scanning is performed when a pulse comes

  • 1 Mathematics 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… …

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  • 2 Weather radar — in Norman, Oklahoma with rainshaft …

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  • 3 Medical ultrasonography — This article is about using ultrasound to image the human body. For imaging of animals in research, see Preclinical imaging. Sonography redirects here. For the tactile alphabet called sonography , see Night writing. Medical ultrasonography… …

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  • 4 3D scanner — A 3D scanner is a device that analyzes a real world object or environment to collect data on its shape and possibly its appearance (i.e. color). The collected data can then be used to construct digital, three dimensional models useful for a wide… …

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  • 5 diagnosis — /duy euhg noh sis/, n., pl. diagnoses / seez/. 1. Med. a. the process of determining by examination the nature and circumstances of a diseased condition. b. the decision reached from such an examination. Abbr.: Dx 2. Biol. scientific… …

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  • 6 analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …

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  • 7 Nobel Prizes — ▪ 2009 Introduction Prize for Peace       The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …

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  • 8 Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …

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  • 9 motion-picture technology — Introduction       the means for the production and showing of motion pictures. It includes not only the motion picture camera and projector but also such technologies as those involved in recording sound, in editing both picture and sound, in… …

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  • 10 spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …

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  • 11 History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …

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  • 12 radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …

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  • 13 Telecine — For a television network in Brazil, see Rede Telecine. Telecine (  /ˈtɛl …

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  • 14 Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …

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  • 15 Methods of detecting extrasolar planets — Any planet is an extremely faint light source compared to its parent star. In addition to the intrinsic difficulty of detecting such a faint light source, the light from the parent star causes a glare that washes it out. For those reasons, only a …

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  • 16 Flip-flop (electronics) — An SR latch, constructed from a pair of cross coupled NOR gates. Red and black mean logical 1 and 0 , respectively. In electronics, a flip flop or latch is a circuit that has two stable states and can be used to store state information. The… …

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  • 17 Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… …

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  • 18 Directed-energy weapon — This article is about practical experiments with energy weapons. For fictional uses, see raygun. Humvee with Active Denial System mounted A directed energy weapon (DEW) emits energy in an aimed direction without the means of a projectile. It… …

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  • 19 Subarachnoid hemorrhage — ICD9|852.0 ICD9|852.1 ICDO = OMIM = 105800 MedlinePlus = 000701 eMedicineSubj = med eMedicineTopic = 2883 eMedicine mult = eMedicine2|neuro|357 eMedicine2|emerg|559 MeshID = D013345 Subarachnoid hemorrhage (SAH, pron en|ˌsʌbəˈræknɔɪd ˈhɛm(ə)rɪdʒ) …

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  • 20 Robot — This article is about mechanical robots. For other uses of the term, see robot (disambiguation). For software agents, see Bot. ASIMO (2000) at the Expo 2005, a humanoid robot …

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