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Category: Civil Engineering

Top 10 things I learnt coding on the side – Square Corner Blog – Medium

Liching is a machine learning engineer on the Cash App team in Square’s Melbourne office working on risk and fraud detection. She is new to machine learning, but loves coding on the side and has learnt some really valuable lessons she’d like to share with you. 10 years ago I got a part-time job as a receptionist at a health clinic. I couldn’t believe how much manual processing there was. The filing cabinets were fearful. So I did what most…

Crashes increase when speed limits dip far below engineering recommendation

Speed limits set only five miles per hour below engineering recommendations produce a statistically significant decrease in total, fatal and injury crashes, and property-damage-only crashes, according to a group of Penn State researchers. “If (however) you lower the speed limit by 10, 15, 25 miles per hour, or more, drivers stop paying attention,” said Vikash Gayah, assistant professor of civil engineering. “We found there was an increase in fatal and injury crashes at locations with posted speed limits set 10…

The Billion Data Point Challenge: Building a Query Engine for High Cardinality Time Series Data

By Benjamin Raskin & Nikunj Aggarwal Uber, like most large technology companies, relies extensively on metrics to effectively monitor its entire stack. From low-level system metrics, such as memory utilization of a host, to high-level business metrics, including the number of Uber Eats orders in a particular city, they allow our engineers to gain insight into how our services are operating on a daily basis. As our dimensionality and usage of metrics increases, common solutions like Prometheus and Graphite become…

Our learnings from adopting GraphQL – Netflix TechBlog – Medium

A Marketing Tech Campaign by Artem Shtatnov and Ravi Srinivas Ranganathan In an earlier blog post, we provided a high-level overview of some of the applications in the Marketing Technology team that we build to enable scale and intelligence in driving our global advertising, which reaches users on sites like The New York Times, Youtube, and thousands of others. In this post, we’ll share our journey in updating our front-end architecture and our learnings in introducing GraphQL into the Marketing Tech…

Flint, Michigan lead crisis should have buried the city in water bottles. So, why didn’t it?

One hundred thousand residents of Flint, Michigan could only use water from bottles or filters during a years-long lead contamination crisis, which started when the city switched to a new drinking water source in 2014. As part of a class assignment that grew into a case study, Purdue University researchers found that during the first three weeks of the disaster alone, anywhere from 31 to 100 million bottles were generated as waste. This means that Flint should have been buried…

‘Sudoku’ X-Ray uncovers movements within opaque materials — ScienceDaily

When strolling along the beach, our footprints tell us that the sand under the surface must have moved but not precisely where or how. Similar movements occur in many other natural and human-made substances, such as snow, construction materials, pharmaceutical powders, and even cereals. To examine these largely unknown granular movements, academics from the Sydney Centre in Geomechanics and Mining Materials (SciGEM) including Professor of Civil Engineering, Itai Einav and Postdoctoral Research Associate, Dr James Baker have developed a new…

Mizzou team powering housing project with renewable energy

For the few months, project manager Daniel Davis and five fellow engineers, also known as the Sunsational Engineering Group, have been hard at work designing a low-income housing project partnered with Columbia Housing Authority. Teaming up with local architecture firm, Wallace Architects, the group has begun to develop a residential and commercial facility. Photo courtesy of Daniel Davis. A group of soon-to-be MU engineering graduates have spent the semester hard at work on their capstone project, but it isn’t one…

Innate fingerprint could detect tampered steel parts

David Mascarenas, a research and development engineer at Los Alamos National Laboratory, used Barkhausen noise to find unique-looking ‘fingerprints’ in steel that could help to verify weapons treaties and reduce the use of counterfeit bolts in the construction industry. Credit: Furhana Afrid at Los Alamos Laboratory Researchers using magnetic signals have found unique “fingerprints” on steel, which could help to verify weapons treaties and reduce the use of counterfeit bolts in the construction industry. “Magnetic signals provide a wide range…

Reliable Webhooks Using Serverless Architecture – Square Corner Blog – Medium

A Brief History on our Webhooks From a high level, our webhooks architecture follows the publish-subscribe pattern: there is a set of producers, a message bus, and a set of consumers. A typical webhook event would be pushed by a producer into the publish feed, processed by the message bus by looking at the webhook subscription data, and forwarded to the appropriate consumer feed. The consumer feed will proceed to issue a POST notification to the subscribed endpoint and handle any…

FastMRI open source tools from Facebook and NYU

Facebook AI Research (FAIR) and NYU School of Medicine’s Center for Advanced Imaging Innovation and Research (CAI²R) are sharing new open source tools and data as part of fastMRI, a joint research project to spur development of AI systems to speed MRI scans by up to 10x. Today’s releases include new AI models and baselines for this task. It also includes the first large-scale MRI data set of its kind, which can serve as a benchmark for future research. By…