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This paper compares the performance and the robustness of several linear adaptive controllers using a linear system with time–varying disturbance in the presence of measurement noise. For the purpose of comparison we select the direct and indirect model reference adaptive controller (MRAC), the direct MRAC with σ–modification, and the L1 adaptive controller. Using tools from linear systems theory
Bates (1976) is the starting-point for an analysis of pointing that does not involve explicit higher-order intentions. It is claimed that declarative pointing is essentially intersubjective, while imperative pointing is based on behaviourally motivated regularities. Declarative pointing has an indicating function. Other behaviours associated with it pertain either to its preparatory and enabling c
Neurochemical evidence indicates that cognitive impairment in dementia of Alzheimer type (DAT) is related to degeneration of cholinergic neurons in the brain. A pharmacological approach is treatment with a cholinesterase inhibitor such as tetrahydroaminoacridine (THA). THA treatment of 17 patients with DAT was studied with a double-blind crossover design with three types of treatment, THA + lecith
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