A model order reduction method is developed for an operator with a non7 empty null-space and applied to numerical solution of a forward multi-frequency 8 eddy current problem using a rational interpolation of the transfer function in the 9 complex plane. The equation is decomposed into the part in the null space of the 10 operator, calculated exactly, and the part orthogonal to it which is appr...

─ 83─ Department of Radiology and the Research Institute of Radiology, Departments of Pathology and Otolaryngology, University of Ulsan, College of Medicine, Asan Medical Center, Korea This study was supported by a grant from the Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea. (A080201). Received July 28, 2008 ; Accepted October 20, 2008 Address reprint...

Digital radio links with bandlimited pulses exhibit a severe performance degradation when the transmitter high power amplifier operates near saturation. To cope with the increase of nonlinear intersymbol interference due to the amplifier nonlinearities, a discrete-time Volterra system can be used to process the transmitted data. We present an efficient technique for implementing adaptive data p...

T he keys to organizational success are constantly changing. As the global economy evolves in the direction of knowledgebased enterprise, the ability to create and manage information is essential. The decisions that managers make have large operational and financial implications. However, managers often lack the information needed to make sound decisions. When faced with challenges in their org...

On February 1, 2003, the Space Shuttle Columbia, on its way to its landing site in Florida, blew apart in the skies of East Texas. Its seven-member crew perished. The $2 billion ship was lost; some destruction occurred on the ground, and considerable cost was incurred to recover debris scattered over several states. The disaster sounded an eerie echo from the past. Seventeen years earlier the s...

E thical diversity abounds in organizations. That is, there are diverse beliefs among employees, managers, and executives in organizations as to what are the most ethically appropriate or inappropriate courses of actions to take in their daily workplace situations. Consider the following five examples of ethical diversity, each of which comes from the authors’ direct work experience, consulting...

Simple proofs are provided for two properties of a new multivariate polynomial interpolation scheme, due to Amos Ron and the author, and a formula for the interpolation error is derived and discussed. AMS (MOS) Subject Classifications: 41A63, 41A05; 41A10 Author’s affiliation and address: Center for the Mathematical Sciences University of Wisconsin-Madison 610 Walnut St. Madison WI 53705 1 supp...

The general, linear eigenvalue equations (H XM)z = 0, where H and M are real symmetric matrices with M positive semidefimte, must be transformed if the Lanczos algorithm is to be used to compute eigenpairs (X,z). When the matrices are large and sparse (but not diagonal) some factorization must be performed as part of the transformation step. If we are interested in only a few eigenvalues a near...

A voiceldata cellular system is studied in this work. Analytical methods are used based on generating functions techniques. An extended simulation analysis it was also carried out, defining the main performance parameters and their impact on system behaviour. The limits or analytical study are investigated and solutions through simulation methods are proposed. 1. INTRQDUCTION UTURE communicatio...

About two months ago I was walking in Georgetown on a perfectly sunny Sunday afternoon. The sidewalk I was on had no uneven sections, and it was dry with no ice or snow. Suddenly, I was falling forward. I attempted to catch myself and just could not coordinate my legs to stop the fall. I used my right arm and shoulder to break the fall and the sidewalk won out. As I sat up on the sidewalk I was...