• The KIPS Transactions:PartD
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• v.9D no.3
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• pp.487-494
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• 2002

In this paper, we present an equation edition system, which is designed and implemented according to the W3C MathML standard. The system can be used to edit equations for the various web-oriented applications. Various user-friendly interfaces are provided for the easy and efficient edition of equations. The edited equations can be viewed immediately with the representation modules. To improve the processing speed of equations, we upgraded functions of the conventional XML parser. The presented system will contribute to the extensive usage of equations on the web and efficient processing of XML documents with equations.

• Proceedings of the KSRS Conference
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• v.1
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• pp.166-169
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• 2006

Our country's coast is vulnerable area to natural disaster which the repetitive damages occur every year including a loss of lives, the damage of facilities and erosion mostly except for the east coast because of a typhoon, tidal waves, sea water overflowing by topographic structure of low-lying gentle slope and shallow sea. However, as for prevention of natural disaster occurring every year, the situation is that it's centered on the restorationcentered measures and the general disaster prevention research to minimize damages at the time of disaster occurrence is insufficient. This study intendedlop t to devehe techniques possible for real time sampling of damage prediction areas on Web in order to support decision making for damage prevention and establishment of disaster prevention policy. For this, the thematic map was produced related to disaster based on high-resolution satellite picture, and the environmental DB similar to real world was constructed through topographic construction of three-dimension integrating the parts of land and the sea. In addition, the system was developed possible for the expression of damageable regions by real time grasp of dangerous regions at the time of disaster occurrence through over flowing simulation of three-dimension, and it's intended to prepare a basis to minimize damages to disaster situations through it.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.340-345
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• 2009

기존 파일 시스템의 검색은 검색결과를 제목과 요약문의 텍스트 형태로 제공함으로써 검색 결과가 많은 경우에 한눈에 결과를 살펴보는데 불편할 뿐 아니라 사용자가 직접 수많은 검색결과의 표제나 저자, 목차, 요약문을 확인하여 적합한 정보를 일일이 판별해야 하는 불편이 있다. 이에 정보들간의 유사도를 계산하여 군집화하고, 키워드와 검색결과들 간의 적합도와 검색결과들 간의 연관성 정보를 3D 공간 상에 디스플레이 하는 'DocuSynth' 시스템을 개발하였다. 이 연관성 정보들은 실세계 상의 3 차원 메타포인 '거리'로 변환되어 디스플레이 된다. 즉, 사용자로 하여금 정보간의 거리가 가까울수록 연관도가 높다고 직관적으로 인지할 수 있는 화면으로 설계하였다. 또한 3D 환경의 사용성을 높이기 위해 네비게이션 컨트롤러와 컨트롤 변수에 대한 사용성 평가를 실시하여 시스템 변수로 적용하였다. 본 연구결과는 향후 도래할 3D Web 에 대한 아이디어 제시와 구현 가이드라인으로 활용될 것으로 예상된다.

• Korean Journal of Optics and Photonics
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• v.20 no.2
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• pp.102-109
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• 2009

In this paper, we introduce an eye-tracking 3D display system using variable parallax barrier and DDC communication. A barrier of variable parallax barrier composed of 4 sub-barriers and a commercially available web camera is utilized to implement the eye-tracking system. The coordinates of a viewer is extracted from the web camera transfer to 3D display via DDD/CI communication. The variable barrier attached to the LCD moves electrically according to the right eye position for 3D images. This system is compared experimentally with the commercial parallax barrier methods.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.5 no.4
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• pp.723-729
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• 2001

We are able to work on the shared virtual space in Web-based Collaborative Design System using only Internet and Web browser. The users connect to the Solid Modeler Server through m and they create 3D shape and manipulate them variously. Then the users will share 3D objects and two problems can arise. The users must be able to pick the objects effectively which they want to manipulate. When one of the users manipulates a particular object, others should not disturb with the same object. In this paper, picking is implemented not only by computing intersection of mouse pointer with the objects of the virtual world, but also by using capabilities and attributes of scene graph node, by setting bounds intersection testing instead of geometric intersection testing, by limiting the scope of the pick testing, using Java 3D. These methods can reduce the computation of picking and can pick 3D objects effectively and easily using the system of hierarchy. To have effective concurrency, we used shared lock and exclusive lock as the action in work space.

• The KIPS Transactions:PartD
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• v.11D no.2
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• pp.435-442
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• 2004

It is important to integrate an enterprise application for automating of the business process, which is responded by a flow of market environment. There are two categories of method that integrate enterprise applications. One is Synchronous Integration, and the other is Asynchronous Integration. EAI(Enterprise Application Integration) and Web service which of the asynchronous integration is focused in the automating method of the business process. After we construct the application integration for automating of the business process, we have to concern about managing of the business transaction. Many Organizations have proposed the process method of business transaction based on 2-phase commit protocol. But this method can't supply the phase that classify the transaction by transaction weight. In this paper, we propose an efficient method of transaction process for business transactions, which is composed by "Classify Phase" that classify transactions. We called this model "3-Phase Commit Method Applied by Classify Phase, " we design this model to manage an resource of enterprise efficiently. The proposed method is compared by the method based on 2-Phase commit that could be a problem of management the resource of enterprise, and the advantage of this method is certified to propose the solution of that problem.ion of that problem.

• Proceedings of the CALSEC Conference
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• 1998.10b
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• pp.415-422
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• 1998

The international standard STEP for representation and exchange of product model data, and CORBA as a standard for distributed object computing environment are expected to play very important role in the future manufacturing environment. Platform independent network programming language Java is also becoming a standard environment for developing Internet/Intranet applications. Furthermore, the ObjectWeb environment supported by the combination of CORBA and Java technology provides very efficient and convenient way of developing network applications and user interfaces. In this research, we developed a framework for the real time sharing of STEP data and 3D conference in the ObjectWeb environment and tested our proposal by implementing prototype software which we call STEPShare.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2000.10a
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• pp.364-367
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• 2000

As computer system and information/communication technology develop rapidly, nowadays CSCW(Computer Supported Collaborative Work) system appears, through which it is available to work on virtual space without any restriction of time and place. Most of Un systems depend on a special network and groupware. The systems of graphics and CAD are not so many because they are characterized by Hardware and application software. In this paper, we propose a web-based collaborative CAD system which can be jointly worked on Internet WWW being independent from any platforms. It can generate and handle objects easily using lava 3D, and it can transmit, print, and store them. The interactive work for designing objects can be also carried out through dialling with each other. This system is executed in the environment of Client/server. Clients connect to the server through lava applet on WWW. The server is implemented by lava application, and it consists of three components : connection manager which controls the contact to users, work manager which keeps viewing in concurrency and provides virtual work space sharing with others, and solid modeler which generates 3D object.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2690-2692
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• 2004

Medications or cognitive-behavior methods have been mainly used as a treatment of alcoholism. lately the virtualy technology has been applied to the kink of alcoholic disorders. A virtual environment makes him having ability to over come the drink. In this study, we were implemented by making panorama images and 3D object modules using 3D Studio MAX. VRML, JAVA Applet. And the BAR stimulator that composed with a position sensor head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a alcoholism and and without a liquor bottle, heart rate was measured during experiment, and also measured a Person's HR after the virtual reality training. we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.05a
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• pp.411-414
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• 2005

This paper presents how to design and construct the Il-sun bridge, the first PSC box girder bridge with Corrugated Steel Web(CSW) in Korea, including 3D analysis results according to construction steps. Also, the 3D analysis for the beams with CSW was performed for the purpose of verifying the role of the flange plate. As the results of this analysis, it is founded that the flange plate plays a role to resist the flexural strength in the nonlinear region. In the near future, we are plan to carry out the load test for these beams with CSW.