Gyeongin National University of Education is a national institution which provides training for future public elementary school teachers in South Korea. It was founded on May 23, 1946 under the name of Gaeseong School of Education in Gyeonggi-do. In 2003, the institution changed its name from Inchon National University of Education to Gyeongin National University of Education. The university is the largest educational institute for training future elementary school teachers in Korea. The university has two campuses: Incheon campus in Gyesan-dong, Gyeyang-gu, Incheon, and Gyeonggi campus in Seoksu-dong, Manan-gu, Anyang in Gyeonggi-do. The university offers graduate and undergraduate programs, and has an attached elementary school. Wikipedia.
Hong S.-I.,Gyeongin National University of Education |
Choi J.-Y.,Youngdong University
Journal of the Korean Physical Society | Year: 2012
We describe how to calculate the input impedances of finite inhomogeneous ladder networks by transforming a product of 2 × 2 transfer matrices to a product of diagonal matrices up to a prefactor and a postfactor. In particular, we find the input impedances in closed form for three inhomogeneous ladder networks (a tapered ladder network, a balanced composite right/left-handed ladder network, and a ladder network with an arbitrary period) with a periodic transfer matrix. © 2012 The Korean Physical Society.
Lee S.,Gyeongin National University of Education
Computers in Human Behavior | Year: 2015
With the growing speed of SNS accelerated recently, there are increasing concerns about the possibility of young students doing negative SNS behavior. This study tried to discover the relationship between various variables such as gender, grade, SNS usage time, motives to use SNS, degree of using advanced functions of SNS, SNS dependency, and perceptions about SNS with negative SNS behaviors among elementary and middle school students. The analyses revealed that regardless of gender and grade, the most frequently committed negative behavior is 'stealing others' private information' and the least is 'cyber bullying', while 'contacting strangers' showing the most significant increase with the age. With the seriousness of negative SNS behaviors classified into four levels, it was found that the biggest significant difference across the levels appears on illegal use of photos and videos, followed by on verbal abuse and on cyber bullying. It was also found that a significant positive correlation exists between each of the factors considered and the negative SNS behavior. Based on these findings, a regression analysis was conducted to successfully extract several factors as significant predictors of the negative SNS behaviors. Furthermore, factors distinguishing the lowest level from the highest level of the negative SNS behaviors were identified to be gender, SNS dependency, utilization of advanced SNS functions, and grade, with its accuracy rate reaching as high as 85.6%. © 2014 Elsevier Ltd. All rights reserved.
Hong S.-I.,Gyeongin National University of Education |
Hong S.-C.,Korea University
European Journal of Physics | Year: 2014
We obtain generalized formulae for the moments of inertia of D( 2)-dimensional uniform solid spheres and spherical shells without actual integration. The derivation is based on the parallel axis theorem and the (generalized) perpendicular axis theorem along with rotational symmetry. © 2014 IOP Publishing Ltd.
Sohn W.-S.,Gyeongin National University of Education
International Journal of Applied Engineering Research | Year: 2014
Arduino, a physical computing platform, provides ideal environment for the cultivation of knowledge for software/hardware and has been utilized in many areas. In this study, a programming education strategy using Arduino is explored and, with this, an Arduino model and a coursework which can be implemented at site are developed and applied to the class of elementary school students to verify their effectiveness. To do this we designed teaching and learning model for Arduino-based programming education and then applied it to education field for 5 weeks with 26 students at Incheon education district. We develop the ‘bling-bling art design’ curriculum which is composed 10 chapters with LED artworks. We found that our approaches could more provide strength such as problem solving ability, creation techniques, interest for study compare than traditional programming education approaches. © Research India Publications.
Joo K.H.,Gyeongin National University of Education
Contemporary Engineering Sciences | Year: 2014
To make use of the recent distributed OLAP environment, researches on P2P (Peer-to-Peer) OLAP with the dynamic hybrid tree (DHT) and Grid OLAP are actively proposed. In addition, OLAP query execution costs many minutes by its enormous data and OLAP query properties. To adapt OLAP systems to the cloud computing environment, P2P OLAP has problems on executing multi-dimensional range queries because of P2P properties. In this paper, the central management Cloud P2P OLAP is proposed to provide an efficient cloud computing environment which query results are able to be reused with the time-series properties by various users. The Cloud P2P OLAP is grafted onto hierarchical hybrid P2P for fast query results and multi-dimensional range query, so that the index loads are distributed and the performance is improved. © 2014 Kil Hong Joo.