Quantum computers may eventually crunch through currently unapproachable problems, improving the transmission of electric power or the manufacture of energy-intensive fertiliser, or simply sifting through impracticably large data sets.
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It's not clear how high a price would have to be to fully offset the additional costs of alternatives — in certain applications, it will likely be impracticably high, so sector-specific policies will still be needed — but any price at all would help.
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A clip of the scene where Mr. Bean puts the balloons on the pram was shown in an episode of MythBusters, in which it was tested whether a large number of balloons could indeed lift a small child into the sky. It was proven to be plausible, although an impracticably large number of balloons were needed for it to actually work.
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This was achieved by transforming a group of largely autonomous scientific divisions into a unified institution with a clear mission and a fully coordinated research program. The first attempt at reorganization vested power in an executive committee composed of all the division superintendents. This committee was impracticably large, so in 1949, a civilian director of research was named and given full authority over the program. Positions for associate directors were added in 1954.
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The best crystals are obtained from the liquid phase, but the growth is impracticably slow – several months for a 5–10 mm crystal. Growth from the vapor phase is a reasonable compromise in terms of speed and quality. Adamantane is sublimed in a quartz tube placed in a furnace, which is equipped with several heaters maintaining a certain temperature gradient (about 10 °C/cm for adamantane) along the tube. Crystallization starts at one end of the tube, which is kept near the freezing point of adamantane.
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Another disadvantage is that the brakes constantly dissipate vast amounts of heat when steering, which is very power-inefficient. The brakes suitable to steer a large vehicle are also impracticably large. Clutch braking was introduced by the French in 1916 during World War I. Most light tanks used it through the 1920s and 30, as well as some larger tanks like the British experimental Vickers Independent and Soviet T-35. The last major designs to use it were the Soviet T-34 and German Panzer III and Panzer IV.
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Radon removal from water supplies may be at a treatment plant, point of entry, or point of use. Public water supplies in the United States were required to treat for radionuclides beginning in 2003 but private wells are not regulated by the federal government . The radon can be captured by granular activated charcoal (GAR) or released into the air through aeration of the water. Radon will naturally dissipate from water over a period of days, but the quantity of storage needed to treat the water in this manner makes home systems of this type impracticably large.
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This is a particular issue if the entire phrase can be found in a book of quotations or phrase compilations. However, the required effort (in time and cost) can be made impracticably high if there are enough words in the passphrase and how randomly they are chosen and ordered in the passphrase. The number of combinations which would have to be tested under sufficient conditions make a dictionary attack so difficult as to be infeasible. These are difficult conditions to meet, and selecting at least one word that cannot be found in any dictionary significantly increases passphrase strength.
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They remained close throughout Burt's life; Foster was sole executor of Burt's estate in 1805, and Burt's will left ". . . to my trusty friend Joseph Foster of Boston, Goldsmith one hundred dollars." He worked circa 1781-1830 as a silversmith in Boston, with a shop on Ann Street and later on Fish Street near Burt. Foster was recalled by Colonel Henry Lee in 1881 as follows: "An anxious visit of inquiry to 'honest Foster', the silversmith, who, in his long coat, knee-breeches and silver buckles, dwelt with his spinster sister in an impracticably low-jettied house, one step below the narrow sidewalk, and, as old-fashioned housekeepers believed, beat his silver to a superior whiteness".
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Lam referred to the need for all elections to be conducted fairly, openly and honestly. Under existing law, the Chief Executive can delay an election up to 14 days if he or she believes it is likely to be "obstructed, disrupted, undermined or seriously affected by riot or open violence or any danger to public health and safety." However Lam postponed the election until 5 September 2021 under the Emergency Regulations Ordinance, which gives the Chief Executive broad emergency powers to make any regulations considered to be "desirable in the public interest", claiming the uncertainty of the COVID-19 outbreak makes the 14-day delay impracticably short. As Article 69 of the Basic Law stipulates that the term of the LegCo shall be four years, meaning that the term of the 6th Legislative Council must end on 30 September 2020, the postponement created a lacuna in the Legislative Council between 30 September 2020 and the next election.
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Fairbairn began a series of practical experiments on various tube shapes and enlisted the help of Eaton Hodgkinson "distinguished as the first scientific authority on the strength of iron beams" It became apparent from Fairbairn's experiments that- without special precautions - the failure mode for the tube under load would be buckling of the top plate in compression, the theoretical analysis of which gave Hodgkinson some difficulty. When Stephenson reported to the directors of the railway in February 1846, he attached reports by both Hodgkinson and Fairbairn. From his analysis of the resistance to buckling of tubes with single top plates, Hodgkinson believed that it would require an impracticably thick (and therefore heavy) top plate to make the tubes stiff enough to support their own weight, and advised auxiliary suspension from link chains. However, Fairbairn's experiments had moved on from those covered by Hodgkinson's theory to include designs in which the top plate was stiffened by 'corrugation' (the incorporation of cylindrical tubes).
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