News tagged with fractures
Study links ultrafast machine trading with risk of crash
(PhysOrg.com) -- In the United States, ultrafast trading in financial markets between 2006 and 2011 was the underlying factor for over 18,000 extreme price changes, according to a new study. Neil Johnson, ...
Feb 19, 2012 |
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First ever single crystal metallic glass created under 25 gigapascals of pressure
Glass, by definition, is amorphous; its atoms lack order and are arranged every which way. But when scientists squeezed tiny samples of a metallic glass under high pressure, they got a surprise: The atoms ...
Jun 16, 2011 |
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Methane levels 17 times higher in water wells near hydrofracking sites
A study by Duke University researchers has found high levels of leaked methane in well water collected near shale-gas drilling and hydrofracking sites. The scientists collected and analyzed water samples from 68 private ...
May 09, 2011 |
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Fracking leaks may make gas 'dirtier' than coal
(PhysOrg.com) -- Extracting natural gas from the Marcellus Shale could do more to aggravate global warming than mining coal, according to a Cornell study published in the May issue of Climatic Change Letters (105:5).
Apr 12, 2011 |
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Study ties oil, gas production to Midwest quakes
Oil and gas production may explain a sharp increase in small earthquakes in the nation's midsection, a new study from the U.S. Geological Survey suggests.
Space & Earth / Earth Sciences
Apr 07, 2012 |
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Researchers challenge study on hydrofracking's gas footprint
(PhysOrg.com) -- A Cornell study's contention that hydraulic fracturing would be worse for climate change than burning coal is being challenged by another study, also by Cornell researchers.
Mar 05, 2012 |
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Bridge destruction to reveal clues about 'fracture-critical' spans
A civil engineer at Purdue University is taking advantage of the demolition of a bridge spanning the Ohio River to learn more about how bridges collapse in efforts to reduce the annual cost of inspecting large ...
Jul 28, 2011 |
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New fracture resistance mechanisms provided by graphene
A team of researchers from the University of Arizona and Rensselaer Polytechnic Institute have increased the toughness of ceramic composites by using graphene reinforcements that enable new fracture resistance ...
Nanotechnology / Nanomaterials
Apr 13, 2011 |
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Study finds leptin restores fertility, may improve bone health in lean women
Women with extremely low body fat, including runners and dancers, as well as women with eating disorders, are prone to develop hypothalamic amenorrhea, a condition in which their menstrual periods cease, triggering such serious ...
Medicine & Health / Medical research
Apr 04, 2011 |
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Hip fractures and thyroid disease linked in study
New research from UC Davis Health System finds that older men with subclinical thyroid dysfunction have an increased risk of suffering hip fractures and suggests that screening and treatment for thyroid dysfunction in its ...
Medicine & Health / Diseases, Conditions, Syndromes
Nov 30, 2010 |
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'Hydraulic fracturing' mobilizes uranium in marcellus shale
Scientific and political disputes over drilling Marcellus shale for natural gas have focused primarily on the environmental effects of pumping millions of gallons of water and chemicals deep underground to ...
Oct 25, 2010 |
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Researchers develop more reliable, less expensive synthetic graft material
With a failure rate as high as 50 percent, bone tissue grafts pose a significant obstacle to orthopedic surgeons attempting to repair complex fractures or large areas of bone loss, such as those often caused by trauma and ...
Oct 22, 2010 |
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Scientists develop method for determining diet of our early ancestors
(PhysOrg.com) -- Were our early mammalian ancestors vegetarians, vegans or omnivores? It's difficult for anthropologists to determine the diet of early mammalians because current fossil analysis provides too ...
Other Sciences / Archaeology & Fossils
Sep 16, 2010 |
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Gene find offers hope of screening test for bone disease
Scientists have discovered three genes linked to the development of Paget's disease, a painful bone condition that affects up to one million people in the UK.
May 02, 2010 |
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Fracking requires a minimum distance of at least 0.6 kilometers from sensitive rock strata
The chances of rogue fractures due to shale gas fracking operations extending beyond 0.6 kilometres from the injection source is a fraction of one percent, according to new research led by Durham University.
Apr 24, 2012 |
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Fracture
A fracture is the (local) separation of an object or material into two, or more, pieces under the action of stress.
The word fracture is often applied to bones of living creatures (that is, a bone fracture), or to crystals or crystalline materials, such as gemstones or metal. Sometimes, in crystalline materials, individual crystals fracture without the body actually separating into two or more pieces. Depending on the substance which is fractured, a fracture reduces strength (most substances) or inhibits transmission of light (optical crystals).
A detailed understanding of how fracture occurs in materials may be assisted by the study of fracture mechanics.
For more information about Fracture, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
