Broward County commissioners voted unanimously not to renew the Sheriff’s Office fire-rescue agreement after 2028, returning roughly 900 employees and oversight of the department to the county
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Broward County commissioners voted unanimously not to renew the Sheriff’s Office fire-rescue agreement after 2028, returning roughly 900 employees and oversight of the department to the county
Switching to modern silicon solar cells could cut the cost of powering satellites by as much as 90% based on beginning-of-life (BOL) performance, according to a review led by the University of Surrey. The switch to silicon cells could also halve the weight of the solar cells needed on a spacecraft, freeing mass for fuel or instruments or cutting launch costs.
A research team led by faculty at the Duke Quantum Center (DQC) has observed string-breaking dynamics related to particle-antiparticle formation on a quantum simulator, among the first such observations in quantum physics.
Unlike electric charge, as far as we know all mass is positive, and positive masses attract one another. Could negative mass exist, and if so, what would be the ramifications?
Britain announced Wednesday that it will launch a new military space squadron to defend the country’s satellites, the latest move as countries race to develop military space capabilities.
A pigeon turning its head might seem an unlikely electricity generator. Yet one proposed explanation for the bird’s magnetic sense depends on exactly that: Turning through Earth’s magnetic field would produce tiny electrical signals inside its ears. However, a theoretical study suggests that this miniature generator cannot supply directional information fast enough to work as a compass. The problem is electrical noise produced within the proposed sensor itself.
Creating a perfect crystal sounds straightforward: Arrange identical building blocks into a repeating, orderly structure. At the microscopic scale, though, even subtle biases in how particles interact can push them in preferred directions, making it harder to form uniform crystalline materials.
A team led by University at Buffalo physicists has found a mathematical solution that shows how a frustrated quantum magnet can transition from ultraslow behavior to ultrafast, highly entangled behavior resembling that of a black hole.
A new study led by researchers from Ben-Gurion University of the Negev (BGU) reveals that living matter violates previously known physical principles of symmetry when cellular flows form and break down collective patterns. The research, published in Nature Physics, challenges conventional liquid-crystal physics by showing that moving single-celled bacteria and human respiratory cells spontaneously break mirror symmetry, moving in curved, irreversible spiral paths.
Scientists using the STAR detector to study particle collisions at the Relativistic Heavy Ion Collider (RHIC) have found an intriguing dip in their data in a relatively unexplored region of the nuclear phase diagram—a map of how nuclear matter behaves under various conditions of temperature and density. The dip appears in data tracking collision-by-collision variations in the momenta of particles emerging from collisions between gold nuclei at RHIC, near RHIC’s lowest collision energies. These collisions create the highest-density nuclear matter and may indicate that something interesting is happening in that dense region of the phase diagram. The findings are described in a paper just published in Physical Review Letters.
Just as a leaf drifts along with a stream, objects in other moving fluids normally drift along with the flow. That is, unless they exert energy to move against it. Although it may be less intuitive, light waves or photons work similarly. To move against a stream of light, an object or particle, like a photon, must either have an external force acting on it or actively use energy to move upstream.
Science fiction suggests that life on other planets, if it exists, is likely far more advanced than life on Earth. A recent study suggests otherwise.
The Van Allen radiation belts are huge, doughnut-shaped regions of highly energetic charged particles trapped by Earth’s magnetosphere. These charged particles play a major role in space weather, so studying them is important for predicting and managing risks to satellites, astronauts, power grids and other infrastructure.
The more astronomers learn about the universe’s earliest galaxies, the stranger they seem. Many of their surprising properties may be explained by differences between their massive stars and those in galaxies like our own Milky Way. A new University of Utah-led survey with the Hubble Space Telescope is shedding light on the stellar astrophysics operating in early galaxies.
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