No pictures yet.

Micro Energy Harvester Using Brownian Motion

I remember a long time a ago I heard of a hypothetical device that can harvest energy from random motion of fluid particles (Brownian motion) using a mechanical device that spins in only one direction. I also remember that it is not possible to build such a device but I dont remember the argument

From cr4.globalspec.com ()

More perspectives...

Articles more »

What comes first: the chicken or the egg? Pattern Formation Models in Biology, Music and Design.

By Dimitris Gourdoukis on | From the-t-machine.blogspot.com

by Katerina Tryfonidou & Dimitris GourdoukisThe popular saying that wonders if the egg is coming before the chicken or vice versa, implies a vicious circle where all the elements are known to us and the one is just succeeding the other in a totally predictable way. In this article we will argue, using arguments from fields as diverse as experimental music and molecular biology, that development in architecture, with the help of computation, can escape such a repetitive motif. On the contrary...Read Full Story

Texas Physicist Observes Brownian Motion, Proves Einstein Wrong By Seeing Instantaneous Velocity of Particles

By Alton Parrish III on | From nanopatentsandinnovations.blogspot.com

A century after Albert Einstein said we would never be able to observe the instantaneous velocity of tiny particles as they randomly shake and shimmy, so called Brownian motion, physicist Mark Raizen and his group have done so. A 5-micrometer glass bead levitated in air by a single laser beam from below. This optical trap is formed by the balance between the scattering force from the laser beam and the gravitational force on the bead. Tongcang Li, et. al. used a similar optical trap to study...Read Full Story

BROWNIAN MOVEMENT

By SHAHAN on | From chemistadeel.blogspot.com

This property first of all observed by British Botanist, Robert Brown in 1827, during the movement of pollen grains in water by microscope .If a drop of liquid with particles suspended in it, is observed under a microscope, it is seen that the particles are not at rest but they are moving in all direction in zig-zag motion. This motion is called as Brownian movement after the name, who observed it. "A continuous, rapid, zig-zag motion of suspended particles through the medium is called...Read Full Story

A Ball Out At Sea

By Munty13 on | From munty13.blogspot.com

I'd like to step back a little and get some background on the current mechanism which science thinks generates heat: the kinetic theory of matter. The kinetic theory of matter states that all matter is made up of atoms and molecules, that these atoms and molecules are in constant motion, and that collisions between these atoms and molecules are completely elastic, and that it's this motion which releases heat. This differs to the darnfangled theory of the aether, where atoms are indeed in...Read Full Story

Cosmogenic drift and stochastic processes

By DrGordonMcCabe on | From mccabism.blogspot.com

I recently proposed an extension to Lee Smolin's theory of cosmological natural selection, which attempts to explain the evolution of a quantum relativistic universe, a necessary precondition for a population of universes evolving by natural selection. I propose that the parameters of physics not only change when a new universe is born, but undergo random diffusion even in universes which cannot initially reproduce. I refer to this process as cosmogenic drift, by analogy with the process of...Read Full Story

Overview

A community portal about Brownian motion with blogs, videos, and photos. According to Wikipedia.org: The term Brownian motion (in honor of the botanist Robert Brown) refers to eithe the physical phenomenon where minute particles, immersed in a fluid or floating on its surface, move about randomly; or the mathematical model used to describe such random movements, often called a Wiener process. The mathematical model can also be used to describe many phenomena not resembling (other than mathematically) the random movements of minute particles. An often quoted example is stock market fluctuations. Another example is the evolution of physical characteristics in the fossil record. Brownian motion is among the simplest continuous-time stochastic processes, and it is a limit of both simpler and more complicated stochastic processes (see random walk and Donsker's theorem). This universality is closely related to the universality of the normal distribution. In both cases, it is often mathematical convenience rather than the accuracy of the models that motivates their use.

Reference Keywords

Ultimate Frisbee