Search

Your search keyword '"Pucci, E."' showing total 11 results
Start Over Author "Pucci, E." Publisher elsevier b.v.
11 results on '"Pucci, E."'

5. Doppler study of precordial musical murmurs

Author

Pennestri, F., Boccardi, L., Minardi, G., Di Segni, M., Pucci, E., Biasucci, L.M., Ferrari, O., Lombardo, A., Giovannini, E., and Loperfido, F.

Subjects
Heart murmurs -- Diagnosis, Doppler ultrasonography -- Usage, Heart valves, Cardiography -- Usage, Health
Abstract

Sixty-two patients with either musical (periodic, harmonic patterns) or noisy heart murmurs were examined. The murmurs were recorded by phonocardiography, which graphically records heart sounds and murmurs. Patients were also evaluated with Doppler ultrasound, an imaging and evaluation technique using sound waves. Using Doppler, the musical murmurs were all found to be caused by valvular regurgitation, a backward flow of blood through heart valves due to imperfect valves. When the Doppler probe was placed two centimeters away from the sound's origin, the signal disappeared. Doppler ultrasonography can identify the source of musical murmurs. This technique has shown that musical murmurs are usually caused by a vibrating structure.

Published
1989

6. Design of Micromachined Ridge Gap Waveguides for Millimeter-Wave Applications.

Author

Rahiminejad, S., Zaman, A.U., Pucci, E., Raza, H., Vassilev, V., Haasl, S., Lundgren, P., Kildal, P.-S, and Enoksson, P.

Abstract

Abstract: The ridge gap waveguide is a new transmission line for millimeter-wave applications. Traditionally, rectangular waveguides are used for those applications due to their low loss. However their fabrication requires precision machining, very good electrical contact and alignment between two joining mechanical parts. Ridge gap waveguides can obtain similar performance without requiring conductive sidewalls and this provides more freedom during the fabrication and assembly process as the structure is no longer sensitive to small gaps between the side walls and the upper lid. The ridge gap waveguide has already been validated for 10-20GHz using conventional fabrication methods. The ridge gap waveguide prototypes presented in this paper are designed to work in the frequency region between 210 and 340GHz, and fabricated using MEMS technology. MEMS technology provides fabrication precision of the structures and thus opens the path for high-frequency components. [Copyright &y& Elsevier]

Published
2012
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results