Submitted by IMAGINARY on
If you place a drop of ink into a glass of water, the ink will slowly dissipate into the surrounding water until it is perfectly mixed. If you record your experiment with a camera and play the film backwards, you will see something that is never observed in the real world. Such diffusive and irreversible behaviour is ubiquitous in nature.
Submitted by IMAGINARY on
En mécanique quantique, contrairement à la mécanique classique, il n’est pas possible de faire des prédictions précises quant au comportement d’un système. On est obligé de travailler avec les probabilités. En conséquence, c’est une tâche importante que de déterminer les probabilités de base d’un système donné. Dans cet instantané, nous présenterons un résultat d’unicité récent concernant ces probabilités.
Submitted by IMAGINARY on
A friend of mine, an expert in statistical genomics, told me the following story: At a dinner party, an attractive lady asked him, “What do you do for a living?” He replied, “I model.” As my friend is a handsome man, the lady did not question his statement and continued, “What do you model?” “Genes.” She then looked at him up and down and said, “Mh, you must be very much in demand.” “Yes, very much so, especially after I helped discover a new culprit gene for a common childhood disease.” The lady looked puzzled.
Submitted by IMAGINARY on
The taskbook for school students by renowned Russian mathematician Prof. Vladimir Igorevich Arnold. You can find the original Russian version as well as an English, German, Spanish, Italian, Vietnamese and Turkish translation.
If you are interested to add a new translation, please see the github repository of the booklet for all sources and details.
Submitted by MPE 2013 on
Different models of population dynamics