Since the 1960s, composite airframes and quieter, more efficient engines have become available, and Concorde provided supersonic passenger service for more than two decades, but the most important lasting innovations have taken place in instrumentation and control.

Since the 1960s, the islands have diversified away from their traditionally agriculture-based economy towards tourism and financial services, becoming one of the wealthiest areas in the Caribbean.

Since the 1960s, the bass guitar has largely replaced the double bass in popular music as the bass instrument in the rhythm section.

Since the 1960s, blackjack has been a high profile target of advantage players, particularly card counters, who track the profile of cards that have been dealt and adapt their wager and playing strategies accordingly.

Since the 1960s / 1970s, Blissymbols have become popular as a method to teach disabled or handicapped people to communicate.

Since the 1960s, applied ethics has revived the ideas of casuistry in applying ethical reasoning to particular cases in law, bioethics and business ethics, so the reputation of casuistry is somewhat rehabilitated.

Since the international adoption of the MKS standard in the 1940s and the SI standard in the 1960s, the technical use of CGS units has gradually declined worldwide, in the United States more slowly than elsewhere.

Since the early 1960s, it has been known that volcanism has occurred on other planets and moons in the Solar System.

Since then McLean has stated that the lyrics are also somewhat autobiographical and present an abstract story of his life from the mid-1950s until the time he wrote the song in the late 1960s.

Since at least the 1960s, macroeconomics has been characterized by further integration as to micro-based modeling of sectors, including rationality of players, efficient use of market information, and imperfect competition.

Since at least the 1960s, when Marc Bloch's Feudal Society ( 1939 ) was first translated into English in 1961, many medieval historians have included a broader social aspect that includes not only the nobility but all three estates of the realm, adding the peasantry bonds of manorialism and the estates of the Church ; this is sometimes referred to as " feudal society " since it encompasses all members of society into the feudal system.

Since the 1960s, West and later reunified Germany has been attracting migrants primarily from Southern and Eastern Europe as well as Turkey, many of whom ( or their children ) over time acquired German citizenship.

Since the 1960s rather complex mathematical models have been developed, facilitated by the availability of high speed computers.

Since the 1960s, academic history has seen the emergence of new approaches and topics such as social history, demographic history, ethnic history, women's history, environmental history and cultural history.

Since the 1960s and 1970s a large body of scholarship has provided evidence and analysis of the extent to which heterosexuality and homosexuality are socially organized and historically changing.

Since the 1960s various Scottish shops and manufacturers have created vegetarian haggis, substituting various pulses, nuts and vegetables for the meat in the dish.

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

Since the early 1960s, it has published 12 volumes, the first in 1971 and most recently in 2008 ; three more volumes are planned.

Since the 1960s, he has worked with public interest, consumer, family farm, environmental and community organizations at the local, state and national level.

Since the 1960s, orca has steadily grown in popularity ; both names are now used.

Since the 1960s, a theory based on Linear B phonetic values suggests that Linear A language could be an Anatolian language, close to Luwian.

Since the beginning of the 1960s Ladoga has become considerably eutrophicated.

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

Since the 1960s, the number of people claiming Native American ancestry has grown significantly and by the 2000 census, the number had more than doubled.

Since the 1960s the Chief rabbinate of Israel has moved somewhat closer to the positions of Haredi Judaism.

Since various Molly Pitcher tales grew in the telling, many historians regard Molly Pitcher as folklore rather than history, or suggest that Molly Pitcher may be a composite image inspired by the actions of a number of real women.

Since 1974 with the publication of Elizabeth A. R. Brown's The Tyranny of a Construct, and Susan Reynolds ' Fiefs and Vassals ( 1994 ), there has been ongoing inconclusive discussion among medieval historians as to whether feudalism is a useful construct for understanding medieval society.

Since Joseph de Guignes in the 18th century, historians have associated the Huns who appeared on the borders of Europe in the 4th century with the Xiongnu who migrated out of the Mongolia region some three hundred years before.

Since the release, critics and film historians have seen Night of the Living Dead as a subversive film that critiques 1960s American society, international Cold War politics and domestic racism.

Since its discontinuation, the 3DO has been frequently derided by video game historians.

Since 1970, the opening of new records has led historians to rehabilitate Kitchener's reputation to some extent.

Since it is a rather recent development in historiography, many historians dismiss counterfactual history as sometimes entertaining, but not meeting the standards of mainstream historical research due to its speculative nature.

Since Mao's death there has generated a great deal of controversy about the multi-dimensional man amongst both historians and political analysts.

Since the 1980s, however, historians ( notably Dorothy Thompson ) have emphasised the indispensable contribution O ' Connor made to Chartism.

Since 1998 and the DNA study, many historians have accepted that the widower Jefferson had an intimate relationship with Hemings, and fathered six children with her, four of whom survived to adulthood.

Since his death, he has been celebrated by American art historians as " the strongest, most profound realist in nineteenth-and early-twentieth-century American art ".

Since the 1950s, historians, linguists, and archeologists have found evidence of a distinct people, the St. Lawrence Iroquoians, who inhabited the areas along the St. Lawrence River from before 1300 until the late 16th century.

Since 2005 the archive has been housed in the Museo Vostell Malpartida and is available to art historians, journalists and authors.

Since then, a number of books, mostly accompanying exhibitions of Miller's photographs, have been written by art historians and writers such as Jane Livingstone, Richard Calvocoressi, and Mark Haworth-Booth.

Since then historians have increasingly researched childhood in past times.

The gradual evolution of consensus about the meaning of Carl Andre's art can be found in About Carl Andre: Critical Texts Since 1965, published by Ridinghouse in 2008. The most significant essays and exhibition reviews have been collated into one volume, including texts written by some of the most influential art historians and critics: Clement Greenberg, Donald Kuspit, Lucy R. Lippard, Robert C. Morgan, Barbara Rose and Roberta Smith.

Since the 1890s historians have vigorously debated the nature of Populism ; most scholars have been liberals who admired the Populists for their attacks on banks and railroads.

Since the collapse of communism, there has been a renaissance, led especially by historians of the early modern era, in the history of diplomacy.

Since the empire took on trappings of a Chinese state, Chinese historians generally refer to the empire as the Western Liao Dynasty, emphasizing its continuation from the Liao Dynasty in North and Northeast China.

Since he was deposed in a coup, later official historians did not give him a temple name like Taejo or Sejong.

Since it never had a national membership form or national dues, and local chapters were quite autonomous, historians suggest that the organization's leaders had no idea how many " members " it had.

Since she gained the courtesy title of Viscountess Rochford by marriage, she was usually known at Court ( and by subsequent historians ) as " Lady Rochford ".

Since the 19th century, various historians have claimed that the Romans plowed over the city and sowed salt into the soil after destroying it, but this is not supported by ancient sources.