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In telecommunications, insertion loss is the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber and is usually expressed in decibels (dB). If the power transmitted to the load before insertion is P T and the power received by the load after insertion is P R, then the insertion loss in decibels ...
Optogenetics is a biological technique to control the activity of neurons or other cell types with light.This is achieved by expression of light-sensitive ion channels, pumps or enzymes specifically in the target cells.
The use of a flexible [intraocular lens] enables the lens to be rolled for insertion into the capsule through a very small incision, thus avoiding the need for stitches, and this procedure usually takes less than 30 minutes in the hands of an experienced ophthalmologist. After surgery, patients should avoid strenuous exercise or anything else ...
Performance of optical fiber connectors can be quantified by insertion loss and return loss. Measurements of these parameters are now defined in IEC standard 61753-1. The standard gives five grades for insertion loss from A (best) to D (worst), and M for multimode. The other parameter is return loss, with grades from 1 (best) to 5 (worst).
Path loss is a major component in the analysis and design of the link budget of a telecommunication system. This term is commonly used in wireless communications and signal propagation. Path loss may be due to many effects, such as free-space loss, refraction, diffraction, reflection, aperture-medium coupling loss, and absorption. Path loss is ...
The patient will likely experience varying vision loss and eye pain. The condition tends to be episodic. Anterior ischemic optic neuropathy is commonly known as a "stroke of the optic nerve" and affects the optic nerve head (where the nerve exits the eyeball). There is usually a sudden loss of blood supply and nutrients to the optic nerve head.
Insertion, several meanings in medicine, see ICD-10-PCS; Insertion loss, in electronics; Insertion reaction, a chemical reaction in which one chemical entity interposes itself into an existing bond of a second chemical entity (e.g.: A + B–C → B– A –C) Insertion sort, a simple computer algorithm for sorting arrays; Local insertion, in ...
Coupling loss, also known as connection loss, is the loss that occurs when energy is transferred from one circuit, circuit element, or medium to another. Coupling loss is usually expressed in the same units —such as watts or decibels —as in the originating circuit element or medium.