Online fit of an analytical response matrix model for orbit correction and optical function measurement

At the Karlsruhe Research Accelerator (KARA), an analytical online model of the orbit response matrix (ORM) has been developed and tested. The model, called the bilinear-exponential model with dispersion (BE+d model), is derived from the Mais-Ripken formalism describing coupled betatron motion. Compared to the standard approach of measuring the ORM, this method continuously adapts to changing beam optics without a dedicated measurement. It is especially useful for storage rings without turn-by-turn capable beam position monitors (BPMs) as the online model also gives access to estimates of the coupled optical functions. In the following, experimental orbit correction results and a comparison of fitted and simulated optical functions are presented

The structural basis of information transfer from medial temporal lobe to prefrontal cortex in the Macaque monkey

A variety of functional studies have emphasized the importance of The medial temporal lobe (MTL) and prefrontal cortex (PFC) for episodic and working memory, respectively. We investigated the structural basis of information transfer from MTL to PFC in primate cerebral cortex using the CoCoMac database (www.cocomac.org), coordinate-independent mapping procedures, and multivariate statistics. In our meta-analysis, we found a clearly decreasing gradient of MTL projections to PFC: strongest from perialloconical regions and weakest from hippocampus proper. These projections roughly divide the PFC into medial and lateral groups of areas. (C) 2002 Elsevier Science B.V. All rights reserved