The AGM postulates [4], [1] are widely regarded to have captured much of what is involved in the process of rational belief revision. Recently however, Parikh [7] observed that despite their success, the AGM postulates are rather liberal in their treatment of the notion of relevance. More precisely, Parikh argues that during belief revision a rational agent does not change her entire belief cor...

The transforming growth factor-beta-related factor bone morphogenetic protein 4 (BMP4) is expressed in the human embryonic aorta-gonad-mesonephros (AGM) coincident with the emergence of haematopoietic cells and influences postnatal mammalian haematopoietic stem cells in vitro. To investigate the role of BMP4 in mammalian embryonic haematopoiesis, cells were isolated from murine AGM and two popu...

Hematopoiesis starts with generation of “primitive” erythroblasts and macrophage progenitors in the visceral yolk sac. The earliest strictly defined adulttype or definitive HSCs can be detected in the AGM region at around E11. Accumulation of stem cells activity in the explant cultures of the AGM region strengthened a growing perception that HSCs originate intraembryonically and mammalian hemat...

The relationship between motor maps and cytoarchitectonic subdivisions in rat frontal cortex is not well understood. We use cytoarchitectonic analysis of microstimulation sites and intracellular stimulation of identified cells to develop a cell-based partitioning scheme of rat vibrissa motor cortex and adjacent areas. The results suggest that rat primary motor cortex (M1) is composed of three c...

The outcomes that result from previous behavior affect future choices in several ways, but the neural mechanisms underlying these effects remain to be determined. Previous studies have shown that the lateral (AGl) and medial (AGm) agranular areas of the rat frontal cortex are involved in the learning and selection of action. Here we describe the activity of single neurons in AGl and AGm as rats...

In order to reason about the real world, intelligent systems must have ways of dealing with incomplete and inconsistent information. This issue is addressed in the study of nonmonotonic reasoning, truth maintenance and database update. Belief revision is a formal approach which is central to these areas. This thesis describes a computational approach to the logic of belief revision developed by...

BACKGROUND AND OBJECTIVE Prior studies have suggested that after stroke there is a time-limited period of increased responsiveness to training as a result of heightened plasticity-a sensitive period thought to be induced by ischemia itself. Using a mouse model, we have previously shown that most training-associated recovery after a caudal forelimb area (CFA) stroke occurs in the first week and ...