Physics

Einstein letters on God, Israel and physics fetch $210,000

Letters written by Albert Einstein about God, Israel and physics fetched nearly $210,000 at a Jerusalem auction Tuesday, with the highest bid going to a missive about God's creation of the world.

Illuminating a better way to calculate excitation energy

Researchers have demonstrated a new method to calculate excitation energies. They used a new approach based on density functional methods, which use an atom-by-atom approach to calculate electronic interactions. By analyzing a benchmark set of small molecules and oligomers, their functional produced more accurate estimates of excitation energy compared to other commonly used density functionals, while requiring less computing power.

New metrology technique measures electric fields

It is crucial that mobile phones and other wireless devices -- so prevalent today -- have accurate and traceable measurements for electric fields and radiated power. Until recently, however, it wasn't possible to build self-calibrating probes that could generate independent and absolute measurements of these. To address this, researchers have developed a method to measure electric fields and a probe to carry out such measurements.

Scientists develop innovative, atomic resonance-based method to measure electric fields

In the last decades, mobile phones and other wireless devices have become central features of life around the globe. These devices radiate varied amounts of electromagnetic energy and thus project electric fields into the surrounding space. It is crucial to the design and deployment of these devices that they have accurate and traceable measurements for electric fields and radiated power. Until recently, however, it was not possible to build self-calibrating probes that could generate independent and absolute measurements of these electric field values.

Cow herd behavior is fodder for complex systems analysis

The image of grazing cows in a field has long conjured up a romantic nostalgia about a relaxed pace of rural life. With closer inspection, however, researchers have recognized that what appears to be a randomly dispersed herd peacefully eating grass is in fact a complex system of individuals in a group facing differing tensions. A team of mathematicians and a biologist has now built a mathematical model that incorporates a cost function to behavior in such a herd to understand the dynamics of such systems.

Illuminating a better way to calculate excitation energy

Glow sticks, like those brandished by trick-or-treaters and partygoers, light up due to excited electrons of the molecules in the contained fluorescent dye. Electrons accept the exciting energy from a chemical reaction that results when an inner tube in the glow stick is cracked and two fluids come into contact. After exciting to a higher energy level, they relax back to a lower energy by releasing light that can guide young candy hunters in costumes.

NASA Debuts Automated System to Streamline Technology Patent Licensing

NASA has developed a new system to streamline the way the agency licenses its technology patents, making the transfer of NASA-patented innovations to industry easier than ever before.

Using photoluminescent nanorods as ultimate probes of fluid flow

A new method has been created for very precise determination of fluid flow in capillary networks in realtime, report scientists in a new report.

Electron caught in the act

Australia's fastest camera has revealed the time it takes for molecules to break apart. The experimental research aims to help in the design of new molecules for materials science or drug discovery.

Tiny bubbles provide tremendous propulsion in new microparticles research

A new technique could have significant implications in the development of micromotors and optical devices for use in solar cell optics, report researchers.

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