We address the problem of deriving meaningful semantic index information for a multi-media database using a semi-structured document model. We show how our framework, called feature grammars, can be used to (1) exploit third-party interpretation modules for real-world unstructured components, and (2) use context-free grammars to convert such poorly or unstructured input to semi-structured outpu...

A context-free grammar G (henceforth abbreviated to “grammar”) is a 4-tuple (N,V, P, S) consisting of the following components: a finite set N of non-terminal variables, a finite set V of terminal variables that is disjoint from N , a finite set P of production rules, mapping non-terminal variables to a series of non-terminals and terminals, and a distinguished symbol S ∈ N that is the start sy...

BACKGROUND Recruitment is a challenge in developing population-representative pregnancy and birth cohorts. METHODS We developed a collaborative recruitment infrastructure (CRI) to recruit pregnant women for 4 pregnancy cohorts using: faxes from obstetrical offices, in-clinic recruiters, university and funder-driven free-media events, paid-media, and attendance at relevant tradeshows. Recruitm...

The equations of fluids in porous media are very useful in designing the rockfill and diversion dams, gabions, breakwaters and ground water reserves. Researches have been showed that the Forchheimer equation is not sufficient for the analysis of hydraulic behavior of free-surface radial flows; because, in these flows, in addition to the hydraulic gradient and velocity, the variable of radius is...

The aim of this study was to evaluate the effects of alginate entrapment on fermentation metabolites of Kluyveromyces marxianus grown in agrowastes that served as the liquid culture media. K. marxianus cells entrapped in Na-alginate were prepared using the traditional liquid-droplet-forming method. Whey and pomaces from processed tomatoes, peppers, and grapes were used as the culture media. The...

Azotobacter vinelandii strain ATCC 12837 and A. chroococcum strain H23 (CECT 4435) were able to grow on N-free or NH4Cl-amended chemically-defined (Burk's) media, with protocatechuic acid (1-2 mmol 1(-1)) or sodium p-hydroxybenzoate (1-10 mmol 1(-1)) as sole carbon (C) sources. At a concentration of 2 mmol 1(-1), both substrates supported nitrogen fixation (acetylene reduction assay) at similar...

The results of this study has revealed a significant increase in I(131) uptake of cultivated thyroid gland in the media containing petroleum ether extract of Commiphora mukul. Besides, T(3) resin uptake, protein bound iodine as well as free thyroxine index in the media are also observed to be significantly (P 0.001) increased. When explants are cultivated in the media containing melatonin, ther...