Tag: Engineering

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  • Making space for women in STEM

    Making space for women in STEM

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    Judy Keir, Chief People Officer at SMS plc, discusses gender diversity in the STEM industry and what can be done to encourage more women to study STEM subjects.

    In 1977, International Women’s Day first came to mainstream attention following its adoption by the United Nations. However, its origins can be traced back to the US as early as the early 1900s.

    Since then, 8 March has become the day that celebrates the achievements of women across the globe. A lot has been achieved over the past fifty years, but we still have a long way to go if we are to truly eliminate the bias and discrimination surrounding gender that still exists in society.

    Public and private organisations of all sizes and across all sectors have an important role to play in taking action to drive gender parity. It seems that positive action is taken every year on International Women’s Day from organisations to show how they are, or can, put their best foot forward. For example, taking the time to champion female co-workers on their business wins or launching new initiatives to support women through various life stages.

    However, this can often be a little performative and a tick-box exercise. We need a little less conversation and a little more action, please. There is always more work to instil empowerment in the workplace. It simply doesn’t happen overnight.

    This is especially true in Science, Technology, Engineering and Mathematics (STEM). STEM remains a male-dominated industry – according to STEM Women, only 26% of women comprise the industry’s workforce.

    However, there are fantastic examples of businesses bucking the trend and showing the STEM industry how to get it right. At SMS, we have over 457 women, 27 in senior roles – but we know much more must be done.

    There are also many high-profile, iconic women in STEM, and over the past few years, we have seen growth in government campaigns in schools and colleges, encouraging girls to study STEM subjects beyond GCSE.

    It’s vitally important to continue promoting the bountiful career opportunities for women in STEM, even in roles where there are typically fewer women, for example, dual fuel engineers.

    SMS continues to focus on increasing these numbers by working with schools to raise awareness of engineering and technician careers at an earlier age. One of the best ways of doing this is by giving young females a role model to look up to.

    One of our employees, Lisa Nicholas, who changed career at 37 to become a fully qualified Dual Fuel Engineer, is a perfect example of this.

    Driving purpose through EDI initiatives

    It’s not just externally where the action needs to happen. Giving recognition to those when it is deserved is always good business practice – regardless of their gender.

    For the longevity of businesses in the STEM field, we must sit up and accommodate women. Even if businesses are still on their journey in terms of the Equality, Diversity, Inclusion (EDI) or purpose-driven initiatives needed to support women in the workplace, it’s never too late to start.

    Every business must start somewhere; Rome wasn’t built in a day. From offering enhanced maternity or adoption pay to providing paid time off for fertility treatment or in the sad event of a miscarriage, there are simple ways to offer support initiatives for women at work.

    SMS offers the above to female employees throughout the different stages of their lives and has a menopause support group and emergency packs available for those difficult times. Other EDI initiatives businesses can consider include annual Equal Pay Audits to ensure pay equity and fairness.

    Internal EDI forms and campaigns to support the completion of these can also be highly effective initiatives to help collect vital anonymous data about workforce diversity. These enable businesses to focus positive actions in the right areas and identify and remove any barriers that might exist in businesses regarding diversity and inclusion. This initiative was highly successful at SMS, as through campaigning, we’ve doubled our EDI survey completion rates.

    Industry progress is still needed to advance women in STEM

     While progress is great, it must be understood within the current context of huge gender disparity in the STEM industry. We are not immune to this, which is reported publicly as part of SMS’ Gender Pay Gap obligations. However, there is much work to be done in the industry.

    Along with the gender pay gap, there is much to be said for encouraging young women to enter STEM industries from a much younger age. A crucial part of any EDI initiative is to emphasise supporting the wider levelling up agenda and the communities within which our employees live.

    For example, partnering with local schools to ensure young girls have exposure to the STEM industry and understand the career opportunities that are available to them. This type of community outreach isn’t hard or costly. Still, it is imperative to address the gender discrepancy in the STEM industry, and it is a simple way that businesses can make a difference.

    This type of activity is achievable by any business in the STEM field, and business leaders looking to make a difference can easily set up similar initiatives. Additionally, championing female team members who take on new career paths is vital.

    The industry has a way to go regarding EDI initiatives to encourage and welcome women, but that won’t stop us from celebrating all of the incredible work women in STEM have already achieved.

    More than ever, it’s important that we shout about it from the rooftops. It’s also important to note that EDI initiatives certainly don’t stop with women – but it’s a strong place to start for those businesses looking to begin or continue their journey to becoming a fairer workplace.

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  • Scientists Are Unlocking the Hidden Minerals in Produced Water

    Scientists Are Unlocking the Hidden Minerals in Produced Water

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    Brine Water Valuable Minerals

    The water recovered from hydrocarbon reservoirs contains critical minerals that are key to many technical and industrial operations. Credit: Texas A&M Engineering

    In an ironic twist, a treasure trove of critical minerals is dumped out with water considered too polluted and expensive to clean.

    Texas A&M University researcher Dr. Hamidreza Samouei is investigating the components of produced water and says this waste byproduct of oil and gas operations contains nearly every element in the periodic table, including those of significant interest to national economies.

    His goal is to treat the water using unwanted carbon dioxide (CO2) in stages to recover these valuable elements and ultimately produce fresh water for agricultural use once the processes are complete.

    “Recognizing the latent value within produced water can offer tangible solutions to some of the world’s most pressing environmental challenges, from CO2 emissions to the increasing scarcity of certain minerals and water itself,” said Samouei, a research assistant professor in the Harold Vance Department of Petroleum Engineering.

    Samouei’s “brine mining” research was featured in a January 2024 article in the Society of Petroleum Engineers’ Journal of Petroleum Technology titled “Liquid Goldmine: unlocking the Critical Mineral Potential of Produced Water using Carbon Dioxide.” He introduced the topic at the Middle East Water Week Conference and Exhibition held in December 2023 in Saudi Arabia and reported his most recent discoveries at the Annual Produced Water Society Conference on February 2024 in Houston, Texas.

    Why is produced water thrown away?

    Water accumulates in subsurface areas where geological functions happen, like hydrocarbon reservoirs, and it dissolves and stores vast quantities of minerals and other elements. During oil and gas operations, an average of six 42-gallon barrels of this “produced” water are recovered for every one barrel of oil, and in rare cases, up to a staggering ratio of 500 to 1. It is up to 10 times saltier than seawater and contains about 6,000 times more minerals.

    Brine Mining Infographic

    Once produced water is separated from oil, the intended process involves a brine mining process to recover critical minerals and other elements before the water is cleaned for specific agriculture operations or for use in fracturing operations to recover more oil. Credit: Texas A&M Engineering

    In 2020, the annual global quantity of produced water recovered from oil and gas operations surpassed 240 billion barrels, with Texas alone recovering 33 million barrels daily. The oilfields of the Permian Basin in Texas generate more produced water than all other U.S. shale plays combined. Treating this vast volume is cost-prohibitive, so produced water is mainly considered a waste product and injected in subsurface disposal fields for safe containment.

    The hidden values in brine

    Since everything in produced water has never been cataloged, Samouei’s research began with the basics. He collected produced water samples around the U.S. and created a standardized method of analyzing the water’s content. That’s when he learned it contained nearly everything listed in the periodic table of elements.

    Samouei’s findings included critical minerals like lithium, rubidium, cesium, gallium, and platinum group metals – substances fundamental to the current and future technologies advancing computer, energy, and transportation industries. More importantly, like other brines, produced water featured less expensive but abundant quantities of sodium, potassium, magnesium, and calcium – used in manufacturing processes, fertilizer production, and other industries.

    All these minerals can be far more lucrative than the oil that comes up with produced water, so water reclamation costs could be easily offset by selling the recovered minerals.

    A better treatment

    Samouei explained that while desalinating produced water has been considered, the approach of first mining all the salt and minerals before treating the water had not been explored.

    Much of his current research centers on developing the best flow of methods for extracting valuable minerals from brine in stages of refinement using CO2 desalination, which he says is “a groundbreaking approach to targeted mineral recovery from produced water.” The process includes a variety of filtration techniques, such as ultrafiltration and nanofiltration, and even utilizes reverse osmosis.

    Commercialization potential

    The research is creating a baseline for brine mining, whether using produced water or other brackish sources, but Samouei said further development would need a funding source. Government sponsors are concentrating on critical mineral mining in places such as the sea floor or even asteroids, not on something as close to home as produced water.

    Samouei said he hopes to change the oil and gas industry’s view of produced water, first to see it as a lucrative means of receiving money and later, perhaps in 10 years, as a source for their own mining operations.

    “Produced water may not be beautiful if we look at it as a waste,” he said, “but it will be impactful to the world’s next generations if we look at it as a resource.”

    Reference: “Liquid Goldmine: Unlocking the Critical Mineral Potential of Produced Water Using Carbon Dioxide” by Jennifer Presley, 1 January 2024, Journal of Petroleum Technology.



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  • Well-matched vibrations cool electronic hot spots

    Well-matched vibrations cool electronic hot spots

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    Nature, Published online: 05 March 2024; doi:10.1038/d41586-024-00529-3

    Diamond layers can help to dissipate the heat generated by high-power semiconductor devices. This effect has now been enhanced by adding layers of materials and engineering their crystal-lattice vibrations to be compatible at the interfaces.

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  • laying the foundations for self-healing machines

    laying the foundations for self-healing machines

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    soft robot resembling a four-legged starfish on black background

    This soft-bodied robot knows when it has been damaged and can heal itself.Credit: Hedan Bai

    Inspiration can come from just about anywhere. For Robert Shepherd, a roboticist at Cornell University in Ithaca, New York, the source was a football injury 20 years ago, when he tore his anterior cruciate ligament. He needed surgery to re-attach the ligament to bone, but his skin and nerves healed by themselves — something that the tactile-sensing robots he was building at the time could not do. “If these sensor networks get damaged, that’s it,” Shepherd says. In the years since, he and his team have worked to correct this by designing robots that can detect and repair the damage that they sustain. In 2022, Shepherd’s group demonstrated a robot that could recognize damage inflicted by multiple stabbings, stop what it was doing and heal itself1. It would then start off in a different direction in an attempt to avoid further injury.

    For robots that operate in dangerous or remote locations, such as space or the deep sea, the ability to make repairs without human intervention would be invaluable. And if robots become commonplace in human society, self-healing could greatly reduce the quantity of electronic waste that would otherwise be sent to landfill.

    Researchers have developed numerous techniques and materials that could make possible a variety of self-healing electronic components and structural parts. What remains is to integrate these diverse demonstration technologies into sophisticated, damage-resilient machines. “A lot of effort has been focused on different strategies for self-healing,” says Benjamin Tee, an engineer at the National University of Singapore. “The next step is to evolve to systems.” Eventually, this work could perhaps yield machines with not only the resilience to withstand injury, but also the intelligence to see it coming.

    Material advances

    Most research on self-healing uses polymers — large molecules made up of repeating parts. Many synthetic polymers are formed by cross-linking long polymer chains together into networks using strong covalent bonds. A commonly used self-healing technique exploits a process called the Diels–Alder (DA) reaction. If a damaged polymer is heated, the remaining covalent bonds holding the chains together will break. But when the material cools, the DA reaction forms new bonds. The result is polymers that heal when they are heated and then cooled. Clever chemistry has also produced materials that use other triggers instead of heating, including pH, pressure and specific wavelengths of light.

    Healing that requires a trigger is called non-autonomous healing. By contrast, some other materials demonstrate autonomous healing, knitting themselves back together when damaged without the need for any stimulus. Mechanical engineer Bram Vanderborght and his colleagues at Vrije University Brussels have developed DA-based polymers that can autonomously heal at room temperature2. The key to this was altering the cross-link density, which changes molecular mobility, and in turn the tendency for molecules to find and bond with others.

    Person with long dark hair, wearing a white jacket, sitting at table. Cactus in the background.

    Chemical engineer Zhenan Bao and her team have developed electronic skin that can self heal.Credit: FRANCOIS GUILLOT/AFP via Getty

    Another approach to creating polymers that are capable of autonomous self-healing uses hydrogen bonds. These are formed by the attraction of positively charged hydrogen ions to negatively charged atoms in a molecule and are weaker than covalent bonds. “Because the bonds aren’t strong, they’re not permanent, so these polymer networks are continuously forming and dissociating,” says Zhenan Bao, a chemical engineer at Stanford University in California. “When we cut the material the bonds break, but when you put two pieces together, hydrogen bonds form very readily and the material recovers.” Weak bonds also make materials stretchy. Combining multiple kinds of bond, of different strengths, produces materials that are both strong and flexible.

    Researchers have developed a self-healing polymer. Credit: Seppe Terryn

    For robots, materials capable of autonomous healing will usually be preferable. However, there are circumstances in which it could be useful for a robot to wait for the right time to repair itself. “Maybe it’s doing work it cannot stop,” Vanderborght says, or the humidity in the environment is not suitable for healing. “A robotic system is more than the material, it also has intelligence,” Vanderborght says. “With non-autonomous healing, we can choose the optimal moment to heal.”

    Electrical signals

    Polymers are excellent materials to make soft, pliable grippers, but they are typically not much use for electronic components, because most do not conduct electricity. To make a robot with self-healing electronics, researchers first need conductive self-healing materials. One approach involves adding conductive fillers, such as carbon nanotubes, metal particles or nanowires, to self-healing polymers. Bao used these techniques alongside then-graduate-student Tee to develop self-healing electronic skin that contains strain, pressure and other sensors3. The material is capable of tactile sensing, and its softness could make it safer to operate around people than more conventional hard-bodied robots.

    Two people stand next to each other in a laboratory, both looking towards blue coiled cable on laboratory bench

    Mechanical engineer Carmel Majidi (right) and his team came up with a conductive and pliable self-healing gel.Credit: Soft Machines Lab, Carnegie Mellon University

    Another way to make self-healing polymers conductive is by adding liquid metal. Mechanical engineer Carmel Majidi at Carnegie Mellon University in Pittsburgh, Pennsylvania, and his colleagues suspended droplets of a liquid metal alloy made up of gallium and indium in an elastic polymer to create autonomously self-healing soft electronics4.

    Polymer–liquid mixtures called ionic gels, that conduct using ions rather than electrons, have also been proposed for self-healing electronics. Their capacity to conduct electricity, however, is typically limited. “Conductivity is good enough for basic sensing, but you can’t really use it to transmit signals,” Majidi says.

    To address this, Majidi and his colleagues took an ionic gel containing silver flakes and added their liquid metal alloy. The result was a highly conductive and extremely pliable self-healing gel. When the gel is damaged, hydrogen bonds knit it back together and the liquid metal quickly restores conductivity. In 2023, Majidi’s team reported using the material to power the motor of a robot snail5. “The idea is to create robots that have the same properties natural nervous tissue has: an ability to collect and transport signals,” Majidi says.

    A robot snail that uses electrically conductive self-healing gel. Credit: Soft Machine Lab, Carnegie Mellon University

    Researchers have also developed self-healing polymers with more complex electronic properties — dielectrics and semiconductors, for example. These are useful for making components such as capacitors and transistors that can repair themselves. Tee and his colleagues have developed a transparent self-healing dielectric, which they used to construct low-power light-emitting capacitors. In 2019, the team demonstrated the technology in a soft robotic gripper that can detect objects in the dark by reflecting light off them6. The material can also heal in water owing to the hydrophobic ion–dipole bonds that hold it together, and it can work at a variety of temperatures and pHs7. “This is the second generation of self-healing autonomous materials,” Tee says.

    As electronic components increase in complexity, they tend to use multiple layers. This presents a problem for healing: when such components are repaired, the layers can require painstaking manual realignment that is often not possible for very thin devices. Last June, Bao and her colleagues proposed a solution to this that involves stacking alternating layers of two polymers8. The polymers do not mix, ensuring that the layers remain distinct, but they can adhere into a single material by forming hydrogen bonds where they meet. When this multilayer material is cut and then heated, the affinity the different polymers have for themselves — and their aversion to each other — causes the layers to realign. The researchers have demonstrated the approach in a self-healing pressure sensor, and in a robot in which the large components were first roughly magnetically assembled, and then microscopically aligned by heating.

    A fibre heals after it is cut, placed in a magnetic field and then heated. Credit: Christopher Cooper, Sam Root, Shuai Wu of Bao Group and Zhao Group of Stanford University.

    Sensing pain

    To respond to injury, an intelligent machine must first notice when it happens. In humans, pain provides the alert. For robots, sensors made from conductive polymers can use changes in conductance to detect damage. Vanderborght’s group used a DA polymer that contained conductive carbon particles to create piezoresistive strain sensors, which detect force by sensing a change in electrical resistance, and capacitive touch sensors9. The team then embedded these sensors in a soft polymer robot gripper, enabling it to detect deformation and force. These sensors also inherently detect severe damage because cuts and tears cause sudden changes in resistance or capacitance.

    This information could then be used to initiate healing. Vanderborght’s group has developed a self-healing resistive heater that can be integrated into a soft robot10. When the robot detects a change in resistance or capacitance that is consistent with an injury, it could then switch on this heater to begin the healing process.

    A tomato is gripped by four soft yellow finger-like sensors

    A strain sensor embedded into a robot gripper can detect injury.Credit: Ref 9

    Conductive sensors have some drawbacks: they are both electrically noisy and complicated to make, says Shepherd. For this reason, he and his team are exploring the possibility of using light to detect damage. The team has shaped a self-healing polyurethane-based material that transmits light into optical fibres1. Stretching or bending the fibres alters the amount of light transmitted, allowing a processor to detect deformation and damage.

    The material incorporates two kinds of bond: covalent disulfide bonds and weaker hydrogen bonds. “It uses hydrogen bonding, so it immediately heals,” says Shepherd. “But it also uses disulfide exchange over a longer period, to make it strong.” The researchers incorporated the optical fibres into a soft quadruped robot that stops walking while it heals. “Then, after a long enough period, it starts moving again,” Shepherd says.

    Whichever technology is used to detect an injury, the same metrics could also be used after healing to evaluate the extent of recovery. Shepherd’s group is using neural networks to analyse the outputs of optical-sensor networks, to recognize different states of deformation and damage. In the future, Shepherd plans to use this to enable a self-healing robot to compensate for any deficits that remain after repair. “You can update the controller to say, ‘even though it’s repaired, we’ll now sense differently in this region’, then operate based on that change,” he says. Shepherd compares this to his own injury. It is “what happened to my knee — the nerves healed on their own, and they feel very different than before, but I can still use that sensation to interpret the world”.

    Blood and bone

    A crucial component of any robot is its power source — if that fails, everything does. Self-healing batteries have been developed, and there are devices that harvest energy from movement, light or temperature, but their output tends to be low. Shepherd and his colleagues are pursuing a radically different solution.

    Based on flow batteries, which store power in electrolytes, the approach uses an electrolyte for the fluid in hydraulic robots. The team was inspired by natural vascular systems that carry oxygen and nutrients throughout the body, remove waste and fight infections. In a soft aquatic robot, the synthetic vascular system operated the robot’s fins and powered its pumps and electronics11. And in a different set-up, vibrating ions in the electrolyte meant the system could even be used to transmit information12. “These liquid wires are a self-healing system we’re imbibing into robots, which we call robot blood,” Shepherd says. “Liquids are the ultimate self-healing material, if you can contain them.”

    A white fish-like robot in a tank of water

    A synthetic vascular system works the fins of a lionfish-inspired robot.Credit: James Pikul

    James Pikul, a mechanical engineer at the University of Pennsylvania, Philadelphia, who worked with Shepherd on these electrolytic vascular systems, is now focusing on ways of using liquid systems to heal metal components13. “We were very inspired by the way bone is repaired,” says Pikul. “Your body pumps blood to the fracture, which delivers nutrients, energy and the building blocks you need to restore the bone.”

    Metals are stronger than the polymers most researchers in this field have focused on, which could be an advantage for robots intended for heavy-duty industrial applications. “There’s a trade-off for self-healing materials: if they heal fast, they’re usually soft and not mechanically strong,” says Bao. Metals are, of course, eminently repairable by heating above their melting temperature, but the energy needed to do this is prohibitive in a robot. The extreme temperatures would also not be ideal for a machine containing delicate components.

    Instead, Pikul’s metal-healing technique exploits oxidation–reduction (redox) reactions. Taking electrons from metal atoms (oxidation) turns them into positive ions, which can be moved using electric fields. Giving electrons back (reduction) returns the ions to neutral metal atoms, which are deposited in the new location. This is a well-established process and is the basis of electroplating. “By doing this, we can move metal from one place to another,” Pikul says. “All we have to do is precisely put electrons where we want the metal to grow.”

    Compared with other metal-healing techniques, the redox process requires much less energy. “We’ve shown we’re six orders of magnitude more efficient,” Pikul says. “Because electrolytes are liquid and mobile at room temperature, you can do this at room temperature, or colder.” The researchers have shown that the technique can return metals to full strength, or greater, in a matter of hours.

    Put it together

    Despite more and more of the technologies required to construct self-healing robots being developed, they sit mostly in isolation. For sophisticated self-healing robots to emerge, researchers now need to characterize and benchmark these materials, Vanderborght says, so that commercial interests can compare them and match them to specific applications. “It’s a matter of having a portfolio of products: autonomous, non-autonomous, stiff, non-stiff, conductive, magnetic,” Vanderborght says. “We can shop from the different materials and combine them in one big application.”

    One of the factors most likely to drive the adoption of these materials is sustainability. Last year, for example, the European Parliament backed draft legislation that would obligate manufacturers to produce goods that are durable — and repairable. Robots with the ability to heal will operate for longer than will ones that can’t, and should therefore contribute less to electronic waste. “Self-repair has a lot of implications for reducing that,” Tee says. “That’s what drives me.” Vanderborght’s group is also aiming to make components that can be mechanically or chemically recycled when they do eventually reach the end of their life.

    If the aim is to extend a robot’s useful life, however, then the ability to heal will ultimately be only part of the solution — ideally, a robot would be able to prevent serious injury in the first place. “In the extreme case, you can anticipate damage and avoid it completely,” says Tee. Some hints of this can already be seen in the soft quadruped robot that Shepherd’s team developed. The robot’s fibre-optic sensors measure at sufficiently high sampling rates that a response to any contact could be quickly issued. “Reflexes are going to be really important,” Shepherd says. “It’s not self-healing, but it is damage intelligence.”

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  • Japanese Moon-lander unexpectedly survives the lunar night

    Japanese Moon-lander unexpectedly survives the lunar night

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    Images of the Lunar surface taken and transmitted by LEV-2(SORA-Q).

    The lander was photographed upside down on the lunar surface. Credit: JAXA/TOMY Company/Sony Group Corporation/Doshisha

    Defying expectations, Japan’s spacecraft, which touched down with unprecedented precision near the Moon’s equator last month, has survived the harsh lunar night and started communicating with Earth again. On Sunday, a command was sent to the Smart Lander for Investigating Moon, or SLIM, and a response was received, according to the Japanese Space Agency (JAXA).

    SLIM was not designed to survive the deep cold night on the lunar surface, where temperatures drop below minus 130 degrees Celsius. JAXA’s engineers had remained hopeful that it would make it through the night, says SLIM project manager Shinichiro Sakai, but its message home was “a nice surprise”. “We knew that some of NASA’s Surveyors survived, so we felt we should also have some chance,” he says.

    He believes the lander’s communications system, onboard computer and solar panels are working. JAXA announced later on social media that it was attempting to take new images with a multiband spectroscopic camera used to study the composition of rocks.

    It’s been a rollercoaster ride for SLIM. Despite a successful on-target landing, JAXA lost contact with SLIM for some days when it rolled upside down. With its solar panels oriented the wrong way, it had only a trickle of energy with which to snap a photo and send it home before lunar night fell. The next lunar sunset for SLIM will take place on Thursday.

    During the lunar day, extreme heat also becomes a problem for SLIM. With the Sun high, its radio electronics overheat very quickly and Sakai says the team will need to wait for the temperature to cool later in the week before they restart scientific investigation.

    Electronic circuit boards can fail when they get too warm or cold, because they are built with different materials and the materials have different contraction rates, says Simeon Barber, a planetary scientist from Open University in Milton Keynes, UK. “It can generate significant twisting and stretching forces, and cause components or joints to crack or be pulled apart,” he says.

    Both SLIM and the US spacecraft Odysseus, which made history last week by becoming the first privately built Moon-lander to complete a soft touchdown, experienced issues with landing positions. “Landing on the Moon is as difficult as it has always been,” says Barber.

    The two recent spacecraft were built within many constraints, in particular cost, which places limits on their size and technology. “The two landers got almost everything right, but went awry at the last moments,” he says.

    However the teams have obtained lots of data that will inform future attempts. “The best way to land successfully is to keep trying and to learn from previous attempts,” says Barber.



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  • Catching the rays: my part in Morocco’s renewable-energy revolution

    Catching the rays: my part in Morocco’s renewable-energy revolution

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    Nature, Published online: 26 February 2024; doi:10.1038/d41586-024-00548-0

    Soukaina El Idrissi Faouzi works to optimize the performance of the world’s biggest working solar farm.

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  • Earthquakes are most deadly in these unexpected countries

    Earthquakes are most deadly in these unexpected countries

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    Nations such as Japan and Indonesia make headlines because of their frequent earthquakes. But these countries are not the ones that have been most affected by quake-related deaths, according to a study1 that included the analysis of centuries-old earthquake fatality records.

    Ecuador, Lebanon, Haiti and Turkmenistan top the list of countries with the highest “earthquake fatality load”, the study’s metric for the impact of a nation’s quake-related deaths relative to its population size. This metric will be “useful to highlight countries where additional hazard and risk studies should be carried out”, says Vitor Silva, a risk engineer at the Global Earthquake Model Foundation in Pavia, Italy, who was not involved in the work.

    Unequal burden

    Earthquakes have claimed high numbers of lives in populous nations such as China, but the study’s authors sought to understand which countries incur the largest relative burden of such deaths. To do so, the researchers drew on their previously compiled catalogue2 of deadly earthquakes and fatality reports, which is “one of the most complete I have ever seen”, Silva says. That database includes records of quake-related deaths dating back more than 500 years.

    The researchers analysed data from 35 nations and regions that have accrued at least 10,000 earthquake-associated deaths since 1500. The authors aggregated annual quake-related deaths and population sizes in each country for the years that had sufficiently accurate records. From this data set, they derived each country’s earthquake fatality load, the average number of quake-related deaths per year per million residents (see ‘Small countries, big losses’).

    Small countries, big losses: Bar chart showing the earthquake fatality load for a seven of regions.

    Source: Ref. 1.

    The fatality load’s simplicity could make it a useful metric for assessing the risk and communicating it to decision makers, Silva says.

    A country’s fatality load depends not only on the frequency and strength of its quakes, but also on factors such as its population size, the earthquake resistance of its infrastructure and its ability to respond to disasters. These factors might explain the relatively low fatality load of countries that lie along major fault lines, such as Nepal (ranked 27th), Japan (ranked 28th) and Indonesia (ranked 31st).

    The aftermath of recent earthquakes supports the authors’ findings. When a quake of magnitude 7.5 hit Japan in January, 241 people died. The 2023 earthquake that hit Turkey (ranked 11th) and Syria (ranked 19th) was roughly three times stronger than the one in Japan, with a magnitude of 7.8, yet had a death toll roughly 200 times higher. This was mainly because the quake affected large numbers of communities with inadequate infrastructure and because of a slow rescue response.

    Surprising findings

    Ecuador’s ranking at the top initially surprised the study’s lead author Max Wyss, a retired seismologist at the International Centre for Earth Simulation in Geneva, Switzerland. But Wyss notes that Ecuador has had several deadly earthquakes over the years, and their frequency combined with the nation’s small population mean that such fatalities “are a big hit for the country”.

    On a more encouraging note, the researchers found a steady decrease in the fatality load over time across all analysed countries. They attribute this change to improvements in construction and a steady migration from rural to urban areas with stronger buildings and better disaster responses.

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  • Building robots to get kids hooked on STEM subjects

    Building robots to get kids hooked on STEM subjects

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    Sponsor message: 00:00

    This Working Scientist podcast series is sponsored by the University of Queensland, where research is addressing some of the world’s most challenging and complex problems.

    Take your research further at UQ. Visit uq.edu.au

    Juliana Gil: 00:25

    Hello, this is How to Save Humanity 17 Goals, a podcast brought to you by Nature Careers in partnership with Nature Food. I am Juliana Gil, chief editor at Nature Food.

    Welcome again to the series where we meet the scientists working towards the Sustainable Development Goals, agreed by the United Nations and world leaders in 2015.

    Since then, in a huge global effort, thousands of researchers have been tackling the biggest problems that the planet faces today.

    In episode four, we look at Sustainable Development Goal number four: how to ensure quality education for all.

    And we meet an engineer from Uganda who is changing the way children learn science right across the African continent.

    Solomon King Benge: 01:15

    My name is Solomon King Benge. And I’m the founder and executive director of Fundi Bots. So Fundi Bots is an organization based in Uganda that is working to improve and accelerate science learning in Africa. We focus very, very heavily on science subjects.

    And the goal for our work basically is to move the quality of education from theory-driven blackboard-centred learning to highly practical student-centred learning, in which the pedagogy revolves around understanding the practice as opposed to academic excellence, which typically leads to rote memorization and all that.

    So we use multiple tools. The one that we’re most known for is the robotics tool, where we teach children in primary school and secondary school, and some university students, how to work with robots.

    And the goal is that the journey of building a robot is a journey of discovery that is exciting. Once a child sees a demo robot, they’re so excited to get it working. So they sort of, like, give us permission to teach them. So I like to call it permission-driven education.

    The other tool that we have is a little more aligned to the curriculum. So it has a more academic bent in that it is designed to integrate directly in the national curriculum.

    And the reason for this is when we were analyzing the results of our work, the big question that came to us was, “How do we create more impactful learning where the problem centre is?” And the problem centre is typically within the classroom? And that is, what resources do teachers have to teach science well? And what resources do students have to understand the content?

    So we build something that we call the enhanced science curriculum. And the goal for that is to integrate directly into the national curriculum almost word for word, but provide high quality tools that both students and teachers use in the classroom to transform the classroom from a blackboard-centred activity to students working in groups, sharing their findings and making exciting discoveries about science.

    Solomon King Benge: 03:31

    Sustainable development goal number four is ensuring quality education. And the goal is to ensure inclusive and equitable quality education and promote lifelong learning opportunities for all.

    So the advantage that we have is that a lot of the Sustainable Development Goals are general quality of life ambitions that any country or the world should have.

    The categorization is helpful, but it is something that we are inherently working on. So the goal has quite a few targets. And almost all are very aligned to the work that we do. So ensuring that girls and boys have equal and free education, ensuring access to quality, technical and vocational education, early childhood development etc. technical skills, vocational skills, all of those are very, very highly aligned to what we are doing. So we are working towards it. But mostly because of the necessity that we have.

    Our long term goal is to work with more than one million students across Africa. Currently, we are primarily based in Uganda. We have done trainings in Tanzania, we have done trainings in Kenya, and we’ve done some trainings in in Rwanda as well.

    But our goal is essentially to replicate all this effort across the African continent. So the story of Fundi Bots, the journey of Fundi Bots, is, I like to tell people that I am essentially reaching back in time to try and redeem myself.

    I was the kind of kid that you find in a neighborhood tinkering, tinkering with, like, electronics parts, like trying to understand what made this thing stick. Like, a radio is dead. But why is it dead? I grew up in the 90s. And it was rife with a lot more accessible electronics. So a lot of electronics these days, it’s like, very embedded, it’s very hard to get parts from it. But back in the day, you’d open up a radio, and you find electric motors, you find wires, you find all these things that for a curious child was just like heaven.

    And so I was that child, I was essentially trying to understand how things work, putting things together, making toys that were very unlike the kind of toys that my fellow kids were aware were making. Because mine were driven by electricity.

    And the the frustration that I felt was even more in the academic setting, because in school it was just about memorizing information so that you could pass an exam. And I found that pretty frustrating, because even at that age, I still felt like there had to be something a little bit more to education than just sitting in a classroom and memorizing facts.

    When I got to secondary school, I discovered that it was just another higher profile academic setting where everything that you did, even when it was practical, was aligned towards getting the facts you need, so that you can pass an exam.

    The moment of inflection for me, that both solidified my desire for an alternate form of learning, but also increased my frustration, was discovering a very amazing book called The Engineer in Wonderland by ER Laithwaite.

    And he used to give Christmas lectures at the, I think the Royal Academy of Sciences or the Royal Society. And he wrote a book called Engineer in Wonderland. And I loved to read. So the story of Alice in Wonderland immediately resonated for me.

    And it was this very complex book on electricity and magnetism. But he told it in such an approachable way that even a child like me could understand.

    And it was just so much fun, and so exciting. And so I got the book, went to my physics teacher and said, “Hey, can we, can we do this? This looks like something that kids would actually enjoy learning?” He took one look at it, and essentially say, “Don’t waste your time with this, this is not important, because it’s not in the curriculum.”

    So at that point, subconsciously, and resolutely, as you know, as far as a 14, 13 year old can be resolute, I realized that, you know, this education as it was just wasn’t the thing for me.

    But in 2011 is when the Fundi Bot story sort of came back full circle. Because when I got that rejection from the teacher, the first thought that came to mind was, “There has to be something better than this.”

    And that’s something for me was a place of learning where kids would not be judged on what was exciting for them. They would not be pressured into, you know, academic environments, but it was a place where knowledge was free, the kids were mentored, etc.

    So that sort of stayed with me, lingered at the back of my mind. You know, I basically told myself that this dream that I had, as a child, I think I can start working on it now.

    I started Fundbots as a hobby. And then in 2014, it became a full time organization. So what started as a solo, you know, project, suddenly began attracting people. We began working with more and more students, we began attracting a lot of funding.

    And right now we are at a stage where we are a team of 125. And last year alone, we trained more than 22,000 students.

    Our interventions are in three major areas. One is learning from home, which we call the Fundi At Home program.

    The other is learning to prepare for work, which is a more skills development-oriented perspective, which we call Fundi At Work.

    And then the big one is school-based, which we call Fundi At School. So each of those provides learning options and learning perspectives for students in different ways.

    And so the one million that we want to reach, the majority of them are in schools, the ones that we will reach directly are in schools. But we are also building digital content that children can access through the internet.

    So YouTube is a current primary platform, but this year we plan to roll out an online learning system where any kid across Africa can log on (with the help of their parents, of course), any kid across Africa can log on and begin learning the material that we are teaching.

    We also want to do broadcast, which essentially means putting our content on TV and syndicating it across the African continent.

    So when you look at those very highly scaleable options, they may not be as practical as we would like, but it still allows us to reach a significantly diverse and significantly broad audience.

    And the hope is that in every single one of those interventions we will create ways in which kids can learn experientially by trying experiments on their own, but also academically by having a high quality learning perspective in the classroom.

    Solomon King Benge 10:54

    So our learning models are essentially centered around what kind of access we have to the children. The robotics program tends to happen more on the weekends.

    Some schools might give us some classroom time, but typically, they happen on weekends. It’s like an after school program bordering on a club basis. So we do have teachers that go to the schools every single day, and work with the students and other, and other teachers.

    So we have a lot of teachers on staff. The vast majority of our staff members are teachers that support other teachers in schools. So they will go to schools. They might have a suitcase full of electronics, or they might be on a DIY project.

    And so students are asked to pick up cardboard, some wires, some materials from their neighbourhood. And the goal essentially, is to lead them on a journey where they make these things themselves.

    The big challenge with robotics education initiatives is that many of them are from the west and they are very top down. They don’t take into consideration the local perspectives and the local context.

    So you’ll find a child is being taught robotics using a $300, $400 robot. And their first instinct is, “This is exciting. But I cannot do this because I don’t have this kind of money to go and buy something.”

    The Fundi Bots model is completely different. We teach kids how to make all sorts of gadgets out of cardboard, wood, plastic wires. When you look at the robots that our kids made, you can tell that that was built by a child and that they know exactly how it works, you know?

    And so for us, that is exciting, because we open up a lot more creativity, innovation and ingenuity.

    Solomon King Benge 12:39

    The vast majority of robots that our students build are what we call rovers, which is essentially a four-wheeled vehicle.

    So that’s a machine that has tyres, a couple of wheels. It is controlled by some sort of very rudimentary circuit.

    So depending on the age of the child, that rover can get more and more complex, or it can get very, very simple. Sometimes all you need to do to get a kid excited is for them to actually connect a motor and a battery and see their thing move.

    And so it stretches the gamut, all the way from something as simple as that to something like a robot that is trying to navigate its way around an environment.

    On the other hand, we also have students that build projects like greenhouses that are controlled by smarthome software. We have students build mock traffic lights for the roads in the villages.

    One of my most exciting ones was when we taught this kid in northern Uganda how to build a sensor-driven robot. And we asked him “So what do you think you can do with this?”

    And his first reaction was “I think I can now create something that lets the goats out of the pen in the morning so that I don’t have to wake up early, right?”

    And while it was hilarious for us, it was just a very real testament of once you empower children and make learning meaningful, then they actually begin looking at the practical applications of that learning.

    It’s no longer about an exam. It’s about actual real world solutions. In fact, one of the things that we actively encourage is our students to be able to consider a problem in their communities that they can provide a solution for.

    One of the ones that gives us tremendous joy is a group of students from Northern Uganda that made a solar-powered cooker that ended up in the news headlines. And they actually won a sustainability award at the recent climate change conference in Dubai.

    So none of this would have been possible if we had a rigid structure that was very guided. We like kids to explore. We like them to experiment. And so our robotics program is not 100% robotics in the traditional sense but robotics is a gateway for kids to begin exploring the capabilities of electronics or of computing. So they can go on to explore programming or to explore electrical engineering or mechanical engineering.They don’t have to do robotics.

    In order for sustainability goal number four to be achieved, I think the biggest player in all of this is government. We need to have very, very strong intentionality from the highest levels.

    You can have as many actors like Fundi Bots, as many individuals, as many organizations trying to change this landscape, but what we are essentially doing is the government’s work. We do not have the capacity, interest or finances to employ hundreds or thousands of teachers.

    This is supposed to be government work. we do not have the resources and the infrastructure to provide learning materials for an entire continent.

    But the reason we do this is because at the highest level, there is no capacity, no intentionality, or no interest in funding some of these things. And even if there is interest, even if there is intentionality, there is always a breakdown because there’s so many factors from a policy perspective.

    From the moment a decision is made to the moment of implementation could be years. And in that time, millions of kids have passed through the school system and their lives have been changed. Literally, every single day that passes there’s a kid that’s dropping out of school who could have benefited from a high quality education.

    So these decisions take time. I understand that the time is necessary, but they are extremely costly from a human capital perspective, because these are the kids that we need for tomorrow’s workforce.

    So the biggest intentionality has to start from the top. I would say that it pretty much narrows down to the most critical actors are teachers.

    We need to put teachers as high priority workforce, you know? Looking at quality of training, quality of compensation, quality of tools and resources that they’re given.

    We need to empower teachers to love the work that they’re doing. And we need to, quite honestly, pick the best teachers because many teachers get into the profession because it’s a last resort. So I think that for me, teachers are the biggest catalyst.

    And if we train them right, if we filter them right, and if we give them the right resources, then that goal is basically achievable on its own. But there has to be maximum intentionality at the government level.

    Solomon King Benge 17:37

    I absolutely love my job. The part that I love the most about my work, I no longer do. And that was the tinkering, the training, interacting with the kids. Like I really, really love teaching. Unfortunately, my work now is more about fundraising.

    So I spend more time in Excel and Word compared to, like, a lab, and programming, or soldering stuff. But I do love the impact that we’re having on the lives of children. I love it when teachers tell us the impact that our work is having on not just the students but on them as well.

    So it’s really exciting. It’s very exhausting. It’s very draining sometimes because my work is to fundraise. So looking for the money can be an exhaustive, an exhausting and disappointing process.

    But it’s all is about like “We just need to keep grinding because the kids need this.” Like I said, every day that passes there’s a child that’s that’s going out of a system and we have failed that child.

    Juliana Gil: 18:40

    Thanks for listening to this series how to save humanity seven singles. Join us again next week when we look at Sustainable Development Goal number five: how to achieve gender equality and empower all women and girls.

    See you then.

    Sponsor message: 19:16

    This Working Scientist podcast series is sponsored by the University of Queensland, where researchers addressing some of the world’s most challenging and complex problems. Take your research further at UQ. Visit uq.edu.au

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  • Nature wants to publish your research

    Nature wants to publish your research

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    Wind power turbines under Velebit mountain view, Alkaline pool from abandoned factory, Dalmatia region of Croatia.

    This year’s Queen Elizabeth Prize recognized a 40-year partnership between two researchers that has led to an increase in the size of modern wind turbines and the scale of their use.Credit: Alamy

    Last month, materials scientist Matic Jovičević-Klug and his colleagues reported how ‘red mud’, an iron oxide waste product generated during aluminium manufacturing, can be repurposed for ‘green’ steelmaking. Their findings1 have the potential to reduce carbon dioxide emissions from steelmaking by using a circular-economy approach.

    Had an article reported the implementation of this same process on a larger, even industrial scale, many readers might have been surprised to see it in Nature.

    Well, we want to change this perception.

    We want the world of engineering to know that its research, whether as a proof of concept or at the implementation stage, will be considered by Nature’s editors and reviewers, as it is already by colleagues at other Nature Portfolio journals. The most recent of these, Nature Chemical Engineering and Nature Reviews Electrical Engineering, were launched in January.

    We are proud to have already included some notable examples in Nature’s pages. On 31 January, for example, Zhixun Wang at Nanyang Technological University in Singapore and his colleagues described a method to produce flexible semiconductor fibres without defects or cracks that could be used in wearable devices2. One advantage of this technology, write Xiaoting Jia and Alex Parrott in an accompanying News and Views article3, is its industrial readiness, because the semiconductor fibres can be woven into fabrics using existing methods.

    So why emphasize our willingness to consider more such studies now? Last summer, Nature published a series of editorials on the Sustainable Development Goals (SDGs), the world’s plan to end poverty and achieve environmental sustainability. The plan isn’t going well — most of the goals and associated targets will not be met by the United Nations’ self-imposed 2030 deadline.

    The series brought home the realization that SDG-related research is not yet a priority for many researchers, especially for those in high-income countries, compared with their colleagues in low- and middle-income countries. Partly in response, more than 40 Nature Portfolio journals put out a collective call for papers on topics relevant to the SDGs as part of a drive to get researchers thinking about how their work might move the world closer to meeting the goals.

    In this context, studies that show how discoveries and inventions can be applied in real-world settings, including by testing and evaluating products and processes on large scales, are often highly relevant to the Nature Portfolio journals. Nature’s publishing criteria require that papers report original research that is of outstanding scientific importance. The journal also expects that a study reaches “a conclusion of interest to an interdisciplinary readership”. Our message is loud and clear — that readership includes engineers, as well as scientists from all disciplines.

    Back to the future

    By putting out this call for more engineering research, we are restoring a connection with engineers and the field of engineering that is rooted deep in Nature’s history. In Nature’s first issue, published on 4 November 1869, readers will find a discussion on the likelihood of silting in the Suez Canal4, one of the largest engineering projects of the nineteenth century. The canal was a hot news topic, because it was due to open two weeks later, on 17 November. There was much public debate, and a degree of anxiety about such geoengineering feats. A correspondent to Nature, Thomas Login, had worked on the 437-kilometre Ganges Canal, which had opened 15 years earlier to connect the Ganges and Yamuna rivers in India. The Ganges Canal’s waterways were intended to irrigate massive stretches of farmland, thereby reducing the risk of famine in a region where people had previously experienced hunger when the rains failed. I have no doubt there are many who will say the Suez Canal “is a total failure”, Login wrote. He was confident that the canal would succeed.

    This is not an isolated or rare example. Subsequent editions of Nature include engineering conversations and critiques. The journal also published regular reports of meetings of professional engineering societies — just as those of other scientific societies were discussed.

    The late nineteenth century was an age of ambitious, and controversial, imperial-era projects. It was also a time when scientists and engineers wanted to read about each other’s work in the same journal. As editors and publishers, we accept our share of responsibility for how things have turned out. Our responsibility now is to renew this connection.

    Creating by collaborating

    We want to recognize engineering in other ways, too. By highlighting the profession’s approach to collaboration, for example. Last week, the Queen Elizabeth Prize for Engineering, equivalent in recognition to the Nobel prizes, was awarded to two engineering researchers for their contributions to the field of modern wind-turbine technology. Unlike recipients of some of the more well-known science prizes, Andrew Garrad and Henrik Stiesdal were not rewarded for a single landmark achievement, but for their 40-year partnership in designing, testing and improving wind turbines that are now built on an industrial scale around the world. The prize recognizes decades of painstaking, sometimes incremental, and, yes, collaborative achievements.

    Their work also brought together researchers from other fields, such as mathematics, fluid physics, electronics and materials science. Such an approach to problem-solving needs to become the norm if the world is to succeed in addressing global challenges, Stiesdal, a former chief technology officer at Siemens Wind Power, told Nature. We wholeheartedly agree.

    Engineering and science are like two ships that have set sail close together, but in many ways have gradually drifted apart. We can’t let that continue. Having engineers back in Nature’s pages is long overdue, not least for the health of our planet and the well-being of all people.

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