The design of efficient algorithms for planar graphs, as a field of research, is over forty year old and continues to be an exciting area. There are several new efficient algorithms for a variety of graph optimization problems that exploit planarity and, in general, the structure of low genus graphs and graphs with excluded minors. Efficient space-bounded computations, on the other hand, involv...

Reiter (1916) described the case of a young army officer who developed urethritis, conjunctivitis, and arthritis after an attack of dysentery. Although Brodie (1818) had described five similar cases, this triad of urethritis, conjunctivitis, and arthritis of non-gonococcal origin has become known as Reiter's syndrome. Since that time a considerable literature has developed about this disease, t...

Abstract Working from the perspective of Leech’s (The Pragmatics Politeness. Oxford, Oxford University Press, 2014) modification to Blum-Kulka et al .’s (Cross-cultural pragmatics: Requests and apologies. Norwood, NJ, Ablex, 1989) approach classifying requests, this study investigates how far impositive directive speech acts are found in spoken Irish English, a variety English which is well-kno...

Declaration of interest None. Fundingdetailed in Acknowledgements. There is extensive documentation of the prevalence, severity and correlates of posttraumatic stress disorder (PTSD) in Vietnam veterans exposed to the trauma of combat and war-zone service (Kulka et al, 1990). Research with Vietnam combat veterans has been used to create and refine the DSM criteria for PTSD (Shephard, 2001), to ...

Psoriatic arthritis has now gained general acceptance as an entity distinct from rheumatoid disease (Garrod and Evans, 1924; McEwen, Ziff, Carmel, DiTata, and Tanner, 1958; Wright, 1961). Distal interphalangeal joint involvement is a prominent feature of psoriatic arthritis (Avila, Pugh, Slocumb, and Winkelmann, 1960; Bauer, Bennett, and Zeller, 1941; Sherman, 1952), but not of rheumatoid arthr...

As part of the current research programme these laboratories are investigating the synovia of normal and abnormal human joints by light and electron microscopy. By synovia is meant the material lining joints and tendon sheaths on the interior of the fibrous capsule, including, therefore, synovial cells, loose connective tissue, blood vessels, and inflammatory cells which may be present. Several...