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PolyU research unveils mechanoelectrical perception in sea urchin spines, empowering next-generation biomimetic sensors

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HONG KONG SAR – Media OutReach Newswire – 5 March 2026 – Sea urchin spines are not only for defence—they also act as natural sensors. A research team led by Prof. WANG Zuankai, Associate Vice President (Research and Innovation), Dean of Graduate School, Kuok Group Professor in Nature-Inspired Engineering and Chair Professor of the Department of Mechanical Engineering of The Hong Kong Polytechnic University (PolyU), together with scholars from City University of Hong Kong (CityU) and Huazhong University of Science and Technology (HUST), has discovered the mechanoelectrical perception in sea urchin spines, originating in their gradient porous structure, that allows the spines to instantly detect water flow. Using 3D printing, the team has replicated this structure and developed a bionic metamaterial sensor, which holds promise for breakthroughs in sensing technology. This innovation will drive the advancement of deep-sea technology such as marine monitoring and underwater infrastructure management, and can be extended to other emerging fields like brain-computer interfacing and aerospace.

A research team led by Prof. Wang Zuankai, Associate Vice President (Research and Innovation), Dean of Graduate School, Kuok Group Professor in Nature-Inspired Engineering and Chair Professor of the Department of Mechanical Engineering of PolyU, has discovered the mechanoelectrical perception in sea urchin spines. It originates in the spines’ gradient porous structure that generates electrical signals when water flows through it. The team used 3D printing technology to replicate the structure and develop a novel bionic metamaterial sensor.

The research team found that, in the long-spined sea urchin (Diadema setosum), when a seawater droplet strikes the tip of a spine, the spine rotates rapidly within a second. Electrical measurements revealed that the droplet simulation produced a voltage of about 100 millivolts inside the spine; when the spine is immersed in water, water flow stimulation triggers a voltage of several tens of millivolts. This mechanoelectrical perception was observed even in dead spines, indicating that the mechanism is unrelated to biological cells.

This response originates from the stereom structure of the spine—the porous internal skeleton composed of pores with varying sizes and distributions. These pores exhibit a gradual gradient along the spine from the base to the tip: larger pores and lower solid density at the base, and smaller pores and higher solid density at the tip, forming a bicontinuous gradient porous structure. As water flows through the porous structure, solid-liquid interfacial interaction occurs and the flow exerts shear force on the electric double layer, inducing the separation and redistribution of interfacial charge, which generates a voltage difference. The gradient structure intensifies the interaction between water flow and pore surfaces, resulting in a stronger voltage difference and enhancing the spine’s sensing capabilities.

Inspired by these findings, the researchers used vat photopolymerisation 3D printing to create artificial samples from polymer and ceramic materials that resemble the spine’s stereom. Experiments showed that the spine-mimicking design produce a voltage output about three times higher and an amplitude about eight times greater than non-gradient designs under water flow stimulation, demonstrating that the key to the mechanoelectrical perception lies in the structure rather than the material. They also constructed a bionic 3D metamaterial mechanoreceptor that is designed in a 3 × 3 array with each unit made of gradient porous material. This mechanoreceptor can record electrical signals in real time underwater and precisely locate the position of water flow impact, without the need for additional electricity.

The research team points out that the gradient porous structure in sea urchin spines enhances signal transmission, thereby improving the precision and sensitivity of the mechanoreceptor. By replicating this structure in different materials, it is possible to extend its application beyond water flow sensing to various types of signals, including those measuring pressure, vibration and electromagnetic waves. This will inspire sensing technologies in multiple fields, such as in relation to its use in brain-computer interfaces to enhance the sensing of brainwaves and neural signals, with tremendous application potential.

Prof. Wang Zuankai said, “Compared to traditional mechanoreceptors, our design excels in manufacturability, structural design flexibility, material versatility, geometric and performance control, and real-time underwater self-sensing. Leveraging gradients of porous materials and 3D printing technologies, we aspire to produce more nature-inspired metamaterial sensors with a range of materials, pore sizes and surface features that support potential applications in many fields.”

At the forefront of nature-inspired science and engineering research, Prof. Wang’s team has also invented various new materials, including lotus leaf-inspired self-cleaning surfaces capable of rapid water repellency, Araucaria leaves-inspired surfaces that enable self-propelled liquid transport, and anti-icing structures that achieve spontaneous ejection of freezing droplets by replicating the biological mechanism of spore shooting in fungi. He envisions that their research will open up new avenues for the development of nature-inspired materials.

“For natural porous materials, mechanical properties such as strength may not be the primary function, but rather a by-product of complex biomineralisation. Uncovering previously unknown mechanisms that lie beyond a material’s traditionally recognised function helps us to more comprehensively understand and fully utilise these natural resources. This is crucial for advancing biomimetic research,” he added.

This joint research was co-led by Prof. LU Jian from CityU, and Prof. YAN Chunze and Prof. SU Bin from HUST. The study findings have been published in the international journal Nature.
Hashtag: #PolyU #MarineEnvironment #NatureInspiredEngineering #SensingTechnology #DeepSeaTechnology #Brain-ComputerInterface #Nature #HongKong

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Global Governance Report Highlights Future Shock Risks as Democratic Accountability Slips and State Capacity Plateaus

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LOS ANGELES, US – Newsaktuell – 7 May 2026 – The newly released 2026 Berggruen Governance Index (BGI) paints a mixed picture of global governance heading into a future of mounting shocks, finding widespread gains in public-goods provision from 2000 to 2023 even as democratic accountability edged down and state capacity showed little overall improvement.

Presentation of the 2026 Berggruen Governance Index: On 6 May in Los Angeles, the following individuals discussed the findings of the study (from left): Vinay Lai (Professor of History, UCLA), Michael Storper (Distinguished Professor of Urban Planning, UCLA), Stella Ghervas (Professor of History, UCLA) and the two authors of the study, Joseph Saraceno and Prof. Helmut Anheier (both from UCLA’s Luskin School of Public Affairs). Democracy News Alliance / Jordan Strauss/AP for DNA

The BGI, presented Wednesday by an international group of governance scholars, analyses measurable benchmarks of democratic accountability across 145 countries.

On a 100-point scale, the global score for democratic accountability slipped slightly from 65 in 2000 to 64 in 2023, the most recent data used in the project. The wave of democratisation observed in the closing decades of the last century has stalled in the last 15 years. Democratic accountability fell in 54 countries while it improved in 48 countries.

Yet the BGI — a collaborative project of the Luskin School of Public Affairs at the University of California, Los Angeles (UCLA), Berlin’s Hertie School and the Berggruen Institute, a think tank headquartered in Los Angeles — captures remarkably widespread growth in provision of public goods.

Encompassing healthcare, education, infrastructure, environmental sustainability and conditions to foster employment and rising prosperity, public goods improved in 135 of the countries studied, while declining slightly in just four. The global average jumped from 58 to 69 points from 2000 to 2023.

The third component of what the BGI authors refer to as the “governance triangle” is state capacity, defined as the ability to tax, borrow and spend, control territory, operate scrupulous, competent bureaucracies and administer predictable rule of law. The index finds the global average ticking up from 48 to 49 points; 56 countries had increased state capacity while 57 declined.

“What does it tell us about the world ahead?” Prof. Helmut K. Anheier, a Luskin School sociologist and BGI principal investigator, asked during the public release of the 2026 BGI on the UCLA campus.

“Countries are not really improving in their governance performance in significant ways. … We’re not really having forward-looking investment in governance capacity. There is considerable inertia.”

The largest improvements across all three BGI components occurred in Gambia, which the report groups with “low-capacity developing states.” These states score low across the board, particularly in the provision of public goods. This cluster constitutes the poorest countries with the least developed economies, which face the most serious challenges.

“They have the greatest exposure to likely future crises, whether it’s global warming, whether it’s a new pandemic, whether it’s another financial crisis, whether it’s the impact of AI,” Anheier said. “And they have the least capacity to respond to it.”

Bhutan, Georgia, Iraq and Tunisia — which make up the remaining top five countries with the largest improvements in the BGI — are classified as “capacity-constrained states.” They tend to be middle-income with struggling democracies. These countries score higher across the board than the low-capacity developing states, but their state capacity tends to lag compared to public goods and democratic accountability.

The capacity-constrained states risk falling into “a cycle that erodes the institutions they have built,” Anheier said.

“Consolidated democratic states”, a cluster of most of the world’s richest countries, which score highly in all three BGI components, have to confront domestic complacency. Further, in the United States and some others, “political dysfunction” is leaving mounting problems unaddressed and risking erosion of state capacity, Anheier said.

At the other end of the spectrum, the country with the farthest fall on the BGI since 2000 is Nicaragua. Second from last is Venezuela, followed by Hong Kong, Hungary and Turkey. The rest of the bottom 10 are Russia, Iran, Poland, El Salvador and Belarus.

Since 2023, which is the last year of data available for the study, Poland and Hungary have both seen government changes via election, despite serious democratic backsliding. Both had fallen out of the group of “consolidated democratic states” by 2023 and moved into the capacity constrained cluster.

The other eight countries at the bottom of the list are all places that once had some semblance of competitive elections, but by now have little or no remaining pretense of democracy. They are grouped by the authors among the “authoritarian and hybrid states”, which have by far the lowest democratic accountability but outperform even some struggling democracies in delivering public goods.

These regimes have tended toward faster economic growth in the period observed. But that seeming prosperity, typically fueled by extractive industries or overreliance on exports, masks “serious institutional weaknesses in these countries, including divided elites,” Anheier said.

Relatively few countries — 21 of the 145 — changed enough for better or worse to be classified in a new group by the end of the 23-year study period.

“Movement between them is rare, but this is largely what we should expect,” said Stella Ghervas, a UCLA historian on a panel of experts who discussed the BGI findings Wednesday. “Government systems are not created in a moment. They evolve over long periods of time.”

Local conditions shaping governance in each country can rarely be quickly reset through political will or even external shocks, Joseph C. Saraceno, a Luskin School data scientist and BGI co-author, said Wednesday.

“Despite all the talk of major transformations happening in global affairs, the underlying configuration of governance simply doesn’t appear to change very much,” Saraceno said. “We use the term inertia to describe this reoccurring pattern. In other words, the structures of global governance are resistant to movement as the conditions beneath them are quite sticky: political economies, demographics, resource endowments. These are deeply layered, and they push each country toward the world that it already inhabits.”

But the challenges lurking around the world may not wait for the slow and difficult processes of political change and development to catch up.

“With the few exceptions of those countries in the consolidated democratic world,” Anheier said, “the great majority of the countries in the world is ill-prepared for the future.”

The full report, ‘ 2026 Berggruen Governance Index – The Four Worlds of Governance‘, can be viewed and downloaded from the website of the UCLA’s Luskin School.

Frank Fuhrig, DNA

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This text and the accompanying material (photos and graphics) are an offer from the Democracy News Alliance, a close co-operation between Agence France-Presse (AFP, France), Agenzia Nazionale Stampa Associata (ANSA, Italy), The Canadian Press (CP, Canada), Deutsche Presse-Agentur (dpa, Germany) and PA Media (PA, UK). All recipients can use this material without the need for a separate subscription agreement with one or more of the participating agencies. This includes the recipient’s right to publish the material in own products.

The DNA content is an independent journalistic service that operates separately from the other services of the participating agencies. It is produced by editorial units that are not involved in the production of the agencies’ main news services. Nevertheless, the editorial standards of the agencies and their assurance of completely independent, impartial and unbiased reporting also apply here.

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Grobrix Launches “Silver Harvest Initiative”, Turning Schools into Micro-Farms Powered by Students and Retirees

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SINGAPORE – Media OutReach Newswire – 7 May 2026 – More than 200 students and retirees have come together at Bukit View Primary School to grow fresh produce within school corridors, as part of Grobrix’s newly launched Silver Harvest Initiative. With local vegetable production at just 8% against a national target of 20%, the pilot demonstrates how everyday spaces can be transformed into productive micro-farms, offering a scalable approach to local food production in land-scarce Singapore.

The pilot transforms existing spaces such as corridors and rooftops into small-scale growing sites using compact, soil-less farming systems. By using existing infrastructure instead of new farmland or large facilities, the model enables food production across multiple community locations, making it easier to implement in schools and shared environments.

Students take part in planting, transplanting and harvesting as part of their daily school environment, while crops such as leafy greens can be harvested in cycles of approximately three weeks. This demonstrates how consistent production can be achieved even within limited spaces.

Retirees, known as “Silver Farmers”, manage the farms and oversee daily operations. Students support planting, harvesting and basic monitoring, creating a working environment where food production becomes part of everyday school life. The setup also gives students direct exposure to how food is grown and managed, turning the school into a hands-on learning environment aligned with sustainability and applied learning goals.

“Singapore does not have the luxury of large farming spaces. But we have schools, and we have retirees who want to contribute. This pilot shows that food production can be practical and repeatable by using spaces we already have,” said Mathew Howe, Founder of Grobrix.

The initiative comes amid growing adoption of micro-farming across Singapore, with schools, companies and community spaces increasingly integrating small-scale food production into existing environments. Demand for such systems has risen in recent months, reflecting broader interest in community-based approaches to food resilience.

The Bukit View Primary School pilot will run over 12 months, focusing on improving yields and integrating produce into school consumption. Grobrix will track how much of the school’s leafy green needs can be met through these growing spaces, with the aim of developing a model that can be adopted across other schools.

Grobrix has installed more than 100 edible growing systems across Singapore and is expanding its footprint regionally and internationally. The company plans to scale the Silver Harvest Initiative to more schools while training additional retiree participants, building a network of community-based growing sites over time.

As Singapore continues to strengthen its food security strategy, including updated targets to increase local production of vegetables and protein by 2035, the initiative offers a practical example of how food production can be integrated into everyday environments beyond traditional farming spaces. It also aims to build greater awareness of food sources and encourage more active participation in local food systems.
Hashtag: #Grobrix #growingtogether #sustainability #urbanfarming


is a Singapore based agritech company that integrates farming into the built environment through its patented “Farming as a Service” model. By combining modular vertical farming technology with a cloud based management system, the company enables corporate and residential spaces to produce high quality local crops. Beyond hardware, Grobrix fosters community engagement and food resilience through its unique intergenerational and corporate wellness programs. Currently operating across Singapore, Malaysia, and the United States, the brand is redefining how urban populations interact with their food sources. Its mission is to transform urban infrastructure into a productive, sentient, and sustainable ecosystem for all.

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CUHK Claims Top Positions in Hong Kong and Asia in the Latest QS World University Rankings by Subject

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HONG KONG SAR – Media OutReach Newswire – 7 May 2026 – The Chinese University of Hong Kong (CUHK) has achieved outstanding results in the QS World University Rankings by Subject 2026, released on 25 March, further cementing its position as a global leader in research and academic excellence. Ten CUHK subjects have secured the top position in Hong Kong, and 21 subjects rank among the top 50 worldwide. These outstanding results reflect CUHK’s sustained commitment to research impact and the calibre of its scholars, whose work continues to advance the collective understanding of the world’s most pressing challenges.

CUHK’s Academic Excellence and Global Research Impact

Ranked among the world’s top 50 universities, CUHK ascended to 32nd place globally in the QS World University Rankings 2026, marking a four-place rise that reinforces its role as a hub for rigorous inquiry, and a dynamic environment where students are empowered to pursue meaningful research and knowledge exchange. This trajectory is supported by 17 CUHK researchers recognised on the Highly Cited Researchers 2025 list by Clarivate Analytics, and 431 academics listed among the world’s top 2% scientists by Stanford University. Among them, 47 scholars were ranked within the global top 100 in their respective fields. Notably, three scholars, including Vice-Chancellor and President Professor Dennis Lo Yuk-ming, have earned positions within the global top 10, a distinction that highlights the remarkable depth and excellence of CUHK’s research community.

CUHK’s The Nethersole School of Nursing: Nurturing Research Innovation and Global Talent in Nursing

Among CUHK’s strongest performers in this year’s rankings, the Nethersole School of Nursing has been ranked #1 in Hong Kong and Asia, and #6 worldwide. Reflecting on the academic environment, Pham Nhat Vi DO, a Vietnamese PhD student in Nursing, shared: “My PhD journey at CUHK has transformed my research abilities, critical thinking, and leadership skills. Through CUHK’s outstanding faculty support, I have accessed diverse academic resources and gained invaluable hands-on experience, building a strong foundation for my future career.”

Vi’s research focuses on colorectal cancer survivorship using cutting-edge technology. As the first Vietnamese researcher adopting this approach, her work reflects CUHK’s strength in empowering students to break new ground.

CUHK’s Geography and Resource Management: Advancing Student Research on Pressing Climate Challenges

CUHK’s Department of Geography and Resource Management has also earned notable recognition in this year’s ranking, placing #4 in Asia and #21 worldwide. Arati POUDEL, a Nepali PhD student, highlighted the University’s research ecosystem as a key defining aspect of her experience. “CUHK exceeds expectations through outstanding research facilities, supportive faculty, and comprehensive professional development opportunities. The prestigious Belt and Road Scholarship has also enriched my research journey in this beautiful campus environment.”

Supported by CUHK, Arati’s research investigates how adaptation to climate extremes—particularly water scarcity and excess—are being addressed, and the pivotal role played by communities and civil society in leading these responses.

Through the QS World University Rankings by Subject 2026, CUHK continues to demonstrate the impact of its research and scholarship. These achievements underscore the University’s growing influence on the global academic stage and its steadfast commitment to addressing complex global challenges through innovation, insight, and collaboration.
Hashtag: #CUHK

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About CUHK

The Chinese University of Hong Kong (CUHK) is a leading higher education institution dedicated to nurturing and empowering students to become responsible and compassionate global citizens. With a rich heritage and a forward-looking vision, CUHK strives to blend tradition with innovation, fostering academic excellence, research breakthroughs, and meaningful societal impact.

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