Abstract: Disclosed herein are systems and methods of using a coating solution such as an aromatic copolyester thermoset (ACT) to improve the wear, galling, and corrosion resistances of downhole tools and their sub-components. Aromatic copolyester thermoset may be reinforced with filler material. Further, the aromatic copolyester thermoset reinforced with filler material may be used in a borehole as a composite hollow profile, for example. In some examples, the systems may comprise a substrate for downhole applications coated with an aromatic thermosetting copolyester mixed with polytetrafluoroethylene (PTFE).

Abstract: A system includes a turbine having an exhaust flow path, an inner turbine wall radially disposed along the exhaust flow path, an outer turbine wall disposed along the exhaust flow path and radially outward from the inner turbine wall, and an outer flow control vane configured to selectively extend radially inward from the outer turbine wall. A radial extent of the outer flow control vane is less than a radial distance between the inner turbine wall and the outer turbine wall. The outer flow control vane is disposed downstream of a last stage vane of the turbine and upstream of a last stage blade of the turbine. The turbine also includes an actuation assembly configured to actuate the outer flow control vane to cause the outer flow control vane to extend radially inward. The system also includes a controller configured to instruct the actuation assembly to actuate the outer flow control vane.

Abstract: A method and apparatus for operating a token-based vehicular security system (TVSS) is disclosed. The method includes communicating with a communicatively connected vehicle (CV) communicatively connected to the token based vehicular security system (TVSS); issuing a pseudonym certificate (PC) to the communicatively connected vehicle (CV) from one of a plurality of roadside units (RSUs) with the token-based vehicular security system (TVSS) having a low latency; and providing a standard unforgeability security guarantee for the token based vehicular security system (TVSS) without violating anonymity or unlinkability properties. The system includes a roadside unit (RSU) communicatively connected to a roadside unit backend included in a cloud computing environment; a certificate authority (CA) included in the cloud computing environment; a SETUP protocol; a TOKENGEN protocol; a PSEUDOGEN; and a REVOKE protocol.

Abstract: Systems and methods are described using a trained ML model to monitor, detect failure within, and schedule a remediation procedure (RP) for an operating ESP within a well. ESP status data including a time series comprising ESP input variables representing ESP state are collected from a sensor. Using fuzzy logic, the ESP status data is cleaned to remove abnormal data and used to generate fuzzy logic-based labels, each representing an ESP condition associated with ESP state. The fuzzy logic-based labels are segregated into processed labels used to populate each ML model feature. A selected, trained ML model with improved accuracy for ESP monitoring, failure detection, and RP scheduling for the ESP (based on specific ML model, well, and ESP), accepts the ML model features as input. An ESP failure alert is generated by the ML model based on the ESP status data. The RP is scheduled before ESP catastrophic failure.

Abstract: HIC-resistant materials may include sensors embedded within or otherwise coupled thereto for use in a hydrogen service environment. In an example, a diagnostic system includes a first sensor embedded within a structural metal for exposure to hydrogen for generating a signal response to both the hydrogen and one or more parameter. A second sensor is embedded within the structural metal for generating another signal response to the one or more parameter. A hydrogen-suppressing layer is provided to suppress any response of the second sensor to the hydrogen. A controller in communication with the first and second sensors distinguishes the signal response of the first sensor from the signal response of the second sensor to characterize the hydrogen and the one or more other parameter.

Abstract: A system obtains a graph representing a set of resources of a distributed system. At least one node of the graph represents a resource-metric pair. The system further obtains time series data that indicates anomalies from the system. Then, the system determines a root cause anomaly that caused other anomalies based at least in part on the graph and the time series data.

Abstract: A method of rendering a service graph illustrating dependencies between a frontend and a backend of an application comprises generating a plurality of frontend traces from a plurality of frontend spans and generating a plurality of backend traces from a plurality of backend spans ingested from the application. The method also comprises aggregating frontend metrics data using the plurality of frontend traces and backend metrics data using the plurality of backend traces. The method further comprises determining connection information between one or more frontend traces of the plurality of frontend traces and corresponding backend traces of the plurality of backend traces. The method also comprises rendering the service graph using the connection information and the aggregated frontend and backend metrics data.

Abstract: A power module is provided with a substrate, power devices, and a housing. The power devices are mounted on device pads of the substrate and arranged to provide a power circuit having a first input, a second input, and at least one output. First and second power terminals provide first and second inputs for the power circuit. At least one output power terminal provides at least one output. The housing encompasses the substrate, the power devices, and portions of the first and second input power terminals as well as the at least one output power terminal. The first and second input power terminals extend out of a first side of the housing, and the at least one output power terminal extends out of a second side of the housing, the first side being opposite the second side.

Abstract: Various example embodiments relate to downlink power allocation in general massive MIMO systems. A method may comprise: constructing a graph representing a plurality of user equipments and a plurality of access points, wherein the graph comprises a plurality of nodes, wherein each node represents a communication link between one user equipment of the plurality of user equipments and one access point of the plurality of access points, and for at least one node of the graph, determining a power control parameter for the access point associated with said node using a graph neural network, and transmitting the determined power control to the access point associated with said node.

Abstract: A method comprises receiving a time series of data values for a time window of each operational parameter of a number of operational parameters of equipment; calculating a time derivative feature that comprises a change of the data values of a first operational parameter of the number of operational parameters over the time window; and classifying, using a machine learning model and based on the time derivative feature, an operational mode of the equipment into different failure categories.

Abstract: Some implementations described herein relate to a system for generating identifiers. The system receives, from a device, a request to generate a plurality of identifiers. The system determines, based on receiving the request and by performing a parameter locking operation, a compute region parameter associated and a timestamp parameter. The system generates, based on the compute region parameter and the timestamp parameter, a set of one or more identifiers of the plurality of identifiers. Respective portions of each identifier, of the set of one or more identifiers, may indicate the compute region parameter, a version parameter associated with the parameter locking operation, the timestamp parameter, a counter value parameter, and an action parameter. The system processes, using a scrambling technique, the set of one or more identifiers and provides the set of one or more identifiers to the device.

Abstract: A blade assembly for a gas turbine engine having an engine casing, with the blade assembly being configured to rotate about a rotational axis. The blade assembly having a blade, and at least one fin. The blade extending between a root and a tip, with the tip being spaced radially from the engine casing to define a space therebetween. The at least one fin extending radially with respect to the tip and into the space.

Abstract: A power module is provided with a substrate, power devices, and a housing. The power devices are mounted on device pads of the substrate and arranged to provide a power circuit having a first input, a second input, and at least one output. First and second power terminals provide first and second inputs for the power circuit. At least one output power terminal provides at least one output. The housing encompasses the substrate, the power devices, and portions of the first and second input power terminals as well as the at least one output power terminal.

Abstract: A variety of methods and apparatus are disclosed, including, in one embodiment, a downhole tool for use in a borehole, comprising: a mandrel; and a sealing element disposed about the mandrel, wherein the sealing element comprises bulk metallic glass (BMG).

Abstract: A system includes a turbine exhaust section. The turbine exhaust section includes an exhaust flow path. The turbine exhaust section also includes an inner exhaust wall radially disposed along the exhaust flow path and an outer exhaust wall disposed along the exhaust flow path and radially outward from the inner exhaust wall. The turbine exhaust section includes an inner flow control vane configured to selectively extend radially outward from the inner exhaust wall. An inner radial extent of the inner flow control vane is less than a radial distance between the inner exhaust wall and the outer exhaust wall. The inner flow control vane is disposed downstream of a last stage blade of a turbine and upstream of an exhaust diffuser strut of the turbine exhaust section.

Abstract: A variety of methods and apparatus are disclosed, including, in one embodiment, a downhole tool for use in a borehole, comprising: a mandrel; and a sealing element disposed about the mandrel, wherein the sealing element comprises bulk metallic glass (BMG).

Abstract: A variety of methods and apparatuses are disclosed, including, a downhole tool for a wellbore, the downhole tool having a spring comprising bulk metallic glass (BMG), and a method of positioning the downhole tool having the spring comprising BMG in the wellbore.

Abstract: The invention relates to a device and method for blocking air contributing to pneumothorax during a lung biopsy.

Abstract: A blade assembly for a gas turbine engine having an engine casing, with the blade assembly being configured to rotate about a rotational axis. The blade assembly having a blade, and at least one fin. The blade extending between a root and a tip, with the tip being spaced radially from the engine casing to define a space therebetween. The at least one fin extending radially with respect to the tip and into the space.

Abstract: A power module is provided with a substrate, power devices, and a housing. The power devices are mounted on device pads of the substrate and arranged to provide a power circuit having a first input, a second input, and at least one output. First and second power terminals provide first and second inputs for the power circuit. At least one output power terminal provides at least one output. The housing encompasses the substrate, the power devices, and portions of the first and second input power terminals as well as the at least one output power terminal. The first and second input power terminals extend out of a first side of the housing, and the at least one output power terminal extends out of a second side of the housing, the first side being opposite the second side.