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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).
Near point of convergence or no previous correction NRC Normal retinal correspondence NV Near vision NWT Normal wearing time o symptoms Zero symptoms Φ Horizontal orthophoria θ Vertical orthophoria ⊕ Horizontal and vertical orthophoria OC's Optical centres Occ. Occupation OD oculus dexter (right eye) OH Ocular history OMB Oculo motor balance
A 2016 analysis of emergency department visits from 2010 to 2013 reported over 36,000 visits annually for chemical burns to the eye, with a median age at presentation of 32 years. [4] By individual year of age, 1- and 2-year-old children have the highest incidence of these injuries, with rates approximately 50% higher than the highest-risk ...
Figure 1.0 - Basic anatomical features of the human eye. Ophthalmic drug administration is the administration of a drug to the eyes, most typically as an eye drop formulation. Topical formulations are used to combat a multitude of diseased states of the eye. These states may include bacterial infections, eye injury, glaucoma, and dry eye. [1]
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Some types of measurements introduce an unavoidable modulo operation in the measurement process. This happens with all radar systems. [1]Radar aliasing happens when: . Pulse repetition frequency (PRF) is too low to sample Doppler frequency directly
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Hexafluoro-2-propanol has very low acute toxicity, hence its use as a precursor to anesthetics. Although it has low acute toxicity, it is a strong irritant to skin and eyes. [2] Animal experiments show possible adverse effects on fertility, [10] placing HFIP as a reproductive toxicity category 2 material. [11]