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Category: Aerospace Engineering

Which create less carbon pollution?

These heat maps show carbon dioxide emission differences between drone and truck deliveries as a drone’s energy requirements (measured in watt-hours per mile) and the number of stops on a route increase. Red areas reflect conditions in which drones emit less carbon dioxide than trucks (lighter packages, fewer stops), while blue areas denote conditions in which drones emit more (heavier packages, more stops). Credit: University of Washington Delivering packages with drones can reduce carbon dioxide emissions in certain circumstances as…

A 3-D-printed rocket engine just launched a new era of space exploration

Credit: RocketLab The rocket that blasted into space from New Zealand on May 25 was special. Not only was it the first to launch from a private site, it was also the first to be powered by an engine made almost entirely using 3-D printing. This might not make it the “first 3-D-printed rocket in space” that some headlines described it as, but it does highlight how seriously this manufacturing technique is being taken by the space industry. The team…

NASA drone traffic management tests take off in Reno

On May 25, Chris Walach, director of the FAA-designated Nevada UAS Test Site, briefs team members on NASA’s UTM flight plan. Credit: NASA NASA and its partners are in the midst of testing the next, more complex version of its Unmanned Aircraft Systems (UAS) Traffic Management (UTM) technologies with live, remotely-operated aircraft, or drones, at six different sites around the nation. The three-week campaign, known as Technology Capability Level 2 (TCL2) National Campaign, began May 9 and is focused on…

Reflections on reflection (attacks)

Recently Akamai published an article about CLDAP reflection attacks. This got us thinking. We saw attacks from Connectionless LDAP servers back in November 2016 but totally ignored them because our systems were automatically dropping the attack traffic without any impact. CC BY 2.0 image by RageZ We decided to take a second look through our logs and share some statistics about reflection attacks we see regularly. In this blog post, I’ll describe popular reflection attacks, explain how to defend against…

Exploring underground with a colliding drone

ESA astronaut Luca Parmitano during the CAVES-X1 expedition in a cave system in. Credit: Italy, May 2017. ESA, Natalino Russo www.natalinorusso.it ESA astronaut Luca Parmitano last weekend helped to explore the caverns under Sicily using a drone that deliberately bumped into its surroundings in order to build a map. ESA has been testing equipment, techniques and working methods for missions with astronauts in inner space for many years. Delving inside Earth and exploring caves often parallels the exploration of outer…

Chinese online retailer developing one-ton delivery drones

In this image taken from a Nov. 9, 2016 video footage by AP Video, a drone takes off to deliver JD.com parcel from Tiantong’an village near Suqian city in eastern China’s Jiangsu province. China’s biggest online retailer, JD.com Inc., announced plans Monday, May 22, 2017 to develop drone aircraft capable of carrying a ton or more for long-distance deliveries. (AP Video via AP) China’s biggest online retailer, JD.com Inc., announced plans Monday to develop drone aircraft capable of carrying a…

4 Top Disruptive Technology Trends for 2017

Facebook recently announced it will soon become an augmented reality platform by deploying artificial intelligence (AI) on user smartphones. This new technology will enable users to use their smartphone cameras to layer digital effects atop images and videos, including live videos. Achieving this will require Facebook’s app to run AI over user smartphones. Facebook’s announcement illustrates two of the top disruptive trends that are having a major impact this year: augmented reality and artificial intelligence. Here’s a look at four…

New Cars Ain’t What They Used to Be

A friend of ours whose age is somewhere north of seventy recently bought a new pickup truck.  Soon afterwards, in text messages she started calling herself “Keyfob.”  When we asked why, she said, “Well, that’s what my truck calls me.  When I get out of it it says, ‘Keyfob has left the vehicle.'” She has a new truck because she totaled her previous truck in a collision that she survived largely because of safety features that newer models have.  So…

Messaging Sync — Scaling Mobile Messaging at Airbnb

By Zhiyao Wang, Michelle Leon, Jason Goodman, Nick Reynolds, Julia Fu, Jeff Hodnett, Manuel Deschamps, John Pottebaum, Charlie Jiang Old Inbox vs New Inbox with slow network With more than 100k messages being sent on mobile per hour, messaging is the most engaged with feature on the Airbnb App. However, with the old inbox fetch method on mobile, the inbox was slow to load, suffered from data inconsistency, and required a network connection to read messages. All of this results in…

How Slack Supports Junior Engineers – Several People Are Coding

Mentorship, Impact, and a Culture of Growth Carly Robinson, Application Engineer — Enterprise at Slack HQ The Perks of being a Junior Engineer at Slack I joined Slack in late October 2015 as an Associate Application Engineer on the Enterprise team, which set out to build the recently released Enterprise Grid product. Full Disclosure — this was my first engineering job. When I arrived at my desk on my first day, I tried to play down how star struck I was feeling. To my 1:00 sat Stewart…