Abstract: A drain cleaning machine for moving a snake in a drain. The drain cleaning machine includes a housing, a motor configured to move the snake in the drain, a switch trigger configured to move between a first switch trigger position and a second switch trigger position, an actuating lever moveable between a deactivated position and an activated position, and a switch linkage configured to be moved by the actuating lever between a first switch linkage position and a second switch linkage position. In response to the actuating lever moving from the deactivated position to the activated position, the switch linkage is moved from the first switch linkage position to the second switch linkage position, and in response to the actuating lever moving from the activated position to the deactivated position, the switch linkage is moved from the second switch linkage position to the first switch linkage position.

Abstract: A concrete trowel including: a frame; a handle assembly extending from the frame for controlling the concrete trowel; a plurality of rotors coupled to the frame, each of the plurality of rotors including a plurality of blades; a drive assembly mounted to the frame including a plurality of motors, each mounted to a respective rotor of the plurality of rotors, operable to provide torque to the plurality of rotors to rotate the plurality of rotors about respective rotational axes; and a steering control system mounted on the handle assembly configured to selectively adjust the torque provided to one or more of the plurality of rotors and/or a rotational direction of one or more of plurality of rotors.

Abstract: A drain cleaning machine includes a housing, a snake inlet tube supported by the housing, the snake inlet tube defining a snake axis; a snake outlet tube supported by the housing, the snake outlet tube coaxial with the snake inlet tube; a motor switchable between a deactivated state and an activated state in which the motor is configured to rotate one of the snake inlet tube or snake outlet tube about the snake axis; an actuating lever moveable between a use position and a carry position, in which the actuating lever may be used to transport the drain cleaning machine; and a locking member coupled to the housing, the locking member moveable between an unlocked position, in which the actuating lever is allowed to move between the use and carry position, and a locked position, in which the actuating lever is maintained in the carry position.

Abstract: Provided are a computer program product, system, and method to determine whether a holding of a lock to the resource by a first task satisfies a condition and whether the lock is swappable. The lock is released from the first task and granted to a second task waiting in a queue for the lock in response to determining that the holding of the lock satisfies the condition and that the lock is swappable. The first task is indicated in the queue waiting for the lock in response to granting the lock to the second task.

Abstract: A concrete trowel includes a frame, a drive assembly including a motor mounted on the frame and a drive hub configured to receive torque from the motor, a handle assembly extending from the frame for controlling the concrete trowel, a rotor including a plurality of blades, the rotor rotatably coupled to the drive assembly for rotating about a rotational axis, and a steering control system mounted on the handle assembly to selectively adjust an orientation of the drive hub relative to a work surface in a plurality of different directions to adjust a pressure applied by the blades against the work surface.

Abstract: The present disclosure provides gene therapy that targets complement pathways for treating dry age-related macular degeneration.

Abstract: Methods for making an aqueous polyaluminum chloride (PAC) are disclosed that include adding an amount of a chloride-containing aluminum compound simultaneously with an amount of a base to a reaction vessel, mixing the two solutions in the reaction vessel, to produce a mixture, until a pH between 4.5 and 10 of the mixture is attained, maintaining the pH of the mixture between 4.5 and 10 during the mixing to produce an aluminum hydroxide precipitate dispersed in a liquid, allowing the aluminum hydroxide precipitate in the mixture to settle and creating a supernatant liquid, removing an amount of the supernatant liquid from the mixture to form a slurry, and adding a low- to mid-basicity polyaluminum chloride solution, an aluminum chloride solution, and/or a hydrochloric acid solution to the slurry to dissolve the aluminum hydroxide precipitate to form the aqueous polyaluminum chloride.

Abstract: A drain cleaning machine includes a snake inlet tube, a clamping mechanism having a first support member and a second support member. The second support member is movable between a first position in which a first distance is defined between the first support member and the second support member, and a second position in which a second distance is defined between the first support member and the second support member. The clamping mechanism also includes a plurality of collets supported by the first and second support members. The drain cleaning machine also includes a motor switchable between a deactivated state and an activated state in which the motor is configured to rotate the clamping mechanism and an actuating lever moveable between a deactivated position, in which the second support member is in the first position, and an activated position, in which the second support member is in the second position.

Abstract: A method for deployment of machine-learning based operators within a query is described. For this embodiment, a sequence of operators associated with a query is identified, which includes at least a first operator and at least a second operator. The second operator is configured to perform operations, in accordance with a machine learning (ML) component, on data received as input from execution of the first operator. Schemas associated with the machine learning component is retrieved along with schemas associated with other operators within the sequence. Compatibility between at least an output schema associated with the first operator and an input schema associated with the second operator associated with the ML component is determined. Thereafter, a portion of the sequence of operators including at least the second operator and another operator of the sequence of operators successive to the second operator may be stored within a data store for subsequent use.

Abstract: Disclosed herein is a method that supports queries deploying operators based on multiple programming languages at least through determining schema compatibility between neighboring operators within a query. Upon receipt of a query, a sequence of operators of the query is identified, where the sequence of operators includes at least two neighboring operators including a first operator and a second operator representing a machine learning model. By determining schema compatibility between at least the first and second operators, the method either alerts a user to schema incompatibility before attempting to execute the query or determine that the schemas are compatible such that the query may be executed without the occurrence of errors due to schema incompatibility between neighboring operators. Advantageously, the method enables the integration of a machine learning model into the query while still ensuring schema compatibility.

Abstract: Methods for making a sulfated polyaluminum chloride (PACS) flocculating agent solution, which may be aqueous, include neutralizing an aqueous sulfate-containing aluminum compound with an aqueous base to produce an aluminum hydroxide precipitate dispersed in a liquid, settling the aluminum hydroxide precipitate to create a supernatant liquid, removing an amount of the supernatant liquid to leave a remainder that contributes a selected concentration of sulfate to the PACS, and bringing the precipitate back into solution thereby forming the PACS flocculating agent.

Abstract: A suppressor for reducing muzzle flash during firing of a firearm. The suppressor includes an auto purge channel configured to direct gas to a distal end of the suppressor adjacent an exit point of a projectile. In one example, the auto purge channel enables gas to saturate an area of the suppressor in front of the projectile. For example, the auto purge channel directs gas to the distal end of the suppressor at a speed that is greater than a speed of the projectile. In another embodiment, the projectile travels through combustion gasses transferred by the auto purge channel to reduce muzzle flash. In yet another example, the auto purge channel runs parallel to a central bore of the suppressor.

Abstract: Provided are a computer program product, system, and method for a data set connection manager having a plurality of data sets to represent one data set. A request is processed to open a connection to a data set having members, wherein the connection is used to perform read and write requests to the members in the data set. In response to establishing the connection, establishing for the connection a primary data set having all the members; a secondary data set to which updated members in the primary data set are written; and a pending delete data set to pending delete members comprising members that are updated.

Abstract: A feed mechanism for use with a drain cleaner includes a frame configured to be coupled to the drain cleaner. The frame includes a cable passage defining a cable axis. The feed mechanism includes a plurality of rollers including a translatable roller, the translatable roller moveable between an engaged position and a disengaged position. The feed mechanism includes an activator supported by the frame and movable between an active position and an inactive position. The feed mechanism includes a plunger coupled for movement with the activator and the translatable roller to move the translatable roller in response to movement of the activator, and a friction plate arranged about the plunger. The friction plate is operable to frictionally engage the plunger while the activator is in the active position to inhibit the activator from moving to the inactive position.

Abstract: Provided are a computer program product, system, and method for recovering from a pending uncompleted reorganization of a data set managing data sets in a storage. In response an initiation of an operation to access a data set, an operation is initiated to complete a pending uncompleted reorganization of the data set in response to the data set being in a pending uncompleted reorganization state and no other process currently accessing the data set.

Abstract: Systems and methods for controlling a power trowel. A power trowel includes a handle including a speed control input, a housing, a shaft connecting the handle and the housing, a safety mechanism located on the shaft, a blade assembly positioned below the housing, a motor located within the motor housing and coupled to the blade assembly, and a controller. The safety mechanism includes a safety lever configured to move in response to an uncontrolled condition of the power trowel. The controller is connected to the motor and the safety mechanism. The controller is configured to drive, in response to actuation of the speed control input, the motor, detect a movement of the safety lever from a first position to a second position, and perform, in response to the movement of the safety lever to the second position, a safety operation.

Abstract: A method, system, and computer program product are disclosed for implementing enhanced expertise and evidence based decision making in knowledge-based applications. Expertise and evidence based decision making operations include differentiating between an average user and an expert user, and using real time feedback from expert users to update and embed expert knowledge into a predefined baseline command sequence model for a given task or problem.

Abstract: Machine learning-based part selection in relation to one or more end use environmental conditions is provided. The process includes training a machine learning model to facilitate evaluation of a part for use in a product based on an environmental condition. Further, the process includes receiving measurement data for the part, and establishing a score for the part by comparing the measurement data for the part to a specification for the part. In addition, the method includes using the machine learning model and the established score for the part in determining whether to use the part in the product based on the environmental condition.

Abstract: A computer-implemented method is disclosed that includes operations of parsing a query comprised of a sequence of operators to detect each operator of the sequence of operators, where the sequence of operators includes a machine learning (ML) operator representing a trained ML model. Additionally, a schema of the ML operator is determined through metadata. A filter or a projection is generated based on the schema of the ML operator, where the filter or projection is configured to reduce an amount of data retrieved upon application of the filter of the projection to an operator of the sequence of operators comprising the query. The schema of the ML operator indicates a schema of input data to be provided to the ML operator and a schema of output data to be provided by the ML operator following processing.