• The Journal of Korean Association of Computer Education
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• v.17 no.5
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• pp.1-13
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• 2014

Programming education helps learners solve real world problems by applying the principles of computer science. In particular, in the case of object-oriented programming centered around objects or problems that are observed in the real world, learners are able to make the most use of their programming skills in real life. Therefore, in this study, we sought ways to have learners grasp object-oriented concepts in a learner-friendly manner. To this end we conducted an experiment with six students as participants. As a result we could derive two main points. First, the learning tools which can be easily used by learners are required. Second, it is necessary to think thoroughly to learn concepts before implementation of the programming. This study has significance in the sense that it provides a learning method which helps a novice learner to learn the object-oriented programming that he or she feels difficulty to understand.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1505-1506
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• 2011

소셜 서비스의 확산에 따라 이러닝 분야에서도 소셜러닝이 확산되고 있다. 소셜러닝이 기존 교육과 구별되는 가장 큰 특징은 콘텐츠의 생산과 소비 방법으로, 네트워크를 통해 가치를 전달하고, 다른 사람으로부터 배운다는 것이다. 따라서 소셜미디어 콘텐츠와 소셜네트워크 활동 콘텐츠를 학습객체화하여 함께 이용할 수 있어야 한다고 본다. 이를 위해 본 논문에서는 소셜미디어 콘텐츠를 학습객체화 할 수 있도록 콘텐츠 생성모델 확장 방안을 제안하고자 한다. 소셜자원기반 콘텐츠 생성모델은, 학습객체 정의와 메타데이터 생성모델로 구성된다.

• Journal of Intelligence and Information Systems
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• v.28 no.2
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• pp.101-125
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• 2022

Recently, with the development of computing technology and the improvement of the cloud environment, deep learning technology has developed, and attempts to apply deep learning to various fields are increasing. A typical example is anomaly detection, which is a technique for identifying values or patterns that deviate from normal data. Among the representative types of anomaly detection, it is very difficult to detect a contextual anomaly that requires understanding of the overall situation. In general, detection of anomalies in image data is performed using a pre-trained model trained on large data. However, since this pre-trained model was created by focusing on object classification of images, there is a limit to be applied to anomaly detection that needs to understand complex situations created by various objects. Therefore, in this study, we newly propose a two-step pre-trained model for detecting abnormal situation. Our methodology performs additional learning from image captioning to understand not only mere objects but also the complicated situation created by them. Specifically, the proposed methodology transfers knowledge of the pre-trained model that has learned object classification with ImageNet data to the image captioning model, and uses the caption that describes the situation represented by the image. Afterwards, the weight obtained by learning the situational characteristics through images and captions is extracted and fine-tuning is performed to generate an anomaly detection model. To evaluate the performance of the proposed methodology, an anomaly detection experiment was performed on 400 situational images and the experimental results showed that the proposed methodology was superior in terms of anomaly detection accuracy and F1-score compared to the existing traditional pre-trained model.

• KIPS Transactions on Software and Data Engineering
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• v.7 no.11
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• pp.411-418
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• 2018

With the proliferation of artificial intelligence technology, it is becoming important to obtain, store, and utilize scientific data in research and science sectors. A number of methods for extracting meaningful objects such as graphs and tables from research articles have been proposed to eventually obtain scientific data. Existing extraction methods using heuristic approaches are hardly applicable to electronic documents having heterogeneous manuscript formats because they are designed to work properly for some targeted manuscripts. This paper proposes a prototype of an object extraction system which exploits a recent deep-learning technology so as to overcome the inflexibility of the heuristic approaches. We implemented our trained model, based on the Faster R-CNN algorithm, using the Google TensorFlow Object Detection API and also composed an annotated data set from 100 research articles for training and evaluation. Finally, a performance evaluation shows that the proposed system outperforms a comparator adopting heuristic approaches by 5.2%.

• Proceedings of the Korean Society of Computer Information Conference
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• 2009.01a
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• pp.237-240
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• 2009

감시 시스템은 지역의 특성에 따라 다양한 환경 및 설치 조건을 가지게 되며, 지능적 처리 요구에 따라 객체 분류를 필요로 한다. 본 논문에서는 검출된 객체로부터 특징 정보의 자율적 추출 및 학습을 이용하여 객체를 분류하기 위한 방안을 제시하고자 한다. 다양한 환경 및 설치 조건에서도 감시 시스템의 입력과 처리에 대한 추가적 보정 과정이 필요하지 않으며, 연속적으로 입력되는 객체의 형태와 움직임 정보를 효과적으로 활용하여 객체의 특징 추출 및 분류가 가능하게 된다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.70-72
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• 2005

최근 초고속 통신망과 같은 우리나라의 발달된 인터넷 인프라를 활용할 수 있는 e-Learning 콘텐츠 활발히 개발되고 있다. 본 논문은 기존에 개발된 콘텐츠와 평가를 포함한 교수,학습 활동 계획을 관리할 수 있는 ICT 교육 통합 지원 시스템을 구성하는 서브시스템 중 교수,학습 콘텐츠 관리 시스템을 설계, 구현하였다. 이를 위하여 이미 개발되고 중앙교수학습센터 및 시,도 교수학습 지원센터 등에서 제공되고 공유되는 학습자료를 활용하기 위해 KERIS 등에서 제시한 표준을 본 시스템의 설계에 반영하였다. 교수,학습 콘텐츠 관리 모듈은 학습객체를 분류 저장 데이터베이스화 하였으며 실제 활용이 매우 쉬어 특별한 훈련이나 교육을 받지 않아도 기초적인 수준의 PC 활용 능력만 있다면 누구나 쉽게 교수,학습 콘텐츠를 수집하여 활용할 수 있도록 하였다. 본 시스템은 기 개발된 학습객체의 재사용으로 인한 효율성 증가는 물론 교과, 단원 학습 주제별로 구조화하여 저장 관리하여 교사의 교수활동 준비 시간을 줄임으로써 실제 학교 현장에서 활용하여 ICT 활용 교수,학습 활동 개선에 도움이 될 것으로 기대한다.

• Journal of The Korean Association of Information Education
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• v.7 no.2
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• pp.199-206
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• 2003

XML is becoming a new developing tool of web technology because of its ability of data management and flexibility in data presentation. So it's well researched that the reusability and integration with learning objects such as text, image, sound, video and plug-in programs of web contents in computer education. But the research for storing, extracting and integrating metadata about learning object was needed prior to implementing online learning system to integrate and manage it. Therefore this study propose a new method of using web service of DBMS for extracting learning object's metadata in database server which located in 3-tier system. To evaluate the efficiency of proposed method, The test server and two DBMSs(MS SQL Server 2000 and Oracle 9i) which have 30 metadata was implemented and the response time of it was measured. The response time of it was short, but in order to using this method the additional programming with SAX/DOM was necessary.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.10
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• pp.883-892
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• 2021

This paper provides a process for developing deep learning-based aerial object detection models that can run in realtime on onboard. To improve object detection performance, we pre-process and augment the training data in the training stage. In addition, we perform transfer learning and apply a weighted cross-entropy method to reduce the variations of detection performance for each class. To improve the inference speed, we have generated inference acceleration engines with quantization. Then, we analyze the real-time performance and detection performance on custom aerial image dataset to verify generalization.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.571-575
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• 2015

This paper propose a temporal histogram -based behavior pattern analysis algorithm to analyze the movement features of moving objects from the image inputted in real-time. For the purpose of tracking and analysis of moving objects, it needs to be performed background learning which separated moving objects from the background. Moving object is extracted as a background learning after identifying the object by using the center of gravity and the coordinate correlation is performed by the object tracking. The start frame of each of the tracked object, the end frame, the coordinates information and size information are stored and managed by the linked list. Temporal histogram defines movement features pattern using x, y coordinates based on time axis, it compares each coordinates of objects for understanding its movement features and behavior pattern. Behavior pattern analysis system based on temporal histogram confirmed high tracking rate over 95% with sustaining high processing speed 45~50fps through the demo experiment.

• Journal of Korea Multimedia Society
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• v.7 no.8
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• pp.1131-1144
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• 2004

In this paper, we investigate a problem with an e-learning system for e-business environments and introduce the solving method of the problem. To be more accurate, existing Web-hosted and ASP (Application Service Provider)-oriented service model is difficult to cooperate and integrate among the different kinds of systems. So we have produced sharable and reusable learning object, they have extracted a principle from pedagogical designs for units of reuse. We call LIO (Learning Item Object). This modeling makes use of a constructing for XML Web Services. So to speak, units of reuse from pedagogical designs are test tutorial, resource, case example, simulation, problem, test, discovery and discussion and then map introduction, fact, try, quiz, test, link-more, tell-more LIO learning object. These typed LIOs are stored in metadata along with the information for a content location. Each one of LIOs is designed with components and exposed in an interface for XML Web services. These services are module applications, which are used a standard SOAP (Simple Object Access Protocol) and locate any computer over Internet and publish, find and bind to services. This guarantees the interoperation and integration of the different kinds of systems. As a result, the problem of e-learning systems for e-business environments was resolved and then the power of understanding about learning objects based on pedagogical design was increased for learner and instruction designers. And organizations of education hope for particular decreased costs in constructing e-learning systems.