Abstract: A rotary cutting blade includes a cutting edge, a lift wing that arcs or angles upwardly from the cutting edge and defines a leading end from which the cutting edge extends and a trailing end, and a wing tail that extends from the trailing end of the lift wing in a direction away from the cutting edge.

Abstract: The present disclosure provides systems, methods, and apparatuses for improved magnetic separation of a biological population. A system for magnetic separation and collection of a target biological population from a biological sample comprises a cell engineering cassette, and a fluidic pathway disposed within the cell engineering cassette. The fluidic pathway has entrapment features disposed along a flow path of the fluidic pathway. An array of magnets is disposed adjacent to the fluidic pathway and the cell engineering cassette such that the array of magnets can be translatable toward and away from the fluidic pathway to apply a magnetic field to the biological population for the separation of a first subpopulation from a second subpopulation.

Abstract: Outdoor power equipment includes a frame including a handle, a prime mover mounted to the frame, a transmission coupling the prime mover to a wheel, and a user interface coupled to the transmission and including a static link rigidly coupled to the handle, a forward link coupled to a forward lever and to the static link, a reverse link coupled to a reverse lever and to the static link, and a joining link coupled between the forward link and the reverse link. The user interface is actuatable between a forward configuration and a reverse configuration.

Abstract: Outdoor power equipment includes a frame including a handle, a prime mover mounted to the frame, a transmission coupling the prime mover to a wheel, and a user interface coupled to the transmission and including a static link rigidly coupled to the handle, a forward link coupled to a forward lever and to the static link, a reverse link coupled to a reverse lever and to the static link, and a joining link coupled between the forward link and the reverse link. The user interface is actuatable between a forward configuration and a reverse configuration.

Abstract: The present disclosure provides cell culture chambers for use in automated cell engineering systems, and in particular, cell culture chambers that provide increased cell yield. A cell culture chamber may include a first body forming a first portion of the cell culture chamber. A cell culture chamber may include a second body forming a second portion of the cell culture chamber, the first body and the second body configured to couple together, forming an enclosed volume, wherein a first non-porous, gas-permeable material is disposed on the first body; and wherein the first non-porous, gas-permeable material and the first body are formed together. A second non-porous, gas-permeable material may be disposed on the second body, and the second non-porous, gas-permeable material and the second body may be formed together. The cell culture chamber may further include at least one bubble trap integrally formed with the first body and/or the second body.

Abstract: A walk behind lawn mower including a frame including a handle, an engine mounted to the frame, a transmission coupling the engine to a plurality of wheels, and a user interface coupled to the transmission and including a static link rigidly coupled to the handle, a forward link coupled to a forward lever and to the static link, a reverse link coupled to a reverse lever and to the static link, and a joining link coupled between the forward link and the reverse link. The user interface is actuatable between a forward configuration and a reverse configuration using a single hand.

Abstract: Systems and apparatuses include a walk behind lawn mower including a frame including a handle, an engine mounted to the frame, a transmission coupling the engine to a plurality of wheels, and a user interface coupled to the transmission and including a static link rigidly coupled to the handle, a forward link coupled to a forward lever and to the static link, a reverse link coupled to a reverse lever and to the static link, and a joining link coupled between the forward link and the reverse link. The user interface is actuatable between a forward configuration and a reverse configuration using a single hand.

Abstract: An activity management system is configured to allow users to access multimedia content where the multimedia content is divided in to segments. While a user is viewing or interacting with the multimedia content, the user can submit one or more activities (e.g., comments, questions, replies, or reactions) using a graphical user interface. The system is operable to electronically link the activity provided by the user with the particular segment of multimedia content in which the activity was captured by the system. The system is also configured to determine a sentiment score for particular multimedia content, one or more segments of the particular multimedia content, a user, a group of users, or an organization. The sentiment score may be related to a general mood (e.g., confused, happy, bored) of the user when viewing one or more segments of particular multimedia content.

Abstract: An activity management system is configured to allow users to access multimedia content where the multimedia content is divided in to segments. While a user is viewing or interacting with the multimedia content, the user can submit one or more activities (e.g., comments, questions, replies, or reactions) using a graphical user interface. The system is operable to electronically link the activity provided by the user with the particular segment of multimedia content in which the activity was captured by the system. The system is also configured to determine a sentiment score for particular multimedia content, one or more segments of the particular multimedia content, a user, a group of users, or an organization. The sentiment score may be related to a general mood (e.g., confused, happy, bored) of the user when viewing one or more segments of particular multimedia content.

Abstract: An adjustable transition duct support system for a transition duct that channels hot gases from a combustor exit to a gas turbine inlet of a turbine engine. The adjustable transition duct support system includes an adjustable forward transition flexible support assembly in contact with a transition duct body, whereby the forward transition flexible support assembly may be formed from a base extending toward the transition duct body and first and second side support arms extending from the base to the transition duct body. The first and second side support arms may be formed from a plurality of flex plates spaced from each other with spacers that provide rigidity in circumferential and radial directions and flexibility in an axial direction. The number of flex plates used may be varied to accommodate different turbine engines. The adjustable transition duct support system may have natural frequencies for circumferential and radial modes above two engine orders.

Abstract: An adjustable transition duct support system for a transition duct that channels hot gases from a combustor exit to a gas turbine inlet of a turbine engine. The adjustable transition duct support system includes an adjustable forward transition flexible support assembly in contact with a transition duct body, whereby the forward transition flexible support assembly may be formed from a base extending toward the transition duct body and first and second side support arms extending from the base to the transition duct body. The first and second side support arms may be formed from a plurality of flex plates spaced from each other with spacers that provide rigidity in circumferential and radial directions and flexibility in an axial direction. The number of flex plates used may be varied to accommodate different turbine engines. The adjustable transition duct support system may have natural frequencies for circumferential and radial modes above two engine orders.

Abstract: A gas-turbine burner having a plurality of main swirl generators which each have an inlet flow opening formed by the main swirl generator edge is provided. In order to achieve a uniform flow of combustion air through the main swirl generator, the gas-turbine burner has an inlet-flow guide means with a flow guide surface which runs from one of the inlet-flow openings to an adjacent inlet-flow opening, to which the main swirl generator edges which form the inlet-flow openings are connected, and the flow guide surface widens from there radially upwards. The main swirl generators are central-symmetrically arranged around a pilot burner and the flow guide surface runs radially outside the main swirl generators.

Abstract: A flange connection for an exhaust section of a gas turbine engine. The flange connection includes a stub flange attached to an exhaust manifold. The stub flange has a first axial face for engagement with the axial face of a cylinder flange extending radially from an exhaust cylinder. A plate structure attached to the cylinder flange is configured to provide axial retention of the stub flange to the axial face of the cylinder flange. The plate structure includes a resilient beam portion extending radially inwardly and engaging a second axial face of the stub flange. The stub flange is retained between the cylinder flange and the beam portion of the plate structure in an interference fit to provide three degrees of freedom of the stub flange relative to the exhaust cylinder.

Abstract: A gas-turbine burner having a plurality of main swirl generators which each have an inlet flow opening formed by the main swirl generator edge is provided. In order to achieve a uniform flow of combustion air through the main swirl generator, the gas-turbine burner has an inlet-flow guide means with a flow guide surface which runs from one of the inlet-flow openings to an adjacent inlet-flow opening, to which the main swirl generator edges which form the inlet-flow openings are connected, and the flow guide surface widens from there radially upwards. The main swirl generators are central-symmetrically arranged around a pilot burner and the flow guide surface runs radially outside the main swirl generators.

Abstract: In some embodiments, the present invention provides a mower including a frame having a front portion and a rear portion, at least one front wheel coupled to the front portion of the frame, and two drive wheels on substantially opposite sides of the rear portion of the frame. Each drive wheel is coupled to the frame by a first link pivotably coupled at one end to the front portion of the frame and at an opposite end to the drive wheel, and a second link pivotably coupled at one end to the rear portion of the frame and at an opposite end to the drive wheel. The mower also includes at least one spring positioned to bias the drive wheels in a downward direction. Each of the drive wheels are movable upward and downward relative to the frame.

Abstract: A gas-turbine burner having a plurality of main swirl generators, each having an inlet flow opening formed by the main swirl generator edge, is provided. In order to achieve a uniform flow of combustion air through the main swirl generator, the gas-turbine burner has an inlet-flow guide means with a flow guide surface which runs from one of the inlet-flow openings to an adjacent inlet-flow opening, to which the main swirl generator edges which form the inlet-flow openings are connected, and the flow guide surface widens from there radially upwards. The main swirl generators are central-symmetrically arranged around a pilot burner and the flow guide surface runs radially outside the main swirl generators.

Abstract: Embodiments of software-supervised pairing processes are provided. The processes enable a user to pair a mouse and keyboard with a Bluetooth transceiver without having to use a second mouse and keyboard. At least two separate processes are provided, including a long transition for initial pairing or re-pairing and a short transition for re-establishing a connection after devices have already been paired.

Abstract: A flange connection for an exhaust section of a gas turbine engine. The flange connection includes a stub flange attached to an exhaust manifold. The stub flange has a first axial face for engagement with the axial face of a cylinder flange extending radially from an exhaust cylinder. A plate structure attached to the cylinder flange is configured to provide axial retention of the stub flange to the axial face of the cylinder flange. The plate structure includes a resilient beam portion extending radially inwardly and engaging a second axial face of the stub flange. The stub flange is retained between the cylinder flange and the beam portion of the plate structure in an interference fit to provide three degrees of freedom of the stub flange relative to the exhaust cylinder.

Abstract: In some embodiments, the present invention provides a mower including a frame having a front portion and a rear portion, at least one front wheel coupled to the front portion of the frame, and two drive wheels on substantially opposite sides of the rear portion of the frame. Each drive wheel is coupled to the frame by a first link pivotably coupled at one end to the front portion of the frame and at an opposite end to the drive wheel, and a second link pivotably coupled at one end to the rear portion of the frame and at an opposite end to the drive wheel. The mower also includes at least one spring positioned to bias the drive wheels in a downward direction. Each of the drive wheels are movable upward and downward relative to the frame.

Abstract: A system and method for reducing power consumption of a wireless input device is disclosed. The input device may convert between a high power state and a low power state. In the high power state, a transmitter and light sources are activated, whereas both the transmitter and the light sources are deactivated in the low power state. Following a period of inactivity in which neither a key sensor for activatable keys nor a presence sensor for the user transmit input, the input device may convert from the high power state to the low power state to conserve energy. When the presence sensor detects the presence of the user, however, the input converts to the high power state wherein the transmitter and the light sources are activated.