Abstract: The invention relates to a method (3000, 4000) for planning and managing maintenance, repair and overhaul work on a vehicle of a transportation system comprising a network which includes the following network components: at least one vehicle 202, a log book 202E, 549 assigned to the at least one vehicle 202, accessories 203, 204, 541, 543, 546, at least one first terminal 203E, 204E, 542, 544, 547 assigned to the accessories, at least one second terminal 203E, 204E, 542, 544, 547 assigned to the accessories, said method comprising the steps of: e) transmitting data defining accessory needs from the log book 202E, 549 into the network, f) receiving the data at the first and the second terminal 203E, 204E, 542, 544, 547, g) bidirectional communication among the network components, h) assigning the maintenance, repair and overhaul work, i) providing feedback after completion of the maintenance, repair and overhaul work, wherein said assigning and said providing of feedback are performed by at least one

Abstract: An aqueous dispersion having a pH value of between 3 and 7 containing 1 to 35 wt. % of a pyrogenically produced silicon-aluminium mixed oxide powder with a specific surface area of 5 to 400 m2/g, wherein the proportion of aluminium oxide in the powder is between 90 and 99.9 wt. % or between 0.01 and 10 wt. %, the surface of the powder comprises zones of aluminium oxide and silicon dioxide and the powder exhibits no signals for crystalline silicon dioxide in an X-ray diffractogram. Said dispersion may be used for the chemical-mechanical polishing of conductive, metallic films.