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Qué (quién) es ice core - definición
Ice core
CORE SAMPLE OF ICE, TYPICALLY REMOVED FROM A GLACIER OR ICE SHEET
Ice cores; Ice core samples; Ice core sample; Ice Cores; Layers of ice; Ice layers; Ice core dating; Ice Core
An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier. Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years.
List of ice cores
WIKIMEDIA LIST ARTICLE
Spitzbergen ice core
This is a list of ice cores drilled for scientific purposes. Note that many of these locations are on moving ice sheets, and the latitude and longitude given is as of the date of drilling.
main store
![A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit](https://commons.wikimedia.org/wiki/Special:FilePath/Ferrite core memory.jpg?width=200 "A 10.8×10.8 cm plane of magnetic core memory with 64 x 64 bits (4 Kb), as used in a [[CDC 6600]]. Inset shows ''word line'' architecture with two wires per bit")
![[[Project Whirlwind]] core memory](https://commons.wikimedia.org/wiki/Special:FilePath/Project Whirlwind - core memory, circa 1951 - detail 1.JPG?width=200 "[[Project Whirlwind]] core memory")
![Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high ("1") or low ("0") depending on original magnetization state of the core.](https://commons.wikimedia.org/wiki/Special:FilePath/Ringkernspeicher hysteresekurven.agr.svg?width=200 "Diagram of the [[hysteresis]] curve for a magnetic memory core during a read operation. Sense line current pulse is high (\"1\") or low (\"0\") depending on original magnetization state of the core.")
![This [[microSDHC]] card holds 8 billion bytes (8 GB). It rests on a section of magnetic-core memory that uses 64 cores to hold eight bytes. The microSDHC card holds over one billion times more bytes in much less physical space.](https://commons.wikimedia.org/wiki/Special:FilePath/8 bytes vs. 8Gbytes.jpg?width=200 "This [[microSDHC]] card holds 8 billion bytes (8 GB). It rests on a section of magnetic-core memory that uses 64 cores to hold eight bytes. The microSDHC card holds over one billion times more bytes in much less physical space.")
![US quarter]] for scale](https://commons.wikimedia.org/wiki/Special:FilePath/Magnetic-core memory, 18x24 bits.jpg?width=200 "US quarter]] for scale")
PREDOMINANT FORM OF RANDOM-ACCESS COMPUTER MEMORY FOR 20 YEARS BETWEEN ABOUT 1955 AND 1975
Ferrite core memory; Ferrite-core memory; Core store; Magnetic-Core Storage; Ferrite ram; Magnetic core storage; Core Memory; Main store; Magnetic core memory; Core memory; Core memories
Ejemplos de uso de ice core
1. The ice core lets researchers look back at least 740,000 years in time and study Earth.
2. Between 1''0 and 1''8 an 11,775–foot–long ice core was drilled there.
3. This ice–core analysis has provided many of the most eloquent and extensive data sets on climate change.
4. "He unlocked the SECRET of the Greenland ice core," reads the front of Alley‘s card, his name highlighted in light blue block lettering.
5. Air samples from the world‘s oldest ice core confirm that human activity has dramatically increased levels of the greenhouse gas carbon dioxide in the earth‘s atmosphere.