This technical note presents the ubiquitous problem of query containment for conjunctive queries (an NP-complete problem), and an elegant implementation CQCP of Conjunctive Query Containment in Prolog, in just 7 lines of code. We also describe two important applications of conjunctive query containment: semantic query optimization and minimization. The latter can be implemented by another conci...

Accepted for publication 10 September 1996 Introduction For the past few years, the United States has been engaged in a public policy debate about how to reform the healthcare system to assure access to care while cost containment. Underlying the deliberations is a concern that quality and cost containment are a trade off that is, that efforts to contain costs inevitably result in lower quality...

Recent experience during Australia's initial public health response to the swine influenza pandemic provides valuable lessons for the future. An intense containment effort lasting 7 weeks was unable to prevent local community transmission in some areas of Australia; however, despite the mobility of many people living in rural and remote parts of the country, much of the outback was unaffected. ...

This paper studies a challenging problem of tracking severely occluded objects in long video sequences. The proposed method reasons about the containment relations and human actions, thus infers and recovers occluded objects identities while contained or blocked by others. There are two conditions that lead to incomplete trajectories: i) Contained. The occlusion is caused by a containment relat...

Background. Prevention of loss of containment has become an accepted principle in the treatment of Perthes' disease. The pre-requisite is early recognition. It is based on evaluation of plain radiographs and more recently, on the study of Magnetic Resonance (MR) images which allow discrimination of early cartilaginous changes. Ultrasonography (US) allows visualisation of the lateral cartilagino...