Abstract: Methods, systems, and non-transitory computer readable storage media are disclosed for implementation of executing operations with one or more hardware processors to access a tenant database within a multi-tenant environment and generate mapping records for one or more user accounts and one or more objects by executing an eager evaluation model in response to creation of an access policy. The disclosed systems generate policy subject mappings mapping the access policy to user accounts based on attributes of the user account and policy object mappings mapping the access policy to objects according to the attributes of the objects. Upon receiving a request from a user account to access an object within the tenant database, the disclosed systems provide access to the one or more objects based on the policy subject mappings, the policy object mappings, and attributes of the user account.

Abstract: A nuclear fusion reactor includes a first confinement element having axial ends, which define an inner region configured to have a first plasma population disposed therein and produces an axial magnetic field between the axial ends, the axial magnetic field configured to confine the first plasma population in the radial direction, and generate a magnetic mirror effect to confine the first plasma population in an axial direction at axial ends. Second and third confinement elements are disposed outside the first confinement element proximate to corresponding axial ends, and have a second and third plasma population disposed therein, respectively. The second and third plasma populations generate electrostatic barriers at the corresponding axial ends, to form a tandem mirror further confining the first plasma population in the inner region along the axial direction.

Abstract: Systems and methods of throttling incoming network traffic requests are provided. A data processing system can receive a request from a computing device via a computer network. The data processing system can determine a predicted number of incoming requests and a current available capacity of the data processing system. The data processing system, responsive to determining that the current available capacity of the data processing system is insufficient to process the predicted number of incoming requests, can assign a prioritization value to the request and determine a throttling threshold value based on the current available capacity of the data processing system, the predicted number of incoming requests, and a distribution of historical prioritization values. The data processing system can throttle the request responsive to determining that the prioritization value is below the determined throttling threshold value.