the extensive research done on the interrelationship between different social factors such as social class, gender and age and different linguistic variables has shown that these factors have important effects on the way language is used. among these factors a special importance can be placed on age due to the role it plays in revealing different patterns of language use, such as the age-gradin...

The extensive research done on the interrelationship between different social factors such as social class, gender and age and different linguistic variables has shown that these factors have important effects on the way language is used. Among these factors a special importance can be placed on age due to the role it plays in revealing different patterns of language use, such as the age-gradin...

study on the livestock diet is one of the main priorities in the management of rangeland in iran. so, this study was conducted to compare preference values of plant species in three age classes of kaboudeh sheep (one, three and five year old ones) in rangelands of bavanat, fars province, iran. for each age class, four sheep were selected and their grazing times from different plant species were...

Quantitative tests of historical hypotheses are necessary to advance our understanding of biogeographic patterns of species distributions, but direct tests are often hampered by incomplete fossil or historical records. Here we present an alternative approach in which we develop a dynamic model that allows us to test hypotheses about regional rates of taxon origination, extinction, and dispersal...

Increased awareness among professionals and the lay public about potential shortand long-term consequences associated with mild brain injuries (BIs) has prompted considerable interest in the topic of identification and recovery patterns. One issue that arises repeatedly relates to distinguishing injuries resulting in chronic symptoms from those to which people appear to have relatively rapid an...