Containment and overlap representations of digraphs are studied, with the following results. The interval containment digraphs are the digraphs of Ferrers dimension 2, and the circular-arc containment digraphs are the complements of circular-arc intersection digraphs. A poset is an interval containment poset if and only if its comparability digraph is an interval containment digraph, and a grap...

The aim of this introductory paper is to highlight those underlying chemical principles that are common to all forms of waste management by geological means, and that rely to some extent upon chemical containment. Until recently, chemical processes were usually considered mainly because they can affect the physical performance of engineered containment systems. However, in recent years, many re...

Self-healing systems must be able to adapt to errors and changing resource environments without human intervention. We propose an architectural style, called Containment Units, particularly intended for self-healing systems. Containment Units feature the use of operational, evaluator, and change agent modules to encapsulate different activities required in self-healing systems. We present this ...

This paper considers the problem of containment of conjunctive queries CQ with disjunctive integrity constraints Query containment problem in the pres ence of integrity constraints has been studied broadly especially with functional and inclusion dependencies However to handle incomplete information in the database disjunctions are needed to be expressed as integrity constraints In this paper w...

This paper considers the problem of containment of conjunctive queries (CQ) with disjunctive integrity constraints. Query containment problem in the presence of integrity constraints has been studied broadly, especially with functional and inclusion dependencies. However, to handle incomplete information in the database, disjunctions are needed to be expressed as integrity constraints. In this ...

Wild poliovirus type-2 has been eradicated, use of live type-2 vaccine has been terminated globally, and all type-2 polioviruses are under strict laboratory containment protocols. Re-emergence may arise from prolonged asymptomatic excretion of poliovirus by hospitalised primary immune deficient (PID) patients, as described here, through repeated exposure of close contacts to high titres of infe...

We discuss containment checking for regular expressions with operators like XML Schema’s xs:all, that is, the operator that allows a sequence of letters to occur in arbitrary order. In this report, we model this operator by &, and give several algorithms of containment checking for regular expressions with &. Our algorithms are based on the notion of the permutability of word languages. Keyword...

We study strategies for targeted layered containment of an influenza pandemic in three US cities: Miami, Seattle, and Chicago. Differences in demographic, geographic, and other structures lead to differences in the social interaction networks in the three cities. This has consequences for how the containment strategies should be applied to mitigate the spread. We use large-scale simulations to ...

Abstract Hydraulic fracturing and waterflooding are both widely applied methods for improving the recovery of oil gas resources. These have increasing commonality because many waterfloods being carried out at high enough pressure to generate hydraulic fractures. Even so, it is challenging engineers make an optimal wellbore design layered otherwise complex underground formations. An overly aggre...