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Category: Mechanical Engineering

How Pinterest Fights Spam Using Machine Learning | by Pinterest Engineering | Pinterest Engineering Blog | May, 2021

Vishwakarma Singh | Trust and Safety Machine Learning Lead Hundreds of millions of people regularly visit Pinterest to visually discover inspiring ideas among billions of Pins. Inspiration is a high bar and we must be vigilant in ensuring that Pinners don’t see spam, harmful content or misinformation. To enforce our community policies and maintain an inspiring environment, we use the latest in machine learning technology to build automated systems that swiftly detect and act against both spammy content and spammers.…

Introducing Orbit, An Open Source Package for Time Series Inference and Forecasting

Orbit is a general interface for Bayesian time series modeling. The goal of Orbit development team is to create a tool that is easy to use, flexible, interitible, and high performing (fast computation). Under the hood, Orbit uses the probabilistic programming languages (PPL) including but not limited to Stan and Pyro for posterior approximation (i.e, MCMC sampling, SVI). Below is a quadrant chart to position a few time series related packages in our assessment in terms of flexibility and completeness.…

Automating Cloudflare Tunnel with Terraform

Cloudflare Tunnel allows you to connect applications securely and quickly to Cloudflare’s edge. With Cloudflare Tunnel, teams can expose anything to the world, from internal subnets to containers, in a secure and fast way. Thanks to recent developments with our Terraform provider and the advent of Named Tunnels it’s never been easier to spin up. Classic Tunnels to Named Tunnels Historically, the biggest limitation to using Cloudflare Tunnel at scale was that the process to create a tunnel was manual.…

Breakthrough in reverse osmosis may lead to most energy-efficient seawater desalination ever

Graduate students Abhimanyu Das (left) and Akshay Rao adjust a piston tank, the key component to a new desalination process called “double-acting batch reverse osmosis.” Credit: Purdue University photo/Jared Pike Making fresh water out of seawater usually requires huge amounts of energy. The most widespread process for desalination is called reverse osmosis, which works by flowing seawater over a membrane at high pressure to remove the minerals. Now, Purdue University engineers have developed a variant of the process called “batch…

A long-lasting, stable solid-state lithium battery

Credit: CC0 Public Domain Long-lasting, quick-charging batteries are essential to the expansion of the electric vehicle market, but today’s lithium-ion batteries fall short of what’s needed—they’re too heavy, too expensive and take too long to charge. For decades, researchers have tried to harness the potential of solid-state, lithium-metal batteries, which hold substantially more energy in the same volume and charge in a fraction of the time compared to traditional lithium-ion batteries. “A lithium-metal battery is considered the holy grail for…

A mechanical approach to more efficiently clean desalination membranes

An interdisciplinary team of engineers joined forces to find a new way to clean clogged filtration membranes. Credit: Elia Kneiriemen/J-WAFS Filtration membranes are critical to a wide variety of industries around the world. Made of materials as varied as cellulose, graphene, and nylon, they serve as the barriers that turn seawater into drinking water, separate and process milk and dairy products, and pull contaminants from wastewater. They serve as an essential technology to these and other industries but are plagued…

Cricket bats should be made from bamboo not willow, study finds

Co-author Ben Tinkler-Davies examines a prototype bamboo cricket bat. Credit: Ben Tinkler-Davies Bamboo cricket bats are stronger, offer a better ‘sweet spot’ and deliver more energy to the ball than those made from traditional willow, tests conducted by the University of Cambridge show. Bamboo could, the study argues, help cricket to expand faster in poorer parts of the world and make the sport more environmentally friendly. “The sound of leather on willow” may have delighted cricket lovers for generations but…

Machine learning helps some of the best microscopes to see better, work faster, and process more data — ScienceDaily

To observe the swift neuronal signals in a fish brain, scientists have started to use a technique called light-field microscopy, which makes it possible to image such fast biological processes in 3D. But the images are often lacking in quality, and it takes hours or days for massive amounts of data to be converted into 3D volumes and movies. Now, EMBL scientists have combined artificial intelligence (AI) algorithms with two cutting-edge microscopy techniques — an advance that shortens the time…

3D printing company Desktop Metal will now use wood to print

Desktop Metal. Credit: Forust The 3D printing company Desktop Metal has just announced the release of Forust, a new tool using wood to 3D print objects. The company, founded in 2019, focuses on 3D printing for interior design. With printing methods deemed “non-destructive”, they haven’t come under much scrutiny for safety or environmental concerns, making them an attractive prospect for acquisition. Indeed, according to a filing back in October of 2020, the company’s gross assets acquisition showed a price of…

Improvements to free-space optical networks enable wireless transmission in urban settings

Credit: CC0 Public Domain Free-space optical (FSO) communications has the potential for wide use in the license-free, interference-free transmission of data in unenclosed areas. By using laser beams to propagate through an open-air medium, FSO transmission eliminates the need for wire links. Previous work on terrestrial FSO transmissions focused on either indoors or areas with little atmospheric effects, like between two mountain peaks. Twenty years ago, there were nascent activities in FSO communications for urban settings, which faded because of…