Abstract: Techniques for imaging a subterranean formation include activating an acoustic energy source that is at least partially submerged in a volume of liquid on or under a terranean surface; based on the activating, producing acoustic wave energy that travels through the volume of liquid and to a subterranean zone below the terranean surface; receiving, at one or more acoustic receivers, reflected acoustic wave energy from the subterranean zone; and generating, with a control system, data associated with the subterranean zone based on the reflected acoustic wave energy.

Abstract: A system includes a mobile vehicle including a geolocator and an active acoustic source configured to generate acoustic wave energy directed toward a fiber optic network that includes one or more fiber optic cables and a distributed acoustic sensing (DAS) interrogator communicably coupled to the one or more fiber optic cables; and a control system. The control system is configured to perform operations including acquiring a signal from the DAS interrogator in response to the acoustic wave energy generated from the active acoustic energy source during movement of the mobile vehicle on or above the terranean surface; determining a geolocation of the mobile vehicle from the geolocator during or subsequent to acquisition of the signal from the DAS interrogator; and determining a location of the at least one fiber optic cable based on the determined geolocation of the mobile vehicle during acquisition of the signal from the DAS interrogator.

Abstract: This disclosure describes a system and method for effectively training a machine learning model to identify features in DAS and/or seismic imaging data with limited or no human labels. This is accomplished using a masked autoencoder (MAE) network that is trained in multiple stages. The first stage is a self-supervised learning (SSL) stage where the model is generically trained to predict data that has been removed (masked) from an original dataset. The second stage involves performing additional predictive training on a second dataset that is specific to a particular geographic region, or specific to a certain set of desired features. The model is fine-tuned using labeled data in order to develop feature extraction capabilities.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for generating realistic synthetic seismic data items. One of the methods includes obtaining a plurality of synthetic seismic data items; obtaining a plurality of real seismic data items; processing each of the plurality of synthetic seismic data items using a machine learning model; processing each of the plurality of real seismic data items using the same machine learning model; determining a range for values for one or more parameters of a synthetic seismic data generator by comparing the synthetic seismic data items and the real seismic data items in an embedding space of the machine learning model; and selecting, as realistic synthetic seismic data items, a plurality of synthetic seismic data items that have been generated with a respective combination of values for the one or more parameters that is within the determined range.

Abstract: Prestack images from the object store are hierarchically combined to generate a hierarchically stacked image. The hierarchically stacked image is generated by combining stacked images that includes a stacked image. The stacked image is generated by combining at least the prestack images. Based at least on the hierarchically stacked image, a quality measure of a prestack image is generated. Prior to deleting at least a subset of the prestack images from the object store and based at least on the quality measure, the prestack images are further combined to generate an enhanced stacked image. The stacked image is substituted using the enhanced stacked image. Subsequent to the substituting and prior to deleting at least the subset of the stacked images from the object store, the stacked images are combined to generate an enhanced hierarchically stacked image. The enhanced stacked image and the enhanced hierarchically stacked image are generated using failure recovery metadata.

Abstract: Prestack images from the object store are hierarchically combined to generate a hierarchically stacked image. The hierarchically stacked image library stored in an object store, a set of prestack image is generated by combining stacked images that includes a stacked image. The stacked image is generated by combining at least the prestack images. Based at least on the hierarchically stacked image, a quality measure of a prestack image is generated. Prior to deleting at least a subset of the prestack images from the object store and based at least on the quality measure, the prestack images are further combined to generate an enhanced stacked image. The stacked image is substituted using the enhanced stacked image. Subsequent to the substituting and prior to deleting at least the subset of the stacked images from the object store, the stacked images are combined to generate an enhanced hierarchically stacked image.

Abstract: The present disclosure relates to devices, systems and methods for improving patient adherence with respect to HFCC therapy. A therapy system of the present disclosure may include a percussive pulsing therapy device configured for delivering pulsating or intermittent airflow to a patient device, such as a patient vest worn by a patient. The airflow delivered to the patient vest may have an air pressure and a frequency, each of which may be adjustable in some embodiments. A therapy system of the present disclosure may additionally include a controller, a database, and one or more sensors. The controller and/or one or more sensors may record therapy data for a therapy session. Based on the recorded therapy data, the system may provide encouragement, advice, motivation, and/or options or information to a user by way of skills training, goal setting, feedback, reinforcement, environmental prompts, social support, and/or other patient interventions.

Abstract: A device and method coupled to a therapy garment to apply repetitive pressure pulses to a patient body, including a controller operable to regulate at least the duration of operation, frequency of the air pulses and selected air pressure applied to the patient. Aspects of the therapy system may be operable in accordance with operating parameters and a memory device captures session and summary data associated with one or more therapy sessions. The apparatus may comprise a wireless transmitter operable to wirelessly transmit session and summary data relative to one or more therapy sessions to a remote location.

Abstract: An apparatus for forming a lesion in tissue along a desired ablation path includes a guide member having a tissue-opposing surface for placement against a heart surface. A guide carriage is sized to be received within the guide member and moveable therein along a longitudinal axis. A flexible tubular member extends from a proximal end of said carriage and through a length of the guide member with the tubular member adapted to move the carriage within the guide member upon application of a force to the tubular member. A system urges the carriage to move in a path along an axis of the guide member by amount substantially identical to a displacement of a force application location on the flexible tubular member.

Abstract: An apparatus for forming a lesion in tissue along a desired ablation path includes a guide member having a tissue-opposing surface for placement against a heart surface. A guide carriage is sized to be received within the guide member and moveable along a longitudinal axis of the guide member. A tubular member extends from a proximal end of the carriage and out a proximal end of the guide member. An ablation element is carried in the carriage for movement. The ablation member is connected to a source of ablation energy through the tubular member. A sensor is provided for sensing a safety condition. The sensor is connected to a monitor external the guide member.

Abstract: An apparatus for forming a lesion in tissue along a desired ablation path includes a guide member having a tissue-opposing surface for placement against a heart surface. A guide carriage is sized to be received within the guide member and moveable therein along a longitudinal axis. The carriage is configured to receive an optical fiber extending substantially axially within the carriage and bend the fiber for a discharge tip of the fiber to aim through a bottom wall of the guide member. The carriage is further configured to bend the fiber toward said discharge tip with a curved portion subject to mechanical stress and a straight portion at the fiber discharge tip. The straight portion is selected to have a length to dissipate thermal stress arising from reflectance of light from the tissue back into the discharge tip.

Abstract: A method and apparatus for treating a body tissue in situ (e.g., an atrial tissue of a heart to treat) atrial fibrillation include a lesion formation tool is positioned against the heart surface. The lesion formation tool includes a guide member having a tissue-opposing surface for placement against a heart surface. An ablation member is coupled to the guide member to move in a longitudinal path relative to the guide member. The ablation member has an ablation element for directing ablation energy in an emitting direction away from the tissue-opposing surface. The guide member may be flexible to adjust a shape of the guide member for the longitudinal path to approximate the desired ablation path while maintaining the tissue-opposing surface against the heart surface. In one embodiment, the ablation member includes at least one radiation-emitting member disposed to travel in the longitudinal pathway.

Abstract: An iontophoresis electrode (10) is disclosed including a backing layer (22) formed of PVC or similar material including plasticizers providing softness and conformability and a conductive layer (18) formed of carbon or similar polymer material having electrical characteristics which are negatively affected with the migration of the plasticizers. A barrier layer (26) is provided to prevent the undesired migration of plasticizers from the backing layer (22) into the conductive layer (18). In one preferred form, the barrier layer (26) is a sacrificial layer, such as of identical construction as the conductive layer (18), for acceptance of the migration of the plasticizers. In another form, the barrier layer (26) is an impermeable layer formed of material in which the plasticizer is immiscible so as to prevent the migration of the plasticizers.