Category: Science & Geeks
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Flexible color e-paper displays
I have been checking on e-ink technology for some time, but here is Plastic Logic bringing the best of this technology: Flexible color e-paper. E-paper means that it behave like paper and does not need LED lighting from behind (like the Kindle Paperwhite). Color means that you can do much better than the Kindle Paperwhite…
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Lessons Learned from a new Synology NAS
I rencently proceeded to solve a problem I was observing more and more from my sturdy Synology DS413j (7-year old after all): I ran out of space and the old DS413j has no longer any extension possibility after the four 4TB disks in SHR mode (10.41TB accessible). So, I just bought a shining new (and…
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Pi to one MILLION decimal places
One million useless figures The “most useless page” of this web site shows the first million decimal figures of PI (Do you remember your math? PI=3.14, more or less). All this is a kind of « virtual partnership » with French scientific magazine La Recherche whose December 2005 issue is titled : « Pi, le maître nombre » (Pi, the Master number). There,…
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Test your firewall
Shields up! Shields up! will allow you to test the security of your Internet conection. If you have a firerwall, you will know if it is correctyl configured. If you don’t, you will know what risks you are taking. I invite you to visit the rest of the web site, too. It covers security aspects linked…
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Recover lost files on CD or DVD
When your CD is dying… The observation Updated information (Jan-06):Now, Kurt Gerecke, an expert from IBM Germany, speaks up and tells the awful truth on ComputerWorld: Burned CD and DVD: limited life span around 2-5 years.But he also considers that hard disc drives are no better and advises you to use magnetic tapes. CD-ROM are annonced as…
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My own preferred photos: Wild focus
I know that publishing here on a more or less regular basis my new photos from my own adventures in the wild world is appreciated by some. But I am also asked to come back to older photos or to highlight some of the pictures I prefer. So, I decided to create a kind of…
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Raspberry Pi as a local DNS/DHCP server
For a local network supporting a small company or an Internet-active family, it is always possible to rely totally on an Internet Service Provider (ISP) which will provide basic network services straight from the Internet box/router (fibre or ADSL). But, if – like me – you want to have more flexibility, you’d prefer to setup…
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Crinkle cranckle
Two images that I found both on the excellent TYWKIWDBI blog. You will notice that they are loosely related.
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Battle of the neighboroods
This post is part of a small series of non-university studies (guest posts from enlightened amateurs) on Roumazeilles.net. So, we sometimes welcome a few authors whose works may be of a wider interest or simply original. The work below has been written by Marion Jonchères, in November 2020. Yves Roumazeilles 1. Introduction: Business understanding, target…