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- Amir Lass, Fidelis Akagbosu, +4 authors Peter R. Brinsden
- Human reproduction
- 1998

The improved survival in recent years of young males suffering from cancer, and an understanding of the gonadotoxic effects of chemotherapy treatment, have motivated patients and clinicians to preserve fertility potential before embarking on adjuvant therapy. Among 231 men (mean age 28.0; range 15-56 years) diagnosed with malignant disease and referred to… (More)

- Munther A. Hassouneh, Hsien-Chiarn Lee, Eyad H. Abed
- 2004

Advantages and limitations of washout filters in feedback control of both continuous-time and discretetime systems are discussed and generalizations that alleviate the limitations are presented. Some previously unpublished results in the Ph.D. dissertation of one of the authors (Lee, 1991) are presented in the context of their relation to the generalized… (More)

- Munther A. Hassouneh, Eyad H. Abed, Helena E. Nusse
- Physical review letters
- 2004

Physical and computer experiments involving systems describable by piecewise smooth continuous maps that are nondifferentiable on some surface in phase space exhibit novel types of bifurcations in which an attracting fixed point exists before and after the bifurcation. The striking feature of these bifurcations is that they typically lead to "unbounded… (More)

- Wael A. Hashlamoun, Munther A. Hassouneh, Eyad H. Abed
- IEEE Trans. Automat. Contr.
- 2009

This paper presents a new fundamental approach to modal participation analysis of linear time-invariant systems, leading to new insights and new formulas for modal participation factors. Modal participation factors were introduced over a quarter century ago as a way of measuring the relative participation of modes in states, and of states in modes, for… (More)

This paper introduces washout filter-aided feedback in the design of Static Var Compensator (SVC) control to increase the range of stable operation of a power system susceptible to voltage collapse. The use of such a control automatically maintains the open-loop steady state operating conditions. In contrast to static state feedback designs, washout-filter… (More)

Feedback controls that stabilize border collision bifurcations are designed for piecewise smooth systems undergoing border collision bifurcations. The paper begins with a summary of the main results on border collision bifurcations, and proceeds to a study of stabilization of these bifurcations for one-dimensional systems using both static and dynamic… (More)

- Munther A. Hassouneh, Eyad H. Abed
- I. J. Bifurcation and Chaos
- 2004

The quenching of alternans is considered using a nonlinear cardiac conduction model. The model consists of a nonlinear discrete-time piecewise smooth system. Several authors have hypothesized that alternans arise in the model through a period doubling bifurcation. In this work, it is first shown that the alternans exhibited by the model actually arise… (More)

The feedback control of border collision bifurcations is considered for two-dimensional discrete-time systems. These are bifurcations that can occur when a fixed point of a piecewise smooth system crosses the border between two regions of smooth operation. The goal of the control effort is to modify the bifurcation so that the bifurcated steady state is… (More)

Today’s electric power systems are often subject to stress by heavy loading conditions, resulting in operation with a small margin of stability. This has led to research on estimating the distance to instability. Most of these research efforts are solely model-based. In this work, a signal-based approach for real-time detection of impending instability is… (More)

Today’s electric power systems are often subject to stress by heavy loading conditions, resulting in operation with a small margin of stability. This has led to research on estimating the distance to instability. Most of these research efforts are solely model-based. In this work, a signal-based approach for real-time detection of impending instability is… (More)