Dependence on frequency shifts of the CO2/OsO4 laser with an external interferometer from the higher modes of radiation

2006 ◽  
Author(s):  
S. Yu. Otrokhov
Keyword(s):  
Frequency Shifts ◽  
Higher Modes

scholarly journals Patch antenna sensor for wireless ice and frost detection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ryan Kozak ◽  
Kasra Khorsand ◽  
Telnaz Zarifi ◽  
Kevin Golovin ◽  
Mohammad H. Zarifi
Keyword(s):  
Resonant Frequency ◽  
Patch Antenna ◽  
Wide Band ◽  
Power Lines ◽  
Ice Thickness ◽  
Ice Accretion ◽  
Robust Method ◽  
Frequency Shifts ◽  
Resonant Amplitude ◽  
Recorded Data

AbstractA patch antenna sensor with T-shaped slots operating at 2.378 GHz was developed and investigated for wireless ice and frost detection applications. Detection was performed by monitoring the resonant amplitude and resonant frequency of the transmission coefficient between the antenna sensor and a wide band receiver. This sensor was capable of distinguishing between frost, ice, and water with total shifts in resonant frequency of 32 MHz and 36 MHz in the presence of frost and ice, respectively, when compared to the bare sensor. Additionally, the antenna was sensitive to both ice thickness and the surface area covered in ice displaying resonant frequency shifts of 2 MHz and 8 MHz respectively between 80 and 160 μL of ice. By fitting an exponential function to the recorded data, the freezing rate was also extracted. The analysis within this work distinguishes the antenna sensor as a highly accurate and robust method for wireless ice accretion detection and monitoring. This technology has applications in a variety of industries including the energy sector for detection of ice on wind turbines and power lines.

scholarly journals Behavior, size, and body condition predict susceptibility to management and reflect post-treatment frequency shifts in an invasive snake

2020 ◽  
Vol 21 ◽  
pp. e00834
Author(s):  
Melia G. Nafus ◽  
Amy A. Yackel Adams ◽  
Scott M. Boback ◽  
Shane R. Siers ◽  
Robert N. Reed
Keyword(s):  
Body Condition ◽  
Post Treatment ◽  
Frequency Shifts ◽  
Treatment Frequency

scholarly journals The contribution of chemical exchange to MRI frequency shifts in brain tissue

2010 ◽  
Vol 65 (1) ◽  
pp. 35-43 ◽  
Author(s):  
Karin Shmueli ◽  
Stephen J. Dodd ◽  
Tie-Qiang Li ◽  
Jeff H. Duyn
Keyword(s):  
Brain Tissue ◽  
Chemical Exchange ◽  
Frequency Shifts

Doppler-like frequency shifts generated by dynamic scattering

1990 ◽  
Vol 146 (4) ◽  
pp. 167-171 ◽  
Author(s):  
Daniel F.V. James ◽  
Emil Wolf
Keyword(s):  
Frequency Shifts ◽  
Dynamic Scattering
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