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High PRF is limited to systems that require close-in performance, like proximity fuses and law enforcement radar. For example, if 30 samples are taken during the quiescent phase between transmit pulses using a 30 kHz PRF, then true range can be determined to a maximum of 150 km using 1 microsecond samples (30 x C / 30,000 km/s).
[7] [8] [4] Eye drops containing 0.1% dipivefrine have similar effectiveness to conventional eye drops containing 2% epinephrine in lowering intraocular pressure. [4] Dipivefrine is used pharmaceutically mainly as the hydrochloride salt. [14] [10] A similar compound that was never marketed is pivenfrine, which is the 3-pivalate ester of ...
PH Pinhole see Pinhole occluder and Visual_acuity#Legal_definitions: PHNI Pinhole No Improvement see Pinhole occluder and Visual_acuity#Legal_definitions: PHVA Pinhole Visual Acuity: PL Perception of light POH / PrOH Previous ocular history PPA Peri-papillary atrophy Pt Patient RAPD Relative afferent pupillary defect OD Right eye (oculus dexter ...
The received signals from multiple PRF are compared using the range ambiguity resolution process. Each range sample is converted from time domain I/Q samples into frequency domain. Older systems use individual filters for frequency filtering.
The Nyquist frequency will also change when the PRF is changed. This is explained best using an example with 2 different PRF, although real systems use a different method. In the example, PRF A can detect true speed up to 600MPH and PRF B can detect true speed up to 500MPH.
An eye wash station in a laboratory Eyewash is a fluid, commonly saline , used to physically wash the eyes in the case that they may be contaminated by foreign materials or substances. Eyewashes may be beneficial to those with sensitive eyes and can provide relief to the painful side effects of sensitivity.
Acid number (the proportional content of acid, not pH) and particulate contamination must be monitored while using Skydrol, and generally hydraulic systems should be sampled every C check. [2] Generally recommended contamination levels should be better than AS4059 Class 7 as new, and should not be allowed to degrade beyond Class 9.
In aqueous solutions, redox potential is a measure of the tendency of the solution to either gain or lose electrons in a reaction. A solution with a higher (more positive) reduction potential than some other molecule will have a tendency to gain electrons from this molecule (i.e. to be reduced by oxidizing this other molecule) and a solution with a lower (more negative) reduction potential ...