Abstract: A method and apparatus for storing a cryogenic material, such as liquid hydrogen is described. The apparatus includes a liquid hydrogen storage container with a structural support system that enables frequent loading and unloading of the structural support system. The structural support system enables loading and unloading without permanent deformation or fatigue of the structural support system. The structural support system includes a plurality of support members which are oriented at an angle tangent to a portion of an inner shell, which forms a cavity holding the cryogenic material. The portion of the inner shell which the support member is tangent to is the portion of the inner shell closest to an end of the support member.

Abstract: Systems and techniques for privacy preserving document analysis are described that derive insights pertaining to a digital document without communication of the content of the digital document. To do so, the privacy preserving document analysis techniques described herein capture visual or contextual features of the digital document and creates a stamp representation that represents these features without included the content of the digital document. The stamp representation is projected into a stamp embedding space based on a stamp encoding model generated through machine learning techniques capturing feature patterns and interaction in the stamp representations. The stamp encoding model exploits these feature interactions to define similarity of source documents based on location within the stamp embedding space. Accordingly, the techniques described herein can determine a similarity of documents without having access to the documents themselves.

Abstract: A fluid injector system includes at least one injector for pressurizing and delivering at least one fluid from at least one fluid reservoir, at least one fluid path section providing fluid communication between a bulk fluid reservoir and a syringe connected to the at least one injector, and at least one sensor arranged along the at least one fluid path section. The at least one sensor includes an emitter configured to emit light through the at least one fluid path section, and a detector configured to receive the light emitted through the at least one fluid path section and generate an electrical signal based on at least one property of the received light.

Abstract: A cryogenic vessel includes an outer vessel at least partially formed from a reinforced concrete. The cryogenic vessel further includes an inner vessel disposed in the outer vessel. The cryogenic vessel further includes an airtight liner disposed between the inner vessel and the outer vessel, wherein the liner is anchored to the outer vessel. The cryogenic vessel further includes a vacuum space disposed between the inner vessel and the liner, wherein an insulation material is disposed in the vacuum space.

Abstract: A database manager is disclosed that retrieves database records having binary encoded data from a database and instantiating objects in an in-memory database. Binary encoding compresses data, allowing many subrecords to be stored a single blob field of a database record. Retrieving chunks from storage reduces transfer time by reducing the size of data and the number of operations needed to retrieve all the subrecords. The database manager receives database access requests from a database application. Changes made to the database objects and committed by the application are written back to the persistent database as versioned delta records. In a subsequent session, loading the database from storage includes first loading the most recent snapshot record, then applying changes to the data stored in delta records. The changes stored in the delta records are applied to the data in the snapshot record in the order in which they were made.

Abstract: A landing gear system for a vehicle includes a landing gear configured for reciprocating motion between a stowed position and a deployed position. The landing gear has a linkage with a first link rotatably coupled to a second link. The linkage reciprocates between folded and extended states when the landing gear reciprocates between the stowed and deployed positions, respectively. A fail-secure downlock includes first and second electromagnets fixedly positioned relative to the first and second links, respectively. The first electromagnet is proximate to the second electromagnet when the landing gear is in the stowed position. The first electromagnet is attracted to the second electromagnet when the downlock is in the locked state. The first electromagnet is repelled by the second electromagnet when the downlock is in the unlocked state.

Abstract: A landing gear system includes a landing gear assembly coupled to a body of a vehicle and configured for reciprocating motion between a retracted position and an extended position. A fail-secure uplock assembly is reciprocal between a locked state and an unlocked state. A first electromagnet and a first permanent magnet are mounted to the body, and a second electromagnet and a second permanent magnet are mounted to a component of the landing gear assembly. The first and second electromagnets generate magnetic fields with reversible polarities. When the landing gear assembly is in the retracted position, the first permanent magnet is attracted to the second permanent magnet. The first electromagnet is attracted to the second electromagnet when the uplock assembly is in the locked state and is repelled by the second electromagnet when the uplock assembly is in the unlocked state.

Abstract: A system, method, and computer program product are disclosed for a flow rate algorithm that utilizes changes in fluid pressure over a set time interval to calculate a true flow rate compared to a programmed flow rate, determine any over-delivery or under-delivery in the amount of fluid delivered over the set time interval, compensate for any determined over-delivery or under-delivery in the fluid flow rate over a subsequent set time interval, and repeat the flow rate algorithm for a series of subsequent set time intervals over the duration of a fluid injection procedure.

Abstract: A landing gear system for a vehicle includes a landing gear configured for reciprocating motion between a stowed position and a deployed position. The landing gear has a linkage with a first link rotatably coupled to a second link. The linkage reciprocates between folded and extended states when the landing gear reciprocates between the stowed and deployed positions, respectively. A fail-secure downlock includes first and second electromagnets fixedly positioned relative to the first and second links, respectively. The first electromagnet is proximate to the second electromagnet when the landing gear is in the stowed position. The first electromagnet is attracted to the second electromagnet when the downlock is in the locked state. The first electromagnet is repelled by the second electromagnet when the downlock is in the unlocked state.

Abstract: A landing gear system includes a landing gear assembly coupled to a body of a vehicle and configured for reciprocating motion between a retracted position and an extended position. A fail-secure uplock assembly is reciprocal between a locked state and an unlocked state. A first electromagnet and a first permanent magnet are mounted to the body, and a second electromagnet and a second permanent magnet are mounted to a component of the landing gear assembly. The first and second electromagnets generate magnetic fields with reversible polarities. When the landing gear assembly is in the retracted position, the first permanent magnet is attracted to the second permanent magnet. The first electromagnet is attracted to the second electromagnet when the uplock assembly is in the locked state and is repelled by the second electromagnet when the uplock assembly is in the unlocked state.

Abstract: A cassette for holding fluid path components for a fluid injector may include a body defining at least one feature for holding at least one fluid path component for the fluid injector; and a connecting member for removably connecting the body of the cassette to the fluid injector, the connecting member operatively connected to the body, wherein the connecting member comprises at least one pivotable connecting feature protruding from the body, and wherein each of the at least one pivotable connecting feature is configured for removably connecting to a corresponding connecting feature receiver on the fluid injector such that the body is pivotally movable relative to the fluid injector between a first, unlatched position and a second, latched position in which the at least one fluid path component on the body of the cassette is positioned for operative connection to a corresponding feature of the fluid injector.

Abstract: A database manager is disclosed that retrieves database records having binary encoded data from a database and instantiating objects in an in-memory database. Binary encoding compresses data, allowing many subrecords to be stored a single blob field of a database record. Retrieving chunks from storage reduces transfer time by reducing the size of data and the number of operations needed to retrieve all the subrecords. The database manager receives database access requests from a database application. Changes made to the database objects and committed by the application are written back to the persistent database as versioned delta records. In a subsequent session, loading the database from storage includes first loading the most recent snapshot record, then applying changes to the data stored in delta records. The changes stored in the delta records are applied to the data in the snapshot record in the order in which they were made.

Abstract: A digital content package includes first content comprising a video feature such as a motion picture or the like, and a user-selectable application configured to operate as follows. When activated using an icon off of a menu screen, the application records an identifier for scenes (discrete portions) of the first content that are selected by a user to generate a playlist. The user may select the scenes by indicating a start and end of each scene. The application saves the playlist locally, then uploads to a server. Via a user account at the server, a user may publish the playlist to a user-created distribution list, webpage, or other electronic publication, and modify the playlist by deleting or reordering scenes.

Abstract: A system, method, and computer program product are disclosed for a flow rate algorithm that utilizes changes in fluid pressure over a set time interval to calculate a true flow rate compared to a programmed flow rate, determine any over-delivery or un-der-delivery in the amount of fluid delivered over the set time interval, compensate for any determined over-delivery or under-delivery in the fluid flow rate over a subsequent set time interval, and repeat the flow rate algorithm for a series of subsequent set time intervals over the duration of a fluid injection procedure.

Abstract: A cassette for holding fluid path components for a fluid injector may include a body defining at least one feature for holding at least one fluid path component for the fluid injector; and a connecting member for removably connecting the body of the cassette to the fluid injector, the connecting member operatively connected to the body, wherein the connecting member comprises at least one pivotable connecting feature protruding from the body, and wherein each of the at least one pivotable connecting feature is configured for removably connecting to a corresponding connecting feature receiver on the fluid injector such that the body is pivotally movable relative to the fluid injector between a first, unlatched position and a second, latched position in which the at least one fluid path component on the body of the cassette is positioned for operative connection to a corresponding feature of the fluid injector.

Abstract: A fluid injector system includes at least one injector for pressurizing and delivering at least one fluid from at least one fluid reservoir, at least one fluid path section providing fluid communication between a bulk fluid reservoir and a syringe connected to the at least one injector, and at least one sensor arranged along the at least one fluid path section. The at least one sensor includes an emitter configured to emit light through the at least one fluid path section, and a detector configured to receive the light emitted through the at least one fluid path section and generate an electrical signal based on at least one property of the received light.

Abstract: A digital content package includes first content comprising a video feature such as a motion picture or the like, and a user-selectable application configured to operate as follows. When activated using an icon off of a menu screen, the application records an identifier for scenes (discrete portions) of the first content that are selected by a user to generate a playlist. The user may select the scenes by indicating a start and end of each scene. The application saves the playlist locally, then uploads to a server. Via a user account at the server, a user may publish the playlist to a user-created distribution list, webpage, or other electronic publication, and modify the playlist by deleting or reordering scenes.

Abstract: A DC powered solar tracker controller for controlling an angle of inclination of a table of an associated solar tracker assembly. The controller includes controller electronics and a motor driver selectively energized to actuate the drive mechanism and thereby pivot the table of the associated solar tracker assembly. The controller further includes a rechargeable battery for powering controller electronics, the rechargeable battery charged by a controller power source, and a heating element controlled by controller electronics. The heating element is disposed in proximity to the outer surface of the rechargeable battery. The controller also includes a temperature sensor electrically coupled to the controller electronics, the temperature sensor disposed in proximity to the rechargeable battery.

Abstract: A main fitting includes an elongate piston and a cylinder configured to slidingly receive the piston. A first end of the piston extends from a first end of the cylinder, and a second end of the piston extends from a second end of the cylinder. The first end of the cylinder comprises a bearing surface engaging the piston to limit translation of the piston relative to the cylinder to a longitudinal direction.

Abstract: A heat exchanger assembly including an elongated tubular heat exchanger enclosure defining an interior chamber. A tube sheet is positioned within the interior chamber of the heat exchanger enclosure separating the interior chamber into a shell side and a channel side. The interior portion is configured to removably receive a tube bundle positioned within the shell side of the interior chamber. An annular sleeve member is positioned within the channel side of the interior chamber of the heat exchanger enclosure. An annular elastic torsion member is positioned within the channel side of the interior chamber of the heat exchanger such that the sleeve member is positioned between the tube sheet and the elastic torsion member. The elastic torsion member has an inner circumference deflectable relative to its outer circumference for torsioning the elastic torsion member.