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Nov 14, 2019

A superbug kills one of us every 15 minutes, federal scientists report

Posted by in category: biotech/medical

Every 15 minutes, someone in the United States dies of a superbug that has learned to outsmart even our most sophisticated antibiotics, according to a new report from the US Centers for Disease Control and Prevention.

That’s about 35,000 deaths each year from drug-resistant infections, according to the landmark report.

The report places five drug-resistant superbugs on the CDC’s “urgent threat” list — two more germs than were on the CDC’s list in 2013, the last time the agency issued a report on antibiotic resistance.

Nov 14, 2019

Using imitation and reinforcement learning to tackle long-horizon robotic tasks

Posted by in categories: food, policy, robotics/AI

Reinforcement learning (RL) is a widely used machine-learning technique that entails training AI agents or robots using a system of reward and punishment. So far, researchers in the field of robotics have primarily applied RL techniques in tasks that are completed over relatively short periods of time, such as moving forward or grasping objects.

A team of researchers at Google and Berkeley AI Research has recently developed a new approach that combines RL with learning by imitation, a process called relay policy learning. This approach, introduced in a paper prepublished on arXiv and presented at the Conference on Robot Learning (CoRL) 2019 in Osaka, can be used to train artificial agents to tackle multi-stage and long-horizon tasks, such as object manipulation tasks that span over longer periods of time.

“Our research originated from many, mostly unsuccessful, experiments with very long tasks using (RL),” Abhishek Gupta, one of the researchers who carried out the study, told TechXplore. “Today, RL in robotics is mostly applied in tasks that can be accomplished in a short span of time, such as grasping, pushing objects, walking forward, etc. While these applications have a lot value, our goal was to apply reinforcement learning to tasks that require multiple sub-objectives and operate on much longer timescales, such as setting a table or cleaning a kitchen.”

Nov 14, 2019

Facebook’s latest giant language AI hits computing wall at 500 Nvidia GPUs

Posted by in categories: innovation, robotics/AI

Facebook AI research’s latest breakthrough in natural language understanding, called XLM-R, performs cross-language tasks with 100 different languages including Swahili and Urdu, but it’s also running up against the limits of existing computing power.

Nov 14, 2019

The Search for Life in the Universe Documentary — The Science of Exoplanets Discovery

Posted by in categories: alien life, science

https://www.youtube.com/watch?v=oOCBGisXXDo&feature=share

How do we find other planets?
For life in the universe to be abundant, planets must be abundant. But planets are hard to detect because they are small, and much fainter than the stars they orbit.

How does life begin?
Scientists do not yet know how the first living things arose on Earth. The geological record shows that life appeared on Earth almost as soon as the young planet was cool and stable enough for living things to survive. This suggests that life may exist wherever conditions allow it.

Nov 14, 2019

Bacteria in the gut may alter aging process

Posted by in categories: biotech/medical, genetics, life extension, neuroscience

Summary: Transplanting gut microbiota from older mice to younger germ-free mice increased hippocampal neurogenesis and intestinal growth. Source: Nanyang Technological UniversityAn internationa.

Nov 14, 2019

Physicists irreversibly split photons by freezing them in a Bose-Einstein condensate

Posted by in categories: futurism, quantum physics

Light can be directed in different directions, usually also back the same way. Physicists from the University of Bonn and the University of Cologne have, however, succeeded in creating a new one-way street for light. They cool photons down to a Bose-Einstein condensate, which causes the light to collect in optical “valleys” from which it can no longer return. The findings from basic research could also be of interest for the quantum communication of the future. The results are published in Science.

A beam is usually divided by being directed onto a partially reflecting mirror: Part of the light is then reflected back to create the mirror image. The rest passes through the mirror. “However, this process can be turned around if the experimental set-up is reversed,” says Prof. Dr. Martin Weitz from the Institute of Applied Physics at the University of Bonn. If the and the part of the light passing through the mirror are sent in the opposite direction, the original light beam can be reconstructed.

The physicist investigates exotic optical quantum states of light. Together with his team and Prof. Dr. Achim Rosch from the Institute for Theoretical Physics at the University of Cologne, Weitz was looking for a new method to generate optical one-way streets by cooling the photons: As a result of the smaller energy of the photons, the light should collect in valleys and thereby be irreversibly divided. The physicists used a Bose-Einstein condensate made of photons for this purpose, which Weitz first achieved in 2010, becoming the first to create such a “super–.”

Nov 14, 2019

Quantum physics: Our study suggests objective reality doesn’t exist

Posted by in categories: biotech/medical, quantum physics

Alternative facts are spreading like a virus across society. Now it seems they have even infected science—at least the quantum realm. This may seem counter intuitive. The scientific method is after all founded on the reliable notions of observation, measurement and repeatability. A fact, as established by a measurement, should be objective, such that all observers can agree with it.

But in a paper recently published in Science Advances, we show that in the micro-world of atoms and particles that is governed by the strange rules of quantum mechanics, two different observers are entitled to their own facts. In other words, according to our best theory of the building blocks of nature itself, facts can actually be subjective.

Continue reading “Quantum physics: Our study suggests objective reality doesn’t exist” »

Nov 14, 2019

Subcellular computations within brain during decision-making

Posted by in categories: biotech/medical, neuroscience

New research suggests that during decision-making, neurons in the brain are capable of much more complex processing than previously thought.

In a study published in eLIFE, researchers, including first author Aaron Kerlin, PhD, who is an assistant professor in the Department of Neuroscience and member of the Medical Discovery Team on Optical Imaging and Brain Science at the University of Minnesota Medical School, were the first to develop a microscope that rapidly images large stretches of the dendrite where neurons receive thousands of inputs from other neurons.

Dr. Kerlin conducted this research while at Janelia Research Campus and found that neighboring inputs to small sections of dendrite tended to represent similar information about upcoming actions.

Nov 14, 2019

Brain implant boosts human memory by up to 30%

Posted by in category: neuroscience

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Nov 14, 2019

CRISPR’s unwanted anniversary

Posted by in categories: biotech/medical, government, health

There are key moments in the history of every disruptive technology that can make or break its public perception and acceptance. For CRISPR-based genome editing, such a moment occurred 1 year ago—an unsettling push into an era that will test how society decides to use this revolutionary technology.

In November 2018, at the Second International Summit on Human Genome Editing in Hong Kong, scientist He Jiankui announced that he had broken the basic medical mantra of “do no harm” by using CRISPR-Cas9 to edit the genomes of two human embryos in the hope of protecting the twin girls from HIV. His risky and medically unnecessary work stunned the world and defied prior calls by my colleagues and me, and by the U.S. National Academies of Sciences and of Medicine, for an effective moratorium on human germline editing. It was a shocking reminder of the scientific and ethical challenges raised by this powerful technology. Once the details of He’s work were revealed, it became clear that although human embryo editing is relatively easy to achieve, it is difficult to do well and with responsibility for lifelong health outcomes.

It is encouraging that scientists around the globe responded by opening a deeper public conversation about how to establish stronger safeguards and build a viable path toward transparency and responsible use of CRISPR technology. In the year since He’s announcement, some scientists have called for a global but temporary moratorium on heritable human genome editing. However, I believe that moratoria are no longer strong enough countermeasures and instead, stakeholders must engage in thoughtfully crafting regulations of the technology without stifling it. In this vein, the World Health Organization (WHO) is pushing government regulators to engage, lead, and act. In July, WHO issued a statement requesting that regulatory agencies in all countries disallow any human germline editing experiments in the clinic and in August, announced the first steps in establishing a registry for future such studies.