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Becoming a full-fledged organism out of a handful of cells, complete with functioning tissues and organs, is a messy yet highly synchronized process that requires cells to organize themselves in a precise manner and begin ...
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The headset combines a smartphone in a virtual reality headset with a brain sensor and plays podcasts.
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A team of researchers from Nanyang Technological University, Singapore (NTU Singapore) has uncovered new clues about how chemicals released by brain cells regulate our attention span.
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Connections among one set of activated neurons in rat brains grew stronger while memories were being formed, but those in another weakened, UT Southwestern Medical Center researchers have discovered. The findings, at odds ...
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Researchers from the University of Tokyo reveal how the presynaptic Ube3a E3 ligase, a causal factor in Angelman syndrome, eliminates neural chatter. The study helps find a better drug target for the Angelman syndrome treatment.
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Flexible thin-film electrodes placed directly on brain tissue show promise for the diagnosis and treatment of epilepsy, as demonstrated recently by scientists at Tokyo Tech. Thanks to an innovative yet straightforward design, ...
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The sequencing of the human genome promised a revolution in medicine, but scientists soon realized that a genetic blueprint alone does not show the body in action. That required understanding the proteome—all the proteins, ...
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New animal research suggests that little-studied brain cells known as astrocytes are major players in controlling sleep need and may someday help humans go without sleep for longer without negative consequences such as mental ...
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In the fields of communications, signal processing, and in electrical engineering more generally, a signal is any time-varying or spatial-varying quantity.
In the physical world, any quantity measurable through time or over space can be taken as a signal. Within a complex society, any set of human information or machine data can also be taken as a signal. Such information or machine data (for example, the dots on a screen, the ink making up text on a paper page, or the words now flowing into the reader's mind) must all be part of systems existing in the physical world – either living or non-living.
Despite the complexity of such systems, their outputs and inputs can often be represented as simple quantities measurable through time or across space. In the latter half of the 20th century, electrical engineering itself separated into several disciplines, specializing in the design and analysis of physical signals and systems, on the one hand, and in the functional behavior and conceptual structure of the complex human and machine systems, on the other. These engineering disciplines have led the way in the design, study, and implementation of systems that take advantage of signals as simple measurable quantities in order to facilitate the transmission, storage, and manipulation of information.
This text uses material from Wikipedia, licensed under CC BY-SA
