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Category: Mechanical Engineering

4 Must Have Items For Your Tech Office

For anyone who has ever started their own business there comes a time when you move out of a shared office space or out of the confines of your own dining room, and into a real office. All the greats have taken this journey and the reality is that it is a significant step on the road from transforming from a start-up to a real business. Only once you have premises of your own and are seen to be standing…

Scientists advance a way to track changes in a person’s cardiovascular system

Ten years ago, Skubic’s team developed hydraulic sensors that can be placed under a bed mattress to measure a person’s heart rate and respiration rate. The team used those sensors on this hanging bed to gather data for the mathematical model used in this study. Credit: University of Missouri Every heart beat sends blood flowing throughout the human body. While an electrocardiogram uses a contact approach to measure the electrical activity of the heart, a ballistocardiogram is a non-contact way…

Avoiding Double Payments in a Distributed Payments System

How we built a generic idempotency framework to achieve eventual consistency and correctness across our payments micro-service architecture. Authors: Jon Chew and Ninad Khisti Background Airbnb has been migrating its infrastructure to a Service Oriented Architecture (“SOA”). SOA offers many upsides, such as enabling developer specialization and the ability to iterate faster. However, it also poses challenges for billing and payments applications because it makes it more difficult to maintain data integrity. An API call to a service that makes…

How autonomous ships can lead to safer waterways

Cargo ships waiting in the harbor at the busiest port of Singapore. Credit: iStock Even radar, navigation systems, GPS tracking and radio communications don’t prevent ships from colliding. In 2017, collisions and groundings made up nearly 40% of all marine accidents, and over half of the total casualties. These incidents were primarily caused by human error. Researchers at USC Viterbi School of Engineering are attempting to remove, or at least minimize, the need for human decision in ship navigation. They…

The history of humanity in your face — ScienceDaily

The face you see in the mirror is the result of millions of years of evolution and reflects the most distinctive features that we use to identify and recognize each other, molded by our need to eat, breath, see, and communicate. But how did the modern human face evolve to look the way it does? Eight of the top experts on the evolution of the human face, including Arizona State University’s William Kimbel, collaborated on an article published this week…

Aroma: Using ML for code recommendation

Thousands of engineers write the code to create our apps, which serve billions of people worldwide. This is no trivial task—our services have grown so diverse and complex that the codebase contains millions of lines of code that intersect with a wide variety of different systems, from messaging to image rendering. To simplify and speed the process of writing code that will make an impact on so many systems, engineers often want a way to find how someone else has…

This new invention can generate power from the softest breeze

Axy Pagan-Vasquez, a mechanical engineer with the U.S. Army Corps of Engineers, explains how low-velocity wind energy is being captured using flexible strips of material during the Department of Defense Lab Day at the Pentagon. The US Army Corps of Engineers’ Engineer Research and Development Center is developing the technology for use in conditions beyond suitable for wind turbines. Credit: EJ Hersom/DoD A patent was issued to the U.S. Army Corps of Engineers on Tuesday for a novel generator that…

Privacy-Preserving Analytics and Reporting at LinkedIn

Analytics computation workflows: The tables needed for computing different analytics about member actions are stored as part of LinkedIn’s Pinot system. Pinot is a realtime distributed OLAP datastore, designed to deliver real-time analytics with low latency in a scalable manner. Two workflows are set up to process raw tracking data (in the form of various Kafka events generated from the member-facing application, such as impressions, as well as actions, including clicks) and compute partially aggregated analytics, which are combined and…

China | Silicon Valley | China: A path less traveled

“Real knowledge is to know the extent of one’s ignorance.”― Confucius Blueprint: Don’t tell our CEO, Matthew Prince, but the first day I interviewed at Cloudflare I had a $9.00 phone in my pocket, a knock-off similar to a Nokia 5140, but the UI was all in Chinese characters—that phone was a fitting symbol for my technical prowess. At that time in my career I could send emails and use Google, but that was about the extent of my tech…

An opinionated anthropology of the embedded programmer, its habits and habitat

Illustrations by Jonas Ekman Registers! Oscilloscopes! Beards! Serial Ports! C! Cycle shaving! Beards! Interrupts! Assembly! Did I mention beards? If I were to say the words “embedded programmer” most people in our industry would immediately conjure up an image of a heroic character. A magnificent developer with arcane skills, an encyclopedic knowledge of the occult, a dubious understanding of the concept of personal hygiene, and a truly epic amount of facial hair. A godlike figure. But after studying the subject…