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Joint talk given during the BrainSTORM session at VUA by Frank van Harmelen and Victor de Boer, with input from Christophe Gueret, Hans Akkermans, Anna Bon.
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Web Alliance for
Regreening in Africa (W4RA)
Frank van Harmelen | Victor de Boer
With input from Christophe Guéret, Hans Akkermans, Anna Bon
Regreening
• Knowledge sharing issues
– Distances between rural communities in Sahel
– Infrastructure and access
• Commonly: no electricity, no computer, no internet
• But: mobile and radio
– Lack of relevant content
• Literacy and education
– Languages
Hans Akkermans e-Biz Innovation course, 22 Sep 2011 2
Aim: integrate Web with mobile
access & voice services
• service development toolbox, field deployment in Africa & make a sustainable business out of it
Hans Akkermans e-Biz Innovation course, 22 Sep 2011 3
Field pilots in Mali
Web-mobile-voice services • Field pilot use cases Mali (to start end 2011):
1. Web-based market info by mobile voice service to radio stations for broadcast
2. m-event field organizer facilities Web-mobile-voice
Hans Akkermans e-Biz Innovation course, 22 Sep 2011 4
Web in Society:
the big picture R&D questions
Hans Akkermans e-Biz Innovation course, 22 Sep 2011 5
• Q1 [immediate]: Can the Web (be made to) mean something for knowledge sharing even under very constraining conditions?
– No internet, no computer, no electricity
– Multitude of languages, levels of literacy
• Q2 [Web future]: Can we have a Web of Speech?
– After all, human communication: talking >> writing
Linked Data without the
Web
Not having the Web != Not sharing data
They would benefit from Linked Data
but they can not use it!
And we don't want a new divide, do we?
Market prices Educational content
1) think de-centralised
Instead: chunks of data served by different peers
2) think small, think micro-servers
Not designed for developing countries Designed for developing countries
433Mhz x86 CPU 256MB of RAM 1GB of flash storage
Can be solar powered Dust proof Affordable
Multi-core fast CPU Gigabytes of RAM Terabytes of disk
3) think vocal
Because not everyone can read and write
SemanticXO
Deploy Linked Data on the XO from OLPC
Voice-based access to Linked
Open Market Data in the Sahel
A Bit of Context:
RadioMarché
Digital Divide
Source: ITU Digital Access Index, World's First Global ICT Ranking
Voice-based services in a rural African context
• Integrate local community radios and mobile ICT for knowledge sharing
• Better support and integrate local languages in voice-based
services
– Development of appropriate speech elements (text-to-
speech and Speech recognition)
• Develop a free and open source toolbox for local developers.
• Investigate self-sustainability
– Develop appropriate business models
– In collaboration with local communities.
Use Case 1
Onno Wassenaar
Context: Web For Regreening in Africa (W4RA)
RadioMarche
Sahel Eco
aggregates
market info
Market info
Radio 1
Radio 2
Radio broadcast
French
Bambara
French
Bomu
Data management
RadioMarche.com
Audio communiqué
• Audio communiqué generated by concatenating prerecorded phrases – Each radio host uses own voice (!)
• Text-to-speech where possible
• Currently only for French
• Audio quality is an issue
Voice XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<vxml version="2.0" lang="en">
<form>
<prompt bargein="false">
Welcome to RadioMarche!
<audio src=“audio/communique_1_bambara.wav"/>
</prompt>
<option dtmf="1" value=“1">Press one for X</option>
<option dtmf=“2" value=“2">Press two for Y</option>
...
</vxml>
Linked Data Prototype
An Outrageous Idea
ClioPatria Linked Data server
Linked Data Cloud
Linked market data
Market data
Voice browser
(Voxeo Evolution)
VoiceXML-to-SPARQL
Web access Voice access
http://purl.org/collections/w4ra/radiomarche/offering_68
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rm: <http://purl.org/collections/w4ra/radiomarche/> . rm:offering_68 a rm:Offering ; rm:com_number "6" ; rm:contact_address "" ; rm:currency "CFA" ; rm:has_communique rm:communique_4f2918bc6a7af ; rm:has_contact rm:Fidel_Kone ; rm:price "450.00" ; rm:prod_com_id "3" ; rm:prod_name rm:product-Graine_de_nere ; rm:quality "Graine propre" ; rm:quantity "120.00" ; rm:store_id "68" ; rm:ts_date_delivered "2012-02-01 10:54:57" ; rm:ts_date_entered "2012-02-01 10:18:27" ; rm:unit_measure "Kg" ; rm:user_id "6" .
Application Browser
+31208080855
+990009369996162208 (Skype VOIP)
<VoiceXML>
*
PHP to SPARQL
Linked market data
DBpedia
GeoNames
Agrovoc
Institute of
Development Studies LOD
Linked market data
Sahel Pluvial Data SemanticXO
Questions?
ICT4D course
w4ra.few.vu.nl
semweb4u.wordpress.com
worldwidesemanticweb.wordpress.com