Abstract: Method and system for electrochemically compressing hydrogen. In one embodiment, the system includes a membrane electrode assembly (MEA) that includes a polymer electrolyte membrane (PEM), an anode, and a cathode. First and second gas diffusion media are positioned adjacent the cathode and anode, respectively. A humidifying membrane is positioned next to the second gas diffusion medium on a side opposite the anode. A water supply is connected to the humidifying membrane, and a hydrogen gas supply is connected to the second gas diffusion medium. A hydrogen gas collector including a back pressure regulator is connected to the first gas diffusion medium. Separators, positioned on opposite sides of the MEA, are connected to a power source. In use, hydrogen is electrochemically pumped across the MEA and collected in the hydrogen gas collector. The PEM is kept properly humidified by the humidifying membrane, which releases water into the second gas diffusion medium.

Abstract: A method of using a catheter assembly for inserting in a fluid filled space in a body includes providing a main body having a first end portion and a second end portion. The first end portion is positioned within the fluid filled space. The second end portion is adjusted to extend outwardly from the fluid filled space when the first end portion is positioned within the fluid filled space. A catheter tip is connected to the second end portion of the main body. The catheter tip includes a housing having a cavity defined therein and a rotating element positioned within the fluid filled space. The rotating element is rotated within the cavity of the housing to impart movement of the first end portion of the main body within the fluid filled space.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for object detection. In one aspect, a method comprises: obtaining: (i) an image, and (ii) a set of one or more query embeddings, wherein each query embedding represents a respective category of object; processing the image and the set of query embeddings using an object detection neural network to generate object detection data for the image, comprising: processing the image using an image encoding subnetwork of the object detection neural network to generate a set of object embeddings; processing each object embedding using a localization subnetwork to generate localization data defining a corresponding region of the image; and processing: (i) the set of object embeddings, and (ii) the set of query embeddings, using a classification subnetwork to generate, for each object embedding, a respective classification score distribution over the set of query embeddings.

Abstract: An isolation and filtration object including a volume of material having a first geometry wherein permeability is relatively lower, the geometry being that of a plug landable on a landing feature and a second geometry where permeability is relatively higher, the second geometry being larger than the first geometry and occupy a flow path in a borehole in which the plug is deployed. An isolation and filtration system including a housing, a plug seat in the housing, and an isolation and filtration object disposable on the plug seat. A borehole system including a borehole in a subsurface formation, a string in the borehole, and an isolation and filtration system connected to the string. A method for operating a borehole including migrating a plug to a seat in a housing, landing the plug in the seat, differentiating pressure across the plug, and transitioning the plug to the second geometry.

Abstract: A robotic surgical tool includes a handle providing a plurality of drive inputs, an elongate shaft including a plurality of sliding rack gears movably nested within a corresponding plurality of longitudinal channels defined along the shaft, and an end effector arranged at a distal end of the shaft and an articulable wrist interposing the end effector and the distal end. An actuation system housed in the handle actuates the drive inputs to move the sliding rack gears and thereby causes operation of at least one of the end effector and the wrist. A tailpiece is arranged at a proximal end of the shaft and is operably coupled to the sliding rack gears, the tailpiece includes a housing and a manual actuation device mounted to the housing and manually actuatable to act on the sliding rack gears and thereby operate at least one of the end effector and the wrist.

Abstract: A structure for emitting light is provided. The structure comprises an emissive layer (EML) positioned between electrodes. The EML is tuned such that emission of a transverse electric (TE) waveguide mode from the EML is promoted. The structure further comprises an optical component for diffracting the TE waveguide mode to emit light from the structure.

Abstract: A shape memory material element configuration including a shape memory material element, and a capillary line extending to the element and positioned to apply an activation fluid to the element.

Abstract: A tripping object including an object including a shape memory material and being stable in a second shape complementary to a landing feature and a first shape non-complementary to the seat, the object being transitioned from the second shape to the first shape upon being triggered. A method for operating a well including dropping a tripping object including a shape memory material on a landing feature in the well, and triggering the object to transition from a second shape to a first shape.

Abstract: An exemplary transparent tandem organic solar cell comprises a transparent substrate; a first transparent electrode disposed on a surface of the transparent substrate; and a series of interconnecting organic active layers disposed on a surface of the first transparent electrode. The series of organic interconnecting active layers comprise at least a front sub-cell that blocks ultraviolet wavelengths from passing through the front sub-cell; and a back sub-cell that blocks infrared wavelengths from passing through the back sub-cell. The solar cell further comprises a distributed Bragg reflector disposed on a surface of the back sub-cell, wherein the distributed Bragg reflector reflects unblocked infrared photons at an interface between the back sub-cell and the distributed Bragg reflector.

Abstract: A method of fabricating an all-solution-processed interconnection layer of a multi-junction tandem organic solar cell includes forming a coating of an aqueous poly(3,4-ethylenedioxythiophene) polystyrene sulfonate dispersion liquid on a sub-cell surface of a multi-junction tandem organic solar cell.

Abstract: Adsorptive media for chromatography, particularly ion-exchange chromatography, derived from a shaped fiber. In certain embodiments, the functionalized shaped fiber presents a fibrillated or ridged structure which greatly increases the surface area of the fibers when compared to ordinary fibers. Also disclosed herein is a method to add surface pendant functional groups that provides cation-exchange or anion-exchange functionality to the high surface area fibers. This pendant functionality is useful for the ion-exchange chromatographic purification of biomolecules, such as monoclonal antibodies (mAbs).

Abstract: An apparatus includes a housing configured to be disposed in a borehole in a resource bearing formation, the housing including an axially extending fluid conduit configured to receive borehole fluid, and a seating assembly including a convertible component that is configured to be actuated to move the convertible component in a radial direction between an open position and a seating position. The convertible component extends radially into the fluid conduit and forms a landing seat for an object when in the seating position, and the convertible component allows passage of the object therethrough when in the open position.

Abstract: A frac sleeve assembly and method of operation. The frac sleeve assembly includes a ball seat that retains a frac ball. The ball seat moves within a sleeve. The sleeve includes a profile that separates the first half and the second half to allow passage of the frac ball through the ball seat when the ball seat moves within the sleeve. Alternatively, the ball seat has a ring for receiving the frac ball and the sleeve has a protrusion that selectively engages a shifting pin to move the ring with respect to a ridge to release the ball from the ball seat when the ball seat moves within the sleeve.

Abstract: A frac sleeve assembly for use in a downhole operation and method of use are disclosed. The frac sleeve assembly includes a sleeve movable within a housing and a ball seat movable within the sleeve. The sleeve includes a pin adjusting element. The ball seat includes a seat tooth disposed at a fluid passage of the ball seat for seating a ball, and a pin associated with the seat tooth. Motion of the ball seat within the sleeve causes the pin adjusting element to move the pin to adjust the seat tooth to release the ball.

Abstract: A substance deposition and backflow preventing arrangement including a housing having a port therein, a sleeve disposed within the housing and positionable to cover or uncover the port, the sleeve having a first seal at one end thereof presenting a first hydraulic dimension and a second seal at another end of the sleeve having a different hydraulic dimension, a biasing member operably connected to the sleeve and to the housing and configured to urge the sleeve to a position covering the port.

Abstract: An object removal enhancement arrangement including a seat, a volume movable with the seat, the volume being protected in a first condition of the seat and unprotected in a second condition of the seat, and a material disposed within or as a part of the volume, the material degradative of an object.

Abstract: A frac sleeve assembly and method of operation. The frac sleeve assembly includes a ball seat that retains a frac ball. The ball seat moves within a sleeve. The sleeve includes a profile that separates the first half and the second half to allow passage of the frac ball through the ball seat when the ball seat moves within the sleeve. Alternatively, the ball seat has a ring for receiving the frac ball and the sleeve has a protrusion that selectively engages a shifting pin to move the ring with respect to a ridge to release the ball from the ball seat when the ball seat moves within the sleeve.

Abstract: A degradable object including a shell comprising a degradable material, a substance disposed at least partially within the shell, the substance having a coefficient of thermal expansion greater than a coefficient of thermal expansion of the shell.

Abstract: An object removal enhancement arrangement including a second object comprising a material configured to enhance degradation of a first object. A resource recovery system including a tubular string disposed in a formation, a first seat disposed in the tubular string, a second seat disposed in the tubular string, an object receivable in the second seat upstream of the first seat, the object comprising a material to enhance degradation of an object receivable in the first seat. A method for enhancing response time for degrading degradable objects in a system including landing a first object on a first seat, pressuring against the first object, landing a second object on a second seat uphole of the first object, releasing a material of the second object to an environment between the first seat and the second seat.

Abstract: A frac sleeve assembly and method of operation. The frac sleeve assembly includes a ball seat that retains a frac ball. The ball seat moves within a sleeve. The sleeve includes a profile that separates the first half and the second half to allow passage of the frac ball through the ball seat when the ball seat moves within the sleeve. Alternatively, the ball seat has a ring for receiving the frac ball and the sleeve has a protrusion that selectively engages a shifting pin to move the ring with respect to a ridge to release the ball from the ball seat when the ball seat moves within the sleeve.