Abstract: A residual current device (RCD) comprises test circuitry which issues intermittent first test pulses each simulating a residual current fault for which a corresponding fault signal is generated. In the case of a fault in which a corresponding fault signal is not received in respect of a first pulse, the RCD attempts to force the load contacts open. The test circuitry further issues intermittent second test pulses at a frequency less than that of the first test pulses, each second test pulse simulating a residual current for which a corresponding fault signal is generated. The duration of each corresponding fault signal is greater than the response time of the load contacts to allow the load contacts to open. If the test circuitry detects that the load contacts do not open, the RCD attempts to force the load contacts open.

Abstract: A residual current device (RCD) comprises test circuitry which issues intermittent first test pulses each simulating a residual current fault for which a corresponding fault signal is generated. In the case of a fault in which a corresponding fault signal is not received in respect of a first pulse, the RCD attempts to force the load contacts open. The test circuitry further issues intermittent second test pulses at a frequency less than that of the first test pulses, each second test pulse simulating a residual current for which a corresponding fault signal is generated. The duration of each corresponding fault signal is greater than the response time of the load contacts to allow the load contacts to open. If the test circuitry detects that the load contacts do not open, the RCD attempts to force the load contacts open.

Abstract: A system and method for providing updates to medical devices is disclosed. In one example, the medical devices are configured to pull update files in response to the reception of an update message from a server. Once the update files are downloaded by a medical device, the update files can be installed. While the medical device pulls the update files, the medical device can continue with its normal operation. If desired, a user can select which medical devices should be updated, based on any desired factors, such as the physical location of the device, the model of the device, the type of device, and the way the device is being used.

Abstract: Centralized systems execute one or more applications for monitoring and operating a plurality of network enabled medical devices. An indication to start a selected application at the centralized system or at a network enabled medical device is received at the centralized system/network enabled medical device. The selected application may require a license to operate and, at the time the indication is received, may have a first license available. Instead of using the first license, the centralized system/network enabled medical device may determine to inherit at least a portion of a second license to operate the selected application. The centralized system/network enabled medical device may inherit at least the portion of the second license to form an inherited license, where the inherited license enables features of the selected application. Using the inherited license, the selected application is started with the enabled features. Related apparatus, systems, techniques and articles are also described.

Abstract: A system and method for providing updates to medical devices is disclosed. In one example, the medical devices are configured to pull update files in response to the reception of an update message from a server. Once the update files are downloaded by a medical device, the update files can be installed. While the medical device pulls the update files, the medical device can continue with its normal operation. If desired, a user can select which medical devices should be updated, based on any desired factors, such as the physical location of the device, the model of the device, the type of device, and the way the device is being used.

Abstract: An elevated seat for a kayak. A floor of the kayak generally defines a reference plane. The seat may include a first support bar configured to be releasably attached to the kayak at a first location and a second support bar configured to be releasably attached to the kayak at a second location spaced along a bow-stern direction of the kayak relative to the first location. The seat may also include a seating member extending from a distal end of the first support bar to a distal end of the second support bar. The seating member may be inclined at a non-perpendicular angle relative to the floor. When in use, the first and second support bars are configured to position the seating member above the floor by a sufficient distance to support a user substantially standing on the floor.

Abstract: Centralized systems execute one or more applications for monitoring and operating a plurality of network enabled medical devices. An indication to start a selected application at the centralized system or at a network enabled medical device is received at the centralized system/network enabled medical device. The selected application may require a license to operate and, at the time the indication is received, may have a first license available. Instead of using the first license, the centralized system/network enabled medical device may determine to inherit at least a portion of a second license to operate the selected application. The centralized system/network enabled medical device may inherit at least the portion of the second license to form an inherited license, where the inherited license enables features of the selected application. Using the inherited license, the selected application is started with the enabled features. Related apparatus, systems, techniques and articles are also described.

Abstract: A system and method for providing updates to medical devices is disclosed. In one example, the medical devices are configured to pull update files in response to the reception of an update message from a server. Once the update files are downloaded by a medical device, the update files can be installed. While the medical device pulls the update files, the medical device can continue with its normal operation. If desired, a user can select which medical devices should be updated, based on any desired factors, such as the physical location of the device, the model of the device, the type of device, and the way the device is being used.

Abstract: In accordance with one aspect of the invention a testing procedure, a processing procedure and a resulting product are provided whereby sewage sludge is primarily or firstly pre-hydrolysed in whole or in part by means other than alkali. The alkali is then added to the pre-hydrolysed product. The pre-hydrolysed product from step one has a reduced potential for further hydrolysis and is more effectively stabilized in step 2 as a liquid biosolids-containing product or BSP. As a result, in accordance with the invention less of the alkali is used up in the step 2 further alkali-based hydrolysis of the pre-hydrolysed product. The pH of the BSP product after the step 2 alkali treatment drops less over the period of storage and the BSP product will be better preserved against microbial regrowth.

Abstract: Paunch-sludge from an abattoir is mixed with the fatty DAF-float from an abattoir, and placed in a shearing vessel. The mixture of the two material thickens the medium in which the matted strands are contained, enabling shearing to be more effective; so much so that paunch-sludge can now be sheared to a homogeneous liquid. The technique can be used with other sludges and other fatty waste materials.

Abstract: An elevated seat for a kayak. A floor of the kayak generally defines a reference plane. The seat may include a first support bar configured to be releasably attached to the kayak at a first location and a second support bar configured to be releasably attached to the kayak at a second location spaced along a bow-stern direction of the kayak relative to the first location. The seat may also include a seating member extending from a distal end of the first support bar to a distal end of the second support bar. The seating member may be inclined at a non-perpendicular angle relative to the floor. When in use, the first and second support bars are configured to position the seating member above the floor by a sufficient distance to support a user substantially standing on the floor.

Abstract: A residual current device (RCD) comprises test circuitry which issues intermittent first test pulses each simulating a residual current fault for which a corresponding fault signal is generated. In the case of a fault in which a corresponding fault signal is not received in respect of a first pulse, the RCD attempts to force the load contacts open. The test circuitry further issues intermittent second test pulses at a frequency less than that of the first test pulses, each second test pulse simulating a residual current for which a corresponding fault signal is generated. The duration of each corresponding fault signal is greater than the response time of the load contacts to allow the load contacts to open. If the test circuitry detects that the load contacts do not open, the RCD attempts to force the load contacts open.

Abstract: A fluid flow control device controls flow of fluid in a capillary pathway device having a first capillary passage with an inlet and an outlet and a fluid application region for receiving a liquid sample for entry to the capillary passage via the inlet, with the fluid flow control device comprising first sealing means operable for releasably sealing the outlet of the first capillary passage.

Abstract: The invention relates to a sample testing device for conducting a heterogenous assay, for example an ELISA, in a capillary lumen, using one way flow of sample and wash buffer to move the reaction through the binding, separation and signal measurement steps, thus minimising external intervention. The capillary passage is configured to allow time within different zones for reaction, capture, separation of bound and free fractions, and signal measurement. A combined capture-signal read zone is provided to maximise the capture of signal linked binding member, and signal measurement within the capture zone.

Abstract: A fault detecting device having a plurality of supply conductors, including a first current transformer having a primary winding comprising at least two supply conductors and a secondary winding into which a current is induced in response to a fault current in the primary winding. A fault detection circuit connects the secondary winding to an electromechanical actuator having mechanical contacts in the supply conductors, the fault detection circuit generating an output signal to the actuator when an induced current is detected in the secondary winding, the output signal causing the actuator to open the mechanical contacts. The device further includes a second current transformer having a primary winding connected to an oscillator and a secondary winding comprising at least one supply conductor, the second current transformer arranged to induce an oscillating current into the at least one supply conductor in the event of a fault condition.

Abstract: A cart system for a watercraft, a watercraft with the cart system, and a method of transporting a watercraft using the cart system. The cart system has a skid plate configured to be fixedly mounted to a hull of the watercraft, and a wheeled cart removably attachable to the skid plate. The skid plate remains attached to the hull during use of the watercraft in the water. The wheeled cart is attached to the skid plate during launch of the watercraft and the wheeled cart is removed from the skid plate during use of the watercraft in the water.

Abstract: When liquefying sludge, e.g as in U.S. Pat. No. 6,808,636, the combination of temperature, pH, and shearing, is synergistic. Described here is a system that provides for collating test sampling and full-scale data inputs, recording achieved results and the engineering parameters that achieved those particular results. The data is presented in e.g a table format, which assists design engineers to zero-in on the combinations of parameters that will likely give the desired results.

Abstract: A leakage current detector for an electricity supply comprising a plurality of supply conductors supplying a load, the leakage detector comprising a connection from each supply conductor to a common conductor, a circuit for detecting a differential current flowing in the connections, and a circuit arranged to provide an output signal when the differential current reaches a predetermined magnitude.

Abstract: Disclosed adjustable seat systems that provide a self-contained height-adjustable seat system for sit-on-top kayaking that allows the seat to be adjusted into various height and angle positions, while maintaining independent adjustment to the fore/aft position of the seat in the kayak. Some of the adjustable seat systems include a seat upper that includes a seat bottom and a seat back; a seat base adapted to slidably engage a flat surface in the watercraft; and at least two pivot mechanisms coupling the seat upper to the seat base, wherein the at least two pivot mechanisms allow the seat upper to be raised and lowered relative to the seat base. Some of the adjustable seat systems further include a front seat axis, a rear seat axis, a front base axis, and a rear base axis, a front pivot mechanism that pivotally engages both the front seat axis and the front base axis, and a rear pivot mechanism that pivotally engages both the rear seat axis and the rear base axis.

Abstract: Disclosed adjustable seat systems that provide a self-contained height-adjustable seat system for sit-on-top kayaking that allows the seat to be adjusted into various height and angle positions, while maintaining independent adjustment to the fore/aft position of the seat in the kayak. Some of the adjustable seat systems include a seat upper that includes a seat bottom and a seat back; a seat base adapted to slidably engage a flat surface in the watercraft; and at least two pivot mechanisms coupling the seat upper to the seat base, wherein the at least two pivot mechanisms allow the seat upper to be raised and lowered relative to the seat base. Some of the adjustable seat systems further include a front seat axis, a rear seat axis, a front base axis, and a rear base axis, a front pivot mechanism that pivotally engages both the front seat axis and the front base axis, and a rear pivot mechanism that pivotally engages both the rear seat axis and the rear base axis.