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554 notes &

freshphotons:

“The image is the result of fiber tractography from diffusion-weighted magnetic resonance imaging. It illustrates the white matter of the brain, or in other words, its structural connections. The red smooth surface represents a glioblastoma tumor. We can see the effect of repulsion and infiltration of this mass on the white matter fiber pathways. A distance colormap is used for interpretation. Blue fibers mean that they are located within a safe distance of the tumor whereas red fibers are in a close perimeter to the tumor, and can cause severe post-operation deficits, if resected.” -Cerebral Infiltration, Maxime Chamberland, David Fortin, Maxime Descoteaux, Sherbrooke Connectivity Imaging Lab. 

freshphotons:

The image is the result of fiber tractography from diffusion-weighted magnetic resonance imaging. It illustrates the white matter of the brain, or in other words, its structural connections. The red smooth surface represents a glioblastoma tumor. We can see the effect of repulsion and infiltration of this mass on the white matter fiber pathways. A distance colormap is used for interpretation. Blue fibers mean that they are located within a safe distance of the tumor whereas red fibers are in a close perimeter to the tumor, and can cause severe post-operation deficits, if resected.” -Cerebral Infiltration, Maxime Chamberland, David Fortin, Maxime Descoteaux, Sherbrooke Connectivity Imaging Lab. 

(via freshphotons)

Filed under science

339 notes &

wildcat2030:

Engineers and designers are giving commercial aircraft a makeover, in a bid to make them faster, greener and more efficient. Look up into the skies today at a passing aeroplane and the view is not that much different to the one you would have seen 60 years ago. Then and now, most airliners have two wings, a cigar-shaped fuselage and a trio of vertical and horizontal stabilizers at the tail. If it isn’t broke, the mantra has been, why fix it, particularly when your design needs to travel through the air at several hundred miles an hour packed with people. But that conservative view could soon change. Rising fuel prices, increasingly stringent pollution limits, as well as a surge in demand for air travel, mean plane designers are going back to their drawing boards. And, now, radical new shapes and engine technologies are beginning to emerge, promising the biggest shake-up in air travel since de Haviland introduced the first commercial jet airliner in 1952. Of course, it would be wrong to say nothing has changed in the last few decades, says Rich Wahls, an aerodynamicist at Nasa’s Langley Research Center in Hampton, Virginia. “New model airliners don’t come out every year like cars, but it’s not as if they haven’t been evolving under the skin the whole time. There’s so much more technology in there nowadays.” (via BBC - Future - Technology - Radical planes take shape)

wildcat2030:

Engineers and designers are giving commercial aircraft a makeover, in a bid to make them faster, greener and more efficient. Look up into the skies today at a passing aeroplane and the view is not that much different to the one you would have seen 60 years ago. Then and now, most airliners have two wings, a cigar-shaped fuselage and a trio of vertical and horizontal stabilizers at the tail. If it isn’t broke, the mantra has been, why fix it, particularly when your design needs to travel through the air at several hundred miles an hour packed with people. But that conservative view could soon change. Rising fuel prices, increasingly stringent pollution limits, as well as a surge in demand for air travel, mean plane designers are going back to their drawing boards. And, now, radical new shapes and engine technologies are beginning to emerge, promising the biggest shake-up in air travel since de Haviland introduced the first commercial jet airliner in 1952. Of course, it would be wrong to say nothing has changed in the last few decades, says Rich Wahls, an aerodynamicist at Nasa’s Langley Research Center in Hampton, Virginia. “New model airliners don’t come out every year like cars, but it’s not as if they haven’t been evolving under the skin the whole time. There’s so much more technology in there nowadays.” (via BBC - Future - Technology - Radical planes take shape)

Filed under science

1,797 notes &

fuckyeahfluiddynamics:

Differences in surface tension between two layers of fluid can cause fascinating finger-like instabilities.  Here glycerol is spread in a thin film on a silicon wafer.  Then a wire coated in oleic acid, which has a lower surface tension than glycerol, was touched to the wafer.  As the oleic acid spreads across the film surface, Marangoni and capillary stresses cause variations in the film thickness, which results in the dendritic patterns seen here. (Photo credit: B. Fischer et al.)

fuckyeahfluiddynamics:

Differences in surface tension between two layers of fluid can cause fascinating finger-like instabilities.  Here glycerol is spread in a thin film on a silicon wafer.  Then a wire coated in oleic acid, which has a lower surface tension than glycerol, was touched to the wafer.  As the oleic acid spreads across the film surface, Marangoni and capillary stresses cause variations in the film thickness, which results in the dendritic patterns seen here. (Photo credit: B. Fischer et al.)

Filed under science