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Two National Instruments boards are used for instrument control and data acquisition with custom-written LabVIEW algorithms: a PCI 6030E board with an upper frequency limit of 100 kS s−1 for signal generation and data acquisition and a PCI 6703 board to align the lasers and to modulate the flow into the cell by controlling solenoid valves.
On another occasion a magnetospheric response to heater turning on and off was found from magnetic pulsation observations over a frequency range up to 5 Hz (the upper frequency limit of the sensitive magnetometer at Kilpisjarvi, located near Tromsø).
There is no slope detected beyond 0.4 Hz and therefore 0.4 Hz is the upper frequency limit of Fig. 9.
Considering that knee frequency defines the upper frequency limit of the resistive behavior and a capacitive one at lower than knee frequencies, it is inferred that the PPy nanotube sheath structure is more capacitive in nature.
This resonance appears to occur, perhaps coincidentally, at about half the upper frequency limit of hearing in each of these cases.
This is compatible with characteristics of the PVDF-foil, which owing to its thickness of 110 µm has an upper frequency limit of about 9 MHz [ 20].
Similar(51)
This is achieved by requiring photonic crystal designs with bandgaps well below a fundamental upper frequency limit for leakage-free guidance of light related to the properties of the media above/below the finite-height photonic crystal waveguide.
The main aim is to obtain quantitative data showing what upper frequency limit a practical implementation of this strategy is likely to yield.
The upper frequency limit is determined by the sampling frequency of 65 kHz.
The data was processed using a band pass filter with lower frequency limit of 250 kHz and upper limit of 10 MHz.
To maintain the frequency stability, the upper/lower frequency limit of the GB power system is 49.5/50.5 Hz [11].
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