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Category: Civil Engineering

Building with waste and recycled material

Credit: Zooey Braun – Stuttgart A residential module fully constructed from reusable, recyclable, and compostable materials: This is the premise for the newest unit in NEST, the modular research and innovation building run by Empa and Eawag in Dübendorf. On 8 February 2018, the NEST “Urban Mining & Recycling” unit will open its doors and henceforth house two students. At the same time, as an active lab it will also help to advance the construction industry’s transition to a recycling…

Lessons Learned from LinkedIn’s Data Center Journey

I recently had the pleasure of speaking to groups of data center executives and strategists at the DCD Zettastructure conference in Singapore and at the DCD Converged conference in Hong Kong. Putting my thoughts together for these talks gave me a rare chance to step back and reflect on LinkedIn’s amazing infrastructure journey and our accomplishments over the past eight years. Over the last several years at LinkedIn, our steep growth in members, sessions, and engagement has generated an exponential need…

Letting molecular robots swarm like birds — ScienceDaily

A team of researchers from Hokkaido University and Kansai University has developed DNA-assisted molecular robots that autonomously swarm in response to chemical and physical signals, paving the way for developing future nano-machines. The world’s smallest “swarm robot” measures 25 nanometers in diameter and 5 micrometers in length, and exhibits swarming behavior resembling motile organisms such as fish, ants and birds. “Swarm robots are one of the most elusive subjects in robotics,” says Akira Kakugo of the research team at Hokkaido…

Contextual Calendar Reminder: Key to Successful Hosting

By Tao Cui and Yuting Gu Motivation Airbnb’s mission is to create a world where anyone can belong anywhere. So when hosts forget to update their calendars and are booked by guests on dates that don’t work, the host has to cancel the reservation. This definitely does not make the guests feel like they belong. Inaccurate calendars are also detrimental to the business. Being cancelled on is a frustrating experience that makes guests think twice about using Airbnb for a…

Earthquake engineers conduct research on steel collectors

Robert Fleischman and members of his research team stand dwarfed by a test structure built on the shake table at UC San Diego’s Englekirk Structural Engineering Center. Credit: University of Arizona An award-winning team of researchers at the University of Arizona and partnering universities is working to develop buildings that will not collapse under the force of major earthquakes, such as last year’s 7.1-magnitude quake in central Mexico and 7.3-magnitude quake near the Iran-Iraq border. The two earthquakes were the…

Scaling Time Series Data Storage — Part I – Netflix TechBlog – Medium

Introduction The growth of internet connected devices has led to a vast amount of easily accessible time series data. Increasingly, companies are interested in mining this data to derive useful insights and make data-informed decisions. Recent technology advancements have improved the efficiency of collecting, storing and analyzing time series data, spurring an increased appetite to consume this data. However this explosion of time series data can overwhelm most initial time series data architectures. Netflix, being a data-informed company, is no…

Physicists look for ways to protect satellites’ electronic equipment in space

The Department of Micro- and Nano-Electronics at the National Research Nuclear University MEPhI (Russia) has presented a new method of predicting integrated microcircuit failures in outer space. An article on the research has been published by IEEE Transactions on Nuclear Science. Ensuring the reliable operation of microcircuits in outer space is an important scientific and economic objective. For modern weather, communications and surveillance satellites to be cost-effective, they need to be operational for at least 10 to 15 years. Onboard…

Harnessing Code Generation to Increase Reliability & Productivity on iOS at Uber

At Uber, our Android engineers have been using annotation-supported code generation for a few years now. On iOS, we first looked into code generation in fall 2016 when we started work on our new rider app using the RIBs architecture. One of the tenents of our new mobile architecture—reliability at scale—drove us to investigate whether we could use code generation to enhance the reliability of our mobile client and improve the developer experience by removing the need to manually write…

Part 2, Making It Easy – Several People Are Coding

In Part 1 we introduced the targeted and hermetic UI test approach that helped Slack Android engineers write hundreds of stable UI tests. However, as our UI test suite expanded, we detected a problem. When asked how easy it was to write tests on a scale from 1 (terrible) to 4 (excellent), developers ranked it a 2.5 (a resounding “meh”). In fact, the only category that ranked worse was related to build times. As one developer put it — “Writing quality UI…

Server Rendering, Code Splitting, and Lazy Loading with React Router v4

Photo by Matt Duncan on Unsplash “Godspeed those who attempt the server-rendered, code-split apps.” — Ryan Florence, Co-Creator of React Router Challenge accepted. Some Background on Server Rendering at Airbnb Historically, Airbnb has been a Rails app. A few years back that started to change, we began using Rails simply as a data layer, and all render logic started migrating into JavaScript in the form of React. In order to maintain server rendering, we created and open sourced Hypernova, a JavaScript Rendering as a…