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Journée mondiale du Pi et Journée internationale des mathématiques – 14 mars

Pour bien comprendre cette journée, il faut se souvenir de son origine anglo-saxonne: la « Pi-day ». Les dates en anglais se lisent « à l’envers » (n’est-il pas ?) et le 14 mars devient 03/14, soit à peu près 3.14…

Pi-day

Il n’en n’a pas fallu plus pour que des mathématiciens facétieux aient l’idée de célébrer le nombre Pi précisément en ce jour !

La journée des matheux

la journée consacrée au nombre pi donne l’occasion aux matheux de tous horizons et autres amoureux des sciences de déclarer leur amour au nombre pi.

Comme chacun le sait (ou ne le sait pas !), le nombre pi représente le rapport entre la circonférence d’un cercle et son diamètre.

Vous suivez toujours ?

On enseigne généralement 3,14 comme valeur approchée de pi, et c’est souvent suffisant pour les calculs. Les bons élèves s’évertuent à retenir 3.141592. Mais comme Pi est un nombre irrationnel, les décimales ne s’arrêtent pas là et ne finiront jamais par se répéter.

Connaitre le plus de chiffres après la virgule fait l’objet de concours, et des ordinateurs arrivent maintenant à en calculer plus de 12 000 milliards (en 2013). On pense même qu’on peut trouver n’importe quelle suite de nombres dans ces décimales.

La Journée internationale des mathématiques

C’est une nouvelle journée promulguée par l’UNESCO en novembre 2019. Le choix de la date du 14 mars ne doit rien au hasard comme nous avons pu le lire plus haut. (40C/ Résolution 30).

Une meilleure connaissance des mathématiques et un renforcement de leur enseignement seraient essentiels pour faire face aux défis posés par l’intelligence artificielle, le changement climatique, l’énergie et le développement durable, rien de moins. Mais pour bien saisir les enjeux, le plus simple est de visiter le site de l’organisme.

Un site à visiter : fr.wikipedia.org    Source: Texte & Image: Journée Mondiale

World Cancer Day and PI – 4 February

World Cancer Day image_O12v2_93191919

On February 4th, World Day focuses on two health problems: Cancer and PI

World Cancer Day is the one singular initiative under which the entire world can unite together in the fight against the global cancer epidemic. It takes place every year on 4 February. World Cancer Day aims to save millions of preventable deaths each year by raising awareness and education about cancer, and pressing governments and individuals across the world to take action against the disease.

UICC (Union for International Cancer Control) continues to expand on the success and impact of the day and is committed to ensuring that year-on-year the event is seen and heard by more people around the world. We do this through working directly with our members to develop a campaign that serves their differing organisational priorities; this is achieved through a two-pronged strategic approach:

UICC provides support through the development of tools and guidance to encourage its member organisations to run local cancer awareness campaigns that are aligned and adapted to the global World Cancer Day message. On an above-country level, we work to secure and support digital, traditional and social media opportunities to raise public awareness of the day. Through the continued support of our membership and key partners, World Cancer Day is beginning to firmly cement itself in calendars across the world.
To learn more about World Cancer Day, please visit the World Cancer Day website.

Source: Text & Image: UICC

THINKZEBRA-300x300

Primary immunodeficiency diseases (PI) are a group of more than 250 rare, chronic disorders in which part of the body’s immune system is missing or functions improperly. While not contagious, these diseases are caused by hereditary or genetic defects, and, although some disorders present at birth or in early childhood, the disorders can affect anyone, regardless of age or gender. Some affect a single part of the immune system; others may affect one or more components of the system.

And while the diseases may differ, they all share one common feature: each results from a defect in one of the functions of the body’s normal immune system. Because one of the most important functions of the normal immune system is to protect us against infection, patients with PI commonly have an increased susceptibility to infection.

The infections may be in the skin, the sinuses, the throat, the ears, the lungs, the brain or spinal cord, or in the urinary or intestinal tracts, and the increased vulnerability to infection may include repeated infections, infections that won’t clear up or unusually severe infections. People with PI live their entire lives more susceptible to infections–enduring recurrent health problems and often developing serious and debilitating illnesses. Fortunately, with proper medical care, many patients live full and independent lives.

Many physicians are taught, when you hear hoofbeats, think horses, not zebras, and focus on the likeliest possibilities to make a diagnosis. However, physicians need to look for the unusual to detect patients with PI.

Source: Text & Image: IDF website

Today, we think of all those who are struggling with cancer, their loved ones, and the medical personnel for whom this multi-faceted disease is a constant challenge.

We remember as well those for whom PI is a very personal condition.