A method for compressing image data that are processed by a pseudo gradation process using a dither pattern is provided. The foam dielectric layer has a dielectric constant greater than a solid non-porous dielectric constant of the same material, the use of which increases the partial discharge inception and extinction voltage levels, provides vibration resistance, decreases inductance and the like. The various types of information can be accessed by users via a software interface. The air supply solenoid valve controls the flow of pressurized air to the air space, and the air exhaust solenoid valve controls the flow of air from the air space to atmosphere. The gaming system uses the data gathered from the seeding source associated with the player’s picked selection to determine one or more seeds. In one embodiment, a device for distending a blood vessel of a human or animal is provided which comprises a stretching mechanism attachable directly to a blood vessel at at least two attachment positions thereon, and a means for operating the stretching mechanism to cause the blood vessel portion between said at least two attachment positions to be stretched axially.