Virtual Reality Modeling Language

We developed a networked virtual reality system on which one could have live videoes with high iteractive usage. However, since a client in our system receives both live videoes and computer graphics objects continuously from a server while it is rendering the current frame of the virtual world, a quality of the presentation of the virtual space depends on the current available system resources on the client as well as network resources. In this paper, we discuss the notion of QoS for a networked VR system as an application level QoS which is based on the notion of an importance of presence (IoP) of objects in a virtual space calculated by a distance from a current user's position to the object and an angle from the user's perspective to the object. Then, we show a heuristic mapping mechanism of the application level QoS to a network level QoS which determines the allocation of bandwidth of videos and CG objects to maximize the presentation quality. We adopt bandwidth as a...

The first version of VRML allows for the creation of virtual worlds with limited interactive behavior. These worlds can contain objects which have hyper-links to other worlds, HTML documents or other valid MIME types. When the user selects an object with a hyper-link, the ...

A geographical information system (GIS) is used to capture, store, retrieve, analyzed and display the spatial (locationally defined) data. In contrast to traditional GIS, multimedia GIS is not only able to collect, analyze and store the data in traditional formats i.e. text, images (pictures) and graphs but also audio (sound), animations and video (moving pictures) as well. In this paper the advantages of multimedia GIS over traditional GIS are explained. Multimedia GIS is fully capable of providing services to both technical and non-technical users and users of multimedia GIS can retain more knowledge than users of traditional GIS. It can be applied to various fields such as tourism, environment, education etc. Some implementation issues such as data updating, information retrieval and data compression etc. are also addressed. Finally, future development of MMGIS (using new multimedia technologies such as Virtual Reality and Virtual Reality Modeling Language) is discussed.

Virtual Reality Modeling Language (VRML) is widely used to represent, create, and display virtual reality objects and their environment. Some VRML applications require concurrent interaction by multiple users in a real-time dis- tributed fashion. Such applications need a method for users to share and update the VRML objects in real-time. To al- low concurrent shared real-time access, our approach is

Abstract. In this chapter we introduce Virgilio, a system which supports the construction of non-immersive VR-based visualizations of complex data objects representing the re sult of a query performed on a multimedia database. Virgilio takes as input the dataset resulting from a query on a generic database, displays attribute values of the dataset on virtual world objects according to the capability of these objects to represent the proper type of data, represents semantic relationships among the objects in the dataset using the containment relationship and creates a corresponding visual representation composed of a collection of Virtual Reality Modeling Language scenes. 1.

The Haghia Sophia in Istanbul belongs with its unique dome construction to the outstanding and extraordinary architectural structures in the whole world. Built between 532 and 537 during the Byzantine Emperor Justinian (527565), it reflects the sum of all experiences and knowledge of the classical antiquity and it is one of the important monuments of the world heritage. Nowadays the building is under investigation sponsored by UNESCO. New techniques of digital applications in photogrammetry and information sciences open new possibilities for documentation and investigations of such kind of buildings. The Conservation and Restoration Branch of Historical Buildings asked the Photogrammetry Division of the Istanbul Technical University to prepare orthophotos of the Hagia Sophia. Together with the Institute of Photogrammetry and Remote Sensing of the Vienna University of Technology, it was decided also to create a high quality 3D model of the dome, so that the obtained results can later...

Propoes a methodology that enables a dynamic and interactive 3‐Dvisualization model of the assembly process to be developed from the CAD files of each part in the assembly. Makes three main contributions to the research in this area. First, a taxonomy of features for assembly is presented. Second, a process model for generating interactive 3D models of the assembly process is developed and, third, a new algorithm for creating a dynamic assembly model is derived. This algorithm, called the 3D assembly visualization (3AV) algorithm, involves instantiating the motion attributes that specify the motion of each part in the assembly. This dynamic assembly model is then converted to a 3‐D renderable format for visualization. An example is presented that uses virtual reality modeling language (VRML) as the 3‐D representation language. The result is a dynamic and interactive visual representation of the assembly operation. Such visualization can be of considerable use in DFA.

Nowadays the Internet plays an important role in a promotion campaign. Valorising some products and services through the Internet may be performed by choosing an appropriate Web technology. Due to the fact that in many small and middle-sized enterprises ERP (Entreprise Resources Planning) systems SAP integrated are implemented, we have been preoccupied by the way in which tri-dimensional graphic may be used in order to promote certain products in Web Dynro for ABAP (in shortg WD4A or WDA), the last/ latest SAP technology to develop Web applications in ABAP environment. Not exist reference about using the VRML sources in actual SAP system. This paper presents a simple solution that allows use the VRML sources in actual SAP technologies.

This paper reviews the area of grid computing in relation to virtual reality. The purpose of this paper is to describe our work on the visualization of an areas using virtual reality technology. Virtual reality modeling language (VRML) was used in this work, and access grid was used for data sharing in a grid computing environment to support collaborative work. Access grid is a tool which supports the interaction and collaboration which provide applications such as video conferencing, data sharing, shared applications, and shared services. In this work the shared VRML flies developed depict a lake area surrounded by mountains. We created some 3D-diagrams which show several parameters to support a kind of teleimmersive decision support system. Access grid is used for data sharing in this work and became the framework used in developing a grid computing environment. The advancement of grid computing technology has been reviewed in this work. We discuss our work in developing a virtual reality model, installing University of Indonesia Access Grid Node (UI AGN), and creating a VRML design. We also conducted the performance evaluation of the system. Finally, our performance evaluation shows that during the data sharing mechanism using access grid, the average number of packets sent per second is between 8.979518 < mu < 9.298282 for uploading process and the average number of packets received 25.16244 < mu; < 28.78776 for downloading process

This technical report presents detail of the evaluation methodology used for researching the use of 3D for UML state machine diagrams. The methodology is derived from a user centred design approach called &quot;Sequential Evaluation&quot;, which has been applied in the past to immersive virtual reality environments. This technical report first provides background into 3D for UML, then background into 3D

Nucleation of corrosion cracking is analyzed by acoustic emission-simplified Green&#x27;s functions for moment tensor analysis, by which crack kinematics of locations, types and orientations are quantitatively determined. These kinematical outcomes are obtained as 3D locations and ...

Virtual Reality Modeling Language (VRML) is widely used to represent, create, and display virtual reality objects and their environment. Some VRML applications require concurrent interaction by multiple users in a real-time dis- tributed fashion. Such applications need a method for users to share and update the VRML objects in real-time. To al- low concurrent shared real-time access, our approach is

In this study, we conducted evaluation experiments by semantic differential method to examine the validity of utilizing three-dimensional (3D) computer graphic images made with virtual reality modeling language (VRML) as a stimulus for landscape assessment both in the laboratory and on the Internet. The results of the laboratory experiment and the Internet experiment were compared. In both experiments, we simulated

... nology here, and multimedia artists and developers would do well to investigate the sophisticated ... T[y/o]pographic text reveals the inter-play between typography and topography as the ... and their allusions to an oscillation of viewpoints, evoke the interplay between VRML&#x27;s 2D on ...