By Soulskill from Slashdot's does-graphene-even-lift? department
New submitter Dialecticus writes "Sebastian Anthony at ExtremeTech has written an article about research into the physical properties of carbyne, an elusive form of carbon. A new mathematical analysis by Mingjie Liu and others at Rice University suggests that carbyne may achieve double the strength of graphene, stealing its crown and becoming the strongest material known to man. 'While carbyne cannot be stretched, it can be bent into an arc or circle — and by doing so, the additional strain between the carbon atoms alters the electrical bandgap. This property could lead to some interesting uses in microelectromechanical systems (MEMS). By adding different molecules to the end of a carbyne chain, such as a methylene (CH2) group, carbyne can also be twisted — much like a strand of DNA — again adding strain and modifying the electrical bandgap. By "decorating" carbyne chains with different molecules, other properties can be added, too: Tack some calcium atoms on the end, which like to mop up spare hydrogen molecules, and suddenly you have a high-density, reversible hydrogen storage sponge.
It’s also important to note that, just like graphene, carbyne is just one atom thick. This means that, for a given mass of carbyne, its surface area is relatively massive. A single gram of graphene, for example, has a surface area of about five tennis courts. This could be very important in areas such as energy storage (batteries, supercapacitors), where the surface area of the electrode is directly proportional to the energy density of the device.'"Read Replies (0)
By Soulskill from Slashdot's web-apps-aren't-citizens-at-all,-corporations-are department
An anonymous reader writes "This article takes a look at whether web apps will ever match desktop and mobile apps in terms of performance and usability. Jo Rabin, who's leading the push by web standards body W3C to get web app performance up to scratch, is optimistic web apps will eventually be the default choice for building the majority of commercial and business apps, while the article weighs up just how much web technologies need to be improved before this could happen. Quoting: 'Native apps are generally first to gain access to new platform-specific hardware features — be it navigating using a phone's GPS and accelerometer or taking pictures with a phone's camera. But if a particular hardware feature becomes popular, standards to implement that feature in the browser will always follow, Rabin said. Work is taking place within W3C to standardise APIs for web technologies to access many of the features found on modern smartphones. Ongoing work this year includes setting out a system-level API to allow a web app to manage a device's contacts book, a messaging API for sending and receiving SMS and MMS, new mechanisms for capturing photos and recordings, new event triggers that could handle mouse, pen and touch inputs, a new push API to allow web apps to receive messages in the background, new media queries for responsive web design, an API for exchanging information using NFC and precise control over resource loading times in a web document.'"Read Replies (0)