Abstract: A replicated block storage service provides durable and high performance network-attached storage replicated in two or more zones of a single region, and remains available despite a single zone failure. A probe file is generated to determine a health state of a replicated disk. When a disk is degraded, a lease is created indicating which replica is trusted and providing visibility to backend jobs to facilitate reconciliation of data between the first replica and the second replica. Moreover, degraded file markers are generated for use by the backend jobs in quickly identifying the data to be copied.

Abstract: An implant system for the fusion of the occipitocervical joint is provided. The system involves a pair of plates including a right plate and a left plate. The right plate has a first right plate opening and a second right plate opening. The left plate has a first left plate opening and a second left plate opening. The system also includes at least four bone fixation fasteners. Two fasteners are engageable with the plates and capable of fixing with the occipital condyle. The other two fasteners are engageable with the plates and capable of fixing with the C1 lateral mass.

Abstract: The present invention involves a prosthetic device for supporting an atlantoaxial joint between a C1 vertebra and a C2 vertebra after an odontoidectomy procedure. The device includes a prosthetic dens replacement which is fixed to the C2 vertebra via at least two screws. It also includes a bracket to replace the anterior arch of the C1 vertebra. The bracket is affixed to lateral masses of the C1 vertebra via at least two screws. In addition, the bracket, when affixed to the C1 vertebra, is engageable with the dens replacement that is affixed to the C2 vertebra.

Abstract: A method of performing radiofrequency lesioning on a subject is provided. The method involves introducing an outer cannula and an inner cannula into the subject percutaneously, then guiding the outer cannula and inner cannula using neuronavigation, where the inner cannula is neuronavigation-compatible and the neuronavigation uses a navigated posterior clival line (nPCL) as an anatomic reference point. Then, removing the inner cannula from the outer cannula once the outer cannula and inner cannula are placed in a position for creating a lesion in the subject. Next, inserting an electrode into the outer cannula; and passing an electrical impulse through the electrode, causing a lesion in the subject.

Abstract: A method for synchronous replication of stream data includes receiving a stream of data blocks for storage at a first storage location associated with a first geographical region and at a second storage location associated with a second geographical region. The method also includes synchronously writing the stream of data blocks to the first storage location and to the second storage location. While synchronously writing the stream of data blocks, the method includes determining an unrecoverable failure at the second storage location. The method also includes determining a failure point in the writing of the stream of data blocks that demarcates data blocks that were successfully written and not successfully written to the second storage location. The method also includes synchronously writing, starting at the failure point, the stream of data blocks to the first storage location and to a third storage location associated with a third geographical region.

Abstract: A method for managing data processing includes receiving, from a user of a data query system, a data query for data stored in a data store in communication with the data query system. The method also includes receiving a staleness parameter indicating an upper time boundary for the data query. The upper time boundary limits a query response to data within the data store that is older than the upper time boundary. The method further includes determining whether the data stored within the data store satisfies the staleness parameter. When a portion of the data within the data store fails to satisfy the staleness parameter, the method includes generating the query response that excludes the portion of the data that fails to satisfy the staleness parameter.

Abstract: Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

Abstract: Systems, method, and computer readable medium are provided for a controller for a generator. The system includes a rectifier for converting a first AC signal generated by the generator to a first DC signal; a first DC-DC associated with energy storage and a first mode; a second DC-DC associated with an inverter and a second mode; a switch for alternately toggling between the first DC-DC and the second DC-DC, wherein the first mode prevents output to the electrical grid, and the second mode enables inversion of the second DC signal to a second AC signal via the inverter; and a processor that uses the indicator to operate the switch to operate the generator in the first mode when a connection to the grid does not conform with a parameter, and operate the generator in the second mode when the connection to the grid conforms with the parameter.

Abstract: A fluid turbine may include a vertically-orientable shaft having at least one opening extending transversely therethrough, a first blade portion configured for vertical orientation on first side of the shaft, a second blade portion configured for vertical orientation on a second opposite side of the shaft, at least one rod extending through the shaft opening and connectable at a first end to the first blade portion and at a second end to the second blade portion. A reinforcing sleeve may extend through the shaft opening and may be interposed between the rod and the shaft opening for reinforcing at least one of the shaft, the at least one shaft opening, or the rod against forces exerted by the first and second blade portions when fluid impacts the first and second blade portions.

Abstract: Systems, method, and computer readable medium are provided for producing a DC output, comprising: a turbine for generating a variable AC from a variable flow; a rectifier for converting the variable AC to a variable first DC; a first DC-DC associated with a storage component; a second DC-DC associated with an inverter; a dual mode circuit for alternately toggling between the first DC-DC and the second DC-DC; and a controller for: operating the circuit to store the first DC in the storage component when the first DC is below a target level, and release energy at the target level using the first DC-DC when the energy reaches the target level; operating the circuit to convert the variable DC to the target level using the second DC-DC when the variable DC is above the target level; and output a target level DC including the released energy or the second DC.

Abstract: This disclosure describes many innovations including but not limited to systems, methods, and non-transitory computer readable media for controlling an energy generator. A system for controlling an energy generator includes a detector for sensing an indicator of electrical energy generated by the generator; an energy storage component configured, in a first mode of operation, to store energy generated during operation at a sub-threshold level insufficient for real-time supply to an electrical energy sink; an energy converter configured, in a second mode of operation, to provide energy generated during operation above the threshold level for real-time supply of energy to the electrical energy sink; and a controllable switch, electrically associated with the detector, and configured to alternately toggle between the first mode of operation and the second mode of operation based on the indicator to thereby permit energy generated at the sub-threshold level to be collected and intermittently used.

Abstract: Systems, methods, and computer program products are disclosed for determining a power curve for a fluid turbine. Determining a power curve for a fluid turbine includes receiving an indication of a fluid speed condition; if a predetermined load compliant with an MPPT protocol for the fluid turbine operating under the fluid speed condition is available, obtaining the predetermined load; and applying the predetermined load to the fluid turbine, thereby adjusting a rotational velocity in accordance with the MPPT protocol and the fluid speed condition; if the predetermined load is unavailable, applying a plurality of candidate loads in an iterative manner in accordance with the MPPT protocol and the fluid speed condition; determining an MPPT-compliant load that generates greater power; applying the MPPT-compliant load to the fluid turbine; and storing the MPPT-compliant load in association with the fluid speed condition for subsequent application.

Abstract: A replicated block storage service provides durable and high performance network-attached storage replicated in two or more zones of a single region, and remains available despite a single zone failure. A probe file is generated to determine a health state of a replicated disk. When a disk is degraded, a lease is created indicating which replica is trusted and providing visibility to backend jobs to facilitate reconciliation of data between the first replica and the second replica. Moreover, degraded file markers are generated for use by the backend jobs in quickly identifying the data to be copied.

Abstract: Systems, methods, and computer program products are disclosed for controlling a voltage output of a turbine. Controlling a voltage output of a turbine includes a rectifier for converting an AC output of a turbine to a DC voltage; a sensor for measuring the DC voltage; a charge controller for receiving the DC voltage from the rectifier and produce a DC output, including: a first circuit meeting a first performance criterion for a first DC range, a second circuit meeting a second performance criterion for a second DC operating range, a switch channeling the DC voltage between the first and second circuits; and a processor for receiving the DC voltage measurement from the sensor, and use the switch to channel the DC voltage between the first and second circuits, thereby meeting the first and second performance criteria when the DC voltage is in the first and second DC ranges, respectively.

Abstract: Systems, methods, and non-transitory computer readable media including instructions for coordinated braking of a plurality of geographically-associated fluid turbines.

Abstract: An implant system for the fusion of the occipitocervical (O-C1) joint is provided. The system has a plate including a horizontal panel, a right vertical panel and a left vertical panel. The horizontal panel has at least two openings. The right vertical panel has at least two openings. The left vertical panel has at least two openings. The system also includes at least four bone fixation fasteners to fix the panels to the occipital condyle and C1 lateral mass using the openings in the panels.

Abstract: Systems, methods, and computer program products are disclosed for determining a power curve for a fluid turbine. Determining a power curve for a fluid turbine includes receiving an indication of a fluid speed condition; if a predetermined load compliant with an MPPT protocol for the fluid turbine operating under the fluid speed condition is available, obtaining the predetermined load; and applying the predetermined load to the fluid turbine, thereby adjusting a rotational velocity in accordance with the MPPT protocol and the fluid speed condition; if the predetermined load is unavailable, applying a plurality of candidate loads in an iterative manner in accordance with the MPPT protocol and the fluid speed condition; determining an MPPT-compliant load that generates greater power; applying the MPPT-compliant load to the fluid turbine; and storing the MPPT-compliant load in association with the fluid speed condition for subsequent application.

Abstract: A fluid turbine may include a vertically-orientable shaft having at least one opening extending transversely therethrough, a first blade portion configured for vertical orientation on first side of the shaft, a second blade portion configured for vertical orientation on a second opposite side of the shaft, at least one rod extending through the shaft opening and connectable at a first end to the first blade portion and at a second end to the second blade portion. A reinforcing sleeve may extend through the shaft opening and may be interposed between the rod and the shaft opening for reinforcing at least one of the shaft, the at least one shaft opening, or the rod against forces exerted by the first and second blade portions when fluid impacts the first and second blade portions.

Abstract: Systems, methods, and computer program products are disclosed for controlling a voltage output of a turbine. Controlling a voltage output of a turbine includes a rectifier for converting an AC output of a turbine to a DC voltage; a sensor for measuring the DC voltage; a charge controller for receiving the DC voltage from the rectifier and produce a DC output, including: a first circuit meeting a first performance criterion for a first DC range, a second circuit meeting a second performance criterion for a second DC operating range, a switch channeling the DC voltage between the first and second circuits; and a processor for receiving the DC voltage measurement from the sensor, and use the switch to channel the DC voltage between the first and second circuits, thereby meeting the first and second performance criteria when the DC voltage is in the first and second DC ranges, respectively.

Abstract: Systems, methods, and non-transitory computer readable media including instructions for coordinating MPPT operations for a cluster of geographically-associated fluid turbines are disclosed. Coordinating MPPT operations for a cluster of geographically-associated fluid turbines includes receiving data from the cluster of geographically-associated fluid turbines; determining changes to total power output of the cluster based on changes in loading states of individual fluid turbines in the cluster; selecting a combination of loading states for the individual fluid turbines in the cluster to coordinate total power output for the cluster; and transmitting the selected combination of loading states to at least some of the individual fluid turbines in the cluster in order to vary rotational speeds of the at least some of the individual fluid turbines in the cluster.