All articles starting with I
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Immanuel Velikovsky (Иммануил Великовский)
Immanuel Velikovsky (Иммануил Великовский, 1895–1979) was a Russian-born psychiatrist and psychoanalyst whose 1950 bestseller Worlds in Collision claimed recent planetary catastrophes, igniting fierce scientific controversy.
Immanuel Wallerstein
Immanuel Wallerstein, also known as Immanuel Maurice Wallerstein, was an American historical sociologist who developed world-systems analysis. His work argued the modern world system emerged in the sixteenth century.
ImMature
ImMature (I'mMature) is a TVF Hindi coming-of-age comedy-drama web series about teenager Dhruv, his friends Kabir and Susu, and crush Chhavi; first Indian show nominated at Canneseries 2018, three seasons, now on Prime Video.
Immature B cell
Immature B cell (newly formed B cell): a bone marrow B lymphocyte, surface IgM-positive and IgD-negative, not yet class-switched or antigen-exposed; screened by central tolerance through receptor editing and clonal deletion before becoming a transitional B cell.
Immature microglial cell
Immature microglial cell (CL:0002628), also called immature, quiescent, or resting microglia: a developmental, ramified microglial cell type, CD34-positive and CD163-, MHCI-, MHCII-negative, arising from yolk sac precursors.
Immature neutrophil
Immature neutrophil (Cell Ontology CL:0000776): developing neutrophil forms such as myelocytes, metamyelocytes, and band cells with specific granules but incomplete maturation; released in left shift during sepsis, inflammation, and cancer.
IMMDC study
IMMDC (NCT04302363), Analysis of Intestinal Microflora Combined With DNA Methylation in Stool to Detect Colorectal Cancer, an observational case-control study at Xiangya Hospital, China, building a CRC screening model from 16S rRNA fecal microbiota plus exfoliated-cell DNA methylation in 500 participants.
Immediate early response
Immediate early response (IER): rapid cellular gene-expression program in which immediate-early genes (c-fos, c-jun, Egr-1, Arc, IER3) are transcribed within minutes of stimulation without new protein synthesis, via ERK/MAPK signaling.
Immediate family
Immediate family: the closest circle of relatives, usually spouse, parents, and children. No single legal definition exists; US labor, criminal, immigration, state, Canadian, and Australian rules each define it differently.
Immediate implant placement
Immediate implant placement is a dental procedure in which an implant is inserted into the fresh extraction socket on the same day as tooth removal.
Immediate-Early Genes
Immediate-early genes (IEGs, primary response genes) are genes expressed rapidly and transiently without new protein synthesis, first named for viral genes; cellular examples include FOS, JUN, EGR1/Zif268, and Arc, central to memory and used as neuronal activity markers.
Immelmann turn
The Immelmann turn is an aerobatic maneuver in which a plane pulls up into a half loop, then rolls half a turn to upright on the opposite heading.
Immensee
Immensee is an 1850 novella by the German writer Theodor Storm telling of Reinhard and Elisabeth, childhood sweethearts who part; it was Storm's breakthrough, reaching more than thirty editions.
Immersed boundary method
The immersed boundary method is a numerical technique for simulating fluid–structure interaction on a fixed grid, introduced by Charles S. Peskin in 1972 for heart valve flow.
Immersed tube
An immersed tube, also called an immersed tunnel, is a subaqueous tunnel of prefabricated elements floated out, sunk into a dredged trench, and joined underwater.
Immersed tube tunnel
An immersed tube tunnel is an underwater tunnel built by sinking prefabricated tube elements into a trench and joining them underwater, first used in Boston Harbor in 1893.
Immersion cooling
Immersion cooling, also called submersion cooling, is a data center technique that submerges servers in nonconductive dielectric liquid, cooling all components directly and cutting cooling energy.
Immersion lithography
Immersion lithography is a semiconductor photolithography technique in which purified water fills the gap between the final lens and the wafer, raising the numerical aperture from 0.93 to 1.35 and enabling sub-40-nm patterning.
Immersive Gamebox
Immersive Gamebox, formerly Electric Gamebox, is a London-based location-based entertainment company founded in 2018 by Will Dean and David Spindler, operating 32 Gamebox venues across five countries by 2025.
Immersive sim
Immersive sim (immersive simulation): a video game design tradition from Looking Glass Studios (Ultima Underworld, System Shock, Thief) defined by systemic gameplay, emergence, and player agency; term coined by Warren Spector in the 2000 Deus Ex postmortem.
Immeya
Immeya was a king of Ebla in the 18th century BC, known from inscribed silver objects found in the royal funerary area at Tell Mardikh.
Immigrant generations
Immigrant generations classify families after migration: first generation is foreign-born, second generation born in the country with at least one immigrant parent, third and higher with two native-born parents. Covers census definitions, the 1.5 generation, colloquial usage, and assimilation research.
Immigrant Song
Immigrant Song: 1970 Led Zeppelin song by Plant and Page opening Led Zeppelin III, inspired by the band's June 22, 1970 Reykjavik, Iceland concert; Viking-themed, 2:25, US No. 16 hit, famous for Thor: Ragnarok and School of Rock uses.
Immigration
Immigration is the movement of people into a country other than where they were born, intending to settle there, with about 304 million international migrants by 2024.
Immigration Act of 1924
The Immigration Act of 1924, also called the Johnson-Reed Act or National Origins Act (Public Law 68-139), set national-origins quotas of 2% of the 1890 census, capped Eastern Hemisphere immigration, and barred Asian immigrants until the 1965 Hart-Celler repeal.
Immigration and crime
Immigration and crime is a field of research examining how immigration affects criminal offending, finding that immigrants commit crimes at rates similar to or lower than native-born populations.
Immigration and Nationality Act of 1952
The Immigration and Nationality Act of 1952, or McCarran-Walter Act, is the foundational U.S. immigration statute, enacted over Truman's veto; it kept national origins quotas, ended Asian exclusion, and added ideological exclusion and Section 212(f).
Immigration and Nationality Act of 1965
The Immigration and Nationality Act of 1965 (Hart–Celler Act, PL 89-236), signed October 3, 1965, abolished national-origins quotas, created hemispheric caps and family-first preferences, and reshaped U.S. immigrant origins toward Asia and Latin America.
Immigration and Refugee Board of Canada
Immigration and Refugee Board of Canada (IRB; Commission de l'immigration et du statut de réfugié du Canada), Canada's largest independent administrative tribunal, established 1989, decides refugee claims, appeals, admissibility hearings, and detention reviews through four divisions under IRPA.
Immigration detentions of U.S. citizens in the second Trump administration
Immigration detentions of U.S. citizens in the second Trump administration: ICE and other federal agents holding American citizens during 2025-2026 enforcement operations; ProPublica counted 506 cases, the government denies a pattern.