Magnetic memory devices are provided, the devices include at least memory cell and a reference cell on a substrate. At least a portion of the satellite tracking data is extracted from memory and is formatted into a compact format. Each vacuum panel includes an upper area and a lower area, the upper and lower areas of each vacuum panel being mutually asymmetric and connected by a tapering geometry providing a range of pressure response through varying flexibility without significant movement of the components parts of the vacuum panels. The linear delivery system further includes properties that increase the ease of use and stability of the device so as to reduce the effort required by the physician and discomfort experienced by the patient during deployment of a detachable balloon. The ink may optionally include a volatile aqueous or non-aqueous solvent, a curing catalyst and various performance enhancing additives. The invention prevents Web site contents from being investigated by robots while not requiring users to have to log on.