A user station configurable for use in a healthcare communication system, such as a nurse call system, is provided. The gas field ion source includes an emitter unit, a cooling unit, and a thermal conductivity unit for thermal conductivity from the cooling unit to the emitter unit, wherein the thermal conductivity unit is adapted for reduction of vibration transfer from the cooling unit to the emitter unit. A method of manufacturing a TFT-LCD is also disclosed. The perforation slot has a few interleaved positioning fillisters along the slide way. Exemplary applications include image compression, where categories include image foreground and background layers.