High speed train communications system using free space
... interference and relative safety features [9- 13]. The latter characteristics are widely desirable in many applications (e.g. hospital, hazardous environment, aircraft cabin, etc.) where there is a restriction on the use of RF based systems. However, the eye safety is an issue and permitted transmit ...
... interference and relative safety features [9- 13]. The latter characteristics are widely desirable in many applications (e.g. hospital, hazardous environment, aircraft cabin, etc.) where there is a restriction on the use of RF based systems. However, the eye safety is an issue and permitted transmit ...
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... The interpretation of the ECEI images of the ELM filaments is not straightforward due to the marginal optical thickness in the pedestal region. The critical questions are whether the ELM filament images are localized measurements and whether the ECE intensity at the filament region depends on Te onl ...
... The interpretation of the ECEI images of the ELM filaments is not straightforward due to the marginal optical thickness in the pedestal region. The critical questions are whether the ELM filament images are localized measurements and whether the ECE intensity at the filament region depends on Te onl ...
Measurements at the Speed of Ultrasound
... greater than the speed of the compressional (longitudinal) wave in the wedge. The ultrasonic inspection frequencies are typically 1 to 10 MHz. However, if tiny flaws are to be detected, a shorter wavelength is required (similar to going from an optical microscope to an electron beam microscope for h ...
... greater than the speed of the compressional (longitudinal) wave in the wedge. The ultrasonic inspection frequencies are typically 1 to 10 MHz. However, if tiny flaws are to be detected, a shorter wavelength is required (similar to going from an optical microscope to an electron beam microscope for h ...
Waves Revision
... a vacuum and do not need a medium to travel through. • Electromagnetic waves travel fastest in a vacuum at a speed of 3 x 108 metres per second (speed of light). ...
... a vacuum and do not need a medium to travel through. • Electromagnetic waves travel fastest in a vacuum at a speed of 3 x 108 metres per second (speed of light). ...
An optical leaky wave antenna with Si perturbations inside a
... respectively. Therefore, in Sec. 6, we embed the OLWA into a FPR to achieve enhanced control of the radiation intensity and we derive closed-form formulas that parameterize the radiation in terms of the LW propagation and attenuation constants. Conclusions are reported in Sec. 7. 2. Optical leaky wa ...
... respectively. Therefore, in Sec. 6, we embed the OLWA into a FPR to achieve enhanced control of the radiation intensity and we derive closed-form formulas that parameterize the radiation in terms of the LW propagation and attenuation constants. Conclusions are reported in Sec. 7. 2. Optical leaky wa ...