This paper presents a method to reduce the commutation torque ripple in a position sensorless brushless DC motor drive. To compensate the commutation torque ripple considerably, the duration of commutation must be known. The proposed method measures the duration of commutation from the terminal voltage of the motor, calculates a PWM duty ratio using the measured commutation interval to suppress...

Poor spectral resolution can be a limiting factor for hearing impaired listeners, particularly for complex listening tasks such as speech understanding in noise. Spectral ripple tests are commonly used to measure spectral resolution, but these tests contain a number of potential confounds that can make interpretation of the results difficult. To measure spectral resolution while avoiding those ...

The authors report the formation of various submicron wrinkle patterns and their transition from onedimensional (1D) ripples to two-dimensional (2D) herringbone structures on poly(dimethylsiloxane) films. Using mechanical force they can separately control the amount and timing of strain applied to the substrate on both planar directions (either simultaneously or sequentially), which appears to ...

We reproduce the symmetric and asymmetric "rippled" P(beta') states of lipid membranes by Monte Carlo simulations of a coarse-grained molecular model for lipid-solvent mixtures. The structure and properties compare favorably with experiments. The asymmetric ripple state is characterized by a periodic array of fully interdigitated "defect" lines. The symmetric ripple state maintains a bilayer st...

This work analyzes the advantages of Artificial Neural Networks applied to sensorless control for Switched Reluctance Motors. Due to the non-linear electrical characteristics of Switched Reluctance Motors, Artificial Neural Networks perform a good tool and for torque ripple minimization in Switched Reluctance Motors. The simulation results to prove the efficiency of a multilayer perceptron in o...

In this article the authors demonstrate how a customer lifetime value approach can provide a better assessment of advertising effectiveness that takes into account post purchase behaviors such as word-of-mouth. While for many advertisers word-of-mouth is viewed as an alternative to advertising, the authors show that it is possible to quantify the way in which word-of-mouth often complements and...

Over the past decade, Korean popular culture has spread infectiously throughout the world. The term, “Korean wave,” has been used to describe this rising popularity of Korean popular culture. The Korean wave exploded in the media across the world generating a ripple effect. The Korean government took full advantage of this national phenomenon and began aiding Korean media industries in exportin...

In this work a model for estimation of the switching activity in ripple-carry adders is presented. The model is based on word-level statistics, such as mean, variance, and correlation, of the two input signals to be added. It is shown that the proposed model gives accurate results when the two’scomplement represented inputs are real world signals.

A dynamic model including non-idealities for a permanent magnet linear synchronous motor (PMLSM) is postulated and verified. The non-idealities acting on the physical linear motor are measured and analyzed. These experimental results are utilized in the model. The verified simulation model is used in developing a force disturbance compensator for the velocity controller of the motor. The force ...

The knowledge economy plays a leading role in current socioeconomic development and has changed industrial development. This study addresses whether changes in industrial development have improved the knowledge innovation, technical level, and productive efficiency of industries. Taiwanese industries were typically labor and technology-intensive and policy-oriented manufacturing industries in t...