Rae A. Earnshaw

Fractals and chaos

This volume brings together a number of distinctive contributions in the areas of fractals, chaos, and the interrelationship between the two domains. These contributions cover a wide variety of application areas, and this indicates the extent to which fractals and chaotic phenomena are being studied in the various disciplines. It is anticipated that the interdisciplinary nature of the subject will increase, which in turn will yield useful information on the potential (and also limitations in some cases) of fractals and chaos as modeling tools for the investigation of various natural and scientific phenomena. It is hoped that an understanding of fractals and chaos will lead to a common basis for examining the growth, development, organization, and behaviour of complex dynamical systems, many of which make up the natural world of which we are part. It is anticipated that the investigations of fractal structure associated with phase portraits will be an exciting area for future work.

An introductory guide to scientific visualization

Scientific visualization is concerned with exploring dataand information insuch a way as to gain understanding andinsight into the data. This is a fundamental objective ofmuch scientific investigation. To achieve this goal,scientific visualization utilises aspects in the areas ofcomputergraphics, user-interface methodology, imageprocessing, system design, and signal processing.This volume is intended for readers new to the field and whorequire a quick and easy-to-read summary of what scientificvisualization is and what it can do. Written in a popularandjournalistic style with many illustrations it willenable readers to appreciate the benefits of scientificvisualization and how current tools can be exploited in manyapplication areas. This volume is indispensible forscientists and research workers who have never usedcomputer graphics or other visual tools before, and whowish to find out the benefitsand advantages of the newapproaches.

Theoretical foundations of computer graphics and CAD

Contents: Data Structures and Computer Graphics.- Geometric Algorithms.- Drawing Algorithms.- Theory, Specification, Verification and Formal Methods.- Geometry and Robotics.- Hardware and Architectures.- Curves, Contours and Surfaces.- Modelling and CAD/CAM.- Image Generation and Reconstruction.- Graphic Systems.- Human Computer Interface and Design.- Image Processing and Graphics. Authors include: J.E. Bresenham, U. Cugini, D.P. Dobkin, J.D. Foley, A.R. Forrest, H. Fuchs, L.J. Guibas, P.J.W. ten Hagen, R.J. Lansdown, M.H. Overmars, T. Paulidis, M.L.V. Pitteway, H. Samet, W. Strasser, J.V. Tucker.

Motion control of virtual humans

The article surveys virtual humans and techniques to control the face and body. It also covers higher level interfaces for direct speech input and issues of real-time control.

Applications of Fractals and Chaos

We may not be able to make you love reading, but applications of fractals and chaos will lead you to love reading starting from now. Book is the window to open the new world. The world that you want is in the better stage and level. World will always guide you to even the prestige stage of the life. You know, this is some of how reading will give you the kindness. In this case, more books you read more knowledge you know, but it can mean also the bore is full.

Automatic Generation of Non-Verbal Facial Expressions from Speech

Speech synchronized facial animation that controls only the movement of the mouth is typically perceived as wooden and unnatural. We propose a method to generate additional facial expressions such as movement of the head, the eyes, and the eyebrows fully automatically from the input speech signal. This is achieved by extracting prosodic parameters such as pitch flow and power spectrum from the speech signal and using them to control facial animation parameters in accordance to results from paralinguistic research.

Shadow Mapping for Hemispherical and Omnidirectional Light Sources

In this paper we present a shadow mapping technique for hemispherical and omnidirectional light sources using dual-paraboloid mapping. In contrast to the traditional perspective projection this parameterization has the benefit that only a minimal number of rendering passes is needed during generation of the shadow maps, making the method suitable for dynamic environments and real time applications. By utilizing programmable features available on state-of-the-art graphics cards we show how the algorithm can be efficiently mapped to hardware.

Guest Editors' Introduction: Discovering the Unexpected

The marriage of computation, visual representation, and interactive thinking supports intensive analysis. The goal is not only to permit users to detect expected events, such as might be predicted by models, but also to help users discover the unexpected—the surprising anomalies, changes, patterns, and relationships that are then examined and assessed to develop new insight. The Guest Editors discuss the key issues and challenges associated with discovering the unexpected, as well as introduce the articles that make up this Special Issue.

Expanding the Frontiers of Visual Analytics and Visualization

The field of computer graphics combines display hardware, software, and interactive techniques in order to display and interact with data generated by applications. Visualization is concerned with exploring data and information graphically in such a way as to gain information from the data and determine significance. Visual analytics is the science of analytical reasoning facilitated by interactive visual interfaces. Expanding the Frontiers of Visual Analytics and Visualization provides a review of the state of the art in computer graphics, visualization, and visual analytics by researchers and developers who are closely involved in pioneering the latest advances in the field. It is a unique presentation of multi-disciplinary aspects in visualization and visual analytics, architecture and displays, augmented reality, the use of color, user interfaces and cognitive aspects, and technology transfer. It provides readers with insights into the latest developments in areas such as new displays and new display processors, new collaboration technologies, the role of visual, multimedia, and multimodal user interfaces, visual analysis at extreme scale, and adaptive visualization.

Human-centered computing, online communities, and virtual environments

This report summarizes results of the first EC/NSF joint Advanced Research Workshop, which identified key research challenges and opportunities in information technology. The group agreed that the first joint research workshop should concentrate on the themes of human-centered computing and VEs. Human-centered computing is perceived as an area of strategic importance because of the move towards greater decentralization and decomposition in the location and provision of computation. The area of VEs is one where increased collaboration should speed progress in solving some of the more intractable problems in building effective applications.