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Category: Electronics Engineering

Serving 100 Gbps from an Open Connect Appliance – Netflix TechBlog – Medium

By Drew Gallatin In the summer of 2015, the Netflix Open Connect CDN team decided to take on an ambitious project. The goal was to leverage the new 100GbE network interface technology just coming to market in order to be able to serve at 100 Gbps from a single FreeBSD-based Open Connect Appliance (OCA) using NVM Express (NVMe)-based storage. At the time, the bulk of our flash storage-based appliances were close to being CPU limited serving at 40 Gbps using single-socket…

Physical abuse and punishment impact children’s academic performance — ScienceDaily

A Penn State researcher and her collaborator found that physical abuse was associated with decreases in children’s cognitive performance, while non-abusive forms of physical punishment were independently associated with reduced school engagement and increased peer isolation. Sarah Font, assistant professor of sociology and co-funded faculty member of the Child Maltreatment Solutions Network, and Jamie Cage, assistant professor in Virginia Commonwealth University’s School of Social Work, found that children’s performances and engagement in the classroom are significantly influenced by their exposure…

UV-irradiated amorphous ice behaves like liquid at low temperatures — ScienceDaily

Ice analogs mimicking interstellar ice behave like liquids at temperatures between -210°C and -120°C according to Hokkaido University researchers. This liquid-like ice may enhance the formation of organic compounds including prebiotic molecules and the accretion of dust to form planets. Molecular bonds in the ice are severed when irradiated by ultraviolet light inside interstellar molecular clouds, facilitating the formation of complex organic substances including prebiotic molecules. Thus, scientists believe interstellar ice to be “cradles” of organic compounds, but little has…

Let’s Encrypt & App Engine, pt. 2 – Square Corner Blog – Medium

The easier way to renew Let’s Encrypt certificates on an app engine site For more background on using Let’s Encrypt with Google’s App Engine, read the original post Setting up https for your website When it came time to renew my Let’s Encrypt certificates for Google’s App Engine, I wanted to see whether I could improve the process. For my first attempt, I tried out the DNS verification method. I updated the appropriate TXT records for my domain, but either wasn’t…

Analyzing distributed trace data – Pinterest Engineering – Medium

Brittany Herr | Pinterest engineering intern Naoman Abbas | Pinterest engineer, Visibility Earlier this year we open sourced Pintrace, a distributed tracing pipeline. A trace follows a request as it moves through a backend, tracking where and how it spends its time. Traces are made up of spans, each of which represents an operation. At Pinterest, there are tens of services and hundreds of network calls per-trace. The information from distributed tracing provides deep visibility into what goes on in our…

Handling System Failures during Payment Communication

Handling system failures during payment processing requires real-time identification of the issues in addition to offline detection, with the goal of eventual consistency. No matter what goes wrong, our top priority is to make sure that customers receive service for which they’ve been charged, and aren’t charged for service they haven’t received. Accurate payment processing is a crucial element in being worthy of trust, a core Dropbox company value. In a standard system of this kind, failures might result in…

Why We Built Cloudflare Workers

It all comes down to the speed of light. It always does. The speed of light limits the latency possible between someone using the Internet and the application they are accessing. It doesn’t matter if they are walking down the street hailing a car using a ride-sharing app, sitting in an office accessing a SaaS application on the web, or if their wearable device is reporting health information over WiFi. The speed of light is everywhere. When you can’t fight…

Researchers develop smart tattoos for health monitoring

Smart tattoo ink changes color to monitor dehydration and blood sugar. Credit: HMS Harvard and MIT researchers have developed smart tattoo ink capable of monitoring health by changing color to tell an athlete if she is dehydrated or a diabetic if his blood sugar rises. The work, conducted by two postdoctoral fellows at Harvard Medical School and colleagues led by Katia Vega at MIT’s Media Lab, paired biosensitive inks developed at Harvard with traditional tattoo artistry as a way to…

Importance of GPS Phone Tracker

With modern technology, it’s now possible to do many things on mobile phones and smartphones. Apart from the obvious convenience of being able to call colleagues and friends whilst on the move, smartphones can also be vital tools for use in business and commerce. But did you know that your smart phone’s built-in GPS receiver can also help you stay safe, avoid getting lost and find your way to that crucial meeting on time? By using a combination of GPS…

Tips From a GHC Vet – Square Corner Blog – Medium

This will be my sixth year attending Grace Hopper. I have seen it grow from a small conference to over 10,000 employees. Square recently hosted a kick-off event where I talked through what I learned over the past couple of years. This post is meant to provide some tips and tricks for getting the most out of your experience. Before Upload your resume to the database. The database is already open, but if you plan on talking to companies at…