A pulsemeter built with a Raspberry Pi, a digital-to-analog converter, and an optical sensor monitors your heart rate just as well as many far more expensive medical devices.

Software projects often comprise several code branches, some of which exist in parallel. Git supports community code development through remote repositories and code branching.

I get this familiar feeling whenever an election year rolls around. I guess it is kind of like despair mixed with something more proactive, like maybe annoyance. I'm not talking about politics exactly, although I will admit that politics get pretty annoying. What really concerns me now is the backward nature of voting technology and the sense that nothing ever gets done about it.

Want to participate in the scientific revolution? BOINC lets you lend your spare computer cycles to data analysis efforts for NASA and other science institutions.

Swapnil sorts through the complex relationships of CentOS, Fedora, and RHEL with Red Hat's Jim Perrin.

Maddog gives a brief history of the last (almost) half century of *x, plus a call for spreading the love.

At a party with 23 guests, having two guests with the same birthday in more than 50 percent of cases may sound fairly unlikely to amateur mathematicians. Armed with statistical methods, party animal Mike Schilli sets out to prove this claim.