It is often claimed that concepts are the building blocks of thoughts. If this claim is true, as I think it is, any adequate theory of cognition will require a theory of concepts. Both philosophers and psychologists have attempted to give such a theory, however, as with most of nature’s building blocks, developing a theory of concepts has not been an easy task. I want to argue that the difficul...

This is a slightly revised version of a paper to appear in the proceedings of the IFIP 83 Congress. This research was supported in part by the Defense Advanced Research Projects Agency (DOD), ARPA Order No. 3597, monitored by the Air Force Avionics Laboratory under Contract F33615-81-K-1539, and in part by the U.S. Army Communications R&D Command under Contract DAAK80-81-K-0074. The views and c...

INTRODUCTION A distinction has been proposed, on theoretical grounds, between referential and inferential semantic abilities. The former account for the relationship of words to the world, the latter for the relationship of words among themselves. The hypothesis of, at least partially, different neurological underpinnings for this distinction has been supported by the presence of double dissoci...

In this paper, a novel stator current based Model Reference Adaptive System (MRAS) estimator for speed estimation in the speed-sensorless vector controlled induction motor drives is presented. In the proposed MRAS estimator, measured stator current of the induction motor is considered as a reference model. The estimated stator current is produced in an adjustable model to compare with the measu...