Since the adoption of a new constitution, early in 2010, the politics of Angola takes place in a framework of a presidential republic, whereby the President of Angola is both head of state and head of government, and of a multi-party system.

Since early 1989, Aztlan Underground has played Rapcore.

Since early 2008, Armenia's entire rail network is managed by the Russian state railway.

Since the early 1990s, many American Chinese restaurants influenced by California cuisine have opened in San Francisco and the Bay Area.

Since its inception in the early 1990s, the group has carried out bombings, kidnappings, assassinations and extortion in what they describe as their fight for an independent Islamic province in the Philippines.

Since early BBSes were frequently run by computer hobbyists, they were typically technical in nature with user communities revolving around hardware and software discussions.

Since the early 20th century, the armed forces have pursued the goal of weapons self-sufficiency.

Since the early 20th century it has been commonly accepted that Old Irish Bel ( l ) taine is derived from a Common Celtic * belo-te ( p ) niâ, meaning " bright fire " ( where the element * belo-might be cognate with the English word bale in ' bale-fire ' meaning ' white ' or ' shining '; compare Anglo-Saxon bael, and Lithuanian / Latvian baltas / balts, found in the name of the Baltic ; in Slavic languages byelo or beloye also means ' white ', as in Беларусь ( White Russia or Belarus ) or Бе ́ лое мо ́ ре Sea ).

Since early 1989 the government recognizes both Israel and the Palestinian state.

Since the early 1990s it was generalized in systemics for the investigation of functional human-like intelligence models, such as personoids, and, in parallel, developed as the SOAR environment.

Since the invention of the MIDI system in the early 1980s, for example, some people have worked on programs which map MIDI notes to an algorithm and then can either output sounds or music through the computer's sound card or write an audio file for other programs to play.

Since the early 21st century within the global functional food industry, raw cranberries have been marketed as a " superfruit " due to their nutrient content and antioxidant qualities.

Since then, many other drugs have been developed to treat cancer, and drug development has exploded into a multibillion-dollar industry, although the principles and limitations of chemotherapy discovered by the early researchers still apply.

Since his early childhood he spent his free time by drawing on any material he could find.

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

Since early childhood Don Rosa had been fascinated by Carl Barks ' stories about Donald Duck and Scrooge McDuck.

The early 1980s saw further chart successes in the US with " Since I Don't Have You ", a new recording of " Castles in the Air " and " It's Just the Sun ".

Since the early 1930s, the company has promoted spin-off reference works.

Since the early 1990s, the Britannica has faced new challenges from digital information sources.

Since he was on the losing side of the long 4th-century contest between the allies and enemies of Arianism ( Eusebius was an early and vocal supporter of Arius ), posterity did not have much respect for Eusebius ' person and was neglectful in the preservation of his writings.

Since the early twentieth century, quantum theory has proved to be successful in describing accurately the physical reality of the mesoscopic and microscopic world, in multiple reproducible physics experiments.

Since the early 1980s, Smyril Line has operated a regular international passenger, car and freight service using a large, modern, multipurpose ferry, the Norröna.

Since early 2010, an agreement was established between the General Council, responsible for organizing transport between the towns, and some carriers Taxi Co.

Since the early years of the twentieth century, absolute dating methods, such as radiometric dating ( including potassium / argon, argon / argon, uranium series, and, for very recent fossils, radiocarbon dating ) have been used to verify the relative ages obtained by fossils and to provide absolute ages for many fossils.

Since the early 2000s most consumer hard drive capacities are grouped in certain size classes measured in gigabytes.

Since direct observations of climate are not available before the 19th century, paleoclimates are inferred from proxy variables that include non-biotic evidence such as sediments found in lake beds and ice cores, and biotic evidence such as tree rings and coral.

Since the 19th century, US foreign policy also has been characterized by a shift from the realist school to the idealistic or Wilsonian school of international relations.

Since these geographic considerations imply that, not including the hill within, the walls would be willfully making the city prone to attack from it, some scholars, including the late 19th century surveyors of the Palestine Exploration Fund, consider it unlikely that a wall would ever have been built that would cut the hill off from the city in the valley ; archaeological evidence for the existence of an earlier city wall in such a location has never been found.

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

Since the 19th century, it has been the most commonly used script for Sanskrit.

Since the 19th century, Venezuela has claimed all of Guyana west of the Essequibo River — 62 % of Guyana's territory.

Since the 19th century, humanism has been associated with an anti-clericalism inherited from the 18th-century Enlightenment philosophes.

Since the 19th century it has become associated with the wider culture of Scotland in general, or with Celtic ( and more specifically Gaelic ) heritage even more broadly.

Since its origins in the 19th century, Mormonism has been compared to Islam, often by detractors of one religion or the other.

Since 1721, every head of the Sovereign's government – with one exception in the 18th century ( William Pitt the Elder ) and one in the 19th ( Lord Salisbury ) – has been First Lord of the Treasury.

Since the rise of experimental psychology in the late 19th Century, psychology's understanding of perception has progressed by combining a variety of techniques.

Since the 18th century, particularly during the late 19th and early 20th centuries, some wealthy or ennobled families embraced Catholicism, including branches of the Asquith, Bellingham ( Ireland ), Bowyer ( England ), Calvert ( Maryland ), Cary-Elwes / Elwes ( since 1872 ), Feilding ( England ), Forbes ( Ireland ), Leslie ( Ireland ), Fraser ( Scotland ), Lane-Fox, Meynell, Noel ( Gainsborough ), Ashton Case ( or Ashton-Case ; England ), Radcliffe ( England ), Monckton, Pakenham ( Ireland ), Pontifex ( England ), Crichton-Stuart ( Scotland ) and Strickland ( Counts of Catena, Malta ) families.

Since the 19th century, there have been attempts to identify him with the Viking prince Rurik of Russian chronicles.

Since the late 19th century, virtually the entirety of the world's inhabitable land has been parcelled up into areas with more or less definite borders claimed by various states.

Since the 19th century, Basque nationalism has demanded the right of some kind of self-determination.

Since the 19th century high level civil servants from the Dutch East Indies often spent long term leave and vacation in The Hague.

Since the late 19th century, most treaties have followed a fairly consistent format.

Since the late 19th century, zombies have acquired notable popularity, especially in North American and European folklore.

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

Since the late 19th century, artists have generally signed individual impressions from an edition and often number the impressions to form a limited edition.

Since the late 19th century some opera composers have written music to prose or free verse libretti.

Since the 19th century, much of the square dance repertoire has been derived from jigs and reels from Scotland and Ireland, sometimes in relatively unaltered form, sometimes as played in the old time music tradition or as adapted by other cultures such as that of Quebec.

Since the middle of the 19th century this form of the instrument has also been used in military and civil bands in Germany, where it is called a Stahlspiel or Militär-Glockenspiel.

Since Nuku ' alofa have been expanding from when it became the center of Christianity in Tonga in the 19th century, it became essential that it was reorganised for effective administration of the capital.