Abstract: A method for manufacturing a fuel spray nozzle for a gas turbine engine includes forming a first section of the fuel spray nozzle by additive layer manufacturing. The first section includes a main chamber and internal passageways. The method includes forming a second section of the fuel spray nozzle by additive layer manufacturing on the first section. The second section includes a metering feature disposed in fluid communication with one of the internal passageways of the first section. The method includes modifying the metering feature of the second section by a first subtractive manufacturing process to obtain a desired diameter of the metering feature and/or a desired surface roughness of the metering feature. The method includes forming a third section of the fuel spray nozzle by additive layer manufacturing on the second section. The third section includes a deflector and a spin chamber.

Abstract: A method of friction welding a first workpiece to a second workpiece, includes the first workpiece with a first faying surface having a first faying length, the second workpiece with a second faying surface having a second faying length, the second faying length greater than the first faying length; positioning the first workpiece adjacent the second workpiece; reciprocating the first workpiece and the second workpiece against one another, the first faying moves relative to the second faying by a sweep length, a temperature at the first and second faying surfaces increases to create a weld interface; each of the first and second workpieces are consumed into the weld interface, adjusting the sweep length the sweep length remains equal to a difference between the second and the first faying lengths; and stopping the reciprocating and allowing the first and second workpieces to cool to weld the first and second workpieces together.

Abstract: A method of friction welding a first workpiece to a second workpiece, includes the first workpiece with a first faying surface having a first faying length, the second workpiece with a second faying surface having a second faying length, the second faying length greater than the first faying length; positioning the first workpiece adjacent the second workpiece; reciprocating the first workpiece and the second workpiece against one another, the first faying moves relative to the second faying by a sweep length, a temperature at the first and second faying surfaces increases to create a weld interface; each of the first and second workpieces are consumed into the weld interface, adjusting the sweep length the sweep length remains equal to a difference between the second and the first faying lengths; and stopping the reciprocating and allowing the first and second workpieces to cool to weld the first and second workpieces together.

Abstract: A workpiece for use with a friction welding process comprises a weld surface. The weld surface comprises a central ridge surface extending along the weld surface, with the central ridge surface being flanked on either side respectively by a first pyramidal surface and a second pyramidal surface. The first pyramidal surface subtends a first pyramidal angle with the central ridge surface, and the second pyramidal surface subtends a second pyramidal angle with the central ridge surface. The first pyramidal surface is further flanked by a third pyramidal surface, and the second pyramidal surface is further flanked by a fourth pyramidal surface, with the third pyramidal surface subtending a third pyramidal angle with the central ridge surface, and the fourth pyramidal surface subtending a fourth pyramidal angle with the central ridge surface. Each of the third pyramidal angle and the fourth pyramidal angle is less than 90°.

Abstract: Systems for assaying human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) are provided. Aspects of the systems include a traction force microscopy substrate, such as a traction force microscopy hydrogel (TFM-hydrogel), having an adhesion protein domain on a surface thereof; a video imager configured to obtain video data from an hiPSC-CM present on the adhesion protein domain; and a processing module configured to receive the video data and derive a parameter of the hiPSC-CM therefrom. Also provided are methods of using the systems.

Abstract: A workpiece for use with a friction welding process comprises a weld surface. The weld surface comprises a central ridge surface extending along the weld surface, with the central ridge surface being flanked on either side respectively by a first pyramidal surface and a second pyramidal surface. The first pyramidal surface subtends a first pyramidal angle with the central ridge surface, and the second pyramidal surface subtends a second pyramidal angle with the central ridge surface. The first pyramidal surface is further flanked by a third pyramidal surface, and the second pyramidal surface is further flanked by a fourth pyramidal surface, with the third pyramidal surface subtending a third pyramidal angle with the central ridge surface, and the fourth pyramidal surface subtending a fourth pyramidal angle with the central ridge surface. Each of the third pyramidal angle and the fourth pyramidal angle is less than 90°.

Abstract: A method and system to confirm co-location of multiple devices within a geographic area, while filtering spurious alarms, is provided. An example method comprises processing first GPS data obtained from a first GPS sensor and second GPS data obtained from a second GPS sensor. A sensing data evaluator compares a sensing error from the first GPS data and a sensing error from the second GPS data. Based on the result of the comparing, the sensing data evaluator determines whether the sensing errors are to be ignored. An approach where an alarm that otherwise would be generated is disabled or canceled may be termed as filtering spurious alarms.

Abstract: A method and system to confirm co-location of multiple devices within a geographic area, while filtering spurious alarms, is provided. An example method comprises processing first GPS data obtained from a first GPS sensor and second GPS data obtained from a second GPS sensor. A sensing data evaluator compares a sensing error from the first GPS data and a sensing error from the second GPS data. Based on the result of the comparing, the sensing data evaluator determines whether the sensing errors are to be ignored. An approach where an alarm that otherwise would be generated is disabled or canceled may be termed as filtering spurious alarms.

Abstract: An NFC-enabled device configured at least in part as an integrated circuit, the integrated circuit including a controller and a plurality of capacitors. The controller is operable to control one or more of the plurality of capacitors to vary an operating parameter of the NFC-enabled device.

Abstract: A near field RF communicator has an inductive coupler to enable inductive coupling with a magnetic field of an RF signal; a rectifier to rectify an AC voltage derived from an RF signal inductively coupled to the inductive coupler; and a regulator to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler, the regulator having a voltage-controlled impedance and a regulator controller to provide a control voltage for the voltage controlled impedance and to vary the control voltage in dependence upon a current flowing through the voltage controlled impedance. To prevent the voltage regulator from drawing excess current and energy from an RF field in which the communicator is present the voltage regulator is controlled to provide a chosen impedance characteristic.

Abstract: A NFC enabled device to couple inductively to the H field of an RF signal and a regulator to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler. The regulator has at least one voltage controlled impedance having a switch on voltage. A regulator controller provides a control voltage to each voltage controlled impedance such as that the control voltage is not less than the switch on voltage of the voltage controlled impedance.

Abstract: An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC, communicator is subjected by a received RF H field.

Abstract: A method and system to confirm co-location of multiple devices within a geographic area, while filtering spurious alarms, is provided. An example method comprises processing first GPS data obtained from a first GPS sensor and second GPS data obtained from a second GPS sensor. A sensing data evaluator compares a sensing error from the first GPS data and a sensing error from the second GPS data. Based on the result of the comparing, the sensing data evaluator determines whether the sensing errors are to be ignored. An approach where an alarm that otherwise would be generated is disabled or canceled may be termed as filtering spurious alarms.

Abstract: A near field RF communicator has an inductive coupler to enable inductive coupling with a magnetic field of an RF signal; a rectifier to rectify an AC voltage derived from an RF signal inductively coupled to the inductive coupler; and a regulator to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler, the regulator having a voltage-controlled impedance and a regulator controller to provide a control voltage for the voltage controlled impedance and to vary the control voltage in dependence upon a current flowing through the voltage controlled impedance. To prevent the voltage regulator from drawing excess current and energy from an RF field in which the communicator is present the voltage regulator is controlled to provide a chosen impedance characteristic.

Abstract: An apparatus and method is disclosed, to control NFC tag power dissipation. A first NFC device antenna harvests power for operation from a signal from another NFC device as a result of ambient magnetic fields present in the environment. The NFC device is configured with a regulator system in order to control the level of harvested power to prevent damage to the NFC device circuitry. The harvested power levels can exceed the ability of the regulator device to dissipate the additional power resulting in regulator damage or a reduction in the regulator lifetime. The power dissipation of the regulator can be monitored thermally, and the power dissipation controlled by reducing the regulation voltage accordingly. Various systems are presented to establish a cutoff threshold to the regulator power dissipation using thermal regulator feedback and/or antenna current monitoring.

Abstract: A near field RF communicator has an inductive coupler (223) to enable inductive coupling with a magnetic field of an RF signal; a rectifier (213,214,215,216) to rectify an AC voltage derived from an RF signal inductively coupled to the inductive coupler (223); and a regulator (209,210,211,220,221,900) to regulate a voltage derived from an RF signal inductively coupled to the inductive coupler, the regulator having a voltage-controlled impedance (210, 211) and a regulator controller (209) to provide a control voltage for the voltage controlled impedance and to vary the control voltage in dependence upon a current flowing through the voltage controlled impedance (210, 211). To prevent the voltage regulator from drawing excess current and energy from an RF field in which the communicator is present the voltage regulator is controlled to provide a chosen impedance characteristic.

Abstract: An NFC-enabled device configured at least in part as an integrated circuit, the integrated circuit including a controller and a plurality of capacitors. The controller is operable to control one or more of the plurality of capacitors to vary an operating parameter of the NFC-enabled device.

Abstract: An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC, communicator is subjected by a received RF H field.

Abstract: An NFC-enabled device configured at least in part as an integrated circuit, the integrated circuit including a controller and a plurality of capacitors. The controller is operable to control one or more of the plurality of capacitors to vary an operating parameter of the NFC-enabled device.

Abstract: An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field.