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Physicists simulate engine oil behavior under extreme pressure

Figure 1. In a high-duty engine or turbine, lubrication reduces wearing by preventing a direct contact between the metal parts in a sliding contact bearing (depicted) or a gear train. Engineers need to know how the extreme pressures of up to 10,000 atmospheres affect a fluid’s viscosity, because once it reaches a certain critical value, […]

Antineutrino detection could help remotely monitor nuclear reactors

The principle of reactor operation verification with antineutrino monitors. The process for verifying reactor inventory integrity with antineutrinos bears similarities to biometric scans such as retinal identity verification. Credit: Georgia Tech Technology to measure the flow of subatomic particles known as antineutrinos from nuclear reactors could allow continuous remote monitoring designed to detect fueling changes […]

New approach could make HVAC heat exchangers five times more efficient

Credit: Brown University Researchers from Tsinghua University and Brown University have discovered a simple way to give a major boost to turbulent heat exchange, a method of heat transport widely used in heating, ventilation and air conditioning (HVAC) systems. In a paper published in Nature Communications, the researchers show that adding a readily available organic […]

Optimizing structures within complex arrangements of bubbles

Credit: CC0 Public Domain While structures which emulate foam-like arrangements of bubbles are lightweight and cheap to build, they are also remarkably stable. The bubbles which cover the iconic Beijing Aquatics Centre, for example, each have the same volume, but are arranged in a way which minimises the total area of the structure—optimising the building’s […]

Considering the container to strengthen the weak force’s signal

Kurtis Bartlett won the 2018 JSA Thesis Prize for making measurements that helped determine the weak charge of the proton. Credit: DOE’s Jefferson Lab Nuclear physicists successfully measured the weak charge of the proton by shooting electrons at a cold liquid hydrogen target in an experiment carried out at the Department of Energy’s Thomas Jefferson […]

New method for exoplanet stability analysis

A stability map of Saturn obtained by chaos indicator MEGNO (a) and recurrence network measures average path length (b) and transitivity (c). The latter two panels are based on transit timing variation of Jupiter and the radial velocity of the sun, respectively. Credit: Tamás Kovács Exoplanets revolving around distant stars are coming quickly into focus […]

Researchers identify prime compound candidates for new room temperature semiconductor radiation detectors

Emerging semiconductor sensors that can improve equipment used for detecting and identifying radioactive materials. Credit: Pacific Northwest National Laboratory Nuclear power plants can withstand most inclement weather and do not emit harmful greenhouse gases. However, trafficking of the nuclear materials to furnish them with fuel remains a serious issue as security technology continues to be […]

Researchers model unihemispheric sleep in humans

Credit: Gordon Johnson from Pixabay Some animals, such as birds, dolphins, and whales, can engage in unihemispheric sleep, in which one hemisphere of the brain sleeps while the other hemisphere remains awake. Staying half-awake allows animals to literally “keep an eye open” for predators, and for migrating birds, allows for uninterrupted flight for days or […]