Abstract: An on-demand economy operating system is provided. The system matches supply and demand in products and services based on provider-shared supply data and operational system-determined demand data. Quotes, purchase agreements, bills and payments are seamlessly generated and published between participants in the on-demand economy, such as via a blockchain. The system provides continuous analysis and utilizes resulting success metrics to further improve efficiencies of the system. Methods and machine readable media are also provided.

Abstract: Described herein is a convenient set-up of a play structure, similar to a maze or multi-room play house without the use of tape or external connectors outside of the structure design. The panel component-based play area structure system will allow users to reduce the set-up time required for custom play structures as it is based on a simple individual partitions or panels designed to fit together to form a multiple room, or partitioned structure. The individual panel partitions allow the user to form customizable portals thereby customizing access to the individual partitioned sections.

Abstract: A respirator leak detection system and method for increasing the sensitivity and accuracy of leak detection through the fit seal of a respirator. A charged particle separator is used to separate charged particles that pass therethrough and to draw charged particles away from an aerosol flow into a clean gas flow. The separator may also be configured as an aerosol concentrator that takes in a major aerosol flow and outputs a minor flow of higher particle concentration. Neutral particles having no charge, which may have passed through the filtering medium respirator and which are not indicative of fit seal leaks are not entrained in the output flow for subsequent detection, thus increasing the accuracy of the filter leak detection system.