Abstract: A dispatch control system includes a data store with records of previously-attended geographical positions of a mobile unit indicating at least a duration of attendance. The dispatch control system is configured to calculate one or more stochastic characteristics for the durations of attendance representative of a variability of the durations of attendance at said past geographical positions, and generate data indicative of an order of attendance for the mobile unit based on travel and estimated durations of attendance. This data is re-ordered and volatility metrics for each set of modified data are determined. The set of volatility metrics is used to modify the data indicative of an order of attendance for the mobile unit. The dispatch control system is configured to transmit to the mobile unit data indicative of geographical positions corresponding to said modified generated data for use in generating routing instructions.

Abstract: Examples are described relating to control of a geographical position of a mobile unit in time. In one example, a dispatch control system is provided. The dispatch control system has a data store with records of previously-attended geographical positions. These records indicate at least a duration of attendance. The dispatch control system is arranged to calculate one or more stochastic characteristics for the durations of attendance based on the records stored in the data store, the one or more measured stochastic characteristics being representative of a variability of the durations of attendance at said past geographical positions. It is also arranged to generate data indicative of an order of attendance for a mobile unit based on travel and estimated durations of attendance. This data is re-ordered and volatility metrics for each set of modified data are determined. The set of volatility metrics is used to modify the data indicative of an order of attendance for a mobile unit.

Abstract: A system is described that has a first engine configured to determine an assignment of a resource to a task. The assignment is based on a schedule representation comprising at least resource profile data and task profile data. The resource profile data represents a resource profile associated with the resource and the task profile data represents a task profile associated with the task. The system also has a data store configured to store a set of rules, the set of rules comprising data indicative of one or more functions to be applied to one or more input data sources to output at least one variable value for the schedule representation. This then allows a second engine coupled to the data store to be configured to update the schedule representation in accordance with the set of rules.

Abstract: A collapsible roof curb includes a base portion having opposed end walls and opposed side walls extending between the end walls, and an upper portion having opposed upper end walls and opposed upper side walls. The roof curb also includes a hinge connecting each of the end walls of the base portion to the end walls of the upper portion and the side walls of the base portion to the side walls of the upper portion, the hinges being adapted to allow the end walls and side walls of the upper portion to pivot from a collapsed position to an extended position.

Abstract: A collapsible roof curb includes a base portion having opposed end walls and opposed side walls extending between the end walls, and an upper portion having opposed upper end walls and opposed upper side walls. The roof curb also includes a hinge connecting each of the end walls of the base portion to the end walls of the upper portion and the side walls of the base portion to the side walls of the upper portion, the hinges being adapted to allow the end walls and side walls of the upper portion to pivot from a collapsed position to an extended position.

Abstract: Evolution of an hydrocarbon reservoir in the process of producing is carried out by co-analyzing the changes in the propagation times and seismic amplitudes of a seismic wavelet along propagation paths in the ground. A base survey of the reservoir is provided, with a set of seismic traces at a first time T associated to a first velocity field Vb; a monitor survey of the reservoir is provided, the monitor survey being taken at a second time T+?T, with a set of seismic traces associated to the same positions as in the base survey; the monitor survey is associated to a second velocity field Vm.

Abstract: Evolution of an hydrocarbon reservoir in the process of producing is carried out by co-analyzing the changes in the propagation times and seismic amplitudes of a seismic wavelet along propagation paths in the ground. A base survey of the reservoir is provided, with a set of seismic traces at a first time T associated to a first velocity field Vb; a monitor survey of the reservoir is provided, the monitor survey being taken at a second time T+?T, with a set of seismic traces associated to the same positions as in the base survey; the monitor survey is associated to a second velocity field Vm.

Abstract: A low profile camouflaged antenna for military vehicles and the like. The tenna comprises an elongated, typically rectangular, sheet of metal curved to conform to the curvature of the vehicle. Insulated spacers, for example of plastic or fiberglass, maintain a fixed spacing between the metal plate and the vehicle, thus forming two elongated slots which, when suitably energized, act as a dual-slot antenna.