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Category: Civil Engineering

Nevada experiment mimics earthquakes to test bridge designs

A day after a deadly earthquake struck Mexico City, University of Nevada scientists will mimic quakes to test new bridge designs developed to help the structures better withstand violent temblors. The engineers on Wednesday will rattle a 100-ton, 70-foot (21-meter) bridge model to see how it holds up on a giant contraption in a Reno seismology lab called a “shake table.” Some design work by the engineers has been incorporated into a highway off-ramp under construction in Seattle. It…

Scaling Event Sourcing for Netflix Downloads, Episode 2

by Karen Casella, Phillipa Avery, Robert Reta, Joseph Breuer In the first episode of this series of posts, we introduced the Netflix downloads project and the use cases that led us to consider a solution based on the event sourcing pattern. In this post, we provide an overview of the general event sourcing pattern and how we applied it to some of these key use cases. A Flexible Dilemma When we first started to design the downloads licensing service, the content…

Infrastructure update: evolution of the Dropbox backbone network

Dropbox global backbone network topology In our previous post, we provided an overview of the global edge network that we deployed to improve performance for our users around the world. We built this edge network over the last two years as part of a strategy to deliver the benefits of Magic Pocket. Alongside our edge network, we launched a global backbone network that connects our data centers in North America not only to each other, but also to the edge…

Modelling a city’s minuscule changes

Using a combination of satellite imagery and computer modelling, the Zhu team can predict buildings’ deformations at the millimeter scale. This image shows deformation estimates around the Las Vegas Convention Center. Credit: Xiaoxiang Zhu and the SiPEO team, Technical University of Munich By using 3D models, computational scientists can create precise, static representations of a city. However, cities, much like living things, are almost always in motion. Major construction projects—from new buildings to public transportation infrastructure—seismic events, or shoddy construction…

Will Data Destroy Democracy?

Lawrence Lessig, Roy L. Furman Professor of Law and Leadership, Harvard Law School and Darren Bolding, CTO, Cambridge Analytica Moderator: Matthew Prince, Co-Founder & CEO, Cloudflare Photo by Cloudflare Staff MP: If there’s one person responsible for the Trump presidency, it seems there is a compelling argument that that might be you. DB: I very much disagree with that. MP: How does Cambridge Analytica work, and how did the Trump campaign use it to win the presidency? DB: we take…

A Cloud Without Handcuffs

Brandon Philips, Co-Founder & CTO, CoreOS, and Joe Beda, CTO, Heptio, & Co-Founder, Kubernetes Moderator: Alex Dyner, Co-Founder & COO, Cloudflare Photo by Cloudflare Staff We’re exploring increasing risk of few companies locking in customers gaining more power over time. AD: I want to hear your stories about how you got into what you do. JB: Kubernetes faced problem of either having googlers use rbs or bring X to rest of world. We wanted to have Googlers and outside people…

Making Mobile Faster than Fixed Line

Cole Crawford, Founder & CEO, Vapor IO, and Chaitali Sengupta, Consultant, Qualcomm Datacenter Technologies Moderator: Michelle Zatlyn, Co-Founder & COO, Cloudflare Photo by Cloudflare Staff CC: moved between private and public sector. CS: her company added 100 million customers in India. MZ: Let’s start with where we are today: trends or things you’re seeing in the marketplace that weren’t there 5 years ago. CC: What’s interesting is combination of data mass and data velocity, resulting in a more dynamic internet.…

Getting to Know Shivam Sharma

Shivam is an engineering intern with our Sales Solutions team, which focuses on delivering innovative products for sales people who want to leverage their networks to enable social selling. Specifically, his team is working on the redesign and re-architecture of the Sales Navigator product on the new Pemberly technical stack. Shivam is currently pursuing his bachelor’s degree in computer science at the University of California, San Diego. What are some of the coolest projects that you and your team have…

Autoscaling based on request queuing – Square Corner Blog – Medium

Modern web development often includes traffic-heavy web applications and APIs. These services are tasked with a double-whammy: they need to be able to do a ton of work and to be able to do it for a significant number of requests. For example, a single application can be responsible for user authentication, request routing, view rendering (both HTML and JSON), business logic, and accessing data from a permanent data store [1]. Being able to do that and respond to high…