Digital twin can reveal alcohol consumption in crime cases

Linköping University

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Henrik Podéus Derelöv, PhD student at LiU.

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Credit: Marcus Pettersson

Using a so-called digital twin, it is possible to predict with greater precision than at present how much alcohol a person has consumed and at what time. The study was conducted by researchers at Linköping University and the Swedish National Board of Forensic Medicine. The findings, published in Scientific Reports, pave the way for more reliable investigations into crimes where alcohol is believed to have been involved. 

In criminal investigations, it can be crucial to know when a person last consumed alcohol in order to determine responsibility with certainty. However, according to Robert Kronstrand, chief toxicologist at the Swedish National Board of Forensic Medicine and adjunct professor at Linköping University, current techniques, where alcohol levels are measured in exhaled breath and blood samples, are too imprecise:

“One thing we do is assess when a person last drank alcohol, for example in a drink-driving case. The person has crashed, been unobserved for a period before the police arrive, and when tested is positive for alcohol. The person then says that all intake occurred after the journey, and that the blood test therefore doesn’t reflect the situation while they were driving,” he says.

This argument is known as post-incident drinking, or hip flask defence, and can be difficult to disprove using current techniques. Another situation where alcohol consumption is an important piece of the puzzle in investigations is in various types of violent crime or accidents.  

“Then we want to be able to extrapolate backwards from an analytical result that may have been obtained three, five or ten hours after the event, and estimate the alcohol level at the time of the offence and perhaps also when the person stopped drinking,” says Robert Kronstrand.

To achieve this, the research group at Linköping University, together with the Swedish National Board of Forensic Medicine, has developed a computational model for a so-called digital twin. Digital twin technology can, in simplified terms, be described as a virtual model of a person where individual differences such as sex, age, height, weight and medical conditions are taken into account when calculating alcohol levels in the body.

In the LiU researchers’ model, data from a person’s exhaled breath, blood and urine samples are analysed. These data consist of various metabolites from alcohol metabolism, found in blood and urine. All this information is then used together with the digital twin to generate individualised results on drinking patterns.

According to the researchers, the digital twin could also take into account gastric emptying rates and alcohol absorption, which depend on food intake or the type of alcoholic beverage consumed.

“We want to explore alcohol intake and how it breaks down in the body. This involves measurements of both alcohol directly in blood and urine, and secondary  metabolites that arise during the breakdown of alcohol,” says Henrik Podéus Derelöv, doctoral student at the Department of Biomedical Engineering at Linköping University (LiU).

The aim is to develop a user-friendly tool for forensic investigations where sample data are entered, and the model provides probable answers as to when a person last drank and how much. According to Henrik Podéus Derelöv, the results are intended as a support in assessments and do not replace the overall forensic medicine evaluation.

“The model will always involve inherent uncertainty, but that also applies to current methods, and the ambition is to create a more flexible tool.”

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Journal

Scientific Reports

DOI

10.1038/s41598-026-44093-4 

Article Title

A digital twin framework for forensic reconstruction of alcohol intake via fast and slow metabolite kinetics

Mainz University and the German Police University launch joint research project on qualified language mediation for efficient forensic communication surveillance

German Federal Ministry of Research, Technology, and Space is funding the project with around EUR 880,000 through its Validation of the Technological and Social Innovation Potential of Scientific Research (VIP+) program

Johannes Gutenberg Universitaet Mainz

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An intercept interpreter / translator (IIT) at work

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Credit: photo/©: Katja Preusse / German Police University

In cases involving serious criminal offenses, the police are permitted to conduct acoustic surveillance of telephones, private premises, or vehicles to record conversations of suspected offenders or to analyze chat communications. When criminal groups communicate in languages other than German, language mediators or so-called intercept interpreters-translators (IITs) are tasked with rendering the content into German. Their role extends beyond mere linguistic transfer to include the communication of additional information relevant to the investigation. The results of their work also serve as evidence in court proceedings. To ensure effective crime prevention and prosecution, the police, the prosecuting attorneys, and courts depend on precise intercept interpreting and translation.

This is the very topic of the new research project on "Qualified language mediation for efficient forensic communication surveillance", QSEK for short. The interdisciplinary research consortium – involving academics from translation studies, law, and criminology – aims to raise awareness of the specific challenges and importance of intercept interpreting and translation among law enforcement, the judiciary, and the language services sector. It seeks to develop general standards for the legally sound use of language-mediated evidence and to provide targeted training for both language professionals and police personnel.

For the police and the judiciary, the professionalization of IITs is expected to yield significant cost savings as high-quality translation enhances investigative efficiency and reduces the risk of misinterpretation. At the same time, standardized procedures facilitate the work of prosecuting authorities, enable the assessment of AI-based applications, and strengthen the legal reliability of evidence derived from intercept interpreting and translation.

For IITs themselves, the introduction of a standardized qualification profile creates opportunities to acquire both specialized translation and forensic competencies, as well as to prepare themselves for the professional use of AI technologies. Ultimately, these innovations contribute to fair and transparent criminal proceedings and uphold the right of defendants to be heard, thereby reinforcing public trust in law enforcement and judicial processes.

The practical implementation of the project results is of central importance. In the framework of the Validation of the Technological and Social Innovation Potential of Scientific Research (VIP+) program, this transfer will be supported by the Higher Regional Court of Düsseldorf as innovation mentor. In addition, the project is supported by an advisory board comprising the German Federal Public Prosecutor at the Federal Court of Justice and representatives from the German Federal Criminal Police Office, the Baden-Württemberg State Criminal Police Office, the German Federal Association of Interpreters and Translators (BDÜ), the German Institute for Human Rights, and criminal defense attorney Dr. Alexander Paradissis (WisteV). This broad backing underscores that QSEK addresses an urgent and widely recognized need.

The project supervisors, namely Professor Cornelia Griebel of the Faculty of Translation Studies, Linguistics, and Cultural Studies of Johannes Gutenberg University Mainz (JGU), Chief of the Criminal Division Joachim Faßbender, and Professor Lars Berster of the German Police University (DHPol), welcome this strong support from key stakeholders. They are confident that QSEK will provide a comprehensive solution to current challenges in intercept interpreting and translation. By integrating academic research, practice-oriented training, and support for technological innovation, the project is intended to make a sustainable contribution to high-quality and efficient language mediation in this field.

The German Federal Ministry of Research, Technology, and Space (BMFTR) is providing financial support of EUR 878,799 to the QSEK project through its VIP+ validation funding program.


Related links:

• https://www.validierungsfoerderung.de/validierungsprojekte/qsek – Validation project "Qualified language mediation for efficient forensic communication surveillance" (QSEK) [in German]

 

KERI resolves ‘interfacial instability’ in all-solid-state battery commercialization

Dr. Nam Ki-Hun’s research team achieves stable lithium metal interfaces via a nano-tin (Sn) interlayer and demonstrates high performance under low pressure (2 MPa), earning front cover recognition in ‘Advanced Energy Materials’.

Peer-Reviewed Publication

National Research Council of Science & Technology

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KERI’s research outcome on the “nano-tin interlayer control technology” was featured as a front cover article in Advanced Energy Materials.

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Credit: Korea Electrotechnology Research Institute

A research team led by Dr. Nam Ki-Hun at the Battery Materials and Process Research Center of the Korea Electrotechnology Research Institute (KERI) has successfully developed a nano-tin (Sn) interlayer control technology to address interfacial instability between the lithium metal anode and solid electrolyte, a critical hurdle to the commercialization of all-solid-state batteries, often hailed as the next generation of batteries. The research was featured as a front cover article in Advanced Energy Materials (IF=26.0), a globally renowned journal in the field of energy and materials science ranked within the top 2.7% worldwide and has attracted widespread international recognition.

All-solid-state batteries are regarded as the “dream battery” due to their significantly reduced risk of fire. By replacing conventional graphite anodes with lithium metal, they offer improved energy density but a key technical challenge remains. “Interfacial resistance” arises from unstable physical contact between the solid electrolyte and electrode materials, thereby impeding efficient ion transport. In addition, lithium grows in tree-like structures during repeated charge–discharge cycles, called dendrite, reducing battery lifespan.

Laboratories have relied on adopting high external pressure in the range of tens of megapascals (MPa) or complex and costly coating methods to stabilize interfaces. However, such high-pressure systems when applied to real electric vehicles, etc. could outweigh the benefits as the pressurization system itself may become heavier than the battery. As a result, significant increase in manufacturing costs and reduced space efficiency within vehicles pose critical barriers to the commercialization of all-solid-state battery technology.

To address this challenge, KERI developed a thin interlayer composed of nano tin powder (nano Sn), a material with strong lithium affinity and storage capability, and stamped the interlayer onto the surface of the lithium metal anode through a transfer printing process. It reduces physical damage to the lithium metal by decreasing interfacial resistance, and also serves as an ion transport pathway, significantly lowering the overall resistance of the cell.

The research team applied this technology to a pouch cell and achieved over 81% capacity retention after 500 cycles even under a low pressure of 2 MPa. In addition, the cell delivered an energy density of >350 Wh/kg, exceeding that of conventional lithium-ion batteries (150–250 Wh/kg). This is a world-leading achievement highlighting the potential of all-solid-state batteries to maximize performance without heavier systems or additional costs.

This study was conducted in collaboration with Dr. Kim Youngoh, an emerging researcher at the Next-Generation Battery Research Center of KERI. Using simulations based on first-principles calculations, the team clarified how tin-based alloys control lithium transport and reduce interfacial resistance down to the atomic and electronic structure levels. Rather than being limited to experimental outcomes, the work offered a clear demonstration of scientific principles needed for designing next-generation battery materials by drawing on advanced theoretical and computational capabilities.

Dr. Nam Ki-Hun of KERI noted “The study is meaningful in that it secures both large-area scalability and interfacial stability, two essential factors for the commercialization of all-solid-state batteries, while also presenting a practical solution.” He added “Efforts will continue to further refine the technology for real manufacturing processes so that it can become a key enabler for future industries depending on high-performance batteries, including electric vehicles, humanoid robotics, and energy storage systems (ESS). Dr. Ha Yoon-Cheol, co-corresponding author and project leader, also underscored “All-solid-state batteries are central to the global race for battery leadership. This study result represents a meaningful progress toward technological independence and securing a competitive advantage. It will contribute significantly to strengthening the strategic technological capabilities of Korea going forward.”

The study lists Kim Garam (M.S., UST) and Im So-Jeong (KERI–Changwon National University joint program) as co–first authors. A domestic patent application has been completed for this technology. The work was carried out with support from KERI’s research program and the Global Top Strategy Research Initiative (GT-3) of the Ministry of Science and ICT. <KERI>

KERI reduced the growth of lithium dendrites during the charge–discharge of all-solid-state batteries by adopting a nano-tin interlayer.

KERI tested this technology on a large-area pouch cell to evaluate performance and achieved excellent capacity retention and energy density.

Credit

Korea Electrotechnology Research Institute

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Journal

Advanced Energy Materials

DOI

10.1002/aenm.202505910 

Article Title

Interface Stabilization via In Situ Lithiated Sn Interlayer in All-Solid-State Li-Metal Batteries: Toward Pellet-Type Cell to Pouch-Type Cell

 

The rush for critical minerals echoes oil extraction injustice as harms fall on world's most vulnerable, UN scientists warn

The race to build EVs, renewable energy systems and AI infrastructure, with benefits flowing mainly to wealthy nations, is driving severe, largely hidden costs borne disproportionately by the poor in Africa and South America, UN University investigation 

United Nations University

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Critical minerals and their functional roles in energy transition and advanced technologies (source: UNU-INWEH)

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Credit: United Nations University Institute for Water, Environment and Health (UNU-INWEH)

Richmond Hill, Ontario, Canada – Mining critical minerals such as lithium and cobalt fuels the ‘green’ energy and digital transitions essential to meeting climate goals. But building the technologies that enable a sustainable future is generating severe, hidden environmental and health crises that the world is failing to track or address, warns a new report by the United Nations University Institute for Water, Environment and Health (UNU-INWEH), known as the UN’s Think Tank on Water.

The investigation finds that systemic global failures are allowing the costs of critical minerals extraction to fall disproportionately on some of the world's most vulnerable communities, while the benefits accumulate elsewhere in the form of electric vehicles (EVs), renewable energy systems, and artificial intelligence (AI) infrastructure. The report does not question the need for clean energy systems or the digital infrastructure underpinning them. Instead, it asks who is paying for and benefitting from humanity’s progress in those areas, and finds a deeply unjust answer.

“Technological disruptions are needed and useful. But we should be aware of and proactively address their unintended consequences if we want the whole world to equally benefit from them,” says UNU-INWEH Director Kaveh Madani, who led the investigation team. “You cannot call a transition green, sustainable, and just if it simply moves the environmental harm from the rich to the poor, and from one group of people or region to another.”

The report, Critical Minerals, Water Insecurity and Injustice, underlines the intense water requirements of critical minerals extraction and that communities living closest to mining operations are paying a steep price in contaminated water, water scarcity, lost livelihoods, and serious health consequences. 

In 2024, the report says, global lithium output of roughly 240,000 tonnes consumed an estimated 456 billion litres of water, equivalent to the annual domestic water needs of 62 million people in sub-Saharan Africa, roughly the population of Tanzania.

In Chile's Salar de Atacama, lithium mining alone accounts for up to 65% of regional water usage, intensifying competition with agriculture and domestic needs and driving dramatic groundwater depletion. Between 1990 and 2015, water tables in areas with brine wells dropped by up to nine metres. 

And lithium mining in Bolivia's Uyuni region is making it increasingly difficult for communities to grow quinoa, their economic and nutritional staple. 

Globally, about one-sixth (16%) of critical minerals reserves are located in high water-stress regions, while 54% of energy transition minerals sit on or near indigenous territories.

The environmental damage extends well beyond water consumption. For every tonne of hard-to-extract rare earth minerals produced, approximately 2,000 tonnes of toxic waste are generated. In 2024, global rare earth production generated an estimated 707 million metric tonnes of toxic waste, enough to fill about 59 million garbage trucks – a number of trucks that could form a queue circling the equator 13 times.

The 21st century’s oil

The Paris Agreement gives urgency to the extraction of critical minerals to reduce the carbon-intensity of human activities. Yet this creates a new ‘paradox’: meeting global climate targets would require a ninefold increase in lithium demand and a doubling of cobalt and nickel demand by 2040. 

“Without effective control mechanisms, the very targets designed to protect the planet can accelerate water, and health, and injustice crises in the communities least responsible for causing climate change,” says Prof. Madani, recently named the Stockholm Water Prize Laureate for 2026. “The world is rushing to build a cleaner energy future, and we support that urgency. But our investigation proves that the mining operations powering that transition are contaminating drinking water, destroying agricultural livelihoods, and exposing children to toxic heavy metals in some of the world's most vulnerable communities.”

Demand for graphite and other minerals essential to the energy and digital transition is projected to rise four or five times by 2050.

Referring to critical minerals as the ‘oil of the 21st century,’ the report draws a sobering parallel to the fossil fuel era, noting that the benefits of past resource extraction rarely reached the communities that bore its costs. Without deliberate policy intervention, it warns, the energy transition risks repeating that pattern, creating new "sacrifice zones" in mineral-rich but economically-marginalised regions.

Health burden falls hardest on women and children

Mining-related water contamination is creating serious public health emergencies. In the Democratic Republic of Congo (DRC), for example, a major cobalt producer, 72% of people living near mining sites reported skin diseases, and 56% of women and girls reported gynecological problems. 

Birth defect rates in maternal wards near DRC mining areas are markedly elevated compared to those farther away, including neural tube defects (which can lead to serious infant brain and spine defects) at a rate of 10.9 per 10,000 births and lower limb defects at 8.8 per 10,000 births. 

The psychosocial toll is also documented. Residents of mining communities in Calama, Chile and Mibanze, DRC describe living in constant fear, anxiety, and a sense of being 'sacrificed' so that wealthier regions can advance. Studies link water insecurity and chronic pollution exposure to elevated rates of anxiety, depression, and in extreme cases, suicide.

And approximately 30% of mining sites in the DRC employ children, who typically lack basic health and safety protections.

In the DRC, more than 80% of mineral output is controlled by foreign industrial mines, limiting local economic gains. Despite the country's vast mineral wealth, over 70% of the DRC's population lives on less than $2.15 per day.

“The green energy transition is among the most important undertakings of our time. But the evidence we've gathered shows that the communities doing the actual digging, breathing the dust, and losing access to clean water are largely excluded from its benefits,” says UNU-INWEH scientist Dr. Abraham Nunbogu, the report’s lead author. “If we don't correct the governance failures driving this, we will have built the clean energy economy of the future on the same extractive injustices as the fossil fuel economy of the past.”

Urgent policy action required

The report calls for a fundamental shift in how the global community governs critical mineral supply chains. 

Key recommendations include mandatory international due diligence standards to replace voluntary compliance, legally binding mechanisms for ethical sourcing and environmental justice, strict pollution and wastewater controls including zero-discharge systems, and independent monitoring of water use and heavy metal contamination.

The report also calls for investment in circular economy solutions, including advanced recycling of batteries, electronics, and renewable energy components, to reduce pressure on primary extraction.

The report notes that the issues bear directly on progress towards UN Sustainable Development Goals 6 (clean water and sanitation), 3 (good health and well-being), 1 (no poverty), 7 (affordable and clean energy), and 10 (reduced inequalities).

“This rigorous, evidence-based investigation by UNU scientists addresses a problem the world urgently needs to confront,” says Prof. Tshilidzi Marwala, UN Under-Secretary-General and Rector of the United Nations University. “A transition that deepens poverty, undermines access to clean water, and concentrates health burdens on the world's most marginalized communities is not a transition toward the UN’s Sustainable Development Goals. It is a step away from them. We cannot give up on the digital transition but we need to do it right.”

Drawing on empirical analyses, scientific studies, and field evidence from the Lithium Triangle, the Democratic Republic of the Congo, and other high-risk extraction regions, the report presents what the authors describe as one of the most overlooked injustices of the global sustainability transition.

Importantly, the report makes clear this is not exclusively a problem of distant or developing regions. The Thacker Pass lithium mine in Nevada, the largest known lithium deposit in the United States, would require up to 3.5 billion litres of water annually, largely by diverting water rights from farming communities in the Quinn River Valley. 

In Canada, the 2014 Mount Polley copper/gold mine disaster in British Columbia released roughly 25 million cubic metres of toxic waste into rivers and lakes, contaminating drinking water sources and devastating Indigenous communities. The report calls it one of Canada's worst mining-related environmental failures.

“Water insecurity is not a side effect of critical mineral mining, it is a systemic outcome of how the global supply chain is currently designed and governed,” says Prof. Madani. “Without binding international standards, mandatory disclosure, and genuine community co-governance, the demand surge projected for the coming decades will make the current situation dramatically worse.”

The report argues that without binding global rules, the current system will continue to externalize environmental and health costs.

Key recommendations include:

• Mandatory international due diligence standards to replace voluntary compliance, with legally binding mechanisms for ethical sourcing and environmental justice
• Strict pollution and wastewater controls, including zero-discharge systems, and independent monitoring of water use and heavy metal contamination
• Investment in circular economy solutions -- including advanced recycling of batteries, electronics, and renewable energy components -- to reduce pressure on primary extraction
• Legally mandated benefit-sharing agreements that direct a fair share of mining revenues to affected communities for health, water, and education services
• Legal enshrinement of Free, Prior and Informed Consent (FPIC) for Indigenous communities whose lands are affected by extraction
• Robust public health systems and mandatory Health Impact Assessments in mining regions, with companies required to contribute financially
• Investment in low-water extraction technologies such as direct lithium extraction (DLE) to reduce freshwater consumption

“The data collected for this report makes a stark case, documenting severe health and environmental outcomes in communities that will probably never own an electric vehicle or benefit from the technologies their land is being destroyed to build, in the foreseeable future” says Dr. Nunbogu. “These hidden costs of the energy transition remain largely invisible to regulators and the public because reliable, publicly accessible data on water usage and pollution at specific mining sites remains scarce. Without open and verifiable data, we cannot hold supply chains accountable, and we cannot ensure that the transition is equitable. That is not a technical failure, it is a governance failure.”

By the numbers

Demand

• Demand for critical minerals tripled between 2010 and 2023
• Lithium demand rose 30% in 2022 alone; cobalt and nickel demand grew 70% and 40% respectively from 2017 to 2022
• Total global trade value of critical minerals exceeded USD 320 billion by 2022
• Demand projected to more than double by 2030 and quadruple by 2050
• Graphite, lithium, and cobalt demand could rise by nearly 500% by 2050 relative to 2020 levels
• Meeting Paris Agreement targets would require a ninefold increase in lithium demand and a doubling of cobalt and nickel demand by 2040

Water

• 1.9 million litres of water required to produce one tonne of lithium
• An average lithium mine producing 11,000 tonnes annually uses roughly 20 billion litres of water -- enough to cover the annual domestic water needs of 2.8 million people in sub-Saharan Africa
• 2024 global lithium output (excluding US): ~240,000 tonnes, requiring an estimated 456 billion litres of water -- equivalent to the annual domestic water needs of 62 million people in sub-Saharan Africa
• Lithium mining accounts for up to 65% of regional water usage in Chile's Salar de Atacama
• Thacker Pass mine (Nevada, USA) would require up to 3.5 billion litres of water annually
• Water table in Atacama brine-well areas dropped by up to 9 metres from 1990 to 2015
• 16% of critical mineral mining sites are in areas already classified as water-stressed
• 54% of energy transition mineral projects are on or near indigenous peoples' lands

Toxic waste

• Each tonne of rare earth elements produced generates ~2,000 tonnes of toxic waste overall, plus 1 tonne of radioactive residue and 75 cubic metres of wastewater
• 2024 global rare earth production generated an estimated 707 million metric tonnes of toxic waste -- equivalent to ~59 million loaded garbage trucks, or the annual municipal waste of approximately 1.4 billion people
• ~70% of that waste (490 million metric tonnes) was generated in China

Concentration of reserves and production

• Africa holds 30% of the world's critical mineral reserves
• DRC, Madagascar, and Morocco hold over 50% of global cobalt deposits; DRC's global cobalt production share has remained above 60% from 2020 to 2024
• South Africa holds ~90% of global platinum reserves and accounts for ~70% of global production
• The Lithium Triangle (Argentina, Bolivia, Chile) holds over 50% of world lithium reserves
• Indonesia holds 42% of global nickel reserves and in 2023 accounted for 51% of global nickel production
• Over 80% of DRC mineral output is controlled by foreign industrial mines; Indonesian companies control less than 10% of national nickel production

Health impacts in DRC

• 72% of respondents near DRC mining sites reported skin diseases
• 56% of women and girls reported gynecological issues; 14% reported similar issues among teenage girls
• Neural tube defects near DRC mining areas: 10.9 per 10,000 births
• Lower limb defects: 8.8 per 10,000 births; cleft lip/palate: 7.2 per 10,000; abdominal wall defects: 6.4 per 10,000
• Cobalt concentrations found to be higher in umbilical cord blood than in maternal blood at delivery
• ~30% of DRC mining sites employ children, often without basic health or safety protections; children as young as seven work without protective equipment

Poverty and inequality

• 73.5% of DRC's population lives on less than $2.15 per day
• 64% of DRC's population lacked basic drinking water access in 2024 -- despite the country holding more than 50% of Africa's freshwater reserves
• Namibia, Zambia, and DRC hold over 30% of world critical mineral deposits, but most profits flow to multinational corporations and mining companies in the Global North
• Indonesia: domestic companies control less than 10% of national nickel production

 

Report Information

Nunbogu, A., Farsi, A., Matin, M., Madani, K. (2026). Critical Minerals, Water Insecurity and Injustice. United Nations University Institute for Water, Environment, and Health (UNU-INWEH), Richmond Hill, Ontario, Canada, doi: 10.53328/INR25ABN002

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About UNU-INWEH

Marking its 30th anniversary of operation in 2026, the United Nations University Institute for Water, Environment and Health (UNU-INWEH) is one of 13 institutions that comprise the United Nations University (UNU), the academic arm of the UN. 

Known as 'The UN’s Think Tank on Water', UNU-INWEH addresses critical water, environmental, and health challenges around the world. Through research, training, capacity development, and knowledge dissemination, the institute contributes to solving pressing global sustainability and human security issues of concern to the UN and its Member States. 

Headquartered in Richmond Hill, Ontario, UNU-INWEH has been hosted and supported by the Government of Canada since 1996. With a global mandate and extensive partnerships across UN entities, international organizations, and governments, UNU-INWEH operates through its UNU Hubs in Calgary, Hamburg, New York, Lund, and Pretoria, and an international network of affiliates.

unu.edu/inweh

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DOI

10.53328/INR25ABN002 

Article Title

Critical Minerals, Water Insecurity and Injustice

Article Publication Date

29-Apr-2026