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albedo
Albedo (; ) is the fraction of sunlight that is diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident radiation). Surface albedo is defined as the ratio of radiosity Je to the irradian...
https://en.wikipedia.org/wiki/Albedo
13
alabama
Alabama () is a state in the Southeastern region of the United States, bordered by Tennessee to the north; Georgia to the east; Florida and the Gulf of Mexico to the south; and Mississippi to the west. Alabama is the 30th largest by area and the 24th-most populous of the U.S. states. Alabama is nicknamed the Yellowham...
https://en.wikipedia.org/wiki/Alabama
16
aristotle
Aristotle (; Aristotélēs, ; 384–322 BC) was an Ancient Greek philosopher and polymath. His writings cover a broad range of subjects spanning the natural sciences, philosophy, linguistics, economics, politics, psychology and the arts. As the founder of the Peripatetic school of philosophy in the Lyceum in Athens, he be...
https://en.wikipedia.org/wiki/Aristotle
20
academy_awards
The Academy Awards, mainly known as the Oscars, are awards for artistic and technical merit for the film industry. They are presented annually by the Academy of Motion Picture Arts and Sciences located in Beverly Hills, California, United States, in recognition of excellence in cinematic achievements as assessed by the...
https://en.wikipedia.org/wiki/Academy%20Awards
7
altruism
Altruism is the principle and practice of concern for the well-being and/or happiness of other humans or animals. While objects of altruistic concern vary, it is an important moral value in many cultures and religions. It may be considered a synonym of selflessness, the opposite of selfishness. The word altruism was p...
https://en.wikipedia.org/wiki/Altruism
5
algeria
Algeria, officially the People's Democratic Republic of Algeria, is a country in North Africa. Algeria is bordered to the northeast by Tunisia; to the east by Libya; to the southeast by Niger; to the southwest by Mali, Mauritania, and Western Sahara; to the west by Morocco; and to the north by the Mediterranean Sea. It...
https://en.wikipedia.org/wiki/Algeria
14
anthropology
Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, societies, and linguistics, in both the present and past, including past human species. Social anthropology studies patterns of behavior, while cultural anthropology studies cultural meaning, including norms and va...
https://en.wikipedia.org/wiki/Anthropology
16
alchemy
Alchemy (from Arabic: al-kīmiyā; from Ancient Greek: χυμεία, khumeía) is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was historically practiced in China, India, the Muslim world, and Europe. In its Western form, alchemy is first attested in a number of pseudepigraphical t...
https://en.wikipedia.org/wiki/Alchemy
10
astronomer
An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either observational (by analyzing the data) or theoretical astronomy. Examples of topics...
https://en.wikipedia.org/wiki/Astronomer
18
ascii
ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because of technical limitations of computer systems at the time it was invented, ASCII...
https://en.wikipedia.org/wiki/ASCII
16
animation
Animation is the method that encompasses myriad filmmaking techniques, by which still images are manipulated to create moving images. In traditional animation, images are drawn or painted by hand on transparent celluloid sheets (cels) to be photographed and exhibited on film. Animation has been recognized as an artisti...
https://en.wikipedia.org/wiki/Animation
10
apollo
Apollo or Apollon is one of the Olympian deities in classical Greek and Roman religion and Greek and Roman mythology. Apollo has been recognized as a god of archery, music and dance, truth and prophecy, healing and diseases, the Sun and light, poetry, and more. One of the most important and complex of the Greek gods, ...
https://en.wikipedia.org/wiki/Apollo
21
andre_agassi
Andre Kirk Agassi ( ; born April 29, 1970) is an American former world No. 1 tennis player. He is an eight-time major champion and an Olympic gold medalist, as well as a runner-up in seven other majors. Agassi is widely considered one of the greatest tennis players of all time. Agassi is the second of five men to achi...
https://en.wikipedia.org/wiki/Andre%20Agassi
7
arithmetic_mean
In mathematics and statistics, the arithmetic mean ( ), arithmetic average, or just the mean or average (when the context is clear) is the sum of a collection of numbers divided by the count of numbers in the collection. The collection is often a set of results from an experiment, an observational study, or a survey. T...
https://en.wikipedia.org/wiki/Arithmetic%20mean
15
amphibian
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. They are a paraphyletic group encompassing all tetrapods excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds, and mammals). All extant (living) amphibians belong to the subc...
https://en.wikipedia.org/wiki/Amphibian
8
alaska
Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. It borders British Columbia and Yukon in Canada to the east and it shares a western maritime border in the Bering Strait with Russia's Chukotka Autonomous Okrug. The Chukchi and Beaufort Seas of the Arctic Ocean lie to the north and ...
https://en.wikipedia.org/wiki/Alaska
7
agriculture
Agriculture encompasses crop and livestock production, aquaculture, fisheries and forestry for food and non-food products. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled people to live in cities. While humans s...
https://en.wikipedia.org/wiki/Agriculture
17
analysis_of_variance
Analysis of variance (ANOVA) is a collection of statistical models and their associated estimation procedures (such as the "variation" among and between groups) used to analyze the differences among means. ANOVA was developed by the statistician Ronald Fisher. ANOVA is based on the law of total variance, where the obse...
https://en.wikipedia.org/wiki/Analysis%20of%20variance
26
alkane
In organic chemistry, an alkane, or paraffin (a historical trivial name that also has other meanings), is an acyclic saturated hydrocarbon. In other words, an alkane consists of hydrogen and carbon atoms arranged in a tree structure in which all the carbon–carbon bonds are single. Alkanes have the general chemical form...
https://en.wikipedia.org/wiki/Alkane
7
assistive_technology
Assistive technology (AT) is a term for assistive, adaptive, and rehabilitative devices for people with disabilities and the elderly. Disabled people often have difficulty performing activities of daily living (ADLs) independently, or even with assistance. ADLs are self-care activities that include toileting, mobility ...
https://en.wikipedia.org/wiki/Assistive%20technology
14
acid
An acid is a molecule or ion capable of either donating a proton (i.e. hydrogen ion, H+), known as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid. The first category of acids are the proton donors, or Brønsted–Lowry acids. In the special case of aqueous solutions, proton...
https://en.wikipedia.org/wiki/Acid
8
bitumen
Bitumen (, ) is an immensely viscous constituent of petroleum. Depending on its exact composition it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In the U.S., the material is commonly referred to as asphalt. Whether found in natural deposits or refined ...
https://en.wikipedia.org/wiki/Bitumen
10
american_national_standards_institute
The American National Standards Institute (ANSI ) is a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States. The organization also coordinates U.S. standards with international standards so that Amer...
https://en.wikipedia.org/wiki/American%20National%20Standards%20Institute
6
apollo_11
Apollo 11 (July 16–24, 1969) was the American spaceflight that first landed humans on the Moon. Commander Neil Armstrong and Lunar Module Pilot Buzz Aldrin landed the Apollo Lunar Module Eagle on July 20, 1969, at 20:17 UTC, and Armstrong became the first person to step onto the Moon's surface six hours and 39 minutes ...
https://en.wikipedia.org/wiki/Apollo%2011
16
apollo_8
Apollo 8 (December 21–27, 1968) was the first crewed spacecraft to leave low Earth orbit and the first human spaceflight to reach the Moon. The crew orbited the Moon ten times without landing, and then departed safely back to Earth. These three astronauts—Frank Borman, James Lovell, and William Anders—were the first hu...
https://en.wikipedia.org/wiki/Apollo%208
11
anatomy
Anatomy () is the branch of biology concerned with the study of the structure of organisms and their parts. Anatomy is a branch of natural science that deals with the structural organization of living things. It is an old science, having its beginnings in prehistoric times. Anatomy is inherently tied to developmental b...
https://en.wikipedia.org/wiki/Anatomy
11
ambiguity
Ambiguity is the type of meaning in which a phrase, statement, or resolution is not explicitly defined, making several interpretations plausible. A common aspect of ambiguity is uncertainty. It is thus an attribute of any idea or statement whose intended meaning cannot be definitively resolved, according to a rule or p...
https://en.wikipedia.org/wiki/Ambiguity
15
asia
Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometers, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which has long been home to the majority of the human population, was the site of man...
https://en.wikipedia.org/wiki/Asia
5
aruba
Aruba ( , or , ), officially the Country of Aruba (; ), is a constituent country of the Kingdom of the Netherlands physically located in the mid-south of the Caribbean Sea, about north of the Venezuelan peninsula of Paraguaná and northwest of Curaçao. It measures long from its northwestern to its southeastern end ...
https://en.wikipedia.org/wiki/Aruba
6
angola
Angola ( ; ; , ), officially the Republic of Angola (), is a country on the west-central coast of Southern Africa. It is the second-largest Lusophone (Portuguese-speaking) country in both total area and population (behind Brazil in both cases), and is the seventh-largest country in Africa. It is bordered by Namibia to ...
https://en.wikipedia.org/wiki/Angola
13
demographics_of_angola
Demographic features of the population of Angola include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects. According to 2014 census data, Angola had a population of 25,789,024 inhabitants in 2014. Ethnically, there are three main groups, ...
https://en.wikipedia.org/wiki/Demographics%20of%20Angola
7
android_robot
An android is a humanoid robot or other artificial being often made from a flesh-like material. Historically, androids were completely within the domain of science fiction and frequently seen in film and television, but advances in robot technology now allow the design of functional and realistic humanoid robots. Term...
https://en.wikipedia.org/wiki/Android%20%28robot%29
14
albert_einstein
Albert Einstein ( ; ; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist who is widely held to be one of the greatest and most influential scientists of all time. Best known for developing the theory of relativity, Einstein also made important contributions to quantum mechanics, and was thus a centr...
https://en.wikipedia.org/wiki/Albert%20Einstein
99
afghanistan
Afghanistan, officially the Islamic Emirate of Afghanistan, is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordered by Pakistan to the east and south, Iran to the west, Turkmenistan to the northwest, Uzbekistan to the north, Tajikistan to the no...
https://en.wikipedia.org/wiki/Afghanistan
9
albania
Albania ( ; or ), officially the Republic of Albania (), is a country in Southeast Europe. The country is located in the Balkans on the Adriatic and Ionian Seas within the Mediterranean Sea and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the ...
https://en.wikipedia.org/wiki/Albania
15
azerbaijan
Azerbaijan (, ; , ), officially the Republic of Azerbaijan, is a transcontinental country located at the boundary of Eastern Europe and West Asia. It is a part of the South Caucasus region and is bounded by the Caspian Sea to the east, Russia (Republic of Dagestan) to the north, Georgia to the northwest, Armenia and Tu...
https://en.wikipedia.org/wiki/Azerbaijan
7
amateur_astronomy
Amateur astronomy is a hobby where participants enjoy observing or imaging celestial objects in the sky using the unaided eye, binoculars, or telescopes. Even though scientific research may not be their primary goal, some amateur astronomers make contributions in doing citizen science, such as by monitoring variable st...
https://en.wikipedia.org/wiki/Amateur%20astronomy
30
art
Art is a diverse range of human activity, and its resulting product, that involves creative or imaginative talent expressive of technical proficiency, beauty, emotional power, or conceptual ideas. There is no generally agreed definition of what constitutes art, and its interpretation has varied greatly throughout hist...
https://en.wikipedia.org/wiki/Art
5
algorithm
In mathematics and computer science, an algorithm () is a finite sequence of rigorous instructions, typically used to solve a class of specific problems or to perform a computation. Algorithms are used as specifications for performing calculations and data processing. More advanced algorithms can use conditionals to di...
https://en.wikipedia.org/wiki/Algorithm
214
atlas_disambiguation
An atlas is a collection of maps. Atlas may also refer to: Mythology Atlas (mythology), an Ancient Greek Titanic deity Atlas, the first legendary king of Atlantis Atlas of Mauretania, a legendary king Places United States Atlas, California Atlas, Illinois Atlas, Texas Atlas, West Virginia Atlas, Wisconsin ...
https://en.wikipedia.org/wiki/Atlas%20%28disambiguation%29
13
asteroids_video_game
Asteroids is a space-themed multidirectional shooter arcade video game designed by Lyle Rains and Ed Logg released in November 1979 by Atari, Inc. The player controls a single spaceship in an asteroid field which is periodically traversed by flying saucers. The object of the game is to shoot and destroy the asteroids a...
https://en.wikipedia.org/wiki/Asteroids%20%28video%20game%29
12
aquarius_constellation
Aquarius is an equatorial constellation of the zodiac, between Capricornus and Pisces. Its name is Latin for "water-carrier" or "cup-carrier", and its old astronomical symbol is (♒︎), a representation of water. Aquarius is one of the oldest of the recognized constellations along the zodiac (the Sun's apparent path). I...
https://en.wikipedia.org/wiki/Aquarius%20%28constellation%29
6
anime
is hand-drawn and computer-generated animation originating from Japan. Outside Japan and in English, anime refers specifically to animation produced in Japan. However, in Japan and in Japanese, (a term derived from a shortening of the English word animation) describes all animated works, regardless of style or origin....
https://en.wikipedia.org/wiki/Anime
8
amsterdam
Amsterdam ( , , ; literally, "The Dam on the River Amstel") is the capital and most populated city of the Netherlands, with The Hague being the seat of government. It has a population of 921,402 within the city proper, 1,457,018 in the urban area and 2,480,394 in the metropolitan area. Located in the Dutch province of...
https://en.wikipedia.org/wiki/Amsterdam
13
audi
Audi AG () is a German automotive manufacturer of luxury vehicles headquartered in Ingolstadt, Bavaria, Germany. A subsidiary of the Volkswagen Group, Audi produces vehicles in nine production facilities worldwide. The origins of the company are complex, dating back to the early 20th century and the initial enterprise...
https://en.wikipedia.org/wiki/Audi
23
apple_inc
Apple Inc. is an American multinational technology company headquartered in Cupertino, California. , Apple is the world's biggest company by market capitalization, and with the largest technology company by 2022 revenue. , Apple is the fourth-largest personal computer vendor by unit sales; the largest manufacturing co...
https://en.wikipedia.org/wiki/Apple%20Inc.
68
american_civil_war
The American Civil War (April 12, 1861 – May 26, 1865; also known by other names) was a civil war in the United States between the Union ("the North") and the Confederacy ("the South"), formed by states that had seceded from the Union. The cause of the war was the dispute over whether slavery would be permitted to expa...
https://en.wikipedia.org/wiki/American%20Civil%20War
5
akira_kurosawa
was a Japanese filmmaker and painter who directed 30 films in a career spanning over five decades. He is widely regarded as one of the greatest and most influential filmmakers in the history of cinema. Kurosawa displayed a bold, dynamic style, strongly influenced by Western cinema yet distinct from it; he was involved ...
https://en.wikipedia.org/wiki/Akira%20Kurosawa
6
ancient_egypt
Ancient Egypt was a civilization in Northeast Africa situated in the Nile Valley. Ancient Egyptian civilization followed prehistoric Egypt and coalesced around 3100BC (according to conventional Egyptian chronology) with the political unification of Upper and Lower Egypt under Menes (often identified with Narmer). The h...
https://en.wikipedia.org/wiki/Ancient%20Egypt
6
abba
ABBA ( , ; formerly named Björn & Benny, Agnetha & Anni-Frid or Björn & Benny, Agnetha & Frida) are a Swedish pop supergroup formed in Stockholm in 1972 by Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. The group's name is an acronym of the first letters of their first names arranged as a pa...
https://en.wikipedia.org/wiki/ABBA
6
messagepad
The MessagePad is a discontinued series of personal digital assistant devices developed by Apple Computer for the Newton platform in 1993. Some electronic engineering and the manufacture of Apple's MessagePad devices was undertaken in Japan by Sharp. The devices are based on the ARM 610 RISC processor and all featured...
https://en.wikipedia.org/wiki/MessagePad
7
arsenic
Arsenic is a chemical element with the symbol As and atomic number 33. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Arsenic is a metalloid. It has various allotropes, but only the grey form, which has a metallic appearance, is important to industr...
https://en.wikipedia.org/wiki/Arsenic
6
aluminium
Aluminium (aluminum in North American English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals; about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air. Al...
https://en.wikipedia.org/wiki/Aluminium
8
andrey_markov
Andrey Andreyevich Markov (14 June 1856 – 20 July 1922) was a Russian mathematician best known for his work on stochastic processes. A primary subject of his research later became known as the Markov chain. He was also a strong, close to master-level chess player. Markov and his younger brother Vladimir Andreevich Mar...
https://en.wikipedia.org/wiki/Andrey%20Markov
18
antigua_and_barbuda
Antigua and Barbuda (, ) is a sovereign island country in the Caribbean. It lies at the conjuncture of the Caribbean Sea and the Atlantic Ocean in the Leeward Islands part of the Lesser Antilles. The country consists of two major islands, Antigua and Barbuda, which are approximately apart, and several smaller islands...
https://en.wikipedia.org/wiki/Antigua%20and%20Barbuda
5
albert_speer
Berthold Konrad Hermann Albert Speer (; ; 19 March 1905 – 1 September 1981) was a German architect who served as the Minister of Armaments and War Production in Nazi Germany during most of World War II. A close ally of Adolf Hitler, he was convicted at the Nuremberg trial and sentenced to 20 years in prison. An archit...
https://en.wikipedia.org/wiki/Albert%20Speer
5
ada_lovelace
Augusta Ada King, Countess of Lovelace (née Byron; 10 December 1815 – 27 November 1852) was an English mathematician and writer, chiefly known for her work on Charles Babbage's proposed mechanical general-purpose computer, the Analytical Engine. She was the first to recognise that the machine had applications beyond pu...
https://en.wikipedia.org/wiki/Ada%20Lovelace
14
alps
The Alps () are the highest and most extensive mountain range that is entirely in Europe, stretching approximately across eight Alpine countries (from west to east): Monaco, France, Switzerland, Italy, Liechtenstein, Germany, Austria and Slovenia. The Alpine arch extends from Nice on the western Mediterranean to Trie...
https://en.wikipedia.org/wiki/Alps
11
absolute_value
In mathematics, the absolute value or modulus of a real number , is the non-negative value without regard to its sign. Namely, if is a positive number, and if is negative (in which case negating makes positive), and For example, the absolute value of 3 and the absolute value of −3 is The absolute value of a ...
https://en.wikipedia.org/wiki/Absolute%20value
15
auto_racing
Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. Auto racing has existed since the invention of the automobile. Races of various sorts were organised, with the first recorded as early as 1867. Many of the earliest events wer...
https://en.wikipedia.org/wiki/Auto%20racing
10
aarhus
Aarhus (, , ; officially spelled Århus from 1948 until 1 January 2011) is the second-largest city in Denmark and the seat of Aarhus Municipality. It is located on the eastern shore of Jutland in the Kattegat sea and approximately northwest of Copenhagen. Dating back to the late 8th century, Aarhus was founded as a ha...
https://en.wikipedia.org/wiki/Aarhus
10
algorithms_for_calculating_variance
Algorithms for calculating variance play a major role in computational statistics. A key difficulty in the design of good algorithms for this problem is that formulas for the variance may involve sums of squares, which can lead to numerical instability as well as to arithmetic overflow when dealing with large values. ...
https://en.wikipedia.org/wiki/Algorithms%20for%20calculating%20variance
55
economy_of_azerbaijan
The economy of Azerbaijan has completed its post-Soviet transition into a major oil-based economy (with the completion of the Baku-Tbilisi-Ceyhan Pipeline), from one where the state played the major role. The transition to oil production led to remarkable growth figures as projects came online; reaching 26.4% in 2005 (...
https://en.wikipedia.org/wiki/Economy%20of%20Azerbaijan
6
economy_of_armenia
The economy of Armenia grew by 12.6% in 2022, according to the country's Statistical Committee and the International Monetary Fund. Total output amounted to 8.5 trillion Armenian drams, or $19.5 billion. At the same time, Armenia's foreign trade turnover significantly accelerated in growth from 17.7% in 2021 to 68.6% i...
https://en.wikipedia.org/wiki/Economy%20of%20Armenia
17
demographics_of_american_samoa
Demographics of American Samoa include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects. American Samoa is an unincorporated territory of the United States located in the South Pacific Ocean. Vital statistics Births and deaths Structure ...
https://en.wikipedia.org/wiki/Demographics%20of%20American%20Samoa
5
avicenna
Ibn Sina (; 980 – June 1037 CE), commonly known in the West as Avicenna (), was the preeminent philosopher and physician of the Muslim world, flourishing during the Islamic Golden Age, serving in the courts of various Iranian rulers. He is often described as the father of early modern medicine. His philosophy was of th...
https://en.wikipedia.org/wiki/Avicenna
12
the_ashes
The Men's Ashes is a Test cricket series played biennially between England and Australia. The term originated in a satirical obituary published in a British newspaper, The Sporting Times, immediately after Australia's 1882 victory at The Oval, its first Test win on English soil. The obituary stated that English cricket...
https://en.wikipedia.org/wiki/The%20Ashes
5
analysis
Analysis (: analyses) is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (384–322 B.C.), though analysis as a formal concept is a relatively recent developme...
https://en.wikipedia.org/wiki/Analysis
19
amplitude_modulation
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts ...
https://en.wikipedia.org/wiki/Amplitude%20modulation
9
augustin_jean_fresnel
Augustin-Jean Fresnel (10 May 1788 – 14 July 1827) was a French civil engineer and physicist whose research in optics led to the almost unanimous acceptance of the wave theory of light, excluding any remnant of Newton's corpuscular theory, from the late 1830s until the end of the 19th century. He is perhaps better know...
https://en.wikipedia.org/wiki/Augustin-Jean%20Fresnel
31
assembly_line
An assembly line is a manufacturing process (often called a progressive assembly) in which parts (usually interchangeable parts) are added as the semi-finished assembly moves from workstation to workstation where the parts are added in sequence until the final assembly is produced. By mechanically moving the parts to t...
https://en.wikipedia.org/wiki/Assembly%20line
13
adelaide
Adelaide ( ; ) is the capital city of South Australia, the state's largest city and the fifth-most populous city in Australia. "Adelaide" may refer to either Greater Adelaide (including the Adelaide Hills) or the Adelaide city centre. The demonym Adelaidean is used to denote the city and the residents of Adelaide. The...
https://en.wikipedia.org/wiki/Adelaide
28
automorphism
In mathematics, an automorphism is an isomorphism from a mathematical object to itself. It is, in some sense, a symmetry of the object, and a way of mapping the object to itself while preserving all of its structure. The set of all automorphisms of an object forms a group, called the automorphism group. It is, loosely ...
https://en.wikipedia.org/wiki/Automorphism
9
artificial_intelligence
Artificial intelligence (AI) is the intelligence of machines or software, as opposed to the intelligence of humans or animals. It is also the field of study in computer science that develops and studies intelligent machines. "AI" may also refer to the machines themselves. AI technology is widely used throughout indust...
https://en.wikipedia.org/wiki/Artificial%20intelligence
131
anaximander
Anaximander ( ; Anaximandros; ) was a pre-Socratic Greek philosopher who lived in Miletus, a city of Ionia (in modern-day Turkey). He belonged to the Milesian school and learned the teachings of his master Thales. He succeeded Thales and became the second master of that school where he counted Anaximenes and, arguably...
https://en.wikipedia.org/wiki/Anaximander
11
apl
APL is an abbreviation, acronym, or initialism that may refer to: Science and technology 132524 APL, an asteroid Abductor pollicis longus muscle, in the human hand Acute promyelocytic leukemia, a subtype of acute myelogenous leukemia Applied Physics Letters, a physics journal Nampula Airport (IATA airport code: APL),...
https://en.wikipedia.org/wiki/APL
7
architect
An architect is a person who plans, designs and oversees the construction of buildings. To practice architecture means to provide services in connection with the design of buildings and the space within the site surrounding the buildings that have human occupancy or use as their principal purpose. Etymologically, the t...
https://en.wikipedia.org/wiki/Architect
10
afterlife
The afterlife or life after death is a purported existence in which the essential part of an individual's stream of consciousness or identity continues to exist after the death of their physical body. The surviving essential aspect varies between belief systems; it may be some partial element, or the entire soul or spi...
https://en.wikipedia.org/wiki/Afterlife
16
astrometry
Astrometry is a branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. It provides the kinematics and physical origin of the Solar System and this galaxy, the Milky Way. History The history of astrometry is linked to the history of star catalogues, w...
https://en.wikipedia.org/wiki/Astrometry
8
alloy
An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of a metal in the resulting material, such as electrical conductivity, ductility, opacity, and luster, but may have properties that differ from those of the...
https://en.wikipedia.org/wiki/Alloy
9
acoustics
Acoustics is a branch of physics that deals with the study of mechanical waves in gases, liquids, and solids including topics such as vibration, sound, ultrasound and infrasound. A scientist who works in the field of acoustics is an acoustician while someone working in the field of acoustics technology may be called an...
https://en.wikipedia.org/wiki/Acoustics
14
atomic_physics
Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. Atomic physics typically refers to the study of atomic structure and the interaction between atoms. It is primarily concerned with the way in which electrons are arranged around the nucleus and the proces...
https://en.wikipedia.org/wiki/Atomic%20physics
7
applet
In computing, an applet is any small application that performs one specific task that runs within the scope of a dedicated widget engine or a larger program, often as a plug-in. The term is frequently used to refer to a Java applet, a program written in the Java programming language that is designed to be placed on a w...
https://en.wikipedia.org/wiki/Applet
22
atomic_orbital
In atomic theory and quantum mechanics, an atomic orbital () is a function describing the location and wave-like behavior of an electron in an atom. This function can be used to calculate the probability of finding any electron of an atom in any specific region around the atom's nucleus. The term atomic orbital may als...
https://en.wikipedia.org/wiki/Atomic%20orbital
32
alan_turing
Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher and theoretical biologist. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation w...
https://en.wikipedia.org/wiki/Alan%20Turing
22
area
Area is the measure of a region's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness th...
https://en.wikipedia.org/wiki/Area
24
athens
Athens ( ; , ; , ) is a major coastal urban area in the Mediterranean, and it is both the capital and the largest city of Greece. With its urban area's population numbering over three million, it is also the eighth largest urban area in the European Union. Athens dominates and is the capital of the Attica region and is...
https://en.wikipedia.org/wiki/Athens
15
anguilla
Anguilla ( ) is a British Overseas Territory in the Caribbean. It is one of the most northerly of the Leeward Islands in the Lesser Antilles, lying east of Puerto Rico and the Virgin Islands and directly north of Saint Martin. The territory consists of the main island of Anguilla, approximately long by wide at its wi...
https://en.wikipedia.org/wiki/Anguilla
6
acoustic_theory
Acoustic theory is a scientific field that relates to the description of sound waves. It derives from fluid dynamics. See acoustics for the engineering approach. For sound waves of any magnitude of a disturbance in velocity, pressure, and density we have In the case that the fluctuations in velocity, density, and p...
https://en.wikipedia.org/wiki/Acoustic%20theory
5
ada_programming_language
Ada is a structured, statically typed, imperative, and object-oriented high-level programming language, inspired by Pascal and other languages. It has built-in language support for design by contract (DbC), extremely strong typing, explicit concurrency, tasks, synchronous message passing, protected objects, and non-det...
https://en.wikipedia.org/wiki/Ada%20%28programming%20language%29
62
advanced_encryption_standard
The Advanced Encryption Standard (AES), also known by its original name Rijndael (), is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001. AES is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joa...
https://en.wikipedia.org/wiki/Advanced%20Encryption%20Standard
127
anisotropy
Anisotropy () is the structural property of non-uniformity in different directions, as opposed to isotropy. An anisotropic object or pattern has properties that differ according to direction of measurement. For example, many materials exhibit very different properties when measured along different axes: physical or mec...
https://en.wikipedia.org/wiki/Anisotropy
22
alpha_decay
Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two. An alpha particle is identical to the nucl...
https://en.wikipedia.org/wiki/Alpha%20decay
8
ames_iowa
Ames () is a city in Story County, Iowa, United States, located approximately north of Des Moines in central Iowa. It is best known as the home of Iowa State University (ISU), with leading agriculture, design, engineering, and veterinary medicine colleges. A United States Department of Energy national laboratory, Ames...
https://en.wikipedia.org/wiki/Ames%2C%20Iowa
11
almost_all
In mathematics, the term "almost all" means "all but a negligible quantity". More precisely, if is a set, "almost all elements of " means "all elements of but those in a negligible subset of ". The meaning of "negligible" depends on the mathematical context; for instance, it can mean finite, countable, or null. In c...
https://en.wikipedia.org/wiki/Almost%20all
15
antimatter
In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time, known as CPT reversal. Antimatter occurs in natural processes like cosmic ray collisions and some ...
https://en.wikipedia.org/wiki/Antimatter
6
casa_batllo
() is a building in the center of Barcelona, Spain. It was designed by Antoni Gaudí, and is considered one of his masterpieces. A remodel of a previously built house, it was redesigned in 1904 by Gaudí and has been refurbished several times after that. Gaudí's assistants Domènec Sugrañes i Gras, Josep Canaleta and Joan...
https://en.wikipedia.org/wiki/Casa%20Batll%C3%B3
6
antiparticle
In particle physics, every type of particle is associated with an antiparticle with the same mass but with opposite physical charges (such as electric charge). For example, the antiparticle of the electron is the positron (also known as an antielectron). While the electron has a negative electric charge, the positron h...
https://en.wikipedia.org/wiki/Antiparticle
10
americans_with_disabilities_act_of_1990
The Americans with Disabilities Act of 1990 or ADA () is a civil rights law that prohibits discrimination based on disability. It affords similar protections against discrimination to Americans with disabilities as the Civil Rights Act of 1964, which made discrimination based on race, religion, sex, national origin, an...
https://en.wikipedia.org/wiki/Americans%20with%20Disabilities%20Act%20of%201990
15
apple_i
The Apple Computer 1 (Apple-1), later known predominantly as the Apple I, is an 8-bit motherboard-only personal computer designed by Steve Wozniak and released by the Apple Computer Company (now Apple Inc.) in 1976. The company was initially formed to sell the Apple Iits first product and would later become the world's...
https://en.wikipedia.org/wiki/Apple%20I
9