Systems and methods for graphically representing a plurality of electronic messages in an electronic message repository are disclosed. The X-rays are generated by focusing an electron beam onto a fluid jet, thus producing a very small electron focus on the jet and hence a very small monochromatic X-ray spot. The upper storage has an upper opening for receiving and dispensing a life jacket that is retained within the upper storage by a securing strap. For each of a plurality of words having multiple Pinyin syllables, a data record including a key and a value is then generated. The viewing orientation controls allow a plurality of users to rotate the display or an image on the display so that the image is oriented to a specific seating position. The hydrogel polymers may deliver therapeutic entities by controlled release at the site.