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 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 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 medieval times monarchs of England and the United Kingdom had ministers in whom they placed special trust and who were regarded as the head of the government.

Since his predecessor Meinfried had already accepted Christianity, it followed that Pribislav had already been baptized in childhood, in contrast to the ideas of medieval chroniclers that the prince had first been baptized as an adult.

Since a medieval spear required only a small amount of steel along the sharpened edges ( most of the spear-tip was wrought iron ), it was an economical weapon.

Since medieval times, Thessaloniki was hit by strong earthquakes, notably in 1759, 1902, 1978 and 1995.

Since there are rarely any visible remains of these settlements, they are not generally considered ghost towns ; instead, they are referred to in archaeological circles as deserted medieval villages.

Since bacteria were unknown in medieval times, illnesses are evil spirits, which come under Vim.

Since most of these usages do not exist anymore, Voragine serves as a valuable source for the study of medieval Marian customs.

Since 1984 Harlaxton Manor has also been the site of the annual Harlaxton Symposium, an interdisciplinary symposium on medieval art, literature, and architecture.

Since at least medieval times there have been hinges to draw bridges for defensive purposes for fortified buildings.

Since the fall of the last of the medieval Serbian states in 1459, the Turks often assaulted the monastery.

Since medieval times it has been part of the Manor of Groby.

Since some medieval writers reckoned the end of the year in September, it is possible that the year referred to is in fact the one we know as 999.

Since medieval times, monarchs have frequently, but not always, chosen to use a name different from their own usual personal name when they inherit a throne.

Since medieval times the measure barrel has been used with different meanings around Europe, from about 100 litres to above 1000 in special cases.

Since the popularization of Sōtō Zen in medieval Japan, Sōtō Zen funeral practices have been a significant point of contact between the monks and laity, and continue to play an important role in lay religious life today.

Since the Achilleis survives in fragments, its text is comparatively more fluid than that of ancient texts with medieval manuscript traditions.

Since the tenth-century renaissance when it was constructed, medieval society had evolved considerably.

Since 1922, the sessions of the Riigikogu have taken place in the Toompea castle, where a new building in the exquisite expressionist and in an unusually modern style was erected to the former courtyard of the medieval castle in 1920 – 1922.

Since all other linguistic terms for broadswords are used to describe a two-handed ( or hand-and-a-half ) type sword, the broadsword's meaning in the late medieval and early Renaissance context should also be that of a two-handed sword.

Since the medieval period the Catholic Church had always been important to the Spanish economy.

Since a barn was built on top of this, the architecture also seeks to both highlight the original medieval structure and the more recent farm buildings.