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Category: Mechanical Engineering

StatePoint Liquid Cooling System: A new, more efficient way to cool a data center | Engineering Blog | Facebook Code

Facebook data centers are some of the most advanced energy- and water-efficient facilities in the world. By cooling our facilities with outdoor air and using efficient cooling strategies such as our direct evaporative cooling system, our data centers use 50 percent less water than a typical data center. To achieve these results, we employ a variety of cooling strategies tailored to the specific environmental considerations for each data center. In locations with environmental challenges — like high levels of dust,…

Army researchers envision third arm for soldiers

Army Sgt. Michael Zamora uses a prototype Third Arm exoskeleton to easily aim an 18-pound M249 light machine gun during testing at Aberdeen Proving Ground, Maryland, March 14, 2018. Credit: US Army photo by Conrad Johnson When engineers from the U.S. Army Research Laboratory brainstormed on how to improve Soldier lethality, the idea of a third arm seemed like something that might help. Mechanical engineer Dan Baechle carefully planned out a device that doesn’t need batteries, is lightweight and can…

The underwater adhesive

The novel material can be hardened under water. Credit: Vienna University of Technology A special formula for epoxy resins has been developed at TU Wien, which can be used for fibre-reinforced composites in aerospace, shipbuilding and automotive manufacturing, or even for underwater renovation. This is achieved merely by irradiating any part of the resin with light. Within seconds the new material can be completely transformed. Initially, the material is transparent and either in liquid or paste form; then, when any…

Cool Gadgets For Web Designers

Today’s web designers can no longer be termed as a professional who just simply give an effective layout to the websites. We can imagine them as typical designers or insatiable collectors of amazing gizmos and gadgets. We can imagine them as tech freak who is always ready to learn more about the latest gadgets. You can even see them with their favorite eco-friendly bicycles for which they can do just anything and cannot even imagine a day without it –…

Security culture, the Dropbox way

The Dropbox Security Team is responsible for securing around 1 exabyte of data, belonging to over half a billion registered users across the world. The responsibility for securing data at this scale extends far beyond the Dropbox Security Team—it takes a commitment from everyone at Dropbox to safeguard our users’ data every day. In other words, it takes a strong security culture. The first core company value at Dropbox is “Be Worthy of Trust.” From a security perspective, this means…

Custom Module Loading in a Node.js Environment |

Early in 2017, in the course of deciding to convert to React as our frontend framework, we realized we needed to render our React components on the server. We adapted Airbnb’s open source Hypernova renderer for our purposes. In particular, we implemented custom module resolution and modified the Hypernova module loader in order to have complete sandboxing between requests, with much less chance of accidental data leaks. During our completion of this work we learned a lot about module loading,…

A 3-D printer that can print data sets as physical objects

Credit: Science Advances (2018). DOI: 10.1126/sciadv.aas8652 A team of researchers from MIT and Harvard University has come up with a way to get 3-D printers to print objects using data sets rather than geometric representations. In their paper published on the open access site Science Advances, the group describes their new technique and some of the ways they believe it could be used. Anyone who has seen a modern 3-D printer in action knows that there is a lot of…

The Growth of the NYC Engineering Office

NYC Engineering team outing  At a recent engineering show-and-tell in our offices in the Empire State Building, while I watched demos of a new prototype from one of our backend infrastructure teams and learned about the latest creative tools for video, it hit me. We’d done it. We have quietly built, in New York City, a full-capacity R&D organization capable of tackling any challenge across LinkedIn. As the NYC Engineering site director, I also oversee the native video team, which…

New technique for additive manufacturing design

Sandia National Laboratories project lead and mechanical engineer Ted Winrow with the telescope he and his team built using advanced manufacturing techniques. Credit: Randy Montoya A Sandia National Laboratories team built a telescope to demonstrate how to design for additive manufacturing, familiarly known as 3-D printing, to take advantage of the technique’s strengths and weaknesses. Sandia’s three-year Laboratory Directed Research and Development project proved the feasibility of using additive manufacturing as an entirely new design tool, vastly different from the…

The EventHorizon Saga – Code as Craft

This is an epic tale of EventHorizon, and how we finally got it to a happy place. EventHorizon is a tool we use to watch events streaming into our system. Events (also known as beacons) are basically clickstream data—a record of actions visitors take on our site, what content they saw, what experiments they were bucketed into, etc. Events are sent primarily from our web & API servers (backend events) and web browsers (frontend events), and logged in Kafka. EventHorizon…