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Oct 5, 2023

Resting Heart Rate, Heart Rate Variability: Is 2023’s Data Better Than 2022?

Posted by in categories: biotech/medical, genetics

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Oct 5, 2023

Astronomers Find Stars Cast Away from Galactic Neighbors

Posted by in category: space

After decades of searching, scientists have found stars accompanying the gas streaming from two smaller galaxies that orbit our Milky Way.

Our galaxy is so big that astronomers are still exploring its stellar backwaters. Now, new observations have enabled them to map a previously uncharted structure in the Milky Way.

Scientists have found 13 stars that they believe are associated with the Magellanic Stream — a giant ribbon of gas stretching over three-quarters of the way across the sky. The researchers presented their findings on the arXiv astronomy preprint server in June.

Oct 5, 2023

How do astronomers know the age of the planets and stars?

Posted by in category: alien life

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected].

How do we know the age of the planets and stars? – Swara D., age 13, Thane, India

Measuring the ages of planets and stars helps scientists understand when they formed and how they change – and, in the case of planets, if life has had time to have evolved on them.

Oct 5, 2023

Inspired by butterfly wings, researchers develop a soft, color-changing system for optical devices

Posted by in categories: biotech/medical, engineering, mobile phones, wearables

Researchers at the University of Hong Kong (HKU) have designed an innovative pixelated, soft, color-changing system called a Morphable Concavity Array (MoCA).

Pixelated, soft, color-changing systems are malleable structures that can change color by manipulating light. They have applications in a wide range of industries, from medical bandages that change color if there is an infection, to foldable screens on smartphones and tablets, as well as wearable technology where sensors are integrated into the clothing fabric.

The research was co-directed by Professor Anderson Ho Cheung Shum from the Department of Mechanical Engineering at HKU, and Professor Mingzhu Li from the Institute of Chemistry, Chinese Academy of Sciences, and led by Dr. Yi Pan from the Department of Mechanical Engineering at HKU.

Oct 5, 2023

Quantum repeaters use defects in diamond to interconnect quantum systems

Posted by in categories: computing, engineering, particle physics, quantum physics

Ben Dixon, a researcher in the Optical and Quantum Communications Technology Group, explains how the process works: “First, you need to generate pairs of specific entangled qubits (called Bell states) and transmit them in different directions across the network link to two separate quantum repeaters, which capture and store these qubits. One of the quantum repeaters then does a two-qubit measurement between the transmitted and stored qubit and an arbitrary qubit that we want to send across the link in order to interconnect the remote quantum systems. The measurement results are communicated to the quantum repeater at the other end of the link; the repeater uses these results to turn the stored Bell state qubit into the arbitrary qubit. Lastly, the repeater can send the arbitrary qubit into the quantum system, thereby linking the two remote quantum systems.”

To retain the entangled states, the quantum repeater needs a way to store them — in essence, a memory. In 2020, collaborators at Harvard University demonstrated holding a qubit in a single silicon atom (trapped between two empty spaces left behind by removing two carbon atoms) in diamond. This silicon “vacancy” center in diamond is an attractive quantum memory option. Like other individual electrons, the outermost (valence) electron on the silicon atom can point either up or down, similar to a bar magnet with north and south poles. The direction that the electron points is known as its spin, and the two possible spin states, spin up or spin down, are akin to the ones and zeros used by computers to represent, process, and store information. Moreover, silicon’s valence electron can be manipulated with visible light to transfer and store a photonic qubit in the electron spin state. The Harvard researchers did exactly this; they patterned an optical waveguide (a structure that guides light in a desired direction) surrounded by a nanophotonic optical cavity to have a photon strongly interact with the silicon atom and impart its quantum state onto that atom. Collaborators at MIT then showed this basic functionality could work with multiple waveguides; they patterned eight waveguides and successfully generated silicon vacancies inside them all.

Lincoln Laboratory has since been applying quantum engineering to create a quantum memory module equipped with additional capabilities to operate as a quantum repeater. This engineering effort includes on-site custom diamond growth (with the Quantum Information and Integrated Nanosystems Group); the development of a scalable silicon-nanophotonics interposer (a chip that merges photonic and electronic functionalities) to control the silicon-vacancy qubit; and integration and packaging of the components into a system that can be cooled to the cryogenic temperatures needed for long-term memory storage. The current system has two memory modules, each capable of holding eight optical qubits.

Oct 5, 2023

Google DeepMind unites researchers in bid to create an ImageNet of robot actions

Posted by in category: robotics/AI

Of all the holy grails in robotics, learning may well be the holiest. In an era when the term “general purpose” is tossed around with great abandon, however, it can be difficult for non-roboticists to understand what today’s systems can — and can’t — do. The truth of it is that most robots these days are built to do one (or a couple, if you’re lucky) thing really well.

It’s a truth that spans the industry, from the lowliest robot vacuum to the most advanced industrial system. So, how do we make the transition from single to general purpose robotics? Certainly, there are going to be a lot of stops in multipurpose land along the way.

The answer is, of course, robot learning. Walk into nearly any robotics research lab these days and you will find teams working on tackling the issue. The same applies to startups and corporations, as well. Look at companies Viam and Intrinsic, which are working to lower the bar of entry for robot programming.

Oct 5, 2023

Advanced Quantum Material Curves the Fabric of Space

Posted by in categories: energy, quantum physics

The latest research on quantum materials and electron curves could revamp our energy-efficient electronics.

Oct 5, 2023

When Nietzsche said ‘become who you are’, this is what he meant

Posted by in category: futurism

The Renaissance sculptor Michelangelo was known for claiming that he deserved little credit for his beautiful works: they were already there inside the rock, he merely cut them out. ‘Every block of stone,’ he said, ‘has a statue inside it and it is the task of the sculptor to discover it. I saw the angel in the marble and carved until I set him free.’

The final product already existed within Michelangelo’s ideals. But it took years of trial and error, practice, and failure to reach the point of being able to give form to it. In a similar sense, Nietzsche would say the ‘you’ that you must become is already there. It’s already inscribed in your values. That which you admire – the preponderance of all your latent virtues – reflects who you are in the truest sense.

The act of becoming who you are is the act of carving your ideal self out of the hard stone of your psyche – of bringing greater and greater refinement to the crude shapes of character that exist in you now. Simultaneously an act of discovery and creation, to become who you are is to bring your virtues to life and synthesise them into a unified whole. Nietzsche proclaims:

Oct 5, 2023

Start of the Fully Fault Tolerant Age of Quantum Computers

Posted by in categories: computing, information science, quantum physics

Without full fault tolerance in quantum computers we will never practically get past 100 qubits but full fault tolerance will eventually open up the possibility of billions of qubits and beyond. In a Wright Brothers Kittyhawk moment for Quantum Computing, a fully fault-tolerant algorithm was executed on real qubits. They were only three qubits but this was never done on real qubits before.

This is the start of the fully fault tolerant age of quantum computers. For quantum computers to be the real deal of unlimited computing disruption then we needed full fault tolerance on real qubits.

Oct 5, 2023

“Unusual” Findings Overturn Current Battery Wisdom

Posted by in categories: innovation, materials

Scientists have made a significant breakthrough in understanding and overcoming the challenges associated with Ni-rich cathode materials used in lithium-ion batteries.

While these materials can reach high voltages and capacities, their real-world usage has been limited by structural issues and oxygen depletion.

Their study revealed that ‘oxygen hole’ formation – where an oxygen ion loses an electron — plays a crucial role in the degradation of LiNiO2 cathodes accelerating the release of oxygen which can then further degrade the cathode material.