Abstract: A method of detecting signal light integrity and viewability of a plurality of signal lights is performed by a signal light monitoring system including a plurality of signal light monitors coupled to the signal lights and a network interface communicator configured to interface the signal light monitors to a wireless network. The method includes receiving detection data from each signal light monitor, measuring a first measurement of signal light integrity, processing the first measurement of signal light integrity to determine at least one signal light integrity value, retrieving at least one performance requirement associated with the signal light monitors, comparing the performance requirement to the signal integrity value, determining whether each signal light monitor is compliant with the performance requirement, and propagating the compliance determination and the first measurement of signal light integrity over the wireless network via the network interface communicator.

Abstract: A method for training a machine for automatizing lighting control actions, wherein the method comprises the steps of: controlling one or more lighting devices to render a first light effect based on a first set of control parameters; controlling the one or more lighting devices to render a second light effect based on a second set of control parameters by transitioning over a transitioning time period from the first light effect to the second light effect; receiving a feedback from a user during a feedback time period; wherein if the feedback has been received within a predetermined time period during the feedback time period; associating the feedback with the transition; and wherein if the feedback has been received after the predetermined time period during the feedback time period; associating the feedback with the second light effect; and wherein the method further comprises training the machine based on the associated feedback.

Abstract: A method for providing uninterrupted control of a node via a segment controller; wherein the method comprises: executing a plurality of logical instances of a control application on the segment controller; detecting a malicious signal indicative of an unauthorized access request to the segment controller; determining that a logical instance which currently controls the node has been affected by the unauthorized access request; determining a logical instance, of the plurality of logical instances, which is unaffected by the unauthorized access request; switching the logical instance of the segment controller which controls the node from the affected logical instance to the unaffected logical instance.

Abstract: The present invention relates to fast start-up of powered devices (22) connected to a power sourcing equipment (10?) in a Power over Ethernet system (100). A stored voltage-current profile of an initial powering phase of a powered device (22) is provided. A voltage level provided to the powered device (22) in a subsequent initial powering phase of the powered device (22) is adjusted as long as a value corresponding to a current voltage level of a voltage-current profile of the subsequent initial powering phase deviates less than a predetermined threshold level from its corresponding value of the stored voltage-current profile of the initial powering phase of the powered device (22) and until a predetermined voltage level is reached. This can allow detecting whether a previously connected powered device (22) was replaced by another powered device (22) and to immediately start-up an unchanged powered device (22) with previously used operation parameters.

Abstract: The invention is directed to a signal-emission control device (100) for controlling emission of RF communication signals (Si) in a wireless communication network (140) that includes a transmitter device (152) and a receiver device (154). The emission is controllable with respect to a variable signal parameter (P). An emission-value ascertainment unit (102) is configured to ascertain variation-data indicative of an emission-value variation of signal-parameter values of the signal parameter. A scheduling unit (110) is configured to ascertain operation-trigger data indicative of operation conditions for triggering control of emission of the wireless RF communication signals in accordance with the ascertained emission-value. A transmitter-control unit (104) is configured to control operation of transmitter device for transmitting the communication signals (Si) according to the emission-value variation of the respective signal-parameter value upon fulfilment of the operation conditions.

Abstract: The invention is directed to a signal-emission control device (100) for controlling emission of RF communication signals (Si) in a wireless communication network (140) that includes a transmitter device (152) and a receiver device (154). The emission is controllable with respect to a variable signal parameters (P). An emission-value ascertainment unit (102) is configured to ascertain variation-data indicative of an emission-value variation of signal-parameter values. A context-data ascertainment unit (208) is configured to ascertain network-context data pertaining to the devices (152, 154) or to the communication signals (Si) provided or received by the devices (152, 154).

Abstract: The invention is directed to a signal-emission control device (100) for controlling emission of RF communication signals (Si) in a wireless communication network (140) that includes a transmitter device (152) and a receiver device (154). The emission is controllable with respect to a variable signal parameter (P). An emission-value ascertainment unit (102) is configured to ascertain variation-data indicative of an emission-value variation of signal-parameter values of the signal parameters. A transmitter-control unit (104) is configured to control operation of the transmitter device (152) for transmitting the communication signals according to the ascertained emission-value variation. Also, a receiver-control unit (106) is configured to control a provision, to the receiver device (154), of control-data (CD) indicative of the signal-parameter value used. This advantageously enables trusted receiver devices to perform RF-based activity sensing while preventing illegitimate RF-based eavesdropping.

Abstract: A method to provide secure operation of a lighting network, the lighting network comprising a lighting device arranged for illuminating an environment and a local controller for controlling the lighting device, wherein the lighting network is further controllable by an external controller, external to the lighting network, wherein the method comprises: determining a configuration status of the lighting network, analyzing the determined configuration status, switching an operational mode of the lighting network between a normal mode and a secured mode based on the analysis; wherein in the normal mode, the lighting network is operably connected to the external controller, and a light rendering function of the lighting device is being controlled by the external controller according to a predetermined set of functions, and wherein in the secured mode, the light rendering function of the lighting device is being controlled by the external controller according to a subset of the predetermined set of functions.

Abstract: A method for providing uninterrupted control of a node via a segment controller; wherein the method comprises: executing a plurality of logical instances of a control application on the segment controller; detecting a malicious signal indicative of an unauthorized access request to the segment controller; determining that a logical instance which currently controls the node has been affected by the unauthorized access request; determining a logical instance, of the plurality of logical instances, which is unaffected by the unauthorized access request; switching the logical instance of the segment controller which controls the node from the affected logical instance to the unaffected logical instance.

Abstract: A method for unlearning a learnt preference for a lighting system, wherein the method comprises: monitoring one or more feedbacks of a user during a time period, determining whether the one or more feedbacks are related to a light setting of the lighting system or not, assigning a likelihood value to the one or more feedbacks based on the determination, training the machine to learn the user's preference related to the light setting based on the monitored one or more feedbacks, rendering an inferred light setting from the trained machine, receiving a dissatisfaction input from the user indicative of a dissatisfaction level of the user related to the inferred light setting, and if the user's dissatisfaction level exceeds a threshold, removing the one or more feedbacks from the trained machine based on the likelihood value.

Abstract: System and methods are disclosed to promote safe shoving movements of a train based on train position localization without human-based track operations monitoring. Train position detectors deployed at the end of a track, in parallel to the track, between the rails of the track, or a combination thereof, localize an end-of-train during shoving movements. Each train position detector transmits an early warning alert to an onboard alert device and a handheld alert device for indicating the end of the train is about to enter a pre-configured prohibited zone. The locomotive operator receives the alert on the onboard alert device while workers in the railyard receive the alert on the handheld alert devices. Both onboard and handheld alert devices are capable of generating audio, visual, haptic, or a combination of these warning alerts for the locomotive operator and the workers in the railyard.

Abstract: A method of detecting signal light integrity and viewability of a plurality of signal lights is performed by a signal light monitoring system including a plurality of signal light monitors coupled to the signal lights and a network interface communicator configured to interface the signal light monitors to a wireless network. The method includes receiving detection data from each signal light monitor, measuring a first measurement of signal light integrity, processing the first measurement of signal light integrity to determine at least one signal light integrity value, retrieving at least one performance requirement associated with the signal light monitors, comparing the performance requirement to the signal integrity value, determining whether each signal light monitor is compliant with the performance requirement, and propagating the compliance determination and the first measurement of signal light integrity over the wireless network via the network interface communicator.

Abstract: A method for training a machine for automatizing lighting control actions, wherein the method comprises the steps of: controlling one or more lighting devices to render a first light effect based on a first set of control parameters; controlling the one or more lighting devices to render a second light effect based on a second set of control parameters by transitioning over a transitioning time period from the first light effect to the second light effect; receiving a feedback from a user during a feedback time period; wherein if the feedback has been received within a predetermined time period during the feedback time period; associating the feedback with the transition; and wherein if the feedback has been received after the predetermined time period during the feedback time period; associating the feedback with the second light effect; and wherein the method further comprises training the machine based on the associated feedback.

Abstract: A heterostructure laser is provided comprising an epitaxially grown substrate of first dopant type, an active region and layer of second dopant type, a narrow mesa having less than 20% open area and a side wall slope of less than 85 degrees, wherein said narrow mesa is etched through the active region and layer of second dopant type using in-situ MOCVD, a plurality of current blocking layers, an overclad layer and a contact layer of second dopant type, and an isolation mesa incorporating the narrow mesa, wherein the isolation mesa is etched through the active region, layer of second dopant type and plurality of current blocking layers and wherein the plurality of current blocking layers is grown without exposure to oxygen.

Abstract: A system and method is proposed to ensure detection of signal light integrity and viewability. The system includes a wireless network of signal light monitors attached unobtrusively to the sun visors on each signal light for which monitoring is required. Each signal light monitor includes diverse sensors which detect signal light integrity and viewability. The detection sensors are simultaneously active to detect signal light intensity, color intensity and viewability. The information obtained from the sensors is transmitted wirelessly to a base signal light monitor. The base signal light monitor communicates this information over a mesh network to an edge processor. The network is self-healing and ensures data integrity using a pre-calculated communication link if a communication link between base signal light monitors is lost or broken. The edge processor is capable of image and condition analysis on the detection data and communicates events to an enterprise network for action.

Abstract: A laser comprising a narrow linewidth, comprising: a grating along a laser cavity; a laser waveguide having a plurality of waveguide sections corresponding to a plurality of grating sections, each of the plurality of waveguide sections having a ridge/mesa width for detuning the grating in each of the plurality of grating sections; and a plurality of contact electrodes contacting each of the plurality of waveguide sections, the plurality of contact electrodes for applying a different current to each of the plurality of waveguide sections to enable active feedback noise suppression.

Abstract: The invention relates to implementing a factory reset to a lighting device. Thereto, the invention provides a lighting device comprising: a directional wireless receiver configured to receive a message within a time period, wherein the message comprises at least one signal comprising a factory reset command from a user device; a controller configured to implement a factory reset of the lighting device if a respective signal of said at least one signal is received within a respective predefined angular range relative to the lighting device.

Abstract: The present invention relates to fast start-up of powered devices (22) connected to a power sourcing equipment (10') in a Power over Ethernet system (100). A stored voltage-current profile of an initial powering phase of a powered device (22) is provided. A voltage level provided to the powered device (22) in a subsequent initial powering phase of the powered device (22) is adjusted as long as a value corresponding to a current voltage level of a voltage-current profile of the subsequent initial powering phase deviates less than a predetermined threshold level from its corresponding value of the stored voltage-current profile of the initial powering phase of the powered device (22) and until a predetermined voltage level is reached. This can allow detecting whether a previously connected powered device (22) was replaced by another powered device (22) and to immediately start-up an unchanged powered device (22) with previously used operation parameters.

Abstract: The train detection system comprises a wireless communication network further comprising train detection modules attached to catenary poles at the entrance and exit of the railyard. Each train detection module is equipped with a plurality of diverse sensors configured to detect trains and other on-track vehicles. The diverse sensors are simultaneously active and work together for detecting an approaching or leaving train. The train detection modules generate train alerts which are transmitted wirelessly over the wireless communication network. Each of the railyard workers wears a personal alert device capable of wirelessly connecting with the train detection modules and receiving the train alerts over the said wireless communication network. The train alert modules are capable of transmitting alerts wirelessly to personal alert devices and other train alert modules. Train alert modules are capable of generating audio visual warnings for any personnel which may not be equipped with personal alert module.

Abstract: The invention relates to implementing a factory reset to a lighting device. Thereto, the invention provides a lighting device comprising: a directional wireless receiver configured to receive a message within a time period, wherein the message comprises at least one signal comprising a factory reset command from a user device; a controller configured to implement a factory reset of the lighting device if a respective signal of said at least one signal is received within a respective predefined angular range relative to the lighting device.