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Category: Mechanical Engineering

Building a dynamic and responsive Pinterest – Pinterest Engineering – Medium

Bo Liu | Engineering Manager, Serving Systems team In 2015, the majority of content on Pinterest was pregenerated for users prior to login. It was stored statically in HBase and served directly upon entering the service. (More details can be found in the blog post Building a smarter home feed.) Although our earlier architecture helped us grow to 100 million monthly active users by 2015, it had several weak points that prevented us from building more dynamic and responsive products.…

The Dambusters raid took place 75 years ago – here’s how they made a bomb bounce

Sir Barnes Wallis was a genius engineer who designed a very special bomb during World War II. The idea was that it would bounce across water and destroy German dams along the Ruhr Valley, causing massive flooding and damage to water and hydroelectricity supplies. Partly thanks to the 1955 film The Dam Busters, the story behind Operation Chastise, which took place on May 16 and 17 in 1943, has become a familiar war time tale. But Wallis’s actual working calculations…

Supporting brace for historical steel bridges

The Diamond Creek Bridge near Melboune was reinforced with CFRP strips in 2018 and tested for durability with a 42-ton truck after work. Credit: Swiss Federal Laboratories for Materials Science and Technology Empa scientists are saving iron bridges from the 19th century from collapse. Carbon fiber plasters are strengthening the crumbling structures. A railway bridge in Switzerland and a road bridge in Australia have already been reinforced successfully. Many historical bridges could follow. “Partners in crime” are specialists for steel…

The 5 Biggest Project Management Trends Shaping 2018

You want strong tech, but you must have this balanced out through other strategies. Tech makes life easy, but it also comes with its own complications. Technology is always on the march. While it’s important to use the latest effective innovations, it’s also important to remember that the tech world isn’t everything. How you manage a given project will depend on the tools available, as well as the personnel with whom you work. But competition will additionally play a role,…

Keeping students on-track – Coursera Engineering – Medium

How our algorithms identify at-risk students, powering automated and human interventions Since the beginning of 2016, Coursera has been rapidly expanding into the online degree space to give working professionals the opportunity to earn credentials from the world’s top universities. These programs allow a population of busy and geographically dispersed students to work toward valuable degrees with much greater flexibility at a more affordable price point. One of the challenges of executing on this ambitious mission is the need to…

Towards answers in self-organization — ScienceDaily

The electrical and mechanical responses of crystal materials, and the control of their coupled effect, form one of the central themes in material science. They are vital to applications such as ultrasonic generators and non-volatile memory. However, despite knowledge of how to control such materials being widely demonstrated in practice, to date the physical principle behind the controllability through lattice organization, remains undefined. Researchers at The University of Tokyo Institute of Industrial Science have sought to change this by creating…

Cloudflare goes InterPlanetary – Introducing Cloudflare’s IPFS Gateway

Today we’re excited to introduce Cloudflare’s IPFS Gateway, an easy way to access content from the InterPlanetary File System (IPFS) that doesn’t require installing and running any special software on your computer. We hope that our gateway, hosted at cloudflare-ipfs.com, will serve as the platform for many new highly-reliable and security-enhanced web applications. The IPFS Gateway is the first product to be released as part of our Distributed Web Gateway project, which will eventually encompass all of our efforts to…

State-of-the-art detectors that screen out online hate speech can be easily duped by humans, shows new study. — ScienceDaily

State-of-the-art detectors that screen out online hate speech can be easily duped by humans, shows new study. Hateful text and comments are an ever-increasing problem in online environments, yet addressing the rampant issue relies on being able to identify toxic content. A new study by the Aalto University Secure Systems research group  has discovered weaknesses in many machine learning detectors currently used to recognize and keep hate speech at bay. Many popular social media and online platforms use hate speech…

Building a scalable and high performant time series database system

By Rui Zhang | Engineer, Storage & Caching Co-authored by Jinghan Xu, Jian Wang & Tian-Ying Chang, Engineers At Pinterest, developers rely on Statsboard to monitor their systems and discover issues. A reliable and efficient monitoring system is very important for development velocity. Historically, we’ve used OpenTSDB to ingest and serve metrics data. However, as Pinterest grows, the number of services have also increased from hundreds to thousands, generating millions of data points every second, and growing. While OpenTSDB worked…

A community-driven approach to AI infrastructure – Facebook Code

Today, we are announcing the next steps in Facebook’s efforts to build a hardware ecosystem for machine learning (ML) through partner support of the Glow compiler. We’re pleased to announce that Cadence, Esperanto, Intel, Marvell, and Qualcomm Technologies Inc, a subsidiary of Qualcomm Incorporated, have committed to supporting Glow in future silicon products. We introduced Glow earlier this year to enable hardware acceleration for ML. As we look to proliferate deep learning frameworks such as PyTorch, we need compilers that…