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Engineering News

Saudi Arabia opens high-speed railway to public

Passengers walk on the platform at Mecca train station on October 11, 2018 as Saudi Arabia’s new high-speed railway opens Saudi Arabia’s new high-speed railway opened to the public on Thursday, whisking Muslim pilgrims and other travellers between Mecca and Medina, Islam’s holiest cities. The Haramain High Speed Rail system will transport passengers 450 kilometres (280 miles) via the Red Sea port of Jeddah at speeds of up to 300 kilometres per hour. Two trains, each carrying 417 passengers,…

Simple fabrication of full-color perovskite LEDs

The schematic illustration of overall procedure and optical properties of anion-exchanged perovskite nanocrystals. Credit: UNIST A next-generation optical material based on perovskite nanoparticles can achieve vivid colors even on very large screens. Due to their high color purity and low cost advantages, it has also gained much interests in industry. A recent study including researchers with UNIST has introduced a simple technique to extract the three primary colors (red, blue, green) from this material. This breakthrough was led by Professor…

All eyes on Hurricane Michael — ScienceDaily

Hurricane Michael plowed into the Florida panhandle Wednesday, Oct. 10, as a major Category 4 storm — the strongest hurricane ever to hit that region. Many NASA instruments are keeping tabs on Michael from space, including the Atmospheric Infrared Sounder (AIRS) and the Multi-angle Imaging SpectroRadiometer (MISR). The first image, taken by AIRS, shows Hurricane Michael just off the west coast of Florida on Oct. 10 in the early morning hours local time. The large purple area indicates very cold…

Redrawing the structure of an immune system protein — ScienceDaily

Researchers have revealed the structure of an essential immune protein, creating future possibilities to develop more effective medicines for a range of illnesses from cancer to neurological diseases. University of Tokyo researchers made this discovery with computerized image analysis and modern electron microscope imaging. Researchers verified the structure of natural immunoglobulin M (IgM) protein, an important part of the immune system, using mouse and human versions of the protein. IgM is now understood to be shaped like an incomplete hexagon,…

Mizzou IMSE faculty reminisce, look to the future as department turns 60

The Industrial and Manufacturing Systems Engineering Department at Mizzou turns 60 this year, and IMSE will celebrate with events that look back on the department’s successes and look ahead to its future. The Industrial and Manufacturing Systems Engineering Department at Mizzou turns 60 this year, and IMSE will celebrate with events that look back on the department’s successes and look ahead to its future. Department Chair Luis Occeña and Professor Jim Noble have been around for plenty of its past…

Etsy’s experiment with immutable documentation

Introduction Writing documentation is like trying to hit a moving target. The way a system works changes constantly, so as soon as you write a piece of documentation for it, it starts to get stale. And the systems that need docs the most are the ones being actively used and worked on, which are changing the fastest. So the most important docs go stale the fastest! 1 Etsy has been experimenting with a radical new approach: immutable documentation. Woah, you just…

SSO Support for the Cloudflare Dashboard

The Challenge of Managing User Access to SaaS Applications As the  number of SaaS services people use everyday grows, it has become more challenging to juggle the number of password and multi-factor authentication combinations users have to keep track of to get online. Adopting identity services have allowed companies to centralize employee authentication. With Cloudflare Access, companies can ensure employees use a company managed identity provider when accessing websites behind Cloudflare. Last week, Sam published a blog on how Cloudflare…

Dropbox traffic infrastructure: Edge network

In this post we will describe the Edge network part of Dropbox traffic infrastructure. This is an extended transcript of our NginxConf 2018 presentation. Around the same time last year we described low-level aspects of our infra in the Optimizing web servers for high throughput and low latency post. This time we’ll cover higher-level things like our points of presence around the world, GSLB, RUM DNS, L4 loadbalancers, nginx setup and its dynamic configuration, and a bit of gRPC proxying.…

Building Representative Talent Search at LinkedIn

Figure 1: A screenshot from the LinkedIn Recruiter product, some details redacted  Our focus as part of representative results is on the set of potential candidates (as well as their relative ordering) shown to a recruiter corresponding to a given search query. In this way, Recruiter will still return the same set of qualified candidates in response to any particular search; no one is added or removed. Recruiter ranking already varies depending on a number of factors, including candidates’ interest…

A Tour Inside Cloudflare’s G9 Servers

Cloudflare operates at a significant scale, handling nearly 10% of the Internet HTTP requests that is at peak more than 25 trillion requests through our network every month. To ensure this is as efficient as possible, we own and operate all the equipment in our 154 locations around the world in order to process the volume of traffic that flows through our network. We spend a significant amount of time specing and designing servers that makes up our network to…