Contraception, see BIRTH CONTROL.
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Contraception, see BIRTH CONTROL.
The Conestoga wagon was a large wagon, with broad wheels and a white hemp or canvas cover, used for the transportation of persons and goods across the North American continent prior to the introduction of the railway in the
Like most modern communication technologies, the computer had its origins in the military.
Communications technologies include the techniques, tools and methods used to facilitate communication. Information technologies include those used to create, record, modify and display the content being communicated.
Chalk River Nuclear Laboratories, see Nuclear research establishments.
Research may focus on a variety of topics. Mass media are studied for the content of their programs, the way those programs are produced and the impact of various influences on programming. Media economic structure and the media's role in political life are also topics of research.
During the 1950s, 4 main areas of focus emerged. "Hardware" concentrated on the construction of reliable equipment with faster central-processing units (CPUs), larger memories and more input and output devices to solve increasingly ambitious problems.
MATHEMATICS spawned the computer in the 1940s and gave it its name. Its first application was the computation of theoretical ballistic tables for traditional bombs, but calculations for the atomic bomb and then for guided missiles soon became the driving force for computer development.
Before the multiplication of engineering disciplines in the late 19th and early 20th centuries, engineers were either military or civilian. Civilian engineers built nonmilitary structures; those in the military concentrated on FORTIFICATIONS.
Environment Canada devised the climate severity index to rate a locality's climate according to human comfort and well being. The index has a range from 1 to 100, with a score of 1 representing the least severe climate and 100 the most.
The study of modern climatology is primarily global in perspective. The main tools used by climatologists are computer models of the atmosphere, ocean and land surface, and data inferred from SATELLITE observations.
Chemical manufacturing entails the conversion of one material to another by a chemical reaction on a commercial scale. The starting material (feedstock) can be a natural substance or a relatively pure chemical used as an "intermediate" for subsequent upgrading.
Chemical engineering is the technology of scaling up to commercial size chemical reactions which have been demonstrated in the laboratory.
Chemistry, the science concerned primarily with the structure and properties of matter and with the transformation of one form of matter into another. Now one of the most theoretically and methodologically sophisticated sciences, chemistry had its beginnings in medieval alchemy.
Early chemistry was principally analytical in nature; only as the body of experimental data increased did the present-day specialities evolve. The principal chemical subdisciplines are analytical, inorganic, organic and physical chemistry.
Food poisoning includes intoxication and infection resulting from consumption of foods contaminated by toxins (poisons) produced by specific micro-organisms, or the presence of infectious micro-organisms, heavy-metal contaminants (eg, copper) or natural toxins.
What is distinctive about communications in Québec is the existence of 2 often competing media serving different cultures and, above all, the ways in which francophone media have expressed or reinforced the character of French Canada.
Computer-Assisted Learning is an encompassing term which generally refers to 3 major uses of computers in education and training.
Canadian Geographic is the bimonthly magazine of the Royal Canadian Geographical Society (RCGS), which was founded in 1929 under stimulus from geologist Charles CAMSELL and explorer Joseph B. TYRRELL, who served as the society's first honorary president.