Abstract: A leak-detecting assembly can include an array of hydrophones. The array can be moved within a hydrocarbon well. A variation in the Doppler shift caused by a stationary acoustic source (such as a leak) while the array moves towards and away from that source can be determined based on information from the array of hydrophones. The assembly can be associated with a passive system that captures acoustic signals directly from the source or leak and estimates a location of the source or leak based on measurement of Doppler shift in each receiver.

Abstract: In one embodiment, a system includes at least one processor and logic integrated with and/or executable by the processor, the logic being configured to instantiate, using an interface definition language (IDL) on a first server, a remote procedure call (RPC) function to exchange information between the first server and a second server, generate at least one stub on the first server using the RPC, and generate at least one stub on the second server using the RPC, wherein the at least one stub generated on the second server does not perform any marshalling or un-marshaling of data when endianess of the two servers is the same. Other systems, methods, and computer program products for exchanging information between servers using RPCs are described in more embodiments.

Abstract: A display device for displaying images conveying depth information comprises a first display unit for representing first image information on a first screen. The first display unit comprises the first screen with a holographic optical element, HOE, provided thereon, and a first light source for providing light for illuminating the first screen. The display device further comprises a second display unit for representing second image information. The second display unit comprises a second light source for providing light with a plurality of predetermined discrete wavelengths for creating the second image information, and a second screen which is provided in parallel or oriented at an acute angle relative to the first screen in order to project the second image information onto the first screen and thereby generate a virtual image corresponding to the second image information behind the first screen.

Abstract: Tools, systems, and methods may be configured for or include detecting one or more underground acoustic sources and localizing them in depth and radial distance from a wellbore using an array of at least three acoustic sensors disposed in the wellbore in conjunction with array-signal-processing that accounts for movement of the acoustic sensors and spatial aliasing by using adaptive time dependent modelled steering vector weights.

Abstract: A variation of a method for collecting and processing bioelectrical signals includes: establishing bioelectrical contact between a user and one or more sensors of a biomonitoring neuroheadset; monitoring contact characteristics of the one or more sensors based on bioelectrical signals detected at the one or more sensors; and providing feedback to the user based on the contact characteristics. A variation of a system for collecting and processing bioelectrical signals includes a set of sensors (e.g., electrodes) and a processing subsystem configured process the set of bioelectrical signals.

Abstract: A LIDAR apparatus includes a laser source generating a beam of laser light and an imaging device generating an image signal of a pattern of points overlaid upon an image of one or more objects. A controller includes an object detection module receiving the image signal and determining if the object is a protected object, such as a person susceptible to vision impairment from exposure to laser light. A laser intensity module provides an intensity control signal to the laser source and causes the laser source to vary the intensity of the laser light directed toward each of the protected objects. A spatial light modulator may modulate the first beam to project the pattern of points.

Abstract: A LIDAR system includes a laser projecting a first beam of laser light upon a spatial light modulator, such as a liquid crystal on silicon (LCOS) device, to project a second beam having a pattern of points of relatively high intensity separated from one another by regions of relatively low intensity. A first camera having a first field of view and generates an image signal of the pattern of points of the second beam overlaid upon an image of one or more objects within the first field of view. A picture creation module generates the pattern of points and communicates it to the spatial light modulator. An image processing module detects the position and distance of the one or more objects using the image signal. The picture creation module may generate one of a plurality of different patterns to increase the spatial resolution of the LIDAR system.

Abstract: A heat sink for dissipating heat from a heat-generating apparatus includes one or more thermally conductive structures extending from, and in heat-conducting contact with, the heat-generating apparatus. The thermally conductive structures include sheets including carbon nanotubes, graphene, or boron nitride. The one or more thermally conductive structures are attached to the heat-generating apparatus in a configuration designed to dissipate heat from the heat-generating apparatus. Techniques for making a heat sink, and techniques of cooling a heat-generating apparatus are also described.

Abstract: The present invention provides improvement of the operation of a wave energy system by use of a method for predictive control (COM) of the converter machine that maximizes the energy generated by considering the energy conversion efficiency (MOD ENE) and a wave prediction (PRED). Furthermore, the method according to the invention determines the optimal control by minimizing an objective function weighted and discretized by the trapezoidal rule.

Abstract: The invention relates to compositions and methods for utilizing lysophosphatidylcholine scaffolds. The compositions and methods can be used for LPC-mediated delivery of fatty acids and other molecules; to screen and identify fatty acid formulations for parenteral nutrition; and for live animal organ imaging, among other uses. The invention also provides compositions and methods for utilizing mutations and polymorphisms in human Mfsd2a as markers for neurological deficits.

Abstract: The disclosed embodiments include leak detection systems and methods of downhole leak detection. In one embodiment, the method includes obtaining physical signals measured by at least one physical sensor traveling along a wellbore. The method also includes performing a frame decomposition operation on the physical signals of a first of the at least one the physical sensor to obtain a plurality of virtual signals associated with an array of virtual sensors, each virtual sensor of the array of virtual sensors being located at a virtual distance relative to the first physical sensor, the virtual distance corresponding to a physical distance. The method further includes synchronizing the virtual signals of the array of virtual sensors. The method further includes computing a spatial spectrum indicative of a location of a leak based on the synchronized virtual signals.

Abstract: A method for monitoring operation of an electric submersible pump. The method includes receiving data signals indicating values for a plurality of parameters regarding operation of the electric submersible pumping system; establishing, for at least some of the plurality of parameters, an associated reference signal; and detecting a deviation of one of the parameters from the reference signal associated with that parameter. As a result of the deviation having a rate of change below a predetermined threshold, the method includes updating the value of the reference signal to reflect the deviation. As a result of the deviation having a rate of change above the predetermined threshold, the method includes detecting an event and generating an indication of the event. The indication of the event further depends on a type of the parameter and a direction of the deviation from the reference signal.

Abstract: Aspects of the subject technology relate to a system configured to receive a set of network snapshot segments from an output stream of a stream processing service, compile the set of network snapshot segments from the set of messages into a first network snapshot and a second network snapshot, and compare the first network snapshot and the second network snapshot to identify a difference between the first network snapshot and the second network snapshot.

Abstract: Aspects of the disclosed technology relate to ways to authenticate customer/subscriber access to a policy update stream. A process of the technology can include steps for instantiating a network monitoring device in response to a request, the request comprising one or more configuration parameters for the network monitoring device, and receiving a first certificate from the network monitoring device, wherein the first certificate is based on the one or more configuration parameters. In some aspects, the steps can further include sending the first certificate to a processing pipeline for authentication, wherein the processing pipeline is configured to authenticate the first certificate based on a second certificate received by the processing pipeline from the network monitoring device. Systems and machine readable media are also provided.

Abstract: Aspects of the subject technology relate to a system configured to receive, from a stream processing service, a first network snapshot segment. The first network snapshot segment is associated with metadata that is used to determine that at least one additional network snapshot segment associated with the output stream has not been previously received. The system is configured to request, from the stream processing service, the at least one additional network snapshot segment and generate a first network snapshot by compiling the first network snapshot segment and the at least one additional network snapshot segment.

Abstract: A method including selecting a forward model based on a modeled well structure and including a single modeled acoustic source located in a modeled wellbore and a plurality of modeled acoustic sensors located in a modeled source area, simulating an acoustic signal generated by the single modeled acoustic source and received by each modeled acoustic sensor, calculating phases of the simulated acoustic signals received at each modeled acoustic sensor, obtaining with a principle of reciprocity a plurality of modeled acoustic sources in the modeled source area and a single modeled acoustic sensor in the modeled wellbore, calculating phase delays of the simulated acoustic signals between each modeled acoustic source and the single modeled acoustic sensor, detecting acoustic signals generated by a flow of fluid using acoustic sensors in a wellbore, and processing the acoustic signals using the phase delays to generate a flow likelihood map.

Abstract: A passive array of acoustic sensors capture acoustic signals produced by sand movement. The array tool is deployed downhole where it passively listens for acoustic energy generated by sand movement in the well. Once acoustic signals are acquired, model-based frameworks are used to extract single and multiple sensor features from the acoustic signals. The extracted features are used as signatures to detect or classify the production of sand.

Abstract: An aspect includes a computer system with a network encryption device and a trusted container within firmware or hardware and/or within a virtual machine running on the computer system. The network encryption device includes a key store for storing secret encryption keys and a network traffic encryption engine for negotiating and/or storing encryption keys in the key store and/or for encrypting and/or decrypting network traffic using the encryption keys from the key store. The trusted container includes a flow analyzer for analyzing network traffic received from the network encryption device.

Abstract: A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.

Abstract: A head-up display device for displaying a virtual image superimposed over a field of view to a viewer is provided. The head-up display device includes a picture generating unit having an illumination source, such as a laser, to generate a real image following a first light beam. A windshield of a vehicle engages the first light beam, either at an inclined angle or perpendicular, to reflect the first light beam away from the viewer as reflected images. A combiner disposed on the windshield including a holographic optical element steers the first light beam toward the viewer as a third light beam to present the virtual image within the field of view of the viewer. Mirrors may direct and magnify first light beam onto the combiner. A method for displaying a virtual image superimposed over a field of view to a viewer using a head-up display device is also provided.