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As far as is known today, only fish, in the entire animal kingdom, possess special organs which produce an electric field. For several dozens of years now, many scientists have been interested in the biological significance of th is electric field. Particularly important was Lissrnann's discovery of the fact that the socalIed "weakly" electric fish, the discharges of which are not sensitive to man and were therefore unknown until now, use the electric field to locate objects in their environment. Many questions arose which had their origins in this discovery. What are the biological basis for...

Verbittert erduldet der namenlose Schuhputzer Suha Vratas ein Dasein, das man bestenfalls als Qual bezeichnen kann, bis ein schiffbrüchiges Roma-Quartett im Port der Stadt strandet.
Die Neuankömmlinge bringen einen Stein ins Rollen, der den Schuhputzer beinahe Kopf und Kragen kostet.
Schließlich verliert dieser bei einer nächtlichen Verfolgungsjagd den Boden unter den Füßen und stürzt in eine tiefe Grube, aus der es kein Entrinnen gibt. Dem Tode nahe, durchlebt er in Träumen die Vergangenheit von Stadthonoratioren und Wegbegleitern. Das Leben der Zigeunerin D'Artagnan wird ihm...

Diagnostic Ultrasound Imaging provides a unified description of the physical principles of ultrasound imaging, signal processing, systems and measurements. This comprehensive reference is a core resource for both graduate students and engineers in medical ultrasound research and design. With continuing rapid technological development of ultrasound in medical diagnosis, it is a critical subject for biomedical engineers, clinical and healthcare engineers and practitioners, medical physicists, and related professionals in the fields of signal and image processing.

The book...

Essentials of Ultrasound Imaging is an introduction to all aspects of acquiring and measuring pulse-echo data to form images. The book provides in-depth exploration of key physical processes, including wave propagation and interaction with physical media, piezoelectric transducers, arrays, and beam formation, and concludes with a survey of advanced topics in ultrasound. Uniquely, principles are revealed by examples from software simulation programs designed to demonstrate ultrasound concepts, and image and signal processing. There are also numerous examples from a Verasonics Vantage Research...