Abstract: A system includes a first sensor positioned to sense presence of a contrail in a first volume, wherein the first volume at least partially overlaps an expected volume of a contrail proximate an aircraft. A second sensor is positioned to sense a background reference in a second volume, where the second volume does not overlap the expected volume of a contrail proximate an aircraft. A controller is operatively connected to the first and second sensors. The controller includes machine readable instructions configured to cause the controller to utilize data input from both the first and second volumes to determine if a contrail is present from the aircraft. A system includes machine readable instructions configured to cause the controller to predict persistence of contrails on an intended route through the volume of airspace and to determine an improved route and/or propulsion operation to reduce contrail formation and persistence relative to the intended route.

Abstract: A laser eye surgery system produces a treatment beam that includes a plurality of laser pulses. An optical coherence tomography (OCT) subsystem produces a source beam used to locate one or more structures of an eye. The OCT subsystem is used to sense the distance between a camera objective on the underside of the laser eye surgery system and the patient's eye. Control electronics compare the sensed distance with a pre-determined target distance, and reposition a movable patient support toward or away the camera objective until the sensed distance is at the pre-determined target distance. A subsequent measurement dependent upon the spacing between the camera objective and the patient's eye is performed, such as determining the astigmatic axis by observing the reflection of a plurality of point source LEDs arranged in concentric rings off the eye.

Abstract: The disclosed technology generally relates to energy storage devices, and more particularly to energy storage devices comprising frustules. According to an aspect, a supercapacitor comprises a pair of electrodes and an electrolyte, wherein at least one of the electrodes comprises a plurality of frustules having formed thereon a surface active material. The surface active material can include nanostructures. The surface active material can include one or more of a zinc oxide, a manganese oxide and a carbon nanotube.

Abstract: In a threat management platform, a number of endpoints log events in an event data recorder. A local agent filters this data and feeds a filtered data stream to a central threat management facility. The central threat management facility can locally or globally tune filtering by local agents based on the current data stream, and can query local event data recorders for additional information where necessary or helpful in threat detection or forensic analysis. The central threat management facility also stores and deploys a number of security tools such as a web-based user interface supported by machine learning models to identify potential threats requiring human intervention and other models to provide human-readable context for evaluating potential threats.

Abstract: A printed energy storage device includes a first electrode, a second electrode, and a separator between the first and the second electrode. At least one of the first electrode, the second electrode, and the separator includes frustules, for example of diatoms. The frustules may have a uniform or substantially uniform property or attribute such as shape, dimension, and/or porosity. A property or attribute of the frustules can also be modified by applying or forming a surface modifying structure and/or material to a surface of the frustules. A membrane for an energy storage device includes frustules. An ink for a printed film includes frustules.

Abstract: Aortic repair devices and associated systems and methods are disclosed herein. An aortic repair device configured in accordance with embodiments of the present technology can include a base member configured to be implanted in an aorta proximate to a diseased portion of the aorta, such as an aneurysm or dissection. The base member can direct blood flow past the diseased portion of the aorta to perfuse a portion of the aorta distal of the diseased portion. In some embodiments, one or more branch members can be coupled to the base member during the same or a separate intravascular procedure to perfuse one or more branching vessels of the patient's aorta. The branch members can be coupled to the base member via an ex situ or in situ fenestration formed through the base member.

Abstract: A copolyamide composition comprising a statistical copolyamide containing 70-99 wt % of diamine and dicarboxylic acid repeat units and 1-30 wt % of lactam or AA-BB repeat units, whereby incorporation of the comonomer lactam or AA-BB unit reduces the crystallization rate (longer crystallization times) while maintaining (1) high melting point, (2) low potential plate out, (3) low oxygen permeation, (4) high tensile strength and (5) puncture/tear resistance.

Abstract: A method of producing a polyamide elastomer comprising feeding a salt solution having a solids content of greater than or equal to 80% to a reactor having a phosphorous containing catalyst having a phosphorous level from 5 to 1000 part by million based on the total weight of the catalyst, feeding a polyether amine to the reactor, and reducing the pressure in the reactor once a target temperature is reached to polymerize the salt solution and the polyether amine to form the polyamide elastomer. The polyamide elastomer has particular uses as a cable tie and demonstrates improved cold-temperature applications while maintaining high strength, good flammability rating, and excellent processability.

Abstract: A terpolymer composition is described that contains a statistical amount of 50-98 wt % of a first repeating AA-BB comonomer unit; 1-25 wt % of a second repeating AA-BB comonomer unit; and 1-25 wt % of a repeating lactam comonomer unit or 1-25 wt % of a third repeating AA-BB comonomer unit, where the terpolymer composition exhibits a high melting point similar to that of PA66 while also exhibiting a significantly reduced crystallization rate and crystallization temperature.

Abstract: A copolyamide composition comprising a statistical copolyamide containing 70-99 wt % of diamine and dicarboxylic acid repeat units and 1-30 wt % of lactam or AA-BB repeat units, whereby incorporation of the comonomer lactam or AA-BB unit reduces the crystallization rate (longer crystallization times) while maintaining (1) high melting point, (2) low potential plate out, (3) low oxygen permeation, (4) high tensile strength and (5) puncture/tear resistance.

Abstract: Aortic repair devices and associated systems and methods are disclosed herein. An aortic repair device configured in accordance with embodiments of the present technology can include a base member configured to be implanted in an aorta proximate to a diseased portion of the aorta, such as an aneurysm or dissection. The base member can direct blood flow past the diseased portion of the aorta to perfuse a portion of the aorta distal of the diseased portion and/or various branch vessels. In some embodiments, one or more spanning members or other implants can be coupled (e.g., docked) to the base member during the same or a separate intravascular procedure to provide additional flow paths past the diseased portion.

Abstract: A polyamide composition comprising from 25 wt % to 90 wt % of a first polyamide comprising a non-aromatic polyamide formed from 50 wt % to 90 wt % PA66; from 10-50 wt % of a second polyamide comprising a polyamide copolymer; from 0.01-10 wt % of a first stabilizer comprising a lanthanoid-based compound; from 0.01-10 wt % of a second stabilizer comprising a copper-based compound; and from 0-65 wt % filler.

Abstract: An antimicrobial film comprising antimicrobial film comprising from 50 wt % to 99.99 wt % of a polyamide composition, and from 10 wppm to 6000 wppm of zinc (and/or copper) dispersed within the film; wherein the film demonstrates: an antimicrobial efficacy to Staphylococcus aureus and Escherichia coli log reduction greater than 2.0, as determined by ISO 22196 (modified), and a slow rate puncture resistance greater than 1.5 N/?m as measured according to ASTM F1306.

Abstract: Provided herein is a polymer composition comprising an aromatic polyamide comprising terephthalic units and isophthalic units or a 6T/DT copolymer and having an overall high aromaticity, with a heat stabilizer and/or a lubricant. The polymer composition demonstrates improved electrical performance in terms of volume resistivity and dielectric strength.

Abstract: A polyamide composition comprising a base polyamide and an elastomer concentrate comprising: 20-80 wt % of an elastomeric aliphatic polyether having a molecular weight ranging from 400-4000 g/mol; and 80-20 wt % of a concentrate polyamide. The polyamide composition has particular uses as a cable tie and demonstrates improved cold-temperature applications while maintaining high strength, good flammability rating, and excellent processability.

Abstract: Provided herein are polymer films including a polyamide composition of PA6 and PA66/6. The provided films are particularly useful as packaging materials as they exhibit improved toughness, e.g., puncture and impact resistance, relative to that of conventional films that include only PA6 as a polyamide component. Also provided are methods for making the provided films, and articles that include the provided films.

Abstract: Compounds are identified that act as crystallization suppressants when added to clear brine fluids, significantly lowering the true crystallization temperatures of the brines, and allowing for higher salt content in clear brine fluids. The crystallization suppressants of the invention also allow for the preparation of higher density zinc free brines. Crystallization suppressant blends are also identified that allow for the preparation of high density clear brine fluids with lower viscosities.

Abstract: A terpolymer composition is described that contains a statistical amount of 50-98 wt % of a first repeating AA-BB comonomer unit; 1-25 wt % of a second repeating AA-BB comonomer unit; and 1-25 wt % of a repeating lactam comonomer unit or 1-25 wt % of a third repeating AA-BB comonomer unit, where the terpolymer composition exhibits a high melting point similar to that of PA66 while also exhibiting a significantly reduced crystallization rate and crystallization temperature.

Abstract: A terpolymer composition is described that contains a statistical amount of 50-98 wt % of a first repeating AA-BB comonomer unit; 1-25 wt % of a second repeating AA-BB comonomer unit; and 1-25 wt % of a repeating lactam comonomer unit or 1-25 wt % of a third repeating AA-BB comonomer unit, where the terpolymer composition exhibits a high melting point similar to that of PA66 while also exhibiting a significantly reduced crystallization rate and crystallization temperature.

Abstract: The present disclosure relates to polyamide compositions and resulting injection-molded articles that can be plated, e.g., metal coated, to form aesthetic injection-molded articles. The polyamide compositions may include from 45 wt. % to 75 wt. % of an polyamide, from 2 wt. % to 40 wt. % of an etchable filler, from 10 wt. % to 40 wt. % of a semi-structural mineral, and optionally from 0.1 wt. % to 13 wt. % of additive. The polyamide composition imparts very good surface appearance to injection-molded articles that are substantially free of visual defects.