Abstract: A lottery gaming system and method of operation thereof that provide a play of a draw lottery game and based on an amount of the award from the play of the draw lottery game an associated play of a secondary game. Based on the amount of the award, the play of the secondary game can be automatic, or optional, or not provided at all.

Abstract: A microfluidic device for modeling a tumor-immune microenvironment can include a multiwell plate defining a plurality of microenvironment units fluidically coupled with a plurality of wells. Each microenvironment unit of the plurality of microenvironment units can include one or more compartments. Each microenvironment unit can include a trapping feature positioned within the one or more compartments. The trapping feature can be defined by a portion of at least one of a sidewall or a floor of the one or more compartments. The trapping feature can restrict movement of a tissue sample introduced into the one or more compartments and to allow fluid to flow past the tissue sample. The microfluidic device can include a plurality of micropumps each coupled with a respective well and configured to control movement of a respective fluid sample through each respective well.

Abstract: A lottery gaming system and method providing a play of a multi-draw lottery game, that includes a selection of a player multi-draw symbol that is for a series of drawings of a draw lottery game, and a determination of any awards based on a determination of how many occurrences of the player multi-draw symbol appear in the plurality of drawn symbols for the plurality of drawings of the draw lottery game that are used for the multi-draw lottery game.

Abstract: A lottery gaming system and method providing a play of a multi-draw lottery game, that includes a selection of a player multi-draw sum that is for at least one drawings of at least one draw lottery game, and a determination of any awards based on the player multi-draw sum and a sum of the plurality of drawn numbers for the drawing(s) of the draw lottery game that is/are used for the multi-draw lottery game.

Abstract: Point-of-sale (POS) systems and methods that enable purchase of instant win lottery tickets through the POS systems, wherein each wager amount for each instant win lottery ticket and each award that can be won via each instant win lottery ticket are directly based on the purchase amount of a purchase of one or more goods and/or services by a purchaser on which the instant win lottery ticket is based.

Abstract: This disclosure provides systems and methods for seeding cell cultures in a microfluidic device. The systems and methods of this disclosure can enable flow of a cell solution from one side of a scaffold, such as a porous substrate or membrane, to the other side of the scaffold. Flow of the liquid can pass through the scaffold while the cells themselves do not, resulting in the cells driven to the surface of the scaffold for consequent attachment. A microfluidic device can include a microfluidic feature structured to create a seal between a cell seeding tool and an inlet to a microchannel of the microfluidic device. This can enable a pressure-driven flow to push fluid down the channel and through pores of the membrane. In contrast, traditional gravity fed seeding of cells may not create enough pressure to drive fluid through the pores of the scaffold.

Abstract: The systems and methods of the present disclosure provide highly deformable porous membrane culture systems and actuation methods for studying the effects of biomedical stretch on cultured tissue. A well plate can include a well having a first opening configured to receive an insert coupled to a deformable membrane. The well plate can include a gasket positioned within the well and configured to create a seal between the insert and the well when the insert is positioned in the well. The well plate can include a chamber defined beneath the well, the chamber configured to receive fluid media and to expose the fluid media to a surface of the deformable membrane when the insert is positioned in the well. The well plate can include an actuator configured to stretch the deformable membrane by a target amount of strain.

Abstract: A microfluidic device for modeling a tumor-immune microenvironment can include a multiwell plate defining a plurality of microenvironment units fluidically coupled with a plurality of wells. Each microenvironment unit of the plurality of microenvironment units can include one or more compartments. Each microenvironment unit can include a trapping feature positioned within the one or more compartments. The trapping feature can be defined by a portion of at least one of a sidewall or a floor of the one or more compartments. The trapping feature can restrict movement of a tissue sample introduced into the one or more compartments and to allow fluid to flow past the tissue sample. The microfluidic device can include a plurality of micropumps each coupled with a respective well and configured to control movement of a respective fluid sample through each respective well.

Abstract: This disclosure provides systems and methods for seeding cell cultures in a microfluidic device. The systems and methods of this disclosure can enable flow of a cell solution from one side of a scaffold, such as a porous substrate or membrane, to the other side of the scaffold. Flow of the liquid can pass through the scaffold while the cells themselves do not, resulting in the cells driven to the surface of the scaffold for consequent attachment. A microfluidic device can include a microfluidic feature structured to create a seal between a cell seeding tool and an inlet to a microchannel of the microfluidic device. This can enable a pressure-driven flow to push fluid down the channel and through pores of the membrane. In contrast, traditional gravity fed seeding of cells may not create enough pressure to drive fluid through the pores of the scaffold.

Abstract: An compact hydraulic manifold for transporting shear sensitive fluids is provided. A channel network can include a trunk and branch architecture coupled to a bifurcation architecture. Features such as tapered channel walls, curvatures and angles of channels, and zones of low fluid pressure can be used to reduce the size while maintaining wall shear rates within a narrow range. A hydraulic manifold can be coupled to a series of microfluidic layers to construct a compact microfluidic device.

Abstract: Microfluidic bioreactor devices may feature intercommunicating microchannels defined in two polymer layers separated by a membrane. A geometric parameter associated with the microchannels in one layer may vary along a length of those channels.

Abstract: The invention is a method for fabricating a cell culture surface substrate, comprising the steps of a) forming a cell culture surface having a mechanical topography, b) forming a synthetic chemical pattern using a chemical pattern template, and c) combining the cell culture surface having a mechanical topography and the synthetic chemical pattern. Mechanical topography is defined as a pattern of mechanical structures with regular and specifically designed features. The synthetic chemical pattern is defined as a group of features of specific chemistry different from the chemistry of their surroundings that have regular and specifically designed features.