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Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. [2] Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance. [3]
PD Pupillary distance PERRLA Pupils equal, round, reactive to light and accommodation 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 ...
A number of extensions to the USB Specifications have progressively further increased the maximum allowable V_BUS voltage: starting with 6.0 V with USB BC 1.2, [43] to 21.5 V with USB PD 2.0 [44] and 50.9 V with USB PD 3.1, [44] while still maintaining backwards compatibility with USB 2.0 by requiring various forms of handshake before ...
Rank Department State/Territory Number of full-time sworn officers As of (with reference) 1: New York City Police Department (NYPD): New York: 33,475: October 2024 [2]: 2
Mixed valence palladium complexes exist, e.g. Pd 4 (CO) 4 (OAc) 4 Pd(acac) 2 forms an infinite Pd chain structure, with alternatively interconnected Pd 4 (CO) 4 (OAc) 4 and Pd(acac) 2 units. [30] When alloyed with a more electropositive element, palladium can acquire a negative charge. Such compounds are known as palladides, such as gallium ...
In granulometry, the particle-size distribution (PSD) of a powder, or granular material, or particles dispersed in fluid, is a list of values or a mathematical function that defines the relative amount, typically by mass, of particles present according to size. [1]
PD resistor, a pull-down resistor; Pd test, the outcome of using a drop of para-phenylenediamine (also abbr. "Pd") to identify lichens; Palladium, symbol Pd, a chemical element; Photodisinfection, an alternative name for Antimicrobial Photodynamic Therapy; Point-defence, a category of weapons; Axiom of projective determinacy, in mathematical logic
It is used as a measure of the effective size of a gear. The test radius of the master, plus the test radius of the work gear is the set up center distance on a composite action test device. Test radius is not the same as the operating pitch radii of two tightly meshing gears unless both are perfect and to basic or standard tooth thickness.
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