Developing Dynamic Virtual Environments Using Hierarchical, Tree-Structured Approach

A Structured Approach to Evaluate Collaborative Educational Virtual Environments

In this paper we present a 3D collaborative educational virtual environment, which was development by utilizing an iterative applied throughout development cycle. The main propose was demonstrating applicability of an evaluation framework idealized by the authors. Our evaluation framework is supported by the Quantitative Evaluation Framework (QEF) proposed by Escudeiro [3]. This framework uses ...

Tree-Structured Stick Breaking for Hierarchical Data

Many data are naturally modeled by an unobserved hierarchical structure. In this paper we propose a flexible nonparametric prior over unknown data hierarchies. The approach uses nested stick-breaking processes to allow for trees of unbounded width and depth, where data can live at any node and are infinitely exchangeable. One can view our model as providing infinite mixtures where the component...

Hierarchical Radiosity for Dynamic Environments

This paper extends the hierarchical radiosity method to environments in which geometry and surface attributes can be changed dynamically. New algorithms are presented for maintaining an appropriately-sized mesh and speeding the construction of the corresponding linear system. Mesh folding, the unrefinement of a mesh, is used to optimize mesh size while maintaining a specified error tolerance. T...

Enumerating Stereoisomers of Tree Structured Molecules Using Dynamic Programming

Exhaustive enumeration of stereoisomers is one of the most fundamental and important problems in chemoinformatics. In this paper we deal with chemical compounds composed of carbon, hydrogen, oxygen and nitrogen atoms whose graphical structures are tree-like graphs, and consider stereoisomers caused only by asymmetry around carbon atoms. We introduce a mathematical representation for stereoisome...

Developing Intelligent Virtual Environments Using MAM5 Meta-Model