Since the probability per distance traveled for a neutron to collide with a nucleus is proportional to the material density, increasing the density of a fissile material can increase k. This concept is utilized in the implosion method for nuclear weapons.

Since the stadium's implosion the state championships moved to the Tacoma Dome in nearby Tacoma.

Since implosion weapons can be designed that will achieve yields in this range even if neutrons are present at the moment of criticality, fusion boosting allows the manufacture of efficient weapons that are immune to predetonation.

Since real political power belongs to the sole legal party, in certain states under Marxist constitutions of the constitutionally socialist state type inspired by the former Union of Soviet Socialist Republics ( USSR ) and its constitutive Soviet republics, there was no formal office of head of state, but rather the leader of the legislative branch was considered to be the closest common equivalent of a head of state as a natural person.

Since World War II the United Kingdom was forced to withdraw from the area, to be replaced by India, the USSR, and the United States.

Since 1991 – the last year of existence of the USSR – up to 1993 – the last year of rouble zone existence – the rate of inflation was measured in tens, hundreds and even thousands per cent per year.

Since its creation in 1934, the NKVD of the USSR underwent many organizational changes ; between 1938 and 1939 alone, the NKVD's structure changed three times.

Since the Entente Cordiale which had won the First World War, Britain's strategy for continental war was based on alliance with France and later unsuccessful efforts to engage Fascist Italy and the USSR in an effort to contain Germany.

Since 1921 under the Peace Treaty of Riga the territory belonged to Second Polish Republic, in 1939 it became a part of the USSR and since its fall in 1991-one of 6 provinces of independent Belarus.

Since the breakup of the USSR, the U. S team has become increasingly successful with the 1996 Olympic team victory of the Magnificent Seven in Atlanta, the 2003 Worlds team victory in Anaheim, and a multiple medal hauls in both WAG and MAG at the 2004 Olympics.

Since the PRC did not officially recognise the USSR as a socialist state, there was no official opinion about Gorbachev ’ s reformation of Soviet socialism.

Since 1933, the main scientific journal of the Soviet Academy of Sciences was the Proceedings of the USSR Academy of Sciences ( Doklady Akademii Nauk SSSR ); after 1992, it became simply Proceedings of the Academy of Sciences ( Doklady Akademii Nauk ).

Since the fall of the USSR, there have been five elections for the presidency and five for parliament.

Since they were originally built for the USSR, they had the correct gauge for Finland, too ( exactly ).

In the proceedings from the symposium, Tan Jiazhen is quoted as saying " Since USSR started to criticize Lysenko, we have dared to criticize him too ".

Since 1963 he worked in the Institute of Oriental Studies of the USSR Academy of Sciences.

Since 1988, Primakov was the Academician Secretary of the World Economy and International Relations Division, and the member of the Presidium of the USSR Academy of Sciences.

Since 1927, Article 20 of the Common Part of the penal code that listed possible " measures of social defence " had the following item 20a: " declaration to be an enemy of the workers with deprivation of the union republic citizenship and hence of the USSR citizenship, with obligatory expulsion from its territory ".

Since the end of Cold War Hannover International has become Germany's major airport for services to countries of the former USSR next to Frankfurt International.

Since 1934, he simultaneously worked also in the Physical Institute of the Academy of Sciences of the USSR.

Since 1948 there was a sincere rift in the relationships between the USSR and the SFR Yugoslavia as Yugoslav leader Josip Broz Tito established a socialist regime disregarding Joseph Stalin.

In the ethnic conflicts that erupted after the end of the Cold War, this lack of outer controls is seen as the cause ; Since there was no longer a strong centralized power ( in the form of the USSR ) to control the various ethnic groups, they then had to provide defense for themselves.

Since autumn 1990, Yeruham is actively involved in absorbing hundreds of olim from the Former USSR, who comprise 25 % of the town's nearly 10, 000 residents.

Since then distribution has spread into other Eastern European regions and former USSR countries, followed by success in China, Mongolia, and Francophone Africa, where it has representatives in Mali, Benin, Togo, Cameroon and Congo ( RDC ), and the Middle East.

Since 1964 and until 1986 Aleksandrov lived in Novosibirsk, heading the Laboratory of Geometry of the Institute of Mathematics of the Siberian Division of the USSR Academy of Sciences, teaching at Novosibirsk State University.

Since no officially licensed version of the NES was ever released in USSR, the Dendy was easily the most popular video game console of its time in that setting, and enjoyed a degree of fame roughly equivalent to that experienced by the NES / Famicom in North America and Japan.

Since the birth of the Armed Forces of the Russian Federation in the aftermath of the dissolution of the USSR, the old Soviet unit colours were retained.

Since 31 December 2003, the system has been closed to new users, at that time, it covered 100 % of the Spanish population, but now some antennas have been given to GSM operators.

Since the 2002 civil war in Côte d ' Ivoire, relations between it and Burkina Faso have been filled with accusations of Burkinabé support for rebels on one side and claims of mistreatment of Burkinabé workers on the other .< ref > Blaise Campaoré :<< La crise ivoirienne inquiète le Burkina >>, Le Figaro, December 11, 2005 </ ref > Côte d ' Ivoire remains Burkina Faso's largest regional trading partner in spite of their disputes and tens of thousands of Burkinabés continue to work in the Ivory Coast.

Since December 2007, the main regular presenters on the channel have been Simon McCoy, Carrie Gracie, Matthew Amroliwala, Jane Hill, Jon Sopel, Emily Maitlis, Louise Minchin, Huw Edwards, Ben Brown, Joanna Gosling and Chris Eakin.

Since the death of Medellín cartel leader Pablo Escobar in a police shootout during December 1993, indiscriminate acts of violence associated with that organization have abated as the " cartels " have broken up into multiple, smaller and often-competing trafficking organizations.

Since December 20, 1999, the defense of Macau has been the responsibility of the Chinese People's Liberation Army ( PLA ), which stations between 500-600 troops in the Macau Special Administrative Region of the People's Republic of China, primarily as a symbolic presence to underscore Chinese sovereignty.

Since the collapse of the Soviet Union on 31 December 1991, privately owned Russia-based multinational corporations, including producers of petroleum, natural gas, and metal have, in the view of some analysts, become oligarchs.

Since December 1994 the old town of Quedlinburg and the castle mount with the collegiate church are listed as one of UNESCO's World Heritage Sites.

Since a paper describing the algorithm had been published in August 1977, prior to the December 1977 filing date of the patent application, regulations in much of the rest of the world precluded patents elsewhere and only the US patent was granted.

Since 9 July 2009, the Prefect is Cardinal Angelo Amato, while the current secretary ( appointed 29 December 2010 ) is Archbishop Marcello Bartolucci

Since 2007, the Chargers have worn the alternate powder blue jerseys a total of eleven times, most recently in a December 18, 2011 game vs. the Baltimore Ravens.

Since the AFL Championship Game originally was scheduled for Monday, December 26 and the NFL Championship Game for Sunday, January 1 ( the reverse of the situation following the 1960 season ), it was suggested the " new " championship game be played Sunday, January 8.

Since self-determination is not recognized in the Spanish Constitution of 1978, some Basques abstained and some even voted against it in the referendum of December 6 of that year.

Since its debut on December 17, 1989, the show has broadcast

Since December 31, 1995, Turkey is also a part of the EU Customs Union.

Since the loss of these Dutch possessions in December 1949, " Indo people " also known as " Indische people " often refer to The Hague as " the Widow of the Indies ".

Since December 2005, They Might Be Giants have been making podcasts on a monthly, sometimes bi-monthly, basis.

Since the establishment of the United Arab Emirates in 2 December 1971, UAE adopted a balanced foreign policy based on adoption of dialogue, respect of international conventions, commitment to the United Nations Charter and non-interference of other country's internal affairs, and the settlement of disputes by peaceful means.

Since December 1945 Rickover had been Inspector General of the 19th Fleet on the US West Coast.

Since 2001, extremes at Hereford Credenhill have ranged from during July 2006, to as low as during December 2010

Since December 2002, a fast train transports passengers between Nizhny Novgorod and Moscow in less than five hours.

Since December 2006, various sources, including the Bulgarian National Television, national newspapers, research agencies, the mayor's office, and local police, claim that Varna has a population by present address of over 500, 000, making it the nation's second-largest city.

Since December 1994, the Zapatistas had been gradually forming several autonomous municipalities, more or less independent of the Mexican government.

Since December 2009, high speed commuter services from Dover have called at Folkestone and then, using the South Eastern Main Line to Ashford International, the services join HS1 for the journey to Ebbsfleet, Stratford and London St Pancras.

Since December 2009 the route between Hammersmith and Edgware Road has been served also by Circle line trains, meaning the Hammersmith & City line no longer has any stations unique to it.