Private information retrieval (PIR) schemes enable a user to access one or more servers that hold copies of a database and privately retrieve parts of the n bits of data stored in the database. This means that the queries give each individual database no partial information (in the information theoretic or computational sense) on the identity of the item retrieved by the user. All known PIR sch...

Keyword advertising, or “sponsored links” that appear alongside online search results or other online content, has grown into a multibillion-dollar market. Providers of keyword advertising, such as Google and Yahoo, profit by auctioning keywords to advertisers. An issue of increasing importance for advertising providers is the “share structure” problem—that is, of the total available resources ...

In this paper we introduce a minimalist hypothesis for keywords extraction: keywords can be extracted from text documents by considering concepts underlying document terms. Furthermore, central concepts are individuated as the concepts that are more related to title concepts. Namely, we propose five metrics, that are diverse in essence, to compute the centrality of concepts in the document body...

•Extending our previous work on visual keywords, we use the concept of template-based visual keywords using MPEG-7 color descriptors. MPEG-7, also called the Multimedia Content Description Interface, has been a standard for many years. These color descriptors have the ability to characterize perceptual color similarity and need relatively low complexity operations to extract them, besides being...

background: hemophilia is a chronic bleeding disease and can interfere with daily performance of children. these children require continuous training to prevent bleeding. since children nurses play an important role in the education of sick children and their self-efficacy and the increase use of educational computer games, the use of educational games for teaching self-efficacy to children wit...

despite numerous studies on the prevalence of temporomandibular joint disorders (tmjds) in adults, those performed in children are limited. this study determined the prevalence of tmjds in 9-12-year-old kermanian boy students living in southeast of iran. 240 boy students selected by randomized method and studied through a descriptive cross-sectional epidemiologic survey including interviews and...

the effect of marital counseling on marital satisfaction of parents of mental retarded children     jenaabadi h [1] *     received: 15 mar , 2012 accepted: 14 jun , 2012    abstract   background & aims: parents of mental retarded children have many problems in maintenance, training and education of their children. these problems have negative impact on parent’s mental health and marital satisfa...

           Background and Objectives: Some children are at risk of middle ear infections; however, the impact of the fluctuating hearing sensations on cognitive systems and immature central auditory is not fully recognized. Therefore, we reviewed and discussed the impact of early-otitis media on the cognitive skills of affected school-aged children. Methods: A computerized search of the databa...