Author Archives: Maryse de la Giroday

Soundscapes comprised of underground acoustics can help amplify soil health

For anyone who doesn’t like cartoons, this looks a lot cuter than the information it conveys,

An August 16, 2024 news item on ScienceDaily announces the work,

Barely audible to human ears, healthy soils produce a cacophony of sounds in many forms—a bit like an underground rave concert of bubble pops and clicks.

Special recordings made by Flinders University ecologists in Australia show that this chaotic mixture of soundscapes can be a measure of the diversity of tiny living animals in the soil, which create sounds as they move and interact with their environment.

An August 16, 2024 Flinders University press release (also on EurekAlert), which originated the news item, describes a newish (more about newish later) field of research ‘eco-acoustics’ and technical details about the researchers’ work, Note: A link has been removed,

With 75% of the world’s soils degraded, the future of the teeming community of living species that live underground face a dire future without restoration, says microbial ecologist Dr Jake Robinson, from the Frontiers of Restoration Ecology Lab in the College of Science and Engineering at Flinders University.

This new field of research aims to investigate the vast, teeming hidden ecosystems where almost 60% of the Earth’s species live, he says.

“Restoring and monitoring soil biodiversity has never been more important.

“Although still in its early stages, ‘eco-acoustics’ is emerging as a promising tool to detect and monitor soil biodiversity and has now been used in Australian bushland and other ecosystems in the UK.

“The acoustic complexity and diversity are significantly higher in revegetated and remnant plots than in cleared plots, both in-situ and in sound attenuation chambers.

“The acoustic complexity and diversity are also significantly associated with soil invertebrate abundance and richness.”

The latest study, including Flinders University expert Associate Professor Martin Breed and Professor Xin Sun from the Chinese Academy of Sciences, compared results from acoustic monitoring of remnant vegetation to degraded plots and land that was revegetated 15 years ago. 

The passive acoustic monitoring used various tools and indices to measure soil biodiversity over five days in the Mount Bold region in the Adelaide Hills in South Australia. A below-ground sampling device and sound attenuation chamber were used to record soil invertebrate communities, which were also manually counted.   

“It’s clear acoustic complexity and diversity of our samples are associated with soil invertebrate abundance – from earthworms, beetles to ants and spiders – and it seems to be a clear reflection of soil health,” says Dr Robinson.

“All living organisms produce sounds, and our preliminary results suggest different soil organisms make different sound profiles depending on their activity, shape, appendages and size.

“This technology holds promise in addressing the global need for more effective soil biodiversity monitoring methods to protect our planet’s most diverse ecosystems.”

This is a copy of the research paper’s graphical abstract,

Caption: Acoustic monitoring was carried out on soil in remnant vegetation as well as degraded plots and land that was revegetated 15 years ago. Credit: Flinders University

Here’s a link to and a citation for the paper,

Sounds of the underground reflect soil biodiversity dynamics across a grassy woodland restoration chronosequence by Jake M. Robinson, Alex Taylor, Nicole Fickling, Xin Sun, Martin F. Breed. Journal of Applied Ecology Volume 61, Issue 9 September 2024 Pages 2047-2060 DOI: https://doi.org/10.1111/1365-2664.14738 First published online: 15 August 2024

This paper is open access.

‘Newish’ eco-acoustics

Like a lot of newish scientific terms, eco-acoustics, appears to be evolving. A search for the term led me to the Acoustic ecology entry on Wikipedia, Note: Links have been removed,

Acoustic ecology, sometimes called ecoacoustics or soundscape studies, is a discipline studying the relationship, mediated through sound, between human beings and their environment.[1] Acoustic ecology studies started in the late 1960s with R. Murray Schafer a musician, composer and former professor of communication studies at Simon Fraser University (Vancouver, British Columbia, Canada) with the help of his team there[2] as part of the World Soundscape Project. The original WSP team included Barry Truax and Hildegard Westerkamp, Bruce Davies and Peter Huse, among others. The first study produced by the WSP was titled The Vancouver Soundscape. This innovative study raised the interest of researchers and artists worldwide, creating enormous growth in the field of acoustic ecology. In 1993, the members of the by now large and active international acoustic ecology community formed the World Forum for Acoustic Ecology.[3]

Soundscapes are composed of the anthrophony, geophony and biophony of a particular environment. They are specific to location and change over time.[12] Acoustic ecology aims to study the relationship between these things, i.e. the relationship between humans, animals and nature, within these soundscapes. These relationships are delicate and subject to disruption by natural or man-made means.[9]

The acoustic niche hypothesis, as proposed by acoustic ecologist Bernie Krause in 1993,[23] refers to the process in which organisms partition the acoustic domain, finding their own niche in frequency and/or time in order to communicate without competition from other species. The theory draws from the ideas of niche differentiation and can be used to predict differences between young and mature ecosystems. Similar to how interspecific competition can place limits on the number of coexisting species that can utilize a given availability of habitats or resources, the available acoustic space in an environment is a limited resource that is partitioned among those species competing to utilize it.[24]

In mature ecosystems, species will sing at unique bandwidths and specific times, displaying a lack of interspecies competition in the acoustic environment. Conversely, in young ecosystems, one is more likely to encounter multiple species using similar frequency bandwidths, which can result in interference between their respective calls, or a complete lack of activity in uncontested bandwidths. Biological invasions can also result in interference in the acoustic niche, with non-native species altering the dynamics of the native community by producing signals that mask or degrade native signals. This can cause a variety of ecological impacts, such as decreased reproduction, aggressive interactions, and altered predator-prey dynamics.[25] The degree of partitioning in an environment can be used to indicate ecosystem health and biodiversity.

Earlier bioacoustic research at Flinders University has been mentioned in a June 14, 2023 posting “The sound of dirt.” Finally, whether you spell it eco-acoustics or ecoacoustics or call it acoustic ecology, it is a fascinating way of understanding the natural and not-so-natural world we live in.

Catching up with Twitch, livestreaming, and science communication

I hadn’t heard of Twitch until stumbling across a Sep 18, 2024 article by Nicole Carpenter for Polygon (gaming and entertainment news source), Note: Links have been removed,

The atmosphere of Halo’s arid planet Sanghelios or the science of Valorant’s Alpha Earth aren’t the only explorations of space you’ll find on Twitch [emphasis mine]. The livestreaming platform is best known as a hub for games like League of Legends, Valorant, or Minecraft, but today, it’s also a place for people to learn: about science, space, and the planet we live on. Science and technology have their very own category on Twitch [emphasis mine], which hosts everything from NASA livestreaming a total solar eclipse to a group of enthusiasts monitoring seismic waves.

It’s also where you’ll find Twitch partner and space, science, and astrobiology communicator Moohoodles, who shares space news, like the first images from the Euclid space telescope or watching the Odyssey spacecraft land on the moon, and plays video games while chatting about science to her viewers.

Ahead of TwitchCon, Polygon emailed with Moohoodles (who asked Polygon to use her handle for privacy) about her long career on Twitch, science’s place on the platform, and building an engaged community.

Moohoodles talks about how her start on Twitch and her start as a science communication on Twitch, from the Sep 18, 2024 article,

Polygon: Can you introduce yourself? What’s your niche on Twitch?

Moohoodles: I’m a pioneer of science communication on Twitch, covering astrobiology while serving up engaging and animated reactions to the latest news about outer space. Imagine Ms. Frizzle crossed with Carl Sagan, contagiously snort laughing. My community loves our fun and safe corner of the internet where we can nerd out about astronomy and increase our scientific literacy. When I’m not gushing about space, sharks, conservation, or programming, you can find me gaming everything from retro to new releases. My content is informed by a decade of live-streaming experience and energized by my passion for encouraging and uplifting women in STEM [science, technology, engineering, and mathematics].

What brought you to Twitch? How long have you been streaming?

I have been streaming since May of 2014! Twitch was very different over a decade ago, and to be honest I started streaming because I thought I was funny and had good reactions to video games! I never would have imagined back then what my stream would turn into and how impactful it could be. As far as I remember, Twitch didn’t have any non-gaming categories in 2014, so I would just talk about all my passions and interests while I played video games. In 2015 while I played Fallout 3, I remember my community was really excited to talk about the future where humans could land on Mars, and also talk about the possibility of life out there in the universe. To keep a long story short, after non-gaming categories were added I would bring more lecture based materials (with powerpoints I created for talks to my college’s Astronomy Club that I ran) and do deep dives into specific Astrobiology topics on my stream.

In 2018, Twitch created the Science & Technology category and it was a huge win for all of the science communication streamers! I was so happy to pave the way for that category to be created, and it’s the main category I stream in now as I cover current news in outer space and astrobiology, plus rocket launches! Of course, I still do a bunch of variety gaming, and I love bringing in new viewers to the educational side of Twitch through space themed games!

You can find science communication anywhere, eh?

First-of-its-kind thermally-insulated and breathable soft robotic clothing for use in extreme heat

An August 15, 2024 news item on ScienceDaily announces research that may help make people safer in extreme heat,

As global warming intensifies, people increasingly suffer from extreme heat. For those working in a high-temperature environment indoors or outdoors, keeping thermally comfortable becomes particularly crucial. A team led by Dr Dahua SHOU, Limin Endowed Young Scholar in Advanced Textiles Technologies and Associate Professor of the School of Fashion and Textiles of The Hong Kong Polytechnic University (PolyU) has developed first-of-its-kind thermally-insulated and breathable soft robotic clothing that can automatically adapt to changing ambient temperatures, thereby helping to ensure worker safety in hot environments. Their research findings have been published in the international interdisciplinary journal Advanced Science.

An August 14, 2024 Hong Kong Polytechnic University press release (also on EurekAlert but published on August 15, 2024), which originated the news item, elaborates on the issue and on the proposed solution,

Maintaining a constant body temperature is one of the most critical requirements for living and working. High-temperature environments elevate energy consumption, leading to increased heat stress, thus exacerbating chronic conditions such as cardiovascular disease, diabetes, mental health issues and asthma, while also increasing the risk of infectious disease transmission. According to the World Health Organisation, globally, there were approximately 489,000 heat-related deaths annually between 2000 and 2019, with 45% occurring in Asia and 36% in Europe.

Thermal protective clothing is essential to safeguard individuals in extreme high-temperature environments, such as firefighters who need to be present at fires [sic] scenes and construction workers who work outdoors for extended periods. However, traditional gear has been limited by statically fixed thermal resistance, which can lead to overheating and discomfort in moderate conditions, while its heat insulation may not offer sufficient protection in extreme fire events and other high-temperature environments. To address this issue, Dr Shou and his team have developed intelligent soft robotic clothing for automatic temperature adaptation and thermal insulation in hot environments, offering superior personal protection and thermal comfort across a range of temperatures.

Their research was inspired by biomimicry in nature, like the adaptive thermal regulation mechanism in pigeons, which is mainly based on structural changes. Pigeons use their feathers to trap a layer of air surrounding their skin to reduce heat loss to the environment. When the temperature drops, they fluff up their feathers to trap a significant amount of still air, thereby increasing thermal resistance and retaining warmth.

The protective clothing developed by the team uses soft robotic textile for dynamic adaptive thermal management. Soft actuators, designed like a human network-patterned exoskeleton and encapsulating a non-toxic, non-flammable, low-boiling-point fluid, were strategically embedded within the clothing. This thermo-stimulated system turns the fluid from a liquid into a gas when the ambient temperature rises, causing expansion of soft actuators and thickening the textile matrix, thereby enhancing the gap of still air and doubling the thermal resistance from 0.23 to 0.48 Km²/W. The protective clothing can also keep the inner surface temperatures at least 10°C cooler than conventional heat-resistant clothing, even when the outer surface reaches 120°C.

This unique soft robotic textile, made by thermoplastic polyurethane, is soft, resilient and durable. Notably, it is far more skin-friendly and conformable than temperature-responsive clothing embedded with shape-memory alloys and is adjustable for a wide range of protective clothing. The soft actuators have exhibited no signs of leakage after undergoing rigorous standard washing tests. The porous, spaced knitting structure of the material can also significantly reduce convective heat transfer while maintaining high moisture breathability. Not relying on thermoelectric chips or circulatory liquid cooling systems for cooling or heat conduction, the light-weighted, soft robotic clothing can effectively regulate temperature itself without any energy consumption.

Dr Shou said, “Wearing heavy firefighting gear can feel extremely stifling. When firefighters exit a fire scene and remove their gear, they are sometimes drained nearly a pound of sweat from their boots [sic]. This has motivated me to develop a novel suit capable of adapting to various environmental temperatures while maintaining excellent breathability. Our soft robotic clothing can seamlessly adapt to different seasons and climates, multiple working and living conditions, and transitions between indoor and outdoor environments to help users experience constant thermal comfort under intense heat.”

Looking forward, Dr Shou finds the innovation to have a wide range of potential applications, from activewear, winter jackets, healthcare apparel and outdoor gear, to sustainable textile-based insulation for construction and buildings, contributing to energy-saving efforts. Supported by the Innovation and Technology Commission and the Hong Kong Research Institute of Textiles and Apparel, Dr Shou and his team have also extended the thermo-adaptive concept to develop inflatable, breathable jackets and warm clothing. This soft robotic clothing is suitable for low-temperature environments or sudden temperature drops to aid those who are stranded in the wilderness to maintain normal body temperature.

Here’s a link to and a citation for the paper,

Soft Robotic Textiles for Adaptive Personal Thermal Management by Xiaohui Zhang, Zhaokun Wang, Guanghan Huang, Xujiang Chao, Lin Ye, Jintu Fan, Dahua Shou. Volume 11, Issue 21 June 5, 2024 2309605 First published online: 26 March 2024 DOI: https://doi.org/10.1002/advs.202309605

This paper is open access.

From AI to Ancient Greece; the 2024-25 theatre season at Concordia University (Montréal, Québec)

An October 30, 2024 Concordia University news release by Vanessa Hauguel announces the upcoming theatre season, which features a focus on how current technology and historical narratives intersect, Note: Links have been removed,

The Concordia Department of Theatre recently announced its 2024-25 season, featuring a diverse lineup of scripted and devised works. The program delves into themes relevant to today’s world, from artificial intelligence (AI) and deepfakes to the timeless human experiences and societal change.

Two upcoming productions highlight the department’s wide range of creative approaches. The first is Concord Floral by Jordan Tannahill, directed by Emma Tibaldo. The second is a devised adaptation of La vida es sueño (Life is a Dream), based on Pedro Calderón de la Barca’s classic play, directed by Peter Farbridge.

While these two productions kick off the season, additional performances are planned throughout the year until April 2025, continuing the department’s exploration of contemporary and classic themes. Directors Farbridge and Tibaldo, as well as this season’s artistic producer, Noah Drew, share the creative vision behind the shows and the thematic connections between them.

Modern ghost story

Concord Floral, by Canadian playwright Tannahill, is a modern ghost story set in an abandoned greenhouse where a group of teenagers face a buried secret. Directed by Tibaldo, a Concordia theatre graduate, 99, and artist-in-residence, it incorporates cutting-edge technology to navigate themes of guilt, adolescence and the weight of collective silence.

Concord Floral is a play that sticks with you,” Tibaldo explains. “It speaks to growing up, discovering yourself and grappling with your accountability to others. The haunting or ‘plague’ in the play is represented through movement, lighting and sound, creating a visceral embodiment of guilt and regret.”

The play draws on The Decameron as a point of reference, adding a sense of timelessness to the teenage experience. “During our teen years, we often react or make impulsive decisions, as we’re discovering or aiming to break boundaries, and sometimes they come with lasting consequences,” Tibaldo says. “This play will resonate strongly with many, as it captures that intense, confusing period of early adulthood.”

La vida es sueño: mixing AI, deepfakes & philosophy

Meanwhile, La vida es sueño offers a reimagining of Calderón de la Barca’s work, making allusions to contemporary issues like AI deepfakes. Farbridge, MA 22, explores the philosophical themes of illusion and reality in this adaptation, examining how modern technology manipulates perception.

“At the heart of the play is the idea that our lives are shaped by false narratives, a timeless concept that feels increasingly relevant in today’s world,” Farbridge says.

“Our adaptation looks at how political systems manipulate truth on a massive scale. And the deeper question we’re asking is, if belief in what we see and hear in online media collapses, where will we land?”

Farbridge’s production will use a combination of video screens, shadow-play and physical performance to explore these themes. “We’re experimenting with form and trying to find new ways of engaging with the audience. It’s an exciting process, and unnerving too, as we won’t know the full impact of it until the public is in the theatre with us..”

A season of learning and innovating

As this season’s artistic producer, Drew sees the productions as essential learning experiences for students. “A big part of students’ education has to come from ‘stage time’ — those moments when a live audience is experiencing their work,” the associate professor says.

“These two productions offer a chance to engage with classic stories radically reinvented —Concord Floral reinterprets The Decameron, while La vida es sueño rethinks a Spanish Golden Age play. I hope it gives students the opportunity to see how historical narratives can connect with today’s issues, and grasp a deeper, more personal understanding of how history loops and cycles.”

Drew also points out the importance of technology in both productions.

“Lighting, sound and video are used all the time in many forms of art and entertainment media. What’s special about their use in theatre is that audiences get to see them in a real three-dimensional space interacting with our species’ original ‘technology’ — the human body. This liveness and immediacy can create almost-hallucinatory images that make audiences rub their eyes and wonder if the haunting moments in Concord Floral or the manipulations of truth in La vida es sueño are illusions or are really happening.”

Reflecting on the broader significance of theatre, Drew believes that storytelling plays a vital role in addressing the challenges of today’s rapidly changing world.

“We live in a time of war, climate crises, political polarization, flawed AI, and many forms of injustice,” he says. “Theatre can help us step outside of our routines, wake up, and yearn for more. It’s a way to make sense of a complicated world and spark inspiration.”

La vida es sueño (Life is a Dream) runs from November 14 to 16 [2024] in room 240 of the Molson (MB) Building, 1450 Guy Street.

Concord Floral runs November 27 to 30 [2024] at the Concordia Theatre in the Henry F. Hall (H) Building, 1455 Boulevard De Maisonneuve West.

Should you be in Montréal and able to attend the performances, you can find more details via Concordia University’s PUBLIC PERFORMANCES 2024-25 webpage.

Converting body heat into electricity with smart fabric

This bioenergy harvesting story is from the University of Waterloo (Ontario, Canada), where its researchers were part of an international collaboration. From an August 14, 2023 news item on ScienceDaily,

Imagine a coat that captures solar energy to keep you cozy on a chilly winter walk, or a shirt that can monitor your heart rate and temperature.Picture clothing athletes can wear to track their performance without the need for bulky battery packs.

University of Waterloo researchers have developed a smart fabric with these remarkable capabilities.

The fabric has the potential for energy harvesting, health monitoring, and movement tracking applications.

An August 14, 2024 University of Waterloo news release (also on EurekAlert), which originated the news item, provides more information about the new fabric and the research team, Note: A link has been removed,

The new fabric developed by a Waterloo research team can convert body heat and solar energy into electricity, potentially enabling continuous operation with no need for an external power source. Different sensors monitoring temperature, stress, and more can be integrated into the material.

It can detect temperature changes and a range of other sensors to monitor pressure, chemical composition, and more. One promising application is smart face masks that can track breath temperature and rate and detect chemicals in breath to help identify viruses, lung cancer, and other conditions.

“We have developed a fabric material with multifunctional sensing capabilities and self-powering potential,” said Yuning Li, a professor in the Department of Chemical Engineering. “This innovation brings us closer to practical applications for smart fabrics.”

Unlike current wearable devices that often depend on external power sources or frequent recharging, this breakthrough research has created a novel fabric which is more stable, durable, and cost-effective than other fabrics on the market. 

This research, conducted in collaboration with Professor Chaoxia Wang and PhD student Jun Peng from the College of Textile Science and Engineering at Jiangnan University, showcases the potential of integrating advanced materials such as MXene and conductive polymers with cutting-edge textile technologies to advance smart fabrics for wearable technology.

Li, director of Waterloo’s Printable Electronic Materials Lab, highlighted the significance of this advancement, which is the latest in the university’s suite of technologies disrupting health boundaries.

“AI technology is evolving rapidly, offering sophisticated signal analysis for health monitoring, food and pharmaceutical storage, environmental monitoring, and more. However, this progress relies on extensive data collection, which conventional sensors, often bulky, heavy, and costly, cannot meet,” Li said. “Printed sensors, including those embedded in smart fabrics, are ideal for continuous data collection and monitoring. This new smart fabric is a step forward in making these applications practical.”

The next phase of research will focus on further enhancing the fabric’s performance and integrating it with electronic components in collaboration with electrical and computer engineers. Future developments may include a smartphone app to track and transmit data from the fabric to healthcare professionals, enabling real-time, non-invasive health monitoring and everyday use.

Here’s a link to and a citation for the paper,

MXene-based thermoelectric fabric integrated with temperature and strain sensing for health monitoring by Jun Peng, Fangqing Ge, Weiyi Han, Tao Wu, Jinglei Tang, Yuning Li, Chaoxia Wang. Journal of Materials Science & Technology Volume 212, 20 March 2025, Pages 272-280

This paper is behind a paywall but you will be able to read snippets in a preview.

Shortlist for 2024 Maddox Prize for Standing up for Science

Sense about Science is a UK “independent charity that promotes the public interest in sound science and evidence,” according to the organization’s homepage. An October 29, 2024 Sense About Science announcement arrived in my email box (also online here),

Unfortunately, we don’t yet live in a world where it is safe for researchers to always speak out openly and honestly about research findings, even when it is important for society that they do so. We need to be able to ask difficult and sometimes uncomfortable scientific questions if we are to make decisions that affect the lives of many on the best available evidence. 

Fortunately, however, there are brave researchers around the world who bringing evidence to public debate despite the potential of facing harassment or intimidation. The Maddox Prize is awarded by Springer Nature and Sense about Science to individuals who have shown courage and integrity in standing up for sound science and evidence and encourages others to do the same.  

This year the judges have shortlisted 8 inspiring individuals from all the nominations received. They are:  

Patrick Ball for his rigorous statistical work identifying, cataloguing and prosecuting war crimes. Patrick founded the Human Rights Data Analyst Group (HRDAG) and has spent over thirty years producing analysis for truth commissions, non-governmental organisations, international criminal tribunals and United Nations missions.  

Kelly Cobey for her work implementing open science and championing the need to reform research assessment. Kelly is an Associate Professor at the University of Ottawa, where she is also director of the Metaresearch and Open Science programme. 

Sholto David for his active role in identifying fabricated studies and results and protecting the integrity of science. Sholto is an analytical scientist with a PhD in cell and molecular biology from Newcastle University.  

Ann McNeill for her work on studying interventions to reduce threats posed by cigarette smoking. Ann is a Professor of Tobacco Addiction in the National Addiction Centre at the Institute of Psychiatry, Psychology and Neuroscience, King’s College London.  

Ben Mol for his work exposing scientific fraud in obstetrics and gynaecology research and removing fabricated papers from the literature. Ben is a Professor of obstetrics/gynaecology at Monash University in Australia.  

John Nkengasong for conducting epidemiological studies of the COVID-19 virus in Africa whilst he was the director of the Africa Centres for Disease Control and Prevention. His efforts played a huge part in protecting the African population from COVID-19 despite challenges such as testing in regions of conflict. John is a virologist currently serving as the Global AIDS Coordinator in the Biden administration.  

Shiba Subedi for his dedication campaigning in Nepali society for better awareness and preparedness for earthquakes. Shiba currently works as a seismologist at the Nepal Academy of Science and Technology.  

Carola Vinuesa for her work using genetic sequencing to prevent unwarranted accusation of parents that they have harmed their children. Carola is internationally renowned for her discoveries in genetic causes of autoimmunity, and currently works at the Francis Crick Institute in London. 

Maddox Prize 2024 website

The winners will be announced on 6 November [2024] at a reception in London.

Good luck to all the nominees!

Where are those space elevators? Here are some answers as graphene celebrates a 20th anniversary

In the last week or so I’d been wondering what happened to the space elevators (it’s exactly what it sounds like, an elevator that takes you into space) and then this September 23, 2024 essay by Stephen Lyn (Strathclyde Chancellor’s Fellow, Chemical and Process Engineering, University of Strathclyde) on The Conversation popped up, Note: Links have been removed,

Graphene at 20: still no sign of the promised space elevator, but here’s how this wonder material is quietly changing the world

Twenty years ago [2004] this October , two physicists at the University of Manchester, Andre Geim and Konstantin Novoselov, published a groundbreaking paper on the “electric field effect in atomically thin carbon films”. Their work described the extraordinary electronic properties of graphene, a crystalline form of carbon equivalent to a single layer of graphite, just one atom thick.

Around that time, I started my doctorate at the University of Surrey. Our team specialised in the electronic properties of carbon. Carbon nanotubes were the latest craze, which I was happily following. One day, my professor encouraged a group of us to travel to London to attend a talk by a well-known science communicator from the University of Manchester. This was Andre Geim.

We were not disappointed. He was inspiring for us fresh-faced PhD students, incorporating talk of wacky Friday afternoon experiments with levitating frogs, before getting on to atomically thin carbon. All the same, we were sceptical about this carbon concept. We couldn’t quite believe that a material effectively obtained from pencil lead with sticky tape was really what it claimed to be. But we were wrong.

The work was quickly copied and reproduced by scientists across the globe. New methods for making this material were devised. Incredible claims about its properties made it sound like something out of a Stan Lee comic. Stronger than steel, highly flexible, super-slippery and impermeable to gases. A better electronic conductor than copper and a better thermal conductor than diamond, as well as practically invisible and displaying a host of exotic quantum properties.

Graphene was hailed as a revolutionary material, promising ultra-fast electronics, supercomputers and super-strong materials. More fantastical claims have included space elevators, solar sails, artificial retinas, even invisibility cloaks. [emphasis mine]

Lyn takes us back to earth, from the September 23, 2024 essay,

In terms of public perception, it’s fair to say that graphene has been held to an impossible standard. The popular media can certainly exaggerate science stories for clicks, but academics – including myself – are not immune from over-egging or speculating about their pet projects either. I’d argue this can even be useful, helping to drive new technologies forward. Equally, though, there can be a backlash when progress looks disappointing.

Having said that, disruptive technologies such as cars, television or plastic all required decades of development. Graphene is still a newcomer in the grand scheme of things, so it’s far too early to reach any conclusions about its impact.

Lyn goes on to point out where graphene has made inroads, from the September 23, 2024 essay, Note: Links have been removed

What has quietly occurred is a steady integration of graphene into numerous practical applications. Much of this is thanks to the Graphene Flagship, a major European research initiative coordinated by Chalmers University of Technology in Sweden. This aims to bring graphene and related materials from academic research to real-world commercial applications, and more than 90 products have been developed over the past decade as a result.

These include blended plastics for high-performance sports equipment, more durable racing tyres for bicycles, motorcycle helmets that better distribute impact forces, thermally conductive coatings for motorcycle components, and lubricants for reducing friction and wear between mechanical parts.

Graphene is finding its way into batteries and supercapacitors, enabling faster charging times and longer life spans. Conductive graphene inks are now used to manufacture sensors, wireless tracking tags, heating elements, and electromagnetic shielding for protecting sensitive electronics. Graphene is even used in headphones to improve the sound quality, and as a more efficient means of transmitting heat in air-conditioning units.

Graphene oxide products are being used for desalination, wastewater treatment and purification of drinking water. Meanwhile, a range of graphene materials can be bought off the shelf for use in countless other products, and major corporations including SpaceX, Tesla, Panasonic, Samsung, Sony and Apple are all rumoured or known to be using them to develop new products.

I am thankful for Lyn’s September 23, 2024 essay, which answers my question about space elevators and offers a good update on graphene’s integration and impact on society. If you have an interest in hearing the Sir Andre Geim talk “Random Walk to Graphene,” Lyn has embedded the almost 38 minutes talk in his essay. Finally, h/t to phys.org’s Sept. 23, 2024 news item.

World’s smallest disco party features nanoscale disco ball

I haven’t featured one of these ‘fun’ (world’s smallest xxx) announcements in a long time. An August 14, 2024 news item on phys.org announces the world’s smallest disco party and a step towards exploring quantum gravity, Note: Links have been removed,

Physicists at Purdue [Purdue University, Indiana, US] are throwing the world’s smallest disco party. The disco ball itself is a fluorescent nanodiamond, which they have levitated and spun at incredibly high speeds. The fluorescent diamond emits and scatters multicolor lights in different directions as it rotates. The party continues as they study the effects of fast rotation on the spin qubits within their system and are able to observe the Berry phase.

The team, led by Tongcang Li, professor of Physics and Astronomy and Electrical and Computer Engineering at Purdue University, published their results in Nature Communications. Reviewers of the publication described this work as “arguably a groundbreaking moment for the study of rotating quantum systems and levitodynamics” and “a new milestone for the levitated optomechanics community.”

This graph illustrates a diamond particle levitated above a surface ion trap. The fluorescent diamond nanoparticle is driven to rotate at a high speed (up to 1.2 billion rpm) by alternating voltages applied to the four corner electrodes. This rapid rotation induces a phase in the nitrogen-vacancy electron spins inside the diamond. The diagram in the top left corner depicts the atomic structure of a nitrogen-vacancy spin defect inside the diamond. Graphic provided by Kunhong Shen.

An August 13, 2024 Purdue University news release (also on EurekAlert but published August 14, 2024) by Cheryl Pierce, which originated the news item, explains what makes this work so exciting (!), Note: Links have been removed,

“Imagine tiny diamonds floating in an empty space or vacuum. Inside these diamonds, there are spin qubits that scientists can use to make precise measurements and explore the mysterious relationship between quantum mechanics and gravity,” explains Li, who is also a member of the Purdue Quantum Science and Engineering Institute.  “In the past, experiments with these floating diamonds had trouble in preventing their loss in vacuum and reading out the spin qubits. However, in our work, we successfully levitated a diamond in a high vacuum using a special ion trap. For the first time, we could observe and control the behavior of the spin qubits inside the levitated diamond in high vacuum.”

The team made the diamonds rotate incredibly fast—up to 1.2 billion times per minute! By doing this, they were able to observe how the rotation affected the spin qubits in a unique way known as the Berry phase.

“This breakthrough helps us better understand and study the fascinating world of quantum physics,” he says.

The fluorescent nanodiamonds, with an average diameter of about 750 nm, were produced through high-pressure, high-temperature synthesis. These diamonds were irradiated with high-energy electrons to create nitrogen-vacancy color centers, which host electron spin qubits. When illuminated by a green laser, they emitted red light, which was used to read out their electron spin states. An additional infrared laser was shone at the levitated nanodiamond to monitor its rotation. Like a disco ball, as the nanodiamond rotated, the direction of the scattered infrared light changed, carrying the rotation information of the nanodiamond.

The authors of this paper were mostly from Purdue University and are members of Li’s research group: Yuanbin Jin (postdoc), Kunhong Shen (PhD student), Xingyu Gao (PhD student) and Peng Ju (recent PhD graduate). Li, Jin, Shen, and Ju conceived and designed the project and Jin and Shen built the setup. Jin subsequently performed measurements and calculations and the team collectively discussed the results. Two non-Purdue authors are Alejandro Grine, principal member of technical staff at Sandia National Laboratories, and Chong Zu, assistant professor at Washington University in St. Louis. Li’s team discussed the experiment results with Grine and Zu who provided suggestions for improvement of the experiment and manuscript.

“For the design of our integrated surface ion trap,” explains Jin, “we used a commercial software, COMSOL Multiphysics, to perform 3D simulations. We calculate the trapping position and the microwave transmittance using different parameters to optimize the design. We added extra electrodes to conveniently control the motion of a levitated diamond. And for fabrication, the surface ion trap is fabricated on a sapphire wafer using photolithography. A 300-nm-thick gold layer is deposited on the sapphire wafer to create the electrodes of the surface ion trap.”

So which way are the diamonds spinning and can they be speed or direction manipulated? Shen says yes, they can adjust the spin direction and levitation.

“We can adjust the driving voltage to change the spinning direction,” he explains. “The levitated diamond can rotate around the z-axis (which is perpendicular to the surface of the ion trap), shown in the schematic, either clockwise or counterclockwise, depending on our driving signal. If we don’t apply the driving signal, the diamond will spin omnidirectionally, like a ball of yarn.”

Levitated nanodiamonds with embedded spin qubits have been proposed for precision measurements and creating large quantum superpositions to test the limit of quantum mechanics and the quantum nature of gravity.

“General relativity and quantum mechanics are two of the most important scientific breakthroughs in the 20th century. However, we still do not know how gravity might be quantized,” says Li. “Achieving the ability to study quantum gravity experimentally would be a tremendous breakthrough. In addition, rotating diamonds with embedded spin qubits provide a platform to study the coupling between mechanical motion and quantum spins.”

This discovery could have a ripple effect in industrial applications. Li says that levitated micro and nano-scale particles in vacuum can serve as excellent accelerometers and electric field sensors. For example, the US Air Force Research Laboratory (AFRL) are using optically-levitated nanoparticles to develop solutions for critical problems in navigation and communication.

“At Purdue University, we have state-of-the-art facilities for our research in levitated optomechanics,” says Li. “We have two specialized, home-built systems dedicated to this area of study. Additionally, we have access to the shared facilities at the Birck Nanotechnology Center, which enables us to fabricate and characterize the integrated surface ion trap on campus. We are also fortunate to have talented students and postdocs capable of conducting cutting-edge research. Furthermore, my group has been working in this field for ten years, and our extensive experience has allowed us to make rapid progress.”

Quantum research is one of four key pillars of the Purdue Computes initiative, which emphasizes the university’s extensive technological and computational environment.

This research was supported by the National Science Foundation (grant number PHY-2110591), the Office of Naval Research (grant number N00014-18-1-2371), and the Gordon and Betty Moore Foundation (grant DOI 10.37807/gbmf12259). The project is also partially supported by the Laboratory Directed Research and Development program at Sandia National Laboratories.

Here’s a link to and a citation for the paper,

Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum by Yuanbin Jin, Kunhong Shen, Peng Ju, Xingyu Gao, Chong Zu, Alejandro J. Grine & Tongcang Li. Nature Communications volume 15, Article number: 5063 (2024) DOI: https://doi.org/10.1038/s41467-024-49175-3 Published online: 13 June 2024

This paper is open access.

Mayonnaise and nuclear fusion research?

Intriguing, eh? An August 6, 2023 news item on ScienceDaily announces an innovative approach to studying nuclear fusion energy,

Researchers are using mayonnaise to study and address the stability challenges of nuclear fusion by examining the phases of Rayleigh-Taylor instability. Their innovative approach aims to inform the design of more stable fusion capsules, contributing to the global effort to harness clean fusion energy. Their most recent paper explores the critical transitions between elastic and plastic phases in these conditions.

An August 6, 2024 Lehigh University (Pennsylvania, US) news release, which originated the news item, elaborates on the mayonnaise-fusion connection,

Mayonnaise continues to help researchers better understand the physics behind nuclear fusion.

“We’re still working on the same problem, which is the structural integrity of fusion capsules used in inertial confinement fusion, and Hellmann’s Real Mayonnaise is still helping us in the search for solutions,” says Arindam Banerjee, the Paul B. Reinhold Professor of Mechanical Engineering and Mechanics at Lehigh University and Chair of the MEM department in the P.C. Rossin College of Engineering and Applied Science. 

In simple terms, fusion reactions are what power the sun. If the process could be harnessed on earth, scientists believe it could offer a nearly limitless and clean energy source for humanity. However, replicating the sun’s extreme conditions is an incredibly complex challenge. Researchers across science and engineering disciplines, including Banerjee and his team, are examining the problem from a multitude of perspectives.

Inertial confinement fusion is a process that initiates nuclear fusion reactions by rapidly compressing and heating capsules filled with fuel, in this case, isotopes of hydrogen. When subjected to extreme temperatures and pressure, these capsules melt and form plasma, the charged state of matter that can generate energy. 

“At those extremes, you’re talking about millions of degrees Kelvin and gigapascals of pressure as you’re trying to simulate conditions in the sun,” says Banerjee. “One of the main problems associated with this process is that the plasma state forms these hydrodynamic instabilities, which can reduce the energy yield.”

In their first paper on the topic back in 2019, Banerjee and his team examined that problem, known as Rayleigh-Taylor instability. The condition occurs between materials of different densities when the density and pressure gradients are in opposite directions, creating an unstable stratification. 

“We use mayonnaise because it behaves like a solid, but when subjected to a pressure gradient, it starts to flow,” he says. Using the condiment also negates the need for high temperatures and pressure conditions, which are exceedingly difficult to control.

Banerjee’s team used a custom-built, one-of-a-kind rotating wheel facility within Banerjee’s Turbulent Mixing Laboratory to mimic the flow conditions of the plasma. Once the acceleration crossed a critical value, the mayo started to flow. 

One of the things they figured out during that initial research was that before the flow became unstable, the soft solid, i.e., the mayo, went through a couple of phases.  

“As with a traditional molten metal, if you put a stress on mayonnaise, it will start to deform, but if you remove the stress, it goes back to its original shape,” he says. “So there’s an elastic phase followed by a stable plastic phase. The next phase is when it starts flowing, and that’s where the instability kicks in.”

Understanding this transition between the elastic phase and the stable plastic phase is critical, he says, because knowing when the plastic deformation starts might tip off researchers as to when the instability would occur, Banerjee says. Then, they’d look to control the condition in order to stay within this elastic or stable plastic phase.

Here’s a link to and a citation for the latest paper,

Transition to plastic regime for Rayleigh-Taylor instability in soft solids by Aren Boyaci and Arindam Banerjee. Phys. Rev. E 109, 055103 – Published 15 May 2024 DOI: https://doi.org/10.1103/PhysRevE.109.055103

This paper is behind a paywall.

Jennifer Ouellette’s August 9, 2024 article for Ars Technica offers information that augments what can be learned from the news release, Note 1: For anyone who’s not a physicist is more accessible than the paper; Note 2: Links have been removed,

Inertial confinement fusion is one method for generating energy through nuclear fusion, albeit one plagued by all manner of scientific challenges (although progress is being made). Researchers at Lehigh University are attempting to overcome one specific bugbear with this approach by conducting experiments with mayonnaise placed in a rotating figure-eight contraption. They described their most recent findings in a new paper published in the journal Physical Review E with an eye toward increasing energy yields from fusion.

The work builds on prior research in the Lehigh laboratory of mechanical engineer Arindam Banerjee, who focuses on investigating the dynamics of fluids and other materials in response to extremely high acceleration and centrifugal force. In this case, his team was exploring what’s known as the “instability threshold” of elastic/plastic materials. Scientists have debated whether this comes about because of initial conditions, or whether it’s the result of “more local catastrophic processes,” according to Banerjee. The question is relevant to a variety of fields, including geophysics, astrophysics, explosive welding, and yes, inertial confinement fusion.

If you’re interested in learning more about inertial confinement fusion, Ouellette’s August 9, 2024 article will help.

As for fusion energy, there are many articles here; just use the search engine.

Nominees for new SETI ‘Art and AI’ Artist in Residency (AIR) program announced

Not exactly an art/science (or sciart) story. let’s call it an art/technology (or techno art) story. The SETI (Search for Extraterrestrial Intelligence) Institute issued an October 22, 2024 news release (also on EurekAlert but published October 23, 2024) announcing the six nominees for SETI’s new artist in residency (AIR) program ‘Algorithmic Imaginings’,

The SETI Artist in Residency (AIR) program announced Algorithmic Imaginings, a new residency that explores how AI technologies affect science and society. The residency focuses on creative research topics such as imaginary life, human-AI collaboration, AI futures, posthumanism, AI and consciousness, and the ethics of AI data. It also connects with current SETI Institute research, including exoplanet studies, astrobiology, signal detection, and advanced computing. The two-year program offers $30,000 in funding and an exhibition at the ZKM | Center for Art and Media in Karlsruhe, Germany.

“AI is on everyone’s mind right now, be it ChatGPT4, text-to-video generators such as Sora, and discussions surrounding fake news and copyright,” said Bettina Forget, Director of the AIR program. “AI is a phenomenal tool, but it also comes with opportunities and concerns that should be addressed. This residency allows artists working at the intersection of art and technology to explore new avenues of thinking and connect them to SETI Institute research.”

Internationally recognized media art curator Zhang Ga, SETI AIR program Director Bettina Forget, and SETI AIR program Founder and Senior Advisor Charles Lindsay lead the SETI AIR Algorithmic Imaginings residency. Andrew Siemion, the SETI Institute’s Bernard M. Oliver Chair for SETI Research, and AI researcher Robert Alvarez, who collaborates with the SETI Institute as a mentor for its Frontier Development Lab program, bring their science and technology expertise to this residency.

The residency’s team of advisors selected six outstanding media artists and invited them to submit a project proposal for the SETI AIR Algorithmic Imaginings residency.

“These artists are notable voices with a solid track record of critically and inventively confronting the pressing issues raised by a pervasively technological world,” said Zhang Ga.

“SETI AIR is uniquely poised to participate in the AI zeitgeist that is exploding in San Francisco and Silicon Valley,” said Charles Lindsay. “We will support the most innovative artists of our time. It is time. Now.”

The SETI Institute will announce the winning artist later this fall.

The six nominees of the Art and AI residency are:

Tega Brain
Tega Brain’s work examines ecology, data, automation, and infrastructure. She has created projects such as digital networks controlled by environmental phenomena, schemes for obfuscating personal data, and a wildly popular online smell-based dating service.

Dominique Gonzalez Foerster
An experimental artist based in Paris, Dominique Gonzalez-Foerster explores the different modalities of sensory and cognitive relationships between bodies and spaces, real or fictitious, up to the point of questioning the distance between organic and inorganic life.

Laurent Grasso
French-born artist Laurent Grasso has developed a fascination with the visual possibilities related to the science of electromagnetic energy, radio waves, and naturally occurring phenomena.

HeHe (Helen Evans, Heiko Hansen)
HeHe is an artist duo consisting of Helen Evans (French, British) and Heiko Hansen (German), based in Le Havre, France. Their works are about the social, industrial, and ecological paradoxes found in today’s technological landscapes. Their practice explores the relationship between art, media, and the environment.

Terike Haapoja
Terike Haapoja is an interdisciplinary visual artist, writer, and researcher. Haapoja’s work investigates our world’s existential and political boundaries, specifically focusing on issues arising from the anthropocentric worldview of Western traditions. Animality, multispecies politics, cohabitation, time, loss, and repairing connections are recurring themes in Haapoja’s work.

Wang Yuyang
Wang Yuyang is a renowned contemporary Chinese artist teaching at the Central Academy of Fine Arts. Focused on techno-art, his work explores the relationships between technology and art, nature and artificiality, and material and immaterial through an interdisciplinary and multimedia approach.

About the SETI Institute

Founded in 1984, the SETI Institute is a non-profit, multi-disciplinary research and education organization whose mission is to lead humanity’s quest to understand the origins and prevalence of life and intelligence in the Universe and to share that knowledge with the world. Our research encompasses the physical and biological sciences and leverages expertise in data analytics, machine learning and advanced signal detection technologies. The SETI Institute is a distinguished research partner for industry, academia and government agencies, including NASA and NSF.

Caption: The six nominees for the SETI Institute’s Algorithmic Imaginings residency. Credit: SETI Institute [top row, left to right: Dominique Gonzalez Foerster; HeHe (Helen Evans, Heiko Hansen); Laurent Grasso; bottom row, left to the right: Tega Brain; Terike Haapoja; and Wang Yuyang]

Good luck to the artists.