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Engineering News

Omega fish oils don’t improve school children’s reading skills or memory, study finds — ScienceDaily

New research has found no evidence Omega-3 fish oil supplements help aid or improve the reading ability or memory function of underperforming schoolchildren. These findings are in contradiction to an earlier study run by the same team using the same supplement. In the second high-quality trial of its kind, published in PLOS ONE, the researchers found an entirely different result to an earlier study carried out in 2012, where omega-3 supplements were found to have a beneficial effect on the…

Queryparser, an Open Source Tool for Parsing and Analyzing SQL

In early 2015, Uber Engineering migrated its business entities from integer identifiers to UUID identifiers as part of an initiative towards using multiple active data centers. To achieve this, our Data Warehouse team was tasked with identifying every foreign-key relationship between every table in the data warehouse to backfill all the ID columns with corresponding UUIDs.¹ Given the decentralized ownership of our tables, this was not a simple endeavor. The most promising solution was to crowdsource the information by scraping…

Air Traffic Controller: Member-First Notifications at LinkedIn

Steps a notification goes through in ATC   Request decorationOne of the first steps in the ATC process is getting the metadata needed to make a notification decision. This metadata may include the member’s historical notification profile, the devices they have the LinkedIn app installed on, and their notification settings. ATC gets this information from multiple local stores (RocksDB) and from external services. ATC will also log the current notification request to help continue to build the member’s historical notification…

Why the web has challenged scientists’ authority – and why they need to adapt

And distrustful segments of society fear what academia does; one survey found that 58 percent of Republicans and Republican-leaning independents say colleges and universities have a negative effect on the way things are going in the country. There are multiple causes for this existential crisis, but one in particular deserves special attention. The web is fundamentally changing the channels through which science is communicated – who can create it, who can access it and ultimately what it is. Society…

Meet Bandaid, the Dropbox service proxy

With this post we begin a series of articles about our Service Oriented Architecture components at Dropbox, and the approaches we took in designing them. Bandaid, our service proxy, is one of these components. Follow along as we discuss Bandaid’s internal design and the approaches we chose for the implementation. Bandaid started as a reverse proxy that compensated for inefficiencies in our server-side services. Later we developed it into a service proxy that accelerated adoption of Service Oriented Architecture at…

Can sound be used as a weapon?

Electrical engineering and computer science professors Wenyuan Xu from Zhejiang University and Kevin Fu from the University of Michigan explain their research, which suggests a more likely scenario of sloppy engineering, and what ultrasound frequencies (which can be used to transmit information gathered by listening devices) traveling through the air can – and can’t – do. 1. What is ultrasound useful for? The most commonly known use for ultrasound – high-frequency sound waves human ears can’t hear –…

A couple of QFNs and Circuit Maker CAD software

It’s about time for another project. I normally design half a dozen or so small boards per year. It’s not my profession. It’s just something I do. But I haven’t designed or built anything since the “incident” with the photo transistors back in ’17. We don’t talk about that around here no more. Regardless, it’s a new day and I’ve got CircuitMaker open and a solderless bread board with a working design sitting in front of me. I recently wrote about…

Why Monitoring for Success in your Supply Chain is More Important than Monitoring for Failure

The Supply Chain Engineering organization at Wayfair helps power, connect, and optimize differentiated shipping and delivery programs, consistently executes against customer promises, and maintains effective stewardship of the bottom line. We are responsible for every step in the supply chain from the moment you order a couch on our website, all the way on its journey to your door. Our software is used by staff in our warehouses, consolidation facilities, and by our delivery agents. Our main priority? Making sure…

Why Blogger Outreach is an Essential Part of any SEO Campaign

Any business that is based online and wants to become truly successful needs to make blogging an important part of their SEO campaign. The success of your SEO efforts will largely depend on the amount of published content you have. You won’t be able to get the results you are after until you get involved in blogging. Blogger outreach is one of the single most crucial aspects of any online marketing strategy. Supplement Your Content The more content you have…

Researchers use recycled carbon fiber to improve permeable pavement

Water runs through Washington State University pervious pavement. Credit: Washington State University A Washington State University research team is solving a high-tech waste problem while addressing the environmental challenge of stormwater run-off. The researchers have shown they can greatly strengthen permeable pavements by adding waste carbon fiber composite material. Their recycling method, described in the March issue of the Journal of Materials in Civil Engineering, doesn’t require using much energy or chemicals—a critical factor for recycling waste materials. Traditional…