Centroid locating sensors and methods for locating an illuminated spot on a detector are provided. The device facilitates the flashing of liquid refrigerant pumped to the compressor which, in turn, assists to cool the compressor head. The graphical proxy server includes a graphical server and a terminal management system. The notched broadleaf stem holder may be supported on a table or a transportation device by means of a broadleaf stem holder support. In this way, the indication may be utilized to display the digital item in the user identification profile. The slot line resonator forms a microstrip line inputting microwaves so as to be orthogonal to a slot line with a dielectric substrate being sandwiched therebetween.