Since the 1920s this discrepancy has been explained by the presence of isotopes ; the atomic mass of any isotope is very close to satisfying the whole number rule, with the mass defect caused by differing binding energies being significantly smaller.

Since the 1920s, Oxford has been the most popular candidate among " anti-Stratfordians ," a collective term for adherents of the various alternative-authorship theories.

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 1920s, it has experienced rapid growth and established many industries for agricultural products and machinery, textiles, pharmaceuticals, metal products, and services.

Since the 1920s, the two largest political parties have been the Conservative Party and the Labour Party.

Since the 1920s, X-ray diffraction has been the principal method for determining the arrangement of atoms in minerals and metals.

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 1920s, the appearance of the " modern girl " ( moga ) and " modern boy " ( mobo ) saw an increase in the number of women taking on the role of industrial and white-collar workers and consumers.

Since the 1920s, Lancaster had been the much larger and principal community of the Antelope Valley, as well as the rest of California's Mojave Desert.

Since the 1960s Leiston became famous outside the UK as the home of the Summerhill School, founded by A. S. Neill in the 1920s, which was the first major " free school "-referring to freedom in education.

Since the district's period of significance extends to 1944, most of those buildings erected after the 1920s were built as infill within the areas already subdivided by the 1920s.

Since the district's period of significance extends to 1944, most of those buildings erected after the 1920s were built as infill within the areas already subdivided by the 1920s.

Since the early 1920s, 150 movies and about a dozen television shows have been filmed here, including Tom Mix films, Hopalong Cassidy films, The Gene Autry Show, and The Lone Ranger.

Since the 1920s, the economy has been based primarily on agriculture.

Since the 1920s, an increasingly elaborate sub-culture of organized science fiction fandom has arisen, initially among correspondents to the letter columns of science fiction magazines.

Since the 1920s, Governors-General have acted solely on the advice of the local ministers, rather than on that of the British Government.

Since the 1920s the Wallabies have worn green and gold jerseys.

Since the late 1920s the tension between the air and naval services had declined.

Since the 1920s, the street's name has been synonymous with the American advertising industry.

Since the early 1920s, this modern vernacular form has been the standard style of writing for speakers of all varieties of Chinese throughout mainland China, Taiwan, Malaysia and Singapore as the written form of Modern Standard Chinese.

Since late 1920s, nearly all Chinese newspapers, books, and official and legal documents have been written in vernacular Chinese using the national standard.

Since the 1920s, 1.

Since the 1951 general election, the party system has been dominated by the personalist Antigua Labour Party ( ALP ), dominated by the Bird family, particularly Prime Ministers Vere and Lester Bird.

Since the English Reformation, the Church of England has been more explicitly a state church and the choice is legally that of the British crown ; today it is made in the name of the Sovereign by the Prime Minister, from a shortlist of two selected by an ad hoc committee called the Crown Nominations Commission.

Since 1997, all newly-found Mersenne primes have been discovered by the “ Great Internet Mersenne Prime Search ” ( GIMPS ), a distributed computing project on the Internet.

Since the office was not created, there is no " first " Prime Minister.

Since 1722, most Prime Ministers have been members of the Commons ; since 1902, all have had a seat there.

Since then, no Sovereign has tried to impose a Prime Minister on Parliament.

Since " Prime Minister " is a position, not a title, the incumbent should be referred to as " the Prime Minister ".

Since the establishment of the Slovak Republic in January 1993, Slovakia has undergone a transition from a centrally planned economy to a free market economy, a process which some observers were to believe was slowed in the 1994-98 period due to the crony capitalism and other fiscal policies of Prime Minister Vladimír Mečiar's government.

Since most other countries only have their Prime Ministers representing them, it was also decided in Finland that the task is reserved for the Prime Minister in most cases.

Since the independence, the West-Pakistan was a parliamentary republic ( even as of today, the parliamentary system is the official form of government of Pakistan ) with Prime minister as the head of the government and President as head of state, although Presidential office is ceremonial office.

Since the full restoration of democracy in 1991, only one man, Jerzy Buzek, has served a full four-year term as Prime Minister.

Since the E1 component of nuclear EMP depends on the prompt gamma ray output, which was only 0. 1 % of yield in Starfish Prime but can be 0. 5 % of yield in pure fission weapons of low yield, a 10 kiloton bomb can easily be 5 x 8 % = 40 % as powerful as the 1. 44 megaton Starfish Prime at producing EMP.

Since Maskelyne's observations and calculations were made at the Royal Greenwich Observatory, the Greenwich meridian eventually became a common base for longitude worldwide and was adopted internationally as the Prime Meridian in 1884.

Since Star Trek has consistently used alien interactions as an allegory for the real world, the Prime Directive has served as a template to tell stories which resemble those of real human societies and their interactions with less technologically advanced societies, such as the interaction between modern cultures and indigenous peoples.

Since then the Prime Directive has been breached on many occasions, both accidentally and deliberately.

Since 1948, these cabinets were led by PvdA Prime Minister Willem Drees.

Since 1972, Koizumi is the only Prime Minister to have served more than five years in office.

Since 1965 only one new baronetcy has been created, that ( on 7 Dec 1990 ), for the husband of former Prime Minister Margaret Thatcher ( now Baroness Thatcher ), Sir Denis Thatcher.

Since 19 November 2008, the Prime Minister has been John Key of the National Party.

Since then it has been endowed with papers from other political figures including former Prime Ministers Margaret Thatcher and John Major, as well as former Leader of the Opposition Neil Kinnock, alongside those of eminent scientists and engineers, including Reginald Victor Jones, Rosalind Franklin and Sir Frank Whittle.

Senator of Vienne: Elected in 1995, but he stays minister / 1997 – 2002 ( Became Prime minister in 2002 ) / Re-elected in 2004, but he stays Prime minister / Since 2005.