One Laptop Per Child The Mesh Network Αθανασιάδης Π.Γιάννης

Somebody is finally thinking of the children

Network adapter ● Marvell 88W8388 ● On board ARM 9 processors, ROM & RAM ● b/g radio ● Dual adjustable, rotating diversity antennas ● Self organizing multihop (mesh) ● Use of System on Chip (SoC) wireless adapter

Mesh Networking ● Mesh does not require central hub-like infrastructure ● Wireless mesh works even when board powers off

Green ● Looks green, works green – Fully recyclable ● 5 year life span – Idle power consumption ● Desktop – 80 watts ● Laptop – 20 watts ● OLPC – 1 watt

More green ● Power consumption at about 10% of typical laptop ● The laptop lifetime is 5 years or 2.5 times longer than a typical laptop ● Half the size and weight of a typical laptop ● Goal: not a single XO laptop should end up in a landfill

Power innovations ● Batteries that last 4x longer – Lithium Iron Phosphate (LiFePO 4 ) – Currently at ~ 5hrs, final goal ~10 hours ● Display refresh possible with board powered off – 0.1 watt in grayscale mode ● Wireless mesh works even when board powers off – Mesh does not require central hub-like infrastructure

Linux in the box ● Custom Fedora based distro ● GNOME-based ● Ported applications must follow OLPC HCI guidelines

Sugar, because its sweet!

Sugar ● Activities, not applications ● Interface – Sugar – GNOME based ● Borders + center wheel ● Wheel is also a metaphor for available resources ● Run your own Sugar environment –

Applications ● Word processor – Yes, but does it run Word? ● Paint ● Instant Messaging – XMPP based ● Browser – Firefox/gecko ● Record – stills and video

My compi

Building Content ● Constructionism is a philosophy of education in which children learn by doing and making. – Electronic books created and stored on the school server – Collaborative activities ● IM, Video, Music – E-toys ● Build books with multimedia content ● Think Lego®

Richard Stallman's Four Freedoms ● Freedom 0: The freedom to run the program, for any purpose. ● Freedom 1: The freedom to study how the program works, and adapt it to your needs. ● Freedom 2: The freedom to redistribute copies so you can help your neighbor. ● Freedom 3: The freedom to improve the program, and release your improvements to the public, so that the whole community benefits.

The Open Source Definition 1. Free Redistribution 2. Source Code 3. Derived Works 4. Integrity of The Author's Source Code 5. No Discrimination Against Persons or Groups 6. No Discrimination Against Fields of Endeavor 7. Distribution of License 8. License Must Not Be Specific to a Product 9. License Must Not Restrict Other Software 10. License Must Be Technology-Neutral

How can you help? ● Developers – ● Educators – ● Getting involved – Thanks to Sameer Verma

Το υλικό της παρουσίασης ● Όλο το υλικό θα βρίσκεται στην διεύθυνση: Ευχαριστώ για όλα Αθανασιάδης Γιάννης