Metallphysikby G. E. R. Schulze

C E N T E R F O R R E S E a R C H I N L a N G U a G E

A 3-layer back propagation network is used to implement a pattern association task which learns mappings that are analogous to the present and past tense forms of English verbs, i.e., arbitrary, identity, vowel change, and suffixation mappings. The degree of correspondence between connectionist models of tasks of this type (Rumelhart & McClelland, 1986; 1987) and children’s acquisition of infle...

G R a M M a T I C a L P I C T U R E G E N E R a T I O N

A Certain Type of I R R E G U L a R Algebraic Surfaces

A. Van de Ven has pointed out in connection with his recent results(1) that there are not many known examples of compact connected complex 4-manifolds with positive indices. The purpose of this note is to exhibit a series of compact connected complex 4-manfolds M . . . . n, m = 2, 3, 4, ..., with positive indices. Each complex 4-manifold Mn.m is an irregular algebraic surface having a structure...

B I O E N G I N E E R I N G Computational Modeling of Arterial Biomechanics

The arteries deliver blood from the heart to tissues, while the veins return blood to the heart. Although we sometimes think of arteries and veins as simple tubes, in reality they are much more complex: they curve and branch, which profoundly influences blood flow and biomechanical forces within the arterial wall. The artery wall is composed of several types of cells that interact with each oth...

Distinguishing ontologies Comment on LLOYD , G . E . R .

Geoffrey Lloyd’s latest book is an essay on comparative ontology, how to conduct such a comparison and why. Apart from its intrinsic merits—acute analytical insight, vast erudition lightly worn, clarity of purpose, and an engaging style of writing—the book is timely, given the prominence the issue of ontologies has gained in recent works both in anthropology and philosophy. Lloyd draws on three...