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Modern, automated POTS is characterized by several aspects: [3] Bi-directional (full duplex) communications. Using balanced signaling of voltage analogs of sound pressure waves on a two-wire copper loop; Restricted to a narrow frequency range of 300–3,300 Hz, called the voiceband, which is much less than the human hearing range of 20–20,000 Hz
Postural orthostatic tachycardia syndrome (POTS) is a condition characterized by an abnormally large increase in heart rate upon sitting up or standing. [1] POTS is a disorder of the autonomic nervous system that can lead to a variety of symptoms, [10] including lightheadedness, brain fog, blurred vision, weakness, fatigue, headaches, heart palpitations, exercise intolerance, nausea ...
Sherds have been found in China and Japan from a period between 12,000 and perhaps as long as 18,000 years ago. [5] [74] As of 2012, the earliest pottery vessels found anywhere in the world, [75] dating to 20,000 to 19,000 years before the present, was found at Xianren Cave in the Jiangxi province of China. [76] [77]
.pot, file extension for Microsoft PowerPoint template files; Pot, a ceramic insulator supporting an electric conductor rail to provide electric traction power to trains; Potentiometer, a variable resistor, informally known as a "pot" or "trim pot" POT, acronym for 'plain old telephone', a traditional phone as in plain old telephone service
Potash (/ ˈ p ɒ t æ ʃ / POT-ash) includes various mined and manufactured salts that contain potassium in water-soluble form. [1] The name derives from pot ash, plant ashes or wood ash soaked in water in a pot, the primary means of manufacturing potash before the Industrial Era. The word potassium is derived from potash. [2]
A cup, 65 mm high, made at Aswan, Egypt, in the 1st–2nd century AD, and decorated with barbotine patterns. Some of the shapes of Arretine plain wares were quite closely copied in the later 1st century BC and early 1st century AD in a class of pottery made in north-east Gaul and known as Gallo-Belgic ware. [15]
1911 – Superconductivity discovered by Heike Kamerlingh Onnes; 1912 – Stainless steel invented by Harry Brearley; 1916 – Method for growing single crystals of metals invented by Jan Czochralski; 1919 – The merchant ship Fullagar has the first all welded hull.
Wheel-made pottery dates back to roughly 2500 BC. Before this, the coil method of building the walls of the pot was employed. Most Greek vases were wheel-made, though as with the Rhyton mould-made pieces (so-called "plastic" pieces) are also found and decorative elements either hand-formed or by mould were added to thrown pots. More complex ...