Packing Moons Inside the Earth

Sculpting the earth from inside out.

Powerful motions deep inside the planet do not merely shove fragments of the rocky shell horizontally around the globe—they also lift and lower entire continents

UHE and EHE neutrino induced taus inside the Earth

Tau neutrinos interacting inside the Earth produce τ leptons which thereafter can decay inside the atmosphere. The propagation of extremely energetic ντ ’s and τ ’s through the Earth is studied by means of a detailed Monte Carlo simulation, taking into account all major mechanisms of ντ interactions and τ energy loss as well as decay modes. The rates of τ ’s emerging from the Earth are determin...

Position based physics animating and packing spheres inside polyhedra

Dynamics of Distant Moons of Asteroids

solar perturbations dominate. Since the detailed mass distribution within the asteroid is relatively unimportant in We introduce a new analytic method for treating the orbital motions of objects about asteroids and planets. For an asteroid this regime, orbits about one asteroid are similar to those following a circular path around the Sun, we rewrite Jacobi’s about another as long as the eccent...

Microrheology with modulated optical nanoprobes (MOONs)

Metal-capping of one hemisphere of a nano or microparticle breaks the particle’s optical symmetry, allowing its orientation to be tracked using fluorescence and reflection. Tracking orientation and rotation allows the torques acting on the particles be inferred. In addition to serving as rotational nanoviscometers these probes report on local Brownian, magnetic and biomechanical torques. r 2005...