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Paul Merrell

Carakan - By Opera Core Concerns - 0 views

  • Over the past few months, a small team of developers and testers have been working on implementing a new ECMAScript/JavaScript engine for Opera. When Opera's current ECMAScript engine, called Futhark, was first released in a public version, it was the fastest engine on the market. That engine was developed to minimize code footprint and memory usage, rather than to achieve maximum execution speed. This has traditionally been a correct trade-off on many of the platforms Opera runs on. The Web is a changing environment however, and tomorrow's advanced web applications will require faster ECMAScript execution, so we have now taken on the challenge to once again develop the fastest ECMAScript engine on the market.
  • So how fast is Carakan? Using a regular cross-platform switch dispatch mechanism (without any generated native code) Carakan is currently about two and a half times faster at the SunSpider benchmark than the ECMAScript engine in Presto 2.2 (Opera 10 Alpha). Since Opera is ported to many different hardware architectures, this cross-platform improvement is on its own very important. The native code generation in Carakan is not yet ready for full-scale testing, but the few individual benchmark tests that it is already compatible with runs between 5 and 50 times faster, so it is looking promising so far.
Gary Edwards

Duke Engines' incredibly compact, lightweight valveless axial engine - 0 views

  • The Duke engine is an axial design, meaning that its five cylinders encircle the drive shaft and run parallel with it. The pistons drive a star-shaped reciprocator, which nutates around the drive shaft, kind of like a spinning coin coming to rest on a table.
  • The reciprocator's center point is used to drive the central drive shaft, which rotates in the opposite direction to the reciprocator. "That counter-rotation keeps it in tidy balance," says Duke co-founder John Garvey. "If you lay your hand on it while it's running, you can barely detect any motion at all, it's quite remarkable." That's borne out by the video below, where the engine revving doesn't even cause enough vibrations to tip a coin off its side.
  • Instead of cam- or pneumatically-operated intake and outlet valves, the cylinders rotate past intake and outlet ports in a stationary head ring. The spark plugs are also mounted in this stationary ring – the cylinders simply slide past each port or plug at the stage of the cycle it's needed for and move on. In this way, Duke eliminates all the complexity of valve operation and manages to run a five-cylinder engine with just three spark plugs and three fuel injectors. The Duke engine ends up delivering as many power strokes per revolution as a six cylinder engine, but with huge weight savings and a vast reduction in the number of engine parts.
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  • The engine has shown excellent resistance to pre-ignition (or detonation) – potentially because its cylinders tend to run cooler than comparable engines. Duke has run compression ratios as high as 14:1 with regular 91-octane gasoline. This suggests that further developments will pull even more power out of a given amount of fuel, increasing the overall efficiency of the unit.
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    Watch the second video! This is extraordinary. "New Zealand's Duke Engines has been busy developing and demonstrating excellent results with a bizarre axial engine prototype that completely does away with valves, while delivering excellent power and torque from an engine much smaller, lighter and simpler than the existing technology. We spoke with Duke co-founder John Garvey to find out how the Duke Axial Engine project is going."
Paul Merrell

Announcing STARTTLS Everywhere: Securing Hop-to-Hop Email Delivery | Electronic Frontie... - 0 views

  • Today we’re announcing the launch of STARTTLS Everywhere, EFF’s initiative to improve the security of the email ecosystem. Thanks to previous EFF efforts like Let's Encrypt, and Certbot, as well as help from the major web browsers, we've seen significant wins in encrypting the web. Now we want to do for email what we’ve done for web browsing: make it simple and easy for everyone to help ensure their communications aren’t vulnerable to mass surveillance.
  • t’s important to note that STARTTLS Everywhere is designed to be run by mailserver admins, not regular users. No matter your role, you can join in the STARTTLS fun and find out how secure your current email provider is at: https://www.starttls-everywhere.org/ Enter your email domain (the part of your email address after the “@” symbol), and we’ll check if your email provider has configured their server to use STARTTLS, whether or not they use a valid certificate, and whether or not they’re on the STARTTLS Preload List—all different indications of how secure (or vulnerable) your email provider is to mass surveillance.
Paul Merrell

How the GOP muzzled the coalition fighting foreign propaganda on Twitter, Facebook and ... - 0 views

  • A once-robust alliance of federal agencies, tech companies, election officials and researchers that worked together to thwart foreign propaganda and disinformation has fragmented after years of sustained Republican attacks.The GOP offensive started during the 2020 election as public critiques and has since escalated into lawsuits, governmental inquiries and public relations campaigns that have succeeded in stopping almost all coordination between the government and social media platforms.The most recent setback came when the FBI put an indefinite hold on most briefings to social media companies about Russian, Iranian and Chinese influence campaigns. Employees at two U.S. tech companies who used to receive regular briefings from the FBI’s Foreign Influence Task Force told NBC News that it has been months since the bureau reached out. In a testimony last week to the Senate Homeland Security Committee, FBI Director Christopher Wray signaled a significant pullback in communications with tech companies and tied the move to rulings by a conservative federal judge and appeals court that said some government agencies and officials should be restricted from communicating and meeting with social media companies to moderate content. The case is now on hold pending Supreme Court review.“We’re having some interaction with social media companies,” Wray said. “But all of those interactions have changed fundamentally in the wake of the court rulings.”
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