The present invention relates to lightweight collapsible portable chairs. First and second transmitreceive switches, each include an on-chip microelectromechanical switch, and each respond to their corresponding control signal to implement either the transmit mode or the receiver mode. The amplication factor is determined by minimizing the value E=*f1+a*f2, the weighting factor a being determined taking into account both the periodicity and the stationarity of the encoded speech signal. Further, the disclosed heat transfer decorating machine is capable of labeling filled and chilled articles by providing for removal of environmental contamination prior to application of the labels. This structure increases efficiency by decreasing the loss of exerted energy when peddling at dead spots, which dead spots are the common terminology used to refer to when the legs are either at down-stroke and up-stroke positions. When authorized, payment is guaranteed to the payee from the issuer.