Abstract: An e-wallet service allows a consumer to retrieve a list of merchants selling goods and services specified by the consumer, see reviews by other consumers who conducted transactions with the merchants on the retrieved list; select a merchant from the retrieved list and an account to pay for a staged transaction and a corresponding token for the staged transaction with the selected merchant, conduct the staged transaction with the merchant by the submission of the token to the merchant as form of payment; and use the token, after conducting the staged transaction with the selected merchant, to gain access to a social media portal and input the consumer's opinion about the selected merchant's performance of the staged transaction.

Abstract: A ceiling module perimeter seal establishes an air-tight seal between modules forming a ceiling structure. The seal includes a groove about the perimeter of modules and aligned relative to a corresponding groove of an adjoining module. Aligned grooves in adjacent ceiling modules establish an enclosure between modules and apertures fluidly couple the enclosure with gel sealant troughs of the ceiling structure. Gel sealant flowing in the troughs enters the enclosure and thereby establishes an air tight seal between adjoining ceiling modules.

Abstract: A ceiling structure for retaining air filter panels having a grid of interconnected rails. Each rail has a recessed channel for containing a light fixture so that the light fixture does not hang below the ceiling surface. The structure may also include hanger hooks attachable to the rails for suspending fixtures, wall panels, and pivoting wall headers to permit angled arrangements of wall panels. The light fixture attached within the channel is an extruded panel that snaps into the channel and which includes standard light tube connectors.

Abstract: A sheet metal construction system is provided with a support strut having an elongated channel. A piece of sheet metal having an aperture is positioned on the strut with the aperture positioned over a portion of the channel. A rivet is received within the aperture and extends into the channel where it grips the strut. In this way, the aperture in the sheet metal can be positioned anywhere along the length of the channel and there is much greater freedom in the placement of rivets. The strut is also provided with channels for receiving braces and hangers for suspending a finished sheet metal product, such as a plenum for a clean room.

Abstract: A ceiling structure for retaining air filter panels having a grid of interconnected rails. Each rail has a recessed channel for containing a light fixture so that the light fixture does not hang below the ceiling surface. The structure may also include hanger hooks attachable to the rails for suspending fixtures, wall panels, and pivoting wall headers to permit angled arrangements of wall panels. The light fixture attached within the channel is an extruded panel that snaps into the channel and which includes standard light tube connectors.

Abstract: A clean room ventilation system having a diffuser panel attached to a ceiling grid, with a filter element positioned well above the panel. The diffuser panel is perforated throughout its area with increased size and/or density of perforations in a peripheral region to provide increased airflow beneath the ceiling grid. The peripheral regions may further be angled to create a lateral airflow beneath the ceiling grid.

Abstract: A clean room diffuser panel for positioning below a ceiling grid mounted filter element. The diffuser panel is perforated throughout its area with increased size and density of perforations in a peripheral region to provide increased airflow beneath the ceiling grid. The peripheral regions are further angled or provided with directional vanes to create a lateral airflow beneath the ceiling grid.