pulse form
81Radar signal characteristics — A Radar System uses a Radio Frequency electromagnetic signal reflected from a target to determine information about that target. In any radar system, the signal transmitted and received will exhibit many of the characteristics described below.The …
82X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …
83Vector soliton — Among all the soliton considered, the optical soliton draws the most attention as it is possible to generate ultrafast pulses and has wider application. optical soliton can be classified as two groups:temporal soliton and spatial soliton.however …
84Synthetic aperture radar — (SAR) is a form of radar in which the highly directional (and thus very large) rotating antenna used by conventional radar is replaced with many low directivity small stationary antenna positions scattered over some area near or around the target …
85Huangdi Neijing — read Huangdi Neijing (simplified Chinese: 黄帝内经; traditional Chinese: 黃帝內經; pinyin: Huángdì Nèijīng), also known as The Inner Canon of Huangdi or Yellow Emperor s Inner Canon, is an ancient Chinese medical text that has been treated as the… …
86medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
87Laser: Laserstrahlung und Aufbau eines Lasers — Auch wenn der Laser mittlerweile ein vielen Menschen vertrauter Begriff ist, sind doch wenigen die physikalischen Grundlagen seiner Funktion bekannt. Begriffe wie »Besetzungsinversion« oder »stimulierte Emission« werden bisweilen gebraucht,… …
88Nuclear magnetic resonance — This article is about the physical phenomenon. For its use as a method in spectroscopy, see Nuclear magnetic resonance spectroscopy. NMR redirects here. For other uses, see NMR (disambiguation). First 1 GHz NMR Spectrometer (1000 MHz,… …
89Radiation chemistry — is a subdivision of nuclear chemistry which is the study of the chemical effects of radiation on matter; this is very different from radiochemistry as no radioactivity needs to be present in the material which is being chemically changed by the… …
90Shock collar — The term shock collar is used to describe an electronic training aid developed to deliver an electrical signal through contact points attached to a dog collar. While similar systems are available for other animals, the most common are the collars …
