emitting area
31Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …
32London congestion charge — At Old Street, street markings and a sign (inset) with the white on red C alert drivers to the charge. The sign displays the original operating hours for the scheme …
33Display device — Nixie tubes, LED display and VF display, top to bottom. A display device is an output device for presentation of information in visual or tactile form (the latter used for example in tactile electronic displays for blind people). When the input… …
34Physical 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… …
35radiation measurement — ▪ technology Introduction technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement. The term ionizing radiation refers to those… …
36Lighting — Not to be confused with lightning. For other uses, see lighting (disambiguation). Low intensity lighting and haze in a concert hall allows laser effects to be visible …
37radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
38Nobel 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,… …
39Movie projector — This article is concerned with technical aspects of moving film projection. For non film movie projection, see digital cinema. For historical aspects, see the article history of cinema. 35 mm movie projector in operation …
40Split-flap display — Flap display as departure board in Hannover railway station, Germany …
