Practical Physics

Practical Physics

Practical Physics for Articulated Characters

This presentation describes a set of techniques for implementing a fast and stable dynamics simulator for articulated characters using an analytical constraint approach combined with Featherstone’s linear-time forward dynamics algorithm. It presents an efficient method for enforcing multiple simultaneous constraints on an articulated character in order to control the character’s motion and mode...

Physics, Technology and Practical Considerations

Screen-film image receptors have been the standard detector used in conventional mammography. New developments in detector technology and computers are altering the landscape of mammography imaging. Full Field Digital Mammography (FFDM) offers the promise of revolutionizing the practice of mammography through its superior dose and contrast performance. Advanced applications made possible throug...

Statistical Physics and Practical Training of Soft–Committee Machines

Equilibrium states of large layered neural networks with differentiable activation function and a single, linear output unit are investigated using the replica formalism. The quenched free energy of a student network with a very large number of hidden units learning a rule of perfectly matching complexity is calculated analytically. The system undergoes a first order phase transition from unspe...

Active Climate Stabilization: Practical Physics-Based Approaches to Prevention of Climate Change

We offer a case for active technical management of the radiative forcing of the temperatures of the Earth’s fluid envelopes, rather than administrative management of atmospheric greenhouse gas inputs, in order to stabilize both the globaland timeaveraged climate and its mesoscale features. We suggest that active management of radiative forcing entails negligible – indeed, likely strongly negati...