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Category: Computer Engineering

Concrete printing in 3-D will put an end to boring buildings

The only material we use more than concrete is water. Credit: Shutterstock Construction is one of the largest industries in the world economy – worth A$10 trillion globally (equivalent to 13% of GDP). But construction has suffered for decades from remarkably poor productivity compared to other sectors. While agriculture and manufacturing have increased productivity 10-15 times since the 1950s, construction remains stuck at the same level as 80 years ago. That’s because construction remains largely manual, while manufacturing and…

Exploring Ruby 2.6 — Enumerator, Hash, and Enumerable Changes

New features to try in the upcoming ruby-2.6.0-preview3 As we get closer to Christmas, we’re going to see more and more features for Ruby 2.6. Some of them haven’t been discussed much, including Enumerable and Enumerator, and I’ve found those changes particularly interesting. Let’s take a look. Christmas is coming, and with it some fun new presents in Ruby! Enumerable#to_h If you started Ruby in the earlier days, you’re probably familiar with Hash[] and its usage like this: hash = {…

The next era of Bug Bounty at Pinterest – Pinterest Engineering – Medium

Devin Lundberg | Pinterest Tech Lead, Product Security When a security researcher discovers a bug in a piece of software, the responsible thing to do is inform the company so they can fix it. And so platforms like Pinterest need to provide clear and actionable programs, typically with rewards or recognition, for those with valid reports. For us, that’s come in the form of responsible disclosure policies, which we’ve evolved over the years. We work with Bugcrowd to manage the…

Screaming Circuits: The Social Media Net

I kind of like the phrase “the social media net.” I doubt that I actually coined it, but I can’t think of exactly where I may have first heard it. Regardless, a net is one of the things that comes to mind when I think of social media marketing – a “fishing” net, not an “Inter” net. As I’ve said many times before (I do understand that I may not have said it to you, but I have said it…

Screaming Circuits: Signal To Noise Ratio

Signal to noise ratio is a pretty important factor in the world of electronics design, especially in Rf and analog design. Strangely enough, it’s also a critical part of marketing. In many parts of the engineering community, the term “Marketing” essentially has a similar definition as the term “deception.” Point of fact, that is not the definition of the term. But a low signal to noise ratio can make it seem so. Fundamentally, marketing is about getting factual information to…

New finding of particle physics may help to explain the absence of antimatter — ScienceDaily

In the Standard Model of particle physics, there is almost no difference between matter and antimatter. But there is an abundance of evidence that our observable universe is made up only of matter — if there was any antimatter, it would annihilate with nearby matter to produce very high intensity gamma radiation, which has not been observed. Therefore, figuring out how we ended up with an abundance of only matter is one of the biggest open questions in particle physics.…

Scientists and Engineers in Congress After the Recent Elections in the USA » Curious Cat Science and Engineering Blog

Scientists and Engineers in Congress After the Recent Elections in the USA Posted on November 12, 2018  Comments (0) The recent elections in the USA added to those serving in congress with STEM (science, technology, engineering and math) backgrounds. US Capital Building in Washington DC by John Hunter. Here is a list of elected representatives in the USA congress with science, technology, engineering and math backgrounds (after the 2018 election). Name State BS Notes Link Ralph Abraham Louisiana MD bio…

Delivering Meaning with Previews on Web – Netflix TechBlog – Medium

As the Netflix catalog of films and series continues to grow, it becomes more challenging to present members with enough information to decide what to watch. How can a member tell if a movie is both a horror and a comedy? The synopsis and artwork help provide some context, but how can we leverage video previews (trailers) to help members find something great to watch? Our goal was to create a rich and enjoyable video preview experience to give our…

The rise of multivector DDoS attacks

It’s been a while since we last wrote about Layer 3/4 DDoS attacks on this blog. This is a good news – we’ve been quietly handling the daily onslaught of DDoS attacks. Since our last write-up, a handful of interesting L3/4 attacks have happened. Let’s review them. Gigantic SYN In April, John tweeted about a gigantic 942Gbps SYN flood: It was a notable event for a couple of reasons. First, it was really large. Previously, we’ve seen only amplification /…

Engineering Ethics Blog: Aquinas Looks at Bitcoins

On the face of it, it’s hard to think of two more unrelated subjects than St. Thomas Aquinas (1225-1274), the greatest philosopher of the Middle Ages, and bitcoins, the original blockchain-enabled digital currency that has spawned a flock of imitations and variations.  But Aquinas set out some guidelines that can let us at least speculate (so to speak) about what he would say about bitcoins. It’s hard to imagine how different the economy of 1250 A. D. was from today’s…