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Engineering News

Space station motors make a robotic prosthetic leg more comfortable, extend battery life

A student tests the robotic leg at the University of Texas at Dallas. The strong motors powering the knee and ankle can propel the user’s body while allowing the knee to swing freely, with regenerative braking to extend battery life. Credit: University of Texas at Dallas A new robotic prosthetic leg prototype offers a more natural gait while also being quieter and more energy efficient than other designs. The key is the use of new small and powerful motors, originally…

In one hour, surface coating inactivates virus that causes COVID-19 — ScienceDaily

Door knobs, light switches, shopping carts. Fear runs rampant nowadays when it comes to touching common surfaces because of the rapid spread of the coronavirus. A Virginia Tech professor has found a solution. Since mid-March, William Ducker, a chemical engineering professor, has developed a surface coating that when painted on common objects, inactivates SARS-CoV-2, the virus that causes COVID-19. “The idea is when the droplets land on a solid object, the virus within the droplets will be inactivated,” Ducker said.…

Using Chatbots to Provide Faster COVID-19 Community Support | by Chris Zhu | Airbnb Engineering & Data Science | Jul, 2020

Helpbot is a customer support chatbot powered by machine learning, which replaces the contact flow for guests trying to message Airbnb for support. We used Helpbot to provide intelligent help regarding COVID-19 questions, and developed workflows for our Extenuating Circumstances policy. Over 50% of users engaged with the COVID specific flow, which resulted in a significant number of customers being able to solve their problem instantly. Guests rely on Airbnb everyday to assist them through all stages of a trip.…

Versatile Multistep Resistor Load Bank is Simple and Modular

Download this article in PDF format. An array or bank of load resistors is often required for testing power products, characterization of solar panels, and many other applications that require evaluation under various well-defined loads. While simple rheostats can provide continuous variation in load resistance, their power rating decreases as the value of their resistance is decreased, and they have series inductance that’s undesirable in some cases. Instead, a resistor “load bank” is a better alternative. Some of the features…

Cloudflare Network expands to more than 100 Countries

2020 has been a historic year that will forever be associated with the COVID-19 pandemic. Over the past six months, we have seen societies, businesses, and entire industries unsettled. The situation at Cloudflare has been no different. And while this pandemic has affected each and every one of us, we here at Cloudflare have not forgotten what our mission is: to help build a better Internet. We have expanded our global network to 206 cities across more than 100 countries.…

From Automation to Autonomous | Machine Design

Matthias Roese, chief technologist of the Manufacturing & Automotive branch of Hewlett Packard Enterprise, discussed how automated machinery doesn’t mean a production line is autonomous during a Hannover Messe Digital Days session. Roese said that most shop floors are highly automated and, from an IT perspective, everything appears efficient. But there is still room for optimization. Most of the automation now is focused on machine groups—in certain sections of the production line. “What needs to be looked at a little…

EECS Faculty Member Helps Develop Metrics for Open Source Software

Associate Professor Sean Goggins is working on metrics to help open source software communities better understand projects. Those wanting to download and use open source software in the future will have a better sense of what they’re getting, thanks in part to the work of a Mizzou Engineer. Open source software is computer software distributed with a license that allows anyone to see, use and modify the original code. In many cases, an open source project attracts other developers who…

New EU Reporting Requirements for Substances of Very High Concern

>> Electronic Design Resources.. >> Library: Article Series.. ..>> Series: The JESD204 Story Data converters (digital-to-analog and analog-to-digital), which are used in a wide range of applications from audio and music to test instrumentation, continue to evolve. As the bit depth and sample rate go up, getting data in and out becomes increasingly difficult. A decade or two ago, with sample rates for high–speed converters limited to 100 MSPS and below, using TTL or CMOS parallel data buses was sufficient.…

Study finds visual localization and acuity varies from person to person — ScienceDaily

We humans may not always see eye to eye on politics, religion, sports and other matters of debate. But at least we can agree on the location and size of objects in our physical surroundings. Or can we? Not according to new research from the University of California, Berkeley, recently published in the Proceedings of the Royal Society B: Biological Sciences journal, that shows that our ability to pinpoint the exact location and size of things varies from one person…

Bridging batch and stream processing for the Recruiter usage statistics dashboard

Discrepancies across metrics computed from streaming engine vs. computed from batch engine To validate the consistency of metrics, we compute metrics over the same day from both batch and streaming engines and measure the resulting discrepancies. The above chart shows the observed differences between the two engines with and without implementing event deduplication. There are 11 metrics used for the dashboard—among them, searchesperformed and activedays are non-additive, while the remaining are additive. Without the deduplication logic, the discrepancies are already…