• Proceedings of the Korean Magnestics Society Conference
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• 2007.05a
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• pp.129.1-129.1
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• 2007

• Honam Mathematical Journal
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• v.30 no.2
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• pp.335-341
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• 2008

In this paper, we use the convexity of distance function between geodesics in a singular Hadamard space to generalize Hadamard-Cartan theorem for 2-dimensional metric spaces. We also determine a neighborhood of a closed geodesic where no other closed geodesic exists in a complete space of nonpositive curvature.

• 한국디지털정책학회:학술대회논문집
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• 2006.06a
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• pp.281-288
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• 2006

Recently, information technology are rapidly diffused throughout the world. A new paradigm, 'telework' and 'distant education' is a product of the tremendous technological changes driving the disabled vocational rehabilitation. In the computer and information communication technology areas related with web-based telework-distant education, the disabled expect vocational rehabilitation. Therefore nowadays, the disabled effort to adapt to the new information era by web-based telework and distant education. This study attempts to suggest developmental framework of employment innovation model to vitalize the disabled vocational rehabilitation.

• Journal of Engineering Education Research
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• v.26 no.3
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• pp.12-19
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• 2023

The purpose of this study is to develop the Artificial Intelligence thinking-based education program for improving AI literacy and verify its effectiveness for beginner. This program consists of 17 sessions, was designed according to the "ABCDE" model and is a project-based program. This program was conducted on 51 first-year middle school students and 36 respondents excluding missing values were analyzed in R language. The effect of this program on ethics, understanding, social competency, execution plan, data literacy, and problem solving of AI literacy is statistically significant and has very large practical significance. According to the result of this study, this program provided learners experiencing Artificial Intelligence education for the first time with Artificial Intelligence concepts and principles, collection and analysis of information, and problem-solving processes through application in real life, and served as an opportunity to enhance AI literacy. In addition, education program to enhance AI literacy should be designed based on AI thinking.

• Journal of the Semiconductor & Display Technology
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• v.7 no.2
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• pp.13-17
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• 2008

In this paper, in order to get the characteristics of the lithium secondary cell, such as charge and discharge characteristic, temperature characteristic, self-discharge characteristic and the capacity recovery rate etc, we build a thermal model that estimate the impedance of battery by experiment & simulation. In this one-dimensional model, Seven governing equations are made to solve seven variables c, $c_s,\;\Phi_1,\;\Phi_2,\;i_2$, j and T. The thermal model parameters used in this model have been adjusted according to the experimental data measured in the laboratory. The result(Voc, Impedance) of this research can be used in BMS(Battery Management System), so an efficient method of using battery is developed.

• Proceedings of the IEEK Conference
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• 2002.07a
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• pp.250-253
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• 2002

We have implemented an interactive multimedia education system for C programming. The system consists of two pars. One is multimedia contents to help students better understand C language syntax, programming style, and program logic and the other is a web-based compilation support system that compiles C programs at the server side which are submitted trough Web by students and returns their execution results to the students' PC. Although there are currently some restrictions that students should replace the inputs functions such as scanf(), getc() and getch() with assignment statements or fscanf(fp, , ), since the system has been implemented using general web technologies and shareware C compiler, the education system could be one solution that education institutions seek to reduce annual immense expenditure of money on C complier.

• Journal of Korea Technology Innovation Society
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• v.6 no.1
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• pp.74-91
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• 2003

Science and Technology University(STU) will be established by twenty-two government institutes next year. STU has latent problems with geographical limitations caused by organizing the faculties and facilities of the government research institutes, which are located all over the country. This study tries to examine the Educational Administration(Opreation) Model of STU and analyse expected problems and further, proposes the introduction of cyber education system which will maximize efficiency of educational operation of the system and enhance learning. It also discusses the practical problems in the implementation of cyber education system.

• Proceedings of the KAIS Fall Conference
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• 2010.11a
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• pp.54-57
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• 2010

본 논문에서는 태양광, 풍력, 연료전지등과 같은 신에너지전원의 단지를 효율적으로 유지관리하기 위하여 유 무선 네트워크를 이용한 원격감시 제어장치를 제작하였다. 이 감시제어장치는 모의 배전계통장치와 유무선통신장치(AutoBase 포함)를 이용한 감시제어장치, 모의 태양광전원장치로 구성하였다. 여기서 감시제어장치는 태양광전원에서 실시간으로 출력되는 전압, 전류데이터를 무선네트워크로 전송하여, HMI 프로그램인 Autobase로 실시간 모니터링할 수 있는 감시장치 부분과 원격지점에서 태양광 전원을 On/Off 하기 위한 제어장치 부분으로 구성된다. 본 논문에서 제작한 장치를 이용하여, 신에너지전원 단지의 유지보수를 위한 무선네트워크의 기술적인 대안을 마련하고, 스마트그리드 구축에 기여할 수 있음을 확인하였다.

• Journal of the Korea Safety Management & Science
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• v.23 no.4
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• pp.113-120
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• 2021

In the past, manufacturing-oriented industries focused on improving labor productivity to achieve economic growth. Korea is changing from a labor-intensive industry to a technology-intensive industry in order to occupy a competitive edge compared to other countries. Recently, a lot of investment has been made not only in technology-intensive industries but also in information industries. Therefore, it is developing in various forms such as special technology, platform industry, and virtual reality as a technology-intensive industry and information industry field. In this social phenomenon, the necessity of starting a business using new ideas and technologies is increasing. Therefore, universities also need entrepreneurship education for their students, and it is necessary to investigate how the contents of the university's start-up education support, individual achievement needs, and the degree of acquisition of start-up knowledge affect the establishment of business strategies necessary for start-ups.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.501-503
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• 2022

본 논문은 이동 노드간 클러스터링을 함에 있어 보다 효율적인클러스터링을 제공하고 유지하기 위한 딥러닝의 자율학습에 따른 군집적 알고리즘을 제안한다. 대부분의 클러스터링 군집데이터를 처리함에 있어 상호관계에 따른 분류체계가 제공된다. 이러한 경우 새롭게 입력되거나 변경된 데이터가 비교정보에서 오염된 정보로 분류될 경우 기존 분류된 클러스터링으로부터 오염된 정보로 이해되어 군집성을 저하시키는 요인으로 작용 할 수가 있다. 본 논문에서는 이러한 상황정보를 이해하고 클러스터링을 유지할 수 있는 자율학습기반의 학습 모델을 제시 한다.