Abstract: The present disclosure is directed to a balun package comprising a set of inductive baluns for a magnetic resonance imaging (MRI) radio frequency (RF) coil. A first resonant circuit and a second resonant circuit each comprise an inductor. A first decoupling circuit leg is between and shared by the first and second resonant circuits and includes one or more decoupling inductors and/or one or more decoupling capacitors. A first cable bundle is wound to form the inductor of the first resonant circuit or is otherwise spaced from and inductively coupled to the inductor of the first resonant circuit.

Abstract: A method, an apparatus, and a system for testing a terminal. The method includes: receiving a smart card switching instruction; acquiring a card channel identifier from the smart card switching instruction; switching a connected-card channel to a target card channel corresponding to the card channel identifier when the target card channel corresponding to the card channel identifier is a contactless card channel; receiving a data request for a terminal test; acquiring, through a first relay repeater, response data in response to the data request, from a smart card to be tested within the target card channel; and sending, through a second relay repeater, the response data to the terminal whereby accomplishing the terminal test.

Abstract: In some embodiments, the present disclosure relates to a multi-turn (MT) birdcage magnetic resonance imaging (MRI) radio-frequency (RF) coil. The MT birdcage MRI RF coil includes a first conductive ring, a second conductive ring, and a plurality of conductive rungs. Each of the plurality of conductive rungs includes a first end coupled to the first conductive ring, and a second end coupled to the second conductive ring. At least one of the first conductive ring and the second conductive ring includes more than one turn. The first conductive ring, the second conductive ring, and the plurality of conductive rungs form a plurality of meshes.

Abstract: A magnetic resonance imaging (MRI) system can include a gapped degenerate birdcage magnetic resonance imaging (MRI) radio frequency (RF) coil. The gapped degenerate birdcage MRI RF coil is tuned to a degenerate mode and comprises a row of RF coil elements and a mechanical gap. The RF coil elements may also be referred to as channels or meshes. The row extends circumferentially around an axis of a cylindrical-like former, and mechanical gap separates a pair of directly neighboring RF coil elements in the row. A transformer, a partial overlap, or the like minimizes inductive coupling between the pair of directly neighboring RF coil elements.

Abstract: Disclosed here is a method for making a three-dimensional micro-architected aerogel, comprising: (a) curing a reaction mixture comprising a co-sol-gel material (e.g., graphene oxide (GO)) and at least one catalyst to obtain a crosslinked co-sol-gel (e.g., GO hydrogel); (b) providing a photoresin comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and a dispersion of the crosslinked co-sol-gel (e.g., GO hydrogel); (c) curing the photoresin using projection microstereolithography layer-by-layer to produce a wet gel having a pre-designed three-dimensional structure; (d) drying the wet gel to produce a dry gel; and (e) pyrolyzing the dry gel to produce a three-dimensional micro-architected aerogel (e.g., graphene aerogel). Also disclosed is a photoresin for projection microstereolithography, comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and a dispersion of a crosslinked co-sol-gel.

Abstract: A functionally graded material is formed by pipetting individual micro-or-nano-litter droplets with a variety of materials including multi-nanostructured material (nanowires, carbon nanotubes, enzymes, multi-element and/or multi-color, multi-biomolecules) and UV polymerization of the flat hydrogel meniscus surface formed at the carrier fluid interface. After step-by-step droplet pipetting and subsequent layer-by-layer UV polymerization via a digital mask, the complete fabricated part without supporting layers is taken out of the carrier fluid while the un-cured micro-litter residue is conveniently suctioned out of the carrier fluid.

Abstract: A functionally graded material is formed by pipetting individual micro-or-nano-litter droplets with a variety of materials including multi-nanostructured material (nanowires, carbon nanotubes, enzymes, multi-element and/or multi-color, multi-biomolecules) and UV polymerization of the flat hydrogel meniscus surface formed at the carrier fluid interface. After step-by-step droplet pipetting and subsequent layer-by-layer UV polymerization via a digital mask, the complete fabricated part without supporting layers is taken out of the carrier fluid while the un-cured micro-litter residue is conveniently suctioned out of the carrier fluid.

Abstract: Disclosed here is a method for making a three-dimensional micro-architected aerogel, comprising: (a) curing a reaction mixture comprising a co-sol-gel material (e.g., graphene oxide (GO)) and at least one catalyst to obtain a crosslinked co-sol-gel (e.g., GO hydrogel); (b) providing a photoresin comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and a dispersion of the crosslinked co-sol-gel (e.g., GO hydrogel); (c) curing the photoresin using projection microstereolithography layer-by-layer to produce a wet gel having a pre-designed three-dimensional structure; (d) drying the wet gel to produce a dry gel; and (e) pyrolyzing the dry gel to produce a three-dimensional micro-architected aerogel (e.g., graphene aerogel). Also disclosed is a photoresin for projection microstereolithography, comprising a solvent, a photoinitiator, a crosslinkable polymer precursor, and a dispersion of a crosslinked co-sol-gel.

Abstract: Described herein are aspects of a three-dimensional (3D) piezoelectric structure that can be composed of a 3D periodic microlattice that can be composed of a piezoelectric composite material, wherein the 3D periodic microlattice can include a plurality of interconnected 3D node units capable of generating a piezoelectric response upon application of a stress to the 3D periodic microlattice, and wherein the plurality of interconnected 3D node units can form a tailored piezoelectric tensor space. Also described herein are systems that can include one or more of the 3D piezoelectric structures described herein. Also described herein are methods of making and using the 3D piezoelectric structures described herein.

Abstract: Described herein are electroless material deposition methods and techniques that can be used to deposit one or more materials on a structure in a selective manner such that deposition can occur in predetermined areas. The methods and techniques of selective electroless material deposition methods described herein can be used to selectively deposit material(s) on 3D printed structures. In some aspects, the 3D structures can contain micro-features that can have one or more materials selectively deposited on their surface in one or more locations.

Abstract: Provided herein are 3D printing systems including, but not limited to, 3D printing systems that can, in some aspects, be configured to print multi-materials and/or 3D structures having micro-scale features. In some aspects, the 3D printing system can include a jethead, wherein the jethead can include a body portion, one or more printing material dispensers that are each coupled to one or more feedstock material reservoirs and the body portion, and at least one cleaning unit configured to clean a printed object, a printing platform, a component of an x axis cartridge, or any combination thereof. Also provided herein are scanning projection optical micro-sterolithography systems that can be configured to allow for printing micro-scale features in large scale 3D objects.

Abstract: Features related to a system and method for dynamic resource prediction simulation are described. The predictions consider historical data collected by the organization or user revisions to planning inputs to predict the amount of a resource needed for a certain task and the amount of the resource able to perform the tasks. The system and method displays the predictions in a visual representation including control elements allowing a user to simulate a variety of scenarios and situations to allow the organization to properly reallocate resources or acquire an appropriate amount of the resource.

Abstract: In one embodiment, a composition of matter includes: a plurality of ligaments each independently comprising one or more layers of graphene; where the plurality of ligaments are arranged according to a deterministic three-dimensional (3D) pattern. In another embodiment, a method of forming a deterministic three-dimensional (3D) architecture of graphene includes: forming or providing a substrate structurally characterized by a predefined 3D pattern; forming one or more layers of metal on surfaces of the substrate; and forming one or more layers of graphene on surfaces of the metal.

Abstract: Provided herein are 3D printing systems including, but not limited to, 3D printing systems that can, in some aspects, be configured to print multi-materials and/or 3D structures having micro-scale features. In some aspects, the 3D pinting system can include a jethead, wherein the jethead can include a body portion, one or more printing material dispensers that are each coupled to one or more feedstock material reservoirs and the body portion, and at least one cleaning unit configured to clean a printed object, a printing platform, a component of an x axis cartridge, or any combination thereof. Also provided herein are scanning projection optical micro-sterolithography systems that can be configured to allow for printing micro-scale features in large scale 3D objects.

Abstract: An additive manufacturing system utilizing an oxygen-permeable membrane to facilitate low-volume printing and high-speed resin change in a stereolithography-based 3D printer. The membrane is used to constrain the fluid surface at the focal plane of the stereolithography printer and a carrier fluid is used to hold the fluid against the membrane. The small amount of resin is quickly switched using integrated microfluidic channels.

Abstract: In one embodiment, a composition of matter includes: a plurality of ligaments each independently comprising one or more layers of graphene; where the plurality of ligaments are arranged according to a deterministic three-dimensional (3D) pattern. In another embodiment, a method of forming a deterministic three-dimensional (3D) architecture of graphene includes: forming or providing a substrate structurally characterized by a predefined 3D pattern; forming one or more layers of metal on surfaces of the substrate; and forming one or more layers of graphene on surfaces of the metal.

Abstract: A rare earth-based nanoparticle magnetic resonance contrast agent and a preparation method thereof are provided. The rare earth-based nanoparticle magnetic resonance contrast agent is rare earth-based inorganic nanoparticles having the surfaces coated with hydrophilic ligands. The rare earth-based nanoparticles are first obtained by a high-temperature oil phase reaction, and then the surfaces thereof are coated with hydrophilic molecules to obtain the rare earth-based nanoparticle magnetic resonance contrast agent. Compared with the existing clinical contrast agent, the magnetic resonance contrast agent of the present invention has a greatly improved relaxivity, a good imaging effect, a low required injection dose, and long in vivo residence time. In addition, the rigid structure of the inorganic nanoparticles can effectively reduce the leakage possibility of gadolinium ions.

Abstract: A functionally graded material is formed by pipetting individual micro-or-nano-litter droplets with a variety of materials including multi-nanostructured material (nanowires, carbon nanotubes, enzymes, multi-element and/or multi-color, multi-biomolecules) and UV polymerization of the flat hydrogel meniscus surface formed at the carrier fluid interface. After step-by-step droplet pipetting and subsequent layer-by-layer UV polymerization via a digital mask, the complete fabricated part without supporting layers is taken out of the carrier fluid while the un-cured micro-litter residue is conveniently suctioned out of the carrier fluid.

Abstract: An additive manufacturing system utilizing an oxygen-permeable membrane to facilitate low-volume printing and high-speed resin change in a stereolithography-based 3D printer. The membrane is used to constrain the fluid surface at the focal plane of the stereolithography printer and a carrier fluid is used to hold the fluid against the membrane. The small amount of resin is quickly switched using integrated microfluidic channels.

Abstract: Shelves in a collapsible shelving structure are foldable about respective fold lines extending widthwise of respective shelves to load-bearing states.