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Posted by admin in Health, Physics & Maths, Science in Society on 19. Feb, 2010 | No Comments
In the latest Quest
HIV: who would have thought…
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I used to think of HIV/AIDS as something that is very far removed from me and I don’t personally know anybody who is living with HIV. By Gillian Arendse.
This naive view of my lived experience was changed during my years as a lecturer. I was asked -
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Posted by admin in Environment, Featured, Life, Science in Society on 19. Feb, 2010 | No Comments
In the latest Quest
What happens to man-made CO2 emissions?
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Carbon dioxide is the most important of the Greenhouse gases man produces – but have you ever wondered what happens to it all? By Mike Lucas
Scientists are now almost 100% certain that greenhouse gases such as CO2 produced from burning coal, oil and natural gas -
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Posted by admin in Environment, Featured, Science in Society on 19. Feb, 2010 | No Comments
In the latest Quest
Forestry and rural development
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Most forests are in rural areas. Cori Ham explains how forestry can play a role in rural development.
The impact of forests on people is well recognised with more than 1 billion people worldwide depending on forests for their livelihoods. We know that forests offer numerous benefits to -
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Posted by admin in Biology, Featured, Science in Society, Technology on 19. Feb, 2010 | No Comments
In the latest Quest
Converting biomass to energy — A South African perspective
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Martina Meincken explains the importance of biomass in providing energy in South Africa.
With fossil fuels becoming ever scarcer and more expensive, renewable energy options are gaining interest worldwide. In developing countries, such as South Africa where the electricity grid is not -
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Posted by admin in Environment, Featured, Science in Society on 19. Feb, 2010 | No Comments
In the latest Quest
Acid mine drainage – can it affect human health?
Acid mine drainage has known adverse effects on the environment. But can it affect human health? Rebecca Garland discusses the issues.
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As you saw in an article in Quest 7(2), acid mine drainage (AMD) can be formed in some of the mining
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tagged: Magellanic cloud, NASA, Quest, Quest Interactive, Quest Science magazine, Science magazine, supernovaNo Comments
Fastest rotating star found in neighbouring galaxy
This artist’s concept pictures the fastest rotating star found to date. The massive, bright young star, called VFTS 102, rotates at 1.6 million km/h per hour, or 100 times faster than our sun does. Centrifugal forces from this dizzying spin rate have flattened the star into an oblate shape and
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Jan
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tagged: IRAS Ring G159.6-18.5, NASA, Quest, Quest Interactive, Quest Science magazine, Science magazine, Wide-field Infrared Survey ExplorerNo Comments
Festival of lights
WISE, NASA’s Wide-field Infrared Survey Explorer, has a new view of Barnard 3, or IRAS Ring G159.6-18.5, that is awash in bright green and red dust clouds. Interstellar clouds like these are stellar nurseries, where baby stars are being born.
The green ring is made of tiny particles of warm dust
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Jan
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tagged: drones, northern goshawk, Quest, Quest Interactive, Quest Science magazine, Science magazineNo Comments
MIT researchers find critical speed above which birds – and drones – are sure to crash
Posted by Bridget in Physics & Maths, Technology
Jennifer Chu, MIT News Office
The northern goshawk is one of nature’s diehard thrill-seekers. The formidable raptor preys on birds and small mammals, speeding through tree canopies and underbrush to catch its quarry. With reflexes that rival a fighter pilot’s, the goshawk zips through a forest at high speeds, constantly adjusting
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Jan
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tagged: cognitive science, information exchange, language evolution, linguistics, Quest, Quest Interactive, Quest Science magazine, Science magazineNo Comments
MIT Research: The advantage of ambiguity in language
Posted by Bridget in Biology, Life, Science in Society
Emily Finn, MIT News Office
Cognitive scientists develop a new take on an old problem: why human language has so many words with multiple meanings.
Why did language evolve? While the answer might seem obvious – as a way for individuals to exchange information – linguists and other students of communication
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Jan
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tagged: Fourier transform, information science, Quest, Quest Interactive, Quest Science magazine, Science magazine, signal processingNo Comments
The faster-than-fast Fourier transform
Posted by Bridget in Physics & Maths, Technology
Larry Hardesty, MIT News Office
For a large range of practically useful cases, MIT researchers find a way to increase the speed of one of the most important algorithms in the information sciences.
The Fourier transform is one of the most fundamental concepts in the information sciences. It is a method for
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Jan
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tagged: concentrated solar power (CSP), Quest, Quest Interactive, Quest Science magazine, Science magazine, spiral heliostatsNo Comments
Here comes the sun
Posted by Bridget in Physics & Maths, Science in Society, Technology
Jennifer Chu, MIT News Office
A new sunflower-inspired pattern increases concentrated solar efficiency.
Just outside Seville, in the desert region of Andalucia, Spain, sits an oasis-like sight: a 100m-high pillar surrounded by rows of giant mirrors rippling outward. More than 600 of these mirrors, each half the size of a tennis
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