Saturday, June 16, 2012

Energy Harvester Converts Walking Movement Into Gadget Electricity

Gadget of the year?

Hat tip to Chris Sickham at IOIL SciTech
Device powers gadgets through walking

A new wearable "energy harvester" that converts walking body movement into electricity for gadgets was unveiled in Smart Materials and Structures (Wikipedia), July issue, Smart Materials and Structures Volume 21 Number 7, Michele Pozzi et al 2012 Smart Mater. Struct. 21 075023 doi:10.1088/0964-1726/21/7/075023, The pizzicato knee-joint energy harvester: characterization with biomechanical data and the effect of backpack load. The abstract reads:
"Abstract References

Paper

The reduced power requirements of miniaturized electronics offer the opportunity to create devices which rely on energy harvesters for their power supply. In the case of wearable devices, human-based piezoelectric energy harvesting is particularly difficult due to the mismatch between the low frequency of human activities and the high-frequency requirements of piezoelectric transducers. We propose a piezoelectric energy harvester, to be worn on the knee-joint, that relies on the plucking technique to achieve frequency up-conversion. During a plucking action, a piezoelectric bimorph is deflected by a plectrum; when released due to loss of contact, the bimorph is free to vibrate at its resonant frequency, generating electrical energy with the highest efficiency. A prototype, featuring four PZT-5H bimorphs, was built and is here studied in a knee simulator which reproduces the gait of a human subject. Biomechanical data were collected with a marker-based motion capture system while the subject was carrying a selection of backpack loads. The paper focuses on the energy generation of the harvester and how this is affected by the backpack load. By altering the gait, the backpack load has a measurable effect on performance: at the highest load of 24 kg, a minor reduction in energy generation (7%) was observed and the output power is reduced by 10%. Both are so moderate to be practically unimportant. The average power output of the prototype is 2.06 ± 0.3 mW, which can increase significantly with further optimization."
Hat tip to Chris Sickham at IOIL SciTech
Device powers gadgets through walking

Google Spreadsheet Gadgets Reviewed: e.g. the Organization Chart Gadget for Business Management Structures or even Website Design


Helen Bradley at the PCWorld Business Center has a review of 7 Great Google Spreadsheet Gadgets e.g. as she writes, the Organization Chart gadget:

"can create a hierarchical chart showing the design for your website or the management structure of your business":




Google Tablet Launch in July 2012



Google-branded tablet set for July launch – New Tech Gadgets & Electronic Devices | Geek.com: - Sent using Google Toolbar

Monday, May 7, 2012

Friday, March 30, 2012

Lenovo: From the Shadow of IBM into the Sun of the New Number One PC Maker Come Next Year


Chuck Salter at FastCompany.com
reports on the phenomenal rise of China's No. 1 PC seller
Lenovo
in Protect And Attack: Lenovo's New Strategy.

A rave like the following is worth checking out:
"Stateside, Lenovo is best known as the outfit that came out of nowhere to buy IBM's PC division and ThinkPad brand in 2005....
Lenovo is a company the likes of which we've never seen. It is a product of Communist China (the government still owns 36% of its parent, Legend Holdings).... Lenovo is redefining "Made in China," producing the industry's highest-quality machines; it ranked No. 1 in the 2011 Computer Reliability Report, ahead of Apple and HP...." [emphasis added]
The Wikipedia has the following graph at Market share of leading PC vendors:

Global PC Market Share - 2006-2011



Global PC Market Share by Units, Percent. 2006-2011.
Rank 2006 [2] 2007 [3] 2008 [4] 2009 [5] 2010 [6] 2011 [7]
1 Dell 15.9 HP 18.2 HP 18.4 HP 19.3 HP 17.9 HP 17.2
2 HP 15.9 Dell 14.3 Dell 14.3 Acer 13.0 Dell 12.9 Lenovo 13.0
3 Lenovo 7.0 Acer 8.9 Acer 11.1 Dell 12.2 Acer 12.0 Dell 12.1
4 Acer 5.8 Lenovo 7.4 Lenovo 7.2 Lenovo 8.1 Lenovo 9.7 Acer 11.2
5 Toshiba 3.8 Toshiba 4.0 Toshiba 4.5 Toshiba 5.1 Toshiba 5.4 ASUS 5.9
Others
51.6
47.1
44.5
42.3
42.1
40.7

In 2009 Lenovo had a global PC market share of 11.2% less than HP, in 2010 a market share of 8.2% less than than HP and in 2011 a market share of 4.2% less than HP, so that if that furious trend continues, Lenovo should reach a global top market share early in the year 2013, if not sooner.

Lenovo can send us one of their new PCs or notebooks for review at any time. We will try it out and compare it to the Lenovo we already have, the desktop B510 IdeaCentre, a terrific desktop PC at an unbeatable price.
This is not an ad. It is our honest opinion.


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