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Category: Civil Engineering

Recycled tires create stronger concrete

Obinna Onuaguluchi, UBC civil engineering postdoctoral researcher. Credit: Clare Kiernan / UBC UBC engineers have developed a more resilient type of concrete using recycled tires that could be used for concrete structures like buildings, roads, dams and bridges while reducing landfill waste. The researchers experimented with different proportions of recycled tire fibres and other materials used in concrete—cement, sand and water—before finding the ideal mix, which includes 0.35 per cent tire fibres, according to researcher Obinna Onuaguluchi, a postdoctoral fellow…

Applications of (pin)trace data – Hacker Noon

Suman Karumuri | Pinterest tech lead, Visibility To ensure we’re providing a fast experience for Pinners, we’re constantly improving the request latency of our backend services. Earlier this year, we open sourced Pintrace collector, and contributed the code to the OpenZipkin community. In a previous post, we explained the architecture of Pintrace and how we trace backend applications. In addition to using Pintrace to understand and improve the latency of our backend, we’ve developed applications of trace data to solve…

Getting to Know Shawn Zandi

Before joining LinkedIn in 2012, Shawn worked as a network consultant and architect for various Fortune 100 companies from Dubai to Silicon Valley, building infrastructure for universities, hospitals, airports, luxury hotels, plain old dial-up service providers, and mega-scale data centers.   What are some of the coolest projects that you and your team have been working on? Currently, we are working on the concept of self-defined networking. Self-defined networking is a series of out-of-the-box features and functionalities that enables a…

Engineering Extreme Event Forecasting at Uber with Recurrent Neural Networks

At Uber, event forecasting enables us to future-proof our services based on anticipated user demand. The goal is to accurately predict where, when, and how many ride requests Uber will receive at any given time. Extreme events—peak travel times such as holidays, concerts, inclement weather, and sporting events—only heighten the importance of forecasting for operations planning. Calculating demand time series forecasting during extreme events is a critical component of anomaly detection, optimal resource allocation, and budgeting. Although extreme event forecasting…

Scaling Beyond MySQL – Wealthfront Engineering Blog

Wealthfront is growing fast, and the quantity of data we collect is growing faster. With the launch of Path, we’ve seen a large increase in the number of non-Wealthfront accounts our customers have linked over time (see below). We have plans to increase the breadth of automated financial advice we provide for our clients, so we’re expecting to see the number of linked accounts accelerate. On top of this, we have an ever-growing set of financial services we offer, giving…

Evolving the Netflix Data Platform with Genie 3 – Netflix TechBlog – Medium

by Tom Gianos The big data space continues to change at a rapid pace. Data scientists and analysts have more tools than ever at their disposal whether it be Spark, R, Presto, or traditional engines like Hive and Pig. At Netflix the Big Data Platform team is responsible for making these tools available, reliable and as simple as possible for our users at massive scale. For more information on our overall architecture you can see our talks at QCon 2016,…

Counting things, a lot of different things…

Back in April we announced Rate Limiting of requests for every Cloudflare customer. Being able to rate limit at the edge of the network has many advantages: it’s easier for customers to set up and operate, their origin servers are not bothered by excessive traffic or layer 7 attacks, the performance and memory cost of rate limiting is offloaded to the edge, and more. In a nutshell, rate limiting works like this: Customers can define one or more rate limit…

Oregon city approves permit for US’ first all-wood high-rise

This Nov. 15, 2016, file photo shows a piece of cross-laminated timber, or CLT , in Portland, Ore. City officials in Portland have approved a construction permit for the first all-wood high-rise building in the nation. The building uses the new technology called cross-laminated timber that tests have shown can withstand the worst earthquakes. Developers worked with scientists at Portland State University and Oregon State University to prove through testing that the materials meet all building and fire safety codes.…

Drivers bewildered by twisting Chinese interchange

Five suspended levels and cars going in all directions: a new highway interchange is driving motorists to tears, as they find themselves lost in a concrete maze resembling a plate of spaghetti. Five suspended levels and cars going in all directions: a new highway interchange is driving motorists to tears, as they find themselves lost in a concrete maze resembling a plate of spaghetti. After eight years of construction, the Huangjuewan interchange was completed last week on the outskirts of…

A Distributed Simulation Service – Netflix TechBlog – Medium

By Satyajit Thadeshwar, Mayank Agarwal, Sangeeta Narayanan & Kevin Lew Hundreds of models of smart TVs, game consoles, mobile devices, and other video streaming devices get shipped with a Netflix app pre-installed. Before shipping these devices, manufacturers need to have the app certified on their device firmware. Certification involves running a series of tests that validate the behavior of the Netflix app under different positive & negative scenarios, and this process is repeated each time a new model of a…