In The Supernatural and the Circuit Riders, Rimi Xhemajli shows how a small but passionate movement grew and shook the religious world through astonishing signs and wonders. Beginning in the late eighteenth century, early American Methodist preachers, known as circuit riders, were appointed to evangelize the American frontier by presenting an experiential gospel: one that featured extraordinary phenomena that originated from God’s Spirit. In employing this evangelistic strategy of the gospel message fueled by supernatural displays, Methodism rapidly expanded. Despite beginning with only ten official circuit riders in the early 1770s, by the early 1830s, circuit riders had multiplied and caused Methodism to become the largest American denomination of its day. In investigating the significance of the supernatural in the circuit rider ministry, Xhemajli provides a new historical perspective through his eye-opening demonstration of the correlation between the supernatural and the explosive membership growth of early American Methodism, which fueled the Second Great Awakening. In doing so, he also prompts the consideration of the relevance and reproduction of such acts in the American church today.

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The essential introduction to the principles and applications of feedback systems—now fully revised and expanded This textbook covers the mathematics needed to model, analyze, and design feedback systems. Now more user-friendly than ever, this revised and expanded edition of Feedback Systems is a one-volume resource for students and researchers in mathematics and engineering. It has applications across a range of disciplines that utilize feedback in physical, biological, information, and economic systems. Karl Åström and Richard Murray use techniques from physics, computer science, and operations research to introduce control-oriented modeling. They begin with state space tools for analysis and design, including stability of solutions, Lyapunov functions, reachability, state feedback observability, and estimators. The matrix exponential plays a central role in the analysis of linear control systems, allowing a concise development of many of the key concepts for this class of models. Åström and Murray then develop and explain tools in the frequency domain, including transfer functions, Nyquist analysis, PID control, frequency domain design, and robustness. Features a new chapter on design principles and tools, illustrating the types of problems that can be solved using feedback Includes a new chapter on fundamental limits and new material on the Routh-Hurwitz criterion and root locus plots Provides exercises at the end of every chapter Comes with an electronic solutions manual An ideal textbook for undergraduate and graduate students Indispensable for researchers seeking a self-contained resource on control theory