in this reaserch by comparing some of the recent litreture on indentification production function, we estimate total factor productivity. we focus on parametric methods, especially blundell and bond (2000), ollay and pakes (1996), levinsohn and petrin (2003) and ols.using panel data on plant-level of 4-digits isic in iran from 1380 to 1390. we choose levinsohn and petrin (2003) as the most appr...

background and objectives:infection of pleural fluid is a common disease and because of antibiotic administration, the microbiology of this fluid has changed. the aim of this study was to determine the common bacteria and suitable antibiotics for treatment in pleural effusion (pe). materials and methods: in this cross sectional study, 1210 samples with exudative features were cultured for poss...

despite recent innovations in the laboratory diagnosis of bacterial from nonbacterial meningitis, solid data-necessary for early determination of bacterial meningitis (bm) before organism growth in the culture medium-are missing. therefore cerebrospinal fluid (csf) lactate levels were evaluated as a possible means of differentiating the two clinical entities. this was a retrospective study. pat...

In library applications, radio frequency indentification (RFID) technology, sensors, and wireless transmission networks have been applied to various services such as self-service checkout return systems, electronic reader cards, intelligent bookshelves, monitoring of premises, augmented reality (AR) interactive picture books, physical corridors, seat reservations; in regional alliances, real cr...