42,772 articles
Ijen
Ijen, in Indonesian Gunung Ijen, is a volcanic complex in eastern Java, Indonesia, known for its turquoise acid crater lake, blue sulfur flames, and sulfur mining.
IK Pegasi
IK Pegasi (HR 8210) is a close binary star system in Pegasus, about 150 light years from the Sun, the nearest known future Type Ia supernova progenitor.
IK Tau
IK Tau, also cataloged as NML Tau, is an oxygen-rich Mira variable star in the constellation Taurus, an asymptotic giant branch star pulsating over about 470 days.
IKKT matrix model
The IKKT matrix model, also called the type IIB matrix model, is a zero-dimensional matrix model proposed in 1996 as a nonperturbative definition of type IIB superstring theory.
Ikuei Moritani
Ikuei Moritani, also recorded as Ichiro Moritani, was a chemist who with Yuzo Fujiwara observed in 1967 the palladium-catalyzed reaction of benzene with olefins now called the Fujiwara–Moritani reaction.
Ikuo Kushiro
Ikuo Kushiro (久城 育夫, born 1934) is a Japanese experimental petrologist whose high-pressure experiments established how mantle peridotite melts to form basalt and andesite magmas.
IL Lupi
IL Lupi, also written IL Lup, is the variable-star designation of 4U 1543−47, a transient black hole X-ray binary in Lupus about 7.5 kiloparsecs from the Sun.
Il Nuovo Cimento
Il Nuovo Cimento is an Italian physics journal founded in Pisa in 1855 by Carlo Matteucci and Raffaele Piria, and the official organ of the Italian Physical Society.
Il´ja M. Frank
Il´ja M. Frank, also known as Il´ja Mikhailovich Frank, was a Soviet physicist who shared the 1958 Nobel Prize in Physics for explaining the Cherenkov effect.
Ilan Marek
Ilan Marek (אילן מרק, born 1963 in Haifa) is a Franco-Israeli chemist at the Technion known for copper-mediated carbometalation and carbon–hydrogen bond activation, elected to the French Academy of Sciences in 2017.
Ildar Ibragimov
Ildar Ibragimov (Ильдар Абдуллович Ибрагимов, born 1932) is a Russian mathematician in probability theory, known for Ibragimov mixing, the martingale central limit theorem, and asymptotic estimation theory.
ILIMA/LAND at FRS
ILIMA/LAND at FRS refers to two experimental programs at GSI in Darmstadt: ILIMA, measuring masses and lifetimes of exotic nuclei in storage rings, and the ALADIN-LAND reaction setup.
Ilissa B Ocko
Ilissa B. Ocko is an American climate scientist studying methane and other short-lived climate pollutants, a Senior Climate Scientist at Spark Climate Solutions and an IPCC AR7 Lead Author.
Illinois Basin
The Illinois Basin, also called the Eastern Interior Basin, is a large oval structural depression under parts of Illinois, Indiana, and Kentucky rich in coal and oil.
Illustris
Illustris is a suite of large cosmological hydrodynamical simulations of galaxy formation, run with the moving-mesh code Arepo and completed in late 2013, producing about 40,000 well-resolved galaxies in a box 106.5 megaparsecs on a side.
IllustrisTNG
IllustrisTNG ("The Next Generation") is a series of large cosmological magnetohydrodynamical simulations of galaxy formation, run with the moving-mesh code Arepo as the successor to Illustris.
Ilmarë (moon)
Ilmarë is the large satellite of the trans-Neptunian object Varda, discovered in 2009 in Hubble images and named in 2014 after a handmaid of Varda in Tolkien's mythology.
Ilmenite
Ilmenite is a black, weakly magnetic iron titanium oxide mineral, FeTiO₃, and the world's principal ore of titanium, named after Russia's Ilmen Mountains in 1827.
Ilona Stengel
Ilona Stengel is a chemist who researches materials for organic light-emitting diodes and has served as OLED Intellectual Property Liaison at Merck Electronics KGaA in Darmstadt since October 2023.
Ilya Lifshitz
Ilya Lifshitz (Илья Михайлович Лифшиц, 1917–1982) was a Soviet theoretical physicist in condensed matter who led theory departments in Kharkov and Moscow and gave his name to the Lifshitz–Kosevich formula, Lifshitz tails, and the Lifshitz transition.
Ilya Piatetski-Shapiro
Ilya Piatetski-Shapiro (Илья Иосифович Пятецкий-Шапиро; 1929–2009) was a Soviet-born Israeli mathematician who co-founded the theory of automorphic representations, proved a 1953 prime number theorem for ⌊n^c⌋ sequences, and won the Israel Prize and Wolf Prize.
Ilya Prigogine
Ilya Prigogine, born Ilya Romanovich Prigogin in Moscow in 1917, was a Belgian physical chemist who won the 1977 Nobel Prize in Chemistry for his theory of dissipative structures.
Image (mathematics)
In mathematics, the image of a function is the set of all outputs it produces, and the image of a set under a function collects those outputs.
Image resolution
Image resolution, also called picture resolution, is an imaging system's ability to distinguish finely spaced detail, given as a spatial frequency in line pairs per millimeter, distinct from pixel count.
Image sensor format
Image sensor format, also known as sensor size, is the nominal designation for the physical size of a digital camera's sensor, determining field of view and light gathering.
Image stabilization
Image stabilization is a family of hardware and software techniques that reduce camera-shake blur in photos and video, by moving a lens or sensor or correcting digitally.
Image velocimetry
Image velocimetry is a family of image-based methods that estimate fluid flow velocities by tracking particles or surface patterns across images, producing a two-dimensional velocity field.
Image-guided radiation therapy
Image-guided radiation therapy (IGRT) uses pictures from CT, ultrasound, or X-ray to guide the radiation beam at the tumor, improving accuracy and sparing healthy tissue.
Imaginary number
An imaginary number, also called a purely imaginary number, is a number whose square is negative, such as multiples of the imaginary unit i, where i squared equals −1.
Imaginary time
Imaginary time is a mathematical device in quantum mechanics in which time is continued to imaginary values by a Wick rotation, turning quantum dynamics into statistical mechanics.