Abstract: A method of making a multi-axial integral geogrid suitable for stabilizing aggregate includes providing a polymer sheet, providing a patterned plurality of holes or depressions in the polymer sheet, and biaxially orienting the polymer sheet having the patterned plurality of holes or depressions therein to provide a plurality of interconnected oriented strands and partially oriented junctions forming a repeating pattern of outer hexagons having an array of openings. Oriented ribs extending inwardly from each of the outer hexagons support and surround a smaller inner hexagon having oriented strands, thus forming a plurality of trapezoidal openings and a single hexagonal opening. The oriented strands and partially oriented junctions of the outer hexagons form a plurality of linear strong axis strands extending continuously throughout the geogrid and forming triangular openings.

Abstract: A hydrodissector for hydrodissecting a vascular target, the hydrodissector comprising: a handle; a shaft extending from the handle at an angle and including a tip at a distal end thereof; at least one port provided at the tip and configured to be coupled to a fluid supply and to eject fluid from the at least one port into the space between the vascular target and surrounding tissues to dissect the vascular target from the surrounding tissues, the at least one port being sized to provide sufficient pressure and velocity to dissect the vascular target from the surrounding tissues, wherein the length of the shaft is configured for insertion into an incision to atraumatically hydrodissect the vascular target from the surrounding tissues, and wherein the shaft is configured to releasably couple with one or more hook-shaped attachments configured to lift the vascular target after the vascular target is dissected from the surrounding tissues.

Abstract: Methods, apparatus and computer program product for improving data indexing in a group-based communication platform are described herein. The group-based communication platform having a computed collection and one or more live collections. The computer-implemented method includes generating a new collection, the new collection being generated at a snapshot time point; associating a collection manager with the new collection; retrieving a plurality of electronic messages from the computed collection and the one or more live collections; writing the plurality of electronic messages to the new collection, the writing being completed at a cut-over time point; synchronizing the new collection with the one or more live collections based on the plurality of electronic messages; and redirecting the read alias and the write alias from the computed collection to the new collection.

Abstract: Aspects of a geogrid system for improving substrate interactions within a geotechnical environment is disclosed. In one aspect a geotechnical environment is configured with a horizontal multilayer mechanically stabilizing geogrid. In said aspect the geogrid is extruded with a polymeric material and a compressible cellular layer. In said aspect, the horizontal multilayer mechanically stabilizing geogrid is comprised of either a cap or a core of polymeric material or is further comprised of at least one compressible cellular layer configured to the polymeric material. Further, the horizontal multilayer mechanically stabilizing geogrid is configured with a triangle or triaxial geometry with patterned discontinuities and a plurality of strong axes.

Abstract: A monolayer multi-axial integral geogrid suitable for stabilizing aggregate includes a plurality of interconnected oriented strands and partially oriented junctions forming a repeating pattern of outer hexagons having an array of openings therein. Oriented ribs extending inwardly from each of said outer hexagons support and surround a smaller inner hexagon having oriented strands thus forming a plurality of trapezoidal openings and a single hexagonal opening. The oriented strands and partially oriented junctions of the outer hexagons form a plurality of linear strong axis strands that extend continuously throughout the entirety of the geogrid and form additional triangular openings. The geogrid thus includes three different repeating geometric shapes. The inner hexagons preferably also can move up and down, out of the plane of the geogrid. The multi-axial integral geogrid thus provides a geometry that can better engage with, confine and stabilize a greater variety and quality of aggregates.

Abstract: A catheter assembly according to the present invention includes a handle assembly, an introducer sheath, and a distal tip assembly. The distal tip assembly can include first and second retaining sleeves and a slotted tip with a non-traumatic tip guard positioned at the proximal end of the slotted tip. The handle assembly can include a fixed main handle and two or more rotating handles that allow a user to control the distal tip assembly of the catheter. Each control knob on the handle assembly controls a portion of the components on the distal tip of the catheter by allowing for precise manipulation of various delivery shafts. Each delivery shaft extends from the handle assembly to respective positions towards the distal end of the catheter.

Abstract: A model of the viscoplastic boundary layer of a yield stress fluid is described and, based on which, there is provided a method of estimating the yield stress of a flowing yield stress fluid using one or more vibratory transducers having a vibratory surface in contact with the yield stress fluid, the method comprising: vibrating a vibratory surface of a vibratory transducer to transmit a wave from a vibrating surface into a viscoplastic boundary layer of the flowing yield stress fluid, the wave propagating a distance into the viscoplastic boundary layer; making, using the vibrations of the vibratory transducer, one or more measurements of the degree of damping of vibration; and estimating the yield stress of the flowing yield stress fluid based on the one or more measurements of the degree of damping of vibration. There are disclosed single-frequency, dual-frequency and triple-frequency modes of operation.

Abstract: A model of the viscoplastic boundary layer of a yield stress fluid is described and, based on which, there is provided a method comprises the steps of: vibrating a vibratory transducer at resonance at a first resonant mode in a yield stress fluid and making a first measurement of the resonant frequency; providing a vibration to liquefy at least a portion of the yield stress fluid around the one or more vibratory transducers; while said portion of the yield stress material is liquefied, vibrating a vibratory transducer at resonance at the first resonant mode in the yield stress fluid and making a second measurement of the resonant frequency; and estimating the yield stress of the yield stress fluid based on the first and second measurements. The vibration to liquefy yield stress fluid around the one or more transducers may be provided by the making of the second measurement at an increased amplitude of vibration relative to the first measurement.

Abstract: A multilayer integral geogrid, including one or more cellular layers, has a plurality of oriented multilayer strands interconnected by partially oriented multilayer junctions with an array of openings therein. The multilayer integral geogrid having one or more cellular layers is produced from a coextruded or laminated multilayer polymer starting sheet. The integral geogrid has a multilayer construction, with at least one outer layer thereof having the cellular structure. By virtue of the cellular layer structure, the multilayer integral geogrid provides for increased layer vertical compressibility under load, resulting in enhanced material properties that provide performance benefits to use of the multilayer integral geogrid to stabilize and strengthen soil, aggregates, or other particulate materials.

Abstract: A monolayer multi-axial integral geogrid suitable for stabilizing aggregate includes a plurality of interconnected oriented strands and partially oriented junctions forming a repeating pattern of outer hexagons having an array of openings therein. Oriented ribs extending inwardly from each of said outer hexagons support and surround a smaller inner hexagon having oriented strands thus forming a plurality of trapezoidal openings and a single hexagonal opening. The oriented strands and partially oriented junctions of the outer hexagons form a plurality of linear strong axis strands that extend continuously throughout the entirety of the geogrid and form additional triangular openings. The geogrid thus includes three different repeating geometric shapes. The inner hexagons preferably also can move up and down, out of the plane of the geogrid. The multi-axial integral geogrid thus provides a geometry configured to engage with, confine and stabilize a large variety and quality of aggregates.

Abstract: Embodiments hereof relate to a delivery system for a transcatheter valve prosthesis, the delivery system having an integral centering mechanism to circumferentially center both the delivery system and the valve prosthesis within a vessel at the target implantation site. The centering mechanism may include expandable wings that may be selectively aligned with openings formed through a sidewall of an outer shaft of the delivery system, a coiled wing that may be selectively exposed through an opening formed through a sidewall of an outer shaft of the delivery system, a plurality of elongated filaments extending through a plurality of lumens of an outermost shaft of the delivery system that may be selectively deployed or expanded, an outer shaft that includes at least one pre-formed deflection segment formed thereon, a tool having a deployable lever arm, and/or a plurality of loops deployable via simultaneous longitudinal and rotational movement.

Abstract: Aspects of a geogrid system for improving substrate interactions within a geotechnical environment is disclosed. In one aspect features of a geogrid system aid in trapping and restraining aggregate and soil. In one aspect a geotechnical environment is configured with a horizontal multilayer mechanically stabilizing geogrid. In said aspect the geogrid is extruded with a polymeric material and a compressible cellular layer. In said aspect, the horizontal multilayer mechanically stabilizing geogrid is comprised of either a cap or a core of polymeric material or is further comprised of at least one compressible cellular layer configured to the polymeric material. Further, the horizontal multilayer mechanically stabilizing geogrid is configured with a triangle or triaxial geometry with patterned discontinuities and a plurality of strong axes. Said configuration increases soil and aggregate trapping while reducing polymeric use.

Abstract: Heart valve delivery systems and methods of delivering and implanting heart valves using delivery catheters are disclosed. The delivery systems can include a handle assembly which can include a first control mechanism, a second control mechanism, and a decoupling mechanism. The delivery systems can also include a delivery catheter extending from the handle assembly. The delivery catheter can include an outer shaft, which can be controlled by the first control mechanism; a prosthesis containing capsule comprising a proximal capsule portion connected to the outer shaft, and a distal capsule portion releasably coupled to the proximal capsule portion. After deploying a valve prosthesis, the capsule can be closed by activating the decoupling mechanism in the handle to rapidly close the distal and proximal capsule portions together. The delivery system can also include a centering element to guide the distal and proximal capsule portions together.

Abstract: A monolayer multi-axial integral geogrid suitable for stabilizing aggregate includes a plurality of interconnected oriented strands and partially oriented junctions forming a repeating pattern of outer hexagons having an array of openings therein. Oriented ribs extending inwardly from each of said outer hexagons support and surround a smaller inner hexagon having oriented strands thus forming a plurality of trapezoidal openings and a single hexagonal opening. The oriented strands and partially oriented junctions of the outer hexagons form a plurality of linear strong axis strands that extend continuously throughout the entirety of the geogrid and form additional triangular openings. The geogrid thus includes three different repeating geometric shapes. The inner hexagons preferably also can move up and down, out of the plane of the geogrid. The multi-axial integral geogrid thus provides a geometry that can better engage with, confine and stabilize a greater variety and quality of aggregates.

Abstract: Example embodiments provided relates to a computing device of a group-based communication system configured to categorize multiple group-based communication messages in a workspace.

Abstract: A guidewire is coupled to a control module and extends through a lumen of the control module. The control module operates to transition between a first control state wherein the control module allows movement of the guidewire relative to a catheter and a second control state wherein relative axial movement between the catheter and guidewire is prevented.

Abstract: Embodiments of the present disclosure provide methods, systems, apparatuses, and computer program products that are configured to generate a predicted channel add object in an improved system of networked computing devices. The embodiments disclose an apparatus and system that provide channel invite suggestions. The channel invite suggestions comprise recommendations of users to invite to group-based communication channels. To provide the channel-invite suggestions, the group-based communication system generates a user-channel data structure that stores a plurality of values that capture relationships between users and group-based communication channels. The values may capture information regarding membership of a user in a group-based communication channel, starring of a group-based communication channel by a user, a level of activity of a user in a group-based communication channel, and a user's word usage in a group-based communication channel.

Abstract: The example embodiments provided relate to a group-based communication system configured to categorize multiple communication messages in a workspace by determining one or more conversation primitive identifiers for each of the multiple communication messages. In some examples, the group-based communication system may group each of the multiple communication messages into one or more conversation segments based on the one or more conversation primitive identifiers.

Abstract: In some embodiments, a medical device delivery system includes a catheter and a retainer. The retainer can be engaged with the medical device to restrain relative movement of the medical device in one or more axial and/or radial directions. A variety of retainers and retainer systems are disclosed, many of which can reliably disengage the medical device from the retainer. Methods for using the medical device delivery system are also described.

Abstract: A crimping device for reducing the size of prosthetic heart valve devices and other medical devices. A hydraulically operated piston advances a pusher toward an opening of a funnel. An interior surface of the funnel is configured to provide substantially uniform compression forces to a prosthetic heart valve device between the pusher and the funnel as the pusher advances the prosthetic heart valve device into the funnel. A system may comprise the crimping device and a prosthetic heart valve device positioned between the pusher and the funnel. A technique for using the crimping device includes delivering a pressurized fluid and crimping a prosthetic heart valve device using the interior surface of the funnel.