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Category: Civil Engineering

Mission to Jupiter’s icy moon confirmed — ScienceDaily

An icy ocean world in our solar system that could tell us more about the potential for life on other worlds is coming into focus with confirmation of the Europa Clipper mission’s next phase. The decision allows the mission to progress to completion of final design, followed by the construction and testing of the entire spacecraft and science payload. “We are all excited about the decision that moves the Europa Clipper mission one key step closer to unlocking the mysteries…

Building the New Uber Freight App as Lists of Modular, Reusable Components

As Uber Freight marked its second anniversary, we went back to the drawing board to redesign its app. The original carrier app was successful for owner-operators with one or two drivers, but it wasn’t optimized for larger fleets—feedback we were hearing directly from our carrier base. It let carriers find and move freight from point A to point B, but did not support multi-stop loads with multiple pick-ups and drop-offs. On the engineering side, our team was growing in size.…

Building a universal search system for Pinterest – Pinterest Engineering

Zhongxian Chen | Pinterest Tech Lead, Search On Pinterest, the best answer goes beyond text, but can even go beyond an image too. When you’re looking for eye makeup ideas for example, a video personalized to your skin tone range teaching you how to create a certain look is likely more useful than a Pin showing what the end result looks like. If you’re sprucing up your backyard and looking for lighting ideas, an expert on backyard lighting to follow…

Network functions at Cloudflare scale

Today we announced Cloudflare Magic Transit, which makes Cloudflare’s network available to any IP traffic on the Internet. Up until now, Cloudflare has primarily operated proxy services: our servers terminate HTTP, TCP, and UDP sessions with Internet users and pass that data through new sessions they create with origin servers. With Magic Transit, we are now also operating at the IP layer: in addition to terminating sessions, our servers are applying a suite of network functions (DoS mitigation, firewalling, routing,…

Introducing Pinqueue3.0, Pinterest’s next-gen content moderation platform

By James Man | Trust & Safety Engineering In 2016, we reached a milestone of launching Pinqueue2.0, which has since become the go-to content moderation tool for the engineering, community, and data science teams. One of our top priorities at Pinterest is fostering a safe and trustworthy experience for all Pinners. As Pinterest’s user base and ads business grow, the review volume has been increasing exponentially, and more content types require moderation support. To solve greater engineering and operational challenges…

Performance @Scale 2019 recap – Facebook Code

Developing apps and services that scale to millions or billions of people can present uniquely complex performance challenges. Optimizing infrastructure, scaling web services, and developing fast mobile apps are all part of the job to keep large-scale systems performant. At this year’s event, attendees gathered to hear speakers from Facebook, Google, NVIDIA, and other companies discuss innovative solutions for large-scale systems. If you missed the event, you can view recordings of the presentations below. If you are interested in future…

Performance @Scale 2019 recap – Facebook Engineering

Developing apps and services that scale to millions or billions of people can present uniquely complex performance challenges. Optimizing infrastructure, scaling web services, and developing fast mobile apps are all part of the job to keep large-scale systems performant. At this year’s event, attendees gathered to hear speakers from Facebook, Google, NVIDIA, and other companies discuss innovative solutions for large-scale systems. If you missed the event, you can view recordings of the presentations below. If you are interested in future…

Unifying visual embeddings for visual search at Pinterest

Andrew Zhai | Pinterest Tech Lead, Visual Search Throughout the years, Pinterest has launched a variety of visual search products powered by computer vision to help people discover new ideas to try and products to buy. We started in 2015 with our visual cropping tool, allowing users to search within a Pin’s image (for example a lamp in a larger living room scene) and browse visually-similar content on Pinterest. In 2017, we launched Lens camera search, opening up Pinterest’s visual…

88 percent decline of big freshwater animals — ScienceDaily

Rivers and lakes cover just about one percent of Earth’s surface, but are home to one third of all vertebrate species worldwide. At the same time, freshwater life is highly threatened. Scientists from the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and international colleagues have now quantified the global decline of big freshwater animals: From 1970 to 2012, global populations of freshwater megafauna declined by 88 percent — twice the loss of vertebrate populations on land or in the…

Migrating Functionality Between Large-scale Production Systems Seamlessly

A common axiom among Uber engineers states that building new features is like fixing a car’s engine while driving it. As we scaled up to our present level of support for 14 million trips per day, the car in that axiom got upgraded to a jet airliner. The truth is, with global operations in over 700 cities and people depending on us for transportation and earnings, there is no downtime. New features and system upgrades must go into a production…