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Category: Mechanical Engineering

New Russian jet takes to air in bid to rival Airbus and Boeing

Russian Prime Minister Dmitry Medvedev in front of the new MC-21 medium-haul jet, which has made a successful test flight, during its roll-out ceremony last June Russia on Sunday held a successful test flight of its new MC-21 medium-haul passenger jet that it hopes will revive its troubled civil aviation industry and challenge giants Airbus and Boeing. The plane, whose prototype was unveiled last June, flew for 30 minutes at a height of 1,000 metres and a speed of 300…

Spinnaker Orchestration – Netflix TechBlog – Medium

Author: Rob Fletcher When the Spinnaker project first started more than two years ago we implemented Orca — Spinnaker’s orchestration engine µservice — using Spring Batch. It wasn’t an entirely unreasonable fit at the time. It gave us atomic, compartmentalized units of work (tasks in a Spinnaker pipeline), retry semantics, the ability to define branching and joining workflows, listeners that could get notified of progress and many other things we needed. However, in the long run, that choice—and our implementation on top of it—imposed…

Jupiter: A high-performance job-matching service | Engineering Blog | Facebook Code

As part of the engineering workflow — writing, editing, testing, and shipping code — we rely on backend services and machines to do a variety of jobs, such as building new packages, installing dependencies, and running tests. At Facebook’s scale, the number and variety of jobs engineers need to execute every day can build up and become a bottleneck in the system. Our goal is to minimize the amount of time engineers spend waiting on machines so that they can…

Join Us at the 10th Annual Hadoop Summit /…

We’re excited to co-host the 10th Annual Hadoop Summit, the leading conference for the Apache Hadoop community, taking place on June 13 – 15 at the San Jose Convention Center. In the last few years, the Hadoop Summit has expanded to cover all things data beyond just Apache Hadoop – such as data science, cloud and operations, IoT and applications – and has been aptly renamed the DataWorks Summit. The three-day program is bursting at the seams! Here are just…

Under the hood: Photo Search | Engineering Blog | Facebook Code

Today, the volume of photos taken by people with smartphone cameras challenges the limits of structured categorization. It is difficult for one person to categorize their own repository of smartphone photos, much less to define a structured taxonomy for everyone’s photos. On Facebook, people share billions of photos every day, making it challenging to scroll backward in time to find photos posted a few days ago, let alone months or years ago. To help people to find the photos they’re…

World’s first demonstration of multicolor 3-D in vivo imaging using ultra-compact Compton camera

The Compton camera only weighs 580g and is palm-sized, making it the world most compact medical gamma-ray detector. Credit: Waseda University As represented by conventional radiograph, radiological images provide only black and white figures in 2D space. The situation is basically the same for Single photon emission tomography (SPECT) and positron emission tomography (PET), which are the two most common molecular imaging techniques used in nuclear medicine. PET is used especially for early cancer and Alzheimer’s disease detection, but radioactive…

Celebrating Research Excellence at LinkedIn

At LinkedIn, our data scientists and researchers have the opportunity to work with massive amounts of data, solve real problems for our members around the world, and publish at major conferences. They work to improve the relevance of our products, contribute to the open source community, and routinely produce outstanding research. If you’re a regular reader of this blog, you already know about the outstanding research done by LinkedIn’s Analytics, Data Science, and Relevance teams. Occasionally, though, we are lucky…

ParlAI: A new software platform for dialog research | Engineering Blog | Facebook Code

One of the long-term goals in AI is to develop intelligent chat bots that can converse with people in a natural way. Existing chat bots can sometimes complete specific independent tasks but have trouble understanding more than a single sentence or chaining subtasks together to complete a bigger task. More complex dialog, such as booking a restaurant or chatting about sports or news, requires the ability to understand multiple sentences and then reason about those sentences to supply the next…

How Etsy Ships Apps – Code as Craft

In which Etsy transforms its app release process by aligning it with its philosophy for web deploys Anchors Aweigh Deploying code should be easy. It should happen often, and it should involve its engineers. For Etsyweb, this looks like continuous deployment. A group of engineers (which we call a push train) and a designated driver all shepherd their changes to a staging environment, and then to production. At each checkpoint along that journey, the members of the push train are…

Detroit and San Diego Data Centers expand Cloudflare network to 26 North American cities

Cloudflare is excited to announce deployments in Detroit (Michigan) and San Diego (California), which are our 114th and 115th data centers respectively. They join Colombo, Sri Lanka and Cape Town, South Africa in the cohort of four new cities added just this week to our growing global network, which spans 57 countries and counting. For over 6 million Internet properties, we now serve customer traffic from across 26 North American cities, including 22 in the United States alone. We’re not…