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What sets the Rover apart is that information can flow back to the operator from the robot along the same path in reverse This information is in the form of a color video image from a camera mounted on the front of the robot, sounds coming from the vicinity of the robot, and sensor input from infrared proximity sensors mounted on the robot The sensor input returned from the proximity sensors is manipulated in software and fed back into the joystick held by the operator In this way, the operator can see what the robot sees, hear what it hears, and feel what it feels Each sense the operator can have from the robot makes for better teleoperation Because the robot can only see forward, at times the operator may have to feel an obstruction as the robot backs up during navigation By adding the sense of touch, the operator could feel the obstruction behind it before it even hits it Since the infrared detector can detect the object from a distance of 6 inches, the software can make the joystick provide increasing resistance to moving back as the obstruction approaches that is, it gets harder and harder to drive the robot back into the obstruction as the robot gets closer to the obstruction You could call this driving by Braille, as the sense of touch is being simulated and vision is not being used In a combat robot, you will be able to see the environment around the robot, but what about what is happening inside the robot Is a motor overheating, are the batteries going dead, did one of your drive chains break It would be nice to know if your robot is about to have an internal failure before it happens so you can initiate corrective actions during the match Or, if your robot isn t moving correctly, you might be able to remotely fix the problem if you knew its cause, or alter the driving of the robot to protect a weak side Without feedback, you can easily turn a minor problem into a major problem.

Whenever the concept of the competitive environment enters a discussion, two other discussions ensue: the wireless local loop and the use of local multipoint distribution services This chapter will look at some of the movement in this area, so that an understanding of how and why the last mile has become so critical in meeting the demands for higher-speed broadband communications Moreover, when looking at the incumbent Local Exchange Carriers copper-based plant, one can only marvel at the lack of foresight in fending off the competition The LECs have always been in control of the last mile, and invested heavily in the copper-based plant they use Given the unshielded, twisted-pair wiring scheme and the band-limited channel capacity they deliver, one would expect them to write the cabling systems down (depreciate) as quickly as possible Yet, to keep their costs competitively low, they have chosen the opposite route Instead of fast depreciation, the LECs use a 20 30 year depreciation schedule on their cables What this boils down to now is a cable plant that has not kept pace with the demands of the user and is still on the books for the provider This is a problem for the carriers because they can ill afford to walk away from the cables in place, yet they have to breathe new life into an infrastructure that is limited in capacity Moreover, the existing cable plant is prone to noise and disruption as a matter of course A graphic representation of the local loop and some trouble spots is shown in Figure 18-1

One of the most powerful methods of reporting is to use the matrix control to allow end users to examine lower levels of data in a report, using the rough equivalent of the expansion functionality found in ProClarity This can be accomplished by adding multiple levels from the same dimension to either the rows or the columns The lower levels of detail are hidden by default and the end user can reveal them by clicking a plus sign next to the higher level member

As one discusses the possibility of the LEC having an inherent problem, there are several areas under attack at this last mile Already discussed in earlier chapters was the use of the local cable TV operation s cable to carry voice and data communications However, there are many areas that are being considered as competitive local loop concepts, as seen in Table 18-1 Table 18-1: Multiple areas of competition at the local loop Competitor CATV Companies CATV Companies Concept Cable TV for voice and Internet access Fiber to the Curb, Coax to the door for data and voice plus entertainment Broadband PCS as a single number for all wireless voice, paging and data access Broadband voice and data services on wireless local loop Technology Cable modem technology Hybrid Fiber/Coax (HFC), Fiber to the Curb (FTTC) PCS on TDMA and CDMA or GSM