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Author: engineering

New Ways to Put the Wonderful Wiegand Wire to Work

At a Glance: What makes the Wiegand effect interesting is that the strength of this pulse is virtually constant. Tiny Wiegand sensors, packaged as SMD components, are commonly used in multi-turn encoders for gas and water meter applications. An R&D initiative, sponsored by sensor manufacturer Posital and the German ministry of science and technology, aims to significantly increase energy output of Wiegand sensors. A Wiegand wire is a small piece of ferromagnetic wire with a special—almost magic—characteristic: When a magnetized…

Multi-Modal User Embedding Framework for Recommendations at Pinterest

Aditya Pal | Applied Science, Chantat Eksombatchai | Applied Science, Yitong Zhou | User Understanding, Bo Zhao | User Understanding, Charles Rosenberg | Applied Science, Jure Leskovec | Applied Science As we build a visual discovery engine that powers 2B+ Pins, it’s crucial to understand user interests and preferences in order to serve relevant content. One standard approach to encode user preferences is via an embedding-based representation in a high dimensional space. Most prior methods tried at Pinterest infer a single…

Ultra Smart, Ultra Safe: How UWB Can Benefit the Smart Retail Ecosystem

This article appeared in Microwaves & RF and has been published here with permission. The coronavirus pandemic of 2020 has changed the world in many ways, and one of the most remarkable transformations has been that of consumer retail. Market research from Kantar1 indicates that the number of consumers who did more than half of their shopping online in Europe’s three biggest e-commerce markets rose as much as 80% during the pandemic, and six in 10 respondents say they intend…

Breakthrough technology purifies water using the power of sunlight

A research team, led by Australia’s Monash University, has been able to transform brackish water and seawater into safe, clean drinking water in less than 30 minutes using metal-organic frameworks (MOFs) and sunlight. Credit: Monash University A global research team has been able to transform brackish water and seawater into safe, clean drinking water in less than 30 minutes using metal-organic frameworks (MOFs) and sunlight. In a discovery that could provide potable water for millions of people across the world,…

Blocking Slack Invite Spam With Machine Learning

A fact of life for building an internet service is that, sooner or later, bad actors are going to come along and try to abuse the system. Slack is no exception — spammers try to use our invite function as a way to send out spam emails. Having built up the infrastructure to easily deploy machine learning models in production, we could develop a model relatively quickly that could accurately predict which invites were spam and block them from ever…

Sad Lessons from Beirut Ammonium Nitrate Explosion

  On Tuesday, August 4, a warehouse in the crowded downtown port area of Beirut, Lebanon caught fire.  Lebanon has been going through hard times lately:  COVID-19, hyperinflation, and general government dysfunction.  Ordinarily,  a warehouse fire would not be cause for concern.  But this fire was different, because 2,750 tons of explosive ammonium nitrate was stored in the warehouse as a result of a combination of business misjudgment, bureaucratic incompetence, and negligence.   There are YouTube videos that show what…

Chemist’s new process fast-tracks drug treatments for viral infections and cancer — ScienceDaily

Discovering antiviral and anticancer drugs will soon be faster and cheaper thanks to new research from Simon Fraser University chemist Robert Britton and his international team. For the past 50 years, scientists have used humanmade, synthetic and nucleoside analogues to create drug therapies for diseases that involve the cellular division and/or the viral reproduction of infected cells. These diseases include hepatitis, herpes simplex, HIV and cancer. But, says Britton, “That process has been intensive and challenging, limiting and preventing the…

Deep-sea misconceptions cause underestimation of seabed-mining impacts — ScienceDaily

A new publication on the impacts of deep-seabed mining by 13 prominent deep-sea biologists, led by University of Hawai’i at M?noa oceanography professor Craig Smith, seeks to dispel scientific misconceptions that have led to miscalculations of the likely effects of commercial operations to extract minerals from the seabed. The deep sea, ocean depths below 650 feet (200 metres), constitutes more than 90% of the biosphere, harbors the most remote and extreme ecosystems on the planet, and supports biodiversity and ecosystem…

Preventing Torque Overloads with Mechanical Limiters

Engineers working at robotic companies, auto makers, automatic equipment manufacturers and in many other industries all commonly use torque overload protection devices, slip clutches or torque limiters. They design in limiters to prevent accidental collisions between robots and other moving machines, to avoid overloads on production and assembly machines, and to keep drives and speed reducers safe. All of these collisions or overloads lead to machine downtime, along with the associated higher maintenance costs and lower productivity. This Rencol tolerance…

Power Module Targets 80- to 100-kW EV Traction Inverters

The global trend toward vehicle electrification has put renewed attention on the design of cost-effective traction inverters, which convert energy from the vehicle’s battery to drive the motors in the drivetrain. This key component has a direct impact on road performance, driving range, and reliability of the vehicle. In this context, selecting the power module plays an important role—system designers are looking for the best-sized module with optimal silicon area for the required performance. To meet this need, Infineon Technologies…