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Author: engineering

Novel process for surface hardening of stainless steel

Credit: Alexander Varhoshkov Stainless steel is the material of choice in various industries where corrosion resistance is of utmost importance, take for instance parts that are exposed to harsh environments. However, this highly favourable property does not always go hand in hand with high surface hardness, wear resistance and fatigue strength. Most heat treatment methods cannot be easily applied to stainless steels to improve its properties. In particular, surface hardening of stainless steel by nitriding and nitrocarburising in the conventional…

Image: 3-D-molded interconnect devices

Credit: ESA/Art of Technology AG An alternative to conventional circuit boards, these ‘3-D-molded interconnect devices’ add electrical connectivity to the surface of three-dimensional structures. The aim is to combine mechanical, electronic and potentially optical functions in a single 3-D part, allowing the creation of intricate, precisely aligned designs using fewer parts while delivering significant savings in space and weight compared to conventional electronic manufacturing. “These prototype interconnect devices were produced using injection-moulded plastics incorporating electrical metallisation,” explains ESA’s Jussi…

Shedding new light on laser additive manufacturing

Using I12 and the LAMPR the complete process of track formation during 3D printing is revealed. A first complete track and details on the laser/gas flow are shown at the top. The first stages of the formation of this track are shown below for the first few milliseconds of track formation. Credit: Diamond Light Source Additive manufacturing (AM, also known as 3-D printing) allows us to create incredibly complex shapes, which would not be possible using traditional manufacturing techniques. However,…

Turning injectable medicines into inhalable treatments with the help of smart phone components

Friend and colleagues are using devices found in cell phones to atomize very thick liquids. Credit: University of California – San Diego Imagine if all childhood vaccines could get delivered with an inhaler rather than shots; or wiping away tuberculosis bacteria in a patient’s lungs with an inhaler; or disinfecting a hospital room thoroughly with a diffuser. These are the goals of a research team led by Professor James Friend in the Department of Mechanical and Aerospace Engineering at the…

AV1 beats x264 and libvpx-vp9 in practical use case | Engineering Blog | Facebook Code

Improved video compression is important for delivering digital video files more quickly and with higher quality, while using less bandwidth and storage. Everything from 4K movie streaming to smartphone video chat to laptop screen sharing can be enhanced by making the video files smaller through better compression codecs. The Alliance for Open Media — a consortium founded in 2015 and made up of video-on-demand providers including Amazon, Facebook, Google, Microsoft and Netflix, along with web browser developers and semiconductor firms…

Tiny injectable sensor could provide unobtrusive, long-term alcohol monitoring — ScienceDaily

Engineers at the University of California San Diego have developed a miniature, ultra-low power injectable biosensor that could be used for continuous, long-term alcohol monitoring. The chip is small enough to be implanted in the body just beneath the surface of the skin and is powered wirelessly by a wearable device, such as a smartwatch or patch. “The ultimate goal of this work is to develop a routine, unobtrusive alcohol and drug monitoring device for patients in substance abuse treatment…

A cautionary tale about passwords – Medium Engineering

A post for engineers and the technically astute to share with less technical friends and family, brought to you by the Department of Technical Comfort & Security at Medium (previously known as IT). One day, Rabbit frantically hopped over to his friend Fred. Rabbit’s ears were sticking straight up in alarm, “Fred! I just got an email that there was suspicious activity on my RoughageAndMore.bun account! What do I do?” Fred puffs up a bit and says, “It’s okay Rabbit,…

Engineers build smallest volume, most efficient wireless nerve stimulator

The small size of StimDust can be seen in comparison to a dime. Credit: Rikky Muller In 2016, University of California, Berkeley, engineers demonstrated the first implanted, ultrasonic neural dust sensors, bringing closer the day when a Fitbit-like device could monitor internal nerves, muscles or organs in real time. Now, Berkeley engineers have taken neural dust a step forward by building the smallest volume, most efficient wireless nerve stimulator to date. The device, called StimDust, short for stimulating neural dust,…

Differentiable Plasticity: A New Method for Learning to Learn

By Thomas Miconi, Jeff Clune and Kenneth O. Stanley Neural networks, which underlie many of Uber’s machine learning systems, have proven highly successful in solving complex problems, including image recognition, language understanding, and game-playing. However, these networks are usually trained to a stopping point through gradient descent, which incrementally adjusts the connections of the network based on its performance over many trials. Once the training is complete, the network is fixed and the connections can no longer change; as a…

Fixing reachability to 1.1.1.1, GLOBALLY!

Recently we announced our fast, privacy-centric DNS resolver 1.1.1.1, supported by our global network. As you can see 1.1.1.1 is very easy to remember, which is both a blessing and a curse. In the time leading up to the announcement of the resolver service we began testing reachability to 1.1.1.1, primarily using the RIPE Atlas probes. The RIPE Atlas project is an extensive collection of small monitoring devices hosted by the public around the world. Currently there are over 10,000…