Asymmetry of Motor Behavior and Sensory Perception: Which Comes First?

ETL and Data Quality : Which Comes First ?

Usually, an early task in any data warehousing project is a detailed examination of the source systems, including an audit of data quality. Data quality issues could include inconsistent data representation, missing data and difficulty around understanding relationships between the various source systems. As ETL and Data Quality technologies converge, it’s important to use the right tools at th...

Modeling and Functional Modeling – Which Comes First ?

In the analysis phase of the information system development (ISD), the users' requirements are studied and defined. In most ISD methodologies, the requirements are defined by two models: a conceptual data model in form of e.g. an entity-relationship (ER) diagram or a class diagram; and a functional model in form of e.g. data flow diagrams (DFD) or use cases. Different ISD methodologies prescrib...

Immigration and Job Creation: Which comes First?

Does immigration generate jobs in an MSA, or do employment opportunities entice immigrant inflows to an MSA? Is immigration responsible for higher unemployment, or do foreign-born inflows cause increases in self-employment that lead to improvement in labor market conditions? The causal relationship between immigrants, job growth and unemployment is a politically and economically salient subject...

diabetes mellitus and fatty liver disease: which comes first?

Megacities and High Speed Rail systems : which comes first ?

A megacity is usually defined as a metropolitan area with a total population in excess of 10 million people. The number of megacities is increasing worldwide: in 1950 they were 4; in 1980 they were 28, in 2002 they were 39 and by 2015 they will be 59. In most agglomerations and megacities, urban planning and public infrastructure can guide the urban development in order to achieve a proper sust...