transmission density
61Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …
62Measuring instrument — Captain Nemo and Professor Aronnax contemplating measuring instruments in Twenty Thousand Leagues Under the Sea …
63Osteonecrosis of the jaw — Osteonecrosis of the jaws Classification and external resources Osteonecrosis of the jaw of the upper left jaw in a patient diagnosed with chronic venous insufficiency ICD 10 M …
64Underwater acoustics — The field of underwater acoustics is closely related to a number of other fields of acoustic study, including sonar, transduction, acoustic signal processing, acoustical oceanography, bioacoustics, and physical acoustics.HistoryUnderwater sound… …
65Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …
66Geomagnetic storm — This article is about disturbances within Earth s magnetosphere. For other uses of magnetic storm , see Magnetic storm (disambiguation). Solar particles interact with Earth s magnetosphere. A geomagnetic storm is a temporary disturbance of the… …
67Acrylic glass — chembox new ImageFile = PMMA repeating unit.svg ImageSize = 100px IUPACName = SystematicName = OtherNames = poly(methyl methacrylate) (PMMA) methyl methacrylate resin Section1 = Chembox Identifiers Abbreviations = CASNo = 9011 14 7 EINECS =… …
68Depo-Provera — is a branded progestogen only contraceptive, depot medroxyprogesterone acetate (DMPA) long acting reversible hormonal contraceptive birth control drug that is injected every 3 months. It is an aqueous suspension for depot injection of the… …
69Metamaterial — Negative index metamaterial array configuration, which was constructed of copper split ring resonators and wires mounted on interlocking sheets of fiberglass circuit board. The total array consists of 3 by 20×20 unit cells with overall dimensions …
70Noise (electronics) — Electronic noise [1] is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects. Thermal noise is… …
