Abstract: An authentication model dynamically adjusts authentication factors required for access to a remote resource based on changes to a risk score for a user, a device, or some combination of these. For example, the authentication model may conditionally specify the number and type of authentication factors required by a user/device pair, and may dynamically alter authentication requirements based on changes to a current risk assessment for the user/device while the remote resource is in use.

Abstract: A seal includes an annular seal body formed of an elastomeric material and has opposing first and second circumferential surfaces and a sealing projection extending radially from the first circumferential surface. The projection has a frustoconical primary sealing surface with first and second axial ends and an axial length between the first and second ends. The projection is sealingly engageable with the inner surface of the outer member when the seal body is coupled with the inner member, such that substantially the entire axial length of the primary sealing surface is disposed against the inner surface of the outer member. Alternatively, the projection is sealingly engageable with the outer surface of the inner member when the seal body is coupled with the outer member, such that substantially the entire axial length of the primary sealing surface is disposed against the outer surface of the inner member.

Abstract: A seal assembly for sealing an annular space between a shaft and a housing includes an annular case coupleable with the housing or the shaft and an annular seal member having a sealing surface centered about a centerline. In certain constructions, a coupler is configured to connect the seal member with the case or to connect the case with the housing such that the seal member is positioned with the sealing surface centerline intersecting or skew with respect to a central axis when the seal assembly is installed about the shaft. In other constructions, the seal member has an angled end providing the angled sealing surface. Thereby, the centerline of the sealing surface defines an angle to the central axis having a value of at least one degree, and the sealing surface engages the shaft outer surface to define an elliptical sealing interface extending circumferentially about the central axis.

Abstract: An algae separation system can comprise a tank comprising an algae separation chamber. The system can comprise a first inlet to supply algae-containing water to a mixing region of the algae separation chamber. The system can comprise a second inlet to supply gas-containing water comprising dissolved gas to the mixing region of the algae separation chamber. The system can comprise a bubble generator in fluid communication with the second inlet, the bubble generator configured to generate a plurality of bubbles from the gas-containing water and to supply the plurality of bubbles to the mixing region to mix with the algae-containing water.

Abstract: A seal assembly for sealing an annular space between a shaft and a housing includes an annular case coupleable with the housing or the shaft and an annular seal member having a sealing surface centered about a centerline. In certain constructions, a coupler is configured to connect the seal member with the case or to connect the case with the housing such that the seal member is positioned with the sealing surface centerline intersecting or skew with respect to a central axis when the seal assembly is installed about the shaft. In other constructions, the seal member has an angled end providing the angled sealing surface. Thereby, the centerline of the sealing surface defines an angle to the central axis having a value of at least one degree, and the sealing surface engages the shaft outer surface to define an elliptical sealing interface extending circumferentially about the central axis.

Abstract: A seal includes an annular seal body formed of an elastomeric material and has opposing first and second circumferential surfaces and a sealing projection extending radially from the first circumferential surface. The projection has a frustoconical primary sealing surface with first and second axial ends and an axial length between the first and second ends. The projection is sealingly engageable with the inner surface of the outer member when the seal body is coupled with the inner member, such that substantially the entire axial length of the primary sealing surface is disposed against the inner surface of the outer member. Alternatively, the projection is sealingly engageable with the outer surface of the inner member when the seal body is coupled with the outer member, such that substantially the entire axial length of the primary sealing surface is disposed against the outer surface of the inner member.

Abstract: An annular seal for a low friction bonded piston seal is provided. The annular seal having a central axis and including an annular seal body symmetrically positioned about the central axis. The annular seal is integrally molded to the body and provides a lower seal lip body, and a top seal lip. The top seal lip including a first radial lip thickness T1 and a second radial lip thickness T2. A ratio between second radial lip thickness T2 to first radial lip thickness T1 is less than 1.00. The annular seal includes a radial lip height H, and a radial lip overall pressure received thickness T3. A ratio of radial lip height H to second radial lip thickness T2 is greater than or equal to 0.65. The radial lip overall pressure received thickness T3 is less than or equal to 0.8 mm. The first radial lip thickness T1 is less than or equal to 0.7 mm.

Abstract: An annular seal for a low friction bonded piston seal is provided. The annular seal having a central axis and including an annular seal body symmetrically positioned about the central axis. The annular seal is integrally molded to the body and provides a lower seal lip body, and a top seal lip. The top seal lip including a first radial lip thickness T1 and a second radial lip thickness T2. A ratio between second radial lip thickness T2 to first radial lip thickness T1 is less than 1.00. The annular seal includes a radial lip height H, and a radial lip overall pressure received thickness T3. A ratio of radial lip height H to second radial lip thickness T2 is greater than or equal to 0.65. The radial lip overall pressure received thickness T3 is less than or equal to 0.8 mm. The first radial lip thickness T1 is less than or equal to 0.

Abstract: An improved hydraulic dredging apparatus for removing a sediment layer from an underlying substrate lying below a water surface includes a receptacle having an open-front portion through which is sediment is collected, means for attaching the dredging apparatus to the submersible end of a boom that extends from a surface vehicle, a hydraulic pump for pumping a sediment and water slurry to the water's surface.

Abstract: An improved hydraulic dredging apparatus for removing a sediment layer from an underlying substrate lying below a water surface includes a receptacle having an open-front portion through which is sediment is collected, means for attaching the dredging apparatus to the submersible end of a boom that extends from a surface vehicle, a hydraulic pump for pumping a sediment and water slurry to the water's surface.