This study introduces a video compression method that uses spatio – temporal lifting based algorithms to compress the video signals. The temporal correlation of consecutive frames causes temporal redundancies which are subject to lifting-like motion predictive compression. Moreover, the spatial correlation between neighbouring pixels of the same frame is subject to intra-frame wavelet compressi...

controlled vocabularies have been frequently used in information retrieval systems. control of the vocabularies and evaluating the utility of their terms are two critical questions. this research aims at the development of persian subject headings through statistical analyses. the current research was conducted on more than 450,000 records extracted from the electronic version of national bibli...

this study investigates correlation between journal self – citation and impact factor in agriculture and veterinary subject category through the scientific journals indexed in isc's pjcr during 2001 to 2007. citation analysis is used to conduct the research. the results indicate a significant correlation between impact factor and journal self – citation (r=0.425, sig= 0.000); that is, journals ...