среда, 19 сентября 2018 г.

Mind Maps Have you ever got lost trying to navigate a dense…


Mind Maps


Have you ever got lost trying to navigate a dense city with a hopelessly vague map? Sometimes that’s what it’s like trying to unpick the complexity of the human brain. For example, transcranial magnetic stimulation is a treatment used for various mental illnesses such as depression and Alzheimer’s, but how exactly it works is a mystery. To investigate what the procedure – which involves firing small electric currents at regions of the brain – actually does, researchers looked at brain ‘orientation maps’ before and after the treatment (pictured – the left of each pair is before the procedure, right after). The colours reflect specific neurons’ orientations in response to visual cues, many of which have changed after the procedure. And visual ‘training’ after the treatment contributed to these updated neural ‘maps’, suggesting that post-treatment behaviour could help redirect misguided brain connections. A promising addition to our incomplete map of the brain’s vast complexity.


Written by Anthony Lewis



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2018 September 19 Cocoon Nebula Deep Field Image Credit &…


2018 September 19


Cocoon Nebula Deep Field
Image Credit & Copyright: Marcel Drechsler (Baerenstein Obs.)


Explanation: Inside the Cocoon Nebula is a newly developing cluster of stars. The cosmic Cocoon on the upper right also punctuates a long trail of obscuring interstellar dust clouds to its left. Cataloged as IC 5146, the beautiful nebula is nearly 15 light-years wide, located some 3,300 light years away toward the northern constellation of the Swan (Cygnus). Like other star forming regions, it stands out in red, glowing, hydrogen gas excited by young, hot stars and blue, dust-reflected starlight at the edge of a nearly invisible molecular cloud. In fact, the bright star near the center of this nebula is likely only a few hundred thousand years old, powering the nebular glow as it slowly clears out a cavity in the molecular cloud’s star forming dust and gas. This exceptionally deep color view of the Cocoon Nebula traces tantalizing features within and surrounding the dusty stellar nursery.


∞ Source: apod.nasa.gov/apod/ap180919.html


Studying Sediments in Space

An International

Space Station
investigation called BCAT-CS studies dynamic forces between

sediment particles that cluster together.


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For the study, scientists sent mixtures of quartz and clay particles to the space

station and subjected them to various levels of simulated gravity.


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Conducting the experiment in microgravity makes it possible to separate out different forces that act on sediments and look at the function of

each.


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Sediment systems of quartz and clay occur many places on Earth, including rivers,

lakes, and oceans, and affect many

activities,
from deep-sea hydrocarbon drilling to carbon sequestration.


image

Understanding how

sediments behave
has a range of applications on Earth, including predicting and mitigating erosion, improving water

treatment, modeling the carbon cycle, sequestering contaminants and more accurately finding deep sea oil

reservoirs.


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It also may provide insight for future studies of the

geology of new and unexplored planets.


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Follow @ISS_RESEARCH to

learn more.



Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.


Aber Coed Iron Age Roundhouse, Abergwyngregyn, North Wales, 16.9.18.It’s only a...











Aber Coed Iron Age Roundhouse, Abergwyngregyn, North Wales, 16.9.18.


It’s only a month since I visited this site and then it was the height of Summer and the roundhouse foundations were bathed in full sun. Today it was wet and misty. Aber Falls were in raging, full flow; a moody, Autumnal experience.


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Prestatyn Roman Bath House, Prestatyn, North Wales, 16.9.18.A small Roman bath house to...











Prestatyn Roman Bath House, Prestatyn, North Wales, 16.9.18.


A small Roman bath house to serve a Roman fort nearby, serving as a coastal defence.


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Grow Worms If you could borrow one ability from an animal what…


Grow Worms


If you could borrow one ability from an animal what would it be? Would you fly like a bird, run like a cheetah, or maybe regrow your whole body from a single chunk like a flatworm? Scientists focussed on that third option have discovered a secret of the flatworm’s trick. They identified a single particular cell that contains all the regenerative power the worm needs. This cell, which can be identified by the vigorous way it expresses a particular gene, is able to develop into all the different types of cell that form a whole healthy worm. In fact, transplanting a single one of these restorative cells into worms decimated by radiation was enough to bring them back from the brink of death (pictured during recovery, from 18 days post transplantation, top left, to 65, bottom right). Could we one day repeat this rebuilding feat in humans?


Written by Anthony Lewis



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