The design of an interface unit is described, in which RS232 serial data is converted to latched parallel data on 22 independent lines. The data direction of each line is programmable through the serial port. Two picocontrollers are employed in a parallel processing mode to give the required number of I/O pins, and data on the shared serial line is coded to separate data streams to the individu...

Computer-mediated communication (CMC) has been adopted in most e-learning settings. However, few research studies have considered the effect of different CMC. This study examined how and why synchronous communication affected participation in online discussions. Two online classes that participated in two asynchronous and two synchronous online discussions were examined. Actual and perceived me...

We study the problem of secure communication tolerating generalized mixed adversaries across an underlying completely asynchronous incomplete network. We explore the interplay between the minimal network connectivity required and the degree of security attainable, and completely characterize the network requirements for attaining perfect and unconditional (with negligible error) security. We al...

This paper described the principle, application and implementation of serial communication between PC and a Digital Signal Processor (DSP). The TMS320F28031 which is a type of DSPs made by Texas Instruments (TI) is used in this implementation. This DSP processor has serial communication interface (SCI) module for serial communication. The SCI is a two−wire asynchronous serial port, commonly kno...

This paper describes an approach for handling intermittent connectivity between mobile clients and network-resident applications, which we call zippering. When the client connects with the application, communication between the client and the application is synchronous. When the client intermittently connects with the application, communication becomes asynchronous. The DIANA (Device-Independen...