Popular Friction News and Current Events | Page 2

Popular Friction News and Current Events, Friction News Articles.
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Study shows how rough microparticles can cause big problems
Research finds the surface texture of microparticles in a liquid suspension can cause internal friction that significantly alters the suspension's viscosity -- effectively making the liquid thicker or thinner. The finding can help address problems for companies in fields from biopharmaceuticals to chemical manufacturing. (2017-10-12)

Geologists study China earthquake for glimpse into future
The May 12 earthquake that rocked Sichuan Province in China was the first there in recorded history and unexpected in its magnitude. Now a team of geoscientists is looking at the potential for future earthquakes due to earthquake-induced changes in stress. (2008-07-06)

'Lubricating' sediments were critical in making the continents move
Plate tectonics is a key geological process on Earth, shaping its surface, making it unique among the Solar System's planets. Yet, how plate tectonics emerged and which factors controlled its evolution remains controversial. Now, researchers from the German Research Centre for Geosciences GFZ, the University of Potsdam and the University of Maryland, in a study published in Nature, propose that natural lubrication by debris from surface erosion was crucial in starting and maintaining plate tectonics. (2019-06-05)

RIT engineer researches the impact of shear stress on cell circulation
Jiandi Wan, an assistant professor of microsystems engineering in Rochester Institute of Technology's Kate Gleason College of Engineering, recently received a $476,505 award from the Gordon and Betty Moore Foundation for his work using fluid dynamics and mechano-biology strategies to better understand blood flow and how cells moving through blood vessels are affected by shear stress (2017-01-18)

World's fastest man-made spinning object could help study quantum mechanics
Researchers have created the fastest man-made spinning object in the world, which they believe will help them study material science, quantum mechanics and the properties of vacuum. (2018-07-20)

How earthquake swarms arise
A new fault simulator maps out how interactions between pressure, friction and fluids rising through a fault zone can lead to slow-motion quakes and seismic swarms. (2020-09-24)

Fabric the reinforcer
Scientists from NUST MISIS have tested experimental composite materials for aircraft brakes. New materials, reinforced by carbon 'fabric', have turned out to be far more durable than the current analogues. As a result of testing, the scientists developed recommendations to improve the fracture toughness of both existing and developed composite materials for braking systems, which in the long term can improve the reliability and safety of aircraft operation and reduce maintenance costs. (2019-02-19)

Understanding the wetting of micro-textured surfaces can help give them new functionalities
The wetting and adhesion characteristics of solid surfaces critically depend on their fine structures. However, until now, our understanding of exactly how the sliding behaviour of liquid droplets depends on surface microstructures has been limited. Now, physicists Shasha Qiao, Qunyang Li and Xi-Qiao Feng from Tsinghua University in Beijing, China have conducted experimental and theoretical studies on the friction of liquid droplets on micro-structured surfaces. (2018-02-22)

Magnetic eyelashes: A new source of MRI artifacts
American Journal of Roentgenology researchers used a phantom to show that magnetic eyelashes worn during MRI can cause substantial artifact and that detachment of the eyelashes from the phantom can occur. (2019-07-24)

Designing better nursing care with robots
Robots are becoming an increasingly important part of human care, according to researchers based in Japan. To help improve the safety and efficacy of robotic care, the scientists have developed a control method that could help robots better replicate human movement when lifting and moving a patient. They published their results in IEEE/CAA Journal of Automatica Sinica. (2020-01-15)

Microscale superlubricity could pave way for future improved electromechanical devices
A new joint Tel Aviv University/Tsinghua University study finds that robust superlubricity can be achieved using graphite and hexagonal boron nitride, which exhibit ultra-low friction and wear. This is an important milestone for future technological applications in the space, automotive, electronics and medical industries. (2018-08-01)

Great chocolate is a complex mix of science, physicists reveal
The science of what makes good chocolate has been revealed by researchers studying a 140-year-old mixing technique. (2019-05-08)

Why friction depends on the number of layers
Based on simulations, friction properties of the two-dimensional carbon graphene were studied by scientists of Karlsruhe Institute of Technology (KIT) and the Fraunhofer Institute for Mechanics of Materials IWM with scientists in China and the USA. In contact with monolayer graphene, friction is higher than with multi-layered graphene or graphite; friction force increases for continued sliding. The scientists attribute this to the real contact area and the evolving quality of frictional contact. (2016-12-05)

Elephant trunks form joints to pick up small objects; research could translate to robotics
Understanding how elephants use their trunks to pick up small objects could lead to robots designed with flexible hands or grippers, according to a new study that includes Rochester Institute of Technology research. (2018-10-24)

In the pipeline: A solution to a 130-year old problem
A twist on a textbook physics experiment sheds light on a complex phenomenon in fluid dynamics. (2018-01-31)

Rolling stones, turbulence connect evolution to physics
A law of physics explaining why larger animals live longer and travel further also extends to the simplest forms of mass migration on the planet -- like rolling stones and turbulent eddies in water and air currents, according to Duke research. The finding demonstrates that evolution doesn't apply only to biological things, but any physical system in motion. (2016-02-17)

World's Most Studied Glacier Surges Again
The world's most studied glacier surged recently at least four years ahead of when scientists were expecting it to. Geophysical Institute Professor Will Harrison has studied the Variegated Glacier for nearly 25 years. His research has contributed to thescientists' understanding of surging glaciers (1996-10-10)

Why is ice so slippery
The answer lies in a film of water that is generated by friction, one that is far thinner than expected and much more viscous than usual water through its resemblance to the 'snow cones' of crushed ice we drink during the summer. This phenomenon was recently demonstrated by researchers from the CNRS and ENS-PSL, with support from the École polytechnique, in a study that appeared in Physical Review X on Nov. 4, 2019 (2019-11-05)

Synthetic two-sided gecko's foot could enable underwater robotics
Geckos are well known for effortlessly scrambling up walls and upside down across ceilings. Even in slippery rain forests, the lizards maintain their grip. Now scientists have created a double-sided adhesive that copies this reversible ability to stick and unstick to surfaces even in wet conditions. They say their development, reported in ACS' Journal of Physical Chemistry C, could be useful in underwater robotics, sensors and other bionic devices. (2017-04-26)

Robot control system for grasping and releasing objects under both dry and wet conditions
A control system for deformable robot-fingertips was developed for grasping and releasing objects. Previously developed robot fingertips with high friction texture can stably grasp a paper box, a soft object under both dry and wet conditions. By injecting a lubricant (absolute ethanol) the grasped object slipped downwards without changing the position of the robot fingertips. The current controlling system using lubricant could be applied to robot tasks in a narrow space. (2019-07-16)

New composite materials prolong the service life of spare parts for equipment and vehicles
Studies have shown that hybrid powder materials based on natural layered silicates developed by the chemists of the Far Eastern Federal University (FEFU) and the Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) decrease the friction ratio in metals sevenfold. (2018-10-09)

Nanodiamonds are forever
Argonne researchers have created a self-generating, very-low-friction dry lubricant that lasts so long it could almost be confused with forever. (2018-05-10)

Scrambled supersolids
Supersolids are fluid and solid at the same time. Physicists from Innsbruck and Geneva have for the first time investigated what happens when such a state is brought out of balance. They discovered a soft form of a solid of high interest for science. As the researchers led by Francesca Ferlaino and Thierry Giamarchi report in Nature Physics, they were also able to reverse the process and restore supersolidity. (2021-01-04)

Machine-learning earthquake prediction in lab shows promise
By listening to the acoustic signal emitted by a laboratory-created earthquake, a computer science approach using machine learning can predict the time remaining before the fault fails. (2017-08-30)

Why plants are so sensitive to gravity: The lowdown
Plants can detect the slightest angle of inclination. Yet the mechanism by which they sense gravity relies on microscopic grains. In theory, such a system should hardly allow for precise detection of inclination. Researchers from the CNRS, the French National Institute of Agronomic Research (INRA), and Université Clermont Auvergne have now explained this curious paradox : the grains are constantly being agitated within the plant cells! (2018-05-02)

NASA satellite sees Tropical Storm Fami form, fast and furious
NASA's Aqua satellite caught the thirteenth tropical cyclone in the southern Indian Ocean form very quickly. In 12 hours a low grew into a tropical storm named Fami and made a fast landfall in Madagascar around 1 a.m. ET today, Feb. 2. (2010-02-02)

Scientists create laser-activated superconductor
Shining lasers at superconductors can make them work at higher temperatures, suggests new findings from an international team of scientists. (2016-02-08)

Houston's urban sprawl increased rainfall, flooding during Hurricane Harvey
Princeton and University of Iowa researchers found that Houston's urban landscape directly contributed to the torrential rainfall and deadly flooding of Hurricane Harvey in 2017. They report in the journal Nature that Houston's risk for extreme flooding was 21 times greater due to urbanization. The results highlight the human role in extreme weather events and the need to consider urban and suburban development when calculating hurricane risk. (2018-11-14)

Tracking firefighters in burning buildings
McMaster researchers, working with partners at other universities, have created a motion-powered, fireproof sensor that can track the movements of firefighters, steelworkers, miners and others who work in high-risk environments where they cannot always be seen. (2019-03-01)

Identifying the origin of macroscopic friction between clay mineral surfaces
NIMS, the University of Tokyo and Hiroshima University jointly discovered for the first time, through theoretical calculation and experiment that macroscopic frictions occurring between clay mineral surfaces originate from interatomic electrostatic forces between these surfaces. This finding may facilitate the design of solid lubricant materials and understanding of earthquake-causing fault slip mechanisms. (2019-01-24)

How fluid viscosity affects earthquake intensity
A young researcher at EPFL has demonstrated that the viscosity of fluids present in faults has a direct effect on the intensity of earthquakes. (2019-03-20)

Stanford autonomous car learns to handle unknown conditions
In order to make autonomous cars navigate more safely in difficult conditions -- like icy roads -- researchers are developing new control systems that learn from real-world driving experiences while leveraging insights from physics. (2019-03-27)

Ankle exoskeleton fits under clothes for potential broad adoption
The device does not require additional components such as batteries or actuators carried on the back or waist. (2019-03-22)

Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
Earthquakes are some of the most daunting natural disasters that scientists try to analyze. Though the earth's major fault lines are well known, there is little scientists can do to predict when an earthquake will occur or how strong it will be. And, though earthquakes involve millions of tons of rock, a team of University of Pennsylvania and Brown University researchers has helped discover an aspect of friction on the nanoscale that may lead to a better understanding of the disasters. (2011-11-30)

Two, six, many
Phase transitions describe dramatic changes in properties of a macroscopic system - like the transition from a liquid to a gas. Starting from individual ultracold atoms, Heidelberg University physicists under the direction of Prof. Dr Selim Jochim were able to observe the emergence of such a transition with an increasing number of particles. (2020-12-11)

Static electricity as strong as lightening can be saved in a battery
Prof. Dong Sung Kim and his joint research team presented a new technology that can increase the amount of power generated by a triboelectric nanogenerator. The research team developed a high-efficiency integrated circuit to obtain reliable and practical electrical energy from the triboelectric nanogenerator. (2020-02-06)

Frog feet could solve a sticky problem
Tree frogs have specially adapted self-cleaning feet which could have implications for new designs of medical bandages, tires, and even long lasting adhesives. Researchers have now discovered how tree frogs prevent their feet from picking up dirt while maintaining stickiness. This work will be presented at the Society for Experimental Biology Annual Conference in Glasgow on July 3, 2011. (2011-07-02)

How do high-frequency oscillations of tropical cyclones vary across the W North Pacific?
A new study reveals the variations of high-frequency oscillation over different sea areas, and helps to improve the prediction of tropical cyclone intensity in different sea areas over the western North Pacific. (2018-02-25)

New model for gauging ice sheet movement may improve sea-level-rise predictions
University of Kansas researchers discovered friction -- or 'basal drag' -- between ice sheets and the hard bed underneath has no influence on how fast glaciers flow. (2018-06-19)

A new model of ice friction helps scientists understand how glaciers flow
Despite the looming ecological consequences, glacier motion remains poorly understood. The bedrock, the ice-bed interface and the water-filled cavities all affect friction and influence how the ice will flow, but studying these poses challenges -- remote radar sensing can track glacial movement, but it can't measure detailed properties of the ice and rock. In the Journal of Chemical Physics, Bo Persson describes a new model of ice friction that offers crucial insight into glacier flows. (2018-12-18)

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