In this paper a new beamforming method appropriate especially for airborne ultrasonics is presented. The method is based on nonlinear filtering technique called Order Statistic filtering. By exploiting the proposed method we are able to implement ultrasonic range sensing system, for example, for mobile robot applications. The proposed sensing system gives the time-of-flight based distance measu...

References BURTON, C. & JOHNSON, J. (1970) Multiple cerebral aneurysms and cardiac tumours. New English Journal of Medicine, 282, 35. DAVIS, E. (1970) Criterion for diagnosis of rheumatic fever. Lancet, i, 1043. EDLER, I. & HERTZ, C.H. (1954) The use of ultra-sound reflectoscope for the continuous recording of heart walls. Kungliga Fysiografifk Sallskapts i Lund. Forhandlingar, 24, 5. EFFERT, S...

Gaining access to a prototype motion capture suit designed by the Animazoo company, the Interactive Systems group at the University of Sussex have been investigating application areas. This paper describes our initial experiments in mapping the suit control data to sonic attributes for musical purposes. Given the lab conditions under which we worked, an agile design cycle methodology was employ...

---------------------------ABSTRACT----------------------------The potential of employing ultrasonic waves to detect sealworms embedded deep in the fish musculature was demonstrated. Images were made of sealworm-infested cod by using both the scanning laser acoustic microscopic technique, as well as the pulse-echo technique at 10 MHz, Also, attenuation of ultrasound in the frequency range from ...

D URING the past decade there has been an increasing recognition and acceptance of the value and capabilities of diagnostic ultrasonography as an important addition to the armamentarium of medical diagnostic procedures. Echoen-cephalography for the determination of the position of the diencephalic midline brain structures has an established position as a favorable standard procedure in many hos...

We investigate the application of artificial neural networks (ANNs) to the classification of spectra from impact-echo signals. In this paper we provide analyses from simulated signals and the second part paper details results of lab experiments. The data set for this research consists of sonic and ultrasonic impact-echo signal spectra obtained from 100 3D-finite element models. These spectra, a...

OBJECTIVE Sonic hedgehog is produced in gastric epithelial cells and plays a crucial role in parietal cell function and the regulation of gastric epithelial cell differentiation. Emerging evidence suggests that the sonic hedgehog pathway is not only involved in the development of cancers but also in their progression and aggressiveness. METHODS To assess its prognostic value in gastric cancer...

The red piranha, Pygocentrus nattereri, produces sounds by rapid contractions of a pair of extrinsic sonic muscles. The detailed innervation pattern of the sonic muscle of the red piranha was investigated. The sonic muscle is innervated by branches (sonic branches) of the third (S3so), fourth (S4so), and fifth (S5so) spinal nerves. The average total number of nerve fibers contained in the right...