When waves -- regardless of whether light or sound -- collide, they overlap creating interferences. Austrian and Canadian quantum physicists have now been able to rule out the existence of higher-order interferences experimentally and thereby confirmed an axiom in quantum physics: Born's rule.
Country: NETHERLANDS -
Download date: 2010 08 16 21:58 -
Post date: 16-08-2010 05:26
- Organisation: AcademicTransfer
- Research Fields: Agricultural sciences
A new mathematical model of human throwing action suggests that current thinking about the biomechanical origin of error is wrong
Here's a straightforward question. Imagine you are throwing a ball into a bin. Are you better off using an overarm or an underarm throw?
Optics normally treats the behaviour of packages of light waves (photons). However, when passing through appropriately shaped fields, particles may behave similar as photons. A beam of electrons that is not too dense will under such conditions behave similar to light beams that pass comparable lenses. In a dense beam the electrons will influence each others path via their own Coulomb field.
The idea of using mechanical resonators as mass sensors is an old one, and one that may be explained to a first-year physics undergrad. The (angular) frequency of a mass on a simple Hooke's Law spring is (k/m)0.5, where k is the spring constant.
As I get ready to teach honors mechanics to first-year undergrads, I have been scouting the web for various resources. I ran across the complete series run of The Mechanical Universe (streaming for residents of the US and Canada), a great show that I remem
Self-assembly of complex structures is commonplace in biology but often poorly understood. In the case of the actin cytoskeleton, a great deal is known about the components that include higher order structures, such as lamellar meshes, filopodial bundles, and stress fibers.
Proper tension maintenance in the cytoskeleton is essential for regulated cell polarity, cell motility, and division. Non-muscle myosin IIB (NMIIB) generates tension along actin filaments in many cell types, including neuronal, cardiac, and smooth muscle cells.
By using a highly sensitive technique of atomic force microscopy-based single-cell compression, the rigidity of cultured N2a and HT22 neuronal...
The development of cardiac hypertrophy in response to increased hemodynamic load and neurohormonal stress is initially a compensatory response that...