Mechanism (biology)In the science of biology, a mechanism is a system of causally interacting parts and processes that produce one or more effects. Scientists explain phenomena by describing mechanisms that could produce the phenomena. For example, natural selection is a mechanism of biological evolution; other mechanisms of evolution include genetic drift, mutation, and gene flow. In ecology, mechanisms such as predation and host-parasite interactions produce change in ecological systems.
Tertiary sourceA tertiary source is an index or textual consolidation of already published primary and secondary sources that does not provide additional interpretations or analysis of the sources. Some tertiary sources can be used as an aid to find key (seminal) sources, key terms, general common knowledge and established mainstream science on a topic. The exact definition of tertiary varies by academic field. Academic research standards generally do not accept tertiary sources such as encyclopedias as citations, although survey articles are frequently cited rather than the original publication.
EmpireAn empire is a political unit made up of several territories and peoples, "usually created by conquest, and divided between a dominant center and subordinate peripheries". The center of the empire (sometimes referred to as the metropole) exercises political control over the peripheries. Within an empire, different populations have different sets of rights and are governed differently.
Experimental cancer treatmentExperimental cancer treatments are mainstream medical therapies intended to treat cancer by improving on, supplementing or replacing conventional methods (surgery, chemotherapy, radiation, and immunotherapy). However, researchers are still trying to determine whether these treatments are safe and effective treatments. Experimental cancer treatments are normally available only to people who participate in formal research programs, which are called clinical trials.
EdoEdo (), also romanized as Jedo, Yedo or Yeddo, is the former name of Tokyo. Edo, formerly a jōkamachi (castle town) centered on Edo Castle located in Musashi Province, became the de facto capital of Japan from 1603 as the seat of the Tokugawa shogunate. Edo grew to become one of the largest cities in the world under the Tokugawa. After the Meiji Restoration in 1868 the Meiji government renamed Edo as Tokyo (, "Eastern Capital") and relocated the Emperor from the historic capital of Kyoto to the city.
Aristotelian physicsAristotelian physics is the form of natural science or natural philosophy described in the works of the Greek philosopher Aristotle (384–322 BC). In his work Physics, Aristotle intended to establish general principles of change that govern all natural bodies, both living and inanimate, celestial and terrestrial including all motion (change with respect to place), quantitative change (change with respect to size or number), qualitative change, and substantial change ("coming to be" [coming into existence, 'generation'] or "passing away" [no longer existing, 'corruption']).
Urban revolutionIn anthropology and archaeology, the urban revolution is the process by which small, kin-based, illiterate agricultural villages were transformed into large, socially complex, urban societies. Australian archaeologist V. Gordon Childe introduced the term "urban revolution" in the 1930s. Childe also coined the term "Neolithic Revolution" to describe the earlier process by which hunter-gatherer societies domesticated crops and animals and began a farming lifestyle.
Migration PeriodThe Migration Period, also known as the Barbarian Invasions, was a period in European history marked by large-scale migrations that saw the fall of the Western Roman Empire and subsequent settlement of its former territories by various tribes, and the establishment of the post-Roman kingdoms. The term refers to the important role played by the migration, invasion, and settlement of various tribes, notably the Franks, Goths, Alemanni, Alans, Huns, early Slavs, Pannonian Avars, Magyars, and Bulgars within or into the former Western Empire and Eastern Europe.
Pre-Raphaelite BrotherhoodThe Pre-Raphaelite Brotherhood (later known as the Pre-Raphaelites and sometimes abbreviated as PRB) was a group of English painters, poets, and art critics, founded in 1848 by William Holman Hunt, John Everett Millais, Dante Gabriel Rossetti, William Michael Rossetti, James Collinson, Frederic George Stephens and Thomas Woolner who formed a seven-member "Brotherhood" modelled in part on the Nazarene movement. The Brotherhood was only ever a loose association and their principles were shared by other artists of the time, including Ford Madox Brown, Arthur Hughes and Marie Spartali Stillman.
MiniaturizationMiniaturization (Br.Eng.: Miniaturisation) is the trend to manufacture ever smaller mechanical, optical and electronic products and devices. Examples include miniaturization of mobile phones, computers and vehicle engine downsizing. In electronics, the exponential scaling and miniaturization of silicon MOSFETs (MOS transistors) leads to the number of transistors on an integrated circuit chip doubling every two years, an observation known as Moore's law.
SymposiumIn Ancient Greece, the symposium (συμπόσιον sympósion or symposio, from συμπίνειν sympínein, "to drink together") was a part of a banquet that took place after the meal, when drinking for pleasure was accompanied by music, dancing, recitals, or conversation. Literary works that describe or take place at a symposium include two Socratic dialogues, Plato's Symposium and Xenophon's Symposium, as well as a number of Greek poems such as the elegies of Theognis of Megara. Symposia are depicted in Greek and Etruscan art that shows similar scenes.
Western BlocThe Western Bloc, also known as the Capitalist Bloc, is an informal, collective term for countries that were officially allied with the United States during the Cold War of 1947–1991. While the NATO member states, in Western Europe and Northern America, were pivotal to the bloc, it included many other countries, in the broader Asia-Pacific region, the Middle East, Latin America, and Africa with histories of anti-Soviet, anti-communist and, in some cases anti-socialist, ideologies and policies.
Roman artThe art of Ancient Rome, and the territories of its Republic and later Empire, includes architecture, painting, sculpture and mosaic work. Luxury objects in metal-work, gem engraving, ivory carvings, and glass are sometimes considered to be minor forms of Roman art, although they were not considered as such at the time. Sculpture was perhaps considered as the highest form of art by Romans, but figure painting was also highly regarded.
Field hockeyField hockey (or simply hockey) is a team sport structured in standard hockey format, in which each team plays with eleven players in total, made up of ten outfield players and a goalkeeper. Teams must move a hockey ball around a pitch by hitting it with a hockey stick towards the rival team's shooting circle and then into the goal. The match is won by the team that scores the most goals. Matches are played on grass, watered turf, artificial turf, synthetic field, or indoor boarded surface.
History of printingThe history of printing starts as early as 3000 BC, when the proto-Elamite and Sumerian civilizations used cylinder seals to certify documents written in clay tablets. Other early forms include block seals, hammered coinage, pottery imprints, and cloth printing. Initially a method of printing patterns on cloth such as silk, woodblock printing for texts on paper originated in China by the 7th century during the Tang dynasty, leading to the spread of book production and woodblock printing in other parts of Asia such as Korea and Japan.
French RevolutionThe French Revolution (Révolution française ʁevɔlysjɔ̃ fʁɑ̃sɛːz) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are considered fundamental principles of liberal democracy, while the values and institutions it created remain central to French political discourse. Its causes are generally agreed to be a combination of social, political and economic factors, which the Ancien Régime proved unable to manage.
FalsifiabilityFalsifiability is a deductive standard of evaluation of scientific theories and hypotheses, introduced by the philosopher of science Karl Popper in his book The Logic of Scientific Discovery (1934). A theory or hypothesis is falsifiable (or refutable) if it can be logically contradicted by an empirical test. Popper proposed falsifiability as the cornerstone solution to both the problem of induction and the problem of demarcation.
FeudalismFeudalism, also known as the feudal system, was the combination of the legal, economic, military, cultural and political customs that flourished in medieval Europe between the 9th and 15th centuries. Broadly defined, it was a way of structuring society around relationships that were derived from the holding of land in exchange for service or labour. Although it is derived from the Latin word feodum or feudum (fief), which was used during the Medieval period, the term feudalism and the system which it describes were not conceived of as a formal political system by the people who lived during the Middle Ages.
FlorenceFlorence (ˈflɒrəns ; Firenze fiˈrɛntse) is the capital city of the region of Tuscany in Central Italy. It is also the most populated city in Tuscany, with 360,930 inhabitants in 2023, and 984,991 in its metropolitan area. Florence was a centre of medieval European trade and finance and one of the wealthiest cities of that era. It is considered by many academics to have been the birthplace of the Renaissance, becoming a major artistic, cultural, commercial, political, economic and financial center.
Technological evolutionThe term "technological evolution" captures explanations of technological change that draw on mechanisms from evolutionary biology. Evolutionary biology has one of its roots in the book “On the origin of species” by Charles Darwin. In the style of this catchphrase, technological evolution might describe the origin of new technologies. The combinatoric theory of technological change states that every technology always consists of simpler technologies and a new technology is made of already existing technologies.
