Pressure Sensitive Non-Slip Surface Appliqu¿ for Low Drag

Within the last few years low cost ultra-high precision time delays have become available, and these now make it possible to build UWB communication systems which have no carrier frequency. The only signals transmitted are pulses. With current hardware,the pulses are ¿ nanosecond, and a typical duty cycle is 1/500. The energy of these pulses extends approximately from .5 to 4 gigahertz, and the energy content in any conventional frequency band is far below the noise. Friendly forces (cooperative targets)will carry a small TM-UWB radio which will: 1) provide a local area communication net between friendly forces within range; 2) transmit a unique pseudo random code which will provide a private channel and which will also uniquely identify the particularradio, and 3) provide an accurate range measure from the user to any other radio. TM-UWB technology will also assist in tracking non-cooperative targets inside buildings and under ground. This will be done using Synthetic Aperture and/or Phased Arraytechniques. Our partner company, Time Domain Corporation is already working on a SAR based system to be used by police for tracking motion through walls, and good results have already been demonstrated.A key opportunity for TM-UWB short range wirelessnetworks is the industrial wireless LAN market. In 1997, wired LAN equipment sales for Internet service providers alone was $18B, while wireless LAN equipment sales were a mere $213M - a gap that is beginning to close even as the market scale increases. Asan example, in the health care industry TM-UWB offers a single mechanism for wireless communication to and from mobile instruments, plus it offers the ability to track the position of each of those mobile assets. TDC has raised $70 million in privatefunds, including funds from Sony, Siemens, US West, and Marconi plus many private investors, all of which is being expended in perfecting TM-UWB.