среда, 26 декабря 2018 г.

Virtual Heart Narrowing of the coronary arteries supplying…


Virtual Heart


Narrowing of the coronary arteries supplying blood to the muscles of the heart is bad news, leading to a heart attack if the blockage is severe enough. In order to find out whether someone is at risk of a heart attack and would benefit from a procedure to unblock their arteries, doctors use a technique called fractional flow reserve (FFR), where a small wire is passed into an artery to measure how much blood is getting through. However, this test is invasive, costly and time-consuming, so doctors often turn to a less reliable but non-invasive imaging technique known as angiography to work out what’s going on. Now researchers have developed a way to improve angiography by using a type of artificial intelligence called machine learning, analysing hundreds of images and generating computer models like the ones shown here to predict the blood flow within the heart and spot potential problems.


Written by Kat Arney



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Barracks, buildings, drainage and hypocaust, Vindolanda Roman Fort, Hadrian’s...













Barracks, buildings, drainage and hypocaust, Vindolanda Roman Fort, Hadrian’s Wall, Northumberland, 22.12.18.


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Headquarters Building and Strong Room, Vindolanda Roman Fort, Hadrian’s Wall,...










Headquarters Building and Strong Room, Vindolanda Roman Fort, Hadrian’s Wall, Northumberland, 22.12.18.


This is the most substantial building of the fort, in keeping with status of the military and administrative activities undertaken here. It was used for local taxation, legal matters and the coordination of troops. The building features a small central courtyard, decorated stone upright slabs or ornate facia; there is also a strong room where wages for soldiers were kept securely.


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Get the popcorn ready for 2019

Occasionally I’m criticized here and elsewhere for focusing too heavily on the Proto-Indo-European (PIE) homeland problem. But there are two very good reasons why I focus so much on this issue. First and foremost, this blog is a platform for original research related to European genetics, rather than just a review blog, so what I focus on largely depends on the data that are released by various labs. And a lot of the data released over the past three years have been directly relevant to the PIE homeland riddle.
Secondly, I enjoy the fact that this is a fairly popular blog, so to keep it popular I have to produce content that attracts a decent number of people. Below are links to the ten posts with original content that attracted the highest number of visitors over the past twelve months (around 10,000 or more hits each, which I suspect is pretty good for such non-mainstream content). Eight of the posts are about the PIE homeland and/or the early Indo-Europeans.



Central Asia as the PIE urheimat? Forget it
On the doorstep of India
Graeco-Aryan parallels
Indo-European crackpottery
The mystery of the Sintashta people
Likely Yamnaya incursion(s) into Northwestern Iran
Indian smoke and mirrors
First real foray into Migration Period Europe: the Gepid, Roman, Ostrogoth and others…
Modeling genetic ancestry with Davidski: step by step
Some German guy once said…



So guess what? In 2019 you’ll be seeing a lot more about the PIE homeland and related topics at this blog, and I offer no apologies for that. Indeed, I actually feel obligated now to stay in the PIE homeland debate to steer it as best as I can in the right direction.
But no matter what I do, I’ll be going out of my way here to keep things fresh and funny. Even when I’m being brutal and vicious (not literally, of course, because I don’t condone violence or threatening behavior) I’ll try to make it a highly entertaining experience for almost everyone.
See also…
Big deal of 2018: Yamnaya not related to Maykop
Late PIE ground zero now obvious; location of PIE homeland still uncertain, but…

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Main Road, Granaries and Stores, Vindolanda Roman Fort, Hadrian’s Wall,...

Main Road, Granaries and Stores, Vindolanda Roman Fort, Hadrian’s Wall, Northumberland, 22.12.18.










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’ A House For Hadrian?’, Vindolanda Roman Fort, Hadrian’s Wall,...



’ A House For Hadrian?’, Vindolanda Roman Fort, Hadrian’s Wall, Northumberland, 22.12.18.


Two metres under this spot lie the remains of a large wooden house which was thought to have accommodated Hadrian whilst the wall was first being constructed. The structure is considered substantial enough to have accommodated Hadrian and a small retinue for a few days.


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2018 December 26 NGC 6357: The Lobster Nebula Image Credit:…


2018 December 26


NGC 6357: The Lobster Nebula
Image Credit: Dean Carr


Explanation: Why is the Lobster Nebula forming some of the most massive stars known? No one is yet sure. Cataloged as NGC 6357, the Lobster Nebula houses the open star cluster Pismis 24 near its center – a home to unusually bright and massive stars. The overall blue glow near the inner star forming region results from the emission of ionized hydrogen gas. The surrounding nebula, featured here, holds a complex tapestry of gas, dark dust, stars still forming, and newly born stars. The intricate patterns are caused by complex interactions between interstellar winds, radiation pressures, magnetic fields, and gravity. NGC 6357 spans about 400 light years and lies about 8,000 light years away toward the constellation of the Scorpion.


∞ Source: apod.nasa.gov/apod/ap181226.html


Flaking Away As unique as fingerprints under a microscope,…


Flaking Away


As unique as fingerprints under a microscope, snowflakes all melt in the same way. Usually they evaporate – their icy prongs sublimating to vapour in the surrounding air. Here, physicists simulate how their icy spikes crumple (bottom row), forming rounded crystals as water vapour diffuses away (from the blue to orange areas here). This virtual thaw matches perfectly with how more complex snow crystals are whittled away (top), and the mathematical model could help climate scientists to extrapolate up from single flakes to vanishing glaciers. But that’s not all. The way ice crystals disintegrate has parallels in pharmacology, where similar simulations may help to design drug molecules which dissolve quickly inside the human body, speeding up the effect of treatments.


Written by John Ankers



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