Abstract: Certain aspects of the present disclosure are directed to a digital-to-analog converter (DAC) system. The DAC system generally includes a first current-steering DAC having a positive output, a negative output, and a bypass output; a common-mode (CM) path coupled between the positive and negative outputs; and a CM current compensation path coupled to the CM path.

Abstract: An example system for creating an active directory topology may determine whether an active directory site corresponding to a site name stored in a data input list exists and create, in response to a determination that the active directory site does not exist, the active directory site. The system may also determine whether a subnet corresponding to a subnet name stored in the data input list exists and create, in response to a determination that the subnet does not exist, the subnet.

Abstract: An internal combustion engine includes low and high pressure turbochargers connected in series. An engine cylinder has an intake valve that fluidly connects a main chamber of the engine cylinder with an outlet of the high pressure compressor through an intake passage. An exhaust gas recirculation passage is fluidly interconnected between exhaust and intake conduits. A pre-chamber encloses a spark plug and is fluidly open with the main chamber of the engine cylinder. A first fluid path extends from the intake passage directly to the pre-chamber, and a second fluid path extends from the intermediate passage directly to the pre-chamber.

Abstract: A system and method is provided that introduces oil droplets into the combustion chamber of a lean burn natural gas engine via dedicated channels located in the cylinder head and a valve seat insert for providing multiple distributed sources of ignition in addition to the spark plug based ignition system.

Abstract: A technology is described for configurable contact flows implemented using a contact flow service. An example method may include activating a contact flow in response to a request to establish a contact center session. The contact flow may be used to provide automated contact service communications to end users using computing resources hosted within a computing service provider environment. A starting prompt specified by the contact flow may be output using a communication channel. Input data may be received via the communication channel in response to the starting prompt. The input data may be analyzed to identify an intent identifier included in the input data and a contact flow action linked to the intent identifier may be executed.

Abstract: An interleaved digital-to-analog converter (DAC) system may include a first sub-DAC and a second sub-DAC and may be configured to provide both a converter output signal and a calibration output signal. The converter output signal may be provided by adding the first sub-DAC output signal and the second sub-DAC output signal. The calibration output signal may be provided by subtracting one of the first and second sub-DAC output signals from the other. The calibration output signal may be used as feedback to adjust the phase of one of the sub-DACs relative to the other, to promote phase matching their output signals.

Abstract: A system for controlling enriched prechamber stoichiometry includes a prechamber ignition device, and an ignition control system that includes a sensor structured to measure an amount of at least one of CO2 or O2 in a prechamber, an engine timing sensor, a fuel quality sensor, and an electronic control unit. The electronic control unit is structured to receive signals from each of the sensors and determine an air-fuel ratio of the prechamber for comparison with a target air-fuel ratio, and produce a fuel delivery signal based on the comparison.

Abstract: A technology is described for configurable contact flows implemented using a contact flow service. An example method may include activating a contact flow in response to a request to establish a contact center session. The contact flow may be used to provide automated contact service communications to end users using computing resources hosted within a computing service provider environment. A starting prompt specified by the contact flow may be output using a communication channel. Input data may be received via the communication channel in response to the starting prompt. The input data may be analyzed to identify an intent identifier included in the input data and a contact flow action linked to the intent identifier may be executed.

Abstract: Operating a gaseous fuel engine includes injecting a pilot charge directly into a combustion chamber in an engine, and igniting one spray plume of the pilot charge. A flame front is propagated to other pilot spray plumes to produce an ignition flame for igniting later injected main charge spray plumes. Injection of the pilot and main charges is by way of the same fuel injection orifices.

Abstract: A system for reforming a fuel may include a first sensor configured to measure an operating parameter of an engine. The operating parameter may correlate to a NOx emission level of the engine. The system may also include a controller in communication with the sensor and a reformer. The controller may be configured to determine a target NOx emission level for the engine. The controller may be also configured to determine a target value of the operating parameter corresponding to the target NOx emission level. The controller may be further configured to control the reformer to reform at least a portion of the fuel based on a difference between the measured value and the target value of the operating parameter.

Abstract: A system for controlling enriched prechamber stoichiometry includes a prechamber ignition device, and an ignition control system that includes a sensor structured to measure an amount of at least one of CO2 or O2 in a prechamber, an engine timing sensor, a fuel quality sensor, and an electronic control unit. The electronic control unit is structured to receive signals from each of the sensors and determine an air-fuel ratio of the prechamber for comparison with a target air-fuel ratio, and produce a fuel delivery signal based on the comparison.

Abstract: The present invention relates to quality assurance methods for use in amplification techniques, such as Next Generation Sequencing (NGS).

Abstract: Operating a gaseous fuel engine includes injecting a pilot charge directly into a combustion chamber in an engine, and igniting one spray plume of the pilot charge. A flame front is propagated to other pilot spray plumes to produce an ignition flame for igniting later injected main charge spray plumes. Injection of the pilot and main charges is by way of the same fuel injection orifices.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. The engine system may also have a first source configured to supply fuel for combustion in the engine. The engine system may have a second source configured to supply ignition promoter material for combustion in the engine. The engine system may also have a droplet generator configured to generate droplets of the ignition promoter material. In addition, the engine system may have a controller. The controller may be configured to determine an engine parameter. The controller may also be configured to determine a number of the droplets based on the engine parameter. Further, the controller may be configured to determine droplet sizes of the droplets based on the engine parameter. In addition, the controller may be configured to adjust the droplet generator to generate the number of the droplets having the droplet sizes.

Abstract: An ignition device and strategies are provided for extending spark plug life and air-fuel mixture lean limits in natural gas engines while maintaining or improving the engine thermal efficiency. The ignition device may include a plug body extending between a terminal end and an electrode end, a plurality of electrode pairs radially disposed on the electrode end each having an inner electrode and an outer electrode and an insulating body electrically isolating each of the electrode pairs from one another and each of the inner electrodes from the outer electrodes.

Abstract: The disclosure describes multipoint ignition systems for an engine and methods of operation of the same. The systems and methods can include an engine, including an engine block having at least one cylinder bore, a piston having a piston crown facing a flame deck surface such that a combustion main chamber is defined within a cylinder bore and located between the piston crown and the flame deck surface, the piston crown further including a piston bowl having a generally concave shape, and a combustion pre-chamber having a nozzle tip disposed in fluid communication with the combustion main chamber, the nozzle tip having at least one nozzle opening configured to inject a fuel jet into the combustion main chamber, wherein the piston includes a piston wall located around a circumference of the piston bowl, the piston wall including at least one cavity.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. The engine system may also have a first source configured to supply fuel for combustion in the engine and a second source configured to supply an ignition promoter material for combustion in the engine. The engine system may have a droplet injector configured to generate at least one droplet of the ignition promoter material, apply an amount of charge on the at least one droplet, and deliver the at least one droplet to the at least one cylinder. The engine system may also have a controller. The controller may be configured to determine an engine parameter, and to determine the amount of charge based on the engine parameter. In addition, the controller may be configured to adjust the droplet injector to apply the determined amount of charge to the at least one droplet.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. The engine system may also have a first source configured to supply fuel for combustion in the engine. The engine system may have a second source configured to supply ignition promoter material for combustion in the engine. The engine system may also have a droplet generator configured to generate droplets of the ignition promoter material. In addition the engine system may have a controller. The controller may be configured to determine an engine parameter. The controller may also be configured to determine a number of the droplets based on the engine parameter. Further, the controller may be configured to determine droplet sizes of the droplets based on the engine parameter. In addition, the controller may be configured to adjust the droplet generator to generate the number of the droplets having the droplet sizes.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. The engine system may also have a first source configured to supply fuel for combustion in the engine and a second source configured to supply an ignition promoter material for combustion in the engine. The engine system may have a droplet injector configured to generate at least one droplet of the ignition promoter material, apply an amount of charge on the at least one droplet, and deliver the at least one droplet to the at least one cylinder. The engine system may also have a controller. The controller may be configured to determine an engine parameter, and to determine the amount of charge based on the engine parameter. In addition, the controller may be configured to adjust the droplet injector to apply the determined amount of charge to the at least one droplet.

Abstract: A light imaging system for an acoustic imaging system uses polarized light to illuminate a birefringent detector through a partially transparent mirror, a lens through which light reflected from the detector passes and a light imager views the mirror through a linear polarizer with the position of the light imager being adjusted to image the full detector and to minimize effects due to the non-linear behavior of the detector.