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A team of researchers at the Korea Institute of Machinery and Materials (KIMM) has developed an innovative ‘morphing’ wheel that adapts to various terrains, offering potential solutions for mobility challenges. This technology allows the wheel to overcome obstacles up to 1.3 times the height of its radius, enabling smooth navigation across kerbs, humps, and even staircases.

The wheel, designed with flexibility inspired by the surface tension of water droplets, transitions between solid and fluid states when encountering obstructions. Applications for the technology range from wheelchairs navigating uneven terrain to unmanned delivery vehicles capable of climbing stairs, making it a groundbreaking tool for accessibility and automation. The team also foresees its integration into robotics, particularly for machines requiring stable movement in industrial settings.

Technology Overview and Testing

The morphing wheel’s design includes a chain-like outer hoop and spoke wires connected to a hub. A sensor system adjusts the stiffness of the spokes, enabling the wheel to adapt in real time based on terrain conditions. Current testing has demonstrated its ability to tackle 18-cm stairs while carrying a life-size dummy in a wheelchair prototype. Devices equipped with these wheels have also achieved speeds of up to 30 km/h.

Dr Song Sung-hyuk, principal researcher at KIMM, stated that efforts are underway to enhance the wheel’s capabilities for speeds of up to 100 km/h, comparable to average cars. He highlighted that while similar technologies like non-pneumatic tyres offer flexibility, they lack the obstacle-negotiating ability of the morphing wheel.

Potential Impact and Applications

The research team envisions broad applications for the morphing wheel. Two- and four-legged robots, often hampered by limited efficiency and vibration sensitivity, could benefit from this advancement. Industrial robots transporting payloads across uneven surfaces might also see significant improvements in stability and performance.

The morphing wheel gained recognition when featured as the cover article of Science Robotics in August 2024. Its potential to reshape mobility technologies underscores ongoing efforts in innovation at KIMM. style>.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

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Rare 2,000-Year-Old Gladiator Knife Handle Found Near Hadrian’s Wall

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Rare 2,000-Year-Old Gladiator Knife Handle Found Near Hadrian's Wall

Archaeologists have uncovered a remarkable 2,000-year-old Roman knife handle in Northumberland, England. The discovery, made in the River Tyne near Corbridge Roman Town, features a detailed depiction of a gladiator. This unique find sheds light on the influence and popularity of gladiators across the Roman Empire, including its farthest reaches in Britain.

As per a report by English Heritage, the handle, crafted from copper alloy, portrays a secutor gladiator, identifiable by his heavy armour and helmet. Secutors, named after the Latin term for “chaser,” were known for engaging in close combat against their agile counterparts, the retiarii. Notably, the figurine represents a left-handed fighter, a rarity in Roman culture, where left-handedness was often considered inauspicious. Researchers from English Heritage have suggested that this specific detail may indicate the handle was modelled after an actual gladiator, rather than serving as a general representation.

Gladiator Culture in the Roman Empire

Gladiatorial games were a significant feature of Roman public entertainment, drawing large crowds to amphitheatres across the empire. While these fighters were typically enslaved individuals or criminals, some gained celebrity status, despite their marginalised social standing. The events, often hosted by elite Roman citizens or emperors, aimed to display power and wealth.

Frances McIntosh, Collections Curator for Hadrian’s Wall and the North East at English Heritage, stated that gladiators’ popularity extended far beyond Rome, a fact underscored by the discovery of this artefact. Although memorabilia such as pottery and figurines have been documented, similar finds in Britain are considered rare.

Plans for Public Display

Corbridge Roman Town, originally established as a supply base in 79 AD, served as a key site during the Roman occupation of Britain until around 400 AD. English Heritage plans to exhibit the knife handle, along with other artefacts recovered from the river, at the Corbridge site next year.

This discovery continues to emphasise the enduring fascination with gladiators, both in ancient times and modern culture.

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Hubble shows cosmic collision of two galaxies in the Coma Cluster.

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Hubble shows cosmic collision of two galaxies in the Coma Cluster.

A captivating image of two interacting galaxies, known as MCG+05-31-045, has been shared by NASA and the European Space Agency (ESA) through the Hubble Space Telescope. It is located 390 million light-years away in the Coma Cluster. The smaller galaxy’s spiral arms appear to merge with the larger one, with a tail of material and a halo connecting the two, suggesting an ongoing collision that could eventually transform their structure entirely.

The Coma Cluster: A Rich Galactic Collection

The Coma Cluster, home to this galactic interaction, is a dense collection of over a thousand known galaxies. While most are elliptical in shape, these forms are typically created by gravitational interactions such as collisions. During these events, the structure of spiral galaxies is disrupted, and their gas is compressed, sparking bursts of new star formation. Once the massive blue stars exhaust their energy and die out, the galaxies are left with cooler, redder stars and little gas to sustain further star formation. Over time, such interactions result in the formation of elliptical galaxies.

The Future of MCG+05-31-045

Scientists believe that the same transformation is underway for MCG+05-31-045. As the smaller galaxy merges into its larger neighbour, gravitational forces will trigger intense star formation. This phase will not last indefinitely. Once the hot, massive stars die out, the resulting structure is likely to resemble the elliptical galaxies prevalent in the Coma Cluster. Despite the dramatic changes, this process will unfold over millions of years.

This image, captured by Hubble and processed by R. J. Foley from UC Santa Cruz, showcases the intricate dynamics of galactic evolution, offering a glimpse into the future of galaxies shaped by their cosmic interactions

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NASA Rockets Create Artificial Clouds Under Northern Lights in Norway

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NASA Rockets Create Artificial Clouds Under Northern Lights in Norway

A rare sight unfolded on November 10, as NASA launched rockets that created artificial clouds beneath auroras during a minor geomagnetic storm over northern Norway. The event took place near Andøya Space Center, a facility situated in an ideal location for studying geomagnetic activity due to its proximity to the Arctic Circle. Tour operator Ivar Sandland, who witnessed the spectacle, told Space.com about the unusual visual phenomena during his trip from Bodo to Tromso.

As per the report by the publication, Sandland, who runs Nordland Adventures, assumed it was a cloud at first glance. He later discovered through local news that the visible trails in the sky were part of NASA’s ongoing experiments.

VortEx Mission Studies Atmospheric Energy Flow

The event was part of NASA’s Vorticity Experiment (VortEx), which investigates energy dynamics in the turbopause, where the mesosphere and thermosphere meet at approximately 90 kilometres above Earth. The report further mentions that the rockets released trimethyl aluminium, a compound that reacts in the atmosphere to produce visible streaks. These artificial clouds are used to track gravity waves, aiding researchers in understanding their interactions at this altitude.

Sounding rockets, smaller suborbital vehicles designed for research purposes, were deployed for the experiment. The visual effects created by the chemical release offered scientists crucial data on energy transfer processes, while also captivating onlookers with an unusual display under the northern lights.

Ideal Location for Space Research

Andøya Space Center serves as a hub for launching rockets intended for atmospheric and geomagnetic research. Charged particles from the sun, guided by Earth’s magnetic field towards the poles, produce auroras by interacting with gases in the upper atmosphere. This makes northern Norway an optimal site for observing these interactions.

Such experiments offer insights into atmospheric science while fostering curiosity among local residents and visitors, highlighting the intersection of research and natural wonder.

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