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, when Lacan and Foucault argued that each epoch has its own knowledge system, which individuals are inexorably entangled with, many post-structuralists have used historicism to describe the view that all questions must be settled within the cultural and social context in which they are raised.

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 the publication of Pelliot's article, archeological excavation in Vietnam and Cambodia, especially excavation of sites related to the Oc Eo culture, have supported and supplemented his conclusions.

Since the 1960s, numerous surveys have been undertaken in the Nares Strait region, including seismic, ice flow, mapping, archeological and economic surveys.

Since the 1970s, El Tajin has been the most important archeological site in Veracruz for tourists, attracting over 650, 000 visitors a year.

Pre-Columbian rock art in the Indian Hill archeological area. Since the late 19th century, numerous scientific studies and published papers have centered on the marine organisms that inhabited the ancient Sea of Cortez.

Since 1907, the EFEO has been in charge of conservation work at the archeological site of Angkor.

Since the 19th century, numerous archeological finds have been made in the Butmir neighborhood, dating from Neolithic times.

Since 21 February 2009 in the northern barchesse of the Villa is housed the National archeological museum of Fratta Polesine ( Museo archeologico nazionale di Fratta Polesine ).

Since 2005, archeological excavations at the fort site have shown that extensive artifacts and stratigraphy have survived and can be interpreted.

Since then, much of the municipality ’ s history has been tied to the archeological site.

Since the 1970s, El Tajin has been the most important archeological site in Veracruz for tourists, attracting over 650, 000 visitors a year.

Since many commentators view the notion of sense as identical to the notion of concept, and Frege regards senses as the linguistic representations of states of affairs in the world, it seems to follow that we may understand concepts as the manner in which we grasp the world.

Since neither Sapir nor Whorf had ever stated an actual hypothesis, Brown and Lenneberg formulated one based on a condensation of the different expressions of the notion of linguistic relativity in their works.

Since the tradition of research on color terminology is by far the largest area of research into linguistic relativity it is described below in its own section.

Since then, there has been significant comparative linguistic work expanding outside of European languages as well, such as on the Austronesian languages and various families of Native American languages, among many others.

Since there are no universally accepted criteria for distinguishing languages from dialects, scholars and other interested parties often disagree about the linguistic, historical and social status of Scots.

Since the Fuzhou immigrants have a strong cultural and linguistic background difference from the Cantonese people, the Fuzhou immigrants were unable to integrate well into Manhattan's Chinatown, which was still very Cantonese dominated and as a result they carved out their own separate Chinatown on East Broadway.

Since there was no linguistic contact with France from the late eighteenth century until the twentieth century, Acadian French retained features that died out during the French standardization efforts of the nineteenth century.

Since the 1960s the Frankfurt School has been guided by Jürgen Habermas ' ( born 1929 ) work on communicative reason, linguistic intersubjectivity and what Habermas calls " the philosophical discourse of modernity ".

: Since the mid 1950s, the amount of published material on SA America has been gradually growing, but even so, the number of researchers is far smaller than the growing number of linguistic communities whose speech should be documented.

Since the 1980s, there have been some organized efforts to preserve the cultural and linguistic heritage of Arvanites.

Since the 1960s, Frankfurt School critical theory has increasingly been guided by Jürgen Habermas ' work on communicative reason, linguistic intersubjectivity and what Habermas calls " the philosophical discourse of modernity ".

Since the early 1990s, the theory of linguistic imperialism has attracted attention among scholars of applied linguistics.

Since African-American migrants retained many Southern cultural and linguistic traits, such cultural differences created a sense of " otherness " in terms of their reception by others who were living in the cities before them.

Since the advent of queer studies in universities, LGBT slang and argot has become a subject of academic research among linguistic anthropology scholars.

Since the 1980s, some efforts have been organized to preserve the cultural and linguistic heritage of the language.

Since the comparative material attributable to the extinct members of Oghuric ( Hunnic, Turkic Avar, Khazar and Bulgar ) is scant, little is known about any precise interrelation of these languages and it is a matter of dispute whether Chuvash, the only " Lir "- type language with sufficient extant linguistic material, might be the daughter language of any of these or just a sister branch.

Since then, linguistic theories have been developed to describe languages all over the world.

Since ogham inscriptions consist almost exclusively of personal names and marks possibly indicating land ownership, linguistic information that may be glimpsed from the Primitive Irish period is mostly restricted to phonological developments.

Since 2008, CIEMEN has been lobbying to place linguistic rights on the agenda of the states that are currently members of the United Nations Human Rights Council ( UNHRC ).

Since non-literary, simple Greek knowledge or competency in multiple languages was relatively widespread in Jewish Palestine including Galilee, and a Greek-speaking community had already developed in Jerusalem shortly after Easter, one can assume that this linguistic transformation " the Aramaic native language of Jesus " to " the Greek Gospels " began very early.

Since all other linguistic terms for broadswords are used to describe a two-handed ( or hand-and-a-half ) type sword, the broadsword's meaning in the late medieval and early Renaissance context should also be that of a two-handed sword.

Since independence, the government has pursued a policy of linguistic Arabization of education and bureaucracy, which has resulted in limiting the use of Berber and the Arabization of many Berber-speakers.

Since many of the ' characteristics ' in Hong Kong English are perceived as erroneous, the term is often used by locals as a disparagement rather than to describe a linguistic identity.

Since Goodwin, other researchers have disputed his conclusion of five linguistic groups, but have agreed on three main Apachean dialects with several subgroupings: