Abstract: In some implementations, a controller may obtain a set of measurement values associated with the dual-pump single-power source system, wherein the set of measurement values includes at least one of one or more speed measurements associated with a clutch that is coupled to a power source and a first pump of the dual-pump single-power source system, a measurement value indicating an output speed of the power source, or a first crank angle associated with the first pump and a second crank angle associated with a second pump of the dual-pump single-power source system. The controller may detect that the clutch is experiencing slippage based on comparing at least two measurement values of the set of measurement values. The controller may perform an action to cause the clutch to disengage a mechanical connection between the first pump and the power source while the power source is running and is mechanically connected to the second pump.

Abstract: An optical device includes a stack that includes a first curved optical element stacked with a second curved optical element. The second curved optical element propagates light by total internal reflection. The stack also includes an incoupling diffractive grating that incouples the light into the second optical element and an outcoupling diffractive grating optically coupled to the incoupling diffractive grating through the second curved optical element. The outcoupling diffractive grating directs the light. The first curved optical element has a first refractive index, the second curved optical element has a second refractive index, and the first refractive index is different from the second refractive index by approximately 0.15 to 1.2.

Abstract: In some implementations, a controller may obtain an indication of a first crank angle associated with a first pump, of a dual-pump single-power source system, that is mechanically connected to a power source of the dual-pump single-power source system via a first clutch. The controller may obtain an indication of a second crank angle associated with a second pump, of the dual-pump single-power source system, that is mechanically connected to the power source via a second clutch. The controller may determine that a difference between the first crank angle and the second crank angle is outside of a tolerance of a crank angle difference value. The controller may modulate a fluid pressure associated with at least one of the first clutch or the second clutch to cause the difference between the first crank angle and the second crank angle to be within the tolerance of the crank angle difference value.

Abstract: Systems and methods are disclosed for producing multi-layer meltblown mats. The method includes depositing first meltblown fibers onto a first moving surface such as a conveyor belt to form a first layer of meltblown fibers, and depositing second meltblown fibers onto a second moving surface such as a conveyor belt to form a second layer of meltblown fibers. The first and second layers of meltblown fibers are fed through opposed rollers to form combined meltblown layers comprising the first layer of meltblown fibers and the second layer of meltblown fibers. The combined meltblown layers are bonded together to produce a bonded multi-layer meltblown sheet. The bonded multi-layer meltblown sheet has a first outer exposed surface formed by contact of the first layer of meltblown fibers with the first moving surface, and a second outer exposed surface formed by contact of the second layer of meltblown fibers with the second moving surface.

Abstract: A process of manipulating a closable carton with lid panels extending from walls of the carton and tabs received in slots formed in the lid panels to secure the lid panels to close the carton. The process has a step of moving a folding element transverse to each wall from which a lid extends to move the one or more lids into a position which closes the carton. The process has a step of lifting the closed carton past a non-return support and into engagement with another carton to provide a stack of closed cartons supported by the non-return support. The process has a step of the support then releasing a stack of closed cartons to a conveyor.

Abstract: An optical device includes a stack that includes a first curved optical element stacked with a second curved optical element. The second curved optical element propagates light by total internal reflection. The stack also includes an incoupling diffractive grating that incouples the light into the second optical element and an outcoupling diffractive grating optically coupled to the incoupling diffractive grating through the second curved optical element. The outcoupling diffractive grating directs the light. The first curved optical element has a first refractive index, the second curved optical element has a second refractive index, and the first refractive index is different from the second refractive index by approximately 0.15 to 1.2.

Abstract: Disclosed are examples of systems, apparatus, methods and computer program products for sharing and publishing files. In one aspect, the database system can maintain a user database, a file database and a library. The database system can receive a first request initiated by a first user to share a first file with one or more second users and, responsive to the first request, enable a second set of one or more permissions for each of the second users. The database system also can receive a second request initiated by the first user to publish the first file to the library and, responsive to the second request, publish the first file to the library. The database system additionally can restrict access to the published file based on permissions associated with the library.

Abstract: A switch assembly including a switch and an interface physically coupled to the switch and configured to be physically coupled to an electrical component, such as a transformer. The switch assembly also includes an interface having electrical hardware electrically coupled to the switch and configured to be electrically coupled to the component. The switch assembly further includes a surge arrester having an insulation member, a grounding jacket formed over a portion of the insulation member and a conductor extending through the insulation member and being electrically coupled to the hardware and the grounding jacket. The interface further includes a releasable connector that is electrically coupled to the conductor and allows the surge arrester to be disconnected from the interface.

Abstract: A controller that is associated with a pump system causes a power ramp rate of a motor of the pump system to have an initial power ramp rate. The controller monitors, after causing the power ramp rate of the motor to have the initial power ramp rate, a frequency of a power bus. One or more power sources provide power to the pump system via the power bus. The controller causes, based on monitoring the frequency of the power bus, the power ramp rate of the motor to be modified.

Abstract: Described examples include a method having steps of forming an isolation pad oxide layer on a substrate and forming and patterning a silicon nitride layer on the isolation pad oxide layer. The method also has steps of oxidizing portions of the substrate not covered by the silicon nitride layer to form a LOCOS layer and oxidizing the silicon nitride layer in an oxidizing ambient containing a chlorine source to form a silicon dioxide layer.

Abstract: In some implementations, a controller may monitor, during a ramp up period of a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD), an intake pressure of the fluid pump and a discharge pressure of the fluid pump. The controller may detect, based on monitoring the intake pressure and the discharge pressure, whether the intake pressure satisfies an intake pressure threshold or the discharge pressure satisfies a discharge pressure threshold. The controller may cause, via the VFD, reduction of a torque of the motor based on the intake pressure satisfying the intake pressure threshold or the discharge pressure satisfying the discharge pressure threshold.

Abstract: In some implementations, a controller may obtain a setting for a maximum discharge pressure associated with a fluid pump that is to be allowed during a hydraulic fracturing operation. The fluid pump may be driven by a motor that is controlled by a variable frequency drive (VFD). The controller may determine a maximum torque for the motor that achieves the maximum discharge pressure. The controller may cause, via the VFD, adjustment to a speed of the motor to maintain a torque of the motor at or below the maximum torque for the motor.

Abstract: In some implementations, a controller may obtain a setting for a target discharge pressure associated with a fluid pump driven by a motor that is controlled by a variable frequency drive (VFD). The target discharge pressure may be for use in a pressure test of a system that includes the fluid pump. The controller may determine a target torque for the motor that achieves the target discharge pressure. The controller may cause, via the VFD and in connection with the pressure test, adjustment to a speed of the motor to achieve the target torque for the motor.

Abstract: Apparatus and methods for detecting onset of cardiac arrest utilizing a perfusion monitor. Detecting cardiac arrest comprises transmitting a signal toward a user to interact with the skin of the user, receiving a reflection of the signal, generating a photoplethysmogram, and processing the photoplethysmogram to detect whether the user is experiencing cardiac arrest.

Abstract: In some implementations, a controller may monitor an available power supply of at least one power source for a system for hydraulic fracturing, and a current power demand of the system. The controller may determine, based on monitoring the available power supply and the current power demand, whether a relationship between the current power demand and the available power supply is indicative of an impending power failure. The controller may cause, based on determining that the relationship between the current power demand and the available power supply indicates the impending power failure, reduction of flow rates of one or more fluid pumps of the system to reduce the current power demand.

Abstract: Display devices are disclosed including tiled components. The tiled components can include any one or more of tiled light board assemblies, tiled diffusers, and tiles patterned light guides. In some embodiments, entire backlight units may be tiled.

Abstract: Disclosed are examples of systems, apparatus, methods and computer program products for sharing and publishing files. In one aspect, the database system can maintain a user database, a file database and a library. The database system can receive a first request initiated by a first user to share a first file with one or more second users and, responsive to the first request, enable a second set of one or more permissions for each of the second users. The database system also can receive a second request initiated by the first user to publish the first file to the library and, responsive to the second request, publish the first file to the library. The database system additionally can restrict access to the published file based on permissions associated with the library.

Abstract: A process of manipulating a closable carton with lid panels extending from walls of the carton and tabs received in slots formed in the lid panels to secure the lid panels to close the carton. The process has a step of moving a folding element transverse to each wall from which a lid extends to move the one or more lids into a position which closes the carton. The process has a step of lifting the closed carton past a non-return support and into engagement with another carton to provide a stack of closed cartons supported by the non-return support. The process has a step of the support then releasing a stack of closed cartons to a conveyor.

Abstract: Exemplary embodiments provided herein include an intelligent secure networked health messaging system configured by at least one processor to execute instructions stored in memory, the system comprising, a data retention system and a health analytics system, the health analytics system performing asynchronous processing with a patient's computing device and the health analytics system communicatively coupled to a deep neural network, a web services layer providing access to the data retention and the health analytics system, a batching service, wherein an application server layer transmits a request to the web services layer for data, the request processed by the batching service transparently to the patient, the request processed by the batching service transparently to the patient such that the patient can continue to use a patient facing application without disruption, the patient-facing application having an audio sensor and a computer video sensor, the application server layer including a high speed data