A cube is one of the simplest solids one can imagine. Over the course of this article I'll try to explain how to expand it to the next dimension to obtain a tesseract -- a 4D equivalent of a cube.

As covid-19 has spread around the world, people have become grimly familiar with the death tolls that their governments publish each day. Unfortunately, the total number of fatalities caused by the pandemic may be even higher, for several reasons. First, the official statistics in many countries exclude victims who did not test positive for coronavirus before dying — which can be a substantial majority in places with little capacity for testing. Second, hospitals and civil registries may not process death certificates for several days, or even weeks, which creates lags in the data. And third, the pandemic has made it harder for doctors to treat other conditions and discouraged people from going to hospital, which may have indirectly caused an increase in fatalities from diseases other than covid-19.

One way to account for these methodological problems is to use a simpler measure, known as "excess deaths": take the number of people who die from any cause in a given region and period, and then compare it with a historical baseline from recent years. We have used statistical models to create our baselines, by predicting the number of deaths each region would normally have recorded in 2020.

The Sweden Solar System (SSS) is the world’s largest model of our planetary system. The Sun is represented by the Globe in Stockholm, the largest spherical building in the world, and the planets are lined up in direction north from here.

Distances and sizes are scaled according to 1:20 million, and the inner planets are all in the Stockholm area. The outer planets follow in the same direction with for instance Neptune in Söderhamn and the dwarf planet Pluto in Delsbo, 300 km from the Globe. A number of minor planets and comets also populate SSS, which now extends from the very south to the very north of Sweden. There is a host institution for each model. SSS is a pedagogical instrument and conveys a direct feeling of the enormous distances in space, and how small the planets are compared to the Sun. Art, mythology and science merge in this project, and SSS connects to different places and activities in Sweden.

Which are the best supplements to take to enhance your health and wellbeing? We visualised all evidence for all health supplements in one chart. Now regularly updated with revitalising boosts of fresh data.

Humans have gotten a lot done in 300,000 years: We invented agriculture, developed writing systems, built cities, created the internet, and shrugged off gravity to land on the moon. These innovations make our past seem long—and stuffed with significance. But in the brief history of life, everything we’ve ever accomplished fits into a tiny sliver of time—just 0.008 percent of the entire continuum shown below. This is how the rise of the animal kingdom stretches out compared with our relatively insignificant existence.

A web-based notebook that enables interactive data analytics. You can make beautiful data-driven, interactive and collaborative documents with SQL, Scala and more.

Profiling data can be thousands of lines long, and difficult to comprehend. Flame graphs are a visualization for sampled stack traces, which data allows hot code-paths to be identified quickly. See the Flame Graphs main page for uses of this visualization other than CPU profiling.

Flame Graphs can work with any CPU profiler on any operating system. My examples here use Linux perf_events, DTrace, SystemTap, and ktap. See the Updates list for other profiler examples, and github for the flame graph software.

The LedBorg provides a tri-colour LED controllable from the Raspberry Pis GPIO header. Using simple on / off logic it can provide a total of seven colours as well as off. Using software based pulse width modulation (PWM) it is capable of many more colours, around a million in fact.

In this article we'll explore a neat way of visualizing your MP3 music collection. The end result will be a hexagonal map of all your songs, with similar sounding tracks located next to each other. The color of different regions corresponds to different genres of music (e.g. classical, hip hop, hard rock). As an example, here's a map of three albums from my music collection: Paganini's Violin Caprices, Eminem's The Eminem Show, and Coldplay's X&Y.