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Engineering News

Laser experiments verify ‘turbulent dynamo’ theory of how cosmic magnetic fields are created — ScienceDaily

The universe is highly magnetic, with everything from stars to planets to galaxies producing their own magnetic fields. Astrophysicists have long puzzled over these surprisingly strong and long-lived fields, with theories and simulations seeking a mechanism that explains their generation. Using one of the world’s most powerful laser facilities, a team led by University of Chicago scientists experimentally confirmed one of the most popular theories for cosmic magnetic field generation: the turbulent dynamo. By creating a hot turbulent plasma the…

New brain disease test for Parkinson’s, dementia with Lewy bodies — ScienceDaily

National Institutes of Health scientists developing a rapid, practical test for the early diagnosis of prion diseases have modified the assay to offer the possibility of improving early diagnosis of Parkinson’s disease and dementia with Lewy bodies. The group, led by NIH’s National Institute of Allergy and Infectious Diseases (NIAID), tested 60 cerebral spinal fluid samples, including 12 from people with Parkinson’s disease, 17 from people with dementia with Lewy bodies, and 31 controls, including 16 of whom had Alzheimer’s…

Designing Uber’s Product Manager Bootcamp

Uber’s product managers (PMs) ensure that our technologies fulfill the company’s vision of improving transportation experiences for users worldwide. Among other duties, PMs lead cross-functional teams, prioritize efforts, and communicate with stakeholders to facilitate the successful execution of product roadmaps. At Uber, PMs are embedded within various parts of the tech organization and are accountable for products ranging from our core rider, eater, and driver experiences to our internal applications. By 2017, we had grown to over a dozen offices,…

Chicken pox vaccine linked with shingles at the vaccination sight in some children — ScienceDaily

New research in Pediatric Dermatology reports several cases of shingles that developed at the original vaccination site in healthy children after they were immunized against chicken pox.  Most of these cases were initially misdiagnosed as other skin rashes. While some of these patients underwent tests to help make the diagnosis, all of the children recovered without complications.  Infection with the varicella-zoster virus leads to chickenpox, or primary varicella. The virus then lies dormant and can later reactivate as shingles, or herpes zoster.  The varicella-zoster…

Improving drone performance in headwinds

Quad-rotor configuration with outer side tiled rotor. Credit: Hikaru Otsuka The prevalence of multi-rotor drones has increased dramatically in recent years, but in headwinds, they pitch upwards unpredictably. Engineers from Tohoku University, Japan, have shown that angling the rotor blades of a quad-rotor unmanned aerial vehicles by just 20 degrees can reduce pitching by a quarter. Their work is published in the International Journal of Micro Air Vehicles. Multi-rotors have gotten much smaller since the turn of the century, and…

Building with waste and recycled material

Credit: Zooey Braun – Stuttgart A residential module fully constructed from reusable, recyclable, and compostable materials: This is the premise for the newest unit in NEST, the modular research and innovation building run by Empa and Eawag in Dübendorf. On 8 February 2018, the NEST “Urban Mining & Recycling” unit will open its doors and henceforth house two students. At the same time, as an active lab it will also help to advance the construction industry’s transition to a recycling…

Tumblr Engineering — NYC PHP Reboot

Reviewing code is one of the most important parts of an engineer’s job at Tumblr, even more so than writing code. Our codebases are shared by hundreds of engineers, so it’s critical to make sure we’re not just writing the best code we can, but that the code being written can be understood by others. Taking the time to review someone else’s code is the most critical opportunity to ensure all of that is happening. At Tumblr, every code change…

Researchers run first tests of unique system for welding highly irradiated metal alloys

ORNL and EPRI built an enclosed welding system in a hot cell of ORNL’s Radiochemical Engineering Development Center. C. Scott White (ORNL) performs operations with remotely controlled manipulators and cameras. The system combines capabilities for laser welding and frictional stir welding of irradiated stainless steels. Credit: DOE LWRS; photographer Keith Leonard Scientists of the Department of Energy’s Light Water Reactor Sustainability Program (LWRS) and partners from the Electric Power Research Institute (EPRI) have conducted the first weld tests to repair…

Dynamometer: Scale Testing HDFS on Minimal Hardware with Maximum Fidelity

Larger clusters submit more operations, and in the presence of the discussed performance regression, larger clusters also require a longer time to complete each operation. This combination results in a superlinear performance impact. In the process of investigating our original incident, we found that the performance regression was brought on by a seemingly innocuous change that had slipped into several upstream releases. The goal of the original change (discovered and fixed a few months later) was to fix a bug…

Mathematics pushes innovation in 4-D printing

Recent advances in digital factory science make it possible to print more compliant objects across a wider range of length-scales than conventional engineering processes. A bottleneck for enabling the next technological progress resides in filling the gap in the comprehension of the unprecedented degree of complexity dominating this novel technology. Mathematics plays a pivotal role in this contemporary industrial revolution: a study recently published by Nature Communications solves a problem of utmost importance for the development of 4-D printing, i.e.…