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Category: Electronics Engineering

Impact Optimization in Trust & Safety – Airbnb Engineering & Data Science – Medium

There have been 500 million Airbnb guest arrivals, with listings in 191 countries around the world. Trust and Safety is key to the success and continued growth of Airbnb’s community. We employ a complex system of defenses to identify and prevent malicious activities like identity theft, account-takeover, harmful content, credit card fraud, and more while preserving a seamless experience for our good users. Our system is equipped with machine learning, experimentation, and analytics, as well as tools that empower our…

To improve drones, researchers study flying insects

Mechanical engineering researchers Mark Jankauski and Erick Johnson converse in their lab, where they conduct experiments to improve the ability to design small, flapping wings. MSU Photo by Adrian Sanchez-Gonzalez. Credit: MSU, Adrian Sanchez-Gonzalez The unmanned aircraft known as drones, used by hobbyists, researchers and industry to take aerial images and perform other tasks, are growing ever more popular—and smaller. But that miniaturization, which has produced drones that fit in a person’s palm, has started to bump into the laws…

How engagement bias in short-run experiments can blind you to long-run…

Brian Karfunkel | Data Scientist, Experimentation and Metrics Sciences Congratulations, you’ve just finished building a new feature! But is it good? To find out, you launch an experiment: show half the users your new feature and see how they behave compared to the other half. You run this A/B test for a few days (until you get your predetermined sample size) and the feature performs well! You decide to ship it, but just to be sure you run a long-term…

A new force for optical tweezers awakens — ScienceDaily

When studying biological cells using optical tweezers, one main issue is the damage caused to the cell by the tool. Giovanni Volpe, University of Gothenburg, has discovered a new type of force that will greatly reduce the amount of light used by optical tweezers — and improve the study of all kinds of cells and particles. “We call it ‘intra-cavity feedback force’. The basic idea is that, depending on where the particle or cell you want to study is, the…

Securing Certificate Issuance using Multipath DCV

This blog post is part of Crypto Week 2019. Trust on the Internet is underpinned by the Public Key Infrastructure (PKI). PKI grants servers the ability to securely serve websites by issuing digital certificates, providing the foundation for encrypted and authentic communication. Certificates make HTTPS encryption possible by using the public key in the certificate to verify server identity. HTTPS is especially important for websites that transmit sensitive data, such as banking credentials or private messages. Thankfully, modern browsers, such…

Cold weather increases the risk of fatal opioid overdoses — ScienceDaily

Cold weather snaps are followed by a marked increase in fatal opioid overdoses, a new study finds. A research team led by Brandon Marshall, an associate professor of epidemiology at Brown University’s School of Public Health, found a 25 percent increase in fatal opioid overdoses after periods of freezing temperatures compared to days with an average temperature of 52 degrees. And while the researchers continue to investigate the reasons for this pattern, Marshall suggests some interventions that could reduce overdose…

Not All Heroes Wear Capes

To kick-off Crypto Week 2019, we are really excited to announce a new solution to a long-standing problem in cryptography. To get a better understanding of the technical side behind this problem, please refer to the next post for a deeper dive. Everything from cryptography to big money lottery to quantum mechanics requires some form of randomness. But what exactly does it mean for a number to be randomly generated and where does the randomness come from? Generating randomness dates…

Tiny probe that senses deep in the lung set to shed light on disease

This hair-sized probe can measure key indicators of tissue damage deep in the lung. Credit: Michael Tanner, Herriot-Watt University and the University of Edinburgh. A hair-sized probe that can measure key indicators of tissue damage deep in the lung has been developed by scientists. The new technology could pave the way for accurate monitoring of tissue in areas where existing technologies cannot reach. Experts say the probe can pick up tiny changes in tissue health and could improve how patients…

Welcome to Crypto Week 2019

The Internet is an extraordinarily complex and evolving ecosystem. Its constituent protocols range from the ancient and archaic (hello FTP) to the modern and sleek (meet WireGuard), with a fair bit of everything in between. This evolution is ongoing, and as one of the most connected networks on the Internet, Cloudflare has a duty to be a good steward of this ecosystem. We take this responsibility to heart: Cloudflare’s mission is to help build a better Internet. In this spirit,…

Industry needs studied as demand and production increases — ScienceDaily

Across the United States and Canada, demand for local specialty cut flowers is increasing, and production has correspondingly jumped. To accurately assess the needs of the industry, John Dole, Cristian Loyola, and Rebecca Dunning electronically surveyed 1098 cut flower producers and handlers regarding their current cut flower production and postharvest problems and customer issues. The illuminating results of their survey received careful analysis and are detailed in the article, “North American Specialty Cut Flower Production and Postharvest Survey,” as found…