Abstract:
The present invention provides synthetic membranes which are suitable as a human skin substitute for the investigation of transdermal diffusion of candidate pharmaceutical and cosmetic compounds. The membranes according to the present invention exhibit human skin-like permeability properties with respect to the diffusion of a wide range of compounds having widely different physico-chemical properties.
Abstract:
A method and apparatus for providing a virtual output queue (VoQ) from a received set of data packets in a multi-service system. Each packet is divided into at least one partition, including a last partition that includes packet information, such as error status and packet length. The system receives the packet from a flow, parses the packet into partitions, including a first partition and the last partition, places each last partition into a linked list based on a time when the last partition was received, links the last partition to the first partition, and employs the linked list as the output queue. This system allows for rapid compilation and transmission of different sized packets, and obviates the need for the receiving processor to wait for the last partition to discard a bad packet.
Abstract:
A rate policing algorithm for packet flows is based on counters and threshold checking. The rate policing algorithm utilizes a state machine having four links: (1) compliant state to compliant state; (2) transition from compliant state to non-compliant state; (3) non-compliant state to non-compliant state; and (4) transition from non-compliant state to compliant state. Depending on the values obtained from the counters and utilizing the threshold values, it is determined whether a flow rate for packets is compliant or non-compliant.