Abstract: A method for maintaining login service parameters includes a step of allocating space for and storing a login service parameter portion of a logged in port. A login service parameter of a logged in port is then compared with stored login service parameter structures. If the login service parameter of the logged in port, except for a login service parameter portion thereof, is identical with one of the stored login service parameters, a step of adding a first pointer to that stored login service parameters structure into the stored login service parameter portion structure is carried out. A new login service parameter portion structure is allocated and the process repeated, thereby creating a linked list of login service parameter portion structures, each login service parameter portion structure pointing to both the stored login service parameter structure and to a next login service parameter portion structure.

Abstract: A method for dynamic reconfiguration of a message-passing interface from a Push model to a Pull model is disclosed. In the Push model, a host computer device moves data stored in a host local memory to an I/O peripheral shared memory, whereas in the Pull model, the I/O peripheral moves data from the host's shared memory to a local memory of the I/O peripheral. To dynamically reconfigure the message passing interface from the Push to the Pull model, the hosts waits for the I/O peripheral to cycle through power-on/reset, locates the I/O peripheral's inbound and outbound queues in memory, directs the I/O peripheral to clear its outbound queue of messages from previous inbound messages and initializes the allocated message frames as free messages. The host then posts a message to the I/O peripheral inbound queue instructing the I/O peripheral to initialize in the Pull model. The I/O peripheral then posts any messages currently being processed to the I/O peripheral outbound queue.

Abstract: A beam electronically steers, in real time, a multielement sensor array at radio frequencies. A sensor array is configured in one embodiment with orthogonal loops and orthogonal dipole elements. Each loop and dipole combination generates a polarized output signal which is routed, via a connection matrix, to an equal number of signal splitters. The resulting modal patterns are then routed to networks having quad hybrids and digitally user-controllable vector modulators. The signals outputted from the quad hybrids and the vector modulators of each of the networks are inputted to separate combiners. The signals outputted from the separate combiners of the networks are then recombined in combiners. The signals outputted from these combiners define the azimuth around the Z-axis, the elevation around the Y-axis, and the elevation around the X-axis, respectively.