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This book is the formal proceedings of the Eurographics Workshop on Design, Specifi cation and Verification ofInteractive Systems, DSV-IS'99, which was held at the Uni versity of Minho, Braga, Portugal from June 2 to June 4, 1999.

(The programme committee and external reviewers are listed following the contents pages.) In this new review process, all submissions and reviews were handled electronically, with the ex ception of videos submitted with a few of the papers.

Does modelling, formal or otherwise, play a role in designing interactive systems? This development poses a significant challenge to modelling approaches used for the design of interactive systems.

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The papers in this proceedings contain new research results in the areas of Finite-Element and Monte-Carlo illumination algorithms, image-based render ing, outdoor and natural illumination, error metrics, perception, texture and color handling, data acquisition for rendering, and efficient use of hardware.

Making systems easier to use implies an ever increasing complexity in managing communication between users and applications.

The Rendering Workshop proceedings are an obligatory piece of literature for all scientists working in the rendering field, but they are also very valuable for the practitioner involved in the implementation of state of the art rendering system certainly influencing the scientific progress in this field.

The fifth workshop, on Programming Paradigms in Graphics, set out to provide answers and alternatives to the shortcomings of object-oriented graphics. In past Eurographics workshops on Object-Oriented Graphics the prominent trend has been a discovery of the limits of object-orientation in graphics.

This book is the final outcome of the Eurographics Workshop on Design, Specification and Verification of Interactive Systems, that was held in Bonas, from June 7 to 9, 1995.

While in the first workshop in 1993 many concepts in VE were presented, the '95 workshop showed up various applications in different areas and demonstrated quite clearly that Virtual Environments are now used in interactive applications.

Following five successful workshops in the previous five years, the Rendering Workshop is now well established as a major international forum and one of the most reputable events in the field of realistic image synthesis.

The clinical electrophysiology of the human somatosensory cortex was investigated with a combined approach using cortical stimulations and somatosensory evoked responses on electrocorticography, scalp-EEG, and magnetoencephalography. This work studied the spatiotemporal structure of the evoked response with biophysical modeling techniques.

Besides basic and historic aspects the following major topics are covered: "Microchemistry Arts and Archeology" in "Microchemistry in Life Sciences" "Microchemistry Sciences" in Environmental "Microchemistry in Material Sciences" "Instrumentation, Methods and Automation in Microchemistry".

I am convinced that a very important task of experimental medical research is to find applications to the relevant clinical problem as soon as possible, and to avoid distraction by an increasingly over whelming accumulation of new information from all fields of scientific work.

The Second World War gave rise to a previously inconceivable number of peripheral nerve injuries. Besides in most cases the defect of substance is not as great as in war injuries, in which the so-called "critical resection length" (Seddon) was the cause of the greatest difficulties and consti tuted the crucial obstacle to good success.

Das vorliegende Bueh ist ein NaehfoIger des Buehes "Da8 Internationale Map8Y8tem und die Kritik 8eine8 Au/baus". Ein soIcher Untertitel ware heute naeh der weltwoitcn Annahme des Systems Internationalcr Einheiten nieht mehr gerechtfertigt, weil or als negative EinsteHung zu diesem System aufgefaBt werden konnte. Man kann aber die Vorteile, die das SI der Wirtschaft, Technik und Wissenschaft bringt, gar nicht iiberschatzen, ist jetzt doch eine Sprache gebchafi'en worden, die jeder versteht und die weitestgehend MiBverstandnisse ausschaltet. Nieht von ungerahr bedient sich das neue System del' Ausdrueksweise del' GroBenlehre, denn es war nur quasi als me­ trisehe Kronung dieser Disziplin mogHch geworden. Eine aufkliirende Durchleuch­ tung und Beurteilung des Systems muB daher aueh von der GroBenlehre ausgehcn, und so ist der neue Untertitel ent~tanden. Der Verfasser wollte damit aHerdings nicht nur das SI als reife Frucht del' GroBen­ lehre bestiitigen, sondern den Leser anregen, das neue Gebaude nieht nur zu be­ wohnen, sondern fiir dessen Erhaltung und Verschonerung das Verstandnis zu schafi'en. Und dazu sind doch wieder kritische Obedegungen notwendig, die es ermog­ lichen sollen, Entwieklungen del' Zukunft, die sich heute schon abzeiehnen, zu ver­ stehen und in die riehtigen Bahnen zu lenken.