Feed aggregator

Deals of the Day (5-22-2015)

Liliputing -

Want a 1-year subscription to Microsoft Office 365? That’ll be $70. For that price you can run the latest versions of Word, Excel, PowerPoint, Outlook, and other apps on one PC or Mac, one tablet, and one phone. You also get 1TB of cloud storage at Microsoft OneDrive. It’s not a bad deal, especially if […]

Deals of the Day (5-22-2015) is a post from: Liliputing

New Class of "Non-Joulian" Magnets Change Volume In Magnetic Field

Slashdot -

Zothecula notes an announcement from the University of Maryland saying they have developed a new class of magnets, called "Non-Joulian" magnets, which physically expand in the presence of a magnetic field. "In the 1840s, physicist James Prescott Joule discovered that iron-based magnetic materials changed their shape but not their volume when placed in a magnetic field. This phenomenon is referred to as "Joule Magnetostriction," and since its discovery 175 years ago, all magnets have been characterized on this basis." Another significant property of these new magnets is that they can harvest or convert energy with very little waste heat (abstract). The magnets are created when thermally-treated, iron-based alloys are heated in a furnace, then rapidly cooled. When they reach room temperature, they have an odd, almost cellular shape on the microscopic level. The researchers say the magnets have numerous applications for energy-efficient sensors and actuators.

Read more of this story at Slashdot.

Secure SSH with Google Authenticator Two-Factor Authentication on CentOS 7

HowtoForge - Linux Howtos and Tutorials -

SSH access is always critical and you might want to find ways to improve the security of your SSH login. In this article we will see how we can secure SSH with simple two factor authentication by using Google Authenticator. Before using it you have to integrate the SSH daemon on your server with Google Authenticator one time password protocol TOTP and another restriction is that you must have your android phone with you all the time or at least the time you want SSH access. This tutorials is written for CentOS 7.

Pages

Subscribe to debianHELP aggregator