Happy pi day

Sat 14 March 2015

[caption id="" align="alignright" width="75" class="zemanta-img"]English: Pi Pie, created at Delft University o... Pi Pie (Photo credit: Wikipedia)[/caption]

On this Pi day, I would like to enumerate all uses of pi I know. There are more (listed here):

(Non-)Related articles

Category: maths Tagged: Pi Day useless, maths


big cloud data

Sun 02 February 2014

[caption id="" align="alignright" width="350"]Français : Big pink cloud Oia Big cloud not computing (Photo credit: Wikipedia)[/caption]

This post should be untitled From cloud computing to big data to fast data.

The previously next big stuff: cloud

computing

[caption id="" align="alignright" width="75"]English: Cloud Computing Image Cloud computing (Photo credit: Wikipedia)[/caption]

Once upon a …

Category: maths Tagged: Apache Hadoop BigData Cloud computing Data mining Forecasting MongoDB NoSQL Platform as a service Software as a service SQL reflections

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Puzzle

Mon 20 January 2014

[caption id="" align="alignright" width="103"]English: New Wikipedia's logo. Famous 3D puzzle (Photo credit: Wikipedia)[/caption]

The question is: what is a puzzle? The answer I prefer is: a riddle whose solution is hard to find but easy to verify. In computer science, it's used to provide proof-of-work and usually implemented through cryptographic …

Category: maths Tagged: Cryptographically Generated Address Domain Name System IPv6 Namecoin Proof-of-work system Protocols reflections maths

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Music reflection: timeline and publications

Sat 18 January 2014

[caption id="" align="alignright" width="350"]English: artificial omni-directional sound sou... sound research material (Photo credit: Wikipedia)[/caption]

I just discover google music timeline. That leads me to several publications from google about music.

I wonder why does google work on music. Google is a commercial company whose business model is based on ads and …

Category: maths Tagged: Business model Google Play Publication search engine Timeline maths music reflections

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music physics: notes

Mon 23 December 2013

Explications here are based on what I've learn thanks to this youtube channel and the related researches (including the famous french documentary series c'est pas sorcier)

sound physics

For this post, we will use the following definitions:

  • a sound: fluid vibration (air, water, ...) that reach our ears
  • a noise: a …

Category: maths

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