A theory of memory retrieval is developed and is shown to apply over a range of experimental paradigms. Access to memory traces is viewed in terms of a resonance metaphor. The probe item evokes the search set on the basis of probe-memory item relatedness, just as a ringing tuning fork evokes

High performance control of the permanent magnet synchronous motor using self-tuning resonant controllers

The magneto-electric coupling and magneto-capacitance effect of a layer composite ferromagnet / piezoelectric/ferromagnet was investigated. Several resonant peaks were observed on the curves of the capacitance versus frequency. The resonant peaks were found to shift under an applied magnetic field

Abstract: The use of a Variable Reluctance Link (VRL) to control a tuning mechanism for a vibrating energy harvester is introduced here for the first time. Magnetic flux from a tuning magnet creates a virtual spring by interacting with a magnet on the cantilever of the vibrating harvester. To vary

acoustically tuned resonators for the

of the molecules. Aligning the Fermi levels to an energy level, a nearly tenfold increase in the tunneling current that flows between the substrate and the STM tip via the molecules, due to resonant tunneling is observed. This experiment also shows that structurally similar molecules may be identified with STM

ABSTRACT This paper addresses the principles of testing long submarine solid dielectric cables with AC-voltage, using up to date high voltage equipment with frequency tuning. It is shown that lengths up to 100 km or more is possible to test if all parameters affecting such tests are taken

We demonstrate an adaptation strategy for adjusting the stride period in a hexapedal running robot. The robot is inspired by discoveries about the self-stabilizing properties of insects and uses a sprawled posture, a bouncing alternat-ing-tripod gait, and passive compliance and damping in the limbs to achieve fast (over 4 body-lengths per second), sta-ble locomotion. The robot is controlled by an open-loop motor pattern that activates the legs at fixed intervals. For maximum speed and efficiency, the stride period of the pat-tern should be adjusted to match changes in terrain (e.g. slopes) or loading conditions (e.g. carrying an object). An ideal adaptation strategy will complement the design philos-ophy behind the robot and take advantage of the self-stabi-lizing role of the mechanical system. In this paper we describe an adaptation scheme based on measurements of ground contact timing obtained from binary sensors on the robot's feet. We discuss the motivation for the approach, putting it in the context of previous research on the dynamic properties of running machines and bouncing multi-legged animals, and show results of experiments.

Couplings of asynchronously tuned coupled microwave

previously confirmed a suggestion by Sundberg that, in their high range, sopranos tune the first tract resonance to or slightly above the frequency of the note sung, thereby increasing power and timbral homogeneity. For male voices, the fundamental (f0) would exceed the normal value of the first resonance (R