The fourth edition of this book which is highly recommended for students, teachers and technicians. Updated to cover all the latest developments in this field with many new articles and illustrations.
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A substance that conducts electricity when in solution or when molten because of its dissociation into ions. Strong electrolytes are compounds, such as mineral acids, that are completely dissociated into ions when in solution. Weak electrolytes are compounds that are only partially dissociated in solution. Weak solutions of such compounds are better conductors than strong solutions because of their greater degree of dissociation.
Syn. thermography. Producing an image of an object by means of the infrared radiation emitted by it. A camera tube with a suitable lens system may be used to produce the image. Thermal imaging does not require any external source of illumination and is used to produce images in the dark, for example at night. It is also used for diagnostic purposes to discover any areas of the body that have an unusual temperature distribution.
Abbrev. for random-access memory. A solid-state memory device which allows reading and writing of data and to which there is random access to the individual memory locations. The memory is arranged as a rectangular array of memory cells forming rows and columns. Each memory cell in the array forms an intersection between the rows and columns. Any individual cell in the array is defined by the address of one row and one column, since each row and column intersect once only. Each cell can store one bit of information. In order to retrieve information from a particular location, the address codes of the row and column are specified. The output is sampled by suitable sensing devices that are attached to each row and the rows are therefore termed bit lines. The columns are known as word lines.
Professor David Howard is head of the Media Engineering Research Group in the Department of Electronics at the University of York. He is a Fellow of the Institute of Electrical Engineering and lives in York.
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Book Description Penguin Canada Inc, 2005. Paperback. Book Condition: New. 4. Bookseller Inventory # DADAX0141013974
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