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In this paper, it is shown that stacking dielectric sheets above planar self-complementary antenna elements can reduce the degrading effect of the ground plane and hence be used to design ultra-wideband antennas
Reference attribute grammars are a well-known language engineering technique for the implementation of semantic analyses. Reference attributes provide declarative means to extend abstract syntax trees to graphs and analyse such graphs; they are well-suited to deduce and reason about abstract syntax graphs. Efficient attribute re-evaluation in case of abstract syntax graph changes and a systematic
In this paper the question “Why software vendors focus on roles when they aim at developing the future enterprise resource planning (ERP) systems?” is discussed. At the moment there is increasing interest in developing ERP systems that support a person's different working roles in the organisation, which could be described as role-based ERPs. It could be asked whether this is a reaction to the wel
A committee has to address a complex question, the answer to which requires answering several sub-questions. Two different voting procedures can be used. On one procedure, the committee members vote on each sub-question and the voting results then are used as premises for the committee’s conclusion on the main issue. This premise-based procedure (pbp) can be contrasted with the conclusion-based pr
