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The ultrasound velocity tomography allows measurement of cardiac geometries for various phases in the cardiac cycle. The present tomograph makes reconstruc tions at intervals of 20 ms. Because of a lack of clear (intramural) landmarks (except the roots of the papillairy muscle), it is difficult to pinpoint spatial trajectories of particular points in the heart. Therefore, a second method was developed of injecting radiopaque markers in the heart and following their motion patterns during the cardiac cycle with help of a biplane X-ray equipment. The data obtained with both methods can be implemented in our finite element model of the heart to compute intramural stresses and strains. The resul...
In recent years there has been a growth in interest in studying the heart from the perspective of the physical sciences: mechanics, fluid flow, electromechanics. This volume is the result of a workshop held in July 1989 at the Institute for Nonlinear Sciences at the University of California at San Diego that brought together scientists and clinicians with graduate students and postdoctoral fellows who shared an interest in the heart. The chapters were prepared by the invited speakers as didactic reviews of their subjects but also include the structure, mechanical properties, and function of the heart and the myocardium, electrical activity of the heart and myocardium, and mathematical models of heart function.
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Some fifty thousand Soviets visited the United States under various exchange programs between 1958 and 1988. They came as scholars and students, scientists and engineers, writers and journalists, government and party officials, musicians, dancers, and athletes—and among them were more than a few KGB officers. They came, they saw, they were conquered, and the Soviet Union would never again be the same. Cultural Exchange and the Cold War describes how these exchange programs (which brought an even larger number of Americans to the Soviet Union) raised the Iron Curtain and fostered changes that prepared the way for Gorbachev's glasnost, perestroika, and the end of the Cold War. This study is based upon interviews with Russian and American participants as well as the personal experiences of the author and others who were involved in or administered such exchanges. Cultural Exchange and the Cold War demonstrates that the best policy to pursue with countries we disagree with is not isolation but engagement.
The first full biography of the fearless and brilliant Maria Yudina, a legendary pianist who was central to Russian intellectual life Maria Yudina was no ordinary musician. An incredibly popular pianist, she lived on the fringes of Soviet society and had close friendships with such towering figures as Boris Pasternak, Pavel Florensky, and Mikhail Bakhtin. Legend has it that she was Stalin’s favorite pianist. Yudina was at the height of her fame during WWII, broadcasting almost daily on the radio, playing concerts for the wounded and troops in hospitals and on submarines, and performing for the inhabitants of besieged Leningrad. By the last years of her life, she had been dismissed for ideological reasons from the three institutions where she taught. And yet according to Shostakovich, Yudina remained “a special case. . . . The ocean was only knee-deep for her.” In this engaging biography, Elizabeth Wilson sets Yudina’s extraordinary life within the context of her times, where her musical career is measured against the intense intellectual and religious ferment of the post-revolutionary period and the ensuing years of Soviet repression.
We are extremely pleased that all of the chapters in this volume provide up-to-date information on a variety of topics of interest to scientists working on membrane biology. As in the past, we have attempted to expedite the transition from submission of the manuscripts to publication in order to make the reviews as timely as possible. Cell biology and molecular biology are increasingly be coming concerned with the study of structural elements in cells and their assem bly. The rules which govern membrane synthesis, assembly and interaction of membrane components with other cellular elements, notably the cytoskeleton, are at the center of research in these fields. We will continue in subsequen...