MySQL system gained the reputation as the most efficient and speedy tool in managing databases long time ago. This system enables the creation and management of huge quantity of data which are supported by the multilevel and multipurpose charts. Oracle Company (the owner of MySQL) is making great strides in the development and improvement of new version of the system.Several days ago Oracle introduced the new working MySQL 5.6 version of the system which is still in the development stage. No one dares to assume about the exact date of the final version release, but it’s definitely clear that Oracle will not delay the launch. The working version of MySQL 5.6 is replenished with the variety of new integrated options which make the system more effective and user-friendly.
Nowadays there are a lot of companies that employ MySQL as their core tool in creating and supporting of middle-size and large-size projects. Facebook, Flickr, and Twitter utilize the very system in their …
Introduction 
Evaluating the effectiveness of modern computer power supplies, the most attention is paid to their coefficient of performance (COP) at a given load — usually means of 20%, 50% and 100%. At the same time, not less important requirement, established by standard 80PLUS should be considered. That means — the preservation of this level of performance for all occurring in the world supply voltage variations, that is in the range of 100-240 V.