Abstract Implementing complex algorithms for big data, artificial intelligence, and graph processing requires enormous effort. Succinct, declarative programs to solve problems that can be efficiently executed batching streaming data are in demand. This paper presents Nexus, a distributed Datalog evaluation system. It evaluates using the semi-naive algorithm batch incremental asynchronous iterat...

This paper examines how the concept of 'excessive costs' has been interpreted in the implementation of industrial pollution control in the UK. Since 1984, industrial air pollution regulation in the EU has been guided by the framework concept of Best Available Technology Not Entailing Excessive Costs (BATNEEC). With the introduction of the Integrated Pollution Prevention & Control Directive in 1...

In the past decade the number of studies in labour market dynamics has proliferated. Especially the papers by Davis and Haltiwanger ~1990, 1992! on job creation and job destruction in the USA were followed by a host of studies on job flows in other countries. Examples include Burda and Wyplosz ~1994! for a number of European countries, Leonard and Van Audenrode ~1993! for Belgium and Blanchflow...