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Category: Mechanical Engineering

2017 Pinterest Engineering intern projects – Pinterest Engineering – Medium

Every summer Pinterest welcomes a new class of software engineering interns to our San Francisco HQ. Each intern (or Pintern, as we say) works on an important technical project that directly impacts our product. Pinterns demo their projects weekly in front of the whole company at Friday Q&A, hosted by our co-founders and other leaders across Pinterest. In this post you’ll learn about some of this year’s class and what they built during their internship. Caroline Lo | Stanford University,…

Screaming Circuits: Power Distribution – To route, or To Plane

Power distribution, on a PC board, can come in a number of forms. The three most common methods are You can route power and ground. You can use surface layer floods. You can use internal planes. After component positioning, you’ll need to look at power and ground distribution. With a two layer board, your options are limited to individually routing power and ground, or using a polygon fill, also called a flood or pour.For simple, low speed…

Towards better understanding of railway ballast

Amplitude of the displacement field after a train passes on the track. The left-hand figure corresponds to a simulation with homogeneous ballast and the right-hand image to a simulation with heterogeneous ballast. Credit: Lucio de Abreu Corrêa, Laboratoire de Mécanique des Sols, Structures et Matériaux (CNRS/CentraleSupélec) SNCF engineers have been using mathematical models for many years to simulate the dynamic behavior of railways. These models have not been able to take into account large portions of the track have been…

Photocrosslinkable, thermoreversible, type-I collagen bioink for photolithographic printing

Bioprinting of collagen methacrylamide (CMA) scaffolds. Credit: Dr. David Shreiber A group of biomedical engineers from Rutgers, The State University of New Jersey have leveraged a unique combination of properties of methacrylated collagen to demonstrate its potential as a bioink capable of simple, photolithographic printing of 3D scaffolds for tissue engineering and regenerative medicine. Type-I collagen is the most ubiquitous protein in the human body. Chief among the fibril forming collagens, type-I collagen gives many soft tissues strength and structure.…

Autoscaling Pub/Sub Consumers | Labs

Spotify’s Event Delivery system is responsible for delivering hundreds of billions of events every day. Most of the events are generated as a response to a user action, such as playing a song, following an artist or clicking on an ad. All in all, more than 300 different types of events are being collected from Spotify clients. The Event Delivery system is one of the core pillars of Spotify’s data infrastructure since almost all data processing depends, either directly or…

Welcoming Peter Dayan to Uber AI Labs

Zoubin Ghahramani is Uber’s Chief Scientist and head of Uber AI Labs, Uber’s research arm dedicated to artificial intelligence (AI) and machine learning. Below, Ghahramani introduces AI Labs’ newest team member, award-winning neuroscientist Peter Dayan.   Peter Dayan joins Uber AI Labs to help us enhance our transportation solutions with machine learning and AI. We are thrilled to officially welcome Peter Dayan to Uber AI Labs!  One of the world’s most respected researchers in machine learning and computational neuroscience, Peter…

High speed video recording precisely measures blood cell velocity

Nailfold capillary network obtained by new system. Credit: Igor Gurov Scientists from ITMO University created a high-speed video capillaroscopy system that enables direct measurement of red blood cell velocity. Coupled with sophisticated software, the system can improve the accuracy of vascular condition assessment. Such a system could be useful for monitoring the efficiency of certain therapies. The results of the research were published in Optics and Lasers in Engineering. Capillaroscopy systems are commonly used either to determine the shape and…

Go, don’t collect my garbage

Not long ago I needed to benchmark the performance of Golang on a many-core machine. I took several of the benchmarks that are bundled with the Go source code, copied them, and modified them to run on all available threads. In that case the machine has 24 cores and 48 threads. CC BY-SA 2.0 image by sponki25 I started with ECDSA P256 Sign, probably because I have warm feeling for that function, since I optimized it for amd64. First, I…

Engineering More Reliable Transportation with ML and AI at Uber

In recent months, Uber Engineering has shared how we use machine learning (ML), artificial intelligence (AI), and advanced technologies to create more seamless and reliable experiences for our users. From introducing a Bayesian neural network architecture that more accurately estimates trip growth, to our real-time features prediction system, and even our own internal ML-as-a-service platform, Michelangelo, these two fields are critical to supporting Uber’s mission of developing reliable transportation solutions for everyone, everywhere. Among other areas, we use ML to…

Netflix at AWS re:Invent 2017 – Netflix TechBlog – Medium

by Jason Chan Netflix is excited to be heading back to Las Vegas for AWS re:Invent at the end of the month! Many Netflix engineers and recruiters will be in attendance, and we’re looking forward to meeting and reconnecting with cloud enthusiasts and Netflix OSS users. We’re posting the schedule of Netflix talks here to make it a bit easier to find our speakers at re:Invent. We’ll also have a booth on the expo floor, so please stop by and…