Results 61 to 70 of about 5,323,059 (392)

Time-Frequency Integrals and the Stationary Phase Method in Problems of Waves Propagation from Moving Sources [PDF]

, 2012
The time-frequency integrals and the two-dimensional stationary phase method are applied to study the electromagnetic waves radiated by moving modulated sources in dispersive media. We show that such unified approach leads to explicit expressions for the
Burlak, Gennadiy, Rabinovich, Vladimir
core   +3 more sources

An Enhanced Method For The Estimation Of A Doppler Frequency

, 1996
Publication in the conference proceedings of EUSIPCO, Trieste, Italy ...
M. Guitton, H. Chuberre, J. Crestel
openaire   +2 more sources

High Dynamic Range Thin‐Film Resistive Flow Sensors for Monitoring Diverse Biofluids

Advanced Functional Materials, EarlyView.
Thin‐film resistive flow sensors with thermoresistive and piezoresistive mechanisms are developed for biofluid monitoring. Fabricated using biocompatible materials and laser micromachining, the devices achieve sub‐millimeter dimensions and a broad dynamic range.
Latifah Almulla, Massimo Mariello, Christopher M Proctor   +2 more
wiley   +1 more source

Wafer‐Scale Integration of α‐quartz Thin Films toward Super High Frequency Piezoelectric bioNEMS for Chikungunya Virus Detection

Advanced Functional Materials, EarlyView.
Epitaxial piezoelectric α‐quartz/Si BioNEMS sensors, made using soft chemistry, effectively detect the Chikungunya virus. They have a mass sensitivity of 205 pg Hz−1 in liquid and can detect the virus at a limit of 9 ng mL−1. This development enables high‐frequency mass devices for point‐of‐care testing in healthcare and other electronic applications ...
Raissa Rathar, Sijie Ding, David Sanchez‐Fuentes, Claire Jolly, Charlotte André‐Arpin, Rudy Desgarceaux, Nicolas Guillaume, Gustavo Ardila, Ricardo Garcia‐Bermejo, Jaume Gazquez, Sergi Plana‐Ruiz, Laura Picas, Adrian Carretero‐Genevrier   +12 more
wiley   +1 more source

Radar High Resolution Range & Micro-Doppler Analysis of Human Motions [PDF]

, 2009
In radar imaging it is well known that relative motion or deformation of parts of illuminated objects induce additional features in the Doppler frequency spectra.
Ghaleb, A., Le Kernec, J., Nicolas, J.-M., Vignaud, L.   +3 more
core  

Gravitational waves from coalescing binaries and Doppler experiments [PDF]

, 1998
Doppler tracking of interplanetary spacecraft provides the only method presently available for broad-band searches of low frequency gravitational waves.
A. Abramovici, A. Eckart, A. G. Polnarev, A. Loeb, A. Sillanpää, A. Vecchio, A. Vecchio, Alberto Vecchio, B. Bertotti, B. Bertotti, B. Bertotti, B. F. Schutz, B. F. Schutz, B. F. Schutz, Bruno Bertotti, C. Bradaschia, C. Cutler, C. M. Gaskell, C. M. Gaskell, C. M. Will, C. M. Will, C.W. Misner, D. E. Osterbrock, D. Hils, D. Hils, E. E. Salpeter, E. Flanagan, E. Maoz, E. Maoz, E. Mauceli, E. Poisson, F. B. Estabrook, F. D. Ryan, G. B. Cook, G. Comoretto, G. Giampieri, H. D. Wahlquist, J. A. Barnes, J. D. Anderson, J. D. Anderson, J. E. Barnes, J. H. Taylor, J. H. Taylor, J. K. Blackburn, J. Kormendy, J. W. Armstrong, J. W. Armstrong, K. A. Postnov, K. Danzmann, K. S. Thorne, K. S. Thorne, K. S. Thorne, K. Tsubono, L. Blanchet, L. Blanchet, L. Blanchet, L. Blanchet, L. Blanchet, L. E. Kidder, L. E. Kidder, L. E. Kidder, L. L. Smarr, L. Valtoja, Luciano Iess, M. C. Begelman, M. G. Haehnelt, M. Haehnelt, M. J. Rees, M. J. Rees, M. J. Rees, M. Miyoshi, M. Shibata, M. Tinto, M. Tinto, N. Roos, N. Roos, P. Astone, P. Astone, P. C. Peters, P. L. Bender, R. A. Hulse, R. D. Blandford, R. P. van der Marel, R. R. Caldwell, R. W. Hellings, S. Mikkola, S. Sigurdsson, S. Smith, S. Tremaine, T. A. Apostolatos, T. Damour, U. Fritze–von Alvensleben, V. M. Lipunov, V. M. Lipunov, Y. B. Zel’dovich   +94 more
core   +2 more sources

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source

What is Doppler ultrasound? [PDF]

, 2011
The term Doppler should be capitalized because it refers to Christian Johann Doppler, an Austrian physicist (1803–1853). He described a phenomenon whereby the frequency of sound changes when it is reflected off a moving object.
Vassallo, Pierre
core  

Nonlinear magneto-optical rotation of frequency-modulated light resonant with a low-J transition [PDF]

, 2003
A low-light-power theory of nonlinear magneto-optical rotation of frequency-modulated light resonant with a J=1->J'=0 transition is presented. The theory is developed for a Doppler-free transition, and then modified to account for Doppler broadening and ...
B. Cheron, B. Cheron, C. Andreeva, D. Budker, D. Budker, D. Budker, D. Budker, D. Budker, D. Budker, D. F. Kimball, E. B. Aleksandrov, E. B. Alexandrov, H. Gilles, L. M. Barkov, L. M. Barkov, M. P. Auzin’sh, M. V. Romalis, M. V. Romalis, P. Valente, S. M. Rochester, V. V. Yashchuk, V. V. Yashchuk, W. Bell, Yu. P. Malakyan   +23 more
core   +1 more source

A Digital Multigate Doppler Method for High Frequency Ultrasound [PDF]

Sensors, 2014
Noninvasive visualization of blood flow with high frequency Doppler ultrasound has been extensively used to assess the morphology and hemodynamics of the microcirculation. A completely digital implementation of multigate pulsed-wave (PW) Doppler method was proposed in this paper for high frequency ultrasound applications. Analog mixer was eliminated by
Qiu, W, Ye, Z, Yu, Y, Chen, Y, Chi, L, Mu, P, Li, G, Wang, C, Xiao, Y, Dai, J, Sun, L, Zheng, H   +11 more
openaire   +5 more sources