ScienceDaily: Top Technology News |
- Improving materials that convert heat to electricity and vice-versa: Turning waste heat into electricity
- Tiny magnets as a model system
- Some 'green' hot water systems fail to deliver on promises, study shows
| Posted: 05 May 2013 11:59 AM PDT Thermoelectric materials can be used to turn waste heat into electricity or to provide refrigeration without any liquid coolants, and new study has found a way to nearly double the efficiency of a particular class of them that's made with organic semiconductors.  |
| Tiny magnets as a model system Posted: 05 May 2013 11:58 AM PDT In the microscopic world, everything is in motion: atoms and molecules vibrate, proteins fold, even glass is a slow flowing liquid. And during each movement there are interactions between the smallest elements – for example, the atoms – and their neighbors. To make these movements visible, scientists have developed a special model system. It is so big that it can be easily observed under an X-ray microscope, and mimics the tiniest movements in Nature. The model: rings made from six nanoscale magnetic rods, whose north and south poles attract each other. At room temperature, the magnetization direction of each of these tiny rods varies spontaneously. Scientists were able to observe the magnetic interactions between these active rods in real time.  |
| Some 'green' hot water systems fail to deliver on promises, study shows Posted: 01 May 2013 04:29 PM PDT A new research paper reports that hot water recirculating systems touted as "green" actually use both more energy and water than their standard counterparts.  |
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