Abstract: Various aspects of the subject technology relate to systems, methods, and machine-readable media for proposing blocks to be added to a blockchain. Various aspects may include performing adding block headers to a first blockchain, wherein the block headers reference a set of validators. Aspects may also include adding a temporal parameter to each block header. Aspects may also include determining, based on a block signature from a block header and from the set of validators, a proposer of candidate blocks for addition to the blockchain. Aspects may also include sampling, based on a temporal parameter, a subset of validators of the set of validators. Aspects may include increasing the proposer to a plurality of proposers from the subset of validators by an incremental quantity based on a comparison of the temporal parameter to a threshold.

Abstract: Various aspects of the subject technology relate to systems, methods, and machine-readable media for providing an application trusted execution environment. Various aspects may include performing attestation of each application enclave of a plurality of application enclaves for a plurality of applications. Aspects may also include receiving a request from a client. Aspects may also include selecting a load balancer to forward the request to the application enclaves. Aspects may also include determining a sensitivity level of the request that is associated with a secured environment parameter. Aspects may include routing, by an enclave server of the load balancer, the request to an application enclave according to the sensitivity level for execution of an application of the plurality of applications in the application trusted execution environment.

Abstract: A hand control device for swimmers is presented. The device has a main body with two holes in a side-by-side configuration. The first one of the two holes is configured for a third digit of a person's hand while the second one of the two holes is configured for a fourth digit of the person's hand. The inside surface of each hole comprises a plurality of grooves that run depthwise thereby providing wet traction while impacting minimum direct pressure on the nerves, vessels and tendons. The outside surface of the device may also include ridges to provide pass through for water.

Abstract: A hand control device for swimmers is presented. The device has a main body with two holes in a side-by-side configuration. The first one of the two holes is configured for a third digit of a person's hand while the second one of the two holes is configured for a fourth digit of the person's hand. The inside surface of each hole comprises a plurality of grooves that run depthwise thereby providing wet traction while impacting minimum direct pressure on the nerves, vessels and tendons. The outside surface of the device may also include ridges to provide pass through for water.

Abstract: A power distribution system that distributes power to electrical loads includes a switchgear apparatus that selectively routes power from one of two or more feeds to downstream portions of the system based upon commands received from a separate external switchgear controller device that receives data from various portions of the power distribution system. The switchgear controller device can operate in one or more separate operating modes, where commands to the switchgear apparatus are generated based upon user inputs or determinations made by an internal switchgear control module based at least in part upon the selected operating mode of the switchgear controller device. The operating mode can be set based upon user interaction with an operating mode interface. The switchgear control module may generate switchgear operation commands based at least in part upon data received from the switchgear apparatus and various portions of the power distribution system.

Abstract: A switchgear controller device that generates commands to a switchgear apparatus that selectively routes power from one of two or more feeds to an electrical load of a power distribution system based upon the commands includes a user interface that displays graphical representations of various portions of the power distribution system. The switchgear controller device can receive data from components included in respective upstream portions and downstream portions of the power distribution system and generates graphical representations of present configurations of the components based at least in part upon the received data. Graphical representations of components included in the downstream portion of the system may be non-interactive, and graphical representations of components included in the upstream portion may be interactive based at least in part upon the present operating mode of the switchgear controller device.

Abstract: A roofing ladder with a modular angularly adjustable platform facilitates roofing work by providing a platform assembly which can be adjusted angularly to provide a desired slope for sitting or standing on or for storing tools or supplies. A beam provides structural support. A roof anchor hook connected to the beam contacts the opposing roofing surface to hold the ladder in place. A wheel assembly allows a user to easily mount the ladder on a roof. A plurality of step rods laterally connected to the beam provides steps for climbing the ladder as well as attachment locations for the platform assembly. A plurality of beam lifters provides a means to lift the beam off the roof surface for performing work on the roof surface underneath the beam. An extension slot allows the ladder to be extended for longer roofs or more easily manipulated into place using an extension pole.

Abstract: A roofing ladder with a modular angularly adjustable platform facilitates roofing work by providing a platform assembly which can be adjusted angularly to provide a desired slope for sitting or standing on or for storing tools or supplies. A beam provides structural support. A roof anchor hook connected to the beam contacts the opposing roofing surface to hold the ladder in place. A wheel assembly allows a user to easily mount the ladder on a roof. A plurality of step rods laterally connected to the beam provides steps for climbing the ladder as well as attachment locations for the platform assembly. A plurality of beam lifters provides a means to lift the beam off the roof surface for performing work on the roof surface underneath the beam. An extension slot allows the ladder to be extended for longer roofs or more easily manipulated into place using an extension pole.

Abstract: A dual chambered bubbler vessel for use with solid organometallic source material for chemical vapor phase deposition systems, and a method for transporting a carrier gas saturated with source material for delivery into such systems. The bubbler vessel is designed so that carrier gas enters through an inlet in the top thereof into an inlet chamber and after it has been saturated with the organometallic vapors exits through a first porous frit located in the floor of the inlet chamber into an outlet chamber and is withdrawn from the bubbler after passing through a second porous frit element located at the outlet of the bubbler.

Abstract: The invention is a method of building structures from tapered logs which have been manufactured in an industrial setting. The logs are stacked crosswise by fitting a notch in a first log, where the notch has a standardized size and shape, over an end of a second log, where the end of the second log has a predetermined size and shape, allowing it to fit into the notch in the first log. Structures built using this method strongly handcrafted structures built from natural logs.