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 1959, most ideas for space elevators have focused on purely tensile structures, with the weight of the system held up from above.

Since an arbalest was much larger than earlier crossbows, and because of the greater tensile strength of steel, it had a greater force.

Since a length of pipe undergoing vibration experiences alternate tensile and compressive forces as waves along its longitudinal axis ( and therefore longitudinal strains ), its diameter will expand and contract in unison with the applied tensile and compressive waves.

Since the ends of CWR are fixed the rail will experience tensile stress in extreme cold and can fracture if it grows too great.

Since concrete possesses very low tensile ( pulling ) strength, many people from both the public and the engineering community believed that a concrete tower as tall as the plan for the Ingalls Building would collapse under wind loads or even its own weight.

Since Fire Temple was at least partially built to conform to the dimensions of the cliff alcove in which it was built, it is neither round in form nor truly subterranean like other structures defined as kivas

Since they are polymers, biopolymers contain monomeric units that are covalently bonded to form larger structures.

Since database structures are complex, in most cases, and especially for not-very-simple queries, the needed data for a query can be collected from a database by accessing it in different ways, through different data-structures, and in different orders.

Since database structures are complex, in most cases, and especially for not-very-simple queries, the needed data for a query can be collected from a database by accessing it in different ways, through different data-structures, and in different orders.

Since then, other variant designs involving building an artificial structure or series of structures to encompass a star have been proposed in exploratory engineering or described in science fiction under the name " Dyson sphere.

Since the late 19th century, differential geometry has grown into a field concerned more generally with the geometric structures on differentiable manifolds.

Since ortho derivatives of benzene were never actually found in more than one isomeric form, Kekulé modified his proposal in 1872 and suggested that the benzene molecule oscillates between two equivalent structures, in such a way that the single and double bonds continually interchange positions .< ref >

Since lyotropic liquid crystals rely on a subtle balance of intermolecular interactions, it is more difficult to analyze their structures and properties than those of thermotropic liquid crystals.

Since these concepts are formally defined in the article on structures, the present article can content itself with an informal introduction which consists in examples of how these terms are used.

Since RNA is charged, metal ions such as Mg < sup > 2 +</ sup > are needed to stabilise many secondary and tertiary structures.

Since that success, over 73761 X-ray crystal structures of proteins, nucleic acids and other biological molecules have been determined.

Since the establishment of America ’ s first historic site at Washington ’ s Revolutionary headquarters at Hasbrouck House in New York State, Americans have found a penchant for preserving similar historical structures.

Since then, most of the Hanford reactors have been entombed (" cocooned ") to allow the radioactive materials to decay, and the surrounding structures have been removed and buried.

Since these weapons delivered lighter munitions ( thus delivering less energy on impact ) it is a widely held opinion that they were used more as an anti-personnel role, or to destroy lighter structures.

Since the administrative reforms of 1996, the régions of Senegal, which until then were merely local administrative structures of the central state, have been turned into full-fledged political units, with democratically elected regional councils, and regional presidents.

Since fungi are often classified according to their spore-producing structures, these spores are often characteristic of a particular taxon of the fungi.

Since the physical structures of the Earth's surface have changed over geologic time, palaeogeographers have coined various names for ancient regions that no longer exist, from very large regions such as the supercontinents Rodinia, Pangaea, and Pannotia, to relatively small regions like Beringia.

Since its formation, the group had been preparing their first multimedia project " Rdeči revirji " (" Red District "), aiming to provoke the current political structures in Trbovje.

Since the 1960s, artist William Christenberry, born in Tuscaloosa, has been photographing various structures in Hale County as part of his multi-media artistic investigations.

Since the mid 20th century chemical fluorescent stains, such as DAPI which binds to DNA, have been used to label specific structures within the cell.

Since the mid-1970s, the building has housed the Rochester Community Schools Board of Education offices and occasional related events, and is certainly one of the largest and noteworthy structures in the city.

Since then several million dollars have been spent rehabilitating and restoring the castle and surrounding structures.

Since the late 19th century, means of reaching tall structures have been devised.

Since 2004 these structures are protected as Scheduled Monuments.