RNM
Les radionucléides présents dans l’air, se déposent sur les sols et les sédiments, migrent dans les chaînes alimentaires et peuvent atteindre l’homme. Les particules et les gaz radioactifs présents dans l’air délivrent une dose à l’homme par irradiation externe, mais également par irradiation interne pour les particules inhalées (aérosols). La radioactivité actuelle de l’environnement résulte de la présence de « radionucléides naturels » présents sur la Terre depuis sa création et de « radionucléides artificiels », introduits par l’homme à partir du milieu du 20ème siècle ; certains de ces radionucléides ayant la double origine, naturelle et anthropique.
4 Great Core Exercises To Help Flatten Your Abs « Don't Eat Dirt
Everyone wants flatter abs, and a lot of people try to “spot reduce” by doing ab exercises to try to get them. The problem is, you aren’t going to lose fat from your midsection by doing 1,000 crunches. It’s just not going to happen.
Two Great ‘n Simple Nerdy Pranks To Play On Friends & Enemie
Science has proven that nearly every single human possesses a sadistic side. I totally agree – few things work better to brighten up your day than a prank with friends or colleagues. Today we’re focusing on two simple nerdy pranks. We’ll start by laying out two basic rules – to ensure some special effects. The first one, never do half work, which applies for both of us. Work on the details, the finishing touch is often as important as the basics.
Runt Of The Web
The Absolute Best Of Tumblr With over 150 million blogs, Tumblr is quickly becoming the center of the Internet’s universe. And this universe is full of hilarious discussion threads, weird photo, and the other bubbling irregularities you’d expect from the LiveJournal of 2014. For your enjoyment, the absolute best of Tumblr: Swipe or use ← and → keys to navigate List View
Is Traditional Media Dead?
We talk a lot about the digital revolution that traditional media is being put through: upheaval, readership and audience shrinkage, bankruptcy, pay walls… What's the situation really like? Traditional media are not dead — not yet, and not for a while at least. They're not all as strong as they've once been, but they still occupy an important place in the media landscape.
Floating Magnetic Table is Repellent
When I saw the Float I wanted to grab it and start twisting the cubed faces like some kind of gigantic, wooden Rubik’s cube. Sadly, that’s not possible, not least because all the pieces are the same color: wood. The reality of this table, though, is somewhat cooler than Ernő Rubik’s brain-frying puzzle. Inside that box of 64 blocks is an arrangement of magnets and cables. The magnets, embedded in the wooden bricks, repel each other and push the blocks apart. The cables stop everything from falling apart.
