A heat dissipation device includes two heat sinks mounted on two electronic components which is mounted within a server, two fans mounted on a mounting plate of the server facing the heat sinks for blowing cooling air to the heat sinks, and a fan duct. The magneto-optical head further includes a flexible printed circuit sheet bonded to the second surface of the transparent substrate, the flexible printed circuit sheet having an opening for insertion of the objective lens unit, a pair of conductor patterns, and a pair of second electrodes respectively formed at first ends of the conductor patterns. The invention titled Fridge Freshener and Food Saver is about a gadget to sprinkledisperse the baking soda in the environment where-in it is intended to be applied viz. The plug is inserted into the opening until a rear surface of the plug loosely contacts a parallel inner wall and an outer surface of the plug is slightly misaligned or moved inwardly from a front surface of the wall. Other embodiments, method and apparatus and described as well. One or more concepts are associated with the query based at least in part on the results of the density function.