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We propose an extension of logic programming where the user can specify, together with the initial query, the information he is interested in by means of a request. This allows one to extract a result from an incomplete computation, such as the prefix of an infinite derivation. The classical property of independence of the selection rule doesn’t hold anymore. It is shown that under mild conditi...

this paper reports the findings of a study designed to investigate english e-requestsof iranian efl postgraduate students (i.e., nonnative speakers of english) made totheir professors during their education at islamic azad university, najaf abadbranch, isfahan, iran, to find out types of politeness features employed in the students’e-mails and the extent to which these features might influence ...

A significant amount of contribution to pragmatics research comes from cross-cultural and developmental pragmatic studies with L2 learners in focus; however, despite broad interest in such analyses, the role of lecturers has been relatively ignored. As the lectures’ perceptions/opinions of L2 learners’ e-mail requests are important, L2 learners must become familiar with their lecturers’...

mobile computing systems are made up of different components among which mobile support stations (msss) play a key role. this paper proposes an efficient mss-based non-blocking coordinated checkpointing scheme for mobile computing environment. in the scheme suggested nearly all aspects of checkpointing and their related overheads are forwarded to the msss and as a result the workload of mobile ...