Abstract: A computer-implemented method for authenticating a user device via a device credential scoped to a common domain shared among a plurality of payment networks may be provided. The method may include receiving, by a server of a payment network, a first request redirected from a sub-domain assigned to the payment network to a domain name associated with the payment network, responsive to the first request, transmitting, to the user device, an authentication request comprising a challenge, a user identifier that identifies the user, and the common domain to which the device credential is scoped, receiving, from the user device, a response, accessing the device credential, the device credential having been stored by the payment network, validating the response based on the device credential, and causing, by the server, the user identifier and the device credential to be federated to the other ones of the plurality of payment networks based on the validating.

Abstract: A deformable or flexible diplexer element provides a common input to two separate bandpass filter arrays. The construction of the element and the associated diplexer filter containers are designed such that the average distance between each end of the element and its associated resonator can be easily adjusted to optimize coupling therebetween. With the individual adjustment and associated variable coupling, the filter responses are individually optimized to the appropriate frequencies.

Abstract: The flux rate of ultrafiltration membranes is markedly improved by the presence of inert, water-insoluble, impervious particles, particularly of metals and their alloys, distributed wholly within the membrane. The particles are particularly effective in the region adjacent the interface of the membrane with a support surface and may be distributed previously in the casting dope, or applied in a thin coating to the surface on which the membrane is subsequently prepared by casting from the dope. The membrane is in flat, tubular or filamentary form.