Since the mid 1950s, when urethane foam first made its appearance in the American market, growth has been little short of fantastic.

Since the 1950s, this type of fiction has to a large extent merged with science fictional tropes involving cross-time travel between alternate histories or psychic awareness of the existence of " our " universe by the people in another ; or ordinary voyaging uptime ( into the past ) or downtime ( into the future ) that results in history splitting into two or more time-lines.

Since the 1950s, Prince Philip has also added herbaceous borders and a water garden.

Since the growth of global fishing enterprises after the 1950s, intensive fishing has spread from a few concentrated areas to encompass nearly all fisheries.

" Since the 1950s conservatism in the United States has been chiefly associated with the Republican Party.

* Since the 1950s, the United States Atomic Energy Commission has named its highest honor, the Fermi Award, after him.

Since the 1950s, hydrology has been approached with a more theoretical basis than in the past, facilitated by advances in the physical understanding of hydrological processes and by the advent of computers and especially geographic information systems ( GIS ).

Since the 1950s, many blues harmonica players have amplified their instrument with microphones and tube amplifiers.

Since the 1950s and 1960s in particular, the Irish have become assimilated into the British population.

Since the 1950s, following the lead of D. W. Jefferson, there are those who argue that, whatever its legacy of influence may be, Tristram Shandy in its original context actually represents a resurgence of a much older, Renaissance tradition of " Learned Wit " – owing a debt to such influences as the Scriblerian approach.

Since the 1950s, manga has steadily become a major part of the Japanese publishing industry, representing a ¥ 406 billion market in Japan in 2007 ( approximately $ 3. 6 billion ) and ¥ 420 billion ($ 5. 5 billion ) in 2009.

Since the 1950s however, manufacturing shortcuts have resulted in a quality decline of machetes.

Since trade was restricted in the 1950s they have found work as high altitude porters, guides, cooks and other accessories to tourism and alpinism.

Since the early 1970s, oral history in Britain has grown from being a method in folklore studies ( see for example the work of the School of Scottish Studies in the 1950s ) to becoming a key component in community histories.

Since the 1950s, the club's helmets have featured eagle wings, originally silver on a kelly green helmet.

Since the late 1950s, almost all phono input stages have used the RIAA equalization standard.

Since the 1950s, television has been the main medium for molding public opinion.

Since the 1950s, television has been the main medium for molding public opinion.

Since the 1950s, Montevideo's prosperous middle classes have tended to abandon the formerly fashionable downtown areas for the more modern high-rise apartment buildings of Pocitos, a beachfront neighborhood east of the center.

Since the late 1950s, aerospace engineers have used the term " unobtainium " when referring to unusual or costly materials, or when theoretically considering a material perfect for their needs in all respects, except that it does not exist.

Since the end of the 20th century, the economic strength during the 1920s has drawn close comparison with the 1950s and 1990s, especially in the United States of America.

Since the 1950s, Real Madrid and Barcelona have dominated the championship.

: Since the 1950s, both the atmospheric CO < sub > 2 </ sub > level and obesity levels have increased sharply.

Since then, the Cockney accent has been more accepted as an alternative form of the English Language rather than an ' inferior ' one ; in the 1950s the only accent to be heard on the BBC ( except in entertainment programmes such as Sooty ) was RP, whereas nowadays many different accents, including Cockney or ones heavily influenced by it, can be heard on the BBC.

`` Since when did they allow beardless kids into the saloon bars of this town, boys ''??

Since the Industrial Revolution, when factories emerged, this classical pattern has been followed.

Since charges are relatively the same, reserving a car before you leave for Europe will assure you of having one on tap when you want it.

Since a Skeletal Age rating can be made at any age during growth, from Elbow, Shoulder, Knee, or Foot as well as Hand, it seems to be the method of choice when one wishes to study most aspects of skeletal developmental progress during childhood.

Since marginal costs rise when the wage rate rises, the profit-maximizing price also rises when the public-limit price is elevated, and is likely to remain well above the latter.

Since this type of item was not in the statute when section 381 was enacted in 1954, one cannot say with certainty what effect the enactment of that section should have.

Since the days when their two thousand pairs of skis outnumbered those assembled anywhere else in the United States, the students have stopped regarding the Olympic Ski Team as another name for their own.

Since 30 June 2012 when the last leap second was added, TAI has been exactly 35 seconds ahead of UTC.

Since 2002, when the 27-year civil war ended, the country has worked to repair and improve ravaged infrastructure and weakened political and social institutions.

Since this holds true when performing addition on any real numbers, we say that " addition of real numbers is an associative operation.

Since 1954 when an organ instrumental of " New Britain " became a bestseller, " Amazing Grace " has been associated with funerals and memorial services.

Since 4 % can be expressed as. 04, gives the amount of alcohol in terms of ml — which, when divided by, shows the number of units.

Since 1885, when the Duke of Montrose constructed a road over the eastern shoulder of Craigmore to join the older road at the entrance of the Trossachs pass, Aberfoyle has become the alternative route to the Trossachs and Loch Katrine ; this road, known as the Duke's Road or Duke's Pass, was opened to the public in 1931 when the Forestry Commission acquired the land.

Since Daniel was a statesman during the Persian conquests, the Book of Daniel could have been written in a period when the Persians had their greatest influence on Aramaic, believed to be in the mid 6th century BC.

Since, when tried, this viscous ink would not flow into a regular fountain pen nib, Bíró, with the help of his brother György, a chemist, began to work on designing new types of pens.

Since May 2006, the simulcast begins with the programme at 06: 00 until 08: 30 when programming on BBC News begins.

Since 1971, when the Nixon administration decided to abolish fixed exchange rates, America's Current Account accumulated trade deficits have totaled $ 7. 75 Trillion as of 2010.

Since several elements are gases at commonly encountered temperatures, their densities are usually stated for their gaseous forms ; when liquefied or solidified, the gaseous elements have densities similar to those of the other elements.

Since a large percentage of the collisions between motor and pedal vehicles occur at night, bicycle lighting is recommended for safety when bicycling at night.

Since the surfaces of a wet clutch can be slippery ( as with a motorcycle clutch bathed in engine oil ), stacking multiple clutch discs can compensate for the lower coefficient of friction and so eliminate slippage under power when fully engaged.

Since the 1980s, following the popularization of computer technology, it has become fashionable in marketing for names of products and companies, and for 1990s online video games where players use pseudonyms ( when spaces were not allowed ).

Since the NCAA has yet to recognize cheerleading as an official college sport, there are no solid numbers on college cheerleading, yet when it comes to injuries, 67 % of female athlete injuries at the college level are due to cheerleading mishaps.