Laser-Induced Breakdown Spectroscopy of silicon was performed using a nanosecond pulsed frequency

doubled Nd:YAG (532 nm) laser. The temporal evolution of the laser ablation plumes in air at atmospheric

pressure and at an ambient pressure of ∼10−5 mbar is presented. Electron densities were determined from

the Stark broadening of the Si (I) 288.16 nm emission line. Electron densities in the range of 6.91×1017 to

1.29×1019 cm−3 at atmospheric pressure and 1.68×1017 to 3.02×1019 cm−3 under vacuum were observed.

Electron excitation temperatures were obtained from the line to continuum ratios and yielded temperatures

in the range 7600–18,200 K at atmospheric pressure, and 8020–18,200 K under vacuum. The plasma

morphology is also characterized with respect to time in both pressure regimes

Astin, JS

Cowpe, JS

Hill, AE

Pilkington, RD

English

arXiv

In this paper we present a framework for the rendering of dynamic 3D virtual environments which can be integrated in the development of videogames. It includes methods to manage sounds and particle effects, paged static geometries, the support of a physics engine and various input systems. It has been designed with a modular structure to allow future expansions. We exploited some open-source state-of-the-art components such as OGRE, PhysX, ParticleUniverse, etc.; all of them have been properly integrated to obtain peculiar physical and environmental effects. The stand-alone version of the application is fully compatible with Direct3D and OpenGL APIs and adopts OpenAL APIs to manage audio cards. Concluding, we devised a showcase demo which reproduces a dynamic 3D environment, including some particular effects: the alternation of day and night infuencing the lighting of the scene, the rendering of terrain, water and vegetation, the reproduction of sounds and atmospheric agents.\u

Catanese, Salvatore

Ferrara, Emilio

Fiumara, Giacomo

Pagano, Francesco

CogPrints Cognitive Sciences Eprint Archive

Rendering of 3d Dynamic Virtual Environments

Cognitive Sciences ePrint Archive

Emilio Ferrara

Salvatore Catanese

Giacomo Fiumara

Francesco Pagano

Crossref

Rendering of 3D Dynamic Virtual Environments

In this paper we present a framework for the rendering of dynamic 3D virtual environments which can be integrated in the development of videogames.
It includes methods to manage sounds and particle effects, paged static geometries, the support of a physics engine and various input systems.
It has been designed with a modular structure to allow future expansions.

We exploited some open-source state-of-the-art components such as OGRE, PhysX, ParticleUniverse, etc.; all of them have been properly integrated to obtain peculiar physical and environmental effects.
The stand-alone version of the application is fully compatible with Direct3D and OpenGL APIs and adopts OpenAL APIs to manage audio cards.

Concluding, we devised a showcase demo which reproduces a dynamic 3D environment, including some particular effects: the alternation of day and night influencing the lighting of the scene, the rendering of terrain, water and vegetation, the reproduction of sounds and atmospheric agents

S. Catanese

E. Ferrara

G. Fiumara

F. Pagano

AIR Universita degli studi di Milano

A framework for designing 3d virtual environments.

Terrain texture compositing by blending in the frame-buffer.

Laser-Induced Breakdown Spectroscopy of silicon was performed using a nanosecond pulsed frequency doubled Nd:YAG (532 nm) laser. The temporal evolution of the laser ablation plumes in air at atmospheric pressure and at an ambient pressure of ∼ 10- 5 mbar is presented. Electron densities were determined from the Stark broadening of the Si (I) 288.16 nm emission line. Electron densities in the range of 6.91 × 1017 to 1.29 × 1019 cm- 3 at atmospheric pressure and 1.68 × 1017 to 3.02 × 1019 cm- 3 under vacuum were observed. Electron excitation temperatures were obtained from the line to continuum ratios and yielded temperatures in the range 7600-18,200 K at atmospheric pressure, and 8020-18,200 K under vacuum. The plasma morphology is also characterized with respect to time in both pressure regimes. © 2008 Elsevier B.V. All rights reserved

Cowpe, J. S.

Astin, J. S.

Pilkington, R. D.

Hill, A. E.

The University of Manchester - Institutional Repository