Abstract: Systems and methods of producing potassium sulfate can involve converting a mixed salts feed stream into a conversion end slurry in a conversion unit, the mixed salts feed comprising at least one potassium-containing salt, at least one chloride-containing salt, at least one magnesium-containing salt and at least one sulfate-containing salt and the conversion end slurry comprising schoenite; separating conversion end slurry into a conversion end solids stream and a conversion brine; leaching the conversion end solids stream in a crystallization unit to produce a potassium sulfate product stream comprising potassium sulfate and a crystallizer mother liquor comprising magnesium sulfate and potassium sulfate; collecting heat generated in the conversion unit by a heat pump; and providing at least a portion of the heat collected to the crystallization unit to regulate a temperature of the potassium sulfate product stream and the crystallizer mother liquor stream contained in the crystallization unit.

Abstract: A haptic transducer is provided, comprising a motor including a yoke, an inner cavity formed by the yoke, and a magnet assembly disposed within the inner cavity; a diaphragm disposed above the magnet assembly; a suspension extending concentrically around the diaphragm and having an inner edge attached to the diaphragm and an outer edge attached to the yoke; a cylindrical coil coupled to the diaphragm and suspended within the inner cavity around the magnet assembly; a first hole extending through the motor; and a second hole axially aligned with the first hole and extending through the diaphragm, a fastener extending through the first hole into the second hole. A footplate system is also provided, comprising a footplate configured for placement in a piece of footwear; a moving motor transducer configured to transfer haptic sensations to the footplate; and a top fastener configured to secure the haptic transducer to the footplate.

Abstract: Systems and methods of producing potassium sulfate can involve converting a mixed salts feed stream into a conversion end slurry in a conversion unit, the mixed salts feed comprising at least one potassium-containing salt, at least one chloride-containing salt, at least one magnesium-containing salt and at least one sulfate-containing salt and the conversion end slurry comprising schoenite; separating conversion end slurry into a conversion end solids stream and a conversion brine; leaching the conversion end solids stream in a crystallization unit to produce a potassium sulfate product stream comprising potassium sulfate and a crystallizer mother liquor comprising magnesium sulfate and potassium sulfate; collecting heat generated in the conversion unit by a heat pump; and providing at least a portion of the heat collected to the crystallization unit to regulate a temperature of the potassium sulfate product stream and the crystallizer mother liquor stream contained in the crystallization unit.

Abstract: A device for detecting spatial differences in fluid level changes in a tissue of a patient may include a support structure for securing the device to a body part of the patient, a processing element operably connected to the support structure, a wireless networking interface operably connected to the support structure and in communication with the processing element and an external computing device via a network, a first transmission module operably connected to the support structure and in communication with the processing element, a second transmission module and a third transmission module operably connected to the support structure and in communication with the processing element. When activated, the first transmission module transmits a first time varying magnetic field through the tissue of the patient. The second and third transmission modules, which are spatially separated from one another, receive first and second versions, respectively, of the first time varying magnetic field.

Abstract: A lift chair frame is disclosed having an adjustable seat including a front support bar assembly including a left member and a right member connected to the left member, a rear support bar assembly opposite the front support bar assembly along a longitudinal direction, a left support bar connected to the front and rear support bar assemblies, and a right support bar opposite the left support bar along a lateral direction that is perpendicular to the longitudinal direction and connected to the front and rear support bar assemblies.

Abstract: Systems and methods of forming transducer diaphragms are disclosed herein. In one embodiment, a method of producing a transducer diaphragm includes receiving a workpiece between a first forming tool and a second forming tool. The workpiece can have an inner boundary defining a central aperture. The workpiece with the aperture is compressed between the first and second forming tools to form the transducer diaphragm.

Abstract: The present railway car hatch cover latch assembly includes a latch plate. One end of the latch assembly rod is affixed to a bracket, with the adjustable end usually comprising an eye at the end of a threaded shaft. The threaded shaft is received in a keeper. The keeper in turn supports and holds a coil spring between the eye and the keeper cap. A bent hooking rod has two upturned ends that hold the end of the coil spring nearest the eye. The center of the bent hooking rod extends from the keeper to form a receiver. A latch plate includes a pivot rod that extends through the receiver of the bent hooking rod. The latch paddle itself contacts and holds the hatch cover is a compressively closed position against the railway car hatch ring.

Abstract: A digital image of a speaker spider may be received from an optical microscope or laser microscope. The digital image is filtered to fill in voids in the digital image, where the voids are indicative of holes in the speaker spider. The filtered digital image is compared to design criteria. An indication on a display screen may indicate whether the fabricated speaker spider meets the design criteria.

Abstract: A lift chair frame is disclosed having an adjustable seat including a front support bar assembly including a left member and a right member connected to the left member, a rear support bar assembly opposite the front support bar assembly along a longitudinal direction, a left support bar connected to the front and rear support bar assemblies, and a right support bar opposite the left support bar along a lateral direction that is perpendicular to the longitudinal direction and connected to the front and rear support bar assemblies.

Abstract: A lift chair frame is disclosed having an adjustable seat including a front support bar assembly including a left member and a right member connected to the left member, a rear support bar assembly opposite the front support bar assembly along a longitudinal direction, a left support bar connected to the front and rear support bar assemblies, and a right support bar opposite the left support bar along a lateral direction that is perpendicular to the longitudinal direction and connected to the front and rear support bar assemblies.

Abstract: A diaphragm for a loudspeaker may include a conductive coupler, a voice coil having a voice coil lead, where the voice coil lead is positioned in conductive contact with the conductive coupler, and a terminal lead, where the terminal lead is positioned in conductive contact with the conductive coupler, and where the voice coil lead and the terminal lead are attached to the conductive coupler.

Abstract: A diagnostic method for monitoring changes in a fluid medium in a patient's head. The method includes positioning a transmitter at a first location on or near the patient's head, the transmitter generates and transmits a time-varying magnetic field into a fluid medium in the patient's head responsive to a first signal; positioning a receiver at a second location on or near the patient's head offset from the transmitter, the receiver generates a second signal responsive to a received magnetic field at the receiver; transmitting a time-varying magnetic field into the fluid medium in the patient's head in response to the first signal; receiving the transmitted magnetic field; generating the second signal responsive to the received magnetic field; and determining, a phase shift between the transmitted magnetic field and the received magnetic field for a plurality of frequencies of the transmitted time-varying magnetic field.

Abstract: A centralized communication system (CCS) is disclosed that provides a modular, extendible, and scalable communication system that can exchange information between any information systems or networked devices. Information from a single source device or system can be selectively broadcast to one or more predetermined destination devices and systems rather than broadcast to every device on the network. Information may be filtered and processed at one or more selectable points in the communication flow between systems. In certain embodiments, an incoming message is received from the source device in the native message format using the native protocol of the source device and converted to an internal messaging format for internal handling within the CCS, then converted to the native message format of a receiving system and sent to the receiving system using its native protocol. In certain embodiments, a graphical representation of the topology of the CCS may be provided.

Abstract: Systems and processes for operating an intelligent automated assistant are provided. In one example process, a speech input is received from a user. In response to determining that the speech input corresponds to a user intent of obtaining information associated with a user experience of the user, one or more parameters referencing a user experience of the user are identified. Metadata associated with the referenced user experience is obtained from an experiential data structure. Based on the metadata, one or more media items associated with the referenced are retrieved based on the metadata. The one or more media items associated with the referenced user experience are output together.

Abstract: A centralized communication system (CCS) is disclosed that provides a modular, extendible, and scalable communication system that can exchange information between any information systems or networked devices. Information from a single source device or system can be selectively broadcast to one or more predetermined destination devices and systems rather than broadcast to every device on the network. Information may be filtered and processed at one or more selectable points in the communication flow between systems. In certain embodiments, an incoming message is received from the source device in the native message format using the native protocol of the source device and converted to an internal messaging format for internal handling within the CCS, then converted to the native message format of a receiving system and sent to the receiving system using its native protocol. In certain embodiments, a graphical representation of the topology of the CCS may be provided.

Abstract: A system for providing an estimate of far-field radar cross-section (RCS) measurements of an aircraft. The system includes a plurality of automatic guided vehicles (AGV) each including a robot arm and a radar unit selectively mounted thereto and being interchangeable with a camera. Each AGV includes an AGV controller for controlling the robot arm, the radar unit and the camera so as to cause the radar unit to provide the near-field RCS measurements or the camera to provide images of the aircraft. The system further includes a real time signature diagnostic sub-system (SDS-RT) responsive to the near-field RCS measurement signals from the radar units and the images from the cameras in real time, and an SDS controller responsive to re-configured near-field RCS measurement signals and images from the SDS-RT and configuring the near-field RCS measurement signals and the images into the estimate of the far-field RCS measurements of the aircraft.

Abstract: A diagnostic method for monitoring changes in a fluid medium in a patient's head. The method includes positioning a transmitter at a first location on or near the patient's head, the transmitter generates and transmits a time-varying magnetic field into a fluid medium in the patient's head responsive to a first signal; positioning a receiver at a second location on or near the patient's head offset from the transmitter, the receiver generates a second signal responsive to a received magnetic field at the receiver; transmitting a time-varying magnetic field into the fluid medium in the patient's head in response to the first signal; receiving the transmitted magnetic field; generating the second signal responsive to the received magnetic field; and determining, a phase shift between the transmitted magnetic field and the received magnetic field for a plurality of frequencies of the transmitted time-varying magnetic field.

Abstract: The present railway car hatch cover latch assembly includes a latch plate. One end of the latch assembly rod is affixed to a bracket, with the adjustable end usually comprising an eye at the end of a threaded shaft. The threaded shaft is received in a keeper. The keeper in turn supports and holds a coil spring between the eye and the keeper cap. A bent hooking rod has two upturned ends that hold the end of the coil spring nearest the eye. The center of the bent hooking rod extends from the keeper to form a receiver. A latch plate includes a pivot rod that extends through the receiver of the bent hooking rod. The latch paddle itself contacts and holds the hatch cover is a compressively closed position against the railway car hatch ring.

Abstract: A railway car hatch cover assembly is provided comprising an outer hatch cover, and a gasket retainer. A venting gasket is provided comprised of mesh venting material, and a hydrophobic coating is applied to the mesh venting material. The venting gasket forms a seal with the outer hatch cover and the hatch ring coaming. The hydrophobic coating is usually applied to an outer surface of the mesh venting material. The mesh venting material allows the passage of air therethrough, while providing a barrier to the passage of dirt or similar debris.

Abstract: A diaphragm for a loudspeaker may include a continuous primary diaphragm having an upper surface and a lower surface, where the primary diaphragm comprises a ring-shaped, flat region having an inner diameter and an outer diameter. The diaphragm may also include a reinforcing ring attached to the upper surface of the primary diaphragm, where the reinforcing ring has an inside diameter and an outside diameter, and where the reinforcing ring is attached to the upper surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region.