Abstract: An example system in accordance with an aspect of the present disclosure includes an opening assembly and a guard assembly installable in a floor above an enclosed region. The opening assembly is actuatable between an open configuration to provide access to the enclosed region, and a closed configuration in which the opening assembly provides a closed surface. A guard assembly is mounted to the opening assembly and actuatable independent of the opening assembly, between a retracted configuration flush with the closed surface of the opening assembly, and a deployed configuration to serve as a guard for the opening assembly.

Abstract: An example system in accordance with an aspect of the present disclosure includes an opening assembly and a guard assembly installable in a floor above an enclosed region. The opening assembly is actuatable between an open configuration to provide access to the enclosed region, and a closed configuration in which the opening assembly provides a closed surface. A guard assembly is mounted to the opening assembly and actuatable independent of the opening assembly, between a retracted configuration flush with the closed surface of the opening assembly, and a deployed configuration to serve as a guard for the opening assembly.

Abstract: A data storage and retrieval system stores a collection of data in which a first portion is encrypted using a first cryptographic key, and comprises a second portion encrypting using a second cryptographic key. The data storage and retrieval system receives a request to query the collection on behalf of a security principal. The request comprises information indicative of the first and second keys. The system confirms the authorization of the security principal to access at least some of the collection of data, and generates intermediate results which comprise the encrypted first and second portions. The system causes the intermediate results to be decrypted using the first and second key information.

Abstract: A system provides credential management for computer systems and services within a customer data center by acting as an intermediary to an authentication service of a computing resource service provider. In an embodiment, an application server hosts an agent that is registered as a trusted provider of credentials. In an embodiment, the agent is cryptographically linked to the application server using a digital certificate. In an embodiment, the agent uses the digital certificate to authenticate with a credential server, and the credential server provides short-term credentials that may be used to access services of the computing resource service provider. In an embodiment, the short-term credentials are transmitted from the credential server to the agent, and the agent provides the credentials to one or more applications running on the application server. In an embodiment, the credentials allow the applications to access the services of the computing resource service provider.

Abstract: An interchangeable enclosed combustor for combustion of vapors includes: an interchangeable multi-paneled, multi-tiered combustor housing having a plurality of panels coupled together in polygonal form and further arranged in multiple tiers of polygonal forms, thereby to form a vertical, columnar, polygonal stack to flame combust combustible vapors; and a burner manifold disposed within the vertical, columnar, polygonal stack to flame combust combustible vapors to reduce toxic emissions. The burner manifold natural draft burners and nozzles are configured to the ratio of air and fuel to mix to achieve stoichiometric combustion and reduce harmful emissions at a rate >98% destruction efficiency and inlet pressure of <1 oz./in?2. The burner manifold includes at least one orifice of a predetermined size through which to draw fuel into a plurality of mixing chambers where air is drawn in through multiple stages of air intake ports that are sized based upon fuel type and pressure.

Abstract: System, apparatus and method for predictive management of college application information and college selection information may include a college admission event information handler and an application submission engine that may access a predictive college enrollment decision model, the college enrollment decision model building a financial aid offer model including an express strategic aid offer component determined from an express model of a strategic enrollment management system for a college.

Abstract: A vertical takeoff and landing aircraft, using for vertical lift and lateral thrust a redundant plurality of essentially similar electrically-powered and electronically-controlled thrust units mounted in a mechanically static or fixed fashion relative to one another in a substantially horizontal plane. The thrust units are situated in this planar array in aerodynamically approximate pairs, such that a complete failure of a single thrust unit would not substantially compromise the ability of the aircraft to maintain flight.

Abstract: Receipts may be received at a location that a customer normally uses to receive electronic correspondence, such as an e-mail address, an instant messaging address, etc. Among the items that are sent to that location, those items that contain a receipt may be identified. The identified receipts, or information extracted from such receipts, may be sent to a receipt store. An action, such as displaying the receipts to a customer, may be taken based on content stored in the receipt store. The information that is stored in a receipt store and/or that is displayed to customers may have an arbitrary level of detail.