Personalizing radiotherapy for early-stage non-small cell lung cancer provides excellent tumour control with low toxicity.
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Innovation in proton therapy was front-and-centre at the ASTRO Annual Meeting, along with advances in MR-guided radiotherapy, combined immunotherapy–radiotherapy and FLASH treatment schemes.
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Three-qubit computing platform is made from electron spins.
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Physicist and science historian Michael Riordan ponders whether a different approach would have saved the Superconducting Super Collider from cancellation.
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A distinctive iridescent patina on an ancient Roman glass fragment stems from a photonic crystal structure that formed naturally within the material over time.
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Ultrasound waves in air have been used to manipulate powerful laser beams – in a first claimed by researchers.
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Researchers develop a magnetoelectric implant that enables wireless stimulation of nerve cells in response to magnetic pulses.
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A centrifuge is a device that uses centrifugal force to subject a specimen to a specified constant force, for example to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or liquids from solids. It works by causing denser substances and particles to move outward in the radial direction. At the same time, objects that are less dense are displaced and moved to the centre. In a laboratory centrifuge that uses sample tubes, the radial acceleration causes denser particles to settle to the bottom of the tube, while low-density substances rise to the top. A centrifuge can be a very effective filter that separates contaminants from the main body of fluid.
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Researchers discover that the Kortokoff sounds heard through a stethoscope may not be sound waves at all.
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Two studies find evidence for the production of tellurium in neutron star mergers, strengthening the case that such cosmic collisions are responsible for most of the heavy elements in the universe.
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A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure. The word is derived from the Latin valva, the moving part of a door, in turn from volvere, to turn, roll.
The simplest, and very ancient, valve is simply a freely hinged flap which swings down to obstruct fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems.
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The simplest, and very ancient, valve is simply a freely hinged flap which swings down to obstruct fluid (gas or liquid) flow in one direction, but is pushed up by the flow itself when the flow is moving in the opposite direction. This is called a check valve, as it prevents or "checks" the flow in one direction. Modern control valves may regulate pressure or flow downstream and operate on sophisticated automation systems.
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