• Journal of the Korean BIBLIA Society for library and Information Science
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• v.20 no.4
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• pp.85-100
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• 2009

This study suggested the expansion strategies of school library catalog considering educational context which should be used teaching and learning process. To achieve the purpose of research, this study derived educational context categories by comparing and analyzing teaching and learning related factors, information resource related factors. Also, this study analysed case system considering educational context. Based on the results, this study designed the catalog data elements as an element to be added to an existing school libraries system(DLS). The derived data element is end user(teacher, students), instructional situations (teaching method, instructional object, curriculum, evaluation type), resource type(feature, discipline, format), reading situation(contextual reading, literature topic), related materials(teacher representation, student representation).

• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.616-618
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• 2004

The Simple Virtual Environment (SVE) library is the application programming interface fur creating the virtual environment easily. Even though it has a lot of efficient features, applying transformation to absolutely positioned objects is difficult. In this paper, we designed a simple method with which it is possible to rotate the absolutely positioned object freely. To test the method, we designed a simple virtual environment. The environment is designed with people, street and building objects. To reduce time consumption of displaying high-detailed people models, we only used texture-based objects. The person objects are modeled as quadric-shape and textured with front-view images of people. To make more realistic environment, objects always change its orientation themselves following to the user location. The result and the testing environment will be demonstrated.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.1
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• pp.65-71
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• 2013

In this work, new smart phone based moving target detection is proposed. In order to implement the task, methods of real time image transmission from network camera, motion detecting algorithm and its effective implementation are also addressed. The network camera transfers image data by MJPEG format which contains various information such as data and IP address, and the smart phone separates the image data received through a WiFi module. Later, the image data is converted to a Bitmap image format, and with the help of the embedded OpenCV library on a smart phone and algorithm, it was found that the moving object was identified effectively in terms of real time monitoring and detection.

• Transactions of the Korean Society of Automotive Engineers
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• v.8 no.4
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• pp.158-168
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• 2000

Vehicle driving simulators can provide engineers with benefits on the development and modification of vehicle models. One of the most important factors to realistic simulations is the fidelity given by a motion system and a real-time visual image generation system. Virtual reality technology has been widely used to achieve high fidelity. In this paper the virtual environment including a visual system like a head-mounted display is developed for a vehicle driving simulator system by employing the virtual reality technique. virtual vehicle and environment models are constructed using the object-oriented analysis and design approach. Accordint to the object model a three dimensional graphic model is developed with CAD tools such as Rhino and Pro/E. For the real-time image generation the optimized IRIS Performer 3D graphics library is embedded with the multi-thread methodology. Compared with the single loop apprach the proposed methodology yields an acceptable image generation speed 20 frames/sec for the simulator.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.751-755
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• 1995

It become more difficult to anticipate the performance of fluid power systems as the number of components increases because of nonlinearrities inherent in hydraulic components. In this situation, the computer simulation technique can be an effective tool in the analysis and design of fluid power systems. In this paper, simulation results are presented for dynamic characteriatics of a knuckle crane. Simple models for hydraulic components and relatively detailed motion equations for attachments are used. the simulation reaults are very close to those of experiments. The simulation is performed using a simulation package developed with object-oriented method. This package provides the encironment that user can construct desirct desired circuits form the component library, checks the continuity and compatibility conditions automatically and executes simulation

• Journal of the Korean Society for Precision Engineering
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• v.17 no.7
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• pp.80-89
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• 2000

Driving simulators provide engineers with a power tool in the development and modification stages of vehicle models. One of the most important factors to realistic simulations is the fidelity obtained by a motion bed and a real-time visual image generation algorithm. Virtual reality technology has been widely used to enhance the fidelity of vehicle simulators. This paper develops the virtual environment for such visual system as head-mounted display for a vehicle driving simulator. Virtual vehicle and environment models are constructed using the object-oriented analysis and design approach. Based on the object model, a three-dimensional graphic model is completed with CAD tools such as Rhino and Pro/ENGINEER. For real-time image generation, the optimized IRIS Performer 3D graphics library is embedded with the multi-thread methodology. The developed software for a virtual driving simulator offers an effective interface to virtual reality devices.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.1210-1212
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• 1998

The complexity of newly developed protection algorithm and higher performance requested by the user makes the software embedded in the protective relay much harder to develop and maintain. The versatility of 32bit microprocessor and the availability of cheaper memory semiconductors introduced the fertile developing background for the protective relay developers. The use of component object model(COM) in the software developing process enables the developer to write much complex code in the easy and safe way and to maintain the code easily, too. And the aid of the COM library, the distributed computing environment will be expected to appear by the use of the COM programming model in the protective relay firmware program.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.866-868
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• 2011

In this paper, we propose an implementation of user interaction effect of web application using jQuery. jQuery is a very popular and extensible JavaScript library. It is strong in controlling DOM(Document Object Model), events and Ajax. But, it is poor at advanced effect of web user UI(User Interface). Implementing advanced effects need to extend jQuery or some skills. So, our proposal is a good way to implement UI effects.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.105-106
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• 2022

본 논문에서는 YOLO v3 라이브러리를 이용하여 CCTV 저장 공간을 확보하는 모델을 제안한다. 사회안전망을 구축하기 위해 CCTV 설치가 확대되고, 그에 따라 많은 CCTV가 운영됨에 있어 저장 공간이 부족한 현상이 늘고 있다. 이에 본 논문에서는 학습된 데이터 셋을 활용하여 CCTV 영상파일의 프레임을 확인하여 움직임이 있는 객체가 있는지 판단하고, 움직임이 감지되는 프레임 영상을 저장한다. 제안 모델을 적용하여 테스트 한 결과 원본 데이터 크기보다 결과 데이터 크기가 85% 감소됨을 확인하였다. 인적이 드문 곳에 설치된 CCTV의 경우 제안 모델을 적용할 경우, 저장 공간의 관리 및 운영이 용이해질 것으로 기대할 수 있다.

• Journal of KIISE:Software and Applications
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• v.31 no.9
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• pp.1131-1141
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• 2004

Cohesion refers to the degree of the relatedness of the elements in a module, and it is widely accepted that the module of higher cohesion is easier to understand, maintain, and reuse. Recently, several cohesion metrics have been proposed to measure the cohesiveness of classes in an object-oriented program. However, the existing cohesion metrics do not consider the characteristics of dependent instance variables that are commonly used in a class and, thus, do not properly reflect the cohesiveness of the class. This paper presents an approach for improving the cohesion metrics by considering the characteristics of the dependent instance variables in an object-oriented program. To demonstrate the importance of the dependent instance variables, a case study has been conducted on a class library.