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Category: Mechanical Engineering

Building the Activity Graph, Part I

Co-authors: Val Markovic and Vivek Nelamangala   Serving a feed of relevant, personalized content to 500 million members is a massive undertaking. Accordingly, our feed infrastructure is constantly evolving to take advantage of new relevance models, new features, and more efficient ways of scaling our infrastructure. In this post, we describe the Activity Graph, a new system that allows us to understand deep relationships between members’ content. The origin of the Activity Graph The story of the almost year-long project…

Moving Automated Driving To the Next Level

If there had been a competition for world-class back-seat drivers, my grandmother would have won it hands down.  Back in the 1980s when we were living in Massachusetts, we drove to Boston’s Logan Airport and picked her up for a visit.  Despite never having been closer to New England than Ohio in her entire life, she immediately started telling me which turns to take in downtown Boston as soon as I got lost, which I always did anyway, but without…

Honda to roll out all-new Accord with no V6 option

This photo provided by American Honda Motor Co., Inc. shows the next generation Honda Accord. Honda says its Accord midsize car will be offered only with four-cylinder or gas-electric hybrid engines when an all-new version comes out later in 2017. The company says the smaller engines are sufficient for what its customers want. (Courtesy of American Honda Motor Co., Inc. via AP) Honda said Friday that its Accord midsize car will be offered only with four-cylinder or gas-electric hybrid engines…

Wit and Wisdom of an Engineer: Car Code

  “Twenty years ago, cars had, on average, one million lines of code. The General Motors 2010 Chevrolet Volt had about 10 million lines of code — more than an F-35 fighter jet.   Today, an average car has more than 100 million lines of code. Automakers predict it won’t be long before they have 200 million.” Source link…

Accelerating machine learning for computer vision | Engineering Blog | Facebook Code

Scale matters. This is the lens through which engineers from Facebook, Google, LinkedIn, Microsoft, Pinterest, Uber, and Yandex shared presentations about their approach to tackling technical challenges in large-scale storage systems and analytics at today’s Data @Scale conference in Seattle. Kicking off the conference, Facebook engineer Pieter Noordhuis shared insights from a newly released paper, “Accurate, Large Minibatch SGD: Training ImageNet in 1 Hour.” The paper demonstrates how creative infrastructure design can also contribute to more efficient deep learning at…

New driving-simulator lab accelerates research into driver behavior and vehicle technology

Credit: University of Kansas You’ve driven a car a million times, so nothing here should be too different. Just climb into the Acura, buckle up, throw it in “drive” and stomp on the gas. It’s just like any vehicle, except—whoa! At once familiar and yet fully surreal, taking a spin in the state-of-the-art Driving Simulator Lab in the Department of Civil, Environmental and Architectural Engineering in the University of Kansas’ School of Engineering sets participants into highly realistic driving…

an open source configuration management database

Lida Li & Saurabh Joshi | Pinterest engineers, Cloud Management Platform Pinterest runs its infrastructure on AWS. Every day, thousands of EC2 instances are launched, stopped and terminated because of auto scaling, as well as new service launches and cluster rotation. To serve as a single source of truth for both hardware and software configuration at the host level, we built Soundwave, a configuration management database (CMDB). Soundwave plays a critical part in supporting resource management, service automation, capacity planning,…

200 years of the bicycle—computer scientists electrify historic ‘dandy horse’

Professor Holger Hermanns riding the Dandy Horse, in the background Florian Schiessl, on the right the Belgian bicycle engineer Dries Callebaut. Credit: Oliver Dietze In honor of the inventor, their prototype is still made completely of wood, but it also contains an electric motor, battery, sensors and mini-computer. As soon as the rider pushes off from the ground, the motor starts and provides additional power during the entire ride. With their “Draisine 200.0” the computer scientists are testing the validity…

New millimeter-wave technology could make future vehicles much safer

Millimeter-wave radars covering several tens of meters could be on cars, bikes, and smartphones. This might create a lot of new applications including games. Credit: Hiroshima University Hiroshima University and Mie Fujitsu Semiconductor Limited (MIFS) today announced the development of a low-power millimeter-wave amplifier that feeds on 0.5 V power supply and covers the frequency range from 80 GHz to 106 GHz. It was fabricated using MIFS’s Deeply Depleted Channel (DDC) technology. This is the first W-band (75−110 GHz) amplifier…

Combining MRI and optical microscopy promising for brain research

Meng Cui, at left, a Purdue University assistant professor of electrical and computer engineering, and graduate student Yifeng Zhou, display part of a system that allows the simultaneous use of both a functional MRI and “two-photon microscopy” to study the brain. Credit: Purdue University image/Meng Cui Functional magnetic resonance imaging reveals changes in blood-oxygen levels in different parts of the brain, but the data show nothing about what is actually happening in and between brain cells, information needed to better…