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Category: Mechanical Engineering

Volumetric 3-D printing builds on need for speed

Volumetric 3D printing creates parts by overlapping three laser beams that define an object’s geometry from three different directions, creating a hologram-like 3D image suspended in the vat of resin. The laser light, which is at a higher intensity where the beams intersect, is kept on for about 10 seconds, enough time to cure the object. Credit: Lawrence Livermore National Laboratory While additive manufacturing (AM), commonly known as 3-D printing, is enabling engineers and scientists to build parts in configurations…

Scientists channel graphene to understand filtration, ion transport into cells — ScienceDaily

Tiny pores at a cell’s entryway act as miniature bouncers, letting in some electrically charged atoms — ions — but blocking others. Operating as exquisitely sensitive filters, these “ion channels” play a critical role in biological functions such as muscle contraction and the firing of brain cells. To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules, particularly water, that have an affinity for the charged…

Research team develops novel program to make more cost effective runways

Credit: Texas A&M University An aircraft’s impact on the runway is likely the last thing to cross anyone’s mind when boarding a flight. The constant taking off and landing of aircraft throughout the day places stress on runway pavement, which needs to be in good condition to ensure the safety of the aircraft and its passengers. Thanks to a predictive model developed by a collaborative research team led by the Zachry Department of Civil Engineering at Texas A&M, understanding how…

The Glimmer Binary Experience | LinkedIn Engineering

Co-authors: Sarah Clatterbuck, Chad Hietala, and Tom Dale A bit over a year ago, Ember.js got a major overhaul. In a tight collaboration between LinkedIn engineers and the open source community, we replaced Ember’s rendering engine with a new library, Glimmer VM, that improved performance and significantly reduced the size of compiled templates. Glimmer treats Handlebars templates as a functional programming language and compiles them into a sequence of instructions that can be executed in the browser. These instructions, or…

Team uses 4.5G mobile phone network for drone traffic management

(From left) M1 Chief Operating Officer Patrick Scodeller, M1 Chief Technical Officer Denis Seek and NTU ATMRI Director Professor Duong and NTU Professor Low Kin Huat with the custom drone built by NTU which can be controlled through M1’s 4.5G mobile network. Credit: NTU Singapore Researchers from Nanyang Technological University, Singapore (NTU Singapore) has embarked on a research project which uses existing high-speed mobile phone networks to track and control drones. In collaboration with a leading telecommunications company, M1 Ltd,…

Researchers 3-D print lifelike artificial organ models

Researchers can attach sensors to the organ models to give surgeons real-time feedback on how much force they can use during surgery without damaging the tissue. Credit: McAlpine Research Group A team of researchers led by the University of Minnesota has 3D printed lifelike artificial organ models that mimic the exact anatomical structure, mechanical properties, and look and feel of real organs. These patient-specific organ models, which include integrated soft sensors, can be used for practice surgeries to improve surgical…

Project aim at reducing cost of hydrogen fuel cells — ScienceDaily

Replacing your everyday gas guzzler with a hydrogen fueled car could drastically reduce your carbon footprint. So why don’t we all make the switch? One of reasons we don’t is the expensive platinum catalyst required to operate hydrogen fuel cells efficiently. Research led by Sandia National Laboratories and the University of California, Merced aim at bringing down the cost of hydrogen fuel cells by using a dirt-cheap compound to create an uneven surface that resembles a plant’s leaves. The additional…

With the right tools, we can mine cities

Cities like Melbourne are a store for such huge amounts of resources that they could be used as urban mines. Credit: Donaldytong (own work)/Wikimedia From 1900 to 2010, the amount of materials accumulated in buildings and infrastructure across the world increased 23-fold. We are depleting our resources at unprecedented rates. Instead of extracting dwindling raw materials from nature at ever-increasing cost, the time has come to start re-using materials from buildings and infrastructure in our cities. We have been working…

‘Origami’ lattices with nano-scale surface ornaments

Credit: Delft University of Technology Inspired by origami, the Japanese art of paper folding, researchers at TU Delft are developing an alternative to 3-D printing that gives the final products many more functionalities than what is possible with 3-D printing. Such functionalities could, for instance, be used in medical implants or devices incorporating flexible electronics. In their publication in Science Advances on Wednesday November 29th, the scientists report successfully applying their technique to lattice structures. Lattice structures are used in…

Engineering an Uneventful New Year’s Eve

Software engineers Matt Schallert, Katie Tezapsidis, Carissa Blossom, and Tom Croucher discuss what it takes to prepare our systems for holidays and other high traffic events. While most spend New Year’s Eve watching the ball drop or celebrating with friends (festive party hat in tow), Uber Engineering has historically treated the holiday like a final exam. With users worldwide relying on Uber for safe and reliable transportation to and from their celebrations, New Year’s Eve often marks our highest traffic…