Neural Mechanisms for Information Compression by Multiple Alignment, Unification and Search

This article describes how an abstract framework for perception and cognition may be realised in terms of neural mechanisms and neural processing. This framework — called information compression by multiple alignment, unification and search (ICMAUS) — has been developed in previous research as a generalized model of any system for processing information, either natural or artificial. It has a range of applications including the analysis and production of natural language, unsupervised inductive learning, recognition of objects and patterns, probabilistic reasoning, and others. The proposals in this article may be seen as an extension and development of Hebb’s (1949) concept of a ‘cell assembly’. The article describes how the concept of ‘pattern’ in the ICMAUS framework may be mapped onto a version of the cell assembly concept and the way in which neural mechanisms may achieve the effect of ‘multiple alignment’ in the ICMAUS framework. By contrast with the Hebbian concept of a cell assembly, it is proposed here that any one neuron can belong in one assembly and only one assembly. A key feature of present proposals, which is not part of the Hebbian concept, is that any cell assembly may contain ‘references’ or ‘codes’ that serve to identify one or more other cell assemblies. This mechanism allows information to be stored in a compressed form, it provides a robust mechanism by which assemblies may be connected to form hierarchies and other kinds of structure, it means that assemblies can express abstract concepts, and it provides solutions to some of the other problems associated with cell assemblies. Drawing on insights derived from the ICMAUS framework, the article also describes how learning may be achieved with neural mechanisms. This concept of learning is significantly different from the Hebbian concept and appears to provide a better account of what we know about human learning

A 'seamless enactment' of citizenship education

Educational undertakings are subject to disjunctures at three separate stages: in the creation of curricular programmes, in the implementation of these curricula in practice and in their effects on students. These disjunctures are the result of complex `leaps' between ends and means, and between ideal and real. This article proposes a response in the form of `seamless enactment', applied here to citizenship education. Seamless enactment involves, first, the harmonisation of the principles underlying the different stages in the passage of the curriculum, avoiding problematic tensions between, for example, democratic aims and undemocratic teaching practices. Second, it requires the involvement of teachers and students in the design and development of the educational initiative, as well as in its implementation. Taken to its fullest extent, seamless enactment involves a unification of the separate stages, leading to the collapsing of the curricular transposition framework onto a single point. Finally, some possible justifications for and potential objections to the notion are considered

Constructing meaning in the service of power : an analysis of the typical modes of ideology in accounting textbooks

This paper provides an analysis of the typical modes of ideology in introductory financial accounting textbooks and training materials. Drawing on Thompson's (1990) schema concerning the typical linguistic modes through which ideology operates, this research suggests that the operation of ideology is apparent within educational accounting texts, with particular strategies being more evident than others: in particular, the strategies of universalization, narrativization, rationalization and naturalization. Given the predominantly technical nature of introductory financial accounting textbooks and training manuals, the modes of ideology identified in the texts were often quite subtle; more specifically, the ideological characteristics displayed in each of the six texts analysed were often expressions of implicit or taken-for-granted assumptions

Quantum gravity: unification of principles and interactions, and promises of spectral geometry

Quantum gravity was born as that branch of modern theoretical physics that tries to unify its guiding principles, i.e., quantum mechanics and general relativity. Nowadays it is providing new insight into the unification of all fundamental interactions, while giving rise to new developments in modern mathematics. It is however unclear whether it will ever become a falsifiable physical theory, since it deals with Planck-scale physics. Reviewing a wide range of spectral geometry from index theory to spectral triples, we hope to dismiss the general opinion that the mere mathematical complexity of the unification programme will obstruct that programme.Comment: This is a contribution to the Proceedings of the 2007 Midwest Geometry Conference in honor of Thomas P. Branson, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA