Abstract: A liquid desiccant (LD)-based dehumidification system is provided for heating, ventilation, air conditioning and refrigeration (HVAC&R) systems. The LD-based dehumidification system includes a tank containing LD, a contact media device including media for disposition in a flow of air to be dehumidified and a sump disposed below the media to receive LD drained from the media, a pump and valve system to pump the LD from the tank to the contact media device to wet the media and from the sump to the tank, a heat exchanger through which LD, which is pumped from the sump to the tank, flows, a sensing system to sense one or more conditions of the LD and a controller to control the pump and valve system in accordance with a system status and the one or more conditions of the LD.

Abstract: A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

Abstract: A heat exchanger is disclosed. The heat exchanger includes a hollow tube extending from a tube inlet to a tube outlet. The hollow tube includes a wall that includes a core of a first aluminum alloy, and a cladding over the core of a second aluminum alloy. The second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, or gallium, or combinations thereof. A first fluid flow path is disposed along an inner surface of the wall from the tube inlet to the tube outlet, and a second fluid flow path is disposed across an outer surface of the wall.

Abstract: A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

Abstract: In an example, a method for solving problems involving a Hierarchical Physical and/or Engineering System (HPES) includes: receiving, by a computing system, a declarative object-oriented definition of the HPES having one or more sub-systems and/or one or more components; receiving, by the computing system, a definition of a first problem to be solved, wherein the first problem comprises at least one of: an optimization problem or an inverse problem; processing, by the computing system, the declarative object-oriented definition of the HPES to generate a data structure representing relationships and interactions between the one or more subsystems and/or the one or more components of the HPES; transpiling, by the computing system, a first optimized code using the data structure, the declarative object-oriented definition and the definition of the first problem; and generating, by the computing system, a solution to the first problem by executing the first optimized code.

Abstract: A heat exchanger includes a first manifold, aa second manifold, at least one heat exchange tube segment extending between and fluidly coupling the first manifold and the second manifold, and a fin having a non-linear configuration. A portion of the fin is affixed to an adjacent surface of the at least one heat exchange tube segment via a braze joint. The braze joint has a length, measured parallel to a length of the at least one heat exchange tube segment, less than or equal to 650 micrometers.

Abstract: This disclosure provides techniques for manufacturing parts using digital twin(s) to manage various aspects of the manufacturing system. An example method may include representing a manufacturing system using a digital twin. In some cases, representing the manufacturing system includes modeling, in the digital twin, digital representations that correspond to a number of physical components of the manufacturing system. The physical components include at least: a manufacturing material, a working environment for deposition of the manufacturing material (e.g., for additive manufacturing), a tool to manipulate the manufacturing material between at least two matter states in the working environment, and sensors measuring behaviors of the tool, the working environment, and the manufacturing material. The method may further include receiving a manufacturing production task.

Abstract: Joint reduction simulation training devices include a proximal bone component, and a distal bone component adjacently positioned relative to the proximal bone component. The proximal bone component is provided with a dislocation guide operatively cooperating with an opposed terminal end of the distal simulated bone component to provide a simulated joint between the proximal and distal bone components. The dislocation guide includes a dislocation and reduction sockets establishing dislocated and reduction positions of the distal simulated bone component relative to the proximal bone component when the terminal end of the distal simulated bone component is physically positioned within either the dislocation socket or the reduction socket.

Abstract: In some examples, a method includes downloading, from an application provider, a patch to be applied to a first application element and a stripped version of the application that does not include one or more application elements to be reused during installation of the application, decompressing the first application element to generate a decompressed version of the first application element, and decompressing the patch to generate a decompressed version of the patch. The method may also include applying the decompressed version of the patch to the decompressed version of the first application element to generate a patched application element, compressing the patched application element to generate a compressed patched application element, and installing the application using the compressed patched application element, the stripped version of the application, and the one or more application elements other than the first application element.

Abstract: Disclosed is a method of anodizing the interior surface of a heat transfer tube comprising placing a plurality of contact electrodes in electrical communication with, and along, an exterior surface of the heat transfer tube, inserting a counter electrode into an interior space of the heat transfer tube, providing an electrolytic solution to the interior space of the heat transfer tube, passing an electric current between the plurality of contact electrodes and the counter electrode through the electrolytic solution, forming an oxidation layer along the interior surface of the heat transfer tube, wherein the oxidation layer has an oxidation layer thickness that decreases along a length of the heat transfer tube, stopping the passage of the electric current, removing the electrolytic solution, and applying a sealing solution to a surface of the oxidation layer to form a sealed oxidation layer along the interior surface of the heat transfer tube.

Abstract: Medical dressings include a non-woven polymeric nanofiber mat embedded within a chitosan hydrogel matrix. The dressings may be obtained by electro spinning of polymeric nanofibers and thereafter incorporating a chitosan hydrogel into interstices of the mat by vacuum or positive pressure assistance. The resulting medical dressings may be optically transparent (e.g., at least about 50% up to about 95% light transmittance), flexible, and mechanically robust. The dressings may also incorporate self-adhesion promoters to allow self-adhesion to biological tissue, e.g., ocular surfaces, and/or therapeutic agents which are capable of delivering therapeutics (e.g. stem cells, drugs and the like) to the tissue surface. The dressings are especially useful as ocular bandages for the treatment and repair of ocular wounds.

Abstract: A heat transfer system is disclosed that includes a heat transfer fluid circulation loop, and also a heat exchanger that includes an aluminum alloy exterior surface having thereon a top surface coat derived from a composition comprising a trivalent chromium salt and an alkali metal hexafluorozirconate.

Abstract: An anodization apparatus is disclosed that includes an anode holder adapted to hold a tube, such that the tube is adapted to receive electrolyte and the tube has a first surface profile formed on an inner surface of the tube. The anodization apparatus also includes a cathode holder adapted to hold a cathode concentrically in the tube, such that the cathode has a second surface profile formed an outer surface of the cathode and the outer surface faces the inner surface of the tube. The cathode holder and the anode holder are adapted to supply electric potential of a predetermined current density to the cathode and the tube, respectively, and a surface area ratio between the first surface profile and the second surface profile is maintained within a predetermined range to facilitate formation of a homogenized anodized coat on the second surface profile.

Abstract: A compressor is disclosed, including an outer casing and a fluid guide around a cavity within the casing. An inlet is in operative fluid communication with the cavity, and an outlet is also in operative fluid communication with the cavity. A prime mover includes an actuator disposed in the cavity. The actuator includes a surface arranged to receive fluid in the cavity from the inlet, impart compression to received fluid in the cavity, and discharge compressed fluid to the outlet. A surface of the compressor includes a cladding of a second aluminum alloy over a core of a first aluminum alloy, wherein the second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, gallium, or combinations thereof.

Abstract: A heat transfer system is disclosed that includes a heat transfer fluid circulation loop, and also a heat exchanger that includes an aluminum alloy exterior surface having thereon a top surface coat derived from a composition comprising a trivalent chromium salt and an alkali metal hexafluorozirconate.

Abstract: A heat exchanger is disclosed. The heat exchanger includes a hollow tube extending from a tube inlet to a tube outlet. The hollow tube includes a wall that includes a core of a first aluminum alloy, and a cladding over the core of a second aluminum alloy. The second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, or gallium, or combinations thereof. A first fluid flow path is disposed along an inner surface of the wall from the tube inlet to the tube outlet, and a second fluid flow path is disposed across an outer surface of the wall.

Abstract: A heat exchanger is disclosed. The heat exchanger includes a hollow tube extending from a tube inlet to a tube outlet. The hollow tube includes a wall that includes a core of a first aluminum alloy, and a cladding over the core of a second aluminum alloy. The second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, or gallium, or combinations thereof. A first fluid flow path is disposed along an inner surface of the wall from the tube inlet to the tube outlet, and a second fluid flow path is disposed across an outer surface of the wall.

Abstract: This disclosure provides techniques for manufacturing parts using digital twin(s) to manage various aspects of the manufacturing system. An example method may include representing a manufacturing system using a digital twin. In some cases, representing the manufacturing system includes modeling, in the digital twin, digital representations that correspond to a number of physical components of the manufacturing system. The physical components include at least: a manufacturing material, a working environment for deposition of the manufacturing material (e.g., for additive manufacturing), a tool to manipulate the manufacturing material between at least two matter states in the working environment, and sensors measuring behaviors of the tool, the working environment, and the manufacturing material. The method may further include receiving a manufacturing production task.

Abstract: A wear indicator system may include a switch assembly having a housing, a wear indicator circuit, and an actuator assembly. The housing may connect to a collector shoe assembly having a collector shoe that slides in contact along a conductor bar of a conductor bar assembly, for transferring electrical power between the collector shoe and the conductor bar. The wear indicator circuit may include a communication unit and a switch unit. The actuator assembly may be operably coupled to the housing and to the switch unit and may track along the conductor bar assembly when the collector shoe assembly moves and may contact the conductor bar assembly to depress to a position to activate the switch unit responsive to the collector shoe reaching a designated wear level. The communication unit may communicate a signal indicative of the designated wear level responsive to the switch unit being activated.

Abstract: A heat exchanger includes a first manifold, aa second manifold, at least one heat exchange tube segment extending between and fluidly coupling the first manifold and the second manifold, and a fin having a non-linear configuration. A portion of the fin is affixed to an adjacent surface of the at least one heat exchange tube segment via a braze joint. The braze joint has a length, measured parallel to a length of the at least one heat exchange tube segment, less than or equal to 650 micrometers.