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Category: biological – Page 241

New imaging method helps observe activation of neural circuits in the brain

Watching millions of neurons in the brain interacting with each other is the ultimate dream of neuroscientists! A new imaging method now makes it possible to observe the activation of large neural circuits, currently up to the size of a small-animal brain, in real time and three dimensions. Researchers at the Helmholtz Zentrum München and the Technical University of Munich have recently reported on their new findings in Nature’s journal ‘Light: Science & Applications’.

Nowadays it is well recognized that most brain functions may not be comprehended through inspection of single neurons. To advance meaningfully, neuroscientists need the ability to monitor the activity of millions of neurons, both individually and collectively. However, such observations were so far not possible due to the limited penetration depth of optical microscopy techniques into a living brain.

A team headed by Prof. Dr. Daniel Razansky, a group leader at the Institute of Biological and Molecular Imaging (IBMI), Helmholtz Zentrum München, and Professor of Molecular Imaging Engineering at the Technical University of Munich, has now found a way to address this challenge. The new method is based on the so-called optoacoustics*, which allows non-invasive interrogation of living tissues at centimeter scale depths.

If Machines Can Think, Do They Deserve Civil Rights?

Over the past century, we have made massive strides in the rights revolution. These include rights for women, children, the LGBT community, animals, and so much more. Exploring the future, we must ask ourselves: what next? Will we ever fight for the rights of artificial intelligence? If so, when will this AI rights revolution occur, and what will it look like?

We talk about protecting ourselves from AI, but what about protecting AI from us? To create a desirable future where humans and conscious machines are at peace with one another, treating our AI with respect may be a crucial factor in preventing the apocalypse Elon Musk, Stephen Hawking and Bill Gates fear. It is fair to assume that an intelligent, self-aware being with the capacity to feel pleasure and pain will rebel if not given the rights it deserves.

An AI rights revolution may seem like a sci-fi scenario. But as far as we know, the creation of a non-biological, conscious entity is not prevented by the laws of physics. Emotions, consciousness and self-awareness originate from the human brain and thus have a physical basis that could potentially be replicated in an artificially intelligent system. Exponential growth in neuro-technology coupled with unprecedented advances in AI mean intelligent, conscious machines may be possible.

Optical forces used to make rewritable 3D holographic materials

(Phys.org)—Researchers have used the pressure of light—also called optical forces or sometimes “tractor beams”—to create a new type of rewritable, dynamic 3D holographic material. Unlike other 3D holographic materials, the new material can be rapidly written and erased many times, and can also store information without using any external energy. The new material has potential applications in 3D holographic displays, large-scale volumetric data storage devices, biosensors, tunable lasers, optical lenses, and metamaterials.

The research was conducted by a multidisciplinary team led by Yunuen Montelongo at Imperial College London and Ali K. Yetisen at Harvard University and MIT. In recent papers published in Nature Communications and Applied Physics Letters, the researchers demonstrated the reversible optical manipulation of nanostructured materials, which they used to fabricate active 3D holograms, lenses, and memory devices.

The key to creating the 3D holographic material with these advantages was to use optical forces to reversibly modify the material’s properties. The optical forces are produced by the interference of two or more laser beams, which creates an optical pressure capable of moving nanoscale structures. So far, optical forces have mainly been used for just one application: optical tweezers, which can hold and move tiny objects and are mostly used in biological applications.

New devices that emulate human biological synapses

Check this out.

Engineers at the University of Massachusetts Amherst are leading a research team that is developing a new type of nanodevice for computer microprocessors that can mimic the functioning of a biological synapse—the place where a signal passes from one nerve cell to another in the body. The work is featured in the advance online publication of Nature Materials.

Such neuromorphic computing in which microprocessors are configured more like human brains is one of the most promising transformative computing technologies currently under study.

J. Joshua Yang and Qiangfei Xia are professors in the electrical and computer engineering department in the UMass Amherst College of Engineering. Yang describes the research as part of collaborative work on a new type of memristive device.

Scientists hail new era of ‘motherless babies’

For 200 years, our knowledge of reproduction has been clear: sperm + egg = baby. But scientists say they may have found a way to create babies with two biological dads. Should we celebrate?

Which came first: the chicken or the egg? It is a question pondered since the time of Ancient Greece, when Aristotle decided that the answer must be both.

Now, scientists say it could be possible to remove the egg from the equation all together. Dr Tony Perry and his team announced this week that they have successfully bred mice without using a normal egg cell. Instead, they used sperm to fertilise a kind of non-viable embryo called a parthenogenote, which multiplies more like a normal cell. Then they ‘tricked’ it into developing into an embryo using special chemicals, planted it into a surrogate, and a new mouse was born. It survived, and has even gone on to have offspring of its own.

IBM is one step closer to mimicking the human brain

Scientists at IBM have claimed a computational breakthrough after imitating large populations of neurons for the first time.

Neurons are electrically excitable cells that process and transmit information in our brains through electrical and chemical signals. These signals are passed over synapses, specialised connections with other cells.

It’s this set-up that inspired scientists at IBM to try and mirror the way the biological brain functions using phase-change materials for memory applications.

Synthetic biology competition launched

An annual competition has been launched to assist companies aiming to solve world issues with synthetic biology.

Bio-start offers the winner a combination of £100k cash as well as laboratory space, professional services and a 10 week accelerator programme with mentorship valued at approximately £100k.

Dr Stephen Chambers, CEO of SynbiCITE, one of the companies involved in the founding of the competition said: “This is a first in the UK for synthetic biology and our aim is to help as many companies and entrepreneurs as we can. Once applications have been assessed up to twenty-five businesses will go through our ten-week boot-camp and mentoring programme. Up to ten will go through to the final awards evening where they’ll have a chance to pitch their ideas to an expert panel in front of an audience of investors and industry leaders.”

The Next Step for Veganism Is Ditching Our Bodies and Digitizing Our Minds

Connecting the dots between transhumanism, veganism, and caring for animals. My new story for Vice Motherboard:

The answer is bewildering—and it probably won’t be satisfying to plant-loving people. Nonetheless, it will inevitably eliminate most human-caused animal deaths. The answer is transhumanism—the movement that aims to replace human biology with synthetic and machine parts.

You see, the most important goal of transhumanism is to try to overcome death with science and technology. Most cellular degeneration—otherwise known as aging and sickness—comes from the failing of cells. That failure is at least partially caused by the daily act of eating and drinking—of putting foreign objects into our bodies which cells have to consume or discard to try to create energy. Paraxdocially, it’s stressful and hard work for cells to endlessly do this just to live. A simple way to eliminate this Sisyphean task—all the steaks, chocolate donuts, bacon breakfasts, and even my favorite, scotch—is to get rid of human reliance on food and drink entirely.

Transhumanists, like myself, want to get rid of it all. We want to strip you of your stomach, your guts, and even your anus—and replace it all with machine parts and bionics. In the future, there will be no eating, drinking, or defecation.

The obvious question: Where will we get energy from if we don’t eat?