ScienceDaily: Top Technology News |
- NASA sees the sun having a solar blast
- NASA's Solar Dynamics Observatory catches 'surfer' waves on the sun
- GPS stations can detect clandestine nuclear tests
- Using magnets to help prevent heart attacks: Magnetic field can reduce blood viscosity, physicist discovers
- Engineers look to the birds for the future of unmanned aerial vehicles
- New method to make sodium ion-based battery cells could lead to better, cheaper batteries for the electrical grid
- New data still have scientists in dark over dark matter
| NASA sees the sun having a solar blast Posted: 07 Jun 2011 02:18 PM PDT The Sun unleashed an M-2 (medium-sized) solar flare, an S1-class (minor) radiation storm and a spectacular coronal mass ejection (CME) on June 7, 2011 from sunspot complex 1226-1227. The large cloud of particles mushroomed up and fell back down looking as if it covered an area of almost half the solar surface.  |
| NASA's Solar Dynamics Observatory catches 'surfer' waves on the sun Posted: 07 Jun 2011 02:18 PM PDT Scientists have spotted the iconic surfer's wave rolling through the atmosphere of the sun. The waves hold clues as to how energy moves through that atmosphere, known as the corona. Since scientists know how these kinds of waves -- initiated by a Kelvin-Helmholtz instability if you're being technical -- disperse energy in the water, they can use this information to better understand the corona. This in turn, may help solve an enduring mystery of why the corona is thousands of times hotter than originally expected.  |
| GPS stations can detect clandestine nuclear tests Posted: 07 Jun 2011 01:42 PM PDT At the Comprehensive Nuclear-Test-Ban Treaty Organization meeting, American researchers are unveiling a new tool for detecting illegal nuclear explosions: the Earth's global positioning system (GPS). Even underground nuclear tests leave their mark on the part of the upper atmosphere known as the ionosphere, the researchers discovered, when they examined GPS data recorded the same day as a North Korean nuclear test in 2009.  |
| Posted: 07 Jun 2011 09:15 AM PDT Blood viscosity can be reduced 20-30 percent by subjecting it to a small magnetic field, lowering potential damage to blood vessels and the risk of heart attack, according to a new study.  |
| Engineers look to the birds for the future of unmanned aerial vehicles Posted: 07 Jun 2011 09:11 AM PDT Engineers are mimicking the movement of bird wings to help improve the maneuverability of unmanned aerial vehicles (UAVs). UAVs are often used for surveillance of a fixed target in military and civilian applications. A fixed wing aircraft capable of spot landing on a perch (top of a pole, building, fence, etc.) would be an ideal solution capable of efficient cruising and versatile landing for longer surveillance missions.  |
| Posted: 07 Jun 2011 09:11 AM PDT By adding the right amount of heat, researchers have developed a method that improves the electrical capacity and recharging lifetime of sodium ion rechargeable batteries, which could be a cheaper alternative for large-scale uses such as storing energy on the electrical grid. Researchers have used nanomaterials to make electrodes that can work with sodium.  |
| New data still have scientists in dark over dark matter Posted: 07 Jun 2011 06:45 AM PDT A dark-matter experiment deep in the Soudan mine of Minnesota now has detected a seasonal signal variation similar to one an Italian experiment has been reporting for more than a decade. The new seasonal variation, is exactly what theoreticians had predicted if dark matter turned out to be what physicists call weakly interacting massive particles (WIMPs). WIMPS might have caused the signal variation, but it also might be a random fluctuation, a false reading sparked by the experimental apparatus itself or even some exotic new phenomenon in atomic physics.  |
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