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Early high-speed visualisations of electrical voltages were made with an electro-mechanical oscillograph, [2] [3] invented by André Blondel in 1893. These gave valuable insights into high speed voltage changes, but had a frequency response in single kHz, and were superseded by the oscilloscope which used a cathode-ray tube (CRT) as its display element.
Problem solving is the process of achieving a goal by overcoming obstacles, a frequent part of most activities. Problems in need of solutions range from simple personal tasks (e.g. how to turn on an appliance) to complex issues in business and technical fields.
Machine language is difficult to debug and not portable across different computers. [5] Initially, hardware resources were more expensive than human resources . [ 6 ] As programs became complex, programmer productivity became the bottleneck.
Space law is a relatively new field dealing with aspects of international law regarding human activities in Earth orbit and outer space. While at first addressing space relations of countries via treaties, increasingly it is addressing areas such as space commercialisation , property, liability, and other issues.
Intensive agriculture, livestock farming and industrial activities have been accompanied by a massive tourist influx (more than 20 million annual visitors), a rate of urbanization and even of major metropolisation which has led to a strong urban sprawl: two thirds of Catalans live in the urban area of Barcelona, while the proportion of urban ...