• Journal of Internet Computing and Services
• /
• v.9 no.6
• /
• pp.127-139
• /
• 2008

The value of up-to-date Mobile PC such as UMPC (Ultra Mobile Personal Computer) is recognized greatly in learning environment that busywork such as characteristic of transfer easy and real time communication possibility etc. and conversation with a colleague student, free sending of studying data and public ownership etc. is required. Wish to recognize whether is acting relevant role in u - unfold learning that inflect UMPC in integration research model, and UMPC is u searching for relevant element at studying activity unfolding process u - integration Inquiry-Based Learning that present in Korean education & research information service (KERIS) at fifth-year student science time In primary school in this research. This research result could take charge role of UMPCs' studying-activity though there is persistent feedback with teacher among studying-activity although UMPC's role is utilized on constituent that can be related with studying-activity in learning process.

• The Journal of Korean Association of Computer Education
• /
• v.9 no.6
• /
• pp.53-64
• /
• 2006

In this paper, I described a guide of developing contents to present the direction of developing contents for u-learning. After surveying a character of Ubiquitous computing and u-learning, I described a guide of developing contents which is composed 17 items in 5 fields. This guide is checked by experts and staffs to test a validity and reliability. As a result, It is proven having the validity and reliability. I expect it to guide the direction of developing contents for u-learning. Also, It will contribute to make effective contents which will not affected by technical development and can use continuously because of foreseeing the technical development of future.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2008.05a
• /
• pp.454-457
• /
• 2008

교육에서 평가는 교육의 효과를 분석하고 개선하기 위해서는 학생, 교사, 교육 환경에 대한 평가가 이루어져야 한다. 학생에 대한 평가는 학습 과정에서 학생의 참여 행위가 평가되어야 한다. 기존의 교육 방법에서는 학생의 참여도에 대한 공정한 정보를 취득하기가 어려웠다. 그러나 u-learning에서는 이러한 정보들을 그전의 교육 방법에 비해 쉽게 공정한 참여도 정보를 얻을 수 있기 때문에 평가도 공정하게 할 수 있는 환경이 갖추었다 할 수 있다. 본 연구에서는 u-learning 환경에서의 학습자들의 학습 행위에 대한 평가를 하는 방법을 u-learning 시스템 모델과 함께 제안한다.

• The Journal of Korean Association of Computer Education
• /
• v.10 no.6
• /
• pp.79-89
• /
• 2007

The advent of e-Learning paradigm requires a various type of e-Learning models and systems which are appropriate to support effective teaching-learning process. Accordingly, the teaching-learning system using the Internet and the intelligent tutoring system(ITS) in e-Learning environment has attracted a fair amount of critical attention. However there is a wide gap between infrastructure of a present educational site and the u-learning environment. Therefore, in this paper, an ITS teaching-learning model is proposed and system is developed for a school environment, which is based on a learner's cognitive structure and applies a concept of u-Learning, and then is verified for validity. X-Neuronet, the developed system, offers a method of representing a learner's cognitive structure so as to apply the method for the efficient individualized learning.

• Journal of Convergence for Information Technology
• /
• v.11 no.10
• /
• pp.45-52
• /
• 2021

In this paper, we proposed an Atrous Residual U-Net (AR-UNet) to improve the segmentation accuracy of semantic segmentation method based on U-Net. The U-Net is mainly used in fields such as medical image analysis, autonomous vehicles, and remote sensing images. The conventional U-Net lacks extracted features due to the small number of convolution layers in the encoder part. The extracted features are essential for classifying object categories, and if they are insufficient, it causes a problem of lowering the segmentation accuracy. Therefore, to improve this problem, we proposed the AR-UNet using residual learning and ASPP in the encoder. Residual learning improves feature extraction ability and is effective in preventing feature loss and vanishing gradient problems caused by continuous convolutions. In addition, ASPP enables additional feature extraction without reducing the resolution of the feature map. Experiments verified the effectiveness of the AR-UNet with Cityscapes dataset. The experimental results showed that the AR-UNet showed improved segmentation results compared to the conventional U-Net. In this way, AR-UNet can contribute to the advancement of many applications where accuracy is important.

• Journal of the Korea Society of Computer and Information
• /
• v.19 no.10
• /
• pp.135-149
• /
• 2014

This study proposed the ubiquitous learning system by finding the difficulties which students have in learning the course of science and analyzing the current learning applications that are used commercially. Through case studies, we found 4 problems. First, the request of long learning time by most of the existing video-based learning applications. Second, it is impossible to know their level of learning due to the lack of open learning contents. Third, it is difficult for learners to participate in interactive learning. Fourth, there are educational contents without considerations on the level of learners. To refine the difficulties due to these problems, we designed and implemented a new ubiquitous learning system which applies the small learning contents for short-term learning, open learning system and enhanced hierarchical learning contents. The system was implemented based on Android. It provides learners with useful science education. We conducted a questionnaire for third grade middle school students in order to show that the proposed system has a good educational effects. The questionnaire asks for the differences between the proposed ubiquitous learning system and the existing learning application. We concluded that the proposed system is better than the existing application by using t-test for improvement of learning effects using feedback with which students participate in interactive learning but not in unidirectional learning, and share the learning result.

• Journal of the Korea Society of Computer and Information
• /
• v.12 no.3
• /
• pp.295-302
• /
• 2007

The environment of education has been undergoing dramatic developments in recent years with the development of information technology such as digital information transfer, storage and communication methods. Education and training technology is constantly evolving and growing. Because we continually meet the new and interesting advances in our world. The evolution in education and training at a distance can be characterized as a move from traditional learning to u-learning. This paper concerns with the application of u-based education methodology for people with disabilities targeting to empower them. Instead of the classic educational support such as extended time to take exams, a reader and/or scribe to assist with exams and note taking services. In this paper, we introduce the definition of inclusion and disabilities which does not been fully understood what they mean and then possible implementing materials which can empower the students with disabilities with accomplishments. We would like to point out that we concentrate on the aspects of instructional science particularly related with inclusive classes.

• Journal of The Korean Association of Information Education
• /
• v.13 no.2
• /
• pp.127-134
• /
• 2009

As wireless-internet and mobile computer revitalizes, various teaching and learning strategies are appearing. In this study, we suggest a new integrated teaching method in u-learning environment effectively. First of all, to apply information technique to education effectively, we grasped various educational factors centered on learners. And then, we categorized them into contents, time and space as three vital factors and analyzed. Next, by combining the important factors, we suggested the new integrated teaching and learning strategy. We also operated personalized the integrated teaching for elementary school students and verified the effect. As a result, we learned that the integrated teaching was effective in the area of higher-level thinking presented as an effectiveness index, learning motivation and self-directed learning. That is, this study will promote excellence in education centered on learners in the hereafter u-learning environment and support general integrated education effectively.

• The Journal of the Korea Contents Association
• /
• v.7 no.12
• /
• pp.283-291
• /
• 2007

In the age of ubiquitous computing, computer systems will be seamlessly integrated into our everyday life, providing services and information to us in an anywhere, anytime fashion. This ubiquitous computing can be used for developing a ubiquitous learning (U-learning). In this paper, we present a framework for U-school in which ubiquitous computing technologies are applied to advance the existing ERSS (Korea's Educational Resources Sharing System). Our framework applies mobile, sensor, and context-aware technologies to the existing ERSS. This framework presents a user-centric learning environment, using user-centric scenario. The U-school with context-aware services therefore can lead to the just-in-time learning or learner-led learning based on dynamic contexts acquired from learners, teachers and computing entities.

• The Journal of the Korea Contents Association
• /
• v.7 no.9
• /
• pp.220-230
• /
• 2007

Recently, u-learning passing over ICT learning and e-learning becomes influential in Korean primary and secondary schools. U-learning is to be proliferated in accordance with the development of ubiquitous environment. In this paper, we introduced the situation and implications of the model cases of ICT learning, e-learning and u-learning designated by the Korean Ministry of Education and Human Resources Development.