radio waves

Weather, waves and wireless, Super strength signalling

harminka — Fri, 16 May 2008 10:34:58 -0500

A new study from the University of Leicester has discovered a particular window of time when mobile signals and radio waves are ‘super strength’ – allowing them to be clearer and travel greater distances, potentially interfering with other systems.

New discovery at Jupiter could help protect Earth-orbit satellites

harminka — Tue, 11 Mar 2008 00:59:46 -0500

Radio waves accelerate electrons within Jupiter’s magnetic field in the same way as they do on Earth, according to new research published in Nature Physics this week. The discovery overturns a theory that has held sway for more than a generation and has important implications for protecting Earth-orbiting satellites.

Scientists identify origin of hiss in upper atmosphere

harminka — Thu, 06 Mar 2008 01:36:19 -0600

Scientists have solved a 40-year-old puzzle by identifying the origin of the intense radio waves in the Earth's upper atmosphere that control the dynamics of the Van Allen radiation belts — belts consisting of high-energy electrons that can damage satellites and spacecraft and pose a risk to astronauts performing activities outside their spacecraft.

Nano-sized detector turns radio waves into music

harminka — Thu, 18 Oct 2007 12:42:23 -0500

Researchers in California today (Oct. 17) report development of the world’s first working radio system that receives radio waves wirelessly and converts them to sound signals through a nano-sized detector made of carbon nanotubes.

New twist on laser cooling

harminka — Sat, 15 Sep 2007 12:37:34 -0500

Visible and ultraviolet laser light has been used for years to cool trapped atoms—and more recently larger objects—by reducing the extent of their thermal motion.