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Category: Computer Engineering

Cloudflare supports Privacy Pass

Enabling anonymous access to the web with privacy-preserving cryptography Cloudflare supports Privacy Pass, a recently-announced privacy-preserving protocol developed in collaboration with researchers from Royal Holloway and the University of Waterloo. Privacy Pass leverages an idea from cryptography — zero-knowledge proofs — to let users prove their identity across multiple sites anonymously without enabling tracking. Users can now use the Privacy Pass browser extension to reduce the number of challenge pages presented by Cloudflare. We are happy to support this protocol…

Grads receive James Dyson Award for cancer detection device

Members of the sKan team meet James Dyson during a visit to the company’s UK Headquarters last week. Credit: McMaster University What started as a final year engineering class project at McMaster University is now an internationally recognized improved solution for the early detection of melanoma, the most dangerous form of skin cancer. Michael Takla, Rotimi Fadiya, Prateek Mathur and Shivad Bhavsar, all graduates of McMaster’s Electrical and Biomedical Engineering program, have received the prestigious James Dyson Award and $50K…

So You Have Some Clusters, Now What? – Square Corner Blog – Medium

How to Add Value to Your Clusters Written by Fan Zhang, Inna Kaler Problem One of the most common ways to apply unsupervised learning to a dataset is clustering, specifically centroid-based clustering. Clustering takes a mass of observations and separates them into distinct groups based on similarities. Figure 1: Taking a 2 dimensional dataset and separating it into 3 distinct clusters For those who’ve written a clustering algorithm before, the concept of K-means and finding the optimal number of clusters…

Qualcomm vs. Intel CPU comparison

One of the nicer perks I have here at Cloudflare is access to the latest hardware, long before it even reaches the market. Until recently I mostly played with Intel hardware. For example Intel supplied us with an engineering sample of their Skylake based Purley platform back in August 2016, to give us time to evaluate it and optimize our software. As a former Intel Architect, who did a lot of work on Skylake (as well as Sandy Bridge, Ivy…

Research could ‘untangle’ vexing problem in computer-simulation technology

Untangling quadrilateral meshes using locally injective mappings. Credit: Krishnan Suresh The computer simulations used to design, optimize, test or control a vast range of objects and products in our daily lives are underpinned by finite element methods. Finite element simulations use a mesh of geometric shapes—triangles, tetrahedra, quadrilaterals or hexahedra, for instance. These shapes can be combined to form a mesh that approximates the geometry of a model. For example, meshes can be used to model the human knee in…

Adding card on file details with Python – Square Corner Blog – Medium

Attaching a customer’s card on file to their Square profile is an important part of setting up recurring payments. Here’s how to do it with Python. In this post we’ll be using the CustomerCard endpoints to add a card on file to a customer that you could then use for subscription billing online or in-person. But remember, you should not link a card on file to a customer without the customer’s express permission. For example, you can include a checkbox in…

Convert Website Traffic into Leads with these 5 Tips

Digital marketing is one of the best ways to advertise and market your company in today’s world. With the growing popularity of the internet and then using it as a platform to showcase your company, digital marketers are finding it easy to create a presence on the internet. But at the same time due to the constant use of the internet as a channel for promoting a company, it is growing increasingly difficult to create a lot of hype for…

Perfect locality and three epic SystemTap scripts

In a recent blog post we discussed epoll behavior causing uneven load among NGINX worker processes. We suggested a work around – the REUSEPORT socket option. It changes the queuing from “combined queue model” aka Waitrose (formally: M/M/s), to a dedicated accept queue per worker aka “the Tesco superstore model” (formally: M/M/1). With this setup the load is spread more evenly, but in certain conditions the latency distribution might suffer. After reading that piece, a colleague of mine, John, said:…