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Category: Construction Engineering

A blueprint for Solar Decathlon success

Mizzou’s winning Solar Decathlon team is Margaret Jordan, Janee Thompson, Megan Wahlquist, Professor Michael Goldschmidt, Jessica Blankinship and Brandon Smeets. For Megan Wahlquist, the moment of triumph wasn’t the award presentation. It wasn’t when she and her cohorts deftly answered every question from the panel of judges. It wasn’t even the round of congratulatory handshakes from industry professionals. It was the moment of silence. “They ran out of questions for us,” says Wahlquist, a junior from Fair Grove, Missouri. “That…

Using industrial waste to produce carbon neutral alternatives

A pozzolan quarry in Guatemala where large quantities of volcanic ash are added to cements in order to reduce CO2 emissions. Credit: Herbert Pöllmann/MLU Producing cement takes a heavy toll on our climate: Around eight per cent of annual global carbon dioxide emissions can be attributed to this process. However, the demand for cement continues to rise. A team of geoscientists from Martin Luther University Halle-Wittenberg (MLU) has found a way to produce more environmentally friendly and sustainable alternatives. In…

Cloudflare architecture and how BPF eats the world

Recently at Netdev 0x13, the Conference on Linux Networking in Prague, I gave a short talk titled “Linux at Cloudflare”. The talk ended up being mostly about BPF. It seems, no matter the question – BPF is the answer. Here is a transcript of a slightly adjusted version of that talk. At Cloudflare we run Linux on our servers. We operate two categories of data centers: large “Core” data centers, processing logs, analyzing attacks, computing analytics, and the “Edge” server…

Listening, Planning, and Setting Ourselves Up For Growth – Wayfair Tech Blog

When it comes to mobile platforms, Wayfair has multiple end user focused apps across iOS and Android, with over 100 engineers working on them. As the recently appointed lead of the App Team here at Wayfair, I chose to ask fairly generic yet consistent questions upon my arrival to get the lay of the land. These questions included: What are your team’s challenges? What are the opportunities? What should my focus be? What is there to like at Wayfair? What…

New dual-cavity design emits more single photons that can carry quantum information at room temperature — ScienceDaily

MIT researchers have designed a way to generate, at room temperature, more single photons for carrying quantum information. The design, they say, holds promise for the development of practical quantum computers. Quantum emitters generate photons that can be detected one at a time. Consumer quantum computers and devices could potentially leverage certain properties of those photons as quantum bits (“qubits”) to execute computations. While classical computers process and store information in bits of either 0s or 1s, qubits can be…

How Slack Hires a Red Team (and you can too!) – Several People Are Coding

What is a pentest or a red team? Before we go any further, we should define our terms, though you may find they’re often used interchangeably: Pentest: A penetration test, colloquially known as a pentest, attempts to use attacker methods to assess the exploitability, number, and impact of vulnerabilities so the target organization can remediate. It’s often thought of as a test of the technical controls of a security program. Red Team: A red team, by contrast, is not entirely…

Entering the Corporate World – Wayfair Tech Blog

Becoming a software engineer isn’t always straightforward or the same for each person; careers in the industry can start at any point in your working life, backed by a variety of studied disciplines or work experience. We know that good software engineers don’t always take the traditional path into development, which is why we’ve created Wayfair Labs. Wayfair Labs helps kick-start the careers of software developers hoping to join our full-stack and mobile software engineering teams. It’s a twelve week…

How we optimized Magic Pocket for cold storage

Ever since we launched Magic Pocket, our in-house multi-exabyte storage system, we’ve been continuously looking for opportunities to improve efficiency, while maintaining our high standards for reliability. Last year, we pushed the limits of storage density by being the first major tech company to adopt SMR storage. In this post, we’ll discuss another advance in storage technology at Dropbox: a new cold storage tier that’s optimized for less frequently accessed data. This storage runs on the same SMR disks as…

Parasitoid wasps may turn spiders into ‘zombies’ by hacking their internal code — ScienceDaily

Setting off a startling chain of events, a parasitoid wasp can force a spider to weave a special web to suspend the wasp pupa just before it finishes killing its spider host. William Eberhard, staff scientist emeritus at the Smithsonian Tropical Research Institute and Marcelo Gonzaga at the Universidade Federal de Uberlândia in Brazil have assembled wide-ranging evidence that ‘zombification’ involves hacking existing web-spinning mechanisms by hijacking the spider’s own molting hormone, ecdysone. In a new paper published in the…

Improving The Learner Experience With Real-Time Subscription Renewals

Dalton is a software engineering intern on Coursera’s Growth Monetization team. He is from Toronto and studies Software Engineering at the University of Waterloo. He chose to do an internship at Coursera because he believes in their mission of creating a world in which anyone, anywhere, can transform their life by accessing the world’s best learning experiences. This article is about the work he did to improve Coursera’s subscription renewal system. Background What Is a Specialization? One of Coursera’s educational…