https://www.ted.com/talks/william_kamkwamba_on_building_a_windmill?language=en
the original TED presentation
Do a youtube seach for ram-pump or ram pump
No electrical energy needed, just a water level difference of about 50cm, preferably more.
https://www.raspberrypi.org/blog/rachel-pi-delivering-education-worldwide/
http://rachelfriends.org/rachel-pi-howto.html
text analysis with r :: search terms
https://www.r-bloggers.com/intro-to-text-analysis-with-r/ https://www.tidytextmining.com/ https://kenbenoit.net/pdfs/text_analysis_in_R.pdf https://stackoverflow.com/questions/21218524/text-analysis-using-r https://opensourceforu.com/2017/02/text-mining-with-r/ https://towardsdatascience.com/easy-text-analysis-on-abc-news-headlines-b434e6e3b5b8
I am a big fan of the very cheap but versatile Raspberry Pi's. Thought I remembered an article about R published in the raspberry magazine MagPi. But it was about the Wolfram language that is available for free when used on a raspberry pi. ;-)
Checked the Wolfram documentation and found this for Text Analysis.
For the presentation of your statistical data keep an eye on Grafana.com
Googles Blogger can make a blogspot that is easier than wordpress or sites.google.com.
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Sometimes the internet breaks down. Power outage or beloved leaders that do not want us to communicate.
But our smart phones contain a radio, the WiFi chip is effectively a radio transmitter/receiver. The FireChat app (android and apple) makes use of it and enables chats without the internet - between nearby devices. Please have a good look at their videos and features in the app store.
Back to Rachel-Pi; because it is designed to be used without the internet. It provides a specially curated Wikipedia for learning and other learning sources. Clients = Pupils can access the server because it provides its own WiFi Access Point. Depending on what kind of Raspberry Pi is used simultaneous access of around 6 to 8 for a Raspberry Zero, up to about 20 for a Raspberry 3 should be possible. Total costs around € 125 or lower for the Zero option. The Raspi 3 is rapidly dropping in price because there is a newer Pi 4 on the market now.
