Friday, September 12, 2025

Nepal’s first woman chief justice to become next PM

By AFP
September 12, 2025


Known for her insistence on integrity, Sushila Karki has often spoken about the need for transparency and independence in a judiciary frequently under intense political pressure - Copyright AFP Arun SANKAR

Paavan MATHEMA

Nepal’s first woman Supreme Court chief justice Sushila Karki will be sworn in to lead the government in the Himalayan nation after deadly protests ousted the prime minister.

Known for her insistence on integrity, the 73-year-old has often spoken about the need for transparency and independence in a judiciary frequently under intense political pressure.

“President Ram Chandra Paudel will appoint former chief justice Sushila Karki as the prime minister,” presidential press adviser Kiran Pokharel told AFP, ahead of her expected swearing in later on Friday.

Karki emerged as the leading candidate by many “Gen Z” representatives — the loose umbrella title of the protest movement.

She told Nepali media that the Gen Z protesters had told her that “they believe in me” to lead for “a short time for the purpose of doing elections”.

“She is a credible choice to lead the interim government,” Anil Kumar Sinha, a former justice of the Supreme Court who worked with Karki, told AFP.

“Her integrity has never been in doubt, and she is not someone who can be intimidated or easily influenced. She is courageous and not swayed by pressure.”



– ‘In favour of youth’ –



In a speech broadcast on Nepali media earlier this year, she spoke of ingrained corruption.

“We see it everywhere but we don’t speak — now we need the youth to speak up, take the lead and stand in elections”, she said.

“What I have seen in the last 35 years does not work, I am 100 percent in favour of youth coming forward.”

Her tenure as chief justice, from 2016 to 2017, was brief but significant — challenging gender stereotypes and facing down politicians over corruption.

Karki came of age in a society where women rarely entered the legal profession.

Born in 1952 in Biratnagar, an industrial town in eastern Nepal, she earned degrees in political science in India and in law in Kathmandu.

She began her career as a lawyer in 1979, and quickly gained a reputation as a fearless advocate, often taking up cases others avoided.



– Defiant –



In 2012, Karki was one of two presiding Supreme Court judges who jailed a serving government minister for corruption — a first at the time for Nepal in its battle against a culture of graft.

In 2017, the government tried to impeach her as chief justice after she overturned its choice for chief of police.

The United Nations called the impeachment “politically motivated” and the move was blocked. She stepped down from the post at her retirement.

Nepal emerged from a brutal decade-long Maoist insurgency in 2006, and in 2008, the end of the country’s 240-year-old Hindu monarchy.

The transformation to a federal state was marred by political infighting and successive governments have dragged their feet on bringing perpetrators of abuses committed during the civil war to justice.

But it was under Karki’s watch as chief justice that a court in 2017 sentenced three soldiers to 20 years in jail for the murder of a teenage girl, at the time only the second conviction for crimes committed during the war.

She will be Nepal’s first woman prime minister, but not its first woman leader — Bidya Devi Bhandari held the largely ceremonial role of president for two terms from 2015 to 2023.

Nepal seeks new leader as army reclaims streets after protest violence

Kathmandu (AFP) – Nepal's president and army sought on Friday to find a consensus interim leader to fill a political vacuum after deadly anti-corruption protests toppled the government and left parliament in flames.



Issued on: 12/09/2025  RFI

People in Nepal took advantage of a brief lifting of a curfew to stock up on supplies as the president and the army chief met to seek an interim leader in the wake of the worst violence in the Himalayan nation in decades
 © Pedro Pardo / AFP

The Himalayan nation of 30 million people was plunged into chaos this week after security forces tried to crush rallies by young anti-corruption protesters, culminating in widespread violence on Tuesday.

At least 51 people were killed in the worst violence since the end of a Maoist civil war and abolition of the monarchy in 2008.

The military took back control of the streets on Wednesday, enforcing a curfew, as army chief General Ashok Raj Sigdel and President Ramchandra Paudel held talks with key figures and representatives from "Gen Z", the loose umbrella title of the youth protest movement.

'Solution being sought'

Disagreements between rival factions remain, although Sushila Karki, 73, Nepal's first woman chief justice, is a leading candidate.

"A meeting has been scheduled for this afternoon with the president, the army chief, former chief justice Sushila Karki, our representative Sudan Gurung and one legal expert," Nimesh Shrestha, who was part of the Gen Z protest, told AFP.

Nepal's army Chief General Ashok Raj Sigdel addressed the nation following unrest that toppled the govermnment and left parliament in flames © Nepali Army Facebook / AFP

Karki has told AFP that "experts need to come together to figure out the way forward", and that "the parliament still stands".

Gurung, the youth activist, told reporters on Thursday that their "first demand is the dissolution of parliament".

Paudel issued a statement to the nation on Thursday saying that "a solution to the problem is being sought, as soon as possible".

The army patrolled the largely quiet streets of the capital Kathmandu for a third day on Friday, after the protests and nationwide chaos that included a mass breakout of prisoners.

"I was very afraid and stayed locked inside my home with family and didn't leave," said Naveen Kumar Das, a painter-decorator in his mid-40s.

He was among many ordinary residents of Kathmandu who took advantage of a brief lifting of the curfew in the morning to stock up on supplies.

Food stores, tea stalls and pharmacies bustled with customers after people spent days inside.

"It was a really tense time and we just stayed indoors," said Laxmi Thapa, 32, on a motorbike as her husband filled its fuel tank.

"We came out as things have improved."

'Make a better Nepal'

At least 21 protesters were among those killed, mainly on Monday during a police crackdown on demonstrations against corruption and poor governance that was sparked by a ban on social media.


Nepal's president and army chief seek to find a consensus interim leader after deadly anti-corruption protests toppled the government in the worst violence in the Himalayan nation in decades © Pedro Pardo / AFP

Protesters set parliament, major government buildings and a Hilton Hotel on fire on Tuesday, 73-year-old KP Sharma Oli resigned as prime minister, and the army then took charge of the streets.

Nepal's army said on Friday that it had recovered more than 100 guns looted in the uprising, during which protesters were seen brandishing automatic rifles.

More than 12,500 prisoners who escaped from jails across the country during the chaos "are still at large", police spokesman Binod Ghimire told AFP.

Protests fed into longstanding economic woes in Nepal, where more than two-fifths of people are aged between 16 and 40.

Discussions are still heated among Gen Z ranks as they seek a radical political transition.

James Karki, 24, who was among the protesters, said he was hopeful for change.

"We started this movement so we could make a better Nepal," he said. "And I am positive that the army will listen."

© 2025 AFP

From Discord to Bitchat, technology at the heart of Nepal protests

 the government “seriously underestimated the power of social media”

ByAFP
September 12, 2025


A soldier uses a mobile phone during a curfew imposed to restore law and order in Kathmandu on September 12, 2025. From sparking protests to giving young people a platform to discuss their country's political future, social media was key to Nepal's uprising this week - Copyright AFP Pedro Pardo

From sparking protests that toppled the prime minister to giving young people a platform to discuss their country’s political future, social media was key to Nepal’s extraordinary uprising this week.

Fuelled in part by anger over flashy lifestyles flaunted by elites, young anti-corruption demonstrators mainly in their 20s rallied on Monday.

The loose grouping, largely viewed as members of “Gen Z”, flooded the capital Kathmandu to demand an end to a ban on Facebook, YouTube and other popular sites.

The rallies ended in chaos and tragedy, with at least 19 protesters killed in a police crackdown on Monday. The apps were restored, but protests widened in anger.

On Tuesday, other Nepalis joined the crowds. Parliament was set ablaze, KP Sharma Oli resigned as prime minister, and the army took charge of the streets.

Now, many activists are taking to the US group-chat app Discord to talk over their next steps.

One server with more than 145,000 members has hosted feverish debate about who could be an interim leader, with many pushing 73-year-old former chief justice Sushila Karki.

It is just one example of how social media has driven demands for change.

– ‘Fuelled the fire’ –

More than half of Nepal’s 30 million people are online, according to the World Bank.

Days before the protests, many had rushed to VPN services — or virtual private networks — to evade blocks on platforms.

Fears of a wider internet shutdown also drove a surge in downloads for Bluetooth messaging app Bitchat, created by tech billionaire Jack Dorsey.

“Tech played… an almost decisive role,” journalist Pranaya Rana told AFP.

“The whole thing started with young people posting on social media about corruption, and the lavish lives that the children of political leaders were leading.”

Hashtags such as #NepoKids, short for nepotism, compared the designer clothing and luxury holidays shown off in their Instagram posts to the difficulties faced by ordinary Nepalis.

One post liked 13,000 times accused politicians’ children of “living like millionaires”, asking: “Where is the tax money going?”

“NepoKids was trending all the time,” including in rural areas where Facebook is popular, said rights activist Sanjib Chaudhary.

“This fuelled the fire” of anger that “has been growing for a long time”, he said.

– ‘Seriously underestimated’ –

Deep dissatisfaction lies behind the social unrest in the Himalayan nation, among young people exasperated with slow economic development and political instability.

The government’s social media ban “wasn’t trying to suppress” the NepoKids trend, but the timing meant people “saw it as an attack on their freedom of speech”, Rana said.

A week ago, Nepal said it would block access to 26 social media platforms, from Facebook to X and LinkedIn, for failing to meet a deadline to register in the country.

Those that had registered, including TikTok and Viber, remained online.

Nepal has restricted access to online platforms in the past, including Telegram in July.

Last year, the government lifted a nine-month ban on TikTok after it agreed to comply with Nepali regulations.

The government wanted companies to give them the power to “prohibit broad categories of speech such as ‘misinformation’ or content deemed to disrupt ‘social harmony'”, Felicia Anthonio from the US digital rights group Access Now told AFP.

Swiss-based company Proton VPN said Monday that sign-ups from Nepal had shot up 6,000 percent in three days.

Interest rose in Dorsey’s Bitchat platform, which works offline and describes itself as way to resist censorship.

“There when you need it,” wrote Dorsey on X, citing a post describing a “sudden spike” in Bitchat downloads during the protests in Indonesia and Nepal.

Chaudhary said the government “seriously underestimated the power of social media”.

 

ISSCR statement on the scientific and therapeutic value of human fetal tissue research




International Society for Stem Cell Research





The International Society for Stem Cell Research (ISSCR), the largest professional organization of stem cell researchers from around the world, is concerned about a recent statement attributed to NIH that the agency will not renew research grants involving human fetal tissue (HFT), and that research with HFT is not conducted responsibly or transparently. In fact, research with HFT has been indispensable in advancing biomedicine and saving millions of lives, and it continues to play an essential role in accelerating research that benefits patients.

ISSCR President Hideyuki Okano released the following statement:

“Research with HFT and HFT-derived cell lines has been a cornerstone of biomedical progress since the 1930s. For decades, this work has been conducted with bipartisan congressional support under both Republican and Democratic administrations in the U.S. HFT is an invaluable tool for advancing our understanding of human development, infertility, and diseases like diabetes, Zika virus, HIV, and neurodegenerative disorders. Cell lines originally derived from HFT have contributed to the development of vaccines for polio, rubella, measles, chickenpox, shingles, rabies, and COVID-19. Despite significant progress in the development of organoids and animal models, HFT continues to provide unique biological insights that cannot yet be fully replicated by alternative research methods.

This critical work is governed by a robust ethical and legal framework that ensures responsible research conduct and public accountability. There is a longstanding oversight process for research using HFT that ensures it is scientifically meritorious, legal, and ethically sound. This framework requires thorough informed consent for tissue donation and prohibits individuals from profiting from acquiring, receiving, or transferring fetal tissue for research. These safeguards protect the rights of donors, uphold public trust, and ensure that research using HFT proceeds responsibly while continuing to deliver vital scientific advances.

We urge NIH to reject political pressure to discontinue research with HFT and instead reaffirm its role as a champion of evidence-based biomedical science.”

 

Hidden treasure from the Iron Age found in Sweden




University of Gothenburg




A complete plano-convex ingot has been found in Sweden for the first time. The results of the isotopic and chemical analyses carried out by archaeologists at the University of Gothenburg were unexpected. ”Due, in particular, to its shape and size, it seemed to us a Bronze Age artefact, but the ingot turned out to be made of a copper-zinc-tin-lead alloy, typical of the Iron Age and later periods”, says Serena Sabatini.

Plano-convex ingots are often made of copper, but can also be made of bronze or copper-based alloys. These ingots are a common find, especially in the Mediterranean, but also in continental Europe and along the Atlantic coast. They were used to transport metal throughout the Bronze and Iron Ages.

Initially, the archaeologists at the University of Gothenburg believed the Särdal ingot to date back to the Bronze Age. However, as it was found alone and could not be dated by its archaeological context, they decided to run isotopic and chemical analyses to determine its composition and suggest a possible chronology.

The analyses provided unexpected results as the ingot turned out to be made of a copper-zinc-tin-lead alloy that was typical of the Iron Age and later periods. 

”Thanks to the collaborative climate of the archaeometallurgy research world- we teamed up with a group of Polish scholars, who were working with some Iron Age finds which have the almost exact composition of our ingot.”, says Serena Sabatini.

The results show that unique, isolated finds, which are traditionally considered very difficult to interpret, can be given historical context and contribute to our understanding of the past when carefully analysed through an interdisciplinary approach that includes both archaeological and natural science methods.

”Networking and international collaboration are also important to unveil patterns and data that would remain unknown when one look exclusively at the local context. This work clearly shows the importance of teamwork and data sharing. Without the successful collaboration with our Polish colleagues, we would have never achieved such remarkable results!”, says Serena Sabatini.

The study uses well-established analytical methods in archaeometallury (which is the branch of archaeology specialized in the study of ancient metals), such as lead isotope and trace element analyses of metal finds. Such methods have been used since the 1980s to investigate the composition and the origin of the metal (in the sense that they enable to point out the minerary region from which the metal was extracted).

”What is new in this study- is that we went a step further, and by combining the obtained data with known historical and archaeological information, we managed to propose a historical context, for both the unique Särdal plano-convex ingot and the rod ingots from the Iława Lakeland area in northeastern Poland. Given the astonishing similarity of the metal composition in all those artefacts we also manage to strengthen earlier hypotheses about contacts and networking in the Baltic area during the Nordic pre-Roman Iron Age.” says Serena Sabatini.

The study is published in Journal of Archaeological Science.

 

Fortified foods and dietary supplements key to bone health in vegan diets




University of Helsinki






A study conducted at the University of Helsinki found that children and adults who follow a vegan diet had on average adequate intakes of calcium and vitamin D, nutrients important to bone health, but their bone metabolism differed from those who follow an omnivorous diet.

The MIRA2 study conducted at the University of Helsinki investigated bone metabolism and the intakes of nutrients critical to bone health, such as calcium, vitamin D and protein. The study involved children residing in Helsinki aged between two and seven who followed a vegan, vegetarian or omnivorous diet, as well as their caregivers.

The study subjects following a vegan diet adhered almost without exception also to the recommendations on the consumption of dietary supplements and fortified foods, and they had on average adequate vitamin D and calcium intakes. The children on a vegan diet had higher vitamin D intake than those on an omnivorous or a vegetarian diet due to more active consumption of vitamin D supplements with higher doses. On average, vitamin D status measured from blood was also adequate in all diet groups.

The study found that the more plant-based diets, namely vegan and vegetarian ones, were in adults associated with higher concentrations of bone formation and resorption markers, which may indicate accelerated bone metabolism. In contrast, more plant-based diets among children were associated with higher parathyroid hormone concentrations, which have been associated with more active bone resorption. While these observations can indicate long-term adverse effects on bone health, their clinical significance is unclear.

“The calcium naturally occurring in plant-based foods is fairly poorly absorbed. In fact, the widespread vitamin D and calcium fortification of plant-based dairy alternatives in Finland is important for the adequate intake of these nutrients among vegans and, consequently, for their bone health,” says Docent Suvi Itkonen from the Faculty of Agriculture and Forestry, University of Helsinki.

Many international studies have raised concerns about the potential adverse effects of vegan diets on bone health. However, these studies have typically targeted populations where vitamin D intake is low, the selection of vegan products on the market is narrow, and the consumption of fortified foods or dietary supplements is less widespread than in Finland. 

Vegan diets require careful planning especially for children

The researchers found that vegans and vegetarians had lower protein intake compared to those who followed an omnivorous diet, although on average it was adequate. Proteins are composed of amino acids.

“It’s possible that the poorer absorption and different amino acid composition of plant-based proteins compared to animal proteins partly explain the observed differences in bone metabolism, but more research is needed on the topic. In fact, we will next investigate amino acid intake among the MIRA2 subjects and the amino acid composition of vegan diets,” Itkonen says.

The MIRA2 dataset was collected in Helsinki, where vegan food in daycare centres and various vegan food products are abundantly available. The families who participated in the study were well versed in guidelines for vitamin D supplementation and fortified food consumption.

“People in the Helsinki Metropolitan Area live in a kind of veggie bubble. Due to that one has to keep in mind that the findings of the study are not directly applicable to the populations of other regions or countries,” Itkonen points out.

The nutrition recommendations published last autumn emphasise a predominantly plant-based diet, restricting meat consumption and moderating milk consumption. If a food is entirely excluded from the diet, it is important to replace it with nutritionally comprehensive alternatives. When planning a vegan diet for children and adolescents, a visit to a registered dietitian is recommended.

“In terms of bone health, it is essential when consuming plant-based drinks and yoghurt-like products to choose the option fortified with calcium and vitamin D. Children should take a daily vitamin D supplement throughout the year. If the daily diet contains no margarines, dairy products or plant-based drinks fortified with vitamin D, and if fish is eaten less than 2–3 times per week, it’s important to ensure adequate vitamin D intake, especially during the dark season, by taking a vitamin D supplement. Among vegans, the need for vitamin D supplementation is common,” Itkonen notes.

Other findings in the MIRA2 study related to, among other things, lipid metabolism, metabolomics and the intakes of other nutrients will be published later.

 

Scilly Isles cameras give glimpse of ‘natural’ UK waters


University of Exeter
Catsharks filmed by the remote underwater camera 

video: 

Catsharks filmed by the remote underwater camera

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Credit: Dr Owen Exeter





Underwater cameras around the Isles of Scilly have given scientists a glimpse of how sea life can thrive in well-protected UK waters.

Despite widespread degradation of UK seas from destructive fishing, pollution, and climate change, the waters surrounding the Isles of Scilly appear to be bucking the trend.

This new study used baited underwater cameras and found the Isles of Scilly’s waters support vibrant marine life including sharks, lobsters, octopuses and bluefin tuna.

The researchers say these relatively low-cost camera systems could be used to improve the monitoring and effectiveness of Marine Protected Areas (MPAs) – helping restore thriving seas around the UK.

The study was led by the University of Exeter, working with the Isles of Scilly Inshore Fisheries and Conservation Authority and Natural England.

“The richness and variety of marine life around the Isle of Scilly is wonderful to see,” said Dr Owen Exeter, from the Centre for Ecology and Conservation on Exeter’s Penryn Campus in Cornwall.

“Our cameras recorded nearly 12,000 individual animals, from 64 species, including large populations of commercially targeted species such as lobsters and small sharks.

“We also saw bluefin tuna – which have recently returned to UK waters after largely disappearing due to overfishing.

‘Healthy seas’

While the site isn’t entirely untouched by human activity, the team describes it as one of the UK’s most ‘near-natural’ marine ecosystems – largely protected from destructive practices such as bottom trawling, and with relatively low human impact due to the archipelago’s small population and well-managed fisheries.

“These waters haven’t recovered from severe damage – they’ve remained in comparatively good condition. By studying ecosystems like this, we can start to understand what a healthy UK marine environment should look like. This gives us a crucial reference point as we work to restore degraded areas elsewhere,” continued Dr Exeter.

The findings suggest that complex seabed habitats, such as reefs and mixed sediments which can be damaged by bottom trawling, host especially high biodiversity, underlining the importance of protecting these areas.

Bottom trawling – a focus of the recent David Attenborough film, Ocean - is permitted in some UK MPAs but the government is considering extending a ban to more areas.

‘Great option’

The cameras used in the study, known as Baited Remote Underwater Video Systems (BRUVs), offer a powerful tool for assessing whether MPAs are delivering measurable benefits for marine biodiversity when bottom trawling is excluded.

“MPAs are only as effective as the protections and monitoring in place to support them,” said Dr Kristian Metcalfe, Associate Professor in Marine Conservation Science at the University of Exeter.

“These camera systems allow us to track changes in species diversity and abundance over time, giving us vital evidence on whether conservation measures are working.

“They’re non-destructive, relatively inexpensive, and scalable – making them a great option for regular biodiversity assessments across large areas of our coastal seas.”

Jules Webber, from Natural England, said: “We have been really pleased to support Owen’s work for this PhD.

“BRUVs can provide invaluable evidence to help improve our understanding of the condition and effectiveness of our Marine Protected Areas.

“This project has really demonstrated how BRUVs could be a consistent, non-invasive and low-cost way to monitor these critical marine ecosystems long-term.”

The research has informed the Isles of Scilly being designated as an Important Shark and Ray Area (ISRA).

This recognition highlights the region’s significance for four shark species (primarily catsharks, with supporting species nursehounds, blue sharks, and porbeagle sharks) and provides an important tool to guide conservation and management efforts.

ISRAs are not regulatory or restrictive, but rather reflect areas of ecological interest and serve as a science-based framework to inform decision-making and strengthen the case for future funding and conservation initiatives.

The camera systems used in the study, developed by Blue Abacus, have two cameras that can be used estimate the size of individuals, providing rich ecological data for long-term marine monitoring.

Dr Exeter’s work was funded by a Natural Environment Research Council GW4+ Doctoral Training Partnership PhD Studentship – a case partnership between the Isles of Scilly Inshore Fisheries and Conservation Authority and Natural England.

The paper, published in the journal Ecological Applications, is entitled: “Application of spatially robust stereo baited remote underwater video sampling for quantifying fish assemblages in UK marine protected areas.”


Bluefin tuna filmed by the underwater camera [VIDEO] 


Crawfish filmed by the underwater camera [VIDEO] 

 

Cyclic triaxial tests: Evaluation of liquefaction resistance in chemically treated soils



Researchers explored the potential of stress-controlled and strain-controlled cyclic triaxial testing for liquefaction resistance evaluation of chemically treated soils




Shibaura Institute of Technology

Cyclic response, stress path, and post-test specimen condition under stress-controlled loading 

image: 

Researchers explore the potential of stress-controlled and strain-controlled cyclic triaxial testing for liquefaction resistance evaluation of chemically treated soils

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Credit: Professor Shinya Inazumi from Shibaura Institute of Technology, Japan. Source Link: https://www.sciencedirect.com/science/article/pii/S259012302502938X?via%3Dihub





Soil liquefaction can be a major threat to the infrastructure and built environments in an earthquake-prone area. This happens due to substantial loss of soil stiffness and strength due to applied stress. Loose, moderately granulated, sandy soil is more prone to soil liquefaction. Recognizing the urgent need to enhance urban resilience in seismic-prone regions, particularly in rapidly urbanizing areas vulnerable to such hazards, scientists are focusing on different mitigation techniques. Soil compaction technique is one of the effective methods developed to enhance the liquefaction resistance of the soil.

However, developing a proper evaluation method is also of utmost importance. Traditionally stress-controlled cyclic triaxial tests are done for the evaluation. However, the results are often inconsistent and this can lead to an overestimation of the resistance capacity. Also, focusing on sustainable options is an inevitability in the present times. So, the scientists are also trying to focus on formulating and testing environment-friendly grouting substances.

To bridge the methodological gaps and promote safer, eco-friendly ground improvement for the global infrastructure, Professor Shinya Inazumi from College of Engineering, Shibaura Institute of Technology (SIT), Japan, along with a small team of researchers, developed a strain-controlled testing method using cyclic triaxial. "We pursued this research after recognizing the urgent need to improve urban resilience to earthquakes," mentions Prof. Inazumi, talking about the motivation for the study. The findings were made available online  August 20, 2025, and published in Volume 27 of the journal Results in Engineering on September 01, 2025.

As a grouting solution, an environment-friendly formulation of colloidal silica (CS) and geothermal-recycled sodium silicate were used. Compared to conventional grouting solutions, this reduces carbon-dioxide emissions during production by approximately 60%. Three different concentrations of CS–six percent, eight percent, and 10 percent were tested. The stress-controlled test was conducted following previously established protocol. For the strain-controlled cyclic triaxial test, double-amplitude axial strain was maintained constant at five percent, simulating large cyclic deformations from earthquakes. Cumulative dissipated energy was evaluated as an alternative indicator of liquefaction potential. The phase transformation angle was evaluated. Cumulative dissipated energy as an unified evaluation index was also evaluated. Pore pressure-based criterion, strain-based criterion, and energy-based criterion were assessed to evaluate the resistance.

The test-result revealed that higher concentration of CS increases the resistance, with 10 percent concentration yielding the best result. Analysis of the cumulative dissipated energy confirmed that energy-based evaluation is a viable approach for assessing liquefaction resistance.

“This new method is superior to the present evaluation methods,” mentions Prof. Inazumi. “It reduces the need for multiple specimens, which makes it cost-effective and produces consistent, reproducible results.” The team also observed a linear relationship between dissipated energy and liquefaction resistance ratio (RL20, 5%) which can be a potential calibration path for integrating strain-controlled results into existing stress-based design charts. This can save time and improve previous test results significantly. The new method’s potential of being integrated in energy-based designs supports its use in performance-based seismic design frameworks, as proposed in recent studies.

“The research has profound real-world applications, especially in earthquake-prone regions,” says Prof. Inazumi. “One key application is retrofitting existing structures, based on the updated test results. Chemical grouting with CS can be used to mitigate liquefaction hazards in waterfront projects, such as expanding school buildings, residential complexes, and medical facilities near seawalls.”

Furthermore, this method can stabilize loose sands against lateral spreading. The eco-friendly nature of the silica formulation can also ensure the safety of marine environments. Additionally, owing to the low-vibration nature of this method, it could be ideal for crowded urban areas, aiding in the development of bridges, ports, and dams in regions such as Japan and California.

Taken together, integrating this new method of testing into global standards could save lives, minimize economic losses by providing precise, cost-effective liquefaction mitigating strategies.  In the future, the testing method can be used to evaluate other types of soil, other grout types, and testing methods. The study hugely contributes to the development of performance-oriented ground improvement design under seismic loading conditions.

 

***

 

Reference
DOI: 10.1016/j.rineng.2025.106875



About Shibaura Institute of Technology (SIT), Japan
Shibaura Institute of Technology (SIT) is a private university with campuses in Tokyo and Saitama. Since the establishment of its predecessor, Tokyo Higher School of Industry and Commerce, in 1927, it has maintained “learning through practice” as its philosophy in the education of engineers. SIT was the only private science and engineering university selected for the Top Global University Project sponsored by the Ministry of Education, Culture, Sports, Science and Technology and had received support from the ministry for 10 years starting from the 2014 academic year. Its motto, “Nurturing engineers who learn from society and contribute to society,” reflects its mission of fostering scientists and engineers who can contribute to the sustainable growth of the world by exposing their over 9,500 students to culturally diverse environments, where they learn to cope, collaborate, and relate with fellow students from around the world.

Website: https://www.shibaura-it.ac.jp/en/



About Professor Shinya Inazumi from SIT, Japan
Professor Shinya Inazumi graduated from Kyoto University in 2003. He is currently working as a Professor at SIT, Japan. His lab, the Geotechnical Engineering Laboratory, aims to manage and develop sustainable soil-based social infrastructure in harmony with the natural and social environment. His lab uses simulation techniques, along with data science and artificial intelligence for the research. He has more than 200 publications and is a recipient of multiple awards. He is a member of multiple academic societies like Japan Society of Civil Engineers and Geotechnical Society of Japan.