Proper selection of capillary tube it is essential to study the effect of capillary tube geometry on the performance of refrigeration systems. The literature review is focused on the influence of geometrical parameters like tube length, diameter, coil pitch, number of twist and twisted angle on pressure drop and coefficient of performance (COP) of the system. These parameters can be optimized u...

This and the accompanying paper present an overview of the face and body animation object in the MPEG-4 Version 2 standard. The MPEG-4 standard includes the representation, compression of virtual human models and their interface with other MPEG-4 objects, with bitrate requirements as low as 1 Kbit/second. In this paper we give an overview of geometrical modeling techniques for the FBA object, a...

Quantitative structure-property relationship (QSPR) models for the flash points of 758 organic compounds are developed using geometrical, topological, quantum mechanical and electronic descriptors calculated by CODESSA PRO software. Multilinear regression models link the structures to their reported flash point values. We also report a nonlinear model based on an artificial neural network. The ...

Although considerable achievement has been made to the development of methods of extracting 3D geometrical information of objects from a scene, there are still major difficulties to visualize complex objects into descriptive CAD models. This paper introduces a new framework for rapid 3D modeling for complex planar objects which would enable automated material handling and semiautomated equipmen...

We use semantic web technology to utilize the world wide web for a large-scale ubiquitous hybrid location model, in order to achieve shareability and extensibility. Our intention is to model location and user characteristics, in order to realize location aware applications with focus on situated user interaction and pedestrian navigation. We present the ubiquitous symbolic location model UbisWo...

The image segmentation plays an important role in medical image processing. Many segmentation algorithms exist. Most of them produce raster data which is not suitable for further 3D geometrical modeling of tissues. In this paper, a vector segmentation algorithm based on an adaptive Delaunay triangulation is proposed. Triangular meshes are used to divide an image into several non-overlapping reg...

The paper presents LGS, a geometric solver by LEDAS for systems requiring solving of geometric problems with constraints. LGS is presently a stable marketable product, and so the paper focuses on the future of LGS, such as possible development paths and applications to real tasks. Apart from the traditional use in large parametric CAD systems, possibilities for integrating the solver in small C...

This and the accompanying paper present an overview of the face and body animation object in the MPEG-4 Version 2 standard. The MPEG-4 standard includes the representation, compression of virtual human models and their interface with other MPEG-4 objects, with bit rate requirements as low as 1 Kbit/second. In this paper, we give an overview of animation techniques for the FBA object, and in the...

A ray tracing model based on the application of the uniform theory of diffraction (UTD) and geometrical optics (GO) for modeling the propagation in the microcellular urban scenarios has been implemented. This model has been used to analyze the behavior of the rms delay spread while turning a corner in two street-corner environmentsregular and chaflane street corners. The study of the environmen...

Our problem concerns the joint interpretation of UltraSonic and InfraRed measurements provided by a composite proximity sensor, in order to extract geometrical and morphological features of a at target. Neural networks are applied here both for modeling and for classi cation purposes. Physical knowledge of the sensing modalities helps in simplifying the network structure, in order to minimize i...