pulsed sign
11Spark gap — A spark gap consists of an arrangement of two conducting electrodes separated by a gap usually filled with a gas such as air. When a suitable voltage is supplied, a spark forms, ionizing the gas and drastically reducing its electrical resistance …
12Cherry angioma — Infobox Disease Name = Cherry angioma Caption = A cherry angioma. DiseasesDB = 30744 ICD10 = ICD9 = ICD9|448.1 ICDO = OMIM = MedlinePlus = 001441 eMedicineSubj = derm eMedicineTopic = 73 MeshID = Cherry angiomas, or cherry hemangiomas, are cherry …
13Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
14Cherry hemangioma — Cherry angioma Classification and external resources A cherry angioma. ICD 9 448.1 …
15Poly(methyl methacrylate) — This article is about the transparent plastic sometimes called acrylic glass. For the glass/plastic laminate often called safety glass , see laminated glass. Poly(methyl methacrylate) …
16Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
17Acne vulgaris — This article is about a skin disease commonly found during adolescence. For other acneform skin diseases, see Acne (disambiguation). Acne vulgaris Classification and external resources …
18Indian Navy — crest Active 1947–Present Country …
19Wegener's granulomatosis — Classification and external resources Micrograph showing features characteristic of Wegener s granulomatosis a vasculitis and granulomas with multi nucleated giant cells …
20Superlens — A superlens, super lens or perfect lens is a lens which uses metamaterials to go beyond the diffraction limit. The diffraction limit is an inherent limitation in conventional optical devices or lenses.[1] In 2000, a type of lens was proposed,… …
