In the global race for competitive advantage Knowledge Management gains increasing importance for companies. The purposeful and systematic creation, maintenance, and transfer of unstructured knowledge sources demands for advanced Information Technology. Ontologies constitute a basic ingredient of Knowledge Management; thus, ontology learning from unstructured knowledge sources is of particular ...

This paper presents a conceptual analysis of inequalities in healthcare associated with the discussion of dimensions, indicators and data sources that are crucial for understanding major trends within the Brazilian context. From this standpoint, the text emphasizes the importance of in-depth discussions of social inequalities, identifying changes in healthcare conditions using the concept of di...

BACKGROUND Even a well-designed randomized control trial (RCT) study can produce ambiguous results. This article highlights a case in which full-sample results from a large-scale RCT in the United Kingdom differ from results for a subsample of survey respondents. OBJECTIVES Our objective is to ascertain the source of the discrepancy in inferences across data sources and, in doing so, to highl...

The U.S. Census Bureau reports that Hispanics are the country's largest and fastest growing minority, representing about 14.4 percent of the population in 2005 (Census Bureau 2006b). By 2050, Hispanics will account for an estimated 24.4 percent of the population--or 1 in every 4 persons in the United States (Census Bureau 2004, Table 1 a). The Hispanic population tends to be younger than the ov...

Researchers interested in the relationships between place and health have been slow to incorporate a life course perspective, probably due to the lack of readily available historical environmental data. This hinders the identification of causal relationships. It also restricts our understanding as to whether there are accumulative effects over the life course and if there are critical periods i...

the imagination among iranian and western sages and philosophers, is the most basic and most complex issues of the universe. the research question is whether the imagination is considered the main essence of the aesthetic style of farshchian? and if so, what was the kind of imagination or the artist’s approach to this element? in this paper, for the first time, it is attempted to critically exa...

The estimation of the size of deep web data sources has been an open problem since 1998. This survey reviews all papers that were available online, and other, resources, on estimating the size of data sources during the period 1998 to 2008. In the survey, we first clarify several basic terms that are used in the survey but whose meanings vary in the literature. Basic models in the literature on...

This paper looks into the overall energy pattern in rural China and the possible reasons behind based on an assessment of available data sources. Commercial energy consumption by rural residents is disproportionately lower than that by their urban counterparts. Moreover, biological matters are the dominant source of household fuels in rural areas. Variations in energy consumption are closely re...

BACKGROUND Marriage histories are a valuable data source for investigating nuptiality. While researchers typically acknowledge the problems associated with their use, it is unknown to what extent these problems occur and how marriage analyses are affected. OBJECTIVE This paper seeks to investigate the quality of marriage histories by measuring levels of misreporting, examining the characteris...

This article asks whether information about immigrants beyond their age, education, and years since migration can be productively used to project their earnings. Although many factors could affect immigrant earnings, what is most useful for Social Security modelling purposes is relevant information that is readily available on a continuous basis. Country of origin is a good candidate, as it is ...