ScienceDaily: Engineering and Construction News |
- 3-D printing finds its 'sweet spot' through 'nifty shades of gray'
- Bottling up sound waves: Acoustic bottle beams hold promise for imaging, cloaking, levitation and more
- No-power Wi-Fi connectivity could fuel Internet of Things reality
- New material allows for ultra-thin solar cells
| 3-D printing finds its 'sweet spot' through 'nifty shades of gray' Posted: 04 Aug 2014 05:21 PM PDT A 'less is more' approach has enabled engineers to make 3-D printed parts lighter and stronger, using methods that will also make 3-D printing faster and more economical. |
| Posted: 04 Aug 2014 12:15 PM PDT Researchers have developed a technique for generating acoustic bottles in open air that can bend the paths of sound waves along prescribed convex trajectories. These self-bending bottle beams hold promise for ultrasonic imaging and therapy, and acoustic cloaking, levitation and particle manipulation. |
| No-power Wi-Fi connectivity could fuel Internet of Things reality Posted: 04 Aug 2014 10:42 AM PDT Engineers have designed a new communication system that uses radio frequency signals as a power source and reuses existing Wi-Fi infrastructure to provide Internet connectivity to battery-free devices. |
| New material allows for ultra-thin solar cells Posted: 04 Aug 2014 03:59 AM PDT Extremely thin, semi-transparent, flexible solar cells could soon become reality. Scientists have managed to create a semiconductor structure consisting of two ultra-thin layers, which appears to be excellently suited for photovoltaic energy conversion. Several months ago, the team had already produced an ultra-thin layer of the photoactive crystal tungsten diselenide. Now, this semiconductor has successfully been combined with another layer made of molybdenum disulphide, creating a designer-material that may be used in future low-cost solar cells. |
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