Le solaire photovoltaïque plus performant que le pétrole (selon une méta-étude de l'Imperial College London) C'est EROïque.
L'humanité a franchit un cap historique: le taux de retour énergétique (EROI) du solaire PV est à présent meilleur que celui du pétrole. The Fermi Paradox. PDF: We made a fancy PDF of this post for printing and offline viewing.
Buy it here. The 12 most controversial facts in mathematics. OCW Course Index. OpenAI Blog. Exploring and venting about quantitative issues. "Good" Children - At What Price? The Secret Cost of Shame. By Robin Grille and Beth Macgregor / naturalchild.org A five-month-old baby is lying in his mother's arms.
He is close to sleep, then wakes and begins to cry. His mother tells him that he should stop being a naughty boy, and that she will be cross with him if he doesn't sleep. An 18-month-old child is taken to a restaurant with her father and uncle. Her father goes to the bar, leaving the child with the uncle at the table. Ten Awesome Science Courses You Can Take Online For FREE. Science and the Internet are two individual entities that, when combined, become the 21st century’s most powerful educational tool.
If you suddenly feel the urge to know why there’s a supermassive black hole at the center of every galaxy, or if you’re just wondering why you can’t tickle yourself, you can find out in under a minute using just your smartphone. If you’re looking for more than just a brief overview, why not take a look at these online courses by edX? These entirely free lecture series give you a rigorous, entertaining, university-level understanding of a whole bunch of cool scientific subjects. So if you’ve got a thirst for science, one of these courses will certainly quench it. 1 – Human Anatomy Explore the human body via six healthcare professional perspectives. Rue89.nouvelobs. 1350 dingbats - - 1000.dingbats.overblog.com. NASA released 30 minutes of footage of the sun in 4K. Google enregistre tout ce que vous lui dites. Voici comment écouter et effacer vos recherches. Le géant américain agit avec transparence en vous donnant accès aux données qu’il possède sur vous, mais leur stockage suscite néanmoins des questions.
Des millions de personnes utilisent quotidiennement les commandes vocales de leur téléphone Android. Chez Google, le développeur actuel de ce système d’exploitation mobile, on nomme cette fonction OK Google. Elle est l’équivalent Google de Siri, chez Apple. Astrobiology: The Living Universe - Main Page. Astrobiology: The Living Universe is the web's premiere educational resource for astrobiology, featuring in-depth information and interviews on exobiology, planetary biology, the origins of life and human spaceflight.
Our site doesn't end with that however - every single page within this website is also available in an enhanced PDF printable format and we have a network of forums and interactive applets as well as a number of Flash animations. Find out more about the Living Universe >> 30/1/01: We're finally back, and we're working flat-out to update every single page within this website, and not just that but also to ensure that no page is more than one month out of date. 16 of the updated articles are now online, and soon you'll be able to know that you're reading the most comprehensive and up-to-date source of information on Astrobiology on the entire Internet. Expect further news soon... Des villages Cassini aux communes d'aujourd'hui.
Page from Gravity! From the Big Bang to Black Holes - Paris Diderot. Project Apollo Archive. The Rise and Fall of Placebo Medicine. I am just getting back from The Amazing Meeting (TAM9 from Outer Space) – it was awesome but I had no time to blog while there.
One of the events I participated in at TAM was a panel discussion on placebo medicine. We decided to focus on placebos for our science-based medicine panel because it increasingly looks like this will be the front lines for the next phase of the battle against pseudoscience in medicine. I began the panel discussion by declaring victory, of a sorts. Over the last two decades the public and the scientific community have be told by CAM (complementary and alternative medicine) proponents that we were missing out on many potentially very useful and effective medical treatments simply because they are from other cultures or do not fit into the current scientific paradigm.
“Give us the resources to research these diamonds in the rough,” they argued, “and we will give you new tools to promote health.” I agree that negative studies of existing treatments are valuable. BSW-Anti-WiFi-2012-Position-Paper-UPDATED-Jan-27-2013. Hypercomplex Fractals. Here is a 4th order inverse Juliabulb set with 600 million spheres.
The triplex raised to the 4th power has 16 unique valid roots. Garth Thornton was the first person to point out that, in general, the triplex raised to the nth power has n2 unique valid roots. Parasitic Beetle Mimics Ants By “Speaking” Three Different “Languages” Ant colonies act like fortresses, protecting the bounty within from marauding invaders.
Some animals have evolved blunt tools such as large claws to tear into the nests, but others have evolved far more subtle ways that allow them to wander into the colony uncontested. Called “myrmecophily” – literally “ant-love” – many species of insects and plants have evolved associations to live alongside ants, most of which are sympatric (where both species benefit), but some of which are parasitic (where only one benefits at the expense of the other).
One such parasitic association is with what are called ant nest beetles (Paussus). Ants communicate with each other through various complex mechanisms, mainly through smell, but also through sound. It was already known that the ant nest beetles were able to mimic their ant hosts' complex chemical signatures in order to infiltrate the colony. This is not the first time that insects have been found to mimic the sounds of ants to gain acceptance. John Green: The nerd's guide to learning everything online. A Brief History Of Everything, With Neil deGrasse Tyson. Answering Cancer Quackery: The Sophisticated Approach to True Believers. Anisakis090207.pdf. Watch These Famous Landmarks Change Over Time Using "Mined" Tourists' Photos. Been on holiday lately?
Researchers from Google and the University of Washington have created this fascinating video below of famous landmarks changing and disappearing over time, using a whopping 86 million photos uploaded by tourists and travelers onto image-sharing sites. The tourists’ photos were publicly available on Flickr and Picasa, so researchers collated images and assembled them into a mini time-lapse video of each landmark. To counteract filters and lighting effects, the images were color-balanced and warped to show scenes from the same angle. Smarter Every Day. 1502.05256.pdf. Pantheon - Team. Pantheon is a project from the Macro Connections group at The MIT Media Lab. We are a team of designers, engineers, and scientists working collaboratively to quantify, analyze, measure and visualize global culture.
Books worth reading, recommended by Bill Gates, Susan Cain and more. Creativity Creative Confidence, by Tom Kelley and David Kelley Crown Business, 2013 Recommended by: Tim Brown (TED Talk: Designers — think big!) “‘Creative confidence’ is the creative mindset that goes along with design thinking’s creative skill set.”See more of Tim Brown’s favorite books. Einstein Vs Quantum Mechanics ... And Why He’d Be A Convert Today. Albert Einstein may be most famous for his mass-energy equivalence formula E = mc2, but his work also laid down the foundation for modern quantum mechanics. His analysis of the “spookiness” of quantum mechanics opened up a whole range of applications including quantum teleportation and quantum cryptography, but he wasn’t completely convinced by the theory of quantum mechanics – and that story is as fascinating as the theory he attempted to nail down.
Quantum mechanics is downright bizarre. David McCandless: The beauty of data visualization. Information Is Beautiful. FUN - France Université Numérique. How does the thyroid manage your metabolism? - Emma Bryce. For such a tiny organ that looks a lot like a butterfly, the thyroid gets a lot of attention. But it makes sense when you consider just how vital its task is: this gland helps to control the body's metabolism. If you're stuck trying to grasp why that's important and what exactly metabolism is, check out this helpful video, and read more about the thyroid's role here and here. The tools your thyroid uses to get the job done are triiodothyronine (T3) (that's a tricky word: learn how to say it!)
And thyroxine (T4), the two hormones that act as messengers to all your body's cells. Fun fact: your thyroid needs an element called iodine to make these hormones, an ingredient your body can't make and which it has to get from the food you eat, instead. Since it works 24/7, it may seem like the thyroid is the boss in this situation.
Sans titre. Ready to level up your working knowledge of math? Here’s what to read now — and next. Math 101, with Jennifer Ouellette First, start with these 5 books… 1. A Melting Arctic And Weird Weather: The Plot Thickens. Everyone loves to talk about the weather, and this winter Mother Nature has served up a feast to chew on. Few parts of the US have been spared her wrath. Severe drought and abnormally warm conditions continue in the west, with the first-ever rain-free January in San Francisco; bitter cold hangs tough over the upper Midwest and Northeast; and New England is being buried by a seemingly endless string of snowy nor’easters.
Yes, droughts, cold and snowstorms have happened before, but the persistence of this pattern over North America is starting to raise eyebrows. Is climate change at work here? Before public speaking… WolframAlpha : Une nouvelle sorte de science pour une nouvelle sorte de moteur de recherche. Par Rémi Sussan le 03/06/09 | 6 commentaires | 6,463 lectures | Impression Aujourd’hui, vous avez sans doute déjà visité et utilisé WolframAlpha, et, selon vos préférences, vous l’avez trouvé plutôt extraordinaire, ou (surtout si vous êtes peu porté sur les chiffres), globalement décevant. Difficile pour l’instant de juger l’engin, qui n’en est, nous affirme-t-on, qu’à ses débuts (un truc à noter pour les collégiens et lycéens : il donne la solution des équations et trace les courbes de fonctions !).
En revanche, on peut déjà se poser des questions sur sa signification exacte, et se demander si sa naissance constitue ou pas une date mémorable dans l’histoire de l’informatique et dans le domaine de l’intelligence artificielle notamment. L’avenir de la programmation : le langage naturel. Il existe deux types de programmation du langage naturel ; celle qui est effectuée par les grosses compagnies comme IBM et Apple, sur laquelle on ne possède bien souvent que quelques indications, et celle élaborée par les milliers de créateurs, souvent amateurs, de « chatbots » (programmes conversationnels). L’avenir de la programmation : le langage naturel. Vente Terrain Seyssinet-Pariset (38170) 665 m² (136 000 ) 992726507397 992726507397. Index of /Resources. Quantum mechanics 101: Demystifying tough physics in 4 easy lessons.
Ready to level up your working knowledge of quantum mechanics? Check out these four TED-Ed Lessons written by Chad Orzel, Associate Professor in the Department of Physics and Astronomy at Union College and author of How to Teach Quantum Physics to Your Dog. 1. Particles and waves: The central mystery of quantum mechanics One of the most amazing facts in physics is that everything in the universe, from light to electrons to atoms, behaves like both a particle and a wave at the same time.
World's Biggest Data Breaches & Hacks. Les Cast Codeurs Podcast. Rap News 28: The Singularity. Zythom. FLP Vol. I Table of Contents. Bees & Bombs. Beautiful Mathematical GIFs Will Mesmerize You. Digital artist and physics PhD student Dave Whyte is dazzling our computer screens with his mesmerizing GIFs that are the perfect marriage of mathematics and art.
Tableau de bord. Accueil. Tableau de correspondance des leçons avec le niveau scolaire. Les MOOC incontournables de la rentrée. Parmi les innombrables formations en ligne ouvertes à tous (MOOC) qui font leur apparition à la rentrée, Le Monde en a sélectionné une dizaine susceptible de plaire aux étudiants. Découvrir la science politique. Ngram Viewer. Accueil général Geol-Alp.