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The definition of massive hydraulic fracturing varies, but generally refers to treatments injecting over 150 short tons, or approximately 300,000 pounds (136 metric tonnes), of proppant. [ 48 ] American geologists gradually became aware that there were huge volumes of gas-saturated sandstones with permeability too low (generally less than 0.1 ...
The definition and usage of socialism settled by the 1860s, with the term socialist replacing associationist, co-operative, mutualist and collectivist, which had been used as synonyms, while the term communism fell out of use during this period. [47]
The Mach number is named after the physicist and philosopher Ernst Mach [3] according to a proposal by the aeronautical engineer Jakob Ackeret in 1929. [4] The word Mach is always capitalized since it derives from a proper name, and since the Mach number is a dimensionless quantity rather than a unit of measure, the number comes after the word Mach; the second Mach number is Mach 2 instead of ...
The definition of genocide generates controversy whenever a new case arises and debate erupts as to whether or not it qualifies as a genocide. Sociologist Martin Shaw writes, "Few ideas are as important in public debate, but in few cases are the meaning and scope of a key idea less clearly agreed."
The fingers have been compulsively picked and chewed in someone with excoriation disorder and dermatophagia. Compulsive picking of the face using nail pliers and tweezers. Episodes of skin picking are often preceded or accompanied by tension, anxiety, or stress. [6] In some cases, following picking, the affected person may feel depressed. [5]
Gaslighting is a colloquialism, defined as manipulating someone into questioning their own perception of reality. [1] [2] The expression, which derives from the title of the 1944 film Gaslight, became popular in the mid-2010s.
However, this definition may be questionable due to several court rulings (or government dismissals to avoid rulings) that the AR-15 lower receiver does not match the legal definition in 27 CFR § 479.11, [28] [29] [30] though a 2021 case from the Eighth Circuit found otherwise. [31]
The term meme is a shortening (modeled on gene) of mimeme, which comes from Ancient Greek mīmēma (μίμημα; pronounced [míːmɛːma]), meaning 'imitated thing', itself from mimeisthai (μιμεῖσθαι, 'to imitate'), from mimos (μῖμος, 'mime').