Abstract: There is provided a power management method to extend the battery life of wireless routers being parts of Wi-Fi or other high-bandwidth wireless mesh networks. The method comprises the steps of connecting the clients, such as smart phones or computers, on a constant, low-bandwidth connection, using the low-bandwidth protocol/network of the routers, and to activate the high-bandwidth protocol of the router, thus providing a high-bandwidth connection to clients, only when either a request is sent by the client, or the file to transfer has a size to important to be supported by the low-bandwidth connection. There is also provided a method to minimize the power consumption of a mesh of wireless routers by activating the high-bandwidth protocol to only the routers that are located on the shortest route between the main router and the client.

Abstract: Personnel and vehicle collision avoidance devices configured to be used in collision avoidance systems are disclosed. The collision avoidance devices are configured to be aware of the context (e.g. position, location, state, status, etc.) in which the person or vehicle is. This awareness allows the devices to avoid transmitting non-hazardous proximity warnings when the context does not warrant the transmission of proximity warnings, and to transmit special critical proximity warnings when the context warrants the transmission of such proximity warnings. To detect the context, the devices comprise one or more context-awareness mechanisms (e.g. user input interfaces, sensors, infra-red receivers, etc.), each of which being capable of detecting one or more particular contexts. A collision avoidance system comprising these personnel and vehicle collision avoidance devices is also presented.

Abstract: Personnel and vehicle collision avoidance devices configured to be used in collision avoidance systems are disclosed. The collision avoidance devices are configured to be aware of the context (e.g. position, location, state, status, etc.) in which the person or vehicle is. This awareness allows the devices to avoid transmitting non-hazardous proximity warnings when the context does not warrant the transmission of proximity warnings, and to transmit special critical proximity warnings when the context warrants the transmission of such proximity warnings. To detect the context, the devices comprise one or more context-awareness mechanisms (e.g. user input interfaces, sensors, infra-red receivers, etc.), each of which being capable of detecting one or more particular contexts. A collision avoidance system comprising these personnel and vehicle collision avoidance devices is also presented.

Abstract: Personnel and vehicle collision avoidance devices configured to be used in collision avoidance systems are disclosed. The collision avoidance devices are configured to be aware of the context (e.g. position, location, state, status, etc.) in which the person or vehicle is. This awareness allows the devices to avoid transmitting non-hazardous proximity warnings when the context does not warrant the transmission of proximity warnings, and to transmit special critical proximity warnings when the context warrants the transmission of such proximity warnings. To detect the context, the devices comprise one or more context-awareness mechanisms (e.g. user input interfaces, sensors, infra-red receivers, etc.), each of which being capable of detecting one or more particular contexts. A collision avoidance system comprising these personnel and vehicle collision avoidance devices is also presented.

Abstract: A post-accident network probe and a method of using such a probe are disclosed. The probe is configured to be deployed in a confined environment (e.g. an underground mine), typically after an accident has occurred, in order to establish a connection with the wireless network, or a portion thereof, located therein. The probe generally allows the rescuers to determine the position of potentially trapped miners and can allow the rescuers to have access to environment-related information collected by the network, to get vital signs information, and/or to communicate with the trapped miners. The probe can be deployed using different access methods such as bore holes (existing or new), ventilation shafts, preventive installations of probes, etc. Notably, since the probe establishes a connection with the network, the location of the probe does not have to be exactly where the miners are located as long as the miners are tracked by the network.

Abstract: Carbonaceous coal particles, essentially free of pyritic sulphur, are removed from an aqueous coal slurry in two steps. In the first step the carbonaceous particles of the slurry, with the pyritic sulphur essentially free of surface conditioning agent, are micro-agglomerated with agglomerating oil added in an amount varying from about 0.5 wt % (dry basis), when the coal particle average size is about 100 microns, to about 10 wt % (dry basis) when the average coal particle size is about 4 microns to remove relatively coarser particles of pyritic sulphur. Then, without adding any further agglomerating oil, relatively finer pyritic sulphur particles trapped with water in the micro-agglomerates are removed.