objective headache is a frequent symptom in children and adolescents. migraine is one of the most common types of primary headache disorders in children that at times can be extremely disabling. many clinical features of migraine in children differ from that starting in adulthood. this review discusses the epidemiology,clinical features, management, and prognosis of migraine headache in childre...

This study investigated two major types of metadiscourse markers as used in typical sales contracts, written by English natives and Iranian non-natives. In so doing, 60 sales contracts were selected, 30 written by native English and 30 by Iranian non-natives. Based on Hyland and Tse’s taxonomy, the contracts were codified and classified in terms of the frequency and percentage of the interactiv...

Results of cognitive psychology research are analysed to explain why it is diicult for retrieval system users to bring to mind alternative search terms. A human memory model is modiied in such a way that it produces additional search terms instead of human associations. A small experiment shows that such a spreading activation network can nd alternative terms-with a performance similar to the n...

Research on the cognitive consequences of bilingualism suggests a bilingual advantage: early experience with more than one language predicts better inhibitory control of attention. The mechanisms responsible for this advantage, however, are not well understood. We ask whether depth and time-course of memory encoding may be responsible. We measured bilingual and monolingual adults’ memory for no...

Accurate identification of effective epidemic threshold is essential for understanding epidemic dynamics on complex networks. In this paper, we systematically study how the recovery rate affects the susceptible-infected-removed spreading dynamics on complex networks, where synchronous and asynchronous updating processes are taken into account. We derive the theoretical effective epidemic thresh...