The absorption properties of charge transfer organic semiconductor TTF-TCNQ (tetrathiafulvalene-tetracyanoquhodimete ) filmsdeposited on KBr singlecrystal, quartz and glass substrates in far infrared have been investigated. An absorption edge at ?10 ??m was observed. Photoconductivity, photoconduction efficiency and gain and photocarrier's lifetime have been measured. The results show an el...

background: anxiety disorders and substance abuse are commonest comorbidities among bipolar i disorder (bid) patients. this study investigated the prevalence of anxiety disorders among bid patients based on their dependency on opioid. methods: in this cross sectional study the bid patients in iranian hospital of psychiatry were divided into two 89-patient groups; one group was considered as opi...

population in all countries plays a fundamental role in economic growth and economic development. but besides absolute size and growth rate of population, the more important factor will be “age structure” or “age distribution” of population, because it can be as source of many economical, social, and political challenges. in this research, we investigate effect of changes in population shares i...

Syntactic structures have been analysed in terms of constituent hierarchies and also in terms of dependency relations. While these two traditions have sometimes been presented as competing with each other, there is no reason in principle why syntactic dependencies and constituent hierarchies should not both be part of the grammar, complementing each other. Indeed, within transformational gramma...

Often in summarisation, we are required to generate a summary sentence that incorporates the important elements of a related set of sentences. In this paper, we do this by using a statistical approach that combines models of n-grams and dependency structure. The approach is one in which words are recycled and re-combined to form a new sentence, one that is grammatical and that reflects the cont...