Abstract: An intubation assembly and shield configured to at least partially reduce the risk of contagion of airborne illnesses. The intubation assembly comprises an intubation apparatus assembly, which may comprise an intubation apparatus such as a laryngoscope, endoscope, bronchoscope, or other fiberoptic device. The intubation apparatus assembly may be operatively disposed on the shield assembly. The intubation apparatus may be placed on a correspondingly dimensioned sleeve. The shield assembly comprises a body with a plurality of side segments and a first transparent component with a shield opening disposed thereon. The shield opening may be used for insertion of the intubation apparatus assembly. The shield assembly may also comprise a second transparent component with at least one longitudinally disposed slot for insertion of an endotracheal tube or other intubation apparatus(es). The shield assembly may be provided with ports to attach a vacuum device to provide negative pressure.

Abstract: An Internet of Things (IoT) network includes an orchestrator to issue service management requests, a service coordinator to identify components to participate in the service, and a component to perform a network service element. An IoT network includes an IoT device with service enumerator, contract enumerator, and join contract function. An IoT network apparatus includes permissions guide drafter for discovered peers, and permissions guide action executor. An IoT network apparatus includes floating service permissions guide drafter for discovered hosts, host hardware selector, floating service permissions guide executor, and service wallet value transferor. An IoT network apparatus includes permissions guide drafter for first and second discovered peers, parameter weight calculator, permissions guide term generator, and permissions guide action executor.

Abstract: A handguard is for a firearm having a firearm upper. The handguard includes a body and a cam. The body is structured to be coupled to the firearm upper. The body has a central lumen having a longitudinal axis. The cam may be coupled to the body in substantially perpendicular alignment to the longitudinal axis, and is configured to rotate between an UNLOCKED position and a LOCKED position. When the cam rotates from the UNLOCKED position toward the LOCKED position, the cam rotates into the central lumen.

Abstract: Methods of detecting, characterizing, and mapping an environmental subsurface PFAS-stabilized viscoelastic non-Newtonian light non-aqueous phase liquid (LNAPL), including collecting an environmental sample that is a fluid sample, or is collected as a solid that is subsequently extracted with water to generate a fluid sample; and where the environmental sample is associated with a location where it was collected; analyzing the fluid sample using one or more rheological methods; and correlating the rheological characteristics with a presence or an absence of the non-Newtonian LNAPL at the location where the environmental sample was collected.

Abstract: Methods of detecting, characterizing, and mapping an environmental subsurface PFAS-stabilized viscoelastic non-Newtonian light non-aqueous phase liquid (LNAPL), including collecting an environmental sample that is a fluid sample, or is collected as a solid that is subsequently extracted with water to generate a fluid sample; and where the environmental sample is associated with a location where it was collected; analyzing the fluid sample using one or more rheological methods; and correlating the rheological characteristics with a presence or an absence of the non-Newtonian LNAPL at the location where the environmental sample was collected.

Abstract: Suppressor systems and apparatuses for use with firearms are provided. A suppressor includes a core, a main can, and a spring. The core defines a first channel that intersects a radially dispersed hole configuration and is configured to be coupled to a firearm. The main can is disposed around the core and includes a baffle structure. The baffle structure includes a plurality of baffles that define a second channel and a plurality of chambers intersecting the second channel. In various configurations, the core and/or the main are either a unitary piece or each formed from a plurality of components. The spring is configured to axially bias the main can with respect to the core, thereby providing for a valve action that controls a flow of a volume of gas produced by a discharge of the firearm.

Abstract: A barrel for use in a firearm optimized to fire subsonic ammunition with high precision. The barrel groove diameter being within 0.0003 inch of the nominal bullet diameter and the barrel has at least 8 rifled grooves. Each of the plurality of rifling grooves has a sidewall formed from the bore diameter to the groove diameter, wherein the sidewalls formed are substantially parallel and the depth of each of the rifling grooves is shallow. The bullet is obturated as the bullet is forced down the bore. The plurality of shallow barrel grooves forming a plurality of raised lands upon the bullet. The obturated bullet having at least 50% lands formed around the circumference of the bullet body. The buffeting effect upon the bullet in flight by a transition shock wave upon the raised bullet lands is reduced by the plurality of bullet lands and the reduced height of each of the plurality of bullet lands.

Abstract: A barrel for use in a firearm optimized to fire subsonic ammunition with high precision. The barrel groove diameter being within .0003 inch of the nominal bullet diameter and the barrel has at least 8 rifled grooves. Each of the plurality of rifling grooves has a sidewall formed from the bore diameter to the groove diameter, wherein the sidewalls formed are substantially parallel and the depth of each of the rifling grooves is shallow. The bullet is obturated as the bullet is forced down the bore. The plurality of shallow barrel grooves forming a plurality of raised lands upon the bullet. The obturated bullet having at least 50% lands formed around the circumference of the bullet body. The buffeting effect upon the bullet in flight by a transition shock wave upon the raised bullet lands is reduced by the plurality of bullet lands and the reduced height of each of the plurality of bullet lands.

Abstract: Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.

Abstract: Methods, apparatus, and kits for detecting and optionally quantifying amphiphilic compounds in the environment, in media samples, and on objects by determining an initial surface energy of a surface of a sample substrate, exposing the sample substrate surface to a medium that contains or is suspected to contain an amphiphilic compound for a time sufficient for the amphiphilic compound to interact with the sample substrate surface, determining a post-exposure surface energy of the surface of the sample substrate, determining a change in the surface energy of the sample substrate surface, and correlating the determined change in surface energy of the sample substrate surface with a presence and/or character of amphiphilic compounds in the medium.

Abstract: Apparatus and methods for removing, measuring, and/or mapping per- and polyfluoroalkyl substances (PFAS) present in porous media such as soils, sludges, and colloids by employing both direct and indirect heating methods to transfer thermal energy to the media undergoing treatment. The contaminated media is placed within a media treatment enclosure that incorporates a thermal jacket, and radiatively heated by circulating a heated gas through the thermal jacket. The contaminated media is directly heated by injecting heated treatment gas into the media treatment enclosure. The heated treatment gas is drawn over and/or through the contaminated media to mobilize contaminants from the media and into the treatment gas, which is then collected and processed to recover the contaminant.

Abstract: Apparatus and methods for a non-destructive recovery of PFAS contaminants from a variety of media, the apparatus including 1) a polarity conversion unit for non-destructive PFAS removal from soil, sludges, filter media, and objects; 2) a brine pot evaporator for recovering PFAS from foams and fluids; 3) a fluids treatment system for PFAS removal from treated fluids; and 4) an amphiphilic decontamination wand for PFAS removal from hard surfaces.

Abstract: Methods of treating porous media, including methods of nondestructive removal of PFAS contaminants from soil, and apparatus for carrying out thermal decontamination of porous substrates. The thermal decontamination apparatus sinters and shapes the media to be remediated, and then provides sequential sectionalized treatment using treatment gases that are drawn through the sintered media, extracted, and then treated to remove contaminants extracted from the treated media.

Abstract: Sintered Wave Multi-Media Polarity Conversion Treatment Apparatus and Process is disclosed, which uses a non-destructive physiochemical PFAS vapor emissions treatment system to provide vacuum and vapor conveyance for 1) a Polarity Conversion Unit for non-destructive PFAS removal from soil, sludges, rechargeable galvanic filter media and objects, 2) a fluids treatment line for PFAS removal from water, brines, foams and colloids, and 3) an amphiphilic decontamination wand for PFAS removal from hard surfaces. The vapor emissions treatment system uses direct spray cooling to cool treatment gases where fluid chemistry causes pre-micellular aggregates/liquids crystals formation. Filtered aggregates are dried in a Brine Pot Evaporator for off-site disposal. Residual PFAS vapors are removed through a Vapor Phase Galvanic Separator where galvanic currents offer high energy interfaces of varying charges for monomeric PFAS self-assembly.

Abstract: Sintered Wave Porous Media Treatment and Apparatus and Process is disclosed, which uses an automated static enclosed arrangement to efficiently remove water, organic contaminants (petroleum, solvents, pcbs, pesticides) and per- and polyfluoroalkyl substances (PFAS) and fluorinated related compounds from large volumes of porous media such as a mixture of soil, gravel, rocks, sediments or other porous media. The Sintered Wave technology is a multipurpose treatment device that uses a Sinter Craft as a treatment vessel that allows earth moving machines to easily enter and exit during loading/unloading. The soil is then conditioned to accommodate treatment by sintering (densifying) by vibrating the soil bed, which removes soil vapor and fluids. The soil bed is then shaped by placing hexagonal holes or slots containing 120 degree angles from top to the bottom of the soil bed.

Abstract: A blast control device for a firearm is disclosed. The blast control device may include a muzzle brake comprising a first end, a second end, a top, a bottom, a bore, one or more baffles, one or more gas openings disposed between the one or more baffles, an alignment channel disposed on the top, one or more gas holes disposed on the top within the alignment channel, an alignment groove disposed at an end of the alignment channel, and a latch notch. The blast control device also may include a blast shield attachable around the muzzle brake. The blast shield may include an alignment protrusion, a latch assembly, a plurality of internal ribs, and one or more gas ports.

Abstract: An adjustable buttstock may be attachable to a buffer tube with a plurality of position slots. The adjustable buttstock may include a body slidably attached to the buffer tube, a butt attached to the body, and a lever assembly rotatably attached to the body.

Abstract: A barrel nut assembly for a firearm is disclosed. The barrel nut assembly may include a barrel nut comprising a plurality of expansion flanges. The barrel nut assembly also may include an expansion plug comprising an expansion surface. The expansion surface may be configured to abut and expand the plurality of expansion flanges when the expansion plug is attached to the barrel nut.

Abstract: An adjustable buttstock may be attachable to a buffer tube with a plurality of position slots. The adjustable buttstock may include a body slidably attached to the buffer tube, a butt attached to the body, and a lever assembly rotatably attached to the body.

Abstract: A travel limiting device is disclosed. In one embodiment, the device may be positionable within a position slot and a channel in a buffer tube of a firearm to limit the adjustability of a buttstock. The device may include a main body having a stop surface. The main body may be positionable within the channel. The device also may include a protrusion extending from the main body. The protrusion may be positionable within the position slot.