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Category: Electronics Engineering

Engineering Uber’s On-Call Dashboard – Uber Engineering Blog

Uber’s on-call engineers facilitate seamless experiences for riders and drivers worldwide by maintaining the 24/7 reliability of our apps. To execute on this reliability, however, we need to ensure that our on-call teams are set up for success. Until January 2016, our on-call toolbox was dispersed across several systems, making it difficult for engineers to respond to alerts quickly and efficiently. Compounding this was the inability of the tracking solution we were using at the time—email reports—to effectively relay contextual…

Researchers achieve 4-D printing of programmable shape-changing structures

3D Printing and Additive Manufacturing is the only peer-reviewed journal focused on the rapidly moving field of 3D printing and related technologies. Credit: Mary Ann Liebert, Inc., publishers A new study describes 3D printing of Shape Memory Polymers to produce active meta-materials that can be programmed to form versatile shapes and are then able to recover their original state when heated to above their activation temperatures. This innovative combination of 3D printing, thermoviscoelastic meta-materials, and programmable design to create 4D…

AR glasses help surgeons when operating on tumors

AR glasses enable the doctor to precisely locate the site of the lymph node during surgery. Credit: Fraunhofer-Gesellschaft Malignant tumors often form metastases that spread to other parts of the body via the lymphatic system. High surgical skills are required to identify the precise location of the affected lymph nodes, enabling them to be completely removed. Fraunhofer researchers have developed a navigation aid that simplifies such interventions. 3-D-ARILE is an augmented reality (AR) system that superimposes a virtual image of…

A powerful duo

Bracket with EWOD chip and connections for probe injection and the circuits. Credit: Fraunhofer-Gesellschaft An important aspect of pharmacology is understanding how active drug ingredients cross-react with endogenous molecules. But until now, such reactions could only be determined after the event. The precise details of the interacting factors remained unclear. Fraunhofer researchers have developed a new technology that enables biochemical reactions to be monitored from start to finish at the single-molecule level. All that is needed to perform such tests…

The future for defense drones may be under the oceans

The next frontier for unmanned military drones may not be solely in the skies. It could be undersea. The U.S. Navy and defense contractors such as Boeing, Lockheed Martin and others are increasingly focusing on ocean drones as the next big market for unmanned technology. Lockheed Martin Ventures in September month invested an undisclosed amount in San Diego-based Ocean Aero, a 25-employee startup that is developing the Submaran—a solar and wind powered ocean drone capable of operating above and…

Making your water safer with UV light

In Natalie Hull’s hometown in rural Kentucky, well water was contaminated by heavy metals from mining, and sewage from pipes emptied into a creek that ran near her house. So it’s not entirely surprising that when it came time to choose a PhD topic, she decided to focus on water purification and disinfection. Now in the final year of her environmental engineering studies, Hull’s research looks into the different wavelengths of ultraviolet radiation that will best kill dangerous pathogens in…

Fabricating shape-shifting objects with hobbyist 3-D printers

Credit: Amir Zadpoor / TU Delft Researchers at TU Delft have combined origami techniques and 3-D printing to create flat structures that can fold themselves into 3-D structures like tulips. The structures self-fold according to a pre-planned sequence, with some parts folding sooner than others. Usually, expensive printers and special materials are needed to fabricate such objects. But the TU Delft scientists have created a new technique that requires only a common 3-D printer and ubiquitous material. Among other applications,…

Mate tea made safer

Credit: CC0 Public Domain South America’s answer to the Brits’ builder’s brew, their choice pick-me-up is said to have the kick of coffee, the health perks of tea and the delight of chocolate. But for all its benefits, Brazil’s best-loved beverage has been linked to mouth, throat, kidney and bladder cancers. It is a hard fact to swallow in a country where people in every park and square sit sipping it. Made from the dried, chopped, ground leaves of…

Fixing the Plumbing: How We Identify and Stop Slow Latency Leaks at LinkedIn

So, e.g., a regression of a “high” traffic page is classified as P0 if PLT this week is above 30% of the baseline (high water mark). This regression will be resolved only when the PLT is less than 5% above the baseline (low water mark). Note that the thresholds are revised periodically, so the thresholds shown here are examples to illustrate the overall concept. TicketsWe open internal tickets for each regression and assign them to page owners. Page ownership is…