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Search results for “Mechanics”

1,000+ results for "Mechanics"

COVID-19: Distancing and masks are not enough

A new fluid dynamics model shows that tiny droplets can spread over long distances and remain airborne for a long time, making masks and distancing measures less effective. The model predicts that even with proper ventilation, it's possible to come into contact with the virus in certain environments.

SourceVienna University of Technology·JournalInternational Journal of Multiphase Flow·DateOct 20, 2020

Optimizing of VCSEL photon lifetime for minimum energy consumption at varying bit rates

Researchers have optimized Vertical Cavity Surface Emitting Lasers (VCSELs) to achieve lower energy consumption while maintaining high data transmission rates. The study demonstrates that doubling the number of devices can reduce total energy consumption by 50% without compromising device lifetime or reducing current density.

A question of reality

Bell's inequalities contrast local realism with quantum mechanics, relevant to security, cryptography, and computing applications.

SourceSpringer·JournalThe European Physical Journal H·DateSep 24, 2020

Beating noise via superposition of order

Researchers at UQ and Griffith University use quantum superposition of order to successfully transmit information through two noisy channels. The technique, which can nullify the effect of one noisy medium on another, has potential applications in satellite communication and secret sharing.

SourceUniversity of Queensland·JournalPhysical Review Research·DateAug 25, 2020

Penn State to lead $30 million university research alliance

The Penn State-led university research alliance aims to develop high-resolution radiation detectors capable of identifying dirty bombs or concealed radiation materials. The team plans to design low-cost, high-efficiency room-temperature detectors that would eliminate the need for extreme temperatures to control detecting materials.

Electrons obey social distancing in 'strange' metals

Electrons in Planckian metals exhibit high-temperature superconductivity due to their desire for social distancing. By adjusting the ratio between kinetic energy and interaction energy, researchers created a model that captures the system's behavior down to absolute zero.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateJul 23, 2020

Regulating the properties of MAPbBr3 single crystal via voltage and application

Researchers developed a technique to modify defect populations in perovskite crystals without chemical additives, enabling the material to act as a memristor device with multiple resistance states. The voltage regulation engineering helps improve optical and electrical properties by passivating deep-level donor-like defects.

Fluid mechanics mystery solved

Oregon State University professor Brian D. Wood has solved a 70-year-old puzzle in fluid mechanics, clarifying how chemicals mix in fluids and paving the way for advances in medical, industrial, and environmental applications. His research builds on Octave Levenspiel's work and resolves paradoxes in other theories.

SourceOregon State University·JournalJournal of Fluid Mechanics·DateJun 10, 2020

Energy generated on offshore wind turbine farms, and conveyed ashore as hydrogen fuel

A new study by the University of the Basque Country confirms that offshore wind turbines can produce hydrogen fuel with significant increases in energy generation. The research found that adding vortex generators and Gurney flaps to wind turbines improved aerodynamics, resulting in 2.5% higher annual energy production.

SourceUniversity of the Basque Country·JournalInternational Journal of Hydrogen Energy·DateApr 30, 2020

Scientists 'film' a quantum measurement

Researchers created a 'film' of a single atom's measurement process, showing that the state changes gradually over time. This study provides new insights into the inner workings of nature and sheds light on the predictions of modern quantum physics.

SourceStockholm University·JournalPhysical Review Letters·DateFeb 26, 2020

A spookily good sensor

Scientists at Japan Science and Technology Agency developed a method to couple a magnetic sphere with a sensor using quantum entanglement, enabling single-shot detection of magnetic excitations. The device's sensitivity is comparable to that of theoretical dark-matter particles, opening new avenues for research.

Deconstructing Schrödinger's cat

Laloë's theory combines adding a random term to the Schrödinger equation with another concept from de Broglie and Bohm, relating quantum collapse to the universal gravitational field. This approach can be applied to both macroscopic objects like cats and atoms.

SourceSpringer·JournalThe European Physical Journal D·DateFeb 14, 2020