Systems and methods for extracting a radial contour around a given point in an image includes providing an image including a point about which a radial contour is to be extracted around. The electrical connector includes a plurality of terminals each having at one end a contact section which contacts a mating contact and having, at the other end, a connecting section which connects to a circuit board. The removed upflowing gas, known as hot bleed gas, may be ducted to the top gas scrubber of the furnace or may be mixed with the main reducing gas stream of the furnace for reintroduction to the furnace. Applications include analysis of known point mutations, genomic fingerprinting, linkage analysis, characterization of mRNAs, mRNA populations, and sequence determination. An unlocking sleeve is displaceable between a locking position and a releasing position on the second coupling element. The keyboard is constructed in two portions which may be pivoted relative to the body of the device between two positions, one in which the keyboard is hidden and the keypad of the device is exposed for normal use and a second in which the two portions of the keyboard are positioned on opposite sides of the screen of the device to allow holding with both hands and operation with the thumb.