All articles starting with I
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Incidence (epidemiology)
Incidence in epidemiology is the frequency of new cases of disease in a population over a specified period, measured as incidence proportion (risk) or incidence rate (per person-time), distinct from prevalence, which counts all existing cases.
Incidence algebra
An incidence algebra is an associative algebra attached to a locally finite partially ordered set, introduced systematically by Gian-Carlo Rota in 1964 as the home of Möbius inversion.
Incidence matrix
An incidence matrix is a matrix recording which elements of one set are incident with elements of another, with rows for vertices and columns for edges.
Incident at Jiangdu
The Incident at Jiangdu (江都之变), also called the Jiangdu mutiny, was the 618 mutiny at Jiangdu in which Yuwen Huaji killed Emperor Yang of Sui.
Incident at Mawei Station
The Incident at Mawei Station was the 756 mutiny in which imperial soldiers killed chancellor Yang Guozhong and forced Emperor Xuanzong to have Consort Yang strangled.
Incident Command System
The Incident Command System (ICS) is a standardized approach to on-scene incident management, developed in the 1970s to manage fast-moving California wildfires and now the command component of NIMS.
Incident on Hill 192
Incident on Hill 192, also called Casualties of War: the 1966 kidnapping, rape, and murder of Phan Thi Mao by four US soldiers of the 1st Cavalry Division in Vietnam, exposed by a fellow soldier and recounted in Daniel Lang's 1970 book and De Palma's 1989 film.
Incidente em Antares
Incidente em Antares is a 1971 novel by the Brazilian writer Érico Veríssimo, set in the fictional town of Antares in Rio Grande do Sul.
Incidents Around the House
Incidents Around the House is Josh Malerman's 2024 supernatural horror novel (Del Rey), narrated by eight-year-old Bela, whose family is stalked by the closet entity Other Mommy; adapted as the film Other Mommy with Jessica Chastain.
Incidents at European amusement parks
Incidents at European amusement parks are accidents and safety failures on rides at parks across Europe, ranging from minor injuries to the fatal 2023 Gröna Lund Jetline derailment.
Incidents at Six Flags parks
Incidents at Six Flags parks are notable accidents and deaths at Six Flags theme and water parks, including the 1984 Haunted Castle fire that killed eight visitors.
Incidents at Universal parks
Incidents at Universal parks: injuries, deaths, and malfunctions at Universal Destinations & Experiences parks, centered on the 2025 Stardust Racers death at Epic Universe and Florida's large-park self-inspection exemption.
Incidents during the Hajj
Incidents during the Hajj, also called disasters during Hajj, are the deaths and injuries at the annual Islamic pilgrimage to Mecca, from crowd crushes, extreme heat, and disease.
Incidents in the Life of a Slave Girl
Incidents in the Life of a Slave Girl (1861), Harriet Jacobs's autobiography under the pseudonym Linda Brent, edited by Lydia Maria Child; the most widely read female antebellum slave narrative, documenting sexual exploitation, seven years hiding, and authenticated by Yellin.
Incidents of necrophilia
Incidents of necrophilia, also called sexual attraction to corpses, a rare paraphilia; documented through Rosman and Resnick's 122-case review, Aggrawal's 10-class system, and homicidal case studies.
Incineration
Incineration, also called waste incineration, is the thermal treatment of waste by combustion that cuts its volume, reducing 2,000 pounds of garbage to 300 to 600 pounds of ash.
Incipient fault detection
Incipient fault detection is a condition-monitoring approach that identifies weak, early-stage fault symptoms in machinery or industrial systems from sensor signals, before they grow into failures conventional limit checking can catch.
Incipit
Incipit: Latin "here begins"; the first words of a medieval manuscript, from the formula Incipit liber, extended in criticism to a work's opening lines; counterpart the explicit; studied by genetic criticism and Aragon.
Incircle
The incircle, or inscribed circle, of a triangle is the unique circle inside it tangent to all three sides, with center the incenter and radius the inradius r, satisfying K = rs.
İncirliin Cave
İncirliin Mağarası is a 345-meter fossil cave southwest of Milas in Muğla Province, Turkey, where excavations since 2016 have found human remains, stone tools, and pottery from prehistory to antiquity.
Incirlik Air Base
Incirlik Air Base, formerly Adana Air Base, is a joint Turkish–American air base near Adana, Turkey, hosting the U.S. Air Force's 39th Air Base Wing.
Incised valley
An incised valley is a valley cut by a river into coastal-plain strata after a sea-level fall, later filled with sediment during renewed sea-level rise.
Incision and drainage
Incision and drainage (I&D) is a surgical procedure that cuts into an abscess to evacuate pus, achieving source control; more than 1.4 million are performed yearly in the United States.
Incisional biopsy
Incisional biopsy, contrasted with excisional biopsy, is a surgical diagnostic procedure removing only part of a lesion, used when malignancy needs tissue diagnosis before definitive surgery.
Incisional hernia repair
Incisional hernia repair is surgery to close and reinforce a hernia that developed at a previous abdominal incision site, using sutures, mesh, or both, with mesh repair preferred for larger defects.
Incisional negative pressure wound therapy
Incisional negative pressure wound therapy (ciNPWT, also called closed-incision negative pressure therapy) applies sealed suction dressings over fresh surgical incisions for several days, reducing surgical site infection and dehiscence in high-risk patients.
Incisor
Incisor: front tooth for cutting or gnawing in both jaws; humans have eight (central and lateral per quadrant). Covers anatomy, mamelons, shoveling, trauma management, and rodent ever-growing incisors.
Incitatus
Incitatus, Caligula's favorite racehorse, reportedly kept in a marble stall with ivory manger, fed gold-flecked oats, promised a consulship by the emperor but never appointed one; Suetonius and Cassius Dio are the main sources.
Incitement
Incitement: inchoate criminal liability for urging or persuading another to commit an offence, also called solicitation in the US. Covers common law elements, codified tests, and the US Brandenburg imminent lawless action standard.
Inclacumab
Inclacumab (RO4905417, RG1512, HuMab 002) is a fully human IgG4 anti-P-selectin monoclonal antibody blocking P-selectin-PSGL-1 binding, developed for sickle cell disease; its Phase 3 THRIVE-131 trial missed its VOC-reduction endpoint in 2025.