Archive | October, 2009

Flying weather = whether we go flying

Having now completed just a little over 8hrs as PUT (Pilot Under Tuition), I’m starting to take more notice of the weather than even your average Englishman. I recently started flying circuits, and it was apparent that some further study was required on my understanding of the weather. Meteorology is a huge topic, so today I’m just looking at one of the tools we can use to determine the winds we are likely to encounter en-route. Read More…

Logo design considerations

One of the things to consider when designing a logo is how it is likely to be reproduced, as this can have a huge impact on cost further down the road. This article deals with why we advise customers in a particular direction when designing identities. Read More…

How to determine Linux Memory Usage?

Free memory on Linux is a very different world to the one that most people would be used to. For years windows users have installed odd bits of memory management software in a desperate bid to see the biggest green segment of the memory pie chart. Well, it can be argued that any good operating system SHOULD make full use of the installed memory. Why continually unload and de-allocate memory when you are probably just going to have to load it up again shortly after?

The Linux kernel uses something known as lazy de-allocation – which means that although the memory pages may not be used, they are left un-wiped from memory in case they are needed again. Think about common linked libraries and such. Linux only keeps a few pages of memory actually free, so that it has the ability to load stuff quickly, and THEN think about de-allocating memory to make more space if it has to. Read More…