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Category: Electronics Engineering

Many organs that are discarded could benefit patients on the waitlist — ScienceDaily

Researchers who developed a tool to assess organ acceptance practices by transplant centers found wide variability in centers’ willingness to use less-than-ideal donor kidneys. The findings, which appear in an upcoming issue of CJASN, may help improve centers’ policies related to organ acceptance and therefore boost rates of transplantation. The number of patients waiting for a kidney transplant continues to increase, and approximately 5,000 waitlisted patients in the United States die each year while waiting for a deceased donor kidney…

How and Why We Contributed to MvRx – Wayfair Tech Blog

State machines – they’ve been around for a long time in computer science, but are perhaps forgotten in the last few decades, at least in mobile apps. My team at Wayfair chose to revisit state machines and give them a try in our production app. This is how we came upon MvRx and contributed to their open source efforts. About the Waystation App Before we dive in, a little context about our app. The Waystation App supports internal users at…

Video @Scale 2019 recap – Facebook Engineering

The development of large-scale video systems includes complex, unprecedented engineering challenges. At Video @Scale 2019, engineers gathered in San Francisco for a day of technical talks focused on delivering video at scale. Speakers from various companies, including Amazon, Facebook, Netflix, Twitch, and YouTube, discussed video streaming, encoding, contextual ads, and more. This year’s event also included a women in engineering breakfast panel and an AV1 panel for interested attendees. If you missed the event, you can view recordings of the…

Fighting fraud using partially blind signatures

We spend a lot of time thinking through the best ways to preserve privacy for the people using our services, while also combatting fraud across our platforms. We handle thousands of different types of events reported by client apps for various purposes, including investigating crashes, assessing performance, and monitoring product and advertising metrics. These events help us understand our apps and improve the experience for the people using them. There is a careful balance we look to achieve between reporting…

The Lucas Critique and the Necessity of Theory

The Lucas Critique, named after economist Robert Lucas, is a theoretical result that blew up the discipline of macroeconomics in the 1970s, and its implications are directly relevant to much of the work that data scientists are doing today—including work that I am doing on the Algorithms team at Wayfair! Just like jumpsuits and peasant dresses, what is old is new again! So imagine yourself in some fabulous 70s fashion and come on a nerdy journey with me… First, I…

Evolving Michelangelo Model Representation for Flexibility at Scale

Michelangelo, Uber’s machine learning (ML) platform, supports the training and serving of thousands of models in production across the company. Designed to cover the end-to-end ML workflow, the system currently supports classical machine learning, time series forecasting, and deep learning models that span a myriad of use cases ranging from generating marketplace forecasts, responding to customer support tickets, to calculating accurate estimated times of arrival (ETAs) and powering our One-Click Chat feature using natural language processing (NLP) models on the…

Systems @Scale 2019 recap – Facebook Engineering

Building and operating systems that serve billions of people can present unprecedented and complex engineering challenges. The second Systems @Scale event of 2019 was held in New York, where engineers gathered for a day of technical talks focused on observability: tools, techniques, and approaches that can be applied to observing the state of complex distributed systems. Speakers from various companies, including Etsy, Facebook, Google, LightStep, Squarespace, and Uber, discussed a wide spectrum of topics, from the concept of deep systems…

A Data Synchronization and Enrichment Platform

Part I: Overview Andreas Andreakis, Falguni Jhaveri, Ioannis Papapanagiotou, Mark Cho, Poorna Reddy, Tongliang Liu It is a commonly observed pattern for applications to utilize multiple datastores where each is used to serve a specific need such as storing the canonical form of data (MySQL etc.), providing advanced search capabilities (ElasticSearch etc.), caching (Memcached etc.), and more. Typically when using multiple datastores, one of them acts as the primary store, and the others as derived stores. Now the challenge becomes…

Modified multi-layered bismuth superconductor for higher critical temperatures — ScienceDaily

Scientists from Tokyo Metropolitan University have created a new layered superconducting material with a conducting layer made of bismuth, silver, tin, sulfur and selenium. The conducting layer features four distinct sublayers; by introducing more elements, they were able to achieve unparalleled customizability and a higher “critical temperature” below which superconductivity is observed, a key objective of superconductor research. Their design strategy may be applied to engineer new and improved superconducting materials. Once an academic curiosity, superconductors are now at the…

Hydrologic simulation models that inform policy decisions are difficult to interpret — ScienceDaily

Hydrologic models that simulate and predict water flow are used to estimate how natural systems respond to different scenarios such as changes in climate, land use, and soil management. The output from these models can inform policy and regulatory decisions regarding water and land management practices. Numerical models have become increasingly easy to employ with advances in computer technology and software with graphical user interface (GUI). While these technologies make the models more accessible, problems can arise if they are…