New Publications are available for Computer software
http://dl-live.theiet.org
New Publications are available now online for this publication.
Please follow the links to view the publication.What EMC is, and some examples of EMC problems caused by software
http://dl-live.theiet.org/content/conferences/10.1049/ic_19980835
EMC is an acronym for Electromagnetic Compatibility, and before we can understand how software can cause EMC problems we first need to be clear about what EMC is. Products and systems which use electricity and/or electronics are said to be Electromagnetically Compatible when their emissions do not cause unacceptable interference with other electrical and/or electronic products and systems, and when they have sufficient immunity to operate as required in their electromagnetic environment. The tiny electrical charges or magnetic states, used to represent stored programs or data, are easily corrupted by electromagnetic pollution in their environment. However, in addition, digital bits being communicated on conductors can be also be corrupted by a number of continuous or transient electromagnetic phenomena. The instruction to read what is stored at memory location 077F can result in program corruption when an interfering event causes 177F (or any other location) to be read instead. (10 pages)Globalisation of software supply and demand
http://dl-live.theiet.org/content/journals/10.1049/sej.1994.0032
During the mainframe era, software grew to become a major factor of business, government and military operations. Mainframe software development favoured the industrialised nations such as the United States because of the high levels of investment needed for the mainframe computers themselves, and also because of the specialised data centres, cooling systems and power supplies that mainframes required. Personal computers and industrial microcomputers are changing the situation dramatically. The capital investment required to supply a programming staff with personal computers is almost trivial. Software development in the future can be carried out almost anywhere in the world. Software is a comparatively ‘green’ industry that is not harmful to the environment and uses little in the way of natural resources. Many countries are now entering the commercial software domain, and this trend should accelerate in the 21st century. Software usage and consumption are also expanding rapidly on a global basis.Software distribution via broadcast television signals
http://dl-live.theiet.org/content/journals/10.1049/el_19850316
A method is described for the transmission of software and digital data at rates of multiples of 500 baud as part of a broadcast television signal. Unlike teletext-based systems, this method enables signals to be recorded on a domestic video recorder for subsequent decoding. The receiver interface is also much simpler, consisting of low-cost, commonplace components in a configuration which can be assembled by novices.