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Macleans

CANDU Flawed

This article was originally published in Maclean’s magazine on August 25, 1997. Partner content is not updated.

In the belly of the nuclear beast, the massive domes of the reactors rise ominously to a height of more than 45 m, their radioactive interiors visible only through the thick windows of airlocks.

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Mineral Resources

Minerals are naturally-occurring, homogeneous geological formations. Unlike fossil fuels, such as coal, oil and natural gas, minerals are inorganic compounds, meaning they are not formed of animal or plant matter.

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Tantalum

Tantalum (Ta) is a grey, heavy, very hard metal with a high melting point (2996°C). When pure, it is ductile and can be easily fabricated. Tantalum has good rectifying properties (ie, converts alternating to direct current) and dielectric properties (ie, does not conduct direct current).

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Transportation

The importance of transportation to a trading nation as vast as Canada cannot be underestimated. The great distances between mines, farms, forests and urban centres make efficient transport systems essential to the economy so that natural and manufactured goods can move freely through domestic and international markets. Transportation has and will continue to play an important role in the social and political unity of Canada.

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Bioethics

The word bioethics is formed from the Greek word for life (bios) and the traditional word for the systematic study of right conduct (ethics).

Macleans

Gates Under Siege

They came by the thousands last week, a ragtag army of pasty-faced computer geeks in sandals and T-shirts, streaming into the San Jose Convention Center in California's Silicon Valley to honour the 29-year-old hacker from Helsinki who might just be the one to dethrone Bill Gates.

Macleans

Blackout Hits Ontario and Seven US States

This article was originally published in Maclean’s magazine on August 25, 2003. Partner content is not updated.

IT TOOK just nine seconds to turn the clock back a century. A voltage fluctuation in some Ohio transmission lines. Then, at 4:11 p.m. n a muggy August Thursday, a faster-than-you-can-blink reversal in the flow of current, suddenly sucking away a city's worth of power from the eastern half of the continent.

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Royal Commission on Energy

The Royal Commission on Energy (Borden Commission) was established (1957) by the government of John DIEFENBAKER under chairman Henry BORDEN, the president of Brazilian Traction, Light and Power Co, Ltd, to investigate "a number of questions relating to sources of energy.

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Chemistry

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.

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Technical Education

From its origins in manual training "shop" and industrial arts, technical education has consisted of practical and applied subject matter that reflects the practices of current society.

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Stress

Stress was originally viewed as an overpowering external force acting upon individuals or objects. The mechanical engineer still uses the word in this sense, but human biologists have been less consistent in their terminology.

Macleans

Nasa's Columbia Shuttle Disaster

This article was originally published in Maclean’s magazine on February 10, 2003. Partner content is not updated.

FOR LONG MINUTES, the crowd of family, friends, dignitaries and spectators stood at the end of the airstrip in Cape Canaveral, Fla., waiting and hoping for a familiar white speck in the distant blue sky. By the time the countdown clock reached zero, it was clear the reunion would never come.

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Multimedia Communications

Multimedia is the combined use of several media, such as video, graphics, sound, lighting and text for the purpose of education or entertainment. More specifically, it refers to the use of digitized media displayed on a computer.

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Talc

Talc is a mineral composed of 31.7% magnesium oxide (MgO), 63.5% silicon dioxide (SiO2) and 4.8% water. It is formed by the alteration of dolomite or ultramafic IGNEOUS rocks. A formula for pure talc would look like this: 3 dolomite + 4 quartz + 1 water = 1 talc + 3 calcite + 3 CO2.

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Silviculture

Silviculture is the branch of FORESTRY that deals with establishing, caring for and reproducing stands of trees for a variety of forest uses including wildlife habitat, timber production and outdoor recreation.

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