Front cover: Cover image: see E. Schachner et al., 'Anatomy, ontogeny, and evolution of the archosaurian respiratory system: a case study on Alligator mississippiensis Struthio camelus', this issue.

Jen Webb reviews Julia Prendergast’s Bloodrust; Kevin Brophy Paul Magee’s Suddenness and the Composition of Poetic Thought; Dominic Symes Marcelle Freiman’s Spirit Level; Fazzari Marion May Campbell’s languish, Rosemary Williamson Roslyn Petelin’s How Writing Works: A Field Guide to Effective (2nd Edition).

Dinenno, Frank A., Pamela P. Jones, Douglas R. Seals, and Hirofumi Tanaka. Age-associated arterial wall thickening is related to elevations in sympathetic activity in healthy humans. Am J Physiol Heart Circ Physiol 278: H1205–H1210, 2000.—Arterial wall hypertrophy occurs with age in humans and is a strong predictor of cardiovascular disease risk. The responsible mechanism is unknown, but data f...

1111 BMJ VOLUME 316 11 APRIL 1998 www.bmj.com The largest study yet to be carried out on serum screening for Down’s syndrome has shown that it can be performed accurately during the first trimester of pregnancy, confirming previous findings and backing the opinion of many leading specialists that tests should be carried out earlier. The study, carried out in the United States, screened 4412 pre...

The technique of using the “particle-in-cell” method was developed in the field of plasma physics [l]. B orrowed for problems of intense beams, it becomes an especially powerful tool because such problems frequently use single species “plasmas” and so pose a less severe requirement on the computer. We will look at several problems in which the PIC code method has been useful. The first is the c...

b. Nominative object: AGR P AGR ' s s 6 5 5 5 5 Spec AGR V NP PP s There 3PL are people at the door < LF movement c. Accusative object: AGR P AGR P AGR ' s o o 6 5 5 5 5 5 Spec Spec AGR V NP o John reads a book < LF movement In (1a), the "functional" head AGR enters into a double agreement relation s(ubject) with its specifier: the 0-features of the specifier are copied onto the head, and a Cas...

Up until now, we have mainly studied how to decrease the query time, and the preprocessing time of our data structures. In this lecture, we will focus on maintaining the data as compactly as possible. Our goal will be to get as close the information theoretic optimum as possible. We will refer to this optimum as OPT. Note that most ”linear space” data structures we have seen are still far from ...