Welcome to Sott.net
Sat, 16 Oct 2021
The World for People who Think

Science & Technology
Map

R2-D2

Computer algorithms are increasingly shaping and filtering our experience of the real world

computer algorithms shape reality
The use of algorithms to filter and present information online is increasingly shaping our everyday experience of the real world, a study published by Information, Communication & Society argues.

Associate Professor Michele Willson of Curtin University, Perth, Australia looked at particular examples of computer algorithms and the questions they raise about personal agency, changing world views and our complex relationship with technologies.

Algorithms are central to how information and communication are located, retrieved and presented online, for example in Twitter follow recommendations, Facebook newsfeeds and suggested Google map directions. However, they are not objective instructions but assume certain parameters and values, and are in constant flux, with changes made by both humans and machines.

Embedded in complex amalgams of political, technical, cultural and social interactions, algorithms bring about particular ways of seeing the world, reproduce stereotypes, strengthen world views, restrict choices or open previously unidentified possibilities.

As well as shaping what we see online, algorithms are increasingly telling us what we should be seeing, the study argues. For example, an algorithm that claims to spot beauty and tell you which selfies to delete implies we should trust technology more than ourselves to make aesthetic choices. Such algorithms also carry assumptions that beauty can be defined as universal and timeless, and can be easily reduced to a particular combination of data.

Chalkboard

Scientists suggest modern man's immunity to toxic smoke led to evolutionary advantage against Neanderthals

neanderthal man
© SEBASTIAN WILLNOW/AFP/Getty Images
A reconstruction of a Neanderthal man at the Prehistoric Museum in Halle, eastern Germany
Modern humans might have beaten the neanderthals because because they couldn't stand the heat and had to get out of the kitchen, scientists have suggested.

Our ancestors may have had an evolutionary advantage in the kitchen because they were more immune to the effects of toxic chemicals that came from cooking meat and burning wood, according to a new study.

We got that power because of a genetic mutation, the study says. And since modern humans from our species, the Homo sapiens, are the only primates carrying it, it would probably have helped them get the advantage in the evolutionary war.

As such it might help why modern humans were able to flourish as their Neanderthal cousins died out, about 40,000 years ago.

But it might also explain why we took up smoking, since the same mutation helps people enjoy breathing in toxic smoke.

Moon

Moon landing rights granted to a private company for the first time ever

moon landing
© Moon Express
An artistic rendering of the MX-1 lander on the surface of the Moon.
Spaceflight venture Moon Express wants to be the first private company ever to land on the Moon in 2017 — and now the company has been granted approval by the United States government to launch to the lunar surface. It's the first time the government has granted regulatory approval for a private mission beyond Earth orbit. And Moon Express came very close to being denied permission to go.

No regulatory framework currently exists for a commercial space missions to another world. Lawmakers are working on a permanent solution, but it likely won't be ready in time for Moon Express' 2017 mission. So the company came up with its own temporary framework — a regulatory patch — that the US government could use to oversee the company's mission. And after a meeting between the Federal Aviation Administration, the White House, and the State Department, Moon Express has been given the approval it needs to launch to the Moon.

So far, commercial companies have mostly just launched satellites into space; all specialized private missions, like launching cargo to the space station, have been overseen by NASA. That means Moon Express could be the first private company to land on the Moon, as well as the company that travels the farthest away from our planet.

Moon

China's Chang'e 3 lunar probe confirms there is no liquid water on the moon

Moon, Chang'e 3 telescope

The latest data from Chang’e 3's onboard optical telescope has confirmed that there is no liquid water on the Moon.
For anyone holding out hope that life as we know it might exist on our terrestrial satellite, China just burst that bubble.

The unmanned lunar lander Chang'e 3 left Earth in December 2013 and arrived at the Moon a few days later, touching down in Mare Imbrium. With its primary mission focused on exploration, the spacecraft announced a major discovery last year, uncovering a new type of basaltic rock.

The latest data from Chang'e 3 points to a new discovery - or, at least, a kind of anti-discovery. Its onboard optical telescope has confirmed that there is no liquid water on the Moon.

Bulb

Self-reliant off-grid village in the Netherlands will produce all of its own energy and organic food

RenGen village
We only have one planet, and so we should use it wisely. You know, kind of like that saying about our health. Well, some of you may have heard that one, and if not, I believe you still get the gist of it. Think about this: our planet and its resources are like our body in a way, and so harsh treatment will eventually wear it out... Unless, of course, we change our mindset about almost everything. So, what should we do about it?

The Netherlands may have an answer to our predicament. It isn't a new concept, mind you, but it's certainly a rather renovated idea. Like the Amish, this project provides the means to be self-reliant, but unlike the simplicity of the Amish, this concept retains high-tech capabilities.

Self-sustainability

When it comes to being self-reliant, we're talking about whole villages, not just one home. After all, self-sustainable living can be accomplished more efficiently by working together, family with family, friend with friend. That's why, a community pilot project, the brainchild of ReGen Villages, a California-based developer, will see its completion in 2017. We will see entire villages which will operate from within! How amazing is that! This concept starts just outside of Amsterdam, but plans are to share these innovations with Sweden, Denmark, Germany and Norway.

Galaxy

Milky Way's 'Halo' spins at dizzying speed

The Milky Way's halo
© NASA/CXC/M.Weiss/Ohio State/A Gupta et al
The Milky Way's halo is a large, hot cloud of gas surrounding the galaxy (shown in blue), which astronomers have found spins in the same direction and at almost the same speed as the galaxy itself.
A humongous, superhot cloud of gas surrounding our galaxy, the Milky Way, is spinning at a dizzying rate, new research shows.

The cloud, called the Milky Way's halo, extends hundreds of thousands of light-years across. Using archived data from the European Space Agency's XMM-Newton telescope, astronomers found the halo is spinning in the same direction as the galaxy and almost as fast.

"This flies in the face of expectations," Edmund Hodges-Kluck, an assistant research scientist at the University of Michigan and lead author on the new study, said in a statement. "People just assumed that the disk of the Milky Way spins while this enormous reservoir of hot gas is stationary — but that is wrong. This hot gas reservoir is rotating as well, just not quite as fast as the disk."

Info

DNA and not RNA is the main repository of genetic information

DNA & RNA
© Huiqing Zhou, Duke University
The DNA double helix (shown on the left) can contort itself into different shapes to absorb chemical damage to the basic building blocks (A, G, C and T, depicted by a black dot) of genetic code. In contrast, an RNA double helix (shown on the right) is so rigid and unyielding that rather than accommodating damaged bases, it falls apart completely.
Durham, NC - A new study could explain why DNA and not RNA, its older chemical cousin, is the main repository of genetic information. The DNA double helix is a more forgiving molecule that can contort itself into different shapes to absorb chemical damage to the basic building blocks -- A, G, C and T -- of genetic code. In contrast, when RNA is in the form of a double helix it is so rigid and unyielding that rather than accommodating damaged bases, it falls apart completely.

The research, published August 1, 2016 in the journal Nature Structural and Molecular Biology, underscores the dynamic nature of the DNA double helix, which is central to maintaining the stability of the genome and warding off ailments like cancer and aging. The finding will likely rewrite textbook coverage of the difference between the two purveyors of genetic information, DNA and RNA.

"There is an amazing complexity built into these simple beautiful structures, whole new layers or dimensions that we have been blinded to because we didn't have the tools to see them, until now," said Hashim M. Al-Hashimi, Ph.D., senior author of the study and professor of biochemistry at Duke University School of Medicine.

DNA's famous double helix is often depicted as a spiral staircase, with two long strands twisted around each other and steps composed of four chemical building blocks called bases.

Each of these bases contain rings of carbon, along with various configurations of nitrogen, oxygen, and hydrogen. The arrangement of these atoms allow G to pair with C and A to pair with T, like interlocking gears in an elegant machine.

When Watson and Crick published their model of the DNA double helix in 1953, they predicted exactly how these pairs would fit together. Yet other researchers struggled to provide evidence of these so-called Watson-Crick base pairs. Then in 1959, a biochemist named Karst Hoogsteen took a picture of an A-T base pair that had a slightly skewed geometry, with one base rotated 180 degrees relative to the other. Since then, both Watson-Crick and Hoogsteen base pairs have been observed in still images of DNA.

Five years ago, Al-Hashimi and his team showed that base pairs constantly morph back and forth between Watson-Crick and the Hoogsteen configurations in the DNA double helix. Al-Hashimi says that Hoogsteen base pairs typically show up when DNA is bound up by a protein or damaged by chemical insults. The DNA goes back to its more straightforward pairing when it is released from the protein or has repaired the damage to its bases.

"DNA seems to use these Hoogsteen base pairs to add another dimension to its structure, morphing into different shapes to achieve added functionality inside the cell," said Al-Hashimi.

Galaxy

Giant stellar void in the center of the Milky Way

Milky Way void
© University of Tokyo
An artist's impression of the implied distribution of young stars, represented here by Cepheids shown as blue stars, plotted on the background of a drawing of the Milky Way. With the exception of a small clump in the Galactic center, the central 8,000 light years appear to have very few Cepheids, and hence very few young stars.
A major revision is required in our understanding of our Milky Way Galaxy according to an international team led by Prof Noriyuki Matsunaga of the University of Tokyo. The Japanese, South African and Italian astronomers find that there is a huge region around the centre of our own Galaxy, which is devoid of young stars. The team publish their work in a paper in Monthly Notices of the Royal Astronomical Society.

milky way star distribution
© University of Tokyo
An artist's illustration of the Milky Way, the galaxy we live in, with the locations of the newly discovered Cepheid stars marked by the yellow points. The previously known objects, located around the sun (marked by a red cross), are indicated by small white dots. The central green circle around the core of the galaxy marks the location of the 'Cepheid desert.
The Milky Way is a spiral galaxy containing many billions of stars with our Sun about 26,000 light years from its centre. Measuring the distribution of these stars is crucial to our understanding of how our Galaxy formed and evolved. Pulsating stars called Cepheids are ideal for this. They are much younger (between 10 and 300 million years old) than our Sun (4.6 billion years old) and they pulsate in brightness in a regular cycle. The length of this cycle is related to the luminosity of the Cepheid, so if astronomers monitor them they can establish how bright the star really is, compare it with what we see from Earth, and work out its distance.

Despite this, finding Cepheids in the inner Milky Way is difficult, as the Galaxy is full of interstellar dust which blocks out light and hides many stars from view. Matsunaga's team compensated for this, with an analysis of near-infrared observations made with a Japanese-South African telescope located at Sutherland, South Africa. To their surprise they found hardly any Cepheids in a huge region stretching for thousands of light years from the core of the Galaxy.

Family

Scientists identify brain regions affected by hypnosis

hypnotized eye
© Karl Birrane/Flickr
The power of hypnotic trance to alter your mind and body is due to changes in a few specific areas of the brain, researchers at the Stanford University School of Medicine have discovered.

The scientists scanned the brains of 57 people during guided hypnosis sessions similar to those that might be used clinically to treat anxiety, pain or trauma. Distinct sections of the brain have altered activity and connectivity while someone is hypnotized, they report in Cerebral Cortex.

Senior author David Spiegel, MD, professor and associate chair of psychiatry and behavioral sciences, said:

Beaker

Russian scientists developing magnetic 3D bioprinter for radiation-monitoring experiments on the ISS

bioprinting Russa ISS
© 3D Bioprinting Solutions / YouTube
Russian scientists in cooperation with the national space agency are developing a magnetic 3D bioprinter that will allow production of living tissue in the micro-gravity conditions of the International Space Station.

The unique technology will be developed in partnership between the United Rocket and Space Corporation, part of the Roscosmos and 3D Bioprinting Solutions, a resident of the Skolkovo Innovation Center.

"The development of a magnetic bioprinter will allow printing tissue and organ constructs which are hypersensitive to the effects of space radiation - sentinel-bodies (eg, thyroid gland) - for biomonitoring of the negative effect of cosmic radiation in the conditions of a prolonged stay in space and for the development of the preventive countermeasures," 3D Bioprinting Solutions said in a press release after signing a contract with the space corporation on Monday.

The scientific team hopes to send the "unique" technology to the ISS by 2018. Scientists envision that in the long term the newly designed bioprinter could potentially be used to correct astronauts' damaged tissues and organs during long space flights. In addition, the company says the new technology could be used on Earth for the "faster" printing of human tissue and organs to save people's lives.

Announcing the new partnership, the United Rocket and Space Corporation's Director General, has called the endeavor "one more step" that will aid "human exploration of other planets." His colleague, the managing partner of the 3D Bioprinting Solutions, Youssef Hesuani believes that the technology will offer a "unique opportunity" to pursue "new approaches in tissue engineering and regenerative medicine."