background preloader

Game over, Bitcoin. Long live human-based currencies!

While being a tremendous proof of concept, the distributed cryptocurrency Bitcoin is fundamentally flawed as an alternative money system, critics say. It is now time for truly radical monetarists to build on this technical experiment and move to the next level of the monetary revolution: a truly human-based digital monetary system. Since its launch in 2009, Bitcoin has turned from a crypto-anarchist project into a hype topic in the worldwide web community and beyond. From London’s squats to Berlin’s Kreuzberg neighborhood: not everyone uses Bitcoin, but everyone is talking about it. Bitcoin can be described as a peer-to-peer cryptocurrency, in other words a distributed monetary system that enables anonymous and relatively secure transactions without any centralized authority. Everyone agrees that Bitcoin is an amazing proof of concept from a technical standpoint, and has succeeded in raising much awareness for the current flaws of the monetary system. Which is bad, Felix Salmon says:

Ernest & Celestine - Trailer open money 5 Ways to Support High-Density Retina Displays An interesting point was raised by Brendan Davis in my recent post “Responsive Web Design and Scrollbars: Is Chrome’s Implementation Better?”: are RWD breakpoints affected by high pixel-density screens? The short answer is: no — but we need to delve a little deeper and look at the problems they can cause. What is Retina? “Retina” is Apple’s brand name for double-density screens but other manufacturers are creating similar displays. The technology is used in recent iPhones, iPads, MacBook Pros and other high-end devices. For example, the MacBook Pro 15″ has a resolution of 2,880×1,800 or 220 pixels per inch. Therefore, the device reverts to a standard resolution of 1,440×900 but the additional pixels can be used to make fonts and graphics appear smoother. What’s the Problem? Standard-resolution bitmap images can look blocky on a Retina display. Real-World Usage If you look around the web, you’d be forgiven for thinking everyone has a Retina display. 1. 2. 3. 4. The drawbacks: 5.

Les Etats s'intéressent enfin à la «chose» bitcoin Si on tenait compte de tout ce qui a été écrit sur le bitcoin, on pourrait en conclure que cette monnaie virtuelle née en 2009 s’est imposée comme un phénomène économique majeur. Ce qui est manifestement faux: sur la base des derniers cours, on peut estimer que les 12 millions de bitcoins en circulation actuellement représentent aujourd’hui un peu plus de 7 milliards d’euros. Ce n’est pas négligeable, mais c’est peu si on rappelle par exemple que le PIB de la France dépasse 2.000 milliards d’euros ou que les réserves de change de la Chine en dollars, euros, etc. excèdent maintenant 3.800 milliards de dollars. Le bitcoin reste une goutte d’eau dans la mer. Mais c’est une goutte d’eau qui grossit et qui, surtout, possède des propriétés tout à fait particulières, au point de susciter l’intérêt des banquiers centraux voire des législateurs. publicité Vu avec intérêt aux Etats-Unis…. … et interdit en Chine Comment définir cette «chose»? Peut-être un montage frauduleux Un statut à clarifier

Creating Retina Images for Your Website July 6th, 2012 by Kyle Larson Apple’s newest devices feature the Retina Display, a screen that packs double as many pixels into the same space as older devices. For designers this immediately brings up the question, “What can I do to make my content look outstanding on these new iPads and iPhones?”. First there are a few tough questions to consider, but then this guide will help you get started making your websites and web apps look amazingly sharp with Retina images! Things to Consider When Adding Retina Images The main issue with adding retina images is that the images are double as large and will take up extra bandwidth (this won’t be an issue for actual iOS apps, but this guide is covering web sites & web apps only). Simple Retina Images The basic concept of a Retina image is that your taking a larger image, with double the amount of pixels that your image will be displayed at (e.g 200 x 200 pixels), and setting the image to fill half of that space (100 x 100 pixels).

L’importance du soutien aux monnaies « vraiment » libres Bitcoin démystifie le système monétaire et démontre qu’il peut être pris en main par les citoyens. Mais Bitcoin ne résout pas les vices du modèle actuel. D’autres modèles plus éthiques existent, mais ils ont besoin d’un soutien massif pour accélérer leur développement. Les crypto-monnaies ouvrent le champ des possibles L’un des grand intérêt de Bitcoin, c’est qu’il permet de se poser les bonnes questions sur le fonctionnement monétaire actuel, d’en comprendre ses dysfonctionnements, de faire de l’éducation populaire sur le sujet. Participer au développement de ces nouveaux outils permet de redonner beaucoup d’espoir pour trouver des solutions à ça : Bon, malheureusement, Bitcoin a une répartition monétaire ultra dangereuse, puisque plus ça va, plus il incite à faire tourner des processeurs dans le vide juste pour créer de la monnaie. Des solutions plus éthiques voient le jour Les monnaies libres ont besoin de nos soutiens Pour donner à Ucoin : Pour donner à OpenUdc : Pour en savoir plus :

Blog Dogecoin Open Educational Resources (OER): Resource Roundup Resources by Topic: OER, a part of the global open content movement, are shared teaching, learning, and research resources available under legally recognized open licenses -- free for people to reuse, revise, remix, and redistribute. Why are OER important? High-quality OER can save teachers significant time and effort on resource development and advance student learning inside and outside the classroom. Further, open sharing of resources has the potential to fuel collaboration, encourage the improvement of available materials, and aid in the dissemination of best practices. For more about the potential of OER, check out "5-Minute Film Festival: Why Open Education Matters," by Edutopia's VideoAmy. Getting Started Sharing Resources The nonprofit Creative Commons offers free, easy-to-use copyright licenses that allow you to specify which rights to your works you want to reserve and which rights you'd like to waive. Quality Considerations With all the promise of OER, some challenges remain.