New brain target key to easing tough-to-treat epilepsy
Some people with tough-to-treat epilepsy might benefit if doctors target a brain region newly linked to the disorder, a new study suggests.
Apr 17, 2024
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Some people with tough-to-treat epilepsy might benefit if doctors target a brain region newly linked to the disorder, a new study suggests.
Apr 17, 2024
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The brain consumes approximately 25% of the body's oxygen to fuel its neural activities, underscoring the importance of sufficient oxygen supply for maintaining normal cognitive operations. Consequently, monitoring cerebral ...
Apr 2, 2024
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Cancer is the scourge of the 21st century, and despite the rapid development in medical diagnostics and personalized treatments, most therapies remain insufficient to save a patient's life. Timely and accurate diagnosis is ...
Mar 20, 2024
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By harnessing light, my colleagues and I designed a wireless, ultrathin pacemaker that operates like a solar panel. This design not only eliminates the need for batteries but also minimizes disruptions to the heart's natural ...
Mar 17, 2024
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Hunger can drive a motivational state that leads an animal to a successful pursuit of a goal—foraging for and finding food.
Mar 15, 2024
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Brain function depends on the swift movement of electrical signals along axons, the long extensions of nerve cells that connect billions of brain cells. The nerve fibers are insulated by a fatty layer called myelin, which ...
Jan 31, 2024
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Cardiovascular diseases rank among the top causes of death across the world, and cardiac interventions are similarly very common. For example, cardiac catheter ablation procedures, which are used to treat arrythmias, number ...
Nov 13, 2023
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With an aging global population comes a need for new sensor technologies that can help clinicians and caregivers remotely monitor a person's health. New smart pants based on fiber optic sensors could help by offering a nonintrusive ...
Jun 27, 2023
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Researchers at Tohoku University have shown that astrocytes—star-shaped glial cells that control the local ionic and metabotropic environment of the brain—exhibit an acid response with REM sleep in mice. They theorize ...
Mar 3, 2023
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When we daydream or revisit memories, a large group of regions within our brain "lights up," or becomes more active. It's referred to as the Default Mode Network (DMN) because it is more active when the brain is not focused ...
Feb 15, 2023
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An optical fiber (or fibre) is a glass or plastic fiber that carries light along its length. Fiber optics is the overlap of applied science and engineering concerned with the design and application of optical fibers. Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communications. Fibers are used instead of metal wires because signals travel along them with less loss, and they are also immune to electromagnetic interference. Fibers are also used for illumination, and are wrapped in bundles so they can be used to carry images, thus allowing viewing in tight spaces. Specially designed fibers are used for a variety of other applications, including sensors and fiber lasers.
Light is kept in the core of the optical fiber by total internal reflection. This causes the fiber to act as a waveguide. Fibers which support many propagation paths or transverse modes are called multi-mode fibers (MMF), while those which can only support a single mode are called single-mode fibers (SMF). Multi-mode fibers generally have a larger core diameter, and are used for short-distance communication links and for applications where high power must be transmitted. Single-mode fibers are used for most communication links longer than 550 metres (1,800 ft).
Joining lengths of optical fiber is more complex than joining electrical wire or cable. The ends of the fibers must be carefully cleaved, and then spliced together either mechanically or by fusing them together with an electric arc. Special connectors are used to make removable connections.
This text uses material from Wikipedia, licensed under CC BY-SA