Since the late 1930s alloy steels have been used for frame and fork tubes in higher quality machines.

Since the early 1930s, the company has promoted spin-off reference works.

Since the 1930s, prices and wages had been controlled, but money had been plentiful.

Since the 1930s, the Estrada Doctrine has served as a crucial complement to these principles.

Since the 1930s, all nations have closely monitored the inflow and outflow of capital, and most economists agree that a favorable balance of trade is desirable.

Since the 1930s, Paraguayans have regarded Solano López as the nation's foremost hero.

Since the late 1930s, SF fans have organized conventions, non-profit gatherings where the fans ( some of whom are also professionals in the field ) meet to discuss SF and generally enjoy themselves.

Since the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such a device were built.

Since the early 1930s, the Polish government introduced a set of policies designed to Polonize all minorities ( Belarusians, Ukrainians, Jews, etc .).

Since the 1930s, many rural workers have moved to the big cities.

Since the late 1930s the monoplane has been the most common form of plane.

Since the 1930s the Hill Cumorah Pageant is held annually at the hill by The Church of Jesus Christ of Latter-day Saints and regularly attracts thousands to its performances.

Since the 1930s, however, coups d ' état have disrupted this democracy.

Since achieving stability in the early 1930s, the NFL had never fielded more than 10 teams.

Since the late 1930s it has been the most common form for a fixed wing aircraft.

Since the 1930s industrial construction of the city has begun.

Since the 1930s, the city of John Day has served as the main economic center of the county, and boasts the largest population.

Since its crystallization in the 1930s, computation has been primarily approached from two traditions: engineering, which seeks to build practical systems using computations ; and mathematics, which seeks to prove theorems about computation ( albeit already in the 1970s computing as a discipline was described as being at the intersection of mathematical, engineering, and empirical / scientific traditions ).

Since then, the Old Regent has been painstakingly rebuilt and restored once again, including recreating historic panels in the auditorium and the original 1930s carpeting.

Since it was also miles away from the Plandome Road School, the Manhasset school district built a conveniently located Munsey Park Elementary School in the 1930s.

Since the 1930s, Calabash has been known for its distinctive style of fried seafood, which has come to be known as " Calabash Style.

Since then, the City of Etowah has ridden the waves of economic downturns and successes, such as the closing of the L & N shops in the 1930s and the recruitment of new industries, to evolve into the city that it is today.

Since the 1930s, the Baak Doi label heaquartered in Shanghai had been published under the EMI banner and since then, EMI had also been the dominant label in the cantopop market in Hong Kong until the genre's decline in the mid 1980s.

Since the 1930s, construction kits compatible with Meccano were manufactured in the Soviet Union.

Since then, American English has been influenced by the languages of West Africa, the Native American population, Spanish, and immigration.

Since 31 December 2003, the system has been closed to new users, at that time, it covered 100 % of the Spanish population, but now some antennas have been given to GSM operators.

Since the temple was not considered a place of worship for use by the population at large, but rather a home for the deity, the sanctuary needed only to be large enough to hold the statue or linga ; it was never more than a few metres across.

Since 1991, Croatia's death rate has continuously exceeded its birth rate ; the natural growth rate of the population is currently negative.

Since the Yellowstone gray wolf reintroduction in 1995 and 1996, the local coyote population went through a dramatic restructuring.

Since these first accounts, Bulgarian authorities had organized several population censuses: 1892, 1900, 1905, 1910, 1920, 1926, 1934, 1946, 1956, 1965, 1975, 1985, 1992, 2001 and 2011.

) Since 2001 the population census has been combined with the housing statistics.

Since 2010, the population census has been carried out and analysed annually in a new format by the Federal Statistical Office ( FSO ).

Since dachshunds are prone to back issues, the goal is to expand this treatment to dogs in a normal population.

Since 1990, Estonia lost about 15 % of its population ( 230, 000 people ).

Since many insurgents rely on the population for recruits, food, shelter, financing, and other materials, the counter-insurgent force must focus its efforts on providing physical and economic security for that population and defending it against insurgent attacks and propaganda.

Since Indiana was first settled in its southern tier ( the state's first capital, Corydon, is in the south near the Ohio River ), it is hypothesized that the name was carried as the population expanded northward in the state.

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

Since the end of the whaling and sealing era, most of the islands ' species have been able to increase their population again.

Since 1945, Polish Catholics make up the majority of the population.

Since the previous census in 2000 the country's population decreased by 309 thousand or 13 %.

Since the 1960s, the mainland population has declined by 60-70 %; though there has been a small increase on Motunau Island.

Since all people including the most isolated indigenous groups such as the Andamanese or the Tasmanian aboriginals possess language, then it was presumedly present in the ancestral populations in Africa before the human population split into various groups to inhabit the rest of the world.

Since 1999, the government has embarked on reforms in higher education designed to meet the needs of a growing population.

Since a proportion must be between 0 and 1, inclusive, the index α must be positive, but in order for the total income of the whole population to be finite, α must also be greater than 1.

Since no accurate data were recorded, it is only possible to give estimates on the size and population of these nesting areas.

Since the lifetime of the laser transition L is long compared to that of Ra ( τ < sub > 32 </ sub > ≫ τ < sub > 43 </ sub >), a population accumulates in level 3 ( the upper laser level ), which may relax by spontaneous or stimulated emission into level 2 ( the lower laser level ).

Since only a few atoms must be excited into the upper laser level to form a population inversion, a four-level laser is much more efficient than a three-level one, and most practical lasers are of this type.

Since then, pizza became increasingly popular among the rest of the population.