Abstract: Systems, methods, and storage media for settling transaction payments by linking third-party financial accounts to user profiles, issuing payment cards to users, and facilitating real-time physical and virtual payments to vendors. The user profiles display available assets for purchase by the users who submit requests to execute physical or virtual transactions. Once the request is submitted, the user's device will display a timestamped notification indicating their currently held assets, their respective account balances for at least one of their third-party financial accounts, or a combination thereof. Users can sell assets, withdraw funds from at least one of their third-party financial accounts, be connected to third-party brokers or third-party cryptocurrency exchanges, and exchange assets to fund their purchases.

Abstract: Systems, apparatus, and methods for duplicating a shear rate of a fluid in a process system and for sensing one or more properties at that shear rate. In some embodiments the process system is a blending system for frack water. In some embodiments, the systems comprise two spools: one spool containing a pH sensor and an oxidation reduction potential sensor whereby a controller senses the corresponding properties of the water therein. And whereby, if her sensed property is outside of a corresponding user selected range, the controller closes a valve to isolate the system from the process. Note that that systems of embodiments further comprise flow control valves to set a flowrate in the system to a value consistent with match a share rate in a process system with which the system might be in fluid communication.