며 이는 콘텐츠 사용자의 유용성과 경제적 가치를 결정하는데 중요한 요소로 작용하고 있다. 이러한 창의와 디지털 기술을 접목한 앱 프로그래밍 교육은 학생들의 창의적 사고와 문제해결력을 향상시키는데 중요한 역할을 하며 특히 교육용 프로그래밍 언어(EPL, Educational Programming Language)를 활용한 코딩 교육과 창의적 문제해결력 향상에 관한 관련 연구들이 활성화되고 있는 실정이다. 본 연구에서는 이러한 EPL을 바탕으로 비IT계열 전공의 대학생들에게 프로그래밍 교육을 실시하고 창의적 사고를 통해 디지털 콘텐츠인 앱을 제작하는 것에 초점을 두기 위한 안드로이드 앱제작 교육 프로그램 개발을 진행하였다. EPL을 위한 도구는 MIT 미디어랩에서 개발한 클라우드 기반의 안드로이드용 앱 인벤터2(App Inventor 2)를 사용하며, 제작한 앱을 스마트 기기에서 즉시 실행하고 확인할 수 있다는데 대해 학습만족도와 성취감이 높음을 수업관찰을 통해 확인할 수 있었으며 제작 과정에서도 활발한 사고력를 발휘하는 것을 확인할 수 있었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.145-147
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• 2017

본 논문에서는 4차 산업 혁명의 주요 기술 중 하나인 '연결 및 표시 기술'에서 사람의 눈으로 보는 표시 기술 중 하나인 증강현실(AR)과 가상현실(VR)를 융합한 MR기술을 활용한 앱 어플리케이션에서 제공하는 콘텐츠를 이용자들이 쉽게 접근해서 사용할 수 있도록 제안한다. 증강현실을 나타내는 방법 중 하나인 Marker를 이용한 기술을 통해서 관광 콘텐츠를 제공할 수 있도록 프로토타입을 구현하였다. 사용자가 앱 어플리케이션을 통해 Marker를 인식하게 되면, 거기서 관광 관련 콘텐츠를 스마트폰 화면에 띄어서 제공되는 콘텐츠를 자유롭게 이용 할 수 있는 효율성을 제공할 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.405-408
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• 2018

이 연구의 목적은 기존 EPL 관련 연구들을 조사 및 수집하여 메타분석을 통해 초등학생의 고등사고력 향상에 미치는 전체 효과 크기의 산출과 다양한 변인에 따른 효과크기를 확인하는 것이다. 그래서 이 연구로 초등학생의 고등사고력 및 다양한 요인들에 대한 EPL 교육의 실제적 효과를 객관적으로 확인하고 일반화하였다. 이 연구의 결과는 1)EPL을 활용한 교육이 초등학생들의 고등사고력을 크게 향상시키는 교수학습 도구임이 확인되었고, 2) EPL을 활용한 교육은 창의적 사고력, 논리적 사고력 등의 향상에 크게 도움이 되는 것으로 확인되었으며, 3) App Inventor, Scratch, Dolittle 등이 고등사고력 향상에 미치는 효과가 큰 것으로 확인되었다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.01a
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• pp.237-240
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• 2014

오늘날 학생들에게 스마트폰은 일상생활에서 빼놓을 수 없는 친숙한 기기이지만 단순한 오락 위주의 활용에 그치는 경우가 대부분이다. 스마트폰을 손안의 작은 컴퓨터라는 관점에서 본다면 이는 더욱더 안타까운 실정이다. 왜냐하면 스마트폰은 그 동안 물리적 현실적 제약조건을 벗어나 다양한 교육활동을 가능하게 할 수 있는 교육 도구로써도 의미가 있기 때문이다. 이에 본 연구에서는 앱 인벤터를 활용한 PBL프로그래밍 교육을 연구하고자 한다. 앱 인벤터를 통해 학생들은 실제로 활용가능한 앱을 만들 수 있다는 점은 다른 교육용프로그래밍 언어와 차별화된 점이라 할 수 있다. 이러한 장점을 적극 활용하여 학생들의 흥미와 관심을 지속적으로 유지시키며 프로그래밍 교육을 할 수 있다는 점에서 의미가 있다고 생각한다.