Kate's Comment

Thoughts on British ICT, energy & environment, cloud computing and security from Memset's MD

Programming B.O.B (Lego Mindstorms NXT) in not-exactly C on MacOS / OSX

My true first beginnings as a hacker were with Lego technics. I was very lucky that my Dad got me one of the very first systems for controlling Lego from a computer back in the late 80’s. At the time it was only officially available for schools, but he pulled some strings. Lego Mindstorms NXT My childhood love of Lego…

Hacking Britain’s Recovery

As we enter 2012, and the world economy continues to stutter, teetering on the brink of another global recession fuelled this time not by the banks defaulting, but the prospect of entire governments being declared bankrupt. In my last post I described how I believe that the time is nonetheless ripe for a technology revolution, and indeed one befitting times…

The Next Revolution: Internet of Things

Over Christmas I have been pondering on the question of what the next big thing in technology will be, specifically in 2012. That question is perhaps especially poignant since we recently we lost one of our generation’s great innovators, Steve Jobs. When I recently took delivery of my magic mouse I was struck by how aptly it was named. If…

Energy of downloads

The music and movies industry are keen to tell us how enormously energy intensive downloading media can be. But just how much energy does get used when you download stuff from the Internet? I plugged some numbers from our data centre into my calculator to find out! The answer? About 5.9 Watt-hours per Megabyte, but as little as 1.8 Wh/MB for some configurations.

IaaS vs. PaaS vs. SaaS definition

One of the areas on which we reached clear agreement in the G-Cloud and App Store phase 2 was the definition the layers of the stack, infrastructure, platform and software, and their corresponding scalable, standardised counterparts: infrastructure as a service (IaaS), platform as a service (PaaS) and software as a service (SaaS). Pleasingly, our delinations were very similar to prior work from two decades ago by IBM, except that ours incorporate virtualisation.

Embedded energy of servers & PC’s

Over the last two years there has been a lot of debate about what the embedded energy of a PC or server is compared with how much power it uses. I have crunched the numbers and believe that the figure for a server is about 1,000,000 Watt-hours (1MWh). Here is how I worked it out, and why it means that you should sweat the desktops but replace the servers.