The purpose of this study was to investigate possible influences of pitch register and dynamic level on vibrato rates and widths of university and high school violin and viola players. Analysis showed that pitch register significantly affected the vibrato rates and widths of the performers. Musicians vibrated 0.32 Hz faster and approximately 26 cents wider during high pitches than during low pi...

Understanding the process of adult language learning has recently undergone advances due to the consideration of how individual differences (IDs) in cognitive processing, such as working memory (WM), affect acquisition. We know that implicit versus explicit learning conditions also influence learning, however, the potential interactions between IDs, the efficacy of implicit versus explicit lear...

We report the experimental observation of the generation of short electrical pulses in a switch line, which is a transmission line periodically loaded with electronic switches. Pulse-width compression was experimentally demonstrated in the test switch line, using discrete Esaki diodes as the switches.

The regulation by DTC of the induction motor is a quite “natural” method, being much lighter, as mathematical support, than the vector control, regardless the type of field considered for orientation. Despite its simplicity, the practical implementation of the method rise serious problems, mainly due to the fact that the sampling period for regulation pourposes is right the minimum PWM period o...

In this paper some sensorless strategies for induction motor drives are reviewed and analyzed. A method for accurately obtaining the PWM stator voltage is used to minimize the problem of estimating stator flux from the stator voltage equation in low speeds. A Gopinath style stator flux observer is presented and its capability to compensate for stator voltage errors is discussed.

Voltage Unbalance is a common type of power quality problem. Sequence components occur during unbalance in three phase system. For this reason unbalance is assessed with respect to the sequence components present in the system. Voltage unbalance may adversely affect power system components connected to the system. In this paper, for symmetric and asymmetric faults, positive sequence voltage is ...

Passivity{based feedback controllers are derived for the indirect stabilization of the average output voltage in Pulse{Width{Modulation (PWM) controlled dc{to{dc power converters of the \boost", \buck{boost" and \buck" types. The controller design is carried out on the basis of well known average PWM models of such circuits. These models are shown to be Euler{Lagrange systems corresponding to a...

Tomoko Imasaka 1,*, Akifumi Hamachi 2, Tomoya Okuno 2 and Totaro Imasaka 2,3 1 Laboratory of Chemistry, Graduate School of Design, Kyushu University, Fukuoka 815-8540, Japan 2 Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan; [email protected] (A.H.); [email protected] (T.O.); [email protected] (T.I....

EMISAR is a fully polarimetric, dual frequency (Land Cband) SAR system designed for remote sensing applications. The data are usually processed to 2x2 m resolution. The system has the capability of C-band cross-track single-pass interferometry and fully polarimetric repeat-pass interferometry. The SAR is operated at high altitudes on a Gulfstream G-3 jet aircraft. The system is very well calibr...