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 term " CPU " is generally defined as a device for software ( computer program ) execution, the earliest devices that could rightly be called CPUs came with the advent of the stored-program computer.

Since the advent of the Internet, the concept of community has less geographical limitation, as people can now gather virtually in an online community and share common interests regardless of physical location.

Since the advent of satellite positioning, such coordinate systems are typically geocentric: the axis is aligned with the Earth's ( conventional or instantaneous ) rotation axis.

Since the advent of the World Wide Web and computer software development, many graphic designers have become involved in interface design.

Since the advent of the World Cup in 1930, two trophies have represented victory: the Jules Rimet Trophy from 1930 to 1970, and the FIFA World Cup Trophy from 1974 to the present day.

Since the advent of digital video and computerized video processing, optical disc media and digital video recorders can now perform the same role as videotape.

Since the advent of technology, it is possible for aircraft and boats to parade.

Since the advent of the Global Positioning System, highly precise, yet affordable timing is available from many commercial GPS receivers.

Since the advent of radio, and then television, the speech has been broadcast live on most networks, preempting scheduled programming.

Since the advent of the internet, various people in both China and abroad have begun to argue online that the Cultural Revolution had many beneficial qualities for China that have been denied by both the post-Mao Chinese Communist Party and the Western media.

Since the advent of silicification, diatoms have made a significant impression on the fossil record, with major deposits of fossil diatoms found as far back as the early Cretaceous, and some rocks ( diatomaceous earth, diatomite, kieselguhr ) being composed almost entirely of them.

Since the 1980s, with the advent of flexible, yet stiff graphite ferrules, travel rod technology has greatly advanced, and multi-piece travel rods that can be transported in a suitcase or backpack constitute a large share of the market.

Since the advent of microcontrollers ( monolithic integrated circuits containing RAM, ROM and CPU all onboard ), the term " micro " is more commonly used to refer to that meaning.

Since the advent of graphical user interfaces, Fitts's law has been applied to tasks where the user must position a mouse cursor over an on-screen target, such as a button or other widget.

Since the advent of ham satellites in 1969, each has always been known as Orbital Satellite Carrying Amateur Radio – OSCAR.

Since the 1950s, the advent of mass tourism radically changed the face of both the city and island, transforming it into a centre of attraction for visitors and attracting workers from mainland Spain.

Since the advent of world cruises in 1922, by Cunard's Laconia, thousands of people have completed circumnavigations of the globe at a more leisurely pace.

Since the advent of the Convention on the Rights of the Child in 1989 ( children defined as under 18 ), almost every country ( except the U. S. & Somalia ) in the world has become voluntarily legally committed to advancing an anti-discriminatory stance towards young people of all ages.

Since the advent of the Interstate Highway System, Interstate 40 has largely diverted long-distance travel away from Wynne.

Since then, better transport and the advent of tourism has helped the city regain its fortunes.

Since the advent of high-power rocketry, which began in the mid-1980s with the availability of G-through J-class motors ( each letter designation has twice the energy of the one before ), a number of companies have shared the market for larger and more powerful rockets.

Since the advent of computer controlled systems this is accomplished by an automated systems in professional and even amateur equipment.

Since the advent of organized Matchbox collectors ' clubs ( see below, " Matchbox collectors "), models and their variations have been coded and catalogued, and values have been roughly established.