Reactive programming paradigm successfully overcomes the limitations of observer pattern which has traditionally been used for developing event-driven distributed systems. Due to its declarative style, compositionality and automatic management of dependencies, reactive programming offers a promising new way for building complex distributed data-flow systems. This article outlines some open chal...

of distributed systems, design processes associated with the distribution of processing, and the conditions under which benefits accrue. The essay concentrates on some of the major benefits expected from distributed systems so as to provide a context in which to judge particular designs and their benejits. Among the judgment-informing considerations are the following: centralized management, hi...

In this paper, we propose speculative distributed transaction processing (SDTP) strategy, in which, a transaction releases the locks on the data objects immediately after the completion of its execution and starts commit processing. By accessing both original values and updated values immediately after the transaction's execution, the waiting transaction speculatively carries out alternative ex...

The Object-Based Media Group at the MIT Media Laboratory is developing robust, self-organizing programming models for dense ensembles of ultra-miniaturized computing nodes which are deployed by the thousands in bulk fashion, e.g. embedded into building materials. While such systems potentially offer almost unlimited computation for multimedia purposes, the individual devices contain tiny amount...

friction stir processing was applied for fabricating an aluminum alloy based hybrid nano composite reinforced with nano sized al2o3 and micro sized graphite particles. a mixture of al2o3 and graphite particles was packed into a groove with 1 mm width and 4.5 mm depth, which had been cut in 5083 aluminum plate of 10 mm thick. packed groove was subjected to friction stir processing in order to im...