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Hace 3 días · MOS memory, based on MOS transistors, was developed in the late 1960s, and was the basis for all early commercial semiconductor memory. The first commercial DRAM IC chip, the 1K Intel 1103, was introduced in October 1970. Synchronous dynamic random-access memory (SDRAM) later debuted with the Samsung KM48SL2000 chip in 1992.
Hace 3 días · Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that is used to relieve pain, fever, and inflammation. [8] This includes painful menstrual periods, migraines, and rheumatoid arthritis. [8] It may also be used to close a patent ductus arteriosus in a premature baby. [9] [8] It can be used orally (by mouth) or intravenously. [8]
Hace 3 días · Asia–Africa boundary. The boundary between Asia and Africa is the Suez Canal, the Gulf of Suez, the Red Sea, and the Bab-el-Mandeb. This makes Egypt a transcontinental country, with the Sinai peninsula in Asia and the remainder of the country in Africa.. Asia–Europe boundary Definitions used for the boundary between Asia and Europe in different periods of history.
Hace 3 días · Visna-maedi virus. The human immunodeficiency viruses ( HIV) are two species of Lentivirus (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), [1] [2] a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. [3]
Hace 3 días · Science is a rigorous, systematic endeavor that builds and organizes knowledge in the form of testable explanations and predictions about the world. Modern science is typically divided into three major branches: the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study individuals ...
Hace 2 días · Bitcoin (abbreviation: BTC; sign: ₿) is the first decentralized cryptocurrency. Nodes in the peer-to-peer bitcoin network verify transactions through cryptography and record them in a public distributed ledger, called a blockchain, without central oversight. Consensus between nodes is achieved using a computationally intensive process based on proof of work, called mining, that guarantees ...
Hace 3 días · Disability. Disability is the experience of any condition that makes it more difficult for a person to do certain activities or have equitable access within a given society. [1] Disabilities may be cognitive, developmental, intellectual, mental, physical, sensory, or a combination of multiple factors. Disabilities can be present from birth or ...
