A hinge device increases an open angle of a second member relative to a first member without enlarging the hinge device. A definition attribute obtaining unit, control attribute obtaining unit and stress obtaining unit obtain parameter names usable for calculating a strength value and stress value, based on the definition attribute name. The methods and devices employ insect repellents such as pyrethroids at low levels. When the retainer is in the first closed position, the receptacle is generally flat and wide. The focal length of the camera is selectively adjusted as a function of the distance of the target object from the camera.